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458 lines
13 KiB
458 lines
13 KiB
/* |
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* ASUS V1 codec |
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* Copyright (c) 2003 Michael Niedermayer |
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* |
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* This library is free software; you can redistribute it and/or |
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* modify it under the terms of the GNU Lesser General Public |
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* License as published by the Free Software Foundation; either |
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* version 2 of the License, or (at your option) any later version. |
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* |
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* This library is distributed in the hope that it will be useful, |
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* but WITHOUT ANY WARRANTY; without even the implied warranty of |
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU |
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* Lesser General Public License for more details. |
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* |
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* You should have received a copy of the GNU Lesser General Public |
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* License along with this library; if not, write to the Free Software |
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* Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA |
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*/ |
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/** |
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* @file asv1.c |
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* ASUS V1 codec. |
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*/ |
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#include "avcodec.h" |
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#include "dsputil.h" |
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#include "mpegvideo.h" |
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//#undef NDEBUG |
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//#include <assert.h> |
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#define VLC_BITS 5 |
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typedef struct ASV1Context{ |
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AVCodecContext *avctx; |
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DSPContext dsp; |
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AVFrame picture; |
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PutBitContext pb; |
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GetBitContext gb; |
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ScanTable scantable; |
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int inv_qscale; |
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int mb_width; |
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int mb_height; |
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int mb_width2; |
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int mb_height2; |
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DCTELEM __align8 block[6][64]; |
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uint16_t __align8 intra_matrix[64]; |
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int __align8 q_intra_matrix[64]; |
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uint8_t *bitstream_buffer; |
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int bitstream_buffer_size; |
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} ASV1Context; |
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static const uint8_t scantab[64]={ |
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0x00,0x08,0x01,0x09,0x10,0x18,0x11,0x19, |
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0x02,0x0A,0x03,0x0B,0x12,0x1A,0x13,0x1B, |
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0x04,0x0C,0x05,0x0D,0x20,0x28,0x21,0x29, |
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0x06,0x0E,0x07,0x0F,0x14,0x1C,0x15,0x1D, |
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0x22,0x2A,0x23,0x2B,0x30,0x38,0x31,0x39, |
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}; |
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static const uint8_t ccp_tab[17][2]={ |
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{0x2,2}, {0xE,5}, {0xD,5}, {0xC,5}, |
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{0xB,5}, {0xA,5}, {0x9,5}, {0x8,5}, |
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{0x7,5}, {0x6,5}, {0x5,5}, {0x4,5}, |
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{0x3,5}, {0x2,5}, {0x1,5}, {0x3,2}, |
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{0xF,5}, //EOB |
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}; |
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static const uint8_t level_tab[7][2]={ |
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{3,4}, {3,3}, {3,2}, {0,3}, {2,2}, {2,3}, {2,4} |
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}; |
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static VLC ccp_vlc; |
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static VLC level_vlc; |
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static void init_vlcs(ASV1Context *a){ |
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static int done = 0; |
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if (!done) { |
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done = 1; |
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init_vlc(&ccp_vlc, VLC_BITS, 17, |
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&ccp_tab[0][1], 2, 1, |
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&ccp_tab[0][0], 2, 1); |
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init_vlc(&level_vlc, VLC_BITS, 7, |
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&level_tab[0][1], 2, 1, |
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&level_tab[0][0], 2, 1); |
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} |
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} |
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static inline int get_level(GetBitContext *gb){ |
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int code= get_vlc2(gb, level_vlc.table, VLC_BITS, 1); |
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if(code==3) return get_sbits(gb, 8); |
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else return code - 3; |
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} |
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static inline void put_level(PutBitContext *pb, int level){ |
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unsigned int index= level + 3; |
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if(index <= 6) put_bits(pb, level_tab[index][1], level_tab[index][0]); |
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else{ |
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put_bits(pb, level_tab[3][1], level_tab[3][0]); |
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put_bits(pb, 8, level&0xFF); |
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} |
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} |
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static inline int decode_block(ASV1Context *a, DCTELEM block[64]){ |
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int i; |
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block[0]= 8*get_bits(&a->gb, 8); |
