FFmpeg coverage

Directory: ../../../ffmpeg/
File: src/libavcodec/indeo3.c
Date: 2021-09-22 05:58:22
Exec Total Coverage
Lines: 382 484 78.9%
Branches: 243 375 64.8%
Line Branch Exec Source
1 /*
2 * Indeo Video v3 compatible decoder
3 * Copyright (c) 2009 - 2011 Maxim Poliakovski
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 * This is a decoder for Intel Indeo Video v3.
25 * It is based on vector quantization, run-length coding and motion compensation.
26 * Known container formats: .avi and .mov
27 * Known FOURCCs: 'IV31', 'IV32'
28 *
29 * @see http://wiki.multimedia.cx/index.php?title=Indeo_3
30 */
31
32 #include "libavutil/imgutils.h"
33 #include "libavutil/intreadwrite.h"
34 #include "libavutil/thread.h"
35 #include "avcodec.h"
36 #include "copy_block.h"
37 #include "bytestream.h"
38 #include "get_bits.h"
39 #include "hpeldsp.h"
40 #include "internal.h"
41
42 #include "indeo3data.h"
43
44 /* RLE opcodes. */
45 enum {
46 RLE_ESC_F9 = 249, ///< same as RLE_ESC_FA + do the same with next block
47 RLE_ESC_FA = 250, ///< INTRA: skip block, INTER: copy data from reference
48 RLE_ESC_FB = 251, ///< apply null delta to N blocks / skip N blocks
49 RLE_ESC_FC = 252, ///< same as RLE_ESC_FD + do the same with next block
50 RLE_ESC_FD = 253, ///< apply null delta to all remaining lines of this block
51 RLE_ESC_FE = 254, ///< apply null delta to all lines up to the 3rd line
52 RLE_ESC_FF = 255 ///< apply null delta to all lines up to the 2nd line
53 };
54
55
56 /* Some constants for parsing frame bitstream flags. */
57 #define BS_8BIT_PEL (1 << 1) ///< 8-bit pixel bitdepth indicator
58 #define BS_KEYFRAME (1 << 2) ///< intra frame indicator
59 #define BS_MV_Y_HALF (1 << 4) ///< vertical mv halfpel resolution indicator
60 #define BS_MV_X_HALF (1 << 5) ///< horizontal mv halfpel resolution indicator
61 #define BS_NONREF (1 << 8) ///< nonref (discardable) frame indicator
62 #define BS_BUFFER 9 ///< indicates which of two frame buffers should be used
63
64
65 typedef struct Plane {
66 uint8_t *buffers[2];
67 uint8_t *pixels[2]; ///< pointer to the actual pixel data of the buffers above
68 uint32_t width;
69 uint32_t height;
70 ptrdiff_t pitch;
71 } Plane;
72
73 #define CELL_STACK_MAX 20
74
75 typedef struct Cell {
76 int16_t xpos; ///< cell coordinates in 4x4 blocks
77 int16_t ypos;
78 int16_t width; ///< cell width in 4x4 blocks
79 int16_t height; ///< cell height in 4x4 blocks
80 uint8_t tree; ///< tree id: 0- MC tree, 1 - VQ tree
81 const int8_t *mv_ptr; ///< ptr to the motion vector if any
82 } Cell;
83
84 typedef struct Indeo3DecodeContext {
85 AVCodecContext *avctx;
86 HpelDSPContext hdsp;
87
88 GetBitContext gb;
89 int need_resync;
90 int skip_bits;
91 const uint8_t *next_cell_data;
92 const uint8_t *last_byte;
93 const int8_t *mc_vectors;
94 unsigned num_vectors; ///< number of motion vectors in mc_vectors
95
96 int16_t width, height;
97 uint32_t frame_num; ///< current frame number (zero-based)
98 int data_size; ///< size of the frame data in bytes
99 uint16_t frame_flags; ///< frame properties
100 uint8_t cb_offset; ///< needed for selecting VQ tables
101 uint8_t buf_sel; ///< active frame buffer: 0 - primary, 1 -secondary
102 const uint8_t *y_data_ptr;
103 const uint8_t *v_data_ptr;
104 const uint8_t *u_data_ptr;
105 int32_t y_data_size;
106 int32_t v_data_size;
107 int32_t u_data_size;
108 const uint8_t *alt_quant; ///< secondary VQ table set for the modes 1 and 4
109 Plane planes[3];
110 } Indeo3DecodeContext;
111
112
113 static uint8_t requant_tab[8][128];
114
115 /*
116 * Build the static requantization table.
117 * This table is used to remap pixel values according to a specific
118 * quant index and thus avoid overflows while adding deltas.
119 */
120 2 static av_cold void build_requant_tab(void)
121 {
122 static const int8_t offsets[8] = { 1, 1, 2, -3, -3, 3, 4, 4 };
123 static const int8_t deltas [8] = { 0, 1, 0, 4, 4, 1, 0, 1 };
124
125 int i, j, step;
126
127
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128 16 step = i + 2;
129
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 2064 for (j = 0; j < 128; j++)
130 2048 requant_tab[i][j] = (j + offsets[i]) / step * step + deltas[i];
131 }
132
133 /* some last elements calculated above will have values >= 128 */
134 /* pixel values shall never exceed 127 so set them to non-overflowing values */
135 /* according with the quantization step of the respective section */
136 2 requant_tab[0][127] = 126;
137 2 requant_tab[1][119] = 118;
138 2 requant_tab[1][120] = 118;
139 2 requant_tab[2][126] = 124;
140 2 requant_tab[2][127] = 124;
141 2 requant_tab[6][124] = 120;
142 2 requant_tab[6][125] = 120;
143 2 requant_tab[6][126] = 120;
144 2 requant_tab[6][127] = 120;
145
146 /* Patch for compatibility with the Intel's binary decoders */
147 2 requant_tab[1][7] = 10;
148 2 requant_tab[4][8] = 10;
149 2 }
150
151
152 4 static av_cold void free_frame_buffers(Indeo3DecodeContext *ctx)
153 {
154 int p;
155
156 4 ctx->width = ctx->height = 0;
157
158
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 16 for (p = 0; p < 3; p++) {
159 12 av_freep(&ctx->planes[p].buffers[0]);
160 12 av_freep(&ctx->planes[p].buffers[1]);
161 12 ctx->planes[p].pixels[0] = ctx->planes[p].pixels[1] = 0;
162 }
163 4 }
164
165
166 4 static av_cold int allocate_frame_buffers(Indeo3DecodeContext *ctx,
167 AVCodecContext *avctx, int luma_width, int luma_height)
