FFmpeg
ffv1dec.c
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1 /*
2  * FFV1 decoder
3  *
4  * Copyright (c) 2003-2013 Michael Niedermayer <michaelni@gmx.at>
5  *
6  * This file is part of FFmpeg.
7  *
8  * FFmpeg 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  * FFmpeg 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 FFmpeg; if not, write to the Free Software
20  * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA
21  */
22 
23 /**
24  * @file
25  * FF Video Codec 1 (a lossless codec) decoder
26  */
27 
28 #include "libavutil/avassert.h"
29 #include "libavutil/crc.h"
30 #include "libavutil/opt.h"
31 #include "libavutil/imgutils.h"
32 #include "libavutil/pixdesc.h"
33 #include "avcodec.h"
34 #include "internal.h"
35 #include "get_bits.h"
36 #include "rangecoder.h"
37 #include "golomb.h"
38 #include "mathops.h"
39 #include "ffv1.h"
40 
42  int is_signed)
43 {
44  if (get_rac(c, state + 0))
45  return 0;
46  else {
47  int i, e;
48  unsigned a;
49  e = 0;
50  while (get_rac(c, state + 1 + FFMIN(e, 9))) { // 1..10
51  e++;
52  if (e > 31)
53  return AVERROR_INVALIDDATA;
54  }
55 
56  a = 1;
57  for (i = e - 1; i >= 0; i--)
58  a += a + get_rac(c, state + 22 + FFMIN(i, 9)); // 22..31
59 
60  e = -(is_signed && get_rac(c, state + 11 + FFMIN(e, 10))); // 11..21
61  return (a ^ e) - e;
62  }
63 }
64 
65 static av_noinline int get_symbol(RangeCoder *c, uint8_t *state, int is_signed)
66 {
67  return get_symbol_inline(c, state, is_signed);
68 }
69 
70 static inline int get_vlc_symbol(GetBitContext *gb, VlcState *const state,
71  int bits)
72 {
73  int k, i, v, ret;
74 
75  i = state->count;
76  k = 0;
77  while (i < state->error_sum) { // FIXME: optimize
78  k++;
79  i += i;
80  }
81 
82  v = get_sr_golomb(gb, k, 12, bits);
83  ff_dlog(NULL, "v:%d bias:%d error:%d drift:%d count:%d k:%d",
84  v, state->bias, state->error_sum, state->drift, state->count, k);
85 
86  v ^= ((2 * state->drift + state->count) >> 31);
87 
88  ret = fold(v + state->bias, bits);
89 
90  update_vlc_state(state, v);
91 
92  return ret;
93 }
94 
96 {
97  if (s->ac != AC_GOLOMB_RICE) {
98  RangeCoder *const c = &s->c;
99  if (c->overread > MAX_OVERREAD)
100  return AVERROR_INVALIDDATA;
101  } else {
102  if (get_bits_left(&s->gb) < 1)
103  return AVERROR_INVALIDDATA;
104  }
105  return 0;
106 }
107 
108 #define TYPE int16_t
109 #define RENAME(name) name
110 #include "ffv1dec_template.c"
111 #undef TYPE
112 #undef RENAME
113 
114 #define TYPE int32_t
115 #define RENAME(name) name ## 32
116 #include "ffv1dec_template.c"
117 
119  int w, int h, int stride, int plane_index,
120  int pixel_stride)
121 {
122  int x, y;
123  int16_t *sample[2];
124  sample[0] = s->sample_buffer + 3;
125  sample[1] = s->sample_buffer + w + 6 + 3;
126 
127  s->run_index = 0;
128 
129  memset(s->sample_buffer, 0, 2 * (w + 6) * sizeof(*s->sample_buffer));
130 
131  for (y = 0; y < h; y++) {
132  int16_t *temp = sample[0]; // FIXME: try a normal buffer
133 
134  sample[0] = sample[1];
135  sample[1] = temp;
136 
137  sample[1][-1] = sample[0][0];
138  sample[0][w] = sample[0][w - 1];
139 
140  if (s->avctx->bits_per_raw_sample <= 8) {
141  int ret = decode_line(s, w, sample, plane_index, 8);
142  if (ret < 0)
143  return ret;
144  for (x = 0; x < w; x++)
145  src[x*pixel_stride + stride * y] = sample[1][x];
146  } else {
147  int ret = decode_line(s, w, sample, plane_index, s->avctx->bits_per_raw_sample);
148  if (ret < 0)
149  return ret;
150  if (s->packed_at_lsb) {
151  for (x = 0; x < w; x++) {
152  ((uint16_t*)(src + stride*y))[x*pixel_stride] = sample[1][x];
153  }
154  } else {
155  for (x = 0; x < w; x++) {
156  ((uint16_t*)(src + stride*y))[x*pixel_stride] = sample[1][x] << (16 - s->avctx->bits_per_raw_sample) | ((uint16_t **)sample)[1][x] >> (2 * s->avctx->bits_per_raw_sample - 16);
157  }
158  }
159  }
160  }
161  return 0;
162 }
163 
165 {
166  RangeCoder *c = &fs->c;
168  unsigned ps, i, context_count;
169  memset(state, 128, sizeof(state));
170 
171  av_assert0(f->version > 2);
172 
173  fs->slice_x = get_symbol(c, state, 0) * f->width ;
174  fs->slice_y = get_symbol(c, state, 0) * f->height;
175  fs->slice_width = (get_symbol(c, state, 0) + 1) * f->width + fs->slice_x;
176  fs->slice_height = (get_symbol(c, state, 0) + 1) * f->height + fs->slice_y;
177 
178  fs->slice_x /= f->num_h_slices;
179  fs->slice_y /= f->num_v_slices;
180  fs->slice_width = fs->slice_width /f->num_h_slices - fs->slice_x;
181  fs->slice_height = fs->slice_height/f->num_v_slices - fs->slice_y;
182  if ((unsigned)fs->slice_width > f->width || (unsigned)fs->slice_height > f->height)
183  return -1;
184  if ( (unsigned)fs->slice_x + (uint64_t)fs->slice_width > f->width
185  || (unsigned)fs->slice_y + (uint64_t)fs->slice_height > f->height)
186  return -1;
187 
188  for (i = 0; i < f->plane_count; i++) {
189  PlaneContext * const p = &fs->plane[i];
190  int idx = get_symbol(c, state, 0);
191  if (idx >= (unsigned)f->quant_table_count) {
192  av_log(f->avctx, AV_LOG_ERROR, "quant_table_index out of range\n");
193  return -1;
194  }
195  p->quant_table_index = idx;
196  memcpy(p->quant_table, f->quant_tables[idx], sizeof(p->quant_table));
197  context_count = f->context_count[idx];
198 
199  if (p->context_count < context_count) {
200  av_freep(&p->state);
201  av_freep(&p->vlc_state);
202  }
204  }
205 
206  ps = get_symbol(c, state, 0);
207  if (ps == 1) {
208  f->cur->interlaced_frame = 1;
209  f->cur->top_field_first = 1;
210  } else if (ps == 2) {
211  f->cur->interlaced_frame = 1;
212  f->cur->top_field_first = 0;
213  } else if (ps == 3) {
214  f->cur->interlaced_frame = 0;
215  }
216  f->cur->sample_aspect_ratio.num = get_symbol(c, state, 0);
217  f->cur->sample_aspect_ratio.den = get_symbol(c, state, 0);
218 
219  if (av_image_check_sar(f->width, f->height,
220  f->cur->sample_aspect_ratio) < 0) {
221  av_log(f->avctx, AV_LOG_WARNING, "ignoring invalid SAR: %u/%u\n",
224  f->cur->sample_aspect_ratio = (AVRational){ 0, 1 };
225  }
226 
227  if (fs->version > 3) {
228  fs->slice_reset_contexts = get_rac(c, state);
229  fs->slice_coding_mode = get_symbol(c, state, 0);
230  if (fs->slice_coding_mode != 1) {
231  fs->slice_rct_by_coef = get_symbol(c, state, 0);
232  fs->slice_rct_ry_coef = get_symbol(c, state, 0);
233  if ((uint64_t)fs->slice_rct_by_coef + (uint64_t)fs->slice_rct_ry_coef > 4) {
234  av_log(f->avctx, AV_LOG_ERROR, "slice_rct_y_coef out of range\n");
235  return AVERROR_INVALIDDATA;
236  }
237  }
238  }
239 
240  return 0;
241 }
242 
243 static int decode_slice(AVCodecContext *c, void *arg)
244 {
245  FFV1Context *fs = *(void **)arg;
246  FFV1Context *f = fs->avctx->priv_data;
247  int width, height, x, y, ret;