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for(i=0; i<11; i++){ |
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const int ccp= get_vlc2(&a->gb, ccp_vlc.table, VLC_BITS, 1); |
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if(ccp){ |
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if(ccp == 16) break; |
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if(ccp < 0 || i>=10){ |
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printf("coded coeff pattern damaged\n"); |
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return -1; |
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} |
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if(ccp&1) block[a->scantable.permutated[4*i+0]]= (get_level(&a->gb) * a->intra_matrix[4*i+0])>>4; |
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if(ccp&2) block[a->scantable.permutated[4*i+1]]= (get_level(&a->gb) * a->intra_matrix[4*i+1])>>4; |
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if(ccp&4) block[a->scantable.permutated[4*i+2]]= (get_level(&a->gb) * a->intra_matrix[4*i+2])>>4; |
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if(ccp&8) block[a->scantable.permutated[4*i+3]]= (get_level(&a->gb) * a->intra_matrix[4*i+3])>>4; |
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} |
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} |
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return 0; |
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} |
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static inline void encode_block(ASV1Context *a, DCTELEM block[64]){ |
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int i; |
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int nc_count=0; |
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put_bits(&a->pb, 8, (block[0] + 32)>>6); |
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block[0]= 0; |
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for(i=0; i<10; i++){ |
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const int index= scantab[4*i]; |
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int ccp=0; |
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if( (block[index + 0] = (block[index + 0]*a->q_intra_matrix[index + 0] + (1<<15))>>16) ) ccp |= 1; |
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if( (block[index + 8] = (block[index + 8]*a->q_intra_matrix[index + 8] + (1<<15))>>16) ) ccp |= 2; |
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if( (block[index + 1] = (block[index + 1]*a->q_intra_matrix[index + 1] + (1<<15))>>16) ) ccp |= 4; |
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if( (block[index + 9] = (block[index + 9]*a->q_intra_matrix[index + 9] + (1<<15))>>16) ) ccp |= 8; |
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if(ccp){ |
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for(;nc_count; nc_count--) |
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put_bits(&a->pb, ccp_tab[0][1], ccp_tab[0][0]); |
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put_bits(&a->pb, ccp_tab[ccp][1], ccp_tab[ccp][0]); |
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if(ccp&1) put_level(&a->pb, block[index + 0]); |
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if(ccp&2) put_level(&a->pb, block[index + 8]); |
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if(ccp&4) put_level(&a->pb, block[index + 1]); |
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if(ccp&8) put_level(&a->pb, block[index + 9]); |
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}else{ |
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nc_count++; |
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} |
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} |
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put_bits(&a->pb, ccp_tab[16][1], ccp_tab[16][0]); |
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} |
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static inline int decode_mb(ASV1Context *a, DCTELEM block[6][64]){ |
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int i; |
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a->dsp.clear_blocks(block[0]); |
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for(i=0; i<6; i++){ |
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if( decode_block(a, block[i]) < 0) |
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return -1; |
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} |
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return 0; |
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} |
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static inline void encode_mb(ASV1Context *a, DCTELEM block[6][64]){ |
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int i; |
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for(i=0; i<6; i++){ |
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encode_block(a, block[i]); |
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} |
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} |
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static inline void idct_put(ASV1Context *a, int mb_x, int mb_y){ |
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DCTELEM (*block)[64]= a->block; |
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int linesize= a->picture.linesize[0]; |
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uint8_t *dest_y = a->picture.data[0] + (mb_y * 16* linesize ) + mb_x * 16; |
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uint8_t *dest_cb = a->picture.data[1] + (mb_y * 8 * a->picture.linesize[1]) + mb_x * 8; |
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uint8_t *dest_cr = a->picture.data[2] + (mb_y * 8 * a->picture.linesize[2]) + mb_x * 8; |
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a->dsp.idct_put(dest_y , linesize, block[0]); |
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a->dsp.idct_put(dest_y + 8, linesize, block[1]); |
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a->dsp.idct_put(dest_y + 8*linesize , linesize, block[2]); |
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a->dsp.idct_put(dest_y + 8*linesize + 8, linesize, block[3]); |
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if(!(a->avctx->flags&CODEC_FLAG_GRAY)){ |
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a->dsp.idct_put(dest_cb, a->picture.linesize[1], block[4]); |
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a->dsp.idct_put(dest_cr, a->picture.linesize[2], block[5]); |
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} |
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} |
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static inline void dct_get(ASV1Context *a, int mb_x, int mb_y){ |
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DCTELEM (*block)[64]= a->block; |
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int linesize= a->picture.linesize[0]; |
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int i; |
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uint8_t *ptr_y = a->picture.data[0] + (mb_y * 16* linesize ) + mb_x * 16; |
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uint8_t *ptr_cb = a->picture.data[1] + (mb_y * 8 * a->picture.linesize[1]) + mb_x * 8; |
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uint8_t *ptr_cr = a->picture.data[2] + (mb_y * 8 * a->picture.linesize[2]) + mb_x * 8; |
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a->dsp.get_pixels(block[0], ptr_y , linesize); |
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a->dsp.get_pixels(block[1], ptr_y + 8, linesize); |
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a->dsp.get_pixels(block[2], ptr_y + 8*linesize , linesize); |
