FFmpeg  4.4
ffv1dec.c
Go to the documentation of this file.
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 
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  }
203  p->context_count = context_count;
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",
222  f->cur->sample_aspect_ratio.num,
223  f->cur->sample_aspect_ratio.den);
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)
256  ff_thread_await_progress(&f->last_picture, si, 0);
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] };
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 
360  ff_thread_report_progress(&f->picture, si, 0);
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 
421  ff_init_range_decoder(c, f->avctx->extradata, f->avctx->extradata_size);
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",
454  f->chroma_h_shift, f->chroma_v_shift);
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++) {
473  f->context_count[i] = read_quant_tables(c, f->quant_tables[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;
501  f->avctx->extradata, f->avctx->extradata_size);
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)
510  av_log(f->avctx, AV_LOG_DEBUG,
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,
515  f->avctx->bits_per_raw_sample,
516  f->chroma_planes, f->chroma_h_shift, f->chroma_v_shift,
517  f->transparency,
518  f->num_h_slices, f->num_v_slices,
519  f->quant_table_count,
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) {
536  int chroma_planes, chroma_h_shift, chroma_v_shift, transparency, colorspace, bits_per_raw_sample;
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;
584  f->avctx->bits_per_raw_sample = bits_per_raw_sample;
585  f->chroma_planes = chroma_planes;
586  f->chroma_h_shift = chroma_h_shift;
587  f->chroma_v_shift = chroma_v_shift;
588  f->transparency = transparency;
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)
596  f->avctx->pix_fmt = AV_PIX_FMT_GRAY8;
597  else if (f->avctx->bits_per_raw_sample == 9) {
598  f->packed_at_lsb = 1;
599  f->avctx->pix_fmt = AV_PIX_FMT_GRAY9;
600  } else if (f->avctx->bits_per_raw_sample == 10) {
601  f->packed_at_lsb = 1;
602  f->avctx->pix_fmt = AV_PIX_FMT_GRAY10;
603  } else if (f->avctx->bits_per_raw_sample == 12) {
604  f->packed_at_lsb = 1;
605  f->avctx->pix_fmt = AV_PIX_FMT_GRAY12;
606  } else if (f->avctx->bits_per_raw_sample == 16) {
607  f->packed_at_lsb = 1;
608  f->avctx->pix_fmt = AV_PIX_FMT_GRAY16;
609  } else if (f->avctx->bits_per_raw_sample < 16) {
610  f->avctx->pix_fmt = AV_PIX_FMT_GRAY16;
611  } else
612  return AVERROR(ENOSYS);
613  } else if (f->transparency && !f->chroma_planes) {
614  if (f->avctx->bits_per_raw_sample <= 8)
615  f->avctx->pix_fmt = AV_PIX_FMT_YA8;
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) {
694  av_log(f->avctx, AV_LOG_ERROR,
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)
699  f->avctx->pix_fmt = AV_PIX_FMT_0RGB32;
700  else if (f->avctx->bits_per_raw_sample <= 8 && f->transparency)
701  f->avctx->pix_fmt = AV_PIX_FMT_RGB32;
702  else if (f->avctx->bits_per_raw_sample == 9 && !f->transparency)
703  f->avctx->pix_fmt = AV_PIX_FMT_GBRP9;
704  else if (f->avctx->bits_per_raw_sample == 10 && !f->transparency)
705  f->avctx->pix_fmt = AV_PIX_FMT_GBRP10;
706  else if (f->avctx->bits_per_raw_sample == 10 && f->transparency)
707  f->avctx->pix_fmt = AV_PIX_FMT_GBRAP10;
708  else if (f->avctx->bits_per_raw_sample == 12 && !f->transparency)
709  f->avctx->pix_fmt = AV_PIX_FMT_GBRP12;
