[x264-devel] Bug#667573: x264: 10 bit builds

[Jason Garrett-Glaser]

On Wed, Jan 16, 2013 at 7:59 AM, Sebastian Dröge
<slomo at circular-chaos.org> wrote:
> On Mi, 2013-01-16 at 16:45 +0100, Nicolas George wrote:
>> Le septidi 27 nivôse, an CCXXI, Sebastian Dröge a écrit :
>> > Right, but the calling application has no way to know what the library
>> > will accept other than looking at x264_config.h.
>>
>> That is not true:
>>
>> /* x264_bit_depth:
>>  *      Specifies the number of bits per pixel that x264 uses. This is also the
>>  *      bit depth that x264 encodes in. If this value is > 8, x264 will read
>>  *      two bytes of input data for each pixel sample, and expect the upper
>>  *      (16-x264_bit_depth) bits to be zero.
>>  *      Note: The flag X264_CSP_HIGH_DEPTH must be used to specify the
>>  *      colorspace depth as well. */
>> X264_API extern const int x264_bit_depth;
>
> Thanks, I missed these two in the documentation. FWIW, what's the point
> of defining them in x264_config.h too then?

People seemed to like the idea of having both.  If I had to guess,
accessing x264_bit_depth would require running a test program, which
isn't possible if you're cross-compiling.

Jason