Command buffer batching

[aet]

I've had some use cases where I'm dealing with multiple recv/send video tracks and it's hard to profile how much time is spent in total when there's multiple command buffer submissions. It'll save some main/render thread processing time if we just submit the requests in batches. If needed to, you could do "once a frame" bookkeeping on the native side, flush, etc.

• Add WebRTC label for command buffer
• CPU texture updates through standard Unity plugin interface are simple and ok, but it doesn't scale if you need more performance or deal with multiple tracks. Lay out small groundwork for doing texture updates manually, but the actual changes to video renderer and GraphicsDevice will need to wait another day :) Basically it's uploading to CPU staging texture off render thread and only doing a native texture blit in the render thread for performance. There should be some opportunities to avoid CPU buffers entirely with hardware decoder support.
• WebRTC logging messages coming out from native side don't really benefit from printing out stack traces in developer builds, disable stack trace

[karasusan]

Sorry for the late confirmation. I checked the latest changeset and I found these errors below. Can you see it?

Detail(s): Message: Packages/com.unity.webrtc/Tests/Runtime/NativeAPITest.cs(295,42): error CS0117: 'NativeMethods' does not contain a definition for 'GetRenderEventFunc', File: Packages/com.unity.webrtc/Tests/Runtime/NativeAPITest.cs, Line: 295
Message: Packages/com.unity.webrtc/Tests/Runtime/NativeAPITest.cs(297,27): error CS0117: 'NativeMethods' does not contain a definition for 'GetRenderEventFunc', File: Packages/com.unity.webrtc/Tests/Runtime/NativeAPITest.cs, Line: 297
Message: Packages/com.unity.webrtc/Tests/Runtime/NativeAPITest.cs(341,42): error CS0117: 'NativeMethods' does not contain a definition for 'GetRenderEventFunc', File: Packages/com.unity.webrtc/Tests/Runtime/NativeAPITest.cs, Line: 341
Message: Packages/com.unity.webrtc/Tests/Runtime/NativeAPITest.cs(342,47): error CS0117: 'NativeMethods' does not contain a definition for 'GetRenderEventID', File: Packages/com.unity.webrtc/Tests/Runtime/NativeAPITest.cs, Line: 342
Message: Packages/com.unity.webrtc/Tests/Runtime/NativeAPITest.cs(345,30): error CS0426: The type name 'EncodeData' does not exist in the type 'VideoTrackSource', File: Packages/com.unity.webrtc/Tests/Runtime/NativeAPITest.cs, Line: 345
Message: Packages/com.unity.webrtc/Tests/Runtime/NativeAPITest.cs(345,69): error CS0426: The type name 'EncodeData' does not exist in the type 'VideoTrackSource', File: Packages/com.unity.webrtc/Tests/Runtime/NativeAPITest.cs, Line: 345
Message: Packages/com.unity.webrtc/Tests/Runtime/NativeAPITest.cs(346,86): error CS0426: The type name 'EncodeData' does not exist in the type 'VideoTrackSource', File: Packages/com.unity.webrtc/Tests/Runtime/NativeAPITest.cs, Line: 346
Message: Packages/com.unity.webrtc/Tests/Runtime/NativeAPITest.cs(348,13): error CS0103: The name 'VideoEncoderMethods' does not exist in the current context, File: Packages/com.unity.webrtc/Tests/Runtime/NativeAPITest.cs, Line: 348
Message: Packages/com.unity.webrtc/Tests/Runtime/NativeAPITest.cs(386,45): error CS0117: 'NativeMethods' does not contain a definition for 'GetRenderEventFunc', File: Packages/com.unity.webrtc/Tests/Runtime/NativeAPITest.cs, Line: 386
Message: Packages/com.unity.webrtc/Tests/Runtime/NativeAPITest.cs(387,47): error CS0117: 'NativeMethods' does not contain a definition for 'GetRenderEventID', File: Packages/com.unity.webrtc/Tests/Runtime/NativeAPITest.cs, Line: 387

[aet]

I'll have a look

[aet]

@karasusan should be all clear now!

[karasusan]

I found the bug in the unittest code. Could you add this change to your PR? https://github.com/Unity-Technologies/com.unity.webrtc/commit/658bd79aac45f447f9884257636b8b3d437fce41