public class MainActivity extends Activity{
Button button;
Button button2;
boolean isRecording;
AudioRecord audioRecord;
int audioSource=AudioSource.MIC;
int sampleRate=44100;
int channelConfig=AudioFormat.CHANNEL_IN_STEREO;
int audioFormat=AudioFormat.ENCODING_PCM_16BIT;
int bufferSize=AudioRecord.getMinBufferSize(sampleRate, channelConfig, audioFormat);
//AudioTrack audioTrack=new AudioTrack(AudioManager.STREAM_MUSIC,sampleRate,channelConfig,audioFormat,bufferSize,AudioTrack.MODE_STATIC);
short[] buffer=new short[(bufferSize/2)];
protected void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.activity_main);
Log.v("Buffer size",bufferSize+"");
Log.v("Length", buffer.length+"");
for(int i=0;i<bufferSize/2;i++){
Log.v(i+"", buffer[i]+"");
}
button=(Button)findViewById(R.id.button1);
button.setOnClickListener(new View.OnClickListener() {
@Override
public void onClick(View v) {
azione();
}
});
button2=(Button)findViewById(R.id.button2);
button2.setOnClickListener(new View.OnClickListener() {
@Override
public void onClick(View v) {
isRecording=false;
audioRecord.stop();
audioRecord.release();
audioRecord=null;
Log.v("spento", "SPENTO");
//ULTIMA MODIFICA--------------------------------
for(int i=0;i<bufferSize/2;i++){
Log.v(i+"", (short)buffer[i]+"");
}
}
});
}
public void azione(){
audioRecord=new AudioRecord(audioSource,sampleRate,channelConfig,audioFormat,bufferSize/2);
audioRecord.startRecording();
isRecording=true;
Thread thread=new Thread(new Runnable(){
@Override
public void run() {
while(isRecording){
int rd=audioRecord.read(buffer, 0, bufferSize/2);
}
}
});
thread.start();
}
}
Visualizzazione post con etichetta audio_digitale. Mostra tutti i post
Visualizzazione post con etichetta audio_digitale. Mostra tutti i post
venerdì 18 marzo 2016
Codice sicuramente funzionante per l'AudioRecord
Rappresentazione di un'onda sonora?
Usando AudioRecord, ho ottenuto nel buffer questi numeri:
03-18 16:09:00.370: V/0(2345): 35 03-18 16:09:00.370: V/1(2345): 35 03-18 16:09:00.370: V/2(2345): 32 03-18 16:09:00.370: V/3(2345): 32 03-18 16:09:00.370: V/4(2345): 29 03-18 16:09:00.370: V/5(2345): 29 03-18 16:09:00.370: V/6(2345): 26 03-18 16:09:00.370: V/7(2345): 26 03-18 16:09:00.370: V/8(2345): 23 03-18 16:09:00.370: V/9(2345): 23 03-18 16:09:00.370: V/10(2345): 18 03-18 16:09:00.370: V/11(2345): 18 03-18 16:09:00.370: V/12(2345): 14 03-18 16:09:00.370: V/13(2345): 14 03-18 16:09:00.370: V/14(2345): 9 03-18 16:09:00.370: V/15(2345): 9 03-18 16:09:00.370: V/16(2345): 3 03-18 16:09:00.370: V/17(2345): 3 03-18 16:09:00.370: V/18(2345): -3 03-18 16:09:00.370: V/19(2345): -3 03-18 16:09:00.370: V/20(2345): -10 03-18 16:09:00.370: V/21(2345): -10 03-18 16:09:00.370: V/22(2345): -17 03-18 16:09:00.370: V/23(2345): -17 03-18 16:09:00.370: V/24(2345): -24 03-18 16:09:00.370: V/25(2345): -24 03-18 16:09:00.370: V/26(2345): -31 03-18 16:09:00.370: V/27(2345): -31 03-18 16:09:00.370: V/28(2345): -39 03-18 16:09:00.370: V/29(2345): -39 03-18 16:09:00.370: V/30(2345): -46 03-18 16:09:00.370: V/31(2345): -46 03-18 16:09:00.370: V/32(2345): -52 03-18 16:09:00.370: V/33(2345): -52 03-18 16:09:00.370: V/34(2345): -59 03-18 16:09:00.370: V/35(2345): -59 03-18 16:09:00.370: V/36(2345): -64 03-18 16:09:00.370: V/37(2345): -64 03-18 16:09:00.370: V/38(2345): -70 03-18 16:09:00.370: V/39(2345): -70 03-18 16:09:00.370: V/40(2345): -74 03-18 16:09:00.370: V/41(2345): -74 03-18 16:09:00.370: V/42(2345): -79 03-18 16:09:00.370: V/43(2345): -79 03-18 16:09:00.370: V/44(2345): -82 03-18 16:09:00.370: V/45(2345): -82 03-18 16:09:00.370: V/46(2345): -86 03-18 16:09:00.370: V/47(2345): -86 03-18 16:09:00.370: V/48(2345): -90 03-18 16:09:00.370: V/49(2345): -90 03-18 16:09:00.370: V/50(2345): -94 03-18 16:09:00.370: V/51(2345): -94 03-18 16:09:00.370: V/52(2345): -97 03-18 16:09:00.370: V/53(2345): -97 03-18 16:09:00.370: V/54(2345): -101 03-18 16:09:00.370: V/55(2345): -101 03-18 16:09:00.370: V/56(2345): -106 03-18 16:09:00.370: V/57(2345): -106 03-18 16:09:00.370: V/58(2345): -110 03-18 16:09:00.370: V/59(2345): -110 03-18 16:09:00.370: V/60(2345): -115 03-18 16:09:00.370: V/61(2345): -115 03-18 16:09:00.370: V/62(2345): -119 03-18 16:09:00.370: V/63(2345): -119 03-18 16:09:00.370: V/64(2345): -124 03-18 16:09:00.370: V/65(2345): -124 03-18 16:09:00.370: V/66(2345): -128 03-18 16:09:00.370: V/67(2345): -128 03-18 16:09:00.370: V/68(2345): -131 03-18 16:09:00.370: V/69(2345): -131 03-18 16:09:00.370: V/70(2345): -134 03-18 16:09:00.370: V/71(2345): -134 03-18 16:09:00.370: V/72(2345): -137 03-18 16:09:00.370: V/73(2345): -137 03-18 16:09:00.370: V/74(2345): -138 03-18 16:09:00.370: V/75(2345): -138 03-18 16:09:00.370: V/76(2345): -139 03-18 16:09:00.370: V/77(2345): -139 03-18 16:09:00.370: V/78(2345): -139 03-18 16:09:00.370: V/79(2345): -139 03-18 16:09:00.370: V/80(2345): -138 03-18 16:09:00.370: V/81(2345): -138 03-18 16:09:00.370: V/82(2345): -136 03-18 16:09:00.370: V/83(2345): -136 03-18 16:09:00.370: V/84(2345): -134 03-18 16:09:00.370: V/85(2345): -134 03-18 16:09:00.370: V/86(2345): -130 03-18 16:09:00.370: V/87(2345): -130 03-18 16:09:00.370: V/88(2345): -126 03-18 16:09:00.370: V/89(2345): -126 03-18 16:09:00.370: V/90(2345): -120 03-18 16:09:00.370: V/91(2345): -120 03-18 16:09:00.370: V/92(2345): -114 03-18 16:09:00.370: V/93(2345): -114 03-18 16:09:00.370: V/94(2345): -108 03-18 16:09:00.370: V/95(2345): -108 03-18 16:09:00.370: V/96(2345): -100 03-18 16:09:00.370: V/97(2345): -100 03-18 16:09:00.370: V/98(2345): -93 03-18 16:09:00.370: V/99(2345): -93 03-18 16:09:00.370: V/100(2345): -85 03-18 16:09:00.370: V/101(2345): -85 03-18 16:09:00.370: V/102(2345): -77 03-18 16:09:00.370: V/103(2345): -77 03-18 16:09:00.370: V/104(2345): -70 03-18 16:09:00.370: V/105(2345): -70 03-18 16:09:00.370: V/106(2345): -62 03-18 16:09:00.370: V/107(2345): -62 03-18 16:09:00.370: V/108(2345): -55 03-18 16:09:00.370: V/109(2345): -55 03-18 16:09:00.370: V/110(2345): -48 03-18 16:09:00.370: V/111(2345): -48 