malloc padding to avoid reading past the malloc()ed area.
[libav.git] / libavcodec / vp3.c
CommitLineData
d86053a4 1/*
67335dbc 2 * Copyright (C) 2003-2004 the ffmpeg project
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3 *
4 * This library is free software; you can redistribute it and/or
5 * modify it under the terms of the GNU Lesser General Public
6 * License as published by the Free Software Foundation; either
7 * version 2 of the License, or (at your option) any later version.
8 *
9 * This library is distributed in the hope that it will be useful,
10 * but WITHOUT ANY WARRANTY; without even the implied warranty of
11 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
12 * Lesser General Public License for more details.
13 *
14 * You should have received a copy of the GNU Lesser General Public
15 * License along with this library; if not, write to the Free Software
16 * Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
17 *
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18 */
19
20/**
21 * @file vp3.c
22 * On2 VP3 Video Decoder
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23 *
24 * VP3 Video Decoder by Mike Melanson (mike at multimedia.cx)
25 * For more information about the VP3 coding process, visit:
26 * http://multimedia.cx/
27 *
28 * Theora decoder by Alex Beregszaszi
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29 */
30
31#include <stdio.h>
32#include <stdlib.h>
33#include <string.h>
34#include <unistd.h>
35
36#include "common.h"
37#include "avcodec.h"
38#include "dsputil.h"
39#include "mpegvideo.h"
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40
41#include "vp3data.h"
42
43#define FRAGMENT_PIXELS 8
44
45/*
46 * Debugging Variables
47 *
48 * Define one or more of the following compile-time variables to 1 to obtain
49 * elaborate information about certain aspects of the decoding process.
50 *
96a7e73b 51 * KEYFRAMES_ONLY: set this to 1 to only see keyframes (VP3 slideshow mode)
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52 * DEBUG_VP3: high-level decoding flow
53 * DEBUG_INIT: initialization parameters
54 * DEBUG_DEQUANTIZERS: display how the dequanization tables are built
55 * DEBUG_BLOCK_CODING: unpacking the superblock/macroblock/fragment coding
56 * DEBUG_MODES: unpacking the coding modes for individual fragments
57 * DEBUG_VECTORS: display the motion vectors
58 * DEBUG_TOKEN: display exhaustive information about each DCT token
59 * DEBUG_VLC: display the VLCs as they are extracted from the stream
60 * DEBUG_DC_PRED: display the process of reversing DC prediction
61 * DEBUG_IDCT: show every detail of the IDCT process
62 */
63
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64#define KEYFRAMES_ONLY 0
65
52ceae06 66#define DEBUG_VP3 0
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67#define DEBUG_INIT 0
68#define DEBUG_DEQUANTIZERS 0
69#define DEBUG_BLOCK_CODING 0
70#define DEBUG_MODES 0
71#define DEBUG_VECTORS 0
72#define DEBUG_TOKEN 0
73#define DEBUG_VLC 0
74#define DEBUG_DC_PRED 0
75#define DEBUG_IDCT 0
76
77#if DEBUG_VP3
8868d310 78#define debug_vp3(args...) av_log(NULL, AV_LOG_DEBUG, ## args)
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79#else
80static inline void debug_vp3(const char *format, ...) { }
81#endif
82
83#if DEBUG_INIT
8868d310 84#define debug_init(args...) av_log(NULL, AV_LOG_DEBUG, ## args)
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85#else
86static inline void debug_init(const char *format, ...) { }
87#endif
88
89#if DEBUG_DEQUANTIZERS
8868d310 90#define debug_dequantizers(args...) av_log(NULL, AV_LOG_DEBUG, ## args)
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91#else
92static inline void debug_dequantizers(const char *format, ...) { }
93#endif
94
95#if DEBUG_BLOCK_CODING
8868d310 96#define debug_block_coding(args...) av_log(NULL, AV_LOG_DEBUG, ## args)
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97#else
98static inline void debug_block_coding(const char *format, ...) { }
99#endif
100
101#if DEBUG_MODES
8868d310 102#define debug_modes(args...) av_log(NULL, AV_LOG_DEBUG, ## args)
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103#else
104static inline void debug_modes(const char *format, ...) { }
105#endif
106
107#if DEBUG_VECTORS
8868d310 108#define debug_vectors(args...) av_log(NULL, AV_LOG_DEBUG, ## args)
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109#else
110static inline void debug_vectors(const char *format, ...) { }
111#endif
112
113#if DEBUG_TOKEN
8868d310 114#define debug_token(args...) av_log(NULL, AV_LOG_DEBUG, ## args)
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115#else
116static inline void debug_token(const char *format, ...) { }
117#endif
118
119#if DEBUG_VLC
8868d310 120#define debug_vlc(args...) av_log(NULL, AV_LOG_DEBUG, ## args)
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121#else
122static inline void debug_vlc(const char *format, ...) { }
123#endif
124
125#if DEBUG_DC_PRED
8868d310 126#define debug_dc_pred(args...) av_log(NULL, AV_LOG_DEBUG, ## args)
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127#else
128static inline void debug_dc_pred(const char *format, ...) { }
129#endif
130
131#if DEBUG_IDCT
8868d310 132#define debug_idct(args...) av_log(NULL, AV_LOG_DEBUG, ## args)
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133#else
134static inline void debug_idct(const char *format, ...) { }
135#endif
136
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137typedef struct Coeff {
138 struct Coeff *next;
139 DCTELEM coeff;
140 uint8_t index;
141} Coeff;
142
143//FIXME split things out into their own arrays
d86053a4 144typedef struct Vp3Fragment {
7beddb12 145 Coeff *next_coeff;
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146 /* address of first pixel taking into account which plane the fragment
147 * lives on as well as the plane stride */
148 int first_pixel;
149 /* this is the macroblock that the fragment belongs to */
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150 uint16_t macroblock;
151 uint8_t coding_method;
152 uint8_t coeff_count;
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153 int8_t motion_x;
154 int8_t motion_y;
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155} Vp3Fragment;
156
157#define SB_NOT_CODED 0
158#define SB_PARTIALLY_CODED 1
159#define SB_FULLY_CODED 2
160
161#define MODE_INTER_NO_MV 0
162#define MODE_INTRA 1
163#define MODE_INTER_PLUS_MV 2
164#define MODE_INTER_LAST_MV 3
165#define MODE_INTER_PRIOR_LAST 4
166#define MODE_USING_GOLDEN 5
167#define MODE_GOLDEN_MV 6
168#define MODE_INTER_FOURMV 7
169#define CODING_MODE_COUNT 8
170
171/* special internal mode */
172#define MODE_COPY 8
173
174/* There are 6 preset schemes, plus a free-form scheme */
175static int ModeAlphabet[7][CODING_MODE_COUNT] =
176{
177 /* this is the custom scheme */
178 { 0, 0, 0, 0, 0, 0, 0, 0 },
179
180 /* scheme 1: Last motion vector dominates */
181 { MODE_INTER_LAST_MV, MODE_INTER_PRIOR_LAST,
182 MODE_INTER_PLUS_MV, MODE_INTER_NO_MV,
183 MODE_INTRA, MODE_USING_GOLDEN,
184 MODE_GOLDEN_MV, MODE_INTER_FOURMV },
185
186 /* scheme 2 */
187 { MODE_INTER_LAST_MV, MODE_INTER_PRIOR_LAST,
188 MODE_INTER_NO_MV, MODE_INTER_PLUS_MV,
189 MODE_INTRA, MODE_USING_GOLDEN,
190 MODE_GOLDEN_MV, MODE_INTER_FOURMV },
191
192 /* scheme 3 */
193 { MODE_INTER_LAST_MV, MODE_INTER_PLUS_MV,
194 MODE_INTER_PRIOR_LAST, MODE_INTER_NO_MV,
195 MODE_INTRA, MODE_USING_GOLDEN,
196 MODE_GOLDEN_MV, MODE_INTER_FOURMV },
197
198 /* scheme 4 */
199 { MODE_INTER_LAST_MV, MODE_INTER_PLUS_MV,
200 MODE_INTER_NO_MV, MODE_INTER_PRIOR_LAST,
201 MODE_INTRA, MODE_USING_GOLDEN,
202 MODE_GOLDEN_MV, MODE_INTER_FOURMV },
203
204 /* scheme 5: No motion vector dominates */
205 { MODE_INTER_NO_MV, MODE_INTER_LAST_MV,
206 MODE_INTER_PRIOR_LAST, MODE_INTER_PLUS_MV,
207 MODE_INTRA, MODE_USING_GOLDEN,
208 MODE_GOLDEN_MV, MODE_INTER_FOURMV },
209
210 /* scheme 6 */
211 { MODE_INTER_NO_MV, MODE_USING_GOLDEN,
212 MODE_INTER_LAST_MV, MODE_INTER_PRIOR_LAST,
213 MODE_INTER_PLUS_MV, MODE_INTRA,
214 MODE_GOLDEN_MV, MODE_INTER_FOURMV },
215
216};
217
218#define MIN_DEQUANT_VAL 2
219
220typedef struct Vp3DecodeContext {
221 AVCodecContext *avctx;
f44ee2c3 222 int theora, theora_tables;
3c3f113e 223 int version;
d86053a4 224 int width, height;
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225 AVFrame golden_frame;
226 AVFrame last_frame;
227 AVFrame current_frame;
228 int keyframe;
229 DSPContext dsp;
9a7ad925 230 int flipped_image;
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231
232 int quality_index;
233 int last_quality_index;
234
235 int superblock_count;
236 int superblock_width;
237 int superblock_height;
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238 int y_superblock_width;
239 int y_superblock_height;
240 int c_superblock_width;
241 int c_superblock_height;
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242 int u_superblock_start;
243 int v_superblock_start;
244 unsigned char *superblock_coding;
245
246 int macroblock_count;
247 int macroblock_width;
248 int macroblock_height;
249
250 int fragment_count;
251 int fragment_width;
252 int fragment_height;
253
254 Vp3Fragment *all_fragments;
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255 Coeff *coeffs;
256 Coeff *next_coeff;
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257 int u_fragment_start;
258 int v_fragment_start;
f44ee2c3 259
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260 ScanTable scantable;
261
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262 /* tables */
263 uint16_t coded_dc_scale_factor[64];
67335dbc 264 uint32_t coded_ac_scale_factor[64];
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265 uint16_t coded_intra_y_dequant[64];
266 uint16_t coded_intra_c_dequant[64];
267 uint16_t coded_inter_dequant[64];
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268
269 /* this is a list of indices into the all_fragments array indicating
270 * which of the fragments are coded */
271 int *coded_fragment_list;
272 int coded_fragment_list_index;
273 int pixel_addresses_inited;
274
275 VLC dc_vlc[16];
276 VLC ac_vlc_1[16];
277 VLC ac_vlc_2[16];
278 VLC ac_vlc_3[16];
279 VLC ac_vlc_4[16];
280
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281 VLC superblock_run_length_vlc;
282 VLC fragment_run_length_vlc;
283 VLC mode_code_vlc;
284 VLC motion_vector_vlc;
285
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286 /* these arrays need to be on 16-byte boundaries since SSE2 operations
287 * index into them */
288 int16_t __align16 intra_y_dequant[64];
289 int16_t __align16 intra_c_dequant[64];
290 int16_t __align16 inter_dequant[64];
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291
292 /* This table contains superblock_count * 16 entries. Each set of 16
293 * numbers corresponds to the fragment indices 0..15 of the superblock.
294 * An entry will be -1 to indicate that no entry corresponds to that
295 * index. */
296 int *superblock_fragments;
297
298 /* This table contains superblock_count * 4 entries. Each set of 4
299 * numbers corresponds to the macroblock indices 0..3 of the superblock.
300 * An entry will be -1 to indicate that no entry corresponds to that
301 * index. */
302 int *superblock_macroblocks;
303
304 /* This table contains macroblock_count * 6 entries. Each set of 6
305 * numbers corresponds to the fragment indices 0..5 which comprise
306 * the macroblock (4 Y fragments and 2 C fragments). */
307 int *macroblock_fragments;
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308 /* This is an array that indicates how a particular macroblock
309 * is coded. */
96a7e73b 310 unsigned char *macroblock_coding;
d86053a4 311
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312 int first_coded_y_fragment;
313 int first_coded_c_fragment;
314 int last_coded_y_fragment;
315 int last_coded_c_fragment;
316
a2f11b3c 317 uint8_t edge_emu_buffer[9*2048]; //FIXME dynamic alloc
b928ec64 318 uint8_t qscale_table[2048]; //FIXME dynamic alloc (width+15)/16
39922395 319
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320 /* Huffman decode */
321 int hti;
322 unsigned int hbits;
323 int entries;
324 int huff_code_size;
325 uint16_t huffman_table[80][32][2];
326
327 uint32_t filter_limit_values[64];
328 int bounding_values_array[256];
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329} Vp3DecodeContext;
330
3c3f113e
AB
331static int theora_decode_comments(AVCodecContext *avctx, GetBitContext gb);
332static int theora_decode_tables(AVCodecContext *avctx, GetBitContext gb);
333
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334/************************************************************************
335 * VP3 specific functions
336 ************************************************************************/
337
338/*
339 * This function sets up all of the various blocks mappings:
340 * superblocks <-> fragments, macroblocks <-> fragments,
341 * superblocks <-> macroblocks
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342 *
343 * Returns 0 is successful; returns 1 if *anything* went wrong.
