Add APIchanges entry for the libavutil/error.h addition.
[libav.git] / libavcodec / vp3.c
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d86053a4 1/*
67335dbc 2 * Copyright (C) 2003-2004 the ffmpeg project
d86053a4 3 *
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4 * This file is part of FFmpeg.
5 *
6 * FFmpeg is free software; you can redistribute it and/or
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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,
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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
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19 */
20
21/**
bad5537e 22 * @file libavcodec/vp3.c
d86053a4 23 * On2 VP3 Video Decoder
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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
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28 *
29 * Theora decoder by Alex Beregszaszi
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30 */
31
32#include <stdio.h>
33#include <stdlib.h>
34#include <string.h>
d86053a4 35
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36#include "avcodec.h"
37#include "dsputil.h"
9106a698 38#include "get_bits.h"
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39
40#include "vp3data.h"
da91ed59 41#include "xiph.h"
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42
43#define FRAGMENT_PIXELS 8
44
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45static av_cold int vp3_decode_end(AVCodecContext *avctx);
46
7beddb12 47//FIXME split things out into their own arrays
d86053a4 48typedef struct Vp3Fragment {
c72625f2 49 int16_t dc;
288774bb 50 uint8_t coding_method;
288774bb
MN
51 int8_t motion_x;
52 int8_t motion_y;
f2264fa5 53 uint8_t qpi;
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54} Vp3Fragment;
55
56#define SB_NOT_CODED 0
57#define SB_PARTIALLY_CODED 1
58#define SB_FULLY_CODED 2
59
ecb51b25
DC
60// This is the maximum length of a single long bit run that can be encoded
61// for superblock coding or block qps. Theora special-cases this to read a
62// bit instead of flipping the current bit to allow for runs longer than 4129.
63#define MAXIMUM_LONG_BIT_RUN 4129
64
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65#define MODE_INTER_NO_MV 0
66#define MODE_INTRA 1
67#define MODE_INTER_PLUS_MV 2
68#define MODE_INTER_LAST_MV 3
69#define MODE_INTER_PRIOR_LAST 4
70#define MODE_USING_GOLDEN 5
71#define MODE_GOLDEN_MV 6
72#define MODE_INTER_FOURMV 7
73#define CODING_MODE_COUNT 8
74
75/* special internal mode */
76#define MODE_COPY 8
77
78/* There are 6 preset schemes, plus a free-form scheme */
e8e47435 79static const int ModeAlphabet[6][CODING_MODE_COUNT] =
d86053a4 80{
d86053a4 81 /* scheme 1: Last motion vector dominates */
115329f1 82 { MODE_INTER_LAST_MV, MODE_INTER_PRIOR_LAST,
d86053a4 83 MODE_INTER_PLUS_MV, MODE_INTER_NO_MV,
115329f1 84 MODE_INTRA, MODE_USING_GOLDEN,
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85 MODE_GOLDEN_MV, MODE_INTER_FOURMV },
86
87 /* scheme 2 */
115329f1 88 { MODE_INTER_LAST_MV, MODE_INTER_PRIOR_LAST,
d86053a4 89 MODE_INTER_NO_MV, MODE_INTER_PLUS_MV,
115329f1 90 MODE_INTRA, MODE_USING_GOLDEN,
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91 MODE_GOLDEN_MV, MODE_INTER_FOURMV },
92
93 /* scheme 3 */
115329f1 94 { MODE_INTER_LAST_MV, MODE_INTER_PLUS_MV,
d86053a4 95 MODE_INTER_PRIOR_LAST, MODE_INTER_NO_MV,
115329f1 96 MODE_INTRA, MODE_USING_GOLDEN,
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97 MODE_GOLDEN_MV, MODE_INTER_FOURMV },
98
99 /* scheme 4 */
115329f1 100 { MODE_INTER_LAST_MV, MODE_INTER_PLUS_MV,
d86053a4 101 MODE_INTER_NO_MV, MODE_INTER_PRIOR_LAST,
115329f1 102 MODE_INTRA, MODE_USING_GOLDEN,
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103 MODE_GOLDEN_MV, MODE_INTER_FOURMV },
104
105 /* scheme 5: No motion vector dominates */
115329f1 106 { MODE_INTER_NO_MV, MODE_INTER_LAST_MV,
d86053a4 107 MODE_INTER_PRIOR_LAST, MODE_INTER_PLUS_MV,
115329f1 108 MODE_INTRA, MODE_USING_GOLDEN,
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109 MODE_GOLDEN_MV, MODE_INTER_FOURMV },
110
111 /* scheme 6 */
115329f1 112 { MODE_INTER_NO_MV, MODE_USING_GOLDEN,
d86053a4 113 MODE_INTER_LAST_MV, MODE_INTER_PRIOR_LAST,
115329f1 114 MODE_INTER_PLUS_MV, MODE_INTRA,
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115 MODE_GOLDEN_MV, MODE_INTER_FOURMV },
116
117};
118
7a095ea6
DC
119static const uint8_t hilbert_offset[16][2] = {
120 {0,0}, {1,0}, {1,1}, {0,1},
121 {0,2}, {0,3}, {1,3}, {1,2},
122 {2,2}, {2,3}, {3,3}, {3,2},
123 {3,1}, {2,1}, {2,0}, {3,0}
124};
125
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126#define MIN_DEQUANT_VAL 2
127
128typedef struct Vp3DecodeContext {
129 AVCodecContext *avctx;
f44ee2c3 130 int theora, theora_tables;
3c3f113e 131 int version;
d86053a4 132 int width, height;
1e76a1da 133 int chroma_x_shift, chroma_y_shift;
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134 AVFrame golden_frame;
135 AVFrame last_frame;
136 AVFrame current_frame;
137 int keyframe;
138 DSPContext dsp;
9a7ad925 139 int flipped_image;
a8de3901 140 int last_slice_end;
d86053a4 141
f2264fa5
DC
142 int qps[3];
143 int nqps;
144 int last_qps[3];
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145
146 int superblock_count;
892fc83e
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147 int y_superblock_width;
148 int y_superblock_height;
35c28d23 149 int y_superblock_count;
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150 int c_superblock_width;
151 int c_superblock_height;
35c28d23 152 int c_superblock_count;
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153 int u_superblock_start;
154 int v_superblock_start;
155 unsigned char *superblock_coding;
156
157 int macroblock_count;
158 int macroblock_width;
159 int macroblock_height;
160
161 int fragment_count;
57783884
DC
162 int fragment_width[2];
163 int fragment_height[2];
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164
165 Vp3Fragment *all_fragments;
1abbf64e 166 int fragment_start[3];
735acf56 167 int data_offset[3];
115329f1 168
36af0c95 169 ScanTable scantable;
115329f1 170
f44ee2c3
AB
171 /* tables */
172 uint16_t coded_dc_scale_factor[64];
67335dbc 173 uint32_t coded_ac_scale_factor[64];
ae1dd8e1
MN
174 uint8_t base_matrix[384][64];
175 uint8_t qr_count[2][3];
176 uint8_t qr_size [2][3][64];
177 uint16_t qr_base[2][3][64];
d86053a4 178
c72625f2
DC
179 /**
180 * This is a list of all tokens in bitstream order. Reordering takes place
181 * by pulling from each level during IDCT. As a consequence, IDCT must be
182 * in Hilbert order, making the minimum slice height 64 for 4:2:0 and 32
183 * otherwise. The 32 different tokens with up to 12 bits of extradata are
184 * collapsed into 3 types, packed as follows:
185 * (from the low to high bits)
186 *
187 * 2 bits: type (0,1,2)
188 * 0: EOB run, 14 bits for run length (12 needed)
189 * 1: zero run, 7 bits for run length
190 * 7 bits for the next coefficient (3 needed)
191 * 2: coefficient, 14 bits (11 needed)
192 *
193 * Coefficients are signed, so are packed in the highest bits for automatic
194 * sign extension.
195 */
196 int16_t *dct_tokens[3][64];
197 int16_t *dct_tokens_base;
198#define TOKEN_EOB(eob_run) ((eob_run) << 2)
199#define TOKEN_ZERO_RUN(coeff, zero_run) (((coeff) << 9) + ((zero_run) << 2) + 1)
200#define TOKEN_COEFF(coeff) (((coeff) << 2) + 2)
201
202 /**
203 * number of blocks that contain DCT coefficients at the given level or higher
204 */
205 int num_coded_frags[3][64];
206 int total_num_coded_frags;
207
f4433de9 208 /* this is a list of indexes into the all_fragments array indicating
d86053a4 209 * which of the fragments are coded */
c72625f2 210 int *coded_fragment_list[3];
098523eb 211
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212 VLC dc_vlc[16];
213 VLC ac_vlc_1[16];
214 VLC ac_vlc_2[16];
215 VLC ac_vlc_3[16];
216 VLC ac_vlc_4[16];
217
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218 VLC superblock_run_length_vlc;
219 VLC fragment_run_length_vlc;
220 VLC mode_code_vlc;
221 VLC motion_vector_vlc;
222
38acbc3c
MM
223 /* these arrays need to be on 16-byte boundaries since SSE2 operations
224 * index into them */
84dc2d8a 225 DECLARE_ALIGNED(16, int16_t, qmat)[3][2][3][64]; //<qmat[qpi][is_inter][plane]
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226
227 /* This table contains superblock_count * 16 entries. Each set of 16
f4433de9 228 * numbers corresponds to the fragment indexes 0..15 of the superblock.
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229 * An entry will be -1 to indicate that no entry corresponds to that
230 * index. */
231 int *superblock_fragments;
232
115329f1 233 /* This is an array that indicates how a particular macroblock
74c0ac12 234 * is coded. */
96a7e73b 235 unsigned char *macroblock_coding;
d86053a4 236
a2f11b3c 237 uint8_t edge_emu_buffer[9*2048]; //FIXME dynamic alloc
191e8ca7 238 int8_t qscale_table[2048]; //FIXME dynamic alloc (width+15)/16
39922395 239
f44b08a5
MM
240 /* Huffman decode */
241 int hti;
242 unsigned int hbits;
243 int entries;
244 int huff_code_size;
245 uint16_t huffman_table[80][32][2];
246
51ace577 247 uint8_t filter_limit_values[64];
84dc2d8a 248 DECLARE_ALIGNED(8, int, bounding_values_array)[256+2];
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249} Vp3DecodeContext;
250
251/************************************************************************
252 * VP3 specific functions
253 ************************************************************************/
254
255/*
256 * This function sets up all of the various blocks mappings:
257 * superblocks <-> fragments, macroblocks <-> fragments,
258 * superblocks <-> macroblocks
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MM
259 *
260 * Returns 0 is successful; returns 1 if *anything* went wrong.
d86053a4 261 */
115329f1 262static int init_block_mapping(Vp3DecodeContext *s)
d86053a4 263{
a16389c1
DC
264 int sb_x, sb_y, plane;
265 int x, y, i, j = 0;
266
267 for (plane = 0; plane < 3; plane++) {
268 int sb_width = plane ? s->c_superblock_width : s->y_superblock_width;
269 int sb_height = plane ? s->c_superblock_height : s->y_superblock_height;
57783884
DC
270 int frag_width = s->fragment_width[!!plane];
271 int frag_height = s->fragment_height[!!plane];
a16389c1
DC
272
273 for (sb_y = 0; sb_y < sb_height; sb_y++)
274 for (sb_x = 0; sb_x < sb_width; sb_x++)
275 for (i = 0; i < 16; i++) {
276 x = 4*sb_x + hilbert_offset[i][0];
277 y = 4*sb_y + hilbert_offset[i][1];
278
279 if (x < frag_width && y < frag_height)
280 s->superblock_fragments[j++] = s->fragment_start[plane] + y*frag_width + x;
281 else
282 s->superblock_fragments[j++] = -1;
283 }
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284 }
285
892fc83e 286 return 0; /* successful path out */
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287}
288
289/*
f44b08a5 290 * This function sets up the dequantization tables used for a particular
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291 * frame.
292 */
f2264fa5 293static void init_dequantizer(Vp3DecodeContext *s, int qpi)
d86053a4 294{
f2264fa5
DC
295 int ac_scale_factor = s->coded_ac_scale_factor[s->qps[qpi]];
296 int dc_scale_factor = s->coded_dc_scale_factor[s->qps[qpi]];
36c32bdd 297 int i, plane, inter, qri, bmi, bmj, qistart;
d86053a4 298
ae1dd8e1
MN
299 for(inter=0; inter<2; inter++){
300 for(plane=0; plane<3; plane++){
301 int sum=0;
302 for(qri=0; qri<s->qr_count[inter][plane]; qri++){
303 sum+= s->qr_size[inter][plane][qri];
f2264fa5 304 if(s->qps[qpi] <= sum)
ae1dd8e1
MN
305 break;
306 }
307 qistart= sum - s->qr_size[inter][plane][qri];
308 bmi= s->qr_base[inter][plane][qri ];
309 bmj= s->qr_base[inter][plane][qri+1];
310 for(i=0; i<64; i++){
f2264fa5
DC
311 int coeff= ( 2*(sum -s->qps[qpi])*s->base_matrix[bmi][i]
312 - 2*(qistart-s->qps[qpi])*s->base_matrix[bmj][i]
ae1dd8e1
MN
313 + s->qr_size[inter][plane][qri])
314 / (2*s->qr_size[inter][plane][qri]);
315
a14ab4e4 316 int qmin= 8<<(inter + !i);
ae1dd8e1
MN
317 int qscale= i ? ac_scale_factor : dc_scale_factor;
318
f2264fa5 319 s->qmat[qpi][inter][plane][s->dsp.idct_permutation[i]]= av_clip((qscale * coeff)/100 * 4, qmin, 4096);
ae1dd8e1 320 }
f2264fa5
DC
321 // all DC coefficients use the same quant so as not to interfere with DC prediction
322 s->qmat[qpi][inter][plane][0] = s->qmat[0][inter][plane][0];
ae1dd8e1 323 }
d86053a4 324 }
115329f1 325
f2264fa5 326 memset(s->qscale_table, (FFMAX(s->qmat[0][0][0][1], s->qmat[0][0][1][1])+8)/16, 512); //FIXME finetune
d86053a4
MM
327}
328
329/*
f44b08a5
MM
330 * This function initializes the loop filter boundary limits if the frame's
331 * quality index is different from the previous frame's.
