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vp3.c
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1 /*
2  * Copyright (C) 2003-2004 The FFmpeg project
3  *
4  * This file is part of FFmpeg.
5  *
6  * FFmpeg is free software; you can redistribute it and/or
7  * modify it under the terms of the GNU Lesser General Public
8  * License as published by the Free Software Foundation; either
9  * version 2.1 of the License, or (at your option) any later version.
10  *
11  * FFmpeg is distributed in the hope that it will be useful,
12  * but WITHOUT ANY WARRANTY; without even the implied warranty of
13  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
14  * Lesser General Public License for more details.
15  *
16  * You should have received a copy of the GNU Lesser General Public
17  * License along with FFmpeg; if not, write to the Free Software
18  * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA
19  */
20 
21 /**
22  * @file
23  * On2 VP3 Video Decoder
24  *
25  * VP3 Video Decoder by Mike Melanson (mike at multimedia.cx)
26  * For more information about the VP3 coding process, visit:
27  * http://wiki.multimedia.cx/index.php?title=On2_VP3
28  *
29  * Theora decoder by Alex Beregszaszi
30  */
31 
32 #include <stdio.h>
33 #include <stdlib.h>
34 #include <string.h>
35 
36 #include "libavutil/imgutils.h"
37 
38 #include "avcodec.h"
39 #include "get_bits.h"
40 #include "hpeldsp.h"
41 #include "internal.h"
42 #include "mathops.h"
43 #include "thread.h"
44 #include "videodsp.h"
45 #include "vp3data.h"
46 #include "vp3dsp.h"
47 #include "xiph.h"
48 
49 #define FRAGMENT_PIXELS 8
50 
51 // FIXME split things out into their own arrays
52 typedef struct Vp3Fragment {
53  int16_t dc;
54  uint8_t coding_method;
55  uint8_t qpi;
56 } Vp3Fragment;
57 
58 #define SB_NOT_CODED 0
59 #define SB_PARTIALLY_CODED 1
60 #define SB_FULLY_CODED 2
61 
62 // This is the maximum length of a single long bit run that can be encoded
63 // for superblock coding or block qps. Theora special-cases this to read a
64 // bit instead of flipping the current bit to allow for runs longer than 4129.
65 #define MAXIMUM_LONG_BIT_RUN 4129
66 
67 #define MODE_INTER_NO_MV 0
68 #define MODE_INTRA 1
69 #define MODE_INTER_PLUS_MV 2
70 #define MODE_INTER_LAST_MV 3
71 #define MODE_INTER_PRIOR_LAST 4
72 #define MODE_USING_GOLDEN 5
73 #define MODE_GOLDEN_MV 6
74 #define MODE_INTER_FOURMV 7
75 #define CODING_MODE_COUNT 8
76 
77 /* special internal mode */
78 #define MODE_COPY 8
79 
80 static int theora_decode_header(AVCodecContext *avctx, GetBitContext *gb);
81 static int theora_decode_tables(AVCodecContext *avctx, GetBitContext *gb);
82 
83 
84 /* There are 6 preset schemes, plus a free-form scheme */
85 static const int ModeAlphabet[6][CODING_MODE_COUNT] = {
86  /* scheme 1: Last motion vector dominates */
87  { MODE_INTER_LAST_MV, MODE_INTER_PRIOR_LAST,
88  MODE_INTER_PLUS_MV, MODE_INTER_NO_MV,
89  MODE_INTRA, MODE_USING_GOLDEN,
90  MODE_GOLDEN_MV, MODE_INTER_FOURMV },
91 
92  /* scheme 2 */
93  { MODE_INTER_LAST_MV, MODE_INTER_PRIOR_LAST,
94  MODE_INTER_NO_MV, MODE_INTER_PLUS_MV,
95  MODE_INTRA, MODE_USING_GOLDEN,
96  MODE_GOLDEN_MV, MODE_INTER_FOURMV },
97 
98  /* scheme 3 */
99  { MODE_INTER_LAST_MV, MODE_INTER_PLUS_MV,
100  MODE_INTER_PRIOR_LAST, MODE_INTER_NO_MV,
101  MODE_INTRA, MODE_USING_GOLDEN,
102  MODE_GOLDEN_MV, MODE_INTER_FOURMV },
103 
104  /* scheme 4 */
105  { MODE_INTER_LAST_MV, MODE_INTER_PLUS_MV,
106  MODE_INTER_NO_MV, MODE_INTER_PRIOR_LAST,
107  MODE_INTRA, MODE_USING_GOLDEN,
108  MODE_GOLDEN_MV, MODE_INTER_FOURMV },
109 
110  /* scheme 5: No motion vector dominates */
111  { MODE_INTER_NO_MV, MODE_INTER_LAST_MV,
112  MODE_INTER_PRIOR_LAST, MODE_INTER_PLUS_MV,
113  MODE_INTRA, MODE_USING_GOLDEN,
114  MODE_GOLDEN_MV, MODE_INTER_FOURMV },
115 
116  /* scheme 6 */
117  { MODE_INTER_NO_MV, MODE_USING_GOLDEN,
118  MODE_INTER_LAST_MV, MODE_INTER_PRIOR_LAST,
119  MODE_INTER_PLUS_MV, MODE_INTRA,
120  MODE_GOLDEN_MV, MODE_INTER_FOURMV },
121 };
122 
123 static const uint8_t hilbert_offset[16][2] = {
124  { 0, 0 }, { 1, 0 }, { 1, 1 }, { 0, 1 },
125  { 0, 2 }, { 0, 3 }, { 1, 3 }, { 1, 2 },
126  { 2, 2 }, { 2, 3 }, { 3, 3 }, { 3, 2 },
127  { 3, 1 }, { 2, 1 }, { 2, 0 }, { 3, 0 }
128 };
129 
130 #define MIN_DEQUANT_VAL 2
131 
132 typedef struct Vp3DecodeContext {
133  AVCodecContext *avctx;
134  int theora, theora_tables, theora_header;
135  int version;
136  int width, height;
137  int chroma_x_shift, chroma_y_shift;
138  ThreadFrame golden_frame;
139  ThreadFrame last_frame;
140  ThreadFrame current_frame;
141  int keyframe;
142  uint8_t idct_permutation[64];
143  uint8_t idct_scantable[64];
144  HpelDSPContext hdsp;
145  VideoDSPContext vdsp;
146  VP3DSPContext vp3dsp;
147  DECLARE_ALIGNED(16, int16_t, block)[64];
148  int flipped_image;
149  int last_slice_end;
150  int skip_loop_filter;
151 
152  int qps[3];
153  int nqps;
154  int last_qps[3];
155 
156  int superblock_count;
157  int y_superblock_width;
158  int y_superblock_height;
159  int y_superblock_count;
160  int c_superblock_width;
161  int c_superblock_height;
162  int c_superblock_count;
163  int u_superblock_start;
164  int v_superblock_start;
165  unsigned char *superblock_coding;
166 
167  int macroblock_count;
168  int macroblock_width;
169  int macroblock_height;
170 
171  int fragment_count;
172  int fragment_width[2];
173  int fragment_height[2];
174 
175  Vp3Fragment *all_fragments;
176  int fragment_start[3];
177  int data_offset[3];
178  uint8_t offset_x;
179  uint8_t offset_y;
180  int offset_x_warned;
181 
182  int8_t (*motion_val[2])[2];
183 
184  /* tables */
185  uint16_t coded_dc_scale_factor[64];
186  uint32_t coded_ac_scale_factor[64];
187  uint8_t base_matrix[384][64];
188  uint8_t qr_count[2][3];
189  uint8_t qr_size[2][3][64];
190  uint16_t qr_base[2][3][64];
191 
192  /**
193  * This is a list of all tokens in bitstream order. Reordering takes place
194  * by pulling from each level during IDCT. As a consequence, IDCT must be
195  * in Hilbert order, making the minimum slice height 64 for 4:2:0 and 32
196  * otherwise. The 32 different tokens with up to 12 bits of extradata are
197  * collapsed into 3 types, packed as follows:
198  * (from the low to high bits)
199  *
200  * 2 bits: type (0,1,2)
201  * 0: EOB run, 14 bits for run length (12 needed)
202  * 1: zero run, 7 bits for run length
203  * 7 bits for the next coefficient (3 needed)
204  * 2: coefficient, 14 bits (11 needed)
205  *
206  * Coefficients are signed, so are packed in the highest bits for automatic
207  * sign extension.
208  */
209  int16_t *dct_tokens[3][64];
210  int16_t *dct_tokens_base;
211 #define TOKEN_EOB(eob_run) ((eob_run) << 2)
212 #define TOKEN_ZERO_RUN(coeff, zero_run) (((coeff) * 512) + ((zero_run) << 2) + 1)
213 #define TOKEN_COEFF(coeff) (((coeff) * 4) + 2)
214 
215  /**
216  * number of blocks that contain DCT coefficients at
217  * the given level or higher
218  */
219  int num_coded_frags[3][64];
220  int total_num_coded_frags;
221 
222  /* this is a list of indexes into the all_fragments array indicating
223  * which of the fragments are coded */
224  int *coded_fragment_list[3];
225 
226  VLC dc_vlc[16];
227  VLC ac_vlc_1[16];
228  VLC ac_vlc_2[16];
229  VLC ac_vlc_3[16];
230  VLC ac_vlc_4[16];
231 
232  VLC superblock_run_length_vlc;
233  VLC fragment_run_length_vlc;
234  VLC mode_code_vlc;
235  VLC motion_vector_vlc;
236 
237  /* these arrays need to be on 16-byte boundaries since SSE2 operations
238  * index into them */
239  DECLARE_ALIGNED(16, int16_t, qmat)[3][2][3][64]; ///< qmat[qpi][is_inter][plane]
240 
241  /* This table contains superblock_count * 16 entries. Each set of 16
242  * numbers corresponds to the fragment indexes 0..15 of the superblock.
243  * An entry will be -1 to indicate that no entry corresponds to that
244  * index. */
245  int *superblock_fragments;
246 
247  /* This is an array that indicates how a particular macroblock
248  * is coded. */
249  unsigned char *macroblock_coding;
250 
251  uint8_t *edge_emu_buffer;
252 
253  /* Huffman decode */
254  int hti;
255  unsigned int hbits;
256  int entries;
257  int huff_code_size;
258  uint32_t huffman_table[80][32][2];
259 
260  uint8_t filter_limit_values[64];
261  DECLARE_ALIGNED(8, int, bounding_values_array)[256 + 2];
262 } Vp3DecodeContext;
263 
264 /************************************************************************
265  * VP3 specific functions
266  ************************************************************************/
267 
268 static av_cold void free_tables(AVCodecContext *avctx)
269 {
270  Vp3DecodeContext *s = avctx->priv_data;
271 
272  av_freep(&s->superblock_coding);
273  av_freep(&s->all_fragments);
274  av_freep(&s->coded_fragment_list[0]);
275  av_freep(&s->dct_tokens_base);
276  av_freep(&s->superblock_fragments);
277  av_freep(&s->macroblock_coding);
278  av_freep(&s->motion_val[0]);
279  av_freep(&s->motion_val[1]);
280 }
281 
282 static void vp3_decode_flush(AVCodecContext *avctx)
283 {
284  Vp3DecodeContext *s = avctx->priv_data;
285 
286  if (s->golden_frame.f)
287  ff_thread_release_buffer(avctx, &s->golden_frame);
288  if (s->last_frame.f)
289  ff_thread_release_buffer(avctx, &s->last_frame);
290  if (s->current_frame.f)
291  ff_thread_release_buffer(avctx, &s->current_frame);
292 }
293 
294 static av_cold int vp3_decode_end(AVCodecContext *avctx)
295 {
296  Vp3DecodeContext *s = avctx->priv_data;
297  int i;
298 
299  free_tables(avctx);
300  av_freep(&s->edge_emu_buffer);
301 
302  s->theora_tables = 0;
303 
304  /* release all frames */
305  vp3_decode_flush(avctx);
306  av_frame_free(&s->current_frame.f);
307  av_frame_free(&s->last_frame.f);
308  av_frame_free(&s->golden_frame.f);
309 
310  if (avctx->internal->is_copy)
311  return 0;
312 
313  for (i = 0; i < 16; i++) {
314  ff_free_vlc(&s->dc_vlc[i]);
315  ff_free_vlc(&s->ac_vlc_1[i]);
316  ff_free_vlc(&s->ac_vlc_2[i]);
317  ff_free_vlc(&s->ac_vlc_3[i]);
318  ff_free_vlc(&s->ac_vlc_4[i]);
319  }
320 
321  ff_free_vlc(&s->superblock_run_length_vlc);
322  ff_free_vlc(&s->fragment_run_length_vlc);
323  ff_free_vlc(&s->mode_code_vlc);
324  ff_free_vlc(&s->motion_vector_vlc);
325 
326  return 0;
327 }
328 
329 /**
330  * This function sets up all of the various blocks mappings:
331  * superblocks <-> fragments, macroblocks <-> fragments,
332  * superblocks <-> macroblocks
333  *
334  * @return 0 is successful; returns 1 if *anything* went wrong.
335  */
336 static int init_block_mapping(Vp3DecodeContext *s)
337 {
338  int sb_x, sb_y, plane;
339  int x, y, i, j = 0;
340 
341  for (plane = 0; plane < 3; plane++) {
342  int sb_width = plane ? s->c_superblock_width
343  : s->y_superblock_width;
344  int sb_height = plane ? s->c_superblock_height
345  : s->y_superblock_height;
346  int frag_width = s->fragment_width[!!plane];
347  int frag_height = s->fragment_height[!!plane];
348 
349  for (sb_y = 0; sb_y < sb_height; sb_y++)
350  for (sb_x = 0; sb_x < sb_width; sb_x++)
351  for (i = 0; i < 16; i++) {
352  x = 4 * sb_x + hilbert_offset[i][0];
353  y = 4 * sb_y + hilbert_offset[i][1];
354 
355  if (x < frag_width && y < frag_height)
356  s->superblock_fragments[j++] = s->fragment_start[plane] +
357  y * frag_width + x;
358  else
359  s->superblock_fragments[j++] = -1;
360  }
361  }
362 
363  return 0; /* successful path out */
364 }
365 
366 /*
367  * This function sets up the dequantization tables used for a particular
368  * frame.
369  */
370 static void init_dequantizer(Vp3DecodeContext *s, int qpi)
371 {
372  int ac_scale_factor = s->coded_ac_scale_factor[s->qps[qpi]];
373  int dc_scale_factor = s->coded_dc_scale_factor[s->qps[qpi]];
374  int i, plane, inter, qri, bmi, bmj, qistart;
375 
376  for (inter = 0; inter < 2; inter++) {
377  for (plane = 0; plane < 3; plane++) {
378  int sum = 0;
379  for (qri = 0; qri < s->qr_count[inter][plane]; qri++) {
380  sum += s->qr_size[inter][plane][qri];
381  if (s->qps[qpi] <= sum)
382  break;
383  }
384  qistart = sum - s->qr_size[inter][plane][qri];
385  bmi = s->qr_base[inter][plane][qri];
386  bmj = s->qr_base[inter][plane][qri + 1];
387  for (i = 0; i < 64; i++) {
388  int coeff = (2 * (sum - s->qps[qpi]) * s->base_matrix[bmi][i] -
389  2 * (qistart - s->qps[qpi]) * s->base_matrix[bmj][i] +
390  s->qr_size[inter][plane][qri]) /
391  (2 * s->qr_size[inter][plane][qri]);
392 
393  int qmin = 8 << (inter + !i);
394  int qscale = i ? ac_scale_factor : dc_scale_factor;
395 
396  s->qmat[qpi][inter][plane][s->idct_permutation[i]] =
397  av_clip((qscale * coeff) / 100 * 4, qmin, 4096);
398  }
399  /* all DC coefficients use the same quant so as not to interfere
400  * with DC prediction */
401  s->qmat[qpi][inter][plane][0] = s->qmat[0][inter][plane][0];
402  }
403  }
404 }
405 
406 /*
407  * This function initializes the loop filter boundary limits if the frame's
408  * quality index is different from the previous frame's.
409  *
410  * The filter_limit_values may not be larger than 127.
411  */
412 static void init_loop_filter(Vp3DecodeContext *s)
413 {
414  int *bounding_values = s->bounding_values_array + 127;
415  int filter_limit;
416  int x;
417  int value;
418 
419  filter_limit = s->filter_limit_values[s->qps[0]];
420  av_assert0(filter_limit < 128U);
421 
422  /* set up the bounding values */
423  memset(s->bounding_values_array, 0, 256 * sizeof(int));
424  for (x = 0; x < filter_limit; x++) {
425  bounding_values[-x] = -x;
426  bounding_values[x] = x;
427  }
428  for (x = value = filter_limit; x < 128 && value; x++, value--) {
429  bounding_values[ x] = value;
430  bounding_values[-x] = -value;
431  }
432  if (value)
433  bounding_values[128] = value;
434  bounding_values[129] = bounding_values[130] = filter_limit * 0x02020202;
435 }
436 
437 /*
438  * This function unpacks all of the superblock/macroblock/fragment coding
439  * information from the bitstream.
