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gst/playback/: Remove the autoplug-sort signal and replace it with a binding friendly autoplug-select signal.

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Original commit message from CVS:
Inspired by patch of: René Stadler <mail at renestadler dot de>
* gst/playback/gstdecodebin2.c: (gst_decode_bin_class_init),
(gst_decode_bin_autoplug_continue),
(gst_decode_bin_autoplug_factories),
(gst_decode_bin_autoplug_select), (analyze_new_pad), (connect_pad),
(find_compatibles):
* gst/playback/gstplay-marshal.list:
Remove the autoplug-sort signal and replace it with a binding friendly
autoplug-select signal.
Add an autoplug-factories signal that can be used to generate a list of
factories to try to autoplug.
Add the GstPad to the autoplugging signal args as it might be needed to
make a good factory selection.
Fix up the marshallers for this. Fixes #407282.
This commit is contained in:
Wim Taymans 2007-10-24 11:07:57 +00:00
parent d33e6ca818
commit 77cef56895
3 changed files with 151 additions and 75 deletions
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18
ChangeLog
View file

@ -1,3 +1,21 @@
2007-10-24 Wim Taymans <wim.taymans@gmail.com>
Inspired by patch of: René Stadler <mail at renestadler dot de>
* gst/playback/gstdecodebin2.c: (gst_decode_bin_class_init),
(gst_decode_bin_autoplug_continue),
(gst_decode_bin_autoplug_factories),
(gst_decode_bin_autoplug_select), (analyze_new_pad), (connect_pad),
(find_compatibles):
* gst/playback/gstplay-marshal.list:
Remove the autoplug-sort signal and replace it with a binding friendly
autoplug-select signal.
Add an autoplug-factories signal that can be used to generate a list of
factories to try to autoplug.
Add the GstPad to the autoplugging signal args as it might be needed to
make a good factory selection.
Fix up the marshallers for this. Fixes #407282.
2007-10-23 Tim-Philipp Müller <tim at centricular dot net>
* gst-libs/gst/tag/gsttagdemux.c:

203
gst/playback/gstdecodebin2.c
View file

@ -110,11 +110,16 @@ struct _GstDecodeBinClass
void (*removed_decoded_pad) (GstElement * element, GstPad * pad);
/* signal fired when we found a pad that we cannot decode */
void (*unknown_type) (GstElement * element, GstPad * pad, GstCaps * caps);
/* signal fired to know if we continue trying to decode the given caps */
gboolean (*autoplug_continue) (GstElement * element, GstCaps * caps);
/* signal fired to reorder the proposed list of factories */
gboolean (*autoplug_sort) (GstElement * element, GstCaps * caps,
GList ** list);
gboolean (*autoplug_continue) (GstElement * element, GstPad * pad,
GstCaps * caps);
/* signal fired to get a list of factories to try to autoplug */
GValueArray *(*autoplug_factories) (GstElement * element, GstPad * pad,
GstCaps * caps);
/* signal fired to select from the proposed list of factories */
gint (*autoplug_select) (GstElement * element, GstPad * pad, GstCaps * caps,
GValueArray * factories);
};
/* signals */
@ -124,7 +129,8 @@ enum
SIGNAL_REMOVED_DECODED_PAD,
SIGNAL_UNKNOWN_TYPE,
SIGNAL_AUTOPLUG_CONTINUE,
SIGNAL_AUTOPLUG_SORT,
SIGNAL_AUTOPLUG_FACTORIES,
SIGNAL_AUTOPLUG_SELECT,
LAST_SIGNAL
};
@ -152,9 +158,12 @@ static void type_found (GstElement * typefind, guint probability,
GstCaps * caps, GstDecodeBin * decode_bin);
static gboolean gst_decode_bin_autoplug_continue (GstElement * element,
GstCaps * caps);
static gboolean gst_decode_bin_autoplug_sort (GstElement * element,
GstCaps * caps, GList ** list);
GstPad * pad, GstCaps * caps);
static GValueArray *gst_decode_bin_autoplug_factories (GstElement *
element, GstPad * pad, GstCaps * caps);
static gint gst_decode_bin_autoplug_select (GstElement * element,
GstPad * pad, GstCaps * caps, GValueArray * list);
static void gst_decode_bin_set_property (GObject * object, guint prop_id,
const GValue * value, GParamSpec * pspec);
static void gst_decode_bin_get_property (GObject * object, guint prop_id,
@ -346,7 +355,6 @@ gst_decode_bin_class_init (GstDecodeBinClass * klass)
* This signal gets emitted as soon as a new pad of the same type as one of
* the valid 'raw' types is added.
