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Process the `moof` atom.

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Fun fact: I hate Rust's borrow checker
This commit is contained in:
Wanjohi
2024-01-01 14:45:09 +03:00
parent 1f2e3a3565
commit a6d44d585c
1 changed files with 45 additions and 4 deletions
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49
src/media.rs
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@@ -81,9 +81,6 @@ impl Mp4Parser {
}
struct State {
// We hold on to publisher so we don't close then while media is still being published.
broadcast: broadcast::Publisher,
// Atoms in init sequence that must be repeated at each key frame.
ftype_atom: Option<Mp4Atom>,
moov_atom: Option<Mp4Atom>,
@@ -109,6 +106,14 @@ struct State {
wave: String,
video_enc: Option<String>,
mp4_parser: Mp4Parser,
// We hold on to publisher so we don't close then while media is still being published.
broadcast: broadcast::Publisher,
catalog: Option<track::Publisher>,
init: Option<track::Publisher>,
// Tracks based on their track ID.
tracks: Option<HashMap<u32, Track>>,
}
pub struct GST {}
@@ -141,6 +146,11 @@ impl GST {
broadcast: broadcast.to_owned(),
mp4_parser: Mp4Parser::new(),
video_enc: None,
catalog: None,
init: None,
// Tracks based on their track ID.
tracks: None,
}));
let mut state_lock = state.lock().unwrap();
@@ -300,6 +310,7 @@ impl GST {
loop {
let mut state = state.lock().unwrap();
let mut current = None;
match state.mp4_parser.pop_atom() {
Some(atom) => {
@@ -393,6 +404,9 @@ impl GST {
// Create the catalog track
Self::serve_catalog(&mut catalog, &init_track.name, &moov).map_err(|_| gst::FlowError::Error)?;
state.tracks = Some(tracks);
state.init = Some(init_track);
state.catalog = Some(catalog);
}
_ => {
log::warn!("Received moov without ftype");
@@ -400,8 +414,35 @@ impl GST {
}
},
ATOM_TYPE_MOOF => {
state.moof_atom = Some(atom);
log::info!("moof_atom={:?}", state.moof_atom);
let tracks = if let Some(tracks) = &mut state.tracks {
tracks
} else {
log::warn!("Tracks are not set up yet");
return Err(gst::FlowError::Error);
};
let mut reader = Cursor::new(atom.atom_bytes.clone());
let header = mp4::BoxHeader::read(&mut reader).map_err(|_| gst::FlowError::Error)?;
let moof = mp4::MoofBox::read_box(&mut reader, header.size).map_err(|_| gst::FlowError::Error)?;
// Process the moof.
let fragment = Fragment::new(moof).map_err(|_| gst::FlowError::Error)?;
// Get the track for this moof.
let track = tracks.get_mut(&fragment.track).context("failed to find track").map_err(|_| gst::FlowError::Error)?;
// Save the track ID for the next iteration, which must be a mdat.
if current.is_none(){
log::info!("multiple moof atoms")
}
current.replace(fragment.track);
// Publish the moof header, creating a new segment if it's a keyframe.
track.header(atom.atom_bytes.clone(), fragment).context("failed to publish moof").map_err(|_| gst::FlowError::Error)?;
state.moof_atom = Some(atom);
},
ATOM_TYPE_MDAT => {
let mdat_atom = atom;