mirror of
https://gitlab.freedesktop.org/gstreamer/gstreamer.git
synced 2024-09-09 05:38:58 +00:00
149 lines
3.9 KiB
C
149 lines
3.9 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., 59 Temple Place - Suite 330,
|
|
* Boston, MA 02111-1307, USA.
|
|
*/
|
|
|
|
/* Implementation of SMPTE 383M - Mapping DV-DIF data into the MXF
|
|
* Generic Container
|
|
*/
|
|
|
|
/* TODO:
|
|
* - playbin hangs on a lot of MXF/DV-DIF files (bug #563827)
|
|
* - decodebin2 creates loops inside the linking graph (bug #563828)
|
|
* - Forwarding of timestamps in dvdemux?
|
|
*/
|
|
|
|
#ifdef HAVE_CONFIG_H
|
|
#include "config.h"
|
|
#endif
|
|
|
|
#include <gst/gst.h>
|
|
#include <string.h>
|
|
|
|
#include "mxfdv-dif.h"
|
|
|
|
GST_DEBUG_CATEGORY_EXTERN (mxf_debug);
|
|
#define GST_CAT_DEFAULT mxf_debug
|
|
|
|
static gboolean
|
|
mxf_is_dv_dif_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 383M 8 */
|
|
if (mxf_is_generic_container_essence_container_label (key) &&
|
|
key->u[12] == 0x02 && key->u[13] == 0x02)
|
|
return TRUE;
|
|
}
|
|
|
|
return FALSE;
|
|
}
|
|
|
|
static GstFlowReturn
|
|
mxf_dv_dif_handle_essence_element (const MXFUL * key, GstBuffer * buffer,
|
|
GstCaps * caps,
|
|
MXFMetadataTimelineTrack * track,
|
|
MXFMetadataSourceClip * component, gpointer mapping_data,
|
|
GstBuffer ** outbuf)
|
|
{
|
|
*outbuf = buffer;
|
|
|
|
/* SMPTE 383 6.1.1 */
|
|
if (key->u[12] != 0x18 || (key->u[14] != 0x01 && key->u[14] != 0x02)) {
|
|
GST_ERROR ("Invalid DV-DIF essence element");
|
|
return GST_FLOW_ERROR;
|
|
}
|
|
|
|
return GST_FLOW_OK;
|
|
}
|
|
|
|
|
|
static GstCaps *
|
|
mxf_dv_dif_create_caps (MXFMetadataTimelineTrack * track, GstTagList ** tags,
|
|
MXFEssenceElementHandleFunc * handler, gpointer * mapping_data)
|
|
{
|
|
MXFMetadataFileDescriptor *f = 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_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_dv_dif_handle_essence_element;
|
|
/* SMPTE 383M 8 */
|
|
|
|
/* TODO: might be video or audio only, use values of the generic sound/picture
|
|
* descriptor in the caps in that case
|
|
*/
|
|
if (f->essence_container.u[13] == 0x02) {
|
|
GST_DEBUG ("Found DV-DIF stream");
|
|
caps =
|
|
gst_caps_new_simple ("video/x-dv", "systemstream", G_TYPE_BOOLEAN, TRUE,
|
|
NULL);
|
|
|
|
if (!*tags)
|
|
*tags = gst_tag_list_new ();
|
|
|
|
gst_tag_list_add (*tags, GST_TAG_MERGE_APPEND, GST_TAG_CODEC, "DV-DIF",
|
|
NULL);
|
|
}
|
|
|
|
return caps;
|
|
}
|
|
|
|
static const MXFEssenceElementHandler mxf_dv_dif_essence_element_handler = {
|
|
mxf_is_dv_dif_essence_track,
|
|
mxf_dv_dif_create_caps
|
|
};
|
|
|
|
void
|
|
mxf_dv_dif_init (void)
|
|
{
|
|
mxf_essence_element_handler_register (&mxf_dv_dif_essence_element_handler);
|
|
}
|