A little pluggy to make sense out of the random chunks we get from multifilesrc.

Original commit message from CVS:
* configure.ac:
* gst/videoparse/Makefile.am:
* gst/videoparse/gstvideoparse.c:
A little pluggy to make sense out of the random chunks we get
from multifilesrc.

2 files changed, 390 insertions, 0 deletions

diff --git a/gst/videoparse/Makefile.am b/gst/videoparse/Makefile.am
new file mode 100644
index 00000000..7cc5fd2a
--- /dev/null
+++ b/gst/videoparse/Makefile.am
@@ -0,0 +1,8 @@
+
+plugin_LTLIBRARIES = libgstvideoparse.la
+
+libgstvideoparse_la_SOURCES = gstvideoparse.c
+libgstvideoparse_la_CFLAGS = $(GST_CFLAGS)
+libgstvideoparse_la_LIBADD = $(GST_LIBS) $(GST_BASE_LIBS)
+libgstvideoparse_la_LDFLAGS = $(GST_PLUGIN_LDFLAGS)
+
diff --git a/gst/videoparse/gstvideoparse.c b/gst/videoparse/gstvideoparse.c
new file mode 100644
index 00000000..98378443
--- /dev/null
+++ b/gst/videoparse/gstvideoparse.c
@@ -0,0 +1,382 @@
+/* GStreamer
+ * Copyright (C) 2006 David A. Schleef <ds@schleef.org>
+ *
+ * gstvideoparse.c:
+ *
+ * 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-videoparse
+ * @short_description: parses a byte stream into video frames
+ *
+ * Converts a byte stream into video frames.
+ */
+
+#ifdef HAVE_CONFIG_H
+#  include "config.h"
+#endif
+
+#include <gst/gst.h>
+#include <gst/base/gstbasetransform.h>
+
+#define GST_TYPE_VIDEO_PARSE \
+  (gst_video_parse_get_type())
+#define GST_VIDEO_PARSE(obj) \
+  (G_TYPE_CHECK_INSTANCE_CAST((obj),GST_TYPE_VIDEO_PARSE,GstVideoParse))
+#define GST_VIDEO_PARSE_CLASS(klass) \
+  (G_TYPE_CHECK_CLASS_CAST((klass),GST_TYPE_VIDEO_PARSE,GstVideoParseClass))
+#define GST_IS_VIDEO_PARSE(obj) \
+  (G_TYPE_CHECK_INSTANCE_TYPE((obj),GST_TYPE_VIDEO_PARSE))
+#define GST_IS_VIDEO_PARSE_CLASS(klass) \
+  (G_TYPE_CHECK_CLASS_TYPE((klass),GST_TYPE_VIDEO_PARSE))
+
+typedef struct _GstVideoParse GstVideoParse;
+typedef struct _GstVideoParseClass GstVideoParseClass;
+
+struct _GstVideoParse
+{
+  GstElement parent;
+
+  GstPad *sinkpad;
+  GstPad *srcpad;
+
+  int fps_n;
+  int fps_d;
+
+  int frame_num;
+
+  GstSegment segment;
+
+  int negotiated;
+};
+
+struct _GstVideoParseClass
+{
+  GstElementClass parent_class;
+};
+
+
+static void gst_video_parse_dispose (GObject * object);
+
+static void gst_video_parse_set_property (GObject * object, guint prop_id,
+    const GValue * value, GParamSpec * pspec);
+static void gst_video_parse_get_property (GObject * object, guint prop_id,
+    GValue * value, GParamSpec * pspec);
+
+static GstFlowReturn gst_video_parse_chain (GstPad * pad, GstBuffer * buffer);
+static gboolean gst_video_parse_event (GstPad * pad, GstEvent * event);
+static gboolean gst_video_parse_set_caps (GstPad * pad, GstCaps * caps);
+static gboolean gst_video_parse_src_query (GstPad * pad, GstQuery * query);
+
+
+static GstStaticPadTemplate gst_video_parse_src_pad_template =
+GST_STATIC_PAD_TEMPLATE ("src",
+    GST_PAD_SRC,
+    GST_PAD_ALWAYS,
+    GST_STATIC_CAPS_ANY);
+
+static GstStaticPadTemplate gst_video_parse_sink_pad_template =
+GST_STATIC_PAD_TEMPLATE ("sink",
+    GST_PAD_SINK,
+    GST_PAD_ALWAYS,
+    GST_STATIC_CAPS_ANY);
+
+GST_DEBUG_CATEGORY_STATIC (gst_video_parse_debug);
+#define GST_CAT_DEFAULT gst_video_parse_debug
+
+static const GstElementDetails gst_video_parse_details =
+GST_ELEMENT_DETAILS ("Video Parse",
+    "Filter/Video",
+    "Converts stream into video frames",
+    "David Schleef <ds@schleef.org>");
+
+enum
+{
+  ARG_0
+};
+
+
+GST_BOILERPLATE (GstVideoParse, gst_video_parse, GstElement, GST_TYPE_ELEMENT);
+
+static void
