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xml-formatter: Refactor the way we handle loading state

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This commit is contained in:
Thibault Saunier 2019-06-15 16:44:50 -04:00
parent 33bac10cc8
commit 90943667ce
1 changed files with 69 additions and 70 deletions
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139
ges/ges-base-xml-formatter.c
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@ -59,12 +59,24 @@ typedef struct PendingAsset
gchar *id;
} PendingAsset;
/* @STATE_CHECK_LOADABLE: Quickly check if XML is valid
* @STATE_ASSETS: start loading all assets asynchronously
* and setup all elements that are synchronously loadable (tracks, and layers basically).
* @STATE_LOADING_CLIPS: adding clips and groups to the timeline
*/
typedef enum
{
STATE_CHECK_LOADABLE,
STATE_LOADING_ASSETS_AND_SYNC,
STATE_LOADING_CLIPS,
} LoadingState;
struct _GESBaseXmlFormatterPrivate
{
GMarkupParseContext *parsecontext;
gchar *xmlcontent;
gsize xmlsize;
gboolean check_only;
LoadingState state;
/* Clip.ID -> Clip */
GHashTable *containers;
@ -86,20 +98,26 @@ struct _GESBaseXmlFormatterPrivate
gboolean timeline_auto_transition;
GList *groups;
/* %TRUE if running the first pass, %FALSE otherwise.
* During the first pass we start loading all assets asynchronously
* and setup all elements that are synchronously loadable (tracks, and layers basically).
*
* In the second pass we add clips and groups o the timeline
*/
gboolean first_pass;
};
static void new_asset_cb (GESAsset * source, GAsyncResult * res,
PendingAsset * passet);
static const gchar *
loading_state_name (LoadingState state)
{
switch (state) {
case STATE_CHECK_LOADABLE:
return "check-loadable";
case STATE_LOADING_ASSETS_AND_SYNC:
return "loading-assets-and-sync";
case STATE_LOADING_CLIPS:
return "loading-clips";
}
return "??";
}
static void
_free_layer_entry (LayerEntry * entry)
@ -132,7 +150,7 @@ compare_assets_for_loading (PendingAsset * a, PendingAsset * b)
}
static GMarkupParseContext *
_parse (GESBaseXmlFormatter * self, GError ** error, gboolean first_pass)
_parse (GESBaseXmlFormatter * self, GError ** error, LoadingState state)
{
GError *err = NULL;
GMarkupParseContext *parsecontext = NULL;
@ -150,8 +168,8 @@ _parse (GESBaseXmlFormatter * self, GError ** error, gboolean first_pass)
parsecontext = g_markup_parse_context_new (&self_class->content_parser,
G_MARKUP_TREAT_CDATA_AS_TEXT, self, NULL);
priv->first_pass = first_pass;
GST_DEBUG_OBJECT (self, "Running %s pass", first_pass ? "first" : "second");
priv->state = state;
GST_DEBUG_OBJECT (self, "Running %s pass", loading_state_name (state));
if (!g_markup_parse_context_parse (parsecontext, priv->xmlcontent,
priv->xmlsize, &err))
goto failed;
@ -191,7 +209,7 @@ failed:
static GMarkupParseContext *
_load_and_parse (GESBaseXmlFormatter * self, const gchar * uri, GError ** error,
gboolean first_pass)
LoadingState state)
{
GFile *file = NULL;
GESBaseXmlFormatterPrivate *priv = _GET_PRIV (self);
@ -213,7 +231,7 @@ _load_and_parse (GESBaseXmlFormatter * self, const gchar * uri, GError ** error,
NULL, &err))
goto failed;
return _parse (self, error, first_pass);
return _parse (self, error, state);
failed:
GST_WARNING ("failed to load contents from \"%s\"", uri);
