AudioFlinger: add check for NULL mInput in MMAP Thread

exitStandby() was crashing if headphones were
unplugged between the open and start of a MMAP stream.

Bug: 120564294
Test: see repro steps in bug
Change-Id: Ic42743682ffeb48f2869eaa90581b4e4f7fcb1ab

parent b079c02b

services/audioflinger/Threads.cpp

+7 −1

Original line number	Diff line number	Diff line
		@@ -9146,7 +9146,13 @@ AudioFlinger::MmapCaptureThread::MmapCaptureThread(

		status_t AudioFlinger::MmapCaptureThread::exitStandby()
		{
		{
		// mInput might have been cleared by clearInput()
		Mutex::Autolock _l(mLock);
		if (mInput != nullptr && mInput->stream != nullptr) {
		mInput->stream->setGain(1.0f);
		}
		}
		return MmapThread::exitStandby();
		}