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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 reverse[256]={

  67. 0x00,0x80,0x40,0xC0,0x20,0xA0,0x60,0xE0,0x10,0x90,0x50,0xD0,0x30,0xB0,0x70,0xF0,

  68. 0x08,0x88,0x48,0xC8,0x28,0xA8,0x68,0xE8,0x18,0x98,0x58,0xD8,0x38,0xB8,0x78,0xF8,

  69. 0x04,0x84,0x44,0xC4,0x24,0xA4,0x64,0xE4,0x14,0x94,0x54,0xD4,0x34,0xB4,0x74,0xF4,

  70. 0x0C,0x8C,0x4C,0xCC,0x2C,0xAC,0x6C,0xEC,0x1C,0x9C,0x5C,0xDC,0x3C,0xBC,0x7C,0xFC,

  71. 0x02,0x82,0x42,0xC2,0x22,0xA2,0x62,0xE2,0x12,0x92,0x52,0xD2,0x32,0xB2,0x72,0xF2,

  72. 0x0A,0x8A,0x4A,0xCA,0x2A,0xAA,0x6A,0xEA,0x1A,0x9A,0x5A,0xDA,0x3A,0xBA,0x7A,0xFA,

  73. 0x06,0x86,0x46,0xC6,0x26,0xA6,0x66,0xE6,0x16,0x96,0x56,0xD6,0x36,0xB6,0x76,0xF6,

  74. 0x0E,0x8E,0x4E,0xCE,0x2E,0xAE,0x6E,0xEE,0x1E,0x9E,0x5E,0xDE,0x3E,0xBE,0x7E,0xFE,

  75. 0x01,0x81,0x41,0xC1,0x21,0xA1,0x61,0xE1,0x11,0x91,0x51,0xD1,0x31,0xB1,0x71,0xF1,

  76. 0x09,0x89,0x49,0xC9,0x29,0xA9,0x69,0xE9,0x19,0x99,0x59,0xD9,0x39,0xB9,0x79,0xF9,

  77. 0x05,0x85,0x45,0xC5,0x25,0xA5,0x65,0xE5,0x15,0x95,0x55,0xD5,0x35,0xB5,0x75,0xF5,

  78. 0x0D,0x8D,0x4D,0xCD,0x2D,0xAD,0x6D,0xED,0x1D,0x9D,0x5D,0xDD,0x3D,0xBD,0x7D,0xFD,

  79. 0x03,0x83,0x43,0xC3,0x23,0xA3,0x63,0xE3,0x13,0x93,0x53,0xD3,0x33,0xB3,0x73,0xF3,

  80. 0x0B,0x8B,0x4B,0xCB,0x2B,0xAB,0x6B,0xEB,0x1B,0x9B,0x5B,0xDB,0x3B,0xBB,0x7B,0xFB,

  81. 0x07,0x87,0x47,0xC7,0x27,0xA7,0x67,0xE7,0x17,0x97,0x57,0xD7,0x37,0xB7,0x77,0xF7,

  82. 0x0F,0x8F,0x4F,0xCF,0x2F,0xAF,0x6F,0xEF,0x1F,0x9F,0x5F,0xDF,0x3F,0xBF,0x7F,0xFF,

  83. };

  84. 

  85. static const uint8_t ccp_tab[17][2]={

  86.     {0x2,2}, {0x7,5}, {0xB,5}, {0x3,5},

  87.     {0xD,5}, {0x5,5}, {0x9,5}, {0x1,5},

  88.     {0xE,5}, {0x6,5}, {0xA,5}, {0x2,5}, 

  89.     {0xC,5}, {0x4,5}, {0x8,5}, {0x3,2},

  90.     {0xF,5}, //EOB

  91. };

  92. 

  93. static const uint8_t level_tab[7][2]={

  94.     {3,4}, {3,3}, {3,2}, {0,3}, {2,2}, {2,3}, {2,4}

  95. };

  96. 

