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audio/claxon: remove some panic points

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This remove some possible panic points due to unwrapping and
underflowing integer maths.

Signed-off-by: Luca BRUNO <lucab@lucabruno.net>
This commit is contained in:
Luca BRUNO 2020-04-11 09:30:35 +00:00
parent 281aad2243
commit 02935b7005
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GPG key ID: A9834A2252078E4E
1 changed files with 23 additions and 25 deletions
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48
audio/claxon/src/claxondec.rs
View file

@ -226,21 +226,15 @@ impl ClaxonDec {
state: &mut State,
indata: &[u8],
) -> Result<gst::FlowSuccess, gst::FlowError> {
let streaminfo = match get_claxon_streaminfo(indata) {
Ok(v) => v,
Err(error) => {
gst_element_error!(element, gst::StreamError::Decode, [error]);
return Err(gst::FlowError::Error);
}
};
let streaminfo = get_claxon_streaminfo(indata).map_err(|e| {
gst_element_error!(element, gst::StreamError::Decode, [e]);
gst::FlowError::Error
})?;
let audio_info = match get_gstaudioinfo(streaminfo) {
Ok(v) => v,
Err(error) => {
gst_element_error!(element, gst::StreamError::Decode, [error]);
return Err(gst::FlowError::Error);
}
};
let audio_info = get_gstaudioinfo(streaminfo).map_err(|e| {
gst_element_error!(element, gst::StreamError::Decode, [&e]);
gst::FlowError::Error
})?;
gst_debug!(
self.cat,
@ -355,26 +349,30 @@ fn get_claxon_streaminfo(indata: &[u8]) -> Result<claxon::metadata::StreamInfo,
fn get_gstaudioinfo(
streaminfo: claxon::metadata::StreamInfo,
) -> Result<gst_audio::AudioInfo, &'static str> {
) -> Result<gst_audio::AudioInfo, String> {
let format = match streaminfo.bits_per_sample {
8 => gst_audio::AudioFormat::S8,
16 => gst_audio::AUDIO_FORMAT_S16,
24 => gst_audio::AUDIO_FORMAT_S2432,
32 => gst_audio::AUDIO_FORMAT_S32,
_ => return Err("format not supported"),
_ => return Err("format not supported".to_string()),
};
if streaminfo.channels > 8 {
return Err("more than 8 channels not supported yet");
}
let mut audio_info =
gst_audio::AudioInfo::new(format, streaminfo.sample_rate, streaminfo.channels);
let index = streaminfo.channels as usize;
let index = match streaminfo.channels as usize {
0 => return Err("no channels".to_string()),
n if n > 8 => return Err("more than 8 channels, not supported yet".to_string()),
n => n,
};
let to = &FLAC_CHANNEL_POSITIONS[index - 1][..index];
audio_info = audio_info.positions(to);
let info_builder =
gst_audio::AudioInfo::new(format, streaminfo.sample_rate, streaminfo.channels)
.positions(to);
Ok(audio_info.build().unwrap())
let audio_info = info_builder
.build()
.map_err(|e| format!("failed to build audio info: {}", e))?;
Ok(audio_info)
}
// http://www.xiph.org/vorbis/doc/Vorbis_I_spec.html#x1-800004.3.9