mirror of
https://github.com/FFmpeg/FFmpeg.git
synced 2024-11-21 10:55:51 +02:00
88 lines
3.3 KiB
C
88 lines
3.3 KiB
C
/*
|
|
* Copyright (c) 2007 Bobby Bingham
|
|
*
|
|
* This file is part of FFmpeg.
|
|
*
|
|
* FFmpeg is free software; you can redistribute it and/or
|
|
* modify it under the terms of the GNU Lesser General Public
|
|
* License as published by the Free Software Foundation; either
|
|
* version 2.1 of the License, or (at your option) any later version.
|
|
*
|
|
* FFmpeg is distributed in the hope that it will be useful,
|
|
* but WITHOUT ANY WARRANTY; without even the implied warranty of
|
|
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
|
|
* Lesser General Public License for more details.
|
|
*
|
|
* You should have received a copy of the GNU Lesser General Public
|
|
* License along with FFmpeg; if not, write to the Free Software
|
|
* Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA
|
|
*/
|
|
|
|
|
|
#ifndef AVFILTER_VIDEO_H
|
|
#define AVFILTER_VIDEO_H
|
|
|
|
#include "avfilter.h"
|
|
|
|
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);
|
|
|
|
/**
|
|
* Request a picture buffer with a specific set of permissions.
|
|
*
|
|
* @param link the output link to the filter from which the buffer will
|
|
* be requested
|
|
* @param perms the required access permissions
|
|
* @param w the minimum width of the buffer to allocate
|
|
* @param h the minimum height of the buffer to allocate
|
|
* @return A reference to the buffer. This must be unreferenced with
|
|
* avfilter_unref_buffer when you are finished with it.
|
|
*/
|
|
AVFilterBufferRef *ff_get_video_buffer(AVFilterLink *link, int perms,
|
|
int w, int h);
|
|
|
|
/**
|
|
* 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 */
|