/* GStreamer * Copyright (C) 2008-2009 Sebastian Dröge * * 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. */ /** * SECTION:element-mxfdemux * * mxfdemux demuxes an MXF file into the different contained streams. * * * Example launch line * |[ * gst-launch -v filesrc location=/path/to/mxf ! mxfdemux ! audioconvert ! autoaudiosink * ]| This pipeline demuxes an MXF file and outputs one of the contained raw audio streams. * */ /* TODO: * - Seeking support: Use IndexTableSegments * - Handle timecode tracks correctly (where is this documented?) * - Handle drop-frame field of timecode tracks * - Handle Generic container system items * - Implement correct support for clip-wrapped essence elements. * - Post structural metadata and descriptive metadata trees as a message on the bus * and send them downstream as event. * - Multichannel audio needs channel layouts, define them (SMPTE S320M?). * - Correctly handle the different rectangles and aspect-ratio for video * - Add more support for non-standard MXF used by Avid (bug #561922). * - Fix frame layout stuff, i.e. interlaced/progressive * - In pull mode first find the first buffer for every pad before pushing * to prevent jumpy playback in the beginning due to resynchronization. * * - Implement SMPTE D11 essence and the digital cinema/MXF specs */ #ifdef HAVE_CONFIG_H #include "config.h" #endif /* FIXME 0.11: suppress warnings for deprecated API such as GStaticRecMutex * with newer GLib versions (>= 2.31.0) */ #define GLIB_DISABLE_DEPRECATION_WARNINGS #include "mxfdemux.h" #include "mxfessence.h" #include static GstStaticPadTemplate mxf_sink_template = GST_STATIC_PAD_TEMPLATE ("sink", GST_PAD_SINK, GST_PAD_ALWAYS, GST_STATIC_CAPS ("application/mxf") ); static GstStaticPadTemplate mxf_src_template = GST_STATIC_PAD_TEMPLATE ("track_%u", GST_PAD_SRC, GST_PAD_SOMETIMES, GST_STATIC_CAPS_ANY); GST_DEBUG_CATEGORY_STATIC (mxfdemux_debug); #define GST_CAT_DEFAULT mxfdemux_debug GType gst_mxf_demux_pad_get_type (void); G_DEFINE_TYPE (GstMXFDemuxPad, gst_mxf_demux_pad, GST_TYPE_PAD); static void gst_mxf_demux_pad_finalize (GObject * object) { GstMXFDemuxPad *pad = GST_MXF_DEMUX_PAD (object); if (pad->tags) { gst_tag_list_unref (pad->tags); pad->tags = NULL; } G_OBJECT_CLASS (gst_mxf_demux_pad_parent_class)->finalize (object); } static void gst_mxf_demux_pad_class_init (GstMXFDemuxPadClass * klass) { GObjectClass *gobject_class = (GObjectClass *) klass; gobject_class->finalize = gst_mxf_demux_pad_finalize; } static void gst_mxf_demux_pad_init (GstMXFDemuxPad * pad) { pad->last_flow = GST_FLOW_OK; pad->position = 0; } enum { PROP_0, PROP_PACKAGE, PROP_MAX_DRIFT, PROP_STRUCTURE }; static gboolean gst_mxf_demux_sink_event (GstPad * pad, GstObject * parent, GstEvent * event); static gboolean gst_mxf_demux_src_event (GstPad * pad, GstObject * parent, GstEvent * event); static gboolean gst_mxf_demux_src_query (GstPad * pad, GstObject * parent, GstQuery * query); #define gst_mxf_demux_parent_class parent_class G_DEFINE_TYPE (GstMXFDemux, gst_mxf_demux, GST_TYPE_ELEMENT); static void gst_mxf_demux_remove_pad (GstMXFDemuxPad * pad, GstMXFDemux * demux) { gst_flow_combiner_remove_pad (demux->flowcombiner, GST_PAD_CAST (pad)); gst_element_remove_pad (GST_ELEMENT (demux), GST_PAD_CAST (pad)); } static void gst_mxf_demux_remove_pads (GstMXFDemux * demux) { g_ptr_array_foreach (demux->src, (GFunc) gst_mxf_demux_remove_pad, demux); g_ptr_array_foreach (demux->src, (GFunc) gst_object_unref, NULL); g_ptr_array_set_size (demux->src, 0); } static void gst_mxf_demux_partition_free (GstMXFDemuxPartition * partition) { mxf_partition_pack_reset (&partition->partition); mxf_primer_pack_reset (&partition->primer); g_free (partition); } static void gst_mxf_demux_reset_mxf_state (GstMXFDemux * demux) { guint i; GST_DEBUG_OBJECT (demux, "Resetting MXF state"); g_list_foreach (demux->partitions, (GFunc) gst_mxf_demux_partition_free, NULL); g_list_free (demux->partitions); demux->partitions = NULL; demux->current_partition = NULL; for (i = 0; i < demux->essence_tracks->len; i++) { GstMXFDemuxEssenceTrack *t = &g_array_index (demux->essence_tracks, GstMXFDemuxEssenceTrack, i); if (t->offsets) g_array_free (t->offsets, TRUE); g_free (t->mapping_data); if (t->tags) gst_tag_list_unref (t->tags); if (t->caps) gst_caps_unref (t->caps); } g_array_set_size (demux->essence_tracks, 0); } static void gst_mxf_demux_reset_linked_metadata (GstMXFDemux * demux) { guint i; for (i = 0; i < demux->src->len; i++) { GstMXFDemuxPad *pad = g_ptr_array_index (demux->src, i); pad->material_track = NULL; pad->material_package = NULL; pad->current_component = NULL; } for (i = 0; i < demux->essence_tracks->len; i++) { GstMXFDemuxEssenceTrack *track = &g_array_index (demux->essence_tracks, GstMXFDemuxEssenceTrack, i); track->source_package = NULL; track->source_track = NULL; } demux->current_package = NULL; } static void gst_mxf_demux_reset_metadata (GstMXFDemux * demux) { GST_DEBUG_OBJECT (demux, "Resetting metadata"); g_rw_lock_writer_lock (&demux->metadata_lock); demux->update_metadata = TRUE; demux->metadata_resolved = FALSE; gst_mxf_demux_reset_linked_metadata (demux); demux->preface = NULL; if (demux->metadata) { g_hash_table_destroy (demux->metadata); } demux->metadata = mxf_metadata_hash_table_new (); if (demux->tags) { gst_tag_list_unref (demux->tags); demux->tags = NULL; } g_rw_lock_writer_unlock (&demux->metadata_lock); } static void gst_mxf_demux_reset (GstMXFDemux * demux) { GST_DEBUG_OBJECT (demux, "cleaning up MXF demuxer"); demux->flushing = FALSE; demux->footer_partition_pack_offset = 0; demux->offset = 0; demux->pull_footer_metadata = TRUE; demux->run_in = -1; memset (&demux->current_package_uid, 0, sizeof (MXFUMID)); gst_segment_init (&demux->segment, GST_FORMAT_TIME); if (demux->close_seg_event) { gst_event_unref (demux->close_seg_event); demux->close_seg_event = NULL; } gst_adapter_clear (demux->adapter); gst_mxf_demux_remove_pads (demux); if (demux->random_index_pack) { g_array_free (demux->random_index_pack, TRUE); demux->random_index_pack = NULL; } if (demux->pending_index_table_segments) { GList *l; for (l = demux->pending_index_table_segments; l; l = l->next) { MXFIndexTableSegment *s = l->data; mxf_index_table_segment_reset (s); g_free (s); } g_list_free (demux->pending_index_table_segments); demux->pending_index_table_segments = NULL; } gst_mxf_demux_reset_mxf_state (demux); gst_mxf_demux_reset_metadata (demux); demux->have_group_id = FALSE; demux->group_id = G_MAXUINT; } static GstFlowReturn gst_mxf_demux_combine_flows (GstMXFDemux * demux, GstMXFDemuxPad * pad, GstFlowReturn ret) { /* store the value */ pad->last_flow = ret; ret = gst_flow_combiner_update_flow (demux->flowcombiner, ret); GST_LOG_OBJECT (demux, "combined return %s", gst_flow_get_name (ret)); return ret; } static GstFlowReturn gst_mxf_demux_pull_range (GstMXFDemux * demux, guint64 offset, guint size, GstBuffer ** buffer) { GstFlowReturn ret; ret = gst_pad_pull_range (demux->sinkpad, offset, size, buffer); if (G_UNLIKELY (ret != GST_FLOW_OK)) { GST_WARNING_OBJECT (demux, "failed when pulling %u bytes from offset %" G_GUINT64_FORMAT ": %s", size, offset, gst_flow_get_name (ret)); *buffer = NULL; return ret; } if (G_UNLIKELY (*buffer && gst_buffer_get_size (*buffer) != size)) { GST_WARNING_OBJECT (demux, "partial pull got %" G_GSIZE_FORMAT " when expecting %u from offset %" G_GUINT64_FORMAT, gst_buffer_get_size (*buffer), size, offset); gst_buffer_unref (*buffer); ret = GST_FLOW_EOS; *buffer = NULL; return ret; } return ret; } static gboolean gst_mxf_demux_push_src_event (GstMXFDemux * demux, GstEvent * event) { gboolean ret = TRUE; guint i; GST_DEBUG_OBJECT (demux, "Pushing '%s' event downstream", GST_EVENT_TYPE_NAME (event)); for (i = 0; i < demux->src->len; i++) { GstMXFDemuxPad *pad = GST_MXF_DEMUX_PAD (g_ptr_array_index (demux->src, i)); if (pad->eos && GST_EVENT_TYPE (event) == GST_EVENT_EOS) continue; ret |= gst_pad_push_event (GST_PAD_CAST (pad), gst_event_ref (event)); } gst_event_unref (event); return ret; } static GstMXFDemuxPad * gst_mxf_demux_get_earliest_pad (GstMXFDemux * demux) { guint i; GstClockTime earliest = GST_CLOCK_TIME_NONE; GstMXFDemuxPad *pad = NULL; for (i = 0; i < demux->src->len; i++) { GstMXFDemuxPad *p = g_ptr_array_index (demux->src, i); if (!p->eos && p->last_flow < earliest) { earliest = p->last_flow; pad = p; } } return pad; } static gint gst_mxf_demux_partition_compare (GstMXFDemuxPartition * a, GstMXFDemuxPartition * b) { return (a->partition.this_partition - b->partition.this_partition); } static GstFlowReturn gst_mxf_demux_handle_partition_pack (GstMXFDemux * demux, const MXFUL * key, GstBuffer * buffer) { MXFPartitionPack partition; GList *l; GstMXFDemuxPartition *p = NULL; GstMapInfo map; gboolean ret; GST_DEBUG_OBJECT (demux, "Handling partition pack of size %" G_GSIZE_FORMAT " at offset %" G_GUINT64_FORMAT, gst_buffer_get_size (buffer), demux->offset); for (l = demux->partitions; l; l = l->next) { GstMXFDemuxPartition *tmp = l->data; if (tmp->partition.this_partition + demux->run_in == demux->offset && tmp->partition.major_version == 0x0001) { GST_DEBUG_OBJECT (demux, "Partition already parsed"); p = tmp; goto out; } } gst_buffer_map (buffer, &map, GST_MAP_READ); ret = mxf_partition_pack_parse (key, &partition, map.data, map.size); gst_buffer_unmap (buffer, &map); if (!ret) { GST_ERROR_OBJECT (demux, "Parsing partition pack failed"); return GST_FLOW_ERROR; } if (partition.this_partition != demux->offset + demux->run_in) { GST_WARNING_OBJECT (demux, "Partition with incorrect offset"); partition.this_partition = demux->offset + demux->run_in; } if (partition.type == MXF_PARTITION_PACK_HEADER) demux->footer_partition_pack_offset = partition.footer_partition; for (l = demux->partitions; l; l = l->next) { GstMXFDemuxPartition *tmp = l->data; if (tmp->partition.this_partition + demux->run_in == demux->offset) { p = tmp; break; } } if (p) { mxf_partition_pack_reset (&p->partition); memcpy (&p->partition, &partition, sizeof (MXFPartitionPack)); } else { p = g_new0 (GstMXFDemuxPartition, 1); memcpy (&p->partition, &partition, sizeof (MXFPartitionPack)); demux->partitions = g_list_insert_sorted (demux->partitions, p, (GCompareFunc) gst_mxf_demux_partition_compare); } for (l = demux->partitions; l; l = l->next) { GstMXFDemuxPartition *a, *b; if (l->next == NULL) break; a = l->data; b = l->next->data; b->partition.prev_partition = a->partition.this_partition; } out: demux->current_partition = p; return GST_FLOW_OK; } static GstFlowReturn gst_mxf_demux_handle_primer_pack (GstMXFDemux * demux, const MXFUL * key, GstBuffer * buffer) { GstMapInfo map; gboolean ret; GST_DEBUG_OBJECT (demux, "Handling primer pack of size %" G_GSIZE_FORMAT " at offset %" G_GUINT64_FORMAT, gst_buffer_get_size (buffer), demux->offset); if (G_UNLIKELY (!demux->current_partition)) { GST_ERROR_OBJECT (demux, "Primer pack before partition pack"); return GST_FLOW_ERROR; } if (G_UNLIKELY (demux->current_partition->primer.mappings)) { GST_DEBUG_OBJECT (demux, "Primer pack already exists"); return GST_FLOW_OK; } gst_buffer_map (buffer, &map, GST_MAP_READ); ret = mxf_primer_pack_parse (key, &demux->current_partition->primer, map.data, map.size); gst_buffer_unmap (buffer, &map); if (!ret) { GST_ERROR_OBJECT (demux, "Parsing primer pack failed"); return GST_FLOW_ERROR; } demux->current_partition->primer.offset = demux->offset; return GST_FLOW_OK; } static GstFlowReturn gst_mxf_demux_resolve_references (GstMXFDemux * demux) { GstFlowReturn ret = GST_FLOW_OK; GHashTableIter iter; MXFMetadataBase *m = NULL; GstStructure *structure; g_rw_lock_writer_lock (&demux->metadata_lock); GST_DEBUG_OBJECT (demux, "Resolve metadata references"); demux->update_metadata = FALSE; if (!demux->metadata) { GST_ERROR_OBJECT (demux, "No metadata yet"); g_rw_lock_writer_unlock (&demux->metadata_lock); return GST_FLOW_ERROR; } g_hash_table_iter_init (&iter, demux->metadata); while (g_hash_table_iter_next (&iter, NULL, (gpointer) & m)) { m->resolved = MXF_METADATA_BASE_RESOLVE_STATE_NONE; } g_hash_table_iter_init (&iter, demux->metadata); while (g_hash_table_iter_next (&iter, NULL, (gpointer) & m)) { gboolean resolved; resolved = mxf_metadata_base_resolve (m, demux->metadata); /* Resolving can fail for anything but the preface, as the preface * will resolve everything required */ if (!resolved && MXF_IS_METADATA_PREFACE (m)) { ret = GST_FLOW_ERROR; goto error; } } demux->metadata_resolved = TRUE; structure = mxf_metadata_base_to_structure (MXF_METADATA_BASE (demux->preface)); if (!demux->tags) demux->tags = gst_tag_list_new_empty (); gst_tag_list_add (demux->tags, GST_TAG_MERGE_REPLACE, GST_TAG_MXF_STRUCTURE, structure, NULL); gst_structure_free (structure); g_rw_lock_writer_unlock (&demux->metadata_lock); return ret; error: demux->metadata_resolved = FALSE; g_rw_lock_writer_unlock (&demux->metadata_lock); return ret; } static MXFMetadataGenericPackage * gst_mxf_demux_find_package (GstMXFDemux * demux, const MXFUMID * umid) { MXFMetadataGenericPackage *ret = NULL; guint i; if (demux->preface->content_storage && demux->preface->content_storage->packages) { for (i = 0; i < demux->preface->content_storage->n_packages; i++) { MXFMetadataGenericPackage *p = demux->preface->content_storage->packages[i]; if (!p) continue; if (mxf_umid_is_equal (&p->package_uid, umid)) { ret = p; break; } } } return ret; } static MXFMetadataGenericPackage * gst_mxf_demux_choose_package (GstMXFDemux * demux) { MXFMetadataGenericPackage *ret = NULL; guint i; if (demux->requested_package_string) { MXFUMID umid = { {0,} }; if (!mxf_umid_from_string (demux->requested_package_string, &umid)) { GST_ERROR_OBJECT (demux, "Invalid requested package"); } g_free (demux->requested_package_string); demux->requested_package_string = NULL; ret = gst_mxf_demux_find_package (demux, &umid); } if (!ret && !mxf_umid_is_zero (&demux->current_package_uid)) ret = gst_mxf_demux_find_package (demux, &demux->current_package_uid); if (ret && (MXF_IS_METADATA_MATERIAL_PACKAGE (ret) || (MXF_IS_METADATA_SOURCE_PACKAGE (ret) && MXF_METADATA_SOURCE_PACKAGE (ret)->top_level))) goto done; else if (ret) GST_WARNING_OBJECT (demux, "Current package is not a material package or top-level source package, choosing the first best"); else if (!mxf_umid_is_zero (&demux->current_package_uid)) GST_WARNING_OBJECT (demux, "Current package not found, choosing the first best"); ret = demux->preface->primary_package; if (ret && (MXF_IS_METADATA_MATERIAL_PACKAGE (ret) || (MXF_IS_METADATA_SOURCE_PACKAGE (ret) && MXF_METADATA_SOURCE_PACKAGE (ret)->top_level))) goto done; ret = NULL; for (i = 0; i < demux->preface->content_storage->n_packages; i++) { if (demux->preface->content_storage->packages[i] && MXF_IS_METADATA_MATERIAL_PACKAGE (demux->preface->content_storage-> packages[i])) { ret = MXF_METADATA_GENERIC_PACKAGE (demux->preface->content_storage-> packages[i]); break; } } if (!ret) { GST_ERROR_OBJECT (demux, "No material package"); return NULL; } done: if (mxf_umid_is_equal (&ret->package_uid, &demux->current_package_uid)) { gchar current_package_string[96]; gst_mxf_demux_remove_pads (demux); memcpy (&demux->current_package_uid, &ret->package_uid, 32); mxf_umid_to_string (&ret->package_uid, current_package_string); demux->current_package_string = g_strdup (current_package_string); g_object_notify (G_OBJECT (demux), "package"); if (!demux->tags) demux->tags = gst_tag_list_new_empty (); gst_tag_list_add (demux->tags, GST_TAG_MERGE_REPLACE, GST_TAG_MXF_UMID, demux->current_package_string, NULL); } demux->current_package = ret; return ret; } static GstFlowReturn gst_mxf_demux_update_essence_tracks (GstMXFDemux * demux) { guint i, j, k; g_return_val_if_fail (demux->preface->content_storage, GST_FLOW_ERROR); g_return_val_if_fail (demux->preface->content_storage->essence_container_data, GST_FLOW_ERROR); for (i = 0; i < demux->preface->content_storage->n_essence_container_data; i++) { MXFMetadataEssenceContainerData *edata; MXFMetadataSourcePackage *package; if (demux->preface->content_storage->essence_container_data[i] == NULL) continue; edata = demux->preface->content_storage->essence_container_data[i]; if (!edata->linked_package) { GST_WARNING_OBJECT (demux, "Linked package not resolved"); continue; } package = edata->linked_package; if (!package->parent.tracks) { GST_WARNING_OBJECT (demux, "Linked package with no resolved tracks"); continue; } for (j = 0; j < package->parent.n_tracks; j++) { MXFMetadataTimelineTrack *track; GstMXFDemuxEssenceTrack *etrack = NULL; GstCaps *caps = NULL; gboolean new = FALSE; if (!package->parent.tracks[j] || !MXF_IS_METADATA_TIMELINE_TRACK (package->parent.tracks[j])) continue; track = MXF_METADATA_TIMELINE_TRACK (package->parent.tracks[j]); if ((track->parent.type & 0xf0) != 0x30) continue; if (track->edit_rate.n <= 0 || track->edit_rate.d <= 0) { GST_WARNING_OBJECT (demux, "Invalid edit rate"); continue; } for (k = 0; k < demux->essence_tracks->len; k++) { GstMXFDemuxEssenceTrack *tmp = &g_array_index (demux->essence_tracks, GstMXFDemuxEssenceTrack, k); if (tmp->track_number == track->parent.track_number && tmp->body_sid == edata->body_sid) { if (tmp->track_id != track->parent.track_id || !mxf_umid_is_equal (&tmp->source_package_uid, &package->parent.package_uid)) { GST_ERROR_OBJECT (demux, "There already exists a different track " "with this track number and body sid but a different source " "or source track id -- ignoring"); continue; } etrack = tmp; break; } } if (!etrack) { GstMXFDemuxEssenceTrack tmp; memset (&tmp, 0, sizeof (tmp)); tmp.body_sid = edata->body_sid; tmp.track_number = track->parent.track_number; tmp.track_id = track->parent.track_id; memcpy (&tmp.source_package_uid, &package->parent.package_uid, 32); if (demux->current_partition->partition.body_sid == edata->body_sid && demux->current_partition->partition.body_offset == 0) tmp.position = 0; else tmp.position = -1; g_array_append_val (demux->essence_tracks, tmp); etrack = &g_array_index (demux->essence_tracks, GstMXFDemuxEssenceTrack, demux->essence_tracks->len - 1); new = TRUE; } etrack->source_package = NULL; etrack->source_track = NULL; if (!track->parent.sequence) { GST_WARNING_OBJECT (demux, "Source track has no sequence"); goto next; } if (track->parent.n_descriptor == 0) { GST_WARNING_OBJECT (demux, "Source track has no descriptors"); goto next; } if (track->parent.sequence->duration > etrack->duration) etrack->duration = track->parent.sequence->duration; g_free (etrack->mapping_data); etrack->mapping_data = NULL; etrack->handler = NULL; etrack->handle_func = NULL; if (etrack->tags) gst_tag_list_unref (etrack->tags); etrack->tags = NULL; etrack->handler = mxf_essence_element_handler_find (track); if (!etrack->handler) { gchar essence_container[48]; gchar essence_compression[48]; gchar *name; GST_WARNING_OBJECT (demux, "No essence element handler for track %u found", i); mxf_ul_to_string (&track->parent.descriptor[0]->essence_container, essence_container); if (track->parent.type == MXF_METADATA_TRACK_PICTURE_ESSENCE) { if (MXF_IS_METADATA_GENERIC_PICTURE_ESSENCE_DESCRIPTOR (track->parent. descriptor[0])) mxf_ul_to_string (&MXF_METADATA_GENERIC_PICTURE_ESSENCE_DESCRIPTOR (track->parent.descriptor[0])->picture_essence_coding, essence_compression); name = g_strdup_printf ("video/x-mxf-%s-%s", essence_container, essence_compression); } else if (track->parent.type == MXF_METADATA_TRACK_SOUND_ESSENCE) { if (MXF_IS_METADATA_GENERIC_SOUND_ESSENCE_DESCRIPTOR (track->parent. descriptor[0])) mxf_ul_to_string (&MXF_METADATA_GENERIC_SOUND_ESSENCE_DESCRIPTOR (track->parent.descriptor[0])->sound_essence_compression, essence_compression); name = g_strdup_printf ("audio/x-mxf-%s-%s", essence_container, essence_compression); } else if (track->parent.type == MXF_METADATA_TRACK_DATA_ESSENCE) { if (MXF_IS_METADATA_GENERIC_DATA_ESSENCE_DESCRIPTOR (track->parent. descriptor[0])) mxf_ul_to_string (&MXF_METADATA_GENERIC_DATA_ESSENCE_DESCRIPTOR (track->parent.descriptor[0])->data_essence_coding, essence_compression); name = g_strdup_printf ("application/x-mxf-%s-%s", essence_container, essence_compression); } else { name = NULL; g_assert_not_reached (); } caps = gst_caps_new_empty_simple (name); g_free (name); } else { caps = etrack->handler->create_caps (track, &etrack->tags, &etrack->handle_func, &etrack->mapping_data); } GST_DEBUG_OBJECT (demux, "Created caps %" GST_PTR_FORMAT, caps); if (!caps && new) { GST_WARNING_OBJECT (demux, "No caps created, ignoring stream"); g_free (etrack->mapping_data); etrack->mapping_data = NULL; if (etrack->tags) gst_tag_list_unref (etrack->tags); goto next; } else if (!caps) { GST_WARNING_OBJECT (demux, "Couldn't create updated caps for stream"); } else if (!etrack->caps || !gst_caps_is_equal (etrack->caps, caps)) { if (etrack->caps) gst_caps_unref (etrack->caps); etrack->caps = caps; } else { gst_caps_unref (caps); caps = NULL; } if (etrack->handler != NULL) { MXFEssenceWrapping track_wrapping; track_wrapping = etrack->handler->get_track_wrapping (track); if (track_wrapping == MXF_ESSENCE_WRAPPING_CLIP_WRAPPING) { GST_ELEMENT_ERROR (demux, STREAM, NOT_IMPLEMENTED, (NULL), ("Clip essence wrapping is not implemented yet.")); return GST_FLOW_ERROR; } else if (track_wrapping == MXF_ESSENCE_WRAPPING_CUSTOM_WRAPPING) { GST_ELEMENT_ERROR (demux, STREAM, NOT_IMPLEMENTED, (NULL), ("Custom essence wrappings are not supported.")); return GST_FLOW_ERROR; } } etrack->source_package = package; etrack->source_track = track; continue; next: if (new) { g_free (etrack->mapping_data); if (etrack->tags) gst_tag_list_unref (etrack->tags); if (etrack->caps) gst_caps_unref (etrack->caps); g_array_remove_index (demux->essence_tracks, demux->essence_tracks->len - 1); } } } if (demux->essence_tracks->len == 0) { GST_ERROR_OBJECT (demux, "No valid essence tracks in this file"); return GST_FLOW_ERROR; } for (i = 0; i < demux->essence_tracks->len; i++) { GstMXFDemuxEssenceTrack *etrack = &g_array_index (demux->essence_tracks, GstMXFDemuxEssenceTrack, i); if (!etrack->source_package || !etrack->source_track || !etrack->caps) { GST_ERROR_OBJECT (demux, "Failed to update essence track %u", i); return GST_FLOW_ERROR; } } return GST_FLOW_OK; } static GstFlowReturn gst_mxf_demux_update_tracks (GstMXFDemux * demux) { MXFMetadataGenericPackage *current_package = NULL; guint i, j, k; gboolean first_run; guint component_index; GstFlowReturn ret; GList *pads = NULL, *l; g_rw_lock_writer_lock (&demux->metadata_lock); GST_DEBUG_OBJECT (demux, "Updating tracks"); if ((ret = gst_mxf_demux_update_essence_tracks (demux)) != GST_FLOW_OK) { goto error; } current_package = gst_mxf_demux_choose_package (demux); if (!current_package) { GST_ERROR_OBJECT (demux, "Unable to find current package"); ret = GST_FLOW_ERROR; goto error; } else if (!current_package->tracks) { GST_ERROR_OBJECT (demux, "Current package has no (resolved) tracks"); ret = GST_FLOW_ERROR; goto error; } else if (!current_package->n_essence_tracks) { GST_ERROR_OBJECT (demux, "Current package has no essence tracks"); ret = GST_FLOW_ERROR; goto error; } first_run = (demux->src->len == 0); for (i = 0; i < current_package->n_tracks; i++) { MXFMetadataTimelineTrack *track = NULL; MXFMetadataSequence *sequence; MXFMetadataSourceClip *component = NULL; MXFMetadataSourcePackage *source_package = NULL; MXFMetadataTimelineTrack *source_track = NULL; GstMXFDemuxEssenceTrack *etrack = NULL; GstMXFDemuxPad *pad = NULL; GstCaps *pad_caps; GST_DEBUG_OBJECT (demux, "Handling track %u", i); if (!current_package->tracks[i]) { GST_WARNING_OBJECT (demux, "Unresolved track"); continue; } if (!MXF_IS_METADATA_TIMELINE_TRACK (current_package->tracks[i])) { GST_DEBUG_OBJECT (demux, "No timeline track"); continue; } track = MXF_METADATA_TIMELINE_TRACK (current_package->tracks[i]); if (!first_run) { /* Find pad from track_id */ for (j = 0; j < demux->src->len; j++) { GstMXFDemuxPad *tmp = g_ptr_array_index (demux->src, j); if (tmp->track_id == track->parent.track_id) { pad = tmp; break; } } } if (pad) component_index = pad->current_component_index; else component_index = 0; if (!track->parent.sequence) { GST_WARNING_OBJECT (demux, "Track with no sequence"); if (!pad) { continue; } else { ret = GST_FLOW_ERROR; goto error; } } sequence = track->parent.sequence; if (MXF_IS_METADATA_SOURCE_PACKAGE (current_package)) { GST_DEBUG_OBJECT (demux, "Playing source package"); component = NULL; source_package = MXF_METADATA_SOURCE_PACKAGE (current_package); source_track = track; } else if (sequence->structural_components && MXF_IS_METADATA_SOURCE_CLIP (sequence->structural_components [component_index])) { GST_DEBUG_OBJECT (demux, "Playing material package"); component = MXF_METADATA_SOURCE_CLIP (sequence->structural_components [component_index]); if (!component) { GST_WARNING_OBJECT (demux, "NULL conponent in non source package"); if (!pad) { continue; } else { ret = GST_FLOW_ERROR; goto error; } } if (component->source_package && component->source_package->top_level && MXF_METADATA_GENERIC_PACKAGE (component->source_package)->tracks) { MXFMetadataGenericPackage *tmp_pkg = MXF_METADATA_GENERIC_PACKAGE (component->source_package); source_package = component->source_package; for (k = 0; k < tmp_pkg->n_tracks; k++) { MXFMetadataTrack *tmp = tmp_pkg->tracks[k]; if (tmp->track_id == component->source_track_id) { source_track = MXF_METADATA_TIMELINE_TRACK (tmp); break; } } } } if (track->parent.type && (track->parent.type & 0xf0) != 0x30) { GST_DEBUG_OBJECT (demux, "No essence track"); if (!pad) { continue; } else { ret = GST_FLOW_ERROR; goto error; } } if (!source_package || track->parent.type == MXF_METADATA_TRACK_UNKNOWN || !source_track) { GST_WARNING_OBJECT (demux, "No source package or track type for track found"); if (!pad) { continue; } else { ret = GST_FLOW_ERROR; goto error; } } for (k = 0; k < demux->essence_tracks->len; k++) { GstMXFDemuxEssenceTrack *tmp = &g_array_index (demux->essence_tracks, GstMXFDemuxEssenceTrack, k); if (tmp->source_package == source_package && tmp->source_track == source_track) { etrack = tmp; break; } } if (!etrack) { GST_WARNING_OBJECT (demux, "No essence track for this track found"); if (!pad) { continue; } else { ret = GST_FLOW_ERROR; goto error; } } if (track->edit_rate.n <= 0 || track->edit_rate.d <= 0 || source_track->edit_rate.n <= 0 || source_track->edit_rate.d <= 0) { GST_WARNING_OBJECT (demux, "Track has an invalid edit rate"); if (!pad) { continue; } else { ret = GST_FLOW_ERROR; goto