248  const int ps = av_pix_fmt_desc_get(c->pix_fmt)->comp[0].step;
249  AVFrame * const p = f->cur;
250  int i, si;
251 
252  for( si=0; fs != f->slice_context[si]; si ++)
253  ;
254 
255  if(f->fsrc && !p->key_frame)
257 
258  if(f->fsrc && !p->key_frame) {
259  FFV1Context *fssrc = f->fsrc->slice_context[si];
260  FFV1Context *fsdst = f->slice_context[si];
261  av_assert1(fsdst->plane_count == fssrc->plane_count);
262  av_assert1(fsdst == fs);
263 
264  if (!p->key_frame)
265  fsdst->slice_damaged |= fssrc->slice_damaged;
266 
267  for (i = 0; i < f->plane_count; i++) {
268  PlaneContext *psrc = &fssrc->plane[i];
269  PlaneContext *pdst = &fsdst->plane[i];
270 
271  av_free(pdst->state);
272  av_free(pdst->vlc_state);
273  memcpy(pdst, psrc, sizeof(*pdst));
274  pdst->state = NULL;
275  pdst->vlc_state = NULL;
276 
277  if (fssrc->ac) {
279  memcpy(pdst->state, psrc->state, CONTEXT_SIZE * psrc->context_count);
280  } else {
281  pdst->vlc_state = av_malloc_array(sizeof(*pdst->vlc_state), psrc->context_count);
282  memcpy(pdst->vlc_state, psrc->vlc_state, sizeof(*pdst->vlc_state) * psrc->context_count);
283  }
284  }
285  }
286 
287  fs->slice_rct_by_coef = 1;
288  fs->slice_rct_ry_coef = 1;
289 
290  if (f->version > 2) {
291  if (ff_ffv1_init_slice_state(f, fs) < 0)
292  return AVERROR(ENOMEM);
293  if (decode_slice_header(f, fs) < 0) {
294  fs->slice_x = fs->slice_y = fs->slice_height = fs->slice_width = 0;
295  fs->slice_damaged = 1;
296  return AVERROR_INVALIDDATA;
297  }
298  }
299  if ((ret = ff_ffv1_init_slice_state(f, fs)) < 0)
300  return ret;
301  if (f->cur->key_frame || fs->slice_reset_contexts)
303 
304  width = fs->slice_width;
305  height = fs->slice_height;
306  x = fs->slice_x;
307  y = fs->slice_y;
308 
309  if (fs->ac == AC_GOLOMB_RICE) {
310  if (f->version == 3 && f->micro_version > 1 || f->version > 3)
311  get_rac(&fs->c, (uint8_t[]) { 129 });
312  fs->ac_byte_count = f->version > 2 || (!x && !y) ? fs->c.bytestream - fs->c.bytestream_start - 1 : 0;
313  init_get_bits(&fs->gb,
314  fs->c.bytestream_start + fs->ac_byte_count,
315  (fs->c.bytestream_end - fs->c.bytestream_start - fs->ac_byte_count) * 8);
316  }
317 
318  av_assert1(width && height);
319  if (f->colorspace == 0 && (f->chroma_planes || !fs->transparency)) {
320  const int chroma_width = AV_CEIL_RSHIFT(width, f->chroma_h_shift);
321  const int chroma_height = AV_CEIL_RSHIFT(height, f->chroma_v_shift);
322  const int cx = x >> f->chroma_h_shift;
323  const int cy = y >> f->chroma_v_shift;
324  decode_plane(fs, p->data[0] + ps*x + y*p->linesize[0], width, height, p->linesize[0], 0, 1);
325 
326  if (f->chroma_planes) {
327  decode_plane(fs, p->data[1] + ps*cx+cy*p->linesize[1], chroma_width, chroma_height, p->linesize[1], 1, 1);
328  decode_plane(fs, p->data[2] + ps*cx+cy*p->linesize[2], chroma_width, chroma_height, p->linesize[2], 1, 1);
329  }
330  if (fs->transparency)
331  decode_plane(fs, p->data[3] + ps*x + y*p->linesize[3], width, height, p->linesize[3], (f->version >= 4 && !f->chroma_planes) ? 1 : 2, 1);
332  } else if (f->colorspace == 0) {
333  decode_plane(fs, p->data[0] + ps*x + y*p->linesize[0] , width, height, p->linesize[0], 0, 2);
334  decode_plane(fs, p->data[0] + ps*x + y*p->linesize[0] + 1, width, height, p->linesize[0], 1, 2);
335  } else if (f->use32bit) {
336  uint8_t *planes[4] = { p->data[0] + ps * x + y * p->linesize[0],
337  p->data[1] + ps * x + y * p->linesize[1],
338  p->data[2] + ps * x + y * p->linesize[2],
339  p->data[3] + ps * x + y * p->linesize[3] };
340  decode_rgb_frame32(fs, planes, width, height, p->linesize);
341  } else {
342  uint8_t *planes[4] = { p->data[0] + ps * x + y * p->linesize[0],
343  p->data[1] + ps * x + y * p->linesize[1],
344  p->data[2] + ps * x + y * p->linesize[2],
345  p->data[3] + ps * x + y * p->linesize[3] };
346  decode_rgb_frame(fs, planes, width, height, p->linesize);
347  }
348  if (fs->ac != AC_GOLOMB_RICE && f->version > 2) {
349  int v;
350  get_rac(&fs->c, (uint8_t[]) { 129 });
351  v = fs->c.bytestream_end - fs->c.bytestream - 2 - 5*f->ec;
352  if (v) {
353  av_log(f->avctx, AV_LOG_ERROR, "bytestream end mismatching by %d\n", v);
354  fs->slice_damaged = 1;
355  }
356  }
357 
358  emms_c();
359 
361 
362  return 0;
363 }
364 
365 static int read_quant_table(RangeCoder *c, int16_t *quant_table, int scale)
366 {
367  int v;
368  int i = 0;
370 
371  memset(state, 128, sizeof(state));
372 
373  for (v = 0; i < 128; v++) {
374  unsigned len = get_symbol(c, state, 0) + 1U;
375 
376  if (len > 128 - i || !len)
377  return AVERROR_INVALIDDATA;
378 
379  while (len--) {
380  quant_table[i] = scale * v;
381  i++;
382  }
383  }
384 
385  for (i = 1; i < 128; i++)
386  quant_table[256 - i] = -quant_table[i];
387  quant_table[128] = -quant_table[127];
388 
389  return 2 * v - 1;
390 }
391 
393  int16_t quant_table[MAX_CONTEXT_INPUTS][256])
394 {
395  int i;
396  int context_count = 1;
397 
398  for (i = 0; i < 5; i++) {
399  int ret = read_quant_table(c, quant_table[i], context_count);
400  if (ret < 0)
401  return ret;
402  context_count *= ret;
403  if (context_count > 32768U) {
404  return AVERROR_INVALIDDATA;
405  }
406  }
407  return (context_count + 1) / 2;
408 }
409 
411 {
412  RangeCoder *const c = &f->c;
414  int i, j, k, ret;
415  uint8_t state2[32][CONTEXT_SIZE];
416  unsigned crc = 0;
417 
418  memset(state2, 128, sizeof(state2));
419  memset(state, 128, sizeof(state));
420 
422  ff_build_rac_states(c, 0.05 * (1LL << 32), 256 - 8);
423 
424  f->version = get_symbol(c, state, 0);
425  if (f->version < 2) {
426  av_log(f->avctx, AV_LOG_ERROR, "Invalid version in global header\n");
427  return AVERROR_INVALIDDATA;
428  }
429  if (f->version > 2) {
430  c->bytestream_end -= 4;
431  f->micro_version = get_symbol(c, state, 0);
432  if (f->micro_version < 0)
433  return AVERROR_INVALIDDATA;
434  }
435  f->ac = get_symbol(c, state, 0);
436 
437  if (f->ac == AC_RANGE_CUSTOM_TAB) {
438  for (i = 1; i < 256; i++)
439  f->state_transition[i] = get_symbol(c, state, 1) + c->one_state[i];
440  }
441 
442  f->colorspace = get_symbol(c, state, 0); //YUV cs type
443  f->avctx->bits_per_raw_sample = get_symbol(c, state, 0);
444  f->chroma_planes = get_rac(c, state);
445  f->chroma_h_shift = get_symbol(c, state, 0);
446  f->chroma_v_shift = get_symbol(c, state, 0);
447  f->transparency = get_rac(c, state);
448  f->plane_count = 1 + (f->chroma_planes || f->version<4) + f->transparency;
449  f->num_h_slices = 1 + get_symbol(c, state, 0);
450  f->num_v_slices = 1 + get_symbol(c, state, 0);
451 
452  if (f->chroma_h_shift > 4U || f->chroma_v_shift > 4U) {
453  av_log(f->avctx, AV_LOG_ERROR, "chroma shift parameters %d %d are invalid\n",
455  return AVERROR_INVALIDDATA;
456  }
