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/* GSL - Generic Sound Layer
* Copyright (C) 1998, 2000, 2001 Tim Janik
*
* This library 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 of the License, or (at your option) any later version.
*
* This library 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 library; if not, write to the
* Free Software Foundation, Inc., 59 Temple Place, Suite 330,
* Boston, MA 02111-1307, USA.
*/
#include "gsl/gslloader.h"
#if GSL_HAVE_OGGVORBIS
#include <gsl/gsldatahandle.h>
#include "gsldatahandle-vorbis.h"
#include <vorbis/vorbisfile.h>
#include <string.h>
#include <unistd.h>
/* --- structures --- */
typedef struct
{
GslWaveFileInfo wfi;
OggVorbis_File ofile;
} FileInfo;
/* --- functions --- */
static GslWaveFileInfo*
oggv_load_file_info (gpointer data,
const gchar *file_name,
GslErrorType *error_p)
{
FileInfo *fi = gsl_new_struct0 (FileInfo, 1);
FILE *file;
gint err, i;
file = fopen (file_name, "r");
if (!file)
{
*error_p = GSL_ERROR_OPEN_FAILED;
return NULL;
}
fi = gsl_new_struct0 (FileInfo, 1);
err = ov_open (file, &fi->ofile, NULL, 0);
if (err)
{
fclose (file);
gsl_delete_struct (FileInfo, fi);
*error_p = GSL_ERROR_CODEC_FAILURE;
return NULL;
}
fi->wfi.n_waves = ov_streams (&fi->ofile);
fi->wfi.waves = g_malloc0 (sizeof (fi->wfi.waves[0]) * fi->wfi.n_waves);
for (i = 0; i < fi->wfi.n_waves; i++)
{
vorbis_comment *vc = ov_comment (&fi->ofile, i);
guint n;
for (n = 0; n < vc->comments; n++)
if (strcmp (vc->user_comments[n], "title=") == 0)
break;
if (n < vc->comments)
fi->wfi.waves[i].name = g_strdup (vc->user_comments[n] + 6);
else
fi->wfi.waves[i].name = g_strdup_printf ("Unnamed-%u", i);
}
return &fi->wfi;
}
static void
oggv_free_file_info (gpointer data,
GslWaveFileInfo *file_info)
{
FileInfo *fi = (FileInfo*) file_info;
guint i;
for (i = 0; i < fi->wfi.n_waves; i++)
g_free (fi->wfi.waves[i].name);
g_free (fi->wfi.waves);
ov_clear (&fi->ofile);
gsl_delete_struct (FileInfo, fi);
}
static GslWaveDsc*
oggv_load_wave_dsc (gpointer data,
GslWaveFileInfo *file_info,
guint nth_wave,
GslErrorType *error_p)
{
FileInfo *fi = (FileInfo*) file_info;
GslWaveDsc *wdsc = gsl_new_struct0 (GslWaveDsc, 1);
vorbis_info *vi = ov_info (&fi->ofile, nth_wave);
wdsc->name = g_strdup (fi->wfi.waves[nth_wave].name);
wdsc->n_channels = vi->channels;
wdsc->n_chunks = 1;
wdsc->chunks = g_new0 (GslWaveChunkDsc, 1);
wdsc->chunks[0].osc_freq = 440.0; /* FIXME */
wdsc->chunks[0].mix_freq = vi->rate;
wdsc->chunks[0].loader_offset = nth_wave; /* lbitstream */
return wdsc;
}
static void
oggv_free_wave_dsc (gpointer data,
GslWaveDsc *wdsc)
{
g_free (wdsc->name);
g_free (wdsc->chunks);
gsl_delete_struct (GslWaveDsc, wdsc);
}
static GslDataHandle*
oggv_create_chunk_handle (gpointer data,
GslWaveDsc *wdsc,
guint nth_chunk,
GslErrorType *error_p)
{
FileInfo *fi = (FileInfo*) wdsc->file_info;
GslDataHandle *dhandle;
g_return_val_if_fail (nth_chunk == 0, NULL);
dhandle = gsl_data_handle_new_ogg_vorbis (fi->wfi.file_name,
wdsc->chunks[0].loader_offset); /* lbitstream */
if (!dhandle)
*error_p = GSL_ERROR_OPEN_FAILED;
return dhandle;
}
void
_gsl_init_loader_oggvorbis (void)
{
static const gchar *file_exts[] = { "ogg", NULL, };
static const gchar *mime_types[] = { "application/x-ogg", "audio/x-vorbis", "audio/x-ogg", NULL, };
static const gchar *magics[] = { "0 string OggS\n" "29 string vorbis", NULL, };
static GslLoader loader = {
"Ogg/Vorbis",
file_exts,
mime_types,
magics,
0, /* priority */
NULL,
oggv_load_file_info,
oggv_free_file_info,
oggv_load_wave_dsc,
oggv_free_wave_dsc,
oggv_create_chunk_handle,
};
static gboolean initialized = FALSE;
g_assert (initialized == FALSE);
initialized = TRUE;
gsl_loader_register (&loader);
}
#else
void
_gsl_init_loader_oggvorbis (void)
{
/* dummy */
}
#endif /* GSL_HAVE_OGGVORBIS */
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