7fa5f999
RD
332 *
333 * The filter_limit_values may not be larger than 127.
f44b08a5
MM
334 */
335static void init_loop_filter(Vp3DecodeContext *s)
336{
337 int *bounding_values= s->bounding_values_array+127;
338 int filter_limit;
339 int x;
7fa5f999 340 int value;
f44b08a5 341
f2264fa5 342 filter_limit = s->filter_limit_values[s->qps[0]];
f44b08a5
MM
343
344 /* set up the bounding values */
345 memset(s->bounding_values_array, 0, 256 * sizeof(int));
346 for (x = 0; x < filter_limit; x++) {
f44b08a5
MM
347 bounding_values[-x] = -x;
348 bounding_values[x] = x;
f44b08a5 349 }
7fa5f999
RD
350 for (x = value = filter_limit; x < 128 && value; x++, value--) {
351 bounding_values[ x] = value;
352 bounding_values[-x] = -value;
353 }
354 if (value)
355 bounding_values[128] = value;
357f45d9 356 bounding_values[129] = bounding_values[130] = filter_limit * 0x02020202;
f44b08a5
MM
357}
358
359/*
115329f1 360 * This function unpacks all of the superblock/macroblock/fragment coding
d86053a4
MM
361 * information from the bitstream.
362 */
892fc83e 363static int unpack_superblocks(Vp3DecodeContext *s, GetBitContext *gb)
d86053a4 364{
e2720b6b 365 int superblock_starts[3] = { 0, s->u_superblock_start, s->v_superblock_start };
d86053a4
MM
366 int bit = 0;
367 int current_superblock = 0;
368 int current_run = 0;
855c720c 369 int num_partial_superblocks = 0;
d86053a4
MM
370
371 int i, j;
372 int current_fragment;
35c28d23 373 int plane;
d86053a4 374
d86053a4 375 if (s->keyframe) {
d86053a4
MM
376 memset(s->superblock_coding, SB_FULLY_CODED, s->superblock_count);
377
378 } else {
379
380 /* unpack the list of partially-coded superblocks */
5fc32c27 381 bit = get_bits1(gb);
d86053a4 382 while (current_superblock < s->superblock_count) {
115329f1 383 current_run = get_vlc2(gb,
33dbc1b7
DC
384 s->superblock_run_length_vlc.table, 6, 2) + 1;
385 if (current_run == 34)
d8278bab 386 current_run += get_bits(gb, 12);
d86053a4 387
33dbc1b7
DC
388 if (current_superblock + current_run > s->superblock_count) {
389 av_log(s->avctx, AV_LOG_ERROR, "Invalid partially coded superblock run length\n");
390 return -1;
391 }
392
393 memset(s->superblock_coding + current_superblock, bit, current_run);
394
395 current_superblock += current_run;
855c720c
DC
396 if (bit)
397 num_partial_superblocks += current_run;
33dbc1b7 398
a8926476
DC
399 if (s->theora && current_run == MAXIMUM_LONG_BIT_RUN)
400 bit = get_bits1(gb);
401 else
33dbc1b7 402 bit ^= 1;
d86053a4
MM
403 }
404
405 /* unpack the list of fully coded superblocks if any of the blocks were
406 * not marked as partially coded in the previous step */
855c720c
DC
407 if (num_partial_superblocks < s->superblock_count) {
408 int superblocks_decoded = 0;
d86053a4
MM
409
410 current_superblock = 0;
5fc32c27 411 bit = get_bits1(gb);
855c720c 412 while (superblocks_decoded < s->superblock_count - num_partial_superblocks) {
115329f1 413 current_run = get_vlc2(gb,
855c720c
DC
414 s->superblock_run_length_vlc.table, 6, 2) + 1;
415 if (current_run == 34)
d8278bab 416 current_run += get_bits(gb, 12);
855c720c
DC
417
418 for (j = 0; j < current_run; current_superblock++) {
419 if (current_superblock >= s->superblock_count) {
420 av_log(s->avctx, AV_LOG_ERROR, "Invalid fully coded superblock run length\n");
421 return -1;
d86053a4 422 }
855c720c
DC
423
424 /* skip any superblocks already marked as partially coded */
425 if (s->superblock_coding[current_superblock] == SB_NOT_CODED) {
b5da3635 426 s->superblock_coding[current_superblock] = 2*bit;
855c720c
DC
427 j++;
428 }
d86053a4 429 }
855c720c
DC
430 superblocks_decoded += current_run;
431
a8926476
DC
432 if (s->theora && current_run == MAXIMUM_LONG_BIT_RUN)
433 bit = get_bits1(gb);
434 else
855c720c 435 bit ^= 1;
d86053a4
MM
436 }
437 }
438
439 /* if there were partial blocks, initialize bitstream for
440 * unpacking fragment codings */
855c720c 441 if (num_partial_superblocks) {
d86053a4
MM
442
443 current_run = 0;
5fc32c27 444 bit = get_bits1(gb);
115329f1 445 /* toggle the bit because as soon as the first run length is
d86053a4
MM
446 * fetched the bit will be toggled again */
447 bit ^= 1;
448 }
449 }
450
451 /* figure out which fragments are coded; iterate through each
452 * superblock (all planes) */
c72625f2 453 s->total_num_coded_frags = 0;
96a7e73b 454 memset(s->macroblock_coding, MODE_COPY, s->macroblock_count);
35c28d23
DC
455
456 for (plane = 0; plane < 3; plane++) {
e2720b6b 457 int sb_start = superblock_starts[plane];
35c28d23 458 int sb_end = sb_start + (plane ? s->c_superblock_count : s->y_superblock_count);
c72625f2 459 int num_coded_frags = 0;
35c28d23
DC
460
461 for (i = sb_start; i < sb_end; i++) {
d86053a4
MM
462
463 /* iterate through all 16 fragments in a superblock */
464 for (j = 0; j < 16; j++) {
465
466 /* if the fragment is in bounds, check its coding status */
467 current_fragment = s->superblock_fragments[i * 16 + j];
468 if (current_fragment != -1) {
6cb35b45 469 int coded = s->superblock_coding[i];
d86053a4 470
6cb35b45 471 if (s->superblock_coding[i] == SB_PARTIALLY_CODED) {
d86053a4
MM
472
473 /* fragment may or may not be coded; this is the case
474 * that cares about the fragment coding runs */
b5da3635 475 if (current_run-- == 0) {
d86053a4 476 bit ^= 1;
115329f1 477 current_run = get_vlc2(gb,
b5da3635 478 s->fragment_run_length_vlc.table, 5, 2);
d86053a4 479 }
6cb35b45
DC
480 coded = bit;
481 }
d86053a4 482
6cb35b45 483 if (coded) {
115329f1 484 /* default mode; actual mode will be decoded in
22493ab9 485 * the next phase */
115329f1 486 s->all_fragments[current_fragment].coding_method =
d86053a4 487 MODE_INTER_NO_MV;
c72625f2 488 s->coded_fragment_list[plane][num_coded_frags++] =
d86053a4 489 current_fragment;
d86053a4
MM
490 } else {
491 /* not coded; copy this fragment from the prior frame */
492 s->all_fragments[current_fragment].coding_method =
493 MODE_COPY;
d86053a4 494 }
d86053a4
MM
495 }
496 }
497 }
c72625f2
DC
498 s->total_num_coded_frags += num_coded_frags;
499 for (i = 0; i < 64; i++)
500 s->num_coded_frags[plane][i] = num_coded_frags;
501 if (plane < 2)
502 s->coded_fragment_list[plane+1] = s->coded_fragment_list[plane] + num_coded_frags;
35c28d23 503 }
892fc83e 504 return 0;
d86053a4
MM
505}
506
507/*
508 * This function unpacks all the coding mode data for individual macroblocks
509 * from the bitstream.
510 */
892fc83e 511static int unpack_modes(Vp3DecodeContext *s, GetBitContext *gb)
d86053a4 512{
19cd517d 513 int i, j, k, sb_x, sb_y;
d86053a4
MM
514 int scheme;
515 int current_macroblock;
516 int current_fragment;
517 int coding_mode;
e8e47435 518 int custom_mode_alphabet[CODING_MODE_COUNT];
7c2e31d1 519 const int *alphabet;
1e76a1da 520 Vp3Fragment *frag;
d86053a4 521
d86053a4 522 if (s->keyframe) {
d86053a4
MM
523 for (i = 0; i < s->fragment_count; i++)
524 s->all_fragments[i].coding_method = MODE_INTRA;
525
526 } else {
527
528 /* fetch the mode coding scheme for this frame */
529 scheme = get_bits(gb, 3);
d86053a4
MM
530
531 /* is it a custom coding scheme? */
532 if (scheme == 0) {
d86053a4 533 for (i = 0; i < 8; i++)
2c823b3c
AC
534 custom_mode_alphabet[i] = MODE_INTER_NO_MV;
535 for (i = 0; i < 8; i++)
e8e47435 536 custom_mode_alphabet[get_bits(gb, 3)] = i;
7c2e31d1
DC
537 alphabet = custom_mode_alphabet;
538 } else
539 alphabet = ModeAlphabet[scheme-1];
d86053a4 540
d86053a4
MM
541 /* iterate through all of the macroblocks that contain 1 or more
542 * coded fragments */
19cd517d
DC
543 for (sb_y = 0; sb_y < s->y_superblock_height; sb_y++) {
544 for (sb_x = 0; sb_x < s->y_superblock_width; sb_x++) {
d86053a4
MM
545
546 for (j = 0; j < 4; j++) {
19cd517d
DC
547 int mb_x = 2*sb_x + (j>>1);
548 int mb_y = 2*sb_y + (((j>>1)+j)&1);
549 current_macroblock = mb_y * s->macroblock_width + mb_x;
550
15675ce6 551 if (mb_x >= s->macroblock_width || mb_y >= s->macroblock_height)
d86053a4
MM
552 continue;
553
ea676144
DC
554#define BLOCK_X (2*mb_x + (k&1))
555#define BLOCK_Y (2*mb_y + (k>>1))
15675ce6
DC
556 /* coding modes are only stored if the macroblock has at least one
557 * luma block coded, otherwise it must be INTER_NO_MV */
558 for (k = 0; k < 4; k++) {
57783884 559 current_fragment = BLOCK_Y*s->fragment_width[0] + BLOCK_X;
15675ce6
DC
560 if (s->all_fragments[current_fragment].coding_method != MODE_COPY)
561 break;
562 }
563 if (k == 4) {
564 s->macroblock_coding[current_macroblock] = MODE_INTER_NO_MV;
565 continue;
566 }
ea676144 567
d86053a4
MM
568 /* mode 7 means get 3 bits for each coding mode */
569 if (scheme == 7)
570 coding_mode = get_bits(gb, 3);
571 else
7c2e31d1 572 coding_mode = alphabet
0ad72bdd 573 [get_vlc2(gb, s->mode_code_vlc.table, 3, 3)];
d86053a4 574
96a7e73b 575 s->macroblock_coding[current_macroblock] = coding_mode;
ea676144 576 for (k = 0; k < 4; k++) {
1e76a1da
DC
577 frag = s->all_fragments + BLOCK_Y*s->fragment_width[0] + BLOCK_X;
578 if (frag->coding_method != MODE_COPY)
579 frag->coding_method = coding_mode;
ea676144 580 }
1e76a1da
DC
581
582#define SET_CHROMA_MODES \
583 if (frag[s->fragment_start[1]].coding_method != MODE_COPY) \
584 frag[s->fragment_start[1]].coding_method = coding_mode;\
585 if (frag[s->fragment_start[2]].coding_method != MODE_COPY) \
586 frag[s->fragment_start[2]].coding_method = coding_mode;
587
588 if (s->chroma_y_shift) {
589 frag = s->all_fragments + mb_y*s->fragment_width[1] + mb_x;
590 SET_CHROMA_MODES
591 } else if (s->chroma_x_shift) {
592 frag = s->all_fragments + 2*mb_y*s->fragment_width[1] + mb_x;
593 for (k = 0; k < 2; k++) {
594 SET_CHROMA_MODES
595 frag += s->fragment_width[1];
596 }
597 } else {
598 for (k = 0; k < 4; k++) {
599 frag = s->all_fragments + BLOCK_Y*s->fragment_width[1] + BLOCK_X;
600 SET_CHROMA_MODES
601 }
d86053a4 602 }
d86053a4 603 }
19cd517d 604 }
d86053a4
MM
605 }
606 }
892fc83e
MM
607
608 return 0;
44ae98dd
MM
609}
610
611/*
d86053a4
MM
612 * This function unpacks all the motion vectors for the individual
613 * macroblocks from the bitstream.
