2 * Copyright (C) 2003-2004 the ffmpeg project
4 * This file is part of FFmpeg.
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.
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.
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
23 * On2 VP3 Video Decoder
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
29 * Theora decoder by Alex Beregszaszi
36 #include "libavutil/imgutils.h"
46 #define FRAGMENT_PIXELS 8
48 //FIXME split things out into their own arrays
49 typedef struct Vp3Fragment {
51 uint8_t coding_method;
55 #define SB_NOT_CODED 0
56 #define SB_PARTIALLY_CODED 1
57 #define SB_FULLY_CODED 2
59 // This is the maximum length of a single long bit run that can be encoded
60 // for superblock coding or block qps. Theora special-cases this to read a
61 // bit instead of flipping the current bit to allow for runs longer than 4129.
62 #define MAXIMUM_LONG_BIT_RUN 4129
64 #define MODE_INTER_NO_MV 0
66 #define MODE_INTER_PLUS_MV 2
67 #define MODE_INTER_LAST_MV 3
68 #define MODE_INTER_PRIOR_LAST 4
69 #define MODE_USING_GOLDEN 5
70 #define MODE_GOLDEN_MV 6
71 #define MODE_INTER_FOURMV 7
72 #define CODING_MODE_COUNT 8
74 /* special internal mode */
77 /* There are 6 preset schemes, plus a free-form scheme */
78 static const int ModeAlphabet[6][CODING_MODE_COUNT] =
80 /* scheme 1: Last motion vector dominates */
81 { MODE_INTER_LAST_MV, MODE_INTER_PRIOR_LAST,
82 MODE_INTER_PLUS_MV, MODE_INTER_NO_MV,
83 MODE_INTRA, MODE_USING_GOLDEN,
84 MODE_GOLDEN_MV, MODE_INTER_FOURMV },
87 { MODE_INTER_LAST_MV, MODE_INTER_PRIOR_LAST,
88 MODE_INTER_NO_MV, MODE_INTER_PLUS_MV,
89 MODE_INTRA, MODE_USING_GOLDEN,
90 MODE_GOLDEN_MV, MODE_INTER_FOURMV },
93 { MODE_INTER_LAST_MV, MODE_INTER_PLUS_MV,
94 MODE_INTER_PRIOR_LAST, MODE_INTER_NO_MV,
95 MODE_INTRA, MODE_USING_GOLDEN,
96 MODE_GOLDEN_MV, MODE_INTER_FOURMV },
99 { MODE_INTER_LAST_MV, MODE_INTER_PLUS_MV,
100 MODE_INTER_NO_MV, MODE_INTER_PRIOR_LAST,
101 MODE_INTRA, MODE_USING_GOLDEN,
102 MODE_GOLDEN_MV, MODE_INTER_FOURMV },
104 /* scheme 5: No motion vector dominates */
105 { MODE_INTER_NO_MV, MODE_INTER_LAST_MV,
106 MODE_INTER_PRIOR_LAST, MODE_INTER_PLUS_MV,
107 MODE_INTRA, MODE_USING_GOLDEN,
108 MODE_GOLDEN_MV, MODE_INTER_FOURMV },
111 { MODE_INTER_NO_MV, MODE_USING_GOLDEN,
112 MODE_INTER_LAST_MV, MODE_INTER_PRIOR_LAST,
113 MODE_INTER_PLUS_MV, MODE_INTRA,
114 MODE_GOLDEN_MV, MODE_INTER_FOURMV },
118 static const uint8_t hilbert_offset[16][2] = {
119 {0,0}, {1,0}, {1,1}, {0,1},
120 {0,2}, {0,3}, {1,3}, {1,2},
121 {2,2}, {2,3}, {3,3}, {3,2},
122 {3,1}, {2,1}, {2,0}, {3,0}
125 #define MIN_DEQUANT_VAL 2
127 typedef struct Vp3DecodeContext {
128 AVCodecContext *avctx;
129 int theora, theora_tables;
132 int chroma_x_shift, chroma_y_shift;
133 AVFrame golden_frame;
135 AVFrame current_frame;
140 int skip_loop_filter;
146 int superblock_count;
147 int y_superblock_width;
148 int y_superblock_height;
149 int y_superblock_count;
150 int c_superblock_width;
151 int c_superblock_height;
152 int c_superblock_count;
153 int u_superblock_start;
154 int v_superblock_start;
155 unsigned char *superblock_coding;
157 int macroblock_count;
158 int macroblock_width;
159 int macroblock_height;
162 int fragment_width[2];
163 int fragment_height[2];
165 Vp3Fragment *all_fragments;
166 int fragment_start[3];
169 int8_t (*motion_val[2])[2];
174 uint16_t coded_dc_scale_factor[64];
175 uint32_t coded_ac_scale_factor[64];
176 uint8_t base_matrix[384][64];
177 uint8_t qr_count[2][3];
178 uint8_t qr_size [2][3][64];
179 uint16_t qr_base[2][3][64];
182 * This is a list of all tokens in bitstream order. Reordering takes place
183 * by pulling from each level during IDCT. As a consequence, IDCT must be
184 * in Hilbert order, making the minimum slice height 64 for 4:2:0 and 32
185 * otherwise. The 32 different tokens with up to 12 bits of extradata are
186 * collapsed into 3 types, packed as follows:
187 * (from the low to high bits)
189 * 2 bits: type (0,1,2)
190 * 0: EOB run, 14 bits for run length (12 needed)
191 * 1: zero run, 7 bits for run length
192 * 7 bits for the next coefficient (3 needed)
193 * 2: coefficient, 14 bits (11 needed)
195 * Coefficients are signed, so are packed in the highest bits for automatic
198 int16_t *dct_tokens[3][64];
199 int16_t *dct_tokens_base;
200 #define TOKEN_EOB(eob_run) ((eob_run) << 2)
201 #define TOKEN_ZERO_RUN(coeff, zero_run) (((coeff) << 9) + ((zero_run) << 2) + 1)
202 #define TOKEN_COEFF(coeff) (((coeff) << 2) + 2)
205 * number of blocks that contain DCT coefficients at the given level or higher
207 int num_coded_frags[3][64];
208 int total_num_coded_frags;
210 /* this is a list of indexes into the all_fragments array indicating
211 * which of the fragments are coded */
212 int *coded_fragment_list[3];
220 VLC superblock_run_length_vlc;
221 VLC fragment_run_length_vlc;
223 VLC motion_vector_vlc;
225 /* these arrays need to be on 16-byte boundaries since SSE2 operations
227 DECLARE_ALIGNED(16, int16_t, qmat)[3][2][3][64]; ///< qmat[qpi][is_inter][plane]
229 /* This table contains superblock_count * 16 entries. Each set of 16
230 * numbers corresponds to the fragment indexes 0..15 of the superblock.
231 * An entry will be -1 to indicate that no entry corresponds to that
233 int *superblock_fragments;
235 /* This is an array that indicates how a particular macroblock
237 unsigned char *macroblock_coding;
239 uint8_t *edge_emu_buffer;
246 uint32_t huffman_table[80][32][2];
248 uint8_t filter_limit_values[64];
249 DECLARE_ALIGNED(8, int, bounding_values_array)[256+2];
252 /************************************************************************
253 * VP3 specific functions
254 ************************************************************************/
256 static void vp3_decode_flush(AVCodecContext *avctx)
258 Vp3DecodeContext *s = avctx->priv_data;
260 if (s->golden_frame.data[0]) {
261 if (s->golden_frame.data[0] == s->last_frame.data[0])
262 memset(&s->last_frame, 0, sizeof(AVFrame));
263 if (s->current_frame.data[0] == s->golden_frame.data[0])
264 memset(&s->current_frame, 0, sizeof(AVFrame));
265 ff_thread_release_buffer(avctx, &s->golden_frame);
267 if (s->last_frame.data[0]) {
268 if (s->current_frame.data[0] == s->last_frame.data[0])
269 memset(&s->current_frame, 0, sizeof(AVFrame));
270 ff_thread_release_buffer(avctx, &s->last_frame);
272 if (s->current_frame.data[0])
273 ff_thread_release_buffer(avctx, &s->current_frame);
276 static av_cold int vp3_decode_end(AVCodecContext *avctx)
278 Vp3DecodeContext *s = avctx->priv_data;
281 av_free(s->superblock_coding);
282 av_free(s->all_fragments);
283 av_free(s->coded_fragment_list[0]);
284 av_free(s->dct_tokens_base);
285 av_free(s->superblock_fragments);
286 av_free(s->macroblock_coding);
287 av_free(s->motion_val[0]);
288 av_free(s->motion_val[1]);
289 av_free(s->edge_emu_buffer);
291 if (avctx->internal->is_copy)
294 for (i = 0; i < 16; i++) {
295 ff_free_vlc(&s->dc_vlc[i]);
296 ff_free_vlc(&s->ac_vlc_1[i]);
297 ff_free_vlc(&s->ac_vlc_2[i]);
298 ff_free_vlc(&s->ac_vlc_3[i]);
299 ff_free_vlc(&s->ac_vlc_4[i]);
302 ff_free_vlc(&s->superblock_run_length_vlc);
303 ff_free_vlc(&s->fragment_run_length_vlc);
304 ff_free_vlc(&s->mode_code_vlc);
305 ff_free_vlc(&s->motion_vector_vlc);
307 /* release all frames */
308 vp3_decode_flush(avctx);
314 * This function sets up all of the various blocks mappings:
315 * superblocks <-> fragments, macroblocks <-> fragments,
316 * superblocks <-> macroblocks
318 * @return 0 is successful; returns 1 if *anything* went wrong.
