1/* 2 * ASUS V1/V2 codec 3 * Copyright (c) 2003 Michael Niedermayer 4 * 5 * This file is part of FFmpeg. 6 * 7 * FFmpeg 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 * FFmpeg 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 FFmpeg; 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 libavcodec/asv1.c 24 * ASUS V1/V2 codec. 25 */ 26 27#include "avcodec.h" 28#include "bitstream.h" 29#include "dsputil.h" 30#include "mpeg12data.h" 31 32//#undef NDEBUG 33//#include <assert.h> 34 35#define VLC_BITS 6 36#define ASV2_LEVEL_VLC_BITS 10 37 38typedef struct ASV1Context{ 39 AVCodecContext *avctx; 40 DSPContext dsp; 41 AVFrame picture; 42 PutBitContext pb; 43 GetBitContext gb; 44 ScanTable scantable; 45 int inv_qscale; 46 int mb_width; 47 int mb_height; 48 int mb_width2; 49 int mb_height2; 50 DECLARE_ALIGNED_16(DCTELEM, block[6][64]); 51 DECLARE_ALIGNED_8(uint16_t, intra_matrix[64]); 52 DECLARE_ALIGNED_8(int, q_intra_matrix[64]); 53 uint8_t *bitstream_buffer; 54 unsigned int bitstream_buffer_size; 55} ASV1Context; 56 57static const uint8_t scantab[64]={ 58 0x00,0x08,0x01,0x09,0x10,0x18,0x11,0x19, 59 0x02,0x0A,0x03,0x0B,0x12,0x1A,0x13,0x1B, 60 0x04,0x0C,0x05,0x0D,0x20,0x28,0x21,0x29, 61 0x06,0x0E,0x07,0x0F,0x14,0x1C,0x15,0x1D, 62 0x22,0x2A,0x23,0x2B,0x30,0x38,0x31,0x39, 63 0x16,0x1E,0x17,0x1F,0x24,0x2C,0x25,0x2D, 64 0x32,0x3A,0x33,0x3B,0x26,0x2E,0x27,0x2F, 65 0x34,0x3C,0x35,0x3D,0x36,0x3E,0x37,0x3F, 66}; 67 68 69static const uint8_t ccp_tab[17][2]={ 70 {0x2,2}, {0x7,5}, {0xB,5}, {0x3,5}, 71 {0xD,5}, {0x5,5}, {0x9,5}, {0x1,5}, 72 {0xE,5}, {0x6,5}, {0xA,5}, {0x2,5}, 73 {0xC,5}, {0x4,5}, {0x8,5}, {0x3,2}, 74 {0xF,5}, //EOB 75}; 76 77static const uint8_t level_tab[7][2]={ 78 {3,4}, {3,3}, {3,2}, {0,3}, {2,2}, {2,3}, {2,4} 79}; 80 81static const uint8_t dc_ccp_tab[8][2]={ 82 {0x1,2}, {0xD,4}, {0xF,4}, {0xC,4}, 83 {0x5,3}, {0xE,4}, {0x4,3}, {0x0,2}, 84}; 85 86static const uint8_t ac_ccp_tab[16][2]={ 87 {0x00,2}, {0x3B,6}, {0x0A,4}, {0x3A,6}, 88 {0x02,3}, {0x39,6}, {0x3C,6}, {0x38,6}, 89 {0x03,3}, {0x3D,6}, {0x08,4}, {0x1F,5}, 90 {0x09,4}, {0x0B,4}, {0x0D,4}, {0x0C,4}, 91}; 92 93static const uint8_t asv2_level_tab[63][2]={ 94 {0x3F,10},{0x2F,10},{0x37,10},{0x27,10},{0x3B,10},{0x2B,10},{0x33,10},{0x23,10}, 95 {0x3D,10},{0x2D,10},{0x35,10},{0x25,10},{0x39,10},{0x29,10},{0x31,10},{0x21,10}, 96 {0x1F, 8},{0x17, 8},{0x1B, 8},{0x13, 8},{0x1D, 8},{0x15, 8},{0x19, 8},{0x11, 8}, 97 {0x0F, 6},{0x0B, 6},{0x0D, 6},{0x09, 6}, 98 {0x07, 4},{0x05, 4}, 99 {0x03, 2}, 100 {0x00, 5}, 101 {0x02, 2}, 102 {0x04, 4},{0x06, 4}, 103 {0x08, 6},{0x0C, 6},{0x0A, 6},{0x0E, 6}, 104 {0x10, 8},{0x18, 8},{0x14, 8},{0x1C, 8},{0x12, 8},{0x1A, 8},{0x16, 8},{0x1E, 8}, 105 {0x20,10},{0x30,10},{0x28,10},{0x38,10},{0x24,10},{0x34,10},{0x2C,10},{0x3C,10}, 