2 * Copyright (C) 2003-2004 The FFmpeg project
3 * Copyright (C) 2019 Peter Ross
5 * This file is part of FFmpeg.
7 * FFmpeg is free software; you can redistribute it and/or
8 * modify it under the terms of the GNU Lesser General Public
9 * License as published by the Free Software Foundation; either
10 * version 2.1 of the License, or (at your option) any later version.
12 * FFmpeg is distributed in the hope that it will be useful,
13 * but WITHOUT ANY WARRANTY; without even the implied warranty of
14 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
15 * Lesser General Public License for more details.
17 * You should have received a copy of the GNU Lesser General Public
18 * License along with FFmpeg; if not, write to the Free Software
19 * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA
24 * On2 VP3/VP4 Video Decoder
26 * VP3 Video Decoder by Mike Melanson (mike at multimedia.cx)
27 * For more information about the VP3 coding process, visit:
28 * http://wiki.multimedia.cx/index.php?title=On2_VP3
30 * Theora decoder by Alex Beregszaszi
37 #include "libavutil/imgutils.h"
51 #define FRAGMENT_PIXELS 8
53 // FIXME split things out into their own arrays
54 typedef struct Vp3Fragment {
56 uint8_t coding_method;
60 #define SB_NOT_CODED 0
61 #define SB_PARTIALLY_CODED 1
62 #define SB_FULLY_CODED 2
64 // This is the maximum length of a single long bit run that can be encoded
65 // for superblock coding or block qps. Theora special-cases this to read a
66 // bit instead of flipping the current bit to allow for runs longer than 4129.
67 #define MAXIMUM_LONG_BIT_RUN 4129
69 #define MODE_INTER_NO_MV 0
71 #define MODE_INTER_PLUS_MV 2
72 #define MODE_INTER_LAST_MV 3
73 #define MODE_INTER_PRIOR_LAST 4
74 #define MODE_USING_GOLDEN 5
75 #define MODE_GOLDEN_MV 6
76 #define MODE_INTER_FOURMV 7
77 #define CODING_MODE_COUNT 8
79 /* special internal mode */
82 static int theora_decode_header(AVCodecContext *avctx, GetBitContext *gb);
83 static int theora_decode_tables(AVCodecContext *avctx, GetBitContext *gb);
86 /* There are 6 preset schemes, plus a free-form scheme */
87 static const int ModeAlphabet[6][CODING_MODE_COUNT] = {
88 /* scheme 1: Last motion vector dominates */
89 { MODE_INTER_LAST_MV, MODE_INTER_PRIOR_LAST,
90 MODE_INTER_PLUS_MV, MODE_INTER_NO_MV,
91 MODE_INTRA, MODE_USING_GOLDEN,
92 MODE_GOLDEN_MV, MODE_INTER_FOURMV },
95 { MODE_INTER_LAST_MV, MODE_INTER_PRIOR_LAST,
96 MODE_INTER_NO_MV, MODE_INTER_PLUS_MV,
97 MODE_INTRA, MODE_USING_GOLDEN,
98 MODE_GOLDEN_MV, MODE_INTER_FOURMV },
101 { MODE_INTER_LAST_MV, MODE_INTER_PLUS_MV,
102 MODE_INTER_PRIOR_LAST, MODE_INTER_NO_MV,
103 MODE_INTRA, MODE_USING_GOLDEN,
104 MODE_GOLDEN_MV, MODE_INTER_FOURMV },
107 { MODE_INTER_LAST_MV, MODE_INTER_PLUS_MV,
108 MODE_INTER_NO_MV, MODE_INTER_PRIOR_LAST,
109 MODE_INTRA, MODE_USING_GOLDEN,
110 MODE_GOLDEN_MV, MODE_INTER_FOURMV },
112 /* scheme 5: No motion vector dominates */
113 { MODE_INTER_NO_MV, MODE_INTER_LAST_MV,
114 MODE_INTER_PRIOR_LAST, MODE_INTER_PLUS_MV,
115 MODE_INTRA, MODE_USING_GOLDEN,
116 MODE_GOLDEN_MV, MODE_INTER_FOURMV },
119 { MODE_INTER_NO_MV, MODE_USING_GOLDEN,
120 MODE_INTER_LAST_MV, MODE_INTER_PRIOR_LAST,
121 MODE_INTER_PLUS_MV, MODE_INTRA,
122 MODE_GOLDEN_MV, MODE_INTER_FOURMV },
125 static const uint8_t hilbert_offset[16][2] = {
126 { 0, 0 }, { 1, 0 }, { 1, 1 }, { 0, 1 },
127 { 0, 2 }, { 0, 3 }, { 1, 3 }, { 1, 2 },
128 { 2, 2 }, { 2, 3 }, { 3, 3 }, { 3, 2 },
129 { 3, 1 }, { 2, 1 }, { 2, 0 }, { 3, 0 }
137 VP4_DC_UNDEFINED = NB_VP4_DC_TYPES
140 static const uint8_t vp4_pred_block_type_map[8] = {
141 [MODE_INTER_NO_MV] = VP4_DC_INTER,
142 [MODE_INTRA] = VP4_DC_INTRA,
143 [MODE_INTER_PLUS_MV] = VP4_DC_INTER,
144 [MODE_INTER_LAST_MV] = VP4_DC_INTER,
145 [MODE_INTER_PRIOR_LAST] = VP4_DC_INTER,
146 [MODE_USING_GOLDEN] = VP4_DC_GOLDEN,
147 [MODE_GOLDEN_MV] = VP4_DC_GOLDEN,
148 [MODE_INTER_FOURMV] = VP4_DC_INTER,
156 #define MIN_DEQUANT_VAL 2
158 typedef struct Vp3DecodeContext {
159 AVCodecContext *avctx;
160 int theora, theora_tables, theora_header;
163 int chroma_x_shift, chroma_y_shift;
164 ThreadFrame golden_frame;
165 ThreadFrame last_frame;
166 ThreadFrame current_frame;
168 uint8_t idct_permutation[64];
169 uint8_t idct_scantable[64];
171 VideoDSPContext vdsp;
172 VP3DSPContext vp3dsp;
173 DECLARE_ALIGNED(16, int16_t, block)[64];
176 int skip_loop_filter;
182 int superblock_count;
183 int y_superblock_width;
184 int y_superblock_height;
185 int y_superblock_count;
186 int c_superblock_width;
187 int c_superblock_height;
188 int c_superblock_count;
189 int u_superblock_start;
190 int v_superblock_start;
191 unsigned char *superblock_coding;
193 int macroblock_count; /* y macroblock count */
194 int macroblock_width;
195 int macroblock_height;
196 int c_macroblock_count;
197 int c_macroblock_width;
198 int c_macroblock_height;
199 int yuv_macroblock_count; /* y+u+v macroblock count */
202 int fragment_width[2];
203 int fragment_height[2];
205 Vp3Fragment *all_fragments;
206 int fragment_start[3];
212 int8_t (*motion_val[2])[2];
215 uint16_t coded_dc_scale_factor[2][64];
216 uint32_t coded_ac_scale_factor[64];
217 uint8_t base_matrix[384][64];
218 uint8_t qr_count[2][3];
219 uint8_t qr_size[2][3][64];
220 uint16_t qr_base[2][3][64];
223 * This is a list of all tokens in bitstream order. Reordering takes place
224 * by pulling from each level during IDCT. As a consequence, IDCT must be
225 * in Hilbert order, making the minimum slice height 64 for 4:2:0 and 32
226 * otherwise. The 32 different tokens with up to 12 bits of extradata are
227 * collapsed into 3 types, packed as follows:
228 * (from the low to high bits)
230 * 2 bits: type (0,1,2)
231 * 0: EOB run, 14 bits for run length (12 needed)
232 * 1: zero run, 7 bits for run length
233 * 7 bits for the next coefficient (3 needed)
234 * 2: coefficient, 14 bits (11 needed)
236 * Coefficients are signed, so are packed in the highest bits for automatic
239 int16_t *dct_tokens[3][64];
240 int16_t *dct_tokens_base;
241 #define TOKEN_EOB(eob_run) ((eob_run) << 2)
242 #define TOKEN_ZERO_RUN(coeff, zero_run) (((coeff) * 512) + ((zero_run) << 2) + 1)
243 #define TOKEN_COEFF(coeff) (((coeff) * 4) + 2)
246 * number of blocks that contain DCT coefficients at
247 * the given level or higher
249 int num_coded_frags[3][64];
250 int total_num_coded_frags;
252 /* this is a list of indexes into the all_fragments array indicating
253 * which of the fragments are coded */
254 int *coded_fragment_list[3];
256 int *kf_coded_fragment_list;
257 int *nkf_coded_fragment_list;
258 int num_kf_coded_fragment[3];
266 VLC superblock_run_length_vlc; /* version < 2 */
267 VLC fragment_run_length_vlc; /* version < 2 */
268 VLC block_pattern_vlc[2]; /* version >= 2*/
270 VLC motion_vector_vlc; /* version < 2 */
271 VLC vp4_mv_vlc[2][7]; /* version >=2 */
273 /* these arrays need to be on 16-byte boundaries since SSE2 operations
275 DECLARE_ALIGNED(16, int16_t, qmat)[3][2][3][64]; ///< qmat[qpi][is_inter][plane]
277 /* This table contains superblock_count * 16 entries. Each set of 16
278 * numbers corresponds to the fragment indexes 0..15 of the superblock.
279 * An entry will be -1 to indicate that no entry corresponds to that
281 int *superblock_fragments;
283 /* This is an array that indicates how a particular macroblock
285 unsigned char *macroblock_coding;
287 uint8_t *edge_emu_buffer;
294 uint32_t huffman_table[80][32][2];
296 uint8_t filter_limit_values[64];
297 DECLARE_ALIGNED(8, int, bounding_values_array)[256 + 2];
299 VP4Predictor * dc_pred_row; /* dc_pred_row[y_superblock_width * 4] */
302 /************************************************************************
303 * VP3 specific functions
304 ************************************************************************/
306 static av_cold void free_tables(AVCodecContext *avctx)
308 Vp3DecodeContext *s = avctx->priv_data;
310 av_freep(&s->superblock_coding);
311 av_freep(&s->all_fragments);
312 av_freep(&s->nkf_coded_fragment_list);
313 av_freep(&s->kf_coded_fragment_list);
314 av_freep(&s->dct_tokens_base);
315 av_freep(&s->superblock_fragments);
316 av_freep(&s->macroblock_coding);
317 av_freep(&s->dc_pred_row);
318 av_freep(&s->motion_val[0]);
319 av_freep(&s->motion_val[1]);
322 static void vp3_decode_flush(AVCodecContext *avctx)
324 Vp3DecodeContext *s = avctx->priv_data;
326 if (s->golden_frame.f)
327 ff_thread_release_buffer(avctx, &s->golden_frame);
329 ff_thread_release_buffer(avctx, &s->last_frame);
330 if (s->current_frame.f)
331 ff_thread_release_buffer(avctx, &s->current_frame);
334 static av_cold int vp3_decode_end(AVCodecContext *avctx)
336 Vp3DecodeContext *s = avctx->priv_data;
340 av_freep(&s->edge_emu_buffer);
342 s->theora_tables = 0;
344 /* release all frames */
345 vp3_decode_flush(avctx);
346 av_frame_free(&s->current_frame.f);
347 av_frame_free(&s->last_frame.f);
348 av_frame_free(&s->golden_frame.f);
350 for (i = 0; i < 16; i++) {
351 ff_free_vlc(&s->dc_vlc[i]);
352 ff_free_vlc(&s->ac_vlc_1[i]);
353 ff_free_vlc(&s->ac_vlc_2[i]);
354 ff_free_vlc(&s->ac_vlc_3[i]);
355 ff_free_vlc(&s->ac_vlc_4[i]);
358 ff_free_vlc(&s->superblock_run_length_vlc);
359 ff_free_vlc(&s->fragment_run_length_vlc);
360 ff_free_vlc(&s->mode_code_vlc);
361 ff_free_vlc(&s->motion_vector_vlc);
363 for (j = 0; j < 2; j++)
364 for (i = 0; i < 7; i++)
365 ff_free_vlc(&s->vp4_mv_vlc[j][i]);
367 for (i = 0; i < 2; i++)
368 ff_free_vlc(&s->block_pattern_vlc[i]);
373 * This function sets up all of the various blocks mappings:
374 * superblocks <-> fragments, macroblocks <-> fragments,
375 * superblocks <-> macroblocks
377 * @return 0 is successful; returns 1 if *anything* went wrong.
379 static int init_block_mapping(Vp3DecodeContext *s)
381 int sb_x, sb_y, plane;
384 for (plane = 0; plane < 3; plane++) {
385 int sb_width = plane ? s->c_superblock_width
386 : s->y_superblock_width;
387 int sb_height = plane ? s->c_superblock_height
388 : s->y_superblock_height;
389 int frag_width = s->fragment_width[!!plane];
390 int frag_height = s->fragment_height[!!plane];
392 for (sb_y = 0; sb_y < sb_height; sb_y++)
393 for (sb_x = 0; sb_x < sb_width; sb_x++)
394 for (i = 0; i < 16; i++) {
395 x = 4 * sb_x + hilbert_offset[i][0];
396 y = 4 * sb_y + hilbert_offset[i][1];
398 if (x < frag_width && y < frag_height)
399 s->superblock_fragments[j++] = s->fragment_start[plane] +
402 s->superblock_fragments[j++] = -1;
406 return 0; /* successful path out */
410 * This function sets up the dequantization tables used for a particular
413 static void init_dequantizer(Vp3DecodeContext *s, int qpi)
415 int ac_scale_factor = s->coded_ac_scale_factor[s->qps[qpi]];
416 int i, plane, inter, qri, bmi, bmj, qistart;
418 for (inter = 0; inter < 2; inter++) {
419 for (plane = 0; plane < 3; plane++) {
420 int dc_scale_factor = s->coded_dc_scale_factor[!!plane][s->qps[qpi]];
422 for (qri = 0; qri < s->qr_count[inter][plane]; qri++) {
423 sum += s->qr_size[inter][plane][qri];
424 if (s->qps[qpi] <= sum)
427 qistart = sum - s->qr_size[inter][plane][qri];
428 bmi = s->qr_base[inter][plane][qri];
429 bmj = s->qr_base[inter][plane][qri + 1];
430 for (i = 0; i < 64; i++) {
431 int coeff = (2 * (sum - s->qps[qpi]) * s->base_matrix[bmi][i] -
432 2 * (qistart - s->qps[qpi]) * s->base_matrix[bmj][i] +
433 s->qr_size[inter][plane][qri]) /
434 (2 * s->qr_size[inter][plane][qri]);
436 int qmin = 8 << (inter + !i);
437 int qscale = i ? ac_scale_factor : dc_scale_factor;
438 int qbias = (1 + inter) * 3;
439 s->qmat[qpi][inter][plane][s->idct_permutation[i]] =
440 (i == 0 || s->version < 2) ? av_clip((qscale * coeff) / 100 * 4, qmin, 4096)
441 : (qscale * (coeff - qbias) / 100 + qbias) * 4;
443 /* all DC coefficients use the same quant so as not to interfere
444 * with DC prediction */
445 s->qmat[qpi][inter][plane][0] = s->qmat[0][inter][plane][0];
451 * This function initializes the loop filter boundary limits if the frame's
452 * quality index is different from the previous frame's.