+gst_video_parse_base_init (gpointer g_class)
+{
+  GstElementClass *gstelement_class = GST_ELEMENT_CLASS (g_class);
+
+  GST_DEBUG_CATEGORY_INIT (gst_video_parse_debug, "videoparse", 0,
+      "videoparse element");
+
+  gst_element_class_add_pad_template (gstelement_class,
+      gst_static_pad_template_get (&gst_video_parse_src_pad_template));
+  gst_element_class_add_pad_template (gstelement_class,
+      gst_static_pad_template_get (&gst_video_parse_sink_pad_template));
+  gst_element_class_set_details (gstelement_class, &gst_video_parse_details);
+}
+
+static void
+gst_video_parse_class_init (GstVideoParseClass * klass)
+{
+  GObjectClass *gobject_class = G_OBJECT_CLASS (klass);
+
+  //GstElementClass *gstelement_class = GST_ELEMENT_CLASS (klass);
+
+  gobject_class->set_property = gst_video_parse_set_property;
+  gobject_class->get_property = gst_video_parse_get_property;
+
+  gobject_class->dispose = gst_video_parse_dispose;
+}
+
+static void
+gst_video_parse_init (GstVideoParse * vp, GstVideoParseClass * g_class)
+{
+  vp->sinkpad =
+      gst_pad_new_from_static_template (&gst_video_parse_sink_pad_template,
+      "sink");
+  gst_element_add_pad (GST_ELEMENT (vp), vp->sinkpad);
+
+  gst_pad_set_chain_function (vp->sinkpad, gst_video_parse_chain);
+  gst_pad_set_event_function (vp->sinkpad, gst_video_parse_event);
+
+  vp->srcpad =
+      gst_pad_new_from_static_template (&gst_video_parse_src_pad_template,
+      "src");
+  gst_element_add_pad (GST_ELEMENT (vp), vp->srcpad);
+
+  gst_pad_set_setcaps_function (vp->srcpad, gst_video_parse_set_caps);
+  gst_pad_set_query_function (vp->srcpad, gst_video_parse_src_query);
+}
+
+static void
+gst_video_parse_dispose (GObject * object)
+{
+  //GstVideoParse *vp = GST_VIDEO_PARSE (object);
+
+  G_OBJECT_CLASS (parent_class)->dispose (object);
+}
+
+static void
+gst_video_parse_set_property (GObject * object, guint prop_id,
+    const GValue * value, GParamSpec * pspec)
+{
+  //GstVideoParse *vp = GST_VIDEO_PARSE (object);
+
+  switch (prop_id) {
+    default:
+      G_OBJECT_WARN_INVALID_PROPERTY_ID (object, prop_id, pspec);
+      break;
+  }
+}
+
+static void
+gst_video_parse_get_property (GObject * object, guint prop_id, GValue * value,
+    GParamSpec * pspec)
+{
+  //GstVideoParse *vp = GST_VIDEO_PARSE (object);
+
+  switch (prop_id) {
+    default:
+      G_OBJECT_WARN_INVALID_PROPERTY_ID (object, prop_id, pspec);
+      break;
+  }
+}
+
+static gboolean
+gst_video_parse_negotiate (GstVideoParse * vp)
+{
+  GstCaps *caps;
+  gboolean ret = FALSE;
+
+  caps = gst_pad_peer_get_caps (vp->srcpad);
+
+  caps = gst_caps_make_writable (caps);
+  gst_caps_truncate (caps);
+
+  if (!gst_caps_is_empty (caps)) {
+    gst_pad_fixate_caps (vp->srcpad, caps);
+
+    if (gst_caps_is_any (caps)) {
+      ret = TRUE;
+    } else if (gst_caps_is_fixed (caps)) {
+      /* yay, fixed caps, use those then */
+      gst_pad_set_caps (vp->srcpad, caps);
+      ret = TRUE;
+    }
+  }
+
+  gst_caps_unref (caps);
+
+  return ret;
+}
+
+static GstFlowReturn
+gst_video_parse_chain (GstPad * pad, GstBuffer * buffer)
+{
+  GstVideoParse *vp = GST_VIDEO_PARSE (gst_pad_get_parent (pad));
+  GstFlowReturn ret;
+
+  GST_INFO ("here");
+
+  if (!vp->negotiated) {
+    gst_video_parse_negotiate (vp);
+    vp->negotiated = TRUE;
+  }
+
+  if (vp->fps_n) {
+    GST_BUFFER_TIMESTAMP (buffer) = vp->segment.start +
+        gst_util_uint64_scale (vp->frame_num, GST_SECOND * vp->fps_d,
+        vp->fps_n);
+    GST_BUFFER_DURATION (buffer) =
+        gst_util_uint64_scale (GST_SECOND, vp->fps_d, vp->fps_n);
