--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/gst_plugins_good/ext/jpeg/gstsmokedec.c	Fri Apr 16 15:15:52 2010 +0300
@@ -0,0 +1,273 @@
+/* GStreamer
+ * Copyright (C) <1999> Erik Walthinsen <omega@cse.ogi.edu>
+ *
+ * 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 <string.h>
+
+/*#define DEBUG_ENABLED*/
+#include "gstsmokedec.h"
+#include <gst/video/video.h>
+
+/* elementfactory information */
+static const GstElementDetails gst_smokedec_details =
+GST_ELEMENT_DETAILS ("Smoke video decoder",
+    "Codec/Decoder/Video",
+    "Decode video from Smoke format",
+    "Wim Taymans <wim@fluendo.com>");
+
+GST_DEBUG_CATEGORY (smokedec_debug);
+#define GST_CAT_DEFAULT smokedec_debug
+
+/* SmokeDec signals and args */
+enum
+{
+  LAST_SIGNAL
+};
+
+enum
+{
+  PROP_0
+};
+
+static void gst_smokedec_base_init (gpointer g_class);
+static void gst_smokedec_class_init (GstSmokeDec * klass);
+static void gst_smokedec_init (GstSmokeDec * smokedec);
+
+static GstFlowReturn gst_smokedec_chain (GstPad * pad, GstBuffer * buf);
+
+static GstElementClass *parent_class = NULL;
+
+/*static guint gst_smokedec_signals[LAST_SIGNAL] = { 0 }; */
+
+GType
+gst_smokedec_get_type (void)
+{
+  static GType smokedec_type = 0;
+
+  if (!smokedec_type) {
+    static const GTypeInfo smokedec_info = {
+      sizeof (GstSmokeDecClass),
+      gst_smokedec_base_init,
+      NULL,
+      (GClassInitFunc) gst_smokedec_class_init,
+      NULL,
+      NULL,
+      sizeof (GstSmokeDec),
+      0,
+      (GInstanceInitFunc) gst_smokedec_init,
+    };
+
+    smokedec_type =
+        g_type_register_static (GST_TYPE_ELEMENT, "GstSmokeDec", &smokedec_info,
+        0);
+  }
+  return smokedec_type;
+}
+
+static GstStaticPadTemplate gst_smokedec_src_pad_template =
+GST_STATIC_PAD_TEMPLATE ("src",
+    GST_PAD_SRC,
+    GST_PAD_ALWAYS,
+    GST_STATIC_CAPS (GST_VIDEO_CAPS_YUV ("I420"))
+    );
+
+static GstStaticPadTemplate gst_smokedec_sink_pad_template =
+GST_STATIC_PAD_TEMPLATE ("sink",
+    GST_PAD_SINK,
+    GST_PAD_ALWAYS,
+    GST_STATIC_CAPS ("video/x-smoke, "
+        "width = (int) [ 16, 4096 ], "
+        "height = (int) [ 16, 4096 ], " "framerate = (fraction) [ 0/1, MAX ]")
+    );
+
+static void
+gst_smokedec_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 (&gst_smokedec_src_pad_template));
+  gst_element_class_add_pad_template (element_class,
+      gst_static_pad_template_get (&gst_smokedec_sink_pad_template));
+  gst_element_class_set_details (element_class, &gst_smokedec_details);
+}
+
+static void
+gst_smokedec_class_init (GstSmokeDec * klass)
+{
+  GstElementClass *gstelement_class;
+
+  gstelement_class = (GstElementClass *) klass;
+
+  parent_class = g_type_class_peek_parent (klass);
+
+  GST_DEBUG_CATEGORY_INIT (smokedec_debug, "smokedec", 0, "Smoke decoder");
+}
+
+static void
+gst_smokedec_init (GstSmokeDec * smokedec)
+{
+  GST_DEBUG_OBJECT (smokedec, "gst_smokedec_init: initializing");
+  /* create the sink and src pads */
+
+  smokedec->sinkpad =
+      gst_pad_new_from_static_template (&gst_smokedec_sink_pad_template,
+      "sink");
+  gst_pad_set_chain_function (smokedec->sinkpad, gst_smokedec_chain);
+  gst_element_add_pad (GST_ELEMENT (smokedec), smokedec->sinkpad);
+
+  smokedec->srcpad =
+      gst_pad_new_from_static_template (&gst_smokedec_src_pad_template, "src");
+  gst_pad_use_fixed_caps (smokedec->srcpad);
+  gst_element_add_pad (GST_ELEMENT (smokedec), smokedec->srcpad);
+
+  /* reset the initial video state */
+  smokedec->format = -1;
+  smokedec->width = -1;
+  smokedec->height = -1;
+  smokedec->fps_num = -1;
