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libavcodec/imgconvert.c: support left band while cropping

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Signed-off-by: Michael Niedermayer <michaelni@gmx.at>
This commit is contained in:
Przemysław Sobala 2015-06-12 18:38:05 +02:00 committed by Michael Niedermayer
parent d0061e77cd
commit c39637f36a
1 changed files with 3 additions and 3 deletions
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6
libavcodec/imgconvert.c
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@ -201,12 +201,14 @@ int av_picture_crop(AVPicture *dst, const AVPicture *src,
const AVPixFmtDescriptor *desc = av_pix_fmt_desc_get(pix_fmt);
int y_shift;
int x_shift;
int max_step[4];
if (pix_fmt < 0 || pix_fmt >= AV_PIX_FMT_NB)
return -1;
y_shift = desc->log2_chroma_h;
x_shift = desc->log2_chroma_w;
av_image_fill_max_pixsteps(max_step, NULL, desc);
if (is_yuv_planar(desc)) {
dst->data[0] = src->data[0] + (top_band * src->linesize[0]) + left_band;
@ -215,9 +217,7 @@ int av_picture_crop(AVPicture *dst, const AVPicture *src,
} else{
if(top_band % (1<<y_shift) || left_band % (1<<x_shift))
return -1;
if(left_band) //FIXME add support for this too
return -1;
dst->data[0] = src->data[0] + (top_band * src->linesize[0]) + left_band;
dst->data[0] = src->data[0] + (top_band * src->linesize[0]) + (left_band * max_step[0]);
}
dst->linesize[0] = src->linesize[0];