| 1 | // Copyright 2013 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; |
| 6 | |
| 7 | import android.content.BroadcastReceiver; |
| 8 | import android.content.Context; |
| 9 | import android.content.Intent; |
| 10 | import android.content.IntentFilter; |
| 11 | import android.content.pm.PackageManager; |
| 12 | import android.media.AudioFormat; |
| 13 | import android.media.AudioManager; |
| 14 | import android.media.AudioRecord; |
| 15 | import android.media.AudioTrack; |
| 16 | import android.os.Build; |
| 17 | import android.util.Log; |
| 18 | |
| 19 | import org.chromium.base.CalledByNative; |
| 20 | import org.chromium.base.JNINamespace; |
| 21 | |
| 22 | @JNINamespace("media") |
| 23 | class AudioManagerAndroid { |
| 24 | private static final String TAG = "AudioManagerAndroid"; |
| 25 | |
| 26 | // Most of Google lead devices use 44.1K as the default sampling rate, 44.1K |
| 27 | // is also widely used on other android devices. |
| 28 | private static final int DEFAULT_SAMPLING_RATE = 44100; |
| 29 | // Randomly picked up frame size which is close to return value on N4. |
| 30 | // Return this default value when |
| 31 | // getProperty(PROPERTY_OUTPUT_FRAMES_PER_BUFFER) fails. |
| 32 | private static final int DEFAULT_FRAME_PER_BUFFER = 256; |
| 33 | |
| 34 | private final AudioManager mAudioManager; |
| 35 | private final Context mContext; |
| 36 | |
| 37 | private BroadcastReceiver mReceiver; |
| 38 | private boolean mOriginalSpeakerStatus; |
| 39 | |
| 40 | @CalledByNative |
| 41 | public void setMode(int mode) { |
| 42 | try { |
| 43 | mAudioManager.setMode(mode); |
| 44 | } catch (SecurityException e) { |
| 45 | Log.e(TAG, "setMode exception: " + e.getMessage()); |
| 46 | logDeviceInfo(); |
| 47 | } |
| 48 | } |
| 49 | |
| 50 | @CalledByNative |
| 51 | private static AudioManagerAndroid createAudioManagerAndroid(Context context) { |
| 52 | return new AudioManagerAndroid(context); |
| 53 | } |
| 54 | |
| 55 | private AudioManagerAndroid(Context context) { |
| 56 | mContext = context; |
| 57 | mAudioManager = (AudioManager)mContext.getSystemService(Context.AUDIO_SERVICE); |
| 58 | } |
| 59 | |
| 60 | @CalledByNative |
| 61 | public void registerHeadsetReceiver() { |
| 62 | if (mReceiver != null) { |
| 63 | return; |
| 64 | } |
| 65 | |
| 66 | mOriginalSpeakerStatus = mAudioManager.isSpeakerphoneOn(); |
| 67 | IntentFilter filter = new IntentFilter(Intent.ACTION_HEADSET_PLUG); |
| 68 | |
| 69 | mReceiver = new BroadcastReceiver() { |
| 70 | @Override |
| 71 | public void onReceive(Context context, Intent intent) { |
| 72 | if (Intent.ACTION_HEADSET_PLUG.equals(intent.getAction())) { |
| 73 | try { |
| 74 | mAudioManager.setSpeakerphoneOn( |
| 75 | intent.getIntExtra("state", 0) == 0); |
| 76 | } catch (SecurityException e) { |
| 77 | Log.e(TAG, "setMode exception: " + e.getMessage()); |
| 78 | logDeviceInfo(); |
| 79 | } |
| 80 | } |
| 81 | } |
| 82 | }; |
| 83 | mContext.registerReceiver(mReceiver, filter); |
| 84 | } |
| 85 | |
