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gstreamer/gst/mxf/mxfdemux.c

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/* GStreamer
* Copyright (C) 2008-2009 Sebastian Dröge <sebastian.droege@collabora.co.uk>
*
* This library is free software; you can redistribute it and/or
* modify it under the terms of the GNU Library General Public
* License as published by the Free Software Foundation; either
* version 2 of the License, or (at your option) any later version.
*
* This library is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
* Library General Public License for more details.
*
* You should have received a copy of the GNU Library General Public
* License along with this library; if not, write to the
* Free Software Foundation, Inc., 59 Temple Place - Suite 330,
* Boston, MA 02111-1307, USA.
*/
/**
* SECTION:element-mxfdemux
*
* mxfdemux demuxes an MXF file into the different contained streams.
*
* <refsect2>
* <title>Example launch line</title>
* |[
* 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.
* </refsect2>
*/
/* TODO:
* - Differentiate UL and UUIDs, the former can define an object system
* (i.e. mxf_ul_is_a() and friends could be implemented), see SMPTE S336M.
* The latter are just 16 byte unique identifiers
* - Check everything for correctness vs. SMPTE S336M, some things can probably
* be generalized/simplified
* - Seeking support: Use IndexTableSegments
* - Handle timecode tracks correctly (where is this documented?)
* - Handle Generic container system items
* - Implement correct support for clip-wrapped essence elements.
* - Add a "tracks" property to select the tracks that should be used from the
* selected package.
* - 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
*
* - Implement a muxer ;-)
*/
#ifdef HAVE_CONFIG_H
#include "config.h"
#endif
#include "mxfdemux.h"
#include "mxfparse.h"
#include "mxfmetadata.h"
#include <string.h>
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
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_free (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->last_stop = 0;
}
enum
{
PROP_0,
PROP_PACKAGE,
PROP_MAX_DRIFT
};
static gboolean gst_mxf_demux_sink_event (GstPad * pad, GstEvent * event);
static gboolean gst_mxf_demux_src_event (GstPad * pad, GstEvent * event);
static const GstQueryType *gst_mxf_demux_src_query_type (GstPad * pad);
static gboolean gst_mxf_demux_src_query (GstPad * pad, GstQuery * query);
GST_BOILERPLATE (GstMXFDemux, gst_mxf_demux, GstElement, GST_TYPE_ELEMENT);
static void
gst_mxf_demux_remove_pad (GstMXFDemuxPad * pad, GstMXFDemux * demux)
{
gst_element_remove_pad (GST_ELEMENT (demux), GST_PAD (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_free (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_mutex_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 ();
g_mutex_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);
}
static GstFlowReturn
gst_mxf_demux_combine_flows (GstMXFDemux * demux,
GstMXFDemuxPad * pad, GstFlowReturn ret)
{
guint i;
/* store the value */
pad->last_flow = ret;
/* any other error that is not-linked can be returned right away */
if (ret != GST_FLOW_NOT_LINKED)
goto done;
/* only return NOT_LINKED if all other pads returned NOT_LINKED */
for (i = 0; i < demux->src->len; i++) {
GstMXFDemuxPad *opad = g_ptr_array_index (demux->src, i);
if (opad == NULL)
continue;
ret = opad->last_flow;
/* some other return value (must be SUCCESS but we can return
* other values as well) */
if (ret != GST_FLOW_NOT_LINKED)
goto done;
}
/* if we get here, all other pads were unlinked and we return
* NOT_LINKED then */
done:
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_SIZE (*buffer) != size)) {
GST_WARNING_OBJECT (demux,
"partial pull got %u when expecting %u from offset %" G_GUINT64_FORMAT,
GST_BUFFER_SIZE (*buffer), size, offset);
gst_buffer_unref (*buffer);
ret = GST_FLOW_UNEXPECTED;
*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;
GST_DEBUG_OBJECT (demux,
"Handling partition pack of size %u at offset %"
G_GUINT64_FORMAT, GST_BUFFER_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;
}
}
if (!mxf_partition_pack_parse (key, &partition,
