gst/mxf/mxfjpeg2000.c: Implement detection of the colorspace used by the

Original commit message from CVS:
* gst/mxf/mxfjpeg2000.c: (mxf_jpeg2000_create_caps):
Implement detection of the colorspace used by the
JPEG2000 codestream. XYZ colorspace isn't supported by
our decoders yet unfortunately.

2 files changed, 70 insertions, 4 deletions

diff --git a/ChangeLog b/ChangeLog
index 3c62fe74..012eb20a 100644
--- a/ChangeLog
+++ b/ChangeLog
@@ -1,3 +1,10 @@
+2008-12-09  Sebastian Dröge  <sebastian.droege@collabora.co.uk>
+
+	* gst/mxf/mxfjpeg2000.c: (mxf_jpeg2000_create_caps):
+	Implement detection of the colorspace used by the
+	JPEG2000 codestream. XYZ colorspace isn't supported by
+	our decoders yet unfortunately.
+
 2008-12-08  Sebastian Dröge  <sebastian.droege@collabora.co.uk>
 
 	* gst/mxf/mxfparse.c:
diff --git a/gst/mxf/mxfjpeg2000.c b/gst/mxf/mxfjpeg2000.c
index ae627dc4..c9e78fa9 100644
--- a/gst/mxf/mxfjpeg2000.c
+++ b/gst/mxf/mxfjpeg2000.c
@@ -87,6 +87,7 @@ mxf_jpeg2000_create_caps (MXFMetadataGenericPackage * package,
   MXFMetadataGenericPictureEssenceDescriptor *p = NULL;
   guint i;
   GstCaps *caps = NULL;
+  guint32 fourcc;
 
   g_return_val_if_fail (package != NULL, NULL);
   g_return_val_if_fail (track != NULL, NULL);
@@ -106,8 +107,8 @@ mxf_jpeg2000_create_caps (MXFMetadataGenericPackage * package,
       p = (MXFMetadataGenericPictureEssenceDescriptor *) track->descriptor[i];
       f = track->descriptor[i];
       break;
-    } else if (((MXFMetadataGenericDescriptor *) track->descriptor[i])->
-        is_file_descriptor
+    } else if (((MXFMetadataGenericDescriptor *) track->
+            descriptor[i])->is_file_descriptor
         && ((MXFMetadataGenericDescriptor *) track->descriptor[i])->type !=
         MXF_METADATA_MULTIPLE_DESCRIPTOR) {
       f = track->descriptor[i];
@@ -119,13 +120,71 @@ mxf_jpeg2000_create_caps (MXFMetadataGenericPackage * package,
     return NULL;
   }
 
+  fourcc = GST_MAKE_FOURCC ('s', 'R', 'G', 'B');
+  if (p
+      && ((MXFMetadataGenericDescriptor *) p)->type ==
+      MXF_METADATA_CDCI_PICTURE_ESSENCE_DESCRIPTOR) {
+    fourcc = GST_MAKE_FOURCC ('s', 'Y', 'U', 'V');
+  } else if (p
+      && ((MXFMetadataGenericDescriptor *) p)->type ==
+      MXF_METADATA_CDCI_PICTURE_ESSENCE_DESCRIPTOR) {
+    MXFMetadataRGBAPictureEssenceDescriptor *r =
+        (MXFMetadataRGBAPictureEssenceDescriptor *) p;
+    gboolean rgb = TRUE;
+    gboolean xyz = TRUE;
+    gboolean yuv = TRUE;
+    guint i;
+
+    if (r->pixel_layout) {
+      for (i = 0; i < r->n_pixel_layout; i++) {
+        guint8 c = r->pixel_layout[2 * i];
+
+        switch (c) {
+          case 'R':
+          case 'r':
+          case 'G':
+          case 'g':
+          case 'B':
+          case 'b':
+            xyz = yuv = FALSE;
+            break;
+          case 'Y':
+          case 'y':
+            rgb = FALSE;
+            break;
+          case 'U':
+          case 'u':
+          case 'V':
+          case 'v':
+            xyz = rgb = FALSE;
+            break;
+          case 'X':
+          case 'x':
+          case 'Z':
+          case 'z':
+            rgb = yuv = FALSE;
+            break;
+          default:
+            break;
+        }
+      }
+      if (rgb) {
+        fourcc = GST_MAKE_FOURCC ('s', 'R', 'G', 'B');
+      } else if (yuv) {
+        fourcc = GST_MAKE_FOURCC ('s', 'Y', 'U', 'V');
+      } else if (xyz) {
+        GST_ERROR ("JPEG2000 with XYZ colorspace not supported yet");
+        return NULL;
+      }
+    }
+  }
+
   *handler = mxf_jpeg2000_handle_essence_element;
 
   /* TODO: What about other field values? */
-  /* FIXME: For now assume sRGB but get the correct value from the descriptor */
   caps =
       gst_caps_new_simple ("image/x-jpc", "fields", G_TYPE_INT, 1, "fourcc",
-      GST_TYPE_FOURCC, GST_MAKE_FOURCC ('s', 'R', 'G', 'B'), NULL);
+      GST_TYPE_FOURCC, fourcc, NULL);
   if (p) {
     mxf_metadata_generic_picture_essence_descriptor_set_caps (p, caps);
   } else {