106 {0x22,10},{0x32,10},{0x2A,10},{0x3A,10},{0x26,10},{0x36,10},{0x2E,10},{0x3E,10}, 107}; 108 109 110static VLC ccp_vlc; 111static VLC level_vlc; 112static VLC dc_ccp_vlc; 113static VLC ac_ccp_vlc; 114static VLC asv2_level_vlc; 115 116static av_cold void init_vlcs(ASV1Context *a){ 117 static int done = 0; 118 119 if (!done) { 120 done = 1; 121 122 init_vlc(&ccp_vlc, VLC_BITS, 17, 123 &ccp_tab[0][1], 2, 1, 124 &ccp_tab[0][0], 2, 1, 1); 125 init_vlc(&dc_ccp_vlc, VLC_BITS, 8, 126 &dc_ccp_tab[0][1], 2, 1, 127 &dc_ccp_tab[0][0], 2, 1, 1); 128 init_vlc(&ac_ccp_vlc, VLC_BITS, 16, 129 &ac_ccp_tab[0][1], 2, 1, 130 &ac_ccp_tab[0][0], 2, 1, 1); 131 init_vlc(&level_vlc, VLC_BITS, 7, 132 &level_tab[0][1], 2, 1, 133 &level_tab[0][0], 2, 1, 1); 134 init_vlc(&asv2_level_vlc, ASV2_LEVEL_VLC_BITS, 63, 135 &asv2_level_tab[0][1], 2, 1, 136 &asv2_level_tab[0][0], 2, 1, 1); 137 } 138} 139 140//FIXME write a reversed bitstream reader to avoid the double reverse 141static inline int asv2_get_bits(GetBitContext *gb, int n){ 142 return ff_reverse[ get_bits(gb, n) << (8-n) ]; 143} 144 145static inline void asv2_put_bits(PutBitContext *pb, int n, int v){ 146 put_bits(pb, n, ff_reverse[ v << (8-n) ]); 147} 148 149static inline int asv1_get_level(GetBitContext *gb){ 150 int code= get_vlc2(gb, level_vlc.table, VLC_BITS, 1); 151 152 if(code==3) return get_sbits(gb, 8); 153 else return code - 3; 154} 155 156static inline int asv2_get_level(GetBitContext *gb){ 157 int code= get_vlc2(gb, asv2_level_vlc.table, ASV2_LEVEL_VLC_BITS, 1); 158 159 if(code==31) return (int8_t)asv2_get_bits(gb, 8); 160 else return code - 31; 161} 162 163static inline void asv1_put_level(PutBitContext *pb, int level){ 164 unsigned int index= level + 3; 165 166 if(index <= 6) put_bits(pb, level_tab[index][1], level_tab[index][0]); 167 else{ 168 put_bits(pb, level_tab[3][1], level_tab[3][0]); 169 put_sbits(pb, 8, level); 170 } 171} 172 173static inline void asv2_put_level(PutBitContext *pb, int level){ 174 unsigned int index= level + 31; 175 176 if(index <= 62) put_bits(pb, asv2_level_tab[index][1], asv2_level_tab[index][0]); 177 else{ 178 put_bits(pb, asv2_level_tab[31][1], asv2_level_tab[31][0]); 179 asv2_put_bits(pb, 8, level&0xFF); 180 } 181} 182 183static inline int asv1_decode_block(ASV1Context *a, DCTELEM block[64]){ 184 int i; 185 186 block[0]= 8*get_bits(&a->gb, 8); 187 188 for(i=0; i<11; i++){ 189 const int ccp= get_vlc2(&a->gb, ccp_vlc.table, VLC_BITS, 1); 190 191 if(ccp){ 192 if(ccp == 16) break; 193 if(ccp < 0 || i>=10){ 194 av_log(a->avctx, AV_LOG_ERROR, "coded coeff pattern damaged\n"); 195 return -1; 196 } 197 198 if(ccp&8) block[a->scantable.permutated[4*i+0]]= (asv1_get_level(&a->gb) * a->intra_matrix[4*i+0])>>4; 