*/
gst_decode_bin_signals[SIGNAL_NEW_DECODED_PAD] =
g_signal_new ("new-decoded-pad", G_TYPE_FROM_CLASS (klass),
G_SIGNAL_RUN_LAST,
@ -360,7 +368,6 @@ gst_decode_bin_class_init (GstDecodeBinClass * klass)
*
* This signal is emitted when a 'final' caps pad has been removed.
*/
gst_decode_bin_signals[SIGNAL_REMOVED_DECODED_PAD] =
g_signal_new ("removed-decoded-pad", G_TYPE_FROM_CLASS (klass),
G_SIGNAL_RUN_LAST,
@ -375,7 +382,6 @@ gst_decode_bin_class_init (GstDecodeBinClass * klass)
* This signal is emitted when a pad for which there is no further possible
* decoding is added to the decodebin.
*/
gst_decode_bin_signals[SIGNAL_UNKNOWN_TYPE] =
g_signal_new ("unknown-type", G_TYPE_FROM_CLASS (klass),
G_SIGNAL_RUN_LAST, G_STRUCT_OFFSET (GstDecodeBinClass, unknown_type),
@ -384,6 +390,7 @@ gst_decode_bin_class_init (GstDecodeBinClass * klass)
/**
* GstDecodeBin2::autoplug-continue:
* @pad: The #GstPad.
* @caps: The #GstCaps found.
*
* This signal is emitted whenever decodebin2 finds a new stream. It is
@ -394,34 +401,51 @@ gst_decode_bin_class_init (GstDecodeBinClass * klass)
* final and the pad will be exposed as such (see 'new-decoded-pad'
* signal).
*/
gst_decode_bin_signals[SIGNAL_AUTOPLUG_CONTINUE] =
g_signal_new ("autoplug-continue", G_TYPE_FROM_CLASS (klass),
G_SIGNAL_RUN_LAST, G_STRUCT_OFFSET (GstDecodeBinClass, autoplug_continue),
_gst_boolean_accumulator, NULL, gst_play_marshal_BOOLEAN__OBJECT,
G_TYPE_BOOLEAN, 1, GST_TYPE_CAPS);
_gst_boolean_accumulator, NULL, gst_play_marshal_BOOLEAN__OBJECT_OBJECT,
G_TYPE_BOOLEAN, 2, GST_TYPE_PAD, GST_TYPE_CAPS);
/**
* GstDecodeBin2::autoplug-sort:
* GstDecodeBin2::autoplug-factories:
* @pad: The #GstPad.
* @caps: The #GstCaps found.
*
* This function is emited when an array of possible factories for @caps on
* @pad is needed. Decodebin2 will by default return
*
* Returns: a #GValueArray* with a list of factories to try. The factories are
* by default tried in the returned order or based on the index returned by
* "autoplug-select".
*/
gst_decode_bin_signals[SIGNAL_AUTOPLUG_FACTORIES] =
g_signal_new ("autoplug-factories", G_TYPE_FROM_CLASS (klass),
G_SIGNAL_RUN_LAST, G_STRUCT_OFFSET (GstDecodeBinClass,
autoplug_factories), NULL, NULL,
gst_play_marshal_BOXED__OBJECT_OBJECT, G_TYPE_VALUE_ARRAY, 2,
GST_TYPE_PAD, GST_TYPE_CAPS);
/**
* GstDecodeBin2::autoplug-select:
* @pad: The #GstPad.