GST_BUFFER_DATA (buffer), GST_BUFFER_SIZE (buffer))) {
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)
{
GST_DEBUG_OBJECT (demux,
"Handling primer pack of size %u at offset %"
G_GUINT64_FORMAT, GST_BUFFER_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;
}
if (!mxf_primer_pack_parse (key, &demux->current_partition->primer,
GST_BUFFER_DATA (buffer), GST_BUFFER_SIZE (buffer))) {
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;
#if GLIB_CHECK_VERSION (2, 16, 0)
GHashTableIter iter;
#else
GList *l, *values;
#endif
MXFMetadataBase *m = NULL;
GST_DEBUG_OBJECT (demux, "Resolve metadata references");
demux->update_metadata = FALSE;
if (!demux->metadata) {
GST_ERROR_OBJECT (demux, "No metadata yet");
return GST_FLOW_ERROR;
}
#if GLIB_CHECK_VERSION (2, 16, 0)
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;
}
#else
values = g_hash_table_get_values (demux->metadata);
for (l = values; l; l = l->next) {
m = l->data;
m->resolved = MXF_METADATA_BASE_RESOLVE_STATE_NONE;
}
#endif
#if GLIB_CHECK_VERSION (2, 16, 0)
g_hash_table_iter_init (&iter, demux->metadata);
while (g_hash_table_iter_next (&iter, NULL, (gpointer) & m)) {
gboolean resolved;
#else
for (l = values; l; l = l->next) {
gboolean resolved;
m = l->data;
#endif
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;
#if !GLIB_CHECK_VERSION (2, 16, 0)
g_list_free (values);
#endif
return ret;
error:
#if !GLIB_CHECK_VERSION (2, 16, 0)
g_list_free (values);
#endif
demux->metadata_resolved = FALSE;
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 (memcmp (&ret->package_uid, &demux->current_package_uid, 32) != 0) {
gchar current_package_string[96];
GstTagList *tags = gst_tag_list_new ();
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");
gst_tag_list_add (tags, GST_TAG_MERGE_REPLACE, GST_TAG_MXF_UMID,
demux->current_package_string, NULL);
gst_element_found_tags (GST_ELEMENT_CAST (demux), tags);
}
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_free (etrack->tags);
etrack->tags = NULL;
etrack->handler = mxf_essence_element_handler_find (track);
if (!etrack->handler) {
gchar essence_container[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) {
name = g_strdup_printf ("video/x-mxf-%s", essence_container);
} else if (track->parent.type == MXF_METADATA_TRACK_SOUND_ESSENCE) {
name = g_strdup_printf ("audio/x-mxf-%s", essence_container);
} else {
name = g_strdup_printf ("application/x-mxf-%s", essence_container);
}
caps = gst_caps_new_simple (name, NULL);
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);
if (etrack->tags)
gst_tag_list_free (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;
}
etrack->source_package = package;
etrack->source_track = track;
continue;
next:
if (new) {
g_free (etrack->mapping_data);
if (etrack->tags)
gst_tag_list_free (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;
GST_DEBUG_OBJECT (demux, "Updating tracks");
if ((ret = gst_mxf_demux_update_essence_tracks (demux)) != GST_FLOW_OK) {
return ret;
}
current_package = gst_mxf_demux_choose_package (demux);
if (!current_package) {
GST_ERROR_OBJECT (demux, "Unable to find current package");
return GST_FLOW_ERROR;
} else if (!current_package->tracks) {
GST_ERROR_OBJECT (demux, "Current package has no (resolved) tracks");
return GST_FLOW_ERROR;
} else if (!current_package->n_essence_tracks) {
GST_ERROR_OBJECT (demux, "Current package has no essence tracks");
return GST_FLOW_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;
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
return GST_FLOW_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->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
return GST_FLOW_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
return GST_FLOW_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
return GST_FLOW_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
return GST_FLOW_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
return GST_FLOW_ERROR;
}
if (!source_package->descriptors) {
GST_WARNING_OBJECT (demux, "Source package has no descriptors");
if (!pad)
continue;
else
return GST_FLOW_ERROR;
}
if (!source_track->parent.descriptor) {
