diff options
Diffstat (limited to 'src')
| -rw-r--r-- | src/apu.rs | 41 | ||||
| -rw-r--r-- | src/bin.rs | 46 |
2 files changed, 37 insertions, 50 deletions
@@ -150,13 +150,12 @@ pub struct Pulse { impl Pulse { fn tick_env(&mut self) { - /* should be clocked by frame counter */ if !self.env_start { if self.env_lvl == 0 { self.env_lvl = self.env_period; if self.decay_lvl == 0 { if self.env_loop { - self.decay_lvl = 15; + self.decay_lvl = 0xf; } } else { self.decay_lvl -= 1; @@ -165,7 +164,7 @@ impl Pulse { self.env_lvl -= 1; } } else { - self.decay_lvl = 15; + self.decay_lvl = 0xf; self.env_start = false; self.env_lvl = self.env_period; } @@ -176,7 +175,7 @@ impl Pulse { if self.swp_lvl == 0 { reload = true; if self.swp_en { - let mut p = self.timer_period; + let mut p: u16 = self.timer_period; let mut delta = p >> self.swp_count; if self.swp_neg { delta = !delta; @@ -254,18 +253,19 @@ impl Pulse { self.set_const(data & 0x10 == 0x10); self.set_env_period(data & 0xf); self.set_env_vol(data & 0xf); - self.env_start = true; } pub fn write_reg2(&mut self, data: u8) { self.set_sweep(data) } pub fn write_reg3(&mut self, data: u8) { - self.timer_period = (self.timer_period & 0xff00) | data as u16 + let p = (self.timer_period & 0xff00) | data as u16; + self.set_timer_period(p); } pub fn write_reg4(&mut self, data: u8) { self.set_len(data >> 3); - self.timer_period = (self.timer_period & 0x00ff) | ((data as u16 & 7) << 8); + let p = (self.timer_period & 0x00ff) | ((data as u16 & 7) << 8); + self.set_timer_period(p); self.seq_cnt = 0; self.env_start = true; } @@ -358,7 +358,6 @@ impl Triangle { fn set_cnt_lvl(&mut self, d: u8) { self.cnt_lvl = d } fn set_ctrl(&mut self, b: bool) { self.ctrl = b } fn set_cnt_rld_val(&mut self, d: u8) { self.cnt_rld_val = d } - fn set_timer_peroid(&mut self, p: u16) { self.timer_period = p } fn set_len(&mut self, d: u8) { if self.enabled { self.len_lvl = LEN_TABLE[d as usize] @@ -371,22 +370,17 @@ impl Triangle { } pub fn write_reg3(&mut self, data: u8) { - self.timer_period = (self.timer_period & 0xff00) | data as u16 + self.timer_period = (self.timer_period & 0xff00) | data as u16; } pub fn write_reg4(&mut self, data: u8) { self.set_len(data >> 3); self.timer_period = (self.timer_period & 0x00ff) | ((data as u16 & 7) << 8); - self.seq_cnt = 0; self.timer_lvl = self.timer_period; self.cnt_rld = true; } - fn output(&self) -> u8 { - let len = self.len_lvl > 0; - let lin = self.cnt_lvl > 0; - if len && lin { TRI_SEQ_TABLE[self.seq_cnt as usize] } else { 0 } - } + fn output(&self) -> u8 { TRI_SEQ_TABLE[self.seq_cnt as usize] } } pub struct APU<'a> { @@ -466,6 +460,9 @@ impl<'a> APU<'a> { pub fn write_frame_counter(&mut self, data: u8) { self.frame_inh = data & 0x40 == 1; self.frame_mode = data >> 7 == 1; + if self.frame_mode { + self.tick_len_swp() + } } fn tick_timer(&mut self) { @@ -480,9 +477,10 @@ impl<'a> APU<'a> { let f = self.frame_lvl; match self.frame_mode { false => { + self.frame_lvl = if