FFmpeg coverage

Directory: ../../../ffmpeg/
File: src/libavcodec/vp3.c
Date: 2026-06-16 12:54:33
Exec Total Coverage
Lines: 1227 1501 81.7%
Functions: 40 43 93.0%
Branches: 797 1068 74.6%
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/imgutils.h"
40 #include "libavutil/mem.h"
41 #include "libavutil/mem_internal.h"
42 #include "libavutil/thread.h"
43
44 #include "avcodec.h"
45 #include "codec_internal.h"
46 #include "decode.h"
47 #include "get_bits.h"
48 #include "hpeldsp.h"
49 #include "jpegquanttables.h"
50 #include "mathops.h"
51 #include "progressframe.h"
52 #include "libavutil/refstruct.h"
53 #include "thread.h"
54 #include "videodsp.h"
55 #include "vp3data.h"
56 #include "vp4data.h"
57 #include "vp3dsp.h"
58 #include "xiph.h"
59
60 #define VP3_MV_VLC_BITS 6
61 #define VP4_MV_VLC_BITS 6
62 #define SUPERBLOCK_VLC_BITS 6
63
64 #define FRAGMENT_PIXELS 8
65
66 // FIXME split things out into their own arrays
67 typedef struct Vp3Fragment {
68 int16_t dc;
69 uint8_t coding_method;
70 uint8_t qpi;
71 } Vp3Fragment;
72
73 #define SB_NOT_CODED 0
74 #define SB_PARTIALLY_CODED 1
75 #define SB_FULLY_CODED 2
76
77 // This is the maximum length of a single long bit run that can be encoded
78 // for superblock coding or block qps. Theora special-cases this to read a
79 // bit instead of flipping the current bit to allow for runs longer than 4129.
80 #define MAXIMUM_LONG_BIT_RUN 4129
81
82 #define MODE_INTER_NO_MV 0
83 #define MODE_INTRA 1
84 #define MODE_INTER_PLUS_MV 2
85 #define MODE_INTER_LAST_MV 3
86 #define MODE_INTER_PRIOR_LAST 4
87 #define MODE_USING_GOLDEN 5
88 #define MODE_GOLDEN_MV 6
89 #define MODE_INTER_FOURMV 7
90 #define CODING_MODE_COUNT 8
91
92 /* special internal mode */
93 #define MODE_COPY 8
94
95 static int theora_decode_header(AVCodecContext *avctx, GetBitContext *gb);
96 static int theora_decode_tables(AVCodecContext *avctx, GetBitContext *gb);
97
98
99 /* There are 6 preset schemes, plus a free-form scheme */
100 static const int ModeAlphabet[6][CODING_MODE_COUNT] = {
101 /* scheme 1: Last motion vector dominates */
102 { MODE_INTER_LAST_MV, MODE_INTER_PRIOR_LAST,
103 MODE_INTER_PLUS_MV, MODE_INTER_NO_MV,
104 MODE_INTRA, MODE_USING_GOLDEN,
105 MODE_GOLDEN_MV, MODE_INTER_FOURMV },
106
107 /* scheme 2 */
108 { MODE_INTER_LAST_MV, MODE_INTER_PRIOR_LAST,
109 MODE_INTER_NO_MV, MODE_INTER_PLUS_MV,
110 MODE_INTRA, MODE_USING_GOLDEN,
111 MODE_GOLDEN_MV, MODE_INTER_FOURMV },
112
113 /* scheme 3 */
114 { MODE_INTER_LAST_MV, MODE_INTER_PLUS_MV,
115 MODE_INTER_PRIOR_LAST, MODE_INTER_NO_MV,
116 MODE_INTRA, MODE_USING_GOLDEN,
117 MODE_GOLDEN_MV, MODE_INTER_FOURMV },
118
119 /* scheme 4 */
120 { MODE_INTER_LAST_MV, MODE_INTER_PLUS_MV,
121 MODE_INTER_NO_MV, MODE_INTER_PRIOR_LAST,
122 MODE_INTRA, MODE_USING_GOLDEN,
123 MODE_GOLDEN_MV, MODE_INTER_FOURMV },
124
125 /* scheme 5: No motion vector dominates */
126 { MODE_INTER_NO_MV, MODE_INTER_LAST_MV,
127 MODE_INTER_PRIOR_LAST, MODE_INTER_PLUS_MV,
128 MODE_INTRA, MODE_USING_GOLDEN,
129 MODE_GOLDEN_MV, MODE_INTER_FOURMV },
130
131 /* scheme 6 */
132 { MODE_INTER_NO_MV, MODE_USING_GOLDEN,
133 MODE_INTER_LAST_MV, MODE_INTER_PRIOR_LAST,
134 MODE_INTER_PLUS_MV, MODE_INTRA,
135 MODE_GOLDEN_MV, MODE_INTER_FOURMV },
136 };
137
138 static const uint8_t hilbert_offset[16][2] = {
139 { 0, 0 }, { 1, 0 }, { 1, 1 }, { 0, 1 },
140 { 0, 2 }, { 0, 3 }, { 1, 3 }, { 1, 2 },
141 { 2, 2 }, { 2, 3 }, { 3, 3 }, { 3, 2 },
142 { 3, 1 }, { 2, 1 }, { 2, 0 }, { 3, 0 }
143 };
144
145 enum {
146 VP4_DC_INTRA = 0,
147 VP4_DC_INTER = 1,
148 VP4_DC_GOLDEN = 2,
149 NB_VP4_DC_TYPES,
150 VP4_DC_UNDEFINED = NB_VP4_DC_TYPES
151 };
152
153 static const uint8_t vp4_pred_block_type_map[8] = {
154 [MODE_INTER_NO_MV] = VP4_DC_INTER,
155 [MODE_INTRA] = VP4_DC_INTRA,
156 [MODE_INTER_PLUS_MV] = VP4_DC_INTER,
157 [MODE_INTER_LAST_MV] = VP4_DC_INTER,
158 [MODE_INTER_PRIOR_LAST] = VP4_DC_INTER,
159 [MODE_USING_GOLDEN] = VP4_DC_GOLDEN,
160 [MODE_GOLDEN_MV] = VP4_DC_GOLDEN,
161 [MODE_INTER_FOURMV] = VP4_DC_INTER,
162 };
163
164 static VLCElem superblock_run_length_vlc[88]; /* version < 2 */
165 static VLCElem fragment_run_length_vlc[56]; /* version < 2 */
166 static VLCElem motion_vector_vlc[112]; /* version < 2 */
167
168 // The VP4 tables reuse this vlc.
169 static VLCElem mode_code_vlc[24 + 2108 * CONFIG_VP4_DECODER];
170
171 #if CONFIG_VP4_DECODER
172 static const VLCElem *vp4_mv_vlc_table[2][7]; /* version >= 2 */
173 static const VLCElem *block_pattern_vlc[2]; /* version >= 2 */
174 #endif
175
176 typedef struct {
177 int dc;
178 int type;
179 } VP4Predictor;
180
181 #define MIN_DEQUANT_VAL 2
182
183 typedef struct HuffEntry {
184 uint8_t len, sym;
185 } HuffEntry;
186
187 typedef struct HuffTable {
188 HuffEntry entries[32];
189 uint8_t nb_entries;
190 } HuffTable;
191
192 typedef struct CoeffVLCs {
193 const VLCElem *vlc_tabs[80];
194 VLC vlcs[80];
195 } CoeffVLCs;
196
197 typedef struct Vp3DecodeContext {
198 AVCodecContext *avctx;
199 int theora, theora_tables, theora_header;
200 int version;
201 int width, height;
202 int chroma_x_shift, chroma_y_shift;
203 ProgressFrame golden_frame;
204 ProgressFrame last_frame;
205 ProgressFrame current_frame;
206 int keyframe;
207 uint8_t idct_permutation[64];
208 uint8_t idct_scantable[64];
209 HpelDSPContext hdsp;
210 VideoDSPContext vdsp;
211 VP3DSPContext vp3dsp;
212 DECLARE_ALIGNED(16, int16_t, block)[64];
213 int flipped_image;
214 int last_slice_end;
215 int skip_loop_filter;
216
217 int qps[3];
218 int nqps;
219
220 int superblock_count;
221 int y_superblock_width;
222 int y_superblock_height;
223 int y_superblock_count;
224 int c_superblock_width;
225 int c_superblock_height;
226 int c_superblock_count;
227 int u_superblock_start;
228 int v_superblock_start;
229 unsigned char *superblock_coding;
230
231 int macroblock_count; /* y macroblock count */
232 int macroblock_width;
233 int macroblock_height;
234 int c_macroblock_count;
235 int c_macroblock_width;
236 int c_macroblock_height;
237 int yuv_macroblock_count; /* y+u+v macroblock count */
238
239 int fragment_count;
240 int fragment_width[2];
241 int fragment_height[2];
242
243 Vp3Fragment *all_fragments;
244 int fragment_start[3];
245 int data_offset[3];
246 uint8_t offset_x;
247 uint8_t offset_y;
248 int offset_x_warned;
249
250 int8_t (*motion_val[2])[2];
251
252 /* tables */
253 uint16_t coded_dc_scale_factor[2][64];
254 uint32_t coded_ac_scale_factor[64];
255 uint8_t base_matrix[384][64];
256 uint8_t qr_count[2][3];
257 uint8_t qr_size[2][3][64];
258 uint16_t qr_base[2][3][64];
259
260 /**
261 * This is a list of all tokens in bitstream order. Reordering takes place
262 * by pulling from each level during IDCT. As a consequence, IDCT must be
263 * in Hilbert order, making the minimum slice height 64 for 4:2:0 and 32
264 * otherwise. The 32 different tokens with up to 12 bits of extradata are
265 * collapsed into 3 types, packed as follows:
266 * (from the low to high bits)
267 *
268 * 2 bits: type (0,1,2)
269 * 0: EOB run, 14 bits for run length (12 needed)
270 * 1: zero run, 7 bits for run length
271 * 7 bits for the next coefficient (3 needed)
272 * 2: coefficient, 14 bits (11 needed)
273 *
274 * Coefficients are signed, so are packed in the highest bits for automatic
275 * sign extension.
276 */
277 int16_t *dct_tokens[3][64];
278 int16_t *dct_tokens_base;
279 #define TOKEN_EOB(eob_run) ((eob_run) << 2)
280 #define TOKEN_ZERO_RUN(coeff, zero_run) (((coeff) * 512) + ((zero_run) << 2) + 1)
281 #define TOKEN_COEFF(coeff) (((coeff) * 4) + 2)
282
283 /**
284 * number of blocks that contain DCT coefficients at
285 * the given level or higher
286 */
287 int num_coded_frags[3][64];
288 int total_num_coded_frags;
289
290 /* this is a list of indexes into the all_fragments array indicating
291 * which of the fragments are coded */
292 int *coded_fragment_list[3];
293
294 int *kf_coded_fragment_list;
295 int *nkf_coded_fragment_list;
296 int num_kf_coded_fragment[3];
297
298 /**
299 * The first 16 of the following VLCs are for the dc coefficients;
300 * the others are four groups of 16 VLCs each for ac coefficients.
301 * This is a RefStruct reference to share these VLCs between threads.
302 */
303 CoeffVLCs *coeff_vlc;
304
305 /* these arrays need to be on 16-byte boundaries since SSE2 operations
306 * index into them */
307 DECLARE_ALIGNED(16, int16_t, qmat)[3][2][3][64]; ///< qmat[qpi][is_inter][plane]
308
309 /* This table contains superblock_count * 16 entries. Each set of 16
310 * numbers corresponds to the fragment indexes 0..15 of the superblock.
311 * An entry will be -1 to indicate that no entry corresponds to that
312 * index. */
313 int *superblock_fragments;
314
315 /* This is an array that indicates how a particular macroblock
316 * is coded. */
317 unsigned char *macroblock_coding;
318
319 uint8_t *edge_emu_buffer;
320
321 /* Huffman decode */
322 HuffTable huffman_table[5 * 16];
323
324 uint8_t filter_limit_values[64];
325 DECLARE_ALIGNED(16, int, bounding_values_array)[256 + 4];
326
327 VP4Predictor * dc_pred_row; /* dc_pred_row[y_superblock_width * 4] */
328 } Vp3DecodeContext;
329
330 /************************************************************************
331 * VP3 specific functions
332 ************************************************************************/
333
334 70 static av_cold void free_tables(AVCodecContext *avctx)
335 {
336 70 Vp3DecodeContext *s = avctx->priv_data;
337
338 70 av_freep(&s->superblock_coding);
339 70 av_freep(&s->all_fragments);
340 70 av_freep(&s->nkf_coded_fragment_list);
341 70 av_freep(&s->kf_coded_fragment_list);
342 70 av_freep(&s->dct_tokens_base);
343 70 av_freep(&s->superblock_fragments);
344 70 av_freep(&s->macroblock_coding);
345 70 av_freep(&s->dc_pred_row);
346 70 av_freep(&s->motion_val[0]);
347 70 av_freep(&s->motion_val[1]);
348 70 }
349
350 35 static av_cold void vp3_decode_flush(AVCodecContext *avctx)
351 {
352 35 Vp3DecodeContext *s = avctx->priv_data;
353
354 35 ff_progress_frame_unref(&s->golden_frame);
355 35 ff_progress_frame_unref(&s->last_frame);
356 35 ff_progress_frame_unref(&s->current_frame);
357 35 }
358
359 35 static av_cold int vp3_decode_end(AVCodecContext *avctx)
360 {
361 35 Vp3DecodeContext *s = avctx->priv_data;
362
363 35 free_tables(avctx);
364 35 av_freep(&s->edge_emu_buffer);
365
366 35 s->theora_tables = 0;
367
368 /* release all frames */
369 35 vp3_decode_flush(avctx);
370
371 35 av_refstruct_unref(&s->coeff_vlc);
372
373 35 return 0;
374 }
375
376 /**
377 * This function sets up all of the various blocks mappings:
378 * superblocks <-> fragments, macroblocks <-> fragments,
379 * superblocks <-> macroblocks
380 *
381 * @return 0 is successful; returns 1 if *anything* went wrong.
382 */
383 35 static int init_block_mapping(Vp3DecodeContext *s)
384 {
385 35 int j = 0;
386
387
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 140 for (int plane = 0; plane < 3; plane++) {
388 105 int sb_width = plane ? s->c_superblock_width
389
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 105 : s->y_superblock_width;
390 105 int sb_height = plane ? s->c_superblock_height
391
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 105 : s->y_superblock_height;
392 105 int frag_width = s->fragment_width[!!plane];
393 105 int frag_height = s->fragment_height[!!plane];
394
395
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 1758 for (int sb_y = 0; sb_y < sb_height; sb_y++)
396
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 48052 for (int sb_x = 0; sb_x < sb_width; sb_x++)
397
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 788783 for (int i = 0; i < 16; i++) {
398 742384 int x = 4 * sb_x + hilbert_offset[i][0];
399 742384 int y = 4 * sb_y + hilbert_offset[i][1];
400
401
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 742384 if (x < frag_width && y < frag_height)
402 717114 s->superblock_fragments[j++] = s->fragment_start[plane] +
403 717114 y * frag_width + x;
404 else
405 25270 s->superblock_fragments[j++] = -1;
406 }
407 }
408
409 35 return 0; /* successful path out */
410 }
411
412 /*
413 * This function sets up the dequantization tables used for a particular
414 * frame.
415 */
416 62 static void init_dequantizer(Vp3DecodeContext *s, int qpi)
417 {
418 62 int ac_scale_factor = s->coded_ac_scale_factor[s->qps[qpi]];
419
420
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 186 for (int inter = 0; inter < 2; inter++) {
421
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 496 for (int plane = 0; plane < 3; plane++) {
422 372 int dc_scale_factor = s->coded_dc_scale_factor[!!plane][s->qps[qpi]];
423 372 int sum = 0, bmi, bmj, qistart, qri;
424
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 408 for (qri = 0; qri < s->qr_count[inter][plane]; qri++) {
425 408 sum += s->qr_size[inter][plane][qri];
426
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 408 if (s->qps[qpi] <= sum)
427 372 break;
428 }
429 372 qistart = sum - s->qr_size[inter][plane][qri];
430 372 bmi = s->qr_base[inter][plane][qri];
431 372 bmj = s->qr_base[inter][plane][qri + 1];
432
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 24180 for (int i = 0; i < 64; i++) {
433 23808 int coeff = (2 * (sum - s->qps[qpi]) * s->base_matrix[bmi][i] -
434 23808 2 * (qistart - s->qps[qpi]) * s->base_matrix[bmj][i] +
435 23808 s->qr_size[inter][plane][qri]) /
436 23808 (2 * s->qr_size[inter][plane][qri]);
437
438 23808 int qmin = 8 << (inter + !i);
439
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 23808 int qscale = i ? ac_scale_factor : dc_scale_factor;
440 23808 int qbias = (1 + inter) * 3;
441
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 47616 s->qmat[qpi][inter][plane][s->idct_permutation[i]] =
442
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 23808 (i == 0 || s->version < 2) ? av_clip((qscale * coeff) / 100 * 4, qmin, 4096)
443 1512 : (qscale * (coeff - qbias) / 100 + qbias) * 4;
444 }
445 /* all DC coefficients use the same quant so as not to interfere
446 * with DC prediction */
447 372 s->qmat[qpi][inter][plane][0] = s->qmat[0][inter][plane][0];
448 }
449 }
450 62 }
451
452 /*
453 * This function initializes the loop filter boundary limits if the frame's
454 * quality index is different from the previous frame's.
455 *
456 * The filter_limit_values may not be larger than 127.
457 */
458 62 static void init_loop_filter(Vp3DecodeContext *s)
459 {
460 62 ff_vp3dsp_set_bounding_values(s->bounding_values_array, s->filter_limit_values[s->qps[0]]);
461 62 }
462
463 /*
464 * This function unpacks all of the superblock/macroblock/fragment coding
465 * information from the bitstream.