GST_WARNING_OBJECT (demux, "No descriptor found for track");
if (!pad)
continue;
else
return GST_FLOW_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 (!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.n != source_track->edit_rate.n) {
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);
}
if (GST_PAD_CAPS (pad)
&& !gst_caps_is_equal (GST_PAD_CAPS (pad), etrack->caps)) {
gst_pad_set_caps (GST_PAD_CAST (pad), etrack->caps);
} else if (!GST_PAD_CAPS (pad)) {
gst_pad_set_caps (GST_PAD_CAST (pad), etrack->caps);
gst_pad_set_event_function (GST_PAD_CAST (pad),
GST_DEBUG_FUNCPTR (gst_mxf_demux_src_event));
gst_pad_set_query_type_function (GST_PAD_CAST (pad),
GST_DEBUG_FUNCPTR (gst_mxf_demux_src_query_type));
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);
gst_element_add_pad (GST_ELEMENT_CAST (demux), gst_object_ref (pad));
g_ptr_array_add (demux->src, pad);
pad->discont = TRUE;
}
}
if (first_run)
gst_element_no_more_pads (GST_ELEMENT_CAST (demux));
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");
return GST_FLOW_ERROR;
}
}
} else {
GST_ERROR_OBJECT (demux, "Couldn't create any streams");
return GST_FLOW_ERROR;
}
return GST_FLOW_OK;
}
static GstFlowReturn
gst_mxf_demux_handle_metadata (GstMXFDemux * demux, const MXFUL * key,
GstBuffer * buffer)
{
guint16 type;
MXFMetadata *metadata = NULL, *old = NULL;
GstFlowReturn ret = GST_FLOW_OK;
type = GST_READ_UINT16_BE (key->u + 13);
GST_DEBUG_OBJECT (demux,
"Handling metadata of size %u at offset %"
G_GUINT64_FORMAT " of type 0x%04x", GST_BUFFER_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;
}
metadata =
mxf_metadata_new (type, &demux->current_partition->primer, demux->offset,
GST_BUFFER_DATA (buffer), GST_BUFFER_SIZE (buffer));
if (!metadata) {
GST_ERROR_OBJECT (demux, "Parsing metadata failed");
return GST_FLOW_ERROR;
}
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_ul_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)));
gst_mini_object_unref (GST_MINI_OBJECT (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_ul_to_string (&MXF_METADATA_BASE (metadata)->instance_uid, str));
gst_mini_object_unref (GST_MINI_OBJECT (metadata));
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);
}
gst_mxf_demux_reset_linked_metadata (demux);
g_hash_table_replace (demux->metadata,
&MXF_METADATA_BASE (metadata)->instance_uid, metadata);
g_mutex_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;
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 %u at offset %"
G_GUINT64_FORMAT " with scheme 0x%02x and type 0x%06x",
GST_BUFFER_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;
}
m = mxf_descriptive_metadata_new (scheme, type,
&demux->current_partition->primer, demux->offset,
GST_BUFFER_DATA (buffer), GST_BUFFER_SIZE (buffer));
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_ul_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)));
gst_mini_object_unref (GST_MINI_OBJECT (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_ul_to_string (&MXF_METADATA_BASE (m)->instance_uid, str));
gst_mini_object_unref (GST_MINI_OBJECT (m));
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;
}
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 %u"
" at offset %" G_GUINT64_FORMAT, GST_BUFFER_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;
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_UNEXPECTED;
}
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->descriptors) {
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.n != source_track->edit_rate.n) {
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;
if (!gst_caps_is_equal (GST_PAD_CAPS (pad), pad->current_essence_track->caps)) {
gst_pad_set_caps (GST_PAD_CAST (pad), pad->current_essence_track->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_UNEXPECTED) {
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 %u"
" at offset %" G_GUINT64_FORMAT, GST_BUFFER_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_create_sub (buffer, 0, GST_BUFFER_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;
gst_buffer_set_caps (inbuf, etrack->caps);
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->last_stop < pad->last_stop &&