440  */
441 static int unpack_superblocks(Vp3DecodeContext *s, GetBitContext *gb)
442 {
443  int superblock_starts[3] = {
444  0, s->u_superblock_start, s->v_superblock_start
445  };
446  int bit = 0;
447  int current_superblock = 0;
448  int current_run = 0;
449  int num_partial_superblocks = 0;
450 
451  int i, j;
452  int current_fragment;
453  int plane;
454 
455  if (s->keyframe) {
456  memset(s->superblock_coding, SB_FULLY_CODED, s->superblock_count);
457  } else {
458  /* unpack the list of partially-coded superblocks */
459  bit = get_bits1(gb) ^ 1;
460  current_run = 0;
461 
462  while (current_superblock < s->superblock_count && get_bits_left(gb) > 0) {
463  if (s->theora && current_run == MAXIMUM_LONG_BIT_RUN)
464  bit = get_bits1(gb);
465  else
466  bit ^= 1;
467 
468  current_run = get_vlc2(gb, s->superblock_run_length_vlc.table,
469  6, 2) + 1;
470  if (current_run == 34)
471  current_run += get_bits(gb, 12);
472 
473  if (current_run > s->superblock_count - current_superblock) {
474  av_log(s->avctx, AV_LOG_ERROR,
475  "Invalid partially coded superblock run length\n");
476  return -1;
477  }
478 
479  memset(s->superblock_coding + current_superblock, bit, current_run);
480 
481  current_superblock += current_run;
482  if (bit)
483  num_partial_superblocks += current_run;
484  }
485 
486  /* unpack the list of fully coded superblocks if any of the blocks were
487  * not marked as partially coded in the previous step */
488  if (num_partial_superblocks < s->superblock_count) {
489  int superblocks_decoded = 0;
490 
491  current_superblock = 0;
492  bit = get_bits1(gb) ^ 1;
493  current_run = 0;
494 
495  while (superblocks_decoded < s->superblock_count - num_partial_superblocks &&
496  get_bits_left(gb) > 0) {
497  if (s->theora && current_run == MAXIMUM_LONG_BIT_RUN)
498  bit = get_bits1(gb);
499  else
500  bit ^= 1;
501 
502  current_run = get_vlc2(gb, s->superblock_run_length_vlc.table,
503  6, 2) + 1;
504  if (current_run == 34)
505  current_run += get_bits(gb, 12);
506 
507  for (j = 0; j < current_run; current_superblock++) {
508  if (current_superblock >= s->superblock_count) {
509  av_log(s->avctx, AV_LOG_ERROR,
510  "Invalid fully coded superblock run length\n");
511  return -1;
512  }
513 
514  /* skip any superblocks already marked as partially coded */
515  if (s->superblock_coding[current_superblock] == SB_NOT_CODED) {
516  s->superblock_coding[current_superblock] = 2 * bit;
517  j++;
518  }
519  }
520  superblocks_decoded += current_run;
521  }
522  }
523 
524  /* if there were partial blocks, initialize bitstream for
525  * unpacking fragment codings */
526  if (num_partial_superblocks) {
527  current_run = 0;
528  bit = get_bits1(gb);
529  /* toggle the bit because as soon as the first run length is
530  * fetched the bit will be toggled again */
531  bit ^= 1;
532  }
533  }
534 
535  /* figure out which fragments are coded; iterate through each
536  * superblock (all planes) */
537  s->total_num_coded_frags = 0;
538  memset(s->macroblock_coding, MODE_COPY, s->macroblock_count);
539 
540  for (plane = 0; plane < 3; plane++) {
541  int sb_start = superblock_starts[plane];
542  int sb_end = sb_start + (plane ? s->c_superblock_count
543  : s->y_superblock_count);
544  int num_coded_frags = 0;
545 
546  for (i = sb_start; i < sb_end && get_bits_left(gb) > 0; i++) {
547  /* iterate through all 16 fragments in a superblock */
548  for (j = 0; j < 16; j++) {
549  /* if the fragment is in bounds, check its coding status */
550  current_fragment = s->superblock_fragments[i * 16 + j];
551  if (current_fragment != -1) {
552  int coded = s->superblock_coding[i];
553 
554  if (s->superblock_coding[i] == SB_PARTIALLY_CODED) {
555  /* fragment may or may not be coded; this is the case
556  * that cares about the fragment coding runs */
557  if (current_run-- == 0) {
558  bit ^= 1;
559  current_run = get_vlc2(gb, s->fragment_run_length_vlc.table, 5, 2);
560  }
561  coded = bit;
562  }
563 
564  if (coded) {
565  /* default mode; actual mode will be decoded in
566  * the next phase */
567  s->all_fragments[current_fragment].coding_method =
568  MODE_INTER_NO_MV;
569  s->coded_fragment_list[plane][num_coded_frags++] =
570  current_fragment;
571  } else {
572  /* not coded; copy this fragment from the prior frame */
573  s->all_fragments[current_fragment].coding_method =
574  MODE_COPY;
575  }
576  }
577  }
578  }
579  s->total_num_coded_frags += num_coded_frags;
580  for (i = 0; i < 64; i++)
581  s->num_coded_frags[plane][i] = num_coded_frags;
582  if (plane < 2)
583  s->coded_fragment_list[plane + 1] = s->coded_fragment_list[plane] +
584  num_coded_frags;
585  }
586  return 0;
587 }
588 
589 /*
590  * This function unpacks all the coding mode data for individual macroblocks
591  * from the bitstream.
592  */
593 static int unpack_modes(Vp3DecodeContext *s, GetBitContext *gb)
594 {
595  int i, j, k, sb_x, sb_y;
596  int scheme;
597  int current_macroblock;
598  int current_fragment;
599  int coding_mode;
600  int custom_mode_alphabet[CODING_MODE_COUNT];
601  const int *alphabet;
602  Vp3Fragment *frag;
603 
604  if (s->keyframe) {
605  for (i = 0; i < s->fragment_count; i++)
606  s->all_fragments[i].coding_method = MODE_INTRA;
607  } else {
608  /* fetch the mode coding scheme for this frame */
609  scheme = get_bits(gb, 3);
610 
611  /* is it a custom coding scheme? */
612  if (scheme == 0) {
613  for (i = 0; i < 8; i++)
614  custom_mode_alphabet[i] = MODE_INTER_NO_MV;
615  for (i = 0; i < 8; i++)
616  custom_mode_alphabet[get_bits(gb, 3)] = i;
617  alphabet = custom_mode_alphabet;
618  } else
619  alphabet = ModeAlphabet[scheme - 1];
620 
621  /* iterate through all of the macroblocks that contain 1 or more
622  * coded fragments */
623  for (sb_y = 0; sb_y < s->y_superblock_height; sb_y++) {
624  for (sb_x = 0; sb_x < s->y_superblock_width; sb_x++) {
625  if (get_bits_left(gb) <= 0)
626  return -1;
627 
628  for (j = 0; j < 4; j++) {
629  int mb_x = 2 * sb_x + (j >> 1);
630  int mb_y = 2 * sb_y + (((j >> 1) + j) & 1);
631  current_macroblock = mb_y * s->macroblock_width + mb_x;
632 
633  if (mb_x >= s->macroblock_width ||
634  mb_y >= s->macroblock_height)
635  continue;
636 
637 #define BLOCK_X (2 * mb_x + (k & 1))
638 #define BLOCK_Y (2 * mb_y + (k >> 1))
639  /* coding modes are only stored if the macroblock has
640  * at least one luma block coded, otherwise it must be
641  * INTER_NO_MV */
642  for (k = 0; k < 4; k++) {
643  current_fragment = BLOCK_Y *
644  s->fragment_width[0] + BLOCK_X;
645  if (s->all_fragments[current_fragment].coding_method != MODE_COPY)
646  break;
647  }
648  if (k == 4) {
649  s->macroblock_coding[current_macroblock] = MODE_INTER_NO_MV;
650  continue;
651  }
652 
653  /* mode 7 means get 3 bits for each coding mode */
654  if (scheme == 7)
655  coding_mode = get_bits(gb, 3);
656  else
657  coding_mode = alphabet[get_vlc2(gb, s->mode_code_vlc.table, 3, 3)];
658 
659  s->macroblock_coding[current_macroblock] = coding_mode;
660  for (k = 0; k < 4; k++) {
661  frag = s->all_fragments + BLOCK_Y * s->fragment_width[0] + BLOCK_X;
662  if (frag->coding_method != MODE_COPY)
663  frag->coding_method = coding_mode;
664  }
665 
666 #define SET_CHROMA_MODES \
667  if (frag[s->fragment_start[1]].coding_method != MODE_COPY) \
668  frag[s->fragment_start[1]].coding_method = coding_mode; \
669  if (frag[s->fragment_start[2]].coding_method != MODE_COPY) \
670  frag[s->fragment_start[2]].coding_method = coding_mode;
671 
672  if (s->chroma_y_shift) {
673  frag = s->all_fragments + mb_y *
674  s->fragment_width[1] + mb_x;
675  SET_CHROMA_MODES
676  } else if (s->chroma_x_shift) {
677  frag = s->all_fragments +
678  2 * mb_y * s->fragment_width[1] + mb_x;
679  for (k = 0; k < 2; k++) {
680  SET_CHROMA_MODES
681  frag += s->fragment_width[1];
682  }
683  } else {
684  for (k = 0; k < 4; k++) {
685  frag = s->all_fragments +
686  BLOCK_Y * s->fragment_width[1] + BLOCK_X;
687  SET_CHROMA_MODES
688  }
689  }
690  }
691  }
692  }
693  }
694 
695  return 0;
696 }
697 
698 /*
699  * This function unpacks all the motion vectors for the individual
700  * macroblocks from the bitstream.
701  */
702 static int unpack_vectors(Vp3DecodeContext *s, GetBitContext *gb)
703 {
704  int j, k, sb_x, sb_y;
705  int coding_mode;
706  int motion_x[4];
707  int motion_y[4];
708  int last_motion_x = 0;
709  int last_motion_y = 0;
710  int prior_last_motion_x = 0;
711  int prior_last_motion_y = 0;
712  int current_macroblock;
713  int current_fragment;
714  int frag;
715 
716  if (s->keyframe)
717  return 0;
718 
719  /* coding mode 0 is the VLC scheme; 1 is the fixed code scheme */
720  coding_mode = get_bits1(gb);
721 
722  /* iterate through all of the macroblocks that contain 1 or more
723  * coded fragments */
724  for (sb_y = 0; sb_y < s->y_superblock_height; sb_y++) {
725  for (sb_x = 0; sb_x < s->y_superblock_width; sb_x++) {
726  if (get_bits_left(gb) <= 0)
727  return -1;
728 
729  for (j = 0; j < 4; j++) {
730  int mb_x = 2 * sb_x + (j >> 1);
731  int mb_y = 2 * sb_y + (((j >> 1) + j) & 1);
732  current_macroblock = mb_y * s->macroblock_width + mb_x;
733 
734  if (mb_x >= s->macroblock_width ||
735  mb_y >= s->macroblock_height ||
736  s->macroblock_coding[current_macroblock] == MODE_COPY)
737  continue;
738 
739  switch (s->macroblock_coding[current_macroblock]) {
740  case MODE_INTER_PLUS_MV:
741  case MODE_GOLDEN_MV:
742  /* all 6 fragments use the same motion vector */
743  if (coding_mode == 0) {
744  motion_x[0] = motion_vector_table[get_vlc2(gb, s->motion_vector_vlc.table, 6, 2)];
745  motion_y[0] = motion_vector_table[get_vlc2(gb, s->motion_vector_vlc.table, 6, 2)];
746  } else {
747  motion_x[0] = fixed_motion_vector_table[get_bits(gb, 6)];
748  motion_y[0] = fixed_motion_vector_table[get_bits(gb, 6)];
749  }
750 
751  /* vector maintenance, only on MODE_INTER_PLUS_MV */
752  if (s->macroblock_coding[current_macroblock] == MODE_INTER_PLUS_MV) {
753  prior_last_motion_x = last_motion_x;
754  prior_last_motion_y = last_motion_y;
755  last_motion_x = motion_x[0];
756  last_motion_y = motion_y[0];
757  }
758  break;
759 
760  case MODE_INTER_FOURMV:
761  /* vector maintenance */
762  prior_last_motion_x = last_motion_x;
763  prior_last_motion_y = last_motion_y;
764 
765  /* fetch 4 vectors from the bitstream, one for each
766  * Y fragment, then average for the C fragment vectors */
767  for (k = 0; k < 4; k++) {
768  current_fragment = BLOCK_Y * s->fragment_width[0] + BLOCK_X;
769  if (s->all_fragments[current_fragment].coding_method != MODE_COPY) {
770  if (coding_mode == 0) {
771  motion_x[k] = motion_vector_table[get_vlc2(gb, s->motion_vector_vlc.table, 6, 2)];
772  motion_y[k] = motion_vector_table[get_vlc2(gb, s->motion_vector_vlc.table, 6, 2)];
773  } else {
774  motion_x[k] = fixed_motion_vector_table[get_bits(gb, 6)];
775  motion_y[k] = fixed_motion_vector_table[get_bits(gb, 6)];
776  }
777  last_motion_x = motion_x[k];
778  last_motion_y = motion_y[k];
779  } else {
780  motion_x[k] = 0;
781  motion_y[k] = 0;
782  }
783  }
784  break;
785 
786  case MODE_INTER_LAST_MV:
787  /* all 6 fragments use the last motion vector */
788  motion_x[0] = last_motion_x;
789  motion_y[0] = last_motion_y;
790 
791  /* no vector maintenance (last vector remains the
792  * last vector) */
793  break;
794 
795  case MODE_INTER_PRIOR_LAST:
796  /* all 6 fragments use the motion vector prior to the
797  * last motion vector */
798  motion_x[0] = prior_last_motion_x;
799  motion_y[0] = prior_last_motion_y;
800 
801  /* vector maintenance */
802  prior_last_motion_x = last_motion_x;
803  prior_last_motion_y = last_motion_y;
804  last_motion_x = motion_x[0];
805  last_motion_y = motion_y[0];
806  break;
807 
808  default:
809  /* covers intra, inter without MV, golden without MV */
810  motion_x[0] = 0;
811  motion_y[0] = 0;
812 
813  /* no vector maintenance */
814  break;
815  }
816 
817  /* assign the motion vectors to the correct fragments */
818  for (k = 0; k < 4; k++) {
819  current_fragment =
820  BLOCK_Y * s->fragment_width[0] + BLOCK_X;
821  if (s->macroblock_coding[current_macroblock] == MODE_INTER_FOURMV) {
822  s->motion_val[0][current_fragment][0] = motion_x[k];
823  s->motion_val[0][current_fragment][1] = motion_y[k];
824  } else {
825  s->motion_val[0][current_fragment][0] = motion_x[0];
826  s->motion_val[0][current_fragment][1] = motion_y[0];
827  }
828  }
829 
830  if (s->chroma_y_shift) {
831  if (s->macroblock_coding[current_macroblock] == MODE_INTER_FOURMV) {
832  motion_x[0] = RSHIFT(motion_x[0] + motion_x[1] +
833  motion_x[2] + motion_x[3], 2);
834  motion_y[0] = RSHIFT(motion_y[0] + motion_y[1] +
835  motion_y[2] + motion_y[3], 2);
836  }
837  motion_x[0] = (motion_x[0] >> 1) | (motion_x[0] & 1);
838  motion_y[0] = (motion_y[0] >> 1) | (motion_y[0] & 1);
839  frag = mb_y * s->fragment_width[1] + mb_x;
840  s->motion_val[1][frag][0] = motion_x[0];
841  s->motion_val[1][frag][1] = motion_y[0];
842  } else if (s->chroma_x_shift) {
843  if (s->macroblock_coding[current_macroblock] == MODE_INTER_FOURMV) {
844  motion_x[0] = RSHIFT(motion_x[0] + motion_x[1], 1);
845  motion_y[0] = RSHIFT(motion_y[0] + motion_y[1], 1);
846  motion_x[1] = RSHIFT(motion_x[2] + motion_x[3], 1);
847  motion_y[1] = RSHIFT(motion_y[2] + motion_y[3], 1);
848  } else {
849  motion_x[1] = motion_x[0];
850  motion_y[1] = motion_y[0];
851  }
852  motion_x[0] = (motion_x[0] >> 1) | (motion_x[0] & 1);
853  motion_x[1] = (motion_x[1] >> 1) | (motion_x[1] & 1);
854 
855  frag = 2 * mb_y * s->fragment_width[1] + mb_x;
856  for (k = 0; k < 2; k++) {
857  s->motion_val[1][frag][0] = motion_x[k];
858  s->motion_val[1][frag][1] = motion_y[k];
859  frag += s->fragment_width[1];
860  }
861  } else {
862  for (k = 0; k < 4; k++) {
863  frag = BLOCK_Y * s->fragment_width[1] + BLOCK_X;
864  if (s->macroblock_coding[current_macroblock] == MODE_INTER_FOURMV) {
865  s->motion_val[1][frag][0] = motion_x[k];
866  s->motion_val[1][frag][1] = motion_y[k];
867  } else {
868  s->motion_val[1][frag][0] = motion_x[0];
869  s->motion_val[1][frag][1] = motion_y[0];
870  }
871  }
872  }
873  }
874  }
875  }
876 
877  return 0;
878 }
879 
880 static int unpack_block_qpis(Vp3DecodeContext *s, GetBitContext *gb)
881 {
882  int qpi, i, j, bit, run_length, blocks_decoded, num_blocks_at_qpi;
883  int num_blocks = s->total_num_coded_frags;
884 
885  for (qpi = 0; qpi < s->nqps - 1 && num_blocks > 0; qpi++) {
886  i = blocks_decoded = num_blocks_at_qpi = 0;
887 
888  bit = get_bits1(gb) ^ 1;
889  run_length = 0;
890 
891  do {
892  if (run_length == MAXIMUM_LONG_BIT_RUN)
893  bit = get_bits1(gb);
894  else
895  bit ^= 1;
896 
897  run_length = get_vlc2(gb, s->superblock_run_length_vlc.table, 6, 2) + 1;
898  if (run_length == 34)
899  run_length += get_bits(gb, 12);
900  blocks_decoded += run_length;
901 
902  if (!bit)
903  num_blocks_at_qpi += run_length;
904 
905  for (j = 0; j < run_length; i++) {
906  if (i >= s->total_num_coded_frags)
907  return -1;
908 
909  if (s->all_fragments[s->coded_fragment_list[0][i]].qpi == qpi) {
910  s->all_fragments[s->coded_fragment_list[0][i]].qpi += bit;
911  j++;
912  }
913  }
914  } while (blocks_decoded < num_blocks && get_bits_left(gb) > 0);
915 
916  num_blocks -= num_blocks_at_qpi;
917  }
918 
919  return 0;
920 }
921 
922 /*
923  * This function is called by unpack_dct_coeffs() to extract the VLCs from
924  * the bitstream. The VLCs encode tokens which are used to unpack DCT
925  * data. This function unpacks all the VLCs for either the Y plane or both
926  * C planes, and is called for DC coefficients or different AC coefficient
927  * levels (since different coefficient types require different VLC tables.