d86053a4 344 */
892fc83e 345static int init_block_mapping(Vp3DecodeContext *s)
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346{
347 int i, j;
348 signed int hilbert_walk_y[16];
349 signed int hilbert_walk_c[16];
350 signed int hilbert_walk_mb[4];
351
352 int current_fragment = 0;
353 int current_width = 0;
354 int current_height = 0;
355 int right_edge = 0;
356 int bottom_edge = 0;
357 int superblock_row_inc = 0;
358 int *hilbert = NULL;
359 int mapping_index = 0;
360
361 int current_macroblock;
362 int c_fragment;
363
364 signed char travel_width[16] = {
365 1, 1, 0, -1,
366 0, 0, 1, 0,
367 1, 0, 1, 0,
368 0, -1, 0, 1
369 };
370
371 signed char travel_height[16] = {
372 0, 0, 1, 0,
373 1, 1, 0, -1,
374 0, 1, 0, -1,
375 -1, 0, -1, 0
376 };
377
378 signed char travel_width_mb[4] = {
379 1, 0, 1, 0
380 };
381
382 signed char travel_height_mb[4] = {
383 0, 1, 0, -1
384 };
385
386 debug_vp3(" vp3: initialize block mapping tables\n");
387
388 /* figure out hilbert pattern per these frame dimensions */
389 hilbert_walk_y[0] = 1;
390 hilbert_walk_y[1] = 1;
391 hilbert_walk_y[2] = s->fragment_width;
392 hilbert_walk_y[3] = -1;
393 hilbert_walk_y[4] = s->fragment_width;
394 hilbert_walk_y[5] = s->fragment_width;
395 hilbert_walk_y[6] = 1;
396 hilbert_walk_y[7] = -s->fragment_width;
397 hilbert_walk_y[8] = 1;
398 hilbert_walk_y[9] = s->fragment_width;
399 hilbert_walk_y[10] = 1;
400 hilbert_walk_y[11] = -s->fragment_width;
401 hilbert_walk_y[12] = -s->fragment_width;
402 hilbert_walk_y[13] = -1;
403 hilbert_walk_y[14] = -s->fragment_width;
404 hilbert_walk_y[15] = 1;
405
406 hilbert_walk_c[0] = 1;
407 hilbert_walk_c[1] = 1;
408 hilbert_walk_c[2] = s->fragment_width / 2;
409 hilbert_walk_c[3] = -1;
410 hilbert_walk_c[4] = s->fragment_width / 2;
411 hilbert_walk_c[5] = s->fragment_width / 2;
412 hilbert_walk_c[6] = 1;
413 hilbert_walk_c[7] = -s->fragment_width / 2;
414 hilbert_walk_c[8] = 1;
415 hilbert_walk_c[9] = s->fragment_width / 2;
416 hilbert_walk_c[10] = 1;
417 hilbert_walk_c[11] = -s->fragment_width / 2;
418 hilbert_walk_c[12] = -s->fragment_width / 2;
419 hilbert_walk_c[13] = -1;
420 hilbert_walk_c[14] = -s->fragment_width / 2;
421 hilbert_walk_c[15] = 1;
422
423 hilbert_walk_mb[0] = 1;
424 hilbert_walk_mb[1] = s->macroblock_width;
425 hilbert_walk_mb[2] = 1;
426 hilbert_walk_mb[3] = -s->macroblock_width;
427
428 /* iterate through each superblock (all planes) and map the fragments */
429 for (i = 0; i < s->superblock_count; i++) {
430 debug_init(" superblock %d (u starts @ %d, v starts @ %d)\n",
431 i, s->u_superblock_start, s->v_superblock_start);
432
433 /* time to re-assign the limits? */
434 if (i == 0) {
435
436 /* start of Y superblocks */
437 right_edge = s->fragment_width;
438 bottom_edge = s->fragment_height;
892fc83e 439 current_width = -1;
d86053a4 440 current_height = 0;
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441 superblock_row_inc = 3 * s->fragment_width -
442 (s->y_superblock_width * 4 - s->fragment_width);
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443 hilbert = hilbert_walk_y;
444
445 /* the first operation for this variable is to advance by 1 */
446 current_fragment = -1;
447
448 } else if (i == s->u_superblock_start) {
449
450 /* start of U superblocks */
451 right_edge = s->fragment_width / 2;
452 bottom_edge = s->fragment_height / 2;
892fc83e 453 current_width = -1;
d86053a4 454 current_height = 0;
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455 superblock_row_inc = 3 * (s->fragment_width / 2) -
456 (s->c_superblock_width * 4 - s->fragment_width / 2);
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457 hilbert = hilbert_walk_c;
458
459 /* the first operation for this variable is to advance by 1 */
460 current_fragment = s->u_fragment_start - 1;
461
462 } else if (i == s->v_superblock_start) {
463
464 /* start of V superblocks */
465 right_edge = s->fragment_width / 2;
466 bottom_edge = s->fragment_height / 2;
892fc83e 467 current_width = -1;
d86053a4 468 current_height = 0;
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469 superblock_row_inc = 3 * (s->fragment_width / 2) -
470 (s->c_superblock_width * 4 - s->fragment_width / 2);
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471 hilbert = hilbert_walk_c;
472
473 /* the first operation for this variable is to advance by 1 */
474 current_fragment = s->v_fragment_start - 1;
475
476 }
477
892fc83e 478 if (current_width >= right_edge - 1) {
d86053a4 479 /* reset width and move to next superblock row */
892fc83e 480 current_width = -1;
d86053a4
MM
481 current_height += 4;
482
483 /* fragment is now at the start of a new superblock row */
484 current_fragment += superblock_row_inc;
485 }
486
487 /* iterate through all 16 fragments in a superblock */
488 for (j = 0; j < 16; j++) {
489 current_fragment += hilbert[j];
892fc83e 490 current_width += travel_width[j];
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491 current_height += travel_height[j];
492
493 /* check if the fragment is in bounds */
892fc83e 494 if ((current_width < right_edge) &&
d86053a4
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495 (current_height < bottom_edge)) {
496 s->superblock_fragments[mapping_index] = current_fragment;
892fc83e
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497 debug_init(" mapping fragment %d to superblock %d, position %d (%d/%d x %d/%d)\n",
498 s->superblock_fragments[mapping_index], i, j,
499 current_width, right_edge, current_height, bottom_edge);
d86053a4
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500 } else {
501 s->superblock_fragments[mapping_index] = -1;
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502 debug_init(" superblock %d, position %d has no fragment (%d/%d x %d/%d)\n",
503 i, j,
504 current_width, right_edge, current_height, bottom_edge);
d86053a4
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505 }
506
d86053a4
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507 mapping_index++;
508 }
509 }
510
511 /* initialize the superblock <-> macroblock mapping; iterate through
512 * all of the Y plane superblocks to build this mapping */
513 right_edge = s->macroblock_width;
514 bottom_edge = s->macroblock_height;
892fc83e 515 current_width = -1;
d86053a4 516 current_height = 0;
892fc83e
MM
517 superblock_row_inc = s->macroblock_width -
518 (s->y_superblock_width * 2 - s->macroblock_width);;
d86053a4
MM
519 hilbert = hilbert_walk_mb;
520 mapping_index = 0;
521 current_macroblock = -1;
522 for (i = 0; i < s->u_superblock_start; i++) {
523
96a7e73b 524 if (current_width >= right_edge - 1) {
d86053a4 525 /* reset width and move to next superblock row */
96a7e73b 526 current_width = -1;
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MM
527 current_height += 2;
528
529 /* macroblock is now at the start of a new superblock row */
530 current_macroblock += superblock_row_inc;
531 }
532
533 /* iterate through each potential macroblock in the superblock */
534 for (j = 0; j < 4; j++) {
535 current_macroblock += hilbert_walk_mb[j];
892fc83e 536 current_width += travel_width_mb[j];
d86053a4
MM
537 current_height += travel_height_mb[j];
538
539 /* check if the macroblock is in bounds */
892fc83e 540 if ((current_width < right_edge) &&
d86053a4
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541 (current_height < bottom_edge)) {
542 s->superblock_macroblocks[mapping_index] = current_macroblock;
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MM
543 debug_init(" mapping macroblock %d to superblock %d, position %d (%d/%d x %d/%d)\n",
544 s->superblock_macroblocks[mapping_index], i, j,
545 current_width, right_edge, current_height, bottom_edge);
d86053a4
MM
546 } else {
547 s->superblock_macroblocks[mapping_index] = -1;
96a7e73b
MM
548 debug_init(" superblock %d, position %d has no macroblock (%d/%d x %d/%d)\n",
549 i, j,
550 current_width, right_edge, current_height, bottom_edge);
d86053a4
MM
551 }
552
d86053a4
MM
553 mapping_index++;
554 }
555 }
556
557 /* initialize the macroblock <-> fragment mapping */
558 current_fragment = 0;
559 current_macroblock = 0;
560 mapping_index = 0;
561 for (i = 0; i < s->fragment_height; i += 2) {
562
563 for (j = 0; j < s->fragment_width; j += 2) {
564
565 debug_init(" macroblock %d contains fragments: ", current_macroblock);
566 s->all_fragments[current_fragment].macroblock = current_macroblock;
567 s->macroblock_fragments[mapping_index++] = current_fragment;
568 debug_init("%d ", current_fragment);
569
570 if (j + 1 < s->fragment_width) {
571 s->all_fragments[current_fragment + 1].macroblock = current_macroblock;
572 s->macroblock_fragments[mapping_index++] = current_fragment + 1;
573 debug_init("%d ", current_fragment + 1);
574 } else
575 s->macroblock_fragments[mapping_index++] = -1;
576
577 if (i + 1 < s->fragment_height) {
578 s->all_fragments[current_fragment + s->fragment_width].macroblock =
579 current_macroblock;
580 s->macroblock_fragments[mapping_index++] =
581 current_fragment + s->fragment_width;
582 debug_init("%d ", current_fragment + s->fragment_width);
583 } else
584 s->macroblock_fragments[mapping_index++] = -1;
585
586 if ((j + 1 < s->fragment_width) && (i + 1 < s->fragment_height)) {
587 s->all_fragments[current_fragment + s->fragment_width + 1].macroblock =
588 current_macroblock;
589 s->macroblock_fragments[mapping_index++] =
590 current_fragment + s->fragment_width + 1;
591 debug_init("%d ", current_fragment + s->fragment_width + 1);
592 } else
593 s->macroblock_fragments[mapping_index++] = -1;
594
595 /* C planes */
596 c_fragment = s->u_fragment_start +
597 (i * s->fragment_width / 4) + (j / 2);
892fc83e 598 s->all_fragments[c_fragment].macroblock = s->macroblock_count;
d86053a4
MM
599 s->macroblock_fragments[mapping_index++] = c_fragment;
600 debug_init("%d ", c_fragment);
601
602 c_fragment = s->v_fragment_start +
603 (i * s->fragment_width / 4) + (j / 2);
892fc83e 604 s->all_fragments[c_fragment].macroblock = s->macroblock_count;
d86053a4
MM
605 s->macroblock_fragments[mapping_index++] = c_fragment;
606 debug_init("%d ", c_fragment);
607
608 debug_init("\n");
609
610 if (j + 2 <= s->fragment_width)
611 current_fragment += 2;
612 else
613 current_fragment++;
614 current_macroblock++;
615 }
616
617 current_fragment += s->fragment_width;
618 }
892fc83e
MM
619
620 return 0; /* successful path out */
d86053a4
MM
621}
622
623/*
d86053a4
MM
624 * This function wipes out all of the fragment data.
625 */
626static void init_frame(Vp3DecodeContext *s, GetBitContext *gb)
627{
628 int i;
629
630 /* zero out all of the fragment information */
631 s->coded_fragment_list_index = 0;
632 for (i = 0; i < s->fragment_count; i++) {
d86053a4 633 s->all_fragments[i].coeff_count = 0;
7dc9ed11
MM
634 s->all_fragments[i].motion_x = 127;
635 s->all_fragments[i].motion_y = 127;
636 s->all_fragments[i].next_coeff= NULL;
7beddb12
MN
637 s->coeffs[i].index=
638 s->coeffs[i].coeff=0;
639 s->coeffs[i].next= NULL;
d86053a4
MM
640 }
641}
642
643/*
f44b08a5 644 * This function sets up the dequantization tables used for a particular
d86053a4
MM
645 * frame.
646 */
647static void init_dequantizer(Vp3DecodeContext *s)
648{
649
67335dbc 650 int ac_scale_factor = s->coded_ac_scale_factor[s->quality_index];
f44ee2c3 651 int dc_scale_factor = s->coded_dc_scale_factor[s->quality_index];
d86053a4
MM
652 int i, j;
653
654 debug_vp3(" vp3: initializing dequantization tables\n");
655
656 /*
657 * Scale dequantizers:
658 *
659 * quantizer * sf
660 * --------------
661 * 100
662 *
663 * where sf = dc_scale_factor for DC quantizer
67335dbc 664 * or ac_scale_factor for AC quantizer
d86053a4
MM
665 *
666 * Then, saturate the result to a lower limit of MIN_DEQUANT_VAL.
667 */
3d32b429 668#define SCALER 4
d86053a4
MM
669
670 /* scale DC quantizers */
f44ee2c3 671 s->intra_y_dequant[0] = s->coded_intra_y_dequant[0] * dc_scale_factor / 100;
d86053a4
MM
672 if (s->intra_y_dequant[0] < MIN_DEQUANT_VAL * 2)
673 s->intra_y_dequant[0] = MIN_DEQUANT_VAL * 2;
674 s->intra_y_dequant[0] *= SCALER;
675
f44ee2c3 676 s->intra_c_dequant[0] = s->coded_intra_c_dequant[0] * dc_scale_factor / 100;
d86053a4
MM
677 if (s->intra_c_dequant[0] < MIN_DEQUANT_VAL * 2)
678 s->intra_c_dequant[0] = MIN_DEQUANT_VAL * 2;
679 s->intra_c_dequant[0] *= SCALER;
680
f44ee2c3 681 s->inter_dequant[0] = s->coded_inter_dequant[0] * dc_scale_factor / 100;
d86053a4
MM
682 if (s->inter_dequant[0] < MIN_DEQUANT_VAL * 4)
683 s->inter_dequant[0] = MIN_DEQUANT_VAL * 4;
684 s->inter_dequant[0] *= SCALER;
685
686 /* scale AC quantizers, zigzag at the same time in preparation for
687 * the dequantization phase */
688 for (i = 1; i < 64; i++) {
36af0c95
MN
689 int k= s->scantable.scantable[i];
690 j = s->scantable.permutated[i];
d86053a4 691
36af0c95 692 s->intra_y_dequant[j] = s->coded_intra_y_dequant[k] * ac_scale_factor / 100;
d86053a4
MM
693 if (s->intra_y_dequant[j] < MIN_DEQUANT_VAL)
694 s->intra_y_dequant[j] = MIN_DEQUANT_VAL;
695 s->intra_y_dequant[j] *= SCALER;
696
36af0c95 697 s->intra_c_dequant[j] = s->coded_intra_c_dequant[k] * ac_scale_factor / 100;
d86053a4
MM
698 if (s->intra_c_dequant[j] < MIN_DEQUANT_VAL)
699 s->intra_c_dequant[j] = MIN_DEQUANT_VAL;
700 s->intra_c_dequant[j] *= SCALER;
701
36af0c95 702 s->inter_dequant[j] = s->coded_inter_dequant[k] * ac_scale_factor / 100;
d86053a4
MM
703 if (s->inter_dequant[j] < MIN_DEQUANT_VAL * 2)
704 s->inter_dequant[j] = MIN_DEQUANT_VAL * 2;
705 s->inter_dequant[j] *= SCALER;
706 }
b928ec64
MN
707
708 memset(s->qscale_table, (FFMAX(s->intra_y_dequant[1], s->intra_c_dequant[1])+8)/16, 512); //FIXME finetune
d86053a4
MM
709
710 /* print debug information as requested */
711 debug_dequantizers("intra Y dequantizers:\n");
712 for (i = 0; i < 8; i++) {
713 for (j = i * 8; j < i * 8 + 8; j++) {
714 debug_dequantizers(" %4d,", s->intra_y_dequant[j]);
715 }
716 debug_dequantizers("\n");
717 }
718 debug_dequantizers("\n");
719
720 debug_dequantizers("intra C dequantizers:\n");
721 for (i = 0; i < 8; i++) {
722 for (j = i * 8; j < i * 8 + 8; j++) {
723 debug_dequantizers(" %4d,", s->intra_c_dequant[j]);
724 }
725 debug_dequantizers("\n");
726 }
727 debug_dequantizers("\n");
728
729 debug_dequantizers("interframe dequantizers:\n");
730 for (i = 0; i < 8; i++) {
731 for (j = i * 8; j < i * 8 + 8; j++) {
732 debug_dequantizers(" %4d,", s->inter_dequant[j]);
733 }
734 debug_dequantizers("\n");
735 }
736 debug_dequantizers("\n");
737}
738
739/*
f44b08a5
MM
740 * This function initializes the loop filter boundary limits if the frame's
741 * quality index is different from the previous frame's.
742 */
743static void init_loop_filter(Vp3DecodeContext *s)
744{
745 int *bounding_values= s->bounding_values_array+127;
746 int filter_limit;
747 int x;
748
749 filter_limit = s->filter_limit_values[s->quality_index];
750
751 /* set up the bounding values */
752 memset(s->bounding_values_array, 0, 256 * sizeof(int));
753 for (x = 0; x < filter_limit; x++) {
754 bounding_values[-x - filter_limit] = -filter_limit + x;
755 bounding_values[-x] = -x;
756 bounding_values[x] = x;
757 bounding_values[x + filter_limit] = filter_limit - x;
758 }
759}
760
761/*
d86053a4
MM
762 * This function unpacks all of the superblock/macroblock/fragment coding
763 * information from the bitstream.