199 if(ccp&4) block[a->scantable.permutated[4*i+1]]= (asv1_get_level(&a->gb) * a->intra_matrix[4*i+1])>>4; 200 if(ccp&2) block[a->scantable.permutated[4*i+2]]= (asv1_get_level(&a->gb) * a->intra_matrix[4*i+2])>>4; 201 if(ccp&1) block[a->scantable.permutated[4*i+3]]= (asv1_get_level(&a->gb) * a->intra_matrix[4*i+3])>>4; 202 } 203 } 204 205 return 0; 206} 207 208static inline int asv2_decode_block(ASV1Context *a, DCTELEM block[64]){ 209 int i, count, ccp; 210 211 count= asv2_get_bits(&a->gb, 4); 212 213 block[0]= 8*asv2_get_bits(&a->gb, 8); 214 215 ccp= get_vlc2(&a->gb, dc_ccp_vlc.table, VLC_BITS, 1); 216 if(ccp){ 217 if(ccp&4) block[a->scantable.permutated[1]]= (asv2_get_level(&a->gb) * a->intra_matrix[1])>>4; 218 if(ccp&2) block[a->scantable.permutated[2]]= (asv2_get_level(&a->gb) * a->intra_matrix[2])>>4; 219 if(ccp&1) block[a->scantable.permutated[3]]= (asv2_get_level(&a->gb) * a->intra_matrix[3])>>4; 220 } 221 222 for(i=1; i<count+1; i++){ 223 const int ccp= get_vlc2(&a->gb, ac_ccp_vlc.table, VLC_BITS, 1); 224 225 if(ccp){ 226 if(ccp&8) block[a->scantable.permutated[4*i+0]]= (asv2_get_level(&a->gb) * a->intra_matrix[4*i+0])>>4; 227 if(ccp&4) block[a->scantable.permutated[4*i+1]]= (asv2_get_level(&a->gb) * a->intra_matrix[4*i+1])>>4; 228 if(ccp&2) block[a->scantable.permutated[4*i+2]]= (asv2_get_level(&a->gb) * a->intra_matrix[4*i+2])>>4; 229 if(ccp&1) block[a->scantable.permutated[4*i+3]]= (asv2_get_level(&a->gb) * a->intra_matrix[4*i+3])>>4; 230 } 231 } 232 233 return 0; 234} 235 236static inline void asv1_encode_block(ASV1Context *a, DCTELEM block[64]){ 237 int i; 238 int nc_count=0; 239 240 put_bits(&a->pb, 8, (block[0] + 32)>>6); 241 block[0]= 0; 242 243 for(i=0; i<10; i++){ 244 const int index= scantab[4*i]; 245 int ccp=0; 246 247 if( (block[index + 0] = (block[index + 0]*a->q_intra_matrix[index + 0] + (1<<15))>>16) ) ccp |= 8; 248 if( (block[index + 8] = (block[index + 8]*a->q_intra_matrix[index + 8] + (1<<15))>>16) ) ccp |= 4; 249 if( (block[index + 1] = (block[index + 1]*a->q_intra_matrix[index + 1] + (1<<15))>>16) ) ccp |= 2; 250 if( (block[index + 9] = (block[index + 9]*a->q_intra_matrix[index + 9] + (1<<15))>>16) ) ccp |= 1; 251 252 if(ccp){ 253 for(;nc_count; nc_count--) 254 put_bits(&a->pb, ccp_tab[0][1], ccp_tab[0][0]); 255 256 put_bits(&a->pb, ccp_tab[ccp][1], ccp_tab[ccp][0]); 257 258 if(ccp&8) asv1_put_level(&a->pb, block[index + 0]); 259 if(ccp&4) asv1_put_level(&a->pb, block[index + 8]); 260 if(ccp&2) asv1_put_level(&a->pb, block[index + 1]); 261 if(ccp&1) asv1_put_level(&a->pb, block[index + 9]); 262 }else{ 263 nc_count++; 264 } 265 } 266 put_bits(&a->pb, ccp_tab[16][1], ccp_tab[16][0]); 267} 268 269static inline void asv2_encode_block(ASV1Context *a, DCTELEM