ORC_SOURCE=blendorc
include $(top_srcdir)/common/orc.mak
-libgstvideomixer_la_SOURCES = videomixer.c blend.c
+libgstvideomixer_la_SOURCES = \
+ videomixer.c \
+ blend.c \
+ videomixer2.c \
+ gstcollectpads2.c
+
nodist_libgstvideomixer_la_SOURCES = $(ORC_NODIST_SOURCES)
libgstvideomixer_la_CFLAGS = $(GST_PLUGINS_BASE_CFLAGS) \
- $(GST_BASE_CFLAGS) $(GST_CONTROLLER_CFLAGS) $(GST_CFLAGS) $(ORC_CFLAGS)
-libgstvideomixer_la_LIBADD = $(GST_PLUGINS_BASE_LIBS) -lgstvideo-@GST_MAJORMINOR@ \
+ $(GST_BASE_CFLAGS) $(GST_CONTROLLER_CFLAGS) $(GST_CFLAGS) $(ORC_CFLAGS) \
+ -DGstCollectPads2=GstVideoMixer2Pads \
+ -DGstCollectPads2Class=GstVideoMixer2PadsClass
+libgstvideomixer_la_LIBADD = $(GST_PLUGINS_BASE_LIBS) \
+ -lgstvideo-@GST_MAJORMINOR@ \
$(GST_BASE_LIBS) $(GST_CONTROLLER_LIBS) $(GST_LIBS) $(ORC_LIBS)
libgstvideomixer_la_LDFLAGS = $(GST_PLUGIN_LDFLAGS)
libgstvideomixer_la_LIBTOOLFLAGS = --tag=disable-static
# headers we need but don't want installed
-noinst_HEADERS = videomixer.h videomixerpad.h blend.h
+noinst_HEADERS = \
+ videomixer.h \
+ videomixerpad.h \
+ blend.h \
+ videomixer2.h \
+ gstcollectpads2.h
--- /dev/null
+/* GStreamer
+ * Copyright (C) 2005 Wim Taymans <wim@fluendo.com>
+ * Copyright (C) 2008 Mark Nauwelaerts <mnauw@users.sourceforge.net>
+ * Copyright (C) 2010 Sebastian Dröge <sebastian.droege@collabora.co.uk>
+ *
+ * gstcollectpads2.c:
+ *
+ * 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.
+ */
+/**
+ * SECTION:gstcollectpads2
+ * @short_description: manages a set of pads that operate in collect mode
+ * @see_also:
+ *
+ * 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.
+ * <itemizedlist>
+ * <listitem><para>
+ * Collectpads are created with gst_collect_pads2_new(). A callback should then
+ * be installed with gst_collect_pads2_set_function ().
+ * </para></listitem>
+ * <listitem><para>
+ * Pads are added to the collection with gst_collect_pads2_add_pad()/
+ * gst_collect_pads2_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.
+ * </para></listitem>
+ * <listitem><para>
+ * For each pad, data is queued in the _chain function or by
+ * performing a pull_range.
+ * </para></listitem>
+ * <listitem><para>
+ * When data is queued on all pads in waiting mode, the callback function is called.
+ * </para></listitem>
+ * <listitem><para>
+ * Data can be dequeued from the pad with the gst_collect_pads2_pop() method.
+ * One can peek at the data with the gst_collect_pads2_peek() function.
+ * These functions will return NULL if the pad received an EOS event. When all
+ * pads return NULL from a gst_collect_pads2_peek(), the element can emit an EOS
+ * event itself.
+ * </para></listitem>
+ * <listitem><para>
+ * Data can also be dequeued in byte units using the gst_collect_pads2_available(),
+ * gst_collect_pads2_read() and gst_collect_pads2_flush() calls.
+ * </para></listitem>
+ * <listitem><para>
+ * Elements should call gst_collect_pads2_start() and gst_collect_pads2_stop() in
+ * their state change functions to start and stop the processing of the collectpads.
+ * The gst_collect_pads2_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.
+ * </para></listitem>
+ * <listitem><para>
+ * gst_collect_pads2_collect() and gst_collect_pads2_collect_range() can be used by
+ * elements that start a #GstTask to drive the collect_pads2. This feature is however
+ * not yet implemented.
+ * </para></listitem>
+ * <listitem><para>
+ * gst_collect_pads2_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.
+ * </para></listitem>
+ * </itemizedlist>
+ *
+ * Last reviewed on 2008-03-14 (0.10.17)
+ */
+
+#include "gstcollectpads2.h"
+
+GST_DEBUG_CATEGORY_STATIC (collect_pads2_debug);
+#define GST_CAT_DEFAULT collect_pads2_debug
+
+GST_BOILERPLATE (GstCollectPads2, gst_collect_pads2, GstObject,
+ GST_TYPE_OBJECT);
+
+static void gst_collect_pads2_clear (GstCollectPads2 * pads,
+ GstCollectData2 * data);
+static GstFlowReturn gst_collect_pads2_chain (GstPad * pad, GstBuffer * buffer);
+static gboolean gst_collect_pads2_event (GstPad * pad, GstEvent * event);
+static void gst_collect_pads2_finalize (GObject * object);
+static GstFlowReturn gst_collect_pads2_default_collected (GstCollectPads2 *
+ pads, gpointer user_data);
+static gint gst_collect_pads2_default_compare_func (GstCollectPads2 * pads,
+ GstCollectData2 * data1, GstClockTime timestamp1, GstCollectData2 * data2,
+ GstClockTime timestamp2, gpointer user_data);
+static gboolean gst_collect_pads2_recalculate_full (GstCollectPads2 * pads);
+static void ref_data (GstCollectData2 * data);
+static void unref_data (GstCollectData2 * data);
+
+/* Some properties are protected by LOCK, others by STREAM_LOCK
+ * However, manipulating either of these partitions may require
+ * to signal/wake a _WAIT, so use a separate (sort of) event to prevent races
+ * Alternative implementations are possible, e.g. some low-level re-implementing
+ * of the 2 above locks to drop both of them atomically when going into _WAIT.
+ */
+#define GST_COLLECT_PADS2_GET_EVT_COND(pads) (((GstCollectPads2 *)pads)->evt_cond)
+#define GST_COLLECT_PADS2_GET_EVT_LOCK(pads) (((GstCollectPads2 *)pads)->evt_lock)
+#define GST_COLLECT_PADS2_EVT_WAIT(pads, cookie) G_STMT_START { \
+ g_mutex_lock (GST_COLLECT_PADS2_GET_EVT_LOCK (pads)); \
+ /* should work unless a lot of event'ing and thread starvation */\
+ while (cookie == ((GstCollectPads2 *) pads)->evt_cookie) \
+ g_cond_wait (GST_COLLECT_PADS2_GET_EVT_COND (pads), \
+ GST_COLLECT_PADS2_GET_EVT_LOCK (pads)); \
+ cookie = ((GstCollectPads2 *) pads)->evt_cookie; \
+ g_mutex_unlock (GST_COLLECT_PADS2_GET_EVT_LOCK (pads)); \
+} G_STMT_END
+#define GST_COLLECT_PADS2_EVT_WAIT_TIMED(pads, cookie, timeout) G_STMT_START { \
+ GTimeVal __tv; \
+ \
+ g_get_current_time (&tv); \
+ g_time_val_add (&tv, timeout); \
+ \
+ g_mutex_lock (GST_COLLECT_PADS2_GET_EVT_LOCK (pads)); \
+ /* should work unless a lot of event'ing and thread starvation */\
+ while (cookie == ((GstCollectPads2 *) pads)->evt_cookie) \
+ g_cond_timed_wait (GST_COLLECT_PADS2_GET_EVT_COND (pads), \
+ GST_COLLECT_PADS2_GET_EVT_LOCK (pads), &tv); \
+ cookie = ((GstCollectPads2 *) pads)->evt_cookie; \
+ g_mutex_unlock (GST_COLLECT_PADS2_GET_EVT_LOCK (pads)); \
+} G_STMT_END
+#define GST_COLLECT_PADS2_EVT_BROADCAST(pads) G_STMT_START { \
+ g_mutex_lock (GST_COLLECT_PADS2_GET_EVT_LOCK (pads)); \
+ /* never mind wrap-around */ \
+ ++(((GstCollectPads2 *) pads)->evt_cookie); \
+ g_cond_broadcast (GST_COLLECT_PADS2_GET_EVT_COND (pads)); \
+ g_mutex_unlock (GST_COLLECT_PADS2_GET_EVT_LOCK (pads)); \
+} G_STMT_END
+#define GST_COLLECT_PADS2_EVT_INIT(cookie) G_STMT_START { \
+ g_mutex_lock (GST_COLLECT_PADS2_GET_EVT_LOCK (pads)); \
+ cookie = ((GstCollectPads2 *) pads)->evt_cookie; \
+ g_mutex_unlock (GST_COLLECT_PADS2_GET_EVT_LOCK (pads)); \
+} G_STMT_END
+
+static void
+gst_collect_pads2_base_init (gpointer g_class)
+{
+ /* Do nothing here */
+}
+
+static void
+gst_collect_pads2_class_init (GstCollectPads2Class * klass)
+{
+ GObjectClass *gobject_class = (GObjectClass *) klass;
+
+ GST_DEBUG_CATEGORY_INIT (collect_pads2_debug, "collectpads2", 0,
+ "GstCollectPads2");
+
+ gobject_class->finalize = GST_DEBUG_FUNCPTR (gst_collect_pads2_finalize);
+}
+
+static void
+gst_collect_pads2_init (GstCollectPads2 * pads, GstCollectPads2Class * g_class)
+{
+ pads->data = NULL;
+ pads->cookie = 0;
+ pads->numpads = 0;
+ pads->queuedpads = 0;
+ pads->eospads = 0;
+ pads->started = FALSE;
+
+ g_static_rec_mutex_init (&pads->stream_lock);
+
+ pads->func = gst_collect_pads2_default_collected;
+ pads->user_data = NULL;
+ pads->event_func = NULL;
+ pads->event_user_data = NULL;
+
+ pads->prepare_buffer_func = NULL;
+ pads->prepare_buffer_user_data = NULL;
+
+ /* members for default muxing */
+ pads->buffer_func = NULL;
+ pads->buffer_user_data = NULL;
+ pads->compare_func = gst_collect_pads2_default_compare_func;
+ pads->compare_user_data = NULL;
+ pads->earliest_data = NULL;
+ pads->earliest_time = GST_CLOCK_TIME_NONE;
+
+ /* members to manage the pad list */
+ pads->pad_cookie = 0;
+ pads->pad_list = NULL;
+
+ /* members for event */
+ pads->evt_lock = g_mutex_new ();
+ pads->evt_cond = g_cond_new ();
+ pads->evt_cookie = 0;
+}
+
+static void
+gst_collect_pads2_finalize (GObject * object)
+{
+ GstCollectPads2 *pads = GST_COLLECT_PADS2 (object);
+
+ GST_DEBUG_OBJECT (object, "finalize");
+
+ g_static_rec_mutex_free (&pads->stream_lock);
+
+ g_cond_free (pads->evt_cond);
+ g_mutex_free (pads->evt_lock);
+
+ /* Remove pads and free pads list */
+ g_slist_foreach (pads->pad_list, (GFunc) unref_data, NULL);
+ g_slist_foreach (pads->data, (GFunc) unref_data, NULL);
+ g_slist_free (pads->data);
+ g_slist_free (pads->pad_list);
+
+ G_OBJECT_CLASS (parent_class)->finalize (object);
+}
+
+/**
+ * gst_collect_pads2_new:
+ *
+ * Create a new instance of #GstCollectsPads.
+ *
+ * Returns: a new #GstCollectPads2, or NULL in case of an error.
+ *
+ * MT safe.
+ */
+GstCollectPads2 *
+gst_collect_pads2_new (void)
+{
+ GstCollectPads2 *newcoll;
+
+ newcoll = g_object_new (GST_TYPE_COLLECT_PADS2, NULL);
+
+ return newcoll;
+}
+
+/**
+ * gst_collect_pads2_set_prepare_buffer_function:
+ * @pads: the collectpads to use
+ * @func: the function to set
+ * @user_data: user data passed to the function
+ *
+ * Set the callback function and user data that will be called
+ * for every buffer that arrives.
+ *
+ * MT safe.
+ */
+void
+gst_collect_pads2_set_prepare_buffer_function (GstCollectPads2 * pads,
+ GstCollectPads2BufferFunction func, gpointer user_data)
+{
+ g_return_if_fail (pads != NULL);
+ g_return_if_fail (GST_IS_COLLECT_PADS2 (pads));
+
+ GST_OBJECT_LOCK (pads);
+ pads->prepare_buffer_func = func;
+ pads->prepare_buffer_user_data = user_data;
+ GST_OBJECT_UNLOCK (pads);
+}
+
+/* Must be called with GstObject lock! */
+static void
+gst_collect_pads2_set_buffer_function_locked (GstCollectPads2 * pads,
+ GstCollectPads2BufferFunction func, gpointer user_data)
+{
+ pads->buffer_func = func;
+ pads->buffer_user_data = user_data;
+}
+
+/**
+ * gst_collect_pads2_set_buffer_function:
+ * @pads: the collectpads to use
+ * @func: the function to set
+ * @user_data: user data passed to the function
+ *
+ * Set the callback function and user data that will be called with
+ * the oldest buffer when all pads have been collected.
+ *
+ * MT safe.
+ */
+void
+gst_collect_pads2_set_buffer_function (GstCollectPads2 * pads,
+ GstCollectPads2BufferFunction func, gpointer user_data)
+{
+ g_return_if_fail (pads != NULL);
+ g_return_if_fail (GST_IS_COLLECT_PADS2 (pads));
+
+ GST_OBJECT_LOCK (pads);
+ gst_collect_pads2_set_buffer_function_locked (pads, func, user_data);
+ GST_OBJECT_UNLOCK (pads);
+}
+
+/**
+ * gst_collect_pads2_set_compare_function:
+ * @pads: the pads to use
+ * @func: the function to set
+ * @user_data: user data passed to the function
+ *
+ * Set the timestamp comparison function.
+ *
+ * MT safe.
+ */
+/* NOTE allowing to change comparison seems not advisable;
+no known use-case, and collaboration with default algorithm is unpredictable.
+If custom compairing/operation is needed, just use a collect function of
+your own */
+void
+gst_collect_pads2_set_compare_function (GstCollectPads2 * pads,
+ GstCollectPads2CompareFunction func, gpointer user_data)
+{
+ g_return_if_fail (pads != NULL);
+ g_return_if_fail (GST_IS_COLLECT_PADS2 (pads));
+
+ GST_OBJECT_LOCK (pads);
+ pads->compare_func = func;
+ pads->compare_user_data = user_data;
+ GST_OBJECT_UNLOCK (pads);
+}
+
+/**
+ * gst_collect_pads2_set_function:
+ * @pads: the collectspads to use
+ * @func: the function to set
+ * @user_data: user data passed to the function
+ *
+ * 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_pads2_set_buffer_function() callback.
+ * If this callback is set, the former will be unset.
+ *
+ * MT safe.
