vp3: Read fps and aspect ratio in the decoder
[libav.git] / libavcodec / vp3.c
CommitLineData
d86053a4 1/*
67335dbc 2 * Copyright (C) 2003-2004 the ffmpeg project
d86053a4 3 *
b78e7197
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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
0efbd068
MM
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;
f2264fa5 51 uint8_t qpi;
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MM
52} Vp3Fragment;
53
54#define SB_NOT_CODED 0
55#define SB_PARTIALLY_CODED 1
56#define SB_FULLY_CODED 2
57
ecb51b25
DC
58// This is the maximum length of a single long bit run that can be encoded
59// for superblock coding or block qps. Theora special-cases this to read a
60// bit instead of flipping the current bit to allow for runs longer than 4129.
61#define MAXIMUM_LONG_BIT_RUN 4129
62
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63#define MODE_INTER_NO_MV 0
64#define MODE_INTRA 1
65#define MODE_INTER_PLUS_MV 2
66#define MODE_INTER_LAST_MV 3
67#define MODE_INTER_PRIOR_LAST 4
68#define MODE_USING_GOLDEN 5
69#define MODE_GOLDEN_MV 6
70#define MODE_INTER_FOURMV 7
71#define CODING_MODE_COUNT 8
72
73/* special internal mode */
74#define MODE_COPY 8
75
76/* There are 6 preset schemes, plus a free-form scheme */
e8e47435 77static const int ModeAlphabet[6][CODING_MODE_COUNT] =
d86053a4 78{
d86053a4 79 /* scheme 1: Last motion vector dominates */
115329f1 80 { MODE_INTER_LAST_MV, MODE_INTER_PRIOR_LAST,
d86053a4 81 MODE_INTER_PLUS_MV, MODE_INTER_NO_MV,
115329f1 82 MODE_INTRA, MODE_USING_GOLDEN,
d86053a4
MM
83 MODE_GOLDEN_MV, MODE_INTER_FOURMV },
84
85 /* scheme 2 */
115329f1 86 { MODE_INTER_LAST_MV, MODE_INTER_PRIOR_LAST,
d86053a4 87 MODE_INTER_NO_MV, MODE_INTER_PLUS_MV,
115329f1 88 MODE_INTRA, MODE_USING_GOLDEN,
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MM
89 MODE_GOLDEN_MV, MODE_INTER_FOURMV },
90
91 /* scheme 3 */
115329f1 92 { MODE_INTER_LAST_MV, MODE_INTER_PLUS_MV,
d86053a4 93 MODE_INTER_PRIOR_LAST, MODE_INTER_NO_MV,
115329f1 94 MODE_INTRA, MODE_USING_GOLDEN,
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MM
95 MODE_GOLDEN_MV, MODE_INTER_FOURMV },
96
97 /* scheme 4 */
115329f1 98 { MODE_INTER_LAST_MV, MODE_INTER_PLUS_MV,
d86053a4 99 MODE_INTER_NO_MV, MODE_INTER_PRIOR_LAST,
115329f1 100 MODE_INTRA, MODE_USING_GOLDEN,
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MM
101 MODE_GOLDEN_MV, MODE_INTER_FOURMV },
102
103 /* scheme 5: No motion vector dominates */
115329f1 104 { MODE_INTER_NO_MV, MODE_INTER_LAST_MV,
d86053a4 105 MODE_INTER_PRIOR_LAST, MODE_INTER_PLUS_MV,
115329f1 106 MODE_INTRA, MODE_USING_GOLDEN,
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MM
107 MODE_GOLDEN_MV, MODE_INTER_FOURMV },
108
109 /* scheme 6 */
115329f1 110 { MODE_INTER_NO_MV, MODE_USING_GOLDEN,
d86053a4 111 MODE_INTER_LAST_MV, MODE_INTER_PRIOR_LAST,
115329f1 112 MODE_INTER_PLUS_MV, MODE_INTRA,
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MM
113 MODE_GOLDEN_MV, MODE_INTER_FOURMV },
114
115};
116
7a095ea6
DC
117static const uint8_t hilbert_offset[16][2] = {
118 {0,0}, {1,0}, {1,1}, {0,1},
119 {0,2}, {0,3}, {1,3}, {1,2},
120 {2,2}, {2,3}, {3,3}, {3,2},
121 {3,1}, {2,1}, {2,0}, {3,0}
122};
123
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124#define MIN_DEQUANT_VAL 2
125
126typedef struct Vp3DecodeContext {
127 AVCodecContext *avctx;
f44ee2c3 128 int theora, theora_tables;
3c3f113e 129 int version;
d86053a4 130 int width, height;
1e76a1da 131 int chroma_x_shift, chroma_y_shift;
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MM
132 AVFrame golden_frame;
133 AVFrame last_frame;
134 AVFrame current_frame;
135 int keyframe;
136 DSPContext dsp;
9a7ad925 137 int flipped_image;
a8de3901 138 int last_slice_end;
d86053a4 139
f2264fa5
DC
140 int qps[3];
141 int nqps;
142 int last_qps[3];
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MM
143
144 int superblock_count;
892fc83e
MM
145 int y_superblock_width;
146 int y_superblock_height;
35c28d23 147 int y_superblock_count;
892fc83e
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148 int c_superblock_width;
149 int c_superblock_height;
35c28d23 150 int c_superblock_count;
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151 int u_superblock_start;
152 int v_superblock_start;
153 unsigned char *superblock_coding;
154
155 int macroblock_count;
156 int macroblock_width;
157 int macroblock_height;
158
159 int fragment_count;
57783884
DC
160 int fragment_width[2];
161 int fragment_height[2];
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162
163 Vp3Fragment *all_fragments;
1abbf64e 164 int fragment_start[3];
735acf56 165 int data_offset[3];
115329f1 166
14268254
DC
167 int8_t (*motion_val[2])[2];
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
0ad72bdd
MM
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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MM
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
892fc83e
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 */
d86053a4
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287}
288
289/*
f44b08a5 290 * This function sets up the dequantization tables used for a particular
d86053a4
MM
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);
60867312 382 while (current_superblock < s->superblock_count && get_bits_left(gb) > 0) {
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);
60867312
DC
412 while (superblocks_decoded < s->superblock_count - num_partial_superblocks
413 && get_bits_left(gb) > 0) {
115329f1 414 current_run = get_vlc2(gb,
855c720c
DC
415 s->superblock_run_length_vlc.table, 6, 2) + 1;
416 if (current_run == 34)
d8278bab 417 current_run += get_bits(gb, 12);
855c720c
DC
418
419 for (j = 0; j < current_run; current_superblock++) {
420 if (current_superblock >= s->superblock_count) {
421 av_log(s->avctx, AV_LOG_ERROR, "Invalid fully coded superblock run length\n");
422 return -1;
d86053a4 423 }
855c720c
DC
424
425 /* skip any superblocks already marked as partially coded */
426 if (s->superblock_coding[current_superblock] == SB_NOT_CODED) {
b5da3635 427 s->superblock_coding[current_superblock] = 2*bit;
855c720c
DC
428 j++;
429 }
d86053a4 430 }
855c720c
DC
431 superblocks_decoded += current_run;
432
a8926476
DC
433 if (s->theora && current_run == MAXIMUM_LONG_BIT_RUN)
434 bit = get_bits1(gb);
435 else
855c720c 436 bit ^= 1;
d86053a4
MM
437 }
438 }
439
440 /* if there were partial blocks, initialize bitstream for
441 * unpacking fragment codings */
855c720c 442 if (num_partial_superblocks) {
d86053a4
MM
443
444 current_run = 0;
5fc32c27 445 bit = get_bits1(gb);
115329f1 446 /* toggle the bit because as soon as the first run length is
d86053a4
MM
447 * fetched the bit will be toggled again */
448 bit ^= 1;
449 }
450 }
451
452 /* figure out which fragments are coded; iterate through each
453 * superblock (all planes) */
c72625f2 454 s->total_num_coded_frags = 0;
96a7e73b 455 memset(s->macroblock_coding, MODE_COPY, s->macroblock_count);
35c28d23
DC
456
457 for (plane = 0; plane < 3; plane++) {
e2720b6b 458 int sb_start = superblock_starts[plane];
35c28d23 459 int sb_end = sb_start + (plane ? s->c_superblock_count : s->y_superblock_count);
c72625f2 460 int num_coded_frags = 0;
35c28d23 461
60867312 462 for (i = sb_start; i < sb_end && get_bits_left(gb) > 0; i++) {
d86053a4
MM
463
464 /* iterate through all 16 fragments in a superblock */
465 for (j = 0; j < 16; j++) {
466
467 /* if the fragment is in bounds, check its coding status */
468 current_fragment = s->superblock_fragments[i * 16 + j];
469 if (current_fragment != -1) {
6cb35b45 470 int coded = s->superblock_coding[i];
d86053a4 471
6cb35b45 472 if (s->superblock_coding[i] == SB_PARTIALLY_CODED) {
d86053a4
MM
473
474 /* fragment may or may not be coded; this is the case
475 * that cares about the fragment coding runs */
b5da3635 476 if (current_run-- == 0) {
d86053a4 477 bit ^= 1;
115329f1 478 current_run = get_vlc2(gb,
b5da3635 479 s->fragment_run_length_vlc.table, 5, 2);
d86053a4 480 }
6cb35b45
DC
481 coded = bit;
482 }
d86053a4 483
6cb35b45 484 if (coded) {
115329f1 485 /* default mode; actual mode will be decoded in
22493ab9 486 * the next phase */
115329f1 487 s->all_fragments[current_fragment].coding_method =
d86053a4 488 MODE_INTER_NO_MV;
c72625f2 489 s->coded_fragment_list[plane][num_coded_frags++] =
d86053a4 490 current_fragment;
d86053a4
MM
491 } else {
492 /* not coded; copy this fragment from the prior frame */
493 s->all_fragments[current_fragment].coding_method =
494 MODE_COPY;
d86053a4 495 }
d86053a4
MM
496 }
497 }
498 }
c72625f2
DC
499 s->total_num_coded_frags += num_coded_frags;
500 for (i = 0; i < 64; i++)
501 s->num_coded_frags[plane][i] = num_coded_frags;
502 if (plane < 2)
503 s->coded_fragment_list[plane+1] = s->coded_fragment_list[plane] + num_coded_frags;
35c28d23 504 }
892fc83e 505 return 0;
d86053a4
MM
506}
507
508/*
509 * This function unpacks all the coding mode data for individual macroblocks
510 * from the bitstream.
