docs/plugins/: Added dvdec and dvdemux to docs.

Original commit message from CVS:
* docs/plugins/Makefile.am:
* docs/plugins/gst-plugins-good-plugins-docs.sgml:
* docs/plugins/gst-plugins-good-plugins-sections.txt:
Added dvdec and dvdemux to docs.

* ext/dv/gstdvdec.c: (gst_dvdec_base_init), (gst_dvdec_chain):
Added docs.
Check frame sizes so we don't crash when don't have enough
data.
Send nice error messages on error.

* ext/dv/gstdvdemux.c: (gst_dvdemux_base_init),
(gst_dvdemux_class_init), (gst_dvdemux_init),
(gst_dvdemux_finalize), (gst_dvdemux_reset),
(gst_dvdemux_src_convert), (gst_dvdemux_sink_convert),
(gst_dvdemux_src_query), (gst_dvdemux_sink_query),
(gst_dvdemux_push_event), (gst_dvdemux_handle_sink_event),
(gst_dvdemux_convert_src_pair), (gst_dvdemux_convert_sink_pair),
(gst_dvdemux_convert_src_to_sink), (gst_dvdemux_handle_push_seek),
(gst_dvdemux_do_seek), (gst_dvdemux_handle_pull_seek),
(gst_dvdemux_handle_src_event), (gst_dvdemux_demux_audio),
(gst_dvdemux_demux_video), (gst_dvdemux_demux_frame),
(gst_dvdemux_flush), (gst_dvdemux_chain), (gst_dvdemux_loop),
(gst_dvdemux_sink_activate_push), (gst_dvdemux_sink_activate_pull),
(gst_dvdemux_sink_activate), (gst_dvdemux_change_state):
* ext/dv/gstdvdemux.h:
Added docs.
Implement pull mode.
Fix memleaks.
Reduce memcpy for the video demuxing.

ChangeLog

@@ -1,3 +1,36 @@
+2006-02-28  Wim Taymans  <wim@fluendo.com>
+
+	* docs/plugins/Makefile.am:
+	* docs/plugins/gst-plugins-good-plugins-docs.sgml:
+	* docs/plugins/gst-plugins-good-plugins-sections.txt:
+	Added dvdec and dvdemux to docs.
+
+	* ext/dv/gstdvdec.c: (gst_dvdec_base_init), (gst_dvdec_chain):
+	Added docs.
+	Check frame sizes so we don't crash when don't have enough
+	data.
+	Send nice error messages on error.
+
+	* ext/dv/gstdvdemux.c: (gst_dvdemux_base_init),
+	(gst_dvdemux_class_init), (gst_dvdemux_init),
+	(gst_dvdemux_finalize), (gst_dvdemux_reset),
+	(gst_dvdemux_src_convert), (gst_dvdemux_sink_convert),
+	(gst_dvdemux_src_query), (gst_dvdemux_sink_query),
+	(gst_dvdemux_push_event), (gst_dvdemux_handle_sink_event),
+	(gst_dvdemux_convert_src_pair), (gst_dvdemux_convert_sink_pair),
+	(gst_dvdemux_convert_src_to_sink), (gst_dvdemux_handle_push_seek),
+	(gst_dvdemux_do_seek), (gst_dvdemux_handle_pull_seek),
+	(gst_dvdemux_handle_src_event), (gst_dvdemux_demux_audio),
+	(gst_dvdemux_demux_video), (gst_dvdemux_demux_frame),
+	(gst_dvdemux_flush), (gst_dvdemux_chain), (gst_dvdemux_loop),
+	(gst_dvdemux_sink_activate_push), (gst_dvdemux_sink_activate_pull),
+	(gst_dvdemux_sink_activate), (gst_dvdemux_change_state):
+	* ext/dv/gstdvdemux.h:
+	Added docs.
+	Implement pull mode.
+	Fix memleaks.
+	Reduce memcpy for the video demuxing.
+
 2006-02-28  Jan Schmidt  <thaytan@mad.scientist.com>
 
