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Merge pull request #75 from tomaka/alsa-format 

Use the correct format in ALSA
This commit is contained in:
tomaka 2015-09-22 15:23:28 +02:00
parent 8ddbbf2c1e 46151e09cc
commit 0a13991f86
1 changed files with 13 additions and 5 deletions
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18
src/alsa/mod.rs
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@ -35,6 +35,7 @@ impl Endpoint {
let hw_params = HwParams::alloc();
check_errors(alsa::snd_pcm_hw_params_any(playback_handle, hw_params.0)).unwrap();
// TODO: check endianess
const FORMATS: [(SampleFormat, alsa::snd_pcm_format_t); 3] = [
//SND_PCM_FORMAT_S8,
//SND_PCM_FORMAT_U8,
@ -193,7 +194,7 @@ impl Drop for HwParams {
}
impl Voice {
pub fn new(endpoint: &Endpoint, _format: &Format) -> Result<Voice, CreationError> {
pub fn new(endpoint: &Endpoint, format: &Format) -> Result<Voice, CreationError> {
unsafe {
let name = ffi::CString::new(endpoint.0.clone()).unwrap();
@ -202,12 +203,19 @@ impl Voice {
alsa::SND_PCM_STREAM_PLAYBACK,
alsa::SND_PCM_NONBLOCK)).unwrap();
// TODO: check endianess
let data_type = match format.data_type {
SampleFormat::I16 => alsa::SND_PCM_FORMAT_S16_LE,
SampleFormat::U16 => alsa::SND_PCM_FORMAT_U16_LE,
SampleFormat::F32 => alsa::SND_PCM_FORMAT_FLOAT_LE,
};
let hw_params = HwParams::alloc();
check_errors(alsa::snd_pcm_hw_params_any(playback_handle, hw_params.0)).unwrap();
check_errors(alsa::snd_pcm_hw_params_set_access(playback_handle, hw_params.0, alsa::SND_PCM_ACCESS_RW_INTERLEAVED)).unwrap();
check_errors(alsa::snd_pcm_hw_params_set_format(playback_handle, hw_params.0, alsa::SND_PCM_FORMAT_S16_LE)).unwrap(); // TODO: check endianess
check_errors(alsa::snd_pcm_hw_params_set_rate(playback_handle, hw_params.0, 44100, 0)).unwrap();
check_errors(alsa::snd_pcm_hw_params_set_channels(playback_handle, hw_params.0, 2)).unwrap();
check_errors(alsa::snd_pcm_hw_params_set_format(playback_handle, hw_params.0, data_type)).unwrap();
check_errors(alsa::snd_pcm_hw_params_set_rate(playback_handle, hw_params.0, format.samples_rate.0 as libc::c_uint, 0)).unwrap();
check_errors(alsa::snd_pcm_hw_params_set_channels(playback_handle, hw_params.0, format.channels.len() as libc::c_uint)).unwrap();
check_errors(alsa::snd_pcm_hw_params(playback_handle, hw_params.0)).unwrap();
@ -215,7 +223,7 @@ impl Voice {
Ok(Voice {
channel: Mutex::new(playback_handle),
num_channels: 2,
num_channels: format.channels.len() as u16,
})
}
}