mirror of
https://github.com/librempeg/librempeg
synced 2024-11-22 18:49:58 +00:00
133 lines
4.5 KiB
C
133 lines
4.5 KiB
C
/*
|
|
* 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_BUFFERSINK_H
|
|
#define AVFILTER_BUFFERSINK_H
|
|
|
|
/**
|
|
* @file
|
|
* memory buffer sink API for audio and video
|
|
*/
|
|
|
|
#include "avfilter.h"
|
|
|
|
/**
|
|
* Struct to use for initializing a buffersink context.
|
|
*/
|
|
typedef struct {
|
|
const enum PixelFormat *pixel_fmts; ///< list of allowed pixel formats, terminated by PIX_FMT_NONE
|
|
} AVBufferSinkParams;
|
|
|
|
/**
|
|
* Create an AVBufferSinkParams structure.
|
|
*
|
|
* Must be freed with av_free().
|
|
*/
|
|
AVBufferSinkParams *av_buffersink_params_alloc(void);
|
|
|
|
/**
|
|
* Struct to use for initializing an abuffersink context.
|
|
*/
|
|
typedef struct {
|
|
const enum AVSampleFormat *sample_fmts; ///< list of allowed sample formats, terminated by AV_SAMPLE_FMT_NONE
|
|
const int64_t *channel_layouts; ///< list of allowed channel layouts, terminated by -1
|
|
#if FF_API_PACKING
|
|
const int *packing_fmts; ///< list of allowed packing formats
|
|
#endif
|
|
} AVABufferSinkParams;
|
|
|
|
/**
|
|
* Create an AVABufferSinkParams structure.
|
|
*
|
|
* Must be freed with av_free().
|
|
*/
|
|
AVABufferSinkParams *av_abuffersink_params_alloc(void);
|
|
|
|
/**
|
|
* Tell av_buffersink_get_buffer_ref() to read video/samples buffer
|
|
* reference, but not remove it from the buffer. This is useful if you
|
|
* need only to read a video/samples buffer, without to fetch it.
|
|
*/
|
|
#define AV_BUFFERSINK_FLAG_PEEK 1
|
|
|
|
/**
|
|
* Tell av_buffersink_get_buffer_ref() not to request a frame from its input.
|
|
* If a frame is already buffered, it is read (and removed from the buffer),
|
|
* but if no frame is present, return AVERROR(EAGAIN).
|
|
*/
|
|
#define AV_BUFFERSINK_FLAG_NO_REQUEST 2
|
|
|
|
/**
|
|
* Get an audio/video buffer data from buffer_sink and put it in bufref.
|
|
*
|
|
* This function works with both audio and video buffer sinks.
|
|
*
|
|
* @param buffer_sink pointer to a buffersink or abuffersink context
|
|
* @param flags a combination of AV_BUFFERSINK_FLAG_* flags
|
|
* @return >= 0 in case of success, a negative AVERROR code in case of
|
|
* failure
|
|
*/
|
|
int av_buffersink_get_buffer_ref(AVFilterContext *buffer_sink,
|
|
AVFilterBufferRef **bufref, int flags);
|
|
|
|
|
|
/**
|
|
* Get the number of immediately available frames.
|
|
*/
|
|
int av_buffersink_poll_frame(AVFilterContext *ctx);
|
|
|
|
/**
|
|
* Get a buffer with filtered data from sink and put it in buf.
|
|
*
|
|
* @param sink pointer to a context of a buffersink or abuffersink AVFilter.
|
|
* @param buf pointer to the buffer will be written here if buf is non-NULL. buf
|
|
* must be freed by the caller using avfilter_unref_buffer().
|
|
* Buf may also be NULL to query whether a buffer is ready to be
|
|
* output.
|
|
*
|
|
* @return >= 0 in case of success, a negative AVERROR code in case of
|
|
* failure.
|
|
*/
|
|
int av_buffersink_read(AVFilterContext *sink, AVFilterBufferRef **buf);
|
|
|
|
/**
|
|
* Same as av_buffersink_read, but with the ability to specify the number of
|
|
* samples read. This function is less efficient than av_buffersink_read(),
|
|
* because it copies the data around.
|
|
*
|
|
* @param sink pointer to a context of the abuffersink AVFilter.
|
|
* @param buf pointer to the buffer will be written here if buf is non-NULL. buf
|
|
* must be freed by the caller using avfilter_unref_buffer(). buf
|
|
* will contain exactly nb_samples audio samples, except at the end
|
|
* of stream, when it can contain less than nb_samples.
|
|
* Buf may also be NULL to query whether a buffer is ready to be
|
|
* output.
|
|
*
|
|
* @warning do not mix this function with av_buffersink_read(). Use only one or
|
|
* the other with a single sink, not both.
|
|
*/
|
|
int av_buffersink_read_samples(AVFilterContext *ctx, AVFilterBufferRef **buf,
|
|
int nb_samples);
|
|
|
|
/**
|
|
* Get the frame rate of the input.
|
|
*/
|
|
AVRational av_buffersink_get_frame_rate(AVFilterContext *ctx);
|
|
|
|
#endif /* AVFILTER_BUFFERSINK_H */
|