camerabin2: Adds video recording bin

Adds an bin that is responsible for encoding and saving video
streams to files.

For now it is simply a ffmpegcolorspace ! theoraenc ! oggmux !
 filesink bin.

Still uncapable of recording audio.

gst/camerabin2/Makefile.am

@@ -2,6 +2,7 @@ plugin_LTLIBRARIES = libgstcamerabin2.la
 
 libgstcamerabin2_la_SOURCES = gstviewfinderbin.c \
 				gstimagecapturebin.c \
+				gstvideorecordingbin.c \
 				camerabingeneral.c \
 				gstbasecamerasrc.c \
 				gstcamerabin-enum.c \
@@ -23,6 +24,7 @@ libgstcamerabin2_la_LIBTOOLFLAGS = --tag=disable-static
 
 noinst_HEADERS = gstviewfinderbin.h \
 		gstimagecapturebin.h \
+		gstvideorecordingbin.h \
 		camerabingeneral.h \
 		gstbasecamerasrc.h \
 		gstv4l2camerasrc.h \

gst/camerabin2/gstplugin.c

@@ -25,6 +25,7 @@
 
 #include "gstviewfinderbin.h"
 #include "gstimagecapturebin.h"
+#include "gstvideorecordingbin.h"
 #include "gstv4l2camerasrc.h"
 
 static gboolean
@@ -34,6 +35,8 @@ plugin_init (GstPlugin * plugin)
     return FALSE;
   if (!gst_image_capture_bin_plugin_init (plugin))
     return FALSE;
+  if (!gst_video_recording_bin_plugin_init (plugin))
+    return FALSE;
   if (!gst_v4l2_camera_src_plugin_init (plugin))
     return FALSE;
 

gst/camerabin2/gstvideorecordingbin.c

@@ -0,0 +1,184 @@
+/* GStreamer
+ * Copyright (C) 2010 Thiago Santos <thiago.sousa.santos@collabora.co.uk>
+ *
+ * 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.
+ */
+/**
+ * SECTION:element-gstvideorecordingbin
+ *
+ * The gstvideorecordingbin element does FIXME stuff.
+ *
+ * <refsect2>
+ * <title>Example launch line</title>
+ * |[
+ * gst-launch -v videotestsrc num-buffers=3 ! videorecordingbin
+ * ]|
+ * FIXME Describe what the pipeline does.
+ * </refsect2>
+ */
+
+#ifdef HAVE_CONFIG_H
+#include "config.h"
+#endif
+
+#include "gstvideorecordingbin.h"
+
+/* prototypes */
+
+
+enum
+{
+  PROP_0
+};
+
+/* pad templates */
+
+static GstStaticPadTemplate sink_template = GST_STATIC_PAD_TEMPLATE ("sink",
+    GST_PAD_SINK,
+    GST_PAD_ALWAYS,
+    GST_STATIC_CAPS ("video/x-raw-yuv; video/x-raw-rgb")
+    );
+
+/* class initialization */
+
+GST_BOILERPLATE (GstVideoRecordingBin, gst_video_recording_bin, GstBin,
+    GST_TYPE_BIN);
+
+/* Element class functions */
+static GstStateChangeReturn
+gst_video_recording_bin_change_state (GstElement * element,
+    GstStateChange trans);
+
+static void
+gst_video_recording_bin_base_init (gpointer g_class)
+{
+  GstElementClass *element_class = GST_ELEMENT_CLASS (g_class);
+
+  gst_element_class_add_pad_template (element_class,
+      gst_static_pad_template_get (&sink_template));
+
+  gst_element_class_set_details_simple (element_class, "Video Recording Bin",
+      "Sink/Video", "Video Recording Bin used in camerabin2",
+      "Thiago Santos <thiago.sousa.santos@collabora.co.uk>");
+}
+
+static void
+gst_video_recording_bin_class_init (GstVideoRecordingBinClass * klass)
+{
+  GstElementClass *element_class;
+
+  element_class = GST_ELEMENT_CLASS (klass);
+
+  element_class->change_state =
+      GST_DEBUG_FUNCPTR (gst_video_recording_bin_change_state);
+}
+
+static void
+gst_video_recording_bin_init (GstVideoRecordingBin * video_recordingbin,
+    GstVideoRecordingBinClass * video_recordingbin_class)
+{
+  video_recordingbin->ghostpad =
+      gst_ghost_pad_new_no_target_from_template ("sink",
+      gst_static_pad_template_get (&sink_template));
+  gst_element_add_pad (GST_ELEMENT_CAST (video_recordingbin),
+      video_recordingbin->ghostpad);
+}
+
+static gboolean
+gst_video_recording_bin_create_elements (GstVideoRecordingBin * vrbin)
+{
+  GstElement *csp;
+  GstElement *enc;
+  GstElement *mux;
+  GstElement *sink;
+  GstPad *pad = NULL;
+
+  if (vrbin->elements_created)
+    return TRUE;
+
+  /* create elements */
+  csp = gst_element_factory_make ("ffmpegcolorspace", "vrbin-csp");
+  if (!csp)
+    goto error;
+
+  enc = gst_element_factory_make ("theoraenc", "vrbin-enc");
+  if (!enc)
+    goto error;
+
+  mux = gst_element_factory_make ("oggmux", "vrbin-mux");
+  if (!mux)
+    goto error;
+
+  sink = gst_element_factory_make ("filesink", "vrbin-sink");
+  if (!sink)
+    goto error;
+
+  g_object_set (sink, "location", "cap.ogg", NULL);
+
+  /* add and link */
+  gst_bin_add_many (GST_BIN_CAST (vrbin), csp, enc, mux, sink, NULL);
+  if (!gst_element_link_many (csp, enc, mux, sink, NULL))
+    goto error;
+
+  /* add ghostpad */
+  pad = gst_element_get_static_pad (csp, "sink");
+  if (!gst_ghost_pad_set_target (GST_GHOST_PAD (vrbin->ghostpad), pad))
+    goto error;
+
+  vrbin->elements_created = TRUE;
+  return TRUE;
+
+error:
+  if (pad)
+    gst_object_unref (pad);
+  return FALSE;
+}
+
+static GstStateChangeReturn
+gst_video_recording_bin_change_state (GstElement * element,
+    GstStateChange trans)
+{
+  GstStateChangeReturn ret = GST_STATE_CHANGE_SUCCESS;
+  GstVideoRecordingBin *vrbin = GST_VIDEO_RECORDING_BIN_CAST (element);
+
+  switch (trans) {
+    case GST_STATE_CHANGE_NULL_TO_READY:
+      if (!gst_video_recording_bin_create_elements (vrbin)) {
+        return GST_STATE_CHANGE_FAILURE;
+      }
+      break;
+    default:
+      break;
+  }
+
+  ret = GST_ELEMENT_CLASS (parent_class)->change_state (element, trans);
+
+  switch (trans) {
+    case GST_STATE_CHANGE_READY_TO_NULL:
+      break;
+    default:
+      break;
+  }
+
+  return ret;
+}
+
+gboolean
+gst_video_recording_bin_plugin_init (GstPlugin * plugin)
+{
+  return gst_element_register (plugin, "videorecordingbin", GST_RANK_NONE,
+      gst_video_recording_bin_get_type ());
+}

