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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 file is part of Libav.

  6.  *

  7.  * Libav 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.  * Libav 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 Libav; 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

  24.  * ASUS V1/V2 codec.

  25.  */

  26. 

  27. #include "avcodec.h"

  28. #include "libavutil/common.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 av_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, av_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= &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= AV_PICTURE_TYPE_I;

  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]= av_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. 

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

  455.     *data_size = sizeof(AVPicture);

  456. 

  457.     emms_c();

  458. 

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

  460. }

  461. 

  462. #if CONFIG_ASV1_ENCODER || CONFIG_ASV2_ENCODER

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

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

  465.     AVFrame *pict = data;

  466.     AVFrame * const p= &a->picture;

  467.     int size;

  468.     int mb_x, mb_y;

  469. 

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

  471. 

  472.     *p = *pict;

  473.     p->pict_type= AV_PICTURE_TYPE_I;

  474.     p->key_frame= 1;

  475. 

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

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

  478.             dct_get(a, mb_x, mb_y);

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

  480.         }

  481.     }

  482. 

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

  484.         mb_x= a->mb_width2;

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

  486.             dct_get(a, mb_x, mb_y);

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

  488.         }

  489.     }

  490. 

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

  492.         mb_y= a->mb_height2;

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

  494.             dct_get(a, mb_x, mb_y);

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

  496.         }

  497.     }

  498.     emms_c();

  499. 

  500.     align_put_bits(&a->pb);

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

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

  503. 

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

  505. 

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

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

  508.     else{

  509.         int i;

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

  511.             buf[i]= av_reverse[ buf[i] ];

  512.     }

  513. 

  514.     return size*4;

  515. }

  516. #endif /* CONFIG_ASV1_ENCODER || CONFIG_ASV2_ENCODER */

  517. 

  518. static av_cold 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= &a->picture;

  529.     a->avctx= avctx;

  530. }

  531. 

  532. static av_cold int decode_init(AVCodecContext *avctx){

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

  534.     AVFrame *p= &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= 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. #if CONFIG_ASV1_ENCODER || CONFIG_ASV2_ENCODER

  567. static av_cold 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]= av_le2ne32(a->inv_qscale);

  581.     ((uint32_t*)avctx->extradata)[1]= av_le2ne32(AV_RL32("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. #endif /* CONFIG_ASV1_ENCODER || CONFIG_ASV2_ENCODER */

  591. 

  592. static av_cold int decode_end(AVCodecContext *avctx){

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

  594. 

  595.     av_freep(&a->bitstream_buffer);

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

  597.     a->bitstream_buffer_size=0;

  598. 

  599.     if(a->picture.data[0])

  600.         avctx->release_buffer(avctx, &a->picture);

  601. 

  602.     return 0;

  603. }

  604. 

  605. AVCodec ff_asv1_decoder = {

  606.     "asv1",

  607.     AVMEDIA_TYPE_VIDEO,

  608.     CODEC_ID_ASV1,

  609.     sizeof(ASV1Context),

  610.     decode_init,

  611.     NULL,

  612.     decode_end,

  613.     decode_frame,

  614.     CODEC_CAP_DR1,

  615.     .long_name= NULL_IF_CONFIG_SMALL("ASUS V1"),

  616. };

  617. 

  618. AVCodec ff_asv2_decoder = {

  619.     "asv2",

  620.     AVMEDIA_TYPE_VIDEO,

  621.     CODEC_ID_ASV2,

  622.     sizeof(ASV1Context),

  623.     decode_init,

  624.     NULL,

  625.     decode_end,

  626.     decode_frame,

  627.     CODEC_CAP_DR1,

  628.     .long_name= NULL_IF_CONFIG_SMALL("ASUS V2"),

  629. };

  630. 

  631. #if CONFIG_ASV1_ENCODER

  632. AVCodec ff_asv1_encoder = {

  633.     "asv1",

  634.     AVMEDIA_TYPE_VIDEO,

  635.     CODEC_ID_ASV1,

  636.     sizeof(ASV1Context),

  637.     encode_init,

  638.     encode_frame,

  639.     //encode_end,

  640.     .pix_fmts= (const enum PixelFormat[]){PIX_FMT_YUV420P, PIX_FMT_NONE},

  641.     .long_name= NULL_IF_CONFIG_SMALL("ASUS V1"),

  642. };

  643. #endif

  644. 

  645. #if CONFIG_ASV2_ENCODER

  646. AVCodec ff_asv2_encoder = {

  647.     "asv2",

  648.     AVMEDIA_TYPE_VIDEO,

  649.     CODEC_ID_ASV2,

  650.     sizeof(ASV1Context),

  651.     encode_init,

  652.     encode_frame,

  653.     //encode_end,

  654.     .pix_fmts= (const enum PixelFormat[]){PIX_FMT_YUV420P, PIX_FMT_NONE},

  655.     .long_name= NULL_IF_CONFIG_SMALL("ASUS V2"),

  656. };

  657. #endif