8dfe276f931682de93636b2fbb505bf127687ba2
[libav.git] / libavcodec / asv1.c
1 /*
2 * ASUS V1/V2 codec
3 * Copyright (c) 2003 Michael Niedermayer
4 *
5 * This file is part of Libav.
6 *
7 * Libav is free software; you can redistribute it and/or
8 * modify it under the terms of the GNU Lesser General Public
9 * License as published by the Free Software Foundation; either
10 * version 2.1 of the License, or (at your option) any later version.
11 *
12 * Libav is distributed in the hope that it will be useful,
13 * but WITHOUT ANY WARRANTY; without even the implied warranty of
14 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
15 * Lesser General Public License for more details.
16 *
17 * You should have received a copy of the GNU Lesser General Public
18 * License along with Libav; if not, write to the Free Software
19 * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA
20 */
21
22 /**
23 * @file
24 * ASUS V1/V2 codec.
25 */
26
27 #include "avcodec.h"
28 #include "libavutil/common.h"
29 #include "put_bits.h"
30 #include "dsputil.h"
31 #include "mpeg12data.h"
32
33 //#undef NDEBUG
34 //#include <assert.h>
35
36 #define VLC_BITS 6
37 #define ASV2_LEVEL_VLC_BITS 10
38
39 typedef struct ASV1Context{
40 AVCodecContext *avctx;
41 DSPContext dsp;
42 AVFrame picture;
43 PutBitContext pb;
44 GetBitContext gb;
45 ScanTable scantable;
46 int inv_qscale;
47 int mb_width;
48 int mb_height;
49 int mb_width2;
50 int mb_height2;
51 DECLARE_ALIGNED(16, DCTELEM, block)[6][64];
52 uint16_t intra_matrix[64];
53 int q_intra_matrix[64];
54 uint8_t *bitstream_buffer;
55 unsigned int bitstream_buffer_size;
56 } ASV1Context;
57
58 static const uint8_t scantab[64]={
59 0x00,0x08,0x01,0x09,0x10,0x18,0x11,0x19,
60 0x02,0x0A,0x03,0x0B,0x12,0x1A,0x13,0x1B,
61 0x04,0x0C,0x05,0x0D,0x20,0x28,0x21,0x29,
62 0x06,0x0E,0x07,0x0F,0x14,0x1C,0x15,0x1D,
63 0x22,0x2A,0x23,0x2B,0x30,0x38,0x31,0x39,
64 0x16,0x1E,0x17,0x1F,0x24,0x2C,0x25,0x2D,
65 0x32,0x3A,0x33,0x3B,0x26,0x2E,0x27,0x2F,
66 0x34,0x3C,0x35,0x3D,0x36,0x3E,0x37,0x3F,
67 };
68
69
70 static const uint8_t ccp_tab[17][2]={
71 {0x2,2}, {0x7,5}, {0xB,5}, {0x3,5},
72 {0xD,5}, {0x5,5}, {0x9,5}, {0x1,5},
73 {0xE,5}, {0x6,5}, {0xA,5}, {0x2,5},
74 {0xC,5}, {0x4,5}, {0x8,5}, {0x3,2},
75 {0xF,5}, //EOB
76 };
77
78 static const uint8_t level_tab[7][2]={
79 {3,4}, {3,3}, {3,2}, {0,3}, {2,2}, {2,3}, {2,4}
80 };
81
82 static const uint8_t dc_ccp_tab[8][2]={
83 {0x1,2}, {0xD,4}, {0xF,4}, {0xC,4},
84 {0x5,3}, {0xE,4}, {0x4,3}, {0x0,2},
85 };
86
87 static const uint8_t ac_ccp_tab[16][2]={
88 {0x00,2}, {0x3B,6}, {0x0A,4}, {0x3A,6},
89 {0x02,3}, {0x39,6}, {0x3C,6}, {0x38,6},
90 {0x03,3}, {0x3D,6}, {0x08,4}, {0x1F,5},
91 {0x09,4}, {0x0B,4}, {0x0D,4}, {0x0C,4},
92 };
93
94 static const uint8_t asv2_level_tab[63][2]={
95 {0x3F,10},{0x2F,10},{0x37,10},{0x27,10},{0x3B,10},{0x2B,10},{0x33,10},{0x23,10},
96 {0x3D,10},{0x2D,10},{0x35,10},{0x25,10},{0x39,10},{0x29,10},{0x31,10},{0x21,10},
