--- /dev/null Thu Jan 01 00:00:00 1970 +0000
+++ b/src/java.desktop/linux/native/libjsound/PLATFORM_API_LinuxOS_ALSA_MidiUtils.c Fri Mar 23 09:51:02 2018 +0100
@@ -0,0 +1,481 @@
+/*
+ * Copyright (c) 2003, 2014, 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
+
+#include "PLATFORM_API_LinuxOS_ALSA_MidiUtils.h"
+#include "PLATFORM_API_LinuxOS_ALSA_CommonUtils.h"
+#include <string.h>
+#include <sys/time.h>
+
+static INT64 getTimeInMicroseconds() {
+ struct timeval tv;
+
+ gettimeofday(&tv, NULL);
+ return (tv.tv_sec * 1000000UL) + tv.tv_usec;
+}
+
+
+const char* getErrorStr(INT32 err) {
+ return snd_strerror((int) err);
+}
+
+
+
+// callback for iteration through devices
+// returns TRUE if iteration should continue
+typedef int (*DeviceIteratorPtr)(UINT32 deviceID,
+ snd_rawmidi_info_t* rawmidi_info,
+ snd_ctl_card_info_t* cardinfo,
+ void *userData);
+
+// for each ALSA device, call iterator. userData is passed to the iterator
+// returns total number of iterations
+static int iterateRawmidiDevices(snd_rawmidi_stream_t direction,
+ DeviceIteratorPtr iterator,
+ void* userData) {
+ int count = 0;
+ int subdeviceCount;
+ int card, dev, subDev;
+ char devname[16];
+ int err;
+ snd_ctl_t *handle;
+ snd_rawmidi_t *rawmidi;
+ snd_rawmidi_info_t *rawmidi_info;
+ snd_ctl_card_info_t *card_info, *defcardinfo = NULL;
+ UINT32 deviceID;
+ int doContinue = TRUE;
+
+ snd_rawmidi_info_malloc(&rawmidi_info);
+ snd_ctl_card_info_malloc(&card_info);
+
+ // 1st try "default" device
+ if (direction == SND_RAWMIDI_STREAM_INPUT) {
+ err = snd_rawmidi_open(&rawmidi, NULL, ALSA_DEFAULT_DEVICE_NAME,
+ SND_RAWMIDI_NONBLOCK);
+ } else if (direction == SND_RAWMIDI_STREAM_OUTPUT) {
+ err = snd_rawmidi_open(NULL, &rawmidi, ALSA_DEFAULT_DEVICE_NAME,
+ SND_RAWMIDI_NONBLOCK);
+ } else {
+ ERROR0("ERROR: iterateRawmidiDevices(): direction is neither"
+ " SND_RAWMIDI_STREAM_INPUT nor SND_RAWMIDI_STREAM_OUTPUT\n");
+ err = MIDI_INVALID_ARGUMENT;
+ }
+ if (err < 0) {
+ ERROR1("ERROR: snd_rawmidi_open (\"default\"): %s\n",
+ snd_strerror(err));
+ } else {
+ err = snd_rawmidi_info(rawmidi, rawmidi_info);
+
+ snd_rawmidi_close(rawmidi);
+ if (err < 0) {
+ ERROR1("ERROR: snd_rawmidi_info (\"default\"): %s\n",
+ snd_strerror(err));
+ } else {
+ // try to get card info
+ card = snd_rawmidi_info_get_card(rawmidi_info);
+ if (card >= 0) {
+ sprintf(devname, ALSA_HARDWARE_CARD, card);
+ if (snd_ctl_open(&handle, devname, SND_CTL_NONBLOCK) >= 0) {
+ if (snd_ctl_card_info(handle, card_info) >= 0) {
+ defcardinfo = card_info;
+ }
+ snd_ctl_close(handle);
+ }
+ }
+ // call calback function for the device
