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/* 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 422M - Mapping JPEG2000 codestreams into the MXF
* Generic Container
*/
/* TODO:
* - parse the jpeg2000 sub-descriptor, see SMPTE 422M 7.2
* - Add support for XYZ colorspace
*/
#ifdef HAVE_CONFIG_H
#include "config.h"
#endif
#include <gst/gst.h>
#include <string.h>
#include "mxfjpeg2000.h"
GST_DEBUG_CATEGORY_EXTERN (mxf_debug);
#define GST_CAT_DEFAULT mxf_debug
static gboolean
mxf_is_jpeg2000_essence_track (const MXFMetadataTimelineTrack * track)
{
guint i;
g_return_val_if_fail (track != NULL, FALSE);
if (track->parent.descriptor == NULL)
return FALSE;
for (i = 0; i < track->parent.n_descriptor; i++) {
MXFMetadataFileDescriptor *d = track->parent.descriptor[i];
MXFUL *key;
if (!d)
continue;
key = &d->essence_container;
/* SMPTE 422M 5.4 */
if (mxf_is_generic_container_essence_container_label (key) &&
key->u[12] == 0x02 && key->u[13] == 0x0c &&
(key->u[14] == 0x01 || key->u[14] == 0x02))
return TRUE;
}
return FALSE;
}
static GstFlowReturn
mxf_jpeg2000_handle_essence_element (const MXFUL * key, GstBuffer * buffer,
GstCaps * caps,
MXFMetadataTimelineTrack * track,
MXFMetadataStructuralComponent * component, gpointer mapping_data,
GstBuffer ** outbuf)
{
*outbuf = buffer;
/* SMPTE 422M 5.1 */
if (key->u[12] != 0x15 || (key->u[14] != 0x08 && key->u[14] != 0x09)) {
GST_ERROR ("Invalid JPEG2000 essence element");
return GST_FLOW_ERROR;
}
return GST_FLOW_OK;
}
static GstCaps *
mxf_jpeg2000_create_caps (MXFMetadataTimelineTrack * track, GstTagList ** tags,
MXFEssenceElementHandleFunc * handler, gpointer * mapping_data)
{
MXFMetadataFileDescriptor *f = NULL;
MXFMetadataGenericPictureEssenceDescriptor *p = NULL;
guint i;
GstCaps *caps = NULL;
guint32 fourcc;
g_return_val_if_fail (track != NULL, NULL);
if (track->parent.descriptor == NULL) {
GST_ERROR ("No descriptor found for this track");
return NULL;
}
for (i = 0; i < track->parent.n_descriptor; i++) {
if (!track->parent.descriptor[i])
continue;
if (MXF_IS_METADATA_GENERIC_PICTURE_ESSENCE_DESCRIPTOR (track->
parent.descriptor[i])) {
p = (MXFMetadataGenericPictureEssenceDescriptor *) track->parent.
descriptor[i];
f = track->parent.descriptor[i];
break;
} else if (MXF_IS_METADATA_FILE_DESCRIPTOR (track->parent.descriptor[i]) &&
!MXF_IS_METADATA_MULTIPLE_DESCRIPTOR (track->parent.descriptor[i])) {
f = track->parent.descriptor[i];
}
}
if (!f) {
GST_ERROR ("No descriptor found for this track");
return NULL;
}
fourcc = GST_MAKE_FOURCC ('s', 'R', 'G', 'B');
if (p && MXF_IS_METADATA_CDCI_PICTURE_ESSENCE_DESCRIPTOR (p)) {
fourcc = GST_MAKE_FOURCC ('s', 'Y', 'U', 'V');
} else if (p && MXF_IS_METADATA_RGBA_PICTURE_ESSENCE_DESCRIPTOR (p)) {
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? */
caps =
gst_caps_new_simple ("image/x-jpc", "fields", G_TYPE_INT, 1, "fourcc",
GST_TYPE_FOURCC, fourcc, NULL);
if (p) {
mxf_metadata_generic_picture_essence_descriptor_set_caps (p, caps);
} else {
GST_WARNING ("Only a generic file descriptor found");
}
if (!*tags)
*tags = gst_tag_list_new ();
gst_tag_list_add (*tags, GST_TAG_MERGE_APPEND, GST_TAG_VIDEO_CODEC,
"JPEG 2000", NULL);
return caps;
}
static const MXFEssenceElementHandler mxf_jpeg2000_essence_element_handler = {
mxf_is_jpeg2000_essence_track,
mxf_jpeg2000_create_caps
};
void
mxf_jpeg2000_init (void)
{
mxf_essence_element_handler_register (&mxf_jpeg2000_essence_element_handler);
}
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