Libav
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 "idctdsp.h"
38 #include "internal.h"
39 #include "proresdata.h"
40 #include "proresdsp.h"
41 #include "get_bits.h"
42 
43 typedef struct {
44  const uint8_t *index;
45  int slice_num;
46  int x_pos, y_pos;
49  DECLARE_ALIGNED(16, int16_t, blocks)[8 * 4 * 64];
50  DECLARE_ALIGNED(16, int16_t, qmat_luma_scaled)[64];
51  DECLARE_ALIGNED(16, int16_t, qmat_chroma_scaled)[64];
53 
54 typedef struct {
59 
60  int frame_type;
61  int pic_format;
62  uint8_t qmat_luma[64];
63  uint8_t qmat_chroma[64];
67  int pic_num;
75  int num_x_mbs;
76  int num_y_mbs;
79 
80 
82 {
83  ProresContext *ctx = avctx->priv_data;
84 
85  ctx->total_slices = 0;
86  ctx->slice_data = NULL;
87 
89  ff_proresdsp_init(&ctx->dsp);
90 
91  ctx->scantable_type = -1; // set scantable type to uninitialized
92  memset(ctx->qmat_luma, 4, 64);
93  memset(ctx->qmat_chroma, 4, 64);
94 
95  return 0;
96 }
97 
98 
99 static int decode_frame_header(ProresContext *ctx, const uint8_t *buf,
100  const int data_size, AVCodecContext *avctx)
101 {
102  int hdr_size, version, width, height, flags;
103  const uint8_t *ptr;
104 
105  hdr_size = AV_RB16(buf);
106  if (hdr_size > data_size) {
107  av_log(avctx, AV_LOG_ERROR, "frame data too small\n");
108  return AVERROR_INVALIDDATA;
109  }
110 
111  version = AV_RB16(buf + 2);
112  if (version >= 2) {
113  av_log(avctx, AV_LOG_ERROR,
114  "unsupported header version: %d\n", version);
115  return AVERROR_INVALIDDATA;
116  }
117 
118  width = AV_RB16(buf + 8);
119  height = AV_RB16(buf + 10);
120  if (width != avctx->width || height != avctx->height) {
121  av_log(avctx, AV_LOG_ERROR,
122  "picture dimension changed: old: %d x %d, new: %d x %d\n",
123  avctx->width, avctx->height, width, height);
124  return AVERROR_INVALIDDATA;
125  }
126 
127  ctx->frame_type = (buf[12] >> 2) & 3;
128  if (ctx->frame_type > 2) {
129  av_log(avctx, AV_LOG_ERROR,
130  "unsupported frame type: %d\n", ctx->frame_type);
131  return AVERROR_INVALIDDATA;
132  }
133 
134  ctx->chroma_factor = (buf[12] >> 6) & 3;
135  ctx->mb_chroma_factor = ctx->chroma_factor + 2;
136  ctx->num_chroma_blocks = (1 << ctx->chroma_factor) >> 1;
137  ctx->alpha_info = buf[17] & 0xf;
138 
139  if (ctx->alpha_info > 2) {
140  av_log(avctx, AV_LOG_ERROR, "Invalid alpha mode %d\n", ctx->alpha_info);
141  return AVERROR_INVALIDDATA;
142  }
143 
144  switch (ctx->chroma_factor) {
145  case 2:
148  break;
149  case 3:
152  break;
153  default:
154  av_log(avctx, AV_LOG_ERROR,
155  "unsupported picture format: %d\n", ctx->pic_format);
156  return AVERROR_INVALIDDATA;
157  }
158 
159  if (ctx->scantable_type != ctx->frame_type) {
160  if (!ctx->frame_type)
163  else
166  ctx->scantable_type = ctx->frame_type;
167  }
168 
169  if (ctx->frame_type) { /* if interlaced */
170  ctx->frame->interlaced_frame = 1;
171  ctx->frame->top_field_first = ctx->frame_type & 1;
172  } else {
173  ctx->frame->interlaced_frame = 0;
174  }
175 
176  avctx->color_primaries = buf[14];
177  avctx->color_trc = buf[15];
178  avctx->colorspace = buf[16];
179 
180  ctx->qmat_changed = 0;
181  ptr = buf + 20;
182  flags = buf[19];
183  if (flags & 2) {
184  if (ptr - buf > hdr_size - 64) {
185  av_log(avctx, AV_LOG_ERROR, "header data too small\n");
186  return AVERROR_INVALIDDATA;
187  }
188  if (memcmp(ctx->qmat_luma, ptr, 64)) {
189  memcpy(ctx->qmat_luma, ptr, 64);
190  ctx->qmat_changed = 1;
191  }
192  ptr += 64;
193  } else {
194  memset(ctx->qmat_luma, 4, 64);
195  ctx->qmat_changed = 1;
196  }
197 
198  if (flags & 1) {
199  if (ptr - buf > hdr_size - 64) {
200  av_log(avctx, AV_LOG_ERROR, "header data too small\n");
201  return -1;
202  }
203  if (memcmp(ctx->qmat_chroma, ptr, 64)) {
204  memcpy(ctx->qmat_chroma, ptr, 64);
205  ctx->qmat_changed = 1;
206  }
207  } else {
208  memset(ctx->qmat_chroma, 4, 64);
209  ctx->qmat_changed = 1;
210  }
211 
212  return hdr_size;
213 }
214 
215 
216 static int decode_picture_header(ProresContext *ctx, const uint8_t *buf,
217  const int data_size, AVCodecContext *avctx)
218 {
219  int i, hdr_size, pic_data_size, num_slices;
220  int slice_width_factor, slice_height_factor;