  97. static const uint8_t dc_ccp_tab[8][2]={

  98.     {0x1,2}, {0xD,4}, {0xF,4}, {0xC,4},

  99.     {0x5,3}, {0xE,4}, {0x4,3}, {0x0,2},

  100. };

  101. 

  102. static const uint8_t ac_ccp_tab[16][2]={

  103.     {0x00,2}, {0x3B,6}, {0x0A,4}, {0x3A,6},

  104.     {0x02,3}, {0x39,6}, {0x3C,6}, {0x38,6},

  105.     {0x03,3}, {0x3D,6}, {0x08,4}, {0x1F,5},

  106.     {0x09,4}, {0x0B,4}, {0x0D,4}, {0x0C,4},

  107. };

  108. 

  109. static const uint8_t asv2_level_tab[63][2]={

  110.     {0x3F,10},{0x2F,10},{0x37,10},{0x27,10},{0x3B,10},{0x2B,10},{0x33,10},{0x23,10},

  111.     {0x3D,10},{0x2D,10},{0x35,10},{0x25,10},{0x39,10},{0x29,10},{0x31,10},{0x21,10},

  112.     {0x1F, 8},{0x17, 8},{0x1B, 8},{0x13, 8},{0x1D, 8},{0x15, 8},{0x19, 8},{0x11, 8},

  113.     {0x0F, 6},{0x0B, 6},{0x0D, 6},{0x09, 6},

  114.     {0x07, 4},{0x05, 4},

  115.     {0x03, 2},

  116.     {0x00, 5},

  117.     {0x02, 2},

  118.     {0x04, 4},{0x06, 4},

  119.     {0x08, 6},{0x0C, 6},{0x0A, 6},{0x0E, 6},

  120.     {0x10, 8},{0x18, 8},{0x14, 8},{0x1C, 8},{0x12, 8},{0x1A, 8},{0x16, 8},{0x1E, 8},

  121.     {0x20,10},{0x30,10},{0x28,10},{0x38,10},{0x24,10},{0x34,10},{0x2C,10},{0x3C,10},

  122.     {0x22,10},{0x32,10},{0x2A,10},{0x3A,10},{0x26,10},{0x36,10},{0x2E,10},{0x3E,10},

  123. };

  124. 

  125. 

  126. static VLC ccp_vlc;

  127. static VLC level_vlc;

  128. static VLC dc_ccp_vlc;

  129. static VLC ac_ccp_vlc;

  130. static VLC asv2_level_vlc;

  131. 

  132. static void init_vlcs(ASV1Context *a){

  133.     static int done = 0;

  134. 

  135.     if (!done) {

  136.         done = 1;

  137. 

  138.         init_vlc(&ccp_vlc, VLC_BITS, 17, 

  139.                  &ccp_tab[0][1], 2, 1,

  140.                  &ccp_tab[0][0], 2, 1);

  141.         init_vlc(&dc_ccp_vlc, VLC_BITS, 8, 

  142.                  &dc_ccp_tab[0][1], 2, 1,

  143.                  &dc_ccp_tab[0][0], 2, 1);

  144.         init_vlc(&ac_ccp_vlc, VLC_BITS, 16, 

  145.                  &ac_ccp_tab[0][1], 2, 1,

  146.                  &ac_ccp_tab[0][0], 2, 1);

  147.         init_vlc(&level_vlc,  VLC_BITS, 7, 

  148.                  &level_tab[0][1], 2, 1,

  149.                  &level_tab[0][0], 2, 1);

  150.         init_vlc(&asv2_level_vlc, ASV2_LEVEL_VLC_BITS, 63, 

  151.                  &asv2_level_tab[0][1], 2, 1,

  152.                  &asv2_level_tab[0][0], 2, 1);

  153.     }

  154. }

  155. 

  156. //FIXME write a reversed bitstream reader to avoid the double reverse

  157. static inline int asv2_get_bits(GetBitContext *gb, int n){

  158.     return reverse[ get_bits(gb, n) << (8-n) ];

  159. }

  160. 

