Imported Debian version 2.5.3~trusty1
[deb_ffmpeg.git] / ffmpeg / libavcodec / proresdec2.c
1 /*
2 * Copyright (c) 2010-2011 Maxim Poliakovski
3 * Copyright (c) 2010-2011 Elvis Presley
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 * Known FOURCCs: 'apch' (HQ), 'apcn' (SD), 'apcs' (LT), 'acpo' (Proxy), 'ap4h' (4444)
25 */
26
27 //#define DEBUG
28
29 #define LONG_BITSTREAM_READER
30
31 #include "avcodec.h"
32 #include "get_bits.h"
33 #include "idctdsp.h"
34 #include "internal.h"
35 #include "simple_idct.h"
36 #include "proresdec.h"
37 #include "proresdata.h"
38
39 static void permute(uint8_t *dst, const uint8_t *src, const uint8_t permutation[64])
40 {
41 int i;
42 for (i = 0; i < 64; i++)
43 dst[i] = permutation[src[i]];
44 }
45
46 static av_cold int decode_init(AVCodecContext *avctx)
47 {
48 ProresContext *ctx = avctx->priv_data;
49 uint8_t idct_permutation[64];
50
51 avctx->bits_per_raw_sample = 10;
52
53 ff_blockdsp_init(&ctx->bdsp, avctx);
54 ff_proresdsp_init(&ctx->prodsp, avctx);
55
56 ff_init_scantable_permutation(idct_permutation,
57 ctx->prodsp.idct_permutation_type);
58
59 permute(ctx->progressive_scan, ff_prores_progressive_scan, idct_permutation);
60 permute(ctx->interlaced_scan, ff_prores_interlaced_scan, idct_permutation);
61
62 return 0;
63 }
64
65 static int decode_frame_header(ProresContext *ctx, const uint8_t *buf,
66 const int data_size, AVCodecContext *avctx)
67 {
68 int hdr_size, width, height, flags;
69 int version;
70 const uint8_t *ptr;
71
72 hdr_size = AV_RB16(buf);
73 av_dlog(avctx, "header size %d\n", hdr_size);
74 if (hdr_size > data_size) {
75 av_log(avctx, AV_LOG_ERROR, "error, wrong header size\n");
76 return AVERROR_INVALIDDATA;
77 }
78
79 version = AV_RB16(buf + 2);
80 av_dlog(avctx, "%.4s version %d\n", buf+4, version);
81 if (version > 1) {
82 av_log(avctx, AV_LOG_ERROR, "unsupported version: %d\n", version);
83 return AVERROR_PATCHWELCOME;
84 }
85
86 width = AV_RB16(buf + 8);
87 height = AV_RB16(buf + 10);
88 if (width != avctx->width || height != avctx->height) {
89 av_log(avctx, AV_LOG_ERROR, "picture resolution change: %dx%d -> %dx%d\n",
90 avctx->width, avctx->height, width, height);
91 return AVERROR_PATCHWELCOME;
92 }
93
94 ctx->frame_type = (buf[12] >> 2) & 3;
95 ctx->alpha_info = buf[17] & 0xf;
96
97 if (ctx->alpha_info > 2) {
98 av_log(avctx, AV_LOG_ERROR, "Invalid alpha mode %d\n", ctx->alpha_info);
99 return AVERROR_INVALIDDATA;
100 }
101 if (avctx->skip_alpha) ctx->alpha_info = 0;
102
103 av_dlog(avctx, "frame type %d\n", ctx->frame_type);
104
105 if (ctx->frame_type == 0) {
106 ctx->scan = ctx->progressive_scan; // permuted
107 } else {
108 ctx->scan = ctx->interlaced_scan; // permuted
109 ctx->frame->interlaced_frame = 1;
110 ctx->frame->top_field_first = ctx->frame_type == 1;
111 }
112
113 if (ctx->alpha_info) {