168 {
169 int p, chroma_width, chroma_height;
170 int luma_size, chroma_size;
171 ptrdiff_t luma_pitch, chroma_pitch;
172
173
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 4 if (luma_width < 16 || luma_width > 640 ||
174
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 4 luma_height < 16 || luma_height > 480 ||
175
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 4 luma_width & 1 || luma_height & 1) {
176 ✗ av_log(avctx, AV_LOG_ERROR, "Invalid picture dimensions: %d x %d!\n",
177 luma_width, luma_height);
178 ✗ return AVERROR_INVALIDDATA;
179 }
180
181 4 ctx->width = luma_width ;
182 4 ctx->height = luma_height;
183
184 4 chroma_width = FFALIGN(luma_width >> 2, 4);
185 4 chroma_height = FFALIGN(luma_height >> 2, 4);
186
187 4 luma_pitch = FFALIGN(luma_width, 16);
188 4 chroma_pitch = FFALIGN(chroma_width, 16);
189
190 /* Calculate size of the luminance plane. */
191 /* Add one line more for INTRA prediction. */
192 4 luma_size = luma_pitch * (luma_height + 1);
193
194 /* Calculate size of a chrominance planes. */
195 /* Add one line more for INTRA prediction. */
196 4 chroma_size = chroma_pitch * (chroma_height + 1);
197
198 /* allocate frame buffers */
199
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 16 for (p = 0; p < 3; p++) {
200
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 12 ctx->planes[p].pitch = !p ? luma_pitch : chroma_pitch;
201
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 12 ctx->planes[p].width = !p ? luma_width : chroma_width;
202
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 12 ctx->planes[p].height = !p ? luma_height : chroma_height;
203
204
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 12 ctx->planes[p].buffers[0] = av_malloc(!p ? luma_size : chroma_size);
205
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 12 ctx->planes[p].buffers[1] = av_malloc(!p ? luma_size : chroma_size);
206
207
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 12 if (!ctx->planes[p].buffers[0] || !ctx->planes[p].buffers[1])
208 ✗ return AVERROR(ENOMEM);
209
210 /* fill the INTRA prediction lines with the middle pixel value = 64 */
211 12 memset(ctx->planes[p].buffers[0], 0x40, ctx->planes[p].pitch);
212 12 memset(ctx->planes[p].buffers[1], 0x40, ctx->planes[p].pitch);
213
214 /* set buffer pointers = buf_ptr + pitch and thus skip the INTRA prediction line */
215 12 ctx->planes[p].pixels[0] = ctx->planes[p].buffers[0] + ctx->planes[p].pitch;
216 12 ctx->planes[p].pixels[1] = ctx->planes[p].buffers[1] + ctx->planes[p].pitch;
217 12 memset(ctx->planes[p].pixels[0], 0, ctx->planes[p].pitch * ctx->planes[p].height);
218 12 memset(ctx->planes[p].pixels[1], 0, ctx->planes[p].pitch * ctx->planes[p].height);
219 }
220
221 4 return 0;
222 }
223
224 /**
225 * Copy pixels of the cell(x + mv_x, y + mv_y) from the previous frame into
226 * the cell(x, y) in the current frame.
227 *
228 * @param ctx pointer to the decoder context
229 * @param plane pointer to the plane descriptor
230 * @param cell pointer to the cell descriptor
231 */
232 1683 static int copy_cell(Indeo3DecodeContext *ctx, Plane *plane, Cell *cell)
233 {
234 int h, w, mv_x, mv_y, offset, offset_dst;
235 uint8_t *src, *dst;
236
237 /* setup output and reference pointers */
238 1683 offset_dst = (cell->ypos << 2) * plane->pitch + (cell->xpos << 2);
239 1683 dst = plane->pixels[ctx->buf_sel] + offset_dst;
240
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 1683 if(cell->mv_ptr){
241 1683 mv_y = cell->mv_ptr[0];
242 1683 mv_x = cell->mv_ptr[1];
243 }else
244 ✗ mv_x= mv_y= 0;
245
246 /* -1 because there is an extra line on top for prediction */
247
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 1683 if ((cell->ypos << 2) + mv_y < -1 || (cell->xpos << 2) + mv_x < 0 ||
248
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 1683 ((cell->ypos + cell->height) << 2) + mv_y > plane->height ||
249
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 1683 ((cell->xpos + cell->width) << 2) + mv_x > plane->width) {
250 ✗ av_log(ctx->avctx, AV_LOG_ERROR,
251 "Motion vectors point out of the frame.\n");
252 ✗ return AVERROR_INVALIDDATA;
253 }
254
255 1683 offset = offset_dst + mv_y * plane->pitch + mv_x;
256 1683 src = plane->pixels[ctx->buf_sel ^ 1] + offset;
257
258 1683 h = cell->height << 2;
259
260
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 4624 for (w = cell->width; w > 0;) {
261 /* copy using 16xH blocks */
262
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 2941 if (!((cell->xpos << 2) & 15) && w >= 4) {
263
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 1682 for (; w >= 4; src += 16, dst += 16, w -= 4)
264 841 ctx->hdsp.put_pixels_tab[0][0](dst, src, plane->pitch, h);
265 }
266
267 /* copy using 8xH blocks */
268
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 2941 if (!((cell->xpos << 2) & 7) && w >= 2) {
269 2519 ctx->hdsp.put_pixels_tab[1][0](dst, src, plane->pitch, h);
270 2519 w -= 2;
271 2519 src += 8;
272 2519 dst += 8;
273
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 422 } else if (w >= 1) {
274 ✗ ctx->hdsp.put_pixels_tab[2][0](dst, src, plane->pitch, h);
275 ✗ w--;
276 ✗ src += 4;
277 ✗ dst += 4;
278 }
279 }
280
281 1683 return 0;
282 }
283
284
285 /* Average 4/8 pixels at once without rounding using SWAR */
286 #define AVG_32(dst, src, ref) \
287 AV_WN32A(dst, ((AV_RN32(src) + AV_RN32(ref)) >> 1) & 0x7F7F7F7FUL)
288
