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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 "libavutil/timer.h"
34 #include "avcodec.h"
35 #include "internal.h"
36 #include "get_bits.h"
37 #include "rangecoder.h"
38 #include "golomb.h"
39 #include "mathops.h"
40 #include "ffv1.h"
41 
43  int is_signed)
44 {
45  if (get_rac(c, state + 0))
46  return 0;
47  else {
48  int i, e, 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 #if 0 // JPEG LS
87  if (k == 0 && 2 * state->drift <= -state->count)
88  v ^= (-1);
89 #else
90  v ^= ((2 * state->drift + state->count) >> 31);
91 #endif
92 
93  ret = fold(v + state->bias, bits);
94 
95  update_vlc_state(state, v);
96 
97  return ret;
98 }
99 
101  int16_t *sample[2],
102  int plane_index, int bits)
103 {
104  PlaneContext *const p = &s->plane[plane_index];
105  RangeCoder *const c = &s->c;
106  int x;
107  int run_count = 0;
108  int run_mode = 0;
109  int run_index = s->run_index;
110 
111  if (s->slice_coding_mode == 1) {
112  int i;
113  for (x = 0; x < w; x++) {
114  int v = 0;
115  for (i=0; i<bits; i++) {
116  uint8_t state = 128;
117  v += v + get_rac(c, &state);
118  }
119  sample[1][x] = v;
120  }
121  return;
122  }
123 
124  for (x = 0; x < w; x++) {
125  int diff, context, sign;
126 
127  context = get_context(p, sample[1] + x, sample[0] + x, sample[1] + x);
128  if (context < 0) {
129  context = -context;
130  sign = 1;
131  } else
132  sign = 0;
133 
134  av_assert2(context < p->context_count);
135 
136  if (s->ac != AC_GOLOMB_RICE) {
137  diff = get_symbol_inline(c, p->state[context], 1);
138  } else {
139  if (context == 0 && run_mode == 0)
140  run_mode = 1;
141 
142  if (run_mode) {
143  if (run_count == 0 && run_mode == 1) {
144  if (get_bits1(&s->gb)) {
145  run_count = 1 << ff_log2_run[run_index];
146  if (x + run_count <= w)
147  run_index++;
148  } else {
149  if (ff_log2_run[run_index])
150  run_count = get_bits(&s->gb, ff_log2_run[run_index]);
151  else
152  run_count = 0;
153  if (run_index)
154  run_index--;
155  run_mode = 2;
156  }
157  }
158  run_count--;
159  if (run_count < 0) {
160  run_mode = 0;
161  run_count = 0;
162  diff = get_vlc_symbol(&s->gb, &p->vlc_state[context],
163  bits);
164  if (diff >= 0)
165  diff++;
166  } else
167  diff = 0;
168  } else
169  diff = get_vlc_symbol(&s->gb, &p->vlc_state[context], bits);
170 
171  ff_dlog(s->avctx, "count:%d index:%d, mode:%d, x:%d pos:%d\n",
172  run_count, run_index, run_mode, x, get_bits_count(&s->gb));
173  }
174 
175  if (sign)
176  diff = -diff;
177 
178  sample[1][x] = av_mod_uintp2(predict(sample[1] + x, sample[0] + x) + diff, bits);
179  }
180  s->run_index = run_index;
181 }
182 
184  int w, int h, int stride, int plane_index,
185  int pixel_stride)
186 {
187  int x, y;
188  int16_t *sample[2];
189  sample[0] = s->sample_buffer + 3;
190  sample[1] = s->sample_buffer + w + 6 + 3;
191 
192  s->run_index = 0;
193 
194  memset(s->sample_buffer, 0, 2 * (w + 6) * sizeof(*s->sample_buffer));
195 
196  for (y = 0; y < h; y++) {
197  int16_t *temp = sample[0]; // FIXME: try a normal buffer
198 
199  sample[0] = sample[1];
200  sample[1] = temp;
201 
202  sample[1][-1] = sample[0][0];
203  sample[0][w] = sample[0][w - 1];
204 
205 // { START_TIMER
206  if (s->avctx->bits_per_raw_sample <= 8) {
207  decode_line(s, w, sample, plane_index, 8);
208  for (x = 0; x < w; x++)
209  src[x*pixel_stride + stride * y] = sample[1][x];
210  } else {
211  decode_line(s, w, sample, plane_index, s->avctx->bits_per_raw_sample);
212  if (s->packed_at_lsb) {
213  for (x = 0; x < w; x++) {
214  ((uint16_t*)(src + stride*y))[x*pixel_stride] = sample[1][x];
215  }
216  } else {
217  for (x = 0; x < w; x++) {
218  ((uint16_t*)(src + stride*y))[x*pixel_stride] = sample[1][x] << (16 - s->avctx->bits_per_raw_sample);
219  }
220  }
221  }
222 // STOP_TIMER("decode-line") }
223  }
224 }
225 
226 static void decode_rgb_frame(FFV1Context *s, uint8_t *src[3], int w, int h, int stride[3])
227 {
228  int x, y, p;
229  int16_t *sample[4][2];
230  int lbd = s->avctx->bits_per_raw_sample <= 8;
231  int bits = s->avctx->bits_per_raw_sample > 0 ? s->avctx->bits_per_raw_sample : 8;
232  int offset = 1 << bits;
233 
234  for (x = 0; x < 4; x++) {
235  sample[x][0] = s->sample_buffer + x * 2 * (w + 6) + 3;
236  sample[x][1] = s->sample_buffer + (x * 2 + 1) * (w + 6) + 3;
237  }
238 
239  s->run_index = 0;
240 
241  memset(s->sample_buffer, 0, 8 * (w + 6) * sizeof(*s->sample_buffer));
242 
243  for (y = 0; y < h; y++) {
244  for (p = 0; p < 3 + s->transparency; p++) {
245  int16_t *temp = sample[p][0]; // FIXME: try a normal buffer
246 
247  sample[p][0] = sample[p][1];
248  sample[p][1] = temp;
249 
250  sample[p][1][-1]= sample[p][0][0 ];
251  sample[p][0][ w]= sample[p][0][w-1];
252  if (lbd && s->slice_coding_mode == 0)
253  decode_line(s, w, sample[p], (p + 1)/2, 9);
254  else
255  decode_line(s, w, sample[p], (p + 1)/2, bits + (s->slice_coding_mode != 1));
256  }
257  for (x = 0; x < w; x++) {
258  int g = sample[0][1][x];
259  int b = sample[1][1][x];
260  int r = sample[2][1][x];
261  int a = sample[3][1][x];
262 
263  if (s->slice_coding_mode != 1) {
264  b -= offset;
265  r -= offset;
266  g -= (b * s->slice_rct_by_coef + r * s->slice_rct_ry_coef) >> 2;
267  b += g;
268  r += g;
269  }
270 
271  if (lbd)
272  *((uint32_t*)(src[0] + x*4 + stride[0]*y)) = b + (g<<8) + (r<<16) + (a<<24);
273  else {
274  *((uint16_t*)(src[0] + x*2 + stride[0]*y)) = b;
275  *((uint16_t*)(src[1] + x*2 + stride[1]*y)) = g;
276  *((uint16_t*)(src[2] + x*2 + stride[2]*y)) = r;
277  }
278  }
279  }
280 }
281 
283 {
284  RangeCoder *c = &fs->c;
286  unsigned ps, i, context_count;
287  memset(state, 128, sizeof(state));
288 
289  av_assert0(f->version > 2);
290 
291  fs->slice_x = get_symbol(c, state, 0) * f->width ;
292  fs->slice_y = get_symbol(c, state, 0) * f->height;
293  fs->slice_width = (get_symbol(c, state, 0) + 1) * f->width + fs->slice_x;
294  fs->slice_height = (get_symbol(c, state, 0) + 1) * f->height + fs->slice_y;