710  else if (f->avctx->bits_per_raw_sample == 12 && f->transparency)
711  f->avctx->pix_fmt = AV_PIX_FMT_GBRAP12;
712  else if (f->avctx->bits_per_raw_sample == 14 && !f->transparency)
713  f->avctx->pix_fmt = AV_PIX_FMT_GBRP14;
714  else if (f->avctx->bits_per_raw_sample == 16 && !f->transparency) {
715  f->avctx->pix_fmt = AV_PIX_FMT_GBRP16;
716  f->use32bit = 1;
717  }
718  else if (f->avctx->bits_per_raw_sample == 16 && f->transparency) {
719  f->avctx->pix_fmt = AV_PIX_FMT_GBRAP16;
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",
732  f->chroma_h_shift, f->chroma_v_shift, f->avctx->pix_fmt);
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  }
739  f->slice_count = f->max_slice_count;
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) {
790  av_log(f->avctx, AV_LOG_ERROR,
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  }
808  p->context_count = context_count;
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)
844  ff_thread_release_buffer(avctx, &f->last_picture);
845  FFSWAP(ThreadFrame, f->picture, f->last_picture);
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) {
892  if (trailer > buf_p - buf) v = INT_MAX;
893  else v = AV_RB24(buf_p-trailer) + trailer;
894  } else v = buf_p - c->bytestream_start;
895  if (buf_p - c->bytestream_start < v) {
896  av_log(avctx, AV_LOG_ERROR, "Slice pointer chain broken\n");
897  ff_thread_report_progress(&f->picture, INT_MAX, 0);
898  return AVERROR_INVALIDDATA;
899  }
900  buf_p -= v;
901 
902  if (f->ec) {
903  unsigned crc = av_crc(av_crc_get_table(AV_CRC_32_IEEE), 0, buf_p, v);
904  if (crc) {
905  int64_t ts = avpkt->pts != AV_NOPTS_VALUE ? avpkt->pts : avpkt->dts;
906  av_log(f->avctx, AV_LOG_ERROR, "slice CRC mismatch %X!", crc);
907  if (ts != AV_NOPTS_VALUE && avctx->pkt_timebase.num) {
908  av_log(f->avctx, AV_LOG_ERROR, "at %f seconds\n", ts*av_q2d(avctx->pkt_timebase));
909  } else if (ts != AV_NOPTS_VALUE) {
910  av_log(f->avctx, AV_LOG_ERROR, "at %"PRId64"\n", ts);
911  } else {
912  av_log(f->avctx, AV_LOG_ERROR, "\n");
913  }
914  fs->slice_damaged = 1;
915  }
916  if (avctx->debug & FF_DEBUG_PICT_INFO) {
917  av_log(avctx, AV_LOG_DEBUG, "slice %d, CRC: 0x%08"PRIX32"\n", i, AV_RB32(buf_p + v - 4));
918  }
919  }
920 
921  if (i) {
922  ff_init_range_decoder(&fs->c, buf_p, v);
923  } else
924  fs->c.bytestream_end = buf_p + v;
925 
926  fs->avctx = avctx;
927  fs->cur = p;
928  }
929 
930  avctx->execute(avctx,
931  decode_slice,
932  &f->slice_context[0],
933  NULL,
934  f->slice_count,
935  sizeof(void*));
936 
937  for (i = f->slice_count - 1; i >= 0; i--) {
938  FFV1Context *fs = f->slice_context[i];
939  int j;
940  if (fs->slice_damaged && f->last_picture.f->data[0]) {
942  const uint8_t *src[4];
943  uint8_t *dst[4];
944  ff_thread_await_progress(&f->last_picture, INT_MAX, 0);
945  for (j = 0; j < desc->nb_components; j++) {
946  int pixshift = desc->comp[j].depth > 8;
947  int sh = (j == 1 || j == 2) ? f->chroma_h_shift : 0;
948  int sv = (j == 1 || j == 2) ? f->chroma_v_shift : 0;
949  dst[j] = p->data[j] + p->linesize[j] *
950  (fs->slice_y >> sv) + ((fs->slice_x >> sh) << pixshift);
951  src[j] = f->last_picture.f->data[j] + f->last_picture.f->linesize[j] *
952  (fs->slice_y >> sv) + ((fs->slice_x >> sh) << pixshift);
953 
954  }
955  if (desc->flags & AV_PIX_FMT_FLAG_PAL ||
956  desc->flags & FF_PSEUDOPAL) {
957  dst[1] = p->data[1];
958  src[1] = f->last_picture.f->data[1];
959  }
960  av_image_copy(dst, p->linesize, src,
961  f->last_picture.f->linesize,
