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[libav.git] / libavcodec / vp3.c
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d86053a4 1/*
67335dbc 2 * Copyright (C) 2003-2004 the ffmpeg project
d86053a4 3 *
b78e7197
DB		 4 * This file is part of FFmpeg.
5 *
6 * FFmpeg is free software; you can redistribute it and/or
d86053a4
MM		 7 * modify it under the terms of the GNU Lesser General Public
8 * License as published by the Free Software Foundation; either
b78e7197 9 * version 2.1 of the License, or (at your option) any later version.
d86053a4 10 *
b78e7197 11 * FFmpeg is distributed in the hope that it will be useful,
d86053a4
MM		 12 * but WITHOUT ANY WARRANTY; without even the implied warranty of
13 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
14 * Lesser General Public License for more details.
15 *
16 * You should have received a copy of the GNU Lesser General Public
b78e7197 17 * License along with FFmpeg; if not, write to the Free Software
5509bffa 18 * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA
d86053a4
MM		 19 */
20
21/**
22 * @file vp3.c
23 * On2 VP3 Video Decoder
0ad72bdd
MM		 24 *
25 * VP3 Video Decoder by Mike Melanson (mike at multimedia.cx)
26 * For more information about the VP3 coding process, visit:
9db5bdfa 27 * http://wiki.multimedia.cx/index.php?title=On2_VP3
0ad72bdd
MM		 28 *
29 * Theora decoder by Alex Beregszaszi
d86053a4
MM		 30 */
31
32#include <stdio.h>
33#include <stdlib.h>
34#include <string.h>
35#include <unistd.h>
36
d86053a4
MM		 37#include "avcodec.h"
38#include "dsputil.h"
d37f007d 39#include "bitstream.h"
d86053a4
MM		 40
41#include "vp3data.h"
da91ed59 42#include "xiph.h"
d86053a4
MM		 43
44#define FRAGMENT_PIXELS 8
45
7beddb12
MN		 46typedef struct Coeff {
47 struct Coeff *next;
48 DCTELEM coeff;
49 uint8_t index;
50} Coeff;
51
52//FIXME split things out into their own arrays
d86053a4 53typedef struct Vp3Fragment {
7beddb12 54 Coeff *next_coeff;
d86053a4
MM		 55 /* address of first pixel taking into account which plane the fragment
56 * lives on as well as the plane stride */
57 int first_pixel;
58 /* this is the macroblock that the fragment belongs to */
288774bb
MN		 59 uint16_t macroblock;
60 uint8_t coding_method;
288774bb
MN		 61 int8_t motion_x;
62 int8_t motion_y;
d86053a4
MM		 63} Vp3Fragment;
64
65#define SB_NOT_CODED 0
66#define SB_PARTIALLY_CODED 1
67#define SB_FULLY_CODED 2
68
69#define MODE_INTER_NO_MV 0
70#define MODE_INTRA 1
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
78
79/* special internal mode */
80#define MODE_COPY 8
81
82/* There are 6 preset schemes, plus a free-form scheme */
e8e47435 83static const int ModeAlphabet[6][CODING_MODE_COUNT] =
d86053a4 84{
d86053a4 85 /* scheme 1: Last motion vector dominates */
115329f1 86 { MODE_INTER_LAST_MV, MODE_INTER_PRIOR_LAST,
d86053a4 87 MODE_INTER_PLUS_MV, MODE_INTER_NO_MV,
115329f1 88 MODE_INTRA, MODE_USING_GOLDEN,
d86053a4
MM		 89 MODE_GOLDEN_MV, MODE_INTER_FOURMV },
90
91 /* scheme 2 */
115329f1 92 { MODE_INTER_LAST_MV, MODE_INTER_PRIOR_LAST,
d86053a4 93 MODE_INTER_NO_MV, MODE_INTER_PLUS_MV,
115329f1 94 MODE_INTRA, MODE_USING_GOLDEN,
d86053a4
MM		 95 MODE_GOLDEN_MV, MODE_INTER_FOURMV },
96
97 /* scheme 3 */
115329f1 98 { MODE_INTER_LAST_MV, MODE_INTER_PLUS_MV,
d86053a4 99 MODE_INTER_PRIOR_LAST, MODE_INTER_NO_MV,
115329f1 100 MODE_INTRA, MODE_USING_GOLDEN,
d86053a4
MM		 101 MODE_GOLDEN_MV, MODE_INTER_FOURMV },
102
103 /* scheme 4 */
115329f1 104 { MODE_INTER_LAST_MV, MODE_INTER_PLUS_MV,
d86053a4 105 MODE_INTER_NO_MV, MODE_INTER_PRIOR_LAST,
115329f1 106 MODE_INTRA, MODE_USING_GOLDEN,
d86053a4
MM		 107 MODE_GOLDEN_MV, MODE_INTER_FOURMV },
108
109 /* scheme 5: No motion vector dominates */
115329f1 110 { MODE_INTER_NO_MV, MODE_INTER_LAST_MV,
d86053a4 111 MODE_INTER_PRIOR_LAST, MODE_INTER_PLUS_MV,
115329f1 112 MODE_INTRA, MODE_USING_GOLDEN,
d86053a4
MM		 113 MODE_GOLDEN_MV, MODE_INTER_FOURMV },
114
115 /* scheme 6 */
115329f1 116 { MODE_INTER_NO_MV, MODE_USING_GOLDEN,
d86053a4 117 MODE_INTER_LAST_MV, MODE_INTER_PRIOR_LAST,
115329f1 118 MODE_INTER_PLUS_MV, MODE_INTRA,
d86053a4
MM		 119 MODE_GOLDEN_MV, MODE_INTER_FOURMV },
120
121};
122
123#define MIN_DEQUANT_VAL 2
124
125typedef struct Vp3DecodeContext {
126 AVCodecContext *avctx;
f44ee2c3 127 int theora, theora_tables;
3c3f113e 128 int version;
d86053a4 129 int width, height;
d86053a4
MM		 130 AVFrame golden_frame;
131 AVFrame last_frame;
132 AVFrame current_frame;
133 int keyframe;
134 DSPContext dsp;
9a7ad925 135 int flipped_image;
d86053a4 136
efea8528
MN		 137 int qis[3];
138 int nqis;
d86053a4
MM		 139 int quality_index;
140 int last_quality_index;
141
142 int superblock_count;
143 int superblock_width;
144 int superblock_height;
892fc83e
MM		 145 int y_superblock_width;
146 int y_superblock_height;
147 int c_superblock_width;
148 int c_superblock_height;
d86053a4
MM		 149 int u_superblock_start;
150 int v_superblock_start;
151 unsigned char *superblock_coding;
152
153 int macroblock_count;
154 int macroblock_width;
155 int macroblock_height;
156
157 int fragment_count;
158 int fragment_width;
159 int fragment_height;
160
161 Vp3Fragment *all_fragments;
36e16253 162 uint8_t *coeff_counts;
7beddb12
MN		 163 Coeff *coeffs;
164 Coeff *next_coeff;
1abbf64e 165 int fragment_start[3];
115329f1 166
36af0c95 167 ScanTable scantable;
115329f1 168
f44ee2c3
AB		 169 /* tables */
170 uint16_t coded_dc_scale_factor[64];
67335dbc 171 uint32_t coded_ac_scale_factor[64];
ae1dd8e1
MN		 172 uint8_t base_matrix[384][64];
173 uint8_t qr_count[2][3];
174 uint8_t qr_size [2][3][64];
175 uint16_t qr_base[2][3][64];
d86053a4 176
f4433de9 177 /* this is a list of indexes into the all_fragments array indicating
d86053a4
MM		 178 * which of the fragments are coded */
179 int *coded_fragment_list;
180 int coded_fragment_list_index;
5e534865 181 int pixel_addresses_initialized;
d86053a4
MM		 182
183 VLC dc_vlc[16];
184 VLC ac_vlc_1[16];
185 VLC ac_vlc_2[16];
186 VLC ac_vlc_3[16];
187 VLC ac_vlc_4[16];
188
0ad72bdd
MM		 189 VLC superblock_run_length_vlc;
190 VLC fragment_run_length_vlc;
191 VLC mode_code_vlc;
192 VLC motion_vector_vlc;
193
38acbc3c
MM		 194 /* these arrays need to be on 16-byte boundaries since SSE2 operations
195 * index into them */
187c9be7 196 DECLARE_ALIGNED_16(int16_t, qmat[2][4][64]); //<qmat[is_inter][plane]
d86053a4
MM		 197
198 /* This table contains superblock_count * 16 entries. Each set of 16
f4433de9 199 * numbers corresponds to the fragment indexes 0..15 of the superblock.
d86053a4
MM		 200 * An entry will be -1 to indicate that no entry corresponds to that
201 * index. */
202 int *superblock_fragments;
203
204 /* This table contains superblock_count * 4 entries. Each set of 4
f4433de9 205 * numbers corresponds to the macroblock indexes 0..3 of the superblock.
d86053a4
MM		 206 * An entry will be -1 to indicate that no entry corresponds to that
207 * index. */
208 int *superblock_macroblocks;
209
210 /* This table contains macroblock_count * 6 entries. Each set of 6
f4433de9 211 * numbers corresponds to the fragment indexes 0..5 which comprise
d86053a4
MM		 212 * the macroblock (4 Y fragments and 2 C fragments). */
213 int *macroblock_fragments;
115329f1 214 /* This is an array that indicates how a particular macroblock
74c0ac12 215 * is coded. */
96a7e73b 216 unsigned char *macroblock_coding;
d86053a4 217
04331882
MM		 218 int first_coded_y_fragment;
219 int first_coded_c_fragment;
220 int last_coded_y_fragment;
221 int last_coded_c_fragment;
222
a2f11b3c 223 uint8_t edge_emu_buffer[9*2048]; //FIXME dynamic alloc
191e8ca7 224 int8_t qscale_table[2048]; //FIXME dynamic alloc (width+15)/16
39922395 225
f44b08a5
MM		 226 /* Huffman decode */
227 int hti;
228 unsigned int hbits;
229 int entries;
230 int huff_code_size;
231 uint16_t huffman_table[80][32][2];
232
51ace577 233 uint8_t filter_limit_values[64];
f44b08a5 234 int bounding_values_array[256];
d86053a4
MM		 235} Vp3DecodeContext;
236
237/************************************************************************
238 * VP3 specific functions
239 ************************************************************************/
240
241/*
242 * This function sets up all of the various blocks mappings:
243 * superblocks <-> fragments, macroblocks <-> fragments,
244 * superblocks <-> macroblocks
892fc83e
MM		 245 *
246 * Returns 0 is successful; returns 1 if *anything* went wrong.
