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Original commit message from CVS: * gst/rtp/Makefile.am: * gst/rtp/gstrtp.c: (plugin_init): * gst/rtp/gstrtpamrdec.c: (gst_rtpamrdec_get_type), (gst_rtpamrdec_base_init), (gst_rtpamrdec_class_init), (gst_rtpamrdec_init), (gst_rtpamrdec_chain), (gst_rtpamrdec_set_property), (gst_rtpamrdec_get_property), (gst_rtpamrdec_change_state), (gst_rtpamrdec_plugin_init): * gst/rtp/gstrtpamrdec.h: * gst/rtp/gstrtpamrenc.c: (gst_rtpamrenc_get_type), (gst_rtpamrenc_base_init), (gst_rtpamrenc_class_init), (gst_rtpamrenc_init), (gst_rtpamrenc_chain), (gst_rtpamrenc_set_property), (gst_rtpamrenc_get_property), (gst_rtpamrenc_change_state), (gst_rtpamrenc_plugin_init): * gst/rtp/gstrtpamrenc.h: * gst/rtp/gstrtpmpaenc.c: (gst_rtpmpaenc_class_init), (gst_rtpmpaenc_flush), (gst_rtpmpaenc_chain): Added very simplistic amr payloader. depayloader does not work yet.
285 lines
7.2 KiB
C
285 lines
7.2 KiB
C
/* GStreamer
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* Copyright (C) <2005> Wim Taymans <wim@fluendo.com>
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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 <string.h>
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#include <gst/rtp/gstrtpbuffer.h>
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#include "gstrtpamrenc.h"
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/* elementfactory information */
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static GstElementDetails gst_rtp_amrenc_details = {
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"RTP packet parser",
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"Codec/Parser/Network",
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"Encode AMR audio into RTP packets",
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"Wim Taymans <wim@fluendo.com>"
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};
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/* RtpAMREnc signals and args */
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enum
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{
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/* FILL ME */
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LAST_SIGNAL
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};
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#define DEFAULT_MTU 1024
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enum
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{
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PROP_0,
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PROP_MTU
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};
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static GstStaticPadTemplate gst_rtpamrenc_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-amr-nb, channels=(int)1, rate=(int)8000")
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);
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static GstStaticPadTemplate gst_rtpamrenc_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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);
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static void gst_rtpamrenc_class_init (GstRtpAMREncClass * klass);
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static void gst_rtpamrenc_base_init (GstRtpAMREncClass * klass);
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static void gst_rtpamrenc_init (GstRtpAMREnc * rtpamrenc);
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static GstFlowReturn gst_rtpamrenc_chain (GstPad * pad, GstBuffer * buffer);
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static void gst_rtpamrenc_set_property (GObject * object, guint prop_id,
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const GValue * value, GParamSpec * pspec);
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static void gst_rtpamrenc_get_property (GObject * object, guint prop_id,
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GValue * value, GParamSpec * pspec);
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static GstElementStateReturn gst_rtpamrenc_change_state (GstElement * element);
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static GstElementClass *parent_class = NULL;
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static GType
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gst_rtpamrenc_get_type (void)
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{
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static GType rtpamrenc_type = 0;
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if (!rtpamrenc_type) {
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static const GTypeInfo rtpamrenc_info = {
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sizeof (GstRtpAMREncClass),
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(GBaseInitFunc) gst_rtpamrenc_base_init,
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NULL,
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(GClassInitFunc) gst_rtpamrenc_class_init,
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NULL,
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NULL,
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sizeof (GstRtpAMREnc),
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0,
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(GInstanceInitFunc) gst_rtpamrenc_init,
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};
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rtpamrenc_type =
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g_type_register_static (GST_TYPE_ELEMENT, "GstRtpAMREnc",
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&rtpamrenc_info, 0);
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}
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return rtpamrenc_type;
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}
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static void
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gst_rtpamrenc_base_init (GstRtpAMREncClass * klass)
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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_rtpamrenc_src_template));
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gst_element_class_add_pad_template (element_class,
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gst_static_pad_template_get (&gst_rtpamrenc_sink_template));
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gst_element_class_set_details (element_class, &gst_rtp_amrenc_details);
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}
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static void
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gst_rtpamrenc_class_init (GstRtpAMREncClass * klass)
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{
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GObjectClass *gobject_class;
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GstElementClass *gstelement_class;
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gobject_class = (GObjectClass *) klass;
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gstelement_class = (GstElementClass *) klass;
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parent_class = g_type_class_ref (GST_TYPE_ELEMENT);
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gobject_class->set_property = gst_rtpamrenc_set_property;
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gobject_class->get_property = gst_rtpamrenc_get_property;
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g_object_class_install_property (G_OBJECT_CLASS (klass), PROP_MTU,
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g_param_spec_uint ("mtu", "MTU",
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"Maximum size of one packet",
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28, G_MAXUINT, DEFAULT_MTU, G_PARAM_READWRITE));
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gstelement_class->change_state = gst_rtpamrenc_change_state;
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}
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static void
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gst_rtpamrenc_init (GstRtpAMREnc * rtpamrenc)
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{
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rtpamrenc->srcpad =
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gst_pad_new_from_template (gst_static_pad_template_get
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(&gst_rtpamrenc_src_template), "src");
