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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 
53  a = 1;
54  for (i = e - 1; i >= 0; i--)
55  a += a + get_rac(c, state + 22 + FFMIN(i, 9)); // 22..31
56 
57  e = -(is_signed && get_rac(c, state + 11 + FFMIN(e, 10))); // 11..21
58  return (a ^ e) - e;
59  }
60 }
61 
62 static av_noinline int get_symbol(RangeCoder *c, uint8_t *state, int is_signed)
63 {
64  return get_symbol_inline(c, state, is_signed);
65 }
66 
67 static inline int get_vlc_symbol(GetBitContext *gb, VlcState *const state,
68  int bits)
69 {
70  int k, i, v, ret;
71 
72  i = state->count;
73  k = 0;
74  while (i < state->error_sum) { // FIXME: optimize
75  k++;
76  i += i;
77  }
78 
79  v = get_sr_golomb(gb, k, 12, bits);
80  av_dlog(NULL, "v:%d bias:%d error:%d drift:%d count:%d k:%d",
81  v, state->bias, state->error_sum, state->drift, state->count, k);
82 
83 #if 0 // JPEG LS
84  if (k == 0 && 2 * state->drift <= -state->count)
85  v ^= (-1);
86 #else
87  v ^= ((2 * state->drift + state->count) >> 31);
88 #endif
89 
90  ret = fold(v + state->bias, bits);
91 
92  update_vlc_state(state, v);
93 
94  return ret;
95 }
96 
98  int16_t *sample[2],
99  int plane_index, int bits)
100 {
101  PlaneContext *const p = &s->plane[plane_index];
102  RangeCoder *const c = &s->c;
103  int x;
104  int run_count = 0;
105  int run_mode = 0;
106  int run_index = s->run_index;
107 
108  if (s->slice_coding_mode == 1) {
109  int i;
110  for (x = 0; x < w; x++) {
111  int v = 0;
112  for (i=0; i<bits; i++) {
113  uint8_t state = 128;
114  v += v + get_rac(c, &state);
115  }
116  sample[1][x] = v;
117  }
118  return;
119  }
120 
121  for (x = 0; x < w; x++) {
122  int diff, context, sign;
123 
124  context = get_context(p, sample[1] + x, sample[0] + x, sample[1] + x);
125  if (context < 0) {
126  context = -context;
127  sign = 1;
128  } else
129  sign = 0;
130 
131  av_assert2(context < p->context_count);
132 
133  if (s->ac) {
134  diff = get_symbol_inline(c, p->state[context], 1);
135  } else {
136  if (context == 0 && run_mode == 0)
137  run_mode = 1;
138 
139  if (run_mode) {
140  if (run_count == 0 && run_mode == 1) {
141  if (get_bits1(&s->gb)) {
142  run_count = 1 << ff_log2_run[run_index];
143  if (x + run_count <= w)
144  run_index++;
145  } else {
146  if (ff_log2_run[run_index])
147  run_count = get_bits(&s->gb, ff_log2_run[run_index]);
148  else
149  run_count = 0;
150  if (run_index)
151  run_index--;
152  run_mode = 2;
153  }
154  }
155  run_count--;
156  if (run_count < 0) {
157  run_mode = 0;
158  run_count = 0;
159  diff = get_vlc_symbol(&s->gb, &p->vlc_state[context],
160  bits);
161  if (diff >= 0)
162  diff++;
163  } else
164  diff = 0;
165  } else
166  diff = get_vlc_symbol(&s->gb, &p->vlc_state[context], bits);
167 
168  av_dlog(s->avctx, "count:%d index:%d, mode:%d, x:%d pos:%d\n",
169  run_count, run_index, run_mode, x, get_bits_count(&s->gb));
170  }
171 
172  if (sign)
173  diff = -diff;
174 
175  sample[1][x] = (predict(sample[1] + x, sample[0] + x) + diff) &
176  ((1 << bits) - 1);
177  }
178  s->run_index = run_index;
179 }
180 
182  int w, int h, int stride, int plane_index)
183 {
184  int x, y;
185  int16_t *sample[2];
186  sample[0] = s->sample_buffer + 3;
187  sample[1] = s->sample_buffer + w + 6 + 3;
188 
189  s->run_index = 0;
190 
191  memset(s->sample_buffer, 0, 2 * (w + 6) * sizeof(*s->sample_buffer));
192 
193  for (y = 0; y < h; y++) {
194  int16_t *temp = sample[0]; // FIXME: try a normal buffer
195 
196  sample[0] = sample[1];
197  sample[1] = temp;
198 
199  sample[1][-1] = sample[0][0];
200  sample[0][w] = sample[0][w - 1];
201 
202 // { START_TIMER
203  if (s->avctx->bits_per_raw_sample <= 8) {
204  decode_line(s, w, sample, plane_index, 8);
205  for (x = 0; x < w; x++)
206  src[x + stride * y] = sample[1][x];
207  } else {
208  decode_line(s, w, sample, plane_index, s->avctx->bits_per_raw_sample);
209  if (s->packed_at_lsb) {
210  for (x = 0; x < w; x++) {