221  int remainder, num_x_slices;
222  const uint8_t *data_ptr, *index_ptr;
223 
224  hdr_size = data_size > 0 ? buf[0] >> 3 : 0;
225  if (hdr_size < 8 || hdr_size > data_size) {
226  av_log(avctx, AV_LOG_ERROR, "picture header too small\n");
227  return AVERROR_INVALIDDATA;
228  }
229 
230  pic_data_size = AV_RB32(buf + 1);
231  if (pic_data_size > data_size) {
232  av_log(avctx, AV_LOG_ERROR, "picture data too small\n");
233  return AVERROR_INVALIDDATA;
234  }
235 
236  slice_width_factor = buf[7] >> 4;
237  slice_height_factor = buf[7] & 0xF;
238  if (slice_width_factor > 3 || slice_height_factor) {
239  av_log(avctx, AV_LOG_ERROR,
240  "unsupported slice dimension: %d x %d\n",
241  1 << slice_width_factor, 1 << slice_height_factor);
242  return AVERROR_INVALIDDATA;
243  }
244 
245  ctx->slice_width_factor = slice_width_factor;
246  ctx->slice_height_factor = slice_height_factor;
247 
248  ctx->num_x_mbs = (avctx->width + 15) >> 4;
249  ctx->num_y_mbs = (avctx->height +
250  (1 << (4 + ctx->frame->interlaced_frame)) - 1) >>
251  (4 + ctx->frame->interlaced_frame);
252 
253  remainder = ctx->num_x_mbs & ((1 << slice_width_factor) - 1);
254  num_x_slices = (ctx->num_x_mbs >> slice_width_factor) + (remainder & 1) +
255  ((remainder >> 1) & 1) + ((remainder >> 2) & 1);
256 
257  num_slices = num_x_slices * ctx->num_y_mbs;
258  if (num_slices != AV_RB16(buf + 5)) {
259  av_log(avctx, AV_LOG_ERROR, "invalid number of slices\n");
260  return AVERROR_INVALIDDATA;
261  }
262 
263  if (ctx->total_slices != num_slices) {
264  av_freep(&ctx->slice_data);
265  ctx->slice_data = av_malloc((num_slices + 1) * sizeof(ctx->slice_data[0]));
266  if (!ctx->slice_data)
267  return AVERROR(ENOMEM);
268  ctx->total_slices = num_slices;
269  }
270 
271  if (hdr_size + num_slices * 2 > data_size) {
272  av_log(avctx, AV_LOG_ERROR, "slice table too small\n");
273  return AVERROR_INVALIDDATA;
274  }
275 
276  /* parse slice table allowing quick access to the slice data */
277  index_ptr = buf + hdr_size;
278  data_ptr = index_ptr + num_slices * 2;
279 
280  for (i = 0; i < num_slices; i++) {
281  ctx->slice_data[i].index = data_ptr;
282  ctx->slice_data[i].prev_slice_sf = 0;
283  data_ptr += AV_RB16(index_ptr + i * 2);
284  }
285  ctx->slice_data[i].index = data_ptr;
286  ctx->slice_data[i].prev_slice_sf = 0;
287 
288  if (data_ptr > buf + data_size) {
289  av_log(avctx, AV_LOG_ERROR, "out of slice data\n");
290  return -1;
291  }
292 
293  return pic_data_size;
294 }
295 
296 
300 static inline int decode_vlc_codeword(GetBitContext *gb, unsigned codebook)
301 {
302  unsigned int rice_order, exp_order, switch_bits;
303  unsigned int buf, code;
304  int log, prefix_len, len;
305 
306  OPEN_READER(re, gb);
307  UPDATE_CACHE(re, gb);
308  buf = GET_CACHE(re, gb);
309 
310  /* number of prefix bits to switch between Rice and expGolomb */
311  switch_bits = (codebook & 3) + 1;
312  rice_order = codebook >> 5; /* rice code order */
313  exp_order = (codebook >> 2) & 7; /* exp golomb code order */
314 
315  log = 31 - av_log2(buf); /* count prefix bits (zeroes) */
316 
317  if (log < switch_bits) { /* ok, we got a rice code */
318  if (!rice_order) {
319  /* shortcut for faster decoding of rice codes without remainder */
320  code = log;
321  LAST_SKIP_BITS(re, gb, log + 1);
322  } else {
323  prefix_len = log + 1;
324  code = (log << rice_order) + NEG_USR32(buf << prefix_len, rice_order);
325  LAST_SKIP_BITS(re, gb, prefix_len + rice_order);
326  }
327  } else { /* otherwise we got a exp golomb code */
328  len = (log << 1) - switch_bits + exp_order + 1;
329  code = NEG_USR32(buf, len) - (1 << exp_order) + (switch_bits << rice_order);
330  LAST_SKIP_BITS(re, gb, len);
331  }
332 
333  CLOSE_READER(re, gb);
334 
335  return code;
336 }
337 
338 #define LSB2SIGN(x) (-((x) & 1))
339 #define TOSIGNED(x) (((x) >> 1) ^ LSB2SIGN(x))
340 
344 static inline void decode_dc_coeffs(GetBitContext *gb, int16_t *out,
345  int nblocks)
346 {
347  int16_t prev_dc;
348  int i, sign;
349  int16_t delta;
350  unsigned int code;
351 
352  code = decode_vlc_codeword(gb, FIRST_DC_CB);
353  out[0] = prev_dc = TOSIGNED(code);
354 
