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https://github.com/openjdk/jdk.git
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261 lines
9.9 KiB
C
261 lines
9.9 KiB
C
/*
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* Copyright (c) 1999, 2007, Oracle and/or its affiliates. All rights reserved.
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* DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
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*
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* This code is free software; you can redistribute it and/or modify it
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* under the terms of the GNU General Public License version 2 only, as
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* published by the Free Software Foundation. Oracle designates this
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* particular file as subject to the "Classpath" exception as provided
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* by Oracle in the LICENSE file that accompanied this code.
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*
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* This code is distributed in the hope that it will be useful, but WITHOUT
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* ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
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* FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License
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* version 2 for more details (a copy is included in the LICENSE file that
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* accompanied this code).
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*
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* You should have received a copy of the GNU General Public License version
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* 2 along with this work; if not, write to the Free Software Foundation,
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* Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA.
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*
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* Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA
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* or visit www.oracle.com if you need additional information or have any
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* questions.
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*/
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/*****************************************************************************/
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/*
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** Native functions for interfacing Java with the native implementation
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** of PlatformMidi.h's functions.
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*/
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/*****************************************************************************/
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#define USE_ERROR
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#define USE_TRACE
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#include <jni.h>
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/* for memcpy */
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#include <string.h>
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#include "SoundDefs.h"
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#include "PlatformMidi.h"
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#include "com_sun_media_sound_MidiInDevice.h"
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JNIEXPORT jlong JNICALL
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Java_com_sun_media_sound_MidiInDevice_nOpen(JNIEnv* e, jobject thisObj, jint index) {
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MidiDeviceHandle* deviceHandle = NULL;
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INT32 err = MIDI_NOT_SUPPORTED;
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TRACE1("> Java_com_sun_media_sound_MidiInDevice_nOpen: index: %d\n", index);
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#if USE_PLATFORM_MIDI_IN == TRUE
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err = MIDI_IN_OpenDevice((INT32) index, &deviceHandle);
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#endif
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/* $$mp 2003-08-28:
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So far, the return value (err) hasn't been taken into account.
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Now, it is also expected to be MIDI_SUCCESS (0).
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This works for Linux, but has to be checked on other platforms.
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It would be better to settle on one method of signaling error:
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either returned error codes or a NULL handle. If the latter is used,
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the return value should be removed from the signature of
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MIDI_IN_OpenDevice.
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*/
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// if we didn't get a valid handle, throw a MidiUnavailableException
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if (!deviceHandle || err != MIDI_SUCCESS) {
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deviceHandle = NULL;
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ERROR0("Java_com_sun_media_sound_MidiInDevice_nOpen: ");
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ThrowJavaMessageException(e, JAVA_MIDI_PACKAGE_NAME"/MidiUnavailableException",
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MIDI_IN_InternalGetErrorString(err));
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} else {
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TRACE0("< Java_com_sun_media_sound_MidiInDevice_nOpen succeeded\n");
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}
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return (jlong) (UINT_PTR) deviceHandle;
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}
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JNIEXPORT void JNICALL
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Java_com_sun_media_sound_MidiInDevice_nClose(JNIEnv* e, jobject thisObj, jlong deviceHandle) {
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TRACE0("> Java_com_sun_media_sound_MidiInDevice_nClose.\n");
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#if USE_PLATFORM_MIDI_IN == TRUE
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MIDI_IN_CloseDevice((MidiDeviceHandle*) (UINT_PTR) deviceHandle);
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#endif
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TRACE0("< Java_com_sun_media_sound_MidiInDevice_nClose succeeded\n");
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}
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JNIEXPORT void JNICALL
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Java_com_sun_media_sound_MidiInDevice_nStart(JNIEnv* e, jobject thisObj, jlong deviceHandle) {
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INT32 err = MIDI_NOT_SUPPORTED;
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TRACE0("> Java_com_sun_media_sound_MidiInDevice_nStart.\n");
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#if USE_PLATFORM_MIDI_IN == TRUE
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err = MIDI_IN_StartDevice((MidiDeviceHandle*) (UINT_PTR) deviceHandle);
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#endif
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if (err != MIDI_SUCCESS) {
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ERROR0("Java_com_sun_media_sound_MidiInDevice_nStart: ");
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ThrowJavaMessageException(e, JAVA_MIDI_PACKAGE_NAME"/MidiUnavailableException",
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MIDI_IN_InternalGetErrorString(err));
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} else {
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TRACE0("< Java_com_sun_media_sound_MidiInDevice_nStart succeeded\n");
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}
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}
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JNIEXPORT void JNICALL
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Java_com_sun_media_sound_MidiInDevice_nStop(JNIEnv* e, jobject thisObj, jlong deviceHandle) {
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TRACE0("> Java_com_sun_media_sound_MidiInDevice_nStop.\n");
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#if USE_PLATFORM_MIDI_IN == TRUE
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// stop the device and remove all queued events for this device handle
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MIDI_IN_StopDevice((MidiDeviceHandle*) (UINT_PTR) deviceHandle);
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#endif
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TRACE0("< Java_com_sun_media_sound_MidiInDevice_nStop succeeded\n");
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}
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JNIEXPORT jlong JNICALL
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Java_com_sun_media_sound_MidiInDevice_nGetTimeStamp(JNIEnv* e, jobject thisObj, jlong deviceHandle) {
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jlong ret = -1;
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TRACE0("Java_com_sun_media_sound_MidiInDevice_nGetTimeStamp.\n");
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#if USE_PLATFORM_MIDI_IN == TRUE
