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Fixed initialisation of tf in file_open(). Without setting the memory to 0,
[cinelerra_cv/mob.git] / quicktime / ffmpeg / libavcodec / asv1.c
blobe07880e4f6fcf92a093c7a65773d952f48eb0764
1 /*
2 * ASUS V1/V2 codec
3 * Copyright (c) 2003 Michael Niedermayer
4 *
5 * This library is free software; you can redistribute it and/or
6 * modify it under the terms of the GNU Lesser General Public
7 * License as published by the Free Software Foundation; either
8 * version 2 of the License, or (at your option) any later version.
9 *
10 * This library is distributed in the hope that it will be useful,
11 * but WITHOUT ANY WARRANTY; without even the implied warranty of
12 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
13 * Lesser General Public License for more details.
14 *
15 * You should have received a copy of the GNU Lesser General Public
16 * License along with this library; if not, write to the Free Software
17 * Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
18 */
19
20 /**
21 * @file asv1.c
22 * ASUS V1/V2 codec.
23 */
24
25 #include "avcodec.h"
26 #include "dsputil.h"
27 #include "mpegvideo.h"
28
29 //#undef NDEBUG
30 //#include <assert.h>
31
32 #define VLC_BITS 6
33 #define ASV2_LEVEL_VLC_BITS 10
34
35 typedef struct ASV1Context{
36 AVCodecContext *avctx;
37 DSPContext dsp;
38 AVFrame picture;
39 PutBitContext pb;
40 GetBitContext gb;
41 ScanTable scantable;
42 int inv_qscale;
43 int mb_width;
44 int mb_height;
45 int mb_width2;
46 int mb_height2;
47 DCTELEM __align8 block[6][64];
48 uint16_t __align8 intra_matrix[64];
49 int __align8 q_intra_matrix[64];
50 uint8_t *bitstream_buffer;
51 int bitstream_buffer_size;
52 } ASV1Context;
53
54 static const uint8_t scantab[64]={
55 0x00,0x08,0x01,0x09,0x10,0x18,0x11,0x19,
56 0x02,0x0A,0x03,0x0B,0x12,0x1A,0x13,0x1B,
57 0x04,0x0C,0x05,0x0D,0x20,0x28,0x21,0x29,
58 0x06,0x0E,0x07,0x0F,0x14,0x1C,0x15,0x1D,
59 0x22,0x2A,0x23,0x2B,0x30,0x38,0x31,0x39,
60 0x16,0x1E,0x17,0x1F,0x24,0x2C,0x25,0x2D,
61 0x32,0x3A,0x33,0x3B,0x26,0x2E,0x27,0x2F,
62 0x34,0x3C,0x35,0x3D,0x36,0x3E,0x37,0x3F,
63 };
64
65
66 static const uint8_t ccp_tab[17][2]={
67 {0x2,2}, {0x7,5}, {0xB,5}, {0x3,5},
68 {0xD,5}, {0x5,5}, {0x9,5}, {0x1,5},
69 {0xE,5}, {0x6,5}, {0xA,5}, {0x2,5},
70 {0xC,5}, {0x4,5}, {0x8,5}, {0x3,2},
71 {0xF,5}, //EOB
72 };
73
74 static const uint8_t level_tab[7][2]={
75 {3,4}, {3,3}, {3,2}, {0,3}, {2,2}, {2,3}, {2,4}
76 };
77
78 static const uint8_t dc_ccp_tab[8][2]={
79 {0x1,2}, {0xD,4}, {0xF,4}, {0xC,4},
80 {0x5,3}, {0xE,4}, {0x4,3}, {0x0,2},
81 };
82
83 static const uint8_t ac_ccp_tab[16][2]={
84 {0x00,2}, {0x3B,6}, {0x0A,4}, {0x3A,6},
85 {0x02,3}, {0x39,6}, {0x3C,6}, {0x38,6},
86 {0x03,3}, {0x3D,6}, {0x08,4}, {0x1F,5},