764 */
892fc83e 765static int unpack_superblocks(Vp3DecodeContext *s, GetBitContext *gb)
d86053a4
MM
766{
767 int bit = 0;
768 int current_superblock = 0;
769 int current_run = 0;
770 int decode_fully_flags = 0;
771 int decode_partial_blocks = 0;
22493ab9 772 int first_c_fragment_seen;
d86053a4
MM
773
774 int i, j;
775 int current_fragment;
776
777 debug_vp3(" vp3: unpacking superblock coding\n");
778
779 if (s->keyframe) {
780
781 debug_vp3(" keyframe-- all superblocks are fully coded\n");
782 memset(s->superblock_coding, SB_FULLY_CODED, s->superblock_count);
783
784 } else {
785
786 /* unpack the list of partially-coded superblocks */
787 bit = get_bits(gb, 1);
788 /* toggle the bit because as soon as the first run length is
789 * fetched the bit will be toggled again */
790 bit ^= 1;
791 while (current_superblock < s->superblock_count) {
b5da3635 792 if (current_run-- == 0) {
d86053a4 793 bit ^= 1;
d8278bab 794 current_run = get_vlc2(gb,
b5da3635
MN
795 s->superblock_run_length_vlc.table, 6, 2);
796 if (current_run == 33)
d8278bab 797 current_run += get_bits(gb, 12);
d86053a4
MM
798 debug_block_coding(" setting superblocks %d..%d to %s\n",
799 current_superblock,
800 current_superblock + current_run - 1,
801 (bit) ? "partially coded" : "not coded");
802
803 /* if any of the superblocks are not partially coded, flag
804 * a boolean to decode the list of fully-coded superblocks */
642d7e84 805 if (bit == 0) {
d86053a4 806 decode_fully_flags = 1;
642d7e84 807 } else {
d86053a4 808
642d7e84
MM
809 /* make a note of the fact that there are partially coded
810 * superblocks */
811 decode_partial_blocks = 1;
812 }
d86053a4 813 }
b5da3635 814 s->superblock_coding[current_superblock++] = bit;
d86053a4
MM
815 }
816
817 /* unpack the list of fully coded superblocks if any of the blocks were
818 * not marked as partially coded in the previous step */
819 if (decode_fully_flags) {
820
821 current_superblock = 0;
822 current_run = 0;
823 bit = get_bits(gb, 1);
824 /* toggle the bit because as soon as the first run length is
825 * fetched the bit will be toggled again */
826 bit ^= 1;
827 while (current_superblock < s->superblock_count) {
828
829 /* skip any superblocks already marked as partially coded */
830 if (s->superblock_coding[current_superblock] == SB_NOT_CODED) {
831
b5da3635 832 if (current_run-- == 0) {
d86053a4 833 bit ^= 1;
d8278bab 834 current_run = get_vlc2(gb,
b5da3635
MN
835 s->superblock_run_length_vlc.table, 6, 2);
836 if (current_run == 33)
d8278bab 837 current_run += get_bits(gb, 12);
d86053a4
MM
838 }
839
840 debug_block_coding(" setting superblock %d to %s\n",
841 current_superblock,
842 (bit) ? "fully coded" : "not coded");
b5da3635 843 s->superblock_coding[current_superblock] = 2*bit;
d86053a4
MM
844 }
845 current_superblock++;
846 }
847 }
848
849 /* if there were partial blocks, initialize bitstream for
850 * unpacking fragment codings */
851 if (decode_partial_blocks) {
852
853 current_run = 0;
854 bit = get_bits(gb, 1);
855 /* toggle the bit because as soon as the first run length is
856 * fetched the bit will be toggled again */
857 bit ^= 1;
858 }
859 }
860
861 /* figure out which fragments are coded; iterate through each
862 * superblock (all planes) */
863 s->coded_fragment_list_index = 0;
7beddb12 864 s->next_coeff= s->coeffs + s->fragment_count;
04331882
MM
865 s->first_coded_y_fragment = s->first_coded_c_fragment = 0;
866 s->last_coded_y_fragment = s->last_coded_c_fragment = -1;
22493ab9 867 first_c_fragment_seen = 0;
96a7e73b 868 memset(s->macroblock_coding, MODE_COPY, s->macroblock_count);
d86053a4
MM
869 for (i = 0; i < s->superblock_count; i++) {
870
871 /* iterate through all 16 fragments in a superblock */
872 for (j = 0; j < 16; j++) {
873
874 /* if the fragment is in bounds, check its coding status */
875 current_fragment = s->superblock_fragments[i * 16 + j];
892fc83e 876 if (current_fragment >= s->fragment_count) {
9b879566 877 av_log(s->avctx, AV_LOG_ERROR, " vp3:unpack_superblocks(): bad fragment number (%d >= %d)\n",
892fc83e
MM
878 current_fragment, s->fragment_count);
879 return 1;
880 }
d86053a4
MM
881 if (current_fragment != -1) {
882 if (s->superblock_coding[i] == SB_NOT_CODED) {
883
884 /* copy all the fragments from the prior frame */
885 s->all_fragments[current_fragment].coding_method =
886 MODE_COPY;
887
888 } else if (s->superblock_coding[i] == SB_PARTIALLY_CODED) {
889
890 /* fragment may or may not be coded; this is the case
891 * that cares about the fragment coding runs */
b5da3635 892 if (current_run-- == 0) {
d86053a4 893 bit ^= 1;
0ad72bdd 894 current_run = get_vlc2(gb,
b5da3635 895 s->fragment_run_length_vlc.table, 5, 2);
d86053a4
MM
896 }
897
898 if (bit) {
22493ab9
MM
899 /* default mode; actual mode will be decoded in
900 * the next phase */
d86053a4
MM
901 s->all_fragments[current_fragment].coding_method =
902 MODE_INTER_NO_MV;
7beddb12 903 s->all_fragments[current_fragment].next_coeff= s->coeffs + current_fragment;
04331882 904 s->coded_fragment_list[s->coded_fragment_list_index] =
d86053a4 905 current_fragment;
04331882 906 if ((current_fragment >= s->u_fragment_start) &&
22493ab9
MM
907 (s->last_coded_y_fragment == -1) &&
908 (!first_c_fragment_seen)) {
04331882
MM
909 s->first_coded_c_fragment = s->coded_fragment_list_index;
910 s->last_coded_y_fragment = s->first_coded_c_fragment - 1;
22493ab9 911 first_c_fragment_seen = 1;
04331882
MM
912 }
913 s->coded_fragment_list_index++;
96a7e73b 914 s->macroblock_coding[s->all_fragments[current_fragment].macroblock] = MODE_INTER_NO_MV;
d86053a4
MM
915 debug_block_coding(" superblock %d is partially coded, fragment %d is coded\n",
916 i, current_fragment);
917 } else {
918 /* not coded; copy this fragment from the prior frame */
919 s->all_fragments[current_fragment].coding_method =
920 MODE_COPY;
921 debug_block_coding(" superblock %d is partially coded, fragment %d is not coded\n",
922 i, current_fragment);
923 }
924
d86053a4
MM
925 } else {
926
927 /* fragments are fully coded in this superblock; actual
928 * coding will be determined in next step */
929 s->all_fragments[current_fragment].coding_method =
930 MODE_INTER_NO_MV;
7beddb12 931 s->all_fragments[current_fragment].next_coeff= s->coeffs + current_fragment;
04331882 932 s->coded_fragment_list[s->coded_fragment_list_index] =
d86053a4 933 current_fragment;
04331882 934 if ((current_fragment >= s->u_fragment_start) &&
22493ab9
MM
935 (s->last_coded_y_fragment == -1) &&
936 (!first_c_fragment_seen)) {
04331882
MM
937 s->first_coded_c_fragment = s->coded_fragment_list_index;
938 s->last_coded_y_fragment = s->first_coded_c_fragment - 1;
22493ab9 939 first_c_fragment_seen = 1;
04331882
MM
940 }
941 s->coded_fragment_list_index++;
96a7e73b 942 s->macroblock_coding[s->all_fragments[current_fragment].macroblock] = MODE_INTER_NO_MV;
d86053a4
MM
943 debug_block_coding(" superblock %d is fully coded, fragment %d is coded\n",
944 i, current_fragment);
945 }
946 }
947 }
948 }
04331882 949
22493ab9
MM
950 if (!first_c_fragment_seen)
951 /* only Y fragments coded in this frame */
04331882 952 s->last_coded_y_fragment = s->coded_fragment_list_index - 1;
22493ab9 953 else
642d7e84 954 /* end the list of coded C fragments */
04331882 955 s->last_coded_c_fragment = s->coded_fragment_list_index - 1;
22493ab9 956
04331882
MM
957 debug_block_coding(" %d total coded fragments, y: %d -> %d, c: %d -> %d\n",
958 s->coded_fragment_list_index,
959 s->first_coded_y_fragment,
960 s->last_coded_y_fragment,
961 s->first_coded_c_fragment,
962 s->last_coded_c_fragment);
892fc83e
MM
963
964 return 0;
d86053a4
MM
965}
966
967/*
968 * This function unpacks all the coding mode data for individual macroblocks
969 * from the bitstream.
970 */
892fc83e 971static int unpack_modes(Vp3DecodeContext *s, GetBitContext *gb)
d86053a4
MM
972{
973 int i, j, k;
974 int scheme;
975 int current_macroblock;
976 int current_fragment;
977 int coding_mode;
978
979 debug_vp3(" vp3: unpacking encoding modes\n");
980
981 if (s->keyframe) {
982 debug_vp3(" keyframe-- all blocks are coded as INTRA\n");
983
984 for (i = 0; i < s->fragment_count; i++)
985 s->all_fragments[i].coding_method = MODE_INTRA;
986
987 } else {
988
989 /* fetch the mode coding scheme for this frame */
990 scheme = get_bits(gb, 3);
991 debug_modes(" using mode alphabet %d\n", scheme);
992
993 /* is it a custom coding scheme? */
994 if (scheme == 0) {
995 debug_modes(" custom mode alphabet ahead:\n");
996 for (i = 0; i < 8; i++)
a466e345 997 ModeAlphabet[scheme][get_bits(gb, 3)] = i;
d86053a4
MM
998 }
999
1000 for (i = 0; i < 8; i++)
1001 debug_modes(" mode[%d][%d] = %d\n", scheme, i,
1002 ModeAlphabet[scheme][i]);
1003
1004 /* iterate through all of the macroblocks that contain 1 or more
1005 * coded fragments */
1006 for (i = 0; i < s->u_superblock_start; i++) {
1007
1008 for (j = 0; j < 4; j++) {
1009 current_macroblock = s->superblock_macroblocks[i * 4 + j];
1010 if ((current_macroblock == -1) ||
96a7e73b 1011 (s->macroblock_coding[current_macroblock] == MODE_COPY))
d86053a4 1012 continue;
892fc83e 1013 if (current_macroblock >= s->macroblock_count) {
9b879566 1014 av_log(s->avctx, AV_LOG_ERROR, " vp3:unpack_modes(): bad macroblock number (%d >= %d)\n",
892fc83e
MM
1015 current_macroblock, s->macroblock_count);
1016 return 1;
1017 }
d86053a4
MM
1018
1019 /* mode 7 means get 3 bits for each coding mode */
1020 if (scheme == 7)
1021 coding_mode = get_bits(gb, 3);
1022 else
0ad72bdd
MM
1023 coding_mode = ModeAlphabet[scheme]
1024 [get_vlc2(gb, s->mode_code_vlc.table, 3, 3)];
d86053a4 1025
96a7e73b 1026 s->macroblock_coding[current_macroblock] = coding_mode;
d86053a4
MM
1027 for (k = 0; k < 6; k++) {
1028 current_fragment =
1029 s->macroblock_fragments[current_macroblock * 6 + k];
892fc83e
MM
1030 if (current_fragment == -1)
1031 continue;
1032 if (current_fragment >= s->fragment_count) {
9b879566 1033 av_log(s->avctx, AV_LOG_ERROR, " vp3:unpack_modes(): bad fragment number (%d >= %d)\n",
892fc83e
MM
1034 current_fragment, s->fragment_count);
1035 return 1;
1036 }
d86053a4
MM
1037 if (s->all_fragments[current_fragment].coding_method !=
1038 MODE_COPY)
1039 s->all_fragments[current_fragment].coding_method =
1040 coding_mode;
1041 }
1042
1043 debug_modes(" coding method for macroblock starting @ fragment %d = %d\n",
1044 s->macroblock_fragments[current_macroblock * 6], coding_mode);
1045 }
1046 }
1047 }
892fc83e
MM
1048
1049 return 0;
44ae98dd
MM
1050}
1051
1052/*
d86053a4
MM
1053 * This function unpacks all the motion vectors for the individual
1054 * macroblocks from the bitstream.
1055 */
892fc83e 1056static int unpack_vectors(Vp3DecodeContext *s, GetBitContext *gb)
d86053a4
MM
1057{
1058 int i, j, k;
1059 int coding_mode;
1060 int motion_x[6];
1061 int motion_y[6];
1062 int last_motion_x = 0;
1063 int last_motion_y = 0;
1064 int prior_last_motion_x = 0;
1065 int prior_last_motion_y = 0;
1066 int current_macroblock;
1067 int current_fragment;
1068
1069 debug_vp3(" vp3: unpacking motion vectors\n");
d86053a4
MM
1070 if (s->keyframe) {
1071
1072 debug_vp3(" keyframe-- there are no motion vectors\n");
1073
1074 } else {
1075
1076 memset(motion_x, 0, 6 * sizeof(int));
1077 memset(motion_y, 0, 6 * sizeof(int));
1078
1079 /* coding mode 0 is the VLC scheme; 1 is the fixed code scheme */
1080 coding_mode = get_bits(gb, 1);
1081 debug_vectors(" using %s scheme for unpacking motion vectors\n",
1082 (coding_mode == 0) ? "VLC" : "fixed-length");
1083
1084 /* iterate through all of the macroblocks that contain 1 or more
1085 * coded fragments */
1086 for (i = 0; i < s->u_superblock_start; i++) {
1087
1088 for (j = 0; j < 4; j++) {
1089 current_macroblock = s->superblock_macroblocks[i * 4 + j];
1090 if ((current_macroblock == -1) ||
96a7e73b 1091 (s->macroblock_coding[current_macroblock] == MODE_COPY))
d86053a4 1092 continue;
892fc83e 1093 if (current_macroblock >= s->macroblock_count) {
9b879566 1094 av_log(s->avctx, AV_LOG_ERROR, " vp3:unpack_vectors(): bad macroblock number (%d >= %d)\n",
892fc83e
MM
1095 current_macroblock, s->macroblock_count);
1096 return 1;
1097 }
d86053a4
MM
1098
1099 current_fragment = s->macroblock_fragments[current_macroblock * 6];
892fc83e 1100 if (current_fragment >= s->fragment_count) {
9b879566 1101 av_log(s->avctx, AV_LOG_ERROR, " vp3:unpack_vectors(): bad fragment number (%d >= %d\n",
892fc83e
MM
1102 current_fragment, s->fragment_count);
1103 return 1;
1104 }
96a7e73b 1105 switch (s->macroblock_coding[current_macroblock]) {
d86053a4
MM
1106
1107 case MODE_INTER_PLUS_MV:
1108 case MODE_GOLDEN_MV:
1109 /* all 6 fragments use the same motion vector */
1110 if (coding_mode == 0) {
0ad72bdd
MM
1111 motion_x[0] = motion_vector_table[get_vlc2(gb, s->motion_vector_vlc.table, 6, 2)];
1112 motion_y[0] = motion_vector_table[get_vlc2(gb, s->motion_vector_vlc.table, 6, 2)];
d86053a4 1113 } else {
7f9926a4
MM
1114 motion_x[0] = fixed_motion_vector_table[get_bits(gb, 6)];
1115 motion_y[0] = fixed_motion_vector_table[get_bits(gb, 6)];
d86053a4 1116 }
7f9926a4 1117
d86053a4
MM
1118 for (k = 1; k < 6; k++) {
1119 motion_x[k] = motion_x[0];
1120 motion_y[k] = motion_y[0];
1121 }
1122
1123 /* vector maintenance, only on MODE_INTER_PLUS_MV */
642d7e84 1124 if (s->macroblock_coding[current_macroblock] ==
d86053a4
MM
1125 MODE_INTER_PLUS_MV) {
1126 prior_last_motion_x = last_motion_x;
1127 prior_last_motion_y = last_motion_y;
1128 last_motion_x = motion_x[0];
1129 last_motion_y = motion_y[0];
1130 }
1131 break;
1132
1133 case MODE_INTER_FOURMV:
1134 /* fetch 4 vectors from the bitstream, one for each
1135 * Y fragment, then average for the C fragment vectors */
1136 motion_x[4] = motion_y[4] = 0;
1137 for (k = 0; k < 4; k++) {
1138 if (coding_mode == 0) {
f4daf33e
MM
1139 motion_x[k] = motion_vector_table[get_vlc2(gb, s->motion_vector_vlc.table, 6, 2)];
1140 motion_y[k] = motion_vector_table[get_vlc2(gb, s->motion_vector_vlc.table, 6, 2)];
d86053a4 1141 } else {
7f9926a4
MM
1142 motion_x[k] = fixed_motion_vector_table[get_bits(gb, 6)];
1143 motion_y[k] = fixed_motion_vector_table[get_bits(gb, 6)];
d86053a4
MM
1144 }
1145 motion_x[4] += motion_x[k];
1146 motion_y[4] += motion_y[k];
1147 }
1148
1149 if (motion_x[4] >= 0)
1150 motion_x[4] = (motion_x[4] + 2) / 4;
1151 else
1152 motion_x[4] = (motion_x[4] - 2) / 4;
1153 motion_x[5] = motion_x[4];
1154
1155 if (motion_y[4] >= 0)
1156 motion_y[4] = (motion_y[4] + 2) / 4;
1157 else
1158 motion_y[4] = (motion_y[4] - 2) / 4;
1159 motion_y[5] = motion_y[4];
1160
1161 /* vector maintenance; vector[3] is treated as the
1162 * last vector in this case */
1163 prior_last_motion_x = last_motion_x;
1164 prior_last_motion_y = last_motion_y;
1165 last_motion_x = motion_x[3];
1166 last_motion_y = motion_y[3];
1167 break;
1168
1169 case MODE_INTER_LAST_MV:
1170 /* all 6 fragments use the last motion vector */
1171 motion_x[0] = last_motion_x;
1172 motion_y[0] = last_motion_y;
1173 for (k = 1; k < 6; k++) {
1174 motion_x[k] = motion_x[0];
1175 motion_y[k] = motion_y[0];
1176 }
1177
1178 /* no vector maintenance (last vector remains the
1179 * last vector) */
1180 break;
1181
1182 case MODE_INTER_PRIOR_LAST:
1183 /* all 6 fragments use the motion vector prior to the
1184 * last motion vector */
1185 motion_x[0] = prior_last_motion_x;
1186 motion_y[0] = prior_last_motion_y;
1187 for (k = 1; k < 6; k++) {
1188 motion_x[k] = motion_x[0];
1189 motion_y[k] = motion_y[0];
1190 }
1191
1192 /* vector maintenance */
1193 prior_last_motion_x = last_motion_x;
1194 prior_last_motion_y = last_motion_y;
1195 last_motion_x = motion_x[0];
1196 last_motion_y = motion_y[0];
1197 break;
44ae98dd
MM
1198
1199 default:
1200 /* covers intra, inter without MV, golden without MV */
1201 memset(motion_x, 0, 6 * sizeof(int));
1202 memset(motion_y, 0, 6 * sizeof(int));
1203
1204 /* no vector maintenance */
1205 break;
d86053a4
MM
1206 }
1207
1208 /* assign the motion vectors to the correct fragments */
1209 debug_vectors(" vectors for macroblock starting @ fragment %d (coding method %d):\n",
1210 current_fragment,
642d7e84 1211 s->macroblock_coding[current_macroblock]);
d86053a4
MM
1212 for (k = 0; k < 6; k++) {
1213 current_fragment =
1214 s->macroblock_fragments[current_macroblock * 6 + k];
892fc83e
MM
1215 if (current_fragment == -1)
1216 continue;
1217 if (current_fragment >= s->fragment_count) {
9b879566 1218 av_log(s->avctx, AV_LOG_ERROR, " vp3:unpack_vectors(): bad fragment number (%d >= %d)\n",
892fc83e
MM
1219 current_fragment, s->fragment_count);
1220 return 1;
1221 }
d86053a4 1222 s->all_fragments[current_fragment].motion_x = motion_x[k];
44ae98dd 1223 s->all_fragments[current_fragment].motion_y = motion_y[k];
642d7e84
MM
1224 debug_vectors(" vector %d: fragment %d = (%d, %d)\n",
1225 k, current_fragment, motion_x[k], motion_y[k]);
d86053a4
MM
1226 }
1227 }
1228 }
1229 }
892fc83e
MM
1230
1231 return 0;
d86053a4
MM
1232}
1233
1234/*
1235 * This function is called by unpack_dct_coeffs() to extract the VLCs from
1236 * the bitstream. The VLCs encode tokens which are used to unpack DCT
1237 * data. This function unpacks all the VLCs for either the Y plane or both
1238 * C planes, and is called for DC coefficients or different AC coefficient
1239 * levels (since different coefficient types require different VLC tables.