03-18 16:09:00.370: V/112(2345): -41 03-18 16:09:00.370: V/113(2345): -41 03-18 16:09:00.370: V/114(2345): -35 03-18 16:09:00.370: V/115(2345): -35 03-18 16:09:00.370: V/116(2345): -29 03-18 16:09:00.370: V/117(2345): -29 03-18 16:09:00.370: V/118(2345): -23 03-18 16:09:00.370: V/119(2345): -23 03-18 16:09:00.370: V/120(2345): -17 03-18 16:09:00.370: V/121(2345): -17 03-18 16:09:00.370: V/122(2345): -11 03-18 16:09:00.370: V/123(2345): -11 03-18 16:09:00.370: V/124(2345): -5 03-18 16:09:00.370: V/125(2345): -5 03-18 16:09:00.370: V/126(2345): 1 03-18 16:09:00.370: V/127(2345): 1 03-18 16:09:00.370: V/128(2345): 8 03-18 16:09:00.370: V/129(2345): 8 03-18 16:09:00.370: V/130(2345): 15 03-18 16:09:00.370: V/131(2345): 15 03-18 16:09:00.370: V/132(2345): 22 03-18 16:09:00.370: V/133(2345): 22 03-18 16:09:00.370: V/134(2345): 29 03-18 16:09:00.370: V/135(2345): 29 03-18 16:09:00.370: V/136(2345): 37 03-18 16:09:00.370: V/137(2345): 37 03-18 16:09:00.370: V/138(2345): 45 03-18 16:09:00.370: V/139(2345): 45 03-18 16:09:00.370: V/140(2345): 53 03-18 16:09:00.370: V/141(2345): 53 03-18 16:09:00.370: V/142(2345): 60 03-18 16:09:00.370: V/143(2345): 60 03-18 16:09:00.370: V/144(2345): 68 03-18 16:09:00.370: V/145(2345): 68 03-18 16:09:00.370: V/146(2345): 74 03-18 16:09:00.370: V/147(2345): 74 03-18 16:09:00.370: V/148(2345): 81 03-18 16:09:00.370: V/149(2345): 81 03-18 16:09:00.370: V/150(2345): 87 03-18 16:09:00.370: V/151(2345): 87 03-18 16:09:00.370: V/152(2345): 92 03-18 16:09:00.370: V/153(2345): 92 03-18 16:09:00.370: V/154(2345): 97 03-18 16:09:00.370: V/155(2345): 97 03-18 16:09:00.370: V/156(2345): 101 03-18 16:09:00.370: V/157(2345): 101 03-18 16:09:00.370: V/158(2345): 105 03-18 16:09:00.370: V/159(2345): 105 03-18 16:09:00.370: V/160(2345): 108 03-18 16:09:00.370: V/161(2345): 108 03-18 16:09:00.370: V/162(2345): 110 03-18 16:09:00.370: V/163(2345): 110 03-18 16:09:00.370: V/164(2345): 112 03-18 16:09:00.370: V/165(2345): 112 03-18 16:09:00.370: V/166(2345): 114 03-18 16:09:00.370: V/167(2345): 114 03-18 16:09:00.370: V/168(2345): 116 03-18 16:09:00.370: V/169(2345): 116 03-18 16:09:00.370: V/170(2345): 117 03-18 16:09:00.370: V/171(2345): 117 03-18 16:09:00.370: V/172(2345): 118 03-18 16:09:00.370: V/173(2345): 118 03-18 16:09:00.370: V/174(2345): 119 03-18 16:09:00.370: V/175(2345): 119 03-18 16:09:00.370: V/176(2345): 120 03-18 16:09:00.370: V/177(2345): 120 03-18 16:09:00.370: V/178(2345): 121 03-18 16:09:00.370: V/179(2345): 121 03-18 16:09:00.370: V/180(2345): 122 03-18 16:09:00.370: V/181(2345): 122 03-18 16:09:00.370: V/182(2345): 123 03-18 16:09:00.370: V/183(2345): 123 03-18 16:09:00.370: V/184(2345): 125 03-18 16:09:00.370: V/185(2345): 125 03-18 16:09:00.370: V/186(2345): 127 03-18 16:09:00.370: V/187(2345): 127 03-18 16:09:00.370: V/188(2345): 129 03-18 16:09:00.370: V/189(2345): 129 03-18 16:09:00.370: V/190(2345): 131 03-18 16:09:00.370: V/191(2345): 131 03-18 16:09:00.370: V/192(2345): 133 03-18 16:09:00.370: V/193(2345): 133 03-18 16:09:00.370: V/194(2345): 135 03-18 16:09:00.370: V/195(2345): 135 03-18 16:09:00.370: V/196(2345): 136 03-18 16:09:00.370: V/197(2345): 136 03-18 16:09:00.370: V/198(2345): 137 03-18 16:09:00.370: V/199(2345): 137 03-18 16:09:00.370: V/200(2345): 138 03-18 16:09:00.370: V/201(2345): 138 03-18 16:09:00.370: V/202(2345): 137 03-18 16:09:00.370: V/203(2345): 137 03-18 16:09:00.370: V/204(2345): 136 03-18 16:09:00.370: V/205(2345): 136 03-18 16:09:00.370: V/206(2345): 133 03-18 16:09:00.370: V/207(2345): 133 03-18 16:09:00.370: V/208(2345): 129 03-18 16:09:00.370: V/209(2345): 129 03-18 16:09:00.370: V/210(2345): 125 03-18 16:09:00.370: V/211(2345): 125 03-18 16:09:00.370: V/212(2345): 119 03-18 16:09:00.370: V/213(2345): 119 03-18 16:09:00.370: V/214(2345): 113 03-18 16:09:00.370: V/215(2345): 113 03-18 16:09:00.370: V/216(2345): 106 03-18 16:09:00.370: V/217(2345): 106 03-18 16:09:00.370: V/218(2345): 98 03-18 16:09:00.370: V/219(2345): 98 03-18 16:09:00.370: V/220(2345): 90 03-18 16:09:00.370: V/221(2345): 90 03-18 16:09:00.370: V/222(2345): 82 03-18 16:09:00.370: V/223(2345): 82 03-18 16:09:00.370: V/224(2345): 74 03-18 16:09:00.370: V/225(2345): 74 03-18 16:09:00.370: V/226(2345): 65 03-18 16:09:00.370: V/227(2345): 65 03-18 16:09:00.370: V/228(2345): 56 03-18 16:09:00.370: V/229(2345): 56 03-18 16:09:00.370: V/230(2345): 48 03-18 16:09:00.370: V/231(2345): 48 03-18 16:09:00.370: V/232(2345): 39 03-18 16:09:00.370: V/233(2345): 39 03-18 16:09:00.370: V/234(2345): 30 03-18 16:09:00.370: V/235(2345): 30 03-18 16:09:00.370: V/236(2345): 21 03-18 16:09:00.370: V/237(2345): 21 03-18 16:09:00.370: V/238(2345): 12 03-18 16:09:00.370: V/239(2345): 12 03-18 16:09:00.370: V/240(2345): 2 03-18 16:09:00.370: V/241(2345): 2 03-18 16:09:00.370: V/242(2345): -7 03-18 16:09:00.370: V/243(2345): -7 03-18 16:09:00.370: V/244(2345): -16 03-18 16:09:00.370: V/245(2345): -16 03-18 16:09:00.370: V/246(2345): -25 03-18 16:09:00.370: V/247(2345): -25 03-18 16:09:00.370: V/248(2345): -35 03-18 16:09:00.370: V/249(2345): -35 03-18 16:09:00.370: V/250(2345): -44 03-18 16:09:00.370: V/251(2345): -44 03-18 16:09:00.370: V/252(2345): -54 03-18 16:09:00.370: V/253(2345): -54 03-18 16:09:00.370: V/254(2345): -64 03-18 16:09:00.370: V/255(2345): -64 03-18 16:09:00.370: V/256(2345): -74 03-18 16:09:00.370: V/257(2345): -74 03-18 16:09:00.370: V/258(2345): -84 03-18 16:09:00.370: V/259(2345): -84 03-18 16:09:00.370: V/260(2345): -94 03-18 16:09:00.370: V/261(2345): -94 03-18 16:09:00.370: V/262(2345): -104 03-18 16:09:00.370: V/263(2345): -104 03-18 16:09:00.370: V/264(2345): -114 03-18 16:09:00.370: V/265(2345): -114 03-18 16:09:00.370: V/266(2345): -123 03-18 16:09:00.370: V/267(2345): -123 03-18 16:09:00.370: V/268(2345): -132 03-18 16:09:00.370: V/269(2345): -132 03-18 16:09:00.370: V/270(2345): -141 03-18 16:09:00.370: V/271(2345): -141 03-18 16:09:00.370: V/272(2345): -149 03-18 16:09:00.370: V/273(2345): -149 03-18 16:09:00.370: V/274(2345): -156 03-18 16:09:00.370: V/275(2345): -156 03-18 16:09:00.370: V/276(2345): -162 03-18 16:09:00.370: V/277(2345): -162Un andamento sinusoidale? Sto VEDENDO LA RAPPRESENTAZIONE DI UN'ONDA SONORA????? Non ne sono sicuro, ma sarebbe pazzescamente FANTASTICO!!!