+  } else {
+    GST_BUFFER_TIMESTAMP (buffer) = vp->segment.start;
+    GST_BUFFER_DURATION (buffer) = GST_CLOCK_TIME_NONE;
+  }
+  gst_buffer_set_caps (buffer, GST_PAD_CAPS (vp->srcpad));
+
+  vp->frame_num++;
+
+  ret = gst_pad_push (vp->srcpad, buffer);
+
+  gst_object_unref (vp);
+
+  return ret;
+}
+
+static gboolean
+gst_video_parse_event (GstPad * pad, GstEvent * event)
+{
+  GstVideoParse *vp = GST_VIDEO_PARSE (gst_pad_get_parent (pad));
+  gboolean ret;
+
+  switch (GST_EVENT_TYPE (event)) {
+    case GST_EVENT_NEWSEGMENT:
+    {
+      GstClockTimeDiff start, stop, time;
+      gdouble rate, arate;
+      gboolean update;
+      GstFormat format;
+
+      gst_event_parse_new_segment_full (event, &update, &rate, &arate, &format,
+          &start, &stop, &time);
+
+      if (format == GST_FORMAT_TIME) {
+        gst_segment_set_newsegment_full (&vp->segment, update, rate, arate,
+            format, start, stop, time);
+
+        GST_DEBUG_OBJECT (vp, "update segment: %" GST_SEGMENT_FORMAT,
+            &vp->segment);
+      } else {
+        GST_ERROR_OBJECT (vp,
+            "Segment doesn't have GST_FORMAT_TIME format (%d)", format);
+
+        gst_event_unref (event);
+        gst_object_unref (vp);
+        return FALSE;
+      }
+      break;
+    }
+    default:
+      break;
+  }
+
+  ret = gst_pad_push_event (vp->srcpad, event);
+  gst_object_unref (vp);
+
+  return ret;
+}
+
+static gboolean
+gst_video_parse_set_caps (GstPad * pad, GstCaps * caps)
+{
+  GstVideoParse *vp = GST_VIDEO_PARSE (gst_pad_get_parent (pad));
+  GstStructure *s;
+
+  s = gst_caps_get_structure (caps, 0);
+
+  vp->fps_n = 0;
+  vp->fps_d = 1;
+  gst_structure_get_fraction (s, "framerate", &vp->fps_n, &vp->fps_d);
+
+  GST_ERROR_OBJECT (vp, "framerate %d/%d", vp->fps_n, vp->fps_d);
+
+  gst_object_unref (vp);
+
+  return TRUE;
+}
+
+static gboolean
+gst_video_parse_src_query (GstPad * pad, GstQuery * query)
+{
+  GstVideoParse *vp = GST_VIDEO_PARSE (gst_pad_get_parent (pad));
+  gboolean ret = TRUE;
+
+  if (GST_QUERY_TYPE (query) == GST_QUERY_CONVERT) {
+    GstFormat src_fmt, dest_fmt;
+    gint64 src_val, dest_val;
+
+    gst_query_parse_convert (query, &src_fmt, &src_val, &dest_fmt, &dest_val);
+    if (src_fmt == dest_fmt) {
+      dest_val = src_val;
+    } else if (src_fmt == GST_FORMAT_DEFAULT && dest_fmt == GST_FORMAT_TIME) {
+      /* frames to time */
+
+      if (vp->fps_n) {
+        dest_val = gst_util_uint64_scale (src_val, vp->fps_d * GST_SECOND,
+            vp->fps_d);
+      } else {
+        dest_val = 0;
+      }
+    } else if (src_fmt == GST_FORMAT_DEFAULT && dest_fmt == GST_FORMAT_TIME) {
+      /* time to frames */
+
+      if (vp->fps_n) {
+        dest_val = gst_util_uint64_scale (src_val, vp->fps_n,
+            vp->fps_d * GST_SECOND);
+      } else {
+        dest_val = 0;
+      }
+    } else {
+      GST_DEBUG_OBJECT (vp, "query failed");
+      ret = FALSE;
+    }
+
+    gst_query_set_convert (query, src_fmt, src_val, dest_fmt, dest_val);
+  } else {
+    ret = GST_ELEMENT_CLASS (parent_class)->query (GST_ELEMENT (vp), query);
+  }
+
+  gst_object_unref (vp);
+  return ret;
+}
+
+
+
+
+
+static gboolean
+plugin_init (GstPlugin * plugin)
+{
+  gst_element_register (plugin, "videoparse", GST_RANK_NONE,
+      gst_video_parse_get_type ());
+
+  return TRUE;
+}
+
+GST_PLUGIN_DEFINE (GST_VERSION_MAJOR,
+    GST_VERSION_MINOR,
+    "videoparse",
+    "Parses byte streams into video frames",
+    plugin_init, VERSION, "LGPL", GST_PACKAGE_NAME, GST_PACKAGE_ORIGIN);