forked from mirrors/gstreamer-rs
251 lines
8.1 KiB
Rust
251 lines
8.1 KiB
Rust
// Take a look at the license at the top of the repository in the LICENSE file.
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use std::fmt;
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#[cfg(any(feature = "v1_16", feature = "dox"))]
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#[cfg_attr(feature = "dox", doc(cfg(feature = "v1_16")))]
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use std::ptr;
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#[cfg(any(feature = "v1_16", feature = "dox"))]
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#[cfg_attr(feature = "dox", doc(cfg(feature = "v1_16")))]
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use std::slice;
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use glib::translate::{from_glib, ToGlib};
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#[cfg(any(feature = "v1_16", feature = "dox"))]
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#[cfg_attr(feature = "dox", doc(cfg(feature = "v1_16")))]
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use glib::translate::{from_glib_none, ToGlibPtr};
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use gst::prelude::*;
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#[repr(transparent)]
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pub struct AudioClippingMeta(ffi::GstAudioClippingMeta);
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unsafe impl Send for AudioClippingMeta {}
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unsafe impl Sync for AudioClippingMeta {}
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impl AudioClippingMeta {
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pub fn add<V: Into<gst::GenericFormattedValue>>(
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buffer: &mut gst::BufferRef,
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start: V,
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end: V,
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) -> gst::MetaRefMut<Self, gst::meta::Standalone> {
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skip_assert_initialized!();
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let start = start.into();
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let end = end.into();
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assert_eq!(start.get_format(), end.get_format());
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unsafe {
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let meta = ffi::gst_buffer_add_audio_clipping_meta(
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buffer.as_mut_ptr(),
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start.get_format().to_glib(),
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start.get_value() as u64,
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end.get_value() as u64,
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);
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Self::from_mut_ptr(buffer, meta)
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}
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}
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pub fn get_start(&self) -> gst::GenericFormattedValue {
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unsafe { gst::GenericFormattedValue::new(from_glib(self.0.format), self.0.start as i64) }
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}
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pub fn get_end(&self) -> gst::GenericFormattedValue {
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unsafe { gst::GenericFormattedValue::new(from_glib(self.0.format), self.0.end as i64) }
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}
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}
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unsafe impl MetaAPI for AudioClippingMeta {
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type GstType = ffi::GstAudioClippingMeta;
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fn get_meta_api() -> glib::Type {
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unsafe { from_glib(ffi::gst_audio_clipping_meta_api_get_type()) }
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}
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}
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impl fmt::Debug for AudioClippingMeta {
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fn fmt(&self, f: &mut fmt::Formatter) -> fmt::Result {
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f.debug_struct("AudioClippingMeta")
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.field("start", &self.get_start())
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.field("end", &self.get_end())
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.finish()
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}
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}
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#[cfg(any(feature = "v1_16", feature = "dox"))]
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#[cfg_attr(feature = "dox", doc(cfg(feature = "v1_16")))]
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#[repr(transparent)]
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pub struct AudioMeta(ffi::GstAudioMeta);
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#[cfg(any(feature = "v1_16", feature = "dox"))]
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#[cfg_attr(feature = "dox", doc(cfg(feature = "v1_16")))]
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unsafe impl Send for AudioMeta {}
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#[cfg(any(feature = "v1_16", feature = "dox"))]
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#[cfg_attr(feature = "dox", doc(cfg(feature = "v1_16")))]
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unsafe impl Sync for AudioMeta {}
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#[cfg(any(feature = "v1_16", feature = "dox"))]
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#[cfg_attr(feature = "dox", doc(cfg(feature = "v1_16")))]
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impl AudioMeta {
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pub fn add<'a>(
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buffer: &'a mut gst::BufferRef,
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info: &crate::AudioInfo,
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samples: usize,
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offsets: &[usize],
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) -> Result<gst::MetaRefMut<'a, Self, gst::meta::Standalone>, glib::BoolError> {
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skip_assert_initialized!();
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if !info.is_valid() {
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return Err(glib::bool_error!("Invalid audio info"));
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}
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if info.rate() == 0
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|| info.channels() == 0
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|| info.format() == crate::AudioFormat::Unknown
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|| info.format() == crate::AudioFormat::Encoded
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{
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return Err(glib::bool_error!("Unsupported audio format {:?}", info));
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}
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if !offsets.is_empty() && info.layout() != crate::AudioLayout::NonInterleaved {
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return Err(glib::bool_error!(
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"Channel offsets only supported for non-interleaved audio"
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));
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}
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if !offsets.is_empty() && offsets.len() != info.channels() as usize {
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return Err(glib::bool_error!(
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"Number of channel offsets different than number of channels ({} != {})",
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offsets.len(),
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info.channels()
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));
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}
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if info.layout() == crate::AudioLayout::NonInterleaved {