+ */
+void
+gst_collect_pads2_set_function (GstCollectPads2 * pads,
+ GstCollectPads2Function func, gpointer user_data)
+{
+ g_return_if_fail (pads != NULL);
+ g_return_if_fail (GST_IS_COLLECT_PADS2 (pads));
+
+ GST_OBJECT_LOCK (pads);
+ pads->func = func;
+ pads->user_data = user_data;
+ gst_collect_pads2_set_buffer_function_locked (pads, NULL, NULL);
+ GST_OBJECT_UNLOCK (pads);
+}
+
+static void
+ref_data (GstCollectData2 * data)
+{
+ g_assert (data != NULL);
+
+ g_atomic_int_inc (&(data->refcount));
+}
+
+static void
+unref_data (GstCollectData2 * data)
+{
+ g_assert (data != NULL);
+ g_assert (data->refcount > 0);
+
+ if (!g_atomic_int_dec_and_test (&(data->refcount)))
+ return;
+
+ if (data->destroy_notify)
+ data->destroy_notify (data);
+
+ g_object_unref (data->pad);
+ if (data->buffer) {
+ gst_buffer_unref (data->buffer);
+ }
+ g_free (data);
+}
+
+/**
+ * gst_collect_pads2_set_event_function:
+ * @pads: the collectspads to use
+ * @func: the function to set
+ * @user_data: user data passed to the function
+ *
+ * Set the event callback function and user data that will be called after
+ * collectpads has processed and 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.
+ *
+ * MT safe.
+ */
+void
+gst_collect_pads2_set_event_function (GstCollectPads2 * pads,
+ GstCollectPads2EventFunction func, gpointer user_data)
+{
+ g_return_if_fail (pads != NULL);
+ g_return_if_fail (GST_IS_COLLECT_PADS2 (pads));
+
+ GST_OBJECT_LOCK (pads);
+ pads->event_func = func;
+ pads->event_user_data = user_data;
+ GST_OBJECT_UNLOCK (pads);
+}
+
+/**
+ * gst_collect_pads2_add_pad:
+ * @pads: the collectspads to use
+ * @pad: the pad to add
+ * @size: the size of the returned #GstCollectData2 structure
+ *
+ * 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_pads2_remove_pad() to remove the pad from the collection
+ * again.
+ *
+ * You specify a size for the returned #GstCollectData2 structure
+ * so that you can use it to store additional information.
+ *
+ * The pad will be automatically activated in push mode when @pads is
+ * started.
+ *
+ * This function calls gst_collect_pads2_add_pad() passing a value of NULL
+ * for destroy_notify and TRUE for locked.
+ *
+ * Returns: a new #GstCollectData2 to identify the new pad. Or NULL
+ * if wrong parameters are supplied.
+ *
+ * MT safe.
+ */
+GstCollectData2 *
+gst_collect_pads2_add_pad (GstCollectPads2 * pads, GstPad * pad, guint size)
+{
+ return gst_collect_pads2_add_pad_full (pads, pad, size, NULL, TRUE);
+}
+
+/**
+ * gst_collect_pads2_add_pad_full:
+ * @pads: the collectspads to use
+ * @pad: the pad to add
+ * @size: the size of the returned #GstCollectData2 structure
+ * @destroy_notify: function to be called before the returned #GstCollectData2
+ * structure is freed
+ * @lock: whether to lock this pad in usual waiting state
+ *
+ * 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_pads2_remove_pad() to remove the pad from the collection
+ * again.
+ *
+ * You specify a size for the returned #GstCollectData2 structure
+ * so that you can use it to store additional information.
+ *
+ * You can also specify a #GstCollectData2DestroyNotify that will be called
+ * just before the #GstCollectData2 structure is freed. It is passed the
+ * pointer to the structure and should free any custom memory and resources
+ * allocated for it.
+ *
+ * Keeping a pad locked in waiting state is only relevant when using
+ * the default collection algorithm (providing the oldest buffer).
+ * It ensures a buffer must be available on this pad for a collection
+ * to take place. This is of typical use to a muxer element where
+ * non-subtitle streams should always be in waiting state,
+ * e.g. to assure that caps information is available on all these streams
+ * when initial headers have to be written.
+ *
+ * The pad will be automatically activated in push mode when @pads is
+ * started.
+ *
+ * Since: 0.10.12
+ *
+ * Returns: a new #GstCollectData2 to identify the new pad. Or NULL
+ * if wrong parameters are supplied.
+ *
+ * MT safe.
+ */
+GstCollectData2 *
+gst_collect_pads2_add_pad_full (GstCollectPads2 * pads, GstPad * pad,
+ guint size, GstCollectData2DestroyNotify destroy_notify, gboolean lock)
+{
+ GstCollectData2 *data;
+
+ g_return_val_if_fail (pads != NULL, NULL);
+ g_return_val_if_fail (GST_IS_COLLECT_PADS2 (pads), NULL);
+ g_return_val_if_fail (pad != NULL, NULL);
+ g_return_val_if_fail (GST_PAD_IS_SINK (pad), NULL);
+ g_return_val_if_fail (size >= sizeof (GstCollectData2), NULL);
+
+ GST_DEBUG_OBJECT (pads, "adding pad %s:%s", GST_DEBUG_PAD_NAME (pad));
+
+ data = g_malloc0 (size);
+ data->collect = pads;
+ data->pad = gst_object_ref (pad);
+ data->buffer = NULL;
+ data->pos = 0;
+ gst_segment_init (&data->segment, GST_FORMAT_UNDEFINED);
+ data->state = GST_COLLECT_PADS2_STATE_WAITING;
+ data->state |= lock ? GST_COLLECT_PADS2_STATE_LOCKED : 0;
+ data->refcount = 1;
+ data->destroy_notify = destroy_notify;
+
+ GST_OBJECT_LOCK (pads);
+ GST_OBJECT_LOCK (pad);
+ gst_pad_set_element_private (pad, data);
+ GST_OBJECT_UNLOCK (pad);
+ pads->pad_list = g_slist_append (pads->pad_list, data);
+ gst_pad_set_chain_function (pad, GST_DEBUG_FUNCPTR (gst_collect_pads2_chain));
+ gst_pad_set_event_function (pad, GST_DEBUG_FUNCPTR (gst_collect_pads2_event));
+ /* backward compat, also add to data if stopped, so that the element already
+ * has this in the public data list before going PAUSED (typically)
+ * this can only be done when we are stopped because we don't take the
+ * STREAM_LOCK to protect the pads->data list. */
+ if (!pads->started) {
+ pads->data = g_slist_append (pads->data, data);
+ ref_data (data);
+ }
+ /* activate the pad when needed */
+ if (pads->started)
+ gst_pad_set_active (pad, TRUE);
+ pads->pad_cookie++;
+ GST_OBJECT_UNLOCK (pads);
+
+ return data;
+}
+
+static gint
+find_pad (GstCollectData2 * data, GstPad * pad)
+{
+ if (data->pad == pad)
+ return 0;
+ return 1;
+}
+
+/**
+ * gst_collect_pads2_remove_pad:
+ * @pads: the collectspads to use
+ * @pad: the pad to remove
+ *
+ * Remove a pad from the collection of collect pads. This function will also
+ * free the #GstCollectData2 and all the resources that were allocated with
+ * gst_collect_pads2_add_pad().
+ *
+ * The pad will be deactivated automatically when @pads is stopped.
+ *
+ * Returns: %TRUE if the pad could be removed.
+ *
+ * MT safe.
+ */
+gboolean
+gst_collect_pads2_remove_pad (GstCollectPads2 * pads, GstPad * pad)
+{
+ GstCollectData2 *data;
+ GSList *list;
+
+ g_return_val_if_fail (pads != NULL, FALSE);
+ g_return_val_if_fail (GST_IS_COLLECT_PADS2 (pads), FALSE);
+ g_return_val_if_fail (pad != NULL, FALSE);
+ g_return_val_if_fail (GST_IS_PAD (pad), FALSE);
+
+ GST_DEBUG_OBJECT (pads, "removing pad %s:%s", GST_DEBUG_PAD_NAME (pad));
+
+ GST_OBJECT_LOCK (pads);
+ list = g_slist_find_custom (pads->pad_list, pad, (GCompareFunc) find_pad);
+ if (!list)
+ goto unknown_pad;
+
+ data = (GstCollectData2 *) list->data;
+
+ GST_DEBUG_OBJECT (pads, "found pad %s:%s at %p", GST_DEBUG_PAD_NAME (pad),
+ data);
+
+ /* clear the stuff we configured */
+ gst_pad_set_chain_function (pad, NULL);
+ gst_pad_set_event_function (pad, NULL);
+ GST_OBJECT_LOCK (pad);
+ gst_pad_set_element_private (pad, NULL);
+ GST_OBJECT_UNLOCK (pad);
+
+ /* backward compat, also remove from data if stopped, note that this function
+ * can only be called when we are stopped because we don't take the
+ * STREAM_LOCK to protect the pads->data list. */
+ if (!pads->started) {
+ GSList *dlist;
+
+ dlist = g_slist_find_custom (pads->data, pad, (GCompareFunc) find_pad);
+ if (dlist) {
+ GstCollectData2 *pdata = dlist->data;
+
+ pads->data = g_slist_delete_link (pads->data, dlist);
+ unref_data (pdata);
+ }
+ }
+ /* remove from the pad list */
+ pads->pad_list = g_slist_delete_link (pads->pad_list, list);
+ pads->pad_cookie++;
+
+ /* signal waiters because something changed */
+ GST_COLLECT_PADS2_EVT_BROADCAST (pads);
+
+ /* deactivate the pad when needed */
+ if (!pads->started)
+ gst_pad_set_active (pad, FALSE);
+
+ /* clean and free the collect data */
+ unref_data (data);
+
+ GST_OBJECT_UNLOCK (pads);
+
+ return TRUE;
+
+unknown_pad:
+ {
+ GST_WARNING_OBJECT (pads, "cannot remove unknown pad %s:%s",
+ GST_DEBUG_PAD_NAME (pad));
+ GST_OBJECT_UNLOCK (pads);
+ return FALSE;
+ }
+}
+
+/**
+ * gst_collect_pads2_is_active:
+ * @pads: the collectspads to use
+ * @pad: the pad to check
+ *
+ * Check if a pad is active.
+ *
+ * This function is currently not implemented.
+ *
+ * Returns: %TRUE if the pad is active.
+ *
+ * MT safe.
+ */
+gboolean
+gst_collect_pads2_is_active (GstCollectPads2 * pads, GstPad * pad)
+{
+ g_return_val_if_fail (pads != NULL, FALSE);
+ g_return_val_if_fail (GST_IS_COLLECT_PADS2 (pads), FALSE);
+ g_return_val_if_fail (pad != NULL, FALSE);
+ g_return_val_if_fail (GST_IS_PAD (pad), FALSE);
+
+ g_warning ("gst_collect_pads2_is_active() is not implemented");
+
+ return FALSE;
+}
+
+/**
+ * gst_collect_pads2_collect:
+ * @pads: the collectspads to use
+ *
+ * Collect data on all pads. This function is usually called
+ * from a #GstTask function in an element.
+ *
+ * This function is currently not implemented.
+ *
+ * Returns: #GstFlowReturn of the operation.
+ *
+ * MT safe.
+ */
+GstFlowReturn
+gst_collect_pads2_collect (GstCollectPads2 * pads)
+{
+ g_return_val_if_fail (pads != NULL, GST_FLOW_ERROR);
+ g_return_val_if_fail (GST_IS_COLLECT_PADS2 (pads), GST_FLOW_ERROR);
+
+ g_warning ("gst_collect_pads2_collect() is not implemented");
+
+ return GST_FLOW_NOT_SUPPORTED;
+}
+
+/**
+ * gst_collect_pads2_collect_range:
+ * @pads: the collectspads to use
+ * @offset: the offset to collect
+ * @length: the length to collect
+ *
+ * Collect data with @offset and @length on all pads. This function
+ * is typically called in the getrange function of an element.
+ *
+ * This function is currently not implemented.
+ *
+ * Returns: #GstFlowReturn of the operation.
+ *
+ * MT safe.
+ */
+GstFlowReturn
+gst_collect_pads2_collect_range (GstCollectPads2 * pads, guint64 offset,
+ guint length)
+{
+ g_return_val_if_fail (pads != NULL, GST_FLOW_ERROR);
+ g_return_val_if_fail (GST_IS_COLLECT_PADS2 (pads), GST_FLOW_ERROR);
+
+ g_warning ("gst_collect_pads2_collect_range() is not implemented");
+
+ return GST_FLOW_NOT_SUPPORTED;
+}
+
+/*
+ * Must be called with STREAM_LOCK.
+ */
+static void
+gst_collect_pads2_set_flushing_unlocked (GstCollectPads2 * pads,
+ gboolean flushing)
+{
+ GSList *walk = NULL;
+
+ /* Update the pads flushing flag */
+ for (walk = pads->data; walk; walk = g_slist_next (walk)) {
+ GstCollectData2 *cdata = walk->data;
+
+ if (GST_IS_PAD (cdata->pad)) {
+ GST_OBJECT_LOCK (cdata->pad);
+ if (flushing)
+ GST_PAD_SET_FLUSHING (cdata->pad);
+ else
+ GST_PAD_UNSET_FLUSHING (cdata->pad);
+ if (flushing)
+ GST_COLLECT_PADS2_STATE_SET (cdata, GST_COLLECT_PADS2_STATE_FLUSHING);
+ else
+ GST_COLLECT_PADS2_STATE_UNSET (cdata, GST_COLLECT_PADS2_STATE_FLUSHING);
+ gst_collect_pads2_clear (pads, cdata);
+ GST_OBJECT_UNLOCK (cdata->pad);
+ }
+ }
+
+ /* inform _chain of changes */
+ GST_COLLECT_PADS2_EVT_BROADCAST (pads);
+}
+
+/**
+ * gst_collect_pads2_set_flushing:
+ * @pads: the collectspads to use
+ * @flushing: desired state of the pads
+ *
+ * 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.
+ *
+ * MT safe.
+ *
+ * Since: 0.10.7.
+ */
+void
+gst_collect_pads2_set_flushing (GstCollectPads2 * pads, gboolean flushing)
+{
+ g_return_if_fail (pads != NULL);
+ g_return_if_fail (GST_IS_COLLECT_PADS2 (pads));
+
+ /* NOTE since this eventually calls _pop, some (STREAM_)LOCK is needed here */
+ GST_COLLECT_PADS2_STREAM_LOCK (pads);
+ gst_collect_pads2_set_flushing_unlocked (pads, flushing);
+ GST_COLLECT_PADS2_STREAM_UNLOCK (pads);
+}
+
+/**
+ * gst_collect_pads2_start:
+ * @pads: the collectspads to use
+ *
+ * Starts the processing of data in the collect_pads2.
+ *
+ * MT safe.