320 static int init_block_mapping(Vp3DecodeContext *s)
322 int sb_x, sb_y, plane;
325 for (plane = 0; plane < 3; plane++) {
326 int sb_width = plane ? s->c_superblock_width : s->y_superblock_width;
327 int sb_height = plane ? s->c_superblock_height : s->y_superblock_height;
328 int frag_width = s->fragment_width[!!plane];
329 int frag_height = s->fragment_height[!!plane];
331 for (sb_y = 0; sb_y < sb_height; sb_y++)
332 for (sb_x = 0; sb_x < sb_width; sb_x++)
333 for (i = 0; i < 16; i++) {
334 x = 4*sb_x + hilbert_offset[i][0];
335 y = 4*sb_y + hilbert_offset[i][1];
337 if (x < frag_width && y < frag_height)
338 s->superblock_fragments[j++] = s->fragment_start[plane] + y*frag_width + x;
340 s->superblock_fragments[j++] = -1;
344 return 0; /* successful path out */
348 * This function sets up the dequantization tables used for a particular
351 static void init_dequantizer(Vp3DecodeContext *s, int qpi)
353 int ac_scale_factor = s->coded_ac_scale_factor[s->qps[qpi]];
354 int dc_scale_factor = s->coded_dc_scale_factor[s->qps[qpi]];
355 int i, plane, inter, qri, bmi, bmj, qistart;
357 for(inter=0; inter<2; inter++){
358 for(plane=0; plane<3; plane++){
360 for(qri=0; qri<s->qr_count[inter][plane]; qri++){
361 sum+= s->qr_size[inter][plane][qri];
362 if(s->qps[qpi] <= sum)
365 qistart= sum - s->qr_size[inter][plane][qri];
366 bmi= s->qr_base[inter][plane][qri ];
367 bmj= s->qr_base[inter][plane][qri+1];
369 int coeff= ( 2*(sum -s->qps[qpi])*s->base_matrix[bmi][i]
370 - 2*(qistart-s->qps[qpi])*s->base_matrix[bmj][i]
371 + s->qr_size[inter][plane][qri])
372 / (2*s->qr_size[inter][plane][qri]);
374 int qmin= 8<<(inter + !i);
375 int qscale= i ? ac_scale_factor : dc_scale_factor;
377 s->qmat[qpi][inter][plane][s->dsp.idct_permutation[i]]= av_clip((qscale * coeff)/100 * 4, qmin, 4096);
379 // all DC coefficients use the same quant so as not to interfere with DC prediction
380 s->qmat[qpi][inter][plane][0] = s->qmat[0][inter][plane][0];
386 * This function initializes the loop filter boundary limits if the frame's
387 * quality index is different from the previous frame's.
389 * The filter_limit_values may not be larger than 127.
391 static void init_loop_filter(Vp3DecodeContext *s)
393 int *bounding_values= s->bounding_values_array+127;
398 filter_limit = s->filter_limit_values[s->qps[0]];
399 av_assert0(filter_limit < 128U);
401 /* set up the bounding values */
402 memset(s->bounding_values_array, 0, 256 * sizeof(int));
403 for (x = 0; x < filter_limit; x++) {
404 bounding_values[-x] = -x;
405 bounding_values[x] = x;
407 for (x = value = filter_limit; x < 128 && value; x++, value--) {
408 bounding_values[ x] = value;
409 bounding_values[-x] = -value;
412 bounding_values[128] = value;
413 bounding_values[129] = bounding_values[130] = filter_limit * 0x02020202;
417 * This function unpacks all of the superblock/macroblock/fragment coding
418 * information from the bitstream.
420 static int unpack_superblocks(Vp3DecodeContext *s, GetBitContext *gb)
422 int superblock_starts[3] = { 0, s->u_superblock_start, s->v_superblock_start };
424 int current_superblock = 0;
426 int num_partial_superblocks = 0;
429 int current_fragment;
433 memset(s->superblock_coding, SB_FULLY_CODED, s->superblock_count);
437 /* unpack the list of partially-coded superblocks */
438 bit = get_bits1(gb) ^ 1;
441 while (current_superblock < s->superblock_count && get_bits_left(gb) > 0) {
442 if (s->theora && current_run == MAXIMUM_LONG_BIT_RUN)
447 current_run = get_vlc2(gb,
448 s->superblock_run_length_vlc.table, 6, 2) + 1;
449 if (current_run == 34)
450 current_run += get_bits(gb, 12);
452 if (current_superblock + current_run > s->superblock_count) {
453 av_log(s->avctx, AV_LOG_ERROR, "Invalid partially coded superblock run length\n");
457 memset(s->superblock_coding + current_superblock, bit, current_run);
459 current_superblock += current_run;
461 num_partial_superblocks += current_run;
464 /* unpack the list of fully coded superblocks if any of the blocks were
465 * not marked as partially coded in the previous step */
466 if (num_partial_superblocks < s->superblock_count) {
467 int superblocks_decoded = 0;
469 current_superblock = 0;
470 bit = get_bits1(gb) ^ 1;
473 while (superblocks_decoded < s->superblock_count - num_partial_superblocks
474 && get_bits_left(gb) > 0) {
476 if (s->theora && current_run == MAXIMUM_LONG_BIT_RUN)
481 current_run = get_vlc2(gb,
482 s->superblock_run_length_vlc.table, 6, 2) + 1;
483 if (current_run == 34)
484 current_run += get_bits(gb, 12);
486 for (j = 0; j < current_run; current_superblock++) {
487 if (current_superblock >= s->superblock_count) {
488 av_log(s->avctx, AV_LOG_ERROR, "Invalid fully coded superblock run length\n");
492 /* skip any superblocks already marked as partially coded */
493 if (s->superblock_coding[current_superblock] == SB_NOT_CODED) {
494 s->superblock_coding[current_superblock] = 2*bit;
498 superblocks_decoded += current_run;
502 /* if there were partial blocks, initialize bitstream for
503 * unpacking fragment codings */
504 if (num_partial_superblocks) {
508 /* toggle the bit because as soon as the first run length is
509 * fetched the bit will be toggled again */
514 /* figure out which fragments are coded; iterate through each
515 * superblock (all planes) */
516 s->total_num_coded_frags = 0;
517 memset(s->macroblock_coding, MODE_COPY, s->macroblock_count);
519 for (plane = 0; plane < 3; plane++) {
520 int sb_start = superblock_starts[plane];
521 int sb_end = sb_start + (plane ? s->c_superblock_count : s->y_superblock_count);
522 int num_coded_frags = 0;
524 for (i = sb_start; i < sb_end && get_bits_left(gb) > 0; i++) {
526 /* iterate through all 16 fragments in a superblock */
527 for (j = 0; j < 16; j++) {
529 /* if the fragment is in bounds, check its coding status */
530 current_fragment = s->superblock_fragments[i * 16 + j];
531 if (current_fragment != -1) {
532 int coded = s->superblock_coding[i];
534 if (s->superblock_coding[i] == SB_PARTIALLY_CODED) {
536 /* fragment may or may not be coded; this is the case
537 * that cares about the fragment coding runs */
538 if (current_run-- == 0) {
540 current_run = get_vlc2(gb,
541 s->fragment_run_length_vlc.table, 5, 2);
547 /* default mode; actual mode will be decoded in
549 s->all_fragments[current_fragment].coding_method =
551 s->coded_fragment_list[plane][num_coded_frags++] =
554 /* not coded; copy this fragment from the prior frame */
555 s->all_fragments[current_fragment].coding_method =
561 s->total_num_coded_frags += num_coded_frags;
562 for (i = 0; i < 64; i++)
563 s->num_coded_frags[plane][i] = num_coded_frags;
565 s->coded_fragment_list[plane+1] = s->coded_fragment_list[plane] + num_coded_frags;
571 * This function unpacks all the coding mode data for individual macroblocks
572 * from the bitstream.
574 static int unpack_modes(Vp3DecodeContext *s, GetBitContext *gb)
576 int i, j, k, sb_x, sb_y;
578 int current_macroblock;
579 int current_fragment;
581 int custom_mode_alphabet[CODING_MODE_COUNT];
586 for (i = 0; i < s->fragment_count; i++)
587 s->all_fragments[i].coding_method = MODE_INTRA;
591 /* fetch the mode coding scheme for this frame */
592 scheme = get_bits(gb, 3);
594 /* is it a custom coding scheme? */
596 for (i = 0; i < 8; i++)
597 custom_mode_alphabet[i] = MODE_INTER_NO_MV;
598 for (i = 0; i < 8; i++)
599 custom_mode_alphabet[get_bits(gb, 3)] = i;
600 alphabet = custom_mode_alphabet;
602 alphabet = ModeAlphabet[scheme-1];
604 /* iterate through all of the macroblocks that contain 1 or more
606 for (sb_y = 0; sb_y < s->y_superblock_height; sb_y++) {
607 for (sb_x = 0; sb_x < s->y_superblock_width; sb_x++) {
608 if (get_bits_left(gb) <= 0)
611 for (j = 0; j < 4; j++) {
612 int mb_x = 2*sb_x + (j>>1);
613 int mb_y = 2*sb_y + (((j>>1)+j)&1);
614 current_macroblock = mb_y * s->macroblock_width + mb_x;
616 if (mb_x >= s->macroblock_width || mb_y >= s->macroblock_height)
619 #define BLOCK_X (2*mb_x + (k&1))
620 #define BLOCK_Y (2*mb_y + (k>>1))
621 /* coding modes are only stored if the macroblock has at least one
622 * luma block coded, otherwise it must be INTER_NO_MV */
623 for (k = 0; k < 4; k++) {
624 current_fragment = BLOCK_Y*s->fragment_width[0] + BLOCK_X;
625 if (s->all_fragments[current_fragment].coding_method != MODE_COPY)
629 s->macroblock_coding[current_macroblock] = MODE_INTER_NO_MV;
633 /* mode 7 means get 3 bits for each coding mode */
635 coding_mode = get_bits(gb, 3);
637 coding_mode = alphabet
638 [get_vlc2(gb, s->mode_code_vlc.table, 3, 3)];
640 s->macroblock_coding[current_macroblock] = coding_mode;
641 for (k = 0; k < 4; k++) {
642 frag = s->all_fragments + BLOCK_Y*s->fragment_width[0] + BLOCK_X;
643 if (frag->coding_method != MODE_COPY)
644 frag->coding_method = coding_mode;
647 #define SET_CHROMA_MODES \
648 if (frag[s->fragment_start[1]].coding_method != MODE_COPY) \
649 frag[s->fragment_start[1]].coding_method = coding_mode;\
650 if (frag[s->fragment_start[2]].coding_method != MODE_COPY) \
651 frag[s->fragment_start[2]].coding_method = coding_mode;
653 if (s->chroma_y_shift) {
654 frag = s->all_fragments + mb_y*s->fragment_width[1] + mb_x;
656 } else if (s->chroma_x_shift) {
657 frag = s->all_fragments + 2*mb_y*s->fragment_width[1] + mb_x;
658 for (k = 0; k < 2; k++) {
660 frag += s->fragment_width[1];
663 for (k = 0; k < 4; k++) {
664 frag = s->all_fragments + BLOCK_Y*s->fragment_width[1] + BLOCK_X;
677 * This function unpacks all the motion vectors for the individual
678 * macroblocks from the bitstream.
