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FFmpeg/libavcodec/asv1.c

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  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