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https://gitlab.freedesktop.org/gstreamer/gstreamer.git
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257 lines
8.5 KiB
C
257 lines
8.5 KiB
C
/*
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* GStreamer AVTP Plugin
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* Copyright (C) 2019 Intel Corporation
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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 Lesser General Public
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* License as published by the Free Software Foundation; either
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* version 2.1 of the License, or (at your option) any later
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* 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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* Lesser General Public License for more details.
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*
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* You should have received a copy of the GNU Lesser 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 Street, Fifth Floor,
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* Boston, MA 02110-1301 USA
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*/
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#include "gstavtpbasepayload.h"
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GST_DEBUG_CATEGORY_STATIC (avtpbasepayload_debug);
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#define GST_CAT_DEFAULT (avtpbasepayload_debug)
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#define DEFAULT_STREAMID 0xAABBCCDDEEFF0000
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#define DEFAULT_MTT 50000000
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#define DEFAULT_TU 1000000
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#define DEFAULT_PROCESSING_DEADLINE (20 * GST_MSECOND)
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enum
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{
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PROP_0,
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PROP_STREAMID,
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PROP_MTT,
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PROP_TU,
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PROP_PROCESSING_DEADLINE,
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};
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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-avtp")
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);
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static void gst_avtp_base_payload_class_init (GstAvtpBasePayloadClass * klass);
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static void gst_avtp_base_payload_init (GstAvtpBasePayload * avtpbasepayload,
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gpointer g_class);
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static void gst_avtp_base_payload_set_property (GObject * object, guint prop_id,
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const GValue * value, GParamSpec * pspec);
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static void gst_avtp_base_payload_get_property (GObject * object, guint prop_id,
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GValue * value, GParamSpec * pspec);
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static gboolean gst_avtp_base_payload_sink_event (GstPad * pad,
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GstObject * parent, GstEvent * event);
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GType
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gst_avtp_base_payload_get_type (void)
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{
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static GType avtpbasepayload_type = 0;
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if (g_once_init_enter ((gsize *) & avtpbasepayload_type)) {
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static const GTypeInfo avtpbasepayload_info = {
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sizeof (GstAvtpBasePayloadClass),
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NULL,
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NULL,
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(GClassInitFunc) gst_avtp_base_payload_class_init,
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NULL,
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NULL,
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sizeof (GstAvtpBasePayload),
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0,
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(GInstanceInitFunc) gst_avtp_base_payload_init,
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};
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GType _type;
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_type = g_type_register_static (GST_TYPE_ELEMENT, "GstAvtpBasePayload",
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&avtpbasepayload_info, G_TYPE_FLAG_ABSTRACT);
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g_once_init_leave ((gsize *) & avtpbasepayload_type, _type);
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}
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return avtpbasepayload_type;
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}
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static void
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gst_avtp_base_payload_class_init (GstAvtpBasePayloadClass * klass)
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{
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GObjectClass *object_class = G_OBJECT_CLASS (klass);
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object_class->set_property = gst_avtp_base_payload_set_property;
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object_class->get_property = gst_avtp_base_payload_get_property;
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g_object_class_install_property (object_class, PROP_STREAMID,
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g_param_spec_uint64 ("streamid", "Stream ID",
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"Stream ID associated with the AVTPDU", 0, G_MAXUINT64,
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DEFAULT_STREAMID, G_PARAM_READWRITE | G_PARAM_STATIC_STRINGS |
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GST_PARAM_MUTABLE_READY));
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g_object_class_install_property (object_class, PROP_MTT,
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g_param_spec_uint ("mtt", "Maximum Transit Time",
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"Maximum Transit Time (MTT) in nanoseconds", 0,
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G_MAXUINT, DEFAULT_MTT, G_PARAM_READWRITE | G_PARAM_STATIC_STRINGS));
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g_object_class_install_property (object_class, PROP_TU,
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g_param_spec_uint ("tu", "Timing Uncertainty",
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"Timing Uncertainty (TU) in nanoseconds", 0,
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G_MAXUINT, DEFAULT_TU, G_PARAM_READWRITE | G_PARAM_STATIC_STRINGS));
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g_object_class_install_property (object_class, PROP_PROCESSING_DEADLINE,
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g_param_spec_uint64 ("processing-deadline", "Processing deadline",
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"Maximum amount of time (in ns) the pipeline can take for processing the buffer",
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0, G_MAXUINT64, DEFAULT_PROCESSING_DEADLINE, G_PARAM_READWRITE |
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G_PARAM_STATIC_STRINGS));
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klass->chain = NULL;
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klass->sink_event = GST_DEBUG_FUNCPTR (gst_avtp_base_payload_sink_event);
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GST_DEBUG_CATEGORY_INIT (avtpbasepayload_debug, "avtpbasepayload", 0,
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"Base class for AVTP payloaders");
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gst_type_mark_as_plugin_api (GST_TYPE_AVTP_BASE_PAYLOAD, 0);
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}
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static void
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gst_avtp_base_payload_init (GstAvtpBasePayload * avtpbasepayload,
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gpointer g_class)
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{
