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gstreamer-audio/audio_info: Change functions from returning Option to Result

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Partial work for:
https://gitlab.freedesktop.org/gstreamer/gstreamer-rs/issues/216
This commit is contained in:
Tony Jinwoo Ahn 2019-12-14 14:10:06 +00:00 committed by Sebastian Dröge
parent 90854eb047
commit c563fb6f44
2 changed files with 18 additions and 11 deletions
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3
examples/src/bin/subclass.rs
View file

@ -180,7 +180,8 @@ mod fir_filter {
_element: &gst_base::BaseTransform,
caps: &gst::Caps,
) -> Option<usize> {
gst_audio::AudioInfo::from_caps(caps).map(|info| info.bpf() as usize)
let audio_info = gst_audio::AudioInfo::from_caps(caps).ok();
audio_info.map(|info| info.bpf() as usize)
}
// Called when shutting down the element so we can release all stream-related state

26
gstreamer-audio/src/audio_info.rs
View file

@ -49,13 +49,13 @@ pub struct AudioInfoBuilder<'a> {
}
impl<'a> AudioInfoBuilder<'a> {
pub fn build(self) -> Option<AudioInfo> {
pub fn build(self) -> Result<AudioInfo, glib::error::BoolError> {
unsafe {
let mut info = mem::MaybeUninit::uninit();
let positions = if let Some(p) = self.positions {
if p.len() != self.channels as usize || p.len() > 64 {
return None;
return Err(glib_bool_error!("Invalid positions length"));
}
let positions: [gst_audio_sys::GstAudioChannelPosition; 64] =
@ -74,7 +74,7 @@ impl<'a> AudioInfoBuilder<'a> {
true.to_glib(),
));
if !valid {
return None;
return Err(glib_bool_error!("channel positions are invalid"));
}
Some(positions)
@ -98,7 +98,7 @@ impl<'a> AudioInfoBuilder<'a> {
let mut info = info.assume_init();
if info.finfo.is_null() || info.rate <= 0 || info.channels <= 0 {
return None;
return Err(glib_bool_error!("Failed to build AudioInfo"));
}
if let Some(flags) = self.flags {
@ -110,7 +110,7 @@ impl<'a> AudioInfoBuilder<'a> {
}
let positions = array_init::array_init(|i| from_glib(info.position[i]));
Some(AudioInfo(info, positions))
Ok(AudioInfo(info, positions))
}
}
@ -151,7 +151,7 @@ impl AudioInfo {
}
}
pub fn from_caps(caps: &gst::CapsRef) -> Option<Self> {
pub fn from_caps(caps: &gst::CapsRef) -> Result<AudioInfo, glib::error::BoolError> {
skip_assert_initialized!();
unsafe {
@ -162,15 +162,21 @@ impl AudioInfo {
)) {
let info = info.assume_init();
let positions = array_init::array_init(|i| from_glib(info.position[i]));
Some(AudioInfo(info, positions))
Ok(AudioInfo(info, positions))
} else {
None
Err(glib_bool_error!("Failed to create AudioInfo from caps"))
}
}
}
pub fn to_caps(&self) -> Option<gst::Caps> {
unsafe { from_glib_full(gst_audio_sys::gst_audio_info_to_caps(&self.0)) }
pub fn to_caps(&self) -> Result<gst::Caps, glib::error::BoolError> {
unsafe {
let result = from_glib_full(gst_audio_sys::gst_audio_info_to_caps(&self.0));
match result {
Some(c) => Ok(c),
None => Err(glib_bool_error!("Failed to create caps from AudioInfo")),
}
}
}
pub fn convert<V: Into<gst::GenericFormattedValue>, U: gst::SpecificFormattedValue>(