97 {0x1F, 8},{0x17, 8},{0x1B, 8},{0x13, 8},{0x1D, 8},{0x15, 8},{0x19, 8},{0x11, 8},
98 {0x0F, 6},{0x0B, 6},{0x0D, 6},{0x09, 6},
99 {0x07, 4},{0x05, 4},
100 {0x03, 2},
101 {0x00, 5},
102 {0x02, 2},
103 {0x04, 4},{0x06, 4},
104 {0x08, 6},{0x0C, 6},{0x0A, 6},{0x0E, 6},
105 {0x10, 8},{0x18, 8},{0x14, 8},{0x1C, 8},{0x12, 8},{0x1A, 8},{0x16, 8},{0x1E, 8},
106 {0x20,10},{0x30,10},{0x28,10},{0x38,10},{0x24,10},{0x34,10},{0x2C,10},{0x3C,10},
107 {0x22,10},{0x32,10},{0x2A,10},{0x3A,10},{0x26,10},{0x36,10},{0x2E,10},{0x3E,10},
108 };
109
110
111 static VLC ccp_vlc;
112 static VLC level_vlc;
113 static VLC dc_ccp_vlc;
114 static VLC ac_ccp_vlc;
115 static VLC asv2_level_vlc;
116
117 static av_cold void init_vlcs(ASV1Context *a){
118 static int done = 0;
119
120 if (!done) {
121 done = 1;
122
123 INIT_VLC_STATIC(&ccp_vlc, VLC_BITS, 17,
124 &ccp_tab[0][1], 2, 1,
125 &ccp_tab[0][0], 2, 1, 64);
126 INIT_VLC_STATIC(&dc_ccp_vlc, VLC_BITS, 8,
127 &dc_ccp_tab[0][1], 2, 1,
128 &dc_ccp_tab[0][0], 2, 1, 64);
129 INIT_VLC_STATIC(&ac_ccp_vlc, VLC_BITS, 16,
130 &ac_ccp_tab[0][1], 2, 1,
131 &ac_ccp_tab[0][0], 2, 1, 64);
132 INIT_VLC_STATIC(&level_vlc, VLC_BITS, 7,
133 &level_tab[0][1], 2, 1,
134 &level_tab[0][0], 2, 1, 64);
135 INIT_VLC_STATIC(&asv2_level_vlc, ASV2_LEVEL_VLC_BITS, 63,
136 &asv2_level_tab[0][1], 2, 1,
137 &asv2_level_tab[0][0], 2, 1, 1024);
138 }
139 }
140
141 //FIXME write a reversed bitstream reader to avoid the double reverse
142 static inline int asv2_get_bits(GetBitContext *gb, int n){
143 return av_reverse[ get_bits(gb, n) << (8-n) ];
144 }
145
146 static inline void asv2_put_bits(PutBitContext *pb, int n, int v){
147 put_bits(pb, n, av_reverse[ v << (8-n) ]);
148 }
149
150 static inline int asv1_get_level(GetBitContext *gb){
151 int code= get_vlc2(gb, level_vlc.table, VLC_BITS, 1);
152
153 if(code==3) return get_sbits(gb, 8);
154 else return code - 3;
155 }
156
157 static inline int asv2_get_level(GetBitContext *gb){
158 int code= get_vlc2(gb, asv2_level_vlc.table, ASV2_LEVEL_VLC_BITS, 1);
159
160 if(code==31) return (int8_t)asv2_get_bits(gb, 8);
161 else return code - 31;
162 }
163
164 static inline void asv1_put_level(PutBitContext *pb, int level){
165 unsigned int index= level + 3;
166
167 if(index <= 6) put_bits(pb, level_tab[index][1], level_tab[index][0]);
168 else{
169 put_bits(pb, level_tab[3][1], level_tab[3][0]);
170 put_sbits(pb, 8, level);
171 }
172 }
173
174 static inline void asv2_put_level(PutBitContext *pb, int level){
175 unsigned int index= level + 31;
176
177 if(index <= 62) put_bits(pb, asv2_level_tab[index][1], asv2_level_tab[index][0]);
178 else{
179 put_bits(pb, asv2_level_tab[31][1], asv2_level_tab[31][0]);
180 asv2_put_bits(pb, 8, level&0xFF);
181 }
182 }
183
184 static inline int asv1_decode_block(ASV1Context *a, DCTELEM block[64]){
185 int i;
186
187 block[0]= 8*get_bits(&a->gb, 8);
188
189 for(i=0; i<11; i++){