gst/camerabin2/gstvideorecordingbin.h

@@ -0,0 +1,55 @@
+/* GStreamer
+ * Copyright (C) 2010 Thiago Santos <thiago.sousa.santos@collabora.co.uk>
+ *
+ * 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_VIDEO_RECORDING_BIN_H_
+#define _GST_VIDEO_RECORDING_BIN_H_
+
+#include <gst/gst.h>
+
+G_BEGIN_DECLS
+
+#define GST_TYPE_VIDEO_RECORDING_BIN   (gst_video_recording_bin_get_type())
+#define GST_VIDEO_RECORDING_BIN(obj)   (G_TYPE_CHECK_INSTANCE_CAST((obj),GST_TYPE_VIDEO_RECORDING_BIN,GstVideoRecordingBin))
+#define GST_VIDEO_RECORDING_BIN_CAST(obj)   ((GstVideoRecordingBin *) obj)
+#define GST_VIDEO_RECORDING_BIN_CLASS(klass)   (G_TYPE_CHECK_CLASS_CAST((klass),GST_TYPE_VIDEO_RECORDING_BIN,GstVideoRecordingBinClass))
+#define GST_IS_VIDEO_RECORDING_BIN(obj)   (G_TYPE_CHECK_INSTANCE_TYPE((obj),GST_TYPE_VIDEO_RECORDING_BIN))
+#define GST_IS_VIDEO_RECORDING_BIN_CLASS(obj)   (G_TYPE_CHECK_CLASS_TYPE((klass),GST_TYPE_VIDEO_RECORDING_BIN))
+
+typedef struct _GstVideoRecordingBin GstVideoRecordingBin;
+typedef struct _GstVideoRecordingBinClass GstVideoRecordingBinClass;
+
+struct _GstVideoRecordingBin
+{
+  GstBin bin;
+
+  GstPad *ghostpad;
+
+  gboolean elements_created;
+};
+
+struct _GstVideoRecordingBinClass
+{
+  GstBinClass bin_class;
+};
+
+GType gst_video_recording_bin_get_type (void);
+gboolean gst_video_recording_bin_plugin_init (GstPlugin * plugin);
+
+G_END_DECLS
+
+#endif