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//! Wrapper around an [RTCRtpCodecCapability].
//!
//! [RTCRtpCodecCapability]: https://w3.org/TR/webrtc#dom-rtcrtpcodeccapability
use std::collections::HashMap;
use dart_sys::Dart_Handle;
use medea_macro::dart_bridge;
use super::utils::{
dart_future::FutureFromDart, dart_string_into_rust, list::DartList,
};
use crate::{
media::MediaKind,
platform::{
codec_capability::CodecCapabilityError as Error,
dart::utils::handle::DartHandle,
},
};
#[dart_bridge("flutter/lib/src/native/platform/codec_capability.g.dart")]
mod codec_capability {
use std::{ffi::c_char, ptr};
use dart_sys::Dart_Handle;
use crate::platform::Error;
extern "C" {
/// Returns [RTCRtpSender]'s available [RTCRtpCodecCapability][1]s.
///
/// [RTCRtpSender]: https://w3.org/TR/webrtc#dom-rtcrtpsender
/// [1]: https://w3.org/TR/webrtc#dom-rtcrtpcodeccapability
pub fn get_sender_codec_capabilities(
kind: i64,
) -> Result<Dart_Handle, Error>;
/// Returns [RTCRtpReceiver]'s available [RTCRtpCodecCapability][1]s.
///
/// [RTCRtpReceiver]: https://w3.org/TR/webrtc#dom-rtcrtpreceiver
/// [1]: https://w3.org/TR/webrtc#dom-rtcrtpcodeccapability
pub fn get_receiver_codec_capabilities(
kind: i64,
) -> Result<Dart_Handle, Error>;
/// Returns [mimeType][2] of the provided [RTCRtpCodec][1].
///
/// [1]: https://w3.org/TR/webrtc#dom-rtcrtpcodec
/// [2]: https://w3.org/TR/webrtc#dom-rtcrtpcodec-mimetype
pub fn mime_type(
codec_capability: Dart_Handle,
) -> Result<ptr::NonNull<c_char>, Error>;
/// Returns [clockRate][2] of the provided [RTCRtpCodec][1].
///
/// [1]: https://w3.org/TR/webrtc#dom-rtcrtpcodec
/// [2]: https://w3.org/TR/webrtc#dom-rtcrtpcodec-clockrate
pub fn clock_rate(codec_capability: Dart_Handle) -> Result<u32, Error>;
/// Returns [channels][2] of the provided [RTCRtpCodec][1].
///
/// [1]: https://w3.org/TR/webrtc#dom-rtcrtpcodec
/// [2]: https://w3.org/TR/webrtc#dom-rtcrtpcodec-channels
pub fn channels(codec_capability: Dart_Handle) -> Result<u32, Error>;
/// Returns [sdpFmtpLine][2] of the provided [RTCRtpCodec][1].
///
/// [1]: https://w3.org/TR/webrtc#dom-rtcrtpcodec
/// [2]: https://w3.org/TR/webrtc#dom-rtcrtpcodec-sdpfmtpline
pub fn parameters(
codec_capability: Dart_Handle,
) -> Result<ptr::NonNull<c_char>, Error>;
}
}
/// Dart side representation of an [RTCRtpCodecCapability].
///
/// [RTCRtpCodecCapability]: https://w3.org/TR/webrtc#dom-rtcrtpcodeccapability
#[derive(Clone, Debug)]
pub struct CodecCapability(DartHandle);
impl From<DartHandle> for CodecCapability {
fn from(value: DartHandle) -> Self {
Self(value)
}
}
impl CodecCapability {
/// Returns available [RTCRtpSender]'s [`CodecCapability`]s.
///
/// # Errors
///
/// With [`Error::FailedToGetCapabilities`] if fails to retrieve
/// capabilities.
///
/// [RTCRtpSender]: https://w3.org/TR/webrtc#dom-rtcrtpsender
pub async fn get_sender_codec_capabilities(
kind: MediaKind,
) -> Result<Vec<Self>, Error> {
let fut = unsafe {
codec_capability::get_sender_codec_capabilities(kind as i64)
}
.unwrap();
#[expect(clippy::map_err_ignore, reason = "not useful")]
let res: DartHandle = unsafe { FutureFromDart::execute(fut) }
.await
.map_err(|_| Error::FailedToGetCapabilities)?;
Ok(Vec::from(DartList::from(res))
.into_iter()
.map(|caps: DartHandle| Self::from(caps))
.collect())
}
/// Returns available [RTCRtpReceiver]'s [`CodecCapability`]s.
///
/// # Errors
///
/// With [`Error::FailedToGetCapabilities`] if fails to retrieve
/// [`CodecCapability`]s.
///
/// [RTCRtpReceiver]: https://w3.org/TR/webrtc#dom-rtcrtpreceiver
pub async fn get_receiver_codec_capabilities(
kind: MediaKind,
) -> Result<Vec<Self>, Error> {
let fut = unsafe {
codec_capability::get_receiver_codec_capabilities(kind as i64)
}
.unwrap();
#[expect(clippy::map_err_ignore, reason = "not useful")]
let res: DartHandle = unsafe { FutureFromDart::execute(fut) }
.await
.map_err(|_| Error::FailedToGetCapabilities)?;
Ok(Vec::from(DartList::from(res))
.into_iter()
.map(|caps: DartHandle| Self::from(caps))
.collect())
}
/// Returns [mimeType][2] of this [`CodecCapability`].
///
/// [2]: https://w3.org/TR/webrtc#dom-rtcrtpcodec-mimetype
#[must_use]
pub fn mime_type(&self) -> String {
let mime_type =
unsafe { codec_capability::mime_type(self.0.get()) }.unwrap();
unsafe { dart_string_into_rust(mime_type) }
}
/// Returns [clockRate][2] of this [`CodecCapability`].
///
/// [2]: https://w3.org/TR/webrtc#dom-rtcrtpcodec-clockrate
#[must_use]
pub fn clock_rate(&self) -> u32 {
unsafe { codec_capability::clock_rate(self.0.get()) }.unwrap()
}
/// Returns [channels][2] of this [`CodecCapability`].
///
/// [2]: https://w3.org/TR/webrtc#dom-rtcrtpcodec-channels
#[must_use]
pub fn channels(&self) -> Option<u16> {
let channels =
unsafe { codec_capability::channels(self.0.get()) }.unwrap();
if channels > 0 { u16::try_from(channels).ok() } else { None }
}
/// Returns [sdpFmtpLine][2] of this [`CodecCapability`].
///
/// [2]: https://w3.org/TR/webrtc#dom-rtcrtpcodec-sdpfmtpline
#[must_use]
pub fn parameters(&self) -> HashMap<String, String> {
let params_json_ptr =
unsafe { codec_capability::parameters(self.0.get()) }.unwrap();
let params_json = unsafe { dart_string_into_rust(params_json_ptr) };
serde_json::from_str(¶ms_json).unwrap_or_else(|_| {
log::error!("Failed to parse codec params: {params_json}");
HashMap::new()
})
}
/// Returns the underlying [`Dart_Handle`] of this [`CodecCapability`].
#[must_use]
pub fn handle(&self) -> Dart_Handle {
self.0.get()
}
}