d86053a4 247 */
115329f1 248static int init_block_mapping(Vp3DecodeContext *s)
d86053a4
MM		 249{
250 int i, j;
d86053a4
MM		 251 signed int hilbert_walk_mb[4];
252
253 int current_fragment = 0;
254 int current_width = 0;
255 int current_height = 0;
256 int right_edge = 0;
257 int bottom_edge = 0;
258 int superblock_row_inc = 0;
259 int *hilbert = NULL;
260 int mapping_index = 0;
261
262 int current_macroblock;
263 int c_fragment;
264
265 signed char travel_width[16] = {
115329f1 266 1, 1, 0, -1,
d86053a4
MM		 267 0, 0, 1, 0,
268 1, 0, 1, 0,
269 0, -1, 0, 1
270 };
271
272 signed char travel_height[16] = {
273 0, 0, 1, 0,
274 1, 1, 0, -1,
275 0, 1, 0, -1,
276 -1, 0, -1, 0
277 };
278
279 signed char travel_width_mb[4] = {
280 1, 0, 1, 0
281 };
282
283 signed char travel_height_mb[4] = {
284 0, 1, 0, -1
285 };
286
d86053a4
MM		 287 hilbert_walk_mb[0] = 1;
288 hilbert_walk_mb[1] = s->macroblock_width;
289 hilbert_walk_mb[2] = 1;
290 hilbert_walk_mb[3] = -s->macroblock_width;
291
292 /* iterate through each superblock (all planes) and map the fragments */
293 for (i = 0; i < s->superblock_count; i++) {
d86053a4
MM		 294 /* time to re-assign the limits? */
295 if (i == 0) {
296
297 /* start of Y superblocks */
298 right_edge = s->fragment_width;
299 bottom_edge = s->fragment_height;
892fc83e 300 current_width = -1;
d86053a4 301 current_height = 0;
115329f1 302 superblock_row_inc = 3 * s->fragment_width -
892fc83e 303 (s->y_superblock_width * 4 - s->fragment_width);
d86053a4
MM		 304
305 /* the first operation for this variable is to advance by 1 */
306 current_fragment = -1;
307
308 } else if (i == s->u_superblock_start) {
309
310 /* start of U superblocks */
311 right_edge = s->fragment_width / 2;
312 bottom_edge = s->fragment_height / 2;
892fc83e 313 current_width = -1;
d86053a4 314 current_height = 0;
115329f1 315 superblock_row_inc = 3 * (s->fragment_width / 2) -
892fc83e 316 (s->c_superblock_width * 4 - s->fragment_width / 2);
d86053a4
MM		 317
318 /* the first operation for this variable is to advance by 1 */
1abbf64e 319 current_fragment = s->fragment_start[1] - 1;
d86053a4
MM		 320
321 } else if (i == s->v_superblock_start) {
322
323 /* start of V superblocks */
324 right_edge = s->fragment_width / 2;
325 bottom_edge = s->fragment_height / 2;
892fc83e 326 current_width = -1;
d86053a4 327 current_height = 0;
115329f1 328 superblock_row_inc = 3 * (s->fragment_width / 2) -
892fc83e 329 (s->c_superblock_width * 4 - s->fragment_width / 2);
d86053a4
MM		 330
331 /* the first operation for this variable is to advance by 1 */
1abbf64e 332 current_fragment = s->fragment_start[2] - 1;
d86053a4
MM		 333
334 }
335
892fc83e 336 if (current_width >= right_edge - 1) {
d86053a4 337 /* reset width and move to next superblock row */
892fc83e 338 current_width = -1;
d86053a4
MM		 339 current_height += 4;
340
341 /* fragment is now at the start of a new superblock row */
342 current_fragment += superblock_row_inc;
343 }
344
345 /* iterate through all 16 fragments in a superblock */
346 for (j = 0; j < 16; j++) {
684d9e36 347 current_fragment += travel_width[j] + right_edge * travel_height[j];
892fc83e 348 current_width += travel_width[j];
d86053a4
MM		 349 current_height += travel_height[j];
350
351 /* check if the fragment is in bounds */
892fc83e 352 if ((current_width < right_edge) &&
d86053a4
MM		 353 (current_height < bottom_edge)) {
354 s->superblock_fragments[mapping_index] = current_fragment;
d86053a4
MM		 355 } else {
356 s->superblock_fragments[mapping_index] = -1;
d86053a4
MM		 357 }
358
d86053a4
MM		 359 mapping_index++;
360 }
361 }
362
363 /* initialize the superblock <-> macroblock mapping; iterate through
364 * all of the Y plane superblocks to build this mapping */
365 right_edge = s->macroblock_width;
366 bottom_edge = s->macroblock_height;
892fc83e 367 current_width = -1;
d86053a4 368 current_height = 0;
892fc83e 369 superblock_row_inc = s->macroblock_width -
cea96420 370 (s->y_superblock_width * 2 - s->macroblock_width);
d86053a4
MM		 371 hilbert = hilbert_walk_mb;
372 mapping_index = 0;
373 current_macroblock = -1;
374 for (i = 0; i < s->u_superblock_start; i++) {
375
96a7e73b 376 if (current_width >= right_edge - 1) {
d86053a4 377 /* reset width and move to next superblock row */
96a7e73b 378 current_width = -1;
d86053a4
MM		 379 current_height += 2;
380
381 /* macroblock is now at the start of a new superblock row */
382 current_macroblock += superblock_row_inc;
383 }
384
385 /* iterate through each potential macroblock in the superblock */
386 for (j = 0; j < 4; j++) {
387 current_macroblock += hilbert_walk_mb[j];
892fc83e 388 current_width += travel_width_mb[j];
d86053a4
MM		 389 current_height += travel_height_mb[j];
390
391 /* check if the macroblock is in bounds */
892fc83e 392 if ((current_width < right_edge) &&
d86053a4
MM		 393 (current_height < bottom_edge)) {
394 s->superblock_macroblocks[mapping_index] = current_macroblock;
d86053a4
MM		 395 } else {
396 s->superblock_macroblocks[mapping_index] = -1;
d86053a4
MM		 397 }
398
d86053a4
MM		 399 mapping_index++;
400 }
401 }
402
403 /* initialize the macroblock <-> fragment mapping */
404 current_fragment = 0;
405 current_macroblock = 0;
406 mapping_index = 0;
407 for (i = 0; i < s->fragment_height; i += 2) {
408
409 for (j = 0; j < s->fragment_width; j += 2) {
410
d86053a4
MM		 411 s->all_fragments[current_fragment].macroblock = current_macroblock;
412 s->macroblock_fragments[mapping_index++] = current_fragment;
d86053a4
MM		 413
414 if (j + 1 < s->fragment_width) {
415 s->all_fragments[current_fragment + 1].macroblock = current_macroblock;
416 s->macroblock_fragments[mapping_index++] = current_fragment + 1;
d86053a4
MM		 417 } else
418 s->macroblock_fragments[mapping_index++] = -1;
419
420 if (i + 1 < s->fragment_height) {
115329f1 421 s->all_fragments[current_fragment + s->fragment_width].macroblock =
d86053a4 422 current_macroblock;
115329f1 423 s->macroblock_fragments[mapping_index++] =
d86053a4 424 current_fragment + s->fragment_width;
d86053a4
MM		 425 } else
426 s->macroblock_fragments[mapping_index++] = -1;
427
428 if ((j + 1 < s->fragment_width) && (i + 1 < s->fragment_height)) {
115329f1 429 s->all_fragments[current_fragment + s->fragment_width + 1].macroblock =
d86053a4 430 current_macroblock;
115329f1 431 s->macroblock_fragments[mapping_index++] =
d86053a4 432 current_fragment + s->fragment_width + 1;
d86053a4
MM		 433 } else
434 s->macroblock_fragments[mapping_index++] = -1;
435
436 /* C planes */
1abbf64e 437 c_fragment = s->fragment_start[1] +
d86053a4 438 (i * s->fragment_width / 4) + (j / 2);
892fc83e 439 s->all_fragments[c_fragment].macroblock = s->macroblock_count;
d86053a4 440 s->macroblock_fragments[mapping_index++] = c_fragment;
d86053a4 441
1abbf64e 442 c_fragment = s->fragment_start[2] +
d86053a4 443 (i * s->fragment_width / 4) + (j / 2);
892fc83e 444 s->all_fragments[c_fragment].macroblock = s->macroblock_count;
d86053a4 445 s->macroblock_fragments[mapping_index++] = c_fragment;
d86053a4
MM		 446
447 if (j + 2 <= s->fragment_width)
448 current_fragment += 2;
115329f1 449 else
d86053a4
MM		 450 current_fragment++;
451 current_macroblock++;
452 }
453
454 current_fragment += s->fragment_width;
455 }
892fc83e
MM		 456
457 return 0; /* successful path out */
d86053a4
MM		 458}
459
460/*
d86053a4
MM		 461 * This function wipes out all of the fragment data.
462 */
463static void init_frame(Vp3DecodeContext *s, GetBitContext *gb)
464{
465 int i;
466
467 /* zero out all of the fragment information */
468 s->coded_fragment_list_index = 0;
469 for (i = 0; i < s->fragment_count; i++) {
36e16253 470 s->coeff_counts[i] = 0;
7dc9ed11
MM		 471 s->all_fragments[i].motion_x = 127;
472 s->all_fragments[i].motion_y = 127;
473 s->all_fragments[i].next_coeff= NULL;
7beddb12
MN		 474 s->coeffs[i].index=
475 s->coeffs[i].coeff=0;
476 s->coeffs[i].next= NULL;
d86053a4
MM		 477 }
478}
479
480/*
f44b08a5 481 * This function sets up the dequantization tables used for a particular
d86053a4
MM		 482 * frame.
483 */
484static void init_dequantizer(Vp3DecodeContext *s)
485{
67335dbc 486 int ac_scale_factor = s->coded_ac_scale_factor[s->quality_index];
f44ee2c3 487 int dc_scale_factor = s->coded_dc_scale_factor[s->quality_index];
36c32bdd 488 int i, plane, inter, qri, bmi, bmj, qistart;
d86053a4 489
ae1dd8e1
MN		 490 for(inter=0; inter<2; inter++){
491 for(plane=0; plane<3; plane++){
492 int sum=0;
493 for(qri=0; qri<s->qr_count[inter][plane]; qri++){
494 sum+= s->qr_size[inter][plane][qri];
495 if(s->quality_index <= sum)
496 break;
497 }
498 qistart= sum - s->qr_size[inter][plane][qri];
499 bmi= s->qr_base[inter][plane][qri ];
500 bmj= s->qr_base[inter][plane][qri+1];
501 for(i=0; i<64; i++){
502 int coeff= ( 2*(sum -s->quality_index)*s->base_matrix[bmi][i]
503 - 2*(qistart-s->quality_index)*s->base_matrix[bmj][i]
504 + s->qr_size[inter][plane][qri])
505 / (2*s->qr_size[inter][plane][qri]);
506
a14ab4e4 507 int qmin= 8<<(inter + !i);
ae1dd8e1
MN		 508 int qscale= i ? ac_scale_factor : dc_scale_factor;
509
7f065b36 510 s->qmat[inter][plane][s->dsp.idct_permutation[i]]= av_clip((qscale * coeff)/100 * 4, qmin, 4096);
ae1dd8e1
MN		 511 }
512 }
d86053a4 513 }
115329f1 514
187c9be7 515 memset(s->qscale_table, (FFMAX(s->qmat[0][0][1], s->qmat[0][1][1])+8)/16, 512); //FIXME finetune
d86053a4
MM		 516}
517
518/*
f44b08a5
MM		 519 * This function initializes the loop filter boundary limits if the frame's
520 * quality index is different from the previous frame's.
521 */
522static void init_loop_filter(Vp3DecodeContext *s)
523{
524 int *bounding_values= s->bounding_values_array+127;
525 int filter_limit;
526 int x;
527
528 filter_limit = s->filter_limit_values[s->quality_index];
529
530 /* set up the bounding values */
531 memset(s->bounding_values_array, 0, 256 * sizeof(int));
532 for (x = 0; x < filter_limit; x++) {
533 bounding_values[-x - filter_limit] = -filter_limit + x;
534 bounding_values[-x] = -x;
535 bounding_values[x] = x;
536 bounding_values[x + filter_limit] = filter_limit - x;
537 }
538}
539
540/*
115329f1 541 * This function unpacks all of the superblock/macroblock/fragment coding
d86053a4
MM		 542 * information from the bitstream.
543 */
892fc83e 544static int unpack_superblocks(Vp3DecodeContext *s, GetBitContext *gb)
d86053a4
MM		 545{
546 int bit = 0;
547 int current_superblock = 0;
548 int current_run = 0;
549 int decode_fully_flags = 0;
550 int decode_partial_blocks = 0;
22493ab9 551 int first_c_fragment_seen;
d86053a4
MM		 552
553 int i, j;
554 int current_fragment;
555
d86053a4 556 if (s->keyframe) {
d86053a4
MM		 557 memset(s->superblock_coding, SB_FULLY_CODED, s->superblock_count);
558
559 } else {
560
561 /* unpack the list of partially-coded superblocks */
5fc32c27 562 bit = get_bits1(gb);
115329f1 563 /* toggle the bit because as soon as the first run length is
d86053a4
MM		 564 * fetched the bit will be toggled again */
565 bit ^= 1;
566 while (current_superblock < s->superblock_count) {
b5da3635 567 if (current_run-- == 0) {
d86053a4 568 bit ^= 1;
115329f1 569 current_run = get_vlc2(gb,
b5da3635
MN		 570 s->superblock_run_length_vlc.table, 6, 2);
571 if (current_run == 33)
d8278bab 572 current_run += get_bits(gb, 12);
d86053a4
MM		 573
574 /* if any of the superblocks are not partially coded, flag
575 * a boolean to decode the list of fully-coded superblocks */
642d7e84 576 if (bit == 0) {
d86053a4 577 decode_fully_flags = 1;
642d7e84 578 } else {
d86053a4 579
642d7e84
MM		 580 /* make a note of the fact that there are partially coded
581 * superblocks */
582 decode_partial_blocks = 1;
583 }
d86053a4 584 }
b5da3635 585 s->superblock_coding[current_superblock++] = bit;
d86053a4
MM		 586 }
587
588 /* unpack the list of fully coded superblocks if any of the blocks were
589 * not marked as partially coded in the previous step */
590 if (decode_fully_flags) {
591
592 current_superblock = 0;
593 current_run = 0;
5fc32c27 594 bit = get_bits1(gb);
115329f1 595 /* toggle the bit because as soon as the first run length is
d86053a4
MM		 596 * fetched the bit will be toggled again */
597 bit ^= 1;
598 while (current_superblock < s->superblock_count) {
599
600 /* skip any superblocks already marked as partially coded */
601 if (s->superblock_coding[current_superblock] == SB_NOT_CODED) {
602
b5da3635 603 if (current_run-- == 0) {
d86053a4 604 bit ^= 1;
115329f1 605 current_run = get_vlc2(gb,
b5da3635
MN		 606 s->superblock_run_length_vlc.table, 6, 2);
607 if (current_run == 33)
d8278bab 608 current_run += get_bits(gb, 12);
d86053a4 609 }
b5da3635 610 s->superblock_coding[current_superblock] = 2*bit;
d86053a4
MM		 611 }
612 current_superblock++;
613 }
614 }
615
616 /* if there were partial blocks, initialize bitstream for
617 * unpacking fragment codings */
618 if (decode_partial_blocks) {
619
620 current_run = 0;
5fc32c27 621 bit = get_bits1(gb);
115329f1 622 /* toggle the bit because as soon as the first run length is
d86053a4
MM		 623 * fetched the bit will be toggled again */
624 bit ^= 1;
625 }
626 }
627
628 /* figure out which fragments are coded; iterate through each
629 * superblock (all planes) */
630 s->coded_fragment_list_index = 0;
7beddb12 631 s->next_coeff= s->coeffs + s->fragment_count;
04331882
MM		 632 s->first_coded_y_fragment = s->first_coded_c_fragment = 0;
633 s->last_coded_y_fragment = s->last_coded_c_fragment = -1;
22493ab9 634 first_c_fragment_seen = 0;
96a7e73b 635 memset(s->macroblock_coding, MODE_COPY, s->macroblock_count);
d86053a4
MM		 636 for (i = 0; i < s->superblock_count; i++) {
637
638 /* iterate through all 16 fragments in a superblock */
639 for (j = 0; j < 16; j++) {
640
641 /* if the fragment is in bounds, check its coding status */
642 current_fragment = s->superblock_fragments[i * 16 + j];
892fc83e 643 if (current_fragment >= s->fragment_count) {
9b879566 644 av_log(s->avctx, AV_LOG_ERROR, " vp3:unpack_superblocks(): bad fragment number (%d >= %d)\n",
892fc83e
MM		 645 current_fragment, s->fragment_count);
646 return 1;
647 }
d86053a4
MM		 648 if (current_fragment != -1) {
649 if (s->superblock_coding[i] == SB_NOT_CODED) {
650
651 /* copy all the fragments from the prior frame */
115329f1 652 s->all_fragments[current_fragment].coding_method =
d86053a4
MM		 653 MODE_COPY;
654
655 } else if (s->superblock_coding[i] == SB_PARTIALLY_CODED) {
656
657 /* fragment may or may not be coded; this is the case
658 * that cares about the fragment coding runs */
b5da3635 659 if (current_run-- == 0) {
d86053a4 660 bit ^= 1;
115329f1 661 current_run = get_vlc2(gb,
b5da3635 662 s->fragment_run_length_vlc.table, 5, 2);
d86053a4
MM		 663 }
664
665 if (bit) {
115329f1 666 /* default mode; actual mode will be decoded in
22493ab9 667 * the next phase */
115329f1 668 s->all_fragments[current_fragment].coding_method =
d86053a4 669 MODE_INTER_NO_MV;
7beddb12 670 s->all_fragments[current_fragment].next_coeff= s->coeffs + current_fragment;
115329f1 671 s->coded_fragment_list[s->coded_fragment_list_index] =
d86053a4 672 current_fragment;
1abbf64e 673 if ((current_fragment >= s->fragment_start[1]) &&
22493ab9
MM		 674 (s->last_coded_y_fragment == -1) &&
675 (!first_c_fragment_seen)) {
04331882
MM		 676 s->first_coded_c_fragment = s->coded_fragment_list_index;
677 s->last_coded_y_fragment = s->first_coded_c_fragment - 1;
22493ab9 678 first_c_fragment_seen = 1;
04331882
MM		 679 }
680 s->coded_fragment_list_index++;
96a7e73b 681 s->macroblock_coding[s->all_fragments[current_fragment].macroblock] = MODE_INTER_NO_MV;
d86053a4
MM		 682 } else {
683 /* not coded; copy this fragment from the prior frame */
684 s->all_fragments[current_fragment].coding_method =
685 MODE_COPY;
d86053a4
MM		 686 }
687
d86053a4
MM		 688 } else {
689
690 /* fragments are fully coded in this superblock; actual
691 * coding will be determined in next step */
115329f1 692 s->all_fragments[current_fragment].coding_method =
d86053a4 693 MODE_INTER_NO_MV;
7beddb12 694 s->all_fragments[current_fragment].next_coeff= s->coeffs + current_fragment;
115329f1 695 s->coded_fragment_list[s->coded_fragment_list_index] =
d86053a4 696 current_fragment;
1abbf64e 697 if ((current_fragment >= s->fragment_start[1]) &&
22493ab9
MM		 698 (s->last_coded_y_fragment == -1) &&
699 (!first_c_fragment_seen)) {
04331882
MM		 700 s->first_coded_c_fragment = s->coded_fragment_list_index;
701 s->last_coded_y_fragment = s->first_coded_c_fragment - 1;
22493ab9 702 first_c_fragment_seen = 1;
04331882
MM		 703 }
704 s->coded_fragment_list_index++;
96a7e73b 705 s->macroblock_coding[s->all_fragments[current_fragment].macroblock] = MODE_INTER_NO_MV;
d86053a4
MM		 706 }
707 }
708 }
709 }
04331882 710
22493ab9
MM		 711 if (!first_c_fragment_seen)
712 /* only Y fragments coded in this frame */
04331882 713 s->last_coded_y_fragment = s->coded_fragment_list_index - 1;
115329f1 714 else
642d7e84 715 /* end the list of coded C fragments */
04331882 716 s->last_coded_c_fragment = s->coded_fragment_list_index - 1;
22493ab9 717
892fc83e 718 return 0;
d86053a4
MM		 719}
720
721/*
722 * This function unpacks all the coding mode data for individual macroblocks
723 * from the bitstream.
