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/* GStreamer MXF Apple ProRes Mapping
* Copyright (C) 2019 Tim-Philipp Müller <tim@centricular.com>
*
* 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.
*/
#ifdef HAVE_CONFIG_H
#include "config.h"
#endif
#include <gst/gst.h>
#include <gst/video/video.h>
#include <string.h>
#include "mxfprores.h"
#include "mxfessence.h"
GST_DEBUG_CATEGORY_EXTERN (mxf_debug);
#define GST_CAT_DEFAULT mxf_debug
/* Implementation of SMPTE RDD 44:2017-11 "Material Exchange Format - Mapping
* and Application of Apple ProRes"
*/
static gboolean
mxf_is_prores_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;
if (mxf_is_generic_container_essence_container_label (key) &&
key->u[12] == 0x02 && key->u[13] == 0x1C) {
return TRUE;
}
}
return FALSE;
}
static GstFlowReturn
mxf_prores_handle_essence_element (const MXFUL * key, GstBuffer * buffer,
GstCaps * caps,
MXFMetadataTimelineTrack * track,
gpointer mapping_data, GstBuffer ** outbuf)
{
*outbuf = buffer;
/* SMPTE RDD 41:2017-11 6.3 */
if (key->u[12] != 0x15 || key->u[14] != 0x17) {
GST_MEMDUMP ("Essence element", &key->u[0], 16);
GST_ERROR ("Invalid ProRes essence element");
return GST_FLOW_ERROR;
}
return GST_FLOW_OK;
}
static MXFEssenceWrapping
mxf_prores_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;
/* sanity check */
if (track->parent.descriptor[i]->essence_container.u[13] != 0x1C)
return MXF_ESSENCE_WRAPPING_CUSTOM_WRAPPING;
switch (track->parent.descriptor[i]->essence_container.u[14]) {
case 0x01:
return MXF_ESSENCE_WRAPPING_FRAME_WRAPPING;
case 0x02:
return MXF_ESSENCE_WRAPPING_CLIP_WRAPPING;
default:
return MXF_ESSENCE_WRAPPING_CUSTOM_WRAPPING;
}
}
return MXF_ESSENCE_WRAPPING_CUSTOM_WRAPPING;
}
static GstCaps *
mxf_prores_create_caps (MXFMetadataTimelineTrack * track, GstTagList ** tags,
gboolean * intra_only, MXFEssenceElementHandleFunc * handler,
gpointer * mapping_data)
{
MXFMetadataGenericPictureEssenceDescriptor *d = NULL;
const gchar *variant;
GstCaps *caps;
guint i;
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;
}
}
if (d == NULL) {
GST_ERROR ("No picture essence coding descriptor found for this track");
return NULL;
}
if (d->picture_essence_coding.u[13] != 0x06) {
GST_MEMDUMP ("Picture essence", &d->picture_essence_coding.u[0], 16);
GST_ERROR ("Picture essence coding descriptor not for ProRes?!");
return NULL;
}
GST_INFO ("Found Apple ProRes video stream");
switch (d->picture_essence_coding.u[14]) {
case 0x01:
variant = "proxy";
break;
case 0x02:
variant = "lt";
break;
case 0x03:
variant = "standard";
break;
case 0x04:
variant = "hq";
break;
case 0x05:
variant = "4444";
break;
case 0x06:
variant = "4444xq";
break;
default:
GST_ERROR ("Unknown ProRes profile %2d", d->picture_essence_coding.u[14]);
return NULL;
}
*handler = mxf_prores_handle_essence_element;
caps = gst_caps_new_simple ("video/x-prores",
"variant", G_TYPE_STRING, variant, 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, "Apple ProRes",
NULL);
*intra_only = TRUE;
return caps;
}
static const MXFEssenceElementHandler mxf_prores_essence_element_handler = {
mxf_is_prores_essence_track,
mxf_prores_get_track_wrapping,
mxf_prores_create_caps
};
void
mxf_prores_init (void)
{
mxf_essence_element_handler_register (&mxf_prores_essence_element_handler);
}
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