From abef5eab53c6c75cd602fdabdec94259d1523858 Mon Sep 17 00:00:00 2001
From: Mikko Rasa <tdb@tdb.fi>
Date: Sun, 26 Jul 2009 17:55:52 +0000
Subject: [PATCH] Fix some uninitialized variables and memory leaks Add a
 Jukebox class for playing background music

---
 source/jukebox.cpp | 113 +++++++++++++++++++++++++++++++++++++++++++++
 source/jukebox.h   |  50 ++++++++++++++++++++
 source/sound.cpp   |   7 +--
 source/source.cpp  |   6 +--
 4 files changed, 170 insertions(+), 6 deletions(-)
 create mode 100644 source/jukebox.cpp
 create mode 100644 source/jukebox.h

diff --git a/source/jukebox.cpp b/source/jukebox.cpp
new file mode 100644
index 0000000..3cd5e08
--- /dev/null
+++ b/source/jukebox.cpp
@@ -0,0 +1,113 @@
+/* $Id$
+
+This file is part of libmspal
+Copyright © 2009  Mikko Rasa, Mikkosoft Productions
+Distributed under the LGPL
+*/
+
+#include <algorithm>
+#include <cstdlib>
+#include "jukebox.h"
+#include "sound.h"
+
+using namespace std;
+
+namespace Msp {
+namespace AL {
+
+Jukebox::Jukebox():
+	streamer(source),
+	sound(0),
+	shuffle(false)
+{ }
+
+Jukebox::~Jukebox()
+{
+	streamer.stop();
+	delete sound;
+}
+
+void Jukebox::add_track(const string &trk)
+{
+	bool was_empty=tracks.empty();
+	tracks.push_back(trk);
+	if(was_empty)
+		current_track=tracks.begin();
+}
+
+void Jukebox::remove_track(const string &trk)
+{
+	list<string>::iterator i=find(tracks.begin(), tracks.end(), trk);
+	if(i!=tracks.end())
+	{
+		if(i==current_track)
+			next();
+		tracks.erase(i);
+	}
+}
+
+void Jukebox::clear_tracks()
+{
+	stop();
+	tracks.clear();
+}
+
+void Jukebox::set_shuffle(bool s)
+{
+	shuffle=s;
+}
+
+void Jukebox::play()
+{
+	if(tracks.empty() || sound)
+		return;
+
+	sound=new AL::Sound;
+	sound->open_file(*current_track);
+	streamer.play(*sound);
+}
+
+void Jukebox::next()
+{
+	stop();
+	if(tracks.size()>1)
+	{
+		if(shuffle)
+		{
+			while(1)
+			{
+				list<string>::iterator i=tracks.begin();
+				advance(i, rand()%tracks.size());
+				if(i!=current_track)
+				{
+					current_track = i;
+					break;
+				}
+			}
+		}
+		else
+		{
+			++current_track;
+			if(current_track==tracks.end())
+				current_track=tracks.begin();
+		}
+	}
+	play();
+}
+
+void Jukebox::stop()
+{
+	streamer.stop();
+	delete sound;
+	sound=0;
+}
+
+void Jukebox::tick()
+{
+	streamer.tick();
+	if(sound && sound->eof())
+		next();
+}
+
+} // namespace AL
+} // namespace Msp
diff --git a/source/jukebox.h b/source/jukebox.h
new file mode 100644
index 0000000..2b4e0cd
--- /dev/null
+++ b/source/jukebox.h
@@ -0,0 +1,50 @@
+/* $Id$
+
+This file is part of libmspal
+Copyright © 2009  Mikko Rasa, Mikkosoft Productions
+Distributed under the LGPL
+*/
+
+#ifndef MSP_AL_JUKEBOX_H_
+#define MSP_AL_JUKEBOX_H_
+
+#include <list>
+#include <string>
+#include "source.h"
+#include "streamer.h"
+
+namespace Msp {
+namespace AL {
+
+class Sound;
+
+class Jukebox
+{
+private:
+	Source source;
+	Streamer streamer;
+	Sound *sound;
+	std::list<std::string> tracks;
+	std::list<std::string>::iterator current_track;
+	bool shuffle;
+
+public:
+	Jukebox();
+	~Jukebox();
+
+	Source &get_source() { return source; }
+	void add_track(const std::string &);
+	void remove_track(const std::string &);
+	void clear_tracks();
+	void set_shuffle(bool);
+
+	void play();
+	void next();
+	void stop();
+	void tick();
+};
+
+} // namespace AL
+} // namespace Msp
+
+#endif
diff --git a/source/sound.cpp b/source/sound.cpp
index 8b6af20..1559605 100644
--- a/source/sound.cpp
+++ b/source/sound.cpp
@@ -1,7 +1,7 @@
 /* $Id$
 
 This file is part of libmspal
-Copyright © 2008 Mikko Rasa, Mikkosoft Productions
+Copyright © 2008-2009  Mikko Rasa, Mikkosoft Productions
 Distributed under the LGPL
 */
 
@@ -46,9 +46,10 @@ int memory_seek(void *src, ogg_int64_t offset, int whence)
 	return memsrc.pos;
 }
 
-void memory_close(void *src)
+int memory_close(void *src)
 {
 	delete reinterpret_cast<MemorySource *>(src);
+	return 0;
 }
 
 long memory_tell(void *src)
@@ -61,7 +62,7 @@ ov_callbacks memory_callbacks=
 {
 	&memory_read,
 	&memory_seek,
-	0,
+	&memory_close,
 	&memory_tell
 };
 
diff --git a/source/source.cpp b/source/source.cpp
index ff04adf..348b41e 100644
--- a/source/source.cpp
+++ b/source/source.cpp
@@ -1,7 +1,7 @@
 /* $Id$
 
 This file is part of libmspal
-Copyright © 2008 Mikko Rasa, Mikkosoft Productions
+Copyright © 2008-2009  Mikko Rasa, Mikkosoft Productions
 Distributed under the LGPL
 */
 
@@ -122,14 +122,14 @@ void Source::clear_buffers()
 
 unsigned Source::get_buffers_queued() const
 {
-	int n;
+	int n=0;
 	get_attribute(AL_BUFFERS_QUEUED, &n);
 	return n;
 }
 
 unsigned Source::get_buffers_processed() const
 {
-	int n;
+	int n=0;
 	get_attribute(AL_BUFFERS_PROCESSED, &n);
 	return n;
 }
-- 
2.43.0