724 */
892fc83e 725static int unpack_modes(Vp3DecodeContext *s, GetBitContext *gb)
d86053a4
MM		 726{
727 int i, j, k;
728 int scheme;
729 int current_macroblock;
730 int current_fragment;
731 int coding_mode;
e8e47435 732 int custom_mode_alphabet[CODING_MODE_COUNT];
d86053a4 733
d86053a4 734 if (s->keyframe) {
d86053a4
MM		 735 for (i = 0; i < s->fragment_count; i++)
736 s->all_fragments[i].coding_method = MODE_INTRA;
737
738 } else {
739
740 /* fetch the mode coding scheme for this frame */
741 scheme = get_bits(gb, 3);
d86053a4
MM		 742
743 /* is it a custom coding scheme? */
744 if (scheme == 0) {
d86053a4 745 for (i = 0; i < 8; i++)
e8e47435 746 custom_mode_alphabet[get_bits(gb, 3)] = i;
d86053a4
MM		 747 }
748
d86053a4
MM		 749 /* iterate through all of the macroblocks that contain 1 or more
750 * coded fragments */
751 for (i = 0; i < s->u_superblock_start; i++) {
752
753 for (j = 0; j < 4; j++) {
754 current_macroblock = s->superblock_macroblocks[i * 4 + j];
755 if ((current_macroblock == -1) ||
96a7e73b 756 (s->macroblock_coding[current_macroblock] == MODE_COPY))
d86053a4 757 continue;
892fc83e 758 if (current_macroblock >= s->macroblock_count) {
9b879566 759 av_log(s->avctx, AV_LOG_ERROR, " vp3:unpack_modes(): bad macroblock number (%d >= %d)\n",
892fc83e
MM		 760 current_macroblock, s->macroblock_count);
761 return 1;
762 }
d86053a4
MM		 763
764 /* mode 7 means get 3 bits for each coding mode */
765 if (scheme == 7)
766 coding_mode = get_bits(gb, 3);
e8e47435
SG		 767 else if(scheme == 0)
768 coding_mode = custom_mode_alphabet
769 [get_vlc2(gb, s->mode_code_vlc.table, 3, 3)];
d86053a4 770 else
e8e47435 771 coding_mode = ModeAlphabet[scheme-1]
0ad72bdd 772 [get_vlc2(gb, s->mode_code_vlc.table, 3, 3)];
d86053a4 773
96a7e73b 774 s->macroblock_coding[current_macroblock] = coding_mode;
d86053a4 775 for (k = 0; k < 6; k++) {
115329f1 776 current_fragment =
d86053a4 777 s->macroblock_fragments[current_macroblock * 6 + k];
892fc83e
MM		 778 if (current_fragment == -1)
779 continue;
780 if (current_fragment >= s->fragment_count) {
9b879566 781 av_log(s->avctx, AV_LOG_ERROR, " vp3:unpack_modes(): bad fragment number (%d >= %d)\n",
892fc83e
MM		 782 current_fragment, s->fragment_count);
783 return 1;
784 }
115329f1 785 if (s->all_fragments[current_fragment].coding_method !=
d86053a4
MM		 786 MODE_COPY)
787 s->all_fragments[current_fragment].coding_method =
788 coding_mode;
789 }
d86053a4
MM		 790 }
791 }
792 }
892fc83e
MM		 793
794 return 0;
44ae98dd
MM		 795}
796
797/*
d86053a4
MM		 798 * This function unpacks all the motion vectors for the individual
799 * macroblocks from the bitstream.
800 */
892fc83e 801static int unpack_vectors(Vp3DecodeContext *s, GetBitContext *gb)
d86053a4 802{
feaf1a73 803 int i, j, k, l;
d86053a4
MM		 804 int coding_mode;
805 int motion_x[6];
806 int motion_y[6];
807 int last_motion_x = 0;
808 int last_motion_y = 0;
809 int prior_last_motion_x = 0;
810 int prior_last_motion_y = 0;
811 int current_macroblock;
812 int current_fragment;
813
6599e2a7 814 if (s->keyframe)
6298f49f 815 return 0;
10f38380 816
d86053a4
MM		 817 memset(motion_x, 0, 6 * sizeof(int));
818 memset(motion_y, 0, 6 * sizeof(int));
819
820 /* coding mode 0 is the VLC scheme; 1 is the fixed code scheme */
5fc32c27 821 coding_mode = get_bits1(gb);
d86053a4
MM		 822
823 /* iterate through all of the macroblocks that contain 1 or more
824 * coded fragments */
825 for (i = 0; i < s->u_superblock_start; i++) {
826
827 for (j = 0; j < 4; j++) {
828 current_macroblock = s->superblock_macroblocks[i * 4 + j];
829 if ((current_macroblock == -1) ||
96a7e73b 830 (s->macroblock_coding[current_macroblock] == MODE_COPY))
d86053a4 831 continue;
892fc83e 832 if (current_macroblock >= s->macroblock_count) {
9b879566 833 av_log(s->avctx, AV_LOG_ERROR, " vp3:unpack_vectors(): bad macroblock number (%d >= %d)\n",
892fc83e
MM		 834 current_macroblock, s->macroblock_count);
835 return 1;
836 }
d86053a4
MM		 837
838 current_fragment = s->macroblock_fragments[current_macroblock * 6];
892fc83e 839 if (current_fragment >= s->fragment_count) {
9b879566 840 av_log(s->avctx, AV_LOG_ERROR, " vp3:unpack_vectors(): bad fragment number (%d >= %d\n",
892fc83e
MM		 841 current_fragment, s->fragment_count);
842 return 1;
843 }
96a7e73b 844 switch (s->macroblock_coding[current_macroblock]) {
d86053a4
MM		 845
846 case MODE_INTER_PLUS_MV:
847 case MODE_GOLDEN_MV:
848 /* all 6 fragments use the same motion vector */
849 if (coding_mode == 0) {
0ad72bdd
MM		 850 motion_x[0] = motion_vector_table[get_vlc2(gb, s->motion_vector_vlc.table, 6, 2)];
851 motion_y[0] = motion_vector_table[get_vlc2(gb, s->motion_vector_vlc.table, 6, 2)];
d86053a4 852 } else {
7f9926a4
MM		 853 motion_x[0] = fixed_motion_vector_table[get_bits(gb, 6)];
854 motion_y[0] = fixed_motion_vector_table[get_bits(gb, 6)];
d86053a4 855 }
7f9926a4 856
d86053a4
MM		 857 for (k = 1; k < 6; k++) {
858 motion_x[k] = motion_x[0];
859 motion_y[k] = motion_y[0];
860 }
861
862 /* vector maintenance, only on MODE_INTER_PLUS_MV */
642d7e84 863 if (s->macroblock_coding[current_macroblock] ==
d86053a4
MM		 864 MODE_INTER_PLUS_MV) {
865 prior_last_motion_x = last_motion_x;
866 prior_last_motion_y = last_motion_y;
867 last_motion_x = motion_x[0];
868 last_motion_y = motion_y[0];
869 }
870 break;
871
872 case MODE_INTER_FOURMV:
e32e2d56
AJ		 873 /* vector maintenance */
874 prior_last_motion_x = last_motion_x;
875 prior_last_motion_y = last_motion_y;
876
d86053a4
MM		 877 /* fetch 4 vectors from the bitstream, one for each
878 * Y fragment, then average for the C fragment vectors */
879 motion_x[4] = motion_y[4] = 0;
880 for (k = 0; k < 4; k++) {
feaf1a73
AJ		 881 for (l = 0; l < s->coded_fragment_list_index; l++)
882 if (s->coded_fragment_list[l] == s->macroblock_fragments[6*current_macroblock + k])
883 break;
884 if (l < s->coded_fragment_list_index) {
4834eb19
AJ		 885 if (coding_mode == 0) {
886 motion_x[k] = motion_vector_table[get_vlc2(gb, s->motion_vector_vlc.table, 6, 2)];
887 motion_y[k] = motion_vector_table[get_vlc2(gb, s->motion_vector_vlc.table, 6, 2)];
888 } else {
889 motion_x[k] = fixed_motion_vector_table[get_bits(gb, 6)];
890 motion_y[k] = fixed_motion_vector_table[get_bits(gb, 6)];
891 }
892 last_motion_x = motion_x[k];
893 last_motion_y = motion_y[k];
feaf1a73
AJ		 894 } else {
895 motion_x[k] = 0;
896 motion_y[k] = 0;
897 }
d86053a4
MM		 898 motion_x[4] += motion_x[k];
899 motion_y[4] += motion_y[k];
900 }
901
d2744e19
MN		 902 motion_x[5]=
903 motion_x[4]= RSHIFT(motion_x[4], 2);
904 motion_y[5]=
905 motion_y[4]= RSHIFT(motion_y[4], 2);
d86053a4
MM		 906 break;
907
908 case MODE_INTER_LAST_MV:
909 /* all 6 fragments use the last motion vector */
910 motion_x[0] = last_motion_x;
911 motion_y[0] = last_motion_y;
912 for (k = 1; k < 6; k++) {
913 motion_x[k] = motion_x[0];
914 motion_y[k] = motion_y[0];
915 }
916
917 /* no vector maintenance (last vector remains the
918 * last vector) */
919 break;
920
921 case MODE_INTER_PRIOR_LAST:
922 /* all 6 fragments use the motion vector prior to the
923 * last motion vector */
924 motion_x[0] = prior_last_motion_x;
925 motion_y[0] = prior_last_motion_y;
926 for (k = 1; k < 6; k++) {
927 motion_x[k] = motion_x[0];
928 motion_y[k] = motion_y[0];
929 }
930
931 /* vector maintenance */
932 prior_last_motion_x = last_motion_x;
933 prior_last_motion_y = last_motion_y;
934 last_motion_x = motion_x[0];
935 last_motion_y = motion_y[0];
936 break;
44ae98dd
MM		 937
938 default:
939 /* covers intra, inter without MV, golden without MV */
940 memset(motion_x, 0, 6 * sizeof(int));
941 memset(motion_y, 0, 6 * sizeof(int));
942
943 /* no vector maintenance */
944 break;
d86053a4
MM		 945 }
946
947 /* assign the motion vectors to the correct fragments */
d86053a4 948 for (k = 0; k < 6; k++) {
115329f1 949 current_fragment =
d86053a4 950 s->macroblock_fragments[current_macroblock * 6 + k];
892fc83e
MM		 951 if (current_fragment == -1)
952 continue;
953 if (current_fragment >= s->fragment_count) {
9b879566 954 av_log(s->avctx, AV_LOG_ERROR, " vp3:unpack_vectors(): bad fragment number (%d >= %d)\n",
892fc83e
MM		 955 current_fragment, s->fragment_count);
956 return 1;
957 }
d86053a4 958 s->all_fragments[current_fragment].motion_x = motion_x[k];
44ae98dd 959 s->all_fragments[current_fragment].motion_y = motion_y[k];
d86053a4
MM		 960 }
961 }
962 }
892fc83e
MM		 963
964 return 0;
d86053a4
MM		 965}
966
115329f1 967/*
d86053a4
MM		 968 * This function is called by unpack_dct_coeffs() to extract the VLCs from
969 * the bitstream. The VLCs encode tokens which are used to unpack DCT
970 * data. This function unpacks all the VLCs for either the Y plane or both
971 * C planes, and is called for DC coefficients or different AC coefficient
972 * levels (since different coefficient types require different VLC tables.
