質問編集履歴
1
修正:矩形波送信と正弦波送信について、全てではありませんがプログラムを詳細に掲載しました。
test
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@@ -32,7 +32,201 @@
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```lang-java
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package com.example.xxx.rectanglesender;
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import java.util.ArrayList;
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import java.util.List;
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import android.app.Activity;
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import android.content.Context;
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import android.media.AudioFormat;
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import android.media.AudioManager;
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import android.media.AudioTrack;
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import android.os.Bundle;
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import android.util.Log;
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import android.widget.CompoundButton;
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import android.widget.CompoundButton.OnCheckedChangeListener;
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import android.widget.Switch;
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import android.widget.EditText;
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import android.widget.TextView;
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public class MainActivity extends Activity implements OnCheckedChangeListener {
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int SENDFREQ;
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int VOLUME;
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int SendSR;
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int SendBufSize;
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int musicVolume = 0;
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AudioManager audioManager;
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AudioTrack audioTrack = null;
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private List<SoundDto> soundList = new ArrayList<SoundDto>();
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Thread send;
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boolean bIsPlaying = false;
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@Override
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public void onCreate(Bundle savedInstanceState) {
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super.onCreate(savedInstanceState);
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setContentView(R.layout.activity_main);
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TextView SendfreqText = findViewById(R.id.SendfreqText);
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SendfreqText.setText(R.string.SendfreqText);
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TextView volumeText = findViewById(R.id.volumeText);
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volumeText.setText(R.string.volumeText);
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Switch switch1 = findViewById(R.id.Switch);
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switch1.setOnCheckedChangeListener(this);
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}
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@Override
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public void onCheckedChanged(CompoundButton buttonView, boolean isChecked) {
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if(isChecked) {
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EditText SendfreqEdit = findViewById(R.id.SendfreqEdit);
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EditText volumeEdit = findViewById(R.id.volumeEdit);
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SENDFREQ = Integer.parseInt(SendfreqEdit.getText().toString());
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VOLUME = Integer.parseInt(volumeEdit.getText().toString());
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SendSR = 4 * SENDFREQ;
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SendBufSize = 4 * SENDFREQ;
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audioManager = (AudioManager)getSystemService(Context.AUDIO_SERVICE);
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audioTrack = new AudioTrack(
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AudioManager.STREAM_MUSIC,
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SendSR,
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AudioFormat.CHANNEL_OUT_MONO,
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AudioFormat.ENCODING_PCM_16BIT,
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SendBufSize,
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AudioTrack.MODE_STREAM);
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soundList.add(new SoundDto(createWaves(SendSR)));
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musicVolume = audioManager.getStreamVolume(AudioManager.STREAM_MUSIC);
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audioManager.setStreamVolume(AudioManager.STREAM_MUSIC, VOLUME, 0);
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audioTrack.play();
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bIsPlaying = true;
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send = new Thread(new Runnable() {
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@Override
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public void run() {
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while(bIsPlaying) {
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for(SoundDto sound : soundList) {
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audioTrack.write(sound.getSound(), 0, sound.getSound().length);
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}
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}
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audioTrack.stop();
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audioTrack.release();
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}
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});
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send.start();
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} else {
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if(audioTrack.getPlayState() == AudioTrack.PLAYSTATE_PLAYING) {
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audioTrack.stop();
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bIsPlaying = false;
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}
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audioManager.setStreamVolume(AudioManager.STREAM_MUSIC, musicVolume, 0);
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}
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}
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//波形データ生成
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//波形データ生成
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public byte[] createWaves(int sampleRate) {
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@@ -68,15 +262,325 @@
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}
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}
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```
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#### 正弦波送信
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main
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```lang-java
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package com.example.xxx.sinusoidsender;
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import java.util.ArrayList;
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import java.util.List;
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import android.app.Activity;
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import android.content.Context;
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import android.media.AudioFormat;
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import android.media.AudioManager;
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import android.media.AudioTrack;
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import android.os.Bundle;
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import android.util.Log;
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import android.widget.CompoundButton;
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import android.widget.CompoundButton.OnCheckedChangeListener;
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import android.widget.EditText;
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import android.widget.Switch;
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import android.widget.TextView;
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public class MainActivity extends Activity implements OnCheckedChangeListener {
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//音を何秒鳴らすか
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public static final double WHOLE_NOTE = 1.0;
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//信号音の周波数
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public static final double SIGNAL = 20000;
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public static final double START = 1000;
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int SENDFREQ;
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int VOLUME;
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int SendSR = 44100;
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int SendBufSize = 44100;
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int musicVolume = 0;
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AudioManager audioManager;
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AudioTrack audioTrack = null;
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private List<SoundDto> soundList = new ArrayList<SoundDto>();
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Thread send;
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boolean bIsPlaying = false;
