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Add codecs to librbcodec.

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Change-Id: Id7f4717d51ed02d67cb9f9cb3c0ada4a81843f97
Reviewed-on: http://gerrit.rockbox.org/137
Reviewed-by: Nils Wallménius <nils@rockbox.org>
Tested-by: Nils Wallménius <nils@rockbox.org>
This commit is contained in:
Sean Bartell 2011-06-25 21:32:25 -04:00 • committed by Nils Wallménius
parent a0009907de
commit f40bfc9267
757 changed files with 122 additions and 122 deletions
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63
lib/rbcodec/codecs/libgme/sms_apu.h Normal file
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// Sega Master System SN76489 PSG sound chip emulator
// Sms_Snd_Emu 0.1.2
#ifndef SMS_APU_H
#define SMS_APU_H
#include "blargg_common.h"
#include "blip_buffer.h"
// 0: Square 1, 1: Square 2, 2: Square 3, 3: Noise
enum { sms_osc_count = 4 }; // 0 <= chan < osc_count
struct Osc
{
struct Blip_Buffer* outputs [4]; // NULL, right, left, center
struct Blip_Buffer* output;
int last_amp;
int volume;
int period;
int delay;
unsigned phase;
};
struct Sms_Apu {
struct Osc oscs [sms_osc_count];
int ggstereo;
int latch;
blip_time_t last_time;
int min_tone_period;
unsigned noise_feedback;
unsigned looped_feedback;
struct Blip_Synth synth;
};
// Basics
void Sms_apu_init( struct Sms_Apu* this );
// Sets buffer(s) to generate sound into, or 0 to mute. If only center is not 0,
// output is mono.
void Sms_apu_set_output( struct Sms_Apu* this, int i, struct Blip_Buffer* center, struct Blip_Buffer* left, struct Blip_Buffer* right);
// Emulates to time t, then writes data to Game Gear left/right assignment byte
void Sms_apu_write_ggstereo( struct Sms_Apu* this, blip_time_t t, int data );
// Emulates to time t, then writes data
void Sms_apu_write_data( struct Sms_Apu* this, blip_time_t t, int data );
// Emulates to time t, then subtracts t from the current time.
// OK if previous write call had time slightly after t.
void Sms_apu_end_frame( struct Sms_Apu* this, blip_time_t t );
// More features
// Resets sound chip and sets noise feedback bits and width
void Sms_apu_reset( struct Sms_Apu* this, unsigned noise_feedback, int noise_width );
// Sets overall volume, where 1.0 is normal
void Sms_apu_volume( struct Sms_Apu* this, int vol );
#endif