973 *
974 * This function returns a residual eob run. E.g, if a particular token gave
975 * instructions to EOB the next 5 fragments and there were only 2 fragments
976 * left in the current fragment range, 3 would be returned so that it could
977 * be passed into the next call to this same function.
978 */
979static int unpack_vlcs(Vp3DecodeContext *s, GetBitContext *gb,
980 VLC *table, int coeff_index,
981 int first_fragment, int last_fragment,
982 int eob_run)
983{
984 int i;
985 int token;
d3076955
MM		 986 int zero_run = 0;
987 DCTELEM coeff = 0;
d86053a4 988 Vp3Fragment *fragment;
36af0c95 989 uint8_t *perm= s->scantable.permutated;
d3076955 990 int bits_to_get;
d86053a4 991
22493ab9 992 if ((first_fragment >= s->fragment_count) ||
74c0ac12
MM		 993 (last_fragment >= s->fragment_count)) {
994
9b879566 995 av_log(s->avctx, AV_LOG_ERROR, " vp3:unpack_vlcs(): bad fragment number (%d -> %d ?)\n",
74c0ac12 996 first_fragment, last_fragment);
22493ab9 997 return 0;
74c0ac12
MM		 998 }
999
04331882 1000 for (i = first_fragment; i <= last_fragment; i++) {
36e16253 1001 int fragment_num = s->coded_fragment_list[i];
d86053a4 1002
36e16253 1003 if (s->coeff_counts[fragment_num] > coeff_index)
d86053a4 1004 continue;
36e16253 1005 fragment = &s->all_fragments[fragment_num];
d86053a4
MM		 1006
1007 if (!eob_run) {
1008 /* decode a VLC into a token */
1009 token = get_vlc2(gb, table->table, 5, 3);
d86053a4 1010 /* use the token to get a zero run, a coefficient, and an eob run */
d3076955
MM		 1011 if (token <= 6) {
1012 eob_run = eob_run_base[token];
1013 if (eob_run_get_bits[token])
1014 eob_run += get_bits(gb, eob_run_get_bits[token]);
1015 coeff = zero_run = 0;
1016 } else {
1017 bits_to_get = coeff_get_bits[token];
1018 if (!bits_to_get)
1019 coeff = coeff_tables[token][0];
1020 else
1021 coeff = coeff_tables[token][get_bits(gb, bits_to_get)];
1022
1023 zero_run = zero_run_base[token];
1024 if (zero_run_get_bits[token])
1025 zero_run += get_bits(gb, zero_run_get_bits[token]);
1026 }
d86053a4
MM		 1027 }
1028
1029 if (!eob_run) {
36e16253
RD		 1030 s->coeff_counts[fragment_num] += zero_run;
1031 if (s->coeff_counts[fragment_num] < 64){
7beddb12 1032 fragment->next_coeff->coeff= coeff;
36e16253 1033 fragment->next_coeff->index= perm[s->coeff_counts[fragment_num]++]; //FIXME perm here already?
7beddb12
MN		 1034 fragment->next_coeff->next= s->next_coeff;
1035 s->next_coeff->next=NULL;
1036 fragment->next_coeff= s->next_coeff++;
1037 }
d86053a4 1038 } else {
36e16253 1039 s->coeff_counts[fragment_num] |= 128;
d86053a4
MM		 1040 eob_run--;
1041 }
1042 }
1043
1044 return eob_run;
1045}
1046
1047/*
1048 * This function unpacks all of the DCT coefficient data from the
1049 * bitstream.
1050 */
892fc83e 1051static int unpack_dct_coeffs(Vp3DecodeContext *s, GetBitContext *gb)
d86053a4
MM		 1052{
1053 int i;
1054 int dc_y_table;
1055 int dc_c_table;
1056 int ac_y_table;
1057 int ac_c_table;
1058 int residual_eob_run = 0;
1059
f4433de9 1060 /* fetch the DC table indexes */
d86053a4
MM		 1061 dc_y_table = get_bits(gb, 4);
1062 dc_c_table = get_bits(gb, 4);
1063
1064 /* unpack the Y plane DC coefficients */
115329f1 1065 residual_eob_run = unpack_vlcs(s, gb, &s->dc_vlc[dc_y_table], 0,
04331882 1066 s->first_coded_y_fragment, s->last_coded_y_fragment, residual_eob_run);
d86053a4
MM		 1067
1068 /* unpack the C plane DC coefficients */
d86053a4 1069 residual_eob_run = unpack_vlcs(s, gb, &s->dc_vlc[dc_c_table], 0,
04331882 1070 s->first_coded_c_fragment, s->last_coded_c_fragment, residual_eob_run);
d86053a4 1071
f4433de9 1072 /* fetch the AC table indexes */
d86053a4
MM		 1073 ac_y_table = get_bits(gb, 4);
1074 ac_c_table = get_bits(gb, 4);
1075
a466e345 1076 /* unpack the group 1 AC coefficients (coeffs 1-5) */
d86053a4 1077 for (i = 1; i <= 5; i++) {
115329f1 1078 residual_eob_run = unpack_vlcs(s, gb, &s->ac_vlc_1[ac_y_table], i,
04331882 1079 s->first_coded_y_fragment, s->last_coded_y_fragment, residual_eob_run);
d86053a4 1080
115329f1 1081 residual_eob_run = unpack_vlcs(s, gb, &s->ac_vlc_1[ac_c_table], i,
04331882 1082 s->first_coded_c_fragment, s->last_coded_c_fragment, residual_eob_run);
d86053a4
MM		 1083 }
1084
a466e345 1085 /* unpack the group 2 AC coefficients (coeffs 6-14) */
d86053a4 1086 for (i = 6; i <= 14; i++) {
115329f1 1087 residual_eob_run = unpack_vlcs(s, gb, &s->ac_vlc_2[ac_y_table], i,
04331882 1088 s->first_coded_y_fragment, s->last_coded_y_fragment, residual_eob_run);
d86053a4 1089
115329f1 1090 residual_eob_run = unpack_vlcs(s, gb, &s->ac_vlc_2[ac_c_table], i,
04331882 1091 s->first_coded_c_fragment, s->last_coded_c_fragment, residual_eob_run);
d86053a4
MM		 1092 }
1093
a466e345 1094 /* unpack the group 3 AC coefficients (coeffs 15-27) */
d86053a4 1095 for (i = 15; i <= 27; i++) {
115329f1 1096 residual_eob_run = unpack_vlcs(s, gb, &s->ac_vlc_3[ac_y_table], i,
04331882 1097 s->first_coded_y_fragment, s->last_coded_y_fragment, residual_eob_run);
d86053a4 1098
115329f1 1099 residual_eob_run = unpack_vlcs(s, gb, &s->ac_vlc_3[ac_c_table], i,
04331882 1100 s->first_coded_c_fragment, s->last_coded_c_fragment, residual_eob_run);
d86053a4
MM		 1101 }
1102
a466e345 1103 /* unpack the group 4 AC coefficients (coeffs 28-63) */
d86053a4 1104 for (i = 28; i <= 63; i++) {
115329f1 1105 residual_eob_run = unpack_vlcs(s, gb, &s->ac_vlc_4[ac_y_table], i,
04331882 1106 s->first_coded_y_fragment, s->last_coded_y_fragment, residual_eob_run);
d86053a4 1107
115329f1 1108 residual_eob_run = unpack_vlcs(s, gb, &s->ac_vlc_4[ac_c_table], i,
04331882 1109 s->first_coded_c_fragment, s->last_coded_c_fragment, residual_eob_run);
d86053a4 1110 }
892fc83e
MM		 1111
1112 return 0;
d86053a4
MM		 1113}
1114
1115/*
1116 * This function reverses the DC prediction for each coded fragment in
115329f1 1117 * the frame. Much of this function is adapted directly from the original
d86053a4
MM		 1118 * VP3 source code.
1119 */
1120#define COMPATIBLE_FRAME(x) \
1121 (compatible_frame[s->all_fragments[x].coding_method] == current_frame_type)
1122#define FRAME_CODED(x) (s->all_fragments[x].coding_method != MODE_COPY)
7beddb12 1123#define DC_COEFF(u) (s->coeffs[u].index ? 0 : s->coeffs[u].coeff) //FIXME do somethin to simplify this
d86053a4
MM		 1124
1125static void reverse_dc_prediction(Vp3DecodeContext *s,
1126 int first_fragment,
1127 int fragment_width,
115329f1 1128 int fragment_height)
d86053a4
MM		 1129{
1130
1131#define PUL 8
1132#define PU 4
1133#define PUR 2
1134#define PL 1
1135
1136 int x, y;
1137 int i = first_fragment;
1138
59ef342b 1139 int predicted_dc;
d86053a4 1140
d86053a4
MM		 1141 /* DC values for the left, up-left, up, and up-right fragments */
1142 int vl, vul, vu, vur;
1143
f4433de9 1144 /* indexes for the left, up-left, up, and up-right fragments */
d86053a4
MM		 1145 int l, ul, u, ur;
1146
115329f1 1147 /*
d86053a4
MM		 1148 * The 6 fields mean:
1149 * 0: up-left multiplier
1150 * 1: up multiplier
1151 * 2: up-right multiplier
1152 * 3: left multiplier
d86053a4 1153 */
006ff1ca
MN		 1154 int predictor_transform[16][4] = {
1155 { 0, 0, 0, 0},
1156 { 0, 0, 0,128}, // PL
1157 { 0, 0,128, 0}, // PUR
1158 { 0, 0, 53, 75}, // PUR|PL
1159 { 0,128, 0, 0}, // PU
1160 { 0, 64, 0, 64}, // PU|PL
1161 { 0,128, 0, 0}, // PU|PUR
1162 { 0, 0, 53, 75}, // PU|PUR|PL
1163 {128, 0, 0, 0}, // PUL
1164 { 0, 0, 0,128}, // PUL|PL
1165 { 64, 0, 64, 0}, // PUL|PUR
1166 { 0, 0, 53, 75}, // PUL|PUR|PL
1167 { 0,128, 0, 0}, // PUL|PU
1168 {-104,116, 0,116}, // PUL|PU|PL
1169 { 24, 80, 24, 0}, // PUL|PU|PUR
1170 {-104,116, 0,116} // PUL|PU|PUR|PL
d86053a4
MM		 1171 };
1172
1173 /* This table shows which types of blocks can use other blocks for
1174 * prediction. For example, INTRA is the only mode in this table to
1175 * have a frame number of 0. That means INTRA blocks can only predict
115329f1 1176 * from other INTRA blocks. There are 2 golden frame coding types;
d86053a4
MM		 1177 * blocks encoding in these modes can only predict from other blocks
1178 * that were encoded with these 1 of these 2 modes. */
1179 unsigned char compatible_frame[8] = {
1180 1, /* MODE_INTER_NO_MV */
1181 0, /* MODE_INTRA */
1182 1, /* MODE_INTER_PLUS_MV */
1183 1, /* MODE_INTER_LAST_MV */
1184 1, /* MODE_INTER_PRIOR_MV */
1185 2, /* MODE_USING_GOLDEN */
1186 2, /* MODE_GOLDEN_MV */
1187 1 /* MODE_INTER_FOUR_MV */
1188 };
1189 int current_frame_type;
1190
1191 /* there is a last DC predictor for each of the 3 frame types */
1192 short last_dc[3];
1193
1194 int transform = 0;
1195
d86053a4
MM		 1196 vul = vu = vur = vl = 0;
1197 last_dc[0] = last_dc[1] = last_dc[2] = 0;
1198
1199 /* for each fragment row... */
1200 for (y = 0; y < fragment_height; y++) {
1201
1202 /* for each fragment in a row... */
1203 for (x = 0; x < fragment_width; x++, i++) {
1204
1205 /* reverse prediction if this block was coded */
1206 if (s->all_fragments[i].coding_method != MODE_COPY) {
1207
115329f1 1208 current_frame_type =
d86053a4 1209 compatible_frame[s->all_fragments[i].coding_method];
d86053a4 1210
f72f8a77
MN		 1211 transform= 0;
1212 if(x){
1213 l= i-1;
7beddb12 1214 vl = DC_COEFF(l);
006ff1ca
MN		 1215 if(FRAME_CODED(l) && COMPATIBLE_FRAME(l))
1216 transform |= PL;
f72f8a77
MN		 1217 }
1218 if(y){
1219 u= i-fragment_width;
7beddb12 1220 vu = DC_COEFF(u);
006ff1ca
MN		 1221 if(FRAME_CODED(u) && COMPATIBLE_FRAME(u))
1222 transform |= PU;
f72f8a77
MN		 1223 if(x){
1224 ul= i-fragment_width-1;
1225 vul = DC_COEFF(ul);
006ff1ca
MN		 1226 if(FRAME_CODED(ul) && COMPATIBLE_FRAME(ul))
1227 transform |= PUL;
f72f8a77
MN		 1228 }
1229 if(x + 1 < fragment_width){
1230 ur= i-fragment_width+1;
1231 vur = DC_COEFF(ur);
006ff1ca
MN		 1232 if(FRAME_CODED(ur) && COMPATIBLE_FRAME(ur))
1233 transform |= PUR;
f72f8a77 1234 }
d86053a4
MM		 1235 }
1236
d86053a4
MM		 1237 if (transform == 0) {
1238
1239 /* if there were no fragments to predict from, use last
1240 * DC saved */
7beddb12 1241 predicted_dc = last_dc[current_frame_type];
d86053a4
MM		 1242 } else {
1243
1244 /* apply the appropriate predictor transform */
1245 predicted_dc =
1246 (predictor_transform[transform][0] * vul) +
1247 (predictor_transform[transform][1] * vu) +
1248 (predictor_transform[transform][2] * vur) +
1249 (predictor_transform[transform][3] * vl);
1250
684d9e36 1251 predicted_dc /= 128;
d86053a4
MM		 1252
1253 /* check for outranging on the [ul u l] and
1254 * [ul u ur l] predictors */
1255 if ((transform == 13) || (transform == 15)) {
c26abfa5 1256 if (FFABS(predicted_dc - vu) > 128)
d86053a4 1257 predicted_dc = vu;
c26abfa5 1258 else if (FFABS(predicted_dc - vl) > 128)
d86053a4 1259 predicted_dc = vl;
c26abfa5 1260 else if (FFABS(predicted_dc - vul) > 128)
d86053a4
MM		 1261 predicted_dc = vul;
1262 }
d86053a4
MM		 1263 }
1264
7beddb12
MN		 1265 /* at long last, apply the predictor */
1266 if(s->coeffs[i].index){
1267 *s->next_coeff= s->coeffs[i];
1268 s->coeffs[i].index=0;
1269 s->coeffs[i].coeff=0;
1270 s->coeffs[i].next= s->next_coeff++;
1271 }
1272 s->coeffs[i].coeff += predicted_dc;
d86053a4 1273 /* save the DC */
7beddb12 1274 last_dc[current_frame_type] = DC_COEFF(i);
36e16253
RD		 1275 if(DC_COEFF(i) && !(s->coeff_counts[i]&127)){
1276 s->coeff_counts[i]= 129;
7beddb12
MN		 1277// s->all_fragments[i].next_coeff= s->next_coeff;
1278 s->coeffs[i].next= s->next_coeff;
1279 (s->next_coeff++)->next=NULL;
1280 }
d86053a4
MM		 1281 }
1282 }
1283 }
1284}
1285
f44b08a5
MM		 1286
1287static void horizontal_filter(unsigned char *first_pixel, int stride,
1288 int *bounding_values);
1289static void vertical_filter(unsigned char *first_pixel, int stride,
1290 int *bounding_values);
1291
d86053a4 1292/*
dc4b78d9
MM		 1293 * Perform the final rendering for a particular slice of data.