+ */
+void
+gst_collect_pads2_start (GstCollectPads2 * pads)
+{
+ GSList *collected;
+
+ g_return_if_fail (pads != NULL);
+ g_return_if_fail (GST_IS_COLLECT_PADS2 (pads));
+
+ GST_DEBUG_OBJECT (pads, "starting collect pads");
+
+ /* make sure stop and collect cannot be called anymore */
+ GST_COLLECT_PADS2_STREAM_LOCK (pads);
+
+ /* make pads streamable */
+ GST_OBJECT_LOCK (pads);
+
+ /* loop over the master pad list and reset the segment */
+ collected = pads->pad_list;
+ for (; collected; collected = g_slist_next (collected)) {
+ GstCollectData2 *data;
+
+ data = collected->data;
+ gst_segment_init (&data->segment, GST_FORMAT_UNDEFINED);
+ }
+
+ gst_collect_pads2_set_flushing_unlocked (pads, FALSE);
+
+ /* Start collect pads */
+ pads->started = TRUE;
+ GST_OBJECT_UNLOCK (pads);
+ GST_COLLECT_PADS2_STREAM_UNLOCK (pads);
+}
+
+/**
+ * gst_collect_pads2_stop:
+ * @pads: the collectspads to use
+ *
+ * Stops the processing of data in the collect_pads2. this function
+ * will also unblock any blocking operations.
+ *
+ * MT safe.
+ */
+void
+gst_collect_pads2_stop (GstCollectPads2 * pads)
+{
+ GSList *collected;
+
+ g_return_if_fail (pads != NULL);
+ g_return_if_fail (GST_IS_COLLECT_PADS2 (pads));
+
+ GST_DEBUG_OBJECT (pads, "stopping collect pads");
+
+ /* make sure collect and start cannot be called anymore */
+ GST_COLLECT_PADS2_STREAM_LOCK (pads);
+
+ /* make pads not accept data anymore */
+ GST_OBJECT_LOCK (pads);
+ gst_collect_pads2_set_flushing_unlocked (pads, TRUE);
+
+ /* Stop collect pads */
+ pads->started = FALSE;
+ pads->eospads = 0;
+ pads->queuedpads = 0;
+
+ /* loop over the master pad list and flush buffers */
+ collected = pads->pad_list;
+ for (; collected; collected = g_slist_next (collected)) {
+ GstCollectData2 *data;
+ GstBuffer **buffer_p;
+
+ data = collected->data;
+ if (data->buffer) {
+ buffer_p = &data->buffer;
+ gst_buffer_replace (buffer_p, NULL);
+ data->pos = 0;
+ }
+ GST_COLLECT_PADS2_STATE_UNSET (data, GST_COLLECT_PADS2_STATE_EOS);
+ }
+
+ if (pads->earliest_data)
+ unref_data (pads->earliest_data);
+ pads->earliest_data = NULL;
+ pads->earliest_time = GST_CLOCK_TIME_NONE;
+
+ GST_OBJECT_UNLOCK (pads);
+ /* Wake them up so they can end the chain functions. */
+ GST_COLLECT_PADS2_EVT_BROADCAST (pads);
+
+ GST_COLLECT_PADS2_STREAM_UNLOCK (pads);
+}
+
+/**
+ * gst_collect_pads2_peek:
+ * @pads: the collectspads to peek
+ * @data: the data to use
+ *
+ * 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.
+ *
+ * Returns: The buffer in @data or NULL if no buffer is queued.
+ * should unref the buffer after usage.
+ *
+ * MT safe.
+ */
+GstBuffer *
+gst_collect_pads2_peek (GstCollectPads2 * pads, GstCollectData2 * data)
+{
+ GstBuffer *result;
+
+ g_return_val_if_fail (pads != NULL, NULL);
+ g_return_val_if_fail (GST_IS_COLLECT_PADS2 (pads), NULL);
+ g_return_val_if_fail (data != NULL, NULL);
+
+ if ((result = data->buffer))
+ gst_buffer_ref (result);
+
+ GST_DEBUG_OBJECT (pads, "Peeking at pad %s:%s: buffer=%p",
+ GST_DEBUG_PAD_NAME (data->pad), result);
+
+ return result;
+}
+
+/**
+ * gst_collect_pads2_pop:
+ * @pads: the collectspads to pop
+ * @data: the data to use
+ *
+ * Pop the buffer currently queued in @data. This function
+ * should be called with the @pads STREAM_LOCK held, such as in the callback
+ * handler.
+ *
+ * Returns: The buffer in @data or NULL if no buffer was queued.
+ * You should unref the buffer after usage.
+ *
+ * MT safe.
+ */
+GstBuffer *
+gst_collect_pads2_pop (GstCollectPads2 * pads, GstCollectData2 * data)
+{
+ GstBuffer *result;
+
+ g_return_val_if_fail (pads != NULL, NULL);
+ g_return_val_if_fail (GST_IS_COLLECT_PADS2 (pads), NULL);
+ g_return_val_if_fail (data != NULL, NULL);
+
+ if ((result = data->buffer)) {
+ data->buffer = NULL;
+ data->pos = 0;
+ /* one less pad with queued data now */
+ if (GST_COLLECT_PADS2_STATE_IS_SET (data, GST_COLLECT_PADS2_STATE_WAITING))
+ pads->queuedpads--;
+ }
+
+ GST_COLLECT_PADS2_EVT_BROADCAST (pads);
+
+ GST_DEBUG_OBJECT (pads, "Pop buffer on pad %s:%s: buffer=%p",
+ GST_DEBUG_PAD_NAME (data->pad), result);
+
+ return result;
+}
+
+/* pop and unref the currently queued buffer, should be called with STREAM_LOCK
+ * held */
+static void
+gst_collect_pads2_clear (GstCollectPads2 * pads, GstCollectData2 * data)
+{
+ GstBuffer *buf;
+
+ if ((buf = gst_collect_pads2_pop (pads, data)))
+ gst_buffer_unref (buf);
+}
+
+/**
+ * gst_collect_pads2_available:
+ * @pads: the collectspads to query
+ *
+ * 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.
+ *
+ * This function should be called with @pads STREAM_LOCK held, such as
+ * in the callback.
+ *
+ * Returns: The maximum number of bytes queued on all pads. This function
+ * returns 0 if a pad has no queued buffer.
+ *
+ * MT safe.
+ */
+/* we might pre-calculate this in some struct field,
+ * but would then have to maintain this in _chain and particularly _pop, etc,
+ * even if element is never interested in this information */
+guint
+gst_collect_pads2_available (GstCollectPads2 * pads)
+{
+ GSList *collected;
+ guint result = G_MAXUINT;
+
+ g_return_val_if_fail (pads != NULL, 0);
+ g_return_val_if_fail (GST_IS_COLLECT_PADS2 (pads), 0);
+
+ collected = pads->data;
+ for (; collected; collected = g_slist_next (collected)) {
+ GstCollectData2 *pdata;
+ GstBuffer *buffer;
+ gint size;
+
+ pdata = (GstCollectData2 *) collected->data;
+
+ /* ignore pad with EOS */
+ if (G_UNLIKELY (GST_COLLECT_PADS2_STATE_IS_SET (pdata,
+ GST_COLLECT_PADS2_STATE_EOS))) {
+ GST_DEBUG_OBJECT (pads, "pad %p is EOS", pdata);
+ continue;
+ }
+
+ /* an empty buffer without EOS is weird when we get here.. */
+ if (G_UNLIKELY ((buffer = pdata->buffer) == NULL)) {
+ GST_WARNING_OBJECT (pads, "pad %p has no buffer", pdata);
+ goto not_filled;
+ }
+
+ /* this is the size left of the buffer */
+ size = GST_BUFFER_SIZE (buffer) - pdata->pos;
+ GST_DEBUG_OBJECT (pads, "pad %p has %d bytes left", pdata, size);
+
+ /* need to return the min of all available data */
+ if (size < result)
+ result = size;
+ }
+ /* nothing changed, all must be EOS then, return 0 */
+ if (G_UNLIKELY (result == G_MAXUINT))
+ result = 0;
+
+ return result;
+
+not_filled:
+ {
+ return 0;
+ }
+}
+
+/**
+ * gst_collect_pads2_read:
+ * @pads: the collectspads to query
+ * @data: the data to use
+ * @bytes: a pointer to a byte array
+ * @size: the number of bytes to read
+ *
+ * Get a pointer in @bytes where @size bytes can be read from the
+ * given pad data.
+ *
+ * This function should be called with @pads STREAM_LOCK held, such as
+ * in the callback.
+ *
+ * Returns: The number of bytes available for consumption in the
+ * memory pointed to by @bytes. This can be less than @size and
+ * is 0 if the pad is end-of-stream.
+ *
+ * MT safe.
+ */
+guint
+gst_collect_pads2_read (GstCollectPads2 * pads, GstCollectData2 * data,
+ guint8 ** bytes, guint size)
+{
+ guint readsize;
+ GstBuffer *buffer;
+
+ g_return_val_if_fail (pads != NULL, 0);
+ g_return_val_if_fail (GST_IS_COLLECT_PADS2 (pads), 0);
+ g_return_val_if_fail (data != NULL, 0);
+ g_return_val_if_fail (bytes != NULL, 0);
+
+ /* no buffer, must be EOS */
+ if ((buffer = data->buffer) == NULL)
+ return 0;
+
+ readsize = MIN (size, GST_BUFFER_SIZE (buffer) - data->pos);
+
+ *bytes = GST_BUFFER_DATA (buffer) + data->pos;
+
+ return readsize;
+}
+
+/**
+ * gst_collect_pads2_flush:
+ * @pads: the collectspads to query
+ * @data: the data to use
+ * @size: the number of bytes to flush
+ *
+ * Flush @size bytes from the pad @data.
+ *
+ * This function should be called with @pads STREAM_LOCK held, such as
+ * in the callback.
+ *
+ * Returns: The number of bytes flushed This can be less than @size and
+ * is 0 if the pad was end-of-stream.
+ *
+ * MT safe.
+ */
+guint
+gst_collect_pads2_flush (GstCollectPads2 * pads, GstCollectData2 * data,
+ guint size)
+{
+ guint flushsize;
+ GstBuffer *buffer;
+
+ g_return_val_if_fail (pads != NULL, 0);
+ g_return_val_if_fail (GST_IS_COLLECT_PADS2 (pads), 0);
+ g_return_val_if_fail (data != NULL, 0);
+
+ /* no buffer, must be EOS */
+ if ((buffer = data->buffer) == NULL)
+ return 0;
+
+ /* this is what we can flush at max */
+ flushsize = MIN (size, GST_BUFFER_SIZE (buffer) - data->pos);
+
+ data->pos += size;
+
+ if (data->pos >= GST_BUFFER_SIZE (buffer))
+ /* _clear will also reset data->pos to 0 */
+ gst_collect_pads2_clear (pads, data);
+
+ return flushsize;
+}
+
+/**
+ * gst_collect_pads2_read_buffer:
+ * @pads: the collectspads to query
+ * @data: the data to use
+ * @size: the number of bytes to read
+ *
+ * Get a subbuffer of @size bytes from the given pad @data.
+ *
+ * This function should be called with @pads STREAM_LOCK held, such as in the
+ * callback.
+ *
+ * Since: 0.10.18
+ *
+ * Returns: A sub buffer. The size of the buffer can be less that requested.
+ * A return of NULL signals that the pad is end-of-stream.
+ * Unref the buffer after use.
+ *
+ * MT safe.
+ */
+GstBuffer *
+gst_collect_pads2_read_buffer (GstCollectPads2 * pads, GstCollectData2 * data,
+ guint size)
+{
+ guint readsize;
+ GstBuffer *buffer;
+
+ g_return_val_if_fail (pads != NULL, NULL);
+ g_return_val_if_fail (GST_IS_COLLECT_PADS2 (pads), NULL);
+ g_return_val_if_fail (data != NULL, NULL);
+
+ /* no buffer, must be EOS */
+ if ((buffer = data->buffer) == NULL)
+ return NULL;
+
+ readsize = MIN (size, GST_BUFFER_SIZE (buffer) - data->pos);
+
+ return gst_buffer_create_sub (buffer, data->pos, readsize);
+}
+
+/**
+ * gst_collect_pads2_take_buffer:
+ * @pads: the collectspads to query
+ * @data: the data to use
+ * @size: the number of bytes to read
+ *
+ * Get a subbuffer of @size bytes from the given pad @data. Flushes the amount
+ * of read bytes.
+ *
+ * This function should be called with @pads STREAM_LOCK held, such as in the
+ * callback.
+ *
+ * Since: 0.10.18
+ *
+ * Returns: A sub buffer. The size of the buffer can be less that requested.
+ * A return of NULL signals that the pad is end-of-stream.
+ * Unref the buffer after use.
+ *
+ * MT safe.
+ */
+GstBuffer *
+gst_collect_pads2_take_buffer (GstCollectPads2 * pads, GstCollectData2 * data,
+ guint size)
+{
+ GstBuffer *buffer = gst_collect_pads2_read_buffer (pads, data, size);
+
+ if (buffer) {
+ gst_collect_pads2_flush (pads, data, GST_BUFFER_SIZE (buffer));
+ }
+ return buffer;
+}
+
+/**
+ * gst_collect_pads2_set_waiting:
+ * @pads: the collectspads
+ * @data: the data to use
+ * @waiting: boolean indicating whether this pad should operate
+ * in waiting or non-waiting mode
+ *
+ * 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.
+ *
+ * This function should be called with @pads STREAM_LOCK held, such as
+ * in the callback.
+ *
+ * MT safe.
+ */
+void
+gst_collect_pads2_set_waiting (GstCollectPads2 * pads, GstCollectData2 * data,
+ gboolean waiting)
+{
+ g_return_if_fail (pads != NULL);
+ g_return_if_fail (GST_IS_COLLECT_PADS2 (pads));
+ g_return_if_fail (data != NULL);
+
+ GST_DEBUG_OBJECT (pads, "Setting pad %s to waiting %d, locked %d",
+ GST_PAD_NAME (data->pad), waiting,
+ GST_COLLECT_PADS2_STATE_IS_SET (data, GST_COLLECT_PADS2_STATE_LOCKED));
+
+ /* Do something only on a change and if not locked */
+ if (!GST_COLLECT_PADS2_STATE_IS_SET (data, GST_COLLECT_PADS2_STATE_LOCKED) &&
+ (GST_COLLECT_PADS2_STATE_IS_SET (data, GST_COLLECT_PADS2_STATE_WAITING) !=
+ ! !waiting)) {
+ /* Set waiting state for this pad */
+ if (waiting)
+ GST_COLLECT_PADS2_STATE_SET (data, GST_COLLECT_PADS2_STATE_WAITING);
+ else
+ GST_COLLECT_PADS2_STATE_UNSET (data, GST_COLLECT_PADS2_STATE_WAITING);
+ /* Update number of queued pads if needed */
+ if (!data->buffer &&
+ !GST_COLLECT_PADS2_STATE_IS_SET (data, GST_COLLECT_PADS2_STATE_EOS)) {
+ if (waiting)
+ pads->queuedpads--;
+ else
+ pads->queuedpads++;
+ }
+
+ /* signal waiters because something changed */
+ GST_COLLECT_PADS2_EVT_BROADCAST (pads);
+ }
+}
+
+/* see if pads were added or removed and update our stats. Any pad
+ * added after releasing the LOCK will get collected in the next
+ * round.
