| /* |
| * Copyright (C) 2014 The Android Open Source Project |
| * |
| * Licensed under the Apache License, Version 2.0 (the "License"); |
| * you may not use this file except in compliance with the License. |
| * You may obtain a copy of the License at |
| * |
| * http://www.apache.org/licenses/LICENSE-2.0 |
| * |
| * Unless required by applicable law or agreed to in writing, software |
| * distributed under the License is distributed on an "AS IS" BASIS, |
| * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. |
| * See the License for the specific language governing permissions an |
| * limitations under the License. |
| */ |
| |
| package com.android.server.usb; |
| |
| import android.content.Context; |
| import android.content.pm.PackageManager; |
| import android.content.res.Resources; |
| import android.hardware.usb.UsbConstants; |
| import android.hardware.usb.UsbDevice; |
| import android.hardware.usb.UsbInterface; |
| import android.media.AudioSystem; |
| import android.media.IAudioService; |
| import android.media.midi.MidiDeviceInfo; |
| import android.os.Bundle; |
| import android.os.FileObserver; |
| import android.os.RemoteException; |
| import android.os.ServiceManager; |
| import android.os.SystemClock; |
| import android.provider.Settings; |
| import android.util.Slog; |
| |
| import com.android.internal.alsa.AlsaCardsParser; |
| import com.android.internal.alsa.AlsaDevicesParser; |
| import com.android.internal.util.IndentingPrintWriter; |
| import com.android.server.audio.AudioService; |
| |
| import libcore.io.IoUtils; |
| |
| import java.io.File; |
| import java.util.HashMap; |
| |
| /** |
| * UsbAlsaManager manages USB audio and MIDI devices. |
| */ |
| public final class UsbAlsaManager { |
| private static final String TAG = UsbAlsaManager.class.getSimpleName(); |
| private static final boolean DEBUG = false; |
| |
| private static final String ALSA_DIRECTORY = "/dev/snd/"; |
| |
| private final Context mContext; |
| private IAudioService mAudioService; |
| private final boolean mHasMidiFeature; |
| |
| private final AlsaCardsParser mCardsParser = new AlsaCardsParser(); |
| private final AlsaDevicesParser mDevicesParser = new AlsaDevicesParser(); |
| |
| // this is needed to map USB devices to ALSA Audio Devices, especially to remove an |
| // ALSA device when we are notified that its associated USB device has been removed. |
| |
| private final HashMap<UsbDevice,UsbAudioDevice> |
| mAudioDevices = new HashMap<UsbDevice,UsbAudioDevice>(); |
| |
| private final HashMap<UsbDevice,UsbMidiDevice> |
| mMidiDevices = new HashMap<UsbDevice,UsbMidiDevice>(); |
| |
| private final HashMap<String,AlsaDevice> |
| mAlsaDevices = new HashMap<String,AlsaDevice>(); |
| |
| private UsbAudioDevice mAccessoryAudioDevice = null; |
| |
| // UsbMidiDevice for USB peripheral mode (gadget) device |
| private UsbMidiDevice mPeripheralMidiDevice = null; |
| |
| private final class AlsaDevice { |
| public static final int TYPE_UNKNOWN = 0; |
| public static final int TYPE_PLAYBACK = 1; |
| public static final int TYPE_CAPTURE = 2; |
| public static final int TYPE_MIDI = 3; |
| |
| public int mCard; |
| public int mDevice; |
| public int mType; |
| |
| public AlsaDevice(int type, int card, int device) { |
| mType = type; |
| mCard = card; |
| mDevice = device; |
| } |
| |
| public boolean equals(Object obj) { |
| if (! (obj instanceof AlsaDevice)) { |
| return false; |
| } |
| AlsaDevice other = (AlsaDevice)obj; |
| return (mType == other.mType && mCard == other.mCard && mDevice == other.mDevice); |
| } |
| |
| public String toString() { |
| StringBuilder sb = new StringBuilder(); |
| sb.append("AlsaDevice: [card: " + mCard); |
