Class: AudioToolbox::MusicTrack

Inherits:
Object
  • Object
show all
Includes:
Enumerable
Defined in:
lib/midiosx.rb,
ext/music_player/midiosx.c

Class Method Summary collapse

Instance Method Summary collapse

Constructor Details

#initialize ⇒ Object 



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# File 'ext/music_player/midiosx.c', line 460

static VALUE
track_init (int argc, VALUE *argv, VALUE self)
{
    VALUE rb_seq, rb_options;
    rb_scan_args(argc, argv, "11", &rb_seq, &rb_options);
    
    rb_iv_set(self, "@sequence", rb_seq);
    
    if (T_HASH == TYPE(rb_options)) {
        VALUE loop_info = rb_hash_aref(rb_options, rb_sLoopInfo),
              mute      = rb_hash_aref(rb_options, rb_sMute),
              solo      = rb_hash_aref(rb_options, rb_sSolo),
              length    = rb_hash_aref(rb_options, rb_sLength);
        
        if (!NIL_P(loop_info))
            rb_funcall(self, rb_intern("loop_info="), 1, loop_info);
        if (!NIL_P(mute))
            rb_funcall(self, rb_intern("mute="), 1, mute);
        if (!NIL_P(solo))
            rb_funcall(self, rb_intern("solo="), 1, solo);
        if (!NIL_P(length))
            rb_funcall(self, rb_intern("length="), 1, length);
    }
    
    return self;
}

Class Method Details

.new ⇒ Object 



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# File 'ext/music_player/midiosx.c', line 497

static VALUE
track_new (int argc, VALUE *argv, VALUE class)
{
    VALUE rb_seq, rb_options, rb_track, init_argv[2];
    MusicSequence *seq;
    MusicTrack *track;
    OSStatus err;
    
    rb_scan_args(argc, argv, "11", &rb_seq, &rb_options);
    Data_Get_Struct(rb_seq, MusicSequence, seq);
    
    rb_track = Data_Make_Struct(rb_cMusicTrack, MusicTrack, 0, track_free, track);
    require_noerr( err = MusicSequenceNewTrack(*seq, track), fail );
    init_argv[0] = rb_seq;
    init_argv[1] = rb_options;
    rb_obj_call_init(rb_track, 2, init_argv);
    return rb_track;

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

Instance Method Details

#add(time, message) ⇒ Object 



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# File 'lib/midiosx.rb', line 72

def add(time, message)
  message.add(time, self)
end

#add_extended_tempo_event ⇒ Object 



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# File 'ext/music_player/midiosx.c', line 621

static VALUE
track_add_extended_tempo_event (VALUE self, VALUE rb_at, VALUE rb_bpm)
{
    MusicTrack *track;
    MusicTimeStamp ts;
    Float64 bpm;
    OSStatus err;
    
    Data_Get_Struct(self, MusicTrack, track);
    
    if (PRIM_NUM_P(rb_at))
        ts = NUM2DBL(rb_at);
    else
        rb_raise(rb_eArgError, "Expected first arg to be a number.");
    
    if (PRIM_NUM_P(rb_bpm))
        bpm = NUM2DBL(rb_bpm);
    else
        rb_raise(rb_eArgError, "Expected second arg to be a number.");
    
    require_noerr( err = MusicTrackNewExtendedTempoEvent(*track, ts, bpm), fail );
    return Qnil;
    
    fail:
    RAISE_OSSTATUS(err, "MusicTrackNewExtendedTempoEvent()");
}

#add_midi_channel_message ⇒ Object 



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# File 'ext/music_player/midiosx.c', line 604

static VALUE
track_add_midi_channel_message (VALUE self, VALUE rb_at, VALUE rb_msg)
{
    MusicTrack *track;
    MIDIChannelMessage *msg;
    MusicTimeStamp ts = (MusicTimeStamp) NUM2DBL(rb_at);
    OSStatus err;
    