block[64]){ 270 int i; 271 int count=0; 272 273 for(count=63; count>3; count--){ 274 const int index= scantab[count]; 275 276 if( (block[index]*a->q_intra_matrix[index] + (1<<15))>>16 ) 277 break; 278 } 279 280 count >>= 2; 281 282 asv2_put_bits(&a->pb, 4, count); 283 asv2_put_bits(&a->pb, 8, (block[0] + 32)>>6); 284 block[0]= 0; 285 286 for(i=0; i<=count; i++){ 287 const int index= scantab[4*i]; 288 int ccp=0; 289 290 if( (block[index + 0] = (block[index + 0]*a->q_intra_matrix[index + 0] + (1<<15))>>16) ) ccp |= 8; 291 if( (block[index + 8] = (block[index + 8]*a->q_intra_matrix[index + 8] + (1<<15))>>16) ) ccp |= 4; 292 if( (block[index + 1] = (block[index + 1]*a->q_intra_matrix[index + 1] + (1<<15))>>16) ) ccp |= 2; 293 if( (block[index + 9] = (block[index + 9]*a->q_intra_matrix[index + 9] + (1<<15))>>16) ) ccp |= 1; 294 295 assert(i || ccp<8); 296 if(i) put_bits(&a->pb, ac_ccp_tab[ccp][1], ac_ccp_tab[ccp][0]); 297 else put_bits(&a->pb, dc_ccp_tab[ccp][1], dc_ccp_tab[ccp][0]); 298 299 if(ccp){ 300 if(ccp&8) asv2_put_level(&a->pb, block[index + 0]); 301 if(ccp&4) asv2_put_level(&a->pb, block[index + 8]); 302 if(ccp&2) asv2_put_level(&a->pb, block[index + 1]); 303 if(ccp&1) asv2_put_level(&a->pb, block[index + 9]); 304 } 305 } 306} 307 308static inline int decode_mb(ASV1Context *a, DCTELEM block[6][64]){ 309 int i; 310 311 a->dsp.clear_blocks(block[0]); 312 313 if(a->avctx->codec_id == CODEC_ID_ASV1){ 314 for(i=0; i<6; i++){ 315 if( asv1_decode_block(a, block[i]) < 0) 316 return -1; 317 } 318 }else{ 319 for(i=0; i<6; i++){ 320 if( asv2_decode_block(a, block[i]) < 0) 321 return -1; 322 } 323 } 324 return 0; 325} 326 327static inline int encode_mb(ASV1Context *a, DCTELEM block[6][64]){ 328 int i; 329 330 if(a->pb.buf_end - a->pb.buf - (put_bits_count(&a->pb)>>3) < 30*16*16*3/2/8){ 331 av_log(a->avctx, AV_LOG_ERROR, "encoded frame too large\n"); 332 return -1; 333 } 334 335 if(a->avctx->codec_id == CODEC_ID_ASV1){ 336 for(i=0; i<6; i++) 337 asv1_encode_block(a, block[i]); 338 }else{ 339 for(i=0; i<6; i++) 340 asv2_encode_block(a, block[i]); 341 } 342 return 0; 343} 344 345static inline void idct_put(ASV1Context *a, int mb_x, int mb_y){ 346 DCTELEM (*block)[64]= a->block; 347 int linesize= a->picture.linesize[0]; 348 349 uint8_t *dest_y = a->picture.data[0] + (mb_y * 16* linesize ) + mb_x * 16; 350 uint8_t *dest_cb = a->picture.data[1] + (mb_y * 8 * a->picture.linesize[1]) + mb_x * 8; 351 uint8_t *dest_cr = a->picture.data[2] + (mb_y * 8 * a->picture.linesize[2]) + mb_x * 8; 352 353 a->dsp.idct_put(dest_y , linesize, block[0]); 354 a->dsp.idct_put(dest_y + 8, linesize, block[1]); 355 a->dsp.idct_put(dest_y + 8*linesize , linesize, block[2]); 356 a->dsp.idct_put(dest_y + 8*linesize + 8, linesize, block[3]); 357 358 if(!