| sb.append(", device: " + mDevice); |
| sb.append(", type: " + mType); |
| sb.append("]"); |
| return sb.toString(); |
| } |
| } |
| |
| private final FileObserver mAlsaObserver = new FileObserver(ALSA_DIRECTORY, |
| FileObserver.CREATE | FileObserver.DELETE) { |
| public void onEvent(int event, String path) { |
| switch (event) { |
| case FileObserver.CREATE: |
| alsaFileAdded(path); |
| break; |
| case FileObserver.DELETE: |
| alsaFileRemoved(path); |
| break; |
| } |
| } |
| }; |
| |
| /* package */ UsbAlsaManager(Context context) { |
| mContext = context; |
| mHasMidiFeature = context.getPackageManager().hasSystemFeature(PackageManager.FEATURE_MIDI); |
| |
| // initial scan |
| mCardsParser.scan(); |
| } |
| |
| public void systemReady() { |
| mAudioService = IAudioService.Stub.asInterface( |
| ServiceManager.getService(Context.AUDIO_SERVICE)); |
| |
| mAlsaObserver.startWatching(); |
| |
| // add existing alsa devices |
| File[] files = new File(ALSA_DIRECTORY).listFiles(); |
| if (files != null) { |
| for (int i = 0; i < files.length; i++) { |
| alsaFileAdded(files[i].getName()); |
| } |
| } |
| } |
| |
| // Notifies AudioService when a device is added or removed |
| // audioDevice - the AudioDevice that was added or removed |
| // enabled - if true, we're connecting a device (it's arrived), else disconnecting |
| private void notifyDeviceState(UsbAudioDevice audioDevice, boolean enabled) { |
| if (DEBUG) { |
| Slog.d(TAG, "notifyDeviceState " + enabled + " " + audioDevice); |
| } |
| |
| if (mAudioService == null) { |
| Slog.e(TAG, "no AudioService"); |
| return; |
| } |
| |
| // FIXME Does not yet handle the case where the setting is changed |
| // after device connection. Ideally we should handle the settings change |
| // in SettingsObserver. Here we should log that a USB device is connected |
| // and disconnected with its address (card , device) and force the |
| // connection or disconnection when the setting changes. |
| int isDisabled = Settings.Secure.getInt(mContext.getContentResolver(), |
| Settings.Secure.USB_AUDIO_AUTOMATIC_ROUTING_DISABLED, 0); |
| if (isDisabled != 0) { |
| return; |
| } |
| |
| int state = (enabled ? 1 : 0); |
| int alsaCard = audioDevice.mCard; |
| int alsaDevice = audioDevice.mDevice; |
| if (alsaCard < 0 || alsaDevice < 0) { |
| Slog.e(TAG, "Invalid alsa card or device alsaCard: " + alsaCard + |
| " alsaDevice: " + alsaDevice); |
| return; |
| } |
| |
| String address = AudioService.makeAlsaAddressString(alsaCard, alsaDevice); |
| try { |
| // Playback Device |
| if (audioDevice.mHasPlayback) { |
| int device = (audioDevice == mAccessoryAudioDevice ? |
| AudioSystem.DEVICE_OUT_USB_ACCESSORY : |
| AudioSystem.DEVICE_OUT_USB_DEVICE); |
| if (DEBUG) { |
| Slog.i(TAG, "pre-call device:0x" + Integer.toHexString(device) + |
| " addr:" + address + " name:" + audioDevice.mDeviceName); |
| } |
| mAudioService.setWiredDeviceConnectionState( |
| device, state, address, audioDevice.mDeviceName, TAG); |
| } |
| |
| // Capture Device |
| if (audioDevice.mHasCapture) { |
| int device = (audioDevice == mAccessoryAudioDevice ? |
| AudioSystem.DEVICE_IN_USB_ACCESSORY : |
| AudioSystem.DEVICE_IN_USB_DEVICE); |
| mAudioService.setWiredDeviceConnectionState( |
| device, state, address, audioDevice.mDeviceName, TAG); |
| } |
| } catch (RemoteException e) { |
| Slog.e(TAG, "RemoteException in setWiredDeviceConnectionState"); |
| } |
| } |
| |
| private AlsaDevice waitForAlsaDevice(int card, int device, int type) { |
| if (DEBUG) { |
| Slog.e(TAG, "waitForAlsaDevice(c:" + card + " d:" + device + ")"); |
| } |
| |
| AlsaDevice testDevice = new AlsaDevice(type, card, device); |
| |
