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Commit 7ed66a1a authored by Phil Burk's avatar Phil Burk
Browse files

AudioFlinger: allow small requested capacity for FAST path 

AudioFlinger used to reject requests for the low latency FAST
path when the capacity was != mPipeFramesP2.
But if the caller requests < mPipeFramesP2 than we can just bump it
up to mPipeFramesP2 because the API allows that.

For example, on Pixel, mPipeFramesP2 is 4096

Bug: 80308183
Test: adb shell input_monitor_callback -pl -b4000 -m1
Test: should see performance mode 12 for LOW_LATENCY
Change-Id: I987067910de3194fb52370d0ea1626cffad6248c
parent 8263e351

services/audioflinger/Threads.cpp

+4 −2
Original line number Diff line number Diff line
@@ -7454,8 +7454,10 @@ sp<AudioFlinger::RecordThread::RecordTrack> AudioFlinger::RecordThread::createRe 
            // we formerly checked for a callback handler (non-0 tid),

            // but that is no longer required for TRANSFER_OBTAIN mode

            //

            // frame count is not specified, or is exactly the pipe depth

            ((frameCount == 0) || (frameCount == mPipeFramesP2)) &&

            // Frame count is not specified (0), or is less than or equal the pipe depth.

            // It is OK to provide a higher capacity than requested.

            // We will force it to mPipeFramesP2 below.

            (frameCount <= mPipeFramesP2) &&

            // PCM data

            audio_is_linear_pcm(format) &&

            // hardware format