FFmpeg coverage

Directory: ../../../ffmpeg/
File: src/libavcodec/vp3.c
Date: 2025-10-18 21:50:22
Exec Total Coverage
Lines: 1232 1516 81.3%
Functions: 41 44 93.2%
Branches: 799 1076 74.3%
Line Branch Exec Source
1 /*
2 * Copyright (C) 2003-2004 The FFmpeg project
3 * Copyright (C) 2019 Peter Ross
4 *
5 * This file is part of FFmpeg.
6 *
7 * FFmpeg is free software; you can redistribute it and/or
8 * modify it under the terms of the GNU Lesser General Public
9 * License as published by the Free Software Foundation; either
10 * version 2.1 of the License, or (at your option) any later version.
11 *
12 * FFmpeg is distributed in the hope that it will be useful,
13 * but WITHOUT ANY WARRANTY; without even the implied warranty of
14 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
15 * Lesser General Public License for more details.
16 *
17 * You should have received a copy of the GNU Lesser General Public
18 * License along with FFmpeg; if not, write to the Free Software
19 * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA
20 */
21
22 /**
23 * @file
24 * On2 VP3/VP4 Video Decoder
25 *
26 * VP3 Video Decoder by Mike Melanson (mike at multimedia.cx)
27 * For more information about the VP3 coding process, visit:
28 * http://wiki.multimedia.cx/index.php?title=On2_VP3
29 *
30 * Theora decoder by Alex Beregszaszi
31 */
32
33 #include "config_components.h"
34
35 #include <stddef.h>
36 #include <string.h>
37
38 #include "libavutil/attributes.h"
39 #include "libavutil/emms.h"
40 #include "libavutil/imgutils.h"
41 #include "libavutil/mem.h"
42 #include "libavutil/mem_internal.h"
43 #include "libavutil/thread.h"
44
45 #include "avcodec.h"
46 #include "codec_internal.h"
47 #include "decode.h"
48 #include "get_bits.h"
49 #include "hpeldsp.h"
50 #include "internal.h"
51 #include "jpegquanttables.h"
52 #include "mathops.h"
53 #include "progressframe.h"
54 #include "libavutil/refstruct.h"
55 #include "thread.h"
56 #include "videodsp.h"
57 #include "vp3data.h"
58 #include "vp4data.h"
59 #include "vp3dsp.h"
60 #include "xiph.h"
61
62 #define VP3_MV_VLC_BITS 6
63 #define VP4_MV_VLC_BITS 6
64 #define SUPERBLOCK_VLC_BITS 6
65
66 #define FRAGMENT_PIXELS 8
67
68 // FIXME split things out into their own arrays
69 typedef struct Vp3Fragment {
70 int16_t dc;
71 uint8_t coding_method;
72 uint8_t qpi;
73 } Vp3Fragment;
74
75 #define SB_NOT_CODED 0
76 #define SB_PARTIALLY_CODED 1
77 #define SB_FULLY_CODED 2
78
79 // This is the maximum length of a single long bit run that can be encoded
80 // for superblock coding or block qps. Theora special-cases this to read a
81 // bit instead of flipping the current bit to allow for runs longer than 4129.
82 #define MAXIMUM_LONG_BIT_RUN 4129
83
84 #define MODE_INTER_NO_MV 0
85 #define MODE_INTRA 1
86 #define MODE_INTER_PLUS_MV 2
87 #define MODE_INTER_LAST_MV 3
88 #define MODE_INTER_PRIOR_LAST 4
89 #define MODE_USING_GOLDEN 5
90 #define MODE_GOLDEN_MV 6
91 #define MODE_INTER_FOURMV 7
92 #define CODING_MODE_COUNT 8
93
94 /* special internal mode */
95 #define MODE_COPY 8
96
97 static int theora_decode_header(AVCodecContext *avctx, GetBitContext *gb);
98 static int theora_decode_tables(AVCodecContext *avctx, GetBitContext *gb);
99
100
101 /* There are 6 preset schemes, plus a free-form scheme */
102 static const int ModeAlphabet[6][CODING_MODE_COUNT] = {
103 /* scheme 1: Last motion vector dominates */
104 { MODE_INTER_LAST_MV, MODE_INTER_PRIOR_LAST,
105 MODE_INTER_PLUS_MV, MODE_INTER_NO_MV,
106 MODE_INTRA, MODE_USING_GOLDEN,
107 MODE_GOLDEN_MV, MODE_INTER_FOURMV },
108
109 /* scheme 2 */
110 { MODE_INTER_LAST_MV, MODE_INTER_PRIOR_LAST,
111 MODE_INTER_NO_MV, MODE_INTER_PLUS_MV,
112 MODE_INTRA, MODE_USING_GOLDEN,
113 MODE_GOLDEN_MV, MODE_INTER_FOURMV },
114
115 /* scheme 3 */
116 { MODE_INTER_LAST_MV, MODE_INTER_PLUS_MV,
117 MODE_INTER_PRIOR_LAST, MODE_INTER_NO_MV,
118 MODE_INTRA, MODE_USING_GOLDEN,
119 MODE_GOLDEN_MV, MODE_INTER_FOURMV },
120
121 /* scheme 4 */
122 { MODE_INTER_LAST_MV, MODE_INTER_PLUS_MV,
123 MODE_INTER_NO_MV, MODE_INTER_PRIOR_LAST,
124 MODE_INTRA, MODE_USING_GOLDEN,
125 MODE_GOLDEN_MV, MODE_INTER_FOURMV },
126
127 /* scheme 5: No motion vector dominates */
128 { MODE_INTER_NO_MV, MODE_INTER_LAST_MV,
129 MODE_INTER_PRIOR_LAST, MODE_INTER_PLUS_MV,
130 MODE_INTRA, MODE_USING_GOLDEN,
131 MODE_GOLDEN_MV, MODE_INTER_FOURMV },
132
133 /* scheme 6 */
134 { MODE_INTER_NO_MV, MODE_USING_GOLDEN,
135 MODE_INTER_LAST_MV, MODE_INTER_PRIOR_LAST,
136 MODE_INTER_PLUS_MV, MODE_INTRA,
137 MODE_GOLDEN_MV, MODE_INTER_FOURMV },
138 };
139
140 static const uint8_t hilbert_offset[16][2] = {
141 { 0, 0 }, { 1, 0 }, { 1, 1 }, { 0, 1 },
142 { 0, 2 }, { 0, 3 }, { 1, 3 }, { 1, 2 },
143 { 2, 2 }, { 2, 3 }, { 3, 3 }, { 3, 2 },
144 { 3, 1 }, { 2, 1 }, { 2, 0 }, { 3, 0 }
145 };
146
147 enum {
148 VP4_DC_INTRA = 0,
149 VP4_DC_INTER = 1,
150 VP4_DC_GOLDEN = 2,
151 NB_VP4_DC_TYPES,
152 VP4_DC_UNDEFINED = NB_VP4_DC_TYPES
153 };
154
155 static const uint8_t vp4_pred_block_type_map[8] = {
156 [MODE_INTER_NO_MV] = VP4_DC_INTER,
157 [MODE_INTRA] = VP4_DC_INTRA,
158 [MODE_INTER_PLUS_MV] = VP4_DC_INTER,
159 [MODE_INTER_LAST_MV] = VP4_DC_INTER,
160 [MODE_INTER_PRIOR_LAST] = VP4_DC_INTER,
161 [MODE_USING_GOLDEN] = VP4_DC_GOLDEN,
162 [MODE_GOLDEN_MV] = VP4_DC_GOLDEN,
163 [MODE_INTER_FOURMV] = VP4_DC_INTER,
164 };
165
166 static VLCElem superblock_run_length_vlc[88]; /* version < 2 */
167 static VLCElem fragment_run_length_vlc[56]; /* version < 2 */
168 static VLCElem motion_vector_vlc[112]; /* version < 2 */
169
170 // The VP4 tables reuse this vlc.
171 static VLCElem mode_code_vlc[24 + 2108 * CONFIG_VP4_DECODER];
172
173 #if CONFIG_VP4_DECODER
174 static const VLCElem *vp4_mv_vlc_table[2][7]; /* version >= 2 */
175 static const VLCElem *block_pattern_vlc[2]; /* version >= 2 */
176 #endif
177
178 typedef struct {
179 int dc;
180 int type;
181 } VP4Predictor;
182
183 #define MIN_DEQUANT_VAL 2
184
185 typedef struct HuffEntry {
186 uint8_t len, sym;
187 } HuffEntry;
188
189 typedef struct HuffTable {
190 HuffEntry entries[32];
191 uint8_t nb_entries;
192 } HuffTable;
193
194 typedef struct CoeffVLCs {
195 const VLCElem *vlc_tabs[80];
196 VLC vlcs[80];
197 } CoeffVLCs;
198
199 typedef struct Vp3DecodeContext {
200 AVCodecContext *avctx;
201 int theora, theora_tables, theora_header;
202 int version;
203 int width, height;
204 int chroma_x_shift, chroma_y_shift;
205 ProgressFrame golden_frame;
206 ProgressFrame last_frame;
207 ProgressFrame current_frame;
208 int keyframe;
209 uint8_t idct_permutation[64];
210 uint8_t idct_scantable[64];
211 HpelDSPContext hdsp;
212 VideoDSPContext vdsp;
213 VP3DSPContext vp3dsp;
214 DECLARE_ALIGNED(16, int16_t, block)[64];
215 int flipped_image;
216 int last_slice_end;
217 int skip_loop_filter;
218
219 int qps[3];
220 int nqps;
221 int last_qps[3];
222
223 int superblock_count;
224 int y_superblock_width;
225 int y_superblock_height;
226 int y_superblock_count;
227 int c_superblock_width;
228 int c_superblock_height;
229 int c_superblock_count;
230 int u_superblock_start;
231 int v_superblock_start;
232 unsigned char *superblock_coding;
233
234 int macroblock_count; /* y macroblock count */
235 int macroblock_width;
236 int macroblock_height;
237 int c_macroblock_count;
238 int c_macroblock_width;
239 int c_macroblock_height;
240 int yuv_macroblock_count; /* y+u+v macroblock count */
241
242 int fragment_count;
243 int fragment_width[2];
244 int fragment_height[2];
245
246 Vp3Fragment *all_fragments;
247 int fragment_start[3];
248 int data_offset[3];
249 uint8_t offset_x;
250 uint8_t offset_y;
251 int offset_x_warned;
252
253 int8_t (*motion_val[2])[2];
254
255 /* tables */
256 uint16_t coded_dc_scale_factor[2][64];
257 uint32_t coded_ac_scale_factor[64];
258 uint8_t base_matrix[384][64];
259 uint8_t qr_count[2][3];
260 uint8_t qr_size[2][3][64];
261 uint16_t qr_base[2][3][64];
262
263 /**
264 * This is a list of all tokens in bitstream order. Reordering takes place
265 * by pulling from each level during IDCT. As a consequence, IDCT must be
266 * in Hilbert order, making the minimum slice height 64 for 4:2:0 and 32
267 * otherwise. The 32 different tokens with up to 12 bits of extradata are
268 * collapsed into 3 types, packed as follows:
269 * (from the low to high bits)
270 *
271 * 2 bits: type (0,1,2)
272 * 0: EOB run, 14 bits for run length (12 needed)
273 * 1: zero run, 7 bits for run length
274 * 7 bits for the next coefficient (3 needed)
275 * 2: coefficient, 14 bits (11 needed)
276 *
277 * Coefficients are signed, so are packed in the highest bits for automatic
278 * sign extension.
279 */
280 int16_t *dct_tokens[3][64];
281 int16_t *dct_tokens_base;
282 #define TOKEN_EOB(eob_run) ((eob_run) << 2)
283 #define TOKEN_ZERO_RUN(coeff, zero_run) (((coeff) * 512) + ((zero_run) << 2) + 1)
284 #define TOKEN_COEFF(coeff) (((coeff) * 4) + 2)
285
286 /**
287 * number of blocks that contain DCT coefficients at
288 * the given level or higher
289 */
290 int num_coded_frags[3][64];
291 int total_num_coded_frags;
292
293 /* this is a list of indexes into the all_fragments array indicating
294 * which of the fragments are coded */
295 int *coded_fragment_list[3];
296
297 int *kf_coded_fragment_list;
298 int *nkf_coded_fragment_list;
299 int num_kf_coded_fragment[3];
300
301 /**
302 * The first 16 of the following VLCs are for the dc coefficients;
303 * the others are four groups of 16 VLCs each for ac coefficients.
304 * This is a RefStruct reference to share these VLCs between threads.
305 */
306 CoeffVLCs *coeff_vlc;
307
308 /* these arrays need to be on 16-byte boundaries since SSE2 operations
309 * index into them */
310 DECLARE_ALIGNED(16, int16_t, qmat)[3][2][3][64]; ///< qmat[qpi][is_inter][plane]
311
312 /* This table contains superblock_count * 16 entries. Each set of 16
313 * numbers corresponds to the fragment indexes 0..15 of the superblock.
314 * An entry will be -1 to indicate that no entry corresponds to that
315 * index. */
316 int *superblock_fragments;
317
318 /* This is an array that indicates how a particular macroblock
319 * is coded. */
320 unsigned char *macroblock_coding;
321
322 uint8_t *edge_emu_buffer;
323
324 /* Huffman decode */
325 HuffTable huffman_table[5 * 16];
326
327 uint8_t filter_limit_values[64];
328 DECLARE_ALIGNED(16, int, bounding_values_array)[256 + 4];
329
330 VP4Predictor * dc_pred_row; /* dc_pred_row[y_superblock_width * 4] */
331 } Vp3DecodeContext;
332
333 /************************************************************************
334 * VP3 specific functions
335 ************************************************************************/
336
337 70 static av_cold void free_tables(AVCodecContext *avctx)
338 {
339 70 Vp3DecodeContext *s = avctx->priv_data;
340
341 70 av_freep(&s->superblock_coding);
342 70 av_freep(&s->all_fragments);
343 70 av_freep(&s->nkf_coded_fragment_list);
344 70 av_freep(&s->kf_coded_fragment_list);
345 70 av_freep(&s->dct_tokens_base);
346 70 av_freep(&s->superblock_fragments);
347 70 av_freep(&s->macroblock_coding);
348 70 av_freep(&s->dc_pred_row);
349 70 av_freep(&s->motion_val[0]);
350 70 av_freep(&s->motion_val[1]);
351 70 }
352
353 35 static av_cold void vp3_decode_flush(AVCodecContext *avctx)
354 {
355 35 Vp3DecodeContext *s = avctx->priv_data;
356
357 35 ff_progress_frame_unref(&s->golden_frame);
358 35 ff_progress_frame_unref(&s->last_frame);
359 35 ff_progress_frame_unref(&s->current_frame);
360 35 }
361
362 35 static av_cold int vp3_decode_end(AVCodecContext *avctx)
363 {
364 35 Vp3DecodeContext *s = avctx->priv_data;
365
366 35 free_tables(avctx);
367 35 av_freep(&s->edge_emu_buffer);
368
369 35 s->theora_tables = 0;
370
371 /* release all frames */
372 35 vp3_decode_flush(avctx);
373
374 35 av_refstruct_unref(&s->coeff_vlc);
375
376 35 return 0;
377 }
378
379 /**
380 * This function sets up all of the various blocks mappings:
381 * superblocks <-> fragments, macroblocks <-> fragments,
382 * superblocks <-> macroblocks
383 *
384 * @return 0 is successful; returns 1 if *anything* went wrong.
385 */
386 35 static int init_block_mapping(Vp3DecodeContext *s)
387 {
388 35 int j = 0;
389
390
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 140 for (int plane = 0; plane < 3; plane++) {
391 105 int sb_width = plane ? s->c_superblock_width
392
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 105 : s->y_superblock_width;
393 105 int sb_height = plane ? s->c_superblock_height
394
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 105 : s->y_superblock_height;
395 105 int frag_width = s->fragment_width[!!plane];
396 105 int frag_height = s->fragment_height[!!plane];
397
398
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 1758 for (int sb_y = 0; sb_y < sb_height; sb_y++)
399
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 48052 for (int sb_x = 0; sb_x < sb_width; sb_x++)
400
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 788783 for (int i = 0; i < 16; i++) {
401 742384 int x = 4 * sb_x + hilbert_offset[i][0];
402 742384 int y = 4 * sb_y + hilbert_offset[i][1];
403
404
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 742384 if (x < frag_width && y < frag_height)
405 717114 s->superblock_fragments[j++] = s->fragment_start[plane] +
406 717114 y * frag_width + x;
407 else
408 25270 s->superblock_fragments[j++] = -1;
409 }
410 }
411
412 35 return 0; /* successful path out */
413 }
414
415 /*
416 * This function sets up the dequantization tables used for a particular
417 * frame.
418 */
419 62 static void init_dequantizer(Vp3DecodeContext *s, int qpi)
420 {
421 62 int ac_scale_factor = s->coded_ac_scale_factor[s->qps[qpi]];
422
423
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 186 for (int inter = 0; inter < 2; inter++) {
424
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 496 for (int plane = 0; plane < 3; plane++) {
425 372 int dc_scale_factor = s->coded_dc_scale_factor[!!plane][s->qps[qpi]];
426 372 int sum = 0, bmi, bmj, qistart, qri;
427
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 408 for (qri = 0; qri < s->qr_count[inter][plane]; qri++) {
428 408 sum += s->qr_size[inter][plane][qri];
429
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 408 if (s->qps[qpi] <= sum)
430 372 break;
431 }
432 372 qistart = sum - s->qr_size[inter][plane][qri];
433 372 bmi = s->qr_base[inter][plane][qri];
434 372 bmj = s->qr_base[inter][plane][qri + 1];
435
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 24180 for (int i = 0; i < 64; i++) {
436 23808 int coeff = (2 * (sum - s->qps[qpi]) * s->base_matrix[bmi][i] -
437 23808 2 * (qistart - s->qps[qpi]) * s->base_matrix[bmj][i] +
438 23808 s->qr_size[inter][plane][qri]) /
439 23808 (2 * s->qr_size[inter][plane][qri]);
440
441 23808 int qmin = 8 << (inter + !i);
442
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 23808 int qscale = i ? ac_scale_factor : dc_scale_factor;
443 23808 int qbias = (1 + inter) * 3;
444
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 47616 s->qmat[qpi][inter][plane][s->idct_permutation[i]] =
445
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 23808 (i == 0 || s->version < 2) ? av_clip((qscale * coeff) / 100 * 4, qmin, 4096)
446 1512 : (qscale * (coeff - qbias) / 100 + qbias) * 4;
447 }
448 /* all DC coefficients use the same quant so as not to interfere
449 * with DC prediction */
450 372 s->qmat[qpi][inter][plane][0] = s->qmat[0][inter][plane][0];
451 }
452 }
453 62 }
454
455 /*
456 * This function initializes the loop filter boundary limits if the frame's
457 * quality index is different from the previous frame's.
458 *
459 * The filter_limit_values may not be larger than 127.
