From abcc8554971b964ee697a158043afe213798af71 Mon Sep 17 00:00:00 2001
From: =?UTF-8?q?Sebastian=20Dr=C3=B6ge?= <slomo@circular-chaos.org>
Date: Sun, 7 Dec 2008 17:16:29 +0000
Subject: gst/mxf/: Add initial support for uncompressed video essence (SMPTE
 S384M).

Original commit message from CVS:
* gst/mxf/Makefile.am:
* gst/mxf/mxfdemux.c:
(gst_mxf_demux_handle_header_metadata_update_streams):
* gst/mxf/mxftypes.h:
* gst/mxf/mxfup.c: (mxf_is_up_essence_track),
(mxf_up_handle_essence_element), (mxf_up_rgba_create_caps),
(mxf_up_create_caps):
* gst/mxf/mxfup.h:
Add initial support for uncompressed video essence (SMPTE S384M).
* gst/mxf/mxfparse.c:
(mxf_metadata_rgba_picture_essence_descriptor_handle_tag),
(mxf_metadata_rgba_picture_essence_descriptor_reset):
Fix parsing of the RGBA descriptor and add support for parsing
the pixel layout.
---
 gst/mxf/mxfparse.c | 38 +++++++++++++++++++++++++++++++++++++-
 1 file changed, 37 insertions(+), 1 deletion(-)

(limited to 'gst/mxf/mxfparse.c')

diff --git a/gst/mxf/mxfparse.c b/gst/mxf/mxfparse.c
index 212c6942..e2ff891e 100644
--- a/gst/mxf/mxfparse.c
+++ b/gst/mxf/mxfparse.c
@@ -2774,36 +2774,70 @@ gboolean
         goto error;
       descriptor->component_max_ref = GST_READ_UINT32_BE (tag_data);
       GST_DEBUG ("  component max ref = %u", descriptor->component_max_ref);
+      ret = TRUE;
       break;
     case 0x3407:
       if (tag_size != 4)
         goto error;
       descriptor->component_min_ref = GST_READ_UINT32_BE (tag_data);
       GST_DEBUG ("  component min ref = %u", descriptor->component_min_ref);
+      ret = TRUE;
       break;
     case 0x3408:
       if (tag_size != 4)
         goto error;
       descriptor->alpha_max_ref = GST_READ_UINT32_BE (tag_data);
       GST_DEBUG ("  alpha max ref = %u", descriptor->alpha_max_ref);
+      ret = TRUE;
       break;
     case 0x3409:
       if (tag_size != 4)
         goto error;
       descriptor->alpha_min_ref = GST_READ_UINT32_BE (tag_data);
       GST_DEBUG ("  alpha min ref = %u", descriptor->alpha_min_ref);
+      ret = TRUE;
       break;
     case 0x3405:
       if (tag_size != 1)
         goto error;
       descriptor->scanning_direction = GST_READ_UINT8 (tag_data);
       GST_DEBUG ("  scanning direction = %u", descriptor->scanning_direction);
+      ret = TRUE;
       break;
-    case 0x3401:
+    case 0x3401:{
+      guint i, len;
+
+      if (tag_size % 2 != 0)
+        goto error;
+
+      i = 0;
+      while (tag_data[i] != 0 && tag_data[i + 1] != 0 && i + 2 <= tag_size)
+        i += 2;
+      len = i / 2;
+
+      descriptor->n_pixel_layout = len;
+      GST_DEBUG ("  number of pixel layouts = %u", len);
+      if (len == 0)
+        return TRUE;
+
+      descriptor->pixel_layout = g_malloc0 (2 * len);
+
+      for (i = 0; i < len; i++) {
+        descriptor->pixel_layout[2 * i] = tag_data[2 * i];
+        descriptor->pixel_layout[2 * i + 1] = tag_data[2 * i + 1];
+        GST_DEBUG ("    pixel layout %u = %c : %u", i,
+            (gchar) descriptor->pixel_layout[2 * i],
+            descriptor->pixel_layout[2 * i + 1]);
+      }
+
+      ret = TRUE;
+      break;
+    }
     case 0x3403:
     case 0x3404:
       /* TODO: handle this */
       GST_WARNING ("  tag 0x%04x not implemented yet", tag);
+      ret = TRUE;
       break;
     default:
       ret =
@@ -2829,6 +2863,8 @@ void mxf_metadata_rgba_picture_essence_descriptor_reset
   mxf_metadata_generic_picture_essence_descriptor_reset (
       (MXFMetadataGenericPictureEssenceDescriptor *) descriptor);
 
+  g_free (descriptor->pixel_layout);
+
   MXF_METADATA_DESCRIPTOR_CLEAR (descriptor,
       MXFMetadataRGBAPictureEssenceDescriptor,
       MXFMetadataGenericPictureEssenceDescriptor);
-- 
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