87 {0x09,4}, {0x0B,4}, {0x0D,4}, {0x0C,4},
88 };
89
90 static const uint8_t asv2_level_tab[63][2]={
91 {0x3F,10},{0x2F,10},{0x37,10},{0x27,10},{0x3B,10},{0x2B,10},{0x33,10},{0x23,10},
92 {0x3D,10},{0x2D,10},{0x35,10},{0x25,10},{0x39,10},{0x29,10},{0x31,10},{0x21,10},
93 {0x1F, 8},{0x17, 8},{0x1B, 8},{0x13, 8},{0x1D, 8},{0x15, 8},{0x19, 8},{0x11, 8},
94 {0x0F, 6},{0x0B, 6},{0x0D, 6},{0x09, 6},
95 {0x07, 4},{0x05, 4},
96 {0x03, 2},
97 {0x00, 5},
98 {0x02, 2},
99 {0x04, 4},{0x06, 4},
100 {0x08, 6},{0x0C, 6},{0x0A, 6},{0x0E, 6},
101 {0x10, 8},{0x18, 8},{0x14, 8},{0x1C, 8},{0x12, 8},{0x1A, 8},{0x16, 8},{0x1E, 8},
102 {0x20,10},{0x30,10},{0x28,10},{0x38,10},{0x24,10},{0x34,10},{0x2C,10},{0x3C,10},
103 {0x22,10},{0x32,10},{0x2A,10},{0x3A,10},{0x26,10},{0x36,10},{0x2E,10},{0x3E,10},
104 };
105
106
107 static VLC ccp_vlc;
108 static VLC level_vlc;
109 static VLC dc_ccp_vlc;
110 static VLC ac_ccp_vlc;
111 static VLC asv2_level_vlc;
112
113 static void init_vlcs(ASV1Context *a){
114 static int done = 0;
115
116 if (!done) {
117 done = 1;
118
119 init_vlc(&ccp_vlc, VLC_BITS, 17,
120 &ccp_tab[0][1], 2, 1,
121 &ccp_tab[0][0], 2, 1, 1);
122 init_vlc(&dc_ccp_vlc, VLC_BITS, 8,
123 &dc_ccp_tab[0][1], 2, 1,
124 &dc_ccp_tab[0][0], 2, 1, 1);
125 init_vlc(&ac_ccp_vlc, VLC_BITS, 16,
126 &ac_ccp_tab[0][1], 2, 1,
127 &ac_ccp_tab[0][0], 2, 1, 1);
128 init_vlc(&level_vlc, VLC_BITS, 7,
129 &level_tab[0][1], 2, 1,
130 &level_tab[0][0], 2, 1, 1);
131 init_vlc(&asv2_level_vlc, ASV2_LEVEL_VLC_BITS, 63,
132 &asv2_level_tab[0][1], 2, 1,
133 &asv2_level_tab[0][0], 2, 1, 1);
134 }
135 }
136
137 //FIXME write a reversed bitstream reader to avoid the double reverse
138 static inline int asv2_get_bits(GetBitContext *gb, int n){
139 return ff_reverse[ get_bits(gb, n) << (8-n) ];
140 }
141
142 static inline void asv2_put_bits(PutBitContext *pb, int n, int v){
143 put_bits(pb, n, ff_reverse[ v << (8-n) ]);
144 }
145
146 static inline int asv1_get_level(GetBitContext *gb){
147 int code= get_vlc2(gb, level_vlc.table, VLC_BITS, 1);
148
149 if(code==3) return get_sbits(gb, 8);
150 else return code - 3;
151 }
152
153 static inline int asv2_get_level(GetBitContext *gb){
154 int code= get_vlc2(gb, asv2_level_vlc.table, ASV2_LEVEL_VLC_BITS, 1);
155
156 if(code==31) return (int8_t)asv2_get_bits(gb, 8);
157 else return code - 31;
158 }
159
160 static inline void asv1_put_level(PutBitContext *pb, int level){
161 unsigned int index= level + 3;
162
163 if(index <= 6) put_bits(pb, level_tab[index][1], level_tab[index][0]);
164 else{
165 put_bits(pb, level_tab[3][1], level_tab[3][0]);
166 put_bits(pb, 8, level&0xFF);
167 }
168 }
169
170 static inline void asv2_put_level(PutBitContext *pb, int level){
171 unsigned int index= level + 31;
172
