--- /dev/null Thu Jan 01 00:00:00 1970 +0000
+++ b/src/java.desktop/linux/native/libjsound/PLATFORM_API_LinuxOS_ALSA_MidiIn.c Fri Mar 23 09:51:02 2018 +0100
@@ -0,0 +1,354 @@
+/*
+ * Copyright (c) 2003, 2010, Oracle and/or its affiliates. All rights reserved.
+ * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
+ *
+ * This code is free software; you can redistribute it and/or modify it
+ * under the terms of the GNU General Public License version 2 only, as
+ * published by the Free Software Foundation. Oracle designates this
+ * particular file as subject to the "Classpath" exception as provided
+ * by Oracle in the LICENSE file that accompanied this code.
+ *
+ * This code is distributed in the hope that it will be useful, but WITHOUT
+ * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
+ * FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License
+ * version 2 for more details (a copy is included in the LICENSE file that
+ * accompanied this code).
+ *
+ * You should have received a copy of the GNU General Public License version
+ * 2 along with this work; if not, write to the Free Software Foundation,
+ * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA.
+ *
+ * Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA
+ * or visit www.oracle.com if you need additional information or have any
+ * questions.
+ */
+
+#define USE_ERROR
+#define USE_TRACE
+
+#if USE_PLATFORM_MIDI_IN == TRUE
+
+
+#include <alsa/asoundlib.h>
+#include "PlatformMidi.h"
+#include "PLATFORM_API_LinuxOS_ALSA_MidiUtils.h"
+#if defined(i586)
+#include <sys/utsname.h>
+#endif
+
+/*
+ * Helper methods
+ */
+
+static inline UINT32 packMessage(int status, int data1, int data2) {
+ return ((status & 0xFF) | ((data1 & 0xFF) << 8) | ((data2 & 0xFF) << 16));
+}
+
+
+static void setShortMessage(MidiMessage* message,
+ int status, int data1, int data2) {
+ message->type = SHORT_MESSAGE;
+ message->data.s.packedMsg = packMessage(status, data1, data2);
+}
+
+
+static void setRealtimeMessage(MidiMessage* message, int status) {
+ setShortMessage(message, status, 0, 0);
+}
+
+
+static void set14bitMessage(MidiMessage* message, int status, int value) {
+ TRACE3("14bit value: %d, lsb: %d, msb: %d\n", value, value & 0x7F, (value >> 7) & 0x7F);
+ value &= 0x3FFF;
+ TRACE3("14bit value (2): %d, lsb: %d, msb: %d\n", value, value & 0x7F, (value >> 7) & 0x7F);
+ setShortMessage(message, status,
+ value & 0x7F,
+ (value >> 7) & 0x7F);
+}
+
+
+/*
+ * implementation of the platform-dependent
+ * MIDI in functions declared in PlatformMidi.h
+ */
+
+char* MIDI_IN_GetErrorStr(INT32 err) {
+ return (char*) getErrorStr(err);
+}
+
+INT32 MIDI_IN_GetNumDevices() {
+/* Workaround for 6842956: 32bit app on 64bit linux
+ * gets assertion failure trying to open midiIn ports.
+ * Untill the issue is fixed in ALSA
+ * (https://bugtrack.alsa-project.org/alsa-bug/view.php?id=4807)
+ * report no midi in devices in the configuration.
+ */
+#if defined(i586)
+ static int jre32onlinux64 = -1;
+ if (jre32onlinux64 < 0) {
+ jre32onlinux64 = 0;
+ /* The workaround may be disabled setting "JAVASOUND_ENABLE_MIDIIN"
+ * environment variable.
