From 1149acdc17a7a894b8f5f700caec0beb755065bb Mon Sep 17 00:00:00 2001 From: Michael Niedermayer Date: Mon, 1 Sep 2003 12:26:39 +0000 Subject: asv2 encoding Originally committed as revision 2187 to svn://svn.ffmpeg.org/ffmpeg/trunk --- libavcodec/asv1.c | 98 +++++++++++++++++++++++++++++++++++++++++++++++-------- 1 file changed, 84 insertions(+), 14 deletions(-) (limited to 'libavcodec/asv1.c') diff --git a/libavcodec/asv1.c b/libavcodec/asv1.c index db3feb054f..87db7f3a44 100644 --- a/libavcodec/asv1.c +++ b/libavcodec/asv1.c @@ -158,6 +158,10 @@ static inline int asv2_get_bits(GetBitContext *gb, int n){ return reverse[ get_bits(gb, n) << (8-n) ]; } +static inline void asv2_put_bits(PutBitContext *pb, int n, int v){ + put_bits(pb, n, reverse[ v << (8-n) ]); +} + static inline int asv1_get_level(GetBitContext *gb){ int code= get_vlc2(gb, level_vlc.table, VLC_BITS, 1); @@ -182,6 +186,16 @@ static inline void asv1_put_level(PutBitContext *pb, int level){ } } +static inline void asv2_put_level(PutBitContext *pb, int level){ + unsigned int index= level + 31; + + if(index <= 62) put_bits(pb, asv2_level_tab[index][1], asv2_level_tab[index][0]); + else{ + put_bits(pb, asv2_level_tab[31][1], asv2_level_tab[31][0]); + asv2_put_bits(pb, 8, level&0xFF); + } +} + static inline int asv1_decode_block(ASV1Context *a, DCTELEM block[64]){ int i; @@ -235,7 +249,7 @@ static inline int asv2_decode_block(ASV1Context *a, DCTELEM block[64]){ return 0; } -static inline void encode_block(ASV1Context *a, DCTELEM block[64]){ +static inline void asv1_encode_block(ASV1Context *a, DCTELEM block[64]){ int i; int nc_count=0; @@ -268,6 +282,44 @@ static inline void encode_block(ASV1Context *a, DCTELEM block[64]){ put_bits(&a->pb, ccp_tab[16][1], ccp_tab[16][0]); } +static inline void asv2_encode_block(ASV1Context *a, DCTELEM block[64]){ + int i; + int count=0; + + for(count=63; count>3; count--){ + const int index= scantab[count]; + + if( (block[index]*a->q_intra_matrix[index] + (1<<15))>>16 ) + break; + } + + count >>= 2; + + asv2_put_bits(&a->pb, 4, count); + asv2_put_bits(&a->pb, 8, (block[0] + 32)>>6); + block[0]= 0; + + for(i=0; i<=count; i++){ + const int index= scantab[4*i]; + int ccp=0; + + if( (block[index + 0] = (block[index + 0]*a->q_intra_matrix[index + 0] + (1<<15))>>16) ) ccp |= 8; + if( (block[index + 8] = (block[index + 8]*a->q_intra_matrix[index + 8] + (1<<15))>>16) ) ccp |= 4; + if( (block[index + 1] = (block[index + 1]*a->q_intra_matrix[index + 1] + (1<<15))>>16) ) ccp |= 2; + if( (block[index + 9] = (block[index + 9]*a->q_intra_matrix[index + 9] + (1<<15))>>16) ) ccp |= 1; + + if(i) put_bits(&a->pb, ac_ccp_tab[ccp][1], ac_ccp_tab[ccp][0]); + else put_bits(&a->pb, dc_ccp_tab[ccp][1], dc_ccp_tab[ccp][0]); + + if(ccp){ + if(ccp&8) asv2_put_level(&a->pb, block[index + 0]); + if(ccp&4) asv2_put_level(&a->pb, block[index + 8]); + if(ccp&2) asv2_put_level(&a->pb, block[index + 1]); + if(ccp&1) asv2_put_level(&a->pb, block[index + 9]); + } + } +} + static inline int decode_mb(ASV1Context *a, DCTELEM