[frogr] Port to GStreamer 1.0

[Dominique Leuenberger <dleuen src gnome org>]

commit f63040a689d3c2017a825de7a2e753d0a4a6884f
Author: Dominique Leuenberger <dimstar opensuse org>
Date:   Wed Feb 6 00:20:55 2013 +0100

    Port to GStreamer 1.0
    
    https://bugzilla.gnome.org/show_bug.cgi?id=693230

 configure.ac     |    4 +-
 src/frogr-util.c |   56 +++++++++--------------------------------------------
 2 files changed, 12 insertions(+), 48 deletions(-)
---
diff --git a/configure.ac b/configure.ac
index 5b1622c..a520f60 100644
--- a/configure.ac
+++ b/configure.ac
@@ -38,8 +38,8 @@ PKG_CHECK_MODULES(LIBXML2, libxml-2.0 >= $LIBXML2_MIN_VERSION)
 FROGR_CFLAGS="$FROGR_CFLAGS $LIBXML2_CFLAGS"
 FROGR_LIBS="$FROGR_LIBS $LIBXML2_LIBS"
 
-GSTREAMER_MIN_VERSION=0.10
-PKG_CHECK_MODULES(GSTREAMER, gstreamer-0.10 >= $GSTREAMER_MIN_VERSION)
+GSTREAMER_MIN_VERSION=1.0
+PKG_CHECK_MODULES(GSTREAMER, gstreamer-1.0 >= $GSTREAMER_MIN_VERSION)
 FROGR_CFLAGS="$FROGR_CFLAGS $GSTREAMER_CFLAGS"
 FROGR_LIBS="$FROGR_LIBS $GSTREAMER_LIBS"
 
diff --git a/src/frogr-util.c b/src/frogr-util.c
index 8d59b84..d10bd98 100644
--- a/src/frogr-util.c
+++ b/src/frogr-util.c
@@ -28,6 +28,7 @@
 #include <glib/gi18n.h>
 #include <gtk/gtk.h>
 #include <gst/gst.h>
+#include <gst/base/gstbasesink.h>
 #include <libexif/exif-byte-order.h>
 #include <libexif/exif-data.h>
 #include <libexif/exif-entry.h>
@@ -35,7 +36,8 @@
 #include <libexif/exif-loader.h>
 #include <libexif/exif-tag.h>
 
-#define CAPS 
"video/x-raw-rgb,width=160,pixel-aspect-ratio=1/1,bpp=(int)24,depth=(int)24,endianness=(int)4321,red_mask=(int)0xff0000,
 green_mask=(int)0x00ff00, blue_mask=(int)0x0000ff"
+#define CAPS "video/x-raw,format=RGB,width=160,pixel-aspect-ratio=1/1"
+#define PREROLL_TIMEOUT (5*GST_SECOND)
 
 static gboolean
 _spawn_command (const gchar* cmd)
@@ -370,20 +372,16 @@ _get_pixbuf_from_video_file (GFile *file, GError **out_error)
 {
   GdkPixbuf *pixbuf = NULL;
   GstElement *pipeline, *sink;
-  GstBuffer *buffer;
-  GstFormat format;
-  GstStateChangeReturn ret;
+  GstStateChangeReturn ret, sret;
   gchar *file_uri;
   gchar *descr;
-  gint width, height;
   gint64 duration, position;
   GError *error = NULL;
-  gboolean res;
 
   /* create a new pipeline */
   file_uri = g_file_get_uri (file);
-  descr = g_strdup_printf ("uridecodebin uri=%s ! ffmpegcolorspace ! videoscale ! "
-                           " appsink name=sink caps=\"" CAPS "\"", file_uri);
+  descr = g_strdup_printf ("uridecodebin uri=%s ! videoconvert ! videoscale "
+                           " ! " CAPS " ! gdkpixbufsink name=sink", file_uri);
   g_free (file_uri);
 
   pipeline = gst_parse_launch (descr, &error);
@@ -423,8 +421,7 @@ _get_pixbuf_from_video_file (GFile *file, GError **out_error)
   }
 
   /* get the duration */
-  format = GST_FORMAT_TIME;
-  gst_element_query_duration (pipeline, &format, &duration);
+  gst_element_query_duration (pipeline, GST_FORMAT_TIME, &duration);
 
   if (duration != -1)
     /* we have a duration, seek to 50% */
@@ -439,43 +436,10 @@ _get_pixbuf_from_video_file (GFile *file, GError **out_error)
   gst_element_seek_simple (pipeline, GST_FORMAT_TIME,
       GST_SEEK_FLAG_KEY_UNIT | GST_SEEK_FLAG_FLUSH, position);
 
-  /* get the preroll buffer from appsink, this block untils appsink really prerolls */
-  g_signal_emit_by_name (sink, "pull-preroll", &buffer, NULL);
-
-  /* if we have a buffer now, convert it to a pixbuf. It's possible that we
-   * don't have a buffer because we went EOS right away or had an error. */
-  if (buffer) {
-    GstCaps *caps;
-    GstStructure *s;
-
-    /* get the snapshot buffer format now. We set the caps on the appsink so
-     * that it can only be an rgb buffer. The only thing we have not specified
-     * on the caps is the height, which is dependant on the pixel-aspect-ratio
-     * of the source material */
-    caps = GST_BUFFER_CAPS (buffer);
-    if (!caps) {
-      DEBUG ("could not get snapshot format\n");
-      return NULL;
-    }
-    s = gst_caps_get_structure (caps, 0);
 
-    /* we need to get the final caps on the buffer to get the size */
-    res = gst_structure_get_int (s, "width", &width);
-    res |= gst_structure_get_int (s, "height", &height);
-    if (!res) {
-      DEBUG ("could not get snapshot dimension\n");
-      return NULL;
-    }
-
-    /* create pixmap from buffer and save, gstreamer video buffers have a stride
-     * that is rounded up to the nearest multiple of 4 */
-    pixbuf = gdk_pixbuf_new_from_data (GST_BUFFER_DATA (buffer),
-        GDK_COLORSPACE_RGB, FALSE, 8, width, height,
-        GST_ROUND_UP_4 (width * 3), NULL, NULL);
-
-  } else {
-    DEBUG ("could not make snapshot\n");
-  }
+  sret = gst_element_get_state (pipeline, NULL, NULL, PREROLL_TIMEOUT);
+  if (sret == GST_STATE_CHANGE_SUCCESS)
+      g_object_get (sink, "last-pixbuf", &pixbuf, NULL);
 
   /* cleanup and exit */
   gst_element_set_state (pipeline, GST_STATE_NULL);