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gstreamer/subprojects/gst-editing-services/ges/ges-track.c

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/* GStreamer Editing Services
* Copyright (C) 2009 Edward Hervey <edward.hervey@collabora.co.uk>
* 2009 Nokia Corporation
*
* This library is free software; you can redistribute it and/or
* modify it under the terms of the GNU Library General Public
* License as published by the Free Software Foundation; either
* version 2 of the License, or (at your option) any later version.
*
* This library is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
* Library General Public License for more details.
*
* You should have received a copy of the GNU Library General Public
* License along with this library; if not, write to the
* Free Software Foundation, Inc., 51 Franklin St, Fifth Floor,
* Boston, MA 02110-1301, USA.
*/
/**
* SECTION:gestrack
* @title: GESTrack
* @short_description: The output source of a #GESTimeline
*
* A #GESTrack acts an output source for a #GESTimeline. Each one
* essentially provides an additional #GstPad for the timeline, with
* #GESTrack:restriction-caps capabilities. Internally, a track
* wraps an #nlecomposition filtered by a #capsfilter.
*
* A track will contain a number of #GESTrackElement-s, and its role is
* to select and activate these elements according to their timings when
* the timeline in played. For example, a track would activate a
* #GESSource when its #GESTimelineElement:start is reached by outputting
* its data for its #GESTimelineElement:duration. Similarly, a
* #GESOperation would be activated by applying its effect to the source
* data, starting from its #GESTimelineElement:start time and lasting for
* its #GESTimelineElement:duration.
*
* For most users, it will usually be sufficient to add newly created
* tracks to a timeline, but never directly add an element to a track.
* Whenever a #GESClip is added to a timeline, the clip adds its
* elements to the timeline's tracks and assumes responsibility for
* updating them.
*/
#ifdef HAVE_CONFIG_H
#include "config.h"
#endif
#include "ges-internal.h"
#include "ges-track.h"
#include "ges-track-element.h"
#include "ges-meta-container.h"
#include "ges-video-track.h"
#include "ges-audio-track.h"
#define CHECK_THREAD(track) g_assert(track->priv->valid_thread == g_thread_self())
static GstStaticPadTemplate ges_track_src_pad_template =
GST_STATIC_PAD_TEMPLATE ("src",
GST_PAD_SRC,
GST_PAD_ALWAYS,
GST_STATIC_CAPS_ANY);
/* Structure that represents gaps and keep knowledge
* of the gaps filled in the track */
typedef struct
{
GstElement *nleobj;
GstClockTime start;
GstClockTime duration;
GESTrack *track;
} Gap;
struct _GESTrackPrivate
{
/*< private > */
GESTimeline *timeline;
GSequence *trackelements_by_start;
GHashTable *trackelements_iter;
GList *gaps;
gboolean last_gap_disabled;
guint64 duration;
GstCaps *caps;
GstCaps *restriction_caps;
GstElement *composition; /* The composition associated with this track */
GstPad *srcpad; /* The source GhostPad */
gboolean updating;
gboolean mixing;
GstElement *mixing_operation;
GstElement *capsfilter;
/* Virtual method to create GstElement that fill gaps */
GESCreateElementForGapFunc create_element_for_gaps;
GThread *valid_thread;
};
enum
{
ARG_0,
ARG_CAPS,
ARG_RESTRICTION_CAPS,
ARG_TYPE,
ARG_DURATION,
ARG_MIXING,
ARG_ID,
ARG_LAST,
TRACK_ELEMENT_ADDED,
TRACK_ELEMENT_REMOVED,
COMMITED,
LAST_SIGNAL
};
static guint ges_track_signals[LAST_SIGNAL] = { 0 };
static GParamSpec *properties[ARG_LAST];
G_DEFINE_TYPE_WITH_CODE (GESTrack, ges_track, GST_TYPE_BIN,
G_ADD_PRIVATE (GESTrack)
G_IMPLEMENT_INTERFACE (GES_TYPE_META_CONTAINER, NULL));
static void composition_duration_cb (GstElement * composition, GParamSpec * arg
G_GNUC_UNUSED, GESTrack * obj);
static void ges_track_set_caps (GESTrack * track, const GstCaps * caps);
/* Private methods/functions/callbacks */
static void
add_trackelement_to_list_foreach (GESTrackElement * trackelement, GList ** list)
{
gst_object_ref (trackelement);
*list = g_list_prepend (*list, trackelement);
}
static Gap *
gap_new (GESTrack * track, GstClockTime start, GstClockTime duration)
{
GstElement *nlesrc, *elem;
Gap *new_gap;
nlesrc = gst_element_factory_make ("nlesource", NULL);
elem = track->priv->create_element_for_gaps (track);
if (G_UNLIKELY (gst_bin_add (GST_BIN (nlesrc), elem) == FALSE)) {
GST_WARNING_OBJECT (track, "Could not create gap filler");
if (nlesrc)
gst_object_unref (nlesrc);
if (elem)
gst_object_unref (elem);
return NULL;
}
if (G_UNLIKELY (ges_nle_composition_add_object (track->priv->composition,
nlesrc) == FALSE)) {
GST_WARNING_OBJECT (track, "Could not add gap to the composition");
if (nlesrc)
gst_object_unref (nlesrc);
if (elem)
gst_object_unref (elem);
return NULL;
}
new_gap = g_slice_new (Gap);
new_gap->start = start;
new_gap->duration = duration;
new_gap->track = track;
new_gap->nleobj = nlesrc;
g_object_set (nlesrc, "start", new_gap->start, "duration", new_gap->duration,
"priority", 1, NULL);
GST_DEBUG_OBJECT (track,
"Created gap with start %" GST_TIME_FORMAT " duration %" GST_TIME_FORMAT,
