音频策略配置文件分析
来源：互联网 发布：数据预处理常用函数 编辑：程序博客网 时间：2024/06/05 06:08
<globalConfiguration speaker_drc_enabled="true"/><modules> <!-- Primary Audio HAL --> <module name="primary" halVersion="2.0"> <attachedDevices> <item>Earpiece</item> <item>Speaker</item> <item>Built-In Mic</item> <item>Built-In Back Mic</item> <item>FM Tuner</item> <item>In Call-Voice</item> </attachedDevices> <defaultOutputDevice>Speaker</defaultOutputDevice> <mixPorts> <mixPort name="primary output" role="source" flags="AUDIO_OUTPUT_FLAG_PRIMARY"> <profile name="" format="AUDIO_FORMAT_PCM_16_BIT" samplingRates="48000" channelMasks="AUDIO_CHANNEL_OUT_STEREO"/> </mixPort> <mixPort name="low_latency" role="source" flags="AUDIO_OUTPUT_FLAG_FAST"> <profile name="" format="AUDIO_FORMAT_PCM_16_BIT" samplingRates="44100,48000" channelMasks="AUDIO_CHANNEL_OUT_STEREO"/> </mixPort> <mixPort name="compressed_offload" role="source" flags="AUDIO_OUTPUT_FLAG_DIRECT|AUDIO_OUTPUT_FLAG_COMPRESS_OFFLOAD|AUDIO_OUTPUT_FLAG_NON_BLOCKING"> <profile name="" format="AUDIO_FORMAT_MP3" samplingRates="8000,11025,12000,16000,22050,24000,32000,44100,48000" channelMasks="AUDIO_CHANNEL_OUT_STEREO,AUDIO_CHANNEL_OUT_MONO"/> <profile name="" format="AUDIO_FORMAT_AAC_LC" samplingRates="8000,11025,12000,16000,22050,24000,32000,44100,48000,64000,88200,96000" channelMasks="AUDIO_CHANNEL_OUT_STEREO,AUDIO_CHANNEL_OUT_MONO"/> <profile name="" format="AUDIO_FORMAT_AAC_HE_V1" samplingRates="8000,11025,12000,16000,22050,24000,32000,44100,48000,64000,88200,96000" channelMasks="AUDIO_CHANNEL_OUT_STEREO,AUDIO_CHANNEL_OUT_MONO"/> <profile name="" format="AUDIO_FORMAT_AAC_HE_V2" samplingRates="8000,11025,12000,16000,22050,24000,32000,44100,48000,64000,88200,96000" channelMasks="AUDIO_CHANNEL_OUT_STEREO,AUDIO_CHANNEL_OUT_MONO"/> </mixPort> <mixPort name="voip_rx" role="source" flags="AUDIO_OUTPUT_FLAG_DIRECT|AUDIO_OUTPUT_FLAG_VOIP_RX"> <profile name="" format="AUDIO_FORMAT_PCM_16_BIT" samplingRates="8000,16000" channelMasks="AUDIO_CHANNEL_OUT_MONO"/> <profile name="" format="AUDIO_FORMAT_AMR_NB" samplingRates="8000,16000" channelMasks="AUDIO_CHANNEL_OUT_MONO"/> <profile name="" format="AUDIO_FORMAT_AMR_WB" samplingRates="8000,16000" channelMasks="AUDIO_CHANNEL_OUT_MONO"/> <profile name="" format="AUDIO_FORMAT_QCELP" samplingRates="8000,16000" channelMasks="AUDIO_CHANNEL_OUT_MONO"/> <profile name="" format="AUDIO_FORMAT_EVRC" samplingRates="8000,16000" channelMasks="AUDIO_CHANNEL_OUT_MONO"/> <profile name="" format="AUDIO_FORMAT_EVRCB" samplingRates="8000,16000" channelMasks="AUDIO_CHANNEL_OUT_MONO"/> <profile name="" format="AUDIO_FORMAT_EVRCWB" samplingRates="8000,16000" channelMasks="AUDIO_CHANNEL_OUT_MONO"/> <profile name="" format="AUDIO_FORMAT_EVRCNW" samplingRates="8000,16000" channelMasks="AUDIO_CHANNEL_OUT_MONO"/> </mixPort> <mixPort