(a->avctx->flags&CODEC_FLAG_GRAY)){ 359 a->dsp.idct_put(dest_cb, a->picture.linesize[1], block[4]); 360 a->dsp.idct_put(dest_cr, a->picture.linesize[2], block[5]); 361 } 362} 363 364static inline void dct_get(ASV1Context *a, int mb_x, int mb_y){ 365 DCTELEM (*block)[64]= a->block; 366 int linesize= a->picture.linesize[0]; 367 int i; 368 369 uint8_t *ptr_y = a->picture.data[0] + (mb_y * 16* linesize ) + mb_x * 16; 370 uint8_t *ptr_cb = a->picture.data[1] + (mb_y * 8 * a->picture.linesize[1]) + mb_x * 8; 371 uint8_t *ptr_cr = a->picture.data[2] + (mb_y * 8 * a->picture.linesize[2]) + mb_x * 8; 372 373 a->dsp.get_pixels(block[0], ptr_y , linesize); 374 a->dsp.get_pixels(block[1], ptr_y + 8, linesize); 375 a->dsp.get_pixels(block[2], ptr_y + 8*linesize , linesize); 376 a->dsp.get_pixels(block[3], ptr_y + 8*linesize + 8, linesize); 377 for(i=0; i<4; i++) 378 a->dsp.fdct(block[i]); 379 380 if(!(a->avctx->flags&CODEC_FLAG_GRAY)){ 381 a->dsp.get_pixels(block[4], ptr_cb, a->picture.linesize[1]); 382 a->dsp.get_pixels(block[5], ptr_cr, a->picture.linesize[2]); 383 for(i=4; i<6; i++) 384 a->dsp.fdct(block[i]); 385 } 386} 387 388static int decode_frame(AVCodecContext *avctx, 389 void *data, int *data_size, 390 const uint8_t *buf, int buf_size) 391{ 392 ASV1Context * const a = avctx->priv_data; 393 AVFrame *picture = data; 394 AVFrame * const p= (AVFrame*)&a->picture; 395 int mb_x, mb_y; 396 397 if(p->data[0]) 398 avctx->release_buffer(avctx, p); 399 400 p->reference= 0; 401 if(avctx->get_buffer(avctx, p) < 0){ 402 av_log(avctx, AV_LOG_ERROR, "get_buffer() failed\n"); 403 return -1; 404 } 405 p->pict_type= FF_I_TYPE; 406 p->key_frame= 1; 407 408 a->bitstream_buffer= av_fast_realloc(a->bitstream_buffer, &a->bitstream_buffer_size, buf_size + FF_INPUT_BUFFER_PADDING_SIZE); 409 410 if(avctx->codec_id == CODEC_ID_ASV1) 411 a->dsp.bswap_buf((uint32_t*)a->bitstream_buffer, (const uint32_t*)buf, buf_size/4); 412 else{ 413 int i; 414 for(i=0; i<buf_size; i++) 415 a->bitstream_buffer[i]= ff_reverse[ buf[i] ]; 416 } 417 418 init_get_bits(&a->gb, a->bitstream_buffer, buf_size*8); 419 420 for(mb_y=0; mb_y<a->mb_height2; mb_y++){ 421 for(mb_x=0; mb_x<a->mb_width2; mb_x++){ 422 if( decode_mb(a, a->block) <0) 423 return -1; 424 425 idct_put(a, mb_x, mb_y); 426 } 427 } 428 429 if(a->mb_width2 != a->mb_width){ 430 mb_x= a->mb_width2; 431 for(mb_y=0; mb_y<a->mb_height2; mb_y++){ 432 if( decode_mb(a, a->block) <0) 433 return -1; 434 435 idct_put(a, mb_x, mb_y); 436 } 437 } 438 439 if(a->mb_height2 != a->mb_height){ 440 mb_y= a->mb_height2; 441 for(mb_x=0; mb_x<a->mb_width; mb_x++){ 442 if( decode_mb(a, a->block) <0) 443 return -1; 444 445 idct_put(a, mb_x, mb_y); 446 } 447 } 448#if 0 449int