build: fix standalone compilation of ADX encoder
[libav.git] / libavcodec / vp3.c
CommitLineData
d86053a4 1/*
67335dbc 2 * Copyright (C) 2003-2004 the ffmpeg project
d86053a4 3 *
2912e87a 4 * This file is part of Libav.
b78e7197 5 *
2912e87a 6 * Libav is free software; you can redistribute it and/or
d86053a4
MM
7 * modify it under the terms of the GNU Lesser General Public
8 * License as published by the Free Software Foundation; either
b78e7197 9 * version 2.1 of the License, or (at your option) any later version.
d86053a4 10 *
2912e87a 11 * Libav 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
2912e87a 17 * License along with Libav; if not, write to the Free Software
5509bffa 18 * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA
d86053a4
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19 */
20
21/**
ba87f080 22 * @file
d86053a4 23 * On2 VP3 Video Decoder
0ad72bdd
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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
0ad72bdd
MM
28 *
29 * Theora decoder by Alex Beregszaszi
d86053a4
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30 */
31
32#include <stdio.h>
33#include <stdlib.h>
34#include <string.h>
d86053a4 35
737eb597 36#include "libavutil/imgutils.h"
d86053a4 37#include "avcodec.h"
f3a29b75 38#include "internal.h"
d86053a4 39#include "dsputil.h"
9106a698 40#include "get_bits.h"
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41
42#include "vp3data.h"
da91ed59 43#include "xiph.h"
d23845f3 44#include "thread.h"
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45
46#define FRAGMENT_PIXELS 8
47
0efbd068 48static av_cold int vp3_decode_end(AVCodecContext *avctx);
8370e426 49static void vp3_decode_flush(AVCodecContext *avctx);
0efbd068 50
7beddb12 51//FIXME split things out into their own arrays
d86053a4 52typedef struct Vp3Fragment {
c72625f2 53 int16_t dc;
288774bb 54 uint8_t coding_method;
f2264fa5 55 uint8_t qpi;
d86053a4
MM
56} Vp3Fragment;
57
58#define SB_NOT_CODED 0
59#define SB_PARTIALLY_CODED 1
60#define SB_FULLY_CODED 2
61
ecb51b25
DC
62// This is the maximum length of a single long bit run that can be encoded
63// for superblock coding or block qps. Theora special-cases this to read a
64// bit instead of flipping the current bit to allow for runs longer than 4129.
65#define MAXIMUM_LONG_BIT_RUN 4129
66
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MM
67#define MODE_INTER_NO_MV 0
68#define MODE_INTRA 1
69#define MODE_INTER_PLUS_MV 2
70#define MODE_INTER_LAST_MV 3
71#define MODE_INTER_PRIOR_LAST 4
72#define MODE_USING_GOLDEN 5
73#define MODE_GOLDEN_MV 6
74#define MODE_INTER_FOURMV 7
75#define CODING_MODE_COUNT 8
76
77/* special internal mode */
78#define MODE_COPY 8
79
80/* There are 6 preset schemes, plus a free-form scheme */
e8e47435 81static const int ModeAlphabet[6][CODING_MODE_COUNT] =
d86053a4 82{
d86053a4 83 /* scheme 1: Last motion vector dominates */
115329f1 84 { MODE_INTER_LAST_MV, MODE_INTER_PRIOR_LAST,
d86053a4 85 MODE_INTER_PLUS_MV, MODE_INTER_NO_MV,
115329f1 86 MODE_INTRA, MODE_USING_GOLDEN,
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MM
87 MODE_GOLDEN_MV, MODE_INTER_FOURMV },
88
89 /* scheme 2 */
115329f1 90 { MODE_INTER_LAST_MV, MODE_INTER_PRIOR_LAST,
d86053a4 91 MODE_INTER_NO_MV, MODE_INTER_PLUS_MV,
115329f1 92 MODE_INTRA, MODE_USING_GOLDEN,
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MM
93 MODE_GOLDEN_MV, MODE_INTER_FOURMV },
94
95 /* scheme 3 */
115329f1 96 { MODE_INTER_LAST_MV, MODE_INTER_PLUS_MV,
d86053a4 97 MODE_INTER_PRIOR_LAST, MODE_INTER_NO_MV,
115329f1 98 MODE_INTRA, MODE_USING_GOLDEN,
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MM
99 MODE_GOLDEN_MV, MODE_INTER_FOURMV },
100
101 /* scheme 4 */
115329f1 102 { MODE_INTER_LAST_MV, MODE_INTER_PLUS_MV,
d86053a4 103 MODE_INTER_NO_MV, MODE_INTER_PRIOR_LAST,
115329f1 104 MODE_INTRA, MODE_USING_GOLDEN,
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MM
105 MODE_GOLDEN_MV, MODE_INTER_FOURMV },
106
107 /* scheme 5: No motion vector dominates */
115329f1 108 { MODE_INTER_NO_MV, MODE_INTER_LAST_MV,
d86053a4 109 MODE_INTER_PRIOR_LAST, MODE_INTER_PLUS_MV,
115329f1 110 MODE_INTRA, MODE_USING_GOLDEN,
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MM
111 MODE_GOLDEN_MV, MODE_INTER_FOURMV },
112
113 /* scheme 6 */
115329f1 114 { MODE_INTER_NO_MV, MODE_USING_GOLDEN,
d86053a4 115 MODE_INTER_LAST_MV, MODE_INTER_PRIOR_LAST,
115329f1 116 MODE_INTER_PLUS_MV, MODE_INTRA,
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MM
117 MODE_GOLDEN_MV, MODE_INTER_FOURMV },
118
119};
120
7a095ea6
DC
121static const uint8_t hilbert_offset[16][2] = {
122 {0,0}, {1,0}, {1,1}, {0,1},
123 {0,2}, {0,3}, {1,3}, {1,2},
124 {2,2}, {2,3}, {3,3}, {3,2},
125 {3,1}, {2,1}, {2,0}, {3,0}
126};
127
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128#define MIN_DEQUANT_VAL 2
129
130typedef struct Vp3DecodeContext {
131 AVCodecContext *avctx;
f44ee2c3 132 int theora, theora_tables;
3c3f113e 133 int version;
d86053a4 134 int width, height;
1e76a1da 135 int chroma_x_shift, chroma_y_shift;
d86053a4
MM
136 AVFrame golden_frame;
137 AVFrame last_frame;
138 AVFrame current_frame;
139 int keyframe;
140 DSPContext dsp;
9a7ad925 141 int flipped_image;
a8de3901 142 int last_slice_end;
a4501a45 143 int skip_loop_filter;
d86053a4 144
f2264fa5
DC
145 int qps[3];
146 int nqps;
147 int last_qps[3];
d86053a4
MM
148
149 int superblock_count;
892fc83e
MM
150 int y_superblock_width;
151 int y_superblock_height;
35c28d23 152 int y_superblock_count;
892fc83e
MM
153 int c_superblock_width;
154 int c_superblock_height;
35c28d23 155 int c_superblock_count;
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156 int u_superblock_start;
157 int v_superblock_start;
158 unsigned char *superblock_coding;
159
160 int macroblock_count;
161 int macroblock_width;
162 int macroblock_height;
163
164 int fragment_count;
57783884
DC
165 int fragment_width[2];
166 int fragment_height[2];
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167
168 Vp3Fragment *all_fragments;
1abbf64e 169 int fragment_start[3];
735acf56 170 int data_offset[3];
115329f1 171
14268254
DC
172 int8_t (*motion_val[2])[2];
173
36af0c95 174 ScanTable scantable;
115329f1 175
f44ee2c3
AB
176 /* tables */
177 uint16_t coded_dc_scale_factor[64];
67335dbc 178 uint32_t coded_ac_scale_factor[64];
ae1dd8e1
MN
179 uint8_t base_matrix[384][64];
180 uint8_t qr_count[2][3];
181 uint8_t qr_size [2][3][64];
182 uint16_t qr_base[2][3][64];
d86053a4 183
c72625f2
DC
184 /**
185 * This is a list of all tokens in bitstream order. Reordering takes place
186 * by pulling from each level during IDCT. As a consequence, IDCT must be
187 * in Hilbert order, making the minimum slice height 64 for 4:2:0 and 32
188 * otherwise. The 32 different tokens with up to 12 bits of extradata are
189 * collapsed into 3 types, packed as follows:
190 * (from the low to high bits)
191 *
192 * 2 bits: type (0,1,2)
193 * 0: EOB run, 14 bits for run length (12 needed)
194 * 1: zero run, 7 bits for run length
195 * 7 bits for the next coefficient (3 needed)
196 * 2: coefficient, 14 bits (11 needed)
197 *
198 * Coefficients are signed, so are packed in the highest bits for automatic
199 * sign extension.
200 */
201 int16_t *dct_tokens[3][64];
202 int16_t *dct_tokens_base;
203#define TOKEN_EOB(eob_run) ((eob_run) << 2)
204#define TOKEN_ZERO_RUN(coeff, zero_run) (((coeff) << 9) + ((zero_run) << 2) + 1)
205#define TOKEN_COEFF(coeff) (((coeff) << 2) + 2)
206
207 /**
208 * number of blocks that contain DCT coefficients at the given level or higher
209 */
210 int num_coded_frags[3][64];
211 int total_num_coded_frags;
212
f4433de9 213 /* this is a list of indexes into the all_fragments array indicating
d86053a4 214 * which of the fragments are coded */
c72625f2 215 int *coded_fragment_list[3];
098523eb 216
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217 VLC dc_vlc[16];
218 VLC ac_vlc_1[16];
219 VLC ac_vlc_2[16];
220 VLC ac_vlc_3[16];
221 VLC ac_vlc_4[16];
222
0ad72bdd
MM
223 VLC superblock_run_length_vlc;
224 VLC fragment_run_length_vlc;
225 VLC mode_code_vlc;
226 VLC motion_vector_vlc;
227
38acbc3c
MM
228 /* these arrays need to be on 16-byte boundaries since SSE2 operations
229 * index into them */
02494787 230 DECLARE_ALIGNED(16, int16_t, qmat)[3][2][3][64]; ///< qmat[qpi][is_inter][plane]
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MM
231
232 /* This table contains superblock_count * 16 entries. Each set of 16
f4433de9 233 * numbers corresponds to the fragment indexes 0..15 of the superblock.
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234 * An entry will be -1 to indicate that no entry corresponds to that
235 * index. */
236 int *superblock_fragments;
237
115329f1 238 /* This is an array that indicates how a particular macroblock
74c0ac12 239 * is coded. */
96a7e73b 240 unsigned char *macroblock_coding;
d86053a4 241
902685b8 242 uint8_t *edge_emu_buffer;
39922395 243
f44b08a5
MM
244 /* Huffman decode */
245 int hti;
246 unsigned int hbits;
247 int entries;
248 int huff_code_size;
8e6daa4a 249 uint32_t huffman_table[80][32][2];
f44b08a5 250
51ace577 251 uint8_t filter_limit_values[64];
84dc2d8a 252 DECLARE_ALIGNED(8, int, bounding_values_array)[256+2];
d86053a4
MM
253} Vp3DecodeContext;
254
255/************************************************************************
256 * VP3 specific functions
257 ************************************************************************/
258
259/*
260 * This function sets up all of the various blocks mappings:
261 * superblocks <-> fragments, macroblocks <-> fragments,
262 * superblocks <-> macroblocks
892fc83e 263 *
49bd8e4b 264 * @return 0 is successful; returns 1 if *anything* went wrong.
d86053a4 265 */
115329f1 266static int init_block_mapping(Vp3DecodeContext *s)
d86053a4 267{
a16389c1
DC
268 int sb_x, sb_y, plane;
269 int x, y, i, j = 0;
270
271 for (plane = 0; plane < 3; plane++) {
272 int sb_width = plane ? s->c_superblock_width : s->y_superblock_width;
273 int sb_height = plane ? s->c_superblock_height : s->y_superblock_height;
57783884
DC
274 int frag_width = s->fragment_width[!!plane];
275 int frag_height = s->fragment_height[!!plane];
a16389c1
DC
276
277 for (sb_y = 0; sb_y < sb_height; sb_y++)
278 for (sb_x = 0; sb_x < sb_width; sb_x++)
279 for (i = 0; i < 16; i++) {
280 x = 4*sb_x + hilbert_offset[i][0];
281 y = 4*sb_y + hilbert_offset[i][1];
282
283 if (x < frag_width && y < frag_height)
284 s->superblock_fragments[j++] = s->fragment_start[plane] + y*frag_width + x;
285 else
286 s->superblock_fragments[j++] = -1;
287 }
d86053a4
MM
288 }
289
892fc83e 290 return 0; /* successful path out */
d86053a4
MM
291}
292
293/*
f44b08a5 294 * This function sets up the dequantization tables used for a particular
d86053a4
MM
295 * frame.
296 */
f2264fa5 297static void init_dequantizer(Vp3DecodeContext *s, int qpi)
d86053a4 298{
f2264fa5
DC
299 int ac_scale_factor = s->coded_ac_scale_factor[s->qps[qpi]];
300 int dc_scale_factor = s->coded_dc_scale_factor[s->qps[qpi]];
36c32bdd 301 int i, plane, inter, qri, bmi, bmj, qistart;
d86053a4 302
ae1dd8e1
MN
303 for(inter=0; inter<2; inter++){
304 for(plane=0; plane<3; plane++){
305 int sum=0;
306 for(qri=0; qri<s->qr_count[inter][plane]; qri++){
307 sum+= s->qr_size[inter][plane][qri];
f2264fa5 308 if(s->qps[qpi] <= sum)
ae1dd8e1
MN
309 break;
310 }
311 qistart= sum - s->qr_size[inter][plane][qri];
312 bmi= s->qr_base[inter][plane][qri ];
313 bmj= s->qr_base[inter][plane][qri+1];
314 for(i=0; i<64; i++){
f2264fa5
DC
315 int coeff= ( 2*(sum -s->qps[qpi])*s->base_matrix[bmi][i]
316 - 2*(qistart-s->qps[qpi])*s->base_matrix[bmj][i]
ae1dd8e1
MN
317 + s->qr_size[inter][plane][qri])
318 / (2*s->qr_size[inter][plane][qri]);
319
a14ab4e4 320 int qmin= 8<<(inter + !i);
ae1dd8e1
MN
321 int qscale= i ? ac_scale_factor : dc_scale_factor;
322
f2264fa5 323 s->qmat[qpi][inter][plane][s->dsp.idct_permutation[i]]= av_clip((qscale * coeff)/100 * 4, qmin, 4096);
ae1dd8e1 324 }
f2264fa5
DC
325 // all DC coefficients use the same quant so as not to interfere with DC prediction
326 s->qmat[qpi][inter][plane][0] = s->qmat[0][inter][plane][0];
ae1dd8e1 327 }
d86053a4 328 }
d86053a4
MM
329}
330
331/*
f44b08a5
MM
332 * This function initializes the loop filter boundary limits if the frame's
333 * quality index is different from the previous frame's.