457 
458  if (f->num_h_slices > (unsigned)f->width || !f->num_h_slices ||
459  f->num_v_slices > (unsigned)f->height || !f->num_v_slices
460  ) {
461  av_log(f->avctx, AV_LOG_ERROR, "slice count invalid\n");
462  return AVERROR_INVALIDDATA;
463  }
464 
465  f->quant_table_count = get_symbol(c, state, 0);
466  if (f->quant_table_count > (unsigned)MAX_QUANT_TABLES || !f->quant_table_count) {
467  av_log(f->avctx, AV_LOG_ERROR, "quant table count %d is invalid\n", f->quant_table_count);
468  f->quant_table_count = 0;
469  return AVERROR_INVALIDDATA;
470  }
471 
472  for (i = 0; i < f->quant_table_count; i++) {
474  if (f->context_count[i] < 0) {
475  av_log(f->avctx, AV_LOG_ERROR, "read_quant_table error\n");
476  return AVERROR_INVALIDDATA;
477  }
478  }
479  if ((ret = ff_ffv1_allocate_initial_states(f)) < 0)
480  return ret;
481 
482  for (i = 0; i < f->quant_table_count; i++)
483  if (get_rac(c, state)) {
484  for (j = 0; j < f->context_count[i]; j++)
485  for (k = 0; k < CONTEXT_SIZE; k++) {
486  int pred = j ? f->initial_states[i][j - 1][k] : 128;
487  f->initial_states[i][j][k] =
488  (pred + get_symbol(c, state2[k], 1)) & 0xFF;
489  }
490  }
491 
492  if (f->version > 2) {
493  f->ec = get_symbol(c, state, 0);
494  if (f->micro_version > 2)
495  f->intra = get_symbol(c, state, 0);
496  }
497 
498  if (f->version > 2) {
499  unsigned v;
502  if (v || f->avctx->extradata_size < 4) {
503  av_log(f->avctx, AV_LOG_ERROR, "CRC mismatch %X!\n", v);
504  return AVERROR_INVALIDDATA;
505  }
506  crc = AV_RB32(f->avctx->extradata + f->avctx->extradata_size - 4);
507  }
508 
509  if (f->avctx->debug & FF_DEBUG_PICT_INFO)
511  "global: ver:%d.%d, coder:%d, colorspace: %d bpr:%d chroma:%d(%d:%d), alpha:%d slices:%dx%d qtabs:%d ec:%d intra:%d CRC:0x%08X\n",
512  f->version, f->micro_version,
513  f->ac,
514  f->colorspace,
517  f->transparency,
518  f->num_h_slices, f->num_v_slices,
520  f->ec,
521  f->intra,
522  crc
523  );
524  return 0;
525 }
526 
528 {
530  int i, j, context_count = -1; //-1 to avoid warning
531  RangeCoder *const c = &f->slice_context[0]->c;
532 
533  memset(state, 128, sizeof(state));
534 
535  if (f->version < 2) {
537  unsigned v= get_symbol(c, state, 0);
538  if (v >= 2) {
539  av_log(f->avctx, AV_LOG_ERROR, "invalid version %d in ver01 header\n", v);
540  return AVERROR_INVALIDDATA;
541  }
542  f->version = v;
543  f->ac = get_symbol(c, state, 0);
544 
545  if (f->ac == AC_RANGE_CUSTOM_TAB) {
546  for (i = 1; i < 256; i++) {
547  int st = get_symbol(c, state, 1) + c->one_state[i];
548  if (st < 1 || st > 255) {
549  av_log(f->avctx, AV_LOG_ERROR, "invalid state transition %d\n", st);
550  return AVERROR_INVALIDDATA;
551  }
552  f->state_transition[i] = st;
553  }
554  }
555 
556  colorspace = get_symbol(c, state, 0); //YUV cs type
557  bits_per_raw_sample = f->version > 0 ? get_symbol(c, state, 0) : f->avctx->bits_per_raw_sample;
558  chroma_planes = get_rac(c, state);
559  chroma_h_shift = get_symbol(c, state, 0);
560  chroma_v_shift = get_symbol(c, state, 0);
561  transparency = get_rac(c, state);
562  if (colorspace == 0 && f->avctx->skip_alpha)
563  transparency = 0;
564 
565  if (f->plane_count) {
566  if (colorspace != f->colorspace ||
567  bits_per_raw_sample != f->avctx->bits_per_raw_sample ||
568  chroma_planes != f->chroma_planes ||
569  chroma_h_shift != f->chroma_h_shift ||
570  chroma_v_shift != f->chroma_v_shift ||
571  transparency != f->transparency) {
572  av_log(f->avctx, AV_LOG_ERROR, "Invalid change of global parameters\n");
573  return AVERROR_INVALIDDATA;
574  }
575  }
576 
577  if (chroma_h_shift > 4U || chroma_v_shift > 4U) {
578  av_log(f->avctx, AV_LOG_ERROR, "chroma shift parameters %d %d are invalid\n",
579  chroma_h_shift, chroma_v_shift);
580  return AVERROR_INVALIDDATA;
581  }
582 
583  f->colorspace = colorspace;
589 
590  f->plane_count = 2 + f->transparency;
591  }
592 
593  if (f->colorspace == 0) {
594  if (!f->transparency && !f->chroma_planes) {
595  if (f->avctx->bits_per_raw_sample <= 8)
597  else if (f->avctx->bits_per_raw_sample == 9) {
598  f->packed_at_lsb = 1;
600  } else if (f->avctx->bits_per_raw_sample == 10) {
601  f->packed_at_lsb = 1;
603  } else if (f->avctx->bits_per_raw_sample == 12) {
604  f->packed_at_lsb = 1;
606  } else if (f->avctx->bits_per_raw_sample == 16) {
607  f->packed_at_lsb = 1;
609  } else if (f->avctx->bits_per_raw_sample < 16) {
611  } else
612  return AVERROR(ENOSYS);
613  } else if (f->transparency && !f->chroma_planes) {
614  if (f->avctx->bits_per_raw_sample <= 8)
616  else
617  return AVERROR(ENOSYS);
618  } else if (f->avctx->bits_per_raw_sample<=8 && !f->transparency) {
619  switch(16 * f->chroma_h_shift + f->chroma_v_shift) {
620  case 0x00: f->avctx->pix_fmt = AV_PIX_FMT_YUV444P; break;
621  case 0x01: f->avctx->pix_fmt = AV_PIX_FMT_YUV440P; break;
622  case 0x10: f->avctx->pix_fmt = AV_PIX_FMT_YUV422P; break;
623  case 0x11: f->avctx->pix_fmt = AV_PIX_FMT_YUV420P; break;
624  case 0x20: f->avctx->pix_fmt = AV_PIX_FMT_YUV411P; break;
625  case 0x22: f->avctx->pix_fmt = AV_PIX_FMT_YUV410P; break;
626  }
627  } else if (f->avctx->bits_per_raw_sample <= 8 && f->transparency) {
628  switch(16*f->chroma_h_shift + f->chroma_v_shift) {
629  case 0x00: f->avctx->pix_fmt = AV_PIX_FMT_YUVA444P; break;
630  case 0x10: f->avctx->pix_fmt = AV_PIX_FMT_YUVA422P; break;
631  case 0x11: f->avctx->pix_fmt = AV_PIX_FMT_YUVA420P; break;
632  }
633  } else if (f->avctx->bits_per_raw_sample == 9 && !f->transparency) {
634  f->packed_at_lsb = 1;
635  switch(16 * f->chroma_h_shift + f->chroma_v_shift) {
636  case 0x00: f->avctx->pix_fmt = AV_PIX_FMT_YUV444P9; break;
637  case 0x10: f->avctx->pix_fmt = AV_PIX_FMT_YUV422P9; break;
638  case 0x11: f->avctx->pix_fmt = AV_PIX_FMT_YUV420P9; break;
639  }
640  } else if (f->avctx->bits_per_raw_sample == 9 && f->transparency) {
641  f->packed_at_lsb = 1;
642  switch(16 * f->chroma_h_shift + f->chroma_v_shift) {
643  case 0x00: f->avctx->pix_fmt = AV_PIX_FMT_YUVA444P9; break;
644  case 0x10: f->avctx->pix_fmt = AV_PIX_FMT_YUVA422P9; break;
645  case 0x11: f->avctx->pix_fmt = AV_PIX_FMT_YUVA420P9; break;
646  }
647  } else if (f->avctx->bits_per_raw_sample == 10 && !f->transparency) {
648  f->packed_at_lsb = 1;
649  switch(16 * f->chroma_h_shift + f->chroma_v_shift) {
650  case 0x00: f->avctx->pix_fmt = AV_PIX_FMT_YUV444P10; break;
651  case 0x01: f->avctx->pix_fmt = AV_PIX_FMT_YUV440P10; break;
652  case 0x10: f->avctx->pix_fmt = AV_PIX_FMT_YUV422P10; break;
653  case 0x11: f->avctx->pix_fmt = AV_PIX_FMT_YUV420P10; break;
654  }
655  } else if (f->avctx->bits_per_raw_sample == 10 && f->transparency) {
656  f->packed_at_lsb = 1;
657  switch(16 * f->chroma_h_shift + f->chroma_v_shift) {
