Really basic playing

This commit is contained in:
Gwilym Inzani 2023-07-12 17:36:41 +01:00
parent a77b536e69
commit 308cb3a19c
5 changed files with 224 additions and 31 deletions

View file

@ -7,16 +7,21 @@ pub struct Track<'a> {
pub samples: &'a [Sample<'a>], pub samples: &'a [Sample<'a>],
pub pattern_data: &'a [PatternSlot], pub pattern_data: &'a [PatternSlot],
pub patterns: &'a [Pattern], pub patterns: &'a [Pattern],
pub frames_per_step: u16,
} }
#[derive(Debug)] #[derive(Debug)]
pub struct Sample<'a> { pub struct Sample<'a> {
pub data: &'a [u8], pub data: &'a [u8],
pub should_loop: bool,
} }
#[derive(Debug)] #[derive(Debug)]
pub struct Pattern { pub struct Pattern {
pub num_channels: usize, pub num_channels: usize,
pub length: usize,
pub start_position: usize,
} }
#[derive(Debug)] #[derive(Debug)]
@ -32,9 +37,12 @@ impl<'a> quote::ToTokens for Track<'a> {
fn to_tokens(&self, tokens: &mut proc_macro2::TokenStream) { fn to_tokens(&self, tokens: &mut proc_macro2::TokenStream) {
use quote::{quote, TokenStreamExt}; use quote::{quote, TokenStreamExt};
let samples = self.samples; let Track {
let pattern_data = self.pattern_data; samples,
let patterns = self.patterns; pattern_data,
patterns,
frames_per_step,
} = self;
tokens.append_all(quote! { tokens.append_all(quote! {
{ {
@ -48,25 +56,43 @@ impl<'a> quote::ToTokens for Track<'a> {
samples: SAMPLES, samples: SAMPLES,
pattern_data: PATTERN_DATA, pattern_data: PATTERN_DATA,
patterns: PATTERNS, patterns: PATTERNS,
frames_per_step: #frames_per_step,
} }
} }
}) })
} }
} }
#[cfg(feature = "quote")]
struct ByteString<'a>(&'a [u8]);
#[cfg(feature = "quote")]
impl quote::ToTokens for ByteString<'_> {
fn to_tokens(&self, tokens: &mut proc_macro2::TokenStream) {
use quote::TokenStreamExt;
tokens.append(proc_macro2::Literal::byte_string(self.0));
}
}
#[cfg(feature = "quote")] #[cfg(feature = "quote")]
impl<'a> quote::ToTokens for Sample<'a> { impl<'a> quote::ToTokens for Sample<'a> {
fn to_tokens(&self, tokens: &mut proc_macro2::TokenStream) { fn to_tokens(&self, tokens: &mut proc_macro2::TokenStream) {
use quote::{quote, TokenStreamExt}; use quote::{quote, TokenStreamExt};
let self_as_u8s = self.data.iter().map(|i| *i as u8); let self_as_u8s: Vec<_> = self.data.iter().map(|i| *i as u8).collect();
let samples = ByteString(&self_as_u8s);
let should_loop = self.should_loop;
tokens.append_all(quote! { tokens.append_all(quote! {
{ {
use agb_tracker_interop::*; use agb_tracker_interop::*;
const SAMPLE_DATA: &[u8] = &[#(#self_as_u8s),*]; #[repr(align(4))]
agb_tracker_interop::Sample { data: SAMPLE_DATA } struct AlignmentWrapper<const N: usize>([u8; N]);
const SAMPLE_DATA: &[u8] = &AlignmentWrapper(*#samples).0;
agb_tracker_interop::Sample { data: SAMPLE_DATA, should_loop: #should_loop }
} }
}); });
} }
@ -109,7 +135,11 @@ impl quote::ToTokens for Pattern {
fn to_tokens(&self, tokens: &mut proc_macro2::TokenStream) { fn to_tokens(&self, tokens: &mut proc_macro2::TokenStream) {
use quote::{quote, TokenStreamExt}; use quote::{quote, TokenStreamExt};
let num_channels = self.num_channels; let Pattern {
num_channels,
length,
start_position,
} = self;
tokens.append_all(quote! { tokens.append_all(quote! {
{ {
@ -117,6 +147,8 @@ impl quote::ToTokens for Pattern {
Pattern { Pattern {
num_channels: #num_channels, num_channels: #num_channels,
length: #length,
start_position: #start_position,
} }
} }
}) })