GST_TIME_ARGS (new_gap->start), GST_TIME_ARGS (new_gap->duration));
return new_gap;
}
static void
free_gap (Gap * gap)
{
GESTrack *track = gap->track;
GST_DEBUG_OBJECT (track, "Removed gap with start %" GST_TIME_FORMAT
" duration %" GST_TIME_FORMAT, GST_TIME_ARGS (gap->start),
GST_TIME_ARGS (gap->duration));
ges_nle_composition_remove_object (track->priv->composition, gap->nleobj);
g_slice_free (Gap, gap);
}
static inline void
update_gaps (GESTrack * track)
{
Gap *gap;
GList *gaps;
GSequenceIter *it;
GESTrackElement *trackelement;
GstClockTime start, end, duration = 0, timeline_duration = 0;
GESTrackPrivate *priv = track->priv;
if (priv->create_element_for_gaps == NULL) {
GST_INFO ("Not filling the gaps as no create_element_for_gaps vmethod"
" provided");
return;
}
gaps = priv->gaps;
priv->gaps = NULL;
/* 1- And recalculate gaps */
for (it = g_sequence_get_begin_iter (priv->trackelements_by_start);
g_sequence_iter_is_end (it) == FALSE; it = g_sequence_iter_next (it)) {
trackelement = g_sequence_get (it);
if (!ges_track_element_is_active (trackelement))
continue;
if (priv->timeline) {
guint32 layer_prio = GES_TIMELINE_ELEMENT_LAYER_PRIORITY (trackelement);
if (layer_prio != GES_TIMELINE_ELEMENT_NO_LAYER_PRIORITY) {
GESLayer *layer = g_list_nth_data (priv->timeline->layers, layer_prio);
if (!ges_layer_get_active_for_track (layer, track))
continue;
}
}
start = _START (trackelement);
end = start + _DURATION (trackelement);
if (start > duration) {
/* 2- Fill gap */
gap = gap_new (track, duration, start - duration);
if (G_LIKELY (gap != NULL))
priv->gaps = g_list_prepend (priv->gaps, gap);
}
duration = MAX (duration, end);
}
/* 3- Add a gap at the end of the timeline if needed */
if (priv->timeline) {
g_object_get (priv->timeline, "duration", &timeline_duration, NULL);
if (duration < timeline_duration) {
gap = gap_new (track, duration, timeline_duration - duration);
if (G_LIKELY (gap != NULL)) {
priv->gaps = g_list_prepend (priv->gaps, gap);
}
/* FIXME: here the duration is set to the duration of the timeline,
* but elsewhere it is set to the duration of the composition. Are
* these always the same? */
priv->duration = timeline_duration;
}
}
if (!track->priv->last_gap_disabled) {
GST_DEBUG_OBJECT (track, "Adding a one second gap at the end");
gap = gap_new (track, timeline_duration, 1);
priv->gaps = g_list_prepend (priv->gaps, gap);
}
/* 4- Remove old gaps */
g_list_free_full (gaps, (GDestroyNotify) free_gap);
}
void
track_disable_last_gap (GESTrack * track, gboolean disabled)
{
track->priv->last_gap_disabled = disabled;
update_gaps (track);
}
void
track_resort_and_fill_gaps (GESTrack * track)
{
g_sequence_sort (track->priv->trackelements_by_start,
(GCompareDataFunc) element_start_compare, NULL);
if (track->priv->updating == TRUE) {
update_gaps (track);
}
}
static gboolean
update_field (GQuark field_id, const GValue * value, GstStructure * original)
{
gst_structure_id_set_value (original, field_id, value);
return TRUE;
}
/* callbacks */
static void
_ghost_nlecomposition_srcpad (GESTrack * track)
{
GstPad *capsfilter_sink;
GstPad *capsfilter_src;
GESTrackPrivate *priv = track->priv;
GstPad *pad = gst_element_get_static_pad (priv->composition, "src");
capsfilter_sink = gst_element_get_static_pad (priv->capsfilter, "sink");
GST_DEBUG ("track:%p, pad %s:%s", track, GST_DEBUG_PAD_NAME (pad));
gst_pad_link (pad, capsfilter_sink);
gst_object_unref (capsfilter_sink);
gst_object_unref (pad);
capsfilter_src = gst_element_get_static_pad (priv->capsfilter, "src");
/* ghost the pad */
priv->srcpad = gst_ghost_pad_new ("src", capsfilter_src);
gst_object_unref (capsfilter_src);
gst_pad_set_active (priv->srcpad, TRUE);
gst_element_add_pad (GST_ELEMENT (track), priv->srcpad);
GST_DEBUG ("done");
}
static void
composition_duration_cb (GstElement * composition,
GParamSpec * arg G_GNUC_UNUSED, GESTrack * track)
{
guint64 duration;
g_object_get (composition, "duration", &duration, NULL);
if (track->priv->duration != duration) {
GST_DEBUG_OBJECT (track,
"composition duration : %" GST_TIME_FORMAT " current : %"
GST_TIME_FORMAT, GST_TIME_ARGS (duration),
GST_TIME_ARGS (track->priv->duration));
/* FIXME: here the duration is set to the duration of the composition,
* but elsewhere it is set to the duration of the timeline. Are these
* always the same? */
track->priv->duration = duration;
g_object_notify_by_pspec (G_OBJECT (track), properties[ARG_DURATION]);
}
}
static void
composition_commited_cb (GstElement * composition, gboolean changed,
GESTrack * self)
{
g_signal_emit (self, ges_track_signals[COMMITED], 0);
}
/* Internal */
GstElement *
ges_track_get_composition (GESTrack * track)
{
return track->priv->composition;
}
void
ges_track_set_smart_rendering (GESTrack * track, gboolean rendering_smartly)
{
GESTrackPrivate *priv = track->priv;
g_object_set (priv->capsfilter, "caps",
rendering_smartly ? NULL : priv->restriction_caps, NULL);
}
/* FIXME: Find out how to avoid doing this "hack" using the GDestroyNotify
* function pointer in the trackelements_by_start GSequence
*
* Remove @object from @track, but keeps it in the sequence this is needed
* when finalizing as we can not change a GSequence at the same time we are
