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 "avcodec.h"
35 #include "copy_block.h"
36 #include "bytestream.h"
37 #include "get_bits.h"
38 #include "hpeldsp.h"
39 #include "internal.h"
40
41 #include "indeo3data.h"
42
43 /* RLE opcodes. */
44 enum {
45 RLE_ESC_F9 = 249, ///< same as RLE_ESC_FA + do the same with next block
46 RLE_ESC_FA = 250, ///< INTRA: skip block, INTER: copy data from reference
47 RLE_ESC_FB = 251, ///< apply null delta to N blocks / skip N blocks
48 RLE_ESC_FC = 252, ///< same as RLE_ESC_FD + do the same with next block
49 RLE_ESC_FD = 253, ///< apply null delta to all remaining lines of this block
50 RLE_ESC_FE = 254, ///< apply null delta to all lines up to the 3rd line
51 RLE_ESC_FF = 255 ///< apply null delta to all lines up to the 2nd line
52 };
53
54
55 /* Some constants for parsing frame bitstream flags. */
56 #define BS_8BIT_PEL (1 << 1) ///< 8-bit pixel bitdepth indicator
57 #define BS_KEYFRAME (1 << 2) ///< intra frame indicator
58 #define BS_MV_Y_HALF (1 << 4) ///< vertical mv halfpel resolution indicator
59 #define BS_MV_X_HALF (1 << 5) ///< horizontal mv halfpel resolution indicator
60 #define BS_NONREF (1 << 8) ///< nonref (discardable) frame indicator
61 #define BS_BUFFER 9 ///< indicates which of two frame buffers should be used
62
63
64 typedef struct Plane {
65 uint8_t *buffers[2];
66 uint8_t *pixels[2]; ///< pointer to the actual pixel data of the buffers above
67 uint32_t width;
68 uint32_t height;
69 ptrdiff_t pitch;
70 } Plane;
71
72 #define CELL_STACK_MAX 20
73
74 typedef struct Cell {
75 int16_t xpos; ///< cell coordinates in 4x4 blocks
76 int16_t ypos;
77 int16_t width; ///< cell width in 4x4 blocks
78 int16_t height; ///< cell height in 4x4 blocks
79 uint8_t tree; ///< tree id: 0- MC tree, 1 - VQ tree
80 const int8_t *mv_ptr; ///< ptr to the motion vector if any
81 } Cell;
82
83 typedef struct Indeo3DecodeContext {
84 AVCodecContext *avctx;
85 HpelDSPContext hdsp;
86
87 GetBitContext gb;
88 int need_resync;
89 int skip_bits;
90 const uint8_t *next_cell_data;
91 const uint8_t *last_byte;
92 const int8_t *mc_vectors;
93 unsigned num_vectors; ///< number of motion vectors in mc_vectors
94
95 int16_t width, height;
96 uint32_t frame_num; ///< current frame number (zero-based)
97 int data_size; ///< size of the frame data in bytes
98 uint16_t frame_flags; ///< frame properties
99 uint8_t cb_offset; ///< needed for selecting VQ tables
100 uint8_t buf_sel; ///< active frame buffer: 0 - primary, 1 -secondary
101 const uint8_t *y_data_ptr;
102 const uint8_t *v_data_ptr;
103 const uint8_t *u_data_ptr;
104 int32_t y_data_size;
105 int32_t v_data_size;
106 int32_t u_data_size;
107 const uint8_t *alt_quant; ///< secondary VQ table set for the modes 1 and 4
108 Plane planes[3];
109 } Indeo3DecodeContext;
110
111
112 static uint8_t requant_tab[8][128];
113
114 /*
115 * Build the static requantization table.
116 * This table is used to remap pixel values according to a specific
117 * quant index and thus avoid overflows while adding deltas.
118 */
build_requant_tab(void)119 static av_cold void build_requant_tab(void)
120 {
121 static const int8_t offsets[8] = { 1, 1, 2, -3, -3, 3, 4, 4 };
122 static const int8_t deltas [8] = { 0, 1, 0, 4, 4, 1, 0, 1 };
123
124 int i, j, step;
125
126 for (i = 0; i < 8; i++) {
127 step = i + 2;
128 for (j = 0; j < 128; j++)
129 requant_tab[i][j] = (j + offsets[i]) / step * step + deltas[i];
130 }
131
132 /* some last elements calculated above will have values >= 128 */
133 /* pixel values shall never exceed 127 so set them to non-overflowing values */
134 /* according with the quantization step of the respective section */
135 requant_tab[0][127] = 126;
136 requant_tab[1][119] = 118;
137 requant_tab[1][120] = 118;
138 requant_tab[2][126] = 124;
139 requant_tab[2][127] = 124;
140 requant_tab[6][124] = 120;
141 requant_tab[6][125] = 120;
142 requant_tab[6][126] = 120;
143 requant_tab[6][127] = 120;
144
145 /* Patch for compatibility with the Intel's binary decoders */
146 requant_tab[1][7] = 10;
147 requant_tab[4][8] = 10;
148 }
149
150
free_frame_buffers(Indeo3DecodeContext * ctx)151 static av_cold void free_frame_buffers(Indeo3DecodeContext *ctx)
152 {
153 int p;
154
155 ctx->width = ctx->height = 0;
156
157 for (p = 0; p < 3; p++) {
158 av_freep(&ctx->planes[p].buffers[0]);
