Commit 7db7da1a authored by Tim-Philipp Müller's avatar Tim-Philipp Müller 🐠

rtp: add SMPTE 336M KLV metadata payloader

http://tools.ietf.org/html/rfc6597
parent 12930c2f
......@@ -50,6 +50,7 @@ libgstrtp_la_SOURCES = \
gstrtpj2kpay.c \
gstrtpjpegdepay.c \
gstrtpjpegpay.c \
gstrtpklvpay.c \
gstrtpL16depay.c \
gstrtpL16pay.c \
gstrtpL24depay.c \
......@@ -153,6 +154,7 @@ noinst_HEADERS = \
gstrtpj2kpay.h \
gstrtpjpegdepay.h \
gstrtpjpegpay.h \
gstrtpklvpay.h \
gstrtpmp1sdepay.h \
gstrtpmp2tdepay.h \
gstrtpmp2tpay.h \
......
......@@ -68,6 +68,7 @@
#include "gstrtpj2kpay.h"
#include "gstrtpjpegdepay.h"
#include "gstrtpjpegpay.h"
#include "gstrtpklvpay.h"
#include "gstrtpL16depay.h"
#include "gstrtpL16pay.h"
#include "gstrtpL24depay.h"
......@@ -242,6 +243,9 @@ plugin_init (GstPlugin * plugin)
if (!gst_rtp_jpeg_pay_plugin_init (plugin))
return FALSE;
if (!gst_rtp_klv_pay_plugin_init (plugin))
return FALSE;
if (!gst_rtp_L16_pay_plugin_init (plugin))
return FALSE;
......
/* GStreamer RTP KLV Payloader
* Copyright (C) 2014-2015 Tim-Philipp Müller <tim@centricular.com>>
* Copyright (C) 2014-2015 Centricular Ltd
*
* 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 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., 51 Franklin St, Fifth Floor,
* Boston, MA 02110-1301, USA.
*/
/**
* SECTION:element-rtpklvpay
* @see_also: rtpklvdepay
*
* Payloads KLV metadata into RTP packets according to RFC 6597.
* For detailed information see: http://tools.ietf.org/html/rfc6597
*
* <refsect2>
* <title>Example pipeline</title>
* |[
* gst-launch-1.0 filesrc location=video-with-klv.ts ! tsdemux ! rtpklvpay ! udpsink
* ]| This example pipeline will payload an RTP KLV stream extracted from an
* MPEG-TS stream and send it via UDP to an RTP receiver.
* </refsect2>
*/
#ifdef HAVE_CONFIG_H
#include "config.h"
#endif
#include "gstrtpklvpay.h"
#include <string.h>
GST_DEBUG_CATEGORY_STATIC (klvpay_debug);
#define GST_CAT_DEFAULT (klvpay_debug)
static GstStaticPadTemplate src_template = GST_STATIC_PAD_TEMPLATE ("src",
GST_PAD_SRC,
GST_PAD_ALWAYS,
GST_STATIC_CAPS ("application/x-rtp, "
"media = (string) application, clock-rate = (int) [1, MAX], "
"encoding-name = (string) SMPTE336M")
);
static GstStaticPadTemplate sink_template = GST_STATIC_PAD_TEMPLATE ("sink",
GST_PAD_SINK,
GST_PAD_ALWAYS,
GST_STATIC_CAPS ("meta/x-klv, parsed = (bool) true"));
#define gst_rtp_klv_pay_parent_class parent_class
G_DEFINE_TYPE (GstRtpKlvPay, gst_rtp_klv_pay, GST_TYPE_RTP_BASE_PAYLOAD);
static gboolean gst_rtp_klv_pay_setcaps (GstRTPBasePayload * pay,
GstCaps * caps);
static GstFlowReturn gst_rtp_klv_pay_handle_buffer (GstRTPBasePayload * pay,
GstBuffer * buf);
static void
gst_rtp_klv_pay_class_init (GstRtpKlvPayClass * klass)
{
GstElementClass *element_class = (GstElementClass *) klass;
GstRTPBasePayloadClass *rtpbasepay_class;
GST_DEBUG_CATEGORY_INIT (klvpay_debug, "klvpay", 0, "RTP KLV Payloader");
gst_element_class_add_pad_template (element_class,
gst_static_pad_template_get (&src_template));
gst_element_class_add_pad_template (element_class,
gst_static_pad_template_get (&sink_template));
gst_element_class_set_static_metadata (element_class,
"RTP KLV Payloader", "Codec/Payloader/Network",
"Payloads KLV (SMPTE ST 336) metadata as RTP packets",
"Tim-Philipp Müller <tim@centricular.com>");
rtpbasepay_class = (GstRTPBasePayloadClass *) klass;
rtpbasepay_class->set_caps = gst_rtp_klv_pay_setcaps;
rtpbasepay_class->handle_buffer = gst_rtp_klv_pay_handle_buffer;
}
static void
gst_rtp_klv_pay_init (GstRtpKlvPay * klvpay)
{
/* nothing to do here yet */
}
static gboolean
gst_rtp_klv_pay_setcaps (GstRTPBasePayload * pay, GstCaps * caps)
{
/* FIXME: allow other clock rates */
gst_rtp_base_payload_set_options (pay, "application", TRUE, "SMPTE336M",
90000);
