forked from mirrors/gstreamer-rs
sdp: Add media iterators for bandwidths, formats, connections and attributes
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parent
ab2dbe0234
commit
37fd226836
2 changed files with 104 additions and 1 deletions
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@ -57,7 +57,7 @@ pub use sdp_connection::*;
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mod sdp_key;
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pub use sdp_key::*;
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mod sdp_media;
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pub use sdp_media::*;
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pub use sdp_media::{SDPMedia, SDPMediaRef};
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mod sdp_message;
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pub use sdp_message::*;
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mod sdp_origin;
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@ -169,6 +169,22 @@ impl SDPMediaRef {
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unsafe { from_glib_full(ffi::gst_sdp_media_as_text(&self.0)) }
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}
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pub fn attributes(&self) -> AttributesIter {
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AttributesIter::new(self)
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}
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pub fn formats(&self) -> FormatsIter {
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FormatsIter::new(self)
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}
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pub fn bandwidths(&self) -> BandwidthsIter {
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BandwidthsIter::new(self)
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}
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pub fn connections(&self) -> ConnectionsIter {
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ConnectionsIter::new(self)
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}
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pub fn attributes_len(&self) -> u32 {
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unsafe { ffi::gst_sdp_media_attributes_len(&self.0) }
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}
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@ -514,3 +530,90 @@ impl SDPMediaRef {
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}
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}
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}
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macro_rules! define_iter(
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($name:ident, $typ:ty, $get_item:expr, $get_len:expr) => {
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#[derive(Debug)]
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pub struct $name<'a> {
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media: &'a SDPMediaRef,
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idx: u32,
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len: u32,
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}
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impl<'a> $name<'a> {
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fn new(media: &'a SDPMediaRef) -> $name<'a> {
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skip_assert_initialized!();
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let len = $get_len(media);
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$name {
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media,
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idx: 0,
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len,
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}
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}
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}
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impl<'a> Iterator for $name<'a> {
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type Item = $typ;
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fn next(&mut self) -> Option<Self::Item> {
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if self.idx >= self.len {
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return None;
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}
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let item = $get_item(self.media, self.idx)?;
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self.idx += 1;
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Some(item)
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}
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fn size_hint(&self) -> (usize, Option<usize>) {
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if self.idx == self.len {
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return (0, Some(0))
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}
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let remaining = (self.len - self.idx) as usize;
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(remaining, Some(remaining))
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}
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}
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impl<'a> DoubleEndedIterator for $name<'a> {
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fn next_back(&mut self) -> Option<Self::Item> {
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if self.idx == self.len {
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return None;
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}
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self.len -= 1;
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$get_item(self.media, self.len)
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}
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}
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impl<'a> ExactSizeIterator for $name<'a> {}
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}
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);
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define_iter!(
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BandwidthsIter,
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&'a SDPBandwidth,
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|media: &'a SDPMediaRef, idx| media.get_bandwidth(idx),
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|media: &SDPMediaRef| media.bandwidths_len()
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);
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define_iter!(
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FormatsIter,
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&'a str,
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|media: &'a SDPMediaRef, idx| media.get_format(idx),
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|media: &SDPMediaRef| media.formats_len()
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);
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define_iter!(
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ConnectionsIter,
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&'a SDPConnection,
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|media: &'a SDPMediaRef, idx| media.get_connection(idx),
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|media: &SDPMediaRef| media.connections_len()
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);
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define_iter!(
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AttributesIter,
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&'a SDPAttribute,
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|media: &'a SDPMediaRef, idx| media.get_attribute(idx),
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|media: &SDPMediaRef| media.attributes_len()
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);
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