diff options
Diffstat (limited to 'sound/mididrv.h')
| -rw-r--r-- | sound/mididrv.h | 45 |
1 files changed, 36 insertions, 9 deletions
diff --git a/sound/mididrv.h b/sound/mididrv.h index b2d4d37aa0..09d6e541d8 100644 --- a/sound/mididrv.h +++ b/sound/mididrv.h @@ -165,8 +165,24 @@ public: /** Close the midi driver. */ virtual void close() = 0; - /** Output a packed midi command to the midi stream. */ + /** + * Output a packed midi command to the midi stream. + * The 'lowest' byte (i.e. b & 0xFF) is the status + * code, then come (if used) the first and second + * opcode. + */ virtual void send(uint32 b) = 0; + + /** + * Output a midi command to the midi stream. Convenience wrapper + * around the usual 'packed' send method. + * + * Do NOT use this for sysEx transmission; instead, use the sysEx() + * method below. + */ + void send(byte status, byte firstOp, byte secondOp) { + send(status | ((uint32)firstOp << 8) | ((uint32)secondOp << 16)); + } /** Get or set a property. */ virtual uint32 property(int prop, uint32 param) { return 0; } @@ -175,18 +191,29 @@ public: static const char *getErrorName(int error_code); // HIGH-LEVEL SEMANTIC METHODS - virtual void setPitchBendRange(byte channel, uint range) - { - send(( 0 << 16) | (101 << 8) | (0xB0 | channel)); - send(( 0 << 16) | (100 << 8) | (0xB0 | channel)); - send((range << 16) | ( 6 << 8) | (0xB0 | channel)); - send(( 0 << 16) | ( 38 << 8) | (0xB0 | channel)); - send(( 127 << 16) | (101 << 8) | (0xB0 | channel)); - send(( 127 << 16) | (100 << 8) | (0xB0 | channel)); + virtual void setPitchBendRange(byte channel, uint range) { + send(0xB0 | channel, 101, 0); + send(0xB0 | channel, 100, 0); + send(0xB0 | channel, 6, range); + send(0xB0 | channel, 38, 0); + send(0xB0 | channel, 101, 127); + send(0xB0 | channel, 100, 127); } + /** + * Transmit a sysEx to the midi device. + * + * The given msg MUST NOT contain the usual SysEx frame, i.e. + * do NOT include the leading 0xF0 and the trailing 0xF7. + * + * Furthermore, the maximal supported length of a SysEx + * is 254 bytes. Passing longer buffers can lead to + * undefined behavior (most likely, a crash). + */ virtual void sysEx(const byte *msg, uint16 length) { } + virtual void sysEx_customInstrument(byte channel, uint32 type, const byte *instr) { } + virtual void metaEvent(byte type, byte *data, uint16 length) { } // Timing functions - MidiDriver now operates timers |