928  *
929  * This function returns a residual eob run. E.g, if a particular token gave
930  * instructions to EOB the next 5 fragments and there were only 2 fragments
931  * left in the current fragment range, 3 would be returned so that it could
932  * be passed into the next call to this same function.
933  */
934 static int unpack_vlcs(Vp3DecodeContext *s, GetBitContext *gb,
935  VLC *table, int coeff_index,
936  int plane,
937  int eob_run)
938 {
939  int i, j = 0;
940  int token;
941  int zero_run = 0;
942  int16_t coeff = 0;
943  int bits_to_get;
944  int blocks_ended;
945  int coeff_i = 0;
946  int num_coeffs = s->num_coded_frags[plane][coeff_index];
947  int16_t *dct_tokens = s->dct_tokens[plane][coeff_index];
948 
949  /* local references to structure members to avoid repeated dereferences */
950  int *coded_fragment_list = s->coded_fragment_list[plane];
951  Vp3Fragment *all_fragments = s->all_fragments;
952  VLC_TYPE(*vlc_table)[2] = table->table;
953 
954  if (num_coeffs < 0)
955  av_log(s->avctx, AV_LOG_ERROR,
956  "Invalid number of coefficients at level %d\n", coeff_index);
957 
958  if (eob_run > num_coeffs) {
959  coeff_i =
960  blocks_ended = num_coeffs;
961  eob_run -= num_coeffs;
962  } else {
963  coeff_i =
964  blocks_ended = eob_run;
965  eob_run = 0;
966  }
967 
968  // insert fake EOB token to cover the split between planes or zzi
969  if (blocks_ended)
970  dct_tokens[j++] = blocks_ended << 2;
971 
972  while (coeff_i < num_coeffs && get_bits_left(gb) > 0) {
973  /* decode a VLC into a token */
974  token = get_vlc2(gb, vlc_table, 11, 3);
975  /* use the token to get a zero run, a coefficient, and an eob run */
976  if ((unsigned) token <= 6U) {
977  eob_run = eob_run_base[token];
978  if (eob_run_get_bits[token])
979  eob_run += get_bits(gb, eob_run_get_bits[token]);
980 
981  // record only the number of blocks ended in this plane,
982  // any spill will be recorded in the next plane.
983  if (eob_run > num_coeffs - coeff_i) {
984  dct_tokens[j++] = TOKEN_EOB(num_coeffs - coeff_i);
985  blocks_ended += num_coeffs - coeff_i;
986  eob_run -= num_coeffs - coeff_i;
987  coeff_i = num_coeffs;
988  } else {
989  dct_tokens[j++] = TOKEN_EOB(eob_run);
990  blocks_ended += eob_run;
991  coeff_i += eob_run;
992  eob_run = 0;
993  }
994  } else if (token >= 0) {
995  bits_to_get = coeff_get_bits[token];
996  if (bits_to_get)
997  bits_to_get = get_bits(gb, bits_to_get);
998  coeff = coeff_tables[token][bits_to_get];
999 
1000  zero_run = zero_run_base[token];
1001  if (zero_run_get_bits[token])
1002  zero_run += get_bits(gb, zero_run_get_bits[token]);
1003 
1004  if (zero_run) {
1005  dct_tokens[j++] = TOKEN_ZERO_RUN(coeff, zero_run);
1006  } else {
1007  // Save DC into the fragment structure. DC prediction is
1008  // done in raster order, so the actual DC can't be in with
1009  // other tokens. We still need the token in dct_tokens[]
1010  // however, or else the structure collapses on itself.
1011  if (!coeff_index)
1012  all_fragments[coded_fragment_list[coeff_i]].dc = coeff;
1013 
1014  dct_tokens[j++] = TOKEN_COEFF(coeff);
1015  }
1016 
1017  if (coeff_index + zero_run > 64) {
1018  av_log(s->avctx, AV_LOG_DEBUG,
1019  "Invalid zero run of %d with %d coeffs left\n",
1020  zero_run, 64 - coeff_index);
1021  zero_run = 64 - coeff_index;
1022  }
1023 
1024  // zero runs code multiple coefficients,
1025  // so don't try to decode coeffs for those higher levels
1026  for (i = coeff_index + 1; i <= coeff_index + zero_run; i++)
1027  s->num_coded_frags[plane][i]--;
1028  coeff_i++;
1029  } else {
1030  av_log(s->avctx, AV_LOG_ERROR, "Invalid token %d\n", token);
1031  return -1;
1032  }
1033  }
1034 
1035  if (blocks_ended > s->num_coded_frags[plane][coeff_index])
1036  av_log(s->avctx, AV_LOG_ERROR, "More blocks ended than coded!\n");
1037 
1038  // decrement the number of blocks that have higher coefficients for each
1039  // EOB run at this level
1040  if (blocks_ended)
1041  for (i = coeff_index + 1; i < 64; i++)
1042  s->num_coded_frags[plane][i] -= blocks_ended;
1043 
1044  // setup the next buffer
1045  if (plane < 2)
1046  s->dct_tokens[plane + 1][coeff_index] = dct_tokens + j;
1047  else if (coeff_index < 63)
1048  s->dct_tokens[0][coeff_index + 1] = dct_tokens + j;
1049 
1050  return eob_run;
1051 }
1052 
1053 static void reverse_dc_prediction(Vp3DecodeContext *s,
1054  int first_fragment,
1055  int fragment_width,
1056  int fragment_height);
1057 /*
1058  * This function unpacks all of the DCT coefficient data from the
1059  * bitstream.
1060  */
1061 static int unpack_dct_coeffs(Vp3DecodeContext *s, GetBitContext *gb)
1062 {
1063  int i;
1064  int dc_y_table;
1065  int dc_c_table;
1066  int ac_y_table;
1067  int ac_c_table;
1068  int residual_eob_run = 0;
1069  VLC *y_tables[64];
1070  VLC *c_tables[64];
1071 
1072  s->dct_tokens[0][0] = s->dct_tokens_base;
1073 
1074  /* fetch the DC table indexes */
1075  dc_y_table = get_bits(gb, 4);
1076  dc_c_table = get_bits(gb, 4);
1077 
1078  /* unpack the Y plane DC coefficients */
1079  residual_eob_run = unpack_vlcs(s, gb, &s->dc_vlc[dc_y_table], 0,
1080  0, residual_eob_run);
1081  if (residual_eob_run < 0)
1082  return residual_eob_run;
1083 
1084  /* reverse prediction of the Y-plane DC coefficients */
1085  reverse_dc_prediction(s, 0, s->fragment_width[0], s->fragment_height[0]);
1086 
1087  /* unpack the C plane DC coefficients */
1088  residual_eob_run = unpack_vlcs(s, gb, &s->dc_vlc[dc_c_table], 0,
1089  1, residual_eob_run);
1090  if (residual_eob_run < 0)
1091  return residual_eob_run;
1092  residual_eob_run = unpack_vlcs(s, gb, &s->dc_vlc[dc_c_table], 0,
1093  2, residual_eob_run);
1094  if (residual_eob_run < 0)
1095  return residual_eob_run;
1096 
1097  /* reverse prediction of the C-plane DC coefficients */
1098  if (!(s->avctx->flags & AV_CODEC_FLAG_GRAY)) {
1099  reverse_dc_prediction(s, s->fragment_start[1],
1100  s->fragment_width[1], s->fragment_height[1]);
1101  reverse_dc_prediction(s, s->fragment_start[2],
1102  s->fragment_width[1], s->fragment_height[1]);
1103  }
1104 
1105  /* fetch the AC table indexes */
1106  ac_y_table = get_bits(gb, 4);
1107  ac_c_table = get_bits(gb, 4);
1108 
1109  /* build tables of AC VLC tables */
1110  for (i = 1; i <= 5; i++) {
1111  y_tables[i] = &s->ac_vlc_1[ac_y_table];
1112  c_tables[i] = &s->ac_vlc_1[ac_c_table];
1113  }
1114  for (i = 6; i <= 14; i++) {
1115  y_tables[i] = &s->ac_vlc_2[ac_y_table];
1116  c_tables[i] = &s->ac_vlc_2[ac_c_table];
1117  }
1118  for (i = 15; i <= 27; i++) {
1119  y_tables[i] = &s->ac_vlc_3[ac_y_table];
1120  c_tables[i] = &s->ac_vlc_3[ac_c_table];
1121  }
1122  for (i = 28; i <= 63; i++) {
1123  y_tables[i] = &s->ac_vlc_4[ac_y_table];
1124  c_tables[i] = &s->ac_vlc_4[ac_c_table];
1125  }
1126 
1127  /* decode all AC coefficients */
1128  for (i = 1; i <= 63; i++) {
1129  residual_eob_run = unpack_vlcs(s, gb, y_tables[i], i,
1130  0, residual_eob_run);
1131  if (residual_eob_run < 0)
1132  return residual_eob_run;
1133 
1134  residual_eob_run = unpack_vlcs(s, gb, c_tables[i], i,
1135  1, residual_eob_run);
1136  if (residual_eob_run < 0)
1137  return residual_eob_run;
1138  residual_eob_run = unpack_vlcs(s, gb, c_tables[i], i,
1139  2, residual_eob_run);
1140  if (residual_eob_run < 0)
1141  return residual_eob_run;
1142  }
1143 
1144  return 0;
1145 }
1146 
1147 /*
1148  * This function reverses the DC prediction for each coded fragment in
1149  * the frame. Much of this function is adapted directly from the original
1150  * VP3 source code.
1151  */
1152 #define COMPATIBLE_FRAME(x) \
1153  (compatible_frame[s->all_fragments[x].coding_method] == current_frame_type)
1154 #define DC_COEFF(u) s->all_fragments[u].dc
1155 
1156 static void reverse_dc_prediction(Vp3DecodeContext *s,
1157  int first_fragment,
1158  int fragment_width,
1159  int fragment_height)
1160 {
1161 #define PUL 8
1162 #define PU 4
1163 #define PUR 2
1164 #define PL 1
1165 
1166  int x, y;
1167  int i = first_fragment;
1168 
1169  int predicted_dc;
1170 
1171  /* DC values for the left, up-left, up, and up-right fragments */
1172  int vl, vul, vu, vur;
1173 
1174  /* indexes for the left, up-left, up, and up-right fragments */
1175  int l, ul, u, ur;
1176 
1177  /*
1178  * The 6 fields mean:
1179  * 0: up-left multiplier
1180  * 1: up multiplier
1181  * 2: up-right multiplier
1182  * 3: left multiplier
1183  */
1184  static const int predictor_transform[16][4] = {
1185  { 0, 0, 0, 0 },
1186  { 0, 0, 0, 128 }, // PL
1187  { 0, 0, 128, 0 }, // PUR
1188  { 0, 0, 53, 75 }, // PUR|PL
1189  { 0, 128, 0, 0 }, // PU
1190  { 0, 64, 0, 64 }, // PU |PL
1191  { 0, 128, 0, 0 }, // PU |PUR
1192  { 0, 0, 53, 75 }, // PU |PUR|PL
1193  { 128, 0, 0, 0 }, // PUL
1194  { 0, 0, 0, 128 }, // PUL|PL
1195  { 64, 0, 64, 0 }, // PUL|PUR
1196  { 0, 0, 53, 75 }, // PUL|PUR|PL
1197  { 0, 128, 0, 0 }, // PUL|PU
1198  { -104, 116, 0, 116 }, // PUL|PU |PL
1199  { 24, 80, 24, 0 }, // PUL|PU |PUR
1200  { -104, 116, 0, 116 } // PUL|PU |PUR|PL
1201  };
1202 
1203  /* This table shows which types of blocks can use other blocks for
1204  * prediction. For example, INTRA is the only mode in this table to
1205  * have a frame number of 0. That means INTRA blocks can only predict
1206  * from other INTRA blocks. There are 2 golden frame coding types;
1207  * blocks encoding in these modes can only predict from other blocks
1208  * that were encoded with these 1 of these 2 modes. */
1209  static const unsigned char compatible_frame[9] = {
1210  1, /* MODE_INTER_NO_MV */
1211  0, /* MODE_INTRA */
1212  1, /* MODE_INTER_PLUS_MV */
1213  1, /* MODE_INTER_LAST_MV */
1214  1, /* MODE_INTER_PRIOR_MV */
1215  2, /* MODE_USING_GOLDEN */
1216  2, /* MODE_GOLDEN_MV */
1217  1, /* MODE_INTER_FOUR_MV */
1218  3 /* MODE_COPY */
1219  };
1220  int current_frame_type;
1221 
1222  /* there is a last DC predictor for each of the 3 frame types */
1223  short last_dc[3];
1224 
1225  int transform = 0;
1226 
1227  vul =
1228  vu =
1229  vur =
1230  vl = 0;
1231  last_dc[0] =
1232  last_dc[1] =
1233  last_dc[2] = 0;
1234 
1235  /* for each fragment row... */
1236  for (y = 0; y < fragment_height; y++) {
1237  /* for each fragment in a row... */
1238  for (x = 0; x < fragment_width; x++, i++) {
1239 
1240  /* reverse prediction if this block was coded */
1241  if (s->all_fragments[i].coding_method != MODE_COPY) {
1242  current_frame_type =
1243  compatible_frame[s->all_fragments[i].coding_method];
1244 
1245  transform = 0;
1246  if (x) {
1247  l = i - 1;
1248  vl = DC_COEFF(l);
1249  if (COMPATIBLE_FRAME(l))
1250  transform |= PL;
1251  }
1252  if (y) {
1253  u = i - fragment_width;
1254  vu = DC_COEFF(u);
1255  if (COMPATIBLE_FRAME(u))
1256  transform |= PU;
1257  if (x) {
1258  ul = i - fragment_width - 1;
1259  vul = DC_COEFF(ul);
1260  if (COMPATIBLE_FRAME(ul))
1261  transform |= PUL;
1262  }
1263  if (x + 1 < fragment_width) {
1264  ur = i - fragment_width + 1;
1265  vur = DC_COEFF(ur);
1266  if (COMPATIBLE_FRAME(ur))
1267  transform |= PUR;
1268  }
1269  }
1270 
1271  if (transform == 0) {
1272  /* if there were no fragments to predict from, use last
1273  * DC saved */
1274  predicted_dc = last_dc[current_frame_type];
1275  } else {
1276  /* apply the appropriate predictor transform */
1277  predicted_dc =
1278  (predictor_transform[transform][0] * vul) +
1279  (predictor_transform[transform][1] * vu) +
1280  (predictor_transform[transform][2] * vur) +
1281  (predictor_transform[transform][3] * vl);
1282 
1283  predicted_dc /= 128;
1284 
1285  /* check for outranging on the [ul u l] and
1286  * [ul u ur l] predictors */
1287  if ((transform == 15) || (transform == 13)) {
1288  if (FFABS(predicted_dc - vu) > 128)
1289  predicted_dc = vu;
1290  else if (FFABS(predicted_dc - vl) > 128)
1291  predicted_dc = vl;
1292  else if (FFABS(predicted_dc - vul) > 128)
1293  predicted_dc = vul;
1294  }
1295  }
1296 
1297  /* at long last, apply the predictor */
1298  DC_COEFF(i) += predicted_dc;
1299  /* save the DC */
1300  last_dc[current_frame_type] = DC_COEFF(i);
1301  }
1302  }
1303  }
1304 }
1305 
1306 static void apply_loop_filter(Vp3DecodeContext *s, int plane,
1307  int ystart, int yend)
1308 {
1309  int x, y;
1310  int *bounding_values = s->bounding_values_array + 127;
1311 
1312  int width = s->fragment_width[!!plane];
1313  int height = s->fragment_height[!!plane];
1314  int fragment = s->fragment_start[plane] + ystart * width;
1315  ptrdiff_t stride = s->current_frame.f->linesize[plane];
1316  uint8_t *plane_data = s->current_frame.f->data[plane];
1317  if (!s->flipped_image)
1318  stride = -stride;
1319  plane_data += s->data_offset[plane] + 8 * ystart * stride;
1320 
1321  for (y = ystart; y < yend; y++) {
1322  for (x = 0; x < width; x++) {
1323  /* This code basically just deblocks on the edges of coded blocks.