1240 *
1241 * This function returns a residual eob run. E.g, if a particular token gave
1242 * instructions to EOB the next 5 fragments and there were only 2 fragments
1243 * left in the current fragment range, 3 would be returned so that it could
1244 * be passed into the next call to this same function.
1245 */
1246static int unpack_vlcs(Vp3DecodeContext *s, GetBitContext *gb,
1247 VLC *table, int coeff_index,
1248 int first_fragment, int last_fragment,
1249 int eob_run)
1250{
1251 int i;
1252 int token;
d3076955
MM
1253 int zero_run = 0;
1254 DCTELEM coeff = 0;
d86053a4 1255 Vp3Fragment *fragment;
36af0c95 1256 uint8_t *perm= s->scantable.permutated;
d3076955 1257 int bits_to_get;
d86053a4 1258
22493ab9 1259 if ((first_fragment >= s->fragment_count) ||
74c0ac12
MM
1260 (last_fragment >= s->fragment_count)) {
1261
9b879566 1262 av_log(s->avctx, AV_LOG_ERROR, " vp3:unpack_vlcs(): bad fragment number (%d -> %d ?)\n",
74c0ac12 1263 first_fragment, last_fragment);
22493ab9 1264 return 0;
74c0ac12
MM
1265 }
1266
04331882 1267 for (i = first_fragment; i <= last_fragment; i++) {
d86053a4
MM
1268
1269 fragment = &s->all_fragments[s->coded_fragment_list[i]];
1270 if (fragment->coeff_count > coeff_index)
1271 continue;
1272
1273 if (!eob_run) {
1274 /* decode a VLC into a token */
1275 token = get_vlc2(gb, table->table, 5, 3);
1276 debug_vlc(" token = %2d, ", token);
1277 /* use the token to get a zero run, a coefficient, and an eob run */
d3076955
MM
1278 if (token <= 6) {
1279 eob_run = eob_run_base[token];
1280 if (eob_run_get_bits[token])
1281 eob_run += get_bits(gb, eob_run_get_bits[token]);
1282 coeff = zero_run = 0;
1283 } else {
1284 bits_to_get = coeff_get_bits[token];
1285 if (!bits_to_get)
1286 coeff = coeff_tables[token][0];
1287 else
1288 coeff = coeff_tables[token][get_bits(gb, bits_to_get)];
1289
1290 zero_run = zero_run_base[token];
1291 if (zero_run_get_bits[token])
1292 zero_run += get_bits(gb, zero_run_get_bits[token]);
1293 }
d86053a4
MM
1294 }
1295
1296 if (!eob_run) {
1297 fragment->coeff_count += zero_run;
7beddb12
MN
1298 if (fragment->coeff_count < 64){
1299 fragment->next_coeff->coeff= coeff;
1300 fragment->next_coeff->index= perm[fragment->coeff_count++]; //FIXME perm here already?
1301 fragment->next_coeff->next= s->next_coeff;
1302 s->next_coeff->next=NULL;
1303 fragment->next_coeff= s->next_coeff++;
1304 }
d86053a4 1305 debug_vlc(" fragment %d coeff = %d\n",
7beddb12 1306 s->coded_fragment_list[i], fragment->next_coeff[coeff_index]);
d86053a4 1307 } else {
7beddb12 1308 fragment->coeff_count |= 128;
d86053a4 1309 debug_vlc(" fragment %d eob with %d coefficients\n",
7beddb12 1310 s->coded_fragment_list[i], fragment->coeff_count&127);
d86053a4
MM
1311 eob_run--;
1312 }
1313 }
1314
1315 return eob_run;
1316}
1317
1318/*
1319 * This function unpacks all of the DCT coefficient data from the
1320 * bitstream.
1321 */
892fc83e 1322static int unpack_dct_coeffs(Vp3DecodeContext *s, GetBitContext *gb)
d86053a4
MM
1323{
1324 int i;
1325 int dc_y_table;
1326 int dc_c_table;
1327 int ac_y_table;
1328 int ac_c_table;
1329 int residual_eob_run = 0;
1330
d86053a4
MM
1331 /* fetch the DC table indices */
1332 dc_y_table = get_bits(gb, 4);
1333 dc_c_table = get_bits(gb, 4);
1334
1335 /* unpack the Y plane DC coefficients */
1336 debug_vp3(" vp3: unpacking Y plane DC coefficients using table %d\n",
1337 dc_y_table);
1338 residual_eob_run = unpack_vlcs(s, gb, &s->dc_vlc[dc_y_table], 0,
04331882 1339 s->first_coded_y_fragment, s->last_coded_y_fragment, residual_eob_run);
d86053a4
MM
1340
1341 /* unpack the C plane DC coefficients */
1342 debug_vp3(" vp3: unpacking C plane DC coefficients using table %d\n",
1343 dc_c_table);
1344 residual_eob_run = unpack_vlcs(s, gb, &s->dc_vlc[dc_c_table], 0,
04331882 1345 s->first_coded_c_fragment, s->last_coded_c_fragment, residual_eob_run);
d86053a4 1346
a466e345 1347 /* fetch the AC table indices */
d86053a4
MM
1348 ac_y_table = get_bits(gb, 4);
1349 ac_c_table = get_bits(gb, 4);
1350
a466e345 1351 /* unpack the group 1 AC coefficients (coeffs 1-5) */
d86053a4
MM
1352 for (i = 1; i <= 5; i++) {
1353
1354 debug_vp3(" vp3: unpacking level %d Y plane AC coefficients using table %d\n",
1355 i, ac_y_table);
1356 residual_eob_run = unpack_vlcs(s, gb, &s->ac_vlc_1[ac_y_table], i,
04331882 1357 s->first_coded_y_fragment, s->last_coded_y_fragment, residual_eob_run);
d86053a4
MM
1358
1359 debug_vp3(" vp3: unpacking level %d C plane AC coefficients using table %d\n",
1360 i, ac_c_table);
1361 residual_eob_run = unpack_vlcs(s, gb, &s->ac_vlc_1[ac_c_table], i,
04331882 1362 s->first_coded_c_fragment, s->last_coded_c_fragment, residual_eob_run);
d86053a4
MM
1363 }
1364
a466e345 1365 /* unpack the group 2 AC coefficients (coeffs 6-14) */
d86053a4
MM
1366 for (i = 6; i <= 14; i++) {
1367
1368 debug_vp3(" vp3: unpacking level %d Y plane AC coefficients using table %d\n",
1369 i, ac_y_table);
1370 residual_eob_run = unpack_vlcs(s, gb, &s->ac_vlc_2[ac_y_table], i,
04331882 1371 s->first_coded_y_fragment, s->last_coded_y_fragment, residual_eob_run);
d86053a4
MM
1372
1373 debug_vp3(" vp3: unpacking level %d C plane AC coefficients using table %d\n",
1374 i, ac_c_table);
1375 residual_eob_run = unpack_vlcs(s, gb, &s->ac_vlc_2[ac_c_table], i,
04331882 1376 s->first_coded_c_fragment, s->last_coded_c_fragment, residual_eob_run);
d86053a4
MM
1377 }
1378
a466e345 1379 /* unpack the group 3 AC coefficients (coeffs 15-27) */
d86053a4
MM
1380 for (i = 15; i <= 27; i++) {
1381
1382 debug_vp3(" vp3: unpacking level %d Y plane AC coefficients using table %d\n",
1383 i, ac_y_table);
1384 residual_eob_run = unpack_vlcs(s, gb, &s->ac_vlc_3[ac_y_table], i,
04331882 1385 s->first_coded_y_fragment, s->last_coded_y_fragment, residual_eob_run);
d86053a4
MM
1386
1387 debug_vp3(" vp3: unpacking level %d C plane AC coefficients using table %d\n",
1388 i, ac_c_table);
1389 residual_eob_run = unpack_vlcs(s, gb, &s->ac_vlc_3[ac_c_table], i,
04331882 1390 s->first_coded_c_fragment, s->last_coded_c_fragment, residual_eob_run);
d86053a4
MM
1391 }
1392
a466e345 1393 /* unpack the group 4 AC coefficients (coeffs 28-63) */
d86053a4
MM
1394 for (i = 28; i <= 63; i++) {
1395
1396 debug_vp3(" vp3: unpacking level %d Y plane AC coefficients using table %d\n",
1397 i, ac_y_table);
1398 residual_eob_run = unpack_vlcs(s, gb, &s->ac_vlc_4[ac_y_table], i,
04331882 1399 s->first_coded_y_fragment, s->last_coded_y_fragment, residual_eob_run);
d86053a4
MM
1400
1401 debug_vp3(" vp3: unpacking level %d C plane AC coefficients using table %d\n",
1402 i, ac_c_table);
1403 residual_eob_run = unpack_vlcs(s, gb, &s->ac_vlc_4[ac_c_table], i,
04331882 1404 s->first_coded_c_fragment, s->last_coded_c_fragment, residual_eob_run);
d86053a4 1405 }
892fc83e
MM
1406
1407 return 0;
d86053a4
MM
1408}
1409
1410/*
1411 * This function reverses the DC prediction for each coded fragment in
1412 * the frame. Much of this function is adapted directly from the original
1413 * VP3 source code.
1414 */
1415#define COMPATIBLE_FRAME(x) \
1416 (compatible_frame[s->all_fragments[x].coding_method] == current_frame_type)
1417#define FRAME_CODED(x) (s->all_fragments[x].coding_method != MODE_COPY)
7beddb12 1418#define DC_COEFF(u) (s->coeffs[u].index ? 0 : s->coeffs[u].coeff) //FIXME do somethin to simplify this
d86053a4
MM
1419static inline int iabs (int x) { return ((x < 0) ? -x : x); }
1420
1421static void reverse_dc_prediction(Vp3DecodeContext *s,
1422 int first_fragment,
1423 int fragment_width,
1424 int fragment_height)
1425{
1426
1427#define PUL 8
1428#define PU 4
1429#define PUR 2
1430#define PL 1
1431
1432 int x, y;
1433 int i = first_fragment;
1434
1435 /*
1436 * Fragment prediction groups:
1437 *
1438 * 32222222226
1439 * 10000000004
1440 * 10000000004
1441 * 10000000004
1442 * 10000000004
1443 *
1444 * Note: Groups 5 and 7 do not exist as it would mean that the
1445 * fragment's x coordinate is both 0 and (width - 1) at the same time.