7fa5f999
RD
334 *
335 * The filter_limit_values may not be larger than 127.
f44b08a5
MM
336 */
337static void init_loop_filter(Vp3DecodeContext *s)
338{
339 int *bounding_values= s->bounding_values_array+127;
340 int filter_limit;
341 int x;
7fa5f999 342 int value;
f44b08a5 343
f2264fa5 344 filter_limit = s->filter_limit_values[s->qps[0]];
f44b08a5
MM
345
346 /* set up the bounding values */
347 memset(s->bounding_values_array, 0, 256 * sizeof(int));
348 for (x = 0; x < filter_limit; x++) {
f44b08a5
MM
349 bounding_values[-x] = -x;
350 bounding_values[x] = x;
f44b08a5 351 }
7fa5f999
RD
352 for (x = value = filter_limit; x < 128 && value; x++, value--) {
353 bounding_values[ x] = value;
354 bounding_values[-x] = -value;
355 }
356 if (value)
357 bounding_values[128] = value;
357f45d9 358 bounding_values[129] = bounding_values[130] = filter_limit * 0x02020202;
f44b08a5
MM
359}
360
361/*
115329f1 362 * This function unpacks all of the superblock/macroblock/fragment coding
d86053a4
MM
363 * information from the bitstream.
364 */
892fc83e 365static int unpack_superblocks(Vp3DecodeContext *s, GetBitContext *gb)
d86053a4 366{
e2720b6b 367 int superblock_starts[3] = { 0, s->u_superblock_start, s->v_superblock_start };
d86053a4
MM
368 int bit = 0;
369 int current_superblock = 0;
370 int current_run = 0;
855c720c 371 int num_partial_superblocks = 0;
d86053a4
MM
372
373 int i, j;
374 int current_fragment;
35c28d23 375 int plane;
d86053a4 376
d86053a4 377 if (s->keyframe) {
d86053a4
MM
378 memset(s->superblock_coding, SB_FULLY_CODED, s->superblock_count);
379
380 } else {
381
382 /* unpack the list of partially-coded superblocks */
cc46005f
DC
383 bit = get_bits1(gb) ^ 1;
384 current_run = 0;
385
60867312 386 while (current_superblock < s->superblock_count && get_bits_left(gb) > 0) {
cc46005f
DC
387 if (s->theora && current_run == MAXIMUM_LONG_BIT_RUN)
388 bit = get_bits1(gb);
389 else
390 bit ^= 1;
391
115329f1 392 current_run = get_vlc2(gb,
33dbc1b7
DC
393 s->superblock_run_length_vlc.table, 6, 2) + 1;
394 if (current_run == 34)
d8278bab 395 current_run += get_bits(gb, 12);
d86053a4 396
33dbc1b7
DC
397 if (current_superblock + current_run > s->superblock_count) {
398 av_log(s->avctx, AV_LOG_ERROR, "Invalid partially coded superblock run length\n");
399 return -1;
400 }
401
402 memset(s->superblock_coding + current_superblock, bit, current_run);
403
404 current_superblock += current_run;
855c720c
DC
405 if (bit)
406 num_partial_superblocks += current_run;
d86053a4
MM
407 }
408
409 /* unpack the list of fully coded superblocks if any of the blocks were
410 * not marked as partially coded in the previous step */
855c720c
DC
411 if (num_partial_superblocks < s->superblock_count) {
412 int superblocks_decoded = 0;
d86053a4
MM
413
414 current_superblock = 0;
cc46005f
DC
415 bit = get_bits1(gb) ^ 1;
416 current_run = 0;
417
60867312
DC
418 while (superblocks_decoded < s->superblock_count - num_partial_superblocks
419 && get_bits_left(gb) > 0) {
cc46005f
DC
420
421 if (s->theora && current_run == MAXIMUM_LONG_BIT_RUN)
422 bit = get_bits1(gb);
423 else
424 bit ^= 1;
425
115329f1 426 current_run = get_vlc2(gb,
855c720c
DC
427 s->superblock_run_length_vlc.table, 6, 2) + 1;
428 if (current_run == 34)
d8278bab 429 current_run += get_bits(gb, 12);
855c720c
DC
430
431 for (j = 0; j < current_run; current_superblock++) {
432 if (current_superblock >= s->superblock_count) {
433 av_log(s->avctx, AV_LOG_ERROR, "Invalid fully coded superblock run length\n");
434 return -1;
d86053a4 435 }
855c720c
DC
436
437 /* skip any superblocks already marked as partially coded */
438 if (s->superblock_coding[current_superblock] == SB_NOT_CODED) {
b5da3635 439 s->superblock_coding[current_superblock] = 2*bit;
855c720c
DC
440 j++;
441 }
d86053a4 442 }
855c720c 443 superblocks_decoded += current_run;
d86053a4
MM
444 }
445 }
446
447 /* if there were partial blocks, initialize bitstream for
448 * unpacking fragment codings */
855c720c 449 if (num_partial_superblocks) {
d86053a4
MM
450
451 current_run = 0;
5fc32c27 452 bit = get_bits1(gb);
115329f1 453 /* toggle the bit because as soon as the first run length is
d86053a4
MM
454 * fetched the bit will be toggled again */
455 bit ^= 1;
456 }
457 }
458
459 /* figure out which fragments are coded; iterate through each
460 * superblock (all planes) */
c72625f2 461 s->total_num_coded_frags = 0;
96a7e73b 462 memset(s->macroblock_coding, MODE_COPY, s->macroblock_count);
35c28d23
DC
463
464 for (plane = 0; plane < 3; plane++) {
e2720b6b 465 int sb_start = superblock_starts[plane];
35c28d23 466 int sb_end = sb_start + (plane ? s->c_superblock_count : s->y_superblock_count);
c72625f2 467 int num_coded_frags = 0;
35c28d23 468
60867312 469 for (i = sb_start; i < sb_end && get_bits_left(gb) > 0; i++) {
d86053a4
MM
470
471 /* iterate through all 16 fragments in a superblock */
472 for (j = 0; j < 16; j++) {
473
474 /* if the fragment is in bounds, check its coding status */
475 current_fragment = s->superblock_fragments[i * 16 + j];
476 if (current_fragment != -1) {
6cb35b45 477 int coded = s->superblock_coding[i];
d86053a4 478
6cb35b45 479 if (s->superblock_coding[i] == SB_PARTIALLY_CODED) {
d86053a4
MM
480
481 /* fragment may or may not be coded; this is the case
482 * that cares about the fragment coding runs */
b5da3635 483 if (current_run-- == 0) {
d86053a4 484 bit ^= 1;
115329f1 485 current_run = get_vlc2(gb,
b5da3635 486 s->fragment_run_length_vlc.table, 5, 2);
d86053a4 487 }
6cb35b45
DC
488 coded = bit;
489 }
d86053a4 490
6cb35b45 491 if (coded) {
115329f1 492 /* default mode; actual mode will be decoded in
22493ab9 493 * the next phase */
115329f1 494 s->all_fragments[current_fragment].coding_method =
d86053a4 495 MODE_INTER_NO_MV;
c72625f2 496 s->coded_fragment_list[plane][num_coded_frags++] =
d86053a4 497 current_fragment;
d86053a4
MM
498 } else {
499 /* not coded; copy this fragment from the prior frame */
500 s->all_fragments[current_fragment].coding_method =
501 MODE_COPY;
d86053a4 502 }
d86053a4
MM
503 }
504 }
505 }
c72625f2
DC
506 s->total_num_coded_frags += num_coded_frags;
507 for (i = 0; i < 64; i++)
508 s->num_coded_frags[plane][i] = num_coded_frags;
509 if (plane < 2)
510 s->coded_fragment_list[plane+1] = s->coded_fragment_list[plane] + num_coded_frags;
35c28d23 511 }
892fc83e 512 return 0;
d86053a4
MM
513}
514
515/*
516 * This function unpacks all the coding mode data for individual macroblocks
517 * from the bitstream.
518 */
892fc83e 519static int unpack_modes(Vp3DecodeContext *s, GetBitContext *gb)
d86053a4 520{
19cd517d 521 int i, j, k, sb_x, sb_y;
d86053a4
MM
522 int scheme;
523 int current_macroblock;
524 int current_fragment;
525 int coding_mode;
e8e47435 526 int custom_mode_alphabet[CODING_MODE_COUNT];
7c2e31d1 527 const int *alphabet;
1e76a1da 528 Vp3Fragment *frag;
d86053a4 529
d86053a4 530 if (s->keyframe) {
d86053a4
MM
531 for (i = 0; i < s->fragment_count; i++)
532 s->all_fragments[i].coding_method = MODE_INTRA;
533
534 } else {
535
536 /* fetch the mode coding scheme for this frame */
537 scheme = get_bits(gb, 3);
d86053a4
MM
538
539 /* is it a custom coding scheme? */
540 if (scheme == 0) {
d86053a4 541 for (i = 0; i < 8; i++)
2c823b3c
AC
542 custom_mode_alphabet[i] = MODE_INTER_NO_MV;
543 for (i = 0; i < 8; i++)
e8e47435 544 custom_mode_alphabet[get_bits(gb, 3)] = i;
7c2e31d1
DC
545 alphabet = custom_mode_alphabet;
546 } else
547 alphabet = ModeAlphabet[scheme-1];
d86053a4 548
d86053a4
MM
549 /* iterate through all of the macroblocks that contain 1 or more
550 * coded fragments */
19cd517d
DC
551 for (sb_y = 0; sb_y < s->y_superblock_height; sb_y++) {
552 for (sb_x = 0; sb_x < s->y_superblock_width; sb_x++) {
60867312
DC
553 if (get_bits_left(gb) <= 0)
554 return -1;
d86053a4
MM
555
556 for (j = 0; j < 4; j++) {
19cd517d
DC
557 int mb_x = 2*sb_x + (j>>1);
558 int mb_y = 2*sb_y + (((j>>1)+j)&1);
559 current_macroblock = mb_y * s->macroblock_width + mb_x;
560
15675ce6 561 if (mb_x >= s->macroblock_width || mb_y >= s->macroblock_height)
d86053a4
MM
562 continue;
563
ea676144
DC
564#define BLOCK_X (2*mb_x + (k&1))
565#define BLOCK_Y (2*mb_y + (k>>1))
15675ce6
DC
566 /* coding modes are only stored if the macroblock has at least one
567 * luma block coded, otherwise it must be INTER_NO_MV */
568 for (k = 0; k < 4; k++) {
57783884 569 current_fragment = BLOCK_Y*s->fragment_width[0] + BLOCK_X;
15675ce6
DC
570 if (s->all_fragments[current_fragment].coding_method != MODE_COPY)
571 break;
572 }
573 if (k == 4) {
574 s->macroblock_coding[current_macroblock] = MODE_INTER_NO_MV;
575 continue;
576 }
ea676144 577
d86053a4
MM
578 /* mode 7 means get 3 bits for each coding mode */
579 if (scheme == 7)
580 coding_mode = get_bits(gb, 3);
581 else
7c2e31d1 582 coding_mode = alphabet
0ad72bdd 583 [get_vlc2(gb, s->mode_code_vlc.table, 3, 3)];
d86053a4 584
96a7e73b 585 s->macroblock_coding[current_macroblock] = coding_mode;
ea676144 586 for (k = 0; k < 4; k++) {
1e76a1da
DC
587 frag = s->all_fragments + BLOCK_Y*s->fragment_width[0] + BLOCK_X;
588 if (frag->coding_method != MODE_COPY)
589 frag->coding_method = coding_mode;
ea676144 590 }
1e76a1da
DC
591
592#define SET_CHROMA_MODES \
593 if (frag[s->fragment_start[1]].coding_method != MODE_COPY) \
594 frag[s->fragment_start[1]].coding_method = coding_mode;\
595 if (frag[s->fragment_start[2]].coding_method != MODE_COPY) \
596 frag[s->fragment_start[2]].coding_method = coding_mode;
597
598 if (s->chroma_y_shift) {
599 frag = s->all_fragments + mb_y*s->fragment_width[1] + mb_x;
600 SET_CHROMA_MODES
601 } else if (s->chroma_x_shift) {
602 frag = s->all_fragments + 2*mb_y*s->fragment_width[1] + mb_x;
603 for (k = 0; k < 2; k++) {
604 SET_CHROMA_MODES
605 frag += s->fragment_width[1];
606 }
607 } else {
608 for (k = 0; k < 4; k++) {
609 frag = s->all_fragments + BLOCK_Y*s->fragment_width[1] + BLOCK_X;
610 SET_CHROMA_MODES
611 }
d86053a4 612 }
d86053a4 613 }
19cd517d 614 }
d86053a4
MM
615 }
616 }
892fc83e
MM
617
618 return 0;
44ae98dd
MM
619}
620
621/*
d86053a4
MM
622 * This function unpacks all the motion vectors for the individual
623 * macroblocks from the bitstream.
