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Avoid duplicating the feature flag definition

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This commit is contained in:
Gwilym Kuiper 2022-06-11 13:09:20 +01:00
parent 73d6dc448f
commit 42d3455abf
1 changed files with 22 additions and 16 deletions
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38
agb/src/sound/mixer/sw_mixer.rs
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@ -41,7 +41,7 @@ impl Mixer {
} }
pub fn enable(&mut self) { pub fn enable(&mut self) {
hw::set_timer_counter_for_frequency_and_enable(&mut self.timer, SOUND_FREQUENCY); hw::set_timer_counter_for_frequency_and_enable(&mut self.timer, constants::SOUND_FREQUENCY);
hw::set_sound_control_register_for_mixer(); hw::set_sound_control_register_for_mixer();
} }
@ -99,14 +99,16 @@ impl Mixer {
// I've picked one frequency that works nicely. But there are others that work nicely // I've picked one frequency that works nicely. But there are others that work nicely
// which we may want to consider in the future: http://deku.gbadev.org/program/sound1.html // which we may want to consider in the future: http://deku.gbadev.org/program/sound1.html
#[cfg(not(feature = "freq18157"))] #[cfg(not(feature = "freq18157"))]
const SOUND_FREQUENCY: i32 = 10512; mod constants {
#[cfg(not(feature = "freq18157"))] pub const SOUND_FREQUENCY: i32 = 10512;
const SOUND_BUFFER_SIZE: usize = 176; pub const SOUND_BUFFER_SIZE: usize = 176;
}
#[cfg(feature = "freq18157")] #[cfg(feature = "freq18157")]
const SOUND_FREQUENCY: i32 = 18157; mod constants {
#[cfg(feature = "freq18157")] pub const SOUND_FREQUENCY: i32 = 18157;
const SOUND_BUFFER_SIZE: usize = 304; pub const SOUND_BUFFER_SIZE: usize = 304;
}
fn set_asm_buffer_size() { fn set_asm_buffer_size() {
extern "C" { extern "C" {
@ -114,12 +116,12 @@ fn set_asm_buffer_size() {
} }
unsafe { unsafe {
agb_rs__buffer_size = SOUND_BUFFER_SIZE; agb_rs__buffer_size = constants::SOUND_BUFFER_SIZE;
} }
} }
#[repr(C, align(4))] #[repr(C, align(4))]
struct SoundBuffer([i8; SOUND_BUFFER_SIZE * 2]); struct SoundBuffer([i8; constants::SOUND_BUFFER_SIZE * 2]);
struct MixerBuffer { struct MixerBuffer {
buffer1: SoundBuffer, // alternating bytes left and right channels buffer1: SoundBuffer, // alternating bytes left and right channels
@ -133,15 +135,16 @@ impl MixerBuffer {
set_asm_buffer_size(); set_asm_buffer_size();
MixerBuffer { MixerBuffer {
buffer1: SoundBuffer([0; SOUND_BUFFER_SIZE * 2]), buffer1: SoundBuffer([0; constants::SOUND_BUFFER_SIZE * 2]),
buffer2: SoundBuffer([0; SOUND_BUFFER_SIZE * 2]), buffer2: SoundBuffer([0; constants::SOUND_BUFFER_SIZE * 2]),
buffer_1_active: true, buffer_1_active: true,
} }
} }
fn swap(&mut self) { fn swap(&mut self) {
let (left_buffer, right_buffer) = self.write_buffer().split_at(SOUND_BUFFER_SIZE); let (left_buffer, right_buffer) =
self.write_buffer().split_at(constants::SOUND_BUFFER_SIZE);
hw::enable_dma_for_sound(left_buffer, LeftOrRight::Left); hw::enable_dma_for_sound(left_buffer, LeftOrRight::Left);
hw::enable_dma_for_sound(right_buffer, LeftOrRight::Right); hw::enable_dma_for_sound(right_buffer, LeftOrRight::Right);
@ -154,7 +157,8 @@ impl MixerBuffer {
} }
fn write_channels<'a>(&mut self, channels: impl Iterator<Item = &'a mut SoundChannel>) { fn write_channels<'a>(&mut self, channels: impl Iterator<Item = &'a mut SoundChannel>) {
let mut buffer: [Num<i16, 4>; SOUND_BUFFER_SIZE * 2] = [Num::new(0); SOUND_BUFFER_SIZE * 2]; let mut buffer: [Num<i16, 4>; constants::SOUND_BUFFER_SIZE * 2] =
[Num::new(0); constants::SOUND_BUFFER_SIZE * 2];
for channel in channels { for channel in channels {
if channel.is_done { if channel.is_done {
@ -170,7 +174,9 @@ impl MixerBuffer {
let right_amount = ((channel.panning + 1) / 2) * channel.volume; let right_amount = ((channel.panning + 1) / 2) * channel.volume;
let left_amount = ((-channel.panning + 1) / 2) * channel.volume; let left_amount = ((-channel.panning + 1) / 2) * channel.volume;
if (channel.pos + playback_speed * SOUND_BUFFER_SIZE).floor() >= channel.data.len() { if (channel.pos + playback_speed * constants::SOUND_BUFFER_SIZE).floor()
>= channel.data.len()
{
// TODO: This should probably play what's left rather than skip the last bit // TODO: This should probably play what's left rather than skip the last bit
if channel.should_loop { if channel.should_loop {
channel.pos = 0.into(); channel.pos = 0.into();
@ -199,7 +205,7 @@ impl MixerBuffer {
} }
} }
channel.pos += playback_speed * SOUND_BUFFER_SIZE; channel.pos += playback_speed * constants::SOUND_BUFFER_SIZE;
} }
let write_buffer = self.write_buffer(); let write_buffer = self.write_buffer();
@ -208,7 +214,7 @@ impl MixerBuffer {
} }
} }
fn write_buffer(&mut self) -> &mut [i8; SOUND_BUFFER_SIZE * 2] { fn write_buffer(&mut self) -> &mut [i8; constants::SOUND_BUFFER_SIZE * 2] {
if self.buffer_1_active { if self.buffer_1_active {
&mut self.buffer2.0 &mut self.buffer2.0
} else { } else {