  161. static inline void asv2_put_bits(PutBitContext *pb, int n, int v){

  162.     put_bits(pb, n, reverse[ v << (8-n) ]);

  163. }

  164. 

  165. static inline int asv1_get_level(GetBitContext *gb){

  166.     int code= get_vlc2(gb, level_vlc.table, VLC_BITS, 1);

  167. 

  168.     if(code==3) return get_sbits(gb, 8);

  169.     else        return code - 3;

  170. }

  171. 

  172. static inline int asv2_get_level(GetBitContext *gb){

  173.     int code= get_vlc2(gb, asv2_level_vlc.table, ASV2_LEVEL_VLC_BITS, 1);

  174. 

  175.     if(code==31) return (int8_t)asv2_get_bits(gb, 8);

  176.     else         return code - 31;

  177. }

  178. 

  179. static inline void asv1_put_level(PutBitContext *pb, int level){

  180.     unsigned int index= level + 3;

  181. 

  182.     if(index <= 6) put_bits(pb, level_tab[index][1], level_tab[index][0]);

  183.     else{

  184.         put_bits(pb, level_tab[3][1], level_tab[3][0]);

  185.         put_bits(pb, 8, level&0xFF);

  186.     }

  187. }

  188. 

  189. static inline void asv2_put_level(PutBitContext *pb, int level){

  190.     unsigned int index= level + 31;

  191. 

  192.     if(index <= 62) put_bits(pb, asv2_level_tab[index][1], asv2_level_tab[index][0]);

  193.     else{

  194.         put_bits(pb, asv2_level_tab[31][1], asv2_level_tab[31][0]);

  195.         asv2_put_bits(pb, 8, level&0xFF);

  196.     }

  197. }

  198. 

  199. static inline int asv1_decode_block(ASV1Context *a, DCTELEM block[64]){

  200.     int i;

  201. 

  202.     block[0]= 8*get_bits(&a->gb, 8);

  203.     

  204.     for(i=0; i<11; i++){

  205.         const int ccp= get_vlc2(&a->gb, ccp_vlc.table, VLC_BITS, 1);

  206. 

  207.         if(ccp){

  208.             if(ccp == 16) break;

  209.             if(ccp < 0 || i>=10){

  210.                 av_log(a->avctx, AV_LOG_ERROR, "coded coeff pattern damaged\n");

  211.                 return -1;

  212.             }

  213. 

  214.             if(ccp&8) block[a->scantable.permutated[4*i+0]]= (asv1_get_level(&a->gb) * a->intra_matrix[4*i+0])>>4;

  215.             if(ccp&4) block[a->scantable.permutated[4*i+1]]= (asv1_get_level(&a->gb) * a->intra_matrix[4*i+1])>>4;

  216.             if(ccp&2) block[a->scantable.permutated[4*i+2]]= (asv1_get_level(&a->gb) * a->intra_matrix[4*i+2])>>4;

  217.             if(ccp&1) block[a->scantable.permutated[4*i+3]]= (asv1_get_level(&a->gb) * a->intra_matrix[4*i+3])>>4;

  218.         }

  219.     }

  220. 

  221.     return 0;

  222. }

  223. 

  224. static inline int asv2_decode_block(ASV1Context *a, DCTELEM block[64]){

  225.     int i, count, ccp;

  226. 

  227.     count= asv2_get_bits(&a->gb, 4);

  228.     

  229.     block[0]= 8*asv2_get_bits(&a->gb, 8);

  230.     

  231.     ccp= get_vlc2(&a->gb, dc_ccp_vlc.table, VLC_BITS, 1);

  232.     if(ccp){

  233.         if(ccp&4) block[a->scantable.permutated[1]]= (asv2_get_level(&a->gb) * a->intra_matrix[1])>>4;

  234.         if(ccp&2) block[a->scantable.permutated[2]]= (asv2_get_level(&a->gb) * a->intra_matrix[2])>>4;

  235.         if(ccp&1) block[a->scantable.permutated[3]]= (asv2_get_level(&a->gb) * a->intra_matrix[3])>>4;

  236.     }

  237. 

