Java tutorial
/* * Copyright (C) 2010 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 and * limitations under the License. */ package com.example.nativeaudio; import android.Manifest; import android.annotation.TargetApi; import android.app.Activity; import android.content.Context; import android.content.pm.PackageManager; import android.content.res.AssetManager; import android.media.AudioManager; import android.os.Build; import android.os.Bundle; //import android.support.annotation.NonNull; //import android.support.v4.app.ActivityCompat; import android.util.Log; import android.view.View; import android.view.View.OnClickListener; import android.view.ViewGroup; import android.widget.AdapterView; import android.widget.ArrayAdapter; import android.widget.Button; import android.widget.SeekBar; import android.widget.SeekBar.OnSeekBarChangeListener; import android.widget.Spinner; import android.widget.Toast; public class NativeAudio extends Activity // implements ActivityCompat.OnRequestPermissionsResultCallback { { static final String TAG = "NativeAudio"; private static final int AUDIO_ECHO_REQUEST = 0; static final int CLIP_NONE = 0; static final int CLIP_HELLO = 1; static final int CLIP_ANDROID = 2; static final int CLIP_SAWTOOTH = 3; static final int CLIP_PLAYBACK = 4; static String URI; static AssetManager assetManager; static boolean isPlayingAsset = false; static boolean isPlayingUri = false; static int numChannelsUri = 0; /** Called when the activity is first created. */ @Override @TargetApi(17) protected void onCreate(Bundle icicle) { super.onCreate(icicle); setContentView(R.layout.main); Log.d(TAG, "onCreate ----------- "); assetManager = getAssets(); /* Ctrl+O ? Ctrl+I ? Ctrl+N /? Ctrl+Shift+N Ctrl+Shift+ALt+N ? Ctrl+Space ??? Ctrl+Shift+Space ? Ctrl+Shift+Enter (? ?; ) Ctrl+P ?? Alt+Enter ?/?/ Ctrl+J ?? ( for foreach Toast system.out.println) logm logr loge */ // initialize native audio system createEngine(); int sampleRate = 0; int bufSize = 0; /* * retrieve fast audio path sample rate and buf size; if we have it, we pass to native * side to create a player with fast audio enabled [ fast audio == low latency audio ]; * IF we do not have a fast audio path, we pass 0 for sampleRate, which will force native * side to pick up the 8Khz sample rate. */ if (Build.VERSION.SDK_INT >= Build.VERSION_CODES.JELLY_BEAN_MR1) { AudioManager myAudioMgr = (AudioManager) getSystemService(Context.AUDIO_SERVICE); String nativeParam = myAudioMgr.getProperty(AudioManager.PROPERTY_OUTPUT_SAMPLE_RATE); sampleRate = Integer.parseInt(nativeParam); nativeParam = myAudioMgr.getProperty(AudioManager.PROPERTY_OUTPUT_FRAMES_PER_BUFFER); bufSize = Integer.parseInt(nativeParam); // buffer? PackageManager pm = getPackageManager(); boolean claimsFeature = pm.hasSystemFeature(PackageManager.FEATURE_AUDIO_LOW_LATENCY); // ?5 OUTPUT_SAMPLE_RATE = 48000 OUTPUT_FRAMES_PER_BUFFER = 192 FEATURE_AUDIO_LOW_LATENCY = false // MTK MT6735 OUTPUT_SAMPLE_RATE = 44100 OUTPUT_FRAMES_PER_BUFFER = 1024 FEATURE_AUDIO_LOW_LATENCY = false Log.d(TAG, "OUTPUT_SAMPLE_RATE = " + sampleRate + " OUTPUT_FRAMES_PER_BUFFER = " + bufSize + " FEATURE_AUDIO_LOW_LATENCY = " + claimsFeature); } // buffer queue AudioPlayer Demo createBufferQueueAudioPlayer(sampleRate, bufSize); // initialize URI spinner Spinner uriSpinner = (Spinner) findViewById(R.id.uri_spinner); ArrayAdapter<CharSequence> uriAdapter = ArrayAdapter.createFromResource(this, R.array.local_uri_spinner_array, /* R.array.uri_spinner_array, */ android.R.layout.simple_spinner_item); uriAdapter.setDropDownViewResource(android.R.layout.simple_spinner_dropdown_item); uriSpinner.setAdapter(uriAdapter); uriSpinner.setOnItemSelectedListener(new AdapterView.OnItemSelectedListener() { public void onItemSelected(AdapterView<?> parent, View view, int pos, long id) { URI = parent.getItemAtPosition(pos).toString(); /* ? ? <string-array name="uri_spinner_array"> <item>http://upload.wikimedia.org/wikipedia/commons/6/6d/Banana.ogg</item> <item>http://www.freesound.org/data/previews/18/18765_18799-lq.mp3</item> </string-array> */ } public void onNothingSelected(AdapterView parent) { URI = null; } }); // initialize button click handlers ((Button) findViewById(R.id.hello)).setOnClickListener(new OnClickListener() { public void onClick(View view) { // ignore the return value selectClip(CLIP_HELLO, 2); } }); ((Button) findViewById(R.id.android)).setOnClickListener(new OnClickListener() { public void onClick(View view) { // ignore the return value selectClip(CLIP_ANDROID, 