+ if (iterator != NULL) {
+ doContinue = (*iterator)(ALSA_DEFAULT_DEVICE_ID, rawmidi_info,
+ defcardinfo, userData);
+ }
+ count++;
+ }
+ }
+
+ // iterate cards
+ card = -1;
+ TRACE0("testing for cards...\n");
+ if (snd_card_next(&card) >= 0) {
+ TRACE1("Found card %d\n", card);
+ while (doContinue && (card >= 0)) {
+ sprintf(devname, ALSA_HARDWARE_CARD, card);
+ TRACE1("Opening control for alsa rawmidi device \"%s\"...\n", devname);
+ err = snd_ctl_open(&handle, devname, SND_CTL_NONBLOCK);
+ if (err < 0) {
+ ERROR2("ERROR: snd_ctl_open, card=%d: %s\n", card, snd_strerror(err));
+ } else {
+ TRACE0("snd_ctl_open() SUCCESS\n");
+ err = snd_ctl_card_info(handle, card_info);
+ if (err < 0) {
+ ERROR2("ERROR: snd_ctl_card_info, card=%d: %s\n", card, snd_strerror(err));
+ } else {
+ TRACE0("snd_ctl_card_info() SUCCESS\n");
+ dev = -1;
+ while (doContinue) {
+ if (snd_ctl_rawmidi_next_device(handle, &dev) < 0) {
+ ERROR0("snd_ctl_rawmidi_next_device\n");
+ }
+ TRACE0("snd_ctl_rawmidi_next_device() SUCCESS\n");
+ if (dev < 0) {
+ break;
+ }
+ snd_rawmidi_info_set_device(rawmidi_info, dev);
+ snd_rawmidi_info_set_subdevice(rawmidi_info, 0);
+ snd_rawmidi_info_set_stream(rawmidi_info, direction);
+ err = snd_ctl_rawmidi_info(handle, rawmidi_info);
+ TRACE0("after snd_ctl_rawmidi_info()\n");
+ if (err < 0) {
+ if (err != -ENOENT) {
+ ERROR2("ERROR: snd_ctl_rawmidi_info, card=%d: %s", card, snd_strerror(err));
+ }
+ } else {
+ TRACE0("snd_ctl_rawmidi_info() SUCCESS\n");
+ subdeviceCount = needEnumerateSubdevices(ALSA_RAWMIDI)
+ ? snd_rawmidi_info_get_subdevices_count(rawmidi_info)
+ : 1;
+ if (iterator!=NULL) {
+ for (subDev = 0; subDev < subdeviceCount; subDev++) {
+ TRACE3(" Iterating %d,%d,%d\n", card, dev, subDev);
+ deviceID = encodeDeviceID(card, dev, subDev);
+ doContinue = (*iterator)(deviceID, rawmidi_info,
+ card_info, userData);
+ count++;
+ TRACE0("returned from iterator\n");
+ if (!doContinue) {
+ break;
+ }
+ }
+ } else {
+ count += subdeviceCount;
+ }
+ }
+ } // of while(doContinue)
+ }
+ snd_ctl_close(handle);
+ }
+ if (snd_card_next(&card) < 0) {
+ break;
+ }
+ }
+ } else {
+ ERROR0("No cards found!\n");
+ }
+ snd_ctl_card_info_free(card_info);
+ snd_rawmidi_info_free(rawmidi_info);
+ return count;
+}
+
+
+
+int getMidiDeviceCount(snd_rawmidi_stream_t direction) {
+ int deviceCount;
+ TRACE0("> getMidiDeviceCount()\n");
+ initAlsaSupport();
+ deviceCount = iterateRawmidiDevices(direction, NULL, NULL);
+ TRACE0("< getMidiDeviceCount()\n");
+ return deviceCount;
+}
+
+
+
+/*
+ userData is assumed to be a pointer to ALSA_MIDIDeviceDescription.
