Move farsight-using sources to src

And only build them for empathy-av, since they use farsight.

1 files changed, 360 insertions, 0 deletions

diff --git a/src/empathy-video-src.c b/src/empathy-video-src.c
new file mode 100644
index 000000000..5c865daaa
--- /dev/null
+++ b/src/empathy-video-src.c
@@ -0,0 +1,360 @@
+/*
+ * empathy-gst-video-src.c - Source for EmpathyGstVideoSrc
+ * Copyright (C) 2008 Collabora Ltd.
+ * @author Sjoerd Simons <sjoerd.simons@collabora.co.uk>
+ *
+ * This library is free software; you can redistribute it and/or
+ * modify it under the terms of the GNU Lesser General Public
+ * License as published by the Free Software Foundation; either
+ * version 2.1 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
+ * Lesser General Public License for more details.
+ *
+ * You should have received a copy of the GNU Lesser 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 <stdio.h>
+#include <stdlib.h>
+
+#include <gst/interfaces/colorbalance.h>
+
+#include "empathy-video-src.h"
+
+G_DEFINE_TYPE(EmpathyGstVideoSrc, empathy_video_src, GST_TYPE_BIN)
+
+/* Keep in sync with EmpathyGstVideoSrcChannel */
+static const gchar *channel_names[NR_EMPATHY_GST_VIDEO_SRC_CHANNELS] = {
+  "contrast", "brightness", "gamma" };
+
+/* signal enum */
+#if 0
+enum
+{
+    LAST_SIGNAL
+};
+
+static guint signals[LAST_SIGNAL] = {0};
+#endif
+
+/* private structure */
+typedef struct _EmpathyGstVideoSrcPrivate EmpathyGstVideoSrcPrivate;
+
+struct _EmpathyGstVideoSrcPrivate
+{
+  gboolean dispose_has_run;
+  GstElement *src;
+  /* Element implementing a ColorBalance interface */
+  GstElement *balance;
+};
+
+#define EMPATHY_GST_VIDEO_SRC_GET_PRIVATE(o) \
+  (G_TYPE_INSTANCE_GET_PRIVATE ((o), EMPATHY_TYPE_GST_VIDEO_SRC, \
+    EmpathyGstVideoSrcPrivate))
+/**
+ * empathy_gst_add_to_bin - create a new gst element, add to bin and link it.
+ * @bin - bin to add the new element to.
+ * @src - src element for the new element (may be NULL).
+ * @name - name of the factory for the new element
+ *
+ * Returns: The newly created element ot %NULL on failure
+ */
+static GstElement *
+empathy_gst_add_to_bin (GstBin *bin,
+  GstElement *src,
+  const gchar *factoryname)
+{
+  GstElement *ret;
+
+  if ((ret = gst_element_factory_make (factoryname, NULL)) == NULL)
+  {
+    g_message ("Element factory \"%s\" not found.", factoryname);
+    goto error;
+  }
+
+  if (!gst_bin_add (bin, ret))
+  {
+    g_warning ("Couldn't add \"%s\" to bin.", factoryname);
+    goto error;
+  }
+
+  /* do not link if src == NULL, just exit here */
+  if (src == NULL)
+    return ret;
+
+  if (!gst_element_link (src, ret))
+  {
+    g_warning ("Failed to link \"%s\".", factoryname);
+    gst_bin_remove (bin, ret);
+    goto error;
+  }
+
+  return ret;
+
+error:
+  if (ret != NULL)
+    gst_object_unref (ret);
+  return NULL;
+}
+
+
+static void
+empathy_video_src_init (EmpathyGstVideoSrc *obj)
+{
+  EmpathyGstVideoSrcPrivate *priv = EMPATHY_GST_VIDEO_SRC_GET_PRIVATE (obj);
+  GstElement *element, *element_back;
+  GstPad *ghost, *src;
+  GstCaps *caps;
+  gchar *str;
+
+  /* allocate caps here, so we can update it by optional elements */
+  caps = gst_caps_new_simple ("video/x-raw-yuv",
+    "width", G_TYPE_INT, 320,
+    "height", G_TYPE_INT, 240,
+    NULL);
+
+  /* allocate any data required by the object here */
