| /* |
| * Copyright (c) 2003, 2007, 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]='['; |
| getDeviceStringFromDeviceID(&buffer[2], deviceID, usePlugHw, ALSA_RAWMIDI); |
| strcat(buffer, "]"); |
| 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; |
| 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 */ |