  238.     for(i=1; i<count+1; i++){

  239.         const int ccp= get_vlc2(&a->gb, ac_ccp_vlc.table, VLC_BITS, 1);

  240. 

  241.         if(ccp){

  242.             if(ccp&8) block[a->scantable.permutated[4*i+0]]= (asv2_get_level(&a->gb) * a->intra_matrix[4*i+0])>>4;

  243.             if(ccp&4) block[a->scantable.permutated[4*i+1]]= (asv2_get_level(&a->gb) * a->intra_matrix[4*i+1])>>4;

  244.             if(ccp&2) block[a->scantable.permutated[4*i+2]]= (asv2_get_level(&a->gb) * a->intra_matrix[4*i+2])>>4;

  245.             if(ccp&1) block[a->scantable.permutated[4*i+3]]= (asv2_get_level(&a->gb) * a->intra_matrix[4*i+3])>>4;

  246.         }

  247.     }

  248.     

  249.     return 0;

  250. }

  251. 

  252. static inline void asv1_encode_block(ASV1Context *a, DCTELEM block[64]){

  253.     int i;

  254.     int nc_count=0;

  255.     

  256.     put_bits(&a->pb, 8, (block[0] + 32)>>6);

  257.     block[0]= 0;

  258.     

  259.     for(i=0; i<10; i++){

  260.         const int index= scantab[4*i];

  261.         int ccp=0;

  262. 

  263.         if( (block[index + 0] = (block[index + 0]*a->q_intra_matrix[index + 0] + (1<<15))>>16) ) ccp |= 8;

  264.         if( (block[index + 8] = (block[index + 8]*a->q_intra_matrix[index + 8] + (1<<15))>>16) ) ccp |= 4;

  265.         if( (block[index + 1] = (block[index + 1]*a->q_intra_matrix[index + 1] + (1<<15))>>16) ) ccp |= 2;

  266.         if( (block[index + 9] = (block[index + 9]*a->q_intra_matrix[index + 9] + (1<<15))>>16) ) ccp |= 1;

  267. 

  268.         if(ccp){

  269.             for(;nc_count; nc_count--) 

  270.                 put_bits(&a->pb, ccp_tab[0][1], ccp_tab[0][0]);

  271. 

  272.             put_bits(&a->pb, ccp_tab[ccp][1], ccp_tab[ccp][0]);

  273.             

  274.             if(ccp&8) asv1_put_level(&a->pb, block[index + 0]);

  275.             if(ccp&4) asv1_put_level(&a->pb, block[index + 8]);

  276.             if(ccp&2) asv1_put_level(&a->pb, block[index + 1]);

  277.             if(ccp&1) asv1_put_level(&a->pb, block[index + 9]);

  278.         }else{

  279.             nc_count++;

  280.         }

  281.     }

  282.     put_bits(&a->pb, ccp_tab[16][1], ccp_tab[16][0]);

  283. }

  284. 

  285. static inline void asv2_encode_block(ASV1Context *a, DCTELEM block[64]){

  286.     int i;

  287.     int count=0;

  288.     

  289.     for(count=63; count>3; count--){

  290.         const int index= scantab[count];

  291. 

  292.         if( (block[index]*a->q_intra_matrix[index] + (1<<15))>>16 ) 

  293.             break;

  294.     }

  295.     

  296.     count >>= 2;

  297. 

  298.     asv2_put_bits(&a->pb, 4, count);

  299.     asv2_put_bits(&a->pb, 8, (block[0] + 32)>>6);

  300.     block[0]= 0;

  301.     

  302.     for(i=0; i<=count; i++){

  303.         const int index= scantab[4*i];

  304.         int ccp=0;

  305. 