name="primary input" role="sink"> <profile name="" format="AUDIO_FORMAT_PCM_16_BIT" samplingRates="8000,11025,12000,16000,22050,24000,32000,44100,48000" channelMasks="AUDIO_CHANNEL_IN_MONO,AUDIO_CHANNEL_IN_STEREO,AUDIO_CHANNEL_IN_FRONT_BACK"/> <profile name="" format="AUDIO_FORMAT_AMR_NB" samplingRates="8000,11025,12000,16000,22050,24000,32000,44100,48000" channelMasks="AUDIO_CHANNEL_IN_MONO,AUDIO_CHANNEL_IN_STEREO,AUDIO_CHANNEL_IN_FRONT_BACK"/> <profile name="" format="AUDIO_FORMAT_AMR_WB" samplingRates="8000,11025,12000,16000,22050,24000,32000,44100,48000" channelMasks="AUDIO_CHANNEL_IN_MONO,AUDIO_CHANNEL_IN_STEREO,AUDIO_CHANNEL_IN_FRONT_BACK"/> <profile name="" format="AUDIO_FORMAT_QCELP" samplingRates="8000,11025,12000,16000,22050,24000,32000,44100,48000" channelMasks="AUDIO_CHANNEL_IN_MONO,AUDIO_CHANNEL_IN_STEREO,AUDIO_CHANNEL_IN_FRONT_BACK"/> <profile name="" format="AUDIO_FORMAT_EVRC" samplingRates="8000,11025,12000,16000,22050,24000,32000,44100,48000" channelMasks="AUDIO_CHANNEL_IN_MONO,AUDIO_CHANNEL_IN_STEREO,AUDIO_CHANNEL_IN_FRONT_BACK"/> <profile name="" format="AUDIO_FORMAT_EVRCB" samplingRates="8000,11025,12000,16000,22050,24000,32000,44100,48000" channelMasks="AUDIO_CHANNEL_IN_MONO,AUDIO_CHANNEL_IN_STEREO,AUDIO_CHANNEL_IN_FRONT_BACK"/> <profile name="" format="AUDIO_FORMAT_EVRCWB" samplingRates="8000,11025,12000,16000,22050,24000,32000,44100,48000" channelMasks="AUDIO_CHANNEL_IN_MONO,AUDIO_CHANNEL_IN_STEREO,AUDIO_CHANNEL_IN_FRONT_BACK"/> <profile name="" format="AUDIO_FORMAT_EVRCNW" samplingRates="8000,11025,12000,16000,22050,24000,32000,44100,48000" channelMasks="AUDIO_CHANNEL_IN_MONO,AUDIO_CHANNEL_IN_STEREO,AUDIO_CHANNEL_IN_FRONT_BACK"/> </mixPort> </mixPorts> <devicePorts> <!-- Output devices declaration, i.e. Sink DEVICE PORT --> <devicePort tagName="Earpiece" type="AUDIO_DEVICE_OUT_EARPIECE" role="sink"> <profile name="" format="AUDIO_FORMAT_PCM_16_BIT" samplingRates="48000" channelMasks="AUDIO_CHANNEL_IN_MONO"/> </devicePort> <devicePort tagName="Speaker" role="sink" type="AUDIO_DEVICE_OUT_SPEAKER" address=""> <profile name="" format="AUDIO_FORMAT_PCM_16_BIT" samplingRates="48000" channelMasks="AUDIO_CHANNEL_OUT_STEREO"/> </devicePort> <devicePort tagName="Wired Headset" type="AUDIO_DEVICE_OUT_WIRED_HEADSET" role="sink"> <profile name="" format="AUDIO_FORMAT_PCM_16_BIT" samplingRates="48000" channelMasks="AUDIO_CHANNEL_OUT_STEREO"/> </devicePort> <devicePort tagName="Wired Headphones" type="AUDIO_DEVICE_OUT_WIRED_HEADPHONE" role="sink"> <profile name="" format="AUDIO_FORMAT_PCM_16_BIT" samplingRates="48000" channelMasks="AUDIO_CHANNEL_OUT_STEREO"/> </devicePort> <devicePort tagName="Line" type="AUDIO_DEVICE_OUT_LINE" role="sink"> <profile name="" format="AUDIO_FORMAT_PCM_16_BIT" samplingRates="48000" channelMasks="AUDIO_CHANNEL_OUT_STEREO"/> </devicePort> <devicePort