1324  * However, it has to be much more complicated because of the
1325  * brain damaged deblock ordering used in VP3/Theora. Order matters
1326  * because some pixels get filtered twice. */
1327  if (s->all_fragments[fragment].coding_method != MODE_COPY) {
1328  /* do not perform left edge filter for left columns frags */
1329  if (x > 0) {
1330  s->vp3dsp.h_loop_filter(
1331  plane_data + 8 * x,
1332  stride, bounding_values);
1333  }
1334 
1335  /* do not perform top edge filter for top row fragments */
1336  if (y > 0) {
1337  s->vp3dsp.v_loop_filter(
1338  plane_data + 8 * x,
1339  stride, bounding_values);
1340  }
1341 
1342  /* do not perform right edge filter for right column
1343  * fragments or if right fragment neighbor is also coded
1344  * in this frame (it will be filtered in next iteration) */
1345  if ((x < width - 1) &&
1346  (s->all_fragments[fragment + 1].coding_method == MODE_COPY)) {
1347  s->vp3dsp.h_loop_filter(
1348  plane_data + 8 * x + 8,
1349  stride, bounding_values);
1350  }
1351 
1352  /* do not perform bottom edge filter for bottom row
1353  * fragments or if bottom fragment neighbor is also coded
1354  * in this frame (it will be filtered in the next row) */
1355  if ((y < height - 1) &&
1356  (s->all_fragments[fragment + width].coding_method == MODE_COPY)) {
1357  s->vp3dsp.v_loop_filter(
1358  plane_data + 8 * x + 8 * stride,
1359  stride, bounding_values);
1360  }
1361  }
1362 
1363  fragment++;
1364  }
1365  plane_data += 8 * stride;
1366  }
1367 }
1368 
1369 /**
1370  * Pull DCT tokens from the 64 levels to decode and dequant the coefficients
1371  * for the next block in coding order
1372  */
1373 static inline int vp3_dequant(Vp3DecodeContext *s, Vp3Fragment *frag,
1374  int plane, int inter, int16_t block[64])
1375 {
1376  int16_t *dequantizer = s->qmat[frag->qpi][inter][plane];
1377  uint8_t *perm = s->idct_scantable;
1378  int i = 0;
1379 
1380  do {
1381  int token = *s->dct_tokens[plane][i];
1382  switch (token & 3) {
1383  case 0: // EOB
1384  if (--token < 4) // 0-3 are token types so the EOB run must now be 0
1385  s->dct_tokens[plane][i]++;
1386  else
1387  *s->dct_tokens[plane][i] = token & ~3;
1388  goto end;
1389  case 1: // zero run
1390  s->dct_tokens[plane][i]++;
1391  i += (token >> 2) & 0x7f;
1392  if (i > 63) {
1393  av_log(s->avctx, AV_LOG_ERROR, "Coefficient index overflow\n");
1394  return i;
1395  }
1396  block[perm[i]] = (token >> 9) * dequantizer[perm[i]];
1397  i++;
1398  break;
1399  case 2: // coeff
1400  block[perm[i]] = (token >> 2) * dequantizer[perm[i]];
1401  s->dct_tokens[plane][i++]++;
1402  break;
1403  default: // shouldn't happen
1404  return i;
1405  }
1406  } while (i < 64);
1407  // return value is expected to be a valid level
1408  i--;
1409 end:
1410  // the actual DC+prediction is in the fragment structure
1411  block[0] = frag->dc * s->qmat[0][inter][plane][0];
1412  return i;
1413 }
1414 
1415 /**
1416  * called when all pixels up to row y are complete
1417  */
1418 static void vp3_draw_horiz_band(Vp3DecodeContext *s, int y)
1419 {
1420  int h, cy, i;
1421  int offset[AV_NUM_DATA_POINTERS];
1422 
1423  if (HAVE_THREADS && s->avctx->active_thread_type & FF_THREAD_FRAME) {
1424  int y_flipped = s->flipped_image ? s->height - y : y;
1425 
1426  /* At the end of the frame, report INT_MAX instead of the height of
1427  * the frame. This makes the other threads' ff_thread_await_progress()
1428  * calls cheaper, because they don't have to clip their values. */
1429  ff_thread_report_progress(&s->current_frame,
1430  y_flipped == s->height ? INT_MAX
1431  : y_flipped - 1,
1432  0);
1433  }
1434 
1435  if (!s->avctx->draw_horiz_band)
1436  return;
1437 
1438  h = y - s->last_slice_end;
1439  s->last_slice_end = y;
1440  y -= h;
1441 
1442  if (!s->flipped_image)
1443  y = s->height - y - h;
1444 
1445  cy = y >> s->chroma_y_shift;
1446  offset[0] = s->current_frame.f->linesize[0] * y;
1447  offset[1] = s->current_frame.f->linesize[1] * cy;
1448  offset[2] = s->current_frame.f->linesize[2] * cy;
1449  for (i = 3; i < AV_NUM_DATA_POINTERS; i++)
1450  offset[i] = 0;
1451 
1452  emms_c();
1453  s->avctx->draw_horiz_band(s->avctx, s->current_frame.f, offset, y, 3, h);
1454 }
1455 
1456 /**
1457  * Wait for the reference frame of the current fragment.
1458  * The progress value is in luma pixel rows.
1459  */
1460 static void await_reference_row(Vp3DecodeContext *s, Vp3Fragment *fragment,
1461  int motion_y, int y)
1462 {
1463  ThreadFrame *ref_frame;
1464  int ref_row;
1465  int border = motion_y & 1;
1466 
1467  if (fragment->coding_method == MODE_USING_GOLDEN ||
1468  fragment->coding_method == MODE_GOLDEN_MV)
1469  ref_frame = &s->golden_frame;
1470  else
1471  ref_frame = &s->last_frame;
1472 
1473  ref_row = y + (motion_y >> 1);
1474  ref_row = FFMAX(FFABS(ref_row), ref_row + 8 + border);
1475 
1476  ff_thread_await_progress(ref_frame, ref_row, 0);
1477 }
1478 
1479 /*
1480  * Perform the final rendering for a particular slice of data.
1481  * The slice number ranges from 0..(c_superblock_height - 1).
1482  */
1483 static void render_slice(Vp3DecodeContext *s, int slice)
1484 {
1485  int x, y, i, j, fragment;
1486  int16_t *block = s->block;
1487  int motion_x = 0xdeadbeef, motion_y = 0xdeadbeef;
1488  int motion_halfpel_index;
1489  uint8_t *motion_source;
1490  int plane, first_pixel;
1491 
1492  if (slice >= s->c_superblock_height)
1493  return;
1494 
1495  for (plane = 0; plane < 3; plane++) {
1496  uint8_t *output_plane = s->current_frame.f->data[plane] +
1497  s->data_offset[plane];
1498  uint8_t *last_plane = s->last_frame.f->data[plane] +
1499  s->data_offset[plane];
1500  uint8_t *golden_plane = s->golden_frame.f->data[plane] +
1501  s->data_offset[plane];
1502  ptrdiff_t stride = s->current_frame.f->linesize[plane];
1503  int plane_width = s->width >> (plane && s->chroma_x_shift);
1504  int plane_height = s->height >> (plane && s->chroma_y_shift);
1505  int8_t(*motion_val)[2] = s->motion_val[!!plane];
1506 
1507  int sb_x, sb_y = slice << (!plane && s->chroma_y_shift);
1508  int slice_height = sb_y + 1 + (!plane && s->chroma_y_shift);
1509  int slice_width = plane ? s->c_superblock_width
1510  : s->y_superblock_width;
1511 
1512  int fragment_width = s->fragment_width[!!plane];
1513  int fragment_height = s->fragment_height[!!plane];
1514  int fragment_start = s->fragment_start[plane];
1515 
1516  int do_await = !plane && HAVE_THREADS &&
1517  (s->avctx->active_thread_type & FF_THREAD_FRAME);
1518 
1519  if (!s->flipped_image)
1520  stride = -stride;
1521  if (CONFIG_GRAY && plane && (s->avctx->flags & AV_CODEC_FLAG_GRAY))
1522  continue;
1523 
1524  /* for each superblock row in the slice (both of them)... */
1525  for (; sb_y < slice_height; sb_y++) {
1526  /* for each superblock in a row... */
1527  for (sb_x = 0; sb_x < slice_width; sb_x++) {
1528  /* for each block in a superblock... */
1529  for (j = 0; j < 16; j++) {
1530  x = 4 * sb_x + hilbert_offset[j][0];
1531  y = 4 * sb_y + hilbert_offset[j][1];
1532  fragment = y * fragment_width + x;
1533 
1534  i = fragment_start + fragment;
1535 
1536  // bounds check
1537  if (x >= fragment_width || y >= fragment_height)
1538  continue;
1539 
1540  first_pixel = 8 * y * stride + 8 * x;
1541 
1542  if (do_await &&
1543  s->all_fragments[i].coding_method != MODE_INTRA)
1544  await_reference_row(s, &s->all_fragments[i],
1545  motion_val[fragment][1],
1546  (16 * y) >> s->chroma_y_shift);
1547 
1548  /* transform if this block was coded */
1549  if (s->all_fragments[i].coding_method != MODE_COPY) {
1550  if ((s->all_fragments[i].coding_method == MODE_USING_GOLDEN) ||
1551  (s->all_fragments[i].coding_method == MODE_GOLDEN_MV))
1552  motion_source = golden_plane;
1553  else
1554  motion_source = last_plane;
1555 
1556  motion_source += first_pixel;
1557  motion_halfpel_index = 0;
1558 
1559  /* sort out the motion vector if this fragment is coded
1560  * using a motion vector method */
1561  if ((s->all_fragments[i].coding_method > MODE_INTRA) &&
1562  (s->all_fragments[i].coding_method != MODE_USING_GOLDEN)) {
1563  int src_x, src_y;
1564  motion_x = motion_val[fragment][0];
1565  motion_y = motion_val[fragment][1];
1566 
1567  src_x = (motion_x >> 1) + 8 * x;
1568  src_y = (motion_y >> 1) + 8 * y;
1569 
1570  motion_halfpel_index = motion_x & 0x01;
1571  motion_source += (motion_x >> 1);
1572 
1573  motion_halfpel_index |= (motion_y & 0x01) << 1;
1574  motion_source += ((motion_y >> 1) * stride);
1575 
1576  if (src_x < 0 || src_y < 0 ||
1577  src_x + 9 >= plane_width ||
1578  src_y + 9 >= plane_height) {
1579  uint8_t *temp = s->edge_emu_buffer;
1580  if (stride < 0)
1581  temp -= 8 * stride;
1582 
1583  s->vdsp.emulated_edge_mc(temp, motion_source,
1584  stride, stride,
1585  9, 9, src_x, src_y,
1586  plane_width,
1587  plane_height);
1588  motion_source = temp;
1589  }
1590  }
1591 
1592  /* first, take care of copying a block from either the
1593  * previous or the golden frame */
1594  if (s->all_fragments[i].coding_method != MODE_INTRA) {
1595  /* Note, it is possible to implement all MC cases
1596  * with put_no_rnd_pixels_l2 which would look more
1597  * like the VP3 source but this would be slower as
1598  * put_no_rnd_pixels_tab is better optimized */
1599  if (motion_halfpel_index != 3) {
1600  s->hdsp.put_no_rnd_pixels_tab[1][motion_halfpel_index](
1601  output_plane + first_pixel,
1602  motion_source, stride, 8);
1603  } else {
1604  /* d is 0 if motion_x and _y have the same sign,
1605  * else -1 */
1606  int d = (motion_x ^ motion_y) >> 31;
1607  s->vp3dsp.put_no_rnd_pixels_l2(output_plane + first_pixel,
1608  motion_source - d,
1609  motion_source + stride + 1 + d,
1610  stride, 8);
1611  }
1612  }
1613 
1614  /* invert DCT and place (or add) in final output */
1615 
1616  if (s->all_fragments[i].coding_method == MODE_INTRA) {
1617  vp3_dequant(s, s->all_fragments + i,
1618  plane, 0, block);
1619  s->vp3dsp.idct_put(output_plane + first_pixel,
1620  stride,
1621  block);
1622  } else {
1623  if (vp3_dequant(s, s->all_fragments + i,
1624  plane, 1, block)) {
1625  s->vp3dsp.idct_add(output_plane + first_pixel,
1626  stride,
1627  block);
1628  } else {
1629  s->vp3dsp.idct_dc_add(output_plane + first_pixel,
1630  stride, block);
1631  }
1632  }
1633  } else {
1634  /* copy directly from the previous frame */
1635  s->hdsp.put_pixels_tab[1][0](
1636  output_plane + first_pixel,
1637  last_plane + first_pixel,
1638  stride, 8);
1639  }
1640  }
1641  }
1642 
1643  // Filter up to the last row in the superblock row
1644  if (!s->skip_loop_filter)
1645  apply_loop_filter(s, plane, 4 * sb_y - !!sb_y,
1646  FFMIN(4 * sb_y + 3, fragment_height - 1));
1647  }
1648  }
1649 
1650  /* this looks like a good place for slice dispatch... */
1651  /* algorithm:
1652  * if (slice == s->macroblock_height - 1)
1653  * dispatch (both last slice & 2nd-to-last slice);
1654  * else if (slice > 0)
1655  * dispatch (slice - 1);
1656  */
1657 
1658  vp3_draw_horiz_band(s, FFMIN((32 << s->chroma_y_shift) * (slice + 1) - 16,
1659  s->height - 16));
1660 }
1661 
1662 /// Allocate tables for per-frame data in Vp3DecodeContext
1663 static av_cold int allocate_tables(AVCodecContext *avctx)
1664 {
1665  Vp3DecodeContext *s = avctx->priv_data;
1666  int y_fragment_count, c_fragment_count;
1667 
1668  free_tables(avctx);
1669 
1670  y_fragment_count = s->fragment_width[0] * s->fragment_height[0];
1671  c_fragment_count = s->fragment_width[1] * s->fragment_height[1];
1672 
1673  s->superblock_coding = av_mallocz(s->superblock_count);
1674  s->all_fragments = av_mallocz_array(s->fragment_count, sizeof(Vp3Fragment));
1675 
1676  s->coded_fragment_list[0] = av_mallocz_array(s->fragment_count, sizeof(int));
1677 
1678  s->dct_tokens_base = av_mallocz_array(s->fragment_count,
1679  64 * sizeof(*s->dct_tokens_base));
1680  s->motion_val[0] = av_mallocz_array(y_fragment_count, sizeof(*s->motion_val[0]));
1681  s->motion_val[1] = av_mallocz_array(c_fragment_count, sizeof(*s->motion_val[1]));
1682 
1683  /* work out the block mapping tables */
1684  s->superblock_fragments = av_mallocz_array(s->superblock_count, 16 * sizeof(int));
1685  s->macroblock_coding = av_mallocz(s->macroblock_count + 1);
1686 
1687  if (!s->superblock_coding || !s->all_fragments ||
1688  !s->dct_tokens_base || !s->coded_fragment_list[0] ||
1689  !s->superblock_fragments || !s->macroblock_coding ||
1690  !s->motion_val[0] || !s->motion_val[1]) {
1691  vp3_decode_end(avctx);
1692  return -1;
1693  }
1694 
1695  init_block_mapping(s);
1696 
1697  return 0;
1698 }
1699 
1700 static av_cold int init_frames(Vp3DecodeContext *s)
1701 {
1702  s->current_frame.f = av_frame_alloc();
1703  s->last_frame.f = av_frame_alloc();
1704  s->golden_frame.f = av_frame_alloc();
1705 
1706  if (!s->current_frame.f || !s->last_frame.f || !s->golden_frame.f) {