295 
296  fs->slice_x /= f->num_h_slices;
297  fs->slice_y /= f->num_v_slices;
298  fs->slice_width = fs->slice_width /f->num_h_slices - fs->slice_x;
299  fs->slice_height = fs->slice_height/f->num_v_slices - fs->slice_y;
300  if ((unsigned)fs->slice_width > f->width || (unsigned)fs->slice_height > f->height)
301  return -1;
302  if ( (unsigned)fs->slice_x + (uint64_t)fs->slice_width > f->width
303  || (unsigned)fs->slice_y + (uint64_t)fs->slice_height > f->height)
304  return -1;
305 
306  for (i = 0; i < f->plane_count; i++) {
307  PlaneContext * const p = &fs->plane[i];
308  int idx = get_symbol(c, state, 0);
309  if (idx >= (unsigned)f->quant_table_count) {
310  av_log(f->avctx, AV_LOG_ERROR, "quant_table_index out of range\n");
311  return -1;
312  }
313  p->quant_table_index = idx;
314  memcpy(p->quant_table, f->quant_tables[idx], sizeof(p->quant_table));
315  context_count = f->context_count[idx];
316 
317  if (p->context_count < context_count) {
318  av_freep(&p->state);
319  av_freep(&p->vlc_state);
320  }
322  }
323 
324  ps = get_symbol(c, state, 0);
325  if (ps == 1) {
326  f->cur->interlaced_frame = 1;
327  f->cur->top_field_first = 1;
328  } else if (ps == 2) {
329  f->cur->interlaced_frame = 1;
330  f->cur->top_field_first = 0;
331  } else if (ps == 3) {
332  f->cur->interlaced_frame = 0;
333  }
334  f->cur->sample_aspect_ratio.num = get_symbol(c, state, 0);
335  f->cur->sample_aspect_ratio.den = get_symbol(c, state, 0);
336 
337  if (av_image_check_sar(f->width, f->height,
338  f->cur->sample_aspect_ratio) < 0) {
339  av_log(f->avctx, AV_LOG_WARNING, "ignoring invalid SAR: %u/%u\n",
342  f->cur->sample_aspect_ratio = (AVRational){ 0, 1 };
343  }
344 
345  if (fs->version > 3) {
346  fs->slice_reset_contexts = get_rac(c, state);
347  fs->slice_coding_mode = get_symbol(c, state, 0);
348  if (fs->slice_coding_mode != 1) {
349  fs->slice_rct_by_coef = get_symbol(c, state, 0);
350  fs->slice_rct_ry_coef = get_symbol(c, state, 0);
351  if ((uint64_t)fs->slice_rct_by_coef + (uint64_t)fs->slice_rct_ry_coef > 4) {
352  av_log(f->avctx, AV_LOG_ERROR, "slice_rct_y_coef out of range\n");
353  return AVERROR_INVALIDDATA;
354  }
355  }
356  }
357 
358  return 0;
359 }
360 
361 static int decode_slice(AVCodecContext *c, void *arg)
362 {
363  FFV1Context *fs = *(void **)arg;
364  FFV1Context *f = fs->avctx->priv_data;
365  int width, height, x, y, ret;
366  const int ps = av_pix_fmt_desc_get(c->pix_fmt)->comp[0].step;
367  AVFrame * const p = f->cur;
368  int i, si;
369 
370  for( si=0; fs != f->slice_context[si]; si ++)
371  ;
372 
373  if(f->fsrc && !p->key_frame)
375 
376  if(f->fsrc && !p->key_frame) {
377  FFV1Context *fssrc = f->fsrc->slice_context[si];
378  FFV1Context *fsdst = f->slice_context[si];
379  av_assert1(fsdst->plane_count == fssrc->plane_count);
380  av_assert1(fsdst == fs);
381 
382  if (!p->key_frame)
383  fsdst->slice_damaged |= fssrc->slice_damaged;
384 
385  for (i = 0; i < f->plane_count; i++) {
386  PlaneContext *psrc = &fssrc->plane[i];
387  PlaneContext *pdst = &fsdst->plane[i];
388 
389  av_free(pdst->state);
390  av_free(pdst->vlc_state);
391  memcpy(pdst, psrc, sizeof(*pdst));
392  pdst->state = NULL;
393  pdst->vlc_state = NULL;
394 
395  if (fssrc->ac) {
397  memcpy(pdst->state, psrc->state, CONTEXT_SIZE * psrc->context_count);
398  } else {
399  pdst->vlc_state = av_malloc_array(sizeof(*pdst->vlc_state), psrc->context_count);
400  memcpy(pdst->vlc_state, psrc->vlc_state, sizeof(*pdst->vlc_state) * psrc->context_count);
401  }
402  }
403  }
404 
405  fs->slice_rct_by_coef = 1;
406  fs->slice_rct_ry_coef = 1;
407 
408  if (f->version > 2) {
409  if (ff_ffv1_init_slice_state(f, fs) < 0)
410  return AVERROR(ENOMEM);
411  if (decode_slice_header(f, fs) < 0) {
412  fs->slice_x = fs->slice_y = fs->slice_height = fs->slice_width = 0;
413  fs->slice_damaged = 1;
414  return AVERROR_INVALIDDATA;
415  }
416  }
417  if ((ret = ff_ffv1_init_slice_state(f, fs)) < 0)
418  return ret;
419  if (f->cur->key_frame || fs->slice_reset_contexts)
421 
422  width = fs->slice_width;
423  height = fs->slice_height;
424  x = fs->slice_x;
425  y = fs->slice_y;
426 
427  if (fs->ac == AC_GOLOMB_RICE) {
428  if (f->version == 3 && f->micro_version > 1 || f->version > 3)
429  get_rac(&fs->c, (uint8_t[]) { 129 });
430  fs->ac_byte_count = f->version > 2 || (!x && !y) ? fs->c.bytestream - fs->c.bytestream_start - 1 : 0;
431  init_get_bits(&fs->gb,
432  fs->c.bytestream_start + fs->ac_byte_count,
433  (fs->c.bytestream_end - fs->c.bytestream_start - fs->ac_byte_count) * 8);
434  }
435 
436  av_assert1(width && height);
437  if (f->colorspace == 0 && (f->chroma_planes || !fs->transparency)) {
438  const int chroma_width = AV_CEIL_RSHIFT(width, f->chroma_h_shift);
439  const int chroma_height = AV_CEIL_RSHIFT(height, f->chroma_v_shift);
440  const int cx = x >> f->chroma_h_shift;
441  const int cy = y >> f->chroma_v_shift;
442  decode_plane(fs, p->data[0] + ps*x + y*p->linesize[0], width, height, p->linesize[0], 0, 1);
443 
444  if (f->chroma_planes) {
445  decode_plane(fs, p->data[1] + ps*cx+cy*p->linesize[1], chroma_width, chroma_height, p->linesize[1], 1, 1);
446  decode_plane(fs, p->data[2] + ps*cx+cy*p->linesize[2], chroma_width, chroma_height, p->linesize[2], 1, 1);
447  }
448  if (fs->transparency)
449  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);
450  } else if (f->colorspace == 0) {
451  decode_plane(fs, p->data[0] + ps*x + y*p->linesize[0] , width, height, p->linesize[0], 0, 2);
452  decode_plane(fs, p->data[0] + ps*x + y*p->linesize[0] + 1, width, height, p->linesize[0], 1, 2);
453  } else {
454  uint8_t *planes[3] = { p->data[0] + ps * x + y * p->linesize[0],
455  p->data[1] + ps * x + y * p->linesize[1],
456  p->data[2] + ps * x + y * p->linesize[2] };
457  decode_rgb_frame(fs, planes, width, height, p->linesize);
458  }
459  if (fs->ac != AC_GOLOMB_RICE && f->version > 2) {
460  int v;
461  get_rac(&fs->c, (uint8_t[]) { 129 });
