proresdec.c
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1 /*
2  * Apple ProRes compatible decoder
3  *
4  * Copyright (c) 2010-2011 Maxim Poliakovski
5  *
6  * This file is part of Libav.
7  *
8  * Libav is free software; you can redistribute it and/or
9  * modify it under the terms of the GNU Lesser General Public
10  * License as published by the Free Software Foundation; either
11  * version 2.1 of the License, or (at your option) any later version.
12  *
13  * Libav is distributed in the hope that it will be useful,
14  * but WITHOUT ANY WARRANTY; without even the implied warranty of
15  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
16  * Lesser General Public License for more details.
17  *
18  * You should have received a copy of the GNU Lesser General Public
19  * License along with Libav; if not, write to the Free Software
20  * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA
21  */
22 
31 #define LONG_BITSTREAM_READER // some ProRes vlc codes require up to 28 bits to be read at once
32 
33 #include <stdint.h>
34 
35 #include "libavutil/intmath.h"
36 #include "avcodec.h"
37 #include "proresdsp.h"
38 #include "get_bits.h"
39 
40 typedef struct {
41  const uint8_t *index;
42  int slice_num;
43  int x_pos, y_pos;
45  DECLARE_ALIGNED(16, DCTELEM, blocks[8 * 4 * 64]);
47 
48 typedef struct {
53 
54  int frame_type;
55  int pic_format;
56  uint8_t qmat_luma[64];
57  uint8_t qmat_chroma[64];
60  DECLARE_ALIGNED(16, int16_t, qmat_luma_scaled[64]);
61  DECLARE_ALIGNED(16, int16_t, qmat_chroma_scaled[64]);
64  int pic_num;
72  int num_x_mbs;
73  int num_y_mbs;
76 
77 
78 static const uint8_t progressive_scan[64] = {
79  0, 1, 8, 9, 2, 3, 10, 11,
80  16, 17, 24, 25, 18, 19, 26, 27,
81  4, 5, 12, 20, 13, 6, 7, 14,
82  21, 28, 29, 22, 15, 23, 30, 31,
83  32, 33, 40, 48, 41, 34, 35, 42,
84  49, 56, 57, 50, 43, 36, 37, 44,
85  51, 58, 59, 52, 45, 38, 39, 46,
86  53, 60, 61, 54, 47, 55, 62, 63
87 };
88 
89 static const uint8_t interlaced_scan[64] = {
90  0, 8, 1, 9, 16, 24, 17, 25,
91  2, 10, 3, 11, 18, 26, 19, 27,
92  32, 40, 33, 34, 41, 48, 56, 49,
93  42, 35, 43, 50, 57, 58, 51, 59,
94  4, 12, 5, 6, 13, 20, 28, 21,
95  14, 7, 15, 22, 29, 36, 44, 37,
96  30, 23, 31, 38, 45, 52, 60, 53,
97  46, 39, 47, 54, 61, 62, 55, 63
98 };
99 
100 
102 {
103  ProresContext *ctx = avctx->priv_data;
104 
105  ctx->total_slices = 0;
106  ctx->slice_data = NULL;
107 
109  ff_proresdsp_init(&ctx->dsp);
110 
111  avctx->coded_frame = &ctx->picture;
114  ctx->picture.key_frame = 1;
115 
116  ctx->scantable_type = -1; // set scantable type to uninitialized
117  memset(ctx->qmat_luma, 4, 64);
118  memset(ctx->qmat_chroma, 4, 64);
119  ctx->prev_slice_sf = 0;
120 
121  return 0;
122 }
123 
124 
125 static int decode_frame_header(ProresContext *ctx, const uint8_t *buf,
126  const int data_size, AVCodecContext *avctx)
127 {
128  int hdr_size, version, width, height, flags;
129  const uint8_t *ptr;
130 
131  hdr_size = AV_RB16(buf);
132  if (hdr_size > data_size) {
133  av_log(avctx, AV_LOG_ERROR, "frame data too small\n");
134  return AVERROR_INVALIDDATA;
135  }
136 
137  version = AV_RB16(buf + 2);
138  if (version >= 2) {
139  av_log(avctx, AV_LOG_ERROR,
140  "unsupported header version: %d\n", version);
141  return AVERROR_INVALIDDATA;
142  }
143 
144  width = AV_RB16(buf + 8);
145  height = AV_RB16(buf + 10);
146  if (width != avctx->width || height != avctx->height) {
147  av_log(avctx, AV_LOG_ERROR,
148  "picture dimension changed: old: %d x %d, new: %d x %d\n",
149  avctx->width, avctx->height, width, height);
