Initial commit

src/modules/v4l2/pv-v4l2-source.c

@@ -0,0 +1,130 @@
+/* Pulsevideo
+ * Copyright (C) 2015 Wim Taymans <wim.taymans@gmail.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.
+ */
+
+#include <gst/gst.h>
+#include <gio/gio.h>
+
+#include "pv-v4l2-source.h"
+
+#define PV_V4L2_SOURCE_GET_PRIVATE(obj)  \
+     (G_TYPE_INSTANCE_GET_PRIVATE ((obj), PV_TYPE_V4L2_SOURCE, PvV4l2SourcePrivate))
+
+struct _PvV4l2SourcePrivate
+{
+  GstElement *pipeline;
+  GstElement *sink;
+
+  GSocket *socket;
+};
+
+G_DEFINE_TYPE (PvV4l2Source, pv_v4l2_source, PV_TYPE_SOURCE);
+
+static void
+setup_pipeline (PvV4l2Source *source)
+{
+  PvV4l2SourcePrivate *priv = source->priv;
+
+  priv->pipeline = gst_parse_launch ("v4l2src ! video/x-raw,width=320,height=240,framerate=30/1 ! "
+                 "pvfdpay ! multisocketsink buffers-max=2 buffers-soft-max=1 "
+                 "recover-policy=latest sync-method=latest name=sink sync=true "
+                 "enable-last-sample=false", NULL);
+  priv->sink = gst_bin_get_by_name (GST_BIN (priv->pipeline), "sink");
+
+  gst_element_set_state (priv->pipeline, GST_STATE_READY);
+}
+
+static void
+on_socket_notify (GObject    *gobject,
+                  GParamSpec *pspec,
+                  gpointer    user_data)
+{
+  PvV4l2Source *source = user_data;
+  PvV4l2SourcePrivate *priv = source->priv;
+  GSocket *socket;
+  guint num_handles;
+
+  g_object_get (gobject, "socket", &socket, NULL);
+
+  if (socket == NULL) {
+    if (priv->socket)
+      g_signal_emit_by_name (priv->sink, "remove", priv->socket);
+  } else {
+    g_signal_emit_by_name (priv->sink, "add", socket);
+  }
+  priv->socket = socket;
+
+  g_object_get (priv->sink, "num-handles", &num_handles, NULL);
+  if (num_handles == 0) {
+    gst_element_set_state (priv->pipeline, GST_STATE_READY);
+  } else {
+    gst_element_set_state (priv->pipeline, GST_STATE_PLAYING);
+  }
+}
+
+static PvSourceOutput *
+v4l2_create_source_output (PvSource *source, GVariant *props, const gchar *prefix)
+{
+  PvSourceOutput *output;
+
+  output = PV_SOURCE_CLASS (pv_v4l2_source_parent_class)->create_source_output (source, props, prefix);
+
+  g_signal_connect (output, "notify::socket", (GCallback) on_socket_notify, source);
+
+  return output;
+}
+
+static gboolean
+v4l2_release_source_output  (PvSource *source, PvSourceOutput *output)
+{
+  return PV_SOURCE_CLASS (pv_v4l2_source_parent_class)->release_source_output (source, output);
+}
+
+static void
+v4l2_source_finalize (GObject * object)
+{
+  G_OBJECT_CLASS (pv_v4l2_source_parent_class)->finalize (object);
+}
+
+static void
+pv_v4l2_source_class_init (PvV4l2SourceClass * klass)
+{
+  GObjectClass *gobject_class = G_OBJECT_CLASS (klass);
+  PvSourceClass *source_class = PV_SOURCE_CLASS (klass);
+
+  g_type_class_add_private (klass, sizeof (PvV4l2SourcePrivate));
+
+  gobject_class->finalize = v4l2_source_finalize;
+
+  source_class->create_source_output = v4l2_create_source_output;
+  source_class->release_source_output = v4l2_release_source_output;
+}
+
+static void
+pv_v4l2_source_init (PvV4l2Source * source)
+{
+  source->priv = PV_V4L2_SOURCE_GET_PRIVATE (source);
+
+  setup_pipeline (source);
+}
+
+PvSource *
+pv_v4l2_source_new (PvDaemon *daemon)
+{
+  return g_object_new (PV_TYPE_V4L2_SOURCE, "daemon", daemon, NULL);
+}