/* G711adecode.c
 * A-law G.711 codec
 *
 * 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>

#include "G711adecode.h"
#include "G711atable.h"

void *
codec_g711a_init(void)
{
    return NULL;
}

void
codec_g711a_release(void *ctx _U_)
{

}

unsigned
codec_g711a_get_channels(void *ctx _U_)
{
    return 1;
}

unsigned
codec_g711a_get_frequency(void *ctx _U_)
{
    return 8000;
}

size_t
codec_g711a_decode(void *ctx _U_, const void *input, size_t inputSizeBytes, void *output,
        size_t *outputSizeBytes)
{
    const guint8 *dataIn = (const guint8 *) input;
    gint16       *dataOut = (gint16 *) output;
    size_t       i;

    if (!output || !outputSizeBytes) {
        return inputSizeBytes * 2;
    }

    for (i = 0; i < inputSizeBytes; i++)
    {
        dataOut[i] = alaw_exp_table[dataIn[i]];
    }

    *outputSizeBytes = inputSizeBytes * 2;
    return inputSizeBytes * 2;
}

/*
 * Editor modelines  -  http://www.wireshark.org/tools/modelines.html
 *
 * Local variables:
 * c-basic-offset: 4
 * tab-width: 8
 * indent-tabs-mode: nil
 * End:
 *
 * vi: set shiftwidth=4 tabstop=8 expandtab:
 * :indentSize=4:tabSize=8:noTabs=true:
 */