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gstreamer/gst/mxf/mxfmux.c
Sebastian Dröge 50424e44ad mxfmux: Small cleanup
2009-04-13 13:33:00 +02:00

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/* GStreamer
* Copyright (C) 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.
*/
#ifdef HAVE_CONFIG_H
#include "config.h"
#endif
#include <math.h>
#include <string.h>
#include "mxfmux.h"
#ifdef HAVE_SYS_UTSNAME_H
#include <sys/utsname.h>
#endif
GST_DEBUG_CATEGORY_STATIC (mxfmux_debug);
#define GST_CAT_DEFAULT mxfmux_debug
static GstStaticPadTemplate src_templ = GST_STATIC_PAD_TEMPLATE ("src",
GST_PAD_SRC,
GST_PAD_ALWAYS,
GST_STATIC_CAPS ("application/mxf")
);
enum
{
PROP_0
};
GST_BOILERPLATE (GstMXFMux, gst_mxf_mux, GstElement, GST_TYPE_ELEMENT);
static void gst_mxf_mux_finalize (GObject * object);
static void gst_mxf_mux_set_property (GObject * object,
guint prop_id, const GValue * value, GParamSpec * pspec);
static void gst_mxf_mux_get_property (GObject * object,
guint prop_id, GValue * value, GParamSpec * pspec);
static GstFlowReturn gst_mxf_mux_collected (GstCollectPads * pads,
gpointer user_data);
static gboolean gst_mxf_mux_handle_src_event (GstPad * pad, GstEvent * event);
static GstPad *gst_mxf_mux_request_new_pad (GstElement * element,
GstPadTemplate * templ, const gchar * name);
static void gst_mxf_mux_release_pad (GstElement * element, GstPad * pad);
static GstStateChangeReturn
gst_mxf_mux_change_state (GstElement * element, GstStateChange transition);
static void gst_mxf_mux_reset (GstMXFMux * mux);
static GstFlowReturn
gst_mxf_mux_push (GstMXFMux * mux, GstBuffer * buf)
{
guint size = GST_BUFFER_SIZE (buf);
GstFlowReturn ret;
gst_buffer_set_caps (buf, GST_PAD_CAPS (mux->srcpad));
ret = gst_pad_push (mux->srcpad, buf);
mux->offset += size;
return ret;
}
static void
gst_mxf_mux_base_init (gpointer g_class)
{
GstElementClass *element_class = GST_ELEMENT_CLASS (g_class);
const GstPadTemplate **p;
gst_element_class_add_pad_template (element_class,
gst_static_pad_template_get (&src_templ));
p = mxf_essence_element_writer_get_pad_templates ();
while (p && *p) {
gst_element_class_add_pad_template (element_class,
(GstPadTemplate *) gst_object_ref (GST_OBJECT (*p)));
p++;
}
gst_element_class_set_details_simple (element_class, "MXF muxer",
"Codec/Muxer",
"Muxes video/audio streams into a MXF stream",
"Sebastian Dröge <sebastian.droege@collabora.co.uk>");
}
static void
gst_mxf_mux_class_init (GstMXFMuxClass * klass)
{
GObjectClass *gobject_class;
GstElementClass *gstelement_class;
GST_DEBUG_CATEGORY_INIT (mxfmux_debug, "mxfmux", 0, "MXF muxer");
gobject_class = (GObjectClass *) klass;
gstelement_class = (GstElementClass *) klass;
gobject_class->finalize = gst_mxf_mux_finalize;
gobject_class->set_property = gst_mxf_mux_set_property;
gobject_class->get_property = gst_mxf_mux_get_property;
gstelement_class->change_state = GST_DEBUG_FUNCPTR (gst_mxf_mux_change_state);
gstelement_class->request_new_pad =
GST_DEBUG_FUNCPTR (gst_mxf_mux_request_new_pad);
gstelement_class->release_pad = GST_DEBUG_FUNCPTR (gst_mxf_mux_release_pad);
}
static void
gst_mxf_mux_init (GstMXFMux * mux, GstMXFMuxClass * g_class)
{
GstCaps *caps;
mux->srcpad = gst_pad_new_from_static_template (&src_templ, "src");
gst_pad_set_event_function (mux->srcpad, gst_mxf_mux_handle_src_event);
caps = gst_caps_new_simple ("application/mxf", NULL);
gst_pad_set_caps (mux->srcpad, caps);
gst_caps_unref (caps);
gst_element_add_pad (GST_ELEMENT (mux), mux->srcpad);
mux->collect = gst_collect_pads_new ();
gst_collect_pads_set_function (mux->collect,
(GstCollectPadsFunction) GST_DEBUG_FUNCPTR (gst_mxf_mux_collected), mux);
gst_mxf_mux_reset (mux);
}
static void
gst_mxf_mux_finalize (GObject * object)
{
GstMXFMux *mux = GST_MXF_MUX (object);
gst_mxf_mux_reset (mux);
if (mux->metadata) {
g_hash_table_destroy (mux->metadata);
mux->metadata = NULL;
}
gst_object_unref (mux->collect);
G_OBJECT_CLASS (parent_class)->finalize (object);
}
static void
gst_mxf_mux_set_property (GObject * object,
guint prop_id, const GValue * value, GParamSpec * pspec)
{
//GstMXFMux *mux = GST_MXF_MUX (object);
switch (prop_id) {
default:
G_OBJECT_WARN_INVALID_PROPERTY_ID (object, prop_id, pspec);
break;
}
}
static void
gst_mxf_mux_get_property (GObject * object,
guint prop_id, GValue * value, GParamSpec * pspec)
{
//GstMXFMux *mux = GST_MXF_MUX (object);
switch (prop_id) {
default:
G_OBJECT_WARN_INVALID_PROPERTY_ID (object, prop_id, pspec);
break;
}
}
static void
gst_mxf_mux_reset (GstMXFMux * mux)
{
GSList *sl;
while ((sl = mux->collect->data) != NULL) {
GstMXFMuxPad *cpad = (GstMXFMuxPad *) sl->data;
gst_object_unref (cpad->adapter);
g_free (cpad->mapping_data);