190 const int ccp= get_vlc2(&a->gb, ccp_vlc.table, VLC_BITS, 1);
191
192 if(ccp){
193 if(ccp == 16) break;
194 if(ccp < 0 || i>=10){
195 av_log(a->avctx, AV_LOG_ERROR, "coded coeff pattern damaged\n");
196 return -1;
197 }
198
199 if(ccp&8) block[a->scantable.permutated[4*i+0]]= (asv1_get_level(&a->gb) * a->intra_matrix[4*i+0])>>4;
200 if(ccp&4) block[a->scantable.permutated[4*i+1]]= (asv1_get_level(&a->gb) * a->intra_matrix[4*i+1])>>4;
201 if(ccp&2) block[a->scantable.permutated[4*i+2]]= (asv1_get_level(&a->gb) * a->intra_matrix[4*i+2])>>4;
202 if(ccp&1) block[a->scantable.permutated[4*i+3]]= (asv1_get_level(&a->gb) * a->intra_matrix[4*i+3])>>4;
203 }
204 }
205
206 return 0;
207 }
208
209 static inline int asv2_decode_block(ASV1Context *a, DCTELEM block[64]){
210 int i, count, ccp;
211
212 count= asv2_get_bits(&a->gb, 4);
213
214 block[0]= 8*asv2_get_bits(&a->gb, 8);
215
216 ccp= get_vlc2(&a->gb, dc_ccp_vlc.table, VLC_BITS, 1);
217 if(ccp){
218 if(ccp&4) block[a->scantable.permutated[1]]= (asv2_get_level(&a->gb) * a->intra_matrix[1])>>4;
219 if(ccp&2) block[a->scantable.permutated[2]]= (asv2_get_level(&a->gb) * a->intra_matrix[2])>>4;
220 if(ccp&1) block[a->scantable.permutated[3]]= (asv2_get_level(&a->gb) * a->intra_matrix[3])>>4;
221 }
222
223 for(i=1; i<count+1; i++){
224 const int ccp= get_vlc2(&a->gb, ac_ccp_vlc.table, VLC_BITS, 1);
225
226 if(ccp){
227 if(ccp&8) block[a->scantable.permutated[4*i+0]]= (asv2_get_level(&a->gb) * a->intra_matrix[4*i+0])>>4;
228 if(ccp&4) block[a->scantable.permutated[4*i+1]]= (asv2_get_level(&a->gb) * a->intra_matrix[4*i+1])>>4;
229 if(ccp&2) block[a->scantable.permutated[4*i+2]]= (asv2_get_level(&a->gb) * a->intra_matrix[4*i+2])>>4;
230 if(ccp&1) block[a->scantable.permutated[4*i+3]]= (asv2_get_level(&a->gb) * a->intra_matrix[4*i+3])>>4;
231 }
232 }
233
234 return 0;
235 }
236
237 static inline void asv1_encode_block(ASV1Context *a, DCTELEM block[64]){
238 int i;
239 int nc_count=0;
240
241 put_bits(&a->pb, 8, (block[0] + 32)>>6);
242 block[0]= 0;
243
244 for(i=0; i<10; i++){
245 const int index= scantab[4*i];
246 int ccp=0;
247
248 if( (block[index + 0] = (block[index + 0]*a->q_intra_matrix[index + 0] + (1<<15))>>16) ) ccp |= 8;
249 if( (block[index + 8] = (block[index + 8]*a->q_intra_matrix[index + 8] + (1<<15))>>16) ) ccp |= 4;
250 if( (block[index + 1] = (block[index + 1]*a->q_intra_matrix[index + 1] + (1<<15))>>16) ) ccp |= 2;
251 if( (block[index + 9] = (block[index + 9]*a->q_intra_matrix[index + 9] + (1<<15))>>16) ) ccp |= 1;
252
253 if(ccp){
254 for(;nc_count; nc_count--)
255 put_bits(&a->pb, ccp_tab[0][1], ccp_tab[0][0]);
256
257 put_bits(&a->pb, ccp_tab[ccp][1], ccp_tab[ccp][0]);
258
259 if(ccp&8) asv1_put_level(&a->pb, block[index + 0]);
260 if(ccp&4) asv1_put_level(&a->pb, block[index + 8]);
261 if(ccp&2) asv1_put_level(&a->pb, block[index + 1]);
262 if(ccp&1) asv1_put_level(&a->pb, block[index + 9]);
