1.1 Audio Framework架构 1.2 车载音频路由架构 1.3 音频数据传输路径 2 属性定义 2.1 AudioAttribute 2.2 DeviceType 3.关键组件 3.1 AudioPolicy 3.2 AudioFlinger 3.3 AudioTrack 4 播放模式 4.1 Deep buffer playback 4.2 Low latency playback 4.3 Compressed offload playback 5 低延迟音频 5.1 AAudio 5.2 OpenSL...
在改变默认输出设备之前,我们需要检查当前可用的音频输出设备。 // 获取可用的音频输出设备AudioDeviceInfo[]devices=audioManager.getDevices(AudioManager.GET_DEVICES_OUTPUTS);for(AudioDeviceInfodevice:devices){Log.i("AudioDevice","Device name: "+device.getProductName()+", Type: "+device.getType()+", A...
根据实际需求,我们可以确定输出的是哪个设备类型。比如,我们要输出到扬声器,可以通过判断设备类型为AudioDeviceInfo.TYPE_BUILTIN_SPEAKER。 inttargetDeviceType=AudioDeviceInfo.TYPE_BUILTIN_SPEAKER;AudioDeviceInfotargetDevice=null;for(AudioDeviceInfodevice:audioDevices){if(device.getType()==targetDeviceType){targe...
public enum AudioDeviceTypeInheritance Enum AudioDeviceType FieldsРазвернутьтаблицу AuxLine 19 BleBroadcast 30 BleHeadset 26 BleSpeaker 27 BluetoothA2dp 8 BluetoothSco 7 BuiltinEarpiece 1 BuiltinMic 15 BuiltinSpeaker 2 BuiltinSpeakerSafe 24 Bus 21 Dock 13 ...
Use Android.Media.AudioDeviceType enum directly instead of this field. A device type describing the Enhanced Audio Return Channel of an HDMI connection. [Android.Runtime.Register("TYPE_HDMI_EARC", ApiSince=31)] [System.Obsolete("This constant will be removed in the future version. Use Android...
A device type describing a Bluetooth Low Energy (BLE) audio speaker. [Android.Runtime.Register("TYPE_BLE_SPEAKER", ApiSince=31)] [System.Obsolete("This constant will be removed in the future version. Use Android.Media.AudioDeviceType enum directly instead of this field.", true)] public con...
device = AUDIO_DEVICE_IN_USB_DEVICE; } else if (availableDeviceTypes & AUDIO_DEVICE_IN_BUILTIN_MIC) { device = AUDIO_DEVICE_IN_BUILTIN_MIC; } PS:通过dumpsys media.audio_policy指令查看当前系统所支持的设备模块及类型。 可通过\android-8.0.0_r4\frameworks\av\services\audiopolicy目录里面 audio...
chip =snd_usb_audio_probe(interface_to_usbdev(intf), intf, id); if (chip) { usb_set_intfdata(intf, chip); return 0; } else return -EIO; } snd_usb_audio_probe()函数会调用snd_usb_create_quirk() static struct snd_usb_audio *snd_usb_audio_probe(struct usb_device *dev,struct usb...
安卓系统的USB audio 方法/步骤 1 USB Headset插上去后，声音要从本地CODEC切换到USB Headset输出/输入。 上网搜了有关USB Audio Hotplug的东西，比较适用的资源如下:1、Hotplugging USB audio devices (Howto) 题目看起来很吻合我们的问题，事实上并没有多少参考价值。其中脚本 /etc/hotplug/usb/extigy或许可以...
audio_channel_mask_t *pChannelMask, uint32_t *pLatencyMs, audio_output_flags_t flags) { /*入参中的module是由前面的loadHwModule 获得的,它是一个audiointerface的id号,可以通过此id在mAudioHwDevs中查找到对应的AudioHwDevice对象*/ status_t status; ...