tagName="BT SCO" type="AUDIO_DEVICE_OUT_BLUETOOTH_SCO" role="sink"> <profile name="" format="AUDIO_FORMAT_PCM_16_BIT" samplingRates="8000,16000" channelMasks="AUDIO_CHANNEL_OUT_MONO"/> </devicePort> <devicePort tagName="BT SCO Headset" type="AUDIO_DEVICE_OUT_BLUETOOTH_SCO_HEADSET" role="sink"> <profile name="" format="AUDIO_FORMAT_PCM_16_BIT" samplingRates="8000,16000" channelMasks="AUDIO_CHANNEL_OUT_MONO"/> </devicePort> <devicePort tagName="BT SCO Car Kit" type="AUDIO_DEVICE_OUT_BLUETOOTH_SCO_CARKIT" role="sink"> <profile name="" format="AUDIO_FORMAT_PCM_16_BIT" samplingRates="8000,16000" channelMasks="AUDIO_CHANNEL_OUT_MONO"/> </devicePort> <devicePort tagName="BT SCO All" type="AUDIO_DEVICE_OUT_ALL_SCO" role="sink"> <profile name="" format="AUDIO_FORMAT_PCM_16_BIT" samplingRates="8000,16000" channelMasks="AUDIO_CHANNEL_OUT_MONO"/> </devicePort> <devicePort tagName="Proxy" type="AUDIO_DEVICE_OUT_PROXY" role="sink"> <profile name="" format="AUDIO_FORMAT_PCM_16_BIT" samplingRates="8000,11025,16000,22050,32000,44100,48000, 64000,88200,96000,128000,176400,192000" channelMasks="dynamic"/> </devicePort> <devicePort tagName="FM" type="AUDIO_DEVICE_OUT_FM" role="sink"> <profile name="" format="AUDIO_FORMAT_PCM_16_BIT" samplingRates="48000" channelMasks="AUDIO_CHANNEL_OUT_MONO,AUDIO_CHANNEL_OUT_STEREO"/> </devicePort> <devicePort tagName="Built-In Mic" type="AUDIO_DEVICE_IN_BUILTIN_MIC" role="source"> <profile name="" format="AUDIO_FORMAT_PCM_16_BIT" samplingRates="8000,11025,12000,16000,22050,24000,32000,44100,48000" channelMasks="AUDIO_CHANNEL_IN_MONO,AUDIO_CHANNEL_IN_STEREO,AUDIO_CHANNEL_IN_FRONT_BACK"/> </devicePort> <devicePort tagName="Built-In Back Mic" type="AUDIO_DEVICE_IN_BACK_MIC" role="source"> <profile name="" format="AUDIO_FORMAT_PCM_16_BIT" samplingRates="8000,11025,12000,16000,22050,24000,32000,44100,48000" channelMasks="AUDIO_CHANNEL_IN_MONO,AUDIO_CHANNEL_IN_STEREO,AUDIO_CHANNEL_IN_FRONT_BACK"/> </devicePort> <devicePort tagName="In Call-Voice" type="AUDIO_DEVICE_IN_VOICE_CALL" role="source"> <profile name="" format="AUDIO_FORMAT_PCM_16_BIT,AUDIO_FORMAT_AMR_NB,AUDIO_FORMAT_AMR_WB,AUDIO_FORMAT_QCELP, AUDIO_FORMAT_EVRC,AUDIO_FORMAT_EVRCB,AUDIO_FORMAT_EVRCWB,AUDIO_FORMAT_EVRCNW" samplingRates="8000,11025,12000,16000,22050,24000,32000,44100,48000" channelMasks="AUDIO_CHANNEL_IN_MONO,AUDIO_CHANNEL_IN_STEREO,AUDIO_CHANNEL_IN_FRONT_BACK"/> </devicePort> <devicePort tagName="FM Tuner" type="AUDIO_DEVICE_IN_FM_TUNER" role="source"> <profile name="" format="AUDIO_FORMAT_PCM_16_BIT" samplingRates="48000" channelMasks="AUDIO_CHANNEL_IN_MONO,AUDIO_CHANNEL_IN_STEREO"/> </devicePort> <devicePort tagName="Wired Headset Mic" type="AUDIO_DEVICE_IN_WIRED_HEADSET" role="source"> <profile