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/*
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* Copyright (c) 2003, 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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#define USE_ERROR
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#define USE_TRACE
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#include "PLATFORM_API_LinuxOS_ALSA_MidiUtils.h"
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#include "PLATFORM_API_LinuxOS_ALSA_CommonUtils.h"
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#include <string.h>
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#include <sys/time.h>
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static INT64 getTimeInMicroseconds() {
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struct timeval tv;
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gettimeofday(&tv, NULL);
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return (tv.tv_sec * 1000000UL) + tv.tv_usec;
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}
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const char* getErrorStr(INT32 err) {
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return snd_strerror((int) err);
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}
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// callback for iteration through devices
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// returns TRUE if iteration should continue
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typedef int (*DeviceIteratorPtr)(UINT32 deviceID,
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snd_rawmidi_info_t* rawmidi_info,
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snd_ctl_card_info_t* cardinfo,
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void *userData);
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// for each ALSA device, call iterator. userData is passed to the iterator
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// returns total number of iterations
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static int iterateRawmidiDevices(snd_rawmidi_stream_t direction,
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DeviceIteratorPtr iterator,
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void* userData) {
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int count = 0;
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int subdeviceCount;
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int card, dev, subDev;
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char devname[16];
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int err;
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snd_ctl_t *handle;
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snd_rawmidi_t *rawmidi;
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snd_rawmidi_info_t *rawmidi_info;
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snd_ctl_card_info_t *card_info, *defcardinfo = NULL;
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UINT32 deviceID;
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int doContinue = TRUE;
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snd_rawmidi_info_malloc(&rawmidi_info);
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snd_ctl_card_info_malloc(&card_info);
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// 1st try "default" device
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if (direction == SND_RAWMIDI_STREAM_INPUT) {
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err = snd_rawmidi_open(&rawmidi, NULL, ALSA_DEFAULT_DEVICE_NAME,
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SND_RAWMIDI_NONBLOCK);
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} else if (direction == SND_RAWMIDI_STREAM_OUTPUT) {
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err = snd_rawmidi_open(NULL, &rawmidi, ALSA_DEFAULT_DEVICE_NAME,
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SND_RAWMIDI_NONBLOCK);
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} else {
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ERROR0("ERROR: iterateRawmidiDevices(): direction is neither"
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" SND_RAWMIDI_STREAM_INPUT nor SND_RAWMIDI_STREAM_OUTPUT\n");
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err = MIDI_INVALID_ARGUMENT;
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}
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if (err < 0) {
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ERROR1("ERROR: snd_rawmidi_open (\"default\"): %s\n",
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snd_strerror(err));
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} else {
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err = snd_rawmidi_info(rawmidi, rawmidi_info);
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snd_rawmidi_close(rawmidi);
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if (err < 0) {
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ERROR1("ERROR: snd_rawmidi_info (\"default\"): %s\n",
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snd_strerror(err));
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} else {
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// try to get card info
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card = snd_rawmidi_info_get_card(rawmidi_info);
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if (card >= 0) {
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sprintf(devname, ALSA_HARDWARE_CARD, card);
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if (snd_ctl_open(&handle, devname, SND_CTL_NONBLOCK) >= 0) {
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if (snd_ctl_card_info(handle, card_info) >= 0) {
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defcardinfo = card_info;
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}
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snd_ctl_close(handle);
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}
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}
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// call calback function for the device
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if (iterator != NULL) {
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doContinue = (*iterator)(ALSA_DEFAULT_DEVICE_ID, rawmidi_info,
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defcardinfo, userData);
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}
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count++;
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}
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}
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// iterate cards
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card = -1;
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TRACE0("testing for cards...\n");
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if (snd_card_next(&card) >= 0) {
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TRACE1("Found card %d\n", card);
