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210 lines
5.5 KiB
C
210 lines
5.5 KiB
C
/* GStreamer MXF Apple ProRes Mapping
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* Copyright (C) 2019 Tim-Philipp Müller <tim@centricular.com>
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*
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* This library is free software; you can redistribute it and/or
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* modify it under the terms of the GNU Library General Public
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* License as published by the Free Software Foundation; either
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* version 2 of the License, or (at your option) any later version.
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*
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* This library is distributed in the hope that it will be useful,
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* but WITHOUT ANY WARRANTY; without even the implied warranty of
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
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* Library General Public License for more details.
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*
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* You should have received a copy of the GNU Library General Public
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* License along with this library; if not, write to the
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* Free Software Foundation, Inc., 51 Franklin St, Fifth Floor,
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* Boston, MA 02110-1301, USA.
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*/
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#ifdef HAVE_CONFIG_H
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#include "config.h"
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#endif
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#include <gst/gst.h>
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#include <gst/video/video.h>
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#include <string.h>
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#include "mxfprores.h"
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#include "mxfessence.h"
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GST_DEBUG_CATEGORY_EXTERN (mxf_debug);
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#define GST_CAT_DEFAULT mxf_debug
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/* Implementation of SMPTE RDD 44:2017-11 "Material Exchange Format - Mapping
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* and Application of Apple ProRes"
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*/
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static gboolean
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mxf_is_prores_essence_track (const MXFMetadataTimelineTrack * track)
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{
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guint i;
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g_return_val_if_fail (track != NULL, FALSE);
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if (track->parent.descriptor == NULL)
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return FALSE;
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for (i = 0; i < track->parent.n_descriptor; i++) {
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MXFMetadataFileDescriptor *d = track->parent.descriptor[i];
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MXFUL *key;
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if (!d)
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continue;
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key = &d->essence_container;
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if (mxf_is_generic_container_essence_container_label (key) &&
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key->u[12] == 0x02 && key->u[13] == 0x1C) {
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return TRUE;
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}
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}
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return FALSE;
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}
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static GstFlowReturn
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mxf_prores_handle_essence_element (const MXFUL * key, GstBuffer * buffer,
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GstCaps * caps,
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MXFMetadataTimelineTrack * track,
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gpointer mapping_data, GstBuffer ** outbuf)
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{
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*outbuf = buffer;
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/* SMPTE RDD 41:2017-11 6.3 */
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if (key->u[12] != 0x15 || key->u[14] != 0x17) {
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GST_MEMDUMP ("Essence element", &key->u[0], 16);
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GST_ERROR ("Invalid ProRes essence element");
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return GST_FLOW_ERROR;
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}
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return GST_FLOW_OK;
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}
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static MXFEssenceWrapping
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mxf_prores_get_track_wrapping (const MXFMetadataTimelineTrack * track)
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{
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guint i;
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g_return_val_if_fail (track != NULL, MXF_ESSENCE_WRAPPING_CUSTOM_WRAPPING);
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if (track->parent.descriptor == NULL) {
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GST_ERROR ("No descriptor found for this track");
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return MXF_ESSENCE_WRAPPING_CUSTOM_WRAPPING;
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}
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for (i = 0; i < track->parent.n_descriptor; i++) {
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if (!track->parent.descriptor[i])
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continue;
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if (!MXF_IS_METADATA_GENERIC_PICTURE_ESSENCE_DESCRIPTOR (track->
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parent.descriptor[i]))
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continue;
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/* sanity check */
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if (track->parent.descriptor[i]->essence_container.u[13] != 0x1C)
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return MXF_ESSENCE_WRAPPING_CUSTOM_WRAPPING;
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switch (track->parent.descriptor[i]->essence_container.u[14]) {
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case 0x01:
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return MXF_ESSENCE_WRAPPING_FRAME_WRAPPING;
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case 0x02:
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return MXF_ESSENCE_WRAPPING_CLIP_WRAPPING;
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default:
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return MXF_ESSENCE_WRAPPING_CUSTOM_WRAPPING;
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}
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}
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return MXF_ESSENCE_WRAPPING_CUSTOM_WRAPPING;
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}
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static GstCaps *
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mxf_prores_create_caps (MXFMetadataTimelineTrack * track, GstTagList ** tags,
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gboolean * intra_only, MXFEssenceElementHandleFunc * handler,
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gpointer * mapping_data)
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{
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MXFMetadataGenericPictureEssenceDescriptor *d = NULL;
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const gchar *variant;
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GstCaps *caps;
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guint i;
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g_return_val_if_fail (track != NULL, NULL);
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if (track->parent.descriptor == NULL) {
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GST_ERROR ("No descriptor found for this track");
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return NULL;
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}
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for (i = 0; i < track->parent.n_descriptor; i++) {
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if (MXF_IS_METADATA_GENERIC_PICTURE_ESSENCE_DESCRIPTOR (track->
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parent.descriptor[i])) {
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d = MXF_METADATA_GENERIC_PICTURE_ESSENCE_DESCRIPTOR (track->
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parent.descriptor[i]);
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break;
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}
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}
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if (d == NULL) {
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GST_ERROR ("No picture essence coding descriptor found for this track");
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return NULL;
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}
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if (d->picture_essence_coding.u[13] != 0x06) {
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GST_MEMDUMP ("Picture essence", &d->picture_essence_coding.u[0], 16);
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GST_ERROR ("Picture essence coding descriptor not for ProRes?!");
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return NULL;
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}
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GST_INFO ("Found Apple ProRes video stream");
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switch (d->picture_essence_coding.u[14]) {
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case 0x01:
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variant = "proxy";
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break;
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case 0x02:
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variant = "lt";
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break;
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case 0x03:
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variant = "standard";
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break;
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case 0x04:
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variant = "hq";
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break;
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case 0x05:
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variant = "4444";
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break;
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case 0x06:
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variant = "4444xq";
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break;
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default:
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GST_ERROR ("Unknown ProRes profile %2d", d->picture_essence_coding.u[14]);
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return NULL;
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}
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*handler = mxf_prores_handle_essence_element;
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caps = gst_caps_new_simple ("video/x-prores",
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"variant", G_TYPE_STRING, variant, NULL);
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if (d)
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mxf_metadata_generic_picture_essence_descriptor_set_caps (d, caps);
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if (!*tags)
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*tags = gst_tag_list_new_empty ();
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gst_tag_list_add (*tags, GST_TAG_MERGE_APPEND, GST_TAG_CODEC, "Apple ProRes",
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NULL);
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*intra_only = TRUE;
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return caps;
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}
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static const MXFEssenceElementHandler mxf_prores_essence_element_handler = {
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mxf_is_prores_essence_track,
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mxf_prores_get_track_wrapping,
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mxf_prores_create_caps
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};
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void
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mxf_prores_init (void)
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{
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mxf_essence_element_handler_register (&mxf_prores_essence_element_handler);
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}
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