[FFmpeg-devel] av_parse_color() more improvement

[Aurelien Jacobs]

Hi,

Attached patch adds one more little improvement to av_parse_color(), to
finally make it fully usable in my upcoming SubRip decoder.
It simply allows specifying the color_string length so that the SubRip
decoder can just point color_string into the SubRip formatted text
buffer instead of making a copy of the color string with the sole
purpose to null-terminate it.
Anyway, av_parse_color() already makes a copy of the string so better not
force the caller to make one more copy.

Aurel
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