658  case 0x00: f->avctx->pix_fmt = AV_PIX_FMT_YUVA444P10; break;
659  case 0x10: f->avctx->pix_fmt = AV_PIX_FMT_YUVA422P10; break;
660  case 0x11: f->avctx->pix_fmt = AV_PIX_FMT_YUVA420P10; break;
661  }
662  } else if (f->avctx->bits_per_raw_sample == 12 && !f->transparency) {
663  f->packed_at_lsb = 1;
664  switch(16 * f->chroma_h_shift + f->chroma_v_shift) {
665  case 0x00: f->avctx->pix_fmt = AV_PIX_FMT_YUV444P12; break;
666  case 0x01: f->avctx->pix_fmt = AV_PIX_FMT_YUV440P12; break;
667  case 0x10: f->avctx->pix_fmt = AV_PIX_FMT_YUV422P12; break;
668  case 0x11: f->avctx->pix_fmt = AV_PIX_FMT_YUV420P12; break;
669  }
670  } else if (f->avctx->bits_per_raw_sample == 14 && !f->transparency) {
671  f->packed_at_lsb = 1;
672  switch(16 * f->chroma_h_shift + f->chroma_v_shift) {
673  case 0x00: f->avctx->pix_fmt = AV_PIX_FMT_YUV444P14; break;
674  case 0x10: f->avctx->pix_fmt = AV_PIX_FMT_YUV422P14; break;
675  case 0x11: f->avctx->pix_fmt = AV_PIX_FMT_YUV420P14; break;
676  }
677  } else if (f->avctx->bits_per_raw_sample == 16 && !f->transparency){
678  f->packed_at_lsb = 1;
679  switch(16 * f->chroma_h_shift + f->chroma_v_shift) {
680  case 0x00: f->avctx->pix_fmt = AV_PIX_FMT_YUV444P16; break;
681  case 0x10: f->avctx->pix_fmt = AV_PIX_FMT_YUV422P16; break;
682  case 0x11: f->avctx->pix_fmt = AV_PIX_FMT_YUV420P16; break;
683  }
684  } else if (f->avctx->bits_per_raw_sample == 16 && f->transparency){
685  f->packed_at_lsb = 1;
686  switch(16 * f->chroma_h_shift + f->chroma_v_shift) {
687  case 0x00: f->avctx->pix_fmt = AV_PIX_FMT_YUVA444P16; break;
688  case 0x10: f->avctx->pix_fmt = AV_PIX_FMT_YUVA422P16; break;
689  case 0x11: f->avctx->pix_fmt = AV_PIX_FMT_YUVA420P16; break;
690  }
691  }
692  } else if (f->colorspace == 1) {
693  if (f->chroma_h_shift || f->chroma_v_shift) {
695  "chroma subsampling not supported in this colorspace\n");
696  return AVERROR(ENOSYS);
697  }
698  if ( f->avctx->bits_per_raw_sample <= 8 && !f->transparency)
700  else if (f->avctx->bits_per_raw_sample <= 8 && f->transparency)
702  else if (f->avctx->bits_per_raw_sample == 9 && !f->transparency)
704  else if (f->avctx->bits_per_raw_sample == 10 && !f->transparency)
706  else if (f->avctx->bits_per_raw_sample == 10 && f->transparency)
708  else if (f->avctx->bits_per_raw_sample == 12 && !f->transparency)
710  else if (f->avctx->bits_per_raw_sample == 12 && f->transparency)
712  else if (f->avctx->bits_per_raw_sample == 14 && !f->transparency)
714  else if (f->avctx->bits_per_raw_sample == 16 && !f->transparency) {
716  f->use32bit = 1;
717  }
718  else if (f->avctx->bits_per_raw_sample == 16 && f->transparency) {
720  f->use32bit = 1;
721  }
722  } else {
723  av_log(f->avctx, AV_LOG_ERROR, "colorspace not supported\n");
724  return AVERROR(ENOSYS);
725  }
726  if (f->avctx->pix_fmt == AV_PIX_FMT_NONE) {
727  av_log(f->avctx, AV_LOG_ERROR, "format not supported\n");
728  return AVERROR(ENOSYS);
729  }
730 
731  ff_dlog(f->avctx, "%d %d %d\n",
733  if (f->version < 2) {
734  context_count = read_quant_tables(c, f->quant_table);
735  if (context_count < 0) {
736  av_log(f->avctx, AV_LOG_ERROR, "read_quant_table error\n");
737  return AVERROR_INVALIDDATA;
738  }
740  } else if (f->version < 3) {
741  f->slice_count = get_symbol(c, state, 0);
742  } else {
743  const uint8_t *p = c->bytestream_end;
744  for (f->slice_count = 0;
745  f->slice_count < MAX_SLICES && 3 + 5*!!f->ec < p - c->bytestream_start;
746  f->slice_count++) {
747  int trailer = 3 + 5*!!f->ec;
748  int size = AV_RB24(p-trailer);
749  if (size + trailer > p - c->bytestream_start)
750  break;
751  p -= size + trailer;
752  }
753  }
754  if (f->slice_count > (unsigned)MAX_SLICES || f->slice_count <= 0 || f->slice_count > f->max_slice_count) {
755  av_log(f->avctx, AV_LOG_ERROR, "slice count %d is invalid (max=%d)\n", f->slice_count, f->max_slice_count);
756  return AVERROR_INVALIDDATA;
757  }
758 
759  for (j = 0; j < f->slice_count; j++) {
760  FFV1Context *fs = f->slice_context[j];
761  fs->ac = f->ac;
762  fs->packed_at_lsb = f->packed_at_lsb;
763 
764  fs->slice_damaged = 0;
765 
766  if (f->version == 2) {
767  fs->slice_x = get_symbol(c, state, 0) * f->width ;
768  fs->slice_y = get_symbol(c, state, 0) * f->height;
769  fs->slice_width = (get_symbol(c, state, 0) + 1) * f->width + fs->slice_x;
770  fs->slice_height = (get_symbol(c, state, 0) + 1) * f->height + fs->slice_y;
771 
772  fs->slice_x /= f->num_h_slices;
773  fs->slice_y /= f->num_v_slices;
774  fs->slice_width = fs->slice_width / f->num_h_slices - fs->slice_x;
775  fs->slice_height = fs->slice_height / f->num_v_slices - fs->slice_y;
776  if ((unsigned)fs->slice_width > f->width ||
777  (unsigned)fs->slice_height > f->height)
778  return AVERROR_INVALIDDATA;
779  if ( (unsigned)fs->slice_x + (uint64_t)fs->slice_width > f->width
780  || (unsigned)fs->slice_y + (uint64_t)fs->slice_height > f->height)
781  return AVERROR_INVALIDDATA;
782  }
783 
784  for (i = 0; i < f->plane_count; i++) {
785  PlaneContext *const p = &fs->plane[i];
786 
787  if (f->version == 2) {
788  int idx = get_symbol(c, state, 0);
789  if (idx > (unsigned)f->quant_table_count) {
791  "quant_table_index out of range\n");
792  return AVERROR_INVALIDDATA;
793  }
794  p->quant_table_index = idx;
795  memcpy(p->quant_table, f->quant_tables[idx],
796  sizeof(p->quant_table));
797  context_count = f->context_count[idx];
798  } else {
799  memcpy(p->quant_table, f->quant_table, sizeof(p->quant_table));
800  }
801 
802  if (f->version <= 2) {
803  av_assert0(context_count >= 0);
804  if (p->context_count < context_count) {
805  av_freep(&p->state);
806  av_freep(&p->vlc_state);
807  }
809  }
810  }
811  }
812  return 0;
813 }
814 
816 {
817  FFV1Context *f = avctx->priv_data;
818  int ret;
819 
820  if ((ret = ff_ffv1_common_init(avctx)) < 0)
821  return ret;
822 
823  if (avctx->extradata_size > 0 && (ret = read_extra_header(f)) < 0)
824  return ret;
825 
826  if ((ret = ff_ffv1_init_slice_contexts(f)) < 0)
827  return ret;
828 
829  return 0;
830 }
831 
832 static int decode_frame(AVCodecContext *avctx, void *data, int *got_frame, AVPacket *avpkt)
833 {
834  uint8_t *buf = avpkt->data;
835  int buf_size = avpkt->size;
836  FFV1Context *f = avctx->priv_data;
837  RangeCoder *const c = &f->slice_context[0]->c;
838  int i, ret;
839  uint8_t keystate = 128;
840  uint8_t *buf_p;
841  AVFrame *p;
842 
843  if (f->last_picture.f)
846 
847  f->cur = p = f->picture.f;
848 
849  if (f->version < 3 && avctx->field_order > AV_FIELD_PROGRESSIVE) {
850  /* we have interlaced material flagged in container */
851  p->interlaced_frame = 1;
852  if (avctx->field_order == AV_FIELD_TT || avctx->field_order == AV_FIELD_TB)