* accessing it
*/
static gboolean
remove_object_internal (GESTrack * track, GESTrackElement * object,
gboolean emit, GError ** error)
{
GESTrackPrivate *priv;
GstElement *nleobject;
GST_DEBUG_OBJECT (track, "object:%p", object);
priv = track->priv;
if (G_UNLIKELY (ges_track_element_get_track (object) != track)) {
GST_WARNING_OBJECT (track, "Object belongs to another track");
return FALSE;
}
if (!ges_track_element_set_track (object, NULL, error)) {
GST_INFO_OBJECT (track, "Failed to unset the track for %" GES_FORMAT,
GES_ARGS (object));
return FALSE;
}
ges_timeline_element_set_timeline (GES_TIMELINE_ELEMENT (object), NULL);
if ((nleobject = ges_track_element_get_nleobject (object))) {
GST_DEBUG ("Removing NleObject '%s' from composition '%s'",
GST_ELEMENT_NAME (nleobject), GST_ELEMENT_NAME (priv->composition));
if (!ges_nle_composition_remove_object (priv->composition, nleobject)) {
GST_WARNING_OBJECT (track, "Failed to remove nleobject from composition");
return FALSE;
}
}
if (emit)
g_signal_emit (track, ges_track_signals[TRACK_ELEMENT_REMOVED], 0,
GES_TRACK_ELEMENT (object));
gst_object_unref (object);
return TRUE;
}
static void
dispose_trackelements_foreach (GESTrackElement * trackelement, GESTrack * track)
{
remove_object_internal (track, trackelement, TRUE, NULL);
}
/* GstElement virtual methods */
static GstStateChangeReturn
ges_track_change_state (GstElement * element, GstStateChange transition)
{
GESTrack *track = GES_TRACK (element);
if (transition == GST_STATE_CHANGE_READY_TO_PAUSED &&
track->priv->valid_thread == g_thread_self ())
track_resort_and_fill_gaps (GES_TRACK (element));
return GST_ELEMENT_CLASS (ges_track_parent_class)->change_state (element,
transition);
}
static void
ges_track_handle_message (GstBin * bin, GstMessage * message)
{
GESTrack *track = GES_TRACK (bin);
if (GST_MESSAGE_TYPE (message) == GST_MESSAGE_STREAM_COLLECTION) {
gint i;
GList *selected_streams = NULL;
GstStreamCollection *collection;
gst_message_parse_stream_collection (message, &collection);
for (i = 0; i < gst_stream_collection_get_size (collection); i++) {
GstStream *stream = gst_stream_collection_get_stream (collection, i);
GstStreamType stype = gst_stream_get_stream_type (stream);
if ((track->type == GES_TRACK_TYPE_VIDEO
&& stype == GST_STREAM_TYPE_VIDEO)
|| (track->type == GES_TRACK_TYPE_AUDIO
&& stype == GST_STREAM_TYPE_AUDIO)
|| (stype == GST_STREAM_TYPE_UNKNOWN)) {
selected_streams =
g_list_append (selected_streams,
(gchar *) gst_stream_get_stream_id (stream));
}
}
if (selected_streams) {
gst_element_send_event (GST_ELEMENT (GST_MESSAGE_SRC (message)),
gst_event_new_select_streams (selected_streams));
g_list_free (selected_streams);
}
}
gst_element_post_message (GST_ELEMENT_CAST (bin), message);
}
/* GObject virtual methods */
static void
ges_track_get_property (GObject * object, guint property_id,
GValue * value, GParamSpec * pspec)
{
GESTrack *track = GES_TRACK (object);
switch (property_id) {
case ARG_CAPS:
gst_value_set_caps (value, track->priv->caps);
break;
case ARG_TYPE:
g_value_set_flags (value, track->type);
break;
case ARG_DURATION:
g_value_set_uint64 (value, track->priv->duration);
break;
case ARG_RESTRICTION_CAPS:
gst_value_set_caps (value, track->priv->restriction_caps);
break;
case ARG_MIXING:
g_value_set_boolean (value, track->priv->mixing);
break;
case ARG_ID:
g_object_get_property (G_OBJECT (track->priv->composition), "id", value);
break;
default:
G_OBJECT_WARN_INVALID_PROPERTY_ID (object, property_id, pspec);
}
}
static void
ges_track_set_property (GObject * object, guint property_id,
const GValue * value, GParamSpec * pspec)
{
GESTrack *track = GES_TRACK (object);
switch (property_id) {
case ARG_CAPS:
ges_track_set_caps (track, gst_value_get_caps (value));
break;
case ARG_TYPE:
track->type = g_value_get_flags (value);
break;
case ARG_RESTRICTION_CAPS:
ges_track_set_restriction_caps (track, gst_value_get_caps (value));
break;
case ARG_MIXING:
ges_track_set_mixing (track, g_value_get_boolean (value));
break;
case ARG_ID:
g_object_set_property (G_OBJECT (track->priv->composition), "id", value);
break;
default:
G_OBJECT_WARN_INVALID_PROPERTY_ID (object, property_id, pspec);
}
}
static void
ges_track_dispose (GObject * object)
{
GESTrack *track = (GESTrack *) object;
GESTrackPrivate *priv = track->priv;
/* Remove all TrackElements and drop our reference */
g_hash_table_unref (priv->trackelements_iter);
g_sequence_foreach (track->priv->trackelements_by_start,
(GFunc) dispose_trackelements_foreach, track);
g_sequence_free (priv->trackelements_by_start);
g_list_free_full (priv->gaps, (GDestroyNotify) free_gap);
ges_nle_object_commit (track->priv->composition, TRUE);
gst_clear_object (&track->priv->mixing_operation);
if (priv->composition) {
gst_element_remove_pad (GST_ELEMENT (track), priv->srcpad);
gst_bin_remove (GST_BIN (object), priv->composition);
priv->composition = NULL;
}
if (priv->caps) {
gst_caps_unref (priv->caps);
priv->caps = NULL;
}
if (priv->restriction_caps) {
gst_caps_unref (priv->restriction_caps);
priv->restriction_caps = NULL;
}
G_OBJECT_CLASS (ges_track_parent_class)->dispose (object);
}
static void