gst_collect_pads_remove_pad (mux->collect, cpad->collect.pad);
}
mux->state = GST_MXF_MUX_STATE_HEADER;
mux->n_pads = 0;
if (mux->metadata) {
g_hash_table_destroy (mux->metadata);
mux->preface = NULL;
}
mux->metadata = mxf_metadata_hash_table_new ();
mxf_partition_pack_reset (&mux->partition);
mxf_primer_pack_reset (&mux->primer);
memset (&mux->min_edit_rate, 0, sizeof (MXFFraction));
mux->last_gc_timestamp = 0;
mux->last_gc_position = 0;
mux->offset = 0;
}
static gboolean
gst_mxf_mux_handle_src_event (GstPad * pad, GstEvent * event)
{
GstEventType type;
type = event ? GST_EVENT_TYPE (event) : GST_EVENT_UNKNOWN;
switch (type) {
case GST_EVENT_SEEK:
/* disable seeking for now */
return FALSE;
default:
break;
}
return gst_pad_event_default (pad, event);
}
static gboolean
gst_mxf_mux_handle_sink_event (GstPad * pad, GstEvent * event)
{
GstMXFMux *mux = GST_MXF_MUX (gst_pad_get_parent (pad));
gboolean ret = TRUE;
switch (GST_EVENT_TYPE (event)) {
case GST_EVENT_TAG:
/* TODO: do something with the tags */
break;
case GST_EVENT_NEWSEGMENT:
/* We don't support NEWSEGMENT events */
ret = FALSE;
gst_event_unref (event);
break;
default:
break;
}
/* now GstCollectPads can take care of the rest, e.g. EOS */
if (ret)
ret = mux->collect_event (pad, event);
gst_object_unref (mux);
return ret;
}
static gboolean
gst_mxf_mux_setcaps (GstPad * pad, GstCaps * caps)
{
GstMXFMux *mux = GST_MXF_MUX (gst_pad_get_parent (pad));
GstMXFMuxPad *cpad = (GstMXFMuxPad *) gst_pad_get_element_private (pad);
gboolean ret = TRUE;
MXFUUID d_instance_uid = { {0,} };
MXFMetadataFileDescriptor *old_descriptor = cpad->descriptor;
GST_DEBUG_OBJECT (pad, "Setting caps %" GST_PTR_FORMAT, caps);
if (old_descriptor) {
memcpy (&d_instance_uid, &MXF_METADATA_BASE (old_descriptor)->instance_uid,
16);
cpad->descriptor = NULL;
g_free (cpad->mapping_data);
cpad->mapping_data = NULL;
}
cpad->descriptor =
cpad->writer->get_descriptor (gst_pad_get_pad_template (pad), caps,
&cpad->write_func, &cpad->mapping_data);
if (!cpad->descriptor) {
GST_ERROR_OBJECT (mux,
"Couldn't get descriptor for pad '%s' with caps %" GST_PTR_FORMAT,
GST_PAD_NAME (pad), caps);
gst_object_unref (mux);
return FALSE;
}
if (mxf_uuid_is_zero (&d_instance_uid))
mxf_uuid_init (&d_instance_uid, mux->metadata);
memcpy (&MXF_METADATA_BASE (cpad->descriptor)->instance_uid, &d_instance_uid,
16);
g_hash_table_replace (mux->metadata,
&MXF_METADATA_BASE (cpad->descriptor)->instance_uid, cpad->descriptor);
if (old_descriptor) {
if (mux->preface && mux->preface->content_storage &&
mux->preface->content_storage->packages) {
guint i, j;
for (i = 0; i < mux->preface->content_storage->n_packages; i++) {
MXFMetadataSourcePackage *package;
if (!MXF_IS_METADATA_SOURCE_PACKAGE (mux->preface->content_storage->
packages[i]))
continue;
package =
MXF_METADATA_SOURCE_PACKAGE (mux->preface->content_storage->
packages[i]);
if (!package->descriptor)
continue;
if (MXF_IS_METADATA_MULTIPLE_DESCRIPTOR (package->descriptor)) {
MXFMetadataMultipleDescriptor *tmp =
MXF_METADATA_MULTIPLE_DESCRIPTOR (package->descriptor);
for (j = 0; j < tmp->n_sub_descriptors; j++) {
if (tmp->sub_descriptors[j] ==
MXF_METADATA_GENERIC_DESCRIPTOR (old_descriptor)) {
tmp->sub_descriptors[j] =
MXF_METADATA_GENERIC_DESCRIPTOR (cpad->descriptor);
memcpy (&tmp->sub_descriptors_uids[j], &d_instance_uid, 16);
}
}
} else if (package->descriptor ==
MXF_METADATA_GENERIC_DESCRIPTOR (old_descriptor)) {
package->descriptor =
MXF_METADATA_GENERIC_DESCRIPTOR (cpad->descriptor);
memcpy (&package->descriptor_uid, &d_instance_uid, 16);
}
}
}
}
gst_object_unref (mux);
return ret;
}
static GstPad *
gst_mxf_mux_request_new_pad (GstElement * element,
GstPadTemplate * templ, const gchar * pad_name)
{
GstMXFMux *mux = GST_MXF_MUX (element);
GstMXFMuxPad *cpad;
GstPad *pad = NULL;
guint pad_number;
gchar *name = NULL;
const MXFEssenceElementWriter *writer;
if (mux->state != GST_MXF_MUX_STATE_HEADER) {
GST_WARNING_OBJECT (mux, "Can't request pads after writing header");
return NULL;
}
writer = mxf_essence_element_writer_find (templ);
if (!writer) {
GST_ERROR_OBJECT (mux, "Not our template");
return NULL;
}
pad_number = g_atomic_int_exchange_and_add ((gint *) & mux->n_pads, 1);
name = g_strdup_printf (GST_PAD_TEMPLATE_NAME_TEMPLATE (templ), pad_number);
GST_DEBUG_OBJECT (mux, "Creating pad '%s'", name);
pad = gst_pad_new_from_template (templ, name);
g_free (name);
cpad = (GstMXFMuxPad *)
gst_collect_pads_add_pad (mux->collect, pad, sizeof (GstMXFMuxPad));
cpad->last_timestamp = 0;
cpad->adapter = gst_adapter_new ();
cpad->writer = writer;
/* FIXME: hacked way to override/extend the event function of
* GstCollectPads; because it sets its own event function giving the
* element no access to events.
