Initial import.

1 files changed, 479 insertions, 0 deletions

diff --git a/src/client/snd_codec_ogg.c b/src/client/snd_codec_ogg.c
new file mode 100644
index 0000000..0ca2f68
--- /dev/null
+++ b/src/client/snd_codec_ogg.c
@@ -0,0 +1,479 @@
+/*
+===========================================================================
+Copyright (C) 1999-2005 Id Software, Inc.
+Copyright (C) 2000-2009 Darklegion Development
+Copyright (C) 2005 Stuart Dalton (badcdev@gmail.com)
+Copyright (C) 2005-2006 Joerg Dietrich <dietrich_joerg@gmx.de>
+
+This file is part of Tremulous.
+
+Tremulous 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.
+
+Tremulous 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 Tremulous; if not, write to the Free Software
+Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA  02110-1301  USA
+===========================================================================
+*/
+
+// OGG support is enabled by this define
+#ifdef USE_CODEC_VORBIS
+
+// includes for the Q3 sound system
+#include "client.h"
+#include "snd_codec.h"
+
+// includes for the OGG codec
+#include <errno.h>
+#define OV_EXCLUDE_STATIC_CALLBACKS
+#include <vorbis/vorbisfile.h>
+
+// The OGG codec can return the samples in a number of different formats,
+// we use the standard signed short format.
+#define OGG_SAMPLEWIDTH 2
+
+// Q3 OGG codec
+snd_codec_t ogg_codec =
+{
+	".ogg",
+	S_OGG_CodecLoad,
+	S_OGG_CodecOpenStream,
+	S_OGG_CodecReadStream,
+	S_OGG_CodecCloseStream,
+	NULL
+};
+
+// callbacks for vobisfile
+
+// fread() replacement
+size_t S_OGG_Callback_read(void *ptr, size_t size, size_t nmemb, void *datasource)
+{
+	snd_stream_t *stream;
+	int byteSize = 0;
+	int bytesRead = 0;
+	size_t nMembRead = 0;
+
+	// check if input is valid
+	if(!ptr)
+	{
+		errno = EFAULT; 
+		return 0;
+	}
+	
+	if(!(size && nmemb))
+	{
+		// It's not an error, caller just wants zero bytes!
+		errno = 0;
+		return 0;
+	}
+ 
+	if(!datasource)
+	{
+		errno = EBADF; 
+		return 0;
+	}
+	
+	// we use a snd_stream_t in the generic pointer to pass around
+	stream = (snd_stream_t *) datasource;
+
+	// FS_Read does not support multi-byte elements
+	byteSize = nmemb * size;
+
+	// read it with the Q3 function FS_Read()
+	bytesRead = FS_Read(ptr, byteSize, stream->file);
+
+	// update the file position
+	stream->pos += bytesRead;
+
+	// this function returns the number of elements read not the number of bytes
+	nMembRead = bytesRead / size;
+
+	// even if the last member is only read partially
+	// it is counted as a whole in the return value	
+	if(bytesRead % size)
+	{
+		nMembRead++;
+	}
+	
+	return nMembRead;
+}
+
+// fseek() replacement
+int S_OGG_Callback_seek(void *datasource, ogg_int64_t offset, int whence)
+{
+	snd_stream_t *stream;
+	int retVal = 0;
+
+	// check if input is valid
+	if(!datasource)
+	{
+		errno = EBADF; 
+		return -1;
+	}
+
+	// snd_stream_t in the generic pointer
+	stream = (snd_stream_t *) datasource;
+
+	// we must map the whence to its Q3 counterpart
+	switch(whence)
+	{
+		case SEEK_SET :
+		{
+			// set the file position in the actual file with the Q3 function
+			retVal = FS_Seek(stream->file, (long) offset, FS_SEEK_SET);
+
+			// something has gone wrong, so we return here
+			if(retVal < 0)
+			{
+			 return retVal;
+			}
+
+			// keep track of file position
+			stream->pos = (int) offset;
