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Commit 7cd9cf70 authored by Glenn Kasten's avatar Glenn Kasten
Browse files

AudioRecord notification frames 

Change-Id: I76ec536d1504eb9a558178b62bf225aace4b40d1
parent 3151427b

include/media/AudioRecord.h

+4 −1
Original line number Diff line number Diff line
@@ -444,7 +444,10 @@ private: 
    void*                   mUserData;          // for client callback handler



    // for notification APIs

    uint32_t                mNotificationFrames; // frames between each notification callback

    uint32_t                mNotificationFramesReq; // requested number of frames between each

                                                    // notification callback

    uint32_t                mNotificationFramesAct; // actual number of frames between each

                                                    // notification callback

    bool                    mRefreshRemaining;  // processAudioBuffer() should refresh next 2



    // These are private to processAudioBuffer(), and are not protected by a lock

media/libmedia/AudioRecord.cpp

+27 −4
Original line number Diff line number Diff line
@@ -270,7 +270,8 @@ status_t AudioRecord::set( 


    mActive = false;

    mCbf = cbf;

    mNotificationFrames = notificationFrames;

    mNotificationFramesReq = notificationFrames;

    mNotificationFramesAct = 0;

    mRefreshRemaining = true;

    mUserData = user;

    // TODO: add audio hardware input latency here
@@ -458,7 +459,8 @@ status_t AudioRecord::openRecord_l( 
        if ((mTransfer != TRANSFER_CALLBACK) || (mAudioRecordThread == 0)) {

            ALOGW("AUDIO_INPUT_FLAG_FAST denied by client");

            // once denied, do not request again if IAudioRecord is re-created

            mFlags = (audio_input_flags_t) (flags & ~AUDIO_INPUT_FLAG_FAST);

            flags = (audio_input_flags_t) (flags & ~AUDIO_INPUT_FLAG_FAST);

            mFlags = flags;

        } else {

            trackFlags |= IAudioFlinger::TRACK_FAST;

            tid = mAudioRecordThread->getTid();
@@ -494,6 +496,27 @@ status_t AudioRecord::openRecord_l( 
    mCblkMemory = iMem;

    audio_track_cblk_t* cblk = static_cast<audio_track_cblk_t*>(iMem->pointer());

    mCblk = cblk;

    // FIXME missing fast track frameCount logic

    mAwaitBoost = false;

    mNotificationFramesAct = mNotificationFramesReq;

    if (flags & AUDIO_INPUT_FLAG_FAST) {

        if (trackFlags & IAudioFlinger::TRACK_FAST) {

            ALOGV("AUDIO_INPUT_FLAG_FAST successful; frameCount %u", frameCount);

            mAwaitBoost = true;

            // double-buffering is not required for fast tracks, due to tighter scheduling

            if (mNotificationFramesAct == 0 || mNotificationFramesAct > frameCount) {

                mNotificationFramesAct = frameCount;

            }

        } else {

            ALOGV("AUDIO_INPUT_FLAG_FAST denied by server; frameCount %u", frameCount);

            // once denied, do not request again if IAudioRecord is re-created

            flags = (audio_input_flags_t) (flags & ~AUDIO_INPUT_FLAG_FAST);

            mFlags = flags;

            if (mNotificationFramesAct == 0 || mNotificationFramesAct > frameCount/2) {

                mNotificationFramesAct = frameCount/2;

            }

        }

    }



    // starting address of buffers in shared memory

    void *buffers = (char*)cblk + sizeof(audio_track_cblk_t);
@@ -501,7 +524,7 @@ status_t AudioRecord::openRecord_l( 
    // update proxy

    mProxy = new AudioRecordClientProxy(cblk, buffers, frameCount, mFrameSize);

    mProxy->setEpoch(epoch);

    mProxy->setMinimum(mNotificationFrames);

    mProxy->setMinimum(mNotificationFramesAct);



    mDeathNotifier = new DeathNotifier(this);

    mAudioRecord->asBinder()->linkToDeath(mDeathNotifier, this);
@@ -748,7 +771,7 @@ nsecs_t AudioRecord::processAudioBuffer(const sp<AudioRecordThread>& thread) 
    }



    // Cache other fields that will be needed soon

    size_t notificationFrames = mNotificationFrames;

    size_t notificationFrames = mNotificationFramesAct;

    if (mRefreshRemaining) {

        mRefreshRemaining = false;

        mRemainingFrames = notificationFrames;