  306.         if( (block[index + 0] = (block[index + 0]*a->q_intra_matrix[index + 0] + (1<<15))>>16) ) ccp |= 8;

  307.         if( (block[index + 8] = (block[index + 8]*a->q_intra_matrix[index + 8] + (1<<15))>>16) ) ccp |= 4;

  308.         if( (block[index + 1] = (block[index + 1]*a->q_intra_matrix[index + 1] + (1<<15))>>16) ) ccp |= 2;

  309.         if( (block[index + 9] = (block[index + 9]*a->q_intra_matrix[index + 9] + (1<<15))>>16) ) ccp |= 1;

  310. 

  311.         if(i) put_bits(&a->pb, ac_ccp_tab[ccp][1], ac_ccp_tab[ccp][0]);

  312.         else  put_bits(&a->pb, dc_ccp_tab[ccp][1], dc_ccp_tab[ccp][0]);

  313. 

  314.         if(ccp){

  315.             if(ccp&8) asv2_put_level(&a->pb, block[index + 0]);

  316.             if(ccp&4) asv2_put_level(&a->pb, block[index + 8]);

  317.             if(ccp&2) asv2_put_level(&a->pb, block[index + 1]);

  318.             if(ccp&1) asv2_put_level(&a->pb, block[index + 9]);

  319.         }

  320.     }

  321. }

  322. 

  323. static inline int decode_mb(ASV1Context *a, DCTELEM block[6][64]){

  324.     int i;

  325. 

  326.     a->dsp.clear_blocks(block[0]);

  327.     

  328.     if(a->avctx->codec_id == CODEC_ID_ASV1){

  329.         for(i=0; i<6; i++){

  330.             if( asv1_decode_block(a, block[i]) < 0) 

  331.                 return -1;

  332.         }

  333.     }else{

  334.         for(i=0; i<6; i++){

  335.             if( asv2_decode_block(a, block[i]) < 0) 

  336.                 return -1;

  337.         }

  338.     }

  339.     return 0;

  340. }

  341. 

  342. static inline void encode_mb(ASV1Context *a, DCTELEM block[6][64]){

  343.     int i;

  344. 

  345.     if(a->avctx->codec_id == CODEC_ID_ASV1){

  346.         for(i=0; i<6; i++)

  347.             asv1_encode_block(a, block[i]);

  348.     }else{

  349.         for(i=0; i<6; i++)

  350.             asv2_encode_block(a, block[i]);

  351.     }

  352. }

  353. 

  354. static inline void idct_put(ASV1Context *a, int mb_x, int mb_y){

  355.     DCTELEM (*block)[64]= a->block;

  356.     int linesize= a->picture.linesize[0];

  357.     

  358.     uint8_t *dest_y  = a->picture.data[0] + (mb_y * 16* linesize              ) + mb_x * 16;

  359.     uint8_t *dest_cb = a->picture.data[1] + (mb_y * 8 * a->picture.linesize[1]) + mb_x * 8;

  360.     uint8_t *dest_cr = a->picture.data[2] + (mb_y * 8 * a->picture.linesize[2]) + mb_x * 8;

  361. 

  362.     a->dsp.idct_put(dest_y                 , linesize, block[0]);

  363.     a->dsp.idct_put(dest_y              + 8, linesize, block[1]);

  364.     a->dsp.idct_put(dest_y + 8*linesize    , linesize, block[2]);

  365.     a->dsp.idct_put(dest_y + 8*linesize + 8, linesize, block[3]);

  366. 

  367.     if(!(a->avctx->flags&CODEC_FLAG_GRAY)){

  368.         a->dsp.idct_put(dest_cb, a->picture.linesize[1], block[4]);

  369.         a->dsp.idct_put(dest_cr, a->picture.linesize[2], block[5]);

  370.     }

  371. }

  372. 

  373. static inline void dct_get(ASV1Context *a, int mb_x, int mb_y){

  374.     DCTELEM (*block)[64]= a->block;

  375.     int linesize= a->picture.linesize[0];

  376.     int i;

  377.     