lunedì 14 marzo 2016
audioRecorder, primi rudimenti.
Mi preparo tutte le impostazioni relative al tipo di segnale digitale, e dichiaro la variabile per l'audioRecorder e per il Thread (è ovvio che la registrazione va su un thread separato altrimenti si impappa tutto),
Poi ho due metodi: startRecording, che istanzia un audioRecorder e lo avvia sul thread suo leggendo i dati che arrivano dal microfono (o altra fonte) nel buffer; e stopRecording che stoppa il loop della registrazione, ferma l'audioRecorder e me lo distrugge.
Ecco le dichiarazioni:
Poi il codice che crea e quello che distrugge l'audioRecorder:
La prima funzione è startRecording:
E l'altra è stopRecording:
Ovviamente non lo posso testare perché mi manca ancora uno strumento con funzioni di player...
Comunque perlomeno non si blocca, ed è già qualcosa.
Poi ho due metodi: startRecording, che istanzia un audioRecorder e lo avvia sul thread suo leggendo i dati che arrivano dal microfono (o altra fonte) nel buffer; e stopRecording che stoppa il loop della registrazione, ferma l'audioRecorder e me lo distrugge.
Ecco le dichiarazioni:
private Thread recordingThread=null; boolean isRecording; Button button1; int audioSource=AudioSource.MIC; int sampleRate=8000; int channelConfig=AudioFormat.CHANNEL_IN_MONO; int audioFormat=AudioFormat.ENCODING_PCM_16BIT; int bufferSizeInBytes=AudioRecord.getMinBufferSize(sampleRate, channelConfig, audioFormat); AudioRecord audioRecord; byte[] buffer=new byte[bufferSizeInBytes];E il codice che attribuisce il listener al bottone che avvia e stoppa la registrazione:
@Override
protected void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.activity_main);
button1=(Button)findViewById(R.id.button1);
button1.setOnClickListener(new View.OnClickListener() {
@Override
public void onClick(View v) {
if(isRecording){
((Button)v).setText("Stop recording");
stopRecording();
}
else{
((Button)v).setText("Start recording");
startRecording();
}
}
});
Poi il codice che crea e quello che distrugge l'audioRecorder:
La prima funzione è startRecording:
public void startRecording(){
isRecording=true;
audioRecord=new AudioRecord(audioSource,sampleRate,channelConfig,audioFormat,bufferSizeInBytes);
recordingThread=new Thread(new Runnable(){
@Override
public void run() {
while(isRecording){
audioRecord.read(buffer,0,bufferSizeInBytes);
}
}
});
}
E l'altra è stopRecording:
public void stopRecording(){
isRecording=false;
audioRecord.stop();
audioRecord.release();
audioRecord=null;
}
E pare che funzioni.Ovviamente non lo posso testare perché mi manca ancora uno strumento con funzioni di player...
Comunque perlomeno non si blocca, ed è già qualcosa.
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