1446 */
1447 int predictor_group;
1448 short predicted_dc;
1449
1450 /* validity flags for the left, up-left, up, and up-right fragments */
1451 int fl, ful, fu, fur;
1452
1453 /* DC values for the left, up-left, up, and up-right fragments */
1454 int vl, vul, vu, vur;
1455
1456 /* indices for the left, up-left, up, and up-right fragments */
1457 int l, ul, u, ur;
1458
1459 /*
1460 * The 6 fields mean:
1461 * 0: up-left multiplier
1462 * 1: up multiplier
1463 * 2: up-right multiplier
1464 * 3: left multiplier
1465 * 4: mask
1466 * 5: right bit shift divisor (e.g., 7 means >>=7, a.k.a. div by 128)
1467 */
1468 int predictor_transform[16][6] = {
1469 { 0, 0, 0, 0, 0, 0 },
1470 { 0, 0, 0, 1, 0, 0 }, // PL
1471 { 0, 0, 1, 0, 0, 0 }, // PUR
1472 { 0, 0, 53, 75, 127, 7 }, // PUR|PL
1473 { 0, 1, 0, 0, 0, 0 }, // PU
1474 { 0, 1, 0, 1, 1, 1 }, // PU|PL
1475 { 0, 1, 0, 0, 0, 0 }, // PU|PUR
1476 { 0, 0, 53, 75, 127, 7 }, // PU|PUR|PL
1477 { 1, 0, 0, 0, 0, 0 }, // PUL
1478 { 0, 0, 0, 1, 0, 0 }, // PUL|PL
1479 { 1, 0, 1, 0, 1, 1 }, // PUL|PUR
1480 { 0, 0, 53, 75, 127, 7 }, // PUL|PUR|PL
1481 { 0, 1, 0, 0, 0, 0 }, // PUL|PU
1482 {-26, 29, 0, 29, 31, 5 }, // PUL|PU|PL
1483 { 3, 10, 3, 0, 15, 4 }, // PUL|PU|PUR
1484 {-26, 29, 0, 29, 31, 5 } // PUL|PU|PUR|PL
1485 };
1486
1487 /* This table shows which types of blocks can use other blocks for
1488 * prediction. For example, INTRA is the only mode in this table to
1489 * have a frame number of 0. That means INTRA blocks can only predict
1490 * from other INTRA blocks. There are 2 golden frame coding types;
1491 * blocks encoding in these modes can only predict from other blocks
1492 * that were encoded with these 1 of these 2 modes. */
1493 unsigned char compatible_frame[8] = {
1494 1, /* MODE_INTER_NO_MV */
1495 0, /* MODE_INTRA */
1496 1, /* MODE_INTER_PLUS_MV */
1497 1, /* MODE_INTER_LAST_MV */
1498 1, /* MODE_INTER_PRIOR_MV */
1499 2, /* MODE_USING_GOLDEN */
1500 2, /* MODE_GOLDEN_MV */
1501 1 /* MODE_INTER_FOUR_MV */
1502 };
1503 int current_frame_type;
1504
1505 /* there is a last DC predictor for each of the 3 frame types */
1506 short last_dc[3];
1507
1508 int transform = 0;
1509
1510 debug_vp3(" vp3: reversing DC prediction\n");
1511
1512 vul = vu = vur = vl = 0;
1513 last_dc[0] = last_dc[1] = last_dc[2] = 0;
1514
1515 /* for each fragment row... */
1516 for (y = 0; y < fragment_height; y++) {
1517
1518 /* for each fragment in a row... */
1519 for (x = 0; x < fragment_width; x++, i++) {
1520
1521 /* reverse prediction if this block was coded */
1522 if (s->all_fragments[i].coding_method != MODE_COPY) {
1523
1524 current_frame_type =
1525 compatible_frame[s->all_fragments[i].coding_method];
1526 predictor_group = (x == 0) + ((y == 0) << 1) +
1527 ((x + 1 == fragment_width) << 2);
1528 debug_dc_pred(" frag %d: group %d, orig DC = %d, ",
7beddb12 1529 i, predictor_group, DC_COEFF(i));
d86053a4
MM
1530
1531 switch (predictor_group) {
1532
1533 case 0:
1534 /* main body of fragments; consider all 4 possible
1535 * fragments for prediction */
1536
1537 /* calculate the indices of the predicting fragments */
1538 ul = i - fragment_width - 1;
1539 u = i - fragment_width;
1540 ur = i - fragment_width + 1;
1541 l = i - 1;
1542
1543 /* fetch the DC values for the predicting fragments */
7beddb12
MN
1544 vul = DC_COEFF(ul);
1545 vu = DC_COEFF(u);
1546 vur = DC_COEFF(ur);
1547 vl = DC_COEFF(l);
d86053a4
MM
1548
1549 /* figure out which fragments are valid */
1550 ful = FRAME_CODED(ul) && COMPATIBLE_FRAME(ul);
1551 fu = FRAME_CODED(u) && COMPATIBLE_FRAME(u);
1552 fur = FRAME_CODED(ur) && COMPATIBLE_FRAME(ur);
1553 fl = FRAME_CODED(l) && COMPATIBLE_FRAME(l);
1554
1555 /* decide which predictor transform to use */
1556 transform = (fl*PL) | (fu*PU) | (ful*PUL) | (fur*PUR);
1557
1558 break;
1559
1560 case 1:
1561 /* left column of fragments, not including top corner;
1562 * only consider up and up-right fragments */
1563
1564 /* calculate the indices of the predicting fragments */
1565 u = i - fragment_width;
1566 ur = i - fragment_width + 1;
1567
1568 /* fetch the DC values for the predicting fragments */
7beddb12
MN
1569 vu = DC_COEFF(u);
1570 vur = DC_COEFF(ur);
d86053a4
MM
1571
1572 /* figure out which fragments are valid */
1573 fur = FRAME_CODED(ur) && COMPATIBLE_FRAME(ur);
1574 fu = FRAME_CODED(u) && COMPATIBLE_FRAME(u);
1575
1576 /* decide which predictor transform to use */
1577 transform = (fu*PU) | (fur*PUR);
1578
1579 break;
1580
1581 case 2:
1582 case 6:
1583 /* top row of fragments, not including top-left frag;
1584 * only consider the left fragment for prediction */
1585
1586 /* calculate the indices of the predicting fragments */
1587 l = i - 1;
1588
1589 /* fetch the DC values for the predicting fragments */
7beddb12 1590 vl = DC_COEFF(l);
d86053a4
MM
1591
1592 /* figure out which fragments are valid */
1593 fl = FRAME_CODED(l) && COMPATIBLE_FRAME(l);
1594
1595 /* decide which predictor transform to use */
1596 transform = (fl*PL);
1597
1598 break;
1599
1600 case 3:
1601 /* top-left fragment */
1602
1603 /* nothing to predict from in this case */
1604 transform = 0;
1605
1606 break;
1607
1608 case 4:
1609 /* right column of fragments, not including top corner;
1610 * consider up-left, up, and left fragments for
1611 * prediction */
1612
1613 /* calculate the indices of the predicting fragments */
1614 ul = i - fragment_width - 1;
1615 u = i - fragment_width;
1616 l = i - 1;
1617
1618 /* fetch the DC values for the predicting fragments */
7beddb12
MN
1619 vul = DC_COEFF(ul);
1620 vu = DC_COEFF(u);
1621 vl = DC_COEFF(l);
d86053a4
MM
1622
1623 /* figure out which fragments are valid */
1624 ful = FRAME_CODED(ul) && COMPATIBLE_FRAME(ul);
1625 fu = FRAME_CODED(u) && COMPATIBLE_FRAME(u);
1626 fl = FRAME_CODED(l) && COMPATIBLE_FRAME(l);
1627
1628 /* decide which predictor transform to use */
1629 transform = (fl*PL) | (fu*PU) | (ful*PUL);
1630
1631 break;
1632
1633 }
1634
1635 debug_dc_pred("transform = %d, ", transform);
1636
1637 if (transform == 0) {
1638
1639 /* if there were no fragments to predict from, use last
1640 * DC saved */
7beddb12 1641 predicted_dc = last_dc[current_frame_type];
d86053a4 1642 debug_dc_pred("from last DC (%d) = %d\n",
7beddb12 1643 current_frame_type, DC_COEFF(i));
d86053a4
MM
1644
1645 } else {
1646
1647 /* apply the appropriate predictor transform */
1648 predicted_dc =
1649 (predictor_transform[transform][0] * vul) +
1650 (predictor_transform[transform][1] * vu) +
1651 (predictor_transform[transform][2] * vur) +
1652 (predictor_transform[transform][3] * vl);
1653
1654 /* if there is a shift value in the transform, add
1655 * the sign bit before the shift */
1656 if (predictor_transform[transform][5] != 0) {
1657 predicted_dc += ((predicted_dc >> 15) &
1658 predictor_transform[transform][4]);
1659 predicted_dc >>= predictor_transform[transform][5];
1660 }
1661
1662 /* check for outranging on the [ul u l] and
1663 * [ul u ur l] predictors */
1664 if ((transform == 13) || (transform == 15)) {
1665 if (iabs(predicted_dc - vu) > 128)
1666 predicted_dc = vu;
1667 else if (iabs(predicted_dc - vl) > 128)
1668 predicted_dc = vl;
1669 else if (iabs(predicted_dc - vul) > 128)
1670 predicted_dc = vul;
1671 }
1672
d86053a4 1673 debug_dc_pred("from pred DC = %d\n",
7beddb12 1674 DC_COEFF(i));
d86053a4
MM
1675 }
1676
7beddb12
MN
1677 /* at long last, apply the predictor */
1678 if(s->coeffs[i].index){
1679 *s->next_coeff= s->coeffs[i];
1680 s->coeffs[i].index=0;
1681 s->coeffs[i].coeff=0;
1682 s->coeffs[i].next= s->next_coeff++;
1683 }
1684 s->coeffs[i].coeff += predicted_dc;
d86053a4 1685 /* save the DC */
7beddb12
MN
1686 last_dc[current_frame_type] = DC_COEFF(i);
1687 if(DC_COEFF(i) && !(s->all_fragments[i].coeff_count&127)){
1688 s->all_fragments[i].coeff_count= 129;
1689// s->all_fragments[i].next_coeff= s->next_coeff;
1690 s->coeffs[i].next= s->next_coeff;
1691 (s->next_coeff++)->next=NULL;
1692 }
d86053a4
MM
1693 }
1694 }
1695 }
1696}
1697
f44b08a5
MM
1698
1699static void horizontal_filter(unsigned char *first_pixel, int stride,
1700 int *bounding_values);
1701static void vertical_filter(unsigned char *first_pixel, int stride,
1702 int *bounding_values);
1703
d86053a4 1704/*
dc4b78d9
MM
1705 * Perform the final rendering for a particular slice of data.
1706 * The slice number ranges from 0..(macroblock_height - 1).
1707 */
1708static void render_slice(Vp3DecodeContext *s, int slice)
1709{
1710 int x, y;
1711 int m, n;
1712 int i; /* indicates current fragment */
1713 int16_t *dequantizer;
1714 DCTELEM __align16 block[64];
1715 unsigned char *output_plane;
1716 unsigned char *last_plane;
1717 unsigned char *golden_plane;
1718 int stride;
1719 int motion_x = 0xdeadbeef, motion_y = 0xdeadbeef;
1720 int upper_motion_limit, lower_motion_limit;
1721 int motion_halfpel_index;
1722 uint8_t *motion_source;
1723 int plane;
1724 int plane_width;
1725 int plane_height;
1726 int slice_height;
1727 int current_macroblock_entry = slice * s->macroblock_width * 6;
f44b08a5 1728 int fragment_width;
dc4b78d9
MM
1729
1730 if (slice >= s->macroblock_height)
1731 return;
1732
1733 for (plane = 0; plane < 3; plane++) {
1734
1735 /* set up plane-specific parameters */
1736 if (plane == 0) {
1737 output_plane = s->current_frame.data[0];
1738 last_plane = s->last_frame.data[0];
1739 golden_plane = s->golden_frame.data[0];
1740 stride = s->current_frame.linesize[0];
1741 if (!s->flipped_image) stride = -stride;
1742 upper_motion_limit = 7 * s->current_frame.linesize[0];
1743 lower_motion_limit = s->height * s->current_frame.linesize[0] + s->width - 8;
1744 y = slice * FRAGMENT_PIXELS * 2;
1745 plane_width = s->width;
1746 plane_height = s->height;
1747 slice_height = y + FRAGMENT_PIXELS * 2;
1748 i = s->macroblock_fragments[current_macroblock_entry + 0];
1749 } else if (plane == 1) {
1750 output_plane = s->current_frame.data[1];
1751 last_plane = s->last_frame.data[1];
1752 golden_plane = s->golden_frame.data[1];
1753 stride = s->current_frame.linesize[1];
1754 if (!s->flipped_image) stride = -stride;
1755 upper_motion_limit = 7 * s->current_frame.linesize[1];
1756 lower_motion_limit = (s->height / 2) * s->current_frame.linesize[1] + (s->width / 2) - 8;
1757 y = slice * FRAGMENT_PIXELS;
1758 plane_width = s->width / 2;
1759 plane_height = s->height / 2;
1760 slice_height = y + FRAGMENT_PIXELS;
1761 i = s->macroblock_fragments[current_macroblock_entry + 4];
1762 } else {
1763 output_plane = s->current_frame.data[2];
1764 last_plane = s->last_frame.data[2];
1765 golden_plane = s->golden_frame.data[2];
1766 stride = s->current_frame.linesize[2];
1767 if (!s->flipped_image) stride = -stride;
1768 upper_motion_limit = 7 * s->current_frame.linesize[2];
1769 lower_motion_limit = (s->height / 2) * s->current_frame.linesize[2] + (s->width / 2) - 8;
1770 y = slice * FRAGMENT_PIXELS;
1771 plane_width = s->width / 2;
1772 plane_height = s->height / 2;
1773 slice_height = y + FRAGMENT_PIXELS;
1774 i = s->macroblock_fragments[current_macroblock_entry + 5];
1775 }
2935001c 1776 fragment_width = plane_width / FRAGMENT_PIXELS;
dc4b78d9
MM
1777
1778 if(ABS(stride) > 2048)
1779 return; //various tables are fixed size
1780
1781 /* for each fragment row in the slice (both of them)... */
1782 for (; y < slice_height; y += 8) {
1783
1784 /* for each fragment in a row... */
1785 for (x = 0; x < plane_width; x += 8, i++) {
1786
1787 if ((i < 0) || (i >= s->fragment_count)) {
1788 av_log(s->avctx, AV_LOG_ERROR, " vp3:render_slice(): bad fragment number (%d)\n", i);
1789 return;
1790 }
1791
1792 /* transform if this block was coded */
1793 if ((s->all_fragments[i].coding_method != MODE_COPY) &&
1794 !((s->avctx->flags & CODEC_FLAG_GRAY) && plane)) {
1795
1796 if ((s->all_fragments[i].coding_method == MODE_USING_GOLDEN) ||
1797 (s->all_fragments[i].coding_method == MODE_GOLDEN_MV))
1798 motion_source= golden_plane;
1799 else
1800 motion_source= last_plane;
1801
1802 motion_source += s->all_fragments[i].first_pixel;
1803 motion_halfpel_index = 0;
1804
1805 /* sort out the motion vector if this fragment is coded
1806 * using a motion vector method */
1807 if ((s->all_fragments[i].coding_method > MODE_INTRA) &&
1808 (s->all_fragments[i].coding_method != MODE_USING_GOLDEN)) {
1809 int src_x, src_y;
1810 motion_x = s->all_fragments[i].motion_x;
1811 motion_y = s->all_fragments[i].motion_y;
1812 if(plane){
1813 motion_x= (motion_x>>1) | (motion_x&1);
1814 motion_y= (motion_y>>1) | (motion_y&1);
1815 }
1816
1817 src_x= (motion_x>>1) + x;
1818 src_y= (motion_y>>1) + y;
1819 if ((motion_x == 127) || (motion_y == 127))
1820 av_log(s->avctx, AV_LOG_ERROR, " help! got invalid motion vector! (%X, %X)\n", motion_x, motion_y);
1821
1822 motion_halfpel_index = motion_x & 0x01;
1823 motion_source += (motion_x >> 1);
1824
1825 motion_halfpel_index |= (motion_y & 0x01) << 1;
1826 motion_source += ((motion_y >> 1) * stride);
1827
1828 if(src_x<0 || src_y<0 || src_x + 9 >= plane_width || src_y + 9 >= plane_height){
1829 uint8_t *temp= s->edge_emu_buffer;
1830 if(stride<0) temp -= 9*stride;
1831 else temp += 9*stride;
1832
1833 ff_emulated_edge_mc(temp, motion_source, stride, 9, 9, src_x, src_y, plane_width, plane_height);
1834 motion_source= temp;
1835 }
1836 }
1837
1838
1839 /* first, take care of copying a block from either the
1840 * previous or the golden frame */
1841 if (s->all_fragments[i].coding_method != MODE_INTRA) {
1842 /* Note, it is possible to implement all MC cases with
1843 put_no_rnd_pixels_l2 which would look more like the
1844 VP3 source but this would be slower as
1845 put_no_rnd_pixels_tab is better optimzed */
1846 if(motion_halfpel_index != 3){
1847 s->dsp.put_no_rnd_pixels_tab[1][motion_halfpel_index](
1848 output_plane + s->all_fragments[i].first_pixel,
1849 motion_source, stride, 8);
1850 }else{
1851 int d= (motion_x ^ motion_y)>>31; // d is 0 if motion_x and _y have the same sign, else -1
1852 s->dsp.put_no_rnd_pixels_l2[1](
1853 output_plane + s->all_fragments[i].first_pixel,
1854 motion_source - d,
1855 motion_source + stride + 1 + d,
1856 stride, 8);
1857 }
1858 dequantizer = s->inter_dequant;
1859 }else{
1860 if (plane == 0)
1861 dequantizer = s->intra_y_dequant;
1862 else
1863 dequantizer = s->intra_c_dequant;
1864 }
1865
1866 /* dequantize the DCT coefficients */
1867 debug_idct("fragment %d, coding mode %d, DC = %d, dequant = %d:\n",
1868 i, s->all_fragments[i].coding_method,
1869 DC_COEFF(i), dequantizer[0]);
1870
1871 if(s->avctx->idct_algo==FF_IDCT_VP3){
1872 Coeff *coeff= s->coeffs + i;
1873 memset(block, 0, sizeof(block));
1874 while(coeff->next){
1875 block[coeff->index]= coeff->coeff * dequantizer[coeff->index];
1876 coeff= coeff->next;
1877 }
1878 }else{
1879 Coeff *coeff= s->coeffs + i;
1880 memset(block, 0, sizeof(block));
1881 while(coeff->next){
1882 block[coeff->index]= (coeff->coeff * dequantizer[coeff->index] + 2)>>2;
1883 coeff= coeff->next;
1884 }
1885 }
1886
1887 /* invert DCT and place (or add) in final output */
1888
1889 if (s->all_fragments[i].coding_method == MODE_INTRA) {
1890 if(s->avctx->idct_algo!=FF_IDCT_VP3)
1891 block[0] += 128<<3;
1892 s->dsp.idct_put(
1893 output_plane + s->all_fragments[i].first_pixel,
1894 stride,
1895 block);
1896 } else {
1897 s->dsp.idct_add(
1898 output_plane + s->all_fragments[i].first_pixel,
1899 stride,
1900 block);
1901 }
1902
1903 debug_idct("block after idct_%s():\n",
1904 (s->all_fragments[i].coding_method == MODE_INTRA)?