355  out += 64; /* move to the DC coeff of the next block */
356  delta = 3;
357 
358  for (i = 1; i < nblocks; i++, out += 64) {
359  code = decode_vlc_codeword(gb, ff_prores_dc_codebook[FFMIN(FFABS(delta), 3)]);
360 
361  sign = -(((delta >> 15) & 1) ^ (code & 1));
362  delta = (((code + 1) >> 1) ^ sign) - sign;
363  prev_dc += delta;
364  out[0] = prev_dc;
365  }
366 }
367 
368 
372 static inline int decode_ac_coeffs(GetBitContext *gb, int16_t *out,
373  int blocks_per_slice,
374  int plane_size_factor,
375  const uint8_t *scan)
376 {
377  int pos, block_mask, run, level, sign, run_cb_index, lev_cb_index;
378  int max_coeffs, bits_left;
379 
380  /* set initial prediction values */
381  run = 4;
382  level = 2;
383 
384  max_coeffs = blocks_per_slice << 6;
385  block_mask = blocks_per_slice - 1;
386 
387  for (pos = blocks_per_slice - 1; pos < max_coeffs;) {
388  run_cb_index = ff_prores_run_to_cb_index[FFMIN(run, 15)];
389  lev_cb_index = ff_prores_lev_to_cb_index[FFMIN(level, 9)];
390 
391  bits_left = get_bits_left(gb);
392  if (bits_left <= 0 || (bits_left <= 8 && !show_bits(gb, bits_left)))
393  return 0;
394 
395  run = decode_vlc_codeword(gb, ff_prores_ac_codebook[run_cb_index]);
396  if (run < 0)
397  return AVERROR_INVALIDDATA;
398 
399  bits_left = get_bits_left(gb);
400  if (bits_left <= 0 || (bits_left <= 8 && !show_bits(gb, bits_left)))
401  return AVERROR_INVALIDDATA;
402 
403  level = decode_vlc_codeword(gb, ff_prores_ac_codebook[lev_cb_index]) + 1;
404  if (level < 0)
405  return AVERROR_INVALIDDATA;
406 
407  pos += run + 1;
408  if (pos >= max_coeffs)
409  break;
410 
411  sign = get_sbits(gb, 1);
412  out[((pos & block_mask) << 6) + scan[pos >> plane_size_factor]] =
413  (level ^ sign) - sign;
414  }
415 
416  return 0;
417 }
418 
419 
424  const uint8_t *buf,
425  int data_size, uint16_t *out_ptr,
426  int linesize, int mbs_per_slice,
427  int blocks_per_mb, int plane_size_factor,
428  const int16_t *qmat, int is_chroma)
429 {
430  GetBitContext gb;
431  int16_t *block_ptr;
432  int mb_num, blocks_per_slice, ret;
433 
434  blocks_per_slice = mbs_per_slice * blocks_per_mb;
435 
436  memset(td->blocks, 0, 8 * 4 * 64 * sizeof(*td->blocks));
437 
438  init_get_bits(&gb, buf, data_size << 3);
439 
440  decode_dc_coeffs(&gb, td->blocks, blocks_per_slice);
441 
442  ret = decode_ac_coeffs(&gb, td->blocks, blocks_per_slice,
443  plane_size_factor, ctx->scantable.permutated);
444  if (ret < 0)
445  return ret;
446 
447  /* inverse quantization, inverse transform and output */
448  block_ptr = td->blocks;
449 
450  if (!is_chroma) {
451  for (mb_num = 0; mb_num < mbs_per_slice; mb_num++, out_ptr += blocks_per_mb * 4) {
452  ctx->dsp.idct_put(out_ptr, linesize, block_ptr, qmat);
453  block_ptr += 64;
454  if (blocks_per_mb > 2) {
455  ctx->dsp.idct_put(out_ptr + 8, linesize, block_ptr, qmat);
456  block_ptr += 64;
457  }
458  ctx->dsp.idct_put(out_ptr + linesize * 4, linesize, block_ptr, qmat);
459  block_ptr += 64;
460  if (blocks_per_mb > 2) {
461  ctx->dsp.idct_put(out_ptr + linesize * 4 + 8, linesize, block_ptr, qmat);
462  block_ptr += 64;
463  }
464  }
465  } else {
466  for (mb_num = 0; mb_num < mbs_per_slice; mb_num++, out_ptr += blocks_per_mb * 4) {
467  ctx->dsp.idct_put(out_ptr, linesize, block_ptr, qmat);
468  block_ptr += 64;
469  ctx->dsp.idct_put(out_ptr + linesize * 4, linesize, block_ptr, qmat);
470  block_ptr += 64;
471  if (blocks_per_mb > 2) {
472  ctx->dsp.idct_put(out_ptr + 8, linesize, block_ptr, qmat);
473  block_ptr += 64;
474  ctx->dsp.idct_put(out_ptr + linesize * 4 + 8, linesize, block_ptr, qmat);
475  block_ptr += 64;
476  }
477  }
478  }
479  return 0;
480 }
481 
482 
483 static void unpack_alpha(GetBitContext *gb, uint16_t *dst, int num_coeffs,
484  const int num_bits)
485 {
486  const int mask = (1 << num_bits) - 1;
487  int i, idx, val, alpha_val;
488 
489  idx = 0;
490  alpha_val = mask;
491  do {
492  do {
493  if (get_bits1(gb))
494  val = get_bits(gb, num_bits);
495  else {
496  int sign;
497  val = get_bits(gb, num_bits == 16 ? 7 : 4);
498  sign = val & 1;
499  val = (val + 2) >> 1;
500  if (sign)
501  val = -val;
502  }
503  alpha_val = (alpha_val + val) & mask;
