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Commit 0825031e authored by Eric Laurent's avatar Eric Laurent Committed by Andy Hung
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AudioSystem: add APIs to control HAL stream latency mode 

Add API to AudioSystem and AudioFlinger to discover and control
the latency modes supported by audio HAL streams

Bug: 218273231
Test: make
Merged-In: I84c2325301cc7a4cf058fa076d0645ede877b54f
Change-Id: I84c2325301cc7a4cf058fa076d0645ede877b54f
parent b22c6b25

media/libaudioclient/AidlConversion.cpp

+20 −0
Original line number Diff line number Diff line
@@ -3388,4 +3388,24 @@ ConversionResult<int32_t> legacy2aidl_audio_direct_mode_t_int32_t_mask(audio_dir 
            enumToMask_index<int32_t, media::AudioDirectMode>);

}



ConversionResult<audio_latency_mode_t>

aidl2legacy_LatencyMode_audio_latency_mode_t(media::LatencyMode aidl) {

    switch (aidl) {

        case media::LatencyMode::FREE:

            return AUDIO_LATENCY_MODE_FREE;

        case media::LatencyMode::LOW:

            return AUDIO_LATENCY_MODE_LOW;

    }

    return unexpected(BAD_VALUE);

}

ConversionResult<media::LatencyMode>

legacy2aidl_audio_latency_mode_t_LatencyMode(audio_latency_mode_t legacy) {

    switch (legacy) {

        case AUDIO_LATENCY_MODE_FREE:

            return media::LatencyMode::FREE;

        case AUDIO_LATENCY_MODE_LOW:

            return media::LatencyMode::LOW;

    }

    return unexpected(BAD_VALUE);

}

}  // namespace android

media/libaudioclient/Android.bp

+1 −0
Original line number Diff line number Diff line
@@ -356,6 +356,7 @@ aidl_interface { 
        "aidl/android/media/AudioUniqueIdUse.aidl",

        "aidl/android/media/AudioVibratorInfo.aidl",

        "aidl/android/media/EffectDescriptor.aidl",

        "aidl/android/media/LatencyMode.aidl",

        "aidl/android/media/TrackSecondaryOutputInfo.aidl",

    ],

    imports: [

media/libaudioclient/AudioSystem.cpp

+85 −0
Original line number Diff line number Diff line
@@ -670,6 +670,30 @@ Status AudioSystem::AudioFlingerClient::ioConfigChanged( 
    return Status::ok();

}



Status AudioSystem::AudioFlingerClient::onSupportedLatencyModesChanged(

        int output, const std::vector<media::LatencyMode>& latencyModes) {

    audio_io_handle_t outputLegacy = VALUE_OR_RETURN_BINDER_STATUS(

            aidl2legacy_int32_t_audio_io_handle_t(output));

    std::vector<audio_latency_mode_t> modesLegacy = VALUE_OR_RETURN_BINDER_STATUS(

            convertContainer<std::vector<audio_latency_mode_t>>(

                    latencyModes, aidl2legacy_LatencyMode_audio_latency_mode_t));



    std::vector<sp<SupportedLatencyModesCallback>> callbacks;

    {

        Mutex::Autolock _l(mLock);

        for (auto callback : mSupportedLatencyModesCallbacks) {

            if (auto ref = callback.promote(); ref != nullptr) {

                callbacks.push_back(ref);

            }

        }

    }

    for (const auto& callback : callbacks) {

        callback->onSupportedLatencyModesChanged(outputLegacy, modesLegacy);

    }



    return Status::ok();

}



status_t AudioSystem::AudioFlingerClient::getInputBufferSize(

        uint32_t sampleRate, audio_format_t format,

        audio_channel_mask_t channelMask, size_t* buffSize) {
@@ -749,6 +773,31 @@ status_t AudioSystem::AudioFlingerClient::removeAudioDeviceCallback( 
    return NO_ERROR;

