libavfilter/video.h File Reference

#include "avfilter.h"

Go to the source code of this file.

Functions
AVFilterBufferRef *	ff_default_get_video_buffer (AVFilterLink *link, int perms, int w, int h)
AVFilterBufferRef *	ff_null_get_video_buffer (AVFilterLink *link, int perms, int w, int h)
AVFilterBufferRef *	ff_get_video_buffer (AVFilterLink *link, int perms, int w, int h)
	Request a picture buffer with a specific set of permissions.
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)
int	ff_start_frame (AVFilterLink *link, AVFilterBufferRef *picref)
	Notify the next filter of the start of a frame.
int	ff_null_start_frame_keep_ref (AVFilterLink *inlink, AVFilterBufferRef *picref)
	Pass video frame along and keep an internal reference for later use.
int	ff_end_frame (AVFilterLink *link)
	Notify the next filter that the current frame has finished.
int	ff_draw_slice (AVFilterLink *link, int y, int h, int slice_dir)
	Send a slice to the next filter.

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Function Documentation

AVFilterBufferRef* ff_default_get_video_buffer	(	AVFilterLink *	link,
		int	perms,
		int	w,
		int	h
	)

Definition at line 39 of file video.c.

Referenced by ff_get_video_buffer(), and get_video_buffer().

int ff_draw_slice	(	AVFilterLink *	link,
		int	y,
		int	h,
		int	slice_dir
	)

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.

Parameters:

	link	the output link over which the frame is being sent
	y	offset in pixels from the top of the image for this slice
	h	height of this slice in pixels
	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.

Returns:

>= 0 on success, a negative AVERROR on error.

Definition at line 366 of file video.c.

Referenced by default_draw_slice(), draw_frame(), draw_send_bar_slice(), draw_slice(), draw_slice_main(), end_frame(), end_last_frame(), ff_null_draw_slice(), movie_push_frame(), push_frame(), request_frame(), return_frame(), try_push_frame(), and vf_next_put_image().

int ff_end_frame

(

AVFilterLink *

link

)

Notify the next filter that the current frame has finished.

Parameters:

link

the output link the frame was sent over

Returns:

>= 0 on success, a negative AVERROR on error

Definition at line 334 of file video.c.

Referenced by default_end_frame(), end_frame(), end_frame_main(), end_last_frame(), ff_null_end_frame(), movie_push_frame(), push_frame(), request_frame(), return_frame(), try_push_frame(), and vf_next_put_image().

AVFilterBufferRef* ff_get_video_buffer	(	AVFilterLink *	link,
		int	perms,
		int	w,
		int	h
	)

Request a picture buffer with a specific set of permissions.

Parameters:

	link	the output link to the filter from which the buffer will be requested
	perms	the required access permissions
	w	the minimum width of the buffer to allocate
	h	the minimum height of the buffer to allocate

Returns:

A reference to the buffer. This must be unreferenced with avfilter_unref_buffer when you are finished with it.

Definition at line 140 of file video.c.

Referenced by config_output(), default_start_frame(), end_frame(), ff_copy_buffer_ref(), ff_inplace_start_frame(), ff_null_get_video_buffer(), ff_start_frame(), filter_samples(), get_video_buffer(), request_frame(), return_frame(), source_request_frame(), and start_frame().

int ff_inplace_start_frame	(	AVFilterLink *	link,
		AVFilterBufferRef *	picref
	)

Definition at line 171 of file video.c.

int ff_null_draw_slice	(	AVFilterLink *	link,
		int	y,
		int	h,
		int	slice_dir
	)

Definition at line 349 of file video.c.

Referenced by draw_slice().

int ff_null_end_frame

(

AVFilterLink *

link

)

Definition at line 316 of file video.c.

Referenced by end_frame().

AVFilterBufferRef* ff_null_get_video_buffer	(	AVFilterLink *	link,
		int	perms,
		int	w,
		int	h
	)

Definition at line 34 of file video.c.

Referenced by get_video_buffer().

int ff_null_start_frame	(	AVFilterLink *	link,
		AVFilterBufferRef *	picref
	)

Definition at line 162 of file video.c.

Referenced by start_frame().

int ff_null_start_frame_keep_ref	(	AVFilterLink *	inlink,
		AVFilterBufferRef *	picref
	)

Pass video frame along and keep an internal reference for later use.

int ff_start_frame	(	AVFilterLink *	link,
		AVFilterBufferRef *	picref
	)

Notify the next filter of the start of a frame.

Parameters:

	link	the output link the frame will be sent over
	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.

Returns:

>= 0 on success, a negative AVERROR on error. This function will unreference picref in case of error.

Definition at line 241 of file video.c.

Referenced by default_start_frame(), end_frame(), end_last_frame(), ff_inplace_start_frame(), ff_null_start_frame(), filter_frame(), movie_push_frame(), process_frame(), push_frame(), request_frame(), return_frame(), source_request_frame(), start_frame(), try_start_frame(), and vf_next_put_image().