i; 450printf("%d %d\n", 8*buf_size, get_bits_count(&a->gb)); 451for(i=get_bits_count(&a->gb); i<8*buf_size; i++){ 452 printf("%d", get_bits1(&a->gb)); 453} 454 455for(i=0; i<s->avctx->extradata_size; i++){ 456 printf("%c\n", ((uint8_t*)s->avctx->extradata)[i]); 457} 458#endif 459 460 *picture= *(AVFrame*)&a->picture; 461 *data_size = sizeof(AVPicture); 462 463 emms_c(); 464 465 return (get_bits_count(&a->gb)+31)/32*4; 466} 467 468#if CONFIG_ASV1_ENCODER || CONFIG_ASV2_ENCODER 469static int encode_frame(AVCodecContext *avctx, unsigned char *buf, int buf_size, void *data){ 470 ASV1Context * const a = avctx->priv_data; 471 AVFrame *pict = data; 472 AVFrame * const p= (AVFrame*)&a->picture; 473 int size; 474 int mb_x, mb_y; 475 476 init_put_bits(&a->pb, buf, buf_size); 477 478 *p = *pict; 479 p->pict_type= FF_I_TYPE; 480 p->key_frame= 1; 481 482 for(mb_y=0; mb_y<a->mb_height2; mb_y++){ 483 for(mb_x=0; mb_x<a->mb_width2; mb_x++){ 484 dct_get(a, mb_x, mb_y); 485 encode_mb(a, a->block); 486 } 487 } 488 489 if(a->mb_width2 != a->mb_width){ 490 mb_x= a->mb_width2; 491 for(mb_y=0; mb_y<a->mb_height2; mb_y++){ 492 dct_get(a, mb_x, mb_y); 493 encode_mb(a, a->block); 494 } 495 } 496 497 if(a->mb_height2 != a->mb_height){ 498 mb_y= a->mb_height2; 499 for(mb_x=0; mb_x<a->mb_width; mb_x++){ 500 dct_get(a, mb_x, mb_y); 501 encode_mb(a, a->block); 502 } 503 } 504 emms_c(); 505 506 align_put_bits(&a->pb); 507 while(put_bits_count(&a->pb)&31) 508 put_bits(&a->pb, 8, 0); 509 510 size= put_bits_count(&a->pb)/32; 511 512 if(avctx->codec_id == CODEC_ID_ASV1) 513 a->dsp.bswap_buf((uint32_t*)buf, (uint32_t*)buf, size); 514 else{ 515 int i; 516 for(i=0; i<4*size; i++) 517 buf[i]= ff_reverse[ buf[i] ]; 518 } 519 520 return size*4; 521} 522#endif /* CONFIG_ASV1_ENCODER || CONFIG_ASV2_ENCODER */ 523 524static av_cold void common_init(AVCodecContext *avctx){ 525 ASV1Context * const a = avctx->priv_data; 526 527 dsputil_init(&a->dsp, avctx); 528 529 a->mb_width = (avctx->width + 15) / 16; 530 a->mb_height = (avctx->height + 15) / 16; 531 a->mb_width2 = (avctx->width + 0) / 16; 532 a->mb_height2 = (avctx->height + 0) / 16; 533 534 avctx->coded_frame= (AVFrame*)&a->picture; 535 a->avctx= avctx; 536} 537 538static av_cold int decode_init(AVCodecContext *avctx){ 539 ASV1Context * const a = avctx->priv_data; 540 AVFrame *p= (AVFrame*)&a->picture; 541 int i; 542 const int scale= avctx->codec_id == CODEC_ID_ASV1 ? 