Merging the gsoc2010-opengl branch

svn-id: r54518

1 files changed, 105 insertions, 0 deletions

diff --git a/backends/mixer/sdl/sdl-mixer.h b/backends/mixer/sdl/sdl-mixer.h
new file mode 100644
index 0000000000..1b3a3543dc
--- /dev/null
+++ b/backends/mixer/sdl/sdl-mixer.h
@@ -0,0 +1,105 @@
+/* ScummVM - Graphic Adventure Engine
+ *
+ * ScummVM is the legal property of its developers, whose names
+ * are too numerous to list here. Please refer to the COPYRIGHT
+ * file distributed with this source distribution.
+ *
+ * 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., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301, USA.
+ *
+ * $URL$
+ * $Id$
+ *
+ */
+
+#ifndef BACKENDS_MIXER_SDL_H
+#define BACKENDS_MIXER_SDL_H
+
+#if defined(__SYMBIAN32__)
+#include <esdl\SDL.h>
+#else
+#include <SDL.h>
+#endif
+
+#include "sound/mixer_intern.h"
+
+/**
+ * SDL mixer manager. It wraps the actual implementation
+ * of the Audio:Mixer used by the engine, and setups
+ * the SDL audio subsystem and the callback for the
+ * audio mixer implementation.
+ */
+class SdlMixerManager {
+public:
+	SdlMixerManager();
+	virtual ~SdlMixerManager();
+
+	/**
+	 * Initialize and setups the mixer
+	 */
+	virtual void init();
+
+	/**
+	 * Get the audio mixer implementation
+	 */
+	Audio::Mixer *getMixer() { return (Audio::Mixer *)_mixer; }
+
+	// Used by LinuxMoto Port
+
+	/**
+	 * Pauses the audio system
+	 */
+	virtual void suspendAudio();
+
+	/**
+	 * Resumes the audio system
+	 */
+	virtual int resumeAudio();
+
+protected:
+	/** The mixer implementation */
+	Audio::MixerImpl *_mixer;
+
+	/**
+	 * The obtained audio specification after opening the
+	 * audio system.
+	 */
+	SDL_AudioSpec _obtainedRate;
+
+	/** State of the audio system */
+	bool _audioSuspended;
+
+	/**
+	 * Returns the desired audio specification 
+	 */
+	virtual SDL_AudioSpec getAudioSpec();
+
+	/**
+	 * Starts SDL audio
+	 */
+	virtual void startAudio();
+
+	/**
+	 * Handles the audio callback
+	 */
+	virtual void callbackHandler(byte *samples, int len);
+
+	/**
+	 * The mixer callback entry point. Static functions can't be overrided
+	 * by subclasses, so it invokes the non-static function callbackHandler()
+	 */
+	static void sdlCallback(void *this_, byte *samples, int len);
+};
+
+#endif