159 av_freep(&ctx->planes[p].buffers[1]);
160 ctx->planes[p].pixels[0] = ctx->planes[p].pixels[1] = 0;
161 }
162 }
163
164
allocate_frame_buffers(Indeo3DecodeContext * ctx,AVCodecContext * avctx,int luma_width,int luma_height)165 static av_cold int allocate_frame_buffers(Indeo3DecodeContext *ctx,
166 AVCodecContext *avctx, int luma_width, int luma_height)
167 {
168 int p, chroma_width, chroma_height;
169 int luma_size, chroma_size;
170 ptrdiff_t luma_pitch, chroma_pitch;
171
172 if (luma_width < 16 || luma_width > 640 ||
173 luma_height < 16 || luma_height > 480 ||
174 luma_width & 1 || luma_height & 1) {
175 av_log(avctx, AV_LOG_ERROR, "Invalid picture dimensions: %d x %d!\n",
176 luma_width, luma_height);
177 return AVERROR_INVALIDDATA;
178 }
179
180 ctx->width = luma_width ;
181 ctx->height = luma_height;
182
183 chroma_width = FFALIGN(luma_width >> 2, 4);
184 chroma_height = FFALIGN(luma_height >> 2, 4);
185
186 luma_pitch = FFALIGN(luma_width, 16);
187 chroma_pitch = FFALIGN(chroma_width, 16);
188
189 /* Calculate size of the luminance plane. */
190 /* Add one line more for INTRA prediction. */
191 luma_size = luma_pitch * (luma_height + 1);
192
193 /* Calculate size of a chrominance planes. */
194 /* Add one line more for INTRA prediction. */
195 chroma_size = chroma_pitch * (chroma_height + 1);
196
197 /* allocate frame buffers */
198 for (p = 0; p < 3; p++) {
199 ctx->planes[p].pitch = !p ? luma_pitch : chroma_pitch;
200 ctx->planes[p].width = !p ? luma_width : chroma_width;
201 ctx->planes[p].height = !p ? luma_height : chroma_height;
202
203 ctx->planes[p].buffers[0] = av_malloc(!p ? luma_size : chroma_size);
204 ctx->planes[p].buffers[1] = av_malloc(!p ? luma_size : chroma_size);
205
206 if (!ctx->planes[p].buffers[0] || !ctx->planes[p].buffers[1])
207 return AVERROR(ENOMEM);
208
209 /* fill the INTRA prediction lines with the middle pixel value = 64 */
210 memset(ctx->planes[p].buffers[0], 0x40, ctx->planes[p].pitch);
211 memset(ctx->planes[p].buffers[1], 0x40, ctx->planes[p].pitch);
212
213 /* set buffer pointers = buf_ptr + pitch and thus skip the INTRA prediction line */
214 ctx->planes[p].pixels[0] = ctx->planes[p].buffers[0] + ctx->planes[p].pitch;
215 ctx->planes[p].pixels[1] = ctx->planes[p].buffers[1] + ctx->planes[p].pitch;
216 memset(ctx->planes[p].pixels[0], 0, ctx->planes[p].pitch * ctx->planes[p].height);
217 memset(ctx->planes[p].pixels[1], 0, ctx->planes[p].pitch * ctx->planes[p].height);
218 }
219
220 return 0;
221 }
222
223 /**
224 * Copy pixels of the cell(x + mv_x, y + mv_y) from the previous frame into
225 * the cell(x, y) in the current frame.
226 *
227 * @param ctx pointer to the decoder context
228 * @param plane pointer to the plane descriptor
229 * @param cell pointer to the cell descriptor
230 */
copy_cell(Indeo3DecodeContext * ctx,Plane * plane,Cell * cell)231 static int copy_cell(Indeo3DecodeContext *ctx, Plane *plane, Cell *cell)
232 {
233 int h, w, mv_x, mv_y, offset, offset_dst;
234 uint8_t *src, *dst;
235
236 /* setup output and reference pointers */
237 offset_dst = (cell->ypos << 2) * plane->pitch + (cell->xpos << 2);
238 dst = plane->pixels[ctx->buf_sel] + offset_dst;
239 if(cell->mv_ptr){
240 mv_y = cell->mv_ptr[0];
241 mv_x = cell->mv_ptr[1];
242 }else
243 mv_x= mv_y= 0;
244
245 /* -1 because there is an extra line on top for prediction */
246 if ((cell->ypos << 2) + mv_y < -1 || (cell->xpos << 2) + mv_x < 0 ||
247 ((cell->ypos + cell->height) << 2) + mv_y > plane->height ||
248 ((cell->xpos + cell->width) << 2) + mv_x > plane->width) {
249 av_log(ctx->avctx, AV_LOG_ERROR,
250 "Motion vectors point out of the frame.\n");
251 return AVERROR_INVALIDDATA;
252 }
253
254 offset = offset_dst + mv_y * plane->pitch + mv_x;
255 src = plane->pixels[ctx->buf_sel ^ 1] + offset;
256
257 h = cell->height << 2;
258
259 for (w = cell->width; w > 0;) {
260 /* copy using 16xH blocks */
261 if (!((cell->xpos << 2) & 15) && w >= 4) {
262 for (; w >= 4; src += 16, dst += 16, w -= 4)
263 ctx->hdsp.put_pixels_tab[0][0](dst, src, plane->pitch, h);
264 }
265
266 /* copy using 8xH blocks */
267 if (!((cell->xpos << 2) & 7) && w >= 2) {
268 ctx->hdsp.put_pixels_tab[1][0](dst, src, plane->pitch, h);
269 w -= 2;
270 src += 8;
271 dst += 8;
272 } else if (w >= 1) {
273 ctx->hdsp.put_pixels_tab[2][0](dst, src, plane->pitch, h);
274 w--;
275 src += 4;
