Diff: USBHostMIDI/USBHostMIDI.cpp

Revision:

24:5281ea9f6e68

Parent:

23:9c1d09c6a2b6

Child:

26:077ab26227c6

--- a/USBHostMIDI/USBHostMIDI.cpp	Wed Sep 17 14:29:11 2014 +0000
+++ b/USBHostMIDI/USBHostMIDI.cpp	Thu Sep 18 10:50:22 2014 +0000
@@ -1,253 +1,366 @@
-/* USBHostMidi library
- * Originaled by k.shoji
- * porting by Takuya Urakawa
- */
-
-/* mbed USBHost Library
- * Copyright (c) 2006-2013 ARM Limited
- *
- * Licensed under the Apache License, Version 2.0 (the "License");
- * you may not use this file except in compliance with the License.
- * You may obtain a copy of the License at
- *
- *     http://www.apache.org/licenses/LICENSE-2.0
- *
- * Unless required by applicable law or agreed to in writing, software
- * distributed under the License is distributed on an "AS IS" BASIS,
- * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
- * See the License for the specific language governing permissions and
- * limitations under the License.
- */
-
-#include "USBHostMIDI.h"
-
-#if USBHOST_MIDI
-
-#include "dbg.h"
-
-#define SET_LINE_CODING 0x20
-
-USBHostMIDI::USBHostMIDI(): circ_buf() {
-    host = USBHost::getHostInst();
-    size_bulk_in = 0;
-    size_bulk_out = 0;
-    init();
-}
-
-void USBHostMIDI::init() {
-    dev = NULL;
-    bulk_in = NULL;
-    bulk_out = NULL;
-    dev_connected = false;
-    midi_intf = -1;
-    midi_device_found = false;
-    circ_buf.flush();
-}
-
-bool USBHostMIDI::connected()
-{
-    return dev_connected;
-}
-
-bool USBHostMIDI::connect() {
-
-    if (dev_connected) {
-        return true;
-    }
-    for (uint8_t i = 0; i < MAX_DEVICE_CONNECTED; i++) {
-        if ((dev = host->getDevice(i)) != NULL) {
-            
-            USB_DBG("Trying to connect MIDI device\r\n");
-
-            if(host->enumerate(dev, this))
-                break;
-            
-            if (midi_device_found) {
-                bulk_in = dev->getEndpoint(midi_intf, BULK_ENDPOINT, IN);
-                bulk_out = dev->getEndpoint(midi_intf, BULK_ENDPOINT, OUT);
-                
-                if (!bulk_in || !bulk_out)
-                    break;
-                
-                USB_INFO("New MIDI device: VID:%04x PID:%04x [dev: %p - intf: %d]", dev->getVid(), dev->getPid(), dev, midi_intf);
-                dev->setName("MIDI", midi_intf);
-                host->registerDriver(dev, midi_intf, this, &USBHostMIDI::init);
-                
-                size_bulk_in = bulk_in->getSize();
-                size_bulk_out = bulk_out->getSize();
-                
-                bulk_in->attach(this, &USBHostMIDI::rxHandler);
-                
-                host->bulkRead(dev, bulk_in, buf, size_bulk_in, false);
-                dev_connected = true;
-                return true;
-            }
-        }
-    }
-    init();
-    return false;
-}
-
-void USBHostMIDI::rxHandler() {
-    uint8_t pos = 0;
-    uint8_t midi[4];
-    if (bulk_in) {
-        int len = bulk_in->getLengthTransferred();
-        if (bulk_in->getState() == USB_TYPE_IDLE || bulk_in->getState() == USB_TYPE_FREE) {
-            for (int i = 0; i < len; i++) {
-                circ_buf.queue(buf[i]);
-            }
-            
-            // MIDI event handling
-            while (!circ_buf.isEmpty()) {
-                // read each four bytes
-                circ_buf.dequeue(&midi[pos++]);
-                if (pos == 4) {
-                    pos = 0;
-
-                    // process MIDI message
-                    // switch by code index number
-                    switch (midi[0] & 0xf) {
-                        case 8:
-                            noteOff(midi[1] & 0xf, midi[2], midi[3]);
-                            break;
-                        case 9:
-                            if (midi[3]) {
-                                noteOn(midi[1] & 0xf, midi[2], midi[3]);
-                            } else {
-                                noteOff(midi[1] & 0xf, midi[2], midi[3]);
-                            }
-                            break;
-                        case 11:
-                            controlChange(midi[1] & 0xf, midi[2], midi[3]);
-                            break;
-                        case 12:
-                            programChange(midi[1] & 0xf, midi[2]);
-                            break;
-                        case 14:
-                            pitchBend(midi[1] & 0xf, midi[2] | (midi[3] << 7));
-                            break;
-                        default:
-                            break;
-                    }
-                }
-            }
-            
-            host->bulkRead(dev, bulk_in, buf, size_bulk_in, false);
-        }
-    }
-}
-
-int USBHostMIDI::sendNoteOn(unsigned char channel, unsigned char note, unsigned char velocity) {
-    uint8_t midi[4];
-
-    if (bulk_out) {
-        midi[0] = 9;
-        midi[1] = channel & 0xf;
-        midi[2] = note & 0x7f;
-        midi[3] = velocity & 0x7f;
-        if (host->bulkWrite(dev, bulk_out, (uint8_t *)midi, 4) == USB_TYPE_OK) {
-            return 1;
-        }
-    }
-    return -1;
-}
-
-int USBHostMIDI::sendNoteOff(unsigned char channel, unsigned char note, unsigned char velocity) {
-    uint8_t midi[4];
-
-    if (bulk_out) {
-        midi[0] = 8;
-        midi[1] = channel & 0xf;
-        midi[2] = note & 0x7f;
-        midi[3] = velocity & 0x7f;
-        if (host->bulkWrite(dev, bulk_out, (uint8_t *)midi, 4) == USB_TYPE_OK) {
-            return 1;
-        }
-    }
-    return -1;
-}
-
-int USBHostMIDI::sendControlChange(unsigned char channel, unsigned char key, unsigned char value) {
-    uint8_t midi[4];
-
-    if (bulk_out) {
-        midi[0] = 11;
-        midi[1] = channel & 0xf;
-        midi[2] = key & 0x7f;
-        midi[3] = value & 0x7f;
-        if (host->bulkWrite(dev, bulk_out, (uint8_t *)midi, 4) == USB_TYPE_OK) {
-            return 1;
-        }
-    }
-    return -1;
-}
-
-int USBHostMIDI::sendProgramChange(unsigned char channel, unsigned char program) {
-    uint8_t midi[4];
-
-    if (bulk_out) {
-        midi[0] = 12;
-        midi[1] = channel & 0xf;
-        midi[2] = program & 0x7f;
-        midi[3] = 0;
-        if (host->bulkWrite(dev, bulk_out, (uint8_t *)midi, 4) == USB_TYPE_OK) {
-            return 1;
-        }
-    }
-    return -1;
-}
-
-int USBHostMIDI::sendPitchBend(unsigned char channel, unsigned int value) {
-    uint8_t midi[4];
-
-    if (bulk_out) {
-        midi[0] = 14;
-        midi[1] = channel & 0xf;
-        midi[2] = value & 0x7f;
-        midi[3] = (value >> 7) & 0x7f;
-        if (host->bulkWrite(dev, bulk_out, (uint8_t *)midi, 4) == USB_TYPE_OK) {
-            return 1;
-        }
-    }
-    return -1;
-}
-
-/*virtual*/ void USBHostMIDI::setVidPid(uint16_t vid, uint16_t pid)
-{
-    // we don't check VID/PID for this driver
-}
-
-/*virtual*/ bool USBHostMIDI::parseInterface(uint8_t intf_nb, uint8_t intf_class, uint8_t intf_subclass, uint8_t intf_protocol) //Must return true if the interface should be parsed
-{
-    // USB MIDI class/subclass
-    if ((midi_intf == -1) &&
-        (intf_class == AUDIO_CLASS) &&
-        (intf_subclass == 0x03)) {
-        midi_intf = intf_nb;
-        return true;
-    }
-    
-    // vendor specific device
-    if ((midi_intf == -1) &&
-        (intf_class == 0xff) &&
-        (intf_subclass == 0x03)) {
-        midi_intf = intf_nb;
-        return true;
-    }
-    
-    return false;
-}
-
-/*virtual*/ bool USBHostMIDI::useEndpoint(uint8_t intf_nb, ENDPOINT_TYPE type, ENDPOINT_DIRECTION dir) //Must return true if the endpoint will be used
-{
-    if (intf_nb == midi_intf) {
-        if (type == BULK_ENDPOINT) {
-            midi_device_found = true;
-            return true;
-        }
-    }
-    return false;
-}
-
-#endif
+/* USBHostMidi library
+ * Originaled by k.shoji
+ * porting by Takuya Urakawa
+ */
+
+/* mbed USBHost Library
+ * Copyright (c) 2006-2013 ARM Limited
+ *
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ *     http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+
+#include "USBHostMIDI.h"
+
+#if USBHOST_MIDI
+
+#include "dbg.h"
+
+#define SET_LINE_CODING 0x20
+
+USBHostMIDI::USBHostMIDI() {
+    host = USBHost::getHostInst();
+    size_bulk_in = 0;
+    size_bulk_out = 0;
+    init();
+}
+
+void USBHostMIDI::init() {
+    dev = NULL;
+    bulk_in = NULL;
+    bulk_out = NULL;
+    dev_connected = false;
+    midi_intf = -1;
