小编six*_*six的帖子

这是一个发送MIDI数据的极其简单的CoreMIDI OS X应用程序.问题是它不起作用.编译好,并运行.它报告没有错误,并且不会崩溃.创建的源在MIDI监视器中可见.但是,没有MIDI数据出来.

有人能告诉我这里我做错了什么吗？

#include <CoreMIDI/CoreMIDI.h>

int main(int argc, char *args[])
{
    MIDIClientRef   theMidiClient;
    MIDIEndpointRef midiOut;
    MIDIPortRef     outPort;
    char pktBuffer[1024];
    MIDIPacketList* pktList = (MIDIPacketList*) pktBuffer;
    MIDIPacket     *pkt;
    Byte            midiDataToSend[] = {0x91, 0x3c, 0x40};
    int             i;

    MIDIClientCreate(CFSTR("Magical MIDI"), NULL, NULL,
                     &theMidiClient);
    MIDISourceCreate(theMidiClient, CFSTR("Magical MIDI Source"),
                     &midiOut);
    MIDIOutputPortCreate(theMidiClient, CFSTR("Magical MIDI Out Port"),
                         &outPort);

    pkt = MIDIPacketListInit(pktList);
    pkt = MIDIPacketListAdd(pktList, 1024, pkt, 0, 3, midiDataToSend);

    for (i = 0; i < 100; i++) {
        if (pkt == NULL || MIDISend(outPort, midiOut, …