330 lines
17 KiB
C
330 lines
17 KiB
C
/* gameplaySP
|
|
*
|
|
* Copyright (C) 2006 Exophase <exophase@gmail.com>
|
|
*
|
|
* 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., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA
|
|
*/
|
|
|
|
#ifndef SOUND_H
|
|
#define SOUND_H
|
|
|
|
#define BUFFER_SIZE 65536
|
|
|
|
#define GBA_XTAL 16777216.0f
|
|
#define GBA_60HZ_RATE 16853760.0f /* 228*(272+960)*60 */
|
|
|
|
#if !defined(PSP_BUILD) && !defined(POLLUX_BUILD)
|
|
// run GBA at 60Hz (~0.5% faster) to better match host display
|
|
#define GBC_BASE_RATE GBA_60HZ_RATE
|
|
#else
|
|
#define GBC_BASE_RATE GBA_XTAL
|
|
#endif
|
|
|
|
typedef enum
|
|
{
|
|
DIRECT_SOUND_INACTIVE,
|
|
DIRECT_SOUND_RIGHT,
|
|
DIRECT_SOUND_LEFT,
|
|
DIRECT_SOUND_LEFTRIGHT
|
|
} direct_sound_status_type;
|
|
|
|
typedef enum
|
|
{
|
|
DIRECT_SOUND_VOLUME_50,
|
|
DIRECT_SOUND_VOLUME_100
|
|
} direct_sound_volume_type;
|
|
|
|
typedef struct
|
|
{
|
|
s8 fifo[32];
|
|
u32 fifo_base;
|
|
u32 fifo_top;
|
|
fixed8_24 fifo_fractional;
|
|
// The + 1 is to give some extra room for linear interpolation
|
|
// when wrapping around.
|
|
u32 buffer_index;
|
|
direct_sound_status_type status;
|
|
direct_sound_volume_type volume;
|
|
u32 last_cpu_ticks;
|
|
} direct_sound_struct;
|
|
|
|
typedef enum
|
|
{
|
|
GBC_SOUND_INACTIVE,
|
|
GBC_SOUND_RIGHT,
|
|
GBC_SOUND_LEFT,
|
|
GBC_SOUND_LEFTRIGHT
|
|
} gbc_sound_status_type;
|
|
|
|
|
|
typedef struct
|
|
{
|
|
u32 rate;
|
|
fixed16_16 frequency_step;
|
|
fixed16_16 sample_index;
|
|
fixed16_16 tick_counter;
|
|
u32 total_volume;
|
|
u32 envelope_initial_volume;
|
|
u32 envelope_volume;
|
|
u32 envelope_direction;
|
|
u32 envelope_status;
|
|
u32 envelope_step;
|
|
u32 envelope_ticks;
|
|
u32 envelope_initial_ticks;
|
|
u32 sweep_status;
|
|
u32 sweep_direction;
|
|
u32 sweep_ticks;
|
|
u32 sweep_initial_ticks;
|
|
u32 sweep_shift;
|
|
u32 length_status;
|
|
u32 length_ticks;
|
|
u32 noise_type;
|
|
u32 wave_type;
|
|
u32 wave_bank;
|
|
u32 wave_volume;
|
|
gbc_sound_status_type status;
|
|
u32 active_flag;
|
|
u32 master_enable;
|
|
s8 *sample_data;
|
|
} gbc_sound_struct;
|
|
|
|
extern direct_sound_struct direct_sound_channel[2];
|
|
extern gbc_sound_struct gbc_sound_channel[4];
|
|
extern s8 square_pattern_duty[4][8];
|
|
extern u32 gbc_sound_master_volume_left;
|
|
extern u32 gbc_sound_master_volume_right;
|
|
extern u32 gbc_sound_master_volume;
|
|
extern u32 gbc_sound_buffer_index;
|
|
extern u32 gbc_sound_last_cpu_ticks;
|
|
|
|
extern u32 sound_frequency;
|
|
extern u32 sound_on;
|
|
|
|
extern u32 global_enable_audio;
|
|
extern u32 enable_low_pass_filter;
|
|
extern u32 audio_buffer_size_number;
|
|
|
|
extern SDL_mutex *sound_mutex;
|
|
|
|
void sound_timer_queue8(u32 channel, u8 value);
|
|
void sound_timer_queue16(u32 channel, u16 value);
|
|
void sound_timer_queue32(u32 channel, u32 value);
|
|
void sound_timer(fixed8_24 frequency_step, u32 channel);
|
|
void sound_reset_fifo(u32 channel);
|
|
void update_gbc_sound(u32 cpu_ticks);
|
|
void init_sound(int need_reset);
|
|
void sound_write_mem_savestate(file_tag_type savestate_file);
|
|
void sound_read_savestate(file_tag_type savestate_file);
|
|
|
|
#ifdef IN_MEMORY_C
|
|
|
|
#define gbc_sound_tone_control_low(channel, address) \
