feat: video publishing (#42)

- Prepare webrtc abstraction ( for future wasm support )
- Added track publish support for videos
  - Added LogoTrack example to simple_room demo
- Lot of cleanup
- There are compiler warnings I'll solve on our v1 release

livekit-webrtc/src/lib.rs

@@ -1,15 +1,48 @@
+use thiserror::Error;
+
+#[cfg_attr(target_arch = "wasm32", path = "web/mod.rs")]
+#[cfg_attr(not(target_arch = "wasm32"), path = "native/mod.rs")]
+mod imp;
+
+#[derive(Debug, Copy, Clone, PartialEq, Eq)]
+pub enum MediaType {
+    Audio,
+    Video,
+    Data,
+    Unsupported,
+}
+
+#[derive(Debug, Copy, Clone, PartialEq, Eq)]
+pub enum RtcErrorType {
+    Internal,
+    InvalidSdp,
+    InvalidState,
+}
+
+#[derive(Error, Debug)]
+#[error("an RtcError occured: {error_type:?} - {message}")]
+pub struct RtcError {
+    pub error_type: RtcErrorType,
+    pub message: String,
+}
+
 pub mod data_channel;
-pub mod jsep;
+pub mod ice_candidate;
 pub mod media_stream;
 pub mod peer_connection;
 pub mod peer_connection_factory;
 pub mod prelude;
-pub mod rtc_error;
 pub mod rtp_parameters;
 pub mod rtp_receiver;
 pub mod rtp_sender;
 pub mod rtp_transceiver;
+pub mod session_description;
 pub mod video_frame;
-pub mod video_frame_buffer;
-pub mod webrtc;
-pub mod yuv_helper;
+pub mod video_source;
+pub mod video_stream;
+
+#[cfg(not(target_arch = "wasm32"))]
+pub mod native {
+    pub use crate::imp::yuv_helper;
+    pub use webrtc_sys::webrtc::ffi::create_random_uuid;
+}