211  ((uint16_t*)(src + stride*y))[x] = sample[1][x];
212  }
213  } else {
214  for (x = 0; x < w; x++) {
215  ((uint16_t*)(src + stride*y))[x] = sample[1][x] << (16 - s->avctx->bits_per_raw_sample);
216  }
217  }
218  }
219 // STOP_TIMER("decode-line") }
220  }
221 }
222 
223 static void decode_rgb_frame(FFV1Context *s, uint8_t *src[3], int w, int h, int stride[3])
224 {
225  int x, y, p;
226  int16_t *sample[4][2];
227  int lbd = s->avctx->bits_per_raw_sample <= 8;
228  int bits = s->avctx->bits_per_raw_sample > 0 ? s->avctx->bits_per_raw_sample : 8;
229  int offset = 1 << bits;
230 
231  for (x = 0; x < 4; x++) {
232  sample[x][0] = s->sample_buffer + x * 2 * (w + 6) + 3;
233  sample[x][1] = s->sample_buffer + (x * 2 + 1) * (w + 6) + 3;
234  }
235 
236  s->run_index = 0;
237 
238  memset(s->sample_buffer, 0, 8 * (w + 6) * sizeof(*s->sample_buffer));
239 
240  for (y = 0; y < h; y++) {
241  for (p = 0; p < 3 + s->transparency; p++) {
242  int16_t *temp = sample[p][0]; // FIXME: try a normal buffer
243 
244  sample[p][0] = sample[p][1];
245  sample[p][1] = temp;
246 
247  sample[p][1][-1]= sample[p][0][0 ];
248  sample[p][0][ w]= sample[p][0][w-1];
249  if (lbd && s->slice_coding_mode == 0)
250  decode_line(s, w, sample[p], (p + 1)/2, 9);
251  else
252  decode_line(s, w, sample[p], (p + 1)/2, bits + (s->slice_coding_mode != 1));
253  }
254  for (x = 0; x < w; x++) {
255  int g = sample[0][1][x];
256  int b = sample[1][1][x];
257  int r = sample[2][1][x];
258  int a = sample[3][1][x];
259 
260  if (s->slice_coding_mode != 1) {
261  b -= offset;
262  r -= offset;
263  g -= (b * s->slice_rct_by_coef + r * s->slice_rct_ry_coef) >> 2;
264  b += g;
265  r += g;
266  }
267 
268  if (lbd)
269  *((uint32_t*)(src[0] + x*4 + stride[0]*y)) = b + (g<<8) + (r<<16) + (a<<24);
270  else {
271  *((uint16_t*)(src[0] + x*2 + stride[0]*y)) = b;
272  *((uint16_t*)(src[1] + x*2 + stride[1]*y)) = g;
273  *((uint16_t*)(src[2] + x*2 + stride[2]*y)) = r;
274  }
275  }
276  }
277 }
278 
280 {
281  RangeCoder *c = &fs->c;
283  unsigned ps, i, context_count;
284  memset(state, 128, sizeof(state));
285 
286  av_assert0(f->version > 2);
287 
288  fs->slice_x = get_symbol(c, state, 0) * f->width ;
289  fs->slice_y = get_symbol(c, state, 0) * f->height;
290  fs->slice_width = (get_symbol(c, state, 0) + 1) * f->width + fs->slice_x;
291  fs->slice_height = (get_symbol(c, state, 0) + 1) * f->height + fs->slice_y;
292 
293  fs->slice_x /= f->num_h_slices;
294  fs->slice_y /= f->num_v_slices;
295  fs->slice_width = fs->slice_width /f->num_h_slices - fs->slice_x;
296  fs->slice_height = fs->slice_height/f->num_v_slices - fs->slice_y;
297  if ((unsigned)fs->slice_width > f->width || (unsigned)fs->slice_height > f->height)
298  return -1;
299  if ( (unsigned)fs->slice_x + (uint64_t)fs->slice_width > f->width
300  || (unsigned)fs->slice_y + (uint64_t)fs->slice_height > f->height)
301  return -1;
302 
303  for (i = 0; i < f->plane_count; i++) {
304  PlaneContext * const p = &fs->plane[i];
305  int idx = get_symbol(c, state, 0);
306  if (idx > (unsigned)f->quant_table_count) {
307  av_log(f->avctx, AV_LOG_ERROR, "quant_table_index out of range\n");
308  return -1;
309  }
310  p->quant_table_index = idx;
311  memcpy(p->quant_table, f->quant_tables[idx], sizeof(p->quant_table));
312  context_count = f->context_count[idx];
313 
314  if (p->context_count < context_count) {
315  av_freep(&p->state);
316  av_freep(&p->vlc_state);
317  }
319  }
320 
321  ps = get_symbol(c, state, 0);
322  if (ps == 1) {
323  f->cur->interlaced_frame = 1;
324  f->cur->top_field_first = 1;
325  } else if (ps == 2) {
326  f->cur->interlaced_frame = 1;
327  f->cur->top_field_first = 0;
328  } else if (ps == 3) {
329  f->cur->interlaced_frame = 0;
330  }
331  f->cur->sample_aspect_ratio.num = get_symbol(c, state, 0);
332  f->cur->sample_aspect_ratio.den = get_symbol(c, state, 0);
333 
334  if (av_image_check_sar(f->width, f->height,
335  f->cur->sample_aspect_ratio) < 0) {