853  p->top_field_first = 1;
854  }
855 
856  f->avctx = avctx;
857  ff_init_range_decoder(c, buf, buf_size);
858  ff_build_rac_states(c, 0.05 * (1LL << 32), 256 - 8);
859 
860  p->pict_type = AV_PICTURE_TYPE_I; //FIXME I vs. P
861  if (get_rac(c, &keystate)) {
862  p->key_frame = 1;
863  f->key_frame_ok = 0;
864  if ((ret = read_header(f)) < 0)
865  return ret;
866  f->key_frame_ok = 1;
867  } else {
868  if (!f->key_frame_ok) {
869  av_log(avctx, AV_LOG_ERROR,
870  "Cannot decode non-keyframe without valid keyframe\n");
871  return AVERROR_INVALIDDATA;
872  }
873  p->key_frame = 0;
874  }
875 
876  if ((ret = ff_thread_get_buffer(avctx, &f->picture, AV_GET_BUFFER_FLAG_REF)) < 0)
877  return ret;
878 
879  if (avctx->debug & FF_DEBUG_PICT_INFO)
880  av_log(avctx, AV_LOG_DEBUG, "ver:%d keyframe:%d coder:%d ec:%d slices:%d bps:%d\n",
881  f->version, p->key_frame, f->ac, f->ec, f->slice_count, f->avctx->bits_per_raw_sample);
882 
883  ff_thread_finish_setup(avctx);
884 
885  buf_p = buf + buf_size;
886  for (i = f->slice_count - 1; i >= 0; i--) {
887  FFV1Context *fs = f->slice_context[i];
888  int trailer = 3 + 5*!!f->ec;
889  int v;
890 
891  if (i || f->version > 2) v = AV_RB24(buf_p-trailer) + trailer;
892  else v = buf_p - c->bytestream_start;
893  if (buf_p - c->bytestream_start < v) {
894  av_log(avctx, AV_LOG_ERROR, "Slice pointer chain broken\n");
895  ff_thread_report_progress(&f->picture, INT_MAX, 0);
896  return AVERROR_INVALIDDATA;
897  }
898  buf_p -= v;
899 
900  if (f->ec) {
901  unsigned crc = av_crc(av_crc_get_table(AV_CRC_32_IEEE), 0, buf_p, v);
902  if (crc) {
903  int64_t ts = avpkt->pts != AV_NOPTS_VALUE ? avpkt->pts : avpkt->dts;
904  av_log(f->avctx, AV_LOG_ERROR, "slice CRC mismatch %X!", crc);
905  if (ts != AV_NOPTS_VALUE && avctx->pkt_timebase.num) {
906  av_log(f->avctx, AV_LOG_ERROR, "at %f seconds\n", ts*av_q2d(avctx->pkt_timebase));
907  } else if (ts != AV_NOPTS_VALUE) {
908  av_log(f->avctx, AV_LOG_ERROR, "at %"PRId64"\n", ts);
909  } else {
910  av_log(f->avctx, AV_LOG_ERROR, "\n");
911  }
912  fs->slice_damaged = 1;
913  }
914  if (avctx->debug & FF_DEBUG_PICT_INFO) {
915  av_log(avctx, AV_LOG_DEBUG, "slice %d, CRC: 0x%08"PRIX32"\n", i, AV_RB32(buf_p + v - 4));
916  }
917  }
918 
919  if (i) {
920  ff_init_range_decoder(&fs->c, buf_p, v);
921  } else
922  fs->c.bytestream_end = buf_p + v;
923 
924  fs->avctx = avctx;
925  fs->cur = p;
926  }
927 
928  avctx->execute(avctx,
929  decode_slice,
930  &f->slice_context[0],
931  NULL,
932  f->slice_count,
933  sizeof(void*));
934 
935  for (i = f->slice_count - 1; i >= 0; i--) {
936  FFV1Context *fs = f->slice_context[i];
937  int j;
938  if (fs->slice_damaged && f->last_picture.f->data[0]) {
940  const uint8_t *src[4];
941  uint8_t *dst[4];
942  ff_thread_await_progress(&f->last_picture, INT_MAX, 0);
943  for (j = 0; j < desc->nb_components; j++) {
944  int pixshift = desc->comp[j].depth > 8;
945  int sh = (j == 1 || j == 2) ? f->chroma_h_shift : 0;
946  int sv = (j == 1 || j == 2) ? f->chroma_v_shift : 0;
947  dst[j] = p->data[j] + p->linesize[j] *
948  (fs->slice_y >> sv) + ((fs->slice_x >> sh) << pixshift);
949  src[j] = f->last_picture.f->data[j] + f->last_picture.f->linesize[j] *
950  (fs->slice_y >> sv) + ((fs->slice_x >> sh) << pixshift);
951 
952  }
953  if (desc->flags & AV_PIX_FMT_FLAG_PAL ||
954  desc->flags & FF_PSEUDOPAL) {
955  dst[1] = p->data[1];
956  src[1] = f->last_picture.f->data[1];
957  }
958  av_image_copy(dst, p->linesize, src,
959  f->last_picture.f->linesize,
960  avctx->pix_fmt,
961  fs->slice_width,
962  fs->slice_height);
963  }
964  }
965  ff_thread_report_progress(&f->picture, INT_MAX, 0);
966 
967  f->picture_number++;
968 
969  if (f->last_picture.f)
971  f->cur = NULL;
972  if ((ret = av_frame_ref(data, f->picture.f)) < 0)
973  return ret;
974 
975  *got_frame = 1;
976 
977  return buf_size;
978 }
979 
980 static void copy_fields(FFV1Context *fsdst, FFV1Context *fssrc, FFV1Context *fsrc)
981 {
982  fsdst->version = fsrc->version;
983  fsdst->micro_version = fsrc->micro_version;
984  fsdst->chroma_planes = fsrc->chroma_planes;
985  fsdst->chroma_h_shift = fsrc->chroma_h_shift;
986  fsdst->chroma_v_shift = fsrc->chroma_v_shift;
987  fsdst->transparency = fsrc->transparency;
988  fsdst->plane_count = fsrc->plane_count;
989  fsdst->ac = fsrc->ac;
990  fsdst->colorspace = fsrc->colorspace;
991 
992  fsdst->ec = fsrc->ec;
993  fsdst->intra = fsrc->intra;
994  fsdst->slice_damaged = fssrc->slice_damaged;
995  fsdst->key_frame_ok = fsrc->key_frame_ok;
996 
998  fsdst->packed_at_lsb = fsrc->packed_at_lsb;
999  fsdst->slice_count = fsrc->slice_count;
1000  if (fsrc->version<3){
1001  fsdst->slice_x = fssrc->slice_x;
1002  fsdst->slice_y = fssrc->slice_y;
1003  fsdst->slice_width = fssrc->slice_width;
1004  fsdst->slice_height = fssrc->slice_height;
1005  }
1006 }
1007 
1008 #if HAVE_THREADS
1009 static int update_thread_context(AVCodecContext *dst, const AVCodecContext *src)
1010 {
1011  FFV1Context *fsrc = src->priv_data;
1012  FFV1Context *fdst = dst->priv_data;
1013  int i, ret;
1014 
1015  if (dst == src)
1016  return 0;
1017 
1018  {
1022  memcpy(initial_states, fdst->initial_states, sizeof(fdst->initial_states));
1023  memcpy(slice_context, fdst->slice_context , sizeof(fdst->slice_context));
1024 
1025  memcpy(fdst, fsrc, sizeof(*fdst));
1026  memcpy(fdst->initial_states, initial_states, sizeof(fdst->initial_states));
1027  memcpy(fdst->slice_context, slice_context , sizeof(fdst->slice_context));
1028  fdst->picture = picture;
1029  fdst->last_picture = last_picture;
1030  for (i = 0; i<fdst->num_h_slices * fdst->num_v_slices; i++) {
1031  FFV1Context *fssrc = fsrc->slice_context[i];
1032  FFV1Context *fsdst = fdst->slice_context[i];
1033  copy_fields(fsdst, fssrc, fsrc);
1034  }
1035  av_assert0(!fdst->plane[0].state);
1036  av_assert0(!fdst->sample_buffer);
1037  }
1038 
1039  av_assert1(fdst->max_slice_count == fsrc->max_slice_count);
1040 
1041 
1042  ff_thread_release_buffer(dst, &fdst->picture);
1043  if (fsrc->picture.f->data[0]) {
1044  if ((ret = ff_thread_ref_frame(&fdst->picture, &fsrc->picture)) < 0)
1045  return ret;
1046  }
1047 
1048  fdst->fsrc = fsrc;
1049 
1050  return 0;
1051 }
1052 #endif
1053 
1055  .name = "ffv1",
1056  .long_name = NULL_IF_CONFIG_SMALL("FFmpeg video codec #1"),
1057  .type = AVMEDIA_TYPE_VIDEO,
1058  .id = AV_CODEC_ID_FFV1,
1059  .priv_data_size = sizeof(FFV1Context),
1060  .init = decode_init,
1061  .close = ff_ffv1_close,
1062  .decode = decode_frame,
1064  .capabilities = AV_CODEC_CAP_DR1 /*| AV_CODEC_CAP_DRAW_HORIZ_BAND*/ |
1067 };
#define AV_PIX_FMT_FLAG_PAL
Pixel format has a palette in data[1], values are indexes in this palette.
