--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/engine/core/loaders/native/audio_loaders/sounddecoder_ogg.cpp	Sun Jun 29 18:44:17 2008 +0000
@@ -0,0 +1,134 @@
+/***************************************************************************
+ *   Copyright (C) 2005-2008 by the FIFE team                              *
+ *   http://www.fifengine.de                                               *
+ *   This file is part of FIFE.                                            *
+ *                                                                         *
+ *   FIFE 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 St, Fifth Floor, Boston, MA  02110-1301  USA              *
+ ***************************************************************************/
+
+// Standard C++ library includes
+
+// Platform specific includes
+
+// 3rd party library includes
+
+// FIFE includes
+// These includes are split up in two parts, separated by one empty line
+// First block: files included from the FIFE root src directory
+// Second block: files included from the same folder
+#include "util/log/logger.h"
+#include "util/base/exception.h"
+
+#include "sounddecoder_ogg.h"
+
+namespace FIFE {
+	static Logger _log(LM_AUDIO);
+	
+	/* OggVorbis Callback functions
+	 */
+	namespace OGG_cb {
+		static size_t read(void *ptr, size_t size, size_t nmemb, void *datasource) {
+			RawData* rdp = reinterpret_cast<RawData*>(datasource);
+			size_t restlen = rdp->getDataLength()-rdp->getCurrentIndex();
+			size_t len = (restlen<=size*nmemb)?restlen:size*nmemb;
+			if (len) {
+				rdp->readInto(reinterpret_cast<uint8_t *>(ptr), len);
+			}
+			return len;
+		}
+
+		static int seek(void *datasource, ogg_int64_t offset, int whence) {
+			RawData* rdp = reinterpret_cast<RawData*>(datasource);
+			switch (whence) {
+				case SEEK_SET:
+					(*rdp).setIndex(offset);
+					return 0;
+				case SEEK_CUR:
+					(*rdp).moveIndex(offset);
+					return 0;
+				case SEEK_END:
+					(*rdp).setIndex( (*rdp).getDataLength() -1 + offset);
+					return 0;
+			}
+			return -1;
+		}
+		
+		static int close(void *datasource) { return 0; }
+		
+		static long tell(void *datasource) {
+			RawData* rdp = reinterpret_cast<RawData*>(datasource);
+			return (*rdp).getCurrentIndex();
+		}
+	}
+
+	SoundDecoderOgg::SoundDecoderOgg(RawData* rdp) : m_file(rdp) {
+							
+		ov_callbacks ocb = {
+			OGG_cb::read, OGG_cb::seek, OGG_cb::close, OGG_cb::tell
+		};
+		
+		if (0 > ov_open_callbacks(m_file.get(), &m_ovf, 0, 0, ocb)) {
+			throw InvalidFormat("Error opening OggVorbis file");
+		}
+		
+		
+		vorbis_info *vi = ov_info(&m_ovf, -1);
+		if (!vi) {
+			throw InvalidFormat("Error fetching OggVorbis info");
+		}
+		
+		if (!ov_seekable(&m_ovf)) {
+			throw InvalidFormat("OggVorbis file has to be seekable");
+		}
+		
+		m_isstereo = vi->channels == 2;
+		m_samplerate = vi->rate;
+		m_is8bit = false;
+		m_declength = (m_isstereo ? 2 : 1) * 2 * ov_pcm_total(&m_ovf, -1);
+		m_datasize = 0;
+		m_data = NULL;
+	}
+	
+	bool SoundDecoderOgg::decode(unsigned long length) {
+		int stream = 0;
+		int ret = 0;
+		
+		// release buffer and allocate new memory
+		releaseBuffer();
+		m_data = new char[length];
+		
+		// decode the stream
+		m_datasize = 0;
+		do {
+			ret = ov_read(&m_ovf, m_data + m_datasize, 
+			              length-m_datasize, 0, 2, 1, &stream);            
+			if (ret > 0) {
+				m_datasize += ret;
+			}
+			
+		} while (length-m_datasize > 0 && ret > 0);
+		
+		return m_datasize == 0;
+	}
+	
+	bool SoundDecoderOgg::setCursor(unsigned long pos) {
+		
+		if (ov_pcm_seek(&m_ovf, pos / ((m_isstereo ? 2 : 1) * 2)) == 0) {
+			return true;
+		}
+		return false;
+	}
+}