| /* |
| * 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 |
| |
| #if USE_PLATFORM_MIDI_IN == TRUE |
| |
| |
| #include <alsa/asoundlib.h> |
| #include "PlatformMidi.h" |
| #include "PLATFORM_API_LinuxOS_ALSA_MidiUtils.h" |
| |
| /* |
| * 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() { |
| 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 */ |