ges_track_finalize (GObject * object)
{
G_OBJECT_CLASS (ges_track_parent_class)->finalize (object);
}
static void
ges_track_constructed (GObject * object)
{
GESTrack *self = GES_TRACK (object);
gchar *componame = NULL;
gchar *capsfiltername = NULL;
if (self->type == GES_TRACK_TYPE_VIDEO) {
componame =
g_strdup_printf ("video_%s", GST_OBJECT_NAME (self->priv->composition));
capsfiltername =
g_strdup_printf ("video_restriction_%s",
GST_OBJECT_NAME (self->priv->capsfilter));
} else if (self->type == GES_TRACK_TYPE_AUDIO) {
componame =
g_strdup_printf ("audio_%s", GST_OBJECT_NAME (self->priv->composition));
capsfiltername =
g_strdup_printf ("audio_restriction_%s",
GST_OBJECT_NAME (self->priv->capsfilter));
}
if (componame) {
gst_object_set_name (GST_OBJECT (self->priv->composition), componame);
gst_object_set_name (GST_OBJECT (self->priv->capsfilter), capsfiltername);
g_free (componame);
g_free (capsfiltername);
}
if (!gst_bin_add (GST_BIN (self), self->priv->composition))
GST_ERROR ("Couldn't add composition to bin !");
if (!gst_bin_add (GST_BIN (self), self->priv->capsfilter))
GST_ERROR ("Couldn't add capsfilter to bin !");
_ghost_nlecomposition_srcpad (self);
if (GES_TRACK_GET_CLASS (self)->get_mixing_element) {
GstElement *nleobject;
GstElement *mixer = GES_TRACK_GET_CLASS (self)->get_mixing_element (self);
if (mixer == NULL) {
GST_WARNING_OBJECT (self, "Got no element fron get_mixing_element");
return;
}
nleobject = gst_element_factory_make ("nleoperation", "mixing-operation");
if (!gst_bin_add (GST_BIN (nleobject), mixer)) {
GST_WARNING_OBJECT (self, "Could not add the mixer to our composition");
gst_object_unref (mixer);
gst_object_unref (nleobject);
return;
}
g_object_set (nleobject, "expandable", TRUE, NULL);
if (self->priv->mixing) {
if (!ges_nle_composition_add_object (self->priv->composition, nleobject)) {
GST_WARNING_OBJECT (self, "Could not add the mixer to our composition");
gst_object_unref (nleobject);
return;
}
}
self->priv->mixing_operation = gst_object_ref (nleobject);
} else {
GST_INFO_OBJECT (self, "No way to create a main mixer");
}
}
static void
ges_track_class_init (GESTrackClass * klass)
{
GObjectClass *object_class = G_OBJECT_CLASS (klass);
GstElementClass *gstelement_class = (GstElementClass *) klass;
GstBinClass *bin_class = GST_BIN_CLASS (klass);
gstelement_class->change_state = GST_DEBUG_FUNCPTR (ges_track_change_state);
bin_class->handle_message = GST_DEBUG_FUNCPTR (ges_track_handle_message);
object_class->get_property = ges_track_get_property;
object_class->set_property = ges_track_set_property;
object_class->dispose = ges_track_dispose;
object_class->finalize = ges_track_finalize;
object_class->constructed = ges_track_constructed;
/**
* GESTrack:caps:
*
* The capabilities used to choose the output of the #GESTrack's
* elements. Internally, this is used to select output streams when
* several may be available, by determining whether its #GstPad is
* compatible (see #NleObject:caps for #nlecomposition). As such,
* this is used as a weaker indication of the desired output type of the
* track, **before** the #GESTrack:restriction-caps is applied.
* Therefore, this should be set to a *generic* superset of the
* #GESTrack:restriction-caps, such as "video/x-raw(ANY)". In addition,
* it should match with the track's #GESTrack:track-type.
*
* Note that when you set this property, the #GstCapsFeatures of all its
* #GstStructure-s will be automatically set to #GST_CAPS_FEATURES_ANY.
*
* Once a track has been added to a #GESTimeline, you should not change
* this.
*
* Default value: #GST_CAPS_ANY.
*/
properties[ARG_CAPS] = g_param_spec_boxed ("caps", "Caps",
"Caps used to choose the output stream",
GST_TYPE_CAPS, G_PARAM_READWRITE | G_PARAM_CONSTRUCT_ONLY);
g_object_class_install_property (object_class, ARG_CAPS,
properties[ARG_CAPS]);
/**
* GESTrack:restriction-caps:
*
* The capabilities that specifies the final output format of the
* #GESTrack. For example, for a video track, it would specify the
* height, width, framerate and other properties of the stream.
*
* You may change this property after the track has been added to a
* #GESTimeline, but it must remain compatible with the track's
* #GESTrack:caps.
*
* Default value: #GST_CAPS_ANY.
*/
properties[ARG_RESTRICTION_CAPS] =
g_param_spec_boxed ("restriction-caps", "Restriction caps",
"Caps used as a final filter on the output stream", GST_TYPE_CAPS,
G_PARAM_READWRITE);
g_object_class_install_property (object_class, ARG_RESTRICTION_CAPS,
properties[ARG_RESTRICTION_CAPS]);
/**
* GESTrack:duration:
*
* Current duration of the track
*
* Default value: O
*/
/* FIXME: is duration the duration of the timeline or the duration of
* the underlying composition? */
properties[ARG_DURATION] = g_param_spec_uint64 ("duration", "Duration",
"The current duration of the track", 0, G_MAXUINT64, GST_SECOND,
G_PARAM_READABLE);
g_object_class_install_property (object_class, ARG_DURATION,
properties[ARG_DURATION]);
/**
* GESTrack:track-type:
*
* The track type of the track. This controls the type of
* #GESTrackElement-s that can be added to the track. This should
* match with the track's #GESTrack:caps.
