From 9626d0e906f698504efb8652bac143b98d66b088 Mon Sep 17 00:00:00 2001
From: Michael Niedermayer <michaelni@gmx.at>
Date: Tue, 18 Jun 2013 16:39:23 +0200
Subject: [PATCH] avutil/frame: Try to align width to achive linesize[0]
alignment
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>
---
libavutil/frame.c | 12 ++++++++----
1 file changed, 8 insertions(+), 4 deletions(-)
diff --git a/libavutil/frame.c b/libavutil/frame.c
index 24ad0dd224a..7584ae35873 100644
--- a/libavutil/frame.c
+++ b/libavutil/frame.c
@@ -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);
--
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