466 */
467 140 static int unpack_superblocks(Vp3DecodeContext *s, GetBitContext *gb)
468 {
469 140 const int superblock_starts[3] = {
470 140 0, s->u_superblock_start, s->v_superblock_start
471 };
472 140 int bit = 0;
473 140 int current_superblock = 0;
474 140 int current_run = 0;
475 140 int num_partial_superblocks = 0;
476
477 int current_fragment;
478 140 int plane0_num_coded_frags = 0;
479
480
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 140 if (s->keyframe) {
481 4 memset(s->superblock_coding, SB_FULLY_CODED, s->superblock_count);
482 } else {
483 /* unpack the list of partially-coded superblocks */
484 136 bit = get_bits1(gb) ^ 1;
485 136 current_run = 0;
486
487
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 8681 while (current_superblock < s->superblock_count && get_bits_left(gb) > 0) {
488
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 8545 if (s->theora && current_run == MAXIMUM_LONG_BIT_RUN)
489 ✗ bit = get_bits1(gb);
490 else
491 8545 bit ^= 1;
492
493 8545 current_run = get_vlc2(gb, superblock_run_length_vlc,
494 SUPERBLOCK_VLC_BITS, 2);
495
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 8545 if (current_run == 34)
496 437 current_run += get_bits(gb, 12);
497
498
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 8545 if (current_run > s->superblock_count - current_superblock) {
499 ✗ av_log(s->avctx, AV_LOG_ERROR,
500 "Invalid partially coded superblock run length\n");
501 ✗ return -1;
502 }
503
504 8545 memset(s->superblock_coding + current_superblock, bit, current_run);
505
506 8545 current_superblock += current_run;
507
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 8545 if (bit)
508 4237 num_partial_superblocks += current_run;
509 }
510
511 /* unpack the list of fully coded superblocks if any of the blocks were
512 * not marked as partially coded in the previous step */
513
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 136 if (num_partial_superblocks < s->superblock_count) {
514 136 int superblocks_decoded = 0;
515
516 136 current_superblock = 0;
517 136 bit = get_bits1(gb) ^ 1;
518 136 current_run = 0;
519
520
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 2240 while (superblocks_decoded < s->superblock_count - num_partial_superblocks &&
521 1052 get_bits_left(gb) > 0) {
522
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 1052 if (s->theora && current_run == MAXIMUM_LONG_BIT_RUN)
523 6 bit = get_bits1(gb);
524 else
525 1046 bit ^= 1;
526
527 1052 current_run = get_vlc2(gb, superblock_run_length_vlc,
528 SUPERBLOCK_VLC_BITS, 2);
529
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 1052 if (current_run == 34)
530 218 current_run += get_bits(gb, 12);
531
532
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 105952 for (int j = 0; j < current_run; current_superblock++) {
533
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 104900 if (current_superblock >= s->superblock_count) {
534 ✗ av_log(s->avctx, AV_LOG_ERROR,
535 "Invalid fully coded superblock run length\n");
536 ✗ return -1;
537 }
538
539 /* skip any superblocks already marked as partially coded */
540
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 104900 if (s->superblock_coding[current_superblock] == SB_NOT_CODED) {
541 88554 s->superblock_coding[current_superblock] = 2 * bit;
542 88554 j++;
543 }
544 }
545 1052 superblocks_decoded += current_run;
546 }
547 }
548
549 /* if there were partial blocks, initialize bitstream for
550 * unpacking fragment codings */
551
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 136 if (num_partial_superblocks) {
552 128 current_run = 0;
553 128 bit = get_bits1(gb);
554 /* toggle the bit because as soon as the first run length is
555 * fetched the bit will be toggled again */
556 128 bit ^= 1;
557 }
558 }
559
560 /* figure out which fragments are coded; iterate through each
561 * superblock (all planes) */
562 140 s->total_num_coded_frags = 0;
563 140 memset(s->macroblock_coding, MODE_COPY, s->macroblock_count);
564
565 280 s->coded_fragment_list[0] = s->keyframe ? s->kf_coded_fragment_list
566
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 140 : s->nkf_coded_fragment_list;
567
568
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 560 for (int plane = 0; plane < 3; plane++) {
569 420 int sb_start = superblock_starts[plane];
570 420 int sb_end = sb_start + (plane ? s->c_superblock_count
571
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 420 : s->y_superblock_count);
572 420 int num_coded_frags = 0;
573
574
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 420 if (s->keyframe) {
575
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 12 if (s->num_kf_coded_fragment[plane] == -1) {
576
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 10538 for (int i = sb_start; i < sb_end; i++) {
577 /* iterate through all 16 fragments in a superblock */
578
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 178942 for (int j = 0; j < 16; j++) {
579 /* if the fragment is in bounds, check its coding status */
580 168416 current_fragment = s->superblock_fragments[i * 16 + j];
581
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 168416 if (current_fragment != -1) {
582 162492 s->coded_fragment_list[plane][num_coded_frags++] =
583 current_fragment;
584 }
585 }
586 }
587 12 s->num_kf_coded_fragment[plane] = num_coded_frags;
588 } else
589 ✗ num_coded_frags = s->num_kf_coded_fragment[plane];
590 } else {
591
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 105594 for (int i = sb_start; i < sb_end && get_bits_left(gb) > 0; i++) {
592
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 105186 if (get_bits_left(gb) < plane0_num_coded_frags >> 2) {
593 ✗ return AVERROR_INVALIDDATA;
594 }
595 /* iterate through all 16 fragments in a superblock */
596
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 1788162 for (int j = 0; j < 16; j++) {
597 /* if the fragment is in bounds, check its coding status */
598 1682976 current_fragment = s->superblock_fragments[i * 16 + j];
599
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 1682976 if (current_fragment != -1) {
600 1598148 int coded = s->superblock_coding[i];
601
602
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 1598148 if (coded == SB_PARTIALLY_CODED) {
603 /* fragment may or may not be coded; this is the case
604 * that cares about the fragment coding runs */
605
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 241844 if (current_run-- == 0) {
606 70601 bit ^= 1;
607 70601 current_run = get_vlc2(gb, fragment_run_length_vlc, 5, 2);
608 }
609 241844 coded = bit;
610 }
611
612
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 1598148 if (coded) {
613 /* default mode; actual mode will be decoded in
614 * the next phase */
615 370084 s->all_fragments[current_fragment].coding_method =
616 MODE_INTER_NO_MV;
617 370084 s->coded_fragment_list[plane][num_coded_frags++] =
618 current_fragment;
619 } else {
620 /* not coded; copy this fragment from the prior frame */
621 1228064 s->all_fragments[current_fragment].coding_method =
622 MODE_COPY;
623 }
624 }
625 }
626 }
627 }
628
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 420 if (!plane)
629 140 plane0_num_coded_frags = num_coded_frags;
630 420 s->total_num_coded_frags += num_coded_frags;
631
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 27300 for (int i = 0; i < 64; i++)
632 26880 s->num_coded_frags[plane][i] = num_coded_frags;
633
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 420 if (plane < 2)
634 280 s->coded_fragment_list[plane + 1] = s->coded_fragment_list[plane] +
635 num_coded_frags;
636 }
637 140 return 0;
638 }
639
640 #define BLOCK_X (2 * mb_x + (k & 1))
641 #define BLOCK_Y (2 * mb_y + (k >> 1))
642
643 #if CONFIG_VP4_DECODER
644 /**
645 * @return number of blocks, or > yuv_macroblock_count on error.
646 * return value is always >= 1.
647 */
648 7007 static int vp4_get_mb_count(Vp3DecodeContext *s, GetBitContext *gb)
649 {
650 7007 int v = 1;
651 int bits;
652
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 7007 while ((bits = show_bits(gb, 9)) == 0x1ff) {
653 ✗ skip_bits(gb, 9);
654 ✗ v += 256;
655 ✗ if (v > s->yuv_macroblock_count) {
656 ✗ av_log(s->avctx, AV_LOG_ERROR, "Invalid run length\n");
657 ✗ return v;
658 }
659 }
660 #define body(n) { \
661 skip_bits(gb, 2 + n); \
662 v += (1 << n) + get_bits(gb, n); }
663 #define thresh(n) (0x200 - (0x80 >> n))
664 #define else_if(n) else if (bits < thresh(n)) body(n)
665
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 7007 if (bits < 0x100) {
666 2784 skip_bits(gb, 1);
667
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 4223 } else if (bits < thresh(0)) {
668 1763 skip_bits(gb, 2);
669 1763 v += 1;
670 }
671
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 2460 else_if(1)
672
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 1466 else_if(2)
673
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 799 else_if(3)
674
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 316 else_if(4)
675
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 92 else_if(5)
676
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 4 else_if(6)
677 ✗ else body(7)
678 #undef body
679 #undef thresh
680 #undef else_if
681 7007 return v;
682 }
683
684 4556 static int vp4_get_block_pattern(GetBitContext *gb, int *next_block_pattern_table)
685 {
686 4556 int v = get_vlc2(gb, block_pattern_vlc[*next_block_pattern_table], 5, 1);
687 4556 *next_block_pattern_table = vp4_block_pattern_table_selector[v];
688 4556 return v + 1;
689 }
690
691 24 static int vp4_unpack_macroblocks(Vp3DecodeContext *s, GetBitContext *gb)
692 {
693 int fragment;
694 int next_block_pattern_table;
695 int bit, current_run, has_partial;
696
697 24 memset(s->macroblock_coding, MODE_COPY, s->macroblock_count);
698
699
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 24 if (s->keyframe)
700 2 return 0;
701
702 22 has_partial = 0;
703 22 bit = get_bits1(gb);
704
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 4154 for (int i = 0; i < s->yuv_macroblock_count; i += current_run) {
705
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 4132 if (get_bits_left(gb) <= 0)
706 ✗ return AVERROR_INVALIDDATA;
707 4132 current_run = vp4_get_mb_count(s, gb);
708
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 4132 if (current_run > s->yuv_macroblock_count - i)
709 ✗ return -1;
710 4132 memset(s->superblock_coding + i, 2 * bit, current_run);
711 4132 bit ^= 1;
712 4132 has_partial |= bit;
713 }
714
715
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 22 if (has_partial) {
716
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 22 if (get_bits_left(gb) <= 0)
717 ✗ return AVERROR_INVALIDDATA;
718 22 bit = get_bits1(gb);
719 22 current_run = vp4_get_mb_count(s, gb);
720
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 20086 for (int i = 0; i < s->yuv_macroblock_count; i++) {
721
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 20064 if (!s->superblock_coding[i]) {
722
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 8403 if (!current_run) {
723 2853 bit ^= 1;
724 2853 current_run = vp4_get_mb_count(s, gb);
725 }
726 8403 s->superblock_coding[i] = bit;
727 8403 current_run--;
728 }
729 }
730
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 22 if (current_run) /* handle situation when vp4_get_mb_count() fails */
731 ✗ return -1;
732 }
733
734 22 next_block_pattern_table = 0;
735
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 88 for (int plane = 0, i = 0; plane < 3; plane++) {
736
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 66 int sb_width = plane ? s->c_superblock_width : s->y_superblock_width;
737
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 66 int sb_height = plane ? s->c_superblock_height : s->y_superblock_height;
738
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 66 int mb_width = plane ? s->c_macroblock_width : s->macroblock_width;
739
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 66 int mb_height = plane ? s->c_macroblock_height : s->macroblock_height;
740 66 int fragment_width = s->fragment_width[!!plane];
741 66 int fragment_height = s->fragment_height[!!plane];
742
743
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 418 for (int sb_y = 0; sb_y < sb_height; sb_y++) {
744
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 5456 for (int sb_x = 0; sb_x < sb_width; sb_x++) {
745
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 25520 for (int j = 0; j < 4; j++) {
746 20416 int mb_x = 2 * sb_x + (j >> 1);
747 20416 int mb_y = 2 * sb_y + (j >> 1) ^ (j & 1);
748 int mb_coded, pattern, coded;
749
750
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 20416 if (mb_x >= mb_width || mb_y >= mb_height)
751 352 continue;
752
753 20064 mb_coded = s->superblock_coding[i++];
754
755
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 20064 if (mb_coded == SB_FULLY_CODED)
756 11661 pattern = 0xF;
757
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 8403 else if (mb_coded == SB_PARTIALLY_CODED)
758 4556 pattern = vp4_get_block_pattern(gb, &next_block_pattern_table);
759 else
760 3847 pattern = 0;
761
762
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 100320 for (int k = 0; k < 4; k++) {
763
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 80256 if (BLOCK_X >= fragment_width || BLOCK_Y >= fragment_height)
764 ✗ continue;
765 80256 fragment = s->fragment_start[plane] + BLOCK_Y * fragment_width + BLOCK_X;
766 80256 coded = pattern & (8 >> k);
767 /* MODE_INTER_NO_MV is the default for coded fragments.
768 the actual method is decoded in the next phase. */
769
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 80256 s->all_fragments[fragment].coding_method = coded ? MODE_INTER_NO_MV : MODE_COPY;
770 }
771 }
772 }
773 }
774 }
775 22 return 0;
776 }
777 #endif
778
779 /*
780 * This function unpacks all the coding mode data for individual macroblocks
781 * from the bitstream.
782 */
783 164 static int unpack_modes(Vp3DecodeContext *s, GetBitContext *gb)
784 {
785 int scheme;
786 int current_macroblock;
787 int current_fragment;
788 int coding_mode;
789 int custom_mode_alphabet[CODING_MODE_COUNT];
790 const int *alphabet;
791 Vp3Fragment *frag;
792
793
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 164 if (s->keyframe) {
794
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 169794 for (int i = 0; i < s->fragment_count; i++)
795 169788 s->all_fragments[i].coding_method = MODE_INTRA;
796 } else {
797 /* fetch the mode coding scheme for this frame */
798 158 scheme = get_bits(gb, 3);
799
800 /* is it a custom coding scheme? */
801
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 158 if (scheme == 0) {
802
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 207 for (int i = 0; i < 8; i++)
803 184 custom_mode_alphabet[i] = MODE_INTER_NO_MV;
804
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 207 for (int i = 0; i < 8; i++)
805 184 custom_mode_alphabet[get_bits(gb, 3)] = i;
806 23 alphabet = custom_mode_alphabet;
807 } else
808 135 alphabet = ModeAlphabet[scheme - 1];
809
810 /* iterate through all of the macroblocks that contain 1 or more
811 * coded fragments */
812
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 2038 for (int sb_y = 0; sb_y < s->y_superblock_height; sb_y++) {
813
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 73930 for (int sb_x = 0; sb_x < s->y_superblock_width; sb_x++) {
814
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 72050 if (get_bits_left(gb) <= 0)
815 ✗ return -1;
816
817
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 360250 for (int j = 0; j < 4; j++) {
818 int k;
819 288200 int mb_x = 2 * sb_x + (j >> 1);
820 288200 int mb_y = 2 * sb_y + (((j >> 1) + j) & 1);
821 288200 current_macroblock = mb_y * s->macroblock_width + mb_x;
822
823
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 288200 if (mb_x >= s->macroblock_width ||
824
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 287276 mb_y >= s->macroblock_height)
825 8466 continue;
826
827 /* coding modes are only stored if the macroblock has
828 * at least one luma block coded, otherwise it must be
829 * INTER_NO_MV */
830
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 1073976 for (k = 0; k < 4; k++) {
831 878591 current_fragment = BLOCK_Y *
832 878591 s->fragment_width[0] + BLOCK_X;
833
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 878591 if (s->all_fragments[current_fragment].coding_method != MODE_COPY)
834 84349 break;
835 }
836
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 279734 if (k == 4) {
837 195385 s->macroblock_coding[current_macroblock] = MODE_INTER_NO_MV;
838 195385 continue;
839 }
840
841 /* mode 7 means get 3 bits for each coding mode */
842
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 84349 if (scheme == 7)
843 2750 coding_mode = get_bits(gb, 3);
844 else
845 81599 coding_mode = alphabet[get_vlc2(gb, mode_code_vlc, 4, 2)];
846
847 84349 s->macroblock_coding[current_macroblock] = coding_mode;
848
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 421745 for (k = 0; k < 4; k++) {
849 337396 frag = s->all_fragments + BLOCK_Y * s->fragment_width[0] + BLOCK_X;
850
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 337396 if (frag->coding_method != MODE_COPY)
851 307251 frag->coding_method = coding_mode;
852 }
853
854 #define SET_CHROMA_MODES \
855 if (frag[s->fragment_start[1]].coding_method != MODE_COPY) \
856 frag[s->fragment_start[1]].coding_method = coding_mode; \
857 if (frag[s->fragment_start[2]].coding_method != MODE_COPY) \
858 frag[s->fragment_start[2]].coding_method = coding_mode;
859
860
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 84349 if (s->chroma_y_shift) {
861 84349 frag = s->all_fragments + mb_y *
862 84349 s->fragment_width[1] + mb_x;
863
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 84349 SET_CHROMA_MODES
864 ✗ } else if (s->chroma_x_shift) {
865 ✗ frag = s->all_fragments +
866 ✗ 2 * mb_y * s->fragment_width[1] + mb_x;
867 ✗ for (k = 0; k < 2; k++) {
868 ✗ SET_CHROMA_MODES
869 ✗ frag += s->fragment_width[1];
870 }
871 } else {
872 ✗ for (k = 0; k < 4; k++) {
873 ✗ frag = s->all_fragments +
874 ✗ BLOCK_Y * s->fragment_width[1] + BLOCK_X;
875 ✗ SET_CHROMA_MODES
876 }
877 }
878 }
879 }
880 }
881 }
882
883 164 return 0;
884 }
885
886 3758 static int vp4_get_mv(GetBitContext *gb, int axis, int last_motion)
887 {
888 #if CONFIG_VP4_DECODER
889 3758 int v = get_vlc2(gb, vp4_mv_vlc_table[axis][vp4_mv_table_selector[FFABS(last_motion)]],
890 VP4_MV_VLC_BITS, 2);
891
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 3758 return last_motion < 0 ? -v : v;
892 #else
893 return 0;
894 #endif
895 }
896
897 /*
898 * This function unpacks all the motion vectors for the individual
899 * macroblocks from the bitstream.