114 avctx->pix_fmt = (buf[12] & 0xC0) == 0xC0 ? AV_PIX_FMT_YUVA444P10 : AV_PIX_FMT_YUVA422P10;
115 } else {
116 avctx->pix_fmt = (buf[12] & 0xC0) == 0xC0 ? AV_PIX_FMT_YUV444P10 : AV_PIX_FMT_YUV422P10;
117 }
118
119 ptr = buf + 20;
120 flags = buf[19];
121 av_dlog(avctx, "flags %x\n", flags);
122
123 if (flags & 2) {
124 if(buf + data_size - ptr < 64) {
125 av_log(avctx, AV_LOG_ERROR, "Header truncated\n");
126 return AVERROR_INVALIDDATA;
127 }
128 permute(ctx->qmat_luma, ctx->prodsp.idct_permutation, ptr);
129 ptr += 64;
130 } else {
131 memset(ctx->qmat_luma, 4, 64);
132 }
133
134 if (flags & 1) {
135 if(buf + data_size - ptr < 64) {
136 av_log(avctx, AV_LOG_ERROR, "Header truncated\n");
137 return AVERROR_INVALIDDATA;
138 }
139 permute(ctx->qmat_chroma, ctx->prodsp.idct_permutation, ptr);
140 } else {
141 memset(ctx->qmat_chroma, 4, 64);
142 }
143
144 return hdr_size;
145 }
146
147 static int decode_picture_header(AVCodecContext *avctx, const uint8_t *buf, const int buf_size)
148 {
149 ProresContext *ctx = avctx->priv_data;
150 int i, hdr_size, slice_count;
151 unsigned pic_data_size;
152 int log2_slice_mb_width, log2_slice_mb_height;
153 int slice_mb_count, mb_x, mb_y;
154 const uint8_t *data_ptr, *index_ptr;
155
156 hdr_size = buf[0] >> 3;
157 if (hdr_size < 8 || hdr_size > buf_size) {
158 av_log(avctx, AV_LOG_ERROR, "error, wrong picture header size\n");
159 return AVERROR_INVALIDDATA;
160 }
161
162 pic_data_size = AV_RB32(buf + 1);
163 if (pic_data_size > buf_size) {
164 av_log(avctx, AV_LOG_ERROR, "error, wrong picture data size\n");
165 return AVERROR_INVALIDDATA;
166 }
167
168 log2_slice_mb_width = buf[7] >> 4;
169 log2_slice_mb_height = buf[7] & 0xF;
170 if (log2_slice_mb_width > 3 || log2_slice_mb_height) {
171 av_log(avctx, AV_LOG_ERROR, "unsupported slice resolution: %dx%d\n",
172 1 << log2_slice_mb_width, 1 << log2_slice_mb_height);
173 return AVERROR_INVALIDDATA;
174 }
175
176 ctx->mb_width = (avctx->width + 15) >> 4;
177 if (ctx->frame_type)
178 ctx->mb_height = (avctx->height + 31) >> 5;
179 else
180 ctx->mb_height = (avctx->height + 15) >> 4;
181
182 slice_count = AV_RB16(buf + 5);
183
184 if (ctx->slice_count != slice_count || !ctx->slices) {
185 av_freep(&ctx->slices);
186 ctx->slices = av_mallocz_array(slice_count, sizeof(*ctx->slices));
187 if (!ctx->slices)
188 return AVERROR(ENOMEM);
189 ctx->slice_count = slice_count;
190 }
191
192 if (!slice_count)
193 return AVERROR(EINVAL);
194
195 if (hdr_size + slice_count*2 > buf_size) {
196 av_log(avctx, AV_LOG_ERROR, "error, wrong slice count\n");
197 return AVERROR_INVALIDDATA;
198 }
199
200 // parse slice information
201 index_ptr = buf + hdr_size;
202 data_ptr = index_ptr + slice_count*2;
203
204 slice_mb_count = 1 << log2_slice_mb_width;
205 mb_x = 0;
206 mb_y = 0;
207
208 for (i = 0; i < slice_count; i++) {