263 }else{
264 nc_count++;
265 }
266 }
267 put_bits(&a->pb, ccp_tab[16][1], ccp_tab[16][0]);
268 }
269
270 static inline void asv2_encode_block(ASV1Context *a, DCTELEM block[64]){
271 int i;
272 int count=0;
273
274 for(count=63; count>3; count--){
275 const int index= scantab[count];
276
277 if( (block[index]*a->q_intra_matrix[index] + (1<<15))>>16 )
278 break;
279 }
280
281 count >>= 2;
282
283 asv2_put_bits(&a->pb, 4, count);
284 asv2_put_bits(&a->pb, 8, (block[0] + 32)>>6);
285 block[0]= 0;
286
287 for(i=0; i<=count; i++){
288 const int index= scantab[4*i];
289 int ccp=0;
290
291 if( (block[index + 0] = (block[index + 0]*a->q_intra_matrix[index + 0] + (1<<15))>>16) ) ccp |= 8;
292 if( (block[index + 8] = (block[index + 8]*a->q_intra_matrix[index + 8] + (1<<15))>>16) ) ccp |= 4;
293 if( (block[index + 1] = (block[index + 1]*a->q_intra_matrix[index + 1] + (1<<15))>>16) ) ccp |= 2;
294 if( (block[index + 9] = (block[index + 9]*a->q_intra_matrix[index + 9] + (1<<15))>>16) ) ccp |= 1;
295
296 assert(i || ccp<8);
297 if(i) put_bits(&a->pb, ac_ccp_tab[ccp][1], ac_ccp_tab[ccp][0]);
298 else put_bits(&a->pb, dc_ccp_tab[ccp][1], dc_ccp_tab[ccp][0]);
299
300 if(ccp){
301 if(ccp&8) asv2_put_level(&a->pb, block[index + 0]);
302 if(ccp&4) asv2_put_level(&a->pb, block[index + 8]);
303 if(ccp&2) asv2_put_level(&a->pb, block[index + 1]);
304 if(ccp&1) asv2_put_level(&a->pb, block[index + 9]);
305 }
306 }
307 }
308
309 static inline int decode_mb(ASV1Context *a, DCTELEM block[6][64]){
310 int i;
311
312 a->dsp.clear_blocks(block[0]);
313
314 if(a->avctx->codec_id == CODEC_ID_ASV1){
315 for(i=0; i<6; i++){
316 if( asv1_decode_block(a, block[i]) < 0)
317 return -1;
318 }
319 }else{
320 for(i=0; i<6; i++){
321 if( asv2_decode_block(a, block[i]) < 0)
322 return -1;
323 }
324 }
325 return 0;
326 }
327
328 #define MAX_MB_SIZE (30*16*16*3/2/8)
329
330 static inline int encode_mb(ASV1Context *a, DCTELEM block[6][64]){
331 int i;
332
333 if (a->pb.buf_end - a->pb.buf - (put_bits_count(&a->pb)>>3) < MAX_MB_SIZE) {
334 av_log(a->avctx, AV_LOG_ERROR, "encoded frame too large\n");
335 return -1;
336 }
337
338 if(a->avctx->codec_id == CODEC_ID_ASV1){
339 for(i=0; i<6; i++)
340 asv1_encode_block(a, block[i]);
341 }else{
342 for(i=0; i<6; i++)
343 asv2_encode_block(a, block[i]);
344 }
345 return 0;
346 }
347
348 static inline void idct_put(ASV1Context *a, int mb_x, int mb_y){
349 DCTELEM (*block)[64]= a->block;
350 int linesize= a->picture.linesize[0];
351
352 uint8_t *dest_y = a->picture.data[0] + (mb_y * 16* linesize ) + mb_x * 16;
353 uint8_t *dest_cb = a->picture.data[1] + (mb_y * 8 * a->picture.linesize[1]) + mb_x * 8;
354 uint8_t *dest_cr = a->picture.data[2] + (mb_y * 8 * a->picture.linesize[2]) + mb_x * 8;
355
356 a->dsp.idct_put(dest_y , linesize, block[0]);
357 a->dsp.idct_put(dest_y + 8, linesize, block[1]);
358 a->dsp.idct_put(dest_y + 8*linesize , linesize, block[2]);