624 */
892fc83e 625static int unpack_vectors(Vp3DecodeContext *s, GetBitContext *gb)
d86053a4 626{
eb691ef2 627 int j, k, sb_x, sb_y;
d86053a4 628 int coding_mode;
1c183aa4
DC
629 int motion_x[4];
630 int motion_y[4];
d86053a4
MM
631 int last_motion_x = 0;
632 int last_motion_y = 0;
633 int prior_last_motion_x = 0;
634 int prior_last_motion_y = 0;
635 int current_macroblock;
636 int current_fragment;
14268254 637 int frag;
d86053a4 638
6599e2a7 639 if (s->keyframe)
6298f49f 640 return 0;
10f38380 641
1ae4518d
DC
642 /* coding mode 0 is the VLC scheme; 1 is the fixed code scheme */
643 coding_mode = get_bits1(gb);
d86053a4 644
1ae4518d
DC
645 /* iterate through all of the macroblocks that contain 1 or more
646 * coded fragments */
19cd517d
DC
647 for (sb_y = 0; sb_y < s->y_superblock_height; sb_y++) {
648 for (sb_x = 0; sb_x < s->y_superblock_width; sb_x++) {
60867312
DC
649 if (get_bits_left(gb) <= 0)
650 return -1;
d86053a4 651
1ae4518d 652 for (j = 0; j < 4; j++) {
19cd517d
DC
653 int mb_x = 2*sb_x + (j>>1);
654 int mb_y = 2*sb_y + (((j>>1)+j)&1);
655 current_macroblock = mb_y * s->macroblock_width + mb_x;
656
657 if (mb_x >= s->macroblock_width || mb_y >= s->macroblock_height ||
1ae4518d
DC
658 (s->macroblock_coding[current_macroblock] == MODE_COPY))
659 continue;
d86053a4 660
1ae4518d
DC
661 switch (s->macroblock_coding[current_macroblock]) {
662
663 case MODE_INTER_PLUS_MV:
664 case MODE_GOLDEN_MV:
665 /* all 6 fragments use the same motion vector */
666 if (coding_mode == 0) {
667 motion_x[0] = motion_vector_table[get_vlc2(gb, s->motion_vector_vlc.table, 6, 2)];
668 motion_y[0] = motion_vector_table[get_vlc2(gb, s->motion_vector_vlc.table, 6, 2)];
669 } else {
670 motion_x[0] = fixed_motion_vector_table[get_bits(gb, 6)];
671 motion_y[0] = fixed_motion_vector_table[get_bits(gb, 6)];
892fc83e 672 }
7f9926a4 673
1ae4518d
DC
674 /* vector maintenance, only on MODE_INTER_PLUS_MV */
675 if (s->macroblock_coding[current_macroblock] ==
676 MODE_INTER_PLUS_MV) {
e32e2d56
AJ
677 prior_last_motion_x = last_motion_x;
678 prior_last_motion_y = last_motion_y;
1ae4518d
DC
679 last_motion_x = motion_x[0];
680 last_motion_y = motion_y[0];
681 }
682 break;
683
684 case MODE_INTER_FOURMV:
685 /* vector maintenance */
686 prior_last_motion_x = last_motion_x;
687 prior_last_motion_y = last_motion_y;
688
689 /* fetch 4 vectors from the bitstream, one for each
690 * Y fragment, then average for the C fragment vectors */
1ae4518d 691 for (k = 0; k < 4; k++) {
57783884 692 current_fragment = BLOCK_Y*s->fragment_width[0] + BLOCK_X;
eb691ef2 693 if (s->all_fragments[current_fragment].coding_method != MODE_COPY) {
1ae4518d
DC
694 if (coding_mode == 0) {
695 motion_x[k] = motion_vector_table[get_vlc2(gb, s->motion_vector_vlc.table, 6, 2)];
696 motion_y[k] = motion_vector_table[get_vlc2(gb, s->motion_vector_vlc.table, 6, 2)];
feaf1a73 697 } else {
1ae4518d
DC
698 motion_x[k] = fixed_motion_vector_table[get_bits(gb, 6)];
699 motion_y[k] = fixed_motion_vector_table[get_bits(gb, 6)];
feaf1a73 700 }
1ae4518d
DC
701 last_motion_x = motion_x[k];
702 last_motion_y = motion_y[k];
703 } else {
704 motion_x[k] = 0;
705 motion_y[k] = 0;
d86053a4 706 }
1ae4518d 707 }
1ae4518d
DC
708 break;
709
710 case MODE_INTER_LAST_MV:
711 /* all 6 fragments use the last motion vector */
712 motion_x[0] = last_motion_x;
713 motion_y[0] = last_motion_y;
d86053a4 714
1ae4518d
DC
715 /* no vector maintenance (last vector remains the
716 * last vector) */
717 break;
718
719 case MODE_INTER_PRIOR_LAST:
720 /* all 6 fragments use the motion vector prior to the
721 * last motion vector */
722 motion_x[0] = prior_last_motion_x;
723 motion_y[0] = prior_last_motion_y;
d86053a4 724
1ae4518d
DC
725 /* vector maintenance */
726 prior_last_motion_x = last_motion_x;
727 prior_last_motion_y = last_motion_y;
728 last_motion_x = motion_x[0];
729 last_motion_y = motion_y[0];
730 break;
44ae98dd 731
1ae4518d
DC
732 default:
733 /* covers intra, inter without MV, golden without MV */
e6e32bdc
MM
734 motion_x[0] = 0;
735 motion_y[0] = 0;
44ae98dd 736
1ae4518d
DC
737 /* no vector maintenance */
738 break;
739 }
d86053a4 740
1ae4518d 741 /* assign the motion vectors to the correct fragments */
ea676144 742 for (k = 0; k < 4; k++) {
1ae4518d 743 current_fragment =
57783884 744 BLOCK_Y*s->fragment_width[0] + BLOCK_X;
e6e32bdc 745 if (s->macroblock_coding[current_macroblock] == MODE_INTER_FOURMV) {
14268254
DC
746 s->motion_val[0][current_fragment][0] = motion_x[k];
747 s->motion_val[0][current_fragment][1] = motion_y[k];
e6e32bdc 748 } else {
14268254
DC
749 s->motion_val[0][current_fragment][0] = motion_x[0];
750 s->motion_val[0][current_fragment][1] = motion_y[0];
e6e32bdc 751 }
d86053a4 752 }
1e76a1da 753
1e76a1da 754 if (s->chroma_y_shift) {
1c183aa4
DC
755 if (s->macroblock_coding[current_macroblock] == MODE_INTER_FOURMV) {
756 motion_x[0] = RSHIFT(motion_x[0] + motion_x[1] + motion_x[2] + motion_x[3], 2);
757 motion_y[0] = RSHIFT(motion_y[0] + motion_y[1] + motion_y[2] + motion_y[3], 2);
758 }
1e76a1da
DC
759 motion_x[0] = (motion_x[0]>>1) | (motion_x[0]&1);
760 motion_y[0] = (motion_y[0]>>1) | (motion_y[0]&1);
14268254
DC
761 frag = mb_y*s->fragment_width[1] + mb_x;
762 s->motion_val[1][frag][0] = motion_x[0];
763 s->motion_val[1][frag][1] = motion_y[0];
1e76a1da
DC
764 } else if (s->chroma_x_shift) {
765 if (s->macroblock_coding[current_macroblock] == MODE_INTER_FOURMV) {
766 motion_x[0] = RSHIFT(motion_x[0] + motion_x[1], 1);
767 motion_y[0] = RSHIFT(motion_y[0] + motion_y[1], 1);
768 motion_x[1] = RSHIFT(motion_x[2] + motion_x[3], 1);
769 motion_y[1] = RSHIFT(motion_y[2] + motion_y[3], 1);
770 } else {
771 motion_x[1] = motion_x[0];
772 motion_y[1] = motion_y[0];
773 }
774 motion_x[0] = (motion_x[0]>>1) | (motion_x[0]&1);
775 motion_x[1] = (motion_x[1]>>1) | (motion_x[1]&1);
776
14268254 777 frag = 2*mb_y*s->fragment_width[1] + mb_x;
1e76a1da 778 for (k = 0; k < 2; k++) {
14268254
DC
779 s->motion_val[1][frag][0] = motion_x[k];
780 s->motion_val[1][frag][1] = motion_y[k];
1e76a1da
DC
781 frag += s->fragment_width[1];
782 }
783 } else {
784 for (k = 0; k < 4; k++) {
14268254 785 frag = BLOCK_Y*s->fragment_width[1] + BLOCK_X;
1e76a1da 786 if (s->macroblock_coding[current_macroblock] == MODE_INTER_FOURMV) {
14268254
DC
787 s->motion_val[1][frag][0] = motion_x[k];
788 s->motion_val[1][frag][1] = motion_y[k];
1e76a1da 789 } else {
14268254
DC
790 s->motion_val[1][frag][0] = motion_x[0];
791 s->motion_val[1][frag][1] = motion_y[0];
1e76a1da
DC
792 }
793 }
ea676144 794 }
d86053a4 795 }
19cd517d 796 }
1ae4518d 797 }
892fc83e
MM
798
799 return 0;
d86053a4
MM
800}
801
f2264fa5
DC
802static int unpack_block_qpis(Vp3DecodeContext *s, GetBitContext *gb)
803{
804 int qpi, i, j, bit, run_length, blocks_decoded, num_blocks_at_qpi;
c72625f2 805 int num_blocks = s->total_num_coded_frags;
f2264fa5
DC
806
807 for (qpi = 0; qpi < s->nqps-1 && num_blocks > 0; qpi++) {
808 i = blocks_decoded = num_blocks_at_qpi = 0;
809
cc46005f
DC
810 bit = get_bits1(gb) ^ 1;
811 run_length = 0;
f2264fa5
DC
812
813 do {
cc46005f
DC
814 if (run_length == MAXIMUM_LONG_BIT_RUN)
815 bit = get_bits1(gb);
816 else
817 bit ^= 1;
818
f2264fa5
DC
819 run_length = get_vlc2(gb, s->superblock_run_length_vlc.table, 6, 2) + 1;
820 if (run_length == 34)
821 run_length += get_bits(gb, 12);
822 blocks_decoded += run_length;
823
824 if (!bit)
825 num_blocks_at_qpi += run_length;
826
827 for (j = 0; j < run_length; i++) {
c72625f2 828 if (i >= s->total_num_coded_frags)
f2264fa5
DC
829 return -1;
830
c72625f2
DC
831 if (s->all_fragments[s->coded_fragment_list[0][i]].qpi == qpi) {
832 s->all_fragments[s->coded_fragment_list[0][i]].qpi += bit;
f2264fa5
DC
833 j++;
834 }
835 }
60867312 836 } while (blocks_decoded < num_blocks && get_bits_left(gb) > 0);
f2264fa5
DC
837
838 num_blocks -= num_blocks_at_qpi;
839 }
840
841 return 0;
842}
843
115329f1 844/*
d86053a4
MM
845 * This function is called by unpack_dct_coeffs() to extract the VLCs from
846 * the bitstream. The VLCs encode tokens which are used to unpack DCT
847 * data. This function unpacks all the VLCs for either the Y plane or both
848 * C planes, and is called for DC coefficients or different AC coefficient
849 * levels (since different coefficient types require different VLC tables.
850 *
851 * This function returns a residual eob run. E.g, if a particular token gave
852 * instructions to EOB the next 5 fragments and there were only 2 fragments
853 * left in the current fragment range, 3 would be returned so that it could
854 * be passed into the next call to this same function.
855 */
856static int unpack_vlcs(Vp3DecodeContext *s, GetBitContext *gb,
857 VLC *table, int coeff_index,
c72625f2 858 int plane,
d86053a4
MM
859 int eob_run)
860{
c72625f2 861 int i, j = 0;
d86053a4 862 int token;
d3076955
MM
863 int zero_run = 0;
864 DCTELEM coeff = 0;
d3076955 865 int bits_to_get;
c72625f2
DC
866 int blocks_ended;
867 int coeff_i = 0;
868 int num_coeffs = s->num_coded_frags[plane][coeff_index];
869 int16_t *dct_tokens = s->dct_tokens[plane][coeff_index];
d86053a4 870
ee3d7f58 871 /* local references to structure members to avoid repeated deferences */
c72625f2 872 int *coded_fragment_list = s->coded_fragment_list[plane];
ee3d7f58 873 Vp3Fragment *all_fragments = s->all_fragments;
ee3d7f58
MM
874 VLC_TYPE (*vlc_table)[2] = table->table;
875
c72625f2
DC
876 if (num_coeffs < 0)
877 av_log(s->avctx, AV_LOG_ERROR, "Invalid number of coefficents at level %d\n", coeff_index);
878
879 if (eob_run > num_coeffs) {
880 coeff_i = blocks_ended = num_coeffs;
881 eob_run -= num_coeffs;
098523eb 882 } else {
c72625f2
DC
883 coeff_i = blocks_ended = eob_run;
884 eob_run = 0;
74c0ac12
MM
885 }
886
c72625f2
DC
887 // insert fake EOB token to cover the split between planes or zzi
888 if (blocks_ended)
889 dct_tokens[j++] = blocks_ended << 2;
d86053a4 890
f50dafa8 891 while (coeff_i < num_coeffs && get_bits_left(gb) > 0) {
d86053a4 892 /* decode a VLC into a token */
8e6daa4a 893 token = get_vlc2(gb, vlc_table, 11, 3);
d86053a4 894 /* use the token to get a zero run, a coefficient, and an eob run */
8370e426 895 if ((unsigned) token <= 6U) {
d3076955
MM
896 eob_run = eob_run_base[token];
897 if (eob_run_get_bits[token])
898 eob_run += get_bits(gb, eob_run_get_bits[token]);
c72625f2
DC
899
900 // record only the number of blocks ended in this plane,
901 // any spill will be recorded in the next plane.
902 if (eob_run > num_coeffs - coeff_i) {
903 dct_tokens[j++] = TOKEN_EOB(num_coeffs - coeff_i);
904 blocks_ended += num_coeffs - coeff_i;
905 eob_run -= num_coeffs - coeff_i;
906 coeff_i = num_coeffs;
907 } else {
908 dct_tokens[j++] = TOKEN_EOB(eob_run);
909 blocks_ended += eob_run;
910 coeff_i += eob_run;
911 eob_run = 0;
912 }
8370e426 913 } else if (token >= 0) {
d3076955 914 bits_to_get = coeff_get_bits[token];
428984b0
MM
915 if (bits_to_get)
916 bits_to_get = get_bits(gb, bits_to_get);
917 coeff = coeff_tables[token][bits_to_get];
d3076955
MM
918
919 zero_run = zero_run_base[token];
920 if (zero_run_get_bits[token])
921 zero_run += get_bits(gb, zero_run_get_bits[token]);
d86053a4 922
c72625f2
DC
923 if (zero_run) {
924 dct_tokens[j++] = TOKEN_ZERO_RUN(coeff, zero_run);
925 } else {
926 // Save DC into the fragment structure. DC prediction is
927 // done in raster order, so the actual DC can't be in with
928 // other tokens. We still need the token in dct_tokens[]
929 // however, or else the structure collapses on itself.