*/
mux->collect_event = (GstPadEventFunction) GST_PAD_EVENTFUNC (pad);
gst_pad_set_event_function (pad,
GST_DEBUG_FUNCPTR (gst_mxf_mux_handle_sink_event));
gst_pad_set_setcaps_function (pad, gst_mxf_mux_setcaps);
gst_pad_use_fixed_caps (pad);
gst_pad_set_active (pad, TRUE);
gst_element_add_pad (element, pad);
return pad;
}
static void
gst_mxf_mux_release_pad (GstElement * element, GstPad * pad)
{
/*GstMXFMux *mux = GST_MXF_MUX (GST_PAD_PARENT (pad));
GstMXFMuxPad *cpad = (GstMXFMuxPad *) gst_pad_get_element_private (pad);
gst_object_unref (cpad->adapter);
g_free (cpad->mapping_data);
gst_collect_pads_remove_pad (mux->collect, pad);
gst_element_remove_pad (element, pad); */
}
static GstFlowReturn
gst_mxf_mux_create_metadata (GstMXFMux * mux)
{
GstFlowReturn ret = GST_FLOW_OK;
GSList *l;
GArray *tmp;
GST_DEBUG_OBJECT (mux, "Creating MXF metadata");
for (l = mux->collect->data; l; l = l->next) {
GstMXFMuxPad *cpad = l->data;
if (!cpad || !cpad->descriptor || !GST_PAD_CAPS (cpad->collect.pad))
return GST_FLOW_ERROR;
if (cpad->writer->update_descriptor)
cpad->writer->update_descriptor (cpad->descriptor,
GST_PAD_CAPS (cpad->collect.pad), cpad->mapping_data,
cpad->collect.buffer);
}
/* Preface */
mux->preface =
(MXFMetadataPreface *) gst_mini_object_new (MXF_TYPE_METADATA_PREFACE);
mxf_uuid_init (&MXF_METADATA_BASE (mux->preface)->instance_uid,
mux->metadata);
g_hash_table_insert (mux->metadata,
&MXF_METADATA_BASE (mux->preface)->instance_uid, mux->preface);
mxf_timestamp_set_now (&mux->preface->last_modified_date);
mux->preface->version = 258;
mux->preface->object_model_version = 1;
mxf_op_set_generalized (&mux->preface->operational_pattern, MXF_OP_1a, TRUE,
TRUE, FALSE);
tmp = g_array_new (FALSE, FALSE, sizeof (MXFUL));
for (l = mux->collect->data; l; l = l->next) {
GstMXFMuxPad *cpad = l->data;
guint i;
gboolean found = FALSE;
if (!cpad || !cpad->descriptor ||
mxf_ul_is_zero (&cpad->descriptor->essence_container))
return GST_FLOW_ERROR;
for (i = 0; i < tmp->len; i++) {
if (mxf_ul_is_equal (&cpad->descriptor->essence_container,
&g_array_index (tmp, MXFUL, i))) {
found = TRUE;
break;
}
}
if (found)
continue;
g_array_append_val (tmp, cpad->descriptor->essence_container);
}
mux->preface->n_essence_containers = tmp->len;
mux->preface->essence_containers = (MXFUL *) g_array_free (tmp, FALSE);
/* This will later be used as UID for the material package */
mxf_uuid_init (&mux->preface->primary_package_uid, mux->metadata);
/* Identifications */
{
MXFMetadataIdentification *identification;
static const guint8 gst_uid[] = {
0xe5, 0xde, 0xcd, 0x04, 0x24, 0x90, 0x69, 0x18,
0x8a, 0xc9, 0xb5, 0xd7, 0x02, 0x58, 0x46, 0x78
};
guint major, minor, micro, nano;
mux->preface->n_identifications = 1;
mux->preface->identifications = g_new0 (MXFMetadataIdentification *, 1);
identification = mux->preface->identifications[0] =
(MXFMetadataIdentification *)
gst_mini_object_new (MXF_TYPE_METADATA_IDENTIFICATION);
mxf_uuid_init (&MXF_METADATA_BASE (identification)->instance_uid,
mux->metadata);
g_hash_table_insert (mux->metadata,
&MXF_METADATA_BASE (identification)->instance_uid, identification);
mxf_uuid_init (&identification->this_generation_uid, NULL);
identification->company_name = g_strdup ("GStreamer");
identification->product_name = g_strdup ("GStreamer Multimedia Framework");
gst_version (&major, &minor, &micro, &nano);
identification->product_version.major = major;
identification->product_version.minor = minor;
identification->product_version.patch = micro;
identification->product_version.build = nano;
identification->product_version.release =
(nano == 0) ? 1 : (nano == 1) ? 2 : 4;
identification->version_string =
g_strdup_printf ("%u.%u.%u.%u", major, minor, micro, nano);
memcpy (&identification->product_uid, &gst_uid, 16);
memcpy (&identification->modification_date,
&mux->preface->last_modified_date, sizeof (MXFTimestamp));
memcpy (&identification->toolkit_version, &identification->product_version,
sizeof (MXFProductVersion));
#ifdef HAVE_SYS_UTSNAME_H
{
struct utsname sys_details;
if (uname (&sys_details) == 0) {
identification->platform = g_strdup_printf ("%s %s %s",
sys_details.sysname, sys_details.release, sys_details.machine);
}
}
#endif
#if defined(G_OS_WIN32)
if (identification->platform == NULL)
identification->platform = g_strdup ("Microsoft Windows");
#elif defined(G_OS_BEOS)
if (identification->platform == NULL)
identification->platform = g_strdup ("BEOS");
#elif defined(G_OS_UNIX)
if (identification->platform == NULL)
identification->platform = g_strdup ("Unix");
#endif
}
/* Content storage */
{
MXFMetadataContentStorage *cstorage;
guint i;
cstorage = mux->preface->content_storage = (MXFMetadataContentStorage *)
gst_mini_object_new (MXF_TYPE_METADATA_CONTENT_STORAGE);
mxf_uuid_init (&MXF_METADATA_BASE (cstorage)->instance_uid, mux->metadata);
g_hash_table_insert (mux->metadata,
&MXF_METADATA_BASE (cstorage)->instance_uid, cstorage);
cstorage->n_packages = 2;