289 #define AVG_64(dst, src, ref) \
290 AV_WN64A(dst, ((AV_RN64(src) + AV_RN64(ref)) >> 1) & 0x7F7F7F7F7F7F7F7FULL)
291
292
293 /*
294 * Replicate each even pixel as follows:
295 * ABCDEFGH -> AACCEEGG
296 */
297 3811 static inline uint64_t replicate64(uint64_t a) {
298 #if HAVE_BIGENDIAN
299 a &= 0xFF00FF00FF00FF00ULL;
300 a |= a >> 8;
301 #else
302 3811 a &= 0x00FF00FF00FF00FFULL;
303 3811 a |= a << 8;
304 #endif
305 3811 return a;
306 }
307
308 12140 static inline uint32_t replicate32(uint32_t a) {
309 #if HAVE_BIGENDIAN
310 a &= 0xFF00FF00UL;
311 a |= a >> 8;
312 #else
313 12140 a &= 0x00FF00FFUL;
314 12140 a |= a << 8;
315 #endif
316 12140 return a;
317 }
318
319
320 /* Fill n lines with 64-bit pixel value pix */
321 17347 static inline void fill_64(uint8_t *dst, const uint64_t pix, int32_t n,
322 int32_t row_offset)
323 {
324
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 128722 for (; n > 0; dst += row_offset, n--)
325 111375 AV_WN64A(dst, pix);
326 17347 }
327
328
329 /* Error codes for cell decoding. */
330 enum {
331 IV3_NOERR = 0,
332 IV3_BAD_RLE = 1,
333 IV3_BAD_DATA = 2,
334 IV3_BAD_COUNTER = 3,
335 IV3_UNSUPPORTED = 4,
336 IV3_OUT_OF_DATA = 5
337 };
338
339
340 #define BUFFER_PRECHECK \
341 if (*data_ptr >= last_ptr) \
342 return IV3_OUT_OF_DATA; \
343
344 #define RLE_BLOCK_COPY \
345 if (cell->mv_ptr || !skip_flag) \
346 copy_block4(dst, ref, row_offset, row_offset, 4 << v_zoom)
347
348 #define RLE_BLOCK_COPY_8 \
349 pix64 = AV_RN64(ref);\
350 if (is_first_row) {/* special prediction case: top line of a cell */\
351 pix64 = replicate64(pix64);\
352 fill_64(dst + row_offset, pix64, 7, row_offset);\
353 AVG_64(dst, ref, dst + row_offset);\
354 } else \
355 fill_64(dst, pix64, 8, row_offset)
356
357 #define RLE_LINES_COPY \
358 copy_block4(dst, ref, row_offset, row_offset, num_lines << v_zoom)
359
360 #define RLE_LINES_COPY_M10 \
361 pix64 = AV_RN64(ref);\
362 if (is_top_of_cell) {\
363 pix64 = replicate64(pix64);\
364 fill_64(dst + row_offset, pix64, (num_lines << 1) - 1, row_offset);\
365 AVG_64(dst, ref, dst + row_offset);\
366 } else \
367 fill_64(dst, pix64, num_lines << 1, row_offset)
368
369 #define APPLY_DELTA_4 \
370 AV_WN16A(dst + line_offset ,\
371 (AV_RN16(ref ) + delta_tab->deltas[dyad1]) & 0x7F7F);\
372 AV_WN16A(dst + line_offset + 2,\
373 (AV_RN16(ref + 2) + delta_tab->deltas[dyad2]) & 0x7F7F);\
374 if (mode >= 3) {\
375 if (is_top_of_cell && !cell->ypos) {\
376 AV_COPY32U(dst, dst + row_offset);\
377 } else {\
378 AVG_32(dst, ref, dst + row_offset);\
379 }\
380 }
381
382 #define APPLY_DELTA_8 \
383 /* apply two 32-bit VQ deltas to next even line */\
384 if (is_top_of_cell) { \
385 AV_WN32A(dst + row_offset , \
386 (replicate32(AV_RN32(ref )) + delta_tab->deltas_m10[dyad1]) & 0x7F7F7F7F);\
387 AV_WN32A(dst + row_offset + 4, \
388 (replicate32(AV_RN32(ref + 4)) + delta_tab->deltas_m10[dyad2]) & 0x7F7F7F7F);\
389 } else { \
390 AV_WN32A(dst + row_offset , \
391 (AV_RN32(ref ) + delta_tab->deltas_m10[dyad1]) & 0x7F7F7F7F);\
392 AV_WN32A(dst + row_offset + 4, \
393 (AV_RN32(ref + 4) + delta_tab->deltas_m10[dyad2]) & 0x7F7F7F7F);\
394 } \
395 /* odd lines are not coded but rather interpolated/replicated */\
396 /* first line of the cell on the top of image? - replicate */\
397 /* otherwise - interpolate */\
398 if (is_top_of_cell && !cell->ypos) {\
399 AV_COPY64U(dst, dst + row_offset);\
400 } else \
401 AVG_64(dst, ref, dst + row_offset);
402
403
404 #define APPLY_DELTA_1011_INTER \
405 if (mode == 10) { \
406 AV_WN32A(dst , \
407 (AV_RN32(dst ) + delta_tab->deltas_m10[dyad1]) & 0x7F7F7F7F);\
408 AV_WN32A(dst + 4 , \
409 (AV_RN32(dst + 4 ) + delta_tab->deltas_m10[dyad2]) & 0x7F7F7F7F);\
410 AV_WN32A(dst + row_offset , \
411 (AV_RN32(dst + row_offset ) + delta_tab->deltas_m10[dyad1]) & 0x7F7F7F7F);\
412 AV_WN32A(dst + row_offset + 4, \
413 (AV_RN32(dst + row_offset + 4) + delta_tab->deltas_m10[dyad2]) & 0x7F7F7F7F);\
414 } else { \
415 AV_WN16A(dst , \
416 (AV_RN16(dst ) + delta_tab->deltas[dyad1]) & 0x7F7F);\
417 AV_WN16A(dst + 2 , \
418 (AV_RN16(dst + 2 ) + delta_tab->deltas[dyad2]) & 0x7F7F);\
419 AV_WN16A(dst + row_offset , \
420 (AV_RN16(dst + row_offset ) + delta_tab->deltas[dyad1]) & 0x7F7F);\
421 AV_WN16A(dst + row_offset + 2, \
422 (AV_RN16(dst + row_offset + 2) + delta_tab->deltas[dyad2]) & 0x7F7F);\
423 }
424
425
426 15944 static int decode_cell_data(Indeo3DecodeContext *ctx, Cell *cell,
427 uint8_t *block, uint8_t *ref_block,
428 ptrdiff_t row_offset, int h_zoom, int v_zoom, int mode,
429 const vqEntry *delta[2], int swap_quads[2],
430 const uint8_t **data_ptr, const uint8_t *last_ptr)
431 {
432 int x, y, line, num_lines;
433 15944 int rle_blocks = 0;
434 uint8_t code, *dst, *ref;
435 const vqEntry *delta_tab;
436 unsigned int dyad1, dyad2;
437 uint64_t pix64;
438 15944 int skip_flag = 0, is_top_of_cell, is_first_row = 1;
439 int blk_row_offset, line_offset;
440
441 15944 blk_row_offset = (row_offset << (2 + v_zoom)) - (cell->width << 2);
442
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 15944 line_offset = v_zoom ? row_offset : 0;
443
444
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 15944 if (cell->height & v_zoom || cell->width & h_zoom)
445 ✗ return IV3_BAD_DATA;
446
447
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 93487 for (y = 0; y < cell->height; is_first_row = 0, y += 1 + v_zoom) {
448
