J. Duke | 319a3b9 | 2007-12-01 00:00:00 +0000 | [diff] [blame^] | 1 | /* |
| 2 | * Copyright 2003-2007 Sun Microsystems, Inc. All Rights Reserved. |
| 3 | * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER. |
| 4 | * |
| 5 | * This code is free software; you can redistribute it and/or modify it |
| 6 | * under the terms of the GNU General Public License version 2 only, as |
| 7 | * published by the Free Software Foundation. Sun designates this |
| 8 | * particular file as subject to the "Classpath" exception as provided |
| 9 | * by Sun in the LICENSE file that accompanied this code. |
| 10 | * |
| 11 | * This code is distributed in the hope that it will be useful, but WITHOUT |
| 12 | * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or |
| 13 | * FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License |
| 14 | * version 2 for more details (a copy is included in the LICENSE file that |
| 15 | * accompanied this code). |
| 16 | * |
| 17 | * You should have received a copy of the GNU General Public License version |
| 18 | * 2 along with this work; if not, write to the Free Software Foundation, |
| 19 | * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA. |
| 20 | * |
| 21 | * Please contact Sun Microsystems, Inc., 4150 Network Circle, Santa Clara, |
| 22 | * CA 95054 USA or visit www.sun.com if you need additional information or |
| 23 | * have any questions. |
| 24 | */ |
| 25 | |
| 26 | #define USE_ERROR |
| 27 | #define USE_TRACE |
| 28 | |
| 29 | #if USE_PLATFORM_MIDI_OUT == TRUE |
| 30 | |
| 31 | #include <alsa/asoundlib.h> |
| 32 | #include "PlatformMidi.h" |
| 33 | #include "PLATFORM_API_LinuxOS_ALSA_MidiUtils.h" |
| 34 | |
| 35 | |
| 36 | |
| 37 | static int CHANNEL_MESSAGE_LENGTH[] = { |
| 38 | -1, -1, -1, -1, -1, -1, -1, -1, 3, 3, 3, 3, 2, 2, 3 }; |
| 39 | /* 8x 9x Ax Bx Cx Dx Ex */ |
| 40 | |
| 41 | static int SYSTEM_MESSAGE_LENGTH[] = { |
| 42 | -1, 2, 3, 2, -1, -1, 1, 1, 1, -1, 1, 1, 1, -1, 1, 1 }; |
| 43 | /* F0 F1 F2 F3 F4 F5 F6 F7 F8 F9 FA FB FC FD FE FF */ |
| 44 | |
| 45 | |
| 46 | // the returned length includes the status byte. |
| 47 | // for illegal messages, -1 is returned. |
| 48 | static int getShortMessageLength(int status) { |
| 49 | int dataLength = 0; |
| 50 | if (status < 0xF0) { // channel voice message |
| 51 | dataLength = CHANNEL_MESSAGE_LENGTH[(status >> 4) & 0xF]; |
| 52 | } else { |
| 53 | dataLength = SYSTEM_MESSAGE_LENGTH[status & 0xF]; |
| 54 | } |
| 55 | return dataLength; |
| 56 | } |
| 57 | |
| 58 | |
| 59 | /* |
| 60 | * implementation of the platform-dependent |
| 61 | * MIDI out functions declared in PlatformMidi.h |
| 62 | */ |
| 63 | char* MIDI_OUT_GetErrorStr(INT32 err) { |
| 64 | return (char*) getErrorStr(err); |
| 65 | } |
| 66 | |
| 67 | |
| 68 | INT32 MIDI_OUT_GetNumDevices() { |
| 69 | TRACE0("MIDI_OUT_GetNumDevices()\n"); |
| 70 | return getMidiDeviceCount(SND_RAWMIDI_STREAM_OUTPUT); |
| 71 | } |
| 72 | |
| 73 | |
| 74 | INT32 MIDI_OUT_GetDeviceName(INT32 deviceIndex, char *name, UINT32 nameLength) { |
| 75 | TRACE0("MIDI_OUT_GetDeviceName()\n"); |
| 76 | return getMidiDeviceName(SND_RAWMIDI_STREAM_OUTPUT, deviceIndex, |
| 77 | name, nameLength); |
| 78 | } |
| 79 | |
| 80 | |
| 81 | INT32 MIDI_OUT_GetDeviceVendor(INT32 deviceIndex, char *name, UINT32 nameLength) { |
| 82 | TRACE0("MIDI_OUT_GetDeviceVendor()\n"); |
| 83 | return getMidiDeviceVendor(deviceIndex, name, nameLength); |
| 84 | } |
| 85 | |
| 86 | |
| 87 | INT32 MIDI_OUT_GetDeviceDescription(INT32 deviceIndex, char *name, UINT32 nameLength) { |
| 88 | TRACE0("MIDI_OUT_GetDeviceDescription()\n"); |