|
|
{ \
|
|
u32 initial_volume = (value >> 12) & 0x0F; \
|
|
u32 envelope_ticks = ((value >> 8) & 0x07) * 4; \
|
|
gbc_sound_channel[channel].length_ticks = 64 - (value & 0x3F); \
|
|
gbc_sound_channel[channel].sample_data = \
|
|
square_pattern_duty[(value >> 6) & 0x03]; \
|
|
gbc_sound_channel[channel].envelope_direction = (value >> 11) & 0x01; \
|
|
gbc_sound_channel[channel].envelope_initial_volume = initial_volume; \
|
|
gbc_sound_channel[channel].envelope_volume = initial_volume; \
|
|
gbc_sound_channel[channel].envelope_initial_ticks = envelope_ticks; \
|
|
gbc_sound_channel[channel].envelope_ticks = envelope_ticks; \
|
|
gbc_sound_channel[channel].envelope_status = (envelope_ticks != 0); \
|
|
gbc_sound_channel[channel].envelope_volume = initial_volume; \
|
|
gbc_sound_update = 1; \
|
|
address16(io_registers, address) = value; \
|
|
} \
|
|
|
|
#define gbc_sound_tone_control_high(channel, address) \
|
|
{ \
|
|
u32 rate = value & 0x7FF; \
|
|
gbc_sound_channel[channel].rate = rate; \
|
|
gbc_sound_channel[channel].frequency_step = \
|
|
float_to_fp16_16(((131072.0 / (2048 - rate)) * 8.0) / sound_frequency); \
|
|
gbc_sound_channel[channel].length_status = (value >> 14) & 0x01; \
|
|
if(value & 0x8000) \
|
|
{ \
|
|
gbc_sound_channel[channel].active_flag = 1; \
|
|
gbc_sound_channel[channel].sample_index -= float_to_fp16_16(1.0 / 12.0); \
|
|
gbc_sound_channel[channel].envelope_ticks = \
|
|
gbc_sound_channel[channel].envelope_initial_ticks; \
|
|
gbc_sound_channel[channel].envelope_volume = \
|
|
gbc_sound_channel[channel].envelope_initial_volume; \
|
|
} \
|
|
\
|
|
gbc_sound_update = 1; \
|
|
address16(io_registers, address) = value; \
|
|
} \
|
|
|
|
#define gbc_sound_tone_control_sweep() \
|
|
{ \
|
|
u32 sweep_ticks = ((value >> 4) & 0x07) * 2; \
|
|
gbc_sound_channel[0].sweep_shift = value & 0x07; \
|
|
gbc_sound_channel[0].sweep_direction = (value >> 3) & 0x01; \
|
|
gbc_sound_channel[0].sweep_status = (value != 8); \
|
|
gbc_sound_channel[0].sweep_ticks = sweep_ticks; \
|
|
gbc_sound_channel[0].sweep_initial_ticks = sweep_ticks; \
|
|
gbc_sound_update = 1; \
|
|
address16(io_registers, 0x60) = value; \
|
|
} \
|
|
|
|
#define gbc_sound_wave_control() \
|
|
{ \
|
|
gbc_sound_channel[2].wave_type = (value >> 5) & 0x01; \
|
|
gbc_sound_channel[2].wave_bank = (value >> 6) & 0x01; \
|
|
if(value & 0x80) \
|
|
{ \
|
|
gbc_sound_channel[2].master_enable = 1; \
|
|
} \
|
|
else \
|
|
{ \
|
|
gbc_sound_channel[2].master_enable = 0; \
|
|
} \
|
|
\
|
|
gbc_sound_update = 1; \
|
|
address16(io_registers, 0x70) = value; \
|
|
} \
|
|
|
|
static u32 gbc_sound_wave_volume[4] = { 0, 16384, 8192, 4096 };
|
|
|
|
#define gbc_sound_tone_control_low_wave() \
|
|
{ \
|
|
gbc_sound_channel[2].length_ticks = 256 - (value & 0xFF); \
|
|
if((value >> 15) & 0x01) \
|
|
{ \
|
|
gbc_sound_channel[2].wave_volume = 12288; \
|
|
} \
|
|
else \
|
|
{ \
|
|
gbc_sound_channel[2].wave_volume = \
|
|
gbc_sound_wave_volume[(value >> 13) & 0x03]; \
|
|
} \
|
|
gbc_sound_update = 1; \
|
|
address16(io_registers, 0x72) = value; \
|
|
} \
|
|
|
|
#define gbc_sound_tone_control_high_wave() \
|
|
{ \
|
|
u32 rate = value & 0x7FF; \
|
|
gbc_sound_channel[2].rate = rate; \
|
|
gbc_sound_channel[2].frequency_step = \
|
|