680 static int unpack_vectors(Vp3DecodeContext *s, GetBitContext *gb)
682 int j, k, sb_x, sb_y;
686 int last_motion_x = 0;
687 int last_motion_y = 0;
688 int prior_last_motion_x = 0;
689 int prior_last_motion_y = 0;
690 int current_macroblock;
691 int current_fragment;
697 /* coding mode 0 is the VLC scheme; 1 is the fixed code scheme */
698 coding_mode = get_bits1(gb);
700 /* iterate through all of the macroblocks that contain 1 or more
702 for (sb_y = 0; sb_y < s->y_superblock_height; sb_y++) {
703 for (sb_x = 0; sb_x < s->y_superblock_width; sb_x++) {
704 if (get_bits_left(gb) <= 0)
707 for (j = 0; j < 4; j++) {
708 int mb_x = 2*sb_x + (j>>1);
709 int mb_y = 2*sb_y + (((j>>1)+j)&1);
710 current_macroblock = mb_y * s->macroblock_width + mb_x;
712 if (mb_x >= s->macroblock_width || mb_y >= s->macroblock_height ||
713 (s->macroblock_coding[current_macroblock] == MODE_COPY))
716 switch (s->macroblock_coding[current_macroblock]) {
718 case MODE_INTER_PLUS_MV:
720 /* all 6 fragments use the same motion vector */
721 if (coding_mode == 0) {
722 motion_x[0] = motion_vector_table[get_vlc2(gb, s->motion_vector_vlc.table, 6, 2)];
723 motion_y[0] = motion_vector_table[get_vlc2(gb, s->motion_vector_vlc.table, 6, 2)];
725 motion_x[0] = fixed_motion_vector_table[get_bits(gb, 6)];
726 motion_y[0] = fixed_motion_vector_table[get_bits(gb, 6)];
729 /* vector maintenance, only on MODE_INTER_PLUS_MV */
730 if (s->macroblock_coding[current_macroblock] ==
731 MODE_INTER_PLUS_MV) {
732 prior_last_motion_x = last_motion_x;
733 prior_last_motion_y = last_motion_y;
734 last_motion_x = motion_x[0];
735 last_motion_y = motion_y[0];
739 case MODE_INTER_FOURMV:
740 /* vector maintenance */
741 prior_last_motion_x = last_motion_x;
742 prior_last_motion_y = last_motion_y;
744 /* fetch 4 vectors from the bitstream, one for each
745 * Y fragment, then average for the C fragment vectors */
746 for (k = 0; k < 4; k++) {
747 current_fragment = BLOCK_Y*s->fragment_width[0] + BLOCK_X;
748 if (s->all_fragments[current_fragment].coding_method != MODE_COPY) {
749 if (coding_mode == 0) {
750 motion_x[k] = motion_vector_table[get_vlc2(gb, s->motion_vector_vlc.table, 6, 2)];
751 motion_y[k] = motion_vector_table[get_vlc2(gb, s->motion_vector_vlc.table, 6, 2)];
753 motion_x[k] = fixed_motion_vector_table[get_bits(gb, 6)];
754 motion_y[k] = fixed_motion_vector_table[get_bits(gb, 6)];
756 last_motion_x = motion_x[k];
757 last_motion_y = motion_y[k];
765 case MODE_INTER_LAST_MV:
766 /* all 6 fragments use the last motion vector */
767 motion_x[0] = last_motion_x;
768 motion_y[0] = last_motion_y;
770 /* no vector maintenance (last vector remains the
774 case MODE_INTER_PRIOR_LAST:
775 /* all 6 fragments use the motion vector prior to the
776 * last motion vector */
777 motion_x[0] = prior_last_motion_x;
778 motion_y[0] = prior_last_motion_y;
780 /* vector maintenance */
781 prior_last_motion_x = last_motion_x;
782 prior_last_motion_y = last_motion_y;
783 last_motion_x = motion_x[0];
784 last_motion_y = motion_y[0];
788 /* covers intra, inter without MV, golden without MV */
792 /* no vector maintenance */
796 /* assign the motion vectors to the correct fragments */
797 for (k = 0; k < 4; k++) {
799 BLOCK_Y*s->fragment_width[0] + BLOCK_X;
800 if (s->macroblock_coding[current_macroblock] == MODE_INTER_FOURMV) {
801 s->motion_val[0][current_fragment][0] = motion_x[k];
802 s->motion_val[0][current_fragment][1] = motion_y[k];
804 s->motion_val[0][current_fragment][0] = motion_x[0];
805 s->motion_val[0][current_fragment][1] = motion_y[0];
809 if (s->chroma_y_shift) {
810 if (s->macroblock_coding[current_macroblock] == MODE_INTER_FOURMV) {
811 motion_x[0] = RSHIFT(motion_x[0] + motion_x[1] + motion_x[2] + motion_x[3], 2);
812 motion_y[0] = RSHIFT(motion_y[0] + motion_y[1] + motion_y[2] + motion_y[3], 2);
814 motion_x[0] = (motion_x[0]>>1) | (motion_x[0]&1);
815 motion_y[0] = (motion_y[0]>>1) | (motion_y[0]&1);
816 frag = mb_y*s->fragment_width[1] + mb_x;
817 s->motion_val[1][frag][0] = motion_x[0];
818 s->motion_val[1][frag][1] = motion_y[0];
819 } else if (s->chroma_x_shift) {
820 if (s->macroblock_coding[current_macroblock] == MODE_INTER_FOURMV) {
821 motion_x[0] = RSHIFT(motion_x[0] + motion_x[1], 1);
822 motion_y[0] = RSHIFT(motion_y[0] + motion_y[1], 1);
823 motion_x[1] = RSHIFT(motion_x[2] + motion_x[3], 1);
824 motion_y[1] = RSHIFT(motion_y[2] + motion_y[3], 1);
826 motion_x[1] = motion_x[0];
827 motion_y[1] = motion_y[0];
829 motion_x[0] = (motion_x[0]>>1) | (motion_x[0]&1);
830 motion_x[1] = (motion_x[1]>>1) | (motion_x[1]&1);
832 frag = 2*mb_y*s->fragment_width[1] + mb_x;
833 for (k = 0; k < 2; k++) {
834 s->motion_val[1][frag][0] = motion_x[k];
835 s->motion_val[1][frag][1] = motion_y[k];
836 frag += s->fragment_width[1];
839 for (k = 0; k < 4; k++) {
840 frag = BLOCK_Y*s->fragment_width[1] + BLOCK_X;
841 if (s->macroblock_coding[current_macroblock] == MODE_INTER_FOURMV) {
842 s->motion_val[1][frag][0] = motion_x[k];
843 s->motion_val[1][frag][1] = motion_y[k];
845 s->motion_val[1][frag][0] = motion_x[0];
846 s->motion_val[1][frag][1] = motion_y[0];
857 static int unpack_block_qpis(Vp3DecodeContext *s, GetBitContext *gb)
859 int qpi, i, j, bit, run_length, blocks_decoded, num_blocks_at_qpi;
860 int num_blocks = s->total_num_coded_frags;
862 for (qpi = 0; qpi < s->nqps-1 && num_blocks > 0; qpi++) {
863 i = blocks_decoded = num_blocks_at_qpi = 0;
865 bit = get_bits1(gb) ^ 1;
869 if (run_length == MAXIMUM_LONG_BIT_RUN)
874 run_length = get_vlc2(gb, s->superblock_run_length_vlc.table, 6, 2) + 1;
875 if (run_length == 34)
876 run_length += get_bits(gb, 12);
877 blocks_decoded += run_length;
880 num_blocks_at_qpi += run_length;
882 for (j = 0; j < run_length; i++) {
883 if (i >= s->total_num_coded_frags)
886 if (s->all_fragments[s->coded_fragment_list[0][i]].qpi == qpi) {
887 s->all_fragments[s->coded_fragment_list[0][i]].qpi += bit;
891 } while (blocks_decoded < num_blocks && get_bits_left(gb) > 0);
893 num_blocks -= num_blocks_at_qpi;
900 * This function is called by unpack_dct_coeffs() to extract the VLCs from
901 * the bitstream. The VLCs encode tokens which are used to unpack DCT
902 * data. This function unpacks all the VLCs for either the Y plane or both
903 * C planes, and is called for DC coefficients or different AC coefficient
904 * levels (since different coefficient types require different VLC tables.
906 * This function returns a residual eob run. E.g, if a particular token gave
907 * instructions to EOB the next 5 fragments and there were only 2 fragments
908 * left in the current fragment range, 3 would be returned so that it could
909 * be passed into the next call to this same function.
911 static int unpack_vlcs(Vp3DecodeContext *s, GetBitContext *gb,
912 VLC *table, int coeff_index,
923 int num_coeffs = s->num_coded_frags[plane][coeff_index];
924 int16_t *dct_tokens = s->dct_tokens[plane][coeff_index];
926 /* local references to structure members to avoid repeated deferences */
927 int *coded_fragment_list = s->coded_fragment_list[plane];
928 Vp3Fragment *all_fragments = s->all_fragments;
929 VLC_TYPE (*vlc_table)[2] = table->table;
932 av_log(s->avctx, AV_LOG_ERROR, "Invalid number of coefficents at level %d\n", coeff_index);
934 if (eob_run > num_coeffs) {
935 coeff_i = blocks_ended = num_coeffs;
936 eob_run -= num_coeffs;
938 coeff_i = blocks_ended = eob_run;
942 // insert fake EOB token to cover the split between planes or zzi
944 dct_tokens[j++] = blocks_ended << 2;
946 while (coeff_i < num_coeffs && get_bits_left(gb) > 0) {
947 /* decode a VLC into a token */
948 token = get_vlc2(gb, vlc_table, 11, 3);
949 /* use the token to get a zero run, a coefficient, and an eob run */
950 if ((unsigned) token <= 6U) {
951 eob_run = eob_run_base[token];
952 if (eob_run_get_bits[token])
953 eob_run += get_bits(gb, eob_run_get_bits[token]);
955 // record only the number of blocks ended in this plane,
956 // any spill will be recorded in the next plane.
