X-Git-Url: https://main.carlh.net/gitweb/?a=blobdiff_plain;f=libs%2Fardour%2Fardour%2Fdata_type.h;h=bc59aebeb640e373264237faab496775c6f18d96;hb=24b514797ab265bf48eb93d6c2c812ce5232fdba;hp=d49ed108cd22810799ad3a025ab2be55eba96c13;hpb=c220ec3928869581e71977856b4b1e8ec94114de;p=ardour.git

diff --git a/libs/ardour/ardour/data_type.h b/libs/ardour/ardour/data_type.h
index d49ed108cd..bc59aebeb6 100644
--- a/libs/ardour/ardour/data_type.h
+++ b/libs/ardour/ardour/data_type.h
@@ -1,16 +1,17 @@
 /*
-    Copyright (C) 2006 Paul Davis 
-    
+    Copyright (C) 2006 Paul Davis
+    Author: David Robillard
+
     This program is free software; you can redistribute it and/or modify it
     under the terms of the GNU General Public License as published by the Free
     Software Foundation; either version 2 of the License, or (at your option)
     any later version.
-    
+
     This program is distributed in the hope that it will be useful, but WITHOUT
     ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
     FITNESS FOR A PARTICULAR PURPOSE.  See the GNU General Public License
     for more details.
-    
+
     You should have received a copy of the GNU General Public License along
     with this program; if not, write to the Free Software Foundation, Inc.,
     675 Mass Ave, Cambridge, MA 02139, USA.
@@ -19,60 +20,105 @@
 #ifndef __ardour_data_type_h__
 #define __ardour_data_type_h__
 
-#include <jack/jack.h>
+#include <string>
+#include <stdint.h>
+#include <glib.h>
+
+#include "ardour/libardour_visibility.h"
 
 namespace ARDOUR {
 
-class DataType
+/** A type of Data Ardour is capable of processing.
+ *
+ * The majority of this class is dedicated to conversion to and from various
+ * other type representations, simple comparison between then, etc.  This code
+ * is deliberately 'ugly' so other code doesn't have to be.
+ */
+class LIBARDOUR_API DataType
 {
 public:
+	/** Numeric symbol for this DataType.
+	 *
+	 * Castable to int for use as an array index (e.g. by ChanCount).
+	 * Note this means NIL is (ntypes-1) and guaranteed to change when
+	 * types are added, so this number is NOT suitable for serialization,
+	 * network, or binary anything.
+	 *
+	 * WARNING: The number of non-NIL entries here must match num_types.
+	 */
 	enum Symbol {
-		NIL = 0,
-		AUDIO,
-		MIDI
+		AUDIO = 0,
+		MIDI = 1,
+		NIL = 2,
 	};
 
+	/** Number of types (not including NIL).
+	 * WARNING: make sure this matches Symbol!
+	 */
+	static const uint32_t num_types = 2;
+
 	DataType(const Symbol& symbol)
 	: _symbol(symbol)
 	{}
 
-	/** Construct from a string (Used for loading from XML) */
-	DataType(const string& str) {
-		if (str == "audio")
+	/** Construct from a string (Used for loading from XML and Ports)
+	 * The string can be as in an XML file (eg "audio" or "midi"), or a
+	 */
+	DataType(const std::string& str)
+	: _symbol(NIL) {
+		if (!g_ascii_strncasecmp(str.c_str(), "audio", str.length())) {
 			_symbol = AUDIO;
-		//else if (str == "midi")
-		//	_symbol = MIDI;
-		else
-			_symbol = NIL;
-	}
-
-	bool operator==(const Symbol symbol) { return _symbol == symbol; }
-	bool operator!=(const Symbol symbol) { return _symbol != symbol; }
-
-	/** Get the Jack type this DataType corresponds to */
-	const char* to_jack_type() {
-		switch (_symbol) {
-			case AUDIO: return JACK_DEFAULT_AUDIO_TYPE;
-			//case MIDI:  return JACK_DEFAULT_MIDI_TYPE;
-			default:    return "";
+		} else if (!g_ascii_strncasecmp(str.c_str(), "midi", str.length())) {
+			_symbol = MIDI;
 		}
 	}
-	
+
 	/** Inverse of the from-string constructor */
-	const char* to_string() {
+	const char* to_string() const {
 		switch (_symbol) {
-			case AUDIO: return "audio";
-			//case MIDI:  return "midi";
-			default:    return "unknown"; // reeeally shouldn't ever happen
+		case AUDIO: return "audio";
+		case MIDI:  return "midi";
+		default:    return "unknown"; // reeeally shouldn't ever happen
 		}
 	}
 
+	const char* to_i18n_string () const;
+
+	inline operator uint32_t() const { return (uint32_t)_symbol; }
+
+	/** DataType iterator, for writing generic loops that iterate over all
+	 * available types.
+	 */
+	class iterator {
+	public:
+
+		iterator(uint32_t index) : _index(index) {}
+
+		DataType  operator*()  { return DataType((Symbol)_index); }
+		iterator& operator++() { ++_index; return *this; } // yes, prefix only
+		bool operator==(const iterator& other) { return (_index == other._index); }
+		bool operator!=(const iterator& other) { return (_index != other._index); }
+
+	private:
+		friend class DataType;
+
+		uint32_t _index;
+	};
+
+	static iterator begin() { return iterator(0); }
+	static iterator end()   { return iterator(num_types); }
+
+	bool operator==(const Symbol symbol) { return (_symbol == symbol); }
+	bool operator!=(const Symbol symbol) { return (_symbol != symbol); }
+
+	bool operator==(const DataType other) { return (_symbol == other._symbol); }
+	bool operator!=(const DataType other) { return (_symbol != other._symbol); }
+
 private:
-	Symbol _symbol;
+	Symbol _symbol; // could be const if not for the string constructor
 };
 
 
-
 } // namespace ARDOUR
 
 #endif // __ardour_data_type_h__