460 */
461 62 static void init_loop_filter(Vp3DecodeContext *s)
462 {
463 62 ff_vp3dsp_set_bounding_values(s->bounding_values_array, s->filter_limit_values[s->qps[0]]);
464 62 }
465
466 /*
467 * This function unpacks all of the superblock/macroblock/fragment coding
468 * information from the bitstream.
469 */
470 140 static int unpack_superblocks(Vp3DecodeContext *s, GetBitContext *gb)
471 {
472 140 const int superblock_starts[3] = {
473 140 0, s->u_superblock_start, s->v_superblock_start
474 };
475 140 int bit = 0;
476 140 int current_superblock = 0;
477 140 int current_run = 0;
478 140 int num_partial_superblocks = 0;
479
480 int current_fragment;
481 140 int plane0_num_coded_frags = 0;
482
483
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 140 if (s->keyframe) {
484 4 memset(s->superblock_coding, SB_FULLY_CODED, s->superblock_count);
485 } else {
486 /* unpack the list of partially-coded superblocks */
487 136 bit = get_bits1(gb) ^ 1;
488 136 current_run = 0;
489
490
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 8681 while (current_superblock < s->superblock_count && get_bits_left(gb) > 0) {
491
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 8545 if (s->theora && current_run == MAXIMUM_LONG_BIT_RUN)
492 ✗ bit = get_bits1(gb);
493 else
494 8545 bit ^= 1;
495
496 8545 current_run = get_vlc2(gb, superblock_run_length_vlc,
497 SUPERBLOCK_VLC_BITS, 2);
498
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 8545 if (current_run == 34)
499 437 current_run += get_bits(gb, 12);
500
501
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 8545 if (current_run > s->superblock_count - current_superblock) {
502 ✗ av_log(s->avctx, AV_LOG_ERROR,
503 "Invalid partially coded superblock run length\n");
504 ✗ return -1;
505 }
506
507 8545 memset(s->superblock_coding + current_superblock, bit, current_run);
508
509 8545 current_superblock += current_run;
510
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 8545 if (bit)
511 4237 num_partial_superblocks += current_run;
512 }
513
514 /* unpack the list of fully coded superblocks if any of the blocks were
515 * not marked as partially coded in the previous step */
516
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 136 if (num_partial_superblocks < s->superblock_count) {
517 136 int superblocks_decoded = 0;
518
519 136 current_superblock = 0;
520 136 bit = get_bits1(gb) ^ 1;
521 136 current_run = 0;
522
523
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 2240 while (superblocks_decoded < s->superblock_count - num_partial_superblocks &&
524 1052 get_bits_left(gb) > 0) {
525
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 1052 if (s->theora && current_run == MAXIMUM_LONG_BIT_RUN)
526 6 bit = get_bits1(gb);
527 else
528 1046 bit ^= 1;
529
530 1052 current_run = get_vlc2(gb, superblock_run_length_vlc,
531 SUPERBLOCK_VLC_BITS, 2);
532
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 1052 if (current_run == 34)
533 218 current_run += get_bits(gb, 12);
534
535
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 105952 for (int j = 0; j < current_run; current_superblock++) {
536
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 104900 if (current_superblock >= s->superblock_count) {
537 ✗ av_log(s->avctx, AV_LOG_ERROR,
538 "Invalid fully coded superblock run length\n");
539 ✗ return -1;
540 }
541
542 /* skip any superblocks already marked as partially coded */
543
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 104900 if (s->superblock_coding[current_superblock] == SB_NOT_CODED) {
544 88554 s->superblock_coding[current_superblock] = 2 * bit;
545 88554 j++;
546 }
547 }
548 1052 superblocks_decoded += current_run;
549 }
550 }
551
552 /* if there were partial blocks, initialize bitstream for
553 * unpacking fragment codings */
554
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 136 if (num_partial_superblocks) {
555 128 current_run = 0;
556 128 bit = get_bits1(gb);
557 /* toggle the bit because as soon as the first run length is
558 * fetched the bit will be toggled again */
559 128 bit ^= 1;
560 }
561 }
562
563 /* figure out which fragments are coded; iterate through each
564 * superblock (all planes) */
565 140 s->total_num_coded_frags = 0;
566 140 memset(s->macroblock_coding, MODE_COPY, s->macroblock_count);
567
568 280 s->coded_fragment_list[0] = s->keyframe ? s->kf_coded_fragment_list
569
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 140 : s->nkf_coded_fragment_list;
570
571
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 560 for (int plane = 0; plane < 3; plane++) {
572 420 int sb_start = superblock_starts[plane];
573 420 int sb_end = sb_start + (plane ? s->c_superblock_count
574
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 420 : s->y_superblock_count);
575 420 int num_coded_frags = 0;
576
577
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 420 if (s->keyframe) {
578
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 12 if (s->num_kf_coded_fragment[plane] == -1) {
579
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 10538 for (int i = sb_start; i < sb_end; i++) {
580 /* iterate through all 16 fragments in a superblock */
581
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 178942 for (int j = 0; j < 16; j++) {
582 /* if the fragment is in bounds, check its coding status */
583 168416 current_fragment = s->superblock_fragments[i * 16 + j];
584
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 168416 if (current_fragment != -1) {
585 162492 s->coded_fragment_list[plane][num_coded_frags++] =
586 current_fragment;
587 }
588 }
589 }
590 12 s->num_kf_coded_fragment[plane] = num_coded_frags;
591 } else
592 ✗ num_coded_frags = s->num_kf_coded_fragment[plane];
593 } else {
594
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 105594 for (int i = sb_start; i < sb_end && get_bits_left(gb) > 0; i++) {
595
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 105186 if (get_bits_left(gb) < plane0_num_coded_frags >> 2) {
596 ✗ return AVERROR_INVALIDDATA;
597 }
598 /* iterate through all 16 fragments in a superblock */
599
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 1788162 for (int j = 0; j < 16; j++) {
600 /* if the fragment is in bounds, check its coding status */
601 1682976 current_fragment = s->superblock_fragments[i * 16 + j];
602
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 1682976 if (current_fragment != -1) {
603 1598148 int coded = s->superblock_coding[i];
604
605
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 1598148 if (coded == SB_PARTIALLY_CODED) {
606 /* fragment may or may not be coded; this is the case
607 * that cares about the fragment coding runs */
608
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 241844 if (current_run-- == 0) {
609 70601 bit ^= 1;
610 70601 current_run = get_vlc2(gb, fragment_run_length_vlc, 5, 2);
611 }
612 241844 coded = bit;
613 }
614
615
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 1598148 if (coded) {
616 /* default mode; actual mode will be decoded in
617 * the next phase */
618 370084 s->all_fragments[current_fragment].coding_method =
619 MODE_INTER_NO_MV;
620 370084 s->coded_fragment_list[plane][num_coded_frags++] =
621 current_fragment;
622 } else {
623 /* not coded; copy this fragment from the prior frame */
624 1228064 s->all_fragments[current_fragment].coding_method =
625 MODE_COPY;
626 }
627 }
628 }
629 }
630 }
631
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 420 if (!plane)
632 140 plane0_num_coded_frags = num_coded_frags;
633 420 s->total_num_coded_frags += num_coded_frags;
634
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 27300 for (int i = 0; i < 64; i++)
635 26880 s->num_coded_frags[plane][i] = num_coded_frags;
636
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 420 if (plane < 2)
637 280 s->coded_fragment_list[plane + 1] = s->coded_fragment_list[plane] +
638 num_coded_frags;
639 }
640 140 return 0;
641 }
642
643 #define BLOCK_X (2 * mb_x + (k & 1))
644 #define BLOCK_Y (2 * mb_y + (k >> 1))
645
646 #if CONFIG_VP4_DECODER
647 /**
648 * @return number of blocks, or > yuv_macroblock_count on error.
649 * return value is always >= 1.
650 */
651 7007 static int vp4_get_mb_count(Vp3DecodeContext *s, GetBitContext *gb)
652 {
653 7007 int v = 1;
654 int bits;
655
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 7007 while ((bits = show_bits(gb, 9)) == 0x1ff) {
656 ✗ skip_bits(gb, 9);
657 ✗ v += 256;
658 ✗ if (v > s->yuv_macroblock_count) {
659 ✗ av_log(s->avctx, AV_LOG_ERROR, "Invalid run length\n");
660 ✗ return v;
661 }
662 }
663 #define body(n) { \
664 skip_bits(gb, 2 + n); \
665 v += (1 << n) + get_bits(gb, n); }
666 #define thresh(n) (0x200 - (0x80 >> n))
667 #define else_if(n) else if (bits < thresh(n)) body(n)
668
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 7007 if (bits < 0x100) {
669 2784 skip_bits(gb, 1);
670
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 4223 } else if (bits < thresh(0)) {
671 1763 skip_bits(gb, 2);
672 1763 v += 1;
673 }
674
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 2460 else_if(1)
675
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 1466 else_if(2)
676
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 799 else_if(3)
677
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 316 else_if(4)
678
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 92 else_if(5)
679
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 4 else_if(6)
680 ✗ else body(7)
681 #undef body
682 #undef thresh
683 #undef else_if
684 7007 return v;
685 }
686
687 4556 static int vp4_get_block_pattern(GetBitContext *gb, int *next_block_pattern_table)
688 {
689 4556 int v = get_vlc2(gb, block_pattern_vlc[*next_block_pattern_table], 5, 1);
690 4556 *next_block_pattern_table = vp4_block_pattern_table_selector[v];
691 4556 return v + 1;
692 }
693
694 24 static int vp4_unpack_macroblocks(Vp3DecodeContext *s, GetBitContext *gb)
695 {
696 int fragment;
697 int next_block_pattern_table;
698 int bit, current_run, has_partial;
699
700 24 memset(s->macroblock_coding, MODE_COPY, s->macroblock_count);
701
702
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 24 if (s->keyframe)
703 2 return 0;
704
705 22 has_partial = 0;
706 22 bit = get_bits1(gb);
707
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 4154 for (int i = 0; i < s->yuv_macroblock_count; i += current_run) {
708
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 4132 if (get_bits_left(gb) <= 0)
709 ✗ return AVERROR_INVALIDDATA;
710 4132 current_run = vp4_get_mb_count(s, gb);
711
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 4132 if (current_run > s->yuv_macroblock_count - i)
712 ✗ return -1;
713 4132 memset(s->superblock_coding + i, 2 * bit, current_run);
714 4132 bit ^= 1;
715 4132 has_partial |= bit;
716 }
717
718
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 22 if (has_partial) {
719
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 22 if (get_bits_left(gb) <= 0)
720 ✗ return AVERROR_INVALIDDATA;
721 22 bit = get_bits1(gb);
722 22 current_run = vp4_get_mb_count(s, gb);
723
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 20086 for (int i = 0; i < s->yuv_macroblock_count; i++) {
724
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 20064 if (!s->superblock_coding[i]) {
725
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 8403 if (!current_run) {
726 2853 bit ^= 1;
727 2853 current_run = vp4_get_mb_count(s, gb);
728 }
729 8403 s->superblock_coding[i] = bit;
730 8403 current_run--;
731 }
732 }
733
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 22 if (current_run) /* handle situation when vp4_get_mb_count() fails */
734 ✗ return -1;
735 }
736
737 22 next_block_pattern_table = 0;
738
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 88 for (int plane = 0, i = 0; plane < 3; plane++) {
739
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 66 int sb_width = plane ? s->c_superblock_width : s->y_superblock_width;
740
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 66 int sb_height = plane ? s->c_superblock_height : s->y_superblock_height;
741
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 66 int mb_width = plane ? s->c_macroblock_width : s->macroblock_width;
742
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 66 int mb_height = plane ? s->c_macroblock_height : s->macroblock_height;
743 66 int fragment_width = s->fragment_width[!!plane];
744 66 int fragment_height = s->fragment_height[!!plane];
745
746
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 418 for (int sb_y = 0; sb_y < sb_height; sb_y++) {
747
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 5456 for (int sb_x = 0; sb_x < sb_width; sb_x++) {
748
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 25520 for (int j = 0; j < 4; j++) {
749 20416 int mb_x = 2 * sb_x + (j >> 1);
750 20416 int mb_y = 2 * sb_y + (j >> 1) ^ (j & 1);
751 int mb_coded, pattern, coded;
752
753
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 20416 if (mb_x >= mb_width || mb_y >= mb_height)
754 352 continue;
755
756 20064 mb_coded = s->superblock_coding[i++];
757
758
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 20064 if (mb_coded == SB_FULLY_CODED)
759 11661 pattern = 0xF;
760
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 8403 else if (mb_coded == SB_PARTIALLY_CODED)
761 4556 pattern = vp4_get_block_pattern(gb, &next_block_pattern_table);
762 else
763 3847 pattern = 0;
764
765
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 100320 for (int k = 0; k < 4; k++) {
766
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 80256 if (BLOCK_X >= fragment_width || BLOCK_Y >= fragment_height)
767 ✗ continue;
768 80256 fragment = s->fragment_start[plane] + BLOCK_Y * fragment_width + BLOCK_X;
769 80256 coded = pattern & (8 >> k);
770 /* MODE_INTER_NO_MV is the default for coded fragments.
771 the actual method is decoded in the next phase. */
772
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 80256 s->all_fragments[fragment].coding_method = coded ? MODE_INTER_NO_MV : MODE_COPY;
773 }
774 }
775 }
776 }
777 }
778 22 return 0;
779 }
780 #endif
781
782 /*
783 * This function unpacks all the coding mode data for individual macroblocks
784 * from the bitstream.
785 */
786 164 static int unpack_modes(Vp3DecodeContext *s, GetBitContext *gb)
787 {
788 int scheme;
789 int current_macroblock;
790 int current_fragment;
791 int coding_mode;
792 int custom_mode_alphabet[CODING_MODE_COUNT];
793 const int *alphabet;
794 Vp3Fragment *frag;
795
796
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 164 if (s->keyframe) {
797
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 169794 for (int i = 0; i < s->fragment_count; i++)
798 169788 s->all_fragments[i].coding_method = MODE_INTRA;
799 } else {
800 /* fetch the mode coding scheme for this frame */
801 158 scheme = get_bits(gb, 3);
802
803 /* is it a custom coding scheme? */
804
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 158 if (scheme == 0) {
805
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 207 for (int i = 0; i < 8; i++)
806 184 custom_mode_alphabet[i] = MODE_INTER_NO_MV;
807
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 207 for (int i = 0; i < 8; i++)
808 184 custom_mode_alphabet[get_bits(gb, 3)] = i;
809 23 alphabet = custom_mode_alphabet;
810 } else
811 135 alphabet = ModeAlphabet[scheme - 1];
812
813 /* iterate through all of the macroblocks that contain 1 or more
814 * coded fragments */
815
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 2038 for (int sb_y = 0; sb_y < s->y_superblock_height; sb_y++) {
816
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 73930 for (int sb_x = 0; sb_x < s->y_superblock_width; sb_x++) {
817
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 72050 if (get_bits_left(gb) <= 0)
818 ✗ return -1;
819
820
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 360250 for (int j = 0; j < 4; j++) {
821 int k;
822 288200 int mb_x = 2 * sb_x + (j >> 1);
823 288200 int mb_y = 2 * sb_y + (((j >> 1) + j) & 1);
824 288200 current_macroblock = mb_y * s->macroblock_width + mb_x;
825
826
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 288200 if (mb_x >= s->macroblock_width ||
827
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✓ Branch 1 taken 279734 times.
 287276 mb_y >= s->macroblock_height)
828 8466 continue;
829
830 /* coding modes are only stored if the macroblock has
831 * at least one luma block coded, otherwise it must be
832 * INTER_NO_MV */
833
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 1073976 for (k = 0; k < 4; k++) {
834 878591 current_fragment = BLOCK_Y *
835 878591 s->fragment_width[0] + BLOCK_X;
836
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 878591 if (s->all_fragments[current_fragment].coding_method != MODE_COPY)
837 84349 break;
838 }
839
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 279734 if (k == 4) {
840 195385 s->macroblock_coding[current_macroblock] = MODE_INTER_NO_MV;
841 195385 continue;
842 }
843
844 /* mode 7 means get 3 bits for each coding mode */
845
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 84349 if (scheme == 7)
846 2750 coding_mode = get_bits(gb, 3);
847 else
848 81599 coding_mode = alphabet[get_vlc2(gb, mode_code_vlc, 4, 2)];
849
850 84349 s->macroblock_coding[current_macroblock] = coding_mode;
851
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 421745 for (k = 0; k < 4; k++) {
852 337396 frag = s->all_fragments + BLOCK_Y * s->fragment_width[0] + BLOCK_X;
853
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 337396 if (frag->coding_method != MODE_COPY)
854 307251 frag->coding_method = coding_mode;
855 }
856
857 #define SET_CHROMA_MODES \
858 if (frag[s->fragment_start[1]].coding_method != MODE_COPY) \
859 frag[s->fragment_start[1]].coding_method = coding_mode; \
860 if (frag[s->fragment_start[2]].coding_method != MODE_COPY) \
861 frag[s->fragment_start[2]].coding_method = coding_mode;
862
863
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✗ Branch 1 not taken.
 84349 if (s->chroma_y_shift) {
864 84349 frag = s->all_fragments + mb_y *
865 84349 s->fragment_width[1] + mb_x;
866
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 84349 SET_CHROMA_MODES
867 ✗ } else if (s->chroma_x_shift) {
868 ✗ frag = s->all_fragments +
869 ✗ 2 * mb_y * s->fragment_width[1] + mb_x;
870 ✗ for (k = 0; k < 2; k++) {
871 ✗ SET_CHROMA_MODES
872 ✗ frag += s->fragment_width[1];
873 }
874 } else {
875 ✗ for (k = 0; k < 4; k++) {
876 ✗ frag = s->all_fragments +
877 ✗ BLOCK_Y * s->fragment_width[1] + BLOCK_X;
878 ✗ SET_CHROMA_MODES
879 }
880 }
881 }
882 }
883 }
884 }
885
886 164 return 0;
887 }
888
889 3758 static int vp4_get_mv(GetBitContext *gb, int axis, int last_motion)
890 {
891 #if CONFIG_VP4_DECODER
892 3758 int v = get_vlc2(gb, vp4_mv_vlc_table[axis][vp4_mv_table_selector[FFABS(last_motion)]],
893 VP4_MV_VLC_BITS, 2);
894
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 3758 return last_motion < 0 ? -v : v;
895 #else
896 return 0;
897 #endif
898 }
899
900 /*
901 * This function unpacks all the motion vectors for the individual
902 * macroblocks from the bitstream.