150  return AVERROR_INVALIDDATA;
151  }
152 
153  ctx->frame_type = (buf[12] >> 2) & 3;
154  if (ctx->frame_type > 2) {
155  av_log(avctx, AV_LOG_ERROR,
156  "unsupported frame type: %d\n", ctx->frame_type);
157  return AVERROR_INVALIDDATA;
158  }
159 
160  ctx->chroma_factor = (buf[12] >> 6) & 3;
161  ctx->mb_chroma_factor = ctx->chroma_factor + 2;
162  ctx->num_chroma_blocks = (1 << ctx->chroma_factor) >> 1;
163  switch (ctx->chroma_factor) {
164  case 2:
165  avctx->pix_fmt = PIX_FMT_YUV422P10;
166  break;
167  case 3:
168  avctx->pix_fmt = PIX_FMT_YUV444P10;
169  break;
170  default:
171  av_log(avctx, AV_LOG_ERROR,
172  "unsupported picture format: %d\n", ctx->pic_format);
173  return AVERROR_INVALIDDATA;
174  }
175 
176  if (ctx->scantable_type != ctx->frame_type) {
177  if (!ctx->frame_type)
180  else
183  ctx->scantable_type = ctx->frame_type;
184  }
185 
186  if (ctx->frame_type) { /* if interlaced */
187  ctx->picture.interlaced_frame = 1;
188  ctx->picture.top_field_first = ctx->frame_type & 1;
189  } else {
190  ctx->picture.interlaced_frame = 0;
191  }
192 
193  ctx->alpha_info = buf[17] & 0xf;
194  if (ctx->alpha_info)
195  av_log_missing_feature(avctx, "alpha channel", 0);
196 
197  ctx->qmat_changed = 0;
198  ptr = buf + 20;
199  flags = buf[19];
200  if (flags & 2) {
201  if (ptr - buf > hdr_size - 64) {
202  av_log(avctx, AV_LOG_ERROR, "header data too small\n");
203  return AVERROR_INVALIDDATA;
204  }
205  if (memcmp(ctx->qmat_luma, ptr, 64)) {
206  memcpy(ctx->qmat_luma, ptr, 64);
207  ctx->qmat_changed = 1;
208  }
209  ptr += 64;
210  } else {
211  memset(ctx->qmat_luma, 4, 64);
212  ctx->qmat_changed = 1;
213  }
214 
215  if (flags & 1) {
216  if (ptr - buf > hdr_size - 64) {
217  av_log(avctx, AV_LOG_ERROR, "header data too small\n");
218  return -1;
219  }
220  if (memcmp(ctx->qmat_chroma, ptr, 64)) {
221  memcpy(ctx->qmat_chroma, ptr, 64);
222  ctx->qmat_changed = 1;
223  }
224  } else {
225  memset(ctx->qmat_chroma, 4, 64);
226  ctx->qmat_changed = 1;
227  }
228 
229  return hdr_size;
230 }
231 
232 
233 static int decode_picture_header(ProresContext *ctx, const uint8_t *buf,
234  const int data_size, AVCodecContext *avctx)
235 {
236  int i, hdr_size, pic_data_size, num_slices;
237  int slice_width_factor, slice_height_factor;
238  int remainder, num_x_slices;
239  const uint8_t *data_ptr, *index_ptr;
240 
241  hdr_size = data_size > 0 ? buf[0] >> 3 : 0;
242  if (hdr_size < 8 || hdr_size > data_size) {
243  av_log(avctx, AV_LOG_ERROR, "picture header too small\n");
244  return AVERROR_INVALIDDATA;
245  }
246 
247  pic_data_size = AV_RB32(buf + 1);
248  if (pic_data_size > data_size) {
249  av_log(avctx, AV_LOG_ERROR, "picture data too small\n");
250  return AVERROR_INVALIDDATA;
251  }
252 
253  slice_width_factor = buf[7] >> 4;
254  slice_height_factor = buf[7] & 0xF;
255  if (slice_width_factor > 3 || slice_height_factor) {
256  av_log(avctx, AV_LOG_ERROR,
257  "unsupported slice dimension: %d x %d\n",
258  1 << slice_width_factor, 1 << slice_height_factor);
259  return AVERROR_INVALIDDATA;
260  }
261 
262  ctx->slice_width_factor = slice_width_factor;
263  ctx->slice_height_factor = slice_height_factor;
264 
265  ctx->num_x_mbs = (avctx->width + 15) >> 4;
266  ctx->num_y_mbs = (avctx->height +
267  (1 << (4 + ctx->picture.interlaced_frame)) - 1) >>
268  (4 + ctx->picture.interlaced_frame);
269 
270  remainder = ctx->num_x_mbs & ((1 << slice_width_factor) - 1);
271  num_x_slices = (ctx->num_x_mbs >> slice_width_factor) + (remainder & 1) +
272  ((remainder >> 1) & 1) + ((remainder >> 2) & 1);
