mirror of
https://gitlab.freedesktop.org/gstreamer/gstreamer.git
synced 2024-11-23 02:01:12 +00:00
rtp: add SMPTE 336M KLV metadata payloader
http://tools.ietf.org/html/rfc6597
This commit is contained in:
Tim-Philipp Müller
parent
12930c2f8c
commit
7db7da1acb
4 changed files with 269 additions and 0 deletions
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@ -50,6 +50,7 @@ libgstrtp_la_SOURCES = \
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gstrtpj2kpay.c \
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gstrtpjpegdepay.c \
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gstrtpjpegpay.c \
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gstrtpklvpay.c \
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gstrtpL16depay.c \
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gstrtpL16pay.c \
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gstrtpL24depay.c \
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@ -153,6 +154,7 @@ noinst_HEADERS = \
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gstrtpj2kpay.h \
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gstrtpjpegdepay.h \
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gstrtpjpegpay.h \
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gstrtpklvpay.h \
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gstrtpmp1sdepay.h \
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gstrtpmp2tdepay.h \
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gstrtpmp2tpay.h \
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@ -68,6 +68,7 @@
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#include "gstrtpj2kpay.h"
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#include "gstrtpjpegdepay.h"
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#include "gstrtpjpegpay.h"
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#include "gstrtpklvpay.h"
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#include "gstrtpL16depay.h"
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#include "gstrtpL16pay.h"
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#include "gstrtpL24depay.h"
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@ -242,6 +243,9 @@ plugin_init (GstPlugin * plugin)
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if (!gst_rtp_jpeg_pay_plugin_init (plugin))
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return FALSE;
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if (!gst_rtp_klv_pay_plugin_init (plugin))
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return FALSE;
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if (!gst_rtp_L16_pay_plugin_init (plugin))
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return FALSE;
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203
gst/rtp/gstrtpklvpay.c
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203
gst/rtp/gstrtpklvpay.c
Normal file
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@ -0,0 +1,203 @@
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/* GStreamer RTP KLV Payloader
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* Copyright (C) 2014-2015 Tim-Philipp Müller <tim@centricular.com>>
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* Copyright (C) 2014-2015 Centricular Ltd
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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 details.
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*
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* You should have received a copy of the GNU Library General Public
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* License along with this library; if not, write to the
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* Free Software Foundation, Inc., 51 Franklin St, Fifth Floor,
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* Boston, MA 02110-1301, USA.
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*/
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/**
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* SECTION:element-rtpklvpay
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* @see_also: rtpklvdepay
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*
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* Payloads KLV metadata into RTP packets according to RFC 6597.
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* For detailed information see: http://tools.ietf.org/html/rfc6597
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*
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* <refsect2>
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* <title>Example pipeline</title>
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* |[
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* gst-launch-1.0 filesrc location=video-with-klv.ts ! tsdemux ! rtpklvpay ! udpsink
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* ]| This example pipeline will payload an RTP KLV stream extracted from an
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* MPEG-TS stream and send it via UDP to an RTP receiver.
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* </refsect2>
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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 "gstrtpklvpay.h"
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#include <string.h>
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GST_DEBUG_CATEGORY_STATIC (klvpay_debug);
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#define GST_CAT_DEFAULT (klvpay_debug)
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static GstStaticPadTemplate src_template = 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) application, clock-rate = (int) [1, MAX], "
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"encoding-name = (string) SMPTE336M")
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);
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static GstStaticPadTemplate sink_template = 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 ("meta/x-klv, parsed = (bool) true"));
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#define gst_rtp_klv_pay_parent_class parent_class
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G_DEFINE_TYPE (GstRtpKlvPay, gst_rtp_klv_pay, GST_TYPE_RTP_BASE_PAYLOAD);
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static gboolean gst_rtp_klv_pay_setcaps (GstRTPBasePayload * pay,
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GstCaps * caps);
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static GstFlowReturn gst_rtp_klv_pay_handle_buffer (GstRTPBasePayload * pay,
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GstBuffer * buf);
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static void
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gst_rtp_klv_pay_class_init (GstRtpKlvPayClass * klass)
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{
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GstElementClass *element_class = (GstElementClass *) klass;
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GstRTPBasePayloadClass *rtpbasepay_class;
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GST_DEBUG_CATEGORY_INIT (klvpay_debug, "klvpay", 0, "RTP KLV Payloader");
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gst_element_class_add_pad_template (element_class,
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gst_static_pad_template_get (&src_template));
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gst_element_class_add_pad_template (element_class,
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gst_static_pad_template_get (&sink_template));
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gst_element_class_set_static_metadata (element_class,
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"RTP KLV Payloader", "Codec/Payloader/Network",
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"Payloads KLV (SMPTE ST 336) metadata as RTP packets",
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"Tim-Philipp Müller <tim@centricular.com>");
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rtpbasepay_class = (GstRTPBasePayloadClass *) klass;
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rtpbasepay_class->set_caps = gst_rtp_klv_pay_setcaps;
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rtpbasepay_class->handle_buffer = gst_rtp_klv_pay_handle_buffer;
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}
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static void
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gst_rtp_klv_pay_init (GstRtpKlvPay * klvpay)
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{
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/* nothing to do here yet */
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}
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static gboolean
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gst_rtp_klv_pay_setcaps (GstRTPBasePayload * pay, GstCaps * caps)
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{
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/* FIXME: allow other clock rates */
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gst_rtp_base_payload_set_options (pay, "application", TRUE, "SMPTE336M",
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90000);
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return gst_rtp_base_payload_set_outcaps (pay, NULL);
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}
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static GstFlowReturn
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gst_rtp_klv_pay_handle_buffer (GstRTPBasePayload * basepayload, GstBuffer * buf)
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{