1294 * The slice number ranges from 0..(macroblock_height - 1).
1295 */
1296static void render_slice(Vp3DecodeContext *s, int slice)
1297{
1abbf64e 1298 int x;
dc4b78d9 1299 int16_t *dequantizer;
68b51e58 1300 DECLARE_ALIGNED_16(DCTELEM, block[64]);
dc4b78d9 1301 int motion_x = 0xdeadbeef, motion_y = 0xdeadbeef;
dc4b78d9
MM		 1302 int motion_halfpel_index;
1303 uint8_t *motion_source;
1304 int plane;
dc4b78d9
MM		 1305 int current_macroblock_entry = slice * s->macroblock_width * 6;
1306
1307 if (slice >= s->macroblock_height)
1308 return;
1309
1310 for (plane = 0; plane < 3; plane++) {
1abbf64e
MN		 1311 uint8_t *output_plane = s->current_frame.data [plane];
1312 uint8_t * last_plane = s-> last_frame.data [plane];
1313 uint8_t *golden_plane = s-> golden_frame.data [plane];
1314 int stride = s->current_frame.linesize[plane];
1315 int plane_width = s->width >> !!plane;
1316 int plane_height = s->height >> !!plane;
1317 int y = slice * FRAGMENT_PIXELS << !plane ;
1318 int slice_height = y + (FRAGMENT_PIXELS << !plane);
1319 int i = s->macroblock_fragments[current_macroblock_entry + plane + 3*!!plane];
1320
1321 if (!s->flipped_image) stride = -stride;
dc4b78d9 1322
115329f1 1323
c26abfa5 1324 if(FFABS(stride) > 2048)
dc4b78d9
MM		 1325 return; //various tables are fixed size
1326
1327 /* for each fragment row in the slice (both of them)... */
1328 for (; y < slice_height; y += 8) {
1329
1330 /* for each fragment in a row... */
1331 for (x = 0; x < plane_width; x += 8, i++) {
1332
1333 if ((i < 0) || (i >= s->fragment_count)) {
1334 av_log(s->avctx, AV_LOG_ERROR, " vp3:render_slice(): bad fragment number (%d)\n", i);
1335 return;
1336 }
1337
1338 /* transform if this block was coded */
1339 if ((s->all_fragments[i].coding_method != MODE_COPY) &&
1340 !((s->avctx->flags & CODEC_FLAG_GRAY) && plane)) {
1341
1342 if ((s->all_fragments[i].coding_method == MODE_USING_GOLDEN) ||
1343 (s->all_fragments[i].coding_method == MODE_GOLDEN_MV))
1344 motion_source= golden_plane;
115329f1 1345 else
dc4b78d9
MM		 1346 motion_source= last_plane;
1347
1348 motion_source += s->all_fragments[i].first_pixel;
1349 motion_halfpel_index = 0;
1350
1351 /* sort out the motion vector if this fragment is coded
1352 * using a motion vector method */
1353 if ((s->all_fragments[i].coding_method > MODE_INTRA) &&
1354 (s->all_fragments[i].coding_method != MODE_USING_GOLDEN)) {
1355 int src_x, src_y;
1356 motion_x = s->all_fragments[i].motion_x;
1357 motion_y = s->all_fragments[i].motion_y;
1358 if(plane){
1359 motion_x= (motion_x>>1) | (motion_x&1);
1360 motion_y= (motion_y>>1) | (motion_y&1);
1361 }
1362
1363 src_x= (motion_x>>1) + x;
1364 src_y= (motion_y>>1) + y;
1365 if ((motion_x == 127) || (motion_y == 127))
1366 av_log(s->avctx, AV_LOG_ERROR, " help! got invalid motion vector! (%X, %X)\n", motion_x, motion_y);
1367
1368 motion_halfpel_index = motion_x & 0x01;
1369 motion_source += (motion_x >> 1);
1370
1371 motion_halfpel_index |= (motion_y & 0x01) << 1;
1372 motion_source += ((motion_y >> 1) * stride);
1373
1374 if(src_x<0 || src_y<0 || src_x + 9 >= plane_width || src_y + 9 >= plane_height){
1375 uint8_t *temp= s->edge_emu_buffer;
1376 if(stride<0) temp -= 9*stride;
1377 else temp += 9*stride;
1378
1379 ff_emulated_edge_mc(temp, motion_source, stride, 9, 9, src_x, src_y, plane_width, plane_height);
1380 motion_source= temp;
1381 }
1382 }
115329f1 1383
dc4b78d9
MM		 1384
1385 /* first, take care of copying a block from either the
1386 * previous or the golden frame */
1387 if (s->all_fragments[i].coding_method != MODE_INTRA) {
115329f1
DB		 1388 /* Note, it is possible to implement all MC cases with
1389 put_no_rnd_pixels_l2 which would look more like the
1390 VP3 source but this would be slower as
dc4b78d9
MM		 1391 put_no_rnd_pixels_tab is better optimzed */
1392 if(motion_halfpel_index != 3){
1393 s->dsp.put_no_rnd_pixels_tab[1][motion_halfpel_index](
1394 output_plane + s->all_fragments[i].first_pixel,
1395 motion_source, stride, 8);
1396 }else{
1397 int d= (motion_x ^ motion_y)>>31; // d is 0 if motion_x and _y have the same sign, else -1
1398 s->dsp.put_no_rnd_pixels_l2[1](
1399 output_plane + s->all_fragments[i].first_pixel,
115329f1
DB		 1400 motion_source - d,
1401 motion_source + stride + 1 + d,
dc4b78d9
MM		 1402 stride, 8);
1403 }
187c9be7 1404 dequantizer = s->qmat[1][plane];
dc4b78d9 1405 }else{
187c9be7 1406 dequantizer = s->qmat[0][plane];
dc4b78d9
MM		 1407 }
1408
1409 /* dequantize the DCT coefficients */
dc4b78d9
MM		 1410 if(s->avctx->idct_algo==FF_IDCT_VP3){
1411 Coeff *coeff= s->coeffs + i;
1412 memset(block, 0, sizeof(block));
1413 while(coeff->next){
1414 block[coeff->index]= coeff->coeff * dequantizer[coeff->index];
1415 coeff= coeff->next;
1416 }
1417 }else{
1418 Coeff *coeff= s->coeffs + i;
1419 memset(block, 0, sizeof(block));
1420 while(coeff->next){
1421 block[coeff->index]= (coeff->coeff * dequantizer[coeff->index] + 2)>>2;
1422 coeff= coeff->next;
1423 }
1424 }
1425
1426 /* invert DCT and place (or add) in final output */
115329f1 1427
dc4b78d9
MM		 1428 if (s->all_fragments[i].coding_method == MODE_INTRA) {
1429 if(s->avctx->idct_algo!=FF_IDCT_VP3)
1430 block[0] += 128<<3;
1431 s->dsp.idct_put(
1432 output_plane + s->all_fragments[i].first_pixel,
1433 stride,
1434 block);
1435 } else {
1436 s->dsp.idct_add(
1437 output_plane + s->all_fragments[i].first_pixel,
1438 stride,
1439 block);
1440 }
dc4b78d9
MM		 1441 } else {
1442
1443 /* copy directly from the previous frame */
1444 s->dsp.put_pixels_tab[1][0](
1445 output_plane + s->all_fragments[i].first_pixel,
1446 last_plane + s->all_fragments[i].first_pixel,
1447 stride, 8);
1448
1449 }
72053728 1450#if 0
2935001c
MM		 1451 /* perform the left edge filter if:
1452 * - the fragment is not on the left column
1453 * - the fragment is coded in this frame
1454 * - the fragment is not coded in this frame but the left
1455 * fragment is coded in this frame (this is done instead
1456 * of a right edge filter when rendering the left fragment
1457 * since this fragment is not available yet) */
f44b08a5 1458 if ((x > 0) &&
2935001c
MM		 1459 ((s->all_fragments[i].coding_method != MODE_COPY) ||
1460 ((s->all_fragments[i].coding_method == MODE_COPY) &&
1461 (s->all_fragments[i - 1].coding_method != MODE_COPY)) )) {
f44b08a5 1462 horizontal_filter(
2935001c 1463 output_plane + s->all_fragments[i].first_pixel + 7*stride,
1af5f60f 1464 -stride, s->bounding_values_array + 127);
f44b08a5
MM		 1465 }
1466
2935001c
MM		 1467 /* perform the top edge filter if:
1468 * - the fragment is not on the top row
1469 * - the fragment is coded in this frame
1470 * - the fragment is not coded in this frame but the above
1471 * fragment is coded in this frame (this is done instead
1472 * of a bottom edge filter when rendering the above
1473 * fragment since this fragment is not available yet) */
f44b08a5 1474 if ((y > 0) &&
2935001c
MM		 1475 ((s->all_fragments[i].coding_method != MODE_COPY) ||
1476 ((s->all_fragments[i].coding_method == MODE_COPY) &&
1477 (s->all_fragments[i - fragment_width].coding_method != MODE_COPY)) )) {
f44b08a5 1478 vertical_filter(
2935001c 1479 output_plane + s->all_fragments[i].first_pixel - stride,
1af5f60f 1480 -stride, s->bounding_values_array + 127);
f44b08a5 1481 }
72053728 1482#endif
dc4b78d9
MM		 1483 }
1484 }
1485 }
1486
dc4b78d9
MM		 1487 /* this looks like a good place for slice dispatch... */
1488 /* algorithm:
dc4b78d9 1489 * if (slice == s->macroblock_height - 1)
f44b08a5
MM		 1490 * dispatch (both last slice & 2nd-to-last slice);
1491 * else if (slice > 0)
1492 * dispatch (slice - 1);
dc4b78d9
MM		 1493 */
1494
1495 emms_c();
1496}
1497
a54ea19a
MM		 1498static void horizontal_filter(unsigned char *first_pixel, int stride,
1499 int *bounding_values)
1500{
6f7aa589 1501 unsigned char *end;
a54ea19a
MM		 1502 int filter_value;
1503
1af5f60f 1504 for (end= first_pixel + 8*stride; first_pixel != end; first_pixel += stride) {
115329f1 1505 filter_value =
6f7aa589
MN		 1506 (first_pixel[-2] - first_pixel[ 1])
1507 +3*(first_pixel[ 0] - first_pixel[-1]);
a54ea19a 1508 filter_value = bounding_values[(filter_value + 4) >> 3];
f66e4f5f
RD		 1509 first_pixel[-1] = av_clip_uint8(first_pixel[-1] + filter_value);
1510 first_pixel[ 0] = av_clip_uint8(first_pixel[ 0] - filter_value);
a54ea19a
MM		 1511 }
1512}
1513
1514static void vertical_filter(unsigned char *first_pixel, int stride,
1515 int *bounding_values)
1516{
6f7aa589 1517 unsigned char *end;
a54ea19a 1518 int filter_value;
6f7aa589 1519 const int nstride= -stride;
a54ea19a 1520
6f7aa589 1521 for (end= first_pixel + 8; first_pixel < end; first_pixel++) {
115329f1 1522 filter_value =
6f7aa589
MN		 1523 (first_pixel[2 * nstride] - first_pixel[ stride])
1524 +3*(first_pixel[0 ] - first_pixel[nstride]);
a54ea19a 1525 filter_value = bounding_values[(filter_value + 4) >> 3];
f66e4f5f
RD		 1526 first_pixel[nstride] = av_clip_uint8(first_pixel[nstride] + filter_value);
1527 first_pixel[0] = av_clip_uint8(first_pixel[0] - filter_value);
a54ea19a
MM		 1528 }
1529}
1530
1531static void apply_loop_filter(Vp3DecodeContext *s)
1532{
1abbf64e
MN		 1533 int plane;
1534 int x, y;
f44b08a5 1535 int *bounding_values= s->bounding_values_array+127;
d5e18835 1536
f44b08a5 1537#if 0
d5e18835 1538 int bounding_values_array[256];
a54ea19a
MM		 1539 int filter_limit;
1540
1541 /* find the right loop limit value */
1542 for (x = 63; x >= 0; x--) {
1543 if (vp31_ac_scale_factor[x] >= s->quality_index)
1544 break;
1545 }
d5e18835 1546 filter_limit = vp31_filter_limit_values[s->quality_index];
a54ea19a
MM		 1547
1548 /* set up the bounding values */
d5e18835 1549 memset(bounding_values_array, 0, 256 * sizeof(int));
a54ea19a
MM		 1550 for (x = 0; x < filter_limit; x++) {
1551 bounding_values[-x - filter_limit] = -filter_limit + x;
1552 bounding_values[-x] = -x;
1553 bounding_values[x] = x;
1554 bounding_values[x + filter_limit] = filter_limit - x;
1555 }
f44b08a5 1556#endif
a54ea19a
MM		 1557
1558 for (plane = 0; plane < 3; plane++) {
1abbf64e
MN		 1559 int width = s->fragment_width >> !!plane;
1560 int height = s->fragment_height >> !!plane;
1561 int fragment = s->fragment_start [plane];
1562 int stride = s->current_frame.linesize[plane];
1563 uint8_t *plane_data = s->current_frame.data [plane];
1af5f60f 1564 if (!s->flipped_image) stride = -stride;
a54ea19a
MM		 1565