+ */
+ if (getenv("JAVASOUND_ENABLE_MIDIIN") == NULL) {
+ struct utsname u;
+ jre32onlinux64 = 0;
+ if (uname(&u) == 0) {
+ if (strstr(u.machine, "64") != NULL) {
+ TRACE0("jre32 on linux64 detected - report no midiIn devices\n");
+ jre32onlinux64 = 1;
+ }
+ }
+ }
+ }
+ if (jre32onlinux64) {
+ return 0;
+ }
+#endif
+
+ TRACE0("MIDI_IN_GetNumDevices()\n");
+
+ return getMidiDeviceCount(SND_RAWMIDI_STREAM_INPUT);
+}
+
+
+INT32 MIDI_IN_GetDeviceName(INT32 deviceIndex, char *name, UINT32 nameLength) {
+ int ret = getMidiDeviceName(SND_RAWMIDI_STREAM_INPUT, deviceIndex,
+ name, nameLength);
+ return ret;
+}
+
+
+INT32 MIDI_IN_GetDeviceVendor(INT32 deviceIndex, char *name, UINT32 nameLength) {
+ int ret = getMidiDeviceVendor(deviceIndex, name, nameLength);
+ return ret;
+}
+
+
+INT32 MIDI_IN_GetDeviceDescription(INT32 deviceIndex, char *name, UINT32 nameLength) {
+ int ret = getMidiDeviceDescription(SND_RAWMIDI_STREAM_INPUT, deviceIndex,
+ name, nameLength);
+ return ret;
+}
+
+
+INT32 MIDI_IN_GetDeviceVersion(INT32 deviceIndex, char *name, UINT32 nameLength) {
+ int ret = getMidiDeviceVersion(deviceIndex, name, nameLength);
+ return ret;
+}
+
+/*************************************************************************/
+
+INT32 MIDI_IN_OpenDevice(INT32 deviceIndex, MidiDeviceHandle** handle) {
+ INT32 ret;
+ TRACE0("> MIDI_IN_OpenDevice\n");
+ ret = openMidiDevice(SND_RAWMIDI_STREAM_INPUT, deviceIndex, handle);
+ TRACE1("< MIDI_IN_OpenDevice: returning %d\n", (int) ret);
+ return ret;
+}
+
+
+INT32 MIDI_IN_CloseDevice(MidiDeviceHandle* handle) {
+ INT32 ret;
+ TRACE0("> MIDI_IN_CloseDevice\n");
+ ret = closeMidiDevice(handle);
+ TRACE1("< MIDI_IN_CloseDevice: returning %d\n", (int) ret);
+ return ret;
+}
+
+
+INT32 MIDI_IN_StartDevice(MidiDeviceHandle* handle) {
+ TRACE0("MIDI_IN_StartDevice\n");
+ return MIDI_SUCCESS;
+}
+
+
+INT32 MIDI_IN_StopDevice(MidiDeviceHandle* handle) {
+ TRACE0("MIDI_IN_StopDevice\n");
+ return MIDI_SUCCESS;
+}
+
+
+INT64 MIDI_IN_GetTimeStamp(MidiDeviceHandle* handle) {
+ return getMidiTimestamp(handle);
+}
+
+
+/* read the next message from the queue */
+MidiMessage* MIDI_IN_GetMessage(MidiDeviceHandle* handle) {
+ snd_seq_event_t alsa_message;
+ MidiMessage* jdk_message;
+ int err;
+ char buffer[1];
+ int status;
+
+ TRACE0("> MIDI_IN_GetMessage\n");
+ if (!handle) {
+ ERROR0("< ERROR: MIDI_IN_GetMessage(): handle is NULL\n");
+ return NULL;
+ }
+ if (!handle->deviceHandle) {
+ ERROR0("< ERROR: MIDI_IN_GetMessage(): native handle is NULL\n");
+ return NULL;
+ }
+ if (!handle->platformData) {
+ ERROR0("< ERROR: MIDI_IN_GetMessage(): platformData is NULL\n");
+ return NULL;
+ }
+
+ /* For MIDI In, the device is left in non blocking mode. So if there is
+ no data from the device, snd_rawmidi_read() returns with -11 (EAGAIN).
+ This results in jumping back to the Java layer. */
+ while (TRUE) {
+ TRACE0("before snd_rawmidi_read()\n");
+ err = snd_rawmidi_read((snd_rawmidi_t*) handle->deviceHandle, buffer, 1);
+ TRACE0("after snd_rawmidi_read()\n");
+ if (err != 1) {
+ ERROR2("< ERROR: MIDI_IN_GetMessage(): snd_rawmidi_read() returned %d : %s\n", err, snd_strerror(err));
+ return NULL;
+ }
+ // printf("received byte: %d\n", buffer[0]);
+ err = snd_midi_event_encode_byte((snd_midi_event_t*) handle->platformData,
+ (int) buffer[0],
+ &alsa_message);
+ if (err == 1) {
+ break;
+ } else if (err < 0) {
+ ERROR1("< ERROR: MIDI_IN_GetMessage(): snd_midi_event_encode_byte() returned %d\n", err);
+ return NULL;
+ }
+ }
+ jdk_message = (MidiMessage*) calloc(sizeof(MidiMessage), 1);
+ if (!jdk_message) {
+ ERROR0("< ERROR: MIDI_IN_GetMessage(): out of memory\n");
+ return NULL;
+ }
+ // TODO: tra
+ switch (alsa_message.type) {
+ case SND_SEQ_EVENT_NOTEON:
+ case SND_SEQ_EVENT_NOTEOFF:
+ case SND_SEQ_EVENT_KEYPRESS:
+ status = (alsa_message.type == SND_SEQ_EVENT_KEYPRESS) ? 0xA0 :
+ (alsa_message.type == SND_SEQ_EVENT_NOTEON) ? 0x90 : 0x80;
+ status |= alsa_message.data.note.channel;
+ setShortMessage(jdk_message, status,
+ alsa_message.data.note.note,
+ alsa_message.data.note.velocity);
+ break;
+
+ case SND_SEQ_EVENT_CONTROLLER:
+ status = 0xB0 | alsa_message.data.control.channel;
+ setShortMessage(jdk_message, status,
+ alsa_message.data.control.param,
+ alsa_message.data.control.value);
+ break;
+
+ case SND_SEQ_EVENT_PGMCHANGE:
+ case SND_SEQ_EVENT_CHANPRESS:
+ status = (alsa_message.type == SND_SEQ_EVENT_PGMCHANGE) ? 0xC0 : 0xD0;
+ status |= alsa_message.data.control.channel;
+ setShortMessage(jdk_message, status,
+ alsa_message.data.control.value, 0);
+ break;
+
+ case SND_SEQ_EVENT_PITCHBEND:
+ status = 0xE0 | alsa_message.data.control.channel;
+ // $$mp 2003-09-23:
+ // possible hack to work around a bug in ALSA. Necessary for
+ // ALSA 0.9.2. May be fixed in newer versions of ALSA.