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a->dsp.get_pixels(block[3], ptr_y + 8*linesize + 8, linesize); |
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for(i=0; i<4; i++) |
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a->dsp.fdct(block[i]); |
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if(!(a->avctx->flags&CODEC_FLAG_GRAY)){ |
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a->dsp.get_pixels(block[4], ptr_cb, a->picture.linesize[1]); |
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a->dsp.get_pixels(block[5], ptr_cr, a->picture.linesize[2]); |
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for(i=4; i<6; i++) |
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a->dsp.fdct(block[i]); |
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} |
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} |
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static int decode_frame(AVCodecContext *avctx, |
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void *data, int *data_size, |
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uint8_t *buf, int buf_size) |
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{ |
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ASV1Context * const a = avctx->priv_data; |
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AVFrame *picture = data; |
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AVFrame * const p= (AVFrame*)&a->picture; |
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int mb_x, mb_y; |
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*data_size = 0; |
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/* special case for last picture */ |
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if (buf_size == 0) { |
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return 0; |
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} |
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if(p->data[0]) |
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avctx->release_buffer(avctx, p); |
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p->reference= 0; |
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if(avctx->get_buffer(avctx, p) < 0){ |
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fprintf(stderr, "get_buffer() failed\n"); |
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return -1; |
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} |
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p->pict_type= I_TYPE; |
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p->key_frame= 1; |
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a->bitstream_buffer= av_fast_realloc(a->bitstream_buffer, &a->bitstream_buffer_size, buf_size + FF_INPUT_BUFFER_PADDING_SIZE); |
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a->dsp.bswap_buf((uint32_t*)a->bitstream_buffer, (uint32_t*)buf, buf_size/4); |
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init_get_bits(&a->gb, a->bitstream_buffer, buf_size*8); |
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for(mb_y=0; mb_y<a->mb_height2; mb_y++){ |
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for(mb_x=0; mb_x<a->mb_width2; mb_x++){ |
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if( decode_mb(a, a->block) <0) |
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return -1; |
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idct_put(a, mb_x, mb_y); |
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} |
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} |
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if(a->mb_width2 != a->mb_width){ |
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mb_x= a->mb_width2; |
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for(mb_y=0; mb_y<a->mb_height2; mb_y++){ |
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if( decode_mb(a, a->block) <0) |
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return -1; |
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idct_put(a, mb_x, mb_y); |
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} |
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} |
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if(a->mb_height2 != a->mb_height){ |
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mb_y= a->mb_height2; |
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for(mb_x=0; mb_x<a->mb_width; mb_x++){ |
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if( decode_mb(a, a->block) <0) |
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return -1; |
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idct_put(a, mb_x, mb_y); |
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} |
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} |
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#if 0 |
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int i; |
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printf("%d %d\n", 8*buf_size, get_bits_count(&a->gb)); |
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for(i=get_bits_count(&a->gb); i<8*buf_size; i++){ |
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printf("%d", get_bits1(&a->gb)); |
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} |
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for(i=0; i<s->avctx->extradata_size; i++){ |
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printf("%c\n", ((uint8_t*)s->avctx->extradata)[i]); |
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} |
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#endif |
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p->quality= (32 + a->inv_qscale/2)/a->inv_qscale; |
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memset(p->qscale_table, p->quality, p->qstride*a->mb_height); |
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*picture= *(AVFrame*)&a->picture; |
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*data_size = sizeof(AVPicture); |
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emms_c(); |
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return (get_bits_count(&a->gb)+31)/32*4; |
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} |
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static int encode_frame(AVCodecContext *avctx, unsigned char *buf, int buf_size, void *data){ |
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ASV1Context * const a = avctx->priv_data; |
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AVFrame *pict = data; |
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AVFrame * const p= (AVFrame*)&a->picture; |
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int size; |
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int mb_x, mb_y; |
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init_put_bits(&a->pb, buf, buf_size, NULL, NULL); |
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*p = *pict; |
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p->pict_type= I_TYPE; |
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p->key_frame= 1; |
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for(mb_y=0; mb_y<a->mb_height2; mb_y++){ |
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for(mb_x=0; mb_x<a->mb_width2; mb_x++){ |
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dct_get(a, mb_x, mb_y); |
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encode_mb(a, a->block); |
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} |
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} |
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if(a->mb_width2 != a->mb_width){ |
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mb_x= a->mb_width2; |
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for(mb_y=0; mb_y<a->mb_height2; mb_y++){ |