+ ALSA_MIDIDeviceDescription->index has to be set to the index of the device
+ we want to get information of before this method is called the first time via
+ iterateRawmidiDevices(). On each call of this method,
+ ALSA_MIDIDeviceDescription->index is decremented. If it is equal to zero,
+ we have reached the desired device, so action is taken.
+ So after successful completion of iterateRawmidiDevices(),
+ ALSA_MIDIDeviceDescription->index is zero. If it isn't, this is an
+ indication of an error.
+*/
+static int deviceInfoIterator(UINT32 deviceID, snd_rawmidi_info_t *rawmidi_info,
+ snd_ctl_card_info_t *cardinfo, void *userData) {
+ char buffer[300];
+ ALSA_MIDIDeviceDescription* desc = (ALSA_MIDIDeviceDescription*)userData;
+#ifdef ALSA_MIDI_USE_PLUGHW
+ int usePlugHw = 1;
+#else
+ int usePlugHw = 0;
+#endif
+
+ TRACE0("deviceInfoIterator\n");
+ initAlsaSupport();
+ if (desc->index == 0) {
+ // we found the device with correct index
+ desc->deviceID = deviceID;
+
+ buffer[0]=' '; buffer[1]='[';
+ // buffer[300] is enough to store the actual device string w/o overrun
+ getDeviceStringFromDeviceID(&buffer[2], deviceID, usePlugHw, ALSA_RAWMIDI);
+ strncat(buffer, "]", sizeof(buffer) - strlen(buffer) - 1);
+ strncpy(desc->name,
+ (cardinfo != NULL)
+ ? snd_ctl_card_info_get_id(cardinfo)
+ : snd_rawmidi_info_get_id(rawmidi_info),
+ desc->strLen - strlen(buffer));
+ strncat(desc->name, buffer, desc->strLen - strlen(desc->name));
+ desc->description[0] = 0;
+ if (cardinfo != NULL) {
+ strncpy(desc->description, snd_ctl_card_info_get_name(cardinfo),
+ desc->strLen);
+ strncat(desc->description, ", ",
+ desc->strLen - strlen(desc->description));
+ }
+ strncat(desc->description, snd_rawmidi_info_get_id(rawmidi_info),
+ desc->strLen - strlen(desc->description));
+ strncat(desc->description, ", ", desc->strLen - strlen(desc->description));
+ strncat(desc->description, snd_rawmidi_info_get_name(rawmidi_info),
+ desc->strLen - strlen(desc->description));
+ TRACE2("Returning %s, %s\n", desc->name, desc->description);
+ return FALSE; // do not continue iteration
+ }
+ desc->index--;
+ return TRUE;
+}
+
+
+static int getMIDIDeviceDescriptionByIndex(snd_rawmidi_stream_t direction,
+ ALSA_MIDIDeviceDescription* desc) {
+ initAlsaSupport();
+ TRACE1(" getMIDIDeviceDescriptionByIndex (index = %d)\n", desc->index);
+ iterateRawmidiDevices(direction, &deviceInfoIterator, desc);
+ return (desc->index == 0) ? MIDI_SUCCESS : MIDI_INVALID_DEVICEID;
+}
+
+
+
+int initMIDIDeviceDescription(ALSA_MIDIDeviceDescription* desc, int index) {