cstorage->packages = g_new0 (MXFMetadataGenericPackage *, 2);
/* Source package */
{
MXFMetadataSourcePackage *p;
cstorage->packages[1] = (MXFMetadataGenericPackage *)
gst_mini_object_new (MXF_TYPE_METADATA_SOURCE_PACKAGE);
mxf_uuid_init (&MXF_METADATA_BASE (cstorage->packages[1])->instance_uid,
mux->metadata);
g_hash_table_insert (mux->metadata,
&MXF_METADATA_BASE (cstorage->packages[1])->instance_uid,
cstorage->packages[1]);
p = (MXFMetadataSourcePackage *) cstorage->packages[1];
mxf_umid_init (&p->parent.package_uid);
p->parent.name = g_strdup ("Source package");
memcpy (&p->parent.package_creation_date,
&mux->preface->last_modified_date, sizeof (MXFTimestamp));
memcpy (&p->parent.package_modified_date,
&mux->preface->last_modified_date, sizeof (MXFTimestamp));
p->parent.n_tracks = g_slist_length (mux->collect->data);
p->parent.tracks = g_new0 (MXFMetadataTrack *, p->parent.n_tracks);
if (p->parent.n_tracks > 1) {
MXFMetadataMultipleDescriptor *d;
p->descriptor = (MXFMetadataGenericDescriptor *)
gst_mini_object_new (MXF_TYPE_METADATA_MULTIPLE_DESCRIPTOR);
d = (MXFMetadataMultipleDescriptor *) p->descriptor;
d->n_sub_descriptors = p->parent.n_tracks;
d->sub_descriptors =
g_new0 (MXFMetadataGenericDescriptor *, p->parent.n_tracks);
mxf_uuid_init (&MXF_METADATA_BASE (d)->instance_uid, mux->metadata);
g_hash_table_insert (mux->metadata,
&MXF_METADATA_BASE (d)->instance_uid, d);
}
/* Tracks */
{
guint n = 0;
/* Essence tracks */
for (l = mux->collect->data; l; l = l->next) {
GstMXFMuxPad *cpad = l->data;
MXFMetadataTimelineTrack *track;
MXFMetadataSequence *sequence;
MXFMetadataSourceClip *clip;
p->parent.tracks[n] = (MXFMetadataTrack *)
gst_mini_object_new (MXF_TYPE_METADATA_TIMELINE_TRACK);
track = (MXFMetadataTimelineTrack *) p->parent.tracks[n];
mxf_uuid_init (&MXF_METADATA_BASE (track)->instance_uid,
mux->metadata);
g_hash_table_insert (mux->metadata,
&MXF_METADATA_BASE (track)->instance_uid, track);
track->parent.track_id = n + 1;
track->parent.track_number =
cpad->writer->get_track_number_template (cpad->descriptor,
GST_PAD_CAPS (cpad->collect.pad), cpad->mapping_data);
cpad->writer->get_edit_rate (cpad->descriptor,
GST_PAD_CAPS (cpad->collect.pad), cpad->mapping_data,
cpad->collect.buffer, p, track, &track->edit_rate);
sequence = track->parent.sequence = (MXFMetadataSequence *)
gst_mini_object_new (MXF_TYPE_METADATA_SEQUENCE);
mxf_uuid_init (&MXF_METADATA_BASE (sequence)->instance_uid,
mux->metadata);
g_hash_table_insert (mux->metadata,
&MXF_METADATA_BASE (sequence)->instance_uid, sequence);
memcpy (&sequence->data_definition, &cpad->writer->data_definition,
16);
sequence->n_structural_components = 1;
sequence->structural_components =
g_new0 (MXFMetadataStructuralComponent *, 1);
clip = (MXFMetadataSourceClip *)
gst_mini_object_new (MXF_TYPE_METADATA_SOURCE_CLIP);
sequence->structural_components[0] =
(MXFMetadataStructuralComponent *) clip;
mxf_uuid_init (&MXF_METADATA_BASE (clip)->instance_uid,
mux->metadata);
g_hash_table_insert (mux->metadata,
&MXF_METADATA_BASE (clip)->instance_uid, clip);
memcpy (&clip->parent.data_definition, &sequence->data_definition,
16);
clip->start_position = 0;
cpad->source_package = p;
cpad->source_track = track;
cpad->descriptor->linked_track_id = n + 1;
if (p->parent.n_tracks == 1) {
p->descriptor = (MXFMetadataGenericDescriptor *) cpad->descriptor;
} else {
MXF_METADATA_MULTIPLE_DESCRIPTOR (p->descriptor)->
sub_descriptors[n] =
(MXFMetadataGenericDescriptor *) cpad->descriptor;
}
n++;
}
}
}
/* Material package */
{
MXFMetadataMaterialPackage *p;
MXFFraction min_edit_rate = { 0, 0 };
gdouble min_edit_rate_d = G_MAXDOUBLE;
cstorage->packages[0] = (MXFMetadataGenericPackage *)
gst_mini_object_new (MXF_TYPE_METADATA_MATERIAL_PACKAGE);
memcpy (&MXF_METADATA_BASE (cstorage->packages[0])->instance_uid,
&mux->preface->primary_package_uid, 16);
g_hash_table_insert (mux->metadata,
&MXF_METADATA_BASE (cstorage->packages[0])->instance_uid,
cstorage->packages[0]);
p = (MXFMetadataMaterialPackage *) cstorage->packages[0];
mxf_umid_init (&p->package_uid);
p->name = g_strdup ("Material package");
memcpy (&p->package_creation_date, &mux->preface->last_modified_date,
sizeof (MXFTimestamp));
memcpy (&p->package_modified_date, &mux->preface->last_modified_date,
sizeof (MXFTimestamp));
p->n_tracks = g_slist_length (mux->collect->data) + 1;
p->tracks = g_new0 (MXFMetadataTrack *, p->n_tracks);
/* Tracks */
{
guint n;
n = 1;
/* Essence tracks */
for (l = mux->collect->data; l; l = l->next) {
GstMXFMuxPad *cpad = l->data;
MXFMetadataSourcePackage *source_package;
MXFMetadataTimelineTrack *track, *source_track;
MXFMetadataSequence *sequence;
MXFMetadataSourceClip *clip;
source_package = MXF_METADATA_SOURCE_PACKAGE (cstorage->packages[1]);
source_track =
MXF_METADATA_TIMELINE_TRACK (source_package->parent.tracks[n -
1]);
p->tracks[n] = (MXFMetadataTrack *)
gst_mini_object_new (MXF_TYPE_METADATA_TIMELINE_TRACK);