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dct_get(a, mb_x, mb_y); |
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encode_mb(a, a->block); |
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} |
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} |
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if(a->mb_height2 != a->mb_height){ |
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mb_y= a->mb_height2; |
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for(mb_x=0; mb_x<a->mb_width; mb_x++){ |
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dct_get(a, mb_x, mb_y); |
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encode_mb(a, a->block); |
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} |
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} |
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emms_c(); |
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align_put_bits(&a->pb); |
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while(get_bit_count(&a->pb)&31) |
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put_bits(&a->pb, 8, 0); |
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size= get_bit_count(&a->pb)/32; |
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a->dsp.bswap_buf((uint32_t*)buf, (uint32_t*)buf, size); |
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return size*4; |
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} |
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static void common_init(AVCodecContext *avctx){ |
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ASV1Context * const a = avctx->priv_data; |
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dsputil_init(&a->dsp, avctx); |
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a->mb_width = (avctx->width + 15) / 16; |
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a->mb_height = (avctx->height + 15) / 16; |
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a->mb_width2 = (avctx->width + 0) / 16; |
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a->mb_height2 = (avctx->height + 0) / 16; |
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avctx->coded_frame= (AVFrame*)&a->picture; |
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a->avctx= avctx; |
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} |
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static int decode_init(AVCodecContext *avctx){ |
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ASV1Context * const a = avctx->priv_data; |
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AVFrame *p= (AVFrame*)&a->picture; |
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int i; |
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common_init(avctx); |
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init_vlcs(a); |
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ff_init_scantable(a->dsp.idct_permutation, &a->scantable, scantab); |
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a->inv_qscale= le2me_32(((uint32_t*)avctx->extradata)[0]); |
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if(a->inv_qscale == 0){ |
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printf("illegal qscale 0\n"); |
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a->inv_qscale= 6; |
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} |
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for(i=0; i<64; i++){ |
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int index= scantab[i]; |
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a->intra_matrix[i]= 64*ff_mpeg1_default_intra_matrix[index] / a->inv_qscale; |
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} |
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p->qstride= a->mb_width; |
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p->qscale_table= av_mallocz( p->qstride * a->mb_height); |
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return 0; |
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} |
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static int encode_init(AVCodecContext *avctx){ |
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ASV1Context * const a = avctx->priv_data; |
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int i; |
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common_init(avctx); |
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if(avctx->global_quality == 0) avctx->global_quality= 4*FF_QUALITY_SCALE; |
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a->inv_qscale= (32*FF_QUALITY_SCALE + avctx->global_quality/2) / avctx->global_quality; |
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avctx->extradata= av_mallocz(8); |
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avctx->extradata_size=8; |
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((uint32_t*)avctx->extradata)[0]= le2me_32(a->inv_qscale); |
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((uint32_t*)avctx->extradata)[1]= le2me_32(ff_get_fourcc("ASUS")); |
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for(i=0; i<64; i++){ |
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int q= 32*ff_mpeg1_default_intra_matrix[i]; |
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a->q_intra_matrix[i]= ((a->inv_qscale<<16) + q/2) / q; |
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} |
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return 0; |
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} |
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static int decode_end(AVCodecContext *avctx){ |
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ASV1Context * const a = avctx->priv_data; |
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av_freep(&a->bitstream_buffer); |
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av_freep(&a->picture.qscale_table); |
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a->bitstream_buffer_size=0; |
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avcodec_default_free_buffers(avctx); |
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return 0; |
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} |
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AVCodec asv1_decoder = { |
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"asv1", |
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CODEC_TYPE_VIDEO, |
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CODEC_ID_ASV1, |
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sizeof(ASV1Context), |
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decode_init, |
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NULL, |
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decode_end, |
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decode_frame, |
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CODEC_CAP_DR1, |
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}; |
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#ifdef CONFIG_ENCODERS |
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AVCodec asv1_encoder = { |
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"asv1", |
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CODEC_TYPE_VIDEO, |
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CODEC_ID_ASV1, |
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sizeof(ASV1Context), |
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encode_init, |
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encode_frame, |
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//encode_end, |
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}; |
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#endif //CONFIG_ENCODERS
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