mirror of
https://gitlab.freedesktop.org/gstreamer/gstreamer.git
synced 2024-09-09 05:38:58 +00:00
6e392318c0
Avid usually uses a custom essence container label for the essence descriptors and stores the actual codec that is used inside the picture essence coding field (and for sound probably in the sound essence coding field but I have no sample files with sound). Partially fixes bug #561922.
143 lines
3.9 KiB
C
143 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 const guint8 picture_essence_coding_dv[13] = {
|
|
0x06, 0x0e, 0x2b, 0x34, 0x04, 0x01, 0x01, 0x01, 0x04, 0x01, 0x02, 0x02, 0x02
|
|
};
|
|
|
|
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;
|
|
} 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 (memcmp (key, &picture_essence_coding_dv, 13) == 0)
|
|
return TRUE;
|
|
}
|
|
}
|
|
|
|
return FALSE;
|
|
}
|
|
|
|
static GstFlowReturn
|
|
mxf_dv_dif_handle_essence_element (const MXFUL * key, GstBuffer * buffer,
|
|
GstCaps * caps,
|
|
MXFMetadataTimelineTrack * track,
|
|
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)
|
|
{
|
|
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;
|
|
}
|
|
|
|
*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
|
|
*/
|
|
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);
|
|
}
|