*
* Once a track has been added to a #GESTimeline, you should not change
* this.
*/
properties[ARG_TYPE] = g_param_spec_flags ("track-type", "TrackType",
"Type of stream the track outputs",
GES_TYPE_TRACK_TYPE, GES_TRACK_TYPE_CUSTOM,
G_PARAM_READWRITE | G_PARAM_CONSTRUCT_ONLY);
g_object_class_install_property (object_class, ARG_TYPE,
properties[ARG_TYPE]);
/**
* GESTrack:mixing:
*
* Whether the track should support the mixing of #GESLayer data, such
* as composing the video data of each layer (when part of the video
* data is transparent, the next layer will become visible) or adding
* together the audio data. As such, for audio and video tracks, you'll
* likely want to keep this set to %TRUE.
*/
properties[ARG_MIXING] = g_param_spec_boolean ("mixing", "Mixing",
"Whether layer mixing is activated on the track or not",
TRUE, G_PARAM_READWRITE | G_PARAM_CONSTRUCT | G_PARAM_EXPLICIT_NOTIFY);
g_object_class_install_property (object_class, ARG_MIXING,
properties[ARG_MIXING]);
/**
* GESTrack:id:
*
* The #nlecomposition:id of the underlying #nlecomposition.
*
* Since: 1.18
*/
properties[ARG_ID] =
g_param_spec_string ("id", "Id", "The stream-id of the composition",
NULL,
G_PARAM_READWRITE | G_PARAM_STATIC_STRINGS | GST_PARAM_DOC_SHOW_DEFAULT);
g_object_class_install_property (object_class, ARG_ID, properties[ARG_ID]);
gst_element_class_add_static_pad_template (gstelement_class,
&ges_track_src_pad_template);
/**
* GESTrack::track-element-added:
* @object: The #GESTrack
* @effect: The element that was added
*
* Will be emitted after a track element is added to the track.
*/
ges_track_signals[TRACK_ELEMENT_ADDED] =
g_signal_new ("track-element-added", G_TYPE_FROM_CLASS (klass),
G_SIGNAL_RUN_FIRST, 0, NULL, NULL, NULL,
G_TYPE_NONE, 1, GES_TYPE_TRACK_ELEMENT);
/**
* GESTrack::track-element-removed:
* @object: The #GESTrack
* @effect: The element that was removed
*
* Will be emitted after a track element is removed from the track.
*/
ges_track_signals[TRACK_ELEMENT_REMOVED] =
g_signal_new ("track-element-removed", G_TYPE_FROM_CLASS (klass),
G_SIGNAL_RUN_FIRST, 0, NULL, NULL, NULL,
G_TYPE_NONE, 1, GES_TYPE_TRACK_ELEMENT);
/**
* GESTrack::commited:
* @track: The #GESTrack
*
* This signal will be emitted once the changes initiated by
* ges_track_commit() have been executed in the backend. In particular,
* this will be emitted whenever the underlying #nlecomposition has been
* committed (see #nlecomposition::commited).
*/
ges_track_signals[COMMITED] =
g_signal_new ("commited", G_TYPE_FROM_CLASS (klass),
G_SIGNAL_RUN_LAST, 0, NULL, NULL, NULL, G_TYPE_NONE, 0);
klass->get_mixing_element = NULL;
}
static void
ges_track_init (GESTrack * self)
{
self->priv = ges_track_get_instance_private (self);
self->priv->valid_thread = g_thread_self ();
self->priv->composition = gst_element_factory_make ("nlecomposition", NULL);
self->priv->capsfilter = gst_element_factory_make ("capsfilter", NULL);
self->priv->updating = TRUE;
self->priv->trackelements_by_start = g_sequence_new (NULL);
self->priv->trackelements_iter =
g_hash_table_new (g_direct_hash, g_direct_equal);
self->priv->create_element_for_gaps = NULL;
self->priv->gaps = NULL;
self->priv->mixing = TRUE;
self->priv->restriction_caps = NULL;
self->priv->last_gap_disabled = TRUE;
g_signal_connect (G_OBJECT (self->priv->composition), "notify::duration",
G_CALLBACK (composition_duration_cb), self);
g_signal_connect (G_OBJECT (self->priv->composition), "commited",
G_CALLBACK (composition_commited_cb), self);
}
/**
* ges_track_new:
* @type: The #GESTrack:track-type for the track
* @caps: (transfer full): The #GESTrack:caps for the track
*
* Creates a new track with the given track-type and caps.
*
* If @type is #GES_TRACK_TYPE_VIDEO, and @caps is a subset of
* "video/x-raw(ANY)", then a #GESVideoTrack is created. This will
* automatically choose a gap creation method suitable for video data. You
* will likely want to set #GESTrack:restriction-caps separately. You may
* prefer to use the ges_video_track_new() method instead.
*
* If @type is #GES_TRACK_TYPE_AUDIO, and @caps is a subset of
* "audio/x-raw(ANY)", then a #GESAudioTrack is created. This will
* automatically choose a gap creation method suitable for audio data, and
* will set the #GESTrack:restriction-caps to the default for
* #GESAudioTrack. You may prefer to use the ges_audio_track_new() method
* instead.
*
* Otherwise, a plain #GESTrack is returned. You will likely want to set
* the #GESTrack:restriction-caps and call
* ges_track_set_create_element_for_gap_func() on the returned track.
*
* Returns: (transfer floating): A new track.