336  av_log(f->avctx, AV_LOG_WARNING, "ignoring invalid SAR: %u/%u\n",
339  f->cur->sample_aspect_ratio = (AVRational){ 0, 1 };
340  }
341 
342  if (fs->version > 3) {
343  fs->slice_reset_contexts = get_rac(c, state);
344  fs->slice_coding_mode = get_symbol(c, state, 0);
345  if (fs->slice_coding_mode != 1) {
346  fs->slice_rct_by_coef = get_symbol(c, state, 0);
347  fs->slice_rct_ry_coef = get_symbol(c, state, 0);
348  if ((uint64_t)fs->slice_rct_by_coef + (uint64_t)fs->slice_rct_ry_coef > 4) {
349  av_log(f->avctx, AV_LOG_ERROR, "slice_rct_y_coef out of range\n");
350  return AVERROR_INVALIDDATA;
351  }
352  }
353  }
354 
355  return 0;
356 }
357 
358 static int decode_slice(AVCodecContext *c, void *arg)
359 {
360  FFV1Context *fs = *(void **)arg;
361  FFV1Context *f = fs->avctx->priv_data;
362  int width, height, x, y, ret;
363  const int ps = av_pix_fmt_desc_get(c->pix_fmt)->comp[0].step_minus1 + 1;
364  AVFrame * const p = f->cur;
365  int i, si;
366 
367  for( si=0; fs != f->slice_context[si]; si ++)
368  ;
369 
370  if(f->fsrc && !p->key_frame)
372 
373  if(f->fsrc && !p->key_frame) {
374  FFV1Context *fssrc = f->fsrc->slice_context[si];
375  FFV1Context *fsdst = f->slice_context[si];
376  av_assert1(fsdst->plane_count == fssrc->plane_count);
377  av_assert1(fsdst == fs);
378 
379  if (!p->key_frame)
380  fsdst->slice_damaged |= fssrc->slice_damaged;
381 
382  for (i = 0; i < f->plane_count; i++) {
383  PlaneContext *psrc = &fssrc->plane[i];
384  PlaneContext *pdst = &fsdst->plane[i];
385 
386  av_free(pdst->state);
387  av_free(pdst->vlc_state);
388  memcpy(pdst, psrc, sizeof(*pdst));
389  pdst->state = NULL;
390  pdst->vlc_state = NULL;
391 
392  if (fssrc->ac) {
394  memcpy(pdst->state, psrc->state, CONTEXT_SIZE * psrc->context_count);
395  } else {
396  pdst->vlc_state = av_malloc_array(sizeof(*pdst->vlc_state), psrc->context_count);
397  memcpy(pdst->vlc_state, psrc->vlc_state, sizeof(*pdst->vlc_state) * psrc->context_count);
398  }
399  }
400  }
401 
402  fs->slice_rct_by_coef = 1;
403  fs->slice_rct_ry_coef = 1;
404 
405  if (f->version > 2) {
406  if (ffv1_init_slice_state(f, fs) < 0)
407  return AVERROR(ENOMEM);
408  if (decode_slice_header(f, fs) < 0) {
409  fs->slice_damaged = 1;
410  return AVERROR_INVALIDDATA;
411  }
412  }
413  if ((ret = ffv1_init_slice_state(f, fs)) < 0)
414  return ret;
415  if (f->cur->key_frame || fs->slice_reset_contexts)
416  ffv1_clear_slice_state(f, fs);
417 
418  width = fs->slice_width;
419  height = fs->slice_height;
420  x = fs->slice_x;
421  y = fs->slice_y;
422 
423  if (!fs->ac) {
424  if (f->version == 3 && f->micro_version > 1 || f->version > 3)
425  get_rac(&fs->c, (uint8_t[]) { 129 });
426  fs->ac_byte_count = f->version > 2 || (!x && !y) ? fs->c.bytestream - fs->c.bytestream_start - 1 : 0;
427  init_get_bits(&fs->gb,
428  fs->c.bytestream_start + fs->ac_byte_count,
429  (fs->c.bytestream_end - fs->c.bytestream_start - fs->ac_byte_count) * 8);
430  }
431 
432  av_assert1(width && height);
433  if (f->colorspace == 0) {
434  const int chroma_width = FF_CEIL_RSHIFT(width, f->chroma_h_shift);
435  const int chroma_height = FF_CEIL_RSHIFT(height, f->chroma_v_shift);
436  const int cx = x >> f->chroma_h_shift;
437  const int cy = y >> f->chroma_v_shift;
438  decode_plane(fs, p->data[0] + ps*x + y*p->linesize[0], width, height, p->linesize[0], 0);
439 
440  if (f->chroma_planes) {
441  decode_plane(fs, p->data[1] + ps*cx+cy*p->linesize[1], chroma_width, chroma_height, p->linesize[1], 1);
442  decode_plane(fs, p->data[2] + ps*cx+cy*p->linesize[2], chroma_width, chroma_height, p->linesize[2], 1);
443  }
444  if (fs->transparency)
445  decode_plane(fs, p->data[3] + ps*x + y*p->linesize[3], width, height, p->linesize[3], 2);
446  } else {
447  uint8_t *planes[3] = { p->data[0] + ps * x + y * p->linesize[0],
448  p->data[1] + ps * x + y * p->linesize[1],
449  p->data[2] + ps * x + y * p->linesize[2] };
450  decode_rgb_frame(fs, planes, width, height, p->linesize);
451  }