930 if (!coeff_index)
931 all_fragments[coded_fragment_list[coeff_i]].dc = coeff;
932
933 dct_tokens[j++] = TOKEN_COEFF(coeff);
934 }
935
936 if (coeff_index + zero_run > 64) {
01f9640b 937 av_log(s->avctx, AV_LOG_DEBUG, "Invalid zero run of %d with"
c72625f2
DC
938 " %d coeffs left\n", zero_run, 64-coeff_index);
939 zero_run = 64 - coeff_index;
940 }
098523eb 941
c72625f2
DC
942 // zero runs code multiple coefficients,
943 // so don't try to decode coeffs for those higher levels
944 for (i = coeff_index+1; i <= coeff_index+zero_run; i++)
945 s->num_coded_frags[plane][i]--;
946 coeff_i++;
8370e426
RB
947 } else {
948 av_log(s->avctx, AV_LOG_ERROR,
949 "Invalid token %d\n", token);
950 return -1;
c72625f2 951 }
d86053a4
MM
952 }
953
c72625f2
DC
954 if (blocks_ended > s->num_coded_frags[plane][coeff_index])
955 av_log(s->avctx, AV_LOG_ERROR, "More blocks ended than coded!\n");
956
957 // decrement the number of blocks that have higher coeffecients for each
958 // EOB run at this level
959 if (blocks_ended)
960 for (i = coeff_index+1; i < 64; i++)
961 s->num_coded_frags[plane][i] -= blocks_ended;
962
963 // setup the next buffer
964 if (plane < 2)
965 s->dct_tokens[plane+1][coeff_index] = dct_tokens + j;
966 else if (coeff_index < 63)
967 s->dct_tokens[0][coeff_index+1] = dct_tokens + j;
968
d86053a4
MM
969 return eob_run;
970}
971
138fe832
MM
972static void reverse_dc_prediction(Vp3DecodeContext *s,
973 int first_fragment,
974 int fragment_width,
975 int fragment_height);
d86053a4
MM
976/*
977 * This function unpacks all of the DCT coefficient data from the
978 * bitstream.
979 */
892fc83e 980static int unpack_dct_coeffs(Vp3DecodeContext *s, GetBitContext *gb)
d86053a4
MM
981{
982 int i;
983 int dc_y_table;
984 int dc_c_table;
985 int ac_y_table;
986 int ac_c_table;
987 int residual_eob_run = 0;
9d8bb031
MM
988 VLC *y_tables[64];
989 VLC *c_tables[64];
d86053a4 990
c72625f2
DC
991 s->dct_tokens[0][0] = s->dct_tokens_base;
992
f4433de9 993 /* fetch the DC table indexes */
d86053a4
MM
994 dc_y_table = get_bits(gb, 4);
995 dc_c_table = get_bits(gb, 4);
996
997 /* unpack the Y plane DC coefficients */
115329f1 998 residual_eob_run = unpack_vlcs(s, gb, &s->dc_vlc[dc_y_table], 0,
c72625f2 999 0, residual_eob_run);
8370e426
RB
1000 if (residual_eob_run < 0)
1001 return residual_eob_run;
d86053a4 1002
138fe832 1003 /* reverse prediction of the Y-plane DC coefficients */
57783884 1004 reverse_dc_prediction(s, 0, s->fragment_width[0], s->fragment_height[0]);
138fe832 1005
d86053a4 1006 /* unpack the C plane DC coefficients */
d86053a4 1007 residual_eob_run = unpack_vlcs(s, gb, &s->dc_vlc[dc_c_table], 0,
c72625f2 1008 1, residual_eob_run);
8370e426
RB
1009 if (residual_eob_run < 0)
1010 return residual_eob_run;
c72625f2
DC
1011 residual_eob_run = unpack_vlcs(s, gb, &s->dc_vlc[dc_c_table], 0,
1012 2, residual_eob_run);
8370e426
RB
1013 if (residual_eob_run < 0)
1014 return residual_eob_run;
d86053a4 1015
138fe832
MM
1016 /* reverse prediction of the C-plane DC coefficients */
1017 if (!(s->avctx->flags & CODEC_FLAG_GRAY))
1018 {
1019 reverse_dc_prediction(s, s->fragment_start[1],
57783884 1020 s->fragment_width[1], s->fragment_height[1]);
138fe832 1021 reverse_dc_prediction(s, s->fragment_start[2],
57783884 1022 s->fragment_width[1], s->fragment_height[1]);
138fe832
MM
1023 }
1024
f4433de9 1025 /* fetch the AC table indexes */
d86053a4
MM
1026 ac_y_table = get_bits(gb, 4);
1027 ac_c_table = get_bits(gb, 4);
1028
9d8bb031 1029 /* build tables of AC VLC tables */
d86053a4 1030 for (i = 1; i <= 5; i++) {
9d8bb031
MM
1031 y_tables[i] = &s->ac_vlc_1[ac_y_table];
1032 c_tables[i] = &s->ac_vlc_1[ac_c_table];
d86053a4 1033 }
d86053a4 1034 for (i = 6; i <= 14; i++) {
9d8bb031
MM
1035 y_tables[i] = &s->ac_vlc_2[ac_y_table];
1036 c_tables[i] = &s->ac_vlc_2[ac_c_table];
d86053a4 1037 }
d86053a4 1038 for (i = 15; i <= 27; i++) {
9d8bb031
MM
1039 y_tables[i] = &s->ac_vlc_3[ac_y_table];
1040 c_tables[i] = &s->ac_vlc_3[ac_c_table];
d86053a4 1041 }
d86053a4 1042 for (i = 28; i <= 63; i++) {
9d8bb031
MM
1043 y_tables[i] = &s->ac_vlc_4[ac_y_table];
1044 c_tables[i] = &s->ac_vlc_4[ac_c_table];
1045 }
1046
1047 /* decode all AC coefficents */
1048 for (i = 1; i <= 63; i++) {
9d8bb031 1049 residual_eob_run = unpack_vlcs(s, gb, y_tables[i], i,
c72625f2 1050 0, residual_eob_run);
8370e426
RB
1051 if (residual_eob_run < 0)
1052 return residual_eob_run;
d86053a4 1053
9d8bb031 1054 residual_eob_run = unpack_vlcs(s, gb, c_tables[i], i,
c72625f2 1055 1, residual_eob_run);
8370e426
RB
1056 if (residual_eob_run < 0)
1057 return residual_eob_run;
c72625f2
DC
1058 residual_eob_run = unpack_vlcs(s, gb, c_tables[i], i,
1059 2, residual_eob_run);
8370e426
RB
1060 if (residual_eob_run < 0)
1061 return residual_eob_run;
d86053a4 1062 }
892fc83e
MM
1063
1064 return 0;
d86053a4
MM
1065}
1066
1067/*
1068 * This function reverses the DC prediction for each coded fragment in
115329f1 1069 * the frame. Much of this function is adapted directly from the original
d86053a4
MM
1070 * VP3 source code.
1071 */
1072#define COMPATIBLE_FRAME(x) \
1073 (compatible_frame[s->all_fragments[x].coding_method] == current_frame_type)
c72625f2 1074#define DC_COEFF(u) s->all_fragments[u].dc
d86053a4
MM
1075
1076static void reverse_dc_prediction(Vp3DecodeContext *s,
1077 int first_fragment,
1078 int fragment_width,
115329f1 1079 int fragment_height)
d86053a4
MM
1080{
1081
1082#define PUL 8
1083#define PU 4
1084#define PUR 2
1085#define PL 1
1086
1087 int x, y;
1088 int i = first_fragment;
1089
59ef342b 1090 int predicted_dc;
d86053a4 1091
d86053a4
MM
1092 /* DC values for the left, up-left, up, and up-right fragments */
1093 int vl, vul, vu, vur;
1094
f4433de9 1095 /* indexes for the left, up-left, up, and up-right fragments */
d86053a4
MM
1096 int l, ul, u, ur;
1097
115329f1 1098 /*
d86053a4
MM
1099 * The 6 fields mean:
1100 * 0: up-left multiplier
1101 * 1: up multiplier
1102 * 2: up-right multiplier
1103 * 3: left multiplier
d86053a4 1104 */
bb991087 1105 static const int predictor_transform[16][4] = {
006ff1ca
MN
1106 { 0, 0, 0, 0},
1107 { 0, 0, 0,128}, // PL
1108 { 0, 0,128, 0}, // PUR
1109 { 0, 0, 53, 75}, // PUR|PL
1110 { 0,128, 0, 0}, // PU
1111 { 0, 64, 0, 64}, // PU|PL
1112 { 0,128, 0, 0}, // PU|PUR
1113 { 0, 0, 53, 75}, // PU|PUR|PL
1114 {128, 0, 0, 0}, // PUL
1115 { 0, 0, 0,128}, // PUL|PL
1116 { 64, 0, 64, 0}, // PUL|PUR
1117 { 0, 0, 53, 75}, // PUL|PUR|PL
1118 { 0,128, 0, 0}, // PUL|PU
1119 {-104,116, 0,116}, // PUL|PU|PL
1120 { 24, 80, 24, 0}, // PUL|PU|PUR
1121 {-104,116, 0,116} // PUL|PU|PUR|PL
d86053a4
MM
1122 };
1123
1124 /* This table shows which types of blocks can use other blocks for
1125 * prediction. For example, INTRA is the only mode in this table to
1126 * have a frame number of 0. That means INTRA blocks can only predict
115329f1 1127 * from other INTRA blocks. There are 2 golden frame coding types;
d86053a4
MM
1128 * blocks encoding in these modes can only predict from other blocks
1129 * that were encoded with these 1 of these 2 modes. */
50ba3fd7 1130 static const unsigned char compatible_frame[9] = {
d86053a4
MM
1131 1, /* MODE_INTER_NO_MV */
1132 0, /* MODE_INTRA */
1133 1, /* MODE_INTER_PLUS_MV */
1134 1, /* MODE_INTER_LAST_MV */
1135 1, /* MODE_INTER_PRIOR_MV */
1136 2, /* MODE_USING_GOLDEN */
1137 2, /* MODE_GOLDEN_MV */
50ba3fd7
JGG
1138 1, /* MODE_INTER_FOUR_MV */
1139 3 /* MODE_COPY */
d86053a4
MM
1140 };
1141 int current_frame_type;
1142
1143 /* there is a last DC predictor for each of the 3 frame types */
1144 short last_dc[3];
1145
1146 int transform = 0;
1147
d86053a4
MM
1148 vul = vu = vur = vl = 0;
1149 last_dc[0] = last_dc[1] = last_dc[2] = 0;
1150
1151 /* for each fragment row... */
1152 for (y = 0; y < fragment_height; y++) {
1153
1154 /* for each fragment in a row... */
1155 for (x = 0; x < fragment_width; x++, i++) {
1156
1157 /* reverse prediction if this block was coded */
1158 if (s->all_fragments[i].coding_method != MODE_COPY) {
1159
115329f1 1160 current_frame_type =
d86053a4 1161 compatible_frame[s->all_fragments[i].coding_method];
d86053a4 1162
f72f8a77
MN
1163 transform= 0;
1164 if(x){
1165 l= i-1;
7beddb12 1166 vl = DC_COEFF(l);
50ba3fd7 1167 if(COMPATIBLE_FRAME(l))
006ff1ca 1168 transform |= PL;
f72f8a77
MN
1169 }
1170 if(y){
1171 u= i-fragment_width;
7beddb12 1172 vu = DC_COEFF(u);
50ba3fd7 1173 if(COMPATIBLE_FRAME(u))
006ff1ca 1174 transform |= PU;
f72f8a77
MN
1175 if(x){
1176 ul= i-fragment_width-1;
1177 vul = DC_COEFF(ul);
50ba3fd7 1178 if(COMPATIBLE_FRAME(ul))
006ff1ca 1179 transform |= PUL;
f72f8a77
MN
1180 }
1181 if(x + 1 < fragment_width){
1182 ur= i-fragment_width+1;
1183 vur = DC_COEFF(ur);
50ba3fd7 1184 if(COMPATIBLE_FRAME(ur))
006ff1ca 1185 transform |= PUR;
f72f8a77 1186 }
d86053a4
MM
1187 }
1188
d86053a4
MM
1189 if (transform == 0) {
1190
1191 /* if there were no fragments to predict from, use last
1192 * DC saved */
7beddb12 1193 predicted_dc = last_dc[current_frame_type];
d86053a4
MM
1194 } else {
1195
1196 /* apply the appropriate predictor transform */
1197 predicted_dc =
1198 (predictor_transform[transform][0] * vul) +
1199 (predictor_transform[transform][1] * vu) +
1200 (predictor_transform[transform][2] * vur) +
1201 (predictor_transform[transform][3] * vl);
1202
684d9e36 1203 predicted_dc /= 128;
d86053a4
MM
1204
1205 /* check for outranging on the [ul u l] and
1206 * [ul u ur l] predictors */
c11cb375 1207 if ((transform == 15) || (transform == 13)) {
c26abfa5 1208 if (FFABS(predicted_dc - vu) > 128)
d86053a4 1209 predicted_dc = vu;
c26abfa5 1210 else if (FFABS(predicted_dc - vl) > 128)
d86053a4 1211 predicted_dc = vl;
c26abfa5 1212 else if (FFABS(predicted_dc - vul) > 128)
d86053a4
MM
1213 predicted_dc = vul;
1214 }
d86053a4
MM
1215 }
1216
7beddb12 1217 /* at long last, apply the predictor */
c72625f2 1218 DC_COEFF(i) += predicted_dc;
d86053a4 1219 /* save the DC */
7beddb12 1220 last_dc[current_frame_type] = DC_COEFF(i);
d86053a4
MM
1221 }
1222 }
1223 }
1224}
1225
256c0662 1226static void apply_loop_filter(Vp3DecodeContext *s, int plane, int ystart, int yend)
fe313556 1227{
fe313556
DC
1228 int x, y;
1229 int *bounding_values= s->bounding_values_array+127;
1230
57783884
DC
1231 int width = s->fragment_width[!!plane];
1232 int height = s->fragment_height[!!plane];
621f9a40
DC
1233 int fragment = s->fragment_start [plane] + ystart * width;
1234 int stride = s->current_frame.linesize[plane];
1235 uint8_t *plane_data = s->current_frame.data [plane];
1236 if (!s->flipped_image) stride = -stride;
735acf56 1237 plane_data += s->data_offset[plane] + 8*ystart*stride;
621f9a40
DC
1238
1239 for (y = ystart; y < yend; y++) {
1240
1241 for (x = 0; x < width; x++) {
1242 /* This code basically just deblocks on the edges of coded blocks.