pad->last_stop - earliest->last_stop > 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_create_sub (inbuf, 0, GST_BUFFER_SIZE (inbuf));
GST_BUFFER_TIMESTAMP (outbuf) = pad->last_stop;
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->last_stop_accumulated_error +=
((gdouble) abs_error) /
((gdouble) pad->current_essence_track->source_track->edit_rate.n);
}
if (pad->last_stop_accumulated_error >= 1.0) {
GST_BUFFER_DURATION (outbuf) += 1;
pad->last_stop_accumulated_error -= 1.0;
}
if (pad->need_segment) {
if (demux->close_seg_event)
gst_pad_push_event (GST_PAD_CAST (pad),
gst_event_ref (demux->close_seg_event));
gst_pad_push_event (GST_PAD_CAST (pad),
gst_event_new_new_segment (FALSE, demux->segment.rate,
GST_FORMAT_TIME, demux->segment.start, demux->segment.stop,
GST_BUFFER_TIMESTAMP (outbuf)));
pad->need_segment = FALSE;
}
if (pad->tags) {
gst_element_found_tags_for_pad (GST_ELEMENT_CAST (demux),
GST_PAD_CAST (pad), pad->tags);
pad->tags = NULL;
}
pad->last_stop += GST_BUFFER_DURATION (outbuf);
GST_DEBUG_OBJECT (demux,
"Pushing buffer of size %u for track %u: timestamp %" GST_TIME_FORMAT
" duration %" GST_TIME_FORMAT, GST_BUFFER_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->last_stop > demux->segment.last_stop)
gst_segment_set_last_stop (&demux->segment, GST_FORMAT_TIME,
pad->last_stop);
if (ret != GST_FLOW_OK)
break;
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_UNEXPECTED) {
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_UNEXPECTED;
}
} 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_UNEXPECTED;
}
if (ret == GST_FLOW_UNEXPECTED) {
GST_DEBUG_OBJECT (demux, "EOS for track");
pad->eos = TRUE;
gst_pad_push_event (GST_PAD_CAST (pad), gst_event_new_eos ());
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;
GST_DEBUG_OBJECT (demux,
"Handling random index pack of size %u at offset %"
G_GUINT64_FORMAT, GST_BUFFER_SIZE (buffer), demux->offset);
if (demux->random_index_pack) {
GST_DEBUG_OBJECT (demux, "Already parsed random index pack");
return GST_FLOW_OK;
}
if (!mxf_random_index_pack_parse (key, GST_BUFFER_DATA (buffer),
GST_BUFFER_SIZE (buffer), &demux->random_index_pack)) {
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;
GST_DEBUG_OBJECT (demux,
"Handling index table segment of size %u at offset %"
G_GUINT64_FORMAT, GST_BUFFER_SIZE (buffer), demux->offset);
if (!demux->current_partition->primer.mappings) {
GST_WARNING_OBJECT (demux, "Invalid primer pack");
}
segment = g_new0 (MXFIndexTableSegment, 1);
if (!mxf_index_table_segment_parse (key, segment,
&demux->current_partition->primer, GST_BUFFER_DATA (buffer),
GST_BUFFER_SIZE (buffer))) {
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;
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;
data = GST_BUFFER_DATA (buffer);
memcpy (key, GST_BUFFER_DATA (buffer), 16);
/* Decode BER encoded packet length */
if ((data[16] & 0x80) == 0) {
length = data[16];
data_offset = 17;
} else {
guint slen = data[16] & 0x7f;
data_offset = 16 + 1 + slen;
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;
data = GST_BUFFER_DATA (buffer);
length = 0;
while (slen) {
length = (length << 8) | *data;
data++;
slen--;
}
}
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;
}
/* 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;
}
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;
if (!gst_pad_query_peer_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);
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;
}
pack_size = GST_READ_UINT32_BE (GST_BUFFER_DATA (buffer));
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;
}
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;
}
memcpy (&key, GST_BUFFER_DATA (buffer), 16);
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 */
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)
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;
g_mutex_lock (demux->metadata_lock);
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) {
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) {
g_mutex_unlock (demux->metadata_lock);
goto beach;
}
}
g_mutex_unlock (demux->metadata_lock);
if (!mxf_is_mxf_packet (key)) {