359 a->dsp.idct_put(dest_y + 8*linesize + 8, linesize, block[3]);
360
361 if(!(a->avctx->flags&CODEC_FLAG_GRAY)){
362 a->dsp.idct_put(dest_cb, a->picture.linesize[1], block[4]);
363 a->dsp.idct_put(dest_cr, a->picture.linesize[2], block[5]);
364 }
365 }
366
367 static inline void dct_get(ASV1Context *a, int mb_x, int mb_y){
368 DCTELEM (*block)[64]= a->block;
369 int linesize= a->picture.linesize[0];
370 int i;
371
372 uint8_t *ptr_y = a->picture.data[0] + (mb_y * 16* linesize ) + mb_x * 16;
373 uint8_t *ptr_cb = a->picture.data[1] + (mb_y * 8 * a->picture.linesize[1]) + mb_x * 8;
374 uint8_t *ptr_cr = a->picture.data[2] + (mb_y * 8 * a->picture.linesize[2]) + mb_x * 8;
375
376 a->dsp.get_pixels(block[0], ptr_y , linesize);
377 a->dsp.get_pixels(block[1], ptr_y + 8, linesize);
378 a->dsp.get_pixels(block[2], ptr_y + 8*linesize , linesize);
379 a->dsp.get_pixels(block[3], ptr_y + 8*linesize + 8, linesize);
380 for(i=0; i<4; i++)
381 a->dsp.fdct(block[i]);
382
383 if(!(a->avctx->flags&CODEC_FLAG_GRAY)){
384 a->dsp.get_pixels(block[4], ptr_cb, a->picture.linesize[1]);
385 a->dsp.get_pixels(block[5], ptr_cr, a->picture.linesize[2]);
386 for(i=4; i<6; i++)
387 a->dsp.fdct(block[i]);
388 }
389 }
390
391 static int decode_frame(AVCodecContext *avctx,
392 void *data, int *data_size,
393 AVPacket *avpkt)
394 {
395 const uint8_t *buf = avpkt->data;
396 int buf_size = avpkt->size;
397 ASV1Context * const a = avctx->priv_data;
398 AVFrame *picture = data;
399 AVFrame * const p= &a->picture;
400 int mb_x, mb_y;
401
402 if(p->data[0])
403 avctx->release_buffer(avctx, p);
404
405 p->reference= 0;
406 if(avctx->get_buffer(avctx, p) < 0){
407 av_log(avctx, AV_LOG_ERROR, "get_buffer() failed\n");
408 return -1;
409 }
410 p->pict_type= AV_PICTURE_TYPE_I;
411 p->key_frame= 1;
412
413 av_fast_padded_malloc(&a->bitstream_buffer, &a->bitstream_buffer_size,
414 buf_size);
415 if (!a->bitstream_buffer)
416 return AVERROR(ENOMEM);
417
418 if(avctx->codec_id == CODEC_ID_ASV1)
419 a->dsp.bswap_buf((uint32_t*)a->bitstream_buffer, (const uint32_t*)buf, buf_size/4);
420 else{
421 int i;
422 for(i=0; i<buf_size; i++)
423 a->bitstream_buffer[i]= av_reverse[ buf[i] ];
424 }
425
426 init_get_bits(&a->gb, a->bitstream_buffer, buf_size*8);
427
428 for(mb_y=0; mb_y<a->mb_height2; mb_y++){
429 for(mb_x=0; mb_x<a->mb_width2; mb_x++){
430 if( decode_mb(a, a->block) <0)
431 return -1;
432
433 idct_put(a, mb_x, mb_y);
434 }
435 }
436
437 if(a->mb_width2 != a->mb_width){
438 mb_x= a->mb_width2;
439 for(mb_y=0; mb_y<a->mb_height2; mb_y++){
440 if( decode_mb(a, a->block) <0)
441 return -1;
442
443 idct_put(a, mb_x, mb_y);
444 }
445 }
446
447 if(a->mb_height2 != a->mb_height){
448 mb_y= a->mb_height2;
449 for(mb_x=0; mb_x<a->mb_width; mb_x++){
450 if( decode_mb(a, a->block) <0)
451 return -1;
452
453 idct_put(a, mb_x, mb_y);
454 }
455 }
456
457 *picture = a->picture;
458 *data_size = sizeof(AVPicture);
