gst/mxf/: Add fundamental support for DV-DIF essence streams.

Original commit message from CVS:
* gst/mxf/Makefile.am:
* gst/mxf/mxfdemux.c:
(gst_mxf_demux_handle_header_metadata_update_streams),
(gst_mxf_demux_handle_klv_packet):
* gst/mxf/mxfdv-dif.c: (mxf_is_dv_dif_essence_track),
(mxf_dv_dif_handle_essence_element), (mxf_dv_dif_create_caps):
* gst/mxf/mxfdv-dif.h:
* gst/mxf/mxfparse.c: (mxf_is_descriptive_metadata):
* gst/mxf/mxfparse.h:
Add fundamental support for DV-DIF essence streams.
Handle descriptive metadata packets as metadata packets.

ChangeLog

@@ -1,3 +1,18 @@
+2008-11-27  Sebastian Dröge  <sebastian.droege@collabora.co.uk>
+
+	* gst/mxf/Makefile.am:
+	* gst/mxf/mxfdemux.c:
+	(gst_mxf_demux_handle_header_metadata_update_streams),
+	(gst_mxf_demux_handle_klv_packet):
+	* gst/mxf/mxfdv-dif.c: (mxf_is_dv_dif_essence_track),
+	(mxf_dv_dif_handle_essence_element), (mxf_dv_dif_create_caps):
+	* gst/mxf/mxfdv-dif.h:
+	* gst/mxf/mxfparse.c: (mxf_is_descriptive_metadata):
+	* gst/mxf/mxfparse.h:
+	Add fundamental support for DV-DIF essence streams.
+
+	Handle descriptive metadata packets as metadata packets.
+
 2008-11-27  Sebastian Dröge  <sebastian.droege@collabora.co.uk>
 
 	* gst/mxf/mxfdemux.c: (gst_mxf_demux_reset),

gst/mxf/Makefile.am

@@ -5,7 +5,8 @@ libgstmxf_la_SOURCES = \
 	mxfdemux.c \
 	mxfparse.c \
 	mxfaes-bwf.c \
-	mxfmpeg.c
+	mxfmpeg.c \
+	mxfdv-dif.c
 
 libgstmxf_la_CFLAGS = $(GST_CFLAGS) $(GST_BASE_CFLAGS)
 libgstmxf_la_LIBADD = $(GST_LIBS) $(GST_BASE_LIBS)
@@ -16,5 +17,6 @@ noinst_HEADERS = \
 	mxfparse.h \
 	mxfaes-bwf.h \
 	mxfmpeg.h \
+	mxfdv-dif.h \
 	mxftypes.h
 

gst/mxf/mxfdemux.c

@@ -33,6 +33,7 @@
 #include "mxfparse.h"
 #include "mxfaes-bwf.h"
 #include "mxfmpeg.h"
+#include "mxfdv-dif.h"
 
 #include <string.h>
 
@@ -1274,9 +1275,8 @@ gst_mxf_demux_handle_header_metadata_resolve_references (GstMXFDemux * demux)
           MXFMetadataEssenceContainerData, i);
 
       for (j = 0; j < demux->content_storage.n_essence_container_data; j++) {
-        if (mxf_ul_is_equal (&demux->
-                content_storage.essence_container_data_uids[j],
-                &data->instance_uid)) {
+        if (mxf_ul_is_equal (&demux->content_storage.
+                essence_container_data_uids[j], &data->instance_uid)) {
           demux->content_storage.essence_container_data[j] = data;
           break;
         }
@@ -1812,14 +1812,26 @@ choose_package:
           caps =
               mxf_mpeg_video_create_caps (source_package, source_track,
               &pad->tags, &pad->handle_essence_element, &pad->mapping_data);
+        else if (mxf_is_dv_dif_essence_track (source_track))
+          caps =
+              mxf_dv_dif_create_caps (source_package, source_track,
+              &pad->tags, &pad->handle_essence_element, &pad->mapping_data);
         break;
       case MXF_METADATA_TRACK_SOUND_ESSENCE:
         if (mxf_is_aes_bwf_essence_track (source_track))
           caps =
               mxf_aes_bwf_create_caps (source_package, source_track, &pad->tags,
               &pad->handle_essence_element, &pad->mapping_data);
+        else if (mxf_is_dv_dif_essence_track (source_track))
+          caps =
+              mxf_dv_dif_create_caps (source_package, source_track,
+              &pad->tags, &pad->handle_essence_element, &pad->mapping_data);
         break;
       case MXF_METADATA_TRACK_DATA_ESSENCE:
+        if (mxf_is_dv_dif_essence_track (source_track))
+          caps =
+              mxf_dv_dif_create_caps (source_package, source_track,
+              &pad->tags, &pad->handle_essence_element, &pad->mapping_data);
         break;
       default:
         g_assert_not_reached ();
@@ -2391,7 +2403,7 @@ gst_mxf_demux_handle_klv_packet (GstMXFDemux * demux, const MXFUL * key,
 
   if (demux->update_metadata
       && !mxf_timestamp_is_unknown (&demux->preface.last_modified_date)
-      && !mxf_is_metadata (key)
+      && !mxf_is_metadata (key) && !mxf_is_descriptive_metadata (key)
       && !mxf_is_fill (key)) {
     if ((ret =
             gst_mxf_demux_handle_header_metadata_resolve_references (demux)) !=