614 */
892fc83e 615static int unpack_vectors(Vp3DecodeContext *s, GetBitContext *gb)
d86053a4 616{
eb691ef2 617 int j, k, sb_x, sb_y;
d86053a4 618 int coding_mode;
1c183aa4
DC
619 int motion_x[4];
620 int motion_y[4];
d86053a4
MM
621 int last_motion_x = 0;
622 int last_motion_y = 0;
623 int prior_last_motion_x = 0;
624 int prior_last_motion_y = 0;
625 int current_macroblock;
626 int current_fragment;
1e76a1da 627 Vp3Fragment *frag;
d86053a4 628
6599e2a7 629 if (s->keyframe)
6298f49f 630 return 0;
10f38380 631
1ae4518d
DC
632 /* coding mode 0 is the VLC scheme; 1 is the fixed code scheme */
633 coding_mode = get_bits1(gb);
d86053a4 634
1ae4518d
DC
635 /* iterate through all of the macroblocks that contain 1 or more
636 * coded fragments */
19cd517d
DC
637 for (sb_y = 0; sb_y < s->y_superblock_height; sb_y++) {
638 for (sb_x = 0; sb_x < s->y_superblock_width; sb_x++) {
d86053a4 639
1ae4518d 640 for (j = 0; j < 4; j++) {
19cd517d
DC
641 int mb_x = 2*sb_x + (j>>1);
642 int mb_y = 2*sb_y + (((j>>1)+j)&1);
643 current_macroblock = mb_y * s->macroblock_width + mb_x;
644
645 if (mb_x >= s->macroblock_width || mb_y >= s->macroblock_height ||
1ae4518d
DC
646 (s->macroblock_coding[current_macroblock] == MODE_COPY))
647 continue;
d86053a4 648
1ae4518d
DC
649 switch (s->macroblock_coding[current_macroblock]) {
650
651 case MODE_INTER_PLUS_MV:
652 case MODE_GOLDEN_MV:
653 /* all 6 fragments use the same motion vector */
654 if (coding_mode == 0) {
655 motion_x[0] = motion_vector_table[get_vlc2(gb, s->motion_vector_vlc.table, 6, 2)];
656 motion_y[0] = motion_vector_table[get_vlc2(gb, s->motion_vector_vlc.table, 6, 2)];
657 } else {
658 motion_x[0] = fixed_motion_vector_table[get_bits(gb, 6)];
659 motion_y[0] = fixed_motion_vector_table[get_bits(gb, 6)];
892fc83e 660 }
7f9926a4 661
1ae4518d
DC
662 /* vector maintenance, only on MODE_INTER_PLUS_MV */
663 if (s->macroblock_coding[current_macroblock] ==
664 MODE_INTER_PLUS_MV) {
e32e2d56
AJ
665 prior_last_motion_x = last_motion_x;
666 prior_last_motion_y = last_motion_y;
1ae4518d
DC
667 last_motion_x = motion_x[0];
668 last_motion_y = motion_y[0];
669 }
670 break;
671
672 case MODE_INTER_FOURMV:
673 /* vector maintenance */
674 prior_last_motion_x = last_motion_x;
675 prior_last_motion_y = last_motion_y;
676
677 /* fetch 4 vectors from the bitstream, one for each
678 * Y fragment, then average for the C fragment vectors */
1ae4518d 679 for (k = 0; k < 4; k++) {
57783884 680 current_fragment = BLOCK_Y*s->fragment_width[0] + BLOCK_X;
eb691ef2 681 if (s->all_fragments[current_fragment].coding_method != MODE_COPY) {
1ae4518d
DC
682 if (coding_mode == 0) {
683 motion_x[k] = motion_vector_table[get_vlc2(gb, s->motion_vector_vlc.table, 6, 2)];
684 motion_y[k] = motion_vector_table[get_vlc2(gb, s->motion_vector_vlc.table, 6, 2)];
feaf1a73 685 } else {
1ae4518d
DC
686 motion_x[k] = fixed_motion_vector_table[get_bits(gb, 6)];
687 motion_y[k] = fixed_motion_vector_table[get_bits(gb, 6)];
feaf1a73 688 }
1ae4518d
DC
689 last_motion_x = motion_x[k];
690 last_motion_y = motion_y[k];
691 } else {
692 motion_x[k] = 0;
693 motion_y[k] = 0;
d86053a4 694 }
1ae4518d 695 }
1ae4518d
DC
696 break;
697
698 case MODE_INTER_LAST_MV:
699 /* all 6 fragments use the last motion vector */
700 motion_x[0] = last_motion_x;
701 motion_y[0] = last_motion_y;
d86053a4 702
1ae4518d
DC
703 /* no vector maintenance (last vector remains the
704 * last vector) */
705 break;
706
707 case MODE_INTER_PRIOR_LAST:
708 /* all 6 fragments use the motion vector prior to the
709 * last motion vector */
710 motion_x[0] = prior_last_motion_x;
711 motion_y[0] = prior_last_motion_y;
d86053a4 712
1ae4518d
DC
713 /* vector maintenance */
714 prior_last_motion_x = last_motion_x;
715 prior_last_motion_y = last_motion_y;
716 last_motion_x = motion_x[0];
717 last_motion_y = motion_y[0];
718 break;
44ae98dd 719
1ae4518d
DC
720 default:
721 /* covers intra, inter without MV, golden without MV */
e6e32bdc
MM
722 motion_x[0] = 0;
723 motion_y[0] = 0;
44ae98dd 724
1ae4518d
DC
725 /* no vector maintenance */
726 break;
727 }
d86053a4 728
1ae4518d 729 /* assign the motion vectors to the correct fragments */
ea676144 730 for (k = 0; k < 4; k++) {
1ae4518d 731 current_fragment =
57783884 732 BLOCK_Y*s->fragment_width[0] + BLOCK_X;
e6e32bdc 733 if (s->macroblock_coding[current_macroblock] == MODE_INTER_FOURMV) {
da8af938
MM
734 s->all_fragments[current_fragment].motion_x = motion_x[k];
735 s->all_fragments[current_fragment].motion_y = motion_y[k];
e6e32bdc
MM
736 } else {
737 s->all_fragments[current_fragment].motion_x = motion_x[0];
738 s->all_fragments[current_fragment].motion_y = motion_y[0];
739 }
d86053a4 740 }
1e76a1da
DC
741
742#define SET_CHROMA_MV(mx, my) \
743 frag[s->fragment_start[1]].motion_x = mx; \
744 frag[s->fragment_start[1]].motion_y = my; \
745 frag[s->fragment_start[2]].motion_x = mx; \
746 frag[s->fragment_start[2]].motion_y = my
747
748 if (s->chroma_y_shift) {
1c183aa4
DC
749 if (s->macroblock_coding[current_macroblock] == MODE_INTER_FOURMV) {
750 motion_x[0] = RSHIFT(motion_x[0] + motion_x[1] + motion_x[2] + motion_x[3], 2);
751 motion_y[0] = RSHIFT(motion_y[0] + motion_y[1] + motion_y[2] + motion_y[3], 2);
752 }
1e76a1da
DC
753 motion_x[0] = (motion_x[0]>>1) | (motion_x[0]&1);
754 motion_y[0] = (motion_y[0]>>1) | (motion_y[0]&1);
755 frag = s->all_fragments + mb_y*s->fragment_width[1] + mb_x;
756 SET_CHROMA_MV(motion_x[0], motion_y[0]);
757 } else if (s->chroma_x_shift) {
758 if (s->macroblock_coding[current_macroblock] == MODE_INTER_FOURMV) {
759 motion_x[0] = RSHIFT(motion_x[0] + motion_x[1], 1);
760 motion_y[0] = RSHIFT(motion_y[0] + motion_y[1], 1);
761 motion_x[1] = RSHIFT(motion_x[2] + motion_x[3], 1);
762 motion_y[1] = RSHIFT(motion_y[2] + motion_y[3], 1);
763 } else {
764 motion_x[1] = motion_x[0];
765 motion_y[1] = motion_y[0];
766 }
767 motion_x[0] = (motion_x[0]>>1) | (motion_x[0]&1);
768 motion_x[1] = (motion_x[1]>>1) | (motion_x[1]&1);
769
770 frag = s->all_fragments + 2*mb_y*s->fragment_width[1] + mb_x;
771 for (k = 0; k < 2; k++) {
772 SET_CHROMA_MV(motion_x[k], motion_y[k]);
773 frag += s->fragment_width[1];
774 }
775 } else {
776 for (k = 0; k < 4; k++) {
777 frag = s->all_fragments + BLOCK_Y*s->fragment_width[1] + BLOCK_X;
778 if (s->macroblock_coding[current_macroblock] == MODE_INTER_FOURMV) {
779 SET_CHROMA_MV(motion_x[k], motion_y[k]);
780 } else {
781 SET_CHROMA_MV(motion_x[0], motion_y[0]);
782 }
783 }
ea676144 784 }
d86053a4 785 }
19cd517d 786 }
1ae4518d 787 }
892fc83e
MM
788
789 return 0;
d86053a4
MM
790}
791
f2264fa5
DC
792static int unpack_block_qpis(Vp3DecodeContext *s, GetBitContext *gb)
793{
794 int qpi, i, j, bit, run_length, blocks_decoded, num_blocks_at_qpi;
c72625f2 795 int num_blocks = s->total_num_coded_frags;
f2264fa5
DC
796
797 for (qpi = 0; qpi < s->nqps-1 && num_blocks > 0; qpi++) {
798 i = blocks_decoded = num_blocks_at_qpi = 0;
799
800 bit = get_bits1(gb);
801
802 do {
803 run_length = get_vlc2(gb, s->superblock_run_length_vlc.table, 6, 2) + 1;
804 if (run_length == 34)
805 run_length += get_bits(gb, 12);
806 blocks_decoded += run_length;
807
808 if (!bit)
809 num_blocks_at_qpi += run_length;
810
811 for (j = 0; j < run_length; i++) {
c72625f2 812 if (i >= s->total_num_coded_frags)
f2264fa5
DC
813 return -1;
814
c72625f2
DC
815 if (s->all_fragments[s->coded_fragment_list[0][i]].qpi == qpi) {
816 s->all_fragments[s->coded_fragment_list[0][i]].qpi += bit;
f2264fa5
DC
817 j++;
818 }
819 }
820
ecb51b25 821 if (run_length == MAXIMUM_LONG_BIT_RUN)
f2264fa5
DC
822 bit = get_bits1(gb);
823 else
824 bit ^= 1;
825 } while (blocks_decoded < num_blocks);
826
827 num_blocks -= num_blocks_at_qpi;
828 }
829
830 return 0;
831}
832
115329f1 833/*
d86053a4
MM
834 * This function is called by unpack_dct_coeffs() to extract the VLCs from
835 * the bitstream. The VLCs encode tokens which are used to unpack DCT
836 * data. This function unpacks all the VLCs for either the Y plane or both
837 * C planes, and is called for DC coefficients or different AC coefficient
838 * levels (since different coefficient types require different VLC tables.
839 *
840 * This function returns a residual eob run. E.g, if a particular token gave
841 * instructions to EOB the next 5 fragments and there were only 2 fragments
842 * left in the current fragment range, 3 would be returned so that it could
843 * be passed into the next call to this same function.
844 */
845static int unpack_vlcs(Vp3DecodeContext *s, GetBitContext *gb,
846 VLC *table, int coeff_index,
c72625f2 847 int plane,
d86053a4
MM
848 int eob_run)
849{
c72625f2 850 int i, j = 0;
d86053a4 851 int token;
d3076955
MM
852 int zero_run = 0;
853 DCTELEM coeff = 0;
d3076955 854 int bits_to_get;
c72625f2
DC
855 int blocks_ended;
856 int coeff_i = 0;
857 int num_coeffs = s->num_coded_frags[plane][coeff_index];
858 int16_t *dct_tokens = s->dct_tokens[plane][coeff_index];
d86053a4 859
ee3d7f58 860 /* local references to structure members to avoid repeated deferences */
c72625f2 861 int *coded_fragment_list = s->coded_fragment_list[plane];
ee3d7f58 862 Vp3Fragment *all_fragments = s->all_fragments;
ee3d7f58
MM
863 VLC_TYPE (*vlc_table)[2] = table->table;
864
c72625f2
DC
865 if (num_coeffs < 0)
866 av_log(s->avctx, AV_LOG_ERROR, "Invalid number of coefficents at level %d\n", coeff_index);
867
868 if (eob_run > num_coeffs) {
869 coeff_i = blocks_ended = num_coeffs;
870 eob_run -= num_coeffs;
098523eb 871 } else {
c72625f2
DC
872 coeff_i = blocks_ended = eob_run;
873 eob_run = 0;
74c0ac12
MM
874 }
875
c72625f2
DC
876 // insert fake EOB token to cover the split between planes or zzi
877 if (blocks_ended)
878 dct_tokens[j++] = blocks_ended << 2;
d86053a4 879
f50dafa8 880 while (coeff_i < num_coeffs && get_bits_left(gb) > 0) {
d86053a4 881 /* decode a VLC into a token */
ee3d7f58 882 token = get_vlc2(gb, vlc_table, 5, 3);
d86053a4 883 /* use the token to get a zero run, a coefficient, and an eob run */
d3076955
MM
884 if (token <= 6) {
885 eob_run = eob_run_base[token];
886 if (eob_run_get_bits[token])
887 eob_run += get_bits(gb, eob_run_get_bits[token]);
c72625f2
DC
888
889 // record only the number of blocks ended in this plane,
890 // any spill will be recorded in the next plane.
