ext/libmng/: Added basic MNG decoder. Needs more work. The encoder does not work yet.

Original commit message from CVS:
* ext/libmng/Makefile.am:
* ext/libmng/gstmng.c: (plugin_init):
* ext/libmng/gstmng.h:
* ext/libmng/gstmngdec.c: (gst_mngdec_get_type),
(gst_mngdec_base_init), (gst_mngdec_class_init),
(gst_mngdec_sinklink), (gst_mngdec_init), (gst_mngdec_src_getcaps),
(gst_mngdec_loop), (gst_mngdec_get_property),
(gst_mngdec_set_property), (mngdec_error), (mngdec_openstream),
(mngdec_closestream), (mngdec_handle_sink_event),
(mngdec_readdata), (mngdec_gettickcount), (mngdec_settimer),
(mngdec_processheader), (mngdec_getcanvasline), (mngdec_refresh),
(gst_mngdec_change_state):
* ext/libmng/gstmngdec.h:
* ext/libmng/gstmngenc.c: (gst_mngenc_get_type),
(mng_caps_factory), (raw_caps_factory), (gst_mngenc_base_init),
(gst_mngenc_class_init), (gst_mngenc_sinklink), (gst_mngenc_init),
(gst_mngenc_chain), (gst_mngenc_get_property),
(gst_mngenc_set_property):
* ext/libmng/gstmngenc.h:
Added basic MNG decoder. Needs more work. The encoder does
not work yet.

