Class: AudioToolbox::MusicEventIterator

Inherits:
Object
  • Object
show all
Defined in:
ext/music_player/midiosx.c

Instance Method Summary collapse

Constructor Details

#initialize ⇒ Object 



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# File 'ext/music_player/midiosx.c', line 1223

static VALUE
iter_init (VALUE self, VALUE rb_track)
{
    MusicTrack *track;
    MusicEventIterator *iter;
    OSStatus err;
    Data_Get_Struct(rb_track, MusicTrack, track);
    Data_Get_Struct(self, MusicEventIterator, iter);
    require_noerr( err = NewMusicEventIterator(*track, iter), fail );
    return self;
    
    fail:
    RAISE_OSSTATUS(err, "NewMusicEventIterator()");
}

Instance Method Details

#current? ⇒ Boolean

Returns:

  • (Boolean) 


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# File 'ext/music_player/midiosx.c', line 1282

static VALUE
iter_has_current (VALUE self)
{
    MusicEventIterator *iter;
    Boolean has_cur;
    OSStatus err;
    Data_Get_Struct(self, MusicEventIterator, iter);
    require_noerr( err = MusicEventIteratorHasCurrentEvent(*iter, &has_cur), fail );
    return has_cur ? Qtrue : Qfalse;
    
    fail:
    RAISE_OSSTATUS(err, "MusicEventIteratorHasCurrentEvent()");
}

#delete ⇒ Object 



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# File 'ext/music_player/midiosx.c', line 1412

static VALUE
iter_delete_event (VALUE self)
{
    MusicEventIterator *iter;
    OSStatus err;
    Data_Get_Struct(self, MusicEventIterator, iter);
    require_noerr( err = MusicEventIteratorDeleteEvent(*iter), fail );
    return Qnil;
    
    fail:
    RAISE_OSSTATUS(err, "MusicEventIteratorDeleteEvent()");
}

#event ⇒ Object 



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# File 'ext/music_player/midiosx.c', line 1352

static VALUE
iter_get_event (VALUE self)
{
    MusicEventIterator *iter;
    MusicEventType type;
    const void *data;
    OSStatus err;
    Data_Get_Struct(self, MusicEventIterator, iter);
    require_noerr( err = MusicEventIteratorGetEventInfo(*iter, NULL, &type, &data, NULL), fail );
    
    switch(type) {
    case kMusicEventType_NULL:
        return Qnil;
    case kMusicEventType_MIDINoteMessage:
        return midi_note_message_from_const((MIDINoteMessage*) data);
    case kMusicEventType_MIDIChannelMessage:
        return midi_channel_message_from_const((MIDIChannelMessage*) data);
    case kMusicEventType_ExtendedTempo:
        return tempo_from_const((ExtendedTempoEvent*) data);
    default:
        rb_raise(rb_eNotImpError, "Unsupported event type.");
        break;
    }
    
    fail:
    RAISE_OSSTATUS(err, "MusicEventIteratorGetEventInfo()");
}

#event= ⇒ Object 



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# File 'ext/music_player/midiosx.c', line 1380

static VALUE
iter_set_event (VALUE self, VALUE rb_msg)
{
    MusicEventIterator *iter;
    MusicEventType type;
    const void *data;
    OSStatus err;
    
    Data_Get_Struct(self, MusicEventIterator, iter);
    
    if (THRQL(rb_cMIDINoteMessage, rb_msg)) {
        type = kMusicEventType_MIDINoteMessage;
        Data_Get_Struct(rb_msg, MIDINoteMessage, data);
    } else if (THRQL(rb_cMIDIChannelMessage, rb_msg)) {
        type = kMusicEventType_MIDIChannelMessage;
        Data_Get_Struct(rb_msg, MIDIChannelMessage, data);
    } else if (THRQL(rb_cExtendedTempoEvent, rb_msg)) {
        type = kMusicEventType_ExtendedTempo;
        ExtendedTempoEvent tmp;
        tmp.bpm = NUM2DBL(rb_funcall(rb_msg, rb_intern("bpm"), 0));
        data = &tmp;
    } else {
        rb_raise(rb_eTypeError, "Unrecognized event type");
    }
    
