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mxfdemux: Add support for non-standard Avid MXF files containing DV essence

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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.
This commit is contained in:
Sebastian Dröge 2009-02-07 09:27:13 +01:00
parent 1822dc99d3
commit 6e392318c0
3 changed files with 36 additions and 28 deletions
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51
gst/mxf/mxfdv-dif.c
View file

@ -39,6 +39,10 @@
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)
{
@ -59,8 +63,19 @@ mxf_is_dv_dif_essence_track (const MXFMetadataTimelineTrack * track)
key = &d->essence_container;
/* SMPTE 383M 8 */
if (mxf_is_generic_container_essence_container_label (key) &&
key->u[12] == 0x02 && key->u[13] == 0x02)
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;
@ -88,8 +103,6 @@ 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);
@ -99,39 +112,21 @@ mxf_dv_dif_create_caps (MXFMetadataTimelineTrack * track, GstTagList ** tags,
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);
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 ();
if (!*tags)
*tags = gst_tag_list_new ();
gst_tag_list_add (*tags, GST_TAG_MERGE_APPEND, GST_TAG_CODEC, "DV-DIF",
NULL);
}
gst_tag_list_add (*tags, GST_TAG_MERGE_APPEND, GST_TAG_CODEC, "DV-DIF", NULL);
return caps;
}

12
gst/mxf/mxfparse.c
View file

@ -203,6 +203,18 @@ mxf_is_generic_container_essence_container_label (const MXFUL * key)
key->u[11] == 0x01 && (key->u[12] == 0x01 || key->u[12] == 0x02));
}
/* Essence container label found in files generated by Avid */
static const guint8 avid_essence_container_label[] = {
0x06, 0x0e, 0x2b, 0x34, 0x01, 0x01, 0x01, 0xff, 0x4b, 0x46, 0x41, 0x41, 0x00,
0x0d, 0x4d, 0x4f
};
gboolean
mxf_is_avid_essence_container_label (const MXFUL * key)
{
return (memcmp (&key->u, avid_essence_container_label, 16) == 0);
}
gboolean
mxf_ul_is_equal (const MXFUL * a, const MXFUL * b)
{

1
gst/mxf/mxfparse.h
View file

@ -63,6 +63,7 @@ gboolean mxf_is_generic_container_system_item (const MXFUL *key);
gboolean mxf_is_generic_container_essence_element (const MXFUL *key);
gboolean mxf_is_generic_container_essence_container_label (const MXFUL *key);
gboolean mxf_is_avid_essence_container_label (const MXFUL *key);
gboolean mxf_is_fill (const MXFUL *key);