Tarball conversion

1 files changed, 250 insertions, 0 deletions

diff --git a/src/ogg.c b/src/ogg.c
new file mode 100644
index 0000000..d868fdb
--- /dev/null
+++ b/src/ogg.c
@@ -0,0 +1,250 @@
+/*
+** Copyright (C) 2002-2011 Erik de Castro Lopo <erikd@mega-nerd.com>
+** Copyright (C) 2007 John ffitch
+**
+** This program is free software ; you can redistribute it and/or modify
+** it under the terms of the GNU Lesser General Public License as published by
+** the Free Software Foundation ; either version 2.1 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 Lesser General Public License for more details.
+**
+** You should have received a copy of the GNU Lesser General Public License
+** along with this program ; if not, write to the Free Software
+** Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA.
+*/
+
+#include "sfconfig.h"
+
+#include <stdio.h>
+#include <fcntl.h>
+#include <string.h>
+#include <ctype.h>
+#include <time.h>
+#include <math.h>
+
+#if HAVE_UNISTD_H
+#include <unistd.h>
+#endif
+
+#include "sndfile.h"
+#include "sfendian.h"
+#include "common.h"
+
+#if HAVE_EXTERNAL_LIBS
+
+#include <ogg/ogg.h>
+
+#include "ogg.h"
+
+static int	ogg_close (SF_PRIVATE *psf) ;
+static int	ogg_stream_classify (SF_PRIVATE *psf, OGG_PRIVATE * odata) ;
+static int	ogg_page_classify (SF_PRIVATE * psf, const ogg_page * og) ;
+
+int
+ogg_open (SF_PRIVATE *psf)
+{	OGG_PRIVATE* odata = calloc (1, sizeof (OGG_PRIVATE)) ;
+	sf_count_t pos = psf_ftell (psf) ;
+	int	error = 0 ;
+
+	psf->container_data = odata ;
+	psf->container_close = ogg_close ;
+
+	if (psf->file.mode == SFM_RDWR)
+		return SFE_BAD_MODE_RW ;
+
+	if (psf->file.mode == SFM_READ)
+		if ((error = ogg_stream_classify (psf, odata)) != 0)
+			return error ;
+
+	/* Reset everything to an initial state. */
+	ogg_sync_clear (&odata->osync) ;
+	ogg_stream_clear (&odata->ostream) ;
+	psf_fseek (psf, pos, SEEK_SET) ;
+
+	switch (psf->sf.format)
+	{	case SF_FORMAT_OGG | SF_FORMAT_VORBIS :
+			return ogg_vorbis_open (psf) ;
+
+		case SF_FORMAT_OGGFLAC :
+			free (psf->container_data) ;
+			psf->container_data = NULL ;
+			psf->container_close = NULL ;
+			return flac_open (psf) ;
+
+#if ENABLE_EXPERIMENTAL_CODE
+		case SF_FORMAT_OGG | SF_FORMAT_SPEEX :
+			return ogg_speex_open (psf) ;
+
+		case SF_FORMAT_OGG | SF_FORMAT_PCM_16 :
+		case SF_FORMAT_OGG | SF_FORMAT_PCM_24 :
+			return ogg_pcm_open (psf) ;
+#endif
+
+		default :
+			break ;
+		} ;
+
+	psf_log_printf (psf, "%s : mode should be SFM_READ or SFM_WRITE.\n", __func__) ;
+	return SFE_INTERNAL ;
+} /* ogg_open */
+
+
+static int
+ogg_close (SF_PRIVATE *psf)
+{	OGG_PRIVATE* odata = psf->container_data ;
+
+	ogg_sync_clear (&odata->osync) ;
+	ogg_stream_clear (&odata->ostream) ;
+
+	return 0 ;
+} /* ogg_close */
+
+static int
+ogg_stream_classify (SF_PRIVATE *psf, OGG_PRIVATE* odata)
+{	char *buffer ;
+	int	 bytes, nn ;
+
+	/* Call this here so it only gets called once, so no memory is leaked. */
+	ogg_sync_init (&odata->osync) ;
+
+	odata->eos = 0 ;
+
+	/* Weird stuff happens if these aren't called. */
+	ogg_stream_reset (&odata->ostream) ;
+	ogg_sync_reset (&odata->osync) ;
+
+	/*
+	**	Grab some data at the head of the stream.  We want the first page
+	**	(which is guaranteed to be small and only contain the Vorbis
+	**	stream initial header) We need the first page to get the stream
+	**	serialno.