957 if (eob_run > num_coeffs - coeff_i) {
958 dct_tokens[j++] = TOKEN_EOB(num_coeffs - coeff_i);
959 blocks_ended += num_coeffs - coeff_i;
960 eob_run -= num_coeffs - coeff_i;
961 coeff_i = num_coeffs;
963 dct_tokens[j++] = TOKEN_EOB(eob_run);
964 blocks_ended += eob_run;
968 } else if (token >= 0) {
969 bits_to_get = coeff_get_bits[token];
971 bits_to_get = get_bits(gb, bits_to_get);
972 coeff = coeff_tables[token][bits_to_get];
974 zero_run = zero_run_base[token];
975 if (zero_run_get_bits[token])
976 zero_run += get_bits(gb, zero_run_get_bits[token]);
979 dct_tokens[j++] = TOKEN_ZERO_RUN(coeff, zero_run);
981 // Save DC into the fragment structure. DC prediction is
982 // done in raster order, so the actual DC can't be in with
983 // other tokens. We still need the token in dct_tokens[]
984 // however, or else the structure collapses on itself.
986 all_fragments[coded_fragment_list[coeff_i]].dc = coeff;
988 dct_tokens[j++] = TOKEN_COEFF(coeff);
991 if (coeff_index + zero_run > 64) {
992 av_log(s->avctx, AV_LOG_DEBUG, "Invalid zero run of %d with"
993 " %d coeffs left\n", zero_run, 64-coeff_index);
994 zero_run = 64 - coeff_index;
997 // zero runs code multiple coefficients,
998 // so don't try to decode coeffs for those higher levels
999 for (i = coeff_index+1; i <= coeff_index+zero_run; i++)
1000 s->num_coded_frags[plane][i]--;
1003 av_log(s->avctx, AV_LOG_ERROR,
1004 "Invalid token %d\n", token);
1009 if (blocks_ended > s->num_coded_frags[plane][coeff_index])
1010 av_log(s->avctx, AV_LOG_ERROR, "More blocks ended than coded!\n");
1012 // decrement the number of blocks that have higher coeffecients for each
1013 // EOB run at this level
1015 for (i = coeff_index+1; i < 64; i++)
1016 s->num_coded_frags[plane][i] -= blocks_ended;
1018 // setup the next buffer
1020 s->dct_tokens[plane+1][coeff_index] = dct_tokens + j;
1021 else if (coeff_index < 63)
1022 s->dct_tokens[0][coeff_index+1] = dct_tokens + j;
1027 static void reverse_dc_prediction(Vp3DecodeContext *s,
1030 int fragment_height);
1032 * This function unpacks all of the DCT coefficient data from the
1035 static int unpack_dct_coeffs(Vp3DecodeContext *s, GetBitContext *gb)
1042 int residual_eob_run = 0;
1046 s->dct_tokens[0][0] = s->dct_tokens_base;
1048 /* fetch the DC table indexes */
1049 dc_y_table = get_bits(gb, 4);
1050 dc_c_table = get_bits(gb, 4);
1052 /* unpack the Y plane DC coefficients */
1053 residual_eob_run = unpack_vlcs(s, gb, &s->dc_vlc[dc_y_table], 0,
1054 0, residual_eob_run);
1055 if (residual_eob_run < 0)
1056 return residual_eob_run;
1058 /* reverse prediction of the Y-plane DC coefficients */
1059 reverse_dc_prediction(s, 0, s->fragment_width[0], s->fragment_height[0]);
1061 /* unpack the C plane DC coefficients */
1062 residual_eob_run = unpack_vlcs(s, gb, &s->dc_vlc[dc_c_table], 0,
1063 1, residual_eob_run);
1064 if (residual_eob_run < 0)
1065 return residual_eob_run;
1066 residual_eob_run = unpack_vlcs(s, gb, &s->dc_vlc[dc_c_table], 0,
1067 2, residual_eob_run);
1068 if (residual_eob_run < 0)
1069 return residual_eob_run;
1071 /* reverse prediction of the C-plane DC coefficients */
1072 if (!(s->avctx->flags & CODEC_FLAG_GRAY))
1074 reverse_dc_prediction(s, s->fragment_start[1],
1075 s->fragment_width[1], s->fragment_height[1]);
1076 reverse_dc_prediction(s, s->fragment_start[2],
1077 s->fragment_width[1], s->fragment_height[1]);
1080 /* fetch the AC table indexes */
1081 ac_y_table = get_bits(gb, 4);
1082 ac_c_table = get_bits(gb, 4);
1084 /* build tables of AC VLC tables */
1085 for (i = 1; i <= 5; i++) {
1086 y_tables[i] = &s->ac_vlc_1[ac_y_table];
1087 c_tables[i] = &s->ac_vlc_1[ac_c_table];
1089 for (i = 6; i <= 14; i++) {
1090 y_tables[i] = &s->ac_vlc_2[ac_y_table];
1091 c_tables[i] = &s->ac_vlc_2[ac_c_table];
1093 for (i = 15; i <= 27; i++) {
1094 y_tables[i] = &s->ac_vlc_3[ac_y_table];
1095 c_tables[i] = &s->ac_vlc_3[ac_c_table];
1097 for (i = 28; i <= 63; i++) {
1098 y_tables[i] = &s->ac_vlc_4[ac_y_table];
1099 c_tables[i] = &s->ac_vlc_4[ac_c_table];
1102 /* decode all AC coefficents */
1103 for (i = 1; i <= 63; i++) {
1104 residual_eob_run = unpack_vlcs(s, gb, y_tables[i], i,
1105 0, residual_eob_run);
1106 if (residual_eob_run < 0)
1107 return residual_eob_run;
1109 residual_eob_run = unpack_vlcs(s, gb, c_tables[i], i,
1110 1, residual_eob_run);
1111 if (residual_eob_run < 0)
1112 return residual_eob_run;
1113 residual_eob_run = unpack_vlcs(s, gb, c_tables[i], i,
1114 2, residual_eob_run);
1115 if (residual_eob_run < 0)
1116 return residual_eob_run;
1123 * This function reverses the DC prediction for each coded fragment in
1124 * the frame. Much of this function is adapted directly from the original
1127 #define COMPATIBLE_FRAME(x) \
1128 (compatible_frame[s->all_fragments[x].coding_method] == current_frame_type)
1129 #define DC_COEFF(u) s->all_fragments[u].dc
1131 static void reverse_dc_prediction(Vp3DecodeContext *s,
1134 int fragment_height)
1143 int i = first_fragment;
1147 /* DC values for the left, up-left, up, and up-right fragments */
1148 int vl, vul, vu, vur;
1150 /* indexes for the left, up-left, up, and up-right fragments */
1154 * The 6 fields mean:
1155 * 0: up-left multiplier
1157 * 2: up-right multiplier
1158 * 3: left multiplier
1160 static const int predictor_transform[16][4] = {
1162 { 0, 0, 0,128}, // PL
1163 { 0, 0,128, 0}, // PUR
1164 { 0, 0, 53, 75}, // PUR|PL
1165 { 0,128, 0, 0}, // PU
1166 { 0, 64, 0, 64}, // PU|PL
1167 { 0,128, 0, 0}, // PU|PUR
1168 { 0, 0, 53, 75}, // PU|PUR|PL
1169 {128, 0, 0, 0}, // PUL
1170 { 0, 0, 0,128}, // PUL|PL
1171 { 64, 0, 64, 0}, // PUL|PUR
1172 { 0, 0, 53, 75}, // PUL|PUR|PL
1173 { 0,128, 0, 0}, // PUL|PU
1174 {-104,116, 0,116}, // PUL|PU|PL
1175 { 24, 80, 24, 0}, // PUL|PU|PUR
1176 {-104,116, 0,116} // PUL|PU|PUR|PL
1179 /* This table shows which types of blocks can use other blocks for
1180 * prediction. For example, INTRA is the only mode in this table to
1181 * have a frame number of 0. That means INTRA blocks can only predict
1182 * from other INTRA blocks. There are 2 golden frame coding types;
1183 * blocks encoding in these modes can only predict from other blocks
1184 * that were encoded with these 1 of these 2 modes. */
1185 static const unsigned char compatible_frame[9] = {
1186 1, /* MODE_INTER_NO_MV */
1188 1, /* MODE_INTER_PLUS_MV */
1189 1, /* MODE_INTER_LAST_MV */
1190 1, /* MODE_INTER_PRIOR_MV */
1191 2, /* MODE_USING_GOLDEN */
1192 2, /* MODE_GOLDEN_MV */
1193 1, /* MODE_INTER_FOUR_MV */
1196 int current_frame_type;
1198 /* there is a last DC predictor for each of the 3 frame types */
1203 vul = vu = vur = vl = 0;
1204 last_dc[0] = last_dc[1] = last_dc[2] = 0;
1206 /* for each fragment row... */
1207 for (y = 0; y < fragment_height; y++) {
1209 /* for each fragment in a row... */
1210 for (x = 0; x < fragment_width; x++, i++) {
1212 /* reverse prediction if this block was coded */
1213 if (s->all_fragments[i].coding_method != MODE_COPY) {
1215 current_frame_type =
1216 compatible_frame[s->all_fragments[i].coding_method];
1222 if(COMPATIBLE_FRAME(l))
1226 u= i-fragment_width;
1228 if(COMPATIBLE_FRAME(u))
1231 ul= i-fragment_width-1;
1233 if(COMPATIBLE_FRAME(ul))
1236 if(x + 1 < fragment_width){
1237 ur= i-fragment_width+1;
1239 if(COMPATIBLE_FRAME(ur))
1244 if (transform == 0) {
1246 /* if there were no fragments to predict from, use last
1248 predicted_dc = last_dc[current_frame_type];
1251 /* apply the appropriate predictor transform */
1253 (predictor_transform[transform][0] * vul) +
1254 (predictor_transform[transform][1] * vu) +
1255 (predictor_transform[transform][2] * vur) +
1256 (predictor_transform[transform][3] * vl);
1258 predicted_dc /= 128;
1260 /* check for outranging on the [ul u l] and
1261 * [ul u ur l] predictors */
1262 if ((transform == 15) || (transform == 13)) {
1263 if (FFABS(predicted_dc - vu) > 128)
1265 else if (FFABS(predicted_dc - vl) > 128)
1267 else if (FFABS(predicted_dc - vul) > 128)
1272 /* at long last, apply the predictor */
1273 DC_COEFF(i) += predicted_dc;
1275 last_dc[current_frame_type] = DC_COEFF(i);
1281 static void apply_loop_filter(Vp3DecodeContext *s, int plane, int ystart, int yend)
1284 int *bounding_values= s->bounding_values_array+127;
1286 int width = s->fragment_width[!!plane];
1287 int height = s->fragment_height[!!plane];
1288 int fragment = s->fragment_start [plane] + ystart * width;
1289 int stride = s->current_frame.linesize[plane];
1290 uint8_t *plane_data = s->current_frame.data [plane];
1291 if (!s->flipped_image) stride = -stride;
1292 plane_data += s->data_offset[plane] + 8*ystart*stride;
1294 for (y = ystart; y < yend; y++) {
1296 for (x = 0; x < width; x++) {
1297 /* This code basically just deblocks on the edges of coded blocks.
