2005-10-25 19:19:38 +00:00
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/* GStreamer
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2005-10-26 14:50:59 +00:00
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* Copyright (C) <1999> Erik Walthinsen <omega@cse.ogi.edu>
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2005-10-26 20:28:32 +00:00
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* Copyright (C) <2005> Edgard Lima <edgard.lima@indt.org.br>
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2005-10-25 19:19:38 +00:00
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*
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* This library is free software; you can redistribute it and/or
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* modify it under the terms of the GNU Library General Public
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* License as published by the Free Software Foundation; either
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* version 2 of the License, or (at your option) any later version.
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*
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* This library is distributed in the hope that it will be useful,
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* but WITHOUT ANY WARRANTY; without even the implied warranty of
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
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* Library General Public License for more
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*/
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#ifdef HAVE_CONFIG_H
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# include "config.h"
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#endif
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#include <stdlib.h>
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#include <string.h>
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#include <gst/rtp/gstrtpbuffer.h>
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#include "gstrtpg711enc.h"
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/* elementfactory information */
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static GstElementDetails gst_rtpg711enc_details = {
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"RTP packet parser",
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"Codec/Encoder/Network",
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"Encodes PCMU/PCMA audio into a RTP packet",
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"Edgard Lima <edgard.lima@indt.org.br>"
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};
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static GstStaticPadTemplate gst_rtpg711enc_sink_template =
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GST_STATIC_PAD_TEMPLATE ("sink",
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GST_PAD_SINK,
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GST_PAD_ALWAYS,
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GST_STATIC_CAPS ("audio/x-mulaw, channels=(int)1, rate=(int)8000 ;"
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"audio/x-alaw, channels=(int)1, rate=(int)8000")
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);
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static GstStaticPadTemplate gst_rtpg711enc_src_template =
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GST_STATIC_PAD_TEMPLATE ("src",
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GST_PAD_SRC,
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GST_PAD_ALWAYS,
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GST_STATIC_CAPS ("application/x-rtp, "
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"media = (string) \"audio\", "
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"payload = (int) 0, "
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"clock-rate = (int) 8000, "
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"encoding-name = (string) \"PCMU\"; "
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"application/x-rtp, "
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"media = (string) \"audio\", "
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"payload = (int) 8, "
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"clock-rate = (int) 8000, " "encoding-name = (string) \"PCMA\"")
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);
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static gboolean gst_rtpg711enc_setcaps (GstBaseRTPPayload * payload,
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GstCaps * caps);
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static GstFlowReturn gst_rtpg711enc_handle_buffer (GstBaseRTPPayload * payload,
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GstBuffer * buffer);
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2005-10-26 14:50:59 +00:00
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GST_BOILERPLATE (GstRtpG711Enc, gst_rtpg711enc, GstBaseRTPPayload,
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GST_TYPE_BASE_RTP_PAYLOAD);
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2005-10-25 19:19:38 +00:00
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static void
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gst_rtpg711enc_base_init (gpointer klass)
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2005-10-25 19:19:38 +00:00
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{
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GstElementClass *element_class = GST_ELEMENT_CLASS (klass);
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gst_element_class_add_pad_template (element_class,
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gst_static_pad_template_get (&gst_rtpg711enc_sink_template));
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gst_element_class_add_pad_template (element_class,
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gst_static_pad_template_get (&gst_rtpg711enc_src_template));
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gst_element_class_set_details (element_class, &gst_rtpg711enc_details);
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}
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static void
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gst_rtpg711enc_class_init (GstRtpG711EncClass * klass)
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{
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GObjectClass *gobject_class;
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GstElementClass *gstelement_class;
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GstBaseRTPPayloadClass *gstbasertppayload_class;
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gobject_class = (GObjectClass *) klass;
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gstelement_class = (GstElementClass *) klass;
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gstbasertppayload_class = (GstBaseRTPPayloadClass *) klass;
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parent_class = g_type_class_ref (GST_TYPE_BASE_RTP_PAYLOAD);
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gstbasertppayload_class->set_caps = gst_rtpg711enc_setcaps;
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gstbasertppayload_class->handle_buffer = gst_rtpg711enc_handle_buffer;
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}
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static void
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2005-10-26 14:50:59 +00:00
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gst_rtpg711enc_init (GstRtpG711Enc * rtpg711enc, GstRtpG711EncClass * klass)
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2005-10-25 19:19:38 +00:00
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{
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2005-10-26 14:50:59 +00:00
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GST_BASE_RTP_PAYLOAD (rtpg711enc)->clock_rate = 8000;
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2005-10-25 19:19:38 +00:00
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}
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static gboolean
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gst_rtpg711enc_setcaps (GstBaseRTPPayload * payload, GstCaps * caps)
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{
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const char *stname;
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GstStructure *structure;
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structure = gst_caps_get_structure (caps, 0);
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stname = gst_structure_get_name (structure);
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if (0 == strcmp ("audio/x-mulaw", stname)) {
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gst_basertppayload_set_options (payload, "audio", TRUE, "PCMU", 8000);
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} else if (0 == strcmp ("audio/x-alaw", stname)) {
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gst_basertppayload_set_options (payload, "audio", TRUE, "PCMA", 8000);
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} else {
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return FALSE;
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}
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gst_basertppayload_set_outcaps (payload, NULL);
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return TRUE;
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}
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static GstFlowReturn
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gst_rtpg711enc_handle_buffer (GstBaseRTPPayload * basepayload,
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GstBuffer * buffer)
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{
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GstRtpG711Enc *rtpg711enc;
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guint size, payload_len;
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GstBuffer *outbuf;
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guint8 *payload, *data;
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GstClockTime timestamp;
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GstFlowReturn ret;
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rtpg711enc = GST_RTP_G711_ENC (basepayload);
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size = GST_BUFFER_SIZE (buffer);
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timestamp = GST_BUFFER_TIMESTAMP (buffer);
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/* FIXME, only one G711 frame per RTP packet for now */
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payload_len = size;
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outbuf = gst_rtpbuffer_new_allocate (payload_len, 0, 0);
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/* FIXME, assert for now */
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2005-10-26 14:50:59 +00:00
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g_assert (payload_len <= GST_BASE_RTP_PAYLOAD_MTU (rtpg711enc));
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/* copy timestamp */
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GST_BUFFER_TIMESTAMP (outbuf) = timestamp;
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/* get payload */
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payload = gst_rtpbuffer_get_payload (outbuf);
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data = GST_BUFFER_DATA (buffer);
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/* copy data in payload */
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memcpy (&payload[0], data, size);
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gst_buffer_unref (buffer);
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ret = gst_basertppayload_push (basepayload, outbuf);
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return ret;
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}
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gboolean
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gst_rtpg711enc_plugin_init (GstPlugin * plugin)
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{
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return gst_element_register (plugin, "rtpg711enc",
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GST_RANK_NONE, GST_TYPE_RTP_G711_ENC);
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}
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