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asv2 encoding 

Originally committed as revision 2187 to svn://svn.ffmpeg.org/ffmpeg/trunk
This commit is contained in:
Michael Niedermayer 2003-09-01 12:26:39 +00:00
parent 9b56edf52a
commit 1149acdc17
2 changed files with 85 additions and 14 deletions
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1
libavcodec/allcodecs.c
View File

@ -68,6 +68,7 @@ void avcodec_register_all(void)
register_avcodec(&ljpeg_encoder);
register_avcodec(&huffyuv_encoder);
register_avcodec(&asv1_encoder);
register_avcodec(&asv2_encoder);
register_avcodec(&ffv1_encoder);
#endif /* CONFIG_ENCODERS */
register_avcodec(&rawvideo_encoder);

98
libavcodec/asv1.c
View File

@ -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; i<s->avctx->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