900 */
901 164 static int unpack_vectors(Vp3DecodeContext *s, GetBitContext *gb)
902 {
903 int coding_mode;
904 int motion_x[4];
905 int motion_y[4];
906 164 int last_motion_x = 0;
907 164 int last_motion_y = 0;
908 164 int prior_last_motion_x = 0;
909 164 int prior_last_motion_y = 0;
910 164 int last_gold_motion_x = 0;
911 164 int last_gold_motion_y = 0;
912 int current_macroblock;
913 int current_fragment;
914 int frag;
915
916
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 164 if (s->keyframe)
917 6 return 0;
918
919 /* coding mode 0 is the VLC scheme; 1 is the fixed code scheme; 2 is VP4 code scheme */
920
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 158 coding_mode = s->version < 2 ? get_bits1(gb) : 2;
921
922 /* iterate through all of the macroblocks that contain 1 or more
923 * coded fragments */
924
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 2038 for (int sb_y = 0; sb_y < s->y_superblock_height; sb_y++) {
925
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 73930 for (int sb_x = 0; sb_x < s->y_superblock_width; sb_x++) {
926
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 72050 if (get_bits_left(gb) <= 0)
927 ✗ return -1;
928
929
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 360250 for (int j = 0; j < 4; j++) {
930 288200 int mb_x = 2 * sb_x + (j >> 1);
931 288200 int mb_y = 2 * sb_y + (((j >> 1) + j) & 1);
932 288200 current_macroblock = mb_y * s->macroblock_width + mb_x;
933
934
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 288200 if (mb_x >= s->macroblock_width ||
935
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 287276 mb_y >= s->macroblock_height ||
936
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 279734 s->macroblock_coding[current_macroblock] == MODE_COPY)
937 8466 continue;
938
939
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 279734 switch (s->macroblock_coding[current_macroblock]) {
940 711 case MODE_GOLDEN_MV:
941
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 711 if (coding_mode == 2) { /* VP4 */
942 337 last_gold_motion_x = motion_x[0] = vp4_get_mv(gb, 0, last_gold_motion_x);
943 337 last_gold_motion_y = motion_y[0] = vp4_get_mv(gb, 1, last_gold_motion_y);
944 337 break;
945 }
946 av_fallthrough;
947 case MODE_INTER_PLUS_MV:
948 /* all 6 fragments use the same motion vector */
949
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 14558 if (coding_mode == 0) {
950 13074 motion_x[0] = get_vlc2(gb, motion_vector_vlc,
951 VP3_MV_VLC_BITS, 2);
952 13074 motion_y[0] = get_vlc2(gb, motion_vector_vlc,
953 VP3_MV_VLC_BITS, 2);
954
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 1484 } else if (coding_mode == 1) {
955 42 motion_x[0] = fixed_motion_vector_table[get_bits(gb, 6)];
956 42 motion_y[0] = fixed_motion_vector_table[get_bits(gb, 6)];
957 } else { /* VP4 */
958 1442 motion_x[0] = vp4_get_mv(gb, 0, last_motion_x);
959 1442 motion_y[0] = vp4_get_mv(gb, 1, last_motion_y);
960 }
961
962 /* vector maintenance, only on MODE_INTER_PLUS_MV */
963
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 14558 if (s->macroblock_coding[current_macroblock] == MODE_INTER_PLUS_MV) {
964 14184 prior_last_motion_x = last_motion_x;
965 14184 prior_last_motion_y = last_motion_y;
966 14184 last_motion_x = motion_x[0];
967 14184 last_motion_y = motion_y[0];
968 }
969 14558 break;
970
971 63 case MODE_INTER_FOURMV:
972 /* vector maintenance */
973 63 prior_last_motion_x = last_motion_x;
974 63 prior_last_motion_y = last_motion_y;
975
976 /* fetch 4 vectors from the bitstream, one for each
977 * Y fragment, then average for the C fragment vectors */
978
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 315 for (int k = 0; k < 4; k++) {
979 252 current_fragment = BLOCK_Y * s->fragment_width[0] + BLOCK_X;
980
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 252 if (s->all_fragments[current_fragment].coding_method != MODE_COPY) {
981
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 252 if (coding_mode == 0) {
982 48 motion_x[k] = get_vlc2(gb, motion_vector_vlc,
983 VP3_MV_VLC_BITS, 2);
984 48 motion_y[k] = get_vlc2(gb, motion_vector_vlc,
985 VP3_MV_VLC_BITS, 2);
986
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 204 } else if (coding_mode == 1) {
987 104 motion_x[k] = fixed_motion_vector_table[get_bits(gb, 6)];
988 104 motion_y[k] = fixed_motion_vector_table[get_bits(gb, 6)];
989 } else { /* VP4 */
990 100 motion_x[k] = vp4_get_mv(gb, 0, prior_last_motion_x);
991 100 motion_y[k] = vp4_get_mv(gb, 1, prior_last_motion_y);
992 }
993 252 last_motion_x = motion_x[k];
994 252 last_motion_y = motion_y[k];
995 } else {
996 ✗ motion_x[k] = 0;
997 ✗ motion_y[k] = 0;
998 }
999 }
1000 63 break;
1001
1002 42307 case MODE_INTER_LAST_MV:
1003 /* all 6 fragments use the last motion vector */
1004 42307 motion_x[0] = last_motion_x;
1005 42307 motion_y[0] = last_motion_y;
1006
1007 /* no vector maintenance (last vector remains the
1008 * last vector) */
1009 42307 break;
1010
1011 11934 case MODE_INTER_PRIOR_LAST:
1012 /* all 6 fragments use the motion vector prior to the
1013 * last motion vector */
1014 11934 motion_x[0] = prior_last_motion_x;
1015 11934 motion_y[0] = prior_last_motion_y;
1016
1017 /* vector maintenance */
1018 11934 prior_last_motion_x = last_motion_x;
1019 11934 prior_last_motion_y = last_motion_y;
1020 11934 last_motion_x = motion_x[0];
1021 11934 last_motion_y = motion_y[0];
1022 11934 break;
1023
1024 210535 default:
1025 /* covers intra, inter without MV, golden without MV */
1026 210535 motion_x[0] = 0;
1027 210535 motion_y[0] = 0;
1028
1029 /* no vector maintenance */
1030 210535 break;
1031 }
1032
1033 /* assign the motion vectors to the correct fragments */
1034
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 1398670 for (int k = 0; k < 4; k++) {
1035 1118936 current_fragment =
1036 1118936 BLOCK_Y * s->fragment_width[0] + BLOCK_X;
1037
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 1118936 if (s->macroblock_coding[current_macroblock] == MODE_INTER_FOURMV) {
1038 252 s->motion_val[0][current_fragment][0] = motion_x[k];
1039 252 s->motion_val[0][current_fragment][1] = motion_y[k];
1040 } else {
1041 1118684 s->motion_val[0][current_fragment][0] = motion_x[0];
1042 1118684 s->motion_val[0][current_fragment][1] = motion_y[0];
1043 }
1044 }
1045
1046
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 279734 if (s->chroma_y_shift) {
1047
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 279734 if (s->macroblock_coding[current_macroblock] == MODE_INTER_FOURMV) {
1048
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 63 motion_x[0] = RSHIFT(motion_x[0] + motion_x[1] +
1049 motion_x[2] + motion_x[3], 2);
1050
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 63 motion_y[0] = RSHIFT(motion_y[0] + motion_y[1] +
1051 motion_y[2] + motion_y[3], 2);
1052 }
1053
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 279734 if (s->version <= 2) {
1054 266358 motion_x[0] = (motion_x[0] >> 1) | (motion_x[0] & 1);
1055 266358 motion_y[0] = (motion_y[0] >> 1) | (motion_y[0] & 1);
1056 }
1057 279734 frag = mb_y * s->fragment_width[1] + mb_x;
1058 279734 s->motion_val[1][frag][0] = motion_x[0];
1059 279734 s->motion_val[1][frag][1] = motion_y[0];
1060 ✗ } else if (s->chroma_x_shift) {
1061 ✗ if (s->macroblock_coding[current_macroblock] == MODE_INTER_FOURMV) {
1062 ✗ motion_x[0] = RSHIFT(motion_x[0] + motion_x[1], 1);
1063 ✗ motion_y[0] = RSHIFT(motion_y[0] + motion_y[1], 1);
1064 ✗ motion_x[1] = RSHIFT(motion_x[2] + motion_x[3], 1);
1065 ✗ motion_y[1] = RSHIFT(motion_y[2] + motion_y[3], 1);
1066 } else {
1067 ✗ motion_x[1] = motion_x[0];
1068 ✗ motion_y[1] = motion_y[0];
1069 }
1070 ✗ if (s->version <= 2) {
1071 ✗ motion_x[0] = (motion_x[0] >> 1) | (motion_x[0] & 1);
1072 ✗ motion_x[1] = (motion_x[1] >> 1) | (motion_x[1] & 1);
1073 }
1074 ✗ frag = 2 * mb_y * s->fragment_width[1] + mb_x;
1075 ✗ for (int k = 0; k < 2; k++) {
1076 ✗ s->motion_val[1][frag][0] = motion_x[k];
1077 ✗ s->motion_val[1][frag][1] = motion_y[k];
1078 ✗ frag += s->fragment_width[1];
1079 }
1080 } else {
1081 ✗ for (int k = 0; k < 4; k++) {
1082 ✗ frag = BLOCK_Y * s->fragment_width[1] + BLOCK_X;
1083 ✗ if (s->macroblock_coding[current_macroblock] == MODE_INTER_FOURMV) {
1084 ✗ s->motion_val[1][frag][0] = motion_x[k];
1085 ✗ s->motion_val[1][frag][1] = motion_y[k];
1086 } else {
1087 ✗ s->motion_val[1][frag][0] = motion_x[0];
1088 ✗ s->motion_val[1][frag][1] = motion_y[0];
1089 }
1090 }
1091 }
1092 }
1093 }
1094 }
1095
1096 158 return 0;
1097 }
1098
1099 164 static int unpack_block_qpis(Vp3DecodeContext *s, GetBitContext *gb)
1100 {
1101 164 int num_blocks = s->total_num_coded_frags;
1102
1103
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 164 for (int qpi = 0; qpi < s->nqps - 1 && num_blocks > 0; qpi++) {
1104 ✗ int i = 0, blocks_decoded = 0, num_blocks_at_qpi = 0;
1105 int bit, run_length;
1106
1107 ✗ bit = get_bits1(gb) ^ 1;
1108 ✗ run_length = 0;
1109
1110 do {
1111 ✗ if (run_length == MAXIMUM_LONG_BIT_RUN)
1112 ✗ bit = get_bits1(gb);
1113 else
1114 ✗ bit ^= 1;
1115
1116 ✗ run_length = get_vlc2(gb, superblock_run_length_vlc,
1117 SUPERBLOCK_VLC_BITS, 2);
1118 ✗ if (run_length == 34)
1119 ✗ run_length += get_bits(gb, 12);
1120 ✗ blocks_decoded += run_length;
1121
1122 ✗ if (!bit)
1123 ✗ num_blocks_at_qpi += run_length;
1124
1125 ✗ for (int j = 0; j < run_length; i++) {
1126 ✗ if (i >= s->total_num_coded_frags)
1127 ✗ return -1;
1128
1129 ✗ if (s->all_fragments[s->coded_fragment_list[0][i]].qpi == qpi) {
1130 ✗ s->all_fragments[s->coded_fragment_list[0][i]].qpi += bit;
1131 ✗ j++;
1132 }
1133 }
1134 ✗ } while (blocks_decoded < num_blocks && get_bits_left(gb) > 0);
1135
1136 ✗ num_blocks -= num_blocks_at_qpi;
1137 }
1138
1139 164 return 0;
1140 }
1141
1142 259052 static inline int get_eob_run(GetBitContext *gb, int token)
1143 {
1144 259052 int v = eob_run_table[token].base;
1145
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 259052 if (eob_run_table[token].bits)
1146 33652 v += get_bits(gb, eob_run_table[token].bits);
1147 259052 return v;
1148 }
1149
1150 2755489 static inline int get_coeff(GetBitContext *gb, int token, int16_t *coeff)
1151 {
1152 int bits_to_get, zero_run;
1153
1154 2755489 bits_to_get = coeff_get_bits[token];
1155
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 2755489 if (bits_to_get)
1156 1617513 bits_to_get = get_bits(gb, bits_to_get);
1157 2755489 *coeff = coeff_tables[token][bits_to_get];
1158
1159 2755489 zero_run = zero_run_base[token];
1160
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 2755489 if (zero_run_get_bits[token])
1161 342682 zero_run += get_bits(gb, zero_run_get_bits[token]);
1162
1163 2755489 return zero_run;
1164 }
1165
1166 /*
1167 * This function is called by unpack_dct_coeffs() to extract the VLCs from
1168 * the bitstream. The VLCs encode tokens which are used to unpack DCT
1169 * data. This function unpacks all the VLCs for either the Y plane or both
1170 * C planes, and is called for DC coefficients or different AC coefficient
1171 * levels (since different coefficient types require different VLC tables.
1172 *
1173 * This function returns a residual eob run. E.g, if a particular token gave
1174 * instructions to EOB the next 5 fragments and there were only 2 fragments
1175 * left in the current fragment range, 3 would be returned so that it could
1176 * be passed into the next call to this same function.
1177 */
1178 26880 static int unpack_vlcs(Vp3DecodeContext *s, GetBitContext *gb,
1179 const VLCElem *vlc_table, int coeff_index,
1180 int plane,
1181 int eob_run)
1182 {
1183 26880 int j = 0;
1184 int token;
1185 26880 int zero_run = 0;
1186 26880 int16_t coeff = 0;
1187 int blocks_ended;
1188 26880 int coeff_i = 0;
1189 26880 int num_coeffs = s->num_coded_frags[plane][coeff_index];
1190 26880 int16_t *dct_tokens = s->dct_tokens[plane][coeff_index];
1191
1192 /* local references to structure members to avoid repeated dereferences */
1193 26880 const int *coded_fragment_list = s->coded_fragment_list[plane];
1194 26880 Vp3Fragment *all_fragments = s->all_fragments;
1195
1196
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 26880 if (num_coeffs < 0) {
1197 ✗ av_log(s->avctx, AV_LOG_ERROR,
1198 "Invalid number of coefficients at level %d\n", coeff_index);
1199 ✗ return AVERROR_INVALIDDATA;
1200 }
1201
1202
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 26880 if (eob_run > num_coeffs) {
1203 3487 coeff_i =
1204 3487 blocks_ended = num_coeffs;
1205 3487 eob_run -= num_coeffs;
1206 } else {
1207 23393 coeff_i =
1208 23393 blocks_ended = eob_run;
1209 23393 eob_run = 0;
1210 }
1211
1212 // insert fake EOB token to cover the split between planes or zzi
1213
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 26880 if (blocks_ended)
1214 2019 dct_tokens[j++] = blocks_ended << 2;
1215
1216
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 2087120 while (coeff_i < num_coeffs && get_bits_left(gb) > 0) {
1217 /* decode a VLC into a token */
1218 2060240 token = get_vlc2(gb, vlc_table, 11, 3);
1219 /* use the token to get a zero run, a coefficient, and an eob run */
1220
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 2060240 if ((unsigned) token <= 6U) {
1221 220061 eob_run = get_eob_run(gb, token);
1222
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 220061 if (!eob_run)
1223 ✗ eob_run = INT_MAX;
1224
1225 // record only the number of blocks ended in this plane,
1226 // any spill will be recorded in the next plane.
1227
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 220061 if (eob_run > num_coeffs - coeff_i) {
1228 1656 dct_tokens[j++] = TOKEN_EOB(num_coeffs - coeff_i);
1229 1656 blocks_ended += num_coeffs - coeff_i;
1230 1656 eob_run -= num_coeffs - coeff_i;
1231 1656 coeff_i = num_coeffs;
1232 } else {
1233 218405 dct_tokens[j++] = TOKEN_EOB(eob_run);
1234 218405 blocks_ended += eob_run;
1235 218405 coeff_i += eob_run;
1236 218405 eob_run = 0;
1237 }
1238
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 1840179 } else if (token >= 0) {
1239 1840179 zero_run = get_coeff(gb, token, &coeff);
1240
1241
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 1840179 if (zero_run) {
1242 601916 dct_tokens[j++] = TOKEN_ZERO_RUN(coeff, zero_run);
1243 } else {
1244 // Save DC into the fragment structure. DC prediction is
1245 // done in raster order, so the actual DC can't be in with
1246 // other tokens. We still need the token in dct_tokens[]
1247 // however, or else the structure collapses on itself.
1248
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 1238263 if (!coeff_index)
1249 241967 all_fragments[coded_fragment_list[coeff_i]].dc = coeff;
1250
1251 1238263 dct_tokens[j++] = TOKEN_COEFF(coeff);
1252 }
1253
1254
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 1840179 if (coeff_index + zero_run > 64) {
1255 ✗ av_log(s->avctx, AV_LOG_DEBUG,
1256 "Invalid zero run of %d with %d coeffs left\n",
1257 zero_run, 64 - coeff_index);
1258 ✗ zero_run = 64 - coeff_index;
1259 }
1260
1261 // zero runs code multiple coefficients,
1262 // so don't try to decode coeffs for those higher levels
1263
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 4381268 for (int i = coeff_index + 1; i <= coeff_index + zero_run; i++)
1264 2541089 s->num_coded_frags[plane][i]--;
1265 1840179 coeff_i++;
1266 } else {
1267 ✗ av_log(s->avctx, AV_LOG_ERROR, "Invalid token %d\n", token);
1268 ✗ return -1;
1269 }
1270 }
1271
1272
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 26880 if (blocks_ended > s->num_coded_frags[plane][coeff_index])
1273 ✗ av_log(s->avctx, AV_LOG_ERROR, "More blocks ended than coded!\n");
1274
1275 // decrement the number of blocks that have higher coefficients for each
1276 // EOB run at this level
1277
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 26880 if (blocks_ended)
1278
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 381061 for (int i = coeff_index + 1; i < 64; i++)
1279 372769 s->num_coded_frags[plane][i] -= blocks_ended;
1280
1281 // setup the next buffer
1282
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 26880 if (plane < 2)
1283 17920 s->dct_tokens[plane + 1][coeff_index] = dct_tokens + j;
1284
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 8960 else if (coeff_index < 63)
1285 8820 s->dct_tokens[0][coeff_index + 1] = dct_tokens + j;
1286
1287 26880 return eob_run;
1288 }
1289
1290 static void reverse_dc_prediction(Vp3DecodeContext *s,
1291 int first_fragment,
1292 int fragment_width,
1293 int fragment_height);
1294 /*
1295 * This function unpacks all of the DCT coefficient data from the
1296 * bitstream.