462  v = fs->c.bytestream_end - fs->c.bytestream - 2 - 5*f->ec;
463  if (v) {
464  av_log(f->avctx, AV_LOG_ERROR, "bytestream end mismatching by %d\n", v);
465  fs->slice_damaged = 1;
466  }
467  }
468 
469  emms_c();
470 
471  ff_thread_report_progress(&f->picture, si, 0);
472 
473  return 0;
474 }
475 
476 static int read_quant_table(RangeCoder *c, int16_t *quant_table, int scale)
477 {
478  int v;
479  int i = 0;
481 
482  memset(state, 128, sizeof(state));
483 
484  for (v = 0; i < 128; v++) {
485  unsigned len = get_symbol(c, state, 0) + 1;
486 
487  if (len > 128 - i || !len)
488  return AVERROR_INVALIDDATA;
489 
490  while (len--) {
491  quant_table[i] = scale * v;
492  i++;
493  }
494  }
495 
496  for (i = 1; i < 128; i++)
497  quant_table[256 - i] = -quant_table[i];
498  quant_table[128] = -quant_table[127];
499 
500  return 2 * v - 1;
501 }
502 
504  int16_t quant_table[MAX_CONTEXT_INPUTS][256])
505 {
506  int i;
507  int context_count = 1;
508 
509  for (i = 0; i < 5; i++) {
510  int ret = read_quant_table(c, quant_table[i], context_count);
511  if (ret < 0)
512  return ret;
513  context_count *= ret;
514  if (context_count > 32768U) {
515  return AVERROR_INVALIDDATA;
516  }
517  }
518  return (context_count + 1) / 2;
519 }
520 
522 {
523  RangeCoder *const c = &f->c;
525  int i, j, k, ret;
526  uint8_t state2[32][CONTEXT_SIZE];
527  unsigned crc = 0;
528 
529  memset(state2, 128, sizeof(state2));
530  memset(state, 128, sizeof(state));
531 
533  ff_build_rac_states(c, 0.05 * (1LL << 32), 256 - 8);
534 
535  f->version = get_symbol(c, state, 0);
536  if (f->version < 2) {
537  av_log(f->avctx, AV_LOG_ERROR, "Invalid version in global header\n");
538  return AVERROR_INVALIDDATA;
539  }
540  if (f->version > 2) {
541  c->bytestream_end -= 4;
542  f->micro_version = get_symbol(c, state, 0);
543  if (f->micro_version < 0)
544  return AVERROR_INVALIDDATA;
545  }
546  f->ac = get_symbol(c, state, 0);
547 
548  if (f->ac == AC_RANGE_CUSTOM_TAB) {
549  for (i = 1; i < 256; i++)
550  f->state_transition[i] = get_symbol(c, state, 1) + c->one_state[i];
551  }
552 
553  f->colorspace = get_symbol(c, state, 0); //YUV cs type
554  f->avctx->bits_per_raw_sample = get_symbol(c, state, 0);
555  f->chroma_planes = get_rac(c, state);
556  f->chroma_h_shift = get_symbol(c, state, 0);
557  f->chroma_v_shift = get_symbol(c, state, 0);
558  f->transparency = get_rac(c, state);
559  f->plane_count = 1 + (f->chroma_planes || f->version<4) + f->transparency;
560  f->num_h_slices = 1 + get_symbol(c, state, 0);
561  f->num_v_slices = 1 + get_symbol(c, state, 0);
562 
563  if (f->chroma_h_shift > 4U || f->chroma_v_shift > 4U) {
564  av_log(f->avctx, AV_LOG_ERROR, "chroma shift parameters %d %d are invalid\n",
566  return AVERROR_INVALIDDATA;
567  }
568 
569  if (f->num_h_slices > (unsigned)f->width || !f->num_h_slices ||
570  f->num_v_slices > (unsigned)f->height || !f->num_v_slices
571  ) {
572  av_log(f->avctx, AV_LOG_ERROR, "slice count invalid\n");
573  return AVERROR_INVALIDDATA;
574  }
575 
576  f->quant_table_count = get_symbol(c, state, 0);
577  if (f->quant_table_count > (unsigned)MAX_QUANT_TABLES || !f->quant_table_count) {
578  av_log(f->avctx, AV_LOG_ERROR, "quant table count %d is invalid\n", f->quant_table_count);
579  f->quant_table_count = 0;
580  return AVERROR_INVALIDDATA;
581  }
582 
583  for (i = 0; i < f->quant_table_count; i++) {
584  f->context_count[i] = read_quant_tables(c, f->quant_tables[i]);
585  if (f->context_count[i] < 0) {
586  av_log(f->avctx, AV_LOG_ERROR, "read_quant_table error\n");
587  return AVERROR_INVALIDDATA;
588  }
589  }
590  if ((ret = ff_ffv1_allocate_initial_states(f)) < 0)
591  return ret;
592 
593  for (i = 0; i < f->quant_table_count; i++)
594  if (get_rac(c, state)) {
595  for (j = 0; j < f->context_count[i]; j++)
596  for (k = 0; k < CONTEXT_SIZE; k++) {
597  int pred = j ? f->initial_states[i][j - 1][k] : 128;
598  f->initial_states[i][j][k] =
599  (pred + get_symbol(c, state2[k], 1)) & 0xFF;
600  }
601  }
602 
603  if (f->version > 2) {
604  f->ec = get_symbol(c, state, 0);
605  if (f->micro_version > 2)
606  f->intra = get_symbol(c, state, 0);
607  }
608 
609  if (f->version > 2) {
610  unsigned v;
613  if (v || f->avctx->extradata_size < 4) {
614  av_log(f->avctx, AV_LOG_ERROR, "CRC mismatch %X!\n", v);
615  return AVERROR_INVALIDDATA;
616  }
617  crc = AV_RB32(f->avctx->extradata + f->avctx->extradata_size - 4);
618  }
619 
620  if (f->avctx->debug & FF_DEBUG_PICT_INFO)
622  "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",
623  f->version, f->micro_version,
624  f->ac,
625  f->colorspace,
628  f->transparency,
629  f->num_h_slices, f->num_v_slices,
631  f->ec,
632  f->intra,
633  crc
634  );
635  return 0;
636 }
637 
638 static int read_header(FFV1Context *f)
639 {
641  int i, j, context_count = -1; //-1 to avoid warning
642  RangeCoder *const c = &f->slice_context[0]->c;
643 
644  memset(state, 128, sizeof(state));
645 
646  if (f->version < 2) {
648  unsigned v= get_symbol(c, state, 0);
649  if (v >= 2) {
650  av_log(f->avctx, AV_LOG_ERROR, "invalid version %d in ver01 header\n", v);
651  return AVERROR_INVALIDDATA;
652  }
653  f->version = v;
654  f->ac = get_symbol(c, state, 0);
655 
656  if (f->ac == AC_RANGE_CUSTOM_TAB) {
657  for (i = 1; i < 256; i++)
658  f->state_transition[i] = get_symbol(c, state, 1) + c->one_state[i];
659  }
660 
661  colorspace = get_symbol(c, state, 0); //YUV cs type
662  bits_per_raw_sample = f->version > 0 ? get_symbol(c, state, 0) : f->avctx->bits_per_raw_sample;
663  chroma_planes = get_rac(c, state);
664  chroma_h_shift = get_symbol(c, state, 0);
665  chroma_v_shift = get_symbol(c, state, 0);
666  transparency = get_rac(c, state);
667  if (colorspace == 0 && f->avctx->skip_alpha)
668  transparency = 0;
669 
670  if (f->plane_count) {
671  if (colorspace != f->colorspace ||
672  bits_per_raw_sample != f->avctx->bits_per_raw_sample ||
673  chroma_planes != f->chroma_planes ||
674  chroma_h_shift != f->chroma_h_shift ||