173 if(index <= 62) put_bits(pb, asv2_level_tab[index][1], asv2_level_tab[index][0]);
174 else{
175 put_bits(pb, asv2_level_tab[31][1], asv2_level_tab[31][0]);
176 asv2_put_bits(pb, 8, level&0xFF);
177 }
178 }
179
180 static inline int asv1_decode_block(ASV1Context *a, DCTELEM block[64]){
181 int i;
182
183 block[0]= 8*get_bits(&a->gb, 8);
184
185 for(i=0; i<11; i++){
186 const int ccp= get_vlc2(&a->gb, ccp_vlc.table, VLC_BITS, 1);
187
188 if(ccp){
189 if(ccp == 16) break;
190 if(ccp < 0 || i>=10){
191 av_log(a->avctx, AV_LOG_ERROR, "coded coeff pattern damaged\n");
192 return -1;
193 }
194
195 if(ccp&8) block[a->scantable.permutated[4*i+0]]= (asv1_get_level(&a->gb) * a->intra_matrix[4*i+0])>>4;
196 if(ccp&4) block[a->scantable.permutated[4*i+1]]= (asv1_get_level(&a->gb) * a->intra_matrix[4*i+1])>>4;
197 if(ccp&2) block[a->scantable.permutated[4*i+2]]= (asv1_get_level(&a->gb) * a->intra_matrix[4*i+2])>>4;
198 if(ccp&1) block[a->scantable.permutated[4*i+3]]= (asv1_get_level(&a->gb) * a->intra_matrix[4*i+3])>>4;
199 }
200 }
201
202 return 0;
203 }
204
205 static inline int asv2_decode_block(ASV1Context *a, DCTELEM block[64]){
206 int i, count, ccp;
207
208 count= asv2_get_bits(&a->gb, 4);
209
210 block[0]= 8*asv2_get_bits(&a->gb, 8);
211
212 ccp= get_vlc2(&a->gb, dc_ccp_vlc.table, VLC_BITS, 1);
213 if(ccp){
214 if(ccp&4) block[a->scantable.permutated[1]]= (asv2_get_level(&a->gb) * a->intra_matrix[1])>>4;
215 if(ccp&2) block[a->scantable.permutated[2]]= (asv2_get_level(&a->gb) * a->intra_matrix[2])>>4;
216 if(ccp&1) block[a->scantable.permutated[3]]= (asv2_get_level(&a->gb) * a->intra_matrix[3])>>4;
217 }
218
219 for(i=1; i<count+1; i++){
220 const int ccp= get_vlc2(&a->gb, ac_ccp_vlc.table, VLC_BITS, 1);
221
222 if(ccp){
223 if(ccp&8) block[a->scantable.permutated[4*i+0]]= (asv2_get_level(&a->gb) * a->intra_matrix[4*i+0])>>4;
224 if(ccp&4) block[a->scantable.permutated[4*i+1]]= (asv2_get_level(&a->gb) * a->intra_matrix[4*i+1])>>4;
225 if(ccp&2) block[a->scantable.permutated[4*i+2]]= (asv2_get_level(&a->gb) * a->intra_matrix[4*i+2])>>4;
226 if(ccp&1) block[a->scantable.permutated[4*i+3]]= (asv2_get_level(&a->gb) * a->intra_matrix[4*i+3])>>4;
227 }
228 }
229
230 return 0;
231 }
232
233 static inline void asv1_encode_block(ASV1Context *a, DCTELEM block[64]){
234 int i;
235 int nc_count=0;
236
237 put_bits(&a->pb, 8, (block[0] + 32)>>6);
238 block[0]= 0;
239
240 for(i=0; i<10; i++){
241 const int index= scantab[4*i];
242 int ccp=0;
243
244 if( (block[index + 0] = (block[index + 0]*a->q_intra_matrix[index + 0] + (1<<15))>>16) ) ccp |= 8;
245 if( (block[index + 8] = (block[index + 8]*a->q_intra_matrix[index + 8] + (1<<15))>>16) ) ccp |= 4;
246 if( (block[index + 1] = (block[index + 1]*a->q_intra_matrix[index + 1] + (1<<15))>>16) ) ccp |= 2;