}



status_t AudioSystem::AudioFlingerClient::addSupportedLatencyModesCallback(

        const sp<SupportedLatencyModesCallback>& callback) {

    Mutex::Autolock _l(mLock);

    if (std::find(mSupportedLatencyModesCallbacks.begin(),

                  mSupportedLatencyModesCallbacks.end(),

                  callback) != mSupportedLatencyModesCallbacks.end()) {

        return INVALID_OPERATION;

    }

    mSupportedLatencyModesCallbacks.push_back(callback);

    return NO_ERROR;

}



status_t AudioSystem::AudioFlingerClient::removeSupportedLatencyModesCallback(

        const sp<SupportedLatencyModesCallback>& callback) {

    Mutex::Autolock _l(mLock);

    auto it = std::find(mSupportedLatencyModesCallbacks.begin(),

                                 mSupportedLatencyModesCallbacks.end(),

                                 callback);

    if (it == mSupportedLatencyModesCallbacks.end()) {

        return INVALID_OPERATION;

    }

    mSupportedLatencyModesCallbacks.erase(it);

    return NO_ERROR;

}



/* static */ uintptr_t AudioSystem::addErrorCallback(audio_error_callback cb) {

    Mutex::Autolock _l(gLockErrorCallbacks);

    gAudioErrorCallbacks.insert(cb);
@@ -1662,6 +1711,24 @@ status_t AudioSystem::removeAudioDeviceCallback( 
    return afc->removeAudioDeviceCallback(callback, audioIo, portId);

}



status_t AudioSystem::addSupportedLatencyModesCallback(

        const sp<SupportedLatencyModesCallback>& callback) {

    const sp<AudioFlingerClient> afc = getAudioFlingerClient();

    if (afc == 0) {

        return NO_INIT;

    }

    return afc->addSupportedLatencyModesCallback(callback);

}



status_t AudioSystem::removeSupportedLatencyModesCallback(

        const sp<SupportedLatencyModesCallback>& callback) {

    const sp<AudioFlingerClient> afc = getAudioFlingerClient();

    if (afc == 0) {

        return NO_INIT;

    }

    return afc->removeSupportedLatencyModesCallback(callback);

}



audio_port_handle_t AudioSystem::getDeviceIdForIo(audio_io_handle_t audioIo) {

    const sp<IAudioFlinger>& af = AudioSystem::get_audio_flinger();

    if (af == 0) return PERMISSION_DENIED;
@@ -2341,6 +2408,24 @@ status_t AudioSystem::getDirectProfilesForAttributes(const audio_attributes_t* a 
    return NO_ERROR;

}



status_t AudioSystem::setRequestedLatencyMode(

            audio_io_handle_t output, audio_latency_mode_t mode) {

    const sp<IAudioFlinger>& af = AudioSystem::get_audio_flinger();

    if (af == nullptr) {

        return PERMISSION_DENIED;

    }

    return af->setRequestedLatencyMode(output, mode);

}



status_t AudioSystem::getSupportedLatencyModes(audio_io_handle_t output,

        std::vector<audio_latency_mode_t>* modes) {

    const sp<IAudioFlinger>& af = AudioSystem::get_audio_flinger();

    if (af == nullptr) {

        return PERMISSION_DENIED;

    }

    return af->getSupportedLatencyModes(output, modes);

}



class CaptureStateListenerImpl : public media::BnCaptureStateListener,

                                 public IBinder::DeathRecipient {

public:

media/libaudioclient/IAudioFlinger.cpp

+51 −0
Original line number Diff line number Diff line
@@ -810,6 +810,33 @@ status_t AudioFlingerClientAdapter::setDeviceConnectedState( 
    return statusTFromBinderStatus(mDelegate->setDeviceConnectedState(aidlPort, connected));

