Merge "Use ALSA for USB MIDI 1.0 devices" into tm-qpr-dev

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

@@ -36,6 +36,7 @@ import libcore.io.IoUtils;
 
 import java.util.ArrayList;
 import java.util.Arrays;
+import java.util.HashMap;
 import java.util.List;
 
 /**
@@ -106,6 +107,12 @@ public final class UsbAlsaManager {
         return false;
     }
 
+    /**
+     * List of connected MIDI devices
+     */
+    private final HashMap<String, UsbMidiDevice>
+            mMidiDevices = new HashMap<String, UsbMidiDevice>();
+
     // UsbMidiDevice for USB peripheral mode (gadget) device
     private UsbMidiDevice mPeripheralMidiDevice = null;
 
@@ -249,6 +256,8 @@ public final class UsbAlsaManager {
             }
         }
 
+        addMidiDevice(deviceAddress, usbDevice, parser, cardRec);
+
         logDevices("deviceAdded()");
 
         if (DEBUG) {
@@ -256,6 +265,54 @@ public final class UsbAlsaManager {
         }
     }
 
+    private void addMidiDevice(String deviceAddress, UsbDevice usbDevice,
+            UsbDescriptorParser parser, AlsaCardsParser.AlsaCardRecord cardRec) {
+        boolean hasMidi = parser.hasMIDIInterface();
+        // UsbHostManager will create UsbDirectMidiDevices instead if MIDI 2 is supported.
+        boolean hasMidi2 = parser.containsUniversalMidiDeviceEndpoint();
+        if (DEBUG) {
+            Slog.d(TAG, "hasMidi: " + hasMidi + " mHasMidiFeature:" + mHasMidiFeature);
+            Slog.d(TAG, "hasMidi2: " + hasMidi2);
+        }
+        if (mHasMidiFeature && hasMidi && !hasMidi2) {
+            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, cardRec.getCardNum());
+            properties.putInt(MidiDeviceInfo.PROPERTY_ALSA_DEVICE, 0 /*deviceNum*/);
+            properties.putParcelable(MidiDeviceInfo.PROPERTY_USB_DEVICE, usbDevice);
+
+            int numLegacyMidiInputs = parser.calculateNumLegacyMidiInputs();
+            int numLegacyMidiOutputs = parser.calculateNumLegacyMidiOutputs();
+            if (DEBUG) {
+                Slog.d(TAG, "numLegacyMidiInputs: " + numLegacyMidiInputs);
+                Slog.d(TAG, "numLegacyMidiOutputs:" + numLegacyMidiOutputs);
+            }
+
+            UsbMidiDevice usbMidiDevice = UsbMidiDevice.create(mContext, properties,
+                    cardRec.getCardNum(), 0 /*device*/, numLegacyMidiInputs,
+                    numLegacyMidiOutputs);
+            if (usbMidiDevice != null) {
+                mMidiDevices.put(deviceAddress, usbMidiDevice);
+            }
+        }
+    }
+
     /* package */ synchronized void usbDeviceRemoved(String deviceAddress/*UsbDevice usbDevice*/) {
         if (DEBUG) {
             Slog.d(TAG, "deviceRemoved(" + deviceAddress + ")");
@@ -269,6 +326,13 @@ public final class UsbAlsaManager {
             selectDefaultDevice(); // if there any external devices left, select one of them
         }
 
+        // MIDI
+        UsbMidiDevice usbMidiDevice = mMidiDevices.remove(deviceAddress);
+        if (usbMidiDevice != null) {
+            Slog.i(TAG, "USB MIDI Device Removed: " + deviceAddress);
+            IoUtils.closeQuietly(usbMidiDevice);
+        }
+
         logDevices("usbDeviceRemoved()");
 
     }
@@ -324,6 +388,12 @@ public final class UsbAlsaManager {
             usbAlsaDevice.dump(dump, "alsa_devices", UsbAlsaManagerProto.ALSA_DEVICES);
         }
 