    Data_Get_Struct(self, MusicTrack, track);
    Data_Get_Struct(rb_msg, MIDIChannelMessage, msg);
    require_noerr( err = MusicTrackNewMIDIChannelEvent(*track, ts, msg), fail );
    return Qnil;
    
    fail:
    RAISE_OSSTATUS(err, "MusicTrackNewMIDIChannelEvent()");
}

#add_midi_note_message ⇒ Object 



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# File 'ext/music_player/midiosx.c', line 587

static VALUE
track_add_midi_note_message (VALUE self, VALUE rb_at, VALUE rb_msg)
{
    MusicTrack *track;
    MIDINoteMessage *msg;
    MusicTimeStamp ts = (MusicTimeStamp) NUM2DBL(rb_at);
    OSStatus err;
    
    Data_Get_Struct(self, MusicTrack, track);
    Data_Get_Struct(rb_msg, MIDINoteMessage, msg);
    require_noerr( err = MusicTrackNewMIDINoteEvent(*track, ts, msg), fail );
    return Qnil;

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

#each ⇒ Object 



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# File 'lib/midiosx.rb', line 86

def each
  i = iterator
  while i.current?
    yield i.event
    i.next
  end
  nil
end

#each_with_time ⇒ Object 



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# File 'lib/midiosx.rb', line 95

def each_with_time
  i = iterator
  while i.current?
    yield [i.event, i.time]
    i.next
  end
  nil
end

#iterator ⇒ Object 



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# File 'lib/midiosx.rb', line 80

def iterator
  MusicEventIterator.new(self)
end

#length ⇒ Object 



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# File 'ext/music_player/midiosx.c', line 812

static VALUE
track_get_length (VALUE self)
{
    MusicTrack *track;
    MusicTimeStamp length;
    UInt32 sz;
    OSStatus err;
    Data_Get_Struct(self, MusicTrack, track);
    
    require_noerr(
        err = MusicTrackGetProperty(*track, kSequenceTrackProperty_TrackLength,
                                    &length, &sz),
        fail);
    
    if (sz == sizeof(MusicTimeStamp))
        return rb_float_new(length);
    else
        return Qnil;
    
    fail:
    RAISE_OSSTATUS(err, "MusicTrackGetProperty()");
}

#length= ⇒ Object 



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# File 'ext/music_player/midiosx.c', line 835

static VALUE
track_set_length (VALUE self, VALUE rb_length)
{
    if (!PRIM_NUM_P(rb_length))
        rb_raise(rb_eTypeError, "Expected length to be a number.");
    MusicTrack *track;
    MusicTimeStamp length = NUM2DBL(rb_length);
    OSStatus err;
    Data_Get_Struct(self, MusicTrack, track);
    
    require_noerr(
        err = MusicTrackSetProperty(*track, kSequenceTrackProperty_TrackLength,
                                    &length, sizeof(MusicTimeStamp)),
        fail);
    
    return Qnil;
    
    fail:
    RAISE_OSSTATUS(err, "MusicTrackGetProperty()");
}

#loop_info ⇒ Object 



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# File 'ext/music_player/midiosx.c', line 648

static VALUE
track_get_loop_info (VALUE self)
{
    MusicTrack *track;
    UInt32 sz;
    MusicTrackLoopInfo loop_info;
    OSStatus err;
    Data_Get_Struct(self, MusicTrack, track);
    require_noerr( err = MusicTrackGetProperty(*track, kSequenceTrackProperty_LoopInfo, &loop_info, &sz), fail );

    if (sz == sizeof(MusicTrackLoopInfo)) {
        VALUE rb_loop_info = rb_hash_new();
        rb_hash_aset(rb_loop_info, rb_sDuration, rb_float_new(loop_info.loopDuration));
        rb_hash_aset(rb_loop_info, rb_sNumber, INT2NUM(loop_info.numberOfLoops));
        return rb_loop_info;
    } else {
        return Qnil;
    }
    
    fail:
    RAISE_OSSTATUS(err, "MusicTrackGetProperty()");
}

#loop_info= ⇒ Object 



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# File 'ext/music_player/midiosx.c', line 671

static VALUE
track_set_loop_info (VALUE self, VALUE rb_loop_info)
{
    Check_Type(rb_loop_info, T_HASH);
    MusicTrack *track;
    MusicTrackLoopInfo loop_info;
    OSStatus err;
    Data_Get_Struct(self, MusicTrack, track);
    loop_info.loopDuration = NUM2DBL(rb_hash_aref(rb_loop_info, rb_sDuration));
    loop_info.numberOfLoops = NUM2DBL(rb_hash_aref(rb_loop_info, rb_sNumber));
    