track = (MXFMetadataTimelineTrack *) p->tracks[n];
mxf_uuid_init (&MXF_METADATA_BASE (track)->instance_uid,
mux->metadata);
g_hash_table_insert (mux->metadata,
&MXF_METADATA_BASE (track)->instance_uid, track);
track->parent.track_id = n + 1;
track->parent.track_number = 0;
cpad->writer->get_edit_rate (cpad->descriptor,
GST_PAD_CAPS (cpad->collect.pad), cpad->mapping_data,
cpad->collect.buffer, source_package, source_track,
&track->edit_rate);
if (track->edit_rate.n != source_track->edit_rate.n ||
track->edit_rate.d != source_track->edit_rate.d) {
memcpy (&source_track->edit_rate, &track->edit_rate,
sizeof (MXFFraction));
}
if (track->edit_rate.d <= 0 || track->edit_rate.n <= 0) {
GST_ERROR_OBJECT (mux, "Invalid edit rate");
return GST_FLOW_ERROR;
}
if (min_edit_rate_d >
((gdouble) track->edit_rate.n) / ((gdouble) track->edit_rate.d)) {
min_edit_rate_d =
((gdouble) track->edit_rate.n) / ((gdouble) track->edit_rate.d);
memcpy (&min_edit_rate, &track->edit_rate, sizeof (MXFFraction));
}
sequence = track->parent.sequence = (MXFMetadataSequence *)
gst_mini_object_new (MXF_TYPE_METADATA_SEQUENCE);
mxf_uuid_init (&MXF_METADATA_BASE (sequence)->instance_uid,
mux->metadata);
g_hash_table_insert (mux->metadata,
&MXF_METADATA_BASE (sequence)->instance_uid, sequence);
memcpy (&sequence->data_definition, &cpad->writer->data_definition,
16);
sequence->n_structural_components = 1;
sequence->structural_components =
g_new0 (MXFMetadataStructuralComponent *, 1);
clip = (MXFMetadataSourceClip *)
gst_mini_object_new (MXF_TYPE_METADATA_SOURCE_CLIP);
sequence->structural_components[0] =
(MXFMetadataStructuralComponent *) clip;
mxf_uuid_init (&MXF_METADATA_BASE (clip)->instance_uid,
mux->metadata);
g_hash_table_insert (mux->metadata,
&MXF_METADATA_BASE (clip)->instance_uid, clip);
memcpy (&clip->parent.data_definition, &sequence->data_definition,
16);
clip->start_position = 0;
memcpy (&clip->source_package_id, &cstorage->packages[1]->package_uid,
32);
clip->source_track_id = n;
n++;
}
n = 0;
/* Timecode track */
{
MXFMetadataTimelineTrack *track;
MXFMetadataSequence *sequence;
MXFMetadataTimecodeComponent *component;
p->tracks[n] = (MXFMetadataTrack *)
gst_mini_object_new (MXF_TYPE_METADATA_TIMELINE_TRACK);
track = (MXFMetadataTimelineTrack *) p->tracks[n];
mxf_uuid_init (&MXF_METADATA_BASE (track)->instance_uid,
mux->metadata);
g_hash_table_insert (mux->metadata,
&MXF_METADATA_BASE (track)->instance_uid, track);
track->parent.track_id = n + 1;
track->parent.track_number = 0;
track->parent.track_name = g_strdup ("Timecode track");
/* FIXME: Is this correct? */
memcpy (&track->edit_rate, &min_edit_rate, sizeof (MXFFraction));
sequence = track->parent.sequence = (MXFMetadataSequence *)
gst_mini_object_new (MXF_TYPE_METADATA_SEQUENCE);
mxf_uuid_init (&MXF_METADATA_BASE (sequence)->instance_uid,
mux->metadata);
g_hash_table_insert (mux->metadata,
&MXF_METADATA_BASE (sequence)->instance_uid, sequence);
memcpy (&sequence->data_definition,
mxf_metadata_track_identifier_get
(MXF_METADATA_TRACK_TIMECODE_12M_INACTIVE), 16);
sequence->n_structural_components = 1;
sequence->structural_components =
g_new0 (MXFMetadataStructuralComponent *, 1);
component = (MXFMetadataTimecodeComponent *)
gst_mini_object_new (MXF_TYPE_METADATA_TIMECODE_COMPONENT);
sequence->structural_components[0] =
(MXFMetadataStructuralComponent *) component;
mxf_uuid_init (&MXF_METADATA_BASE (component)->instance_uid,
mux->metadata);
g_hash_table_insert (mux->metadata,
&MXF_METADATA_BASE (component)->instance_uid, component);
memcpy (&component->parent.data_definition,
&sequence->data_definition, 16);
component->start_timecode = 0;
component->rounded_timecode_base =
(((gdouble) track->edit_rate.n) / ((gdouble) track->edit_rate.d) +
0.5);
/* TODO: drop frame */
}
memcpy (&mux->min_edit_rate, &min_edit_rate, sizeof (MXFFraction));
}
}
for (i = 0; i < cstorage->packages[1]->n_tracks; i++) {
MXFMetadataTrack *track = cstorage->packages[1]->tracks[i];
guint j;
guint32 templ;
guint8 n_type, n;
if ((track->track_number & 0x00ff00ff) != 0)
continue;
templ = track->track_number;
n_type = 0;
for (j = 0; j < cstorage->packages[1]->n_tracks; j++) {
MXFMetadataTrack *tmp = cstorage->packages[1]->tracks[j];
if (tmp->track_number == templ) {
n_type++;
}
}
n = 0;
for (j = 0; j < cstorage->packages[1]->n_tracks; j++) {
MXFMetadataTrack *tmp = cstorage->packages[1]->tracks[j];
if (tmp->track_number == templ) {
n++;
tmp->track_number |= (n_type << 16) | (n);
}
}
}
cstorage->n_essence_container_data = 1;
cstorage->essence_container_data =
g_new0 (MXFMetadataEssenceContainerData *, 1);
cstorage->essence_container_data[0] = (MXFMetadataEssenceContainerData *)
gst_mini_object_new (MXF_TYPE_METADATA_ESSENCE_CONTAINER_DATA);
mxf_uuid_init (&MXF_METADATA_BASE (cstorage->essence_container_data[0])->
instance_uid, mux->metadata);
g_hash_table_insert (mux->metadata,
&MXF_METADATA_BASE (cstorage->essence_container_data[0])->instance_uid,