962  avctx->pix_fmt,
963  fs->slice_width,
964  fs->slice_height);
965  }
966  }
967  ff_thread_report_progress(&f->picture, INT_MAX, 0);
968 
969  f->picture_number++;
970 
971  if (f->last_picture.f)
972  ff_thread_release_buffer(avctx, &f->last_picture);
973  f->cur = NULL;
974  if ((ret = av_frame_ref(data, f->picture.f)) < 0)
975  return ret;
976 
977  *got_frame = 1;
978 
979  return buf_size;
980 }
981 
982 static void copy_fields(FFV1Context *fsdst, FFV1Context *fssrc, FFV1Context *fsrc)
983 {
984  fsdst->version = fsrc->version;
985  fsdst->micro_version = fsrc->micro_version;
986  fsdst->chroma_planes = fsrc->chroma_planes;
987  fsdst->chroma_h_shift = fsrc->chroma_h_shift;
988  fsdst->chroma_v_shift = fsrc->chroma_v_shift;
989  fsdst->transparency = fsrc->transparency;
990  fsdst->plane_count = fsrc->plane_count;
991  fsdst->ac = fsrc->ac;
992  fsdst->colorspace = fsrc->colorspace;
993 
994  fsdst->ec = fsrc->ec;
995  fsdst->intra = fsrc->intra;
996  fsdst->slice_damaged = fssrc->slice_damaged;
997  fsdst->key_frame_ok = fsrc->key_frame_ok;
998 
1000  fsdst->packed_at_lsb = fsrc->packed_at_lsb;
1001  fsdst->slice_count = fsrc->slice_count;
1002  if (fsrc->version<3){
1003  fsdst->slice_x = fssrc->slice_x;
1004  fsdst->slice_y = fssrc->slice_y;
1005  fsdst->slice_width = fssrc->slice_width;
1006  fsdst->slice_height = fssrc->slice_height;
1007  }
1008 }
1009 
1010 #if HAVE_THREADS
1011 static int update_thread_context(AVCodecContext *dst, const AVCodecContext *src)
1012 {
1013  FFV1Context *fsrc = src->priv_data;
1014  FFV1Context *fdst = dst->priv_data;
1015  int i, ret;
1016 
1017  if (dst == src)
1018  return 0;
1019 
1020  {
1021  ThreadFrame picture = fdst->picture, last_picture = fdst->last_picture;
1022  uint8_t (*initial_states[MAX_QUANT_TABLES])[32];
1024  memcpy(initial_states, fdst->initial_states, sizeof(fdst->initial_states));
1025  memcpy(slice_context, fdst->slice_context , sizeof(fdst->slice_context));
1026 
1027  memcpy(fdst, fsrc, sizeof(*fdst));
1028  memcpy(fdst->initial_states, initial_states, sizeof(fdst->initial_states));
1029  memcpy(fdst->slice_context, slice_context , sizeof(fdst->slice_context));
1030  fdst->picture = picture;
1031  fdst->last_picture = last_picture;
1032  for (i = 0; i<fdst->num_h_slices * fdst->num_v_slices; i++) {
1033  FFV1Context *fssrc = fsrc->slice_context[i];
1034  FFV1Context *fsdst = fdst->slice_context[i];
1035  copy_fields(fsdst, fssrc, fsrc);
1036  }
1037  av_assert0(!fdst->plane[0].state);
1038  av_assert0(!fdst->sample_buffer);
1039  }
1040 
1042 
1043 
1044  ff_thread_release_buffer(dst, &fdst->picture);
1045  if (fsrc->picture.f->data[0]) {
1046  if ((ret = ff_thread_ref_frame(&fdst->picture, &fsrc->picture)) < 0)
1047  return ret;
1048  }
1049 
1050  fdst->fsrc = fsrc;
1051 
1052  return 0;
1053 }
1054 #endif
1055 
1057  .name = "ffv1",
1058  .long_name = NULL_IF_CONFIG_SMALL("FFmpeg video codec #1"),
1059  .type = AVMEDIA_TYPE_VIDEO,
1060  .id = AV_CODEC_ID_FFV1,
1061  .priv_data_size = sizeof(FFV1Context),
1062  .init = decode_init,
1063  .close = ff_ffv1_close,
1064  .decode = decode_frame,
1065  .update_thread_context = ONLY_IF_THREADS_ENABLED(update_thread_context),
1066  .capabilities = AV_CODEC_CAP_DR1 /*| AV_CODEC_CAP_DRAW_HORIZ_BAND*/ |
1069 };
#define av_noinline
Definition: attributes.h:68
#define av_flatten
Definition: attributes.h:94
#define av_cold
Definition: attributes.h:88
uint8_t
simple assert() macros that are a bit more flexible than ISO C assert().