511 */
892fc83e 512static int unpack_modes(Vp3DecodeContext *s, GetBitContext *gb)
d86053a4 513{
19cd517d 514 int i, j, k, sb_x, sb_y;
d86053a4
MM
515 int scheme;
516 int current_macroblock;
517 int current_fragment;
518 int coding_mode;
e8e47435 519 int custom_mode_alphabet[CODING_MODE_COUNT];
7c2e31d1 520 const int *alphabet;
1e76a1da 521 Vp3Fragment *frag;
d86053a4 522
d86053a4 523 if (s->keyframe) {
d86053a4
MM
524 for (i = 0; i < s->fragment_count; i++)
525 s->all_fragments[i].coding_method = MODE_INTRA;
526
527 } else {
528
529 /* fetch the mode coding scheme for this frame */
530 scheme = get_bits(gb, 3);
d86053a4
MM
531
532 /* is it a custom coding scheme? */
533 if (scheme == 0) {
d86053a4 534 for (i = 0; i < 8; i++)
2c823b3c
AC
535 custom_mode_alphabet[i] = MODE_INTER_NO_MV;
536 for (i = 0; i < 8; i++)
e8e47435 537 custom_mode_alphabet[get_bits(gb, 3)] = i;
7c2e31d1
DC
538 alphabet = custom_mode_alphabet;
539 } else
540 alphabet = ModeAlphabet[scheme-1];
d86053a4 541
d86053a4
MM
542 /* iterate through all of the macroblocks that contain 1 or more
543 * coded fragments */
19cd517d
DC
544 for (sb_y = 0; sb_y < s->y_superblock_height; sb_y++) {
545 for (sb_x = 0; sb_x < s->y_superblock_width; sb_x++) {
60867312
DC
546 if (get_bits_left(gb) <= 0)
547 return -1;
d86053a4
MM
548
549 for (j = 0; j < 4; j++) {
19cd517d
DC
550 int mb_x = 2*sb_x + (j>>1);
551 int mb_y = 2*sb_y + (((j>>1)+j)&1);
552 current_macroblock = mb_y * s->macroblock_width + mb_x;
553
15675ce6 554 if (mb_x >= s->macroblock_width || mb_y >= s->macroblock_height)
d86053a4
MM
555 continue;
556
ea676144
DC
557#define BLOCK_X (2*mb_x + (k&1))
558#define BLOCK_Y (2*mb_y + (k>>1))
15675ce6
DC
559 /* coding modes are only stored if the macroblock has at least one
560 * luma block coded, otherwise it must be INTER_NO_MV */
561 for (k = 0; k < 4; k++) {
57783884 562 current_fragment = BLOCK_Y*s->fragment_width[0] + BLOCK_X;
15675ce6
DC
563 if (s->all_fragments[current_fragment].coding_method != MODE_COPY)
564 break;
565 }
566 if (k == 4) {
567 s->macroblock_coding[current_macroblock] = MODE_INTER_NO_MV;
568 continue;
569 }
ea676144 570
d86053a4
MM
571 /* mode 7 means get 3 bits for each coding mode */
572 if (scheme == 7)
573 coding_mode = get_bits(gb, 3);
574 else
7c2e31d1 575 coding_mode = alphabet
0ad72bdd 576 [get_vlc2(gb, s->mode_code_vlc.table, 3, 3)];
d86053a4 577
96a7e73b 578 s->macroblock_coding[current_macroblock] = coding_mode;
ea676144 579 for (k = 0; k < 4; k++) {
1e76a1da
DC
580 frag = s->all_fragments + BLOCK_Y*s->fragment_width[0] + BLOCK_X;
581 if (frag->coding_method != MODE_COPY)
582 frag->coding_method = coding_mode;
ea676144 583 }
1e76a1da
DC
584
585#define SET_CHROMA_MODES \
586 if (frag[s->fragment_start[1]].coding_method != MODE_COPY) \
587 frag[s->fragment_start[1]].coding_method = coding_mode;\
588 if (frag[s->fragment_start[2]].coding_method != MODE_COPY) \
589 frag[s->fragment_start[2]].coding_method = coding_mode;
590
591 if (s->chroma_y_shift) {
592 frag = s->all_fragments + mb_y*s->fragment_width[1] + mb_x;
593 SET_CHROMA_MODES
594 } else if (s->chroma_x_shift) {
595 frag = s->all_fragments + 2*mb_y*s->fragment_width[1] + mb_x;
596 for (k = 0; k < 2; k++) {
597 SET_CHROMA_MODES
598 frag += s->fragment_width[1];
599 }
600 } else {
601 for (k = 0; k < 4; k++) {
602 frag = s->all_fragments + BLOCK_Y*s->fragment_width[1] + BLOCK_X;
603 SET_CHROMA_MODES
604 }
d86053a4 605 }
d86053a4 606 }
19cd517d 607 }
d86053a4
MM
608 }
609 }
892fc83e
MM
610
611 return 0;
44ae98dd
MM
612}
613
614/*
d86053a4
MM
615 * This function unpacks all the motion vectors for the individual
616 * macroblocks from the bitstream.
617 */
892fc83e 618static int unpack_vectors(Vp3DecodeContext *s, GetBitContext *gb)
d86053a4 619{
eb691ef2 620 int j, k, sb_x, sb_y;
d86053a4 621 int coding_mode;
1c183aa4
DC
622 int motion_x[4];
623 int motion_y[4];
d86053a4
MM
624 int last_motion_x = 0;
625 int last_motion_y = 0;
626 int prior_last_motion_x = 0;
627 int prior_last_motion_y = 0;
628 int current_macroblock;
629 int current_fragment;
14268254 630 int frag;
d86053a4 631
6599e2a7 632 if (s->keyframe)
6298f49f 633 return 0;
10f38380 634
1ae4518d
DC
635 /* coding mode 0 is the VLC scheme; 1 is the fixed code scheme */
636 coding_mode = get_bits1(gb);
d86053a4 637
1ae4518d
DC
638 /* iterate through all of the macroblocks that contain 1 or more
639 * coded fragments */
19cd517d
DC
640 for (sb_y = 0; sb_y < s->y_superblock_height; sb_y++) {
641 for (sb_x = 0; sb_x < s->y_superblock_width; sb_x++) {
60867312
DC
642 if (get_bits_left(gb) <= 0)
643 return -1;
d86053a4 644
1ae4518d 645 for (j = 0; j < 4; j++) {
19cd517d
DC
646 int mb_x = 2*sb_x + (j>>1);
647 int mb_y = 2*sb_y + (((j>>1)+j)&1);
648 current_macroblock = mb_y * s->macroblock_width + mb_x;
649
650 if (mb_x >= s->macroblock_width || mb_y >= s->macroblock_height ||
1ae4518d
DC
651 (s->macroblock_coding[current_macroblock] == MODE_COPY))
652 continue;
d86053a4 653
1ae4518d
DC
654 switch (s->macroblock_coding[current_macroblock]) {
655
656 case MODE_INTER_PLUS_MV:
657 case MODE_GOLDEN_MV:
658 /* all 6 fragments use the same motion vector */
659 if (coding_mode == 0) {
660 motion_x[0] = motion_vector_table[get_vlc2(gb, s->motion_vector_vlc.table, 6, 2)];
661 motion_y[0] = motion_vector_table[get_vlc2(gb, s->motion_vector_vlc.table, 6, 2)];
662 } else {
663 motion_x[0] = fixed_motion_vector_table[get_bits(gb, 6)];
664 motion_y[0] = fixed_motion_vector_table[get_bits(gb, 6)];
892fc83e 665 }
7f9926a4 666
1ae4518d
DC
667 /* vector maintenance, only on MODE_INTER_PLUS_MV */
668 if (s->macroblock_coding[current_macroblock] ==
669 MODE_INTER_PLUS_MV) {
e32e2d56
AJ
670 prior_last_motion_x = last_motion_x;
671 prior_last_motion_y = last_motion_y;
1ae4518d
DC
672 last_motion_x = motion_x[0];
673 last_motion_y = motion_y[0];
674 }
675 break;
676
677 case MODE_INTER_FOURMV:
678 /* vector maintenance */
679 prior_last_motion_x = last_motion_x;
680 prior_last_motion_y = last_motion_y;
681
682 /* fetch 4 vectors from the bitstream, one for each
683 * Y fragment, then average for the C fragment vectors */
1ae4518d 684 for (k = 0; k < 4; k++) {
57783884 685 current_fragment = BLOCK_Y*s->fragment_width[0] + BLOCK_X;
eb691ef2 686 if (s->all_fragments[current_fragment].coding_method != MODE_COPY) {
1ae4518d
DC
687 if (coding_mode == 0) {
688 motion_x[k] = motion_vector_table[get_vlc2(gb, s->motion_vector_vlc.table, 6, 2)];
689 motion_y[k] = motion_vector_table[get_vlc2(gb, s->motion_vector_vlc.table, 6, 2)];
feaf1a73 690 } else {
1ae4518d
DC
691 motion_x[k] = fixed_motion_vector_table[get_bits(gb, 6)];
692 motion_y[k] = fixed_motion_vector_table[get_bits(gb, 6)];
feaf1a73 693 }
1ae4518d
DC
694 last_motion_x = motion_x[k];
695 last_motion_y = motion_y[k];
696 } else {
697 motion_x[k] = 0;
698 motion_y[k] = 0;
d86053a4 699 }
1ae4518d 700 }
1ae4518d
DC
701 break;
702
703 case MODE_INTER_LAST_MV:
704 /* all 6 fragments use the last motion vector */
705 motion_x[0] = last_motion_x;
706 motion_y[0] = last_motion_y;
d86053a4 707
1ae4518d
DC
708 /* no vector maintenance (last vector remains the
709 * last vector) */
710 break;
711
712 case MODE_INTER_PRIOR_LAST:
713 /* all 6 fragments use the motion vector prior to the
714 * last motion vector */
715 motion_x[0] = prior_last_motion_x;
716 motion_y[0] = prior_last_motion_y;
d86053a4 717
1ae4518d
DC
718 /* vector maintenance */
719 prior_last_motion_x = last_motion_x;
720 prior_last_motion_y = last_motion_y;
721 last_motion_x = motion_x[0];
722 last_motion_y = motion_y[0];
723 break;
44ae98dd 724
1ae4518d
DC
725 default:
726 /* covers intra, inter without MV, golden without MV */
e6e32bdc
MM
727 motion_x[0] = 0;
728 motion_y[0] = 0;
44ae98dd 729
1ae4518d
DC
730 /* no vector maintenance */
731 break;
732 }
d86053a4 733
1ae4518d 734 /* assign the motion vectors to the correct fragments */
ea676144 735 for (k = 0; k < 4; k++) {
1ae4518d 736 current_fragment =
57783884 737 BLOCK_Y*s->fragment_width[0] + BLOCK_X;
e6e32bdc 738 if (s->macroblock_coding[current_macroblock] == MODE_INTER_FOURMV) {
14268254
DC
739 s->motion_val[0][current_fragment][0] = motion_x[k];
740 s->motion_val[0][current_fragment][1] = motion_y[k];
e6e32bdc 741 } else {
14268254
DC
742 s->motion_val[0][current_fragment][0] = motion_x[0];
743 s->motion_val[0][current_fragment][1] = motion_y[0];
e6e32bdc 744 }
d86053a4 745 }
1e76a1da 746
1e76a1da 747 if (s->chroma_y_shift) {
1c183aa4
DC
748 if (s->macroblock_coding[current_macroblock] == MODE_INTER_FOURMV) {
749 motion_x[0] = RSHIFT(motion_x[0] + motion_x[1] + motion_x[2] + motion_x[3], 2);
750 motion_y[0] = RSHIFT(motion_y[0] + motion_y[1] + motion_y[2] + motion_y[3], 2);
751 }
1e76a1da
DC
752 motion_x[0] = (motion_x[0]>>1) | (motion_x[0]&1);
753 motion_y[0] = (motion_y[0]>>1) | (motion_y[0]&1);
14268254
DC
754 frag = mb_y*s->fragment_width[1] + mb_x;
755 s->motion_val[1][frag][0] = motion_x[0];
756 s->motion_val[1][frag][1] = motion_y[0];
1e76a1da
DC
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
14268254 770 frag = 2*mb_y*s->fragment_width[1] + mb_x;
1e76a1da 771 for (k = 0; k < 2; k++) {
14268254
DC
772 s->motion_val[1][frag][0] = motion_x[k];
773 s->motion_val[1][frag][1] = motion_y[k];
1e76a1da
DC
774 frag += s->fragment_width[1];
775 }
776 } else {
777 for (k = 0; k < 4; k++) {
14268254 778 frag = BLOCK_Y*s->fragment_width[1] + BLOCK_X;
1e76a1da 779 if (s->macroblock_coding[current_macroblock] == MODE_INTER_FOURMV) {
14268254
DC
780 s->motion_val[1][frag][0] = motion_x[k];
781 s->motion_val[1][frag][1] = motion_y[k];
1e76a1da 782 } else {
14268254
DC
783 s->motion_val[1][frag][0] = motion_x[0];
784 s->motion_val[1][frag][1] = motion_y[0];
1e76a1da
DC
785 }
786 }
ea676144 787 }
d86053a4 788 }
19cd517d 789 }
1ae4518d 790 }
892fc83e
MM
791
792 return 0;
d86053a4
MM
793}
794
f2264fa5
DC
795static int unpack_block_qpis(Vp3DecodeContext *s, GetBitContext *gb)
796{
797 int qpi, i, j, bit, run_length, blocks_decoded, num_blocks_at_qpi;
c72625f2 798 int num_blocks = s->total_num_coded_frags;
f2264fa5
DC
799
800 for (qpi = 0; qpi < s->nqps-1 && num_blocks > 0; qpi++) {
801 i = blocks_decoded = num_blocks_at_qpi = 0;
802
803 bit = get_bits1(gb);
804
805 do {
806 run_length = get_vlc2(gb, s->superblock_run_length_vlc.table, 6, 2) + 1;
807 if (run_length == 34)
808 run_length += get_bits(gb, 12);
809 blocks_decoded += run_length;
810
811 if (!bit)
812 num_blocks_at_qpi += run_length;
813
814 for (j = 0; j < run_length; i++) {
c72625f2 815 if (i >= s->total_num_coded_frags)
f2264fa5
DC
816 return -1;
817
c72625f2
DC
818 if (s->all_fragments[s->coded_fragment_list[0][i]].qpi == qpi) {
819 s->all_fragments[s->coded_fragment_list[0][i]].qpi += bit;
f2264fa5
DC
820 j++;
821 }
822 }
823
ecb51b25 824 if (run_length == MAXIMUM_LONG_BIT_RUN)
f2264fa5
DC
825 bit = get_bits1(gb);
826 else
827 bit ^= 1;
60867312 828 } while (blocks_decoded < num_blocks && get_bits_left(gb) > 0);
f2264fa5
DC
829
830 num_blocks -= num_blocks_at_qpi;
831 }
832
833 return 0;
834}
835
115329f1 836/*
d86053a4
MM
837 * This function is called by unpack_dct_coeffs() to extract the VLCs from
838 * the bitstream. The VLCs encode tokens which are used to unpack DCT
839 * data. This function unpacks all the VLCs for either the Y plane or both
840 * C planes, and is called for DC coefficients or different AC coefficient
841 * levels (since different coefficient types require different VLC tables.