error; } } if (MXF_IS_METADATA_MATERIAL_PACKAGE (current_package) && !component) { GST_WARNING_OBJECT (demux, "Playing material package but found no component for track"); if (!pad) { continue; } else { ret = GST_FLOW_ERROR; goto error; } } if (!source_package->descriptor) { GST_WARNING_OBJECT (demux, "Source package has no descriptors"); if (!pad) { continue; } else { ret = GST_FLOW_ERROR; goto error; } } if (!source_track->parent.descriptor) { GST_WARNING_OBJECT (demux, "No descriptor found for track"); if (!pad) { continue; } else { ret = GST_FLOW_ERROR; goto error; } } if (!pad && first_run) { GstPadTemplate *templ; gchar *pad_name; templ = gst_element_class_get_pad_template (GST_ELEMENT_GET_CLASS (demux), "track_%u"); pad_name = g_strdup_printf ("track_%u", track->parent.track_id); g_assert (templ != NULL); /* Create pad */ pad = (GstMXFDemuxPad *) g_object_new (GST_TYPE_MXF_DEMUX_PAD, "name", pad_name, "direction", GST_PAD_SRC, "template", templ, NULL); pad->need_segment = TRUE; pad->eos = FALSE; g_free (pad_name); if (demux->tags) pad->tags = gst_tag_list_copy (demux->tags); } if (!pad) { GST_WARNING_OBJECT (demux, "Not the first pad addition run, ignoring new track"); continue; } /* Update pad */ pad->track_id = track->parent.track_id; pad->material_package = current_package; pad->material_track = track; /* If we just added the pad initialize for the current component */ if (first_run && MXF_IS_METADATA_MATERIAL_PACKAGE (current_package)) { pad->current_component_index = 0; pad->current_component_start = source_track->origin; if (component->parent.duration >= -1) pad->current_component_duration = component->parent.duration; else pad->current_component_duration = -1; if (track->edit_rate.n != source_track->edit_rate.n || track->edit_rate.d != source_track->edit_rate.d) { pad->current_component_start += gst_util_uint64_scale (component->start_position, source_track->edit_rate.n * track->edit_rate.d, source_track->edit_rate.d * track->edit_rate.n); if (pad->current_component_duration != -1) pad->current_component_duration = gst_util_uint64_scale (pad->current_component_duration, source_track->edit_rate.n * track->edit_rate.d, source_track->edit_rate.d * track->edit_rate.n); } else { pad->current_component_start += component->start_position; } pad->current_essence_track_position = pad->current_component_start; } /* NULL iff playing a source package */ pad->current_component = component; pad->current_essence_track = etrack; if (etrack->tags) { if (pad->tags) gst_tag_list_insert (pad->tags, etrack->tags, GST_TAG_MERGE_REPLACE); else pad->tags = gst_tag_list_copy (etrack->tags); } pad_caps = gst_pad_get_current_caps (GST_PAD_CAST (pad)); if (pad_caps && !gst_caps_is_equal (pad_caps, etrack->caps)) { gst_pad_set_caps (GST_PAD_CAST (pad), etrack->caps); } else if (!pad_caps) { GstEvent *event; gchar *stream_id; gst_pad_set_event_function (GST_PAD_CAST (pad), GST_DEBUG_FUNCPTR (gst_mxf_demux_src_event)); gst_pad_set_query_function (GST_PAD_CAST (pad), GST_DEBUG_FUNCPTR (gst_mxf_demux_src_query)); gst_pad_use_fixed_caps (GST_PAD_CAST (pad)); gst_pad_set_active (GST_PAD_CAST (pad), TRUE); stream_id = gst_pad_create_stream_id_printf (GST_PAD_CAST (pad), GST_ELEMENT_CAST (demux), "%03u", pad->track_id); event = gst_pad_get_sticky_event (demux->sinkpad, GST_EVENT_STREAM_START, 0); if (event) { if (gst_event_parse_group_id (event, &demux->group_id)) demux->have_group_id = TRUE; else demux->have_group_id = FALSE; gst_event_unref (event); } else if (!demux->have_group_id) { demux->have_group_id = TRUE; demux->group_id = gst_util_group_id_next (); } event = gst_event_new_stream_start (stream_id); if (demux->have_group_id) gst_event_set_group_id (event, demux->group_id); gst_pad_push_event (GST_PAD_CAST (pad), event); g_free (stream_id); gst_pad_set_caps (GST_PAD_CAST (pad), etrack->caps); pads = g_list_prepend (pads, gst_object_ref (pad)); g_ptr_array_add (demux->src, pad); pad->discont = TRUE; } if (pad_caps) gst_caps_unref (pad_caps); } if (demux->src->len > 0) { for (i = 0; i < demux->src->len; i++) { GstMXFDemuxPad *pad = g_ptr_array_index (demux->src, i); if (!pad->material_track || !pad->material_package) { GST_ERROR_OBJECT (demux, "Unable to update existing pad"); ret = GST_FLOW_ERROR; goto error; } } } else { GST_ERROR_OBJECT (demux, "Couldn't create any streams"); ret = GST_FLOW_ERROR; goto error; } g_rw_lock_writer_unlock (&demux->metadata_lock); for (l = pads; l; l = l->next) { gst_flow_combiner_add_pad (demux->flowcombiner, l->data); gst_element_add_pad (GST_ELEMENT_CAST (demux), l->data); } g_list_free (pads); if (first_run) gst_element_no_more_pads (GST_ELEMENT_CAST (demux)); return GST_FLOW_OK; error: g_rw_lock_writer_unlock (&demux->metadata_lock); return ret; } static GstFlowReturn gst_mxf_demux_handle_metadata (GstMXFDemux * demux, const MXFUL * key, GstBuffer * buffer) { guint16 type; MXFMetadata *metadata = NULL, *old = NULL; GstMapInfo map; GstFlowReturn ret = GST_FLOW_OK; type = GST_READ_UINT16_BE (key->u + 13); GST_DEBUG_OBJECT (demux, "Handling metadata of size %" G_GSIZE_FORMAT " at offset %" G_GUINT64_FORMAT " of type 0x%04x", gst_buffer_get_size (buffer), demux->offset, type); if (G_UNLIKELY (!demux->current_partition)) { GST_ERROR_OBJECT (demux, "Partition pack doesn't exist"); return GST_FLOW_ERROR; } if (G_UNLIKELY (!demux->current_partition->primer.mappings)) { GST_ERROR_OBJECT (demux, "Primer pack doesn't exists"); return GST_FLOW_ERROR; } if (demux->current_partition->parsed_metadata) { GST_DEBUG_OBJECT (demux, "Metadata of this partition was already parsed"); return GST_FLOW_OK; } gst_buffer_map (buffer, &map, GST_MAP_READ); metadata = mxf_metadata_new (type, &demux->current_partition->primer, demux->offset, map.data, map.size); gst_buffer_unmap (buffer, &map); if (!metadata) { GST_WARNING_OBJECT (demux, "Unknown or unhandled metadata of type 0x%04x", type); return GST_FLOW_OK; } old = g_hash_table_lookup (demux->metadata, &MXF_METADATA_BASE (metadata)->instance_uid); if (old && G_TYPE_FROM_INSTANCE (old) != G_TYPE_FROM_INSTANCE (metadata)) { #ifndef GST_DISABLE_GST_DEBUG gchar str[48]; #endif GST_DEBUG_OBJECT (demux, "Metadata with instance uid %s already exists and has different type '%s'," " expected '%s'", mxf_uuid_to_string (&MXF_METADATA_BASE (metadata)->instance_uid, str), g_type_name (G_TYPE_FROM_INSTANCE (old)), g_type_name (G_TYPE_FROM_INSTANCE (metadata))); g_object_unref (metadata); return GST_FLOW_ERROR; } else if (old && MXF_METADATA_BASE (old)->offset >= MXF_METADATA_BASE (metadata)->offset) { #ifndef GST_DISABLE_GST_DEBUG gchar str[48]; #endif GST_DEBUG_OBJECT (demux, "Metadata with instance uid %s already exists and is newer", mxf_uuid_to_string (&MXF_METADATA_BASE (metadata)->instance_uid, str)); g_object_unref (metadata); return GST_FLOW_OK; } g_rw_lock_writer_lock (&demux->metadata_lock); demux->update_metadata = TRUE; if (MXF_IS_METADATA_PREFACE (metadata)) { demux->preface = MXF_METADATA_PREFACE (metadata); } gst_mxf_demux_reset_linked_metadata (demux); g_hash_table_replace (demux->metadata, &MXF_METADATA_BASE (metadata)->instance_uid, metadata); g_rw_lock_writer_unlock (&demux->metadata_lock); return ret; } static GstFlowReturn gst_mxf_demux_handle_descriptive_metadata (GstMXFDemux * demux, const MXFUL * key, GstBuffer * buffer) { guint32 type; guint8 scheme; GstMapInfo map; GstFlowReturn ret = GST_FLOW_OK; MXFDescriptiveMetadata *m = NULL, *old = NULL; scheme = GST_READ_UINT8 (key->u + 12); type = GST_READ_UINT24_BE (key->u + 13); GST_DEBUG_OBJECT (demux, "Handling descriptive metadata of size %" G_GSIZE_FORMAT " at offset %" G_GUINT64_FORMAT " with scheme 0x%02x and type 0x%06x", gst_buffer_get_size (buffer), demux->offset, scheme, type); if (G_UNLIKELY (!demux->current_partition)) { GST_ERROR_OBJECT (demux, "Partition pack doesn't exist"); return GST_FLOW_ERROR; } if (G_UNLIKELY (!demux->current_partition->primer.mappings)) { GST_ERROR_OBJECT (demux, "Primer pack doesn't exists"); return GST_FLOW_ERROR; } if (demux->current_partition->parsed_metadata) { GST_DEBUG_OBJECT (demux, "Metadata of this partition was already parsed"); return GST_FLOW_OK; } gst_buffer_map (buffer, &map, GST_MAP_READ); m = mxf_descriptive_metadata_new (scheme, type, &demux->current_partition->primer, demux->offset, map.data, map.size); gst_buffer_unmap (buffer, &map); if (!m) { GST_WARNING_OBJECT (demux, "Unknown or unhandled descriptive metadata of scheme 0x%02x and type 0x%06x", scheme, type); return GST_FLOW_OK; } old = g_hash_table_lookup (demux->metadata, &MXF_METADATA_BASE (m)->instance_uid); if (old && G_TYPE_FROM_INSTANCE (old) != G_TYPE_FROM_INSTANCE (m)) { #ifndef GST_DISABLE_GST_DEBUG gchar str[48]; #endif GST_DEBUG_OBJECT (demux, "Metadata with instance uid %s already exists and has different type '%s'," " expected '%s'", mxf_uuid_to_string (&MXF_METADATA_BASE (m)->instance_uid, str), g_type_name (G_TYPE_FROM_INSTANCE (old)), g_type_name (G_TYPE_FROM_INSTANCE (m))); g_object_unref (m); return GST_FLOW_ERROR; } else if (old && MXF_METADATA_BASE (old)->offset >= MXF_METADATA_BASE (m)->offset) { #ifndef GST_DISABLE_GST_DEBUG gchar str[48]; #endif GST_DEBUG_OBJECT (demux, "Metadata with instance uid %s already exists and is newer", mxf_uuid_to_string (&MXF_METADATA_BASE (m)->instance_uid, str)); g_object_unref (m); return GST_FLOW_OK; } g_rw_lock_writer_lock (&demux->metadata_lock); demux->update_metadata = TRUE; gst_mxf_demux_reset_linked_metadata (demux); g_hash_table_replace (demux->metadata, &MXF_METADATA_BASE (m)->instance_uid, m); g_rw_lock_writer_unlock (&demux->metadata_lock); return ret; } static GstFlowReturn gst_mxf_demux_handle_generic_container_system_item (GstMXFDemux * demux, const MXFUL * key, GstBuffer * buffer) { GST_DEBUG_OBJECT (demux, "Handling generic container system item of size %" G_GSIZE_FORMAT " at offset %" G_GUINT64_FORMAT, gst_buffer_get_size (buffer), demux->offset); if (demux->current_partition->essence_container_offset == 0) demux->current_partition->essence_container_offset = demux->offset - demux->current_partition->partition.this_partition - demux->run_in; /* TODO: parse this */ return GST_FLOW_OK; } static GstFlowReturn gst_mxf_demux_pad_set_component (GstMXFDemux * demux, GstMXFDemuxPad * pad, guint i) { GstFlowReturn ret = GST_FLOW_OK; GstCaps *pad_caps; MXFMetadataSequence *sequence; guint k; MXFMetadataSourcePackage *source_package = NULL; MXFMetadataTimelineTrack *source_track = NULL; gboolean update = (pad->current_component_index != i); pad->current_component_index = i; sequence = pad->material_track->parent.sequence; if (pad->current_component_index >= sequence->n_structural_components) { GST_DEBUG_OBJECT (demux, "After last structural component"); pad->current_component_index = sequence->n_structural_components - 1; ret = GST_FLOW_EOS; } GST_DEBUG_OBJECT (demux, "Switching to component %u", pad->current_component_index); pad->current_component = MXF_METADATA_SOURCE_CLIP (sequence->structural_components[pad-> current_component_index]); if (pad->current_component == NULL) { GST_ERROR_OBJECT (demux, "No such structural component"); return GST_FLOW_ERROR; } if (!pad->current_component->source_package || !pad->current_component->source_package->top_level || !MXF_METADATA_GENERIC_PACKAGE (pad->current_component-> source_package)->tracks) { GST_ERROR_OBJECT (demux, "Invalid component"); return GST_FLOW_ERROR; } source_package = pad->current_component->source_package; for (k = 0; k < source_package->parent.n_tracks; k++) { MXFMetadataTrack *tmp = source_package->parent.tracks[k]; if (tmp->track_id == pad->current_component->source_track_id) { source_track = MXF_METADATA_TIMELINE_TRACK (tmp); break; } } if (!source_track) { GST_ERROR_OBJECT (demux, "No source track found"); return GST_FLOW_ERROR; } pad->current_essence_track = NULL; for (k = 0; k < demux->essence_tracks->len; k++) { GstMXFDemuxEssenceTrack *tmp = &g_array_index (demux->essence_tracks, GstMXFDemuxEssenceTrack, k); if (tmp->source_package == source_package && tmp->source_track == source_track) { pad->current_essence_track = tmp; break; } } if (!pad->current_essence_track) { GST_ERROR_OBJECT (demux, "No corresponding essence track found"); return GST_FLOW_ERROR; } if (!source_package->descriptor) { GST_ERROR_OBJECT (demux, "Source package has no descriptors"); return GST_FLOW_ERROR; } if (!source_track->parent.descriptor) { GST_ERROR_OBJECT (demux, "No descriptor found for track"); return GST_FLOW_ERROR; } if (source_track->edit_rate.n <= 0 || source_track->edit_rate.d <= 0) { GST_ERROR_OBJECT (demux, "Source track has invalid edit rate"); return GST_FLOW_ERROR; } pad->current_component_start = source_track->origin; if (pad->current_component->parent.duration >= -1) pad->current_component_duration = pad->current_component->parent.duration; else pad->current_component_duration = -1; if (pad->material_track->edit_rate.n != source_track->edit_rate.n || pad->material_track->edit_rate.d != source_track->edit_rate.d) { pad->current_component_start += gst_util_uint64_scale (pad->current_component->start_position, source_track->edit_rate.n * pad->material_track->edit_rate.d, source_track->edit_rate.d * pad->material_track->edit_rate.n); if (pad->current_component_duration != -1) pad->current_component_duration = gst_util_uint64_scale (pad->current_component_duration, source_track->edit_rate.n * pad->material_track->edit_rate.d, source_track->edit_rate.d * pad->material_track->edit_rate.n); } else { pad->current_component_start += pad->current_component->start_position; } pad->current_essence_track_position = pad->current_component_start; pad_caps = gst_pad_get_current_caps (GST_PAD_CAST (pad)); if (!gst_caps_is_equal (pad_caps, pad->current_essence_track->caps)) { gst_pad_set_caps (GST_PAD_CAST (pad), pad->current_essence_track->caps); } gst_caps_unref (pad_caps); if (update) { if (pad->tags) { if (pad->current_essence_track->tags) gst_tag_list_insert (pad->tags, pad->current_essence_track->tags, GST_TAG_MERGE_REPLACE); } else { if (pad->current_essence_track->tags) pad->tags = gst_tag_list_copy (pad->current_essence_track->tags); } } if (ret == GST_FLOW_EOS) { pad->current_essence_track_position += pad->current_component_duration; } return ret; } static GstFlowReturn gst_mxf_demux_handle_generic_container_essence_element (GstMXFDemux * demux, const MXFUL * key, GstBuffer * buffer, gboolean peek) { GstFlowReturn ret = GST_FLOW_OK; guint32 track_number; guint i; GstBuffer *inbuf = NULL; GstBuffer *outbuf = NULL; GstMXFDemuxEssenceTrack *etrack = NULL; gboolean keyframe = TRUE; GST_DEBUG_OBJECT (demux, "Handling generic container essence element of size %" G_GSIZE_FORMAT " at offset %" G_GUINT64_FORMAT, gst_buffer_get_size (buffer), demux->offset); GST_DEBUG_OBJECT (demux, " type = 0x%02x", key->u[12]); GST_DEBUG_OBJECT (demux, " essence element count = 0x%02x", key->u[13]); GST_DEBUG_OBJECT (demux, " essence element type = 0x%02x", key->u[14]); GST_DEBUG_OBJECT (demux, " essence element number = 0x%02x", key->u[15]); if (demux->current_partition->essence_container_offset == 0) demux->current_partition->essence_container_offset = demux->offset - demux->current_partition->partition.this_partition - demux->run_in; if (!demux->current_package) { GST_ERROR_OBJECT (demux, "No package selected yet"); return GST_FLOW_ERROR; } if (demux->src->len == 0) { GST_ERROR_OBJECT (demux, "No streams created yet"); return GST_FLOW_ERROR; } if (demux->essence_tracks->len == 0) { GST_ERROR_OBJECT (demux, "No essence streams found in the metadata"); return GST_FLOW_ERROR; } track_number = GST_READ_UINT32_BE (&key->u[12]); for (i = 0; i < demux->essence_tracks->len; i++) { GstMXFDemuxEssenceTrack *tmp = &g_array_index (demux->essence_tracks, GstMXFDemuxEssenceTrack, i); if (tmp->body_sid == demux->current_partition->partition.body_sid && (tmp->track_number == track_number || tmp->track_number == 0)) { etrack = tmp; break; } } if (!etrack) { GST_WARNING_OBJECT (demux, "No essence track for this essence element found"); return GST_FLOW_OK; } if (etrack->position == -1) { GST_DEBUG_OBJECT (demux, "Unknown essence track position, looking into index"); if (etrack->offsets) { for (i = 0; i < etrack->offsets->len; i++) { GstMXFDemuxIndex *idx = &g_array_index (etrack->offsets, GstMXFDemuxIndex, i); if (idx->offset != 0 && idx->offset == demux->offset - demux->run_in) { etrack->position = i; break; } } } if (etrack->position == -1) { GST_WARNING_OBJECT (demux, "Essence track position not in index"); return GST_FLOW_OK; } } if (etrack->offsets && etrack->offsets->len > etrack->position) { keyframe = g_array_index (etrack->offsets, GstMXFDemuxIndex, etrack->position).keyframe; } /* Create subbuffer to be able to change metadata */ inbuf = gst_buffer_copy_region (buffer, GST_BUFFER_COPY_ALL, 0, gst_buffer_get_size (buffer)); if (!keyframe) GST_BUFFER_FLAG_SET (inbuf, GST_BUFFER_FLAG_DELTA_UNIT); if (etrack->handle_func) { /* Takes ownership of inbuf */ ret = etrack->handle_func (key, inbuf, etrack->caps, etrack->source_track, etrack->mapping_data, &outbuf); inbuf = NULL; } else { outbuf = inbuf; inbuf = NULL; ret = GST_FLOW_OK; } if (ret != GST_FLOW_OK) { GST_ERROR_OBJECT (demux, "Failed to handle essence element"); if (outbuf) { gst_buffer_unref (outbuf); outbuf = NULL; } return ret; } if (outbuf) keyframe = !GST_BUFFER_FLAG_IS_SET (outbuf, GST_BUFFER_FLAG_DELTA_UNIT); if (!etrack->offsets) etrack->offsets = g_array_new (FALSE, TRUE, sizeof (GstMXFDemuxIndex)); { if (etrack->offsets->len > etrack->position) { GstMXFDemuxIndex *index = &g_array_index (etrack->offsets, GstMXFDemuxIndex, etrack->position); index->offset = demux->offset - demux->run_in; index->keyframe = keyframe; } else { GstMXFDemuxIndex index; index.offset = demux->offset - demux->run_in; index.keyframe = keyframe; g_array_insert_val (etrack->offsets, etrack->position, index); } } if (peek) goto out; if (!outbuf) { GST_DEBUG_OBJECT (demux, "No output buffer created"); goto out; } inbuf = outbuf; outbuf = NULL; for (i = 0; i < demux->src->len; i++) { GstMXFDemuxPad *pad = g_ptr_array_index (demux->src, i); if (pad->current_essence_track != etrack) continue; if (pad->eos) { GST_DEBUG_OBJECT (demux, "Pad is already EOS"); continue; } if (etrack->position != pad->current_essence_track_position) { GST_DEBUG_OBJECT (demux, "Not at current component's position"); continue; } { GstMXFDemuxPad *earliest = gst_mxf_demux_get_earliest_pad (demux); if (earliest && earliest != pad && earliest->position < pad->position && pad->position - earliest->position > demux->max_drift) { GST_DEBUG_OBJECT (demux, "Pad is too far ahead of time"); continue; } } /* Create another subbuffer to have writable metadata */ outbuf = gst_buffer_copy_region (inbuf, GST_BUFFER_COPY_ALL, 0, gst_buffer_get_size (inbuf)); GST_BUFFER_DTS (outbuf) = pad->position; GST_BUFFER_PTS (outbuf) = pad->position; GST_BUFFER_DURATION (outbuf) = gst_util_uint64_scale (GST_SECOND, pad->current_essence_track->source_track->edit_rate.d, pad->current_essence_track->source_track->edit_rate.n); GST_BUFFER_OFFSET (outbuf) = GST_BUFFER_OFFSET_NONE; GST_BUFFER_OFFSET_END (outbuf) = GST_BUFFER_OFFSET_NONE; /* Update accumulated error and compensate */ { guint64 abs_error = (GST_SECOND * pad->current_essence_track->source_track->edit_rate.d) % pad->current_essence_track->source_track->edit_rate.n; pad->position_accumulated_error += ((gdouble) abs_error) / ((gdouble) pad->current_essence_track->source_track->edit_rate.n); } if (pad->position_accumulated_error >= 1.0) { GST_BUFFER_DURATION (outbuf) += 1; pad->position_accumulated_error -= 1.0; } if (pad->need_segment) { GstEvent *e; if (demux->close_seg_event) gst_pad_push_event (GST_PAD_CAST (pad), gst_event_ref (demux->close_seg_event)); e = gst_event_new_segment (&demux->segment); gst_event_set_seqnum (e, demux->seqnum); gst_pad_push_event (GST_PAD_CAST (pad), e); pad->need_segment = FALSE; } if (pad->tags) { gst_pad_push_event (GST_PAD_CAST (pad), gst_event_new_tag (pad->tags)); pad->tags = NULL; } pad->position += GST_BUFFER_DURATION (outbuf); GST_DEBUG_OBJECT (demux, "Pushing buffer of size %" G_GSIZE_FORMAT " for track %u: timestamp %" GST_TIME_FORMAT " duration %" GST_TIME_FORMAT, gst_buffer_get_size (outbuf), pad->material_track->parent.track_id, GST_TIME_ARGS (GST_BUFFER_TIMESTAMP (outbuf)), GST_TIME_ARGS (GST_BUFFER_DURATION (outbuf))); if (pad->discont) { GST_BUFFER_FLAG_SET (outbuf, GST_BUFFER_FLAG_DISCONT); pad->discont = FALSE; } ret = gst_pad_push (GST_PAD_CAST (pad), outbuf); outbuf = NULL; ret = gst_mxf_demux_combine_flows (demux, pad, ret); if (pad->position > demux->segment.position) demux->segment.position = pad->position; if (ret != GST_FLOW_OK) goto out; pad->current_essence_track_position++; if (pad->current_component) { if (pad->current_component_duration > 0 && pad->current_essence_track_position - pad->current_component_start >= pad->current_component_duration) { GST_DEBUG_OBJECT (demux, "Switching to next component"); ret = gst_mxf_demux_pad_set_component (demux, pad, pad->current_component_index + 1); if (ret != GST_FLOW_OK && ret != GST_FLOW_EOS) { GST_ERROR_OBJECT (demux, "Switching component failed"); } } else if (etrack->duration > 0 && pad->current_essence_track_position >= etrack->duration) { GST_DEBUG_OBJECT (demux, "Current component position after end of essence track"); ret = GST_FLOW_EOS; } } else if (etrack->duration > 0 && pad->current_essence_track_position == etrack->duration) { GST_DEBUG_OBJECT (demux, "At the end of the essence track"); ret = GST_FLOW_EOS; } if (ret == GST_FLOW_EOS) { GstEvent *e; GST_DEBUG_OBJECT (demux, "EOS for track"); pad->eos = TRUE; e = gst_event_new_eos (); gst_event_set_seqnum (e, demux->seqnum); gst_pad_push_event (GST_PAD_CAST (pad), e); ret = GST_FLOW_OK; } if (ret != GST_FLOW_OK) goto out; } out: if (inbuf) gst_buffer_unref (inbuf); if (outbuf) gst_buffer_unref (outbuf); etrack->position++; return ret; } static GstFlowReturn gst_mxf_demux_handle_random_index_pack (GstMXFDemux * demux, const MXFUL * key, GstBuffer * buffer) { guint i; GList *l; GstMapInfo map; gboolean ret; GST_DEBUG_OBJECT (demux, "Handling random index pack of size %" G_GSIZE_FORMAT " at offset %" G_GUINT64_FORMAT, gst_buffer_get_size (buffer), demux->offset); if (demux->random_index_pack) { GST_DEBUG_OBJECT (demux, "Already parsed random index pack"); return GST_FLOW_OK; } gst_buffer_map (buffer, &map, GST_MAP_READ); ret = mxf_random_index_pack_parse (key, map.data, map.size, &demux->random_index_pack); gst_buffer_unmap (buffer, &map); if (!ret) { GST_ERROR_OBJECT (demux, "Parsing random index pack failed"); return GST_FLOW_ERROR; } for (i = 0; i < demux->random_index_pack->len; i++) { GstMXFDemuxPartition *p = NULL; MXFRandomIndexPackEntry *e = &g_array_index (demux->random_index_pack, MXFRandomIndexPackEntry, i); if (e->offset < demux->run_in) { GST_ERROR_OBJECT (demux, "Invalid random index pack entry"); return GST_FLOW_ERROR; } for (l = demux->partitions; l; l = l->next) { GstMXFDemuxPartition *tmp = l->data; if (tmp->partition.this_partition + demux->run_in == e->offset) { p = tmp; break; } } if (!p) { p = g_new0 (GstMXFDemuxPartition, 1); p->partition.this_partition = e->offset - demux->run_in; p->partition.body_sid = e->body_sid; demux->partitions = g_list_insert_sorted (demux->partitions, p, (GCompareFunc) gst_mxf_demux_partition_compare); } } for (l = demux->partitions; l; l = l->next) { GstMXFDemuxPartition *a, *b; if (l->next == NULL) break; a = l->data; b = l->next->data; b->partition.prev_partition = a->partition.this_partition; } return GST_FLOW_OK; } static GstFlowReturn gst_mxf_demux_handle_index_table_segment (GstMXFDemux * demux, const MXFUL * key, GstBuffer * buffer) { MXFIndexTableSegment *segment; GstMapInfo map; gboolean ret; GST_DEBUG_OBJECT (demux, "Handling index table segment of size %" G_GSIZE_FORMAT " at offset %" G_GUINT64_FORMAT, gst_buffer_get_size (buffer), demux->offset); if (!demux->current_partition->primer.mappings) { GST_WARNING_OBJECT (demux, "Invalid primer pack"); } segment = g_new0 (MXFIndexTableSegment, 1); gst_buffer_map (buffer, &map, GST_MAP_READ); ret = mxf_index_table_segment_parse (key, segment, &demux->current_partition->primer, map.data, map.size); gst_buffer_unmap (buffer, &map); if (!ret) { GST_ERROR_OBJECT (demux, "Parsing index table segment failed"); return GST_FLOW_ERROR; } demux->pending_index_table_segments = g_list_prepend (demux->pending_index_table_segments, segment); return GST_FLOW_OK; } static GstFlowReturn gst_mxf_demux_pull_klv_packet (GstMXFDemux * demux, guint64 offset, MXFUL * key, GstBuffer ** outbuf, guint * read) { GstBuffer *buffer = NULL; const guint8 *data; guint64 data_offset = 0; guint64 length; GstFlowReturn ret = GST_FLOW_OK; GstMapInfo map; #ifndef GST_DISABLE_GST_DEBUG gchar str[48]; #endif memset (key, 0, sizeof (MXFUL)); /* Pull 16 byte key and first byte of BER encoded length */ if ((ret = gst_mxf_demux_pull_range (demux, offset, 17, &buffer)) != GST_FLOW_OK) goto beach; gst_buffer_map (buffer, &map, GST_MAP_READ); memcpy (key, map.data, 16); GST_DEBUG_OBJECT (demux, "Got KLV packet with key %s", mxf_ul_to_string (key, str)); /* Decode BER encoded packet length */ if ((map.data[16] & 0x80) == 0) { length = map.data[16]; data_offset = 17; } else { guint slen = map.data[16] & 0x7f; data_offset = 16 + 1 + slen; gst_buffer_unmap (buffer, &map); gst_buffer_unref (buffer); buffer = NULL; /* Must be at most 8 according to SMPTE-379M 5.3.4 */ if (slen > 8) { GST_ERROR_OBJECT (demux, "Invalid KLV packet length: %u", slen); ret = GST_FLOW_ERROR; goto beach; } /* Now pull the length of the packet */ if ((ret = gst_mxf_demux_pull_range (demux, offset + 17, slen, &buffer)) != GST_FLOW_OK) goto beach; gst_buffer_map (buffer, &map, GST_MAP_READ); data = map.data; length = 0; while (slen) { length = (length << 8) | *data; data++; slen--; } } gst_buffer_unmap (buffer, &map); gst_buffer_unref (buffer); buffer = NULL; /* GStreamer's buffer sizes are stored in a guint so we * limit ourself to G_MAXUINT large buffers */ if (length > G_MAXUINT) { GST_ERROR_OBJECT (demux, "Unsupported KLV packet length: %" G_GUINT64_FORMAT, length); ret = GST_FLOW_ERROR; goto beach; } GST_DEBUG_OBJECT (demux, "KLV packet with key %s has length " "%" G_GUINT64_FORMAT, mxf_ul_to_string (key, str), length); /* Pull the complete KLV packet */ if ((ret = gst_mxf_demux_pull_range (demux, offset + data_offset, length, &buffer)) != GST_FLOW_OK) goto