  378.     uint8_t *ptr_y  = a->picture.data[0] + (mb_y * 16* linesize              ) + mb_x * 16;

  379.     uint8_t *ptr_cb = a->picture.data[1] + (mb_y * 8 * a->picture.linesize[1]) + mb_x * 8;

  380.     uint8_t *ptr_cr = a->picture.data[2] + (mb_y * 8 * a->picture.linesize[2]) + mb_x * 8;

  381. 

  382.     a->dsp.get_pixels(block[0], ptr_y                 , linesize);

  383.     a->dsp.get_pixels(block[1], ptr_y              + 8, linesize);

  384.     a->dsp.get_pixels(block[2], ptr_y + 8*linesize    , linesize);

  385.     a->dsp.get_pixels(block[3], ptr_y + 8*linesize + 8, linesize);

  386.     for(i=0; i<4; i++)

  387.         a->dsp.fdct(block[i]);

  388.     

  389.     if(!(a->avctx->flags&CODEC_FLAG_GRAY)){

  390.         a->dsp.get_pixels(block[4], ptr_cb, a->picture.linesize[1]);

  391.         a->dsp.get_pixels(block[5], ptr_cr, a->picture.linesize[2]);

  392.         for(i=4; i<6; i++)

  393.             a->dsp.fdct(block[i]);

  394.     }

  395. }

  396. 

  397. static int decode_frame(AVCodecContext *avctx, 

  398.                         void *data, int *data_size,

  399.                         uint8_t *buf, int buf_size)

  400. {

  401.     ASV1Context * const a = avctx->priv_data;

  402.     AVFrame *picture = data;

  403.     AVFrame * const p= (AVFrame*)&a->picture;

  404.     int mb_x, mb_y;

  405. 

  406.     /* special case for last picture */

  407.     if (buf_size == 0) {

  408.         return 0;

  409.     }

  410. 

  411.     if(p->data[0])

  412.         avctx->release_buffer(avctx, p);

  413. 

  414.     p->reference= 0;

  415.     if(avctx->get_buffer(avctx, p) < 0){

  416.         av_log(avctx, AV_LOG_ERROR, "get_buffer() failed\n");

  417.         return -1;

  418.     }

  419.     p->pict_type= I_TYPE;

  420.     p->key_frame= 1;

  421. 

  422.     a->bitstream_buffer= av_fast_realloc(a->bitstream_buffer, &a->bitstream_buffer_size, buf_size + FF_INPUT_BUFFER_PADDING_SIZE);

  423.     

  424.     if(avctx->codec_id == CODEC_ID_ASV1)

  425.         a->dsp.bswap_buf((uint32_t*)a->bitstream_buffer, (uint32_t*)buf, buf_size/4);

  426.     else{

  427.         int i;

  428.         for(i=0; i<buf_size; i++)

  429.             a->bitstream_buffer[i]= reverse[ buf[i] ];

  430.     }

  431. 

  432.     init_get_bits(&a->gb, a->bitstream_buffer, buf_size*8);

  433. 

  434.     for(mb_y=0; mb_y<a->mb_height2; mb_y++){

  435.         for(mb_x=0; mb_x<a->mb_width2; mb_x++){

  436.             if( decode_mb(a, a->block) <0)

  437.                 return -1;

  438.              

  439.             idct_put(a, mb_x, mb_y);

  440.         }

  441.     }

  442. 

  443.     if(a->mb_width2 != a->mb_width){

  444.         mb_x= a->mb_width2;

  445.         for(mb_y=0; mb_y<a->mb_height2; mb_y++){

  446.             if( decode_mb(a, a->block) <0)

  447.                 return -1;

  448.              

  449.             idct_put(a, mb_x, mb_y);

  450.         }

  451.     }

  452. 

  453.     if(a->mb_height2 != a->mb_height){

  454.         mb_y= a->mb_height2;

  455.         for(mb_x=0; mb_x<a->mb_width; mb_x++){

  456.             if( decode_mb(a, a->block) <0)

  457.                 return -1;

  458.              