842 *
843 * This function returns a residual eob run. E.g, if a particular token gave
844 * instructions to EOB the next 5 fragments and there were only 2 fragments
845 * left in the current fragment range, 3 would be returned so that it could
846 * be passed into the next call to this same function.
847 */
848static int unpack_vlcs(Vp3DecodeContext *s, GetBitContext *gb,
849 VLC *table, int coeff_index,
c72625f2 850 int plane,
d86053a4
MM
851 int eob_run)
852{
c72625f2 853 int i, j = 0;
d86053a4 854 int token;
d3076955
MM
855 int zero_run = 0;
856 DCTELEM coeff = 0;
d3076955 857 int bits_to_get;
c72625f2
DC
858 int blocks_ended;
859 int coeff_i = 0;
860 int num_coeffs = s->num_coded_frags[plane][coeff_index];
861 int16_t *dct_tokens = s->dct_tokens[plane][coeff_index];
d86053a4 862
ee3d7f58 863 /* local references to structure members to avoid repeated deferences */
c72625f2 864 int *coded_fragment_list = s->coded_fragment_list[plane];
ee3d7f58 865 Vp3Fragment *all_fragments = s->all_fragments;
ee3d7f58
MM
866 VLC_TYPE (*vlc_table)[2] = table->table;
867
c72625f2
DC
868 if (num_coeffs < 0)
869 av_log(s->avctx, AV_LOG_ERROR, "Invalid number of coefficents at level %d\n", coeff_index);
870
871 if (eob_run > num_coeffs) {
872 coeff_i = blocks_ended = num_coeffs;
873 eob_run -= num_coeffs;
098523eb 874 } else {
c72625f2
DC
875 coeff_i = blocks_ended = eob_run;
876 eob_run = 0;
74c0ac12
MM
877 }
878
c72625f2
DC
879 // insert fake EOB token to cover the split between planes or zzi
880 if (blocks_ended)
881 dct_tokens[j++] = blocks_ended << 2;
d86053a4 882
f50dafa8 883 while (coeff_i < num_coeffs && get_bits_left(gb) > 0) {
d86053a4 884 /* decode a VLC into a token */
ee3d7f58 885 token = get_vlc2(gb, vlc_table, 5, 3);
d86053a4 886 /* use the token to get a zero run, a coefficient, and an eob run */
d3076955
MM
887 if (token <= 6) {
888 eob_run = eob_run_base[token];
889 if (eob_run_get_bits[token])
890 eob_run += get_bits(gb, eob_run_get_bits[token]);
c72625f2
DC
891
892 // record only the number of blocks ended in this plane,
893 // any spill will be recorded in the next plane.
894 if (eob_run > num_coeffs - coeff_i) {
895 dct_tokens[j++] = TOKEN_EOB(num_coeffs - coeff_i);
896 blocks_ended += num_coeffs - coeff_i;
897 eob_run -= num_coeffs - coeff_i;
898 coeff_i = num_coeffs;
899 } else {
900 dct_tokens[j++] = TOKEN_EOB(eob_run);
901 blocks_ended += eob_run;
902 coeff_i += eob_run;
903 eob_run = 0;
904 }
d3076955
MM
905 } else {
906 bits_to_get = coeff_get_bits[token];
428984b0
MM
907 if (bits_to_get)
908 bits_to_get = get_bits(gb, bits_to_get);
909 coeff = coeff_tables[token][bits_to_get];
d3076955
MM
910
911 zero_run = zero_run_base[token];
912 if (zero_run_get_bits[token])
913 zero_run += get_bits(gb, zero_run_get_bits[token]);
d86053a4 914
c72625f2
DC
915 if (zero_run) {
916 dct_tokens[j++] = TOKEN_ZERO_RUN(coeff, zero_run);
917 } else {
918 // Save DC into the fragment structure. DC prediction is
919 // done in raster order, so the actual DC can't be in with
920 // other tokens. We still need the token in dct_tokens[]
921 // however, or else the structure collapses on itself.
922 if (!coeff_index)
923 all_fragments[coded_fragment_list[coeff_i]].dc = coeff;
924
925 dct_tokens[j++] = TOKEN_COEFF(coeff);
926 }
927
928 if (coeff_index + zero_run > 64) {
01f9640b 929 av_log(s->avctx, AV_LOG_DEBUG, "Invalid zero run of %d with"
c72625f2
DC
930 " %d coeffs left\n", zero_run, 64-coeff_index);
931 zero_run = 64 - coeff_index;
932 }
098523eb 933
c72625f2
DC
934 // zero runs code multiple coefficients,
935 // so don't try to decode coeffs for those higher levels
936 for (i = coeff_index+1; i <= coeff_index+zero_run; i++)
937 s->num_coded_frags[plane][i]--;
938 coeff_i++;
939 }
d86053a4
MM
940 }
941
c72625f2
DC
942 if (blocks_ended > s->num_coded_frags[plane][coeff_index])
943 av_log(s->avctx, AV_LOG_ERROR, "More blocks ended than coded!\n");
944
945 // decrement the number of blocks that have higher coeffecients for each
946 // EOB run at this level
947 if (blocks_ended)
948 for (i = coeff_index+1; i < 64; i++)
949 s->num_coded_frags[plane][i] -= blocks_ended;
950
951 // setup the next buffer
952 if (plane < 2)
953 s->dct_tokens[plane+1][coeff_index] = dct_tokens + j;
954 else if (coeff_index < 63)
955 s->dct_tokens[0][coeff_index+1] = dct_tokens + j;
956
d86053a4
MM
957 return eob_run;
958}
959
138fe832
MM
960static void reverse_dc_prediction(Vp3DecodeContext *s,
961 int first_fragment,
962 int fragment_width,
963 int fragment_height);
d86053a4
MM
964/*
965 * This function unpacks all of the DCT coefficient data from the
966 * bitstream.
967 */
892fc83e 968static int unpack_dct_coeffs(Vp3DecodeContext *s, GetBitContext *gb)
d86053a4
MM
969{
970 int i;
971 int dc_y_table;
972 int dc_c_table;
973 int ac_y_table;
974 int ac_c_table;
975 int residual_eob_run = 0;
9d8bb031
MM
976 VLC *y_tables[64];
977 VLC *c_tables[64];
d86053a4 978
c72625f2
DC
979 s->dct_tokens[0][0] = s->dct_tokens_base;
980
f4433de9 981 /* fetch the DC table indexes */
d86053a4
MM
982 dc_y_table = get_bits(gb, 4);
983 dc_c_table = get_bits(gb, 4);
984
985 /* unpack the Y plane DC coefficients */
115329f1 986 residual_eob_run = unpack_vlcs(s, gb, &s->dc_vlc[dc_y_table], 0,
c72625f2 987 0, residual_eob_run);
d86053a4 988
138fe832 989 /* reverse prediction of the Y-plane DC coefficients */
57783884 990 reverse_dc_prediction(s, 0, s->fragment_width[0], s->fragment_height[0]);
138fe832 991
d86053a4 992 /* unpack the C plane DC coefficients */
d86053a4 993 residual_eob_run = unpack_vlcs(s, gb, &s->dc_vlc[dc_c_table], 0,
c72625f2
DC
994 1, residual_eob_run);
995 residual_eob_run = unpack_vlcs(s, gb, &s->dc_vlc[dc_c_table], 0,
996 2, residual_eob_run);
d86053a4 997
138fe832
MM
998 /* reverse prediction of the C-plane DC coefficients */
999 if (!(s->avctx->flags & CODEC_FLAG_GRAY))
1000 {
1001 reverse_dc_prediction(s, s->fragment_start[1],
57783884 1002 s->fragment_width[1], s->fragment_height[1]);
138fe832 1003 reverse_dc_prediction(s, s->fragment_start[2],
57783884 1004 s->fragment_width[1], s->fragment_height[1]);
138fe832
MM
1005 }
1006
f4433de9 1007 /* fetch the AC table indexes */
d86053a4
MM
1008 ac_y_table = get_bits(gb, 4);
1009 ac_c_table = get_bits(gb, 4);
1010
9d8bb031 1011 /* build tables of AC VLC tables */
d86053a4 1012 for (i = 1; i <= 5; i++) {
9d8bb031
MM
1013 y_tables[i] = &s->ac_vlc_1[ac_y_table];
1014 c_tables[i] = &s->ac_vlc_1[ac_c_table];
d86053a4 1015 }
d86053a4 1016 for (i = 6; i <= 14; i++) {
9d8bb031
MM
1017 y_tables[i] = &s->ac_vlc_2[ac_y_table];
1018 c_tables[i] = &s->ac_vlc_2[ac_c_table];
d86053a4 1019 }
d86053a4 1020 for (i = 15; i <= 27; i++) {
9d8bb031
MM
1021 y_tables[i] = &s->ac_vlc_3[ac_y_table];
1022 c_tables[i] = &s->ac_vlc_3[ac_c_table];
d86053a4 1023 }
d86053a4 1024 for (i = 28; i <= 63; i++) {
9d8bb031
MM
1025 y_tables[i] = &s->ac_vlc_4[ac_y_table];
1026 c_tables[i] = &s->ac_vlc_4[ac_c_table];
1027 }
1028
1029 /* decode all AC coefficents */
1030 for (i = 1; i <= 63; i++) {
9d8bb031 1031 residual_eob_run = unpack_vlcs(s, gb, y_tables[i], i,
c72625f2 1032 0, residual_eob_run);
d86053a4 1033
9d8bb031 1034 residual_eob_run = unpack_vlcs(s, gb, c_tables[i], i,
c72625f2
DC
1035 1, residual_eob_run);
1036 residual_eob_run = unpack_vlcs(s, gb, c_tables[i], i,
1037 2, residual_eob_run);
d86053a4 1038 }
892fc83e
MM
1039
1040 return 0;
d86053a4
MM
1041}
1042
1043/*
1044 * This function reverses the DC prediction for each coded fragment in
115329f1 1045 * the frame. Much of this function is adapted directly from the original
d86053a4
MM
1046 * VP3 source code.
