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/*
** 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
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