459
460 emms_c();
461
462 return (get_bits_count(&a->gb)+31)/32*4;
463 }
464
465 #if CONFIG_ASV1_ENCODER || CONFIG_ASV2_ENCODER
466 static int encode_frame(AVCodecContext *avctx, AVPacket *pkt,
467 const AVFrame *pict, int *got_packet)
468 {
469 ASV1Context * const a = avctx->priv_data;
470 AVFrame * const p= &a->picture;
471 int size, ret;
472 int mb_x, mb_y;
473
474 if (!pkt->data &&
475 (ret = av_new_packet(pkt, a->mb_height*a->mb_width*MAX_MB_SIZE +
476 FF_MIN_BUFFER_SIZE)) < 0) {
477 av_log(avctx, AV_LOG_ERROR, "Error getting output packet.\n");
478 return ret;
479 }
480
481 init_put_bits(&a->pb, pkt->data, pkt->size);
482
483 *p = *pict;
484 p->pict_type= AV_PICTURE_TYPE_I;
485 p->key_frame= 1;
486
487 for(mb_y=0; mb_y<a->mb_height2; mb_y++){
488 for(mb_x=0; mb_x<a->mb_width2; mb_x++){
489 dct_get(a, mb_x, mb_y);
490 encode_mb(a, a->block);
491 }
492 }
493
494 if(a->mb_width2 != a->mb_width){
495 mb_x= a->mb_width2;
496 for(mb_y=0; mb_y<a->mb_height2; mb_y++){
497 dct_get(a, mb_x, mb_y);
498 encode_mb(a, a->block);
499 }
500 }
501
502 if(a->mb_height2 != a->mb_height){
503 mb_y= a->mb_height2;
504 for(mb_x=0; mb_x<a->mb_width; mb_x++){
505 dct_get(a, mb_x, mb_y);
506 encode_mb(a, a->block);
507 }
508 }
509 emms_c();
510
511 avpriv_align_put_bits(&a->pb);
512 while(put_bits_count(&a->pb)&31)
513 put_bits(&a->pb, 8, 0);
514
515 size= put_bits_count(&a->pb)/32;
516
517 if(avctx->codec_id == CODEC_ID_ASV1)
518 a->dsp.bswap_buf((uint32_t*)pkt->data, (uint32_t*)pkt->data, size);
519 else{
520 int i;
521 for(i=0; i<4*size; i++)
522 pkt->data[i] = av_reverse[pkt->data[i]];
523 }
524
525 pkt->size = size*4;
526 pkt->flags |= AV_PKT_FLAG_KEY;
527 *got_packet = 1;
528
529 return 0;
530 }
531 #endif /* CONFIG_ASV1_ENCODER || CONFIG_ASV2_ENCODER */
532
533 static av_cold void common_init(AVCodecContext *avctx){
534 ASV1Context * const a = avctx->priv_data;
535
536 ff_dsputil_init(&a->dsp, avctx);
537
538 a->mb_width = (avctx->width + 15) / 16;
539 a->mb_height = (avctx->height + 15) / 16;
540 a->mb_width2 = (avctx->width + 0) / 16;
541 a->mb_height2 = (avctx->height + 0) / 16;
542
543 avctx->coded_frame= &a->picture;
544 a->avctx= avctx;
545 }
546
547 static av_cold int decode_init(AVCodecContext *avctx){
548 ASV1Context * const a = avctx->priv_data;
549 AVFrame *p= &a->picture;
550 int i;
551 const int scale= avctx->codec_id == CODEC_ID_ASV1 ? 1 : 2;
552
553 common_init(avctx);
554 init_vlcs(a);
555 ff_init_scantable(a->dsp.idct_permutation, &a->scantable, scantab);
556 avctx->pix_fmt= PIX_FMT_YUV420P;
557
558 a->inv_qscale= avctx->extradata[0];
559 if(a->inv_qscale == 0){
560 av_log(avctx, AV_LOG_ERROR, "illegal qscale 0\n");
561 if(avctx->codec_id == CODEC_ID_ASV1)
562 a->inv_qscale= 6;
563 else
564 a->inv_qscale= 10;
565 }
566
567 for(i=0; i<64; i++){
568 int index= scantab[i];
569
570 a->intra_matrix[i]= 64*scale*ff_mpeg1_default_intra_matrix[index] / a->inv_qscale;
