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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 FFmpeg.

  6.  *

  7.  * FFmpeg is free software; you can redistribute it and/or

  8.  * modify it under the terms of the GNU Lesser General Public

  9.  * License as published by the Free Software Foundation; either

  10.  * version 2.1 of the License, or (at your option) any later version.

  11.  *

  12.  * FFmpeg is distributed in the hope that it will be useful,

  13.  * but WITHOUT ANY WARRANTY; without even the implied warranty of

  14.  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU

  15.  * Lesser General Public License for more details.

  16.  *

  17.  * You should have received a copy of the GNU Lesser General Public

  18.  * License along with FFmpeg; if not, write to the Free Software

  19.  * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA

  20.  */

  21. 

  22. /**

  23.  * @file

  24.  * ASUS V1/V2 codec.

  25.  */

  26. 

  27. #include "avcodec.h"

  28. #include "internal.h"

  29. #include "libavutil/common.h"

  30. #include "put_bits.h"

  31. #include "dsputil.h"

  32. #include "mpeg12data.h"

  33. 

  34. //#undef NDEBUG

  35. //#include <assert.h>

  36. 

  37. #define VLC_BITS 6

  38. #define ASV2_LEVEL_VLC_BITS 10

  39. 

  40. typedef struct ASV1Context{

  41.     AVCodecContext *avctx;

  42.     DSPContext dsp;

  43.     AVFrame picture;

  44.     PutBitContext pb;

  45.     GetBitContext gb;

  46.     ScanTable scantable;

  47.     int inv_qscale;

  48.     int mb_width;

  49.     int mb_height;

  50.     int mb_width2;

  51.     int mb_height2;

  52.     DECLARE_ALIGNED(16, DCTELEM, block)[6][64];

  53.     uint16_t intra_matrix[64];

  54.     int q_intra_matrix[64];

  55.     uint8_t *bitstream_buffer;

  56.     unsigned int bitstream_buffer_size;

  57. } ASV1Context;

  58. 

  59. static const uint8_t scantab[64]={

  60.     0x00,0x08,0x01,0x09,0x10,0x18,0x11,0x19,

  61.     0x02,0x0A,0x03,0x0B,0x12,0x1A,0x13,0x1B,

  62.     0x04,0x0C,0x05,0x0D,0x20,0x28,0x21,0x29,

  63.     0x06,0x0E,0x07,0x0F,0x14,0x1C,0x15,0x1D,

  64.     0x22,0x2A,0x23,0x2B,0x30,0x38,0x31,0x39,

  65.     0x16,0x1E,0x17,0x1F,0x24,0x2C,0x25,0x2D,

  66.     0x32,0x3A,0x33,0x3B,0x26,0x2E,0x27,0x2F,

  67.     0x34,0x3C,0x35,0x3D,0x36,0x3E,0x37,0x3F,

  68. };

  69. 

  70. 

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

  72.     {0x2,2}, {0x7,5}, {0xB,5}, {0x3,5},

  73.     {0xD,5}, {0x5,5}, {0x9,5}, {0x1,5},

  74.     {0xE,5}, {0x6,5}, {0xA,5}, {0x2,5},

  75.     {0xC,5}, {0x4,5}, {0x8,5}, {0x3,2},

  76.     {0xF,5}, //EOB

  77. };

  78. 

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

  80.     {3,4}, {3,3}, {3,2}, {0,3}, {2,2}, {2,3}, {2,4}

  81. };

  82. 

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

  84.     {0x1,2}, {0xD,4}, {0xF,4}, {0xC,4},

  85.     {0x5,3}, {0xE,4}, {0x4,3}, {0x0,2},

  86. };

  87. 

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

  89.     {0x00,2}, {0x3B,6}, {0x0A,4}, {0x3A,6},

  90.     {0x02,3}, {0x39,6}, {0x3C,6}, {0x38,6},

  91.     {0x03,3}, {0x3D,6}, {0x08,4}, {0x1F,5},

  92.     {0x09,4}, {0x0B,4}, {0x0D,4}, {0x0C,4},

  93. };

  94. 