@ -234,11 +252,7 @@ _can_load_uri (GESFormatter * dummy_formatter, const gchar * uri,
GMarkupParseContext *ctx;
GESBaseXmlFormatter *self = GES_BASE_XML_FORMATTER (dummy_formatter);
/* we create a temporary object so we can use it as a context */
_GET_PRIV (self)->check_only = TRUE;
ctx = _load_and_parse (self, uri, error, TRUE);
ctx = _load_and_parse (self, uri, error, STATE_CHECK_LOADABLE);
if (!ctx)
return FALSE;
@ -255,7 +269,8 @@ _load_from_uri (GESFormatter * self, GESTimeline * timeline, const gchar * uri,
ges_timeline_set_auto_transition (timeline, FALSE);
priv->parsecontext =
_load_and_parse (GES_BASE_XML_FORMATTER (self), uri, error, TRUE);
_load_and_parse (GES_BASE_XML_FORMATTER (self), uri, error,
STATE_LOADING_ASSETS_AND_SYNC);
if (!priv->parsecontext)
return FALSE;
@ -379,7 +394,6 @@ ges_base_xml_formatter_init (GESBaseXmlFormatter * self)
priv = self->priv;
priv->check_only = FALSE;
priv->parsecontext = NULL;
priv->pending_assets = NULL;
@ -482,9 +496,9 @@ _loading_done (GESFormatter * self)
}
g_list_free_full (assets, g_object_unref);
if (priv->first_pass) {
if (priv->state == STATE_LOADING_ASSETS_AND_SYNC) {
GST_INFO_OBJECT (self, "Assets cached... now loading the timeline.");
_parse (GES_BASE_XML_FORMATTER (self), NULL, FALSE);
_parse (GES_BASE_XML_FORMATTER (self), NULL, STATE_LOADING_CLIPS);
g_assert (priv->pending_assets == NULL);
}
@ -803,15 +817,13 @@ ges_base_xml_formatter_add_asset (GESBaseXmlFormatter * self,
PendingAsset *passet;
GESBaseXmlFormatterPrivate *priv = _GET_PRIV (self);
if (!priv->first_pass) {
GST_INFO ("Already parsed assets");
if (priv->state != STATE_LOADING_ASSETS_AND_SYNC) {
GST_INFO ("Not parsing assets in %s state",
loading_state_name (priv->state));
return;
}
if (priv->check_only)
return;
passet = g_slice_new0 (PendingAsset);
passet->metadatas = g_strdup (metadatas);
passet->id = g_strdup (id);
@ -836,14 +848,12 @@ ges_base_xml_formatter_add_clip (GESBaseXmlFormatter * self,
LayerEntry *entry;
GESBaseXmlFormatterPrivate *priv = _GET_PRIV (self);
if (priv->first_pass) {
GST_DEBUG_OBJECT (self, "First pass, not adding clip related objects");
if (priv->state != STATE_LOADING_CLIPS) {
GST_DEBUG_OBJECT (self, "Not adding clip in %s state.",
loading_state_name (priv->state));
return;
}
if (priv->check_only)
return;
entry = g_hash_table_lookup (priv->layers, GINT_TO_POINTER (layer_prio));
if (entry == NULL) {
g_set_error (error, GES_ERROR, GES_ERROR_FORMATTER_MALFORMED_INPUT_FILE,
@ -917,14 +927,12 @@ ges_base_xml_formatter_add_layer (GESBaseXmlFormatter * self,
gboolean auto_transition = FALSE;
GESBaseXmlFormatterPrivate *priv = _GET_PRIV (self);
if (!priv->first_pass) {
GST_INFO_OBJECT (self, "Second pass, layers are already loaded.");
if (priv->state != STATE_LOADING_ASSETS_AND_SYNC) {
GST_INFO_OBJECT (self, "Not loading layer in %s state.",
loading_state_name (priv->state));
return;
}
if (priv->check_only)
return;
if (extractable_type == G_TYPE_NONE)
layer = ges_layer_new ();
else {
@ -971,12 +979,9 @@ ges_base_xml_formatter_add_track (GESBaseXmlFormatter * self,
GESTrack *track;
GESBaseXmlFormatterPrivate *priv = _GET_PRIV (self);
if (!priv->first_pass) {
GST_DEBUG_OBJECT (self, "Second pass, tracks are already set.");
return;
}
if (priv->check_only) {
