C++ Memory Problem

Anima

int** buffer = new int*[2];		// 2 channels
buffer[0] = new int[fft_size];
buffer[1] = new int[fft_size];

// zero memory
zeromem( buffer[0], sizeof(int)*fft_size );
zeromem( buffer[1], sizeof(int)*fft_size );

// read in data from audio file, perform FFT and store each frame in the container
for( long offset = 0; offset < reader->lengthInSamples; offset += fft_size ) 
{
	FFT_Frame frame( fft_size );
	reader->read( buffer, 1, offset, fft_size, false );
	FFT( frame, -1, fft_size, (float*)buffer[0] );	// left channel	
	frames.add( frame );
}

delete buffer[0]; buffer[0] = 0;   // throws error here
delete buffer[1]; buffer[1] = 0;
delete [] buffer;

Hey, been stuck on a problem for a while. When it reaches the first delete, it throws a "_Block_Type_Is_Valid (pHead->nBlockUse)" error. From what I read on google, the error is usually cause by deleting something twice but I'm zeroing the pointers so I'm not sure why its happening.

The reader->read() function only takes int** as the buffer type.

Can anyone see anything wrong with the code? I have the feeling I'm doing something stupid...

Anima

Bah typical. Figured it out after posting this. The FFT function was doing something funny. Nevermind.

Lexor

I commented out the loop in your code and everything gets deleted fine (as expected). Can you supply a bit more code for what happens inside your FFT_Frame and FFT constructors and your reader->read(...) function?

Lexor

Cool...

Anima

Yeah I did the same, thats when I realised it was one of the functions causing the problem. Thanks for having a look anyways.