1047 */
1048#define COMPATIBLE_FRAME(x) \
1049 (compatible_frame[s->all_fragments[x].coding_method] == current_frame_type)
c72625f2 1050#define DC_COEFF(u) s->all_fragments[u].dc
d86053a4
MM
1051
1052static void reverse_dc_prediction(Vp3DecodeContext *s,
1053 int first_fragment,
1054 int fragment_width,
115329f1 1055 int fragment_height)
d86053a4
MM
1056{
1057
1058#define PUL 8
1059#define PU 4
1060#define PUR 2
1061#define PL 1
1062
1063 int x, y;
1064 int i = first_fragment;
1065
59ef342b 1066 int predicted_dc;
d86053a4 1067
d86053a4
MM
1068 /* DC values for the left, up-left, up, and up-right fragments */
1069 int vl, vul, vu, vur;
1070
f4433de9 1071 /* indexes for the left, up-left, up, and up-right fragments */
d86053a4
MM
1072 int l, ul, u, ur;
1073
115329f1 1074 /*
d86053a4
MM
1075 * The 6 fields mean:
1076 * 0: up-left multiplier
1077 * 1: up multiplier
1078 * 2: up-right multiplier
1079 * 3: left multiplier
d86053a4 1080 */
bb991087 1081 static const int predictor_transform[16][4] = {
006ff1ca
MN
1082 { 0, 0, 0, 0},
1083 { 0, 0, 0,128}, // PL
1084 { 0, 0,128, 0}, // PUR
1085 { 0, 0, 53, 75}, // PUR|PL
1086 { 0,128, 0, 0}, // PU
1087 { 0, 64, 0, 64}, // PU|PL
1088 { 0,128, 0, 0}, // PU|PUR
1089 { 0, 0, 53, 75}, // PU|PUR|PL
1090 {128, 0, 0, 0}, // PUL
1091 { 0, 0, 0,128}, // PUL|PL
1092 { 64, 0, 64, 0}, // PUL|PUR
1093 { 0, 0, 53, 75}, // PUL|PUR|PL
1094 { 0,128, 0, 0}, // PUL|PU
1095 {-104,116, 0,116}, // PUL|PU|PL
1096 { 24, 80, 24, 0}, // PUL|PU|PUR
1097 {-104,116, 0,116} // PUL|PU|PUR|PL
d86053a4
MM
1098 };
1099
1100 /* This table shows which types of blocks can use other blocks for
1101 * prediction. For example, INTRA is the only mode in this table to
1102 * have a frame number of 0. That means INTRA blocks can only predict
115329f1 1103 * from other INTRA blocks. There are 2 golden frame coding types;
d86053a4
MM
1104 * blocks encoding in these modes can only predict from other blocks
1105 * that were encoded with these 1 of these 2 modes. */
50ba3fd7 1106 static const unsigned char compatible_frame[9] = {
d86053a4
MM
1107 1, /* MODE_INTER_NO_MV */
1108 0, /* MODE_INTRA */
1109 1, /* MODE_INTER_PLUS_MV */
1110 1, /* MODE_INTER_LAST_MV */
1111 1, /* MODE_INTER_PRIOR_MV */
1112 2, /* MODE_USING_GOLDEN */
1113 2, /* MODE_GOLDEN_MV */
50ba3fd7
JGG
1114 1, /* MODE_INTER_FOUR_MV */
1115 3 /* MODE_COPY */
d86053a4
MM
1116 };
1117 int current_frame_type;
1118
1119 /* there is a last DC predictor for each of the 3 frame types */
1120 short last_dc[3];
1121
1122 int transform = 0;
1123
d86053a4
MM
1124 vul = vu = vur = vl = 0;
1125 last_dc[0] = last_dc[1] = last_dc[2] = 0;
1126
1127 /* for each fragment row... */
1128 for (y = 0; y < fragment_height; y++) {
1129
1130 /* for each fragment in a row... */
1131 for (x = 0; x < fragment_width; x++, i++) {
1132
1133 /* reverse prediction if this block was coded */
1134 if (s->all_fragments[i].coding_method != MODE_COPY) {
1135
115329f1 1136 current_frame_type =
d86053a4 1137 compatible_frame[s->all_fragments[i].coding_method];
d86053a4 1138
f72f8a77
MN
1139 transform= 0;
1140 if(x){
1141 l= i-1;
7beddb12 1142 vl = DC_COEFF(l);
50ba3fd7 1143 if(COMPATIBLE_FRAME(l))
006ff1ca 1144 transform |= PL;
f72f8a77
MN
1145 }
1146 if(y){
1147 u= i-fragment_width;
7beddb12 1148 vu = DC_COEFF(u);
50ba3fd7 1149 if(COMPATIBLE_FRAME(u))
006ff1ca 1150 transform |= PU;
f72f8a77
MN
1151 if(x){
1152 ul= i-fragment_width-1;
1153 vul = DC_COEFF(ul);
50ba3fd7 1154 if(COMPATIBLE_FRAME(ul))
006ff1ca 1155 transform |= PUL;
f72f8a77
MN
1156 }
1157 if(x + 1 < fragment_width){
1158 ur= i-fragment_width+1;
1159 vur = DC_COEFF(ur);
50ba3fd7 1160 if(COMPATIBLE_FRAME(ur))
006ff1ca 1161 transform |= PUR;
f72f8a77 1162 }
d86053a4
MM
1163 }
1164
d86053a4
MM
1165 if (transform == 0) {
1166
1167 /* if there were no fragments to predict from, use last
1168 * DC saved */
7beddb12 1169 predicted_dc = last_dc[current_frame_type];
d86053a4
MM
1170 } else {
1171
1172 /* apply the appropriate predictor transform */
1173 predicted_dc =
1174 (predictor_transform[transform][0] * vul) +
1175 (predictor_transform[transform][1] * vu) +
1176 (predictor_transform[transform][2] * vur) +
1177 (predictor_transform[transform][3] * vl);
1178
684d9e36 1179 predicted_dc /= 128;
d86053a4
MM
1180
1181 /* check for outranging on the [ul u l] and
1182 * [ul u ur l] predictors */
c11cb375 1183 if ((transform == 15) || (transform == 13)) {
c26abfa5 1184 if (FFABS(predicted_dc - vu) > 128)
d86053a4 1185 predicted_dc = vu;
c26abfa5 1186 else if (FFABS(predicted_dc - vl) > 128)
d86053a4 1187 predicted_dc = vl;
c26abfa5 1188 else if (FFABS(predicted_dc - vul) > 128)
d86053a4
MM
1189 predicted_dc = vul;
1190 }
d86053a4
MM
1191 }
1192
7beddb12 1193 /* at long last, apply the predictor */
c72625f2 1194 DC_COEFF(i) += predicted_dc;
d86053a4 1195 /* save the DC */
7beddb12 1196 last_dc[current_frame_type] = DC_COEFF(i);
d86053a4
MM
1197 }
1198 }
1199 }
1200}
1201
256c0662 1202static void apply_loop_filter(Vp3DecodeContext *s, int plane, int ystart, int yend)
fe313556 1203{
fe313556
DC
1204 int x, y;
1205 int *bounding_values= s->bounding_values_array+127;
1206
57783884
DC
1207 int width = s->fragment_width[!!plane];
1208 int height = s->fragment_height[!!plane];
621f9a40
DC
1209 int fragment = s->fragment_start [plane] + ystart * width;
1210 int stride = s->current_frame.linesize[plane];
1211 uint8_t *plane_data = s->current_frame.data [plane];
1212 if (!s->flipped_image) stride = -stride;
735acf56 1213 plane_data += s->data_offset[plane] + 8*ystart*stride;
621f9a40
DC
1214
1215 for (y = ystart; y < yend; y++) {
1216
1217 for (x = 0; x < width; x++) {
1218 /* This code basically just deblocks on the edges of coded blocks.
1219 * However, it has to be much more complicated because of the
1220 * braindamaged deblock ordering used in VP3/Theora. Order matters
1221 * because some pixels get filtered twice. */
1222 if( s->all_fragments[fragment].coding_method != MODE_COPY )
1223 {
1224 /* do not perform left edge filter for left columns frags */
1225 if (x > 0) {
1226 s->dsp.vp3_h_loop_filter(
735acf56 1227 plane_data + 8*x,
621f9a40
DC
1228 stride, bounding_values);
1229 }
fe313556 1230
621f9a40
DC
1231 /* do not perform top edge filter for top row fragments */
1232 if (y > 0) {
1233 s->dsp.vp3_v_loop_filter(
735acf56 1234 plane_data + 8*x,
621f9a40
DC
1235 stride, bounding_values);
1236 }
fe313556 1237
621f9a40
DC
1238 /* do not perform right edge filter for right column
1239 * fragments or if right fragment neighbor is also coded
1240 * in this frame (it will be filtered in next iteration) */
1241 if ((x < width - 1) &&
1242 (s->all_fragments[fragment + 1].coding_method == MODE_COPY)) {
1243 s->dsp.vp3_h_loop_filter(
735acf56 1244 plane_data + 8*x + 8,
621f9a40 1245 stride, bounding_values);
fe313556
DC
1246 }
1247
621f9a40
DC
1248 /* do not perform bottom edge filter for bottom row
1249 * fragments or if bottom fragment neighbor is also coded
1250 * in this frame (it will be filtered in the next row) */
1251 if ((y < height - 1) &&
1252 (s->all_fragments[fragment + width].coding_method == MODE_COPY)) {
1253 s->dsp.vp3_v_loop_filter(
735acf56 1254 plane_data + 8*x + 8*stride,
621f9a40
DC
1255 stride, bounding_values);
1256 }
fe313556 1257 }
621f9a40
DC
1258
1259 fragment++;
fe313556 1260 }
735acf56 1261 plane_data += 8*stride;
621f9a40 1262 }
fe313556
DC
1263}
1264
a8de3901 1265/**
c72625f2
DC
1266 * Pulls DCT tokens from the 64 levels to decode and dequant the coefficients
1267 * for the next block in coding order
1268 */
1269static inline int vp3_dequant(Vp3DecodeContext *s, Vp3Fragment *frag,
1270 int plane, int inter, DCTELEM block[64])
1271{
1272 int16_t *dequantizer = s->qmat[frag->qpi][inter][plane];
1273 uint8_t *perm = s->scantable.permutated;
1274 int i = 0;
1275
1276 do {
1277 int token = *s->dct_tokens[plane][i];
1278 switch (token & 3) {
1279 case 0: // EOB
1280 if (--token < 4) // 0-3 are token types, so the EOB run must now be 0
1281 s->dct_tokens[plane][i]++;
1282 else
1283 *s->dct_tokens[plane][i] = token & ~3;
1284 goto end;
1285 case 1: // zero run
1286 s->dct_tokens[plane][i]++;
1287 i += (token >> 2) & 0x7f;
1288 block[perm[i]] = (token >> 9) * dequantizer[perm[i]];
1289 i++;
1290 break;
1291 case 2: // coeff
1292 block[perm[i]] = (token >> 2) * dequantizer[perm[i]];
1293 s->dct_tokens[plane][i++]++;
1294 break;
d7097c2d 1295 default: // shouldn't happen
c72625f2
DC
1296 return i;
1297 }
1298 } while (i < 64);
1299end:
1300 // the actual DC+prediction is in the fragment structure
1301 block[0] = frag->dc * s->qmat[0][inter][plane][0];
1302 return i;
1303}
1304
1305/**
a8de3901
DC
1306 * called when all pixels up to row y are complete
1307 */
1308static void vp3_draw_horiz_band(Vp3DecodeContext *s, int y)
1309{
1310 int h, cy;
1311 int offset[4];
1312
1313 if(s->avctx->draw_horiz_band==NULL)
1314 return;
1315
1316 h= y - s->last_slice_end;
1317 y -= h;
1318
1319 if (!s->flipped_image) {
1320 if (y == 0)
1321 h -= s->height - s->avctx->height; // account for non-mod16
1322 y = s->height - y - h;
1323 }
1324
1325 cy = y >> 1;
1326 offset[0] = s->current_frame.linesize[0]*y;
1327 offset[1] = s->current_frame.linesize[1]*cy;
1328 offset[2] = s->current_frame.linesize[2]*cy;
1329 offset[3] = 0;
1330
1331 emms_c();
1332 s->avctx->draw_horiz_band(s->avctx, &s->current_frame, offset, y, 3, h);
1333 s->last_slice_end= y + h;
1334}
1335
d86053a4 1336/*
dc4b78d9 1337 * Perform the final rendering for a particular slice of data.