| // This value was empirically determined. |
| final int kWaitTimeMs = 2500; |
| |
| synchronized(mAlsaDevices) { |
| long timeoutMs = SystemClock.elapsedRealtime() + kWaitTimeMs; |
| do { |
| if (mAlsaDevices.values().contains(testDevice)) { |
| return testDevice; |
| } |
| long waitTimeMs = timeoutMs - SystemClock.elapsedRealtime(); |
| if (waitTimeMs > 0) { |
| try { |
| mAlsaDevices.wait(waitTimeMs); |
| } catch (InterruptedException e) { |
| Slog.d(TAG, "usb: InterruptedException while waiting for ALSA file."); |
| } |
| } |
| } while (timeoutMs > SystemClock.elapsedRealtime()); |
| } |
| |
| Slog.e(TAG, "waitForAlsaDevice failed for " + testDevice); |
| return null; |
| } |
| |
| private void alsaFileAdded(String name) { |
| int type = AlsaDevice.TYPE_UNKNOWN; |
| int card = -1, device = -1; |
| |
| if (name.startsWith("pcmC")) { |
| if (name.endsWith("p")) { |
| type = AlsaDevice.TYPE_PLAYBACK; |
| } else if (name.endsWith("c")) { |
| type = AlsaDevice.TYPE_CAPTURE; |
| } |
| } else if (name.startsWith("midiC")) { |
| type = AlsaDevice.TYPE_MIDI; |
| } |
| |
| if (type != AlsaDevice.TYPE_UNKNOWN) { |
| try { |
| int c_index = name.indexOf('C'); |
| int d_index = name.indexOf('D'); |
| int end = name.length(); |
| if (type == AlsaDevice.TYPE_PLAYBACK || type == AlsaDevice.TYPE_CAPTURE) { |
| // skip trailing 'p' or 'c' |
| end--; |
| } |
| card = Integer.parseInt(name.substring(c_index + 1, d_index)); |
| device = Integer.parseInt(name.substring(d_index + 1, end)); |
| } catch (Exception e) { |
| Slog.e(TAG, "Could not parse ALSA file name " + name, e); |
| return; |
| } |
| synchronized(mAlsaDevices) { |
| if (mAlsaDevices.get(name) == null) { |
| AlsaDevice alsaDevice = new AlsaDevice(type, card, device); |
| Slog.d(TAG, "Adding ALSA device " + alsaDevice); |
| mAlsaDevices.put(name, alsaDevice); |
| mAlsaDevices.notifyAll(); |
| } |
| } |
| } |
| } |
| |
| private void alsaFileRemoved(String path) { |
| synchronized(mAlsaDevices) { |
| AlsaDevice device = mAlsaDevices.remove(path); |
| if (device != null) { |
| Slog.d(TAG, "ALSA device removed: " + device); |
| } |
| } |
| } |
| |
| /* |
| * Select the default device of the specified card. |
| */ |
| /* package */ UsbAudioDevice selectAudioCard(int card) { |
| if (DEBUG) { |
| Slog.d(TAG, "selectAudioCard() card:" + card |
| + " isCardUsb(): " + mCardsParser.isCardUsb(card)); |
| } |
| if (!mCardsParser.isCardUsb(card)) { |
| // Don't. AudioPolicyManager has logic for falling back to internal devices. |
| return null; |
| } |
| |
| mDevicesParser.scan(); |
| int device = mDevicesParser.getDefaultDeviceNum(card); |
| |
| boolean hasPlayback = mDevicesParser.hasPlaybackDevices(card); |
| boolean hasCapture = mDevicesParser.hasCaptureDevices(card); |
| if (DEBUG) { |
| Slog.d(TAG, "usb: hasPlayback:" + hasPlayback + " hasCapture:" + hasCapture); |
| } |
| |
| int deviceClass = |
| (mCardsParser.isCardUsb(card) |
| ? UsbAudioDevice.kAudioDeviceClass_External |
| : UsbAudioDevice.kAudioDeviceClass_Internal) | |
| UsbAudioDevice.kAudioDeviceMeta_Alsa; |
| |
| // Playback device file needed/present? |
| if (hasPlayback && (waitForAlsaDevice(card, device, AlsaDevice.TYPE_PLAYBACK) == null)) { |
| return null; |
| } |
| |
| // Capture device file needed/present? |
| if (hasCapture && (waitForAlsaDevice(card, device, AlsaDevice.TYPE_CAPTURE) == null)) { |
| return null; |
| } |
| |
| UsbAudioDevice audioDevice = |
| new UsbAudioDevice(card, device, hasPlayback, hasCapture, deviceClass); |
| AlsaCardsParser.AlsaCardRecord cardRecord = mCardsParser.getCardRecordFor(card); |
| audioDevice.mDeviceName = cardRecord.mCardName; |
| audioDevice.mDeviceDescription = cardRecord.mCardDescription; |
| |