209 SliceContext *slice = &ctx->slices[i];
210
211 slice->data = data_ptr;
212 data_ptr += AV_RB16(index_ptr + i*2);
213
214 while (ctx->mb_width - mb_x < slice_mb_count)
215 slice_mb_count >>= 1;
216
217 slice->mb_x = mb_x;
218 slice->mb_y = mb_y;
219 slice->mb_count = slice_mb_count;
220 slice->data_size = data_ptr - slice->data;
221
222 if (slice->data_size < 6) {
223 av_log(avctx, AV_LOG_ERROR, "error, wrong slice data size\n");
224 return AVERROR_INVALIDDATA;
225 }
226
227 mb_x += slice_mb_count;
228 if (mb_x == ctx->mb_width) {
229 slice_mb_count = 1 << log2_slice_mb_width;
230 mb_x = 0;
231 mb_y++;
232 }
233 if (data_ptr > buf + buf_size) {
234 av_log(avctx, AV_LOG_ERROR, "error, slice out of bounds\n");
235 return AVERROR_INVALIDDATA;
236 }
237 }
238
239 if (mb_x || mb_y != ctx->mb_height) {
240 av_log(avctx, AV_LOG_ERROR, "error wrong mb count y %d h %d\n",
241 mb_y, ctx->mb_height);
242 return AVERROR_INVALIDDATA;
243 }
244
245 return pic_data_size;
246 }
247
248 #define DECODE_CODEWORD(val, codebook) \
249 do { \
250 unsigned int rice_order, exp_order, switch_bits; \
251 unsigned int q, buf, bits; \
252 \
253 UPDATE_CACHE(re, gb); \
254 buf = GET_CACHE(re, gb); \
255 \
256 /* number of bits to switch between rice and exp golomb */ \
257 switch_bits = codebook & 3; \
258 rice_order = codebook >> 5; \
259 exp_order = (codebook >> 2) & 7; \
260 \
261 q = 31 - av_log2(buf); \
262 \
263 if (q > switch_bits) { /* exp golomb */ \
264 bits = exp_order - switch_bits + (q<<1); \
265 val = SHOW_UBITS(re, gb, bits) - (1 << exp_order) + \
266 ((switch_bits + 1) << rice_order); \
267 SKIP_BITS(re, gb, bits); \
268 } else if (rice_order) { \
269 SKIP_BITS(re, gb, q+1); \
270 val = (q << rice_order) + SHOW_UBITS(re, gb, rice_order); \
271 SKIP_BITS(re, gb, rice_order); \
272 } else { \
273 val = q; \
274 SKIP_BITS(re, gb, q+1); \
275 } \
276 } while (0)
277
278 #define TOSIGNED(x) (((x) >> 1) ^ (-((x) & 1)))
279
280 #define FIRST_DC_CB 0xB8
281
282 static const uint8_t dc_codebook[7] = { 0x04, 0x28, 0x28, 0x4D, 0x4D, 0x70, 0x70};
283
284 static av_always_inline void decode_dc_coeffs(GetBitContext *gb, int16_t *out,
285 int blocks_per_slice)
286 {
287 int16_t prev_dc;
288 int code, i, sign;
289
290 OPEN_READER(re, gb);
291
292 DECODE_CODEWORD(code, FIRST_DC_CB);
293 prev_dc = TOSIGNED(code);
294 out[0] = prev_dc;
295
296 out += 64; // dc coeff for the next block
297
298 code = 5;
299 sign = 0;
300 for (i = 1; i < blocks_per_slice; i++, out += 64) {
301 DECODE_CODEWORD(code, dc_codebook[FFMIN(code, 6U)]);
302 if(code) sign ^= -(code & 1);
303 else sign = 0;
304 prev_dc += (((code + 1) >> 1) ^ sign) - sign;
305 out[0] = prev_dc;
306 }
307 CLOSE_READER(re, gb);
308 }
309
310 // adaptive codebook switching lut according to previous run/level values