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 427098 for (x = 0; x < cell->width; x += 1 + h_zoom) {
449 349555 ref = ref_block;
450 349555 dst = block;
451
452
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 349555 if (rle_blocks > 0) {
453
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 76314 if (mode <= 4) {
454
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 60984 RLE_BLOCK_COPY;
455
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 15330 } else if (mode == 10 && !cell->mv_ptr) {
456
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 8469 RLE_BLOCK_COPY_8;
457 }
458 76314 rle_blocks--;
459 } else {
460
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 1187685 for (line = 0; line < 4;) {
461 914444 num_lines = 1;
462
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 914444 is_top_of_cell = is_first_row && !line;
463
464 /* select primary VQ table for odd, secondary for even lines */
465
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 914444 if (mode <= 4)
466 842209 delta_tab = delta[line & 1];
467 else
468 72235 delta_tab = delta[1];
469
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 914444 BUFFER_PRECHECK;
470 914444 code = bytestream_get_byte(data_ptr);
471
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 914444 if (code < 248) {
472
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 809297 if (code < delta_tab->num_dyads) {
473
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 342912 BUFFER_PRECHECK;
474 342912 dyad1 = bytestream_get_byte(data_ptr);
475 342912 dyad2 = code;
476
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 342912 if (dyad1 >= delta_tab->num_dyads || dyad1 >= 248)
477 ✗ return IV3_BAD_DATA;
478 } else {
479 /* process QUADS */
480 466385 code -= delta_tab->num_dyads;
481 466385 dyad1 = code / delta_tab->quad_exp;
482 466385 dyad2 = code % delta_tab->quad_exp;
483
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 466385 if (swap_quads[line & 1])
484 ✗ FFSWAP(unsigned int, dyad1, dyad2);
485 }
486
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 809297 if (mode <= 4) {
487
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 748407 APPLY_DELTA_4;
488
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 60890 } else if (mode == 10 && !cell->mv_ptr) {
489
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 59579 APPLY_DELTA_8;
490 } else {
491
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 1311 APPLY_DELTA_1011_INTER;
492 }
493 } else {
494 /* process RLE codes */
495
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 105147 switch (code) {
496 11658 case RLE_ESC_FC:
497 11658 skip_flag = 0;
498 11658 rle_blocks = 1;
499 11658 code = 253;
500 /* FALLTHROUGH */
501 88796 case RLE_ESC_FF:
502 case RLE_ESC_FE:
503 case RLE_ESC_FD:
504 88796 num_lines = 257 - code - line;
505
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 88796 if (num_lines <= 0)
506 ✗ return IV3_BAD_RLE;
507
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 88796 if (mode <= 4) {
508 80567 RLE_LINES_COPY;
509
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 8229 } else if (mode == 10 && !cell->mv_ptr) {
510
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 7274 RLE_LINES_COPY_M10;
511 }
512 88796 break;
513 14291 case RLE_ESC_FB:
514
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 14291 BUFFER_PRECHECK;
515 14291 code = bytestream_get_byte(data_ptr);
516 14291 rle_blocks = (code & 0x1F) - 1; /* set block counter */
517
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 14291 if (code >= 64 || rle_blocks < 0)
518 ✗ return IV3_BAD_COUNTER;
519 14291 skip_flag = code & 0x20;
520 14291 num_lines = 4 - line; /* enforce next block processing */
521
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 14291 if (mode >= 10 || (cell->mv_ptr || !skip_flag)) {
522
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 14291 if (mode <= 4) {
523 11441 RLE_LINES_COPY;
524
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 2850 } else if (mode == 10 && !cell->mv_ptr) {
525
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 1604 RLE_LINES_COPY_M10;
526 }
527 }
528 14291 break;
529 570 case RLE_ESC_F9:
530 570 skip_flag = 1;
531 570 rle_blocks = 1;
532 /* FALLTHROUGH */
533 2060 case RLE_ESC_FA:
534
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 2060 if (line)
535 ✗ return IV3_BAD_RLE;
536 2060 num_lines = 4; /* enforce next block processing */
537
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 2060 if (cell->mv_ptr) {
538
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 2060 if (mode <= 4) {
539 1794 RLE_LINES_COPY;
540
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 266 } else if (mode == 10 && !cell->mv_ptr) {
541 ✗ RLE_LINES_COPY_M10;
542 }
543 }
544 2060 break;
545 ✗ default:
546 ✗ return IV3_UNSUPPORTED;
547 }
548 }
549
550 914444 line += num_lines;
551 914444 ref += row_offset * (num_lines << v_zoom);
552 914444 dst += row_offset * (num_lines << v_zoom);
553 }
554 }
555
556 /* move to next horizontal block */
557 349555 block += 4 << h_zoom;
558 349555 ref_block += 4 << h_zoom;
559 }
560
561 /* move to next line of blocks */
562 77543 ref_block += blk_row_offset;
563 77543 block += blk_row_offset;
564 }
565 15944 return IV3_NOERR;
566 }
567
568
569 /**
570 * Decode a vector-quantized cell.
571 * It consists of several routines, each of which handles one or more "modes"
572 * with which a cell can be encoded.