beach; *outbuf = buffer; buffer = NULL; if (read) *read = data_offset + length; beach: if (buffer) gst_buffer_unref (buffer); return ret; } static void gst_mxf_demux_pull_random_index_pack (GstMXFDemux * demux) { GstBuffer *buffer; GstFlowReturn ret; gint64 filesize = -1; GstFormat fmt = GST_FORMAT_BYTES; guint32 pack_size; guint64 old_offset = demux->offset; MXFUL key; GstMapInfo map; if (!gst_pad_peer_query_duration (demux->sinkpad, fmt, &filesize) || fmt != GST_FORMAT_BYTES || filesize == -1) { GST_DEBUG_OBJECT (demux, "Can't query upstream size"); return; } g_assert (filesize > 4); buffer = NULL; if ((ret = gst_mxf_demux_pull_range (demux, filesize - 4, 4, &buffer)) != GST_FLOW_OK) { GST_DEBUG_OBJECT (demux, "Failed pulling last 4 bytes"); return; } gst_buffer_map (buffer, &map, GST_MAP_READ); pack_size = GST_READ_UINT32_BE (map.data); gst_buffer_unmap (buffer, &map); gst_buffer_unref (buffer); if (pack_size < 20) { GST_DEBUG_OBJECT (demux, "Too small pack size (%u bytes)", pack_size); return; } else if (pack_size > filesize - 20) { GST_DEBUG_OBJECT (demux, "Too large pack size (%u bytes)", pack_size); return; } buffer = NULL; if ((ret = gst_mxf_demux_pull_range (demux, filesize - pack_size, 16, &buffer)) != GST_FLOW_OK) { GST_DEBUG_OBJECT (demux, "Failed pulling random index pack key"); return; } gst_buffer_map (buffer, &map, GST_MAP_READ); memcpy (&key, map.data, 16); gst_buffer_unmap (buffer, &map); gst_buffer_unref (buffer); if (!mxf_is_random_index_pack (&key)) { GST_DEBUG_OBJECT (demux, "No random index pack"); return; } demux->offset = filesize - pack_size; if ((ret = gst_mxf_demux_pull_klv_packet (demux, filesize - pack_size, &key, &buffer, NULL)) != GST_FLOW_OK) { GST_DEBUG_OBJECT (demux, "Failed pulling random index pack"); return; } gst_mxf_demux_handle_random_index_pack (demux, &key, buffer); gst_buffer_unref (buffer); demux->offset = old_offset; } static void gst_mxf_demux_parse_footer_metadata (GstMXFDemux * demux) { guint64 old_offset = demux->offset; MXFUL key; GstBuffer *buffer = NULL; guint read = 0; GstFlowReturn ret = GST_FLOW_OK; GstMXFDemuxPartition *old_partition = demux->current_partition; demux->current_partition = NULL; gst_mxf_demux_reset_metadata (demux); if (demux->footer_partition_pack_offset != 0) { demux->offset = demux->run_in + demux->footer_partition_pack_offset; } else { MXFRandomIndexPackEntry *entry = &g_array_index (demux->random_index_pack, MXFRandomIndexPackEntry, demux->random_index_pack->len - 1); demux->offset = entry->offset; } next_try: ret = gst_mxf_demux_pull_klv_packet (demux, demux->offset, &key, &buffer, &read); if (G_UNLIKELY (ret != GST_FLOW_OK)) goto out; if (!mxf_is_partition_pack (&key)) goto out; if (gst_mxf_demux_handle_partition_pack (demux, &key, buffer) != GST_FLOW_OK) goto out; demux->offset += read; gst_buffer_unref (buffer); buffer = NULL; if (demux->current_partition->partition.header_byte_count == 0) { if (demux->current_partition->partition.prev_partition == 0 || demux->current_partition->partition.this_partition == 0) goto out; demux->offset = demux->run_in + demux->current_partition->partition.this_partition - demux->current_partition->partition.prev_partition; goto next_try; } while (TRUE) { ret = gst_mxf_demux_pull_klv_packet (demux, demux->offset, &key, &buffer, &read); if (G_UNLIKELY (ret != GST_FLOW_OK)) { demux->offset = demux->run_in + demux->current_partition->partition.this_partition - demux->current_partition->partition.prev_partition; goto next_try; } if (mxf_is_fill (&key)) { demux->offset += read; gst_buffer_unref (buffer); buffer = NULL; } else if (mxf_is_primer_pack (&key)) { if (!demux->current_partition->primer.mappings) { if (gst_mxf_demux_handle_primer_pack (demux, &key, buffer) != GST_FLOW_OK) { demux->offset += read; gst_buffer_unref (buffer); buffer = NULL; demux->offset = demux->run_in + demux->current_partition->partition.this_partition - demux->current_partition->partition.prev_partition; goto next_try; } } demux->offset += read; gst_buffer_unref (buffer); buffer = NULL; break; } else { gst_buffer_unref (buffer); buffer = NULL; demux->offset = demux->run_in + demux->current_partition->partition.this_partition - demux->current_partition->partition.prev_partition; goto next_try; } } /* parse metadata */ while (demux->offset < demux->run_in + demux->current_partition->primer.offset + demux->current_partition->partition.header_byte_count) { ret = gst_mxf_demux_pull_klv_packet (demux, demux->offset, &key, &buffer, &read); if (G_UNLIKELY (ret != GST_FLOW_OK)) { demux->offset = demux->run_in + demux->current_partition->partition.this_partition - demux->current_partition->partition.prev_partition; goto next_try; } if (mxf_is_metadata (&key)) { ret = gst_mxf_demux_handle_metadata (demux, &key, buffer); demux->offset += read; gst_buffer_unref (buffer); buffer = NULL; if (G_UNLIKELY (ret != GST_FLOW_OK)) { gst_mxf_demux_reset_metadata (demux); demux->offset = demux->run_in + demux->current_partition->partition.this_partition - demux->current_partition->partition.prev_partition; goto next_try; } } else if (mxf_is_descriptive_metadata (&key)) { ret = gst_mxf_demux_handle_descriptive_metadata (demux, &key, buffer); demux->offset += read; gst_buffer_unref (buffer); buffer = NULL; } else if (mxf_is_fill (&key)) { demux->offset += read; gst_buffer_unref (buffer); buffer = NULL; } else if (mxf_is_generic_container_system_item (&key) || mxf_is_generic_container_essence_element (&key) || mxf_is_avid_essence_container_essence_element (&key)) { demux->offset += read; gst_buffer_unref (buffer); buffer = NULL; break; } else { demux->offset += read; gst_buffer_unref (buffer); buffer = NULL; } } /* resolve references etc */ if (gst_mxf_demux_resolve_references (demux) != GST_FLOW_OK || gst_mxf_demux_update_tracks (demux) != GST_FLOW_OK) { demux->current_partition->parsed_metadata = TRUE; demux->offset = demux->run_in + demux->current_partition->partition.this_partition - demux->current_partition->partition.prev_partition; goto next_try; } out: if (buffer) gst_buffer_unref (buffer); demux->offset = old_offset; demux->current_partition = old_partition; } static GstFlowReturn gst_mxf_demux_handle_klv_packet (GstMXFDemux * demux, const MXFUL * key, GstBuffer * buffer, gboolean peek) { #ifndef GST_DISABLE_GST_DEBUG gchar key_str[48]; #endif GstFlowReturn ret = GST_FLOW_OK; if (demux->update_metadata && demux->preface && (demux->offset >= demux->run_in + demux->current_partition->primer.offset + demux->current_partition->partition.header_byte_count || mxf_is_generic_container_system_item (key) || mxf_is_generic_container_essence_element (key) || mxf_is_avid_essence_container_essence_element (key))) { demux->current_partition->parsed_metadata = TRUE; if ((ret = gst_mxf_demux_resolve_references (demux)) != GST_FLOW_OK || (ret = gst_mxf_demux_update_tracks (demux)) != GST_FLOW_OK) { goto beach; } } else if (demux->metadata_resolved && demux->requested_package_string) { if ((ret = gst_mxf_demux_update_tracks (demux)) != GST_FLOW_OK) { goto beach; } } if (!mxf_is_mxf_packet (key)) { GST_WARNING_OBJECT (demux, "Skipping non-MXF packet of size %" G_GSIZE_FORMAT " at offset %" G_GUINT64_FORMAT ", key: %s", gst_buffer_get_size (buffer), demux->offset, mxf_ul_to_string (key, key_str)); } else if (mxf_is_partition_pack (key)) { ret = gst_mxf_demux_handle_partition_pack (demux, key, buffer); /* If this partition contains the start of an essence container * set the positions of all essence streams to 0 */ if (ret == GST_FLOW_OK && demux->current_partition && demux->current_partition->partition.body_sid != 0 && demux->current_partition->partition.body_offset == 0) { guint i; for (i = 0; i < demux->essence_tracks->len; i++) { GstMXFDemuxEssenceTrack *etrack = &g_array_index (demux->essence_tracks, GstMXFDemuxEssenceTrack, i); if (etrack->body_sid != demux->current_partition->partition.body_sid) continue; etrack->position = 0; } } } else if (mxf_is_primer_pack (key)) { ret = gst_mxf_demux_handle_primer_pack (demux, key, buffer); } else if (mxf_is_metadata (key)) { ret = gst_mxf_demux_handle_metadata (demux, key, buffer); } else if (mxf_is_descriptive_metadata (key)) { ret = gst_mxf_demux_handle_descriptive_metadata (demux, key, buffer); } else if (mxf_is_generic_container_system_item (key)) { ret = gst_mxf_demux_handle_generic_container_system_item (demux, key, buffer); } else if (mxf_is_generic_container_essence_element (key) || mxf_is_avid_essence_container_essence_element (key)) { ret = gst_mxf_demux_handle_generic_container_essence_element (demux, key, buffer, peek); } else if (mxf_is_random_index_pack (key)) { ret = gst_mxf_demux_handle_random_index_pack (demux, key, buffer); } else if (mxf_is_index_table_segment (key)) { ret = gst_mxf_demux_handle_index_table_segment (demux, key, buffer); } else if (mxf_is_fill (key)) { GST_DEBUG_OBJECT (demux, "Skipping filler packet of size %" G_GSIZE_FORMAT " at offset %" G_GUINT64_FORMAT, gst_buffer_get_size (buffer), demux->offset); } else { GST_DEBUG_OBJECT (demux, "Skipping unknown packet of size %" G_GSIZE_FORMAT " at offset %" G_GUINT64_FORMAT ", key: %s", gst_buffer_get_size (buffer), demux->offset, mxf_ul_to_string (key, key_str)); } /* In pull mode try to get the last metadata */ if (mxf_is_partition_pack (key) && ret == GST_FLOW_OK && demux->pull_footer_metadata && demux->random_access && demux->current_partition && demux->current_partition->partition.type == MXF_PARTITION_PACK_HEADER && (!demux->current_partition->partition.closed || !demux->current_partition->partition.complete) && (demux->footer_partition_pack_offset != 0 || demux->random_index_pack)) { GST_DEBUG_OBJECT (demux, "Open or incomplete header partition, trying to get final metadata from the last partitions"); gst_mxf_demux_parse_footer_metadata (demux); demux->pull_footer_metadata = FALSE; if (demux->current_partition->partition.body_sid != 0 && demux->current_partition->partition.body_offset == 0) { guint i; for (i = 0; i < demux->essence_tracks->len; i++) { GstMXFDemuxEssenceTrack *etrack = &g_array_index (demux->essence_tracks, GstMXFDemuxEssenceTrack, i); if (etrack->body_sid != demux->current_partition->partition.body_sid) continue; etrack->position = 0; } } } beach: return ret; } static void gst_mxf_demux_set_partition_for_offset (GstMXFDemux * demux, guint64 offset) { GList *l; /* This partition will already be parsed, otherwise * the position wouldn't be in the index */ for (l = demux->partitions; l; l = l->next) { GstMXFDemuxPartition *p = l->data; if (p->partition.this_partition + demux->run_in <= offset) demux->current_partition = p; } } static guint64 gst_mxf_demux_find_essence_element (GstMXFDemux * demux, GstMXFDemuxEssenceTrack * etrack, gint64 * position, gboolean keyframe) { GstFlowReturn ret = GST_FLOW_OK; guint64 old_offset = demux->offset; GstMXFDemuxPartition *old_partition = demux->current_partition; gint i; GST_DEBUG_OBJECT (demux, "Trying to find essence element %" G_GINT64_FORMAT " of track %u with body_sid %u (keyframe %d)", *position, etrack->track_number, etrack->body_sid, keyframe); from_index: if (etrack->duration > 0 && *position >= etrack->duration) { GST_WARNING_OBJECT (demux, "Position after end of essence track"); return -1; } /* First try to find an offset in our index */ if (etrack->offsets && etrack->offsets->len > *position) { GstMXFDemuxIndex *idx = &g_array_index (etrack->offsets, GstMXFDemuxIndex, *position); guint64 current_offset = -1; gint64 current_position = *position; if (idx->offset != 0 && (!keyframe || idx->keyframe)) { current_offset = idx->offset; } else if (idx->offset != 0) { current_position--; while (current_position >= 0) { idx = &g_array_index (etrack->offsets, GstMXFDemuxIndex, current_position); if (idx->offset == 0) { break; } else if (!idx->keyframe) { current_position--; continue; } else { current_offset = idx->offset; break; } } } if (current_offset != -1) { GST_DEBUG_OBJECT (demux, "Found in index at offset %" G_GUINT64_FORMAT, current_offset); *position = current_position; return current_offset; } } GST_DEBUG_OBJECT (demux, "Not found in index"); if (!demux->random_access) { guint64 new_offset = -1; gint64 new_position = -1; if (etrack->offsets && etrack->offsets->len) { for (i = etrack->offsets->len - 1; i >= 0; i--) { GstMXFDemuxIndex *idx = &g_array_index (etrack->offsets, GstMXFDemuxIndex, i); if (idx->offset != 0 && i <= *position && (!keyframe || idx->keyframe)) { new_offset = idx->offset; new_position = i; break; } } } if (new_offset != -1) { *position = new_position; return new_offset; } } else if (demux->random_access) { demux->offset = demux->run_in; if (etrack->offsets && etrack->offsets->len) { for (i = etrack->offsets->len - 1; i >= 0; i--) { GstMXFDemuxIndex *idx = &g_array_index (etrack->offsets, GstMXFDemuxIndex, i); if (idx->offset != 0 && i <= *position) { demux->offset = idx->offset + demux->run_in; break; } } } gst_mxf_demux_set_partition_for_offset (demux, demux->offset); for (i = 0; i < demux->essence_tracks->len; i++) { GstMXFDemuxEssenceTrack *t = &g_array_index (demux->essence_tracks, GstMXFDemuxEssenceTrack, i); t->position = (demux->offset == demux->run_in) ? 