273 
274  num_slices = num_x_slices * ctx->num_y_mbs;
275  if (num_slices != AV_RB16(buf + 5)) {
276  av_log(avctx, AV_LOG_ERROR, "invalid number of slices\n");
277  return AVERROR_INVALIDDATA;
278  }
279 
280  if (ctx->total_slices != num_slices) {
281  av_freep(&ctx->slice_data);
282  ctx->slice_data = av_malloc((num_slices + 1) * sizeof(ctx->slice_data[0]));
283  if (!ctx->slice_data)
284  return AVERROR(ENOMEM);
285  ctx->total_slices = num_slices;
286  }
287 
288  if (hdr_size + num_slices * 2 > data_size) {
289  av_log(avctx, AV_LOG_ERROR, "slice table too small\n");
290  return AVERROR_INVALIDDATA;
291  }
292 
293  /* parse slice table allowing quick access to the slice data */
294  index_ptr = buf + hdr_size;
295  data_ptr = index_ptr + num_slices * 2;
296 
297  for (i = 0; i < num_slices; i++) {
298  ctx->slice_data[i].index = data_ptr;
299  data_ptr += AV_RB16(index_ptr + i * 2);
300  }
301  ctx->slice_data[i].index = data_ptr;
302 
303  if (data_ptr > buf + data_size) {
304  av_log(avctx, AV_LOG_ERROR, "out of slice data\n");
305  return -1;
306  }
307 
308  return pic_data_size;
309 }
310 
311 
315 static inline int decode_vlc_codeword(GetBitContext *gb, uint8_t codebook)
316 {
317  unsigned int rice_order, exp_order, switch_bits;
318  unsigned int buf, code;
319  int log, prefix_len, len;
320 
321  OPEN_READER(re, gb);
322  UPDATE_CACHE(re, gb);
323  buf = GET_CACHE(re, gb);
324 
325  /* number of prefix bits to switch between Rice and expGolomb */
326  switch_bits = (codebook & 3) + 1;
327  rice_order = codebook >> 5; /* rice code order */
328  exp_order = (codebook >> 2) & 7; /* exp golomb code order */
329 
330  log = 31 - av_log2(buf); /* count prefix bits (zeroes) */
331 
332  if (log < switch_bits) { /* ok, we got a rice code */
333  if (!rice_order) {
334  /* shortcut for faster decoding of rice codes without remainder */
335  code = log;
336  LAST_SKIP_BITS(re, gb, log + 1);
337  } else {
338  prefix_len = log + 1;
339  code = (log << rice_order) + NEG_USR32(buf << prefix_len, rice_order);
340  LAST_SKIP_BITS(re, gb, prefix_len + rice_order);
341  }
342  } else { /* otherwise we got a exp golomb code */
343  len = (log << 1) - switch_bits + exp_order + 1;
344  code = NEG_USR32(buf, len) - (1 << exp_order) + (switch_bits << rice_order);
345  LAST_SKIP_BITS(re, gb, len);
346  }
347 
348  CLOSE_READER(re, gb);
349 
350  return code;
351 }
352 
353 #define LSB2SIGN(x) (-((x) & 1))
354 #define TOSIGNED(x) (((x) >> 1) ^ LSB2SIGN(x))
355 
356 #define FIRST_DC_CB 0xB8 // rice_order = 5, exp_golomb_order = 6, switch_bits = 0
357 
358 static uint8_t dc_codebook[4] = {
359  0x04, // rice_order = 0, exp_golomb_order = 1, switch_bits = 0
360  0x28, // rice_order = 1, exp_golomb_order = 2, switch_bits = 0
361  0x4D, // rice_order = 2, exp_golomb_order = 3, switch_bits = 1
362  0x70 // rice_order = 3, exp_golomb_order = 4, switch_bits = 0
363 };
364 
365 
369 static inline void decode_dc_coeffs(GetBitContext *gb, DCTELEM *out,
370  int nblocks)
371 {
372  DCTELEM prev_dc;
373  int i, sign;
374  int16_t delta;
375  unsigned int code;
376 
377  code = decode_vlc_codeword(gb, FIRST_DC_CB);
378  out[0] = prev_dc = TOSIGNED(code);
379 
380  out += 64; /* move to the DC coeff of the next block */
381  delta = 3;
382 
383  for (i = 1; i < nblocks; i++, out += 64) {
384  code = decode_vlc_codeword(gb, dc_codebook[FFMIN(FFABS(delta), 3)]);
385 
386  sign = -(((delta >> 15) & 1) ^ (code & 1));
387  delta = (((code + 1) >> 1) ^ sign) - sign;
388  prev_dc += delta;
389  out[0] = prev_dc;