903 */
904 164 static int unpack_vectors(Vp3DecodeContext *s, GetBitContext *gb)
905 {
906 int coding_mode;
907 int motion_x[4];
908 int motion_y[4];
909 164 int last_motion_x = 0;
910 164 int last_motion_y = 0;
911 164 int prior_last_motion_x = 0;
912 164 int prior_last_motion_y = 0;
913 164 int last_gold_motion_x = 0;
914 164 int last_gold_motion_y = 0;
915 int current_macroblock;
916 int current_fragment;
917 int frag;
918
919
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 164 if (s->keyframe)
920 6 return 0;
921
922 /* coding mode 0 is the VLC scheme; 1 is the fixed code scheme; 2 is VP4 code scheme */
923
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 158 coding_mode = s->version < 2 ? get_bits1(gb) : 2;
924
925 /* iterate through all of the macroblocks that contain 1 or more
926 * coded fragments */
927
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 2038 for (int sb_y = 0; sb_y < s->y_superblock_height; sb_y++) {
928
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 73930 for (int sb_x = 0; sb_x < s->y_superblock_width; sb_x++) {
929
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 72050 if (get_bits_left(gb) <= 0)
930 ✗ return -1;
931
932
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 360250 for (int j = 0; j < 4; j++) {
933 288200 int mb_x = 2 * sb_x + (j >> 1);
934 288200 int mb_y = 2 * sb_y + (((j >> 1) + j) & 1);
935 288200 current_macroblock = mb_y * s->macroblock_width + mb_x;
936
937
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 288200 if (mb_x >= s->macroblock_width ||
938
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 287276 mb_y >= s->macroblock_height ||
939
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 279734 s->macroblock_coding[current_macroblock] == MODE_COPY)
940 8466 continue;
941
942
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 279734 switch (s->macroblock_coding[current_macroblock]) {
943 711 case MODE_GOLDEN_MV:
944
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 711 if (coding_mode == 2) { /* VP4 */
945 337 last_gold_motion_x = motion_x[0] = vp4_get_mv(gb, 0, last_gold_motion_x);
946 337 last_gold_motion_y = motion_y[0] = vp4_get_mv(gb, 1, last_gold_motion_y);
947 337 break;
948 } /* otherwise fall through */
949 case MODE_INTER_PLUS_MV:
950 /* all 6 fragments use the same motion vector */
951
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 14558 if (coding_mode == 0) {
952 13074 motion_x[0] = get_vlc2(gb, motion_vector_vlc,
953 VP3_MV_VLC_BITS, 2);
954 13074 motion_y[0] = get_vlc2(gb, motion_vector_vlc,
955 VP3_MV_VLC_BITS, 2);
956
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 1484 } else if (coding_mode == 1) {
957 42 motion_x[0] = fixed_motion_vector_table[get_bits(gb, 6)];
958 42 motion_y[0] = fixed_motion_vector_table[get_bits(gb, 6)];
959 } else { /* VP4 */
960 1442 motion_x[0] = vp4_get_mv(gb, 0, last_motion_x);
961 1442 motion_y[0] = vp4_get_mv(gb, 1, last_motion_y);
962 }
963
964 /* vector maintenance, only on MODE_INTER_PLUS_MV */
965
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 14558 if (s->macroblock_coding[current_macroblock] == MODE_INTER_PLUS_MV) {
966 14184 prior_last_motion_x = last_motion_x;
967 14184 prior_last_motion_y = last_motion_y;
968 14184 last_motion_x = motion_x[0];
969 14184 last_motion_y = motion_y[0];
970 }
971 14558 break;
972
973 63 case MODE_INTER_FOURMV:
974 /* vector maintenance */
975 63 prior_last_motion_x = last_motion_x;
976 63 prior_last_motion_y = last_motion_y;
977
978 /* fetch 4 vectors from the bitstream, one for each
979 * Y fragment, then average for the C fragment vectors */
980
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 315 for (int k = 0; k < 4; k++) {
981 252 current_fragment = BLOCK_Y * s->fragment_width[0] + BLOCK_X;
982
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 252 if (s->all_fragments[current_fragment].coding_method != MODE_COPY) {
983
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 252 if (coding_mode == 0) {
984 48 motion_x[k] = get_vlc2(gb, motion_vector_vlc,
985 VP3_MV_VLC_BITS, 2);
986 48 motion_y[k] = get_vlc2(gb, motion_vector_vlc,
987 VP3_MV_VLC_BITS, 2);
988
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 204 } else if (coding_mode == 1) {
989 104 motion_x[k] = fixed_motion_vector_table[get_bits(gb, 6)];
990 104 motion_y[k] = fixed_motion_vector_table[get_bits(gb, 6)];
991 } else { /* VP4 */
992 100 motion_x[k] = vp4_get_mv(gb, 0, prior_last_motion_x);
993 100 motion_y[k] = vp4_get_mv(gb, 1, prior_last_motion_y);
994 }
995 252 last_motion_x = motion_x[k];
996 252 last_motion_y = motion_y[k];
997 } else {
998 ✗ motion_x[k] = 0;
999 ✗ motion_y[k] = 0;
1000 }
1001 }
1002 63 break;
1003
1004 42307 case MODE_INTER_LAST_MV:
1005 /* all 6 fragments use the last motion vector */
1006 42307 motion_x[0] = last_motion_x;
1007 42307 motion_y[0] = last_motion_y;
1008
1009 /* no vector maintenance (last vector remains the
1010 * last vector) */
1011 42307 break;
1012
1013 11934 case MODE_INTER_PRIOR_LAST:
1014 /* all 6 fragments use the motion vector prior to the
1015 * last motion vector */
1016 11934 motion_x[0] = prior_last_motion_x;
1017 11934 motion_y[0] = prior_last_motion_y;
1018
1019 /* vector maintenance */
1020 11934 prior_last_motion_x = last_motion_x;
1021 11934 prior_last_motion_y = last_motion_y;
1022 11934 last_motion_x = motion_x[0];
1023 11934 last_motion_y = motion_y[0];
1024 11934 break;
1025
1026 210535 default:
1027 /* covers intra, inter without MV, golden without MV */
1028 210535 motion_x[0] = 0;
1029 210535 motion_y[0] = 0;
1030
1031 /* no vector maintenance */
1032 210535 break;
1033 }
1034
1035 /* assign the motion vectors to the correct fragments */
1036
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 1398670 for (int k = 0; k < 4; k++) {
1037 1118936 current_fragment =
1038 1118936 BLOCK_Y * s->fragment_width[0] + BLOCK_X;
1039
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 1118936 if (s->macroblock_coding[current_macroblock] == MODE_INTER_FOURMV) {
1040 252 s->motion_val[0][current_fragment][0] = motion_x[k];
1041 252 s->motion_val[0][current_fragment][1] = motion_y[k];
1042 } else {
1043 1118684 s->motion_val[0][current_fragment][0] = motion_x[0];
1044 1118684 s->motion_val[0][current_fragment][1] = motion_y[0];
1045 }
1046 }
1047
1048
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 279734 if (s->chroma_y_shift) {
1049
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 279734 if (s->macroblock_coding[current_macroblock] == MODE_INTER_FOURMV) {
1050
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 63 motion_x[0] = RSHIFT(motion_x[0] + motion_x[1] +
1051 motion_x[2] + motion_x[3], 2);
1052
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 63 motion_y[0] = RSHIFT(motion_y[0] + motion_y[1] +
1053 motion_y[2] + motion_y[3], 2);
1054 }
1055
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 279734 if (s->version <= 2) {
1056 266358 motion_x[0] = (motion_x[0] >> 1) | (motion_x[0] & 1);
1057 266358 motion_y[0] = (motion_y[0] >> 1) | (motion_y[0] & 1);
1058 }
1059 279734 frag = mb_y * s->fragment_width[1] + mb_x;
1060 279734 s->motion_val[1][frag][0] = motion_x[0];
1061 279734 s->motion_val[1][frag][1] = motion_y[0];
1062 ✗ } else if (s->chroma_x_shift) {
1063 ✗ if (s->macroblock_coding[current_macroblock] == MODE_INTER_FOURMV) {
1064 ✗ motion_x[0] = RSHIFT(motion_x[0] + motion_x[1], 1);
1065 ✗ motion_y[0] = RSHIFT(motion_y[0] + motion_y[1], 1);
1066 ✗ motion_x[1] = RSHIFT(motion_x[2] + motion_x[3], 1);
1067 ✗ motion_y[1] = RSHIFT(motion_y[2] + motion_y[3], 1);
1068 } else {
1069 ✗ motion_x[1] = motion_x[0];
1070 ✗ motion_y[1] = motion_y[0];
1071 }
1072 ✗ if (s->version <= 2) {
1073 ✗ motion_x[0] = (motion_x[0] >> 1) | (motion_x[0] & 1);
1074 ✗ motion_x[1] = (motion_x[1] >> 1) | (motion_x[1] & 1);
1075 }
1076 ✗ frag = 2 * mb_y * s->fragment_width[1] + mb_x;
1077 ✗ for (int k = 0; k < 2; k++) {
1078 ✗ s->motion_val[1][frag][0] = motion_x[k];
1079 ✗ s->motion_val[1][frag][1] = motion_y[k];
1080 ✗ frag += s->fragment_width[1];
1081 }
1082 } else {
1083 ✗ for (int k = 0; k < 4; k++) {
1084 ✗ frag = BLOCK_Y * s->fragment_width[1] + BLOCK_X;
1085 ✗ if (s->macroblock_coding[current_macroblock] == MODE_INTER_FOURMV) {
1086 ✗ s->motion_val[1][frag][0] = motion_x[k];
1087 ✗ s->motion_val[1][frag][1] = motion_y[k];
1088 } else {
1089 ✗ s->motion_val[1][frag][0] = motion_x[0];
1090 ✗ s->motion_val[1][frag][1] = motion_y[0];
1091 }
1092 }
1093 }
1094 }
1095 }
1096 }
1097
1098 158 return 0;
1099 }
1100
1101 164 static int unpack_block_qpis(Vp3DecodeContext *s, GetBitContext *gb)
1102 {
1103 164 int num_blocks = s->total_num_coded_frags;
1104
1105
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 164 for (int qpi = 0; qpi < s->nqps - 1 && num_blocks > 0; qpi++) {
1106 ✗ int i = 0, blocks_decoded = 0, num_blocks_at_qpi = 0;
1107 int bit, run_length;
1108
1109 ✗ bit = get_bits1(gb) ^ 1;
1110 ✗ run_length = 0;
1111
1112 do {
1113 ✗ if (run_length == MAXIMUM_LONG_BIT_RUN)
1114 ✗ bit = get_bits1(gb);
1115 else
1116 ✗ bit ^= 1;
1117
1118 ✗ run_length = get_vlc2(gb, superblock_run_length_vlc,
1119 SUPERBLOCK_VLC_BITS, 2);
1120 ✗ if (run_length == 34)
1121 ✗ run_length += get_bits(gb, 12);
1122 ✗ blocks_decoded += run_length;
1123
1124 ✗ if (!bit)
1125 ✗ num_blocks_at_qpi += run_length;
1126
1127 ✗ for (int j = 0; j < run_length; i++) {
1128 ✗ if (i >= s->total_num_coded_frags)
1129 ✗ return -1;
1130
1131 ✗ if (s->all_fragments[s->coded_fragment_list[0][i]].qpi == qpi) {
1132 ✗ s->all_fragments[s->coded_fragment_list[0][i]].qpi += bit;
1133 ✗ j++;
1134 }
1135 }
1136 ✗ } while (blocks_decoded < num_blocks && get_bits_left(gb) > 0);
1137
1138 ✗ num_blocks -= num_blocks_at_qpi;
1139 }
1140
1141 164 return 0;
1142 }
1143
1144 259052 static inline int get_eob_run(GetBitContext *gb, int token)
1145 {
1146 259052 int v = eob_run_table[token].base;
1147
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 259052 if (eob_run_table[token].bits)
1148 33652 v += get_bits(gb, eob_run_table[token].bits);
1149 259052 return v;
1150 }
1151
1152 2755489 static inline int get_coeff(GetBitContext *gb, int token, int16_t *coeff)
1153 {
1154 int bits_to_get, zero_run;
1155
1156 2755489 bits_to_get = coeff_get_bits[token];
1157
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 2755489 if (bits_to_get)
1158 1617513 bits_to_get = get_bits(gb, bits_to_get);
1159 2755489 *coeff = coeff_tables[token][bits_to_get];
1160
1161 2755489 zero_run = zero_run_base[token];
1162
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 2755489 if (zero_run_get_bits[token])
1163 342682 zero_run += get_bits(gb, zero_run_get_bits[token]);
1164
1165 2755489 return zero_run;
1166 }
1167
1168 /*
1169 * This function is called by unpack_dct_coeffs() to extract the VLCs from
1170 * the bitstream. The VLCs encode tokens which are used to unpack DCT
1171 * data. This function unpacks all the VLCs for either the Y plane or both
1172 * C planes, and is called for DC coefficients or different AC coefficient
1173 * levels (since different coefficient types require different VLC tables.
1174 *
1175 * This function returns a residual eob run. E.g, if a particular token gave
1176 * instructions to EOB the next 5 fragments and there were only 2 fragments
1177 * left in the current fragment range, 3 would be returned so that it could
1178 * be passed into the next call to this same function.
1179 */
1180 26880 static int unpack_vlcs(Vp3DecodeContext *s, GetBitContext *gb,
1181 const VLCElem *vlc_table, int coeff_index,
1182 int plane,
1183 int eob_run)
1184 {
1185 26880 int j = 0;
1186 int token;
1187 26880 int zero_run = 0;
1188 26880 int16_t coeff = 0;
1189 int blocks_ended;
1190 26880 int coeff_i = 0;
1191 26880 int num_coeffs = s->num_coded_frags[plane][coeff_index];
1192 26880 int16_t *dct_tokens = s->dct_tokens[plane][coeff_index];
1193
1194 /* local references to structure members to avoid repeated dereferences */
1195 26880 const int *coded_fragment_list = s->coded_fragment_list[plane];
1196 26880 Vp3Fragment *all_fragments = s->all_fragments;
1197
1198
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 26880 if (num_coeffs < 0) {
1199 ✗ av_log(s->avctx, AV_LOG_ERROR,
1200 "Invalid number of coefficients at level %d\n", coeff_index);
1201 ✗ return AVERROR_INVALIDDATA;
1202 }
1203
1204
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 26880 if (eob_run > num_coeffs) {
1205 3487 coeff_i =
1206 3487 blocks_ended = num_coeffs;
1207 3487 eob_run -= num_coeffs;
1208 } else {
1209 23393 coeff_i =
1210 23393 blocks_ended = eob_run;
1211 23393 eob_run = 0;
1212 }
1213
1214 // insert fake EOB token to cover the split between planes or zzi
1215
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 26880 if (blocks_ended)
1216 2019 dct_tokens[j++] = blocks_ended << 2;
1217
1218
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 2087120 while (coeff_i < num_coeffs && get_bits_left(gb) > 0) {
1219 /* decode a VLC into a token */
1220 2060240 token = get_vlc2(gb, vlc_table, 11, 3);
1221 /* use the token to get a zero run, a coefficient, and an eob run */
1222
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 2060240 if ((unsigned) token <= 6U) {
1223 220061 eob_run = get_eob_run(gb, token);
1224
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 220061 if (!eob_run)
1225 ✗ eob_run = INT_MAX;
1226
1227 // record only the number of blocks ended in this plane,
1228 // any spill will be recorded in the next plane.
1229
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 220061 if (eob_run > num_coeffs - coeff_i) {
1230 1656 dct_tokens[j++] = TOKEN_EOB(num_coeffs - coeff_i);
1231 1656 blocks_ended += num_coeffs - coeff_i;
1232 1656 eob_run -= num_coeffs - coeff_i;
1233 1656 coeff_i = num_coeffs;
1234 } else {
1235 218405 dct_tokens[j++] = TOKEN_EOB(eob_run);
1236 218405 blocks_ended += eob_run;
1237 218405 coeff_i += eob_run;
1238 218405 eob_run = 0;
1239 }
1240
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 1840179 } else if (token >= 0) {
1241 1840179 zero_run = get_coeff(gb, token, &coeff);
1242
1243
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 1840179 if (zero_run) {
1244 601916 dct_tokens[j++] = TOKEN_ZERO_RUN(coeff, zero_run);
1245 } else {
1246 // Save DC into the fragment structure. DC prediction is
1247 // done in raster order, so the actual DC can't be in with
1248 // other tokens. We still need the token in dct_tokens[]
1249 // however, or else the structure collapses on itself.
1250
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 1238263 if (!coeff_index)
1251 241967 all_fragments[coded_fragment_list[coeff_i]].dc = coeff;
1252
1253 1238263 dct_tokens[j++] = TOKEN_COEFF(coeff);
1254 }
1255
1256
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 1840179 if (coeff_index + zero_run > 64) {
1257 ✗ av_log(s->avctx, AV_LOG_DEBUG,
1258 "Invalid zero run of %d with %d coeffs left\n",
1259 zero_run, 64 - coeff_index);
1260 ✗ zero_run = 64 - coeff_index;
1261 }
1262
1263 // zero runs code multiple coefficients,
1264 // so don't try to decode coeffs for those higher levels
1265
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 4381268 for (int i = coeff_index + 1; i <= coeff_index + zero_run; i++)
1266 2541089 s->num_coded_frags[plane][i]--;
1267 1840179 coeff_i++;
1268 } else {
1269 ✗ av_log(s->avctx, AV_LOG_ERROR, "Invalid token %d\n", token);
1270 ✗ return -1;
1271 }
1272 }
1273
1274
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 26880 if (blocks_ended > s->num_coded_frags[plane][coeff_index])
1275 ✗ av_log(s->avctx, AV_LOG_ERROR, "More blocks ended than coded!\n");
1276
1277 // decrement the number of blocks that have higher coefficients for each
1278 // EOB run at this level
1279
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 26880 if (blocks_ended)
1280
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 381061 for (int i = coeff_index + 1; i < 64; i++)
1281 372769 s->num_coded_frags[plane][i] -= blocks_ended;
1282
1283 // setup the next buffer
1284
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 26880 if (plane < 2)
1285 17920 s->dct_tokens[plane + 1][coeff_index] = dct_tokens + j;
1286
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 8960 else if (coeff_index < 63)
1287 8820 s->dct_tokens[0][coeff_index + 1] = dct_tokens + j;
1288
1289 26880 return eob_run;
1290 }
1291
1292 static void reverse_dc_prediction(Vp3DecodeContext *s,
1293 int first_fragment,
1294 int fragment_width,
1295 int fragment_height);
1296 /*
1297 * This function unpacks all of the DCT coefficient data from the
1298 * bitstream.