gst/mxf/mxfdv-dif.c

@@ -0,0 +1,122 @@
+/* GStreamer
+ * Copyright (C) 2008 Sebastian Dröge <sebastian.droege@collabora.co.uk>
+ *
+ * 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.
+ */
+
+/* Implementation of SMPTE 383M - Mapping DV-DIF data into the MXF
+ * Generic Container
+ */
+
+#ifdef HAVE_CONFIG_H
+#include "config.h"
+#endif
+
+#include <gst/gst.h>
+#include <string.h>
+
+#include "mxfdv-dif.h"
+
+GST_DEBUG_CATEGORY_EXTERN (mxf_debug);
+#define GST_CAT_DEFAULT mxf_debug
+
+gboolean
+mxf_is_dv_dif_essence_track (const MXFMetadataTrack * track)
+{
+  guint i;
+
+  g_return_val_if_fail (track != NULL, FALSE);
+
+  if (track->descriptor == NULL)
+    return FALSE;
+
+  for (i = 0; i < track->n_descriptor; i++) {
+    MXFMetadataFileDescriptor *d = track->descriptor[i];
+    MXFUL *key = &d->essence_container;
+    /* SMPTE 383M 8 */
+    if (mxf_is_generic_container_essence_container_label (key) &&
+        key->u[12] == 0x02 && key->u[13] == 0x02)
+      return TRUE;
+  }
+
+  return FALSE;
+}
+
+static GstFlowReturn
+mxf_dv_dif_handle_essence_element (const MXFUL * key, GstBuffer * buffer,
+    GstCaps * caps, MXFMetadataGenericPackage * package,
+    MXFMetadataTrack * track, MXFMetadataStructuralComponent * component,
+    gpointer mapping_data, GstBuffer ** outbuf)
+{
+  *outbuf = buffer;
+
+  /* SMPTE 383 6.1.1 */
+  if (key->u[12] != 0x18 || (key->u[14] != 0x01 && key->u[14] != 0x02)) {
+    GST_ERROR ("Invalid DV-DIF essence element");
+    return GST_FLOW_ERROR;
+  }
+
+  return GST_FLOW_OK;
+}
+
+
+GstCaps *
+mxf_dv_dif_create_caps (MXFMetadataGenericPackage * package,
+    MXFMetadataTrack * track, GstTagList ** tags,
+    MXFEssenceElementHandler * handler, gpointer * mapping_data)
+{
+  MXFMetadataFileDescriptor *f = NULL;
+  guint i;
+  GstCaps *caps = NULL;
+
+  g_return_val_if_fail (package != NULL, NULL);
+  g_return_val_if_fail (track != NULL, NULL);
+
+  if (track->descriptor == NULL) {
+    GST_ERROR ("No descriptor found for this track");
+    return NULL;
+  }
+
+  for (i = 0; i < track->n_descriptor; i++) {
+    if (((MXFMetadataGenericDescriptor *) track->descriptor[i])->
+        is_file_descriptor
+        && ((MXFMetadataGenericDescriptor *) track->descriptor[i])->type !=
+        MXF_METADATA_MULTIPLE_DESCRIPTOR) {
+      f = track->descriptor[i];
+    }
+  }
+
+  if (!f) {
+    GST_ERROR ("No descriptor found for this track");
+    return NULL;
+  }
+
+  *handler = mxf_dv_dif_handle_essence_element;
+  /* SMPTE 383M 8 */
+
+  /* TODO: might be video or audio only, use values of the generic sound/picture
+   * descriptor in the caps in that case
+   * Also dvdemux might not forward timestamps
+   */
+  if (f->essence_container.u[13] == 0x02) {
+    GST_DEBUG ("Found DV-DIF stream");
+    caps =
+        gst_caps_new_simple ("video/x-dv", "systemstream", G_TYPE_BOOLEAN, TRUE,
+        NULL);
+  }
+
+  return caps;
+}

gst/mxf/mxfdv-dif.h

@@ -0,0 +1,36 @@
+/* GStreamer
+ * Copyright (C) 2008 Sebastian Dröge <sebastian.droege@collabora.co.uk>
+ *
+ * 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.
+ */
+
+/* Implementation of SMPTE 383M - Mapping DV-DIF data into the MXF
+ * Generic Container
+ */
+
+#ifndef __MXF_DV_DIF_H__
+#define __MXF_DV_DIF_H__
+
+#include <gst/gst.h>
+
+#include "mxfparse.h"
+
+gboolean mxf_is_dv_dif_essence_track (const MXFMetadataTrack *track);
+
+GstCaps *
+mxf_dv_dif_create_caps (MXFMetadataGenericPackage *package, MXFMetadataTrack *track, GstTagList **tags, MXFEssenceElementHandler *handler, gpointer *mapping_data);
+
+#endif /* __MXF_DV_DIF_H__ */

gst/mxf/mxfparse.c

@@ -141,6 +141,18 @@ mxf_is_metadata (const MXFUL * key)
   return (memcmp (key, metadata_key, 13) == 0 && key->u[15] == 0x00);
 }
 
+/* SMPTE 377M 8.7.3 */
+gboolean
+mxf_is_descriptive_metadata (const MXFUL * key)
+{
+  return (memcmp (key, mxf_key, 4) == 0 &&
+      key->u[4] == 0x02 &&
+      key->u[6] == 0x01 &&
+      key->u[7] == 0x01 &&
+      key->u[8] == 0x0d &&
+      key->u[9] == 0x01 && key->u[10] == 0x04 && key->u[11] == 0x01);
+}
+
 gboolean
 mxf_is_random_index_pack (const MXFUL * key)
 {

gst/mxf/mxfparse.h

@@ -48,6 +48,7 @@ gboolean mxf_is_footer_partition_pack (const MXFUL *key);
 gboolean mxf_is_primer_pack (const MXFUL *key);
 
 gboolean mxf_is_metadata (const MXFUL *key);
+gboolean mxf_is_descriptive_metadata (const MXFUL *key);
 
 gboolean mxf_is_random_index_pack (const MXFUL *key);
 gboolean mxf_is_index_table_segment (const MXFUL *key);