+			break;
+		}
+  
+		case SEEK_CUR :
+		{
+			// set the file position in the actual file with the Q3 function
+			retVal = FS_Seek(stream->file, (long) offset, FS_SEEK_CUR);
+
+			// something has gone wrong, so we return here
+			if(retVal < 0)
+			{
+			 return retVal;
+			}
+
+			// keep track of file position
+			stream->pos += (int) offset;
+			break;
+		}
+ 
+		case SEEK_END :
+		{
+			// Quake 3 seems to have trouble with FS_SEEK_END 
+			// so we use the file length and FS_SEEK_SET
+
+			// set the file position in the actual file with the Q3 function
+			retVal = FS_Seek(stream->file, (long) stream->length + (long) offset, FS_SEEK_SET);
+
+			// something has gone wrong, so we return here
+			if(retVal < 0)
+			{
+			 return retVal;
+			}
+
+			// keep track of file position
+			stream->pos = stream->length + (int) offset;
+			break;
+		}
+  
+		default :
+		{
+			// unknown whence, so we return an error
+			errno = EINVAL;
+			return -1;
+		}
+	}
+
+	// stream->pos shouldn't be smaller than zero or bigger than the filesize
+	stream->pos = (stream->pos < 0) ? 0 : stream->pos;
+	stream->pos = (stream->pos > stream->length) ? stream->length : stream->pos;
+
+	return 0;
+}
+
+// fclose() replacement
+int S_OGG_Callback_close(void *datasource)
+{
+	// we do nothing here and close all things manually in S_OGG_CodecCloseStream()
+	return 0;
+}
+
+// ftell() replacement
+long S_OGG_Callback_tell(void *datasource)
+{
+	snd_stream_t   *stream;
+
+	// check if input is valid
+	if(!datasource)
+	{
+		errno = EBADF;
+		return -1;
+	}
+
+	// snd_stream_t in the generic pointer
+	stream = (snd_stream_t *) datasource;
+
+	return (long) FS_FTell(stream->file);
+}
+
+// the callback structure
+const ov_callbacks S_OGG_Callbacks =
+{
+ &S_OGG_Callback_read,
+ &S_OGG_Callback_seek,
+ &S_OGG_Callback_close,
+ &S_OGG_Callback_tell
+};
+
+/*
+=================
+S_OGG_CodecOpenStream
+=================
+*/
+snd_stream_t *S_OGG_CodecOpenStream(const char *filename)
+{
+	snd_stream_t *stream;
+
+	// OGG codec control structure
+	OggVorbis_File *vf;
+
+	// some variables used to get informations about the OGG 
+	vorbis_info *OGGInfo;
+	ogg_int64_t numSamples;
+
+	// check if input is valid
+	if(!filename)
+	{
+		return NULL;
+	}
+
+	// Open the stream
+	stream = S_CodecUtilOpen(filename, &ogg_codec);
+	if(!stream)
+	{
+		return NULL;
+	}
+
+	// alloctate the OggVorbis_File
+	vf = Z_Malloc(sizeof(OggVorbis_File));
+	if(!vf)
+	{
+		S_CodecUtilClose(&stream);
+
+		return NULL;
+	}
+
+	// open the codec with our callbacks and stream as the generic pointer
+	if(ov_open_callbacks(stream, vf, NULL, 0, S_OGG_Callbacks) != 0)
+	{
+		Z_Free(vf);
+
+		S_CodecUtilClose(&stream);
+
+		return NULL;
+	}
+
+	// the stream must be seekable
+	if(!ov_seekable(vf))
+	{
+		ov_clear(vf);
+
+		Z_Free(vf);
+
+		S_CodecUtilClose(&stream);
+
+		return NULL;
+	}
+ 
+	// we only support OGGs with one substream
+	if(ov_streams(vf) != 1)
+	{
+		ov_clear(vf);
+
+		Z_Free(vf);
+
+		S_CodecUtilClose(&stream);
+
+		return NULL;  
+	}
+
+	// get the info about channels and rate
+	OGGInfo = ov_info(vf, 0);
+	if(!OGGInfo)
+	{
+		ov_clear(vf);
+
+		Z_Free(vf);
+
+		S_CodecUtilClose(&stream);
+
+		return NULL;  
+	}
+
+	// get the number of sample-frames in the OGG
+	numSamples = ov_pcm_total(vf, 0);
+
+	// fill in the info-structure in the stream
