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 libavcodec/asv1.c
  24  * ASUS V1/V2 codec.
  25  */
  26
  27 #include "avcodec.h"
  28 #include "get_bits.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 ff_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, ff_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 static inline int encode_mb(ASV1Context *a, DCTELEM block[6][64]){
 329     int i;
 330
 331     if(a->pb.buf_end - a->pb.buf - (put_bits_count(&a->pb)>>3) < 30*16*16*3/2/8){
 332         av_log(a->avctx, AV_LOG_ERROR, "encoded frame too large\n");
 333         return -1;
 334     }
 335
 336     if(a->avctx->codec_id == CODEC_ID_ASV1){
 337         for(i=0; i<6; i++)
 338             asv1_encode_block(a, block[i]);
 339     }else{
 340         for(i=0; i<6; i++)
 341             asv2_encode_block(a, block[i]);
 342     }
 343     return 0;
 344 }
 345
 346 static inline void idct_put(ASV1Context *a, int mb_x, int mb_y){
 347     DCTELEM (*block)[64]= a->block;
 348     int linesize= a->picture.linesize[0];
 349
 350     uint8_t *dest_y  = a->picture.data[0] + (mb_y * 16* linesize              ) + mb_x * 16;
 351     uint8_t *dest_cb = a->picture.data[1] + (mb_y * 8 * a->picture.linesize[1]) + mb_x * 8;
 352     uint8_t *dest_cr = a->picture.data[2] + (mb_y * 8 * a->picture.linesize[2]) + mb_x * 8;
 353
 354     a->dsp.idct_put(dest_y                 , linesize, block[0]);
 355     a->dsp.idct_put(dest_y              + 8, linesize, block[1]);
 356     a->dsp.idct_put(dest_y + 8*linesize    , linesize, block[2]);
 357     a->dsp.idct_put(dest_y + 8*linesize + 8, linesize, block[3]);
 358
 359     if(!(a->avctx->flags&CODEC_FLAG_GRAY)){
 360         a->dsp.idct_put(dest_cb, a->picture.linesize[1], block[4]);
 361         a->dsp.idct_put(dest_cr, a->picture.linesize[2], block[5]);
 362     }
 363 }
 364
 365 static inline void dct_get(ASV1Context *a, int mb_x, int mb_y){
 366     DCTELEM (*block)[64]= a->block;
 367     int linesize= a->picture.linesize[0];
 368     int i;
 369
 370     uint8_t *ptr_y  = a->picture.data[0] + (mb_y * 16* linesize              ) + mb_x * 16;
 371     uint8_t *ptr_cb = a->picture.data[1] + (mb_y * 8 * a->picture.linesize[1]) + mb_x * 8;
 372     uint8_t *ptr_cr = a->picture.data[2] + (mb_y * 8 * a->picture.linesize[2]) + mb_x * 8;
 373
 374     a->dsp.get_pixels(block[0], ptr_y                 , linesize);
 375     a->dsp.get_pixels(block[1], ptr_y              + 8, linesize);
 376     a->dsp.get_pixels(block[2], ptr_y + 8*linesize    , linesize);
 377     a->dsp.get_pixels(block[3], ptr_y + 8*linesize + 8, linesize);
 378     for(i=0; i<4; i++)
 379         a->dsp.fdct(block[i]);
 380
 381     if(!(a->avctx->flags&CODEC_FLAG_GRAY)){
 382         a->dsp.get_pixels(block[4], ptr_cb, a->picture.linesize[1]);
 383         a->dsp.get_pixels(block[5], ptr_cr, a->picture.linesize[2]);
 384         for(i=4; i<6; i++)
 385             a->dsp.fdct(block[i]);
 386     }
 387 }
 388
 389 static int decode_frame(AVCodecContext *avctx,
 390                         void *data, int *data_size,
 391                         AVPacket *avpkt)
 392 {
 393     const uint8_t *buf = avpkt->data;
 394     int buf_size = avpkt->size;
 395     ASV1Context * const a = avctx->priv_data;
 396     AVFrame *picture = data;
 397     AVFrame * const p= (AVFrame*)&a->picture;
 398     int mb_x, mb_y;
 399
 400     if(p->data[0])
 401         avctx->release_buffer(avctx, p);
 402
 403     p->reference= 0;
 404     if(avctx->get_buffer(avctx, p) < 0){
