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gstreamer/gst/mxf/mxfup.c
Sebastian Dröge 91b35975b5 Generate an index table for essence streams 
Generate an index table for essence streams during playback
and make sure that only the correct essence elements are
used for played tracks.

Make it possible to have one essence stream used in multiple
playback tracks.

Fix some minor bugs.
2009-01-31 11:02:24 +01:00

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/* GStreamer
* Copyright (C) 2008-2009 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 384M - Mapping of Uncompressed Pictures into the MXF
* Generic Container
*/
/* TODO:
* - Handle CDCI essence
* - Handle more formats with RGBA descriptor (4:4:4 / 4:4:4:4 YUV, RGB656, ...)
* - Correctly transform for the GStreamer strides
* - Handle all the dimensions and other properties in the picture
* essence descriptors correctly according to S377M Annex E
*/
#ifdef HAVE_CONFIG_H
#include "config.h"
#endif
#include <gst/gst.h>
#include <string.h>
#include <gst/video/video.h>
#include "mxfup.h"
GST_DEBUG_CATEGORY_EXTERN (mxf_debug);
#define GST_CAT_DEFAULT mxf_debug
typedef struct
{
guint32 image_start_offset;
guint32 image_end_offset;
} MXFUPMappingData;
static gboolean
mxf_is_up_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 384M 8 */
if (mxf_is_generic_container_essence_container_label (key) &&
key->u[12] == 0x02 && key->u[13] == 0x05 && key->u[15] <= 0x03)
return TRUE;
}
return FALSE;
}
static GstFlowReturn
mxf_up_handle_essence_element (const MXFUL * key, GstBuffer * buffer,
GstCaps * caps,
MXFMetadataTimelineTrack * track,
gpointer mapping_data, GstBuffer ** outbuf)
{
MXFUPMappingData *data = mapping_data;
/* SMPTE 384M 7.1 */
if (key->u[12] != 0x15 || (key->u[14] != 0x01 && key->u[14] != 0x02
&& key->u[14] != 0x03 && key->u[14] != 0x04)) {
GST_ERROR ("Invalid uncompressed picture essence element");
return GST_FLOW_ERROR;
}
if (!data || (data->image_start_offset == 0 && data->image_end_offset == 0)) {
*outbuf = buffer;
} else {
if (data->image_start_offset + data->image_end_offset
> GST_BUFFER_SIZE (buffer)) {
gst_buffer_unref (buffer);
GST_ERROR ("Invalid buffer size");
return GST_FLOW_ERROR;
} else {
GST_BUFFER_DATA (buffer) += data->image_start_offset;
GST_BUFFER_SIZE (buffer) -= data->image_start_offset;
GST_BUFFER_SIZE (buffer) -= data->image_end_offset;
*outbuf = buffer;
}
}
return GST_FLOW_OK;
}
static GstCaps *
mxf_up_rgba_create_caps (MXFMetadataTimelineTrack * track,
MXFMetadataRGBAPictureEssenceDescriptor * d, GstTagList ** tags,
MXFEssenceElementHandleFunc * handler, gpointer * mapping_data)
{
GstCaps *caps = NULL;
if (!d->pixel_layout) {
GST_ERROR ("No pixel layout");
return NULL;
}
if (d->n_pixel_layout == 3) {
if (d->pixel_layout[0] == 'R' && d->pixel_layout[2] == 'G'
&& d->pixel_layout[4] == 'B' && d->pixel_layout[1] == 8
&& d->pixel_layout[3] == 8 && d->pixel_layout[5] == 8) {
caps = gst_caps_from_string (GST_VIDEO_CAPS_RGB);
} else if (d->pixel_layout[0] == 'B' && d->pixel_layout[2] == 'G'
&& d->pixel_layout[4] == 'R' && d->pixel_layout[1] == 8
&& d->pixel_layout[3] == 8 && d->pixel_layout[5] == 8) {
caps = gst_caps_from_string (GST_VIDEO_CAPS_BGR);
} else {
GST_ERROR ("Unsupport 3 component pixel layout");
return NULL;
}
} else if (d->n_pixel_layout == 4) {
if (d->pixel_layout[0] == 'R' && d->pixel_layout[2] == 'G'
&& d->pixel_layout[4] == 'B' && d->pixel_layout[6] == 'F'
&& d->pixel_layout[1] == 8 && d->pixel_layout[3] == 8
&& d->pixel_layout[5] == 8 && d->pixel_layout[7] == 8) {
caps = gst_caps_from_string (GST_VIDEO_CAPS_RGBx);
} else if (d->pixel_layout[0] == 'B' && d->pixel_layout[2] == 'G'
&& d->pixel_layout[4] == 'R' && d->pixel_layout[6] == 'F'
&& d->pixel_layout[1] == 8 && d->pixel_layout[3] == 8
&& d->pixel_layout[5] == 8 && d->pixel_layout[7] == 8) {