891 if (eob_run > num_coeffs - coeff_i) {
892 dct_tokens[j++] = TOKEN_EOB(num_coeffs - coeff_i);
893 blocks_ended += num_coeffs - coeff_i;
894 eob_run -= num_coeffs - coeff_i;
895 coeff_i = num_coeffs;
896 } else {
897 dct_tokens[j++] = TOKEN_EOB(eob_run);
898 blocks_ended += eob_run;
899 coeff_i += eob_run;
900 eob_run = 0;
901 }
d3076955
MM
902 } else {
903 bits_to_get = coeff_get_bits[token];
428984b0
MM
904 if (bits_to_get)
905 bits_to_get = get_bits(gb, bits_to_get);
906 coeff = coeff_tables[token][bits_to_get];
d3076955
MM
907
908 zero_run = zero_run_base[token];
909 if (zero_run_get_bits[token])
910 zero_run += get_bits(gb, zero_run_get_bits[token]);
d86053a4 911
c72625f2
DC
912 if (zero_run) {
913 dct_tokens[j++] = TOKEN_ZERO_RUN(coeff, zero_run);
914 } else {
915 // Save DC into the fragment structure. DC prediction is
916 // done in raster order, so the actual DC can't be in with
917 // other tokens. We still need the token in dct_tokens[]
918 // however, or else the structure collapses on itself.
919 if (!coeff_index)
920 all_fragments[coded_fragment_list[coeff_i]].dc = coeff;
921
922 dct_tokens[j++] = TOKEN_COEFF(coeff);
923 }
924
925 if (coeff_index + zero_run > 64) {
01f9640b 926 av_log(s->avctx, AV_LOG_DEBUG, "Invalid zero run of %d with"
c72625f2
DC
927 " %d coeffs left\n", zero_run, 64-coeff_index);
928 zero_run = 64 - coeff_index;
929 }
098523eb 930
c72625f2
DC
931 // zero runs code multiple coefficients,
932 // so don't try to decode coeffs for those higher levels
933 for (i = coeff_index+1; i <= coeff_index+zero_run; i++)
934 s->num_coded_frags[plane][i]--;
935 coeff_i++;
936 }
d86053a4
MM
937 }
938
c72625f2
DC
939 if (blocks_ended > s->num_coded_frags[plane][coeff_index])
940 av_log(s->avctx, AV_LOG_ERROR, "More blocks ended than coded!\n");
941
942 // decrement the number of blocks that have higher coeffecients for each
943 // EOB run at this level
944 if (blocks_ended)
945 for (i = coeff_index+1; i < 64; i++)
946 s->num_coded_frags[plane][i] -= blocks_ended;
947
948 // setup the next buffer
949 if (plane < 2)
950 s->dct_tokens[plane+1][coeff_index] = dct_tokens + j;
951 else if (coeff_index < 63)
952 s->dct_tokens[0][coeff_index+1] = dct_tokens + j;
953
d86053a4
MM
954 return eob_run;
955}
956
138fe832
MM
957static void reverse_dc_prediction(Vp3DecodeContext *s,
958 int first_fragment,
959 int fragment_width,
960 int fragment_height);
d86053a4
MM
961/*
962 * This function unpacks all of the DCT coefficient data from the
963 * bitstream.
964 */
892fc83e 965static int unpack_dct_coeffs(Vp3DecodeContext *s, GetBitContext *gb)
d86053a4
MM
966{
967 int i;
968 int dc_y_table;
969 int dc_c_table;
970 int ac_y_table;
971 int ac_c_table;
972 int residual_eob_run = 0;
9d8bb031
MM
973 VLC *y_tables[64];
974 VLC *c_tables[64];
d86053a4 975
c72625f2
DC
976 s->dct_tokens[0][0] = s->dct_tokens_base;
977
f4433de9 978 /* fetch the DC table indexes */
d86053a4
MM
979 dc_y_table = get_bits(gb, 4);
980 dc_c_table = get_bits(gb, 4);
981
982 /* unpack the Y plane DC coefficients */
115329f1 983 residual_eob_run = unpack_vlcs(s, gb, &s->dc_vlc[dc_y_table], 0,
c72625f2 984 0, residual_eob_run);
d86053a4 985
138fe832 986 /* reverse prediction of the Y-plane DC coefficients */
57783884 987 reverse_dc_prediction(s, 0, s->fragment_width[0], s->fragment_height[0]);
138fe832 988
d86053a4 989 /* unpack the C plane DC coefficients */
d86053a4 990 residual_eob_run = unpack_vlcs(s, gb, &s->dc_vlc[dc_c_table], 0,
c72625f2
DC
991 1, residual_eob_run);
992 residual_eob_run = unpack_vlcs(s, gb, &s->dc_vlc[dc_c_table], 0,
993 2, residual_eob_run);
d86053a4 994
138fe832
MM
995 /* reverse prediction of the C-plane DC coefficients */
996 if (!(s->avctx->flags & CODEC_FLAG_GRAY))
997 {
998 reverse_dc_prediction(s, s->fragment_start[1],
57783884 999 s->fragment_width[1], s->fragment_height[1]);
138fe832 1000 reverse_dc_prediction(s, s->fragment_start[2],
57783884 1001 s->fragment_width[1], s->fragment_height[1]);
138fe832
MM
1002 }
1003
f4433de9 1004 /* fetch the AC table indexes */
d86053a4
MM
1005 ac_y_table = get_bits(gb, 4);
1006 ac_c_table = get_bits(gb, 4);
1007
9d8bb031 1008 /* build tables of AC VLC tables */
d86053a4 1009 for (i = 1; i <= 5; i++) {
9d8bb031
MM
1010 y_tables[i] = &s->ac_vlc_1[ac_y_table];
1011 c_tables[i] = &s->ac_vlc_1[ac_c_table];
d86053a4 1012 }
d86053a4 1013 for (i = 6; i <= 14; i++) {
9d8bb031
MM
1014 y_tables[i] = &s->ac_vlc_2[ac_y_table];
1015 c_tables[i] = &s->ac_vlc_2[ac_c_table];
d86053a4 1016 }
d86053a4 1017 for (i = 15; i <= 27; i++) {
9d8bb031
MM
1018 y_tables[i] = &s->ac_vlc_3[ac_y_table];
1019 c_tables[i] = &s->ac_vlc_3[ac_c_table];
d86053a4 1020 }
d86053a4 1021 for (i = 28; i <= 63; i++) {
9d8bb031
MM
1022 y_tables[i] = &s->ac_vlc_4[ac_y_table];
1023 c_tables[i] = &s->ac_vlc_4[ac_c_table];
1024 }
1025
1026 /* decode all AC coefficents */
1027 for (i = 1; i <= 63; i++) {
9d8bb031 1028 residual_eob_run = unpack_vlcs(s, gb, y_tables[i], i,
c72625f2 1029 0, residual_eob_run);
d86053a4 1030
9d8bb031 1031 residual_eob_run = unpack_vlcs(s, gb, c_tables[i], i,
c72625f2
DC
1032 1, residual_eob_run);
1033 residual_eob_run = unpack_vlcs(s, gb, c_tables[i], i,
1034 2, residual_eob_run);
d86053a4 1035 }
892fc83e
MM
1036
1037 return 0;
d86053a4
MM
1038}
1039
1040/*
1041 * This function reverses the DC prediction for each coded fragment in
115329f1 1042 * the frame. Much of this function is adapted directly from the original
d86053a4
MM
1043 * VP3 source code.
1044 */
1045#define COMPATIBLE_FRAME(x) \
1046 (compatible_frame[s->all_fragments[x].coding_method] == current_frame_type)
c72625f2 1047#define DC_COEFF(u) s->all_fragments[u].dc
d86053a4
MM
1048
1049static void reverse_dc_prediction(Vp3DecodeContext *s,
1050 int first_fragment,
1051 int fragment_width,
115329f1 1052 int fragment_height)
d86053a4
MM
1053{
1054
1055#define PUL 8
1056#define PU 4
1057#define PUR 2
1058#define PL 1
1059
1060 int x, y;
1061 int i = first_fragment;
1062
59ef342b 1063 int predicted_dc;
d86053a4 1064
d86053a4
MM
1065 /* DC values for the left, up-left, up, and up-right fragments */
1066 int vl, vul, vu, vur;
1067
f4433de9 1068 /* indexes for the left, up-left, up, and up-right fragments */
d86053a4
MM
1069 int l, ul, u, ur;
1070
115329f1 1071 /*
d86053a4
MM
1072 * The 6 fields mean:
1073 * 0: up-left multiplier
1074 * 1: up multiplier
1075 * 2: up-right multiplier
1076 * 3: left multiplier
d86053a4 1077 */
bb991087 1078 static const int predictor_transform[16][4] = {
006ff1ca
MN
1079 { 0, 0, 0, 0},
1080 { 0, 0, 0,128}, // PL
1081 { 0, 0,128, 0}, // PUR
1082 { 0, 0, 53, 75}, // PUR|PL
1083 { 0,128, 0, 0}, // PU
1084 { 0, 64, 0, 64}, // PU|PL
1085 { 0,128, 0, 0}, // PU|PUR
1086 { 0, 0, 53, 75}, // PU|PUR|PL
1087 {128, 0, 0, 0}, // PUL
1088 { 0, 0, 0,128}, // PUL|PL
1089 { 64, 0, 64, 0}, // PUL|PUR
1090 { 0, 0, 53, 75}, // PUL|PUR|PL
1091 { 0,128, 0, 0}, // PUL|PU
1092 {-104,116, 0,116}, // PUL|PU|PL
1093 { 24, 80, 24, 0}, // PUL|PU|PUR
1094 {-104,116, 0,116} // PUL|PU|PUR|PL
d86053a4
MM
1095 };
1096
1097 /* This table shows which types of blocks can use other blocks for
1098 * prediction. For example, INTRA is the only mode in this table to
1099 * have a frame number of 0. That means INTRA blocks can only predict
115329f1 1100 * from other INTRA blocks. There are 2 golden frame coding types;
d86053a4
MM
1101 * blocks encoding in these modes can only predict from other blocks
1102 * that were encoded with these 1 of these 2 modes. */
50ba3fd7 1103 static const unsigned char compatible_frame[9] = {
d86053a4
MM
1104 1, /* MODE_INTER_NO_MV */
1105 0, /* MODE_INTRA */
1106 1, /* MODE_INTER_PLUS_MV */
1107 1, /* MODE_INTER_LAST_MV */
1108 1, /* MODE_INTER_PRIOR_MV */
1109 2, /* MODE_USING_GOLDEN */
1110 2, /* MODE_GOLDEN_MV */
50ba3fd7
JGG
1111 1, /* MODE_INTER_FOUR_MV */
1112 3 /* MODE_COPY */
d86053a4
MM
1113 };
1114 int current_frame_type;
1115
1116 /* there is a last DC predictor for each of the 3 frame types */
1117 short last_dc[3];
1118
1119 int transform = 0;
1120
d86053a4
MM
1121 vul = vu = vur = vl = 0;
1122 last_dc[0] = last_dc[1] = last_dc[2] = 0;
1123
1124 /* for each fragment row... */
1125 for (y = 0; y < fragment_height; y++) {
1126
1127 /* for each fragment in a row... */
1128 for (x = 0; x < fragment_width; x++, i++) {
1129
1130 /* reverse prediction if this block was coded */
1131 if (s->all_fragments[i].coding_method != MODE_COPY) {
1132
115329f1 1133 current_frame_type =
d86053a4 1134 compatible_frame[s->all_fragments[i].coding_method];
d86053a4 1135
f72f8a77
MN
1136 transform= 0;
1137 if(x){
1138 l= i-1;
7beddb12 1139 vl = DC_COEFF(l);
50ba3fd7 1140 if(COMPATIBLE_FRAME(l))
006ff1ca 1141 transform |= PL;
f72f8a77
MN
1142 }
1143 if(y){
1144 u= i-fragment_width;
7beddb12 1145 vu = DC_COEFF(u);
50ba3fd7 1146 if(COMPATIBLE_FRAME(u))
006ff1ca 1147 transform |= PU;
f72f8a77
MN
1148 if(x){
1149 ul= i-fragment_width-1;
1150 vul = DC_COEFF(ul);
50ba3fd7 1151 if(COMPATIBLE_FRAME(ul))
006ff1ca 1152 transform |= PUL;
f72f8a77
MN
1153 }
1154 if(x + 1 < fragment_width){
1155 ur= i-fragment_width+1;
1156 vur = DC_COEFF(ur);
50ba3fd7 1157 if(COMPATIBLE_FRAME(ur))
006ff1ca 1158 transform |= PUR;
f72f8a77 1159 }
d86053a4
MM
1160 }
1161
d86053a4
MM
1162 if (transform == 0) {
1163
1164 /* if there were no fragments to predict from, use last
1165 * DC saved */
7beddb12 1166 predicted_dc = last_dc[current_frame_type];
d86053a4
MM
1167 } else {
1168
1169 /* apply the appropriate predictor transform */
1170 predicted_dc =
1171 (predictor_transform[transform][0] * vul) +
1172 (predictor_transform[transform][1] * vu) +
1173 (predictor_transform[transform][2] * vur) +
1174 (predictor_transform[transform][3] * vl);
1175
684d9e36 1176 predicted_dc /= 128;
d86053a4
MM
1177
1178 /* check for outranging on the [ul u l] and
1179 * [ul u ur l] predictors */
c11cb375 1180 if ((transform == 15) || (transform == 13)) {
c26abfa5 1181 if (FFABS(predicted_dc - vu) > 128)
d86053a4 1182 predicted_dc = vu;
c26abfa5 1183 else if (FFABS(predicted_dc - vl) > 128)
d86053a4 1184 predicted_dc = vl;
c26abfa5 1185 else if (FFABS(predicted_dc - vul) > 128)
d86053a4
MM
1186 predicted_dc = vul;
1187 }
d86053a4
MM
1188 }
1189
7beddb12 1190 /* at long last, apply the predictor */
c72625f2 1191 DC_COEFF(i) += predicted_dc;
d86053a4 1192 /* save the DC */
7beddb12 1193 last_dc[current_frame_type] = DC_COEFF(i);
d86053a4
MM
1194 }
1195 }
1196 }
1197}
1198
256c0662 1199static void apply_loop_filter(Vp3DecodeContext *s, int plane, int ystart, int yend)
fe313556 1200{
fe313556
DC
1201 int x, y;
1202 int *bounding_values= s->bounding_values_array+127;
1203
57783884
DC
1204 int width = s->fragment_width[!!plane];
1205 int height = s->fragment_height[!!plane];
621f9a40
DC
1206 int fragment = s->fragment_start [plane] + ystart * width;
1207 int stride = s->current_frame.linesize[plane];
1208 uint8_t *plane_data = s->current_frame.data [plane];
1209 if (!s->flipped_image) stride = -stride;
735acf56 1210 plane_data += s->data_offset[plane] + 8*ystart*stride;
621f9a40
DC
1211
1212 for (y = ystart; y < yend; y++) {
1213
1214 for (x = 0; x < width; x++) {
1215 /* This code basically just deblocks on the edges of coded blocks.