1905 "put" : "add");
1906 for (m = 0; m < 8; m++) {
1907 for (n = 0; n < 8; n++) {
1908 debug_idct(" %3d", *(output_plane +
1909 s->all_fragments[i].first_pixel + (m * stride + n)));
1910 }
1911 debug_idct("\n");
1912 }
1913 debug_idct("\n");
1914
1915 } else {
1916
1917 /* copy directly from the previous frame */
1918 s->dsp.put_pixels_tab[1][0](
1919 output_plane + s->all_fragments[i].first_pixel,
1920 last_plane + s->all_fragments[i].first_pixel,
1921 stride, 8);
1922
1923 }
72053728 1924#if 0
2935001c
MM
1925 /* perform the left edge filter if:
1926 * - the fragment is not on the left column
1927 * - the fragment is coded in this frame
1928 * - the fragment is not coded in this frame but the left
1929 * fragment is coded in this frame (this is done instead
1930 * of a right edge filter when rendering the left fragment
1931 * since this fragment is not available yet) */
f44b08a5 1932 if ((x > 0) &&
2935001c
MM
1933 ((s->all_fragments[i].coding_method != MODE_COPY) ||
1934 ((s->all_fragments[i].coding_method == MODE_COPY) &&
1935 (s->all_fragments[i - 1].coding_method != MODE_COPY)) )) {
f44b08a5 1936 horizontal_filter(
2935001c
MM
1937 output_plane + s->all_fragments[i].first_pixel + 7*stride,
1938 -stride, bounding_values);
f44b08a5
MM
1939 }
1940
2935001c
MM
1941 /* perform the top edge filter if:
1942 * - the fragment is not on the top row
1943 * - the fragment is coded in this frame
1944 * - the fragment is not coded in this frame but the above
1945 * fragment is coded in this frame (this is done instead
1946 * of a bottom edge filter when rendering the above
1947 * fragment since this fragment is not available yet) */
f44b08a5 1948 if ((y > 0) &&
2935001c
MM
1949 ((s->all_fragments[i].coding_method != MODE_COPY) ||
1950 ((s->all_fragments[i].coding_method == MODE_COPY) &&
1951 (s->all_fragments[i - fragment_width].coding_method != MODE_COPY)) )) {
f44b08a5 1952 vertical_filter(
2935001c
MM
1953 output_plane + s->all_fragments[i].first_pixel - stride,
1954 -stride, bounding_values);
f44b08a5 1955 }
72053728 1956#endif
dc4b78d9
MM
1957 }
1958 }
1959 }
1960
dc4b78d9
MM
1961 /* this looks like a good place for slice dispatch... */
1962 /* algorithm:
dc4b78d9 1963 * if (slice == s->macroblock_height - 1)
f44b08a5
MM
1964 * dispatch (both last slice & 2nd-to-last slice);
1965 * else if (slice > 0)
1966 * dispatch (slice - 1);
dc4b78d9
MM
1967 */
1968
1969 emms_c();
1970}
1971
a54ea19a
MM
1972static void horizontal_filter(unsigned char *first_pixel, int stride,
1973 int *bounding_values)
1974{
6f7aa589 1975 unsigned char *end;
a54ea19a
MM
1976 int filter_value;
1977
6f7aa589 1978 for (end= first_pixel + 8*stride; first_pixel < end; first_pixel += stride) {
a54ea19a 1979 filter_value =
6f7aa589
MN
1980 (first_pixel[-2] - first_pixel[ 1])
1981 +3*(first_pixel[ 0] - first_pixel[-1]);
a54ea19a 1982 filter_value = bounding_values[(filter_value + 4) >> 3];
ee408ead
MN
1983 first_pixel[-1] = clip_uint8(first_pixel[-1] + filter_value);
1984 first_pixel[ 0] = clip_uint8(first_pixel[ 0] - filter_value);
a54ea19a
MM
1985 }
1986}
1987
1988static void vertical_filter(unsigned char *first_pixel, int stride,
1989 int *bounding_values)
1990{
6f7aa589 1991 unsigned char *end;
a54ea19a 1992 int filter_value;
6f7aa589 1993 const int nstride= -stride;
a54ea19a 1994
6f7aa589 1995 for (end= first_pixel + 8; first_pixel < end; first_pixel++) {
a54ea19a 1996 filter_value =
6f7aa589
MN
1997 (first_pixel[2 * nstride] - first_pixel[ stride])
1998 +3*(first_pixel[0 ] - first_pixel[nstride]);
a54ea19a 1999 filter_value = bounding_values[(filter_value + 4) >> 3];
6f7aa589 2000 first_pixel[nstride] = clip_uint8(first_pixel[nstride] + filter_value);
ee408ead 2001 first_pixel[0] = clip_uint8(first_pixel[0] - filter_value);
a54ea19a
MM
2002 }
2003}
2004
2005static void apply_loop_filter(Vp3DecodeContext *s)
2006{
2007 int x, y, plane;
2008 int width, height;
2009 int fragment;
2010 int stride;
2011 unsigned char *plane_data;
f44b08a5 2012 int *bounding_values= s->bounding_values_array+127;
d5e18835 2013
f44b08a5 2014#if 0
d5e18835 2015 int bounding_values_array[256];
a54ea19a
MM
2016 int filter_limit;
2017
2018 /* find the right loop limit value */
2019 for (x = 63; x >= 0; x--) {
2020 if (vp31_ac_scale_factor[x] >= s->quality_index)
2021 break;
2022 }
d5e18835 2023 filter_limit = vp31_filter_limit_values[s->quality_index];
a54ea19a
MM
2024
2025 /* set up the bounding values */
d5e18835 2026 memset(bounding_values_array, 0, 256 * sizeof(int));
a54ea19a
MM
2027 for (x = 0; x < filter_limit; x++) {
2028 bounding_values[-x - filter_limit] = -filter_limit + x;
2029 bounding_values[-x] = -x;
2030 bounding_values[x] = x;
2031 bounding_values[x + filter_limit] = filter_limit - x;
2032 }
f44b08a5 2033#endif
a54ea19a
MM
2034
2035 for (plane = 0; plane < 3; plane++) {
2036
2037 if (plane == 0) {
2038 /* Y plane parameters */
2039 fragment = 0;
2040 width = s->fragment_width;
2041 height = s->fragment_height;
2042 stride = s->current_frame.linesize[0];
2043 plane_data = s->current_frame.data[0];
2044 } else if (plane == 1) {
2045 /* U plane parameters */
2046 fragment = s->u_fragment_start;
2047 width = s->fragment_width / 2;
2048 height = s->fragment_height / 2;
2049 stride = s->current_frame.linesize[1];
2050 plane_data = s->current_frame.data[1];
2051 } else {
2052 /* V plane parameters */
2053 fragment = s->v_fragment_start;
2054 width = s->fragment_width / 2;
2055 height = s->fragment_height / 2;
2056 stride = s->current_frame.linesize[2];
2057 plane_data = s->current_frame.data[2];
2058 }
2059
2060 for (y = 0; y < height; y++) {
d86053a4 2061
a54ea19a 2062 for (x = 0; x < width; x++) {
220a6f40 2063START_TIMER
a54ea19a
MM
2064 /* do not perform left edge filter for left columns frags */
2065 if ((x > 0) &&
2066 (s->all_fragments[fragment].coding_method != MODE_COPY)) {
2067 horizontal_filter(
d5e18835 2068 plane_data + s->all_fragments[fragment].first_pixel - 7*stride,
a54ea19a
MM
2069 stride, bounding_values);
2070 }
2071
2072 /* do not perform top edge filter for top row fragments */
2073 if ((y > 0) &&
2074 (s->all_fragments[fragment].coding_method != MODE_COPY)) {
2075 vertical_filter(
d5e18835 2076 plane_data + s->all_fragments[fragment].first_pixel + stride,
a54ea19a
MM
2077 stride, bounding_values);
2078 }
2079
2080 /* do not perform right edge filter for right column
2081 * fragments or if right fragment neighbor is also coded
2082 * in this frame (it will be filtered in next iteration) */
2083 if ((x < width - 1) &&
2084 (s->all_fragments[fragment].coding_method != MODE_COPY) &&
2085 (s->all_fragments[fragment + 1].coding_method == MODE_COPY)) {
2086 horizontal_filter(
d5e18835 2087 plane_data + s->all_fragments[fragment + 1].first_pixel - 7*stride,
a54ea19a
MM
2088 stride, bounding_values);
2089 }
2090
2091 /* do not perform bottom edge filter for bottom row
2092 * fragments or if bottom fragment neighbor is also coded
2093 * in this frame (it will be filtered in the next row) */
2094 if ((y < height - 1) &&
2095 (s->all_fragments[fragment].coding_method != MODE_COPY) &&
2096 (s->all_fragments[fragment + width].coding_method == MODE_COPY)) {
2097 vertical_filter(
d5e18835 2098 plane_data + s->all_fragments[fragment + width].first_pixel + stride,
a54ea19a
MM
2099 stride, bounding_values);
2100 }
2101
2102 fragment++;
220a6f40 2103STOP_TIMER("loop filter")
a54ea19a
MM
2104 }
2105 }
2106 }
d86053a4
MM
2107}
2108
2109/*
2110 * This function computes the first pixel addresses for each fragment.
2111 * This function needs to be invoked after the first frame is allocated
2112 * so that it has access to the plane strides.
2113 */
2114static void vp3_calculate_pixel_addresses(Vp3DecodeContext *s)
2115{
2116
2117 int i, x, y;
2118
2119 /* figure out the first pixel addresses for each of the fragments */
2120 /* Y plane */
2121 i = 0;
2122 for (y = s->fragment_height; y > 0; y--) {
2123 for (x = 0; x < s->fragment_width; x++) {
2124 s->all_fragments[i++].first_pixel =
2125 s->golden_frame.linesize[0] * y * FRAGMENT_PIXELS -
2126 s->golden_frame.linesize[0] +
2127 x * FRAGMENT_PIXELS;
2128 debug_init(" fragment %d, first pixel @ %d\n",
2129 i-1, s->all_fragments[i-1].first_pixel);
2130 }
2131 }
2132
2133 /* U plane */
2134 i = s->u_fragment_start;
2135 for (y = s->fragment_height / 2; y > 0; y--) {
2136 for (x = 0; x < s->fragment_width / 2; x++) {
2137 s->all_fragments[i++].first_pixel =
2138 s->golden_frame.linesize[1] * y * FRAGMENT_PIXELS -
2139 s->golden_frame.linesize[1] +
2140 x * FRAGMENT_PIXELS;
2141 debug_init(" fragment %d, first pixel @ %d\n",
2142 i-1, s->all_fragments[i-1].first_pixel);
2143 }
2144 }
2145
2146 /* V plane */
2147 i = s->v_fragment_start;
2148 for (y = s->fragment_height / 2; y > 0; y--) {
2149 for (x = 0; x < s->fragment_width / 2; x++) {
2150 s->all_fragments[i++].first_pixel =
2151 s->golden_frame.linesize[2] * y * FRAGMENT_PIXELS -
2152 s->golden_frame.linesize[2] +
2153 x * FRAGMENT_PIXELS;
2154 debug_init(" fragment %d, first pixel @ %d\n",
2155 i-1, s->all_fragments[i-1].first_pixel);
2156 }
2157 }
2158}
2159
9a7ad925
AB
2160/* FIXME: this should be merged with the above! */
2161static void theora_calculate_pixel_addresses(Vp3DecodeContext *s)
2162{
2163
2164 int i, x, y;
2165
2166 /* figure out the first pixel addresses for each of the fragments */
2167 /* Y plane */
2168 i = 0;
2169 for (y = 1; y <= s->fragment_height; y++) {
2170 for (x = 0; x < s->fragment_width; x++) {
2171 s->all_fragments[i++].first_pixel =
2172 s->golden_frame.linesize[0] * y * FRAGMENT_PIXELS -
2173 s->golden_frame.linesize[0] +
2174 x * FRAGMENT_PIXELS;
2175 debug_init(" fragment %d, first pixel @ %d\n",
2176 i-1, s->all_fragments[i-1].first_pixel);
2177 }
2178 }
2179
2180 /* U plane */
2181 i = s->u_fragment_start;
2182 for (y = 1; y <= s->fragment_height / 2; y++) {
2183 for (x = 0; x < s->fragment_width / 2; x++) {
2184 s->all_fragments[i++].first_pixel =
2185 s->golden_frame.linesize[1] * y * FRAGMENT_PIXELS -
2186 s->golden_frame.linesize[1] +
2187 x * FRAGMENT_PIXELS;
2188 debug_init(" fragment %d, first pixel @ %d\n",
2189 i-1, s->all_fragments[i-1].first_pixel);
2190 }
2191 }
2192
2193 /* V plane */
2194 i = s->v_fragment_start;
2195 for (y = 1; y <= s->fragment_height / 2; y++) {
2196 for (x = 0; x < s->fragment_width / 2; x++) {
2197 s->all_fragments[i++].first_pixel =
2198 s->golden_frame.linesize[2] * y * FRAGMENT_PIXELS -
2199 s->golden_frame.linesize[2] +
2200 x * FRAGMENT_PIXELS;
2201 debug_init(" fragment %d, first pixel @ %d\n",
2202 i-1, s->all_fragments[i-1].first_pixel);
2203 }
2204 }
2205}
2206
d86053a4
MM
2207/*
2208 * This is the ffmpeg/libavcodec API init function.