454 * The filter_limit_values may not be larger than 127.
456 static void init_loop_filter(Vp3DecodeContext *s)
458 ff_vp3dsp_set_bounding_values(s->bounding_values_array, s->filter_limit_values[s->qps[0]]);
462 * This function unpacks all of the superblock/macroblock/fragment coding
463 * information from the bitstream.
465 static int unpack_superblocks(Vp3DecodeContext *s, GetBitContext *gb)
467 int superblock_starts[3] = {
468 0, s->u_superblock_start, s->v_superblock_start
471 int current_superblock = 0;
473 int num_partial_superblocks = 0;
476 int current_fragment;
478 int plane0_num_coded_frags = 0;
481 memset(s->superblock_coding, SB_FULLY_CODED, s->superblock_count);
483 /* unpack the list of partially-coded superblocks */
484 bit = get_bits1(gb) ^ 1;
487 while (current_superblock < s->superblock_count && get_bits_left(gb) > 0) {
488 if (s->theora && current_run == MAXIMUM_LONG_BIT_RUN)
493 current_run = get_vlc2(gb, s->superblock_run_length_vlc.table,
495 if (current_run == 34)
496 current_run += get_bits(gb, 12);
498 if (current_run > s->superblock_count - current_superblock) {
499 av_log(s->avctx, AV_LOG_ERROR,
500 "Invalid partially coded superblock run length\n");
504 memset(s->superblock_coding + current_superblock, bit, current_run);
506 current_superblock += current_run;
508 num_partial_superblocks += current_run;
511 /* unpack the list of fully coded superblocks if any of the blocks were
512 * not marked as partially coded in the previous step */
513 if (num_partial_superblocks < s->superblock_count) {
514 int superblocks_decoded = 0;
516 current_superblock = 0;
517 bit = get_bits1(gb) ^ 1;
520 while (superblocks_decoded < s->superblock_count - num_partial_superblocks &&
521 get_bits_left(gb) > 0) {
522 if (s->theora && current_run == MAXIMUM_LONG_BIT_RUN)
527 current_run = get_vlc2(gb, s->superblock_run_length_vlc.table,
529 if (current_run == 34)
530 current_run += get_bits(gb, 12);
532 for (j = 0; j < current_run; current_superblock++) {
533 if (current_superblock >= s->superblock_count) {
534 av_log(s->avctx, AV_LOG_ERROR,
535 "Invalid fully coded superblock run length\n");
539 /* skip any superblocks already marked as partially coded */
540 if (s->superblock_coding[current_superblock] == SB_NOT_CODED) {
541 s->superblock_coding[current_superblock] = 2 * bit;
545 superblocks_decoded += current_run;
549 /* if there were partial blocks, initialize bitstream for
550 * unpacking fragment codings */
551 if (num_partial_superblocks) {
554 /* toggle the bit because as soon as the first run length is
555 * fetched the bit will be toggled again */
560 /* figure out which fragments are coded; iterate through each
561 * superblock (all planes) */
562 s->total_num_coded_frags = 0;
563 memset(s->macroblock_coding, MODE_COPY, s->macroblock_count);
565 s->coded_fragment_list[0] = s->keyframe ? s->kf_coded_fragment_list
566 : s->nkf_coded_fragment_list;
568 for (plane = 0; plane < 3; plane++) {
569 int sb_start = superblock_starts[plane];
570 int sb_end = sb_start + (plane ? s->c_superblock_count
571 : s->y_superblock_count);
572 int num_coded_frags = 0;
575 if (s->num_kf_coded_fragment[plane] == -1) {
576 for (i = sb_start; i < sb_end; i++) {
577 /* iterate through all 16 fragments in a superblock */
578 for (j = 0; j < 16; j++) {
579 /* if the fragment is in bounds, check its coding status */
580 current_fragment = s->superblock_fragments[i * 16 + j];
581 if (current_fragment != -1) {
582 s->coded_fragment_list[plane][num_coded_frags++] =
587 s->num_kf_coded_fragment[plane] = num_coded_frags;
589 num_coded_frags = s->num_kf_coded_fragment[plane];
591 for (i = sb_start; i < sb_end && get_bits_left(gb) > 0; i++) {
592 if (get_bits_left(gb) < plane0_num_coded_frags >> 2) {
593 return AVERROR_INVALIDDATA;
595 /* iterate through all 16 fragments in a superblock */
596 for (j = 0; j < 16; j++) {
597 /* if the fragment is in bounds, check its coding status */
598 current_fragment = s->superblock_fragments[i * 16 + j];
599 if (current_fragment != -1) {
600 int coded = s->superblock_coding[i];
602 if (coded == SB_PARTIALLY_CODED) {
603 /* fragment may or may not be coded; this is the case
604 * that cares about the fragment coding runs */
605 if (current_run-- == 0) {
607 current_run = get_vlc2(gb, s->fragment_run_length_vlc.table, 5, 2);
613 /* default mode; actual mode will be decoded in
615 s->all_fragments[current_fragment].coding_method =
617 s->coded_fragment_list[plane][num_coded_frags++] =
620 /* not coded; copy this fragment from the prior frame */
621 s->all_fragments[current_fragment].coding_method =
629 plane0_num_coded_frags = num_coded_frags;
630 s->total_num_coded_frags += num_coded_frags;
631 for (i = 0; i < 64; i++)
632 s->num_coded_frags[plane][i] = num_coded_frags;
634 s->coded_fragment_list[plane + 1] = s->coded_fragment_list[plane] +
640 #define BLOCK_X (2 * mb_x + (k & 1))
641 #define BLOCK_Y (2 * mb_y + (k >> 1))
643 #if CONFIG_VP4_DECODER
645 * @return number of blocks, or > yuv_macroblock_count on error.
646 * return value is always >= 1.
648 static int vp4_get_mb_count(Vp3DecodeContext *s, GetBitContext *gb)
652 while ((bits = show_bits(gb, 9)) == 0x1ff) {
655 if (v > s->yuv_macroblock_count) {
656 av_log(s->avctx, AV_LOG_ERROR, "Invalid run length\n");
661 skip_bits(gb, 2 + n); \
662 v += (1 << n) + get_bits(gb, n); }
663 #define thresh(n) (0x200 - (0x80 >> n))
664 #define else_if(n) else if (bits < thresh(n)) body(n)
667 } else if (bits < thresh(0)) {
684 static int vp4_get_block_pattern(Vp3DecodeContext *s, GetBitContext *gb, int *next_block_pattern_table)
686 int v = get_vlc2(gb, s->block_pattern_vlc[*next_block_pattern_table].table, 3, 2);
688 av_log(s->avctx, AV_LOG_ERROR, "Invalid block pattern\n");
689 *next_block_pattern_table = 0;
692 *next_block_pattern_table = vp4_block_pattern_table_selector[v];
696 static int vp4_unpack_macroblocks(Vp3DecodeContext *s, GetBitContext *gb)
698 int plane, i, j, k, fragment;
699 int next_block_pattern_table;
700 int bit, current_run, has_partial;
702 memset(s->macroblock_coding, MODE_COPY, s->macroblock_count);
709 for (i = 0; i < s->yuv_macroblock_count; i += current_run) {
710 if (get_bits_left(gb) <= 0)
711 return AVERROR_INVALIDDATA;
712 current_run = vp4_get_mb_count(s, gb);
713 if (current_run > s->yuv_macroblock_count - i)
715 memset(s->superblock_coding + i, 2 * bit, current_run);
721 if (get_bits_left(gb) <= 0)
722 return AVERROR_INVALIDDATA;
724 current_run = vp4_get_mb_count(s, gb);
725 for (i = 0; i < s->yuv_macroblock_count; i++) {
726 if (!s->superblock_coding[i]) {
729 current_run = vp4_get_mb_count(s, gb);
731 s->superblock_coding[i] = bit;
735 if (current_run) /* handle situation when vp4_get_mb_count() fails */
739 next_block_pattern_table = 0;
741 for (plane = 0; plane < 3; plane++) {
743 int sb_width = plane ? s->c_superblock_width : s->y_superblock_width;
744 int sb_height = plane ? s->c_superblock_height : s->y_superblock_height;
745 int mb_width = plane ? s->c_macroblock_width : s->macroblock_width;
746 int mb_height = plane ? s->c_macroblock_height : s->macroblock_height;
747 int fragment_width = s->fragment_width[!!plane];
748 int fragment_height = s->fragment_height[!!plane];
750 for (sb_y = 0; sb_y < sb_height; sb_y++) {
751 for (sb_x = 0; sb_x < sb_width; sb_x++) {
752 for (j = 0; j < 4; j++) {
753 int mb_x = 2 * sb_x + (j >> 1);
754 int mb_y = 2 * sb_y + (j >> 1) ^ (j & 1);
755 int mb_coded, pattern, coded;
757 if (mb_x >= mb_width || mb_y >= mb_height)
760 mb_coded = s->superblock_coding[i++];
762 if (mb_coded == SB_FULLY_CODED)
764 else if (mb_coded == SB_PARTIALLY_CODED)
765 pattern = vp4_get_block_pattern(s, gb, &next_block_pattern_table);
769 for (k = 0; k < 4; k++) {
770 if (BLOCK_X >= fragment_width || BLOCK_Y >= fragment_height)
772 fragment = s->fragment_start[plane] + BLOCK_Y * fragment_width + BLOCK_X;
773 coded = pattern & (8 >> k);
774 /* MODE_INTER_NO_MV is the default for coded fragments.
775 the actual method is decoded in the next phase. */
776 s->all_fragments[fragment].coding_method = coded ? MODE_INTER_NO_MV : MODE_COPY;
787 * This function unpacks all the coding mode data for individual macroblocks
788 * from the bitstream.
790 static int unpack_modes(Vp3DecodeContext *s, GetBitContext *gb)
792 int i, j, k, sb_x, sb_y;
794 int current_macroblock;
795 int current_fragment;
797 int custom_mode_alphabet[CODING_MODE_COUNT];
802 for (i = 0; i < s->fragment_count; i++)
803 s->all_fragments[i].coding_method = MODE_INTRA;
805 /* fetch the mode coding scheme for this frame */
806 scheme = get_bits(gb, 3);
808 /* is it a custom coding scheme? */
810 for (i = 0; i < 8; i++)
811 custom_mode_alphabet[i] = MODE_INTER_NO_MV;
812 for (i = 0; i < 8; i++)
813 custom_mode_alphabet[get_bits(gb, 3)] = i;
814 alphabet = custom_mode_alphabet;
816 alphabet = ModeAlphabet[scheme - 1];
818 /* iterate through all of the macroblocks that contain 1 or more
820 for (sb_y = 0; sb_y < s->y_superblock_height; sb_y++) {
821 for (sb_x = 0; sb_x < s->y_superblock_width; sb_x++) {
822 if (get_bits_left(gb) <= 0)
825 for (j = 0; j < 4; j++) {
826 int mb_x = 2 * sb_x + (j >> 1);
827 int mb_y = 2 * sb_y + (((j >> 1) + j) & 1);
828 current_macroblock = mb_y * s->macroblock_width + mb_x;
830 if (mb_x >= s->macroblock_width ||
831 mb_y >= s->macroblock_height)
834 /* coding modes are only stored if the macroblock has
835 * at least one luma block coded, otherwise it must be
837 for (k = 0; k < 4; k++) {
838 current_fragment = BLOCK_Y *
839 s->fragment_width[0] + BLOCK_X;
840 if (s->all_fragments[current_fragment].coding_method != MODE_COPY)
844 s->macroblock_coding[current_macroblock] = MODE_INTER_NO_MV;
848 /* mode 7 means get 3 bits for each coding mode */
850 coding_mode = get_bits(gb, 3);
852 coding_mode = alphabet[get_vlc2(gb, s->mode_code_vlc.table, 3, 3)];
854 s->macroblock_coding[current_macroblock] = coding_mode;
855 for (k = 0; k < 4; k++) {
856 frag = s->all_fragments + BLOCK_Y * s->fragment_width[0] + BLOCK_X;
857 if (frag->coding_method != MODE_COPY)
858 frag->coding_method = coding_mode;
861 #define SET_CHROMA_MODES \
862 if (frag[s->fragment_start[1]].coding_method != MODE_COPY) \
863 frag[s->fragment_start[1]].coding_method = coding_mode; \
864 if (frag[s->fragment_start[2]].coding_method != MODE_COPY) \
865 frag[s->fragment_start[2]].coding_method = coding_mode;
867 if (s->chroma_y_shift) {
868 frag = s->all_fragments + mb_y *
869 s->fragment_width[1] + mb_x;
871 } else if (s->chroma_x_shift) {
872 frag = s->all_fragments +
873 2 * mb_y * s->fragment_width[1] + mb_x;
874 for (k = 0; k < 2; k++) {
876 frag += s->fragment_width[1];
879 for (k = 0; k < 4; k++) {
880 frag = s->all_fragments +
881 BLOCK_Y * s->fragment_width[1] + BLOCK_X;
893 static int vp4_get_mv(Vp3DecodeContext *s, GetBitContext *gb, int axis, int last_motion)
895 int v = get_vlc2(gb, s->vp4_mv_vlc[axis][vp4_mv_table_selector[FFABS(last_motion)]].table, 6, 2) - 31;
896 return last_motion < 0 ? -v : v;
900 * This function unpacks all the motion vectors for the individual
901 * macroblocks from the bitstream.