name="" format="AUDIO_FORMAT_PCM_16_BIT" samplingRates="8000,11025,12000,16000,22050,24000,32000,44100,48000" channelMasks="AUDIO_CHANNEL_IN_MONO,AUDIO_CHANNEL_IN_STEREO,AUDIO_CHANNEL_IN_FRONT_BACK"/> </devicePort> <devicePort tagName="BT SCO Headset Mic" type="AUDIO_DEVICE_IN_BLUETOOTH_SCO_HEADSET" role="source"> <profile name="" format="AUDIO_FORMAT_PCM_16_BIT" samplingRates="8000,16000" channelMasks="AUDIO_CHANNEL_IN_MONO"/> </devicePort> </devicePorts> <!-- route declaration, i.e. list all available sources for a given sink --> <routes> <route type="mix" sink="Earpiece" sources="primary output,low_latency,compressed_offload,voip_rx,BT SCO Headset Mic"/> <route type="mix" sink="Speaker" sources="primary output,low_latency,compressed_offload,voip_rx,BT SCO Headset Mic"/> <route type="mix" sink="Wired Headset" sources="primary output,low_latency,compressed_offload,voip_rx,BT SCO Headset Mic"/> <route type="mix" sink="Wired Headphones" sources="primary output,low_latency,compressed_offload,voip_rx,BT SCO Headset Mic"/> <route type="mix" sink="Line" sources="primary output,low_latency,compressed_offload,voip_rx"/> <route type="mix" sink="Proxy" sources="primary output,low_latency,compressed_offload"/> <route type="mix" sink="FM" sources="primary output"/> <route type="mix" sink="BT SCO All" sources="primary output,low_latency,compressed_offload,voip_rx"/> <route type="mix" sink="primary input" sources="Built-In Mic,Wired Headset Mic,BT SCO Headset Mic,Built-In Back Mic, FM Tuner,In Call-Voice"/> </routes> </module></modules>Primary模块支持的输出设备按位与0x212007F
AUDIO_DEVICE_OUT_EARPIECE = 0x1, AUDIO_DEVICE_OUT_SPEAKER = 0x2, AUDIO_DEVICE_OUT_WIRED_HEADSET = 0x4, AUDIO_DEVICE_OUT_WIRED_HEADPHONE = 0x8, AUDIO_DEVICE_OUT_BLUETOOTH_SCO = 0x10, AUDIO_DEVICE_OUT_BLUETOOTH_SCO_HEADSET = 0x20, AUDIO_DEVICE_OUT_BLUETOOTH_SCO_CARKIT = 0x40, AUDIO_DEVICE_OUT_ALL_SCO = 0x70 AUDIO_DEVICE_OUT_LINE = 0x20000, AUDIO_DEVICE_OUT_FM = 0x100000, AUDIO_DEVICE_OUT_PROXY = 0x2000000,Primary模块支持的输入设备按位与0x800020DC
AUDIO_DEVICE_BIT_IN = 0x80000000, AUDIO_DEVICE_IN_BUILTIN_MIC = AUDIO_DEVICE_BIT_IN | 0x4, AUDIO_DEVICE_IN_BLUETOOTH_SCO_HEADSET = AUDIO_DEVICE_BIT_IN | 0x8, AUDIO_DEVICE_IN_WIRED_HEADSET = AUDIO_DEVICE_BIT_IN | 0x10, AUDIO_DEVICE_IN_VOICE_CALL = AUDIO_DEVICE_BIT_IN | 0x40, AUDIO_DEVICE_IN_BACK_MIC = AUDIO_DEVICE_BIT_IN | 0x80, AUDIO_DEVICE_IN_FM_TUNER = AUDIO_DEVICE_BIT_IN | 0x2000,默认模块
HW module primary, output profiles 4, input profiles 1
output devices 0x212007f, name primary output, avaiable 0x3 //支持所有输出设备
output devices 0x202007f, name low_latency, avaiable 0x3 //不支持AUDIO_DEVICE_OUT_FM
output devices 0x202007f, name compressed_offload, avaiable 0x3 //不支持AUDIO_DEVICE_OUT_FM
output devices 0x2007f, name voip_rx, avaiable 0x3 //不支持AUDIO_DEVICE_OUT_PROXY和AUDIO_DEVICE_OUT_FM
