Crate moq

Expand description

C bindings for moq_net.

Provides a C-compatible API for real-time pub/sub over QUIC.

§Concepts

Session: Network connection to a MoQ relay
Origin: Collection of broadcasts
Broadcast: Container for tracks
Track: Named stream of groups
Group: Collection of frames
Frame: Sized payload with timestamp

§Error Handling

All functions return negative error codes on failure or non-negative values on success. Resources are managed through opaque integer handles that must be explicitly closed.

Structs§

Audio
DecoderOutput: What moq_decode_video delivers per frame: the requested CPU pixel format and target size, validated up front so the delivery loop never second-guesses.
Id: Opaque resource identifier returned to C code.
Video: Raw-video state: encoders being published, plus decoder tasks and their buffered decoded frames.
moq_announce_update: A route announcement or retraction from an origin.
moq_audio_config: Information about an audio rendition in the catalog.
moq_audio_decoder_output: PCM layout the caller wants out of moq_decode_audio.
moq_audio_encoder_input: PCM layout the caller hands to moq_encode_audio_frame.
moq_audio_encoder_output: Codec-side configuration. sample_rate / channels = 0 means “match the input (snapping the rate up to a libopus-supported value if necessary)”.
moq_audio_frame: One audio frame: payload bytes plus a presentation timestamp.
moq_audio_init: Configuration for moq_publish_audio.
moq_client_config: Settings for moq_session_connect, or NULL to dial with the defaults.
moq_connection_snapshot: Statistics and protocol sampled from the same connection by moq_session_snapshot.
moq_connection_stats: A snapshot of connection statistics, filled in by moq_session_stats.
moq_container: The container of a video or audio rendition, plus whatever that container needs to describe itself.
moq_container_init: Configuration for moq_publish_container.
moq_datagram: A best-effort raw track datagram delivered via moq_consume_datagrams.
moq_frame: Information about a frame of media.
moq_json_snapshot_config: Options for a JSON snapshot track (lossy latest-value mode).
moq_json_stream_config: Options for a JSON stream track (lossless append-log mode).
moq_json_value: A JSON value delivered by a consumer callback.
moq_protocol_error: A protocol failure a peer sent: scope, verbatim wire code, and recognized kind.
moq_route: A route advertisement: hops and costs.
moq_section: One untyped application catalog section: a name and its JSON value.
moq_string: A borrowed UTF-8 string slice, NOT NULL terminated.
moq_subscription: Subscriber-side raw track delivery preferences.
moq_track_info: Publisher-side raw track properties.
moq_video_config: Information about a video rendition in the catalog.
moq_video_decoder_output: Decode-side configuration the caller passes to moq_decode_video.
moq_video_encoder_frame: One raw frame handed to moq_encode_video_frame.
moq_video_encoder_input: Raw frame layout the caller hands to moq_encode_video_frame, plus the resolution and rate the encoder is opened at. Every published frame must match width x height; scale before publishing if your source moves.
moq_video_encoder_output: Codec-side configuration for moq_encode_video. Every knob spells “unset” as 0.
moq_video_frame: One decoded video frame from moq_decode_video: pixels plus a presentation timestamp.
moq_video_hint: Optional catalog fields for moq_video_init::hint.
moq_video_init: Configuration for moq_publish_video.
moq_video_properties: Catalog properties shared by every video rendition.

Enums§

Error: Error types that can occur in the FFI layer.
moq_audio_format: A single audio codec moq_publish_audio can parse.
moq_audio_sample_format: Raw PCM sample layout, mirroring WebCodecs AudioData.format.
moq_container_format: A container moq_publish_container can demux, which may publish several tracks.
moq_container_kind: How a media track’s frames are wrapped, independent of the codec.
moq_demand: Whether a published track has subscribers, as reported by a demand watcher.
moq_error_scope: Whether a protocol code is from the session or stream registry.
moq_protocol_kind: A recognized protocol kind. Pair with moq_error_scope: CANCEL is 0 on a session and 1 on a stream. APP and UNKNOWN keep the numeric code in moq_protocol_error.
moq_video_codec: Output video codec for moq_encode_video.
moq_video_encoder_kind: Which encoder implementation moq_encode_video should use.
moq_video_format: A single video codec moq_publish_video can parse.
moq_video_pixel_format: Pixel layout of the raw frames handed to moq_encode_video_frame.