2209 */
2210static int vp3_decode_init(AVCodecContext *avctx)
2211{
2212 Vp3DecodeContext *s = avctx->priv_data;
2213 int i;
892fc83e
MM
2214 int c_width;
2215 int c_height;
2216 int y_superblock_count;
2217 int c_superblock_count;
d86053a4 2218
3c3f113e
AB
2219 if (avctx->codec_tag == MKTAG('V','P','3','0'))
2220 s->version = 0;
2221 else
2222 s->version = 1;
2223
d86053a4 2224 s->avctx = avctx;
642d7e84
MM
2225 s->width = (avctx->width + 15) & 0xFFFFFFF0;
2226 s->height = (avctx->height + 15) & 0xFFFFFFF0;
d86053a4
MM
2227 avctx->pix_fmt = PIX_FMT_YUV420P;
2228 avctx->has_b_frames = 0;
8b6103da
MN
2229 if(avctx->idct_algo==FF_IDCT_AUTO)
2230 avctx->idct_algo=FF_IDCT_VP3;
d86053a4 2231 dsputil_init(&s->dsp, avctx);
36af0c95
MN
2232
2233 ff_init_scantable(s->dsp.idct_permutation, &s->scantable, ff_zigzag_direct);
d86053a4
MM
2234
2235 /* initialize to an impossible value which will force a recalculation
2236 * in the first frame decode */
2237 s->quality_index = -1;
2238
892fc83e
MM
2239 s->y_superblock_width = (s->width + 31) / 32;
2240 s->y_superblock_height = (s->height + 31) / 32;
2241 y_superblock_count = s->y_superblock_width * s->y_superblock_height;
2242
2243 /* work out the dimensions for the C planes */
2244 c_width = s->width / 2;
2245 c_height = s->height / 2;
2246 s->c_superblock_width = (c_width + 31) / 32;
2247 s->c_superblock_height = (c_height + 31) / 32;
2248 c_superblock_count = s->c_superblock_width * s->c_superblock_height;
2249
2250 s->superblock_count = y_superblock_count + (c_superblock_count * 2);
2251 s->u_superblock_start = y_superblock_count;
2252 s->v_superblock_start = s->u_superblock_start + c_superblock_count;
d86053a4
MM
2253 s->superblock_coding = av_malloc(s->superblock_count);
2254
2255 s->macroblock_width = (s->width + 15) / 16;
2256 s->macroblock_height = (s->height + 15) / 16;
2257 s->macroblock_count = s->macroblock_width * s->macroblock_height;
2258
2259 s->fragment_width = s->width / FRAGMENT_PIXELS;
2260 s->fragment_height = s->height / FRAGMENT_PIXELS;
2261
2262 /* fragment count covers all 8x8 blocks for all 3 planes */
2263 s->fragment_count = s->fragment_width * s->fragment_height * 3 / 2;
2264 s->u_fragment_start = s->fragment_width * s->fragment_height;
2265 s->v_fragment_start = s->fragment_width * s->fragment_height * 5 / 4;
2266
892fc83e
MM
2267 debug_init(" Y plane: %d x %d\n", s->width, s->height);
2268 debug_init(" C plane: %d x %d\n", c_width, c_height);
2269 debug_init(" Y superblocks: %d x %d, %d total\n",
2270 s->y_superblock_width, s->y_superblock_height, y_superblock_count);
2271 debug_init(" C superblocks: %d x %d, %d total\n",
2272 s->c_superblock_width, s->c_superblock_height, c_superblock_count);
2273 debug_init(" total superblocks = %d, U starts @ %d, V starts @ %d\n",
2274 s->superblock_count, s->u_superblock_start, s->v_superblock_start);
d86053a4
MM
2275 debug_init(" macroblocks: %d x %d, %d total\n",
2276 s->macroblock_width, s->macroblock_height, s->macroblock_count);
2277 debug_init(" %d fragments, %d x %d, u starts @ %d, v starts @ %d\n",
2278 s->fragment_count,
2279 s->fragment_width,
2280 s->fragment_height,
2281 s->u_fragment_start,
2282 s->v_fragment_start);
2283
2284 s->all_fragments = av_malloc(s->fragment_count * sizeof(Vp3Fragment));
7beddb12 2285 s->coeffs = av_malloc(s->fragment_count * sizeof(Coeff) * 65);
d86053a4
MM
2286 s->coded_fragment_list = av_malloc(s->fragment_count * sizeof(int));
2287 s->pixel_addresses_inited = 0;
2288
f44ee2c3
AB
2289 if (!s->theora_tables)
2290 {
2291 for (i = 0; i < 64; i++)
2292 s->coded_dc_scale_factor[i] = vp31_dc_scale_factor[i];
2293 for (i = 0; i < 64; i++)
67335dbc 2294 s->coded_ac_scale_factor[i] = vp31_ac_scale_factor[i];
f44ee2c3
AB
2295 for (i = 0; i < 64; i++)
2296 s->coded_intra_y_dequant[i] = vp31_intra_y_dequant[i];
2297 for (i = 0; i < 64; i++)
2298 s->coded_intra_c_dequant[i] = vp31_intra_c_dequant[i];
2299 for (i = 0; i < 64; i++)
2300 s->coded_inter_dequant[i] = vp31_inter_dequant[i];
f44b08a5
MM
2301 for (i = 0; i < 64; i++)
2302 s->filter_limit_values[i] = vp31_filter_limit_values[i];
f44ee2c3 2303
39922395
MM
2304 /* init VLC tables */
2305 for (i = 0; i < 16; i++) {
2306
2307 /* DC histograms */
2308 init_vlc(&s->dc_vlc[i], 5, 32,
2309 &dc_bias[i][0][1], 4, 2,
2310 &dc_bias[i][0][0], 4, 2, 0);
2311
2312 /* group 1 AC histograms */
2313 init_vlc(&s->ac_vlc_1[i], 5, 32,
2314 &ac_bias_0[i][0][1], 4, 2,
2315 &ac_bias_0[i][0][0], 4, 2, 0);
2316
2317 /* group 2 AC histograms */
2318 init_vlc(&s->ac_vlc_2[i], 5, 32,
2319 &ac_bias_1[i][0][1], 4, 2,
2320 &ac_bias_1[i][0][0], 4, 2, 0);
2321
2322 /* group 3 AC histograms */
2323 init_vlc(&s->ac_vlc_3[i], 5, 32,
2324 &ac_bias_2[i][0][1], 4, 2,
2325 &ac_bias_2[i][0][0], 4, 2, 0);
2326
2327 /* group 4 AC histograms */
2328 init_vlc(&s->ac_vlc_4[i], 5, 32,
2329 &ac_bias_3[i][0][1], 4, 2,
2330 &ac_bias_3[i][0][0], 4, 2, 0);
2331 }
2332 } else {
2333 for (i = 0; i < 16; i++) {
2334
2335 /* DC histograms */
2336 init_vlc(&s->dc_vlc[i], 5, 32,
2337 &s->huffman_table[i][0][1], 4, 2,
2338 &s->huffman_table[i][0][0], 4, 2, 0);
2339
2340 /* group 1 AC histograms */
2341 init_vlc(&s->ac_vlc_1[i], 5, 32,
2342 &s->huffman_table[i+16][0][1], 4, 2,
2343 &s->huffman_table[i+16][0][0], 4, 2, 0);
2344
2345 /* group 2 AC histograms */
2346 init_vlc(&s->ac_vlc_2[i], 5, 32,
2347 &s->huffman_table[i+16*2][0][1], 4, 2,
2348 &s->huffman_table[i+16*2][0][0], 4, 2, 0);
2349
2350 /* group 3 AC histograms */
2351 init_vlc(&s->ac_vlc_3[i], 5, 32,
2352 &s->huffman_table[i+16*3][0][1], 4, 2,
2353 &s->huffman_table[i+16*3][0][0], 4, 2, 0);
2354
2355 /* group 4 AC histograms */
2356 init_vlc(&s->ac_vlc_4[i], 5, 32,
2357 &s->huffman_table[i+16*4][0][1], 4, 2,
2358 &s->huffman_table[i+16*4][0][0], 4, 2, 0);
2359 }
d86053a4
MM
2360 }
2361
d8278bab
MM
2362 init_vlc(&s->superblock_run_length_vlc, 6, 34,
2363 &superblock_run_length_vlc_table[0][1], 4, 2,
2364 &superblock_run_length_vlc_table[0][0], 4, 2, 0);
2365
dd36b667 2366 init_vlc(&s->fragment_run_length_vlc, 5, 30,
0ad72bdd
MM
2367 &fragment_run_length_vlc_table[0][1], 4, 2,
2368 &fragment_run_length_vlc_table[0][0], 4, 2, 0);
2369
2370 init_vlc(&s->mode_code_vlc, 3, 8,
2371 &mode_code_vlc_table[0][1], 2, 1,
2372 &mode_code_vlc_table[0][0], 2, 1, 0);
2373
2374 init_vlc(&s->motion_vector_vlc, 6, 63,
2375 &motion_vector_vlc_table[0][1], 2, 1,
2376 &motion_vector_vlc_table[0][0], 2, 1, 0);
2377
d86053a4
MM
2378 /* work out the block mapping tables */
2379 s->superblock_fragments = av_malloc(s->superblock_count * 16 * sizeof(int));
2380 s->superblock_macroblocks = av_malloc(s->superblock_count * 4 * sizeof(int));
2381 s->macroblock_fragments = av_malloc(s->macroblock_count * 6 * sizeof(int));
96a7e73b 2382 s->macroblock_coding = av_malloc(s->macroblock_count + 1);
d86053a4
MM
2383 init_block_mapping(s);
2384
44ae98dd
MM
2385 for (i = 0; i < 3; i++) {
2386 s->current_frame.data[i] = NULL;
2387 s->last_frame.data[i] = NULL;
2388 s->golden_frame.data[i] = NULL;
61873c4a
MM
2389 }
2390
d86053a4
MM
2391 return 0;
2392}
2393
2394/*
2395 * This is the ffmpeg/libavcodec API frame decode function.
2396 */
2397static int vp3_decode_frame(AVCodecContext *avctx,
2398 void *data, int *data_size,
2399 uint8_t *buf, int buf_size)
2400{
2401 Vp3DecodeContext *s = avctx->priv_data;
2402 GetBitContext gb;
2403 static int counter = 0;
dc4b78d9 2404 int i;
d86053a4 2405
d86053a4 2406 init_get_bits(&gb, buf, buf_size * 8);
f44ee2c3
AB
2407
2408 if (s->theora && get_bits1(&gb))
2409 {
7146d2c2
AB
2410#if 1
2411 av_log(avctx, AV_LOG_ERROR, "Header packet passed to frame decoder, skipping\n");
2412 return -1;
2413#else
2414 int ptype = get_bits(&gb, 7);
d86053a4 2415
3c3f113e
AB
2416 skip_bits(&gb, 6*8); /* "theora" */
2417
2418 switch(ptype)
9a7ad925 2419 {
3c3f113e
AB
2420 case 1:
2421 theora_decode_comments(avctx, gb);
2422 break;
2423 case 2:
2424 theora_decode_tables(avctx, gb);
2425 init_dequantizer(s);
2426 break;
2427 default:
2428 av_log(avctx, AV_LOG_ERROR, "Unknown Theora config packet: %d\n", ptype);
9a7ad925 2429 }
3c3f113e 2430 return buf_size;
7146d2c2 2431#endif
f44ee2c3 2432 }
3c3f113e
AB
2433
2434 s->keyframe = !get_bits1(&gb);
2435 if (!s->theora)
f44ee2c3 2436 skip_bits(&gb, 1);
3c3f113e
AB
2437 s->last_quality_index = s->quality_index;
2438 s->quality_index = get_bits(&gb, 6);
ba7ee4a4 2439 if (s->theora >= 0x030200)
3c3f113e 2440 skip_bits1(&gb);
d86053a4 2441
f8830383
AB
2442 if (s->avctx->debug & FF_DEBUG_PICT_INFO)
2443 av_log(s->avctx, AV_LOG_INFO, " VP3 %sframe #%d: Q index = %d\n",
2444 s->keyframe?"key":"", counter, s->quality_index);
d86053a4
MM
2445 counter++;
2446
f44b08a5 2447 if (s->quality_index != s->last_quality_index) {
642d7e84 2448 init_dequantizer(s);
f44b08a5
MM
2449 init_loop_filter(s);
2450 }
642d7e84 2451
d86053a4 2452 if (s->keyframe) {
3c3f113e
AB
2453 if (!s->theora)
2454 {
2455 skip_bits(&gb, 4); /* width code */
2456 skip_bits(&gb, 4); /* height code */
2457 if (s->version)
2458 {
2459 s->version = get_bits(&gb, 5);
2460 if (counter == 1)
2461 av_log(s->avctx, AV_LOG_DEBUG, "VP version: %d\n", s->version);
2462 }
2463 }
2464 if (s->version || s->theora)
2465 {
2466 if (get_bits1(&gb))
2467 av_log(s->avctx, AV_LOG_ERROR, "Warning, unsupported keyframe coding type?!\n");
2468 skip_bits(&gb, 2); /* reserved? */
2469 }
2470
74c0ac12
MM
2471 if (s->last_frame.data[0] == s->golden_frame.data[0]) {
2472 if (s->golden_frame.data[0])
2473 avctx->release_buffer(avctx, &s->golden_frame);
8e39d4a7 2474 s->last_frame= s->golden_frame; /* ensure that we catch any access to this released frame */
74c0ac12
MM
2475 } else {
2476 if (s->golden_frame.data[0])
2477 avctx->release_buffer(avctx, &s->golden_frame);
2478 if (s->last_frame.data[0])
2479 avctx->release_buffer(avctx, &s->last_frame);
2480 }
d86053a4 2481
8e39d4a7 2482 s->golden_frame.reference = 3;
d86053a4 2483 if(avctx->get_buffer(avctx, &s->golden_frame) < 0) {
9b879566 2484 av_log(s->avctx, AV_LOG_ERROR, "vp3: get_buffer() failed\n");
d86053a4
MM
2485 return -1;
2486 }
2487
d86053a4 2488 /* golden frame is also the current frame */
61873c4a 2489 memcpy(&s->current_frame, &s->golden_frame, sizeof(AVFrame));
d86053a4
MM
2490
2491 /* time to figure out pixel addresses? */
2492 if (!s->pixel_addresses_inited)
9a7ad925
AB
2493 {
2494 if (!s->flipped_image)
2495 vp3_calculate_pixel_addresses(s);
2496 else
2497 theora_calculate_pixel_addresses(s);
2498 }
d86053a4 2499 } else {
d86053a4 2500 /* allocate a new current frame */
8e39d4a7 2501 s->current_frame.reference = 3;
d86053a4 2502 if(avctx->get_buffer(avctx, &s->current_frame) < 0) {
9b879566 2503 av_log(s->avctx, AV_LOG_ERROR, "vp3: get_buffer() failed\n");
d86053a4
MM
2504 return -1;
2505 }
d86053a4
MM
2506 }
2507
b928ec64
MN
2508 s->current_frame.qscale_table= s->qscale_table; //FIXME allocate individual tables per AVFrame
2509 s->current_frame.qstride= 0;
2510
220a6f40 2511 {START_TIMER
d86053a4 2512 init_frame(s, &gb);
220a6f40 2513 STOP_TIMER("init_frame")}
d86053a4 2514
892fc83e
MM
2515#if KEYFRAMES_ONLY
2516if (!s->keyframe) {
2517
2518 memcpy(s->current_frame.data[0], s->golden_frame.data[0],
2519 s->current_frame.linesize[0] * s->height);
2520 memcpy(s->current_frame.data[1], s->golden_frame.data[1],
2521 s->current_frame.linesize[1] * s->height / 2);
2522 memcpy(s->current_frame.data[2], s->golden_frame.data[2],
2523 s->current_frame.linesize[2] * s->height / 2);
2524
2525} else {
2526#endif
2527
220a6f40
MN
2528 {START_TIMER
2529 if (unpack_superblocks(s, &gb)){
2530 av_log(s->avctx, AV_LOG_ERROR, "error in unpack_superblocks\n");
2531 return -1;
2532 }
2533 STOP_TIMER("unpack_superblocks")}
2534 {START_TIMER
2535 if (unpack_modes(s, &gb)){
2536 av_log(s->avctx, AV_LOG_ERROR, "error in unpack_modes\n");
2537 return -1;
2538 }
2539 STOP_TIMER("unpack_modes")}
2540 {START_TIMER
2541 if (unpack_vectors(s, &gb)){
2542 av_log(s->avctx, AV_LOG_ERROR, "error in unpack_vectors\n");
2543 return -1;
2544 }
2545 STOP_TIMER("unpack_vectors")}
2546 {START_TIMER
2547 if (unpack_dct_coeffs(s, &gb)){
2548 av_log(s->avctx, AV_LOG_ERROR, "error in unpack_dct_coeffs\n");
892fc83e
MM
2549 return -1;
2550 }
220a6f40
MN
2551 STOP_TIMER("unpack_dct_coeffs")}
2552 {START_TIMER
d86053a4
MM
2553
2554 reverse_dc_prediction(s, 0, s->fragment_width, s->fragment_height);
3d32b429
MM
2555 if ((avctx->flags & CODEC_FLAG_GRAY) == 0) {
2556 reverse_dc_prediction(s, s->u_fragment_start,
2557 s->fragment_width / 2, s->fragment_height / 2);
2558 reverse_dc_prediction(s, s->v_fragment_start,
2559 s->fragment_width / 2, s->fragment_height / 2);
dc4b78d9
MM
2560 }
2561 STOP_TIMER("reverse_dc_prediction")}
2562 {START_TIMER
2563
dc4b78d9
MM
2564 for (i = 0; i < s->macroblock_height; i++)
2565 render_slice(s, i);
dc4b78d9 2566 STOP_TIMER("render_fragments")}
d86053a4 2567
220a6f40 2568 {START_TIMER
72053728 2569 apply_loop_filter(s);
220a6f40 2570 STOP_TIMER("apply_loop_filter")}
892fc83e
MM
2571#if KEYFRAMES_ONLY
2572}
2573#endif
2574
d86053a4
MM
2575 *data_size=sizeof(AVFrame);
2576 *(AVFrame*)data= s->current_frame;
2577
44ae98dd
MM
2578 /* release the last frame, if it is allocated and if it is not the
2579 * golden frame */
2580 if ((s->last_frame.data[0]) &&
2581 (s->last_frame.data[0] != s->golden_frame.data[0]))
2582 avctx->release_buffer(avctx, &s->last_frame);
d86053a4 2583
61873c4a
MM
2584 /* shuffle frames (last = current) */
2585 memcpy(&s->last_frame, &s->current_frame, sizeof(AVFrame));
8e39d4a7 2586 s->current_frame.data[0]= NULL; /* ensure that we catch any access to this released frame */
d86053a4
MM
2587
2588 return buf_size;
2589}
2590
2591/*
2592 * This is the ffmpeg/libavcodec API module cleanup function.
