bool MidiPlayerThread::start( const QString &path, int volume, double seek /* = -1 */ )
{
qDebug() << "MidiPlayerThread::start";
unsigned short int mixer_options = 0;
m_path = path;
if ( open_alsa_output() == ( -1 ) ) {
qDebug() << "MidiPlayerThread::start: error of open_alsa_output()...";
return false;
}
if ( WildMidi_Init( qPrintable( m_configFile ), m_sample_rate, mixer_options ) < 0 ) {
qWarning( "MidiPlayerThread::start: unable to initialize WildMidi library" );
close_output();
return false;
}
m_midiPtr = WildMidi_Open ( qPrintable( m_path ) );
if ( !m_midiPtr ) {
qWarning("MidiPlayerThread::start: unable to open file");
WildMidi_Shutdown();
close_output();
return false;
}
Tracks audios;
audios.addID( 0 );
_WM_Info *wm_info = WildMidi_GetInfo( m_midiPtr );
m_totalTime = ( qint64 )wm_info->approx_total_samples / m_sample_rate;
qDebug() << "total time is " << m_totalTime << " sec";
m_md->reset();
m_md->duration = m_totalTime;
m_md->audio_rate = m_sample_rate;
m_md->novideo = true;
m_md->audios = audios;
// m_md->type = TYPE_FILE;
setVolume( volume );
if ( seek != ( -1 ) ) {
goToSec( seek );
}
QThread::start();
qDebug( "MidiPlayerThread: thread started" );
emit audioInfoChanged( audios );
return true;
}
void free()
{
if (s_initialized)
{
stop();
if (s_midiFormat == MFMT_GUS_PATCH)
{
WildMidi_Shutdown();
}
else if (s_midiFormat == MFMT_SOUND_FONT)
{
delete_fluid_settings(s_fluidSettings);
delete_fluid_synth(s_fluidSynth);
delete_fluid_sequencer(s_fluidSeq);
delete_fluid_player(s_fluidPlayer);
unloadFluidsynthDLL();
}
s_initialized = false;
delete s_mutex;
}
}
void MidiPlayerThread::play()
{
qDebug() << "MidiPlayerThread::play";
const unsigned long int buf_size = 4096;
int output_result = 0;
unsigned long int count_diff;
unsigned long int cur_sec, prev_sec;
m_inPause = false;
m_received_end_of_file = false;
cur_sec = 0;
QByteArray buf;
buf.resize( buf_size );
_WM_Info *wm_info = WildMidi_GetInfo( m_midiPtr );
m_md->list();
emit receivedStartingTime( 0 );
emit backendFullyLoaded();
emit receivedNoVideo();
qDebug() << "approx_total_samples is " << wm_info->approx_total_samples;
while ( 1 ) {
if ( m_isStop ) {
qDebug() << "MidiPlayerThread::play: m_isStop = " << m_isStop;
break;
}
count_diff = wm_info->approx_total_samples - wm_info->current_sample;
if ( count_diff == 0 ) {
qDebug() << "MidiPlayerThread::play: it is count_diff == 0";
break;
}
if ( m_inPause ) {
usleep( 1000 );
continue;
}
buf.fill( 0 );
if ( count_diff < buf_size ) {
buf.resize( count_diff * 4 );
output_result = WildMidi_GetOutput ( m_midiPtr, buf.data(), ( count_diff * 4 ) );
} else {
output_result = WildMidi_GetOutput ( m_midiPtr, buf.data(), buf_size );
}
if ( output_result <= 0 ) {
qDebug() << "MidiPlayerThread::play: output_result <= 0";
break;
}
prev_sec = wm_info->current_sample / m_sample_rate;
if ( prev_sec != cur_sec ) {
cur_sec = prev_sec;
emit receivedCurrentSec( cur_sec );
// qDebug() << "cur_sec is " << cur_sec;
}
send_output( buf.data(), output_result );
wm_info = WildMidi_GetInfo( m_midiPtr );
}
// buf.fill( 0, 16384 );
// send_output( buf.data(), 16384);
// buf.fill( 0, 16384 );
// send_output( buf.data(), 16384);
// send_output( buf.data(), 16384);
// usleep( 5000 );
if ( m_midiPtr ) {
// file was played
if ( WildMidi_Close( m_midiPtr ) == ( -1 ) ) {
qDebug() << "oops!";
}
m_midiPtr = 0;
}
WildMidi_Shutdown();
close_output();
// emit processExited();
m_received_end_of_file = true;
qDebug() << "MidiPlayerThread::play: end of play";
}
static void
wildmidi_finish(void)
{
WildMidi_Shutdown();
}