7a095ea6 1338 * The slice number ranges from 0..(c_superblock_height - 1).
dc4b78d9
MM
1339 */
1340static void render_slice(Vp3DecodeContext *s, int slice)
1341{
7a095ea6 1342 int x, y, i, j;
40d11227 1343 LOCAL_ALIGNED_16(DCTELEM, block, [64]);
dc4b78d9 1344 int motion_x = 0xdeadbeef, motion_y = 0xdeadbeef;
dc4b78d9
MM
1345 int motion_halfpel_index;
1346 uint8_t *motion_source;
7a095ea6 1347 int plane, first_pixel;
dc4b78d9 1348
7a095ea6 1349 if (slice >= s->c_superblock_height)
dc4b78d9
MM
1350 return;
1351
1352 for (plane = 0; plane < 3; plane++) {
735acf56
DC
1353 uint8_t *output_plane = s->current_frame.data [plane] + s->data_offset[plane];
1354 uint8_t * last_plane = s-> last_frame.data [plane] + s->data_offset[plane];
1355 uint8_t *golden_plane = s-> golden_frame.data [plane] + s->data_offset[plane];
1abbf64e 1356 int stride = s->current_frame.linesize[plane];
1e76a1da
DC
1357 int plane_width = s->width >> (plane && s->chroma_x_shift);
1358 int plane_height = s->height >> (plane && s->chroma_y_shift);
14268254 1359 int8_t (*motion_val)[2] = s->motion_val[!!plane];
7a095ea6 1360
1e76a1da
DC
1361 int sb_x, sb_y = slice << (!plane && s->chroma_y_shift);
1362 int slice_height = sb_y + 1 + (!plane && s->chroma_y_shift);
7a095ea6
DC
1363 int slice_width = plane ? s->c_superblock_width : s->y_superblock_width;
1364
57783884
DC
1365 int fragment_width = s->fragment_width[!!plane];
1366 int fragment_height = s->fragment_height[!!plane];
7a095ea6 1367 int fragment_start = s->fragment_start[plane];
1abbf64e
MN
1368
1369 if (!s->flipped_image) stride = -stride;
161e8cf4
DC
1370 if (CONFIG_GRAY && plane && (s->avctx->flags & CODEC_FLAG_GRAY))
1371 continue;
dc4b78d9 1372
115329f1 1373
c26abfa5 1374 if(FFABS(stride) > 2048)
dc4b78d9
MM
1375 return; //various tables are fixed size
1376
7a095ea6
DC
1377 /* for each superblock row in the slice (both of them)... */
1378 for (; sb_y < slice_height; sb_y++) {
dc4b78d9 1379
7a095ea6
DC
1380 /* for each superblock in a row... */
1381 for (sb_x = 0; sb_x < slice_width; sb_x++) {
dc4b78d9 1382
7a095ea6
DC
1383 /* for each block in a superblock... */
1384 for (j = 0; j < 16; j++) {
1385 x = 4*sb_x + hilbert_offset[j][0];
1386 y = 4*sb_y + hilbert_offset[j][1];
1387
1388 i = fragment_start + y*fragment_width + x;
1389
1390 // bounds check
1391 if (x >= fragment_width || y >= fragment_height)
1392 continue;
1393
1394 first_pixel = 8*y*stride + 8*x;
dc4b78d9
MM
1395
1396 /* transform if this block was coded */
161e8cf4 1397 if (s->all_fragments[i].coding_method != MODE_COPY) {
dc4b78d9
MM
1398 if ((s->all_fragments[i].coding_method == MODE_USING_GOLDEN) ||
1399 (s->all_fragments[i].coding_method == MODE_GOLDEN_MV))
1400 motion_source= golden_plane;
115329f1 1401 else
dc4b78d9
MM
1402 motion_source= last_plane;
1403
735acf56 1404 motion_source += first_pixel;
dc4b78d9
MM
1405 motion_halfpel_index = 0;
1406
1407 /* sort out the motion vector if this fragment is coded
1408 * using a motion vector method */
1409 if ((s->all_fragments[i].coding_method > MODE_INTRA) &&
1410 (s->all_fragments[i].coding_method != MODE_USING_GOLDEN)) {
1411 int src_x, src_y;
14268254
DC
1412 motion_x = motion_val[y*fragment_width + x][0];
1413 motion_y = motion_val[y*fragment_width + x][1];
dc4b78d9 1414
7a095ea6
DC
1415 src_x= (motion_x>>1) + 8*x;
1416 src_y= (motion_y>>1) + 8*y;
dc4b78d9
MM
1417
1418 motion_halfpel_index = motion_x & 0x01;
1419 motion_source += (motion_x >> 1);
1420
1421 motion_halfpel_index |= (motion_y & 0x01) << 1;
1422 motion_source += ((motion_y >> 1) * stride);
1423
1424 if(src_x<0 || src_y<0 || src_x + 9 >= plane_width || src_y + 9 >= plane_height){
1425 uint8_t *temp= s->edge_emu_buffer;
1426 if(stride<0) temp -= 9*stride;
1427 else temp += 9*stride;
1428
1429 ff_emulated_edge_mc(temp, motion_source, stride, 9, 9, src_x, src_y, plane_width, plane_height);
1430 motion_source= temp;
1431 }
1432 }
115329f1 1433
dc4b78d9
MM
1434
1435 /* first, take care of copying a block from either the
1436 * previous or the golden frame */
1437 if (s->all_fragments[i].coding_method != MODE_INTRA) {
115329f1
DB
1438 /* Note, it is possible to implement all MC cases with
1439 put_no_rnd_pixels_l2 which would look more like the
1440 VP3 source but this would be slower as
dc4b78d9
MM
1441 put_no_rnd_pixels_tab is better optimzed */
1442 if(motion_halfpel_index != 3){
1443 s->dsp.put_no_rnd_pixels_tab[1][motion_halfpel_index](
735acf56 1444 output_plane + first_pixel,
dc4b78d9
MM
1445 motion_source, stride, 8);
1446 }else{
1447 int d= (motion_x ^ motion_y)>>31; // d is 0 if motion_x and _y have the same sign, else -1
1448 s->dsp.put_no_rnd_pixels_l2[1](
735acf56 1449 output_plane + first_pixel,
115329f1
DB
1450 motion_source - d,
1451 motion_source + stride + 1 + d,
dc4b78d9
MM
1452 stride, 8);
1453 }
dc4b78d9
MM
1454 }
1455
5fecfb7d 1456 s->dsp.clear_block(block);
dc4b78d9
MM
1457
1458 /* invert DCT and place (or add) in final output */
115329f1 1459
dc4b78d9 1460 if (s->all_fragments[i].coding_method == MODE_INTRA) {
eb6a6cd7 1461 vp3_dequant(s, s->all_fragments + i, plane, 0, block);
dc4b78d9
MM
1462 if(s->avctx->idct_algo!=FF_IDCT_VP3)
1463 block[0] += 128<<3;
1464 s->dsp.idct_put(
735acf56 1465 output_plane + first_pixel,
dc4b78d9
MM
1466 stride,
1467 block);
1468 } else {
eb6a6cd7 1469 if (vp3_dequant(s, s->all_fragments + i, plane, 1, block)) {
dc4b78d9 1470 s->dsp.idct_add(
735acf56 1471 output_plane + first_pixel,
dc4b78d9
MM
1472 stride,
1473 block);
eb6a6cd7
DC
1474 } else {
1475 s->dsp.vp3_idct_dc_add(output_plane + first_pixel, stride, block);
1476 }
dc4b78d9 1477 }
dc4b78d9
MM
1478 } else {
1479
1480 /* copy directly from the previous frame */
1481 s->dsp.put_pixels_tab[1][0](
735acf56
DC
1482 output_plane + first_pixel,
1483 last_plane + first_pixel,
dc4b78d9
MM
1484 stride, 8);
1485
1486 }
7a095ea6 1487 }
dc4b78d9 1488 }
7a095ea6
DC
1489
1490 // Filter up to the last row in the superblock row
1491 apply_loop_filter(s, plane, 4*sb_y - !!sb_y, FFMIN(4*sb_y+3, fragment_height-1));
dc4b78d9
MM
1492 }
1493 }
1494
dc4b78d9
MM
1495 /* this looks like a good place for slice dispatch... */
1496 /* algorithm:
dc4b78d9 1497 * if (slice == s->macroblock_height - 1)
f44b08a5
MM
1498 * dispatch (both last slice & 2nd-to-last slice);
1499 * else if (slice > 0)
1500 * dispatch (slice - 1);
dc4b78d9
MM
1501 */
1502
d63a7187 1503 vp3_draw_horiz_band(s, FFMIN(64*slice + 64-16, s->height-16));
dc4b78d9
MM
1504}
1505
115329f1 1506/*
d86053a4
MM
1507 * This is the ffmpeg/libavcodec API init function.