+ *
+ * We can do a quick check by checking the cookies, that get changed
+ * whenever the pad list is updated.
+ *
+ * Must be called with STREAM_LOCK.
+ */
+static void
+gst_collect_pads2_check_pads (GstCollectPads2 * pads)
+{
+ /* the master list and cookie are protected with LOCK */
+ GST_OBJECT_LOCK (pads);
+ if (G_UNLIKELY (pads->pad_cookie != pads->cookie)) {
+ GSList *collected;
+
+ /* clear list and stats */
+ g_slist_foreach (pads->data, (GFunc) unref_data, NULL);
+ g_slist_free (pads->data);
+ pads->data = NULL;
+ pads->numpads = 0;
+ pads->queuedpads = 0;
+ pads->eospads = 0;
+ if (pads->earliest_data)
+ unref_data (pads->earliest_data);
+ pads->earliest_data = NULL;
+ pads->earliest_time = GST_CLOCK_TIME_NONE;
+
+ /* loop over the master pad list */
+ collected = pads->pad_list;
+ for (; collected; collected = g_slist_next (collected)) {
+ GstCollectData2 *data;
+
+ /* update the stats */
+ pads->numpads++;
+ data = collected->data;
+ if (GST_COLLECT_PADS2_STATE_IS_SET (data, GST_COLLECT_PADS2_STATE_EOS))
+ pads->eospads++;
+ else if (data->buffer || !GST_COLLECT_PADS2_STATE_IS_SET (data,
+ GST_COLLECT_PADS2_STATE_WAITING))
+ pads->queuedpads++;
+
+ /* add to the list of pads to collect */
+ ref_data (data);
+ /* preserve order of adding/requesting pads */
+ pads->data = g_slist_append (pads->data, data);
+ }
+ /* and update the cookie */
+ pads->cookie = pads->pad_cookie;
+ }
+ GST_OBJECT_UNLOCK (pads);
+}
+
+/* checks if all the pads are collected and call the collectfunction
+ *
+ * Should be called with STREAM_LOCK.
+ *
+ * Returns: The #GstFlowReturn of collection.
+ */
+static GstFlowReturn
+gst_collect_pads2_check_collected (GstCollectPads2 * pads)
+{
+ GstFlowReturn flow_ret = GST_FLOW_OK;
+ GstCollectPads2Function func;
+ gpointer user_data;
+
+ g_return_val_if_fail (GST_IS_COLLECT_PADS2 (pads), GST_FLOW_ERROR);
+
+ GST_OBJECT_LOCK (pads);
+ func = pads->func;
+ user_data = pads->user_data;
+ GST_OBJECT_UNLOCK (pads);
+
+ g_return_val_if_fail (pads->func != NULL, GST_FLOW_NOT_SUPPORTED);
+
+ /* check for new pads, update stats etc.. */
+ gst_collect_pads2_check_pads (pads);
+
+ if (G_UNLIKELY (pads->eospads == pads->numpads)) {
+ /* If all our pads are EOS just collect once to let the element
+ * do its final EOS handling. */
+ GST_DEBUG_OBJECT (pads, "All active pads (%d) are EOS, calling %s",
+ pads->numpads, GST_DEBUG_FUNCPTR_NAME (func));
+
+ flow_ret = func (pads, user_data);
+ } else {
+ gboolean collected = FALSE;
+
+ /* We call the collected function as long as our condition matches. */
+ while (((pads->queuedpads + pads->eospads) >= pads->numpads)) {
+ GST_DEBUG_OBJECT (pads, "All active pads (%d + %d >= %d) have data, "
+ "calling %s", pads->queuedpads, pads->eospads, pads->numpads,
+ GST_DEBUG_FUNCPTR_NAME (func));
+
+ flow_ret = func (pads, user_data);
+ collected = TRUE;
+
+ /* break on error */
+ if (flow_ret != GST_FLOW_OK)
+ break;
+ /* Don't keep looping after telling the element EOS or flushing */
+ if (pads->queuedpads == 0)
+ break;
+ }
+ if (!collected)
+ GST_DEBUG_OBJECT (pads, "Not all active pads (%d) have data, continuing",
+ pads->numpads);
+ }
+ return flow_ret;
+}
+
+
+/* General overview:
+ * - only pad with a buffer can determine earliest_data (and earliest_time)
+ * - only segment info determines (non-)waiting state
+ * - ? perhaps use _stream_time for comparison
+ * (which muxers might have use as well ?)
+ */
+
+/*
+ * Function to recalculate the waiting state of all pads.
+ *
+ * Must be called with STREAM_LOCK.
+ *
+ * Returns TRUE if a pad was set to waiting
+ * (from non-waiting state).
+ */
+static gboolean
+gst_collect_pads2_recalculate_waiting (GstCollectPads2 * pads)
+{
+ GSList *collected;
+ gboolean result = FALSE;
+
+ /* If earliest time is not known, there is nothing to do. */
+ if (pads->earliest_data == NULL)
+ return FALSE;
+
+ for (collected = pads->data; collected; collected = g_slist_next (collected)) {
+ GstCollectData2 *data = (GstCollectData2 *) collected->data;
+ int cmp_res;
+
+ /* check if pad has a segment */
+ if (data->segment.format == GST_FORMAT_UNDEFINED)
+ continue;
+
+ /* check segment format */
+ if (data->segment.format != GST_FORMAT_TIME) {
+ GST_ERROR_OBJECT (pads, "GstCollectPads2 can handle only time segments.");
+ continue;
+ }
+
+ /* check if the waiting state should be changed */
+ cmp_res = pads->compare_func (pads, data, data->segment.start,
+ pads->earliest_data, pads->earliest_time, pads->compare_user_data);
+ if (cmp_res > 0)
+ /* stop waiting */
+ gst_collect_pads2_set_waiting (pads, data, FALSE);
+ else {
+ if (!GST_COLLECT_PADS2_STATE_IS_SET (data,
+ GST_COLLECT_PADS2_STATE_WAITING)) {
+ /* start waiting */
+ gst_collect_pads2_set_waiting (pads, data, TRUE);
+ result = TRUE;
+ }
+ }
+ }
+
+ return result;
+}
+
+/**
+ * gst_collect_pads2_find_best_pad:
+ * @pads: the collectpads to use
+ * @data: returns the collectdata for earliest data
+ * @time: returns the earliest available buffertime
+ *
+ * Find the oldest/best pad, i.e. pad holding the oldest buffer and
+ * and return the corresponding #GstCollectData2 and buffertime.
+ *
+ * This function should be called with STREAM_LOCK held,
+ * such as in the callback.
+ */
+static void
+gst_collect_pads2_find_best_pad (GstCollectPads2 * pads,
+ GstCollectData2 ** data, GstClockTime * time)
+{
+ GSList *collected;
+ GstCollectData2 *best = NULL;
+ GstClockTime best_time = GST_CLOCK_TIME_NONE;
+
+ g_return_if_fail (data != NULL);
+ g_return_if_fail (time != NULL);
+
+ for (collected = pads->data; collected; collected = g_slist_next (collected)) {
+ GstBuffer *buffer;
+ GstCollectData2 *data = (GstCollectData2 *) collected->data;
+ GstClockTime timestamp;
+
+ buffer = gst_collect_pads2_peek (pads, data);
+ /* if we have a buffer check if it is better then the current best one */
+ if (buffer != NULL) {
+ timestamp = GST_BUFFER_TIMESTAMP (buffer);
+ gst_buffer_unref (buffer);
+ if (best == NULL || pads->compare_func (pads, data, timestamp,
+ best, best_time, pads->compare_user_data) < 0) {
+ best = data;
+ best_time = timestamp;
+ }
+ }
+ }
+
+ /* set earliest time */
+ *data = best;
+ *time = best_time;
+
+ GST_DEBUG_OBJECT (pads, "best pad %s, best time %" GST_TIME_FORMAT,
+ best ? GST_PAD_NAME (((GstCollectData2 *) best)->pad) : "(nil)",
+ GST_TIME_ARGS (best_time));
+}
+
+/*
+ * Function to recalculate earliest_data and earliest_timestamp. This also calls
+ * gst_collect_pads2_recalculate_waiting
+ *
+ * Must be called with STREAM_LOCK.
+ */
+static gboolean
+gst_collect_pads2_recalculate_full (GstCollectPads2 * pads)
+{
+ if (pads->earliest_data)
+ unref_data (pads->earliest_data);
+ gst_collect_pads2_find_best_pad (pads, &pads->earliest_data,
+ &pads->earliest_time);
+ if (pads->earliest_data)
+ ref_data (pads->earliest_data);
+ return gst_collect_pads2_recalculate_waiting (pads);
+}
+
+/*
+ * Default collect callback triggered when #GstCollectPads2 gathered all data.
+ *
+ * Called with STREAM_LOCK.
+ */
+static GstFlowReturn
+gst_collect_pads2_default_collected (GstCollectPads2 * pads, gpointer user_data)
+{
+ GstCollectData2 *best = NULL;
+ GstBuffer *buffer;
+ GstFlowReturn ret = GST_FLOW_OK;
+ GstCollectPads2BufferFunction func;
+ gpointer buffer_user_data;
+
+ g_return_val_if_fail (GST_IS_COLLECT_PADS2 (pads), GST_FLOW_ERROR);
+
+ GST_OBJECT_LOCK (pads);
+ func = pads->buffer_func;
+ buffer_user_data = pads->buffer_user_data;
+ GST_OBJECT_UNLOCK (pads);
+
+ g_return_val_if_fail (func != NULL, GST_FLOW_NOT_SUPPORTED);
+
+ /* Find the oldest pad at all cost */
+ if (gst_collect_pads2_recalculate_full (pads)) {
+ /* waiting was switched on,
+ * so give another thread a chance to deliver a possibly
+ * older buffer; don't charge on yet with the current oldest */
+ ret = GST_FLOW_OK;
+ }
+
+ best = pads->earliest_data;
+
+ /* No data collected means EOS. */
+ if (G_UNLIKELY (best == NULL)) {
+ ret = func (pads, best, NULL, buffer_user_data);
+ if (ret == GST_FLOW_OK)
+ ret = GST_FLOW_UNEXPECTED;
+ goto done;
+ }
+
+ /* make sure that the pad we take a buffer from is waiting;
+ * otherwise popping a buffer will seem not to have happened
+ * and collectpads can get into a busy loop */
+ gst_collect_pads2_set_waiting (pads, best, TRUE);
+
+ /* Send buffer */
+ buffer = gst_collect_pads2_pop (pads, best);
+ ret = func (pads, best, buffer, buffer_user_data);
+
+done:
+ return ret;
+}
+
+/*
+ * Default timestamp compare function.
+ */
+static gint
+gst_collect_pads2_default_compare_func (GstCollectPads2 * pads,
+ GstCollectData2 * data1, GstClockTime timestamp1,
+ GstCollectData2 * data2, GstClockTime timestamp2, gpointer user_data)
+{
+
+ GST_LOG_OBJECT (pads, "comparing %" GST_TIME_FORMAT
+ " and %" GST_TIME_FORMAT, GST_TIME_ARGS (timestamp1),
+ GST_TIME_ARGS (timestamp2));
+ /* non-valid timestamps go first as they are probably headers or so */
+ if (G_UNLIKELY (!GST_CLOCK_TIME_IS_VALID (timestamp1)))
+ return GST_CLOCK_TIME_IS_VALID (timestamp2) ? -1 : 0;
+
+ if (G_UNLIKELY (!GST_CLOCK_TIME_IS_VALID (timestamp2)))
+ return 1;
+
+ /* compare timestamp */
+ if (timestamp1 < timestamp2)
+ return -1;
+
+ if (timestamp1 > timestamp2)
+ return 1;
+
+ return 0;
+}
+
+static gboolean
+gst_collect_pads2_event (GstPad * pad, GstEvent * event)
+{
+ gboolean res = FALSE, need_unlock = FALSE;
+ GstCollectData2 *data;
+ GstCollectPads2 *pads;
+ GstCollectPads2EventFunction event_func;
+ GstCollectPads2BufferFunction buffer_func;
+ gpointer event_user_data;
+
+ /* some magic to get the managing collect_pads2 */
+ GST_OBJECT_LOCK (pad);
+ data = (GstCollectData2 *) gst_pad_get_element_private (pad);
+ if (G_UNLIKELY (data == NULL))
+ goto pad_removed;
+ ref_data (data);
+ GST_OBJECT_UNLOCK (pad);
+
+ res = FALSE;
+
+ pads = data->collect;
+
+ GST_DEBUG ("Got %s event on pad %s:%s", GST_EVENT_TYPE_NAME (event),
+ GST_DEBUG_PAD_NAME (data->pad));
+
+ GST_OBJECT_LOCK (pads);
+ event_func = pads->event_func;
+ event_user_data = pads->event_user_data;
+ buffer_func = pads->buffer_func;
+ GST_OBJECT_UNLOCK (pads);
+
+ switch (GST_EVENT_TYPE (event)) {
+ case GST_EVENT_FLUSH_START:
+ {
+ /* forward event to unblock check_collected */
+ if (event_func)
+ res = event_func (pads, data, event, event_user_data);
+ if (!res)
+ res = gst_pad_event_default (pad, event);
+
+ /* now unblock the chain function.