1297 */
1298 140 static int unpack_dct_coeffs(Vp3DecodeContext *s, GetBitContext *gb)
1299 {
1300 140 const VLCElem *const *coeff_vlc = s->coeff_vlc->vlc_tabs;
1301 int dc_y_table;
1302 int dc_c_table;
1303 int ac_y_table;
1304 int ac_c_table;
1305 140 int residual_eob_run = 0;
1306 const VLCElem *y_tables[64], *c_tables[64];
1307
1308 140 s->dct_tokens[0][0] = s->dct_tokens_base;
1309
1310
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 140 if (get_bits_left(gb) < 16)
1311 ✗ return AVERROR_INVALIDDATA;
1312
1313 /* fetch the DC table indexes */
1314 140 dc_y_table = get_bits(gb, 4);
1315 140 dc_c_table = get_bits(gb, 4);
1316
1317 /* unpack the Y plane DC coefficients */
1318 140 residual_eob_run = unpack_vlcs(s, gb, coeff_vlc[dc_y_table], 0,
1319 0, residual_eob_run);
1320
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 140 if (residual_eob_run < 0)
1321 ✗ return residual_eob_run;
1322
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 140 if (get_bits_left(gb) < 8)
1323 ✗ return AVERROR_INVALIDDATA;
1324
1325 /* reverse prediction of the Y-plane DC coefficients */
1326 140 reverse_dc_prediction(s, 0, s->fragment_width[0], s->fragment_height[0]);
1327
1328 /* unpack the C plane DC coefficients */
1329 140 residual_eob_run = unpack_vlcs(s, gb, coeff_vlc[dc_c_table], 0,
1330 1, residual_eob_run);
1331
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 140 if (residual_eob_run < 0)
1332 ✗ return residual_eob_run;
1333 140 residual_eob_run = unpack_vlcs(s, gb, coeff_vlc[dc_c_table], 0,
1334 2, residual_eob_run);
1335
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 140 if (residual_eob_run < 0)
1336 ✗ return residual_eob_run;
1337
1338 /* reverse prediction of the C-plane DC coefficients */
1339
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 140 if (!(s->avctx->flags & AV_CODEC_FLAG_GRAY)) {
1340 140 reverse_dc_prediction(s, s->fragment_start[1],
1341 s->fragment_width[1], s->fragment_height[1]);
1342 140 reverse_dc_prediction(s, s->fragment_start[2],
1343 s->fragment_width[1], s->fragment_height[1]);
1344 }
1345
1346
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 140 if (get_bits_left(gb) < 8)
1347 ✗ return AVERROR_INVALIDDATA;
1348 /* fetch the AC table indexes */
1349 140 ac_y_table = get_bits(gb, 4);
1350 140 ac_c_table = get_bits(gb, 4);
1351
1352 /* build tables of AC VLC tables */
1353
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 840 for (int i = 1; i <= 5; i++) {
1354 /* AC VLC table group 1 */
1355 700 y_tables[i] = coeff_vlc[ac_y_table + 16];
1356 700 c_tables[i] = coeff_vlc[ac_c_table + 16];
1357 }
1358
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 1400 for (int i = 6; i <= 14; i++) {
1359 /* AC VLC table group 2 */
1360 1260 y_tables[i] = coeff_vlc[ac_y_table + 32];
1361 1260 c_tables[i] = coeff_vlc[ac_c_table + 32];
1362 }
1363
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 1960 for (int i = 15; i <= 27; i++) {
1364 /* AC VLC table group 3 */
1365 1820 y_tables[i] = coeff_vlc[ac_y_table + 48];
1366 1820 c_tables[i] = coeff_vlc[ac_c_table + 48];
1367 }
1368
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 5180 for (int i = 28; i <= 63; i++) {
1369 /* AC VLC table group 4 */
1370 5040 y_tables[i] = coeff_vlc[ac_y_table + 64];
1371 5040 c_tables[i] = coeff_vlc[ac_c_table + 64];
1372 }
1373
1374 /* decode all AC coefficients */
1375
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 8960 for (int i = 1; i <= 63; i++) {
1376 8820 residual_eob_run = unpack_vlcs(s, gb, y_tables[i], i,
1377 0, residual_eob_run);
1378
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 8820 if (residual_eob_run < 0)
1379 ✗ return residual_eob_run;
1380
1381 8820 residual_eob_run = unpack_vlcs(s, gb, c_tables[i], i,
1382 1, residual_eob_run);
1383
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 8820 if (residual_eob_run < 0)
1384 ✗ return residual_eob_run;
1385 8820 residual_eob_run = unpack_vlcs(s, gb, c_tables[i], i,
1386 2, residual_eob_run);
1387
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 8820 if (residual_eob_run < 0)
1388 ✗ return residual_eob_run;
1389 }
1390
1391 140 return 0;
1392 }
1393
1394 #if CONFIG_VP4_DECODER
1395 /**
1396 * eob_tracker[] is instead of TOKEN_EOB(value)
1397 * a dummy TOKEN_EOB(0) value is used to make vp3_dequant work
1398 *
1399 * @return < 0 on error
1400 */
1401 63252 static int vp4_unpack_vlcs(Vp3DecodeContext *s, GetBitContext *gb,
1402 const VLCElem *const vlc_tables[64],
1403 int plane, int eob_tracker[64], int fragment)
1404 {
1405 int token;
1406 63252 int zero_run = 0;
1407 63252 int16_t coeff = 0;
1408 63252 int coeff_i = 0;
1409 int eob_run;
1410
1411
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 973472 while (!eob_tracker[coeff_i]) {
1412
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 954301 if (get_bits_left(gb) < 1)
1413 ✗ return AVERROR_INVALIDDATA;
1414
1415 954301 token = get_vlc2(gb, vlc_tables[coeff_i], 11, 3);
1416
1417 /* use the token to get a zero run, a coefficient, and an eob run */
1418
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 954301 if ((unsigned) token <= 6U) {
1419 38991 eob_run = get_eob_run(gb, token);
1420 38991 *s->dct_tokens[plane][coeff_i]++ = TOKEN_EOB(0);
1421 38991 eob_tracker[coeff_i] = eob_run - 1;
1422 38991 return 0;
1423
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 915310 } else if (token >= 0) {
1424 915310 zero_run = get_coeff(gb, token, &coeff);
1425
1426
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 915310 if (zero_run) {
1427
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 311952 if (coeff_i + zero_run > 64) {
1428 ✗ av_log(s->avctx, AV_LOG_DEBUG,
1429 "Invalid zero run of %d with %d coeffs left\n",
1430 zero_run, 64 - coeff_i);
1431 ✗ zero_run = 64 - coeff_i;
1432 }
1433 311952 *s->dct_tokens[plane][coeff_i]++ = TOKEN_ZERO_RUN(coeff, zero_run);
1434 311952 coeff_i += zero_run;
1435 } else {
1436
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 603358 if (!coeff_i)
1437 40795 s->all_fragments[fragment].dc = coeff;
1438
1439 603358 *s->dct_tokens[plane][coeff_i]++ = TOKEN_COEFF(coeff);
1440 }
1441 915310 coeff_i++;
1442
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 915310 if (coeff_i >= 64) /* > 64 occurs when there is a zero_run overflow */
1443 5090 return 0; /* stop */
1444 } else {
1445 ✗ av_log(s->avctx, AV_LOG_ERROR, "Invalid token %d\n", token);
1446 ✗ return -1;
1447 }
1448 }
1449 19171 *s->dct_tokens[plane][coeff_i]++ = TOKEN_EOB(0);
1450 19171 eob_tracker[coeff_i]--;
1451 19171 return 0;
1452 }
1453
1454 95328 static void vp4_dc_predictor_reset(VP4Predictor *p)
1455 {
1456 95328 p->dc = 0;
1457 95328 p->type = VP4_DC_UNDEFINED;
1458 95328 }
1459
1460 5568 static void vp4_dc_pred_before(const Vp3DecodeContext *s, VP4Predictor dc_pred[6][6], int sb_x)
1461 {
1462
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 27840 for (int i = 0; i < 4; i++)
1463 22272 dc_pred[0][i + 1] = s->dc_pred_row[sb_x * 4 + i];
1464
1465
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 27840 for (int j = 1; j < 5; j++)
1466
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 111360 for (int i = 0; i < 4; i++)
1467 89088 vp4_dc_predictor_reset(&dc_pred[j][i + 1]);
1468 5568 }
1469
1470 5568 static void vp4_dc_pred_after(Vp3DecodeContext *s, VP4Predictor dc_pred[6][6], int sb_x)
1471 {
1472
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 27840 for (int i = 0; i < 4; i++)
1473 22272 s->dc_pred_row[sb_x * 4 + i] = dc_pred[4][i + 1];
1474
1475
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 27840 for (int i = 1; i < 5; i++)
1476 22272 dc_pred[i][0] = dc_pred[i][4];
1477 5568 }
1478
1479 /* note: dc_pred points to the current block */
1480 63252 static int vp4_dc_pred(const Vp3DecodeContext *s, const VP4Predictor * dc_pred, const int * last_dc, int type, int plane)
1481 {
1482 63252 int count = 0;
1483 63252 int dc = 0;
1484
1485
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 63252 if (dc_pred[-6].type == type) {
1486 29726 dc += dc_pred[-6].dc;
1487 29726 count++;
1488 }
1489
1490
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 63252 if (dc_pred[6].type == type) {
1491 19581 dc += dc_pred[6].dc;
1492 19581 count++;
1493 }
1494
1495
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 63252 if (count != 2 && dc_pred[-1].type == type) {
1496 38121 dc += dc_pred[-1].dc;
1497 38121 count++;
1498 }
1499
1500
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 63252 if (count != 2 && dc_pred[1].type == type) {
1501 2073 dc += dc_pred[1].dc;
1502 2073 count++;
1503 }
1504
1505 /* using division instead of shift to correctly handle negative values */
1506
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 63252 return count == 2 ? dc / 2 : last_dc[type];
1507 }
1508
1509 48 static void vp4_set_tokens_base(Vp3DecodeContext *s)
1510 {
1511 48 int16_t *base = s->dct_tokens_base;
1512
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 192 for (int plane = 0; plane < 3; plane++) {
1513
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 9360 for (int i = 0; i < 64; i++) {
1514 9216 s->dct_tokens[plane][i] = base;
1515 9216 base += s->fragment_width[!!plane] * s->fragment_height[!!plane];
1516 }
1517 }
1518 48 }
1519
1520 24 static int vp4_unpack_dct_coeffs(Vp3DecodeContext *s, GetBitContext *gb)
1521 {
1522 24 const VLCElem *const *coeff_vlc = s->coeff_vlc->vlc_tabs;
1523 int dc_y_table;
1524 int dc_c_table;
1525 int ac_y_table;
1526 int ac_c_table;
1527 const VLCElem *tables[2][64];
1528 int eob_tracker[64];
1529 VP4Predictor dc_pred[6][6];
1530 int last_dc[NB_VP4_DC_TYPES];
1531
1532
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 24 if (get_bits_left(gb) < 16)
1533 ✗ return AVERROR_INVALIDDATA;
1534
1535 /* fetch the DC table indexes */
1536 24 dc_y_table = get_bits(gb, 4);
1537 24 dc_c_table = get_bits(gb, 4);
1538
1539 24 ac_y_table = get_bits(gb, 4);
1540 24 ac_c_table = get_bits(gb, 4);
1541
1542 /* build tables of DC/AC VLC tables */
1543
1544 /* DC table group */
1545 24 tables[0][0] = coeff_vlc[dc_y_table];
1546 24 tables[1][0] = coeff_vlc[dc_c_table];
1547
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 144 for (int i = 1; i <= 5; i++) {
1548 /* AC VLC table group 1 */
1549 120 tables[0][i] = coeff_vlc[ac_y_table + 16];
1550 120 tables[1][i] = coeff_vlc[ac_c_table + 16];
1551 }
1552
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 240 for (int i = 6; i <= 14; i++) {
1553 /* AC VLC table group 2 */
1554 216 tables[0][i] = coeff_vlc[ac_y_table + 32];
1555 216 tables[1][i] = coeff_vlc[ac_c_table + 32];
1556 }
1557
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 336 for (int i = 15; i <= 27; i++) {
1558 /* AC VLC table group 3 */
1559 312 tables[0][i] = coeff_vlc[ac_y_table + 48];
1560 312 tables[1][i] = coeff_vlc[ac_c_table + 48];
1561 }
1562
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 888 for (int i = 28; i <= 63; i++) {
1563 /* AC VLC table group 4 */
1564 864 tables[0][i] = coeff_vlc[ac_y_table + 64];
1565 864 tables[1][i] = coeff_vlc[ac_c_table + 64];
1566 }
1567
1568 24 vp4_set_tokens_base(s);
1569
1570 24 memset(last_dc, 0, sizeof(last_dc));
1571
1572
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 96 for (int plane = 0; plane < ((s->avctx->flags & AV_CODEC_FLAG_GRAY) ? 1 : 3); plane++) {
1573 72 memset(eob_tracker, 0, sizeof(eob_tracker));
1574
1575 /* initialise dc prediction */
1576
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 3720 for (int i = 0; i < s->fragment_width[!!plane]; i++)
1577 3648 vp4_dc_predictor_reset(&s->dc_pred_row[i]);
1578
1579
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 504 for (int j = 0; j < 6; j++)
1580
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 3024 for (int i = 0; i < 6; i++)
1581 2592 vp4_dc_predictor_reset(&dc_pred[j][i]);
1582
1583
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 456 for (int sb_y = 0; sb_y * 4 < s->fragment_height[!!plane]; sb_y++) {
1584
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 5952 for (int sb_x = 0; sb_x *4 < s->fragment_width[!!plane]; sb_x++) {
1585 5568 vp4_dc_pred_before(s, dc_pred, sb_x);
1586
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 94656 for (int j = 0; j < 16; j++) {
1587 89088 int hx = hilbert_offset[j][0];
1588 89088 int hy = hilbert_offset[j][1];
1589 89088 int x = 4 * sb_x + hx;
1590 89088 int y = 4 * sb_y + hy;
1591 89088 VP4Predictor *this_dc_pred = &dc_pred[hy + 1][hx + 1];
1592 int fragment, dc_block_type;
1593
1594
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 89088 if (x >= s->fragment_width[!!plane] || y >= s->fragment_height[!!plane])
1595 1536 continue;
1596
1597 87552 fragment = s->fragment_start[plane] + y * s->fragment_width[!!plane] + x;
1598
1599
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 87552 if (s->all_fragments[fragment].coding_method == MODE_COPY)
1600 24300 continue;
1601
1602
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 63252 if (vp4_unpack_vlcs(s, gb, tables[!!plane], plane, eob_tracker, fragment) < 0)
1603 ✗ return -1;
1604
1605 63252 dc_block_type = vp4_pred_block_type_map[s->all_fragments[fragment].coding_method];
1606
1607 63252 s->all_fragments[fragment].dc +=
1608 63252 vp4_dc_pred(s, this_dc_pred, last_dc, dc_block_type, plane);
1609
1610 63252 this_dc_pred->type = dc_block_type,
1611 63252 this_dc_pred->dc = last_dc[dc_block_type] = s->all_fragments[fragment].dc;
1612 }
1613 5568 vp4_dc_pred_after(s, dc_pred, sb_x);
1614 }
1615 }
1616 }
1617
1618 24 vp4_set_tokens_base(s);
1619
1620 24 return 0;
1621 }
1622 #endif
1623
1624 /*
1625 * This function reverses the DC prediction for each coded fragment in
1626 * the frame. Much of this function is adapted directly from the original
1627 * VP3 source code.
1628 */
1629 #define COMPATIBLE_FRAME(x) \
1630 (compatible_frame[s->all_fragments[x].coding_method] == current_frame_type)
1631 #define DC_COEFF(u) s->all_fragments[u].dc
1632
1633 420 static void reverse_dc_prediction(Vp3DecodeContext *s,
1634 int first_fragment,
1635 int fragment_width,
1636 int fragment_height)
1637 {
1638 #define PUL 8
1639 #define PU 4
1640 #define PUR 2
1641 #define PL 1
1642
1643 420 int i = first_fragment;
1644
1645 int predicted_dc;
1646
1647 /* DC values for the left, up-left, up, and up-right fragments */
1648 int vl, vul, vu, vur;
1649
1650 /* indexes for the left, up-left, up, and up-right fragments */
1651 int l, ul, u, ur;
1652
1653 /*
1654 * The 6 fields mean:
1655 * 0: up-left multiplier
1656 * 1: up multiplier
1657 * 2: up-right multiplier
1658 * 3: left multiplier
1659 */
1660 static const int predictor_transform[16][4] = {
1661 { 0, 0, 0, 0 },
1662 { 0, 0, 0, 128 }, // PL
1663 { 0, 0, 128, 0 }, // PUR
1664 { 0, 0, 53, 75 }, // PUR|PL
1665 { 0, 128, 0, 0 }, // PU
1666 { 0, 64, 0, 64 }, // PU |PL
1667 { 0, 128, 0, 0 }, // PU |PUR
1668 { 0, 0, 53, 75 }, // PU |PUR|PL
1669 { 128, 0, 0, 0 }, // PUL
1670 { 0, 0, 0, 128 }, // PUL|PL
1671 { 64, 0, 64, 0 }, // PUL|PUR
1672 { 0, 0, 53, 75 }, // PUL|PUR|PL
1673 { 0, 128, 0, 0 }, // PUL|PU
1674 { -104, 116, 0, 116 }, // PUL|PU |PL
1675 { 24, 80, 24, 0 }, // PUL|PU |PUR
1676 { -104, 116, 0, 116 } // PUL|PU |PUR|PL
1677 };
1678
1679 /* This table shows which types of blocks can use other blocks for
1680 * prediction. For example, INTRA is the only mode in this table to
1681 * have a frame number of 0. That means INTRA blocks can only predict
1682 * from other INTRA blocks. There are 2 golden frame coding types;
1683 * blocks encoding in these modes can only predict from other blocks
1684 * that were encoded with these 1 of these 2 modes. */
1685 static const unsigned char compatible_frame[9] = {
1686 1, /* MODE_INTER_NO_MV */
1687 0, /* MODE_INTRA */
1688 1, /* MODE_INTER_PLUS_MV */
1689 1, /* MODE_INTER_LAST_MV */
1690 1, /* MODE_INTER_PRIOR_MV */
1691 2, /* MODE_USING_GOLDEN */
1692 2, /* MODE_GOLDEN_MV */
1693 1, /* MODE_INTER_FOUR_MV */
1694 3 /* MODE_COPY */
1695 };
1696 int current_frame_type;
1697
1698 /* there is a last DC predictor for each of the 3 frame types */
1699 short last_dc[3];
1700
1701 420 int transform = 0;
1702
1703 420 vul =
1704 420 vu =
1705 420 vur =
1706 420 vl = 0;
1707 420 last_dc[0] =
1708 420 last_dc[1] =
1709 420 last_dc[2] = 0;
1710
1711 /* for each fragment row... */
1712
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 14292 for (int y = 0; y < fragment_height; y++) {
1713 /* for each fragment in a row... */
1714
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 1774512 for (int x = 0; x < fragment_width; x++, i++) {
1715
1716 /* reverse prediction if this block was coded */
1717
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 1760640 if (s->all_fragments[i].coding_method != MODE_COPY) {
1718 532576 current_frame_type =
1719 532576 compatible_frame[s->all_fragments[i].coding_method];
1720
1721 532576 transform = 0;
1722
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 532576 if (x) {
1723 528445 l = i - 1;
1724 528445 vl = DC_COEFF(l);
1725
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 528445 if (COMPATIBLE_FRAME(l))
1726 483186 transform |= PL;
1727 }
1728
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 532576 if (y) {
1729 513468 u = i - fragment_width;
1730 513468 vu = DC_COEFF(u);
1731
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 513468 if (COMPATIBLE_FRAME(u))
1732 476069 transform |= PU;
1733
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 513468 if (x) {
1734 509661 ul = i - fragment_width - 1;
1735 509661 vul = DC_COEFF(ul);
1736
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 509661 if (COMPATIBLE_FRAME(ul))
1737 461368 transform |= PUL;
1738 }
1739
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 513468 if (x + 1 < fragment_width) {
1740 505812 ur = i - fragment_width + 1;
1741 505812 vur = DC_COEFF(ur);
1742
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 505812 if (COMPATIBLE_FRAME(ur))
1743 459980 transform |= PUR;
1744 }
1745 }
1746
1747
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 532576 if (transform == 0) {
1748 /* if there were no fragments to predict from, use last
1749 * DC saved */
1750 10817 predicted_dc = last_dc[current_frame_type];
1751 } else {
1752 /* apply the appropriate predictor transform */
1753 521759 predicted_dc =
1754 521759 (predictor_transform[transform][0] * vul) +
1755 521759 (predictor_transform[transform][1] * vu) +
1756 521759 (predictor_transform[transform][2] * vur) +
1757 521759 (predictor_transform[transform][3] * vl);
1758
1759 521759 predicted_dc /= 128;
1760
1761 /* check for outranging on the [ul u l] and
1762 * [ul u ur l] predictors */
1763
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 521759 if ((transform == 15) || (transform == 13)) {
1764
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 434711 if (FFABS(predicted_dc - vu) > 128)
1765 2351 predicted_dc = vu;
1766
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 432360 else if (FFABS(predicted_dc - vl) > 128)
1767 1111 predicted_dc = vl;
1768
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 431249 else if (FFABS(predicted_dc - vul) > 128)
1769 2253 predicted_dc = vul;
1770 }
1771 }
1772
1773 /* at long last, apply the predictor */
1774 532576 DC_COEFF(i) += predicted_dc;
1775 /* save the DC */
1776 532576 last_dc[current_frame_type] = DC_COEFF(i);
1777 }
1778 }
1779 }
1780 420 }
1781
1782 2700 static void apply_loop_filter(Vp3DecodeContext *s, int plane,
1783 int ystart, int yend)
1784 {
1785 2700 int *bounding_values = s->bounding_values_array + 127;
1786
1787 2700 int width = s->fragment_width[!!plane];
1788 2700 int height = s->fragment_height[!!plane];
1789 2700 int fragment = s->fragment_start[plane] + ystart * width;
1790 2700 ptrdiff_t stride = s->current_frame.f->linesize[plane];
1791 2700 uint8_t *plane_data = s->current_frame.f->data[plane];
1792
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 2700 if (!s->flipped_image)
1793 2700 stride = -stride;
1794 2700 plane_data += s->data_offset[plane] + 8 * ystart * stride;
1795
1796
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 10530 for (int y = ystart; y < yend; y++) {
1797
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 486710 for (int x = 0; x < width; x++) {
1798 /* This code basically just deblocks on the edges of coded blocks.