675  chroma_v_shift != f->chroma_v_shift ||
676  transparency != f->transparency) {
677  av_log(f->avctx, AV_LOG_ERROR, "Invalid change of global parameters\n");
678  return AVERROR_INVALIDDATA;
679  }
680  }
681 
682  if (chroma_h_shift > 4U || chroma_v_shift > 4U) {
683  av_log(f->avctx, AV_LOG_ERROR, "chroma shift parameters %d %d are invalid\n",
684  chroma_h_shift, chroma_v_shift);
685  return AVERROR_INVALIDDATA;
686  }
687 
688  f->colorspace = colorspace;
694 
695  f->plane_count = 2 + f->transparency;
696  }
697 
698  if (f->colorspace == 0) {
699  if (!f->transparency && !f->chroma_planes) {
700  if (f->avctx->bits_per_raw_sample <= 8)
702  else
704  } else if (f->transparency && !f->chroma_planes) {
705  if (f->avctx->bits_per_raw_sample <= 8)
707  else
708  return AVERROR(ENOSYS);
709  } else if (f->avctx->bits_per_raw_sample<=8 && !f->transparency) {
710  switch(16 * f->chroma_h_shift + f->chroma_v_shift) {
711  case 0x00: f->avctx->pix_fmt = AV_PIX_FMT_YUV444P; break;
712  case 0x01: f->avctx->pix_fmt = AV_PIX_FMT_YUV440P; break;
713  case 0x10: f->avctx->pix_fmt = AV_PIX_FMT_YUV422P; break;
714  case 0x11: f->avctx->pix_fmt = AV_PIX_FMT_YUV420P; break;
715  case 0x20: f->avctx->pix_fmt = AV_PIX_FMT_YUV411P; break;
716  case 0x22: f->avctx->pix_fmt = AV_PIX_FMT_YUV410P; break;
717  }
718  } else if (f->avctx->bits_per_raw_sample <= 8 && f->transparency) {
719  switch(16*f->chroma_h_shift + f->chroma_v_shift) {
720  case 0x00: f->avctx->pix_fmt = AV_PIX_FMT_YUVA444P; break;
721  case 0x10: f->avctx->pix_fmt = AV_PIX_FMT_YUVA422P; break;
722  case 0x11: f->avctx->pix_fmt = AV_PIX_FMT_YUVA420P; break;
723  }
724  } else if (f->avctx->bits_per_raw_sample == 9 && !f->transparency) {
725  f->packed_at_lsb = 1;
726  switch(16 * f->chroma_h_shift + f->chroma_v_shift) {
727  case 0x00: f->avctx->pix_fmt = AV_PIX_FMT_YUV444P9; break;
728  case 0x10: f->avctx->pix_fmt = AV_PIX_FMT_YUV422P9; break;
729  case 0x11: f->avctx->pix_fmt = AV_PIX_FMT_YUV420P9; break;
730  }
731  } else if (f->avctx->bits_per_raw_sample == 9 && f->transparency) {
732  f->packed_at_lsb = 1;
733  switch(16 * f->chroma_h_shift + f->chroma_v_shift) {
734  case 0x00: f->avctx->pix_fmt = AV_PIX_FMT_YUVA444P9; break;
735  case 0x10: f->avctx->pix_fmt = AV_PIX_FMT_YUVA422P9; break;
736  case 0x11: f->avctx->pix_fmt = AV_PIX_FMT_YUVA420P9; break;
737  }
738  } else if (f->avctx->bits_per_raw_sample == 10 && !f->transparency) {
739  f->packed_at_lsb = 1;
740  switch(16 * f->chroma_h_shift + f->chroma_v_shift) {
741  case 0x00: f->avctx->pix_fmt = AV_PIX_FMT_YUV444P10; break;
742  case 0x10: f->avctx->pix_fmt = AV_PIX_FMT_YUV422P10; break;
743  case 0x11: f->avctx->pix_fmt = AV_PIX_FMT_YUV420P10; break;
744  }
745  } else if (f->avctx->bits_per_raw_sample == 10 && f->transparency) {
746  f->packed_at_lsb = 1;
747  switch(16 * f->chroma_h_shift + f->chroma_v_shift) {
748  case 0x00: f->avctx->pix_fmt = AV_PIX_FMT_YUVA444P10; break;
749  case 0x10: f->avctx->pix_fmt = AV_PIX_FMT_YUVA422P10; break;
750  case 0x11: f->avctx->pix_fmt = AV_PIX_FMT_YUVA420P10; break;
751  }
752  } else if (f->avctx->bits_per_raw_sample == 16 && !f->transparency){
753  switch(16 * f->chroma_h_shift + f->chroma_v_shift) {
754  case 0x00: f->avctx->pix_fmt = AV_PIX_FMT_YUV444P16; break;
755  case 0x10: f->avctx->pix_fmt = AV_PIX_FMT_YUV422P16; break;
756  case 0x11: f->avctx->pix_fmt = AV_PIX_FMT_YUV420P16; break;
757  }
758  } else if (f->avctx->bits_per_raw_sample == 16 && f->transparency){
759  switch(16 * f->chroma_h_shift + f->chroma_v_shift) {
760  case 0x00: f->avctx->pix_fmt = AV_PIX_FMT_YUVA444P16; break;
761  case 0x10: f->avctx->pix_fmt = AV_PIX_FMT_YUVA422P16; break;
762  case 0x11: f->avctx->pix_fmt = AV_PIX_FMT_YUVA420P16; break;
763  }
764  }
765  } else if (f->colorspace == 1) {
766  if (f->chroma_h_shift || f->chroma_v_shift) {
768  "chroma subsampling not supported in this colorspace\n");
769  return AVERROR(ENOSYS);
770  }
771  if ( f->avctx->bits_per_raw_sample <= 8 && !f->transparency)
773  else if (f->avctx->bits_per_raw_sample <= 8 && f->transparency)
775  else if (f->avctx->bits_per_raw_sample == 9 && !f->transparency)
777  else if (f->avctx->bits_per_raw_sample == 10 && !f->transparency)
779  else if (f->avctx->bits_per_raw_sample == 12 && !f->transparency)
781  else if (f->avctx->bits_per_raw_sample == 14 && !f->transparency)
783  } else {
784  av_log(f->avctx, AV_LOG_ERROR, "colorspace not supported\n");
785  return AVERROR(ENOSYS);
786  }
787  if (f->avctx->pix_fmt == AV_PIX_FMT_NONE) {
788  av_log(f->avctx, AV_LOG_ERROR, "format not supported\n");
789  return AVERROR(ENOSYS);
790  }
791 
792  ff_dlog(f->avctx, "%d %d %d\n",
794  if (f->version < 2) {
795  context_count = read_quant_tables(c, f->quant_table);
796  if (context_count < 0) {
797  av_log(f->avctx, AV_LOG_ERROR, "read_quant_table error\n");
798  return AVERROR_INVALIDDATA;
799  }
801  } else if (f->version < 3) {
802  f->slice_count = get_symbol(c, state, 0);
803  } else {
804  const uint8_t *p = c->bytestream_end;
805  for (f->slice_count = 0;
806  f->slice_count < MAX_SLICES && 3 < p - c->bytestream_start;
807  f->slice_count++) {
808  int trailer = 3 + 5*!!f->ec;
809  int size = AV_RB24(p-trailer);
810  if (size + trailer > p - c->bytestream_start)
811  break;
812  p -= size + trailer;
813  }
814  }
815  if (f->slice_count > (unsigned)MAX_SLICES || f->slice_count <= 0 || f->slice_count > f->max_slice_count) {
816  av_log(f->avctx, AV_LOG_ERROR, "slice count %d is invalid (max=%d)\n", f->slice_count, f->max_slice_count);
817  return AVERROR_INVALIDDATA;
818  }
819 
820  for (j = 0; j < f->slice_count; j++) {
821  FFV1Context *fs = f->slice_context[j];
822  fs->ac = f->ac;
823  fs->packed_at_lsb = f->packed_at_lsb;
824 
825  fs->slice_damaged = 0;
826 
827  if (f->version == 2) {
828  fs->slice_x = get_symbol(c, state, 0) * f->width ;
829  fs->slice_y = get_symbol(c, state, 0) * f->height;
830  fs->slice_width = (get_symbol(c, state, 0) + 1) * f->width + fs->slice_x;
