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avutil/frame: also align data pointers in av_frame_get_buffer()

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This avoids unpleasant surprises to av_frame_get_buffer callers
that explicitly specified 64-byte alignment and didn't get
AVFrame.data pointers that are 64-byte aligned.

For example, see https://github.com/sekrit-twc/zimg/issues/212

Although the zscale issue has already been resolved by other means
it would still be prudent to improve the behavior of av_frame_get_buffer
to fix any unknown and future instances of similar issues.

Co-authored-by: James Almer <jamrial@gmail.com>
Signed-off-by: James Almer <jamrial@gmail.com>
This commit is contained in:
Pavel Koshevoy
2024-11-16 08:51:52 -07:00
committed by James Almer
parent ea91d978e3
commit 46cb7b8d9d
4 changed files with 25 additions and 9 deletions
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7
libavutil/frame.h
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@@ -887,9 +887,10 @@ void av_frame_move_ref(AVFrame *dst, AVFrame *src);
* cases.
*
* @param frame frame in which to store the new buffers.
* @param align Required buffer size alignment. If equal to 0, alignment will be
* chosen automatically for the current CPU. It is highly
* recommended to pass 0 here unless you know what you are doing.
* @param align Required buffer size and data pointer alignment. If equal to 0,
* alignment will be chosen automatically for the current CPU.
* It is highly recommended to pass 0 here unless you know what
* you are doing.
*
* @return 0 on success, a negative AVERROR on error.
*/