J. Duke | 319a3b9 | 2007-12-01 00:00:00 +0000 | [diff] [blame^] | 1 | /* |
| 2 | * Copyright 2002-2007 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 | |
| 27 | #define USE_ERROR |
| 28 | #define USE_TRACE |
| 29 | |
| 30 | #include "PlatformMidi.h" |
| 31 | |
| 32 | char* GetInternalErrorStr(INT32 err) { |
| 33 | switch (err) { |
| 34 | case MIDI_SUCCESS: return ""; |
| 35 | case MIDI_NOT_SUPPORTED: return "feature not supported"; |
| 36 | case MIDI_INVALID_DEVICEID: return "invalid device ID"; |
| 37 | case MIDI_INVALID_HANDLE: return "internal error: invalid handle"; |
| 38 | case MIDI_OUT_OF_MEMORY: return "out of memory"; |
| 39 | } |
| 40 | return NULL; |
| 41 | } |
| 42 | |
| 43 | /* |
| 44 | * internal implementation for getting error string |
| 45 | */ |
| 46 | char* MIDI_IN_InternalGetErrorString(INT32 err) { |
| 47 | char* result = GetInternalErrorStr(err); |
| 48 | |
| 49 | #if USE_PLATFORM_MIDI_IN == TRUE |
| 50 | if (!result) { |
| 51 | result = MIDI_IN_GetErrorStr(err); |
| 52 | } |
| 53 | #endif |
| 54 | if (!result) { |
| 55 | result = GetInternalErrorStr(MIDI_NOT_SUPPORTED); |
| 56 | } |
| 57 | return result; |
| 58 | } |
| 59 | |
| 60 | /* |
| 61 | * internal implementation for getting error string |
| 62 | */ |
| 63 | char* MIDI_OUT_InternalGetErrorString(INT32 err) { |
| 64 | char* result = GetInternalErrorStr(err); |
| 65 | |
| 66 | #if USE_PLATFORM_MIDI_OUT == TRUE |
| 67 | if (!result) { |
| 68 | result = MIDI_OUT_GetErrorStr(err); |
| 69 | } |
| 70 | #endif |
| 71 | if (!result) { |
| 72 | result = GetInternalErrorStr(MIDI_NOT_SUPPORTED); |
| 73 | } |
| 74 | return result; |
| 75 | } |
| 76 | |
| 77 | |
| 78 | #if USE_MIDI_QUEUE == TRUE |
| 79 | |
| 80 | // MessageQueue implementation |
| 81 | |
| 82 | MidiMessageQueue* MIDI_CreateQueue(int capacity) { |
| 83 | MidiMessageQueue* queue = (MidiMessageQueue*) malloc(sizeof(MidiMessageQueue) + ((capacity-1) * sizeof(MidiMessage))); |
| 84 | if (queue) { |
| 85 | TRACE0("MIDI_CreateQueue\n"); |
| 86 | queue->lock = MIDI_CreateLock(); |
| 87 | queue->capacity = capacity; |
| 88 | queue->size = 0; |
| 89 | queue->readIndex = 0; |
| 90 | queue->writeIndex = 0; |
| 91 | } |
| 92 | return queue; |
| 93 | } |
| 94 | |
| 95 | void MIDI_DestroyQueue(MidiMessageQueue* queue) { |
| 96 | if (queue) { |
| 97 | void* lock = queue->lock; |
| 98 | MIDI_Lock(lock); |
| 99 | free(queue); |
| 100 | MIDI_Unlock(lock); |
| 101 | MIDI_DestroyLock(lock); |
| 102 | TRACE0("MIDI_DestroyQueue\n"); |
| 103 | } |
| 104 | } |
| 105 | |
| 106 | // if overwrite is true, oldest messages will be overwritten when the queue is full |
| 107 | // returns true, if message has been added |
| 108 | int MIDI_QueueAddShort(MidiMessageQueue* queue, UINT32 packedMsg, INT64 timestamp, int overwrite) { |
| 109 | if (queue) { |
| 110 | MIDI_Lock(queue->lock); |
| 111 | if (queue->size == queue->capacity) { |
| 112 | TRACE0("MIDI_QueueAddShort: overflow\n"); |
| 113 | if (!overwrite || queue->queue[queue->writeIndex].locked) { |
| 114 | return FALSE; // failed |
| 115 | } |
| 116 | // adjust overwritten readIndex |
| 117 | queue->readIndex = (queue->readIndex+1) % queue->capacity; |
| 118 | } else { |