* @caps: The #GstCaps.
* @factories: A #GList of possible #GstElementFactory to use.
* @factories: A #GValueArray of possible #GstElementFactory to use, sorted by
* rank (higher ranks come first).
*
* This signal is emitted once decodebin2 has found all the possible
* #GstElementFactory that can be used to handle the given @caps.
*
* UNSTABLE API. Will change soon.
*
* Returns: #TRUE if you wish decodebin2 to start trying to decode
* the given @caps with the list of factories. #FALSE if you do not want
* these #GstCaps, if so the pad will be exposed as unknown (see
* 'unknown-type' signal).
* Returns: A #gint indicating what factory index from the @factories array
* that you wish decodebin2 to use for trying to decode the given @caps.
* -1 to stop selection of a factory. The default handler always
* returns the first possible factory.
*/
gst_decode_bin_signals[SIGNAL_AUTOPLUG_SORT] =
g_signal_new ("autoplug-sort", G_TYPE_FROM_CLASS (klass),
G_SIGNAL_RUN_LAST, G_STRUCT_OFFSET (GstDecodeBinClass, autoplug_sort),
_gst_boolean_accumulator, NULL, gst_play_marshal_BOOLEAN__OBJECT_POINTER,
G_TYPE_BOOLEAN, 2, GST_TYPE_CAPS, G_TYPE_POINTER);
gst_decode_bin_signals[SIGNAL_AUTOPLUG_SELECT] =
g_signal_new ("autoplug-select", G_TYPE_FROM_CLASS (klass),
G_SIGNAL_RUN_LAST, G_STRUCT_OFFSET (GstDecodeBinClass, autoplug_select),
NULL, NULL, gst_play_marshal_INT__OBJECT_OBJECT_BOXED,
G_TYPE_INT, 3, GST_TYPE_PAD, GST_TYPE_CAPS, G_TYPE_VALUE_ARRAY);
g_object_class_install_property (gobject_klass, PROP_CAPS,
g_param_spec_boxed ("caps", "Caps", "The caps on which to stop decoding.",
@ -429,7 +453,9 @@ gst_decode_bin_class_init (GstDecodeBinClass * klass)
klass->autoplug_continue =
GST_DEBUG_FUNCPTR (gst_decode_bin_autoplug_continue);
klass->autoplug_sort = GST_DEBUG_FUNCPTR (gst_decode_bin_autoplug_sort);
klass->autoplug_factories =
GST_DEBUG_FUNCPTR (gst_decode_bin_autoplug_factories);
klass->autoplug_select = GST_DEBUG_FUNCPTR (gst_decode_bin_autoplug_select);
gst_element_class_add_pad_template (gstelement_klass,
gst_static_pad_template_get (&decoder_bin_sink_template));
@ -700,24 +726,42 @@ gst_decode_bin_get_caps (GstDecodeBin * dbin)
return caps;
}
static GValueArray *find_compatibles (GstDecodeBin * decode_bin,
GstPad * pad, const GstCaps * caps);
/*****
* Default autoplug signal handlers
*****/
static gboolean
gst_decode_bin_autoplug_continue (GstElement * element, GstCaps * caps)
gst_decode_bin_autoplug_continue (GstElement * element, GstPad * pad,
GstCaps * caps)
{
/* by default we always continue */
return TRUE;
}
static gboolean
gst_decode_bin_autoplug_sort (GstElement * element, GstCaps * caps,
GList ** list)
static GValueArray *
gst_decode_bin_autoplug_factories (GstElement * element, GstPad * pad,
GstCaps * caps)
{
return TRUE;
GValueArray *result;
/* return all compatible factories for caps */
result = find_compatibles (GST_DECODE_BIN (element), pad, caps);
return result;
}
static gint
gst_decode_bin_autoplug_select (GstElement * element, GstPad * pad,
GstCaps * caps, GValueArray * factories)
{
g_return_val_if_fail (factories != NULL, -1);
g_return_val_if_fail (factories->n_values > 0, -1);
