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/* WAVE sound file writer for recording 16-bit output during program development */
#ifndef WAVE_WRITER_H
#define WAVE_WRITER_H
#ifdef __cplusplus
extern "C" {
#endif
/* C interface */
void wave_open( long sample_rate, const char* filename );
void wave_enable_stereo( void );
void wave_write( const short* buf, long count );
long wave_sample_count( void );
void wave_close( void );
#ifdef __cplusplus
}
#endif
#ifdef __cplusplus
#include <stddef.h>
#include <stdio.h>
/* C++ interface */
class Wave_Writer {
public:
typedef short sample_t;
// Create sound file with given sample rate (in Hz) and filename.
// Exits program if there's an error.
Wave_Writer( long sample_rate, char const* filename = "out.wav" );
// Enable stereo output
void enable_stereo();
// Append 'count' samples to file. Use every 'skip'th source sample; allows
// one channel of stereo sample pairs to be written by specifying a skip of 2.
void write( const sample_t*, long count, int skip = 1 );
// Append 'count' floating-point samples to file. Use every 'skip'th source sample;
// allows one channel of stereo sample pairs to be written by specifying a skip of 2.
void write( const float*, long count, int skip = 1 );
// Number of samples written so far
long sample_count() const;
// Finish writing sound file and close it
void close();
~Wave_Writer();
public:
// Deprecated
void stereo( bool b ) { chan_count = b ? 2 : 1; }
private:
enum { buf_size = 32768 * 2 };
unsigned char* buf;
FILE* file;
long sample_count_;
long rate;
long buf_pos;
int chan_count;
void flush();
};
inline void Wave_Writer::enable_stereo() { chan_count = 2; }
inline long Wave_Writer::sample_count() const { return sample_count_; }
#endif
#endif
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