1299 */
1300 140 static int unpack_dct_coeffs(Vp3DecodeContext *s, GetBitContext *gb)
1301 {
1302 140 const VLCElem *const *coeff_vlc = s->coeff_vlc->vlc_tabs;
1303 int dc_y_table;
1304 int dc_c_table;
1305 int ac_y_table;
1306 int ac_c_table;
1307 140 int residual_eob_run = 0;
1308 const VLCElem *y_tables[64], *c_tables[64];
1309
1310 140 s->dct_tokens[0][0] = s->dct_tokens_base;
1311
1312
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 140 if (get_bits_left(gb) < 16)
1313 ✗ return AVERROR_INVALIDDATA;
1314
1315 /* fetch the DC table indexes */
1316 140 dc_y_table = get_bits(gb, 4);
1317 140 dc_c_table = get_bits(gb, 4);
1318
1319 /* unpack the Y plane DC coefficients */
1320 140 residual_eob_run = unpack_vlcs(s, gb, coeff_vlc[dc_y_table], 0,
1321 0, residual_eob_run);
1322
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 140 if (residual_eob_run < 0)
1323 ✗ return residual_eob_run;
1324
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 140 if (get_bits_left(gb) < 8)
1325 ✗ return AVERROR_INVALIDDATA;
1326
1327 /* reverse prediction of the Y-plane DC coefficients */
1328 140 reverse_dc_prediction(s, 0, s->fragment_width[0], s->fragment_height[0]);
1329
1330 /* unpack the C plane DC coefficients */
1331 140 residual_eob_run = unpack_vlcs(s, gb, coeff_vlc[dc_c_table], 0,
1332 1, residual_eob_run);
1333
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 140 if (residual_eob_run < 0)
1334 ✗ return residual_eob_run;
1335 140 residual_eob_run = unpack_vlcs(s, gb, coeff_vlc[dc_c_table], 0,
1336 2, residual_eob_run);
1337
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 140 if (residual_eob_run < 0)
1338 ✗ return residual_eob_run;
1339
1340 /* reverse prediction of the C-plane DC coefficients */
1341
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 140 if (!(s->avctx->flags & AV_CODEC_FLAG_GRAY)) {
1342 140 reverse_dc_prediction(s, s->fragment_start[1],
1343 s->fragment_width[1], s->fragment_height[1]);
1344 140 reverse_dc_prediction(s, s->fragment_start[2],
1345 s->fragment_width[1], s->fragment_height[1]);
1346 }
1347
1348
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 140 if (get_bits_left(gb) < 8)
1349 ✗ return AVERROR_INVALIDDATA;
1350 /* fetch the AC table indexes */
1351 140 ac_y_table = get_bits(gb, 4);
1352 140 ac_c_table = get_bits(gb, 4);
1353
1354 /* build tables of AC VLC tables */
1355
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 840 for (int i = 1; i <= 5; i++) {
1356 /* AC VLC table group 1 */
1357 700 y_tables[i] = coeff_vlc[ac_y_table + 16];
1358 700 c_tables[i] = coeff_vlc[ac_c_table + 16];
1359 }
1360
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 1400 for (int i = 6; i <= 14; i++) {
1361 /* AC VLC table group 2 */
1362 1260 y_tables[i] = coeff_vlc[ac_y_table + 32];
1363 1260 c_tables[i] = coeff_vlc[ac_c_table + 32];
1364 }
1365
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 1960 for (int i = 15; i <= 27; i++) {
1366 /* AC VLC table group 3 */
1367 1820 y_tables[i] = coeff_vlc[ac_y_table + 48];
1368 1820 c_tables[i] = coeff_vlc[ac_c_table + 48];
1369 }
1370
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 5180 for (int i = 28; i <= 63; i++) {
1371 /* AC VLC table group 4 */
1372 5040 y_tables[i] = coeff_vlc[ac_y_table + 64];
1373 5040 c_tables[i] = coeff_vlc[ac_c_table + 64];
1374 }
1375
1376 /* decode all AC coefficients */
1377
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 8960 for (int i = 1; i <= 63; i++) {
1378 8820 residual_eob_run = unpack_vlcs(s, gb, y_tables[i], i,
1379 0, residual_eob_run);
1380
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 8820 if (residual_eob_run < 0)
1381 ✗ return residual_eob_run;
1382
1383 8820 residual_eob_run = unpack_vlcs(s, gb, c_tables[i], i,
1384 1, residual_eob_run);
1385
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 8820 if (residual_eob_run < 0)
1386 ✗ return residual_eob_run;
1387 8820 residual_eob_run = unpack_vlcs(s, gb, c_tables[i], i,
1388 2, residual_eob_run);
1389
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 8820 if (residual_eob_run < 0)
1390 ✗ return residual_eob_run;
1391 }
1392
1393 140 return 0;
1394 }
1395
1396 #if CONFIG_VP4_DECODER
1397 /**
1398 * eob_tracker[] is instead of TOKEN_EOB(value)
1399 * a dummy TOKEN_EOB(0) value is used to make vp3_dequant work
1400 *
1401 * @return < 0 on error
1402 */
1403 63252 static int vp4_unpack_vlcs(Vp3DecodeContext *s, GetBitContext *gb,
1404 const VLCElem *const vlc_tables[64],
1405 int plane, int eob_tracker[64], int fragment)
1406 {
1407 int token;
1408 63252 int zero_run = 0;
1409 63252 int16_t coeff = 0;
1410 63252 int coeff_i = 0;
1411 int eob_run;
1412
1413
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 973472 while (!eob_tracker[coeff_i]) {
1414
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 954301 if (get_bits_left(gb) < 1)
1415 ✗ return AVERROR_INVALIDDATA;
1416
1417 954301 token = get_vlc2(gb, vlc_tables[coeff_i], 11, 3);
1418
1419 /* use the token to get a zero run, a coefficient, and an eob run */
1420
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 954301 if ((unsigned) token <= 6U) {
1421 38991 eob_run = get_eob_run(gb, token);
1422 38991 *s->dct_tokens[plane][coeff_i]++ = TOKEN_EOB(0);
1423 38991 eob_tracker[coeff_i] = eob_run - 1;
1424 38991 return 0;
1425
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 915310 } else if (token >= 0) {
1426 915310 zero_run = get_coeff(gb, token, &coeff);
1427
1428
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 915310 if (zero_run) {
1429
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 311952 if (coeff_i + zero_run > 64) {
1430 ✗ av_log(s->avctx, AV_LOG_DEBUG,
1431 "Invalid zero run of %d with %d coeffs left\n",
1432 zero_run, 64 - coeff_i);
1433 ✗ zero_run = 64 - coeff_i;
1434 }
1435 311952 *s->dct_tokens[plane][coeff_i]++ = TOKEN_ZERO_RUN(coeff, zero_run);
1436 311952 coeff_i += zero_run;
1437 } else {
1438
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 603358 if (!coeff_i)
1439 40795 s->all_fragments[fragment].dc = coeff;
1440
1441 603358 *s->dct_tokens[plane][coeff_i]++ = TOKEN_COEFF(coeff);
1442 }
1443 915310 coeff_i++;
1444
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 915310 if (coeff_i >= 64) /* > 64 occurs when there is a zero_run overflow */
1445 5090 return 0; /* stop */
1446 } else {
1447 ✗ av_log(s->avctx, AV_LOG_ERROR, "Invalid token %d\n", token);
1448 ✗ return -1;
1449 }
1450 }
1451 19171 *s->dct_tokens[plane][coeff_i]++ = TOKEN_EOB(0);
1452 19171 eob_tracker[coeff_i]--;
1453 19171 return 0;
1454 }
1455
1456 95328 static void vp4_dc_predictor_reset(VP4Predictor *p)
1457 {
1458 95328 p->dc = 0;
1459 95328 p->type = VP4_DC_UNDEFINED;
1460 95328 }
1461
1462 5568 static void vp4_dc_pred_before(const Vp3DecodeContext *s, VP4Predictor dc_pred[6][6], int sb_x)
1463 {
1464
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 27840 for (int i = 0; i < 4; i++)
1465 22272 dc_pred[0][i + 1] = s->dc_pred_row[sb_x * 4 + i];
1466
1467
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 27840 for (int j = 1; j < 5; j++)
1468
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 111360 for (int i = 0; i < 4; i++)
1469 89088 vp4_dc_predictor_reset(&dc_pred[j][i + 1]);
1470 5568 }
1471
1472 5568 static void vp4_dc_pred_after(Vp3DecodeContext *s, VP4Predictor dc_pred[6][6], int sb_x)
1473 {
1474
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 27840 for (int i = 0; i < 4; i++)
1475 22272 s->dc_pred_row[sb_x * 4 + i] = dc_pred[4][i + 1];
1476
1477
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 27840 for (int i = 1; i < 5; i++)
1478 22272 dc_pred[i][0] = dc_pred[i][4];
1479 5568 }
1480
1481 /* note: dc_pred points to the current block */
1482 63252 static int vp4_dc_pred(const Vp3DecodeContext *s, const VP4Predictor * dc_pred, const int * last_dc, int type, int plane)
1483 {
1484 63252 int count = 0;
1485 63252 int dc = 0;
1486
1487
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 63252 if (dc_pred[-6].type == type) {
1488 29726 dc += dc_pred[-6].dc;
1489 29726 count++;
1490 }
1491
1492
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 63252 if (dc_pred[6].type == type) {
1493 19581 dc += dc_pred[6].dc;
1494 19581 count++;
1495 }
1496
1497
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 63252 if (count != 2 && dc_pred[-1].type == type) {
1498 38121 dc += dc_pred[-1].dc;
1499 38121 count++;
1500 }
1501
1502
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 63252 if (count != 2 && dc_pred[1].type == type) {
1503 2073 dc += dc_pred[1].dc;
1504 2073 count++;
1505 }
1506
1507 /* using division instead of shift to correctly handle negative values */
1508
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 63252 return count == 2 ? dc / 2 : last_dc[type];
1509 }
1510
1511 48 static void vp4_set_tokens_base(Vp3DecodeContext *s)
1512 {
1513 48 int16_t *base = s->dct_tokens_base;
1514
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 192 for (int plane = 0; plane < 3; plane++) {
1515
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 9360 for (int i = 0; i < 64; i++) {
1516 9216 s->dct_tokens[plane][i] = base;
1517 9216 base += s->fragment_width[!!plane] * s->fragment_height[!!plane];
1518 }
1519 }
1520 48 }
1521
1522 24 static int vp4_unpack_dct_coeffs(Vp3DecodeContext *s, GetBitContext *gb)
1523 {
1524 24 const VLCElem *const *coeff_vlc = s->coeff_vlc->vlc_tabs;
1525 int dc_y_table;
1526 int dc_c_table;
1527 int ac_y_table;
1528 int ac_c_table;
1529 const VLCElem *tables[2][64];
1530 int eob_tracker[64];
1531 VP4Predictor dc_pred[6][6];
1532 int last_dc[NB_VP4_DC_TYPES];
1533
1534
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 24 if (get_bits_left(gb) < 16)
1535 ✗ return AVERROR_INVALIDDATA;
1536
1537 /* fetch the DC table indexes */
1538 24 dc_y_table = get_bits(gb, 4);
1539 24 dc_c_table = get_bits(gb, 4);
1540
1541 24 ac_y_table = get_bits(gb, 4);
1542 24 ac_c_table = get_bits(gb, 4);
1543
1544 /* build tables of DC/AC VLC tables */
1545
1546 /* DC table group */
1547 24 tables[0][0] = coeff_vlc[dc_y_table];
1548 24 tables[1][0] = coeff_vlc[dc_c_table];
1549
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 144 for (int i = 1; i <= 5; i++) {
1550 /* AC VLC table group 1 */
1551 120 tables[0][i] = coeff_vlc[ac_y_table + 16];
1552 120 tables[1][i] = coeff_vlc[ac_c_table + 16];
1553 }
1554
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 240 for (int i = 6; i <= 14; i++) {
1555 /* AC VLC table group 2 */
1556 216 tables[0][i] = coeff_vlc[ac_y_table + 32];
1557 216 tables[1][i] = coeff_vlc[ac_c_table + 32];
1558 }
1559
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 336 for (int i = 15; i <= 27; i++) {
1560 /* AC VLC table group 3 */
1561 312 tables[0][i] = coeff_vlc[ac_y_table + 48];
1562 312 tables[1][i] = coeff_vlc[ac_c_table + 48];
1563 }
1564
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 888 for (int i = 28; i <= 63; i++) {
1565 /* AC VLC table group 4 */
1566 864 tables[0][i] = coeff_vlc[ac_y_table + 64];
1567 864 tables[1][i] = coeff_vlc[ac_c_table + 64];
1568 }
1569
1570 24 vp4_set_tokens_base(s);
1571
1572 24 memset(last_dc, 0, sizeof(last_dc));
1573
1574
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 96 for (int plane = 0; plane < ((s->avctx->flags & AV_CODEC_FLAG_GRAY) ? 1 : 3); plane++) {
1575 72 memset(eob_tracker, 0, sizeof(eob_tracker));
1576
1577 /* initialise dc prediction */
1578
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 3720 for (int i = 0; i < s->fragment_width[!!plane]; i++)
1579 3648 vp4_dc_predictor_reset(&s->dc_pred_row[i]);
1580
1581
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 504 for (int j = 0; j < 6; j++)
1582
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 3024 for (int i = 0; i < 6; i++)
1583 2592 vp4_dc_predictor_reset(&dc_pred[j][i]);
1584
1585
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 456 for (int sb_y = 0; sb_y * 4 < s->fragment_height[!!plane]; sb_y++) {
1586
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 5952 for (int sb_x = 0; sb_x *4 < s->fragment_width[!!plane]; sb_x++) {
1587 5568 vp4_dc_pred_before(s, dc_pred, sb_x);
1588
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 94656 for (int j = 0; j < 16; j++) {
1589 89088 int hx = hilbert_offset[j][0];
1590 89088 int hy = hilbert_offset[j][1];
1591 89088 int x = 4 * sb_x + hx;
1592 89088 int y = 4 * sb_y + hy;
1593 89088 VP4Predictor *this_dc_pred = &dc_pred[hy + 1][hx + 1];
1594 int fragment, dc_block_type;
1595
1596
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 89088 if (x >= s->fragment_width[!!plane] || y >= s->fragment_height[!!plane])
1597 1536 continue;
1598
1599 87552 fragment = s->fragment_start[plane] + y * s->fragment_width[!!plane] + x;
1600
1601
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 87552 if (s->all_fragments[fragment].coding_method == MODE_COPY)
1602 24300 continue;
1603
1604
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 63252 if (vp4_unpack_vlcs(s, gb, tables[!!plane], plane, eob_tracker, fragment) < 0)
1605 ✗ return -1;
1606
1607 63252 dc_block_type = vp4_pred_block_type_map[s->all_fragments[fragment].coding_method];
1608
1609 63252 s->all_fragments[fragment].dc +=
1610 63252 vp4_dc_pred(s, this_dc_pred, last_dc, dc_block_type, plane);
1611
1612 63252 this_dc_pred->type = dc_block_type,
1613 63252 this_dc_pred->dc = last_dc[dc_block_type] = s->all_fragments[fragment].dc;
1614 }
1615 5568 vp4_dc_pred_after(s, dc_pred, sb_x);
1616 }
1617 }
1618 }
1619
1620 24 vp4_set_tokens_base(s);
1621
1622 24 return 0;
1623 }
1624 #endif
1625
1626 /*
1627 * This function reverses the DC prediction for each coded fragment in
1628 * the frame. Much of this function is adapted directly from the original
1629 * VP3 source code.
1630 */
1631 #define COMPATIBLE_FRAME(x) \
1632 (compatible_frame[s->all_fragments[x].coding_method] == current_frame_type)
1633 #define DC_COEFF(u) s->all_fragments[u].dc
1634
1635 420 static void reverse_dc_prediction(Vp3DecodeContext *s,
1636 int first_fragment,
1637 int fragment_width,
1638 int fragment_height)
1639 {
1640 #define PUL 8
1641 #define PU 4
1642 #define PUR 2
1643 #define PL 1
1644
1645 420 int i = first_fragment;
1646
1647 int predicted_dc;
1648
1649 /* DC values for the left, up-left, up, and up-right fragments */
1650 int vl, vul, vu, vur;
1651
1652 /* indexes for the left, up-left, up, and up-right fragments */
1653 int l, ul, u, ur;
1654
1655 /*
1656 * The 6 fields mean:
1657 * 0: up-left multiplier
1658 * 1: up multiplier
1659 * 2: up-right multiplier
1660 * 3: left multiplier
1661 */
1662 static const int predictor_transform[16][4] = {
1663 { 0, 0, 0, 0 },
1664 { 0, 0, 0, 128 }, // PL
1665 { 0, 0, 128, 0 }, // PUR
1666 { 0, 0, 53, 75 }, // PUR|PL
1667 { 0, 128, 0, 0 }, // PU
1668 { 0, 64, 0, 64 }, // PU |PL
1669 { 0, 128, 0, 0 }, // PU |PUR
1670 { 0, 0, 53, 75 }, // PU |PUR|PL
1671 { 128, 0, 0, 0 }, // PUL
1672 { 0, 0, 0, 128 }, // PUL|PL
1673 { 64, 0, 64, 0 }, // PUL|PUR
1674 { 0, 0, 53, 75 }, // PUL|PUR|PL
1675 { 0, 128, 0, 0 }, // PUL|PU
1676 { -104, 116, 0, 116 }, // PUL|PU |PL
1677 { 24, 80, 24, 0 }, // PUL|PU |PUR
1678 { -104, 116, 0, 116 } // PUL|PU |PUR|PL
1679 };
1680
1681 /* This table shows which types of blocks can use other blocks for
1682 * prediction. For example, INTRA is the only mode in this table to
1683 * have a frame number of 0. That means INTRA blocks can only predict
1684 * from other INTRA blocks. There are 2 golden frame coding types;
1685 * blocks encoding in these modes can only predict from other blocks
1686 * that were encoded with these 1 of these 2 modes. */
1687 static const unsigned char compatible_frame[9] = {
1688 1, /* MODE_INTER_NO_MV */
1689 0, /* MODE_INTRA */
1690 1, /* MODE_INTER_PLUS_MV */
1691 1, /* MODE_INTER_LAST_MV */
1692 1, /* MODE_INTER_PRIOR_MV */
1693 2, /* MODE_USING_GOLDEN */
1694 2, /* MODE_GOLDEN_MV */
1695 1, /* MODE_INTER_FOUR_MV */
1696 3 /* MODE_COPY */
1697 };
1698 int current_frame_type;
1699
1700 /* there is a last DC predictor for each of the 3 frame types */
1701 short last_dc[3];
1702
1703 420 int transform = 0;
1704
1705 420 vul =
1706 420 vu =
1707 420 vur =
1708 420 vl = 0;
1709 420 last_dc[0] =
1710 420 last_dc[1] =
1711 420 last_dc[2] = 0;
1712
1713 /* for each fragment row... */
1714
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 14292 for (int y = 0; y < fragment_height; y++) {
1715 /* for each fragment in a row... */
1716
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 1774512 for (int x = 0; x < fragment_width; x++, i++) {
1717
1718 /* reverse prediction if this block was coded */
1719
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 1760640 if (s->all_fragments[i].coding_method != MODE_COPY) {
1720 532576 current_frame_type =
1721 532576 compatible_frame[s->all_fragments[i].coding_method];
1722
1723 532576 transform = 0;
1724
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 532576 if (x) {
1725 528445 l = i - 1;
1726 528445 vl = DC_COEFF(l);
1727
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 528445 if (COMPATIBLE_FRAME(l))
1728 483186 transform |= PL;
1729 }
1730
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 532576 if (y) {
1731 513468 u = i - fragment_width;
1732 513468 vu = DC_COEFF(u);
1733
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 513468 if (COMPATIBLE_FRAME(u))
1734 476069 transform |= PU;
1735
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 513468 if (x) {
1736 509661 ul = i - fragment_width - 1;
1737 509661 vul = DC_COEFF(ul);
1738
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 509661 if (COMPATIBLE_FRAME(ul))
1739 461368 transform |= PUL;
1740 }
1741
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 513468 if (x + 1 < fragment_width) {
1742 505812 ur = i - fragment_width + 1;
1743 505812 vur = DC_COEFF(ur);
1744
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 505812 if (COMPATIBLE_FRAME(ur))
1745 459980 transform |= PUR;
1746 }
1747 }
1748
1749
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 532576 if (transform == 0) {
1750 /* if there were no fragments to predict from, use last
1751 * DC saved */
1752 10817 predicted_dc = last_dc[current_frame_type];
1753 } else {
1754 /* apply the appropriate predictor transform */
1755 521759 predicted_dc =
1756 521759 (predictor_transform[transform][0] * vul) +
1757 521759 (predictor_transform[transform][1] * vu) +
1758 521759 (predictor_transform[transform][2] * vur) +
1759 521759 (predictor_transform[transform][3] * vl);
1760
1761 521759 predicted_dc /= 128;
1762
1763 /* check for outranging on the [ul u l] and
1764 * [ul u ur l] predictors */
1765
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 521759 if ((transform == 15) || (transform == 13)) {
1766
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 434711 if (FFABS(predicted_dc - vu) > 128)
1767 2351 predicted_dc = vu;
1768
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 432360 else if (FFABS(predicted_dc - vl) > 128)
1769 1111 predicted_dc = vl;
1770
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 431249 else if (FFABS(predicted_dc - vul) > 128)
1771 2253 predicted_dc = vul;
1772 }
1773 }
1774
1775 /* at long last, apply the predictor */
1776 532576 DC_COEFF(i) += predicted_dc;
1777 /* save the DC */
1778 532576 last_dc[current_frame_type] = DC_COEFF(i);
1779 }
1780 }
1781 }
1782 420 }
1783
1784 2700 static void apply_loop_filter(Vp3DecodeContext *s, int plane,
1785 int ystart, int yend)
1786 {
1787 2700 int *bounding_values = s->bounding_values_array + 127;
1788
1789 2700 int width = s->fragment_width[!!plane];
1790 2700 int height = s->fragment_height[!!plane];
1791 2700 int fragment = s->fragment_start[plane] + ystart * width;
1792 2700 ptrdiff_t stride = s->current_frame.f->linesize[plane];
1793 2700 uint8_t *plane_data = s->current_frame.f->data[plane];
1794
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 2700 if (!s->flipped_image)
1795 2700 stride = -stride;
1796 2700 plane_data += s->data_offset[plane] + 8 * ystart * stride;
1797
1798
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 10530 for (int y = ystart; y < yend; y++) {
1799
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 486710 for (int x = 0; x < width; x++) {
1800 /* This code basically just deblocks on the edges of coded blocks.