Definition: pixdesc.h:132
#define FF_CODEC_CAP_INIT_CLEANUP
The codec allows calling the close function for deallocation even if the init function returned a fai...
Definition: internal.h:48
static av_always_inline int fold(int diff, int bits)
Definition: ffv1.h:150
#define NULL
Definition: coverity.c:32
#define AV_PIX_FMT_YUVA422P16
Definition: pixfmt.h:442
#define AVERROR_INVALIDDATA
Invalid data found when processing input.
Definition: error.h:59
#define AV_PIX_FMT_YUV440P10
Definition: pixfmt.h:401
#define AV_PIX_FMT_YUVA422P9
Definition: pixfmt.h:434
const AVPixFmtDescriptor * av_pix_fmt_desc_get(enum AVPixelFormat pix_fmt)
Definition: pixdesc.c:2573
This structure describes decoded (raw) audio or video data.
Definition: frame.h:308
ptrdiff_t const GLvoid * data
Definition: opengl_enc.c:100
#define AV_PIX_FMT_YUVA420P10
Definition: pixfmt.h:436
#define AV_PIX_FMT_YUV444P14
Definition: pixfmt.h:409
8 bits gray, 8 bits alpha
Definition: pixfmt.h:143
#define AV_PIX_FMT_GBRAP10
Definition: pixfmt.h:419
#define AV_PIX_FMT_YUVA422P10
Definition: pixfmt.h:437
planar YUV 4:4:4, 24bpp, (1 Cr & Cb sample per 1x1 Y samples)
Definition: pixfmt.h:71
misc image utilities
#define AV_LOG_WARNING
Something somehow does not look correct.
Definition: log.h:200
AVFrame * f
Definition: thread.h:35
int16_t quant_table[MAX_CONTEXT_INPUTS][256]
Definition: ffv1.h:68
int quant_table_count
Definition: ffv1.h:125
else temp
Definition: vf_mcdeint.c:256
const char * desc
Definition: nvenc.c:87
static av_cold int init(AVCodecContext *avctx)
Definition: avrndec.c:35
static int decode_slice(AVCodecContext *c, void *arg)
Definition: ffv1dec.c:243
int slice_height
Definition: ffv1.h:133
#define MAX_CONTEXT_INPUTS
Definition: ffv1.h:53
int16_t * sample_buffer
Definition: ffv1.h:110
int version
Definition: ffv1.h:86
int micro_version
Definition: ffv1.h:87
Range coder.
uint8_t * bytestream_end
Definition: rangecoder.h:44
int num
Numerator.
Definition: rational.h:59
int size
Definition: packet.h:356
#define AV_PIX_FMT_GBRP10
Definition: pixfmt.h:415
static int read_quant_table(RangeCoder *c, int16_t *quant_table, int scale)
Definition: ffv1dec.c:365
static av_flatten int get_symbol_inline(RangeCoder *c, uint8_t *state, int is_signed)
Definition: ffv1dec.c:41
The reader does not expect b to be semantically here and if the code is changed by maybe adding a a division or other the signedness will almost certainly be mistaken To avoid this confusion a new type was SUINT is the C unsigned type but it holds a signed int to use the same example SUINT a
Definition: undefined.txt:36
enum AVPixelFormat pix_fmt
Pixel format, see AV_PIX_FMT_xxx.
Definition: avcodec.h:736
#define AV_PIX_FMT_GRAY9
Definition: pixfmt.h:379
#define AV_PIX_FMT_YUV420P12
Definition: pixfmt.h:403
static int decode_frame(AVCodecContext *avctx, void *data, int *got_frame, AVPacket *avpkt)
Definition: ffv1dec.c:832
int bits_per_raw_sample
Bits per sample/pixel of internal libavcodec pixel/sample format.
Definition: avcodec.h:1757
FF Video Codec 1 (a lossless codec)
the pkt_dts and pkt_pts fields in AVFrame will work as usual Restrictions on codec whose streams don t reset across will not work because their bitstreams cannot be decoded in parallel *The contents of buffers must not be read before ff_thread_await_progress() has been called on them.reget_buffer() and buffer age optimizations no longer work.*The contents of buffers must not be written to after ff_thread_report_progress() has been called on them.This includes draw_edges().Porting codecs to frame threading
#define sample
int height
Definition: ffv1.h:88
AVCodec.
Definition: codec.h:190
static void decode(AVCodecContext *dec_ctx, AVPacket *pkt, AVFrame *frame, FILE *outfile)
Definition: decode_audio.c:71
uint8_t one_state[256]
Definition: rangecoder.h:41
int slice_reset_contexts
Definition: ffv1.h:136
enum AVPictureType last_picture
Definition: movenc.c:68
int slice_rct_by_coef
Definition: ffv1.h:138
static struct @315 state
#define AV_PIX_FMT_GRAY10
Definition: pixfmt.h:380
int plane_count
Definition: ffv1.h:99
int slice_damaged
Definition: ffv1.h:117
static int is_input_end(FFV1Context *s)
Definition: ffv1dec.c:95
#define AV_PIX_FMT_GRAY12
Definition: pixfmt.h:381
ThreadFrame picture
Definition: ffv1.h:95
#define av_assert0(cond)
assert() equivalent, that is always enabled.
Definition: avassert.h:37
planar YUV 4:2:0, 20bpp, (1 Cr & Cb sample per 2x2 Y & A samples)
Definition: pixfmt.h:101
static int read_quant_tables(RangeCoder *c, int16_t quant_table[MAX_CONTEXT_INPUTS][256])
Definition: ffv1dec.c:392
AVComponentDescriptor comp[4]
Parameters that describe how pixels are packed.
Definition: pixdesc.h:117
uint8_t
#define av_cold
Definition: attributes.h:88
static int get_rac(RangeCoder *c, uint8_t *const state)
Definition: rangecoder.h:136
#define fs(width, name, subs,...)
Definition: cbs_vp9.c:259
AVOptions.
#define FF_DEBUG_PICT_INFO
Definition: avcodec.h:1612
int8_t bias
Definition: ffv1.h:63
#define f(width, name)
Definition: cbs_vp9.c:255
Undefined Behavior In the C some operations are like signed integer dereferencing freed accessing outside allocated Undefined Behavior must not occur in a C it is not safe even if the output of undefined operations is unused The unsafety may seem nit picking but Optimizing compilers have in fact optimized code on the assumption that no undefined Behavior occurs Optimizing code based on wrong assumptions can and has in some cases lead to effects beyond the output of computations The signed integer overflow problem in speed critical code Code which is highly optimized and works with signed integers sometimes has the problem that often the output of the computation does not c
Definition: undefined.txt:32
RangeCoder c
Definition: ffv1.h:81
int av_frame_ref(AVFrame *dst, const AVFrame *src)
Set up a new reference to the data described by the source frame.
Definition: frame.c:444
av_cold int ff_ffv1_common_init(AVCodecContext *avctx)
Definition: ffv1.c:41
uint8_t * extradata
some codecs need / can use extradata like Huffman tables.
Definition: avcodec.h:627
#define AV_PIX_FMT_YUVA420P9
Definition: pixfmt.h:433
uint64_t_TMPL AV_WL64 unsigned int_TMPL AV_WL32 unsigned int_TMPL AV_WL24 unsigned int_TMPL AV_WL16 uint64_t_TMPL AV_WB64 unsigned int_TMPL AV_RB32
Definition: bytestream.h:87
#define AV_PIX_FMT_GBRP9
Definition: pixfmt.h:414
int slice_y
Definition: ffv1.h:135
uint8_t(*[MAX_QUANT_TABLES] initial_states)[32]
Definition: ffv1.h:107
ThreadFrame last_picture
Definition: ffv1.h:95
Public header for CRC hash function implementation.
av_cold int ff_ffv1_close(AVCodecContext *avctx)
Definition: ffv1.c:209
int av_image_check_sar(unsigned int w, unsigned int h, AVRational sar)
Check if the given sample aspect ratio of an image is valid.