/* Return first factory. */
return 0;
}
/********
* Discovery methods
@ -725,11 +769,10 @@ gst_decode_bin_autoplug_sort (GstElement * element, GstCaps * caps,
static gboolean are_raw_caps (GstDecodeBin * dbin, GstCaps * caps);
static gboolean is_demuxer_element (GstElement * srcelement);
static GList *find_compatibles (GstDecodeBin * decode_bin,
const GstCaps * caps);
static gboolean connect_pad (GstDecodeBin * dbin, GstElement * src,
GstPad * pad, GList * factories, GstDecodeGroup * group);
GstPad * pad, GstCaps * caps, GValueArray * factories,
GstDecodeGroup * group);
static gboolean connect_element (GstDecodeBin * dbin, GstElement * element,
GstDecodeGroup * group);
static void expose_pad (GstDecodeBin * dbin, GstElement * src, GstPad * pad,
@ -754,8 +797,7 @@ analyze_new_pad (GstDecodeBin * dbin, GstElement * src, GstPad * pad,
GstCaps * caps, GstDecodeGroup * group)
{
gboolean apcontinue = TRUE;
GList *factories = NULL;
gboolean apsort = TRUE;
GValueArray *factories = NULL;
GST_DEBUG_OBJECT (dbin, "Pad %s:%s caps:%" GST_PTR_FORMAT,
GST_DEBUG_PAD_NAME (pad), caps);
@ -766,9 +808,11 @@ analyze_new_pad (GstDecodeBin * dbin, GstElement * src, GstPad * pad,
if (gst_caps_is_any (caps))
goto any_caps;
/* 1. Emit 'autoplug-continue' */
/* 1. Emit 'autoplug-continue' the result will tell us if this pads needs
* further autoplugging. */
g_signal_emit (G_OBJECT (dbin),
gst_decode_bin_signals[SIGNAL_AUTOPLUG_CONTINUE], 0, caps, &apcontinue);
gst_decode_bin_signals[SIGNAL_AUTOPLUG_CONTINUE], 0, pad, caps,
&apcontinue);
/* 1.a if autoplug-continue is FALSE or caps is a raw format, goto pad_is_final */
if ((!apcontinue) || are_raw_caps (dbin, caps))
@ -779,18 +823,11 @@ analyze_new_pad (GstDecodeBin * dbin, GstElement * src, GstPad * pad,
if (!gst_caps_is_fixed (caps))
goto non_fixed;
/* 1.c else if there's no compatible factory or 'autoplug-sort' returned FALSE, goto pad_not_used */
if ((factories = find_compatibles (dbin, caps))) {
/* emit autoplug-sort */
g_signal_emit (G_OBJECT (dbin),
gst_decode_bin_signals[SIGNAL_AUTOPLUG_SORT],
0, caps, &factories, &apsort);
if (!apsort) {
g_list_free (factories);
/* User doesn't want that pad */
goto pad_not_wanted;
}
} else {
/* 1.c else if there's no compatible factory goto unknown_type */
g_signal_emit (G_OBJECT (dbin),
gst_decode_bin_signals[SIGNAL_AUTOPLUG_FACTORIES], 0, pad, caps,
&factories);
if (factories == NULL) {
/* no compatible factories */
goto unknown_type;
}
@ -798,8 +835,8 @@ analyze_new_pad (GstDecodeBin * dbin, GstElement * src, GstPad * pad,
/* 1.d else goto pad_is_valid */
GST_LOG_OBJECT (pad, "Let's continue discovery on this pad");
connect_pad (dbin, src, pad, factories, group);
g_list_free (factories);
connect_pad (dbin, src, pad, caps, factories, group);
g_value_array_free (factories);
return;
@ -810,12 +847,6 @@ expose_pad:
return;
}
pad_not_wanted:
{
GST_LOG_OBJECT (pad, "User doesn't want this pad, stopping discovery");
return;
}
unknown_type:
{
GST_LOG_OBJECT (pad, "Unknown type, firing signal");
@ -870,13 +901,14 @@ setup_caps_delay:
static gboolean