1707  av_frame_free(&s->current_frame.f);
1708  av_frame_free(&s->last_frame.f);
1709  av_frame_free(&s->golden_frame.f);
1710  return AVERROR(ENOMEM);
1711  }
1712 
1713  return 0;
1714 }
1715 
1716 static av_cold int vp3_decode_init(AVCodecContext *avctx)
1717 {
1718  Vp3DecodeContext *s = avctx->priv_data;
1719  int i, inter, plane, ret;
1720  int c_width;
1721  int c_height;
1722  int y_fragment_count, c_fragment_count;
1723 
1724  ret = init_frames(s);
1725  if (ret < 0)
1726  return ret;
1727 
1728  avctx->internal->allocate_progress = 1;
1729 
1730  if (avctx->codec_tag == MKTAG('V', 'P', '3', '0'))
1731  s->version = 0;
1732  else
1733  s->version = 1;
1734 
1735  s->avctx = avctx;
1736  s->width = FFALIGN(avctx->coded_width, 16);
1737  s->height = FFALIGN(avctx->coded_height, 16);
1738  if (avctx->codec_id != AV_CODEC_ID_THEORA)
1739  avctx->pix_fmt = AV_PIX_FMT_YUV420P;
1740  avctx->chroma_sample_location = AVCHROMA_LOC_CENTER;
1741  ff_hpeldsp_init(&s->hdsp, avctx->flags | AV_CODEC_FLAG_BITEXACT);
1742  ff_videodsp_init(&s->vdsp, 8);
1743  ff_vp3dsp_init(&s->vp3dsp, avctx->flags);
1744 
1745  for (i = 0; i < 64; i++) {
1746 #define TRANSPOSE(x) (((x) >> 3) | (((x) & 7) << 3))
1747  s->idct_permutation[i] = TRANSPOSE(i);
1748  s->idct_scantable[i] = TRANSPOSE(ff_zigzag_direct[i]);
1749 #undef TRANSPOSE
1750  }
1751 
1752  /* initialize to an impossible value which will force a recalculation
1753  * in the first frame decode */
1754  for (i = 0; i < 3; i++)
1755  s->qps[i] = -1;
1756 
1757  avcodec_get_chroma_sub_sample(avctx->pix_fmt, &s->chroma_x_shift, &s->chroma_y_shift);
1758 
1759  s->y_superblock_width = (s->width + 31) / 32;
1760  s->y_superblock_height = (s->height + 31) / 32;
1761  s->y_superblock_count = s->y_superblock_width * s->y_superblock_height;
1762 
1763  /* work out the dimensions for the C planes */
1764  c_width = s->width >> s->chroma_x_shift;
1765  c_height = s->height >> s->chroma_y_shift;
1766  s->c_superblock_width = (c_width + 31) / 32;
1767  s->c_superblock_height = (c_height + 31) / 32;
1768  s->c_superblock_count = s->c_superblock_width * s->c_superblock_height;
1769 
1770  s->superblock_count = s->y_superblock_count + (s->c_superblock_count * 2);
1771  s->u_superblock_start = s->y_superblock_count;
1772  s->v_superblock_start = s->u_superblock_start + s->c_superblock_count;
1773 
1774  s->macroblock_width = (s->width + 15) / 16;
1775  s->macroblock_height = (s->height + 15) / 16;
1776  s->macroblock_count = s->macroblock_width * s->macroblock_height;
1777 
1778  s->fragment_width[0] = s->width / FRAGMENT_PIXELS;
1779  s->fragment_height[0] = s->height / FRAGMENT_PIXELS;
1780  s->fragment_width[1] = s->fragment_width[0] >> s->chroma_x_shift;
1781  s->fragment_height[1] = s->fragment_height[0] >> s->chroma_y_shift;
1782 
1783  /* fragment count covers all 8x8 blocks for all 3 planes */
1784  y_fragment_count = s->fragment_width[0] * s->fragment_height[0];
1785  c_fragment_count = s->fragment_width[1] * s->fragment_height[1];
1786  s->fragment_count = y_fragment_count + 2 * c_fragment_count;
1787  s->fragment_start[1] = y_fragment_count;
1788  s->fragment_start[2] = y_fragment_count + c_fragment_count;
1789 
1790  if (!s->theora_tables) {
1791  for (i = 0; i < 64; i++) {
1792  s->coded_dc_scale_factor[i] = vp31_dc_scale_factor[i];
1793  s->coded_ac_scale_factor[i] = vp31_ac_scale_factor[i];
1794  s->base_matrix[0][i] = vp31_intra_y_dequant[i];
1795  s->base_matrix[1][i] = vp31_intra_c_dequant[i];
1796  s->base_matrix[2][i] = vp31_inter_dequant[i];
1797  s->filter_limit_values[i] = vp31_filter_limit_values[i];
1798  }
1799 
1800  for (inter = 0; inter < 2; inter++) {
1801  for (plane = 0; plane < 3; plane++) {
1802  s->qr_count[inter][plane] = 1;
1803  s->qr_size[inter][plane][0] = 63;
1804  s->qr_base[inter][plane][0] =
1805  s->qr_base[inter][plane][1] = 2 * inter + (!!plane) * !inter;
1806  }
1807  }
1808 
1809  /* init VLC tables */
1810  for (i = 0; i < 16; i++) {
1811  /* DC histograms */
1812  init_vlc(&s->dc_vlc[i], 11, 32,
1813  &dc_bias[i][0][1], 4, 2,
1814  &dc_bias[i][0][0], 4, 2, 0);
1815 
1816  /* group 1 AC histograms */
1817  init_vlc(&s->ac_vlc_1[i], 11, 32,
1818  &ac_bias_0[i][0][1], 4, 2,
1819  &ac_bias_0[i][0][0], 4, 2, 0);
1820 
1821  /* group 2 AC histograms */
1822  init_vlc(&s->ac_vlc_2[i], 11, 32,
1823  &ac_bias_1[i][0][1], 4, 2,
1824  &ac_bias_1[i][0][0], 4, 2, 0);
1825 
1826  /* group 3 AC histograms */
1827  init_vlc(&s->ac_vlc_3[i], 11, 32,
1828  &ac_bias_2[i][0][1], 4, 2,
1829  &ac_bias_2[i][0][0], 4, 2, 0);
1830 
1831  /* group 4 AC histograms */
1832  init_vlc(&s->ac_vlc_4[i], 11, 32,
1833  &ac_bias_3[i][0][1], 4, 2,
1834  &ac_bias_3[i][0][0], 4, 2, 0);
1835  }
1836  } else {
1837  for (i = 0; i < 16; i++) {
1838  /* DC histograms */
1839  if (init_vlc(&s->dc_vlc[i], 11, 32,
1840  &s->huffman_table[i][0][1], 8, 4,
1841  &s->huffman_table[i][0][0], 8, 4, 0) < 0)
1842  goto vlc_fail;
1843 
1844  /* group 1 AC histograms */
1845  if (init_vlc(&s->ac_vlc_1[i], 11, 32,
1846  &s->huffman_table[i + 16][0][1], 8, 4,
1847  &s->huffman_table[i + 16][0][0], 8, 4, 0) < 0)
1848  goto vlc_fail;
1849 
1850  /* group 2 AC histograms */
1851  if (init_vlc(&s->ac_vlc_2[i], 11, 32,
1852  &s->huffman_table[i + 16 * 2][0][1], 8, 4,
1853  &s->huffman_table[i + 16 * 2][0][0], 8, 4, 0) < 0)
1854  goto vlc_fail;
1855 
1856  /* group 3 AC histograms */
1857  if (init_vlc(&s->ac_vlc_3[i], 11, 32,
1858  &s->huffman_table[i + 16 * 3][0][1], 8, 4,
1859  &s->huffman_table[i + 16 * 3][0][0], 8, 4, 0) < 0)
1860  goto vlc_fail;
1861 
1862  /* group 4 AC histograms */
1863  if (init_vlc(&s->ac_vlc_4[i], 11, 32,
1864  &s->huffman_table[i + 16 * 4][0][1], 8, 4,
1865  &s->huffman_table[i + 16 * 4][0][0], 8, 4, 0) < 0)
1866  goto vlc_fail;
1867  }
1868  }
1869 
1870  init_vlc(&s->superblock_run_length_vlc, 6, 34,
1871  &superblock_run_length_vlc_table[0][1], 4, 2,
1872  &superblock_run_length_vlc_table[0][0], 4, 2, 0);
1873 
1874  init_vlc(&s->fragment_run_length_vlc, 5, 30,
1875  &fragment_run_length_vlc_table[0][1], 4, 2,
1876  &fragment_run_length_vlc_table[0][0], 4, 2, 0);
1877 
1878  init_vlc(&s->mode_code_vlc, 3, 8,
1879  &mode_code_vlc_table[0][1], 2, 1,
1880  &mode_code_vlc_table[0][0], 2, 1, 0);
1881 
1882  init_vlc(&s->motion_vector_vlc, 6, 63,
1883  &motion_vector_vlc_table[0][1], 2, 1,
1884  &motion_vector_vlc_table[0][0], 2, 1, 0);
1885 
1886  return allocate_tables(avctx);
1887 
1888 vlc_fail:
1889  av_log(avctx, AV_LOG_FATAL, "Invalid huffman table\n");
1890  return -1;
1891 }
1892 
1893 /// Release and shuffle frames after decode finishes
1894 static int update_frames(AVCodecContext *avctx)
1895 {
1896  Vp3DecodeContext *s = avctx->priv_data;
1897  int ret = 0;
1898 
1899  /* shuffle frames (last = current) */
1900  ff_thread_release_buffer(avctx, &s->last_frame);
1901  ret = ff_thread_ref_frame(&s->last_frame, &s->current_frame);
1902  if (ret < 0)
1903  goto fail;
1904 
1905  if (s->keyframe) {
1906  ff_thread_release_buffer(avctx, &s->golden_frame);
1907  ret = ff_thread_ref_frame(&s->golden_frame, &s->current_frame);
1908  }
1909 
1910 fail:
1911  ff_thread_release_buffer(avctx, &s->current_frame);
1912  return ret;
1913 }
1914 
1915 static int ref_frame(Vp3DecodeContext *s, ThreadFrame *dst, ThreadFrame *src)
1916 {
1917  ff_thread_release_buffer(s->avctx, dst);
1918  if (src->f->data[0])
1919  return ff_thread_ref_frame(dst, src);
1920  return 0;
1921 }
1922 
1923 static int ref_frames(Vp3DecodeContext *dst, Vp3DecodeContext *src)
1924 {
1925  int ret;
1926  if ((ret = ref_frame(dst, &dst->current_frame, &src->current_frame)) < 0 ||
1927  (ret = ref_frame(dst, &dst->golden_frame, &src->golden_frame)) < 0 ||
1928  (ret = ref_frame(dst, &dst->last_frame, &src->last_frame)) < 0)
1929  return ret;
1930  return 0;
1931 }
1932 
1933 #if HAVE_THREADS
1934 static int vp3_update_thread_context(AVCodecContext *dst, const AVCodecContext *src)
1935 {
1936  Vp3DecodeContext *s = dst->priv_data, *s1 = src->priv_data;
1937  int qps_changed = 0, i, err;
1938 
1939 #define copy_fields(to, from, start_field, end_field) \
1940  memcpy(&to->start_field, &from->start_field, \
1941  (char *) &to->end_field - (char *) &to->start_field)
1942 
1943  if (!s1->current_frame.f->data[0] ||
1944  s->width != s1->width || s->height != s1->height) {
1945  if (s != s1)
1946  ref_frames(s, s1);
1947  return -1;
1948  }
1949 
1950  if (s != s1) {
1951  if (!s->current_frame.f)
1952  return AVERROR(ENOMEM);
1953  // init tables if the first frame hasn't been decoded
1954  if (!s->current_frame.f->data[0]) {
1955  int y_fragment_count, c_fragment_count;
1956  s->avctx = dst;
1957  err = allocate_tables(dst);
1958  if (err)
1959  return err;
1960  y_fragment_count = s->fragment_width[0] * s->fragment_height[0];
1961  c_fragment_count = s->fragment_width[1] * s->fragment_height[1];
1962  memcpy(s->motion_val[0], s1->motion_val[0],
1963  y_fragment_count * sizeof(*s->motion_val[0]));
1964  memcpy(s->motion_val[1], s1->motion_val[1],
1965  c_fragment_count * sizeof(*s->motion_val[1]));
1966  }
1967 
1968  // copy previous frame data
1969  if ((err = ref_frames(s, s1)) < 0)
1970  return err;
1971 
1972  s->keyframe = s1->keyframe;
1973 
1974  // copy qscale data if necessary
1975  for (i = 0; i < 3; i++) {
1976  if (s->qps[i] != s1->qps[1]) {
1977  qps_changed = 1;
1978  memcpy(&s->qmat[i], &s1->qmat[i], sizeof(s->qmat[i]));
1979  }
1980  }
1981 
1982  if (s->qps[0] != s1->qps[0])
1983  memcpy(&s->bounding_values_array, &s1->bounding_values_array,
1984  sizeof(s->bounding_values_array));
1985 
1986  if (qps_changed)
1987  copy_fields(s, s1, qps, superblock_count);
1988 #undef copy_fields
1989  }
1990 
1991  return update_frames(dst);
1992 }
1993 #endif
1994 
1995 static int vp3_decode_frame(AVCodecContext *avctx,
1996  void *data, int *got_frame,
1997  AVPacket *avpkt)
1998 {
1999  const uint8_t *buf = avpkt->data;
2000  int buf_size = avpkt->size;
2001  Vp3DecodeContext *s = avctx->priv_data;
2002  GetBitContext gb;
2003  int i, ret;
2004 
2005  if ((ret = init_get_bits8(&gb, buf, buf_size)) < 0)
2006  return ret;
2007 
2008 #if CONFIG_THEORA_DECODER
2009  if (s->theora && get_bits1(&gb)) {
2010  int type = get_bits(&gb, 7);
2011  skip_bits_long(&gb, 6*8); /* "theora" */
2012 
2013  if (s->avctx->active_thread_type&FF_THREAD_FRAME) {
2014  av_log(avctx, AV_LOG_ERROR, "midstream reconfiguration with multithreading is unsupported, try -threads 1\n");
2015  return AVERROR_PATCHWELCOME;
2016  }
2017  if (type == 0) {
2018  vp3_decode_end(avctx);
2019  ret = theora_decode_header(avctx, &gb);
2020 
2021  if (ret >= 0)
2022  ret = vp3_decode_init(avctx);
2023  if (ret < 0) {
2024  vp3_decode_end(avctx);
2025  }
2026  return ret;
2027  } else if (type == 2) {
2028  vp3_decode_end(avctx);
2029  ret = theora_decode_tables(avctx, &gb);
2030  if (ret >= 0)
2031  ret = vp3_decode_init(avctx);
2032  if (ret < 0) {
2033  vp3_decode_end(avctx);
2034  }
2035  return ret;
2036  }
2037 
2038  av_log(avctx, AV_LOG_ERROR,
2039  "Header packet passed to frame decoder, skipping\n");
2040  return -1;
2041  }
2042 #endif
2043 
2044  s->keyframe = !get_bits1(&gb);
2045  if (!s->all_fragments) {
2046  av_log(avctx, AV_LOG_ERROR, "Data packet without prior valid headers\n");
2047  return -1;
2048  }
2049  if (!s->theora)
2050  skip_bits(&gb, 1);
2051  for (i = 0; i < 3; i++)
2052  s->last_qps[i] = s->qps[i];
2053 
2054  s->nqps = 0;
2055  do {
2056  s->qps[s->nqps++] = get_bits(&gb, 6);
2057  } while (s->theora >= 0x030200 && s->nqps < 3 && get_bits1(&gb));
2058  for (i = s->nqps; i < 3; i++)
2059  s->qps[i] = -1;
2060 
2061  if (s->avctx->debug & FF_DEBUG_PICT_INFO)
2062  av_log(s->avctx, AV_LOG_INFO, " VP3 %sframe #%d: Q index = %d\n",
2063  s->keyframe ? "key" : "", avctx->frame_number + 1, s->qps[0]);
2064 
2065  s->skip_loop_filter = !s->filter_limit_values[s->qps[0]] ||
2066  avctx->skip_loop_filter >= (s->keyframe ? AVDISCARD_ALL
2067  : AVDISCARD_NONKEY);
2068 
2069  if (s->qps[0] != s->last_qps[0])
2070  init_loop_filter(s);
2071 
2072  for (i = 0; i < s->nqps; i++)
2073  // reinit all dequantizers if the first one changed, because
2074  // the DC of the first quantizer must be used for all matrices
2075  if (s->qps[i] != s->last_qps[i] || s->qps[0] != s->last_qps[0])
2076  init_dequantizer(s, i);
2077 
2078  if (avctx->skip_frame >= AVDISCARD_NONKEY && !s->keyframe)
2079  return buf_size;
2080 
2081  s->current_frame.f->pict_type = s->keyframe ? AV_PICTURE_TYPE_I
2082  : AV_PICTURE_TYPE_P;
2083  s->current_frame.f->key_frame = s->keyframe;
2084  if (ff_thread_get_buffer(avctx, &s->current_frame, AV_GET_BUFFER_FLAG_REF) < 0)
2085  goto error;
2086 
2087  if (!s->edge_emu_buffer)
2088  s->edge_emu_buffer = av_malloc(9 * FFABS(s->current_frame.f->linesize[0]));
2089 
2090  if (s->keyframe) {
2091  if (!s->theora) {