903 static int unpack_vectors(Vp3DecodeContext *s, GetBitContext *gb)
905 int j, k, sb_x, sb_y;
909 int last_motion_x = 0;
910 int last_motion_y = 0;
911 int prior_last_motion_x = 0;
912 int prior_last_motion_y = 0;
913 int last_gold_motion_x = 0;
914 int last_gold_motion_y = 0;
915 int current_macroblock;
916 int current_fragment;
922 /* coding mode 0 is the VLC scheme; 1 is the fixed code scheme; 2 is VP4 code scheme */
923 coding_mode = s->version < 2 ? get_bits1(gb) : 2;
925 /* iterate through all of the macroblocks that contain 1 or more
927 for (sb_y = 0; sb_y < s->y_superblock_height; sb_y++) {
928 for (sb_x = 0; sb_x < s->y_superblock_width; sb_x++) {
929 if (get_bits_left(gb) <= 0)
932 for (j = 0; j < 4; j++) {
933 int mb_x = 2 * sb_x + (j >> 1);
934 int mb_y = 2 * sb_y + (((j >> 1) + j) & 1);
935 current_macroblock = mb_y * s->macroblock_width + mb_x;
937 if (mb_x >= s->macroblock_width ||
938 mb_y >= s->macroblock_height ||
939 s->macroblock_coding[current_macroblock] == MODE_COPY)
942 switch (s->macroblock_coding[current_macroblock]) {
944 if (coding_mode == 2) { /* VP4 */
945 last_gold_motion_x = motion_x[0] = vp4_get_mv(s, gb, 0, last_gold_motion_x);
946 last_gold_motion_y = motion_y[0] = vp4_get_mv(s, gb, 1, last_gold_motion_y);
948 } /* otherwise fall through */
949 case MODE_INTER_PLUS_MV:
950 /* all 6 fragments use the same motion vector */
951 if (coding_mode == 0) {
952 motion_x[0] = motion_vector_table[get_vlc2(gb, s->motion_vector_vlc.table, 6, 2)];
953 motion_y[0] = motion_vector_table[get_vlc2(gb, s->motion_vector_vlc.table, 6, 2)];
954 } else if (coding_mode == 1) {
955 motion_x[0] = fixed_motion_vector_table[get_bits(gb, 6)];
956 motion_y[0] = fixed_motion_vector_table[get_bits(gb, 6)];
958 motion_x[0] = vp4_get_mv(s, gb, 0, last_motion_x);
959 motion_y[0] = vp4_get_mv(s, gb, 1, last_motion_y);
962 /* vector maintenance, only on MODE_INTER_PLUS_MV */
963 if (s->macroblock_coding[current_macroblock] == MODE_INTER_PLUS_MV) {
964 prior_last_motion_x = last_motion_x;
965 prior_last_motion_y = last_motion_y;
966 last_motion_x = motion_x[0];
967 last_motion_y = motion_y[0];
971 case MODE_INTER_FOURMV:
972 /* vector maintenance */
973 prior_last_motion_x = last_motion_x;
974 prior_last_motion_y = last_motion_y;
976 /* fetch 4 vectors from the bitstream, one for each
977 * Y fragment, then average for the C fragment vectors */
978 for (k = 0; k < 4; k++) {
979 current_fragment = BLOCK_Y * s->fragment_width[0] + BLOCK_X;
980 if (s->all_fragments[current_fragment].coding_method != MODE_COPY) {
981 if (coding_mode == 0) {
982 motion_x[k] = motion_vector_table[get_vlc2(gb, s->motion_vector_vlc.table, 6, 2)];
983 motion_y[k] = motion_vector_table[get_vlc2(gb, s->motion_vector_vlc.table, 6, 2)];
984 } else if (coding_mode == 1) {
985 motion_x[k] = fixed_motion_vector_table[get_bits(gb, 6)];
986 motion_y[k] = fixed_motion_vector_table[get_bits(gb, 6)];
988 motion_x[k] = vp4_get_mv(s, gb, 0, prior_last_motion_x);
989 motion_y[k] = vp4_get_mv(s, gb, 1, prior_last_motion_y);
991 last_motion_x = motion_x[k];
992 last_motion_y = motion_y[k];
1000 case MODE_INTER_LAST_MV:
1001 /* all 6 fragments use the last motion vector */
1002 motion_x[0] = last_motion_x;
1003 motion_y[0] = last_motion_y;
1005 /* no vector maintenance (last vector remains the
1009 case MODE_INTER_PRIOR_LAST:
1010 /* all 6 fragments use the motion vector prior to the
1011 * last motion vector */
1012 motion_x[0] = prior_last_motion_x;
1013 motion_y[0] = prior_last_motion_y;
1015 /* vector maintenance */
1016 prior_last_motion_x = last_motion_x;
1017 prior_last_motion_y = last_motion_y;
1018 last_motion_x = motion_x[0];
1019 last_motion_y = motion_y[0];
1023 /* covers intra, inter without MV, golden without MV */
1027 /* no vector maintenance */
1031 /* assign the motion vectors to the correct fragments */
1032 for (k = 0; k < 4; k++) {
1034 BLOCK_Y * s->fragment_width[0] + BLOCK_X;
1035 if (s->macroblock_coding[current_macroblock] == MODE_INTER_FOURMV) {
1036 s->motion_val[0][current_fragment][0] = motion_x[k];
1037 s->motion_val[0][current_fragment][1] = motion_y[k];
1039 s->motion_val[0][current_fragment][0] = motion_x[0];
1040 s->motion_val[0][current_fragment][1] = motion_y[0];
1044 if (s->chroma_y_shift) {
1045 if (s->macroblock_coding[current_macroblock] == MODE_INTER_FOURMV) {
1046 motion_x[0] = RSHIFT(motion_x[0] + motion_x[1] +
1047 motion_x[2] + motion_x[3], 2);
1048 motion_y[0] = RSHIFT(motion_y[0] + motion_y[1] +
1049 motion_y[2] + motion_y[3], 2);
1051 if (s->version <= 2) {
1052 motion_x[0] = (motion_x[0] >> 1) | (motion_x[0] & 1);
1053 motion_y[0] = (motion_y[0] >> 1) | (motion_y[0] & 1);
1055 frag = mb_y * s->fragment_width[1] + mb_x;
1056 s->motion_val[1][frag][0] = motion_x[0];
1057 s->motion_val[1][frag][1] = motion_y[0];
1058 } else if (s->chroma_x_shift) {
1059 if (s->macroblock_coding[current_macroblock] == MODE_INTER_FOURMV) {
1060 motion_x[0] = RSHIFT(motion_x[0] + motion_x[1], 1);
1061 motion_y[0] = RSHIFT(motion_y[0] + motion_y[1], 1);
1062 motion_x[1] = RSHIFT(motion_x[2] + motion_x[3], 1);
1063 motion_y[1] = RSHIFT(motion_y[2] + motion_y[3], 1);
1065 motion_x[1] = motion_x[0];
1066 motion_y[1] = motion_y[0];
1068 if (s->version <= 2) {
1069 motion_x[0] = (motion_x[0] >> 1) | (motion_x[0] & 1);
1070 motion_x[1] = (motion_x[1] >> 1) | (motion_x[1] & 1);
1072 frag = 2 * mb_y * s->fragment_width[1] + mb_x;
1073 for (k = 0; k < 2; k++) {
1074 s->motion_val[1][frag][0] = motion_x[k];
1075 s->motion_val[1][frag][1] = motion_y[k];
1076 frag += s->fragment_width[1];
1079 for (k = 0; k < 4; k++) {
1080 frag = BLOCK_Y * s->fragment_width[1] + BLOCK_X;
1081 if (s->macroblock_coding[current_macroblock] == MODE_INTER_FOURMV) {
1082 s->motion_val[1][frag][0] = motion_x[k];
1083 s->motion_val[1][frag][1] = motion_y[k];
1085 s->motion_val[1][frag][0] = motion_x[0];
1086 s->motion_val[1][frag][1] = motion_y[0];
1097 static int unpack_block_qpis(Vp3DecodeContext *s, GetBitContext *gb)
1099 int qpi, i, j, bit, run_length, blocks_decoded, num_blocks_at_qpi;
1100 int num_blocks = s->total_num_coded_frags;
1102 for (qpi = 0; qpi < s->nqps - 1 && num_blocks > 0; qpi++) {
1103 i = blocks_decoded = num_blocks_at_qpi = 0;
1105 bit = get_bits1(gb) ^ 1;
1109 if (run_length == MAXIMUM_LONG_BIT_RUN)
1110 bit = get_bits1(gb);
1114 run_length = get_vlc2(gb, s->superblock_run_length_vlc.table, 6, 2) + 1;
1115 if (run_length == 34)
1116 run_length += get_bits(gb, 12);
1117 blocks_decoded += run_length;
1120 num_blocks_at_qpi += run_length;
1122 for (j = 0; j < run_length; i++) {
1123 if (i >= s->total_num_coded_frags)
1126 if (s->all_fragments[s->coded_fragment_list[0][i]].qpi == qpi) {
1127 s->all_fragments[s->coded_fragment_list[0][i]].qpi += bit;
1131 } while (blocks_decoded < num_blocks && get_bits_left(gb) > 0);
1133 num_blocks -= num_blocks_at_qpi;
1139 static inline int get_eob_run(GetBitContext *gb, int token)
1141 int v = eob_run_table[token].base;
1142 if (eob_run_table[token].bits)
1143 v += get_bits(gb, eob_run_table[token].bits);
1147 static inline int get_coeff(GetBitContext *gb, int token, int16_t *coeff)
1149 int bits_to_get, zero_run;
1151 bits_to_get = coeff_get_bits[token];
1153 bits_to_get = get_bits(gb, bits_to_get);
1154 *coeff = coeff_tables[token][bits_to_get];
1156 zero_run = zero_run_base[token];
1157 if (zero_run_get_bits[token])
1158 zero_run += get_bits(gb, zero_run_get_bits[token]);
1164 * This function is called by unpack_dct_coeffs() to extract the VLCs from
1165 * the bitstream. The VLCs encode tokens which are used to unpack DCT
1166 * data. This function unpacks all the VLCs for either the Y plane or both
1167 * C planes, and is called for DC coefficients or different AC coefficient
1168 * levels (since different coefficient types require different VLC tables.
1170 * This function returns a residual eob run. E.g, if a particular token gave
1171 * instructions to EOB the next 5 fragments and there were only 2 fragments
1172 * left in the current fragment range, 3 would be returned so that it could
1173 * be passed into the next call to this same function.
1175 static int unpack_vlcs(Vp3DecodeContext *s, GetBitContext *gb,
1176 VLC *table, int coeff_index,
1186 int num_coeffs = s->num_coded_frags[plane][coeff_index];
1187 int16_t *dct_tokens = s->dct_tokens[plane][coeff_index];
1189 /* local references to structure members to avoid repeated dereferences */
1190 int *coded_fragment_list = s->coded_fragment_list[plane];
1191 Vp3Fragment *all_fragments = s->all_fragments;
1192 VLC_TYPE(*vlc_table)[2] = table->table;
1194 if (num_coeffs < 0) {
1195 av_log(s->avctx, AV_LOG_ERROR,
1196 "Invalid number of coefficients at level %d\n", coeff_index);
1197 return AVERROR_INVALIDDATA;
1200 if (eob_run > num_coeffs) {
1202 blocks_ended = num_coeffs;
1203 eob_run -= num_coeffs;
1206 blocks_ended = eob_run;
1210 // insert fake EOB token to cover the split between planes or zzi
1212 dct_tokens[j++] = blocks_ended << 2;
1214 while (coeff_i < num_coeffs && get_bits_left(gb) > 0) {
1215 /* decode a VLC into a token */
1216 token = get_vlc2(gb, vlc_table, 11, 3);
1217 /* use the token to get a zero run, a coefficient, and an eob run */
1218 if ((unsigned) token <= 6U) {
1219 eob_run = get_eob_run(gb, token);
1223 // record only the number of blocks ended in this plane,
1224 // any spill will be recorded in the next plane.
1225 if (eob_run > num_coeffs - coeff_i) {
1226 dct_tokens[j++] = TOKEN_EOB(num_coeffs - coeff_i);
1227 blocks_ended += num_coeffs - coeff_i;
1228 eob_run -= num_coeffs - coeff_i;
1229 coeff_i = num_coeffs;
1231 dct_tokens[j++] = TOKEN_EOB(eob_run);
1232 blocks_ended += eob_run;
1236 } else if (token >= 0) {
1237 zero_run = get_coeff(gb, token, &coeff);
1240 dct_tokens[j++] = TOKEN_ZERO_RUN(coeff, zero_run);
1242 // Save DC into the fragment structure. DC prediction is
1243 // done in raster order, so the actual DC can't be in with
1244 // other tokens. We still need the token in dct_tokens[]
1245 // however, or else the structure collapses on itself.
