Sets our main struct and passes it to the parent class.
Create a new instance of #GstCollectPads.
Add a pad to the collection of collect pads. The pad has to be a sinkpad. The refcount of the pad is incremented. Use gst_collect_pads_remove_pad() to remove the pad from the collection again.
Query how much bytes can be read from each queued buffer. This means that the result of this call is the maximum number of bytes that can be read from each of the pads.
Convenience clipping function that converts incoming buffer's timestamp to running time, or clips the buffer if outside configured segment.
Default #GstCollectPads event handling that elements should always chain up to to ensure proper operation. Element might however indicate event should not be forwarded downstream.
Flush @size bytes from the pad @data.
Get the main Gtk struct
the main Gtk struct as a void*
Peek at the buffer currently queued in @data. This function should be called with the @pads STREAM_LOCK held, such as in the callback handler.
Pop the buffer currently queued in @data. This function should be called with the @pads STREAM_LOCK held, such as in the callback handler.
Default #GstCollectPads query handling that elements should always chain up to to ensure proper operation. Element might however indicate query should not be forwarded downstream.
Get a subbuffer of @size bytes from the given pad @data.
Remove a pad from the collection of collect pads. This function will also free the #GstCollectData and all the resources that were allocated with gst_collect_pads_add_pad().
Set the callback function and user data that will be called with the oldest buffer when all pads have been collected, or %NULL on EOS. If a buffer is passed, the callback owns a reference and must unref it.
Install a clipping function that is called right after a buffer is received on a pad managed by @pads. See #GstCollectPadsClipFunction for more info.
Set the timestamp comparison function.
Set the event callback function and user data that will be called when collectpads has received an event originating from one of the collected pads. If the event being processed is a serialized one, this callback is called with @pads STREAM_LOCK held, otherwise not. As this lock should be held when calling a number of CollectPads functions, it should be acquired if so (unusually) needed.
Install a flush function that is called when the internal state of all pads should be flushed as part of flushing seek handling. See #GstCollectPadsFlushFunction for more info.
Change the flushing state of all the pads in the collection. No pad is able to accept anymore data when @flushing is %TRUE. Calling this function with @flushing %FALSE makes @pads accept data again. Caller must ensure that downstream streaming (thread) is not blocked, e.g. by sending a FLUSH_START downstream.
CollectPads provides a default collection algorithm that will determine the oldest buffer available on all of its pads, and then delegate to a configured callback. However, if circumstances are more complicated and/or more control is desired, this sets a callback that will be invoked instead when all the pads added to the collection have buffers queued. Evidently, this callback is not compatible with gst_collect_pads_set_buffer_function() callback. If this callback is set, the former will be unset.
Set the query callback function and user data that will be called after collectpads has received a query originating from one of the collected pads. If the query being processed is a serialized one, this callback is called with @pads STREAM_LOCK held, otherwise not. As this lock should be held when calling a number of CollectPads functions, it should be acquired if so (unusually) needed.
Sets a pad to waiting or non-waiting mode, if at least this pad has not been created with locked waiting state, in which case nothing happens.
Default #GstCollectPads event handling for the src pad of elements. Elements can chain up to this to let flushing seek event handling be done by #GstCollectPads.
Starts the processing of data in the collect_pads.
Stops the processing of data in the collect_pads. this function will also unblock any blocking operations.
Get a subbuffer of @size bytes from the given pad @data. Flushes the amount of read bytes.
the main Gtk struct
the main Gtk struct
Get the main Gtk struct
the main Gtk struct as a void*
Checks to see if there is any object named @name in @list. This function does not do any locking of any kind. You might want to protect the provided list with the lock of the owner of the list. This function will lock each #GstObject in the list to compare the name, so be careful when passing a list with a locked object.
A default deep_notify signal callback for an object. The user data should contain a pointer to an array of strings that should be excluded from the notify. The default handler will print the new value of the property using g_print.
Increase the reference count of @object, and possibly remove the floating reference, if @object has a floating reference.
Atomically modifies a pointer to point to a new object. The reference count of @oldobj is decreased and the reference count of @newobj is increased.
Attach the #GstControlBinding to the object. If there already was a #GstControlBinding for this property it will be replaced.
A default error function that uses g_printerr() to display the error message and the optional debug sting..