573 *
574 * @param ctx pointer to the decoder context
575 * @param avctx ptr to the AVCodecContext
576 * @param plane pointer to the plane descriptor
577 * @param cell pointer to the cell descriptor
578 * @param data_ptr pointer to the compressed data
579 * @param last_ptr pointer to the last byte to catch reads past end of buffer
580 * @return number of consumed bytes or negative number in case of error
581 */
582 15944 static int decode_cell(Indeo3DecodeContext *ctx, AVCodecContext *avctx,
583 Plane *plane, Cell *cell, const uint8_t *data_ptr,
584 const uint8_t *last_ptr)
585 {
586 int x, mv_x, mv_y, mode, vq_index, prim_indx, second_indx;
587 int zoom_fac;
588 15944 int offset, error = 0, swap_quads[2];
589 15944 uint8_t code, *block, *ref_block = 0;
590 const vqEntry *delta[2];
591 15944 const uint8_t *data_start = data_ptr;
592
593 /* get coding mode and VQ table index from the VQ descriptor byte */
594 15944 code = *data_ptr++;
595 15944 mode = code >> 4;
596 15944 vq_index = code & 0xF;
597
598 /* setup output and reference pointers */
599 15944 offset = (cell->ypos << 2) * plane->pitch + (cell->xpos << 2);
600 15944 block = plane->pixels[ctx->buf_sel] + offset;
601
602
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 15944 if (!cell->mv_ptr) {
603 /* use previous line as reference for INTRA cells */
604 12410 ref_block = block - plane->pitch;
605
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 3534 } else if (mode >= 10) {
606 /* for mode 10 and 11 INTER first copy the predicted cell into the current one */
607 /* so we don't need to do data copying for each RLE code later */
608 1227 int ret = copy_cell(ctx, plane, cell);
609
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 1227 if (ret < 0)
610 ✗ return ret;
611 } else {
612 /* set the pointer to the reference pixels for modes 0-4 INTER */
613 2307 mv_y = cell->mv_ptr[0];
614 2307 mv_x = cell->mv_ptr[1];
615
616 /* -1 because there is an extra line on top for prediction */
617
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 2307 if ((cell->ypos << 2) + mv_y < -1 || (cell->xpos << 2) + mv_x < 0 ||
618
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 2307 ((cell->ypos + cell->height) << 2) + mv_y > plane->height ||
619
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 2307 ((cell->xpos + cell->width) << 2) + mv_x > plane->width) {
620 ✗ av_log(ctx->avctx, AV_LOG_ERROR,
621 "Motion vectors point out of the frame.\n");
622 ✗ return AVERROR_INVALIDDATA;
623 }
624
625 2307 offset += mv_y * plane->pitch + mv_x;
626 2307 ref_block = plane->pixels[ctx->buf_sel ^ 1] + offset;
627 }
628
629 /* select VQ tables as follows: */
630 /* modes 0 and 3 use only the primary table for all lines in a block */
631 /* while modes 1 and 4 switch between primary and secondary tables on alternate lines */
632
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 15944 if (mode == 1 || mode == 4) {
633 ✗ code = ctx->alt_quant[vq_index];
634 ✗ prim_indx = (code >> 4) + ctx->cb_offset;
635 ✗ second_indx = (code & 0xF) + ctx->cb_offset;
636 } else {
637 15944 vq_index += ctx->cb_offset;
638 15944 prim_indx = second_indx = vq_index;
639 }
640
641
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 15944 if (prim_indx >= 24 || second_indx >= 24) {
642 ✗ av_log(avctx, AV_LOG_ERROR, "Invalid VQ table indexes! Primary: %d, secondary: %d!\n",
643 prim_indx, second_indx);
644 ✗ return AVERROR_INVALIDDATA;
645 }
646
647 15944 delta[0] = &vq_tab[second_indx];
648 15944 delta[1] = &vq_tab[prim_indx];
649 15944 swap_quads[0] = second_indx >= 16;
650 15944 swap_quads[1] = prim_indx >= 16;
651
652 /* requantize the prediction if VQ index of this cell differs from VQ index */
653 /* of the predicted cell in order to avoid overflows. */
654
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 15944 if (vq_index >= 8 && ref_block) {
655
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 263506 for (x = 0; x < cell->width << 2; x++)
656 251096 ref_block[x] = requant_tab[vq_index & 7][ref_block[x] & 127];
657 }
658
659 15944 error = IV3_NOERR;
660
661
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 15944 switch (mode) {
662 10783 case 0: /*------------------ MODES 0 & 1 (4x4 block processing) --------------------*/
663 case 1:
664 case 3: /*------------------ MODES 3 & 4 (4x8 block processing) --------------------*/
665 case 4:
666
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 10783 if (mode >= 3 && cell->mv_ptr) {
667 ✗ av_log(avctx, AV_LOG_ERROR, "Attempt to apply Mode 3/4 to an INTER cell!\n");
668 ✗ return AVERROR_INVALIDDATA;
669 }
670
671 10783 zoom_fac = mode >= 3;
672 10783 error = decode_cell_data(ctx, cell, block, ref_block, plane->pitch,
673 0, zoom_fac, mode, delta, swap_quads,
674 &data_ptr, last_ptr);
675 10783 break;
676 5161 case 10: /*-------------------- MODE 10 (8x8 block processing) ---------------------*/
677 case 11: /*----------------- MODE 11 (4x8 INTER block processing) ------------------*/
678
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 5161 if (mode == 10 && !cell->mv_ptr) { /* MODE 10 INTRA processing */
679 3934 error = decode_cell_data(ctx, cell, block, ref_block, plane->pitch,
680 1, 1, mode, delta, swap_quads,
681 &data_ptr, last_ptr);
682 } else { /* mode 10 and 11 INTER processing */
683
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 1227 if (mode == 11 && !cell->mv_ptr) {
684 ✗ av_log(avctx, AV_LOG_ERROR, "Attempt to use Mode 11 for an INTRA cell!\n");
685 ✗ return AVERROR_INVALIDDATA;
686 }
687
688 1227 zoom_fac = mode == 10;
689 1227 error = decode_cell_data(ctx, cell, block, ref_block, plane->pitch,
690 zoom_fac, 1, mode, delta, swap_quads,
691 &data_ptr, last_ptr);
692 }
693 5161 break;
694 ✗ default:
695 ✗ av_log(avctx, AV_LOG_ERROR, "Unsupported coding mode: %d\n", mode);
696 ✗ return AVERROR_INVALIDDATA;
697 }//switch mode
698
699
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 15944 switch (error) {
700 ✗ case IV3_BAD_RLE:
701 ✗ av_log(avctx, AV_LOG_ERROR, "Mode %d: RLE code %X is not allowed at the current line\n",
702 ✗ mode, data_ptr[-1]);
703 ✗ return AVERROR_INVALIDDATA;
704 ✗ case IV3_BAD_DATA:
705 ✗ av_log(avctx, AV_LOG_ERROR, "Mode %d: invalid VQ data\n", mode);
706 ✗ return AVERROR_INVALIDDATA;
707 ✗ case IV3_BAD_COUNTER:
708 ✗ av_log(avctx, AV_LOG_ERROR, "Mode %d: RLE-FB invalid counter: %d\n", mode, code);
709 ✗ return AVERROR_INVALIDDATA;
710 ✗ case IV3_UNSUPPORTED:
711 ✗ av_log(avctx, AV_LOG_ERROR, "Mode %d: unsupported RLE code: %X\n", mode, data_ptr[-1]);
712 ✗ return AVERROR_INVALIDDATA;
713 ✗ case IV3_OUT_OF_DATA:
714 ✗ av_log(avctx, AV_LOG_ERROR, "Mode %d: attempt to read past end of buffer\n", mode);
715 ✗ return AVERROR_INVALIDDATA;
716 }
717
718 15944 return data_ptr - data_start; /* report number of bytes consumed from the input buffer */
719 }
720
721
722 /* Binary tree codes. */
723 enum {
724 H_SPLIT = 0,
725 V_SPLIT = 1,
726 INTRA_NULL = 2,
727 INTER_DATA = 3
728 };
729
730
731 #define SPLIT_CELL(size, new_size) (new_size) = ((size) > 2) ? ((((size) + 2) >> 2) << 1) : 1
732
733 #define UPDATE_BITPOS(n) \
734 ctx->skip_bits += (n); \
735 ctx->need_resync = 1
736
737 #define RESYNC_BITSTREAM \
738 if (ctx->need_resync && !(get_bits_count(&ctx->gb) & 7)) { \
739 skip_bits_long(&ctx->gb, ctx->skip_bits); \
740 ctx->skip_bits = 0; \
741 ctx->need_resync = 0; \
742 }
743
744 #define CHECK_CELL \
745 if (curr_cell.xpos + curr_cell.width > (plane->width >> 2) || \
746 curr_cell.ypos + curr_cell.height > (plane->height >> 2)) { \
747 av_log(avctx, AV_LOG_ERROR, "Invalid cell: x=%d, y=%d, w=%d, h=%d\n", \
748 curr_cell.xpos, curr_cell.ypos, curr_cell.width, curr_cell.height); \
749 return AVERROR_INVALIDDATA; \
750 }
751
752
753 16400 static int parse_bintree(Indeo3DecodeContext *ctx, AVCodecContext *avctx,
754 Plane *plane, int code, Cell *ref_cell,
755 const int depth, const int strip_width)
756 {
757 Cell curr_cell;
758 int bytes_used, ret;
759
760
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 16400 if (depth <= 0) {
761 ✗ av_log(avctx, AV_LOG_ERROR, "Stack overflow (corrupted binary tree)!\n");
762 ✗ return AVERROR_INVALIDDATA; // unwind recursion
763 }
764
765 16400 curr_cell = *ref_cell; // clone parent cell
766
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 16400 if (code == H_SPLIT) {
767
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 5560 SPLIT_CELL(ref_cell->height, curr_cell.height);
768 5560 ref_cell->ypos += curr_cell.height;
769 5560 ref_cell->height -= curr_cell.height;
770
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 5560 if (ref_cell->height <= 0 || curr_cell.height <= 0)
771 ✗ return AVERROR_INVALIDDATA;
772
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 10840 } else if (code == V_SPLIT) {
773
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 10420 if (curr_cell.width > strip_width) {
774 /* split strip */
775
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 300 curr_cell.width = (curr_cell.width <= (strip_width << 1) ? 1 : 2) * strip_width;
776 } else
777
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 10120 SPLIT_CELL(ref_cell->width, curr_cell.width);
778 10420 ref_cell->xpos += curr_cell.width;
779 10420 ref_cell->width -= curr_cell.width;
780
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 10420 if (ref_cell->width <= 0 || curr_cell.width <= 0)
781 ✗ return AVERROR_INVALIDDATA;
782 }
783
784
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 37989 while (get_bits_left(&ctx->gb) >= 2) { /* loop until return */
785
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 37989 RESYNC_BITSTREAM;
786
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 37989 switch (code = get_bits(&ctx->gb, 2)) {
787 15980 case H_SPLIT:
788 case V_SPLIT:
789
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 15980 if (parse_bintree(ctx, avctx, plane, code, &curr_cell, depth - 1, strip_width))
790 ✗ return AVERROR_INVALIDDATA;
791 15980 break;
792 2829 case INTRA_NULL:
793
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 2829 if (!curr_cell.tree) { /* MC tree INTRA code */
794 2373 curr_cell.mv_ptr = 0; /* mark the current strip as INTRA */
795 2373 curr_cell.tree = 1; /* enter the VQ tree */
796 } else { /* VQ tree NULL code */
797
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 456 RESYNC_BITSTREAM;
798 456 code = get_bits(&ctx->gb, 2);
799
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 456 if (code >= 2) {
800 ✗ av_log(avctx, AV_LOG_ERROR, "Invalid VQ_NULL code: %d\n", code);
801 ✗ return AVERROR_INVALIDDATA;
802 }
803
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 456 if (code == 1)
804 ✗ av_log(avctx, AV_LOG_ERROR, "SkipCell procedure not implemented yet!\n");
805
806
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 456 CHECK_CELL
807
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 456 if (!curr_cell.mv_ptr)
808 ✗ return AVERROR_INVALIDDATA;
809
810 456 ret = copy_cell(ctx, plane, &curr_cell);
811 456 return ret;
812 }
813 2373 break;
814 19180 case INTER_DATA:
815
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 19180 if (!curr_cell.tree) { /* MC tree INTER code */
816 unsigned mv_idx;
817 /* get motion vector index and setup the pointer to the mv set */
818
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 3236 if (!ctx->need_resync)
819 1544 ctx->next_cell_data = &ctx->gb.buffer[(get_bits_count(&ctx->gb) + 7) >> 3];
820
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 3236 if (ctx->next_cell_data >= ctx->last_byte) {
821 ✗ av_log(avctx, AV_LOG_ERROR, "motion vector out of array\n");
822 ✗ return AVERROR_INVALIDDATA;
823 }
824 3236 mv_idx = *(ctx->next_cell_data++);
825
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 3236 if (mv_idx >= ctx->num_vectors) {
826 ✗ av_log(avctx, AV_LOG_ERROR, "motion vector index out of range\n");
827 ✗ return AVERROR_INVALIDDATA;
828 }
829 3236 curr_cell.mv_ptr = &ctx->mc_vectors[mv_idx << 1];
830 3236 curr_cell.tree = 1; /* enter the VQ tree */
831 3236 UPDATE_BITPOS(8);
832 } else { /* VQ tree DATA code */
833
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 15944 if (!ctx->need_resync)
834 7503 ctx->next_cell_data = &ctx->gb.buffer[(get_bits_count(&ctx->gb) + 7) >> 3];
835
836
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 15944 CHECK_CELL
837 15944 bytes_used = decode_cell(ctx, avctx, plane, &curr_cell,
838 ctx->next_cell_data, ctx->last_byte);
839
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 15944 if (bytes_used < 0)
840 ✗ return AVERROR_INVALIDDATA;
841
842 15944 UPDATE_BITPOS(bytes_used << 3);
843 15944 ctx->next_cell_data += bytes_used;
844 15944 return 0;
845 }
846 3236 break;
847 }
848 }//while
849
850 ✗ return AVERROR_INVALIDDATA;
851 }
852
853
854 420 static int decode_plane(Indeo3DecodeContext *ctx, AVCodecContext *avctx,
855 Plane *plane, const uint8_t *data, int32_t data_size,
856 int32_t strip_width)
857 {
858 Cell curr_cell;
859 unsigned num_vectors;
