17abeed7ae
Dropped frames never requested a keyframe, SessionEnded skipped ordered stop (portal/TV/FFI leak, next start could abort), and a late end could kill the following cast. Failed starts left PlatformClientPosix alive. DLNA leaked its HTTP server and ignored portal EOS. Also: start no longer blocks the daemon actor, IPC accept/request loops stay up, HLS Range is clamped, LAN IP follows the renderer subnet, and the picker closes before the portal dialog and handles Escape.
40 lines
1.8 KiB
Markdown
40 lines
1.8 KiB
Markdown
# Vendoring notes
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This is [rust_cast 0.21.0](https://github.com/azasypkin/rust-cast) (MIT
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licensed), vendored via `[patch.crates-io]` in the workspace `Cargo.toml`
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purely to add one method upstream doesn't have: a generic point-to-point
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send on an arbitrary CASTV2 namespace.
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## Why
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breadcast's Cast Streaming integration (`breadcast-caststream-sys`, wrapping
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a vendored `chromium/openscreen`) needs to exchange OFFER/ANSWER JSON with a
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launched receiver app on the `urn:x-cast:com.google.cast.webrtc` namespace --
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a point-to-point conversation targeting that app's `transport_id`, the same
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target `ConnectionChannel`/`MediaChannel` already use. None of rust_cast's
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built-in channels expose that: `ReceiverChannel::broadcast_message()` is the
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closest, but it hardcodes destination `"*"`, which is a different
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conversation than a namespace-specific exchange with one particular app.
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Receiving such messages needs no patch -- `CastDevice::receive()` already
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returns them as `ChannelMessage::Raw(CastMessage)` whenever no built-in
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channel claims the namespace.
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## The patch
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`src/lib.rs`: added `CastDevice::send_message(&self, namespace: &str,
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destination: &str, message: &str)`, built the same way
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`ReceiverChannel::broadcast_message()` is internally, but with a
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caller-supplied `destination` instead of a hardcoded `"*"`. The payload is
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a raw string (already-serialized JSON from the vendored openscreen C++),
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not a `Serialize` value -- a generic `M: Serialize` would double-encode
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the OFFER. See the doc comment on that method (marked "LOCAL PATCH
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(breadcast, not upstream)").
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## Rolling the pin
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To move to a newer rust_cast release: copy the new version from
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`~/.cargo/registry/src/*/rust_cast-<version>/`, re-apply the same method
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addition (small enough to redo by hand), swap the version in this
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directory's own `Cargo.toml`, and update the `path` if the directory name
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changes.
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