/*
* S_AdvanceBackgroundTrack
*/
static bool S_AdvanceBackgroundTrack( int n ) {
bgTrack_t *track;
if( n < 0 ) {
track = S_PrevMusicTrack( s_bgTrack );
} else {
track = S_NextMusicTrack( s_bgTrack );
}
if( track && track != s_bgTrack ) {
S_CloseBackgroundTrackTask();
S_CloseMusicTrack( s_bgTrack );
S_OpenBackgroundTrackTask( track );
return true;
}
return false;
}
/*
* S_AdvanceBackgroundTrack
*/
static qboolean S_AdvanceBackgroundTrack( int n )
{
bgTrack_t *track;
if( n < 0 )
track = S_PrevMusicTrack( s_bgTrack );
else
track = S_NextMusicTrack( s_bgTrack );
if( track && track != s_bgTrack )
{
if( s_bgTrack->isUrl )
S_CloseMusicTrack( s_bgTrack );
s_bgTrack = track;
return qtrue;
}
return qfalse;
}
void S_StartBackgroundTrack( const char *intro, const char *loop )
{
int count;
const char *ext;
bgTrack_t *t, f;
bgTrack_t *introTrack, *loopTrack;
ALenum error;
int mode = 0;
// Stop any existing music that might be playing
S_StopBackgroundTrack();
if( !intro || !intro[0] )
return;
s_bgTrackPaused = qfalse;
ext = COM_FileExtension( intro );
if( ext && !Q_stricmp( ext, ".m3u" ) )
{
// mode bits:
// 1 - shuffle
// 2 - loop the selected track
if( loop && loop[0] )
mode = atoi( loop );
if( S_ReadPlaylistFile( intro, mode & 1 ? qtrue : qfalse ) )
goto start_playback;
}
// the intro track loops unless another loop track has been specified
introTrack = S_AllocTrack( intro );
introTrack->next = introTrack->prev = introTrack;
if( loop && loop[0] && Q_stricmp( intro, loop ) )
{
loopTrack = S_AllocTrack( loop );
if( S_OpenMusicTrack( loopTrack ) )
{
S_CloseMusicTrack( loopTrack );
loopTrack->next = introTrack->next = introTrack->prev = loopTrack;
loopTrack->prev = introTrack;
}
}
s_bgTrack = introTrack;
start_playback:
// this effectively precaches the first 15 scheduled tracks in the playlist
for( count = 0, t = s_bgTrack; count < 15 && t && t != s_bgTrack; count++ )
{
if( !t->isUrl )
{
S_OpenMusicTrack( t );
if( t->next == t || t->next == s_bgTrack )
break; // break on an endless loop or full cycle
if( !t->ignore && ( mode & 2 ) )
{
// no point in precaching the whole playlist when we're only going
// to loop one single track
break;
}
}
t = t->next;
}
// start playback with the first valid track
if( count > 1 )
{
memset( &f, 0, sizeof( f ) );
f.next = s_bgTrack;
s_bgTrack = S_NextMusicTrack( &f );
}
else
{
S_OpenMusicTrack( s_bgTrack );
}
if( !s_bgTrack || s_bgTrack->ignore )
{
S_StopBackgroundTrack();
return;
}
if( mode & 2 )
{
// loop the same track over and over
s_bgTrack->next = s_bgTrack->prev = s_bgTrack;
}
music_source_get();
if( !src )
{
Com_Printf( "Error couldn't get source for music\n" );
S_StopBackgroundTrack();
return;
}
alloced_buffers = qfalse;
queued_buffers = qfalse;
qalGenBuffers( MUSIC_BUFFERS, buffers );
if( ( error = qalGetError() ) != AL_NO_ERROR )
{
Com_Printf( "Error couldn't generate music buffers (%s)\n", S_ErrorMessage( error ) );
S_StopBackgroundTrack();
return;
}
alloced_buffers = qtrue;
}
