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swscale/utils: support bayer input + scaling, and bayer input + any supported output 

Fixes Ticket4053

Signed-off-by: Michael Niedermayer <michaelni@gmx.at>
This commit is contained in:
Michael Niedermayer 2014-11-12 23:53:08 +01:00
parent 173d51c982
commit 2f6bb86f85
1 changed files with 25 additions and 0 deletions
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25
libswscale/utils.c
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@ -1217,6 +1217,31 @@ av_cold int sws_init_context(SwsContext *c, SwsFilter *srcFilter,
}
}
if (isBayer(srcFormat)) {
if (!unscaled ||
(dstFormat != AV_PIX_FMT_RGB24 && dstFormat != AV_PIX_FMT_YUV420P)) {
enum AVPixelFormat tmpFormat = AV_PIX_FMT_RGB24;
ret = av_image_alloc(c->cascaded_tmp, c->cascaded_tmpStride,
srcW, srcH, tmpFormat, 64);
if (ret < 0)
return ret;
c->cascaded_context[0] = sws_getContext(srcW, srcH, srcFormat,
srcW, srcH, tmpFormat,
flags, srcFilter, NULL, c->param);
if (!c->cascaded_context[0])
return -1;
c->cascaded_context[1] = sws_getContext(srcW, srcH, tmpFormat,
dstW, dstH, dstFormat,
flags, NULL, dstFilter, c->param);
if (!c->cascaded_context[1])
return -1;
return 0;
}
}
#define USE_MMAP (HAVE_MMAP && HAVE_MPROTECT && defined MAP_ANONYMOUS)
/* precalculate horizontal scaler filter coefficients */