if (priv->state != STATE_LOADING_ASSETS_AND_SYNC) {
GST_INFO_OBJECT (self, "Not loading track in %s state.",
loading_state_name (priv->state));
return;
}
@ -1016,8 +1021,9 @@ ges_base_xml_formatter_add_control_binding (GESBaseXmlFormatter * self,
GESBaseXmlFormatterPrivate *priv = _GET_PRIV (self);
GESTrackElement *element = NULL;
if (priv->first_pass) {
GST_DEBUG_OBJECT (self, "First pass, not adding clip related objects");
if (priv->state != STATE_LOADING_CLIPS) {
GST_DEBUG_OBJECT (self, "Not loading control bindings in %s state.",
loading_state_name (priv->state));
return;
}
@ -1053,8 +1059,9 @@ ges_base_xml_formatter_add_source (GESBaseXmlFormatter * self,
GESBaseXmlFormatterPrivate *priv = _GET_PRIV (self);
GESTrackElement *element = NULL;
if (priv->first_pass) {
GST_DEBUG_OBJECT (self, "First pass, not adding clip related objects");
if (priv->state == STATE_LOADING_CLIPS) {
GST_DEBUG_OBJECT (self, "Not loading source elements in %s state.",
loading_state_name (priv->state));
return;
}
@ -1085,14 +1092,12 @@ ges_base_xml_formatter_add_track_element (GESBaseXmlFormatter * self,
GESAsset *asset = NULL;
GESBaseXmlFormatterPrivate *priv = _GET_PRIV (self);
if (priv->first_pass) {
GST_INFO_OBJECT (self, "First pass, not adding clip related objects");
if (priv->state != STATE_LOADING_CLIPS) {
GST_DEBUG_OBJECT (self, "Not loading track elements in %s state.",
loading_state_name (priv->state));
return;
}
if (priv->check_only)
return;
if (g_type_is_a (track_element_type, GES_TYPE_TRACK_ELEMENT) == FALSE) {
GST_DEBUG_OBJECT (self, "%s is not a TrackElement, can not create it",
g_type_name (track_element_type));
@ -1152,15 +1157,12 @@ ges_base_xml_formatter_add_encoding_profile (GESBaseXmlFormatter * self,
GstEncodingContainerProfile *parent_profile = NULL;
GESBaseXmlFormatterPrivate *priv = _GET_PRIV (self);
if (!priv->first_pass) {
GST_DEBUG_OBJECT (self,
"Second pass, encoding profiles are already ready.");
if (priv->state != STATE_LOADING_ASSETS_AND_SYNC) {
GST_DEBUG_OBJECT (self, "Not loading encoding profiles in %s state.",
loading_state_name (priv->state));
return;
}
if (priv->check_only)
goto done;
if (parent == NULL) {
profile =
_create_profile (self, type, parent, name, description, format, preset,
@ -1220,14 +1222,12 @@ ges_base_xml_formatter_add_group (GESBaseXmlFormatter * self,
PendingGroup *pgroup;
GESBaseXmlFormatterPrivate *priv = _GET_PRIV (self);
if (!priv->first_pass) {
GST_DEBUG_OBJECT (self, "First pass, not adding clip related objects");
if (priv->state != STATE_LOADING_ASSETS_AND_SYNC) {
GST_DEBUG_OBJECT (self, "Not loading groups in %s state.",
loading_state_name (priv->state));
return;
}
if (priv->check_only)
return;
pgroup = g_slice_new0 (PendingGroup);
pgroup->group = ges_group_new ();
@ -1249,14 +1249,13 @@ ges_base_xml_formatter_last_group_add_child (GESBaseXmlFormatter * self,
PendingGroup *pgroup;
GESBaseXmlFormatterPrivate *priv = _GET_PRIV (self);
if (priv->first_pass) {
GST_DEBUG_OBJECT (self, "First pass, not adding clip related objects");
if (priv->state != STATE_LOADING_CLIPS) {
GST_DEBUG_OBJECT (self, "Not adding children to groups in %s state.",
loading_state_name (priv->state));
return;
}
if (priv->check_only)
return;
g_return_if_fail (priv->groups);
pgroup = priv->groups->data;