1801 * However, it has to be much more complicated because of the
1802 * brain damaged deblock ordering used in VP3/Theora. Order matters
1803 * because some pixels get filtered twice. */
1804
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 478880 if (s->all_fragments[fragment].coding_method != MODE_COPY) {
1805 /* do not perform left edge filter for left columns frags */
1806
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 367025 if (x > 0) {
1807 363601 s->vp3dsp.h_loop_filter(
1808 363601 plane_data + 8 * x,
1809 stride, bounding_values);
1810 }
1811
1812 /* do not perform top edge filter for top row fragments */
1813
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 367025 if (y > 0) {
1814 349625 s->vp3dsp.v_loop_filter(
1815 349625 plane_data + 8 * x,
1816 stride, bounding_values);
1817 }
1818
1819 /* do not perform right edge filter for right column
1820 * fragments or if right fragment neighbor is also coded
1821 * in this frame (it will be filtered in next iteration) */
1822
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 367025 if ((x < width - 1) &&
1823
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 359725 (s->all_fragments[fragment + 1].coding_method == MODE_COPY)) {
1824 32268 s->vp3dsp.h_loop_filter(
1825 32268 plane_data + 8 * x + 8,
1826 stride, bounding_values);
1827 }
1828
1829 /* do not perform bottom edge filter for bottom row
1830 * fragments or if bottom fragment neighbor is also coded
1831 * in this frame (it will be filtered in the next row) */
1832
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 367025 if ((y < height - 1) &&
1833
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 352272 (s->all_fragments[fragment + width].coding_method == MODE_COPY)) {
1834 32946 s->vp3dsp.v_loop_filter(
1835 32946 plane_data + 8 * x + 8 * stride,
1836 stride, bounding_values);
1837 }
1838 }
1839
1840 478880 fragment++;
1841 }
1842 7830 plane_data += 8 * stride;
1843 }
1844 2700 }
1845
1846 /**
1847 * Pull DCT tokens from the 64 levels to decode and dequant the coefficients
1848 * for the next block in coding order
1849 */
1850 595828 static inline int vp3_dequant(Vp3DecodeContext *s, const Vp3Fragment *frag,
1851 int plane, int inter, int16_t block[64])
1852 {
1853 595828 const int16_t *dequantizer = s->qmat[frag->qpi][inter][plane];
1854 595828 const uint8_t *perm = s->idct_scantable;
1855 595828 int i = 0;
1856
1857 do {
1858 3343039 int token = *s->dct_tokens[plane][i];
1859
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 3343039 switch (token & 3) {
1860 587550 case 0: // EOB
1861
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 587550 if (--token < 4) // 0-3 are token types so the EOB run must now be 0
1862 280242 s->dct_tokens[plane][i]++;
1863 else
1864 307308 *s->dct_tokens[plane][i] = token & ~3;
1865 587550 goto end;
1866 913868 case 1: // zero run
1867 913868 s->dct_tokens[plane][i]++;
1868 913868 i += (token >> 2) & 0x7f;
1869
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 913868 if (i > 63) {
1870 ✗ av_log(s->avctx, AV_LOG_ERROR, "Coefficient index overflow\n");
1871 ✗ return i;
1872 }
1873 913868 block[perm[i]] = (token >> 9) * dequantizer[perm[i]];
1874 913868 i++;
1875 913868 break;
1876 1841621 case 2: // coeff
1877 1841621 block[perm[i]] = (token >> 2) * dequantizer[perm[i]];
1878 1841621 s->dct_tokens[plane][i++]++;
1879 1841621 break;
1880 ✗ default: // shouldn't happen
1881 ✗ return i;
1882 }
1883
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 2755489 } while (i < 64);
1884 // return value is expected to be a valid level
1885 8278 i--;
1886 595828 end:
1887 // the actual DC+prediction is in the fragment structure
1888 595828 block[0] = frag->dc * s->qmat[0][inter][plane][0];
1889 595828 return i;
1890 }
1891
1892 /**
1893 * called when all pixels up to row y are complete
1894 */
1895 1232 static void vp3_draw_horiz_band(Vp3DecodeContext *s, int y)
1896 {
1897 int h, cy;
1898 int offset[AV_NUM_DATA_POINTERS];
1899
1900
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 1232 if (HAVE_THREADS && s->avctx->active_thread_type & FF_THREAD_FRAME) {
1901 ✗ int y_flipped = s->flipped_image ? s->height - y : y;
1902
1903 /* At the end of the frame, report INT_MAX instead of the height of
1904 * the frame. This makes the other threads' ff_thread_await_progress()
1905 * calls cheaper, because they don't have to clip their values. */
1906 ✗ ff_progress_frame_report(&s->current_frame,
1907 ✗ y_flipped == s->height ? INT_MAX
1908 : y_flipped - 1);
1909 }
1910
1911
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 1232 if (!s->avctx->draw_horiz_band)
1912 1232 return;
1913
1914 ✗ h = y - s->last_slice_end;
1915 ✗ s->last_slice_end = y;
1916 ✗ y -= h;
1917
1918 ✗ if (!s->flipped_image)
1919 ✗ y = s->height - y - h;
1920
1921 ✗ cy = y >> s->chroma_y_shift;
1922 ✗ offset[0] = s->current_frame.f->linesize[0] * y;
1923 ✗ offset[1] = s->current_frame.f->linesize[1] * cy;
1924 ✗ offset[2] = s->current_frame.f->linesize[2] * cy;
1925 ✗ for (int i = 3; i < AV_NUM_DATA_POINTERS; i++)
1926 ✗ offset[i] = 0;
1927
1928 ✗ emms_c();
1929 ✗ s->avctx->draw_horiz_band(s->avctx, s->current_frame.f, offset, y, 3, h);
1930 }
1931
1932 /**
1933 * Wait for the reference frame of the current fragment.
1934 * The progress value is in luma pixel rows.
1935 */
1936 ✗ static void await_reference_row(Vp3DecodeContext *s, const Vp3Fragment *fragment,
1937 int motion_y, int y)
1938 {
1939 const ProgressFrame *ref_frame;
1940 int ref_row;
1941 ✗ int border = motion_y & 1;
1942
1943 ✗ if (fragment->coding_method == MODE_USING_GOLDEN ||
1944 ✗ fragment->coding_method == MODE_GOLDEN_MV)
1945 ✗ ref_frame = &s->golden_frame;
1946 else
1947 ✗ ref_frame = &s->last_frame;
1948
1949 ✗ ref_row = y + (motion_y >> 1);
1950 ✗ ref_row = FFMAX(FFABS(ref_row), ref_row + 8 + border);
1951
1952 ✗ ff_progress_frame_await(ref_frame, ref_row);
1953 ✗ }
1954
1955 #if CONFIG_VP4_DECODER
1956 /**
1957 * @return non-zero if temp (edge_emu_buffer) was populated
1958 */
1959 36568 static int vp4_mc_loop_filter(Vp3DecodeContext *s, int plane, int motion_x, int motion_y, int bx, int by,
1960 const uint8_t *motion_source, ptrdiff_t stride,
1961 int src_x, int src_y, uint8_t *temp)
1962 {
1963
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 36568 int motion_shift = plane ? 4 : 2;
1964
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 36568 int subpel_mask = plane ? 3 : 1;
1965 36568 int *bounding_values = s->bounding_values_array + 127;
1966
1967 int x, y;
1968 int x2, y2;
1969 int x_subpel, y_subpel;
1970 int x_offset, y_offset;
1971
1972
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 36568 int block_width = plane ? 8 : 16;
1973
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 36568 int plane_width = s->width >> (plane && s->chroma_x_shift);
1974
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 36568 int plane_height = s->height >> (plane && s->chroma_y_shift);
1975
1976 #define loop_stride 12
1977 uint8_t loop[12 * loop_stride];
1978
1979 /* using division instead of shift to correctly handle negative values */
1980 36568 x = 8 * bx + motion_x / motion_shift;
1981 36568 y = 8 * by + motion_y / motion_shift;
1982
1983 36568 x_subpel = motion_x & subpel_mask;
1984 36568 y_subpel = motion_y & subpel_mask;
1985
1986
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 36568 if (x_subpel || y_subpel) {
1987 30063 x--;
1988 30063 y--;
1989
1990
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 30063 if (x_subpel)
1991
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 22774 x = FFMIN(x, x + FFSIGN(motion_x));
1992
1993
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 30063 if (y_subpel)
1994
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 15343 y = FFMIN(y, y + FFSIGN(motion_y));
1995
1996 30063 x2 = x + block_width;
1997 30063 y2 = y + block_width;
1998
1999
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✓ Branch 6 taken 290 times.
✓ Branch 7 taken 29467 times.
 30063 if (x2 < 0 || x2 >= plane_width || y2 < 0 || y2 >= plane_height)
2000 596 return 0;
2001
2002 29467 x_offset = (-(x + 2) & 7) + 2;
2003 29467 y_offset = (-(y + 2) & 7) + 2;
2004
2005 av_assert1(!(x_offset > 8 + x_subpel && y_offset > 8 + y_subpel));
2006
2007 29467 s->vdsp.emulated_edge_mc(loop, motion_source - stride - 1,
2008 loop_stride, stride,
2009 12, 12, src_x - 1, src_y - 1,
2010 plane_width,
2011 plane_height);
2012
2013
2/2
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 29467 if (x_offset <= 8 + x_subpel)
2014 25000 ff_vp3dsp_h_loop_filter_12(loop + x_offset, loop_stride, bounding_values);
2015
2016
2/2
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 29467 if (y_offset <= 8 + y_subpel)
2017 17032 ff_vp3dsp_v_loop_filter_12(loop + y_offset*loop_stride, loop_stride, bounding_values);
2018
2019 } else {
2020
2021 6505 x_offset = -x & 7;
2022 6505 y_offset = -y & 7;
2023
2024
4/4
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✓ Branch 3 taken 716 times.
 6505 if (!x_offset && !y_offset)
2025 118 return 0;
2026
2027 6387 s->vdsp.emulated_edge_mc(loop, motion_source - stride - 1,
2028 loop_stride, stride,
2029 12, 12, src_x - 1, src_y - 1,
2030 plane_width,
2031 plane_height);
2032
2033 #define safe_loop_filter(name, ptr, stride, bounding_values) \
2034 if (VP3_LOOP_FILTER_NO_UNALIGNED_SUPPORT && (uintptr_t)(ptr) & 7) \
2035 s->vp3dsp.name##_unaligned(ptr, stride, bounding_values); \
2036 else \
2037 s->vp3dsp.name(ptr, stride, bounding_values);
2038
2039
2/2
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 6387 if (x_offset)
2040 5671 safe_loop_filter(h_loop_filter, loop + loop_stride + x_offset + 1, loop_stride, bounding_values);
2041
2042
2/2
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 6387 if (y_offset)
2043 3055 safe_loop_filter(v_loop_filter, loop + (y_offset + 1)*loop_stride + 1, loop_stride, bounding_values);
2044 }
2045
2046
2/2
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 358540 for (int i = 0; i < 9; i++)
2047 322686 memcpy(temp + i*stride, loop + (i + 1) * loop_stride + 1, 9);
2048
2049 35854 return 1;
2050 }
2051 #endif
2052
2053 /*
2054 * Perform the final rendering for a particular slice of data.
2055 * The slice number ranges from 0..(c_superblock_height - 1).
2056 */
2057 1068 static void render_slice(Vp3DecodeContext *s, int slice)
2058 {
2059 1068 int16_t *block = s->block;
2060 1068 int motion_x = 0xdeadbeef, motion_y = 0xdeadbeef;
2061 /* When decoding keyframes, the earlier frames may not be available,
2062 * so we just use the current frame in this case instead;
2063 * it also avoid using undefined pointer arithmetic. Nothing is
2064 * ever read from these frames in case of a keyframe. */
2065
2/2
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 1068 const AVFrame *last_frame = s->last_frame.f ?
2066 s->last_frame.f : s->current_frame.f;
2067
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 1068 const AVFrame *golden_frame = s->golden_frame.f ?
2068 s->golden_frame.f : s->current_frame.f;
2069 int motion_halfpel_index;
2070 int first_pixel;
2071
2072
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 1068 if (slice >= s->c_superblock_height)
2073 ✗ return;
2074
2075
2/2
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 4272 for (int plane = 0; plane < 3; plane++) {
2076 3204 uint8_t *output_plane = s->current_frame.f->data[plane] +
2077 3204 s->data_offset[plane];
2078 3204 const uint8_t *last_plane = last_frame->data[plane] +
2079 3204 s->data_offset[plane];
2080 3204 const uint8_t *golden_plane = golden_frame->data[plane] +
2081 3204 s->data_offset[plane];
2082 3204 ptrdiff_t stride = s->current_frame.f->linesize[plane];
2083
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 3204 int plane_width = s->width >> (plane && s->chroma_x_shift);
2084
3/4
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 3204 int plane_height = s->height >> (plane && s->chroma_y_shift);
2085 3204 const int8_t (*motion_val)[2] = s->motion_val[!!plane];
2086
2087
3/4
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 3204 int sb_y = slice << (!plane && s->chroma_y_shift);
2088
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 3204 int slice_height = sb_y + 1 + (!plane && s->chroma_y_shift);
2089 3204 int slice_width = plane ? s->c_superblock_width
2090
2/2
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✓ Branch 1 taken 1068 times.
 3204 : s->y_superblock_width;
2091
2092 3204 int fragment_width = s->fragment_width[!!plane];
2093 3204 int fragment_height = s->fragment_height[!!plane];
2094 3204 int fragment_start = s->fragment_start[plane];
2095
2096
2/2
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 4272 int do_await = !plane && HAVE_THREADS &&
2097
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 1068 (s->avctx->active_thread_type & FF_THREAD_FRAME);
2098
2099
1/2
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 3204 if (!s->flipped_image)
2100 3204 stride = -stride;
2101 if (CONFIG_GRAY && plane && (s->avctx->flags & AV_CODEC_FLAG_GRAY))
2102 continue;
2103
2104 /* for each superblock row in the slice (both of them)... */
2105
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 7476 for (; sb_y < slice_height; sb_y++) {
2106 /* for each superblock in a row... */
2107
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 129560 for (int sb_x = 0; sb_x < slice_width; sb_x++) {
2108 /* for each block in a superblock... */
2109
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 2129896 for (int j = 0; j < 16; j++) {
2110 2004608 int x = 4 * sb_x + hilbert_offset[j][0];
2111 2004608 int y = 4 * sb_y + hilbert_offset[j][1];
2112 2004608 int fragment = y * fragment_width + x;
2113
2114 2004608 int i = fragment_start + fragment;
2115
2116 // bounds check
2117
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 2004608 if (x >= fragment_width || y >= fragment_height)
2118 156416 continue;
2119
2120 1848192 first_pixel = 8 * y * stride + 8 * x;
2121
2122
1/2
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✓ Branch 1 taken 1848192 times.
 1848192 if (do_await &&
2123 ✗ s->all_fragments[i].coding_method != MODE_INTRA)
2124 ✗ await_reference_row(s, &s->all_fragments[i],
2125 ✗ motion_val[fragment][1],
2126 ✗ (16 * y) >> s->chroma_y_shift);
2127
2128 /* transform if this block was coded */
2129
2/2
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✓ Branch 1 taken 1252364 times.
 1848192 if (s->all_fragments[i].coding_method != MODE_COPY) {
2130 const uint8_t *motion_source;
2131
2/2
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✓ Branch 1 taken 3646 times.
 595828 if ((s->all_fragments[i].coding_method == MODE_USING_GOLDEN) ||
2132
2/2
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✓ Branch 1 taken 588143 times.
 592182 (s->all_fragments[i].coding_method == MODE_GOLDEN_MV))
2133 7685 motion_source = golden_plane;
2134 else
2135 588143 motion_source = last_plane;
2136
2137 595828 motion_source += first_pixel;
2138 595828 motion_halfpel_index = 0;
2139
2140 /* sort out the motion vector if this fragment is coded
2141 * using a motion vector method */
2142
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✓ Branch 1 taken 217992 times.