452  if (fs->ac && f->version > 2) {
453  int v;
454  get_rac(&fs->c, (uint8_t[]) { 129 });
455  v = fs->c.bytestream_end - fs->c.bytestream - 2 - 5*f->ec;
456  if (v) {
457  av_log(f->avctx, AV_LOG_ERROR, "bytestream end mismatching by %d\n", v);
458  fs->slice_damaged = 1;
459  }
460  }
461 
462  emms_c();
463 
464  ff_thread_report_progress(&f->picture, si, 0);
465 
466  return 0;
467 }
468 
469 static int read_quant_table(RangeCoder *c, int16_t *quant_table, int scale)
470 {
471  int v;
472  int i = 0;
474 
475  memset(state, 128, sizeof(state));
476 
477  for (v = 0; i < 128; v++) {
478  unsigned len = get_symbol(c, state, 0) + 1;
479 
480  if (len > 128 - i)
481  return AVERROR_INVALIDDATA;
482 
483  while (len--) {
484  quant_table[i] = scale * v;
485  i++;
486  }
487  }
488 
489  for (i = 1; i < 128; i++)
490  quant_table[256 - i] = -quant_table[i];
491  quant_table[128] = -quant_table[127];
492 
493  return 2 * v - 1;
494 }
495 
497  int16_t quant_table[MAX_CONTEXT_INPUTS][256])
498 {
499  int i;
500  int context_count = 1;
501 
502  for (i = 0; i < 5; i++) {
503  context_count *= read_quant_table(c, quant_table[i], context_count);
504  if (context_count > 32768U) {
505  return AVERROR_INVALIDDATA;
506  }
507  }
508  return (context_count + 1) / 2;
509 }
510 
512 {
513  RangeCoder *const c = &f->c;
515  int i, j, k, ret;
516  uint8_t state2[32][CONTEXT_SIZE];
517 
518  memset(state2, 128, sizeof(state2));
519  memset(state, 128, sizeof(state));
520 
522  ff_build_rac_states(c, 0.05 * (1LL << 32), 256 - 8);
523 
524  f->version = get_symbol(c, state, 0);
525  if (f->version < 2) {
526  av_log(f->avctx, AV_LOG_ERROR, "Invalid version in global header\n");
527  return AVERROR_INVALIDDATA;
528  }
529  if (f->version > 2) {
530  c->bytestream_end -= 4;
531  f->micro_version = get_symbol(c, state, 0);
532  }
533  f->ac = f->avctx->coder_type = get_symbol(c, state, 0);
534  if (f->ac > 1) {
535  for (i = 1; i < 256; i++)
536  f->state_transition[i] = get_symbol(c, state, 1) + c->one_state[i];
537  }
538 
539  f->colorspace = get_symbol(c, state, 0); //YUV cs type
540  f->avctx->bits_per_raw_sample = get_symbol(c, state, 0);
541  f->chroma_planes = get_rac(c, state);
542  f->chroma_h_shift = get_symbol(c, state, 0);
543  f->chroma_v_shift = get_symbol(c, state, 0);
544  f->transparency = get_rac(c, state);
545  f->plane_count = 1 + (f->chroma_planes || f->version<4) + f->transparency;
546  f->num_h_slices = 1 + get_symbol(c, state, 0);
547  f->num_v_slices = 1 + get_symbol(c, state, 0);
548 
549  if (f->num_h_slices > (unsigned)f->width || !f->num_h_slices ||
550  f->num_v_slices > (unsigned)f->height || !f->num_v_slices
551  ) {
552  av_log(f->avctx, AV_LOG_ERROR, "slice count invalid\n");
553  return AVERROR_INVALIDDATA;
554  }
555 
556  f->quant_table_count = get_symbol(c, state, 0);
557  if (f->quant_table_count > (unsigned)MAX_QUANT_TABLES)
558  return AVERROR_INVALIDDATA;
559 
560  for (i = 0; i < f->quant_table_count; i++) {
561  f->context_count[i] = read_quant_tables(c, f->quant_tables[i]);
562  if (f->context_count[i] < 0) {
563  av_log(f->avctx, AV_LOG_ERROR, "read_quant_table error\n");
564  return AVERROR_INVALIDDATA;
565  }
566  }
567  if ((ret = ffv1_allocate_initial_states(f)) < 0)
568  return ret;
569 
570  for (i = 0; i < f->quant_table_count; i++)
571  if (get_rac(c, state)) {
572  for (j = 0; j < f->context_count[i]; j++)
573  for (k = 0; k < CONTEXT_SIZE; k++) {
574  int pred = j ? f->initial_states[i][j - 1][k] : 128;
575  f->initial_states[i][j][k] =
576  (pred + get_symbol(c, state2[k], 1)) & 0xFF;
577  }
578  }
579 
580  if (f->version > 2) {
581  f->ec = get_symbol(c, state, 0);
582  if (f->micro_version > 2)
583  f->intra = get_symbol(c, state, 0);
584  }
585 
586  if (f->version > 2) {
587  unsigned v;
590  if (v) {
591  av_log(f->avctx, AV_LOG_ERROR, "CRC mismatch %X!\n", v);
592  return AVERROR_INVALIDDATA;
593  }
594  }
595 
596  if (f->avctx->debug & FF_DEBUG_PICT_INFO)