311 static const uint8_t run_to_cb[16] = { 0x06, 0x06, 0x05, 0x05, 0x04, 0x29, 0x29, 0x29, 0x29, 0x28, 0x28, 0x28, 0x28, 0x28, 0x28, 0x4C };
312 static const uint8_t lev_to_cb[10] = { 0x04, 0x0A, 0x05, 0x06, 0x04, 0x28, 0x28, 0x28, 0x28, 0x4C };
313
314 static av_always_inline int decode_ac_coeffs(AVCodecContext *avctx, GetBitContext *gb,
315 int16_t *out, int blocks_per_slice)
316 {
317 ProresContext *ctx = avctx->priv_data;
318 int block_mask, sign;
319 unsigned pos, run, level;
320 int max_coeffs, i, bits_left;
321 int log2_block_count = av_log2(blocks_per_slice);
322
323 OPEN_READER(re, gb);
324 UPDATE_CACHE(re, gb); \
325 run = 4;
326 level = 2;
327
328 max_coeffs = 64 << log2_block_count;
329 block_mask = blocks_per_slice - 1;
330
331 for (pos = block_mask;;) {
332 bits_left = gb->size_in_bits - re_index;
333 if (!bits_left || (bits_left < 32 && !SHOW_UBITS(re, gb, bits_left)))
334 break;
335
336 DECODE_CODEWORD(run, run_to_cb[FFMIN(run, 15)]);
337 pos += run + 1;
338 if (pos >= max_coeffs) {
339 av_log(avctx, AV_LOG_ERROR, "ac tex damaged %d, %d\n", pos, max_coeffs);
340 return AVERROR_INVALIDDATA;
341 }
342
343 DECODE_CODEWORD(level, lev_to_cb[FFMIN(level, 9)]);
344 level += 1;
345
346 i = pos >> log2_block_count;
347
348 sign = SHOW_SBITS(re, gb, 1);
349 SKIP_BITS(re, gb, 1);
350 out[((pos & block_mask) << 6) + ctx->scan[i]] = ((level ^ sign) - sign);
351 }
352
353 CLOSE_READER(re, gb);
354 return 0;
355 }
356
357 static int decode_slice_luma(AVCodecContext *avctx, SliceContext *slice,
358 uint16_t *dst, int dst_stride,
359 const uint8_t *buf, unsigned buf_size,
360 const int16_t *qmat)
361 {
362 ProresContext *ctx = avctx->priv_data;
363 LOCAL_ALIGNED_16(int16_t, blocks, [8*4*64]);
364 int16_t *block;
365 GetBitContext gb;
366 int i, blocks_per_slice = slice->mb_count<<2;
367 int ret;
368
369 for (i = 0; i < blocks_per_slice; i++)
370 ctx->bdsp.clear_block(blocks+(i<<6));
371
372 init_get_bits(&gb, buf, buf_size << 3);
373
374 decode_dc_coeffs(&gb, blocks, blocks_per_slice);
375 if ((ret = decode_ac_coeffs(avctx, &gb, blocks, blocks_per_slice)) < 0)
376 return ret;
377
378 block = blocks;
379 for (i = 0; i < slice->mb_count; i++) {
380 ctx->prodsp.idct_put(dst, dst_stride, block+(0<<6), qmat);
381 ctx->prodsp.idct_put(dst +8, dst_stride, block+(1<<6), qmat);
382 ctx->prodsp.idct_put(dst+4*dst_stride , dst_stride, block+(2<<6), qmat);
383 ctx->prodsp.idct_put(dst+4*dst_stride+8, dst_stride, block+(3<<6), qmat);
384 block += 4*64;
385 dst += 16;
386 }
387 return 0;
388 }
389
390 static int decode_slice_chroma(AVCodecContext *avctx, SliceContext *slice,
391 uint16_t *dst, int dst_stride,
392 const uint8_t *buf, unsigned buf_size,
393 const int16_t *qmat, int log2_blocks_per_mb)
394 {
395 ProresContext *ctx = avctx->priv_data;
396 LOCAL_ALIGNED_16(int16_t, blocks, [8*4*64]);