 	* ext/annodex/gstcmmldec.c: (gst_cmml_dec_sink_event),

docs/plugins/Makefile.am

@@ -82,6 +82,8 @@ EXTRA_HFILES = \
 	$(top_srcdir)/gst/id3demux/gstid3demux.h \
 	$(top_srcdir)/ext/cairo/gsttimeoverlay.h \
 	$(top_srcdir)/ext/cdio/gstcdiocddasrc.h \
+	$(top_srcdir)/ext/dv/gstdvdec.h \
+	$(top_srcdir)/ext/dv/gstdvdemux.h \
 	$(top_srcdir)/ext/flac/gstflacdec.h \
 	$(top_srcdir)/ext/hal/gsthalaudiosink.h \
 	$(top_srcdir)/ext/hal/gsthalaudiosrc.h \

docs/plugins/gst-plugins-good-plugins-docs.sgml

@@ -17,6 +17,8 @@
     <xi:include href="xml/element-autovideosink.xml" />
     <xi:include href="xml/element-cairotimeoverlay.xml" />
     <xi:include href="xml/element-cdiocddasrc.xml" />
+    <xi:include href="xml/element-dvdec.xml" />
+    <xi:include href="xml/element-dvdemux.xml" />
     <xi:include href="xml/element-flacdec.xml" />
     <xi:include href="xml/element-goom.xml" />
     <xi:include href="xml/element-halaudiosink.xml" />

docs/plugins/gst-plugins-good-plugins-sections.txt

@@ -46,6 +46,22 @@ GstCdioCddaSrc
 GstCdioCddaSrcClass
 </SECTION>
 
+<SECTION>
+<FILE>element-dvdec</FILE>
+GstDVDec
+<TITLE>dvdec</TITLE>
+<SUBSECTION Standard>
+GstDVDecClass
+</SECTION>
+
+<SECTION>
+<FILE>element-dvdemux</FILE>
+GstDVDemux
+<TITLE>dvdemux</TITLE>
+<SUBSECTION Standard>
+GstDVDemuxClass
+</SECTION>
+
 <SECTION>
 <FILE>element-flacdec</FILE>
 GstFlacDec

ext/dv/gstdvdec.c

@@ -18,6 +18,30 @@
  * Boston, MA 02111-1307, USA.
  */
 
+/**
+ * SECTION:element-dvdec
+ *
+ * <refsect2>
+ * <para>
+ * dvdec decodes DV video into raw video. The element expects a full DV frame
+ * as input, which is 120000 bytes for NTSC and 144000 for PAL video.
+ * </para>
+ * <para>
+ * This element can perform simple frame dropping with the drop-factor
+ * property. Setting this property to a value N > 1 will only decode every 
+ * Nth frame.
+ * </para>
+ * <title>Example launch line</title>
+ * <para>
+ * <programlisting>
+ * gst-launch filesrc location=test.dv ! dvdemux name=demux ! dvdec ! xvimagesink
+ * </programlisting>
+ * This pipeline decodes and renders the raw DV stream to a videosink.
+ * </para>
+ * Last reviewed on 2006-02-28 (0.10.3)
+ * </refsect2>
+ */
+
 #ifdef HAVE_CONFIG_H
 #include "config.h"
 #endif
@@ -33,6 +57,9 @@ GST_ELEMENT_DETAILS ("DV (smpte314) decoder plugin",
     "Uses libdv to decode DV video (libdv.sourceforge.net)",
     "Erik Walthinsen <omega@cse.ogi.edu>," "Wim Taymans <wim@fluendo.com>");
 
+/* sizes of one input buffer */
+#define NTSC_BUFFER 120000
+#define PAL_BUFFER 144000
 
