Audio FIFO Buffer

Граф связей класса Audio FIFO Buffer:

Определения типов
typedef struct AVAudioFifo	AVAudioFifo

Функции
void	av_audio_fifo_free (AVAudioFifo *af)
AVAudioFifo *	av_audio_fifo_alloc (enum AVSampleFormat sample_fmt, int channels, int nb_samples)
av_warn_unused_result int	av_audio_fifo_realloc (AVAudioFifo *af, int nb_samples)
int	av_audio_fifo_write (AVAudioFifo *af, void **data, int nb_samples)
int	av_audio_fifo_peek (AVAudioFifo *af, void **data, int nb_samples)
int	av_audio_fifo_peek_at (AVAudioFifo *af, void **data, int nb_samples, int offset)
int	av_audio_fifo_read (AVAudioFifo *af, void **data, int nb_samples)
int	av_audio_fifo_drain (AVAudioFifo *af, int nb_samples)
void	av_audio_fifo_reset (AVAudioFifo *af)
int	av_audio_fifo_size (AVAudioFifo *af)
int	av_audio_fifo_space (AVAudioFifo *af)

Подробное описание

Типы

AVAudioFifo

typedef struct AVAudioFifo AVAudioFifo

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

Context for an Audio FIFO Buffer.

• Operates at the sample level rather than the byte level.
• Supports multiple channels with either planar or packed sample format.
• Automatic reallocation when writing to a full buffer.

См. определение в файле audio_fifo.h строка 49

Функции

av_audio_fifo_free()

void av_audio_fifo_free

(

AVAudioFifo *

af

)

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

Free an AVAudioFifo.

Аргументы

af	AVAudioFifo to free

av_audio_fifo_alloc()

AVAudioFifo* av_audio_fifo_alloc	(	enum AVSampleFormat	sample_fmt,
		int	channels,
		int	nb_samples
	)

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

Allocate an AVAudioFifo.

Аргументы

sample_fmt	sample format
channels	number of channels
nb_samples	initial allocation size, in samples

Возвращает

newly allocated AVAudioFifo, or NULL on error

av_audio_fifo_realloc()

av_warn_unused_result int av_audio_fifo_realloc	(	AVAudioFifo *	af,
		int	nb_samples
	)

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

Reallocate an AVAudioFifo.

Аргументы

af	AVAudioFifo to reallocate
nb_samples	new allocation size, in samples

Возвращает

0 if OK, or negative AVERROR code on failure

av_audio_fifo_write()

int av_audio_fifo_write	(	AVAudioFifo *	af,
		void **	data,
		int	nb_samples
	)

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

Write data to an AVAudioFifo.

The AVAudioFifo will be reallocated automatically if the available space is less than nb_samples.

См. также

enum AVSampleFormat The documentation for AVSampleFormat describes the data layout.

Аргументы

af	AVAudioFifo to write to
data	audio data plane pointers
nb_samples	number of samples to write

Возвращает

number of samples actually written, or negative AVERROR code on failure. If successful, the number of samples actually written will always be nb_samples.

av_audio_fifo_peek()

int av_audio_fifo_peek	(	AVAudioFifo *	af,
		void **	data,
		int	nb_samples
	)

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

Peek data from an AVAudioFifo.

См. также

enum AVSampleFormat The documentation for AVSampleFormat describes the data layout.

Аргументы

af	AVAudioFifo to read from
data	audio data plane pointers
nb_samples	number of samples to peek

Возвращает

number of samples actually peek, or negative AVERROR code on failure. The number of samples actually peek will not be greater than nb_samples, and will only be less than nb_samples if av_audio_fifo_size is less than nb_samples.

av_audio_fifo_peek_at()

int av_audio_fifo_peek_at	(	AVAudioFifo *	af,
		void **	data,
		int	nb_samples,
		int	offset
	)

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

Peek data from an AVAudioFifo.

См. также

enum AVSampleFormat The documentation for AVSampleFormat describes the data layout.

Аргументы

af	AVAudioFifo to read from
data	audio data plane pointers
nb_samples	number of samples to peek
offset	offset from current read position

Возвращает

number of samples actually peek, or negative AVERROR code on failure. The number of samples actually peek will not be greater than nb_samples, and will only be less than nb_samples if av_audio_fifo_size is less than nb_samples.

av_audio_fifo_read()

int av_audio_fifo_read	(	AVAudioFifo *	af,
		void **	data,
		int	nb_samples
	)

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

Read data from an AVAudioFifo.

См. также

enum AVSampleFormat The documentation for AVSampleFormat describes the data layout.

Аргументы

af	AVAudioFifo to read from
data	audio data plane pointers
nb_samples	number of samples to read

Возвращает

number of samples actually read, or negative AVERROR code on failure. The number of samples actually read will not be greater than nb_samples, and will only be less than nb_samples if av_audio_fifo_size is less than nb_samples.

av_audio_fifo_drain()

int av_audio_fifo_drain	(	AVAudioFifo *	af,
		int	nb_samples
	)

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

Drain data from an AVAudioFifo.

Removes the data without reading it.

Аргументы

af	AVAudioFifo to drain
nb_samples	number of samples to drain

Возвращает

0 if OK, or negative AVERROR code on failure

av_audio_fifo_reset()

void av_audio_fifo_reset

(

AVAudioFifo *

af

)

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

Reset the AVAudioFifo buffer.

This empties all data in the buffer.

Аргументы

af	AVAudioFifo to reset

av_audio_fifo_size()

int av_audio_fifo_size

(

AVAudioFifo *

af

)

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

Get the current number of samples in the AVAudioFifo available for reading.

Аргументы

af	the AVAudioFifo to query

Возвращает

number of samples available for reading

av_audio_fifo_space()

int av_audio_fifo_space

(

AVAudioFifo *

af

)

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

Get the current number of samples in the AVAudioFifo available for writing.

Аргументы

af	the AVAudioFifo to query

Возвращает

number of samples available for writing