1298 * However, it has to be much more complicated because of the
1299 * braindamaged deblock ordering used in VP3/Theora. Order matters
1300 * because some pixels get filtered twice. */
1301 if( s->all_fragments[fragment].coding_method != MODE_COPY )
1303 /* do not perform left edge filter for left columns frags */
1305 s->dsp.vp3_h_loop_filter(
1307 stride, bounding_values);
1310 /* do not perform top edge filter for top row fragments */
1312 s->dsp.vp3_v_loop_filter(
1314 stride, bounding_values);
1317 /* do not perform right edge filter for right column
1318 * fragments or if right fragment neighbor is also coded
1319 * in this frame (it will be filtered in next iteration) */
1320 if ((x < width - 1) &&
1321 (s->all_fragments[fragment + 1].coding_method == MODE_COPY)) {
1322 s->dsp.vp3_h_loop_filter(
1323 plane_data + 8*x + 8,
1324 stride, bounding_values);
1327 /* do not perform bottom edge filter for bottom row
1328 * fragments or if bottom fragment neighbor is also coded
1329 * in this frame (it will be filtered in the next row) */
1330 if ((y < height - 1) &&
1331 (s->all_fragments[fragment + width].coding_method == MODE_COPY)) {
1332 s->dsp.vp3_v_loop_filter(
1333 plane_data + 8*x + 8*stride,
1334 stride, bounding_values);
1340 plane_data += 8*stride;
1345 * Pull DCT tokens from the 64 levels to decode and dequant the coefficients
1346 * for the next block in coding order
1348 static inline int vp3_dequant(Vp3DecodeContext *s, Vp3Fragment *frag,
1349 int plane, int inter, DCTELEM block[64])
1351 int16_t *dequantizer = s->qmat[frag->qpi][inter][plane];
1352 uint8_t *perm = s->scantable.permutated;
1356 int token = *s->dct_tokens[plane][i];
1357 switch (token & 3) {
1359 if (--token < 4) // 0-3 are token types, so the EOB run must now be 0
1360 s->dct_tokens[plane][i]++;
1362 *s->dct_tokens[plane][i] = token & ~3;
1365 s->dct_tokens[plane][i]++;
1366 i += (token >> 2) & 0x7f;
1368 av_log(s->avctx, AV_LOG_ERROR, "Coefficient index overflow\n");
1371 block[perm[i]] = (token >> 9) * dequantizer[perm[i]];
1375 block[perm[i]] = (token >> 2) * dequantizer[perm[i]];
1376 s->dct_tokens[plane][i++]++;
1378 default: // shouldn't happen
1382 // return value is expected to be a valid level
1385 // the actual DC+prediction is in the fragment structure
1386 block[0] = frag->dc * s->qmat[0][inter][plane][0];
1391 * called when all pixels up to row y are complete
1393 static void vp3_draw_horiz_band(Vp3DecodeContext *s, int y)
1396 int offset[AV_NUM_DATA_POINTERS];
1398 if (HAVE_THREADS && s->avctx->active_thread_type&FF_THREAD_FRAME) {
1399 int y_flipped = s->flipped_image ? s->avctx->height-y : y;
1401 // At the end of the frame, report INT_MAX instead of the height of the frame.
1402 // This makes the other threads' ff_thread_await_progress() calls cheaper, because
1403 // they don't have to clip their values.
1404 ff_thread_report_progress(&s->current_frame, y_flipped==s->avctx->height ? INT_MAX : y_flipped-1, 0);
1407 if(s->avctx->draw_horiz_band==NULL)
1410 h= y - s->last_slice_end;
1411 s->last_slice_end= y;
1414 if (!s->flipped_image) {
1415 y = s->avctx->height - y - h;
1418 cy = y >> s->chroma_y_shift;
1419 offset[0] = s->current_frame.linesize[0]*y;
1420 offset[1] = s->current_frame.linesize[1]*cy;
1421 offset[2] = s->current_frame.linesize[2]*cy;
1422 for (i = 3; i < AV_NUM_DATA_POINTERS; i++)
1426 s->avctx->draw_horiz_band(s->avctx, &s->current_frame, offset, y, 3, h);
1430 * Wait for the reference frame of the current fragment.
1431 * The progress value is in luma pixel rows.
1433 static void await_reference_row(Vp3DecodeContext *s, Vp3Fragment *fragment, int motion_y, int y)
1437 int border = motion_y&1;
1439 if (fragment->coding_method == MODE_USING_GOLDEN ||
1440 fragment->coding_method == MODE_GOLDEN_MV)
1441 ref_frame = &s->golden_frame;
1443 ref_frame = &s->last_frame;
1445 ref_row = y + (motion_y>>1);
1446 ref_row = FFMAX(FFABS(ref_row), ref_row + 8 + border);
1448 ff_thread_await_progress(ref_frame, ref_row, 0);
1452 * Perform the final rendering for a particular slice of data.
1453 * The slice number ranges from 0..(c_superblock_height - 1).
1455 static void render_slice(Vp3DecodeContext *s, int slice)
1457 int x, y, i, j, fragment;
1458 LOCAL_ALIGNED_16(DCTELEM, block, [64]);
1459 int motion_x = 0xdeadbeef, motion_y = 0xdeadbeef;
1460 int motion_halfpel_index;
1461 uint8_t *motion_source;
1462 int plane, first_pixel;
1464 if (slice >= s->c_superblock_height)
1467 for (plane = 0; plane < 3; plane++) {
1468 uint8_t *output_plane = s->current_frame.data [plane] + s->data_offset[plane];
1469 uint8_t * last_plane = s-> last_frame.data [plane] + s->data_offset[plane];
1470 uint8_t *golden_plane = s-> golden_frame.data [plane] + s->data_offset[plane];
1471 int stride = s->current_frame.linesize[plane];
1472 int plane_width = s->width >> (plane && s->chroma_x_shift);
1473 int plane_height = s->height >> (plane && s->chroma_y_shift);
1474 int8_t (*motion_val)[2] = s->motion_val[!!plane];
1476 int sb_x, sb_y = slice << (!plane && s->chroma_y_shift);
1477 int slice_height = sb_y + 1 + (!plane && s->chroma_y_shift);
1478 int slice_width = plane ? s->c_superblock_width : s->y_superblock_width;
1480 int fragment_width = s->fragment_width[!!plane];
1481 int fragment_height = s->fragment_height[!!plane];
1482 int fragment_start = s->fragment_start[plane];
1483 int do_await = !plane && HAVE_THREADS && (s->avctx->active_thread_type&FF_THREAD_FRAME);
1485 if (!s->flipped_image) stride = -stride;
1486 if (CONFIG_GRAY && plane && (s->avctx->flags & CODEC_FLAG_GRAY))
1489 /* for each superblock row in the slice (both of them)... */
1490 for (; sb_y < slice_height; sb_y++) {
1492 /* for each superblock in a row... */
1493 for (sb_x = 0; sb_x < slice_width; sb_x++) {
1495 /* for each block in a superblock... */
1496 for (j = 0; j < 16; j++) {
1497 x = 4*sb_x + hilbert_offset[j][0];
1498 y = 4*sb_y + hilbert_offset[j][1];
1499 fragment = y*fragment_width + x;
1501 i = fragment_start + fragment;
1504 if (x >= fragment_width || y >= fragment_height)
1507 first_pixel = 8*y*stride + 8*x;
1509 if (do_await && s->all_fragments[i].coding_method != MODE_INTRA)
1510 await_reference_row(s, &s->all_fragments[i], motion_val[fragment][1], (16*y) >> s->chroma_y_shift);
1512 /* transform if this block was coded */
1513 if (s->all_fragments[i].coding_method != MODE_COPY) {
1514 if ((s->all_fragments[i].coding_method == MODE_USING_GOLDEN) ||
1515 (s->all_fragments[i].coding_method == MODE_GOLDEN_MV))
1516 motion_source= golden_plane;
1518 motion_source= last_plane;
1520 motion_source += first_pixel;
1521 motion_halfpel_index = 0;
1523 /* sort out the motion vector if this fragment is coded
1524 * using a motion vector method */
1525 if ((s->all_fragments[i].coding_method > MODE_INTRA) &&
1526 (s->all_fragments[i].coding_method != MODE_USING_GOLDEN)) {
1528 motion_x = motion_val[fragment][0];
1529 motion_y = motion_val[fragment][1];
1531 src_x= (motion_x>>1) + 8*x;
1532 src_y= (motion_y>>1) + 8*y;
1534 motion_halfpel_index = motion_x & 0x01;
1535 motion_source += (motion_x >> 1);
1537 motion_halfpel_index |= (motion_y & 0x01) << 1;
1538 motion_source += ((motion_y >> 1) * stride);
1540 if(src_x<0 || src_y<0 || src_x + 9 >= plane_width || src_y + 9 >= plane_height){
1541 uint8_t *temp= s->edge_emu_buffer;
1542 if(stride<0) temp -= 8*stride;
1544 s->dsp.emulated_edge_mc(temp, motion_source, stride, 9, 9, src_x, src_y, plane_width, plane_height);
1545 motion_source= temp;
1550 /* first, take care of copying a block from either the
1551 * previous or the golden frame */
1552 if (s->all_fragments[i].coding_method != MODE_INTRA) {