1247 all_fragments[coded_fragment_list[coeff_i]].dc = coeff;
1249 dct_tokens[j++] = TOKEN_COEFF(coeff);
1252 if (coeff_index + zero_run > 64) {
1253 av_log(s->avctx, AV_LOG_DEBUG,
1254 "Invalid zero run of %d with %d coeffs left\n",
1255 zero_run, 64 - coeff_index);
1256 zero_run = 64 - coeff_index;
1259 // zero runs code multiple coefficients,
1260 // so don't try to decode coeffs for those higher levels
1261 for (i = coeff_index + 1; i <= coeff_index + zero_run; i++)
1262 s->num_coded_frags[plane][i]--;
1265 av_log(s->avctx, AV_LOG_ERROR, "Invalid token %d\n", token);
1270 if (blocks_ended > s->num_coded_frags[plane][coeff_index])
1271 av_log(s->avctx, AV_LOG_ERROR, "More blocks ended than coded!\n");
1273 // decrement the number of blocks that have higher coefficients for each
1274 // EOB run at this level
1276 for (i = coeff_index + 1; i < 64; i++)
1277 s->num_coded_frags[plane][i] -= blocks_ended;
1279 // setup the next buffer
1281 s->dct_tokens[plane + 1][coeff_index] = dct_tokens + j;
1282 else if (coeff_index < 63)
1283 s->dct_tokens[0][coeff_index + 1] = dct_tokens + j;
1288 static void reverse_dc_prediction(Vp3DecodeContext *s,
1291 int fragment_height);
1293 * This function unpacks all of the DCT coefficient data from the
1296 static int unpack_dct_coeffs(Vp3DecodeContext *s, GetBitContext *gb)
1303 int residual_eob_run = 0;
1307 s->dct_tokens[0][0] = s->dct_tokens_base;
1309 if (get_bits_left(gb) < 16)
1310 return AVERROR_INVALIDDATA;
1312 /* fetch the DC table indexes */
1313 dc_y_table = get_bits(gb, 4);
1314 dc_c_table = get_bits(gb, 4);
1316 /* unpack the Y plane DC coefficients */
1317 residual_eob_run = unpack_vlcs(s, gb, &s->dc_vlc[dc_y_table], 0,
1318 0, residual_eob_run);
1319 if (residual_eob_run < 0)
1320 return residual_eob_run;
1321 if (get_bits_left(gb) < 8)
1322 return AVERROR_INVALIDDATA;
1324 /* reverse prediction of the Y-plane DC coefficients */
1325 reverse_dc_prediction(s, 0, s->fragment_width[0], s->fragment_height[0]);
1327 /* unpack the C plane DC coefficients */
1328 residual_eob_run = unpack_vlcs(s, gb, &s->dc_vlc[dc_c_table], 0,
1329 1, residual_eob_run);
1330 if (residual_eob_run < 0)
1331 return residual_eob_run;
1332 residual_eob_run = unpack_vlcs(s, gb, &s->dc_vlc[dc_c_table], 0,
1333 2, residual_eob_run);
1334 if (residual_eob_run < 0)
1335 return residual_eob_run;
1337 /* reverse prediction of the C-plane DC coefficients */
1338 if (!(s->avctx->flags & AV_CODEC_FLAG_GRAY)) {
1339 reverse_dc_prediction(s, s->fragment_start[1],
1340 s->fragment_width[1], s->fragment_height[1]);
1341 reverse_dc_prediction(s, s->fragment_start[2],
1342 s->fragment_width[1], s->fragment_height[1]);
1345 if (get_bits_left(gb) < 8)
1346 return AVERROR_INVALIDDATA;
1347 /* fetch the AC table indexes */
1348 ac_y_table = get_bits(gb, 4);
1349 ac_c_table = get_bits(gb, 4);
1351 /* build tables of AC VLC tables */
1352 for (i = 1; i <= 5; i++) {
1353 y_tables[i] = &s->ac_vlc_1[ac_y_table];
1354 c_tables[i] = &s->ac_vlc_1[ac_c_table];
1356 for (i = 6; i <= 14; i++) {
1357 y_tables[i] = &s->ac_vlc_2[ac_y_table];
1358 c_tables[i] = &s->ac_vlc_2[ac_c_table];
1360 for (i = 15; i <= 27; i++) {
1361 y_tables[i] = &s->ac_vlc_3[ac_y_table];
1362 c_tables[i] = &s->ac_vlc_3[ac_c_table];
1364 for (i = 28; i <= 63; i++) {
1365 y_tables[i] = &s->ac_vlc_4[ac_y_table];
1366 c_tables[i] = &s->ac_vlc_4[ac_c_table];
1369 /* decode all AC coefficients */
1370 for (i = 1; i <= 63; i++) {
1371 residual_eob_run = unpack_vlcs(s, gb, y_tables[i], i,
1372 0, residual_eob_run);
1373 if (residual_eob_run < 0)
1374 return residual_eob_run;
1376 residual_eob_run = unpack_vlcs(s, gb, c_tables[i], i,
1377 1, residual_eob_run);
1378 if (residual_eob_run < 0)
1379 return residual_eob_run;
1380 residual_eob_run = unpack_vlcs(s, gb, c_tables[i], i,
1381 2, residual_eob_run);
1382 if (residual_eob_run < 0)
1383 return residual_eob_run;
1389 #if CONFIG_VP4_DECODER
1391 * eob_tracker[] is instead of TOKEN_EOB(value)
1392 * a dummy TOKEN_EOB(0) value is used to make vp3_dequant work
1394 * @return < 0 on error
1396 static int vp4_unpack_vlcs(Vp3DecodeContext *s, GetBitContext *gb,
1397 VLC *vlc_tables[64],
1398 int plane, int eob_tracker[64], int fragment)
1406 while (!eob_tracker[coeff_i]) {
1407 if (get_bits_left(gb) < 1)
1408 return AVERROR_INVALIDDATA;
1410 token = get_vlc2(gb, vlc_tables[coeff_i]->table, 11, 3);
1412 /* use the token to get a zero run, a coefficient, and an eob run */
1413 if ((unsigned) token <= 6U) {
1414 eob_run = get_eob_run(gb, token);
1415 *s->dct_tokens[plane][coeff_i]++ = TOKEN_EOB(0);
1416 eob_tracker[coeff_i] = eob_run - 1;
1418 } else if (token >= 0) {
1419 zero_run = get_coeff(gb, token, &coeff);
1422 if (coeff_i + zero_run > 64) {
1423 av_log(s->avctx, AV_LOG_DEBUG,
1424 "Invalid zero run of %d with %d coeffs left\n",
1425 zero_run, 64 - coeff_i);
1426 zero_run = 64 - coeff_i;
1428 *s->dct_tokens[plane][coeff_i]++ = TOKEN_ZERO_RUN(coeff, zero_run);
1429 coeff_i += zero_run;
1432 s->all_fragments[fragment].dc = coeff;
1434 *s->dct_tokens[plane][coeff_i]++ = TOKEN_COEFF(coeff);
1437 if (coeff_i >= 64) /* > 64 occurs when there is a zero_run overflow */
1438 return 0; /* stop */
1440 av_log(s->avctx, AV_LOG_ERROR, "Invalid token %d\n", token);
1444 *s->dct_tokens[plane][coeff_i]++ = TOKEN_EOB(0);
1445 eob_tracker[coeff_i]--;
1449 static void vp4_dc_predictor_reset(VP4Predictor *p)
1452 p->type = VP4_DC_UNDEFINED;
1455 static void vp4_dc_pred_before(const Vp3DecodeContext *s, VP4Predictor dc_pred[6][6], int sb_x)
1459 for (i = 0; i < 4; i++)
1460 dc_pred[0][i + 1] = s->dc_pred_row[sb_x * 4 + i];
1462 for (j = 1; j < 5; j++)
1463 for (i = 0; i < 4; i++)
1464 vp4_dc_predictor_reset(&dc_pred[j][i + 1]);
1467 static void vp4_dc_pred_after(Vp3DecodeContext *s, VP4Predictor dc_pred[6][6], int sb_x)
1471 for (i = 0; i < 4; i++)
1472 s->dc_pred_row[sb_x * 4 + i] = dc_pred[4][i + 1];
1474 for (i = 1; i < 5; i++)
1475 dc_pred[i][0] = dc_pred[i][4];
1478 /* note: dc_pred points to the current block */
1479 static int vp4_dc_pred(const Vp3DecodeContext *s, const VP4Predictor * dc_pred, const int * last_dc, int type, int plane)
1484 if (dc_pred[-6].type == type) {
1485 dc += dc_pred[-6].dc;
1489 if (dc_pred[6].type == type) {
1490 dc += dc_pred[6].dc;
1494 if (count != 2 && dc_pred[-1].type == type) {
1495 dc += dc_pred[-1].dc;
1499 if (count != 2 && dc_pred[1].type == type) {
1500 dc += dc_pred[1].dc;
1504 /* using division instead of shift to correctly handle negative values */
1505 return count == 2 ? dc / 2 : last_dc[type];
1508 static void vp4_set_tokens_base(Vp3DecodeContext *s)
1511 int16_t *base = s->dct_tokens_base;
1512 for (plane = 0; plane < 3; plane++) {
1513 for (i = 0; i < 64; i++) {
1514 s->dct_tokens[plane][i] = base;
1515 base += s->fragment_width[!!plane] * s->fragment_height[!!plane];
1520 static int vp4_unpack_dct_coeffs(Vp3DecodeContext *s, GetBitContext *gb)
1528 int plane, sb_y, sb_x;
1529 int eob_tracker[64];
1530 VP4Predictor dc_pred[6][6];
1531 int last_dc[NB_VP4_DC_TYPES];
1533 if (get_bits_left(gb) < 16)
1534 return AVERROR_INVALIDDATA;
1536 /* fetch the DC table indexes */
1537 dc_y_table = get_bits(gb, 4);
1538 dc_c_table = get_bits(gb, 4);
1540 ac_y_table = get_bits(gb, 4);
1541 ac_c_table = get_bits(gb, 4);
1543 /* build tables of DC/AC VLC tables */
1545 tables[0][0] = &s->dc_vlc[dc_y_table];
1546 tables[1][0] = &s->dc_vlc[dc_c_table];
1547 for (i = 1; i <= 5; i++) {
1548 tables[0][i] = &s->ac_vlc_1[ac_y_table];
1549 tables[1][i] = &s->ac_vlc_1[ac_c_table];
1551 for (i = 6; i <= 14; i++) {
1552 tables[0][i] = &s->ac_vlc_2[ac_y_table];
1553 tables[1][i] = &s->ac_vlc_2[ac_c_table];
1555 for (i = 15; i <= 27; i++) {
1556 tables[0][i] = &s->ac_vlc_3[ac_y_table];
1557 tables[1][i] = &s->ac_vlc_3[ac_c_table];
1559 for (i = 28; i <= 63; i++) {
1560 tables[0][i] = &s->ac_vlc_4[ac_y_table];
1561 tables[1][i] = &s->ac_vlc_4[ac_c_table];
1564 vp4_set_tokens_base(s);
1566 memset(last_dc, 0, sizeof(last_dc));
1568 for (plane = 0; plane < ((s->avctx->flags & AV_CODEC_FLAG_GRAY) ? 1 : 3); plane++) {
1569 memset(eob_tracker, 0, sizeof(eob_tracker));
1571 /* initialise dc prediction */
1572 for (i = 0; i < s->fragment_width[!!plane]; i++)
1573 vp4_dc_predictor_reset(&s->dc_pred_row[i]);
1575 for (j = 0; j < 6; j++)
1576 for (i = 0; i < 6; i++)
1577 vp4_dc_predictor_reset(&dc_pred[j][i]);
1579 for (sb_y = 0; sb_y * 4 < s->fragment_height[!!plane]; sb_y++) {
1580 for (sb_x = 0; sb_x *4 < s->fragment_width[!!plane]; sb_x++) {
1581 vp4_dc_pred_before(s, dc_pred, sb_x);
1582 for (j = 0; j < 16; j++) {
1583 int hx = hilbert_offset[j][0];
1584 int hy = hilbert_offset[j][1];
1585 int x = 4 * sb_x + hx;
1586 int y = 4 * sb_y + hy;
1587 VP4Predictor *this_dc_pred = &dc_pred[hy + 1][hx + 1];
1588 int fragment, dc_block_type;
1590 if (x >= s->fragment_width[!!plane] || y >= s->fragment_height[!!plane])
1593 fragment = s->fragment_start[plane] + y * s->fragment_width[!!plane] + x;
1595 if (s->all_fragments[fragment].coding_method == MODE_COPY)
1598 if (vp4_unpack_vlcs(s, gb, tables[!!plane], plane, eob_tracker, fragment) < 0)
1601 dc_block_type = vp4_pred_block_type_map[s->all_fragments[fragment].coding_method];
1603 s->all_fragments[fragment].dc +=
1604 vp4_dc_pred(s, this_dc_pred, last_dc, dc_block_type, plane);
1606 this_dc_pred->type = dc_block_type,
1607 this_dc_pred->dc = last_dc[dc_block_type] = s->all_fragments[fragment].dc;
1609 vp4_dc_pred_after(s, dc_pred, sb_x);
1614 vp4_set_tokens_base(s);
1621 * This function reverses the DC prediction for each coded fragment in
1622 * the frame. Much of this function is adapted directly from the original
1625 #define COMPATIBLE_FRAME(x) \
1626 (compatible_frame[s->all_fragments[x].coding_method] == current_frame_type)
1627 #define DC_COEFF(u) s->all_fragments[u].dc
1629 static void reverse_dc_prediction(Vp3DecodeContext *s,
1632 int fragment_height)
1640 int i = first_fragment;
1644 /* DC values for the left, up-left, up, and up-right fragments */
1645 int vl, vul, vu, vur;
1647 /* indexes for the left, up-left, up, and up-right fragments */
1651 * The 6 fields mean:
1652 * 0: up-left multiplier
1654 * 2: up-right multiplier
1655 * 3: left multiplier
1657 static const int predictor_transform[16][4] = {
1659 { 0, 0, 0, 128 }, // PL
1660 { 0, 0, 128, 0 }, // PUR
1661 { 0, 0, 53, 75 }, // PUR|PL
1662 { 0, 128, 0, 0 }, // PU
1663 { 0, 64, 0, 64 }, // PU |PL
1664 { 0, 128, 0, 0 }, // PU |PUR
1665 { 0, 0, 53, 75 }, // PU |PUR|PL
1666 { 128, 0, 0, 0 }, // PUL
1667 { 0, 0, 0, 128 }, // PUL|PL
1668 { 64, 0, 64, 0 }, // PUL|PUR
1669 { 0, 0, 53, 75 }, // PUL|PUR|PL
1670 { 0, 128, 0, 0 }, // PUL|PU
1671 { -104, 116, 0, 116 }, // PUL|PU |PL
1672 { 24, 80, 24, 0 }, // PUL|PU |PUR
1673 { -104, 116, 0, 116 } // PUL|PU |PUR|PL
1676 /* This table shows which types of blocks can use other blocks for
1677 * prediction. For example, INTRA is the only mode in this table to
1678 * have a frame number of 0. That means INTRA blocks can only predict
1679 * from other INTRA blocks. There are 2 golden frame coding types;
1680 * blocks encoding in these modes can only predict from other blocks
1681 * that were encoded with these 1 of these 2 modes. */
1682 static const unsigned char compatible_frame[9] = {
1683 1, /* MODE_INTER_NO_MV */
1685 1, /* MODE_INTER_PLUS_MV */
1686 1, /* MODE_INTER_LAST_MV */
1687 1, /* MODE_INTER_PRIOR_MV */
1688 2, /* MODE_USING_GOLDEN */
1689 2, /* MODE_GOLDEN_MV */
1690 1, /* MODE_INTER_FOUR_MV */
1693 int current_frame_type;
1695 /* there is a last DC predictor for each of the 3 frame types */
1708 /* for each fragment row... */
1709 for (y = 0; y < fragment_height; y++) {
1710 /* for each fragment in a row... */
1711 for (x = 0; x < fragment_width; x++, i++) {
1713 /* reverse prediction if this block was coded */
1714 if (s->all_fragments[i].coding_method != MODE_COPY) {
1715 current_frame_type =
1716 compatible_frame[s->all_fragments[i].coding_method];
1722 if (COMPATIBLE_FRAME(l))
1726 u = i - fragment_width;
1728 if (COMPATIBLE_FRAME(u))
1731 ul = i - fragment_width - 1;
1733 if (COMPATIBLE_FRAME(ul))
1736 if (x + 1 < fragment_width) {
1737 ur = i - fragment_width + 1;
1739 if (COMPATIBLE_FRAME(ur))
1744 if (transform == 0) {
1745 /* if there were no fragments to predict from, use last
1747 predicted_dc = last_dc[current_frame_type];
1749 /* apply the appropriate predictor transform */
1751 (predictor_transform[transform][0] * vul) +
1752 (predictor_transform[transform][1] * vu) +
1753 (predictor_transform[transform][2] * vur) +
1754 (predictor_transform[transform][3] * vl);
1756 predicted_dc /= 128;
1758 /* check for outranging on the [ul u l] and
1759 * [ul u ur l] predictors */
1760 if ((transform == 15) || (transform == 13)) {
1761 if (FFABS(predicted_dc - vu) > 128)
1763 else if (FFABS(predicted_dc - vl) > 128)
1765 else if (FFABS(predicted_dc - vul) > 128)
1770 /* at long last, apply the predictor */
1771 DC_COEFF(i) += predicted_dc;
1773 last_dc[current_frame_type] = DC_COEFF(i);
1779 static void apply_loop_filter(Vp3DecodeContext *s, int plane,
1780 int ystart, int yend)
1783 int *bounding_values = s->bounding_values_array + 127;
1785 int width = s->fragment_width[!!plane];
1786 int height = s->fragment_height[!!plane];
1787 int fragment = s->fragment_start[plane] + ystart * width;
1788 ptrdiff_t stride = s->current_frame.f->linesize[plane];
1789 uint8_t *plane_data = s->current_frame.f->data[plane];
1790 if (!s->flipped_image)
1792 plane_data += s->data_offset[plane] + 8 * ystart * stride;
1794 for (y = ystart; y < yend; y++) {
1795 for (x = 0; x < width; x++) {
1796 /* This code basically just deblocks on the edges of coded blocks.