390  }
391 }
392 
393 
394 static uint8_t ac_codebook[7] = {
395  0x04, // rice_order = 0, exp_golomb_order = 1, switch_bits = 0
396  0x28, // rice_order = 1, exp_golomb_order = 2, switch_bits = 0
397  0x4C, // rice_order = 2, exp_golomb_order = 3, switch_bits = 0
398  0x05, // rice_order = 0, exp_golomb_order = 1, switch_bits = 1
399  0x29, // rice_order = 1, exp_golomb_order = 2, switch_bits = 1
400  0x06, // rice_order = 0, exp_golomb_order = 1, switch_bits = 2
401  0x0A, // rice_order = 0, exp_golomb_order = 2, switch_bits = 2
402 };
403 
408 static uint8_t run_to_cb_index[16] =
409  { 5, 5, 3, 3, 0, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 2 };
410 
411 static uint8_t lev_to_cb_index[10] = { 0, 6, 3, 5, 0, 1, 1, 1, 1, 2 };
412 
413 
417 static inline void decode_ac_coeffs(GetBitContext *gb, DCTELEM *out,
418  int blocks_per_slice,
419  int plane_size_factor,
420  const uint8_t *scan)
421 {
422  int pos, block_mask, run, level, sign, run_cb_index, lev_cb_index;
423  int max_coeffs, bits_left;
424 
425  /* set initial prediction values */
426  run = 4;
427  level = 2;
428 
429  max_coeffs = blocks_per_slice << 6;
430  block_mask = blocks_per_slice - 1;
431 
432  for (pos = blocks_per_slice - 1; pos < max_coeffs;) {
433  run_cb_index = run_to_cb_index[FFMIN(run, 15)];
434  lev_cb_index = lev_to_cb_index[FFMIN(level, 9)];
435 
436  bits_left = get_bits_left(gb);
437  if (bits_left <= 0 || (bits_left <= 8 && !show_bits(gb, bits_left)))
438  return;
439 
440  run = decode_vlc_codeword(gb, ac_codebook[run_cb_index]);
441 
442  bits_left = get_bits_left(gb);
443  if (bits_left <= 0 || (bits_left <= 8 && !show_bits(gb, bits_left)))
444  return;
445 
446  level = decode_vlc_codeword(gb, ac_codebook[lev_cb_index]) + 1;
447 
448  pos += run + 1;
449  if (pos >= max_coeffs)
450  break;
451 
452  sign = get_sbits(gb, 1);
453  out[((pos & block_mask) << 6) + scan[pos >> plane_size_factor]] =
454  (level ^ sign) - sign;
455  }
456 }
457 
458 
463  const uint8_t *buf,
464  int data_size, uint16_t *out_ptr,
465  int linesize, int mbs_per_slice,
466  int blocks_per_mb, int plane_size_factor,
467  const int16_t *qmat)
468 {
469  GetBitContext gb;
470  DCTELEM *block_ptr;
471  int mb_num, blocks_per_slice;
472 
473  blocks_per_slice = mbs_per_slice * blocks_per_mb;
474 
475  memset(td->blocks, 0, 8 * 4 * 64 * sizeof(*td->blocks));
476 
477  init_get_bits(&gb, buf, data_size << 3);
478 
479  decode_dc_coeffs(&gb, td->blocks, blocks_per_slice);
480 
481  decode_ac_coeffs(&gb, td->blocks, blocks_per_slice,
482  plane_size_factor, ctx->scantable.permutated);
483 
484  /* inverse quantization, inverse transform and output */
485  block_ptr = td->blocks;
486 
487  for (mb_num = 0; mb_num < mbs_per_slice; mb_num++, out_ptr += blocks_per_mb * 4) {
488  ctx->dsp.idct_put(out_ptr, linesize, block_ptr, qmat);
489  block_ptr += 64;
490  if (blocks_per_mb > 2) {
491  ctx->dsp.idct_put(out_ptr + 8, linesize, block_ptr, qmat);
492  block_ptr += 64;
493  }
494  ctx->dsp.idct_put(out_ptr + linesize * 4, linesize, block_ptr, qmat);
495  block_ptr += 64;
496  if (blocks_per_mb > 2) {
497  ctx->dsp.idct_put(out_ptr + linesize * 4 + 8, linesize, block_ptr, qmat);
498  block_ptr += 64;
499  }
500  }
501 }
502 
503 
504 static int decode_slice(AVCodecContext *avctx, void *tdata)
505 {
506  ProresThreadData *td = tdata;
507  ProresContext *ctx = avctx->priv_data;
508  int mb_x_pos = td->x_pos;
509  int mb_y_pos = td->y_pos;
510  int pic_num = ctx->pic_num;
511  int slice_num = td->slice_num;
512  int mbs_per_slice = td->slice_width;
