* midi_event_size(uchar status): return size including status / handle sysex

git-svn-id: svn://localhost/ardour2/branches/3.0@4486 d708f5d6-7413-0410-9779-e7cbd77b26cf

libs/ardour/ardour/midi_buffer.h

@@ -52,26 +52,28 @@ public:
 	bool merge(const MidiBuffer& a, const MidiBuffer& b);
 	bool merge_in_place(const MidiBuffer &other);
 	
-	template<typename B, typename E>
+	template<typename BufferType, typename MIDIEventType>
 	struct iterator_base {
-		iterator_base<B,E>(B& b, size_t o) : buffer(b), offset(o) {}
+		iterator_base<BufferType, MIDIEventType>(BufferType& b, size_t o) : buffer(b), offset(o) {}
-		inline E operator*() const {
+		inline MIDIEventType operator*() const {
 			uint8_t* ev_start = buffer._data + offset + sizeof(TimeType);
-			assert(Evoral::midi_event_size(*ev_start) >= 0);
+			int event_size = Evoral::midi_event_size(ev_start);
-			return E(EventTypeMap::instance().midi_event_type(*ev_start),
+			assert(event_size >= 0);
+			return MIDIEventType(EventTypeMap::instance().midi_event_type(*ev_start),
 					*((TimeType*)(buffer._data + offset)),
-					Evoral::midi_event_size(*ev_start) + 1, ev_start);
+					event_size, ev_start);
 		}
-		inline iterator_base<B,E>& operator++() {
+		inline iterator_base<BufferType, MIDIEventType>& operator++() {
 			uint8_t* ev_start = buffer._data + offset + sizeof(TimeType);
-			assert(Evoral::midi_event_size(*ev_start) >= 0);
+			int event_size = Evoral::midi_event_size(ev_start);
-			offset += sizeof(TimeType) + Evoral::midi_event_size(*ev_start) + 1;
+			assert(event_size >= 0);
+			offset += sizeof(TimeType) + event_size;
 			return *this;
 		}
-		inline bool operator!=(const iterator_base<B,E>& other) const {
+		inline bool operator!=(const iterator_base<BufferType, MIDIEventType>& other) const {
 			return (&buffer != &other.buffer) || (offset != other.offset);
 		}
-		B&     buffer;
+		BufferType&     buffer;
 		size_t          offset;
 	};
 	

libs/evoral/evoral/midi_util.h

@@ -19,11 +19,13 @@
 #ifndef EVORAL_MIDI_UTIL_H
 #define EVORAL_MIDI_UTIL_H
 
+#include <assert.h>
+
 #include "evoral/midi_events.h"
 
 namespace Evoral {
 
-/** Return the size of the given event NOT including the status byte,
+/** Return the size of the given event NOT the status byte,
  * or -1 if unknown (eg sysex)
  */
 static inline int
@@ -41,13 +43,13 @@ midi_event_size(unsigned char status)
 	case MIDI_CMD_CONTROL:
 	case MIDI_CMD_BENDER:
 	case MIDI_CMD_COMMON_SONG_POS:
-		return 2;
+		return 3;
 
 	case MIDI_CMD_PGM_CHANGE:
 	case MIDI_CMD_CHANNEL_PRESSURE:
 	case MIDI_CMD_COMMON_MTC_QUARTER:
 	case MIDI_CMD_COMMON_SONG_SELECT:
-		return 1;
+		return 2;
 
 	case MIDI_CMD_COMMON_TUNE_REQUEST:
 	case MIDI_CMD_COMMON_SYSEX_END:
@@ -57,7 +59,7 @@ midi_event_size(unsigned char status)
 	case MIDI_CMD_COMMON_STOP:
 	case MIDI_CMD_COMMON_SENSING:
 	case MIDI_CMD_COMMON_RESET:
-		return 0;
+		return 1;
 	
 	case MIDI_CMD_COMMON_SYSEX:
 		return -1;
@@ -66,6 +68,30 @@ midi_event_size(unsigned char status)
 	return -1;
 }
 
+/** Return the size of the given event including the status byte
+ * (which must be the first byte in \a buffer),
+ * or -1 if unknown (eg sysex)
+ */
+static inline int
+midi_event_size(uint8_t* buffer)
+{
+	uint8_t status = buffer[0];
+	
+	// if we have a channel event
+	if (status >= 0x80 && status < 0xF0) {
+		status &= 0xF0; // mask off the channel
+	}
+	
+	if (status == MIDI_CMD_COMMON_SYSEX) {
+		int end;
+		for (end = 1; buffer[end] != MIDI_CMD_COMMON_SYSEX_END; end++);
+		assert(buffer[end] == MIDI_CMD_COMMON_SYSEX_END);
+		return end + 1;
+	} else {
+		return midi_event_size(status);
+	}
+}
+
 } // namespace Evoral
 
 #endif // EVORAL_MIDI_UTIL_H

libs/evoral/src/SMF.cpp

@@ -249,7 +249,7 @@ SMF<T>::read_event(uint32_t* delta_t, uint32_t* size, uint8_t** buf) const
 		}
 	}
 	
-	const int event_size = midi_event_size((unsigned char)status) + 1;
+	const int event_size = midi_event_size((unsigned char)status);
 	if (event_size <= 0) {
 		*size = 0;
 		return 0;

libs/evoral/src/SMFReader.cpp

@@ -200,7 +200,7 @@ SMFReader::read_event(size_t    buf_len,
 		fseek(_fd, -1, SEEK_CUR);
 	} else {
 		last_status = status;
-		*ev_size = midi_event_size(status) + 1;
+		*ev_size = midi_event_size(status);
 		last_size = *ev_size;
 	}