1797 * However, it has to be much more complicated because of the
1798 * brain damaged deblock ordering used in VP3/Theora. Order matters
1799 * because some pixels get filtered twice. */
1800 if (s->all_fragments[fragment].coding_method != MODE_COPY) {
1801 /* do not perform left edge filter for left columns frags */
1803 s->vp3dsp.h_loop_filter(
1805 stride, bounding_values);
1808 /* do not perform top edge filter for top row fragments */
1810 s->vp3dsp.v_loop_filter(
1812 stride, bounding_values);
1815 /* do not perform right edge filter for right column
1816 * fragments or if right fragment neighbor is also coded
1817 * in this frame (it will be filtered in next iteration) */
1818 if ((x < width - 1) &&
1819 (s->all_fragments[fragment + 1].coding_method == MODE_COPY)) {
1820 s->vp3dsp.h_loop_filter(
1821 plane_data + 8 * x + 8,
1822 stride, bounding_values);
1825 /* do not perform bottom edge filter for bottom row
1826 * fragments or if bottom fragment neighbor is also coded
1827 * in this frame (it will be filtered in the next row) */
1828 if ((y < height - 1) &&
1829 (s->all_fragments[fragment + width].coding_method == MODE_COPY)) {
1830 s->vp3dsp.v_loop_filter(
1831 plane_data + 8 * x + 8 * stride,
1832 stride, bounding_values);
1838 plane_data += 8 * stride;
1843 * Pull DCT tokens from the 64 levels to decode and dequant the coefficients
1844 * for the next block in coding order
1846 static inline int vp3_dequant(Vp3DecodeContext *s, Vp3Fragment *frag,
1847 int plane, int inter, int16_t block[64])
1849 int16_t *dequantizer = s->qmat[frag->qpi][inter][plane];
1850 uint8_t *perm = s->idct_scantable;
1854 int token = *s->dct_tokens[plane][i];
1855 switch (token & 3) {
1857 if (--token < 4) // 0-3 are token types so the EOB run must now be 0
1858 s->dct_tokens[plane][i]++;
1860 *s->dct_tokens[plane][i] = token & ~3;
1863 s->dct_tokens[plane][i]++;
1864 i += (token >> 2) & 0x7f;
1866 av_log(s->avctx, AV_LOG_ERROR, "Coefficient index overflow\n");
1869 block[perm[i]] = (token >> 9) * dequantizer[perm[i]];
1873 block[perm[i]] = (token >> 2) * dequantizer[perm[i]];
1874 s->dct_tokens[plane][i++]++;
1876 default: // shouldn't happen
1880 // return value is expected to be a valid level
1883 // the actual DC+prediction is in the fragment structure
1884 block[0] = frag->dc * s->qmat[0][inter][plane][0];
1889 * called when all pixels up to row y are complete
1891 static void vp3_draw_horiz_band(Vp3DecodeContext *s, int y)
1894 int offset[AV_NUM_DATA_POINTERS];
1896 if (HAVE_THREADS && s->avctx->active_thread_type & FF_THREAD_FRAME) {
1897 int y_flipped = s->flipped_image ? s->height - y : y;
1899 /* At the end of the frame, report INT_MAX instead of the height of
1900 * the frame. This makes the other threads' ff_thread_await_progress()
1901 * calls cheaper, because they don't have to clip their values. */
1902 ff_thread_report_progress(&s->current_frame,
1903 y_flipped == s->height ? INT_MAX
1908 if (!s->avctx->draw_horiz_band)
1911 h = y - s->last_slice_end;
1912 s->last_slice_end = y;
1915 if (!s->flipped_image)
1916 y = s->height - y - h;
1918 cy = y >> s->chroma_y_shift;
1919 offset[0] = s->current_frame.f->linesize[0] * y;
1920 offset[1] = s->current_frame.f->linesize[1] * cy;
1921 offset[2] = s->current_frame.f->linesize[2] * cy;
1922 for (i = 3; i < AV_NUM_DATA_POINTERS; i++)
1926 s->avctx->draw_horiz_band(s->avctx, s->current_frame.f, offset, y, 3, h);
1930 * Wait for the reference frame of the current fragment.
1931 * The progress value is in luma pixel rows.
1933 static void await_reference_row(Vp3DecodeContext *s, Vp3Fragment *fragment,
1934 int motion_y, int y)
1936 ThreadFrame *ref_frame;
1938 int border = motion_y & 1;
1940 if (fragment->coding_method == MODE_USING_GOLDEN ||
1941 fragment->coding_method == MODE_GOLDEN_MV)
1942 ref_frame = &s->golden_frame;
1944 ref_frame = &s->last_frame;
1946 ref_row = y + (motion_y >> 1);
1947 ref_row = FFMAX(FFABS(ref_row), ref_row + 8 + border);
1949 ff_thread_await_progress(ref_frame, ref_row, 0);
1952 #if CONFIG_VP4_DECODER
1954 * @return non-zero if temp (edge_emu_buffer) was populated
1956 static int vp4_mc_loop_filter(Vp3DecodeContext *s, int plane, int motion_x, int motion_y, int bx, int by,
1957 uint8_t * motion_source, int stride, int src_x, int src_y, uint8_t *temp)
1959 int motion_shift = plane ? 4 : 2;
1960 int subpel_mask = plane ? 3 : 1;
1961 int *bounding_values = s->bounding_values_array + 127;
1966 int x_subpel, y_subpel;
1967 int x_offset, y_offset;
1969 int block_width = plane ? 8 : 16;
1970 int plane_width = s->width >> (plane && s->chroma_x_shift);
1971 int plane_height = s->height >> (plane && s->chroma_y_shift);
1973 #define loop_stride 12
1974 uint8_t loop[12 * loop_stride];
1976 /* using division instead of shift to correctly handle negative values */
1977 x = 8 * bx + motion_x / motion_shift;
1978 y = 8 * by + motion_y / motion_shift;
1980 x_subpel = motion_x & subpel_mask;
1981 y_subpel = motion_y & subpel_mask;
1983 if (x_subpel || y_subpel) {
1988 x = FFMIN(x, x + FFSIGN(motion_x));
1991 y = FFMIN(y, y + FFSIGN(motion_y));
1993 x2 = x + block_width;
1994 y2 = y + block_width;
1996 if (x2 < 0 || x2 >= plane_width || y2 < 0 || y2 >= plane_height)
1999 x_offset = (-(x + 2) & 7) + 2;
2000 y_offset = (-(y + 2) & 7) + 2;
2002 if (x_offset > 8 + x_subpel && y_offset > 8 + y_subpel)
2005 s->vdsp.emulated_edge_mc(loop, motion_source - stride - 1,
2006 loop_stride, stride,
2007 12, 12, src_x - 1, src_y - 1,
2011 if (x_offset <= 8 + x_subpel)
2012 ff_vp3dsp_h_loop_filter_12(loop + x_offset, loop_stride, bounding_values);
2014 if (y_offset <= 8 + y_subpel)
2015 ff_vp3dsp_v_loop_filter_12(loop + y_offset*loop_stride, loop_stride, bounding_values);
2022 if (!x_offset && !y_offset)
2025 s->vdsp.emulated_edge_mc(loop, motion_source - stride - 1,
2026 loop_stride, stride,
2027 12, 12, src_x - 1, src_y - 1,
2031 #define safe_loop_filter(name, ptr, stride, bounding_values) \
2032 if ((uintptr_t)(ptr) & 7) \
2033 s->vp3dsp.name##_unaligned(ptr, stride, bounding_values); \
2035 s->vp3dsp.name(ptr, stride, bounding_values);
2038 safe_loop_filter(h_loop_filter, loop + loop_stride + x_offset + 1, loop_stride, bounding_values);
2041 safe_loop_filter(v_loop_filter, loop + (y_offset + 1)*loop_stride + 1, loop_stride, bounding_values);
2044 for (i = 0; i < 9; i++)
2045 memcpy(temp + i*stride, loop + (i + 1) * loop_stride + 1, 9);
2052 * Perform the final rendering for a particular slice of data.
2053 * The slice number ranges from 0..(c_superblock_height - 1).