276 dst += 4;
277 }
278 }
279
280 return 0;
281 }
282
283
284 /* Average 4/8 pixels at once without rounding using SWAR */
285 #define AVG_32(dst, src, ref) \
286 AV_WN32A(dst, ((AV_RN32(src) + AV_RN32(ref)) >> 1) & 0x7F7F7F7FUL)
287
288 #define AVG_64(dst, src, ref) \
289 AV_WN64A(dst, ((AV_RN64(src) + AV_RN64(ref)) >> 1) & 0x7F7F7F7F7F7F7F7FULL)
290
291
292 /*
293 * Replicate each even pixel as follows:
294 * ABCDEFGH -> AACCEEGG
295 */
replicate64(uint64_t a)296 static inline uint64_t replicate64(uint64_t a) {
297 #if HAVE_BIGENDIAN
298 a &= 0xFF00FF00FF00FF00ULL;
299 a |= a >> 8;
300 #else
301 a &= 0x00FF00FF00FF00FFULL;
302 a |= a << 8;
303 #endif
304 return a;
305 }
306
replicate32(uint32_t a)307 static inline uint32_t replicate32(uint32_t a) {
308 #if HAVE_BIGENDIAN
309 a &= 0xFF00FF00UL;
310 a |= a >> 8;
311 #else
312 a &= 0x00FF00FFUL;
313 a |= a << 8;
314 #endif
315 return a;
316 }
317
318
319 /* Fill n lines with 64-bit pixel value pix */
fill_64(uint8_t * dst,const uint64_t pix,int32_t n,int32_t row_offset)320 static inline void fill_64(uint8_t *dst, const uint64_t pix, int32_t n,
321 int32_t row_offset)
322 {
323 for (; n > 0; dst += row_offset, n--)
324 AV_WN64A(dst, pix);
325 }
326
327
328 /* Error codes for cell decoding. */
329 enum {
330 IV3_NOERR = 0,
331 IV3_BAD_RLE = 1,
332 IV3_BAD_DATA = 2,
333 IV3_BAD_COUNTER = 3,
334 IV3_UNSUPPORTED = 4,
335 IV3_OUT_OF_DATA = 5
336 };
337
338
339 #define BUFFER_PRECHECK \
340 if (*data_ptr >= last_ptr) \
341 return IV3_OUT_OF_DATA; \
342
343 #define RLE_BLOCK_COPY \
344 if (cell->mv_ptr || !skip_flag) \
345 copy_block4(dst, ref, row_offset, row_offset, 4 << v_zoom)
346
347 #define RLE_BLOCK_COPY_8 \
348 pix64 = AV_RN64(ref);\
349 if (is_first_row) {/* special prediction case: top line of a cell */\
350 pix64 = replicate64(pix64);\
351 fill_64(dst + row_offset, pix64, 7, row_offset);\
352 AVG_64(dst, ref, dst + row_offset);\
353 } else \
354 fill_64(dst, pix64, 8, row_offset)
355
356 #define RLE_LINES_COPY \
357 copy_block4(dst, ref, row_offset, row_offset, num_lines << v_zoom)
358
359 #define RLE_LINES_COPY_M10 \
360 pix64 = AV_RN64(ref);\
361 if (is_top_of_cell) {\
362 pix64 = replicate64(pix64);\
363 fill_64(dst + row_offset, pix64, (num_lines << 1) - 1, row_offset);\
364 AVG_64(dst, ref, dst + row_offset);\
365 } else \
366 fill_64(dst, pix64, num_lines << 1, row_offset)
367
368 #define APPLY_DELTA_4 \
369 AV_WN16A(dst + line_offset ,\
370 (AV_RN16(ref ) + delta_tab->deltas[dyad1]) & 0x7F7F);\
371 AV_WN16A(dst + line_offset + 2,\
372 (AV_RN16(ref + 2) + delta_tab->deltas[dyad2]) & 0x7F7F);\
373 if (mode >= 3) {\
374 if (is_top_of_cell && !cell->ypos) {\
375 AV_COPY32U(dst, dst + row_offset);\
376 } else {\
377 AVG_32(dst, ref, dst + row_offset);\
378 }\
379 }
380
381 #define APPLY_DELTA_8 \
382 /* apply two 32-bit VQ deltas to next even line */\
383 if (is_top_of_cell) { \
384 AV_WN32A(dst + row_offset , \
385 (replicate32(AV_RN32(ref )) + delta_tab->deltas_m10[dyad1]) & 0x7F7F7F7F);\
386 AV_WN32A(dst + row_offset + 4, \
387 (replicate32(AV_RN32(ref + 4)) + delta_tab->deltas_m10[dyad2]) & 0x7F7F7F7F);\
388 } else { \
389 AV_WN32A(dst + row_offset , \
390 (AV_RN32(ref ) + delta_tab->deltas_m10[dyad1]) & 0x7F7F7F7F);\
391 AV_WN32A(dst + row_offset + 4, \
392 (AV_RN32(ref + 4) + delta_tab->deltas_m10[dyad2]) & 0x7F7F7F7F);\
393 } \
394 /* odd lines are not coded but rather interpolated/replicated */\
395 /* first line of the cell on the top of image? - replicate */\
396 /* otherwise - interpolate */\
397 if (is_top_of_cell && !cell->ypos) {\
398 AV_COPY64U(dst, dst + row_offset);\
399 } else \
400 AVG_64(dst, ref, dst + row_offset);
401
402
403 #define APPLY_DELTA_1011_INTER \
404 if (mode == 10) { \
405 AV_WN32A(dst , \
406 (AV_RN32(dst ) + delta_tab->deltas_m10[dyad1]) & 0x7F7F7F7F);\
407 AV_WN32A(dst + 4 , \
408 (AV_RN32(dst + 4 ) + delta_tab->deltas_m10[dyad2]) & 0x7F7F7F7F);\
409 AV_WN32A(dst + row_offset , \
410 (AV_RN32(dst + row_offset ) + delta_tab->deltas_m10[dyad1]) & 0x7F7F7F7F);\
411 AV_WN32A(dst + row_offset + 4, \
412 (AV_RN32(dst + row_offset + 4) + delta_tab->deltas_m10[dyad2]) & 0x7F7F7F7F);\
413 } else { \
414 AV_WN16A(dst , \
415 (AV_RN16(dst ) + delta_tab->deltas[dyad1]) & 0x7F7F);\
416 AV_WN16A(dst + 2 , \
417 (AV_RN16(dst + 2 ) + delta_tab->deltas[dyad2]) & 0x7F7F);\