| notifyDeviceState(audioDevice, true); |
| |
| return audioDevice; |
| } |
| |
| /* package */ UsbAudioDevice selectDefaultDevice() { |
| if (DEBUG) { |
| Slog.d(TAG, "UsbAudioManager.selectDefaultDevice()"); |
| } |
| return selectAudioCard(mCardsParser.getDefaultCard()); |
| } |
| |
| /* package */ void usbDeviceAdded(UsbDevice usbDevice) { |
| if (DEBUG) { |
| Slog.d(TAG, "deviceAdded(): " + usbDevice.getManufacturerName() + |
| " nm:" + usbDevice.getProductName()); |
| } |
| |
| // Is there an audio interface in there? |
| boolean isAudioDevice = false; |
| |
| // FIXME - handle multiple configurations? |
| int interfaceCount = usbDevice.getInterfaceCount(); |
| for (int ntrfaceIndex = 0; !isAudioDevice && ntrfaceIndex < interfaceCount; |
| ntrfaceIndex++) { |
| UsbInterface ntrface = usbDevice.getInterface(ntrfaceIndex); |
| if (ntrface.getInterfaceClass() == UsbConstants.USB_CLASS_AUDIO) { |
| isAudioDevice = true; |
| } |
| } |
| |
| if (DEBUG) { |
| Slog.d(TAG, " isAudioDevice: " + isAudioDevice); |
| } |
| if (!isAudioDevice) { |
| return; |
| } |
| |
| int addedCard = mCardsParser.getDefaultUsbCard(); |
| |
| // If the default isn't a USB device, let the existing "select internal mechanism" |
| // handle the selection. |
| if (DEBUG) { |
| Slog.d(TAG, " mCardsParser.isCardUsb(" + addedCard + ") = " |
| + mCardsParser.isCardUsb(addedCard)); |
| } |
| if (mCardsParser.isCardUsb(addedCard)) { |
| UsbAudioDevice audioDevice = selectAudioCard(addedCard); |
| if (audioDevice != null) { |
| mAudioDevices.put(usbDevice, audioDevice); |
| Slog.i(TAG, "USB Audio Device Added: " + audioDevice); |
| } |
| |
| // look for MIDI devices |
| |
| // Don't need to call mDevicesParser.scan() because selectAudioCard() does this above. |
| // Uncomment this next line if that behavior changes in the fugure. |
| // mDevicesParser.scan() |
| |
| boolean hasMidi = mDevicesParser.hasMIDIDevices(addedCard); |
| if (hasMidi && mHasMidiFeature) { |
| int device = mDevicesParser.getDefaultDeviceNum(addedCard); |
| AlsaDevice alsaDevice = waitForAlsaDevice(addedCard, device, AlsaDevice.TYPE_MIDI); |
| if (alsaDevice != null) { |
| Bundle properties = new Bundle(); |
| String manufacturer = usbDevice.getManufacturerName(); |
| String product = usbDevice.getProductName(); |
| String version = usbDevice.getVersion(); |
| String name; |
| if (manufacturer == null || manufacturer.isEmpty()) { |
| name = product; |
| } else if (product == null || product.isEmpty()) { |
| name = manufacturer; |
| } else { |
| name = manufacturer + " " + product; |
| } |
| properties.putString(MidiDeviceInfo.PROPERTY_NAME, name); |
| properties.putString(MidiDeviceInfo.PROPERTY_MANUFACTURER, manufacturer); |
| properties.putString(MidiDeviceInfo.PROPERTY_PRODUCT, product); |
| properties.putString(MidiDeviceInfo.PROPERTY_VERSION, version); |
| properties.putString(MidiDeviceInfo.PROPERTY_SERIAL_NUMBER, |
| usbDevice.getSerialNumber()); |
| properties.putInt(MidiDeviceInfo.PROPERTY_ALSA_CARD, alsaDevice.mCard); |
| properties.putInt(MidiDeviceInfo.PROPERTY_ALSA_DEVICE, alsaDevice.mDevice); |
| properties.putParcelable(MidiDeviceInfo.PROPERTY_USB_DEVICE, usbDevice); |
| |
| UsbMidiDevice usbMidiDevice = UsbMidiDevice.create(mContext, properties, |
| alsaDevice.mCard, alsaDevice.mDevice); |
| if (usbMidiDevice != null) { |
| mMidiDevices.put(usbDevice, usbMidiDevice); |
| } |
| } |
| } |
| } |
| |
| if (DEBUG) { |
| Slog.d(TAG, "deviceAdded() - done"); |
| } |
| } |
| |
| /* package */ void usbDeviceRemoved(UsbDevice usbDevice) { |
| if (DEBUG) { |
| Slog.d(TAG, "deviceRemoved(): " + usbDevice.getManufacturerName() + |
| " " + usbDevice.getProductName()); |
| } |
| |