0 : -1; } /* Else peek at all essence elements and complete our * index until we find the requested element */ while (ret == GST_FLOW_OK) { GstBuffer *buffer = NULL; MXFUL key; guint read = 0; ret = gst_mxf_demux_pull_klv_packet (demux, demux->offset, &key, &buffer, &read); if (ret == GST_FLOW_EOS) { for (i = 0; i < demux->essence_tracks->len; i++) { GstMXFDemuxEssenceTrack *t = &g_array_index (demux->essence_tracks, GstMXFDemuxEssenceTrack, i); if (t->position > 0) t->duration = t->position; } /* For the searched track this is really our position */ etrack->duration = etrack->position; for (i = 0; i < demux->src->len; i++) { GstMXFDemuxPad *p = g_ptr_array_index (demux->src, i); if (!p->eos && p->current_essence_track_position >= p->current_essence_track->duration) { GstEvent *e; p->eos = TRUE; e = gst_event_new_eos (); gst_event_set_seqnum (e, demux->seqnum); gst_pad_push_event (GST_PAD_CAST (p), e); } } } if (G_UNLIKELY (ret != GST_FLOW_OK) && etrack->position <= *position) { demux->offset = old_offset; demux->current_partition = old_partition; break; } else if (G_UNLIKELY (ret == GST_FLOW_OK)) { ret = gst_mxf_demux_handle_klv_packet (demux, &key, buffer, TRUE); gst_buffer_unref (buffer); } /* If we found the position read it from the index again */ if (((ret == GST_FLOW_OK && etrack->position == *position + 2) || (ret == GST_FLOW_EOS && etrack->position == *position + 1)) && etrack->offsets && etrack->offsets->len > *position && g_array_index (etrack->offsets, GstMXFDemuxIndex, *position).offset != 0) { GST_DEBUG_OBJECT (demux, "Found at offset %" G_GUINT64_FORMAT, demux->offset); demux->offset = old_offset; demux->current_partition = old_partition; goto from_index; } demux->offset += read; } demux->offset = old_offset; demux->current_partition = old_partition; GST_DEBUG_OBJECT (demux, "Not found in this file"); } return -1; } static GstFlowReturn gst_mxf_demux_pull_and_handle_klv_packet (GstMXFDemux * demux) { GstBuffer *buffer = NULL; MXFUL key; GstFlowReturn ret = GST_FLOW_OK; guint read = 0; if (demux->src->len > 0) { if (!gst_mxf_demux_get_earliest_pad (demux)) { ret = GST_FLOW_EOS; GST_DEBUG_OBJECT (demux, "All tracks are EOS"); goto beach; } } ret = gst_mxf_demux_pull_klv_packet (demux, demux->offset, &key, &buffer, &read); if (ret == GST_FLOW_EOS && demux->src->len > 0) { guint i; GstMXFDemuxPad *p = NULL; for (i = 0; i < demux->essence_tracks->len; i++) { GstMXFDemuxEssenceTrack *t = &g_array_index (demux->essence_tracks, GstMXFDemuxEssenceTrack, i); if (t->position > 0) t->duration = t->position; } for (i = 0; i < demux->src->len; i++) { GstMXFDemuxPad *p = g_ptr_array_index (demux->src, i); if (!p->eos && p->current_essence_track_position >= p->current_essence_track->duration) { GstEvent *e; p->eos = TRUE; e = gst_event_new_eos (); gst_event_set_seqnum (e, demux->seqnum); gst_pad_push_event (GST_PAD_CAST (p), e); } } while ((p = gst_mxf_demux_get_earliest_pad (demux))) { guint64 offset; gint64 position; position = p->current_essence_track_position; offset = gst_mxf_demux_find_essence_element (demux, p->current_essence_track, &position, FALSE); if (offset == -1) { GstEvent *e; GST_ERROR_OBJECT (demux, "Failed to find offset for essence track"); p->eos = TRUE; e = gst_event_new_eos (); gst_event_set_seqnum (e, demux->seqnum); gst_pad_push_event (GST_PAD_CAST (p), e); continue; } demux->offset = offset + demux->run_in; gst_mxf_demux_set_partition_for_offset (demux, demux->offset); p->current_essence_track->position = position; ret = GST_FLOW_OK; goto beach; } } if (G_UNLIKELY (ret != GST_FLOW_OK)) goto beach; ret = gst_mxf_demux_handle_klv_packet (demux, &key, buffer, FALSE); demux->offset += read; if (ret == GST_FLOW_OK && demux->src->len > 0 && demux->essence_tracks->len > 0) { GstMXFDemuxPad *earliest = NULL; /* We allow time drifts of at most 500ms */ while ((earliest = gst_mxf_demux_get_earliest_pad (demux)) && demux->segment.position - earliest->position > demux->max_drift) { guint64 offset; gint64 position; GST_WARNING_OBJECT (demux, "Found synchronization issue -- trying to solve"); position = earliest->current_essence_track_position; /* FIXME: This can probably be improved by using the * offset of position-1 if it's in the same partition * or the start of the position otherwise. * This way we won't skip elements from the same essence * container as etrack->position */ offset = gst_mxf_demux_find_essence_element (demux, earliest->current_essence_track, &position, FALSE); if (offset == -1) { GstEvent *e; GST_WARNING_OBJECT (demux, "Failed to find offset for late essence track"); earliest->eos = TRUE; e = gst_event_new_eos (); gst_event_set_seqnum (e, demux->seqnum); gst_pad_push_event (GST_PAD_CAST (earliest), e); continue; } demux->offset = offset + demux->run_in; gst_mxf_demux_set_partition_for_offset (demux, demux->offset); earliest->current_essence_track->position = position; break; } } beach: if (buffer) gst_buffer_unref (buffer); return ret; } static void gst_mxf_demux_loop (GstPad * pad) { GstMXFDemux *demux = NULL; GstFlowReturn ret = GST_FLOW_OK; GstMapInfo map; gboolean res; demux = GST_MXF_DEMUX (gst_pad_get_parent (pad)); if (demux->run_in == -1) { /* Skip run-in, which is at most 64K and is finished * by a header partition pack */ while (demux->offset < 64 * 1024) { GstBuffer *buffer = NULL; if ((ret = gst_mxf_demux_pull_range (demux, demux->offset, 16, &buffer)) != GST_FLOW_OK) break; gst_buffer_map (buffer, &map, GST_MAP_READ); res = mxf_is_header_partition_pack ((const MXFUL *) map.data); gst_buffer_unmap (buffer, &map); if (res) { GST_DEBUG_OBJECT (demux, "Found header partition pack at offset %" G_GUINT64_FORMAT, demux->offset); demux->run_in = demux->offset; gst_buffer_unref (buffer); break; } demux->offset++; gst_buffer_unref (buffer); } if (G_UNLIKELY (ret != GST_FLOW_OK)) goto pause; if (G_UNLIKELY (demux->run_in == -1)) { GST_ERROR_OBJECT (demux, "No valid header partition pack found"); ret = GST_FLOW_ERROR; goto pause; } /* First of all pull&parse the random index pack at EOF */ gst_mxf_demux_pull_random_index_pack (demux); } /* Now actually do something */ ret = gst_mxf_demux_pull_and_handle_klv_packet (demux); /* pause if something went wrong */ if (G_UNLIKELY (ret != GST_FLOW_OK)) goto pause; /* check EOS condition */ if ((demux->segment.flags & GST_SEEK_FLAG_SEGMENT) && (demux->segment.stop != -1) && (demux->segment.position >= demux->segment.stop)) { guint i; gboolean eos = TRUE; for (i = 0; i < demux->src->len; i++) { GstMXFDemuxPad *p = g_ptr_array_index (demux->src, i); if (!p->eos && p->position < demux->segment.stop) { eos = FALSE; break; } } if (eos) { ret = GST_FLOW_EOS; goto pause; } } gst_object_unref (demux); return; pause: { const gchar *reason = gst_flow_get_name (ret); GST_LOG_OBJECT (demux, "pausing task, reason %s", reason); gst_pad_pause_task (pad); if (ret == GST_FLOW_EOS) { /* perform EOS logic */ if (demux->segment.flags & GST_SEEK_FLAG_SEGMENT) { gint64 stop; GstMessage *m; GstEvent *e; /* for segment playback we need to post when (in stream time) * we stopped, this is either stop (when set) or the duration. */ if ((stop = demux->segment.stop) == -1) stop = demux->segment.duration; GST_LOG_OBJECT (demux, "Sending segment done, at end of segment"); m = gst_message_new_segment_done (GST_OBJECT_CAST (demux), GST_FORMAT_TIME, stop); gst_message_set_seqnum (m, demux->seqnum); gst_element_post_message (GST_ELEMENT_CAST (demux), m); e = gst_event_new_segment_done (GST_FORMAT_TIME, stop); gst_event_set_seqnum (e, demux->seqnum); gst_mxf_demux_push_src_event (demux, e); } else { GstEvent *e; /* normal playback, send EOS to all linked pads */ GST_LOG_OBJECT (demux, "Sending EOS, at end of stream"); e = gst_event_new_eos (); gst_event_set_seqnum (e, demux->seqnum); if (!gst_mxf_demux_push_src_event (demux, e)) { GST_WARNING_OBJECT (demux, "failed pushing EOS on streams"); } } } else if (ret == GST_FLOW_NOT_LINKED || ret < GST_FLOW_EOS) { GstEvent *e; GST_ELEMENT_ERROR (demux, STREAM, FAILED, ("Internal data stream error."), ("stream stopped, reason %s", reason)); e = gst_event_new_eos (); gst_event_set_seqnum (e, demux->seqnum); gst_mxf_demux_push_src_event (demux, e); } gst_object_unref (demux); return; } } static GstFlowReturn gst_mxf_demux_chain (GstPad * pad, GstObject * parent, GstBuffer * inbuf) { GstFlowReturn ret = GST_FLOW_OK; GstMXFDemux *demux = NULL; MXFUL key; const guint8 *data = NULL; guint64 length = 0; guint64 offset = 0; GstBuffer *buffer = NULL; gboolean res; #ifndef GST_DISABLE_GST_DEBUG gchar str[48]; #endif demux = GST_MXF_DEMUX (parent); GST_LOG_OBJECT (demux, "received buffer of %" G_GSIZE_FORMAT " bytes at offset %" G_GUINT64_FORMAT, gst_buffer_get_size (inbuf), GST_BUFFER_OFFSET (inbuf)); if (demux->src->len > 0) { if (!gst_mxf_demux_get_earliest_pad (demux)) { ret = GST_FLOW_EOS; GST_DEBUG_OBJECT (demux, "All tracks are EOS"); return ret; } } if (G_UNLIKELY (GST_BUFFER_OFFSET (inbuf) == 0)) { GST_DEBUG_OBJECT (demux, "beginning of file, expect header"); demux->run_in = -1; demux->offset = 0; } if (G_UNLIKELY (demux->offset == 0 && GST_BUFFER_OFFSET (inbuf) != 0)) { GST_DEBUG_OBJECT (demux, "offset was zero, synchronizing with buffer's"); if (GST_BUFFER_OFFSET_IS_VALID (inbuf)) demux->offset = GST_BUFFER_OFFSET (inbuf); gst_mxf_demux_set_partition_for_offset (demux, demux->offset); } else if (demux->current_partition == NULL) { gst_mxf_demux_set_partition_for_offset (demux, demux->offset); } gst_adapter_push (demux->adapter, inbuf); inbuf = NULL; while (ret == GST_FLOW_OK) { if (G_UNLIKELY (demux->flushing)) { GST_DEBUG_OBJECT (demux, "we are now flushing, exiting parser loop"); ret = GST_FLOW_FLUSHING; break; } if (gst_adapter_available (demux->adapter) < 16) break; if (demux->run_in == -1) { /* Skip run-in, which is at most 64K and is finished * by a header partition pack */ while (demux->offset < 64 * 1024 && gst_adapter_available (demux->adapter) >= 16) { data = gst_adapter_map (demux->adapter, 16); res = mxf_is_header_partition_pack ((const MXFUL *) data); gst_adapter_unmap (demux->adapter); if (res) { GST_DEBUG_OBJECT (demux, "Found header partition pack at offset %" G_GUINT64_FORMAT, demux->offset); demux->run_in = demux->offset; break; } gst_adapter_flush (demux->adapter, 1); demux->offset++; } } else if (demux->offset < demux->run_in) { guint64 flush = MIN (gst_adapter_available (demux->adapter), demux->run_in - demux->offset); gst_adapter_flush (demux->adapter, flush); demux->offset += flush; continue; } if (G_UNLIKELY (ret != GST_FLOW_OK)) break; /* Need more data */ if (demux->run_in == -1 && demux->offset < 64 * 1024) break; if (G_UNLIKELY (demux->run_in == -1)) { GST_ERROR_OBJECT (demux, "No valid header partition pack found"); ret = GST_FLOW_ERROR; break; } if (gst_adapter_available (demux->adapter) < 17) break; /* Now actually do something */ memset (&key, 0, sizeof (MXFUL)); /* Pull 16 byte key and first byte of BER encoded length */ data = gst_adapter_map (demux->adapter, 17); memcpy (&key, data, 16); GST_DEBUG_OBJECT (demux, "Got KLV packet with key %s", mxf_ul_to_string (&key, str)); /* Decode BER encoded packet length */ if ((data[16] & 0x80) == 0) { length = data[16]; offset = 17; } else { guint slen = data[16] & 0x7f; offset = 16 + 1 + slen; gst_adapter_unmap (demux->adapter); /* Must be at most 8 according to SMPTE-379M 5.3.4 and * GStreamer buffers can only have a 4 bytes length */ if (slen > 8) { GST_ERROR_OBJECT (demux, "Invalid KLV packet length: %u", slen); ret = GST_FLOW_ERROR; break; } if (gst_adapter_available (demux->adapter) < 17 + slen) break; data = gst_adapter_map (demux->adapter, 17 + slen); data += 17; length = 0; while (slen) { length = (length << 8) | *data; data++; slen--; } } gst_adapter_unmap (demux->adapter); /* GStreamer's buffer sizes are stored in a guint so we * limit ourself to G_MAXUINT large buffers */ if (length > G_MAXUINT) { GST_ERROR_OBJECT (demux, "Unsupported KLV packet length: %" G_GUINT64_FORMAT, length); ret = GST_FLOW_ERROR; break; } GST_DEBUG_OBJECT (demux, "KLV packet with key %s has length " "%" G_GUINT64_FORMAT, mxf_ul_to_string (&key, str), length); if (gst_adapter_available (demux->adapter) < offset + length) break; gst_adapter_flush (demux->adapter, offset); if (length > 0) { buffer = gst_adapter_take_buffer (demux->adapter, length); ret = gst_mxf_demux_handle_klv_packet (demux, &key, buffer, FALSE); gst_buffer_unref (buffer); } demux->offset += offset + length; } return ret; } static void gst_mxf_demux_pad_set_position (GstMXFDemux * demux, GstMXFDemuxPad * p, GstClockTime start) { guint i; GstClockTime sum = 0; MXFMetadataSourceClip *clip = NULL; if (!p->current_component) { p->current_essence_track_position = gst_util_uint64_scale (start, p->material_track->edit_rate.n, p->material_track->edit_rate.d * GST_SECOND); if (p->current_essence_track_position >= p->current_essence_track->duration && p->current_essence_track->duration > 0) { p->current_essence_track_position = p->current_essence_track->duration; p->position = gst_util_uint64_scale (p->current_essence_track->duration, p->material_track->edit_rate.d * GST_SECOND, p->material_track->edit_rate.n); } else { p->position = start; } p->position_accumulated_error = 0.0; return; } for (i = 0; i < p->material_track->parent.sequence->n_structural_components; i++) { clip = MXF_METADATA_SOURCE_CLIP (p->material_track->parent.sequence-> structural_components[i]); if (clip->parent.duration <= 0) break; sum += gst_util_uint64_scale (clip->parent.duration, p->material_track->edit_rate.d * GST_SECOND, p->material_track->edit_rate.n); if (sum > start) break; } if (i == p->material_track->parent.sequence->n_structural_components) { p->position = sum; p->position_accumulated_error = 0.0; gst_mxf_demux_pad_set_component (demux, p, i); return; } if (clip->parent.duration > 0) sum -= gst_util_uint64_scale (clip->parent.duration, p->material_track->edit_rate.d * GST_SECOND, p->material_track->edit_rate.n); start -= sum; gst_mxf_demux_pad_set_component (demux, p, i); { gint64 essence_offset = gst_util_uint64_scale (start, p->current_essence_track->source_track->edit_rate.n, p->current_essence_track->source_track->edit_rate.d * GST_SECOND); p->current_essence_track_position += essence_offset; p->position = sum + gst_util_uint64_scale (essence_offset, GST_SECOND * p->material_track->edit_rate.d, p->material_track->edit_rate.n); p->position_accumulated_error = 0.0; } if (p->current_essence_track_position >= p->current_essence_track->duration && p->current_essence_track->duration > 0) { p->current_essence_track_position = p->current_essence_track->duration; p->position = sum + gst_util_uint64_scale (p->current_component->parent.duration, p->material_track->edit_rate.d * GST_SECOND, p->material_track->edit_rate.n); } } static gboolean gst_mxf_demux_seek_push (GstMXFDemux * demux, GstEvent * event) { GstFormat format; GstSeekFlags flags; GstSeekType start_type, stop_type; gint64 start, stop; gdouble rate; gboolean update, flush, keyframe; GstSegment seeksegment; guint i; guint32 seqnum; gst_event_parse_seek (event, &rate, &format, &flags, &start_type, &start, &stop_type, &stop); seqnum = gst_event_get_seqnum (event); if (rate <= 0.0) goto wrong_rate; if (format != GST_FORMAT_TIME) goto wrong_format; flush = ! !