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merge U and V statistics, 33% reduction in memory requirement, compression rate better for some files worse for others, worst compression rate loss 0.05% 

Originally committed as revision 2015 to svn://svn.ffmpeg.org/ffmpeg/trunk
This commit is contained in:
Michael Niedermayer 2003-07-05 14:18:07 +00:00
parent 147e5200ca
commit 27fc5352d0
1 changed files with 4 additions and 4 deletions
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8
libavcodec/ffv1.c
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@ -487,7 +487,7 @@ static int encode_init(AVCodecContext *avctx)
s->version=0;
s->ac= avctx->coder_type;
s->plane_count=3;
s->plane_count=2;
for(i=0; i<256; i++){
s->quant_table[0][i]= quant11[i];
s->quant_table[1][i]= 11*quant11[i];
@ -606,7 +606,7 @@ static int encode_frame(AVCodecContext *avctx, unsigned char *buf, int buf_size,
encode_plane(f, p->data[0], width, height, p->linesize[0], 0);
encode_plane(f, p->data[1], chroma_width, chroma_height, p->linesize[1], 1);
encode_plane(f, p->data[2], chroma_width, chroma_height, p->linesize[2], 2);
encode_plane(f, p->data[2], chroma_width, chroma_height, p->linesize[2], 1);
}
emms_c();
@ -751,7 +751,7 @@ static int read_header(FFV1Context *f){
f->chroma_h_shift= get_symbol(c, state, 0, 7);
f->chroma_v_shift= get_symbol(c, state, 0, 7);
get_cabac(c, state); //transparency plane
f->plane_count= 3;
f->plane_count= 2;
switch(16*f->chroma_h_shift + f->chroma_v_shift){
case 0x00: f->avctx->pix_fmt= PIX_FMT_YUV444P; break;
@ -870,7 +870,7 @@ static int decode_frame(AVCodecContext *avctx, void *data, int *data_size, uint8
decode_plane(f, p->data[0], width, height, p->linesize[0], 0);
decode_plane(f, p->data[1], chroma_width, chroma_height, p->linesize[1], 1);
decode_plane(f, p->data[2], chroma_width, chroma_height, p->linesize[2], 2);
decode_plane(f, p->data[2], chroma_width, chroma_height, p->linesize[2], 1);
}
emms_c();