gstreamer/ext/srt/gstsrtsink.c
2020-10-09 07:47:47 +00:00

378 lines
11 KiB
C

/* GStreamer
* Copyright (C) 2018, Collabora Ltd.
* Copyright (C) 2018, SK Telecom, Co., Ltd.
* Author: Jeongseok Kim <jeongseok.kim@sk.com>
*
* 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-srtsink
* @title: srtsink
*
* srtsink is a network sink that sends [SRT](http://www.srtalliance.org/)
* packets to the network.
*
* ## Examples</title>
*
* |[
* gst-launch-1.0 -v audiotestsrc ! srtsink uri=srt://host
* ]| This pipeline shows how to serve SRT packets through the default port.
*
* |[
* gst-launch-1.0 -v audiotestsrc ! srtsink uri=srt://:port
* ]| This pipeline shows how to wait SRT callers.
*
*/
#ifdef HAVE_CONFIG_H
#include <config.h>
#endif
#include "gstsrtsink.h"
static GstStaticPadTemplate sink_template = GST_STATIC_PAD_TEMPLATE ("sink",
GST_PAD_SINK,
GST_PAD_ALWAYS,
GST_STATIC_CAPS_ANY);
#define GST_CAT_DEFAULT gst_debug_srt_sink
GST_DEBUG_CATEGORY (GST_CAT_DEFAULT);
enum
{
SIG_CALLER_ADDED,
SIG_CALLER_REMOVED,
LAST_SIGNAL
};
static guint signals[LAST_SIGNAL] = { 0 };
static void gst_srt_sink_uri_handler_init (gpointer g_iface,
gpointer iface_data);
static gchar *gst_srt_sink_uri_get_uri (GstURIHandler * handler);
static gboolean gst_srt_sink_uri_set_uri (GstURIHandler * handler,
const gchar * uri, GError ** error);
#define gst_srt_sink_parent_class parent_class
G_DEFINE_TYPE_WITH_CODE (GstSRTSink, gst_srt_sink,
GST_TYPE_BASE_SINK,
G_IMPLEMENT_INTERFACE (GST_TYPE_URI_HANDLER, gst_srt_sink_uri_handler_init)
GST_DEBUG_CATEGORY_INIT (GST_CAT_DEFAULT, "srtsink", 0, "SRT Sink"));
static void
gst_srt_sink_set_property (GObject * object,
guint prop_id, const GValue * value, GParamSpec * pspec)
{
GstSRTSink *self = GST_SRT_SINK (object);
if (!gst_srt_object_set_property_helper (self->srtobject, prop_id, value,
pspec)) {
G_OBJECT_WARN_INVALID_PROPERTY_ID (object, prop_id, pspec);
}
}
static void
gst_srt_sink_get_property (GObject * object,
guint prop_id, GValue * value, GParamSpec * pspec)
{
GstSRTSink *self = GST_SRT_SINK (object);
if (!gst_srt_object_get_property_helper (self->srtobject, prop_id, value,
pspec)) {
G_OBJECT_WARN_INVALID_PROPERTY_ID (object, prop_id, pspec);
}
}
static void
gst_srt_sink_finalize (GObject * object)
{
GstSRTSink *self = GST_SRT_SINK (object);
g_clear_object (&self->cancellable);
gst_srt_object_destroy (self->srtobject);
G_OBJECT_CLASS (parent_class)->finalize (object);
}
static void
gst_srt_sink_init (GstSRTSink * self)
{
self->srtobject = gst_srt_object_new (GST_ELEMENT (self));
self->cancellable = g_cancellable_new ();
gst_srt_object_set_uri (self->srtobject, GST_SRT_DEFAULT_URI, NULL);
}
static gboolean
gst_srt_sink_start (GstBaseSink * bsink)
{
GstSRTSink *self = GST_SRT_SINK (bsink);
GstSRTConnectionMode connection_mode = GST_SRT_CONNECTION_MODE_NONE;
GError *error = NULL;
gboolean ret = FALSE;
gst_structure_get_enum (self->srtobject->parameters, "mode",
GST_TYPE_SRT_CONNECTION_MODE, (gint *) & connection_mode);
ret = gst_srt_object_open (self->srtobject, self->cancellable, &error);
if (!ret) {
/* ensure error is posted since state change will fail */
GST_ELEMENT_ERROR (self, RESOURCE, OPEN_WRITE, (NULL),
("Failed to open SRT: %s", error->message));
g_clear_error (&error);
}
return ret;
}
static gboolean
gst_srt_sink_stop (GstBaseSink * bsink)
{
GstSRTSink *self = GST_SRT_SINK (bsink);
gst_srt_object_close (self->srtobject);
return TRUE;
}
static GstFlowReturn
gst_srt_sink_render (GstBaseSink * sink, GstBuffer * buffer)
{
GstSRTSink *self = GST_SRT_SINK (sink);
GstFlowReturn ret = GST_FLOW_OK;
GstMapInfo info;
GError *error = NULL;