 595828 if ((s->all_fragments[i].coding_method > MODE_INTRA) &&
2143
2/2
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✓ Branch 1 taken 3646 times.
 377836 (s->all_fragments[i].coding_method != MODE_USING_GOLDEN)) {
2144 int src_x, src_y;
2145 374190 int standard_mc = 1;
2146 374190 motion_x = motion_val[fragment][0];
2147 374190 motion_y = motion_val[fragment][1];
2148 #if CONFIG_VP4_DECODER
2149
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 374190 if (plane && s->version >= 2) {
2150 11931 motion_x = (motion_x >> 1) | (motion_x & 1);
2151 11931 motion_y = (motion_y >> 1) | (motion_y & 1);
2152 }
2153 #endif
2154
2155 374190 src_x = (motion_x >> 1) + 8 * x;
2156 374190 src_y = (motion_y >> 1) + 8 * y;
2157
2158 374190 motion_halfpel_index = motion_x & 0x01;
2159 374190 motion_source += (motion_x >> 1);
2160
2161 374190 motion_halfpel_index |= (motion_y & 0x01) << 1;
2162 374190 motion_source += ((motion_y >> 1) * stride);
2163
2164 #if CONFIG_VP4_DECODER
2165
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 374190 if (s->version >= 2) {
2166 36568 uint8_t *temp = s->edge_emu_buffer;
2167
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✗ Branch 1 not taken.
 36568 if (stride < 0)
2168 36568 temp -= 8 * stride;
2169
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 36568 if (vp4_mc_loop_filter(s, plane, motion_val[fragment][0], motion_val[fragment][1], x, y, motion_source, stride, src_x, src_y, temp)) {
2170 35854 motion_source = temp;
2171 35854 standard_mc = 0;
2172 }
2173 }
2174 #endif
2175
2176
4/4
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 374190 if (standard_mc && (
2177
2/2
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 336975 src_x < 0 || src_y < 0 ||
2178
2/2
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 322220 src_x + 9 >= plane_width ||
2179
2/2
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✓ Branch 1 taken 303550 times.
 315161 src_y + 9 >= plane_height)) {
2180 34786 uint8_t *temp = s->edge_emu_buffer;
2181
1/2
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✗ Branch 1 not taken.
 34786 if (stride < 0)
2182 34786 temp -= 8 * stride;
2183
2184 34786 s->vdsp.emulated_edge_mc(temp, motion_source,
2185 stride, stride,
2186 9, 9, src_x, src_y,
2187 plane_width,
2188 plane_height);
2189 34786 motion_source = temp;
2190 }
2191 }
2192
2193 /* first, take care of copying a block from either the
2194 * previous or the golden frame */
2195
2/2
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 595828 if (s->all_fragments[i].coding_method != MODE_INTRA) {
2196 /* Note, it is possible to implement all MC cases
2197 * with put_no_rnd_pixels_l2 which would look more
2198 * like the VP3 source but this would be slower as
2199 * put_no_rnd_pixels_tab is better optimized */
2200
2/2
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 411494 if (motion_halfpel_index != 3) {
2201 293916 s->hdsp.put_no_rnd_pixels_tab[1][motion_halfpel_index](
2202 output_plane + first_pixel,
2203 motion_source, stride, 8);
2204 } else {
2205 /* d is 0 if motion_x and _y have the same sign,
2206 * else -1 */
2207 117578 int d = (motion_x ^ motion_y) >> 31;
2208 117578 s->vp3dsp.put_no_rnd_pixels_l2(output_plane + first_pixel,
2209 117578 motion_source - d,
2210 117578 motion_source + stride + 1 + d,
2211 stride, 8);
2212 }
2213 }
2214
2215 /* invert DCT and place (or add) in final output */
2216
2217
2/2
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 595828 if (s->all_fragments[i].coding_method == MODE_INTRA) {
2218 184334 vp3_dequant(s, s->all_fragments + i,
2219 plane, 0, block);
2220 184334 s->vp3dsp.idct_put(output_plane + first_pixel,
2221 stride,
2222 block);
2223 } else {
2224
2/2
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✓ Branch 2 taken 127148 times.
 411494 if (vp3_dequant(s, s->all_fragments + i,
2225 plane, 1, block)) {
2226 284346 s->vp3dsp.idct_add(output_plane + first_pixel,
2227 stride,
2228 block);
2229 } else {
2230 127148 s->vp3dsp.idct_dc_add(output_plane + first_pixel,
2231 stride, block);
2232 }
2233 }
2234 } else {
2235 /* copy directly from the previous frame */
2236 1252364 s->hdsp.put_pixels_tab[1][0](
2237 output_plane + first_pixel,
2238 last_plane + first_pixel,
2239 stride, 8);
2240 }
2241 }
2242 }
2243
2244 // Filter up to the last row in the superblock row
2245
4/4
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✓ Branch 3 taken 1608 times.
 4272 if (s->version < 2 && !s->skip_loop_filter)
2246 2280 apply_loop_filter(s, plane, 4 * sb_y - !!sb_y,
2247
2/2
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✓ Branch 1 taken 1824 times.
 2280 FFMIN(4 * sb_y + 3, fragment_height - 1));
2248 }
2249 }
2250
2251 /* this looks like a good place for slice dispatch... */
2252 /* algorithm:
2253 * if (slice == s->macroblock_height - 1)
2254 * dispatch (both last slice & 2nd-to-last slice);
2255 * else if (slice > 0)
2256 * dispatch (slice - 1);
2257 */
2258
2259
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 1068 vp3_draw_horiz_band(s, FFMIN((32 << s->chroma_y_shift) * (slice + 1) - 16,
2260 s->height - 16));
2261 }
2262
2263 11 static av_cold void init_tables_once(void)
2264 {
2265 11 VLCInitState state = VLC_INIT_STATE(mode_code_vlc);
2266
2267 11 VLC_INIT_STATIC_TABLE_FROM_LENGTHS(superblock_run_length_vlc,
2268 SUPERBLOCK_VLC_BITS, 34,
2269 superblock_run_length_vlc_lens, 1,
2270 NULL, 0, 0, 1, 0);
2271
2272 11 VLC_INIT_STATIC_TABLE_FROM_LENGTHS(fragment_run_length_vlc, 5, 30,
2273 fragment_run_length_vlc_len, 1,
2274 NULL, 0, 0, 0, 0);
2275
2276 11 VLC_INIT_STATIC_TABLE_FROM_LENGTHS(motion_vector_vlc, VP3_MV_VLC_BITS, 63,
2277 &motion_vector_vlc_table[0][1], 2,
2278 &motion_vector_vlc_table[0][0], 2, 1,
2279 -31, 0);
2280
2281 11 ff_vlc_init_tables_from_lengths(&state, 4, 8,
2282 mode_code_vlc_len, 1,
2283 NULL, 0, 0, 0, 0);
2284
2285 #if CONFIG_VP4_DECODER
2286
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 33 for (int j = 0; j < 2; j++)
2287
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 176 for (int i = 0; i < 7; i++) {
2288 154 vp4_mv_vlc_table[j][i] =
2289 154 ff_vlc_init_tables_from_lengths(&state, VP4_MV_VLC_BITS, 63,
2290 154 &vp4_mv_vlc[j][i][0][1], 2,
2291 154 &vp4_mv_vlc[j][i][0][0], 2, 1,
2292 -31, 0);
2293 }
2294
2295 /* version >= 2 */
2296
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 33 for (int i = 0; i < 2; i++) {
2297 22 block_pattern_vlc[i] =
2298 22 ff_vlc_init_tables(&state, 5, 14,
2299 22 &vp4_block_pattern_vlc[i][0][1], 2, 1,
2300 22 &vp4_block_pattern_vlc[i][0][0], 2, 1, 0);
2301 }
2302 #endif
2303 11 }
2304
2305 /// Allocate tables for per-frame data in Vp3DecodeContext
2306 35 static av_cold int allocate_tables(AVCodecContext *avctx)
2307 {
2308 35 Vp3DecodeContext *s = avctx->priv_data;
2309 int y_fragment_count, c_fragment_count;
2310
2311 35 free_tables(avctx);
2312
2313 35 y_fragment_count = s->fragment_width[0] * s->fragment_height[0];
2314 35 c_fragment_count = s->fragment_width[1] * s->fragment_height[1];
2315
2316 /* superblock_coding is used by unpack_superblocks (VP3/Theora) and vp4_unpack_macroblocks (VP4) */
2317 35 s->superblock_coding = av_mallocz(FFMAX(s->superblock_count, s->yuv_macroblock_count));
2318 35 s->all_fragments = av_calloc(s->fragment_count, sizeof(*s->all_fragments));
2319
2320 35 s-> kf_coded_fragment_list = av_calloc(s->fragment_count, sizeof(int));
2321 35 s->nkf_coded_fragment_list = av_calloc(s->fragment_count, sizeof(int));
2322 35 memset(s-> num_kf_coded_fragment, -1, sizeof(s-> num_kf_coded_fragment));
2323
2324 35 s->dct_tokens_base = av_calloc(s->fragment_count,
2325 64 * sizeof(*s->dct_tokens_base));
2326 35 s->motion_val[0] = av_calloc(y_fragment_count, sizeof(*s->motion_val[0]));
2327 35 s->motion_val[1] = av_calloc(c_fragment_count, sizeof(*s->motion_val[1]));
2328
2329 /* work out the block mapping tables */
2330 35 s->superblock_fragments = av_calloc(s->superblock_count, 16 * sizeof(int));
2331 35 s->macroblock_coding = av_mallocz(s->macroblock_count + 1);
2332
2333 35 s->dc_pred_row = av_malloc_array(s->y_superblock_width * 4, sizeof(*s->dc_pred_row));
2334
2335
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 35 if (!s->superblock_coding || !s->all_fragments ||
2336
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 35 !s->dct_tokens_base || !s->kf_coded_fragment_list ||
2337
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 35 !s->nkf_coded_fragment_list ||
2338
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 35 !s->superblock_fragments || !s->macroblock_coding ||
2339
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 35 !s->dc_pred_row ||
2340
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 35 !s->motion_val[0] || !s->motion_val[1]) {
2341 ✗ return -1;
2342 }
2343
2344 35 init_block_mapping(s);
2345
2346 35 return 0;
2347 }
2348
2349
2350 35 static av_cold void free_vlc_tables(AVRefStructOpaque unused, void *obj)
2351 {
2352 35 CoeffVLCs *vlcs = obj;
2353
2354
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 2835 for (int i = 0; i < FF_ARRAY_ELEMS(vlcs->vlcs); i++)
2355 2800 ff_vlc_free(&vlcs->vlcs[i]);
2356 35 }
2357
2358 35 static av_cold int vp3_decode_init(AVCodecContext *avctx)
2359 {
2360 static AVOnce init_static_once = AV_ONCE_INIT;
2361 35 Vp3DecodeContext *s = avctx->priv_data;
2362 int ret;
2363 int c_width;
2364 int c_height;
2365 int y_fragment_count, c_fragment_count;
2366
2367
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 35 if (avctx->codec_tag == MKTAG('V', 'P', '4', '0')) {
2368 2 s->version = 3;
2369 #if !CONFIG_VP4_DECODER
2370 av_log(avctx, AV_LOG_ERROR, "This build does not support decoding VP4.\n");
2371 return AVERROR_DECODER_NOT_FOUND;
2372 #endif
2373
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 33 } else if (avctx->codec_tag == MKTAG('V', 'P', '3', '0'))
2374 ✗ s->version = 0;
2375 else
2376 33 s->version = 1;
2377
2378 35 s->avctx = avctx;
2379 35 s->width = FFALIGN(avctx->coded_width, 16);
2380 35 s->height = FFALIGN(avctx->coded_height, 16);
2381
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 35 if (s->width < 18)
2382 ✗ return AVERROR_PATCHWELCOME;
2383
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 35 if (avctx->codec_id != AV_CODEC_ID_THEORA)
2384 5 avctx->pix_fmt = AV_PIX_FMT_YUV420P;
2385 35 avctx->chroma_sample_location = AVCHROMA_LOC_CENTER;
2386 35 ff_hpeldsp_init(&s->hdsp, avctx->flags | AV_CODEC_FLAG_BITEXACT);
2387 35 ff_videodsp_init(&s->vdsp, 8);
2388 35 ff_vp3dsp_init(&s->vp3dsp);
2389
2390
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 2275 for (int i = 0; i < 64; i++) {
2391 #define TRANSPOSE(x) (((x) >> 3) | (((x) & 7) << 3))
2392 2240 s->idct_permutation[i] = TRANSPOSE(i);
2393 2240 s->idct_scantable[i] = TRANSPOSE(ff_zigzag_direct[i]);
2394 #undef TRANSPOSE
2395 }
2396
2397 /* initialize to an impossible value which will force a recalculation
2398 * in the first frame decode */
2399
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 140 for (int i = 0; i < 3; i++)
2400 105 s->qps[i] = -1;
2401
2402 35 ret = av_pix_fmt_get_chroma_sub_sample(avctx->pix_fmt, &s->chroma_x_shift, &s->chroma_y_shift);
2403
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 35 if (ret)
2404 ✗ return ret;
2405
2406 35 s->y_superblock_width = (s->width + 31) / 32;
2407 35 s->y_superblock_height = (s->height + 31) / 32;
2408 35 s->y_superblock_count = s->y_superblock_width * s->y_superblock_height;
2409
2410 /* work out the dimensions for the C planes */
2411 35 c_width = s->width >> s->chroma_x_shift;
2412 35 c_height = s->height >> s->chroma_y_shift;
2413 35 s->c_superblock_width = (c_width + 31) / 32;
2414 35 s->c_superblock_height = (c_height + 31) / 32;
2415 35 s->c_superblock_count = s->c_superblock_width * s->c_superblock_height;
2416
2417 35 s->superblock_count = s->y_superblock_count + (s->c_superblock_count * 2);
2418 35 s->u_superblock_start = s->y_superblock_count;
2419 35 s->v_superblock_start = s->u_superblock_start + s->c_superblock_count;
2420
2421 35 s->macroblock_width = (s->width + 15) / 16;
2422 35 s->macroblock_height = (s->height + 15) / 16;
2423 35 s->macroblock_count = s->macroblock_width * s->macroblock_height;
2424 35 s->c_macroblock_width = (c_width + 15) / 16;
2425 35 s->c_macroblock_height = (c_height + 15) / 16;
2426 35 s->c_macroblock_count = s->c_macroblock_width * s->c_macroblock_height;
2427 35 s->yuv_macroblock_count = s->macroblock_count + 2 * s->c_macroblock_count;
2428
2429 35 s->fragment_width[0] = s->width / FRAGMENT_PIXELS;
2430 35 s->fragment_height[0] = s->height / FRAGMENT_PIXELS;
2431 35 s->fragment_width[1] = s->fragment_width[0] >> s->chroma_x_shift;
2432 35 s->fragment_height[1] = s->fragment_height[0] >> s->chroma_y_shift;
2433
2434 /* fragment count covers all 8x8 blocks for all 3 planes */
2435 35 y_fragment_count = s->fragment_width[0] * s->fragment_height[0];
2436 35 c_fragment_count = s->fragment_width[1] * s->fragment_height[1];
2437 35 s->fragment_count = y_fragment_count + 2 * c_fragment_count;
2438 35 s->fragment_start[1] = y_fragment_count;
2439 35 s->fragment_start[2] = y_fragment_count + c_fragment_count;
2440
2441
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 35 if (!s->theora_tables) {
2442
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 325 for (int i = 0; i < 64; i++) {
2443
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 320 s->coded_dc_scale_factor[0][i] = s->version < 2 ? vp31_dc_scale_factor[i] : vp4_y_dc_scale_factor[i];
2444
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 320 s->coded_dc_scale_factor[1][i] = s->version < 2 ? vp31_dc_scale_factor[i] : vp4_uv_dc_scale_factor[i];
2445
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 320 s->coded_ac_scale_factor[i] = s->version < 2 ? vp31_ac_scale_factor[i] : vp4_ac_scale_factor[i];
2446
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 320 s->base_matrix[0][i] = s->version < 2 ? vp31_intra_y_dequant[i] : vp4_generic_dequant[i];
2447
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 320 s->base_matrix[1][i] = s->version < 2 ? ff_mjpeg_std_chrominance_quant_tbl[i] : vp4_generic_dequant[i];
2448
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 320 s->base_matrix[2][i] = s->version < 2 ? vp31_inter_dequant[i] : vp4_generic_dequant[i];
2449
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 320 s->filter_limit_values[i] = s->version < 2 ? vp31_filter_limit_values[i] : vp4_filter_limit_values[i];
2450 }
2451
2452
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 15 for (int inter = 0; inter < 2; inter++) {
2453
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 40 for (int plane = 0; plane < 3; plane++) {
2454 30 s->qr_count[inter][plane] = 1;
2455 30 s->qr_size[inter][plane][0] = 63;
2456 30 s->qr_base[inter][plane][0] =
2457 30 s->qr_base[inter][plane][1] = 2 * inter + (!!plane) * !inter;
2458 }
2459 }
2460 }
2461
2462
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 35 if (!avctx->internal->is_copy) {
2463 35 CoeffVLCs *vlcs = av_refstruct_alloc_ext(sizeof(*s->coeff_vlc), 0,
2464 NULL, free_vlc_tables);
2465
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 35 if (!vlcs)
2466 ✗ return AVERROR(ENOMEM);
2467
2468 35 s->coeff_vlc = vlcs;
2469
2470
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 35 if (!s->theora_tables) {
2471 const uint8_t (*bias_tabs)[32][2];
2472
2473 /* init VLC tables */
2474
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 5 bias_tabs = CONFIG_VP4_DECODER && s->version >= 2 ? vp4_bias : vp3_bias;
2475
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 405 for (int i = 0; i < FF_ARRAY_ELEMS(vlcs->vlcs); i++) {