| UsbAudioDevice audioDevice = mAudioDevices.remove(usbDevice); |
| Slog.i(TAG, "USB Audio Device Removed: " + audioDevice); |
| if (audioDevice != null) { |
| if (audioDevice.mHasPlayback || audioDevice.mHasCapture) { |
| notifyDeviceState(audioDevice, false); |
| |
| // if there any external devices left, select one of them |
| selectDefaultDevice(); |
| } |
| } |
| UsbMidiDevice usbMidiDevice = mMidiDevices.remove(usbDevice); |
| if (usbMidiDevice != null) { |
| IoUtils.closeQuietly(usbMidiDevice); |
| } |
| } |
| |
| /* package */ void setAccessoryAudioState(boolean enabled, int card, int device) { |
| if (DEBUG) { |
| Slog.d(TAG, "setAccessoryAudioState " + enabled + " " + card + " " + device); |
| } |
| if (enabled) { |
| mAccessoryAudioDevice = new UsbAudioDevice(card, device, true, false, |
| UsbAudioDevice.kAudioDeviceClass_External); |
| notifyDeviceState(mAccessoryAudioDevice, true); |
| } else if (mAccessoryAudioDevice != null) { |
| notifyDeviceState(mAccessoryAudioDevice, false); |
| mAccessoryAudioDevice = null; |
| } |
| } |
| |
| /* package */ void setPeripheralMidiState(boolean enabled, int card, int device) { |
| if (!mHasMidiFeature) { |
| return; |
| } |
| |
| if (enabled && mPeripheralMidiDevice == null) { |
| Bundle properties = new Bundle(); |
| Resources r = mContext.getResources(); |
| properties.putString(MidiDeviceInfo.PROPERTY_NAME, r.getString( |
| com.android.internal.R.string.usb_midi_peripheral_name)); |
| properties.putString(MidiDeviceInfo.PROPERTY_MANUFACTURER, r.getString( |
| com.android.internal.R.string.usb_midi_peripheral_manufacturer_name)); |
| properties.putString(MidiDeviceInfo.PROPERTY_PRODUCT, r.getString( |
| com.android.internal.R.string.usb_midi_peripheral_product_name)); |
| properties.putInt(MidiDeviceInfo.PROPERTY_ALSA_CARD, card); |
| properties.putInt(MidiDeviceInfo.PROPERTY_ALSA_DEVICE, device); |
| mPeripheralMidiDevice = UsbMidiDevice.create(mContext, properties, card, device); |
| } else if (!enabled && mPeripheralMidiDevice != null) { |
| IoUtils.closeQuietly(mPeripheralMidiDevice); |
| mPeripheralMidiDevice = null; |
| } |
| } |
| |
| // |
| // Devices List |
| // |
| /* |
| //import java.util.ArrayList; |
| public ArrayList<UsbAudioDevice> getConnectedDevices() { |
| ArrayList<UsbAudioDevice> devices = new ArrayList<UsbAudioDevice>(mAudioDevices.size()); |
| for (HashMap.Entry<UsbDevice,UsbAudioDevice> entry : mAudioDevices.entrySet()) { |
| devices.add(entry.getValue()); |
| } |
| return devices; |
| } |
| */ |
| |
| // |
| // Logging |
| // |
| public void dump(IndentingPrintWriter pw) { |
| pw.println("USB Audio Devices:"); |
| for (UsbDevice device : mAudioDevices.keySet()) { |
| pw.println(" " + device.getDeviceName() + ": " + mAudioDevices.get(device)); |
| } |
| pw.println("USB MIDI Devices:"); |
| for (UsbDevice device : mMidiDevices.keySet()) { |
| pw.println(" " + device.getDeviceName() + ": " + mMidiDevices.get(device)); |
| } |
| } |
| |
| /* |
| public void logDevicesList(String title) { |
| if (DEBUG) { |
| for (HashMap.Entry<UsbDevice,UsbAudioDevice> entry : mAudioDevices.entrySet()) { |
| Slog.i(TAG, "UsbDevice-------------------"); |
| Slog.i(TAG, "" + (entry != null ? entry.getKey() : "[none]")); |
| Slog.i(TAG, "UsbAudioDevice--------------"); |
| Slog.i(TAG, "" + entry.getValue()); |
| } |
| } |
| } |
| */ |
| |
| // This logs a more terse (and more readable) version of the devices list |
| /* |
| public void logDevices(String title) { |
| if (DEBUG) { |
| Slog.i(TAG, title); |
| for (HashMap.Entry<UsbDevice,UsbAudioDevice> entry : mAudioDevices.entrySet()) { |
| Slog.i(TAG, entry.getValue().toShortString()); |
| } |
| } |
| } |
| */ |
| |
| } |
