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https://gitlab.freedesktop.org/gstreamer/gstreamer.git
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291 lines
8.3 KiB
C
291 lines
8.3 KiB
C
/* GStreamer
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* Copyright (C) 2008-2009 Sebastian Dröge <sebastian.droege@collabora.co.uk>
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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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/* Implementation of SMPTE S2019-4 - Mapping VC-3 coding units into the MXF
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* Generic Container
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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 "mxfvc3.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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static const MXFUL picture_essence_coding_vc3_avid = { {
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0x06, 0x0e, 0x2b, 0x34, 0x04, 0x01, 0x01, 0x01, 0x0e, 0x04, 0x02, 0x01,
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0x02,
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0x04, 0x01, 0x00}
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};
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static gboolean
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mxf_is_vc3_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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/* SMPTE S2019-4 7 */
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if (mxf_is_generic_container_essence_container_label (key) &&
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key->u[12] == 0x02 && key->u[13] == 0x11 &&
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(key->u[14] == 0x01 || key->u[14] == 0x02)) {
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return TRUE;
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} else if (mxf_is_avid_essence_container_label (key)) {
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MXFMetadataGenericPictureEssenceDescriptor *p;
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if (!MXF_IS_METADATA_GENERIC_PICTURE_ESSENCE_DESCRIPTOR (d))
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return FALSE;
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p = MXF_METADATA_GENERIC_PICTURE_ESSENCE_DESCRIPTOR (d);
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key = &p->picture_essence_coding;
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if (mxf_ul_is_subclass (&picture_essence_coding_vc3_avid, key))
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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_vc3_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 2019-4 6.1 */
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if (key->u[12] != 0x15 || (key->u[14] != 0x05 && key->u[14] != 0x06
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&& key->u[14] != 0x0C && key->u[14] != 0x0D)) {
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GST_ERROR ("Invalid VC-3 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_vc3_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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&& !(MXF_IS_METADATA_FILE_DESCRIPTOR (track->parent.descriptor[i])
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&& !MXF_IS_METADATA_MULTIPLE_DESCRIPTOR (track->
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parent.descriptor[i])))
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continue;
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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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break;
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case 0x02:
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return MXF_ESSENCE_WRAPPING_CLIP_WRAPPING;
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break;
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default:
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return MXF_ESSENCE_WRAPPING_CUSTOM_WRAPPING;
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break;
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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_vc3_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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MXFMetadataFileDescriptor *f = NULL;
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MXFMetadataGenericPictureEssenceDescriptor *p = NULL;
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guint i;
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GstCaps *caps = NULL;
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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 (!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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p = (MXFMetadataGenericPictureEssenceDescriptor *) track->parent.
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descriptor[i];
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f = track->parent.descriptor[i];
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break;
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} else if (MXF_IS_METADATA_FILE_DESCRIPTOR (track->parent.descriptor[i]) &&
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!MXF_IS_METADATA_MULTIPLE_DESCRIPTOR (track->parent.descriptor[i])) {
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f = track->parent.descriptor[i];
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}
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}
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if (!f) {
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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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*handler = mxf_vc3_handle_essence_element;
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caps = gst_caps_new_empty_simple ("video/x-dnxhd");
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if (p) {
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mxf_metadata_generic_picture_essence_descriptor_set_caps (p, caps);
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} else {
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GST_WARNING ("Only a generic file descriptor found");
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}
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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_VIDEO_CODEC,
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"VC-3 Video", 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_vc3_essence_element_handler = {
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mxf_is_vc3_essence_track,
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mxf_vc3_get_track_wrapping,
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mxf_vc3_create_caps
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};
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static GstFlowReturn
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mxf_vc3_write_func (GstBuffer * buffer, gpointer mapping_data,
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GstAdapter * adapter, GstBuffer ** outbuf, gboolean flush)
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{
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*outbuf = buffer;
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return GST_FLOW_OK;
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}
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/* FIXME: In which version was this added? Byte 7, assuming version 10 */
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static const guint8 vc3_essence_container_ul[] = {
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0x06, 0x0e, 0x2b, 0x34, 0x04, 0x01, 0x01, 0x0A,
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0x0d, 0x01, 0x03, 0x01, 0x02, 0x11, 0x01, 0x00
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};
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static MXFMetadataFileDescriptor *
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mxf_vc3_get_descriptor (GstPadTemplate * tmpl, GstCaps * caps,
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MXFEssenceElementWriteFunc * handler, gpointer * mapping_data)
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{
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MXFMetadataCDCIPictureEssenceDescriptor *ret;
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GstStructure *s;
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s = gst_caps_get_structure (caps, 0);
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if (strcmp (gst_structure_get_name (s), "video/x-dnxhd") != 0) {
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GST_ERROR ("Invalid caps %" GST_PTR_FORMAT, caps);
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return NULL;
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}
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ret = (MXFMetadataCDCIPictureEssenceDescriptor *)
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g_object_new (MXF_TYPE_METADATA_CDCI_PICTURE_ESSENCE_DESCRIPTOR, NULL);
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memcpy (&ret->parent.parent.essence_container, &vc3_essence_container_ul, 16);
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if (!mxf_metadata_generic_picture_essence_descriptor_from_caps (&ret->parent,
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caps)) {
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g_object_unref (ret);
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return NULL;
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}
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*handler = mxf_vc3_write_func;
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return (MXFMetadataFileDescriptor *) ret;
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}
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static void
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mxf_vc3_update_descriptor (MXFMetadataFileDescriptor * d, GstCaps * caps,
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gpointer mapping_data, GstBuffer * buf)
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{
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return;
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}
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static void
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mxf_vc3_get_edit_rate (MXFMetadataFileDescriptor * a, GstCaps * caps,
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gpointer mapping_data, GstBuffer * buf, MXFMetadataSourcePackage * package,
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MXFMetadataTimelineTrack * track, MXFFraction * edit_rate)
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{
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edit_rate->n = a->sample_rate.n;
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edit_rate->d = a->sample_rate.d;
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}
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static guint32
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mxf_vc3_get_track_number_template (MXFMetadataFileDescriptor * a,
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GstCaps * caps, gpointer mapping_data)
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{
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return (0x15 << 24) | (0x0C << 8);
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}
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static MXFEssenceElementWriter mxf_vc3_essence_element_writer = {
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mxf_vc3_get_descriptor,
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mxf_vc3_update_descriptor,
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mxf_vc3_get_edit_rate,
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mxf_vc3_get_track_number_template,
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NULL,
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{{0,}}
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};
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void
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mxf_vc3_init (void)
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{
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mxf_essence_element_handler_register (&mxf_vc3_essence_element_handler);
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mxf_vc3_essence_element_writer.pad_template =
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gst_pad_template_new ("vc3_video_sink_%u", GST_PAD_SINK, GST_PAD_REQUEST,
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gst_caps_from_string ("video/x-dnxhd, width = " GST_VIDEO_SIZE_RANGE
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", height = " GST_VIDEO_SIZE_RANGE ", framerate = "
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GST_VIDEO_FPS_RANGE));
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memcpy (&mxf_vc3_essence_element_writer.data_definition,
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mxf_metadata_track_identifier_get (MXF_METADATA_TRACK_PICTURE_ESSENCE),
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16);
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mxf_essence_element_writer_register (&mxf_vc3_essence_element_writer);
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}
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