| 86 | @CalledByNative |
| 87 | public void unregisterHeadsetReceiver() { |
| 88 | mContext.unregisterReceiver(mReceiver); |
| 89 | mReceiver = null; |
| 90 | mAudioManager.setSpeakerphoneOn(mOriginalSpeakerStatus); |
| 91 | } |
| 92 | |
| 93 | private void logDeviceInfo() { |
| 94 | Log.i(TAG, "Manufacturer:" + Build.MANUFACTURER + |
| 95 | " Board: " + Build.BOARD + " Device: " + Build.DEVICE + |
| 96 | " Model: " + Build.MODEL + " PRODUCT: " + Build.PRODUCT); |
| 97 | } |
| 98 | |
| 99 | @CalledByNative |
| 100 | private int getNativeOutputSampleRate() { |
| 101 | if (android.os.Build.VERSION.SDK_INT >= android.os.Build.VERSION_CODES.JELLY_BEAN_MR1) { |
| 102 | String sampleRateString = mAudioManager.getProperty( |
| 103 | AudioManager.PROPERTY_OUTPUT_SAMPLE_RATE); |
| 104 | return (sampleRateString == null ? |
| 105 | DEFAULT_SAMPLING_RATE : Integer.parseInt(sampleRateString)); |
| 106 | } else { |
| 107 | return DEFAULT_SAMPLING_RATE; |
| 108 | } |
| 109 | } |
| 110 | |
| 111 | /** |
| 112 | * Returns the minimum frame size required for audio input. |
| 113 | * |
| 114 | * @param sampleRate sampling rate |
| 115 | * @param channels number of channels |
| 116 | */ |
| 117 | @CalledByNative |
| 118 | private static int getMinInputFrameSize(int sampleRate, int channels) { |
| 119 | int channelConfig; |
| 120 | if (channels == 1) { |
| 121 | channelConfig = AudioFormat.CHANNEL_IN_MONO; |
| 122 | } else if (channels == 2) { |
| 123 | channelConfig = AudioFormat.CHANNEL_IN_STEREO; |
| 124 | } else { |
| 125 | return -1; |
| 126 | } |
| 127 | return AudioRecord.getMinBufferSize( |
| 128 | sampleRate, channelConfig, AudioFormat.ENCODING_PCM_16BIT) / 2 / channels; |
| 129 | } |
| 130 | |
| 131 | /** |
| 132 | * Returns the minimum frame size required for audio output. |
| 133 | * |
| 134 | * @param sampleRate sampling rate |
| 135 | * @param channels number of channels |
| 136 | */ |
| 137 | @CalledByNative |
| 138 | private static int getMinOutputFrameSize(int sampleRate, int channels) { |
| 139 | int channelConfig; |
| 140 | if (channels == 1) { |
| 141 | channelConfig = AudioFormat.CHANNEL_OUT_MONO; |
| 142 | } else if (channels == 2) { |
| 143 | channelConfig = AudioFormat.CHANNEL_OUT_STEREO; |
| 144 | } else { |
| 145 | return -1; |
| 146 | } |
| 147 | return AudioTrack.getMinBufferSize( |
| 148 | sampleRate, channelConfig, AudioFormat.ENCODING_PCM_16BIT) / 2 / channels; |
| 149 | } |
| 150 | |
| 151 | @CalledByNative |
| 152 | private boolean isAudioLowLatencySupported() { |
| 153 | return mContext.getPackageManager().hasSystemFeature( |
| 154 | PackageManager.FEATURE_AUDIO_LOW_LATENCY); |
| 155 | } |
| 156 | |
| 157 | @CalledByNative |
| 158 | private int getAudioLowLatencyOutputFrameSize() { |
| 159 | String framesPerBuffer = |
| 160 | mAudioManager.getProperty(AudioManager.PROPERTY_OUTPUT_FRAMES_PER_BUFFER); |
| 161 | return (framesPerBuffer == null ? |
| 162 | DEFAULT_FRAME_PER_BUFFER : Integer.parseInt(framesPerBuffer)); |
| 163 | } |
| 164 | |
| 165 | } |