f == 3 { 0 } else { f + 1 }; match f { - 0 | 2 => self.tick_env(), - 1 => { + 1 | 3 => self.tick_env(), + 2 => { self.tick_env(); self.tick_len_swp(); }, @@ -494,18 +492,17 @@ impl<'a> APU<'a> { } }, }; - self.frame_lvl = if f == 3 { 0 } else { f + 1 } }, true => { + self.frame_lvl = if f == 4 { 0 } else { f + 1 }; match f { - 0 | 2 => self.tick_env(), - 1 | 4 => { + 1 | 3 => self.tick_env(), + 0 | 2 => { self.tick_env(); self.tick_len_swp(); }, - _ => () + _ => self.tick_env() } - self.frame_lvl = if f == 4 { 0 } else { f + 1 } } } self.frame_int @@ -32,7 +32,7 @@ use memory::{CPUMemory, PPUMemory, VMem}; use cartridge::{BankType, MirrorType, Cartridge}; use controller::stdctl; -const PIXEL_SIZE: u32 = 2; +const PIXEL_SIZE: u32 = 3; const RGB_COLORS: [u32; 64] = [ 0x666666, 0x002a88, 0x1412a7, 0x3b00a4, 0x5c007e, 0x6e0040, 0x6c0600, 0x561d00, 0x333500, 0x0b4800, 0x005200, 0x004f08, 0x00404d, 0x000000, 0x000000, 0x000000, @@ -227,10 +227,8 @@ impl<'a> ppu::Screen for SDLWindow<'a> { } } -struct SDLAudio { - device: sdl2::audio::AudioQueue<i16>, - buffer: [i16; 1], - buffer_cnt: usize +struct SDLAudio<'a> { + device: &'a sdl2::audio::AudioQueue<i16>, } /* @@ -255,39 +253,22 @@ fn gen_wave(bytes_to_write: i32) -> Vec<i16> { } */ -impl SDLAudio { - fn new(sdl_context: &sdl2::Sdl) -> Self { - let audio_subsystem = sdl_context.audio().unwrap(); - let desired_spec = AudioSpecDesired { - freq: Some(apu::AUDIO_SAMPLE_FREQ as i32), - channels: Some(1), - samples: Some(4096) - }; - let device = audio_subsystem.open_queue::<i16, _>(None, &desired_spec).unwrap(); +impl<'a> SDLAudio<'a> { + fn new(device: &'a sdl2::audio::AudioQueue<i16>) -> Self { let t = SDLAudio { - device, buffer: [0; 1], buffer_cnt: 0 + device }; t.device.resume(); t } - - fn flush(&mut self) { - self.device.queue(&self.buffer[..self.buffer_cnt]); - self.buffer_cnt = 0; - } } -impl apu::Speaker for SDLAudio { +impl<'a> apu::Speaker for SDLAudio<'a> { fn queue(&mut self, sample: u16) { - self.buffer[self.buffer_cnt] = sample.wrapping_sub(32768) as i16; - self.buffer_cnt += 1; - if self.buffer_cnt == self.buffer.len() { - self.flush() - } + self.device.queue(&[sample.wrapping_sub(32768) as i16]); } fn push(&mut self) { - self.flush(); } } @@ -360,11 +341,20 @@ fn main() { } } */ + let sdl_context = sdl2::init().unwrap(); + let audio_subsystem = sdl_context.audio().unwrap(); + let desired_spec = AudioSpecDesired { + freq: Some(apu::AUDIO_SAMPLE_FREQ as i32), + channels: Some(1), + samples: Some(4096) + }; + let device = audio_subsystem.open_queue::<i16, _>(None, &desired_spec).unwrap(); + let p1ctl = stdctl::Joystick::new(); let cart = SimpleCart::new(chr_rom, prg_rom, sram, mirror); let mut win = SDLWindow::new(&sdl_context, &p1ctl); - let mut spkr = SDLAudio::new(&sdl_context); + let mut spkr = SDLAudio::new(&device); let mut m: Box<mapper::Mapper> = match mapper_id { 0 | 2 => Box::new(mapper::Mapper2::new(cart)), 1 => Box::new(mapper::Mapper1::new(cart)), |