418 AV_WN16A(dst + row_offset , \
419 (AV_RN16(dst + row_offset ) + delta_tab->deltas[dyad1]) & 0x7F7F);\
420 AV_WN16A(dst + row_offset + 2, \
421 (AV_RN16(dst + row_offset + 2) + delta_tab->deltas[dyad2]) & 0x7F7F);\
422 }
423
424
decode_cell_data(Indeo3DecodeContext * ctx,Cell * cell,uint8_t * block,uint8_t * ref_block,ptrdiff_t row_offset,int h_zoom,int v_zoom,int mode,const vqEntry * delta[2],int swap_quads[2],const uint8_t ** data_ptr,const uint8_t * last_ptr)425 static int decode_cell_data(Indeo3DecodeContext *ctx, Cell *cell,
426 uint8_t *block, uint8_t *ref_block,
427 ptrdiff_t row_offset, int h_zoom, int v_zoom, int mode,
428 const vqEntry *delta[2], int swap_quads[2],
429 const uint8_t **data_ptr, const uint8_t *last_ptr)
430 {
431 int x, y, line, num_lines;
432 int rle_blocks = 0;
433 uint8_t code, *dst, *ref;
434 const vqEntry *delta_tab;
435 unsigned int dyad1, dyad2;
436 uint64_t pix64;
437 int skip_flag = 0, is_top_of_cell, is_first_row = 1;
438 int blk_row_offset, line_offset;
439
440 blk_row_offset = (row_offset << (2 + v_zoom)) - (cell->width << 2);
441 line_offset = v_zoom ? row_offset : 0;
442
443 if (cell->height & v_zoom || cell->width & h_zoom)
444 return IV3_BAD_DATA;
445
446 for (y = 0; y < cell->height; is_first_row = 0, y += 1 + v_zoom) {
447 for (x = 0; x < cell->width; x += 1 + h_zoom) {
448 ref = ref_block;
449 dst = block;
450
451 if (rle_blocks > 0) {
452 if (mode <= 4) {
453 RLE_BLOCK_COPY;
454 } else if (mode == 10 && !cell->mv_ptr) {
455 RLE_BLOCK_COPY_8;
456 }
457 rle_blocks--;
458 } else {
459 for (line = 0; line < 4;) {
460 num_lines = 1;
461 is_top_of_cell = is_first_row && !line;
462
463 /* select primary VQ table for odd, secondary for even lines */
464 if (mode <= 4)
465 delta_tab = delta[line & 1];
466 else
467 delta_tab = delta[1];
468 BUFFER_PRECHECK;
469 code = bytestream_get_byte(data_ptr);
470 if (code < 248) {
471 if (code < delta_tab->num_dyads) {
472 BUFFER_PRECHECK;
473 dyad1 = bytestream_get_byte(data_ptr);
474 dyad2 = code;
475 if (dyad1 >= delta_tab->num_dyads || dyad1 >= 248)
476 return IV3_BAD_DATA;
477 } else {
478 /* process QUADS */
479 code -= delta_tab->num_dyads;
480 dyad1 = code / delta_tab->quad_exp;
481 dyad2 = code % delta_tab->quad_exp;
482 if (swap_quads[line & 1])
483 FFSWAP(unsigned int, dyad1, dyad2);
484 }
485 if (mode <= 4) {
486 APPLY_DELTA_4;
487 } else if (mode == 10 && !cell->mv_ptr) {
488 APPLY_DELTA_8;
489 } else {
490 APPLY_DELTA_1011_INTER;
491 }
492 } else {
493 /* process RLE codes */
494 switch (code) {
495 case RLE_ESC_FC:
496 skip_flag = 0;
497 rle_blocks = 1;
498 code = 253;
499 /* FALLTHROUGH */
500 case RLE_ESC_FF:
501 case RLE_ESC_FE:
502 case RLE_ESC_FD:
503 num_lines = 257 - code - line;
504 if (num_lines <= 0)
505 return IV3_BAD_RLE;
506 if (mode <= 4) {
507 RLE_LINES_COPY;
508 } else if (mode == 10 && !cell->mv_ptr) {
509 RLE_LINES_COPY_M10;
510 }
511 break;
512 case RLE_ESC_FB:
513 BUFFER_PRECHECK;
514 code = bytestream_get_byte(data_ptr);
515 rle_blocks = (code & 0x1F) - 1; /* set block counter */
516 if (code >= 64 || rle_blocks < 0)
517 return IV3_BAD_COUNTER;
518 skip_flag = code & 0x20;
519 num_lines = 4 - line; /* enforce next block processing */
520 if (mode >= 10 || (cell->mv_ptr || !skip_flag)) {
521 if (mode <= 4) {
522 RLE_LINES_COPY;
523 } else if (mode == 10 && !cell->mv_ptr) {
524 RLE_LINES_COPY_M10;
525 }
526 }
527 break;
528 case RLE_ESC_F9:
529 skip_flag = 1;
530 rle_blocks = 1;
531 /* FALLTHROUGH */
532 case RLE_ESC_FA:
533 if (line)
534 return IV3_BAD_RLE;
535 num_lines = 4; /* enforce next block processing */
536 if (cell->mv_ptr) {
537 if (mode <= 4) {
538 RLE_LINES_COPY;
539 } else if (mode == 10 && !cell->mv_ptr) {
540 RLE_LINES_COPY_M10;
541 }
542 }
543 break;
544 default:
545 return IV3_UNSUPPORTED;
546 }
547 }
548
549 line += num_lines;
550 ref += row_offset * (num_lines << v_zoom);
551 dst += row_offset * (num_lines << v_zoom);
552 }
553 }
554
555 /* move to next horizontal block */
556 block += 4 << h_zoom;
557 ref_block += 4 << h_zoom;
558 }
559
560 /* move to next line of blocks */
561 ref_block += blk_row_offset;
562 block += blk_row_offset;
563 }
564 return IV3_NOERR;
565 }
566
567
568 /**
569 * Decode a vector-quantized cell.
570 * It consists of several routines, each of which handles one or more "modes"
571 * with which a cell can be encoded.
