329 lines
17 KiB
C
329 lines
17 KiB
C
/* gameplaySP
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*
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* Copyright (C) 2006 Exophase <exophase@gmail.com>
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*
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* This program is free software; you can redistribute it and/or
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* modify it under the terms of the GNU General Public License as
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* published by the Free Software Foundation; either version 2 of
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* the License, or (at your option) any later version.
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*
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* This program is distributed in the hope that it will be useful,
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* but WITHOUT ANY WARRANTY; without even the implied warranty of
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
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* General Public License for more details.
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*
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* You should have received a copy of the GNU General Public License
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* along with this program; if not, write to the Free Software
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* Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA
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*/
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#ifndef SOUND_H
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#define SOUND_H
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#define BUFFER_SIZE 65536
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// A lot of sound cards on PC can't handle such small buffers but this
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// seems to work well on PSP.
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#ifdef PSP_BUILD
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#define SOUND_BUFFER_SIZE 4096
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#else
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#define SOUND_BUFFER_SIZE 16384
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#endif
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typedef enum
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{
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DIRECT_SOUND_INACTIVE,
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DIRECT_SOUND_RIGHT,
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DIRECT_SOUND_LEFT,
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DIRECT_SOUND_LEFTRIGHT
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} direct_sound_status_type;
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typedef enum
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{
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DIRECT_SOUND_VOLUME_50,
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DIRECT_SOUND_VOLUME_100
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} direct_sound_volume_type;
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typedef struct
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{
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s8 fifo[32];
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u32 fifo_base;
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u32 fifo_top;
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fixed16_16 fifo_fractional;
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// The + 1 is to give some extra room for linear interpolation
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// when wrapping around.
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u32 buffer_index;
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direct_sound_status_type status;
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direct_sound_volume_type volume;
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u32 last_cpu_ticks;
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} direct_sound_struct;
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typedef enum
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{
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GBC_SOUND_INACTIVE,
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GBC_SOUND_RIGHT,
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GBC_SOUND_LEFT,
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GBC_SOUND_LEFTRIGHT
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} gbc_sound_status_type;
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typedef struct
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{
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u32 rate;
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fixed16_16 frequency_step;
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fixed16_16 sample_index;
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fixed16_16 tick_counter;
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u32 total_volume;
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u32 envelope_initial_volume;
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u32 envelope_volume;
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u32 envelope_direction;
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u32 envelope_status;
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u32 envelope_step;
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u32 envelope_ticks;
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u32 envelope_initial_ticks;
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u32 sweep_status;
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u32 sweep_direction;
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u32 sweep_ticks;
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u32 sweep_initial_ticks;
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u32 sweep_shift;
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u32 length_status;
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u32 length_ticks;
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u32 noise_type;
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u32 wave_type;
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u32 wave_bank;
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u32 wave_volume;
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gbc_sound_status_type status;
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u32 active_flag;
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u32 master_enable;
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s8 *sample_data;
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} gbc_sound_struct;
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extern direct_sound_struct direct_sound_channel[2];
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extern gbc_sound_struct gbc_sound_channel[4];
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extern s8 square_pattern_duty[4][8];
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extern u32 gbc_sound_master_volume_left;
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extern u32 gbc_sound_master_volume_right;
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extern u32 gbc_sound_master_volume;
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extern u32 sound_frequency;
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extern u32 sound_on;
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extern u32 global_enable_audio;
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extern u32 enable_low_pass_filter;
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extern u32 audio_buffer_size_number;
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extern SDL_mutex *sound_mutex;
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extern SDL_cond *sound_cv;
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void sound_timer_queue8(u32 channel, u8 value);