(flags & GST_SEEK_FLAG_FLUSH); keyframe = ! !(flags & GST_SEEK_FLAG_KEY_UNIT); /* Work on a copy until we are sure the seek succeeded. */ memcpy (&seeksegment, &demux->segment, sizeof (GstSegment)); GST_DEBUG_OBJECT (demux, "segment before configure %" GST_SEGMENT_FORMAT, &demux->segment); /* Apply the seek to our segment */ gst_segment_do_seek (&seeksegment, rate, format, flags, start_type, start, stop_type, stop, &update); GST_DEBUG_OBJECT (demux, "segment configured %" GST_SEGMENT_FORMAT, &seeksegment); if (flush || seeksegment.position != demux->segment.position) { gboolean ret; guint64 new_offset = -1; GstEvent *e; if (!demux->metadata_resolved || demux->update_metadata) { if (gst_mxf_demux_resolve_references (demux) != GST_FLOW_OK || gst_mxf_demux_update_tracks (demux) != GST_FLOW_OK) { goto unresolved_metadata; } } /* Do the actual seeking */ for (i = 0; i < demux->src->len; i++) { GstMXFDemuxPad *p = g_ptr_array_index (demux->src, i); gint64 position; guint64 off; /* Reset EOS flag on all pads */ p->eos = FALSE; p->last_flow = GST_FLOW_OK; gst_mxf_demux_pad_set_position (demux, p, start); position = p->current_essence_track_position; off = gst_mxf_demux_find_essence_element (demux, p->current_essence_track, &position, keyframe); new_offset = MIN (off, new_offset); p->discont = TRUE; } if (new_offset == -1) goto no_new_offset; new_offset += demux->run_in; GST_DEBUG_OBJECT (demux, "generating an upstream seek at position %" G_GUINT64_FORMAT, new_offset); e = gst_event_new_seek (seeksegment.rate, GST_FORMAT_BYTES, seeksegment.flags | GST_SEEK_FLAG_ACCURATE, GST_SEEK_TYPE_SET, new_offset, GST_SEEK_TYPE_NONE, 0); gst_event_set_seqnum (e, seqnum); ret = gst_pad_push_event (demux->sinkpad, e); if (G_UNLIKELY (!ret)) { goto seek_failed; } } /* Tell all the stream a new segment is needed */ for (i = 0; i < demux->src->len; i++) { GstMXFDemuxPad *p = g_ptr_array_index (demux->src, i); p->need_segment = TRUE; } for (i = 0; i < demux->essence_tracks->len; i++) { GstMXFDemuxEssenceTrack *t = &g_array_index (demux->essence_tracks, GstMXFDemuxEssenceTrack, i); t->position = -1; } /* Ok seek succeeded, take the newly configured segment */ memcpy (&demux->segment, &seeksegment, sizeof (GstSegment)); return TRUE; /* ERRORS */ wrong_format: { GST_WARNING_OBJECT (demux, "seeking only supported in TIME format"); return gst_pad_push_event (demux->sinkpad, gst_event_ref (event)); } wrong_rate: { GST_WARNING_OBJECT (demux, "only rates > 0.0 are allowed"); return FALSE; } unresolved_metadata: { GST_WARNING_OBJECT (demux, "metadata can't be resolved"); return gst_pad_push_event (demux->sinkpad, gst_event_ref (event)); } seek_failed: { GST_WARNING_OBJECT (demux, "upstream seek failed"); return gst_pad_push_event (demux->sinkpad, gst_event_ref (event)); } no_new_offset: { GST_WARNING_OBJECT (demux, "can't find new offset"); return gst_pad_push_event (demux->sinkpad, gst_event_ref (event)); } } static gboolean gst_mxf_demux_seek_pull (GstMXFDemux * demux, GstEvent * event) { GstClockTime keyunit_ts; GstFormat format; GstSeekFlags flags; GstSeekType start_type, stop_type; gint64 start, stop; gdouble rate; gboolean update, flush, keyframe; GstSegment seeksegment; guint i; gboolean ret = TRUE; guint32 seqnum; gst_event_parse_seek (event, &rate, &format, &flags, &start_type, &start, &stop_type, &stop); seqnum = gst_event_get_seqnum (event); if (format != GST_FORMAT_TIME) goto wrong_format; if (rate <= 0.0) goto wrong_rate; flush = ! !(flags & GST_SEEK_FLAG_FLUSH); keyframe = ! !(flags & GST_SEEK_FLAG_KEY_UNIT); keyunit_ts = start; if (flush) { GstEvent *e; /* Flush start up and downstream to make sure data flow and loops are idle */ e = gst_event_new_flush_start (); gst_event_set_seqnum (e, seqnum); gst_mxf_demux_push_src_event (demux, gst_event_ref (e)); gst_pad_push_event (demux->sinkpad, e); } else { /* Pause the pulling task */ gst_pad_pause_task (demux->sinkpad); } /* Take the stream lock */ GST_PAD_STREAM_LOCK (demux->sinkpad); if (flush) { GstEvent *e; /* Stop flushing upstream we need to pull */ e = gst_event_new_flush_stop (TRUE); gst_event_set_seqnum (e, seqnum); gst_pad_push_event (demux->sinkpad, e); } /* Work on a copy until we are sure the seek succeeded. */ memcpy (&seeksegment, &demux->segment, sizeof (GstSegment)); GST_DEBUG_OBJECT (demux, "segment before configure %" GST_SEGMENT_FORMAT, &demux->segment); /* Apply the seek to our segment */ gst_segment_do_seek (&seeksegment, rate, format, flags, start_type, start, stop_type, stop, &update); GST_DEBUG_OBJECT (demux, "segment configured %" GST_SEGMENT_FORMAT, &seeksegment); if (flush || seeksegment.position != demux->segment.position) { guint64 new_offset = -1; if (!demux->metadata_resolved || demux->update_metadata) { if (gst_mxf_demux_resolve_references (demux) != GST_FLOW_OK || gst_mxf_demux_update_tracks (demux) != GST_FLOW_OK) { goto unresolved_metadata; } } /* Do the actual seeking */ for (i = 0; i < demux->src->len; i++) { MXFMetadataTrackType track_type = MXF_METADATA_TRACK_UNKNOWN; GstMXFDemuxPad *p = g_ptr_array_index (demux->src, i); gint64 position; guint64 off; if (p->material_track != NULL) track_type = p->material_track->parent.type; /* Reset EOS flag on all pads */ p->eos = FALSE; p->last_flow = GST_FLOW_OK; gst_mxf_demux_pad_set_position (demux, p, start); /* we always want to send data starting with a key unit */ position = p->current_essence_track_position; off = gst_mxf_demux_find_essence_element (demux, p->current_essence_track, &position, TRUE); if (off == -1) { GST_DEBUG_OBJECT (demux, "Unable to find offset for pad %s", GST_PAD_NAME (p)); p->current_essence_track_position = p->current_essence_track->duration; } else { new_offset = MIN (off, new_offset); if (position != p->current_essence_track_position) { p->position -= gst_util_uint64_scale (p->current_essence_track_position - position, GST_SECOND * p->current_essence_track->source_track->edit_rate.d, p->current_essence_track->source_track->edit_rate.n); } p->current_essence_track_position = position; /* FIXME: what about DV + MPEG-TS container essence tracks? */ if (track_type == MXF_METADATA_TRACK_PICTURE_ESSENCE) { keyunit_ts = MIN (p->position, keyunit_ts); } } p->discont = TRUE; } if (new_offset == -1) { GST_WARNING_OBJECT (demux, "No new offset found"); ret = FALSE; } else { demux->offset = new_offset + demux->run_in; } gst_mxf_demux_set_partition_for_offset (demux, demux->offset); } if (G_UNLIKELY (demux->close_seg_event)) { gst_event_unref (demux->close_seg_event); demux->close_seg_event = NULL; } if (flush) { GstEvent *e; /* Stop flushing, the sinks are at time 0 now */ e = gst_event_new_flush_stop (TRUE); gst_event_set_seqnum (e, seqnum); gst_mxf_demux_push_src_event (demux, e); } else { GST_DEBUG_OBJECT (demux, "closing running segment %" GST_SEGMENT_FORMAT, &demux->segment); /* Close the current segment for a linear playback */ demux->close_seg_event = gst_event_new_segment (&demux->segment); gst_event_set_seqnum (demux->close_seg_event, demux->seqnum); } if (keyframe && keyunit_ts != start) { GST_INFO_OBJECT (demux, "key unit seek, adjusting segment start to " "%" GST_TIME_FORMAT, GST_TIME_ARGS (keyunit_ts)); gst_segment_do_seek (&seeksegment, rate, format, flags, start_type, keyunit_ts, stop_type, stop, &update); } /* Ok seek succeeded, take the newly configured segment */ memcpy (&demux->segment, &seeksegment, sizeof (GstSegment)); /* Notify about the start of a new segment */ if (demux->segment.flags & GST_SEEK_FLAG_SEGMENT) { GstMessage *m; m = gst_message_new_segment_start (GST_OBJECT (demux), demux->segment.format, demux->segment.position); gst_message_set_seqnum (m, seqnum); gst_element_post_message (GST_ELEMENT (demux), m); } /* Tell all the stream a new segment is needed */ for (i = 0; i < demux->src->len; i++) { GstMXFDemuxPad *p = g_ptr_array_index (demux->src, i); p->need_segment = TRUE; } for (i = 0; i < demux->essence_tracks->len; i++) { GstMXFDemuxEssenceTrack *t = &g_array_index (demux->essence_tracks, GstMXFDemuxEssenceTrack, i); t->position = -1; } demux->seqnum = seqnum; gst_pad_start_task (demux->sinkpad, (GstTaskFunction) gst_mxf_demux_loop, demux->sinkpad, NULL); GST_PAD_STREAM_UNLOCK (demux->sinkpad); return ret; /* ERRORS */ wrong_format: { GST_WARNING_OBJECT (demux, "seeking only supported in TIME format"); return FALSE; } wrong_rate: { GST_WARNING_OBJECT (demux, "only rates > 0.0 are allowed"); return FALSE; } unresolved_metadata: { gst_pad_start_task (demux->sinkpad, (GstTaskFunction) gst_mxf_demux_loop, demux->sinkpad, NULL); GST_PAD_STREAM_UNLOCK (demux->sinkpad); GST_WARNING_OBJECT (demux, "metadata can't be resolved"); return FALSE; } } static gboolean gst_mxf_demux_src_event (GstPad * pad, GstObject * parent, GstEvent * event) { GstMXFDemux *demux = GST_MXF_DEMUX (parent); gboolean ret; GST_DEBUG_OBJECT (pad, "handling event %s", GST_EVENT_TYPE_NAME (event)); switch (GST_EVENT_TYPE (event)) { case GST_EVENT_SEEK: if (demux->random_access) ret = gst_mxf_demux_seek_pull (demux, event); else ret = gst_mxf_demux_seek_push (demux, event); gst_event_unref (event); break; default: ret = gst_pad_push_event (demux->sinkpad, event); break; } return ret; } static gboolean gst_mxf_demux_src_query (GstPad * pad, GstObject * parent, GstQuery * query) { GstMXFDemux *demux = GST_MXF_DEMUX (parent); gboolean ret = FALSE; GstMXFDemuxPad *mxfpad = GST_MXF_DEMUX_PAD (pad); GST_DEBUG_OBJECT (pad, "handling query %s", gst_query_type_get_name (GST_QUERY_TYPE (query))); switch (GST_QUERY_TYPE (query)) { case GST_QUERY_POSITION: { GstFormat format; gint64 pos; gst_query_parse_position (query, &format, NULL); if (format != GST_FORMAT_TIME && format != GST_FORMAT_DEFAULT) goto error; pos = mxfpad->position; g_rw_lock_reader_lock (&demux->metadata_lock); if (format == GST_FORMAT_DEFAULT && pos != GST_CLOCK_TIME_NONE) { if (!mxfpad->material_track || mxfpad->material_track->edit_rate.n == 0 || mxfpad->material_track->edit_rate.d == 0) { g_rw_lock_reader_unlock (&demux->metadata_lock); goto error; } pos = gst_util_uint64_scale (pos, mxfpad->material_track->edit_rate.n, mxfpad->material_track->edit_rate.d * GST_SECOND); } g_rw_lock_reader_unlock (&demux->metadata_lock); GST_DEBUG_OBJECT (pad, "Returning position %" G_GINT64_FORMAT " in format %s", pos, gst_format_get_name (format)); gst_query_set_position (query, format, pos); ret = TRUE; break; } case GST_QUERY_DURATION:{ gint64 duration; GstFormat format; gst_query_parse_duration (query, &format, NULL); if (format != GST_FORMAT_TIME && format != GST_FORMAT_DEFAULT) goto error; g_rw_lock_reader_lock (&demux->metadata_lock); if (!mxfpad->material_track || !mxfpad->material_track->parent.sequence) { g_rw_lock_reader_unlock (&demux->metadata_lock); goto error; } duration = mxfpad->material_track->parent.sequence->duration; if (duration <= -1) duration = -1; if (duration != -1 && format == GST_FORMAT_TIME) { if (mxfpad->material_track->edit_rate.n == 0 || mxfpad->material_track->edit_rate.d == 0) { g_rw_lock_reader_unlock (&demux->metadata_lock); goto error; } duration = gst_util_uint64_scale (duration, GST_SECOND * mxfpad->material_track->edit_rate.d, mxfpad->material_track->edit_rate.n); } g_rw_lock_reader_unlock (&demux->metadata_lock); GST_DEBUG_OBJECT (pad, "Returning duration %" G_GINT64_FORMAT " in format %s", duration, gst_format_get_name (format)); gst_query_set_duration (query, format, duration); ret = TRUE; break; } case GST_QUERY_SEEKING:{ GstFormat fmt; ret = TRUE; gst_query_parse_seeking (query, &fmt, NULL, NULL, NULL); if (fmt != GST_FORMAT_TIME) { gst_query_set_seeking (query, fmt, FALSE, -1, -1); goto done; } if (demux->random_access) { gst_query_set_seeking (query, GST_FORMAT_TIME, TRUE, 0, -1); } else { GstQuery *peerquery = gst_query_new_seeking (GST_FORMAT_BYTES); gboolean seekable; seekable = gst_pad_peer_query (demux->sinkpad, peerquery); if (seekable) gst_query_parse_seeking (peerquery, NULL, &seekable, NULL, NULL); if (seekable) gst_query_set_seeking (query, GST_FORMAT_TIME, TRUE, 0, -1); else gst_query_set_seeking (query, GST_FORMAT_TIME, FALSE, -1, -1); } break; } case GST_QUERY_SEGMENT:{ GstFormat format; gint64 start, stop; format = demux->segment.format; start = gst_segment_to_stream_time (&demux->segment, format, demux->segment.start); if ((stop = demux->segment.stop) == -1) stop = demux->segment.duration; else stop = gst_segment_to_stream_time (&demux->segment, format, stop); gst_query_set_segment (query, demux->segment.rate, format, start, stop); ret = TRUE; break; } default: ret = gst_pad_query_default (pad, parent, query); break; } done: return ret; /* ERRORS */ error: { GST_DEBUG_OBJECT (pad, "query failed"); goto done; } } static gboolean gst_mxf_demux_sink_activate (GstPad * sinkpad, GstObject * parent) { GstQuery *query; GstPadMode mode = GST_PAD_MODE_PUSH; query = gst_query_new_scheduling (); if (gst_pad_peer_query (sinkpad, query)) { if (gst_query_has_scheduling_mode_with_flags (query, GST_PAD_MODE_PULL, GST_SCHEDULING_FLAG_SEEKABLE)) { GstSchedulingFlags flags; gst_query_parse_scheduling (query, &flags, NULL, NULL, NULL); if (!