#define av_assert1(cond)
assert() equivalent, that does not lie in speed critical code.
Definition: avassert.h:53
#define av_assert0(cond)
assert() equivalent, that is always enabled.
Definition: avassert.h:37
Libavcodec external API header.
#define FF_DEBUG_PICT_INFO
Definition: avcodec.h:1624
#define AV_RB24
Definition: intreadwrite.h:64
#define AV_RB32
Definition: intreadwrite.h:130
static av_cold int init(AVCodecContext *avctx)
Definition: avrndec.c:31
#define s(width, name)
Definition: cbs_vp9.c:257
#define f(width, name)
Definition: cbs_vp9.c:255
#define fs(width, name, subs,...)
Definition: cbs_vp9.c:259
static struct @321 state
@ AV_FIELD_TT
Definition: codec_par.h:39
@ AV_FIELD_PROGRESSIVE
Definition: codec_par.h:38
@ AV_FIELD_TB
Definition: codec_par.h:41
#define FFSWAP(type, a, b)
Definition: common.h:108
#define FFMIN(a, b)
Definition: common.h:105
#define AV_CEIL_RSHIFT(a, b)
Definition: common.h:58
#define NULL
Definition: coverity.c:32
Public header for CRC hash function implementation.
static void decode(AVCodecContext *dec_ctx, AVPacket *pkt, AVFrame *frame, FILE *outfile)
Definition: decode_audio.c:71
#define MAX_SLICES
Definition: dxva2_hevc.c:29
av_cold int ff_ffv1_common_init(AVCodecContext *avctx)
Definition: ffv1.c:41
av_cold int ff_ffv1_close(AVCodecContext *avctx)
Definition: ffv1.c:201
int ff_ffv1_allocate_initial_states(FFV1Context *f)
Definition: ffv1.c:158
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
void ff_ffv1_clear_slice_state(FFV1Context *f, FFV1Context *fs)
Definition: ffv1.c:173
FF Video Codec 1 (a lossless codec)
#define CONTEXT_SIZE
Definition: ffv1.h:50
static void update_vlc_state(VlcState *const state, const int v)
Definition: ffv1.h:161
#define AC_GOLOMB_RICE
Definition: ffv1.h:55
#define AC_RANGE_CUSTOM_TAB
Definition: ffv1.h:57
#define MAX_QUANT_TABLES
Definition: ffv1.h:52
static av_always_inline int fold(int diff, int bits)
Definition: ffv1.h:150
#define MAX_CONTEXT_INPUTS
Definition: ffv1.h:53
static int read_header(FFV1Context *f)
Definition: ffv1dec.c:527
static void copy_fields(FFV1Context *fsdst, FFV1Context *fssrc, FFV1Context *fsrc)
Definition: ffv1dec.c:982
AVCodec ff_ffv1_decoder
Definition: ffv1dec.c:1056
static int read_quant_tables(RangeCoder *c, int16_t quant_table[MAX_CONTEXT_INPUTS][256])
Definition: ffv1dec.c:392
static int read_extra_header(FFV1Context *f)
Definition: ffv1dec.c:410
static int read_quant_table(RangeCoder *c, int16_t *quant_table, int scale)
Definition: ffv1dec.c:365
static int get_vlc_symbol(GetBitContext *gb, VlcState *const state, int bits)
Definition: ffv1dec.c:70
static av_noinline int get_symbol(RangeCoder *c, uint8_t *state, int is_signed)
Definition: ffv1dec.c:65
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
static av_cold int decode_init(AVCodecContext *avctx)
Definition: ffv1dec.c:815
static int decode_slice(AVCodecContext *c, void *arg)
Definition: ffv1dec.c:243
static int decode_slice_header(FFV1Context *f, FFV1Context *fs)
Definition: ffv1dec.c:164