 405         av_log(avctx, AV_LOG_ERROR, "get_buffer() failed\n");
 406         return -1;
 407     }
 408     p->pict_type= FF_I_TYPE;
 409     p->key_frame= 1;
 410
 411     av_fast_malloc(&a->bitstream_buffer, &a->bitstream_buffer_size, buf_size + FF_INPUT_BUFFER_PADDING_SIZE);
 412     if (!a->bitstream_buffer)
 413         return AVERROR(ENOMEM);
 414
 415     if(avctx->codec_id == CODEC_ID_ASV1)
 416         a->dsp.bswap_buf((uint32_t*)a->bitstream_buffer, (const uint32_t*)buf, buf_size/4);
 417     else{
 418         int i;
 419         for(i=0; i<buf_size; i++)
 420             a->bitstream_buffer[i]= ff_reverse[ buf[i] ];
 421     }
 422
 423     init_get_bits(&a->gb, a->bitstream_buffer, buf_size*8);
 424
 425     for(mb_y=0; mb_y<a->mb_height2; mb_y++){
 426         for(mb_x=0; mb_x<a->mb_width2; mb_x++){
 427             if( decode_mb(a, a->block) <0)
 428                 return -1;
 429
 430             idct_put(a, mb_x, mb_y);
 431         }
 432     }
 433
 434     if(a->mb_width2 != a->mb_width){
 435         mb_x= a->mb_width2;
 436         for(mb_y=0; mb_y<a->mb_height2; mb_y++){
 437             if( decode_mb(a, a->block) <0)
 438                 return -1;
 439
 440             idct_put(a, mb_x, mb_y);
 441         }
 442     }
 443
 444     if(a->mb_height2 != a->mb_height){
 445         mb_y= a->mb_height2;
 446         for(mb_x=0; mb_x<a->mb_width; mb_x++){
 447             if( decode_mb(a, a->block) <0)
 448                 return -1;
 449
 450             idct_put(a, mb_x, mb_y);
 451         }
 452     }
 453 #if 0
 454 int i;
 455 printf("%d %d\n", 8*buf_size, get_bits_count(&a->gb));
 456 for(i=get_bits_count(&a->gb); i<8*buf_size; i++){
 457     printf("%d", get_bits1(&a->gb));
 458 }
 459
 460 for(i=0; i<s->avctx->extradata_size; i++){
 461     printf("%c\n", ((uint8_t*)s->avctx->extradata)[i]);
 462 }
 463 #endif
 464
 465     *picture= *(AVFrame*)&a->picture;
 466     *data_size = sizeof(AVPicture);
 467
 468     emms_c();
 469
 470     return (get_bits_count(&a->gb)+31)/32*4;
 471 }
 472
 473 #if CONFIG_ASV1_ENCODER || CONFIG_ASV2_ENCODER
 474 static int encode_frame(AVCodecContext *avctx, unsigned char *buf, int buf_size, void *data){
 475     ASV1Context * const a = avctx->priv_data;
 476     AVFrame *pict = data;
 477     AVFrame * const p= (AVFrame*)&a->picture;
 478     int size;
 479     int mb_x, mb_y;
 480
 481     init_put_bits(&a->pb, buf, buf_size);
 482
 483     *p = *pict;
 484     p->pict_type= FF_I_TYPE;
 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     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*)buf, (uint32_t*)buf, size);
 519     else{
 520         int i;
 521         for(i=0; i<4*size; i++)
 522             buf[i]= ff_reverse[ buf[i] ];
 523     }
 524
 525     return size*4;
 526 }
 527 #endif /* CONFIG_ASV1_ENCODER || CONFIG_ASV2_ENCODER */
 528
 529 static av_cold void common_init(AVCodecContext *avctx){
 530     ASV1Context * const a = avctx->priv_data;
 531
 532     dsputil_init(&a->dsp, avctx);
 533
 534     a->mb_width   = (avctx->width  + 15) / 16;
 535     a->mb_height  = (avctx->height + 15) / 16;
 536     a->mb_width2  = (avctx->width  + 0) / 16;
 537     a->mb_height2 = (avctx->height + 0) / 16;
 538
 539     avctx->coded_frame= (AVFrame*)&a->picture;
 540     a->avctx= avctx;
 541 }
 542
 543 static av_cold int decode_init(AVCodecContext *avctx){
 544     ASV1Context * const a = avctx->priv_data;
 545     AVFrame *p= (AVFrame*)&a->picture;
 546     int i;
 547     const int scale= avctx->codec_id == CODEC_ID_ASV1 ? 1 : 2;
