#include <stdint.h>#include "libavutil/audio_fifo.h"#include "libavutil/log.h"#include "libavutil/samplefmt.h"#include "avresample.h"Go to the source code of this file.
Data Structures | |
| struct | AudioData |
| Audio buffer used for intermediate storage between conversion phases. More... | |
Functions | |
| int | ff_audio_data_set_channels (AudioData *a, int channels) |
| int | ff_audio_data_init (AudioData *a, void **src, int plane_size, int channels, int nb_samples, enum AVSampleFormat sample_fmt, int read_only, const char *name) |
| Initialize AudioData using a given source. | |
| AudioData * | ff_audio_data_alloc (int channels, int nb_samples, enum AVSampleFormat sample_fmt, const char *name) |
| Allocate AudioData. | |
| int | ff_audio_data_realloc (AudioData *a, int nb_samples) |
| Reallocate AudioData. | |
| void | ff_audio_data_free (AudioData **a) |
| Free AudioData. | |
| int | ff_audio_data_copy (AudioData *out, AudioData *in) |
| Copy data from one AudioData to another. | |
| int | ff_audio_data_combine (AudioData *dst, int dst_offset, AudioData *src, int src_offset, int nb_samples) |
| Append data from one AudioData to the end of another. | |
| void | ff_audio_data_drain (AudioData *a, int nb_samples) |
| Drain samples from the start of the AudioData. | |
| int | ff_audio_data_add_to_fifo (AVAudioFifo *af, AudioData *a, int offset, int nb_samples) |
| Add samples in AudioData to an AVAudioFifo. | |
| int | ff_audio_data_read_from_fifo (AVAudioFifo *af, AudioData *a, int nb_samples) |
| Read samples from an AVAudioFifo to AudioData. | |
| int ff_audio_data_add_to_fifo | ( | AVAudioFifo * | af, | |
| AudioData * | a, | |||
| int | offset, | |||
| int | nb_samples | |||
| ) |
Add samples in AudioData to an AVAudioFifo.
| af | Audio FIFO Buffer | |
| a | AudioData struct | |
| offset | number of samples to skip from the start of the data | |
| nb_samples | number of samples to add to the FIFO |
Definition at line 316 of file audio_data.c.
Referenced by avresample_set_compensation(), and handle_buffered_output().
| AudioData* ff_audio_data_alloc | ( | int | channels, | |
| int | nb_samples, | |||
| enum AVSampleFormat | sample_fmt, | |||
| const char * | name | |||
| ) |
Allocate AudioData.
This allocates an internal buffer and sets audio parameters.
| channels | channel count | |
| nb_samples | number of samples to allocate space for | |
| sample_fmt | sample format | |
| name | name for debug logging (can be NULL) |
Definition at line 110 of file audio_data.c.
Referenced by avresample_open(), avresample_set_compensation(), and ff_audio_resample_init().
| int ff_audio_data_combine | ( | AudioData * | dst, | |
| int | dst_offset, | |||
| AudioData * | src, | |||
| int | src_offset, | |||
| int | nb_samples | |||
| ) |
Append data from one AudioData to the end of another.
| dst | destination AudioData | |
| dst_offset | offset, in samples, to start writing, relative to the start of dst | |
| src | source AudioData | |
| src_offset | offset, in samples, to start copying, relative to the start of the src | |
| nb_samples | number of samples to copy |
Definition at line 243 of file audio_data.c.
Referenced by ff_audio_resample().
Copy data from one AudioData to another.
Definition at line 216 of file audio_data.c.
Referenced by avresample_convert(), and handle_buffered_output().
Drain samples from the start of the AudioData.
Remaining samples are shifted to the start of the AudioData.
| a | AudioData struct | |
| nb_samples | number of samples to drain |
Definition at line 299 of file audio_data.c.
Referenced by ff_audio_resample().
| void ff_audio_data_free | ( | AudioData ** | a | ) |
Free AudioData.
The AudioData must have been previously allocated with ff_audio_data_alloc().
| a | AudioData struct |
Definition at line 208 of file audio_data.c.
Referenced by avresample_close(), avresample_set_compensation(), ff_audio_resample_free(), and ff_audio_resample_init().
| int ff_audio_data_init | ( | AudioData * | a, | |
| void ** | src, | |||
| int | plane_size, | |||
| int | channels, | |||
| int | nb_samples, | |||
| enum AVSampleFormat | sample_fmt, | |||
| int | read_only, | |||
| const char * | name | |||
| ) |
Initialize AudioData using a given source.
This does not allocate an internal buffer. It only sets the data pointers and audio parameters.
| a | AudioData struct | |
| src | source data pointers | |
| plane_size | plane size, in bytes. This can be 0 if unknown, but that will lead to optimized functions not being used in many cases, which could slow down some conversions. | |
| channels | channel count | |
| nb_samples | number of samples in the source data | |
| sample_fmt | sample format | |
| read_only | indicates if buffer is read only or read/write | |
| name | name for debug logging (can be NULL) |
Definition at line 65 of file audio_data.c.
Referenced by avresample_convert().
| int ff_audio_data_read_from_fifo | ( | AVAudioFifo * | af, | |
| AudioData * | a, | |||
| int | nb_samples | |||
| ) |
Read samples from an AVAudioFifo to AudioData.
| af | Audio FIFO Buffer | |
| a | AudioData struct | |
| nb_samples | number of samples to read from the FIFO |
Definition at line 331 of file audio_data.c.
Referenced by avresample_set_compensation(), and handle_buffered_output().
Reallocate AudioData.
The AudioData must have been previously allocated with ff_audio_data_alloc().
| a | AudioData struct | |
| nb_samples | number of samples to allocate space for |
Definition at line 153 of file audio_data.c.
Referenced by avresample_convert(), ff_audio_data_alloc(), ff_audio_data_combine(), ff_audio_data_copy(), ff_audio_data_read_from_fifo(), and ff_audio_resample().
1.5.8