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// Multi-channel sound buffer interface, and basic mono and stereo buffers
// Blip_Buffer 0.4.1
#ifndef MULTI_BUFFER_H
#define MULTI_BUFFER_H
#include "blargg_common.h"
#include "blip_buffer.h"
// Get indexed channel, from 0 to channel count - 1
struct channel_t {
struct Blip_Buffer* center;
struct Blip_Buffer* left;
struct Blip_Buffer* right;
};
enum { type_index_mask = 0xFF };
enum { wave_type = 0x100, noise_type = 0x200, mixed_type = wave_type | noise_type };
enum { buf_count = 3 };
struct Stereo_Buffer {
struct Blip_Buffer bufs [buf_count];
struct channel_t chan;
int stereo_added;
int was_stereo;
unsigned channels_changed_count_;
long sample_rate_;
int length_;
int samples_per_frame_;
};
// Initializes Stereo_Buffer structure
void Buffer_init( struct Stereo_Buffer* this );
blargg_err_t Buffer_set_sample_rate( struct Stereo_Buffer* this, long, int msec );
void Buffer_clock_rate( struct Stereo_Buffer* this, long );
void Buffer_bass_freq( struct Stereo_Buffer* this, int );
void Buffer_clear( struct Stereo_Buffer* this );
struct channel_t Buffer_channel( struct Stereo_Buffer* this );
void Buffer_end_frame( struct Stereo_Buffer* this, blip_time_t );
long Buffer_read_samples( struct Stereo_Buffer* this, blip_sample_t*, long );
// Count of changes to channel configuration. Incremented whenever
// a change is made to any of the Blip_Buffers for any channel.
unsigned Buffer_channels_changed_count( struct Stereo_Buffer* this );
void Buffer_channels_changed( struct Stereo_Buffer* this );
void Buffer_mix_stereo_no_center( struct Stereo_Buffer* this, blip_sample_t*, blargg_long );
void Buffer_mix_stereo( struct Stereo_Buffer* this, blip_sample_t*, blargg_long );
void Buffer_mix_mono( struct Stereo_Buffer* this, blip_sample_t*, blargg_long );
// Number of samples per output frame (1 = mono, 2 = stereo)
static inline int Buffer_samples_per_frame( struct Stereo_Buffer* this )
{
return this->samples_per_frame_;
}
// See Blip_Buffer.h
static inline long Buffer_sample_rate( struct Stereo_Buffer* this )
{
return this->sample_rate_;
}
// Length of buffer, in milliseconds
static inline int Buffer_length( struct Stereo_Buffer* this )
{
return this->length_;
}
#endif
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