Definition: imgutils.c:287
#define height
uint8_t * data
Definition: packet.h:355
static double av_q2d(AVRational a)
Convert an AVRational to a double.
Definition: rational.h:104
uint8_t count
Definition: ffv1.h:64
int ff_thread_ref_frame(ThreadFrame *dst, ThreadFrame *src)
Definition: utils.c:1849
#define ff_dlog(a,...)
bitstream reader API header.
#define AV_PIX_FMT_YUV444P16
Definition: pixfmt.h:412
int interlaced_frame
The content of the picture is interlaced.
Definition: frame.h:455
VlcState * vlc_state
Definition: ffv1.h:72
ptrdiff_t size
Definition: opengl_enc.c:100
#define AV_PIX_FMT_YUV422P12
Definition: pixfmt.h:404
#define AV_PIX_FMT_YUVA420P16
Definition: pixfmt.h:441
#define av_log(a,...)
#define FF_CODEC_CAP_ALLOCATE_PROGRESS
Definition: internal.h:75
int bits_per_raw_sample
Definition: ffv1.h:121
int slice_width
Definition: ffv1.h:132
GetBitContext gb
Definition: ffv1.h:82
#define U(x)
Definition: vp56_arith.h:37
#define src
Definition: vp8dsp.c:254
AVFrame * cur
Definition: ffv1.h:98
AVRational pkt_timebase
Timebase in which pkt_dts/pts and AVPacket.dts/pts are.
Definition: avcodec.h:2083
static int get_bits_left(GetBitContext *gb)
Definition: get_bits.h:849
planar YUV 4:2:2 24bpp, (1 Cr & Cb sample per 2x1 Y & A samples)
Definition: pixfmt.h:176
#define AV_LOG_ERROR
Something went wrong and cannot losslessly be recovered.
Definition: log.h:194
static int decode_slice_header(FFV1Context *f, FFV1Context *fs)
Definition: ffv1dec.c:164
void ff_thread_release_buffer(AVCodecContext *avctx, ThreadFrame *f)
Wrapper around release_buffer() frame-for multithreaded codecs.
int16_t quant_tables[MAX_QUANT_TABLES][MAX_CONTEXT_INPUTS][256]
Definition: ffv1.h:104
int skip_alpha
Skip processing alpha if supported by codec.
Definition: avcodec.h:2142
#define NULL_IF_CONFIG_SMALL(x)
Return NULL if CONFIG_SMALL is true, otherwise the argument without modification. ...
Definition: internal.h:153
#define AV_LOG_DEBUG
Stuff which is only useful for libav* developers.
Definition: log.h:215
int context_count
Definition: ffv1.h:70
#define AV_PIX_FMT_YUVA444P16
Definition: pixfmt.h:443
const char * arg
Definition: jacosubdec.c:66
#define AV_PIX_FMT_GBRAP12
Definition: pixfmt.h:420
simple assert() macros that are a bit more flexible than ISO C assert().
const char * name
Name of the codec implementation.
Definition: codec.h:197
#define AV_PIX_FMT_YUV444P10
Definition: pixfmt.h:402
uint8_t bits
Definition: vp3data.h:202
int ff_ffv1_allocate_initial_states(FFV1Context *f)
Definition: ffv1.c:166
#define MAX_SLICES
Definition: dxva2_hevc.c:29
#define AV_CODEC_CAP_FRAME_THREADS
Codec supports frame-level multithreading.
Definition: codec.h:106
void av_image_copy(uint8_t *dst_data[4], int dst_linesizes[4], const uint8_t *src_data[4], const int src_linesizes[4], enum AVPixelFormat pix_fmt, int width, int height)
Copy image in src_data to dst_data.
Definition: imgutils.c:387
#define AV_PIX_FMT_GBRAP16
Definition: pixfmt.h:421
static int get_vlc_symbol(GetBitContext *gb, VlcState *const state, int bits)
Definition: ffv1dec.c:70
uint8_t * bytestream
Definition: rangecoder.h:43
planar YUV 4:2:2, 16bpp, (1 Cr & Cb sample per 2x1 Y samples)
Definition: pixfmt.h:70
#define ONLY_IF_THREADS_ENABLED(x)
Define a function with only the non-default version specified.
Definition: internal.h:192
int ac
1=range coder <-> 0=golomb rice
Definition: ffv1.h:100
the pkt_dts and pkt_pts fields in AVFrame will work as usual Restrictions on codec whose streams don t reset across will not work because their bitstreams cannot be decoded in parallel *The contents of buffers must not be read before as well as code calling up to before the decode process starts Call have so the codec calls ff_thread_report set FF_CODEC_CAP_ALLOCATE_PROGRESS in AVCodec caps_internal and use ff_thread_get_buffer() to allocate frames.The frames must then be freed with ff_thread_release_buffer().Otherwise decode directly into the user-supplied frames.Call ff_thread_report_progress() after some part of the current picture has decoded.A good place to put this is where draw_horiz_band() is called-add this if it isn't called anywhere
int16_t quant_table[MAX_CONTEXT_INPUTS][256]
Definition: ffv1.h:103
#define AC_RANGE_CUSTOM_TAB
Definition: ffv1.h:57
int run_index
Definition: ffv1.h:108
Definition: ffv1.h:60
uint64_t flags
Combination of AV_PIX_FMT_FLAG_...
Definition: pixdesc.h:106
#define AV_PIX_FMT_YUV422P9
Definition: pixfmt.h:397
#define av_flatten
Definition: attributes.h:94
static av_noinline int get_symbol(RangeCoder *c, uint8_t *state, int is_signed)
Definition: ffv1dec.c:65
uint8_t state_transition[256]
Definition: ffv1.h:106
uint8_t nb_components
The number of components each pixel has, (1-4)
Definition: pixdesc.h:83
static void copy_fields(FFV1Context *fsdst, FFV1Context *fssrc, FFV1Context *fsrc)
Definition: ffv1dec.c:980
enum AVPictureType pict_type
Picture type of the frame.
Definition: frame.h:391
#define AV_PIX_FMT_GBRP16
Definition: pixfmt.h:418
#define AV_PIX_FMT_GRAY16
Definition: pixfmt.h:383
#define av_assert1(cond)
assert() equivalent, that does not lie in speed critical code.
Definition: avassert.h:53
static int decode_plane(FFV1Context *s, uint8_t *src, int w, int h, int stride, int plane_index, int pixel_stride)
Definition: ffv1dec.c:118
#define FFMIN(a, b)
Definition: common.h:96
int num_h_slices
Definition: ffv1.h:131
#define width
the pkt_dts and pkt_pts fields in AVFrame will work as usual Restrictions on codec whose streams don t reset across will not work because their bitstreams cannot be decoded in parallel *The contents of buffers must not be read before as well as code calling up to before the decode process starts Call ff_thread_finish_setup() afterwards.If some code can't be moved
uint8_t w
Definition: llviddspenc.c:38
#define MAX_QUANT_TABLES
Definition: ffv1.h:52
int colorspace
Definition: ffv1.h:109
static float quant_table[96]
Definition: binkaudio.c:43
void ff_thread_report_progress(ThreadFrame *f, int n, int field)
Notify later decoding threads when part of their reference picture is ready.
static void update_vlc_state(VlcState *const state, const int v)
Definition: ffv1.h:161
uint32_t av_crc(const AVCRC *ctx, uint32_t crc, const uint8_t *buffer, size_t length)
Calculate the CRC of a block.
Definition: crc.c:392
int slice_count
Definition: ffv1.h:128
int max_slice_count
Definition: ffv1.h:129
void ff_build_rac_states(RangeCoder *c, int factor, int max_p)
Definition: rangecoder.c:68
#define s(width, name)
Definition: cbs_vp9.c:257
av_cold int ff_ffv1_init_slice_contexts(FFV1Context *f)
Definition: ffv1.c:116
av_cold int ff_ffv1_init_slice_state(FFV1Context *f, FFV1Context *fs)
Definition: ffv1.c:66
#define AV_PIX_FMT_YUVA444P10
Definition: pixfmt.h:438
int ac_byte_count
number of bytes used for AC coding
Definition: ffv1.h:101
int16_t drift
Definition: ffv1.h:61
int packed_at_lsb
Definition: ffv1.h:122
#define AV_PIX_FMT_YUV444P9
Definition: pixfmt.h:398
#define AV_PIX_FMT_GBRP14
Definition: pixfmt.h:417
static const struct @316 planes[]
static int read_header(FFV1Context *f)
Definition: ffv1dec.c:527
if(ret)
static const float pred[4]
Definition: siprdata.h:259
#define AV_PIX_FMT_YUV420P16
Definition: pixfmt.h:410
#define AV_CODEC_CAP_SLICE_THREADS
Codec supports slice-based (or partition-based) multithreading.