cstorage->essence_container_data[0]);
cstorage->essence_container_data[0]->linked_package =
MXF_METADATA_SOURCE_PACKAGE (cstorage->packages[1]);
cstorage->essence_container_data[0]->index_sid = 0;
cstorage->essence_container_data[0]->body_sid = 1;
}
return ret;
}
static GstFlowReturn
gst_mxf_mux_init_partition_pack (GstMXFMux * mux)
{
GSList *l;
guint i = 0;
mxf_partition_pack_reset (&mux->partition);
mux->partition.type = MXF_PARTITION_PACK_HEADER;
mux->partition.closed = mux->partition.complete = FALSE;
mux->partition.major_version = 0x0001;
mux->partition.minor_version = 0x0002;
mux->partition.kag_size = 0;
mux->partition.this_partition = 0;
mux->partition.prev_partition = 0;
mux->partition.footer_partition = 0;
mux->partition.header_byte_count = 0;
mux->partition.index_byte_count = 0;
mux->partition.index_sid = 0;
mux->partition.body_offset = 0;
mux->partition.body_sid = 0;
memcpy (&mux->partition.operational_pattern,
&mux->preface->operational_pattern, 16);
mux->partition.n_essence_containers = g_slist_length (mux->collect->data);
mux->partition.essence_containers =
g_new0 (MXFUL, mux->partition.n_essence_containers);
for (l = mux->collect->data; l; l = l->next) {
GstMXFMuxPad *cpad = l->data;
guint j;
gboolean found = FALSE;
for (j = 0; j <= i; j++) {
if (mxf_ul_is_equal (&cpad->descriptor->essence_container,
&mux->partition.essence_containers[j])) {
found = TRUE;
break;
}
}
if (found)
continue;
memcpy (&mux->partition.essence_containers[i],
&cpad->descriptor->essence_container, 16);
i++;
}
mux->partition.n_essence_containers = i;
return GST_FLOW_OK;
}
static GstFlowReturn
gst_mxf_mux_write_header_metadata (GstMXFMux * mux)
{
GstFlowReturn ret = GST_FLOW_OK;
GstBuffer *buf;
GList *buffers = NULL;
#if GLIB_CHECK_VERSION (2, 16, 0)
GHashTableIter iter;
#else
GList *values;
#endif
MXFMetadataBase *m;
GList *l;
guint64 header_byte_count = 0;
buf =
mxf_metadata_base_to_buffer (MXF_METADATA_BASE (mux->preface),
&mux->primer);
header_byte_count += GST_BUFFER_SIZE (buf);
buffers = g_list_prepend (buffers, buf);
#if GLIB_CHECK_VERSION (2, 16, 0)
g_hash_table_iter_init (&iter, mux->metadata);
while (g_hash_table_iter_next (&iter, NULL, (gpointer) & m)) {
#else
values = g_hash_table_get_values (mux->metadata);
for (l = values; l; l = l->next) {
m = l->data;
#endif
buf = mxf_metadata_base_to_buffer (m, &mux->primer);
header_byte_count += GST_BUFFER_SIZE (buf);
buffers = g_list_prepend (buffers, buf);
}
#if !GLIB_CHECK_VERSION (2, 16, 0)
g_list_free (values);
#endif
buffers = g_list_reverse (buffers);
buf = mxf_primer_pack_to_buffer (&mux->primer);
header_byte_count += GST_BUFFER_SIZE (buf);
buffers = g_list_prepend (buffers, buf);
mux->partition.header_byte_count = header_byte_count;
buf = mxf_partition_pack_to_buffer (&mux->partition);
if ((ret = gst_mxf_mux_push (mux, buf)) != GST_FLOW_OK) {
GST_ERROR_OBJECT (mux, "Failed pushing partition: %s",
gst_flow_get_name (ret));
g_list_foreach (buffers, (GFunc) gst_mini_object_unref, NULL);
g_list_free (buffers);
return ret;
}
for (l = buffers; l; l = l->next) {
buf = l->data;
l->data = NULL;
if ((ret = gst_mxf_mux_push (mux, buf)) != GST_FLOW_OK) {
GST_ERROR_OBJECT (mux, "Failed pushing buffer: %s",
gst_flow_get_name (ret));
g_list_foreach (buffers, (GFunc) gst_mini_object_unref, NULL);
g_list_free (buffers);
return ret;
}
}
g_list_free (buffers);
return ret;
}
static const guint8 _gc_essence_element_ul[] = {
0x06, 0x0e, 0x2b, 0x34, 0x01, 0x02, 0x01, 0x00,
0x0d, 0x01, 0x03, 0x01, 0x00, 0x00, 0x00, 0x00
};
static GstFlowReturn
gst_mxf_mux_handle_buffer (GstMXFMux * mux, GstMXFMuxPad * cpad)
{
GstBuffer *buf = NULL;
GstBuffer *outbuf = NULL;
GstBuffer *packet;
GstFlowReturn ret = GST_FLOW_OK;
guint8 slen, ber[9];
gboolean flush =
(cpad->collect.abidata.ABI.eos && !cpad->have_complete_edit_unit
&& cpad->collect.buffer == NULL);
if (cpad->have_complete_edit_unit) {
GST_DEBUG_OBJECT (cpad->collect.pad,
"Handling remaining buffer for track %u at position %" G_GINT64_FORMAT,
cpad->source_track->parent.track_id, cpad->pos);
buf = NULL;
} else if (!flush) {
buf = gst_collect_pads_pop (mux->collect, &cpad->collect);
}
if (buf) {
GST_DEBUG_OBJECT (cpad->collect.pad,
"Handling buffer of size %u for track %u at position %" G_GINT64_FORMAT,
GST_BUFFER_SIZE (buf), cpad->source_track->parent.track_id, cpad->pos);
} else {
flush = TRUE;
GST_DEBUG_OBJECT (cpad->collect.pad,
"Flushing for track %u at position %" G_GINT64_FORMAT,
cpad->source_track->parent.track_id, cpad->pos);
}
ret = cpad->write_func (buf, GST_PAD_CAPS (cpad->collect.pad),
cpad->mapping_data, cpad->adapter, &outbuf, flush);
if (ret != GST_FLOW_OK && ret != GST_FLOW_CUSTOM_SUCCESS) {
GST_ERROR_OBJECT (cpad->collect.pad,
"Failed handling buffer for track %u, reason %s",
cpad->source_track->parent.track_id, gst_flow_get_name (ret));
return ret;
}
if (ret == GST_FLOW_CUSTOM_SUCCESS) {
cpad->have_complete_edit_unit = TRUE;
ret = GST_FLOW_OK;
} else {