2092  skip_bits(&gb, 4); /* width code */
2093  skip_bits(&gb, 4); /* height code */
2094  if (s->version) {
2095  s->version = get_bits(&gb, 5);
2096  if (avctx->frame_number == 0)
2097  av_log(s->avctx, AV_LOG_DEBUG,
2098  "VP version: %d\n", s->version);
2099  }
2100  }
2101  if (s->version || s->theora) {
2102  if (get_bits1(&gb))
2103  av_log(s->avctx, AV_LOG_ERROR,
2104  "Warning, unsupported keyframe coding type?!\n");
2105  skip_bits(&gb, 2); /* reserved? */
2106  }
2107  } else {
2108  if (!s->golden_frame.f->data[0]) {
2109  av_log(s->avctx, AV_LOG_WARNING,
2110  "vp3: first frame not a keyframe\n");
2111 
2112  s->golden_frame.f->pict_type = AV_PICTURE_TYPE_I;
2113  if (ff_thread_get_buffer(avctx, &s->golden_frame,
2114  AV_GET_BUFFER_FLAG_REF) < 0)
2115  goto error;
2116  ff_thread_release_buffer(avctx, &s->last_frame);
2117  if ((ret = ff_thread_ref_frame(&s->last_frame,
2118  &s->golden_frame)) < 0)
2119  goto error;
2120  ff_thread_report_progress(&s->last_frame, INT_MAX, 0);
2121  }
2122  }
2123 
2124  memset(s->all_fragments, 0, s->fragment_count * sizeof(Vp3Fragment));
2125  ff_thread_finish_setup(avctx);
2126 
2127  if (unpack_superblocks(s, &gb)) {
2128  av_log(s->avctx, AV_LOG_ERROR, "error in unpack_superblocks\n");
2129  goto error;
2130  }
2131  if (unpack_modes(s, &gb)) {
2132  av_log(s->avctx, AV_LOG_ERROR, "error in unpack_modes\n");
2133  goto error;
2134  }
2135  if (unpack_vectors(s, &gb)) {
2136  av_log(s->avctx, AV_LOG_ERROR, "error in unpack_vectors\n");
2137  goto error;
2138  }
2139  if (unpack_block_qpis(s, &gb)) {
2140  av_log(s->avctx, AV_LOG_ERROR, "error in unpack_block_qpis\n");
2141  goto error;
2142  }
2143  if (unpack_dct_coeffs(s, &gb)) {
2144  av_log(s->avctx, AV_LOG_ERROR, "error in unpack_dct_coeffs\n");
2145  goto error;
2146  }
2147 
2148  for (i = 0; i < 3; i++) {
2149  int height = s->height >> (i && s->chroma_y_shift);
2150  if (s->flipped_image)
2151  s->data_offset[i] = 0;
2152  else
2153  s->data_offset[i] = (height - 1) * s->current_frame.f->linesize[i];
2154  }
2155 
2156  s->last_slice_end = 0;
2157  for (i = 0; i < s->c_superblock_height; i++)
2158  render_slice(s, i);
2159 
2160  // filter the last row
2161  for (i = 0; i < 3; i++) {
2162  int row = (s->height >> (3 + (i && s->chroma_y_shift))) - 1;
2163  apply_loop_filter(s, i, row, row + 1);
2164  }
2165  vp3_draw_horiz_band(s, s->height);
2166 
2167  /* output frame, offset as needed */
2168  if ((ret = av_frame_ref(data, s->current_frame.f)) < 0)
2169  return ret;
2170  for (i = 0; i < 3; i++) {
2171  AVFrame *dst = data;
2172  int off = (s->offset_x >> (i && s->chroma_y_shift)) +
2173  (s->offset_y >> (i && s->chroma_y_shift)) * dst->linesize[i];
2174  dst->data[i] += off;
2175  }
2176  *got_frame = 1;
2177 
2178  if (!HAVE_THREADS || !(s->avctx->active_thread_type & FF_THREAD_FRAME)) {
2179  ret = update_frames(avctx);
2180  if (ret < 0)
2181  return ret;
2182  }
2183 
2184  return buf_size;
2185 
2186 error:
2187  ff_thread_report_progress(&s->current_frame, INT_MAX, 0);
2188 
2189  if (!HAVE_THREADS || !(s->avctx->active_thread_type & FF_THREAD_FRAME))
2190  av_frame_unref(s->current_frame.f);
2191 
2192  return -1;
2193 }
2194 
2195 static int read_huffman_tree(AVCodecContext *avctx, GetBitContext *gb)
2196 {
2197  Vp3DecodeContext *s = avctx->priv_data;
2198 
2199  if (get_bits1(gb)) {
2200  int token;
2201  if (s->entries >= 32) { /* overflow */
2202  av_log(avctx, AV_LOG_ERROR, "huffman tree overflow\n");
2203  return -1;
2204  }
2205  token = get_bits(gb, 5);
2206  ff_dlog(avctx, "hti %d hbits %x token %d entry : %d size %d\n",
2207  s->hti, s->hbits, token, s->entries, s->huff_code_size);
2208  s->huffman_table[s->hti][token][0] = s->hbits;
2209  s->huffman_table[s->hti][token][1] = s->huff_code_size;
2210  s->entries++;
2211  } else {
2212  if (s->huff_code_size >= 32) { /* overflow */
2213  av_log(avctx, AV_LOG_ERROR, "huffman tree overflow\n");
2214  return -1;
2215  }
2216  s->huff_code_size++;
2217  s->hbits <<= 1;
2218  if (read_huffman_tree(avctx, gb))
2219  return -1;
2220  s->hbits |= 1;
2221  if (read_huffman_tree(avctx, gb))
2222  return -1;
2223  s->hbits >>= 1;
2224  s->huff_code_size--;
2225  }
2226  return 0;
2227 }
2228 
2229 #if HAVE_THREADS
2230 static int vp3_init_thread_copy(AVCodecContext *avctx)
2231 {
2232  Vp3DecodeContext *s = avctx->priv_data;
2233 
2234  s->superblock_coding = NULL;
2235  s->all_fragments = NULL;
2236  s->coded_fragment_list[0] = NULL;
2237  s->dct_tokens_base = NULL;
2238  s->superblock_fragments = NULL;
2239  s->macroblock_coding = NULL;
2240  s->motion_val[0] = NULL;
2241  s->motion_val[1] = NULL;
2242  s->edge_emu_buffer = NULL;
2243 
2244  return init_frames(s);
2245 }
2246 #endif
2247 
2248 #if CONFIG_THEORA_DECODER
2249 static const enum AVPixelFormat theora_pix_fmts[4] = {
2250  AV_PIX_FMT_YUV420P, AV_PIX_FMT_NONE, AV_PIX_FMT_YUV422P, AV_PIX_FMT_YUV444P
2251 };
2252 
2253 static int theora_decode_header(AVCodecContext *avctx, GetBitContext *gb)
2254 {
2255  Vp3DecodeContext *s = avctx->priv_data;
2256  int visible_width, visible_height, colorspace;
2257  uint8_t offset_x = 0, offset_y = 0;
2258  int ret;
2259  AVRational fps, aspect;
2260 
2261  s->theora_header = 0;
2262  s->theora = get_bits_long(gb, 24);
2263  av_log(avctx, AV_LOG_DEBUG, "Theora bitstream version %X\n", s->theora);
2264 
2265  /* 3.2.0 aka alpha3 has the same frame orientation as original vp3
2266  * but previous versions have the image flipped relative to vp3 */
2267  if (s->theora < 0x030200) {
2268  s->flipped_image = 1;
2269  av_log(avctx, AV_LOG_DEBUG,
2270  "Old (<alpha3) Theora bitstream, flipped image\n");
2271  }
2272 
2273  visible_width =
2274  s->width = get_bits(gb, 16) << 4;
2275  visible_height =
2276  s->height = get_bits(gb, 16) << 4;
2277 
2278  if (s->theora >= 0x030200) {
2279  visible_width = get_bits_long(gb, 24);
2280  visible_height = get_bits_long(gb, 24);
2281 
2282  offset_x = get_bits(gb, 8); /* offset x */
2283  offset_y = get_bits(gb, 8); /* offset y, from bottom */
2284  }
2285 
2286  /* sanity check */
2287  if (av_image_check_size(visible_width, visible_height, 0, avctx) < 0 ||
2288  visible_width + offset_x > s->width ||
2289  visible_height + offset_y > s->height) {
2290  av_log(avctx, AV_LOG_ERROR,
2291  "Invalid frame dimensions - w:%d h:%d x:%d y:%d (%dx%d).\n",
2292  visible_width, visible_height, offset_x, offset_y,
2293  s->width, s->height);
2294  return AVERROR_INVALIDDATA;
2295  }
2296 
2297  fps.num = get_bits_long(gb, 32);
2298  fps.den = get_bits_long(gb, 32);
2299  if (fps.num && fps.den) {
2300  if (fps.num < 0 || fps.den < 0) {
2301  av_log(avctx, AV_LOG_ERROR, "Invalid framerate\n");
2302  return AVERROR_INVALIDDATA;
2303  }
2304  av_reduce(&avctx->framerate.den, &avctx->framerate.num,
2305  fps.den, fps.num, 1 << 30);
2306  }
2307 
2308  aspect.num = get_bits_long(gb, 24);
2309  aspect.den = get_bits_long(gb, 24);
2310  if (aspect.num && aspect.den) {
2311  av_reduce(&avctx->sample_aspect_ratio.num,
2312  &avctx->sample_aspect_ratio.den,
2313  aspect.num, aspect.den, 1 << 30);
2314  ff_set_sar(avctx, avctx->sample_aspect_ratio);
2315  }
2316 
2317  if (s->theora < 0x030200)
2318  skip_bits(gb, 5); /* keyframe frequency force */
2319  colorspace = get_bits(gb, 8);
2320  skip_bits(gb, 24); /* bitrate */
2321 
2322  skip_bits(gb, 6); /* quality hint */
2323 
2324  if (s->theora >= 0x030200) {
2325  skip_bits(gb, 5); /* keyframe frequency force */
2326  avctx->pix_fmt = theora_pix_fmts[get_bits(gb, 2)];
2327  if (avctx->pix_fmt == AV_PIX_FMT_NONE) {
2328  av_log(avctx, AV_LOG_ERROR, "Invalid pixel format\n");
2329  return AVERROR_INVALIDDATA;
2330  }
2331  skip_bits(gb, 3); /* reserved */
2332  } else
2333  avctx->pix_fmt = AV_PIX_FMT_YUV420P;
2334 
2335  ret = ff_set_dimensions(avctx, s->width, s->height);
2336  if (ret < 0)
2337  return ret;
2338  if (!(avctx->flags2 & AV_CODEC_FLAG2_IGNORE_CROP)) {
2339  avctx->width = visible_width;
2340  avctx->height = visible_height;
2341  // translate offsets from theora axis ([0,0] lower left)
2342  // to normal axis ([0,0] upper left)
2343  s->offset_x = offset_x;
2344  s->offset_y = s->height - visible_height - offset_y;
2345 
2346  if ((s->offset_x & 0x1F) && !(avctx->flags & AV_CODEC_FLAG_UNALIGNED)) {
2347  s->offset_x &= ~0x1F;
2348  if (!s->offset_x_warned) {
2349  s->offset_x_warned = 1;
2350  av_log(avctx, AV_LOG_WARNING, "Reducing offset_x from %d to %d"
2351  "chroma samples to preserve alignment.\n",
2352  offset_x, s->offset_x);
2353  }
2354  }
2355  }
2356 
2357  if (colorspace == 1)
2358  avctx->color_primaries = AVCOL_PRI_BT470M;
2359  else if (colorspace == 2)
2360  avctx->color_primaries = AVCOL_PRI_BT470BG;
2361 
2362  if (colorspace == 1 || colorspace == 2) {
2363  avctx->colorspace = AVCOL_SPC_BT470BG;
2364  avctx->color_trc = AVCOL_TRC_BT709;
2365  }
2366 
2367  s->theora_header = 1;
2368  return 0;
2369 }
2370 
2371 static int theora_decode_tables(AVCodecContext *avctx, GetBitContext *gb)
2372 {
2373  Vp3DecodeContext *s = avctx->priv_data;
2374  int i, n, matrices, inter, plane;
2375 
2376  if (!s->theora_header)
2377  return AVERROR_INVALIDDATA;
2378 
2379  if (s->theora >= 0x030200) {
2380  n = get_bits(gb, 3);
2381  /* loop filter limit values table */
2382  if (n)
2383  for (i = 0; i < 64; i++)
2384  s->filter_limit_values[i] = get_bits(gb, n);
2385  }
2386 
2387  if (s->theora >= 0x030200)
2388  n = get_bits(gb, 4) + 1;
2389  else
2390  n = 16;
2391  /* quality threshold table */
2392  for (i = 0; i < 64; i++)
2393  s->coded_ac_scale_factor[i] = get_bits(gb, n);
2394 
2395  if (s->theora >= 0x030200)
2396  n = get_bits(gb, 4) + 1;
2397  else
2398  n = 16;
2399  /* dc scale factor table */
2400  for (i = 0; i < 64; i++)
2401  s->coded_dc_scale_factor[i] = get_bits(gb, n);
2402 
2403  if (s->theora >= 0x030200)
2404  matrices = get_bits(gb, 9) + 1;
2405  else
2406  matrices = 3;
2407 
2408  if (matrices > 384) {
2409  av_log(avctx, AV_LOG_ERROR, "invalid number of base matrixes\n");
2410  return -1;
2411  }
2412 
2413  for (n = 0; n < matrices; n++)
2414  for (i = 0; i < 64; i++)
2415  s->base_matrix[n][i] = get_bits(gb, 8);
2416 
2417  for (inter = 0; inter <= 1; inter++) {
2418  for (plane = 0; plane <= 2; plane++) {
2419  int newqr = 1;
2420  if (inter || plane > 0)
2421  newqr = get_bits1(gb);
2422  if (!newqr) {
2423  int qtj, plj;
2424  if (inter && get_bits1(gb)) {
2425  qtj = 0;
2426  plj = plane;
2427  } else {
2428  qtj = (3 * inter + plane - 1) / 3;
2429  plj = (plane + 2) % 3;
2430  }
2431  s->qr_count[inter][plane] = s->qr_count[qtj][plj];
2432  memcpy(s->qr_size[inter][plane], s->qr_size[qtj][plj],
2433  sizeof(s->qr_size[0][0]));
2434  memcpy(s->qr_base[inter][plane], s->qr_base[qtj][plj],
2435  sizeof(s->qr_base[0][0]));
2436  } else {
2437  int qri = 0;
2438  int qi = 0;
2439 
2440  for (;;) {
2441  i = get_bits(gb, av_log2(matrices - 1) + 1);
2442  if (i >= matrices) {
2443  av_log(avctx, AV_LOG_ERROR,
2444  "invalid base matrix index\n");
2445  return -1;
2446  }
2447  s->qr_base[inter][plane][qri] = i;
2448  if (qi >= 63)
2449  break;
2450  i = get_bits(gb, av_log2(63 - qi) + 1) + 1;
2451  s->qr_size[inter][plane][qri++] = i;
2452  qi += i;
2453  }
2454 
2455  if (qi > 63) {
2456  av_log(avctx, AV_LOG_ERROR, "invalid qi %d > 63\n", qi);
2457  return -1;
2458  }
2459  s->qr_count[inter][plane] = qri;
2460  }
2461  }
2462  }
2463 
2464  /* Huffman tables */
2465  for (s->hti = 0; s->hti < 80; s->hti++) {
2466  s->entries = 0;
2467  s->huff_code_size = 1;
2468  if (!get_bits1(gb)) {
2469  s->hbits = 0;
2470  if (read_huffman_tree(avctx, gb))
2471  return -1;
2472  s->hbits = 1;
2473  if (read_huffman_tree(avctx, gb))
2474  return -1;
2475  }
2476  }
2477 
2478  s->theora_tables = 1;
2479 
2480  return 0;
2481 }
2482 
2483 static av_cold int theora_decode_init(AVCodecContext *avctx)
2484 {
2485  Vp3DecodeContext *s = avctx->priv_data;
2486  GetBitContext gb;
2487  int ptype;
2488  const uint8_t *header_start[3];
2489  int header_len[3];
2490  int i;
2491  int ret;
2492 
2493  avctx->pix_fmt = AV_PIX_FMT_YUV420P;
2494 
2495  s->theora = 1;
2496 
2497  if (!avctx->extradata_size) {
2498  av_log(avctx, AV_LOG_ERROR, "Missing extradata!\n");
2499  return -1;
2500  }
2501 
2502  if (avpriv_split_xiph_headers(avctx->extradata, avctx->extradata_size,
2503  42, header_start, header_len) < 0) {
2504  av_log(avctx, AV_LOG_ERROR, "Corrupt extradata\n");
2505  return -1;
2506  }
2507 
2508  for (i = 0; i < 3; i++) {
2509  if (header_len[i] <= 0)
2510  continue;
2511  ret = init_get_bits8(&gb, header_start[i], header_len[i]);
2512  if (ret < 0)
2513  return ret;
2514 
2515  ptype = get_bits(&gb, 8);
2516 
2517  if (!(ptype & 0x80)) {
2518  av_log(avctx, AV_LOG_ERROR, "Invalid extradata!\n");
2519 // return -1;
2520  }
2521 
2522  // FIXME: Check for this as well.
