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doc/snow: add gray/alpha/gbr
Signed-off-by: Michael Niedermayer <michaelni@gmx.at>
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parent
811d58e083
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24
doc/snow.txt
24
doc/snow.txt
@ -50,8 +50,10 @@ header:
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temporal_decomposition_count u header_state
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spatial_decomposition_count u header_state
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colorspace_type u header_state
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chroma_h_shift u header_state
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chroma_v_shift u header_state
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if (nb_planes > 2) {
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chroma_h_shift u header_state
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chroma_v_shift u header_state
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}
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spatial_scalability b header_state
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max_ref_frames-1 u header_state
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qlogs
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@ -59,7 +61,7 @@ header:
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if(!keyframe){
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update_mc b header_state
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if(update_mc){
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for(plane=0; plane<2; plane++){
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for(plane=0; plane<nb_plane_types; plane++){
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diag_mc b header_state
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htaps/2-1 u header_state
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for(i= p->htaps/2; i; i--)
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@ -80,7 +82,7 @@ header:
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block_max_depth s header_state
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qlogs:
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for(plane=0; plane<2; plane++){
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for(plane=0; plane<nb_plane_types; plane++){
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quant_table[plane][0][0] s header_state
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for(level=0; level < spatial_decomposition_count; level++){
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quant_table[plane][level][1]s header_state
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@ -131,8 +133,10 @@ block(level):
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residual:
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residual2(luma)
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residual2(chroma_cr)
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residual2(chroma_cb)
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if (nb_planes > 2) {
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residual2(chroma_cr)
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residual2(chroma_cb)
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}
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residual2:
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for(level=0; level<spatial_decomposition_count; level++){
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@ -146,7 +150,7 @@ residual2:
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subband:
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FIXME
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nb_plane_types = gray ? 1 : 2;
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Tag description:
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----------------
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@ -168,7 +172,11 @@ spatial_decomposition_count
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FIXME
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colorspace_type
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0
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0 unspecified YcbCr
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1 Gray
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2 Gray + Alpha
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3 GBR
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4 GBRA
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this MUST NOT change within a bitstream
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chroma_h_shift
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