572 *
573 * @param ctx pointer to the decoder context
574 * @param avctx ptr to the AVCodecContext
575 * @param plane pointer to the plane descriptor
576 * @param cell pointer to the cell descriptor
577 * @param data_ptr pointer to the compressed data
578 * @param last_ptr pointer to the last byte to catch reads past end of buffer
579 * @return number of consumed bytes or negative number in case of error
580 */
decode_cell(Indeo3DecodeContext * ctx,AVCodecContext * avctx,Plane * plane,Cell * cell,const uint8_t * data_ptr,const uint8_t * last_ptr)581 static int decode_cell(Indeo3DecodeContext *ctx, AVCodecContext *avctx,
582 Plane *plane, Cell *cell, const uint8_t *data_ptr,
583 const uint8_t *last_ptr)
584 {
585 int x, mv_x, mv_y, mode, vq_index, prim_indx, second_indx;
586 int zoom_fac;
587 int offset, error = 0, swap_quads[2];
588 uint8_t code, *block, *ref_block = 0;
589 const vqEntry *delta[2];
590 const uint8_t *data_start = data_ptr;
591
592 /* get coding mode and VQ table index from the VQ descriptor byte */
593 code = *data_ptr++;
594 mode = code >> 4;
595 vq_index = code & 0xF;
596
597 /* setup output and reference pointers */
598 offset = (cell->ypos << 2) * plane->pitch + (cell->xpos << 2);
599 block = plane->pixels[ctx->buf_sel] + offset;
600
601 if (!cell->mv_ptr) {
602 /* use previous line as reference for INTRA cells */
603 ref_block = block - plane->pitch;
604 } else if (mode >= 10) {
605 /* for mode 10 and 11 INTER first copy the predicted cell into the current one */
606 /* so we don't need to do data copying for each RLE code later */
607 int ret = copy_cell(ctx, plane, cell);
608 if (ret < 0)
609 return ret;
610 } else {
611 /* set the pointer to the reference pixels for modes 0-4 INTER */
612 mv_y = cell->mv_ptr[0];
613 mv_x = cell->mv_ptr[1];
614
615 /* -1 because there is an extra line on top for prediction */
616 if ((cell->ypos << 2) + mv_y < -1 || (cell->xpos << 2) + mv_x < 0 ||
617 ((cell->ypos + cell->height) << 2) + mv_y > plane->height ||
618 ((cell->xpos + cell->width) << 2) + mv_x > plane->width) {
619 av_log(ctx->avctx, AV_LOG_ERROR,
620 "Motion vectors point out of the frame.\n");
621 return AVERROR_INVALIDDATA;
622 }
623
624 offset += mv_y * plane->pitch + mv_x;
625 ref_block = plane->pixels[ctx->buf_sel ^ 1] + offset;
626 }
627
628 /* select VQ tables as follows: */
629 /* modes 0 and 3 use only the primary table for all lines in a block */
630 /* while modes 1 and 4 switch between primary and secondary tables on alternate lines */
631 if (mode == 1 || mode == 4) {
632 code = ctx->alt_quant[vq_index];
633 prim_indx = (code >> 4) + ctx->cb_offset;
634 second_indx = (code & 0xF) + ctx->cb_offset;
635 } else {
636 vq_index += ctx->cb_offset;
637 prim_indx = second_indx = vq_index;
638 }
639
640 if (prim_indx >= 24 || second_indx >= 24) {
641 av_log(avctx, AV_LOG_ERROR, "Invalid VQ table indexes! Primary: %d, secondary: %d!\n",
642 prim_indx, second_indx);
643 return AVERROR_INVALIDDATA;
644 }
645
646 delta[0] = &vq_tab[second_indx];
647 delta[1] = &vq_tab[prim_indx];
648 swap_quads[0] = second_indx >= 16;
649 swap_quads[1] = prim_indx >= 16;
650
651 /* requantize the prediction if VQ index of this cell differs from VQ index */
652 /* of the predicted cell in order to avoid overflows. */
653 if (vq_index >= 8 && ref_block) {
654 for (x = 0; x < cell->width << 2; x++)
655 ref_block[x] = requant_tab[vq_index & 7][ref_block[x] & 127];
656 }
657
658 error = IV3_NOERR;
659
660 switch (mode) {
661 case 0: /*------------------ MODES 0 & 1 (4x4 block processing) --------------------*/
662 case 1:
663 case 3: /*------------------ MODES 3 & 4 (4x8 block processing) --------------------*/
664 case 4:
665 if (mode >= 3 && cell->mv_ptr) {
666 av_log(avctx, AV_LOG_ERROR, "Attempt to apply Mode 3/4 to an INTER cell!\n");
667 return AVERROR_INVALIDDATA;
668 }
669
670 zoom_fac = mode >= 3;
671 error = decode_cell_data(ctx, cell, block, ref_block, plane->pitch,
672 0, zoom_fac, mode, delta, swap_quads,
673 &data_ptr, last_ptr);
674 break;
675 case 10: /*-------------------- MODE 10 (8x8 block processing) ---------------------*/
676 case 11: /*----------------- MODE 11 (4x8 INTER block processing) ------------------*/
677 if (mode == 10 && !cell->mv_ptr) { /* MODE 10 INTRA processing */
678 error = decode_cell_data(ctx, cell, block, ref_block, plane->pitch,
679 1, 1, mode, delta, swap_quads,
680 &data_ptr, last_ptr);
681 } else { /* mode 10 and 11 INTER processing */
682 if (mode == 11 && !cell->mv_ptr) {
683 av_log(avctx, AV_LOG_ERROR, "Attempt to use Mode 11 for an INTRA cell!\n");
684 return AVERROR_INVALIDDATA;
685 }
686
687 zoom_fac = mode == 10;
688 error = decode_cell_data(ctx, cell, block, ref_block, plane->pitch,
689 zoom_fac, 1, mode, delta, swap_quads,
690 &data_ptr, last_ptr);
691 }
692 break;
693 default:
694 av_log(avctx, AV_LOG_ERROR, "Unsupported coding mode: %d\n", mode);
695 return AVERROR_INVALIDDATA;
696 }//switch mode
697
698 switch (error) {
699 case IV3_BAD_RLE:
700 av_log(avctx, AV_LOG_ERROR, "Mode %d: RLE code %X is not allowed at the current line\n",
701 mode, data_ptr[-1]);
702 return AVERROR_INVALIDDATA;
703 case IV3_BAD_DATA:
704 av_log(avctx, AV_LOG_ERROR, "Mode %d: invalid VQ data\n", mode);