+ // alsa_message.data.control.value ^= 0x2000;
+ // TRACE1("pitchbend value: %d\n", alsa_message.data.control.value);
+ set14bitMessage(jdk_message, status,
+ alsa_message.data.control.value);
+ break;
+
+ /* System exclusive messages */
+
+ case SND_SEQ_EVENT_SYSEX:
+ jdk_message->type = LONG_MESSAGE;
+ jdk_message->data.l.size = alsa_message.data.ext.len;
+ jdk_message->data.l.data = malloc(alsa_message.data.ext.len);
+ if (jdk_message->data.l.data == NULL) {
+ ERROR0("< ERROR: MIDI_IN_GetMessage(): out of memory\n");
+ free(jdk_message);
+ jdk_message = NULL;
+ } else {
+ memcpy(jdk_message->data.l.data, alsa_message.data.ext.ptr, alsa_message.data.ext.len);
+ }
+ break;
+
+ /* System common messages */
+
+ case SND_SEQ_EVENT_QFRAME:
+ setShortMessage(jdk_message, 0xF1,
+ alsa_message.data.control.value & 0x7F, 0);
+ break;
+
+ case SND_SEQ_EVENT_SONGPOS:
+ set14bitMessage(jdk_message, 0xF2,
+ alsa_message.data.control.value);
+ break;
+
+ case SND_SEQ_EVENT_SONGSEL:
+ setShortMessage(jdk_message, 0xF3,
+ alsa_message.data.control.value & 0x7F, 0);
+ break;
+
+ case SND_SEQ_EVENT_TUNE_REQUEST:
+ setRealtimeMessage(jdk_message, 0xF6);
+ break;
+
+ /* System realtime messages */
+
+ case SND_SEQ_EVENT_CLOCK:
+ setRealtimeMessage(jdk_message, 0xF8);
+ break;
+
+ case SND_SEQ_EVENT_START:
+ setRealtimeMessage(jdk_message, 0xFA);
+ break;
+
+ case SND_SEQ_EVENT_CONTINUE:
+ setRealtimeMessage(jdk_message, 0xFB);
+ break;
+
+ case SND_SEQ_EVENT_STOP:
+ setRealtimeMessage(jdk_message, 0xFC);
+ break;
+
+ case SND_SEQ_EVENT_SENSING:
+ setRealtimeMessage(jdk_message, 0xFE);
+ break;
+
+ case SND_SEQ_EVENT_RESET:
+ setRealtimeMessage(jdk_message, 0xFF);
+ break;
+
+ default:
+ ERROR0("< ERROR: MIDI_IN_GetMessage(): unhandled ALSA MIDI message type\n");
+ free(jdk_message);
+ jdk_message = NULL;
+
+ }
+
+ // set timestamp
+ if (jdk_message != NULL) {
+ jdk_message->timestamp = getMidiTimestamp(handle);
+ }
+ TRACE1("< MIDI_IN_GetMessage: returning %p\n", jdk_message);
+ return jdk_message;
+}
+
+
+void MIDI_IN_ReleaseMessage(MidiDeviceHandle* handle, MidiMessage* msg) {
+ if (!msg) {
+ ERROR0("< ERROR: MIDI_IN_ReleaseMessage(): message is NULL\n");
+ return;
+ }
+ if (msg->type == LONG_MESSAGE && msg->data.l.data) {
+ free(msg->data.l.data);
+ }
+ free(msg);
+}
+
+#endif /* USE_PLATFORM_MIDI_IN */