audio_data.h

/*
 * 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"

int ff_sample_fmt_is_planar(enum AVSampleFormat sample_fmt, int channels);

struct AudioData {
    const AVClass *class;               
    uint8_t *data[AVRESAMPLE_MAX_CHANNELS]; 
    uint8_t *buffer;                    
    unsigned int buffer_size;           
    int allocated_samples;              
    int nb_samples;                     
    enum AVSampleFormat sample_fmt;     
    int channels;                       
    int allocated_channels;             
    int is_planar;                      
    int planes;                         
    int sample_size;                    
    int stride;                         
    int read_only;                      
    int allow_realloc;                  
    int ptr_align;                      
    int samples_align;                  
    const char *name;                   
};

int ff_audio_data_set_channels(AudioData *a, int channels);

int ff_audio_data_init(AudioData *a, uint8_t * const *src, int plane_size,
                       int channels, int nb_samples,
                       enum AVSampleFormat sample_fmt, int read_only,
                       const char *name);

AudioData *ff_audio_data_alloc(int channels, int nb_samples,
                               enum AVSampleFormat sample_fmt,
                               const char *name);

int ff_audio_data_realloc(AudioData *a, int nb_samples);

void ff_audio_data_free(AudioData **a);

int ff_audio_data_copy(AudioData *out, AudioData *in, ChannelMapInfo *map);

int ff_audio_data_combine(AudioData *dst, int dst_offset, AudioData *src,
                          int src_offset, int nb_samples);

void ff_audio_data_drain(AudioData *a, int nb_samples);

int ff_audio_data_add_to_fifo(AVAudioFifo *af, AudioData *a, int offset,
                              int nb_samples);

int ff_audio_data_read_from_fifo(AVAudioFifo *af, AudioData *a, int nb_samples);

#endif /* AVRESAMPLE_AUDIO_DATA_H */