am fd7d3108: Merge "Implement USB Audio across Nexus Devices Fix issues with... (b755253f) · Commits · e / os / android_frameworks_base

core/java/android/alsa/AlsaDevicesParser.java

+35 −0

Original line number	Diff line number	Diff line
		@@ -205,14 +205,49 @@ public class AlsaDevicesParser {
		return mHasPlaybackDevices;
		}

		public boolean hasPlaybackDevices(int card) {
		for (int index = 0; index < deviceRecords_.size(); index++) {
		AlsaDeviceRecord deviceRecord = deviceRecords_.get(index);
		if (deviceRecord.mCardNum == card &&
		deviceRecord.mDeviceType == AlsaDeviceRecord.kDeviceType_Audio &&
		deviceRecord.mDeviceDir == AlsaDeviceRecord.kDeviceDir_Playback) {
		return true;
		}
		}
		return false;
		}

		public boolean hasCaptureDevices() {
		return mHasCaptureDevices;
		}

		public boolean hasCaptureDevices(int card) {
		for (int index = 0; index < deviceRecords_.size(); index++) {
		AlsaDeviceRecord deviceRecord = deviceRecords_.get(index);
		if (deviceRecord.mCardNum == card &&
		deviceRecord.mDeviceType == AlsaDeviceRecord.kDeviceType_Audio &&
		deviceRecord.mDeviceDir == AlsaDeviceRecord.kDeviceDir_Capture) {
		return true;
		}
		}
		return false;
		}

		public boolean hasMIDIDevices() {
		return mHasMIDIDevices;
		}

		public boolean hasMIDIDevices(int card) {
		for (int index = 0; index < deviceRecords_.size(); index++) {
		AlsaDeviceRecord deviceRecord = deviceRecords_.get(index);
		if (deviceRecord.mCardNum == card &&
		deviceRecord.mDeviceType == AlsaDeviceRecord.kDeviceType_MIDI) {
		return true;
		}
		}
		return false;
		}

		public void scan() {
		deviceRecords_.clear();

media/java/android/media/AudioService.java

+22 −14

Original line number	Diff line number	Diff line
		@@ -4083,8 +4083,19 @@ public class AudioService extends IAudioService.Stub {
		}
		}
		}
		} else if (action.equals(Intent.ACTION_USB_AUDIO_ACCESSORY_PLUG) \|\|
		action.equals(Intent.ACTION_USB_AUDIO_DEVICE_PLUG)) {
		} else if (action.equals(Intent.ACTION_USB_AUDIO_ACCESSORY_PLUG)) {
		state = intent.getIntExtra("state", 0);

		int alsaCard = intent.getIntExtra("card", -1);
		int alsaDevice = intent.getIntExtra("device", -1);

		String params = (alsaCard == -1 && alsaDevice == -1 ? ""
		: "card=" + alsaCard + ";device=" + alsaDevice);

		// Playback Device
		device = AudioSystem.DEVICE_OUT_USB_ACCESSORY;
		setWiredDeviceConnectionState(device, state, params);
		} else if (action.equals(Intent.ACTION_USB_AUDIO_DEVICE_PLUG)) {
		state = intent.getIntExtra("state", 0);

		int alsaCard = intent.getIntExtra("card", -1);
		@@ -4096,21 +4107,18 @@ public class AudioService extends IAudioService.Stub {
		String params = (alsaCard == -1 && alsaDevice == -1 ? ""
		: "card=" + alsaCard + ";device=" + alsaDevice);

		//TODO(pmclean) - Ignore for now the hasPlayback & hasCapture flags since we
		// still need to call setWiredDeviceConnectionState() on disconnect (when we
		// don't have card/device files to parse for this info). We will need to store
		// that info here when we get smarter about multiple USB card/devices.
		// Playback Device
		device = action.equals(Intent.ACTION_USB_AUDIO_ACCESSORY_PLUG) ?
		AudioSystem.DEVICE_OUT_USB_ACCESSORY : AudioSystem.DEVICE_OUT_USB_DEVICE;
		if (hasPlayback) {
		device = AudioSystem.DEVICE_OUT_USB_DEVICE;
		setWiredDeviceConnectionState(device, state, params);
		}