+        for (String deviceAddr : mMidiDevices.keySet()) {
+            // A UsbMidiDevice does not have a handle to the UsbDevice anymore
+            mMidiDevices.get(deviceAddr).dump(deviceAddr, dump, "midi_devices",
+                    UsbAlsaManagerProto.MIDI_DEVICES);
+        }
+
         dump.end(token);
     }
 

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

@@ -444,9 +444,13 @@ public class UsbHostManager {
                         } else {
                             Slog.e(TAG, "Universal Midi Device is null.");
                         }
-                    }
+
+                        // Use UsbDirectMidiDevice only if this supports MIDI 2.0 as well.
+                        // ALSA removes the audio sound card if MIDI interfaces are removed.
+                        // This means that as long as ALSA is used for audio, MIDI 1.0 USB
+                        // devices should use the ALSA path for MIDI.
                         if (parser.containsLegacyMidiDeviceEndpoint()) {
-                        UsbDirectMidiDevice midiDevice = UsbDirectMidiDevice.create(mContext,
+                            midiDevice = UsbDirectMidiDevice.create(mContext,
                                     newDevice, parser, false, uniqueUsbDeviceIdentifier);
                             if (midiDevice != null) {
                                 midiDevices.add(midiDevice);
@@ -454,6 +458,7 @@ public class UsbHostManager {
                                 Slog.e(TAG, "Legacy Midi Device is null.");
                             }
                         }
+                    }
 
                     if (!midiDevices.isEmpty()) {
                         mMidiDevices.put(deviceAddress, midiDevices);

services/usb/java/com/android/server/usb/descriptors/UsbConfigDescriptor.java

@@ -79,6 +79,10 @@ public final class UsbConfigDescriptor extends UsbDescriptor {
         mInterfaceDescriptors.add(interfaceDesc);
     }
 
+    ArrayList<UsbInterfaceDescriptor> getInterfaceDescriptors() {
+        return mInterfaceDescriptors;
+    }
+
     private boolean isAudioInterface(UsbInterfaceDescriptor descriptor) {
         return descriptor.getUsbClass() == UsbDescriptor.CLASSID_AUDIO
                 && descriptor.getUsbSubclass() == UsbDescriptor.AUDIO_AUDIOSTREAMING;

services/usb/java/com/android/server/usb/descriptors/UsbDescriptorParser.java

@@ -40,6 +40,7 @@ public final class UsbDescriptorParser {
     private UsbDeviceDescriptor mDeviceDescriptor;
     private UsbConfigDescriptor mCurConfigDescriptor;
     private UsbInterfaceDescriptor mCurInterfaceDescriptor;
+    private UsbEndpointDescriptor mCurEndpointDescriptor;
 
     // The AudioClass spec implemented by the AudioClass Interfaces
     // This may well be different than the overall USB Spec.
@@ -165,7 +166,7 @@ public final class UsbDescriptorParser {
                 break;
 
             case UsbDescriptor.DESCRIPTORTYPE_ENDPOINT:
-                descriptor = new UsbEndpointDescriptor(length, type);
+                descriptor = mCurEndpointDescriptor = new UsbEndpointDescriptor(length, type);
                 if (mCurInterfaceDescriptor != null) {
                     mCurInterfaceDescriptor.addEndpointDescriptor(
                             (UsbEndpointDescriptor) descriptor);
@@ -265,6 +266,9 @@ public final class UsbDescriptorParser {
                                     + Integer.toHexString(subClass));
                             break;
                     }
+                    if (mCurEndpointDescriptor != null && descriptor != null) {
+                        mCurEndpointDescriptor.setClassSpecificEndpointDescriptor(descriptor);
+                    }
                 }
                 break;
 
@@ -795,6 +799,84 @@ public final class UsbDescriptorParser {
         return count;
     }
 