+  if ((element = empathy_gst_add_to_bin (GST_BIN (obj),
+      NULL, "gconfvideosrc")) == NULL)
+    g_error ("Couldn't add \"gconfvideosrc\" (gst-plugins-good missing?)");
+
+  /* we need to save our source to priv->src */
+  priv->src = element;
+
+  /* videomaxrate is optional as it's part of gst-plugins-bad. So don't
+   * fail if it doesn't exist. */
+  element_back = element;
+  if ((element = empathy_gst_add_to_bin (GST_BIN (obj),
+      element, "videomaxrate")) == NULL)
+    {
+      g_message ("Couldn't add \"videomaxrate\" (gst-plugins-bad missing?)");
+      element = element_back;
+    }
+  else
+    {
+      gst_caps_set_simple (caps,
+        "framerate", GST_TYPE_FRACTION, 15, 1,
+        NULL);
+    }
+
+  str = gst_caps_to_string (caps);
+  g_debug ("Current video src caps are : %s", str);
+  g_free (str);
+
+  if ((element = empathy_gst_add_to_bin (GST_BIN (obj),
+      element, "ffmpegcolorspace")) == NULL)
+    g_error ("Failed to add \"ffmpegcolorspace\" (gst-plugins-base missing?)");
+
+  if ((element = empathy_gst_add_to_bin (GST_BIN (obj),
+      element, "videoscale")) == NULL)
+    g_error ("Failed to add \"videoscale\", (gst-plugins-base missing?)");
+
+  if ((element = empathy_gst_add_to_bin (GST_BIN (obj),
+      element, "capsfilter")) == NULL)
+    g_error (
+      "Failed to add \"capsfilter\" (gstreamer core elements missing?)");
+
+  g_object_set (G_OBJECT (element), "caps", caps, NULL);
+
+
+  /* optionally add postproc_tmpnoise to improve the performance of encoders */
+  element_back = element;
+  if ((element = empathy_gst_add_to_bin (GST_BIN (obj),
+      element, "postproc_tmpnoise")) == NULL)
+    {
+      g_message ("Failed to add \"postproc_tmpnoise\" (gst-ffmpeg missing?)");
+      element = element_back;
+    }
+
+  src = gst_element_get_static_pad (element, "src");
+  g_assert (src != NULL);
+
+  ghost = gst_ghost_pad_new ("src", src);
+  if (ghost == NULL)
+    g_error ("Unable to create ghost pad for the videosrc");
+
+  if (!gst_element_add_pad (GST_ELEMENT (obj), ghost))
+    g_error ("pad with the same name already existed or "
+            "the pad already had another parent.");
+
+  gst_object_unref (G_OBJECT (src));
+}
+
+static void empathy_video_src_dispose (GObject *object);
+static void empathy_video_src_finalize (GObject *object);
+
+static void
+empathy_video_src_class_init (EmpathyGstVideoSrcClass *empathy_video_src_class)
+{
+  GObjectClass *object_class = G_OBJECT_CLASS (empathy_video_src_class);
+
+  g_type_class_add_private (empathy_video_src_class,
+    sizeof (EmpathyGstVideoSrcPrivate));
+
+  object_class->dispose = empathy_video_src_dispose;
+  object_class->finalize = empathy_video_src_finalize;
+}
+
+void
+empathy_video_src_dispose (GObject *object)
+{
+  EmpathyGstVideoSrc *self = EMPATHY_GST_VIDEO_SRC (object);
+  EmpathyGstVideoSrcPrivate *priv = EMPATHY_GST_VIDEO_SRC_GET_PRIVATE (self);
+
+  if (priv->dispose_has_run)
+    return;
+
+  priv->dispose_has_run = TRUE;
+
+  /* release any references held by the object here */
+
+  if (G_OBJECT_CLASS (empathy_video_src_parent_class)->dispose)
+    G_OBJECT_CLASS (empathy_video_src_parent_class)->dispose (object);
+}
+
+void
+empathy_video_src_finalize (GObject *object)
+{
+  //EmpathyGstVideoSrc *self = EMPATHY_GST_VIDEO_SRC (object);
