Initial Ogg Vorbis sounds effect support.

1 files changed, 71 insertions, 0 deletions

diff --git a/src/audio/vorbisfile.cc b/src/audio/vorbisfile.cc
new file mode 100644
index 0000000..572b945
--- /dev/null
+++ b/src/audio/vorbisfile.cc
@@ -0,0 +1,71 @@
+/*
+   audio/vorbis.cc
+   This file is part of the Osirion project and is distributed under
+   the terms of the GNU General Public License version 2
+*/
+
+#include "string.h"
+
+#include <iostream>
+#include <string>
+
+#include "audio/vorbisfile.h"
+#include "filesystem/filesystem.h"
+#include "sys/sys.h"
+
+#include <vorbis/codec.h>
+#include <vorbis/vorbisfile.h>
+
+namespace audio
+{
+
+PCM *Vorbis::load(std::string const & filename)
+{
+	if (!filename.size())
+		return 0;
+
+	filesystem::File *fs_file = filesystem::open(filename.c_str());
+	if (!fs_file) {
+		return 0;
+	}
+	
+	std::string vorbis_path(fs_file->path());
+	vorbis_path.append(fs_file->name());
+	filesystem::close(fs_file);
+
+	OggVorbis_File vorbis_file;
+	if (ov_fopen(vorbis_path.c_str(), &vorbis_file) < 0 ) {
+		return 0;
+	}
+		
+	vorbis_info* vorbis_streaminfo;	
+	vorbis_streaminfo = ov_info(&vorbis_file, -1);
+
+	unsigned int samplerate = vorbis_streaminfo->rate;
+	unsigned int channels  = vorbis_streaminfo->channels;
+	unsigned int bitspersample = 16;			// always.
+
+	const size_t blocksize = 1024*1024; // 1Mb blocks	
+	
+	PCM *pcm = new PCM(samplerate, bitspersample, channels, blocksize);
+	pcm->set_size(0);
+	
+	long bytesread = 0;
+	
+	do {
+		// enlarge the pcm buffer if required
+		if (pcm->size() + 4096 > pcm->buff_size()) {
+			pcm->grow(pcm->buff_size() + blocksize);
+		}
+		bytesread = ov_read(&vorbis_file, (char *)pcm->data() + pcm->size(),4096,0,2,1,0);
+		pcm->set_size( pcm->size() + bytesread);
+	} while (bytesread > 0);
+
+	ov_clear(&vorbis_file);	
+	con_debug << "  " << filename << " " << pcm->samplerate() << "Hz " << pcm->bitspersample() << "bit "
+		  << pcm->channels() << " chan " << pcm->size() << " bytes" << std::endl;
+	
+	return pcm;
+}
+
+}