GST_WARNING_OBJECT (demux,
"Skipping non-MXF packet of size %u at offset %"
G_GUINT64_FORMAT ", key: %s", GST_BUFFER_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 %u at offset %"
G_GUINT64_FORMAT, GST_BUFFER_SIZE (buffer), demux->offset);
} else {
GST_DEBUG_OBJECT (demux,
"Skipping unknown packet of size %u at offset %"
G_GUINT64_FORMAT ", key: %s", GST_BUFFER_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;
guint 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_UNEXPECTED) {
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) {
p->eos = TRUE;
gst_pad_push_event (GST_PAD_CAST (p), gst_event_new_eos ());
}
}
}
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_UNEXPECTED && 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_UNEXPECTED;
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_UNEXPECTED && 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) {
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;
}
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.last_stop - earliest->last_stop > 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) {
GST_WARNING_OBJECT (demux,
"Failed to find offset for late essence track");
earliest->eos = TRUE;
gst_pad_push_event (GST_PAD_CAST (earliest), gst_event_new_eos ());
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;
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;
if ((ret =
gst_mxf_demux_pull_range (demux, demux->offset, 16,
&buffer)) != GST_FLOW_OK)
break;
if (mxf_is_header_partition_pack ((const MXFUL *)
GST_BUFFER_DATA (buffer))) {
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.last_stop >= 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->last_stop < demux->segment.stop) {
eos = FALSE;
break;
}
}
if (eos) {
ret = GST_FLOW_UNEXPECTED;
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 (GST_FLOW_IS_FATAL (ret) || ret == GST_FLOW_NOT_LINKED) {
if (ret == GST_FLOW_UNEXPECTED) {
/* perform EOS logic */
if (demux->segment.flags & GST_SEEK_FLAG_SEGMENT) {
gint64 stop;
/* 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");
gst_element_post_message (GST_ELEMENT_CAST (demux),
gst_message_new_segment_done (GST_OBJECT_CAST (demux),
GST_FORMAT_TIME, stop));
} else {
/* normal playback, send EOS to all linked pads */
GST_LOG_OBJECT (demux, "Sending EOS, at end of stream");
if (!gst_mxf_demux_push_src_event (demux, gst_event_new_eos ())) {
GST_WARNING_OBJECT (demux, "failed pushing EOS on streams");
}
}
} else {
GST_ELEMENT_ERROR (demux, STREAM, FAILED,
("Internal data stream error."),
("stream stopped, reason %s", reason));
gst_mxf_demux_push_src_event (demux, gst_event_new_eos ());
}
}
gst_object_unref (demux);
return;
}
}
static GstFlowReturn
gst_mxf_demux_chain (GstPad * pad, 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;
demux = GST_MXF_DEMUX (gst_pad_get_parent (pad));
GST_LOG_OBJECT (demux, "received buffer of %u bytes at offset %"
G_GUINT64_FORMAT, GST_BUFFER_SIZE (inbuf), GST_BUFFER_OFFSET (inbuf));
if (demux->src->len > 0) {
if (!gst_mxf_demux_get_earliest_pad (demux)) {
ret = GST_FLOW_UNEXPECTED;
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");
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_WRONG_STATE;
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_peek (demux->adapter, 16);
if (mxf_is_header_partition_pack ((const MXFUL *)
data)) {
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_peek (demux->adapter, 17);
memcpy (&key, data, 16);
/* 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;
/* 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_peek (demux->adapter, 17 + slen);
data += 17;
length = 0;
while (slen) {
length = (length << 8) | *data;
data++;
slen--;
}
}
/* 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;
}
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;
}
gst_object_unref (demux);
return ret;
}
static void
gst_mxf_demux_pad_set_last_stop (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->last_stop =
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->last_stop = start;
}
p->last_stop_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->last_stop = sum;