		// Capture Device
		device = action.equals(Intent.ACTION_USB_AUDIO_ACCESSORY_PLUG) ?
		AudioSystem.DEVICE_IN_USB_ACCESSORY : AudioSystem.DEVICE_IN_USB_DEVICE;
		if (hasCapture) {
		device = AudioSystem.DEVICE_IN_USB_DEVICE;
		setWiredDeviceConnectionState(device, state, params);
		}
		else if (action.equals(BluetoothHeadset.ACTION_AUDIO_STATE_CHANGED)) {
		} else if (action.equals(BluetoothHeadset.ACTION_AUDIO_STATE_CHANGED)) {
		boolean broadcast = false;
		int scoAudioState = AudioManager.SCO_AUDIO_STATE_ERROR;
		synchronized (mScoClients) {

services/usb/java/com/android/server/usb/UsbHostManager.java

+128 −69

Original line number	Diff line number	Diff line
		@@ -29,6 +29,8 @@ import android.os.Parcelable;
		import android.os.UserHandle;
		import android.util.Slog;

		import com.android.alsascan.AlsaCardsParser;
		import com.android.alsascan.AlsaDevicesParser;
		import com.android.internal.annotations.GuardedBy;

		import java.io.File;
		@@ -37,7 +39,6 @@ import java.io.FileNotFoundException;
		import java.io.PrintWriter;
		import java.util.ArrayList;
		import java.util.HashMap;
		import java.util.Scanner;

		/**
		* UsbHostManager manages USB state in host mode.
		@@ -62,6 +63,15 @@ public class UsbHostManager {
		private ArrayList<UsbInterface> mNewInterfaces;
		private ArrayList<UsbEndpoint> mNewEndpoints;

		// Attributes of any connected USB audio device.
		//TODO(pmclean) When we extend to multiple, USB Audio devices, we will need to get
		// more clever about this.
		private int mConnectedUsbCard = -1;
		private int mConnectedUsbDeviceNum = -1;
		private boolean mConnectedHasPlayback = false;
		private boolean mConnectedHasCapture = false;
		private boolean mConnectedHasMIDI = false;

		@GuardedBy("mLock")
		private UsbSettingsManager mCurrentSettings;

		@@ -126,9 +136,27 @@ public class UsbHostManager {
		mContext.sendStickyBroadcastAsUser(intent, UserHandle.ALL);
		}

		static boolean isBuiltInUsbDevice(String deviceName) {
		// This may be too broad an assumption
		return deviceName.equals("/dev/bus/usb/001/001");
		private boolean waitForAlsaFile(int card, int device, boolean capture) {
		// These values were empirically determined.
		final int kNumRetries = 5;
		final int kSleepTime = 500; // ms
		String alsaDevPath = "/dev/snd/pcmC" + card + "D" + device + (capture ? "c" : "p");
		File alsaDevFile = new File(alsaDevPath);
		boolean exists = false;
		for (int retry = 0; !exists && retry < kNumRetries; retry++) {
		exists = alsaDevFile.exists();
		if (!exists) {
		try {
		Thread.sleep(kSleepTime);
		} catch (IllegalThreadStateException ex) {
		Slog.d(TAG, "usb: IllegalThreadStateException while waiting for ALSA file.");
		} catch (java.lang.InterruptedException ex) {
		Slog.d(TAG, "usb: InterruptedException while waiting for ALSA file.");
		}
		}
		}

		return exists;
		}

		/* Called from JNI in monitorUsbHostBus() to report new USB devices
		@@ -151,47 +179,13 @@ public class UsbHostManager {
		// midi streaming: 0x03

		// some useful debugging info
		Slog.d(TAG, "usb:UsbHostManager.usbDeviceAdded()");
		Slog.d(TAG, "usb: nm:" + deviceName +
		" vnd:" + vendorID +
		" prd:" + productID +
		" cls:" + deviceClass +
		" sub:" + deviceSubclass +
		" proto:" + deviceProtocol);
		}

		if (!isBuiltInUsbDevice(deviceName)) {
		//TODO(pmclean) we will need this when we need to support USB interfaces
		// beyond card1, device0 but turn them off for now
		//com.android.alsascan.AlsaCardsParser cardsParser =
		// new com.android.alsascan.AlsaCardsParser();
		//cardsParser.scan();
		//cardsParser.Log();

		// But we need to parse the device to determine its capabilities.
		com.android.alsascan.AlsaDevicesParser devicesParser =
		new com.android.alsascan.AlsaDevicesParser();
		devicesParser.scan();
		//devicesParser.Log();

		boolean hasPlaybackDevices = devicesParser.hasPlaybackDevices();
		boolean hasCaptureDevices = devicesParser.hasCaptureDevices();
		boolean hasMIDI = devicesParser.hasMIDIDevices();

		if (DEBUG_AUDIO) {
		Slog.d(TAG, "usb: hasPlayback:" + hasPlaybackDevices
		+ " hasCapture:" + hasCaptureDevices);
		Slog.d(TAG, "usb: nm:" + deviceName + " vnd:" + vendorID + " prd:" + productID + " cls:"
		+ deviceClass + " sub:" + deviceSubclass + " proto:" + deviceProtocol);
		}