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let plane_size = samples * (info.width() / 8) as usize;
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let max_offset = if offsets.is_empty() {
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plane_size * (info.channels() - 1) as usize
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} else {
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let mut max_offset = None;
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for (i, offset) in offsets.iter().copied().enumerate() {
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if let Some(current_max_offset) = max_offset {
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max_offset = Some(std::cmp::max(current_max_offset, offset));
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} else {
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max_offset = Some(offset);
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}
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for (j, other_offset) in offsets.iter().copied().enumerate() {
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if i != j
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&& !(other_offset + plane_size <= offset
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|| offset + plane_size <= other_offset)
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{
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return Err(glib::bool_error!("Overlapping audio channel offsets: offset {} for channel {} and offset {} for channel {} with a plane size of {}", offset, i, other_offset, j, plane_size));
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}
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}
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}
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max_offset.unwrap()
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};
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if max_offset + plane_size > buffer.get_size() {
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return Err(glib::bool_error!("Audio channel offsets out of bounds: max offset {} with plane size {} and buffer size {}", max_offset, plane_size, buffer.get_size()));
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}
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}
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unsafe {
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let meta = ffi::gst_buffer_add_audio_meta(
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buffer.as_mut_ptr(),
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info.to_glib_none().0,
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samples,
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if offsets.is_empty() {
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ptr::null_mut()
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} else {
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offsets.as_ptr() as *mut _
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},
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);
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if meta.is_null() {
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return Err(glib::bool_error!("Failed to add audio meta"));
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}
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Ok(Self::from_mut_ptr(buffer, meta))
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}
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}
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pub fn get_info(&self) -> crate::AudioInfo {
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unsafe { from_glib_none(&self.0.info as *const _ as *mut ffi::GstAudioInfo) }
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}
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pub fn get_samples(&self) -> usize {
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self.0.samples
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}
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pub fn get_offsets(&self) -> &[usize] {
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if self.0.offsets.is_null() || self.0.info.channels < 1 {
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return &[];
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}
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unsafe { slice::from_raw_parts(self.0.offsets, self.0.info.channels as usize) }
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}
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}
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#[cfg(any(feature = "v1_16", feature = "dox"))]
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#[cfg_attr(feature = "dox", doc(cfg(feature = "v1_16")))]
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unsafe impl MetaAPI for AudioMeta {
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type GstType = ffi::GstAudioMeta;
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fn get_meta_api() -> glib::Type {
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unsafe { from_glib(ffi::gst_audio_meta_api_get_type()) }
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}
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}
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#[cfg(any(feature = "v1_16", feature = "dox"))]
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#[cfg_attr(feature = "dox", doc(cfg(feature = "v1_16")))]
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impl fmt::Debug for AudioMeta {
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fn fmt(&self, f: &mut fmt::Formatter) -> fmt::Result {
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f.debug_struct("AudioMeta")
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.field("info", &self.get_info())
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.field("samples", &self.get_samples())
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.field("offsets", &self.get_offsets())
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.finish()
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}
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}
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#[cfg(test)]
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mod tests {
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use super::*;
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#[test]
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fn test_add_get_meta() {
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use std::convert::TryInto;
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gst::init().unwrap();
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let mut buffer = gst::Buffer::with_size(1024).unwrap();
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{
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let cmeta = AudioClippingMeta::add(
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buffer.get_mut().unwrap(),
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gst::format::Default(Some(1)),
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gst::format::Default(Some(2)),
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);
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assert_eq!(
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cmeta.get_start().try_into(),
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Ok(gst::format::Default(Some(1)))
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);
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assert_eq!(
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cmeta.get_end().try_into(),
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Ok(gst::format::Default(Some(2)))
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);
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}
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{
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let cmeta = buffer.get_meta::<AudioClippingMeta>().unwrap();
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assert_eq!(
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cmeta.get_start().try_into(),
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Ok(gst::format::Default(Some(1)))
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);
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assert_eq!(
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cmeta.get_end().try_into(),
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Ok(gst::format::Default(Some(2)))
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);
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}
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}
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}
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