1216 * However, it has to be much more complicated because of the
1217 * braindamaged deblock ordering used in VP3/Theora. Order matters
1218 * because some pixels get filtered twice. */
1219 if( s->all_fragments[fragment].coding_method != MODE_COPY )
1220 {
1221 /* do not perform left edge filter for left columns frags */
1222 if (x > 0) {
1223 s->dsp.vp3_h_loop_filter(
735acf56 1224 plane_data + 8*x,
621f9a40
DC
1225 stride, bounding_values);
1226 }
fe313556 1227
621f9a40
DC
1228 /* do not perform top edge filter for top row fragments */
1229 if (y > 0) {
1230 s->dsp.vp3_v_loop_filter(
735acf56 1231 plane_data + 8*x,
621f9a40
DC
1232 stride, bounding_values);
1233 }
fe313556 1234
621f9a40
DC
1235 /* do not perform right edge filter for right column
1236 * fragments or if right fragment neighbor is also coded
1237 * in this frame (it will be filtered in next iteration) */
1238 if ((x < width - 1) &&
1239 (s->all_fragments[fragment + 1].coding_method == MODE_COPY)) {
1240 s->dsp.vp3_h_loop_filter(
735acf56 1241 plane_data + 8*x + 8,
621f9a40 1242 stride, bounding_values);
fe313556
DC
1243 }
1244
621f9a40
DC
1245 /* do not perform bottom edge filter for bottom row
1246 * fragments or if bottom fragment neighbor is also coded
1247 * in this frame (it will be filtered in the next row) */
1248 if ((y < height - 1) &&
1249 (s->all_fragments[fragment + width].coding_method == MODE_COPY)) {
1250 s->dsp.vp3_v_loop_filter(
735acf56 1251 plane_data + 8*x + 8*stride,
621f9a40
DC
1252 stride, bounding_values);
1253 }
fe313556 1254 }
621f9a40
DC
1255
1256 fragment++;
fe313556 1257 }
735acf56 1258 plane_data += 8*stride;
621f9a40 1259 }
fe313556
DC
1260}
1261
a8de3901 1262/**
c72625f2
DC
1263 * Pulls DCT tokens from the 64 levels to decode and dequant the coefficients
1264 * for the next block in coding order
1265 */
1266static inline int vp3_dequant(Vp3DecodeContext *s, Vp3Fragment *frag,
1267 int plane, int inter, DCTELEM block[64])
1268{
1269 int16_t *dequantizer = s->qmat[frag->qpi][inter][plane];
1270 uint8_t *perm = s->scantable.permutated;
1271 int i = 0;
1272
1273 do {
1274 int token = *s->dct_tokens[plane][i];
1275 switch (token & 3) {
1276 case 0: // EOB
1277 if (--token < 4) // 0-3 are token types, so the EOB run must now be 0
1278 s->dct_tokens[plane][i]++;
1279 else
1280 *s->dct_tokens[plane][i] = token & ~3;
1281 goto end;
1282 case 1: // zero run
1283 s->dct_tokens[plane][i]++;
1284 i += (token >> 2) & 0x7f;
1285 block[perm[i]] = (token >> 9) * dequantizer[perm[i]];
1286 i++;
1287 break;
1288 case 2: // coeff
1289 block[perm[i]] = (token >> 2) * dequantizer[perm[i]];
1290 s->dct_tokens[plane][i++]++;
1291 break;
1292 default:
1293 av_log(s->avctx, AV_LOG_ERROR, "internal: invalid token type\n");
1294 return i;
1295 }
1296 } while (i < 64);
1297end:
1298 // the actual DC+prediction is in the fragment structure
1299 block[0] = frag->dc * s->qmat[0][inter][plane][0];
1300 return i;
1301}
1302
1303/**
a8de3901
DC
1304 * called when all pixels up to row y are complete
1305 */
1306static void vp3_draw_horiz_band(Vp3DecodeContext *s, int y)
1307{
1308 int h, cy;
1309 int offset[4];
1310
1311 if(s->avctx->draw_horiz_band==NULL)
1312 return;
1313
1314 h= y - s->last_slice_end;
1315 y -= h;
1316
1317 if (!s->flipped_image) {
1318 if (y == 0)
1319 h -= s->height - s->avctx->height; // account for non-mod16
1320 y = s->height - y - h;
1321 }
1322
1323 cy = y >> 1;
1324 offset[0] = s->current_frame.linesize[0]*y;
1325 offset[1] = s->current_frame.linesize[1]*cy;
1326 offset[2] = s->current_frame.linesize[2]*cy;
1327 offset[3] = 0;
1328
1329 emms_c();
1330 s->avctx->draw_horiz_band(s->avctx, &s->current_frame, offset, y, 3, h);
1331 s->last_slice_end= y + h;
1332}
1333
d86053a4 1334/*
dc4b78d9 1335 * Perform the final rendering for a particular slice of data.
7a095ea6 1336 * The slice number ranges from 0..(c_superblock_height - 1).
dc4b78d9
MM
1337 */
1338static void render_slice(Vp3DecodeContext *s, int slice)
1339{
7a095ea6 1340 int x, y, i, j;
40d11227 1341 LOCAL_ALIGNED_16(DCTELEM, block, [64]);
dc4b78d9 1342 int motion_x = 0xdeadbeef, motion_y = 0xdeadbeef;
dc4b78d9
MM
1343 int motion_halfpel_index;
1344 uint8_t *motion_source;
7a095ea6 1345 int plane, first_pixel;
dc4b78d9 1346
7a095ea6 1347 if (slice >= s->c_superblock_height)
dc4b78d9
MM
1348 return;
1349
1350 for (plane = 0; plane < 3; plane++) {
735acf56
DC
1351 uint8_t *output_plane = s->current_frame.data [plane] + s->data_offset[plane];
1352 uint8_t * last_plane = s-> last_frame.data [plane] + s->data_offset[plane];
1353 uint8_t *golden_plane = s-> golden_frame.data [plane] + s->data_offset[plane];
1abbf64e 1354 int stride = s->current_frame.linesize[plane];
1e76a1da
DC
1355 int plane_width = s->width >> (plane && s->chroma_x_shift);
1356 int plane_height = s->height >> (plane && s->chroma_y_shift);
7a095ea6 1357
1e76a1da
DC
1358 int sb_x, sb_y = slice << (!plane && s->chroma_y_shift);
1359 int slice_height = sb_y + 1 + (!plane && s->chroma_y_shift);
7a095ea6
DC
1360 int slice_width = plane ? s->c_superblock_width : s->y_superblock_width;
1361
57783884
DC
1362 int fragment_width = s->fragment_width[!!plane];
1363 int fragment_height = s->fragment_height[!!plane];
7a095ea6 1364 int fragment_start = s->fragment_start[plane];
1abbf64e
MN
1365
1366 if (!s->flipped_image) stride = -stride;
161e8cf4
DC
1367 if (CONFIG_GRAY && plane && (s->avctx->flags & CODEC_FLAG_GRAY))
1368 continue;
dc4b78d9 1369
115329f1 1370
c26abfa5 1371 if(FFABS(stride) > 2048)
dc4b78d9
MM
1372 return; //various tables are fixed size
1373
7a095ea6
DC
1374 /* for each superblock row in the slice (both of them)... */
1375 for (; sb_y < slice_height; sb_y++) {
dc4b78d9 1376
7a095ea6
DC
1377 /* for each superblock in a row... */
1378 for (sb_x = 0; sb_x < slice_width; sb_x++) {
dc4b78d9 1379
7a095ea6
DC
1380 /* for each block in a superblock... */
1381 for (j = 0; j < 16; j++) {
1382 x = 4*sb_x + hilbert_offset[j][0];
1383 y = 4*sb_y + hilbert_offset[j][1];
1384
1385 i = fragment_start + y*fragment_width + x;
1386
1387 // bounds check
1388 if (x >= fragment_width || y >= fragment_height)
1389 continue;
1390
1391 first_pixel = 8*y*stride + 8*x;
dc4b78d9
MM
1392
1393 /* transform if this block was coded */
161e8cf4 1394 if (s->all_fragments[i].coding_method != MODE_COPY) {
c72625f2 1395 int intra = s->all_fragments[i].coding_method == MODE_INTRA;
dc4b78d9
MM
1396
1397 if ((s->all_fragments[i].coding_method == MODE_USING_GOLDEN) ||
1398 (s->all_fragments[i].coding_method == MODE_GOLDEN_MV))
1399 motion_source= golden_plane;
115329f1 1400 else
dc4b78d9
MM
1401 motion_source= last_plane;
1402
735acf56 1403 motion_source += first_pixel;
dc4b78d9
MM
1404 motion_halfpel_index = 0;
1405
1406 /* sort out the motion vector if this fragment is coded
1407 * using a motion vector method */
1408 if ((s->all_fragments[i].coding_method > MODE_INTRA) &&
1409 (s->all_fragments[i].coding_method != MODE_USING_GOLDEN)) {
1410 int src_x, src_y;
1411 motion_x = s->all_fragments[i].motion_x;
1412 motion_y = s->all_fragments[i].motion_y;
dc4b78d9 1413
7a095ea6
DC
1414 src_x= (motion_x>>1) + 8*x;
1415 src_y= (motion_y>>1) + 8*y;
dc4b78d9
MM
1416
1417 motion_halfpel_index = motion_x & 0x01;
1418 motion_source += (motion_x >> 1);
1419
1420 motion_halfpel_index |= (motion_y & 0x01) << 1;
1421 motion_source += ((motion_y >> 1) * stride);
1422
1423 if(src_x<0 || src_y<0 || src_x + 9 >= plane_width || src_y + 9 >= plane_height){
1424 uint8_t *temp= s->edge_emu_buffer;
1425 if(stride<0) temp -= 9*stride;
1426 else temp += 9*stride;
1427
1428 ff_emulated_edge_mc(temp, motion_source, stride, 9, 9, src_x, src_y, plane_width, plane_height);
1429 motion_source= temp;
1430 }
1431 }
115329f1 1432
dc4b78d9
MM
1433
1434 /* first, take care of copying a block from either the
1435 * previous or the golden frame */
1436 if (s->all_fragments[i].coding_method != MODE_INTRA) {
115329f1
DB
1437 /* Note, it is possible to implement all MC cases with
1438 put_no_rnd_pixels_l2 which would look more like the
1439 VP3 source but this would be slower as
dc4b78d9
MM
1440 put_no_rnd_pixels_tab is better optimzed */
1441 if(motion_halfpel_index != 3){
1442 s->dsp.put_no_rnd_pixels_tab[1][motion_halfpel_index](
735acf56 1443 output_plane + first_pixel,
dc4b78d9
MM
1444 motion_source, stride, 8);
1445 }else{
1446 int d= (motion_x ^ motion_y)>>31; // d is 0 if motion_x and _y have the same sign, else -1
1447 s->dsp.put_no_rnd_pixels_l2[1](
735acf56 1448 output_plane + first_pixel,
115329f1
DB
1449 motion_source - d,
1450 motion_source + stride + 1 + d,
dc4b78d9
MM
1451 stride, 8);
1452 }
dc4b78d9
MM
1453 }
1454
5fecfb7d 1455 s->dsp.clear_block(block);
c72625f2 1456 vp3_dequant(s, s->all_fragments + i, plane, !intra, block);
dc4b78d9
MM
1457
1458 /* invert DCT and place (or add) in final output */
115329f1 1459
dc4b78d9
MM
1460 if (s->all_fragments[i].coding_method == MODE_INTRA) {
1461 if(s->avctx->idct_algo!=FF_IDCT_VP3)
1462 block[0] += 128<<3;
1463 s->dsp.idct_put(
735acf56 1464 output_plane + first_pixel,
dc4b78d9
MM
1465 stride,
1466 block);
1467 } else {
1468 s->dsp.idct_add(
735acf56 1469 output_plane + first_pixel,
dc4b78d9
MM
1470 stride,
1471 block);
1472 }
dc4b78d9
MM
1473 } else {
1474
1475 /* copy directly from the previous frame */
1476 s->dsp.put_pixels_tab[1][0](
735acf56
DC
1477 output_plane + first_pixel,
1478 last_plane + first_pixel,
dc4b78d9
MM
1479 stride, 8);
1480
1481 }
7a095ea6 1482 }
dc4b78d9 1483 }
7a095ea6
DC
1484
1485 // Filter up to the last row in the superblock row
1486 apply_loop_filter(s, plane, 4*sb_y - !!sb_y, FFMIN(4*sb_y+3, fragment_height-1));
dc4b78d9
MM
1487 }
1488 }
1489
dc4b78d9
MM
1490 /* this looks like a good place for slice dispatch... */
1491 /* algorithm:
dc4b78d9 1492 * if (slice == s->macroblock_height - 1)
f44b08a5
MM
1493 * dispatch (both last slice & 2nd-to-last slice);
1494 * else if (slice > 0)
1495 * dispatch (slice - 1);
dc4b78d9
MM
1496 */
1497
d63a7187 1498 vp3_draw_horiz_band(s, FFMIN(64*slice + 64-16, s->height-16));
dc4b78d9
MM
1499}
1500
115329f1 1501/*
d86053a4
MM
1502 * This is the ffmpeg/libavcodec API init function.
