Recording sound into a file.

Eric · 02-24-2014 11:33 AM

Hello,
I'm trying to write a program which records sound into a raw, binary compressed file. I have no problem with reading that file but when writing to it I have one little problem. Let me explain:

1. I'm creating SoundCapture and starting writing into 'File recfile;' in Init():

Code:

if(!SoundCapture.create(null, 16, 1, 44100))Exit("Failed to capture sound"); 

if(!recfile.writeTry("Recorded sound")) Exit("Cannot write to recfile!");

recfile.write("Recorded sound");

2. In Update() after checking if the record's buffer is full I'm trying to write that buffer's data into 'recfile' with:

Code:

/* (samples = SoundCapture.size()/SIZE(short)) */

if((SoundCapture.pos()/SIZE(short))>=samples) // HERE 

         if(!recfile.put(SoundCapture.data(), SoundCapture.size()))

         Exit("Cannot put into recfile!");

and HERE is the problem, I don't know when the record's buffer is full (that 'here' condition is never true) so I could 'Put()' that buffer's data into 'recfile'.

Have you got any ideas how can I solve this problem?
Thanks in advance.
Eri
ourgames.eu

P.S. What does the SoundCaptureClass::Update() function? The comment doesn't explain this to me clearly enough.

Eric · 02-28-2014 09:12 AM

UP. This is very important to me.

**Esenthel** · 02-28-2014 09:27 PM

I recommend getting a license, I could provide some hints.

Eric · 03-01-2014 10:40 AM

Smart!

Dear Esenthel, if I'm able to record sound (which with capturing video are main features of my upcoming program) I'm calling my coworker to buy the license smile

Eric · 03-06-2014 04:19 PM

Esenthel, as you can see I became Licensed Developer wink

Waiting for hints!

**Esenthel** · 03-06-2014 08:50 PM

That's a good choice smile

The way to do this, is to monitor the sound capture progress very frequently (every frame), and think of the buffer as of 2 halfs.

Code:

Bool last_half=0;

in the monitor code do:

Bool cur_half=( buffer.pos >= buffer.size/2); // current half of the buffer

if(last_half!=cur_half)

{

   last_half=cur_half;

  // save the half of the buffer data to disk

}

Eric · 04-03-2014 05:39 PM

Thank you Esenthel, my program works perfectly. It's funny how simple ideas can solve problems. wink

Recording sound into a file.
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