*/
GESTrack *
ges_track_new (GESTrackType type, GstCaps * caps)
{
GESTrack *track;
GstCaps *tmpcaps;
/* TODO Be smarter with well known track types */
if (type == GES_TRACK_TYPE_VIDEO) {
tmpcaps = gst_caps_new_empty_simple ("video/x-raw");
gst_caps_set_features (tmpcaps, 0, gst_caps_features_new_any ());
if (gst_caps_is_subset (caps, tmpcaps)) {
track = GES_TRACK (ges_video_track_new ());
ges_track_set_caps (track, caps);
gst_caps_unref (tmpcaps);
/* FIXME: ges_track_set_caps does not take ownership of caps,
* so we also need to unref caps */
return track;
}
gst_caps_unref (tmpcaps);
} else if (type == GES_TRACK_TYPE_AUDIO) {
tmpcaps = gst_caps_new_empty_simple ("audio/x-raw");
gst_caps_set_features (tmpcaps, 0, gst_caps_features_new_any ());
if (gst_caps_is_subset (caps, tmpcaps)) {
track = GES_TRACK (ges_audio_track_new ());
ges_track_set_caps (track, caps);
gst_caps_unref (tmpcaps);
/* FIXME: ges_track_set_caps does not take ownership of caps,
* so we also need to unref caps */
return track;
}
gst_caps_unref (tmpcaps);
}
track = g_object_new (GES_TYPE_TRACK, "caps", caps, "track-type", type, NULL);
gst_caps_unref (caps);
return track;
}
/**
* ges_track_set_timeline:
* @track: A #GESTrack
* @timeline (nullable): A #GESTimeline
*
* Informs the track that it belongs to the given timeline. Calling this
* does not actually add the track to the timeline. For that, you should
* use ges_timeline_add_track(), which will also take care of informing
* the track that it belongs to the timeline. As such, there is no need
* for you to call this method.
*/
/* FIXME: this should probably be deprecated and only used internally */
void
ges_track_set_timeline (GESTrack * track, GESTimeline * timeline)
{
GSequenceIter *it;
g_return_if_fail (GES_IS_TRACK (track));
g_return_if_fail (timeline == NULL || GES_IS_TIMELINE (timeline));
GST_DEBUG ("track:%p, timeline:%p", track, timeline);
track->priv->timeline = timeline;
for (it = g_sequence_get_begin_iter (track->priv->trackelements_by_start);
g_sequence_iter_is_end (it) == FALSE; it = g_sequence_iter_next (it)) {
GESTimelineElement *trackelement =
GES_TIMELINE_ELEMENT (g_sequence_get (it));
ges_timeline_element_set_timeline (trackelement, timeline);
}
track_resort_and_fill_gaps (track);
}
/**
* ges_track_set_caps:
* @track: A #GESTrack
* @caps: The new caps for @track
*
* Sets the #GESTrack:caps for the track. The new #GESTrack:caps of the
* track will be a copy of @caps, except its #GstCapsFeatures will be
* automatically set to #GST_CAPS_FEATURES_ANY.
*/
void
ges_track_set_caps (GESTrack * track, const GstCaps * caps)
{
GESTrackPrivate *priv;
gint i;
g_return_if_fail (GES_IS_TRACK (track));
CHECK_THREAD (track);
GST_DEBUG ("track:%p, caps:%" GST_PTR_FORMAT, track, caps);
g_return_if_fail (GST_IS_CAPS (caps));
priv = track->priv;
if (priv->caps)
gst_caps_unref (priv->caps);
priv->caps = gst_caps_copy (caps);
for (i = 0; i < (int) gst_caps_get_size (priv->caps); i++)
gst_caps_set_features (priv->caps, i, gst_caps_features_new_any ());
g_object_set (priv->composition, "caps", caps, NULL);
/* FIXME : update all trackelements ? */
}
/**
* ges_track_set_restriction_caps:
* @track: A #GESTrack
* @caps: The new restriction-caps for @track
*
* Sets the #GESTrack:restriction-caps for the track.
*
* > **NOTE**: Restriction caps are **not** taken into account when
* > using #GESPipeline:mode=#GES_PIPELINE_MODE_SMART_RENDER.
*/
void
ges_track_set_restriction_caps (GESTrack * track, const GstCaps * caps)
{
GESTrackPrivate *priv;
g_return_if_fail (GES_IS_TRACK (track));
CHECK_THREAD (track);
GST_DEBUG ("track:%p, restriction caps:%" GST_PTR_FORMAT, track, caps);
g_return_if_fail (GST_IS_CAPS (caps));
priv = track->priv;
if (priv->restriction_caps)
gst_caps_unref (priv->restriction_caps);
priv->restriction_caps = gst_caps_copy (caps);
if (!track->priv->timeline ||
!ges_timeline_get_smart_rendering (track->priv->timeline))
g_object_set (priv->capsfilter, "caps", caps, NULL);
g_object_notify (G_OBJECT (track), "restriction-caps");
}
/**
* ges_track_update_restriction_caps:
* @track: A #GESTrack
* @caps: The caps to update the restriction-caps with
*
* Updates the #GESTrack:restriction-caps of the track using the fields
* found in the given caps. Each of the #GstStructure-s in @caps is
* compared against the existing structure with the same index in the
* current #GESTrack:restriction-caps. If there is no corresponding
* existing structure at that index, then the new structure is simply
* copied to that index. Otherwise, any fields in the new structure are
* copied into the existing structure. This will replace existing values,
* and may introduce new ones, but any fields 'missing' in the new
* structure are left unchanged in the existing structure.
*
* For example, if the existing #GESTrack:restriction-caps are
* "video/x-raw, width=480, height=360", and the updating caps is
* "video/x-raw, format=I420, width=500; video/x-bayer, width=400", then
* the new #GESTrack:restriction-caps after calling this will be
* "video/x-raw, width=500, height=360, format=I420; video/x-bayer,
* width=400".
