falkTX
/
FFmpeg
mirror of https://github.com/falkTX/FFmpeg.git
1
0
Fork 0
Code Issues 0 Releases 338 Wiki Activity
You can not select more than 25 topics Topics must start with a letter or number, can include dashes ('-') and can be up to 35 characters long.
8381 Commits
32 Branches
890MB
Tree: cc58300e30
Branches Tags
${ item.name }
Create branch ${ searchTerm }
from 'cc58300e30'
${ noResults }
FFmpeg/libavcodec/asv1.c

656 lines
19KB
Raw Blame History 

  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 asv1.c

  24.  * ASUS V1/V2 codec.

  25.  */

  26. 

  27. #include "avcodec.h"

  28. #include "dsputil.h"

  29. #include "mpegvideo.h"

  30. 

  31. //#undef NDEBUG

  32. //#include <assert.h>

  33. 

  34. #define VLC_BITS 6

  35. #define ASV2_LEVEL_VLC_BITS 10

  36. 

  37. typedef struct ASV1Context{

  38.     AVCodecContext *avctx;

  39.     DSPContext dsp;

  40.     AVFrame picture;

  41.     PutBitContext pb;

  42.     GetBitContext gb;

  43.     ScanTable scantable;

  44.     int inv_qscale;

  45.     int mb_width;

  46.     int mb_height;

  47.     int mb_width2;

  48.     int mb_height2;

  49.     DECLARE_ALIGNED_8(DCTELEM, block[6][64]);

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

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

  52.     uint8_t *bitstream_buffer;

  53.     unsigned int bitstream_buffer_size;

  54. } ASV1Context;

  55. 

  56. static const uint8_t scantab[64]={

  57.     0x00,0x08,0x01,0x09,0x10,0x18,0x11,0x19,

  58.     0x02,0x0A,0x03,0x0B,0x12,0x1A,0x13,0x1B,

  59.     0x04,0x0C,0x05,0x0D,0x20,0x28,0x21,0x29,

  60.     0x06,0x0E,0x07,0x0F,0x14,0x1C,0x15,0x1D,

  61.     0x22,0x2A,0x23,0x2B,0x30,0x38,0x31,0x39,

  62.     0x16,0x1E,0x17,0x1F,0x24,0x2C,0x25,0x2D,

  63.     0x32,0x3A,0x33,0x3B,0x26,0x2E,0x27,0x2F,

  64.     0x34,0x3C,0x35,0x3D,0x36,0x3E,0x37,0x3F,

  65. };

  66. 

  67. 

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

  69.     {0x2,2}, {0x7,5}, {0xB,5}, {0x3,5},

  70.     {0xD,5}, {0x5,5}, {0x9,5}, {0x1,5},

  71.     {0xE,5}, {0x6,5}, {0xA,5}, {0x2,5},

  72.     {0xC,5}, {0x4,5}, {0x8,5}, {0x3,2},

  73.     {0xF,5}, //EOB

  74. };

  75. 

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

  77.     {3,4}, {3,3}, {3,2}, {0,3}, {2,2}, {2,3}, {2,4}

  78. };

  79. 

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

  81.     {0x1,2}, {0xD,4}, {0xF,4}, {0xC,4},

  82.     {0x5,3}, {0xE,4}, {0x4,3}, {0x0,2},

  83. };

  84. 

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

  86.     {0x00,2}, {0x3B,6}, {0x0A,4}, {0x3A,6},

  87.     {0x02,3}, {0x39,6}, {0x3C,6}, {0x38,6},

  88.     {0x03,3}, {0x3D,6}, {0x08,4}, {0x1F,5},

  89.     {0x09,4}, {0x0B,4}, {0x0D,4}, {0x0C,4},

  90. };

  91. 

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

  93.     {0x3F,10},{0x2F,10},{0x37,10},{0x27,10},{0x3B,10},{0x2B,10},{0x33,10},{0x23,10},

  94.     {0x3D,10},{0x2D,10},{0x35,10},{0x25,10},{0x39,10},{0x29,10},{0x31,10},{0x21,10},

  95.     {0x1F, 8},{0x17, 8},{0x1B, 8},{0x13, 8},{0x1D, 8},{0x15, 8},{0x19, 8},{0x11, 8},

  96.     {0x0F, 6},{0x0B, 6},{0x0D, 6},{0x09, 6},

  97.     {0x07, 4},{0x05, 4},

  98.     {0x03, 2},

  99.     {0x00, 5},

  100.     {0x02, 2},

  101.     {0x04, 4},{0x06, 4},

  102.     {0x08, 6},{0x0C, 6},{0x0A, 6},{0x0E, 6},

  103.     {0x10, 8},{0x18, 8},{0x14, 8},{0x1C, 8},{0x12, 8},{0x1A, 8},{0x16, 8},{0x1E, 8},

  104.     {0x20,10},{0x30,10},{0x28,10},{0x38,10},{0x24,10},{0x34,10},{0x2C,10},{0x3C,10},

  105.     {0x22,10},{0x32,10},{0x2A,10},{0x3A,10},{0x26,10},{0x36,10},{0x2E,10},{0x3E,10},

  106. };

  107. 