Constants§

Functions§

moq_bandwidth_close: Release a bandwidth handle. Reservations taken against it stay until they themselves are closed (or the session’s allocator is gone).
moq_bandwidth_reserve: Reserve up to max_bps for track, returning a reservation handle.
moq_broadcast_request_accept: Accept a broadcast request with an unannounced broadcast producer.
moq_broadcast_request_free: Free a broadcast request without accepting or rejecting it.
moq_broadcast_request_path^⚠: The path of a broadcast request delivered to a moq_origin_dynamic callback.
moq_broadcast_request_reject: Reject a broadcast request with an application error code.
moq_client_defaults: The settings moq_session_connect dials with when given NULL.
moq_consume_audio^⚠: Consume an audio track from a broadcast, emitting the frames in order.
moq_consume_audio_cancel: Stop an audio track consumer’s background task.
moq_consume_audio_config^⚠: Query information about an audio track in a catalog.
moq_consume_catalog^⚠: Create a catalog consumer for a broadcast.
moq_consume_catalog_cancel: Stop a catalog consumer’s background subscription.
moq_consume_catalog_free: Free a catalog snapshot received via the moq_consume_catalog callback.
moq_consume_catalog_section^⚠: Look up an application catalog section by name.
moq_consume_catalog_section_at^⚠: Query an application catalog section by index, keyed by name.
moq_consume_catalog_section_count: Number of untyped application catalog sections in a catalog snapshot.
moq_consume_close: Close a broadcast consumer and clean up its resources.
moq_consume_datagram^⚠: Read a datagram delivered via the moq_consume_datagrams callback.
moq_consume_datagram_free: Free a datagram delivered via the moq_consume_datagrams callback, releasing its payload.
moq_consume_datagrams^⚠: Subscribe to a raw track’s best-effort datagrams by name.
moq_consume_datagrams_cancel: Stop a datagram subscription’s background task.
moq_consume_frame^⚠: Get a chunk of a frame’s payload.
moq_consume_frame_free: Free a decoded frame delivered via a moq_consume_video or moq_consume_audio callback.
moq_consume_json_cancel: Stop a JSON consumer’s background task (snapshot or stream).
moq_consume_json_snapshot^⚠: Subscribe to a JSON snapshot track (lossy latest-value) by name.
moq_consume_json_stream^⚠: Subscribe to a JSON stream track (lossless append-log) by name.
moq_consume_json_value^⚠: Read a JSON value delivered via a moq_consume_json_snapshot or moq_consume_json_stream callback.
moq_consume_json_value_free: Release a JSON value delivered via a consumer callback.
moq_consume_track^⚠: Subscribe to a raw track by name, delivering each frame’s payload as-is.
moq_consume_track_cancel: Stop a raw track consumer’s background task.
moq_consume_track_frame^⚠: Read a raw frame’s payload delivered via the moq_consume_track callback.
moq_consume_track_frame_free: Free a raw frame delivered via the moq_consume_track callback, releasing its payload.
moq_consume_track_update^⚠: Update a raw track subscription’s delivery preferences.
moq_consume_video^⚠: Consume a video track from a broadcast, delivering frames in order.
moq_consume_video_cancel: Stop a video track consumer’s background task.
moq_consume_video_config^⚠: Query information about a video track in a catalog.
moq_consume_video_properties^⚠: Query the catalog properties shared by every video rendition.
moq_consume_video_stalled^⚠: Query whether the publisher recommends temporarily avoiding a video rendition.
moq_decode_audio^⚠: Subscribe to an audio track and decode it into PCM.
moq_decode_audio_cancel: Stop an audio (raw PCM) consumer’s background task.
moq_decode_audio_frame^⚠: Copy a delivered frame’s metadata into dst.
moq_decode_audio_frame_free: Free a frame previously delivered through the consume callback. Required for every delivered frame ID; closing the parent consumer is not enough.
moq_decode_video^⚠: Subscribe to a video track and decode it into raw frames in the requested CPU pixel format and size (see moq_video_decoder_output).
moq_decode_video_cancel: Stop a video (raw) consumer’s background task.
moq_decode_video_frame^⚠: Copy a delivered frame’s metadata into dst.
moq_decode_video_frame_free: Free a frame previously delivered through the consume callback. Required for every delivered frame id; closing the parent consumer is not enough.
moq_encode_audio^⚠: Open an audio track on a broadcast.
moq_encode_audio_demand^⚠: Watch whether the encoded audio track has subscribers, so the microphone and encoder run only while someone listens. See crate::moq_publish_media_demand for the callback contract.