float_to_fp16_16((2097152.0 / (2048 - rate)) / sound_frequency); \
|
|
gbc_sound_channel[2].length_status = (value >> 14) & 0x01; \
|
|
if(value & 0x8000) \
|
|
{ \
|
|
gbc_sound_channel[2].sample_index = 0; \
|
|
gbc_sound_channel[2].active_flag = 1; \
|
|
} \
|
|
gbc_sound_update = 1; \
|
|
address16(io_registers, 0x74) = value; \
|
|
} \
|
|
|
|
#define gbc_sound_noise_control() \
|
|
{ \
|
|
u32 dividing_ratio = value & 0x07; \
|
|
u32 frequency_shift = (value >> 4) & 0x0F; \
|
|
if(dividing_ratio == 0) \
|
|
{ \
|
|
gbc_sound_channel[3].frequency_step = \
|
|
float_to_fp16_16(1048576.0 / (1 << (frequency_shift + 1)) / \
|
|
sound_frequency); \
|
|
} \
|
|
else \
|
|
{ \
|
|
gbc_sound_channel[3].frequency_step = \
|
|
float_to_fp16_16(524288.0 / (dividing_ratio * \
|
|
(1 << (frequency_shift + 1))) / sound_frequency); \
|
|
} \
|
|
gbc_sound_channel[3].noise_type = (value >> 3) & 0x01; \
|
|
gbc_sound_channel[3].length_status = (value >> 14) & 0x01; \
|
|
if(value & 0x8000) \
|
|
{ \
|
|
gbc_sound_channel[3].sample_index = 0; \
|
|
gbc_sound_channel[3].active_flag = 1; \
|
|
gbc_sound_channel[3].envelope_ticks = \
|
|
gbc_sound_channel[3].envelope_initial_ticks; \
|
|
gbc_sound_channel[3].envelope_volume = \
|
|
gbc_sound_channel[3].envelope_initial_volume; \
|
|
} \
|
|
gbc_sound_update = 1; \
|
|
address16(io_registers, 0x7C) = value; \
|
|
} \
|
|
|
|
#define gbc_trigger_sound_channel(channel) \
|
|
gbc_sound_master_volume_right = value & 0x07; \
|
|
gbc_sound_master_volume_left = (value >> 4) & 0x07; \
|
|
gbc_sound_channel[channel].status = ((value >> (channel + 8)) & 0x01) | \
|
|
((value >> (channel + 11)) & 0x03) \
|
|
|
|
#define gbc_trigger_sound() \
|
|
{ \
|
|
gbc_trigger_sound_channel(0); \
|
|
gbc_trigger_sound_channel(1); \
|
|
gbc_trigger_sound_channel(2); \
|
|
gbc_trigger_sound_channel(3); \
|
|
address16(io_registers, 0x80) = value; \
|
|
} \
|
|
|
|
#define trigger_sound() \
|
|
{ \
|
|
timer[0].direct_sound_channels = (((value >> 10) & 0x01) == 0) | \
|
|
((((value >> 14) & 0x01) == 0) << 1); \
|
|
timer[1].direct_sound_channels = (((value >> 10) & 0x01) == 1) | \
|
|
((((value >> 14) & 0x01) == 1) << 1); \
|
|
direct_sound_channel[0].volume = (value >> 2) & 0x01; \
|
|
direct_sound_channel[0].status = (value >> 8) & 0x03; \
|
|
direct_sound_channel[1].volume = (value >> 3) & 0x01; \
|
|
direct_sound_channel[1].status = (value >> 12) & 0x03; \
|
|
gbc_sound_master_volume = value & 0x03; \
|
|
\
|
|
if((value >> 11) & 0x01) \
|
|
sound_reset_fifo(0); \
|
|
if((value >> 15) & 0x01) \
|
|
sound_reset_fifo(1); \
|
|
address16(io_registers, 0x82) = value; \
|
|
} \
|
|
|
|
#define sound_on() \
|
|
if(value & 0x80) \
|
|
{ \
|
|
if(sound_on != 1) \
|
|
{ \
|
|
sound_on = 1; \
|
|
} \
|
|
} \
|
|
else \
|
|
{ \
|
|
u32 i; \
|
|
for(i = 0; i < 4; i++) \
|
|
{ \
|
|
gbc_sound_channel[i].active_flag = 0; \
|
|
} \
|
|
sound_on = 0; \
|
|
} \
|
|
address16(io_registers, 0x84) = \
|
|
(address16(io_registers, 0x84) & 0x000F) | (value & 0xFFF0); \
|
|
|
|
#define sound_update_frequency_step(timer_number) \
|
|
timer[timer_number].frequency_step = \
|
|
float_to_fp8_24(GBC_BASE_RATE / (timer_reload * sound_frequency)) \
|
|
|
|
#endif // IN_MEMORY_C
|
|
|
|
void reset_sound();
|
|
void sound_exit();
|
|
|
|
#endif
|