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

  96.     {0x3F,10},{0x2F,10},{0x37,10},{0x27,10},{0x3B,10},{0x2B,10},{0x33,10},{0x23,10},

  97.     {0x3D,10},{0x2D,10},{0x35,10},{0x25,10},{0x39,10},{0x29,10},{0x31,10},{0x21,10},

  98.     {0x1F, 8},{0x17, 8},{0x1B, 8},{0x13, 8},{0x1D, 8},{0x15, 8},{0x19, 8},{0x11, 8},

  99.     {0x0F, 6},{0x0B, 6},{0x0D, 6},{0x09, 6},

  100.     {0x07, 4},{0x05, 4},

  101.     {0x03, 2},

  102.     {0x00, 5},

  103.     {0x02, 2},

  104.     {0x04, 4},{0x06, 4},

  105.     {0x08, 6},{0x0C, 6},{0x0A, 6},{0x0E, 6},

  106.     {0x10, 8},{0x18, 8},{0x14, 8},{0x1C, 8},{0x12, 8},{0x1A, 8},{0x16, 8},{0x1E, 8},

  107.     {0x20,10},{0x30,10},{0x28,10},{0x38,10},{0x24,10},{0x34,10},{0x2C,10},{0x3C,10},

  108.     {0x22,10},{0x32,10},{0x2A,10},{0x3A,10},{0x26,10},{0x36,10},{0x2E,10},{0x3E,10},

  109. };

  110. 

  111. 

  112. static VLC ccp_vlc;

  113. static VLC level_vlc;

  114. static VLC dc_ccp_vlc;

  115. static VLC ac_ccp_vlc;

  116. static VLC asv2_level_vlc;

  117. 

  118. static av_cold void init_vlcs(ASV1Context *a){

  119.     static int done = 0;

  120. 

  121.     if (!done) {

  122.         done = 1;

  123. 

  124.         INIT_VLC_STATIC(&ccp_vlc, VLC_BITS, 17,

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

  126.                  &ccp_tab[0][0], 2, 1, 64);

  127.         INIT_VLC_STATIC(&dc_ccp_vlc, VLC_BITS, 8,

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

  129.                  &dc_ccp_tab[0][0], 2, 1, 64);

  130.         INIT_VLC_STATIC(&ac_ccp_vlc, VLC_BITS, 16,

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

  132.                  &ac_ccp_tab[0][0], 2, 1, 64);

  133.         INIT_VLC_STATIC(&level_vlc,  VLC_BITS, 7,

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

  135.                  &level_tab[0][0], 2, 1, 64);

  136.         INIT_VLC_STATIC(&asv2_level_vlc, ASV2_LEVEL_VLC_BITS, 63,

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

  138.                  &asv2_level_tab[0][0], 2, 1, 1024);

  139.     }

  140. }

  141. 

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

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

  144.     return av_reverse[ get_bits(gb, n) << (8-n) ];

  145. }

  146. 

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

  148.     put_bits(pb, n, av_reverse[ v << (8-n) ]);

  149. }

  150. 

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

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

  153. 

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

  155.     else        return code - 3;

  156. }

  157. 

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

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

  160. 

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

  162.     else         return code - 31;

  163. }

  164. 

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

  166.     unsigned int index= level + 3;

  167. 

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

  169.     else{

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

  171.         put_sbits(pb, 8, level);

  172.     }

  173. }

  174. 

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

  176.     unsigned int index= level + 31;

  177. 

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

  179.     else{

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

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

  182.     }

  183. }

  184. 

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

  186.     int i;

  187. 

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

  189. 

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

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

  192. 

  193.         if(ccp){

  194.             if(ccp == 16) break;

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

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

  197.                 return -1;

  198.             }

  199. 

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

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

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

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

  204.         }

  205.     }

  206. 

  207.     return 0;

  208. }

  209. 

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

  211.     int i, count, ccp;

  212. 

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

  214. 

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

  216. 

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

  218.     if(ccp){

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

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

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

  222.     }

  223. 

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

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

  226. 

  227.         if(ccp){

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

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

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

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

  232.         }

  233.     }

  234. 

  235.     return 0;

  236. }

  237. 

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

  239.     int i;

  240.     int nc_count=0;

  241. 

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

  243.     block[0]= 0;

  244. 

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

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

  247.         int ccp=0;

  248. 

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

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

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

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

  253. 

  254.         if(ccp){

  255.             for(;nc_count; nc_count--)

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

  257. 

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

  259. 

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

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

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

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

  264.         }else{

  265.             nc_count++;

  266.         }

  267.     }

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

  269. }

  270. 

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

  272.     int i;

  273.     int count=0;

  274. 

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

  276.         const int index= scantab[count];

  277. 