397 int16_t *block;
398 GetBitContext gb;
399 int i, j, blocks_per_slice = slice->mb_count << log2_blocks_per_mb;
400 int ret;
401
402 for (i = 0; i < blocks_per_slice; i++)
403 ctx->bdsp.clear_block(blocks+(i<<6));
404
405 init_get_bits(&gb, buf, buf_size << 3);
406
407 decode_dc_coeffs(&gb, blocks, blocks_per_slice);
408 if ((ret = decode_ac_coeffs(avctx, &gb, blocks, blocks_per_slice)) < 0)
409 return ret;
410
411 block = blocks;
412 for (i = 0; i < slice->mb_count; i++) {
413 for (j = 0; j < log2_blocks_per_mb; j++) {
414 ctx->prodsp.idct_put(dst, dst_stride, block+(0<<6), qmat);
415 ctx->prodsp.idct_put(dst+4*dst_stride, dst_stride, block+(1<<6), qmat);
416 block += 2*64;
417 dst += 8;
418 }
419 }
420 return 0;
421 }
422
423 static void unpack_alpha(GetBitContext *gb, uint16_t *dst, int num_coeffs,
424 const int num_bits)
425 {
426 const int mask = (1 << num_bits) - 1;
427 int i, idx, val, alpha_val;
428
429 idx = 0;
430 alpha_val = mask;
431 do {
432 do {
433 if (get_bits1(gb)) {
434 val = get_bits(gb, num_bits);
435 } else {
436 int sign;
437 val = get_bits(gb, num_bits == 16 ? 7 : 4);
438 sign = val & 1;
439 val = (val + 2) >> 1;
440 if (sign)
441 val = -val;
442 }
443 alpha_val = (alpha_val + val) & mask;
444 if (num_bits == 16) {
445 dst[idx++] = alpha_val >> 6;
446 } else {
447 dst[idx++] = (alpha_val << 2) | (alpha_val >> 6);
448 }
449 if (idx >= num_coeffs)
450 break;
451 } while (get_bits_left(gb)>0 && get_bits1(gb));
452 val = get_bits(gb, 4);
453 if (!val)
454 val = get_bits(gb, 11);
455 if (idx + val > num_coeffs)
456 val = num_coeffs - idx;
457 if (num_bits == 16) {
458 for (i = 0; i < val; i++)
459 dst[idx++] = alpha_val >> 6;
460 } else {
461 for (i = 0; i < val; i++)
462 dst[idx++] = (alpha_val << 2) | (alpha_val >> 6);
463
464 }
465 } while (idx < num_coeffs);
466 }
467
468 /**
469 * Decode alpha slice plane.
470 */
471 static void decode_slice_alpha(ProresContext *ctx,
472 uint16_t *dst, int dst_stride,
473 const uint8_t *buf, int buf_size,
474 int blocks_per_slice)
475 {
476 GetBitContext gb;
477 int i;
478 LOCAL_ALIGNED_16(int16_t, blocks, [8*4*64]);
479 int16_t *block;
480
481 for (i = 0; i < blocks_per_slice<<2; i++)
482 ctx->bdsp.clear_block(blocks+(i<<6));
483
484 init_get_bits(&gb, buf, buf_size << 3);
485
486 if (ctx->alpha_info == 2) {
487 unpack_alpha(&gb, blocks, blocks_per_slice * 4 * 64, 16);
488 } else {
489 unpack_alpha(&gb, blocks, blocks_per_slice * 4 * 64, 8);
490 }
491
492 block = blocks;
493 for (i = 0; i < 16; i++) {
494 memcpy(dst, block, 16 * blocks_per_slice * sizeof(*dst));
495 dst += dst_stride >> 1;
496 block += 16 * blocks_per_slice;
497 }
498 }
499
500 static int decode_slice_thread(AVCodecContext *avctx, void *arg, int jobnr, int threadnr)
501 {
502 ProresContext *ctx = avctx->priv_data;
503 SliceContext *slice = &ctx->slices[jobnr];