1243 * However, it has to be much more complicated because of the
1244 * braindamaged deblock ordering used in VP3/Theora. Order matters
1245 * because some pixels get filtered twice. */
1246 if( s->all_fragments[fragment].coding_method != MODE_COPY )
1247 {
1248 /* do not perform left edge filter for left columns frags */
1249 if (x > 0) {
1250 s->dsp.vp3_h_loop_filter(
735acf56 1251 plane_data + 8*x,
621f9a40
DC
1252 stride, bounding_values);
1253 }
fe313556 1254
621f9a40
DC
1255 /* do not perform top edge filter for top row fragments */
1256 if (y > 0) {
1257 s->dsp.vp3_v_loop_filter(
735acf56 1258 plane_data + 8*x,
621f9a40
DC
1259 stride, bounding_values);
1260 }
fe313556 1261
621f9a40
DC
1262 /* do not perform right edge filter for right column
1263 * fragments or if right fragment neighbor is also coded
1264 * in this frame (it will be filtered in next iteration) */
1265 if ((x < width - 1) &&
1266 (s->all_fragments[fragment + 1].coding_method == MODE_COPY)) {
1267 s->dsp.vp3_h_loop_filter(
735acf56 1268 plane_data + 8*x + 8,
621f9a40 1269 stride, bounding_values);
fe313556
DC
1270 }
1271
621f9a40
DC
1272 /* do not perform bottom edge filter for bottom row
1273 * fragments or if bottom fragment neighbor is also coded
1274 * in this frame (it will be filtered in the next row) */
1275 if ((y < height - 1) &&
1276 (s->all_fragments[fragment + width].coding_method == MODE_COPY)) {
1277 s->dsp.vp3_v_loop_filter(
735acf56 1278 plane_data + 8*x + 8*stride,
621f9a40
DC
1279 stride, bounding_values);
1280 }
fe313556 1281 }
621f9a40
DC
1282
1283 fragment++;
fe313556 1284 }
735acf56 1285 plane_data += 8*stride;
621f9a40 1286 }
fe313556
DC
1287}
1288
a8de3901 1289/**
49bd8e4b 1290 * Pull DCT tokens from the 64 levels to decode and dequant the coefficients
c72625f2
DC
1291 * for the next block in coding order
1292 */
1293static inline int vp3_dequant(Vp3DecodeContext *s, Vp3Fragment *frag,
1294 int plane, int inter, DCTELEM block[64])
1295{
1296 int16_t *dequantizer = s->qmat[frag->qpi][inter][plane];
1297 uint8_t *perm = s->scantable.permutated;
1298 int i = 0;
1299
1300 do {
1301 int token = *s->dct_tokens[plane][i];
1302 switch (token & 3) {
1303 case 0: // EOB
1304 if (--token < 4) // 0-3 are token types, so the EOB run must now be 0
1305 s->dct_tokens[plane][i]++;
1306 else
1307 *s->dct_tokens[plane][i] = token & ~3;
1308 goto end;
1309 case 1: // zero run
1310 s->dct_tokens[plane][i]++;
1311 i += (token >> 2) & 0x7f;
1312 block[perm[i]] = (token >> 9) * dequantizer[perm[i]];
1313 i++;
1314 break;
1315 case 2: // coeff
1316 block[perm[i]] = (token >> 2) * dequantizer[perm[i]];
1317 s->dct_tokens[plane][i++]++;
1318 break;
d7097c2d 1319 default: // shouldn't happen
c72625f2
DC
1320 return i;
1321 }
1322 } while (i < 64);
1323end:
1324 // the actual DC+prediction is in the fragment structure
1325 block[0] = frag->dc * s->qmat[0][inter][plane][0];
1326 return i;
1327}
1328
1329/**
a8de3901
DC
1330 * called when all pixels up to row y are complete
1331 */
1332static void vp3_draw_horiz_band(Vp3DecodeContext *s, int y)
1333{
560f773c
JR
1334 int h, cy, i;
1335 int offset[AV_NUM_DATA_POINTERS];
a8de3901 1336
27237d52 1337 if (HAVE_THREADS && s->avctx->active_thread_type&FF_THREAD_FRAME) {
d23845f3
AS
1338 int y_flipped = s->flipped_image ? s->avctx->height-y : y;
1339
1340 // At the end of the frame, report INT_MAX instead of the height of the frame.
1341 // This makes the other threads' ff_thread_await_progress() calls cheaper, because
1342 // they don't have to clip their values.
1343 ff_thread_report_progress(&s->current_frame, y_flipped==s->avctx->height ? INT_MAX : y_flipped-1, 0);
1344 }
1345
a8de3901
DC
1346 if(s->avctx->draw_horiz_band==NULL)
1347 return;
1348
1349 h= y - s->last_slice_end;
3b9ee20f 1350 s->last_slice_end= y;
a8de3901
DC
1351 y -= h;
1352
1353 if (!s->flipped_image) {
83f72f13 1354 y = s->avctx->height - y - h;
a8de3901
DC
1355 }
1356
8764389d 1357 cy = y >> s->chroma_y_shift;
a8de3901
DC
1358 offset[0] = s->current_frame.linesize[0]*y;
1359 offset[1] = s->current_frame.linesize[1]*cy;
1360 offset[2] = s->current_frame.linesize[2]*cy;
560f773c
JR
1361 for (i = 3; i < AV_NUM_DATA_POINTERS; i++)
1362 offset[i] = 0;
a8de3901
DC
1363
1364 emms_c();
1365 s->avctx->draw_horiz_band(s->avctx, &s->current_frame, offset, y, 3, h);
a8de3901
DC
1366}
1367
d23845f3
AS
1368/**
1369 * Wait for the reference frame of the current fragment.
1370 * The progress value is in luma pixel rows.
1371 */
1372static void await_reference_row(Vp3DecodeContext *s, Vp3Fragment *fragment, int motion_y, int y)
1373{
1374 AVFrame *ref_frame;
1375 int ref_row;
1376 int border = motion_y&1;
1377
1378 if (fragment->coding_method == MODE_USING_GOLDEN ||
1379 fragment->coding_method == MODE_GOLDEN_MV)
1380 ref_frame = &s->golden_frame;
1381 else
1382 ref_frame = &s->last_frame;
1383
1384 ref_row = y + (motion_y>>1);
1385 ref_row = FFMAX(FFABS(ref_row), ref_row + 8 + border);
1386
1387 ff_thread_await_progress(ref_frame, ref_row, 0);
1388}
1389
d86053a4 1390/*
dc4b78d9 1391 * Perform the final rendering for a particular slice of data.
7a095ea6 1392 * The slice number ranges from 0..(c_superblock_height - 1).
dc4b78d9
MM
1393 */
1394static void render_slice(Vp3DecodeContext *s, int slice)
1395{
e8dcd730 1396 int x, y, i, j, fragment;
40d11227 1397 LOCAL_ALIGNED_16(DCTELEM, block, [64]);
dc4b78d9 1398 int motion_x = 0xdeadbeef, motion_y = 0xdeadbeef;
dc4b78d9
MM
1399 int motion_halfpel_index;
1400 uint8_t *motion_source;
7a095ea6 1401 int plane, first_pixel;
dc4b78d9 1402
7a095ea6 1403 if (slice >= s->c_superblock_height)
dc4b78d9
MM
1404 return;
1405
1406 for (plane = 0; plane < 3; plane++) {
735acf56
DC
1407 uint8_t *output_plane = s->current_frame.data [plane] + s->data_offset[plane];
1408 uint8_t * last_plane = s-> last_frame.data [plane] + s->data_offset[plane];
1409 uint8_t *golden_plane = s-> golden_frame.data [plane] + s->data_offset[plane];
1abbf64e 1410 int stride = s->current_frame.linesize[plane];
1e76a1da
DC
1411 int plane_width = s->width >> (plane && s->chroma_x_shift);
1412 int plane_height = s->height >> (plane && s->chroma_y_shift);
14268254 1413 int8_t (*motion_val)[2] = s->motion_val[!!plane];
7a095ea6 1414
1e76a1da
DC
1415 int sb_x, sb_y = slice << (!plane && s->chroma_y_shift);
1416 int slice_height = sb_y + 1 + (!plane && s->chroma_y_shift);
7a095ea6
DC
1417 int slice_width = plane ? s->c_superblock_width : s->y_superblock_width;
1418
57783884
DC
1419 int fragment_width = s->fragment_width[!!plane];
1420 int fragment_height = s->fragment_height[!!plane];
7a095ea6 1421 int fragment_start = s->fragment_start[plane];
27237d52 1422 int do_await = !plane && HAVE_THREADS && (s->avctx->active_thread_type&FF_THREAD_FRAME);
1abbf64e
MN
1423
1424 if (!s->flipped_image) stride = -stride;
161e8cf4
DC
1425 if (CONFIG_GRAY && plane && (s->avctx->flags & CODEC_FLAG_GRAY))
1426 continue;
dc4b78d9 1427
7a095ea6
DC
1428 /* for each superblock row in the slice (both of them)... */
1429 for (; sb_y < slice_height; sb_y++) {
dc4b78d9 1430
7a095ea6
DC
1431 /* for each superblock in a row... */
1432 for (sb_x = 0; sb_x < slice_width; sb_x++) {
dc4b78d9 1433
7a095ea6
DC
1434 /* for each block in a superblock... */
1435 for (j = 0; j < 16; j++) {
1436 x = 4*sb_x + hilbert_offset[j][0];
1437 y = 4*sb_y + hilbert_offset[j][1];
e8dcd730 1438 fragment = y*fragment_width + x;
7a095ea6 1439
e8dcd730 1440 i = fragment_start + fragment;
7a095ea6
DC
1441
1442 // bounds check
1443 if (x >= fragment_width || y >= fragment_height)
1444 continue;
1445
1446 first_pixel = 8*y*stride + 8*x;
dc4b78d9 1447
d23845f3
AS
1448 if (do_await && s->all_fragments[i].coding_method != MODE_INTRA)
1449 await_reference_row(s, &s->all_fragments[i], motion_val[fragment][1], (16*y) >> s->chroma_y_shift);
1450
dc4b78d9 1451 /* transform if this block was coded */
161e8cf4 1452 if (s->all_fragments[i].coding_method != MODE_COPY) {
dc4b78d9
MM
1453 if ((s->all_fragments[i].coding_method == MODE_USING_GOLDEN) ||
1454 (s->all_fragments[i].coding_method == MODE_GOLDEN_MV))
1455 motion_source= golden_plane;
115329f1 1456 else
dc4b78d9
MM
1457 motion_source= last_plane;
1458
735acf56 1459 motion_source += first_pixel;
dc4b78d9
MM
1460 motion_halfpel_index = 0;
1461
1462 /* sort out the motion vector if this fragment is coded
1463 * using a motion vector method */
1464 if ((s->all_fragments[i].coding_method > MODE_INTRA) &&
1465 (s->all_fragments[i].coding_method != MODE_USING_GOLDEN)) {
1466 int src_x, src_y;
e8dcd730
AS
1467 motion_x = motion_val[fragment][0];
1468 motion_y = motion_val[fragment][1];
dc4b78d9 1469
7a095ea6
DC
1470 src_x= (motion_x>>1) + 8*x;
1471 src_y= (motion_y>>1) + 8*y;
dc4b78d9
MM
1472
1473 motion_halfpel_index = motion_x & 0x01;
1474 motion_source += (motion_x >> 1);
1475
1476 motion_halfpel_index |= (motion_y & 0x01) << 1;
1477 motion_source += ((motion_y >> 1) * stride);
1478
1479 if(src_x<0 || src_y<0 || src_x + 9 >= plane_width || src_y + 9 >= plane_height){
1480 uint8_t *temp= s->edge_emu_buffer;
a89f4ca0 1481 if(stride<0) temp -= 8*stride;
dc4b78d9 1482
2e279598 1483 s->dsp.emulated_edge_mc(temp, motion_source, stride, 9, 9, src_x, src_y, plane_width, plane_height);
dc4b78d9
MM
1484 motion_source= temp;
1485 }
1486 }
115329f1 1487
dc4b78d9
MM
1488
1489 /* first, take care of copying a block from either the
1490 * previous or the golden frame */
1491 if (s->all_fragments[i].coding_method != MODE_INTRA) {
115329f1
DB
1492 /* Note, it is possible to implement all MC cases with
1493 put_no_rnd_pixels_l2 which would look more like the
1494 VP3 source but this would be slower as
dc4b78d9
MM
1495 put_no_rnd_pixels_tab is better optimzed */
1496 if(motion_halfpel_index != 3){
1497 s->dsp.put_no_rnd_pixels_tab[1][motion_halfpel_index](
735acf56 1498 output_plane + first_pixel,
dc4b78d9
MM
1499 motion_source, stride, 8);
1500 }else{
1501 int d= (motion_x ^ motion_y)>>31; // d is 0 if motion_x and _y have the same sign, else -1
1502 s->dsp.put_no_rnd_pixels_l2[1](
735acf56 1503 output_plane + first_pixel,
115329f1
DB
1504 motion_source - d,
1505 motion_source + stride + 1 + d,
dc4b78d9
MM
1506 stride, 8);
1507 }
dc4b78d9
MM
1508 }
1509
5fecfb7d 1510 s->dsp.clear_block(block);
dc4b78d9
MM
1511
1512 /* invert DCT and place (or add) in final output */
115329f1 1513
dc4b78d9 1514 if (s->all_fragments[i].coding_method == MODE_INTRA) {
eb6a6cd7 1515 vp3_dequant(s, s->all_fragments + i, plane, 0, block);
dc4b78d9
MM
1516 if(s->avctx->idct_algo!=FF_IDCT_VP3)