1799 * However, it has to be much more complicated because of the
1800 * brain damaged deblock ordering used in VP3/Theora. Order matters
1801 * because some pixels get filtered twice. */
1802
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 478880 if (s->all_fragments[fragment].coding_method != MODE_COPY) {
1803 /* do not perform left edge filter for left columns frags */
1804
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 367025 if (x > 0) {
1805 363601 s->vp3dsp.h_loop_filter(
1806 363601 plane_data + 8 * x,
1807 stride, bounding_values);
1808 }
1809
1810 /* do not perform top edge filter for top row fragments */
1811
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 367025 if (y > 0) {
1812 349625 s->vp3dsp.v_loop_filter(
1813 349625 plane_data + 8 * x,
1814 stride, bounding_values);
1815 }
1816
1817 /* do not perform right edge filter for right column
1818 * fragments or if right fragment neighbor is also coded
1819 * in this frame (it will be filtered in next iteration) */
1820
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 367025 if ((x < width - 1) &&
1821
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 359725 (s->all_fragments[fragment + 1].coding_method == MODE_COPY)) {
1822 32268 s->vp3dsp.h_loop_filter(
1823 32268 plane_data + 8 * x + 8,
1824 stride, bounding_values);
1825 }
1826
1827 /* do not perform bottom edge filter for bottom row
1828 * fragments or if bottom fragment neighbor is also coded
1829 * in this frame (it will be filtered in the next row) */
1830
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 367025 if ((y < height - 1) &&
1831
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 352272 (s->all_fragments[fragment + width].coding_method == MODE_COPY)) {
1832 32946 s->vp3dsp.v_loop_filter(
1833 32946 plane_data + 8 * x + 8 * stride,
1834 stride, bounding_values);
1835 }
1836 }
1837
1838 478880 fragment++;
1839 }
1840 7830 plane_data += 8 * stride;
1841 }
1842 2700 }
1843
1844 /**
1845 * Pull DCT tokens from the 64 levels to decode and dequant the coefficients
1846 * for the next block in coding order
1847 */
1848 595828 static inline int vp3_dequant(Vp3DecodeContext *s, const Vp3Fragment *frag,
1849 int plane, int inter, int16_t block[64])
1850 {
1851 595828 const int16_t *dequantizer = s->qmat[frag->qpi][inter][plane];
1852 595828 const uint8_t *perm = s->idct_scantable;
1853 595828 int i = 0;
1854
1855 do {
1856 3343039 int token = *s->dct_tokens[plane][i];
1857
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 3343039 switch (token & 3) {
1858 587550 case 0: // EOB
1859
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 587550 if (--token < 4) // 0-3 are token types so the EOB run must now be 0
1860 280242 s->dct_tokens[plane][i]++;
1861 else
1862 307308 *s->dct_tokens[plane][i] = token & ~3;
1863 587550 goto end;
1864 913868 case 1: // zero run
1865 913868 s->dct_tokens[plane][i]++;
1866 913868 i += (token >> 2) & 0x7f;
1867
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 913868 if (i > 63) {
1868 ✗ av_log(s->avctx, AV_LOG_ERROR, "Coefficient index overflow\n");
1869 ✗ return i;
1870 }
1871 913868 block[perm[i]] = (token >> 9) * dequantizer[perm[i]];
1872 913868 i++;
1873 913868 break;
1874 1841621 case 2: // coeff
1875 1841621 block[perm[i]] = (token >> 2) * dequantizer[perm[i]];
1876 1841621 s->dct_tokens[plane][i++]++;
1877 1841621 break;
1878 ✗ default: // shouldn't happen
1879 ✗ return i;
1880 }
1881
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 2755489 } while (i < 64);
1882 // return value is expected to be a valid level
1883 8278 i--;
1884 595828 end:
1885 // the actual DC+prediction is in the fragment structure
1886 595828 block[0] = frag->dc * s->qmat[0][inter][plane][0];
1887 595828 return i;
1888 }
1889
1890 /**
1891 * called when all pixels up to row y are complete
1892 */
1893 1232 static void vp3_draw_horiz_band(Vp3DecodeContext *s, int y)
1894 {
1895 int h, cy;
1896 int offset[AV_NUM_DATA_POINTERS];
1897
1898
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 1232 if (HAVE_THREADS && s->avctx->active_thread_type & FF_THREAD_FRAME) {
1899 ✗ int y_flipped = s->flipped_image ? s->height - y : y;
1900
1901 /* At the end of the frame, report INT_MAX instead of the height of
1902 * the frame. This makes the other threads' ff_thread_await_progress()
1903 * calls cheaper, because they don't have to clip their values. */
1904 ✗ ff_progress_frame_report(&s->current_frame,
1905 ✗ y_flipped == s->height ? INT_MAX
1906 : y_flipped - 1);
1907 }
1908
1909
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 1232 if (!s->avctx->draw_horiz_band)
1910 1232 return;
1911
1912 ✗ h = y - s->last_slice_end;
1913 ✗ s->last_slice_end = y;
1914 ✗ y -= h;
1915
1916 ✗ if (!s->flipped_image)
1917 ✗ y = s->height - y - h;
1918
1919 ✗ cy = y >> s->chroma_y_shift;
1920 ✗ offset[0] = s->current_frame.f->linesize[0] * y;
1921 ✗ offset[1] = s->current_frame.f->linesize[1] * cy;
1922 ✗ offset[2] = s->current_frame.f->linesize[2] * cy;
1923 ✗ for (int i = 3; i < AV_NUM_DATA_POINTERS; i++)
1924 ✗ offset[i] = 0;
1925
1926 ✗ s->avctx->draw_horiz_band(s->avctx, s->current_frame.f, offset, y, 3, h);
1927 }
1928
1929 /**
1930 * Wait for the reference frame of the current fragment.
1931 * The progress value is in luma pixel rows.
1932 */
1933 ✗ static void await_reference_row(Vp3DecodeContext *s, const Vp3Fragment *fragment,
1934 int motion_y, int y)
1935 {
1936 const ProgressFrame *ref_frame;
1937 int ref_row;
1938 ✗ int border = motion_y & 1;
1939
1940 ✗ if (fragment->coding_method == MODE_USING_GOLDEN ||
1941 ✗ fragment->coding_method == MODE_GOLDEN_MV)
1942 ✗ ref_frame = &s->golden_frame;
1943 else
1944 ✗ ref_frame = &s->last_frame;
1945
1946 ✗ ref_row = y + (motion_y >> 1);
1947 ✗ ref_row = FFMAX(FFABS(ref_row), ref_row + 8 + border);
1948
1949 ✗ ff_progress_frame_await(ref_frame, ref_row);
1950 ✗ }
1951
1952 #if CONFIG_VP4_DECODER
1953 /**
1954 * @return non-zero if temp (edge_emu_buffer) was populated
1955 */
1956 36568 static int vp4_mc_loop_filter(Vp3DecodeContext *s, int plane, int motion_x, int motion_y, int bx, int by,
1957 const uint8_t *motion_source, ptrdiff_t stride,
1958 int src_x, int src_y, uint8_t *temp)
1959 {
1960
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 36568 int motion_shift = plane ? 4 : 2;
1961
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 36568 int subpel_mask = plane ? 3 : 1;
1962 36568 int *bounding_values = s->bounding_values_array + 127;
1963
1964 int x, y;
1965 int x2, y2;
1966 int x_subpel, y_subpel;
1967 int x_offset, y_offset;
1968
1969
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 36568 int block_width = plane ? 8 : 16;
1970
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 36568 int plane_width = s->width >> (plane && s->chroma_x_shift);
1971
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 36568 int plane_height = s->height >> (plane && s->chroma_y_shift);
1972
1973 #define loop_stride 12
1974 uint8_t loop[12 * loop_stride];
1975
1976 /* using division instead of shift to correctly handle negative values */
1977 36568 x = 8 * bx + motion_x / motion_shift;
1978 36568 y = 8 * by + motion_y / motion_shift;
1979
1980 36568 x_subpel = motion_x & subpel_mask;
1981 36568 y_subpel = motion_y & subpel_mask;
1982
1983
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 36568 if (x_subpel || y_subpel) {
1984 30063 x--;
1985 30063 y--;
1986
1987
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 30063 if (x_subpel)
1988
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 22774 x = FFMIN(x, x + FFSIGN(motion_x));
1989
1990
2/2
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 30063 if (y_subpel)
1991
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 15343 y = FFMIN(y, y + FFSIGN(motion_y));
1992
1993 30063 x2 = x + block_width;
1994 30063 y2 = y + block_width;
1995
1996
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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)
1997 596 return 0;
1998
1999 29467 x_offset = (-(x + 2) & 7) + 2;
2000 29467 y_offset = (-(y + 2) & 7) + 2;
2001
2002 av_assert1(!(x_offset > 8 + x_subpel && y_offset > 8 + y_subpel));
2003
2004 29467 s->vdsp.emulated_edge_mc(loop, motion_source - stride - 1,
2005 loop_stride, stride,
2006 12, 12, src_x - 1, src_y - 1,
2007 plane_width,
2008 plane_height);
2009
2010
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 29467 if (x_offset <= 8 + x_subpel)
2011 25000 ff_vp3dsp_h_loop_filter_12(loop + x_offset, loop_stride, bounding_values);
2012
2013
2/2
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 29467 if (y_offset <= 8 + y_subpel)
2014 17032 ff_vp3dsp_v_loop_filter_12(loop + y_offset*loop_stride, loop_stride, bounding_values);
2015
2016 } else {
2017
2018 6505 x_offset = -x & 7;
2019 6505 y_offset = -y & 7;
2020
2021
4/4
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 6505 if (!x_offset && !y_offset)
2022 118 return 0;
2023
2024 6387 s->vdsp.emulated_edge_mc(loop, motion_source - stride - 1,
2025 loop_stride, stride,
2026 12, 12, src_x - 1, src_y - 1,
2027 plane_width,
2028 plane_height);
2029
2030 #define safe_loop_filter(name, ptr, stride, bounding_values) \
2031 if (VP3_LOOP_FILTER_NO_UNALIGNED_SUPPORT && (uintptr_t)(ptr) & 7) \
2032 s->vp3dsp.name##_unaligned(ptr, stride, bounding_values); \
2033 else \
2034 s->vp3dsp.name(ptr, stride, bounding_values);
2035
2036
2/2
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 6387 if (x_offset)
2037 5671 safe_loop_filter(h_loop_filter, loop + loop_stride + x_offset + 1, loop_stride, bounding_values);
2038
2039
2/2
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 6387 if (y_offset)
2040 3055 safe_loop_filter(v_loop_filter, loop + (y_offset + 1)*loop_stride + 1, loop_stride, bounding_values);
2041 }
2042
2043
2/2
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 358540 for (int i = 0; i < 9; i++)
2044 322686 memcpy(temp + i*stride, loop + (i + 1) * loop_stride + 1, 9);
2045
2046 35854 return 1;
2047 }
2048 #endif
2049
2050 /*
2051 * Perform the final rendering for a particular slice of data.
2052 * The slice number ranges from 0..(c_superblock_height - 1).
2053 */
2054 1068 static void render_slice(Vp3DecodeContext *s, int slice)
2055 {
2056 1068 int16_t *block = s->block;
2057 1068 int motion_x = 0xdeadbeef, motion_y = 0xdeadbeef;
2058 /* When decoding keyframes, the earlier frames may not be available,
2059 * so we just use the current frame in this case instead;
2060 * it also avoid using undefined pointer arithmetic. Nothing is
2061 * ever read from these frames in case of a keyframe. */
2062
2/2
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 1068 const AVFrame *last_frame = s->last_frame.f ?
2063 s->last_frame.f : s->current_frame.f;
2064
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✗ Branch 1 not taken.
 1068 const AVFrame *golden_frame = s->golden_frame.f ?
2065 s->golden_frame.f : s->current_frame.f;
2066 int motion_halfpel_index;
2067 int first_pixel;
2068
2069
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 1068 if (slice >= s->c_superblock_height)
2070 ✗ return;
2071
2072
2/2
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 4272 for (int plane = 0; plane < 3; plane++) {
2073 3204 uint8_t *output_plane = s->current_frame.f->data[plane] +
2074 3204 s->data_offset[plane];
2075 3204 const uint8_t *last_plane = last_frame->data[plane] +
2076 3204 s->data_offset[plane];
2077 3204 const uint8_t *golden_plane = golden_frame->data[plane] +
2078 3204 s->data_offset[plane];
2079 3204 ptrdiff_t stride = s->current_frame.f->linesize[plane];
2080
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 3204 int plane_width = s->width >> (plane && s->chroma_x_shift);
2081
3/4
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 3204 int plane_height = s->height >> (plane && s->chroma_y_shift);
2082 3204 const int8_t (*motion_val)[2] = s->motion_val[!!plane];
2083
2084
3/4
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 3204 int sb_y = slice << (!plane && s->chroma_y_shift);
2085
3/4
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 3204 int slice_height = sb_y + 1 + (!plane && s->chroma_y_shift);
2086 3204 int slice_width = plane ? s->c_superblock_width
2087
2/2
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✓ Branch 1 taken 1068 times.
 3204 : s->y_superblock_width;
2088
2089 3204 int fragment_width = s->fragment_width[!!plane];
2090 3204 int fragment_height = s->fragment_height[!!plane];
2091 3204 int fragment_start = s->fragment_start[plane];
2092
2093
2/2
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 4272 int do_await = !plane && HAVE_THREADS &&
2094
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 1068 (s->avctx->active_thread_type & FF_THREAD_FRAME);
2095
2096
1/2
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✗ Branch 1 not taken.
 3204 if (!s->flipped_image)
2097 3204 stride = -stride;
2098 if (CONFIG_GRAY && plane && (s->avctx->flags & AV_CODEC_FLAG_GRAY))
2099 continue;
2100
2101 /* for each superblock row in the slice (both of them)... */
2102
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 7476 for (; sb_y < slice_height; sb_y++) {
2103 /* for each superblock in a row... */
2104
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 129560 for (int sb_x = 0; sb_x < slice_width; sb_x++) {
2105 /* for each block in a superblock... */
2106
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 2129896 for (int j = 0; j < 16; j++) {
2107 2004608 int x = 4 * sb_x + hilbert_offset[j][0];
2108 2004608 int y = 4 * sb_y + hilbert_offset[j][1];
2109 2004608 int fragment = y * fragment_width + x;
2110
2111 2004608 int i = fragment_start + fragment;
2112
2113 // bounds check
2114
4/4
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 2004608 if (x >= fragment_width || y >= fragment_height)
2115 156416 continue;
2116
2117 1848192 first_pixel = 8 * y * stride + 8 * x;
2118
2119
1/2
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✓ Branch 1 taken 1848192 times.
 1848192 if (do_await &&
2120 ✗ s->all_fragments[i].coding_method != MODE_INTRA)
2121 ✗ await_reference_row(s, &s->all_fragments[i],
2122 ✗ motion_val[fragment][1],
2123 ✗ (16 * y) >> s->chroma_y_shift);
2124
2125 /* transform if this block was coded */
2126
2/2
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✓ Branch 1 taken 1252364 times.
