curl: add libcurl-based sink element

Sink acts as a client and can connect to servers to
upload media.

https://bugzilla.gnome.org/show_bug.cgi?id=641496

ext/curl/Makefile.am

@@ -0,0 +1,15 @@
+plugin_LTLIBRARIES = libgstcurl.la
+
+libgstcurl_la_SOURCES = gstcurl.c gstcurlsink.c
+libgstcurl_la_CFLAGS = \
+	$(GST_BASE_CFLAGS) \
+	$(GST_CFLAGS) \
+	$(CURL_CFLAGS)
+libgstcurl_la_LIBADD = \
+	$(GST_BASE_LIBS) \
+	$(GST_LIBS) \
+	$(CURL_LIBS)
+libgstcurl_la_LDFLAGS = $(GST_PLUGIN_LDFLAGS)
+libgstcurl_la_LIBTOOLFLAGS = --tag=disable-static
+
+noinst_HEADERS = gstcurlsink.h

ext/curl/gstcurl.c

@@ -0,0 +1,40 @@
+/* GStreamer
+ * Copyright (C) 2011 Axis Communications <dev-gstreamer@axis.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., 59 Temple Place - Suite 330,
+ * Boston, MA 02111-1307, USA.
+ */
+#ifdef HAVE_CONFIG_H
+#include <config.h>
+#endif
+
+#include "gstcurlsink.h"
+
+static gboolean
+plugin_init (GstPlugin * plugin)
+{
+
+  if (!gst_element_register (plugin, "curlsink", GST_RANK_NONE,
+          GST_TYPE_CURL_SINK))
+    return FALSE;
+
+  return TRUE;
+}
+
+GST_PLUGIN_DEFINE (GST_VERSION_MAJOR,
+    GST_VERSION_MINOR,
+    "curl",
+    "libcurl-based elements",
+    plugin_init, VERSION, "LGPL", GST_PACKAGE_NAME, GST_PACKAGE_ORIGIN)

ext/curl/gstcurlsink.h

@@ -0,0 +1,106 @@
+/* GStreamer
+ * Copyright (C) 2011 Axis Communications <dev-gstreamer@axis.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., 59 Temple Place - Suite 330,
+ * Boston, MA 02111-1307, USA.
+ */
+
+#ifndef __GST_CURL_SINK__
+#define __GST_CURL_SINK__
+
+#include <gst/gst.h>
+#include <gst/base/gstbasesink.h>
+#include <curl/curl.h>
+
+G_BEGIN_DECLS
+
+#define GST_TYPE_CURL_SINK \
+  (gst_curl_sink_get_type())
+#define GST_CURL_SINK(obj) \
+  (G_TYPE_CHECK_INSTANCE_CAST((obj), GST_TYPE_CURL_SINK, GstCurlSink))
+#define GST_CURL_SINK_CLASS(klass) \
+  (G_TYPE_CHECK_CLASS_CAST((klass), GST_TYPE_CURL_SINK, GstCurlSinkClass))
+#define GST_IS_CURL_SINK(obj) \
+  (G_TYPE_CHECK_INSTANCE_TYPE((obj), GST_TYPE_CURL_SINK))
+#define GST_IS_CURL_SINK_CLASS(klass) \
+  (G_TYPE_CHECK_CLASS_TYPE((klass), GST_TYPE_CURL_SINK))
+
+typedef struct _GstCurlSink GstCurlSink;
+typedef struct _GstCurlSinkClass GstCurlSinkClass;
+typedef struct _GstCurlSinkPrivate GstCurlSinkPrivate;
+
+typedef struct _TransferBuffer TransferBuffer;
+typedef struct _TransferCondition TransferCondition;
+
+struct _TransferBuffer {
+  guint8 *ptr;
+  size_t len;
+  size_t offset;
+};
+
+struct _TransferCondition {
+  GCond *cond;
+  gboolean data_sent;
+  gboolean data_available;
+};
+
+struct _GstCurlSinkPrivate
+{
+  CURLM *multi_handle;
+  CURL *curl;
+  struct curl_slist *header_list;
+  GstPollFD fd;
+  GstPoll *fdset;
+  GThread *transfer_thread;
+  GstFlowReturn flow_ret;
+  TransferBuffer *transfer_buf;
+  TransferCondition *transfer_cond;
+  gint num_buffers_per_packet;
+  gint timeout;
+  gchar *url;
+  gchar *user;
+  gchar *passwd;
+  gchar *proxy;
+  guint proxy_port;
+  gchar *proxy_user;
+  gchar *proxy_passwd;
+  gchar *file_name;
+  guint qos_dscp;
+  gboolean accept_self_signed;
+  gboolean use_content_length;
+  gboolean transfer_thread_close;
+  gboolean new_file;
+  gchar *content_type;
+  gboolean proxy_headers_set;
+};
+
+struct _GstCurlSink
+{
+  GstBaseSink parent;
+
+  /*< private >*/
+  GstCurlSinkPrivate *priv;
+};
+
+struct _GstCurlSinkClass
+{
+  GstBaseSinkClass parent_class;
+};
+
+GType gst_curl_sink_get_type (void);
+
+G_END_DECLS
+
+#endif