860
861 /* each plane data starts with mc_vector_count field, */
862 /* an optional array of motion vectors followed by the vq data */
863 420 num_vectors = bytestream_get_le32(&data); data_size -= 4;
864
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 420 if (num_vectors > 256) {
865 ✗ av_log(ctx->avctx, AV_LOG_ERROR,
866 "Read invalid number of motion vectors %d\n", num_vectors);
867 ✗ return AVERROR_INVALIDDATA;
868 }
869
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 420 if (num_vectors * 2 > data_size)
870 ✗ return AVERROR_INVALIDDATA;
871
872 420 ctx->num_vectors = num_vectors;
873
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 420 ctx->mc_vectors = num_vectors ? data : 0;
874
875 /* init the bitreader */
876 420 init_get_bits(&ctx->gb, &data[num_vectors * 2], (data_size - num_vectors * 2) << 3);
877 420 ctx->skip_bits = 0;
878 420 ctx->need_resync = 0;
879
880 420 ctx->last_byte = data + data_size;
881
882 /* initialize the 1st cell and set its dimensions to whole plane */
883 420 curr_cell.xpos = curr_cell.ypos = 0;
884 420 curr_cell.width = plane->width >> 2;
885 420 curr_cell.height = plane->height >> 2;
886 420 curr_cell.tree = 0; // we are in the MC tree now
887 420 curr_cell.mv_ptr = 0; // no motion vector = INTRA cell
888
889 420 return parse_bintree(ctx, avctx, plane, INTRA_NULL, &curr_cell, CELL_STACK_MAX, strip_width);
890 }
891
892
893 #define OS_HDR_ID MKBETAG('F', 'R', 'M', 'H')
894
895 140 static int decode_frame_headers(Indeo3DecodeContext *ctx, AVCodecContext *avctx,
896 const uint8_t *buf, int buf_size)
897 {
898 GetByteContext gb;
899 const uint8_t *bs_hdr;
900 uint32_t frame_num, word2, check_sum, data_size;
901 int y_offset, u_offset, v_offset;
902 uint32_t starts[3], ends[3];
903 uint16_t height, width;
904 int i, j;
905
906 140 bytestream2_init(&gb, buf, buf_size);
907
908 /* parse and check the OS header */
909 140 frame_num = bytestream2_get_le32(&gb);
910 140 word2 = bytestream2_get_le32(&gb);
911 140 check_sum = bytestream2_get_le32(&gb);
912 140 data_size = bytestream2_get_le32(&gb);
913
914
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 140 if ((frame_num ^ word2 ^ data_size ^ OS_HDR_ID) != check_sum) {
915 ✗ av_log(avctx, AV_LOG_ERROR, "OS header checksum mismatch!\n");
916 ✗ return AVERROR_INVALIDDATA;
917 }
918
919 /* parse the bitstream header */
920 140 bs_hdr = gb.buffer;
921
922
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 140 if (bytestream2_get_le16(&gb) != 32) {
923 ✗ av_log(avctx, AV_LOG_ERROR, "Unsupported codec version!\n");
924 ✗ return AVERROR_INVALIDDATA;
925 }
926
927 140 ctx->frame_num = frame_num;
928 140 ctx->frame_flags = bytestream2_get_le16(&gb);
929 140 ctx->data_size = (bytestream2_get_le32(&gb) + 7) >> 3;
930 140 ctx->cb_offset = bytestream2_get_byte(&gb);
931
932
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 140 if (ctx->data_size == 16)
933 ✗ return 4;
934
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 140 ctx->data_size = FFMIN(ctx->data_size, buf_size - 16);
935
936 140 bytestream2_skip(&gb, 3); // skip reserved byte and checksum
937
938 /* check frame dimensions */
939 140 height = bytestream2_get_le16(&gb);
940 140 width = bytestream2_get_le16(&gb);
941
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 140 if (av_image_check_size(width, height, 0, avctx))
942 ✗ return AVERROR_INVALIDDATA;
943
944
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 140 if (width != ctx->width || height != ctx->height) {
945 int res;
946
947 ff_dlog(avctx, "Frame dimensions changed!\n");
948
949 ✗ if (width < 16 || width > 640 ||
950 ✗ height < 16 || height > 480 ||
951 ✗ width & 3 || height & 3) {
952 ✗ av_log(avctx, AV_LOG_ERROR,
953 "Invalid picture dimensions: %d x %d!\n", width, height);
954 ✗ return AVERROR_INVALIDDATA;
955 }
956 ✗ free_frame_buffers(ctx);
957 ✗ if ((res = allocate_frame_buffers(ctx, avctx, width, height)) < 0)
958 ✗ return res;
959 ✗ if ((res = ff_set_dimensions(avctx, width, height)) < 0)
960 ✗ return res;
961 }
962
963 140 y_offset = bytestream2_get_le32(&gb);
964 140 v_offset = bytestream2_get_le32(&gb);
965 140 u_offset = bytestream2_get_le32(&gb);
966 140 bytestream2_skip(&gb, 4);
967
968 /* unfortunately there is no common order of planes in the buffer */
969 /* so we use that sorting algo for determining planes data sizes */
970 140 starts[0] = y_offset;
971 140 starts[1] = v_offset;
972 140 starts[2] = u_offset;
973
974
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 560 for (j = 0; j < 3; j++) {
975 420 ends[j] = ctx->data_size;
976
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 1680 for (i = 2; i >= 0; i--)
977
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 1260 if (starts[i] < ends[j] && starts[i] > starts[j])
978 280 ends[j] = starts[i];
979 }
980
981 140 ctx->y_data_size = ends[0] - starts[0];
982 140 ctx->v_data_size = ends[1] - starts[1];
983 140 ctx->u_data_size = ends[2] - starts[2];
984
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 140 if (FFMIN3(y_offset, v_offset, u_offset) < 0 ||
985
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 140 FFMAX3(y_offset, v_offset, u_offset) >= ctx->data_size - 16 ||
986
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 140 FFMIN3(y_offset, v_offset, u_offset) < gb.buffer - bs_hdr + 16 ||
987
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 140 FFMIN3(ctx->y_data_size, ctx->v_data_size, ctx->u_data_size) <= 0) {
988 ✗ av_log(avctx, AV_LOG_ERROR, "One of the y/u/v offsets is invalid\n");
989 ✗ return AVERROR_INVALIDDATA;
990 }
991
992 140 ctx->y_data_ptr = bs_hdr + y_offset;
993 140 ctx->v_data_ptr = bs_hdr + v_offset;
994 140 ctx->u_data_ptr = bs_hdr + u_offset;
995 140 ctx->alt_quant = gb.buffer;
996
997
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 140 if (ctx->data_size == 16) {
998 ✗ av_log(avctx, AV_LOG_DEBUG, "Sync frame encountered!\n");
999 ✗ return 16;
1000 }
1001
1002
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 140 if (ctx->frame_flags & BS_8BIT_PEL) {
1003 ✗ avpriv_request_sample(avctx, "8-bit pixel format");
1004 ✗ return AVERROR_PATCHWELCOME;
1005 }
1006
1007
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 140 if (ctx->frame_flags & BS_MV_X_HALF || ctx->frame_flags & BS_MV_Y_HALF) {
1008 ✗ avpriv_request_sample(avctx, "Halfpel motion vectors");
1009 ✗ return AVERROR_PATCHWELCOME;
1010 }
1011
1012 140 return 0;
1013 }
1014
1015
1016 /**
1017 * Convert and output the current plane.