 1848192 if (s->all_fragments[i].coding_method != MODE_COPY) {
2127 const uint8_t *motion_source;
2128
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✓ Branch 1 taken 3646 times.
 595828 if ((s->all_fragments[i].coding_method == MODE_USING_GOLDEN) ||
2129
2/2
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✓ Branch 1 taken 588143 times.
 592182 (s->all_fragments[i].coding_method == MODE_GOLDEN_MV))
2130 7685 motion_source = golden_plane;
2131 else
2132 588143 motion_source = last_plane;
2133
2134 595828 motion_source += first_pixel;
2135 595828 motion_halfpel_index = 0;
2136
2137 /* sort out the motion vector if this fragment is coded
2138 * using a motion vector method */
2139
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✓ Branch 1 taken 217992 times.
 595828 if ((s->all_fragments[i].coding_method > MODE_INTRA) &&
2140
2/2
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✓ Branch 1 taken 3646 times.
 377836 (s->all_fragments[i].coding_method != MODE_USING_GOLDEN)) {
2141 int src_x, src_y;
2142 374190 int standard_mc = 1;
2143 374190 motion_x = motion_val[fragment][0];
2144 374190 motion_y = motion_val[fragment][1];
2145 #if CONFIG_VP4_DECODER
2146
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 374190 if (plane && s->version >= 2) {
2147 11931 motion_x = (motion_x >> 1) | (motion_x & 1);
2148 11931 motion_y = (motion_y >> 1) | (motion_y & 1);
2149 }
2150 #endif
2151
2152 374190 src_x = (motion_x >> 1) + 8 * x;
2153 374190 src_y = (motion_y >> 1) + 8 * y;
2154
2155 374190 motion_halfpel_index = motion_x & 0x01;
2156 374190 motion_source += (motion_x >> 1);
2157
2158 374190 motion_halfpel_index |= (motion_y & 0x01) << 1;
2159 374190 motion_source += ((motion_y >> 1) * stride);
2160
2161 #if CONFIG_VP4_DECODER
2162
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 374190 if (s->version >= 2) {
2163 36568 uint8_t *temp = s->edge_emu_buffer;
2164
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✗ Branch 1 not taken.
 36568 if (stride < 0)
2165 36568 temp -= 8 * stride;
2166
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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)) {
2167 35854 motion_source = temp;
2168 35854 standard_mc = 0;
2169 }
2170 }
2171 #endif
2172
2173
4/4
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 374190 if (standard_mc && (
2174
2/2
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 336975 src_x < 0 || src_y < 0 ||
2175
2/2
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 322220 src_x + 9 >= plane_width ||
2176
2/2
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 315161 src_y + 9 >= plane_height)) {
2177 34786 uint8_t *temp = s->edge_emu_buffer;
2178
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✗ Branch 1 not taken.
 34786 if (stride < 0)
2179 34786 temp -= 8 * stride;
2180
2181 34786 s->vdsp.emulated_edge_mc(temp, motion_source,
2182 stride, stride,
2183 9, 9, src_x, src_y,
2184 plane_width,
2185 plane_height);
2186 34786 motion_source = temp;
2187 }
2188 }
2189
2190 /* first, take care of copying a block from either the
2191 * previous or the golden frame */
2192
2/2
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 595828 if (s->all_fragments[i].coding_method != MODE_INTRA) {
2193 /* Note, it is possible to implement all MC cases
2194 * with put_no_rnd_pixels_l2 which would look more
2195 * like the VP3 source but this would be slower as
2196 * put_no_rnd_pixels_tab is better optimized */
2197
2/2
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 411494 if (motion_halfpel_index != 3) {
2198 293916 s->hdsp.put_no_rnd_pixels_tab[1][motion_halfpel_index](
2199 output_plane + first_pixel,
2200 motion_source, stride, 8);
2201 } else {
2202 /* d is 0 if motion_x and _y have the same sign,
2203 * else -1 */
2204 117578 int d = (motion_x ^ motion_y) >> 31;
2205 117578 s->vp3dsp.put_no_rnd_pixels_l2(output_plane + first_pixel,
2206 117578 motion_source - d,
2207 117578 motion_source + stride + 1 + d,
2208 stride, 8);
2209 }
2210 }
2211
2212 /* invert DCT and place (or add) in final output */
2213
2214
2/2
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 595828 if (s->all_fragments[i].coding_method == MODE_INTRA) {
2215 184334 vp3_dequant(s, s->all_fragments + i,
2216 plane, 0, block);
2217 184334 s->vp3dsp.idct_put(output_plane + first_pixel,
2218 stride,
2219 block);
2220 } else {
2221
2/2
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✓ Branch 2 taken 127148 times.
 411494 if (vp3_dequant(s, s->all_fragments + i,
2222 plane, 1, block)) {
2223 284346 s->vp3dsp.idct_add(output_plane + first_pixel,
2224 stride,
2225 block);
2226 } else {
2227 127148 s->vp3dsp.idct_dc_add(output_plane + first_pixel,
2228 stride, block);
2229 }
2230 }
2231 } else {
2232 /* copy directly from the previous frame */
2233 1252364 s->hdsp.put_pixels_tab[1][0](
2234 output_plane + first_pixel,
2235 last_plane + first_pixel,
2236 stride, 8);
2237 }
2238 }
2239 }
2240
2241 // Filter up to the last row in the superblock row
2242
4/4
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✓ Branch 3 taken 1608 times.
 4272 if (s->version < 2 && !s->skip_loop_filter)
2243 2280 apply_loop_filter(s, plane, 4 * sb_y - !!sb_y,
2244
2/2
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✓ Branch 1 taken 1824 times.
 2280 FFMIN(4 * sb_y + 3, fragment_height - 1));
2245 }
2246 }
2247
2248 /* this looks like a good place for slice dispatch... */
2249 /* algorithm:
2250 * if (slice == s->macroblock_height - 1)
2251 * dispatch (both last slice & 2nd-to-last slice);
2252 * else if (slice > 0)
2253 * dispatch (slice - 1);
2254 */
2255
2256
2/2
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 1068 vp3_draw_horiz_band(s, FFMIN((32 << s->chroma_y_shift) * (slice + 1) - 16,
2257 s->height - 16));
2258 }
2259
2260 11 static av_cold void init_tables_once(void)
2261 {
2262 11 VLCInitState state = VLC_INIT_STATE(mode_code_vlc);
2263
2264 11 VLC_INIT_STATIC_TABLE_FROM_LENGTHS(superblock_run_length_vlc,
2265 SUPERBLOCK_VLC_BITS, 34,
2266 superblock_run_length_vlc_lens, 1,
2267 NULL, 0, 0, 1, 0);
2268
2269 11 VLC_INIT_STATIC_TABLE_FROM_LENGTHS(fragment_run_length_vlc, 5, 30,
2270 fragment_run_length_vlc_len, 1,
2271 NULL, 0, 0, 0, 0);
2272
2273 11 VLC_INIT_STATIC_TABLE_FROM_LENGTHS(motion_vector_vlc, VP3_MV_VLC_BITS, 63,
2274 &motion_vector_vlc_table[0][1], 2,
2275 &motion_vector_vlc_table[0][0], 2, 1,
2276 -31, 0);
2277
2278 11 ff_vlc_init_tables_from_lengths(&state, 4, 8,
2279 mode_code_vlc_len, 1,
2280 NULL, 0, 0, 0, 0);
2281
2282 #if CONFIG_VP4_DECODER
2283
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 33 for (int j = 0; j < 2; j++)
2284
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 176 for (int i = 0; i < 7; i++) {
2285 154 vp4_mv_vlc_table[j][i] =
2286 154 ff_vlc_init_tables_from_lengths(&state, VP4_MV_VLC_BITS, 63,
2287 154 &vp4_mv_vlc[j][i][0][1], 2,
2288 154 &vp4_mv_vlc[j][i][0][0], 2, 1,
2289 -31, 0);
2290 }
2291
2292 /* version >= 2 */
2293
2/2
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 33 for (int i = 0; i < 2; i++) {
2294 22 block_pattern_vlc[i] =
2295 22 ff_vlc_init_tables(&state, 5, 14,
2296 22 &vp4_block_pattern_vlc[i][0][1], 2, 1,
2297 22 &vp4_block_pattern_vlc[i][0][0], 2, 1, 0);
2298 }
2299 #endif
2300 11 }
2301
2302 /// Allocate tables for per-frame data in Vp3DecodeContext
2303 35 static av_cold int allocate_tables(AVCodecContext *avctx)
2304 {
2305 35 Vp3DecodeContext *s = avctx->priv_data;
2306 int y_fragment_count, c_fragment_count;
2307
2308 35 free_tables(avctx);
2309
2310 35 y_fragment_count = s->fragment_width[0] * s->fragment_height[0];
2311 35 c_fragment_count = s->fragment_width[1] * s->fragment_height[1];
2312
2313 /* superblock_coding is used by unpack_superblocks (VP3/Theora) and vp4_unpack_macroblocks (VP4) */
2314 35 s->superblock_coding = av_mallocz(FFMAX(s->superblock_count, s->yuv_macroblock_count));
2315 35 s->all_fragments = av_calloc(s->fragment_count, sizeof(*s->all_fragments));
2316
2317 35 s-> kf_coded_fragment_list = av_calloc(s->fragment_count, sizeof(int));
2318 35 s->nkf_coded_fragment_list = av_calloc(s->fragment_count, sizeof(int));
2319 35 memset(s-> num_kf_coded_fragment, -1, sizeof(s-> num_kf_coded_fragment));
2320
2321 35 s->dct_tokens_base = av_calloc(s->fragment_count,
2322 64 * sizeof(*s->dct_tokens_base));
2323 35 s->motion_val[0] = av_calloc(y_fragment_count, sizeof(*s->motion_val[0]));
2324 35 s->motion_val[1] = av_calloc(c_fragment_count, sizeof(*s->motion_val[1]));
2325
2326 /* work out the block mapping tables */
2327 35 s->superblock_fragments = av_calloc(s->superblock_count, 16 * sizeof(int));
2328 35 s->macroblock_coding = av_mallocz(s->macroblock_count + 1);
2329
2330 35 s->dc_pred_row = av_malloc_array(s->y_superblock_width * 4, sizeof(*s->dc_pred_row));
2331
2332
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 35 if (!s->superblock_coding || !s->all_fragments ||
2333
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 35 !s->dct_tokens_base || !s->kf_coded_fragment_list ||
2334
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 35 !s->nkf_coded_fragment_list ||
2335
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 35 !s->superblock_fragments || !s->macroblock_coding ||
2336
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 35 !s->dc_pred_row ||
2337
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 35 !s->motion_val[0] || !s->motion_val[1]) {
2338 ✗ return -1;
2339 }
2340
2341 35 init_block_mapping(s);
2342
2343 35 return 0;
2344 }
2345
2346
2347 35 static av_cold void free_vlc_tables(AVRefStructOpaque unused, void *obj)
2348 {
2349 35 CoeffVLCs *vlcs = obj;
2350
2351
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 2835 for (int i = 0; i < FF_ARRAY_ELEMS(vlcs->vlcs); i++)
2352 2800 ff_vlc_free(&vlcs->vlcs[i]);
2353 35 }
2354
2355 35 static av_cold int vp3_decode_init(AVCodecContext *avctx)
2356 {
2357 static AVOnce init_static_once = AV_ONCE_INIT;
2358 35 Vp3DecodeContext *s = avctx->priv_data;
2359 int ret;
2360 int c_width;
2361 int c_height;
2362 int y_fragment_count, c_fragment_count;
2363
2364
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 35 if (avctx->codec_tag == MKTAG('V', 'P', '4', '0')) {
2365 2 s->version = 3;
2366 #if !CONFIG_VP4_DECODER
2367 av_log(avctx, AV_LOG_ERROR, "This build does not support decoding VP4.\n");
2368 return AVERROR_DECODER_NOT_FOUND;
2369 #endif
2370
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 33 } else if (avctx->codec_tag == MKTAG('V', 'P', '3', '0'))
2371 ✗ s->version = 0;
2372 else
2373 33 s->version = 1;
2374
2375 35 s->avctx = avctx;
2376 35 s->width = FFALIGN(avctx->coded_width, 16);
2377 35 s->height = FFALIGN(avctx->coded_height, 16);
2378
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 35 if (s->width < 18)
2379 ✗ return AVERROR_PATCHWELCOME;
2380
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 35 if (avctx->codec_id != AV_CODEC_ID_THEORA)
2381 5 avctx->pix_fmt = AV_PIX_FMT_YUV420P;
2382 35 avctx->chroma_sample_location = AVCHROMA_LOC_CENTER;
2383 35 ff_hpeldsp_init(&s->hdsp, avctx->flags | AV_CODEC_FLAG_BITEXACT);
2384 35 ff_videodsp_init(&s->vdsp, 8);
2385 35 ff_vp3dsp_init(&s->vp3dsp);
2386
2387
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 2275 for (int i = 0; i < 64; i++) {
2388 #define TRANSPOSE(x) (((x) >> 3) | (((x) & 7) << 3))
2389 2240 s->idct_permutation[i] = TRANSPOSE(i);
2390 2240 s->idct_scantable[i] = TRANSPOSE(ff_zigzag_direct[i]);
2391 #undef TRANSPOSE
2392 }
2393
2394 /* initialize to an impossible value which will force a recalculation
2395 * in the first frame decode */
2396
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 140 for (int i = 0; i < 3; i++)
2397 105 s->qps[i] = -1;
2398
2399 35 ret = av_pix_fmt_get_chroma_sub_sample(avctx->pix_fmt, &s->chroma_x_shift, &s->chroma_y_shift);
2400
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 35 if (ret)
2401 ✗ return ret;
2402
2403 35 s->y_superblock_width = (s->width + 31) / 32;
2404 35 s->y_superblock_height = (s->height + 31) / 32;
2405 35 s->y_superblock_count = s->y_superblock_width * s->y_superblock_height;
2406
2407 /* work out the dimensions for the C planes */
2408 35 c_width = s->width >> s->chroma_x_shift;
2409 35 c_height = s->height >> s->chroma_y_shift;
2410 35 s->c_superblock_width = (c_width + 31) / 32;
2411 35 s->c_superblock_height = (c_height + 31) / 32;
2412 35 s->c_superblock_count = s->c_superblock_width * s->c_superblock_height;
2413
2414 35 s->superblock_count = s->y_superblock_count + (s->c_superblock_count * 2);
2415 35 s->u_superblock_start = s->y_superblock_count;
2416 35 s->v_superblock_start = s->u_superblock_start + s->c_superblock_count;
2417
2418 35 s->macroblock_width = (s->width + 15) / 16;
2419 35 s->macroblock_height = (s->height + 15) / 16;
2420 35 s->macroblock_count = s->macroblock_width * s->macroblock_height;
2421 35 s->c_macroblock_width = (c_width + 15) / 16;
2422 35 s->c_macroblock_height = (c_height + 15) / 16;
2423 35 s->c_macroblock_count = s->c_macroblock_width * s->c_macroblock_height;
2424 35 s->yuv_macroblock_count = s->macroblock_count + 2 * s->c_macroblock_count;
2425
2426 35 s->fragment_width[0] = s->width / FRAGMENT_PIXELS;
2427 35 s->fragment_height[0] = s->height / FRAGMENT_PIXELS;
2428 35 s->fragment_width[1] = s->fragment_width[0] >> s->chroma_x_shift;
2429 35 s->fragment_height[1] = s->fragment_height[0] >> s->chroma_y_shift;
2430
2431 /* fragment count covers all 8x8 blocks for all 3 planes */
2432 35 y_fragment_count = s->fragment_width[0] * s->fragment_height[0];
2433 35 c_fragment_count = s->fragment_width[1] * s->fragment_height[1];
2434 35 s->fragment_count = y_fragment_count + 2 * c_fragment_count;
2435 35 s->fragment_start[1] = y_fragment_count;
2436 35 s->fragment_start[2] = y_fragment_count + c_fragment_count;
2437
2438
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 35 if (!s->theora_tables) {
2439
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 325 for (int i = 0; i < 64; i++) {
2440
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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];
2441
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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];
2442
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 320 s->coded_ac_scale_factor[i] = s->version < 2 ? vp31_ac_scale_factor[i] : vp4_ac_scale_factor[i];
2443
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 320 s->base_matrix[0][i] = s->version < 2 ? vp31_intra_y_dequant[i] : vp4_generic_dequant[i];
2444
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 320 s->base_matrix[1][i] = s->version < 2 ? ff_mjpeg_std_chrominance_quant_tbl[i] : vp4_generic_dequant[i];
2445
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 320 s->base_matrix[2][i] = s->version < 2 ? vp31_inter_dequant[i] : vp4_generic_dequant[i];
2446
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 320 s->filter_limit_values[i] = s->version < 2 ? vp31_filter_limit_values[i] : vp4_filter_limit_values[i];
2447 }
2448
2449
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 15 for (int inter = 0; inter < 2; inter++) {
2450
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 40 for (int plane = 0; plane < 3; plane++) {
2451 30 s->qr_count[inter][plane] = 1;
2452 30 s->qr_size[inter][plane][0] = 63;