+    /**
+     * @hide
+     */
+    private int calculateNumLegacyMidiPorts(boolean isOutput) {
+        // Only look at the first config.
+        UsbConfigDescriptor configDescriptor = null;
+        for (UsbDescriptor descriptor : mDescriptors) {
+            if (descriptor.getType() == UsbDescriptor.DESCRIPTORTYPE_CONFIG) {
+                if (descriptor instanceof UsbConfigDescriptor) {
+                    configDescriptor = (UsbConfigDescriptor) descriptor;
+                    break;
+                } else {
+                    Log.w(TAG, "Unrecognized Config l: " + descriptor.getLength()
+                            + " t:0x" + Integer.toHexString(descriptor.getType()));
+                }
+            }
+        }
+        if (configDescriptor == null) {
+            Log.w(TAG, "Config not found");
+            return 0;
+        }
+
+        ArrayList<UsbInterfaceDescriptor> legacyMidiInterfaceDescriptors =
+                new ArrayList<UsbInterfaceDescriptor>();
+        for (UsbInterfaceDescriptor interfaceDescriptor
+                : configDescriptor.getInterfaceDescriptors()) {
+            if (interfaceDescriptor.getUsbClass() == UsbDescriptor.CLASSID_AUDIO) {
+                if (interfaceDescriptor.getUsbSubclass() == UsbDescriptor.AUDIO_MIDISTREAMING) {
+                    UsbDescriptor midiHeaderDescriptor =
+                            interfaceDescriptor.getMidiHeaderInterfaceDescriptor();
+                    if (midiHeaderDescriptor != null) {
+                        if (midiHeaderDescriptor instanceof UsbMSMidiHeader) {
+                            UsbMSMidiHeader midiHeader =
+                                    (UsbMSMidiHeader) midiHeaderDescriptor;
+                            if (midiHeader.getMidiStreamingClass() == MS_MIDI_1_0) {
+                                legacyMidiInterfaceDescriptors.add(interfaceDescriptor);
+                            }
+                        }
+                    }
+                }
+            }
+        }
+
+        int count = 0;
+        for (UsbInterfaceDescriptor interfaceDescriptor : legacyMidiInterfaceDescriptors) {
+            for (int i = 0; i < interfaceDescriptor.getNumEndpoints(); i++) {
+                UsbEndpointDescriptor endpoint =
+                        interfaceDescriptor.getEndpointDescriptor(i);
+                // 0 is output, 1 << 7 is input.
+                if ((endpoint.getDirection() == 0) == isOutput) {
+                    UsbDescriptor classSpecificEndpointDescriptor =
+                            endpoint.getClassSpecificEndpointDescriptor();
+                    if (classSpecificEndpointDescriptor != null
+                            && (classSpecificEndpointDescriptor instanceof UsbACMidi10Endpoint)) {
+                        UsbACMidi10Endpoint midiEndpoint =
+                                (UsbACMidi10Endpoint) classSpecificEndpointDescriptor;
+                        count += midiEndpoint.getNumJacks();
+                    }
+                }
+            }
+        }
+        return count;
+    }
+
+    /**
+     * @hide
+     */
+    public int calculateNumLegacyMidiInputs() {
+        return calculateNumLegacyMidiPorts(false /*isOutput*/);
+    }
+
+    /**
+     * @hide
+     */
+    public int calculateNumLegacyMidiOutputs() {
+        return calculateNumLegacyMidiPorts(true /*isOutput*/);
+    }
+
     /**
      * @hide
      */

services/usb/java/com/android/server/usb/descriptors/UsbEndpointDescriptor.java

@@ -79,6 +79,8 @@ public class UsbEndpointDescriptor extends UsbDescriptor {
     private byte mRefresh;
     private byte mSyncAddress;
 
+    private UsbDescriptor mClassSpecificEndpointDescriptor;
+
     public UsbEndpointDescriptor(int length, byte type) {
         super(length, type);
         mHierarchyLevel = 4;
@@ -112,6 +114,14 @@ public class UsbEndpointDescriptor extends UsbDescriptor {
         return mEndpointAddress & UsbEndpointDescriptor.MASK_ENDPOINT_DIRECTION;
     }
 
+    void setClassSpecificEndpointDescriptor(UsbDescriptor descriptor) {
+        mClassSpecificEndpointDescriptor = descriptor;
+    }
+
+    UsbDescriptor getClassSpecificEndpointDescriptor() {
+        return mClassSpecificEndpointDescriptor;
+    }
+
     /**
     * Returns a UsbEndpoint that this UsbEndpointDescriptor is describing.
     */