7); } }); ((Button) findViewById(R.id.sawtooth)).setOnClickListener(new OnClickListener() { public void onClick(View view) { // ignore the return value selectClip(CLIP_SAWTOOTH, 1); } }); ((Button) findViewById(R.id.reverb)).setOnClickListener(new OnClickListener() { boolean enabled = false; public void onClick(View view) { enabled = !enabled; if (!enableReverb(enabled)) { enabled = !enabled; } } }); // AssertManager APK?mp3 // ((Button) findViewById(R.id.embedded_soundtrack)).setOnClickListener(new OnClickListener() { boolean created = false; public void onClick(View view) { if (!created) { created = createAssetAudioPlayer(assetManager, "withus.mp3"); } if (created) { // URI AudioPlayer Demo ? // URI AudioPlayer Demo ? ?play pause // Assert/fd AudioPlayer Demo ? isPlayingAsset = !isPlayingAsset; setPlayingAssetAudioPlayer(isPlayingAsset); } } }); ((Button) findViewById(R.id.uri_soundtrack)).setOnClickListener(new OnClickListener() { boolean created = false; public void onClick(View view) { if (!created && URI != null) { Log.d(TAG, " uri_soundtrack create URI Audio Player URI " + URI); //URI = "file:///mnt/sdcard/xxx.3gp" ; //URI = "file:///mnt/sdcard/Banana.ogg" ; created = createUriAudioPlayer(URI); } } }); ((Button) findViewById(R.id.pause_uri)).setOnClickListener(new OnClickListener() { public void onClick(View view) { Log.d(TAG, " setPlayingUriAudioPlayer pause URI "); setPlayingUriAudioPlayer(false); } }); ((Button) findViewById(R.id.play_uri)).setOnClickListener(new OnClickListener() { public void onClick(View view) { Log.d(TAG, " setPlayingUriAudioPlayer play URI "); setPlayingUriAudioPlayer(true); } }); ((Button) findViewById(R.id.loop_uri)).setOnClickListener(new OnClickListener() { boolean isLooping = false; public void onClick(View view) { isLooping = !isLooping; setLoopingUriAudioPlayer(isLooping); } }); ((Button) findViewById(R.id.mute_left_uri)).setOnClickListener(new OnClickListener() { boolean muted = false; public void onClick(View view) { muted = !muted; setChannelMuteUriAudioPlayer(0, muted); } }); ((Button) findViewById(R.id.mute_right_uri)).setOnClickListener(new OnClickListener() { boolean muted = false; public void onClick(View view) { muted = !muted; setChannelMuteUriAudioPlayer(1, muted); } }); ((Button) findViewById(R.id.solo_left_uri)).setOnClickListener(new OnClickListener() { boolean soloed = false; public void onClick(View view) { soloed = !soloed; setChannelSoloUriAudioPlayer(0, soloed); } }); ((Button) findViewById(R.id.solo_right_uri)).setOnClickListener(new OnClickListener() { boolean soloed = false; public void onClick(View view) { soloed = !soloed; setChannelSoloUriAudioPlayer(1, soloed); } }); ((Button) findViewById(R.id.mute_uri)).setOnClickListener(new OnClickListener() { boolean muted = false; public void onClick(View view) { muted = !muted; setMuteUriAudioPlayer(muted); } }); /* * ???? ? Stereo Panning * https://developer.android.com/ndk/guides/audio/opensl-prog-notes.html#panning * * */ ((Button) findViewById(R.id.enable_stereo_position_uri)).setOnClickListener(new OnClickListener() { boolean enabled = false; public void onClick(View view) { enabled = !enabled; enableStereoPositionUriAudioPlayer(enabled); } }); // ?? ?AudioPlayer ??? ?SetPlayState??? ((Button) findViewById(R.id.channels_uri)).setOnClickListener(new OnClickListener() { public void onClick(View view) { if (numChannelsUri == 0) { numChannelsUri = getNumChannelsUriAudioPlayer(); } Toast.makeText(NativeAudio.this, "Channels: " + numChannelsUri, Toast.LENGTH_SHORT).show(); } }); // ?? ((SeekBar) findViewById(R.id.volume_uri)).setOnSeekBarChangeListener(new OnSeekBarChangeListener() { int lastProgress = 100; public void onProgressChanged(SeekBar seekBar, int progress, boolean fromUser) { if (BuildConfig.DEBUG && !(progress >= 0 && progress <= 100)) { throw new AssertionError(); } lastProgress = progress; } public void onStartTrackingTouch(SeekBar seekBar) { } public void onStopTrackingTouch(SeekBar seekBar) { int attenuation = 100 - lastProgress; int millibel = attenuation * -50; // 100 * -50 ~ 0 setVolumeUriAudioPlayer(millibel); } }); ((SeekBar) findViewById(R.id.pan_uri)).setOnSeekBarChangeListener(new OnSeekBarChangeListener() { int lastProgress = 100; public void onProgressChanged(SeekBar seekBar, int progress, boolean fromUser) { if (BuildConfig.DEBUG && !(progress >= 0 && progress <= 100)) { throw new AssertionError(); } lastProgress = progress; } public void onStartTrackingTouch(SeekBar seekBar) { } public void onStopTrackingTouch(SeekBar seekBar) { // ?? ? // ? ? ?