504 const uint8_t *buf = slice->data;
505 AVFrame *pic = ctx->frame;
506 int i, hdr_size, qscale, log2_chroma_blocks_per_mb;
507 int luma_stride, chroma_stride;
508 int y_data_size, u_data_size, v_data_size, a_data_size;
509 uint8_t *dest_y, *dest_u, *dest_v, *dest_a;
510 int16_t qmat_luma_scaled[64];
511 int16_t qmat_chroma_scaled[64];
512 int mb_x_shift;
513 int ret;
514
515 slice->ret = -1;
516 //av_log(avctx, AV_LOG_INFO, "slice %d mb width %d mb x %d y %d\n",
517 // jobnr, slice->mb_count, slice->mb_x, slice->mb_y);
518
519 // slice header
520 hdr_size = buf[0] >> 3;
521 qscale = av_clip(buf[1], 1, 224);
522 qscale = qscale > 128 ? qscale - 96 << 2: qscale;
523 y_data_size = AV_RB16(buf + 2);
524 u_data_size = AV_RB16(buf + 4);
525 v_data_size = slice->data_size - y_data_size - u_data_size - hdr_size;
526 if (hdr_size > 7) v_data_size = AV_RB16(buf + 6);
527 a_data_size = slice->data_size - y_data_size - u_data_size -
528 v_data_size - hdr_size;
529
530 if (y_data_size < 0 || u_data_size < 0 || v_data_size < 0
531 || hdr_size+y_data_size+u_data_size+v_data_size > slice->data_size){
532 av_log(avctx, AV_LOG_ERROR, "invalid plane data size\n");
533 return AVERROR_INVALIDDATA;
534 }
535
536 buf += hdr_size;
537
538 for (i = 0; i < 64; i++) {
539 qmat_luma_scaled [i] = ctx->qmat_luma [i] * qscale;
540 qmat_chroma_scaled[i] = ctx->qmat_chroma[i] * qscale;
541 }
542
543 if (ctx->frame_type == 0) {
544 luma_stride = pic->linesize[0];
545 chroma_stride = pic->linesize[1];
546 } else {
547 luma_stride = pic->linesize[0] << 1;
548 chroma_stride = pic->linesize[1] << 1;
549 }
550
551 if (avctx->pix_fmt == AV_PIX_FMT_YUV444P10 || avctx->pix_fmt == AV_PIX_FMT_YUVA444P10) {
552 mb_x_shift = 5;
553 log2_chroma_blocks_per_mb = 2;
554 } else {
555 mb_x_shift = 4;
556 log2_chroma_blocks_per_mb = 1;
557 }
558
559 dest_y = pic->data[0] + (slice->mb_y << 4) * luma_stride + (slice->mb_x << 5);
560 dest_u = pic->data[1] + (slice->mb_y << 4) * chroma_stride + (slice->mb_x << mb_x_shift);
561 dest_v = pic->data[2] + (slice->mb_y << 4) * chroma_stride + (slice->mb_x << mb_x_shift);
562 dest_a = pic->data[3] + (slice->mb_y << 4) * luma_stride + (slice->mb_x << 5);
563
564 if (ctx->frame_type && ctx->first_field ^ ctx->frame->top_field_first) {
565 dest_y += pic->linesize[0];
566 dest_u += pic->linesize[1];
567 dest_v += pic->linesize[2];
568 dest_a += pic->linesize[3];
569 }
570
571 ret = decode_slice_luma(avctx, slice, (uint16_t*)dest_y, luma_stride,
572 buf, y_data_size, qmat_luma_scaled);
573 if (ret < 0)
574 return ret;
575
576 if (!(avctx->flags & CODEC_FLAG_GRAY)) {
577 ret = decode_slice_chroma(avctx, slice, (uint16_t*)dest_u, chroma_stride,
578 buf + y_data_size, u_data_size,
579 qmat_chroma_scaled, log2_chroma_blocks_per_mb);
580 if (ret < 0)
581 return ret;
582
