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/*
audio/pcm.cc
This file is part of the Osirion project and is distributed under
the terms of the GNU General Public License version 2
*/
#include <stdlib.h>
#include <string.h>
#include <cassert>
#include "audio/pcm.h"
#include "audio/wavfile.h"
namespace audio
{
PCM::PCM(unsigned int samplerate, unsigned int bitspersample, unsigned int channels, size_t size)
{
pcm_size = size;
pcm_buff_size = size;
pcm_bitspersample = bitspersample;
pcm_samplerate = samplerate;
pcm_channels = channels;
pcm_data = (unsigned char *) malloc(pcm_buff_size);
clear();
}
PCM::~PCM()
{
free(pcm_data);
}
void PCM::clear()
{
memset(pcm_data, 0, pcm_buff_size);
}
void PCM::set_size(size_t size) {
assert(size <= pcm_buff_size);
pcm_size = size;
}
void PCM::grow(size_t size) {
assert (size >= pcm_buff_size);
// store a pointer to the previous buffer
unsigned char *old_data = pcm_data;
// allocate a new, larger buffer
pcm_buff_size = size;
pcm_data = (unsigned char *) malloc(pcm_buff_size);
// copy the content
memcpy(pcm_data, old_data, pcm_size);
free(old_data);
}
} // namespace audio
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