From c9f6a8b58664319d7db5f90166012c55c92a3191 Mon Sep 17 00:00:00 2001 From: =?UTF-8?q?Sebastian=20Dr=C3=B6ge?= Date: Thu, 5 Feb 2009 21:29:29 +0100 Subject: mxfdemux: Protect the metadata with a lock against concurrent access --- gst/mxf/mxfdemux.c | 80 ++++++++++++++++++++++++++++++++++++++++-------------- gst/mxf/mxfdemux.h | 3 +- 2 files changed, 62 insertions(+), 21 deletions(-) (limited to 'gst') diff --git a/gst/mxf/mxfdemux.c b/gst/mxf/mxfdemux.c index b1595fd6..6fe2f279 100644 --- a/gst/mxf/mxfdemux.c +++ b/gst/mxf/mxfdemux.c @@ -215,6 +215,8 @@ gst_mxf_demux_reset_metadata (GstMXFDemux * demux) { GST_DEBUG_OBJECT (demux, "Resetting metadata"); + g_mutex_lock (demux->metadata_lock); + demux->update_metadata = TRUE; demux->metadata_resolved = FALSE; @@ -224,8 +226,10 @@ gst_mxf_demux_reset_metadata (GstMXFDemux * demux) if (demux->metadata) { g_hash_table_destroy (demux->metadata); - demux->metadata = NULL; } + demux->metadata = mxf_metadata_hash_table_new (); + + g_mutex_unlock (demux->metadata_lock); } static void @@ -1159,11 +1163,6 @@ gst_mxf_demux_handle_metadata (GstMXFDemux * demux, const MXFUL * key, return GST_FLOW_ERROR; } - demux->update_metadata = TRUE; - - if (!demux->metadata) - demux->metadata = mxf_metadata_hash_table_new (); - old = g_hash_table_lookup (demux->metadata, &MXF_METADATA_BASE (metadata)->instance_uid); @@ -1195,6 +1194,9 @@ gst_mxf_demux_handle_metadata (GstMXFDemux * demux, const MXFUL * key, return GST_FLOW_OK; } + g_mutex_lock (demux->metadata_lock); + demux->update_metadata = TRUE; + if (MXF_IS_METADATA_PREFACE (metadata)) { demux->preface = MXF_METADATA_PREFACE (metadata); } @@ -1203,6 +1205,7 @@ gst_mxf_demux_handle_metadata (GstMXFDemux * demux, const MXFUL * key, g_hash_table_replace (demux->metadata, &MXF_METADATA_BASE (metadata)->instance_uid, metadata); + g_mutex_unlock (demux->metadata_lock); return ret; } @@ -1250,11 +1253,6 @@ gst_mxf_demux_handle_descriptive_metadata (GstMXFDemux * demux, return GST_FLOW_OK; } - demux->update_metadata = TRUE; - - if (!demux->metadata) - demux->metadata = mxf_metadata_hash_table_new (); - old = g_hash_table_lookup (demux->metadata, &MXF_METADATA_BASE (m)->instance_uid); @@ -1285,11 +1283,16 @@ gst_mxf_demux_handle_descriptive_metadata (GstMXFDemux * demux, return GST_FLOW_OK; } + g_mutex_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_mutex_unlock (demux->metadata_lock); + return ret; } @@ -2116,14 +2119,17 @@ next_try: /* resolve references etc */ + g_mutex_lock (demux->metadata_lock); 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; + g_mutex_unlock (demux->metadata_lock); goto next_try; } + g_mutex_unlock (demux->metadata_lock); out: if (buffer) @@ -2142,6 +2148,7 @@ gst_mxf_demux_handle_klv_packet (GstMXFDemux * demux, const MXFUL * key, #endif GstFlowReturn ret = GST_FLOW_OK; + g_mutex_lock (demux->metadata_lock); if (demux->update_metadata && demux->preface && (demux->offset >= @@ -2150,14 +2157,18 @@ gst_mxf_demux_handle_klv_packet (GstMXFDemux * demux, const MXFUL * key, mxf_is_generic_container_system_item (key) || mxf_is_generic_container_essence_element (key))) { demux->current_partition->parsed_metadata = TRUE; - if ((ret = gst_mxf_demux_resolve_references (demux)) != GST_FLOW_OK) - goto beach; - if ((ret = gst_mxf_demux_update_tracks (demux)) != GST_FLOW_OK) + if ((ret = gst_mxf_demux_resolve_references (demux)) != GST_FLOW_OK || + (ret = gst_mxf_demux_update_tracks (demux)) != GST_FLOW_OK) { + g_mutex_unlock (demux->metadata_lock); goto beach; + } } else if (demux->metadata_resolved && demux->requested_package_string) { - if ((ret = gst_mxf_demux_update_tracks (demux)) != GST_FLOW_OK) + if ((ret = gst_mxf_demux_update_tracks (demux)) != GST_FLOW_OK) { + g_mutex_unlock (demux->metadata_lock); goto beach; + } } + g_mutex_unlock (demux->metadata_lock); if (!mxf_is_mxf_packet (key)) { GST_WARNING_OBJECT (demux, @@ -2925,11 +2936,15 @@ gst_mxf_demux_seek_push (GstMXFDemux * demux, GstEvent * event) gboolean ret; guint64 new_offset = -1; + g_mutex_lock (demux->metadata_lock); 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) + gst_mxf_demux_update_tracks (demux) != GST_FLOW_OK) { + g_mutex_unlock (demux->metadata_lock); goto unresolved_metadata; + } } + g_mutex_unlock (demux->metadata_lock); /* Do the actual seeking */ for (i = 0; i < demux->src->len; i++) { @@ -3069,11 +3084,15 @@ gst_mxf_demux_seek_pull (GstMXFDemux * demux, GstEvent * event) if (flush || seeksegment.last_stop != demux->segment.last_stop) { guint64 new_offset = -1; + g_mutex_lock (demux->metadata_lock); 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) + gst_mxf_demux_update_tracks (demux) != GST_FLOW_OK) { + g_mutex_unlock (demux->metadata_lock); goto unresolved_metadata; + } } + g_mutex_unlock (demux->metadata_lock); /* Do the actual seeking */ for (i = 0; i < demux->src->len; i++) { @@ -3238,16 +3257,21 @@ gst_mxf_demux_src_query (GstPad * pad, GstQuery * query) goto error; pos = mxfpad->last_stop; + + g_mutex_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) + || mxfpad->material_track->edit_rate.d == 0) { + g_mutex_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_mutex_unlock (demux->metadata_lock); GST_DEBUG_OBJECT (pad, "Returning position %" G_GINT64_FORMAT " in format %s", pos, @@ -3266,20 +3290,26 @@ gst_mxf_demux_src_query (GstPad * pad, GstQuery * query) if (format != GST_FORMAT_TIME && format != GST_FORMAT_DEFAULT) goto error; - if (!mxfpad->material_track || !mxfpad->material_track->parent.sequence) + g_mutex_lock (demux->metadata_lock); + if (!mxfpad->material_track || !mxfpad->material_track->parent.sequence) { + g_mutex_unlock (demux->metadata_lock); goto error; + } duration = mxfpad->material_track->parent.sequence->duration; if (format == GST_FORMAT_TIME) { if (mxfpad->material_track->edit_rate.n == 0 || - mxfpad->material_track->edit_rate.d == 0) + mxfpad->material_track->edit_rate.d == 0) { + g_mutex_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_mutex_unlock (demux->metadata_lock); GST_DEBUG_OBJECT (pad, "Returning duration %" G_GINT64_FORMAT " in format %s", duration, @@ -3517,6 +3547,7 @@ gst_mxf_demux_query (GstElement * element, GstQuery * query) if (demux->src->len == 0) goto done; + g_mutex_lock (demux->metadata_lock); for (i = 0; i < demux->src->len; i++) { GstMXFDemuxPad *pad = g_ptr_array_index (demux->src, i); gint64 pdur = -1; @@ -3535,6 +3566,7 @@ gst_mxf_demux_query (GstElement * element, GstQuery * query) pad->material_track->edit_rate.n); duration = MAX (duration, pdur); } + g_mutex_unlock (demux->metadata_lock); if (duration == -1) { GST_DEBUG_OBJECT (demux, "No duration known (yet)"); @@ -3658,6 +3690,13 @@ gst_mxf_demux_finalize (GObject * object) g_ptr_array_free (demux->src, TRUE); demux->src = NULL; + g_hash_table_destroy (demux->metadata); + + if (demux->metadata_lock) { + g_mutex_free (demux->metadata_lock); + demux->metadata_lock = NULL; + } + G_OBJECT_CLASS (parent_class)->finalize (object); } @@ -3728,6 +3767,7 @@ gst_mxf_demux_init (GstMXFDemux * demux, GstMXFDemuxClass * g_class) demux->adapter = gst_adapter_new (); demux->src = g_ptr_array_new (); + demux->metadata_lock = g_mutex_new (); gst_segment_init (&demux->segment, GST_FORMAT_TIME); gst_mxf_demux_reset (demux); diff --git a/gst/mxf/mxfdemux.h b/gst/mxf/mxfdemux.h index 8e64e403..23d63c36 100644 --- a/gst/mxf/mxfdemux.h +++ b/gst/mxf/mxfdemux.h @@ -150,7 +150,8 @@ struct _GstMXFDemux GArray *random_index_pack; - /* Structural metadata */ + /* Metadata */ + GMutex *metadata_lock; gboolean update_metadata; gboolean pull_footer_metadata; -- cgit v1.2.1