2055 static void render_slice(Vp3DecodeContext *s, int slice)
2057 int x, y, i, j, fragment;
2058 int16_t *block = s->block;
2059 int motion_x = 0xdeadbeef, motion_y = 0xdeadbeef;
2060 int motion_halfpel_index;
2061 uint8_t *motion_source;
2062 int plane, first_pixel;
2064 if (slice >= s->c_superblock_height)
2067 for (plane = 0; plane < 3; plane++) {
2068 uint8_t *output_plane = s->current_frame.f->data[plane] +
2069 s->data_offset[plane];
2070 uint8_t *last_plane = s->last_frame.f->data[plane] +
2071 s->data_offset[plane];
2072 uint8_t *golden_plane = s->golden_frame.f->data[plane] +
2073 s->data_offset[plane];
2074 ptrdiff_t stride = s->current_frame.f->linesize[plane];
2075 int plane_width = s->width >> (plane && s->chroma_x_shift);
2076 int plane_height = s->height >> (plane && s->chroma_y_shift);
2077 int8_t(*motion_val)[2] = s->motion_val[!!plane];
2079 int sb_x, sb_y = slice << (!plane && s->chroma_y_shift);
2080 int slice_height = sb_y + 1 + (!plane && s->chroma_y_shift);
2081 int slice_width = plane ? s->c_superblock_width
2082 : s->y_superblock_width;
2084 int fragment_width = s->fragment_width[!!plane];
2085 int fragment_height = s->fragment_height[!!plane];
2086 int fragment_start = s->fragment_start[plane];
2088 int do_await = !plane && HAVE_THREADS &&
2089 (s->avctx->active_thread_type & FF_THREAD_FRAME);
2091 if (!s->flipped_image)
2093 if (CONFIG_GRAY && plane && (s->avctx->flags & AV_CODEC_FLAG_GRAY))
2096 /* for each superblock row in the slice (both of them)... */
2097 for (; sb_y < slice_height; sb_y++) {
2098 /* for each superblock in a row... */
2099 for (sb_x = 0; sb_x < slice_width; sb_x++) {
2100 /* for each block in a superblock... */
2101 for (j = 0; j < 16; j++) {
2102 x = 4 * sb_x + hilbert_offset[j][0];
2103 y = 4 * sb_y + hilbert_offset[j][1];
2104 fragment = y * fragment_width + x;
2106 i = fragment_start + fragment;
2109 if (x >= fragment_width || y >= fragment_height)
2112 first_pixel = 8 * y * stride + 8 * x;
2115 s->all_fragments[i].coding_method != MODE_INTRA)
2116 await_reference_row(s, &s->all_fragments[i],
2117 motion_val[fragment][1],
2118 (16 * y) >> s->chroma_y_shift);
2120 /* transform if this block was coded */
2121 if (s->all_fragments[i].coding_method != MODE_COPY) {
2122 if ((s->all_fragments[i].coding_method == MODE_USING_GOLDEN) ||
2123 (s->all_fragments[i].coding_method == MODE_GOLDEN_MV))
2124 motion_source = golden_plane;
2126 motion_source = last_plane;
2128 motion_source += first_pixel;
2129 motion_halfpel_index = 0;
2131 /* sort out the motion vector if this fragment is coded
2132 * using a motion vector method */
2133 if ((s->all_fragments[i].coding_method > MODE_INTRA) &&
2134 (s->all_fragments[i].coding_method != MODE_USING_GOLDEN)) {
2136 int standard_mc = 1;
2137 motion_x = motion_val[fragment][0];
2138 motion_y = motion_val[fragment][1];
2139 #if CONFIG_VP4_DECODER
2140 if (plane && s->version >= 2) {
2141 motion_x = (motion_x >> 1) | (motion_x & 1);
2142 motion_y = (motion_y >> 1) | (motion_y & 1);
2146 src_x = (motion_x >> 1) + 8 * x;
2147 src_y = (motion_y >> 1) + 8 * y;
2149 motion_halfpel_index = motion_x & 0x01;
2150 motion_source += (motion_x >> 1);
2152 motion_halfpel_index |= (motion_y & 0x01) << 1;
2153 motion_source += ((motion_y >> 1) * stride);
2155 #if CONFIG_VP4_DECODER
2156 if (s->version >= 2) {
2157 uint8_t *temp = s->edge_emu_buffer;
2160 if (vp4_mc_loop_filter(s, plane, motion_val[fragment][0], motion_val[fragment][1], x, y, motion_source, stride, src_x, src_y, temp)) {
2161 motion_source = temp;
2167 if (standard_mc && (
2168 src_x < 0 || src_y < 0 ||
2169 src_x + 9 >= plane_width ||
2170 src_y + 9 >= plane_height)) {
2171 uint8_t *temp = s->edge_emu_buffer;
2175 s->vdsp.emulated_edge_mc(temp, motion_source,
2180 motion_source = temp;
2184 /* first, take care of copying a block from either the
2185 * previous or the golden frame */
2186 if (s->all_fragments[i].coding_method != MODE_INTRA) {
2187 /* Note, it is possible to implement all MC cases
2188 * with put_no_rnd_pixels_l2 which would look more
2189 * like the VP3 source but this would be slower as
2190 * put_no_rnd_pixels_tab is better optimized */
2191 if (motion_halfpel_index != 3) {
2192 s->hdsp.put_no_rnd_pixels_tab[1][motion_halfpel_index](
2193 output_plane + first_pixel,
2194 motion_source, stride, 8);
2196 /* d is 0 if motion_x and _y have the same sign,
2198 int d = (motion_x ^ motion_y) >> 31;
2199 s->vp3dsp.put_no_rnd_pixels_l2(output_plane + first_pixel,
2201 motion_source + stride + 1 + d,
2206 /* invert DCT and place (or add) in final output */
2208 if (s->all_fragments[i].coding_method == MODE_INTRA) {
2209 vp3_dequant(s, s->all_fragments + i,
2211 s->vp3dsp.idct_put(output_plane + first_pixel,
2215 if (vp3_dequant(s, s->all_fragments + i,
2217 s->vp3dsp.idct_add(output_plane + first_pixel,
2221 s->vp3dsp.idct_dc_add(output_plane + first_pixel,
2226 /* copy directly from the previous frame */
2227 s->hdsp.put_pixels_tab[1][0](
2228 output_plane + first_pixel,
2229 last_plane + first_pixel,
2235 // Filter up to the last row in the superblock row
2236 if (s->version < 2 && !s->skip_loop_filter)
2237 apply_loop_filter(s, plane, 4 * sb_y - !!sb_y,
2238 FFMIN(4 * sb_y + 3, fragment_height - 1));
2242 /* this looks like a good place for slice dispatch... */
2244 * if (slice == s->macroblock_height - 1)
2245 * dispatch (both last slice & 2nd-to-last slice);
2246 * else if (slice > 0)
2247 * dispatch (slice - 1);
2250 vp3_draw_horiz_band(s, FFMIN((32 << s->chroma_y_shift) * (slice + 1) - 16,
2254 /// Allocate tables for per-frame data in Vp3DecodeContext
2255 static av_cold int allocate_tables(AVCodecContext *avctx)
2257 Vp3DecodeContext *s = avctx->priv_data;
2258 int y_fragment_count, c_fragment_count;
2262 y_fragment_count = s->fragment_width[0] * s->fragment_height[0];
2263 c_fragment_count = s->fragment_width[1] * s->fragment_height[1];
2265 /* superblock_coding is used by unpack_superblocks (VP3/Theora) and vp4_unpack_macroblocks (VP4) */
2266 s->superblock_coding = av_mallocz(FFMAX(s->superblock_count, s->yuv_macroblock_count));
2267 s->all_fragments = av_mallocz_array(s->fragment_count, sizeof(Vp3Fragment));
2269 s-> kf_coded_fragment_list = av_mallocz_array(s->fragment_count, sizeof(int));
2270 s->nkf_coded_fragment_list = av_mallocz_array(s->fragment_count, sizeof(int));
2271 memset(s-> num_kf_coded_fragment, -1, sizeof(s-> num_kf_coded_fragment));
2273 s->dct_tokens_base = av_mallocz_array(s->fragment_count,
2274 64 * sizeof(*s->dct_tokens_base));
2275 s->motion_val[0] = av_mallocz_array(y_fragment_count, sizeof(*s->motion_val[0]));
2276 s->motion_val[1] = av_mallocz_array(c_fragment_count, sizeof(*s->motion_val[1]));
2278 /* work out the block mapping tables */
2279 s->superblock_fragments = av_mallocz_array(s->superblock_count, 16 * sizeof(int));
2280 s->macroblock_coding = av_mallocz(s->macroblock_count + 1);
2282 s->dc_pred_row = av_malloc_array(s->y_superblock_width * 4, sizeof(*s->dc_pred_row));
2284 if (!s->superblock_coding || !s->all_fragments ||
2285 !s->dct_tokens_base || !s->kf_coded_fragment_list ||
2286 !s->nkf_coded_fragment_list ||
2287 !s->superblock_fragments || !s->macroblock_coding ||
2289 !s->motion_val[0] || !s->motion_val[1]) {
2290 vp3_decode_end(avctx);
2294 init_block_mapping(s);
2299 static av_cold int init_frames(Vp3DecodeContext *s)
2301 s->current_frame.f = av_frame_alloc();
2302 s->last_frame.f = av_frame_alloc();
2303 s->golden_frame.f = av_frame_alloc();
2305 if (!s->current_frame.f || !s->last_frame.f || !s->golden_frame.f) {
2306 av_frame_free(&s->current_frame.f);
2307 av_frame_free(&s->last_frame.f);
2308 av_frame_free(&s->golden_frame.f);
2309 return AVERROR(ENOMEM);
2315 static av_cold int vp3_decode_init(AVCodecContext *avctx)
2317 Vp3DecodeContext *s = avctx->priv_data;
2318 int i, inter, plane, ret;
2321 int y_fragment_count, c_fragment_count;
2322 #if CONFIG_VP4_DECODER
2326 ret = init_frames(s);
2330 if (avctx->codec_tag == MKTAG('V', 'P', '4', '0'))
2332 else if (avctx->codec_tag == MKTAG('V', 'P', '3', '0'))
2338 s->width = FFALIGN(avctx->coded_width, 16);
2339 s->height = FFALIGN(avctx->coded_height, 16);
2340 if (avctx->codec_id != AV_CODEC_ID_THEORA)
2341 avctx->pix_fmt = AV_PIX_FMT_YUV420P;
2342 avctx->chroma_sample_location = AVCHROMA_LOC_CENTER;
2343 ff_hpeldsp_init(&s->hdsp, avctx->flags | AV_CODEC_FLAG_BITEXACT);
2344 ff_videodsp_init(&s->vdsp, 8);
2345 ff_vp3dsp_init(&s->vp3dsp, avctx->flags);
2347 for (i = 0; i < 64; i++) {
2348 #define TRANSPOSE(x) (((x) >> 3) | (((x) & 7) << 3))
2349 s->idct_permutation[i] = TRANSPOSE(i);
2350 s->idct_scantable[i] = TRANSPOSE(ff_zigzag_direct[i]);
2354 /* initialize to an impossible value which will force a recalculation
2355 * in the first frame decode */
2356 for (i = 0; i < 3; i++)
2359 ret = av_pix_fmt_get_chroma_sub_sample(avctx->pix_fmt, &s->chroma_x_shift, &s->chroma_y_shift);
2363 s->y_superblock_width = (s->width + 31) / 32;
2364 s->y_superblock_height = (s->height + 31) / 32;
2365 s->y_superblock_count = s->y_superblock_width * s->y_superblock_height;
2367 /* work out the dimensions for the C planes */
2368 c_width = s->width >> s->chroma_x_shift;
2369 c_height = s->height >> s->chroma_y_shift;
2370 s->c_superblock_width = (c_width + 31) / 32;
2371 s->c_superblock_height = (c_height + 31) / 32;
2372 s->c_superblock_count = s->c_superblock_width * s->c_superblock_height;
2374 s->superblock_count = s->y_superblock_count + (s->c_superblock_count * 2);
2375 s->u_superblock_start = s->y_superblock_count;
2376 s->v_superblock_start = s->u_superblock_start + s->c_superblock_count;
2378 s->macroblock_width = (s->width + 15) / 16;
2379 s->macroblock_height = (s->height + 15) / 16;
2380 s->macroblock_count = s->macroblock_width * s->macroblock_height;
2381 s->c_macroblock_width = (c_width + 15) / 16;
2382 s->c_macroblock_height = (c_height + 15) / 16;
2383 s->c_macroblock_count = s->c_macroblock_width * s->c_macroblock_height;
2384 s->yuv_macroblock_count = s->macroblock_count + 2 * s->c_macroblock_count;
2386 s->fragment_width[0] = s->width / FRAGMENT_PIXELS;
2387 s->fragment_height[0] = s->height / FRAGMENT_PIXELS;
2388 s->fragment_width[1] = s->fragment_width[0] >> s->chroma_x_shift;
2389 s->fragment_height[1] = s->fragment_height[0] >> s->chroma_y_shift;
2391 /* fragment count covers all 8x8 blocks for all 3 planes */
2392 y_fragment_count = s->fragment_width[0] * s->fragment_height[0];
2393 c_fragment_count = s->fragment_width[1] * s->fragment_height[1];
2394 s->fragment_count = y_fragment_count + 2 * c_fragment_count;
2395 s->fragment_start[1] = y_fragment_count;
2396 s->fragment_start[2] = y_fragment_count + c_fragment_count;
2398 if (!s->theora_tables) {
2399 for (i = 0; i < 64; i++) {
2400 s->coded_dc_scale_factor[0][i] = s->version < 2 ? vp31_dc_scale_factor[i] : vp4_y_dc_scale_factor[i];
2401 s->coded_dc_scale_factor[1][i] = s->version < 2 ? vp31_dc_scale_factor[i] : vp4_uv_dc_scale_factor[i];