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GstFlowReturn ret = GST_FLOW_OK;
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GstBufferList *list = NULL;
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GstRtpKlvPay *pay;
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GstMapInfo map;
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GstBuffer *outbuf = NULL;
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gsize offset;
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guint mtu, rtp_header_size, max_payload_size;
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pay = GST_RTP_KLV_PAY (basepayload);
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mtu = GST_RTP_BASE_PAYLOAD_MTU (basepayload);
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rtp_header_size = gst_rtp_buffer_calc_header_len (0);
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max_payload_size = mtu - rtp_header_size;
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gst_buffer_map (buf, &map, GST_MAP_READ);
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if (map.size == 0)
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goto done;
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/* KLV coding shall use and only use a fixed 16-byte SMPTE-administered
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* Universal Label, according to SMPTE 298M as Key (Rec. ITU R-BT.1653-1) */
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if (map.size < 16 || GST_READ_UINT32_BE (map.data) != 0x060E2B34)
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goto bad_input;
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if (map.size > max_payload_size)
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list = gst_buffer_list_new ();
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GST_LOG_OBJECT (pay, "%" G_GSIZE_FORMAT " bytes of data to payload",
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map.size);
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offset = 0;
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while (offset < map.size) {
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GstBuffer *payloadbuf;
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GstRTPBuffer rtp = { NULL };
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guint payload_size;
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guint bytes_left;
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bytes_left = map.size - offset;
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payload_size = MIN (bytes_left, max_payload_size);
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outbuf = gst_rtp_buffer_new_allocate (0, 0, 0);
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if (payload_size == bytes_left) {
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GST_LOG_OBJECT (pay, "last packet of KLV unit");
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gst_rtp_buffer_map (outbuf, GST_MAP_WRITE, &rtp);
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gst_rtp_buffer_set_marker (&rtp, 1);
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gst_rtp_buffer_unmap (&rtp);
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}
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GST_LOG_OBJECT (pay, "packet with payload size %u", payload_size);
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payloadbuf = gst_buffer_copy_region (buf, GST_BUFFER_COPY_MEMORY,
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offset, payload_size);
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/* join rtp header + payload memory parts */
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outbuf = gst_buffer_append (outbuf, payloadbuf);
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GST_BUFFER_PTS (outbuf) = GST_BUFFER_PTS (buf);
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GST_BUFFER_DTS (outbuf) = GST_BUFFER_DTS (buf);
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/* and add to list */
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if (list != NULL)
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gst_buffer_list_insert (list, -1, outbuf);
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offset += payload_size;
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}
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done:
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gst_buffer_unmap (buf, &map);
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gst_buffer_unref (buf);
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if (list != NULL)
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ret = gst_rtp_base_payload_push_list (basepayload, list);
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else if (outbuf != NULL)
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ret = gst_rtp_base_payload_push (basepayload, outbuf);
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return ret;
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/* ERRORS */
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bad_input:
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{
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GST_ERROR_OBJECT (pay, "Input doesn't look like a KLV packet, ignoring");
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goto done;
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}
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}
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gboolean
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gst_rtp_klv_pay_plugin_init (GstPlugin * plugin)
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{
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return gst_element_register (plugin, "rtpklvpay",
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GST_RANK_SECONDARY, GST_TYPE_RTP_KLV_PAY);
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}
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60
gst/rtp/gstrtpklvpay.h
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60
gst/rtp/gstrtpklvpay.h
Normal file
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@ -0,0 +1,60 @@
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/* GStreamer RTP KLV Payloader
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* Copyright (C) 2014-2015 Tim-Philipp Müller <tim@centricular.com>>
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* Copyright (C) 2014-2015 Centricular Ltd
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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 details.
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*
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* You should have received a copy of the GNU Library General Public
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* License along with this library; if not, write to the
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* Free Software Foundation, Inc., 51 Franklin St, Fifth Floor,
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* Boston, MA 02110-1301, USA.
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*/
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#ifndef __GST_RTP_KLV_PAY_H__
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#define __GST_RTP_KLV_PAY_H__
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#include <gst/gst.h>
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#include <gst/base/gstadapter.h>
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#include <gst/rtp/rtp.h>
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G_BEGIN_DECLS
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#define GST_TYPE_RTP_KLV_PAY \
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(gst_rtp_klv_pay_get_type())
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#define GST_RTP_KLV_PAY(obj) \
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(G_TYPE_CHECK_INSTANCE_CAST((obj),GST_TYPE_RTP_KLV_PAY,GstRtpKlvPay))
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#define GST_RTP_KLV_PAY_CLASS(klass) \
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(G_TYPE_CHECK_CLASS_CAST((klass),GST_TYPE_RTP_KLV_PAY,GstRtpKlvPayClass))
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#define GST_IS_RTP_KLV_PAY(obj) \
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(G_TYPE_CHECK_INSTANCE_TYPE((obj),GST_TYPE_RTP_KLV_PAY))
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#define GST_IS_RTP_KLV_PAY_CLASS(klass) \
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(G_TYPE_CHECK_CLASS_TYPE((klass),GST_TYPE_RTP_KLV_PAY))
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typedef struct _GstRtpKlvPay GstRtpKlvPay;
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typedef struct _GstRtpKlvPayClass GstRtpKlvPayClass;
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struct _GstRtpKlvPay
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{
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GstRTPBasePayload rtpbasepayload;
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};
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struct _GstRtpKlvPayClass
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{
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GstRTPBasePayloadClass rtpbasepayload_class;
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};
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G_GNUC_INTERNAL GType gst_rtp_klv_pay_get_type (void);
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G_GNUC_INTERNAL gboolean gst_rtp_klv_pay_plugin_init (GstPlugin * plugin);
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G_END_DECLS
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#endif /* __GST_RTP_KLV_PAY_H__ */
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