+ * no cond per pad, so they all unblock,
+ * non-flushing block again */
+ GST_COLLECT_PADS2_STREAM_LOCK (pads);
+ GST_COLLECT_PADS2_STATE_SET (data, GST_COLLECT_PADS2_STATE_FLUSHING);
+ gst_collect_pads2_clear (pads, data);
+
+ /* cater for possible default muxing functionality */
+ if (buffer_func) {
+ /* restore to initial state */
+ gst_collect_pads2_set_waiting (pads, data, TRUE);
+ /* if the current pad is affected, reset state, recalculate later */
+ if (pads->earliest_data == data) {
+ unref_data (data);
+ pads->earliest_data = NULL;
+ pads->earliest_time = GST_CLOCK_TIME_NONE;
+ }
+ }
+
+ GST_COLLECT_PADS2_STREAM_UNLOCK (pads);
+
+ /* event already cleaned up by forwarding */
+ res = TRUE;
+ goto done;
+ }
+ case GST_EVENT_FLUSH_STOP:
+ {
+ /* flush the 1 buffer queue */
+ GST_COLLECT_PADS2_STREAM_LOCK (pads);
+ GST_COLLECT_PADS2_STATE_UNSET (data, GST_COLLECT_PADS2_STATE_FLUSHING);
+ gst_collect_pads2_clear (pads, data);
+ /* we need new segment info after the flush */
+ gst_segment_init (&data->segment, GST_FORMAT_UNDEFINED);
+ GST_COLLECT_PADS2_STATE_UNSET (data, GST_COLLECT_PADS2_STATE_NEW_SEGMENT);
+ /* if the pad was EOS, remove the EOS flag and
+ * decrement the number of eospads */
+ if (G_UNLIKELY (GST_COLLECT_PADS2_STATE_IS_SET (data,
+ GST_COLLECT_PADS2_STATE_EOS))) {
+ if (!GST_COLLECT_PADS2_STATE_IS_SET (data,
+ GST_COLLECT_PADS2_STATE_WAITING))
+ pads->queuedpads++;
+ pads->eospads--;
+ GST_COLLECT_PADS2_STATE_UNSET (data, GST_COLLECT_PADS2_STATE_EOS);
+ }
+ GST_COLLECT_PADS2_STREAM_UNLOCK (pads);
+
+ /* forward event */
+ goto forward_or_default;
+ }
+ case GST_EVENT_EOS:
+ {
+ GST_COLLECT_PADS2_STREAM_LOCK (pads);
+ /* if the pad was not EOS, make it EOS and so we
+ * have one more eospad */
+ if (G_LIKELY (!GST_COLLECT_PADS2_STATE_IS_SET (data,
+ GST_COLLECT_PADS2_STATE_EOS))) {
+ GST_COLLECT_PADS2_STATE_SET (data, GST_COLLECT_PADS2_STATE_EOS);
+ if (!GST_COLLECT_PADS2_STATE_IS_SET (data,
+ GST_COLLECT_PADS2_STATE_WAITING))
+ pads->queuedpads--;
+ pads->eospads++;
+ }
+ /* check if we need collecting anything, we ignore the result. */
+ gst_collect_pads2_check_collected (pads);
+ GST_COLLECT_PADS2_STREAM_UNLOCK (pads);
+
+ goto forward_or_eat;
+ }
+ case GST_EVENT_NEWSEGMENT:
+ {
+ gint64 start, stop, time;
+ gdouble rate, arate;
+ GstFormat format;
+ gboolean update;
+ gint cmp_res;
+
+ GST_COLLECT_PADS2_STREAM_LOCK (pads);
+
+ gst_event_parse_new_segment_full (event, &update, &rate, &arate, &format,
+ &start, &stop, &time);
+
+ GST_DEBUG_OBJECT (data->pad, "got newsegment, start %" GST_TIME_FORMAT
+ ", stop %" GST_TIME_FORMAT, GST_TIME_ARGS (start),
+ GST_TIME_ARGS (stop));
+
+ gst_segment_set_newsegment_full (&data->segment, update, rate, arate,
+ format, start, stop, time);
+
+ GST_COLLECT_PADS2_STATE_SET (data, GST_COLLECT_PADS2_STATE_NEW_SEGMENT);
+
+ /* default muxing functionality */
+ if (!buffer_func)
+ goto newsegment_done;
+
+ /* default collection can not handle other segment formats than time */
+ if (format != GST_FORMAT_TIME) {
+ GST_ERROR_OBJECT (pads, "GstCollectPads2 default collecting "
+ "can only handle time segments.");
+ goto newsegment_done;
+ }
+
+ /* If oldest time is not known, or current pad got newsegment;
+ * recalculate the state */
+ if (!pads->earliest_data || pads->earliest_data == data) {
+ gst_collect_pads2_recalculate_full (pads);
+ goto newsegment_done;
+ }
+
+ /* Check if the waiting state of the pad should change. */
+ cmp_res = pads->compare_func (pads, data, start, pads->earliest_data,
+ pads->earliest_time, pads->compare_user_data);
+
+ if (cmp_res > 0)
+ /* Stop waiting */
+ gst_collect_pads2_set_waiting (pads, data, FALSE);
+
+ newsegment_done:
+ GST_COLLECT_PADS2_STREAM_UNLOCK (pads);
+ /* we must not forward this event since multiple segments will be
+ * accumulated and this is certainly not what we want. */
+ goto forward_or_eat;
+ }
+ default:
+ /* forward other events */
+ goto forward_or_default;
+ }
+
+forward_or_default:
+ if (GST_EVENT_IS_SERIALIZED (event)) {
+ GST_COLLECT_PADS2_STREAM_LOCK (pads);
+ need_unlock = TRUE;
+ }
+ if (event_func)
+ res = event_func (pads, data, event, event_user_data);
+ if (!res)
+ res = gst_pad_event_default (pad, event);
+ if (need_unlock)
+ GST_COLLECT_PADS2_STREAM_UNLOCK (pads);
+ goto done;
+
+forward_or_eat:
+ if (GST_EVENT_IS_SERIALIZED (event)) {
+ GST_COLLECT_PADS2_STREAM_LOCK (pads);
+ need_unlock = TRUE;
+ }
+ if (event_func)
+ res = event_func (pads, data, event, event_user_data);
+ if (!res) {
+ gst_event_unref (event);
+ res = TRUE;
+ }
+ if (need_unlock)
+ GST_COLLECT_PADS2_STREAM_UNLOCK (pads);
+ goto done;
+
+done:
+ unref_data (data);
+ return res;
+
+ /* ERRORS */
+pad_removed:
+ {
+ GST_DEBUG ("%s got removed from collectpads", GST_OBJECT_NAME (pad));
+ GST_OBJECT_UNLOCK (pad);
+ return FALSE;
+ }
+}
+
+/* For each buffer we receive we check if our collected condition is reached
+ * and if so we call the collected function. When this is done we check if
+ * data has been unqueued. If data is still queued we wait holding the stream
+ * lock to make sure no EOS event can happen while we are ready to be
+ * collected
+ */
+static GstFlowReturn
+gst_collect_pads2_chain (GstPad * pad, GstBuffer * buffer)
+{
+ GstCollectData2 *data;
+ GstCollectPads2 *pads;
+ guint64 size;
+ GstFlowReturn ret;
+ GstBuffer **buffer_p;
+ guint32 cookie;
+ GstCollectPads2BufferFunction prepare_buffer_func;
+ gpointer prepare_buffer_user_data;
+
+ GST_DEBUG ("Got buffer for pad %s:%s", GST_DEBUG_PAD_NAME (pad));
+
+ /* some magic to get the managing collect_pads2 */
+ GST_OBJECT_LOCK (pad);
+ data = (GstCollectData2 *) gst_pad_get_element_private (pad);
+ if (G_UNLIKELY (data == NULL))
+ goto no_data;
+ ref_data (data);
+ GST_OBJECT_UNLOCK (pad);
+
+ pads = data->collect;
+ GST_OBJECT_LOCK (pads);
+ prepare_buffer_func = pads->prepare_buffer_func;
+ prepare_buffer_user_data = pads->prepare_buffer_user_data;
+ GST_OBJECT_UNLOCK (pads);
+
+ size = GST_BUFFER_SIZE (buffer);
+
+ GST_COLLECT_PADS2_STREAM_LOCK (pads);
+ /* if not started, bail out */
+ if (G_UNLIKELY (!pads->started))
+ goto not_started;
+ /* check if this pad is flushing */
+ if (G_UNLIKELY (GST_COLLECT_PADS2_STATE_IS_SET (data,
+ GST_COLLECT_PADS2_STATE_FLUSHING)))
+ goto flushing;
+ /* pad was EOS, we can refuse this data */
+ if (G_UNLIKELY (GST_COLLECT_PADS2_STATE_IS_SET (data,
+ GST_COLLECT_PADS2_STATE_EOS)))
+ goto unexpected;
+
+ GST_DEBUG_OBJECT (pads, "Queuing buffer %p for pad %s:%s", buffer,
+ GST_DEBUG_PAD_NAME (pad));
+
+ if (prepare_buffer_func) {
+ ret = prepare_buffer_func (pads, data, buffer, prepare_buffer_user_data);
+ if (ret == GST_COLLECT_PADS2_FLOW_DROP) {
+ GST_DEBUG_OBJECT (pads, "Dropping buffer as requested");
+ ret = GST_FLOW_OK;
+ goto unlock_done;
+ } else if (ret == GST_FLOW_UNEXPECTED) {
+ goto unexpected;
+ } else if (ret != GST_FLOW_OK) {
+ goto error;
+ }
+ }
+
+ /* One more pad has data queued */
+ if (GST_COLLECT_PADS2_STATE_IS_SET (data, GST_COLLECT_PADS2_STATE_WAITING))
+ pads->queuedpads++;
+ buffer_p = &data->buffer;
+ gst_buffer_replace (buffer_p, buffer);
+
+ /* update segment last position if in TIME */
+ if (G_LIKELY (data->segment.format == GST_FORMAT_TIME)) {
+ GstClockTime timestamp = GST_BUFFER_TIMESTAMP (buffer);
+
+ if (GST_CLOCK_TIME_IS_VALID (timestamp))
+ gst_segment_set_last_stop (&data->segment, GST_FORMAT_TIME, timestamp);
+ }
+
+ /* While we have data queued on this pad try to collect stuff */
+ do {
+ /* Check if our collected condition is matched and call the collected
+ * function if it is */
+ ret = gst_collect_pads2_check_collected (pads);
+ /* when an error occurs, we want to report this back to the caller ASAP
+ * without having to block if the buffer was not popped */
+ if (G_UNLIKELY (ret != GST_FLOW_OK))
+ goto error;
+
+ /* data was consumed, we can exit and accept new data */
+ if (data->buffer == NULL)
+ break;
+
+ /* Having the _INIT here means we don't care about any broadcast up to here
+ * (most of which occur with STREAM_LOCK held, so could not have happened
+ * anyway). We do care about e.g. a remove initiated broadcast as of this
+ * point. Putting it here also makes this thread ignores any evt it raised
+ * itself (as is a usual WAIT semantic).
+ */
+ GST_COLLECT_PADS2_EVT_INIT (cookie);
+
+ /* pad could be removed and re-added */
+ unref_data (data);
+ GST_OBJECT_LOCK (pad);
+ if (G_UNLIKELY ((data = gst_pad_get_element_private (pad)) == NULL))
+ goto pad_removed;
+ ref_data (data);
+ GST_OBJECT_UNLOCK (pad);
+
+ GST_DEBUG_OBJECT (pads, "Pad %s:%s has a buffer queued, waiting",
+ GST_DEBUG_PAD_NAME (pad));
+
+ /* wait to be collected, this must happen from another thread triggered
+ * by the _chain function of another pad. We release the lock so we
+ * can get stopped or flushed as well. We can however not get EOS
+ * because we still hold the STREAM_LOCK.
+ */
+ GST_COLLECT_PADS2_STREAM_UNLOCK (pads);
+ GST_COLLECT_PADS2_EVT_WAIT (pads, cookie);
+ GST_COLLECT_PADS2_STREAM_LOCK (pads);
+
+ GST_DEBUG_OBJECT (pads, "Pad %s:%s resuming", GST_DEBUG_PAD_NAME (pad));
+
+ /* after a signal, we could be stopped */
+ if (G_UNLIKELY (!pads->started))
+ goto not_started;
+ /* check if this pad is flushing */
+ if (G_UNLIKELY (GST_COLLECT_PADS2_STATE_IS_SET (data,
+ GST_COLLECT_PADS2_STATE_FLUSHING)))
+ goto flushing;
+ }
+ while (data->buffer != NULL);
+
+unlock_done:
+ GST_COLLECT_PADS2_STREAM_UNLOCK (pads);
+ unref_data (data);
+ gst_buffer_unref (buffer);
+ return ret;
+
+pad_removed:
+ {
+ GST_WARNING ("%s got removed from collectpads", GST_OBJECT_NAME (pad));
+ GST_OBJECT_UNLOCK (pad);
+ ret = GST_FLOW_NOT_LINKED;
+ goto unlock_done;
+ }
+ /* ERRORS */
+no_data:
+ {
+ GST_DEBUG ("%s got removed from collectpads", GST_OBJECT_NAME (pad));
+ GST_OBJECT_UNLOCK (pad);
+ gst_buffer_unref (buffer);
+ return GST_FLOW_NOT_LINKED;
+ }
+not_started:
+ {
+ GST_DEBUG ("not started");
+ gst_collect_pads2_clear (pads, data);
+ ret = GST_FLOW_WRONG_STATE;
+ goto unlock_done;
+ }
+flushing:
+ {
+ GST_DEBUG ("pad %s:%s is flushing", GST_DEBUG_PAD_NAME (pad));
+ gst_collect_pads2_clear (pads, data);
+ ret = GST_FLOW_WRONG_STATE;
+ goto unlock_done;
+ }
+unexpected:
+ {
+ /* we should not post an error for this, just inform upstream that
+ * we don't expect anything anymore */
+ GST_DEBUG ("pad %s:%s is eos", GST_DEBUG_PAD_NAME (pad));
+ ret = GST_FLOW_UNEXPECTED;
+ goto unlock_done;
+ }
+error:
+ {
+ /* we print the error, the element should post a reasonable error
+ * message for fatal errors */
+ GST_DEBUG ("collect failed, reason %d (%s)", ret, gst_flow_get_name (ret));
+ gst_collect_pads2_clear (pads, data);
+ goto unlock_done;
+ }
+}
--- /dev/null
+/* GStreamer
+ * Copyright (C) 2005 Wim Taymans <wim@fluendo.com>
+ * Copyright (C) 2008 Mark Nauwelaerts <mnauw@users.sourceforge.net>
+ *
+ * gstcollectpads2.h:
+ *
+ * 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.
+ */
+
+#ifndef __GST_COLLECT_PADS2_H__
+#define __GST_COLLECT_PADS2_H__
+
+#include <gst/gst.h>
+
+G_BEGIN_DECLS
+
+#define GST_TYPE_COLLECT_PADS2 (gst_collect_pads2_get_type())
+#define GST_COLLECT_PADS2(obj) (G_TYPE_CHECK_INSTANCE_CAST((obj),GST_TYPE_COLLECT_PADS2,GstCollectPads2))
+#define GST_COLLECT_PADS2_CLASS(klass) (G_TYPE_CHECK_CLASS_CAST((klass),GST_TYPE_COLLECT_PADS2,GstCollectPads2Class))
+#define GST_COLLECT_PADS2_GET_CLASS(obj) (G_TYPE_INSTANCE_GET_CLASS ((obj),GST_TYPE_COLLECT_PADS2,GstCollectPads2Class))
+#define GST_IS_COLLECT_PADS2(obj) (G_TYPE_CHECK_INSTANCE_TYPE((obj),GST_TYPE_COLLECT_PADS2))
+#define GST_IS_COLLECT_PADS2_CLASS(klass) (G_TYPE_CHECK_CLASS_TYPE((klass),GST_TYPE_COLLECT_PADS2))
+
+typedef struct _GstCollectData2 GstCollectData2;
+typedef struct _GstCollectPads2 GstCollectPads2;
+typedef struct _GstCollectPads2Class GstCollectPads2Class;
+
+/**
+ * GstCollectData2DestroyNotify:
+ * @data: the #GstCollectData2 that will be freed
+ *
+ * A function that will be called when the #GstCollectData2 will be freed.
+ * It is passed the pointer to the structure and should free any custom
+ * memory and resources allocated for it.
+ *
+ * Since: 0.10.12
+ */
+typedef void (*GstCollectData2DestroyNotify) (GstCollectData2 *data);
+
+/**
+ * GstCollectPads2StateFlags:
+ * @GST_COLLECT_PADS2_STATE_EOS: Set if collectdata's pad is EOS.
+ * @GST_COLLECT_PADS2_STATE_FLUSHING: Set if collectdata's pad is flushing.