247 if( (block[index + 9] = (block[index + 9]*a->q_intra_matrix[index + 9] + (1<<15))>>16) ) ccp |= 1;
248
249 if(ccp){
250 for(;nc_count; nc_count--)
251 put_bits(&a->pb, ccp_tab[0][1], ccp_tab[0][0]);
252
253 put_bits(&a->pb, ccp_tab[ccp][1], ccp_tab[ccp][0]);
254
255 if(ccp&8) asv1_put_level(&a->pb, block[index + 0]);
256 if(ccp&4) asv1_put_level(&a->pb, block[index + 8]);
257 if(ccp&2) asv1_put_level(&a->pb, block[index + 1]);
258 if(ccp&1) asv1_put_level(&a->pb, block[index + 9]);
259 }else{
260 nc_count++;
261 }
262 }
263 put_bits(&a->pb, ccp_tab[16][1], ccp_tab[16][0]);
264 }
265
266 static inline void asv2_encode_block(ASV1Context *a, DCTELEM block[64]){
267 int i;
268 int count=0;
269
270 for(count=63; count>3; count--){
271 const int index= scantab[count];
272
273 if( (block[index]*a->q_intra_matrix[index] + (1<<15))>>16 )
274 break;
275 }
276
277 count >>= 2;
278
279 asv2_put_bits(&a->pb, 4, count);
280 asv2_put_bits(&a->pb, 8, (block[0] + 32)>>6);
281 block[0]= 0;
282
283 for(i=0; i<=count; i++){
284 const int index= scantab[4*i];
285 int ccp=0;
286
287 if( (block[index + 0] = (block[index + 0]*a->q_intra_matrix[index + 0] + (1<<15))>>16) ) ccp |= 8;
288 if( (block[index + 8] = (block[index + 8]*a->q_intra_matrix[index + 8] + (1<<15))>>16) ) ccp |= 4;
289 if( (block[index + 1] = (block[index + 1]*a->q_intra_matrix[index + 1] + (1<<15))>>16) ) ccp |= 2;
290 if( (block[index + 9] = (block[index + 9]*a->q_intra_matrix[index + 9] + (1<<15))>>16) ) ccp |= 1;
291
292 if(i) put_bits(&a->pb, ac_ccp_tab[ccp][1], ac_ccp_tab[ccp][0]);
293 else put_bits(&a->pb, dc_ccp_tab[ccp][1], dc_ccp_tab[ccp][0]);
294
295 if(ccp){
296 if(ccp&8) asv2_put_level(&a->pb, block[index + 0]);
297 if(ccp&4) asv2_put_level(&a->pb, block[index + 8]);
298 if(ccp&2) asv2_put_level(&a->pb, block[index + 1]);
299 if(ccp&1) asv2_put_level(&a->pb, block[index + 9]);
300 }
301 }
302 }
303
304 static inline int decode_mb(ASV1Context *a, DCTELEM block[6][64]){
305 int i;
306
307 a->dsp.clear_blocks(block[0]);
308
309 if(a->avctx->codec_id == CODEC_ID_ASV1){
310 for(i=0; i<6; i++){
311 if( asv1_decode_block(a, block[i]) < 0)
312 return -1;
313 }
314 }else{
315 for(i=0; i<6; i++){
316 if( asv2_decode_block(a, block[i]) < 0)
317 return -1;
318 }
319 }
320 return 0;
321 }
322
323 static inline int encode_mb(ASV1Context *a, DCTELEM block[6][64]){
324 int i;
325
326 if(a->pb.buf_end - a->pb.buf - (put_bits_count(&a->pb)>>3) < 30*16*16*3/2/8){
327 av_log(a->avctx, AV_LOG_ERROR, "encoded frame too large\n");
328 return -1;
329 }
330
331 if(a->avctx->codec_id == CODEC_ID_ASV1){
332 for(i=0; i<6; i++)
333 asv1_encode_block(a, block[i]);
334 }else{
335 for(i=0; i<6; i++)
336 asv2_encode_block(a, block[i]);
337 }
338 return 0;
339 }
340