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while (doContinue && (card >= 0)) {
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sprintf(devname, ALSA_HARDWARE_CARD, card);
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TRACE1("Opening control for alsa rawmidi device \"%s\"...\n", devname);
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err = snd_ctl_open(&handle, devname, SND_CTL_NONBLOCK);
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if (err < 0) {
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ERROR2("ERROR: snd_ctl_open, card=%d: %s\n", card, snd_strerror(err));
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} else {
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TRACE0("snd_ctl_open() SUCCESS\n");
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err = snd_ctl_card_info(handle, card_info);
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if (err < 0) {
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ERROR2("ERROR: snd_ctl_card_info, card=%d: %s\n", card, snd_strerror(err));
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} else {
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TRACE0("snd_ctl_card_info() SUCCESS\n");
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dev = -1;
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while (doContinue) {
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if (snd_ctl_rawmidi_next_device(handle, &dev) < 0) {
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ERROR0("snd_ctl_rawmidi_next_device\n");
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}
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TRACE0("snd_ctl_rawmidi_next_device() SUCCESS\n");
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if (dev < 0) {
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break;
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}
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snd_rawmidi_info_set_device(rawmidi_info, dev);
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snd_rawmidi_info_set_subdevice(rawmidi_info, 0);
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snd_rawmidi_info_set_stream(rawmidi_info, direction);
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err = snd_ctl_rawmidi_info(handle, rawmidi_info);
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TRACE0("after snd_ctl_rawmidi_info()\n");
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if (err < 0) {
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if (err != -ENOENT) {
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ERROR2("ERROR: snd_ctl_rawmidi_info, card=%d: %s", card, snd_strerror(err));
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}
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} else {
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TRACE0("snd_ctl_rawmidi_info() SUCCESS\n");
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subdeviceCount = needEnumerateSubdevices(ALSA_RAWMIDI)
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? snd_rawmidi_info_get_subdevices_count(rawmidi_info)
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: 1;
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if (iterator!=NULL) {
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for (subDev = 0; subDev < subdeviceCount; subDev++) {
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TRACE3(" Iterating %d,%d,%d\n", card, dev, subDev);
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deviceID = encodeDeviceID(card, dev, subDev);
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doContinue = (*iterator)(deviceID, rawmidi_info,
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card_info, userData);
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count++;
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TRACE0("returned from iterator\n");
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if (!doContinue) {
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break;
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}
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}
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} else {
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count += subdeviceCount;
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}
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}
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} // of while(doContinue)
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}
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snd_ctl_close(handle);
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}
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if (snd_card_next(&card) < 0) {
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break;
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}
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}
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} else {
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ERROR0("No cards found!\n");
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}
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snd_ctl_card_info_free(card_info);
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snd_rawmidi_info_free(rawmidi_info);
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return count;
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}
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int getMidiDeviceCount(snd_rawmidi_stream_t direction) {
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int deviceCount;
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TRACE0("> getMidiDeviceCount()\n");
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initAlsaSupport();
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deviceCount = iterateRawmidiDevices(direction, NULL, NULL);
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TRACE0("< getMidiDeviceCount()\n");
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return deviceCount;
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}
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/*
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userData is assumed to be a pointer to ALSA_MIDIDeviceDescription.
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ALSA_MIDIDeviceDescription->index has to be set to the index of the device
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we want to get information of before this method is called the first time via
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iterateRawmidiDevices(). On each call of this method,
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ALSA_MIDIDeviceDescription->index is decremented. If it is equal to zero,
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we have reached the desired device, so action is taken.
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So after successful completion of iterateRawmidiDevices(),
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ALSA_MIDIDeviceDescription->index is zero. If it isn't, this is an
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indication of an error.
