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Merge pull request #275 from desttinghim/invalid-params-fix 

Don't panic when setting hardware params in alsa
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mitchmindtree 2019-06-06 15:22:42 +02:00 committed by GitHub
parent b82ca1e348 e7c086d0af
commit ba4a29ae6c
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GPG Key ID: 4AEE18F83AFDEB23
1 changed files with 25 additions and 17 deletions
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42
src/alsa/mod.rs
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@ -789,13 +789,15 @@ unsafe fn set_hw_params_from_format(
pcm_handle: *mut alsa::snd_pcm_t, pcm_handle: *mut alsa::snd_pcm_t,
hw_params: &HwParams, hw_params: &HwParams,
format: &Format, format: &Format,
) { ) -> Result<(), String> {
check_errors(alsa::snd_pcm_hw_params_any(pcm_handle, hw_params.0)) if let Err(e) = check_errors(alsa::snd_pcm_hw_params_any(pcm_handle, hw_params.0)) {
.expect("Errors on pcm handle"); return Err("Errors on pcm handle".to_string());
check_errors(alsa::snd_pcm_hw_params_set_access(pcm_handle, }
if let Err(e) = check_errors(alsa::snd_pcm_hw_params_set_access(pcm_handle,
hw_params.0, hw_params.0,
alsa::SND_PCM_ACCESS_RW_INTERLEAVED)) alsa::SND_PCM_ACCESS_RW_INTERLEAVED)) {
.expect("handle not acessible"); return Err("Handle not acessible".to_string());
}
let data_type = if cfg!(target_endian = "big") { let data_type = if cfg!(target_endian = "big") {
match format.data_type { match format.data_type {
@ -811,20 +813,23 @@ unsafe fn set_hw_params_from_format(
} }
}; };
check_errors(alsa::snd_pcm_hw_params_set_format(pcm_handle, if let Err(e) = check_errors(alsa::snd_pcm_hw_params_set_format(pcm_handle,
hw_params.0, hw_params.0,
data_type)) data_type)) {
.expect("format could not be set"); return Err("Format could not be set".to_string());
check_errors(alsa::snd_pcm_hw_params_set_rate(pcm_handle, }
if let Err(e) = check_errors(alsa::snd_pcm_hw_params_set_rate(pcm_handle,
hw_params.0, hw_params.0,
format.sample_rate.0 as libc::c_uint, format.sample_rate.0 as libc::c_uint,
0)) 0)) {
.expect("sample rate could not be set"); return Err("Sample rate could not be set".to_string());
check_errors(alsa::snd_pcm_hw_params_set_channels(pcm_handle, }
if let Err(e) = check_errors(alsa::snd_pcm_hw_params_set_channels(pcm_handle,
hw_params.0, hw_params.0,
format.channels as format.channels as
libc::c_uint)) libc::c_uint)) {
.expect("channel count could not be set"); return Err("Channel count could not be set".to_string());
}
let mut max_buffer_size = format.sample_rate.0 as alsa::snd_pcm_uframes_t / let mut max_buffer_size = format.sample_rate.0 as alsa::snd_pcm_uframes_t /
format.channels as alsa::snd_pcm_uframes_t / format.channels as alsa::snd_pcm_uframes_t /
5; // 200ms of buffer 5; // 200ms of buffer
@ -832,8 +837,11 @@ unsafe fn set_hw_params_from_format(
hw_params.0, hw_params.0,
&mut max_buffer_size)) &mut max_buffer_size))
.unwrap(); .unwrap();
check_errors(alsa::snd_pcm_hw_params(pcm_handle, hw_params.0)) if let Err(e) = check_errors(alsa::snd_pcm_hw_params(pcm_handle, hw_params.0)) {
.expect("hardware params could not be set"); return Err("Hardware params could not be set.".to_string());
}
Ok(())
} }
unsafe fn set_sw_params_from_format( unsafe fn set_sw_params_from_format(