Play an audio sample grabbed using JavaCV

Play an audio sample grabbed using JavaCV - First announced in March 2017, the Xperia L1 has come to replace Sony’s now discontinued E series. Priced at a surprisingly cheap £169, the L1 is Sony’s newest attempt at shaking up the budget phone market. Its large screen and sleek design make us think of Sony’s higher range of smartphones: it would be hard to single it out as the cheapest model in a line of Xperias. But at such a bargain price, we can’t expect it to perform as well as its more expensive counterparts. So how does the L1 hold up to other low-budget smartphones? Here’s our Xperia L1 review. first time the View branding, well we have collected a lot of data from the field directly and from many other blogs so very complete his discussion here about Play an audio sample grabbed using JavaCV, on this blog we also have to provide the latest automotive information from all the brands associated with the automobile. ok please continue reading:

UPDATED 11/05/2015
Hy friends,its been 1 and half years,posting here.Sorry for this much long delay because of my studies and increasing my memory.My memory is now advanced friends.Here it is after a long time iam gonna give the most frustrating problem developers facing off.

Here it is,iam running a marathon for weeks to find a solution for this problem.First of all i asked to the Javacv groups, to find a solution.


ATLAST,

Here i have found my way to the destination with just a keyword provided by Samuel Audet(JavaCV Project Member).

PCM_FLOAT.

What is the way to play the raw float from javacv to android?Here it is i have created a class.Take it on for free.

package com.shihabsoft.castanythingtopc;
import android.media.AudioFormat;
import android.media.AudioManager;
import android.media.AudioTrack;
public class AndroidAudioDevice
{
AudioTrack track;
short[] buffer = new short[1024];
public AndroidAudioDevice(int sampleRate,int channels)
{  
      int minSize =AudioTrack.getMinBufferSize(sampleRate, channels==1?AudioFormat.CHANNEL_CONFIGURATION_MONO:AudioFormat.CHANNEL_CONFIGURATION_STEREO, AudioFormat.ENCODING_PCM_16BIT );      
      track = new AudioTrack( AudioManager.STREAM_MUSIC, sampleRate, channels==1?AudioFormat.CHANNEL_CONFIGURATION_MONO:AudioFormat.CHANNEL_CONFIGURATION_STEREO, AudioFormat.ENCODING_PCM_16BIT,minSize, AudioTrack.MODE_STREAM);      track.play();          
}
  
public void writeSamples(float[] samples)
{  
    fillBuffer( samples );
    track.write( buffer, 0, samples.length );  
}
private void fillBuffer( float[] samples )  
{  
   if( buffer.length < samples.length )  
     buffer = new short[samples.length];
 
   for( int i = 0; i < samples.length; i++ )  
     buffer[i] = (short)(samples[i] * Short.MAX_VALUE);
}
}

How to use my class.

AndroidAudioDevice aaD=new AndroidAudioDevice(sampleRate Hz,numberOfChannels);
aaD.writeSamples(floatArray);

But iam not so cruel :) ,to leave you after crossing half-quarter of the sea.Here it is i have created the code from top to end ie,Frame to float array.Feel free to use it.

final java.nio.Buffer[] samples=vFrame.samples;
//Getting the samples from the Frame from grabFrame()
float[] smpls;
if(aaD.track.getChannelCount()==1)
//For using with mono track
{
    Buffer b=samples[0];
    fb = (FloatBuffer)b;
    fb.rewind();
    smpls=new float[fb.capacity()];
    fb.get(smpls);
}
else if(aaD.track.getChannelCount()==2)
//For using with stereo track
{
    FloatBuffer b1=(FloatBuffer) samples[0];
    FloatBuffer b2=(FloatBuffer) samples[1];
    smpls=new float[b1.capacity()+b2.capacity()];
    for(int i=0;i<b1.capacity();i++)
       {
         smpls[2*i]=b1.get(i);  smpls[2*i+1]=b2.get(i);
       }
}
aaD.writeSamples(smpls);

Don't ever put the sampleRate and audioChannels manually,Just grab that both from FFmpegFrameRecorder.

Because incase the video have a sample rate of 44kHz and you are initializing the audio track with 8000Hz,the audio will be so distored you may never hear a voice.So be carefull on those two params.

Let me know if you guys are inneed of more details.

For soon i will post a new Sample Application in the JavaCV project.

Asked by Sam.