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use std::{collections::HashMap, convert::TryFrom, rc::Rc};
use derive_more::Display;
use medea_client_api_proto::{MediaSourceKind, TrackId};
use tracerr::Traced;
use crate::{
media::{
track::local, AudioTrackConstraints, MediaKind, MediaStreamSettings,
TrackConstraints, VideoSource,
},
utils::{JsCaused, JsError},
DeviceVideoTrackConstraints, DisplayVideoTrackConstraints,
};
#[derive(Clone, Debug, Display, JsCaused)]
pub enum TracksRequestError {
#[display(fmt = "only one audio track is allowed in SimpleTracksRequest")]
TooManyAudioTracks,
#[display(
fmt = "only one device video track is allowed in SimpleTracksRequest"
)]
TooManyDeviceVideoTracks,
#[display(
fmt = "only one display video track is allowed in SimpleTracksRequest"
)]
TooManyDisplayVideoTracks,
#[display(fmt = "SimpleTracksRequest should have at least one track")]
NoTracks,
#[display(fmt = "provided multiple audio MediaStreamTracks")]
ExpectedAudioTracks,
#[display(fmt = "provided multiple device video MediaStreamTracks")]
ExpectedDeviceVideoTracks,
#[display(fmt = "provided multiple display video MediaStreamTracks")]
ExpectedDisplayVideoTracks,
#[display(
fmt = "provided audio track does not satisfy specified constraints"
)]
InvalidAudioTrack,
#[display(
fmt = "provided video track does not satisfy specified constraints"
)]
InvalidVideoTrack,
}
type Result<T> = std::result::Result<T, Traced<TracksRequestError>>;
#[derive(Debug, Default)]
pub struct TracksRequest {
audio: HashMap<TrackId, AudioTrackConstraints>,
device_video: HashMap<TrackId, DeviceVideoTrackConstraints>,
display_video: HashMap<TrackId, DisplayVideoTrackConstraints>,
}
impl TracksRequest {
pub fn add_track_request<T: Into<TrackConstraints>>(
&mut self,
track_id: TrackId,
caps: T,
) {
match caps.into() {
TrackConstraints::Audio(audio) => {
self.audio.insert(track_id, audio);
}
TrackConstraints::Video(video) => match video {
VideoSource::Device(device) => {
self.device_video.insert(track_id, device);
}
VideoSource::Display(display) => {
self.display_video.insert(track_id, display);
}
},
}
}
}
#[derive(Debug)]
pub struct SimpleTracksRequest {
audio: Option<(TrackId, AudioTrackConstraints)>,
display_video: Option<(TrackId, DisplayVideoTrackConstraints)>,
device_video: Option<(TrackId, DeviceVideoTrackConstraints)>,
}
impl SimpleTracksRequest {
pub fn parse_tracks(
&self,
tracks: Vec<Rc<local::Track>>,
) -> Result<HashMap<TrackId, Rc<local::Track>>> {
use TracksRequestError::{InvalidAudioTrack, InvalidVideoTrack};
let mut parsed_tracks = HashMap::new();
let mut display_video_tracks = Vec::new();
let mut device_video_tracks = Vec::new();
let mut audio_tracks = Vec::new();
for track in tracks {
match track.kind() {
MediaKind::Audio => {
audio_tracks.push(track);
}
MediaKind::Video => match track.media_source_kind() {
MediaSourceKind::Device => {
device_video_tracks.push(track);
}
MediaSourceKind::Display => {
display_video_tracks.push(track);
}
},
}
}
if let Some((id, audio)) = &self.audio {
if let Some(track) = audio_tracks.into_iter().next() {
if audio.satisfies(track.sys_track()) {
parsed_tracks.insert(*id, track);
} else {
return Err(tracerr::new!(InvalidAudioTrack));
}
}
}
if let Some((id, device_video)) = &self.device_video {
if let Some(track) = device_video_tracks.into_iter().next() {
if device_video.satisfies(track.sys_track()) {
parsed_tracks.insert(*id, track);
} else {
return Err(tracerr::new!(InvalidVideoTrack));
}
}
}
if let Some((id, display_video)) = &self.display_video {
if let Some(track) = display_video_tracks.into_iter().next() {
if display_video.satisfies(track.sys_track()) {
parsed_tracks.insert(*id, track);
} else {
return Err(tracerr::new!(InvalidVideoTrack));
}
}
}
Ok(parsed_tracks)
}
pub fn merge<T: Into<MediaStreamSettings>>(
&mut self,
other: T,
) -> Result<()> {
let other = other.into();
if let Some((_, audio_caps)) = &self.audio {
if !other.is_audio_enabled() {
if audio_caps.required() {
return Err(tracerr::new!(
TracksRequestError::ExpectedAudioTracks
));
}
self.audio.take();
}
}
if let Some((_, device_video_caps)) = &self.device_video {
if !other.is_device_video_enabled() {
if device_video_caps.required() {
return Err(tracerr::new!(
TracksRequestError::ExpectedDeviceVideoTracks
));
}
self.device_video.take();
}
}
if let Some((_, display_video_caps)) = &self.display_video {
if !other.is_display_video_enabled() {
if display_video_caps.required() {
return Err(tracerr::new!(
TracksRequestError::ExpectedDisplayVideoTracks
));
}
self.display_video.take();
}
}
if other.is_audio_enabled() {
if let Some((_, audio)) = self.audio.as_mut() {
audio.merge(other.get_audio().clone());
}
}
if other.is_display_video_enabled() {
if let Some((_, display_video)) = self.display_video.as_mut() {
if let Some(other_display_video) = other.get_display_video() {
display_video.merge(other_display_video);
}
}
}
if other.is_device_video_enabled() {
if let Some((_, device_video)) = self.device_video.as_mut() {
if let Some(other_device_video) = other.get_device_video() {
device_video.merge(other_device_video.clone());
}
}
}
Ok(())
}
}
impl TryFrom<TracksRequest> for SimpleTracksRequest {
type Error = TracksRequestError;
fn try_from(
value: TracksRequest,
) -> std::result::Result<Self, Self::Error> {
use TracksRequestError::{
NoTracks, TooManyAudioTracks, TooManyDeviceVideoTracks,
TooManyDisplayVideoTracks,
};
if value.device_video.len() > 1 {
return Err(TooManyDeviceVideoTracks);
} else if value.display_video.len() > 1 {
return Err(TooManyDisplayVideoTracks);
} else if value.audio.len() > 1 {
return Err(TooManyAudioTracks);
} else if value.device_video.is_empty()
&& value.display_video.is_empty()
&& value.audio.is_empty()
{
return Err(NoTracks);
}
let mut req = Self {
audio: None,
device_video: None,
display_video: None,
};
for (id, audio) in value.audio {
req.audio.replace((id, audio));
}
for (id, device) in value.device_video {
req.device_video.replace((id, device));
}
for (id, display) in value.display_video {
req.display_video.replace((id, display));
}
Ok(req)
}
}
impl From<&SimpleTracksRequest> for MediaStreamSettings {
fn from(request: &SimpleTracksRequest) -> Self {
let mut constraints = Self::new();
if let Some((_, audio)) = &request.audio {
constraints.audio(audio.clone());
}
if let Some((_, device_video)) = &request.device_video {
constraints.device_video(device_video.clone());
}
if let Some((_, display_video)) = &request.display_video {
constraints.display_video(display_video.clone());
}
constraints
}
}