    require_noerr( err = MusicEventIteratorSetEventInfo(*iter, type, data), fail );
    return Qnil;
    
    fail:
    RAISE_OSSTATUS(err, "MusicEventIteratorSetEventInfo()");
}

#next ⇒ Object 



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# File 'ext/music_player/midiosx.c', line 1256

static VALUE
iter_next (VALUE self)
{
    MusicEventIterator *iter;
    OSStatus err;
    Data_Get_Struct(self, MusicEventIterator, iter);
    require_noerr( err = MusicEventIteratorNextEvent(*iter), fail );
    return Qnil;
    
    fail:
    RAISE_OSSTATUS(err, "MusicEventIteratorNextEvent()");
}

#next? ⇒ Boolean

Returns:

  • (Boolean) 


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# File 'ext/music_player/midiosx.c', line 1310

static VALUE
iter_has_next (VALUE self)
{
    MusicEventIterator *iter;
    Boolean has_next;
    OSStatus err;
    Data_Get_Struct(self, MusicEventIterator, iter);
    require_noerr( err = MusicEventIteratorHasNextEvent(*iter, &has_next), fail );
    return has_next ? Qtrue : Qfalse;
    
    fail:
    RAISE_OSSTATUS(err, "MusicEventIteratorHasNextEvent()");
}

#prev ⇒ Object 



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# File 'ext/music_player/midiosx.c', line 1269

static VALUE
iter_prev (VALUE self)
{
    MusicEventIterator *iter;
    OSStatus err;
    Data_Get_Struct(self, MusicEventIterator, iter);
    require_noerr( err = MusicEventIteratorPreviousEvent(*iter), fail );
    return Qnil;
    
    fail:
    RAISE_OSSTATUS(err, "MusicEventIteratorPreviousEvent()");
}

#prev? ⇒ Boolean

Returns:

  • (Boolean) 


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# File 'ext/music_player/midiosx.c', line 1296

static VALUE
iter_has_prev (VALUE self)
{
    MusicEventIterator *iter;
    Boolean has_prev;
    OSStatus err;
    Data_Get_Struct(self, MusicEventIterator, iter);
    require_noerr( err = MusicEventIteratorHasPreviousEvent(*iter, &has_prev), fail );
    return has_prev ? Qtrue : Qfalse;
    
    fail:
    RAISE_OSSTATUS(err, "MusicEventIteratorHasPreviousEvent()");
}

#seek ⇒ Object 



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# File 'ext/music_player/midiosx.c', line 1238

static VALUE
iter_seek (VALUE self, VALUE rb_time)
{
    MusicEventIterator *iter;
    MusicTimeStamp ts;
    OSStatus err;
    Data_Get_Struct(self, MusicEventIterator, iter);
    if (PRIM_NUM_P(rb_time))
        ts = NUM2DBL(rb_time);
    else
        rb_raise(rb_eArgError, "Expected first arg to be a number.");
    require_noerr( err = MusicEventIteratorSeek(*iter, ts), fail );
    return Qnil;

    fail:
    RAISE_OSSTATUS(err, "MusicEventIteratorSeek()");
}

#time ⇒ Object 



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# File 'ext/music_player/midiosx.c', line 1324

static VALUE
iter_get_time (VALUE self)
{
    MusicEventIterator *iter;
    MusicTimeStamp ts;
    OSStatus err;
    Data_Get_Struct(self, MusicEventIterator, iter);
    require_noerr( err = MusicEventIteratorGetEventInfo(*iter, &ts, NULL, NULL, NULL), fail );
    return rb_float_new(ts);
    
    fail:
    RAISE_OSSTATUS(err, "MusicEventIteratorGetEventInfo()");
}

#time= ⇒ Object 



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# File 'ext/music_player/midiosx.c', line 1338

static VALUE
iter_set_time (VALUE self, VALUE rb_time)
{
    MusicEventIterator *iter;
    MusicTimeStamp ts = NUM2DBL(rb_time);
    OSStatus err;
    Data_Get_Struct(self, MusicEventIterator, iter);
    require_noerr( err = MusicEventIteratorSetEventTime(*iter, ts), fail );
    return Qnil;
    
    fail:
    RAISE_OSSTATUS(err, "MusicEventIteratorSetEventTime()");
}