504  if (num_bits == 16)
505  dst[idx++] = alpha_val >> 6;
506  else
507  dst[idx++] = (alpha_val << 2) | (alpha_val >> 6);
508  if (idx >= num_coeffs - 1)
509  break;
510  } while (get_bits1(gb));
511  val = get_bits(gb, 4);
512  if (!val)
513  val = get_bits(gb, 11);
514  if (idx + val > num_coeffs)
515  val = num_coeffs - idx;
516  if (num_bits == 16)
517  for (i = 0; i < val; i++)
518  dst[idx++] = alpha_val >> 6;
519  else
520  for (i = 0; i < val; i++)
521  dst[idx++] = (alpha_val << 2) | (alpha_val >> 6);
522  } while (idx < num_coeffs);
523 }
524 
529  const uint8_t *buf, int data_size,
530  uint16_t *out_ptr, int linesize,
531  int mbs_per_slice)
532 {
533  GetBitContext gb;
534  int i;
535  uint16_t *block_ptr;
536 
537  memset(td->blocks, 0, 8 * 4 * 64 * sizeof(*td->blocks));
538 
539  init_get_bits(&gb, buf, data_size << 3);
540 
541  if (ctx->alpha_info == 2)
542  unpack_alpha(&gb, td->blocks, mbs_per_slice * 4 * 64, 16);
543  else
544  unpack_alpha(&gb, td->blocks, mbs_per_slice * 4 * 64, 8);
545 
546  block_ptr = td->blocks;
547 
548  for (i = 0; i < 16; i++) {
549  memcpy(out_ptr, block_ptr, 16 * mbs_per_slice * sizeof(*out_ptr));
550  out_ptr += linesize >> 1;
551  block_ptr += 16 * mbs_per_slice;
552  }
553 }
554 
555 static int decode_slice(AVCodecContext *avctx, void *tdata)
556 {
557  ProresThreadData *td = tdata;
558  ProresContext *ctx = avctx->priv_data;
559  int mb_x_pos = td->x_pos;
560  int mb_y_pos = td->y_pos;
561  int pic_num = ctx->pic_num;
562  int slice_num = td->slice_num;
563  int mbs_per_slice = td->slice_width;
564  const uint8_t *buf;
565  uint8_t *y_data, *u_data, *v_data, *a_data;
566  AVFrame *pic = ctx->frame;
567  int i, sf, slice_width_factor;
568  int slice_data_size, hdr_size;
569  int y_data_size, u_data_size, v_data_size, a_data_size;
570  int y_linesize, u_linesize, v_linesize, a_linesize;
571  int coff[4];
572  int ret;
573 
574  buf = ctx->slice_data[slice_num].index;
575  slice_data_size = ctx->slice_data[slice_num + 1].index - buf;
576 
577  slice_width_factor = av_log2(mbs_per_slice);
578 
579  y_data = pic->data[0];
580  u_data = pic->data[1];
581  v_data = pic->data[2];
582  a_data = pic->data[3];
583  y_linesize = pic->linesize[0];
584  u_linesize = pic->linesize[1];
585  v_linesize = pic->linesize[2];
586  a_linesize = pic->linesize[3];
587 
588  if (pic->interlaced_frame) {
589  if (!(pic_num ^ pic->top_field_first)) {
590  y_data += y_linesize;
591  u_data += u_linesize;
592  v_data += v_linesize;
593  if (a_data)
594  a_data += a_linesize;
595  }
596  y_linesize <<= 1;
597  u_linesize <<= 1;
598  v_linesize <<= 1;
599  a_linesize <<= 1;
600  }
601  y_data += (mb_y_pos << 4) * y_linesize + (mb_x_pos << 5);
602  u_data += (mb_y_pos << 4) * u_linesize + (mb_x_pos << ctx->mb_chroma_factor);
603  v_data += (mb_y_pos << 4) * v_linesize + (mb_x_pos << ctx->mb_chroma_factor);
604  if (a_data)
605  a_data += (mb_y_pos << 4) * a_linesize + (mb_x_pos << 5);
606 
607  if (slice_data_size < 6) {
608  av_log(avctx, AV_LOG_ERROR, "slice data too small\n");
609  return AVERROR_INVALIDDATA;
610  }
611 
612  /* parse slice header */
613  hdr_size = buf[0] >> 3;
614  coff[0] = hdr_size;
615  y_data_size = AV_RB16(buf + 2);
616  coff[1] = coff[0] + y_data_size;
617  u_data_size = AV_RB16(buf + 4);
618  coff[2] = coff[1] + u_data_size;
619  v_data_size = hdr_size > 7 ? AV_RB16(buf + 6) : slice_data_size - coff[2];
620  coff[3] = coff[2] + v_data_size;
621  a_data_size = slice_data_size - coff[3];
622 
623  /* if V or alpha component size is negative that means that previous
624  component sizes are too large */
625  if (v_data_size < 0 || a_data_size < 0 || hdr_size < 6) {
626  av_log(avctx, AV_LOG_ERROR, "invalid data size\n");
627  return AVERROR_INVALIDDATA;
628  }
629 
630  sf = av_clip(buf[1], 1, 224);
631  sf = sf > 128 ? (sf - 96) << 2 : sf;
632 
633  /* scale quantization matrixes according with slice's scale factor */
634  /* TODO: this can be SIMD-optimized a lot */
635  if (ctx->qmat_changed || sf != td->prev_slice_sf) {
636  td->prev_slice_sf = sf;
637  for (i = 0; i < 64; i++) {
638  td->qmat_luma_scaled[ctx->dsp.idct_permutation[i]] = ctx->qmat_luma[i] * sf;