Gets the corresponding #GstControlBinding for the property. This should be unreferenced again after use.
Obtain the control-rate for this @object. Audio processing #GstElement objects will use this rate to sub-divide their processing loop and call gst_object_sync_values() inbetween. The length of the processing segment should be up to @control-rate nanoseconds.
Gets a number of #GValues for the given controlled property starting at the requested time. The array @values need to hold enough space for @n_values of #GValue.
Returns a copy of the name of @object. Caller should g_free() the return value after usage. For a nameless object, this returns %NULL, which you can safely g_free() as well.
Returns the parent of @object. This function increases the refcount of the parent object so you should gst_object_unref() it after usage.
Generates a string describing the path of @object in the object hierarchy. Only useful (or used) for debugging.
Gets the value for the given controlled property at the requested time.
Gets a number of values for the given controlled property starting at the requested time. The array @values need to hold enough space for @n_values of the same type as the objects property's type.
Check if the @object has active controlled properties.
Check if @object has an ancestor @ancestor somewhere up in the hierarchy. One can e.g. check if a #GstElement is inside a #GstPipeline.
Check if @object has an ancestor @ancestor somewhere up in the hierarchy. One can e.g. check if a #GstElement is inside a #GstPipeline.
Check if @parent is the parent of @object. E.g. a #GstElement can check if it owns a given #GstPad.
Increments the reference count on @object. This function does not take the lock on @object because it relies on atomic refcounting.
Removes the corresponding #GstControlBinding. If it was the last ref of the binding, it will be disposed.
This function is used to disable the control bindings on a property for some time, i.e. gst_object_sync_values() will do nothing for the property.
This function is used to disable all controlled properties of the @object for some time, i.e. gst_object_sync_values() will do nothing.
Change the control-rate for this @object. Audio processing #GstElement objects will use this rate to sub-divide their processing loop and call gst_object_sync_values() inbetween. The length of the processing segment should be up to @control-rate nanoseconds.
Sets the name of @object, or gives @object a guaranteed unique name (if @name is %NULL). This function makes a copy of the provided name, so the caller retains ownership of the name it sent.
Sets the parent of @object to @parent. The object's reference count will be incremented, and any floating reference will be removed (see gst_object_ref_sink()).
Returns a suggestion for timestamps where buffers should be split to get best controller results.
Sets the properties of the object, according to the #GstControlSources that (maybe) handle them and for the given timestamp.
Clear the parent of @object, removing the associated reference. This function decreases the refcount of @object.
Decrements the reference count on @object. If reference count hits zero, destroy @object. This function does not take the lock on @object as it relies on atomic refcounting.
The deep notify signal is used to be notified of property changes. It is typically attached to the toplevel bin to receive notifications from all the elements contained in that bin.
Manages a set of pads that operate in collect mode. This means that control is given to the manager of this object when all pads have data.
* Collectpads are created with gst_collect_pads_new(). A callback should then be installed with gst_collect_pads_set_function ().
* Pads are added to the collection with gst_collect_pads_add_pad()/ gst_collect_pads_remove_pad(). The pad has to be a sinkpad. The chain and event functions of the pad are overridden. The element_private of the pad is used to store private information for the collectpads.
* For each pad, data is queued in the _chain function or by performing a pull_range.
* When data is queued on all pads in waiting mode, the callback function is called.
* Data can be dequeued from the pad with the gst_collect_pads_pop() method. One can peek at the data with the gst_collect_pads_peek() function. These functions will return %NULL if the pad received an EOS event. When all pads return %NULL from a gst_collect_pads_peek(), the element can emit an EOS event itself.
* Data can also be dequeued in byte units using the gst_collect_pads_available(), gst_collect_pads_read_buffer() and gst_collect_pads_flush() calls.
* Elements should call gst_collect_pads_start() and gst_collect_pads_stop() in their state change functions to start and stop the processing of the collectpads. The gst_collect_pads_stop() call should be called before calling the parent element state change function in the PAUSED_TO_READY state change to ensure no pad is blocked and the element can finish streaming.
* gst_collect_pads_set_waiting() sets a pad to waiting or non-waiting mode. CollectPads element is not waiting for data to be collected on non-waiting pads. Thus these pads may but need not have data when the callback is called. All pads are in waiting mode by default.