2453 30 s->qr_base[inter][plane][0] =
2454 30 s->qr_base[inter][plane][1] = 2 * inter + (!!plane) * !inter;
2455 }
2456 }
2457 }
2458
2459
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 35 if (ff_thread_sync_ref(avctx, offsetof(Vp3DecodeContext, coeff_vlc)) != FF_THREAD_IS_COPY) {
2460 35 CoeffVLCs *vlcs = av_refstruct_alloc_ext(sizeof(*s->coeff_vlc), 0,
2461 NULL, free_vlc_tables);
2462
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 35 if (!vlcs)
2463 ✗ return AVERROR(ENOMEM);
2464
2465 35 s->coeff_vlc = vlcs;
2466
2467
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 35 if (!s->theora_tables) {
2468 const uint8_t (*bias_tabs)[32][2];
2469
2470 /* init VLC tables */
2471
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 5 bias_tabs = CONFIG_VP4_DECODER && s->version >= 2 ? vp4_bias : vp3_bias;
2472
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 405 for (int i = 0; i < FF_ARRAY_ELEMS(vlcs->vlcs); i++) {
2473 400 ret = ff_vlc_init_from_lengths(&vlcs->vlcs[i], 11, 32,
2474 400 &bias_tabs[i][0][1], 2,
2475 400 &bias_tabs[i][0][0], 2, 1,
2476 0, 0, avctx);
2477
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 400 if (ret < 0)
2478 ✗ return ret;
2479 400 vlcs->vlc_tabs[i] = vlcs->vlcs[i].table;
2480 }
2481 } else {
2482
2/2
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 2430 for (int i = 0; i < FF_ARRAY_ELEMS(vlcs->vlcs); i++) {
2483 2400 const HuffTable *tab = &s->huffman_table[i];
2484
2485 2400 ret = ff_vlc_init_from_lengths(&vlcs->vlcs[i], 11, tab->nb_entries,
2486 2400 &tab->entries[0].len, sizeof(*tab->entries),
2487 2400 &tab->entries[0].sym, sizeof(*tab->entries), 1,
2488 0, 0, avctx);
2489
1/2
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 2400 if (ret < 0)
2490 ✗ return ret;
2491 2400 vlcs->vlc_tabs[i] = vlcs->vlcs[i].table;
2492 }
2493 }
2494 }
2495
2496 35 ff_thread_once(&init_static_once, init_tables_once);
2497
2498 35 return allocate_tables(avctx);
2499 }
2500
2501 #if HAVE_THREADS
2502 ✗ static void ref_frames(Vp3DecodeContext *dst, const Vp3DecodeContext *src)
2503 {
2504 ✗ ff_progress_frame_replace(&dst->current_frame, &src->current_frame);
2505 ✗ ff_progress_frame_replace(&dst->golden_frame, &src->golden_frame);
2506 ✗ }
2507
2508 ✗ static int vp3_update_thread_context(AVCodecContext *dst, const AVCodecContext *src)
2509 {
2510 ✗ Vp3DecodeContext *s = dst->priv_data;
2511 ✗ const Vp3DecodeContext *s1 = src->priv_data;
2512 ✗ int qps_changed = 0;
2513
2514 // copy previous frame data
2515 ✗ ref_frames(s, s1);
2516
2517 ✗ if (s != s1) {
2518 // copy qscale data if necessary
2519 ✗ for (int i = 0; i < 3; i++) {
2520 ✗ if (s->qps[i] != s1->qps[1]) {
2521 ✗ qps_changed = 1;
2522 ✗ memcpy(&s->qmat[i], &s1->qmat[i], sizeof(s->qmat[i]));
2523 }
2524 }
2525
2526 ✗ if (s->qps[0] != s1->qps[0])
2527 ✗ memcpy(&s->bounding_values_array, &s1->bounding_values_array,
2528 sizeof(s->bounding_values_array));
2529
2530 ✗ if (qps_changed) {
2531 ✗ memcpy(s->qps, s1->qps, sizeof(s->qps));
2532 ✗ s->nqps = s1->nqps;
2533 }
2534 }
2535 ✗ return 0;
2536 }
2537 #endif
2538
2539 164 static int vp3_decode_frame(AVCodecContext *avctx, AVFrame *frame,
2540 int *got_frame, AVPacket *avpkt)
2541 {
2542 164 const uint8_t *buf = avpkt->data;
2543 164 int buf_size = avpkt->size;
2544 164 Vp3DecodeContext *s = avctx->priv_data;
2545 GetBitContext gb;
2546 int ret;
2547
2548
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 164 if ((ret = init_get_bits8(&gb, buf, buf_size)) < 0)
2549 ✗ return ret;
2550
2551 #if CONFIG_THEORA_DECODER
2552
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 164 if (s->theora && get_bits1(&gb)) {
2553 ✗ int type = get_bits(&gb, 7);
2554 ✗ skip_bits_long(&gb, 6*8); /* "theora" */
2555
2556 ✗ if (s->avctx->active_thread_type&FF_THREAD_FRAME) {
2557 ✗ av_log(avctx, AV_LOG_ERROR, "midstream reconfiguration with multithreading is unsupported, try -threads 1\n");
2558 ✗ return AVERROR_PATCHWELCOME;
2559 }
2560 ✗ if (type == 0) {
2561 ✗ vp3_decode_end(avctx);
2562 ✗ ret = theora_decode_header(avctx, &gb);
2563
2564 ✗ if (ret >= 0)
2565 ✗ ret = vp3_decode_init(avctx);
2566 ✗ if (ret < 0) {
2567 ✗ vp3_decode_end(avctx);
2568 ✗ return ret;
2569 }
2570 ✗ return buf_size;
2571 ✗ } else if (type == 2) {
2572 ✗ vp3_decode_end(avctx);
2573 ✗ ret = theora_decode_tables(avctx, &gb);
2574 ✗ if (ret >= 0)
2575 ✗ ret = vp3_decode_init(avctx);
2576 ✗ if (ret < 0) {
2577 ✗ vp3_decode_end(avctx);
2578 ✗ return ret;
2579 }
2580 ✗ return buf_size;
2581 }
2582
2583 ✗ av_log(avctx, AV_LOG_ERROR,
2584 "Header packet passed to frame decoder, skipping\n");
2585 ✗ return -1;
2586 }
2587 #endif
2588
2589 164 s->keyframe = !get_bits1(&gb);
2590
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 164 if (!s->all_fragments) {
2591 ✗ av_log(avctx, AV_LOG_ERROR, "Data packet without prior valid headers\n");
2592 ✗ return -1;
2593 }
2594
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 164 if (!s->theora)
2595 138 skip_bits(&gb, 1);
2596
2597 int last_qps[3];
2598
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 656 for (int i = 0; i < 3; i++)
2599 492 last_qps[i] = s->qps[i];
2600
2601 164 s->nqps = 0;
2602 do {
2603 164 s->qps[s->nqps++] = get_bits(&gb, 6);
2604
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 164 } while (s->theora >= 0x030200 && s->nqps < 3 && get_bits1(&gb));
2605
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 492 for (int i = s->nqps; i < 3; i++)
2606 328 s->qps[i] = -1;
2607
2608
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 164 if (s->avctx->debug & FF_DEBUG_PICT_INFO)
2609 ✗ av_log(s->avctx, AV_LOG_INFO, " VP3 %sframe #%"PRId64": Q index = %d\n",
2610 ✗ s->keyframe ? "key" : "", avctx->frame_num + 1, s->qps[0]);
2611
2612
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 302 s->skip_loop_filter = !s->filter_limit_values[s->qps[0]] ||
2613 138 avctx->skip_loop_filter >= (s->keyframe ? AVDISCARD_ALL
2614
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✓ Branch 1 taken 135 times.
 138 : AVDISCARD_NONKEY);
2615
2616
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 164 if (s->qps[0] != last_qps[0])
2617 62 init_loop_filter(s);
2618
2619
2/2
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 328 for (int i = 0; i < s->nqps; i++)
2620 // reinit all dequantizers if the first one changed, because
2621 // the DC of the first quantizer must be used for all matrices
2622
3/4
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 164 if (s->qps[i] != last_qps[i] || s->qps[0] != last_qps[0])
2623 62 init_dequantizer(s, i);
2624
2625
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 164 if (avctx->skip_frame >= AVDISCARD_NONKEY && !s->keyframe)
2626 ✗ return buf_size;
2627
2628 164 ret = ff_progress_frame_get_buffer(avctx, &s->last_frame,
2629 AV_GET_BUFFER_FLAG_REF);
2630
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 164 if (ret < 0) {
2631 // Don't goto error here, as one can't report progress on or
2632 // unref a non-existent frame.
2633 ✗ return ret;
2634 }
2635 164 FFSWAP(ProgressFrame, s->last_frame, s->current_frame);
2636 328 s->current_frame.f->pict_type = s->keyframe ? AV_PICTURE_TYPE_I
2637
2/2
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 164 : AV_PICTURE_TYPE_P;
2638
2/2
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 164 if (s->keyframe)
2639 6 s->current_frame.f->flags |= AV_FRAME_FLAG_KEY;
2640 else
2641 158 s->current_frame.f->flags &= ~AV_FRAME_FLAG_KEY;
2642
2643
2/2
✓ Branch 0 taken 5 times.
✓ Branch 1 taken 159 times.
 164 if (!s->edge_emu_buffer) {
2644 5 s->edge_emu_buffer = av_malloc(9 * FFABS(s->current_frame.f->linesize[0]));
2645
1/2
✗ Branch 0 not taken.
✓ Branch 1 taken 5 times.
 5 if (!s->edge_emu_buffer) {
2646 ✗ ret = AVERROR(ENOMEM);
2647 ✗ goto error;
2648 }
2649 }
2650
2651
2/2
✓ Branch 0 taken 6 times.
✓ Branch 1 taken 158 times.
 164 if (s->keyframe) {
2652
2/2
✓ Branch 0 taken 3 times.
✓ Branch 1 taken 3 times.
 6 if (!s->theora) {
2653 3 skip_bits(&gb, 4); /* width code */
2654 3 skip_bits(&gb, 4); /* height code */
2655
1/2
✓ Branch 0 taken 3 times.
✗ Branch 1 not taken.
 3 if (s->version) {
2656 3 int version = get_bits(&gb, 5);
2657 #if !CONFIG_VP4_DECODER
2658 if (version >= 2) {
2659 av_log(avctx, AV_LOG_ERROR, "This build does not support decoding VP4.\n");
2660 ret = AVERROR_DECODER_NOT_FOUND;
2661 goto error;
2662 }
2663 #endif
2664 3 s->version = version;
2665
2/2
✓ Branch 0 taken 2 times.
✓ Branch 1 taken 1 times.
 3 if (avctx->frame_num == 0)
2666 2 av_log(s->avctx, AV_LOG_DEBUG,
2667 "VP version: %d\n", s->version);
2668 }
2669 }
2670
1/4
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 6 if (s->version || s->theora) {
2671
1/2
✗ Branch 1 not taken.
✓ Branch 2 taken 6 times.
 6 if (get_bits1(&gb))
2672 ✗ av_log(s->avctx, AV_LOG_ERROR,
2673 "Warning, unsupported keyframe coding type?!\n");
2674 6 skip_bits(&gb, 2); /* reserved? */
2675
2676 #if CONFIG_VP4_DECODER
2677
2/2
✓ Branch 0 taken 2 times.
✓ Branch 1 taken 4 times.
 6 if (s->version >= 2) {
2678 int mb_height, mb_width;
2679 int mb_width_mul, mb_width_div, mb_height_mul, mb_height_div;
2680
2681 2 mb_height = get_bits(&gb, 8);
2682 2 mb_width = get_bits(&gb, 8);
2683
1/2
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✗ Branch 1 not taken.
 2 if (mb_height != s->macroblock_height ||
2684
1/2
✗ Branch 0 not taken.
✓ Branch 1 taken 2 times.
 2 mb_width != s->macroblock_width)
2685 ✗ avpriv_request_sample(s->avctx, "macroblock dimension mismatch");
2686
2687 2 mb_width_mul = get_bits(&gb, 5);
2688 2 mb_width_div = get_bits(&gb, 3);
2689 2 mb_height_mul = get_bits(&gb, 5);
2690 2 mb_height_div = get_bits(&gb, 3);
2691
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)
2692 ✗ avpriv_request_sample(s->avctx, "unexpected macroblock dimension multiplier/divider");
2693
2694
1/2
✗ Branch 1 not taken.
✓ Branch 2 taken 2 times.
 2 if (get_bits(&gb, 2))
2695 ✗ avpriv_request_sample(s->avctx, "unknown bits");
2696 }
2697 #endif
2698 }
2699 6 ff_progress_frame_replace(&s->golden_frame, &s->current_frame);
2700 } else {
2701
1/2
✗ Branch 0 not taken.
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 158 if (!s->golden_frame.f) {
2702 ✗ av_log(s->avctx, AV_LOG_WARNING,
2703 "vp3: first frame not a keyframe\n");
2704
2705 ✗ if ((ret = ff_progress_frame_get_buffer(avctx, &s->golden_frame,
2706 AV_GET_BUFFER_FLAG_REF)) < 0)
2707 ✗ goto error;
2708 ✗ s->golden_frame.f->pict_type = AV_PICTURE_TYPE_I;
2709 ✗ ff_progress_frame_replace(&s->last_frame, &s->golden_frame);
2710 ✗ ff_progress_frame_report(&s->golden_frame, INT_MAX);
2711 }
2712 }
2713 164 ff_thread_finish_setup(avctx);
2714
2715 164 memset(s->all_fragments, 0, s->fragment_count * sizeof(Vp3Fragment));
2716
2717
2/2
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✓ Branch 1 taken 24 times.
 164 if (s->version < 2) {
2718
1/2
✗ Branch 1 not taken.
✓ Branch 2 taken 140 times.
 140 if ((ret = unpack_superblocks(s, &gb)) < 0) {
2719 ✗ av_log(s->avctx, AV_LOG_ERROR, "error in unpack_superblocks\n");
2720 ✗ goto error;
2721 }
2722 #if CONFIG_VP4_DECODER
2723 } else {
2724
1/2
✗ Branch 1 not taken.
✓ Branch 2 taken 24 times.
 24 if ((ret = vp4_unpack_macroblocks(s, &gb)) < 0) {
2725 ✗ av_log(s->avctx, AV_LOG_ERROR, "error in vp4_unpack_macroblocks\n");
2726 ✗ goto error;
2727 }
2728 #endif
2729 }
2730
1/2
✗ Branch 1 not taken.
✓ Branch 2 taken 164 times.
 164 if ((ret = unpack_modes(s, &gb)) < 0) {
2731 ✗ av_log(s->avctx, AV_LOG_ERROR, "error in unpack_modes\n");
2732 ✗ goto error;
2733 }
2734
1/2
✗ Branch 1 not taken.
✓ Branch 2 taken 164 times.
 164 if (ret = unpack_vectors(s, &gb)) {
2735 ✗ av_log(s->avctx, AV_LOG_ERROR, "error in unpack_vectors\n");
2736 ✗ goto error;
2737 }
2738
1/2
✗ Branch 1 not taken.
✓ Branch 2 taken 164 times.
 164 if ((ret = unpack_block_qpis(s, &gb)) < 0) {
2739 ✗ av_log(s->avctx, AV_LOG_ERROR, "error in unpack_block_qpis\n");
2740 ✗ goto error;
2741 }
2742
2743
2/2
✓ Branch 0 taken 140 times.
✓ Branch 1 taken 24 times.
 164 if (s->version < 2) {
2744
1/2
✗ Branch 1 not taken.
✓ Branch 2 taken 140 times.
 140 if ((ret = unpack_dct_coeffs(s, &gb)) < 0) {
2745 ✗ av_log(s->avctx, AV_LOG_ERROR, "error in unpack_dct_coeffs\n");
2746 ✗ goto error;
2747 }
2748 #if CONFIG_VP4_DECODER
2749 } else {
2750
1/2
✗ Branch 1 not taken.
✓ Branch 2 taken 24 times.
 24 if ((ret = vp4_unpack_dct_coeffs(s, &gb)) < 0) {
2751 ✗ av_log(s->avctx, AV_LOG_ERROR, "error in vp4_unpack_dct_coeffs\n");
2752 ✗ goto error;
2753 }
2754 #endif
2755 }
2756
2757
2/2
✓ Branch 0 taken 492 times.
✓ Branch 1 taken 164 times.
 656 for (int i = 0; i < 3; i++) {
2758
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);
2759
1/2
✗ Branch 0 not taken.
✓ Branch 1 taken 492 times.
 492 if (s->flipped_image)
2760 ✗ s->data_offset[i] = 0;
2761 else
2762 492 s->data_offset[i] = (height - 1) * s->current_frame.f->linesize[i];
2763 }
2764
2765 164 s->last_slice_end = 0;
2766
2/2
✓ Branch 0 taken 1068 times.
✓ Branch 1 taken 164 times.
 1232 for (int i = 0; i < s->c_superblock_height; i++)
2767 1068 render_slice(s, i);
2768
2769 // filter the last row
2770
2/2
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✓ Branch 1 taken 24 times.
 164 if (s->version < 2)
2771
2/2
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✓ Branch 1 taken 140 times.
 560 for (int i = 0; i < 3; i++) {
2772
3/4
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✓ Branch 2 taken 280 times.
✗ Branch 3 not taken.
 420 int row = (s->height >> (3 + (i && s->chroma_y_shift))) - 1;
2773 420 apply_loop_filter(s, i, row, row + 1);
2774 }
2775 164 vp3_draw_horiz_band(s, s->height);
2776
2777 164 ff_progress_frame_unref(&s->last_frame);
2778
2779 /* output frame, offset as needed */
2780
1/2
✗ Branch 1 not taken.
✓ Branch 2 taken 164 times.
 164 if ((ret = av_frame_ref(frame, s->current_frame.f)) < 0)
2781 ✗ return ret;
2782
2783 164 frame->crop_left = s->offset_x;
2784 164 frame->crop_right = avctx->coded_width - avctx->width - s->offset_x;
2785 164 frame->crop_top = s->offset_y;
2786 164 frame->crop_bottom = avctx->coded_height - avctx->height - s->offset_y;
2787
2788 164 *got_frame = 1;
2789
2790 164 return buf_size;
2791
2792 ✗ error:
2793 ✗ ff_progress_frame_report(&s->current_frame, INT_MAX);
2794 ✗ ff_progress_frame_unref(&s->last_frame);
2795
2796 ✗ return ret;
2797 }
2798
2799 151200 static int read_huffman_tree(HuffTable *huff, GetBitContext *gb, int length,
2800 AVCodecContext *avctx)
2801 {
2802
2/2
✓ Branch 1 taken 76800 times.
✓ Branch 2 taken 74400 times.
 151200 if (get_bits1(gb)) {
2803 int token;
2804
1/2
✗ Branch 0 not taken.
✓ Branch 1 taken 76800 times.
 76800 if (huff->nb_entries >= 32) { /* overflow */
2805 ✗ av_log(avctx, AV_LOG_ERROR, "huffman tree overflow\n");
2806 ✗ return -1;
2807 }
2808 76800 token = get_bits(gb, 5);
2809 ff_dlog(avctx, "code length %d, curr entry %d, token %d\n",
2810 length, huff->nb_entries, token);
2811 76800 huff->entries[huff->nb_entries++] = (HuffEntry){ length, token };
2812 } else {
2813 /* The following bound follows from the fact that nb_entries <= 32. */
2814
1/2
✗ Branch 0 not taken.
✓ Branch 1 taken 74400 times.
 74400 if (length >= 31) { /* overflow */
2815 ✗ av_log(avctx, AV_LOG_ERROR, "huffman tree overflow\n");
2816 ✗ return -1;
2817 }
2818 74400 length++;
2819
1/2
✗ Branch 1 not taken.
✓ Branch 2 taken 74400 times.