1517 block[0] += 128<<3;
1518 s->dsp.idct_put(
735acf56 1519 output_plane + first_pixel,
dc4b78d9
MM
1520 stride,
1521 block);
1522 } else {
eb6a6cd7 1523 if (vp3_dequant(s, s->all_fragments + i, plane, 1, block)) {
dc4b78d9 1524 s->dsp.idct_add(
735acf56 1525 output_plane + first_pixel,
dc4b78d9
MM
1526 stride,
1527 block);
eb6a6cd7
DC
1528 } else {
1529 s->dsp.vp3_idct_dc_add(output_plane + first_pixel, stride, block);
1530 }
dc4b78d9 1531 }
dc4b78d9
MM
1532 } else {
1533
1534 /* copy directly from the previous frame */
1535 s->dsp.put_pixels_tab[1][0](
735acf56
DC
1536 output_plane + first_pixel,
1537 last_plane + first_pixel,
dc4b78d9
MM
1538 stride, 8);
1539
1540 }
7a095ea6 1541 }
dc4b78d9 1542 }
7a095ea6
DC
1543
1544 // Filter up to the last row in the superblock row
a4501a45
DC
1545 if (!s->skip_loop_filter)
1546 apply_loop_filter(s, plane, 4*sb_y - !!sb_y, FFMIN(4*sb_y+3, fragment_height-1));
dc4b78d9
MM
1547 }
1548 }
1549
dc4b78d9
MM
1550 /* this looks like a good place for slice dispatch... */
1551 /* algorithm:
dc4b78d9 1552 * if (slice == s->macroblock_height - 1)
f44b08a5
MM
1553 * dispatch (both last slice & 2nd-to-last slice);
1554 * else if (slice > 0)
1555 * dispatch (slice - 1);
dc4b78d9
MM
1556 */
1557
3d487db1 1558 vp3_draw_horiz_band(s, FFMIN((32 << s->chroma_y_shift) * (slice + 1) -16, s->height-16));
dc4b78d9
MM
1559}
1560
edbb0c07
AS
1561/// Allocate tables for per-frame data in Vp3DecodeContext
1562static av_cold int allocate_tables(AVCodecContext *avctx)
1563{
1564 Vp3DecodeContext *s = avctx->priv_data;
1565 int y_fragment_count, c_fragment_count;
1566
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
1570 s->superblock_coding = av_malloc(s->superblock_count);
1571 s->all_fragments = av_malloc(s->fragment_count * sizeof(Vp3Fragment));
1572 s->coded_fragment_list[0] = av_malloc(s->fragment_count * sizeof(int));
1573 s->dct_tokens_base = av_malloc(64*s->fragment_count * sizeof(*s->dct_tokens_base));
1574 s->motion_val[0] = av_malloc(y_fragment_count * sizeof(*s->motion_val[0]));
1575 s->motion_val[1] = av_malloc(c_fragment_count * sizeof(*s->motion_val[1]));
1576
1577 /* work out the block mapping tables */
1578 s->superblock_fragments = av_malloc(s->superblock_count * 16 * sizeof(int));
1579 s->macroblock_coding = av_malloc(s->macroblock_count + 1);
1580
1581 if (!s->superblock_coding || !s->all_fragments || !s->dct_tokens_base ||
1582 !s->coded_fragment_list[0] || !s->superblock_fragments || !s->macroblock_coding ||
1583 !s->motion_val[0] || !s->motion_val[1]) {
1584 vp3_decode_end(avctx);
1585 return -1;
1586 }
1587
1588 init_block_mapping(s);
1589
1590 return 0;
1591}
1592
98a6fff9 1593static av_cold int vp3_decode_init(AVCodecContext *avctx)
d86053a4
MM
1594{
1595 Vp3DecodeContext *s = avctx->priv_data;
ae1dd8e1 1596 int i, inter, plane;
892fc83e
MM
1597 int c_width;
1598 int c_height;
1e76a1da 1599 int y_fragment_count, c_fragment_count;
d86053a4 1600
3c3f113e 1601 if (avctx->codec_tag == MKTAG('V','P','3','0'))
bb270c08 1602 s->version = 0;
3c3f113e 1603 else
bb270c08 1604 s->version = 1;
3c3f113e 1605
d86053a4 1606 s->avctx = avctx;
ef516f73
DC
1607 s->width = FFALIGN(avctx->width, 16);
1608 s->height = FFALIGN(avctx->height, 16);
1e76a1da
DC
1609 if (avctx->pix_fmt == PIX_FMT_NONE)
1610 avctx->pix_fmt = PIX_FMT_YUV420P;
580a7465 1611 avctx->chroma_sample_location = AVCHROMA_LOC_CENTER;
8b6103da
MN
1612 if(avctx->idct_algo==FF_IDCT_AUTO)
1613 avctx->idct_algo=FF_IDCT_VP3;
d86053a4 1614 dsputil_init(&s->dsp, avctx);
115329f1 1615
36af0c95 1616 ff_init_scantable(s->dsp.idct_permutation, &s->scantable, ff_zigzag_direct);
d86053a4
MM
1617
1618 /* initialize to an impossible value which will force a recalculation
1619 * in the first frame decode */
f2264fa5
DC
1620 for (i = 0; i < 3; i++)
1621 s->qps[i] = -1;
d86053a4 1622
1e76a1da
DC
1623 avcodec_get_chroma_sub_sample(avctx->pix_fmt, &s->chroma_x_shift, &s->chroma_y_shift);
1624
892fc83e
MM
1625 s->y_superblock_width = (s->width + 31) / 32;
1626 s->y_superblock_height = (s->height + 31) / 32;
35c28d23 1627 s->y_superblock_count = s->y_superblock_width * s->y_superblock_height;
892fc83e
MM
1628
1629 /* work out the dimensions for the C planes */
1e76a1da
DC
1630 c_width = s->width >> s->chroma_x_shift;
1631 c_height = s->height >> s->chroma_y_shift;
892fc83e
MM
1632 s->c_superblock_width = (c_width + 31) / 32;
1633 s->c_superblock_height = (c_height + 31) / 32;
35c28d23 1634 s->c_superblock_count = s->c_superblock_width * s->c_superblock_height;
892fc83e 1635
35c28d23
DC
1636 s->superblock_count = s->y_superblock_count + (s->c_superblock_count * 2);
1637 s->u_superblock_start = s->y_superblock_count;
1638 s->v_superblock_start = s->u_superblock_start + s->c_superblock_count;
d86053a4
MM
1639
1640 s->macroblock_width = (s->width + 15) / 16;
1641 s->macroblock_height = (s->height + 15) / 16;
1642 s->macroblock_count = s->macroblock_width * s->macroblock_height;
1643
57783884
DC
1644 s->fragment_width[0] = s->width / FRAGMENT_PIXELS;
1645 s->fragment_height[0] = s->height / FRAGMENT_PIXELS;
1e76a1da
DC
1646 s->fragment_width[1] = s->fragment_width[0] >> s->chroma_x_shift;
1647 s->fragment_height[1] = s->fragment_height[0] >> s->chroma_y_shift;
d86053a4
MM
1648
1649 /* fragment count covers all 8x8 blocks for all 3 planes */
1e76a1da
DC
1650 y_fragment_count = s->fragment_width[0] * s->fragment_height[0];
1651 c_fragment_count = s->fragment_width[1] * s->fragment_height[1];
1652 s->fragment_count = y_fragment_count + 2*c_fragment_count;
1653 s->fragment_start[1] = y_fragment_count;
1654 s->fragment_start[2] = y_fragment_count + c_fragment_count;
d86053a4 1655
f44ee2c3
AB
1656 if (!s->theora_tables)
1657 {
2287c100 1658 for (i = 0; i < 64; i++) {
bb270c08 1659 s->coded_dc_scale_factor[i] = vp31_dc_scale_factor[i];
bb270c08 1660 s->coded_ac_scale_factor[i] = vp31_ac_scale_factor[i];
ae1dd8e1 1661 s->base_matrix[0][i] = vp31_intra_y_dequant[i];
ae1dd8e1 1662 s->base_matrix[1][i] = vp31_intra_c_dequant[i];
ae1dd8e1 1663 s->base_matrix[2][i] = vp31_inter_dequant[i];
bb270c08 1664 s->filter_limit_values[i] = vp31_filter_limit_values[i];
2287c100 1665 }
f44ee2c3 1666
ae1dd8e1
MN
1667 for(inter=0; inter<2; inter++){
1668 for(plane=0; plane<3; plane++){
1669 s->qr_count[inter][plane]= 1;
1670 s->qr_size [inter][plane][0]= 63;
1671 s->qr_base [inter][plane][0]=
1672 s->qr_base [inter][plane][1]= 2*inter + (!!plane)*!inter;
1673 }
1674 }
1675
39922395
MM
1676 /* init VLC tables */
1677 for (i = 0; i < 16; i++) {
1678
1679 /* DC histograms */
8e6daa4a 1680 init_vlc(&s->dc_vlc[i], 11, 32,
39922395
MM
1681 &dc_bias[i][0][1], 4, 2,
1682 &dc_bias[i][0][0], 4, 2, 0);
1683
1684 /* group 1 AC histograms */
8e6daa4a 1685 init_vlc(&s->ac_vlc_1[i], 11, 32,
39922395
MM
1686 &ac_bias_0[i][0][1], 4, 2,
1687 &ac_bias_0[i][0][0], 4, 2, 0);
1688
1689 /* group 2 AC histograms */
8e6daa4a 1690 init_vlc(&s->ac_vlc_2[i], 11, 32,
39922395
MM
1691 &ac_bias_1[i][0][1], 4, 2,
1692 &ac_bias_1[i][0][0], 4, 2, 0);
1693
1694 /* group 3 AC histograms */
8e6daa4a 1695 init_vlc(&s->ac_vlc_3[i], 11, 32,
39922395
MM
1696 &ac_bias_2[i][0][1], 4, 2,
1697 &ac_bias_2[i][0][0], 4, 2, 0);
1698
1699 /* group 4 AC histograms */
8e6daa4a 1700 init_vlc(&s->ac_vlc_4[i], 11, 32,
39922395
MM
1701 &ac_bias_3[i][0][1], 4, 2,
1702 &ac_bias_3[i][0][0], 4, 2, 0);
1703 }
1704 } else {
39922395 1705
8e6daa4a 1706 for (i = 0; i < 16; i++) {
39922395 1707 /* DC histograms */
8e6daa4a
DC
1708 if (init_vlc(&s->dc_vlc[i], 11, 32,
1709 &s->huffman_table[i][0][1], 8, 4,
1710 &s->huffman_table[i][0][0], 8, 4, 0) < 0)
c4b7b8bf 1711 goto vlc_fail;
39922395
MM
1712
1713 /* group 1 AC histograms */
8e6daa4a
DC
1714 if (init_vlc(&s->ac_vlc_1[i], 11, 32,
1715 &s->huffman_table[i+16][0][1], 8, 4,
1716 &s->huffman_table[i+16][0][0], 8, 4, 0) < 0)
c4b7b8bf 1717 goto vlc_fail;
39922395
MM
1718
1719 /* group 2 AC histograms */
8e6daa4a
DC
1720 if (init_vlc(&s->ac_vlc_2[i], 11, 32,
1721 &s->huffman_table[i+16*2][0][1], 8, 4,
1722 &s->huffman_table[i+16*2][0][0], 8, 4, 0) < 0)
c4b7b8bf 1723 goto vlc_fail;
39922395
MM
1724
1725 /* group 3 AC histograms */
8e6daa4a
DC
1726 if (init_vlc(&s->ac_vlc_3[i], 11, 32,
1727 &s->huffman_table[i+16*3][0][1], 8, 4,
1728 &s->huffman_table[i+16*3][0][0], 8, 4, 0) < 0)
c4b7b8bf 1729 goto vlc_fail;
39922395
MM
1730
1731 /* group 4 AC histograms */
8e6daa4a
DC
1732 if (init_vlc(&s->ac_vlc_4[i], 11, 32,
1733 &s->huffman_table[i+16*4][0][1], 8, 4,
1734 &s->huffman_table[i+16*4][0][0], 8, 4, 0) < 0)
c4b7b8bf 1735 goto vlc_fail;
39922395 1736 }
d86053a4
MM
1737 }
1738
d8278bab
MM
1739 init_vlc(&s->superblock_run_length_vlc, 6, 34,
1740 &superblock_run_length_vlc_table[0][1], 4, 2,
1741 &superblock_run_length_vlc_table[0][0], 4, 2, 0);
1742
dd36b667 1743 init_vlc(&s->fragment_run_length_vlc, 5, 30,
0ad72bdd
MM
1744 &fragment_run_length_vlc_table[0][1], 4, 2,
1745 &fragment_run_length_vlc_table[0][0], 4, 2, 0);
1746
1747 init_vlc(&s->mode_code_vlc, 3, 8,
1748 &mode_code_vlc_table[0][1], 2, 1,
1749 &mode_code_vlc_table[0][0], 2, 1, 0);
1750
1751 init_vlc(&s->motion_vector_vlc, 6, 63,
1752 &motion_vector_vlc_table[0][1], 2, 1,
1753 &motion_vector_vlc_table[0][0], 2, 1, 0);
1754
44ae98dd
MM
1755 for (i = 0; i < 3; i++) {
1756 s->current_frame.data[i] = NULL;
1757 s->last_frame.data[i] = NULL;
1758 s->golden_frame.data[i] = NULL;
61873c4a
MM
1759 }
1760
edbb0c07 1761 return allocate_tables(avctx);
c4b7b8bf
RD
1762
1763vlc_fail:
1764 av_log(avctx, AV_LOG_FATAL, "Invalid huffman table\n");
1765 return -1;
d86053a4
MM
1766}
1767
d23845f3
AS
1768/// Release and shuffle frames after decode finishes
1769static void update_frames(AVCodecContext *avctx)
1770{
1771 Vp3DecodeContext *s = avctx->priv_data;
1772
1773 /* release the last frame, if it is allocated and if it is not the
1774 * golden frame */
1775 if (s->last_frame.data[0] && s->last_frame.type != FF_BUFFER_TYPE_COPY)
1776 ff_thread_release_buffer(avctx, &s->last_frame);
1777
1778 /* shuffle frames (last = current) */
1779 s->last_frame= s->current_frame;
1780
1781 if (s->keyframe) {
1782 if (s->golden_frame.data[0])
1783 ff_thread_release_buffer(avctx, &s->golden_frame);
1784 s->golden_frame = s->current_frame;
1785 s->last_frame.type = FF_BUFFER_TYPE_COPY;
1786 }
1787
1788 s->current_frame.data[0]= NULL; /* ensure that we catch any access to this released frame */
1789}
1790
1791static int vp3_update_thread_context(AVCodecContext *dst, const AVCodecContext *src)
1792{
1793 Vp3DecodeContext *s = dst->priv_data, *s1 = src->priv_data;