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*/
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static int deviceInfoIterator(UINT32 deviceID, snd_rawmidi_info_t *rawmidi_info,
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snd_ctl_card_info_t *cardinfo, void *userData) {
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char buffer[300];
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ALSA_MIDIDeviceDescription* desc = (ALSA_MIDIDeviceDescription*)userData;
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#ifdef ALSA_MIDI_USE_PLUGHW
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int usePlugHw = 1;
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#else
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int usePlugHw = 0;
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#endif
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TRACE0("deviceInfoIterator\n");
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initAlsaSupport();
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if (desc->index == 0) {
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// we found the device with correct index
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desc->deviceID = deviceID;
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buffer[0]=' '; buffer[1]='[';
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getDeviceStringFromDeviceID(&buffer[2], deviceID, usePlugHw, ALSA_RAWMIDI);
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strcat(buffer, "]");
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strncpy(desc->name,
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(cardinfo != NULL)
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? snd_ctl_card_info_get_id(cardinfo)
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: snd_rawmidi_info_get_id(rawmidi_info),
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desc->strLen - strlen(buffer));
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strncat(desc->name, buffer, desc->strLen - strlen(desc->name));
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desc->description[0] = 0;
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if (cardinfo != NULL) {
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strncpy(desc->description, snd_ctl_card_info_get_name(cardinfo),
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desc->strLen);
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strncat(desc->description, ", ",
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desc->strLen - strlen(desc->description));
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}
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strncat(desc->description, snd_rawmidi_info_get_id(rawmidi_info),
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desc->strLen - strlen(desc->description));
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strncat(desc->description, ", ", desc->strLen - strlen(desc->description));
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strncat(desc->description, snd_rawmidi_info_get_name(rawmidi_info),
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desc->strLen - strlen(desc->description));
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TRACE2("Returning %s, %s\n", desc->name, desc->description);
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return FALSE; // do not continue iteration
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}
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desc->index--;
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return TRUE;
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}
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static int getMIDIDeviceDescriptionByIndex(snd_rawmidi_stream_t direction,
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ALSA_MIDIDeviceDescription* desc) {
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initAlsaSupport();
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TRACE1(" getMIDIDeviceDescriptionByIndex (index = %d)\n", desc->index);
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iterateRawmidiDevices(direction, &deviceInfoIterator, desc);
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return (desc->index == 0) ? MIDI_SUCCESS : MIDI_INVALID_DEVICEID;
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}
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int initMIDIDeviceDescription(ALSA_MIDIDeviceDescription* desc, int index) {
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int ret = MIDI_SUCCESS;
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desc->index = index;
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desc->strLen = 200;
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desc->name = (char*) calloc(desc->strLen + 1, 1);
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desc->description = (char*) calloc(desc->strLen + 1, 1);
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if (! desc->name ||
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! desc->description) {
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ret = MIDI_OUT_OF_MEMORY;
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}
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return ret;
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}