513  const uint8_t *buf;
514  uint8_t *y_data, *u_data, *v_data;
515  AVFrame *pic = avctx->coded_frame;
516  int i, sf, slice_width_factor;
517  int slice_data_size, hdr_size, y_data_size, u_data_size, v_data_size;
518  int y_linesize, u_linesize, v_linesize;
519 
520  buf = ctx->slice_data[slice_num].index;
521  slice_data_size = ctx->slice_data[slice_num + 1].index - buf;
522 
523  slice_width_factor = av_log2(mbs_per_slice);
524 
525  y_data = pic->data[0];
526  u_data = pic->data[1];
527  v_data = pic->data[2];
528  y_linesize = pic->linesize[0];
529  u_linesize = pic->linesize[1];
530  v_linesize = pic->linesize[2];
531 
532  if (pic->interlaced_frame) {
533  if (!(pic_num ^ pic->top_field_first)) {
534  y_data += y_linesize;
535  u_data += u_linesize;
536  v_data += v_linesize;
537  }
538  y_linesize <<= 1;
539  u_linesize <<= 1;
540  v_linesize <<= 1;
541  }
542 
543  if (slice_data_size < 6) {
544  av_log(avctx, AV_LOG_ERROR, "slice data too small\n");
545  return AVERROR_INVALIDDATA;
546  }
547 
548  /* parse slice header */
549  hdr_size = buf[0] >> 3;
550  y_data_size = AV_RB16(buf + 2);
551  u_data_size = AV_RB16(buf + 4);
552  v_data_size = hdr_size > 7 ? AV_RB16(buf + 6) :
553  slice_data_size - y_data_size - u_data_size - hdr_size;
554 
555  if (hdr_size + y_data_size + u_data_size + v_data_size > slice_data_size ||
556  v_data_size < 0 || hdr_size < 6) {
557  av_log(avctx, AV_LOG_ERROR, "invalid data size\n");
558  return AVERROR_INVALIDDATA;
559  }
560 
561  sf = av_clip(buf[1], 1, 224);
562  sf = sf > 128 ? (sf - 96) << 2 : sf;
563 
564  /* scale quantization matrixes according with slice's scale factor */
565  /* TODO: this can be SIMD-optimized a lot */
566  if (ctx->qmat_changed || sf != ctx->prev_slice_sf) {
567  ctx->prev_slice_sf = sf;
568  for (i = 0; i < 64; i++) {
569  ctx->qmat_luma_scaled[ctx->dsp.idct_permutation[i]] = ctx->qmat_luma[i] * sf;
570  ctx->qmat_chroma_scaled[ctx->dsp.idct_permutation[i]] = ctx->qmat_chroma[i] * sf;
571  }
572  }
573 
574  /* decode luma plane */
575  decode_slice_plane(ctx, td, buf + hdr_size, y_data_size,
576  (uint16_t*) (y_data + (mb_y_pos << 4) * y_linesize +
577  (mb_x_pos << 5)), y_linesize,
578  mbs_per_slice, 4, slice_width_factor + 2,
579  ctx->qmat_luma_scaled);
580 
581  /* decode U chroma plane */
582  decode_slice_plane(ctx, td, buf + hdr_size + y_data_size, u_data_size,
583  (uint16_t*) (u_data + (mb_y_pos << 4) * u_linesize +
584  (mb_x_pos << ctx->mb_chroma_factor)),
585  u_linesize, mbs_per_slice, ctx->num_chroma_blocks,
586  slice_width_factor + ctx->chroma_factor - 1,
587  ctx->qmat_chroma_scaled);
588 
589  /* decode V chroma plane */
590  decode_slice_plane(ctx, td, buf + hdr_size + y_data_size + u_data_size,
591  v_data_size,
592  (uint16_t*) (v_data + (mb_y_pos << 4) * v_linesize +
593  (mb_x_pos << ctx->mb_chroma_factor)),
594  v_linesize, mbs_per_slice, ctx->num_chroma_blocks,
595  slice_width_factor + ctx->chroma_factor - 1,
596  ctx->qmat_chroma_scaled);
597 
598  return 0;
599 }
600 
601 
602 static int decode_picture(ProresContext *ctx, int pic_num,
603  AVCodecContext *avctx)
604 {
605  int slice_num, slice_width, x_pos, y_pos;
606 
607  slice_num = 0;
608 
609  ctx->pic_num = pic_num;
610  for (y_pos = 0; y_pos < ctx->num_y_mbs; y_pos++) {
611  slice_width = 1 << ctx->slice_width_factor;
612 
613  for (x_pos = 0; x_pos < ctx->num_x_mbs && slice_width;
614  x_pos += slice_width) {
615  while (ctx->num_x_mbs - x_pos < slice_width)
616  slice_width >>= 1;
617 
618  ctx->slice_data[slice_num].slice_num = slice_num;