1794 int qps_changed = 0, i, err;
1795
8370e426
RB
1796#define copy_fields(to, from, start_field, end_field) memcpy(&to->start_field, &from->start_field, (char*)&to->end_field - (char*)&to->start_field)
1797
d23845f3
AS
1798 if (!s1->current_frame.data[0]
1799 ||s->width != s1->width
8370e426
RB
1800 ||s->height!= s1->height) {
1801 if (s != s1)
1802 copy_fields(s, s1, golden_frame, current_frame);
d23845f3 1803 return -1;
8370e426 1804 }
d23845f3
AS
1805
1806 if (s != s1) {
1807 // init tables if the first frame hasn't been decoded
1808 if (!s->current_frame.data[0]) {
1809 int y_fragment_count, c_fragment_count;
1810 s->avctx = dst;
1811 err = allocate_tables(dst);
1812 if (err)
1813 return err;
1814 y_fragment_count = s->fragment_width[0] * s->fragment_height[0];
1815 c_fragment_count = s->fragment_width[1] * s->fragment_height[1];
1816 memcpy(s->motion_val[0], s1->motion_val[0], y_fragment_count * sizeof(*s->motion_val[0]));
1817 memcpy(s->motion_val[1], s1->motion_val[1], c_fragment_count * sizeof(*s->motion_val[1]));
1818 }
1819
d23845f3
AS
1820 // copy previous frame data
1821 copy_fields(s, s1, golden_frame, dsp);
1822
1823 // copy qscale data if necessary
1824 for (i = 0; i < 3; i++) {
1825 if (s->qps[i] != s1->qps[1]) {
1826 qps_changed = 1;
1827 memcpy(&s->qmat[i], &s1->qmat[i], sizeof(s->qmat[i]));
1828 }
1829 }
1830
902685b8 1831 if (s->qps[0] != s1->qps[0])
d23845f3 1832 memcpy(&s->bounding_values_array, &s1->bounding_values_array, sizeof(s->bounding_values_array));
d23845f3
AS
1833
1834 if (qps_changed)
1835 copy_fields(s, s1, qps, superblock_count);
1836#undef copy_fields
1837 }
1838
1839 update_frames(dst);
1840
1841 return 0;
1842}
1843
115329f1 1844static int vp3_decode_frame(AVCodecContext *avctx,
d86053a4 1845 void *data, int *data_size,
7a00bbad 1846 AVPacket *avpkt)
d86053a4 1847{
7a00bbad
TB
1848 const uint8_t *buf = avpkt->data;
1849 int buf_size = avpkt->size;
d86053a4
MM
1850 Vp3DecodeContext *s = avctx->priv_data;
1851 GetBitContext gb;
dc4b78d9 1852 int i;
d86053a4 1853
d86053a4 1854 init_get_bits(&gb, buf, buf_size * 8);
115329f1 1855
f44ee2c3
AB
1856 if (s->theora && get_bits1(&gb))
1857 {
bb270c08
DB
1858 av_log(avctx, AV_LOG_ERROR, "Header packet passed to frame decoder, skipping\n");
1859 return -1;
f44ee2c3 1860 }
3c3f113e
AB
1861
1862 s->keyframe = !get_bits1(&gb);
1863 if (!s->theora)
bb270c08 1864 skip_bits(&gb, 1);
f2264fa5
DC
1865 for (i = 0; i < 3; i++)
1866 s->last_qps[i] = s->qps[i];
efea8528 1867
f2264fa5 1868 s->nqps=0;
efea8528 1869 do{
f2264fa5
DC
1870 s->qps[s->nqps++]= get_bits(&gb, 6);
1871 } while(s->theora >= 0x030200 && s->nqps<3 && get_bits1(&gb));
1872 for (i = s->nqps; i < 3; i++)
1873 s->qps[i] = -1;
d86053a4 1874
f8830383 1875 if (s->avctx->debug & FF_DEBUG_PICT_INFO)
bb270c08 1876 av_log(s->avctx, AV_LOG_INFO, " VP3 %sframe #%d: Q index = %d\n",
6ee99a7e 1877 s->keyframe?"key":"", avctx->frame_number+1, s->qps[0]);
d86053a4 1878
a4501a45
DC
1879 s->skip_loop_filter = !s->filter_limit_values[s->qps[0]] ||
1880 avctx->skip_loop_filter >= (s->keyframe ? AVDISCARD_ALL : AVDISCARD_NONKEY);
1881
f2264fa5 1882 if (s->qps[0] != s->last_qps[0])
f44b08a5 1883 init_loop_filter(s);
f2264fa5
DC
1884
1885 for (i = 0; i < s->nqps; i++)
1886 // reinit all dequantizers if the first one changed, because
1887 // the DC of the first quantizer must be used for all matrices
1888 if (s->qps[i] != s->last_qps[i] || s->qps[0] != s->last_qps[0])
1889 init_dequantizer(s, i);
642d7e84 1890
068e82ba
DC
1891 if (avctx->skip_frame >= AVDISCARD_NONKEY && !s->keyframe)
1892 return buf_size;
1893
739b5090 1894 s->current_frame.reference = 3;
975a1447 1895 s->current_frame.pict_type = s->keyframe ? AV_PICTURE_TYPE_I : AV_PICTURE_TYPE_P;
d23845f3 1896 if (ff_thread_get_buffer(avctx, &s->current_frame) < 0) {
739b5090 1897 av_log(s->avctx, AV_LOG_ERROR, "get_buffer() failed\n");
e72d2d12 1898 goto error;
739b5090
DC
1899 }
1900
902685b8
JGG
1901 if (!s->edge_emu_buffer)
1902 s->edge_emu_buffer = av_malloc(9*FFABS(s->current_frame.linesize[0]));
1903
d86053a4 1904 if (s->keyframe) {
bb270c08
DB
1905 if (!s->theora)
1906 {
1907 skip_bits(&gb, 4); /* width code */
1908 skip_bits(&gb, 4); /* height code */
1909 if (s->version)
1910 {
1911 s->version = get_bits(&gb, 5);
6ee99a7e 1912 if (avctx->frame_number == 0)
bb270c08
DB
1913 av_log(s->avctx, AV_LOG_DEBUG, "VP version: %d\n", s->version);
1914 }
1915 }
1916 if (s->version || s->theora)
1917 {
1918 if (get_bits1(&gb))
1919 av_log(s->avctx, AV_LOG_ERROR, "Warning, unsupported keyframe coding type?!\n");
1920 skip_bits(&gb, 2); /* reserved? */
1921 }
d86053a4 1922 } else {
735acf56 1923 if (!s->golden_frame.data[0]) {
7a4e8b59 1924 av_log(s->avctx, AV_LOG_WARNING, "vp3: first frame not a keyframe\n");
ff65969f 1925
7a4e8b59 1926 s->golden_frame.reference = 3;
975a1447 1927 s->golden_frame.pict_type = AV_PICTURE_TYPE_I;
d23845f3 1928 if (ff_thread_get_buffer(avctx, &s->golden_frame) < 0) {
7a4e8b59
DC
1929 av_log(s->avctx, AV_LOG_ERROR, "get_buffer() failed\n");
1930 goto error;
1931 }
1932 s->last_frame = s->golden_frame;
1933 s->last_frame.type = FF_BUFFER_TYPE_COPY;
8cf9a09d 1934 ff_thread_report_progress(&s->last_frame, INT_MAX, 0);
d86053a4 1935 }
d86053a4
MM
1936 }
1937
703acd54 1938 memset(s->all_fragments, 0, s->fragment_count * sizeof(Vp3Fragment));
d23845f3 1939 ff_thread_finish_setup(avctx);
d86053a4 1940
220a6f40
MN
1941 if (unpack_superblocks(s, &gb)){
1942 av_log(s->avctx, AV_LOG_ERROR, "error in unpack_superblocks\n");
e72d2d12 1943 goto error;
220a6f40 1944 }
220a6f40
MN
1945 if (unpack_modes(s, &gb)){
1946 av_log(s->avctx, AV_LOG_ERROR, "error in unpack_modes\n");
e72d2d12 1947 goto error;
220a6f40 1948 }
220a6f40
MN
1949 if (unpack_vectors(s, &gb)){
1950 av_log(s->avctx, AV_LOG_ERROR, "error in unpack_vectors\n");
e72d2d12 1951 goto error;
220a6f40 1952 }
f2264fa5
DC
1953 if (unpack_block_qpis(s, &gb)){
1954 av_log(s->avctx, AV_LOG_ERROR, "error in unpack_block_qpis\n");
e72d2d12 1955 goto error;
f2264fa5 1956 }
220a6f40
MN
1957 if (unpack_dct_coeffs(s, &gb)){
1958 av_log(s->avctx, AV_LOG_ERROR, "error in unpack_dct_coeffs\n");
e72d2d12 1959 goto error;
892fc83e 1960 }
735acf56
DC
1961
1962 for (i = 0; i < 3; i++) {
1e76a1da 1963 int height = s->height >> (i && s->chroma_y_shift);
735acf56
DC
1964 if (s->flipped_image)
1965 s->data_offset[i] = 0;
1966 else
1e76a1da 1967 s->data_offset[i] = (height-1) * s->current_frame.linesize[i];
735acf56 1968 }
d86053a4 1969
a8de3901 1970 s->last_slice_end = 0;
7a095ea6 1971 for (i = 0; i < s->c_superblock_height; i++)
dc4b78d9 1972 render_slice(s, i);
d86053a4 1973
256c0662
DC
1974 // filter the last row
1975 for (i = 0; i < 3; i++) {
1e76a1da 1976 int row = (s->height >> (3+(i && s->chroma_y_shift))) - 1;
256c0662
DC
1977 apply_loop_filter(s, i, row, row+1);
1978 }
83f72f13 1979 vp3_draw_horiz_band(s, s->avctx->height);
892fc83e 1980
d86053a4
MM
1981 *data_size=sizeof(AVFrame);
1982 *(AVFrame*)data= s->current_frame;
1983
27237d52 1984 if (!HAVE_THREADS || !(s->avctx->active_thread_type&FF_THREAD_FRAME))
d23845f3 1985 update_frames(avctx);
d86053a4
MM
1986
1987 return buf_size;
e72d2d12
DC
1988
1989error:
d23845f3
AS
1990 ff_thread_report_progress(&s->current_frame, INT_MAX, 0);
1991
27237d52 1992 if (!HAVE_THREADS || !(s->avctx->active_thread_type&FF_THREAD_FRAME))
e72d2d12 1993 avctx->release_buffer(avctx, &s->current_frame);
d23845f3 1994
e72d2d12 1995 return -1;
d86053a4
MM
1996}
1997
98a6fff9 1998static av_cold int vp3_decode_end(AVCodecContext *avctx)
d86053a4
MM
1999{
2000 Vp3DecodeContext *s = avctx->priv_data;
6f4e2b5a 2001 int i;
d86053a4 2002
6f4e2b5a 2003 av_free(s->superblock_coding);
d86053a4 2004 av_free(s->all_fragments);
c72625f2
DC
2005 av_free(s->coded_fragment_list[0]);
2006 av_free(s->dct_tokens_base);
d86053a4 2007 av_free(s->superblock_fragments);
96a7e73b 2008 av_free(s->macroblock_coding);
14268254
DC
2009 av_free(s->motion_val[0]);
2010 av_free(s->motion_val[1]);
902685b8 2011 av_free(s->edge_emu_buffer);
115329f1 2012
f3a29b75
JR
2013 if (avctx->internal->is_copy)
2014 return 0;
d23845f3 2015
6f4e2b5a
MR
2016 for (i = 0; i < 16; i++) {
2017 free_vlc(&s->dc_vlc[i]);
2018 free_vlc(&s->ac_vlc_1[i]);
2019 free_vlc(&s->ac_vlc_2[i]);
2020 free_vlc(&s->ac_vlc_3[i]);
2021 free_vlc(&s->ac_vlc_4[i]);
2022 }
2023
2024 free_vlc(&s->superblock_run_length_vlc);
2025 free_vlc(&s->fragment_run_length_vlc);
2026 free_vlc(&s->mode_code_vlc);
2027 free_vlc(&s->motion_vector_vlc);
2028
d86053a4 2029 /* release all frames */
8370e426 2030 vp3_decode_flush(avctx);
d86053a4
MM
2031
2032 return 0;
2033}
2034
39922395
MM
2035static int read_huffman_tree(AVCodecContext *avctx, GetBitContext *gb)
2036{
2037 Vp3DecodeContext *s = avctx->priv_data;
2038
5fc32c27 2039 if (get_bits1(gb)) {
39922395
MM
2040 int token;
2041 if (s->entries >= 32) { /* overflow */
2042 av_log(avctx, AV_LOG_ERROR, "huffman tree overflow\n");
2043 return -1;
2044 }
2045 token = get_bits(gb, 5);
2046 //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);
2047 s->huffman_table[s->hti][token][0] = s->hbits;
2048 s->huffman_table[s->hti][token][1] = s->huff_code_size;
2049 s->entries++;
2050 }
2051 else {
2052 if (s->huff_code_size >= 32) {/* overflow */
2053 av_log(avctx, AV_LOG_ERROR, "huffman tree overflow\n");
2054 return -1;
2055 }
2056 s->huff_code_size++;
2057 s->hbits <<= 1;
00bbe276
AC
2058 if (read_huffman_tree(avctx, gb))
2059 return -1;
39922395 2060 s->hbits |= 1;
00bbe276
AC
2061 if (read_huffman_tree(avctx, gb))
2062 return -1;
39922395
MM
2063 s->hbits >>= 1;
2064 s->huff_code_size--;
2065 }
2066 return 0;
2067}
2068
b250f9c6 2069#if CONFIG_THEORA_DECODER
1e76a1da
DC
2070static const enum PixelFormat theora_pix_fmts[4] = {
2071 PIX_FMT_YUV420P, PIX_FMT_NONE, PIX_FMT_YUV422P, PIX_FMT_YUV444P
2072};
2073
e278056f 2074static int theora_decode_header(AVCodecContext *avctx, GetBitContext *gb)
f44ee2c3
AB
2075{
2076 Vp3DecodeContext *s = avctx->priv_data;
ea3c2d53 2077 int visible_width, visible_height, colorspace;
ddc7e438 2078 int offset_x = 0, offset_y = 0;
6974952d 2079 AVRational fps, aspect;
9a7ad925 2080
e278056f 2081 s->theora = get_bits_long(gb, 24);
356306ac 2082 av_log(avctx, AV_LOG_DEBUG, "Theora bitstream version %X\n", s->theora);
105c3d25 2083
ba7ee4a4 2084 /* 3.2.0 aka alpha3 has the same frame orientation as original vp3 */
9a7ad925 2085 /* but previous versions have the image flipped relative to vp3 */
ba7ee4a4 2086 if (s->theora < 0x030200)
9a7ad925 2087 {