1553 /* Note, it is possible to implement all MC cases with
1554 put_no_rnd_pixels_l2 which would look more like the
1555 VP3 source but this would be slower as
1556 put_no_rnd_pixels_tab is better optimzed */
1557 if(motion_halfpel_index != 3){
1558 s->dsp.put_no_rnd_pixels_tab[1][motion_halfpel_index](
1559 output_plane + first_pixel,
1560 motion_source, stride, 8);
1562 int d= (motion_x ^ motion_y)>>31; // d is 0 if motion_x and _y have the same sign, else -1
1563 s->dsp.put_no_rnd_pixels_l2[1](
1564 output_plane + first_pixel,
1566 motion_source + stride + 1 + d,
1571 s->dsp.clear_block(block);
1573 /* invert DCT and place (or add) in final output */
1575 if (s->all_fragments[i].coding_method == MODE_INTRA) {
1576 vp3_dequant(s, s->all_fragments + i, plane, 0, block);
1577 if(s->avctx->idct_algo!=FF_IDCT_VP3)
1580 output_plane + first_pixel,
1584 if (vp3_dequant(s, s->all_fragments + i, plane, 1, block)) {
1586 output_plane + first_pixel,
1590 s->dsp.vp3_idct_dc_add(output_plane + first_pixel, stride, block);
1595 /* copy directly from the previous frame */
1596 s->dsp.put_pixels_tab[1][0](
1597 output_plane + first_pixel,
1598 last_plane + first_pixel,
1605 // Filter up to the last row in the superblock row
1606 if (!s->skip_loop_filter)
1607 apply_loop_filter(s, plane, 4*sb_y - !!sb_y, FFMIN(4*sb_y+3, fragment_height-1));
1611 /* this looks like a good place for slice dispatch... */
1613 * if (slice == s->macroblock_height - 1)
1614 * dispatch (both last slice & 2nd-to-last slice);
1615 * else if (slice > 0)
1616 * dispatch (slice - 1);
1619 vp3_draw_horiz_band(s, FFMIN((32 << s->chroma_y_shift) * (slice + 1) -16, s->height-16));
1622 /// Allocate tables for per-frame data in Vp3DecodeContext
1623 static av_cold int allocate_tables(AVCodecContext *avctx)
1625 Vp3DecodeContext *s = avctx->priv_data;
1626 int y_fragment_count, c_fragment_count;
1628 y_fragment_count = s->fragment_width[0] * s->fragment_height[0];
1629 c_fragment_count = s->fragment_width[1] * s->fragment_height[1];
1631 s->superblock_coding = av_malloc(s->superblock_count);
1632 s->all_fragments = av_malloc(s->fragment_count * sizeof(Vp3Fragment));
1633 s->coded_fragment_list[0] = av_malloc(s->fragment_count * sizeof(int));
1634 s->dct_tokens_base = av_malloc(64*s->fragment_count * sizeof(*s->dct_tokens_base));
1635 s->motion_val[0] = av_malloc(y_fragment_count * sizeof(*s->motion_val[0]));
1636 s->motion_val[1] = av_malloc(c_fragment_count * sizeof(*s->motion_val[1]));
1638 /* work out the block mapping tables */
1639 s->superblock_fragments = av_malloc(s->superblock_count * 16 * sizeof(int));
1640 s->macroblock_coding = av_malloc(s->macroblock_count + 1);
1642 if (!s->superblock_coding || !s->all_fragments || !s->dct_tokens_base ||
1643 !s->coded_fragment_list[0] || !s->superblock_fragments || !s->macroblock_coding ||
1644 !s->motion_val[0] || !s->motion_val[1]) {
1645 vp3_decode_end(avctx);
1649 init_block_mapping(s);
1654 static av_cold int vp3_decode_init(AVCodecContext *avctx)
1656 Vp3DecodeContext *s = avctx->priv_data;
1657 int i, inter, plane;
1660 int y_fragment_count, c_fragment_count;
1662 if (avctx->codec_tag == MKTAG('V','P','3','0'))
1668 s->width = FFALIGN(avctx->width, 16);
1669 s->height = FFALIGN(avctx->height, 16);
1670 if (avctx->codec_id != CODEC_ID_THEORA)
1671 avctx->pix_fmt = PIX_FMT_YUV420P;
1672 avctx->chroma_sample_location = AVCHROMA_LOC_CENTER;
1673 if(avctx->idct_algo==FF_IDCT_AUTO)
1674 avctx->idct_algo=FF_IDCT_VP3;
1675 ff_dsputil_init(&s->dsp, avctx);
1677 ff_init_scantable(s->dsp.idct_permutation, &s->scantable, ff_zigzag_direct);
1679 /* initialize to an impossible value which will force a recalculation
1680 * in the first frame decode */
1681 for (i = 0; i < 3; i++)
1684 avcodec_get_chroma_sub_sample(avctx->pix_fmt, &s->chroma_x_shift, &s->chroma_y_shift);
1686 s->y_superblock_width = (s->width + 31) / 32;
1687 s->y_superblock_height = (s->height + 31) / 32;
1688 s->y_superblock_count = s->y_superblock_width * s->y_superblock_height;
1690 /* work out the dimensions for the C planes */
1691 c_width = s->width >> s->chroma_x_shift;
1692 c_height = s->height >> s->chroma_y_shift;
1693 s->c_superblock_width = (c_width + 31) / 32;
1694 s->c_superblock_height = (c_height + 31) / 32;
1695 s->c_superblock_count = s->c_superblock_width * s->c_superblock_height;
1697 s->superblock_count = s->y_superblock_count + (s->c_superblock_count * 2);
1698 s->u_superblock_start = s->y_superblock_count;
1699 s->v_superblock_start = s->u_superblock_start + s->c_superblock_count;
1701 s->macroblock_width = (s->width + 15) / 16;
1702 s->macroblock_height = (s->height + 15) / 16;
1703 s->macroblock_count = s->macroblock_width * s->macroblock_height;
1705 s->fragment_width[0] = s->width / FRAGMENT_PIXELS;
1706 s->fragment_height[0] = s->height / FRAGMENT_PIXELS;
1707 s->fragment_width[1] = s->fragment_width[0] >> s->chroma_x_shift;
1708 s->fragment_height[1] = s->fragment_height[0] >> s->chroma_y_shift;
1710 /* fragment count covers all 8x8 blocks for all 3 planes */
1711 y_fragment_count = s->fragment_width[0] * s->fragment_height[0];
1712 c_fragment_count = s->fragment_width[1] * s->fragment_height[1];
1713 s->fragment_count = y_fragment_count + 2*c_fragment_count;
1714 s->fragment_start[1] = y_fragment_count;
1715 s->fragment_start[2] = y_fragment_count + c_fragment_count;
1717 if (!s->theora_tables)
1719 for (i = 0; i < 64; i++) {
1720 s->coded_dc_scale_factor[i] = vp31_dc_scale_factor[i];
1721 s->coded_ac_scale_factor[i] = vp31_ac_scale_factor[i];
1722 s->base_matrix[0][i] = vp31_intra_y_dequant[i];
1723 s->base_matrix[1][i] = vp31_intra_c_dequant[i];
1724 s->base_matrix[2][i] = vp31_inter_dequant[i];
1725 s->filter_limit_values[i] = vp31_filter_limit_values[i];
1728 for(inter=0; inter<2; inter++){
1729 for(plane=0; plane<3; plane++){
1730 s->qr_count[inter][plane]= 1;
1731 s->qr_size [inter][plane][0]= 63;
1732 s->qr_base [inter][plane][0]=
1733 s->qr_base [inter][plane][1]= 2*inter + (!!plane)*!inter;
1737 /* init VLC tables */
1738 for (i = 0; i < 16; i++) {
1741 init_vlc(&s->dc_vlc[i], 11, 32,
1742 &dc_bias[i][0][1], 4, 2,
1743 &dc_bias[i][0][0], 4, 2, 0);
1745 /* group 1 AC histograms */
1746 init_vlc(&s->ac_vlc_1[i], 11, 32,
1747 &ac_bias_0[i][0][1], 4, 2,
1748 &ac_bias_0[i][0][0], 4, 2, 0);
1750 /* group 2 AC histograms */
1751 init_vlc(&s->ac_vlc_2[i], 11, 32,
1752 &ac_bias_1[i][0][1], 4, 2,
1753 &ac_bias_1[i][0][0], 4, 2, 0);
1755 /* group 3 AC histograms */
1756 init_vlc(&s->ac_vlc_3[i], 11, 32,
1757 &ac_bias_2[i][0][1], 4, 2,
1758 &ac_bias_2[i][0][0], 4, 2, 0);
1760 /* group 4 AC histograms */
1761 init_vlc(&s->ac_vlc_4[i], 11, 32,
1762 &ac_bias_3[i][0][1], 4, 2,
1763 &ac_bias_3[i][0][0], 4, 2, 0);
1767 for (i = 0; i < 16; i++) {
1769 if (init_vlc(&s->dc_vlc[i], 11, 32,
1770 &s->huffman_table[i][0][1], 8, 4,
1771 &s->huffman_table[i][0][0], 8, 4, 0) < 0)
1774 /* group 1 AC histograms */
1775 if (init_vlc(&s->ac_vlc_1[i], 11, 32,
1776 &s->huffman_table[i+16][0][1], 8, 4,
1777 &s->huffman_table[i+16][0][0], 8, 4, 0) < 0)
1780 /* group 2 AC histograms */
1781 if (init_vlc(&s->ac_vlc_2[i], 11, 32,
1782 &s->huffman_table[i+16*2][0][1], 8, 4,
1783 &s->huffman_table[i+16*2][0][0], 8, 4, 0) < 0)
1786 /* group 3 AC histograms */
1787 if (init_vlc(&s->ac_vlc_3[i], 11, 32,
1788 &s->huffman_table[i+16*3][0][1], 8, 4,
1789 &s->huffman_table[i+16*3][0][0], 8, 4, 0) < 0)
1792 /* group 4 AC histograms */
1793 if (init_vlc(&s->ac_vlc_4[i], 11, 32,
1794 &s->huffman_table[i+16*4][0][1], 8, 4,
1795 &s->huffman_table[i+16*4][0][0], 8, 4, 0) < 0)
1800 init_vlc(&s->superblock_run_length_vlc, 6, 34,