moq_encode_audio_finish: Flush any pending samples and finalize an audio producer.
moq_encode_audio_frame^⚠: Push one audio frame.
moq_encode_audio_reservation: This encoder’s bandwidth reservation, or 0 if it was published without one.
moq_encode_video^⚠: Open a video track on a broadcast, encoding the raw frames you publish to it.
moq_encode_video_bitrate: Retune a live encoder to bitrate bits per second, taking effect from roughly the next frame. No keyframe is forced, so this is cheap enough to drive from a congestion controller.
moq_encode_video_cut: Cut a new group at the next published frame.
moq_encode_video_demand^⚠: Watch whether the encoded video track has subscribers, so the camera and encoder run only while someone watches. See crate::moq_publish_media_demand for the callback contract.
moq_encode_video_finish: Flush any frames the codec is still holding and finalize the video track.
moq_encode_video_frame^⚠: Encode and publish one raw frame.
moq_encode_video_reservation: This encoder’s bandwidth reservation, or 0 if it was published without one.
moq_error: Human-readable reason for the most recent failed call on the calling thread.
moq_error_protocol^⚠: Structured protocol details for the most recent failed call on the calling thread.
moq_group_request_abort: Reject a group request with an application error code, failing the waiting fetches.
moq_group_request_accept: Accept a group request, resolving the waiting fetches with the group you then fill.
moq_group_request_frame_start^⚠: The first frame of the group the fetch wants; 0 is the whole group.
moq_group_request_free: Free a group request without accepting it, which rejects it.
moq_group_request_priority^⚠: The delivery priority the fetching consumer asked for.
moq_group_request_sequence^⚠: The group sequence a group request asks for.
moq_log_level^⚠: Initialize the library with a log level.
moq_origin_announced^⚠: Learn about broadcasts matching a pattern scope under an origin.
moq_origin_announced_broadcast^⚠: Consume a broadcast from an origin by path, waiting until something can serve it.
moq_origin_announced_broadcast_cancel: Abort a wait started by moq_origin_announced_broadcast.
moq_origin_announced_cancel: Stop receiving announcements for broadcasts published to an origin.
moq_origin_announced_free: Free a single announcement delivered to a moq_origin_announced on_announce callback.
moq_origin_announced_info^⚠: Query information about a broadcast discovered by moq_origin_announced.
moq_origin_close: Close an origin and clean up its resources.
moq_origin_create: Create an origin for publishing broadcasts.
moq_origin_create_broadcast^⚠: Create a broadcast at path on an origin, for publishing media tracks.
moq_origin_dynamic^⚠: Advertise prefix and serve the requests beneath it.
moq_origin_dynamic_cancel: Stop serving and retract the route.
moq_origin_dynamic_update^⚠: Re-price a served route in place. The prefix cannot change.
moq_origin_request^⚠: Request a broadcast from an origin by path, resolving as soon as it can be served.
moq_origin_request_cancel: Abort a request started by moq_origin_request.
moq_publish_announce^⚠: Advertise a broadcast’s exact path as a route.
moq_publish_audio^⚠: Publish one audio codec as a new media track.
moq_publish_audio_config^⚠: Add or replace an audio rendition in a broadcast’s catalog.
moq_publish_audio_remove^⚠: Remove an audio rendition from a broadcast’s catalog by name.
moq_publish_catalog_section^⚠: Set (or replace) a top-level application catalog section by name.
moq_publish_catalog_section_remove^⚠: Remove a top-level application catalog section by name.
moq_publish_container^⚠: Publish a container, which demuxes and publishes its own tracks.
moq_publish_container_cut: Declare that the next chunk starts a new segment, rolling a group on every track the container publishes.
moq_publish_container_finish: Finish every track the container publishes and release the handle.
moq_publish_container_seek: Start a new segment and number its groups sequence.
moq_publish_container_write^⚠: Write a whole chunk of container bytes.
moq_publish_demand_cancel: Stop a demand watcher from moq_publish_track_demand, moq_publish_media_demand, crate::moq_encode_video_demand, or crate::moq_encode_audio_demand.
moq_publish_dynamic^⚠: Serve subscriber requests for tracks the broadcast has not declared.
moq_publish_dynamic_cancel: Stop a request handler from moq_publish_dynamic, moq_publish_track_dynamic, or moq_track_request_dynamic. Requests not yet delivered are rejected.