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GstPadTemplate *templ;
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GstElement *element = GST_ELEMENT (avtpbasepayload);
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GstElementClass *element_class = GST_ELEMENT_CLASS (g_class);
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GstAvtpBasePayloadClass *avtpbasepayload_class =
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GST_AVTP_BASE_PAYLOAD_CLASS (g_class);
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g_assert (avtpbasepayload_class->chain != NULL);
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avtpbasepayload->srcpad = gst_pad_new_from_static_template (&src_template,
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"src");
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gst_element_add_pad (element, avtpbasepayload->srcpad);
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templ = gst_element_class_get_pad_template (element_class, "sink");
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g_assert (templ != NULL);
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avtpbasepayload->sinkpad = gst_pad_new_from_template (templ, "sink");
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gst_pad_set_chain_function (avtpbasepayload->sinkpad,
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avtpbasepayload_class->chain);
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gst_pad_set_event_function (avtpbasepayload->sinkpad,
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avtpbasepayload_class->sink_event);
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gst_element_add_pad (element, avtpbasepayload->sinkpad);
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avtpbasepayload->streamid = DEFAULT_STREAMID;
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avtpbasepayload->mtt = DEFAULT_MTT;
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avtpbasepayload->tu = DEFAULT_TU;
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avtpbasepayload->processing_deadline = DEFAULT_PROCESSING_DEADLINE;
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avtpbasepayload->latency = GST_CLOCK_TIME_NONE;
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avtpbasepayload->seqnum = 0;
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gst_segment_init (&avtpbasepayload->segment, GST_FORMAT_UNDEFINED);
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}
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static void
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gst_avtp_base_payload_set_property (GObject * object, guint prop_id,
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const GValue * value, GParamSpec * pspec)
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{
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GstAvtpBasePayload *avtpbasepayload = GST_AVTP_BASE_PAYLOAD (object);
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GST_DEBUG_OBJECT (avtpbasepayload, "prop_id %u", prop_id);
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switch (prop_id) {
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case PROP_STREAMID:
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avtpbasepayload->streamid = g_value_get_uint64 (value);
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break;
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case PROP_MTT:
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avtpbasepayload->mtt = g_value_get_uint (value);
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break;
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case PROP_TU:
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avtpbasepayload->tu = g_value_get_uint (value);
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break;
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case PROP_PROCESSING_DEADLINE:
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avtpbasepayload->processing_deadline = g_value_get_uint64 (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_avtp_base_payload_get_property (GObject * object, guint prop_id,
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GValue * value, GParamSpec * pspec)
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{
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GstAvtpBasePayload *avtpbasepayload = GST_AVTP_BASE_PAYLOAD (object);
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GST_DEBUG_OBJECT (avtpbasepayload, "prop_id %u", prop_id);
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switch (prop_id) {
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case PROP_STREAMID:
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g_value_set_uint64 (value, avtpbasepayload->streamid);
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break;
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case PROP_MTT:
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g_value_set_uint (value, avtpbasepayload->mtt);
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break;
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case PROP_TU:
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g_value_set_uint (value, avtpbasepayload->tu);
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break;
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case PROP_PROCESSING_DEADLINE:
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g_value_set_uint64 (value, avtpbasepayload->processing_deadline);
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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 gboolean
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gst_avtp_base_payload_sink_event (GstPad * pad, GstObject * parent,
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GstEvent * event)
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{
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GstAvtpBasePayload *avtpbasepayload = GST_AVTP_BASE_PAYLOAD (parent);
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GST_DEBUG_OBJECT (avtpbasepayload, "event %s", GST_EVENT_TYPE_NAME (event));
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switch (GST_EVENT_TYPE (event)) {
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case GST_EVENT_SEGMENT:
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gst_event_copy_segment (event, &avtpbasepayload->segment);
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/* Fall through */
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default:
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return gst_pad_event_default (pad, parent, event);
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}
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}
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GstClockTime
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gst_avtp_base_payload_calc_ptime (GstAvtpBasePayload * avtpbasepayload,
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GstBuffer * buffer)
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{
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GstClockTime base_time, running_time;
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g_assert (GST_BUFFER_PTS (buffer) != GST_CLOCK_TIME_NONE);
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if (G_UNLIKELY (avtpbasepayload->latency == GST_CLOCK_TIME_NONE)) {
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GstQuery *query;
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query = gst_query_new_latency ();
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if (!gst_pad_peer_query (avtpbasepayload->sinkpad, query))
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return GST_CLOCK_TIME_NONE;
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gst_query_parse_latency (query, NULL, &avtpbasepayload->latency, NULL);
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gst_query_unref (query);
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GST_DEBUG_OBJECT (avtpbasepayload, "latency %" GST_TIME_FORMAT,
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GST_TIME_ARGS (avtpbasepayload->latency));
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}
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base_time = gst_element_get_base_time (GST_ELEMENT (avtpbasepayload));
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running_time = gst_segment_to_running_time (&avtpbasepayload->segment,
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avtpbasepayload->segment.format, GST_BUFFER_PTS (buffer));
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return base_time + running_time + avtpbasepayload->latency +
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avtpbasepayload->processing_deadline + avtpbasepayload->mtt +
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avtpbasepayload->tu;
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}
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