176 lines
6.8 KiB
C
176 lines
6.8 KiB
C
/*
|
|
* Copyright (c) 2012 Justin Ruggles <justin.ruggles@gmail.com>
|
|
*
|
|
* 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 AVRESAMPLE_AUDIO_DATA_H
|
|
#define AVRESAMPLE_AUDIO_DATA_H
|
|
|
|
#include <stdint.h>
|
|
|
|
#include "libavutil/audio_fifo.h"
|
|
#include "libavutil/log.h"
|
|
#include "libavutil/samplefmt.h"
|
|
#include "avresample.h"
|
|
#include "internal.h"
|
|
|
|
/**
|
|
* Audio buffer used for intermediate storage between conversion phases.
|
|
*/
|
|
struct AudioData {
|
|
const AVClass *class; /**< AVClass for logging */
|
|
uint8_t *data[AVRESAMPLE_MAX_CHANNELS]; /**< data plane pointers */
|
|
uint8_t *buffer; /**< data buffer */
|
|
unsigned int buffer_size; /**< allocated buffer size */
|
|
int allocated_samples; /**< number of samples the buffer can hold */
|
|
int nb_samples; /**< current number of samples */
|
|
enum AVSampleFormat sample_fmt; /**< sample format */
|
|
int channels; /**< channel count */
|
|
int allocated_channels; /**< allocated channel count */
|
|
int is_planar; /**< sample format is planar */
|
|
int planes; /**< number of data planes */
|
|
int sample_size; /**< bytes per sample */
|
|
int stride; /**< sample byte offset within a plane */
|
|
int read_only; /**< data is read-only */
|
|
int allow_realloc; /**< realloc is allowed */
|
|
int ptr_align; /**< minimum data pointer alignment */
|
|
int samples_align; /**< allocated samples alignment */
|
|
const char *name; /**< name for debug logging */
|
|
};
|
|
|
|
int ff_audio_data_set_channels(AudioData *a, int channels);
|
|
|
|
/**
|
|
* Initialize AudioData using a given source.
|
|
*
|
|
* This does not allocate an internal buffer. It only sets the data pointers
|
|
* and audio parameters.
|
|
*
|
|
* @param a AudioData struct
|
|
* @param src source data pointers
|
|
* @param 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.
|
|
* @param channels channel count
|
|
* @param nb_samples number of samples in the source data
|
|
* @param sample_fmt sample format
|
|
* @param read_only indicates if buffer is read only or read/write
|
|
* @param name name for debug logging (can be NULL)
|
|
* @return 0 on success, negative AVERROR value on error
|
|
*/
|
|
int ff_audio_data_init(AudioData *a, uint8_t **src, int plane_size, int channels,
|
|
int nb_samples, enum AVSampleFormat sample_fmt,
|
|
int read_only, const char *name);
|
|
|
|
/**
|
|
* Allocate AudioData.
|
|
*
|
|
* This allocates an internal buffer and sets audio parameters.
|
|
*
|
|
* @param channels channel count
|
|
* @param nb_samples number of samples to allocate space for
|
|
* @param sample_fmt sample format
|
|
* @param name name for debug logging (can be NULL)
|
|
* @return newly allocated AudioData struct, or NULL on error
|
|
*/
|
|
AudioData *ff_audio_data_alloc(int channels, int nb_samples,
|
|
enum AVSampleFormat sample_fmt,
|
|
const char *name);
|
|
|
|
/**
|
|
* Reallocate AudioData.
|
|
*
|
|
* The AudioData must have been previously allocated with ff_audio_data_alloc().
|
|
*
|
|
* @param a AudioData struct
|
|
* @param nb_samples number of samples to allocate space for
|
|
* @return 0 on success, negative AVERROR value on error
|
|
*/
|
|
int ff_audio_data_realloc(AudioData *a, int nb_samples);
|
|
|
|
/**
|
|
* Free AudioData.
|
|
*
|
|
* The AudioData must have been previously allocated with ff_audio_data_alloc().
|
|
*
|
|
* @param a AudioData struct
|
|
*/
|
|
void ff_audio_data_free(AudioData **a);
|
|
|
|
/**
|
|
* Copy data from one AudioData to another.
|
|
*
|
|
* @param out output AudioData
|
|
* @param in input AudioData
|
|
* @param map channel map, NULL if not remapping
|
|
* @return 0 on success, negative AVERROR value on error
|
|
*/
|
|
int ff_audio_data_copy(AudioData *out, AudioData *in, ChannelMapInfo *map);
|
|
|
|
/**
|
|
* Append data from one AudioData to the end of another.
|
|
*
|
|
* @param dst destination AudioData
|
|
* @param dst_offset offset, in samples, to start writing, relative to the
|
|
* start of dst
|
|
* @param src source AudioData
|
|
* @param src_offset offset, in samples, to start copying, relative to the
|
|
* start of the src
|
|
* @param nb_samples number of samples to copy
|
|
* @return 0 on success, negative AVERROR value on error
|
|
*/
|
|
int ff_audio_data_combine(AudioData *dst, int dst_offset, AudioData *src,
|
|
int src_offset, int nb_samples);
|
|
|
|
/**
|
|
* Drain samples from the start of the AudioData.
|
|
*
|
|
* Remaining samples are shifted to the start of the AudioData.
|
|
*
|
|
* @param a AudioData struct
|
|
* @param nb_samples number of samples to drain
|
|
*/
|
|
void ff_audio_data_drain(AudioData *a, int nb_samples);
|
|
|
|
/**
|
|
* Add samples in AudioData to an AVAudioFifo.
|
|
*
|
|
* @param af Audio FIFO Buffer
|
|
* @param a AudioData struct
|
|
* @param offset number of samples to skip from the start of the data
|
|
* @param nb_samples number of samples to add to the FIFO
|
|
* @return number of samples actually added to the FIFO, or
|
|
* negative AVERROR code on error
|
|
*/
|
|
int ff_audio_data_add_to_fifo(AVAudioFifo *af, AudioData *a, int offset,
|
|
int nb_samples);
|
|
|
|
/**
|
|
* Read samples from an AVAudioFifo to AudioData.
|
|
*
|
|
* @param af Audio FIFO Buffer
|
|
* @param a AudioData struct
|
|
* @param nb_samples number of samples to read from the FIFO
|
|
* @return number of samples actually read from the FIFO, or
|
|
* negative AVERROR code on error
|
|
*/
|
|
int ff_audio_data_read_from_fifo(AVAudioFifo *af, AudioData *a, int nb_samples);
|
|
|
|
#endif /* AVRESAMPLE_AUDIO_DATA_H */
|