2593 */
2594static int vp3_decode_end(AVCodecContext *avctx)
2595{
2596 Vp3DecodeContext *s = avctx->priv_data;
2597
2598 av_free(s->all_fragments);
a2df5a50 2599 av_free(s->coeffs);
d86053a4
MM
2600 av_free(s->coded_fragment_list);
2601 av_free(s->superblock_fragments);
2602 av_free(s->superblock_macroblocks);
2603 av_free(s->macroblock_fragments);
96a7e73b 2604 av_free(s->macroblock_coding);
8e39d4a7 2605
d86053a4 2606 /* release all frames */
8e39d4a7 2607 if (s->golden_frame.data[0] && s->golden_frame.data[0] != s->last_frame.data[0])
892fc83e
MM
2608 avctx->release_buffer(avctx, &s->golden_frame);
2609 if (s->last_frame.data[0])
2610 avctx->release_buffer(avctx, &s->last_frame);
2611 /* no need to release the current_frame since it will always be pointing
2612 * to the same frame as either the golden or last frame */
d86053a4
MM
2613
2614 return 0;
2615}
2616
39922395
MM
2617static int read_huffman_tree(AVCodecContext *avctx, GetBitContext *gb)
2618{
2619 Vp3DecodeContext *s = avctx->priv_data;
2620
2621 if (get_bits(gb, 1)) {
2622 int token;
2623 if (s->entries >= 32) { /* overflow */
2624 av_log(avctx, AV_LOG_ERROR, "huffman tree overflow\n");
2625 return -1;
2626 }
2627 token = get_bits(gb, 5);
2628 //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);
2629 s->huffman_table[s->hti][token][0] = s->hbits;
2630 s->huffman_table[s->hti][token][1] = s->huff_code_size;
2631 s->entries++;
2632 }
2633 else {
2634 if (s->huff_code_size >= 32) {/* overflow */
2635 av_log(avctx, AV_LOG_ERROR, "huffman tree overflow\n");
2636 return -1;
2637 }
2638 s->huff_code_size++;
2639 s->hbits <<= 1;
2640 read_huffman_tree(avctx, gb);
2641 s->hbits |= 1;
2642 read_huffman_tree(avctx, gb);
2643 s->hbits >>= 1;
2644 s->huff_code_size--;
2645 }
2646 return 0;
2647}
2648
f44ee2c3
AB
2649static int theora_decode_header(AVCodecContext *avctx, GetBitContext gb)
2650{
2651 Vp3DecodeContext *s = avctx->priv_data;
9a7ad925
AB
2652 int major, minor, micro;
2653
2654 major = get_bits(&gb, 8); /* version major */
2655 minor = get_bits(&gb, 8); /* version minor */
2656 micro = get_bits(&gb, 8); /* version micro */
2657 av_log(avctx, AV_LOG_INFO, "Theora bitstream version %d.%d.%d\n",
2658 major, minor, micro);
2659
105c3d25
AB
2660 /* FIXME: endianess? */
2661 s->theora = (major << 16) | (minor << 8) | micro;
2662
ba7ee4a4 2663 /* 3.2.0 aka alpha3 has the same frame orientation as original vp3 */
9a7ad925 2664 /* but previous versions have the image flipped relative to vp3 */
ba7ee4a4 2665 if (s->theora < 0x030200)
9a7ad925
AB
2666 {
2667 s->flipped_image = 1;
2668 av_log(avctx, AV_LOG_DEBUG, "Old (<alpha3) Theora bitstream, flipped image\n");
2669 }
f44ee2c3 2670
f44ee2c3
AB
2671 s->width = get_bits(&gb, 16) << 4;
2672 s->height = get_bits(&gb, 16) << 4;
2673
0ecca7a4 2674 if(avcodec_check_dimensions(avctx, s->width, s->height)){
7146d2c2 2675 av_log(avctx, AV_LOG_ERROR, "Invalid dimensions (%dx%d)\n", s->width, s->height);
0ecca7a4
MN
2676 s->width= s->height= 0;
2677 return -1;
2678 }
7146d2c2
AB
2679
2680 if (s->theora >= 0x030400)
2681 {
2682 skip_bits(&gb, 32); /* total number of superblocks in a frame */
2683 // fixme, the next field is 36bits long
2684 skip_bits(&gb, 32); /* total number of blocks in a frame */
2685 skip_bits(&gb, 4); /* total number of blocks in a frame */
2686 skip_bits(&gb, 32); /* total number of macroblocks in a frame */
2687
2688 skip_bits(&gb, 24); /* frame width */
2689 skip_bits(&gb, 24); /* frame height */
2690 }
2691 else
2692 {
2693 skip_bits(&gb, 24); /* frame width */
2694 skip_bits(&gb, 24); /* frame height */
2695 }
f44ee2c3
AB
2696
2697 skip_bits(&gb, 8); /* offset x */
2698 skip_bits(&gb, 8); /* offset y */
2699
2700 skip_bits(&gb, 32); /* fps numerator */
2701 skip_bits(&gb, 32); /* fps denumerator */
2702 skip_bits(&gb, 24); /* aspect numerator */
2703 skip_bits(&gb, 24); /* aspect denumerator */
2704
ba7ee4a4 2705 if (s->theora < 0x030200)
105c3d25 2706 skip_bits(&gb, 5); /* keyframe frequency force */
f44ee2c3 2707 skip_bits(&gb, 8); /* colorspace */
7146d2c2
AB
2708 if (s->theora >= 0x030400)
2709 skip_bits(&gb, 2); /* pixel format: 420,res,422,444 */
f44ee2c3
AB
2710 skip_bits(&gb, 24); /* bitrate */
2711
7146d2c2 2712 skip_bits(&gb, 6); /* quality hint */
f44ee2c3 2713
ba7ee4a4 2714 if (s->theora >= 0x030200)
105c3d25
AB
2715 {
2716 skip_bits(&gb, 5); /* keyframe frequency force */
7146d2c2
AB
2717
2718 if (s->theora < 0x030400)
2719 skip_bits(&gb, 5); /* spare bits */
105c3d25
AB
2720 }
2721
f44ee2c3
AB
2722// align_get_bits(&gb);
2723
2724 avctx->width = s->width;
2725 avctx->height = s->height;
2726
f44ee2c3
AB
2727 return 0;
2728}
2729
7146d2c2 2730static inline int theora_get_32bit(GetBitContext gb)
91381201 2731{
7146d2c2
AB
2732 int ret = get_bits(&gb, 8);
2733 ret += get_bits(&gb, 8) << 8;
2734 ret += get_bits(&gb, 8) << 16;
2735 ret += get_bits(&gb, 8) << 24;
2736
2737 return ret;
2738}
91381201 2739
7146d2c2
AB
2740static int theora_decode_comments(AVCodecContext *avctx, GetBitContext gb)
2741{
2742 Vp3DecodeContext *s = avctx->priv_data;
2743 int len;
91381201 2744
7146d2c2 2745 if (s->theora <= 0x030200)
91381201 2746 {
7146d2c2
AB
2747 int i, comments;
2748
2749 // vendor string
2750 len = get_bits_long(&gb, 32);
2751 len = le2me_32(len);
2752 while(len--)
91381201 2753 skip_bits(&gb, 8);
7146d2c2
AB
2754
2755 // user comments
2756 comments = get_bits_long(&gb, 32);
2757 comments = le2me_32(comments);
2758 for (i = 0; i < comments; i++)
2759 {
2760 len = get_bits_long(&gb, 32);
2761 len = be2me_32(len);
2762 while(len--)
2763 skip_bits(&gb, 8);
2764 }
91381201 2765 }
7146d2c2
AB
2766 else
2767 {
2768 do {
2769 len = get_bits_long(&gb, 32);
2770 len = le2me_32(len);
2771 if (len <= 0)
2772 break;
2773 while (len--)
2774 skip_bits(&gb, 8);
2775 } while (1);
2776 }
91381201
AB
2777 return 0;
2778}
2779
f44ee2c3
AB
2780static int theora_decode_tables(AVCodecContext *avctx, GetBitContext gb)
2781{
2782 Vp3DecodeContext *s = avctx->priv_data;
2da2ba03 2783 int i, n, matrices;
ba7ee4a4
MC
2784
2785 if (s->theora >= 0x030200) {
2786 n = get_bits(&gb, 3);
9c7154c7 2787 /* loop filter limit values table */
ba7ee4a4 2788 for (i = 0; i < 64; i++)
9c7154c7 2789 s->filter_limit_values[i] = get_bits(&gb, n);
ba7ee4a4 2790 }
f44ee2c3 2791
ba7ee4a4
MC
2792 if (s->theora >= 0x030200)
2793 n = get_bits(&gb, 4) + 1;
2794 else
2795 n = 16;
f44ee2c3
AB
2796 /* quality threshold table */
2797 for (i = 0; i < 64; i++)
ba7ee4a4 2798 s->coded_ac_scale_factor[i] = get_bits(&gb, n);
f44ee2c3 2799
ba7ee4a4
MC
2800 if (s->theora >= 0x030200)
2801 n = get_bits(&gb, 4) + 1;
2802 else
2803 n = 16;
f44ee2c3
AB
2804 /* dc scale factor table */
2805 for (i = 0; i < 64; i++)
ba7ee4a4 2806 s->coded_dc_scale_factor[i] = get_bits(&gb, n);
f44ee2c3 2807
ba7ee4a4 2808 if (s->theora >= 0x030200)
2da2ba03 2809 matrices = get_bits(&gb, 9) + 1;
ba7ee4a4 2810 else
2da2ba03
MC
2811 matrices = 3;
2812 if (matrices != 3) {
2813 av_log(avctx,AV_LOG_ERROR, "unsupported matrices: %d\n", matrices);
2814// return -1;
ba7ee4a4 2815 }
f44ee2c3
AB
2816 /* y coeffs */
2817 for (i = 0; i < 64; i++)
2818 s->coded_intra_y_dequant[i] = get_bits(&gb, 8);
2819
2820 /* uv coeffs */
2821 for (i = 0; i < 64; i++)
2822 s->coded_intra_c_dequant[i] = get_bits(&gb, 8);
2823
2824 /* inter coeffs */
2825 for (i = 0; i < 64; i++)
2826 s->coded_inter_dequant[i] = get_bits(&gb, 8);
3c3f113e 2827
2da2ba03
MC
2828 /* skip unknown matrices */
2829 n = matrices - 3;
2830 while(n--)
2831 for (i = 0; i < 64; i++)
2832 skip_bits(&gb, 8);
2833
39922395
MM
2834 for (i = 0; i <= 1; i++) {
2835 for (n = 0; n <= 2; n++) {
2836 int newqr;
2837 if (i > 0 || n > 0)
2838 newqr = get_bits(&gb, 1);
2839 else
2840 newqr = 1;
2841 if (!newqr) {
2842 if (i > 0)
2843 get_bits(&gb, 1);
2844 }
2845 else {
2846 int qi = 0;
2da2ba03 2847 skip_bits(&gb, av_log2(matrices-1)+1);
39922395
MM
2848 while (qi < 63) {
2849 qi += get_bits(&gb, av_log2(63-qi)+1) + 1;
2da2ba03 2850 skip_bits(&gb, av_log2(matrices-1)+1);
39922395 2851 }
2da2ba03 2852 if (qi > 63) {
7146d2c2 2853 av_log(avctx, AV_LOG_ERROR, "invalid qi %d > 63\n", qi);
2da2ba03
MC
2854 return -1;
2855 }
39922395
MM
2856 }
2857 }
2858 }
2859
2da2ba03 2860 /* Huffman tables */
39922395
MM
2861 for (s->hti = 0; s->hti < 80; s->hti++) {
2862 s->entries = 0;
2863 s->huff_code_size = 1;
2864 if (!get_bits(&gb, 1)) {
2865 s->hbits = 0;
2866 read_huffman_tree(avctx, &gb);
2867 s->hbits = 1;
2868 read_huffman_tree(avctx, &gb);
2869 }
2870 }
f44ee2c3
AB
2871
2872 s->theora_tables = 1;
2873
2874 return 0;
2875}
2876
2877static int theora_decode_init(AVCodecContext *avctx)
2878{
2879 Vp3DecodeContext *s = avctx->priv_data;
2880 GetBitContext gb;
2881 int ptype;
ee89b2b9
MN
2882 uint8_t *p= avctx->extradata;
2883 int op_bytes, i;
f44ee2c3
AB
2884
2885 s->theora = 1;
2886
2887 if (!avctx->extradata_size)
7146d2c2
AB
2888 {
2889 av_log(avctx, AV_LOG_ERROR, "Missing extradata!\n");
f44ee2c3 2890 return -1;
7146d2c2 2891 }
f44ee2c3 2892
ee89b2b9
MN
2893 for(i=0;i<3;i++) {
2894 op_bytes = *(p++)<<8;
2895 op_bytes += *(p++);
2896
2897 init_get_bits(&gb, p, op_bytes);
2898 p += op_bytes;
f44ee2c3
AB
2899
2900 ptype = get_bits(&gb, 8);
2901 debug_vp3("Theora headerpacket type: %x\n", ptype);
2902
7146d2c2
AB
2903 if (!(ptype & 0x80))
2904 {
2905 av_log(avctx, AV_LOG_ERROR, "Invalid extradata!\n");
f44ee2c3 2906 return -1;
7146d2c2
AB
2907 }
2908
2909 // FIXME: check for this aswell
f44ee2c3
AB
2910 skip_bits(&gb, 6*8); /* "theora" */
2911
2912 switch(ptype)
2913 {
2914 case 0x80:
2915 theora_decode_header(avctx, gb);
f44ee2c3
AB
2916 break;
2917 case 0x81:
2da2ba03
MC
2918// FIXME: is this needed? it breaks sometimes
2919// theora_decode_comments(avctx, gb);
f44ee2c3
AB
2920 break;
2921 case 0x82:
2922 theora_decode_tables(avctx, gb);
2923 break;
7146d2c2
AB
2924 default:
2925 av_log(avctx, AV_LOG_ERROR, "Unknown Theora config packet: %d\n", ptype&~0x80);
2926 break;
f44ee2c3 2927 }
ee89b2b9 2928 }
f44ee2c3 2929
ba7ee4a4 2930 vp3_decode_init(avctx);
f44ee2c3
AB
2931 return 0;
2932}
2933
d86053a4
MM
2934AVCodec vp3_decoder = {
2935 "vp3",
2936 CODEC_TYPE_VIDEO,
2937 CODEC_ID_VP3,
2938 sizeof(Vp3DecodeContext),
2939 vp3_decode_init,
2940 NULL,
2941 vp3_decode_end,
2942 vp3_decode_frame,
2943 0,
2944 NULL
2945};
f44ee2c3 2946
aac064b5 2947#ifndef CONFIG_LIBTHEORA
f44ee2c3
AB
2948AVCodec theora_decoder = {
2949 "theora",
2950 CODEC_TYPE_VIDEO,
2951 CODEC_ID_THEORA,
2952 sizeof(Vp3DecodeContext),
2953 theora_decode_init,
2954 NULL,
2955 vp3_decode_end,
2956 vp3_decode_frame,
2957 0,
2958 NULL
2959};
aac064b5 2960#endif