cpad->have_complete_edit_unit = FALSE;
}
buf = outbuf;
if (buf == NULL)
return ret;
slen = mxf_ber_encode_size (GST_BUFFER_SIZE (buf), ber);
packet = gst_buffer_new_and_alloc (16 + slen + GST_BUFFER_SIZE (buf));
memcpy (GST_BUFFER_DATA (packet), _gc_essence_element_ul, 16);
GST_BUFFER_DATA (packet)[7] = cpad->descriptor->essence_container.u[7];
GST_WRITE_UINT32_BE (&GST_BUFFER_DATA (packet)[12],
cpad->source_track->parent.track_number);
memcpy (&GST_BUFFER_DATA (packet)[16], ber, slen);
memcpy (&GST_BUFFER_DATA (packet)[16 + slen], GST_BUFFER_DATA (buf),
GST_BUFFER_SIZE (buf));
gst_buffer_unref (buf);
GST_DEBUG_OBJECT (cpad->collect.pad, "Pushing buffer of size %u for track %u",
GST_BUFFER_SIZE (packet), cpad->source_track->parent.track_id);
if ((ret = gst_mxf_mux_push (mux, packet)) != GST_FLOW_OK) {
GST_ERROR_OBJECT (cpad->collect.pad,
"Failed pushing buffer for track %u, reason %s",
cpad->source_track->parent.track_id, gst_flow_get_name (ret));
return ret;
}
cpad->pos++;
cpad->last_timestamp =
gst_util_uint64_scale (GST_SECOND * cpad->pos,
cpad->source_track->edit_rate.d, cpad->source_track->edit_rate.n);
return ret;
}
static GstFlowReturn
gst_mxf_mux_write_body_partition (GstMXFMux * mux)
{
GstBuffer *buf;
mux->partition.type = MXF_PARTITION_PACK_BODY;
mux->partition.this_partition = mux->offset;
mux->partition.prev_partition = 0;
mux->partition.footer_partition = 0;
mux->partition.header_byte_count = 0;
mux->partition.index_byte_count = 0;
mux->partition.index_sid = 0;
mux->partition.body_offset = 0;
mux->partition.body_sid =
mux->preface->content_storage->essence_container_data[0]->body_sid;
buf = mxf_partition_pack_to_buffer (&mux->partition);
return gst_mxf_mux_push (mux, buf);
}
static GstFlowReturn
gst_mxf_mux_handle_eos (GstMXFMux * mux)
{
GSList *l;
gboolean have_data = FALSE;
GstBuffer *packet;
do {
GstMXFMuxPad *best = NULL;
have_data = FALSE;
for (l = mux->collect->data; l; l = l->next) {
GstMXFMuxPad *cpad = l->data;
GstClockTime next_gc_timestamp =
gst_util_uint64_scale ((mux->last_gc_position + 1) * GST_SECOND,
mux->min_edit_rate.d, mux->min_edit_rate.n);
best = NULL;
if (cpad->have_complete_edit_unit ||
gst_adapter_available (cpad->adapter) > 0 || cpad->collect.buffer) {
have_data = TRUE;
if (cpad->last_timestamp < next_gc_timestamp) {
best = cpad;
break;
}
} else if (have_data && !l->next) {
mux->last_gc_position++;
mux->last_gc_timestamp = next_gc_timestamp;
have_data = FALSE;
best = NULL;
break;
}
}
if (best) {
gst_mxf_mux_handle_buffer (mux, best);
have_data = TRUE;
}
} while (have_data);
mux->last_gc_position++;
mux->last_gc_timestamp =
gst_util_uint64_scale (mux->last_gc_position * GST_SECOND,
mux->min_edit_rate.d, mux->min_edit_rate.n);
/* Update essence track durations */
for (l = mux->collect->data; l; l = l->next) {
GstMXFMuxPad *cpad = l->data;
guint i;
/* Update durations */
cpad->source_track->parent.sequence->duration = cpad->pos;
MXF_METADATA_SOURCE_CLIP (cpad->source_track->parent.sequence->
structural_components[0])->parent.duration = cpad->pos;
for (i = 0; i < mux->preface->content_storage->packages[0]->n_tracks; i++) {
MXFMetadataTimelineTrack *track;
if (!MXF_IS_METADATA_TIMELINE_TRACK (mux->preface->content_storage->
packages[0]->tracks[i])
|| !MXF_IS_METADATA_SOURCE_CLIP (mux->preface->content_storage->
packages[0]->tracks[i]->sequence->structural_components[0]))
continue;
track =
MXF_METADATA_TIMELINE_TRACK (mux->preface->content_storage->
packages[0]->tracks[i]);
if (MXF_METADATA_SOURCE_CLIP (track->parent.sequence->
structural_components[0])->source_track_id ==
cpad->source_track->parent.track_id) {
track->parent.sequence->structural_components[0]->duration = cpad->pos;
track->parent.sequence->duration = cpad->pos;
}
}
}
/* Update timecode track duration */
{
MXFMetadataTimelineTrack *track =
MXF_METADATA_TIMELINE_TRACK (mux->preface->content_storage->
packages[0]->tracks[0]);
MXFMetadataSequence *sequence = track->parent.sequence;
MXFMetadataTimecodeComponent *component =
MXF_METADATA_TIMECODE_COMPONENT (sequence->structural_components[0]);
sequence->duration = mux->last_gc_position;
component->parent.duration = mux->last_gc_position;
}
{
guint64 body_partition = mux->partition.this_partition;
guint32 body_sid = mux->partition.body_sid;
guint64 footer_partition = mux->offset;
GArray *rip;
GstFlowReturn ret;
MXFRandomIndexPackEntry entry;
mux->partition.type = MXF_PARTITION_PACK_FOOTER;
mux->partition.closed = TRUE;
mux->partition.complete = TRUE;
mux->partition.this_partition = mux->offset;
mux->partition.prev_partition = body_partition;
mux->partition.footer_partition = mux->offset;
mux->partition.header_byte_count = 0;
mux->partition.index_byte_count = 0;
mux->partition.index_sid = 0;
mux->partition.body_offset = 0;
mux->partition.body_sid = 0;
gst_mxf_mux_write_header_metadata (mux);
rip = g_array_sized_new (FALSE, FALSE, sizeof (MXFRandomIndexPackEntry), 3);
entry.offset = 0;
entry.body_sid = 0;