1503 */
98a6fff9 1504static av_cold int vp3_decode_init(AVCodecContext *avctx)
d86053a4
MM
1505{
1506 Vp3DecodeContext *s = avctx->priv_data;
ae1dd8e1 1507 int i, inter, plane;
892fc83e
MM
1508 int c_width;
1509 int c_height;
1e76a1da 1510 int y_fragment_count, c_fragment_count;
d86053a4 1511
3c3f113e 1512 if (avctx->codec_tag == MKTAG('V','P','3','0'))
bb270c08 1513 s->version = 0;
3c3f113e 1514 else
bb270c08 1515 s->version = 1;
3c3f113e 1516
d86053a4 1517 s->avctx = avctx;
ef516f73
DC
1518 s->width = FFALIGN(avctx->width, 16);
1519 s->height = FFALIGN(avctx->height, 16);
1e76a1da
DC
1520 if (avctx->pix_fmt == PIX_FMT_NONE)
1521 avctx->pix_fmt = PIX_FMT_YUV420P;
580a7465 1522 avctx->chroma_sample_location = AVCHROMA_LOC_CENTER;
8b6103da
MN
1523 if(avctx->idct_algo==FF_IDCT_AUTO)
1524 avctx->idct_algo=FF_IDCT_VP3;
d86053a4 1525 dsputil_init(&s->dsp, avctx);
115329f1 1526
36af0c95 1527 ff_init_scantable(s->dsp.idct_permutation, &s->scantable, ff_zigzag_direct);
d86053a4
MM
1528
1529 /* initialize to an impossible value which will force a recalculation
1530 * in the first frame decode */
f2264fa5
DC
1531 for (i = 0; i < 3; i++)
1532 s->qps[i] = -1;
d86053a4 1533
1e76a1da
DC
1534 avcodec_get_chroma_sub_sample(avctx->pix_fmt, &s->chroma_x_shift, &s->chroma_y_shift);
1535
892fc83e
MM
1536 s->y_superblock_width = (s->width + 31) / 32;
1537 s->y_superblock_height = (s->height + 31) / 32;
35c28d23 1538 s->y_superblock_count = s->y_superblock_width * s->y_superblock_height;
892fc83e
MM
1539
1540 /* work out the dimensions for the C planes */
1e76a1da
DC
1541 c_width = s->width >> s->chroma_x_shift;
1542 c_height = s->height >> s->chroma_y_shift;
892fc83e
MM
1543 s->c_superblock_width = (c_width + 31) / 32;
1544 s->c_superblock_height = (c_height + 31) / 32;
35c28d23 1545 s->c_superblock_count = s->c_superblock_width * s->c_superblock_height;
892fc83e 1546
35c28d23
DC
1547 s->superblock_count = s->y_superblock_count + (s->c_superblock_count * 2);
1548 s->u_superblock_start = s->y_superblock_count;
1549 s->v_superblock_start = s->u_superblock_start + s->c_superblock_count;
d86053a4
MM
1550 s->superblock_coding = av_malloc(s->superblock_count);
1551
1552 s->macroblock_width = (s->width + 15) / 16;
1553 s->macroblock_height = (s->height + 15) / 16;
1554 s->macroblock_count = s->macroblock_width * s->macroblock_height;
1555
57783884
DC
1556 s->fragment_width[0] = s->width / FRAGMENT_PIXELS;
1557 s->fragment_height[0] = s->height / FRAGMENT_PIXELS;
1e76a1da
DC
1558 s->fragment_width[1] = s->fragment_width[0] >> s->chroma_x_shift;
1559 s->fragment_height[1] = s->fragment_height[0] >> s->chroma_y_shift;
d86053a4
MM
1560
1561 /* fragment count covers all 8x8 blocks for all 3 planes */
1e76a1da
DC
1562 y_fragment_count = s->fragment_width[0] * s->fragment_height[0];
1563 c_fragment_count = s->fragment_width[1] * s->fragment_height[1];
1564 s->fragment_count = y_fragment_count + 2*c_fragment_count;
1565 s->fragment_start[1] = y_fragment_count;
1566 s->fragment_start[2] = y_fragment_count + c_fragment_count;
d86053a4 1567
d86053a4 1568 s->all_fragments = av_malloc(s->fragment_count * sizeof(Vp3Fragment));
c72625f2
DC
1569 s->coded_fragment_list[0] = av_malloc(s->fragment_count * sizeof(int));
1570 s->dct_tokens_base = av_malloc(64*s->fragment_count * sizeof(*s->dct_tokens_base));
1571 if (!s->superblock_coding || !s->all_fragments || !s->dct_tokens_base ||
1572 !s->coded_fragment_list[0]) {
0efbd068
MM
1573 vp3_decode_end(avctx);
1574 return -1;
1575 }
d86053a4 1576
f44ee2c3
AB
1577 if (!s->theora_tables)
1578 {
2287c100 1579 for (i = 0; i < 64; i++) {
bb270c08 1580 s->coded_dc_scale_factor[i] = vp31_dc_scale_factor[i];
bb270c08 1581 s->coded_ac_scale_factor[i] = vp31_ac_scale_factor[i];
ae1dd8e1 1582 s->base_matrix[0][i] = vp31_intra_y_dequant[i];
ae1dd8e1 1583 s->base_matrix[1][i] = vp31_intra_c_dequant[i];
ae1dd8e1 1584 s->base_matrix[2][i] = vp31_inter_dequant[i];
bb270c08 1585 s->filter_limit_values[i] = vp31_filter_limit_values[i];
2287c100 1586 }
f44ee2c3 1587
ae1dd8e1
MN
1588 for(inter=0; inter<2; inter++){
1589 for(plane=0; plane<3; plane++){
1590 s->qr_count[inter][plane]= 1;
1591 s->qr_size [inter][plane][0]= 63;
1592 s->qr_base [inter][plane][0]=
1593 s->qr_base [inter][plane][1]= 2*inter + (!!plane)*!inter;
1594 }
1595 }
1596
39922395
MM
1597 /* init VLC tables */
1598 for (i = 0; i < 16; i++) {
1599
1600 /* DC histograms */
1601 init_vlc(&s->dc_vlc[i], 5, 32,
1602 &dc_bias[i][0][1], 4, 2,
1603 &dc_bias[i][0][0], 4, 2, 0);
1604
1605 /* group 1 AC histograms */
1606 init_vlc(&s->ac_vlc_1[i], 5, 32,
1607 &ac_bias_0[i][0][1], 4, 2,
1608 &ac_bias_0[i][0][0], 4, 2, 0);
1609
1610 /* group 2 AC histograms */
1611 init_vlc(&s->ac_vlc_2[i], 5, 32,
1612 &ac_bias_1[i][0][1], 4, 2,
1613 &ac_bias_1[i][0][0], 4, 2, 0);
1614
1615 /* group 3 AC histograms */
1616 init_vlc(&s->ac_vlc_3[i], 5, 32,
1617 &ac_bias_2[i][0][1], 4, 2,
1618 &ac_bias_2[i][0][0], 4, 2, 0);
1619
1620 /* group 4 AC histograms */
1621 init_vlc(&s->ac_vlc_4[i], 5, 32,
1622 &ac_bias_3[i][0][1], 4, 2,
1623 &ac_bias_3[i][0][0], 4, 2, 0);
1624 }
1625 } else {
1626 for (i = 0; i < 16; i++) {
1627
1628 /* DC histograms */
c4b7b8bf 1629 if (init_vlc(&s->dc_vlc[i], 5, 32,
39922395 1630 &s->huffman_table[i][0][1], 4, 2,
c4b7b8bf
RD
1631 &s->huffman_table[i][0][0], 4, 2, 0) < 0)
1632 goto vlc_fail;
39922395
MM
1633
1634 /* group 1 AC histograms */
c4b7b8bf 1635 if (init_vlc(&s->ac_vlc_1[i], 5, 32,
39922395 1636 &s->huffman_table[i+16][0][1], 4, 2,
c4b7b8bf
RD
1637 &s->huffman_table[i+16][0][0], 4, 2, 0) < 0)
1638 goto vlc_fail;
39922395
MM
1639
1640 /* group 2 AC histograms */
c4b7b8bf 1641 if (init_vlc(&s->ac_vlc_2[i], 5, 32,
39922395 1642 &s->huffman_table[i+16*2][0][1], 4, 2,
c4b7b8bf
RD
1643 &s->huffman_table[i+16*2][0][0], 4, 2, 0) < 0)
1644 goto vlc_fail;
39922395
MM
1645
1646 /* group 3 AC histograms */
c4b7b8bf 1647 if (init_vlc(&s->ac_vlc_3[i], 5, 32,
39922395 1648 &s->huffman_table[i+16*3][0][1], 4, 2,
c4b7b8bf
RD
1649 &s->huffman_table[i+16*3][0][0], 4, 2, 0) < 0)
1650 goto vlc_fail;
39922395
MM
1651
1652 /* group 4 AC histograms */
c4b7b8bf 1653 if (init_vlc(&s->ac_vlc_4[i], 5, 32,
39922395 1654 &s->huffman_table[i+16*4][0][1], 4, 2,
c4b7b8bf
RD
1655 &s->huffman_table[i+16*4][0][0], 4, 2, 0) < 0)
1656 goto vlc_fail;
39922395 1657 }
d86053a4
MM
1658 }
1659
d8278bab
MM
1660 init_vlc(&s->superblock_run_length_vlc, 6, 34,
1661 &superblock_run_length_vlc_table[0][1], 4, 2,
1662 &superblock_run_length_vlc_table[0][0], 4, 2, 0);
1663
dd36b667 1664 init_vlc(&s->fragment_run_length_vlc, 5, 30,
0ad72bdd
MM
1665 &fragment_run_length_vlc_table[0][1], 4, 2,
1666 &fragment_run_length_vlc_table[0][0], 4, 2, 0);
1667
1668 init_vlc(&s->mode_code_vlc, 3, 8,
1669 &mode_code_vlc_table[0][1], 2, 1,
1670 &mode_code_vlc_table[0][0], 2, 1, 0);
1671
1672 init_vlc(&s->motion_vector_vlc, 6, 63,
1673 &motion_vector_vlc_table[0][1], 2, 1,
1674 &motion_vector_vlc_table[0][0], 2, 1, 0);
1675
d86053a4
MM
1676 /* work out the block mapping tables */
1677 s->superblock_fragments = av_malloc(s->superblock_count * 16 * sizeof(int));
96a7e73b 1678 s->macroblock_coding = av_malloc(s->macroblock_count + 1);
ea676144 1679 if (!s->superblock_fragments || !s->macroblock_coding) {
0efbd068
MM
1680 vp3_decode_end(avctx);
1681 return -1;
1682 }
d86053a4
MM
1683 init_block_mapping(s);
1684
44ae98dd
MM
1685 for (i = 0; i < 3; i++) {
1686 s->current_frame.data[i] = NULL;
1687 s->last_frame.data[i] = NULL;
1688 s->golden_frame.data[i] = NULL;
61873c4a
MM
1689 }
1690
d86053a4 1691 return 0;
c4b7b8bf
RD
1692
1693vlc_fail:
1694 av_log(avctx, AV_LOG_FATAL, "Invalid huffman table\n");
1695 return -1;
d86053a4
MM
1696}
1697
1698/*
1699 * This is the ffmpeg/libavcodec API frame decode function.