+  //EmpathyGstVideoSrcPrivate *priv = EMPATHY_GST_VIDEO_SRC_GET_PRIVATE (self);
+
+  /* free any data held directly by the object here */
+
+  G_OBJECT_CLASS (empathy_video_src_parent_class)->finalize (object);
+}
+
+GstElement *
+empathy_video_src_new (void)
+{
+  static gboolean registered = FALSE;
+
+  if (!registered) {
+    if (!gst_element_register (NULL, "empathyvideosrc",
+            GST_RANK_NONE, EMPATHY_TYPE_GST_VIDEO_SRC))
+      return NULL;
+    registered = TRUE;
+  }
+  return gst_element_factory_make ("empathyvideosrc", NULL);
+}
+
+void
+empathy_video_src_set_channel (GstElement *src,
+  EmpathyGstVideoSrcChannel channel, guint percent)
+{
+  GstElement *color;
+  GstColorBalance *balance;
+  const GList *channels;
+  GList *l;
+
+  /* Find something supporting GstColorBalance */
+  color = gst_bin_get_by_interface (GST_BIN (src), GST_TYPE_COLOR_BALANCE);
+
+  if (color == NULL)
+    return;
+
+  balance = GST_COLOR_BALANCE (color);
+
+  channels = gst_color_balance_list_channels (balance);
+
+  for (l = (GList *) channels; l != NULL; l = g_list_next (l))
+    {
+      GstColorBalanceChannel *c = GST_COLOR_BALANCE_CHANNEL (l->data);
+
+      if (g_ascii_strcasecmp (c->label, channel_names[channel]) == 0)
+        {
+          gst_color_balance_set_value (balance, c,
+            ((c->max_value - c->min_value) * percent)/100
+              + c->min_value);
+          break;
+        }
+    }
+
+  g_object_unref (color);
+}
+
+guint
+empathy_video_src_get_channel (GstElement *src,
+  EmpathyGstVideoSrcChannel channel)
+{
+  GstElement *color;
+  GstColorBalance *balance;
+  const GList *channels;
+  GList *l;
+  guint percent = 0;
+
+  /* Find something supporting GstColorBalance */
+  color = gst_bin_get_by_interface (GST_BIN (src), GST_TYPE_COLOR_BALANCE);
+
+  if (color == NULL)
+    return percent;
+
+  balance = GST_COLOR_BALANCE (color);
+
+  channels = gst_color_balance_list_channels (balance);
+
+  for (l = (GList *) channels; l != NULL; l = g_list_next (l))
+    {
+      GstColorBalanceChannel *c = GST_COLOR_BALANCE_CHANNEL (l->data);
+
+      if (g_ascii_strcasecmp (c->label, channel_names[channel]) == 0)
+        {
+          percent =
+            ((gst_color_balance_get_value (balance, c)
+                - c->min_value) * 100) /
+              (c->max_value - c->min_value);
+
+          break;
+        }
+    }
+
+  g_object_unref (color);
+
+  return percent;
+}
+
+
+guint
+empathy_video_src_get_supported_channels (GstElement *src)
+{
+  GstElement *color;
+  GstColorBalance *balance;
+  const GList *channels;
+  GList *l;
+  guint result = 0;
+
+  /* Find something supporting GstColorBalance */
+  color = gst_bin_get_by_interface (GST_BIN (src), GST_TYPE_COLOR_BALANCE);
+
+  if (color == NULL)
+    goto out;
+
+  balance = GST_COLOR_BALANCE (color);
+
+  channels = gst_color_balance_list_channels (balance);
+
+  for (l = (GList *) channels; l != NULL; l = g_list_next (l))
+    {
+      GstColorBalanceChannel *channel = GST_COLOR_BALANCE_CHANNEL (l->data);
+      int i;
+
+      for (i = 0; i < NR_EMPATHY_GST_VIDEO_SRC_CHANNELS; i++)
+        {
+          if (g_ascii_strcasecmp (channel->label, channel_names[i]) == 0)
+            {
+              result |= (1 << i);
+              break;
+            }
+        }
+    }
+
+  g_object_unref (color);
+
+out:
+  return result;
+}
+