input devices 0x800020dc, name primary input, availabe 0x21c4 //支持所有输入设备
每个profile是否支持某种设备取决于两个方面：
一是必须有定义该设备的devicePort声明；
二是必须有该mixPort到devicePort的路由；
如name为low_latency的profile不支持设备AUDIO_DEVICE_OUT_FM，其原因是因为没有low_latency到AUDIO_DEVICE_OUT_FM的路由，系统只有primary output到AUDIO_DEVICE_OUT_FM的路由。
//定义输出流<mixPort name="primary output" role="source" flags="AUDIO_OUTPUT_FLAG_PRIMARY"><profile name="" format="AUDIO_FORMAT_PCM_16_BIT" samplingRates="48000" channelMasks="AUDIO_CHANNEL_OUT_STEREO"/></mixPort>//定义输出设备<devicePort tagName="FM" type="AUDIO_DEVICE_OUT_FM" role="sink"><profile name="" format="AUDIO_FORMAT_PCM_16_BIT" samplingRates="48000" channelMasks="AUDIO_CHANNEL_OUT_MONO,AUDIO_CHANNEL_OUT_STEREO"/></devicePort>//定义输出流的输出设备的路由<route type="mix" sink="FM" sources="primary output"/>蓝牙模块
HW module a2dp, output profiles 1, input profiles 1
output devices 0x380, name a2dp output, avaiable 0x3
input devices 0x80020000, name a2dp input, availabe 0x21c4
USB模块
HW module usb, output profiles 2, input profiles 1
output devices 0x2000, name usb_accessory output, avaiable 0x3
output devices 0x4000, name usb_device output, avaiable 0x3
input devices 0x80001000, name usb_device input, availabe 0x21c4
通过audio_policy_configuration.xml文件初始化输入输出系统。
AudioPolicyManager::AudioPolicyManager(AudioPolicyClientInterface *clientInterface){ mUidCached = getuid(); mpClientInterface = clientInterface; bool speakerDrcEnabled = false; mVolumeCurves = new VolumeCurvesCollection(); AudioPolicyConfig config(mHwModules, mAvailableOutputDevices, mAvailableInputDevices, mDefaultOutputDevice, speakerDrcEnabled, static_cast<VolumeCurvesCollection *>(mVolumeCurves)); PolicySerializer serializer; if (serializer.deserialize(AUDIO_POLICY_XML_CONFIG_FILE, config) != NO_ERROR) { ALOGE("could not load audio policy configuration file, setting defaults"); config.setDefault(); } // must be done after reading the policy (since conditionned by Speaker Drc Enabling) mVolumeCurves->initializeVolumeCurves(speakerDrcEnabled); // Once policy config has been parsed, retrieve an instance of the engine and initialize it. audio_policy::EngineInstance *engineInstance = audio_policy::EngineInstance::getInstance(); // Retrieve the Policy Manager Interface mEngine = engineInstance->queryInterface<AudioPolicyManagerInterface>(); mEngine->setObserver(this); status_t status = mEngine->initCheck(); (void) status; audio_devices_t outputDeviceTypes = mAvailableOutputDevices.types(); audio_devices_t inputDeviceTypes = mAvailableInputDevices.types() & ~AUDIO_DEVICE_BIT_IN; // 依次加载 HwModule 并打开其所含 profile 的 outputStream 及 inputStream for (size_t i = 0; i < mHwModules.size(); i++) { mHwModules[i]->mHandle = mpClientInterface->loadHwModule(mHwModules[i]->getName()); if (mHwModules[i]->mHandle == 0) { ALOGW("could not open HW module %s", mHwModules[i]->getName()); continue; } //打开所有可用的输出设备 for (size_t j = 0; j < mHwModules[i]->mOutputProfiles.size(); j++) { const sp<IOProfile> outProfile = mHwModules[i]->mOutputProfiles[j]; if (!outProfile->hasSupportedDevices()) { ALOGW("Output profile contains no device on module %s", mHwModules[i]->getName()); continue; } if ((outProfile->getFlags() & AUDIO_OUTPUT_FLAG_TTS) != 0) { mTtsOutputAvailable = true; } //不打开direct类型的输出设备 if ((outProfile->getFlags() & AUDIO_OUTPUT_FLAG_DIRECT) != 0) { continue; } audio_devices_t profileType = outProfile->getSupportedDevicesType(); if ((profileType & mDefaultOutputDevice->type()) != AUDIO_DEVICE_NONE) { //使用默认输出设备speaker profileType = mDefaultOutputDevice->type(); } else { //返回第一个匹配的设备 profileType = outProfile->getSupportedDeviceForType(outputDeviceTypes); } if ((profileType & outputDeviceTypes) == 0) { continue; } sp<SwAudioOutputDescriptor> outputDesc = new SwAudioOutputDescriptor(outProfile, mpClientInterface); const DeviceVector &supportedDevices = outProfile->getSupportedDevices(); const DeviceVector &devicesForType = supportedDevices.getDevicesFromType(profileType); String8 address = devicesForType.size() > 0 ? devicesForType.itemAt(0)->mAddress : String8(""); outputDesc->mDevice = profileType; audio_config_t config = AUDIO_CONFIG_INITIALIZER; config.sample_rate = outputDesc->mSamplingRate; config.channel_mask = outputDesc->mChannelMask; config.format = outputDesc->mFormat; audio_io_handle_t output = AUDIO_IO_HANDLE_NONE; status_t status = mpClientInterface->openOutput(outProfile->getModuleHandle(), &output, &config, &outputDesc->mDevice, address, &outputDesc->mLatency, outputDesc->mFlags); if (status != NO_ERROR) { ALOGW("Cannot open output stream for device %08x on hw module %s", outputDesc->mDevice, mHwModules[i]->getName()); } else { outputDesc->mSamplingRate = config.sample_rate; outputDesc->mChannelMask = config.channel_mask; outputDesc->mFormat = config.format; for (size_t k = 0; k < supportedDevices.size(); k++) { ssize_t index = mAvailableOutputDevices.indexOf(supportedDevices[k]); // give a valid ID to an attached device once confirmed it is reachable if (index >= 0 && !mAvailableOutputDevices[index]->isAttached()) { mAvailableOutputDevices[index]->attach(mHwModules[i]); } } if (mPrimaryOutput == 0 && outProfile->getFlags() & AUDIO_OUTPUT_FLAG_PRIMARY) { mPrimaryOutput = outputDesc; } addOutput(output, outputDesc); setOutputDevice(outputDesc, outputDesc->mDevice, true, 0, NULL, address.string()); } } //打开所有可用的输入设备 for (size_t j = 0; j < mHwModules[i]->mInputProfiles.size(); j++) { const sp<IOProfile> inProfile = mHwModules[i]->mInputProfiles[j]; if (!inProfile->hasSupportedDevices()) { ALOGW("Input profile contains no device on module %s", mHwModules[i]->getName()); continue; } //返回第一个匹配的输入设备 audio_devices_t