    require_noerr(
        err = MusicTrackSetProperty(*track, kSequenceTrackProperty_LoopInfo,
                                    &loop_info, sizeof(MusicTrackLoopInfo)),
        fail);
    
    return Qnil;
    
    fail:
    RAISE_OSSTATUS(err, "MusicTrackSetProperty()");
}

#mute ⇒ Object 



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# File 'ext/music_player/midiosx.c', line 733

static VALUE
track_get_mute (VALUE self)
{
    MusicTrack *track;
    UInt32 sz;
    Boolean status;
    OSStatus err;
    Data_Get_Struct(self, MusicTrack, track);
    require_noerr( err = MusicTrackGetProperty(*track, kSequenceTrackProperty_MuteStatus, &status, &sz), fail );
    
    if (sz == sizeof(Boolean))
        return status ? Qtrue : Qfalse;
    else
        return Qnil;
    
    fail:
    RAISE_OSSTATUS(err, "MusicTrackGetProperty()");
}

#mute= ⇒ Object 



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# File 'ext/music_player/midiosx.c', line 752

static VALUE
track_set_mute (VALUE self, VALUE rb_status)
{
    MusicTrack *track;
    Boolean status = RTEST(rb_status);
    OSStatus err;
    Data_Get_Struct(self, MusicTrack, track);
    
    require_noerr(
        err = MusicTrackSetProperty(*track, kSequenceTrackProperty_MuteStatus,
                                    &status, sizeof(Boolean)),
        fail);
    
    return Qnil;
    
    fail:
    RAISE_OSSTATUS(err, "MusicTrackSetProperty()");
}

#offset ⇒ Object 



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# File 'ext/music_player/midiosx.c', line 693

static VALUE
track_get_offset (VALUE self)
{
    MusicTrack *track;
    UInt32 sz;
    MusicTimeStamp offset;
    OSStatus err;
    Data_Get_Struct(self, MusicTrack, track);
    require_noerr( err = MusicTrackGetProperty(*track, kSequenceTrackProperty_OffsetTime, &offset, &sz), fail );
    
    if (sz == sizeof(MusicTimeStamp))
        return rb_float_new(offset);
    else
        return Qnil;
    
    fail:
    RAISE_OSSTATUS(err, "MusicTrackGetProperty()");
}

#offset= ⇒ Object 



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# File 'ext/music_player/midiosx.c', line 712

static VALUE
track_set_offset (VALUE self, VALUE rb_offset)
{
    if (!PRIM_NUM_P(rb_offset))
        rb_raise(rb_eTypeError, "Expected offset to be a number.");
    MusicTrack *track;
    MusicTimeStamp offset = NUM2DBL(rb_offset);
    OSStatus err;
    Data_Get_Struct(self, MusicTrack, track);
    
    require_noerr(
        err = MusicTrackSetProperty(*track, kSequenceTrackProperty_OffsetTime,
                                    &offset, sizeof(MusicTimeStamp)),
        fail);
    
    return Qnil;
    
    fail:
    RAISE_OSSTATUS(err, "MusicTrackSetProperty()");
}

#play(message) ⇒ Object 



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# File 'lib/midiosx.rb', line 76

def play(message)
    self.play_midi_event(message)
end

#play_midi_event(message) ⇒ Object 



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# File 'ext/music_player/midiosx.c', line 525

static VALUE
track_play_midi_event(VALUE self, VALUE message)
{
    MusicTrack *track;
    MusicSequence seq;
    AUGraph graph;
    unsigned int count;
    AUNode node;
    AudioComponentDescription desc;
    int i;
    AudioUnit *synthUnit;
    OSStatus err;
    VALUE status, data1, data2;
    VALUE synth;