*/
void
ges_track_update_restriction_caps (GESTrack * self, const GstCaps * caps)
{
guint i;
GstCaps *new_restriction_caps;
g_return_if_fail (GES_IS_TRACK (self));
CHECK_THREAD (self);
if (!self->priv->restriction_caps) {
ges_track_set_restriction_caps (self, caps);
return;
}
new_restriction_caps = gst_caps_copy (self->priv->restriction_caps);
for (i = 0; i < gst_caps_get_size (caps); i++) {
GstStructure *new = gst_caps_get_structure (caps, i);
if (gst_caps_get_size (new_restriction_caps) > i) {
GstStructure *original = gst_caps_get_structure (new_restriction_caps, i);
gst_structure_foreach (new, (GstStructureForeachFunc) update_field,
original);
} else
gst_caps_append_structure (new_restriction_caps,
gst_structure_copy (new));
/* FIXME: maybe appended structure should also have its CapsFeatures
* copied over? */
}
ges_track_set_restriction_caps (self, new_restriction_caps);
gst_caps_unref (new_restriction_caps);
}
/**
* ges_track_set_mixing:
* @track: A #GESTrack
* @mixing: Whether @track should be mixing
*
* Sets the #GESTrack:mixing for the track.
*/
void
ges_track_set_mixing (GESTrack * track, gboolean mixing)
{
g_return_if_fail (GES_IS_TRACK (track));
CHECK_THREAD (track);
if (mixing == track->priv->mixing) {
GST_DEBUG_OBJECT (track, "Mixing is already set to the same value");
return;
}
if (!track->priv->mixing_operation) {
GST_DEBUG_OBJECT (track, "Track will be set to mixing = %d", mixing);
goto notify;
}
if (mixing) {
if (!ges_nle_composition_add_object (track->priv->composition,
track->priv->mixing_operation)) {
GST_WARNING_OBJECT (track, "Could not add the mixer to our composition");
return;
}
} else {
if (!ges_nle_composition_remove_object (track->priv->composition,
track->priv->mixing_operation)) {
GST_WARNING_OBJECT (track,
"Could not remove the mixer from our composition");
return;
}
}
notify:
track->priv->mixing = mixing;
if (track->priv->timeline)
ges_timeline_set_smart_rendering (track->priv->timeline,
ges_timeline_get_smart_rendering (track->priv->timeline));
g_object_notify_by_pspec (G_OBJECT (track), properties[ARG_MIXING]);
GST_DEBUG_OBJECT (track, "The track has been set to mixing = %d", mixing);
}
static gboolean
remove_element_internal (GESTrack * track, GESTrackElement * object,
gboolean emit, GError ** error)
{
GSequenceIter *it;
GESTrackPrivate *priv = track->priv;
GST_DEBUG_OBJECT (track, "Removing %" GST_PTR_FORMAT, object);
it = g_hash_table_lookup (priv->trackelements_iter, object);
g_sequence_remove (it);
if (remove_object_internal (track, object, emit, error) == TRUE) {
ges_timeline_element_set_timeline (GES_TIMELINE_ELEMENT (object), NULL);
return TRUE;
}
g_hash_table_insert (track->priv->trackelements_iter, object,
g_sequence_insert_sorted (track->priv->trackelements_by_start, object,
(GCompareDataFunc) element_start_compare, NULL));
return FALSE;
}
/**
* ges_track_add_element_full:
* @track: A #GESTrack
* @object: (transfer floating): The element to add
* @error: (nullable): Return location for an error
*
* Adds the given track element to the track, which takes ownership of the
* element.
*
* Note that this can fail if it would break a configuration rule of the
* track's #GESTimeline.
*
* Note that a #GESTrackElement can only be added to one track.
*
* Returns: %TRUE if @object was successfully added to @track.
* Since: 1.18
*/
gboolean
ges_track_add_element_full (GESTrack * track, GESTrackElement * object,
GError ** error)
{
GESTimeline *timeline;
GESTimelineElement *el;
g_return_val_if_fail (GES_IS_TRACK (track), FALSE);
g_return_val_if_fail (GES_IS_TRACK_ELEMENT (object), FALSE);
g_return_val_if_fail (!error || !*error, FALSE);
el = GES_TIMELINE_ELEMENT (object);
CHECK_THREAD (track);
GST_DEBUG ("track:%p, object:%p", track, object);
if (G_UNLIKELY (ges_track_element_get_track (object) != NULL)) {
GST_WARNING ("Object already belongs to another track");
gst_object_ref_sink (object);
gst_object_unref (object);
return FALSE;
}
if (!ges_track_element_set_track (object, track, error)) {
GST_INFO_OBJECT (track, "Failed to set the track for %" GES_FORMAT,
GES_ARGS (object));
gst_object_ref_sink (object);
gst_object_unref (object);
return FALSE;
}
ges_timeline_element_set_timeline (el, NULL);
GST_DEBUG ("Adding object %s to ourself %s",
GST_OBJECT_NAME (ges_track_element_get_nleobject (object)),
GST_OBJECT_NAME (track->priv->composition));
if (G_UNLIKELY (!ges_nle_composition_add_object (track->priv->composition,
ges_track_element_get_nleobject (object)))) {
GST_WARNING ("Couldn't add object to the NleComposition");
if (!ges_track_element_set_track (object, NULL, NULL))
GST_ERROR_OBJECT (track, "Failed to unset track of element %"
GES_FORMAT, GES_ARGS (object));
gst_object_ref_sink (object);
gst_object_unref (object);
return FALSE;
}
gst_object_ref_sink (object);
g_hash_table_insert (track->priv->trackelements_iter, object,
g_sequence_insert_sorted (track->priv->trackelements_by_start, object,
(GCompareDataFunc) element_start_compare, NULL));
timeline = track->priv->timeline;
ges_timeline_element_set_timeline (el, timeline);
/* check that we haven't broken the timeline configuration by adding this
* element to the track */
if (timeline
&& !timeline_tree_can_move_element (timeline_get_tree (timeline), el,
GES_TIMELINE_ELEMENT_LAYER_PRIORITY (el), el->start, el->duration,
error)) {
GST_INFO_OBJECT (track,
"Could not add the track element %" GES_FORMAT
" to the track because it breaks the timeline " "configuration rules",
GES_ARGS (el));
remove_element_internal (track, object, FALSE, NULL);
return FALSE;
}
g_signal_emit (track, ges_track_signals[TRACK_ELEMENT_ADDED], 0,
GES_TRACK_ELEMENT (object));
return TRUE;
}
/**
* ges_track_add_element:
* @track: A #GESTrack
* @object: (transfer floating): The element to add
*
* See ges_track_add_element(), which also gives an error.