+	stream->info.rate = OGGInfo->rate;
+	stream->info.width = OGG_SAMPLEWIDTH;
+	stream->info.channels = OGGInfo->channels;
+	stream->info.samples = numSamples;
+	stream->info.size = stream->info.samples * stream->info.channels * stream->info.width;
+	stream->info.dataofs = 0;
+
+	// We use stream->pos for the file pointer in the compressed ogg file 
+	stream->pos = 0;
+	
+	// We use the generic pointer in stream for the OGG codec control structure
+	stream->ptr = vf;
+
+	return stream;
+}
+
+/*
+=================
+S_OGG_CodecCloseStream
+=================
+*/
+void S_OGG_CodecCloseStream(snd_stream_t *stream)
+{
+	// check if input is valid
+	if(!stream)
+	{
+		return;
+	}
+	
+	// let the OGG codec cleanup its stuff
+	ov_clear((OggVorbis_File *) stream->ptr);
+
+	// free the OGG codec control struct
+	Z_Free(stream->ptr);
+
+	// close the stream
+	S_CodecUtilClose(&stream);
+}
+
+/*
+=================
+S_OGG_CodecReadStream
+=================
+*/
+int S_OGG_CodecReadStream(snd_stream_t *stream, int bytes, void *buffer)
+{
+	// buffer handling
+	int bytesRead, bytesLeft, c;
+	char *bufPtr;
+	
+	// Bitstream for the decoder
+	int BS = 0;
+
+	// big endian machines want their samples in big endian order
+	int IsBigEndian = 0;
+
+#	ifdef Q3_BIG_ENDIAN
+	IsBigEndian = 1;
+#	endif // Q3_BIG_ENDIAN
+
+	// check if input is valid
+	if(!(stream && buffer))
+	{
+		return 0;
+	}
+
+	if(bytes <= 0)
+	{
+		return 0;
+	}
+
+	bytesRead = 0;
+	bytesLeft = bytes;
+	bufPtr = buffer;
+
+	// cycle until we have the requested or all available bytes read
+	while(-1)
+	{
+		// read some bytes from the OGG codec
+		c = ov_read((OggVorbis_File *) stream->ptr, bufPtr, bytesLeft, IsBigEndian, OGG_SAMPLEWIDTH, 1, &BS);
+		
+		// no more bytes are left
+		if(c <= 0)
+		{
+			break;
+		}
+
+		bytesRead += c;
+		bytesLeft -= c;
+		bufPtr += c;
+  
+		// we have enough bytes
+		if(bytesLeft <= 0)
+		{
+			break;
+		}
+	}
+
+	return bytesRead;
+}
+
+/*
+=====================================================================
+S_OGG_CodecLoad
+
+We handle S_OGG_CodecLoad as a special case of the streaming functions 
+where we read the whole stream at once.
+======================================================================
+*/
+void *S_OGG_CodecLoad(const char *filename, snd_info_t *info)
+{
+	snd_stream_t *stream;
+	byte *buffer;
+	int bytesRead;
+	
+	// check if input is valid
+	if(!(filename && info))
+	{
+		return NULL;
+	}
+	
+	// open the file as a stream
+	stream = S_OGG_CodecOpenStream(filename);
+	if(!stream)
+	{
+		return NULL;
+	}
+	
+	// copy over the info
+	info->rate = stream->info.rate;
+	info->width = stream->info.width;
+	info->channels = stream->info.channels;
+	info->samples = stream->info.samples;
+	info->size = stream->info.size;
+	info->dataofs = stream->info.dataofs;
+
+	// allocate a buffer
+	// this buffer must be free-ed by the caller of this function
+    	buffer = Z_Malloc(info->size);
+	if(!buffer)
+	{
+		S_OGG_CodecCloseStream(stream);
+	
+		return NULL;	
+	}
+
+	// fill the buffer
+	bytesRead = S_OGG_CodecReadStream(stream, info->size, buffer);
+	
+	// we don't even have read a single byte
+	if(bytesRead <= 0)
+	{
+		Z_Free(buffer);
+		S_OGG_CodecCloseStream(stream);
+
+		return NULL;	
+	}
+
+	S_OGG_CodecCloseStream(stream);
+	
+	return buffer;
+}
+
+#endif // USE_CODEC_VORBIS