Topics

1

Audio / Custom SoundStream

« on: November 17, 2015, 10:03:33 pm »

Hi All,

I'm trying to write my own sf::SoundStream but the application crashes with a floating point exception after onGetData is called 3 times.

I'm initializing the sound stream to 2 chanels at 22050 Hz, and filling the data chunk with 735 samples of silence. The rationale is:

22050 / 60 = 367.5 frames
367.5 * 2 channels = 735 samples

However, I'm receiving warnings and then the application crashes:

An internal OpenAL call failed in SoundStream.cpp (327) : AL_INVALID_VALUE, a numeric argument is out of range
An internal OpenAL call failed in SoundStream.cpp (327) : AL_INVALID_VALUE, a numeric argument is out of range
An internal OpenAL call failed in SoundStream.cpp (327) : AL_INVALID_VALUE, a numeric argument is out of range
Floating point exception

My methods are:

void initialize( unsigned sample_rate )
{
  SoundStream::initialize( 2, sample_rate );
}

bool onGetData( Chunk& data )
{
  static int16_t buffer[ 735 ] = { 0 };
  data.samples = buffer;
  data.sampleCount = sizeof( buffer ) / sizeof( buffer[ 0 ] );
  return true;
}

I'm not sure my numbers are correct. In fact, I find it odd that there are 735 samples in a chunk since the number of channels is 2, so I think the number of samples should be even...

Any thoughts? What size the buffer array should be? In SFML terminology, on a stereo stream, a sample is really just one sample, or it's two samples?

My SFML version is 2.1.

Thanks,

Andre

2

Feature requests / Stream classes

« on: September 24, 2009, 08:13:02 pm »

Hi,

One feature that I miss is a set of Stream classes much like SDL's SDL_RWops structure.

The problem is, I want to load resources directly from a package format. Right now I have to unpack the resource to disk or memory and then load it.

Thanks,

Andre