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lavfi: merge start_frame/draw_slice/end_frame

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Any alleged performance benefits gained from the split are purely
mythological and do not justify added code complexity.
This commit is contained in:
Anton Khirnov 2012-11-27 07:49:45 +01:00
parent bb6c67bb36
commit 565e4993c6
55 changed files with 633 additions and 1459 deletions
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47
libavfilter/video.h
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@ -39,51 +39,4 @@ AVFilterBufferRef *ff_null_get_video_buffer(AVFilterLink *link, int perms, int w
AVFilterBufferRef *ff_get_video_buffer(AVFilterLink *link, int perms,
int w, int h);
int ff_inplace_start_frame(AVFilterLink *link, AVFilterBufferRef *picref);
int ff_null_start_frame(AVFilterLink *link, AVFilterBufferRef *picref);
int ff_null_draw_slice(AVFilterLink *link, int y, int h, int slice_dir);
int ff_null_end_frame(AVFilterLink *link);
/**
* Notify the next filter of the start of a frame.
*
* @param link the output link the frame will be sent over
* @param picref A reference to the frame about to be sent. The data for this
* frame need only be valid once draw_slice() is called for that
* portion. The receiving filter will free this reference when
* it no longer needs it.
*
* @return >= 0 on success, a negative AVERROR on error. This function will
* unreference picref in case of error.
*/
int ff_start_frame(AVFilterLink *link, AVFilterBufferRef *picref);
/**
* Notify the next filter that the current frame has finished.
*
* @param link the output link the frame was sent over
*
* @return >= 0 on success, a negative AVERROR on error
*/
int ff_end_frame(AVFilterLink *link);
/**
* Send a slice to the next filter.
*
* Slices have to be provided in sequential order, either in
* top-bottom or bottom-top order. If slices are provided in
* non-sequential order the behavior of the function is undefined.
*
* @param link the output link over which the frame is being sent
* @param y offset in pixels from the top of the image for this slice
* @param h height of this slice in pixels
* @param slice_dir the assumed direction for sending slices,
* from the top slice to the bottom slice if the value is 1,
* from the bottom slice to the top slice if the value is -1,
* for other values the behavior of the function is undefined.
*
* @return >= 0 on success, a negative AVERROR on error.
*/
int ff_draw_slice(AVFilterLink *link, int y, int h, int slice_dir);
#endif /* AVFILTER_VIDEO_H */