170 lines
6.2 KiB
C
170 lines
6.2 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
|
||
|
|
* @ingroup lavfi_buffersink
|
||
|
|
* memory buffer sink API for audio and video
|
||
|
|
*/
|
||
|
|
|
||
|
|
#include "avfilter.h"
|
||
|
|
|
||
|
|
/**
|
||
|
|
* @defgroup lavfi_buffersink Buffer sink API
|
||
|
|
* @ingroup lavfi
|
||
|
|
* @{
|
||
|
|
*/
|
||
|
|
|
||
|
|
/**
|
||
|
|
* Get a frame with filtered data from sink and put it in frame.
|
||
|
|
*
|
||
|
|
* @param ctx pointer to a buffersink or abuffersink filter context.
|
||
|
|
* @param frame pointer to an allocated frame that will be filled with data.
|
||
|
|
* The data must be freed using av_frame_unref() / av_frame_free()
|
||
|
|
* @param flags a combination of AV_BUFFERSINK_FLAG_* flags
|
||
|
|
*
|
||
|
|
* @return >= 0 in for success, a negative AVERROR code for failure.
|
||
|
|
*/
|
||
|
|
int av_buffersink_get_frame_flags(AVFilterContext *ctx, AVFrame *frame, int flags);
|
||
|
|
|
||
|
|
/**
|
||
|
|
* 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
|
||
|
|
|
||
|
|
#if FF_API_NEXT
|
||
|
|
/**
|
||
|
|
* Struct to use for initializing a buffersink context.
|
||
|
|
*/
|
||
|
|
typedef struct AVBufferSinkParams {
|
||
|
|
const enum AVPixelFormat *pixel_fmts; ///< list of allowed pixel formats, terminated by AV_PIX_FMT_NONE
|
||
|
|
} AVBufferSinkParams;
|
||
|
|
|
||
|
|
/**
|
||
|
|
* Create an AVBufferSinkParams structure.
|
||
|
|
*
|
||
|
|
* Must be freed with av_free().
|
||
|
|
*/
|
||
|
|
attribute_deprecated
|
||
|
|
AVBufferSinkParams *av_buffersink_params_alloc(void);
|
||
|
|
|
||
|
|
/**
|
||
|
|
* Struct to use for initializing an abuffersink context.
|
||
|
|
*/
|
||
|
|
typedef struct AVABufferSinkParams {
|
||
|
|
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
|
||
|
|
const int *channel_counts; ///< list of allowed channel counts, terminated by -1
|
||
|
|
int all_channel_counts; ///< if not 0, accept any channel count or layout
|
||
|
|
int *sample_rates; ///< list of allowed sample rates, terminated by -1
|
||
|
|
} AVABufferSinkParams;
|
||
|
|
|
||
|
|
/**
|
||
|
|
* Create an AVABufferSinkParams structure.
|
||
|
|
*
|
||
|
|
* Must be freed with av_free().
|
||
|
|
*/
|
||
|
|
attribute_deprecated
|
||
|
|
AVABufferSinkParams *av_abuffersink_params_alloc(void);
|
||
|
|
#endif
|
||
|
|
|
||
|
|
/**
|
||
|
|
* Set the frame size for an audio buffer sink.
|
||
|
|
*
|
||
|
|
* All calls to av_buffersink_get_buffer_ref will return a buffer with
|
||
|
|
* exactly the specified number of samples, or AVERROR(EAGAIN) if there is
|
||
|
|
* not enough. The last buffer at EOF will be padded with 0.
|
||
|
|
*/
|
||
|
|
void av_buffersink_set_frame_size(AVFilterContext *ctx, unsigned frame_size);
|
||
|
|
|
||
|
|
/**
|
||
|
|
* @defgroup lavfi_buffersink_accessors Buffer sink accessors
|
||
|
|
* Get the properties of the stream
|
||
|
|
* @{
|
||
|
|
*/
|
||
|
|
|
||
|
|
enum AVMediaType av_buffersink_get_type (const AVFilterContext *ctx);
|
||
|
|
AVRational av_buffersink_get_time_base (const AVFilterContext *ctx);
|
||
|
|
int av_buffersink_get_format (const AVFilterContext *ctx);
|
||
|
|
|
||
|
|
AVRational av_buffersink_get_frame_rate (const AVFilterContext *ctx);
|
||
|
|
int av_buffersink_get_w (const AVFilterContext *ctx);
|
||
|
|
int av_buffersink_get_h (const AVFilterContext *ctx);
|
||
|
|
AVRational av_buffersink_get_sample_aspect_ratio (const AVFilterContext *ctx);
|
||
|
|
|
||
|
|
int av_buffersink_get_channels (const AVFilterContext *ctx);
|
||
|
|
uint64_t av_buffersink_get_channel_layout (const AVFilterContext *ctx);
|
||
|
|
int av_buffersink_get_sample_rate (const AVFilterContext *ctx);
|
||
|
|
|
||
|
|
AVBufferRef * av_buffersink_get_hw_frames_ctx (const AVFilterContext *ctx);
|
||
|
|
|
||
|
|
/** @} */
|
||
|
|
|
||
|
|
/**
|
||
|
|
* Get a frame with filtered data from sink and put it in frame.
|
||
|
|
*
|
||
|
|
* @param ctx pointer to a context of a buffersink or abuffersink AVFilter.
|
||
|
|
* @param frame pointer to an allocated frame that will be filled with data.
|
||
|
|
* The data must be freed using av_frame_unref() / av_frame_free()
|
||
|
|
*
|
||
|
|
* @return
|
||
|
|
* - >= 0 if a frame was successfully returned.
|
||
|
|
* - AVERROR(EAGAIN) if no frames are available at this point; more
|
||
|
|
* input frames must be added to the filtergraph to get more output.
|
||
|
|
* - AVERROR_EOF if there will be no more output frames on this sink.
|
||
|
|
* - A different negative AVERROR code in other failure cases.
|
||
|
|
*/
|
||
|
|
int av_buffersink_get_frame(AVFilterContext *ctx, AVFrame *frame);
|
||
|
|
|
||
|
|
/**
|
||
|
|
* Same as av_buffersink_get_frame(), but with the ability to specify the number
|
||
|
|
* of samples read. This function is less efficient than
|
||
|
|
* av_buffersink_get_frame(), because it copies the data around.
|
||
|
|
*
|
||
|
|
* @param ctx pointer to a context of the abuffersink AVFilter.
|
||
|
|
* @param frame pointer to an allocated frame that will be filled with data.
|
||
|
|
* The data must be freed using av_frame_unref() / av_frame_free()
|
||
|
|
* frame will contain exactly nb_samples audio samples, except at
|
||
|
|
* the end of stream, when it can contain less than nb_samples.
|
||
|
|
*
|
||
|
|
* @return The return codes have the same meaning as for
|
||
|
|
* av_buffersink_get_frame().
|
||
|
|
*
|
||
|
|
* @warning do not mix this function with av_buffersink_get_frame(). Use only one or
|
||
|
|
* the other with a single sink, not both.
|
||
|
|
*/
|
||
|
|
int av_buffersink_get_samples(AVFilterContext *ctx, AVFrame *frame, int nb_samples);
|
||
|
|
|
||
|
|
/**
|
||
|
|
* @}
|
||
|
|
*/
|
||
|
|
|
||
|
|
#endif /* AVFILTER_BUFFERSINK_H */
|