2402 s->coded_ac_scale_factor[i] = s->version < 2 ? vp31_ac_scale_factor[i] : vp4_ac_scale_factor[i];
2403 s->base_matrix[0][i] = s->version < 2 ? vp31_intra_y_dequant[i] : vp4_generic_dequant[i];
2404 s->base_matrix[1][i] = s->version < 2 ? vp31_intra_c_dequant[i] : vp4_generic_dequant[i];
2405 s->base_matrix[2][i] = s->version < 2 ? vp31_inter_dequant[i] : vp4_generic_dequant[i];
2406 s->filter_limit_values[i] = s->version < 2 ? vp31_filter_limit_values[i] : vp4_filter_limit_values[i];
2409 for (inter = 0; inter < 2; inter++) {
2410 for (plane = 0; plane < 3; plane++) {
2411 s->qr_count[inter][plane] = 1;
2412 s->qr_size[inter][plane][0] = 63;
2413 s->qr_base[inter][plane][0] =
2414 s->qr_base[inter][plane][1] = 2 * inter + (!!plane) * !inter;
2418 /* init VLC tables */
2419 if (s->version < 2) {
2420 for (i = 0; i < 16; i++) {
2422 init_vlc(&s->dc_vlc[i], 11, 32,
2423 &dc_bias[i][0][1], 4, 2,
2424 &dc_bias[i][0][0], 4, 2, 0);
2426 /* group 1 AC histograms */
2427 init_vlc(&s->ac_vlc_1[i], 11, 32,
2428 &ac_bias_0[i][0][1], 4, 2,
2429 &ac_bias_0[i][0][0], 4, 2, 0);
2431 /* group 2 AC histograms */
2432 init_vlc(&s->ac_vlc_2[i], 11, 32,
2433 &ac_bias_1[i][0][1], 4, 2,
2434 &ac_bias_1[i][0][0], 4, 2, 0);
2436 /* group 3 AC histograms */
2437 init_vlc(&s->ac_vlc_3[i], 11, 32,
2438 &ac_bias_2[i][0][1], 4, 2,
2439 &ac_bias_2[i][0][0], 4, 2, 0);
2441 /* group 4 AC histograms */
2442 init_vlc(&s->ac_vlc_4[i], 11, 32,
2443 &ac_bias_3[i][0][1], 4, 2,
2444 &ac_bias_3[i][0][0], 4, 2, 0);
2446 #if CONFIG_VP4_DECODER
2447 } else { /* version >= 2 */
2448 for (i = 0; i < 16; i++) {
2450 init_vlc(&s->dc_vlc[i], 11, 32,
2451 &vp4_dc_bias[i][0][1], 4, 2,
2452 &vp4_dc_bias[i][0][0], 4, 2, 0);
2454 /* group 1 AC histograms */
2455 init_vlc(&s->ac_vlc_1[i], 11, 32,
2456 &vp4_ac_bias_0[i][0][1], 4, 2,
2457 &vp4_ac_bias_0[i][0][0], 4, 2, 0);
2459 /* group 2 AC histograms */
2460 init_vlc(&s->ac_vlc_2[i], 11, 32,
2461 &vp4_ac_bias_1[i][0][1], 4, 2,
2462 &vp4_ac_bias_1[i][0][0], 4, 2, 0);
2464 /* group 3 AC histograms */
2465 init_vlc(&s->ac_vlc_3[i], 11, 32,
2466 &vp4_ac_bias_2[i][0][1], 4, 2,
2467 &vp4_ac_bias_2[i][0][0], 4, 2, 0);
2469 /* group 4 AC histograms */
2470 init_vlc(&s->ac_vlc_4[i], 11, 32,
2471 &vp4_ac_bias_3[i][0][1], 4, 2,
2472 &vp4_ac_bias_3[i][0][0], 4, 2, 0);
2477 for (i = 0; i < 16; i++) {
2479 if (init_vlc(&s->dc_vlc[i], 11, 32,
2480 &s->huffman_table[i][0][1], 8, 4,
2481 &s->huffman_table[i][0][0], 8, 4, 0) < 0)
2484 /* group 1 AC histograms */
2485 if (init_vlc(&s->ac_vlc_1[i], 11, 32,
2486 &s->huffman_table[i + 16][0][1], 8, 4,
2487 &s->huffman_table[i + 16][0][0], 8, 4, 0) < 0)
2490 /* group 2 AC histograms */
2491 if (init_vlc(&s->ac_vlc_2[i], 11, 32,
2492 &s->huffman_table[i + 16 * 2][0][1], 8, 4,
2493 &s->huffman_table[i + 16 * 2][0][0], 8, 4, 0) < 0)
2496 /* group 3 AC histograms */
2497 if (init_vlc(&s->ac_vlc_3[i], 11, 32,
2498 &s->huffman_table[i + 16 * 3][0][1], 8, 4,
2499 &s->huffman_table[i + 16 * 3][0][0], 8, 4, 0) < 0)
2502 /* group 4 AC histograms */
2503 if (init_vlc(&s->ac_vlc_4[i], 11, 32,
2504 &s->huffman_table[i + 16 * 4][0][1], 8, 4,
2505 &s->huffman_table[i + 16 * 4][0][0], 8, 4, 0) < 0)
2510 init_vlc(&s->superblock_run_length_vlc, 6, 34,
2511 &superblock_run_length_vlc_table[0][1], 4, 2,
2512 &superblock_run_length_vlc_table[0][0], 4, 2, 0);
2514 init_vlc(&s->fragment_run_length_vlc, 5, 30,
2515 &fragment_run_length_vlc_table[0][1], 4, 2,
2516 &fragment_run_length_vlc_table[0][0], 4, 2, 0);
2518 init_vlc(&s->mode_code_vlc, 3, 8,
2519 &mode_code_vlc_table[0][1], 2, 1,
2520 &mode_code_vlc_table[0][0], 2, 1, 0);
2522 init_vlc(&s->motion_vector_vlc, 6, 63,
2523 &motion_vector_vlc_table[0][1], 2, 1,
2524 &motion_vector_vlc_table[0][0], 2, 1, 0);
2526 #if CONFIG_VP4_DECODER
2527 for (j = 0; j < 2; j++)
2528 for (i = 0; i < 7; i++)
2529 init_vlc(&s->vp4_mv_vlc[j][i], 6, 63,
2530 &vp4_mv_vlc[j][i][0][1], 4, 2,
2531 &vp4_mv_vlc[j][i][0][0], 4, 2, 0);
2534 for (i = 0; i < 2; i++)
2535 init_vlc(&s->block_pattern_vlc[i], 3, 14,
2536 &vp4_block_pattern_vlc[i][0][1], 2, 1,
2537 &vp4_block_pattern_vlc[i][0][0], 2, 1, 0);
2540 return allocate_tables(avctx);
2543 av_log(avctx, AV_LOG_FATAL, "Invalid huffman table\n");
2547 /// Release and shuffle frames after decode finishes
2548 static int update_frames(AVCodecContext *avctx)
2550 Vp3DecodeContext *s = avctx->priv_data;
2553 /* shuffle frames (last = current) */
2554 ff_thread_release_buffer(avctx, &s->last_frame);
2555 ret = ff_thread_ref_frame(&s->last_frame, &s->current_frame);
2560 ff_thread_release_buffer(avctx, &s->golden_frame);
2561 ret = ff_thread_ref_frame(&s->golden_frame, &s->current_frame);
2565 ff_thread_release_buffer(avctx, &s->current_frame);
2570 static int ref_frame(Vp3DecodeContext *s, ThreadFrame *dst, ThreadFrame *src)
2572 ff_thread_release_buffer(s->avctx, dst);
2573 if (src->f->data[0])
2574 return ff_thread_ref_frame(dst, src);
2578 static int ref_frames(Vp3DecodeContext *dst, Vp3DecodeContext *src)
2581 if ((ret = ref_frame(dst, &dst->current_frame, &src->current_frame)) < 0 ||
2582 (ret = ref_frame(dst, &dst->golden_frame, &src->golden_frame)) < 0 ||
2583 (ret = ref_frame(dst, &dst->last_frame, &src->last_frame)) < 0)
2588 static int vp3_update_thread_context(AVCodecContext *dst, const AVCodecContext *src)
2590 Vp3DecodeContext *s = dst->priv_data, *s1 = src->priv_data;
2591 int qps_changed = 0, i, err;
2593 if (!s1->current_frame.f->data[0] ||
2594 s->width != s1->width || s->height != s1->height) {
2601 // copy previous frame data
2602 if ((err = ref_frames(s, s1)) < 0)
2605 s->keyframe = s1->keyframe;
2607 // copy qscale data if necessary
2608 for (i = 0; i < 3; i++) {
2609 if (s->qps[i] != s1->qps[1]) {
2611 memcpy(&s->qmat[i], &s1->qmat[i], sizeof(s->qmat[i]));
2615 if (s->qps[0] != s1->qps[0])
2616 memcpy(&s->bounding_values_array, &s1->bounding_values_array,
2617 sizeof(s->bounding_values_array));
2620 memcpy(s->qps, s1->qps, sizeof(s->qps));
2621 memcpy(s->last_qps, s1->last_qps, sizeof(s->last_qps));
2626 return update_frames(dst);
2630 static int vp3_decode_frame(AVCodecContext *avctx,
2631 void *data, int *got_frame,
2634 AVFrame *frame = data;
2635 const uint8_t *buf = avpkt->data;
2636 int buf_size = avpkt->size;
2637 Vp3DecodeContext *s = avctx->priv_data;
2641 if ((ret = init_get_bits8(&gb, buf, buf_size)) < 0)
2644 #if CONFIG_THEORA_DECODER
2645 if (s->theora && get_bits1(&gb)) {
2646 int type = get_bits(&gb, 7);
2647 skip_bits_long(&gb, 6*8); /* "theora" */
2649 if (s->avctx->active_thread_type&FF_THREAD_FRAME) {
2650 av_log(avctx, AV_LOG_ERROR, "midstream reconfiguration with multithreading is unsupported, try -threads 1\n");
2651 return AVERROR_PATCHWELCOME;
2654 vp3_decode_end(avctx);
2655 ret = theora_decode_header(avctx, &gb);
2658 ret = vp3_decode_init(avctx);
2660 vp3_decode_end(avctx);
2664 } else if (type == 2) {
2665 vp3_decode_end(avctx);
2666 ret = theora_decode_tables(avctx, &gb);
2668 ret = vp3_decode_init(avctx);
2670 vp3_decode_end(avctx);
2676 av_log(avctx, AV_LOG_ERROR,
2677 "Header packet passed to frame decoder, skipping\n");
2682 s->keyframe = !get_bits1(&gb);
2683 if (!s->all_fragments) {
2684 av_log(avctx, AV_LOG_ERROR, "Data packet without prior valid headers\n");
2689 for (i = 0; i < 3; i++)
2690 s->last_qps[i] = s->qps[i];
2694 s->qps[s->nqps++] = get_bits(&gb, 6);
2695 } while (s->theora >= 0x030200 && s->nqps < 3 && get_bits1(&gb));
2696 for (i = s->nqps; i < 3; i++)
2699 if (s->avctx->debug & FF_DEBUG_PICT_INFO)
2700 av_log(s->avctx, AV_LOG_INFO, " VP3 %sframe #%d: Q index = %d\n",
2701 s->keyframe ? "key" : "", avctx->frame_number + 1, s->qps[0]);
2703 s->skip_loop_filter = !s->filter_limit_values[s->qps[0]] ||
2704 avctx->skip_loop_filter >= (s->keyframe ? AVDISCARD_ALL
2705 : AVDISCARD_NONKEY);
2707 if (s->qps[0] != s->last_qps[0])
2708 init_loop_filter(s);
2710 for (i = 0; i < s->nqps; i++)
2711 // reinit all dequantizers if the first one changed, because
2712 // the DC of the first quantizer must be used for all matrices
2713 if (s->qps[i] != s->last_qps[i] || s->qps[0] != s->last_qps[0])
2714 init_dequantizer(s, i);
2716 if (avctx->skip_frame >= AVDISCARD_NONKEY && !s->keyframe)
2719 s->current_frame.f->pict_type = s->keyframe ? AV_PICTURE_TYPE_I
2720 : AV_PICTURE_TYPE_P;
2721 s->current_frame.f->key_frame = s->keyframe;
2722 if ((ret = ff_thread_get_buffer(avctx, &s->current_frame, AV_GET_BUFFER_FLAG_REF)) < 0)
2725 if (!s->edge_emu_buffer)
2726 s->edge_emu_buffer = av_malloc(9 * FFABS(s->current_frame.f->linesize[0]));
2730 skip_bits(&gb, 4); /* width code */
2731 skip_bits(&gb, 4); /* height code */
2733 s->version = get_bits(&gb, 5);
2734 if (avctx->frame_number == 0)
2735 av_log(s->avctx, AV_LOG_DEBUG,
2736 "VP version: %d\n", s->version);
2739 if (s->version || s->theora) {
2741 av_log(s->avctx, AV_LOG_ERROR,
2742 "Warning, unsupported keyframe coding type?!\n");
2743 skip_bits(&gb, 2); /* reserved? */
2745 #if CONFIG_VP4_DECODER
2746 if (s->version >= 2) {
2747 int mb_height, mb_width;
2748 int mb_width_mul, mb_width_div, mb_height_mul, mb_height_div;
2750 mb_height = get_bits(&gb, 8);
2751 mb_width = get_bits(&gb, 8);
2752 if (mb_height != s->macroblock_height ||
2753 mb_width != s->macroblock_width)
2754 avpriv_request_sample(s->avctx, "macroblock dimension mismatch");
2756 mb_width_mul = get_bits(&gb, 5);
2757 mb_width_div = get_bits(&gb, 3);
2758 mb_height_mul = get_bits(&gb, 5);
2759 mb_height_div = get_bits(&gb, 3);
2760 if (mb_width_mul != 1 || mb_width_div != 1 || mb_height_mul != 1 || mb_height_div != 1)
2761 avpriv_request_sample(s->avctx, "unexpected macroblock dimension multipler/divider");
2763 if (get_bits(&gb, 2))
2764 avpriv_request_sample(s->avctx, "unknown bits");
2769 if (!s->golden_frame.f->data[0]) {
2770 av_log(s->avctx, AV_LOG_WARNING,
2771 "vp3: first frame not a keyframe\n");
2773 s->golden_frame.f->pict_type = AV_PICTURE_TYPE_I;
2774 if ((ret = ff_thread_get_buffer(avctx, &s->golden_frame,
2775 AV_GET_BUFFER_FLAG_REF)) < 0)
2777 ff_thread_release_buffer(avctx, &s->last_frame);
2778 if ((ret = ff_thread_ref_frame(&s->last_frame,
2779 &s->golden_frame)) < 0)
2781 ff_thread_report_progress(&s->last_frame, INT_MAX, 0);
2785 memset(s->all_fragments, 0, s->fragment_count * sizeof(Vp3Fragment));
2786 ff_thread_finish_setup(avctx);
2788 if (s->version < 2) {
2789 if ((ret = unpack_superblocks(s, &gb)) < 0) {
2790 av_log(s->avctx, AV_LOG_ERROR, "error in unpack_superblocks\n");
2793 #if CONFIG_VP4_DECODER
2795 if ((ret = vp4_unpack_macroblocks(s, &gb)) < 0) {
2796 av_log(s->avctx, AV_LOG_ERROR, "error in vp4_unpack_macroblocks\n");
2801 if ((ret = unpack_modes(s, &gb)) < 0) {
2802 av_log(s->avctx, AV_LOG_ERROR, "error in unpack_modes\n");
2805 if (ret = unpack_vectors(s, &gb)) {
2806 av_log(s->avctx, AV_LOG_ERROR, "error in unpack_vectors\n");
2809 if ((ret = unpack_block_qpis(s, &gb)) < 0) {