p->last_stop_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->last_stop = sum + gst_util_uint64_scale (essence_offset,
GST_SECOND * p->material_track->edit_rate.d,
p->material_track->edit_rate.n);
p->last_stop_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->last_stop =
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;
gst_event_parse_seek (event, &rate, &format, &flags,
&start_type, &start, &stop_type, &stop);
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_set_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.last_stop != demux->segment.last_stop) {
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) {
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++) {
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_last_stop (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);
ret = gst_pad_push_event (demux->sinkpad,
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));
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)
{
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;
gst_event_parse_seek (event, &rate, &format, &flags,
&start_type, &start, &stop_type, &stop);
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);
if (flush) {
/* Flush start up and downstream to make sure data flow and loops are
idle */
gst_mxf_demux_push_src_event (demux, gst_event_new_flush_start ());
gst_pad_push_event (demux->sinkpad, gst_event_new_flush_start ());
} else {
/* Pause the pulling task */
gst_pad_pause_task (demux->sinkpad);
}
/* Take the stream lock */
GST_PAD_STREAM_LOCK (demux->sinkpad);
if (flush) {
/* Stop flushing upstream we need to pull */
gst_pad_push_event (demux->sinkpad, gst_event_new_flush_stop ());
}
/* 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_set_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.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) {
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++) {
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_last_stop (demux, p, start);
position = p->current_essence_track_position;
off =
gst_mxf_demux_find_essence_element (demux, p->current_essence_track,
&position, keyframe);
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->last_flow -=
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.d);
}
p->current_essence_track_position = position;
}
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) {
/* Stop flushing, the sinks are at time 0 now */
gst_mxf_demux_push_src_event (demux, gst_event_new_flush_stop ());
} 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_new_segment (TRUE,
demux->segment.rate, demux->segment.format,
demux->segment.start, demux->segment.last_stop, demux->segment.time);
}
/* 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) {
gst_element_post_message (GST_ELEMENT (demux),
gst_message_new_segment_start (GST_OBJECT (demux),
demux->segment.format, demux->segment.last_stop));
}
/* 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;
}
gst_pad_start_task (demux->sinkpad,
(GstTaskFunction) gst_mxf_demux_loop, demux->sinkpad);
GST_PAD_STREAM_UNLOCK (demux->sinkpad);
return TRUE;
/* 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);
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, GstEvent * event)
{
GstMXFDemux *demux = GST_MXF_DEMUX (gst_pad_get_parent (pad));
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;
}
gst_object_unref (demux);
return ret;
}
static const GstQueryType *
gst_mxf_demux_src_query_type (GstPad * pad)
{
static const GstQueryType types[] = {
GST_QUERY_POSITION,
GST_QUERY_DURATION,
0
};
return types;
}
static gboolean
gst_mxf_demux_src_query (GstPad * pad, GstQuery * query)
{
GstMXFDemux *demux = GST_MXF_DEMUX (gst_pad_get_parent (pad));
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->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) {
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,
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_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 (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_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,
gst_format_get_name (format));
gst_query_set_duration (query, format, duration);
ret = TRUE;
break;
}
default:
/* else forward upstream */
ret = gst_pad_peer_query (demux->sinkpad, query);
break;
}
done:
gst_object_unref (demux);
return ret;
/* ERRORS */
error:
{
GST_DEBUG_OBJECT (pad, "query failed");
goto done;
}
}
static gboolean
gst_mxf_demux_sink_activate (GstPad * sinkpad)
{
if (gst_pad_check_pull_range (sinkpad)) {
return gst_pad_activate_pull (sinkpad, TRUE);
} else {
return gst_pad_activate_push (sinkpad, TRUE);
}
}
static gboolean
gst_mxf_demux_sink_activate_push (GstPad * sinkpad, gboolean active)
{
GstMXFDemux *demux;
demux = GST_MXF_DEMUX (gst_pad_get_parent (sinkpad));
demux->random_access = FALSE;
gst_object_unref (demux);
return TRUE;
}
static gboolean
gst_mxf_demux_sink_activate_pull (GstPad * sinkpad, gboolean active)
{
GstMXFDemux *demux;
demux = GST_MXF_DEMUX (gst_pad_get_parent (sinkpad));
if (active) {
demux->random_access = TRUE;
gst_object_unref (demux);
return gst_pad_start_task (sinkpad, (GstTaskFunction) gst_mxf_demux_loop,
sinkpad);
} else {
demux->random_access = FALSE;
gst_object_unref (demux);
return gst_pad_stop_task (sinkpad);
}
}
static gboolean
gst_mxf_demux_sink_event (GstPad * pad, GstEvent * event)
{
GstMXFDemux *demux;
gboolean ret = FALSE;
demux = GST_MXF_DEMUX (gst_pad_get_parent (pad));
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_mxf_demux_push_src_event (demux, 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_mxf_demux_push_src_event (demux, 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");
}
}
if (!(ret = gst_mxf_demux_push_src_event (demux, event)))
GST_WARNING_OBJECT (pad, "failed pushing EOS on streams");
break;
}
case GST_EVENT_NEWSEGMENT:{
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;
gst_event_unref (event);
ret = TRUE;
break;
}
default:
ret = gst_mxf_demux_push_src_event (demux, event);
break;
}
out:
gst_object_unref (demux);
return ret;
}
static const GstQueryType *
gst_mxf_demux_get_query_types (GstElement * element)
{
static const GstQueryType types[] = {
GST_QUERY_POSITION,
GST_QUERY_DURATION,
0
};
return types;
}
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.last_stop;
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_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;
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_mutex_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;
}
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:
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;
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->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);
if (demux->metadata_lock) {
g_mutex_free (demux->metadata_lock);
demux->metadata_lock = NULL;
}
G_OBJECT_CLASS (parent_class)->finalize (object);
}
static void
gst_mxf_demux_base_init (gpointer g_class)
{
GstElementClass *element_class = GST_ELEMENT_CLASS (g_class);
gst_element_class_add_pad_template (element_class,
gst_static_pad_template_get (&mxf_sink_template));
gst_element_class_add_pad_template (element_class,
gst_static_pad_template_get (&mxf_src_template));
gst_element_class_set_details_simple (element_class, "MXF Demuxer",
"Codec/Demuxer",
"Demux MXF files", "Sebastian Dröge <sebastian.droege@collabora.co.uk>");
}
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");
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));
gstelement_class->change_state =
GST_DEBUG_FUNCPTR (gst_mxf_demux_change_state);
gstelement_class->query = GST_DEBUG_FUNCPTR (gst_mxf_demux_query);
gstelement_class->get_query_types =
GST_DEBUG_FUNCPTR (gst_mxf_demux_get_query_types);
}
static void
gst_mxf_demux_init (GstMXFDemux * demux, GstMXFDemuxClass * g_class)
{
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_activatepull_function (demux->sinkpad,
GST_DEBUG_FUNCPTR (gst_mxf_demux_sink_activate_pull));
gst_pad_set_activatepush_function (demux->sinkpad,
GST_DEBUG_FUNCPTR (gst_mxf_demux_sink_activate_push));
gst_element_add_pad (GST_ELEMENT (demux), demux->sinkpad);
demux->max_drift = 500 * GST_MSECOND;
demux->adapter = gst_adapter_new ();
demux->metadata_lock = g_mutex_new ();
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);
}
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