+	*/
+
+	/* Expose the buffer */
+	buffer = ogg_sync_buffer (&odata->osync, 4096L) ;
+
+	/* Grab the part of the header that has already been read. */
+	memcpy (buffer, psf->header, psf->headindex) ;
+	bytes = psf->headindex ;
+
+	/* Submit a 4k block to libvorbis' Ogg layer */
+	bytes += psf_fread (buffer + psf->headindex, 1, 4096 - psf->headindex, psf) ;
+	ogg_sync_wrote (&odata->osync, bytes) ;
+
+	/* Get the first page. */
+	if ((nn = ogg_sync_pageout (&odata->osync, &odata->opage)) != 1)
+	{
+		/* Have we simply run out of data?  If so, we're done. */
+		if (bytes < 4096)
+			return 0 ;
+
+		/* Error case.  Must not be Vorbis data */
+		psf_log_printf (psf, "Input does not appear to be an Ogg bitstream.\n") ;
+		return SFE_MALFORMED_FILE ;
+		} ;
+
+	/*
+	**	Get the serial number and set up the rest of decode.
+	**	Serialno first ; use it to set up a logical stream.
+	*/
+	ogg_stream_clear (&odata->ostream) ;
+	ogg_stream_init (&odata->ostream, ogg_page_serialno (&odata->opage)) ;
+
+	if (ogg_stream_pagein (&odata->ostream, &odata->opage) < 0)
+	{	/* Error ; stream version mismatch perhaps. */
+		psf_log_printf (psf, "Error reading first page of Ogg bitstream data\n") ;
+		return SFE_MALFORMED_FILE ;
+		} ;
+
+	if (ogg_stream_packetout (&odata->ostream, &odata->opacket) != 1)
+	{	/* No page? must not be vorbis. */
+		psf_log_printf (psf, "Error reading initial header packet.\n") ;
+		return SFE_MALFORMED_FILE ;
+		} ;
+
+	odata->codec = ogg_page_classify (psf, &odata->opage) ;
+
+	switch (odata->codec)
+	{	case OGG_VORBIS :
+			psf->sf.format = SF_FORMAT_OGG | SF_FORMAT_VORBIS ;
+			return 0 ;
+
+		case OGG_FLAC :
+		case OGG_FLAC0 :
+			psf->sf.format = SF_FORMAT_OGGFLAC ;
+			return 0 ;
+
+		case OGG_SPEEX :
+			psf->sf.format = SF_FORMAT_OGG | SF_FORMAT_SPEEX ;
+			return 0 ;
+
+		case OGG_PCM :
+			psf_log_printf (psf, "Detected Ogg/PCM data. This is not supported yet.\n") ;
+			return SFE_UNIMPLEMENTED ;
+
+		default :
+			break ;
+		} ;
+
+	psf_log_printf (psf, "This Ogg bitstream contains some uknown data type.\n") ;
+	return SFE_UNIMPLEMENTED ;
+} /* ogg_stream_classify */
+
+/*==============================================================================
+*/
+
+static struct
+{	const char *str, *name ;
+	int len, codec ;
+} codec_lookup [] =
+{	{	"Annodex",		"Annodex",	8, OGG_ANNODEX },
+	{	"AnxData",		"AnxData",	7, OGG_ANXDATA },
+	{	"\177FLAC",		"Flac1",	5, OGG_FLAC },
+	{	"fLaC",			"Flac0",	4, OGG_FLAC0 },
+	{	"PCM     ",		"PCM",		8, OGG_PCM },
+	{	"Speex",		"Speex",	5, OGG_SPEEX },
+	{	"\001vorbis",	"Vorbis",	7, OGG_VORBIS },
+} ;
+
+static int
+ogg_page_classify (SF_PRIVATE * psf, const ogg_page * og)
+{	int k, len ;
+
+	for (k = 0 ; k < ARRAY_LEN (codec_lookup) ; k++)
+	{	if (codec_lookup [k].len > og->body_len)
+			continue ;
+
+		if (memcmp (og->body, codec_lookup [k].str, codec_lookup [k].len) == 0)
+		{	psf_log_printf (psf, "Ogg stream data : %s\n", codec_lookup [k].name) ;
+			psf_log_printf (psf, "Stream serialno : %010D\n", (int64_t) ogg_page_serialno (og)) ;
+			return codec_lookup [k].codec ;
+			} ;
+		} ;
+
+	len = og->body_len < 8 ? og->body_len : 8 ;
+
+	psf_log_printf (psf, "Ogg_stream data : '") ;
+	for (k = 0 ; k < len ; k++)
+		psf_log_printf (psf, "%c", isprint (og->body [k]) ? og->body [k] : '.') ;
+	psf_log_printf (psf, "'     ") ;
+	for (k = 0 ; k < len ; k++)
+		psf_log_printf (psf, " %02x", og->body [k] & 0xff) ;
+	psf_log_printf (psf, "\n") ;
+
+	return 0 ;
+} /* ogg_page_classify */
+
+#else /* HAVE_EXTERNAL_LIBS */
+
+int
+ogg_open	(SF_PRIVATE *psf)
+{
+	psf_log_printf (psf, "This version of libsndfile was compiled without Ogg/Vorbis support.\n") ;
+	return SFE_UNIMPLEMENTED ;
+} /* ogg_open */
+
+#endif