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Diffstat (limited to 'src/midiio/src/MidiMessage.cpp')
| -rw-r--r-- | src/midiio/src/MidiMessage.cpp | 406 |
1 files changed, 406 insertions, 0 deletions
diff --git a/src/midiio/src/MidiMessage.cpp b/src/midiio/src/MidiMessage.cpp new file mode 100644 index 0000000..5f3df19 --- /dev/null +++ b/src/midiio/src/MidiMessage.cpp @@ -0,0 +1,406 @@ +// +// Copyright 1997-1998 by Craig Stuart Sapp, All Rights Reserved. +// Programmer: Craig Stuart Sapp <craig@ccrma.stanford.edu> +// Creation Date: 19 December 1997 +// Last Modified: Fri Jan 23 00:26:12 GMT-0800 1998 +// Last Modified: Sun Sep 20 12:17:26 PDT 1998 +// Last Modified: Mon Oct 15 14:29:12 PDT 2001 (added is_note functions) +// Filename: ...sig/src/sigControl/MidiMessage.cpp +// Web Address: http://sig.sapp.org/src/sigControl/MidiMessage.cpp +// Syntax: C++ +// +// Description: A structure for handling MIDI input messages. +// This class stores a time stamp plus up to +// four MIDI message bytes. System Exclusive messages +// are stored in a separate array in the MidiInPort +// class, and their storage index is passed to the +// user through a MIDI message for later extraction +// of the full sysex message. +// + +#include "MidiMessage.h" + + +////////////////////////////// +// +// MidiMessage::MidiMessage +// + +MidiMessage::MidiMessage(void) { + // no initialization. Note that the default contents are undefined. +} + + +// default value aTime = 0 +MidiMessage::MidiMessage(int aCommand, int aP1, int aP2, int aTime) { + time = aTime; + command() = (uchar)aCommand; + p1() = (uchar)aP1; + p2() = (uchar)aP2; +} + + +MidiMessage::MidiMessage(const MidiMessage& aMessage) { + time = aMessage.time; + data = aMessage.data; +} + + + +////////////////////////////// +// +// MidiMessage::~MidiMessage -- Destructor. +// + +MidiMessage::~MidiMessage() { + // do nothing +} + + + +////////////////////////////// +// +// MidiMessage::command -- returns the MIDI command byte +// + +uchar& MidiMessage::command(void) { + return p0(); +} + + + +////////////////////////////// +// +// MidiMessage::operator= -- defines how objects are to be copied +// + +MidiMessage& MidiMessage::operator=(const MidiMessage& aMessage) { + time = aMessage.time; + data = aMessage.data; + return *this; +} + + + +////////////////////////////// +// +// MidiMessage::operator[] -- access to byte data +// can only access index 0 to 3, other number will be +// chopped. +// + +uchar& MidiMessage::operator[](int index) { + return *(((uchar*)&data)+(index & 0x3)); +} + + + +////////////////////////////// +// +// MidiMessage::p0 -- returns the command byte of the +// midi message. Same as the command() function. +// + +uchar& MidiMessage::p0(void) { + return *(((uchar*)&data)+0); +} + + + +////////////////////////////// +// +// MidiMessage::p1 -- returns the first parameter of the +// midi message. Valid if the command requires a parameter. +// + +uchar& MidiMessage::p1(void) { + return *(((uchar*)&data)+1); +} + + + +////////////////////////////// +// +// MidiMessage::p2 -- returns the second parameter of the +// midi message. Valid if the command requires two parameters. +// + +uchar& MidiMessage::p2(void) { + return *(((uchar*)&data)+2); +} + + +////////////////////////////// +// +// MidiMessage::p3 -- returns the third parameter of the +// midi message. Valid if the command requires three parameters +// (but none of the MIDI command do). +// + +uchar& MidiMessage::p3(void) { + return *(((uchar*)&data)+3); +} + + + +////////////////////////////// +// +// MidiMessage:getArgCount -- +// + +int MidiMessage::getArgCount(void) const { + return getParameterCount(); +} + + + +////////////////////////////// +// +// MidiMessage::getParameterCount -- returns the number +// of valid parameters for the assiciated MIDI command +// stored in p0. Returns -1 if MIDI command is invalid, +// or the number of valid parameters is unknown. +// + +int MidiMessage::getParameterCount(void) const { + int output = -1; + switch (*(((uchar*)&data)+0) & 0xf0) { + case 0x80: // note-off + case 0x90: // note-on + case 0xa0: // aftertouch + case 0xb0: // continuous controller + case 0xe0: // pitch wheel + output = 2; + break; + case 0xc0: // patch change + case 0xd0: // channel pressure + output = 1; + break; + case 0xf0: + switch (*(((uchar*)&data)+0)) { + // System Common Messages + case 0xf0: return -1; // variable for sysex + case 0xf1: return 1; // MIDI Time Code Quarter Frame + case 0xf2: return 2; // Song Position Pointer + case 0xf3: return 1; // Song Select + case 0xf4: return 0; // Undefined + case 0xf5: return 0; // Undefined + case 0xf6: return 0; // Tune Request + case 0xf7: return 0; // End of System exclusive + // System Real-Time Messages + case 0xf8: return 0; // Timing Clock + case 0xf9: return 0; // Undefined + case 0xfa: return 0; // Start + case 0xfb: return 0; // Continue + case 0xfc: return 0; // Stop + case 0xfd: return 0; // Undefined + case 0xfe: return 0; // Active Sensing + case 0xff: return 0; // System Reset + } + return -1; + break; + default: // don't know or invalid command + output = -1; + break; + } + + return output; +} + + + +////////////////////////////// +// +// MidiMessage::getCommand -- same as command(). +// + +uchar MidiMessage::getCommand(void) const { + return getP0(); +} + + + +////////////////////////////// +// +// MidiMessage::getP0 -- same as p0(). +// + +uchar MidiMessage::getP0(void) const { + return *(((uchar*)&data)+0); +} + + + +////////////////////////////// +// +// MidiMessage::getP1 -- same as p1(). +// + +uchar MidiMessage::getP1(void) const { + return *(((uchar*)&data)+1); +} + + + +////////////////////////////// +// +// MidiMessage::getP2 -- same as p2(). +// + +uchar MidiMessage::getP2(void) const { + return *(((uchar*)&data)+2); +} + + + +////////////////////////////// +// +// MidiMessage::getP3 -- same as p3(). +// + +uchar MidiMessage::getP3(void) const { + return *(((uchar*)&data)+3); +} + + + +////////////////////////////// +// +// MidiMessage::setCommand -- same as command(). +// + +void MidiMessage::setCommand(uchar aCommand) { + command() = aCommand; +} + + + +////////////////////////////// +// +// MidiMessage::setData -- sets the message bytes +// default values: aP1 = 0, aP2 = 0, aP3 = 0. +// + +void MidiMessage::setData(uchar aCommand, uchar aP1, uchar aP2, uchar aP3) { + setCommand(aCommand); + setP1(aP1); + setP2(aP2); + setP3(aP3); +} + + + +////////////////////////////// +// +// MidiMessage::setP0 -- same as p0(). +// + +void MidiMessage::setP0(uchar aP0) { + p0() = aP0; +} + + + +////////////////////////////// +// +// MidiMessage::setP1 -- same as p1(). +// + +void MidiMessage::setP1(uchar aP1) { + p1() = aP1; +} + + + +////////////////////////////// +// +// MidiMessage::setP2 -- same as p2(). +// + +void MidiMessage::setP2(uchar aP2) { + p2() = aP2; +} + + + +////////////////////////////// +// +// MidiMessage::setP3 -- same as p3(). +// + +void MidiMessage::setP3(uchar aP3) { + p3() = aP3; +} + + + +////////////////////////////// +// +// MidiMessage::is_note -- Returns true if the MIDI command is 0x80 or 0x90. +// + +int MidiMessage::is_note(void) { + if ((p0() & 0xf0) == 0x90) { // note-on or note-off + return 1; + } else if ((p0() & 0xf0) == 0x80) { // note-off + return 1; + } else { + return 0; + } +} + + + +////////////////////////////// +// +// MidiMessage::is_note_on -- Returns true if the MIDI command is a note +// on message (0x90 series with p2() > 0). +// + +int MidiMessage::is_note_on(void) { + if (((p0() & 0xf0) == 0x90) && p2() > 0) { + return 1; + } else { + return 0; + } +} + + + +////////////////////////////// +// +// MidiMessage::is_note_off -- Returns true if the MIDI command is a note +// off message (0x80 series or 0x90 series with p2() == 0). +// + +int MidiMessage::is_note_off(void) { + if ((p0() & 0xf0) == 0x80) { + return 1; + } else if (((p0() & 0xf0) == 0x90) && (p2() == 0)) { + return 1; + } else { + return 0; + } +} + + +/////////////////////////////////////////////////////////////////////////// + +////////////////////////////// +// +// operator<< MidiMessage +// + +std::ostream& operator<<(std::ostream& out, MidiMessage& aMessage) { + out << "(" << aMessage.time << ") " + << std::hex << (int)aMessage.getP0() << ": "; + for (int i=1; i<=aMessage.getArgCount(); i++) { + out << std::dec << (int)aMessage[i] << ' '; + } + + return out; +} + + + +// md5sum: 487f0fddeb8db20d81f9c039e2a460c9 - MidiMessage.cpp =css= 20030102 |