moq_publish_finish: Finish a broadcast and release it, ending its catalog cleanly.
moq_publish_group_abort: Abort a raw group with an application error code.
moq_publish_group_finish: Finish a raw group. No more frames can be written.
moq_publish_group_frame^⚠: Write a frame into a raw group created by moq_publish_track_group.
moq_publish_json_snapshot^⚠: Create a JSON snapshot track (lossy latest-value) on a broadcast.
moq_publish_json_snapshot_finish: Finish a JSON snapshot track. No more values can be published.
moq_publish_json_snapshot_update^⚠: Publish a new value to a JSON snapshot track. value is a UTF-8 JSON document. A no-op if unchanged from the previous update.
moq_publish_json_stream^⚠: Create a JSON stream track (lossless append-log) on a broadcast.
moq_publish_json_stream_append^⚠: Append one record to a JSON stream track. value is a UTF-8 JSON document.
moq_publish_json_stream_finish: Finish a JSON stream track. No more records can be appended.
moq_publish_media_cut: Draw a group boundary on a media importer.
moq_publish_media_demand^⚠: Watch whether a media track has subscribers, so an encoder runs only while someone watches.
moq_publish_media_finish: Finish a media track, flushing any buffered frames. No more frames can be written.
moq_publish_media_frame^⚠: Write data to a track.
moq_publish_media_seek: Draw a group boundary and number the next group sequence.
moq_publish_track^⚠: Create a raw track on a broadcast for arbitrary byte payloads.
moq_publish_track_abort: Abort a raw track with an application error code.
moq_publish_track_datagram^⚠: Send a best-effort datagram on a raw track created by moq_publish_track.
moq_publish_track_demand^⚠: Watch whether a raw track has subscribers. See moq_publish_media_demand for the callback contract.
moq_publish_track_dynamic^⚠: Serve fetches of groups a raw track no longer has cached.
moq_publish_track_finish: Finish a raw track. No more groups or frames can be written.
moq_publish_track_finish_at: Declare a raw track’s exclusive final group sequence.
moq_publish_track_frame^⚠: Write a single-frame group to a raw track with a timestamp.
moq_publish_track_group: Append a new group to a raw track, returning a group producer.
moq_publish_track_group_at: Create a raw group with an explicit sequence number.
moq_publish_unannounce: Retract a broadcast’s exact-path advertisement, if any.
moq_publish_video^⚠: Publish one video codec as a new media track.
moq_publish_video_config^⚠: Add or replace a video rendition in a broadcast’s catalog.
moq_publish_video_properties^⚠: Replace the catalog properties shared by every video rendition.
moq_publish_video_remove^⚠: Remove a video rendition from a broadcast’s catalog by name.
moq_qlog_supported: Whether this build can capture qlog traces.
moq_reservation_close: Release a reservation, handing its share back to siblings.
moq_reservation_grant^⚠: This reservation’s slice right now, in bits per second.
moq_reservation_update: Change the ceiling, keeping the same claim.
moq_session_bandwidth: The session’s bandwidth allocator. Clones share one reservation registry.
moq_session_close: Request that a session shut down.
moq_session_connect^⚠: Start establishing a connection to a MoQ server.
moq_session_snapshot^⚠: Snapshot statistics and the negotiated protocol from the same live connection.
moq_session_stats^⚠: Snapshot the current connection statistics for a session.
moq_track_request_abort: Reject a track request with an application error code, failing the waiting subscribers.
moq_track_request_accept^⚠: Accept a track request as a raw track, resolving the waiting subscribers.
moq_track_request_audio^⚠: Accept a track request as an audio track, the importer picking the timescale.
moq_track_request_dynamic^⚠: Serve fetches of uncached groups on a requested track, before accepting it.
moq_track_request_free: Free a track request without accepting it, which rejects it.
moq_track_request_name^⚠: The name of a track request delivered to a moq_publish_dynamic callback.
moq_track_request_video^⚠: Accept a track request as a video track, the importer picking the timescale.
moq_versions^⚠: List the protocol versions offered during the handshake by default.

Type Aliases§

Status: Status code returned by FFI functions.
moq_status_callback: A callback receiving a positive handle/value, zero on clean completion, or a negative error.

Crate moq

Crate moq Copy item path

§Concepts

§Error Handling

Structs§

Enums§

Constants§

Functions§

Type Aliases§

Crate moq