Hello everybody,
I'm newbie in vamp and also in c++.
I have a DJ application that uses bass.dll, but the bpm counter of bass.dll is not very precise, and I want proccess the song throught vapm plugins to get the exact bpm.
If I use fixedtempo:0 with output = 0 (tempo), modifing your vamp-simple-host example to use with bass:
I get this:
0.002902494, 59.998911565: 51.3587 51.4 bpm
when the real bpm ( in traktor and virtual dj ) is 93.232
I use bass decode to send data to process:
BASS_Init(-1,44100,BASS_DEVICE_MONO,0,NULL); //only one channel
stream = BASS_StreamCreateFile(FALSE,filename,0,0, BASS_STREAM_DECODE | BASS_SAMPLE_FLOAT); //open the song in decode float samples mode
//loop to fill data in the plugin
// Here we iterate over the frames, avoiding asking the numframes in case it's streaming input.
do {
int count;
if ((blockSize==stepSize) || (currentStep==0)) {
// read a full fresh block
count = BASS_ChannelGetData(stream, filebuf, blockSize );
if (count < 0)
{
cerr << "ERROR: sf_readf_float failed: " << endl;
break;
}
if (count != blockSize) --finalStepsRemaining;
} else {
// otherwise shunt the existing data down and read the remainder.
memmove(filebuf, filebuf + (stepSize * channels), overlapSize * channels * sizeof(float));
count = BASS_ChannelGetData(stream, filebuf + (overlapSize * channels ), stepSize );
if (count < 0) {
cerr << "ERROR: sf_readf_float failed: " << endl;
break;
}
if (count != stepSize) --finalStepsRemaining;
count += overlapSize;
}
for (int c = 0; c < channels; ++c) {
int j = 0;
while (j < count) {
plugbuf[c][j] = filebuf[j * info.chans + c];
++j;
}
while (j < blockSize) {
plugbuf[c][j] = 0.0f;
++j;
}
}
rt = RealTime::frame2RealTime(currentStep * stepSize, info.freq);
printFeatures
(RealTime::realTime2Frame(rt + adjustment, info.freq),
info.freq, outputNo, plugin->process(plugbuf, rt),
out, useFrames);
int frames;
frames = BASS_ChannelGetLength(stream, BASS_POS_BYTE);
if (frames > 0){
int pp = progress;
progress = (int)((float(currentStep * stepSize) / frames) * 100.f + 0.5f);
if (progress != pp && out) {
cerr << "\r" << progress << "%";
}
}
++currentStep;
} while (finalStepsRemaining > 0);
Can you helpme about this? What's wrong?
Best Regards,
DJ Joy