2523  skip_bits_long(&gb, 6 * 8); /* "theora" */
2524 
2525  switch (ptype) {
2526  case 0x80:
2527  if (theora_decode_header(avctx, &gb) < 0)
2528  return -1;
2529  break;
2530  case 0x81:
2531 // FIXME: is this needed? it breaks sometimes
2532 // theora_decode_comments(avctx, gb);
2533  break;
2534  case 0x82:
2535  if (theora_decode_tables(avctx, &gb))
2536  return -1;
2537  break;
2538  default:
2539  av_log(avctx, AV_LOG_ERROR,
2540  "Unknown Theora config packet: %d\n", ptype & ~0x80);
2541  break;
2542  }
2543  if (ptype != 0x81 && 8 * header_len[i] != get_bits_count(&gb))
2544  av_log(avctx, AV_LOG_WARNING,
2545  "%d bits left in packet %X\n",
2546  8 * header_len[i] - get_bits_count(&gb), ptype);
2547  if (s->theora < 0x030200)
2548  break;
2549  }
2550 
2551  return vp3_decode_init(avctx);
2552 }
2553 
2554 AVCodec ff_theora_decoder = {
2555  .name = "theora",
2556  .long_name = NULL_IF_CONFIG_SMALL("Theora"),
2557  .type = AVMEDIA_TYPE_VIDEO,
2558  .id = AV_CODEC_ID_THEORA,
2559  .priv_data_size = sizeof(Vp3DecodeContext),
2560  .init = theora_decode_init,
2561  .close = vp3_decode_end,
2562  .decode = vp3_decode_frame,
2563  .capabilities = AV_CODEC_CAP_DR1 | AV_CODEC_CAP_DRAW_HORIZ_BAND |
2564  AV_CODEC_CAP_FRAME_THREADS,
2565  .flush = vp3_decode_flush,
2566  .init_thread_copy = ONLY_IF_THREADS_ENABLED(vp3_init_thread_copy),
2567  .update_thread_context = ONLY_IF_THREADS_ENABLED(vp3_update_thread_context)
2568 };
2569 #endif
2570 
2571 AVCodec ff_vp3_decoder = {
2572  .name = "vp3",
2573  .long_name = NULL_IF_CONFIG_SMALL("On2 VP3"),
2574  .type = AVMEDIA_TYPE_VIDEO,
2575  .id = AV_CODEC_ID_VP3,
2576  .priv_data_size = sizeof(Vp3DecodeContext),
2577  .init = vp3_decode_init,
2578  .close = vp3_decode_end,
2579  .decode = vp3_decode_frame,
2580  .capabilities = AV_CODEC_CAP_DR1 | AV_CODEC_CAP_DRAW_HORIZ_BAND |
2581  AV_CODEC_CAP_FRAME_THREADS,
2582  .flush = vp3_decode_flush,
2583  .init_thread_copy = ONLY_IF_THREADS_ENABLED(vp3_init_thread_copy),
2584  .update_thread_context = ONLY_IF_THREADS_ENABLED(vp3_update_thread_context),
2585 };
plane
int plane
Definition: avisynth_c.h:422
BLOCK_Y
#define BLOCK_Y
VP3DSPContext::put_no_rnd_pixels_l2
void(* put_no_rnd_pixels_l2)(uint8_t *dst, const uint8_t *a, const uint8_t *b, ptrdiff_t stride, int h)
Copy 8xH pixels from source to destination buffer using a bilinear filter with no rounding (i...
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Definition: avcodec.h:785
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Definition: error.h:59
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Definition: vp3.c:239
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This function sets up all of the various blocks mappings: superblocks <-> fragments, macroblocks <-> fragments, superblocks <-> macroblocks.
Definition: vp3.c:336
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Definition: frame.h:184
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Bitstream width / height, may be different from width/height e.g.
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Definition: get_bits.h:247
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also ITU-R BT601-6 625 / ITU-R BT1358 625 / ITU-R BT1700 625 PAL & SECAM / IEC 61966-2-4 xvYCC601 ...
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Pixel format, see AV_PIX_FMT_xxx.
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Allocate a memory block with alignment suitable for all memory accesses (including vectors if availab...
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Definition: vp3.c:294
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Wait for earlier decoding threads to finish reference pictures.
Definition: pthread_frame.c:489
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int huff_code_size
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#define MAXIMUM_LONG_BIT_RUN
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static const uint16_t ac_bias_3[16][32][2]
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#define COMPATIBLE_FRAME(x)
Definition: vp3.c:1152
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Definition: dct.c:113
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#define av_assert0(cond)
assert() equivalent, that is always enabled.
Definition: avassert.h:37
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Definition: vp3.c:179
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Copy a rectangular area of samples to a temporary buffer and replicate the border samples...
Definition: videodsp.h:63
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int y_superblock_height
Definition: vp3.c:158
TRANSPOSE
#define TRANSPOSE(x)
uint8_t
uint8_t
Definition: audio_convert.c:194
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#define av_cold
Definition: attributes.h:82
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#define av_malloc(s)
Definition: tableprint_vlc.h:31
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static int unpack_vectors(Vp3DecodeContext *s, GetBitContext *gb)
Definition: vp3.c:702
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AVFrame * av_frame_alloc(void)
Allocate an AVFrame and set its fields to default values.
Definition: frame.c:141
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VLC ac_vlc_1[16]
Definition: vp3.c:227
TOKEN_ZERO_RUN
#define TOKEN_ZERO_RUN(coeff, zero_run)
Definition: vp3.c:212
FF_DEBUG_PICT_INFO
#define FF_DEBUG_PICT_INFO
Definition: avcodec.h:2916
vp3_dequant
static int vp3_dequant(Vp3DecodeContext *s, Vp3Fragment *frag, int plane, int inter, int16_t block[64])
Pull DCT tokens from the 64 levels to decode and dequant the coefficients for the next block in codin...
Definition: vp3.c:1373
end
static av_cold int end(AVCodecContext *avctx)
Definition: avrndec.c:90
AV_CODEC_FLAG_UNALIGNED
#define AV_CODEC_FLAG_UNALIGNED
Allow decoders to produce frames with data planes that are not aligned to CPU requirements (e...
Definition: avcodec.h:828
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unsigned int hbits
Definition: vp3.c:255
thread.h
Multithreading support functions.
Vp3DecodeContext::macroblock_width
int macroblock_width
Definition: vp3.c:168
Vp3DecodeContext::idct_permutation
uint8_t idct_permutation[64]
Definition: vp3.c:142
av_frame_ref
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:375
init_dequantizer
static void init_dequantizer(Vp3DecodeContext *s, int qpi)
Definition: vp3.c:370
AVCodecContext::extradata
uint8_t * extradata
some codecs need / can use extradata like Huffman tables.
Definition: avcodec.h:1790
Vp3Fragment::qpi
uint8_t qpi
Definition: vp3.c:55
vp3_decode_flush
static void vp3_decode_flush(AVCodecContext *avctx)
Definition: vp3.c:282
DC_COEFF
#define DC_COEFF(u)
Definition: vp3.c:1154
DECLARE_ALIGNED
#define DECLARE_ALIGNED(n, t, v)
Declare a variable that is aligned in memory.
Definition: mem.h:101
height
#define height
AVPacket::data
uint8_t * data
Definition: avcodec.h:1600
Vp3DecodeContext::filter_limit_values
uint8_t filter_limit_values[64]
Definition: vp3.c:260
get_bits_count
static int get_bits_count(const GetBitContext *s)
Definition: get_bits.h:199
ff_thread_ref_frame
int ff_thread_ref_frame(ThreadFrame *dst, ThreadFrame *src)
Definition: utils.c:3881
ff_set_sar
int ff_set_sar(AVCodecContext *avctx, AVRational sar)
Check that the provided sample aspect ratio is valid and set it on the codec context.
Definition: utils.c:225
ff_dlog
#define ff_dlog(a,...)
Definition: tableprint_vlc.h:29
get_bits.h
bitstream reader API header.
Vp3DecodeContext::ac_vlc_2
VLC ac_vlc_2[16]
Definition: vp3.c:228
av_reduce
int av_reduce(int *dst_num, int *dst_den, int64_t num, int64_t den, int64_t max)
Reduce a fraction.
Definition: rational.c:35
ff_thread_finish_setup
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...
Definition: pthread_frame.c:507
AV_CODEC_FLAG_GRAY
#define AV_CODEC_FLAG_GRAY
Only decode/encode grayscale.
Definition: avcodec.h:860
mode_code_vlc_table
static const uint8_t mode_code_vlc_table[8][2]
Definition: vp3data.h:144
AVCodecContext::chroma_sample_location
enum AVChromaLocation chroma_sample_location
This defines the location of chroma samples.
Definition: avcodec.h:2419
FFALIGN
#define FFALIGN(x, a)
Definition: macros.h:48
MODE_INTRA
#define MODE_INTRA
Definition: vp3.c:68
av_log
#define av_log(a,...)
Definition: tableprint_vlc.h:28
unpack_dct_coeffs
static int unpack_dct_coeffs(Vp3DecodeContext *s, GetBitContext *gb)
Definition: vp3.c:1061
ac_bias_1
static const uint16_t ac_bias_1[16][32][2]
Definition: vp3data.h:1540
Vp3DecodeContext::height
int height
Definition: vp3.c:136
U
#define U(x)
Definition: vp56_arith.h:37
ref_frames
static int ref_frames(Vp3DecodeContext *dst, Vp3DecodeContext *src)
Definition: vp3.c:1923
get_bits_left
static int get_bits_left(GetBitContext *gb)
Definition: get_bits.h:568
vp3_decode_frame
static int vp3_decode_frame(AVCodecContext *avctx, void *data, int *got_frame, AVPacket *avpkt)
Definition: vp3.c:1995
motion_vector_vlc_table
static const uint8_t motion_vector_vlc_table[63][2]
Definition: vp3data.h:151
AVCOL_PRI_BT470M
also FCC Title 47 Code of Federal Regulations 73.682 (a)(20)
Definition: pixfmt.h:396
AV_LOG_ERROR
#define AV_LOG_ERROR
Something went wrong and cannot losslessly be recovered.
Definition: log.h:176
AV_CODEC_FLAG2_IGNORE_CROP
#define AV_CODEC_FLAG2_IGNORE_CROP
Discard cropping information from SPS.
Definition: avcodec.h:923
output_plane
static void output_plane(const Plane *plane, int buf_sel, uint8_t *dst, int dst_pitch, int dst_height)
Convert and output the current plane.
Definition: indeo3.c:1027
Vp3DecodeContext::vp3dsp
VP3DSPContext vp3dsp
Definition: vp3.c:146
ff_thread_release_buffer
void ff_thread_release_buffer(AVCodecContext *avctx, ThreadFrame *f)
Wrapper around release_buffer() frame-for multithreaded codecs.
Definition: pthread_frame.c:849
Vp3DecodeContext::c_superblock_width
int c_superblock_width
Definition: vp3.c:160
Vp3DecodeContext::qr_count
uint8_t qr_count[2][3]
Definition: vp3.c:188
Vp3DecodeContext::fragment_height
int fragment_height[2]
Definition: vp3.c:173
init_vlc
#define init_vlc(vlc, nb_bits, nb_codes,bits, bits_wrap, bits_size,codes, codes_wrap, codes_size,flags)
Definition: vlc.h:38
AVCodecInternal::is_copy
int is_copy
Whether the parent AVCodecContext is a copy of the context which had init() called on it...
Definition: internal.h:111
AVERROR
#define AVERROR(e)
Definition: error.h:43
Vp3DecodeContext::ac_vlc_3
VLC ac_vlc_3[16]
Definition: vp3.c:229
AV_CODEC_ID_VP3
Definition: avcodec.h:226
av_frame_free
void av_frame_free(AVFrame **frame)
Free the frame and any dynamically allocated objects in it, e.g.
Definition: frame.c:154
CODING_MODE_COUNT
#define CODING_MODE_COUNT
Definition: vp3.c:75
table
static const struct endianess table[]
NULL_IF_CONFIG_SMALL
#define NULL_IF_CONFIG_SMALL(x)
Return NULL if CONFIG_SMALL is true, otherwise the argument without modification. ...
Definition: internal.h:176
AVCodecContext::active_thread_type
int active_thread_type
Which multithreading methods are in use by the codec.
Definition: avcodec.h:3125
fixed_motion_vector_table
static const int8_t fixed_motion_vector_table[64]
Definition: vp3data.h:189
AV_LOG_DEBUG
#define AV_LOG_DEBUG
Stuff which is only useful for libav* developers.
Definition: log.h:197
AVCodecContext::flags
int flags
AV_CODEC_FLAG_*.
Definition: avcodec.h:1770
Vp3DecodeContext::theora
int theora
Definition: vp3.c:134
free_tables
static av_cold void free_tables(AVCodecContext *avctx)
Definition: vp3.c:268
AVCodec::name
const char * name
Name of the codec implementation.
Definition: avcodec.h:3606
Vp3DecodeContext::theora_header
int theora_header
Definition: vp3.c:134
offset
static const uint8_t offset[127][2]
Definition: vf_spp.c:92
FFMAX
#define FFMAX(a, b)
Definition: common.h:94
av_mallocz_array
static void * av_mallocz_array(size_t nmemb, size_t size)
Definition: mem.h:226
Vp3DecodeContext::qps
int qps[3]
Definition: vp3.c:152
fail
#define fail()
Definition: checkasm.h:82
ModeAlphabet
static const int ModeAlphabet[6][CODING_MODE_COUNT]
Definition: vp3.c:85
AV_CODEC_CAP_FRAME_THREADS
#define AV_CODEC_CAP_FRAME_THREADS
Codec supports frame-level multithreading.
Definition: avcodec.h:1021
VLC
Definition: vlc.h:26
AV_PIX_FMT_YUV422P
planar YUV 4:2:2, 16bpp, (1 Cr & Cb sample per 2x1 Y samples)
Definition: pixfmt.h:66
ONLY_IF_THREADS_ENABLED
#define ONLY_IF_THREADS_ENABLED(x)
Define a function with only the non-default version specified.
Definition: internal.h:215
ff_hpeldsp_init
av_cold void ff_hpeldsp_init(HpelDSPContext *c, int flags)
Definition: hpeldsp.c:338
coeff_tables
static const int16_t *const coeff_tables[32]
Definition: vp3data.h:408
Vp3DecodeContext::chroma_y_shift
int chroma_y_shift
Definition: vp3.c:137
Vp3DecodeContext::flipped_image
int flipped_image
Definition: vp3.c:148
Vp3DecodeContext::macroblock_coding
unsigned char * macroblock_coding
Definition: vp3.c:249
av_image_check_size
int av_image_check_size(unsigned int w, unsigned int h, int log_offset, void *log_ctx)
Check if the given dimension of an image is valid, meaning that all bytes of the image can be address...
Definition: imgutils.c:251
eob_run_get_bits
static const uint8_t eob_run_get_bits[7]
Definition: vp3data.h:204
HpelDSPContext
Half-pel DSP context.
Definition: hpeldsp.h:45
Vp3DecodeContext::fragment_width
int fragment_width[2]
Definition: vp3.c:172
AV_CODEC_CAP_DRAW_HORIZ_BAND
#define AV_CODEC_CAP_DRAW_HORIZ_BAND
Decoder can use draw_horiz_band callback.
Definition: avcodec.h:952
AVCodecContext::draw_horiz_band
void(* draw_horiz_band)(struct AVCodecContext *s, const AVFrame *src, int offset[AV_NUM_DATA_POINTERS], int y, int type, int height)
If non NULL, 'draw_horiz_band' is called by the libavcodec decoder to draw a horizontal band...
Definition: avcodec.h:1936
SET_CHROMA_MODES
#define SET_CHROMA_MODES
AV_PICTURE_TYPE_I
Intra.