831  fs->slice_height = (get_symbol(c, state, 0) + 1) * f->height + fs->slice_y;
832 
833  fs->slice_x /= f->num_h_slices;
834  fs->slice_y /= f->num_v_slices;
835  fs->slice_width = fs->slice_width / f->num_h_slices - fs->slice_x;
836  fs->slice_height = fs->slice_height / f->num_v_slices - fs->slice_y;
837  if ((unsigned)fs->slice_width > f->width ||
838  (unsigned)fs->slice_height > f->height)
839  return AVERROR_INVALIDDATA;
840  if ( (unsigned)fs->slice_x + (uint64_t)fs->slice_width > f->width
841  || (unsigned)fs->slice_y + (uint64_t)fs->slice_height > f->height)
842  return AVERROR_INVALIDDATA;
843  }
844 
845  for (i = 0; i < f->plane_count; i++) {
846  PlaneContext *const p = &fs->plane[i];
847 
848  if (f->version == 2) {
849  int idx = get_symbol(c, state, 0);
850  if (idx > (unsigned)f->quant_table_count) {
852  "quant_table_index out of range\n");
853  return AVERROR_INVALIDDATA;
854  }
855  p->quant_table_index = idx;
856  memcpy(p->quant_table, f->quant_tables[idx],
857  sizeof(p->quant_table));
858  context_count = f->context_count[idx];
859  } else {
860  memcpy(p->quant_table, f->quant_table, sizeof(p->quant_table));
861  }
862 
863  if (f->version <= 2) {
864  av_assert0(context_count >= 0);
865  if (p->context_count < context_count) {
866  av_freep(&p->state);
867  av_freep(&p->vlc_state);
868  }
870  }
871  }
872  }
873  return 0;
874 }
875 
877 {
878  FFV1Context *f = avctx->priv_data;
879  int ret;
880 
881  if ((ret = ff_ffv1_common_init(avctx)) < 0)
882  return ret;
883 
884  if (avctx->extradata && (ret = read_extra_header(f)) < 0)
885  return ret;
886 
887  if ((ret = ff_ffv1_init_slice_contexts(f)) < 0)
888  return ret;
889 
890  avctx->internal->allocate_progress = 1;
891 
892  return 0;
893 }
894 
895 static int decode_frame(AVCodecContext *avctx, void *data, int *got_frame, AVPacket *avpkt)
896 {
897  uint8_t *buf = avpkt->data;
898  int buf_size = avpkt->size;
899  FFV1Context *f = avctx->priv_data;
900  RangeCoder *const c = &f->slice_context[0]->c;
901  int i, ret;
902  uint8_t keystate = 128;
903  uint8_t *buf_p;
904  AVFrame *p;
905 
906  if (f->last_picture.f)
909 
910  f->cur = p = f->picture.f;
911 
912  if (f->version < 3 && avctx->field_order > AV_FIELD_PROGRESSIVE) {
913  /* we have interlaced material flagged in container */
914  p->interlaced_frame = 1;
915  if (avctx->field_order == AV_FIELD_TT || avctx->field_order == AV_FIELD_TB)
916  p->top_field_first = 1;
917  }
918 
919  f->avctx = avctx;
920  ff_init_range_decoder(c, buf, buf_size);
921  ff_build_rac_states(c, 0.05 * (1LL << 32), 256 - 8);
922 
923  p->pict_type = AV_PICTURE_TYPE_I; //FIXME I vs. P
924  if (get_rac(c, &keystate)) {
925  p->key_frame = 1;
926  f->key_frame_ok = 0;
927  if ((ret = read_header(f)) < 0)
928  return ret;
929  f->key_frame_ok = 1;
930  } else {
931  if (!f->key_frame_ok) {
932  av_log(avctx, AV_LOG_ERROR,
933  "Cannot decode non-keyframe without valid keyframe\n");
934  return AVERROR_INVALIDDATA;
935  }
936  p->key_frame = 0;
937  }
938 
939  if ((ret = ff_thread_get_buffer(avctx, &f->picture, AV_GET_BUFFER_FLAG_REF)) < 0)
940  return ret;
941 
942  if (avctx->debug & FF_DEBUG_PICT_INFO)
943  av_log(avctx, AV_LOG_DEBUG, "ver:%d keyframe:%d coder:%d ec:%d slices:%d bps:%d\n",
944  f->version, p->key_frame, f->ac, f->ec, f->slice_count, f->avctx->bits_per_raw_sample);
945 
946  ff_thread_finish_setup(avctx);
947 
948  buf_p = buf + buf_size;
949  for (i = f->slice_count - 1; i >= 0; i--) {
950  FFV1Context *fs = f->slice_context[i];
951  int trailer = 3 + 5*!!f->ec;
952  int v;
953 
954  if (i || f->version > 2) v = AV_RB24(buf_p-trailer) + trailer;
955  else v = buf_p - c->bytestream_start;
956  if (buf_p - c->bytestream_start < v) {
957  av_log(avctx, AV_LOG_ERROR, "Slice pointer chain broken\n");
958  ff_thread_report_progress(&f->picture, INT_MAX, 0);
959  return AVERROR_INVALIDDATA;
960  }
961  buf_p -= v;
962 
963  if (f->ec) {
964  unsigned crc = av_crc(av_crc_get_table(AV_CRC_32_IEEE), 0, buf_p, v);
965  if (crc) {
966  int64_t ts = avpkt->pts != AV_NOPTS_VALUE ? avpkt->pts : avpkt->dts;
967  av_log(f->avctx, AV_LOG_ERROR, "CRC mismatch %X!", crc);
968  if (ts != AV_NOPTS_VALUE && avctx->pkt_timebase.num) {
969  av_log(f->avctx, AV_LOG_ERROR, "at %f seconds\n", ts*av_q2d(avctx->pkt_timebase));
970  } else if (ts != AV_NOPTS_VALUE) {
971  av_log(f->avctx, AV_LOG_ERROR, "at %"PRId64"\n", ts);
972  } else {
973  av_log(f->avctx, AV_LOG_ERROR, "\n");
974  }
975  fs->slice_damaged = 1;
976  }
977  if (avctx->debug & FF_DEBUG_PICT_INFO) {
978  av_log(avctx, AV_LOG_DEBUG, "slice %d, CRC: 0x%08X\n", i, AV_RB32(buf_p + v - 4));
979  }
980  }
981 
982  if (i) {
983  ff_init_range_decoder(&fs->c, buf_p, v);
984  } else
985  fs->c.bytestream_end = buf_p + v;
986 
987  fs->avctx = avctx;
988  fs->cur = p;
989  }
990 
991  avctx->execute(avctx,
992  decode_slice,
993  &f->slice_context[0],
994  NULL,
995  f->slice_count,
996  sizeof(void*));
997 
998  for (i = f->slice_count - 1; i >= 0; i--) {
999  FFV1Context *fs = f->slice_context[i];
1000  int j;
1001  if (fs->slice_damaged && f->last_picture.f->data[0]) {
1003  const uint8_t *src[4];
1004  uint8_t *dst[4];
1005  ff_thread_await_progress(&f->last_picture, INT_MAX, 0);
1006  for (j = 0; j < 4; j++) {
1007  int pixshift = desc->comp[j].depth > 8;
1008  int sh = (j == 1 || j == 2) ? f->chroma_h_shift : 0;
1009  int sv = (j == 1 || j == 2) ? f->chroma_v_shift : 0;
1010  dst[j] = p->data[j] + p->linesize[j] *
1011  (fs->slice_y >> sv) + ((fs->slice_x >> sh) << pixshift);
1012  src[j] = f->last_picture.f->data[j] + f->last_picture.f->linesize[j] *
1013  (fs->slice_y >> sv) + ((fs->slice_x >> sh) << pixshift);
1014  }
1015  av_image_copy(dst, p->linesize, src,
1016  f->last_picture.f->linesize,
1017  avctx->pix_fmt,
1018  fs->slice_width,
1019  fs->slice_height);
1020  }
1021  }
1022  ff_thread_report_progress(&f->picture, INT_MAX, 0);
1023 
1024  f->picture_number++;
1025 
1026  if (f->last_picture.f)
1028  f->cur = NULL;