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// Sound生成クラス
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DigitalSoundGenerator soundGenerator;
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@Override
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protected void onCreate(Bundle savedInstanceState) {
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super.onCreate(savedInstanceState);
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setContentView(R.layout.activity_main);
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TextView SendfreqText = findViewById(R.id.SendfreqText);
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SendfreqText.setText(R.string.SendfreqText);
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TextView volumeText = findViewById(R.id.volumeText);
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volumeText.setText(R.string.volumeText);
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Switch switch1 = findViewById(R.id.Switch);
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switch1.setOnCheckedChangeListener(this);
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}
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@Override
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public void onCheckedChanged(CompoundButton buttonView, boolean isChecked) {
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if(isChecked) {
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EditText SendfreqEdit = findViewById(R.id.SendfreqEdit);
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EditText volumeEdit = findViewById(R.id.volumeEdit);
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SENDFREQ = Integer.parseInt(SendfreqEdit.getText().toString());
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VOLUME = Integer.parseInt(volumeEdit.getText().toString());
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audioManager = (AudioManager)getSystemService(Context.AUDIO_SERVICE);
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// SoundGeneratorクラスをサンプルレート44100で作成
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soundGenerator = new DigitalSoundGenerator(44100, 44100);
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// 再生用AudioTrackは、同じサンプルレートで初期化したものを利用する
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audioTrack = soundGenerator.getAudioTrack();
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soundList.add(new SoundDto(generateSound(soundGenerator,SIGNAL), WHOLE_NOTE));
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musicVolume = audioManager.getStreamVolume(AudioManager.STREAM_MUSIC);
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audioManager.setStreamVolume(AudioManager.STREAM_MUSIC, VOLUME, 0);
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audioTrack.play();
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bIsPlaying = true;
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send = new Thread(new Runnable() {
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@Override
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public void run() {
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while(bIsPlaying) {
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for(SoundDto sound : soundList) {
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audioTrack.write(sound.getSound(), 0, sound.getSound().length);
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}
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}
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audioTrack.stop();
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audioTrack.release();
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}
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});
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send.start();
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} else {
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if(audioTrack.getPlayState() == AudioTrack.PLAYSTATE_PLAYING) {
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audioTrack.stop();
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bIsPlaying = false;
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}
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audioManager.setStreamVolume(AudioManager.STREAM_MUSIC, musicVolume, 0);
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}
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}
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494
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79
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-
/**
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495
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/**
|
496
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|
497
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* 8ビットのピコピコ音を生成する
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498
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|
499
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* @param gen Generator
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500
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* @param freq 周波数(音階)
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* @return 音データ
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505
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*/
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506
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public byte[] generateSound(DigitalSoundGenerator gen, double freq) {
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508
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return gen.getSound(freq);
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510
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}
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}
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515
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```
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516
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+
|
517
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+
|
518
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+
|
519
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sound生成
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520
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+
|
521
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```lang-java
|
522
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|
523
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package com.example.xxx.sinusoidsender;
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524
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+
|
525
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+
|
526
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+
|
527
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import android.media.AudioFormat;
|
528
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+
|
529
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+
import android.media.AudioManager;
|
530
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+
|
531
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import android.media.AudioTrack;
|
532
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+
|
533
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+
|
534
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+
|
535
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+
public class DigitalSoundGenerator {
|
536
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+
|
537
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+
|
538
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|
539
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private AudioTrack audioTrack;
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540
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+
|
541
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+
|
542
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+
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543
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private int sampleRate;
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544
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+
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545
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private int bufferSize;
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546
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+
|
547
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+
|
548
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549
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/**
|
550
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+
|
551
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+
* コンストラクタ
|
552
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+
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553
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+
*/
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554
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+
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555
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public DigitalSoundGenerator(int sampleRate, int bufferSize) {
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556
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+
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557
|
+
this.sampleRate = sampleRate;
|
558
|
+
|
559
|
+
this.bufferSize = bufferSize;
|
560
|
+
|
561
|
+
|
562
|
+
|
563
|
+
// AudioTrackを作成
|
564
|
+
|
565
|
+
this.audioTrack = new AudioTrack(
|
566
|
+
|
567
|
+
AudioManager.STREAM_MUSIC,
|
568
|
+
|
569
|
+
sampleRate,
|
570
|
+
|
571
|
+
AudioFormat.CHANNEL_OUT_MONO,
|
572
|
+
|
573
|
+
AudioFormat.ENCODING_PCM_16BIT,
|
574
|
+
|
575
|
+
bufferSize,
|
576
|
+
|
577
|
+
AudioTrack.MODE_STREAM);
|
578
|
+
|
579
|
+
}
|
580
|
+
|
581
|
+
|
582
|
+
|
583
|
+
/**
|
80
584
|
|
81
585
|
* サウンド生成
|
82
586
|
|
@@ -134,4 +638,14 @@
|
|
134
638
|
|
135
639
|
}
|
136
640
|
|
641
|
+
|
642
|
+
|
643
|
+
public AudioTrack getAudioTrack() {
|
644
|
+
|
645
|
+
return this.audioTrack;
|
646
|
+
|
647
|
+
}
|
648
|
+
|
649
|
+
}
|
650
|
+
|
137
651
|
```
|