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gst_element_add_pad (GST_ELEMENT (rtpamrenc), rtpamrenc->srcpad);
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rtpamrenc->sinkpad =
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gst_pad_new_from_template (gst_static_pad_template_get
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(&gst_rtpamrenc_sink_template), "sink");
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gst_pad_set_chain_function (rtpamrenc->sinkpad, gst_rtpamrenc_chain);
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gst_element_add_pad (GST_ELEMENT (rtpamrenc), rtpamrenc->sinkpad);
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rtpamrenc->mtu = DEFAULT_MTU;
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}
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static GstFlowReturn
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gst_rtpamrenc_chain (GstPad * pad, GstBuffer * buffer)
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{
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GstRtpAMREnc *rtpamrenc;
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GstFlowReturn ret;
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guint size, payload_len;
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GstBuffer *outbuf;
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guint8 *payload;
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GstClockTime timestamp;
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rtpamrenc = GST_RTP_AMR_ENC (gst_pad_get_parent (pad));
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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 AMR frame per RTP packet for now,
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* octet aligned, no interleaving, single channel, no CRC,
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* no robust-sorting. */
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payload_len = size + 2;
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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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g_assert (GST_BUFFER_SIZE (outbuf) < rtpamrenc->mtu);
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gst_rtpbuffer_set_seq (outbuf, rtpamrenc->seqnum++);
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gst_rtpbuffer_set_timestamp (outbuf, timestamp * 8000 / GST_SECOND);
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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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/* 0 1 2 3 4 5 6 7
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* +-+-+-+-+-+-+-+-+
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* | CMR |R|R|R|R|
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* +-+-+-+-+-+-+-+-+
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*/
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payload[0] = 0xF0; /* CMR, no specific mode requested */
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/* 0 1 2 3 4 5 6 7
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* +-+-+-+-+-+-+-+-+
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* |F| FT |Q|P|P|
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* +-+-+-+-+-+-+-+-+
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*/
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payload[1] = 0x04; /* ToC, no damage (Q=1) */
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/* copy data in payload */
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memcpy (&payload[2], GST_BUFFER_DATA (buffer), size);
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gst_buffer_unref (buffer);
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ret = gst_pad_push (rtpamrenc->srcpad, outbuf);
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gst_object_unref (rtpamrenc);
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return ret;
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}
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static void
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gst_rtpamrenc_set_property (GObject * object, guint prop_id,
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const GValue * value, GParamSpec * pspec)
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{
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GstRtpAMREnc *rtpamrenc;
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rtpamrenc = GST_RTP_AMR_ENC (object);
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switch (prop_id) {
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case PROP_MTU:
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rtpamrenc->mtu = g_value_get_uint (value);
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break;
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default:
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G_OBJECT_WARN_INVALID_PROPERTY_ID (object, prop_id, pspec);
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break;
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}
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}
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static void
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gst_rtpamrenc_get_property (GObject * object, guint prop_id, GValue * value,
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GParamSpec * pspec)
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{
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GstRtpAMREnc *rtpamrenc;
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rtpamrenc = GST_RTP_AMR_ENC (object);
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switch (prop_id) {
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case PROP_MTU:
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g_value_set_uint (value, rtpamrenc->mtu);
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break;
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default:
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G_OBJECT_WARN_INVALID_PROPERTY_ID (object, prop_id, pspec);
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break;
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}
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}
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static GstElementStateReturn
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gst_rtpamrenc_change_state (GstElement * element)
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{
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GstRtpAMREnc *rtpamrenc;
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gint transition;
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GstElementStateReturn ret;
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rtpamrenc = GST_RTP_AMR_ENC (element);
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transition = GST_STATE_TRANSITION (element);
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switch (transition) {
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case GST_STATE_NULL_TO_READY:
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break;
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case GST_STATE_READY_TO_PAUSED:
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rtpamrenc->seqnum = 0;
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break;
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default:
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break;
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}
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ret = GST_ELEMENT_CLASS (parent_class)->change_state (element);
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switch (transition) {
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case GST_STATE_READY_TO_NULL:
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break;
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default:
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break;
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}
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return ret;
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}
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gboolean
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gst_rtpamrenc_plugin_init (GstPlugin * plugin)
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{
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return gst_element_register (plugin, "rtpamrenc",
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GST_RANK_NONE, GST_TYPE_RTP_AMR_ENC);
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}
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