1029  if ((ret = av_frame_ref(data, f->picture.f)) < 0)
1030  return ret;
1031 
1032  *got_frame = 1;
1033 
1034  return buf_size;
1035 }
1036 
1037 #if HAVE_THREADS
1039 {
1040  FFV1Context *f = avctx->priv_data;
1041  int i, ret;
1042 
1043  f->picture.f = NULL;
1044  f->last_picture.f = NULL;
1045  f->sample_buffer = NULL;
1046  f->max_slice_count = 0;
1047  f->slice_count = 0;
1048 
1049  for (i = 0; i < f->quant_table_count; i++) {
1050  av_assert0(f->version > 1);
1051  f->initial_states[i] = av_memdup(f->initial_states[i],
1052  f->context_count[i] * sizeof(*f->initial_states[i]));
1053  }
1054 
1055  f->picture.f = av_frame_alloc();
1056  f->last_picture.f = av_frame_alloc();
1057 
1058  if ((ret = ff_ffv1_init_slice_contexts(f)) < 0)
1059  return ret;
1060 
1061  return 0;
1062 }
1063 #endif
1064 
1065 static void copy_fields(FFV1Context *fsdst, FFV1Context *fssrc, FFV1Context *fsrc)
1066 {
1067  fsdst->version = fsrc->version;
1068  fsdst->micro_version = fsrc->micro_version;
1069  fsdst->chroma_planes = fsrc->chroma_planes;
1070  fsdst->chroma_h_shift = fsrc->chroma_h_shift;
1071  fsdst->chroma_v_shift = fsrc->chroma_v_shift;
1072  fsdst->transparency = fsrc->transparency;
1073  fsdst->plane_count = fsrc->plane_count;
1074  fsdst->ac = fsrc->ac;
1075  fsdst->colorspace = fsrc->colorspace;
1076 
1077  fsdst->ec = fsrc->ec;
1078  fsdst->intra = fsrc->intra;
1079  fsdst->slice_damaged = fssrc->slice_damaged;
1080  fsdst->key_frame_ok = fsrc->key_frame_ok;
1081 
1083  fsdst->packed_at_lsb = fsrc->packed_at_lsb;
1084  fsdst->slice_count = fsrc->slice_count;
1085  if (fsrc->version<3){
1086  fsdst->slice_x = fssrc->slice_x;
1087  fsdst->slice_y = fssrc->slice_y;
1088  fsdst->slice_width = fssrc->slice_width;
1089  fsdst->slice_height = fssrc->slice_height;
1090  }
1091 }
1092 
1093 #if HAVE_THREADS
1094 static int update_thread_context(AVCodecContext *dst, const AVCodecContext *src)
1095 {
1096  FFV1Context *fsrc = src->priv_data;
1097  FFV1Context *fdst = dst->priv_data;
1098  int i, ret;
1099 
1100  if (dst == src)
1101  return 0;
1102 
1103  {
1107  memcpy(initial_states, fdst->initial_states, sizeof(fdst->initial_states));
1108  memcpy(slice_context, fdst->slice_context , sizeof(fdst->slice_context));
1109 
1110  memcpy(fdst, fsrc, sizeof(*fdst));
1111  memcpy(fdst->initial_states, initial_states, sizeof(fdst->initial_states));
1112  memcpy(fdst->slice_context, slice_context , sizeof(fdst->slice_context));
1113  fdst->picture = picture;
1114  fdst->last_picture = last_picture;
1115  for (i = 0; i<fdst->num_h_slices * fdst->num_v_slices; i++) {
1116  FFV1Context *fssrc = fsrc->slice_context[i];
1117  FFV1Context *fsdst = fdst->slice_context[i];
1118  copy_fields(fsdst, fssrc, fsrc);
1119  }
1120  av_assert0(!fdst->plane[0].state);
1121  av_assert0(!fdst->sample_buffer);
1122  }
1123 
1124  av_assert1(fdst->max_slice_count == fsrc->max_slice_count);
1125 
1126 
1127  ff_thread_release_buffer(dst, &fdst->picture);
1128  if (fsrc->picture.f->data[0]) {
1129  if ((ret = ff_thread_ref_frame(&fdst->picture, &fsrc->picture)) < 0)
1130  return ret;
1131  }
1132 
1133  fdst->fsrc = fsrc;
1134 
1135  return 0;
1136 }
1137 #endif
1138 
1140  .name = "ffv1",
1141  .long_name = NULL_IF_CONFIG_SMALL("FFmpeg video codec #1"),
1142  .type = AVMEDIA_TYPE_VIDEO,
1143  .id = AV_CODEC_ID_FFV1,
1144  .priv_data_size = sizeof(FFV1Context),
1145  .init = decode_init,
1146  .close = ff_ffv1_close,
1147  .decode = decode_frame,
1149  .update_thread_context = ONLY_IF_THREADS_ENABLED(update_thread_context),
1150  .capabilities = AV_CODEC_CAP_DR1 /*| AV_CODEC_CAP_DRAW_HORIZ_BAND*/ |
1152  .caps_internal = FF_CODEC_CAP_INIT_CLEANUP
1153 };
#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:148
#define NULL
Definition: coverity.c:32
const uint8_t ff_log2_run[41]
Definition: bitstream.c:40
#define AV_PIX_FMT_YUVA422P16
Definition: pixfmt.h:378
const char * s
Definition: avisynth_c.h:631
#define AVERROR_INVALIDDATA
Invalid data found when processing input.
Definition: error.h:59
#define AV_PIX_FMT_YUVA422P9
Definition: pixfmt.h:372
const AVPixFmtDescriptor * av_pix_fmt_desc_get(enum AVPixelFormat pix_fmt)
Definition: pixdesc.c:2222
This structure describes decoded (raw) audio or video data.
Definition: frame.h:184
ptrdiff_t const GLvoid * data
Definition: opengl_enc.c:101
#define AV_PIX_FMT_YUVA420P10
Definition: pixfmt.h:374
8 bits gray, 8 bits alpha
Definition: pixfmt.h:154
#define AV_PIX_FMT_YUVA422P10
Definition: pixfmt.h:375
planar YUV 4:4:4, 24bpp, (1 Cr & Cb sample per 1x1 Y samples)
Definition: pixfmt.h:67
misc image utilities
static unsigned int get_bits(GetBitContext *s, int n)
Read 1-25 bits.
Definition: get_bits.h:247
#define AV_LOG_WARNING
Something somehow does not look correct.
Definition: log.h:182
static int init_thread_copy(AVCodecContext *avctx)
Definition: tta.c:390
AVFrame * f
Definition: thread.h:36
int16_t quant_table[MAX_CONTEXT_INPUTS][256]
Definition: ffv1.h:69
int quant_table_count
Definition: ffv1.h:123
else temp
Definition: vf_mcdeint.c:259
const char * g
Definition: vf_curves.c:108
const char * desc
Definition: nvenc.c:89
static av_cold int init(AVCodecContext *avctx)
Definition: avrndec.c:35
static int decode_slice(AVCodecContext *c, void *arg)
Definition: ffv1dec.c:361
int slice_height
Definition: ffv1.h:131
#define MAX_CONTEXT_INPUTS
Definition: ffv1.h:54
int16_t * sample_buffer
Definition: ffv1.h:111
int version
Definition: ffv1.h:87
int micro_version
Definition: ffv1.h:88
Range coder.
uint8_t * bytestream_end
Definition: rangecoder.h:44
int num
numerator
Definition: rational.h:44
int size
Definition: avcodec.h:1580
const char * b
Definition: vf_curves.c:109
#define AV_PIX_FMT_GBRP10
Definition: pixfmt.h:357
static int read_quant_table(RangeCoder *c, int16_t *quant_table, int scale)
Definition: ffv1dec.c:476
static av_flatten int get_symbol_inline(RangeCoder *c, uint8_t *state, int is_signed)
Definition: ffv1dec.c:42
enum AVPixelFormat pix_fmt
Pixel format, see AV_PIX_FMT_xxx.