+    midi_device_found = false;
+    sysExBufferPos = 0;
+}
+
+bool USBHostMIDI::connected()
+{
+    return dev_connected;
+}
+
+bool USBHostMIDI::connect() {
+
+    if (dev_connected) {
+        return true;
+    }
+    for (uint8_t i = 0; i < MAX_DEVICE_CONNECTED; i++) {
+        if ((dev = host->getDevice(i)) != NULL) {
+            
+            USB_DBG("Trying to connect MIDI device\r\n");
+
+            if(host->enumerate(dev, this))
+                break;
+            
+            if (midi_device_found) {
+                bulk_in = dev->getEndpoint(midi_intf, BULK_ENDPOINT, IN);
+                bulk_out = dev->getEndpoint(midi_intf, BULK_ENDPOINT, OUT);
+                
+                if (!bulk_in || !bulk_out)
+                    break;
+                
+                USB_INFO("New MIDI device: VID:%04x PID:%04x [dev: %p - intf: %d]", dev->getVid(), dev->getPid(), dev, midi_intf);
+                dev->setName("MIDI", midi_intf);
+                host->registerDriver(dev, midi_intf, this, &USBHostMIDI::init);
+                
+                size_bulk_in = bulk_in->getSize();
+                size_bulk_out = bulk_out->getSize();
+                
+                bulk_in->attach(this, &USBHostMIDI::rxHandler);
+                
+                host->bulkRead(dev, bulk_in, buf, size_bulk_in, false);
+                dev_connected = true;
+                return true;
+            }
+        }
+    }
+    init();
+    return false;
+}
+
+void USBHostMIDI::rxHandler() {
+    uint8_t *midi;
+    if (bulk_in) {
+        int length = bulk_in->getLengthTransferred();
+        if (bulk_in->getState() == USB_TYPE_IDLE || bulk_in->getState() == USB_TYPE_FREE) {
+            // MIDI event handling
+            for (int i = 0; i < length; i += 4) {
+                if (i + 4 > length) {
+                    // length shortage, ignored.
+                    break;
+                }
+
+                // read each four bytes
+                midi = &buf[i];
+                // process MIDI message
+                // switch by code index number
+                USB_DBG("midi: %d, %d, %d, %d", midi[0]&0xf, midi[1], midi[2], midi[3]);
+                switch (midi[0] & 0xf) {
+                    case 0: // miscellaneous function codes
+                        //if(midi[1] == 0) break;
+                        //miscellaneousFunctionCode(midi[1], midi[2], midi[3]);
+                        break;
+                    case 1: // cable events
+                        //cableEvent(midi[1], midi[2], midi[3]);
+                        break;
+                    case 2: // two bytes system common messages 
+                        systemCommonTwoBytes(midi[1], midi[2]);
+                        break;
+                    case 3: // three bytes system common messages 
+                        systemCommonThreeBytes(midi[1], midi[2], midi[3]);
+                        break;
+                    case 4: // SysEx starts or continues
+                        sysExBuffer[sysExBufferPos++] = midi[1];
+                        if (sysExBufferPos >= 64) {
+                           systemExclusive(sysExBuffer, sysExBufferPos, true);
+                           sysExBufferPos = 0;
+                        }
+                        sysExBuffer[sysExBufferPos++] = midi[2];
+                        if (sysExBufferPos >= 64) {
+                            systemExclusive(sysExBuffer, sysExBufferPos, true);
+                            sysExBufferPos = 0;
+                        }
+                        sysExBuffer[sysExBufferPos++] = midi[3];
+                        // SysEx continues. don't send
+                        break;
+                    case 5: // SysEx ends with single byte
+                        sysExBuffer[sysExBufferPos++] = midi[1];
+                        systemExclusive(sysExBuffer, sysExBufferPos, false);
+                        sysExBufferPos = 0;
+                        break;
+                    case 6: // SysEx ends with two bytes
+                        sysExBuffer[sysExBufferPos++] = midi[1];
+                        if (sysExBufferPos >= 64) {
+                            systemExclusive(sysExBuffer, sysExBufferPos, true);