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void sound_timer_queue16(u32 channel, u16 value);
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void sound_timer_queue32(u32 channel, u32 value);
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void sound_timer(fixed16_16 frequency_step, u32 channel);
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void sound_reset_fifo(u32 channel);
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void update_gbc_sound(u32 cpu_ticks);
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void init_sound();
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void sound_write_mem_savestate(file_tag_type savestate_file);
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void sound_read_savestate(file_tag_type savestate_file);
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#define gbc_sound_tone_control_low(channel, address) \
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{ \
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u32 initial_volume = (value >> 12) & 0x0F; \
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u32 envelope_ticks = ((value >> 8) & 0x07) * 4; \
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gbc_sound_channel[channel].length_ticks = 64 - (value & 0x3F); \
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gbc_sound_channel[channel].sample_data = \
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square_pattern_duty[(value >> 6) & 0x03]; \
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gbc_sound_channel[channel].envelope_direction = (value >> 11) & 0x01; \
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gbc_sound_channel[channel].envelope_initial_volume = initial_volume; \
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gbc_sound_channel[channel].envelope_volume = initial_volume; \
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gbc_sound_channel[channel].envelope_initial_ticks = envelope_ticks; \
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gbc_sound_channel[channel].envelope_ticks = envelope_ticks; \
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gbc_sound_channel[channel].envelope_status = (envelope_ticks != 0); \
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gbc_sound_channel[channel].envelope_volume = initial_volume; \
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gbc_sound_update = 1; \
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address16(io_registers, address) = value; \
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} \
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#define gbc_sound_tone_control_high(channel, address) \
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{ \
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u32 rate = value & 0x7FF; \
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gbc_sound_channel[channel].rate = rate; \
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gbc_sound_channel[channel].frequency_step = \
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float_to_fp16_16(((131072.0 / (2048 - rate)) * 8.0) / sound_frequency); \
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gbc_sound_channel[channel].length_status = (value >> 14) & 0x01; \
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if(value & 0x8000) \
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{ \
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gbc_sound_channel[channel].active_flag = 1; \
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gbc_sound_channel[channel].sample_index -= float_to_fp16_16(1.0 / 12.0); \
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gbc_sound_channel[channel].envelope_ticks = \
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gbc_sound_channel[channel].envelope_initial_ticks; \
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gbc_sound_channel[channel].envelope_volume = \
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gbc_sound_channel[channel].envelope_initial_volume; \
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} \
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\
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gbc_sound_update = 1; \
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address16(io_registers, address) = value; \
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} \
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#define gbc_sound_tone_control_sweep() \
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{ \
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u32 sweep_ticks = ((value >> 4) & 0x07) * 2; \
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gbc_sound_channel[0].sweep_shift = value & 0x07; \
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gbc_sound_channel[0].sweep_direction = (value >> 3) & 0x01; \
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gbc_sound_channel[0].sweep_status = (value != 8); \
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gbc_sound_channel[0].sweep_ticks = sweep_ticks; \
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gbc_sound_channel[0].sweep_initial_ticks = sweep_ticks; \
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gbc_sound_update = 1; \
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address16(io_registers, 0x60) = value; \
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} \
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#define gbc_sound_wave_control() \
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{ \
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gbc_sound_channel[2].wave_type = (value >> 5) & 0x01; \
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gbc_sound_channel[2].wave_bank = (value >> 6) & 0x01; \
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if(value & 0x80) \
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{ \
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gbc_sound_channel[2].master_enable = 1; \
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} \
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else \
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{ \
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gbc_sound_channel[2].master_enable = 0; \
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} \
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\
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gbc_sound_update = 1; \
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address16(io_registers, 0x70) = value; \
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} \
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static u32 gbc_sound_wave_volume[4] = { 0, 16384, 8192, 4096 };
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#define gbc_sound_tone_control_low_wave() \
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{ \
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gbc_sound_channel[2].length_ticks = 256 - (value & 0xFF); \
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if((value >> 15) & 0x01) \
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{ \
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gbc_sound_channel[2].wave_volume = 12288; \
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} \
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else \
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{ \
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gbc_sound_channel[2].wave_volume = \
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gbc_sound_wave_volume[(value >> 13) & 0x03]; \
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} \
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gbc_sound_update = 1; \
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address16(io_registers, 0x72) = value; \
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} \
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#define gbc_sound_tone_control_high_wave() \
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{ \
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u32 rate = value & 0x7FF; \
