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

  50.     uint16_t intra_matrix[64];

  51.     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 av_cold void init_vlcs(ASV1Context *a){

  116.     static int done = 0;

  117. 

  118.     if (!done) {

  119.         done = 1;

  120. 

  121.         INIT_VLC_STATIC(&ccp_vlc, VLC_BITS, 17,

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

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

  124.         INIT_VLC_STATIC(&dc_ccp_vlc, VLC_BITS, 8,

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

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

  127.         INIT_VLC_STATIC(&ac_ccp_vlc, VLC_BITS, 16,

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

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

  130.         INIT_VLC_STATIC(&level_vlc,  VLC_BITS, 7,

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

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

  133.         INIT_VLC_STATIC(&asv2_level_vlc, ASV2_LEVEL_VLC_BITS, 63,

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

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

  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 av_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, av_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_sbits(pb, 8, level);

  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.         av_assert2(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 == AV_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. #define MAX_MB_SIZE (30*16*16*3/2/8)

  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) < MAX_MB_SIZE) {

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

  333.         return -1;

  334.     }

  335. 

  336.     if(a->avctx->codec_id == AV_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_padded_malloc(&a->bitstream_buffer, &a->bitstream_buffer_size,

  412.                           buf_size);

  413.     if (!a->bitstream_buffer)

  414.         return AVERROR(ENOMEM);

  415. 

  416.     if(avctx->codec_id == AV_CODEC_ID_ASV1)

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

  418.     else{

  419.         int i;

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

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

  422.     }

  423. 

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

  425. 

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

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

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

  429.                 return -1;

  430. 

  431.             idct_put(a, mb_x, mb_y);

  432.         }

  433.     }

  434. 

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

  436.         mb_x= a->mb_width2;

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

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

  439.                 return -1;

  440. 

  441.             idct_put(a, mb_x, mb_y);

  442.         }

  443.     }

  444. 

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

  446.         mb_y= a->mb_height2;

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

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

  449.                 return -1;

  450. 

  451.             idct_put(a, mb_x, mb_y);

  452.         }

  453.     }

  454. 

  455.     *picture   = a->picture;

  456.     *data_size = sizeof(AVPicture);

  457. 

  458.     emms_c();

  459. 

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

  461. }

  462. 

  463. #if CONFIG_ASV1_ENCODER || CONFIG_ASV2_ENCODER

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

  465.                         const AVFrame *pict, int *got_packet)

  466. {

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

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

  469.     int size, ret;

  470.     int mb_x, mb_y;

  471. 

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

  473.                                   FF_MIN_BUFFER_SIZE)) < 0)

  474.         return ret;

  475. 

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

  477. 

  478.     *p = *pict;

  479.     p->pict_type= AV_PICTURE_TYPE_I;

  480.     p->key_frame= 1;

  481. 

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

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

  484.             dct_get(a, mb_x, mb_y);

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

  486.         }

  487.     }

  488. 

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

  490.         mb_x= a->mb_width2;

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

  492.             dct_get(a, mb_x, mb_y);

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

  494.         }

  495.     }

  496. 

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

  498.         mb_y= a->mb_height2;

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

  500.             dct_get(a, mb_x, mb_y);

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

  502.         }

  503.     }

  504.     emms_c();

  505. 

  506.     avpriv_align_put_bits(&a->pb);

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

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

  509. 

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

  511. 

  512.     if(avctx->codec_id == AV_CODEC_ID_ASV1)

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

  514.     else{

  515.         int i;

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

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

  518.     }

  519. 

  520.     pkt->size   = size*4;

  521.     pkt->flags |= AV_PKT_FLAG_KEY;

  522.     *got_packet = 1;

  523. 

  524.     return 0;

  525. }

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

  527. 

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

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

  530. 

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

  532. 

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

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

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

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

  537. 

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

  539.     a->avctx= avctx;

  540. }

  541. 

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

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

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

  545.     int i;

  546.     const int scale= avctx->codec_id == AV_CODEC_ID_ASV1 ? 1 : 2;

  547. 

  548.     common_init(avctx);

  549.     init_vlcs(a);

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

  551.     avctx->pix_fmt= PIX_FMT_YUV420P;

  552. 

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

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

  555.         if(avctx->codec_id == AV_CODEC_ID_ASV1)

  556.             a->inv_qscale= 6;

  557.         else

  558.             a->inv_qscale= 10;

  559.     }

  560. 

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

  562.         int index= scantab[i];

  563. 

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

  565.     }

  566. 

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

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

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

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

  571. 

  572.     return 0;

  573. }

  574. 

  575. #if CONFIG_ASV1_ENCODER || CONFIG_ASV2_ENCODER

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

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

  578.     int i;

  579.     const int scale= avctx->codec_id == AV_CODEC_ID_ASV1 ? 1 : 2;

  580. 

  581.     common_init(avctx);

  582. 

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

  584. 

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

  586. 

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

  588.     avctx->extradata_size=8;

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

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

  591. 

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

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

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

  595.     }

  596. 

  597.     return 0;

  598. }

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

  600. 

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

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

  603. 

  604.     av_freep(&a->bitstream_buffer);

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

  606.     a->bitstream_buffer_size=0;

  607. 

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

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

  610. 

  611.     return 0;

  612. }

  613. 

  614. #if CONFIG_ASV1_DECODER

  615. AVCodec ff_asv1_decoder = {

  616.     .name           = "asv1",

  617.     .type           = AVMEDIA_TYPE_VIDEO,

  618.     .id             = AV_CODEC_ID_ASV1,

  619.     .priv_data_size = sizeof(ASV1Context),

  620.     .init           = decode_init,

  621.     .close          = decode_end,

  622.     .decode         = decode_frame,

  623.     .capabilities   = CODEC_CAP_DR1,

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

  625. };

  626. #endif

  627. 

  628. #if CONFIG_ASV2_DECODER

  629. AVCodec ff_asv2_decoder = {

  630.     .name           = "asv2",

  631.     .type           = AVMEDIA_TYPE_VIDEO,

  632.     .id             = AV_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. #endif

  641. 

  642. #if CONFIG_ASV1_ENCODER

  643. AVCodec ff_asv1_encoder = {

  644.     .name           = "asv1",

  645.     .type           = AVMEDIA_TYPE_VIDEO,

  646.     .id             = AV_CODEC_ID_ASV1,

  647.     .priv_data_size = sizeof(ASV1Context),

  648.     .init           = encode_init,

  649.     .encode2        = encode_frame,

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

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

  652. };

  653. #endif

  654. 

  655. #if CONFIG_ASV2_ENCODER

  656. AVCodec ff_asv2_encoder = {

  657.     .name           = "asv2",

  658.     .type           = AVMEDIA_TYPE_VIDEO,

  659.     .id             = AV_CODEC_ID_ASV2,

  660.     .priv_data_size = sizeof(ASV1Context),

  661.     .init           = encode_init,

  662.     .encode2        = encode_frame,

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

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

  665. };

  666. #endif