static av_flatten int get_symbol_inline(RangeCoder *c, uint8_t *state, int is_signed)
Definition: ffv1dec.c:41
static int is_input_end(FFV1Context *s)
Definition: ffv1dec.c:95
static int decode_frame(AVCodecContext *avctx, void *data, int *got_frame, AVPacket *avpkt)
Definition: ffv1dec.c:832
static av_always_inline int RENAME() decode_line(FFV1Context *s, int w, TYPE *sample[2], int plane_index, int bits)
static int RENAME() decode_rgb_frame(FFV1Context *s, uint8_t *src[4], int w, int h, int stride[4])
#define sample
bitstream reader API header.
static int get_bits_left(GetBitContext *gb)
Definition: get_bits.h:849
static int init_get_bits(GetBitContext *s, const uint8_t *buffer, int bit_size)
Initialize GetBitContext.
Definition: get_bits.h:659
exp golomb vlc stuff
static int get_sr_golomb(GetBitContext *gb, int k, int limit, int esc_len)
read signed golomb rice code (ffv1).
Definition: golomb.h:531
#define AV_CODEC_CAP_DR1
Codec uses get_buffer() or get_encode_buffer() for allocating buffers and supports custom allocators.
Definition: codec.h:52
#define AV_GET_BUFFER_FLAG_REF
The decoder will keep a reference to the frame and may reuse it later.
Definition: avcodec.h:514
#define AV_CODEC_CAP_SLICE_THREADS
Codec supports slice-based (or partition-based) multithreading.
Definition: codec.h:112
#define AV_CODEC_CAP_FRAME_THREADS
Codec supports frame-level multithreading.
Definition: codec.h:108
@ AV_CODEC_ID_FFV1
Definition: codec_id.h:82
const AVCRC * av_crc_get_table(AVCRCId crc_id)
Get an initialized standard CRC table.
Definition: crc.c:374
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
@ AV_CRC_32_IEEE
Definition: crc.h:53
#define AVERROR_INVALIDDATA
Invalid data found when processing input.
Definition: error.h:59
#define AVERROR(e)
Definition: error.h:43
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:443
#define AV_LOG_DEBUG
Stuff which is only useful for libav* developers.
Definition: log.h:215
#define AV_LOG_WARNING
Something somehow does not look correct.
Definition: log.h:200
#define AV_LOG_ERROR
Something went wrong and cannot losslessly be recovered.
Definition: log.h:194
static double av_q2d(AVRational a)
Convert an AVRational to a double.
Definition: rational.h:104
@ AVMEDIA_TYPE_VIDEO
Definition: avutil.h:201
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:422
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:322
@ AV_PICTURE_TYPE_I
Intra.
Definition: avutil.h:274
#define AV_NOPTS_VALUE
Undefined timestamp value.
Definition: avutil.h:248
misc image utilities
int i
Definition: input.c:407
static const int16_t quant_table[64]
Definition: intrax8.c:522
#define MAX_OVERREAD
Definition: lagarithrac.h:51
#define FF_CODEC_CAP_ALLOCATE_PROGRESS
Definition: internal.h:76
#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:49
const char * arg
Definition: jacosubdec.c:66
int ff_thread_ref_frame(ThreadFrame *dst, const ThreadFrame *src)
Definition: utils.c:903
common internal API header
#define NULL_IF_CONFIG_SMALL(x)
Return NULL if CONFIG_SMALL is true, otherwise the argument without modification.