1018 * All pixel values will be upsampled by shifting right by one bit.
1019 *
1020 * @param[in] plane pointer to the descriptor of the plane being processed
1021 * @param[in] buf_sel indicates which frame buffer the input data stored in
1022 * @param[out] dst pointer to the buffer receiving converted pixels
1023 * @param[in] dst_pitch pitch for moving to the next y line
1024 * @param[in] dst_height output plane height
1025 */
1026 420 static void output_plane(const Plane *plane, int buf_sel, uint8_t *dst,
1027 ptrdiff_t dst_pitch, int dst_height)
1028 {
1029 int x,y;
1030 420 const uint8_t *src = plane->pixels[buf_sel];
1031 420 ptrdiff_t pitch = plane->pitch;
1032
1033 420 dst_height = FFMIN(dst_height, plane->height);
1034
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 35820 for (y = 0; y < dst_height; y++) {
1035 /* convert four pixels at once using SWAR */
1036
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 1943400 for (x = 0; x < plane->width >> 2; x++) {
1037 1908000 AV_WN32A(dst, (AV_RN32A(src) & 0x7F7F7F7F) << 1);
1038 1908000 src += 4;
1039 1908000 dst += 4;
1040 }
1041
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 35400 for (x <<= 2; x < plane->width; x++)
1043 ✗ *dst++ = *src++ << 1;
1044
1045 35400 src += pitch - plane->width;
1046 35400 dst += dst_pitch - plane->width;
1047 }
1048 420 }
1049
1050
1051 4 static av_cold int decode_init(AVCodecContext *avctx)
1052 {
1053 static AVOnce init_static_once = AV_ONCE_INIT;
1054 4 Indeo3DecodeContext *ctx = avctx->priv_data;
1055
1056 4 ctx->avctx = avctx;
1057 4 avctx->pix_fmt = AV_PIX_FMT_YUV410P;
1058
1059 4 ff_thread_once(&init_static_once, build_requant_tab);
1060
1061 4 ff_hpeldsp_init(&ctx->hdsp, avctx->flags);
1062
1063 4 return allocate_frame_buffers(ctx, avctx, avctx->width, avctx->height);
1064 }
1065
1066
1067 140 static int decode_frame(AVCodecContext *avctx, void *data, int *got_frame,
1068 AVPacket *avpkt)
1069 {
1070 140 Indeo3DecodeContext *ctx = avctx->priv_data;
1071 140 const uint8_t *buf = avpkt->data;
1072 140 int buf_size = avpkt->size;
1073 140 AVFrame *frame = data;
1074 int res;
1075
1076 140 res = decode_frame_headers(ctx, avctx, buf, buf_size);
1077
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 140 if (res < 0)
1078 ✗ return res;
1079
1080 /* skip sync(null) frames */
1081
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 140 if (res) {
1082 // we have processed 16 bytes but no data was decoded
1083 ✗ *got_frame = 0;
1084 ✗ return buf_size;
1085 }
1086
1087 /* skip droppable INTER frames if requested */
1088
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 140 if (ctx->frame_flags & BS_NONREF &&
1089
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 32 (avctx->skip_frame >= AVDISCARD_NONREF))
1090 ✗ return 0;
1091
1092 /* skip INTER frames if requested */
1093
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 140 if (!(ctx->frame_flags & BS_KEYFRAME) && avctx->skip_frame >= AVDISCARD_NONKEY)
1094 ✗ return 0;
1095
1096 /* use BS_BUFFER flag for buffer switching */
1097 140 ctx->buf_sel = (ctx->frame_flags >> BS_BUFFER) & 1;
1098
1099
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 140 if ((res = ff_get_buffer(avctx, frame, 0)) < 0)
1100 ✗ return res;
1101
1102 /* decode luma plane */
1103
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 140 if ((res = decode_plane(ctx, avctx, ctx->planes, ctx->y_data_ptr, ctx->y_data_size, 40)))
1104 ✗ return res;
1105
1106 /* decode chroma planes */
1107
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 140 if ((res = decode_plane(ctx, avctx, &ctx->planes[1], ctx->u_data_ptr, ctx->u_data_size, 10)))
1108 ✗ return res;
1109
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 140 if ((res = decode_plane(ctx, avctx, &ctx->planes[2], ctx->v_data_ptr, ctx->v_data_size, 10)))
1111 ✗ return res;
1112
1113 140 output_plane(&ctx->planes[0], ctx->buf_sel,
1114 140 frame->data[0], frame->linesize[0],
1115 avctx->height);
1116 140 output_plane(&ctx->planes[1], ctx->buf_sel,
1117 140 frame->data[1], frame->linesize[1],
1118 140 (avctx->height + 3) >> 2);
1119 140 output_plane(&ctx->planes[2], ctx->buf_sel,
1120 140 frame->data[2], frame->linesize[2],
1121 140 (avctx->height + 3) >> 2);
1122
1123 140 *got_frame = 1;
1124
1125 140 return buf_size;
1126 }
1127
1128
1129 4 static av_cold int decode_close(AVCodecContext *avctx)
1130 {
1131 4 free_frame_buffers(avctx->priv_data);
1132
1133 4 return 0;
1134 }
1135
1136 const AVCodec ff_indeo3_decoder = {
1137 .name = "indeo3",
1138 .long_name = NULL_IF_CONFIG_SMALL("Intel Indeo 3"),
1139 .type = AVMEDIA_TYPE_VIDEO,
1140 .id = AV_CODEC_ID_INDEO3,
1141 .priv_data_size = sizeof(Indeo3DecodeContext),
1142 .init = decode_init,
1143 .close = decode_close,
1144 .decode = decode_frame,
1145 .capabilities = AV_CODEC_CAP_DR1,
1146 .caps_internal = FF_CODEC_CAP_INIT_THREADSAFE | FF_CODEC_CAP_INIT_CLEANUP,
1147 };
1148