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Improve accuracy of the panning and volume until the last second

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This commit is contained in:
Gwilym Inzani 2023-07-23 22:15:30 +01:00
parent d233a2539c
commit a4df095031
3 changed files with 10 additions and 7 deletions
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8
agb/src/sound/mixer/mod.rs
View file

@ -229,9 +229,9 @@ pub struct SoundChannel {
restart_point: Num<u32, 8>,
playback_speed: Num<u32, 8>,
volume: Num<i16, 4>, // between 0 and 1
volume: Num<i16, 8>, // between 0 and 1
panning: Num<i16, 4>, // between -1 and 1
panning: Num<i16, 8>, // between -1 and 1
is_done: bool,
is_stereo: bool,
@ -366,7 +366,7 @@ impl SoundChannel {
/// Defaults to 0 (meaning equal on left and right) and doesn't affect stereo
/// sounds.
#[inline(always)]
pub fn panning(&mut self, panning: impl Into<Num<i16, 4>>) -> &mut Self {
pub fn panning(&mut self, panning: impl Into<Num<i16, 8>>) -> &mut Self {
let panning = panning.into();
debug_assert!(panning >= Num::new(-1), "panning value must be >= -1");
@ -381,7 +381,7 @@ impl SoundChannel {
///
/// Must be a value >= 0 and defaults to 1.
#[inline(always)]
pub fn volume(&mut self, volume: impl Into<Num<i16, 4>>) -> &mut Self {
pub fn volume(&mut self, volume: impl Into<Num<i16, 8>>) -> &mut Self {
let volume = volume.into();
assert!(volume >= Num::new(0), "volume must be >= 0");

7
agb/src/sound/mixer/sw_mixer.rs
View file

@ -449,14 +449,14 @@ impl MixerBuffer {
agb_rs__mixer_add_stereo_first(
channel.data.as_ptr().add(channel.pos.floor() as usize),
working_buffer.as_mut_ptr(),
channel.volume,
channel.volume.change_base(),
self.frequency.buffer_size(),
);
} else {
agb_rs__mixer_add_stereo(
channel.data.as_ptr().add(channel.pos.floor() as usize),
working_buffer.as_mut_ptr(),
channel.volume,
channel.volume.change_base(),
self.frequency.buffer_size(),
);
}
@ -475,6 +475,9 @@ impl MixerBuffer {
let right_amount = ((channel.panning + 1) / 2) * channel.volume;
let left_amount = ((-channel.panning + 1) / 2) * channel.volume;
let right_amount: Num<i16, 4> = right_amount.change_base();
let left_amount: Num<i16, 4> = left_amount.change_base();
let channel_len = Num::<u32, 8>::new(channel.data.len() as u32);
let mut playback_speed = channel.playback_speed;

2
tracker/agb-tracker/src/lib.rs
View file

@ -256,7 +256,7 @@ impl TrackerChannel {
};
}
PatternEffect::Panning(panning) => {
channel.panning(*panning);
channel.panning(panning.change_base());
}
PatternEffect::Volume(volume) => {
channel.volume(volume.change_base());