1508 */
98a6fff9 1509static av_cold int vp3_decode_init(AVCodecContext *avctx)
d86053a4
MM
1510{
1511 Vp3DecodeContext *s = avctx->priv_data;
ae1dd8e1 1512 int i, inter, plane;
892fc83e
MM
1513 int c_width;
1514 int c_height;
1e76a1da 1515 int y_fragment_count, c_fragment_count;
d86053a4 1516
3c3f113e 1517 if (avctx->codec_tag == MKTAG('V','P','3','0'))
bb270c08 1518 s->version = 0;
3c3f113e 1519 else
bb270c08 1520 s->version = 1;
3c3f113e 1521
d86053a4 1522 s->avctx = avctx;
ef516f73
DC
1523 s->width = FFALIGN(avctx->width, 16);
1524 s->height = FFALIGN(avctx->height, 16);
1e76a1da
DC
1525 if (avctx->pix_fmt == PIX_FMT_NONE)
1526 avctx->pix_fmt = PIX_FMT_YUV420P;
580a7465 1527 avctx->chroma_sample_location = AVCHROMA_LOC_CENTER;
8b6103da
MN
1528 if(avctx->idct_algo==FF_IDCT_AUTO)
1529 avctx->idct_algo=FF_IDCT_VP3;
d86053a4 1530 dsputil_init(&s->dsp, avctx);
115329f1 1531
36af0c95 1532 ff_init_scantable(s->dsp.idct_permutation, &s->scantable, ff_zigzag_direct);
d86053a4
MM
1533
1534 /* initialize to an impossible value which will force a recalculation
1535 * in the first frame decode */
f2264fa5
DC
1536 for (i = 0; i < 3; i++)
1537 s->qps[i] = -1;
d86053a4 1538
1e76a1da
DC
1539 avcodec_get_chroma_sub_sample(avctx->pix_fmt, &s->chroma_x_shift, &s->chroma_y_shift);
1540
892fc83e
MM
1541 s->y_superblock_width = (s->width + 31) / 32;
1542 s->y_superblock_height = (s->height + 31) / 32;
35c28d23 1543 s->y_superblock_count = s->y_superblock_width * s->y_superblock_height;
892fc83e
MM
1544
1545 /* work out the dimensions for the C planes */
1e76a1da
DC
1546 c_width = s->width >> s->chroma_x_shift;
1547 c_height = s->height >> s->chroma_y_shift;
892fc83e
MM
1548 s->c_superblock_width = (c_width + 31) / 32;
1549 s->c_superblock_height = (c_height + 31) / 32;
35c28d23 1550 s->c_superblock_count = s->c_superblock_width * s->c_superblock_height;
892fc83e 1551
35c28d23
DC
1552 s->superblock_count = s->y_superblock_count + (s->c_superblock_count * 2);
1553 s->u_superblock_start = s->y_superblock_count;
1554 s->v_superblock_start = s->u_superblock_start + s->c_superblock_count;
d86053a4
MM
1555 s->superblock_coding = av_malloc(s->superblock_count);
1556
1557 s->macroblock_width = (s->width + 15) / 16;
1558 s->macroblock_height = (s->height + 15) / 16;
1559 s->macroblock_count = s->macroblock_width * s->macroblock_height;
1560
57783884
DC
1561 s->fragment_width[0] = s->width / FRAGMENT_PIXELS;
1562 s->fragment_height[0] = s->height / FRAGMENT_PIXELS;
1e76a1da
DC
1563 s->fragment_width[1] = s->fragment_width[0] >> s->chroma_x_shift;
1564 s->fragment_height[1] = s->fragment_height[0] >> s->chroma_y_shift;
d86053a4
MM
1565
1566 /* fragment count covers all 8x8 blocks for all 3 planes */
1e76a1da
DC
1567 y_fragment_count = s->fragment_width[0] * s->fragment_height[0];
1568 c_fragment_count = s->fragment_width[1] * s->fragment_height[1];
1569 s->fragment_count = y_fragment_count + 2*c_fragment_count;
1570 s->fragment_start[1] = y_fragment_count;
1571 s->fragment_start[2] = y_fragment_count + c_fragment_count;
d86053a4 1572
d86053a4 1573 s->all_fragments = av_malloc(s->fragment_count * sizeof(Vp3Fragment));
c72625f2
DC
1574 s->coded_fragment_list[0] = av_malloc(s->fragment_count * sizeof(int));
1575 s->dct_tokens_base = av_malloc(64*s->fragment_count * sizeof(*s->dct_tokens_base));
14268254
DC
1576 s->motion_val[0] = av_malloc(y_fragment_count * sizeof(*s->motion_val[0]));
1577 s->motion_val[1] = av_malloc(c_fragment_count * sizeof(*s->motion_val[1]));
1578
c72625f2 1579 if (!s->superblock_coding || !s->all_fragments || !s->dct_tokens_base ||
14268254 1580 !s->coded_fragment_list[0] || !s->motion_val[0] || !s->motion_val[1]) {
0efbd068
MM
1581 vp3_decode_end(avctx);
1582 return -1;
1583 }
d86053a4 1584
f44ee2c3
AB
1585 if (!s->theora_tables)
1586 {
2287c100 1587 for (i = 0; i < 64; i++) {
bb270c08 1588 s->coded_dc_scale_factor[i] = vp31_dc_scale_factor[i];
bb270c08 1589 s->coded_ac_scale_factor[i] = vp31_ac_scale_factor[i];
ae1dd8e1 1590 s->base_matrix[0][i] = vp31_intra_y_dequant[i];
ae1dd8e1 1591 s->base_matrix[1][i] = vp31_intra_c_dequant[i];
ae1dd8e1 1592 s->base_matrix[2][i] = vp31_inter_dequant[i];
bb270c08 1593 s->filter_limit_values[i] = vp31_filter_limit_values[i];
2287c100 1594 }
f44ee2c3 1595
ae1dd8e1
MN
1596 for(inter=0; inter<2; inter++){
1597 for(plane=0; plane<3; plane++){
1598 s->qr_count[inter][plane]= 1;
1599 s->qr_size [inter][plane][0]= 63;
1600 s->qr_base [inter][plane][0]=
1601 s->qr_base [inter][plane][1]= 2*inter + (!!plane)*!inter;
1602 }
1603 }
1604
39922395
MM
1605 /* init VLC tables */
1606 for (i = 0; i < 16; i++) {
1607
1608 /* DC histograms */
1609 init_vlc(&s->dc_vlc[i], 5, 32,
1610 &dc_bias[i][0][1], 4, 2,
1611 &dc_bias[i][0][0], 4, 2, 0);
1612
1613 /* group 1 AC histograms */
1614 init_vlc(&s->ac_vlc_1[i], 5, 32,
1615 &ac_bias_0[i][0][1], 4, 2,
1616 &ac_bias_0[i][0][0], 4, 2, 0);
1617
1618 /* group 2 AC histograms */
1619 init_vlc(&s->ac_vlc_2[i], 5, 32,
1620 &ac_bias_1[i][0][1], 4, 2,
1621 &ac_bias_1[i][0][0], 4, 2, 0);
1622
1623 /* group 3 AC histograms */
1624 init_vlc(&s->ac_vlc_3[i], 5, 32,
1625 &ac_bias_2[i][0][1], 4, 2,
1626 &ac_bias_2[i][0][0], 4, 2, 0);
1627
1628 /* group 4 AC histograms */
1629 init_vlc(&s->ac_vlc_4[i], 5, 32,
1630 &ac_bias_3[i][0][1], 4, 2,
1631 &ac_bias_3[i][0][0], 4, 2, 0);
1632 }
1633 } else {
1634 for (i = 0; i < 16; i++) {
1635
1636 /* DC histograms */
c4b7b8bf 1637 if (init_vlc(&s->dc_vlc[i], 5, 32,
39922395 1638 &s->huffman_table[i][0][1], 4, 2,
c4b7b8bf
RD
1639 &s->huffman_table[i][0][0], 4, 2, 0) < 0)
1640 goto vlc_fail;
39922395
MM
1641
1642 /* group 1 AC histograms */
c4b7b8bf 1643 if (init_vlc(&s->ac_vlc_1[i], 5, 32,
39922395 1644 &s->huffman_table[i+16][0][1], 4, 2,
c4b7b8bf
RD
1645 &s->huffman_table[i+16][0][0], 4, 2, 0) < 0)
1646 goto vlc_fail;
39922395
MM
1647
1648 /* group 2 AC histograms */
c4b7b8bf 1649 if (init_vlc(&s->ac_vlc_2[i], 5, 32,
39922395 1650 &s->huffman_table[i+16*2][0][1], 4, 2,
c4b7b8bf
RD
1651 &s->huffman_table[i+16*2][0][0], 4, 2, 0) < 0)
1652 goto vlc_fail;
39922395
MM
1653
1654 /* group 3 AC histograms */
c4b7b8bf 1655 if (init_vlc(&s->ac_vlc_3[i], 5, 32,
39922395 1656 &s->huffman_table[i+16*3][0][1], 4, 2,
c4b7b8bf
RD
1657 &s->huffman_table[i+16*3][0][0], 4, 2, 0) < 0)
1658 goto vlc_fail;
39922395
MM
1659
1660 /* group 4 AC histograms */
c4b7b8bf 1661 if (init_vlc(&s->ac_vlc_4[i], 5, 32,
39922395 1662 &s->huffman_table[i+16*4][0][1], 4, 2,
c4b7b8bf
RD
1663 &s->huffman_table[i+16*4][0][0], 4, 2, 0) < 0)
1664 goto vlc_fail;
39922395 1665 }
d86053a4
MM
1666 }
1667
d8278bab
MM
1668 init_vlc(&s->superblock_run_length_vlc, 6, 34,
1669 &superblock_run_length_vlc_table[0][1], 4, 2,
1670 &superblock_run_length_vlc_table[0][0], 4, 2, 0);
1671
dd36b667 1672 init_vlc(&s->fragment_run_length_vlc, 5, 30,
0ad72bdd
MM
1673 &fragment_run_length_vlc_table[0][1], 4, 2,
1674 &fragment_run_length_vlc_table[0][0], 4, 2, 0);
1675
1676 init_vlc(&s->mode_code_vlc, 3, 8,
1677 &mode_code_vlc_table[0][1], 2, 1,
1678 &mode_code_vlc_table[0][0], 2, 1, 0);
1679
1680 init_vlc(&s->motion_vector_vlc, 6, 63,
1681 &motion_vector_vlc_table[0][1], 2, 1,
1682 &motion_vector_vlc_table[0][0], 2, 1, 0);
1683
d86053a4
MM
1684 /* work out the block mapping tables */
1685 s->superblock_fragments = av_malloc(s->superblock_count * 16 * sizeof(int));
96a7e73b 1686 s->macroblock_coding = av_malloc(s->macroblock_count + 1);
ea676144 1687 if (!s->superblock_fragments || !s->macroblock_coding) {
0efbd068
MM
1688 vp3_decode_end(avctx);
1689 return -1;
1690 }
d86053a4
MM
1691 init_block_mapping(s);
1692
44ae98dd
MM
1693 for (i = 0; i < 3; i++) {
1694 s->current_frame.data[i] = NULL;
1695 s->last_frame.data[i] = NULL;
1696 s->golden_frame.data[i] = NULL;
61873c4a
MM
1697 }
1698
d86053a4 1699 return 0;
c4b7b8bf
RD
1700
1701vlc_fail:
1702 av_log(avctx, AV_LOG_FATAL, "Invalid huffman table\n");
1703 return -1;
d86053a4
MM
1704}
1705
1706/*
1707 * This is the ffmpeg/libavcodec API frame decode function.