1566 for (y = 0; y < height; y++) {
d86053a4 1567
a54ea19a 1568 for (x = 0; x < width; x++) {
a54ea19a
MM		 1569 /* do not perform left edge filter for left columns frags */
1570 if ((x > 0) &&
1571 (s->all_fragments[fragment].coding_method != MODE_COPY)) {
1572 horizontal_filter(
1af5f60f 1573 plane_data + s->all_fragments[fragment].first_pixel,
a54ea19a
MM		 1574 stride, bounding_values);
1575 }
1576
1577 /* do not perform top edge filter for top row fragments */
1578 if ((y > 0) &&
1579 (s->all_fragments[fragment].coding_method != MODE_COPY)) {
1580 vertical_filter(
1af5f60f 1581 plane_data + s->all_fragments[fragment].first_pixel,
a54ea19a
MM		 1582 stride, bounding_values);
1583 }
1584
1585 /* do not perform right edge filter for right column
1586 * fragments or if right fragment neighbor is also coded
1587 * in this frame (it will be filtered in next iteration) */
1588 if ((x < width - 1) &&
1589 (s->all_fragments[fragment].coding_method != MODE_COPY) &&
1590 (s->all_fragments[fragment + 1].coding_method == MODE_COPY)) {
1591 horizontal_filter(
1af5f60f 1592 plane_data + s->all_fragments[fragment + 1].first_pixel,
a54ea19a
MM		 1593 stride, bounding_values);
1594 }
1595
1596 /* do not perform bottom edge filter for bottom row
1597 * fragments or if bottom fragment neighbor is also coded
1598 * in this frame (it will be filtered in the next row) */
1599 if ((y < height - 1) &&
1600 (s->all_fragments[fragment].coding_method != MODE_COPY) &&
1601 (s->all_fragments[fragment + width].coding_method == MODE_COPY)) {
1602 vertical_filter(
1af5f60f 1603 plane_data + s->all_fragments[fragment + width].first_pixel,
a54ea19a
MM		 1604 stride, bounding_values);
1605 }
1606
1607 fragment++;
1608 }
1609 }
1610 }
d86053a4
MM		 1611}
1612
115329f1 1613/*
d86053a4
MM		 1614 * This function computes the first pixel addresses for each fragment.
1615 * This function needs to be invoked after the first frame is allocated
1616 * so that it has access to the plane strides.
1617 */
115329f1 1618static void vp3_calculate_pixel_addresses(Vp3DecodeContext *s)
d86053a4 1619{
fc961819
DC		 1620#define Y_INITIAL(chroma_shift) s->flipped_image ? 1 : s->fragment_height >> chroma_shift
1621#define Y_FINISHED(chroma_shift) s->flipped_image ? y <= s->fragment_height >> chroma_shift : y > 0
d86053a4
MM		 1622
1623 int i, x, y;
fc961819 1624 const int y_inc = s->flipped_image ? 1 : -1;
d86053a4
MM		 1625
1626 /* figure out the first pixel addresses for each of the fragments */
1627 /* Y plane */
1628 i = 0;
fc961819 1629 for (y = Y_INITIAL(0); Y_FINISHED(0); y += y_inc) {
d86053a4 1630 for (x = 0; x < s->fragment_width; x++) {
115329f1 1631 s->all_fragments[i++].first_pixel =
d86053a4
MM		 1632 s->golden_frame.linesize[0] * y * FRAGMENT_PIXELS -
1633 s->golden_frame.linesize[0] +
1634 x * FRAGMENT_PIXELS;
d86053a4
MM		 1635 }
1636 }
1637
1638 /* U plane */
1abbf64e 1639 i = s->fragment_start[1];
fc961819 1640 for (y = Y_INITIAL(1); Y_FINISHED(1); y += y_inc) {
d86053a4 1641 for (x = 0; x < s->fragment_width / 2; x++) {
115329f1 1642 s->all_fragments[i++].first_pixel =
d86053a4
MM		 1643 s->golden_frame.linesize[1] * y * FRAGMENT_PIXELS -
1644 s->golden_frame.linesize[1] +
1645 x * FRAGMENT_PIXELS;
d86053a4
MM		 1646 }
1647 }
1648
1649 /* V plane */
1abbf64e 1650 i = s->fragment_start[2];
fc961819 1651 for (y = Y_INITIAL(1); Y_FINISHED(1); y += y_inc) {
9a7ad925 1652 for (x = 0; x < s->fragment_width / 2; x++) {
115329f1 1653 s->all_fragments[i++].first_pixel =
9a7ad925
AB		 1654 s->golden_frame.linesize[2] * y * FRAGMENT_PIXELS -
1655 s->golden_frame.linesize[2] +
1656 x * FRAGMENT_PIXELS;
9a7ad925
AB		 1657 }
1658 }
1659}
1660
d86053a4
MM		 1661/*
1662 * This is the ffmpeg/libavcodec API init function.
1663 */
98a6fff9 1664static av_cold int vp3_decode_init(AVCodecContext *avctx)
d86053a4
MM		 1665{
1666 Vp3DecodeContext *s = avctx->priv_data;
ae1dd8e1 1667 int i, inter, plane;
892fc83e
MM		 1668 int c_width;
1669 int c_height;
1670 int y_superblock_count;
1671 int c_superblock_count;
d86053a4 1672
3c3f113e 1673 if (avctx->codec_tag == MKTAG('V','P','3','0'))
bb270c08 1674 s->version = 0;
3c3f113e 1675 else
bb270c08 1676 s->version = 1;
3c3f113e 1677
d86053a4 1678 s->avctx = avctx;
642d7e84
MM		 1679 s->width = (avctx->width + 15) & 0xFFFFFFF0;
1680 s->height = (avctx->height + 15) & 0xFFFFFFF0;
d86053a4 1681 avctx->pix_fmt = PIX_FMT_YUV420P;
8b6103da
MN		 1682 if(avctx->idct_algo==FF_IDCT_AUTO)
1683 avctx->idct_algo=FF_IDCT_VP3;
d86053a4 1684 dsputil_init(&s->dsp, avctx);
115329f1 1685
36af0c95 1686 ff_init_scantable(s->dsp.idct_permutation, &s->scantable, ff_zigzag_direct);
d86053a4
MM		 1687
1688 /* initialize to an impossible value which will force a recalculation
1689 * in the first frame decode */
1690 s->quality_index = -1;
1691
892fc83e
MM		 1692 s->y_superblock_width = (s->width + 31) / 32;
1693 s->y_superblock_height = (s->height + 31) / 32;
1694 y_superblock_count = s->y_superblock_width * s->y_superblock_height;
1695
1696 /* work out the dimensions for the C planes */
1697 c_width = s->width / 2;
1698 c_height = s->height / 2;
1699 s->c_superblock_width = (c_width + 31) / 32;
1700 s->c_superblock_height = (c_height + 31) / 32;
1701 c_superblock_count = s->c_superblock_width * s->c_superblock_height;
1702
1703 s->superblock_count = y_superblock_count + (c_superblock_count * 2);
1704 s->u_superblock_start = y_superblock_count;
1705 s->v_superblock_start = s->u_superblock_start + c_superblock_count;
d86053a4
MM		 1706 s->superblock_coding = av_malloc(s->superblock_count);
1707
1708 s->macroblock_width = (s->width + 15) / 16;
1709 s->macroblock_height = (s->height + 15) / 16;
1710 s->macroblock_count = s->macroblock_width * s->macroblock_height;
1711
1712 s->fragment_width = s->width / FRAGMENT_PIXELS;
1713 s->fragment_height = s->height / FRAGMENT_PIXELS;
1714
1715 /* fragment count covers all 8x8 blocks for all 3 planes */
1716 s->fragment_count = s->fragment_width * s->fragment_height * 3 / 2;
1abbf64e
MN		 1717 s->fragment_start[1] = s->fragment_width * s->fragment_height;
1718 s->fragment_start[2] = s->fragment_width * s->fragment_height * 5 / 4;
d86053a4 1719
d86053a4 1720 s->all_fragments = av_malloc(s->fragment_count * sizeof(Vp3Fragment));
36e16253 1721 s->coeff_counts = av_malloc(s->fragment_count * sizeof(*s->coeff_counts));
7beddb12 1722 s->coeffs = av_malloc(s->fragment_count * sizeof(Coeff) * 65);
d86053a4 1723 s->coded_fragment_list = av_malloc(s->fragment_count * sizeof(int));
5e534865 1724 s->pixel_addresses_initialized = 0;
d86053a4 1725
f44ee2c3
AB		 1726 if (!s->theora_tables)
1727 {
2287c100 1728 for (i = 0; i < 64; i++) {
bb270c08 1729 s->coded_dc_scale_factor[i] = vp31_dc_scale_factor[i];
bb270c08 1730 s->coded_ac_scale_factor[i] = vp31_ac_scale_factor[i];
ae1dd8e1 1731 s->base_matrix[0][i] = vp31_intra_y_dequant[i];
ae1dd8e1 1732 s->base_matrix[1][i] = vp31_intra_c_dequant[i];
ae1dd8e1 1733 s->base_matrix[2][i] = vp31_inter_dequant[i];
bb270c08 1734 s->filter_limit_values[i] = vp31_filter_limit_values[i];
2287c100 1735 }
f44ee2c3 1736
ae1dd8e1
MN		 1737 for(inter=0; inter<2; inter++){
1738 for(plane=0; plane<3; plane++){
1739 s->qr_count[inter][plane]= 1;
1740 s->qr_size [inter][plane][0]= 63;
1741 s->qr_base [inter][plane][0]=
1742 s->qr_base [inter][plane][1]= 2*inter + (!!plane)*!inter;
1743 }
1744 }
1745
39922395
MM		 1746 /* init VLC tables */
1747 for (i = 0; i < 16; i++) {
1748
1749 /* DC histograms */
1750 init_vlc(&s->dc_vlc[i], 5, 32,
1751 &dc_bias[i][0][1], 4, 2,
1752 &dc_bias[i][0][0], 4, 2, 0);
1753
1754 /* group 1 AC histograms */
1755 init_vlc(&s->ac_vlc_1[i], 5, 32,
1756 &ac_bias_0[i][0][1], 4, 2,
1757 &ac_bias_0[i][0][0], 4, 2, 0);
1758
1759 /* group 2 AC histograms */
1760 init_vlc(&s->ac_vlc_2[i], 5, 32,
1761 &ac_bias_1[i][0][1], 4, 2,
1762 &ac_bias_1[i][0][0], 4, 2, 0);
1763
1764 /* group 3 AC histograms */
1765 init_vlc(&s->ac_vlc_3[i], 5, 32,
1766 &ac_bias_2[i][0][1], 4, 2,
1767 &ac_bias_2[i][0][0], 4, 2, 0);
1768
1769 /* group 4 AC histograms */
1770 init_vlc(&s->ac_vlc_4[i], 5, 32,
1771 &ac_bias_3[i][0][1], 4, 2,
1772 &ac_bias_3[i][0][0], 4, 2, 0);
1773 }
1774 } else {
1775 for (i = 0; i < 16; i++) {
1776
1777 /* DC histograms */
1778 init_vlc(&s->dc_vlc[i], 5, 32,
1779 &s->huffman_table[i][0][1], 4, 2,
1780 &s->huffman_table[i][0][0], 4, 2, 0);
1781
1782 /* group 1 AC histograms */
1783 init_vlc(&s->ac_vlc_1[i], 5, 32,
1784 &s->huffman_table[i+16][0][1], 4, 2,
1785 &s->huffman_table[i+16][0][0], 4, 2, 0);
1786
1787 /* group 2 AC histograms */
1788 init_vlc(&s->ac_vlc_2[i], 5, 32,
1789 &s->huffman_table[i+16*2][0][1], 4, 2,
1790 &s->huffman_table[i+16*2][0][0], 4, 2, 0);
1791
1792 /* group 3 AC histograms */
1793 init_vlc(&s->ac_vlc_3[i], 5, 32,
1794 &s->huffman_table[i+16*3][0][1], 4, 2,
1795 &s->huffman_table[i+16*3][0][0], 4, 2, 0);
1796
1797 /* group 4 AC histograms */
1798 init_vlc(&s->ac_vlc_4[i], 5, 32,
1799 &s->huffman_table[i+16*4][0][1], 4, 2,
1800 &s->huffman_table[i+16*4][0][0], 4, 2, 0);
1801 }
d86053a4
MM		 1802 }
1803
d8278bab
MM		 1804 init_vlc(&s->superblock_run_length_vlc, 6, 34,
1805 &superblock_run_length_vlc_table[0][1], 4, 2,
1806 &superblock_run_length_vlc_table[0][0], 4, 2, 0);
1807
dd36b667 1808 init_vlc(&s->fragment_run_length_vlc, 5, 30,
0ad72bdd
MM		 1809 &fragment_run_length_vlc_table[0][1], 4, 2,
1810 &fragment_run_length_vlc_table[0][0], 4, 2, 0);
1811
1812 init_vlc(&s->mode_code_vlc, 3, 8,
1813 &mode_code_vlc_table[0][1], 2, 1,
1814 &mode_code_vlc_table[0][0], 2, 1, 0);
1815
1816 init_vlc(&s->motion_vector_vlc, 6, 63,
1817 &motion_vector_vlc_table[0][1], 2, 1,
1818 &motion_vector_vlc_table[0][0], 2, 1, 0);
1819
d86053a4
MM		 1820 /* work out the block mapping tables */
1821 s->superblock_fragments = av_malloc(s->superblock_count * 16 * sizeof(int));
1822 s->superblock_macroblocks = av_malloc(s->superblock_count * 4 * sizeof(int));
1823 s->macroblock_fragments = av_malloc(s->macroblock_count * 6 * sizeof(int));
96a7e73b 1824 s->macroblock_coding = av_malloc(s->macroblock_count + 1);
d86053a4
MM		 1825 init_block_mapping(s);
1826
44ae98dd
MM		 1827 for (i = 0; i < 3; i++) {
1828 s->current_frame.data[i] = NULL;
1829 s->last_frame.data[i] = NULL;
1830 s->golden_frame.data[i] = NULL;
61873c4a
MM		 1831 }
1832
d86053a4
MM		 1833 return 0;
1834}
1835
1836/*
1837 * This is the ffmpeg/libavcodec API frame decode function.