1700 */
115329f1 1701static int vp3_decode_frame(AVCodecContext *avctx,
d86053a4 1702 void *data, int *data_size,
7a00bbad 1703 AVPacket *avpkt)
d86053a4 1704{
7a00bbad
TB
1705 const uint8_t *buf = avpkt->data;
1706 int buf_size = avpkt->size;
d86053a4
MM
1707 Vp3DecodeContext *s = avctx->priv_data;
1708 GetBitContext gb;
1709 static int counter = 0;
dc4b78d9 1710 int i;
d86053a4 1711
d86053a4 1712 init_get_bits(&gb, buf, buf_size * 8);
115329f1 1713
f44ee2c3
AB
1714 if (s->theora && get_bits1(&gb))
1715 {
bb270c08
DB
1716 av_log(avctx, AV_LOG_ERROR, "Header packet passed to frame decoder, skipping\n");
1717 return -1;
f44ee2c3 1718 }
3c3f113e
AB
1719
1720 s->keyframe = !get_bits1(&gb);
1721 if (!s->theora)
bb270c08 1722 skip_bits(&gb, 1);
f2264fa5
DC
1723 for (i = 0; i < 3; i++)
1724 s->last_qps[i] = s->qps[i];
efea8528 1725
f2264fa5 1726 s->nqps=0;
efea8528 1727 do{
f2264fa5
DC
1728 s->qps[s->nqps++]= get_bits(&gb, 6);
1729 } while(s->theora >= 0x030200 && s->nqps<3 && get_bits1(&gb));
1730 for (i = s->nqps; i < 3; i++)
1731 s->qps[i] = -1;
d86053a4 1732
f8830383 1733 if (s->avctx->debug & FF_DEBUG_PICT_INFO)
bb270c08 1734 av_log(s->avctx, AV_LOG_INFO, " VP3 %sframe #%d: Q index = %d\n",
f2264fa5 1735 s->keyframe?"key":"", counter, s->qps[0]);
d86053a4
MM
1736 counter++;
1737
f2264fa5 1738 if (s->qps[0] != s->last_qps[0])
f44b08a5 1739 init_loop_filter(s);
f2264fa5
DC
1740
1741 for (i = 0; i < s->nqps; i++)
1742 // reinit all dequantizers if the first one changed, because
1743 // the DC of the first quantizer must be used for all matrices
1744 if (s->qps[i] != s->last_qps[i] || s->qps[0] != s->last_qps[0])
1745 init_dequantizer(s, i);
642d7e84 1746
068e82ba
DC
1747 if (avctx->skip_frame >= AVDISCARD_NONKEY && !s->keyframe)
1748 return buf_size;
1749
739b5090 1750 s->current_frame.reference = 3;
ff65969f 1751 s->current_frame.pict_type = s->keyframe ? FF_I_TYPE : FF_P_TYPE;
739b5090
DC
1752 if (avctx->get_buffer(avctx, &s->current_frame) < 0) {
1753 av_log(s->avctx, AV_LOG_ERROR, "get_buffer() failed\n");
e72d2d12 1754 goto error;
739b5090
DC
1755 }
1756
d86053a4 1757 if (s->keyframe) {
bb270c08
DB
1758 if (!s->theora)
1759 {
1760 skip_bits(&gb, 4); /* width code */
1761 skip_bits(&gb, 4); /* height code */
1762 if (s->version)
1763 {
1764 s->version = get_bits(&gb, 5);
1765 if (counter == 1)
1766 av_log(s->avctx, AV_LOG_DEBUG, "VP version: %d\n", s->version);
1767 }
1768 }
1769 if (s->version || s->theora)
1770 {
1771 if (get_bits1(&gb))
1772 av_log(s->avctx, AV_LOG_ERROR, "Warning, unsupported keyframe coding type?!\n");
1773 skip_bits(&gb, 2); /* reserved? */
1774 }
d86053a4 1775 } else {
735acf56 1776 if (!s->golden_frame.data[0]) {
7a4e8b59 1777 av_log(s->avctx, AV_LOG_WARNING, "vp3: first frame not a keyframe\n");
ff65969f 1778
7a4e8b59 1779 s->golden_frame.reference = 3;
ff65969f 1780 s->golden_frame.pict_type = FF_I_TYPE;
7a4e8b59
DC
1781 if (avctx->get_buffer(avctx, &s->golden_frame) < 0) {
1782 av_log(s->avctx, AV_LOG_ERROR, "get_buffer() failed\n");
1783 goto error;
1784 }
1785 s->last_frame = s->golden_frame;
1786 s->last_frame.type = FF_BUFFER_TYPE_COPY;
d86053a4 1787 }
d86053a4
MM
1788 }
1789
b928ec64
MN
1790 s->current_frame.qscale_table= s->qscale_table; //FIXME allocate individual tables per AVFrame
1791 s->current_frame.qstride= 0;
1792
703acd54 1793 memset(s->all_fragments, 0, s->fragment_count * sizeof(Vp3Fragment));
d86053a4 1794
220a6f40
MN
1795 if (unpack_superblocks(s, &gb)){
1796 av_log(s->avctx, AV_LOG_ERROR, "error in unpack_superblocks\n");
e72d2d12 1797 goto error;
220a6f40 1798 }
220a6f40
MN
1799 if (unpack_modes(s, &gb)){
1800 av_log(s->avctx, AV_LOG_ERROR, "error in unpack_modes\n");
e72d2d12 1801 goto error;
220a6f40 1802 }
220a6f40
MN
1803 if (unpack_vectors(s, &gb)){
1804 av_log(s->avctx, AV_LOG_ERROR, "error in unpack_vectors\n");
e72d2d12 1805 goto error;
220a6f40 1806 }
f2264fa5
DC
1807 if (unpack_block_qpis(s, &gb)){
1808 av_log(s->avctx, AV_LOG_ERROR, "error in unpack_block_qpis\n");
e72d2d12 1809 goto error;
f2264fa5 1810 }
220a6f40
MN
1811 if (unpack_dct_coeffs(s, &gb)){
1812 av_log(s->avctx, AV_LOG_ERROR, "error in unpack_dct_coeffs\n");
e72d2d12 1813 goto error;
892fc83e 1814 }
735acf56
DC
1815
1816 for (i = 0; i < 3; i++) {
1e76a1da 1817 int height = s->height >> (i && s->chroma_y_shift);
735acf56
DC
1818 if (s->flipped_image)
1819 s->data_offset[i] = 0;
1820 else
1e76a1da 1821 s->data_offset[i] = (height-1) * s->current_frame.linesize[i];
735acf56 1822 }
d86053a4 1823
a8de3901 1824 s->last_slice_end = 0;
7a095ea6 1825 for (i = 0; i < s->c_superblock_height; i++)
dc4b78d9 1826 render_slice(s, i);
d86053a4 1827
256c0662
DC
1828 // filter the last row
1829 for (i = 0; i < 3; i++) {
1e76a1da 1830 int row = (s->height >> (3+(i && s->chroma_y_shift))) - 1;
256c0662
DC
1831 apply_loop_filter(s, i, row, row+1);
1832 }
a8de3901 1833 vp3_draw_horiz_band(s, s->height);
892fc83e 1834
d86053a4
MM
1835 *data_size=sizeof(AVFrame);
1836 *(AVFrame*)data= s->current_frame;
1837
44ae98dd
MM
1838 /* release the last frame, if it is allocated and if it is not the
1839 * golden frame */
0c9afacb 1840 if (s->last_frame.data[0] && s->last_frame.type != FF_BUFFER_TYPE_COPY)
44ae98dd 1841 avctx->release_buffer(avctx, &s->last_frame);
d86053a4 1842
61873c4a 1843 /* shuffle frames (last = current) */
4501e678 1844 s->last_frame= s->current_frame;
739b5090
DC
1845
1846 if (s->keyframe) {
1847 if (s->golden_frame.data[0])
1848 avctx->release_buffer(avctx, &s->golden_frame);
1849 s->golden_frame = s->current_frame;
0c9afacb 1850 s->last_frame.type = FF_BUFFER_TYPE_COPY;
739b5090
DC
1851 }
1852
8e39d4a7 1853 s->current_frame.data[0]= NULL; /* ensure that we catch any access to this released frame */
d86053a4
MM
1854
1855 return buf_size;
e72d2d12
DC
1856
1857error:
1858 if (s->current_frame.data[0])
1859 avctx->release_buffer(avctx, &s->current_frame);
1860 return -1;
d86053a4
MM
1861}
1862
1863/*
1864 * This is the ffmpeg/libavcodec API module cleanup function.