598  "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\n",
599  f->version, f->micro_version,
600  f->ac,
601  f->colorspace,
604  f->transparency,
605  f->num_h_slices, f->num_v_slices,
607  f->ec,
608  f->intra
609  );
610  return 0;
611 }
612 
613 static int read_header(FFV1Context *f)
614 {
616  int i, j, context_count = -1; //-1 to avoid warning
617  RangeCoder *const c = &f->slice_context[0]->c;
618 
619  memset(state, 128, sizeof(state));
620 
621  if (f->version < 2) {
623  unsigned v= get_symbol(c, state, 0);
624  if (v >= 2) {
625  av_log(f->avctx, AV_LOG_ERROR, "invalid version %d in ver01 header\n", v);
626  return AVERROR_INVALIDDATA;
627  }
628  f->version = v;
629  f->ac = f->avctx->coder_type = get_symbol(c, state, 0);
630  if (f->ac > 1) {
631  for (i = 1; i < 256; i++)
632  f->state_transition[i] = get_symbol(c, state, 1) + c->one_state[i];
633  }
634 
635  colorspace = get_symbol(c, state, 0); //YUV cs type
636  bits_per_raw_sample = f->version > 0 ? get_symbol(c, state, 0) : f->avctx->bits_per_raw_sample;
637  chroma_planes = get_rac(c, state);
638  chroma_h_shift = get_symbol(c, state, 0);
639  chroma_v_shift = get_symbol(c, state, 0);
640  transparency = get_rac(c, state);
641 
642  if (f->plane_count) {
643  if (colorspace != f->colorspace ||
644  bits_per_raw_sample != f->avctx->bits_per_raw_sample ||
645  chroma_planes != f->chroma_planes ||
646  chroma_h_shift != f->chroma_h_shift ||
647  chroma_v_shift != f->chroma_v_shift ||
648  transparency != f->transparency) {
649  av_log(f->avctx, AV_LOG_ERROR, "Invalid change of global parameters\n");
650  return AVERROR_INVALIDDATA;
651  }
652  }
653 
654  f->colorspace = colorspace;
660 
661  f->plane_count = 2 + f->transparency;
662  }
663 
664  if (f->colorspace == 0) {
665  if (f->avctx->skip_alpha) f->transparency = 0;
666  if (!f->transparency && !f->chroma_planes) {
667  if (f->avctx->bits_per_raw_sample <= 8)
669  else
671  } else if (f->avctx->bits_per_raw_sample<=8 && !f->transparency) {
672  switch(16 * f->chroma_h_shift + f->chroma_v_shift) {
673  case 0x00: f->avctx->pix_fmt = AV_PIX_FMT_YUV444P; break;
674  case 0x01: f->avctx->pix_fmt = AV_PIX_FMT_YUV440P; break;
675  case 0x10: f->avctx->pix_fmt = AV_PIX_FMT_YUV422P; break;
676  case 0x11: f->avctx->pix_fmt = AV_PIX_FMT_YUV420P; break;
677  case 0x20: f->avctx->pix_fmt = AV_PIX_FMT_YUV411P; break;
678  case 0x22: f->avctx->pix_fmt = AV_PIX_FMT_YUV410P; break;
679  }
680  } else if (f->avctx->bits_per_raw_sample <= 8 && f->transparency) {
681  switch(16*f->chroma_h_shift + f->chroma_v_shift) {
682  case 0x00: f->avctx->pix_fmt = AV_PIX_FMT_YUVA444P; break;
683  case 0x10: f->avctx->pix_fmt = AV_PIX_FMT_YUVA422P; break;
684  case 0x11: f->avctx->pix_fmt = AV_PIX_FMT_YUVA420P; break;
685  }
686  } else if (f->avctx->bits_per_raw_sample == 9 && !f->transparency) {
687  f->packed_at_lsb = 1;
688  switch(16 * f->chroma_h_shift + f->chroma_v_shift) {
689  case 0x00: f->avctx->pix_fmt = AV_PIX_FMT_YUV444P9; break;
690  case 0x10: f->avctx->pix_fmt = AV_PIX_FMT_YUV422P9; break;
691  case 0x11: f->avctx->pix_fmt = AV_PIX_FMT_YUV420P9; break;
692  }
693  } else if (f->avctx->bits_per_raw_sample == 9 && f->transparency) {
694  f->packed_at_lsb = 1;
695  switch(16 * f->chroma_h_shift + f->chroma_v_shift) {
696  case 0x00: f->avctx->pix_fmt = AV_PIX_FMT_YUVA444P9; break;
697  case 0x10: f->avctx->pix_fmt = AV_PIX_FMT_YUVA422P9; break;
698  case 0x11: f->avctx->pix_fmt = AV_PIX_FMT_YUVA420P9; break;
699  }
700  } else if (f->avctx->bits_per_raw_sample == 10 && !f->transparency) {
701  f->packed_at_lsb = 1;
702  switch(16 * f->chroma_h_shift + f->chroma_v_shift) {
703  case 0x00: f->avctx->pix_fmt = AV_PIX_FMT_YUV444P10; break;
704  case 0x10: f->avctx->pix_fmt = AV_PIX_FMT_YUV422P10; break;
705  case 0x11: f->avctx->pix_fmt = AV_PIX_FMT_YUV420P10; break;
706  }
707  } else if (f->avctx->bits_per_raw_sample == 10 && f->transparency) {
708  f->packed_at_lsb = 1;
709  switch(16 * f->chroma_h_shift + f->chroma_v_shift) {