705 return AVERROR_INVALIDDATA;
706 case IV3_BAD_COUNTER:
707 av_log(avctx, AV_LOG_ERROR, "Mode %d: RLE-FB invalid counter: %d\n", mode, code);
708 return AVERROR_INVALIDDATA;
709 case IV3_UNSUPPORTED:
710 av_log(avctx, AV_LOG_ERROR, "Mode %d: unsupported RLE code: %X\n", mode, data_ptr[-1]);
711 return AVERROR_INVALIDDATA;
712 case IV3_OUT_OF_DATA:
713 av_log(avctx, AV_LOG_ERROR, "Mode %d: attempt to read past end of buffer\n", mode);
714 return AVERROR_INVALIDDATA;
715 }
716
717 return data_ptr - data_start; /* report number of bytes consumed from the input buffer */
718 }
719
720
721 /* Binary tree codes. */
722 enum {
723 H_SPLIT = 0,
724 V_SPLIT = 1,
725 INTRA_NULL = 2,
726 INTER_DATA = 3
727 };
728
729
730 #define SPLIT_CELL(size, new_size) (new_size) = ((size) > 2) ? ((((size) + 2) >> 2) << 1) : 1
731
732 #define UPDATE_BITPOS(n) \
733 ctx->skip_bits += (n); \
734 ctx->need_resync = 1
735
736 #define RESYNC_BITSTREAM \
737 if (ctx->need_resync && !(get_bits_count(&ctx->gb) & 7)) { \
738 skip_bits_long(&ctx->gb, ctx->skip_bits); \
739 ctx->skip_bits = 0; \
740 ctx->need_resync = 0; \
741 }
742
743 #define CHECK_CELL \
744 if (curr_cell.xpos + curr_cell.width > (plane->width >> 2) || \
745 curr_cell.ypos + curr_cell.height > (plane->height >> 2)) { \
746 av_log(avctx, AV_LOG_ERROR, "Invalid cell: x=%d, y=%d, w=%d, h=%d\n", \
747 curr_cell.xpos, curr_cell.ypos, curr_cell.width, curr_cell.height); \
748 return AVERROR_INVALIDDATA; \
749 }
750
751
parse_bintree(Indeo3DecodeContext * ctx,AVCodecContext * avctx,Plane * plane,int code,Cell * ref_cell,const int depth,const int strip_width)752 static int parse_bintree(Indeo3DecodeContext *ctx, AVCodecContext *avctx,
753 Plane *plane, int code, Cell *ref_cell,
754 const int depth, const int strip_width)
755 {
756 Cell curr_cell;
757 int bytes_used, ret;
758
759 if (depth <= 0) {
760 av_log(avctx, AV_LOG_ERROR, "Stack overflow (corrupted binary tree)!\n");
761 return AVERROR_INVALIDDATA; // unwind recursion
762 }
763
764 curr_cell = *ref_cell; // clone parent cell
765 if (code == H_SPLIT) {
766 SPLIT_CELL(ref_cell->height, curr_cell.height);
767 ref_cell->ypos += curr_cell.height;
768 ref_cell->height -= curr_cell.height;
769 if (ref_cell->height <= 0 || curr_cell.height <= 0)
770 return AVERROR_INVALIDDATA;
771 } else if (code == V_SPLIT) {
772 if (curr_cell.width > strip_width) {
773 /* split strip */
774 curr_cell.width = (curr_cell.width <= (strip_width << 1) ? 1 : 2) * strip_width;
775 } else
776 SPLIT_CELL(ref_cell->width, curr_cell.width);
777 ref_cell->xpos += curr_cell.width;
778 ref_cell->width -= curr_cell.width;
779 if (ref_cell->width <= 0 || curr_cell.width <= 0)
780 return AVERROR_INVALIDDATA;
781 }
782
783 while (get_bits_left(&ctx->gb) >= 2) { /* loop until return */
784 RESYNC_BITSTREAM;
785 switch (code = get_bits(&ctx->gb, 2)) {
786 case H_SPLIT:
787 case V_SPLIT:
788 if (parse_bintree(ctx, avctx, plane, code, &curr_cell, depth - 1, strip_width))
789 return AVERROR_INVALIDDATA;
790 break;
791 case INTRA_NULL:
792 if (!curr_cell.tree) { /* MC tree INTRA code */
793 curr_cell.mv_ptr = 0; /* mark the current strip as INTRA */
794 curr_cell.tree = 1; /* enter the VQ tree */
795 } else { /* VQ tree NULL code */
796 RESYNC_BITSTREAM;
797 code = get_bits(&ctx->gb, 2);
798 if (code >= 2) {
799 av_log(avctx, AV_LOG_ERROR, "Invalid VQ_NULL code: %d\n", code);
800 return AVERROR_INVALIDDATA;
801 }
802 if (code == 1)
803 av_log(avctx, AV_LOG_ERROR, "SkipCell procedure not implemented yet!\n");
804
805 CHECK_CELL
806 if (!curr_cell.mv_ptr)
807 return AVERROR_INVALIDDATA;
808
809 ret = copy_cell(ctx, plane, &curr_cell);
810 return ret;
811 }
812 break;
813 case INTER_DATA:
814 if (!curr_cell.tree) { /* MC tree INTER code */
815 unsigned mv_idx;
816 /* get motion vector index and setup the pointer to the mv set */
817 if (!ctx->need_resync)
818 ctx->next_cell_data = &ctx->gb.buffer[(get_bits_count(&ctx->gb) + 7) >> 3];
819 if (ctx->next_cell_data >= ctx->last_byte) {
820 av_log(avctx, AV_LOG_ERROR, "motion vector out of array\n");
821 return AVERROR_INVALIDDATA;
822 }
823 mv_idx = *(ctx->next_cell_data++);
824 if (mv_idx >= ctx->num_vectors) {
825 av_log(avctx, AV_LOG_ERROR, "motion vector index out of range\n");
826 return AVERROR_INVALIDDATA;
827 }
828 curr_cell.mv_ptr = &ctx->mc_vectors[mv_idx << 1];
829 curr_cell.tree = 1; /* enter the VQ tree */
830 UPDATE_BITPOS(8);
831 } else { /* VQ tree DATA code */
832 if (!ctx->need_resync)
833 ctx->next_cell_data = &ctx->gb.buffer[(get_bits_count(&ctx->gb) + 7) >> 3];
834
835 CHECK_CELL
836 bytes_used = decode_cell(ctx, avctx, plane, &curr_cell,
837 ctx->next_cell_data, ctx->last_byte);
838 if (bytes_used < 0)
839 return AVERROR_INVALIDDATA;
840
841 UPDATE_BITPOS(bytes_used << 3);
842 ctx->next_cell_data += bytes_used;
843 return 0;
844 }
845 break;
846 }
847 }//while
848
849 return AVERROR_INVALIDDATA;
850 }
851
852
decode_plane(Indeo3DecodeContext * ctx,AVCodecContext * avctx,Plane * plane,const uint8_t * data,int32_t data_size,int32_t strip_width)853 static int decode_plane(Indeo3DecodeContext *ctx, AVCodecContext *avctx,
854 Plane *plane, const uint8_t *data, int32_t data_size,
855 int32_t strip_width)
856 {
857 Cell curr_cell;
858 unsigned num_vectors;
