gstreamer/gst/mxf/mxfvc3.c
2012-11-04 00:09:59 +00:00

249 lines
7.1 KiB
C

/* 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., 51 Franklin St, Fifth Floor,
* Boston, MA 02110-1301, USA.
*/
/* Implementation of SMPTE S2019-4 - Mapping VC-3 coding units into the MXF
* Generic Container
*/
#ifdef HAVE_CONFIG_H
#include "config.h"
#endif
#include <gst/gst.h>
#include <gst/video/video.h>
#include <string.h>
#include "mxfvc3.h"
#include "mxfessence.h"
GST_DEBUG_CATEGORY_EXTERN (mxf_debug);
#define GST_CAT_DEFAULT mxf_debug
static const MXFUL picture_essence_coding_vc3_avid = { {
0x06, 0x0e, 0x2b, 0x34, 0x04, 0x01, 0x01, 0x01, 0x0e, 0x04, 0x02, 0x01,
0x02,
0x04, 0x01, 0x00}
};
static gboolean
mxf_is_vc3_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 S2019-4 7 */
if (mxf_is_generic_container_essence_container_label (key) &&
key->u[12] == 0x02 && key->u[13] == 0x11 &&
(key->u[14] == 0x01 || key->u[14] == 0x02)) {
return TRUE;
} else if (mxf_is_avid_essence_container_label (key)) {
MXFMetadataGenericPictureEssenceDescriptor *p;
if (!MXF_IS_METADATA_GENERIC_PICTURE_ESSENCE_DESCRIPTOR (d))
return FALSE;
p = MXF_METADATA_GENERIC_PICTURE_ESSENCE_DESCRIPTOR (d);
key = &p->picture_essence_coding;
if (mxf_ul_is_subclass (&picture_essence_coding_vc3_avid, key))
return TRUE;
}
}
return FALSE;
}
static GstFlowReturn
mxf_vc3_handle_essence_element (const MXFUL * key, GstBuffer * buffer,
GstCaps * caps,
MXFMetadataTimelineTrack * track,
gpointer mapping_data, GstBuffer ** outbuf)
{
*outbuf = buffer;
/* SMPTE 2019-4 6.1 */
if (key->u[12] != 0x15 || (key->u[14] != 0x05 && key->u[14] != 0x06)) {
GST_ERROR ("Invalid VC-3 essence element");
return GST_FLOW_ERROR;
}
return GST_FLOW_OK;
}
static GstCaps *
mxf_vc3_create_caps (MXFMetadataTimelineTrack * track, GstTagList ** tags,
MXFEssenceElementHandleFunc * handler, gpointer * mapping_data)
{
MXFMetadataFileDescriptor *f = NULL;
MXFMetadataGenericPictureEssenceDescriptor *p = 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_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;
}
*handler = mxf_vc3_handle_essence_element;
caps = gst_caps_new_empty_simple ("video/x-dnxhd");
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_empty ();
gst_tag_list_add (*tags, GST_TAG_MERGE_APPEND, GST_TAG_VIDEO_CODEC,
"VC-3 Video", NULL);
return caps;
}
static const MXFEssenceElementHandler mxf_vc3_essence_element_handler = {
mxf_is_vc3_essence_track,
mxf_vc3_create_caps
};
static GstFlowReturn
mxf_vc3_write_func (GstBuffer * buffer, gpointer mapping_data,
GstAdapter * adapter, GstBuffer ** outbuf, gboolean flush)
{
*outbuf = buffer;
return GST_FLOW_OK;
}
/* FIXME: In which version was this added? Byte 7, assuming version 10 */
static const guint8 vc3_essence_container_ul[] = {
0x06, 0x0e, 0x2b, 0x34, 0x04, 0x01, 0x01, 0x0A,
0x0d, 0x01, 0x03, 0x01, 0x02, 0x11, 0x01, 0x00
};
static MXFMetadataFileDescriptor *
mxf_vc3_get_descriptor (GstPadTemplate * tmpl, GstCaps * caps,
MXFEssenceElementWriteFunc * handler, gpointer * mapping_data)
{
MXFMetadataCDCIPictureEssenceDescriptor *ret;
GstStructure *s;
s = gst_caps_get_structure (caps, 0);
if (strcmp (gst_structure_get_name (s), "video/x-dnxhd") != 0) {
GST_ERROR ("Invalid caps %" GST_PTR_FORMAT, caps);
return NULL;
}
ret = (MXFMetadataCDCIPictureEssenceDescriptor *)
g_object_new (MXF_TYPE_METADATA_CDCI_PICTURE_ESSENCE_DESCRIPTOR, NULL);
memcpy (&ret->parent.parent.essence_container, &vc3_essence_container_ul, 16);
if (!mxf_metadata_generic_picture_essence_descriptor_from_caps (&ret->parent,
caps)) {
g_object_unref (ret);
return NULL;
}
*handler = mxf_vc3_write_func;
return (MXFMetadataFileDescriptor *) ret;
}
static void
mxf_vc3_update_descriptor (MXFMetadataFileDescriptor * d, GstCaps * caps,
gpointer mapping_data, GstBuffer * buf)
{
return;
}
static void
mxf_vc3_get_edit_rate (MXFMetadataFileDescriptor * a, GstCaps * caps,
gpointer mapping_data, GstBuffer * buf, MXFMetadataSourcePackage * package,
MXFMetadataTimelineTrack * track, MXFFraction * edit_rate)
{
edit_rate->n = a->sample_rate.n;
edit_rate->d = a->sample_rate.d;
}
static guint32
mxf_vc3_get_track_number_template (MXFMetadataFileDescriptor * a,
GstCaps * caps, gpointer mapping_data)
{
return (0x15 << 24) | (0x05 << 8);
}
static MXFEssenceElementWriter mxf_vc3_essence_element_writer = {
mxf_vc3_get_descriptor,
mxf_vc3_update_descriptor,
mxf_vc3_get_edit_rate,
mxf_vc3_get_track_number_template,
NULL,
{{0,}}
};
void
mxf_vc3_init (void)
{
mxf_essence_element_handler_register (&mxf_vc3_essence_element_handler);
mxf_vc3_essence_element_writer.pad_template =
gst_pad_template_new ("vc3_video_sink_%u", GST_PAD_SINK, GST_PAD_REQUEST,
gst_caps_from_string ("video/x-dnxhd, width = " GST_VIDEO_SIZE_RANGE
", height = " GST_VIDEO_SIZE_RANGE ", framerate = "
GST_VIDEO_FPS_RANGE));
memcpy (&mxf_vc3_essence_element_writer.data_definition,
mxf_metadata_track_identifier_get (MXF_METADATA_TRACK_PICTURE_ESSENCE),
16);
mxf_essence_element_writer_register (&mxf_vc3_essence_element_writer);
}