/* Copyright (C) 2015 J.F.Dockes
* This program is free software; you can redistribute it and/or modify
* it under the terms of the GNU General Public License as published by
* the Free Software Foundation; either version 2 of the License, or
* (at your option) any later version.
*
* This program 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 General Public License for more details.
*
* You should have received a copy of the GNU General Public License
* along with this program; if not, write to the
* Free Software Foundation, Inc.,
* 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA.
*/
#ifndef _WAV_H_INCLUDED_
#define _WAV_H_INCLUDED_
#include "audioreader.h"
#include <string>
// This just somewhat encapsulates the code in the original
// WavSender.cpp The file is still read and converted in memory at
// once, and held in a memory array
class WavReader : public AudioReader {
public:
WavReader(const std::string& fn)
: m_fn(fn), m_fp(0), m_data(0), m_subChunk2Size(0), m_dataoffs(0),
m_index(0), m_tmpbuf(0), m_tmpbufsize(0) {
}
~WavReader() {
if (m_fp)
fclose(m_fp);
if (m_data)
free(m_data);
if (m_tmpbuf)
free(m_tmpbuf);
}
bool open();
// Get pointer to data at offset. Caller is supposed to know how
// much there is ahead.
const unsigned char *data(size_t size, ssize_t &nread);
unsigned int subChunk2Size() {
return m_subChunk2Size;
}
unsigned int sampleCount() {
return m_subChunk2Size / bytesPerSample();
}
unsigned int totalBytes() {
return m_subChunk2Size;
}
private:
bool readHeader();
bool readData();
std::string m_fn;
FILE *m_fp;
unsigned char *m_data;
unsigned int m_byteRate;
unsigned int m_subChunk2Size; // Data segment size in bytes
off_t m_dataoffs; // Data offset in file
off_t m_index; // Current position of reader
unsigned char *m_tmpbuf;
size_t m_tmpbufsize;
};
#endif /* _WAV_H_INCLUDED_ */