attemp at removing buffer
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DMSDeveloper
mitchmindtree
parent
9a084347db
commit
ab7e17558f
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@ -12,6 +12,7 @@ use UnknownTypeInputBuffer;
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use std::sync::{Arc, Mutex};
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use std::mem;
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use std::sync::atomic::{AtomicUsize, Ordering};
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use SampleFormat;
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pub struct EventLoop {
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asio_stream: Arc<Mutex<Option<sys::AsioStream>>>,
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@ -56,12 +57,53 @@ impl EventLoop {
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let bytes_per_channel = format.data_type.sample_size();
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let num_channels = format.channels.clone();
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// Create buffers
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let cpal_num_samples =
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(stream.buffer_size as usize) * num_channels as usize;
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let channel_len = cpal_num_samples
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/ num_channels as usize;
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enum CpalBuffer{
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I16(Vec<i16>),
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U16(Vec<u16>),
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F32(Vec<f32>),
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}
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enum ChannelBuffer{
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I16(Vec<Vec<i16>>),
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U16(Vec<Vec<u16>>),
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F32(Vec<Vec<f32>>),
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}
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let (mut cpal_buffer,
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mut channels) = match format.data_type{
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SampleFormat::I16 => {
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let mut cpal_buffer = CpalBuffer::I16(vec![0 as i16; cpal_num_samples]);
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let mut channels = ChannelBuffer::I16(
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(0..num_channels)
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.map(|_| Vec::with_capacity(channel_len))
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.collect());
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(cpal_buffer, channels)
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}
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SampleFormat::U16 => {
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let mut cpal_buffer = CpalBuffer::U16(vec![0 as u16; cpal_num_samples]);
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let mut channels = ChannelBuffer::U16(
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(0..num_channels)
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.map(|_| Vec::with_capacity(channel_len))
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.collect());
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(cpal_buffer, channels)
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}
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SampleFormat::F32 => {
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let mut cpal_buffer = CpalBuffer::F32(vec![0 as f32; cpal_num_samples]);
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let mut channels = ChannelBuffer::F32(
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(0..num_channels)
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.map(|_| Vec::with_capacity(channel_len))
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.collect());
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(cpal_buffer, channels)
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}
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};
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sys::set_callback(move |index| unsafe {
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if let Some(ref asio_stream) = *asio_stream.lock().unwrap() {
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// Number of samples needed total
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let cpal_num_samples =
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(asio_stream.buffer_size as usize) * num_channels as usize;
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let mut callbacks = callbacks.lock().unwrap();
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// Assuming only one callback, probably needs to change
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@ -73,22 +115,18 @@ impl EventLoop {
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$SampleTypeIdent:ident,
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$AsioType:ty,
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$AsioTypeIdent:ident) => {
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// Buffer that is filled by cpal.
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let mut cpal_buffer: Vec<$SampleType> = vec![0 as $SampleType; cpal_num_samples];
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// Function for deinterleaving because
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// cpal writes to buffer interleaved
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fn interleave(channels: Vec<Vec<$SampleType>>) -> Vec<$SampleType>{
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let mut buffer: Vec<$SampleType> = Vec::new();
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fn interleave(channels: &[Vec<$SampleType>],
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buffer: &mut Vec<$SampleType>) {
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let length = channels[0].len();
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for i in 0..length{
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for channel in &channels{
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for channel in channels{
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buffer.push(channel[i]);
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}
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}
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buffer
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}
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let mut channels: Vec<Vec<$SampleType>> = vec![Vec::new(); num_channels as usize];
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// For each channel write the cpal data to
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// the asio buffer
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// Also need to check for Endian
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@ -111,11 +149,11 @@ impl EventLoop {
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// interleave all the channels
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let mut inter_buffer = interleave(channels);
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interleave(&channels, &mut cpal_buffer);
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let buff = InputBuffer{
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buffer: &mut inter_buffer
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buffer: &mut cpal_buffer
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};
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callback(
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StreamId(count),
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@ -130,17 +168,25 @@ impl EventLoop {
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};
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// Generic over types
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// TODO check for endianess
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match stream_type {
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sys::AsioSampleType::ASIOSTInt32LSB => {
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match (stream_type, cpal_buffer, channels) {
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(sys::AsioSampleType::ASIOSTInt32LSB,
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CpalBuffer::I16(cpal_buffer),
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ChannelBuffer::I16(channels))=> {
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try_callback!(I16, i16, i16, i32, i32);
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}
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sys::AsioSampleType::ASIOSTInt16LSB => {
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(sys::AsioSampleType::ASIOSTInt16LSB,
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CpalBuffer::I16(cpal_buffer),
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ChannelBuffer::I16(channels))=> {
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try_callback!(I16, i16, i16, i16, i16);
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}
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sys::AsioSampleType::ASIOSTFloat32LSB => {
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(sys::AsioSampleType::ASIOSTFloat32LSB,
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CpalBuffer::F32(cpal_buffer),
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ChannelBuffer::F32(channels))=> {
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try_callback!(F32, f32, f32, f32, f32);
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}
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sys::AsioSampleType::ASIOSTFloat64LSB => {
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(sys::AsioSampleType::ASIOSTFloat64LSB,
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CpalBuffer::F32(cpal_buffer),
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ChannelBuffer::F32(channels))=> {
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try_callback!(F32, f32, f32, f64, f64);
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}
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_ => println!("unsupported format {:?}", stream_type),
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@ -215,20 +261,22 @@ pub fn build_output_stream(
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// Function for deinterleaving because
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// cpal writes to buffer interleaved
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fn deinterleave(data_slice: &mut [$SampleType],
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num_channels: usize) -> Vec<Vec<$SampleType>>{
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let channel_len = data_slice.len() / num_channels;
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let mut channels: Vec<_> = (0..num_channels)
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.map(|_| Vec::with_capacity(channel_len))
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.collect();
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num_channels: usize,
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channels: &mut [Vec<$SampleType>]) {
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for (i, &sample) in data_slice.iter().enumerate() {
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let ch = i % num_channels;
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channels[ch].push(sample);
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}
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channels
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}
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// Deinter all the channels
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let deinter_channels = deinterleave(&mut cpal_buffer[..],
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num_channels as usize);
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let channel_len = cpal_buffer.len()
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/ num_channels as usize;
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let mut deinter_channels: Vec<_> = (0..num_channels)
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.map(|_| Vec::with_capacity(channel_len))
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.collect();
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deinterleave(&mut cpal_buffer[..],
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num_channels as usize,
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&mut deinter_channels);
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// For each channel write the cpal data to
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// the asio buffer
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