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/* G726decode.c
* G.726 codec
*
* $Id$
*
* Wireshark - Network traffic analyzer
* By Gerald Combs <gerald@wireshark.org>
* Copyright 1998 Gerald Combs
*
* This program 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.
*
* 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 General Public License for more details.
*
* You should have received a copy of the GNU General Public License
* along with this program; if not, write to the Free Software
* Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA.
*/
#include "config.h"
#include <glib.h>
#ifdef HAVE_SPANDSP
#include "telephony.h"
#include "bitstream.h"
#include "g726.h"
#endif
#include "G726decode.h"
#ifdef HAVE_SPANDSP
/* this isn't reentrant. Making it might involve quite a few changes to be able to pass a g726 state
* variable to the various functions involved in G.726 decoding.
*/
static g726_state_t state;
#endif
/* Currently, only G.726-32, linear encoding, left packed is supported */
void initG726_32(void)
{
#ifdef HAVE_SPANDSP
memset (&state, 0, sizeof (state));
g726_init(&state, 32000, 0, 1);
#endif
}
/* Packing should be user defined (via the decode dialog) since due to historical reasons two diverging
* de facto standards are in use today (see RFC3551).
*/
#ifdef HAVE_SPANDSP
#define _U_NOSPANDSP_
#else
#define _U_NOSPANDSP_ _U_
#endif
int
decodeG726_32(void *input _U_NOSPANDSP_, int inputSizeBytes _U_NOSPANDSP_,
void *output _U_NOSPANDSP_, int *outputSizeBytes _U_NOSPANDSP_)
{
#ifdef HAVE_SPANDSP
*outputSizeBytes = 2 * g726_decode(&state, output, (void*) input, inputSizeBytes);
#endif
return 0;
}
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