  459.             idct_put(a, mb_x, mb_y);

  460.         }

  461.     }

  462. #if 0    

  463. int i;

  464. printf("%d %d\n", 8*buf_size, get_bits_count(&a->gb));

  465. for(i=get_bits_count(&a->gb); i<8*buf_size; i++){

  466.     printf("%d", get_bits1(&a->gb));

  467. }

  468. 

  469. for(i=0; i<s->avctx->extradata_size; i++){

  470.     printf("%c\n", ((uint8_t*)s->avctx->extradata)[i]);

  471. }

  472. #endif

  473. 

  474.     *picture= *(AVFrame*)&a->picture;

  475.     *data_size = sizeof(AVPicture);

  476. 

  477.     emms_c();

  478.     

  479.     return (get_bits_count(&a->gb)+31)/32*4;

  480. }

  481. 

  482. static int encode_frame(AVCodecContext *avctx, unsigned char *buf, int buf_size, void *data){

  483.     ASV1Context * const a = avctx->priv_data;

  484.     AVFrame *pict = data;

  485.     AVFrame * const p= (AVFrame*)&a->picture;

  486.     int size;

  487.     int mb_x, mb_y;

  488. 

  489.     init_put_bits(&a->pb, buf, buf_size);

  490.     

  491.     *p = *pict;

  492.     p->pict_type= I_TYPE;

  493.     p->key_frame= 1;

  494. 

  495.     for(mb_y=0; mb_y<a->mb_height2; mb_y++){

  496.         for(mb_x=0; mb_x<a->mb_width2; mb_x++){

  497.             dct_get(a, mb_x, mb_y);

  498.             encode_mb(a, a->block);

  499.         }

  500.     }

  501. 

  502.     if(a->mb_width2 != a->mb_width){

  503.         mb_x= a->mb_width2;

  504.         for(mb_y=0; mb_y<a->mb_height2; mb_y++){

  505.             dct_get(a, mb_x, mb_y);

  506.             encode_mb(a, a->block);

  507.         }

  508.     }

  509. 

  510.     if(a->mb_height2 != a->mb_height){

  511.         mb_y= a->mb_height2;

  512.         for(mb_x=0; mb_x<a->mb_width; mb_x++){

  513.             dct_get(a, mb_x, mb_y);

  514.             encode_mb(a, a->block);

  515.         }

  516.     }

  517.     emms_c();

  518.     

  519.     align_put_bits(&a->pb);

  520.     while(put_bits_count(&a->pb)&31)

  521.         put_bits(&a->pb, 8, 0);

  522.     

  523.     size= put_bits_count(&a->pb)/32;

  524.     

  525.     if(avctx->codec_id == CODEC_ID_ASV1)

  526.         a->dsp.bswap_buf((uint32_t*)buf, (uint32_t*)buf, size);

  527.     else{

  528.         int i;

  529.         for(i=0; i<4*size; i++)

  530.             buf[i]= reverse[ buf[i] ];

  531.     }

  532.     

  533.     return size*4;

  534. }

  535. 

  536. static void common_init(AVCodecContext *avctx){

  537.     ASV1Context * const a = avctx->priv_data;

  538. 

  539.     dsputil_init(&a->dsp, avctx);

  540. 

  541.     a->mb_width   = (avctx->width  + 15) / 16;

  542.     a->mb_height  = (avctx->height + 15) / 16;

  543.     a->mb_width2  = (avctx->width  + 0) / 16;

  544.     a->mb_height2 = (avctx->height + 0) / 16;

  545. 

  546.     avctx->coded_frame= (AVFrame*)&a->picture;

  547.     a->avctx= avctx;

  548. }

  549. 

  550. static int decode_init(AVCodecContext *avctx){

  551.     ASV1Context * const a = avctx->priv_data;

  552.     AVFrame *p= (AVFrame*)&a->picture;

  553.     int i;

  554.     const int scale= avctx->codec_id == CODEC_ID_ASV1 ? 1 : 2;

  555.  

