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avutil/frame: Try to align width to achive linesize[0] alignment

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This results in more alignment for pixel formats that have "odd" pixel
sizes like RGB24. It makes access through SIMD easier

Works around Issue described in Ticket1031

Signed-off-by: Michael Niedermayer <michaelni@gmx.at>
This commit is contained in:
Michael Niedermayer 2013-06-18 16:39:23 +02:00
parent e41bf19d2c
commit 9626d0e906
1 changed files with 8 additions and 4 deletions
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12
libavutil/frame.c
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@ -126,10 +126,14 @@ static int get_video_buffer(AVFrame *frame, int align)
return ret;
if (!frame->linesize[0]) {
ret = av_image_fill_linesizes(frame->linesize, frame->format,
frame->width);
if (ret < 0)
return ret;
for(i=1; i<=align; i+=i) {
ret = av_image_fill_linesizes(frame->linesize, frame->format,
FFALIGN(frame->width, i));
if (ret < 0)
return ret;
if (!(frame->linesize[0] & (align-1)))
break;
}
for (i = 0; i < 4 && frame->linesize[i]; i++)
frame->linesize[i] = FFALIGN(frame->linesize[i], align);