+                            sysExBufferPos = 0;
+                        }
+                        sysExBuffer[sysExBufferPos++] = midi[2];
+                        systemExclusive(sysExBuffer, sysExBufferPos, false);
+                        sysExBufferPos = 0;
+                        break;
+                    case 7: // SysEx ends with three bytes
+                        sysExBuffer[sysExBufferPos++] = midi[1];
+                        if (sysExBufferPos >= 64) {
+                            systemExclusive(sysExBuffer, sysExBufferPos, true);
+                            sysExBufferPos = 0;
+                        }
+                        sysExBuffer[sysExBufferPos++] = midi[2];
+                        if (sysExBufferPos >= 64) {
+                            systemExclusive(sysExBuffer, sysExBufferPos, true);
+                            sysExBufferPos = 0;
+                        }
+                        sysExBuffer[sysExBufferPos++] = midi[3];
+                        systemExclusive(sysExBuffer, sysExBufferPos, false);
+                        sysExBufferPos = 0;
+                        break;
+                    case 8:
+                        noteOff(midi[1] & 0xf, midi[2], midi[3]);
+                        break;
+                    case 9:
+                        if (midi[3]) {
+                            noteOn(midi[1] & 0xf, midi[2], midi[3]);
+                        } else {
+                            noteOff(midi[1] & 0xf, midi[2], midi[3]);
+                        }
+                        break;
+                    case 10:
+                        polyKeyPress(midi[1] & 0xf, midi[2], midi[3]);
+                        break;
+                    case 11:
+                        controlChange(midi[1] & 0xf, midi[2], midi[3]);
+                        break;
+                    case 12:
+                        programChange(midi[1] & 0xf, midi[2]);
+                        break;
+                    case 13:
+                        channelPressure(midi[1] & 0xf, midi[2]);
+                        break;
+                    case 14:
+                        pitchBend(midi[1] & 0xf, midi[2] | (midi[3] << 7));
+                        break;
+                    case 15:
+                        singleByte(midi[1]);
+                        break;
+                    default: break;
+                }
+            }
+            
+            // read another message
+            host->bulkRead(dev, bulk_in, buf, size_bulk_in, false);
+        }
+    }
+}
+
+bool USBHostMIDI::sendMidiBuffer(uint8_t data0, uint8_t data1, uint8_t data2, uint8_t data3) {
+    if (bulk_out) {
+        uint8_t midi[4];
+
+        midi[0] = data0;
+        midi[1] = data1;
+        midi[2] = data2;
+        midi[3] = data3;
+        if (host->bulkWrite(dev, bulk_out, (uint8_t *)midi, 4) == USB_TYPE_OK) {
+            return true;
+        }
+    }
+    return false;
+}
+
+bool USBHostMIDI::sendMiscellaneousFunctionCode(uint8_t data1, uint8_t data2, uint8_t data3) {
+    return sendMidiBuffer(0, data1, data2, data3);
+}
+
+bool USBHostMIDI::sendCableEvent(uint8_t data1, uint8_t data2, uint8_t data3) {
+    return sendMidiBuffer(1, data1, data2, data3);
+}
+
+bool USBHostMIDI::sendSystemCommmonTwoBytes(uint8_t data1, uint8_t data2) {
+    return sendMidiBuffer(2, data1, data2, 0);
+}
+
+bool USBHostMIDI::sendSystemCommmonThreeBytes(uint8_t data1, uint8_t data2, uint8_t data3) {
+    return sendMidiBuffer(3, data1, data2, 0);
+}
+
+bool USBHostMIDI::sendSystemExclusive(uint8_t *buffer, int length) {
+    uint8_t midi[64];
+    int midiLength;
+    int midiPos;
+    if (bulk_out) {
+        for (int i = 0; i < length; i += 48) {
+            if (i + 48 >= length) {
+                // contains last data
+                midiLength = (((length - i) + 2) / 3) * 4;
+                for (int pos = i; pos < length; pos += 3) {
+                    midiPos = (pos + 2) / 3 * 4;
+                    if (pos + 3 >= length) {
+                        // last data
+                        switch (pos % 3) {
+                            case 0:
+                                midi[midiPos    ] = 7;