710  case 0x00: f->avctx->pix_fmt = AV_PIX_FMT_YUVA444P10; break;
711  case 0x10: f->avctx->pix_fmt = AV_PIX_FMT_YUVA422P10; break;
712  case 0x11: f->avctx->pix_fmt = AV_PIX_FMT_YUVA420P10; break;
713  }
714  } else if (f->avctx->bits_per_raw_sample == 16 && !f->transparency){
715  switch(16 * f->chroma_h_shift + f->chroma_v_shift) {
716  case 0x00: f->avctx->pix_fmt = AV_PIX_FMT_YUV444P16; break;
717  case 0x10: f->avctx->pix_fmt = AV_PIX_FMT_YUV422P16; break;
718  case 0x11: f->avctx->pix_fmt = AV_PIX_FMT_YUV420P16; break;
719  }
720  } else if (f->avctx->bits_per_raw_sample == 16 && f->transparency){
721  switch(16 * f->chroma_h_shift + f->chroma_v_shift) {
722  case 0x00: f->avctx->pix_fmt = AV_PIX_FMT_YUVA444P16; break;
723  case 0x10: f->avctx->pix_fmt = AV_PIX_FMT_YUVA422P16; break;
724  case 0x11: f->avctx->pix_fmt = AV_PIX_FMT_YUVA420P16; break;
725  }
726  }
727  } else if (f->colorspace == 1) {
728  if (f->chroma_h_shift || f->chroma_v_shift) {
730  "chroma subsampling not supported in this colorspace\n");
731  return AVERROR(ENOSYS);
732  }
733  if ( f->avctx->bits_per_raw_sample == 9)
735  else if (f->avctx->bits_per_raw_sample == 10)
737  else if (f->avctx->bits_per_raw_sample == 12)
739  else if (f->avctx->bits_per_raw_sample == 14)
741  else
743  else f->avctx->pix_fmt = AV_PIX_FMT_0RGB32;
744  } else {
745  av_log(f->avctx, AV_LOG_ERROR, "colorspace not supported\n");
746  return AVERROR(ENOSYS);
747  }
748  if (f->avctx->pix_fmt == AV_PIX_FMT_NONE) {
749  av_log(f->avctx, AV_LOG_ERROR, "format not supported\n");
750  return AVERROR(ENOSYS);
751  }
752 
753  av_dlog(f->avctx, "%d %d %d\n",
755  if (f->version < 2) {
756  context_count = read_quant_tables(c, f->quant_table);
757  if (context_count < 0) {
758  av_log(f->avctx, AV_LOG_ERROR, "read_quant_table error\n");
759  return AVERROR_INVALIDDATA;
760  }
761  } else if (f->version < 3) {
762  f->slice_count = get_symbol(c, state, 0);
763  } else {
764  const uint8_t *p = c->bytestream_end;
765  for (f->slice_count = 0;
766  f->slice_count < MAX_SLICES && 3 < p - c->bytestream_start;
767  f->slice_count++) {
768  int trailer = 3 + 5*!!f->ec;
769  int size = AV_RB24(p-trailer);
770  if (size + trailer > p - c->bytestream_start)
771  break;
772  p -= size + trailer;
773  }
774  }
775  if (f->slice_count > (unsigned)MAX_SLICES || f->slice_count <= 0) {
776  av_log(f->avctx, AV_LOG_ERROR, "slice count %d is invalid\n", f->slice_count);
777  return AVERROR_INVALIDDATA;
778  }
779 
780  for (j = 0; j < f->slice_count; j++) {
781  FFV1Context *fs = f->slice_context[j];
782  fs->ac = f->ac;
783  fs->packed_at_lsb = f->packed_at_lsb;
784 
785  fs->slice_damaged = 0;
786 
787  if (f->version == 2) {
788  fs->slice_x = get_symbol(c, state, 0) * f->width ;
789  fs->slice_y = get_symbol(c, state, 0) * f->height;
790  fs->slice_width = (get_symbol(c, state, 0) + 1) * f->width + fs->slice_x;
791  fs->slice_height = (get_symbol(c, state, 0) + 1) * f->height + fs->slice_y;
792 
793  fs->slice_x /= f->num_h_slices;
794  fs->slice_y /= f->num_v_slices;
795  fs->slice_width = fs->slice_width / f->num_h_slices - fs->slice_x;
796  fs->slice_height = fs->slice_height / f->num_v_slices - fs->slice_y;
797  if ((unsigned)fs->slice_width > f->width ||
798  (unsigned)fs->slice_height > f->height)
799  return AVERROR_INVALIDDATA;
800  if ( (unsigned)fs->slice_x + (uint64_t)fs->slice_width > f->width
801  || (unsigned)fs->slice_y + (uint64_t)fs->slice_height > f->height)
802  return AVERROR_INVALIDDATA;
803  }
804 
805  for (i = 0; i < f->plane_count; i++) {
806  PlaneContext *const p = &fs->plane[i];
807 
808  if (f->version == 2) {
809  int idx = get_symbol(c, state, 0);
810  if (idx > (unsigned)f->quant_table_count) {
812  "quant_table_index out of range\n");
813  return AVERROR_INVALIDDATA;
814  }
815  p->quant_table_index = idx;
816  memcpy(p->quant_table, f->quant_tables[idx],
817  sizeof(p->quant_table));
818  context_count = f->context_count[idx];