if (g_cancellable_is_cancelled (self->cancellable)) {
ret = GST_FLOW_FLUSHING;
}
if (self->headers && GST_BUFFER_FLAG_IS_SET (buffer, GST_BUFFER_FLAG_HEADER)) {
GST_DEBUG_OBJECT (self, "Have streamheaders,"
" ignoring header %" GST_PTR_FORMAT, buffer);
return GST_FLOW_OK;
}
if (!gst_buffer_map (buffer, &info, GST_MAP_READ)) {
GST_ELEMENT_ERROR (self, RESOURCE, READ,
("Could not map the input stream"), (NULL));
return GST_FLOW_ERROR;
}
if (gst_srt_object_write (self->srtobject, self->headers, &info,
self->cancellable, &error) < 0) {
GST_ELEMENT_ERROR (self, RESOURCE, WRITE,
("Failed to write to SRT socket: %s",
error ? error->message : "Unknown error"), (NULL));
g_clear_error (&error);
ret = GST_FLOW_ERROR;
}
gst_buffer_unmap (buffer, &info);
GST_TRACE_OBJECT (self, "sending buffer %p, offset %"
G_GINT64_FORMAT ", offset_end %" G_GINT64_FORMAT
", timestamp %" GST_TIME_FORMAT ", duration %" GST_TIME_FORMAT
", size %" G_GSIZE_FORMAT,
buffer, GST_BUFFER_OFFSET (buffer),
GST_BUFFER_OFFSET_END (buffer),
GST_TIME_ARGS (GST_BUFFER_TIMESTAMP (buffer)),
GST_TIME_ARGS (GST_BUFFER_DURATION (buffer)),
gst_buffer_get_size (buffer));
return ret;
}
static gboolean
gst_srt_sink_unlock (GstBaseSink * bsink)
{
GstSRTSink *self = GST_SRT_SINK (bsink);
gst_srt_object_wakeup (self->srtobject, self->cancellable);
return TRUE;
}
static gboolean
gst_srt_sink_unlock_stop (GstBaseSink * bsink)
{
GstSRTSink *self = GST_SRT_SINK (bsink);
g_cancellable_reset (self->cancellable);
return TRUE;
}
static gboolean
gst_srt_sink_set_caps (GstBaseSink * bsink, GstCaps * caps)
{
GstSRTSink *self = GST_SRT_SINK (bsink);
GstStructure *s;
const GValue *streamheader;
GST_DEBUG_OBJECT (self, "setcaps %" GST_PTR_FORMAT, caps);
g_clear_pointer (&self->headers, gst_buffer_list_unref);
s = gst_caps_get_structure (caps, 0);
streamheader = gst_structure_get_value (s, "streamheader");
if (!streamheader) {
GST_DEBUG_OBJECT (self, "'streamheader' field not present");
} else if (GST_VALUE_HOLDS_BUFFER (streamheader)) {
GST_DEBUG_OBJECT (self, "'streamheader' field holds buffer");
self->headers = gst_buffer_list_new_sized (1);
gst_buffer_list_add (self->headers, g_value_dup_boxed (streamheader));
} else if (GST_VALUE_HOLDS_ARRAY (streamheader)) {
guint i, size;
GST_DEBUG_OBJECT (self, "'streamheader' field holds array");
size = gst_value_array_get_size (streamheader);
self->headers = gst_buffer_list_new_sized (size);
for (i = 0; i < size; i++) {
const GValue *v = gst_value_array_get_value (streamheader, i);
if (!GST_VALUE_HOLDS_BUFFER (v)) {
GST_ERROR_OBJECT (self, "'streamheader' item of unexpected type '%s'",
G_VALUE_TYPE_NAME (v));
return FALSE;
}
gst_buffer_list_add (self->headers, g_value_dup_boxed (v));
}
} else {
GST_ERROR_OBJECT (self, "'streamheader' field has unexpected type '%s'",
G_VALUE_TYPE_NAME (streamheader));
return FALSE;
}
GST_DEBUG_OBJECT (self, "Collected streamheaders: %u buffers",
self->headers ? gst_buffer_list_length (self->headers) : 0);
return TRUE;
}
static void
gst_srt_sink_class_init (GstSRTSinkClass * klass)
{
GObjectClass *gobject_class = G_OBJECT_CLASS (klass);
GstElementClass *gstelement_class = GST_ELEMENT_CLASS (klass);
GstBaseSinkClass *gstbasesink_class = GST_BASE_SINK_CLASS (klass);
gobject_class->set_property = gst_srt_sink_set_property;
gobject_class->get_property = gst_srt_sink_get_property;
gobject_class->finalize = gst_srt_sink_finalize;
/**
* GstSRTSink::caller-added:
* @gstsrtsink: the srtsink element that emitted this signal
* @sock: the client socket descriptor that was added to srtsink
* @addr: the #GSocketAddress that describes the @sock
*
* The given socket descriptor was added to srtsink.