View file

@ -3,7 +3,7 @@
use agb::sound::mixer::Frequency; use agb::sound::mixer::Frequency;
use agb::Gba; use agb::Gba;
use agb_tracker::{import_xm, Track}; use agb_tracker::{import_xm, Track, Tracker};
const AJOJ: Track = import_xm!("examples/ajoj.xm"); const AJOJ: Track = import_xm!("examples/ajoj.xm");
@ -14,7 +14,10 @@ fn main(mut gba: Gba) -> ! {
let mut mixer = gba.mixer.mixer(Frequency::Hz18157); let mut mixer = gba.mixer.mixer(Frequency::Hz18157);
mixer.enable(); mixer.enable();
let mut tracker = Tracker::new(&AJOJ);
loop { loop {
tracker.step(&mut mixer);
mixer.frame(); mixer.frame();
vblank_provider.wait_for_vblank(); vblank_provider.wait_for_vblank();
} }

View file

@ -5,6 +5,12 @@
#![cfg_attr(test, reexport_test_harness_main = "test_main")] #![cfg_attr(test, reexport_test_harness_main = "test_main")]
#![cfg_attr(test, test_runner(agb::test_runner::test_runner))] #![cfg_attr(test, test_runner(agb::test_runner::test_runner))]
extern crate alloc;
use alloc::{vec, vec::Vec};
use agb::sound::mixer::{ChannelId, Mixer, SoundChannel};
#[cfg(feature = "xm")] #[cfg(feature = "xm")]
pub use agb_xm::import_xm; pub use agb_xm::import_xm;
@ -12,11 +18,86 @@ pub use agb_tracker_interop as __private;
pub use __private::Track; pub use __private::Track;
#[cfg(test)] pub struct Tracker {
mod tests { track: &'static Track<'static>,
#[test_case] channels: Vec<Option<ChannelId>>,
fn it_works(_gba: &mut agb::Gba) {
assert_eq!(1, 1); step: u16,
current_row: usize,
current_pattern: usize,
}
impl Tracker {
pub fn new(track: &'static Track<'static>) -> Self {
agb::println!("{}", track.frames_per_step);
Self {
track,
channels: vec![],
step: 0,
current_row: 0,
current_pattern: 0,
}
}
pub fn step(&mut self, mixer: &mut Mixer) {
if self.step != 0 {
self.increment_step();
return; // TODO: volume / pitch slides
}
let current_pattern = &self.track.patterns[self.current_pattern];
let channels_to_play = current_pattern.num_channels;
self.channels.resize_with(channels_to_play, || None);
let pattern_data_pos = current_pattern.start_position + self.current_row * channels_to_play;
let pattern_slots =
&self.track.pattern_data[pattern_data_pos..pattern_data_pos + channels_to_play];
for (channel_id, pattern_slot) in self.channels.iter_mut().zip(pattern_slots) {
if pattern_slot.sample == 0 {
// do nothing
} else {
if let Some(channel) = channel_id
.take()
.and_then(|channel_id| mixer.channel(&channel_id))
{
channel.stop();
}
let sample = &self.track.samples[pattern_slot.sample - 1];
let mut new_channel = SoundChannel::new(sample.data);
new_channel
.panning(pattern_slot.panning)
.volume(pattern_slot.volume)
.playback(pattern_slot.speed);
if sample.should_loop {
new_channel.should_loop();
}
*channel_id = mixer.play_sound(new_channel);
}
}
self.increment_step();
}
fn increment_step(&mut self) {
self.step += 1;
if self.step == self.track.frames_per_step * 2 {
self.current_row += 1;
if self.current_row > self.track.patterns[self.current_pattern].length {
self.current_pattern += 1;
self.current_row = 0;
}
self.step = 0;
}
} }
} }

