bool create_sound_buffer(sound_buffer_t *buffer, size_t channel_count, size_t sample_rate, size_t bits_per_sample, float duration)
{
if (buffer)
{
ALuint id = 0;
ALenum format = al_format(channel_count, bits_per_sample);
size_t bps = bits_per_sample * sample_rate * channel_count;
size_t nbytes = size_t(ceil(duration * (bps / 8)));
alGenBuffers(1, &id);
if (id == 0) return false;
buffer->Id = id;
buffer->Format = format;
buffer->ChannelCount = channel_count;
buffer->SampleRate = sample_rate;
buffer->BitsPerSample = bits_per_sample;
buffer->DataSize = nbytes;
buffer->Duration = duration;
return true;
}
else return false;
}
void al_mus_process( ALuint b )
{
int l;
ALuint format;
l = si.StreamRead( mus_stream, BUFFER_SIZE, decode_buffer );
if ( l == 0 )
{
si.StreamClose( mus_stream );
mus_stream = si.StreamOpen( s_backgroundLoop );
if ( !mus_stream )
{
SndAl_StopBackgroundTrack();
return;
}
l = si.StreamRead( mus_stream, BUFFER_SIZE, decode_buffer );
}
format = al_format( mus_stream->info.width, mus_stream->info.channels );
qalBufferData( b, format, decode_buffer, l, mus_stream->info.rate );
}