639  td->qmat_chroma_scaled[ctx->dsp.idct_permutation[i]] = ctx->qmat_chroma[i] * sf;
640  }
641  }
642 
643  /* decode luma plane */
644  ret = decode_slice_plane(ctx, td, buf + coff[0], y_data_size,
645  (uint16_t*) y_data, y_linesize,
646  mbs_per_slice, 4, slice_width_factor + 2,
647  td->qmat_luma_scaled, 0);
648 
649  if (ret < 0)
650  return ret;
651 
652  /* decode U chroma plane */
653  ret = decode_slice_plane(ctx, td, buf + coff[1], u_data_size,
654  (uint16_t*) u_data, u_linesize,
655  mbs_per_slice, ctx->num_chroma_blocks,
656  slice_width_factor + ctx->chroma_factor - 1,
657  td->qmat_chroma_scaled, 1);
658  if (ret < 0)
659  return ret;
660 
661  /* decode V chroma plane */
662  ret = decode_slice_plane(ctx, td, buf + coff[2], v_data_size,
663  (uint16_t*) v_data, v_linesize,
664  mbs_per_slice, ctx->num_chroma_blocks,
665  slice_width_factor + ctx->chroma_factor - 1,
666  td->qmat_chroma_scaled, 1);
667  if (ret < 0)
668  return ret;
669 
670  /* decode alpha plane if available */
671  if (a_data && a_data_size)
672  decode_alpha_plane(ctx, td, buf + coff[3], a_data_size,
673  (uint16_t*) a_data, a_linesize,
674  mbs_per_slice);
675 
676  return 0;
677 }
678 
679 
680 static int decode_picture(ProresContext *ctx, int pic_num,
681  AVCodecContext *avctx)
682 {
683  int slice_num, slice_width, x_pos, y_pos;
684 
685  slice_num = 0;
686 
687  ctx->pic_num = pic_num;
688  for (y_pos = 0; y_pos < ctx->num_y_mbs; y_pos++) {
689  slice_width = 1 << ctx->slice_width_factor;
690 
691  for (x_pos = 0; x_pos < ctx->num_x_mbs && slice_width;
692  x_pos += slice_width) {
693  while (ctx->num_x_mbs - x_pos < slice_width)
694  slice_width >>= 1;
695 
696  ctx->slice_data[slice_num].slice_num = slice_num;
697  ctx->slice_data[slice_num].x_pos = x_pos;
698  ctx->slice_data[slice_num].y_pos = y_pos;
699  ctx->slice_data[slice_num].slice_width = slice_width;
700 
701  slice_num++;
702  }
703  }
704 
705  return avctx->execute(avctx, decode_slice,
706  ctx->slice_data, NULL, slice_num,
707  sizeof(ctx->slice_data[0]));
708 }
709 
710 
711 #define MOVE_DATA_PTR(nbytes) buf += (nbytes); buf_size -= (nbytes)
712 
713 static int decode_frame(AVCodecContext *avctx, void *data, int *got_frame,
714  AVPacket *avpkt)
715 {
716  ProresContext *ctx = avctx->priv_data;
717  const uint8_t *buf = avpkt->data;
718  int buf_size = avpkt->size;
719  int frame_hdr_size, pic_num, pic_data_size;
720 
721  ctx->frame = data;
723  ctx->frame->key_frame = 1;
724 
725  /* check frame atom container */
726  if (buf_size < 28 || buf_size < AV_RB32(buf) ||
727  AV_RB32(buf + 4) != FRAME_ID) {
728  av_log(avctx, AV_LOG_ERROR, "invalid frame\n");
729  return AVERROR_INVALIDDATA;
730  }
731 
732  MOVE_DATA_PTR(8);
733 
734  frame_hdr_size = decode_frame_header(ctx, buf, buf_size, avctx);
735  if (frame_hdr_size < 0)
736  return AVERROR_INVALIDDATA;
737 
738  MOVE_DATA_PTR(frame_hdr_size);
739 
740  if (ff_get_buffer(avctx, ctx->frame, 0) < 0)
741  return -1;
742 
743  for (pic_num = 0; ctx->frame->interlaced_frame - pic_num + 1; pic_num++) {
744  pic_data_size = decode_picture_header(ctx, buf, buf_size, avctx);
745  if (pic_data_size < 0)
746  return AVERROR_INVALIDDATA;
747 
748  if (decode_picture(ctx, pic_num, avctx))
749  return -1;
750 
751  MOVE_DATA_PTR(pic_data_size);
752  }
753 
754  ctx->frame = NULL;
755  *got_frame = 1;
756 
757  return avpkt->size;
758 }
759 
760 
762 {
763  ProresContext *ctx = avctx->priv_data;
764 
765  av_freep(&ctx->slice_data);
766 
767  return 0;
768 }
769 
770 
772  .name = "prores",
773  .long_name = NULL_IF_CONFIG_SMALL("Apple ProRes (iCodec Pro)"),
774  .type = AVMEDIA_TYPE_VIDEO,
775  .id = AV_CODEC_ID_PRORES,
776  .priv_data_size = sizeof(ProresContext),
777  .init = decode_init,
778  .close = decode_close,
779  .decode = decode_frame,
780  .capabilities = CODEC_CAP_DR1 | CODEC_CAP_SLICE_THREADS,
781 };
static void unpack_alpha(GetBitContext *gb, uint16_t *dst, int num_coeffs, const int num_bits)
Definition: proresdec.c:483
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:62
#define AVERROR_INVALIDDATA
Invalid data found when processing input.