1838 */
115329f1 1839static int vp3_decode_frame(AVCodecContext *avctx,
d86053a4 1840 void *data, int *data_size,
bed9dc16 1841 const uint8_t *buf, int buf_size)
d86053a4
MM		 1842{
1843 Vp3DecodeContext *s = avctx->priv_data;
1844 GetBitContext gb;
1845 static int counter = 0;
dc4b78d9 1846 int i;
d86053a4 1847
d86053a4 1848 init_get_bits(&gb, buf, buf_size * 8);
115329f1 1849
f44ee2c3
AB		 1850 if (s->theora && get_bits1(&gb))
1851 {
bb270c08
DB		 1852 av_log(avctx, AV_LOG_ERROR, "Header packet passed to frame decoder, skipping\n");
1853 return -1;
f44ee2c3 1854 }
3c3f113e
AB		 1855
1856 s->keyframe = !get_bits1(&gb);
1857 if (!s->theora)
bb270c08 1858 skip_bits(&gb, 1);
3c3f113e 1859 s->last_quality_index = s->quality_index;
efea8528
MN		 1860
1861 s->nqis=0;
1862 do{
1863 s->qis[s->nqis++]= get_bits(&gb, 6);
1864 } while(s->theora >= 0x030200 && s->nqis<3 && get_bits1(&gb));
1865
1866 s->quality_index= s->qis[0];
d86053a4 1867
f8830383 1868 if (s->avctx->debug & FF_DEBUG_PICT_INFO)
bb270c08
DB		 1869 av_log(s->avctx, AV_LOG_INFO, " VP3 %sframe #%d: Q index = %d\n",
1870 s->keyframe?"key":"", counter, s->quality_index);
d86053a4
MM		 1871 counter++;
1872
f44b08a5 1873 if (s->quality_index != s->last_quality_index) {
642d7e84 1874 init_dequantizer(s);
f44b08a5
MM		 1875 init_loop_filter(s);
1876 }
642d7e84 1877
068e82ba
DC		 1878 if (avctx->skip_frame >= AVDISCARD_NONKEY && !s->keyframe)
1879 return buf_size;
1880
d86053a4 1881 if (s->keyframe) {
bb270c08
DB		 1882 if (!s->theora)
1883 {
1884 skip_bits(&gb, 4); /* width code */
1885 skip_bits(&gb, 4); /* height code */
1886 if (s->version)
1887 {
1888 s->version = get_bits(&gb, 5);
1889 if (counter == 1)
1890 av_log(s->avctx, AV_LOG_DEBUG, "VP version: %d\n", s->version);
1891 }
1892 }
1893 if (s->version || s->theora)
1894 {
1895 if (get_bits1(&gb))
1896 av_log(s->avctx, AV_LOG_ERROR, "Warning, unsupported keyframe coding type?!\n");
1897 skip_bits(&gb, 2); /* reserved? */
1898 }
3c3f113e 1899
74c0ac12
MM		 1900 if (s->last_frame.data[0] == s->golden_frame.data[0]) {
1901 if (s->golden_frame.data[0])
1902 avctx->release_buffer(avctx, &s->golden_frame);
8e39d4a7 1903 s->last_frame= s->golden_frame; /* ensure that we catch any access to this released frame */
74c0ac12
MM		 1904 } else {
1905 if (s->golden_frame.data[0])
1906 avctx->release_buffer(avctx, &s->golden_frame);
1907 if (s->last_frame.data[0])
1908 avctx->release_buffer(avctx, &s->last_frame);
1909 }
d86053a4 1910
8e39d4a7 1911 s->golden_frame.reference = 3;
d86053a4 1912 if(avctx->get_buffer(avctx, &s->golden_frame) < 0) {
9b879566 1913 av_log(s->avctx, AV_LOG_ERROR, "vp3: get_buffer() failed\n");
d86053a4
MM		 1914 return -1;
1915 }
1916
d86053a4 1917 /* golden frame is also the current frame */
4501e678 1918 s->current_frame= s->golden_frame;
d86053a4
MM		 1919
1920 /* time to figure out pixel addresses? */
5e534865 1921 if (!s->pixel_addresses_initialized)
bb270c08 1922 {
ba31df31 1923 vp3_calculate_pixel_addresses(s);
5e534865 1924 s->pixel_addresses_initialized = 1;
bb270c08 1925 }
d86053a4 1926 } else {
d86053a4 1927 /* allocate a new current frame */
8e39d4a7 1928 s->current_frame.reference = 3;
5e534865 1929 if (!s->pixel_addresses_initialized) {
bc185f72
RD		 1930 av_log(s->avctx, AV_LOG_ERROR, "vp3: first frame not a keyframe\n");
1931 return -1;
1932 }
d86053a4 1933 if(avctx->get_buffer(avctx, &s->current_frame) < 0) {
9b879566 1934 av_log(s->avctx, AV_LOG_ERROR, "vp3: get_buffer() failed\n");
d86053a4
MM		 1935 return -1;
1936 }
d86053a4
MM		 1937 }
1938
b928ec64
MN		 1939 s->current_frame.qscale_table= s->qscale_table; //FIXME allocate individual tables per AVFrame
1940 s->current_frame.qstride= 0;
1941
d86053a4
MM		 1942 init_frame(s, &gb);
1943
220a6f40
MN		 1944 if (unpack_superblocks(s, &gb)){
1945 av_log(s->avctx, AV_LOG_ERROR, "error in unpack_superblocks\n");
1946 return -1;
1947 }
220a6f40
MN		 1948 if (unpack_modes(s, &gb)){
1949 av_log(s->avctx, AV_LOG_ERROR, "error in unpack_modes\n");
1950 return -1;
1951 }
220a6f40
MN		 1952 if (unpack_vectors(s, &gb)){
1953 av_log(s->avctx, AV_LOG_ERROR, "error in unpack_vectors\n");
1954 return -1;
1955 }
220a6f40
MN		 1956 if (unpack_dct_coeffs(s, &gb)){
1957 av_log(s->avctx, AV_LOG_ERROR, "error in unpack_dct_coeffs\n");
892fc83e
MM		 1958 return -1;
1959 }
d86053a4
MM		 1960
1961 reverse_dc_prediction(s, 0, s->fragment_width, s->fragment_height);
3d32b429 1962 if ((avctx->flags & CODEC_FLAG_GRAY) == 0) {
1abbf64e 1963 reverse_dc_prediction(s, s->fragment_start[1],
3d32b429 1964 s->fragment_width / 2, s->fragment_height / 2);
1abbf64e 1965 reverse_dc_prediction(s, s->fragment_start[2],
3d32b429 1966 s->fragment_width / 2, s->fragment_height / 2);
dc4b78d9 1967 }
dc4b78d9 1968
dc4b78d9
MM		 1969 for (i = 0; i < s->macroblock_height; i++)
1970 render_slice(s, i);
d86053a4 1971
72053728 1972 apply_loop_filter(s);
892fc83e 1973
d86053a4
MM		 1974 *data_size=sizeof(AVFrame);
1975 *(AVFrame*)data= s->current_frame;
1976
44ae98dd
MM		 1977 /* release the last frame, if it is allocated and if it is not the
1978 * golden frame */
1979 if ((s->last_frame.data[0]) &&
1980 (s->last_frame.data[0] != s->golden_frame.data[0]))
1981 avctx->release_buffer(avctx, &s->last_frame);
d86053a4 1982
61873c4a 1983 /* shuffle frames (last = current) */
4501e678 1984 s->last_frame= s->current_frame;
8e39d4a7 1985 s->current_frame.data[0]= NULL; /* ensure that we catch any access to this released frame */
d86053a4
MM		 1986
1987 return buf_size;
1988}
1989
1990/*
1991 * This is the ffmpeg/libavcodec API module cleanup function.