Definition: internal.h:117
#define FF_PSEUDOPAL
Definition: internal.h:299
#define ONLY_IF_THREADS_ENABLED(x)
Define a function with only the non-default version specified.
Definition: internal.h:156
#define emms_c()
Definition: internal.h:54
const char * desc
Definition: libsvtav1.c:79
uint8_t w
Definition: llviddspenc.c:39
static const struct @322 planes[]
int stride
Definition: mace.c:144
const char data[16]
Definition: mxf.c:142
AVOptions.
const AVPixFmtDescriptor * av_pix_fmt_desc_get(enum AVPixelFormat pix_fmt)
Definition: pixdesc.c:2573
#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 AV_PIX_FMT_0RGB32
Definition: pixfmt.h:376
#define AV_PIX_FMT_GBRAP12
Definition: pixfmt.h:420
#define AV_PIX_FMT_YUV420P16
Definition: pixfmt.h:410
#define AV_PIX_FMT_YUV444P12
Definition: pixfmt.h:406
#define AV_PIX_FMT_YUV444P9
Definition: pixfmt.h:398
#define AV_PIX_FMT_YUV420P10
Definition: pixfmt.h:399
#define AV_PIX_FMT_YUV440P12
Definition: pixfmt.h:405
#define AV_PIX_FMT_GRAY9
Definition: pixfmt.h:379
#define AV_PIX_FMT_GBRAP16
Definition: pixfmt.h:421
#define AV_PIX_FMT_GBRP9
Definition: pixfmt.h:414
#define AV_PIX_FMT_YUV422P9
Definition: pixfmt.h:397
#define AV_PIX_FMT_YUVA444P10
Definition: pixfmt.h:438
#define AV_PIX_FMT_YUVA420P16
Definition: pixfmt.h:441
#define AV_PIX_FMT_YUV420P12
Definition: pixfmt.h:403
#define AV_PIX_FMT_YUVA420P10
Definition: pixfmt.h:436
#define AV_PIX_FMT_YUVA422P9
Definition: pixfmt.h:434
#define AV_PIX_FMT_YUV422P12
Definition: pixfmt.h:404
#define AV_PIX_FMT_GBRP10
Definition: pixfmt.h:415
#define AV_PIX_FMT_YUV422P10
Definition: pixfmt.h:400
#define AV_PIX_FMT_GRAY12
Definition: pixfmt.h:381
#define AV_PIX_FMT_GBRP12
Definition: pixfmt.h:416
#define AV_PIX_FMT_YUV420P9
Definition: pixfmt.h:396
#define AV_PIX_FMT_YUVA420P9
Definition: pixfmt.h:433
#define AV_PIX_FMT_YUVA422P10
Definition: pixfmt.h:437
#define AV_PIX_FMT_YUV420P14
Definition: pixfmt.h:407
@ AV_PIX_FMT_NONE
Definition: pixfmt.h:65
@ AV_PIX_FMT_YUV420P
planar YUV 4:2:0, 12bpp, (1 Cr & Cb sample per 2x2 Y samples)
Definition: pixfmt.h:66
@ AV_PIX_FMT_YUV440P
planar YUV 4:4:0 (1 Cr & Cb sample per 1x2 Y samples)
Definition: pixfmt.h:99
@ AV_PIX_FMT_YUV422P
planar YUV 4:2:2, 16bpp, (1 Cr & Cb sample per 2x1 Y samples)
Definition: pixfmt.h:70
@ AV_PIX_FMT_GRAY8
Y , 8bpp.