		//TODO(pmclean)
		// For now just assume that any USB device that is attached is:
		// 1. An audio interface and
		// 2. is card:1 device:0
		int cardNum = 1;
		int deviceNum = 0;
		sendDeviceNotification(cardNum, deviceNum, true,
		hasPlaybackDevices, hasCaptureDevices, hasMIDI);
		}
		// OK this is non-obvious, but true. One can't tell if the device being attached is even
		// potentially an audio device without parsing the interface descriptors, so punt on any
		// such test until endUsbDeviceAdded() when we have that info.

		if (isBlackListed(deviceName) \|\|
		isBlackListed(deviceClass, deviceSubclass, deviceProtocol)) {
		@@ -217,6 +211,7 @@ public class UsbHostManager {
		mNewInterfaces = new ArrayList<UsbInterface>();
		mNewEndpoints = new ArrayList<UsbEndpoint>();
		}

		return true;
		}

		@@ -270,6 +265,17 @@ public class UsbHostManager {
		mNewInterfaces.toArray(new UsbInterface[mNewInterfaces.size()]));
		}

		// Is there an audio interface in there?
		final int kUsbClassId_Audio = 0x01;
		boolean isAudioDevice = false;
		for (int ntrfaceIndex = 0; !isAudioDevice && ntrfaceIndex < mNewInterfaces.size();
		ntrfaceIndex++) {
		UsbInterface ntrface = mNewInterfaces.get(ntrfaceIndex);
		if (ntrface.getInterfaceClass() == kUsbClassId_Audio) {
		isAudioDevice = true;
		}
		}

		synchronized (mLock) {
		if (mNewDevice != null) {
		mNewDevice.setConfigurations(
		@@ -285,6 +291,48 @@ public class UsbHostManager {
		mNewInterfaces = null;
		mNewEndpoints = null;
		}

		if (!isAudioDevice) {
		return; // bail
		}

		//TODO(pmclean) The "Parser" objects inspect files in "/proc/asound" which we presume is
		// present, unlike the waitForAlsaFile() which waits on a file in /dev/snd. It is not
		// clear why this works, or that it can be relied on going forward. Needs further
		// research.
		AlsaCardsParser cardsParser = new AlsaCardsParser();
		cardsParser.scan();
		// cardsParser.Log();

		// But we need to parse the device to determine its capabilities.
		AlsaDevicesParser devicesParser = new AlsaDevicesParser();
		devicesParser.scan();
		// devicesParser.Log();

		// The protocol for now will be to select the last-connected (highest-numbered)
		// Alsa Card.
		mConnectedUsbCard = cardsParser.getNumCardRecords() - 1;
		mConnectedUsbDeviceNum = 0;

		if (!waitForAlsaFile(mConnectedUsbCard, mConnectedUsbDeviceNum, false)) {
		return;
		}

		mConnectedHasPlayback = devicesParser.hasPlaybackDevices(mConnectedUsbCard);
		mConnectedHasCapture = devicesParser.hasCaptureDevices(mConnectedUsbCard);
		mConnectedHasMIDI = devicesParser.hasMIDIDevices(mConnectedUsbCard);

		if (DEBUG_AUDIO) {
		Slog.d(TAG,
		"usb: hasPlayback:" + mConnectedHasPlayback + " hasCapture:" + mConnectedHasCapture);
		}

		sendDeviceNotification(mConnectedUsbCard,
		mConnectedUsbDeviceNum,
		true,
		mConnectedHasPlayback,
		mConnectedHasCapture,
		mConnectedHasMIDI);
		}

		/* Called from JNI in monitorUsbHostBus to report USB device removal */
		@@ -293,8 +341,19 @@ public class UsbHostManager {
		Slog.d(TAG, "usb:UsbHostManager.usbDeviceRemoved() nm:" + deviceName);
		}

		// Same assumptions as the fake-out above
		sendDeviceNotification(1, 0, false, /NA/false, /NA/false, /NA/false);
		if (mConnectedUsbCard != -1 && mConnectedUsbDeviceNum != -1) {
		sendDeviceNotification(mConnectedUsbCard,
		mConnectedUsbDeviceNum,
		false,
		mConnectedHasPlayback,
		mConnectedHasCapture,
		mConnectedHasMIDI);
		mConnectedUsbCard = -1;
		mConnectedUsbDeviceNum = -1;
		mConnectedHasPlayback = false;
		mConnectedHasCapture = false;
		mConnectedHasMIDI = false;
		}

		synchronized (mLock) {
		UsbDevice device = mDevices.remove(deviceName);