  108. 

  109. static VLC ccp_vlc;

  110. static VLC level_vlc;

  111. static VLC dc_ccp_vlc;

  112. static VLC ac_ccp_vlc;

  113. static VLC asv2_level_vlc;

  114. 

  115. static void init_vlcs(ASV1Context *a){

  116.     static int done = 0;

  117. 

  118.     if (!done) {

  119.         done = 1;

  120. 

  121.         init_vlc(&ccp_vlc, VLC_BITS, 17,

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

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

  124.         init_vlc(&dc_ccp_vlc, VLC_BITS, 8,

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

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

  127.         init_vlc(&ac_ccp_vlc, VLC_BITS, 16,

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

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

  130.         init_vlc(&level_vlc,  VLC_BITS, 7,

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

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

  133.         init_vlc(&asv2_level_vlc, ASV2_LEVEL_VLC_BITS, 63,

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

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

  136.     }

  137. }

  138. 

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

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

  141.     return ff_reverse[ get_bits(gb, n) << (8-n) ];

  142. }

  143. 

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

  145.     put_bits(pb, n, ff_reverse[ v << (8-n) ]);

  146. }

  147. 

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

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

  150. 

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

  152.     else        return code - 3;

  153. }

  154. 

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

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

  157. 

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

  159.     else         return code - 31;

  160. }

  161. 

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

  163.     unsigned int index= level + 3;

  164. 

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

  166.     else{

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

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

  169.     }

  170. }

  171. 

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

  173.     unsigned int index= level + 31;

  174. 

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

  176.     else{

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

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

  179.     }

  180. }

  181. 

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

  183.     int i;

  184. 

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

  186. 

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

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

  189. 

  190.         if(ccp){

  191.             if(ccp == 16) break;

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

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

  194.                 return -1;

  195.             }

  196. 

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

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

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

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

  201.         }

  202.     }

  203. 

  204.     return 0;

  205. }

  206. 

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

  208.     int i, count, ccp;

  209. 

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

  211. 

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

  213. 

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

  215.     if(ccp){

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

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

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

  219.     }

  220. 

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

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

  223. 

  224.         if(ccp){

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

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

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

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

  229.         }

  230.     }

  231. 

  232.     return 0;

  233. }

  234. 

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

  236.     int i;

  237.     int nc_count=0;

  238. 

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

  240.     block[0]= 0;

  241. 

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

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

  244.         int ccp=0;

  245. 

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

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

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

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

  250. 

  251.         if(ccp){

  252.             for(;nc_count; nc_count--)

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

  254. 

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

  256. 

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

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

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

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

  261.         }else{

  262.             nc_count++;

  263.         }

  264.     }

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

  266. }

  267. 

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

  269.     int i;

  270.     int count=0;

  271. 

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

  273.         const int index= scantab[count];

  274. 

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

  276.             break;

  277.     }

  278. 

  279.     count >>= 2;

  280. 

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

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

  283.     block[0]= 0;

  284. 

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

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

  287.         int ccp=0;

  288. 

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

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

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

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

  293. 

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

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

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

  297. 

  298.         if(ccp){

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

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

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

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

  303.         }

  304.     }

  305. }

  306. 

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

  308.     int i;

  309. 

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

  311. 

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

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

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

  315.                 return -1;

  316.         }

  317.     }else{

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

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

  320.                 return -1;

  321.         }

  322.     }

  323.     return 0;

  324. }

  325. 

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

  327.     int i;

  328. 

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

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

  331.         return -1;

  332.     }

  333. 

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

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

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

  337.     }else{

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

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

  340.     }

  341.     return 0;

  342. }

  343. 

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

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

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

  347. 

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

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

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

  351. 

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

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

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

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

  356. 

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

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

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

  360.     }

  361. }

  362. 

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

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

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

  366.     int i;

  367. 

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

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

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

  371. 

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

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

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

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

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

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

  378. 

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

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

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

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

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

  384.     }

  385. }

  386. 

  387. static int decode_frame(AVCodecContext *avctx,

  388.                         void *data, int *data_size,

  389.                         uint8_t *buf, int buf_size)

  390. {

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

  392.     AVFrame *picture = data;

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

  394.     int mb_x, mb_y;

  395. 

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

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

  398. 

  399.     p->reference= 0;

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

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

  402.         return -1;

  403.     }

  404.     p->pict_type= I_TYPE;

  405.     p->key_frame= 1;

  406. 

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

  408. 

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

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

  411.     else{

  412.         int i;

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

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

  415.     }

  416. 

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

  418. 

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

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

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

  422.                 return -1;

  423. 

