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240 lines
6.9 KiB
C
240 lines
6.9 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., 59 Temple Place - Suite 330,
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* Boston, MA 02111-1307, USA.
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*/
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/* Implementation of SMPTE 383M - Mapping DV-DIF data into the MXF
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* Generic Container
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*/
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/* TODO:
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* - playbin hangs on a lot of MXF/DV-DIF files (bug #563827)
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* - decodebin2 creates loops inside the linking graph (bug #563828)
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* - track descriptor might be multiple descriptor, one for sound, one for video
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* - there might be 2 tracks for one essence, i.e. one audio/one video track
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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 "mxfdv-dif.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_dv = { {
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0x06, 0x0e, 0x2b, 0x34, 0x04, 0x01, 0x01, 0x01, 0x04, 0x01, 0x02, 0x02,
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0x02}
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};
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static gboolean
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mxf_is_dv_dif_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 383M 8 */
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if (mxf_is_generic_container_essence_container_label (key) &&
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key->u[12] == 0x02 && key->u[13] == 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_dv, 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_dv_dif_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 383 6.1.1 */
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if (key->u[12] != 0x18 || (key->u[14] != 0x01 && key->u[14] != 0x02)) {
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GST_ERROR ("Invalid DV-DIF 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 GstCaps *
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mxf_dv_dif_create_caps (MXFMetadataTimelineTrack * track, GstTagList ** tags,
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MXFEssenceElementHandleFunc * handler, gpointer * mapping_data)
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{
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GstCaps *caps = NULL;
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guint i;
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MXFMetadataGenericPictureEssenceDescriptor *d = 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 (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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*handler = mxf_dv_dif_handle_essence_element;
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/* SMPTE 383M 8 */
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/* TODO: might be video or audio only, use values of the generic sound/picture
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* descriptor in the caps in that case
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*/
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GST_DEBUG ("Found DV-DIF stream");
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caps =
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gst_caps_new_simple ("video/x-dv", "systemstream", G_TYPE_BOOLEAN, TRUE,
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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 ();
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gst_tag_list_add (*tags, GST_TAG_MERGE_APPEND, GST_TAG_CODEC, "DV-DIF", NULL);
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return caps;
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}
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static const MXFEssenceElementHandler mxf_dv_dif_essence_element_handler = {
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mxf_is_dv_dif_essence_track,
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mxf_dv_dif_create_caps
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};
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static GstFlowReturn
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mxf_dv_dif_write_func (GstBuffer * buffer, GstCaps * caps,
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gpointer mapping_data, GstAdapter * adapter, GstBuffer ** outbuf,
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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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static const guint8 dv_dif_essence_container_ul[] = {
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0x06, 0x0e, 0x2b, 0x34, 0x04, 0x01, 0x01, 0x01,
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0x0d, 0x01, 0x03, 0x01, 0x02, 0x02, 0x7f, 0x01
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};
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static MXFMetadataFileDescriptor *
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mxf_dv_dif_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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ret = (MXFMetadataCDCIPictureEssenceDescriptor *)
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gst_mini_object_new (MXF_TYPE_METADATA_CDCI_PICTURE_ESSENCE_DESCRIPTOR);
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memcpy (&ret->parent.parent.essence_container, &dv_dif_essence_container_ul,
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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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gst_mini_object_unref (GST_MINI_OBJECT_CAST (ret));
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return NULL;
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}
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*handler = mxf_dv_dif_write_func;
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return (MXFMetadataFileDescriptor *) ret;
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}
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static void
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mxf_dv_dif_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_dv_dif_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_dv_dif_get_track_number_template (MXFMetadataFileDescriptor * a,
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GstCaps * caps, gpointer mapping_data)
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{
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return (0x18 << 24) | (0x01 << 8);
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}
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static MXFEssenceElementWriter mxf_dv_dif_essence_element_writer = {
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mxf_dv_dif_get_descriptor,
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mxf_dv_dif_update_descriptor,
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mxf_dv_dif_get_edit_rate,
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mxf_dv_dif_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_dv_dif_init (void)
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{
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mxf_essence_element_handler_register (&mxf_dv_dif_essence_element_handler);
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mxf_dv_dif_essence_element_writer.pad_template =
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gst_pad_template_new ("dv_dif_video_sink_%u", GST_PAD_SINK,
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GST_PAD_REQUEST,
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gst_caps_from_string ("video/x-dv, width = "
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GST_VIDEO_SIZE_RANGE ", height = " GST_VIDEO_SIZE_RANGE
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", framerate = " GST_VIDEO_FPS_RANGE ", systemstream = true"));
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memcpy (&mxf_dv_dif_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_dv_dif_essence_element_writer);
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}
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