g_array_append_val (rip, entry);
entry.offset = body_partition;
entry.body_sid = body_sid;
g_array_append_val (rip, entry);
entry.offset = footer_partition;
entry.body_sid = 0;
g_array_append_val (rip, entry);
packet = mxf_random_index_pack_to_buffer (rip);
if ((ret = gst_mxf_mux_push (mux, packet)) != GST_FLOW_OK) {
GST_ERROR_OBJECT (mux, "Failed pushing random index pack");
}
g_array_free (rip, TRUE);
/* Rewrite header partition with updated values */
if (gst_pad_push_event (mux->srcpad,
gst_event_new_new_segment (FALSE, 1.0, GST_FORMAT_BYTES, 0, -1,
0))) {
mux->offset = 0;
mux->partition.type = MXF_PARTITION_PACK_HEADER;
mux->partition.closed = TRUE;
mux->partition.complete = TRUE;
mux->partition.this_partition = 0;
mux->partition.prev_partition = footer_partition;
mux->partition.footer_partition = footer_partition;
mux->partition.header_byte_count = 0;
mux->partition.index_byte_count = 0;
mux->partition.index_sid = 0;
mux->partition.body_offset = 0;
mux->partition.body_sid = 0;
ret = gst_mxf_mux_write_header_metadata (mux);
if (ret != GST_FLOW_OK) {
GST_ERROR_OBJECT (mux, "Rewriting header partition failed");
return ret;
}
} else {
GST_WARNING_OBJECT (mux, "Can't rewrite header partition");
}
}
return GST_FLOW_OK;
}
static gint
_sort_mux_pads (gconstpointer a, gconstpointer b)
{
const GstMXFMuxPad *pa = a, *pb = b;
MXFMetadataTrackType ta =
mxf_metadata_track_identifier_parse (&pa->writer->data_definition);
MXFMetadataTrackType tb =
mxf_metadata_track_identifier_parse (&pb->writer->data_definition);
if (ta != tb)
return ta - tb;
return pa->source_track->parent.track_number -
pa->source_track->parent.track_number;
}
static GstFlowReturn
gst_mxf_mux_collected (GstCollectPads * pads, gpointer user_data)
{
GstMXFMux *mux = GST_MXF_MUX (user_data);
GstMXFMuxPad *best = NULL;
GstFlowReturn ret;
GSList *sl;
gboolean eos = TRUE;
if (mux->state == GST_MXF_MUX_STATE_ERROR) {
GST_ERROR_OBJECT (mux, "Had an error before -- returning");
return GST_FLOW_ERROR;
} else if (mux->state == GST_MXF_MUX_STATE_EOS) {
GST_WARNING_OBJECT (mux, "EOS");
return GST_FLOW_UNEXPECTED;
}
if (mux->state == GST_MXF_MUX_STATE_HEADER) {
if (mux->collect->data == NULL) {
GST_ELEMENT_ERROR (mux, STREAM, MUX, (NULL),
("No input streams configured"));
ret = GST_FLOW_ERROR;
goto error;
}
if (gst_pad_push_event (mux->srcpad,
gst_event_new_new_segment (FALSE, 1.0, GST_FORMAT_BYTES, 0, -1,
0))) {
if ((ret = gst_mxf_mux_create_metadata (mux)) != GST_FLOW_OK)
goto error;
if ((ret = gst_mxf_mux_init_partition_pack (mux)) != GST_FLOW_OK)
goto error;
ret = gst_mxf_mux_write_header_metadata (mux);
} else {
ret = GST_FLOW_ERROR;
}
if (ret != GST_FLOW_OK)
goto error;
/* Sort pads, we will always write in that order */
mux->collect->data = g_slist_sort (mux->collect->data, _sort_mux_pads);
/* Write body partition */
ret = gst_mxf_mux_write_body_partition (mux);
if (ret != GST_FLOW_OK)
goto error;
mux->state = GST_MXF_MUX_STATE_DATA;
}
g_return_val_if_fail (g_hash_table_size (mux->metadata) > 0, GST_FLOW_ERROR);
do {
for (sl = mux->collect->data; sl; sl = sl->next) {
GstMXFMuxPad *cpad = sl->data;
GstClockTime next_gc_timestamp =
gst_util_uint64_scale ((mux->last_gc_position + 1) * GST_SECOND,
mux->min_edit_rate.d, mux->min_edit_rate.n);
eos &= cpad->collect.abidata.ABI.eos;
if ((!cpad->collect.abidata.ABI.eos || cpad->have_complete_edit_unit ||
gst_adapter_available (cpad->adapter) > 0 || cpad->collect.buffer)
&& cpad->last_timestamp < next_gc_timestamp) {
best = cpad;
break;
} else if (!eos && !sl->next) {
mux->last_gc_position++;
mux->last_gc_timestamp = next_gc_timestamp;
eos = FALSE;
best = NULL;
break;
}
}
} while (!eos && best == NULL);
if (!eos && best) {
ret = gst_mxf_mux_handle_buffer (mux, best);
if (ret != GST_FLOW_OK)
goto error;
} else if (eos) {
GST_DEBUG_OBJECT (mux, "Handling EOS");
gst_mxf_mux_handle_eos (mux);
gst_pad_push_event (mux->srcpad, gst_event_new_eos ());
mux->state = GST_MXF_MUX_STATE_EOS;
return GST_FLOW_UNEXPECTED;
}
return GST_FLOW_OK;
error:
{
mux->state = GST_MXF_MUX_STATE_ERROR;
gst_pad_push_event (mux->srcpad, gst_event_new_eos ());
return ret;
}
}
static GstStateChangeReturn
gst_mxf_mux_change_state (GstElement * element, GstStateChange transition)
{
GstStateChangeReturn ret;
GstMXFMux *mux = GST_MXF_MUX (element);
switch (transition) {
case GST_STATE_CHANGE_NULL_TO_READY:
break;
case GST_STATE_CHANGE_READY_TO_PAUSED:
gst_collect_pads_start (mux->collect);
break;
case GST_STATE_CHANGE_PAUSED_TO_PLAYING:
break;
case GST_STATE_CHANGE_PAUSED_TO_READY:
gst_collect_pads_stop (mux->collect);
break;
default:
break;
}
ret = GST_ELEMENT_CLASS (parent_class)->change_state (element, transition);
switch (transition) {
case GST_STATE_CHANGE_PLAYING_TO_PAUSED:
break;
case GST_STATE_CHANGE_PAUSED_TO_READY:
gst_mxf_mux_reset (mux);
break;
case GST_STATE_CHANGE_READY_TO_NULL:
break;
default:
break;
}
return ret;
}
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