}



status_t AudioFlingerClientAdapter::setRequestedLatencyMode(

        audio_io_handle_t output, audio_latency_mode_t mode) {

    int32_t outputAidl = VALUE_OR_RETURN_STATUS(legacy2aidl_audio_io_handle_t_int32_t(output));

    media::LatencyMode modeAidl  = VALUE_OR_RETURN_STATUS(

            legacy2aidl_audio_latency_mode_t_LatencyMode(mode));

    return statusTFromBinderStatus(mDelegate->setRequestedLatencyMode(outputAidl, modeAidl));

}



status_t AudioFlingerClientAdapter::getSupportedLatencyModes(

        audio_io_handle_t output, std::vector<audio_latency_mode_t>* modes) {

    if (modes == nullptr) {

        return BAD_VALUE;

    }



    int32_t outputAidl = VALUE_OR_RETURN_STATUS(legacy2aidl_audio_io_handle_t_int32_t(output));

    std::vector<media::LatencyMode> modesAidl;



    RETURN_STATUS_IF_ERROR(statusTFromBinderStatus(

            mDelegate->getSupportedLatencyModes(outputAidl, &modesAidl)));



    *modes = VALUE_OR_RETURN_STATUS(

            convertContainer<std::vector<audio_latency_mode_t>>(modesAidl,

                     aidl2legacy_LatencyMode_audio_latency_mode_t));



    return NO_ERROR;

}



////////////////////////////////////////////////////////////////////////////////////////////////////

// AudioFlingerServerAdapter

AudioFlingerServerAdapter::AudioFlingerServerAdapter(
@@ -1304,4 +1331,28 @@ Status AudioFlingerServerAdapter::setDeviceConnectedState( 
    return Status::fromStatusT(mDelegate->setDeviceConnectedState(&portLegacy, connected));

}



Status AudioFlingerServerAdapter::setRequestedLatencyMode(

        int32_t output, media::LatencyMode modeAidl) {

    audio_io_handle_t outputLegacy = VALUE_OR_RETURN_BINDER(

            aidl2legacy_int32_t_audio_io_handle_t(output));

    audio_latency_mode_t modeLegacy = VALUE_OR_RETURN_BINDER(

            aidl2legacy_LatencyMode_audio_latency_mode_t(modeAidl));

    return Status::fromStatusT(mDelegate->setRequestedLatencyMode(

            outputLegacy, modeLegacy));

}



Status AudioFlingerServerAdapter::getSupportedLatencyModes(

        int output, std::vector<media::LatencyMode>* _aidl_return) {

    audio_io_handle_t outputLegacy = VALUE_OR_RETURN_BINDER(

            aidl2legacy_int32_t_audio_io_handle_t(output));

    std::vector<audio_latency_mode_t> modesLegacy;



    RETURN_BINDER_IF_ERROR(mDelegate->getSupportedLatencyModes(outputLegacy, &modesLegacy));



    *_aidl_return = VALUE_OR_RETURN_BINDER(

            convertContainer<std::vector<media::LatencyMode>>(

                    modesLegacy, legacy2aidl_audio_latency_mode_t_LatencyMode));

    return Status::ok();

}



} // namespace android

media/libaudioclient/aidl/android/media/IAudioFlingerClient.aidl

+7 −0
Original line number Diff line number Diff line
@@ -18,6 +18,7 @@ package android.media; 


import android.media.AudioIoConfigEvent;

import android.media.AudioIoDescriptor;

import android.media.LatencyMode;



/**

 * A callback interface for AudioFlinger.
@@ -27,4 +28,10 @@ import android.media.AudioIoDescriptor; 
interface IAudioFlingerClient {

    oneway void ioConfigChanged(AudioIoConfigEvent event,

                                in AudioIoDescriptor ioDesc);

    /**

     * Called when the latency modes supported on a given output stream change.

     * output is the I/O handle of the output stream for which the change is signalled.

     * latencyModes is the new list of supported latency modes (See LatencyMode.aidl).

     */

    oneway void onSupportedLatencyModesChanged(int output, in LatencyMode[] latencyModes);

}