caps = gst_caps_from_string (GST_VIDEO_CAPS_BGRx);
} else if (d->pixel_layout[0] == 'F' && d->pixel_layout[2] == 'R'
&& d->pixel_layout[4] == 'G' && d->pixel_layout[6] == 'B'
&& d->pixel_layout[1] == 8 && d->pixel_layout[3] == 8
&& d->pixel_layout[5] == 8 && d->pixel_layout[7] == 8) {
caps = gst_caps_from_string (GST_VIDEO_CAPS_xRGB);
} else if (d->pixel_layout[0] == 'F' && d->pixel_layout[2] == 'B'
&& d->pixel_layout[4] == 'G' && d->pixel_layout[6] == 'R'
&& d->pixel_layout[1] == 8 && d->pixel_layout[3] == 8
&& d->pixel_layout[5] == 8 && d->pixel_layout[7] == 8) {
caps = gst_caps_from_string (GST_VIDEO_CAPS_xBGR);
} else if (d->pixel_layout[0] == 'A' && d->pixel_layout[2] == 'R'
&& d->pixel_layout[4] == 'G' && d->pixel_layout[6] == 'B'
&& d->pixel_layout[1] == 8 && d->pixel_layout[3] == 8
&& d->pixel_layout[5] == 8 && d->pixel_layout[7] == 8) {
caps = gst_caps_from_string (GST_VIDEO_CAPS_ARGB);
} else if (d->pixel_layout[0] == 'A' && d->pixel_layout[2] == 'B'
&& d->pixel_layout[4] == 'G' && d->pixel_layout[6] == 'R'
&& d->pixel_layout[1] == 8 && d->pixel_layout[3] == 8
&& d->pixel_layout[5] == 8 && d->pixel_layout[7] == 8) {
caps = gst_caps_from_string (GST_VIDEO_CAPS_ABGR);
} else if (d->pixel_layout[0] == 'R' && d->pixel_layout[2] == 'G'
&& d->pixel_layout[4] == 'B' && d->pixel_layout[6] == 'A'
&& d->pixel_layout[1] == 8 && d->pixel_layout[3] == 8
&& d->pixel_layout[5] == 8 && d->pixel_layout[7] == 8) {
caps = gst_caps_from_string (GST_VIDEO_CAPS_RGBA);
} else if (d->pixel_layout[0] == 'B' && d->pixel_layout[2] == 'G'
&& d->pixel_layout[4] == 'R' && d->pixel_layout[6] == 'A'
&& d->pixel_layout[1] == 8 && d->pixel_layout[3] == 8
&& d->pixel_layout[5] == 8 && d->pixel_layout[7] == 8) {
caps = gst_caps_from_string (GST_VIDEO_CAPS_BGRA);
} else {
GST_ERROR ("Unsupport 4 component pixel layout");
return NULL;
}
} else {
GST_ERROR ("Pixel layouts with %u components not supported yet",
d->n_pixel_layout);
return NULL;
}
if (caps) {
MXFUPMappingData *data = g_new0 (MXFUPMappingData, 1);
data->image_start_offset =
((MXFMetadataGenericPictureEssenceDescriptor *) d)->image_start_offset;
data->image_end_offset =
((MXFMetadataGenericPictureEssenceDescriptor *) d)->image_end_offset;
*mapping_data = data;
}
return caps;
}
static GstCaps *
mxf_up_create_caps (MXFMetadataTimelineTrack * track, GstTagList ** tags,
MXFEssenceElementHandleFunc * handler, gpointer * mapping_data)
{
MXFMetadataGenericPictureEssenceDescriptor *p = NULL;
MXFMetadataCDCIPictureEssenceDescriptor *c = NULL;
MXFMetadataRGBAPictureEssenceDescriptor *r = NULL;
guint i;
GstCaps *caps = NULL;
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_RGBA_PICTURE_ESSENCE_DESCRIPTOR (track->
parent.descriptor[i])) {
p = (MXFMetadataGenericPictureEssenceDescriptor *) track->
parent.descriptor[i];
r = (MXFMetadataRGBAPictureEssenceDescriptor *) track->
parent.descriptor[i];
break;
} else if (MXF_IS_METADATA_CDCI_PICTURE_ESSENCE_DESCRIPTOR (track->parent.
descriptor[i])) {
p = (MXFMetadataGenericPictureEssenceDescriptor *) track->
parent.descriptor[i];
c = (MXFMetadataCDCIPictureEssenceDescriptor *) track->
parent.descriptor[i];
}
}
if (!p) {
GST_ERROR ("No picture essence descriptor found for this track");
return NULL;
}
*handler = mxf_up_handle_essence_element;
if (r) {
caps = mxf_up_rgba_create_caps (track, r, tags, handler, mapping_data);
} else {
GST_ERROR ("CDCI uncompressed picture essence not supported yet");
return NULL;
}
if (caps) {
mxf_metadata_generic_picture_essence_descriptor_set_caps (p, caps);
}
return caps;
}
static const MXFEssenceElementHandler mxf_up_essence_element_handler = {
mxf_is_up_essence_track,
mxf_up_create_caps
};
void
mxf_up_init (void)
{
mxf_essence_element_handler_register (&mxf_up_essence_element_handler);
}
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