1 files changed, 249 insertions, 0 deletions

diff --git a/ext/libmng/gstmngenc.c b/ext/libmng/gstmngenc.c
new file mode 100644
index 00000000..53ad34a6
--- /dev/null
+++ b/ext/libmng/gstmngenc.c
@@ -0,0 +1,249 @@
+/* GStreamer
+ * Copyright (C) <1999> Erik Walthinsen <omega@cse.ogi.edu>
+ *
+ * Filter:
+ * Copyright (C) 2000 Donald A. Graft
+ *
+ * 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 <string.h>
+#include <gst/gst.h>
+#include "gstmngenc.h"
+#include <gst/video/video.h>
+
+#define MAX_HEIGHT		4096
+
+
+GstElementDetails gst_mngenc_details = {
+  "MNG encoder",
+  "Codec/Encoder/Image",
+  "Encode a video frame to an .mng video",
+  "Wim Taymans <wim@fluendo.com>",
+};
+
+
+/* Filter signals and args */
+enum
+{
+  /* FILL ME */
+  LAST_SIGNAL
+};
+
+#define DEFAULT_SNAPSHOT	TRUE
+
+enum
+{
+  ARG_0,
+  ARG_SNAPSHOT,
+  ARG_NEWMEDIA
+};
+
+static void gst_mngenc_base_init (gpointer g_class);
+static void gst_mngenc_class_init (GstMngEncClass * klass);
+static void gst_mngenc_init (GstMngEnc * mngenc);
+static void gst_mngenc_set_property (GObject * object,
+    guint prop_id, const GValue * value, GParamSpec * pspec);
+static void gst_mngenc_get_property (GObject * object,
+    guint prop_id, GValue * value, GParamSpec * pspec);
+
+static void gst_mngenc_chain (GstPad * pad, GstData * _data);
+
+GstPadTemplate *mngenc_src_template, *mngenc_sink_template;
+
+static GstElementClass *parent_class = NULL;
+
+
+GType
+gst_mngenc_get_type (void)
+{
+  static GType mngenc_type = 0;
+
+  if (!mngenc_type) {
+    static const GTypeInfo mngenc_info = {
+      sizeof (GstMngEncClass),
+      gst_mngenc_base_init,
+      NULL,
+      (GClassInitFunc) gst_mngenc_class_init,
+      NULL,
+      NULL,
+      sizeof (GstMngEnc),
+      0,
+      (GInstanceInitFunc) gst_mngenc_init,
+    };
+
+    mngenc_type = g_type_register_static (GST_TYPE_ELEMENT, "GstMngEnc",
+        &mngenc_info, 0);
+  }
+  return mngenc_type;
+}
+
+static GstCaps *
+mng_caps_factory (void)
+{
+  return gst_caps_new_simple ("video/x-mng",
+      "width", GST_TYPE_INT_RANGE, 16, 4096,
+      "height", GST_TYPE_INT_RANGE, 16, 4096,
+      "framerate", GST_TYPE_DOUBLE_RANGE, 0.0, G_MAXDOUBLE, NULL);
+}
+
+
+static GstCaps *
+raw_caps_factory (void)
+{
+  return gst_caps_from_string (GST_VIDEO_CAPS_RGB);
+}
+
+static void
+gst_mngenc_base_init (gpointer g_class)
+{
+  GstElementClass *element_class = GST_ELEMENT_CLASS (g_class);
+  GstCaps *raw_caps, *mng_caps;
+
+  raw_caps = raw_caps_factory ();
+  mng_caps = mng_caps_factory ();
+
+  mngenc_sink_template = gst_pad_template_new ("sink", GST_PAD_SINK,
+      GST_PAD_ALWAYS, raw_caps);
+
+  mngenc_src_template = gst_pad_template_new ("src", GST_PAD_SRC,
+      GST_PAD_ALWAYS, mng_caps);
+
+  gst_element_class_add_pad_template (element_class, mngenc_sink_template);
+  gst_element_class_add_pad_template (element_class, mngenc_src_template);
+  gst_element_class_set_details (element_class, &gst_mngenc_details);
+}
+
+static void
+gst_mngenc_class_init (GstMngEncClass * klass)
+{
+  GObjectClass *gobject_class;
+  GstElementClass *gstelement_class;
+
+  gobject_class = (GObjectClass *) klass;
+  gstelement_class = (GstElementClass *) klass;
+
+  parent_class = g_type_class_ref (GST_TYPE_ELEMENT);
+
+  g_object_class_install_property (gobject_class, ARG_SNAPSHOT,
+      g_param_spec_boolean ("snapshot", "Snapshot",
+          "Send EOS after encoding a frame, useful for snapshots",
+          DEFAULT_SNAPSHOT, (GParamFlags) G_PARAM_READWRITE));
+
+  g_object_class_install_property (gobject_class, ARG_NEWMEDIA,
+      g_param_spec_boolean ("newmedia", "newmedia",
+          "Send new media discontinuity after encoding each frame",
+          FALSE, (GParamFlags) G_PARAM_READWRITE));
+
+  gstelement_class->get_property = gst_mngenc_get_property;
+  gstelement_class->set_property = gst_mngenc_set_property;
+}
+
+
+static GstPadLinkReturn
+gst_mngenc_sinklink (GstPad * pad, const GstCaps * caps)
+{
+  GstMngEnc *mngenc;
+  gdouble fps;
+  GstStructure *structure;
+
+  mngenc = GST_MNGENC (gst_pad_get_parent (pad));
+
+  structure = gst_caps_get_structure (caps, 0);
+  gst_structure_get_int (structure, "width", &mngenc->width);
+  gst_structure_get_int (structure, "height", &mngenc->height);
+  gst_structure_get_double (structure, "framerate", &fps);
+  gst_structure_get_int (structure, "bpp", &mngenc->bpp);
+
+  caps = gst_caps_new_simple ("video/x-mng",
+      "framerate", G_TYPE_DOUBLE, fps,
+      "width", G_TYPE_INT, mngenc->width,
+      "height", G_TYPE_INT, mngenc->height, NULL);
+
+  return gst_pad_try_set_caps (mngenc->srcpad, caps);
+}
+
+static void
+gst_mngenc_init (GstMngEnc * mngenc)
+{
+  mngenc->sinkpad = gst_pad_new_from_template (mngenc_sink_template, "sink");
+  gst_element_add_pad (GST_ELEMENT (mngenc), mngenc->sinkpad);
+
+  mngenc->srcpad = gst_pad_new ("src", GST_PAD_SRC);
+  gst_element_add_pad (GST_ELEMENT (mngenc), mngenc->srcpad);
+
+  gst_pad_set_chain_function (mngenc->sinkpad, gst_mngenc_chain);
+  gst_pad_set_link_function (mngenc->sinkpad, gst_mngenc_sinklink);
+
+  mngenc->snapshot = DEFAULT_SNAPSHOT;
+  mngenc->newmedia = FALSE;
+}
+
+static void
+gst_mngenc_chain (GstPad * pad, GstData * _data)
+{
+  GstBuffer *buf = GST_BUFFER (_data);
+  GstMngEnc *mngenc;
+
+  mngenc = GST_MNGENC (gst_pad_get_parent (pad));
+
+  /* FIXME, do something here */
+
+  gst_buffer_unref (buf);
+}
+
+
+static void
+gst_mngenc_get_property (GObject * object,
+    guint prop_id, GValue * value, GParamSpec * pspec)
+{
+  GstMngEnc *mngenc;
+
+  mngenc = GST_MNGENC (object);
+
+  switch (prop_id) {
+    case ARG_SNAPSHOT:
+      g_value_set_boolean (value, mngenc->snapshot);
+      break;
+    case ARG_NEWMEDIA:
+      g_value_set_boolean (value, mngenc->newmedia);
+      break;
+    default:
+      G_OBJECT_WARN_INVALID_PROPERTY_ID (object, prop_id, pspec);
+      break;
+  }
+}
+
+
+static void
+gst_mngenc_set_property (GObject * object,
+    guint prop_id, const GValue * value, GParamSpec * pspec)
+{
+  GstMngEnc *mngenc;
+
+  mngenc = GST_MNGENC (object);
+
+  switch (prop_id) {
+    case ARG_SNAPSHOT:
+      mngenc->snapshot = g_value_get_boolean (value);
+      break;
+    case ARG_NEWMEDIA:
+      mngenc->newmedia = g_value_get_boolean (value);
+      break;
+    default:
+      G_OBJECT_WARN_INVALID_PROPERTY_ID (object, prop_id, pspec);
+      break;
+  }
+}