Buffer sink API

Граф связей класса Buffer sink API:

Группы
	Buffer sink accessors
	Get the properties of the stream.

Файлы
файл	buffersink.h

Классы
struct	AVBufferSinkParams
struct	AVABufferSinkParams

Определения типов
typedef struct AVBufferSinkParams	AVBufferSinkParams
typedef struct AVABufferSinkParams	AVABufferSinkParams

Функции
int	av_buffersink_get_frame_flags (AVFilterContext *ctx, AVFrame *frame, int flags)
AVBufferSinkParams *	av_buffersink_params_alloc (void)
AVABufferSinkParams *	av_abuffersink_params_alloc (void)
void	av_buffersink_set_frame_size (AVFilterContext *ctx, unsigned frame_size)
int	av_buffersink_get_frame (AVFilterContext *ctx, AVFrame *frame)
int	av_buffersink_get_samples (AVFilterContext *ctx, AVFrame *frame, int nb_samples)

Подробное описание

Типы

AVBufferSinkParams

typedef struct AVBufferSinkParams AVBufferSinkParams

#include <C:/git/world-of-might-and-magic/lib/win32/x86/ffmpeg-4.2.2/include/libavfilter/buffersink.h>

Struct to use for initializing a buffersink context.

AVABufferSinkParams

typedef struct AVABufferSinkParams AVABufferSinkParams

#include <C:/git/world-of-might-and-magic/lib/win32/x86/ffmpeg-4.2.2/include/libavfilter/buffersink.h>

Struct to use for initializing an abuffersink context.

Функции

av_buffersink_get_frame_flags()

int av_buffersink_get_frame_flags	(	AVFilterContext *	ctx,
		AVFrame *	frame,
		int	flags
	)

#include <C:/git/world-of-might-and-magic/lib/win32/x86/ffmpeg-4.2.2/include/libavfilter/buffersink.h>

Get a frame with filtered data from sink and put it in frame.

Аргументы

ctx	pointer to a buffersink or abuffersink filter context.
frame	pointer to an allocated frame that will be filled with data. The data must be freed using av_frame_unref() / av_frame_free()
flags	a combination of AV_BUFFERSINK_FLAG_* flags

Возвращает

>= 0 in for success, a negative AVERROR code for failure.

av_buffersink_params_alloc()

AVBufferSinkParams* av_buffersink_params_alloc

(

void

)

#include <C:/git/world-of-might-and-magic/lib/win32/x86/ffmpeg-4.2.2/include/libavfilter/buffersink.h>

Create an AVBufferSinkParams structure.

Must be freed with av_free().

av_abuffersink_params_alloc()

AVABufferSinkParams* av_abuffersink_params_alloc

(

void

)

#include <C:/git/world-of-might-and-magic/lib/win32/x86/ffmpeg-4.2.2/include/libavfilter/buffersink.h>

Create an AVABufferSinkParams structure.

Must be freed with av_free().

av_buffersink_set_frame_size()

void av_buffersink_set_frame_size	(	AVFilterContext *	ctx,
		unsigned	frame_size
	)

#include <C:/git/world-of-might-and-magic/lib/win32/x86/ffmpeg-4.2.2/include/libavfilter/buffersink.h>

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.

av_buffersink_get_frame()

int av_buffersink_get_frame	(	AVFilterContext *	ctx,
		AVFrame *	frame
	)

#include <C:/git/world-of-might-and-magic/lib/win32/x86/ffmpeg-4.2.2/include/libavfilter/buffersink.h>

Get a frame with filtered data from sink and put it in frame.

Аргументы

ctx	pointer to a context of a buffersink or abuffersink AVFilter.
frame	pointer to an allocated frame that will be filled with data. The data must be freed using av_frame_unref() / av_frame_free()

Возвращает

• >= 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.

av_buffersink_get_samples()

int av_buffersink_get_samples	(	AVFilterContext *	ctx,
		AVFrame *	frame,
		int	nb_samples
	)

#include <C:/git/world-of-might-and-magic/lib/win32/x86/ffmpeg-4.2.2/include/libavfilter/buffersink.h>

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.

Аргументы

ctx	pointer to a context of the abuffersink AVFilter.
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.

Возвращает

The return codes have the same meaning as for av_buffersink_get_frame().

Предупреждения

do not mix this function with av_buffersink_get_frame(). Use only one or the other with a single sink, not both.