/* 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., 59 Temple Place - Suite 330, * Boston, MA 02111-1307, USA. */ /* Implementation of SMPTE S2019-4 - Mapping VC-3 coding units into the MXF * Generic Container */ #ifdef HAVE_CONFIG_H #include "config.h" #endif #include <gst/gst.h> #include <string.h> #include "mxfvc3.h" GST_DEBUG_CATEGORY_EXTERN (mxf_debug); #define GST_CAT_DEFAULT mxf_debug static const guint8 picture_essence_coding_vc3_avid[] = { 0x06, 0x0e, 0x2b, 0x34, 0x04, 0x01, 0x01, 0x01, 0x0e, 0x04, 0x02, 0x01, 0x02, 0x04, 0x01, 0x00 }; static gboolean mxf_is_vc3_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 S2019-4 7 */ if (mxf_is_generic_container_essence_container_label (key) && key->u[12] == 0x02 && key->u[13] == 0x11 && (key->u[14] == 0x01 || key->u[14] == 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_vc3_avid, 16) == 0) return TRUE; } } return FALSE; } static GstFlowReturn mxf_vc3_handle_essence_element (const MXFUL * key, GstBuffer * buffer, GstCaps * caps, MXFMetadataTimelineTrack * track, gpointer mapping_data, GstBuffer ** outbuf) { *outbuf = buffer; /* SMPTE 2019-4 6.1 */ if (key->u[12] != 0x15 || (key->u[14] != 0x05 && key->u[14] != 0x06)) { GST_ERROR ("Invalid VC-3 essence element"); return GST_FLOW_ERROR; } return GST_FLOW_OK; } static GstCaps * mxf_vc3_create_caps (MXFMetadataTimelineTrack * track, GstTagList ** tags, MXFEssenceElementHandleFunc * handler, gpointer * mapping_data) { MXFMetadataFileDescriptor *f = NULL; MXFMetadataGenericPictureEssenceDescriptor *p = NULL; guint i; GstCaps *caps = 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 (!track->parent.descriptor[i]) continue; if (MXF_IS_METADATA_GENERIC_PICTURE_ESSENCE_DESCRIPTOR (track-> parent.descriptor[i])) { p = (MXFMetadataGenericPictureEssenceDescriptor *) track->parent. descriptor[i]; f = track->parent.descriptor[i]; break; } else 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_vc3_handle_essence_element; caps = gst_caps_new_simple ("video/x-dnxhd", NULL); if (p) { mxf_metadata_generic_picture_essence_descriptor_set_caps (p, caps); } else { GST_WARNING ("Only a generic file descriptor found"); } if (!*tags) *tags = gst_tag_list_new (); gst_tag_list_add (*tags, GST_TAG_MERGE_APPEND, GST_TAG_VIDEO_CODEC, "VC-3 Video", NULL); return caps; } static const MXFEssenceElementHandler mxf_vc3_essence_element_handler = { mxf_is_vc3_essence_track, mxf_vc3_create_caps }; void mxf_vc3_init (void) { mxf_essence_element_handler_register (&mxf_vc3_essence_element_handler); }