341 static inline void idct_put(ASV1Context *a, int mb_x, int mb_y){
342 DCTELEM (*block)[64]= a->block;
343 int linesize= a->picture.linesize[0];
344
345 uint8_t *dest_y = a->picture.data[0] + (mb_y * 16* linesize ) + mb_x * 16;
346 uint8_t *dest_cb = a->picture.data[1] + (mb_y * 8 * a->picture.linesize[1]) + mb_x * 8;
347 uint8_t *dest_cr = a->picture.data[2] + (mb_y * 8 * a->picture.linesize[2]) + mb_x * 8;
348
349 a->dsp.idct_put(dest_y , linesize, block[0]);
350 a->dsp.idct_put(dest_y + 8, linesize, block[1]);
351 a->dsp.idct_put(dest_y + 8*linesize , linesize, block[2]);
352 a->dsp.idct_put(dest_y + 8*linesize + 8, linesize, block[3]);
353
354 if(!(a->avctx->flags&CODEC_FLAG_GRAY)){
355 a->dsp.idct_put(dest_cb, a->picture.linesize[1], block[4]);
356 a->dsp.idct_put(dest_cr, a->picture.linesize[2], block[5]);
357 }
358 }
359
360 static inline void dct_get(ASV1Context *a, int mb_x, int mb_y){
361 DCTELEM (*block)[64]= a->block;
362 int linesize= a->picture.linesize[0];
363 int i;
364
365 uint8_t *ptr_y = a->picture.data[0] + (mb_y * 16* linesize ) + mb_x * 16;
366 uint8_t *ptr_cb = a->picture.data[1] + (mb_y * 8 * a->picture.linesize[1]) + mb_x * 8;
367 uint8_t *ptr_cr = a->picture.data[2] + (mb_y * 8 * a->picture.linesize[2]) + mb_x * 8;
368
369 a->dsp.get_pixels(block[0], ptr_y , linesize);
370 a->dsp.get_pixels(block[1], ptr_y + 8, linesize);
371 a->dsp.get_pixels(block[2], ptr_y + 8*linesize , linesize);
372 a->dsp.get_pixels(block[3], ptr_y + 8*linesize + 8, linesize);
373 for(i=0; i<4; i++)
374 a->dsp.fdct(block[i]);
375
376 if(!(a->avctx->flags&CODEC_FLAG_GRAY)){
377 a->dsp.get_pixels(block[4], ptr_cb, a->picture.linesize[1]);
378 a->dsp.get_pixels(block[5], ptr_cr, a->picture.linesize[2]);
379 for(i=4; i<6; i++)
380 a->dsp.fdct(block[i]);
381 }
382 }
383
384 static int decode_frame(AVCodecContext *avctx,
385 void *data, int *data_size,
386 uint8_t *buf, int buf_size)
387 {
388 ASV1Context * const a = avctx->priv_data;
389 AVFrame *picture = data;
390 AVFrame * const p= (AVFrame*)&a->picture;
391 int mb_x, mb_y;
392
393 if(p->data[0])
394 avctx->release_buffer(avctx, p);
395
396 p->reference= 0;
397 if(avctx->get_buffer(avctx, p) < 0){
398 av_log(avctx, AV_LOG_ERROR, "get_buffer() failed\n");
399 return -1;
400 }
401 p->pict_type= I_TYPE;
402 p->key_frame= 1;
403
404 a->bitstream_buffer= av_fast_realloc(a->bitstream_buffer, &a->bitstream_buffer_size, buf_size + FF_INPUT_BUFFER_PADDING_SIZE);
405
406 if(avctx->codec_id == CODEC_ID_ASV1)
407 a->dsp.bswap_buf((uint32_t*)a->bitstream_buffer, (uint32_t*)buf, buf_size/4);
408 else{
409 int i;
410 for(i=0; i<buf_size; i++)
411 a->bitstream_buffer[i]= ff_reverse[ buf[i] ];
412 }
413
414 init_get_bits(&a->gb, a->bitstream_buffer, buf_size*8);
415
416 for(mb_y=0; mb_y<a->mb_height2; mb_y++){