2476 400 ret = ff_vlc_init_from_lengths(&vlcs->vlcs[i], 11, 32,
2477 400 &bias_tabs[i][0][1], 2,
2478 400 &bias_tabs[i][0][0], 2, 1,
2479 0, 0, avctx);
2480
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 400 if (ret < 0)
2481 ✗ return ret;
2482 400 vlcs->vlc_tabs[i] = vlcs->vlcs[i].table;
2483 }
2484 } else {
2485
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 2430 for (int i = 0; i < FF_ARRAY_ELEMS(vlcs->vlcs); i++) {
2486 2400 const HuffTable *tab = &s->huffman_table[i];
2487
2488 2400 ret = ff_vlc_init_from_lengths(&vlcs->vlcs[i], 11, tab->nb_entries,
2489 2400 &tab->entries[0].len, sizeof(*tab->entries),
2490 2400 &tab->entries[0].sym, sizeof(*tab->entries), 1,
2491 0, 0, avctx);
2492
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 2400 if (ret < 0)
2493 ✗ return ret;
2494 2400 vlcs->vlc_tabs[i] = vlcs->vlcs[i].table;
2495 }
2496 }
2497 }
2498
2499 35 ff_thread_once(&init_static_once, init_tables_once);
2500
2501 35 return allocate_tables(avctx);
2502 }
2503
2504 /// Release and shuffle frames after decode finishes
2505 164 static void update_frames(AVCodecContext *avctx)
2506 {
2507 164 Vp3DecodeContext *s = avctx->priv_data;
2508
2509
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 164 if (s->keyframe)
2510 6 ff_progress_frame_replace(&s->golden_frame, &s->current_frame);
2511
2512 /* shuffle frames */
2513 164 ff_progress_frame_unref(&s->last_frame);
2514 164 FFSWAP(ProgressFrame, s->last_frame, s->current_frame);
2515 164 }
2516
2517 #if HAVE_THREADS
2518 ✗ static void ref_frames(Vp3DecodeContext *dst, const Vp3DecodeContext *src)
2519 {
2520 ✗ ff_progress_frame_replace(&dst->current_frame, &src->current_frame);
2521 ✗ ff_progress_frame_replace(&dst->golden_frame, &src->golden_frame);
2522 ✗ ff_progress_frame_replace(&dst->last_frame, &src->last_frame);
2523 ✗ }
2524
2525 ✗ static int vp3_update_thread_context(AVCodecContext *dst, const AVCodecContext *src)
2526 {
2527 ✗ Vp3DecodeContext *s = dst->priv_data;
2528 ✗ const Vp3DecodeContext *s1 = src->priv_data;
2529 ✗ int qps_changed = 0;
2530
2531 ✗ av_refstruct_replace(&s->coeff_vlc, s1->coeff_vlc);
2532
2533 // copy previous frame data
2534 ✗ ref_frames(s, s1);
2535 ✗ if (!s1->current_frame.f ||
2536 ✗ s->width != s1->width || s->height != s1->height) {
2537 ✗ return -1;
2538 }
2539
2540 ✗ if (s != s1) {
2541 ✗ s->keyframe = s1->keyframe;
2542
2543 // copy qscale data if necessary
2544 ✗ for (int i = 0; i < 3; i++) {
2545 ✗ if (s->qps[i] != s1->qps[1]) {
2546 ✗ qps_changed = 1;
2547 ✗ memcpy(&s->qmat[i], &s1->qmat[i], sizeof(s->qmat[i]));
2548 }
2549 }
2550
2551 ✗ if (s->qps[0] != s1->qps[0])
2552 ✗ memcpy(&s->bounding_values_array, &s1->bounding_values_array,
2553 sizeof(s->bounding_values_array));
2554
2555 ✗ if (qps_changed) {
2556 ✗ memcpy(s->qps, s1->qps, sizeof(s->qps));
2557 ✗ memcpy(s->last_qps, s1->last_qps, sizeof(s->last_qps));
2558 ✗ s->nqps = s1->nqps;
2559 }
2560 }
2561
2562 ✗ update_frames(dst);
2563 ✗ return 0;
2564 }
2565 #endif
2566
2567 164 static int vp3_decode_frame(AVCodecContext *avctx, AVFrame *frame,
2568 int *got_frame, AVPacket *avpkt)
2569 {
2570 164 const uint8_t *buf = avpkt->data;
2571 164 int buf_size = avpkt->size;
2572 164 Vp3DecodeContext *s = avctx->priv_data;
2573 GetBitContext gb;
2574 int ret;
2575
2576
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 164 if ((ret = init_get_bits8(&gb, buf, buf_size)) < 0)
2577 ✗ return ret;
2578
2579 #if CONFIG_THEORA_DECODER
2580
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 164 if (s->theora && get_bits1(&gb)) {
2581 ✗ int type = get_bits(&gb, 7);
2582 ✗ skip_bits_long(&gb, 6*8); /* "theora" */
2583
2584 ✗ if (s->avctx->active_thread_type&FF_THREAD_FRAME) {
2585 ✗ av_log(avctx, AV_LOG_ERROR, "midstream reconfiguration with multithreading is unsupported, try -threads 1\n");
2586 ✗ return AVERROR_PATCHWELCOME;
2587 }
2588 ✗ if (type == 0) {
2589 ✗ vp3_decode_end(avctx);
2590 ✗ ret = theora_decode_header(avctx, &gb);
2591
2592 ✗ if (ret >= 0)
2593 ✗ ret = vp3_decode_init(avctx);
2594 ✗ if (ret < 0) {
2595 ✗ vp3_decode_end(avctx);
2596 ✗ return ret;
2597 }
2598 ✗ return buf_size;
2599 ✗ } else if (type == 2) {
2600 ✗ vp3_decode_end(avctx);
2601 ✗ ret = theora_decode_tables(avctx, &gb);
2602 ✗ if (ret >= 0)
2603 ✗ ret = vp3_decode_init(avctx);
2604 ✗ if (ret < 0) {
2605 ✗ vp3_decode_end(avctx);
2606 ✗ return ret;
2607 }
2608 ✗ return buf_size;
2609 }
2610
2611 ✗ av_log(avctx, AV_LOG_ERROR,
2612 "Header packet passed to frame decoder, skipping\n");
2613 ✗ return -1;
2614 }
2615 #endif
2616
2617 164 s->keyframe = !get_bits1(&gb);
2618
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 164 if (!s->all_fragments) {
2619 ✗ av_log(avctx, AV_LOG_ERROR, "Data packet without prior valid headers\n");
2620 ✗ return -1;
2621 }
2622
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 164 if (!s->theora)
2623 138 skip_bits(&gb, 1);
2624
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 656 for (int i = 0; i < 3; i++)
2625 492 s->last_qps[i] = s->qps[i];
2626
2627 164 s->nqps = 0;
2628 do {
2629 164 s->qps[s->nqps++] = get_bits(&gb, 6);
2630
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 164 } while (s->theora >= 0x030200 && s->nqps < 3 && get_bits1(&gb));
2631
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 492 for (int i = s->nqps; i < 3; i++)
2632 328 s->qps[i] = -1;
2633
2634
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 164 if (s->avctx->debug & FF_DEBUG_PICT_INFO)
2635 ✗ av_log(s->avctx, AV_LOG_INFO, " VP3 %sframe #%"PRId64": Q index = %d\n",
2636 ✗ s->keyframe ? "key" : "", avctx->frame_num + 1, s->qps[0]);
2637
2638
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 302 s->skip_loop_filter = !s->filter_limit_values[s->qps[0]] ||
2639 138 avctx->skip_loop_filter >= (s->keyframe ? AVDISCARD_ALL
2640
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 138 : AVDISCARD_NONKEY);
2641
2642
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 164 if (s->qps[0] != s->last_qps[0])
2643 62 init_loop_filter(s);
2644
2645
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 328 for (int i = 0; i < s->nqps; i++)
2646 // reinit all dequantizers if the first one changed, because
2647 // the DC of the first quantizer must be used for all matrices
2648
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 164 if (s->qps[i] != s->last_qps[i] || s->qps[0] != s->last_qps[0])
2649 62 init_dequantizer(s, i);
2650
2651
1/4
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 164 if (avctx->skip_frame >= AVDISCARD_NONKEY && !s->keyframe)
2652 ✗ return buf_size;
2653
2654 164 ff_progress_frame_unref(&s->current_frame);
2655 164 ret = ff_progress_frame_get_buffer(avctx, &s->current_frame,
2656 AV_GET_BUFFER_FLAG_REF);
2657
1/2
✗ Branch 0 not taken.
✓ Branch 1 taken 164 times.
 164 if (ret < 0) {
2658 // Don't goto error here, as one can't report progress on or
2659 // unref a non-existent frame.
2660 ✗ return ret;
2661 }
2662 328 s->current_frame.f->pict_type = s->keyframe ? AV_PICTURE_TYPE_I
2663
2/2
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✓ Branch 1 taken 158 times.
 164 : AV_PICTURE_TYPE_P;
2664
2/2
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✓ Branch 1 taken 158 times.
 164 if (s->keyframe)
2665 6 s->current_frame.f->flags |= AV_FRAME_FLAG_KEY;
2666 else
2667 158 s->current_frame.f->flags &= ~AV_FRAME_FLAG_KEY;
2668
2669
2/2
✓ Branch 0 taken 5 times.
✓ Branch 1 taken 159 times.
 164 if (!s->edge_emu_buffer) {
2670 5 s->edge_emu_buffer = av_malloc(9 * FFABS(s->current_frame.f->linesize[0]));
2671
1/2
✗ Branch 0 not taken.
✓ Branch 1 taken 5 times.
 5 if (!s->edge_emu_buffer) {
2672 ✗ ret = AVERROR(ENOMEM);
2673 ✗ goto error;
2674 }
2675 }
2676
2677
2/2
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✓ Branch 1 taken 158 times.
 164 if (s->keyframe) {
2678
2/2
✓ Branch 0 taken 3 times.
✓ Branch 1 taken 3 times.
 6 if (!s->theora) {
2679 3 skip_bits(&gb, 4); /* width code */
2680 3 skip_bits(&gb, 4); /* height code */
2681
1/2
✓ Branch 0 taken 3 times.
✗ Branch 1 not taken.
 3 if (s->version) {
2682 3 int version = get_bits(&gb, 5);
2683 #if !CONFIG_VP4_DECODER
2684 if (version >= 2) {
2685 av_log(avctx, AV_LOG_ERROR, "This build does not support decoding VP4.\n");
2686 return AVERROR_DECODER_NOT_FOUND;
2687 }
2688 #endif
2689 3 s->version = version;
2690
2/2
✓ Branch 0 taken 2 times.
✓ Branch 1 taken 1 times.
 3 if (avctx->frame_num == 0)
2691 2 av_log(s->avctx, AV_LOG_DEBUG,
2692 "VP version: %d\n", s->version);
2693 }
2694 }
2695
1/4
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 6 if (s->version || s->theora) {
2696
1/2
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✓ Branch 2 taken 6 times.
 6 if (get_bits1(&gb))
2697 ✗ av_log(s->avctx, AV_LOG_ERROR,
2698 "Warning, unsupported keyframe coding type?!\n");
2699 6 skip_bits(&gb, 2); /* reserved? */
2700
2701 #if CONFIG_VP4_DECODER
2702
2/2
✓ Branch 0 taken 2 times.
✓ Branch 1 taken 4 times.
 6 if (s->version >= 2) {
2703 int mb_height, mb_width;
2704 int mb_width_mul, mb_width_div, mb_height_mul, mb_height_div;
2705
2706 2 mb_height = get_bits(&gb, 8);
2707 2 mb_width = get_bits(&gb, 8);
2708
1/2
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✗ Branch 1 not taken.
 2 if (mb_height != s->macroblock_height ||
2709
1/2
✗ Branch 0 not taken.
✓ Branch 1 taken 2 times.
 2 mb_width != s->macroblock_width)
2710 ✗ avpriv_request_sample(s->avctx, "macroblock dimension mismatch");
2711
2712 2 mb_width_mul = get_bits(&gb, 5);
2713 2 mb_width_div = get_bits(&gb, 3);
2714 2 mb_height_mul = get_bits(&gb, 5);
2715 2 mb_height_div = get_bits(&gb, 3);
2716
4/8
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✓ Branch 7 taken 2 times.
 2 if (mb_width_mul != 1 || mb_width_div != 1 || mb_height_mul != 1 || mb_height_div != 1)
2717 ✗ avpriv_request_sample(s->avctx, "unexpected macroblock dimension multiplier/divider");
2718
2719
1/2
✗ Branch 1 not taken.
✓ Branch 2 taken 2 times.
 2 if (get_bits(&gb, 2))
2720 ✗ avpriv_request_sample(s->avctx, "unknown bits");
2721 }
2722 #endif
2723 }
2724 } else {
2725
1/2
✗ Branch 0 not taken.
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 158 if (!s->golden_frame.f) {
2726 ✗ av_log(s->avctx, AV_LOG_WARNING,
2727 "vp3: first frame not a keyframe\n");
2728
2729 ✗ if ((ret = ff_progress_frame_get_buffer(avctx, &s->golden_frame,
2730 AV_GET_BUFFER_FLAG_REF)) < 0)
2731 ✗ goto error;
2732 ✗ s->golden_frame.f->pict_type = AV_PICTURE_TYPE_I;
2733 ✗ ff_progress_frame_replace(&s->last_frame, &s->golden_frame);
2734 ✗ ff_progress_frame_report(&s->golden_frame, INT_MAX);
2735 }
2736 }
2737 164 ff_thread_finish_setup(avctx);
2738
2739 164 memset(s->all_fragments, 0, s->fragment_count * sizeof(Vp3Fragment));
2740
2741
2/2
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 164 if (s->version < 2) {
2742
1/2
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 140 if ((ret = unpack_superblocks(s, &gb)) < 0) {
2743 ✗ av_log(s->avctx, AV_LOG_ERROR, "error in unpack_superblocks\n");
2744 ✗ goto error;
2745 }
2746 #if CONFIG_VP4_DECODER
2747 } else {
2748
1/2
✗ Branch 1 not taken.
✓ Branch 2 taken 24 times.
 24 if ((ret = vp4_unpack_macroblocks(s, &gb)) < 0) {
2749 ✗ av_log(s->avctx, AV_LOG_ERROR, "error in vp4_unpack_macroblocks\n");
2750 ✗ goto error;
2751 }
2752 #endif
2753 }
2754
1/2
✗ Branch 1 not taken.
✓ Branch 2 taken 164 times.
 164 if ((ret = unpack_modes(s, &gb)) < 0) {
2755 ✗ av_log(s->avctx, AV_LOG_ERROR, "error in unpack_modes\n");
2756 ✗ goto error;
2757 }
2758
1/2
✗ Branch 1 not taken.
✓ Branch 2 taken 164 times.
 164 if (ret = unpack_vectors(s, &gb)) {
2759 ✗ av_log(s->avctx, AV_LOG_ERROR, "error in unpack_vectors\n");
2760 ✗ goto error;
2761 }
2762
1/2
✗ Branch 1 not taken.
✓ Branch 2 taken 164 times.
 164 if ((ret = unpack_block_qpis(s, &gb)) < 0) {
2763 ✗ av_log(s->avctx, AV_LOG_ERROR, "error in unpack_block_qpis\n");
2764 ✗ goto error;
2765 }
2766
2767
2/2
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✓ Branch 1 taken 24 times.
 164 if (s->version < 2) {
2768
1/2
✗ Branch 1 not taken.
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 140 if ((ret = unpack_dct_coeffs(s, &gb)) < 0) {
2769 ✗ av_log(s->avctx, AV_LOG_ERROR, "error in unpack_dct_coeffs\n");
2770 ✗ goto error;
2771 }
2772 #if CONFIG_VP4_DECODER
2773 } else {
2774
1/2
✗ Branch 1 not taken.
✓ Branch 2 taken 24 times.
 24 if ((ret = vp4_unpack_dct_coeffs(s, &gb)) < 0) {
2775 ✗ av_log(s->avctx, AV_LOG_ERROR, "error in vp4_unpack_dct_coeffs\n");
2776 ✗ goto error;
2777 }
2778 #endif
2779 }
2780
2781
2/2
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✓ Branch 1 taken 164 times.
 656 for (int i = 0; i < 3; i++) {
2782
3/4
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✓ Branch 1 taken 164 times.
✓ Branch 2 taken 328 times.
✗ Branch 3 not taken.
 492 int height = s->height >> (i && s->chroma_y_shift);
2783
1/2
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✓ Branch 1 taken 492 times.
 492 if (s->flipped_image)
2784 ✗ s->data_offset[i] = 0;
2785 else
2786 492 s->data_offset[i] = (height - 1) * s->current_frame.f->linesize[i];
2787 }
2788
2789 164 s->last_slice_end = 0;
2790
2/2
✓ Branch 0 taken 1068 times.
✓ Branch 1 taken 164 times.
 1232 for (int i = 0; i < s->c_superblock_height; i++)
2791 1068 render_slice(s, i);
2792
2793 // filter the last row
2794
2/2
✓ Branch 0 taken 140 times.
✓ Branch 1 taken 24 times.
 164 if (s->version < 2)
2795
2/2
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✓ Branch 1 taken 140 times.
 560 for (int i = 0; i < 3; i++) {
2796
3/4
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✓ Branch 1 taken 140 times.
✓ Branch 2 taken 280 times.
✗ Branch 3 not taken.
 420 int row = (s->height >> (3 + (i && s->chroma_y_shift))) - 1;
2797 420 apply_loop_filter(s, i, row, row + 1);
2798 }
2799 164 vp3_draw_horiz_band(s, s->height);
2800
2801 /* output frame, offset as needed */
2802
1/2
✗ Branch 1 not taken.
✓ Branch 2 taken 164 times.
 164 if ((ret = av_frame_ref(frame, s->current_frame.f)) < 0)
2803 ✗ return ret;
2804
2805 164 frame->crop_left = s->offset_x;
2806 164 frame->crop_right = avctx->coded_width - avctx->width - s->offset_x;
2807 164 frame->crop_top = s->offset_y;
2808 164 frame->crop_bottom = avctx->coded_height - avctx->height - s->offset_y;
2809
2810 164 *got_frame = 1;
2811
2812
1/2
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✗ Branch 1 not taken.
 164 if (!HAVE_THREADS || !(s->avctx->active_thread_type & FF_THREAD_FRAME))
2813 164 update_frames(avctx);
2814
2815 164 return buf_size;
2816
2817 ✗ error:
2818 ✗ ff_progress_frame_report(&s->current_frame, INT_MAX);
2819
2820 ✗ if (!HAVE_THREADS || !(s->avctx->active_thread_type & FF_THREAD_FRAME))
2821 ✗ av_frame_unref(s->current_frame.f);
2822
2823 ✗ return ret;
2824 }
2825
2826 151200 static int read_huffman_tree(HuffTable *huff, GetBitContext *gb, int length,
2827 AVCodecContext *avctx)
2828 {
2829
2/2
✓ Branch 1 taken 76800 times.
✓ Branch 2 taken 74400 times.
 151200 if (get_bits1(gb)) {
2830 int token;
2831
1/2
✗ Branch 0 not taken.
✓ Branch 1 taken 76800 times.
 76800 if (huff->nb_entries >= 32) { /* overflow */
2832 ✗ av_log(avctx, AV_LOG_ERROR, "huffman tree overflow\n");
2833 ✗ return -1;
2834 }
2835 76800 token = get_bits(gb, 5);
2836 ff_dlog(avctx, "code length %d, curr entry %d, token %d\n",
2837 length, huff->nb_entries, token);
2838 76800 huff->entries[huff->nb_entries++] = (HuffEntry){ length, token };
2839 } else {
2840 /* The following bound follows from the fact that nb_entries <= 32. */
2841
1/2
✗ Branch 0 not taken.
✓ Branch 1 taken 74400 times.