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

  279.             break;

  280.     }

  281. 

  282.     count >>= 2;

  283. 

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

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

  286.     block[0]= 0;

  287. 

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

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

  290.         int ccp=0;

  291. 

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

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

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

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

  296. 

  297.         assert(i || ccp<8);

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

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

  300. 

  301.         if(ccp){

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

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

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

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

  306.         }

  307.     }

  308. }

  309. 

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

  311.     int i;

  312. 

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

  314. 

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

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

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

  318.                 return -1;

  319.         }

  320.     }else{

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

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

  323.                 return -1;

  324.         }

  325.     }

  326.     return 0;

  327. }

  328. 

  329. #define MAX_MB_SIZE (30*16*16*3/2/8)

  330. 

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

  332.     int i;

  333. 

  334.     if (a->pb.buf_end - a->pb.buf - (put_bits_count(&a->pb)>>3) < MAX_MB_SIZE) {

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

  336.         return -1;

  337.     }

  338. 

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

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

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

  342.     }else{

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

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

  345.     }

  346.     return 0;

  347. }

  348. 

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

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

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

  352. 

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

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

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

  356. 

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

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

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

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

  361. 

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

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

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

  365.     }

  366. }

  367. 

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

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

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

  371.     int i;

  372. 

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

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

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

  376. 

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

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

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

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

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

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

  383. 

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

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

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

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

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

  389.     }

  390. }

  391. 

  392. static int decode_frame(AVCodecContext *avctx,

  393.                         void *data, int *data_size,

  394.                         AVPacket *avpkt)

  395. {

  396.     const uint8_t *buf = avpkt->data;

  397.     int buf_size = avpkt->size;

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

  399.     AVFrame *picture = data;

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

  401.     int mb_x, mb_y;

  402. 

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

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

  405. 

  406.     p->reference= 0;

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

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

  409.         return -1;

  410.     }

  411.     p->pict_type= AV_PICTURE_TYPE_I;

  412.     p->key_frame= 1;

  413. 

  414.     av_fast_padded_malloc(&a->bitstream_buffer, &a->bitstream_buffer_size,

  415.                           buf_size);

  416.     if (!a->bitstream_buffer)

  417.         return AVERROR(ENOMEM);

  418. 

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

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

  421.     else{

  422.         int i;

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

  424.             a->bitstream_buffer[i]= av_reverse[ buf[i] ];

  425.     }

  426. 

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

  428. 

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

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

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

  432.                 return -1;

  433. 

  434.             idct_put(a, mb_x, mb_y);

  435.         }

  436.     }

  437. 

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

  439.         mb_x= a->mb_width2;

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

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

  442.                 return -1;

  443. 

  444.             idct_put(a, mb_x, mb_y);

  445.         }

  446.     }

  447. 

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

  449.         mb_y= a->mb_height2;

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

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

  452.                 return -1;

  453. 

  454.             idct_put(a, mb_x, mb_y);

  455.         }

  456.     }

  457. 

  458.     *picture   = a->picture;

  459.     *data_size = sizeof(AVPicture);

  460. 

  461.     emms_c();

  462. 

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

  464. }

  465. 

  466. #if CONFIG_ASV1_ENCODER || CONFIG_ASV2_ENCODER

  467. static int encode_frame(AVCodecContext *avctx, AVPacket *pkt,

  468.                         const AVFrame *pict, int *got_packet)

  469. {

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

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

  472.     int size, ret;

  473.     int mb_x, mb_y;

  474. 

  475.     if ((ret = ff_alloc_packet2(avctx, pkt, a->mb_height*a->mb_width*MAX_MB_SIZE +

  476.                                   FF_MIN_BUFFER_SIZE)) < 0)

  477.         return ret;

  478. 

  479.     init_put_bits(&a->pb, pkt->data, pkt->size);

  480. 

  481.     *p = *pict;

  482.     p->pict_type= AV_PICTURE_TYPE_I;

  483.     p->key_frame= 1;

  484. 

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

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

  487.             dct_get(a, mb_x, mb_y);

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

  489.         }

  490.     }

  491. 

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

  493.         mb_x= a->mb_width2;

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

  495.             dct_get(a, mb_x, mb_y);

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

  497.         }

  498.     }

  499. 

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

  501.         mb_y= a->mb_height2;

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

  503.             dct_get(a, mb_x, mb_y);

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

  505.         }

  506.     }

  507.     emms_c();

  508. 