| 89 | return getMidiDeviceDescription(SND_RAWMIDI_STREAM_OUTPUT, deviceIndex, |
| 90 | name, nameLength); |
| 91 | } |
| 92 | |
| 93 | |
| 94 | INT32 MIDI_OUT_GetDeviceVersion(INT32 deviceIndex, char *name, UINT32 nameLength) { |
| 95 | TRACE0("MIDI_OUT_GetDeviceVersion()\n"); |
| 96 | return getMidiDeviceVersion(deviceIndex, name, nameLength); |
| 97 | } |
| 98 | |
| 99 | |
| 100 | /* *************************** MidiOutDevice implementation *************** */ |
| 101 | |
| 102 | INT32 MIDI_OUT_OpenDevice(INT32 deviceIndex, MidiDeviceHandle** handle) { |
| 103 | TRACE1("MIDI_OUT_OpenDevice(): deviceIndex: %d\n", (int) deviceIndex); |
| 104 | return openMidiDevice(SND_RAWMIDI_STREAM_OUTPUT, deviceIndex, handle); |
| 105 | } |
| 106 | |
| 107 | |
| 108 | INT32 MIDI_OUT_CloseDevice(MidiDeviceHandle* handle) { |
| 109 | TRACE0("MIDI_OUT_CloseDevice()\n"); |
| 110 | return closeMidiDevice(handle); |
| 111 | } |
| 112 | |
| 113 | |
| 114 | INT64 MIDI_OUT_GetTimeStamp(MidiDeviceHandle* handle) { |
| 115 | return getMidiTimestamp(handle); |
| 116 | } |
| 117 | |
| 118 | |
| 119 | INT32 MIDI_OUT_SendShortMessage(MidiDeviceHandle* handle, UINT32 packedMsg, |
| 120 | UINT32 timestamp) { |
| 121 | int err; |
| 122 | int status; |
| 123 | int data1; |
| 124 | int data2; |
| 125 | char buffer[3]; |
| 126 | |
| 127 | TRACE2("> MIDI_OUT_SendShortMessage() %x, time: %u\n", packedMsg, (unsigned int) timestamp); |
| 128 | if (!handle) { |
| 129 | ERROR0("< ERROR: MIDI_OUT_SendShortMessage(): handle is NULL\n"); |
| 130 | return MIDI_INVALID_HANDLE; |
| 131 | } |
| 132 | if (!handle->deviceHandle) { |
| 133 | ERROR0("< ERROR: MIDI_OUT_SendLongMessage(): native handle is NULL\n"); |
| 134 | return MIDI_INVALID_HANDLE; |
| 135 | } |
| 136 | status = (packedMsg & 0xFF); |
| 137 | buffer[0] = (char) status; |
| 138 | buffer[1] = (char) ((packedMsg >> 8) & 0xFF); |
| 139 | buffer[2] = (char) ((packedMsg >> 16) & 0xFF); |
| 140 | TRACE4("status: %d, data1: %d, data2: %d, length: %d\n", (int) buffer[0], (int) buffer[1], (int) buffer[2], getShortMessageLength(status)); |
| 141 | err = snd_rawmidi_write((snd_rawmidi_t*) handle->deviceHandle, buffer, getShortMessageLength(status)); |
| 142 | if (err < 0) { |
| 143 | ERROR1(" ERROR: MIDI_OUT_SendShortMessage(): snd_rawmidi_write() returned %d\n", err); |
| 144 | } |
| 145 | |
| 146 | TRACE0("< MIDI_OUT_SendShortMessage()\n"); |
| 147 | return err; |
| 148 | } |
| 149 | |
| 150 | |
| 151 | INT32 MIDI_OUT_SendLongMessage(MidiDeviceHandle* handle, UBYTE* data, |
| 152 | UINT32 size, UINT32 timestamp) { |
| 153 | int err; |
| 154 | |
| 155 | TRACE2("> MIDI_OUT_SendLongMessage() size %u, time: %u\n", (unsigned int) size, (unsigned int) timestamp); |
| 156 | if (!handle) { |
| 157 | ERROR0("< ERROR: MIDI_OUT_SendLongMessage(): handle is NULL\n"); |
| 158 | return MIDI_INVALID_HANDLE; |
| 159 | } |
| 160 | if (!handle->deviceHandle) { |
| 161 | ERROR0("< ERROR: MIDI_OUT_SendLongMessage(): native handle is NULL\n"); |
| 162 | return MIDI_INVALID_HANDLE; |
| 163 | } |
| 164 | if (!data) { |
| 165 | ERROR0("< ERROR: MIDI_OUT_SendLongMessage(): data is NULL\n"); |
| 166 | return MIDI_INVALID_HANDLE; |
| 167 | } |
| 168 | err = snd_rawmidi_write((snd_rawmidi_t*) handle->deviceHandle, |
| 169 | data, size); |
| 170 | if (err < 0) { |
| 171 | ERROR1(" ERROR: MIDI_OUT_SendLongMessage(): snd_rawmidi_write() returned %d\n", err); |
| 172 | } |
| 173 | |
| 174 | TRACE0("< MIDI_OUT_SendLongMessage()\n"); |
| 175 | return err; |
| 176 | } |
| 177 | |
| 178 | |
| 179 | #endif /* USE_PLATFORM_MIDI_OUT */ |