+ * @GST_COLLECT_PADS2_STATE_NEW_SEGMENT: Set if collectdata's pad received a
+ * new_segment event.
+ * @GST_COLLECT_PADS2_STATE_WAITING: Set if collectdata's pad must be waited
+ * for when collecting.
+ * @GST_COLLECT_PADS2_STATE_LOCKED: Set collectdata's pad WAITING state must
+ * not be changed.
+ * #GstCollectPads2StateFlags indicate private state of a collectdata('s pad).
+ */
+typedef enum {
+ GST_COLLECT_PADS2_STATE_EOS = 1 << 0,
+ GST_COLLECT_PADS2_STATE_FLUSHING = 1 << 1,
+ GST_COLLECT_PADS2_STATE_NEW_SEGMENT = 1 << 2,
+ GST_COLLECT_PADS2_STATE_WAITING = 1 << 3,
+ GST_COLLECT_PADS2_STATE_LOCKED = 1 << 4
+} GstCollectPads2StateFlags;
+
+/**
+ * GST_COLLECT_PADS2_STATE:
+ * @data: a #GstCollectData2.
+ *
+ * A flags word containing #GstCollectPads2StateFlags flags set
+ * on this collected pad.
+ */
+#define GST_COLLECT_PADS2_STATE(data) (((GstCollectData2 *) data)->state)
+/**
+ * GST_COLLECT_PADS2_STATE_IS_SET:
+ * @data: a #GstCollectData2.
+ * @flag: the #GstCollectPads2StateFlags to check.
+ *
+ * Gives the status of a specific flag on a collected pad.
+ */
+#define GST_COLLECT_PADS2_STATE_IS_SET(data,flag) !!(GST_COLLECT_PADS2_STATE (data) & flag)
+/**
+ * GST_COLLECT_PADS2_STATE_SET:
+ * @data: a #GstCollectData2.
+ * @flag: the #GstCollectPads2StateFlags to set.
+ *
+ * Sets a state flag on a collected pad.
+ */
+#define GST_COLLECT_PADS2_STATE_SET(data,flag) (GST_COLLECT_PADS2_STATE (data) |= flag)
+/**
+ * GST_COLLECT_PADS2_STATE_UNSET:
+ * @data: a #GstCollectData2.
+ * @flag: the #GstCollectPads2StateFlags to clear.
+ *
+ * Clears a state flag on a collected pad.
+ */
+#define GST_COLLECT_PADS2_STATE_UNSET(data,flag) (GST_COLLECT_PADS2_STATE (data) &= ~(flag))
+
+#define GST_COLLECT_PADS2_FLOW_DROP GST_FLOW_CUSTOM_SUCCESS
+
+/**
+ * GstCollectData2:
+ * @collect: owner #GstCollectPads2
+ * @pad: #GstPad managed by this data
+ * @buffer: currently queued buffer.
+ * @pos: position in the buffer
+ * @segment: last segment received.
+ *
+ * Structure used by the collect_pads2.
+ */
+struct _GstCollectData2
+{
+ /* with STREAM_LOCK of @collect */
+ GstCollectPads2 *collect;
+ GstPad *pad;
+ GstBuffer *buffer;
+ guint pos;
+ GstSegment segment;
+
+ /*< private >*/
+ /* state: bitfield for easier extension;
+ * eos, flushing, new_segment, waiting */
+ guint state;
+
+ /* refcounting for struct, and destroy callback */
+ GstCollectData2DestroyNotify destroy_notify;
+ gint refcount;
+
+ gpointer _gst_reserved[GST_PADDING];
+};
+
+/**
+ * GstCollectPads2Function:
+ * @pads: the #GstCollectPads2 that trigered the callback
+ * @user_data: user data passed to gst_collect_pads2_set_function()
+ *
+ * A function that will be called when all pads have received data.
+ *
+ * Returns: #GST_FLOW_OK for success
+ */
+typedef GstFlowReturn (*GstCollectPads2Function) (GstCollectPads2 *pads, gpointer user_data);
+
+/**
+ * GstCollectPads2BufferFunction:
+ * @pads: the #GstCollectPads2 that trigered the callback
+ * @data: the #GstCollectData2 of pad that has received the buffer
+ * @buffer: the #GstBuffer
+ * @user_data: user data passed to gst_collect_pads2_set_buffer_function()
+ *
+ * A function that will be called when a (considered oldest) buffer can be muxed.
+ * If all pads have reached EOS, this function is called with NULL @buffer
+ * and NULL @data.
+ *
+ * Returns: #GST_FLOW_OK for success
+ */
+typedef GstFlowReturn (*GstCollectPads2BufferFunction) (GstCollectPads2 *pads, GstCollectData2 *data,
+ GstBuffer *buffer, gpointer user_data);
+
+/**
+ * GstCollectPads2CompareFunction:
+ * @pads: the #GstCollectPads that is comparing the timestamps
+ * @data1: the first #GstCollectData2
+ * @timestamp1: the first timestamp
+ * @data2: the second #GstCollectData2
+ * @timestamp2: the second timestamp
+ * @user_data: user data passed to gst_collect_pads2_set_compare_function()
+ *
+ * A function for comparing two timestamps of buffers or newsegments collected on one pad.
+ *
+ * Returns: Integer less than zero when first timestamp is deemed older than the second one.
+ * Zero if the timestamps are deemed equally old.
+ * Integer greate than zero when second timestamp is deemed older than the first one.
+ */
+typedef gint (*GstCollectPads2CompareFunction) (GstCollectPads2 *pads,
+ GstCollectData2 * data1, GstClockTime timestamp1,
+ GstCollectData2 * data2, GstClockTime timestamp2,
+ gpointer user_data);
+
+/**
+ * GstCollectPads2EventFunction:
+ * @pads: the #GstCollectPads2 that trigered the callback
+ * @pad: the #GstPad that received an event
+ * @event: the #GstEvent received
+ * @user_data: user data passed to gst_collect_pads2_set_event_function()
+ *
+ * A function that will be called after collectpads has processed the event.
+ *
+ * Returns: %TRUE if the pad could handle the event
+ */
+typedef gboolean (*GstCollectPads2EventFunction) (GstCollectPads2 *pads, GstCollectData2 * pad,
+ GstEvent * event, gpointer user_data);
+
+/**
+ * GST_COLLECT_PADS2_GET_STREAM_LOCK:
+ * @pads: a #GstCollectPads2
+ *
+ * Get the stream lock of @pads. The stream lock is used to coordinate and
+ * serialize execution among the various streams being collected, and in
+ * protecting the resources used to accomplish this.
+ */
+#define GST_COLLECT_PADS2_GET_STREAM_LOCK(pads) (&((GstCollectPads2 *)pads)->stream_lock)
+/**
+ * GST_COLLECT_PADS2_STREAM_LOCK:
+ * @pads: a #GstCollectPads2
+ *
+ * Lock the stream lock of @pads.
+ */
+#define GST_COLLECT_PADS2_STREAM_LOCK(pads) (g_static_rec_mutex_lock(GST_COLLECT_PADS2_GET_STREAM_LOCK (pads)))
+/**
+ * GST_COLLECT_PADS2_STREAM_UNLOCK:
+ * @pads: a #GstCollectPads2
+ *
+ * Unlock the stream lock of @pads.
+ */
+#define GST_COLLECT_PADS2_STREAM_UNLOCK(pads) (g_static_rec_mutex_unlock(GST_COLLECT_PADS2_GET_STREAM_LOCK (pads)))
+
+/**
+ * GstCollectPads2:
+ * @data: #GList of #GstCollectData2 managed by this #GstCollectPads2.
+ *
+ * Collectpads object.
+ */
+struct _GstCollectPads2 {
+ GstObject object;
+
+ /*< public >*/ /* with LOCK and/or STREAM_LOCK */
+ GSList *data; /* list of CollectData items */
+
+ /*< private >*/
+ GStaticRecMutex stream_lock; /* used to serialize collection among several streams */
+ /* with LOCK and/or STREAM_LOCK*/
+ gboolean started;
+
+ /* with STREAM_LOCK */
+ guint32 cookie; /* @data list cookie */
+ guint numpads; /* number of pads in @data */
+ guint queuedpads; /* number of pads with a buffer */
+ guint eospads; /* number of pads that are EOS */
+ GstClockTime earliest_time; /* Current earliest time */
+ GstCollectData2 *earliest_data; /* Pad data for current earliest time */
+
+ /* with LOCK */
+ GSList *pad_list; /* updated pad list */
+ guint32 pad_cookie; /* updated cookie */
+
+ GstCollectPads2Function func; /* function and user_data for callback */
+ gpointer user_data;
+ GstCollectPads2BufferFunction prepare_buffer_func; /* function and user_data for prepare buffer callback */
+ gpointer prepare_buffer_user_data;
+ GstCollectPads2BufferFunction buffer_func; /* function and user_data for buffer callback */
+ gpointer buffer_user_data;
+ GstCollectPads2CompareFunction compare_func;
+ gpointer compare_user_data;
+ GstCollectPads2EventFunction event_func; /* function and data for event callback */
+ gpointer event_user_data;
+
+ /* no other lock needed */
+ GMutex *evt_lock; /* these make up sort of poor man's event signaling */
+ GCond *evt_cond;
+ guint32 evt_cookie;
+
+ gpointer _gst_reserved[GST_PADDING + 0];
+
+};
+
+struct _GstCollectPads2Class {
+ GstObjectClass parent_class;
+
+ /*< private >*/
+ gpointer _gst_reserved[GST_PADDING];
+};
+
+GType gst_collect_pads2_get_type(void);
+
+/* creating the object */
+GstCollectPads2* gst_collect_pads2_new (void);
+
+/* set the callbacks */
+void gst_collect_pads2_set_function (GstCollectPads2 *pads, GstCollectPads2Function func,
+ gpointer user_data);
+void gst_collect_pads2_set_prepare_buffer_function (GstCollectPads2 *pads,
+ GstCollectPads2BufferFunction func, gpointer user_data);
+void gst_collect_pads2_set_buffer_function (GstCollectPads2 *pads,
+ GstCollectPads2BufferFunction func, gpointer user_data);
+void gst_collect_pads2_set_event_function (GstCollectPads2 *pads,
+ GstCollectPads2EventFunction func, gpointer user_data);
+void gst_collect_pads2_set_compare_function (GstCollectPads2 *pads,
+ GstCollectPads2CompareFunction func, gpointer user_data);
+
+/* pad management */
+GstCollectData2* gst_collect_pads2_add_pad (GstCollectPads2 *pads, GstPad *pad, guint size);
+GstCollectData2* gst_collect_pads2_add_pad_full (GstCollectPads2 *pads, GstPad *pad, guint size, GstCollectData2DestroyNotify destroy_notify,
+ gboolean lock);
+gboolean gst_collect_pads2_remove_pad (GstCollectPads2 *pads, GstPad *pad);
+gboolean gst_collect_pads2_is_active (GstCollectPads2 *pads, GstPad *pad);
+void gst_mux_pads_set_locked (GstCollectPads2 *pads, GstCollectData2 *data,
+ gboolean locked);
+
+/* start/stop collection */
+GstFlowReturn gst_collect_pads2_collect (GstCollectPads2 *pads);
+GstFlowReturn gst_collect_pads2_collect_range (GstCollectPads2 *pads, guint64 offset, guint length);
+
+void gst_collect_pads2_start (GstCollectPads2 *pads);
+void gst_collect_pads2_stop (GstCollectPads2 *pads);
+void gst_collect_pads2_set_flushing (GstCollectPads2 *pads, gboolean flushing);
+
+/* get collected buffers */
+GstBuffer* gst_collect_pads2_peek (GstCollectPads2 *pads, GstCollectData2 *data);
+GstBuffer* gst_collect_pads2_pop (GstCollectPads2 *pads, GstCollectData2 *data);
+
+/* get collected bytes */
+guint gst_collect_pads2_available (GstCollectPads2 *pads);
+guint gst_collect_pads2_read (GstCollectPads2 *pads, GstCollectData2 *data,
+ guint8 **bytes, guint size);
+guint gst_collect_pads2_flush (GstCollectPads2 *pads, GstCollectData2 *data,
+ guint size);
+GstBuffer* gst_collect_pads2_read_buffer (GstCollectPads2 * pads, GstCollectData2 * data,
+ guint size);
+GstBuffer* gst_collect_pads2_take_buffer (GstCollectPads2 * pads, GstCollectData2 * data,
+ guint size);
+
+/* setting and unsetting waiting mode */
+void gst_collect_pads2_set_waiting (GstCollectPads2 *pads, GstCollectData2 *data,
+ gboolean waiting);
+
+
+G_END_DECLS
+
+#endif /* __GST_COLLECT_PADS22_H__ */
#endif
#include "videomixer.h"
+#include "videomixer2.h"
GST_DEBUG_CATEGORY_STATIC (gst_videomixer_debug);
#define GST_CAT_DEFAULT gst_videomixer_debug
gst_video_mixer_init_blend ();
return gst_element_register (plugin, "videomixer", GST_RANK_PRIMARY,
- GST_TYPE_VIDEO_MIXER);
+ GST_TYPE_VIDEO_MIXER) && gst_videomixer2_register (plugin);
}
GST_PLUGIN_DEFINE (GST_VERSION_MAJOR,
--- /dev/null
+/* Generic video mixer plugin
+ * Copyright (C) 2004, 2008 Wim Taymans <wim@fluendo.com>
