gstreamer/gst/mxf/mxfdv-dif.c

276 lines
7.8 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 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)
* - track descriptor might be multiple descriptor, one for sound, one for video
* - there might be 2 tracks for one essence, i.e. one audio/one video track
*/
#ifdef HAVE_CONFIG_H
#include "config.h"
#endif
#include <gst/gst.h>
#include <gst/video/video.h>
#include <string.h>
#include "mxfdv-dif.h"
#include "mxfessence.h"
GST_DEBUG_CATEGORY_EXTERN (mxf_debug);
#define GST_CAT_DEFAULT mxf_debug
static const MXFUL picture_essence_coding_dv = { {
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 (mxf_ul_is_subclass (&picture_essence_coding_dv, key))
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 MXFEssenceWrapping
mxf_dv_dif_get_track_wrapping (const MXFMetadataTimelineTrack * track)
{
guint i;
g_return_val_if_fail (track != NULL, MXF_ESSENCE_WRAPPING_CUSTOM_WRAPPING);
if (track->parent.descriptor == NULL) {
GST_ERROR ("No descriptor found for this track");
return MXF_ESSENCE_WRAPPING_CUSTOM_WRAPPING;
}
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]))
continue;
switch (track->parent.descriptor[i]->essence_container.u[15]) {
case 0x01:
return MXF_ESSENCE_WRAPPING_FRAME_WRAPPING;
break;
case 0x02:
return MXF_ESSENCE_WRAPPING_CLIP_WRAPPING;
break;
default:
return MXF_ESSENCE_WRAPPING_CUSTOM_WRAPPING;
break;
}
}
return MXF_ESSENCE_WRAPPING_CUSTOM_WRAPPING;
}
static GstCaps *
mxf_dv_dif_create_caps (MXFMetadataTimelineTrack * track, GstTagList ** tags,
MXFEssenceElementHandleFunc * handler, gpointer * mapping_data)
{
GstCaps *caps = NULL;
guint i;
MXFMetadataGenericPictureEssenceDescriptor *d = 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 (MXF_IS_METADATA_GENERIC_PICTURE_ESSENCE_DESCRIPTOR (track->
parent.descriptor[i])) {
d = MXF_METADATA_GENERIC_PICTURE_ESSENCE_DESCRIPTOR (track->
parent.descriptor[i]);
break;
}
}
*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 (d)
mxf_metadata_generic_picture_essence_descriptor_set_caps (d, caps);
if (!*tags)
*tags = gst_tag_list_new_empty ();
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_get_track_wrapping,
mxf_dv_dif_create_caps
};
static GstFlowReturn
mxf_dv_dif_write_func (GstBuffer * buffer,
gpointer mapping_data, GstAdapter * adapter, GstBuffer ** outbuf,
gboolean flush)
{
*outbuf = buffer;
return GST_FLOW_OK;
}
static const guint8 dv_dif_essence_container_ul[] = {
0x06, 0x0e, 0x2b, 0x34, 0x04, 0x01, 0x01, 0x01,
0x0d, 0x01, 0x03, 0x01, 0x02, 0x02, 0x7f, 0x01
};
static MXFMetadataFileDescriptor *
mxf_dv_dif_get_descriptor (GstPadTemplate * tmpl, GstCaps * caps,
MXFEssenceElementWriteFunc * handler, gpointer * mapping_data)
{
MXFMetadataCDCIPictureEssenceDescriptor *ret;
ret = (MXFMetadataCDCIPictureEssenceDescriptor *)
g_object_new (MXF_TYPE_METADATA_CDCI_PICTURE_ESSENCE_DESCRIPTOR, NULL);
memcpy (&ret->parent.parent.essence_container, &dv_dif_essence_container_ul,
16);
if (!mxf_metadata_generic_picture_essence_descriptor_from_caps (&ret->parent,
caps)) {
g_object_unref (ret);
return NULL;
}
*handler = mxf_dv_dif_write_func;
return (MXFMetadataFileDescriptor *) ret;
}
static void
mxf_dv_dif_update_descriptor (MXFMetadataFileDescriptor * d, GstCaps * caps,
gpointer mapping_data, GstBuffer * buf)
{
return;
}
static void
mxf_dv_dif_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_dv_dif_get_track_number_template (MXFMetadataFileDescriptor * a,
GstCaps * caps, gpointer mapping_data)
{
return (0x18 << 24) | (0x01 << 8);
}
static MXFEssenceElementWriter mxf_dv_dif_essence_element_writer = {
mxf_dv_dif_get_descriptor,
mxf_dv_dif_update_descriptor,
mxf_dv_dif_get_edit_rate,
mxf_dv_dif_get_track_number_template,
NULL,
{{0,}}
};
void
mxf_dv_dif_init (void)
{
mxf_essence_element_handler_register (&mxf_dv_dif_essence_element_handler);
mxf_dv_dif_essence_element_writer.pad_template =
gst_pad_template_new ("dv_dif_video_sink_%u", GST_PAD_SINK,
GST_PAD_REQUEST,
gst_caps_from_string ("video/x-dv, width = "
GST_VIDEO_SIZE_RANGE ", height = " GST_VIDEO_SIZE_RANGE
", framerate = " GST_VIDEO_FPS_RANGE ", systemstream = true"));
memcpy (&mxf_dv_dif_essence_element_writer.data_definition,
mxf_metadata_track_identifier_get (MXF_METADATA_TRACK_PICTURE_ESSENCE),
16);
mxf_essence_element_writer_register (&mxf_dv_dif_essence_element_writer);
}