connect_pad (GstDecodeBin * dbin, GstElement * src, GstPad * pad,
GList * factories, GstDecodeGroup * group)
GstCaps * caps, GValueArray * factories, GstDecodeGroup * group)
{
gboolean res = FALSE;
GList *tmp;
GstPad *mqpad = NULL;
g_return_val_if_fail (factories != NULL, FALSE);
g_return_val_if_fail (factories->n_values > 0, FALSE);
GST_DEBUG_OBJECT (dbin, "pad %s:%s , group:%p",
GST_DEBUG_PAD_NAME (pad), group);
@ -898,11 +930,33 @@ connect_pad (GstDecodeBin * dbin, GstElement * src, GstPad * pad,
}
/* 2. Try to create an element and link to it */
for (tmp = factories; tmp; tmp = g_list_next (tmp)) {
GstElementFactory *factory = (GstElementFactory *) tmp->data;
while (factories->n_values > 0) {
gint factidx;
GstElementFactory *factory;
GstElement *element;
GstPad *sinkpad;
/* emit autoplug-select */
g_signal_emit (G_OBJECT (dbin),
gst_decode_bin_signals[SIGNAL_AUTOPLUG_SELECT],
0, pad, caps, factories, &factidx);
/* when the function returns -1, we leave the loop and stop */
if (factidx == -1) {
GST_DEBUG_OBJECT (dbin, "autoplug select returned -1");
break;
}
GST_DEBUG_OBJECT (dbin, "autoplug select returned %d", factidx);
factory = g_value_get_object (g_value_array_get_nth (factories, factidx));
/* factory is != NULL now since the default handler selects the first
* factory if all connected user handlers returned NULL. */
/* Remove selected factory from the list. */
g_value_array_remove (factories, factidx);
/* 2.1. Try to create an element */
if ((element = gst_element_factory_create (factory, NULL)) == NULL) {
GST_WARNING_OBJECT (dbin, "Could not create an element from %s",
@ -1279,14 +1333,14 @@ caps_notify_group_cb (GstPad * pad, GParamSpec * unused, GstDecodeGroup * group)
gst_object_unref (element);
}
/* this function runs through the element factories and returns a list
* of all elements that are able to sink the given caps
/* this function runs through the element factories and returns a value array of
* all elements that are able to sink the given caps
*/
static GList *
find_compatibles (GstDecodeBin * decode_bin, const GstCaps * caps)
static GValueArray *
find_compatibles (GstDecodeBin * decode_bin, GstPad * pad, const GstCaps * caps)
{
GList *factories;
GList *to_try = NULL;
GValueArray *to_try = g_value_array_new (0);
/* loop over all the factories */
for (factories = decode_bin->factories; factories;
@ -1314,7 +1368,11 @@ find_compatibles (GstDecodeBin * decode_bin, const GstCaps * caps)
/* check if the intersection is empty */
if (!gst_caps_is_empty (intersect)) {
/* non empty intersection, we can use this element */
to_try = g_list_prepend (to_try, factory);
GValue val = { 0, };
g_value_init (&val, G_TYPE_OBJECT);
g_value_set_object (&val, factory);
g_value_array_append (to_try, &val);
g_value_unset (&val);
gst_caps_unref (intersect);
break;
}
@ -1322,7 +1380,6 @@ find_compatibles (GstDecodeBin * decode_bin, const GstCaps * caps)
}
}
}
to_try = g_list_reverse (to_try);
return to_try;
}

5
gst/playback/gstplay-marshal.list
View file

@ -1,3 +1,4 @@
BOOLEAN:OBJECT
BOOLEAN:OBJECT,OBJECT
BOXED:OBJECT,OBJECT
VOID:OBJECT,BOOLEAN
BOOLEAN:OBJECT,POINTER
INT:OBJECT,OBJECT,BOXED