*
* Returns: %TRUE if @object was successfully added to @track.
*/
gboolean
ges_track_add_element (GESTrack * track, GESTrackElement * object)
{
return ges_track_add_element_full (track, object, NULL);
}
/**
* ges_track_get_elements:
* @track: A #GESTrack
*
* Gets the track elements contained in the track. The returned list is
* sorted by the element's #GESTimelineElement:priority and
* #GESTimelineElement:start.
*
* Returns: (transfer full) (element-type GESTrackElement): A list of
* all the #GESTrackElement-s in @track.
*/
GList *
ges_track_get_elements (GESTrack * track)
{
GList *ret = NULL;
g_return_val_if_fail (GES_IS_TRACK (track), NULL);
CHECK_THREAD (track);
g_sequence_foreach (track->priv->trackelements_by_start,
(GFunc) add_trackelement_to_list_foreach, &ret);
ret = g_list_reverse (ret);
return ret;
}
/**
* ges_track_remove_element_full:
* @track: A #GESTrack
* @object: The element to remove
* @error: (nullable): Return location for an error
*
* Removes the given track element from the track, which revokes
* ownership of the element.
*
* Returns: %TRUE if @object was successfully removed from @track.
* Since: 1.18
*/
gboolean
ges_track_remove_element_full (GESTrack * track, GESTrackElement * object,
GError ** error)
{
g_return_val_if_fail (GES_IS_TRACK (track), FALSE);
g_return_val_if_fail (GES_IS_TRACK_ELEMENT (object), FALSE);
g_return_val_if_fail (!error || !*error, FALSE);
if (!track->priv->timeline
|| !ges_timeline_is_disposed (track->priv->timeline))
CHECK_THREAD (track);
return remove_element_internal (track, object, TRUE, error);
}
/**
* ges_track_remove_element:
* @track: A #GESTrack
* @object: The element to remove
*
* See ges_track_remove_element_full(), which also returns an error.
*
* Returns: %TRUE if @object was successfully removed from @track.
*/
gboolean
ges_track_remove_element (GESTrack * track, GESTrackElement * object)
{
return ges_track_remove_element_full (track, object, NULL);
}
/**
* ges_track_get_caps:
* @track: A #GESTrack
*
* Get the #GESTrack:caps of the track.
*
* Returns: The caps of @track.
*/
const GstCaps *
ges_track_get_caps (GESTrack * track)
{
g_return_val_if_fail (GES_IS_TRACK (track), NULL);
CHECK_THREAD (track);
return track->priv->caps;
}
/**
* ges_track_get_timeline:
* @track: A #GESTrack
*
* Get the timeline this track belongs to.
*
* Returns: (nullable): The timeline that @track belongs to, or %NULL if
* it does not belong to a timeline.
*/
const GESTimeline *
ges_track_get_timeline (GESTrack * track)
{
g_return_val_if_fail (GES_IS_TRACK (track), NULL);
CHECK_THREAD (track);
return track->priv->timeline;
}
/**
* ges_track_get_mixing:
* @track: A #GESTrack
*
* Gets the #GESTrack:mixing of the track.
*
* Returns: Whether @track is mixing.
*/
gboolean
ges_track_get_mixing (GESTrack * track)
{
g_return_val_if_fail (GES_IS_TRACK (track), FALSE);
return track->priv->mixing;
}
/**
* ges_track_commit:
* @track: A #GESTrack
*
* Commits all the pending changes for the elements contained in the
* track.
*
* When changes are made to the timing or priority of elements within a
* track, they are not directly executed for the underlying
* #nlecomposition and its children. This method will finally execute
* these changes so they are reflected in the data output of the track.
*
* Any pending changes will be executed in the backend. The
* #GESTimeline::commited signal will be emitted once this has completed.
*
* Note that ges_timeline_commit() will call this method on all of its
* tracks, so you are unlikely to need to use this directly.
*
* Returns: %TRUE if pending changes were committed, or %FALSE if nothing
* needed to be committed.
*/
gboolean
ges_track_commit (GESTrack * track)
{
g_return_val_if_fail (GES_IS_TRACK (track), FALSE);
CHECK_THREAD (track);
track_resort_and_fill_gaps (track);
return ges_nle_object_commit (track->priv->composition, TRUE);
}
/**
* ges_track_set_create_element_for_gap_func:
* @track: A #GESTrack
* @func: (scope notified): The function to be used to create a source
* #GstElement that can fill gaps in @track
*
* Sets the function that will be used to create a #GstElement that can be
* used as a source to fill the gaps of the track. A gap is a timeline
* region where the track has no #GESTrackElement sources. Therefore, you
* are likely to want the #GstElement returned by the function to always
* produce 'empty' content, defined relative to the stream type, such as
* transparent frames for a video, or mute samples for audio.
*
* #GESAudioTrack and #GESVideoTrack objects are created with such a
* function already set appropriately.
*/
void
ges_track_set_create_element_for_gap_func (GESTrack * track,
GESCreateElementForGapFunc func)
{
g_return_if_fail (GES_IS_TRACK (track));
CHECK_THREAD (track);
track->priv->create_element_for_gaps = func;
}
/**
* ges_track_get_restriction_caps:
* @track: A #GESTrack
*
* Gets the #GESTrack:restriction-caps of the track.
*
* Returns: (transfer full): The restriction-caps of @track.
*
* Since: 1.18
*/
GstCaps *
ges_track_get_restriction_caps (GESTrack * track)
{
GESTrackPrivate *priv;
g_return_val_if_fail (GES_IS_TRACK (track), NULL);
CHECK_THREAD (track);
priv = track->priv;
if (priv->restriction_caps)
return gst_caps_ref (priv->restriction_caps);
return NULL;
}
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