(flags & GST_SCHEDULING_FLAG_SEQUENTIAL)) mode = GST_PAD_MODE_PULL; } } gst_query_unref (query); return gst_pad_activate_mode (sinkpad, mode, TRUE); } static gboolean gst_mxf_demux_sink_activate_mode (GstPad * sinkpad, GstObject * parent, GstPadMode mode, gboolean active) { GstMXFDemux *demux; demux = GST_MXF_DEMUX (parent); if (mode == GST_PAD_MODE_PUSH) { demux->random_access = FALSE; } else { if (active) { demux->random_access = TRUE; return gst_pad_start_task (sinkpad, (GstTaskFunction) gst_mxf_demux_loop, sinkpad, NULL); } else { demux->random_access = FALSE; return gst_pad_stop_task (sinkpad); } } return TRUE; } static gboolean gst_mxf_demux_sink_event (GstPad * pad, GstObject * parent, GstEvent * event) { GstMXFDemux *demux; gboolean ret = FALSE; demux = GST_MXF_DEMUX (parent); GST_DEBUG_OBJECT (pad, "handling event %s", GST_EVENT_TYPE_NAME (event)); switch (GST_EVENT_TYPE (event)) { case GST_EVENT_FLUSH_START: demux->flushing = TRUE; ret = gst_pad_event_default (pad, parent, event); break; case GST_EVENT_FLUSH_STOP: GST_DEBUG_OBJECT (demux, "flushing queued data in the MXF demuxer"); gst_adapter_clear (demux->adapter); demux->flushing = FALSE; demux->offset = 0; ret = gst_pad_event_default (pad, parent, event); break; case GST_EVENT_EOS:{ GstMXFDemuxPad *p = NULL; guint i; for (i = 0; i < demux->essence_tracks->len; i++) { GstMXFDemuxEssenceTrack *t = &g_array_index (demux->essence_tracks, GstMXFDemuxEssenceTrack, i); if (t->position > 0) t->duration = t->position; } for (i = 0; i < demux->src->len; i++) { GstMXFDemuxPad *p = g_ptr_array_index (demux->src, i); if (!p->eos && p->current_essence_track_position >= p->current_essence_track->duration) { p->eos = TRUE; gst_pad_push_event (GST_PAD_CAST (p), gst_event_new_eos ()); } } while ((p = gst_mxf_demux_get_earliest_pad (demux))) { guint64 offset; gint64 position; position = p->current_essence_track_position; offset = gst_mxf_demux_find_essence_element (demux, p->current_essence_track, &position, FALSE); if (offset == -1) { GST_ERROR_OBJECT (demux, "Failed to find offset for essence track"); p->eos = TRUE; gst_pad_push_event (GST_PAD_CAST (p), gst_event_new_eos ()); continue; } if (gst_pad_push_event (demux->sinkpad, gst_event_new_seek (demux->segment.rate, GST_FORMAT_BYTES, demux->segment.flags | GST_SEEK_FLAG_ACCURATE, GST_SEEK_TYPE_SET, offset + demux->run_in, GST_SEEK_TYPE_NONE, 0))) { for (i = 0; i < demux->essence_tracks->len; i++) { GstMXFDemuxEssenceTrack *etrack = &g_array_index (demux->essence_tracks, GstMXFDemuxEssenceTrack, i); etrack->position = -1; } ret = TRUE; goto out; } else { GST_WARNING_OBJECT (demux, "Seek to remaining part of the file failed"); } } /* and one more time for good measure apparently? */ gst_pad_event_default (pad, parent, event); ret = (demux->src->len > 0); break; } case GST_EVENT_SEGMENT:{ guint i; for (i = 0; i < demux->essence_tracks->len; i++) { GstMXFDemuxEssenceTrack *t = &g_array_index (demux->essence_tracks, GstMXFDemuxEssenceTrack, i); t->position = -1; } demux->current_partition = NULL; demux->seqnum = gst_event_get_seqnum (event); gst_event_unref (event); ret = TRUE; break; } default: ret = gst_pad_event_default (pad, parent, event); break; } out: return ret; } static gboolean gst_mxf_demux_query (GstElement * element, GstQuery * query) { GstMXFDemux *demux = GST_MXF_DEMUX (element); gboolean ret = FALSE; GST_DEBUG_OBJECT (demux, "handling query %s", gst_query_type_get_name (GST_QUERY_TYPE (query))); switch (GST_QUERY_TYPE (query)) { case GST_QUERY_POSITION: { GstFormat format; gint64 pos; gst_query_parse_position (query, &format, NULL); if (format != GST_FORMAT_TIME) goto error; pos = demux->segment.position; GST_DEBUG_OBJECT (demux, "Returning position %" G_GINT64_FORMAT " in format %s", pos, gst_format_get_name (format)); gst_query_set_position (query, format, pos); ret = TRUE; break; } case GST_QUERY_DURATION:{ gint64 duration = -1; GstFormat format; guint i; gst_query_parse_duration (query, &format, NULL); if (format != GST_FORMAT_TIME) goto error; if (demux->src->len == 0) goto done; g_rw_lock_reader_lock (&demux->metadata_lock); for (i = 0; i < demux->src->len; i++) { GstMXFDemuxPad *pad = g_ptr_array_index (demux->src, i); gint64 pdur = -1; if (!pad->material_track || !pad->material_track->parent.sequence) continue; pdur = pad->material_track->parent.sequence->duration; if (pad->material_track->edit_rate.n == 0 || pad->material_track->edit_rate.d == 0 || pdur <= -1) continue; pdur = gst_util_uint64_scale (pdur, GST_SECOND * pad->material_track->edit_rate.d, pad->material_track->edit_rate.n); duration = MAX (duration, pdur); } g_rw_lock_reader_unlock (&demux->metadata_lock); if (duration == -1) { GST_DEBUG_OBJECT (demux, "No duration known (yet)"); goto done; } GST_DEBUG_OBJECT (demux, "Returning duration %" G_GINT64_FORMAT " in format %s", duration, gst_format_get_name (format)); gst_query_set_duration (query, format, duration); ret = TRUE; break; } case GST_QUERY_SEEKING:{ GstFormat fmt; ret = TRUE; gst_query_parse_seeking (query, &fmt, NULL, NULL, NULL); if (fmt != GST_FORMAT_TIME) { gst_query_set_seeking (query, fmt, FALSE, -1, -1); goto done; } if (demux->random_access) { gst_query_set_seeking (query, GST_FORMAT_TIME, TRUE, 0, -1); } else { GstQuery *peerquery = gst_query_new_seeking (GST_FORMAT_BYTES); gboolean seekable; seekable = gst_pad_peer_query (demux->sinkpad, peerquery); if (seekable) gst_query_parse_seeking (peerquery, NULL, &seekable, NULL, NULL); if (seekable) gst_query_set_seeking (query, GST_FORMAT_TIME, TRUE, 0, -1); else gst_query_set_seeking (query, GST_FORMAT_TIME, FALSE, -1, -1); } break; } case GST_QUERY_SEGMENT:{ GstFormat format; gint64 start, stop; format = demux->segment.format; start = gst_segment_to_stream_time (&demux->segment, format, demux->segment.start); if ((stop = demux->segment.stop) == -1) stop = demux->segment.duration; else stop = gst_segment_to_stream_time (&demux->segment, format, stop); gst_query_set_segment (query, demux->segment.rate, format, start, stop); ret = TRUE; break; } default: /* else forward upstream */ ret = gst_pad_peer_query (demux->sinkpad, query); break; } done: return ret; /* ERRORS */ error: { GST_DEBUG_OBJECT (demux, "query failed"); goto done; } } static GstStateChangeReturn gst_mxf_demux_change_state (GstElement * element, GstStateChange transition) { GstMXFDemux *demux = GST_MXF_DEMUX (element); GstStateChangeReturn ret; switch (transition) { case GST_STATE_CHANGE_READY_TO_PAUSED: demux->seqnum = gst_util_seqnum_next (); break; default: break; } ret = GST_ELEMENT_CLASS (parent_class)->change_state (element, transition); if (ret == GST_STATE_CHANGE_FAILURE) return ret; switch (transition) { case GST_STATE_CHANGE_PAUSED_TO_READY: gst_mxf_demux_reset (demux); break; default: break; } return ret; } static void gst_mxf_demux_set_property (GObject * object, guint prop_id, const GValue * value, GParamSpec * pspec) { GstMXFDemux *demux = GST_MXF_DEMUX (object); switch (prop_id) { case PROP_PACKAGE: g_free (demux->requested_package_string); demux->requested_package_string = g_value_dup_string (value); break; case PROP_MAX_DRIFT: demux->max_drift = g_value_get_uint64 (value); break; default: G_OBJECT_WARN_INVALID_PROPERTY_ID (object, prop_id, pspec); break; } } static void gst_mxf_demux_get_property (GObject * object, guint prop_id, GValue * value, GParamSpec * pspec) { GstMXFDemux *demux = GST_MXF_DEMUX (object); switch (prop_id) { case PROP_PACKAGE: g_value_set_string (value, demux->current_package_string); break; case PROP_MAX_DRIFT: g_value_set_uint64 (value, demux->max_drift); break; case PROP_STRUCTURE:{ GstStructure *s; g_rw_lock_reader_lock (&demux->metadata_lock); if (demux->preface) s = mxf_metadata_base_to_structure (MXF_METADATA_BASE (demux->preface)); else s = NULL; gst_value_set_structure (value, s); if (s) gst_structure_free (s); g_rw_lock_reader_unlock (&demux->metadata_lock); break; } default: G_OBJECT_WARN_INVALID_PROPERTY_ID (object, prop_id, pspec); break; } } static void gst_mxf_demux_finalize (GObject * object) { GstMXFDemux *demux = GST_MXF_DEMUX (object); gst_mxf_demux_reset (demux); if (demux->adapter) { g_object_unref (demux->adapter); demux->adapter = NULL; } if (demux->flowcombiner) { gst_flow_combiner_free (demux->flowcombiner); demux->flowcombiner = NULL; } if (demux->close_seg_event) { gst_event_unref (demux->close_seg_event); demux->close_seg_event = NULL; } g_free (demux->current_package_string); demux->current_package_string = NULL; g_free (demux->requested_package_string); demux->requested_package_string = NULL; g_ptr_array_free (demux->src, TRUE); demux->src = NULL; g_array_free (demux->essence_tracks, TRUE); demux->essence_tracks = NULL; g_hash_table_destroy (demux->metadata); g_rw_lock_clear (&demux->metadata_lock); G_OBJECT_CLASS (parent_class)->finalize (object); } static void gst_mxf_demux_class_init (GstMXFDemuxClass * klass) { GstElementClass *gstelement_class = GST_ELEMENT_CLASS (klass); GObjectClass *gobject_class = G_OBJECT_CLASS (klass); GST_DEBUG_CATEGORY_INIT (mxfdemux_debug, "mxfdemux", 0, "MXF demuxer"); parent_class = g_type_class_peek_parent (klass); gobject_class->finalize = gst_mxf_demux_finalize; gobject_class->set_property = gst_mxf_demux_set_property; gobject_class->get_property = gst_mxf_demux_get_property; g_object_class_install_property (gobject_class, PROP_PACKAGE, g_param_spec_string ("package", "Package", "Material or Source package to use for playback", NULL, G_PARAM_READWRITE | G_PARAM_STATIC_STRINGS)); g_object_class_install_property (gobject_class, PROP_MAX_DRIFT, g_param_spec_uint64 ("max-drift", "Maximum drift", "Maximum number of nanoseconds by which tracks can differ", 100 * GST_MSECOND, G_MAXUINT64, 500 * GST_MSECOND, G_PARAM_READWRITE | G_PARAM_STATIC_STRINGS)); g_object_class_install_property (gobject_class, PROP_STRUCTURE, g_param_spec_boxed ("structure", "Structure", "Structural metadata of the MXF file", GST_TYPE_STRUCTURE, G_PARAM_READABLE | G_PARAM_STATIC_STRINGS)); gstelement_class->change_state = GST_DEBUG_FUNCPTR (gst_mxf_demux_change_state); gstelement_class->query = GST_DEBUG_FUNCPTR (gst_mxf_demux_query); gst_element_class_add_pad_template (gstelement_class, gst_static_pad_template_get (&mxf_sink_template)); gst_element_class_add_pad_template (gstelement_class, gst_static_pad_template_get (&mxf_src_template)); gst_element_class_set_static_metadata (gstelement_class, "MXF Demuxer", "Codec/Demuxer", "Demux MXF files", "Sebastian Dröge "); } static void gst_mxf_demux_init (GstMXFDemux * demux) { demux->sinkpad = gst_pad_new_from_static_template (&mxf_sink_template, "sink"); gst_pad_set_event_function (demux->sinkpad, GST_DEBUG_FUNCPTR (gst_mxf_demux_sink_event)); gst_pad_set_chain_function (demux->sinkpad, GST_DEBUG_FUNCPTR (gst_mxf_demux_chain)); gst_pad_set_activate_function (demux->sinkpad, GST_DEBUG_FUNCPTR (gst_mxf_demux_sink_activate)); gst_pad_set_activatemode_function (demux->sinkpad, GST_DEBUG_FUNCPTR (gst_mxf_demux_sink_activate_mode)); gst_element_add_pad (GST_ELEMENT (demux), demux->sinkpad); demux->max_drift = 500 * GST_MSECOND; demux->adapter = gst_adapter_new (); demux->flowcombiner = gst_flow_combiner_new (); g_rw_lock_init (&demux->metadata_lock); demux->src = g_ptr_array_new (); demux->essence_tracks = g_array_new (FALSE, FALSE, sizeof (GstMXFDemuxEssenceTrack)); gst_segment_init (&demux->segment, GST_FORMAT_TIME); gst_mxf_demux_reset (demux); }