1801 &superblock_run_length_vlc_table[0][1], 4, 2,
1802 &superblock_run_length_vlc_table[0][0], 4, 2, 0);
1804 init_vlc(&s->fragment_run_length_vlc, 5, 30,
1805 &fragment_run_length_vlc_table[0][1], 4, 2,
1806 &fragment_run_length_vlc_table[0][0], 4, 2, 0);
1808 init_vlc(&s->mode_code_vlc, 3, 8,
1809 &mode_code_vlc_table[0][1], 2, 1,
1810 &mode_code_vlc_table[0][0], 2, 1, 0);
1812 init_vlc(&s->motion_vector_vlc, 6, 63,
1813 &motion_vector_vlc_table[0][1], 2, 1,
1814 &motion_vector_vlc_table[0][0], 2, 1, 0);
1816 for (i = 0; i < 3; i++) {
1817 s->current_frame.data[i] = NULL;
1818 s->last_frame.data[i] = NULL;
1819 s->golden_frame.data[i] = NULL;
1822 return allocate_tables(avctx);
1825 av_log(avctx, AV_LOG_FATAL, "Invalid huffman table\n");
1829 /// Release and shuffle frames after decode finishes
1830 static void update_frames(AVCodecContext *avctx)
1832 Vp3DecodeContext *s = avctx->priv_data;
1834 /* release the last frame, if it is allocated and if it is not the
1836 if (s->last_frame.data[0] && s->last_frame.type != FF_BUFFER_TYPE_COPY)
1837 ff_thread_release_buffer(avctx, &s->last_frame);
1839 /* shuffle frames (last = current) */
1840 s->last_frame= s->current_frame;
1843 if (s->golden_frame.data[0])
1844 ff_thread_release_buffer(avctx, &s->golden_frame);
1845 s->golden_frame = s->current_frame;
1846 s->last_frame.type = FF_BUFFER_TYPE_COPY;
1849 s->current_frame.data[0]= NULL; /* ensure that we catch any access to this released frame */
1852 static int vp3_update_thread_context(AVCodecContext *dst, const AVCodecContext *src)
1854 Vp3DecodeContext *s = dst->priv_data, *s1 = src->priv_data;
1855 int qps_changed = 0, i, err;
1857 #define copy_fields(to, from, start_field, end_field) memcpy(&to->start_field, &from->start_field, (char*)&to->end_field - (char*)&to->start_field)
1859 if (!s1->current_frame.data[0]
1860 ||s->width != s1->width
1861 ||s->height!= s1->height) {
1863 copy_fields(s, s1, golden_frame, keyframe);
1868 // init tables if the first frame hasn't been decoded
1869 if (!s->current_frame.data[0]) {
1870 int y_fragment_count, c_fragment_count;
1872 err = allocate_tables(dst);
1875 y_fragment_count = s->fragment_width[0] * s->fragment_height[0];
1876 c_fragment_count = s->fragment_width[1] * s->fragment_height[1];
1877 memcpy(s->motion_val[0], s1->motion_val[0], y_fragment_count * sizeof(*s->motion_val[0]));
1878 memcpy(s->motion_val[1], s1->motion_val[1], c_fragment_count * sizeof(*s->motion_val[1]));
1881 // copy previous frame data
1882 copy_fields(s, s1, golden_frame, dsp);
1884 // copy qscale data if necessary
1885 for (i = 0; i < 3; i++) {
1886 if (s->qps[i] != s1->qps[1]) {
1888 memcpy(&s->qmat[i], &s1->qmat[i], sizeof(s->qmat[i]));
1892 if (s->qps[0] != s1->qps[0])
1893 memcpy(&s->bounding_values_array, &s1->bounding_values_array, sizeof(s->bounding_values_array));
1896 copy_fields(s, s1, qps, superblock_count);
1905 static int vp3_decode_frame(AVCodecContext *avctx,
1906 void *data, int *data_size,
1909 const uint8_t *buf = avpkt->data;
1910 int buf_size = avpkt->size;
1911 Vp3DecodeContext *s = avctx->priv_data;
1915 init_get_bits(&gb, buf, buf_size * 8);
1917 if (s->theora && get_bits1(&gb))
1919 av_log(avctx, AV_LOG_ERROR, "Header packet passed to frame decoder, skipping\n");
1923 s->keyframe = !get_bits1(&gb);
1926 for (i = 0; i < 3; i++)
1927 s->last_qps[i] = s->qps[i];
1931 s->qps[s->nqps++]= get_bits(&gb, 6);
1932 } while(s->theora >= 0x030200 && s->nqps<3 && get_bits1(&gb));
1933 for (i = s->nqps; i < 3; i++)
1936 if (s->avctx->debug & FF_DEBUG_PICT_INFO)
1937 av_log(s->avctx, AV_LOG_INFO, " VP3 %sframe #%d: Q index = %d\n",
1938 s->keyframe?"key":"", avctx->frame_number+1, s->qps[0]);
1940 s->skip_loop_filter = !s->filter_limit_values[s->qps[0]] ||
1941 avctx->skip_loop_filter >= (s->keyframe ? AVDISCARD_ALL : AVDISCARD_NONKEY);
1943 if (s->qps[0] != s->last_qps[0])
1944 init_loop_filter(s);
1946 for (i = 0; i < s->nqps; i++)
1947 // reinit all dequantizers if the first one changed, because
1948 // the DC of the first quantizer must be used for all matrices
1949 if (s->qps[i] != s->last_qps[i] || s->qps[0] != s->last_qps[0])
1950 init_dequantizer(s, i);
1952 if (avctx->skip_frame >= AVDISCARD_NONKEY && !s->keyframe)
1955 s->current_frame.reference = 3;
1956 s->current_frame.pict_type = s->keyframe ? AV_PICTURE_TYPE_I : AV_PICTURE_TYPE_P;
1957 s->current_frame.key_frame = s->keyframe;
1958 if (ff_thread_get_buffer(avctx, &s->current_frame) < 0) {
1959 av_log(s->avctx, AV_LOG_ERROR, "get_buffer() failed\n");
1963 if (!s->edge_emu_buffer)
1964 s->edge_emu_buffer = av_malloc(9*FFABS(s->current_frame.linesize[0]));
1969 skip_bits(&gb, 4); /* width code */
1970 skip_bits(&gb, 4); /* height code */
1973 s->version = get_bits(&gb, 5);
1974 if (avctx->frame_number == 0)
1975 av_log(s->avctx, AV_LOG_DEBUG, "VP version: %d\n", s->version);
1978 if (s->version || s->theora)
1981 av_log(s->avctx, AV_LOG_ERROR, "Warning, unsupported keyframe coding type?!\n");
1982 skip_bits(&gb, 2); /* reserved? */
1985 if (!s->golden_frame.data[0]) {
1986 av_log(s->avctx, AV_LOG_WARNING, "vp3: first frame not a keyframe\n");
1988 s->golden_frame.reference = 3;
1989 s->golden_frame.pict_type = AV_PICTURE_TYPE_I;
1990 if (ff_thread_get_buffer(avctx, &s->golden_frame) < 0) {
1991 av_log(s->avctx, AV_LOG_ERROR, "get_buffer() failed\n");
1994 s->last_frame = s->golden_frame;
1995 s->last_frame.type = FF_BUFFER_TYPE_COPY;
1996 ff_thread_report_progress(&s->last_frame, INT_MAX, 0);
2000 memset(s->all_fragments, 0, s->fragment_count * sizeof(Vp3Fragment));
2001 ff_thread_finish_setup(avctx);
2003 if (unpack_superblocks(s, &gb)){
2004 av_log(s->avctx, AV_LOG_ERROR, "error in unpack_superblocks\n");
2007 if (unpack_modes(s, &gb)){
2008 av_log(s->avctx, AV_LOG_ERROR, "error in unpack_modes\n");
2011 if (unpack_vectors(s, &gb)){
2012 av_log(s->avctx, AV_LOG_ERROR, "error in unpack_vectors\n");
2015 if (unpack_block_qpis(s, &gb)){
2016 av_log(s->avctx, AV_LOG_ERROR, "error in unpack_block_qpis\n");
2019 if (unpack_dct_coeffs(s, &gb)){
2020 av_log(s->avctx, AV_LOG_ERROR, "error in unpack_dct_coeffs\n");
2024 for (i = 0; i < 3; i++) {
2025 int height = s->height >> (i && s->chroma_y_shift);
2026 if (s->flipped_image)
2027 s->data_offset[i] = 0;
2029 s->data_offset[i] = (height-1) * s->current_frame.linesize[i];
2032 s->last_slice_end = 0;
2033 for (i = 0; i < s->c_superblock_height; i++)
2036 // filter the last row
2037 for (i = 0; i < 3; i++) {
2038 int row = (s->height >> (3+(i && s->chroma_y_shift))) - 1;
2039 apply_loop_filter(s, i, row, row+1);
2041 vp3_draw_horiz_band(s, s->avctx->height);
2043 *data_size=sizeof(AVFrame);
2044 *(AVFrame*)data= s->current_frame;
2046 if (!HAVE_THREADS || !(s->avctx->active_thread_type&FF_THREAD_FRAME))
2047 update_frames(avctx);
2052 ff_thread_report_progress(&s->current_frame, INT_MAX, 0);
2054 if (!HAVE_THREADS || !(s->avctx->active_thread_type&FF_THREAD_FRAME))
2055 avctx->release_buffer(avctx, &s->current_frame);
2060 static int read_huffman_tree(AVCodecContext *avctx, GetBitContext *gb)
2062 Vp3DecodeContext *s = avctx->priv_data;
2064 if (get_bits1(gb)) {
2066 if (s->entries >= 32) { /* overflow */
2067 av_log(avctx, AV_LOG_ERROR, "huffman tree overflow\n");
2070 token = get_bits(gb, 5);
2071 //av_log(avctx, AV_LOG_DEBUG, "hti %d hbits %x token %d entry : %d size %d\n", s->hti, s->hbits, token, s->entries, s->huff_code_size);
2072 s->huffman_table[s->hti][token][0] = s->hbits;
2073 s->huffman_table[s->hti][token][1] = s->huff_code_size;
2077 if (s->huff_code_size >= 32) {/* overflow */
2078 av_log(avctx, AV_LOG_ERROR, "huffman tree overflow\n");