+  smokedec->fps_denom = -1;
+  smokedec->next_time = 0;
+
+  smokecodec_decode_new (&smokedec->info);
+}
+
+static GstFlowReturn
+gst_smokedec_chain (GstPad * pad, GstBuffer * buf)
+{
+  GstSmokeDec *smokedec;
+  guint8 *data, *outdata;
+  gulong size, outsize;
+  GstBuffer *outbuf;
+  SmokeCodecFlags flags;
+  GstClockTime time;
+  guint width, height;
+  guint fps_num, fps_denom;
+  gint smokeret;
+  GstFlowReturn ret;
+
+  smokedec = GST_SMOKEDEC (gst_pad_get_parent (pad));
+
+  data = GST_BUFFER_DATA (buf);
+  size = GST_BUFFER_SIZE (buf);
+  time = GST_BUFFER_TIMESTAMP (buf);
+
+  GST_DEBUG_OBJECT (smokedec,
+      "gst_smokedec_chain: got buffer of %ld bytes in '%s'", size,
+      GST_OBJECT_NAME (smokedec));
+
+  /* have the ID packet. */
+  if (data[0] == SMOKECODEC_TYPE_ID) {
+    smokeret = smokecodec_parse_id (smokedec->info, data, size);
+    if (smokeret != SMOKECODEC_OK)
+      goto header_error;
+
+    ret = GST_FLOW_OK;
+    goto done;
+  }
+
+  /* now handle data packets */
+  GST_DEBUG_OBJECT (smokedec, "gst_smokedec_chain: reading header %08lx",
+      *(gulong *) data);
+  smokecodec_parse_header (smokedec->info, data, size, &flags, &width, &height,
+      &fps_num, &fps_denom);
+
+  if (smokedec->height != height || smokedec->width != width ||
+      smokedec->fps_num != fps_num || smokedec->fps_denom != fps_denom) {
+    GstCaps *caps;
+
+    smokedec->height = height;
+    smokedec->width = width;
+
+    caps = gst_caps_new_simple ("video/x-raw-yuv",
+        "format", GST_TYPE_FOURCC, GST_MAKE_FOURCC ('I', '4', '2', '0'),
+        "width", G_TYPE_INT, width,
+        "height", G_TYPE_INT, height,
+        "framerate", GST_TYPE_FRACTION, fps_num, fps_denom, NULL);
+
+    gst_pad_set_caps (smokedec->srcpad, caps);
+    gst_caps_unref (caps);
+  }
+
+
+  if (smokedec->need_keyframe) {
+    if (!(flags & SMOKECODEC_KEYFRAME))
+      goto keyframe_skip;
+
+    smokedec->need_keyframe = FALSE;
+  }
+
+  outbuf = gst_buffer_new ();
+  outsize = GST_BUFFER_SIZE (outbuf) = width * height + width * height / 2;
+  outdata = g_malloc (outsize);
+  GST_BUFFER_DATA (outbuf) = outdata;
+  GST_BUFFER_MALLOCDATA (outbuf) = outdata;
+
+  GST_BUFFER_DURATION (outbuf) = GST_SECOND * fps_denom / fps_num;
+  GST_BUFFER_OFFSET (outbuf) = GST_BUFFER_OFFSET (buf);
+  gst_buffer_set_caps (outbuf, GST_PAD_CAPS (smokedec->srcpad));
+
+  if (time == GST_CLOCK_TIME_NONE) {
+    if (GST_BUFFER_OFFSET (buf) == -1) {
+      time = smokedec->next_time;
+    } else {
+      time = GST_BUFFER_OFFSET (buf) * GST_BUFFER_DURATION (outbuf);
+    }
+  }
+  GST_BUFFER_TIMESTAMP (outbuf) = time;
+  smokedec->next_time = time + GST_BUFFER_DURATION (outbuf);
+
+  smokeret = smokecodec_decode (smokedec->info, data, size, outdata);
+  if (smokeret != SMOKECODEC_OK)
+    goto decode_error;
+
+  GST_DEBUG_OBJECT (smokedec, "gst_smokedec_chain: sending buffer");
+  ret = gst_pad_push (smokedec->srcpad, outbuf);
+
+done:
+  gst_buffer_unref (buf);
+  gst_object_unref (smokedec);
+
+  return ret;
+
+  /* ERRORS */
+header_error:
+  {
+    GST_ELEMENT_ERROR (smokedec, STREAM, DECODE,
+        (NULL), ("Could not parse smoke header, reason: %d", smokeret));
+    ret = GST_FLOW_ERROR;
+    goto done;
+  }
+keyframe_skip:
+  {
+    GST_DEBUG_OBJECT (smokedec, "dropping buffer while waiting for keyframe");
+    ret = GST_FLOW_OK;
+    goto done;
+  }
+decode_error:
+  {
+    GST_ELEMENT_ERROR (smokedec, STREAM, DECODE,
+        (NULL), ("Could not decode smoke frame, reason: %d", smokeret));
+    ret = GST_FLOW_ERROR;
+    goto done;
+  }
+}