Definition: error.h:54
This structure describes decoded (raw) audio or video data.
Definition: frame.h:135
static int decode_ac_coeffs(GetBitContext *gb, int16_t *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:372
uint8_t qmat_luma[64]
dequantization matrix for luma
Definition: proresdec.c:62
#define TOSIGNED(x)
Definition: proresdec.c:339
#define AV_PIX_FMT_YUVA422P10
Definition: pixfmt.h:258
#define MOVE_DATA_PTR(nbytes)
Definition: proresdec.c:711
static unsigned int get_bits(GetBitContext *s, int n)
Read 1-25 bits.
Definition: get_bits.h:240
const uint8_t ff_prores_ac_codebook[7]
Definition: proresdata.c:55
Scantable.
Definition: idctdsp.h:29
int size
Definition: avcodec.h:968
#define DECLARE_ALIGNED(n, t, v)
Definition: mem.h:58
enum AVPixelFormat pix_fmt
Pixel format, see AV_PIX_FMT_xxx.
Definition: avcodec.h:1248
static av_cold int decode_init(AVCodecContext *avctx)
Definition: proresdec.c:81
uint8_t permutated[64]
Definition: idctdsp.h:31
uint8_t run
Definition: svq3.c:146
int bits_per_raw_sample
Bits per sample/pixel of internal libavcodec pixel/sample format.
Definition: avcodec.h:2508
static int decode_picture_header(ProresContext *ctx, const uint8_t *buf, const int data_size, AVCodecContext *avctx)
Definition: proresdec.c:216
int scantable_type
-1 = uninitialized, 0 = progressive, 1/2 = interlaced
Definition: proresdec.c:58
AVCodec.
Definition: avcodec.h:2790
static int get_sbits(GetBitContext *s, int n)
Definition: get_bits.h:226
av_cold void ff_proresdsp_init(ProresDSPContext *dsp)
Definition: proresdsp.c:58
int slice_height_factor
Definition: proresdec.c:74
static int decode_frame(AVCodecContext *avctx, void *data, int *got_frame, AVPacket *avpkt)
Definition: proresdec.c:713
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:198
const uint8_t * index
pointers to the data of this slice
Definition: proresdec.c:44
static int decode(MimicContext *ctx, int quality, int num_coeffs, int is_iframe)
Definition: mimic.c:275
AVFrame * frame
Definition: proresdec.c:56
uint8_t
#define av_cold
Definition: attributes.h:66
float delta
#define AV_RB32
Definition: intreadwrite.h:130
#define CODEC_CAP_DR1
Codec uses get_buffer() for allocating buffers and supports custom allocators.
Definition: avcodec.h:684
const char data[16]
Definition: mxf.c:70
uint8_t * data
Definition: avcodec.h:967
const uint8_t ff_prores_run_to_cb_index[16]
Lookup tables for adaptive switching between codebooks according with previous run/level value...
Definition: proresdata.c:69
static int flags
Definition: log.c:44
const uint8_t ff_prores_lev_to_cb_index[10]
Definition: proresdata.c:72
bitstream reader API header.
int interlaced_frame
The content of the picture is interlaced.
Definition: frame.h:320
ProresThreadData * slice_data
Definition: proresdec.c:66
int16_t qmat_chroma_scaled[64]
Definition: proresdec.c:51
static int get_bits_left(GetBitContext *gb)
Definition: get_bits.h:555
#define UPDATE_CACHE(name, gb)
Definition: get_bits.h:161
#define AV_LOG_ERROR
Something went wrong and cannot losslessly be recovered.
Definition: log.h:123
static void decode_dc_coeffs(GetBitContext *gb, int16_t *out, int nblocks)
Decode DC coefficients for all blocks in a slice.
Definition: proresdec.c:344
static int decode_slice(AVCodecContext *avctx, void *tdata)
Definition: proresdec.c:555
static const uint16_t mask[17]
Definition: lzw.c:38
#define AV_RB16
Definition: intreadwrite.h:53
int mb_chroma_factor
Definition: proresdec.c:69
#define AVERROR(e)
Definition: error.h:43
int num_y_slices
Definition: proresdec.c:72
static av_cold int decode_close(AVCodecContext *avctx)
Definition: proresdec.c:761
#define NULL_IF_CONFIG_SMALL(x)
Return NULL if CONFIG_SMALL is true, otherwise the argument without modification. ...
Definition: internal.h:150
void av_log(void *avcl, int level, const char *fmt,...)
Definition: log.c:168
const char * name
Name of the codec implementation.
Definition: avcodec.h:2797
#define AV_PIX_FMT_YUV444P10
Definition: pixfmt.h:245
#define CLOSE_READER(name, gb)
Definition: get_bits.h:141
enum AVPictureType pict_type
Picture type of the frame.
