float CBassAudio::GetSoundBPM ( void )
{
if ( m_fBPM == 0.0f && !m_bStream )
{
float fData = 0.0f;
// open the same file as played but for bpm decoding detection
DWORD bpmChan = BASS_StreamCreateFile ( false, m_strPath, 0, 0, BASS_STREAM_DECODE );
if ( !bpmChan )
{
bpmChan = BASS_MusicLoad ( false, m_strPath, 0, 0, BASS_MUSIC_DECODE|BASS_MUSIC_PRESCAN, 0 );
}
// detect bpm in background and return progress in GetBPM_ProgressCallback function
if ( bpmChan )
{
fData = BASS_FX_BPM_DecodeGet ( bpmChan, 0, GetLength ( ), 0, BASS_FX_FREESOURCE, NULL, NULL );
}
if ( BASS_ErrorGetCode ( ) != BASS_OK )
{
g_pCore->GetConsole ( )->Printf ( "BASS ERROR %d in BASS_FX_BPM_DecodeGet path:%s 3d:%d loop:%d", BASS_ErrorGetCode ( ), *m_strPath, m_b3D, m_bLoop );
}
else
{
m_fBPM = floor ( fData );
}
BASS_FX_BPM_BeatFree ( bpmChan );
}
return m_fBPM;
}
void DecodingBPM(BOOL newStream, double startSec, double endSec, const char *fp)
{
char c[30];
if (newStream){
// Open file for bpm decoding detection
hBPM = BASS_StreamCreateFile(FALSE, fp, 0, 0, BASS_STREAM_DECODE);
if (!hBPM) hBPM = BASS_MusicLoad(FALSE, fp, 0, 0, BASS_MUSIC_DECODE|BASS_MUSIC_PRESCAN, 0);
}
orgBPM = BASS_FX_BPM_DecodeGet(hBPM, startSec, endSec, 0, BASS_FX_BPM_BKGRND|BASS_FX_BPM_MULT2|BASS_FX_FREESOURCE, (BPMPROCESSPROC*)GetBPM_Process);
// don't bother to update the BPM view if it's zero
if (orgBPM) {
// update the bpm view
sprintf(c,"BPM: %0.2f", GetNewBPM(hBPM));
MESS(IDC_SBPM,WM_SETTEXT,0,c);
}
}
float BassPlayer::bpmCalc(const QUrl & uri) {
int cochan;
if (uri.isLocalFile())
cochan = open(uri.toLocalFile(), LOCAL_BPM_ATTRS);// BASS_StreamCreateFile(false, uri.toLocalFile().toStdWString().c_str(), 0, 0, LOCAL_BPM_ATTRS);
else
cochan = openRemote(uri.toString(), REMOTE_BPM_ATTRS); //BASS_StreamCreateURL(uri.toString().toStdString().c_str(), 0, REMOTE_BPM_ATTRS, NULL, 0);
if (cochan) {
int playBackDuration = BASS_ChannelBytes2Seconds(cochan, BASS_ChannelGetLength(cochan, BASS_POS_BYTE));
return BASS_FX_BPM_DecodeGet(cochan,
0,
playBackDuration,
MAKEWORD(20, 180),
BASS_FX_FREESOURCE, //BASS_FX_BPM_BKGRND // BASS_FX_BPM_MULT2
NULL, NULL
);
} else return 0;
}