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void freeMIDIDeviceDescription(ALSA_MIDIDeviceDescription* desc) {
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if (desc->name) {
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free(desc->name);
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}
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if (desc->description) {
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free(desc->description);
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}
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}
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int getMidiDeviceName(snd_rawmidi_stream_t direction, int index, char *name,
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UINT32 nameLength) {
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ALSA_MIDIDeviceDescription desc;
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int ret;
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TRACE1("getMidiDeviceName: nameLength: %d\n", (int) nameLength);
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ret = initMIDIDeviceDescription(&desc, index);
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if (ret == MIDI_SUCCESS) {
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TRACE0("getMidiDeviceName: initMIDIDeviceDescription() SUCCESS\n");
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ret = getMIDIDeviceDescriptionByIndex(direction, &desc);
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if (ret == MIDI_SUCCESS) {
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TRACE1("getMidiDeviceName: desc.name: %s\n", desc.name);
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strncpy(name, desc.name, nameLength - 1);
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name[nameLength - 1] = 0;
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}
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}
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freeMIDIDeviceDescription(&desc);
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return ret;
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}
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int getMidiDeviceVendor(int index, char *name, UINT32 nameLength) {
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strncpy(name, ALSA_VENDOR, nameLength - 1);
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name[nameLength - 1] = 0;
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return MIDI_SUCCESS;
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}
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int getMidiDeviceDescription(snd_rawmidi_stream_t direction,
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int index, char *name, UINT32 nameLength) {
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ALSA_MIDIDeviceDescription desc;
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int ret;
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ret = initMIDIDeviceDescription(&desc, index);
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if (ret == MIDI_SUCCESS) {
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ret = getMIDIDeviceDescriptionByIndex(direction, &desc);
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if (ret == MIDI_SUCCESS) {
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strncpy(name, desc.description, nameLength - 1);
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name[nameLength - 1] = 0;
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}
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}
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freeMIDIDeviceDescription(&desc);
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return ret;
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}
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int getMidiDeviceVersion(int index, char *name, UINT32 nameLength) {
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getALSAVersion(name, nameLength);
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return MIDI_SUCCESS;
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}
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static int getMidiDeviceID(snd_rawmidi_stream_t direction, int index,
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UINT32* deviceID) {
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ALSA_MIDIDeviceDescription desc;
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int ret;
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ret = initMIDIDeviceDescription(&desc, index);
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if (ret == MIDI_SUCCESS) {
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ret = getMIDIDeviceDescriptionByIndex(direction, &desc);
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if (ret == MIDI_SUCCESS) {
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// TRACE1("getMidiDeviceName: desc.name: %s\n", desc.name);
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*deviceID = desc.deviceID;
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}
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}
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freeMIDIDeviceDescription(&desc);
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return ret;
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}
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/*