Definition: frame.h:196
#define FFMIN(a, b)
Definition: common.h:57
int num_chroma_blocks
number of chrominance blocks in a macroblock
Definition: proresdec.c:70
int width
picture width / height.
Definition: avcodec.h:1218
#define NEG_USR32(a, s)
Definition: mathops.h:163
uint8_t idct_permutation[64]
Definition: proresdsp.h:32
const uint8_t ff_prores_dc_codebook[4]
Definition: proresdata.c:48
enum AVColorPrimaries color_primaries
Chromaticity coordinates of the source primaries.
Definition: avcodec.h:1739
static unsigned int show_bits(GetBitContext *s, int n)
Show 1-25 bits.
Definition: get_bits.h:254
#define FFABS(a)
Definition: common.h:52
#define LAST_SKIP_BITS(name, gb, num)
Definition: get_bits.h:182
int total_slices
total number of slices in a picture
Definition: proresdec.c:65
#define AV_PIX_FMT_YUVA444P10
Definition: pixfmt.h:259
static int decode_vlc_codeword(GetBitContext *gb, unsigned codebook)
Read an unsigned rice/exp golomb codeword.
Definition: proresdec.c:300
ProresDSPContext dsp
Definition: proresdec.c:55
int alpha_info
Definition: proresdec.c:77
#define FIRST_DC_CB
Definition: proresdata.h:33
NULL
Definition: eval.c:55
int chroma_factor
Definition: proresdec.c:68
static int width
Definition: utils.c:156
const uint8_t ff_prores_interlaced_scan[64]
Definition: proresdata.c:36
Libavcodec external API header.
int slice_width_factor
Definition: proresdec.c:73
int num_x_slices
Definition: proresdec.c:71
ScanTable scantable
Definition: proresdec.c:57
version
Definition: ffv1enc.c:1080
int linesize[AV_NUM_DATA_POINTERS]
For video, size in bytes of each picture line.
Definition: frame.h:153
main external API structure.
Definition: avcodec.h:1044
void(* idct_put)(uint16_t *out, int linesize, int16_t *block, const int16_t *qmat)
Definition: proresdsp.h:33
static void close(AVCodecParserContext *s)
Definition: h264_parser.c:490
const uint8_t ff_prores_progressive_scan[64]
Definition: proresdata.c:25
int ff_get_buffer(AVCodecContext *avctx, AVFrame *frame, int flags)
Get a buffer for a frame.
Definition: utils.c:603
#define OPEN_READER(name, gb)
Definition: get_bits.h:127
static int decode_frame_header(ProresContext *ctx, const uint8_t *buf, const int data_size, AVCodecContext *avctx)
Definition: proresdec.c:99
static unsigned int get_bits1(GetBitContext *s)
Definition: get_bits.h:271
enum AVColorSpace colorspace
YUV colorspace type.
Definition: avcodec.h:1753
enum AVColorTransferCharacteristic color_trc
Color Transfer Characteristic.
Definition: avcodec.h:1746
static int init_get_bits(GetBitContext *s, const uint8_t *buffer, int bit_size)
Initialize GetBitContext.
Definition: get_bits.h:375
#define GET_CACHE(name, gb)
Definition: get_bits.h:192
AVCodec ff_prores_decoder
Definition: proresdec.c:771
static int decode_picture(ProresContext *ctx, int pic_num, AVCodecContext *avctx)
Definition: proresdec.c:680
static void decode_alpha_plane(ProresContext *ctx, ProresThreadData *td, const uint8_t *buf, int data_size, uint16_t *out_ptr, int linesize, int mbs_per_slice)
Decode alpha slice plane.
Definition: proresdec.c:528
int pic_format
2 = 422, 3 = 444
Definition: proresdec.c:61
#define AV_PIX_FMT_YUV422P10
Definition: pixfmt.h:244
uint8_t * data[AV_NUM_DATA_POINTERS]
pointer to the picture/channel planes.
Definition: frame.h:141
uint8_t level
Definition: svq3.c:147
int prev_slice_sf
scalefactor of the previous decoded slice
Definition: proresdec.c:48
int height
Definition: gxfenc.c:72