  556.     common_init(avctx);

  557.     init_vlcs(a);

  558.     ff_init_scantable(a->dsp.idct_permutation, &a->scantable, scantab);

  559. 

  560.     a->inv_qscale= ((uint8_t*)avctx->extradata)[0];

  561.     if(a->inv_qscale == 0){

  562.         av_log(avctx, AV_LOG_ERROR, "illegal qscale 0\n");

  563.         if(avctx->codec_id == CODEC_ID_ASV1)

  564.             a->inv_qscale= 6;

  565.         else

  566.             a->inv_qscale= 10;

  567.     }

  568. 

  569.     for(i=0; i<64; i++){

  570.         int index= scantab[i];

  571. 

  572.         a->intra_matrix[i]= 64*scale*ff_mpeg1_default_intra_matrix[index] / a->inv_qscale;

  573.     }

  574. 

  575.     p->qstride= a->mb_width;

  576.     p->qscale_table= av_mallocz( p->qstride * a->mb_height);

  577.     p->quality= (32*scale + a->inv_qscale/2)/a->inv_qscale;

  578.     memset(p->qscale_table, p->quality, p->qstride*a->mb_height);

  579. 

  580.     return 0;

  581. }

  582. 

  583. static int encode_init(AVCodecContext *avctx){

  584.     ASV1Context * const a = avctx->priv_data;

  585.     int i;

  586.     const int scale= avctx->codec_id == CODEC_ID_ASV1 ? 1 : 2;

  587. 

  588.     common_init(avctx);

  589.     

  590.     if(avctx->global_quality == 0) avctx->global_quality= 4*FF_QUALITY_SCALE;

  591. 

  592.     a->inv_qscale= (32*scale*FF_QUALITY_SCALE +  avctx->global_quality/2) / avctx->global_quality;

  593.     

  594.     avctx->extradata= av_mallocz(8);

  595.     avctx->extradata_size=8;

  596.     ((uint32_t*)avctx->extradata)[0]= le2me_32(a->inv_qscale);

  597.     ((uint32_t*)avctx->extradata)[1]= le2me_32(ff_get_fourcc("ASUS"));

  598.     

  599.     for(i=0; i<64; i++){

  600.         int q= 32*scale*ff_mpeg1_default_intra_matrix[i];

  601.         a->q_intra_matrix[i]= ((a->inv_qscale<<16) + q/2) / q;

  602.     }

  603. 

  604.     return 0;

  605. }

  606. 

  607. static 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.     return 0;

  615. }

  616. 

  617. AVCodec asv1_decoder = {

  618.     "asv1",

  619.     CODEC_TYPE_VIDEO,

  620.     CODEC_ID_ASV1,

  621.     sizeof(ASV1Context),

  622.     decode_init,

  623.     NULL,

  624.     decode_end,

  625.     decode_frame,

  626.     CODEC_CAP_DR1,

  627. };

  628. 

  629. AVCodec asv2_decoder = {

  630.     "asv2",

  631.     CODEC_TYPE_VIDEO,

  632.     CODEC_ID_ASV2,

  633.     sizeof(ASV1Context),

  634.     decode_init,

  635.     NULL,

  636.     decode_end,

  637.     decode_frame,

  638.     CODEC_CAP_DR1,

  639. };

  640. 

  641. #ifdef CONFIG_ENCODERS

  642. 

  643. AVCodec asv1_encoder = {

  644.     "asv1",

  645.     CODEC_TYPE_VIDEO,

  646.     CODEC_ID_ASV1,

  647.     sizeof(ASV1Context),

  648.     encode_init,

  649.     encode_frame,

  650.     //encode_end,

  651. };

  652. 

  653. AVCodec asv2_encoder = {

  654.     "asv2",

  655.     CODEC_TYPE_VIDEO,

  656.     CODEC_ID_ASV2,

  657.     sizeof(ASV1Context),

  658.     encode_init,

  659.     encode_frame,

  660.     //encode_end,

  661. };

  662. 

  663. #endif //CONFIG_ENCODERS