1 : 2; 543 544 common_init(avctx); 545 init_vlcs(a); 546 ff_init_scantable(a->dsp.idct_permutation, &a->scantable, scantab); 547 avctx->pix_fmt= PIX_FMT_YUV420P; 548 549 a->inv_qscale= ((uint8_t*)avctx->extradata)[0]; 550 if(a->inv_qscale == 0){ 551 av_log(avctx, AV_LOG_ERROR, "illegal qscale 0\n"); 552 if(avctx->codec_id == CODEC_ID_ASV1) 553 a->inv_qscale= 6; 554 else 555 a->inv_qscale= 10; 556 } 557 558 for(i=0; i<64; i++){ 559 int index= scantab[i]; 560 561 a->intra_matrix[i]= 64*scale*ff_mpeg1_default_intra_matrix[index] / a->inv_qscale; 562 } 563 564 p->qstride= a->mb_width; 565 p->qscale_table= av_malloc( p->qstride * a->mb_height); 566 p->quality= (32*scale + a->inv_qscale/2)/a->inv_qscale; 567 memset(p->qscale_table, p->quality, p->qstride*a->mb_height); 568 569 return 0; 570} 571 572#if CONFIG_ASV1_ENCODER || CONFIG_ASV2_ENCODER 573static av_cold int encode_init(AVCodecContext *avctx){ 574 ASV1Context * const a = avctx->priv_data; 575 int i; 576 const int scale= avctx->codec_id == CODEC_ID_ASV1 ? 1 : 2; 577 578 common_init(avctx); 579 580 if(avctx->global_quality == 0) avctx->global_quality= 4*FF_QUALITY_SCALE; 581 582 a->inv_qscale= (32*scale*FF_QUALITY_SCALE + avctx->global_quality/2) / avctx->global_quality; 583 584 avctx->extradata= av_mallocz(8); 585 avctx->extradata_size=8; 586 ((uint32_t*)avctx->extradata)[0]= le2me_32(a->inv_qscale); 587 ((uint32_t*)avctx->extradata)[1]= le2me_32(AV_RL32("ASUS")); 588 589 for(i=0; i<64; i++){ 590 int q= 32*scale*ff_mpeg1_default_intra_matrix[i]; 591 a->q_intra_matrix[i]= ((a->inv_qscale<<16) + q/2) / q; 592 } 593 594 return 0; 595} 596#endif /* CONFIG_ASV1_ENCODER || CONFIG_ASV2_ENCODER */ 597 598static av_cold int decode_end(AVCodecContext *avctx){ 599 ASV1Context * const a = avctx->priv_data; 600 601 av_freep(&a->bitstream_buffer); 602 av_freep(&a->picture.qscale_table); 603 a->bitstream_buffer_size=0; 604 605 return 0; 606} 607 608AVCodec asv1_decoder = { 609 "asv1", 610 CODEC_TYPE_VIDEO, 611 CODEC_ID_ASV1, 612 sizeof(ASV1Context), 613 decode_init, 614 NULL, 615 decode_end, 616 decode_frame, 617 CODEC_CAP_DR1, 618 .long_name= NULL_IF_CONFIG_SMALL("ASUS V1"), 619}; 620 621AVCodec asv2_decoder = { 622 "asv2", 623 CODEC_TYPE_VIDEO, 624 CODEC_ID_ASV2, 625 sizeof(ASV1Context), 626 decode_init, 627 NULL, 628 decode_end, 629 decode_frame, 630 CODEC_CAP_DR1, 631 .long_name= NULL_IF_CONFIG_SMALL("ASUS V2"), 632}; 633 634#if CONFIG_ASV1_ENCODER 635AVCodec asv1_encoder = { 636 "asv1", 637 CODEC_TYPE_VIDEO, 638 CODEC_ID_ASV1, 639 sizeof(ASV1Context), 640 encode_init, 641 encode_frame, 642 //encode_end, 643 .pix_fmts= (enum PixelFormat[]){PIX_FMT_YUV420P, PIX_FMT_NONE}, 644 .long_name= NULL_IF_CONFIG_SMALL("ASUS V1"), 645}; 646#endif 647 648#if CONFIG_ASV2_ENCODER 649AVCodec asv2_encoder = { 650 "asv2", 651 CODEC_TYPE_VIDEO, 652 CODEC_ID_ASV2, 653 sizeof(ASV1Context), 654 encode_init, 655 encode_frame, 656 //encode_end, 657 .pix_fmts= (enum PixelFormat[]){PIX_FMT_YUV420P, PIX_FMT_NONE}, 658 .long_name= NULL_IF_CONFIG_SMALL("ASUS V2"), 659}; 660#endif 661