1708 */
115329f1 1709static int vp3_decode_frame(AVCodecContext *avctx,
d86053a4 1710 void *data, int *data_size,
7a00bbad 1711 AVPacket *avpkt)
d86053a4 1712{
7a00bbad
TB
1713 const uint8_t *buf = avpkt->data;
1714 int buf_size = avpkt->size;
d86053a4
MM
1715 Vp3DecodeContext *s = avctx->priv_data;
1716 GetBitContext gb;
1717 static int counter = 0;
dc4b78d9 1718 int i;
d86053a4 1719
d86053a4 1720 init_get_bits(&gb, buf, buf_size * 8);
115329f1 1721
f44ee2c3
AB
1722 if (s->theora && get_bits1(&gb))
1723 {
bb270c08
DB
1724 av_log(avctx, AV_LOG_ERROR, "Header packet passed to frame decoder, skipping\n");
1725 return -1;
f44ee2c3 1726 }
3c3f113e
AB
1727
1728 s->keyframe = !get_bits1(&gb);
1729 if (!s->theora)
bb270c08 1730 skip_bits(&gb, 1);
f2264fa5
DC
1731 for (i = 0; i < 3; i++)
1732 s->last_qps[i] = s->qps[i];
efea8528 1733
f2264fa5 1734 s->nqps=0;
efea8528 1735 do{
f2264fa5
DC
1736 s->qps[s->nqps++]= get_bits(&gb, 6);
1737 } while(s->theora >= 0x030200 && s->nqps<3 && get_bits1(&gb));
1738 for (i = s->nqps; i < 3; i++)
1739 s->qps[i] = -1;
d86053a4 1740
f8830383 1741 if (s->avctx->debug & FF_DEBUG_PICT_INFO)
bb270c08 1742 av_log(s->avctx, AV_LOG_INFO, " VP3 %sframe #%d: Q index = %d\n",
f2264fa5 1743 s->keyframe?"key":"", counter, s->qps[0]);
d86053a4
MM
1744 counter++;
1745
f2264fa5 1746 if (s->qps[0] != s->last_qps[0])
f44b08a5 1747 init_loop_filter(s);
f2264fa5
DC
1748
1749 for (i = 0; i < s->nqps; i++)
1750 // reinit all dequantizers if the first one changed, because
1751 // the DC of the first quantizer must be used for all matrices
1752 if (s->qps[i] != s->last_qps[i] || s->qps[0] != s->last_qps[0])
1753 init_dequantizer(s, i);
642d7e84 1754
068e82ba
DC
1755 if (avctx->skip_frame >= AVDISCARD_NONKEY && !s->keyframe)
1756 return buf_size;
1757
739b5090 1758 s->current_frame.reference = 3;
ff65969f 1759 s->current_frame.pict_type = s->keyframe ? FF_I_TYPE : FF_P_TYPE;
739b5090
DC
1760 if (avctx->get_buffer(avctx, &s->current_frame) < 0) {
1761 av_log(s->avctx, AV_LOG_ERROR, "get_buffer() failed\n");
e72d2d12 1762 goto error;
739b5090
DC
1763 }
1764
d86053a4 1765 if (s->keyframe) {
bb270c08
DB
1766 if (!s->theora)
1767 {
1768 skip_bits(&gb, 4); /* width code */
1769 skip_bits(&gb, 4); /* height code */
1770 if (s->version)
1771 {
1772 s->version = get_bits(&gb, 5);
1773 if (counter == 1)
1774 av_log(s->avctx, AV_LOG_DEBUG, "VP version: %d\n", s->version);
1775 }
1776 }
1777 if (s->version || s->theora)
1778 {
1779 if (get_bits1(&gb))
1780 av_log(s->avctx, AV_LOG_ERROR, "Warning, unsupported keyframe coding type?!\n");
1781 skip_bits(&gb, 2); /* reserved? */
1782 }
d86053a4 1783 } else {
735acf56 1784 if (!s->golden_frame.data[0]) {
7a4e8b59 1785 av_log(s->avctx, AV_LOG_WARNING, "vp3: first frame not a keyframe\n");
ff65969f 1786
7a4e8b59 1787 s->golden_frame.reference = 3;
ff65969f 1788 s->golden_frame.pict_type = FF_I_TYPE;
7a4e8b59
DC
1789 if (avctx->get_buffer(avctx, &s->golden_frame) < 0) {
1790 av_log(s->avctx, AV_LOG_ERROR, "get_buffer() failed\n");
1791 goto error;
1792 }
1793 s->last_frame = s->golden_frame;
1794 s->last_frame.type = FF_BUFFER_TYPE_COPY;
d86053a4 1795 }
d86053a4
MM
1796 }
1797
b928ec64
MN
1798 s->current_frame.qscale_table= s->qscale_table; //FIXME allocate individual tables per AVFrame
1799 s->current_frame.qstride= 0;
1800
703acd54 1801 memset(s->all_fragments, 0, s->fragment_count * sizeof(Vp3Fragment));
d86053a4 1802
220a6f40
MN
1803 if (unpack_superblocks(s, &gb)){
1804 av_log(s->avctx, AV_LOG_ERROR, "error in unpack_superblocks\n");
e72d2d12 1805 goto error;
220a6f40 1806 }
220a6f40
MN
1807 if (unpack_modes(s, &gb)){
1808 av_log(s->avctx, AV_LOG_ERROR, "error in unpack_modes\n");
e72d2d12 1809 goto error;
220a6f40 1810 }
220a6f40
MN
1811 if (unpack_vectors(s, &gb)){
1812 av_log(s->avctx, AV_LOG_ERROR, "error in unpack_vectors\n");
e72d2d12 1813 goto error;
220a6f40 1814 }
f2264fa5
DC
1815 if (unpack_block_qpis(s, &gb)){
1816 av_log(s->avctx, AV_LOG_ERROR, "error in unpack_block_qpis\n");
e72d2d12 1817 goto error;
f2264fa5 1818 }
220a6f40
MN
1819 if (unpack_dct_coeffs(s, &gb)){
1820 av_log(s->avctx, AV_LOG_ERROR, "error in unpack_dct_coeffs\n");
e72d2d12 1821 goto error;
892fc83e 1822 }
735acf56
DC
1823
1824 for (i = 0; i < 3; i++) {
1e76a1da 1825 int height = s->height >> (i && s->chroma_y_shift);
735acf56
DC
1826 if (s->flipped_image)
1827 s->data_offset[i] = 0;
1828 else
1e76a1da 1829 s->data_offset[i] = (height-1) * s->current_frame.linesize[i];
735acf56 1830 }
d86053a4 1831
a8de3901 1832 s->last_slice_end = 0;
7a095ea6 1833 for (i = 0; i < s->c_superblock_height; i++)
dc4b78d9 1834 render_slice(s, i);
d86053a4 1835
256c0662
DC
1836 // filter the last row
1837 for (i = 0; i < 3; i++) {
1e76a1da 1838 int row = (s->height >> (3+(i && s->chroma_y_shift))) - 1;
256c0662
DC
1839 apply_loop_filter(s, i, row, row+1);
1840 }
a8de3901 1841 vp3_draw_horiz_band(s, s->height);
892fc83e 1842
d86053a4
MM
1843 *data_size=sizeof(AVFrame);
1844 *(AVFrame*)data= s->current_frame;
1845
44ae98dd
MM
1846 /* release the last frame, if it is allocated and if it is not the
1847 * golden frame */
0c9afacb 1848 if (s->last_frame.data[0] && s->last_frame.type != FF_BUFFER_TYPE_COPY)
44ae98dd 1849 avctx->release_buffer(avctx, &s->last_frame);
d86053a4 1850
61873c4a 1851 /* shuffle frames (last = current) */
4501e678 1852 s->last_frame= s->current_frame;
739b5090
DC
1853
1854 if (s->keyframe) {
1855 if (s->golden_frame.data[0])
1856 avctx->release_buffer(avctx, &s->golden_frame);
1857 s->golden_frame = s->current_frame;
0c9afacb 1858 s->last_frame.type = FF_BUFFER_TYPE_COPY;
739b5090
DC
1859 }
1860
8e39d4a7 1861 s->current_frame.data[0]= NULL; /* ensure that we catch any access to this released frame */
d86053a4
MM
1862
1863 return buf_size;
e72d2d12
DC
1864
1865error:
1866 if (s->current_frame.data[0])
1867 avctx->release_buffer(avctx, &s->current_frame);
1868 return -1;
d86053a4
MM
1869}
1870
1871/*
1872 * This is the ffmpeg/libavcodec API module cleanup function.
1873 */
98a6fff9 1874static av_cold int vp3_decode_end(AVCodecContext *avctx)
d86053a4
MM
1875{
1876 Vp3DecodeContext *s = avctx->priv_data;
6f4e2b5a 1877 int i;
d86053a4 1878
6f4e2b5a 1879 av_free(s->superblock_coding);
d86053a4 1880 av_free(s->all_fragments);
c72625f2
DC
1881 av_free(s->coded_fragment_list[0]);
1882 av_free(s->dct_tokens_base);
d86053a4 1883 av_free(s->superblock_fragments);
96a7e73b 1884 av_free(s->macroblock_coding);
14268254
DC
1885 av_free(s->motion_val[0]);
1886 av_free(s->motion_val[1]);
115329f1 1887
6f4e2b5a
MR
1888 for (i = 0; i < 16; i++) {
1889 free_vlc(&s->dc_vlc[i]);
1890 free_vlc(&s->ac_vlc_1[i]);
1891 free_vlc(&s->ac_vlc_2[i]);
1892 free_vlc(&s->ac_vlc_3[i]);
1893 free_vlc(&s->ac_vlc_4[i]);
1894 }
1895
1896 free_vlc(&s->superblock_run_length_vlc);
1897 free_vlc(&s->fragment_run_length_vlc);
1898 free_vlc(&s->mode_code_vlc);
1899 free_vlc(&s->motion_vector_vlc);
1900
d86053a4 1901 /* release all frames */
0c9afacb 1902 if (s->golden_frame.data[0])
892fc83e 1903 avctx->release_buffer(avctx, &s->golden_frame);
0c9afacb 1904 if (s->last_frame.data[0] && s->last_frame.type != FF_BUFFER_TYPE_COPY)
892fc83e
MM
1905 avctx->release_buffer(avctx, &s->last_frame);
1906 /* no need to release the current_frame since it will always be pointing
1907 * to the same frame as either the golden or last frame */
d86053a4
MM
1908
1909 return 0;
1910}
1911
39922395
MM
1912static int read_huffman_tree(AVCodecContext *avctx, GetBitContext *gb)
1913{
1914 Vp3DecodeContext *s = avctx->priv_data;
1915
5fc32c27 1916 if (get_bits1(gb)) {
39922395
MM
1917 int token;
1918 if (s->entries >= 32) { /* overflow */
1919 av_log(avctx, AV_LOG_ERROR, "huffman tree overflow\n");
1920 return -1;
1921 }
1922 token = get_bits(gb, 5);
1923 //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);
1924 s->huffman_table[s->hti][token][0] = s->hbits;
1925 s->huffman_table[s->hti][token][1] = s->huff_code_size;
1926 s->entries++;
1927 }
1928 else {
1929 if (s->huff_code_size >= 32) {/* overflow */
1930 av_log(avctx, AV_LOG_ERROR, "huffman tree overflow\n");
1931 return -1;
1932 }
1933 s->huff_code_size++;
1934 s->hbits <<= 1;
00bbe276
AC
1935 if (read_huffman_tree(avctx, gb))
1936 return -1;
39922395 1937 s->hbits |= 1;
00bbe276
AC
1938 if (read_huffman_tree(avctx, gb))
1939 return -1;
39922395
MM
1940 s->hbits >>= 1;
1941 s->huff_code_size--;
1942 }
1943 return 0;
1944}
1945
b250f9c6 1946#if CONFIG_THEORA_DECODER
1e76a1da
DC
1947static const enum PixelFormat theora_pix_fmts[4] = {
1948 PIX_FMT_YUV420P, PIX_FMT_NONE, PIX_FMT_YUV422P, PIX_FMT_YUV444P
1949};
1950
e278056f 1951static int theora_decode_header(AVCodecContext *avctx, GetBitContext *gb)
f44ee2c3
AB
1952{
1953 Vp3DecodeContext *s = avctx->priv_data;
ea3c2d53 1954 int visible_width, visible_height, colorspace;
ddc7e438 1955 int offset_x = 0, offset_y = 0;
8099d6c9 1956 AVRational fps;
9a7ad925 1957
e278056f 1958 s->theora = get_bits_long(gb, 24);
356306ac 1959 av_log(avctx, AV_LOG_DEBUG, "Theora bitstream version %X\n", s->theora);
105c3d25 1960