619  ctx->slice_data[slice_num].x_pos = x_pos;
620  ctx->slice_data[slice_num].y_pos = y_pos;
621  ctx->slice_data[slice_num].slice_width = slice_width;
622 
623  slice_num++;
624  }
625  }
626 
627  return avctx->execute(avctx, decode_slice,
628  ctx->slice_data, NULL, slice_num,
629  sizeof(ctx->slice_data[0]));
630 }
631 
632 
633 #define FRAME_ID MKBETAG('i', 'c', 'p', 'f')
634 #define MOVE_DATA_PTR(nbytes) buf += (nbytes); buf_size -= (nbytes)
635 
636 static int decode_frame(AVCodecContext *avctx, void *data, int *data_size,
637  AVPacket *avpkt)
638 {
639  ProresContext *ctx = avctx->priv_data;
640  AVFrame *picture = avctx->coded_frame;
641  const uint8_t *buf = avpkt->data;
642  int buf_size = avpkt->size;
643  int frame_hdr_size, pic_num, pic_data_size;
644 
645  /* check frame atom container */
646  if (buf_size < 28 || buf_size < AV_RB32(buf) ||
647  AV_RB32(buf + 4) != FRAME_ID) {
648  av_log(avctx, AV_LOG_ERROR, "invalid frame\n");
649  return AVERROR_INVALIDDATA;
650  }
651 
652  MOVE_DATA_PTR(8);
653 
654  frame_hdr_size = decode_frame_header(ctx, buf, buf_size, avctx);
655  if (frame_hdr_size < 0)
656  return AVERROR_INVALIDDATA;
657 
658  MOVE_DATA_PTR(frame_hdr_size);
659 
660  if (picture->data[0])
661  avctx->release_buffer(avctx, picture);
662 
663  picture->reference = 0;
664  if (avctx->get_buffer(avctx, picture) < 0)
665  return -1;
666 
667  for (pic_num = 0; ctx->picture.interlaced_frame - pic_num + 1; pic_num++) {
668  pic_data_size = decode_picture_header(ctx, buf, buf_size, avctx);
669  if (pic_data_size < 0)
670  return AVERROR_INVALIDDATA;
671 
672  if (decode_picture(ctx, pic_num, avctx))
673  return -1;
674 
675  MOVE_DATA_PTR(pic_data_size);
676  }
677 
678  *data_size = sizeof(AVPicture);
679  *(AVFrame*) data = *avctx->coded_frame;
680 
681  return avpkt->size;
682 }
683 
684 
686 {
687  ProresContext *ctx = avctx->priv_data;
688 
689  if (ctx->picture.data[0])
690  avctx->release_buffer(avctx, &ctx->picture);
691 
692  av_freep(&ctx->slice_data);
693 
694  return 0;
695 }
696 
697 
699  .name = "prores",
700  .type = AVMEDIA_TYPE_VIDEO,
701  .id = CODEC_ID_PRORES,
702  .priv_data_size = sizeof(ProresContext),
703  .init = decode_init,
704  .close = decode_close,
705  .decode = decode_frame,
706  .capabilities = CODEC_CAP_DR1 | CODEC_CAP_SLICE_THREADS,
707  .long_name = NULL_IF_CONFIG_SMALL("Apple ProRes (iCodec Pro)")
708 };
int(* get_buffer)(struct AVCodecContext *c, AVFrame *pic)
Called at the beginning of each frame to get a buffer for it.
Definition: avcodec.h:1726
enum PixelFormat pix_fmt
Pixel format, see PIX_FMT_xxx.
Definition: avcodec.h:1426
#define AVERROR_INVALIDDATA
Invalid data found when processing input.
Definition: error.h:54
AV_WL32 AV_WL24 AV_WL16 AV_WB32 AV_WB24 AV_RB16
Definition: bytestream.h:89
Audio Video Frame.
Definition: avcodec.h:985
static uint8_t ac_codebook[7]
Definition: proresdec.c:394
AV_WL32 AV_WL24 AV_WL16 AV_RB32
Definition: bytestream.h:89
uint8_t qmat_luma[64]
dequantization matrix for luma
Definition: proresdec.c:56
#define TOSIGNED(x)
Definition: proresdec.c:354
void(* release_buffer)(struct AVCodecContext *c, AVFrame *pic)
Called to release buffers which were allocated with get_buffer.
Definition: avcodec.h:1737
#define MOVE_DATA_PTR(nbytes)
Definition: proresdec.c:634
static void decode_slice_plane(ProresContext *ctx, ProresThreadData *td, const uint8_t *buf, int data_size, uint16_t *out_ptr, int linesize, int mbs_per_slice, int blocks_per_mb, int plane_size_factor, const int16_t *qmat)
Decode a slice plane (luma or chroma).