  509.     avpriv_align_put_bits(&a->pb);

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

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

  512. 

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

  514. 

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

  516.         a->dsp.bswap_buf((uint32_t*)pkt->data, (uint32_t*)pkt->data, size);

  517.     else{

  518.         int i;

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

  520.             pkt->data[i] = av_reverse[pkt->data[i]];

  521.     }

  522. 

  523.     pkt->size   = size*4;

  524.     pkt->flags |= AV_PKT_FLAG_KEY;

  525.     *got_packet = 1;

  526. 

  527.     return 0;

  528. }

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

  530. 

  531. static av_cold void common_init(AVCodecContext *avctx){

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

  533. 

  534.     ff_dsputil_init(&a->dsp, avctx);

  535. 

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

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

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

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

  540. 

  541.     avctx->coded_frame= &a->picture;

  542.     a->avctx= avctx;

  543. }

  544. 

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

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

  547.     AVFrame *p= &a->picture;

  548.     int i;

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

  550. 

  551.     common_init(avctx);

  552.     init_vlcs(a);

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

  554.     avctx->pix_fmt= PIX_FMT_YUV420P;

  555. 

  556.     if(avctx->extradata_size < 1 || (a->inv_qscale= avctx->extradata[0]) == 0){

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

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

  559.             a->inv_qscale= 6;

  560.         else

  561.             a->inv_qscale= 10;

  562.     }

  563. 

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

  565.         int index= scantab[i];

  566. 

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

  568.     }

  569. 

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

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

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

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

  574. 

  575.     return 0;

  576. }

  577. 

  578. #if CONFIG_ASV1_ENCODER || CONFIG_ASV2_ENCODER

  579. static av_cold int encode_init(AVCodecContext *avctx){

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

  581.     int i;

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

  583. 

  584.     common_init(avctx);

  585. 

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

  587. 

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

  589. 

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

  591.     avctx->extradata_size=8;

  592.     ((uint32_t*)avctx->extradata)[0]= av_le2ne32(a->inv_qscale);

  593.     ((uint32_t*)avctx->extradata)[1]= av_le2ne32(AV_RL32("ASUS"));

  594. 

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

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

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

  598.     }

  599. 

  600.     return 0;

  601. }

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

  603. 

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

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

  606. 

  607.     av_freep(&a->bitstream_buffer);

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

  609.     a->bitstream_buffer_size=0;

  610. 

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

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

  613. 

  614.     return 0;

  615. }

  616. 

  617. AVCodec ff_asv1_decoder = {

  618.     .name           = "asv1",

  619.     .type           = AVMEDIA_TYPE_VIDEO,

  620.     .id             = CODEC_ID_ASV1,

  621.     .priv_data_size = sizeof(ASV1Context),

  622.     .init           = decode_init,

  623.     .close          = decode_end,

  624.     .decode         = decode_frame,

  625.     .capabilities   = CODEC_CAP_DR1,

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

  627. };

  628. 

  629. AVCodec ff_asv2_decoder = {

  630.     .name           = "asv2",

  631.     .type           = AVMEDIA_TYPE_VIDEO,

  632.     .id             = CODEC_ID_ASV2,

  633.     .priv_data_size = sizeof(ASV1Context),

  634.     .init           = decode_init,

  635.     .close          = decode_end,

  636.     .decode         = decode_frame,

  637.     .capabilities   = CODEC_CAP_DR1,

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

  639. };

  640. 

  641. #if CONFIG_ASV1_ENCODER

  642. AVCodec ff_asv1_encoder = {

  643.     .name           = "asv1",

  644.     .type           = AVMEDIA_TYPE_VIDEO,

  645.     .id             = CODEC_ID_ASV1,

  646.     .priv_data_size = sizeof(ASV1Context),

  647.     .init           = encode_init,

  648.     .encode2        = encode_frame,

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

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

  651. };

  652. #endif

  653. 

  654. #if CONFIG_ASV2_ENCODER

  655. AVCodec ff_asv2_encoder = {

  656.     .name           = "asv2",

  657.     .type           = AVMEDIA_TYPE_VIDEO,

  658.     .id             = CODEC_ID_ASV2,

  659.     .priv_data_size = sizeof(ASV1Context),

  660.     .init           = encode_init,

  661.     .encode2        = encode_frame,

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

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

  664. };

  665. #endif