Definition: avutil.h:268
AVFrame::pict_type
enum AVPictureType pict_type
Picture type of the frame.
Definition: frame.h:258
AV_CODEC_FLAG_BITEXACT
#define AV_CODEC_FLAG_BITEXACT
Use only bitexact stuff (except (I)DCT).
Definition: avcodec.h:885
FF_THREAD_FRAME
#define FF_THREAD_FRAME
Decode more than one frame at once.
Definition: avcodec.h:3117
FFMIN
#define FFMIN(a, b)
Definition: common.h:96
Vp3DecodeContext::fragment_run_length_vlc
VLC fragment_run_length_vlc
Definition: vp3.c:233
PU
#define PU
width
#define width
Vp3DecodeContext::macroblock_height
int macroblock_height
Definition: vp3.c:169
AVCodecContext::width
int width
picture width / height.
Definition: avcodec.h:1862
value
GLsizei GLboolean const GLfloat * value
Definition: opengl_enc.c:109
SB_PARTIALLY_CODED
#define SB_PARTIALLY_CODED
Definition: vp3.c:59
unpack_vlcs
static int unpack_vlcs(Vp3DecodeContext *s, GetBitContext *gb, VLC *table, int coeff_index, int plane, int eob_run)
Definition: vp3.c:934
AVCOL_PRI_BT470BG
also ITU-R BT601-6 625 / ITU-R BT1358 625 / ITU-R BT1700 625 PAL & SECAM
Definition: pixfmt.h:398
ff_thread_report_progress
void ff_thread_report_progress(ThreadFrame *f, int n, int field)
Notify later decoding threads when part of their reference picture is ready.
Definition: pthread_frame.c:471
Vp3DecodeContext::edge_emu_buffer
uint8_t * edge_emu_buffer
Definition: vp3.c:251
VP3DSPContext::idct_add
void(* idct_add)(uint8_t *dest, int line_size, int16_t *block)
Definition: vp3dsp.h:42
AVCodecContext::color_primaries
enum AVColorPrimaries color_primaries
Chromaticity coordinates of the source primaries.
Definition: avcodec.h:2391
perm
perm
Definition: f_perms.c:74
motion_vector_table
static const int8_t motion_vector_table[63]
Definition: vp3data.h:179
MODE_COPY
#define MODE_COPY
Definition: vp3.c:78
FFABS
#define FFABS(a)
Absolute value, Note, INT_MIN / INT64_MIN result in undefined behavior as they are not representable ...
Definition: common.h:72
avpriv_split_xiph_headers
int avpriv_split_xiph_headers(const uint8_t *extradata, int extradata_size, int first_header_size, const uint8_t *header_start[3], int header_len[3])
Split a single extradata buffer into the three headers that most Xiph codecs use. ...
Definition: xiph.c:24
get_vlc2
static av_always_inline int get_vlc2(GetBitContext *s, VLC_TYPE(*table)[2], int bits, int max_depth)
Parse a vlc code.
Definition: get_bits.h:535
ac_bias_2
static const uint16_t ac_bias_2[16][32][2]
Definition: vp3data.h:2087
n
int n
Definition: avisynth_c.h:684
hilbert_offset
static const uint8_t hilbert_offset[16][2]
Definition: vp3.c:123
Vp3DecodeContext::macroblock_count
int macroblock_count
Definition: vp3.c:167
src
#define src
Definition: vp9dsp.c:530
avcodec_get_chroma_sub_sample
void avcodec_get_chroma_sub_sample(enum AVPixelFormat pix_fmt, int *h_shift, int *v_shift)
Utility function to access log2_chroma_w log2_chroma_h from the pixel format AVPixFmtDescriptor.
Definition: imgconvert.c:38
Vp3DecodeContext::c_superblock_height
int c_superblock_height
Definition: vp3.c:161
Vp3DecodeContext::offset_x_warned
int offset_x_warned
Definition: vp3.c:180
Vp3DecodeContext::total_num_coded_frags
int total_num_coded_frags
Definition: vp3.c:220
Vp3DecodeContext::c_superblock_count
int c_superblock_count
Definition: vp3.c:162
ff_vp3_decoder
AVCodec ff_vp3_decoder
Definition: vp3.c:2571
AVERROR_PATCHWELCOME
#define AVERROR_PATCHWELCOME
Not yet implemented in FFmpeg, patches welcome.
Definition: error.h:62
apply_loop_filter
static void apply_loop_filter(Vp3DecodeContext *s, int plane, int ystart, int yend)
Definition: vp3.c:1306
transform
static const int8_t transform[32][32]
Definition: hevcdsp.c:27
AVCOL_TRC_BT709
also ITU-R BT1361
Definition: pixfmt.h:414
hpeldsp.h
Half-pel DSP functions.
AV_LOG_INFO
#define AV_LOG_INFO
Standard information.
Definition: log.h:187
Vp3DecodeContext::superblock_count
int superblock_count
Definition: vp3.c:156
AV_CODEC_ID_THEORA
Definition: avcodec.h:227
avcodec.h
Libavcodec external API header.
Vp3DecodeContext::entries
int entries
Definition: vp3.c:256
ac_bias_0
static const uint16_t ac_bias_0[16][32][2]
Definition: vp3data.h:993
AVCodecContext::codec_id
enum AVCodecID codec_id
Definition: avcodec.h:1692
AVFrame::linesize
int linesize[AV_NUM_DATA_POINTERS]
For video, size in bytes of each picture line.
Definition: frame.h:215
Vp3DecodeContext::dct_tokens
int16_t * dct_tokens[3][64]
This is a list of all tokens in bitstream order.
Definition: vp3.c:209
init_get_bits8
static int init_get_bits8(GetBitContext *s, const uint8_t *buffer, int byte_size)
Initialize GetBitContext.
Definition: get_bits.h:437
Vp3DecodeContext::skip_loop_filter
int skip_loop_filter
Definition: vp3.c:150
AVCodecContext::debug
int debug
debug
Definition: avcodec.h:2915
ff_thread_get_buffer
int ff_thread_get_buffer(AVCodecContext *avctx, ThreadFrame *f, int flags)
Wrapper around get_buffer() for frame-multithreaded codecs.
Definition: pthread_frame.c:841
Vp3DecodeContext::current_frame
ThreadFrame current_frame
Definition: vp3.c:140
AVCodecContext
main external API structure.
Definition: avcodec.h:1675
RSHIFT
#define RSHIFT(a, b)
Definition: common.h:54
Vp3DecodeContext::last_qps
int last_qps[3]
Definition: vp3.c:154
AVCodecContext::codec_tag
unsigned int codec_tag
fourcc (LSB first, so "ABCD" -> ('D'<<24) + ('C'<<16) + ('B'<<8) + 'A').
Definition: avcodec.h:1707
Vp3DecodeContext::qr_size
uint8_t qr_size[2][3][64]
Definition: vp3.c:189
HpelDSPContext::put_pixels_tab
op_pixels_func put_pixels_tab[4][4]
Halfpel motion compensation with rounding (a+b+1)>>1.
Definition: hpeldsp.h:56
PUL
#define PUL
allocate_tables
static av_cold int allocate_tables(AVCodecContext *avctx)
Allocate tables for per-frame data in Vp3DecodeContext.
Definition: vp3.c:1663
Vp3DecodeContext::data_offset
int data_offset[3]
Definition: vp3.c:177
buf
void * buf
Definition: avisynth_c.h:690
type
GLint GLenum type
Definition: opengl_enc.c:105
AVCodecContext::extradata_size
int extradata_size
Definition: avcodec.h:1791
get_bits1
static unsigned int get_bits1(GetBitContext *s)
Definition: get_bits.h:299
AVCodecContext::coded_height
int coded_height
Definition: avcodec.h:1877
HpelDSPContext::put_no_rnd_pixels_tab
op_pixels_func put_no_rnd_pixels_tab[4][4]
Halfpel motion compensation with no rounding (a+b)>>1.
Definition: hpeldsp.h:80
skip_bits
static void skip_bits(GetBitContext *s, int n)
Definition: get_bits.h:292
SB_FULLY_CODED
#define SB_FULLY_CODED
Definition: vp3.c:60
AVCodecContext::colorspace
enum AVColorSpace colorspace
YUV colorspace type.
Definition: avcodec.h:2405
AVRational
Rational number (pair of numerator and denominator).
Definition: rational.h:58
AVCodecContext::color_trc
enum AVColorTransferCharacteristic color_trc
Color Transfer Characteristic.
Definition: avcodec.h:2398
ff_zigzag_direct
const uint8_t ff_zigzag_direct[64]
Definition: mathtables.c:98
Vp3DecodeContext::num_coded_frags
int num_coded_frags[3][64]
number of blocks that contain DCT coefficients at the given level or higher
Definition: vp3.c:219
Vp3DecodeContext::keyframe
int keyframe
Definition: vp3.c:141
TOKEN_COEFF
#define TOKEN_COEFF(coeff)
Definition: vp3.c:213
s1
#define s1
Definition: regdef.h:38
u
#define u(width,...)
Definition: vaapi_encode_h26x.h:36
MODE_GOLDEN_MV
#define MODE_GOLDEN_MV
Definition: vp3.c:73
vp31_dc_scale_factor
static const uint8_t vp31_dc_scale_factor[64]
Definition: vp3data.h:65
AVCodecInternal::allocate_progress
int allocate_progress
Whether to allocate progress for frame threading.
Definition: internal.h:126
get_bits_long
static unsigned int get_bits_long(GetBitContext *s, int n)
Read 0-32 bits.
Definition: get_bits.h:332
FRAGMENT_PIXELS
#define FRAGMENT_PIXELS
Definition: vp3.c:49
read_huffman_tree
static int read_huffman_tree(AVCodecContext *avctx, GetBitContext *gb)
Definition: vp3.c:2195
update_frames
static int update_frames(AVCodecContext *avctx)
Release and shuffle frames after decode finishes.
Definition: vp3.c:1894
superblock_run_length_vlc_table
static const uint16_t superblock_run_length_vlc_table[34][2]
Definition: vp3data.h:98
MODE_USING_GOLDEN
#define MODE_USING_GOLDEN
Definition: vp3.c:72
Vp3DecodeContext::huffman_table
uint32_t huffman_table[80][32][2]
Definition: vp3.c:258
av_frame_unref
void av_frame_unref(AVFrame *frame)
Unreference all the buffers referenced by frame and reset the frame fields.
Definition: frame.c:485
MODE_INTER_FOURMV
#define MODE_INTER_FOURMV
Definition: vp3.c:74
Vp3DecodeContext::block
int16_t block[64]
Definition: vp3.c:147
AVFrame::data
uint8_t * data[AV_NUM_DATA_POINTERS]
pointer to the picture/channel planes.
Definition: frame.h:198
Vp3DecodeContext::v_superblock_start
int v_superblock_start
Definition: vp3.c:164
Vp3DecodeContext::version
int version
Definition: vp3.c:135
decode
static int decode(AVCodecContext *avctx, void *data, int *got_sub, AVPacket *avpkt)
Definition: ccaption_dec.c:750
Vp3DecodeContext::coded_fragment_list
int * coded_fragment_list[3]
Definition: vp3.c:224
stride
GLint GLenum GLboolean GLsizei stride
Definition: opengl_enc.c:105
AV_PIX_FMT_YUV420P
planar YUV 4:2:0, 12bpp, (1 Cr & Cb sample per 2x2 Y samples)
Definition: pixfmt.h:62
Vp3DecodeContext::superblock_coding
unsigned char * superblock_coding
Definition: vp3.c:165
internal.h
common internal api header.
Vp3DecodeContext::last_frame
ThreadFrame last_frame
Definition: vp3.c:139
if
if(ret< 0)
Definition: vf_mcdeint.c:282
VP3DSPContext::v_loop_filter
void(* v_loop_filter)(uint8_t *src, int stride, int *bounding_values)
Definition: vp3dsp.h:44
Vp3DecodeContext::dct_tokens_base
int16_t * dct_tokens_base
Definition: vp3.c:210
ref_frame
static int ref_frame(Vp3DecodeContext *s, ThreadFrame *dst, ThreadFrame *src)
Definition: vp3.c:1915
Vp3DecodeContext::avctx
AVCodecContext * avctx
Definition: vp3.c:133
vp31_inter_dequant
static const int8_t vp31_inter_dequant[64]
Definition: vp3data.h:54
Vp3DecodeContext::vdsp
VideoDSPContext vdsp
Definition: vp3.c:145
Vp3DecodeContext::coded_dc_scale_factor
uint16_t coded_dc_scale_factor[64]
Definition: vp3.c:185
AVRational::den
int den
Denominator.
Definition: rational.h:60
videodsp.h
Core video DSP helper functions.
Vp3DecodeContext::base_matrix
uint8_t base_matrix[384][64]
Definition: vp3.c:187
Vp3DecodeContext::fragment_count
int fragment_count
Definition: vp3.c:171
AVCodecContext::priv_data
void * priv_data
Definition: avcodec.h:1717
unpack_block_qpis
static int unpack_block_qpis(Vp3DecodeContext *s, GetBitContext *gb)
Definition: vp3.c:880
await_reference_row
static void await_reference_row(Vp3DecodeContext *s, Vp3Fragment *fragment, int motion_y, int y)
Wait for the reference frame of the current fragment.
Definition: vp3.c:1460
AVCodecContext::internal
struct AVCodecInternal * internal
Private context used for internal data.
Definition: avcodec.h:1725
VLC::table
VLC_TYPE(* table)[2]
code, bits
Definition: vlc.h:28
AVFrame::key_frame
int key_frame
1 -> keyframe, 0-> not
Definition: frame.h:253
coeff
static const double coeff[2][5]
Definition: vf_owdenoise.c:72
AVCodecContext::flags2
int flags2
AV_CODEC_FLAG2_*.
Definition: avcodec.h:1777
MODE_INTER_PRIOR_LAST
#define MODE_INTER_PRIOR_LAST
Definition: vp3.c:71
MODE_INTER_NO_MV
#define MODE_INTER_NO_MV
Definition: vp3.c:67
Vp3DecodeContext::fragment_start
int fragment_start[3]
Definition: vp3.c:176
Vp3DecodeContext::theora_tables
int theora_tables
Definition: vp3.c:134
av_freep
#define av_freep(p)
Definition: tableprint_vlc.h:35
AVMEDIA_TYPE_VIDEO
Definition: avutil.h:195
AV_LOG_FATAL
#define AV_LOG_FATAL
Something went wrong and recovery is not possible.
Definition: log.h:170
AVCHROMA_LOC_CENTER
MPEG-1 4:2:0, JPEG 4:2:0, H.263 4:2:0.
Definition: pixfmt.h:484
VLC_TYPE
#define VLC_TYPE
Definition: vlc.h:24
MODE_INTER_LAST_MV
#define MODE_INTER_LAST_MV
Definition: vp3.c:70
Vp3DecodeContext::golden_frame
ThreadFrame golden_frame
Definition: vp3.c:138
Vp3DecodeContext::chroma_x_shift
int chroma_x_shift
Definition: vp3.c:137
stride
#define stride
ff_vp3dsp_init
av_cold void ff_vp3dsp_init(VP3DSPContext *c, int flags)
Definition: vp3dsp.c:280
vp31_filter_limit_values
static const uint8_t vp31_filter_limit_values[64]
Definition: vp3data.h:87
MKTAG
#define MKTAG(a, b, c, d)
Definition: common.h:342
AVPixelFormat
AVPixelFormat
Pixel format.
Definition: pixfmt.h:60
AVPacket
This structure stores compressed data.
Definition: avcodec.h:1577
vp3_draw_horiz_band
static void vp3_draw_horiz_band(Vp3DecodeContext *s, int y)
called when all pixels up to row y are complete
Definition: vp3.c:1418
ff_free_vlc
void ff_free_vlc(VLC *vlc)
Definition: bitstream.c:360
AV_GET_BUFFER_FLAG_REF
#define AV_GET_BUFFER_FLAG_REF
The decoder will keep a reference to the frame and may reuse it later.
Definition: avcodec.h:1353
Vp3Fragment::dc
int16_t dc
Definition: vp3.c:53
AV_CODEC_CAP_DR1
#define AV_CODEC_CAP_DR1
Codec uses get_buffer() for allocating buffers and supports custom allocators.
Definition: avcodec.h:958
Vp3DecodeContext::offset_x
uint8_t offset_x
Definition: vp3.c:178
Vp3DecodeContext::coded_ac_scale_factor
uint32_t coded_ac_scale_factor[64]
Definition: vp3.c:186
zero_run_get_bits
static const uint8_t zero_run_get_bits[32]
Definition: vp3data.h:215
AV_PICTURE_TYPE_P
Predicted.
Definition: avutil.h:269
Vp3DecodeContext::dc_vlc
VLC dc_vlc[16]
Definition: vp3.c:226
PL
#define PL
Vp3DecodeContext::motion_val
int8_t(*[2] motion_val)[2]
Definition: vp3.c:182
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