View file

@ -48,26 +48,50 @@ pub fn parse_module(module: &Module) -> TokenStream {
let instruments = &module.instrument; let instruments = &module.instrument;
let mut instruments_map = HashMap::new(); let mut instruments_map = HashMap::new();
struct SampleData {
data: Vec<u8>,
should_loop: bool,
fine_tune: f64,
relative_note: i8,
}
let mut samples = vec![]; let mut samples = vec![];
for (instrument_index, instrument) in instruments.iter().enumerate() { for (instrument_index, instrument) in instruments.iter().enumerate() {
let InstrumentType::Default(ref instrument) = instrument.instr_type else { continue; }; let InstrumentType::Default(ref instrument) = instrument.instr_type else { continue; };
for (sample_index, sample) in instrument.sample.iter().enumerate() { for (sample_index, sample) in instrument.sample.iter().enumerate() {
let sample = match &sample.data { let should_loop = !matches!(sample.flags, LoopType::No);
SampleDataType::Depth8(depth8) => depth8 let fine_tune = sample.finetune as f64;
.iter() let relative_note = sample.relative_note;
.map(|value| *value as u8)
.collect::<Vec<_>>() let mut sample = match &sample.data {
.clone(), SampleDataType::Depth8(depth8) => {
depth8.iter().map(|value| *value as u8).collect::<Vec<_>>()
}
SampleDataType::Depth16(depth16) => depth16 SampleDataType::Depth16(depth16) => depth16
.iter() .iter()
.map(|sample| (sample >> 8) as i8 as u8) .map(|sample| (sample >> 8) as i8 as u8)
.collect::<Vec<_>>(), .collect::<Vec<_>>(),
}; };
if should_loop {
sample.append(&mut sample.clone());
sample.append(&mut sample.clone());
sample.append(&mut sample.clone());
sample.append(&mut sample.clone());
sample.append(&mut sample.clone());
sample.append(&mut sample.clone());
sample.append(&mut sample.clone());
}
instruments_map.insert((instrument_index, sample_index), samples.len()); instruments_map.insert((instrument_index, sample_index), samples.len());
samples.push(sample); samples.push(SampleData {
data: sample,
should_loop,
fine_tune,
relative_note,
});
} }
} }
@ -76,6 +100,7 @@ pub fn parse_module(module: &Module) -> TokenStream {
for pattern in &module.pattern { for pattern in &module.pattern {
let mut num_channels = 0; let mut num_channels = 0;
let start_pos = pattern_data.len();
for row in pattern.iter() { for row in pattern.iter() {
for slot in row { for slot in row {
@ -90,7 +115,7 @@ pub fn parse_module(module: &Module) -> TokenStream {
let sample_slot = instrument.sample_for_note[slot.note as usize] as usize; let sample_slot = instrument.sample_for_note[slot.note as usize] as usize;
instruments_map instruments_map
.get(&(instrument_index, sample_slot)) .get(&(instrument_index, sample_slot))
.cloned() .map(|sample_idx| sample_idx + 1)
.unwrap_or(0) .unwrap_or(0)
} else { } else {
0 0
@ -104,7 +129,23 @@ pub fn parse_module(module: &Module) -> TokenStream {
slot.volume as i16 slot.volume as i16
} / 64, } / 64,
); );
let speed = Num::new(1); // TODO: Calculate speed for the correct note here
if sample == 0 {
// TODO should take into account previous sample played on this channel
pattern_data.push(agb_tracker_interop::PatternSlot {
volume: Num::new(0),
speed: Num::new(0),
panning: Num::new(0),
sample: 0,
})
} else {
let sample_played = &samples[sample - 1];
let speed = note_to_speed(
slot.note,
sample_played.fine_tune,
sample_played.relative_note,
);
let panning = Num::new(0); let panning = Num::new(0);
pattern_data.push(agb_tracker_interop::PatternSlot { pattern_data.push(agb_tracker_interop::PatternSlot {
@ -114,23 +155,51 @@ pub fn parse_module(module: &Module) -> TokenStream {
sample, sample,
}); });
} }
}
num_channels = row.len(); num_channels = row.len();
} }
patterns.push(agb_tracker_interop::Pattern { num_channels }); patterns.push(agb_tracker_interop::Pattern {
num_channels,
length: pattern.len(),
start_position: start_pos,
});
} }
let samples: Vec<_> = samples let samples: Vec<_> = samples
.iter() .iter()
.map(|sample| agb_tracker_interop::Sample { data: &sample }) .map(|sample| agb_tracker_interop::Sample {
data: &sample.data,
should_loop: sample.should_loop,
})
.collect(); .collect();
let frames_per_step =
((60.0 * 60.0) / module.default_bpm as f64 / module.default_tempo as f64) as u16;
let interop = agb_tracker_interop::Track { let interop = agb_tracker_interop::Track {
samples: &samples, samples: &samples,
pattern_data: &pattern_data, pattern_data: &pattern_data,
patterns: &patterns, patterns: &patterns,
frames_per_step,
}; };
quote!(#interop) quote!(#interop)
} }
fn note_to_frequency(note: Note, fine_tune: f64, relative_note: i8) -> f64 {
let real_note = (note as usize as f64) + (relative_note as f64);
let period = 10.0 * 12.0 * 16.0 * 4.0 - (real_note as f64) * 16.0 * 4.0 - fine_tune / 2.0;
8363.0 * 2.0f64.powf((6.0 * 12.0 * 16.0 * 4.0 - period) / (12.0 * 16.0 * 4.0))
}
fn note_to_speed(note: Note, fine_tune: f64, relative_note: i8) -> Num<u32, 8> {
let frequency = note_to_frequency(note, fine_tune, relative_note);
let gba_audio_frequency = 18157f64;
let speed: f64 = frequency / gba_audio_frequency;
Num::from_raw((speed * (1 << 8) as f64) as u32)
}

View file

@ -0,0 +1,8 @@
fn main() -> Result<(), Box<dyn std::error::Error>> {
let module = agb_xm_core::load_module_from_file(&std::path::Path::new(
"../agb-tracker/examples/ajoj.xm",
))?;
let output = agb_xm_core::parse_module(&module);
Ok(())
}