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doc/snow: add gray/alpha/gbr 

Signed-off-by: Michael Niedermayer <michaelni@gmx.at>
This commit is contained in:
Michael Niedermayer 2013-08-29 22:05:08 +02:00
parent 811d58e083
commit ec120efaa9
1 changed files with 16 additions and 8 deletions
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24
doc/snow.txt
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@ -50,8 +50,10 @@ header:
temporal_decomposition_count u header_state
spatial_decomposition_count u header_state
colorspace_type u header_state
chroma_h_shift u header_state
chroma_v_shift u header_state
if (nb_planes > 2) {
chroma_h_shift u header_state
chroma_v_shift u header_state
}
spatial_scalability b header_state
max_ref_frames-1 u header_state
qlogs
@ -59,7 +61,7 @@ header:
if(!keyframe){
update_mc b header_state
if(update_mc){
for(plane=0; plane<2; plane++){
for(plane=0; plane<nb_plane_types; plane++){
diag_mc b header_state
htaps/2-1 u header_state
for(i= p->htaps/2; i; i--)
@ -80,7 +82,7 @@ header:
block_max_depth s header_state
qlogs:
for(plane=0; plane<2; plane++){
for(plane=0; plane<nb_plane_types; plane++){
quant_table[plane][0][0] s header_state
for(level=0; level < spatial_decomposition_count; level++){
quant_table[plane][level][1]s header_state
@ -131,8 +133,10 @@ block(level):
residual:
residual2(luma)
residual2(chroma_cr)
residual2(chroma_cb)
if (nb_planes > 2) {
residual2(chroma_cr)
residual2(chroma_cb)
}
residual2:
for(level=0; level<spatial_decomposition_count; level++){
@ -146,7 +150,7 @@ residual2:
subband:
FIXME
nb_plane_types = gray ? 1 : 2;
Tag description:
----------------
@ -168,7 +172,11 @@ spatial_decomposition_count
FIXME
colorspace_type
0
0 unspecified YcbCr
1 Gray
2 Gray + Alpha
3 GBR
4 GBRA
this MUST NOT change within a bitstream
chroma_h_shift