2081 s->huff_code_size++;
2083 if (read_huffman_tree(avctx, gb))
2086 if (read_huffman_tree(avctx, gb))
2089 s->huff_code_size--;
2094 static int vp3_init_thread_copy(AVCodecContext *avctx)
2096 Vp3DecodeContext *s = avctx->priv_data;
2098 s->superblock_coding = NULL;
2099 s->all_fragments = NULL;
2100 s->coded_fragment_list[0] = NULL;
2101 s->dct_tokens_base = NULL;
2102 s->superblock_fragments = NULL;
2103 s->macroblock_coding = NULL;
2104 s->motion_val[0] = NULL;
2105 s->motion_val[1] = NULL;
2106 s->edge_emu_buffer = NULL;
2111 #if CONFIG_THEORA_DECODER
2112 static const enum PixelFormat theora_pix_fmts[4] = {
2113 PIX_FMT_YUV420P, PIX_FMT_NONE, PIX_FMT_YUV422P, PIX_FMT_YUV444P
2116 static int theora_decode_header(AVCodecContext *avctx, GetBitContext *gb)
2118 Vp3DecodeContext *s = avctx->priv_data;
2119 int visible_width, visible_height, colorspace;
2120 int offset_x = 0, offset_y = 0;
2121 AVRational fps, aspect;
2123 s->theora = get_bits_long(gb, 24);
2124 av_log(avctx, AV_LOG_DEBUG, "Theora bitstream version %X\n", s->theora);
2126 /* 3.2.0 aka alpha3 has the same frame orientation as original vp3 */
2127 /* but previous versions have the image flipped relative to vp3 */
2128 if (s->theora < 0x030200)
2130 s->flipped_image = 1;
2131 av_log(avctx, AV_LOG_DEBUG, "Old (<alpha3) Theora bitstream, flipped image\n");
2134 visible_width = s->width = get_bits(gb, 16) << 4;
2135 visible_height = s->height = get_bits(gb, 16) << 4;
2137 if(av_image_check_size(s->width, s->height, 0, avctx)){
2138 av_log(avctx, AV_LOG_ERROR, "Invalid dimensions (%dx%d)\n", s->width, s->height);
2139 s->width= s->height= 0;
2143 if (s->theora >= 0x030200) {
2144 visible_width = get_bits_long(gb, 24);
2145 visible_height = get_bits_long(gb, 24);
2147 offset_x = get_bits(gb, 8); /* offset x */
2148 offset_y = get_bits(gb, 8); /* offset y, from bottom */
2151 fps.num = get_bits_long(gb, 32);
2152 fps.den = get_bits_long(gb, 32);
2153 if (fps.num && fps.den) {
2154 av_reduce(&avctx->time_base.num, &avctx->time_base.den,
2155 fps.den, fps.num, 1<<30);
2158 aspect.num = get_bits_long(gb, 24);
2159 aspect.den = get_bits_long(gb, 24);
2160 if (aspect.num && aspect.den) {
2161 av_reduce(&avctx->sample_aspect_ratio.num,
2162 &avctx->sample_aspect_ratio.den,
2163 aspect.num, aspect.den, 1<<30);
2166 if (s->theora < 0x030200)
2167 skip_bits(gb, 5); /* keyframe frequency force */
2168 colorspace = get_bits(gb, 8);
2169 skip_bits(gb, 24); /* bitrate */
2171 skip_bits(gb, 6); /* quality hint */
2173 if (s->theora >= 0x030200)
2175 skip_bits(gb, 5); /* keyframe frequency force */
2176 avctx->pix_fmt = theora_pix_fmts[get_bits(gb, 2)];
2177 skip_bits(gb, 3); /* reserved */
2180 // align_get_bits(gb);
2182 if ( visible_width <= s->width && visible_width > s->width-16
2183 && visible_height <= s->height && visible_height > s->height-16
2184 && !offset_x && (offset_y == s->height - visible_height))
2185 avcodec_set_dimensions(avctx, visible_width, visible_height);
2187 avcodec_set_dimensions(avctx, s->width, s->height);
2189 if (colorspace == 1) {
2190 avctx->color_primaries = AVCOL_PRI_BT470M;
2191 } else if (colorspace == 2) {
2192 avctx->color_primaries = AVCOL_PRI_BT470BG;
2194 if (colorspace == 1 || colorspace == 2) {
2195 avctx->colorspace = AVCOL_SPC_BT470BG;
2196 avctx->color_trc = AVCOL_TRC_BT709;
2202 static int theora_decode_tables(AVCodecContext *avctx, GetBitContext *gb)
2204 Vp3DecodeContext *s = avctx->priv_data;
2205 int i, n, matrices, inter, plane;
2207 if (s->theora >= 0x030200) {
2208 n = get_bits(gb, 3);
2209 /* loop filter limit values table */
2211 for (i = 0; i < 64; i++)
2212 s->filter_limit_values[i] = get_bits(gb, n);
2215 if (s->theora >= 0x030200)
2216 n = get_bits(gb, 4) + 1;
2219 /* quality threshold table */
2220 for (i = 0; i < 64; i++)
2221 s->coded_ac_scale_factor[i] = get_bits(gb, n);
2223 if (s->theora >= 0x030200)
2224 n = get_bits(gb, 4) + 1;
2227 /* dc scale factor table */
2228 for (i = 0; i < 64; i++)
2229 s->coded_dc_scale_factor[i] = get_bits(gb, n);
2231 if (s->theora >= 0x030200)
2232 matrices = get_bits(gb, 9) + 1;
2237 av_log(avctx, AV_LOG_ERROR, "invalid number of base matrixes\n");
2241 for(n=0; n<matrices; n++){
2242 for (i = 0; i < 64; i++)
2243 s->base_matrix[n][i]= get_bits(gb, 8);
2246 for (inter = 0; inter <= 1; inter++) {
2247 for (plane = 0; plane <= 2; plane++) {
2249 if (inter || plane > 0)
2250 newqr = get_bits1(gb);
2253 if(inter && get_bits1(gb)){
2257 qtj= (3*inter + plane - 1) / 3;
2258 plj= (plane + 2) % 3;
2260 s->qr_count[inter][plane]= s->qr_count[qtj][plj];
2261 memcpy(s->qr_size[inter][plane], s->qr_size[qtj][plj], sizeof(s->qr_size[0][0]));
2262 memcpy(s->qr_base[inter][plane], s->qr_base[qtj][plj], sizeof(s->qr_base[0][0]));
2268 i= get_bits(gb, av_log2(matrices-1)+1);
2270 av_log(avctx, AV_LOG_ERROR, "invalid base matrix index\n");
2273 s->qr_base[inter][plane][qri]= i;
2276 i = get_bits(gb, av_log2(63-qi)+1) + 1;
2277 s->qr_size[inter][plane][qri++]= i;
2282 av_log(avctx, AV_LOG_ERROR, "invalid qi %d > 63\n", qi);
2285 s->qr_count[inter][plane]= qri;
2290 /* Huffman tables */
2291 for (s->hti = 0; s->hti < 80; s->hti++) {
2293 s->huff_code_size = 1;
2294 if (!get_bits1(gb)) {
2296 if(read_huffman_tree(avctx, gb))
2299 if(read_huffman_tree(avctx, gb))
2304 s->theora_tables = 1;
2309 static av_cold int theora_decode_init(AVCodecContext *avctx)
2311 Vp3DecodeContext *s = avctx->priv_data;
2314 uint8_t *header_start[3];
2318 avctx->pix_fmt = PIX_FMT_YUV420P;
2322 if (!avctx->extradata_size)
2324 av_log(avctx, AV_LOG_ERROR, "Missing extradata!\n");
2328 if (avpriv_split_xiph_headers(avctx->extradata, avctx->extradata_size,
2329 42, header_start, header_len) < 0) {
2330 av_log(avctx, AV_LOG_ERROR, "Corrupt extradata\n");
2335 init_get_bits(&gb, header_start[i], header_len[i] * 8);
2337 ptype = get_bits(&gb, 8);
2339 if (!(ptype & 0x80))
2341 av_log(avctx, AV_LOG_ERROR, "Invalid extradata!\n");
2345 // FIXME: Check for this as well.
2346 skip_bits_long(&gb, 6*8); /* "theora" */
2351 theora_decode_header(avctx, &gb);
2354 // FIXME: is this needed? it breaks sometimes
2355 // theora_decode_comments(avctx, gb);
2358 if (theora_decode_tables(avctx, &gb))
2362 av_log(avctx, AV_LOG_ERROR, "Unknown Theora config packet: %d\n", ptype&~0x80);
2365 if(ptype != 0x81 && 8*header_len[i] != get_bits_count(&gb))
2366 av_log(avctx, AV_LOG_WARNING, "%d bits left in packet %X\n", 8*header_len[i] - get_bits_count(&gb), ptype);
2367 if (s->theora < 0x030200)
2371 return vp3_decode_init(avctx);
2374 AVCodec ff_theora_decoder = {
2376 .type = AVMEDIA_TYPE_VIDEO,
2377 .id = CODEC_ID_THEORA,
2378 .priv_data_size = sizeof(Vp3DecodeContext),
2379 .init = theora_decode_init,
2380 .close = vp3_decode_end,
2381 .decode = vp3_decode_frame,
2382 .capabilities = CODEC_CAP_DR1 | CODEC_CAP_DRAW_HORIZ_BAND |
2383 CODEC_CAP_FRAME_THREADS,
2384 .flush = vp3_decode_flush,
2385 .long_name = NULL_IF_CONFIG_SMALL("Theora"),
2386 .init_thread_copy = ONLY_IF_THREADS_ENABLED(vp3_init_thread_copy),
2387 .update_thread_context = ONLY_IF_THREADS_ENABLED(vp3_update_thread_context)
2391 AVCodec ff_vp3_decoder = {
2393 .type = AVMEDIA_TYPE_VIDEO,
2395 .priv_data_size = sizeof(Vp3DecodeContext),
2396 .init = vp3_decode_init,
2397 .close = vp3_decode_end,
2398 .decode = vp3_decode_frame,
2399 .capabilities = CODEC_CAP_DR1 | CODEC_CAP_DRAW_HORIZ_BAND |
2400 CODEC_CAP_FRAME_THREADS,
2401 .flush = vp3_decode_flush,
2402 .long_name = NULL_IF_CONFIG_SMALL("On2 VP3"),
2403 .init_thread_copy = ONLY_IF_THREADS_ENABLED(vp3_init_thread_copy),
2404 .update_thread_context = ONLY_IF_THREADS_ENABLED(vp3_update_thread_context),