JNIEXPORT void JNICALL
Java_com_sun_media_sound_MixerMidiChannel_nProgramChange__JIIJ(JNIEnv* e, jobject thisObj, jlong id, jint channelNumber, jint program, jlong tick) {
TRACE0("Java_com_sun_media_sound_MixerMidiChannel_nProgramChange.\n");
VTRACE1("-> id: %lu\n", id);
VTRACE3("-> channelNumber: %d, program: %d, tick: %lu\n", channelNumber, program, tick);
if (tick < 0)
{
/* talk directly to the synthesizer */
GM_ProgramChange((void *)e, (GM_Song *) (INT_PTR) id, (INT16)channelNumber, (INT16)program);
}
else
{
/* schedule with the sequencer */
QGM_ProgramChange((void *)e, (GM_Song *) (INT_PTR) id, (UINT32)tick, (INT16)channelNumber, (INT16)program);
}
TRACE0("Java_com_sun_media_sound_MixerMidiChannel_nProgramChange completed.\n");
}
static OPErr MixerSourceLineCallbackProc(void* context, GM_StreamMessage message, GM_StreamData* pAS)
{
JNIEnv* e = (JNIEnv*)context;
VTRACE2("MixerSourceLineCallbackProc, context: %lx, message: %d\n", context, message);
// for STREAM_CREATE, we just need to allocate the buffer.
// we need to convert from gmData->dataLength (number of frames) to number of bytes.
// $$kk: 03.15.98: this is the same calculation done by PV_GetSampleSizeInBytes. however, this
// method is not available outside GenAudioStreams.c right now.
if (message == STREAM_CREATE)
{
jint const byteCount = pAS->dataLength * pAS->channelSize * (pAS->dataBitSize / 8);
VTRACE1("STREAM_CREATE: %lx\n", pAS->userReference);
VTRACE3("STREAM_CREATE: byteCount = %d, dataLength = %lu, frameSize = %d.\n", byteCount, pAS->dataLength, (pAS->channelSize * (pAS->dataBitSize / 8)) );
pAS->pData = XNewPtr(byteCount);
if (!pAS->pData)
{
ERROR1("MixerSourceLineCallbackProc: STREAM_CREATE: Failed to allocate %d bytes\n", byteCount);
return MEMORY_ERR;
}
VTRACE1("STREAM_CREATE: %lx completed\n", pAS->userReference);
}
else if (message == STREAM_DESTROY)
{
VTRACE1("STREAM_DESTROY: %lx\n", pAS->userReference);
CallToJavaStreamDestroy(e, (jobject)pAS->userReference);
// $$kk: 12.21.98: for some reason, this causes the vm to crash some
// random time later. so we have a memory leak here. i don't know
// why we can't release the memory here....
// $$kk: 03.22.00: i am putting this code back in. the memory leak is
// causing problems, and so far i have not been able to reproduce the
// crash. the memory leak is reported in bug #4319431: "Memory leaks
// on opening and closing source DataLines."
if (pAS->pData)
{
XDisposePtr(pAS->pData);
}
VTRACE1("STREAM_DESTROY: %lx completed\n", pAS->userReference);
}
else if (message == STREAM_GET_DATA)
{
int length;
int frameLengthInBytes = pAS->channelSize * (pAS->dataBitSize / 8);
jbyteArray array = (jbyteArray)(*e)->GetObjectField(e, (jobject)pAS->userReference, g_dataArrayFieldID);
if (array == NULL)
{
ERROR0("STREAM_GET_DATA: failed to get array\n");
return GENERAL_BAD;
}
// make the callback.
// pAS->dataLength is the length in FRAMES.
// length returned is length in FRAMES.
length = (int)CallToJavaStreamGetData(e, (jobject)pAS->userReference, array, (jint)pAS->dataLength);
// length will be -1 when the stream finishes
if (length < 0)
{
VTRACE0("STREAM_GET_DATA: got negative length; stopping stream\n");
return STREAM_STOP_PLAY;
}
// get the relevant array elements
// $$kk: 03.15.98: can we avoid this copy??
(*e)->GetByteArrayRegion(e, array, (jint)0, (jint)(length * frameLengthInBytes), (jbyte*)(pAS->pData));
// $$kk: 04.21.00: fix for bug #4332327: "JNI leaks local references on
// keeping a SourceLine open for long."
(*e)->DeleteLocalRef(e, array);
// set dataLength to the number of frames read
pAS->dataLength = length;
VTRACE2("STREAM_GET_DATA: length: %d, pAS->dataLength: %lu\n", length, pAS->dataLength);
VTRACE1("STREAM_GET_DATA: %lx completed\n", pAS->userReference);
}
else if (message == STREAM_START)
{
TRACE2("STREAM_START: stream: %lx, framePosition: %lu\n", pAS->userReference, pAS->startSample);
CallToJavaStreamStart(e, (jobject)pAS->userReference);
TRACE1("STREAM_START: %lx completed\n", pAS->userReference);
}
else if (message == STREAM_STOP)
{
TRACE2("STREAM_STOP: %lx, framePosition: %lu\n", pAS->userReference, pAS->startSample);
CallToJavaStreamStop(e, (jobject)pAS->userReference);
TRACE1("STREAM_STOP: %lx completed\n", pAS->userReference);
}
else if (message == STREAM_EOM)
{
TRACE2("STREAM_EOM: %lx, framePosition: %lu\n", pAS->userReference, pAS->startSample);
CallToJavaStreamEOM(e, (jobject)pAS->userReference);
TRACE1("STREAM_EOM: %lx completed\n", pAS->userReference);
}
else if (message == STREAM_ACTIVE)
{
TRACE2("STREAM_ACTIVE: %lx, framePosition: %lu\n", pAS->userReference, pAS->startSample);
CallToJavaStreamActive(e, (jobject)pAS->userReference);
TRACE1("STREAM_ACTIVE: %lx completed\n", pAS->userReference);
}
else if (message == STREAM_INACTIVE)
{
TRACE2("STREAM_INACTIVE: %lx, framePosition: %lu\n", pAS->userReference, pAS->startSample);
CallToJavaStreamInactive(e, (jobject)pAS->userReference);
TRACE1("STREAM_INACTIVE: %lx completed\n", pAS->userReference);
}
else
{
ERROR1("Bad message code in MixerSourceLineCallbackProc() : %d\n", message);
return GENERAL_BAD;
}
return NO_ERR;
}