Definition: codec.h:110
#define AV_PIX_FMT_YUV420P14
Definition: pixfmt.h:407
int context_count[MAX_QUANT_TABLES]
Definition: ffv1.h:105
Libavcodec external API header.
uint64_t_TMPL AV_WL64 unsigned int_TMPL AV_WL32 unsigned int_TMPL AV_WL24 unsigned int_TMPL AV_WL16 uint64_t_TMPL AV_WB64 unsigned int_TMPL AV_WB32 unsigned int_TMPL AV_RB24
Definition: bytestream.h:87
int linesize[AV_NUM_DATA_POINTERS]
For video, size in bytes of each picture line.
Definition: frame.h:339
planar YUV 4:4:4 32bpp, (1 Cr & Cb sample per 1x1 Y & A samples)
Definition: pixfmt.h:177
int debug
debug
Definition: avcodec.h:1611
Descriptor that unambiguously describes how the bits of a pixel are stored in the up to 4 data planes...
Definition: pixdesc.h:81
main external API structure.
Definition: avcodec.h:526
#define AV_PIX_FMT_RGB32
Definition: pixfmt.h:372
int intra
Definition: ffv1.h:116
AVRational sample_aspect_ratio
Sample aspect ratio for the video frame, 0/1 if unknown/unspecified.
Definition: frame.h:396
the pkt_dts and pkt_pts fields in AVFrame will work as usual Restrictions on codec whose streams don t reset across will not work because their bitstreams cannot be decoded in parallel *The contents of buffers must not be read before as well as code calling up to before the decode process starts Call have update_thread_context() run it in the next thread.Add AV_CODEC_CAP_FRAME_THREADS to the codec capabilities.There will be very little speed gain at this point but it should work.If there are inter-frame dependencies
int extradata_size
Definition: avcodec.h:628
#define AV_PIX_FMT_YUV420P10
Definition: pixfmt.h:399
planar YUV 4:1:0, 9bpp, (1 Cr & Cb sample per 4x4 Y samples)
Definition: pixfmt.h:72
int use32bit
Definition: ffv1.h:113
Rational number (pair of numerator and denominator).
Definition: rational.h:58
av_cold void ff_init_range_decoder(RangeCoder *c, const uint8_t *buf, int buf_size)
Definition: rangecoder.c:53
#define AC_GOLOMB_RICE
Definition: ffv1.h:55
#define MAX_OVERREAD
Definition: lagarithrac.h:51
static int init_get_bits(GetBitContext *s, const uint8_t *buffer, int bit_size)
Initialize GetBitContext.
Definition: get_bits.h:659
#define AV_PIX_FMT_YUV440P12
Definition: pixfmt.h:405
int picture_number
Definition: ffv1.h:93
uint16_t error_sum
Definition: ffv1.h:62
#define AV_PIX_FMT_YUV420P9
Definition: pixfmt.h:396
int key_frame_ok
Definition: ffv1.h:118
#define AV_PIX_FMT_YUV422P14
Definition: pixfmt.h:408
#define AV_PIX_FMT_GBRP12
Definition: pixfmt.h:416
#define CONTEXT_SIZE
Definition: ffv1.h:50
#define AV_PIX_FMT_YUV422P10
Definition: pixfmt.h:400
int quant_table_index
Definition: ffv1.h:69
#define AV_PIX_FMT_YUV444P12
Definition: pixfmt.h:406
uint8_t * data[AV_NUM_DATA_POINTERS]
pointer to the picture/channel planes.
Definition: frame.h:322
const AVCRC * av_crc_get_table(AVCRCId crc_id)
Get an initialized standard CRC table.
Definition: crc.c:374
GLint GLenum GLboolean GLsizei stride
Definition: opengl_enc.c:104
planar YUV 4:2:0, 12bpp, (1 Cr & Cb sample per 2x2 Y samples)
Definition: pixfmt.h:66
Y , 8bpp.
Definition: pixfmt.h:74
common internal api header.
int overread
Definition: rangecoder.h:45
void ff_ffv1_clear_slice_state(FFV1Context *f, FFV1Context *fs)
Definition: ffv1.c:181
#define AV_PIX_FMT_YUVA444P9
Definition: pixfmt.h:435
uint8_t(* state)[CONTEXT_SIZE]
Definition: ffv1.h:71
planar YUV 4:1:1, 12bpp, (1 Cr & Cb sample per 4x1 Y samples)
Definition: pixfmt.h:73
int den
Denominator.
Definition: rational.h:60
int slice_coding_mode
Definition: ffv1.h:137
uint8_t * bytestream_start
Definition: rangecoder.h:42
static av_cold int decode_init(AVCodecContext *avctx)
Definition: ffv1dec.c:815
void * priv_data
Definition: avcodec.h:553
int chroma_h_shift
Definition: ffv1.h:90
PlaneContext plane[MAX_PLANES]
Definition: ffv1.h:102
#define FF_PSEUDOPAL
Definition: internal.h:335
int transparency
Definition: ffv1.h:91
#define av_free(p)
struct FFV1Context * fsrc
Definition: ffv1.h:96
int chroma_v_shift
Definition: ffv1.h:90
int top_field_first
If the content is interlaced, is top field displayed first.
Definition: frame.h:460
int len
int chroma_planes
Definition: ffv1.h:89
int key_frame
1 -> keyframe, 0-> not
Definition: frame.h:386
struct FFV1Context * slice_context[MAX_SLICES]
Definition: ffv1.h:127
int64_t dts
Decompression timestamp in AVStream->time_base units; the time at which the packet is decompressed...
Definition: packet.h:354
#define av_noinline
Definition: attributes.h:68
#define av_freep(p)
planar YUV 4:4:0 (1 Cr & Cb sample per 1x2 Y samples)
Definition: pixfmt.h:99
enum AVFieldOrder field_order
Field order.
Definition: avcodec.h:1183
#define av_malloc_array(a, b)
#define FFSWAP(type, a, b)
Definition: common.h:99
int ec
Definition: ffv1.h:115
Filter the word “frame” indicates either a video frame or a group of audio as stored in an AVFrame structure Format for each input and each output the list of supported formats For video that means pixel format For audio that means channel sample they are references to shared objects When the negotiation mechanism computes the intersection of the formats supported at each end of a all references to both lists are replaced with a reference to the intersection And when a single format is eventually chosen for a link amongst the remaining all references to the list are updated That means that if a filter requires that its input and output have the same format amongst a supported all it has to do is use a reference to the same list of formats query_formats can leave some formats unset and return AVERROR(EAGAIN) to cause the negotiation mechanism toagain later.That can be used by filters with complex requirements to use the format negotiated on one link to set the formats supported on another.Frame references ownership and permissions
int depth
Number of bits in the component.
Definition: pixdesc.h:58
static int get_sr_golomb(GetBitContext *gb, int k, int limit, int esc_len)
read signed golomb rice code (ffv1).
Definition: golomb.h:529
int num_v_slices
Definition: ffv1.h:130
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:1825
exp golomb vlc stuff
This structure stores compressed data.
Definition: packet.h:332
static int read_extra_header(FFV1Context *f)
Definition: ffv1dec.c:410
#define AV_GET_BUFFER_FLAG_REF
The decoder will keep a reference to the frame and may reuse it later.
Definition: avcodec.h:509
AVCodecContext * avctx
Definition: ffv1.h:80
#define AV_CODEC_CAP_DR1
Codec uses get_buffer() for allocating buffers and supports custom allocators.
Definition: codec.h:50
int slice_x
Definition: ffv1.h:134
#define AV_PIX_FMT_YUV422P16
Definition: pixfmt.h:411
int64_t pts
Presentation timestamp in AVStream->time_base units; the time at which the decompressed packet will b...
Definition: packet.h:348
int i
Definition: input.c:406
#define AV_NOPTS_VALUE
Undefined timestamp value.
Definition: avutil.h:248
AVCodec ff_ffv1_decoder
Definition: ffv1dec.c:1054
int step
Number of elements between 2 horizontally consecutive pixels.
Definition: pixdesc.h:41
int width
Definition: ffv1.h:88
#define AV_PIX_FMT_0RGB32
Definition: pixfmt.h:376
#define AV_CEIL_RSHIFT(a, b)
Definition: common.h:58
int slice_rct_ry_coef
Definition: ffv1.h:139