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/*
* Snes9x - Portable Super Nintendo Entertainment System (TM) emulator.
*
* (c) Copyright 1996, 1997, 1998, 1999 Gary Henderson (gary@daniver.demon.co.uk) and
* Jerremy Koot (jkoot@snes9x.com)
*
* Super FX C emulator code
* (c) Copyright 1997, 1998, 1999 Ivar (Ivar@snes9x.com) and
* Gary Henderson.
* Super FX assembler emulator code (c) Copyright 1998 zsKnight and _Demo_.
*
* DSP1 emulator code (c) Copyright 1998 Ivar, _Demo_ and Gary Henderson.
* DOS port code contains the works of other authors. See headers in
* individual files.
*
* Snes9x homepage: www.snes9x.com
*
* Permission to use, copy, modify and distribute Snes9x in both binary and
* source form, for non-commercial purposes, is hereby granted without fee,
* providing that this license information and copyright notice appear with
* all copies and any derived work.
*
* This software is provided 'as-is', without any express or implied
* warranty. In no event shall the authors be held liable for any damages
* arising from the use of this software.
*
* Snes9x is freeware for PERSONAL USE only. Commercial users should
* seek permission of the copyright holders first. Commercial use includes
* charging money for Snes9x or software derived from Snes9x.
*
* The copyright holders request that bug fixes and improvements to the code
* should be forwarded to them so everyone can benefit from the modifications
* in future versions.
*
* Super NES and Super Nintendo Entertainment System are trademarks of
* Nintendo Co., Limited and its subsidiary companies.
*/
#ifndef _SOUND_H_
#define _SOUND_H_
enum { SOUND_SAMPLE = 0, SOUND_NOISE };
enum { SOUND_SILENT, SOUND_ATTACK, SOUND_DECAY, SOUND_SUSTAIN,
SOUND_RELEASE, SOUND_GAIN, SOUND_INCREASE_LINEAR,
SOUND_INCREASE_BENT_LINE, SOUND_DECREASE_LINEAR,
SOUND_DECREASE_EXPONENTIAL};
enum { MODE_NONE = SOUND_SILENT, MODE_ADSR, MODE_RELEASE = SOUND_RELEASE,
MODE_GAIN, MODE_INCREASE_LINEAR, MODE_INCREASE_BENT_LINE,
MODE_DECREASE_LINEAR, MODE_DECREASE_EXPONENTIAL};
#define MAX_ENVELOPE_HEIGHT 127
#define ENVELOPE_SHIFT 7
#define MAX_VOLUME 127
#define VOLUME_SHIFT 7
#define VOL_DIV 128
#define SOUND_DECODE_LENGTH 16
#define NUM_CHANNELS 8
#define SOUND_BUFFER_SIZE (1024 * 16)
#define MAX_BUFFER_SIZE SOUND_BUFFER_SIZE
#define SOUND_BUFFER_SIZE_MASK (SOUND_BUFFER_SIZE - 1)
#define SOUND_BUFS 4
#ifdef __sgi
# include <audio.h>
#endif /* __sgi */
typedef struct {
int sound_fd;
int sound_switch;
int playback_rate;
int buffer_size;
int noise_gen;
bool8 mute_sound;
int stereo;
bool8 sixteen_bit;
bool8 encoded;
#ifdef __sun
int last_eof;
#endif
#ifdef __sgi
ALport al_port;
#endif /* __sgi */
uint32 samples_mixed_so_far;
uint32 play_position;
uint32 err_counter;
uint32 err_rate;
} SoundStatus;
EXTERN_C volatile SoundStatus so;
typedef struct {
int state;
int type;
short volume_left;
short volume_right;
int hertz;
int frequency;
int count;
bool8 loop;
int envx;
short left_vol_level;
short right_vol_level;
short envx_target;
unsigned long int env_error;
unsigned long erate;
int direction;
unsigned long attack_rate;
unsigned long decay_rate;
unsigned long sustain_rate;
unsigned long release_rate;
unsigned long sustain_level;
signed short sample;
signed short decoded [16];
signed short previous [2];
signed short *block;
uint16 sample_number;
bool8 last_block;
bool8 needs_decode;
uint32 block_pointer;
uint32 sample_pointer;
int *echo_buf_ptr;
int mode;
int32 envxx;
signed short next_sample;
int32 interpolate;
// Just incase they are needed in the future, for snapshot compatibility.
uint32 dummy [8];
} Channel;
typedef struct
{
short master_volume_left;
short master_volume_right;
short echo_volume_left;
short echo_volume_right;
int echo_enable;
int echo_feedback;
int echo_ptr;
int echo_buffer_size;
int echo_write_enabled;
int echo_channel_enable;
int pitch_mod;
// Just incase they are needed in the future, for snapshot compatibility.
uint32 dummy [3];
Channel channels [NUM_CHANNELS];
bool8 no_filter;
int master_volume [2];
int echo_volume [2];
int noise_hertz;
} SSoundData;
EXTERN_C SSoundData SoundData;
void S9xSetSoundVolume (int channel, short volume_left, short volume_right);
void S9xSetSoundFrequency (int channel, int hertz);
void S9xSetSoundHertz (int channel, int hertz);
void S9xSetSoundType (int channel, int type_of_sound);
void S9xSetMasterVolume (short master_volume_left, short master_volume_right);
void S9xSetEchoVolume (short echo_volume_left, short echo_volume_right);
void S9xSetSoundControl (int sound_switch);
bool8 S9xSetSoundMute (bool8 mute);
void S9xSetEnvelopeHeight (int channel, int height);
void S9xSetSoundADSR (int channel, int attack, int decay, int sustain,
int sustain_level, int release);
void S9xSetSoundKeyOff (int channel);
void S9xSetSoundDecayMode (int channel);
void S9xSetSoundAttachMode (int channel);
void S9xSoundStartEnvelope (Channel *);
void S9xSetSoundSample (int channel, uint16 sample_number);
void S9xSetEchoFeedback (int echo_feedback);
void S9xSetEchoEnable (uint8 byte);
void S9xSetEchoDelay (int byte);
void S9xSetEchoWriteEnable (uint8 byte);
void S9xSetFilterCoefficient (int tap, int value);
void S9xSetFrequencyModulationEnable (uint8 byte);
void S9xSetEnvelopeRate (int channel, unsigned long rate, int direction,
int target);
bool8 S9xSetSoundMode (int channel, int mode);
int S9xGetEnvelopeHeight (int channel);
void S9xResetSound (bool8 full);
void S9xFixSoundAfterSnapshotLoad ();
void S9xPlaybackSoundSetting (int channel);
void S9xPlaySample (int channel);
void S9xFixEnvelope (int channel, uint8 gain, uint8 adsr1, uint8 adsr2);
void S9xStartSample (int channel);
EXTERN_C void S9xMixSamples (uint8 *buffer, int sample_count);
EXTERN_C void S9xMixSamplesO (uint8 *buffer, int sample_count, int byte_offset);
bool8 S9xOpenSoundDevice (int, bool8, int);
void S9xSetPlaybackRate (uint32 rate);
#endif
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