+ * Copyright (C) 2010 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 <string.h>
+
+#include "videomixer2.h"
+
+#include <gst/controller/gstcontroller.h>
+
+GST_DEBUG_CATEGORY_STATIC (gst_videomixer2_debug);
+#define GST_CAT_DEFAULT gst_videomixer2_debug
+
+#define GST_VIDEO_MIXER2_GET_LOCK(mix) \
+ (GST_VIDEO_MIXER2(mix)->lock)
+#define GST_VIDEO_MIXER2_LOCK(mix) \
+ (g_mutex_lock(GST_VIDEO_MIXER2_GET_LOCK (mix)))
+#define GST_VIDEO_MIXER2_UNLOCK(mix) \
+ (g_mutex_unlock(GST_VIDEO_MIXER2_GET_LOCK (mix)))
+
+static GstStaticPadTemplate src_factory = GST_STATIC_PAD_TEMPLATE ("src",
+ GST_PAD_SRC,
+ GST_PAD_ALWAYS,
+ GST_STATIC_CAPS (GST_VIDEO_CAPS_YUV ("AYUV") ";" GST_VIDEO_CAPS_BGRA ";"
+ GST_VIDEO_CAPS_ARGB ";" GST_VIDEO_CAPS_RGBA ";" GST_VIDEO_CAPS_ABGR ";"
+ GST_VIDEO_CAPS_YUV ("Y444") ";" GST_VIDEO_CAPS_YUV ("Y42B") ";"
+ GST_VIDEO_CAPS_YUV ("YUY2") ";" GST_VIDEO_CAPS_YUV ("UYVY") ";"
+ GST_VIDEO_CAPS_YUV ("YVYU") ";"
+ GST_VIDEO_CAPS_YUV ("I420") ";" GST_VIDEO_CAPS_YUV ("YV12") ";"
+ GST_VIDEO_CAPS_YUV ("Y41B") ";" GST_VIDEO_CAPS_RGB ";"
+ GST_VIDEO_CAPS_BGR ";" GST_VIDEO_CAPS_xRGB ";" GST_VIDEO_CAPS_xBGR ";"
+ GST_VIDEO_CAPS_RGBx ";" GST_VIDEO_CAPS_BGRx)
+ );
+
+static GstStaticPadTemplate sink_factory = GST_STATIC_PAD_TEMPLATE ("sink_%d",
+ GST_PAD_SINK,
+ GST_PAD_REQUEST,
+ GST_STATIC_CAPS (GST_VIDEO_CAPS_YUV ("AYUV") ";" GST_VIDEO_CAPS_BGRA ";"
+ GST_VIDEO_CAPS_ARGB ";" GST_VIDEO_CAPS_RGBA ";" GST_VIDEO_CAPS_ABGR ";"
+ GST_VIDEO_CAPS_YUV ("Y444") ";" GST_VIDEO_CAPS_YUV ("Y42B") ";"
+ GST_VIDEO_CAPS_YUV ("YUY2") ";" GST_VIDEO_CAPS_YUV ("UYVY") ";"
+ GST_VIDEO_CAPS_YUV ("YVYU") ";"
+ GST_VIDEO_CAPS_YUV ("I420") ";" GST_VIDEO_CAPS_YUV ("YV12") ";"
+ GST_VIDEO_CAPS_YUV ("Y41B") ";" GST_VIDEO_CAPS_RGB ";"
+ GST_VIDEO_CAPS_BGR ";" GST_VIDEO_CAPS_xRGB ";" GST_VIDEO_CAPS_xBGR ";"
+ GST_VIDEO_CAPS_RGBx ";" GST_VIDEO_CAPS_BGRx)
+ );
+
+static void gst_videomixer2_child_proxy_init (gpointer g_iface,
+ gpointer iface_data);
+static gboolean gst_videomixer2_push_sink_event (GstVideoMixer2 * mix,
+ GstEvent * event);
+static void gst_videomixer2_release_pad (GstElement * element, GstPad * pad);
+static void gst_videomixer2_reset_qos (GstVideoMixer2 * mix);
+
+static void
+_do_init (GType object_type)
+{
+ static const GInterfaceInfo child_proxy_info = {
+ (GInterfaceInitFunc) gst_videomixer2_child_proxy_init,
+ NULL,
+ NULL
+ };
+
+ g_type_add_interface_static (object_type, GST_TYPE_CHILD_PROXY,
+ &child_proxy_info);
+}
+
+/* GstVideoMixer2Pad */
+#define GST_TYPE_VIDEO_MIXER2_PAD (gst_videomixer2_pad_get_type())
+#define GST_VIDEO_MIXER2_PAD(obj) \
+ (G_TYPE_CHECK_INSTANCE_CAST((obj),GST_TYPE_VIDEO_MIXER2_PAD, GstVideoMixer2Pad))
+#define GST_VIDEO_MIXER2_PAD_CLASS(klass) \
+ (G_TYPE_CHECK_CLASS_CAST((klass),GST_TYPE_VIDEO_MIXER_PAD, GstVideoMixer2PadClass))
+#define GST_IS_VIDEO_MIXER2_PAD(obj) \
+ (G_TYPE_CHECK_INSTANCE_TYPE((obj),GST_TYPE_VIDEO_MIXER2_PAD))
+#define GST_IS_VIDEO_MIXER2_PAD_CLASS(klass) \
+ (G_TYPE_CHECK_CLASS_TYPE((klass),GST_TYPE_VIDEO_MIXER2_PAD))
+
+typedef struct _GstVideoMixer2Pad GstVideoMixer2Pad;
+typedef struct _GstVideoMixer2PadClass GstVideoMixer2PadClass;
+typedef struct _GstVideoMixer2Collect GstVideoMixer2Collect;
+
+struct _GstVideoMixer2Collect
+{
+ GstCollectData2 collect; /* we extend the CollectData */
+
+ GstVideoMixer2Pad *mixpad;
+
+ GstBuffer *queued; /* buffer for which we don't know the end time yet */
+
+ GstBuffer *buffer; /* buffer that should be blended now */
+ GstClockTime start_time;
+ GstClockTime end_time;
+};
+
+/* all information needed for one video stream */
+struct _GstVideoMixer2Pad
+{
+ GstPad parent; /* subclass the pad */
+
+ /* caps */
+ gint width, height;
+ gint fps_n;
+ gint fps_d;
+
+ /* properties */
+ gint xpos, ypos;
+ guint zorder;
+ gdouble alpha;
+
+ GstVideoMixer2Collect *mixcol;
+};
+
+struct _GstVideoMixer2PadClass
+{
+ GstPadClass parent_class;
+};
+
+#define DEFAULT_PAD_ZORDER 0
+#define DEFAULT_PAD_XPOS 0
+#define DEFAULT_PAD_YPOS 0
+#define DEFAULT_PAD_ALPHA 1.0
+enum
+{
+ PROP_PAD_0,
+ PROP_PAD_ZORDER,
+ PROP_PAD_XPOS,
+ PROP_PAD_YPOS,
+ PROP_PAD_ALPHA
+};
+
+GType gst_videomixer2_pad_get_type (void);
+G_DEFINE_TYPE (GstVideoMixer2Pad, gst_videomixer2_pad, GST_TYPE_PAD);
+
+static void
+gst_videomixer2_collect_free (GstCollectData2 * data)
+{
+ GstVideoMixer2Collect *cdata = (GstVideoMixer2Collect *) data;
+
+ gst_buffer_replace (&cdata->buffer, NULL);
+}
+
+static gboolean
+gst_videomixer2_update_src_caps (GstVideoMixer2 * mix)
+{
+ GSList *l;
+ gint best_width = -1, best_height = -1;
+ gdouble best_fps = -1, cur_fps;
+ gint best_fps_n = -1, best_fps_d = -1;
+ gboolean ret = TRUE;
+
+ GST_VIDEO_MIXER2_LOCK (mix);
+
+ for (l = mix->sinkpads; l; l = l->next) {
+ GstVideoMixer2Pad *mpad = l->data;
+ gint this_width, this_height;
+
+ if (mpad->fps_n == 0 || mpad->fps_d == 0 ||
+ mpad->width == 0 || mpad->height == 0)
+ continue;
+
+ this_width = mpad->width + MAX (mpad->xpos, 0);
+ this_height = mpad->height + MAX (mpad->ypos, 0);
+
+ if (best_width < this_width)
+ best_width = this_width;
+ if (best_height < this_height)
+ best_height = this_height;
+
+ if (mpad->fps_d == 0)
+ cur_fps = 0.0;
+ else
+ gst_util_fraction_to_double (mpad->fps_n, mpad->fps_d, &cur_fps);
+ if (best_fps < cur_fps) {
+ best_fps = cur_fps;
+ best_fps_n = mpad->fps_n;
+ best_fps_d = mpad->fps_d;
+ }
+ }
+
+ if (best_fps_n <= 0 && best_fps_d <= 0) {
+ best_fps_n = 25;
+ best_fps_d = 1;
+ best_fps = 25.0;
+ }
+
+ if (best_width > 0 && best_height > 0 && best_fps > 0) {
+ GstCaps *caps, *peercaps;
+ GstStructure *s;
+
+ if (mix->fps_n != best_fps_n || mix->fps_d != best_fps_d) {
+ if (mix->segment.last_stop != -1) {
+ mix->ts_offset = mix->segment.last_stop - mix->segment.start;
+ mix->nframes = 0;
+ }
+ }
+
+ caps = gst_video_format_new_caps (mix->format,
+ best_width, best_height, best_fps_n, best_fps_d,
+ mix->par_n, mix->par_d);
+
+ peercaps = gst_pad_peer_get_caps (mix->srcpad);
+ if (peercaps) {
+ GstCaps *tmp;
+
+ s = gst_caps_get_structure (caps, 0);
+ gst_structure_set (s, "width", GST_TYPE_INT_RANGE, 1, G_MAXINT, "height",
+ GST_TYPE_INT_RANGE, 1, G_MAXINT, "framerate", GST_TYPE_FRACTION_RANGE,
+ 0, 1, G_MAXINT, 1, NULL);
+
+ tmp = gst_caps_intersect (caps, peercaps);
+ gst_caps_unref (caps);
+ gst_caps_unref (peercaps);
+ caps = tmp;
+ if (gst_caps_is_empty (caps)) {
+ GST_VIDEO_MIXER2_UNLOCK (mix);
+ goto done;
+ }
+
+ gst_caps_truncate (caps);
+ s = gst_caps_get_structure (caps, 0);
+ gst_structure_fixate_field_nearest_int (s, "width", best_width);
+ gst_structure_fixate_field_nearest_int (s, "height", best_height);
+ gst_structure_fixate_field_nearest_fraction (s, "framerate", best_fps_n,
+ best_fps_d);
+
+ gst_structure_get_int (s, "width", &best_width);
+ gst_structure_get_int (s, "height", &best_height);
+ gst_structure_get_fraction (s, "fraction", &best_fps_n, &best_fps_d);
+ }
+
+ mix->fps_n = best_fps_n;
+ mix->fps_d = best_fps_d;
+ mix->width = best_width;
+ mix->height = best_height;
+
+ GST_VIDEO_MIXER2_UNLOCK (mix);
+ ret = gst_pad_set_caps (mix->srcpad, caps);
+ gst_caps_unref (caps);
+ } else {
+ GST_VIDEO_MIXER2_UNLOCK (mix);
+ }
+
+done:
+ return ret;
+}
+
+
+static gboolean
+gst_videomixer2_pad_sink_setcaps (GstPad * pad, GstCaps * caps)
+{
+ GstVideoMixer2 *mix;
+ GstVideoMixer2Pad *mixpad;
+ GstVideoFormat fmt;
+ gint width, height;
+ gint fps_n = 0, fps_d = 0;
+ gint par_n = 1, par_d = 1;
+ gboolean ret = FALSE;
+ GstStructure *s;
+
+ GST_INFO_OBJECT (pad, "Setting caps %" GST_PTR_FORMAT, caps);
+
+ mix = GST_VIDEO_MIXER2 (gst_pad_get_parent (pad));
+ mixpad = GST_VIDEO_MIXER2_PAD (pad);
+
+ if (!gst_video_format_parse_caps (caps, &fmt, &width, &height) ||
+ !gst_video_parse_caps_pixel_aspect_ratio (caps, &par_n, &par_d)) {
+ GST_ERROR_OBJECT (pad, "Failed to parse caps");
+ goto beach;
+ }
+
+ s = gst_caps_get_structure (caps, 0);
+ if (gst_structure_has_field (s, "framerate")
+ && !gst_video_parse_caps_framerate (caps, &fps_n, &fps_d)) {
+ GST_ERROR_OBJECT (pad, "Failed to parse caps");
+ goto beach;
+ }
+
+ GST_VIDEO_MIXER2_LOCK (mix);
+ if (mix->format != GST_VIDEO_FORMAT_UNKNOWN) {
+ if (mix->format != fmt || mix->par_n != par_n || mix->par_d != par_d) {
+ GST_ERROR_OBJECT (pad, "Caps not compatible with other pads' caps");
+ GST_VIDEO_MIXER2_UNLOCK (mix);
+ goto beach;
+ }
+ }
+
+ mix->format = fmt;
+ mix->par_n = par_n;
+ mix->par_d = par_d;
+ mixpad->fps_n = fps_n;
+ mixpad->fps_d = fps_d;
+ mixpad->width = width;
+ mixpad->height = height;
+
+ GST_VIDEO_MIXER2_UNLOCK (mix);
+
+ ret = gst_videomixer2_update_src_caps (mix);
+
+beach:
+ gst_object_unref (mix);
+
+ return ret;
+}
+
+static GstCaps *
+gst_videomixer2_pad_sink_getcaps (GstPad * pad)
+{
+ GstVideoMixer2 *mix;
+ GstVideoMixer2Pad *mixpad;
+ GstCaps *srccaps;
+ GstStructure *s;
+ gint i, n;
+
+ mix = GST_VIDEO_MIXER2 (gst_pad_get_parent (pad));
+ mixpad = GST_VIDEO_MIXER2_PAD (pad);
+
+ srccaps = gst_pad_get_fixed_caps_func (GST_PAD (mix->srcpad));
+ srccaps = gst_caps_make_writable (srccaps);
+
+ n = gst_caps_get_size (srccaps);
+ for (i = 0; i < n; i++) {
+ s = gst_caps_get_structure (srccaps, i);
+ gst_structure_set (s, "width", GST_TYPE_INT_RANGE, 1, G_MAXINT,
+ "height", GST_TYPE_INT_RANGE, 1, G_MAXINT,
+ "framerate", GST_TYPE_FRACTION_RANGE, 0, 1, G_MAXINT, 1, NULL);
+ if (!gst_structure_has_field (s, "pixel-aspect-ratio"))
+ gst_structure_set (s, "pixel-aspect-ratio", GST_TYPE_FRACTION, 1, 1,
+ NULL);
+ }
+
+ GST_DEBUG_OBJECT (pad, "Returning %" GST_PTR_FORMAT, srccaps);
+
+ return srccaps;
+}
+
+static gboolean
+gst_videomixer2_pad_sink_acceptcaps (GstPad * pad, GstCaps * caps)
+{
+ gboolean ret;
+ GstVideoMixer2 *mix;
+ GstCaps *accepted_caps;
+ gint i, n;
+ GstStructure *s;
+
+ mix = GST_VIDEO_MIXER2 (gst_pad_get_parent (pad));
+ GST_DEBUG_OBJECT (pad, "%" GST_PTR_FORMAT, caps);
+
+ accepted_caps = gst_pad_get_fixed_caps_func (GST_PAD (mix->srcpad));
+ accepted_caps = gst_caps_make_writable (accepted_caps);
+ GST_LOG_OBJECT (pad, "src caps %" GST_PTR_FORMAT, accepted_caps);
+
+ n = gst_caps_get_size (accepted_caps);
+ for (i = 0; i < n; i++) {
+ s = gst_caps_get_structure (accepted_caps, i);
+ gst_structure_set (s, "width", GST_TYPE_INT_RANGE, 1, G_MAXINT,
+ "height", GST_TYPE_INT_RANGE, 1, G_MAXINT,
+ "framerate", GST_TYPE_FRACTION_RANGE, 0, 1, G_MAXINT, 1, NULL);
+ if (!gst_structure_has_field (s, "pixel-aspect-ratio"))
+ gst_structure_set (s, "pixel-aspect-ratio", GST_TYPE_FRACTION, 1, 1,
+ NULL);
+ }
+
+ ret = gst_caps_can_intersect (caps, accepted_caps);
+ GST_INFO_OBJECT (pad, "%saccepted caps %" GST_PTR_FORMAT, (ret ? "" : "not "),
+ caps);
+ GST_INFO_OBJECT (pad, "acceptable caps are %" GST_PTR_FORMAT, accepted_caps);