 74400 if (read_huffman_tree(huff, gb, length, avctx))
2820 ✗ return -1;
2821
1/2
✗ Branch 1 not taken.
✓ Branch 2 taken 74400 times.
 74400 if (read_huffman_tree(huff, gb, length, avctx))
2822 ✗ return -1;
2823 }
2824 151200 return 0;
2825 }
2826
2827 #if CONFIG_THEORA_DECODER
2828 static const enum AVPixelFormat theora_pix_fmts[4] = {
2829 AV_PIX_FMT_YUV420P, AV_PIX_FMT_NONE, AV_PIX_FMT_YUV422P, AV_PIX_FMT_YUV444P
2830 };
2831
2832 30 static int theora_decode_header(AVCodecContext *avctx, GetBitContext *gb)
2833 {
2834 30 Vp3DecodeContext *s = avctx->priv_data;
2835 int visible_width, visible_height, colorspace;
2836 30 uint8_t offset_x = 0, offset_y = 0;
2837 int ret;
2838 AVRational fps, aspect;
2839
2840
1/2
✗ Branch 1 not taken.
✓ Branch 2 taken 30 times.
 30 if (get_bits_left(gb) < 206)
2841 ✗ return AVERROR_INVALIDDATA;
2842
2843 30 s->theora_header = 0;
2844 30 s->theora = get_bits(gb, 24);
2845 30 av_log(avctx, AV_LOG_DEBUG, "Theora bitstream version %X\n", s->theora);
2846
1/2
✗ Branch 0 not taken.
✓ Branch 1 taken 30 times.
 30 if (!s->theora) {
2847 ✗ s->theora = 1;
2848 ✗ avpriv_request_sample(s->avctx, "theora 0");
2849 }
2850
2851 /* 3.2.0 aka alpha3 has the same frame orientation as original vp3
2852 * but previous versions have the image flipped relative to vp3 */
2853
1/2
✗ Branch 0 not taken.
✓ Branch 1 taken 30 times.
 30 if (s->theora < 0x030200) {
2854 ✗ s->flipped_image = 1;
2855 ✗ av_log(avctx, AV_LOG_DEBUG,
2856 "Old (<alpha3) Theora bitstream, flipped image\n");
2857 }
2858
2859 30 visible_width =
2860 30 s->width = get_bits(gb, 16) << 4;
2861 30 visible_height =
2862 30 s->height = get_bits(gb, 16) << 4;
2863
2864
1/2
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✗ Branch 1 not taken.
 30 if (s->theora >= 0x030200) {
2865 30 visible_width = get_bits(gb, 24);
2866 30 visible_height = get_bits(gb, 24);
2867
2868 30 offset_x = get_bits(gb, 8); /* offset x */
2869 30 offset_y = get_bits(gb, 8); /* offset y, from bottom */
2870 }
2871
2872 /* sanity check */
2873
1/2
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✗ Branch 2 not taken.
 30 if (av_image_check_size(visible_width, visible_height, 0, avctx) < 0 ||
2874
1/2
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✗ Branch 1 not taken.
 30 visible_width + offset_x > s->width ||
2875
1/2
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✗ Branch 1 not taken.
 30 visible_height + offset_y > s->height ||
2876
1/2
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✗ Branch 1 not taken.
 30 visible_width + 512 < s->width ||
2877
2/4
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✓ Branch 3 taken 30 times.
 30 visible_height + 512 < s->height ||
2878 visible_width < 18
2879 ) {
2880 ✗ av_log(avctx, AV_LOG_ERROR,
2881 "Invalid frame dimensions - w:%d h:%d x:%d y:%d (%dx%d).\n",
2882 visible_width, visible_height, offset_x, offset_y,
2883 s->width, s->height);
2884 ✗ return AVERROR_INVALIDDATA;
2885 }
2886
2887 30 fps.num = get_bits_long(gb, 32);
2888 30 fps.den = get_bits_long(gb, 32);
2889
2/4
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 30 if (fps.num && fps.den) {
2890
2/4
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✗ Branch 2 not taken.
✓ Branch 3 taken 30 times.
 30 if (fps.num < 0 || fps.den < 0) {
2891 ✗ av_log(avctx, AV_LOG_ERROR, "Invalid framerate\n");
2892 ✗ return AVERROR_INVALIDDATA;
2893 }
2894 30 av_reduce(&avctx->framerate.den, &avctx->framerate.num,
2895 30 fps.den, fps.num, 1 << 30);
2896 }
2897
2898 30 aspect.num = get_bits(gb, 24);
2899 30 aspect.den = get_bits(gb, 24);
2900
3/4
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✗ Branch 3 not taken.
 30 if (aspect.num && aspect.den) {
2901 6 av_reduce(&avctx->sample_aspect_ratio.num,
2902 &avctx->sample_aspect_ratio.den,
2903 6 aspect.num, aspect.den, 1 << 30);
2904 6 ff_set_sar(avctx, avctx->sample_aspect_ratio);
2905 }
2906
2907
1/2
✗ Branch 0 not taken.
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 30 if (s->theora < 0x030200)
2908 ✗ skip_bits(gb, 5); /* keyframe frequency force */
2909 30 colorspace = get_bits(gb, 8);
2910 30 skip_bits(gb, 24); /* bitrate */
2911
2912 30 skip_bits(gb, 6); /* quality hint */
2913
2914
1/2
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✗ Branch 1 not taken.
 30 if (s->theora >= 0x030200) {
2915 30 skip_bits(gb, 5); /* keyframe frequency force */
2916 30 avctx->pix_fmt = theora_pix_fmts[get_bits(gb, 2)];
2917
1/2
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 30 if (avctx->pix_fmt == AV_PIX_FMT_NONE) {
2918 ✗ av_log(avctx, AV_LOG_ERROR, "Invalid pixel format\n");
2919 ✗ return AVERROR_INVALIDDATA;
2920 }
2921 30 skip_bits(gb, 3); /* reserved */
2922 } else
2923 ✗ avctx->pix_fmt = AV_PIX_FMT_YUV420P;
2924
2925
1/2
✗ Branch 0 not taken.
✓ Branch 1 taken 30 times.
 30 if (s->width < 18)
2926 ✗ return AVERROR_PATCHWELCOME;
2927 30 ret = ff_set_dimensions(avctx, s->width, s->height);
2928
1/2
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 30 if (ret < 0)
2929 ✗ return ret;
2930
1/2
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✗ Branch 1 not taken.
 30 if (!(avctx->flags2 & AV_CODEC_FLAG2_IGNORE_CROP)) {
2931 30 avctx->width = visible_width;
2932 30 avctx->height = visible_height;
2933 // translate offsets from theora axis ([0,0] lower left)
2934 // to normal axis ([0,0] upper left)
2935 30 s->offset_x = offset_x;
2936 30 s->offset_y = s->height - visible_height - offset_y;
2937 }
2938
2939
1/2
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 30 if (colorspace == 1)
2940 ✗ avctx->color_primaries = AVCOL_PRI_BT470M;
2941
1/2
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 30 else if (colorspace == 2)
2942 ✗ avctx->color_primaries = AVCOL_PRI_BT470BG;
2943
2944
2/4
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✓ Branch 3 taken 30 times.
 30 if (colorspace == 1 || colorspace == 2) {
2945 ✗ avctx->colorspace = AVCOL_SPC_BT470BG;
2946 ✗ avctx->color_trc = AVCOL_TRC_BT709;
2947 }
2948
2949 30 s->theora_header = 1;
2950 30 return 0;
2951 }
2952
2953 30 static int theora_decode_tables(AVCodecContext *avctx, GetBitContext *gb)
2954 {
2955 30 Vp3DecodeContext *s = avctx->priv_data;
2956 int n, matrices, ret;
2957
2958
1/2
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 30 if (!s->theora_header)
2959 ✗ return AVERROR_INVALIDDATA;
2960
2961
1/2
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✗ Branch 1 not taken.
 30 if (s->theora >= 0x030200) {
2962 30 n = get_bits(gb, 3);
2963 /* loop filter limit values table */
2964
1/2
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✗ Branch 1 not taken.
 30 if (n)
2965
2/2
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✓ Branch 1 taken 30 times.
 1950 for (int i = 0; i < 64; i++)
2966 1920 s->filter_limit_values[i] = get_bits(gb, n);
2967 }
2968
2969
1/2
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✗ Branch 1 not taken.
 30 if (s->theora >= 0x030200)
2970 30 n = get_bits(gb, 4) + 1;
2971 else
2972 ✗ n = 16;
2973 /* quality threshold table */
2974
2/2
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✓ Branch 1 taken 30 times.
 1950 for (int i = 0; i < 64; i++)
2975 1920 s->coded_ac_scale_factor[i] = get_bits(gb, n);
2976
2977
1/2
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✗ Branch 1 not taken.
 30 if (s->theora >= 0x030200)
2978 30 n = get_bits(gb, 4) + 1;
2979 else
2980 ✗ n = 16;
2981 /* dc scale factor table */
2982
2/2
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✓ Branch 1 taken 30 times.
 1950 for (int i = 0; i < 64; i++)
2983 1920 s->coded_dc_scale_factor[0][i] =
2984 1920 s->coded_dc_scale_factor[1][i] = get_bits(gb, n);
2985
2986
1/2
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✗ Branch 1 not taken.
 30 if (s->theora >= 0x030200)
2987 30 matrices = get_bits(gb, 9) + 1;
2988 else
2989 ✗ matrices = 3;
2990
2991
1/2
✗ Branch 0 not taken.
✓ Branch 1 taken 30 times.
 30 if (matrices > 384) {
2992 ✗ av_log(avctx, AV_LOG_ERROR, "invalid number of base matrixes\n");
2993 ✗ return -1;
2994 }
2995
2996
2/2
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✓ Branch 1 taken 30 times.
 417 for (int j = 0; j < matrices; j++)
2997
2/2
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✓ Branch 1 taken 387 times.
 25155 for (int i = 0; i < 64; i++)
2998 24768 s->base_matrix[j][i] = get_bits(gb, 8);
2999
3000
2/2
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✓ Branch 1 taken 30 times.
 90 for (int inter = 0; inter <= 1; inter++) {
3001
2/2
✓ Branch 0 taken 180 times.
✓ Branch 1 taken 60 times.
 240 for (int plane = 0; plane <= 2; plane++) {
3002 180 int newqr = 1;
3003
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)
3004 150 newqr = get_bits1(gb);
3005
2/2
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✓ Branch 1 taken 66 times.
 180 if (!newqr) {
3006 int qtj, plj;
3007
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)) {
3008 72 qtj = 0;
3009 72 plj = plane;
3010 } else {
3011 42 qtj = (3 * inter + plane - 1) / 3;
3012 42 plj = (plane + 2) % 3;
3013 }
3014 114 s->qr_count[inter][plane] = s->qr_count[qtj][plj];
3015 114 memcpy(s->qr_size[inter][plane], s->qr_size[qtj][plj],
3016 sizeof(s->qr_size[0][0]));
3017 114 memcpy(s->qr_base[inter][plane], s->qr_base[qtj][plj],
3018 sizeof(s->qr_base[0][0]));
3019 } else {
3020 66 int qri = 0;
3021 66 int qi = 0;
3022
3023 360 for (;;) {
3024 426 int i = get_bits(gb, av_log2(matrices - 1) + 1);
3025
1/2
✗ Branch 0 not taken.
✓ Branch 1 taken 426 times.
 426 if (i >= matrices) {
3026 ✗ av_log(avctx, AV_LOG_ERROR,
3027 "invalid base matrix index\n");
3028 ✗ return -1;
3029 }
3030 426 s->qr_base[inter][plane][qri] = i;
3031
2/2
✓ Branch 0 taken 66 times.
✓ Branch 1 taken 360 times.
 426 if (qi >= 63)
3032 66 break;
3033 360 i = get_bits(gb, av_log2(63 - qi) + 1) + 1;
3034 360 s->qr_size[inter][plane][qri++] = i;
3035 360 qi += i;
3036 }
3037
3038
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 66 if (qi > 63) {
3039 ✗ av_log(avctx, AV_LOG_ERROR, "invalid qi %d > 63\n", qi);
3040 ✗ return -1;
3041 }
3042 66 s->qr_count[inter][plane] = qri;
3043 }
3044 }
3045 }
3046
3047 /* Huffman tables */
3048
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 2430 for (int i = 0; i < FF_ARRAY_ELEMS(s->huffman_table); i++) {
3049 2400 s->huffman_table[i].nb_entries = 0;
3050
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 2400 if ((ret = read_huffman_tree(&s->huffman_table[i], gb, 0, avctx)) < 0)
3051 ✗ return ret;
3052 }
3053
3054 30 s->theora_tables = 1;
3055
3056 30 return 0;
3057 }
3058
3059 30 static av_cold int theora_decode_init(AVCodecContext *avctx)
3060 {
3061 30 Vp3DecodeContext *s = avctx->priv_data;
3062 GetBitContext gb;
3063 int ptype;
3064 const uint8_t *header_start[3];
3065 int header_len[3];
3066 int ret;
3067
3068 30 avctx->pix_fmt = AV_PIX_FMT_YUV420P;
3069
3070 30 s->theora = 1;
3071
3072
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 30 if (!avctx->extradata_size) {
3073 ✗ av_log(avctx, AV_LOG_ERROR, "Missing extradata!\n");
3074 ✗ return -1;
3075 }
3076
3077
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 30 if (avpriv_split_xiph_headers(avctx->extradata, avctx->extradata_size,
3078 42, header_start, header_len) < 0) {
3079 ✗ av_log(avctx, AV_LOG_ERROR, "Corrupt extradata\n");
3080 ✗ return -1;
3081 }
3082
3083
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 120 for (int i = 0; i < 3; i++) {
3084
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 90 if (header_len[i] <= 0)
3085 ✗ continue;
3086 90 ret = init_get_bits8(&gb, header_start[i], header_len[i]);
3087
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 90 if (ret < 0)
3088 ✗ return ret;
3089
3090 90 ptype = get_bits(&gb, 8);
3091
3092
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 90 if (!(ptype & 0x80)) {
3093 ✗ av_log(avctx, AV_LOG_ERROR, "Invalid extradata!\n");
3094 // return -1;
3095 }
3096
3097 // FIXME: Check for this as well.
3098 90 skip_bits_long(&gb, 6 * 8); /* "theora" */
3099
3100
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 90 switch (ptype) {
3101 30 case 0x80:
3102
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 30 if (theora_decode_header(avctx, &gb) < 0)
3103 ✗ return -1;
3104 30 break;
3105 30 case 0x81:
3106 // FIXME: is this needed? it breaks sometimes
3107 // theora_decode_comments(avctx, gb);
3108 30 break;
3109 30 case 0x82:
3110
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 30 if (theora_decode_tables(avctx, &gb))
3111 ✗ return -1;
3112 30 break;
3113 ✗ default:
3114 ✗ av_log(avctx, AV_LOG_ERROR,
3115 "Unknown Theora config packet: %d\n", ptype & ~0x80);
3116 ✗ break;
3117 }
3118
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 90 if (ptype != 0x81 && get_bits_left(&gb) >= 8U)
3119 ✗ av_log(avctx, AV_LOG_WARNING,
3120 "%d bits left in packet %X\n",
3121 get_bits_left(&gb), ptype);
3122
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 90 if (s->theora < 0x030200)
3123 ✗ break;
3124 }
3125
3126 30 return vp3_decode_init(avctx);
3127 }
3128
3129 const FFCodec ff_theora_decoder = {
3130 .p.name = "theora",
3131 CODEC_LONG_NAME("Theora"),
3132 .p.type = AVMEDIA_TYPE_VIDEO,
3133 .p.id = AV_CODEC_ID_THEORA,
3134 .priv_data_size = sizeof(Vp3DecodeContext),
3135 .init = theora_decode_init,
3136 .close = vp3_decode_end,
3137 FF_CODEC_DECODE_CB(vp3_decode_frame),
3138 .p.capabilities = AV_CODEC_CAP_DR1 | AV_CODEC_CAP_DRAW_HORIZ_BAND |
3139 AV_CODEC_CAP_FRAME_THREADS,
3140 .flush = vp3_decode_flush,
3141 UPDATE_THREAD_CONTEXT(vp3_update_thread_context),
3142 .caps_internal = FF_CODEC_CAP_INIT_CLEANUP |
3143 FF_CODEC_CAP_EXPORTS_CROPPING |
3144 FF_CODEC_CAP_USES_PROGRESSFRAMES,
3145 };
3146 #endif
3147
3148 const FFCodec ff_vp3_decoder = {
3149 .p.name = "vp3",
3150 CODEC_LONG_NAME("On2 VP3"),
3151 .p.type = AVMEDIA_TYPE_VIDEO,
3152 .p.id = AV_CODEC_ID_VP3,
3153 .priv_data_size = sizeof(Vp3DecodeContext),
3154 .init = vp3_decode_init,
3155 .close = vp3_decode_end,
3156 FF_CODEC_DECODE_CB(vp3_decode_frame),
3157 .p.capabilities = AV_CODEC_CAP_DR1 | AV_CODEC_CAP_DRAW_HORIZ_BAND |
3158 AV_CODEC_CAP_FRAME_THREADS,
3159 .flush = vp3_decode_flush,
3160 UPDATE_THREAD_CONTEXT(vp3_update_thread_context),
3161 .caps_internal = FF_CODEC_CAP_INIT_CLEANUP |
3162 FF_CODEC_CAP_USES_PROGRESSFRAMES,
3163 };
3164
3165 #if CONFIG_VP4_DECODER
3166 const FFCodec ff_vp4_decoder = {
3167 .p.name = "vp4",
3168 CODEC_LONG_NAME("On2 VP4"),
3169 .p.type = AVMEDIA_TYPE_VIDEO,
3170 .p.id = AV_CODEC_ID_VP4,
3171 .priv_data_size = sizeof(Vp3DecodeContext),
3172 .init = vp3_decode_init,
3173 .close = vp3_decode_end,
3174 FF_CODEC_DECODE_CB(vp3_decode_frame),
3175 .p.capabilities = AV_CODEC_CAP_DR1 | AV_CODEC_CAP_DRAW_HORIZ_BAND |
3176 AV_CODEC_CAP_FRAME_THREADS,
3177 .flush = vp3_decode_flush,
3178 UPDATE_THREAD_CONTEXT(vp3_update_thread_context),
3179 .caps_internal = FF_CODEC_CAP_INIT_CLEANUP |
3180 FF_CODEC_CAP_USES_PROGRESSFRAMES,
3181 };
3182 #endif
3183