Definition: pixfmt.h:74
@ AV_PIX_FMT_YUVA420P
planar YUV 4:2:0, 20bpp, (1 Cr & Cb sample per 2x2 Y & A samples)
Definition: pixfmt.h:101
@ AV_PIX_FMT_YUV410P
planar YUV 4:1:0, 9bpp, (1 Cr & Cb sample per 4x4 Y samples)
Definition: pixfmt.h:72
@ AV_PIX_FMT_YUV411P
planar YUV 4:1:1, 12bpp, (1 Cr & Cb sample per 4x1 Y samples)
Definition: pixfmt.h:73
@ AV_PIX_FMT_YUV444P
planar YUV 4:4:4, 24bpp, (1 Cr & Cb sample per 1x1 Y samples)
Definition: pixfmt.h:71
@ AV_PIX_FMT_YUVA444P
planar YUV 4:4:4 32bpp, (1 Cr & Cb sample per 1x1 Y & A samples)
Definition: pixfmt.h:177
@ AV_PIX_FMT_YUVA422P
planar YUV 4:2:2 24bpp, (1 Cr & Cb sample per 2x1 Y & A samples)
Definition: pixfmt.h:176
@ AV_PIX_FMT_YA8
8 bits gray, 8 bits alpha
Definition: pixfmt.h:143
#define AV_PIX_FMT_YUV422P14
Definition: pixfmt.h:408
#define AV_PIX_FMT_GRAY10
Definition: pixfmt.h:380
#define AV_PIX_FMT_YUV422P16
Definition: pixfmt.h:411
#define AV_PIX_FMT_YUV440P10
Definition: pixfmt.h:401
#define AV_PIX_FMT_GRAY16
Definition: pixfmt.h:383
#define AV_PIX_FMT_GBRAP10
Definition: pixfmt.h:419
#define AV_PIX_FMT_YUVA444P16
Definition: pixfmt.h:443
#define AV_PIX_FMT_YUVA422P16
Definition: pixfmt.h:442
#define AV_PIX_FMT_GBRP16
Definition: pixfmt.h:418
#define AV_PIX_FMT_YUV444P14
Definition: pixfmt.h:409
#define AV_PIX_FMT_YUVA444P9
Definition: pixfmt.h:435
#define AV_PIX_FMT_GBRP14
Definition: pixfmt.h:417
#define AV_PIX_FMT_YUV444P16
Definition: pixfmt.h:412
#define AV_PIX_FMT_RGB32
Definition: pixfmt.h:372
#define AV_PIX_FMT_YUV444P10
Definition: pixfmt.h:402
void ff_thread_report_progress(ThreadFrame *f, int n, int field)
Notify later decoding threads when part of their reference picture is ready.
FF_ENABLE_DEPRECATION_WARNINGS int ff_thread_get_buffer(AVCodecContext *avctx, ThreadFrame *f, int flags)
Wrapper around get_buffer() for frame-multithreaded codecs.
void ff_thread_await_progress(ThreadFrame *f, int n, int field)
Wait for earlier decoding threads to finish reference pictures.
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...
void ff_thread_release_buffer(AVCodecContext *avctx, ThreadFrame *f)
Wrapper around release_buffer() frame-for multithreaded codecs.
av_cold void ff_init_range_decoder(RangeCoder *c, const uint8_t *buf, int buf_size)
Definition: rangecoder.c:53
void ff_build_rac_states(RangeCoder *c, int factor, int max_p)
Definition: rangecoder.c:68
Range coder.
static int get_rac(RangeCoder *c, uint8_t *const state)
Definition: rangecoder.h:127
static const float pred[4]
Definition: siprdata.h:259
main external API structure.
Definition: avcodec.h:536
enum AVPixelFormat pix_fmt
Pixel format, see AV_PIX_FMT_xxx.
Definition: avcodec.h:746
int debug
debug
Definition: avcodec.h:1623
AVRational pkt_timebase
Timebase in which pkt_dts/pts and AVPacket.dts/pts are.
Definition: avcodec.h:2085
enum AVFieldOrder field_order
Field order.
Definition: avcodec.h:1193
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:1824
int extradata_size
Definition: avcodec.h:638
void * priv_data
Definition: avcodec.h:563
AVCodec.
Definition: codec.h:197
const char * name
Name of the codec implementation.
Definition: codec.h:204
int step
Number of elements between 2 horizontally consecutive pixels.
Definition: pixdesc.h:41
This structure describes decoded (raw) audio or video data.