 548
 549     common_init(avctx);
 550     init_vlcs(a);
 551     ff_init_scantable(a->dsp.idct_permutation, &a->scantable, scantab);
 552     avctx->pix_fmt= PIX_FMT_YUV420P;
 553
 554     a->inv_qscale= ((uint8_t*)avctx->extradata)[0];
 555     if(a->inv_qscale == 0){
 556         av_log(avctx, AV_LOG_ERROR, "illegal qscale 0\n");
 557         if(avctx->codec_id == CODEC_ID_ASV1)
 558             a->inv_qscale= 6;
 559         else
 560             a->inv_qscale= 10;
 561     }
 562
 563     for(i=0; i<64; i++){
 564         int index= scantab[i];
 565
 566         a->intra_matrix[i]= 64*scale*ff_mpeg1_default_intra_matrix[index] / a->inv_qscale;
 567     }
 568
 569     p->qstride= a->mb_width;
 570     p->qscale_table= av_malloc( p->qstride * a->mb_height);
 571     p->quality= (32*scale + a->inv_qscale/2)/a->inv_qscale;
 572     memset(p->qscale_table, p->quality, p->qstride*a->mb_height);
 573
 574     return 0;
 575 }
 576
 577 #if CONFIG_ASV1_ENCODER || CONFIG_ASV2_ENCODER
 578 static av_cold int encode_init(AVCodecContext *avctx){
 579     ASV1Context * const a = avctx->priv_data;
 580     int i;
 581     const int scale= avctx->codec_id == CODEC_ID_ASV1 ? 1 : 2;
 582
 583     common_init(avctx);
 584
 585     if(avctx->global_quality == 0) avctx->global_quality= 4*FF_QUALITY_SCALE;
 586
 587     a->inv_qscale= (32*scale*FF_QUALITY_SCALE +  avctx->global_quality/2) / avctx->global_quality;
 588
 589     avctx->extradata= av_mallocz(8);
 590     avctx->extradata_size=8;
 591     ((uint32_t*)avctx->extradata)[0]= le2me_32(a->inv_qscale);
 592     ((uint32_t*)avctx->extradata)[1]= le2me_32(AV_RL32("ASUS"));
 593
 594     for(i=0; i<64; i++){
 595         int q= 32*scale*ff_mpeg1_default_intra_matrix[i];
 596         a->q_intra_matrix[i]= ((a->inv_qscale<<16) + q/2) / q;
 597     }
 598
 599     return 0;
 600 }
 601 #endif /* CONFIG_ASV1_ENCODER || CONFIG_ASV2_ENCODER */
 602
 603 static av_cold int decode_end(AVCodecContext *avctx){
 604     ASV1Context * const a = avctx->priv_data;
 605
 606     av_freep(&a->bitstream_buffer);
 607     av_freep(&a->picture.qscale_table);
 608     a->bitstream_buffer_size=0;
 609
 610     return 0;
 611 }
 612
 613 AVCodec asv1_decoder = {
 614     "asv1",
 615     CODEC_TYPE_VIDEO,
 616     CODEC_ID_ASV1,
 617     sizeof(ASV1Context),
 618     decode_init,
 619     NULL,
 620     decode_end,
 621     decode_frame,
 622     CODEC_CAP_DR1,
 623     .long_name= NULL_IF_CONFIG_SMALL("ASUS V1"),
 624 };
 625
 626 AVCodec asv2_decoder = {
 627     "asv2",
 628     CODEC_TYPE_VIDEO,
 629     CODEC_ID_ASV2,
 630     sizeof(ASV1Context),
 631     decode_init,
 632     NULL,
 633     decode_end,
 634     decode_frame,
 635     CODEC_CAP_DR1,
 636     .long_name= NULL_IF_CONFIG_SMALL("ASUS V2"),
 637 };
 638
 639 #if CONFIG_ASV1_ENCODER
 640 AVCodec asv1_encoder = {
 641     "asv1",
 642     CODEC_TYPE_VIDEO,
 643     CODEC_ID_ASV1,
 644     sizeof(ASV1Context),
 645     encode_init,
 646     encode_frame,
 647     //encode_end,
 648     .pix_fmts= (const enum PixelFormat[]){PIX_FMT_YUV420P, PIX_FMT_NONE},
 649     .long_name= NULL_IF_CONFIG_SMALL("ASUS V1"),
 650 };
 651 #endif
 652
 653 #if CONFIG_ASV2_ENCODER
 654 AVCodec asv2_encoder = {
 655     "asv2",
 656     CODEC_TYPE_VIDEO,
 657     CODEC_ID_ASV2,
 658     sizeof(ASV1Context),
 659     encode_init,
 660     encode_frame,
 661     //encode_end,
 662     .pix_fmts= (const enum PixelFormat[]){PIX_FMT_YUV420P, PIX_FMT_NONE},
 663     .long_name= NULL_IF_CONFIG_SMALL("ASUS V2"),
 664 };
 665 #endif