417 for(mb_x=0; mb_x<a->mb_width2; mb_x++){
418 if( decode_mb(a, a->block) <0)
419 return -1;
420
421 idct_put(a, mb_x, mb_y);
422 }
423 }
424
425 if(a->mb_width2 != a->mb_width){
426 mb_x= a->mb_width2;
427 for(mb_y=0; mb_y<a->mb_height2; mb_y++){
428 if( decode_mb(a, a->block) <0)
429 return -1;
430
431 idct_put(a, mb_x, mb_y);
432 }
433 }
434
435 if(a->mb_height2 != a->mb_height){
436 mb_y= a->mb_height2;
437 for(mb_x=0; mb_x<a->mb_width; mb_x++){
438 if( decode_mb(a, a->block) <0)
439 return -1;
440
441 idct_put(a, mb_x, mb_y);
442 }
443 }
444 #if 0
445 int i;
446 printf("%d %d\n", 8*buf_size, get_bits_count(&a->gb));
447 for(i=get_bits_count(&a->gb); i<8*buf_size; i++){
448 printf("%d", get_bits1(&a->gb));
449 }
450
451 for(i=0; i<s->avctx->extradata_size; i++){
452 printf("%c\n", ((uint8_t*)s->avctx->extradata)[i]);
453 }
454 #endif
455
456 *picture= *(AVFrame*)&a->picture;
457 *data_size = sizeof(AVPicture);
458
459 emms_c();
460
461 return (get_bits_count(&a->gb)+31)/32*4;
462 }
463
464 static int encode_frame(AVCodecContext *avctx, unsigned char *buf, int buf_size, void *data){
465 ASV1Context * const a = avctx->priv_data;
466 AVFrame *pict = data;
467 AVFrame * const p= (AVFrame*)&a->picture;
468 int size;
469 int mb_x, mb_y;
470
471 init_put_bits(&a->pb, buf, buf_size);
472
473 *p = *pict;
474 p->pict_type= I_TYPE;
475 p->key_frame= 1;
476
477 for(mb_y=0; mb_y<a->mb_height2; mb_y++){
478 for(mb_x=0; mb_x<a->mb_width2; mb_x++){
479 dct_get(a, mb_x, mb_y);
480 encode_mb(a, a->block);
481 }
482 }
483
484 if(a->mb_width2 != a->mb_width){
485 mb_x= a->mb_width2;
486 for(mb_y=0; mb_y<a->mb_height2; mb_y++){
487 dct_get(a, mb_x, mb_y);
488 encode_mb(a, a->block);
489 }
490 }
491
492 if(a->mb_height2 != a->mb_height){
493 mb_y= a->mb_height2;
494 for(mb_x=0; mb_x<a->mb_width; mb_x++){
495 dct_get(a, mb_x, mb_y);
496 encode_mb(a, a->block);
497 }
498 }
499 emms_c();
500
501 align_put_bits(&a->pb);
502 while(put_bits_count(&a->pb)&31)
503 put_bits(&a->pb, 8, 0);
504
505 size= put_bits_count(&a->pb)/32;
506
507 if(avctx->codec_id == CODEC_ID_ASV1)
508 a->dsp.bswap_buf((uint32_t*)buf, (uint32_t*)buf, size);
509 else{
510 int i;
511 for(i=0; i<4*size; i++)
512 buf[i]= ff_reverse[ buf[i] ];
513 }
514
515 return size*4;
516 }
517
518 static void common_init(AVCodecContext *avctx){
519 ASV1Context * const a = avctx->priv_data;
520
521 dsputil_init(&a->dsp, avctx);
522
523 a->mb_width = (avctx->width + 15) / 16;
524 a->mb_height = (avctx->height + 15) / 16;
525 a->mb_width2 = (avctx->width + 0) / 16;
526 a->mb_height2 = (avctx->height + 0) / 16;
527
528 avctx->coded_frame= (AVFrame*)&a->picture;
529 a->avctx= avctx;
530 }
531
532 static int decode_init(AVCodecContext *avctx){
533 ASV1Context * const a = avctx->priv_data;