Definition: avcodec.h:1876
static int decode_frame(AVCodecContext *avctx, void *data, int *got_frame, AVPacket *avpkt)
Definition: ffv1dec.c:895
int bits_per_raw_sample
Bits per sample/pixel of internal libavcodec pixel/sample format.
Definition: avcodec.h:3048
FF Video Codec 1 (a lossless codec)
void ff_thread_await_progress(ThreadFrame *f, int n, int field)
Wait for earlier decoding threads to finish reference pictures.
static av_always_inline void predict(PredictorState *ps, float *coef, int output_enable)
Definition: aacdec.c:174
#define sample
int height
Definition: ffv1.h:89
AVCodec.
Definition: avcodec.h:3541
uint8_t one_state[256]
Definition: rangecoder.h:41
int slice_reset_contexts
Definition: ffv1.h:134
enum AVPictureType last_picture
Definition: movenc.c:68
int slice_rct_by_coef
Definition: ffv1.h:136
int plane_count
Definition: ffv1.h:100
int slice_damaged
Definition: ffv1.h:115
ThreadFrame picture
Definition: ffv1.h:96
#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:102
static int read_quant_tables(RangeCoder *c, int16_t quant_table[MAX_CONTEXT_INPUTS][256])
Definition: ffv1dec.c:503
uint8_t bits
Definition: crc.c:296
AVComponentDescriptor comp[4]
Parameters that describe how pixels are packed.
Definition: pixdesc.h:117
uint8_t
#define av_cold
Definition: attributes.h:82
static int get_rac(RangeCoder *c, uint8_t *const state)
Definition: rangecoder.h:115
AVFrame * av_frame_alloc(void)
Allocate an AVFrame and set its fields to default values.
Definition: frame.c:140
#define av_assert2(cond)
assert() equivalent, that does lie in speed critical code.
Definition: avassert.h:63
AVOptions.
#define FF_DEBUG_PICT_INFO
Definition: avcodec.h:2888
int8_t bias
Definition: ffv1.h:64
RangeCoder c
Definition: ffv1.h:82
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:374
av_cold int ff_ffv1_common_init(AVCodecContext *avctx)
Definition: ffv1.c:43
uint8_t * extradata
some codecs need / can use extradata like Huffman tables.
Definition: avcodec.h:1763
#define AV_PIX_FMT_YUVA420P9
Definition: pixfmt.h:371
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:356
int slice_y
Definition: ffv1.h:133
uint8_t(*[MAX_QUANT_TABLES] initial_states)[32]
Definition: ffv1.h:108
ThreadFrame last_picture
Definition: ffv1.h:96
av_cold int ff_ffv1_close(AVCodecContext *avctx)
Definition: ffv1.c:206
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:266
#define height
static double av_q2d(AVRational a)
Convert rational to double.
Definition: rational.h:80
uint8_t * data
Definition: avcodec.h:1579
static int get_bits_count(const GetBitContext *s)
Definition: get_bits.h:199
uint8_t count
Definition: ffv1.h:65
int ff_thread_ref_frame(ThreadFrame *dst, ThreadFrame *src)
Definition: utils.c:3841
#define ff_dlog(a,...)
bitstream reader API header.
#define AV_PIX_FMT_YUV444P16
Definition: pixfmt.h:354
static void decode_rgb_frame(FFV1Context *s, uint8_t *src[3], int w, int h, int stride[3])
Definition: ffv1dec.c:226
int interlaced_frame
The content of the picture is interlaced.
Definition: frame.h:318
VlcState * vlc_state
Definition: ffv1.h:73
ptrdiff_t size
Definition: opengl_enc.c:101
void ff_thread_finish_setup(AVCodecContext *avctx)
If the codec defines update_thread_context(), call this when they are ready for the next thread to st...
#define AV_PIX_FMT_YUVA420P16
Definition: pixfmt.h:377
high precision timer, useful to profile code
#define av_log(a,...)
int bits_per_raw_sample
Definition: ffv1.h:119
int slice_width
Definition: ffv1.h:130
GetBitContext gb
Definition: ffv1.h:83
#define U(x)
Definition: vp56_arith.h:37
AVFrame * cur
Definition: ffv1.h:99
AVRational pkt_timebase
Timebase in which pkt_dts/pts and AVPacket.dts/pts are.
Definition: avcodec.h:3353
planar YUV 4:2:2 24bpp, (1 Cr & Cb sample per 2x1 Y & A samples)
Definition: pixfmt.h:187
#define AV_LOG_ERROR
Something went wrong and cannot losslessly be recovered.
Definition: log.h:176
static int decode_slice_header(FFV1Context *f, FFV1Context *fs)
Definition: ffv1dec.c:282
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:105
#define AVERROR(e)
Definition: error.h:43
int skip_alpha
Skip processing alpha if supported by codec.
Definition: avcodec.h:3416
#define NULL_IF_CONFIG_SMALL(x)
Return NULL if CONFIG_SMALL is true, otherwise the argument without modification. ...
Definition: internal.h:176
const char * r
Definition: vf_curves.c:107
#define AV_LOG_DEBUG
Stuff which is only useful for libav* developers.
Definition: log.h:197
int context_count
Definition: ffv1.h:71
#define AV_PIX_FMT_YUVA444P16
Definition: pixfmt.h:379
const char * arg
Definition: jacosubdec.c:66
simple assert() macros that are a bit more flexible than ISO C assert().
const char * name
Name of the codec implementation.
Definition: avcodec.h:3548
#define AV_PIX_FMT_YUV444P10
Definition: pixfmt.h:344
int ff_ffv1_allocate_initial_states(FFV1Context *f)
Definition: ffv1.c:163
#define MAX_SLICES
Definition: dxva2_hevc.c:32
static const uint8_t offset[127][2]
Definition: vf_spp.c:92
#define AV_CODEC_CAP_FRAME_THREADS
Codec supports frame-level multithreading.
Definition: avcodec.h:1018
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:302
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:66
#define ONLY_IF_THREADS_ENABLED(x)
Define a function with only the non-default version specified.
Definition: internal.h:215
int ac
1=range coder <-> 0=golomb rice
Definition: ffv1.h:101
int16_t quant_table[MAX_CONTEXT_INPUTS][256]
Definition: ffv1.h:104
#define AC_RANGE_CUSTOM_TAB
Definition: ffv1.h:58
int run_index
Definition: ffv1.h:109
Definition: ffv1.h:61
#define AV_PIX_FMT_YUV422P9
Definition: pixfmt.h:339
#define av_flatten
Definition: attributes.h:88
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:107
static void copy_fields(FFV1Context *fsdst, FFV1Context *fssrc, FFV1Context *fsrc)
Definition: ffv1dec.c:1065
enum AVPictureType pict_type
Picture type of the frame.
Definition: frame.h:258
#define AV_PIX_FMT_GRAY16
Definition: pixfmt.h:325
#define av_assert1(cond)
assert() equivalent, that does not lie in speed critical code.