859
860 /* each plane data starts with mc_vector_count field, */
861 /* an optional array of motion vectors followed by the vq data */
862 num_vectors = bytestream_get_le32(&data); data_size -= 4;
863 if (num_vectors > 256) {
864 av_log(ctx->avctx, AV_LOG_ERROR,
865 "Read invalid number of motion vectors %d\n", num_vectors);
866 return AVERROR_INVALIDDATA;
867 }
868 if (num_vectors * 2 > data_size)
869 return AVERROR_INVALIDDATA;
870
871 ctx->num_vectors = num_vectors;
872 ctx->mc_vectors = num_vectors ? data : 0;
873
874 /* init the bitreader */
875 init_get_bits(&ctx->gb, &data[num_vectors * 2], (data_size - num_vectors * 2) << 3);
876 ctx->skip_bits = 0;
877 ctx->need_resync = 0;
878
879 ctx->last_byte = data + data_size;
880
881 /* initialize the 1st cell and set its dimensions to whole plane */
882 curr_cell.xpos = curr_cell.ypos = 0;
883 curr_cell.width = plane->width >> 2;
884 curr_cell.height = plane->height >> 2;
885 curr_cell.tree = 0; // we are in the MC tree now
886 curr_cell.mv_ptr = 0; // no motion vector = INTRA cell
887
888 return parse_bintree(ctx, avctx, plane, INTRA_NULL, &curr_cell, CELL_STACK_MAX, strip_width);
889 }
890
891
892 #define OS_HDR_ID MKBETAG('F', 'R', 'M', 'H')
893
decode_frame_headers(Indeo3DecodeContext * ctx,AVCodecContext * avctx,const uint8_t * buf,int buf_size)894 static int decode_frame_headers(Indeo3DecodeContext *ctx, AVCodecContext *avctx,
895 const uint8_t *buf, int buf_size)
896 {
897 GetByteContext gb;
898 const uint8_t *bs_hdr;
899 uint32_t frame_num, word2, check_sum, data_size;
900 int y_offset, u_offset, v_offset;
901 uint32_t starts[3], ends[3];
902 uint16_t height, width;
903 int i, j;
904
905 bytestream2_init(&gb, buf, buf_size);
906
907 /* parse and check the OS header */
908 frame_num = bytestream2_get_le32(&gb);
909 word2 = bytestream2_get_le32(&gb);
910 check_sum = bytestream2_get_le32(&gb);
911 data_size = bytestream2_get_le32(&gb);
912
913 if ((frame_num ^ word2 ^ data_size ^ OS_HDR_ID) != check_sum) {
914 av_log(avctx, AV_LOG_ERROR, "OS header checksum mismatch!\n");
915 return AVERROR_INVALIDDATA;
916 }
917
918 /* parse the bitstream header */
919 bs_hdr = gb.buffer;
920
921 if (bytestream2_get_le16(&gb) != 32) {
922 av_log(avctx, AV_LOG_ERROR, "Unsupported codec version!\n");
923 return AVERROR_INVALIDDATA;
924 }
925
926 ctx->frame_num = frame_num;
927 ctx->frame_flags = bytestream2_get_le16(&gb);
928 ctx->data_size = (bytestream2_get_le32(&gb) + 7) >> 3;
929 ctx->cb_offset = bytestream2_get_byte(&gb);
930
931 if (ctx->data_size == 16)
932 return 4;
933 ctx->data_size = FFMIN(ctx->data_size, buf_size - 16);
934
935 bytestream2_skip(&gb, 3); // skip reserved byte and checksum
936
937 /* check frame dimensions */
938 height = bytestream2_get_le16(&gb);
939 width = bytestream2_get_le16(&gb);
940 if (av_image_check_size(width, height, 0, avctx))
941 return AVERROR_INVALIDDATA;
942
943 if (width != ctx->width || height != ctx->height) {
944 int res;
945
946 ff_dlog(avctx, "Frame dimensions changed!\n");
947
948 if (width < 16 || width > 640 ||
949 height < 16 || height > 480 ||
950 width & 3 || height & 3) {
951 av_log(avctx, AV_LOG_ERROR,
952 "Invalid picture dimensions: %d x %d!\n", width, height);
953 return AVERROR_INVALIDDATA;
954 }
955 free_frame_buffers(ctx);
956 if ((res = allocate_frame_buffers(ctx, avctx, width, height)) < 0)
957 return res;
958 if ((res = ff_set_dimensions(avctx, width, height)) < 0)
959 return res;
960 }
961
962 y_offset = bytestream2_get_le32(&gb);
963 v_offset = bytestream2_get_le32(&gb);
964 u_offset = bytestream2_get_le32(&gb);
965 bytestream2_skip(&gb, 4);
966
967 /* unfortunately there is no common order of planes in the buffer */
968 /* so we use that sorting algo for determining planes data sizes */
969 starts[0] = y_offset;
970 starts[1] = v_offset;
971 starts[2] = u_offset;
972
973 for (j = 0; j < 3; j++) {
974 ends[j] = ctx->data_size;
975 for (i = 2; i >= 0; i--)
976 if (starts[i] < ends[j] && starts[i] > starts[j])
977 ends[j] = starts[i];
978 }
979
980 ctx->y_data_size = ends[0] - starts[0];
981 ctx->v_data_size = ends[1] - starts[1];
982 ctx->u_data_size = ends[2] - starts[2];
983 if (FFMIN3(y_offset, v_offset, u_offset) < 0 ||
984 FFMAX3(y_offset, v_offset, u_offset) >= ctx->data_size - 16 ||
985 FFMIN3(y_offset, v_offset, u_offset) < gb.buffer - bs_hdr + 16 ||
986 FFMIN3(ctx->y_data_size, ctx->v_data_size, ctx->u_data_size) <= 0) {
987 av_log(avctx, AV_LOG_ERROR, "One of the y/u/v offsets is invalid\n");
988 return AVERROR_INVALIDDATA;
989 }
990
991 ctx->y_data_ptr = bs_hdr + y_offset;
992 ctx->v_data_ptr = bs_hdr + v_offset;
993 ctx->u_data_ptr = bs_hdr + u_offset;
994 ctx->alt_quant = gb.buffer;
995
996 if (ctx->data_size == 16) {
997 av_log(avctx, AV_LOG_DEBUG, "Sync frame encountered!\n");
998 return 16;
999 }
1000
1001 if (ctx->frame_flags & BS_8BIT_PEL) {
1002 avpriv_request_sample(avctx, "8-bit pixel format");
1003 return AVERROR_PATCHWELCOME;
1004 }
1005
1006 if (ctx->frame_flags & BS_MV_X_HALF || ctx->frame_flags & BS_MV_Y_HALF) {
1007 avpriv_request_sample(avctx, "Halfpel motion vectors");
1008 return AVERROR_PATCHWELCOME;
1009 }
1010
1011 return 0;
1012 }
1013
1014
1015 /**
1016 * Convert and output the current plane.