534 AVFrame *p= (AVFrame*)&a->picture;
535 int i;
536 const int scale= avctx->codec_id == CODEC_ID_ASV1 ? 1 : 2;
537
538 common_init(avctx);
539 init_vlcs(a);
540 ff_init_scantable(a->dsp.idct_permutation, &a->scantable, scantab);
541 avctx->pix_fmt= PIX_FMT_YUV420P;
542
543 a->inv_qscale= ((uint8_t*)avctx->extradata)[0];
544 if(a->inv_qscale == 0){
545 av_log(avctx, AV_LOG_ERROR, "illegal qscale 0\n");
546 if(avctx->codec_id == CODEC_ID_ASV1)
547 a->inv_qscale= 6;
548 else
549 a->inv_qscale= 10;
550 }
551
552 for(i=0; i<64; i++){
553 int index= scantab[i];
554
555 a->intra_matrix[i]= 64*scale*ff_mpeg1_default_intra_matrix[index] / a->inv_qscale;
556 }
557
558 p->qstride= a->mb_width;
559 p->qscale_table= av_malloc( p->qstride * a->mb_height);
560 p->quality= (32*scale + a->inv_qscale/2)/a->inv_qscale;
561 memset(p->qscale_table, p->quality, p->qstride*a->mb_height);
562
563 return 0;
564 }
565
566 static int encode_init(AVCodecContext *avctx){
567 ASV1Context * const a = avctx->priv_data;
568 int i;
569 const int scale= avctx->codec_id == CODEC_ID_ASV1 ? 1 : 2;
570
571 common_init(avctx);
572
573 if(avctx->global_quality == 0) avctx->global_quality= 4*FF_QUALITY_SCALE;
574
575 a->inv_qscale= (32*scale*FF_QUALITY_SCALE + avctx->global_quality/2) / avctx->global_quality;
576
577 avctx->extradata= av_mallocz(8);
578 avctx->extradata_size=8;
579 ((uint32_t*)avctx->extradata)[0]= le2me_32(a->inv_qscale);
580 ((uint32_t*)avctx->extradata)[1]= le2me_32(ff_get_fourcc("ASUS"));
581
582 for(i=0; i<64; i++){
583 int q= 32*scale*ff_mpeg1_default_intra_matrix[i];
584 a->q_intra_matrix[i]= ((a->inv_qscale<<16) + q/2) / q;
585 }
586
587 return 0;
588 }
589
590 static int decode_end(AVCodecContext *avctx){
591 ASV1Context * const a = avctx->priv_data;
592
593 av_freep(&a->bitstream_buffer);
594 av_freep(&a->picture.qscale_table);
595 a->bitstream_buffer_size=0;
596
597 return 0;
598 }
599
600 AVCodec asv1_decoder = {
601 "asv1",
602 CODEC_TYPE_VIDEO,
603 CODEC_ID_ASV1,
604 sizeof(ASV1Context),
605 decode_init,
606 NULL,
607 decode_end,
608 decode_frame,
609 CODEC_CAP_DR1,
610 };
611
612 AVCodec asv2_decoder = {
613 "asv2",
614 CODEC_TYPE_VIDEO,
615 CODEC_ID_ASV2,
616 sizeof(ASV1Context),
617 decode_init,
618 NULL,
619 decode_end,
620 decode_frame,
621 CODEC_CAP_DR1,
622 };
623
624 #ifdef CONFIG_ENCODERS
625
626 AVCodec asv1_encoder = {
627 "asv1",
628 CODEC_TYPE_VIDEO,
629 CODEC_ID_ASV1,
630 sizeof(ASV1Context),
631 encode_init,
632 encode_frame,
633 //encode_end,
634 };
635
636 AVCodec asv2_encoder = {
637 "asv2",
638 CODEC_TYPE_VIDEO,
639 CODEC_ID_ASV2,
640 sizeof(ASV1Context),
641 encode_init,
642 encode_frame,
643 //encode_end,
644 };
645
646 #endif //CONFIG_ENCODERS
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