| 119 | queue->size++; |
| 120 | } |
| 121 | TRACE2("MIDI_QueueAddShort. index=%d, size=%d\n", queue->writeIndex, queue->size); |
| 122 | queue->queue[queue->writeIndex].type = SHORT_MESSAGE; |
| 123 | queue->queue[queue->writeIndex].data.s.packedMsg = packedMsg; |
| 124 | queue->queue[queue->writeIndex].timestamp = timestamp; |
| 125 | queue->writeIndex = (queue->writeIndex+1) % queue->capacity; |
| 126 | MIDI_Unlock(queue->lock); |
| 127 | return TRUE; |
| 128 | } |
| 129 | return FALSE; |
| 130 | } |
| 131 | |
| 132 | int MIDI_QueueAddLong(MidiMessageQueue* queue, UBYTE* data, UINT32 size, |
| 133 | INT32 sysexIndex, INT64 timestamp, int overwrite) { |
| 134 | if (queue) { |
| 135 | MIDI_Lock(queue->lock); |
| 136 | if (queue->size == queue->capacity) { |
| 137 | TRACE0("MIDI_QueueAddLong: overflow\n"); |
| 138 | if (!overwrite || queue->queue[queue->writeIndex].locked) { |
| 139 | return FALSE; // failed |
| 140 | } |
| 141 | // adjust overwritten readIndex |
| 142 | queue->readIndex = (queue->readIndex+1) % queue->capacity; |
| 143 | } else { |
| 144 | queue->size++; |
| 145 | } |
| 146 | TRACE2("MIDI_QueueAddLong. index=%d, size=%d\n", queue->writeIndex, queue->size); |
| 147 | //fprintf(stdout, "MIDI_QueueAddLong sysex-index %d\n", sysexIndex); fflush(stdout); |
| 148 | queue->queue[queue->writeIndex].type = LONG_MESSAGE; |
| 149 | queue->queue[queue->writeIndex].data.l.size = size; |
| 150 | queue->queue[queue->writeIndex].data.l.data = data; |
| 151 | queue->queue[queue->writeIndex].data.l.index = sysexIndex; |
| 152 | queue->queue[queue->writeIndex].timestamp = timestamp; |
| 153 | queue->writeIndex = (queue->writeIndex+1) % queue->capacity; |
| 154 | MIDI_Unlock(queue->lock); |
| 155 | return TRUE; |
| 156 | } |
| 157 | return FALSE; |
| 158 | } |
| 159 | |
| 160 | // returns NULL if no messages in queue. |
| 161 | MidiMessage* MIDI_QueueRead(MidiMessageQueue* queue) { |
| 162 | MidiMessage* msg = NULL; |
| 163 | if (queue) { |
| 164 | MIDI_Lock(queue->lock); |
| 165 | if (queue->size > 0) { |
| 166 | msg = &(queue->queue[queue->readIndex]); |
| 167 | TRACE2("MIDI_QueueRead. index=%d, size=%d\n", queue->readIndex, queue->size); |
| 168 | msg->locked = TRUE; |
| 169 | } |
| 170 | MIDI_Unlock(queue->lock); |
| 171 | } |
| 172 | return msg; |
| 173 | } |
| 174 | |
| 175 | void MIDI_QueueRemove(MidiMessageQueue* queue, INT32 onlyLocked) { |
| 176 | if (queue) { |
| 177 | MIDI_Lock(queue->lock); |
| 178 | if (queue->size > 0) { |
| 179 | MidiMessage* msg = &(queue->queue[queue->readIndex]); |
| 180 | if (!onlyLocked || msg->locked) { |
| 181 | TRACE2("MIDI_QueueRemove. index=%d, size=%d\n", queue->readIndex, queue->size); |
| 182 | queue->readIndex = (queue->readIndex+1) % queue->capacity; |
| 183 | queue->size--; |
| 184 | } |
| 185 | msg->locked = FALSE; |
| 186 | } |
| 187 | MIDI_Unlock(queue->lock); |
| 188 | } |
| 189 | } |
| 190 | |
| 191 | void MIDI_QueueClear(MidiMessageQueue* queue) { |
| 192 | if (queue) { |
| 193 | MIDI_Lock(queue->lock); |
| 194 | queue->size = 0; |
| 195 | queue->readIndex = 0; |
| 196 | queue->writeIndex = 0; |
| 197 | MIDI_Unlock(queue->lock); |
| 198 | } |
| 199 | } |
| 200 | |
| 201 | #endif |