return gst_rtp_base_payload_set_outcaps (pay, NULL);
}
static GstFlowReturn
gst_rtp_klv_pay_handle_buffer (GstRTPBasePayload * basepayload, GstBuffer * buf)
{
GstFlowReturn ret = GST_FLOW_OK;
GstBufferList *list = NULL;
GstRtpKlvPay *pay;
GstMapInfo map;
GstBuffer *outbuf = NULL;
gsize offset;
guint mtu, rtp_header_size, max_payload_size;
pay = GST_RTP_KLV_PAY (basepayload);
mtu = GST_RTP_BASE_PAYLOAD_MTU (basepayload);
rtp_header_size = gst_rtp_buffer_calc_header_len (0);
max_payload_size = mtu - rtp_header_size;
gst_buffer_map (buf, &map, GST_MAP_READ);
if (map.size == 0)
goto done;
/* KLV coding shall use and only use a fixed 16-byte SMPTE-administered
* Universal Label, according to SMPTE 298M as Key (Rec. ITU R-BT.1653-1) */
if (map.size < 16 || GST_READ_UINT32_BE (map.data) != 0x060E2B34)
goto bad_input;
if (map.size > max_payload_size)
list = gst_buffer_list_new ();
GST_LOG_OBJECT (pay, "%" G_GSIZE_FORMAT " bytes of data to payload",
map.size);
offset = 0;
while (offset < map.size) {
GstBuffer *payloadbuf;
GstRTPBuffer rtp = { NULL };
guint payload_size;
guint bytes_left;
bytes_left = map.size - offset;
payload_size = MIN (bytes_left, max_payload_size);
outbuf = gst_rtp_buffer_new_allocate (0, 0, 0);
if (payload_size == bytes_left) {
GST_LOG_OBJECT (pay, "last packet of KLV unit");
gst_rtp_buffer_map (outbuf, GST_MAP_WRITE, &rtp);
gst_rtp_buffer_set_marker (&rtp, 1);
gst_rtp_buffer_unmap (&rtp);
}
GST_LOG_OBJECT (pay, "packet with payload size %u", payload_size);
payloadbuf = gst_buffer_copy_region (buf, GST_BUFFER_COPY_MEMORY,
offset, payload_size);
/* join rtp header + payload memory parts */
outbuf = gst_buffer_append (outbuf, payloadbuf);
GST_BUFFER_PTS (outbuf) = GST_BUFFER_PTS (buf);
GST_BUFFER_DTS (outbuf) = GST_BUFFER_DTS (buf);
/* and add to list */
if (list != NULL)
gst_buffer_list_insert (list, -1, outbuf);
offset += payload_size;
}
done:
gst_buffer_unmap (buf, &map);
gst_buffer_unref (buf);
if (list != NULL)
ret = gst_rtp_base_payload_push_list (basepayload, list);
else if (outbuf != NULL)
ret = gst_rtp_base_payload_push (basepayload, outbuf);
return ret;
/* ERRORS */
bad_input:
{
GST_ERROR_OBJECT (pay, "Input doesn't look like a KLV packet, ignoring");
goto done;
}
}
gboolean
gst_rtp_klv_pay_plugin_init (GstPlugin * plugin)
{
return gst_element_register (plugin, "rtpklvpay",
GST_RANK_SECONDARY, GST_TYPE_RTP_KLV_PAY);
}
/* GStreamer RTP KLV Payloader
* Copyright (C) 2014-2015 Tim-Philipp Müller <tim@centricular.com>>
* Copyright (C) 2014-2015 Centricular Ltd
*
* 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 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., 51 Franklin St, Fifth Floor,
* Boston, MA 02110-1301, USA.
*/
#ifndef __GST_RTP_KLV_PAY_H__
#define __GST_RTP_KLV_PAY_H__
#include <gst/gst.h>
#include <gst/base/gstadapter.h>
#include <gst/rtp/rtp.h>
G_BEGIN_DECLS
#define GST_TYPE_RTP_KLV_PAY \
(gst_rtp_klv_pay_get_type())
#define GST_RTP_KLV_PAY(obj) \
(G_TYPE_CHECK_INSTANCE_CAST((obj),GST_TYPE_RTP_KLV_PAY,GstRtpKlvPay))
#define GST_RTP_KLV_PAY_CLASS(klass) \
(G_TYPE_CHECK_CLASS_CAST((klass),GST_TYPE_RTP_KLV_PAY,GstRtpKlvPayClass))
#define GST_IS_RTP_KLV_PAY(obj) \
(G_TYPE_CHECK_INSTANCE_TYPE((obj),GST_TYPE_RTP_KLV_PAY))
#define GST_IS_RTP_KLV_PAY_CLASS(klass) \
(G_TYPE_CHECK_CLASS_TYPE((klass),GST_TYPE_RTP_KLV_PAY))
typedef struct _GstRtpKlvPay GstRtpKlvPay;
typedef struct _GstRtpKlvPayClass GstRtpKlvPayClass;
struct _GstRtpKlvPay
{
GstRTPBasePayload rtpbasepayload;
};
struct _GstRtpKlvPayClass
{
GstRTPBasePayloadClass rtpbasepayload_class;
};
G_GNUC_INTERNAL GType gst_rtp_klv_pay_get_type (void);
G_GNUC_INTERNAL gboolean gst_rtp_klv_pay_plugin_init (GstPlugin * plugin);
G_END_DECLS
#endif /* __GST_RTP_KLV_PAY_H__ */
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