Definition: avassert.h:53
#define FFMIN(a, b)
Definition: common.h:96
int num_h_slices
Definition: ffv1.h:129
#define width
#define MAX_QUANT_TABLES
Definition: ffv1.h:53
int colorspace
Definition: ffv1.h:110
static void decode_plane(FFV1Context *s, uint8_t *src, int w, int h, int stride, int plane_index, int pixel_stride)
Definition: ffv1dec.c:183
static float quant_table[96]
Definition: binkaudio.c:41
void ff_thread_report_progress(ThreadFrame *f, int n, int field)
Notify later decoding threads when part of their reference picture is ready.
static int get_context(PlaneContext *p, int16_t *src, int16_t *last, int16_t *last2)
Definition: ffv1.h:170
static void update_vlc_state(VlcState *const state, const int v)
Definition: ffv1.h:192
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:357
int slice_count
Definition: ffv1.h:126
int max_slice_count
Definition: ffv1.h:127
void ff_build_rac_states(RangeCoder *c, int factor, int max_p)
Definition: rangecoder.c:63
av_cold int ff_ffv1_init_slice_contexts(FFV1Context *f)
Definition: ffv1.c:118
av_cold int ff_ffv1_init_slice_state(FFV1Context *f, FFV1Context *fs)
Definition: ffv1.c:68
#define AV_PIX_FMT_YUVA444P10
Definition: pixfmt.h:376
int ac_byte_count
number of bytes used for AC coding
Definition: ffv1.h:102
static av_always_inline void decode_line(FFV1Context *s, int w, int16_t *sample[2], int plane_index, int bits)
Definition: ffv1dec.c:100
int16_t drift
Definition: ffv1.h:62
#define src
Definition: vp9dsp.c:530
int packed_at_lsb
Definition: ffv1.h:120
#define AV_PIX_FMT_YUV444P9
Definition: pixfmt.h:340
#define AV_PIX_FMT_GBRP14
Definition: pixfmt.h:359
static int read_header(FFV1Context *f)
Definition: ffv1dec.c:638
static const float pred[4]
Definition: siprdata.h:259
void * av_memdup(const void *p, size_t size)
Duplicate the buffer p.
Definition: mem.c:299
#define AV_PIX_FMT_YUV420P16
Definition: pixfmt.h:352
#define AV_CODEC_CAP_SLICE_THREADS
Codec supports slice-based (or partition-based) multithreading.
Definition: avcodec.h:1022
int context_count[MAX_QUANT_TABLES]
Definition: ffv1.h:106
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:215
planar YUV 4:4:4 32bpp, (1 Cr & Cb sample per 1x1 Y & A samples)
Definition: pixfmt.h:188
int debug
debug
Definition: avcodec.h:2887
Descriptor that unambiguously describes how the bits of a pixel are stored in the up to 4 data planes...
Definition: pixdesc.h:81
int ff_thread_get_buffer(AVCodecContext *avctx, ThreadFrame *f, int flags)
Wrapper around get_buffer() for frame-multithreaded codecs.
main external API structure.
Definition: avcodec.h:1648
#define AV_PIX_FMT_RGB32
Definition: pixfmt.h:318
int intra
Definition: ffv1.h:114
AVRational sample_aspect_ratio
Sample aspect ratio for the video frame, 0/1 if unknown/unspecified.
Definition: frame.h:263
void * buf
Definition: avisynth_c.h:553
int extradata_size
Definition: avcodec.h:1764
static unsigned int get_bits1(GetBitContext *s)
Definition: get_bits.h:299
#define AV_PIX_FMT_YUV420P10
Definition: pixfmt.h:341
planar YUV 4:1:0, 9bpp, (1 Cr & Cb sample per 4x4 Y samples)
Definition: pixfmt.h:68
rational number numerator/denominator
Definition: rational.h:43
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:56
static int init_get_bits(GetBitContext *s, const uint8_t *buffer, int bit_size)
Initialize GetBitContext.
Definition: get_bits.h:406
int picture_number
Definition: ffv1.h:94
uint16_t error_sum
Definition: ffv1.h:63
#define AV_PIX_FMT_YUV420P9
Definition: pixfmt.h:338
int allocate_progress
Whether to allocate progress for frame threading.
Definition: internal.h:126
int key_frame_ok
Definition: ffv1.h:116
static struct @228 state
#define AV_PIX_FMT_GBRP12
Definition: pixfmt.h:358
#define CONTEXT_SIZE
Definition: ffv1.h:51
#define AV_PIX_FMT_YUV422P10
Definition: pixfmt.h:342
int quant_table_index
Definition: ffv1.h:70
uint8_t * data[AV_NUM_DATA_POINTERS]
pointer to the picture/channel planes.
Definition: frame.h:198
const AVCRC * av_crc_get_table(AVCRCId crc_id)
Get an initialized standard CRC table.
Definition: crc.c:343
static int decode(AVCodecContext *avctx, void *data, int *got_sub, AVPacket *avpkt)
Definition: ccaption_dec.c:722
GLint GLenum GLboolean GLsizei stride
Definition: opengl_enc.c:105
planar YUV 4:2:0, 12bpp, (1 Cr & Cb sample per 2x2 Y samples)
Definition: pixfmt.h:62
Y , 8bpp.
Definition: pixfmt.h:70
common internal api header.
if(ret< 0)
Definition: vf_mcdeint.c:282
static double c[64]
void ff_ffv1_clear_slice_state(FFV1Context *f, FFV1Context *fs)
Definition: ffv1.c:178
#define AV_PIX_FMT_YUVA444P9
Definition: pixfmt.h:373
uint8_t(* state)[CONTEXT_SIZE]
Definition: ffv1.h:72
planar YUV 4:1:1, 12bpp, (1 Cr & Cb sample per 4x1 Y samples)
Definition: pixfmt.h:69
int den
denominator
Definition: rational.h:45
int slice_coding_mode
Definition: ffv1.h:135
uint8_t * bytestream_start
Definition: rangecoder.h:42
static av_cold int decode_init(AVCodecContext *avctx)
Definition: ffv1dec.c:876
void * priv_data
Definition: avcodec.h:1690
int chroma_h_shift
Definition: ffv1.h:91
PlaneContext plane[MAX_PLANES]
Definition: ffv1.h:103
int transparency
Definition: ffv1.h:92
static av_always_inline int diff(const uint32_t a, const uint32_t b)
#define av_free(p)
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:3118
struct FFV1Context * fsrc
Definition: ffv1.h:97
int chroma_v_shift
Definition: ffv1.h:91
int top_field_first
If the content is interlaced, is top field displayed first.
Definition: frame.h:323
int len
int chroma_planes
Definition: ffv1.h:90
struct AVCodecInternal * internal
Private context used for internal data.
Definition: avcodec.h:1698
int key_frame
1 -> keyframe, 0-> not
Definition: frame.h:253
struct FFV1Context * slice_context[MAX_SLICES]
Definition: ffv1.h:125
int64_t dts
Decompression timestamp in AVStream->time_base units; the time at which the packet is decompressed...
Definition: avcodec.h:1578
#define av_noinline
Definition: attributes.h:62
#define av_freep(p)
planar YUV 4:4:0 (1 Cr & Cb sample per 1x2 Y samples)
Definition: pixfmt.h:100
enum AVFieldOrder field_order
Field order.
Definition: avcodec.h:2406
#define av_always_inline
Definition: attributes.h:39
#define av_malloc_array(a, b)
#define FFSWAP(type, a, b)
Definition: common.h:99
int ec
Definition: ffv1.h:113
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:367
int num_v_slices
Definition: ffv1.h:128
exp golomb vlc stuff
This structure stores compressed data.
Definition: avcodec.h:1556
static int read_extra_header(FFV1Context *f)
Definition: ffv1dec.c:521
#define AV_GET_BUFFER_FLAG_REF
The decoder will keep a reference to the frame and may reuse it later.
Definition: avcodec.h:1340
AVCodecContext * avctx
Definition: ffv1.h:81
#define AV_CODEC_CAP_DR1
Codec uses get_buffer() for allocating buffers and supports custom allocators.
Definition: avcodec.h:955
int slice_x
Definition: ffv1.h:132
#define AV_PIX_FMT_YUV422P16
Definition: pixfmt.h:353
int64_t pts
Presentation timestamp in AVStream->time_base units; the time at which the decompressed packet will b...
Definition: avcodec.h:1572
#define AV_NOPTS_VALUE
Undefined timestamp value.
Definition: avutil.h:240
AVCodec ff_ffv1_decoder
Definition: ffv1dec.c:1139
int step
Number of elements between 2 horizontally consecutive pixels.
Definition: pixdesc.h:41
int width
Definition: ffv1.h:89
#define AV_PIX_FMT_0RGB32
Definition: pixfmt.h:322
#define AV_CEIL_RSHIFT(a, b)
Definition: common.h:58
int slice_rct_ry_coef
Definition: ffv1.h:137