profileType = inProfile->getSupportedDeviceForType(inputDeviceTypes); if ((profileType & inputDeviceTypes) == 0) { continue; } sp<AudioInputDescriptor> inputDesc = new AudioInputDescriptor(inProfile); inputDesc->mDevice = profileType; // find the address DeviceVector inputDevices = mAvailableInputDevices.getDevicesFromType(profileType); // the inputs vector must be of size 1, but we don't want to crash here String8 address = inputDevices.size() > 0 ? inputDevices.itemAt(0)->mAddress : String8(""); audio_config_t config = AUDIO_CONFIG_INITIALIZER; config.sample_rate = inputDesc->mSamplingRate; config.channel_mask = inputDesc->mChannelMask; config.format = inputDesc->mFormat; audio_io_handle_t input = AUDIO_IO_HANDLE_NONE; status_t status = mpClientInterface->openInput(inProfile->getModuleHandle(), &input, &config, &inputDesc->mDevice, address, AUDIO_SOURCE_MIC, AUDIO_INPUT_FLAG_NONE); if (status == NO_ERROR) { const DeviceVector &supportedDevices = inProfile->getSupportedDevices(); for (size_t k = 0; k < supportedDevices.size(); k++) { ssize_t index = mAvailableInputDevices.indexOf(supportedDevices[k]); // give a valid ID to an attached device once confirmed it is reachable if (index >= 0) { sp<DeviceDescriptor> devDesc = mAvailableInputDevices[index]; if (!devDesc->isAttached()) { devDesc->attach(mHwModules[i]); devDesc->importAudioPort(inProfile); } } } mpClientInterface->closeInput(input); } else { ALOGW("Cannot open input stream for device %08x on hw module %s", inputDesc->mDevice, mHwModules[i]->getName()); } } } // make sure all attached devices have been allocated a unique ID for (size_t i = 0; i < mAvailableOutputDevices.size();) { if (!mAvailableOutputDevices[i]->isAttached()) { ALOGW("Output device %08x unreachable", mAvailableOutputDevices[i]->type()); mAvailableOutputDevices.remove(mAvailableOutputDevices[i]); continue; } // The device is now validated and can be appended to the available devices of the engine mEngine->setDeviceConnectionState(mAvailableOutputDevices[i], AUDIO_POLICY_DEVICE_STATE_AVAILABLE); i++; } for (size_t i = 0; i < mAvailableInputDevices.size();) { if (!mAvailableInputDevices[i]->isAttached()) { ALOGW("Input device %08x unreachable", mAvailableInputDevices[i]->type()); mAvailableInputDevices.remove(mAvailableInputDevices[i]); continue; } // The device is now validated and can be appended to the available devices of the engine mEngine->setDeviceConnectionState(mAvailableInputDevices[i], AUDIO_POLICY_DEVICE_STATE_AVAILABLE); i++; } // make sure default device is reachable if (mDefaultOutputDevice == 0 || mAvailableOutputDevices.indexOf(mDefaultOutputDevice) < 0) { ALOGE("Default device %08x is unreachable", mDefaultOutputDevice->type()); } updateDevicesAndOutputs();}阅读全文
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