Definition: proresdec.c:462
static int decode_frame(AVCodecContext *avctx, void *data, int *data_size, AVPacket *avpkt)
Definition: proresdec.c:636
int prev_slice_sf
scalefactor of the previous decoded slice
Definition: proresdec.c:59
AVFrame * coded_frame
the picture in the bitstream
Definition: avcodec.h:2000
Scantable.
Definition: dsputil.h:196
int size
Definition: avcodec.h:909
int width
Definition: rotozoom.c:164
#define DECLARE_ALIGNED(n, t, v)
Definition: mem.h:55
#define FRAME_ID
Definition: proresdec.c:633
static av_cold int decode_init(AVCodecContext *avctx)
Definition: proresdec.c:101
DCTELEM blocks[8 *4 *64]
Definition: proresdec.c:45
uint8_t permutated[64]
Definition: dsputil.h:198
uint8_t run
Definition: svq3.c:123
int bits_per_raw_sample
Bits per sample/pixel of internal libavcodec pixel/sample format.
Definition: avcodec.h:2863
static int decode_picture_header(ProresContext *ctx, const uint8_t *buf, const int data_size, AVCodecContext *avctx)
Definition: proresdec.c:233
int scantable_type
-1 = uninitialized, 0 = progressive, 1/2 = interlaced
Definition: proresdec.c:52
AVCodec.
Definition: avcodec.h:3189
static int get_sbits(GetBitContext *s, int n)
Definition: get_bits.h:223
int slice_height_factor
Definition: proresdec.c:71
void av_freep(void *arg)
Free a memory block which has been allocated with av_malloc(z)() or av_realloc() and set the pointer ...
Definition: mem.c:147
const uint8_t * index
pointers to the data of this slice
Definition: proresdec.c:41
static int decode(MimicContext *ctx, int quality, int num_coeffs, int is_iframe)
Definition: mimic.c:228
#define av_cold
Definition: attributes.h:71
float delta
static uint8_t dc_codebook[4]
Definition: proresdec.c:358
int16_t qmat_luma_scaled[64]
Definition: proresdec.c:60
const char data[16]
Definition: mxf.c:60
void(* idct_put)(uint16_t *out, int linesize, DCTELEM *block, const int16_t *qmat)
Definition: proresdsp.h:33
uint8_t * data
Definition: avcodec.h:908
static int flags
Definition: log.c:34
bitstream reader API header.
int interlaced_frame
The content of the picture is interlaced.
Definition: avcodec.h:1167
static int init(AVCodecParserContext *s)
Definition: h264_parser.c:336
#define CODEC_CAP_DR1
Codec uses get_buffer() for allocating buffers and supports custom allocators.
Definition: avcodec.h:719
ProresThreadData * slice_data
Definition: proresdec.c:63
static int get_bits_left(GetBitContext *gb)
Definition: get_bits.h:513
#define UPDATE_CACHE(name, gb)
Definition: get_bits.h:160
static int decode_slice(AVCodecContext *avctx, void *tdata)
Definition: proresdec.c:504
int reference
is this picture used as reference The values for this are the same as the MpegEncContext.picture_structure variable, that is 1->top field, 2->bottom field, 3->frame/both fields.
Definition: avcodec.h:1074
int mb_chroma_factor
Definition: proresdec.c:66
#define AVERROR(e)
Definition: error.h:43
int num_y_slices
Definition: proresdec.c:69
static av_cold int decode_close(AVCodecContext *avctx)
Definition: proresdec.c:685
#define NULL_IF_CONFIG_SMALL(x)
Return NULL if CONFIG_SMALL is true, otherwise the argument without modification. ...
Definition: internal.h:191
void av_log(void *avcl, int level, const char *fmt,...)
Definition: log.c:140
const char * name
Name of the codec implementation.
Definition: avcodec.h:3196
int16_t qmat_chroma_scaled[64]
Definition: proresdec.c:61
#define CLOSE_READER(name, gb)
Definition: get_bits.h:140
static AVFrame * picture
#define FFMIN(a, b)
Definition: common.h:55
int num_chroma_blocks
number of chrominance blocks in a macroblock
Definition: proresdec.c:67
int width
picture width / height.
Definition: avcodec.h:1408
#define NEG_USR32(a, s)
Definition: mathops.h:146
int type
type of the buffer (to keep track of who has to deallocate data[*])
Definition: avcodec.h:1147
uint8_t idct_permutation[64]
Definition: proresdsp.h:32
static unsigned int show_bits(GetBitContext *s, int n)
Show 1-25 bits.
Definition: get_bits.h:251
#define FFABS(a)
Definition: common.h:50
#define LAST_SKIP_BITS(name, gb, num)
Definition: get_bits.h:180
int total_slices
total number of slices in a picture
Definition: proresdec.c:62
static void decode_dc_coeffs(GetBitContext *gb, DCTELEM *out, int nblocks)
Decode DC coefficients for all blocks in a slice.