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direction has to be either SND_RAWMIDI_STREAM_INPUT or
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SND_RAWMIDI_STREAM_OUTPUT.
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Returns 0 on success. Otherwise, MIDI_OUT_OF_MEMORY, MIDI_INVALID_ARGUMENT
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or a negative ALSA error code is returned.
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*/
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INT32 openMidiDevice(snd_rawmidi_stream_t direction, INT32 deviceIndex,
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MidiDeviceHandle** handle) {
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snd_rawmidi_t* native_handle;
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snd_midi_event_t* event_parser = NULL;
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int err;
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UINT32 deviceID;
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char devicename[100];
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#ifdef ALSA_MIDI_USE_PLUGHW
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int usePlugHw = 1;
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#else
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int usePlugHw = 0;
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#endif
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TRACE0("> openMidiDevice()\n");
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(*handle) = (MidiDeviceHandle*) calloc(sizeof(MidiDeviceHandle), 1);
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if (!(*handle)) {
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ERROR0("ERROR: openDevice: out of memory\n");
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return MIDI_OUT_OF_MEMORY;
|
|
389 |
}
|
|
390 |
|
|
391 |
// TODO: iterate to get dev ID from index
|
|
392 |
err = getMidiDeviceID(direction, deviceIndex, &deviceID);
|
|
393 |
TRACE1(" openMidiDevice(): deviceID: %d\n", (int) deviceID);
|
|
394 |
getDeviceStringFromDeviceID(devicename, deviceID,
|
|
395 |
usePlugHw, ALSA_RAWMIDI);
|
|
396 |
TRACE1(" openMidiDevice(): deviceString: %s\n", devicename);
|
|
397 |
|
|
398 |
// finally open the device
|
|
399 |
if (direction == SND_RAWMIDI_STREAM_INPUT) {
|
|
400 |
err = snd_rawmidi_open(&native_handle, NULL, devicename,
|
|
401 |
SND_RAWMIDI_NONBLOCK);
|
|
402 |
} else if (direction == SND_RAWMIDI_STREAM_OUTPUT) {
|
|
403 |
err = snd_rawmidi_open(NULL, &native_handle, devicename,
|
|
404 |
SND_RAWMIDI_NONBLOCK);
|
|
405 |
} else {
|
|
406 |
ERROR0(" ERROR: openMidiDevice(): direction is neither SND_RAWMIDI_STREAM_INPUT nor SND_RAWMIDI_STREAM_OUTPUT\n");
|
|
407 |
err = MIDI_INVALID_ARGUMENT;
|
|
408 |
}
|
|
409 |
if (err < 0) {
|
|
410 |
ERROR1("< ERROR: openMidiDevice(): snd_rawmidi_open() returned %d\n", err);
|
|
411 |
free(*handle);
|
|
412 |
(*handle) = NULL;
|
|
413 |
return err;
|
|
414 |
}
|
|
415 |
/* We opened with non-blocking behaviour to not get hung if the device
|
|
416 |
is used by a different process. Writing, however, should
|
|
417 |
be blocking. So we change it here. */
|
|
418 |
if (direction == SND_RAWMIDI_STREAM_OUTPUT) {
|
|
419 |
err = snd_rawmidi_nonblock(native_handle, 0);
|
|
420 |
if (err < 0) {
|
|
421 |
ERROR1(" ERROR: openMidiDevice(): snd_rawmidi_nonblock() returned %d\n", err);
|
|
422 |
snd_rawmidi_close(native_handle);
|
|
423 |
free(*handle);
|
|
424 |
(*handle) = NULL;
|
|
425 |
return err;
|
|
426 |
}
|
|
427 |
}
|
|
428 |
if (direction == SND_RAWMIDI_STREAM_INPUT) {
|
|
429 |
err = snd_midi_event_new(EVENT_PARSER_BUFSIZE, &event_parser);
|
|
430 |
if (err < 0) {
|
|
431 |
ERROR1(" ERROR: openMidiDevice(): snd_midi_event_new() returned %d\n", err);
|
|
432 |
snd_rawmidi_close(native_handle);
|
|
433 |
free(*handle);
|
|
434 |
(*handle) = NULL;
|
|
435 |
return err;
|
|
436 |
}
|
|
437 |
}
|
|
438 |
|
|
439 |
(*handle)->deviceHandle = (void*) native_handle;
|
|
440 |
(*handle)->startTime = getTimeInMicroseconds();
|
|
441 |
(*handle)->platformData = event_parser;
|
|
442 |
TRACE0("< openMidiDevice(): succeeded\n");
|
|
443 |
return err;
|
|
444 |
}
|
|
445 |
|
|
446 |
|
|
447 |
|
|
448 |
INT32 closeMidiDevice(MidiDeviceHandle* handle) {
|
|
449 |
int err;
|
|
450 |
|
|
451 |
TRACE0("> closeMidiDevice()\n");
|
|
452 |
if (!handle) {
|
|
453 |
ERROR0("< ERROR: closeMidiDevice(): handle is NULL\n");
|
|
454 |
return MIDI_INVALID_HANDLE;
|
|
455 |
}
|
|
456 |
if (!handle->deviceHandle) {
|
|
457 |
ERROR0("< ERROR: closeMidiDevice(): native handle is NULL\n");
|
|
458 |
return MIDI_INVALID_HANDLE;
|
|
459 |
}
|
|
460 |
err = snd_rawmidi_close((snd_rawmidi_t*) handle->deviceHandle);
|
|
461 |
TRACE1(" snd_rawmidi_close() returns %d\n", err);
|
|
462 |
if (handle->platformData) {
|
|
463 |
snd_midi_event_free((snd_midi_event_t*) handle->platformData);
|
|
464 |
}
|
|
465 |
free(handle);
|
|
466 |
TRACE0("< closeMidiDevice: succeeded\n");
|
|
467 |
return err;
|
|
468 |
}
|
|
469 |
|
|
470 |
|
|
471 |
INT64 getMidiTimestamp(MidiDeviceHandle* handle) {
|
|
472 |
if (!handle) {
|
|
473 |
ERROR0("< ERROR: closeMidiDevice(): handle is NULL\n");
|
|
474 |
return MIDI_INVALID_HANDLE;
|
|
475 |
}
|
|
476 |
return getTimeInMicroseconds() - handle->startTime;
|
|
477 |
}
|
|
478 |
|
|
479 |
|
|
480 |
/* end */
|