    Data_Get_Struct(self, MusicTrack, track);
    __Require_noErr(err = MusicTrackGetSequence(*track, &seq), fail1);
    __Require_noErr(err = MusicSequenceGetAUGraph(seq, &graph), fail2);
    __Require_noErr(err = AUGraphGetNodeCount(graph, &count), fail3);
    synth = Data_Make_Struct(rb_cAudioUnit, AudioUnit, 0, audio_unit_free, synthUnit);
    for ( i = 0; i < count; i++) {
        __Require_noErr(err = AUGraphGetIndNode(graph, i, &node), fail4);
        __Require_noErr(err = AUGraphNodeInfo(graph, node, &desc, synthUnit), fail5);
        if (desc.componentType == kAudioUnitType_MusicDevice &&
            desc.componentSubType == kAudioUnitSubType_DLSSynth) break;
    }
    if ( i < count ) {
/*        status = rb_funcall(message, rb_intern("status"), 0);
        data1 = rb_funcall(message, rb_intern("data1"), 0);
        data2 = rb_funcall(message, rb_intern("data2"), 0);
*/
        if ( rb_obj_is_kind_of(message, rb_cMIDINoteMessage) == Qtrue ) {
            status = FIX2UINT(midi_note_message_status(message));
            data1 = FIX2UINT(midi_note_message_data1(message));
            data2 = FIX2UINT(midi_note_message_data2(message));
        }
        else {
            status = FIX2UINT(midi_channel_message_status(message));
            data1 = FIX2UINT(midi_channel_message_data1(message));
            data2 = FIX2UINT(midi_channel_message_data2(message));
        }
/*        printf("status: %08lx, data1: %08lx, data2: %08lx\n", status, data1, data2); debug */
        __Require_noErr(err = MusicDeviceMIDIEvent(*synthUnit,
                         status, data1, data2, 0/*sample offset*/),
                        fail);
        return synth;
    }

fail1:
    RAISE_OSSTATUS(err, "MusicTrackGetSequence()");
fail2:
    RAISE_OSSTATUS(err, "MusicSequenceGetAUGraph()");
fail3:
    RAISE_OSSTATUS(err, "AUGraphGetNodeCount()");
fail4:
    RAISE_OSSTATUS(err, "AUGraphGetIndNode()");
fail5:
    RAISE_OSSTATUS(err, "AUGraphNodeInfo()");
fail:
    RAISE_OSSTATUS(err, "MusicDeviceMIDIEvent()");
}

#resolution ⇒ Object 



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# File 'ext/music_player/midiosx.c', line 856

static VALUE
track_get_resolution (VALUE self)
{
    MusicTrack *track;
    SInt16 res;
    UInt32 sz;
    OSStatus err;
    Data_Get_Struct(self, MusicTrack, track);
    
    require_noerr(
        err = MusicTrackGetProperty(*track, kSequenceTrackProperty_TimeResolution, &res, &sz),
        fail);
    
    if (sz == sizeof(SInt16))
        return INT2FIX(res);
    else
        return Qnil;

    fail:
    if (paramErr == err)
        rb_raise(rb_eArgError, "Resolution is only available to the tempo track.");
    else
        RAISE_OSSTATUS(err, "MusicTrackGetProperty()");
}

#solo ⇒ Object 



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# File 'ext/music_player/midiosx.c', line 771

static VALUE
track_get_solo (VALUE self)
{
    MusicTrack *track;
    UInt32 sz;
    Boolean status;
    OSStatus err;
    Data_Get_Struct(self, MusicTrack, track);
    require_noerr(
        err = MusicTrackGetProperty(*track, kSequenceTrackProperty_SoloStatus,
                                    &status, &sz),
        fail );
    
    if (sz == sizeof(Boolean))
        return status ? Qtrue : Qfalse;
    else
        return Qnil;
    
    fail:
    RAISE_OSSTATUS(err, "MusicTrackGetProperty()");
}

#solo= ⇒ Object 



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# File 'ext/music_player/midiosx.c', line 793

static VALUE
track_set_solo (VALUE self, VALUE rb_status)
{
    MusicTrack *track;
    Boolean status = RTEST(rb_status);
    OSStatus err;
    Data_Get_Struct(self, MusicTrack, track);
    
    require_noerr(
        err = MusicTrackSetProperty(*track, kSequenceTrackProperty_SoloStatus,
                                    &status, sizeof(Boolean)),
        fail);
    
    return Qnil;
    
    fail:
    RAISE_OSSTATUS(err, "MusicTrackSetProperty()");
}