<50 >50 ? int permille = (lastProgress - 50) * 20; setStereoPositionUriAudioPlayer(permille); } }); ((SeekBar) findViewById(R.id.playback_rate_uri)).setOnSeekBarChangeListener(new OnSeekBarChangeListener() { int lastProgress = 100; public void onProgressChanged(SeekBar seekBar, int progress, boolean fromUser) { if (BuildConfig.DEBUG && !(progress >= 0 && progress <= 100)) { throw new AssertionError(); } lastProgress = progress; } public void onStartTrackingTouch(SeekBar seekBar) { } public void onStopTrackingTouch(SeekBar seekBar) { /* 0 ----- 50 ---- 100 -1000 --- 0 ---- 1000 */ int permille = lastProgress * (1000 - -1000) / 100 + (-1000); setPlaybackRateUriAudioPlayer(permille); } }); ((Button) findViewById(R.id.record)).setOnClickListener(new OnClickListener() { public void onClick(View view) { // int status = ActivityCompat.checkSelfPermission(NativeAudio.this, // Manifest.permission.RECORD_AUDIO); // if (status != PackageManager.PERMISSION_GRANTED) { // ActivityCompat.requestPermissions( // NativeAudio.this, // new String[]{Manifest.permission.RECORD_AUDIO}, // AUDIO_ECHO_REQUEST); // return; // } recordAudio(); } }); ((Button) findViewById(R.id.playback)).setOnClickListener(new OnClickListener() { public void onClick(View view) { // ignore the return value selectClip(CLIP_PLAYBACK, 3); } }); } // Single out recording for run-permission needs static boolean created = false; private void recordAudio() { if (!created) { created = createAudioRecorder(); } if (created) { startRecording(); } } /** Called when the activity is about to be destroyed. */ @Override protected void onPause() { Log.d(TAG, "onPause"); // turn off all audio selectClip(CLIP_NONE, 0); isPlayingAsset = false; setPlayingAssetAudioPlayer(false); isPlayingUri = false; setPlayingUriAudioPlayer(false); super.onPause(); } /** Called when the activity is about to be destroyed. */ @Override protected void onDestroy() { Log.d(TAG, "onDestroy"); shutdown(); super.onDestroy(); } // @Override // public void onRequestPermissionsResult(int requestCode, @NonNull String[] permissions, // @NonNull int[] grantResults) { // /* // * if any permission failed, the sample could not play // */ // if (AUDIO_ECHO_REQUEST != requestCode) { // super.onRequestPermissionsResult(requestCode, permissions, grantResults); // return; // } // // if (grantResults.length != 1 || // grantResults[0] != PackageManager.PERMISSION_GRANTED) { // /* // * When user denied the permission, throw a Toast to prompt that RECORD_AUDIO // * is necessary; on UI, we display the current status as permission was denied so // * user know what is going on. // * This application go back to the original state: it behaves as if the button // * was not clicked. The assumption is that user will re-click the "start" button // * (to retry), or shutdown the app in normal way. // */ // Toast.makeText(getApplicationContext(), // getString(R.string.NeedRecordAudioPermission), // Toast.LENGTH_SHORT) // .show(); // return; // } // // // The callback runs on app's thread, so we are safe to resume the action // recordAudio(); // } /** Native methods, implemented in jni folder */ public static native void createEngine(); public static native void createBufferQueueAudioPlayer(int sampleRate, int samplesPerBuf); public static native boolean createAssetAudioPlayer(AssetManager assetManager, String filename); // true == PLAYING, false == PAUSED public static native void setPlayingAssetAudioPlayer(boolean isPlaying); public static native boolean createUriAudioPlayer(String uri); public static native void setPlayingUriAudioPlayer(boolean isPlaying); public static native void setLoopingUriAudioPlayer(boolean isLooping); public static native void setChannelMuteUriAudioPlayer(int chan, boolean mute); public static native void setChannelSoloUriAudioPlayer(int chan, boolean solo); public static native int getNumChannelsUriAudioPlayer(); public static native void setVolumeUriAudioPlayer(int millibel); // mB public static native void setMuteUriAudioPlayer(boolean mute); public static native void enableStereoPositionUriAudioPlayer(boolean enable); public static native void setStereoPositionUriAudioPlayer(int permille); public static native void setPlaybackRateUriAudioPlayer(int permille); // ? public static native boolean selectClip(int which, int count); public static native boolean enableReverb(boolean enabled); public static native boolean createAudioRecorder(); public static native void startRecording(); public static native void shutdown(); /** Load jni .so on initialization */ static { System.loadLibrary("native-audio-jni"); } }