2810 av_log(s->avctx, AV_LOG_ERROR, "error in unpack_block_qpis\n");
2814 if (s->version < 2) {
2815 if ((ret = unpack_dct_coeffs(s, &gb)) < 0) {
2816 av_log(s->avctx, AV_LOG_ERROR, "error in unpack_dct_coeffs\n");
2819 #if CONFIG_VP4_DECODER
2821 if ((ret = vp4_unpack_dct_coeffs(s, &gb)) < 0) {
2822 av_log(s->avctx, AV_LOG_ERROR, "error in vp4_unpack_dct_coeffs\n");
2828 for (i = 0; i < 3; i++) {
2829 int height = s->height >> (i && s->chroma_y_shift);
2830 if (s->flipped_image)
2831 s->data_offset[i] = 0;
2833 s->data_offset[i] = (height - 1) * s->current_frame.f->linesize[i];
2836 s->last_slice_end = 0;
2837 for (i = 0; i < s->c_superblock_height; i++)
2840 // filter the last row
2842 for (i = 0; i < 3; i++) {
2843 int row = (s->height >> (3 + (i && s->chroma_y_shift))) - 1;
2844 apply_loop_filter(s, i, row, row + 1);
2846 vp3_draw_horiz_band(s, s->height);
2848 /* output frame, offset as needed */
2849 if ((ret = av_frame_ref(data, s->current_frame.f)) < 0)
2852 frame->crop_left = s->offset_x;
2853 frame->crop_right = avctx->coded_width - avctx->width - s->offset_x;
2854 frame->crop_top = s->offset_y;
2855 frame->crop_bottom = avctx->coded_height - avctx->height - s->offset_y;
2859 if (!HAVE_THREADS || !(s->avctx->active_thread_type & FF_THREAD_FRAME)) {
2860 ret = update_frames(avctx);
2868 ff_thread_report_progress(&s->current_frame, INT_MAX, 0);
2870 if (!HAVE_THREADS || !(s->avctx->active_thread_type & FF_THREAD_FRAME))
2871 av_frame_unref(s->current_frame.f);
2876 static int read_huffman_tree(AVCodecContext *avctx, GetBitContext *gb)
2878 Vp3DecodeContext *s = avctx->priv_data;
2880 if (get_bits1(gb)) {
2882 if (s->entries >= 32) { /* overflow */
2883 av_log(avctx, AV_LOG_ERROR, "huffman tree overflow\n");
2886 token = get_bits(gb, 5);
2887 ff_dlog(avctx, "hti %d hbits %x token %d entry : %d size %d\n",
2888 s->hti, s->hbits, token, s->entries, s->huff_code_size);
2889 s->huffman_table[s->hti][token][0] = s->hbits;
2890 s->huffman_table[s->hti][token][1] = s->huff_code_size;
2893 if (s->huff_code_size >= 32) { /* overflow */
2894 av_log(avctx, AV_LOG_ERROR, "huffman tree overflow\n");
2897 s->huff_code_size++;
2899 if (read_huffman_tree(avctx, gb))
2902 if (read_huffman_tree(avctx, gb))
2905 s->huff_code_size--;
2910 #if CONFIG_THEORA_DECODER
2911 static const enum AVPixelFormat theora_pix_fmts[4] = {
2912 AV_PIX_FMT_YUV420P, AV_PIX_FMT_NONE, AV_PIX_FMT_YUV422P, AV_PIX_FMT_YUV444P
2915 static int theora_decode_header(AVCodecContext *avctx, GetBitContext *gb)
2917 Vp3DecodeContext *s = avctx->priv_data;
2918 int visible_width, visible_height, colorspace;
2919 uint8_t offset_x = 0, offset_y = 0;
2921 AVRational fps, aspect;
2923 s->theora_header = 0;
2924 s->theora = get_bits(gb, 24);
2925 av_log(avctx, AV_LOG_DEBUG, "Theora bitstream version %X\n", s->theora);
2928 avpriv_request_sample(s->avctx, "theora 0");
2931 /* 3.2.0 aka alpha3 has the same frame orientation as original vp3
2932 * but previous versions have the image flipped relative to vp3 */
2933 if (s->theora < 0x030200) {
2934 s->flipped_image = 1;
2935 av_log(avctx, AV_LOG_DEBUG,
2936 "Old (<alpha3) Theora bitstream, flipped image\n");
2940 s->width = get_bits(gb, 16) << 4;
2942 s->height = get_bits(gb, 16) << 4;
2944 if (s->theora >= 0x030200) {
2945 visible_width = get_bits(gb, 24);
2946 visible_height = get_bits(gb, 24);
2948 offset_x = get_bits(gb, 8); /* offset x */
2949 offset_y = get_bits(gb, 8); /* offset y, from bottom */
2953 if (av_image_check_size(visible_width, visible_height, 0, avctx) < 0 ||
2954 visible_width + offset_x > s->width ||
2955 visible_height + offset_y > s->height) {
2956 av_log(avctx, AV_LOG_ERROR,
2957 "Invalid frame dimensions - w:%d h:%d x:%d y:%d (%dx%d).\n",
2958 visible_width, visible_height, offset_x, offset_y,
2959 s->width, s->height);
2960 return AVERROR_INVALIDDATA;
2963 fps.num = get_bits_long(gb, 32);
2964 fps.den = get_bits_long(gb, 32);
2965 if (fps.num && fps.den) {
2966 if (fps.num < 0 || fps.den < 0) {
2967 av_log(avctx, AV_LOG_ERROR, "Invalid framerate\n");
2968 return AVERROR_INVALIDDATA;
2970 av_reduce(&avctx->framerate.den, &avctx->framerate.num,
2971 fps.den, fps.num, 1 << 30);
2974 aspect.num = get_bits(gb, 24);
2975 aspect.den = get_bits(gb, 24);
2976 if (aspect.num && aspect.den) {
2977 av_reduce(&avctx->sample_aspect_ratio.num,
2978 &avctx->sample_aspect_ratio.den,
2979 aspect.num, aspect.den, 1 << 30);
2980 ff_set_sar(avctx, avctx->sample_aspect_ratio);
2983 if (s->theora < 0x030200)
2984 skip_bits(gb, 5); /* keyframe frequency force */
2985 colorspace = get_bits(gb, 8);
2986 skip_bits(gb, 24); /* bitrate */
2988 skip_bits(gb, 6); /* quality hint */
2990 if (s->theora >= 0x030200) {
2991 skip_bits(gb, 5); /* keyframe frequency force */
2992 avctx->pix_fmt = theora_pix_fmts[get_bits(gb, 2)];
2993 if (avctx->pix_fmt == AV_PIX_FMT_NONE) {
2994 av_log(avctx, AV_LOG_ERROR, "Invalid pixel format\n");
2995 return AVERROR_INVALIDDATA;
2997 skip_bits(gb, 3); /* reserved */
2999 avctx->pix_fmt = AV_PIX_FMT_YUV420P;
3001 ret = ff_set_dimensions(avctx, s->width, s->height);
3004 if (!(avctx->flags2 & AV_CODEC_FLAG2_IGNORE_CROP)) {
3005 avctx->width = visible_width;
3006 avctx->height = visible_height;
3007 // translate offsets from theora axis ([0,0] lower left)
3008 // to normal axis ([0,0] upper left)
3009 s->offset_x = offset_x;
3010 s->offset_y = s->height - visible_height - offset_y;
3013 if (colorspace == 1)
3014 avctx->color_primaries = AVCOL_PRI_BT470M;
3015 else if (colorspace == 2)
3016 avctx->color_primaries = AVCOL_PRI_BT470BG;
3018 if (colorspace == 1 || colorspace == 2) {
3019 avctx->colorspace = AVCOL_SPC_BT470BG;
3020 avctx->color_trc = AVCOL_TRC_BT709;
3023 s->theora_header = 1;
3027 static int theora_decode_tables(AVCodecContext *avctx, GetBitContext *gb)
3029 Vp3DecodeContext *s = avctx->priv_data;
3030 int i, n, matrices, inter, plane;
3032 if (!s->theora_header)
3033 return AVERROR_INVALIDDATA;
3035 if (s->theora >= 0x030200) {
3036 n = get_bits(gb, 3);
3037 /* loop filter limit values table */
3039 for (i = 0; i < 64; i++)
3040 s->filter_limit_values[i] = get_bits(gb, n);
3043 if (s->theora >= 0x030200)
3044 n = get_bits(gb, 4) + 1;
3047 /* quality threshold table */
3048 for (i = 0; i < 64; i++)
3049 s->coded_ac_scale_factor[i] = get_bits(gb, n);
3051 if (s->theora >= 0x030200)
3052 n = get_bits(gb, 4) + 1;
3055 /* dc scale factor table */
3056 for (i = 0; i < 64; i++)
3057 s->coded_dc_scale_factor[0][i] =
3058 s->coded_dc_scale_factor[1][i] = get_bits(gb, n);
3060 if (s->theora >= 0x030200)
3061 matrices = get_bits(gb, 9) + 1;
3065 if (matrices > 384) {
3066 av_log(avctx, AV_LOG_ERROR, "invalid number of base matrixes\n");
3070 for (n = 0; n < matrices; n++)
3071 for (i = 0; i < 64; i++)
3072 s->base_matrix[n][i] = get_bits(gb, 8);
3074 for (inter = 0; inter <= 1; inter++) {
3075 for (plane = 0; plane <= 2; plane++) {
3077 if (inter || plane > 0)
3078 newqr = get_bits1(gb);
3081 if (inter && get_bits1(gb)) {
3085 qtj = (3 * inter + plane - 1) / 3;
3086 plj = (plane + 2) % 3;
3088 s->qr_count[inter][plane] = s->qr_count[qtj][plj];
3089 memcpy(s->qr_size[inter][plane], s->qr_size[qtj][plj],
3090 sizeof(s->qr_size[0][0]));
3091 memcpy(s->qr_base[inter][plane], s->qr_base[qtj][plj],
3092 sizeof(s->qr_base[0][0]));
3098 i = get_bits(gb, av_log2(matrices - 1) + 1);
3099 if (i >= matrices) {
3100 av_log(avctx, AV_LOG_ERROR,
3101 "invalid base matrix index\n");
3104 s->qr_base[inter][plane][qri] = i;
3107 i = get_bits(gb, av_log2(63 - qi) + 1) + 1;
3108 s->qr_size[inter][plane][qri++] = i;
3113 av_log(avctx, AV_LOG_ERROR, "invalid qi %d > 63\n", qi);
3116 s->qr_count[inter][plane] = qri;
3121 /* Huffman tables */
3122 for (s->hti = 0; s->hti < 80; s->hti++) {
3124 s->huff_code_size = 1;
3125 if (!get_bits1(gb)) {
3127 if (read_huffman_tree(avctx, gb))
3130 if (read_huffman_tree(avctx, gb))
3135 s->theora_tables = 1;
3140 static av_cold int theora_decode_init(AVCodecContext *avctx)
3142 Vp3DecodeContext *s = avctx->priv_data;
3145 const uint8_t *header_start[3];
3150 avctx->pix_fmt = AV_PIX_FMT_YUV420P;
3154 if (!avctx->extradata_size) {
3155 av_log(avctx, AV_LOG_ERROR, "Missing extradata!\n");
3159 if (avpriv_split_xiph_headers(avctx->extradata, avctx->extradata_size,
3160 42, header_start, header_len) < 0) {
3161 av_log(avctx, AV_LOG_ERROR, "Corrupt extradata\n");
3165 for (i = 0; i < 3; i++) {
3166 if (header_len[i] <= 0)
3168 ret = init_get_bits8(&gb, header_start[i], header_len[i]);
3172 ptype = get_bits(&gb, 8);
3174 if (!(ptype & 0x80)) {
3175 av_log(avctx, AV_LOG_ERROR, "Invalid extradata!\n");
3179 // FIXME: Check for this as well.
3180 skip_bits_long(&gb, 6 * 8); /* "theora" */
3184 if (theora_decode_header(avctx, &gb) < 0)
3188 // FIXME: is this needed? it breaks sometimes
3189 // theora_decode_comments(avctx, gb);
3192 if (theora_decode_tables(avctx, &gb))
3196 av_log(avctx, AV_LOG_ERROR,
3197 "Unknown Theora config packet: %d\n", ptype & ~0x80);
3200 if (ptype != 0x81 && 8 * header_len[i] != get_bits_count(&gb))
3201 av_log(avctx, AV_LOG_WARNING,
3202 "%d bits left in packet %X\n",
3203 8 * header_len[i] - get_bits_count(&gb), ptype);
3204 if (s->theora < 0x030200)
3208 return vp3_decode_init(avctx);
3211 AVCodec ff_theora_decoder = {
3213 .long_name = NULL_IF_CONFIG_SMALL("Theora"),
3214 .type = AVMEDIA_TYPE_VIDEO,
3215 .id = AV_CODEC_ID_THEORA,
3216 .priv_data_size = sizeof(Vp3DecodeContext),
3217 .init = theora_decode_init,
3218 .close = vp3_decode_end,
3219 .decode = vp3_decode_frame,
3220 .capabilities = AV_CODEC_CAP_DR1 | AV_CODEC_CAP_DRAW_HORIZ_BAND |
3221 AV_CODEC_CAP_FRAME_THREADS,
3222 .flush = vp3_decode_flush,
3223 .update_thread_context = ONLY_IF_THREADS_ENABLED(vp3_update_thread_context),
3224 .caps_internal = FF_CODEC_CAP_EXPORTS_CROPPING | FF_CODEC_CAP_ALLOCATE_PROGRESS,
3228 AVCodec ff_vp3_decoder = {
3230 .long_name = NULL_IF_CONFIG_SMALL("On2 VP3"),
3231 .type = AVMEDIA_TYPE_VIDEO,
3232 .id = AV_CODEC_ID_VP3,
3233 .priv_data_size = sizeof(Vp3DecodeContext),
3234 .init = vp3_decode_init,
3235 .close = vp3_decode_end,
3236 .decode = vp3_decode_frame,
3237 .capabilities = AV_CODEC_CAP_DR1 | AV_CODEC_CAP_DRAW_HORIZ_BAND |
3238 AV_CODEC_CAP_FRAME_THREADS,
3239 .flush = vp3_decode_flush,
3240 .update_thread_context = ONLY_IF_THREADS_ENABLED(vp3_update_thread_context),
3241 .caps_internal = FF_CODEC_CAP_ALLOCATE_PROGRESS,
3244 #if CONFIG_VP4_DECODER
3245 AVCodec ff_vp4_decoder = {
3247 .long_name = NULL_IF_CONFIG_SMALL("On2 VP4"),
3248 .type = AVMEDIA_TYPE_VIDEO,
3249 .id = AV_CODEC_ID_VP4,
3250 .priv_data_size = sizeof(Vp3DecodeContext),
3251 .init = vp3_decode_init,
3252 .close = vp3_decode_end,
3253 .decode = vp3_decode_frame,
3254 .capabilities = AV_CODEC_CAP_DR1 | AV_CODEC_CAP_DRAW_HORIZ_BAND |
3255 AV_CODEC_CAP_FRAME_THREADS,
3256 .flush = vp3_decode_flush,
3257 .update_thread_context = ONLY_IF_THREADS_ENABLED(vp3_update_thread_context),
3258 .caps_internal = FF_CODEC_CAP_ALLOCATE_PROGRESS,