571 }
572
573 p->qstride= a->mb_width;
574 p->qscale_table= av_malloc( p->qstride * a->mb_height);
575 p->quality= (32*scale + a->inv_qscale/2)/a->inv_qscale;
576 memset(p->qscale_table, p->quality, p->qstride*a->mb_height);
577
578 return 0;
579 }
580
581 #if CONFIG_ASV1_ENCODER || CONFIG_ASV2_ENCODER
582 static av_cold int encode_init(AVCodecContext *avctx){
583 ASV1Context * const a = avctx->priv_data;
584 int i;
585 const int scale= avctx->codec_id == CODEC_ID_ASV1 ? 1 : 2;
586
587 common_init(avctx);
588
589 if(avctx->global_quality == 0) avctx->global_quality= 4*FF_QUALITY_SCALE;
590
591 a->inv_qscale= (32*scale*FF_QUALITY_SCALE + avctx->global_quality/2) / avctx->global_quality;
592
593 avctx->extradata= av_mallocz(8);
594 avctx->extradata_size=8;
595 ((uint32_t*)avctx->extradata)[0]= av_le2ne32(a->inv_qscale);
596 ((uint32_t*)avctx->extradata)[1]= av_le2ne32(AV_RL32("ASUS"));
597
598 for(i=0; i<64; i++){
599 int q= 32*scale*ff_mpeg1_default_intra_matrix[i];
600 a->q_intra_matrix[i]= ((a->inv_qscale<<16) + q/2) / q;
601 }
602
603 return 0;
604 }
605 #endif /* CONFIG_ASV1_ENCODER || CONFIG_ASV2_ENCODER */
606
607 static av_cold int decode_end(AVCodecContext *avctx){
608 ASV1Context * const a = avctx->priv_data;
609
610 av_freep(&a->bitstream_buffer);
611 av_freep(&a->picture.qscale_table);
612 a->bitstream_buffer_size=0;
613
614 if(a->picture.data[0])
615 avctx->release_buffer(avctx, &a->picture);
616
617 return 0;
618 }
619
620 AVCodec ff_asv1_decoder = {
621 .name = "asv1",
622 .type = AVMEDIA_TYPE_VIDEO,
623 .id = CODEC_ID_ASV1,
624 .priv_data_size = sizeof(ASV1Context),
625 .init = decode_init,
626 .close = decode_end,
627 .decode = decode_frame,
628 .capabilities = CODEC_CAP_DR1,
629 .long_name= NULL_IF_CONFIG_SMALL("ASUS V1"),
630 };
631
632 AVCodec ff_asv2_decoder = {
633 .name = "asv2",
634 .type = AVMEDIA_TYPE_VIDEO,
635 .id = CODEC_ID_ASV2,
636 .priv_data_size = sizeof(ASV1Context),
637 .init = decode_init,
638 .close = decode_end,
639 .decode = decode_frame,
640 .capabilities = CODEC_CAP_DR1,
641 .long_name= NULL_IF_CONFIG_SMALL("ASUS V2"),
642 };
643
644 #if CONFIG_ASV1_ENCODER
645 AVCodec ff_asv1_encoder = {
646 .name = "asv1",
647 .type = AVMEDIA_TYPE_VIDEO,
648 .id = CODEC_ID_ASV1,
649 .priv_data_size = sizeof(ASV1Context),
650 .init = encode_init,
651 .encode2 = encode_frame,
652 //encode_end,
653 .pix_fmts= (const enum PixelFormat[]){PIX_FMT_YUV420P, PIX_FMT_NONE},
654 .long_name= NULL_IF_CONFIG_SMALL("ASUS V1"),
655 };
656 #endif
657
658 #if CONFIG_ASV2_ENCODER
659 AVCodec ff_asv2_encoder = {
660 .name = "asv2",
661 .type = AVMEDIA_TYPE_VIDEO,
662 .id = CODEC_ID_ASV2,
663 .priv_data_size = sizeof(ASV1Context),
664 .init = encode_init,
665 .encode2 = encode_frame,
666 //encode_end,
667 .pix_fmts= (const enum PixelFormat[]){PIX_FMT_YUV420P, PIX_FMT_NONE},
668 .long_name= NULL_IF_CONFIG_SMALL("ASUS V2"),
669 };
670 #endif