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ret = (jlong) MIDI_IN_GetTimeStamp((MidiDeviceHandle*) (UINT_PTR) deviceHandle);
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#endif
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/* Handle error codes. */
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if (ret < -1) {
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ERROR1("Java_com_sun_media_sound_MidiInDevice_nGetTimeStamp: MIDI_IN_GetTimeStamp returned %lld\n", ret);
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ret = -1;
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}
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return ret;
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}
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JNIEXPORT void JNICALL
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Java_com_sun_media_sound_MidiInDevice_nGetMessages(JNIEnv* e, jobject thisObj, jlong deviceHandle) {
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#if USE_PLATFORM_MIDI_IN == TRUE
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MidiMessage* pMessage;
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jclass javaClass = NULL;
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jmethodID callbackShortMessageMethodID = NULL;
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jmethodID callbackLongMessageMethodID = NULL;
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#endif
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TRACE0("> Java_com_sun_media_sound_MidiInDevice_nGetMessages\n");
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#if USE_PLATFORM_MIDI_IN == TRUE
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while ((pMessage = MIDI_IN_GetMessage((MidiDeviceHandle*) (UINT_PTR) deviceHandle))) {
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if ((javaClass == NULL) || (callbackShortMessageMethodID == NULL)) {
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if (!thisObj) {
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ERROR0("MidiInDevice: Java_com_sun_media_sound_MidiInDevice_nGetMessages: thisObj is NULL\n");
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return;
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}
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if (javaClass == NULL) {
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javaClass = (*e)->GetObjectClass(e, thisObj);
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if (javaClass == NULL) {
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ERROR0("MidiInDevice: Java_com_sun_media_sound_MidiInDevice_nGetMessages: javaClass is NULL\n");
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return;
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}
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}
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if (callbackShortMessageMethodID == NULL) {
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// save the callbackShortMessage callback method id.
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// this is valid as long as the class is not unloaded.
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callbackShortMessageMethodID = (*e)->GetMethodID(e, javaClass, "callbackShortMessage", "(IJ)V");
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if (callbackShortMessageMethodID == 0) {
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ERROR0("MidiInDevice: Java_com_sun_media_sound_MidiInDevice_nGetMessages: callbackShortMessageMethodID is 0\n");
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return;
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}
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}
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if (callbackLongMessageMethodID == NULL) {
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// save the callbackLongMessage callback method id.
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// this is valid as long as the class is not unloaded.
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callbackLongMessageMethodID = (*e)->GetMethodID(e, javaClass, "callbackLongMessage", "([BJ)V");
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if (callbackLongMessageMethodID == 0) {
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ERROR0("MidiInDevice: Java_com_sun_media_sound_MidiInDevice_nGetMessages: callbackLongMessageMethodID is 0\n");
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return;
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}
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}
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}
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switch ((int)pMessage->type) {
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case SHORT_MESSAGE: {
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jint msg = (jint)pMessage->data.s.packedMsg;
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jlong ts = (jlong)pMessage->timestamp;
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TRACE0("Java_com_sun_media_sound_MidiInDevice_nGetMessages: got SHORT_MESSAGE\n");
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// now we can put this message object back in the queue
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MIDI_IN_ReleaseMessage((MidiDeviceHandle*) (UINT_PTR) deviceHandle, pMessage);
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// and notify Java space
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(*e)->CallVoidMethod(e, thisObj, callbackShortMessageMethodID, msg, ts);
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break;
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}
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case LONG_MESSAGE: {
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jlong ts = (jlong)pMessage->timestamp;
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jbyteArray jData;
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UBYTE* data;
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int isSXCont = 0;
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TRACE0("Java_com_sun_media_sound_MidiInDevice_nGetMessages: got LONG_MESSAGE\n");
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if ((*(pMessage->data.l.data) != 0xF0)
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&& (*(pMessage->data.l.data) != 0xF7)) {
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// this is a continued sys ex message
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// need to prepend 0xF7
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isSXCont = 1;
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}
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jData = (*e)->NewByteArray(e, pMessage->data.l.size + isSXCont);
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if (!jData) {
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ERROR0("Java_com_sun_media_sound_MidiInDevice_nGetMessages: cannot create long byte array.\n");
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break;
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}
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data = (UBYTE*) ((*e)->GetByteArrayElements(e, jData, NULL));
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if (!data) {
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ERROR0("MidiInDevice: Java_com_sun_media_sound_MidiInDevice_nGetMessages: array data is NULL\n");
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break;
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}
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// finally copy the long message
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memcpy(data + isSXCont, pMessage->data.l.data, pMessage->data.l.size);
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// now we can put this message object back in the queue
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MIDI_IN_ReleaseMessage((MidiDeviceHandle*) (UINT_PTR) deviceHandle, pMessage);
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// if this is a patched continued sys ex message, prepend 0xF7
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if (isSXCont) {
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*data = 0xF7;
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}
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// commit the byte array
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(*e)->ReleaseByteArrayElements(e, jData, (jbyte*) data, (jint) 0);
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(*e)->CallVoidMethod(e, thisObj, callbackLongMessageMethodID, jData, ts);
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// release local reference to array: not needed anymore.
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(*e)->DeleteLocalRef(e, jData);
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break;
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}
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default:
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// put this message object back in the queue
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MIDI_IN_ReleaseMessage((MidiDeviceHandle*) (UINT_PTR) deviceHandle, pMessage);
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ERROR1("Java_com_sun_media_sound_MidiInDevice_nGetMessages: got unsupported message, type %d\n", pMessage->type);
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break;
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} // switch
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}
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#endif // USE_PLATFORM_MIDI_IN
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TRACE0("< Java_com_sun_media_sound_MidiInDevice_nGetMessages returning\n");
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}
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