libavcodec/asv1.c

   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 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
  38 typedef 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
  57 static 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
  69 static 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
  77 static const uint8_t level_tab[7][2]={
  78     {3,4}, {3,3}, {3,2}, {0,3}, {2,2}, {2,3}, {2,4}
  79 };
  80
  81 static 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
  86 static 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
  93 static 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
 110 static VLC ccp_vlc;
 111 static VLC level_vlc;
 112 static VLC dc_ccp_vlc;
 113 static VLC ac_ccp_vlc;
 114 static VLC asv2_level_vlc;
 115
 116 static 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
 141 static inline int asv2_get_bits(GetBitContext *gb, int n){
 142     return ff_reverse[ get_bits(gb, n) << (8-n) ];
 143 }
 144
 145 static inline void asv2_put_bits(PutBitContext *pb, int n, int v){
 146     put_bits(pb, n, ff_reverse[ v << (8-n) ]);
 147 }
 148
 149 static 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
 156 static 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
 163 static 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_bits(pb, 8, level&0xFF);
 170     }
 171 }
 172
 173 static 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
 183 static 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
 208 static 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
 236 static 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
 269 static 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
 308 static 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
 327 static 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
 345 static 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
 364 static 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
 388 static 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
 449 int i;
 450 printf("%d %d\n", 8*buf_size, get_bits_count(&a->gb));
 451 for(i=get_bits_count(&a->gb); i<8*buf_size; i++){
 452     printf("%d", get_bits1(&a->gb));
 453 }
 454
 455 for(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 #ifdef CONFIG_ENCODERS
 469 static 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_ENCODERS */
 523
 524 static 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
 538 static 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 #ifdef CONFIG_ENCODERS
 573 static 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(ff_get_fourcc("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
 597
 598 static 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
 608 AVCodec 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= "ASUS V1",
 619 };
 620
 621 AVCodec 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= "ASUS V2",
 632 };
 633
 634 #ifdef CONFIG_ENCODERS
 635
 636 AVCodec asv1_encoder = {
 637     "asv1",
 638     CODEC_TYPE_VIDEO,
 639     CODEC_ID_ASV1,
 640     sizeof(ASV1Context),
 641     encode_init,
 642     encode_frame,
 643     //encode_end,
 644     .pix_fmts= (enum PixelFormat[]){PIX_FMT_YUV420P, PIX_FMT_NONE},
 645     .long_name= "ASUS V1",
 646 };
 647
 648 AVCodec asv2_encoder = {
 649     "asv2",
 650     CODEC_TYPE_VIDEO,
 651     CODEC_ID_ASV2,
 652     sizeof(ASV1Context),
 653     encode_init,
 654     encode_frame,
 655     //encode_end,
 656     .pix_fmts= (enum PixelFormat[]){PIX_FMT_YUV420P, PIX_FMT_NONE},
 657     .long_name= "ASUS V2",
 658 };
 659
 660 #endif //CONFIG_ENCODERS