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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., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 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.     DECLARE_ALIGNED_8(DCTELEM, block[6][64]);

  48.     DECLARE_ALIGNED_8(uint16_t, intra_matrix[64]);

  49.     DECLARE_ALIGNED_8(int, q_intra_matrix[64]);

  50.     uint8_t *bitstream_buffer;

  51.     unsigned 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.         assert(i || ccp<8);

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

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

  295. 

  296.         if(ccp){

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

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

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

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

  301.         }

  302.     }

  303. }

  304. 

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

  306.     int i;

  307. 

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

  309. 

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

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

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

  313.                 return -1;

  314.         }

  315.     }else{

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

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

  318.                 return -1;

  319.         }

  320.     }

  321.     return 0;

  322. }

  323. 

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

  325.     int i;

  326. 

  327.     if(a->pb.buf_end - a->pb.buf - (put_bits_count(&a->pb)>>3) < 30*16*16*3/2/8){

  328.         av_log(a->avctx, AV_LOG_ERROR, "encoded frame too large\n");

  329.         return -1;

  330.     }

  331. 

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

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

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

  335.     }else{

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

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

  338.     }

  339.     return 0;

  340. }

  341. 

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

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

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

  345. 

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

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

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

  349. 

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

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

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

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

  354. 

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

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

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

  358.     }

  359. }

  360. 

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

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

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

  364.     int i;

  365. 

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

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

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

  369. 

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

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

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

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

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

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

  376. 

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

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

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

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

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

  382.     }

  383. }

  384. 

  385. static int decode_frame(AVCodecContext *avctx,

  386.                         void *data, int *data_size,

  387.                         uint8_t *buf, int buf_size)

  388. {

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

  390.     AVFrame *picture = data;

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

  392.     int mb_x, mb_y;

  393. 

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

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

  396. 

  397.     p->reference= 0;

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

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

  400.         return -1;

  401.     }

  402.     p->pict_type= I_TYPE;

  403.     p->key_frame= 1;

  404. 

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

  406. 

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

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

  409.     else{

  410.         int i;

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

  412.             a->bitstream_buffer[i]= ff_reverse[ buf[i] ];

  413.     }

  414. 

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

  416. 

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

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

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

  420.                 return -1;

  421. 

  422.             idct_put(a, mb_x, mb_y);

  423.         }

  424.     }

  425. 

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

  427.         mb_x= a->mb_width2;

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

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

  430.                 return -1;

  431. 

  432.             idct_put(a, mb_x, mb_y);

  433.         }

  434.     }

  435. 

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

  437.         mb_y= a->mb_height2;

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

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

  440.                 return -1;

  441. 

  442.             idct_put(a, mb_x, mb_y);

  443.         }

  444.     }

  445. #if 0

  446. int i;

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

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

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

  450. }

  451. 

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

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

  454. }

  455. #endif

  456. 

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

  458.     *data_size = sizeof(AVPicture);

  459. 

  460.     emms_c();

  461. 

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

  463. }

  464. 

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

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

  467.     AVFrame *pict = data;

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

  469.     int size;

  470.     int mb_x, mb_y;

  471. 

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

  473. 

  474.     *p = *pict;

  475.     p->pict_type= I_TYPE;

  476.     p->key_frame= 1;

  477. 

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

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

  480.             dct_get(a, mb_x, mb_y);

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

  482.         }

  483.     }

  484. 

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

  486.         mb_x= a->mb_width2;

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

  488.             dct_get(a, mb_x, mb_y);

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

  490.         }

  491.     }

  492. 

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

  494.         mb_y= a->mb_height2;

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

  496.             dct_get(a, mb_x, mb_y);

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

  498.         }

  499.     }

  500.     emms_c();

  501. 

  502.     align_put_bits(&a->pb);

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

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

  505. 

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

  507. 

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

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

  510.     else{

  511.         int i;

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

  513.             buf[i]= ff_reverse[ buf[i] ];

  514.     }

  515. 

  516.     return size*4;

  517. }

  518. 

  519. static void common_init(AVCodecContext *avctx){

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

  521. 

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

  523. 

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

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

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

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

  528. 

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

  530.     a->avctx= avctx;

  531. }

  532. 

  533. static int decode_init(AVCodecContext *avctx){

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

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

  536.     int i;

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

  538. 

  539.     common_init(avctx);

  540.     init_vlcs(a);

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

  542.     avctx->pix_fmt= PIX_FMT_YUV420P;

  543. 

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

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

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

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

  548.             a->inv_qscale= 6;

  549.         else

  550.             a->inv_qscale= 10;

  551.     }

  552. 

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

  554.         int index= scantab[i];

  555. 

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

  557.     }

  558. 

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

  560.     p->qscale_table= av_malloc( p->qstride * a->mb_height);

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

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

  563. 

  564.     return 0;

  565. }

  566. 

  567. static int encode_init(AVCodecContext *avctx){

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

  569.     int i;

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

  571. 

  572.     common_init(avctx);

  573. 

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

  575. 

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

  577. 

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

  579.     avctx->extradata_size=8;

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

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

  582. 

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

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

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

  586.     }

  587. 

  588.     return 0;

  589. }

  590. 

  591. static int decode_end(AVCodecContext *avctx){

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

  593. 

  594.     av_freep(&a->bitstream_buffer);

  595.     av_freep(&a->picture.qscale_table);

  596.     a->bitstream_buffer_size=0;

  597. 

  598.     return 0;

  599. }

  600. 

  601. AVCodec asv1_decoder = {

  602.     "asv1",

  603.     CODEC_TYPE_VIDEO,

  604.     CODEC_ID_ASV1,

  605.     sizeof(ASV1Context),

  606.     decode_init,

  607.     NULL,

  608.     decode_end,

  609.     decode_frame,

  610.     CODEC_CAP_DR1,

  611. };

  612. 

  613. AVCodec asv2_decoder = {

  614.     "asv2",

  615.     CODEC_TYPE_VIDEO,

  616.     CODEC_ID_ASV2,

  617.     sizeof(ASV1Context),

  618.     decode_init,

  619.     NULL,

  620.     decode_end,

  621.     decode_frame,

  622.     CODEC_CAP_DR1,

  623. };

  624. 

  625. #ifdef CONFIG_ENCODERS

  626. 

  627. AVCodec asv1_encoder = {

  628.     "asv1",

  629.     CODEC_TYPE_VIDEO,

  630.     CODEC_ID_ASV1,

  631.     sizeof(ASV1Context),

  632.     encode_init,

  633.     encode_frame,

  634.     //encode_end,

  635. };

  636. 

  637. AVCodec asv2_encoder = {

  638.     "asv2",

  639.     CODEC_TYPE_VIDEO,

  640.     CODEC_ID_ASV2,

  641.     sizeof(ASV1Context),

  642.     encode_init,

  643.     encode_frame,

  644.     //encode_end,

  645. };

  646. 

  647. #endif //CONFIG_ENCODERS