Definition: frame.h:318
uint8_t * data[AV_NUM_DATA_POINTERS]
pointer to the picture/channel planes.
Definition: frame.h:332
int key_frame
1 -> keyframe, 0-> not
Definition: frame.h:396
int top_field_first
If the content is interlaced, is top field displayed first.
Definition: frame.h:470
int interlaced_frame
The content of the picture is interlaced.
Definition: frame.h:465
int linesize[AV_NUM_DATA_POINTERS]
For video, size in bytes of each picture line.
Definition: frame.h:349
enum AVPictureType pict_type
Picture type of the frame.
Definition: frame.h:401
This structure stores compressed data.
Definition: packet.h:346
int size
Definition: packet.h:370
int64_t pts
Presentation timestamp in AVStream->time_base units; the time at which the decompressed packet will b...
Definition: packet.h:362
int64_t dts
Decompression timestamp in AVStream->time_base units; the time at which the packet is decompressed.
Definition: packet.h:368
uint8_t * data
Definition: packet.h:369
Descriptor that unambiguously describes how the bits of a pixel are stored in the up to 4 data planes...
Definition: pixdesc.h:81
AVComponentDescriptor comp[4]
Parameters that describe how pixels are packed.
Definition: pixdesc.h:117
Rational number (pair of numerator and denominator).
Definition: rational.h:58
int num
Numerator.
Definition: rational.h:59
int ac
1=range coder <-> 0=golomb rice
Definition: ffv1.h:100
int colorspace
Definition: ffv1.h:109
ThreadFrame picture
Definition: ffv1.h:95
int version
Definition: ffv1.h:86
int transparency
Definition: ffv1.h:91
int slice_damaged
Definition: ffv1.h:117
int num_v_slices
Definition: ffv1.h:130
int max_slice_count
Definition: ffv1.h:129
struct FFV1Context * fsrc
Definition: ffv1.h:96
int chroma_planes
Definition: ffv1.h:89
int num_h_slices
Definition: ffv1.h:131
int plane_count
Definition: ffv1.h:99
PlaneContext plane[MAX_PLANES]
Definition: ffv1.h:102
int slice_count
Definition: ffv1.h:128
int micro_version
Definition: ffv1.h:87
int bits_per_raw_sample
Definition: ffv1.h:121
ThreadFrame last_picture
Definition: ffv1.h:95
int16_t * sample_buffer
Definition: ffv1.h:110
struct FFV1Context * slice_context[MAX_SLICES]
Definition: ffv1.h:127
int chroma_h_shift
Definition: ffv1.h:90
int key_frame_ok
Definition: ffv1.h:118
int slice_x
Definition: ffv1.h:134
int packed_at_lsb
Definition: ffv1.h:122
int slice_height
Definition: ffv1.h:133
int chroma_v_shift
Definition: ffv1.h:90
int ec
Definition: ffv1.h:115
int slice_y
Definition: ffv1.h:135
int intra
Definition: ffv1.h:116
int slice_width
Definition: ffv1.h:132
uint8_t(*[MAX_QUANT_TABLES] initial_states)[32]
Definition: ffv1.h:107
VlcState * vlc_state
Definition: ffv1.h:72
int16_t quant_table[MAX_CONTEXT_INPUTS][256]
Definition: ffv1.h:68
int quant_table_index
Definition: ffv1.h:69
int context_count
Definition: ffv1.h:70
uint8_t(* state)[CONTEXT_SIZE]
Definition: ffv1.h:71
AVFrame * f
Definition: thread.h:35
Definition: ffv1.h:60
#define av_free(p)
#define av_malloc_array(a, b)
#define ff_dlog(a,...)
#define av_freep(p)
#define av_log(a,...)
#define src
Definition: vp8dsp.c:255
enum AVPictureType last_picture
Definition: movenc.c:69
#define height
#define width
int size
else temp
Definition: vf_mcdeint.c:259
if(ret< 0)
Definition: vf_mcdeint.c:282
int len
uint8_t bits
Definition: vp3data.h:141
static double c[64]