mirror of
https://git.ffmpeg.org/ffmpeg.git
synced 2024-12-21 23:10:13 +00:00
b0012de420
The PUSH flags is necessary for efficient scheduling; otherwise there is no feedback when adding frames to closed paths. The NO_CHECK_FORMAT is a small optimization that does not cost much to implement. The KEEP_REF flag maps to the add/write distinction in the fork's API.
149 lines
4.6 KiB
C
149 lines
4.6 KiB
C
/*
|
|
*
|
|
* This file is part of Libav.
|
|
*
|
|
* Libav 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.
|
|
*
|
|
* Libav 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 Libav; if not, write to the Free Software
|
|
* Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA
|
|
*/
|
|
|
|
#ifndef AVFILTER_BUFFERSRC_H
|
|
#define AVFILTER_BUFFERSRC_H
|
|
|
|
/**
|
|
* @file
|
|
* Memory buffer source API.
|
|
*/
|
|
|
|
#include "libavcodec/avcodec.h"
|
|
#include "avfilter.h"
|
|
|
|
enum {
|
|
|
|
/**
|
|
* Do not check for format changes.
|
|
*/
|
|
AV_BUFFERSRC_FLAG_NO_CHECK_FORMAT = 1,
|
|
|
|
#if FF_API_AVFILTERBUFFER
|
|
/**
|
|
* Ignored
|
|
*/
|
|
AV_BUFFERSRC_FLAG_NO_COPY = 2,
|
|
#endif
|
|
|
|
/**
|
|
* Immediately push the frame to the output.
|
|
*/
|
|
AV_BUFFERSRC_FLAG_PUSH = 4,
|
|
|
|
/**
|
|
* Keep a reference to the frame.
|
|
* If the frame if reference-counted, create a new reference; otherwise
|
|
* copy the frame data.
|
|
*/
|
|
AV_BUFFERSRC_FLAG_KEEP_REF = 8,
|
|
|
|
};
|
|
|
|
/**
|
|
* Add buffer data in picref to buffer_src.
|
|
*
|
|
* @param buffer_src pointer to a buffer source context
|
|
* @param picref a buffer reference, or NULL to mark EOF
|
|
* @param flags a combination of AV_BUFFERSRC_FLAG_*
|
|
* @return >= 0 in case of success, a negative AVERROR code
|
|
* in case of failure
|
|
*/
|
|
int av_buffersrc_add_ref(AVFilterContext *buffer_src,
|
|
AVFilterBufferRef *picref, int flags);
|
|
|
|
/**
|
|
* Get the number of failed requests.
|
|
*
|
|
* A failed request is when the request_frame method is called while no
|
|
* frame is present in the buffer.
|
|
* The number is reset when a frame is added.
|
|
*/
|
|
unsigned av_buffersrc_get_nb_failed_requests(AVFilterContext *buffer_src);
|
|
|
|
#if FF_API_AVFILTERBUFFER
|
|
/**
|
|
* Add a buffer to the filtergraph s.
|
|
*
|
|
* @param buf buffer containing frame data to be passed down the filtergraph.
|
|
* This function will take ownership of buf, the user must not free it.
|
|
* A NULL buf signals EOF -- i.e. no more frames will be sent to this filter.
|
|
*
|
|
* @deprecated use av_buffersrc_write_frame() or av_buffersrc_add_frame()
|
|
*/
|
|
attribute_deprecated
|
|
int av_buffersrc_buffer(AVFilterContext *s, AVFilterBufferRef *buf);
|
|
#endif
|
|
|
|
/**
|
|
* Add a frame to the buffer source.
|
|
*
|
|
* @param s an instance of the buffersrc filter.
|
|
* @param frame frame to be added. If the frame is reference counted, this
|
|
* function will make a new reference to it. Otherwise the frame data will be
|
|
* copied.
|
|
*
|
|
* @return 0 on success, a negative AVERROR on error
|
|
*
|
|
* This function is equivalent to av_buffersrc_add_frame_flags() with the
|
|
* AV_BUFFERSRC_FLAG_KEEP_REF flag.
|
|
*/
|
|
int av_buffersrc_write_frame(AVFilterContext *s, const AVFrame *frame);
|
|
|
|
/**
|
|
* Add a frame to the buffer source.
|
|
*
|
|
* @param s an instance of the buffersrc filter.
|
|
* @param frame frame to be added. If the frame is reference counted, this
|
|
* function will take ownership of the reference(s) and reset the frame.
|
|
* Otherwise the frame data will be copied. If this function returns an error,
|
|
* the input frame is not touched.
|
|
*
|
|
* @return 0 on success, a negative AVERROR on error.
|
|
*
|
|
* @note the difference between this function and av_buffersrc_write_frame() is
|
|
* that av_buffersrc_write_frame() creates a new reference to the input frame,
|
|
* while this function takes ownership of the reference passed to it.
|
|
*
|
|
* This function is equivalent to av_buffersrc_add_frame_flags() without the
|
|
* AV_BUFFERSRC_FLAG_KEEP_REF flag.
|
|
*/
|
|
int av_buffersrc_add_frame(AVFilterContext *ctx, AVFrame *frame);
|
|
|
|
/**
|
|
* Add a frame to the buffer source.
|
|
*
|
|
* By default, if the frame is reference-counted, this function will take
|
|
* ownership of the reference(s) and reset the frame. This can be controled
|
|
* using the flags.
|
|
*
|
|
* If this function returns an error, the input frame is not touched.
|
|
*
|
|
* @param buffer_src pointer to a buffer source context
|
|
* @param frame a frame, or NULL to mark EOF
|
|
* @param flags a combination of AV_BUFFERSRC_FLAG_*
|
|
* @return >= 0 in case of success, a negative AVERROR code
|
|
* in case of failure
|
|
*/
|
|
int av_buffersrc_add_frame_flags(AVFilterContext *buffer_src,
|
|
AVFrame *frame, int flags);
|
|
|
|
|
|
#endif /* AVFILTER_BUFFERSRC_H */
|