ios - 如何将 sysex 数据添加到 MusicTrack？ (音频工具箱)

Question

我正在尝试用二十一点等编写我的小型 MIDI 音序器，但仍坚持将 sysex 数据写入 MusicTrack。我使用以下代码插入 sysex 事件

// ---- Some code here --- //

PatternData pattern = { sizeof(PatternData), i, signature.numerator, signature.denominator };
CABarBeatTime beattime = CABarBeatTime((i * signature.numerator * signature.denominator) + 1, 1, 0, SUBBEAT_DIVISOR_DEFAULT);
// Convert beattime to timestamp 
if ((MusicSequenceBarBeatTimeToBeats(sequence, &beattime, &timestamp)) != noErr) 
{
return status; 
} 
// Add event 
if ((status = MusicTrackNewMIDIRawDataEvent(track, timestamp, (MIDIRawData*)&pattern)) != noErr) 
{ 
return status; 
}

// ---- Some code here --- //

模式数据是

typedef struct PatternData 
{ 
UInt32 length; // Struct length 
UInt8 index; // Pattern index 
UInt8 bars; // Number of bars in patten 
UInt8 beats; // Number of beats in pattern 
} PatternData;

我做错了什么，因为在调用 MusicSequenceFileCreate 之后我得到了损坏的文件。有人有如何将 sysex 数据添加到音乐轨道的示例吗？

Answer 1

好的。我找到了一个正确的方法，这就是:

    UInt8 data[] = { 0xF0, manufacturerId, databyte1, databyte2, databyte3, 0xF7 };
    MIDIRawData raw;
    memcpy(raw.data, data, 0, sizeof(data));
    raw.length = sizeof(data);

    if ((status = MusicTrackNewMIDIRawDataEvent(track, timestamp, &raw)) != noErr)
    {
        return status;
    }