Rename livekit_server to livekit_api (#24984)

The name `livekit_server` was a bit misleading as it is not a server and
gets built into both the client and server - the server code is in
`collab`.

Release Notes:

- N/A

crates/livekit_api/vendored/protocol/livekit_ingress.proto

@@ -0,0 +1,134 @@
+syntax = "proto3";
+
+package livekit;
+
+import "livekit_models.proto";
+
+option go_package = "github.com/livekit/protocol/livekit";
+option csharp_namespace = "LiveKit.Proto";
+option ruby_package = "LiveKit::Proto";
+
+service Ingress {
+    // Create a new Ingress
+    rpc CreateIngress(CreateIngressRequest) returns (IngressInfo);
+    // Update an existing Ingress. Ingress can only be updated when it's in ENDPOINT_WAITING state.
+    rpc UpdateIngress(UpdateIngressRequest) returns (IngressInfo);
+    rpc ListIngress(ListIngressRequest) returns (ListIngressResponse);
+    rpc DeleteIngress(DeleteIngressRequest) returns (IngressInfo);
+}
+
+message CreateIngressRequest {
+    IngressInput input_type = 1;
+    // User provided identifier for the ingress
+    string name = 2;
+    // room to publish to
+    string room_name = 3;
+    // publish as participant
+    string participant_identity = 4;
+    // name of publishing participant (used for display only)
+    string participant_name = 5;
+    IngressAudioOptions audio = 6;
+    IngressVideoOptions video = 7;
+}
+
+enum IngressInput {
+    RTMP_INPUT = 0;
+    //    FILE_INPUT = 1;
+    //    SRT_INPUT = 2;
+    //    URL_INPUT = 3;
+}
+
+message IngressAudioOptions {
+    string name = 1;
+    TrackSource source = 2;
+    // desired mime_type to publish to room
+    string mime_type = 3;
+    uint32 bitrate = 4;
+    bool disable_dtx = 5;
+    uint32 channels = 6;
+}
+
+message IngressVideoOptions {
+    string name = 1;
+    TrackSource source = 2;
+    // desired mime_type to publish to room
+    string mime_type = 3;
+    // simulcast layers to publish, when empty, it'll pick default simulcast
+    // layers at 1/2 and 1/4 of the dimensions
+    repeated VideoLayer layers = 4;
+}
+
+message IngressInfo {
+    string ingress_id = 1;
+    string name = 2;
+    string stream_key = 3;
+    string url = 4;
+    // for RTMP input, it'll be a rtmp:// URL
+    // for FILE input, it'll be a http:// URL
+    // for SRT input, it'll be a srt:// URL
+    IngressInput input_type = 5;
+    IngressAudioOptions audio = 6;
+    IngressVideoOptions video = 7;
+    string room_name = 8;
+    string participant_identity = 9;
+    string participant_name = 10;
+    bool reusable = 11;
+    IngressState state = 12; // Description of error/stream non compliance and debug info for publisher otherwise (received bitrate, resolution, bandwidth)
+
+    // NEXT_ID: 13
+}
+
+message IngressState {
+    enum Status {
+        ENDPOINT_INACTIVE = 0;
+        ENDPOINT_BUFFERING = 1;
+        ENDPOINT_PUBLISHING = 2;
+        ENDPOINT_ERROR = 3;
+    }
+
+    Status status = 1;
+    string error = 2; // Error/non compliance description if any
+    InputVideoState video = 3;
+    InputAudioState audio = 4;
+    string room_id = 5; // ID of the current/previous room published to
+    int64 started_at = 7;
+    repeated TrackInfo tracks = 6;
+}
+
+message InputVideoState {
+    uint32 mime_type = 1;
+//  uint32 bitrate = 2;
+    uint32 width = 3;
+    uint32 height = 4;
+    uint32 framerate = 5;
+}
+
+message InputAudioState {
+    uint32 mime_type = 1;
+//  uint32 bitrate = 2;
+    uint32 channels = 3;
+    uint32 sample_rate = 4;
+}
+
+message UpdateIngressRequest {
+    string ingress_id = 1;
+    string name = 2;
+    string room_name = 3;
+    string participant_identity = 4;
+    string participant_name = 5;
+    IngressAudioOptions audio = 6;
+    IngressVideoOptions video = 7;
+}
+
+message ListIngressRequest {
+    // when blank, lists all ingress endpoints
+    string room_name = 1;
+}
+
+message ListIngressResponse {
+    repeated IngressInfo items = 1;
+}
+
+message DeleteIngressRequest {
+    string ingress_id = 1;
+}