uint8_t pi<< 24) CONV_FUNC_GROUP(AV_SAMPLE_FMT_FLT, float, AV_SAMPLE_FMT_U8, uint8_t,(*(constuint8_t *) pi-0x80)*(1.0f/(1<< 7))) CONV_FUNC_GROUP(AV_SAMPLE_FMT_DBL, double, AV_SAMPLE_FMT_U8, uint8_t,(*(constuint8_t *) pi-0x80)*(1.0/(1<< 7))) CONV_FUNC_GROUP(AV_SAMPLE_FMT_U8, uint8_t, AV_SAMPLE_FMT_S16, int16_t,(*(constint16_t *) pi >>8)+0x80) CONV_FUNC_GROUP(AV_SAMPLE_FMT_FLT, float, AV_SAMPLE_FMT_S16, int16_t,*(constint16_t *) pi *(1.0f/(1<< 15))) CONV_FUNC_GROUP(AV_SAMPLE_FMT_DBL, double, AV_SAMPLE_FMT_S16, int16_t,*(constint16_t *) pi *(1.0/(1<< 15))) CONV_FUNC_GROUP(AV_SAMPLE_FMT_U8, uint8_t, AV_SAMPLE_FMT_S32, int32_t,(*(constint32_t *) pi >>24)+0x80) CONV_FUNC_GROUP(AV_SAMPLE_FMT_FLT, float, AV_SAMPLE_FMT_S32, int32_t,*(constint32_t *) pi *(1.0f/(1U<< 31))) CONV_FUNC_GROUP(AV_SAMPLE_FMT_DBL, double, AV_SAMPLE_FMT_S32, int32_t,*(constint32_t *) pi *(1.0/(1U<< 31))) CONV_FUNC_GROUP(AV_SAMPLE_FMT_U8, uint8_t, AV_SAMPLE_FMT_FLT, float, av_clip_uint8(lrintf(*(constfloat *) pi *(1<< 7))+0x80)) CONV_FUNC_GROUP(AV_SAMPLE_FMT_S16, int16_t, AV_SAMPLE_FMT_FLT, float, av_clip_int16(lrintf(*(constfloat *) pi *(1<< 15)))) CONV_FUNC_GROUP(AV_SAMPLE_FMT_S32, int32_t, AV_SAMPLE_FMT_FLT, float, av_clipl_int32(llrintf(*(constfloat *) pi *(1U<< 31)))) CONV_FUNC_GROUP(AV_SAMPLE_FMT_U8, uint8_t, AV_SAMPLE_FMT_DBL, double, av_clip_uint8(lrint(*(constdouble *) pi *(1<< 7))+0x80)) CONV_FUNC_GROUP(AV_SAMPLE_FMT_S16, int16_t, AV_SAMPLE_FMT_DBL, double, av_clip_int16(lrint(*(constdouble *) pi *(1<< 15)))) CONV_FUNC_GROUP(AV_SAMPLE_FMT_S32, int32_t, AV_SAMPLE_FMT_DBL, double, av_clipl_int32(llrint(*(constdouble *) pi *(1U<< 31))))#defineSET_CONV_FUNC_GROUP(ofmt, ifmt) staticvoidset_generic_function(AudioConvert *ac){}voidff_audio_convert_free(AudioConvert **ac){if(!*ac) return;ff_dither_free(&(*ac) ->dc);av_freep(ac);}AudioConvert *ff_audio_convert_alloc(AVAudioResampleContext *avr, enumAVSampleFormatout_fmt, enumAVSampleFormatin_fmt, intchannels, intsample_rate, intapply_map){AudioConvert *ac;intin_planar, out_planar;ac=av_mallocz(sizeof(*ac));if(!ac) returnNULL;ac->avr=avr;ac->out_fmt=out_fmt;ac->in_fmt=in_fmt;ac->channels=channels;ac->apply_map=apply_map;if(avr->dither_method!=AV_RESAMPLE_DITHER_NONE &&av_get_packed_sample_fmt(out_fmt)==AV_SAMPLE_FMT_S16 &&av_get_bytes_per_sample(in_fmt)>2){ac->dc=ff_dither_alloc(avr, out_fmt, in_fmt, channels, sample_rate, apply_map);if(!ac->dc){av_free(ac);returnNULL;}returnac;}in_planar=ff_sample_fmt_is_planar(in_fmt, channels);out_planar=ff_sample_fmt_is_planar(out_fmt, channels);if(in_planar==out_planar){ac->func_type=CONV_FUNC_TYPE_FLAT;ac->planes=in_planar?ac->channels:1;}elseif(in_planar) ac->func_type=CONV_FUNC_TYPE_INTERLEAVE;elseac->func_type=CONV_FUNC_TYPE_DEINTERLEAVE;set_generic_function(ac);if(ARCH_AARCH64) ff_audio_convert_init_aarch64(ac);if(ARCH_ARM) ff_audio_convert_init_arm(ac);if(ARCH_X86) ff_audio_convert_init_x86(ac);returnac;}intff_audio_convert(AudioConvert *ac, AudioData *out, AudioData *in){intuse_generic=1;intlen=in->nb_samples;intp;if(ac->dc){av_dlog(ac->avr,"%dsamples-audio_convert:%sto%s(dithered)\n", len, av_get_sample_fmt_name(ac->in_fmt), av_get_sample_fmt_name(ac->out_fmt));returnff_convert_dither(ac-> out
#define CODEC_CAP_SLICE_THREADS
Codec supports slice-based (or partition-based) multithreading.
Definition: avcodec.h:759
common internal api header.
int qmat_changed
1 - global quantization matrices changed
Definition: proresdec.c:64
#define PRORES_BITS_PER_SAMPLE
output precision of prores decoder
Definition: proresdsp.h:28
static av_cold int init(AVCodecParserContext *s)
Definition: h264_parser.c:499
void * priv_data
Definition: avcodec.h:1086
float re
Definition: fft-test.c:69
uint8_t qmat_chroma[64]
dequantization matrix for chroma
Definition: proresdec.c:63
av_cold void ff_init_scantable(uint8_t *permutation, ScanTable *st, const uint8_t *src_scantable)
Definition: idctdsp.c:28
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:2574
int top_field_first
If the content is interlaced, is top field displayed first.
Definition: frame.h:325
int len
#define av_log2
Definition: intmath.h:85
int key_frame
1 -> keyframe, 0-> not
Definition: frame.h:191
#define FRAME_ID
Definition: proresdata.h:28
int frame_type
0 = progressive, 1 = top-field first, 2 = bottom-field first
Definition: proresdec.c:60
This structure stores compressed data.
Definition: avcodec.h:944
int16_t qmat_luma_scaled[64]
Definition: proresdec.c:50
static int 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, int is_chroma)
Decode a slice plane (luma or chroma).
Definition: proresdec.c:423
int16_t blocks[8 *4 *64]
Definition: proresdec.c:49