alaw.c 2.45 KB
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/* GStreamer PCM/A-Law conversions
 *
 * This library is free software; you can redistribute it and/or
 * modify it under the terms of the GNU Library 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 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
 * Library General Public License for more details.
 *
 * You should have received a copy of the GNU Library 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.
 */

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#ifdef HAVE_CONFIG_H
#include "config.h"
#endif
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#include "alaw-encode.h"
#include "alaw-decode.h"

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#if G_BYTE_ORDER == G_LITTLE_ENDIAN
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#define INT_FORMAT "S16LE"
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#else
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#define INT_FORMAT "S16BE"
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#endif

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GstStaticPadTemplate alaw_dec_src_factory = GST_STATIC_PAD_TEMPLATE ("src",
    GST_PAD_SRC,
    GST_PAD_ALWAYS,
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    GST_STATIC_CAPS ("audio/x-raw, "
        "format = (string) " INT_FORMAT ", "
        "rate = (int) [ 8000, 192000 ], " "channels = (int) [ 1, 2 ]")
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    );
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GstStaticPadTemplate alaw_dec_sink_factory = GST_STATIC_PAD_TEMPLATE ("sink",
    GST_PAD_SINK,
    GST_PAD_ALWAYS,
    GST_STATIC_CAPS ("audio/x-alaw, "
        "rate = [ 8000 , 192000 ], " "channels = [ 1 , 2 ]")
    );

GstStaticPadTemplate alaw_enc_sink_factory = GST_STATIC_PAD_TEMPLATE ("sink",
    GST_PAD_SINK,
    GST_PAD_ALWAYS,
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    GST_STATIC_CAPS ("audio/x-raw, "
        "format = (string) " INT_FORMAT ", "
        "rate = (int) [ 8000, 192000 ], " "channels = (int) [ 1, 2 ]")
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    );
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GstStaticPadTemplate alaw_enc_src_factory = GST_STATIC_PAD_TEMPLATE ("src",
    GST_PAD_SRC,
    GST_PAD_ALWAYS,
    GST_STATIC_CAPS ("audio/x-alaw, "
        "rate = [ 8000 , 192000 ], " "channels = [ 1 , 2 ]")
    );
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static gboolean
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plugin_init (GstPlugin * plugin)
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{
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......  
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  if (!gst_element_register (plugin, "alawenc",
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          GST_RANK_PRIMARY, GST_TYPE_ALAW_ENC) ||
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      !gst_element_register (plugin, "alawdec",
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          GST_RANK_PRIMARY, GST_TYPE_ALAW_DEC))
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    return FALSE;
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  return TRUE;
}

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/* FIXME 0.11: merge alaw and mulaw into one plugin? */
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GST_PLUGIN_DEFINE (GST_VERSION_MAJOR,
    GST_VERSION_MINOR,
    "alaw",
    "ALaw audio conversion routines",
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    plugin_init, VERSION, GST_LICENSE, GST_PACKAGE_NAME, GST_PACKAGE_ORIGIN)