ba7ee4a4 1961 /* 3.2.0 aka alpha3 has the same frame orientation as original vp3 */
9a7ad925 1962 /* but previous versions have the image flipped relative to vp3 */
ba7ee4a4 1963 if (s->theora < 0x030200)
9a7ad925 1964 {
bb270c08 1965 s->flipped_image = 1;
9a7ad925
AB
1966 av_log(avctx, AV_LOG_DEBUG, "Old (<alpha3) Theora bitstream, flipped image\n");
1967 }
f44ee2c3 1968
277e3e53
DC
1969 visible_width = s->width = get_bits(gb, 16) << 4;
1970 visible_height = s->height = get_bits(gb, 16) << 4;
115329f1 1971
0ecca7a4 1972 if(avcodec_check_dimensions(avctx, s->width, s->height)){
7146d2c2 1973 av_log(avctx, AV_LOG_ERROR, "Invalid dimensions (%dx%d)\n", s->width, s->height);
0ecca7a4
MN
1974 s->width= s->height= 0;
1975 return -1;
1976 }
7146d2c2 1977
277e3e53 1978 if (s->theora >= 0x030200) {
a0ce2d1b
DC
1979 visible_width = get_bits_long(gb, 24);
1980 visible_height = get_bits_long(gb, 24);
c0f716b8 1981
ddc7e438
DC
1982 offset_x = get_bits(gb, 8); /* offset x */
1983 offset_y = get_bits(gb, 8); /* offset y, from bottom */
ba4816a0 1984 }
f44ee2c3 1985
8099d6c9
DC
1986 fps.num = get_bits_long(gb, 32);
1987 fps.den = get_bits_long(gb, 32);
1988 if (fps.num && fps.den) {
1989 av_reduce(&s->avctx->time_base.num, &s->avctx->time_base.den,
1990 fps.den, fps.num, INT_MAX);
1991 }
1992
1993 avctx->sample_aspect_ratio.num = get_bits_long(gb, 24);
1994 avctx->sample_aspect_ratio.den = get_bits_long(gb, 24);
115329f1 1995
ba7ee4a4 1996 if (s->theora < 0x030200)
e278056f 1997 skip_bits(gb, 5); /* keyframe frequency force */
ea3c2d53 1998 colorspace = get_bits(gb, 8);
e278056f 1999 skip_bits(gb, 24); /* bitrate */
f44ee2c3 2000
e278056f 2001 skip_bits(gb, 6); /* quality hint */
115329f1 2002
ba7ee4a4 2003 if (s->theora >= 0x030200)
105c3d25 2004 {
e278056f 2005 skip_bits(gb, 5); /* keyframe frequency force */
1e76a1da 2006 avctx->pix_fmt = theora_pix_fmts[get_bits(gb, 2)];
337f5c6e 2007 skip_bits(gb, 3); /* reserved */
105c3d25 2008 }
115329f1 2009
e278056f 2010// align_get_bits(gb);
115329f1 2011
c0f716b8 2012 if ( visible_width <= s->width && visible_width > s->width-16
ddc7e438
DC
2013 && visible_height <= s->height && visible_height > s->height-16
2014 && !offset_x && (offset_y == s->height - visible_height))
c0f716b8
AJ
2015 avcodec_set_dimensions(avctx, visible_width, visible_height);
2016 else
2017 avcodec_set_dimensions(avctx, s->width, s->height);
f44ee2c3 2018
ea3c2d53
DC
2019 if (colorspace == 1) {
2020 avctx->color_primaries = AVCOL_PRI_BT470M;
2021 } else if (colorspace == 2) {
2022 avctx->color_primaries = AVCOL_PRI_BT470BG;
2023 }
2024 if (colorspace == 1 || colorspace == 2) {
2025 avctx->colorspace = AVCOL_SPC_BT470BG;
2026 avctx->color_trc = AVCOL_TRC_BT709;
2027 }
2028
f44ee2c3
AB
2029 return 0;
2030}
2031
e278056f 2032static int theora_decode_tables(AVCodecContext *avctx, GetBitContext *gb)
f44ee2c3
AB
2033{
2034 Vp3DecodeContext *s = avctx->priv_data;
ae1dd8e1 2035 int i, n, matrices, inter, plane;
ba7ee4a4
MC
2036
2037 if (s->theora >= 0x030200) {
e278056f 2038 n = get_bits(gb, 3);
9c7154c7 2039 /* loop filter limit values table */
e13cca4b 2040 for (i = 0; i < 64; i++) {
e278056f 2041 s->filter_limit_values[i] = get_bits(gb, n);
e13cca4b
RD
2042 if (s->filter_limit_values[i] > 127) {
2043 av_log(avctx, AV_LOG_ERROR, "filter limit value too large (%i > 127), clamping\n", s->filter_limit_values[i]);
2044 s->filter_limit_values[i] = 127;
2045 }
2046 }
ba7ee4a4 2047 }
115329f1 2048
ba7ee4a4 2049 if (s->theora >= 0x030200)
e278056f 2050 n = get_bits(gb, 4) + 1;
ba7ee4a4
MC
2051 else
2052 n = 16;
f44ee2c3
AB
2053 /* quality threshold table */
2054 for (i = 0; i < 64; i++)
e278056f 2055 s->coded_ac_scale_factor[i] = get_bits(gb, n);
f44ee2c3 2056
ba7ee4a4 2057 if (s->theora >= 0x030200)
e278056f 2058 n = get_bits(gb, 4) + 1;
ba7ee4a4
MC
2059 else
2060 n = 16;
f44ee2c3
AB
2061 /* dc scale factor table */
2062 for (i = 0; i < 64; i++)
e278056f 2063 s->coded_dc_scale_factor[i] = get_bits(gb, n);
f44ee2c3 2064
ba7ee4a4 2065 if (s->theora >= 0x030200)
e278056f 2066 matrices = get_bits(gb, 9) + 1;
ba7ee4a4 2067 else
2da2ba03 2068 matrices = 3;
f44ee2c3 2069
ae1dd8e1
MN
2070 if(matrices > 384){
2071 av_log(avctx, AV_LOG_ERROR, "invalid number of base matrixes\n");
2072 return -1;
2073 }
3c3f113e 2074
ae1dd8e1 2075 for(n=0; n<matrices; n++){
bb270c08 2076 for (i = 0; i < 64; i++)
ae1dd8e1
MN
2077 s->base_matrix[n][i]= get_bits(gb, 8);
2078 }
2da2ba03 2079
ae1dd8e1
MN
2080 for (inter = 0; inter <= 1; inter++) {
2081 for (plane = 0; plane <= 2; plane++) {
2082 int newqr= 1;
2083 if (inter || plane > 0)
5fc32c27 2084 newqr = get_bits1(gb);
39922395 2085 if (!newqr) {
ae1dd8e1 2086 int qtj, plj;
5fc32c27 2087 if(inter && get_bits1(gb)){
ae1dd8e1
MN
2088 qtj = 0;
2089 plj = plane;
2090 }else{
2091 qtj= (3*inter + plane - 1) / 3;
2092 plj= (plane + 2) % 3;
2093 }
2094 s->qr_count[inter][plane]= s->qr_count[qtj][plj];
2095 memcpy(s->qr_size[inter][plane], s->qr_size[qtj][plj], sizeof(s->qr_size[0][0]));
2096 memcpy(s->qr_base[inter][plane], s->qr_base[qtj][plj], sizeof(s->qr_base[0][0]));
2097 } else {
2098 int qri= 0;
39922395 2099 int qi = 0;
ae1dd8e1
MN
2100
2101 for(;;){
2102 i= get_bits(gb, av_log2(matrices-1)+1);
2103 if(i>= matrices){
2104 av_log(avctx, AV_LOG_ERROR, "invalid base matrix index\n");
2105 return -1;
2106 }
2107 s->qr_base[inter][plane][qri]= i;
2108 if(qi >= 63)
2109 break;
2110 i = get_bits(gb, av_log2(63-qi)+1) + 1;
2111 s->qr_size[inter][plane][qri++]= i;
2112 qi += i;
39922395 2113 }
ae1dd8e1 2114
2da2ba03 2115 if (qi > 63) {
7146d2c2 2116 av_log(avctx, AV_LOG_ERROR, "invalid qi %d > 63\n", qi);
bb270c08
DB
2117 return -1;
2118 }
ae1dd8e1 2119 s->qr_count[inter][plane]= qri;
39922395
MM
2120 }
2121 }
2122 }
2123
2da2ba03 2124 /* Huffman tables */
39922395
MM
2125 for (s->hti = 0; s->hti < 80; s->hti++) {
2126 s->entries = 0;
2127 s->huff_code_size = 1;
5fc32c27 2128 if (!get_bits1(gb)) {
39922395 2129 s->hbits = 0;
00bbe276
AC
2130 if(read_huffman_tree(avctx, gb))
2131 return -1;
39922395 2132 s->hbits = 1;
00bbe276
AC
2133 if(read_huffman_tree(avctx, gb))
2134 return -1;
39922395
MM
2135 }
2136 }
115329f1 2137
f44ee2c3 2138 s->theora_tables = 1;
115329f1 2139
f44ee2c3
AB
2140 return 0;
2141}
2142
5ef251e5 2143static av_cold int theora_decode_init(AVCodecContext *avctx)
f44ee2c3
AB
2144{
2145 Vp3DecodeContext *s = avctx->priv_data;
2146 GetBitContext gb;
2147 int ptype;
da91ed59
AJ
2148 uint8_t *header_start[3];
2149 int header_len[3];
2150 int i;
115329f1 2151
f44ee2c3
AB
2152 s->theora = 1;
2153
2154 if (!avctx->extradata_size)
7146d2c2
AB
2155 {
2156 av_log(avctx, AV_LOG_ERROR, "Missing extradata!\n");
bb270c08 2157 return -1;
7146d2c2 2158 }
f44ee2c3 2159
da91ed59
AJ
2160 if (ff_split_xiph_headers(avctx->extradata, avctx->extradata_size,
2161 42, header_start, header_len) < 0) {
2162 av_log(avctx, AV_LOG_ERROR, "Corrupt extradata\n");
2163 return -1;
2164 }
ee89b2b9 2165
da91ed59 2166 for(i=0;i<3;i++) {
fa6f2751 2167 init_get_bits(&gb, header_start[i], header_len[i] * 8);
f44ee2c3
AB
2168
2169 ptype = get_bits(&gb, 8);
115329f1 2170
7146d2c2
AB
2171 if (!(ptype & 0x80))
2172 {
2173 av_log(avctx, AV_LOG_ERROR, "Invalid extradata!\n");
e278056f 2174// return -1;
115329f1 2175 }
7146d2c2 2176
3700dab4 2177 // FIXME: Check for this as well.
0a8dedc9 2178 skip_bits_long(&gb, 6*8); /* "theora" */
115329f1 2179
f44ee2c3
AB
2180 switch(ptype)
2181 {
2182 case 0x80:
e278056f 2183 theora_decode_header(avctx, &gb);
bb270c08
DB
2184 break;
2185 case 0x81:
2da2ba03 2186// FIXME: is this needed? it breaks sometimes
bb270c08
DB
2187// theora_decode_comments(avctx, gb);
2188 break;
2189 case 0x82:
00bbe276
AC
2190 if (theora_decode_tables(avctx, &gb))
2191 return -1;
bb270c08
DB
2192 break;
2193 default:
2194 av_log(avctx, AV_LOG_ERROR, "Unknown Theora config packet: %d\n", ptype&~0x80);
2195 break;
f44ee2c3 2196 }
12ce1f3f
DC
2197 if(ptype != 0x81 && 8*header_len[i] != get_bits_count(&gb))
2198 av_log(avctx, AV_LOG_WARNING, "%d bits left in packet %X\n", 8*header_len[i] - get_bits_count(&gb), ptype);
116d866c
MC
2199 if (s->theora < 0x030200)
2200 break;
ee89b2b9 2201 }
f44ee2c3 2202
c79c960a 2203 return vp3_decode_init(avctx);
f44ee2c3
AB
2204}
2205
6f6a3e2a
DB
2206AVCodec theora_decoder = {
2207 "theora",
72415b2a 2208 AVMEDIA_TYPE_VIDEO,
6f6a3e2a 2209 CODEC_ID_THEORA,
d86053a4 2210 sizeof(Vp3DecodeContext),
6f6a3e2a 2211 theora_decode_init,
d86053a4
MM
2212 NULL,
2213 vp3_decode_end,
2214 vp3_decode_frame,
a8de3901 2215 CODEC_CAP_DR1 | CODEC_CAP_DRAW_HORIZ_BAND,
d5202e4f 2216 NULL,
fe4bf374 2217 .long_name = NULL_IF_CONFIG_SMALL("Theora"),
d86053a4 2218};
6f6a3e2a 2219#endif
f44ee2c3 2220
6f6a3e2a
DB
2221AVCodec vp3_decoder = {
2222 "vp3",
72415b2a 2223 AVMEDIA_TYPE_VIDEO,
6f6a3e2a 2224 CODEC_ID_VP3,
f44ee2c3 2225 sizeof(Vp3DecodeContext),
6f6a3e2a 2226 vp3_decode_init,
f44ee2c3
AB
2227 NULL,
2228 vp3_decode_end,
2229 vp3_decode_frame,
a8de3901 2230 CODEC_CAP_DR1 | CODEC_CAP_DRAW_HORIZ_BAND,
d5202e4f 2231 NULL,
fe4bf374 2232 .long_name = NULL_IF_CONFIG_SMALL("On2 VP3"),
f44ee2c3 2233};