bb270c08 2088 s->flipped_image = 1;
9a7ad925
AB
2089 av_log(avctx, AV_LOG_DEBUG, "Old (<alpha3) Theora bitstream, flipped image\n");
2090 }
f44ee2c3 2091
277e3e53
DC
2092 visible_width = s->width = get_bits(gb, 16) << 4;
2093 visible_height = s->height = get_bits(gb, 16) << 4;
115329f1 2094
e16f217c 2095 if(av_image_check_size(s->width, s->height, 0, avctx)){
7146d2c2 2096 av_log(avctx, AV_LOG_ERROR, "Invalid dimensions (%dx%d)\n", s->width, s->height);
0ecca7a4
MN
2097 s->width= s->height= 0;
2098 return -1;
2099 }
7146d2c2 2100
277e3e53 2101 if (s->theora >= 0x030200) {
a0ce2d1b
DC
2102 visible_width = get_bits_long(gb, 24);
2103 visible_height = get_bits_long(gb, 24);
c0f716b8 2104
ddc7e438
DC
2105 offset_x = get_bits(gb, 8); /* offset x */
2106 offset_y = get_bits(gb, 8); /* offset y, from bottom */
ba4816a0 2107 }
f44ee2c3 2108
8099d6c9
DC
2109 fps.num = get_bits_long(gb, 32);
2110 fps.den = get_bits_long(gb, 32);
2111 if (fps.num && fps.den) {
33e62383
DC
2112 av_reduce(&avctx->time_base.num, &avctx->time_base.den,
2113 fps.den, fps.num, 1<<30);
8099d6c9
DC
2114 }
2115
6974952d
RD
2116 aspect.num = get_bits_long(gb, 24);
2117 aspect.den = get_bits_long(gb, 24);
2118 if (aspect.num && aspect.den) {
2119 av_reduce(&avctx->sample_aspect_ratio.num,
2120 &avctx->sample_aspect_ratio.den,
2121 aspect.num, aspect.den, 1<<30);
2122 }
115329f1 2123
ba7ee4a4 2124 if (s->theora < 0x030200)
e278056f 2125 skip_bits(gb, 5); /* keyframe frequency force */
ea3c2d53 2126 colorspace = get_bits(gb, 8);
e278056f 2127 skip_bits(gb, 24); /* bitrate */
f44ee2c3 2128
e278056f 2129 skip_bits(gb, 6); /* quality hint */
115329f1 2130
ba7ee4a4 2131 if (s->theora >= 0x030200)
105c3d25 2132 {
e278056f 2133 skip_bits(gb, 5); /* keyframe frequency force */
1e76a1da 2134 avctx->pix_fmt = theora_pix_fmts[get_bits(gb, 2)];
337f5c6e 2135 skip_bits(gb, 3); /* reserved */
105c3d25 2136 }
115329f1 2137
e278056f 2138// align_get_bits(gb);
115329f1 2139
c0f716b8 2140 if ( visible_width <= s->width && visible_width > s->width-16
ddc7e438
DC
2141 && visible_height <= s->height && visible_height > s->height-16
2142 && !offset_x && (offset_y == s->height - visible_height))
c0f716b8
AJ
2143 avcodec_set_dimensions(avctx, visible_width, visible_height);
2144 else
2145 avcodec_set_dimensions(avctx, s->width, s->height);
f44ee2c3 2146
ea3c2d53
DC
2147 if (colorspace == 1) {
2148 avctx->color_primaries = AVCOL_PRI_BT470M;
2149 } else if (colorspace == 2) {
2150 avctx->color_primaries = AVCOL_PRI_BT470BG;
2151 }
2152 if (colorspace == 1 || colorspace == 2) {
2153 avctx->colorspace = AVCOL_SPC_BT470BG;
2154 avctx->color_trc = AVCOL_TRC_BT709;
2155 }
2156
f44ee2c3
AB
2157 return 0;
2158}
2159
e278056f 2160static int theora_decode_tables(AVCodecContext *avctx, GetBitContext *gb)
f44ee2c3
AB
2161{
2162 Vp3DecodeContext *s = avctx->priv_data;
ae1dd8e1 2163 int i, n, matrices, inter, plane;
ba7ee4a4
MC
2164
2165 if (s->theora >= 0x030200) {
e278056f 2166 n = get_bits(gb, 3);
9c7154c7 2167 /* loop filter limit values table */
9d777508
JGG
2168 if (n)
2169 for (i = 0; i < 64; i++)
10f69158 2170 s->filter_limit_values[i] = get_bits(gb, n);
ba7ee4a4 2171 }
115329f1 2172
ba7ee4a4 2173 if (s->theora >= 0x030200)
e278056f 2174 n = get_bits(gb, 4) + 1;
ba7ee4a4
MC
2175 else
2176 n = 16;
f44ee2c3
AB
2177 /* quality threshold table */
2178 for (i = 0; i < 64; i++)
e278056f 2179 s->coded_ac_scale_factor[i] = get_bits(gb, n);
f44ee2c3 2180
ba7ee4a4 2181 if (s->theora >= 0x030200)
e278056f 2182 n = get_bits(gb, 4) + 1;
ba7ee4a4
MC
2183 else
2184 n = 16;
f44ee2c3
AB
2185 /* dc scale factor table */
2186 for (i = 0; i < 64; i++)
e278056f 2187 s->coded_dc_scale_factor[i] = get_bits(gb, n);
f44ee2c3 2188
ba7ee4a4 2189 if (s->theora >= 0x030200)
e278056f 2190 matrices = get_bits(gb, 9) + 1;
ba7ee4a4 2191 else
2da2ba03 2192 matrices = 3;
f44ee2c3 2193
ae1dd8e1
MN
2194 if(matrices > 384){
2195 av_log(avctx, AV_LOG_ERROR, "invalid number of base matrixes\n");
2196 return -1;
2197 }
3c3f113e 2198
ae1dd8e1 2199 for(n=0; n<matrices; n++){
bb270c08 2200 for (i = 0; i < 64; i++)
ae1dd8e1
MN
2201 s->base_matrix[n][i]= get_bits(gb, 8);
2202 }
2da2ba03 2203
ae1dd8e1
MN
2204 for (inter = 0; inter <= 1; inter++) {
2205 for (plane = 0; plane <= 2; plane++) {
2206 int newqr= 1;
2207 if (inter || plane > 0)
5fc32c27 2208 newqr = get_bits1(gb);
39922395 2209 if (!newqr) {
ae1dd8e1 2210 int qtj, plj;
5fc32c27 2211 if(inter && get_bits1(gb)){
ae1dd8e1
MN
2212 qtj = 0;
2213 plj = plane;
2214 }else{
2215 qtj= (3*inter + plane - 1) / 3;
2216 plj= (plane + 2) % 3;
2217 }
2218 s->qr_count[inter][plane]= s->qr_count[qtj][plj];
2219 memcpy(s->qr_size[inter][plane], s->qr_size[qtj][plj], sizeof(s->qr_size[0][0]));
2220 memcpy(s->qr_base[inter][plane], s->qr_base[qtj][plj], sizeof(s->qr_base[0][0]));
2221 } else {
2222 int qri= 0;
39922395 2223 int qi = 0;
ae1dd8e1
MN
2224
2225 for(;;){
2226 i= get_bits(gb, av_log2(matrices-1)+1);
2227 if(i>= matrices){
2228 av_log(avctx, AV_LOG_ERROR, "invalid base matrix index\n");
2229 return -1;
2230 }
2231 s->qr_base[inter][plane][qri]= i;
2232 if(qi >= 63)
2233 break;
2234 i = get_bits(gb, av_log2(63-qi)+1) + 1;
2235 s->qr_size[inter][plane][qri++]= i;
2236 qi += i;
39922395 2237 }
ae1dd8e1 2238
2da2ba03 2239 if (qi > 63) {
7146d2c2 2240 av_log(avctx, AV_LOG_ERROR, "invalid qi %d > 63\n", qi);
bb270c08
DB
2241 return -1;
2242 }
ae1dd8e1 2243 s->qr_count[inter][plane]= qri;
39922395
MM
2244 }
2245 }
2246 }
2247
2da2ba03 2248 /* Huffman tables */
39922395
MM
2249 for (s->hti = 0; s->hti < 80; s->hti++) {
2250 s->entries = 0;
2251 s->huff_code_size = 1;
5fc32c27 2252 if (!get_bits1(gb)) {
39922395 2253 s->hbits = 0;
00bbe276
AC
2254 if(read_huffman_tree(avctx, gb))
2255 return -1;
39922395 2256 s->hbits = 1;
00bbe276
AC
2257 if(read_huffman_tree(avctx, gb))
2258 return -1;
39922395
MM
2259 }
2260 }
115329f1 2261
f44ee2c3 2262 s->theora_tables = 1;
115329f1 2263
f44ee2c3
AB
2264 return 0;
2265}
2266
5ef251e5 2267static av_cold int theora_decode_init(AVCodecContext *avctx)
f44ee2c3
AB
2268{
2269 Vp3DecodeContext *s = avctx->priv_data;
2270 GetBitContext gb;
2271 int ptype;
da91ed59
AJ
2272 uint8_t *header_start[3];
2273 int header_len[3];
2274 int i;
115329f1 2275
f44ee2c3
AB
2276 s->theora = 1;
2277
2278 if (!avctx->extradata_size)
7146d2c2
AB
2279 {
2280 av_log(avctx, AV_LOG_ERROR, "Missing extradata!\n");
bb270c08 2281 return -1;
7146d2c2 2282 }
f44ee2c3 2283
357db4c2 2284 if (avpriv_split_xiph_headers(avctx->extradata, avctx->extradata_size,
da91ed59
AJ
2285 42, header_start, header_len) < 0) {
2286 av_log(avctx, AV_LOG_ERROR, "Corrupt extradata\n");
2287 return -1;
2288 }
ee89b2b9 2289
da91ed59 2290 for(i=0;i<3;i++) {
fa6f2751 2291 init_get_bits(&gb, header_start[i], header_len[i] * 8);
f44ee2c3
AB
2292
2293 ptype = get_bits(&gb, 8);
115329f1 2294
7146d2c2
AB
2295 if (!(ptype & 0x80))
2296 {
2297 av_log(avctx, AV_LOG_ERROR, "Invalid extradata!\n");
e278056f 2298// return -1;
115329f1 2299 }
7146d2c2 2300
3700dab4 2301 // FIXME: Check for this as well.
0a8dedc9 2302 skip_bits_long(&gb, 6*8); /* "theora" */
115329f1 2303
f44ee2c3
AB
2304 switch(ptype)
2305 {
2306 case 0x80:
e278056f 2307 theora_decode_header(avctx, &gb);
bb270c08
DB
2308 break;
2309 case 0x81:
2da2ba03 2310// FIXME: is this needed? it breaks sometimes
bb270c08
DB
2311// theora_decode_comments(avctx, gb);
2312 break;
2313 case 0x82:
00bbe276
AC
2314 if (theora_decode_tables(avctx, &gb))
2315 return -1;
bb270c08
DB
2316 break;
2317 default:
2318 av_log(avctx, AV_LOG_ERROR, "Unknown Theora config packet: %d\n", ptype&~0x80);
2319 break;
f44ee2c3 2320 }
12ce1f3f
DC
2321 if(ptype != 0x81 && 8*header_len[i] != get_bits_count(&gb))
2322 av_log(avctx, AV_LOG_WARNING, "%d bits left in packet %X\n", 8*header_len[i] - get_bits_count(&gb), ptype);
116d866c
MC
2323 if (s->theora < 0x030200)
2324 break;
ee89b2b9 2325 }
f44ee2c3 2326
c79c960a 2327 return vp3_decode_init(avctx);
f44ee2c3
AB
2328}
2329
8dcf5184
RB
2330static void vp3_decode_flush(AVCodecContext *avctx)
2331{
2332 Vp3DecodeContext *s = avctx->priv_data;
2333
2334 if (s->golden_frame.data[0]) {
2335 if (s->golden_frame.data[0] == s->last_frame.data[0])
2336 memset(&s->last_frame, 0, sizeof(AVFrame));
2337 if (s->current_frame.data[0] == s->golden_frame.data[0])
2338 memset(&s->current_frame, 0, sizeof(AVFrame));
2339 ff_thread_release_buffer(avctx, &s->golden_frame);
2340 }
2341 if (s->last_frame.data[0]) {
2342 if (s->current_frame.data[0] == s->last_frame.data[0])
2343 memset(&s->current_frame, 0, sizeof(AVFrame));
2344 ff_thread_release_buffer(avctx, &s->last_frame);
2345 }
2346 if (s->current_frame.data[0])
2347 ff_thread_release_buffer(avctx, &s->current_frame);
2348}
2349
8370e426
RB
2350static int vp3_init_thread_copy(AVCodecContext *avctx)
2351{
2352 Vp3DecodeContext *s = avctx->priv_data;
2353
2354 s->superblock_coding = NULL;
2355 s->all_fragments = NULL;
2356 s->coded_fragment_list[0] = NULL;
2357 s->dct_tokens_base = NULL;
2358 s->superblock_fragments = NULL;
2359 s->macroblock_coding = NULL;
2360 s->motion_val[0] = NULL;
2361 s->motion_val[1] = NULL;
2362 s->edge_emu_buffer = NULL;
2363
2364 return 0;
2365}
2366
d36beb3f 2367AVCodec ff_theora_decoder = {
ec6402b7
AK
2368 .name = "theora",
2369 .type = AVMEDIA_TYPE_VIDEO,
2370 .id = CODEC_ID_THEORA,
2371 .priv_data_size = sizeof(Vp3DecodeContext),
2372 .init = theora_decode_init,
2373 .close = vp3_decode_end,
2374 .decode = vp3_decode_frame,
2375 .capabilities = CODEC_CAP_DR1 | CODEC_CAP_DRAW_HORIZ_BAND | CODEC_CAP_FRAME_THREADS,
8dcf5184 2376 .flush = vp3_decode_flush,
fe4bf374 2377 .long_name = NULL_IF_CONFIG_SMALL("Theora"),
8370e426 2378 .init_thread_copy = ONLY_IF_THREADS_ENABLED(vp3_init_thread_copy),
d23845f3 2379 .update_thread_context = ONLY_IF_THREADS_ENABLED(vp3_update_thread_context)
d86053a4 2380};
6f6a3e2a 2381#endif
f44ee2c3 2382
d36beb3f 2383AVCodec ff_vp3_decoder = {
ec6402b7
AK
2384 .name = "vp3",
2385 .type = AVMEDIA_TYPE_VIDEO,
2386 .id = CODEC_ID_VP3,
2387 .priv_data_size = sizeof(Vp3DecodeContext),
2388 .init = vp3_decode_init,
2389 .close = vp3_decode_end,
2390 .decode = vp3_decode_frame,
2391 .capabilities = CODEC_CAP_DR1 | CODEC_CAP_DRAW_HORIZ_BAND | CODEC_CAP_FRAME_THREADS,
8dcf5184 2392 .flush = vp3_decode_flush,
fe4bf374 2393 .long_name = NULL_IF_CONFIG_SMALL("On2 VP3"),
8370e426 2394 .init_thread_copy = ONLY_IF_THREADS_ENABLED(vp3_init_thread_copy),
d23845f3 2395 .update_thread_context = ONLY_IF_THREADS_ENABLED(vp3_update_thread_context)
f44ee2c3 2396};