diff options
Diffstat (limited to 'libavfilter/video.h')
| -rw-r--r-- | libavfilter/video.h | 21 |
1 files changed, 14 insertions, 7 deletions
diff --git a/libavfilter/video.h b/libavfilter/video.h index 28835b9bf9..e30980ea88 100644 --- a/libavfilter/video.h +++ b/libavfilter/video.h @@ -42,9 +42,9 @@ 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); -void ff_null_start_frame(AVFilterLink *link, AVFilterBufferRef *picref); -void ff_null_draw_slice(AVFilterLink *link, int y, int h, int slice_dir); -void ff_null_end_frame(AVFilterLink *link); +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. @@ -54,20 +54,25 @@ void ff_null_end_frame(AVFilterLink *link); * 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. */ -void ff_start_frame(AVFilterLink *link, AVFilterBufferRef *picref); +int ff_start_frame(AVFilterLink *link, AVFilterBufferRef *picref); /** * Pass video frame along and keep an internal reference for later use. */ -void ff_null_start_frame_keep_ref(AVFilterLink *inlink, AVFilterBufferRef *picref); +int ff_null_start_frame_keep_ref(AVFilterLink *inlink, 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 */ -void ff_end_frame(AVFilterLink *link); +int ff_end_frame(AVFilterLink *link); /** * Send a slice to the next filter. @@ -83,7 +88,9 @@ void ff_end_frame(AVFilterLink *link); * 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. */ -void ff_draw_slice(AVFilterLink *link, int y, int h, int slice_dir); +int ff_draw_slice(AVFilterLink *link, int y, int h, int slice_dir); #endif /* AVFILTER_VIDEO_H */ |