 #define DV_DEFAULT_QUALITY DV_QUALITY_BEST
 #define DV_DEFAULT_DECODE_NTH 1
@@ -265,12 +292,25 @@ gst_dvdec_chain (GstPad * pad, GstBuffer * buf)
   gint outframe_pitches[3];
   GstBuffer *outbuf;
   GstFlowReturn ret = GST_FLOW_OK;
+  guint length;
 
   dvdec = GST_DVDEC (gst_pad_get_parent (pad));
   inframe = GST_BUFFER_DATA (buf);
 
-  if (dv_parse_header (dvdec->decoder, inframe) < 0)
-    g_assert_not_reached ();
+  /* buffer should be at least the size of one NTSC frame, this should
+   * be enough to decode the header. */
+  if (G_UNLIKELY (GST_BUFFER_SIZE (buf) < NTSC_BUFFER))
+    goto wrong_size;
+
+  if (G_UNLIKELY (dv_parse_header (dvdec->decoder, inframe) < 0))
+    goto parse_header_error;
+
+  /* check the buffer is of right size after we know if we are
+   * dealing with PAL or NTSC */
+  length = (dvdec->PAL ? PAL_BUFFER : NTSC_BUFFER);
+  if (G_UNLIKELY (GST_BUFFER_SIZE (buf) < length))
+    goto wrong_size;
+
   dv_parse_packs (dvdec->decoder, inframe);
 
   if (dvdec->video_offset % dvdec->drop_factor != 0)
@@ -280,7 +320,7 @@ gst_dvdec_chain (GstPad * pad, GstBuffer * buf)
       gst_pad_alloc_buffer_and_set_caps (dvdec->srcpad, 0,
       (720 * dvdec->height) * dvdec->bpp,
       GST_PAD_CAPS (dvdec->srcpad), &outbuf);
-  if (ret != GST_FLOW_OK)
+  if (G_UNLIKELY (ret != GST_FLOW_OK))
     goto no_buffer;
 
   outframe = GST_BUFFER_DATA (outbuf);
@@ -306,19 +346,33 @@ gst_dvdec_chain (GstPad * pad, GstBuffer * buf)
   ret = gst_pad_push (dvdec->srcpad, outbuf);
 
 skip:
-  gst_buffer_unref (buf);
   dvdec->video_offset++;
+
+done:
+  gst_buffer_unref (buf);
   gst_object_unref (dvdec);
 
   return ret;
 
   /* ERRORS */
+wrong_size:
+  {
+    GST_ELEMENT_ERROR (dvdec, STREAM, DECODE,
+        (NULL), ("Input buffer too small"));
+    ret = GST_FLOW_ERROR;
+    goto done;
+  }
+parse_header_error:
+  {
+    GST_ELEMENT_ERROR (dvdec, STREAM, DECODE,
+        (NULL), ("Error parsing DV header"));
+    ret = GST_FLOW_ERROR;
+    goto done;
+  }
 no_buffer:
   {
     GST_DEBUG_OBJECT (dvdec, "could not allocate buffer");
-    gst_buffer_unref (buf);
-    gst_object_unref (dvdec);
-    return ret;
+    goto done;
   }
 }
 

ext/dv/gstdvdemux.h

@@ -42,6 +42,9 @@ G_BEGIN_DECLS
 typedef struct _GstDVDemux GstDVDemux;
 typedef struct _GstDVDemuxClass GstDVDemuxClass;
 
+typedef gboolean (*GstDVDemuxSeekHandler) (GstDVDemux *demux, GstPad * pad, GstEvent * event);
+
+
 struct _GstDVDemux {
   GstElement     element;
 
@@ -67,14 +70,14 @@ struct _GstDVDemux {
 
   gint           framecount;
   
-  guint64        timestamp;
-  guint64        duration;
-  gint64         total_frames;
-  guint64        audio_offset;
-  guint64        video_offset;
+  gint64         frame_offset;
+  gint64         audio_offset;
+  gint64         video_offset;
 
+  GstDVDemuxSeekHandler seek_handler;
   GstSegment     byte_segment;
   GstSegment     time_segment;
+  gboolean       running;
   gboolean       need_segment;
   gboolean       new_media;