+ int ret = MIDI_SUCCESS;
+ desc->index = index;
+ desc->strLen = 200;
+ desc->name = (char*) calloc(desc->strLen + 1, 1);
+ desc->description = (char*) calloc(desc->strLen + 1, 1);
+ if (! desc->name ||
+ ! desc->description) {
+ ret = MIDI_OUT_OF_MEMORY;
+ }
+ return ret;
+}
+
+
+void freeMIDIDeviceDescription(ALSA_MIDIDeviceDescription* desc) {
+ if (desc->name) {
+ free(desc->name);
+ }
+ if (desc->description) {
+ free(desc->description);
+ }
+}
+
+
+int getMidiDeviceName(snd_rawmidi_stream_t direction, int index, char *name,
+ UINT32 nameLength) {
+ ALSA_MIDIDeviceDescription desc;
+ int ret;
+
+ TRACE1("getMidiDeviceName: nameLength: %d\n", (int) nameLength);
+ ret = initMIDIDeviceDescription(&desc, index);
+ if (ret == MIDI_SUCCESS) {
+ TRACE0("getMidiDeviceName: initMIDIDeviceDescription() SUCCESS\n");
+ ret = getMIDIDeviceDescriptionByIndex(direction, &desc);
+ if (ret == MIDI_SUCCESS) {
+ TRACE1("getMidiDeviceName: desc.name: %s\n", desc.name);
+ strncpy(name, desc.name, nameLength - 1);
+ name[nameLength - 1] = 0;
+ }
+ }
+ freeMIDIDeviceDescription(&desc);
+ return ret;
+}
+
+
+int getMidiDeviceVendor(int index, char *name, UINT32 nameLength) {
+ strncpy(name, ALSA_VENDOR, nameLength - 1);
+ name[nameLength - 1] = 0;
+ return MIDI_SUCCESS;
+}
+
+
+int getMidiDeviceDescription(snd_rawmidi_stream_t direction,
+ int index, char *name, UINT32 nameLength) {
+ ALSA_MIDIDeviceDescription desc;
+ int ret;
+
+ ret = initMIDIDeviceDescription(&desc, index);
+ if (ret == MIDI_SUCCESS) {
+ ret = getMIDIDeviceDescriptionByIndex(direction, &desc);
+ if (ret == MIDI_SUCCESS) {
+ strncpy(name, desc.description, nameLength - 1);
+ name[nameLength - 1] = 0;
+ }
+ }
+ freeMIDIDeviceDescription(&desc);
+ return ret;
+}
+
+
+int getMidiDeviceVersion(int index, char *name, UINT32 nameLength) {
+ getALSAVersion(name, nameLength);
+ return MIDI_SUCCESS;
+}
+
+
+static int getMidiDeviceID(snd_rawmidi_stream_t direction, int index,
+ UINT32* deviceID) {
+ ALSA_MIDIDeviceDescription desc;
+ int ret;
+
+ ret = initMIDIDeviceDescription(&desc, index);
+ if (ret == MIDI_SUCCESS) {
+ ret = getMIDIDeviceDescriptionByIndex(direction, &desc);
+ if (ret == MIDI_SUCCESS) {
+ // TRACE1("getMidiDeviceName: desc.name: %s\n", desc.name);
+ *deviceID = desc.deviceID;
+ }
+ }
+ freeMIDIDeviceDescription(&desc);
+ return ret;
+}
+
+
+/*
+ direction has to be either SND_RAWMIDI_STREAM_INPUT or
+ SND_RAWMIDI_STREAM_OUTPUT.
+ Returns 0 on success. Otherwise, MIDI_OUT_OF_MEMORY, MIDI_INVALID_ARGUMENT
+ or a negative ALSA error code is returned.