1992 */
98a6fff9 1993static av_cold int vp3_decode_end(AVCodecContext *avctx)
d86053a4
MM		 1994{
1995 Vp3DecodeContext *s = avctx->priv_data;
6f4e2b5a 1996 int i;
d86053a4 1997
6f4e2b5a 1998 av_free(s->superblock_coding);
d86053a4 1999 av_free(s->all_fragments);
36e16253 2000 av_free(s->coeff_counts);
a2df5a50 2001 av_free(s->coeffs);
d86053a4
MM		 2002 av_free(s->coded_fragment_list);
2003 av_free(s->superblock_fragments);
2004 av_free(s->superblock_macroblocks);
2005 av_free(s->macroblock_fragments);
96a7e73b 2006 av_free(s->macroblock_coding);
115329f1 2007
6f4e2b5a
MR		 2008 for (i = 0; i < 16; i++) {
2009 free_vlc(&s->dc_vlc[i]);
2010 free_vlc(&s->ac_vlc_1[i]);
2011 free_vlc(&s->ac_vlc_2[i]);
2012 free_vlc(&s->ac_vlc_3[i]);
2013 free_vlc(&s->ac_vlc_4[i]);
2014 }
2015
2016 free_vlc(&s->superblock_run_length_vlc);
2017 free_vlc(&s->fragment_run_length_vlc);
2018 free_vlc(&s->mode_code_vlc);
2019 free_vlc(&s->motion_vector_vlc);
2020
d86053a4 2021 /* release all frames */
8e39d4a7 2022 if (s->golden_frame.data[0] && s->golden_frame.data[0] != s->last_frame.data[0])
892fc83e
MM		 2023 avctx->release_buffer(avctx, &s->golden_frame);
2024 if (s->last_frame.data[0])
2025 avctx->release_buffer(avctx, &s->last_frame);
2026 /* no need to release the current_frame since it will always be pointing
2027 * to the same frame as either the golden or last frame */
d86053a4
MM		 2028
2029 return 0;
2030}
2031
39922395
MM		 2032static int read_huffman_tree(AVCodecContext *avctx, GetBitContext *gb)
2033{
2034 Vp3DecodeContext *s = avctx->priv_data;
2035
5fc32c27 2036 if (get_bits1(gb)) {
39922395
MM		 2037 int token;
2038 if (s->entries >= 32) { /* overflow */
2039 av_log(avctx, AV_LOG_ERROR, "huffman tree overflow\n");
2040 return -1;
2041 }
2042 token = get_bits(gb, 5);
2043 //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);
2044 s->huffman_table[s->hti][token][0] = s->hbits;
2045 s->huffman_table[s->hti][token][1] = s->huff_code_size;
2046 s->entries++;
2047 }
2048 else {
2049 if (s->huff_code_size >= 32) {/* overflow */
2050 av_log(avctx, AV_LOG_ERROR, "huffman tree overflow\n");
2051 return -1;
2052 }
2053 s->huff_code_size++;
2054 s->hbits <<= 1;
2055 read_huffman_tree(avctx, gb);
2056 s->hbits |= 1;
2057 read_huffman_tree(avctx, gb);
2058 s->hbits >>= 1;
2059 s->huff_code_size--;
2060 }
2061 return 0;
2062}
2063
597cbdaf 2064#ifdef CONFIG_THEORA_DECODER
e278056f 2065static int theora_decode_header(AVCodecContext *avctx, GetBitContext *gb)
f44ee2c3
AB		 2066{
2067 Vp3DecodeContext *s = avctx->priv_data;
c0f716b8 2068 int visible_width, visible_height;
9a7ad925 2069
e278056f 2070 s->theora = get_bits_long(gb, 24);
356306ac 2071 av_log(avctx, AV_LOG_DEBUG, "Theora bitstream version %X\n", s->theora);
105c3d25 2072
ba7ee4a4 2073 /* 3.2.0 aka alpha3 has the same frame orientation as original vp3 */
9a7ad925 2074 /* but previous versions have the image flipped relative to vp3 */
ba7ee4a4 2075 if (s->theora < 0x030200)
9a7ad925 2076 {
bb270c08 2077 s->flipped_image = 1;
9a7ad925
AB		 2078 av_log(avctx, AV_LOG_DEBUG, "Old (<alpha3) Theora bitstream, flipped image\n");
2079 }
f44ee2c3 2080
277e3e53
DC		 2081 visible_width = s->width = get_bits(gb, 16) << 4;
2082 visible_height = s->height = get_bits(gb, 16) << 4;
115329f1 2083
0ecca7a4 2084 if(avcodec_check_dimensions(avctx, s->width, s->height)){
7146d2c2 2085 av_log(avctx, AV_LOG_ERROR, "Invalid dimensions (%dx%d)\n", s->width, s->height);
0ecca7a4
MN		 2086 s->width= s->height= 0;
2087 return -1;
2088 }
7146d2c2
AB		 2089
2090 if (s->theora >= 0x030400)
2091 {
e278056f 2092 skip_bits(gb, 32); /* total number of superblocks in a frame */
bb270c08 2093 // fixme, the next field is 36bits long
e278056f
MN		 2094 skip_bits(gb, 32); /* total number of blocks in a frame */
2095 skip_bits(gb, 4); /* total number of blocks in a frame */
2096 skip_bits(gb, 32); /* total number of macroblocks in a frame */
7146d2c2 2097 }
f44ee2c3 2098
277e3e53 2099 if (s->theora >= 0x030200) {
a0ce2d1b
DC		 2100 visible_width = get_bits_long(gb, 24);
2101 visible_height = get_bits_long(gb, 24);
c0f716b8 2102
ba4816a0
AJ		 2103 skip_bits(gb, 8); /* offset x */
2104 skip_bits(gb, 8); /* offset y */
2105 }
f44ee2c3 2106
e278056f
MN		 2107 skip_bits(gb, 32); /* fps numerator */
2108 skip_bits(gb, 32); /* fps denumerator */
2109 skip_bits(gb, 24); /* aspect numerator */
2110 skip_bits(gb, 24); /* aspect denumerator */
115329f1 2111
ba7ee4a4 2112 if (s->theora < 0x030200)
e278056f
MN		 2113 skip_bits(gb, 5); /* keyframe frequency force */
2114 skip_bits(gb, 8); /* colorspace */
7146d2c2 2115 if (s->theora >= 0x030400)
e278056f
MN		 2116 skip_bits(gb, 2); /* pixel format: 420,res,422,444 */
2117 skip_bits(gb, 24); /* bitrate */
f44ee2c3 2118
e278056f 2119 skip_bits(gb, 6); /* quality hint */
115329f1 2120
ba7ee4a4 2121 if (s->theora >= 0x030200)
105c3d25 2122 {
e278056f 2123 skip_bits(gb, 5); /* keyframe frequency force */
115329f1 2124
bb270c08 2125 if (s->theora < 0x030400)
e278056f 2126 skip_bits(gb, 5); /* spare bits */
105c3d25 2127 }
115329f1 2128
e278056f 2129// align_get_bits(gb);
115329f1 2130
c0f716b8
AJ		 2131 if ( visible_width <= s->width && visible_width > s->width-16
2132 && visible_height <= s->height && visible_height > s->height-16)
2133 avcodec_set_dimensions(avctx, visible_width, visible_height);
2134 else
2135 avcodec_set_dimensions(avctx, s->width, s->height);
f44ee2c3 2136
f44ee2c3
AB		 2137 return 0;
2138}
2139
e278056f 2140static int theora_decode_tables(AVCodecContext *avctx, GetBitContext *gb)
f44ee2c3
AB		 2141{
2142 Vp3DecodeContext *s = avctx->priv_data;
ae1dd8e1 2143 int i, n, matrices, inter, plane;
ba7ee4a4
MC		 2144
2145 if (s->theora >= 0x030200) {
e278056f 2146 n = get_bits(gb, 3);
9c7154c7 2147 /* loop filter limit values table */
ba7ee4a4 2148 for (i = 0; i < 64; i++)
e278056f 2149 s->filter_limit_values[i] = get_bits(gb, n);
ba7ee4a4 2150 }
115329f1 2151
ba7ee4a4 2152 if (s->theora >= 0x030200)
e278056f 2153 n = get_bits(gb, 4) + 1;
ba7ee4a4
MC		 2154 else
2155 n = 16;
f44ee2c3
AB		 2156 /* quality threshold table */
2157 for (i = 0; i < 64; i++)
e278056f 2158 s->coded_ac_scale_factor[i] = get_bits(gb, n);
f44ee2c3 2159
ba7ee4a4 2160 if (s->theora >= 0x030200)
e278056f 2161 n = get_bits(gb, 4) + 1;
ba7ee4a4
MC		 2162 else
2163 n = 16;
f44ee2c3
AB		 2164 /* dc scale factor table */
2165 for (i = 0; i < 64; i++)
e278056f 2166 s->coded_dc_scale_factor[i] = get_bits(gb, n);
f44ee2c3 2167
ba7ee4a4 2168 if (s->theora >= 0x030200)
e278056f 2169 matrices = get_bits(gb, 9) + 1;
ba7ee4a4 2170 else
2da2ba03 2171 matrices = 3;
f44ee2c3 2172
ae1dd8e1
MN		 2173 if(matrices > 384){
2174 av_log(avctx, AV_LOG_ERROR, "invalid number of base matrixes\n");
2175 return -1;
2176 }
3c3f113e 2177
ae1dd8e1 2178 for(n=0; n<matrices; n++){
bb270c08 2179 for (i = 0; i < 64; i++)
ae1dd8e1
MN		 2180 s->base_matrix[n][i]= get_bits(gb, 8);
2181 }
2da2ba03 2182
ae1dd8e1
MN		 2183 for (inter = 0; inter <= 1; inter++) {
2184 for (plane = 0; plane <= 2; plane++) {
2185 int newqr= 1;
2186 if (inter || plane > 0)
5fc32c27 2187 newqr = get_bits1(gb);
39922395 2188 if (!newqr) {
ae1dd8e1 2189 int qtj, plj;
5fc32c27 2190 if(inter && get_bits1(gb)){
ae1dd8e1
MN		 2191 qtj = 0;
2192 plj = plane;
2193 }else{
2194 qtj= (3*inter + plane - 1) / 3;
2195 plj= (plane + 2) % 3;
2196 }
2197 s->qr_count[inter][plane]= s->qr_count[qtj][plj];
2198 memcpy(s->qr_size[inter][plane], s->qr_size[qtj][plj], sizeof(s->qr_size[0][0]));
2199 memcpy(s->qr_base[inter][plane], s->qr_base[qtj][plj], sizeof(s->qr_base[0][0]));
2200 } else {
2201 int qri= 0;
39922395 2202 int qi = 0;
ae1dd8e1
MN		 2203
2204 for(;;){
2205 i= get_bits(gb, av_log2(matrices-1)+1);
2206 if(i>= matrices){
2207 av_log(avctx, AV_LOG_ERROR, "invalid base matrix index\n");
2208 return -1;
2209 }
2210 s->qr_base[inter][plane][qri]= i;
2211 if(qi >= 63)
2212 break;
2213 i = get_bits(gb, av_log2(63-qi)+1) + 1;
2214 s->qr_size[inter][plane][qri++]= i;
2215 qi += i;
39922395 2216 }
ae1dd8e1 2217
2da2ba03 2218 if (qi > 63) {
7146d2c2 2219 av_log(avctx, AV_LOG_ERROR, "invalid qi %d > 63\n", qi);
bb270c08
DB		 2220 return -1;
2221 }
ae1dd8e1 2222 s->qr_count[inter][plane]= qri;
39922395
MM		 2223 }
2224 }
2225 }
2226
2da2ba03 2227 /* Huffman tables */
39922395
MM		 2228 for (s->hti = 0; s->hti < 80; s->hti++) {
2229 s->entries = 0;
2230 s->huff_code_size = 1;
5fc32c27 2231 if (!get_bits1(gb)) {
39922395 2232 s->hbits = 0;
e278056f 2233 read_huffman_tree(avctx, gb);
39922395 2234 s->hbits = 1;
e278056f 2235 read_huffman_tree(avctx, gb);
39922395
MM		 2236 }
2237 }
115329f1 2238
f44ee2c3 2239 s->theora_tables = 1;
115329f1 2240
f44ee2c3
AB		 2241 return 0;
2242}
2243
2244static int theora_decode_init(AVCodecContext *avctx)
2245{
2246 Vp3DecodeContext *s = avctx->priv_data;
2247 GetBitContext gb;
2248 int ptype;
da91ed59
AJ		 2249 uint8_t *header_start[3];
2250 int header_len[3];
2251 int i;
115329f1 2252
f44ee2c3
AB		 2253 s->theora = 1;
2254
2255 if (!avctx->extradata_size)
7146d2c2
AB		 2256 {
2257 av_log(avctx, AV_LOG_ERROR, "Missing extradata!\n");
bb270c08 2258 return -1;
7146d2c2 2259 }
f44ee2c3 2260
da91ed59
AJ		 2261 if (ff_split_xiph_headers(avctx->extradata, avctx->extradata_size,
2262 42, header_start, header_len) < 0) {
2263 av_log(avctx, AV_LOG_ERROR, "Corrupt extradata\n");
2264 return -1;
2265 }
ee89b2b9 2266
da91ed59
AJ		 2267 for(i=0;i<3;i++) {
2268 init_get_bits(&gb, header_start[i], header_len[i]);
f44ee2c3
AB		 2269
2270 ptype = get_bits(&gb, 8);
115329f1 2271
7146d2c2
AB		 2272 if (!(ptype & 0x80))
2273 {
2274 av_log(avctx, AV_LOG_ERROR, "Invalid extradata!\n");
e278056f 2275// return -1;
115329f1 2276 }
7146d2c2 2277
3700dab4 2278 // FIXME: Check for this as well.
f44ee2c3 2279 skip_bits(&gb, 6*8); /* "theora" */
115329f1 2280
f44ee2c3
AB		 2281 switch(ptype)
2282 {
2283 case 0x80:
e278056f 2284 theora_decode_header(avctx, &gb);
bb270c08
DB		 2285 break;
2286 case 0x81:
2da2ba03 2287// FIXME: is this needed? it breaks sometimes
bb270c08
DB		 2288// theora_decode_comments(avctx, gb);
2289 break;
2290 case 0x82:
e278056f 2291 theora_decode_tables(avctx, &gb);
bb270c08
DB		 2292 break;
2293 default:
2294 av_log(avctx, AV_LOG_ERROR, "Unknown Theora config packet: %d\n", ptype&~0x80);
2295 break;
f44ee2c3 2296 }
12ce1f3f
DC		 2297 if(ptype != 0x81 && 8*header_len[i] != get_bits_count(&gb))
2298 av_log(avctx, AV_LOG_WARNING, "%d bits left in packet %X\n", 8*header_len[i] - get_bits_count(&gb), ptype);
116d866c
MC		 2299 if (s->theora < 0x030200)
2300 break;
ee89b2b9 2301 }
f44ee2c3 2302
ba7ee4a4 2303 vp3_decode_init(avctx);
f44ee2c3
AB		 2304 return 0;
2305}
2306
6f6a3e2a
DB		 2307AVCodec theora_decoder = {
2308 "theora",
d86053a4 2309 CODEC_TYPE_VIDEO,
6f6a3e2a 2310 CODEC_ID_THEORA,
d86053a4 2311 sizeof(Vp3DecodeContext),
6f6a3e2a 2312 theora_decode_init,
d86053a4
MM		 2313 NULL,
2314 vp3_decode_end,
2315 vp3_decode_frame,
2316 0,
d5202e4f 2317 NULL,
fe4bf374 2318 .long_name = NULL_IF_CONFIG_SMALL("Theora"),
d86053a4 2319};
6f6a3e2a 2320#endif
f44ee2c3 2321
6f6a3e2a
DB		 2322AVCodec vp3_decoder = {
2323 "vp3",
f44ee2c3 2324 CODEC_TYPE_VIDEO,
6f6a3e2a 2325 CODEC_ID_VP3,
f44ee2c3 2326 sizeof(Vp3DecodeContext),
6f6a3e2a 2327 vp3_decode_init,
f44ee2c3
AB		 2328 NULL,
2329 vp3_decode_end,
2330 vp3_decode_frame,
2331 0,
d5202e4f 2332 NULL,
fe4bf374 2333 .long_name = NULL_IF_CONFIG_SMALL("On2 VP3"),
f44ee2c3 2334};
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