583 ret = decode_slice_chroma(avctx, slice, (uint16_t*)dest_v, chroma_stride,
584 buf + y_data_size + u_data_size, v_data_size,
585 qmat_chroma_scaled, log2_chroma_blocks_per_mb);
586 if (ret < 0)
587 return ret;
588 }
589 /* decode alpha plane if available */
590 if (ctx->alpha_info && pic->data[3] && a_data_size)
591 decode_slice_alpha(ctx, (uint16_t*)dest_a, luma_stride,
592 buf + y_data_size + u_data_size + v_data_size,
593 a_data_size, slice->mb_count);
594
595 slice->ret = 0;
596 return 0;
597 }
598
599 static int decode_picture(AVCodecContext *avctx)
600 {
601 ProresContext *ctx = avctx->priv_data;
602 int i;
603
604 avctx->execute2(avctx, decode_slice_thread, NULL, NULL, ctx->slice_count);
605
606 for (i = 0; i < ctx->slice_count; i++)
607 if (ctx->slices[i].ret < 0)
608 return ctx->slices[i].ret;
609
610 return 0;
611 }
612
613 static int decode_frame(AVCodecContext *avctx, void *data, int *got_frame,
614 AVPacket *avpkt)
615 {
616 ProresContext *ctx = avctx->priv_data;
617 AVFrame *frame = data;
618 const uint8_t *buf = avpkt->data;
619 int buf_size = avpkt->size;
620 int frame_hdr_size, pic_size, ret;
621
622 if (buf_size < 28 || AV_RL32(buf + 4) != AV_RL32("icpf")) {
623 av_log(avctx, AV_LOG_ERROR, "invalid frame header\n");
624 return AVERROR_INVALIDDATA;
625 }
626
627 ctx->frame = frame;
628 ctx->frame->pict_type = AV_PICTURE_TYPE_I;
629 ctx->frame->key_frame = 1;
630 ctx->first_field = 1;
631
632 buf += 8;
633 buf_size -= 8;
634
635 frame_hdr_size = decode_frame_header(ctx, buf, buf_size, avctx);
636 if (frame_hdr_size < 0)
637 return frame_hdr_size;
638
639 buf += frame_hdr_size;
640 buf_size -= frame_hdr_size;
641
642 if ((ret = ff_get_buffer(avctx, frame, 0)) < 0)
643 return ret;
644
645 decode_picture:
646 pic_size = decode_picture_header(avctx, buf, buf_size);
647 if (pic_size < 0) {
648 av_log(avctx, AV_LOG_ERROR, "error decoding picture header\n");
649 return pic_size;
650 }
651
652 if ((ret = decode_picture(avctx)) < 0) {
653 av_log(avctx, AV_LOG_ERROR, "error decoding picture\n");
654 return ret;
655 }
656
657 buf += pic_size;
658 buf_size -= pic_size;
659
660 if (ctx->frame_type && buf_size > 0 && ctx->first_field) {
661 ctx->first_field = 0;
662 goto decode_picture;
663 }
664
665 *got_frame = 1;
666
667 return avpkt->size;
668 }
669
670 static av_cold int decode_close(AVCodecContext *avctx)
671 {
672 ProresContext *ctx = avctx->priv_data;
673
674 av_freep(&ctx->slices);
675
676 return 0;
677 }
678
679 AVCodec ff_prores_decoder = {
680 .name = "prores",
681 .long_name = NULL_IF_CONFIG_SMALL("ProRes"),
682 .type = AVMEDIA_TYPE_VIDEO,
683 .id = AV_CODEC_ID_PRORES,
684 .priv_data_size = sizeof(ProresContext),
685 .init = decode_init,
686 .close = decode_close,
687 .decode = decode_frame,
688 .capabilities = CODEC_CAP_DR1 | CODEC_CAP_SLICE_THREADS,
689 };