819  } else {
820  memcpy(p->quant_table, f->quant_table, sizeof(p->quant_table));
821  }
822 
823  if (f->version <= 2) {
824  av_assert0(context_count >= 0);
825  if (p->context_count < context_count) {
826  av_freep(&p->state);
827  av_freep(&p->vlc_state);
828  }
830  }
831  }
832  }
833  return 0;
834 }
835 
837 {
838  FFV1Context *f = avctx->priv_data;
839  int ret;
840 
841  if ((ret = ffv1_common_init(avctx)) < 0)
842  return ret;
843 
844  if (avctx->extradata && (ret = read_extra_header(f)) < 0)
845  return ret;
846 
847  if ((ret = ffv1_init_slice_contexts(f)) < 0)
848  return ret;
849 
850  avctx->internal->allocate_progress = 1;
851 
852  return 0;
853 }
854 
855 static int decode_frame(AVCodecContext *avctx, void *data, int *got_frame, AVPacket *avpkt)
856 {
857  const uint8_t *buf = avpkt->data;
858  int buf_size = avpkt->size;
859  FFV1Context *f = avctx->priv_data;
860  RangeCoder *const c = &f->slice_context[0]->c;
861  int i, ret;
862  uint8_t keystate = 128;
863  const uint8_t *buf_p;
864  AVFrame *p;
865 
866  if (f->last_picture.f)
869 
870  f->cur = p = f->picture.f;
871 
872  if (f->version < 3 && avctx->field_order > AV_FIELD_PROGRESSIVE) {
873  /* we have interlaced material flagged in container */
874  p->interlaced_frame = 1;
875  if (avctx->field_order == AV_FIELD_TT || avctx->field_order == AV_FIELD_TB)
876  p->top_field_first = 1;
877  }
878 
879  f->avctx = avctx;
880  ff_init_range_decoder(c, buf, buf_size);
881  ff_build_rac_states(c, 0.05 * (1LL << 32), 256 - 8);
882 
883  p->pict_type = AV_PICTURE_TYPE_I; //FIXME I vs. P
884  if (get_rac(c, &keystate)) {
885  p->key_frame = 1;
886  f->key_frame_ok = 0;
887  if ((ret = read_header(f)) < 0)
888  return ret;
889  f->key_frame_ok = 1;
890  } else {
891  if (!f->key_frame_ok) {
892  av_log(avctx, AV_LOG_ERROR,
893  "Cannot decode non-keyframe without valid keyframe\n");
894  return AVERROR_INVALIDDATA;
895  }
896  p->key_frame = 0;
897  }
898 
899  if ((ret = ff_thread_get_buffer(avctx, &f->picture, AV_GET_BUFFER_FLAG_REF)) < 0)
900  return ret;
901 
902  if (avctx->debug & FF_DEBUG_PICT_INFO)
903  av_log(avctx, AV_LOG_DEBUG, "ver:%d keyframe:%d coder:%d ec:%d slices:%d bps:%d\n",
904  f->version, p->key_frame, f->ac, f->ec, f->slice_count, f->avctx->bits_per_raw_sample);
905 
906  ff_thread_finish_setup(avctx);
907 
908  buf_p = buf + buf_size;
909  for (i = f->slice_count - 1; i >= 0; i--) {
910  FFV1Context *fs = f->slice_context[i];
911  int trailer = 3 + 5*!!f->ec;
912  int v;
913 
914  if (i || f->version > 2) v = AV_RB24(buf_p-trailer) + trailer;
915  else v = buf_p - c->bytestream_start;
916  if (buf_p - c->bytestream_start < v) {
917  av_log(avctx, AV_LOG_ERROR, "Slice pointer chain broken\n");
918  return AVERROR_INVALIDDATA;
919  }
920  buf_p -= v;
921 
922  if (f->ec) {
923  unsigned crc = av_crc(av_crc_get_table(AV_CRC_32_IEEE), 0, buf_p, v);
924  if (crc) {
925  int64_t ts = avpkt->pts != AV_NOPTS_VALUE ? avpkt->pts : avpkt->dts;
926  av_log(f->avctx, AV_LOG_ERROR, "CRC mismatch %X!", crc);
927  if (ts != AV_NOPTS_VALUE && avctx->pkt_timebase.num) {
928  av_log(f->avctx, AV_LOG_ERROR, "at %f seconds\n", ts*av_q2d(avctx->pkt_timebase));
929  } else if (ts != AV_NOPTS_VALUE) {
930  av_log(f->avctx, AV_LOG_ERROR, "at %"PRId64"\n", ts);
931  } else {
932  av_log(f->avctx, AV_LOG_ERROR, "\n");
933  }
934  fs->slice_damaged = 1;
935  }
936  }
937 
938  if (i) {
939  ff_init_range_decoder(&fs->c, buf_p, v);
940  } else
941  fs->c.bytestream_end = (uint8_t *)(buf_p + v);
942 
943  fs->avctx = avctx;
944  fs->cur = p;
945  }
946 
947  avctx->execute(avctx,
948  decode_slice,
949  &f->slice_context[0],
950  NULL,
951  f->slice_count,
952  sizeof(void*));
953 
954  for (i = f->slice_count - 1; i >= 0; i--) {
955  FFV1Context *fs = f->slice_context[i];
956  int j;
957  if (fs->slice_damaged && f->last_picture.f->data[0]) {
958  const uint8_t *src[4];
959  uint8_t *dst[4];
960  ff_thread_await_progress(&f->last_picture, INT_MAX, 0);
