claincly a8c54dd378 Fix ExternalTextureManager: repeated queueing input frame in preview ... TL;DR: we should check if there are new frames available to queue to the ExternalTextureProcessor before actually queueing a frame. The overall flow on the external texture processor: - `SurfaceTexture.onFrameAvailable` is called on `ExtTexMgr`, and - it calls `updateTexImage()`, and sets `frame` - it calls `maybeQueueFrameToExtTexProc()` - the frame is queued to `ExtTexProc` if `frame` is set - From `ExtTexProc.queueInputFrame()`: - notifies the `frameProcessorListener` of available frame - notifies the `inputListener` of `onReadyToAcceptInputFrame` - (`ExtTexMgr` is the listener), it calls `maybeQueueFrameToExtTexProc()` again -- Parallelly -- - `ExtTexProc` calls `inputListener.onInputFrameProcessed`, when the frame is released - (`ExtTexMgr` is the listener), sets `frame` to `null` *Problem* This logic relies on `frame` to be cleared at the right time. In transformer, it's OK b/c `ExtTexProc` release the frame immediately in `queueInputFrame()` and calls `onInputFrameProcessed` which also reset `frame` But in previewing, the frame is not released for a while, up to 10 ms. In this case, `frame` will not reset in this 10 ms, and `maybeQueueFrameToExtTexProc()` is repeatedly queueing the same input frame. PiperOrigin-RevId: 470211620		2022-10-19 19:47:30 +00:00
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android_libs/media/libraries/effect	Fix ExternalTextureManager: repeated queueing input frame in preview	2022-10-19 19:47:30 +00:00