  424.             idct_put(a, mb_x, mb_y);

  425.         }

  426.     }

  427. 

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

  429.         mb_x= a->mb_width2;

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

  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_height2 != a->mb_height){

  439.         mb_y= a->mb_height2;

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

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

  442.                 return -1;

  443. 

  444.             idct_put(a, mb_x, mb_y);

  445.         }

  446.     }

  447. #if 0

  448. int i;

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

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

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

  452. }

  453. 

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

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

  456. }

  457. #endif

  458. 

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

  460.     *data_size = sizeof(AVPicture);

  461. 

  462.     emms_c();

  463. 

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

  465. }

  466. 

  467. #ifdef CONFIG_ENCODERS

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

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

  470.     AVFrame *pict = data;

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

  472.     int size;

  473.     int mb_x, mb_y;

  474. 

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

  476. 

  477.     *p = *pict;

  478.     p->pict_type= I_TYPE;

  479.     p->key_frame= 1;

  480. 

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

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

  483.             dct_get(a, mb_x, mb_y);

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

  485.         }

  486.     }

  487. 

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

  489.         mb_x= a->mb_width2;

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

  491.             dct_get(a, mb_x, mb_y);

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

  493.         }

  494.     }

  495. 

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

  497.         mb_y= a->mb_height2;

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

  499.             dct_get(a, mb_x, mb_y);

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

  501.         }

  502.     }

  503.     emms_c();

  504. 

  505.     align_put_bits(&a->pb);

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

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

  508. 

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

  510. 

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

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

  513.     else{

  514.         int i;

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

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

  517.     }

  518. 

  519.     return size*4;

  520. }

  521. #endif /* CONFIG_ENCODERS */

  522. 

  523. static void common_init(AVCodecContext *avctx){

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

  525. 

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

  527. 

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

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

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

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

  532. 

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

  534.     a->avctx= avctx;

  535. }

  536. 

  537. static int decode_init(AVCodecContext *avctx){

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

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

  540.     int i;

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

  542. 

  543.     common_init(avctx);

  544.     init_vlcs(a);

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

  546.     avctx->pix_fmt= PIX_FMT_YUV420P;

  547. 

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

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

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

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

  552.             a->inv_qscale= 6;

  553.         else

  554.             a->inv_qscale= 10;

  555.     }

  556. 

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

  558.         int index= scantab[i];

  559. 

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

  561.     }

  562. 

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

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

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

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

  567. 

  568.     return 0;

  569. }

  570. 

  571. #ifdef CONFIG_ENCODERS

  572. static int encode_init(AVCodecContext *avctx){

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

  574.     int i;

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

  576. 

  577.     common_init(avctx);

  578. 

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

  580. 

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

  582. 

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

  584.     avctx->extradata_size=8;

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

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

  587. 

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

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

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

  591.     }

  592. 

  593.     return 0;

  594. }

  595. #endif

  596. 

  597. static int decode_end(AVCodecContext *avctx){

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

  599. 

  600.     av_freep(&a->bitstream_buffer);

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

  602.     a->bitstream_buffer_size=0;

  603. 

  604.     return 0;

  605. }

  606. 

  607. AVCodec asv1_decoder = {

  608.     "asv1",

  609.     CODEC_TYPE_VIDEO,

  610.     CODEC_ID_ASV1,

  611.     sizeof(ASV1Context),

  612.     decode_init,

  613.     NULL,

  614.     decode_end,

  615.     decode_frame,

  616.     CODEC_CAP_DR1,

  617. };

  618. 

  619. AVCodec asv2_decoder = {

  620.     "asv2",

  621.     CODEC_TYPE_VIDEO,

  622.     CODEC_ID_ASV2,

  623.     sizeof(ASV1Context),

  624.     decode_init,

  625.     NULL,

  626.     decode_end,

  627.     decode_frame,

  628.     CODEC_CAP_DR1,

  629. };

  630. 

  631. #ifdef CONFIG_ENCODERS

  632. 

  633. AVCodec asv1_encoder = {

  634.     "asv1",

  635.     CODEC_TYPE_VIDEO,

  636.     CODEC_ID_ASV1,

  637.     sizeof(ASV1Context),

  638.     encode_init,

  639.     encode_frame,

  640.     //encode_end,

  641.     .pix_fmts= (enum PixelFormat[]){PIX_FMT_YUV420P, -1},

  642. };

  643. 

  644. AVCodec asv2_encoder = {

  645.     "asv2",

  646.     CODEC_TYPE_VIDEO,

  647.     CODEC_ID_ASV2,

  648.     sizeof(ASV1Context),

  649.     encode_init,

  650.     encode_frame,

  651.     //encode_end,

  652.     .pix_fmts= (enum PixelFormat[]){PIX_FMT_YUV420P, -1},

  653. };

  654. 

  655. #endif //CONFIG_ENCODERS