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| 1 // Copyright 2015 The Chromium Authors. All rights reserved. | |
| 2 // Use of this source code is governed by a BSD-style license that can be | |
| 3 // found in the LICENSE file. | |
| 4 | |
| 5 package org.chromium.media.midi; | |
| 6 | |
| 7 import android.annotation.TargetApi; | |
| 8 import android.media.midi.MidiDevice; | |
| 9 import android.media.midi.MidiInputPort; | |
| 10 import android.os.Build; | |
| 11 | |
| 12 import org.chromium.base.Log; | |
| 13 import org.chromium.base.annotations.CalledByNative; | |
| 14 import org.chromium.base.annotations.JNINamespace; | |
| 15 | |
| 16 import java.io.IOException; | |
| 17 | |
| 18 /** | |
| 19 * A class implementing media::midi::MidiOutputPortAndroid functionality. | |
| 20 */ | |
| 21 // Note "OutputPort" is named in the Web MIDI manner. It corresponds to MidiInpu
tPort class in the | |
| 22 // Android API. | |
| 23 @JNINamespace("media::midi") | |
| 24 @TargetApi(Build.VERSION_CODES.M) | |
| 25 class MidiOutputPortAndroid { | |
| 26 /** | |
| 27 * The underlying port. | |
| 28 */ | |
| 29 private MidiInputPort mPort; | |
| 30 /** | |
| 31 * The device this port belongs to. | |
| 32 */ | |
| 33 private final MidiDevice mDevice; | |
| 34 /** | |
| 35 * The index of the port in the associated device. | |
| 36 */ | |
| 37 private final int mIndex; | |
| 38 | |
| 39 private static final String TAG = "media_midi"; | |
| 40 | |
| 41 /** | |
| 42 * constructor | |
| 43 * @param device The device this port belongs to. | |
| 44 * @param index The index of the port in the associated device. | |
| 45 */ | |
| 46 MidiOutputPortAndroid(MidiDevice device, int index) { | |
| 47 mDevice = device; | |
| 48 mIndex = index; | |
| 49 } | |
| 50 | |
| 51 /** | |
| 52 * Opens this port. | |
| 53 * @return true when the operation succeeds or the port is already open. | |
| 54 */ | |
| 55 @CalledByNative | |
| 56 boolean open() { | |
| 57 if (mPort != null) { | |
| 58 return true; | |
| 59 } | |
| 60 mPort = mDevice.openInputPort(mIndex); | |
| 61 return mPort != null; | |
| 62 } | |
| 63 | |
| 64 /** | |
| 65 * Sends the data to the underlying output port. | |
| 66 */ | |
| 67 @CalledByNative | |
| 68 void send(byte[] bs) { | |
| 69 if (mPort == null) { | |
| 70 return; | |
| 71 } | |
| 72 try { | |
| 73 mPort.send(bs, 0, bs.length); | |
| 74 } catch (IOException e) { | |
| 75 // We can do nothing here. Just ignore the error. | |
| 76 Log.e(TAG, "MidiOutputPortAndroid.send: " + e); | |
| 77 } | |
| 78 } | |
| 79 | |
| 80 /** | |
| 81 * Closes the port. | |
| 82 */ | |
| 83 @CalledByNative | |
| 84 void close() { | |
| 85 if (mPort == null) { | |
| 86 return; | |
| 87 } | |
| 88 try { | |
| 89 mPort.close(); | |
| 90 } catch (IOException e) { | |
| 91 // We can do nothing here. Just ignore the error. | |
| 92 } | |
| 93 mPort = null; | |
| 94 } | |
| 95 } | |
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Chromium Code Reviews
Issue 2418493002:
//media/midi: use top level namespace midi rather than media.midi (Closed)