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gbc_sound_channel[2].rate = rate; \
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gbc_sound_channel[2].frequency_step = \
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float_to_fp16_16((2097152.0 / (2048 - rate)) / sound_frequency); \
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gbc_sound_channel[2].length_status = (value >> 14) & 0x01; \
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if(value & 0x8000) \
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{ \
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gbc_sound_channel[2].sample_index = 0; \
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gbc_sound_channel[2].active_flag = 1; \
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} \
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gbc_sound_update = 1; \
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address16(io_registers, 0x74) = value; \
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} \
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#define gbc_sound_noise_control() \
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{ \
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u32 dividing_ratio = value & 0x07; \
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u32 frequency_shift = (value >> 4) & 0x0F; \
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if(dividing_ratio == 0) \
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{ \
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gbc_sound_channel[3].frequency_step = \
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float_to_fp16_16(1048576.0 / (1 << (frequency_shift + 1)) / \
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sound_frequency); \
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} \
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else \
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{ \
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gbc_sound_channel[3].frequency_step = \
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float_to_fp16_16(524288.0 / (dividing_ratio * \
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(1 << (frequency_shift + 1))) / sound_frequency); \
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} \
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gbc_sound_channel[3].noise_type = (value >> 3) & 0x01; \
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gbc_sound_channel[3].length_status = (value >> 14) & 0x01; \
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if(value & 0x8000) \
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{ \
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gbc_sound_channel[3].sample_index = 0; \
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gbc_sound_channel[3].active_flag = 1; \
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gbc_sound_channel[3].envelope_ticks = \
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gbc_sound_channel[3].envelope_initial_ticks; \
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gbc_sound_channel[3].envelope_volume = \
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gbc_sound_channel[3].envelope_initial_volume; \
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} \
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gbc_sound_update = 1; \
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address16(io_registers, 0x7C) = value; \
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} \
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#define gbc_trigger_sound_channel(channel) \
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gbc_sound_master_volume_right = value & 0x07; \
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gbc_sound_master_volume_left = (value >> 4) & 0x07; \
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gbc_sound_channel[channel].status = ((value >> (channel + 8)) & 0x01) | \
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((value >> (channel + 11)) & 0x03) \
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#define gbc_trigger_sound() \
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{ \
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gbc_trigger_sound_channel(0); \
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gbc_trigger_sound_channel(1); \
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gbc_trigger_sound_channel(2); \
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gbc_trigger_sound_channel(3); \
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address16(io_registers, 0x80) = value; \
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} \
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#define trigger_sound() \
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{ \
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timer[0].direct_sound_channels = (((value >> 10) & 0x01) == 0) | \
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((((value >> 14) & 0x01) == 0) << 1); \
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timer[1].direct_sound_channels = (((value >> 10) & 0x01) == 1) | \
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((((value >> 14) & 0x01) == 1) << 1); \
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direct_sound_channel[0].volume = (value >> 2) & 0x01; \
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direct_sound_channel[0].status = (value >> 8) & 0x03; \
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direct_sound_channel[1].volume = (value >> 3) & 0x01; \
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direct_sound_channel[1].status = (value >> 12) & 0x03; \
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gbc_sound_master_volume = value & 0x03; \
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\
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if((value >> 11) & 0x01) \
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sound_reset_fifo(0); \
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if((value >> 15) & 0x01) \
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sound_reset_fifo(1); \
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address16(io_registers, 0x82) = value; \
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} \
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#define sound_on() \
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if(value & 0x80) \
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{ \
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if(sound_on != 1) \
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{ \
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sound_on = 1; \
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} \
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} \
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else \
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{ \
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u32 i; \
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for(i = 0; i < 4; i++) \
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{ \
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gbc_sound_channel[i].active_flag = 0; \
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} \
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sound_on = 0; \
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} \
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address16(io_registers, 0x84) = \
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(address16(io_registers, 0x84) & 0x000F) | (value & 0xFFF0); \
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#define sound_update_frequency_step(timer_number) \
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timer[timer_number].frequency_step = \
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float_to_fp16_16(16777216.0 / (timer_reload * sound_frequency)) \
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void reset_sound();
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void sound_exit();
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#endif
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