Definition: proresdec.c:369
version
Definition: libspeexenc.c:304
ProresDSPContext dsp
Definition: proresdec.c:49
int alpha_info
Definition: proresdec.c:74
static void decode_ac_coeffs(GetBitContext *gb, DCTELEM *out, int blocks_per_slice, int plane_size_factor, const uint8_t *scan)
Decode AC coefficients for all blocks in a slice.
Definition: proresdec.c:417
NULL
Definition: eval.c:50
int chroma_factor
Definition: proresdec.c:65
static uint8_t lev_to_cb_index[10]
Definition: proresdec.c:411
external API header
int slice_width_factor
Definition: proresdec.c:70
int num_x_slices
Definition: proresdec.c:68
ScanTable scantable
Definition: proresdec.c:51
int linesize[AV_NUM_DATA_POINTERS]
Size, in bytes, of the data for each picture/channel plane.
Definition: avcodec.h:1008
#define PIX_FMT_YUV422P10
Definition: pixfmt.h:188
main external API structure.
Definition: avcodec.h:1329
static void close(AVCodecParserContext *s)
Definition: h264_parser.c:327
#define AV_LOG_ERROR
Something went wrong and cannot losslessly be recovered.
Definition: log.h:111
struct AVPicture AVPicture
four components are given, that's all.
#define OPEN_READER(name, gb)
Definition: get_bits.h:124
static int decode_frame_header(ProresContext *ctx, const uint8_t *buf, const int data_size, AVCodecContext *avctx)
Definition: proresdec.c:125
void * av_malloc(size_t size)
Allocate a block of size bytes with alignment suitable for all memory accesses (including vectors if ...
Definition: mem.c:64
static int init_get_bits(GetBitContext *s, const uint8_t *buffer, int bit_size)
Initialize GetBitContext.
Definition: get_bits.h:354
#define GET_CACHE(name, gb)
Definition: get_bits.h:190
AVFrame picture
Definition: proresdec.c:50
AVCodec ff_prores_decoder
Definition: proresdec.c:698
static int decode_vlc_codeword(GetBitContext *gb, uint8_t codebook)
Read an unsigned rice/exp golomb codeword.
Definition: proresdec.c:315
static int decode_picture(ProresContext *ctx, int pic_num, AVCodecContext *avctx)
Definition: proresdec.c:602
short DCTELEM
Definition: dsputil.h:39
void ff_proresdsp_init(ProresDSPContext *dsp)
Definition: proresdsp.c:54
int pic_format
2 = 422, 3 = 444
Definition: proresdec.c:55
static uint8_t run_to_cb_index[16]
Lookup tables for adaptive switching between codebooks according with previous run/level value...
Definition: proresdec.c:408
static const uint8_t interlaced_scan[64]
Definition: proresdec.c:89
uint8_t * data[AV_NUM_DATA_POINTERS]
pointer to the picture/channel planes.
Definition: avcodec.h:997
uint8_t level
Definition: svq3.c:123
int height
Definition: gxfenc.c:73
int qmat_changed
1 - global quantization matrices changed
Definition: proresdec.c:58
#define PRORES_BITS_PER_SAMPLE
output precision of prores decoder
Definition: proresdsp.h:28
static const uint8_t progressive_scan[64]
Definition: proresdec.c:78
void * priv_data
Definition: avcodec.h:1531
#define PIX_FMT_YUV444P10
Definition: pixfmt.h:189
float re
Definition: fft-test.c:61
uint8_t qmat_chroma[64]
dequantization matrix for chroma
Definition: proresdec.c:57
int(* execute)(struct AVCodecContext *c, int(*func)(struct AVCodecContext *c2, void *arg), void *arg2, int *ret, int count, int size)
The codec may call this to execute several independent things.
Definition: avcodec.h:2403
int top_field_first
If the content is interlaced, is top field displayed first.
Definition: avcodec.h:1174
int len
void ff_init_scantable(uint8_t *permutation, ScanTable *st, const uint8_t *src_scantable)
Definition: dsputil.c:124
#define CODEC_CAP_SLICE_THREADS
Codec supports slice-based (or partition-based) multithreading.
Definition: avcodec.h:792
int key_frame
1 -> keyframe, 0-> not
Definition: avcodec.h:1022
void avcodec_get_frame_defaults(AVFrame *pic)
Set the fields of the given AVFrame to default values.
Definition: utils.c:609
#define FIRST_DC_CB
Definition: proresdec.c:356
void av_log_missing_feature(void *avc, const char *feature, int want_sample)
Log a generic warning message about a missing feature.
Definition: utils.c:1714
int frame_type
0 = progressive, 1 = top-field first, 2 = bottom-field first
Definition: proresdec.c:54