+                                midi[midiPos + 1] = buffer[pos    ];
+                                midi[midiPos + 2] = buffer[pos + 1];
+                                midi[midiPos + 3] = buffer[pos + 2];
+                                break;
+                            case 1:
+                                midi[midiPos    ] = 5;
+                                midi[midiPos + 1] = buffer[pos    ];
+                                midi[midiPos + 2] = 0;
+                                midi[midiPos + 3] = 0;
+                               break;
+                            case 2:
+                                midi[midiPos    ] = 6;
+                                midi[midiPos + 1] = buffer[pos    ];
+                                midi[midiPos + 2] = buffer[pos + 1];
+                                midi[midiPos + 3] = 0;
+                                break;
+                        }
+                    } else {
+                        // has more data
+                        midi[midiPos    ] = 4;
+                        midi[midiPos + 1] = buffer[pos    ];
+                        midi[midiPos + 2] = buffer[pos + 1];
+                        midi[midiPos + 3] = buffer[pos + 2];
+                    }
+                }
+            } else {
+                // has more data
+                midiLength = 64;
+                for (int pos = i; pos < length; pos += 3) {
+                    midiPos = (pos + 2) / 3 * 4;
+                    midi[midiPos    ] = 4;
+                    midi[midiPos + 1] = buffer[pos    ];
+                    midi[midiPos + 2] = buffer[pos + 1];
+                    midi[midiPos + 3] = buffer[pos + 2];
+                }
+            }
+
+            if (host->bulkWrite(dev, bulk_out, (uint8_t *)midi, midiLength) != USB_TYPE_OK) {
+                return false;
+            }
+        }
+        return true;
+    }
+    return false;
+}
+
+bool USBHostMIDI::sendNoteOff(uint8_t channel, uint8_t note, uint8_t velocity) {
+    return sendMidiBuffer(8, channel & 0xf | 0x80, note & 0x7f, velocity & 0x7f);
+}
+
+bool USBHostMIDI::sendNoteOn(uint8_t channel, uint8_t note, uint8_t velocity) {
+    return sendMidiBuffer(9, channel & 0xf | 0x90, note & 0x7f, velocity & 0x7f);
+}
+
+bool USBHostMIDI::sendPolyKeyPress(uint8_t channel, uint8_t note, uint8_t pressure) {
+    return sendMidiBuffer(10, channel & 0xf | 0xa0, note & 0x7f, pressure & 0x7f);
+}
+
+bool USBHostMIDI::sendControlChange(uint8_t channel, uint8_t key, uint8_t value) {
+    return sendMidiBuffer(11, channel & 0xf | 0xb0, key & 0x7f, value & 0x7f);
+}
+
+bool USBHostMIDI::sendProgramChange(uint8_t channel, uint8_t program) {
+    return sendMidiBuffer(12, channel & 0xf | 0xc0, program & 0x7f, 0);
+}
+
+bool USBHostMIDI::sendChannelPressure(uint8_t channel, uint8_t pressure) {
+    return sendMidiBuffer(13, channel & 0xf | 0xd0, pressure & 0x7f, 0);
+}
+
+bool USBHostMIDI::sendPitchBend(uint8_t channel, uint16_t value) {
+    return sendMidiBuffer(14, channel & 0xf | 0xe0, value & 0x7f, (value >> 7) & 0x7f);
+}
+
+bool USBHostMIDI::sendSingleByte(uint8_t data) {
+    return sendMidiBuffer(15, data, 0, 0);
+}
+
+/*virtual*/ void USBHostMIDI::setVidPid(uint16_t vid, uint16_t pid)
+{
+    // we don't check VID/PID for this driver
+}
+
+/*virtual*/ bool USBHostMIDI::parseInterface(uint8_t intf_nb, uint8_t intf_class, uint8_t intf_subclass, uint8_t intf_protocol) //Must return true if the interface should be parsed
+{
+    // USB MIDI class/subclass
+    if ((midi_intf == -1) &&
+        (intf_class == AUDIO_CLASS) &&
+        (intf_subclass == 0x03)) {
+        midi_intf = intf_nb;
+        return true;
+    }
+    
+    // vendor specific device
+    if ((midi_intf == -1) &&
+        (intf_class == 0xff) &&
+        (intf_subclass == 0x03)) {
+        midi_intf = intf_nb;
+        return true;
+    }
+    
+    return false;
+}
+
+/*virtual*/ bool USBHostMIDI::useEndpoint(uint8_t intf_nb, ENDPOINT_TYPE type, ENDPOINT_DIRECTION dir) //Must return true if the endpoint will be used
+{
+    if (intf_nb == midi_intf) {
+        if (type == BULK_ENDPOINT) {
+            midi_device_found = true;
+            return true;
+        }
+    }
+    return false;
+}
+
+#endif