From 0c21a7a0d5b84dc6726462f0fbe51b8c32433262 Mon Sep 17 00:00:00 2001
From: Michael Krelin <hacker@klever.net>
Date: Fri, 11 Aug 2006 16:01:56 +0000
Subject: initial commit into repository

---
(limited to 'include/midillo/message.h')

diff --git a/include/midillo/message.h b/include/midillo/message.h
new file mode 100644
index 0000000..d6f0f36
--- a/dev/null
+++ b/include/midillo/message.h
@@ -0,0 +1,200 @@
+#ifndef __MIDILLO_MESSAGE_H
+#define __MIDILLO_MESSAGE_H
+
+#include <istream>
+#include <ostream>
+#include <vector>
+
+/**
+ * @file
+ * @brief MIDI message
+ */
+
+namespace midillo {
+    using std::istream;
+    using std::ostream;
+    using std::vector;
+
+    enum {
+	// bits
+	status_bit          = 0x80,
+	status_event_bits   = 0xF0,
+	status_channel_bits = 0x0F,
+	status_system_bits  = 0xFF,
+	// channel voice messages
+	status_note_off                = 0x80,
+	status_note_on                 = 0x90,
+	status_polyphonic_key_pressure = 0xA0,
+	status_aftertouch              = status_polyphonic_key_pressure,
+	status_control_change          = 0xB0,
+	status_program_change          = 0xC0,
+	status_channel_pressure        = 0xD0,
+	status_pitch_wheel_change      = 0xE0,
+	status_system                  = 0xF0,
+	// system common messages
+	status_system_sysex                 = 0xF0,
+	status_system_MTC_quarter_frame     = 0xF1,
+	status_system_song_position_pointer = 0xF2,
+	status_system_song_select           = 0xF3,
+	status_system_tune_request          = 0xF6,
+	status_system_end_of_sysex          = 0xF7,
+	// system real-time messages
+	status_system_timing_clock          = 0xF8,
+	status_system_midi_clock	    = status_system_timing_clock,
+	status_system_midi_tick		    = 0xF9,
+	status_system_start                 = 0xFA,
+	status_system_midi_start	    = status_system_start,
+	status_system_continue              = 0xFB,
+	status_system_midi_continue	    = status_system_continue,
+	status_system_stop                  = 0xFC,
+	status_system_midi_stop		    = status_system_stop,
+	status_system_active_sense          = 0xFE,
+	status_system_rest                  = 0xFF,
+	status_system_reset                 = status_system_rest,
+	// midi file specific
+	status_system_meta                  = 0xFF
+    };
+    enum {
+	// meta events
+	meta_sequence_number = 0x00,
+	meta_text            = 0x01,
+	meta_copyright       = 0x02,
+	meta_seq_track_name  = 0x03,
+	meta_instrument      = 0x04,
+	meta_lyric           = 0x05,
+	meta_marker          = 0x06,
+	meta_cue_point       = 0x07,
+	meta_patch_name      = 0x08,
+	meta_port_name       = 0x09,
+	meta_EOT             = 0x2F,
+	meta_tempo           = 0x51,
+	meta_SMPTE_offset    = 0x54,
+	meta_time_sig        = 0x58,
+	meta_key_sig         = 0x59,
+	meta_proprietary     = 0x7F,
+	// obsolete meta events
+	meta_midi_channel    = 0x20,
+	meta_midi_port       = 0x21
+    };
+
+    /**
+     * MIDI message container
+     */
+    class message_t {
+	public:
+	    /**
+	     * MIDI status byte
+	     */
+	    int status;
+	    /**
+	     * MIDI meta event type
+	     */
+	    int meta_status;
+	    typedef unsigned char byte_t;
+	    typedef vector<byte_t> bytes_t;
+	    /**
+	     * MIDI message data -- content is message-specific
+	     */
+	    bytes_t data;
+
+	    message_t()
+		: status(-1) { }
+	    message_t(const message_t& m)
+		: status(m.status), meta_status(m.meta_status), data(m.data) { }
+
+	    message_t& operator=(const message_t& m) {
+		status = m.status;
+		meta_status = m.meta_status;
+		data = m.data;
+		return *this;
+	    }
+
+	    /**
+	     * Load MIDI message from the stream
+	     * @param rs reference to the running status
+	     * @param s input stream
+	     */
+	    void load(int& rs,istream& s);
+	    /**
+	     * Save MIDI message to the stream
+	     * @param rs reference to the running status
+	     * @param s output stream
+	     */
+	    void save(int& rs,ostream& s) const;
+	    /**
+	     * Calculate the amount of data that would be written to stream in
+	     * case of save()
+	     * @param rs reference to the running status
+	     * @return the number of bytes
+	     */
+	    unsigned long calculate_save_size(int& rs) const;
+
+	    /**
+	     * Load data so that we have c bytes of data for the event
+	     * @param s input stream
+	     * @param c size of data needed for the event
+	     */
+	    void load_data(istream& s,int c);
+	    /**
+	     * Load sysex data from the stream
+	     * @param s input stream
+	     */
+	    void load_sysex(istream& s);
+
+	    /**
+	     * Save data to the stream
+	     * @param s output stream
+	     */
+	    void save_data(ostream& s) const;
+	    /**
+	     * Save data to the stream and verify if the amount of data is
+	     * correct
+	     * @param s output stream
+	     * @param c data bytes count
+	     */
+	    void save_data(ostream& s,int c) const;
+	    /**
+	     * Save sysex data to the stream
+	     * @param s output stream
+	     */
+	    void save_sysex(ostream& s) const;
+
+	    /**
+	     * See if the event is meta event
+	     * @return true if yes
+	     */
+	    bool is_meta() const {
+		return status==status_system_meta;
+	    }
+	    /**
+	     * Check whether the event is a specific meta event
+	     * @param meta meta event type
+	     * @return true if yes
+	     */
+	    bool is_meta(int meta) const {
+		return is_meta() && (meta_status==meta);
+	    }
+
+	    /**
+	     * See if the event is system event
+	     * @return true if yes
+	     */
+	    bool is_system() const {
+		return (status&status_event_bits)==status_system && !is_meta();
+	    }
+
+	    /**
+	     * Dump textual representation of midi message to stream
+	     * @param s output stream
+	     */
+	    void dump(ostream& s) const;
+
+    };
+
+    inline ostream& operator<<(ostream& s,const message_t& m) {
+	m.dump(s); return s;
+    }
+
+}
+
+#endif /* __MIDILLO_MESSAGE_H */
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