[FFmpeg-devel] [PATCH] swscale alpha channel support

[Cédric Schieli]

2009/3/5 M?ns Rullg?rd <mans at mansr.com>:
> C?dric Schieli <cschieli at gmail.com> writes:
>
>> #5 : sws_configure_alpha.patch
>> add --swscale-alpha configure option
>>
>> Index: ffmpeg/configure
>> ===================================================================
>> --- ffmpeg.orig/configure ? ? 2009-03-04 20:09:12.285524673 +0100
>> +++ ffmpeg/configure ?2009-03-04 20:30:38.477565212 +0100
>> @@ -93,6 +93,7 @@ show_help(){
>> ? ?echo " ?--disable-ipv6 ? ? ? ? ? disable IPv6 support [no]"
>> ? ?echo " ?--disable-mpegaudio-hp ? faster (but less accurate) MPEG audio decoding [no]"
>> ? ?echo " ?--enable-gray ? ? ? ? ? ?enable full grayscale support (slower color)"
>> + ?echo " ?--enable-swscale-alpha ? enable alpha channel support in swscale"
>> ? ?echo " ?--enable-fastdiv ? ? ? ? enable table-based division"
>> ? ?echo " ?--enable-small ? ? ? ? ? optimize for size instead of speed"
>> ? ?echo " ?--disable-aandct ? ? ? ? disable AAN DCT code"
>> @@ -764,6 +765,7 @@ CONFIG_LIST="
>> ? ? ?gpl
>> ? ? ?gprof
>> ? ? ?gray
>> + ? ?swscale_alpha
>> ? ? ?hardcoded_tables
>> ? ? ?ipv6
>> ? ? ?libamr_nb
>
> Please keep these lists sorted.
>
> Why is this optional anyway?

There are a few non-alpha codepaths that get a bit slower when enabled.

>
> --
> M?ns Rullg?rd
> mans at mansr.com
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