+*/
+INT32 openMidiDevice(snd_rawmidi_stream_t direction, INT32 deviceIndex,
+ MidiDeviceHandle** handle) {
+ snd_rawmidi_t* native_handle;
+ snd_midi_event_t* event_parser = NULL;
+ int err;
+ UINT32 deviceID = 0;
+ char devicename[100];
+#ifdef ALSA_MIDI_USE_PLUGHW
+ int usePlugHw = 1;
+#else
+ int usePlugHw = 0;
+#endif
+
+ TRACE0("> openMidiDevice()\n");
+
+ (*handle) = (MidiDeviceHandle*) calloc(sizeof(MidiDeviceHandle), 1);
+ if (!(*handle)) {
+ ERROR0("ERROR: openDevice: out of memory\n");
+ return MIDI_OUT_OF_MEMORY;
+ }
+
+ // TODO: iterate to get dev ID from index
+ err = getMidiDeviceID(direction, deviceIndex, &deviceID);
+ TRACE1(" openMidiDevice(): deviceID: %d\n", (int) deviceID);
+ getDeviceStringFromDeviceID(devicename, deviceID,
+ usePlugHw, ALSA_RAWMIDI);
+ TRACE1(" openMidiDevice(): deviceString: %s\n", devicename);
+
+ // finally open the device
+ if (direction == SND_RAWMIDI_STREAM_INPUT) {
+ err = snd_rawmidi_open(&native_handle, NULL, devicename,
+ SND_RAWMIDI_NONBLOCK);
+ } else if (direction == SND_RAWMIDI_STREAM_OUTPUT) {
+ err = snd_rawmidi_open(NULL, &native_handle, devicename,
+ SND_RAWMIDI_NONBLOCK);
+ } else {
+ ERROR0(" ERROR: openMidiDevice(): direction is neither SND_RAWMIDI_STREAM_INPUT nor SND_RAWMIDI_STREAM_OUTPUT\n");
+ err = MIDI_INVALID_ARGUMENT;
+ }
+ if (err < 0) {
+ ERROR1("< ERROR: openMidiDevice(): snd_rawmidi_open() returned %d\n", err);
+ free(*handle);
+ (*handle) = NULL;
+ return err;
+ }
+ /* We opened with non-blocking behaviour to not get hung if the device
+ is used by a different process. Writing, however, should
+ be blocking. So we change it here. */
+ if (direction == SND_RAWMIDI_STREAM_OUTPUT) {
+ err = snd_rawmidi_nonblock(native_handle, 0);
+ if (err < 0) {
+ ERROR1(" ERROR: openMidiDevice(): snd_rawmidi_nonblock() returned %d\n", err);
+ snd_rawmidi_close(native_handle);
+ free(*handle);
+ (*handle) = NULL;
+ return err;
+ }
+ }
+ if (direction == SND_RAWMIDI_STREAM_INPUT) {
+ err = snd_midi_event_new(EVENT_PARSER_BUFSIZE, &event_parser);
+ if (err < 0) {
+ ERROR1(" ERROR: openMidiDevice(): snd_midi_event_new() returned %d\n", err);
+ snd_rawmidi_close(native_handle);
+ free(*handle);
+ (*handle) = NULL;
+ return err;
+ }
+ }
+
+ (*handle)->deviceHandle = (void*) native_handle;
+ (*handle)->startTime = getTimeInMicroseconds();
+ (*handle)->platformData = event_parser;
+ TRACE0("< openMidiDevice(): succeeded\n");
+ return err;
+}
+
+
+
+INT32 closeMidiDevice(MidiDeviceHandle* handle) {
+ int err;
+
+ TRACE0("> closeMidiDevice()\n");
+ if (!handle) {
+ ERROR0("< ERROR: closeMidiDevice(): handle is NULL\n");
+ return MIDI_INVALID_HANDLE;
+ }
+ if (!handle->deviceHandle) {
+ ERROR0("< ERROR: closeMidiDevice(): native handle is NULL\n");
+ return MIDI_INVALID_HANDLE;
+ }
+ err = snd_rawmidi_close((snd_rawmidi_t*) handle->deviceHandle);
+ TRACE1(" snd_rawmidi_close() returns %d\n", err);
+ if (handle->platformData) {
+ snd_midi_event_free((snd_midi_event_t*) handle->platformData);
+ }
+ free(handle);
+ TRACE0("< closeMidiDevice: succeeded\n");
+ return err;
+}
+
+
+INT64 getMidiTimestamp(MidiDeviceHandle* handle) {
+ if (!handle) {
+ ERROR0("< ERROR: closeMidiDevice(): handle is NULL\n");
+ return MIDI_INVALID_HANDLE;
+ }
+ return getTimeInMicroseconds() - handle->startTime;
+}
+
+
+/* end */