961  for (j = 0; j < 4; j++) {
962  int sh = (j == 1 || j == 2) ? f->chroma_h_shift : 0;
963  int sv = (j == 1 || j == 2) ? f->chroma_v_shift : 0;
964  dst[j] = p->data[j] + p->linesize[j] *
965  (fs->slice_y >> sv) + (fs->slice_x >> sh);
966  src[j] = f->last_picture.f->data[j] + f->last_picture.f->linesize[j] *
967  (fs->slice_y >> sv) + (fs->slice_x >> sh);
968  }
969  av_image_copy(dst, p->linesize, (const uint8_t **)src,
970  f->last_picture.f->linesize,
971  avctx->pix_fmt,
972  fs->slice_width,
973  fs->slice_height);
974  }
975  }
976  ff_thread_report_progress(&f->picture, INT_MAX, 0);
977 
978  f->picture_number++;
979 
980  if (f->last_picture.f)
982  f->cur = NULL;
983  if ((ret = av_frame_ref(data, f->picture.f)) < 0)
984  return ret;
985 
986  *got_frame = 1;
987 
988  return buf_size;
989 }
990 
992 {
993  FFV1Context *f = avctx->priv_data;
994  int i, ret;
995 
996  f->picture.f = NULL;
997  f->last_picture.f = NULL;
998  f->sample_buffer = NULL;
999  f->slice_count = 0;
1000 
1001  for (i = 0; i < f->quant_table_count; i++) {
1002  av_assert0(f->version > 1);
1003  f->initial_states[i] = av_memdup(f->initial_states[i],
1004  f->context_count[i] * sizeof(*f->initial_states[i]));
1005  }
1006 
1007  f->picture.f = av_frame_alloc();
1008  f->last_picture.f = av_frame_alloc();
1009 
1010  if ((ret = ffv1_init_slice_contexts(f)) < 0)
1011  return ret;
1012 
1013  return 0;
1014 }
1015 
1016 static void copy_fields(FFV1Context *fsdst, FFV1Context *fssrc, FFV1Context *fsrc)
1017 {
1018  fsdst->version = fsrc->version;
1019  fsdst->micro_version = fsrc->micro_version;
1020  fsdst->chroma_planes = fsrc->chroma_planes;
1021  fsdst->chroma_h_shift = fsrc->chroma_h_shift;
1022  fsdst->chroma_v_shift = fsrc->chroma_v_shift;
1023  fsdst->transparency = fsrc->transparency;
1024  fsdst->plane_count = fsrc->plane_count;
1025  fsdst->ac = fsrc->ac;
1026  fsdst->colorspace = fsrc->colorspace;
1027 
1028  fsdst->ec = fsrc->ec;
1029  fsdst->intra = fsrc->intra;
1030  fsdst->slice_damaged = fssrc->slice_damaged;
1031  fsdst->key_frame_ok = fsrc->key_frame_ok;
1032 
1034  fsdst->packed_at_lsb = fsrc->packed_at_lsb;
1035  fsdst->slice_count = fsrc->slice_count;
1036  if (fsrc->version<3){
1037  fsdst->slice_x = fssrc->slice_x;
1038  fsdst->slice_y = fssrc->slice_y;
1039  fsdst->slice_width = fssrc->slice_width;
1040  fsdst->slice_height = fssrc->slice_height;
1041  }
1042 }
1043 
1045 {
1046  FFV1Context *fsrc = src->priv_data;
1047  FFV1Context *fdst = dst->priv_data;
1048  int i, ret;
1049 
1050  if (dst == src)
1051  return 0;
1052 
1053  {
1054  FFV1Context bak = *fdst;
1055  memcpy(fdst, fsrc, sizeof(*fdst));
1056  memcpy(fdst->initial_states, bak.initial_states, sizeof(fdst->initial_states));
1057  memcpy(fdst->slice_context, bak.slice_context , sizeof(fdst->slice_context));
1058  fdst->picture = bak.picture;
1059  fdst->last_picture = bak.last_picture;
1060  for (i = 0; i<fdst->num_h_slices * fdst->num_v_slices; i++) {
1061  FFV1Context *fssrc = fsrc->slice_context[i];
1062  FFV1Context *fsdst = fdst->slice_context[i];
1063  copy_fields(fsdst, fssrc, fsrc);
1064  }
1065  av_assert0(!fdst->plane[0].state);
1066  av_assert0(!fdst->sample_buffer);
1067  }
1068 
1069  av_assert1(fdst->slice_count == fsrc->slice_count);
1070 
1071 
1072  ff_thread_release_buffer(dst, &fdst->picture);
1073  if (fsrc->picture.f->data[0]) {
1074  if ((ret = ff_thread_ref_frame(&fdst->picture, &fsrc->picture)) < 0)
1075  return ret;
1076  }
1077 
1078  fdst->fsrc = fsrc;
1079 
1080  return 0;
1081 }
1082 
1084  .name = "ffv1",
1085  .long_name = NULL_IF_CONFIG_SMALL("FFmpeg video codec #1"),
1086  .type = AVMEDIA_TYPE_VIDEO,
1087  .id = AV_CODEC_ID_FFV1,
1088  .priv_data_size = sizeof(FFV1Context),
1089  .init = decode_init,
1090  .close = ffv1_close,
1091  .decode = decode_frame,
1093  .update_thread_context = ONLY_IF_THREADS_ENABLED(update_thread_context),
1094  .capabilities = CODEC_CAP_DR1 /*| CODEC_CAP_DRAW_HORIZ_BAND*/ |
1096 };