 74400 if (length >= 31) { /* overflow */
2842 ✗ av_log(avctx, AV_LOG_ERROR, "huffman tree overflow\n");
2843 ✗ return -1;
2844 }
2845 74400 length++;
2846
1/2
✗ Branch 1 not taken.
✓ Branch 2 taken 74400 times.
 74400 if (read_huffman_tree(huff, gb, length, avctx))
2847 ✗ return -1;
2848
1/2
✗ Branch 1 not taken.
✓ Branch 2 taken 74400 times.
 74400 if (read_huffman_tree(huff, gb, length, avctx))
2849 ✗ return -1;
2850 }
2851 151200 return 0;
2852 }
2853
2854 #if CONFIG_THEORA_DECODER
2855 static const enum AVPixelFormat theora_pix_fmts[4] = {
2856 AV_PIX_FMT_YUV420P, AV_PIX_FMT_NONE, AV_PIX_FMT_YUV422P, AV_PIX_FMT_YUV444P
2857 };
2858
2859 30 static int theora_decode_header(AVCodecContext *avctx, GetBitContext *gb)
2860 {
2861 30 Vp3DecodeContext *s = avctx->priv_data;
2862 int visible_width, visible_height, colorspace;
2863 30 uint8_t offset_x = 0, offset_y = 0;
2864 int ret;
2865 AVRational fps, aspect;
2866
2867
1/2
✗ Branch 1 not taken.
✓ Branch 2 taken 30 times.
 30 if (get_bits_left(gb) < 206)
2868 ✗ return AVERROR_INVALIDDATA;
2869
2870 30 s->theora_header = 0;
2871 30 s->theora = get_bits(gb, 24);
2872 30 av_log(avctx, AV_LOG_DEBUG, "Theora bitstream version %X\n", s->theora);
2873
1/2
✗ Branch 0 not taken.
✓ Branch 1 taken 30 times.
 30 if (!s->theora) {
2874 ✗ s->theora = 1;
2875 ✗ avpriv_request_sample(s->avctx, "theora 0");
2876 }
2877
2878 /* 3.2.0 aka alpha3 has the same frame orientation as original vp3
2879 * but previous versions have the image flipped relative to vp3 */
2880
1/2
✗ Branch 0 not taken.
✓ Branch 1 taken 30 times.
 30 if (s->theora < 0x030200) {
2881 ✗ s->flipped_image = 1;
2882 ✗ av_log(avctx, AV_LOG_DEBUG,
2883 "Old (<alpha3) Theora bitstream, flipped image\n");
2884 }
2885
2886 30 visible_width =
2887 30 s->width = get_bits(gb, 16) << 4;
2888 30 visible_height =
2889 30 s->height = get_bits(gb, 16) << 4;
2890
2891
1/2
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✗ Branch 1 not taken.
 30 if (s->theora >= 0x030200) {
2892 30 visible_width = get_bits(gb, 24);
2893 30 visible_height = get_bits(gb, 24);
2894
2895 30 offset_x = get_bits(gb, 8); /* offset x */
2896 30 offset_y = get_bits(gb, 8); /* offset y, from bottom */
2897 }
2898
2899 /* sanity check */
2900
1/2
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✗ Branch 2 not taken.
 30 if (av_image_check_size(visible_width, visible_height, 0, avctx) < 0 ||
2901
1/2
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✗ Branch 1 not taken.
 30 visible_width + offset_x > s->width ||
2902
2/4
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✗ Branch 1 not taken.
✗ Branch 2 not taken.
✓ Branch 3 taken 30 times.
 30 visible_height + offset_y > s->height ||
2903 visible_width < 18
2904 ) {
2905 ✗ av_log(avctx, AV_LOG_ERROR,
2906 "Invalid frame dimensions - w:%d h:%d x:%d y:%d (%dx%d).\n",
2907 visible_width, visible_height, offset_x, offset_y,
2908 s->width, s->height);
2909 ✗ return AVERROR_INVALIDDATA;
2910 }
2911
2912 30 fps.num = get_bits_long(gb, 32);
2913 30 fps.den = get_bits_long(gb, 32);
2914
2/4
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 30 if (fps.num && fps.den) {
2915
2/4
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✗ Branch 1 not taken.
✗ Branch 2 not taken.
✓ Branch 3 taken 30 times.
 30 if (fps.num < 0 || fps.den < 0) {
2916 ✗ av_log(avctx, AV_LOG_ERROR, "Invalid framerate\n");
2917 ✗ return AVERROR_INVALIDDATA;
2918 }
2919 30 av_reduce(&avctx->framerate.den, &avctx->framerate.num,
2920 30 fps.den, fps.num, 1 << 30);
2921 }
2922
2923 30 aspect.num = get_bits(gb, 24);
2924 30 aspect.den = get_bits(gb, 24);
2925
3/4
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✓ Branch 1 taken 24 times.
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✗ Branch 3 not taken.
 30 if (aspect.num && aspect.den) {
2926 6 av_reduce(&avctx->sample_aspect_ratio.num,
2927 &avctx->sample_aspect_ratio.den,
2928 6 aspect.num, aspect.den, 1 << 30);
2929 6 ff_set_sar(avctx, avctx->sample_aspect_ratio);
2930 }
2931
2932
1/2
✗ Branch 0 not taken.
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 30 if (s->theora < 0x030200)
2933 ✗ skip_bits(gb, 5); /* keyframe frequency force */
2934 30 colorspace = get_bits(gb, 8);
2935 30 skip_bits(gb, 24); /* bitrate */
2936
2937 30 skip_bits(gb, 6); /* quality hint */
2938
2939
1/2
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✗ Branch 1 not taken.
 30 if (s->theora >= 0x030200) {
2940 30 skip_bits(gb, 5); /* keyframe frequency force */
2941 30 avctx->pix_fmt = theora_pix_fmts[get_bits(gb, 2)];
2942
1/2
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✓ Branch 1 taken 30 times.
 30 if (avctx->pix_fmt == AV_PIX_FMT_NONE) {
2943 ✗ av_log(avctx, AV_LOG_ERROR, "Invalid pixel format\n");
2944 ✗ return AVERROR_INVALIDDATA;
2945 }
2946 30 skip_bits(gb, 3); /* reserved */
2947 } else
2948 ✗ avctx->pix_fmt = AV_PIX_FMT_YUV420P;
2949
2950
1/2
✗ Branch 0 not taken.
✓ Branch 1 taken 30 times.
 30 if (s->width < 18)
2951 ✗ return AVERROR_PATCHWELCOME;
2952 30 ret = ff_set_dimensions(avctx, s->width, s->height);
2953
1/2
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 30 if (ret < 0)
2954 ✗ return ret;
2955
1/2
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✗ Branch 1 not taken.
 30 if (!(avctx->flags2 & AV_CODEC_FLAG2_IGNORE_CROP)) {
2956 30 avctx->width = visible_width;
2957 30 avctx->height = visible_height;
2958 // translate offsets from theora axis ([0,0] lower left)
2959 // to normal axis ([0,0] upper left)
2960 30 s->offset_x = offset_x;
2961 30 s->offset_y = s->height - visible_height - offset_y;
2962 }
2963
2964
1/2
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 30 if (colorspace == 1)
2965 ✗ avctx->color_primaries = AVCOL_PRI_BT470M;
2966
1/2
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 30 else if (colorspace == 2)
2967 ✗ avctx->color_primaries = AVCOL_PRI_BT470BG;
2968
2969
2/4
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✓ Branch 3 taken 30 times.
 30 if (colorspace == 1 || colorspace == 2) {
2970 ✗ avctx->colorspace = AVCOL_SPC_BT470BG;
2971 ✗ avctx->color_trc = AVCOL_TRC_BT709;
2972 }
2973
2974 30 s->theora_header = 1;
2975 30 return 0;
2976 }
2977
2978 30 static int theora_decode_tables(AVCodecContext *avctx, GetBitContext *gb)
2979 {
2980 30 Vp3DecodeContext *s = avctx->priv_data;
2981 int n, matrices, ret;
2982
2983
1/2
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 30 if (!s->theora_header)
2984 ✗ return AVERROR_INVALIDDATA;
2985
2986
1/2
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✗ Branch 1 not taken.
 30 if (s->theora >= 0x030200) {
2987 30 n = get_bits(gb, 3);
2988 /* loop filter limit values table */
2989
1/2
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✗ Branch 1 not taken.
 30 if (n)
2990
2/2
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✓ Branch 1 taken 30 times.
 1950 for (int i = 0; i < 64; i++)
2991 1920 s->filter_limit_values[i] = get_bits(gb, n);
2992 }
2993
2994
1/2
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✗ Branch 1 not taken.
 30 if (s->theora >= 0x030200)
2995 30 n = get_bits(gb, 4) + 1;
2996 else
2997 ✗ n = 16;
2998 /* quality threshold table */
2999
2/2
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✓ Branch 1 taken 30 times.
 1950 for (int i = 0; i < 64; i++)
3000 1920 s->coded_ac_scale_factor[i] = get_bits(gb, n);
3001
3002
1/2
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✗ Branch 1 not taken.
 30 if (s->theora >= 0x030200)
3003 30 n = get_bits(gb, 4) + 1;
3004 else
3005 ✗ n = 16;
3006 /* dc scale factor table */
3007
2/2
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✓ Branch 1 taken 30 times.
 1950 for (int i = 0; i < 64; i++)
3008 1920 s->coded_dc_scale_factor[0][i] =
3009 1920 s->coded_dc_scale_factor[1][i] = get_bits(gb, n);
3010
3011
1/2
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✗ Branch 1 not taken.
 30 if (s->theora >= 0x030200)
3012 30 matrices = get_bits(gb, 9) + 1;
3013 else
3014 ✗ matrices = 3;
3015
3016
1/2
✗ Branch 0 not taken.
✓ Branch 1 taken 30 times.
 30 if (matrices > 384) {
3017 ✗ av_log(avctx, AV_LOG_ERROR, "invalid number of base matrixes\n");
3018 ✗ return -1;
3019 }
3020
3021
2/2
✓ Branch 0 taken 387 times.
✓ Branch 1 taken 30 times.
 417 for (int j = 0; j < matrices; j++)
3022
2/2
✓ Branch 0 taken 24768 times.
✓ Branch 1 taken 387 times.
 25155 for (int i = 0; i < 64; i++)
3023 24768 s->base_matrix[j][i] = get_bits(gb, 8);
3024
3025
2/2
✓ Branch 0 taken 60 times.
✓ Branch 1 taken 30 times.
 90 for (int inter = 0; inter <= 1; inter++) {
3026
2/2
✓ Branch 0 taken 180 times.
✓ Branch 1 taken 60 times.
 240 for (int plane = 0; plane <= 2; plane++) {
3027 180 int newqr = 1;
3028
4/4
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✓ Branch 1 taken 90 times.
✓ Branch 2 taken 60 times.
✓ Branch 3 taken 30 times.
 180 if (inter || plane > 0)
3029 150 newqr = get_bits1(gb);
3030
2/2
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✓ Branch 1 taken 66 times.
 180 if (!newqr) {
3031 int qtj, plj;
3032
4/4
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✓ Branch 1 taken 30 times.
✓ Branch 3 taken 72 times.
✓ Branch 4 taken 12 times.
 114 if (inter && get_bits1(gb)) {
3033 72 qtj = 0;
3034 72 plj = plane;
3035 } else {
3036 42 qtj = (3 * inter + plane - 1) / 3;
3037 42 plj = (plane + 2) % 3;
3038 }
3039 114 s->qr_count[inter][plane] = s->qr_count[qtj][plj];
3040 114 memcpy(s->qr_size[inter][plane], s->qr_size[qtj][plj],
3041 sizeof(s->qr_size[0][0]));
3042 114 memcpy(s->qr_base[inter][plane], s->qr_base[qtj][plj],
3043 sizeof(s->qr_base[0][0]));
3044 } else {
3045 66 int qri = 0;
3046 66 int qi = 0;
3047
3048 360 for (;;) {
3049 426 int i = get_bits(gb, av_log2(matrices - 1) + 1);
3050
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 426 if (i >= matrices) {
3051 ✗ av_log(avctx, AV_LOG_ERROR,
3052 "invalid base matrix index\n");
3053 ✗ return -1;
3054 }
3055 426 s->qr_base[inter][plane][qri] = i;
3056
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 426 if (qi >= 63)
3057 66 break;
3058 360 i = get_bits(gb, av_log2(63 - qi) + 1) + 1;
3059 360 s->qr_size[inter][plane][qri++] = i;
3060 360 qi += i;
3061 }
3062
3063
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 66 if (qi > 63) {
3064 ✗ av_log(avctx, AV_LOG_ERROR, "invalid qi %d > 63\n", qi);
3065 ✗ return -1;
3066 }
3067 66 s->qr_count[inter][plane] = qri;
3068 }
3069 }
3070 }
3071
3072 /* Huffman tables */
3073
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 2430 for (int i = 0; i < FF_ARRAY_ELEMS(s->huffman_table); i++) {
3074 2400 s->huffman_table[i].nb_entries = 0;
3075
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 2400 if ((ret = read_huffman_tree(&s->huffman_table[i], gb, 0, avctx)) < 0)
3076 ✗ return ret;
3077 }
3078
3079 30 s->theora_tables = 1;
3080
3081 30 return 0;
3082 }
3083
3084 30 static av_cold int theora_decode_init(AVCodecContext *avctx)
3085 {
3086 30 Vp3DecodeContext *s = avctx->priv_data;
3087 GetBitContext gb;
3088 int ptype;
3089 const uint8_t *header_start[3];
3090 int header_len[3];
3091 int ret;
3092
3093 30 avctx->pix_fmt = AV_PIX_FMT_YUV420P;
3094
3095 30 s->theora = 1;
3096
3097
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 30 if (!avctx->extradata_size) {
3098 ✗ av_log(avctx, AV_LOG_ERROR, "Missing extradata!\n");
3099 ✗ return -1;
3100 }
3101
3102
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 30 if (avpriv_split_xiph_headers(avctx->extradata, avctx->extradata_size,
3103 42, header_start, header_len) < 0) {
3104 ✗ av_log(avctx, AV_LOG_ERROR, "Corrupt extradata\n");
3105 ✗ return -1;
3106 }
3107
3108
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 120 for (int i = 0; i < 3; i++) {
3109
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 90 if (header_len[i] <= 0)
3110 ✗ continue;
3111 90 ret = init_get_bits8(&gb, header_start[i], header_len[i]);
3112
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 90 if (ret < 0)
3113 ✗ return ret;
3114
3115 90 ptype = get_bits(&gb, 8);
3116
3117
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 90 if (!(ptype & 0x80)) {
3118 ✗ av_log(avctx, AV_LOG_ERROR, "Invalid extradata!\n");
3119 // return -1;
3120 }
3121
3122 // FIXME: Check for this as well.
3123 90 skip_bits_long(&gb, 6 * 8); /* "theora" */
3124
3125
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 90 switch (ptype) {
3126 30 case 0x80:
3127
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 30 if (theora_decode_header(avctx, &gb) < 0)
3128 ✗ return -1;
3129 30 break;
3130 30 case 0x81:
3131 // FIXME: is this needed? it breaks sometimes
3132 // theora_decode_comments(avctx, gb);
3133 30 break;
3134 30 case 0x82:
3135
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 30 if (theora_decode_tables(avctx, &gb))
3136 ✗ return -1;
3137 30 break;
3138 ✗ default:
3139 ✗ av_log(avctx, AV_LOG_ERROR,
3140 "Unknown Theora config packet: %d\n", ptype & ~0x80);
3141 ✗ break;
3142 }
3143
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 90 if (ptype != 0x81 && get_bits_left(&gb) >= 8U)
3144 ✗ av_log(avctx, AV_LOG_WARNING,
3145 "%d bits left in packet %X\n",
3146 get_bits_left(&gb), ptype);
3147
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 90 if (s->theora < 0x030200)
3148 ✗ break;
3149 }
3150
3151 30 return vp3_decode_init(avctx);
3152 }
3153
3154 const FFCodec ff_theora_decoder = {
3155 .p.name = "theora",
3156 CODEC_LONG_NAME("Theora"),
3157 .p.type = AVMEDIA_TYPE_VIDEO,
3158 .p.id = AV_CODEC_ID_THEORA,
3159 .priv_data_size = sizeof(Vp3DecodeContext),
3160 .init = theora_decode_init,
3161 .close = vp3_decode_end,
3162 FF_CODEC_DECODE_CB(vp3_decode_frame),
3163 .p.capabilities = AV_CODEC_CAP_DR1 | AV_CODEC_CAP_DRAW_HORIZ_BAND |
3164 AV_CODEC_CAP_FRAME_THREADS,
3165 .flush = vp3_decode_flush,
3166 UPDATE_THREAD_CONTEXT(vp3_update_thread_context),
3167 .caps_internal = FF_CODEC_CAP_INIT_CLEANUP |
3168 FF_CODEC_CAP_EXPORTS_CROPPING |
3169 FF_CODEC_CAP_USES_PROGRESSFRAMES,
3170 };
3171 #endif
3172
3173 const FFCodec ff_vp3_decoder = {
3174 .p.name = "vp3",
3175 CODEC_LONG_NAME("On2 VP3"),
3176 .p.type = AVMEDIA_TYPE_VIDEO,
3177 .p.id = AV_CODEC_ID_VP3,
3178 .priv_data_size = sizeof(Vp3DecodeContext),
3179 .init = vp3_decode_init,
3180 .close = vp3_decode_end,
3181 FF_CODEC_DECODE_CB(vp3_decode_frame),
3182 .p.capabilities = AV_CODEC_CAP_DR1 | AV_CODEC_CAP_DRAW_HORIZ_BAND |
3183 AV_CODEC_CAP_FRAME_THREADS,
3184 .flush = vp3_decode_flush,
3185 UPDATE_THREAD_CONTEXT(vp3_update_thread_context),
3186 .caps_internal = FF_CODEC_CAP_INIT_CLEANUP |
3187 FF_CODEC_CAP_USES_PROGRESSFRAMES,
3188 };
3189
3190 #if CONFIG_VP4_DECODER
3191 const FFCodec ff_vp4_decoder = {
3192 .p.name = "vp4",
3193 CODEC_LONG_NAME("On2 VP4"),
3194 .p.type = AVMEDIA_TYPE_VIDEO,
3195 .p.id = AV_CODEC_ID_VP4,
3196 .priv_data_size = sizeof(Vp3DecodeContext),
3197 .init = vp3_decode_init,
3198 .close = vp3_decode_end,
3199 FF_CODEC_DECODE_CB(vp3_decode_frame),
3200 .p.capabilities = AV_CODEC_CAP_DR1 | AV_CODEC_CAP_DRAW_HORIZ_BAND |
3201 AV_CODEC_CAP_FRAME_THREADS,
3202 .flush = vp3_decode_flush,
3203 UPDATE_THREAD_CONTEXT(vp3_update_thread_context),
3204 .caps_internal = FF_CODEC_CAP_INIT_CLEANUP |
3205 FF_CODEC_CAP_USES_PROGRESSFRAMES,
3206 };
3207 #endif
3208