block[6][64]){ int i; @@ -290,8 +342,12 @@ static inline int decode_mb(ASV1Context *a, DCTELEM block[6][64]){ static inline void encode_mb(ASV1Context *a, DCTELEM block[6][64]){ int i; - for(i=0; i<6; i++){ - encode_block(a, block[i]); + if(a->avctx->codec_id == CODEC_ID_ASV1){ + for(i=0; i<6; i++) + asv1_encode_block(a, block[i]); + }else{ + for(i=0; i<6; i++) + asv2_encode_block(a, block[i]); } } @@ -417,9 +473,6 @@ for(i=0; iavctx->extradata_size; i++){ } #endif - p->quality= (32 + a->inv_qscale/2)/a->inv_qscale; - memset(p->qscale_table, p->quality, p->qstride*a->mb_height); - *picture= *(AVFrame*)&a->picture; *data_size = sizeof(AVPicture); @@ -471,7 +524,13 @@ static int encode_frame(AVCodecContext *avctx, unsigned char *buf, int buf_size, size= get_bit_count(&a->pb)/32; - a->dsp.bswap_buf((uint32_t*)buf, (uint32_t*)buf, size); + if(avctx->codec_id == CODEC_ID_ASV1) + a->dsp.bswap_buf((uint32_t*)buf, (uint32_t*)buf, size); + else{ + int i; + for(i=0; i<4*size; i++) + buf[i]= reverse[ buf[i] ]; + } return size*4; } @@ -494,6 +553,7 @@ static int decode_init(AVCodecContext *avctx){ ASV1Context * const a = avctx->priv_data; AVFrame *p= (AVFrame*)&a->picture; int i; + const int scale= avctx->codec_id == CODEC_ID_ASV1 ? 1 : 2; common_init(avctx); init_vlcs(a); @@ -511,14 +571,13 @@ static int decode_init(AVCodecContext *avctx){ for(i=0; i<64; i++){ int index= scantab[i]; - if(avctx->codec_id == CODEC_ID_ASV1) - a->intra_matrix[i]= 64 *ff_mpeg1_default_intra_matrix[index] / a->inv_qscale; - else - a->intra_matrix[i]= 128*ff_mpeg1_default_intra_matrix[index] / a->inv_qscale; + a->intra_matrix[i]= 64*scale*ff_mpeg1_default_intra_matrix[index] / a->inv_qscale; } p->qstride= a->mb_width; p->qscale_table= av_mallocz( p->qstride * a->mb_height); + p->quality= (32*scale + a->inv_qscale/2)/a->inv_qscale; + memset(p->qscale_table, p->quality, p->qstride*a->mb_height); return 0; } @@ -526,12 +585,13 @@ static int decode_init(AVCodecContext *avctx){ static int encode_init(AVCodecContext *avctx){ ASV1Context * const a = avctx->priv_data; int i; - + const int scale= avctx->codec_id == CODEC_ID_ASV1 ? 1 : 2; + common_init(avctx); if(avctx->global_quality == 0) avctx->global_quality= 4*FF_QUALITY_SCALE; - a->inv_qscale= (32*FF_QUALITY_SCALE + avctx->global_quality/2) / avctx->global_quality; + a->inv_qscale= (32*scale*FF_QUALITY_SCALE + avctx->global_quality/2) / avctx->global_quality; avctx->extradata= av_mallocz(8); avctx->extradata_size=8; @@ -539,7 +599,7 @@ static int encode_init(AVCodecContext *avctx){ ((uint32_t*)avctx->extradata)[1]= le2me_32(ff_get_fourcc("ASUS")); for(i=0; i<64; i++){ - int q= 32*ff_mpeg1_default_intra_matrix[i]; + int q= 32*scale*ff_mpeg1_default_intra_matrix[i]; a->q_intra_matrix[i]= ((a->inv_qscale<<16) + q/2) / q; } @@ -594,4 +654,14 @@ AVCodec asv1_encoder = { //encode_end, }; +AVCodec asv2_encoder = { + "asv2", + CODEC_TYPE_VIDEO, + CODEC_ID_ASV2, + sizeof(ASV1Context), + encode_init, + encode_frame, + //encode_end, +}; + #endif //CONFIG_ENCODERS -- cgit v1.2.3