1865 */
98a6fff9 1866static av_cold int vp3_decode_end(AVCodecContext *avctx)
d86053a4
MM
1867{
1868 Vp3DecodeContext *s = avctx->priv_data;
6f4e2b5a 1869 int i;
d86053a4 1870
6f4e2b5a 1871 av_free(s->superblock_coding);
d86053a4 1872 av_free(s->all_fragments);
c72625f2
DC
1873 av_free(s->coded_fragment_list[0]);
1874 av_free(s->dct_tokens_base);
d86053a4 1875 av_free(s->superblock_fragments);
96a7e73b 1876 av_free(s->macroblock_coding);
115329f1 1877
6f4e2b5a
MR
1878 for (i = 0; i < 16; i++) {
1879 free_vlc(&s->dc_vlc[i]);
1880 free_vlc(&s->ac_vlc_1[i]);
1881 free_vlc(&s->ac_vlc_2[i]);
1882 free_vlc(&s->ac_vlc_3[i]);
1883 free_vlc(&s->ac_vlc_4[i]);
1884 }
1885
1886 free_vlc(&s->superblock_run_length_vlc);
1887 free_vlc(&s->fragment_run_length_vlc);
1888 free_vlc(&s->mode_code_vlc);
1889 free_vlc(&s->motion_vector_vlc);
1890
d86053a4 1891 /* release all frames */
0c9afacb 1892 if (s->golden_frame.data[0])
892fc83e 1893 avctx->release_buffer(avctx, &s->golden_frame);
0c9afacb 1894 if (s->last_frame.data[0] && s->last_frame.type != FF_BUFFER_TYPE_COPY)
892fc83e
MM
1895 avctx->release_buffer(avctx, &s->last_frame);
1896 /* no need to release the current_frame since it will always be pointing
1897 * to the same frame as either the golden or last frame */
d86053a4
MM
1898
1899 return 0;
1900}
1901
39922395
MM
1902static int read_huffman_tree(AVCodecContext *avctx, GetBitContext *gb)
1903{
1904 Vp3DecodeContext *s = avctx->priv_data;
1905
5fc32c27 1906 if (get_bits1(gb)) {
39922395
MM
1907 int token;
1908 if (s->entries >= 32) { /* overflow */
1909 av_log(avctx, AV_LOG_ERROR, "huffman tree overflow\n");
1910 return -1;
1911 }
1912 token = get_bits(gb, 5);
1913 //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);
1914 s->huffman_table[s->hti][token][0] = s->hbits;
1915 s->huffman_table[s->hti][token][1] = s->huff_code_size;
1916 s->entries++;
1917 }
1918 else {
1919 if (s->huff_code_size >= 32) {/* overflow */
1920 av_log(avctx, AV_LOG_ERROR, "huffman tree overflow\n");
1921 return -1;
1922 }
1923 s->huff_code_size++;
1924 s->hbits <<= 1;
00bbe276
AC
1925 if (read_huffman_tree(avctx, gb))
1926 return -1;
39922395 1927 s->hbits |= 1;
00bbe276
AC
1928 if (read_huffman_tree(avctx, gb))
1929 return -1;
39922395
MM
1930 s->hbits >>= 1;
1931 s->huff_code_size--;
1932 }
1933 return 0;
1934}
1935
b250f9c6 1936#if CONFIG_THEORA_DECODER
1e76a1da
DC
1937static const enum PixelFormat theora_pix_fmts[4] = {
1938 PIX_FMT_YUV420P, PIX_FMT_NONE, PIX_FMT_YUV422P, PIX_FMT_YUV444P
1939};
1940
e278056f 1941static int theora_decode_header(AVCodecContext *avctx, GetBitContext *gb)
f44ee2c3
AB
1942{
1943 Vp3DecodeContext *s = avctx->priv_data;
ea3c2d53 1944 int visible_width, visible_height, colorspace;
9a7ad925 1945
e278056f 1946 s->theora = get_bits_long(gb, 24);
356306ac 1947 av_log(avctx, AV_LOG_DEBUG, "Theora bitstream version %X\n", s->theora);
105c3d25 1948
ba7ee4a4 1949 /* 3.2.0 aka alpha3 has the same frame orientation as original vp3 */
9a7ad925 1950 /* but previous versions have the image flipped relative to vp3 */
ba7ee4a4 1951 if (s->theora < 0x030200)
9a7ad925 1952 {
bb270c08 1953 s->flipped_image = 1;
9a7ad925
AB
1954 av_log(avctx, AV_LOG_DEBUG, "Old (<alpha3) Theora bitstream, flipped image\n");
1955 }
f44ee2c3 1956
277e3e53
DC
1957 visible_width = s->width = get_bits(gb, 16) << 4;
1958 visible_height = s->height = get_bits(gb, 16) << 4;
115329f1 1959
0ecca7a4 1960 if(avcodec_check_dimensions(avctx, s->width, s->height)){
7146d2c2 1961 av_log(avctx, AV_LOG_ERROR, "Invalid dimensions (%dx%d)\n", s->width, s->height);
0ecca7a4
MN
1962 s->width= s->height= 0;
1963 return -1;
1964 }
7146d2c2 1965
277e3e53 1966 if (s->theora >= 0x030200) {
a0ce2d1b
DC
1967 visible_width = get_bits_long(gb, 24);
1968 visible_height = get_bits_long(gb, 24);
c0f716b8 1969
ba4816a0
AJ
1970 skip_bits(gb, 8); /* offset x */
1971 skip_bits(gb, 8); /* offset y */
1972 }
f44ee2c3 1973
e278056f
MN
1974 skip_bits(gb, 32); /* fps numerator */
1975 skip_bits(gb, 32); /* fps denumerator */
1976 skip_bits(gb, 24); /* aspect numerator */
1977 skip_bits(gb, 24); /* aspect denumerator */
115329f1 1978
ba7ee4a4 1979 if (s->theora < 0x030200)
e278056f 1980 skip_bits(gb, 5); /* keyframe frequency force */
ea3c2d53 1981 colorspace = get_bits(gb, 8);
e278056f 1982 skip_bits(gb, 24); /* bitrate */
f44ee2c3 1983
e278056f 1984 skip_bits(gb, 6); /* quality hint */
115329f1 1985
ba7ee4a4 1986 if (s->theora >= 0x030200)
105c3d25 1987 {
e278056f 1988 skip_bits(gb, 5); /* keyframe frequency force */
1e76a1da 1989 avctx->pix_fmt = theora_pix_fmts[get_bits(gb, 2)];
337f5c6e 1990 skip_bits(gb, 3); /* reserved */
105c3d25 1991 }
115329f1 1992
e278056f 1993// align_get_bits(gb);
115329f1 1994
c0f716b8
AJ
1995 if ( visible_width <= s->width && visible_width > s->width-16
1996 && visible_height <= s->height && visible_height > s->height-16)
1997 avcodec_set_dimensions(avctx, visible_width, visible_height);
1998 else
1999 avcodec_set_dimensions(avctx, s->width, s->height);
f44ee2c3 2000
ea3c2d53
DC
2001 if (colorspace == 1) {
2002 avctx->color_primaries = AVCOL_PRI_BT470M;
2003 } else if (colorspace == 2) {
2004 avctx->color_primaries = AVCOL_PRI_BT470BG;
2005 }
2006 if (colorspace == 1 || colorspace == 2) {
2007 avctx->colorspace = AVCOL_SPC_BT470BG;
2008 avctx->color_trc = AVCOL_TRC_BT709;
2009 }
2010
f44ee2c3
AB
2011 return 0;
2012}
2013
e278056f 2014static int theora_decode_tables(AVCodecContext *avctx, GetBitContext *gb)
f44ee2c3
AB
2015{
2016 Vp3DecodeContext *s = avctx->priv_data;
ae1dd8e1 2017 int i, n, matrices, inter, plane;
ba7ee4a4
MC
2018
2019 if (s->theora >= 0x030200) {
e278056f 2020 n = get_bits(gb, 3);
9c7154c7 2021 /* loop filter limit values table */
e13cca4b 2022 for (i = 0; i < 64; i++) {
e278056f 2023 s->filter_limit_values[i] = get_bits(gb, n);
e13cca4b
RD
2024 if (s->filter_limit_values[i] > 127) {
2025 av_log(avctx, AV_LOG_ERROR, "filter limit value too large (%i > 127), clamping\n", s->filter_limit_values[i]);
2026 s->filter_limit_values[i] = 127;
2027 }
2028 }
ba7ee4a4 2029 }
115329f1 2030
ba7ee4a4 2031 if (s->theora >= 0x030200)
e278056f 2032 n = get_bits(gb, 4) + 1;
ba7ee4a4
MC
2033 else
2034 n = 16;
f44ee2c3
AB
2035 /* quality threshold table */
2036 for (i = 0; i < 64; i++)
e278056f 2037 s->coded_ac_scale_factor[i] = get_bits(gb, n);
f44ee2c3 2038
ba7ee4a4 2039 if (s->theora >= 0x030200)
e278056f 2040 n = get_bits(gb, 4) + 1;
ba7ee4a4
MC
2041 else
2042 n = 16;
f44ee2c3
AB
2043 /* dc scale factor table */
2044 for (i = 0; i < 64; i++)
e278056f 2045 s->coded_dc_scale_factor[i] = get_bits(gb, n);
f44ee2c3 2046
ba7ee4a4 2047 if (s->theora >= 0x030200)
e278056f 2048 matrices = get_bits(gb, 9) + 1;
ba7ee4a4 2049 else
2da2ba03 2050 matrices = 3;
f44ee2c3 2051
ae1dd8e1
MN
2052 if(matrices > 384){
2053 av_log(avctx, AV_LOG_ERROR, "invalid number of base matrixes\n");
2054 return -1;
2055 }
3c3f113e 2056
ae1dd8e1 2057 for(n=0; n<matrices; n++){
bb270c08 2058 for (i = 0; i < 64; i++)
ae1dd8e1
MN
2059 s->base_matrix[n][i]= get_bits(gb, 8);
2060 }
2da2ba03 2061
ae1dd8e1
MN
2062 for (inter = 0; inter <= 1; inter++) {
2063 for (plane = 0; plane <= 2; plane++) {
2064 int newqr= 1;
2065 if (inter || plane > 0)
5fc32c27 2066 newqr = get_bits1(gb);
39922395 2067 if (!newqr) {
ae1dd8e1 2068 int qtj, plj;
5fc32c27 2069 if(inter && get_bits1(gb)){
ae1dd8e1
MN
2070 qtj = 0;
2071 plj = plane;
2072 }else{
2073 qtj= (3*inter + plane - 1) / 3;
2074 plj= (plane + 2) % 3;
2075 }
2076 s->qr_count[inter][plane]= s->qr_count[qtj][plj];
2077 memcpy(s->qr_size[inter][plane], s->qr_size[qtj][plj], sizeof(s->qr_size[0][0]));
2078 memcpy(s->qr_base[inter][plane], s->qr_base[qtj][plj], sizeof(s->qr_base[0][0]));
2079 } else {
2080 int qri= 0;
39922395 2081 int qi = 0;
ae1dd8e1
MN
2082
2083 for(;;){
2084 i= get_bits(gb, av_log2(matrices-1)+1);
2085 if(i>= matrices){
2086 av_log(avctx, AV_LOG_ERROR, "invalid base matrix index\n");
2087 return -1;
2088 }
2089 s->qr_base[inter][plane][qri]= i;
2090 if(qi >= 63)
2091 break;
2092 i = get_bits(gb, av_log2(63-qi)+1) + 1;
2093 s->qr_size[inter][plane][qri++]= i;
2094 qi += i;
39922395 2095 }
ae1dd8e1 2096
2da2ba03 2097 if (qi > 63) {
7146d2c2 2098 av_log(avctx, AV_LOG_ERROR, "invalid qi %d > 63\n", qi);
bb270c08
DB
2099 return -1;
2100 }
ae1dd8e1 2101 s->qr_count[inter][plane]= qri;
39922395
MM
2102 }
2103 }
2104 }
2105
2da2ba03 2106 /* Huffman tables */
39922395
MM
2107 for (s->hti = 0; s->hti < 80; s->hti++) {
2108 s->entries = 0;
2109 s->huff_code_size = 1;
5fc32c27 2110 if (!get_bits1(gb)) {
39922395 2111 s->hbits = 0;
00bbe276
AC
2112 if(read_huffman_tree(avctx, gb))
2113 return -1;
39922395 2114 s->hbits = 1;
00bbe276
AC
2115 if(read_huffman_tree(avctx, gb))
2116 return -1;
39922395
MM
2117 }
2118 }
115329f1 2119
f44ee2c3 2120 s->theora_tables = 1;
115329f1 2121
f44ee2c3
AB
2122 return 0;
2123}
2124
5ef251e5 2125static av_cold int theora_decode_init(AVCodecContext *avctx)
f44ee2c3
AB
2126{
2127 Vp3DecodeContext *s = avctx->priv_data;
2128 GetBitContext gb;
2129 int ptype;
da91ed59
AJ
2130 uint8_t *header_start[3];
2131 int header_len[3];
2132 int i;
115329f1 2133
f44ee2c3
AB
2134 s->theora = 1;
2135
2136 if (!avctx->extradata_size)
7146d2c2
AB
2137 {
2138 av_log(avctx, AV_LOG_ERROR, "Missing extradata!\n");
bb270c08 2139 return -1;
7146d2c2 2140 }
f44ee2c3 2141
da91ed59
AJ
2142 if (ff_split_xiph_headers(avctx->extradata, avctx->extradata_size,
2143 42, header_start, header_len) < 0) {
2144 av_log(avctx, AV_LOG_ERROR, "Corrupt extradata\n");
2145 return -1;
2146 }
ee89b2b9 2147
da91ed59 2148 for(i=0;i<3;i++) {
fa6f2751 2149 init_get_bits(&gb, header_start[i], header_len[i] * 8);
f44ee2c3
AB
2150
2151 ptype = get_bits(&gb, 8);
115329f1 2152
7146d2c2
AB
2153 if (!(ptype & 0x80))
2154 {
2155 av_log(avctx, AV_LOG_ERROR, "Invalid extradata!\n");
e278056f 2156// return -1;
115329f1 2157 }
7146d2c2 2158
3700dab4 2159 // FIXME: Check for this as well.
0a8dedc9 2160 skip_bits_long(&gb, 6*8); /* "theora" */
115329f1 2161
f44ee2c3
AB
2162 switch(ptype)
2163 {
2164 case 0x80:
e278056f 2165 theora_decode_header(avctx, &gb);
bb270c08
DB
2166 break;
2167 case 0x81:
2da2ba03 2168// FIXME: is this needed? it breaks sometimes
bb270c08
DB
2169// theora_decode_comments(avctx, gb);
2170 break;
2171 case 0x82:
00bbe276
AC
2172 if (theora_decode_tables(avctx, &gb))
2173 return -1;
bb270c08
DB
2174 break;
2175 default:
2176 av_log(avctx, AV_LOG_ERROR, "Unknown Theora config packet: %d\n", ptype&~0x80);
2177 break;
f44ee2c3 2178 }
12ce1f3f
DC
2179 if(ptype != 0x81 && 8*header_len[i] != get_bits_count(&gb))
2180 av_log(avctx, AV_LOG_WARNING, "%d bits left in packet %X\n", 8*header_len[i] - get_bits_count(&gb), ptype);
116d866c
MC
2181 if (s->theora < 0x030200)
2182 break;
ee89b2b9 2183 }
f44ee2c3 2184
c79c960a 2185 return vp3_decode_init(avctx);
f44ee2c3
AB
2186}
2187
6f6a3e2a
DB
2188AVCodec theora_decoder = {
2189 "theora",
d86053a4 2190 CODEC_TYPE_VIDEO,
6f6a3e2a 2191 CODEC_ID_THEORA,
d86053a4 2192 sizeof(Vp3DecodeContext),
6f6a3e2a 2193 theora_decode_init,
d86053a4
MM
2194 NULL,
2195 vp3_decode_end,
2196 vp3_decode_frame,
a8de3901 2197 CODEC_CAP_DR1 | CODEC_CAP_DRAW_HORIZ_BAND,
d5202e4f 2198 NULL,
fe4bf374 2199 .long_name = NULL_IF_CONFIG_SMALL("Theora"),
d86053a4 2200};
6f6a3e2a 2201#endif
f44ee2c3 2202
6f6a3e2a
DB
2203AVCodec vp3_decoder = {
2204 "vp3",
f44ee2c3 2205 CODEC_TYPE_VIDEO,
6f6a3e2a 2206 CODEC_ID_VP3,
f44ee2c3 2207 sizeof(Vp3DecodeContext),
6f6a3e2a 2208 vp3_decode_init,
f44ee2c3
AB
2209 NULL,
2210 vp3_decode_end,
2211 vp3_decode_frame,
a8de3901 2212 CODEC_CAP_DR1 | CODEC_CAP_DRAW_HORIZ_BAND,
d5202e4f 2213 NULL,
fe4bf374 2214 .long_name = NULL_IF_CONFIG_SMALL("On2 VP3"),
f44ee2c3 2215};