*/
signals[SIG_CALLER_ADDED] =
g_signal_new ("caller-added", G_TYPE_FROM_CLASS (klass),
G_SIGNAL_RUN_LAST, G_STRUCT_OFFSET (GstSRTSinkClass, caller_added),
NULL, NULL, NULL, G_TYPE_NONE, 2, G_TYPE_INT, G_TYPE_SOCKET_ADDRESS);
/**
* GstSRTSink::caller-removed:
* @gstsrtsink: the srtsink element that emitted this signal
* @sock: the client socket descriptor that was added to srtsink
* @addr: the #GSocketAddress that describes the @sock
*
* The given socket descriptor was removed from srtsink.
*/
signals[SIG_CALLER_REMOVED] =
g_signal_new ("caller-removed", G_TYPE_FROM_CLASS (klass),
G_SIGNAL_RUN_LAST, G_STRUCT_OFFSET (GstSRTSinkClass,
caller_added), NULL, NULL, NULL, G_TYPE_NONE,
2, G_TYPE_INT, G_TYPE_SOCKET_ADDRESS);
gst_srt_object_install_properties_helper (gobject_class);
gst_element_class_add_static_pad_template (gstelement_class, &sink_template);
gst_element_class_set_metadata (gstelement_class,
"SRT sink", "Sink/Network",
"Send data over the network via SRT",
"Justin Kim <justin.joy.9to5@gmail.com>");
gstbasesink_class->start = GST_DEBUG_FUNCPTR (gst_srt_sink_start);
gstbasesink_class->stop = GST_DEBUG_FUNCPTR (gst_srt_sink_stop);
gstbasesink_class->render = GST_DEBUG_FUNCPTR (gst_srt_sink_render);
gstbasesink_class->unlock = GST_DEBUG_FUNCPTR (gst_srt_sink_unlock);
gstbasesink_class->unlock_stop = GST_DEBUG_FUNCPTR (gst_srt_sink_unlock_stop);
gstbasesink_class->set_caps = GST_DEBUG_FUNCPTR (gst_srt_sink_set_caps);
}
static GstURIType
gst_srt_sink_uri_get_type (GType type)
{
return GST_URI_SINK;
}
static const gchar *const *
gst_srt_sink_uri_get_protocols (GType type)
{
static const gchar *protocols[] = { GST_SRT_DEFAULT_URI_SCHEME, NULL };
return protocols;
}
static gchar *
gst_srt_sink_uri_get_uri (GstURIHandler * handler)
{
gchar *uri_str;
GstSRTSink *self = GST_SRT_SINK (handler);
GST_OBJECT_LOCK (self);
uri_str = gst_uri_to_string (self->srtobject->uri);
GST_OBJECT_UNLOCK (self);
return uri_str;
}
static gboolean
gst_srt_sink_uri_set_uri (GstURIHandler * handler,
const gchar * uri, GError ** error)
{
GstSRTSink *self = GST_SRT_SINK (handler);
gboolean ret;
GST_OBJECT_LOCK (self);
ret = gst_srt_object_set_uri (self->srtobject, uri, error);
GST_OBJECT_UNLOCK (self);
return ret;
}
static void
gst_srt_sink_uri_handler_init (gpointer g_iface, gpointer iface_data)
{
GstURIHandlerInterface *iface = (GstURIHandlerInterface *) g_iface;
iface->get_type = gst_srt_sink_uri_get_type;
iface->get_protocols = gst_srt_sink_uri_get_protocols;
iface->get_uri = gst_srt_sink_uri_get_uri;
iface->set_uri = gst_srt_sink_uri_set_uri;
}