1017 * All pixel values will be upsampled by shifting right by one bit.
1018 *
1019 * @param[in] plane pointer to the descriptor of the plane being processed
1020 * @param[in] buf_sel indicates which frame buffer the input data stored in
1021 * @param[out] dst pointer to the buffer receiving converted pixels
1022 * @param[in] dst_pitch pitch for moving to the next y line
1023 * @param[in] dst_height output plane height
1024 */
output_plane(const Plane * plane,int buf_sel,uint8_t * dst,ptrdiff_t dst_pitch,int dst_height)1025 static void output_plane(const Plane *plane, int buf_sel, uint8_t *dst,
1026 ptrdiff_t dst_pitch, int dst_height)
1027 {
1028 int x,y;
1029 const uint8_t *src = plane->pixels[buf_sel];
1030 ptrdiff_t pitch = plane->pitch;
1031
1032 dst_height = FFMIN(dst_height, plane->height);
1033 for (y = 0; y < dst_height; y++) {
1034 /* convert four pixels at once using SWAR */
1035 for (x = 0; x < plane->width >> 2; x++) {
1036 AV_WN32A(dst, (AV_RN32A(src) & 0x7F7F7F7F) << 1);
1037 src += 4;
1038 dst += 4;
1039 }
1040
1041 for (x <<= 2; x < plane->width; x++)
1042 *dst++ = *src++ << 1;
1043
1044 src += pitch - plane->width;
1045 dst += dst_pitch - plane->width;
1046 }
1047 }
1048
1049
decode_init(AVCodecContext * avctx)1050 static av_cold int decode_init(AVCodecContext *avctx)
1051 {
1052 Indeo3DecodeContext *ctx = avctx->priv_data;
1053
1054 ctx->avctx = avctx;
1055 avctx->pix_fmt = AV_PIX_FMT_YUV410P;
1056
1057 build_requant_tab();
1058
1059 ff_hpeldsp_init(&ctx->hdsp, avctx->flags);
1060
1061 return allocate_frame_buffers(ctx, avctx, avctx->width, avctx->height);
1062 }
1063
1064
decode_frame(AVCodecContext * avctx,void * data,int * got_frame,AVPacket * avpkt)1065 static int decode_frame(AVCodecContext *avctx, void *data, int *got_frame,
1066 AVPacket *avpkt)
1067 {
1068 Indeo3DecodeContext *ctx = avctx->priv_data;
1069 const uint8_t *buf = avpkt->data;
1070 int buf_size = avpkt->size;
1071 AVFrame *frame = data;
1072 int res;
1073
1074 res = decode_frame_headers(ctx, avctx, buf, buf_size);
1075 if (res < 0)
1076 return res;
1077
1078 /* skip sync(null) frames */
1079 if (res) {
1080 // we have processed 16 bytes but no data was decoded
1081 *got_frame = 0;
1082 return buf_size;
1083 }
1084
1085 /* skip droppable INTER frames if requested */
1086 if (ctx->frame_flags & BS_NONREF &&
1087 (avctx->skip_frame >= AVDISCARD_NONREF))
1088 return 0;
1089
1090 /* skip INTER frames if requested */
1091 if (!(ctx->frame_flags & BS_KEYFRAME) && avctx->skip_frame >= AVDISCARD_NONKEY)
1092 return 0;
1093
1094 /* use BS_BUFFER flag for buffer switching */
1095 ctx->buf_sel = (ctx->frame_flags >> BS_BUFFER) & 1;
1096
1097 if ((res = ff_get_buffer(avctx, frame, 0)) < 0)
1098 return res;
1099
1100 /* decode luma plane */
1101 if ((res = decode_plane(ctx, avctx, ctx->planes, ctx->y_data_ptr, ctx->y_data_size, 40)))
1102 return res;
1103
1104 /* decode chroma planes */
1105 if ((res = decode_plane(ctx, avctx, &ctx->planes[1], ctx->u_data_ptr, ctx->u_data_size, 10)))
1106 return res;
1107
1108 if ((res = decode_plane(ctx, avctx, &ctx->planes[2], ctx->v_data_ptr, ctx->v_data_size, 10)))
1109 return res;
1110
1111 output_plane(&ctx->planes[0], ctx->buf_sel,
1112 frame->data[0], frame->linesize[0],
1113 avctx->height);
1114 output_plane(&ctx->planes[1], ctx->buf_sel,
1115 frame->data[1], frame->linesize[1],
1116 (avctx->height + 3) >> 2);
1117 output_plane(&ctx->planes[2], ctx->buf_sel,
1118 frame->data[2], frame->linesize[2],
1119 (avctx->height + 3) >> 2);
1120
1121 *got_frame = 1;
1122
1123 return buf_size;
1124 }
1125
1126
decode_close(AVCodecContext * avctx)1127 static av_cold int decode_close(AVCodecContext *avctx)
1128 {
1129 free_frame_buffers(avctx->priv_data);
1130
1131 return 0;
1132 }
1133
1134 AVCodec ff_indeo3_decoder = {
1135 .name = "indeo3",
1136 .long_name = NULL_IF_CONFIG_SMALL("Intel Indeo 3"),
1137 .type = AVMEDIA_TYPE_VIDEO,
1138 .id = AV_CODEC_ID_INDEO3,
1139 .priv_data_size = sizeof(Indeo3DecodeContext),
1140 .init = decode_init,
1141 .close = decode_close,
1142 .decode = decode_frame,
1143 .capabilities = AV_CODEC_CAP_DR1,
1144 .caps_internal = FF_CODEC_CAP_INIT_CLEANUP,
1145 };
1146