+
+ gst_caps_unref (accepted_caps);
+
+ gst_object_unref (mix);
+ return ret;
+}
+
+static void
+gst_videomixer2_pad_get_property (GObject * object, guint prop_id,
+ GValue * value, GParamSpec * pspec)
+{
+ GstVideoMixer2Pad *pad = GST_VIDEO_MIXER2_PAD (object);
+
+ switch (prop_id) {
+ case PROP_PAD_ZORDER:
+ g_value_set_uint (value, pad->zorder);
+ break;
+ case PROP_PAD_XPOS:
+ g_value_set_int (value, pad->xpos);
+ break;
+ case PROP_PAD_YPOS:
+ g_value_set_int (value, pad->ypos);
+ break;
+ case PROP_PAD_ALPHA:
+ g_value_set_double (value, pad->alpha);
+ break;
+ default:
+ G_OBJECT_WARN_INVALID_PROPERTY_ID (object, prop_id, pspec);
+ break;
+ }
+}
+
+static int
+pad_zorder_compare (const GstVideoMixer2Pad * pad1,
+ const GstVideoMixer2Pad * pad2)
+{
+ return pad1->zorder - pad2->zorder;
+}
+
+static void
+gst_videomixer2_pad_set_property (GObject * object, guint prop_id,
+ const GValue * value, GParamSpec * pspec)
+{
+ GstVideoMixer2Pad *pad = GST_VIDEO_MIXER2_PAD (object);
+ GstVideoMixer2 *mix = GST_VIDEO_MIXER2 (gst_pad_get_parent (GST_PAD (pad)));
+
+ switch (prop_id) {
+ case PROP_PAD_ZORDER:
+ GST_VIDEO_MIXER2_LOCK (mix);
+ pad->zorder = g_value_get_uint (value);
+
+ mix->sinkpads = g_slist_sort (mix->sinkpads,
+ (GCompareFunc) pad_zorder_compare);
+ GST_VIDEO_MIXER2_UNLOCK (mix);
+ break;
+ case PROP_PAD_XPOS:
+ pad->xpos = g_value_get_int (value);
+ break;
+ case PROP_PAD_YPOS:
+ pad->ypos = g_value_get_int (value);
+ break;
+ case PROP_PAD_ALPHA:
+ pad->alpha = g_value_get_double (value);
+ break;
+ default:
+ G_OBJECT_WARN_INVALID_PROPERTY_ID (object, prop_id, pspec);
+ break;
+ }
+
+ gst_object_unref (mix);
+}
+
+static void
+gst_videomixer2_pad_class_init (GstVideoMixer2PadClass * klass)
+{
+ GObjectClass *gobject_class = (GObjectClass *) klass;
+
+ gobject_class->set_property = gst_videomixer2_pad_set_property;
+ gobject_class->get_property = gst_videomixer2_pad_get_property;
+
+ g_object_class_install_property (gobject_class, PROP_PAD_ZORDER,
+ g_param_spec_uint ("zorder", "Z-Order", "Z Order of the picture",
+ 0, 10000, DEFAULT_PAD_ZORDER,
+ G_PARAM_READWRITE | GST_PARAM_CONTROLLABLE | G_PARAM_STATIC_STRINGS));
+ g_object_class_install_property (gobject_class, PROP_PAD_XPOS,
+ g_param_spec_int ("xpos", "X Position", "X Position of the picture",
+ G_MININT, G_MAXINT, DEFAULT_PAD_XPOS,
+ G_PARAM_READWRITE | GST_PARAM_CONTROLLABLE | G_PARAM_STATIC_STRINGS));
+ g_object_class_install_property (gobject_class, PROP_PAD_YPOS,
+ g_param_spec_int ("ypos", "Y Position", "Y Position of the picture",
+ G_MININT, G_MAXINT, DEFAULT_PAD_YPOS,
+ G_PARAM_READWRITE | GST_PARAM_CONTROLLABLE | G_PARAM_STATIC_STRINGS));
+ g_object_class_install_property (gobject_class, PROP_PAD_ALPHA,
+ g_param_spec_double ("alpha", "Alpha", "Alpha of the picture", 0.0, 1.0,
+ DEFAULT_PAD_ALPHA,
+ G_PARAM_READWRITE | GST_PARAM_CONTROLLABLE | G_PARAM_STATIC_STRINGS));
+}
+
+static void
+gst_videomixer2_pad_init (GstVideoMixer2Pad * mixerpad)
+{
+ /* setup some pad functions */
+ gst_pad_set_setcaps_function (GST_PAD (mixerpad),
+ gst_videomixer2_pad_sink_setcaps);
+ gst_pad_set_acceptcaps_function (GST_PAD (mixerpad),
+ GST_DEBUG_FUNCPTR (gst_videomixer2_pad_sink_acceptcaps));
+ gst_pad_set_getcaps_function (GST_PAD (mixerpad),
+ gst_videomixer2_pad_sink_getcaps);
+
+ mixerpad->zorder = DEFAULT_PAD_ZORDER;
+ mixerpad->xpos = DEFAULT_PAD_XPOS;
+ mixerpad->ypos = DEFAULT_PAD_YPOS;
+ mixerpad->alpha = DEFAULT_PAD_ALPHA;
+}
+
+/* GstVideoMixer2 */
+#define DEFAULT_BACKGROUND VIDEO_MIXER2_BACKGROUND_CHECKER
+enum
+{
+ PROP_0,
+ PROP_BACKGROUND
+};
+
+#define GST_TYPE_VIDEO_MIXER2_BACKGROUND (gst_videomixer2_background_get_type())
+static GType
+gst_videomixer2_background_get_type (void)
+{
+ static GType video_mixer_background_type = 0;
+
+ static const GEnumValue video_mixer_background[] = {
+ {VIDEO_MIXER2_BACKGROUND_CHECKER, "Checker pattern", "checker"},
+ {VIDEO_MIXER2_BACKGROUND_BLACK, "Black", "black"},
+ {VIDEO_MIXER2_BACKGROUND_WHITE, "White", "white"},
+ {0, NULL, NULL},
+ };
+
+ if (!video_mixer_background_type) {
+ video_mixer_background_type =
+ g_enum_register_static ("GstVideoMixer2Background",
+ video_mixer_background);
+ }
+ return video_mixer_background_type;
+}
+
+
+GST_BOILERPLATE_FULL (GstVideoMixer2, gst_videomixer2, GstElement,
+ GST_TYPE_ELEMENT, _do_init);
+
+static void
+gst_videomixer2_update_qos (GstVideoMixer2 * mix, gdouble proportion,
+ GstClockTimeDiff diff, GstClockTime timestamp)
+{
+ GST_DEBUG_OBJECT (mix,
+ "Updating QoS: proportion %lf, diff %s%" GST_TIME_FORMAT ", timestamp %"
+ GST_TIME_FORMAT, proportion, (diff < 0) ? "-" : "",
+ GST_TIME_ARGS (ABS (diff)), GST_TIME_ARGS (timestamp));
+
+ GST_OBJECT_LOCK (mix);
+ mix->proportion = proportion;
+ if (G_LIKELY (timestamp != GST_CLOCK_TIME_NONE)) {
+ if (G_UNLIKELY (diff > 0))
+ mix->earliest_time =
+ timestamp + 2 * diff + gst_util_uint64_scale_int (GST_SECOND,
+ mix->fps_d, mix->fps_n);
+ else
+ mix->earliest_time = timestamp + diff;
+ } else {
+ mix->earliest_time = GST_CLOCK_TIME_NONE;
+ }
+ GST_OBJECT_UNLOCK (mix);
+}
+
+static void
+gst_videomixer2_reset_qos (GstVideoMixer2 * mix)
+{
+ gst_videomixer2_update_qos (mix, 0.5, 0, GST_CLOCK_TIME_NONE);
+ mix->qos_processed = mix->qos_dropped = 0;
+}
+
+static void
+gst_videomixer2_read_qos (GstVideoMixer2 * mix, gdouble * proportion,
+ GstClockTime * time)
+{
+ GST_OBJECT_LOCK (mix);
+ *proportion = mix->proportion;
+ *time = mix->earliest_time;
+ GST_OBJECT_UNLOCK (mix);
+}
+
+static void
+gst_videomixer2_reset (GstVideoMixer2 * mix)
+{
+ GSList *l;
+
+ mix->format = GST_VIDEO_FORMAT_UNKNOWN;
+ mix->width = mix->height = 0;
+ mix->fps_n = mix->fps_d = 0;
+ mix->par_n = mix->par_d = 0;
+ mix->ts_offset = 0;
+ mix->nframes = 0;
+
+ gst_segment_init (&mix->segment, GST_FORMAT_TIME);
+ mix->segment.last_stop = -1;
+
+ gst_videomixer2_reset_qos (mix);
+
+ for (l = mix->sinkpads; l; l = l->next) {
+ GstVideoMixer2Pad *p = l->data;
+ GstVideoMixer2Collect *mixcol = p->mixcol;
+
+ gst_buffer_replace (&mixcol->buffer, NULL);
+ mixcol->start_time = -1;
+ mixcol->end_time = -1;
+
+ p->fps_n = p->fps_d = 0;
+ p->width = p->height = 0;
+ }
+
+ mix->newseg_pending = TRUE;
+ mix->flush_stop_pending = FALSE;
+}
+
+/* 1 == OK
+ * 0 == need more data
+ * -1 == EOS
+ * -2 == error
+ */
+static gint
+gst_videomixer2_fill_queues (GstVideoMixer2 * mix,
+ GstClockTime output_start_time, GstClockTime output_end_time)
+{
+ GSList *l;
+ gboolean eos = TRUE;
+ gboolean need_more_data = FALSE;
+
+ for (l = mix->sinkpads; l; l = l->next) {
+ GstVideoMixer2Pad *pad = l->data;
+ GstVideoMixer2Collect *mixcol = pad->mixcol;
+ GstSegment *segment = &pad->mixcol->collect.segment;
+ GstBuffer *buf;
+
+ buf = gst_collect_pads2_peek (mix->collect, &mixcol->collect);
+ if (buf) {
+ GstClockTime start_time, end_time;
+
+ start_time = GST_BUFFER_TIMESTAMP (buf);
+ if (start_time == -1) {
+ gst_buffer_unref (buf);
+ GST_ERROR_OBJECT (pad, "Need timestamped buffers!");
+ return -2;
+ }
+
+ /* FIXME: Make all this work with negative rates */
+
+ if ((mixcol->buffer && start_time < GST_BUFFER_TIMESTAMP (mixcol->buffer))
+ || (mixcol->queued
+ && start_time < GST_BUFFER_TIMESTAMP (mixcol->queued))) {
+ GST_WARNING_OBJECT (pad, "Buffer from the past, dropping");
+ gst_buffer_unref (buf);
+ buf = gst_collect_pads2_pop (mix->collect, &mixcol->collect);
+ gst_buffer_unref (buf);
+ need_more_data = TRUE;
+ continue;
+ }
+
+ if (mixcol->queued) {
+ end_time = start_time - GST_BUFFER_TIMESTAMP (mixcol->queued);
+ start_time = GST_BUFFER_TIMESTAMP (mixcol->queued);
+ gst_buffer_unref (buf);
+ buf = gst_buffer_ref (mixcol->queued);
+ } else {
+ end_time = GST_BUFFER_DURATION (buf);
+
+ if (end_time == -1) {
+ mixcol->queued = buf;
+ need_more_data = TRUE;
+ continue;
+ }
+ }
+
+ g_assert (start_time != -1 && end_time != -1);
+ end_time += start_time; /* convert from duration to position */
+
+ if (mixcol->end_time != -1 && mixcol->end_time > end_time) {
+ GST_WARNING_OBJECT (pad, "Buffer from the past, dropping");
+ if (buf == mixcol->queued) {
+ gst_buffer_unref (buf);
+ gst_buffer_replace (&mixcol->queued, NULL);
+ } else {
+ gst_buffer_unref (buf);
+ buf = gst_collect_pads2_pop (mix->collect, &mixcol->collect);
+ gst_buffer_unref (buf);
+ }
+
+ need_more_data = TRUE;
+ continue;
+ }
+
+ /* Check if it's inside the segment */
+ if (start_time >= segment->stop || end_time < segment->start) {
+ GST_DEBUG_OBJECT (pad, "Buffer outside the segment");
+
+ if (buf == mixcol->queued) {
+ gst_buffer_unref (buf);
+ gst_buffer_replace (&mixcol->queued, NULL);
+ } else {
+ gst_buffer_unref (buf);
+ buf = gst_collect_pads2_pop (mix->collect, &mixcol->collect);
+ gst_buffer_unref (buf);
+ }
+
+ need_more_data = TRUE;
+ continue;
+ }
+
+ /* Clip to segment and convert to running time */
+ start_time = MAX (start_time, segment->start);
+ if (segment->stop != -1)
+ end_time = MIN (end_time, segment->stop);
+ start_time =
+ gst_segment_to_running_time (segment, GST_FORMAT_TIME, start_time);
+ end_time =
+ gst_segment_to_running_time (segment, GST_FORMAT_TIME, end_time);
+ g_assert (start_time != -1 && end_time != -1);
+
+ /* Convert to the output segment rate */
+ if (mix->segment.abs_rate != 1.0) {
+ start_time *= mix->segment.abs_rate;
+ end_time *= mix->segment.abs_rate;
+ }
+
+ if (end_time >= output_start_time && start_time < output_end_time) {
+ GST_DEBUG_OBJECT (pad,
+ "Taking new buffer with start time %" GST_TIME_FORMAT,
+ GST_TIME_ARGS (start_time));
+ gst_buffer_replace (&mixcol->buffer, buf);
+ mixcol->start_time = start_time;
+ mixcol->end_time = end_time;
+
+ if (buf == mixcol->queued) {
+ gst_buffer_unref (buf);
+ gst_buffer_replace (mixcol->queued, NULL);
+ } else {
+ gst_buffer_unref (buf);
+ buf = gst_collect_pads2_pop (mix->collect, &mixcol->collect);
+ gst_buffer_unref (buf);
+ }
+ eos = FALSE;
+ } else if (start_time >= output_end_time) {
+ GST_DEBUG_OBJECT (pad, "Keeping buffer until %" GST_TIME_FORMAT,
+ GST_TIME_ARGS (start_time));
+ eos = FALSE;
+ } else {
+ GST_DEBUG_OBJECT (pad, "Too old buffer -- dropping");
+ if (buf == mixcol->queued) {
+ gst_buffer_unref (buf);
+ gst_buffer_replace (&mixcol->queued, NULL);
+ } else {
+ gst_buffer_unref (buf);
+ buf = gst_collect_pads2_pop (mix->collect, &mixcol->collect);
+ gst_buffer_unref (buf);
+ }
+
+ need_more_data = TRUE;
+ continue;
+ }
+ } else {
+ if (mixcol->end_time != -1) {
+ if (mixcol->end_time < output_start_time) {
+ gst_buffer_replace (&mixcol->buffer, NULL);
+ mixcol->start_time = mixcol->end_time = -1;
+ if (!GST_COLLECT_PADS2_STATE_IS_SET (mixcol,
+ GST_COLLECT_PADS2_STATE_EOS))
+ need_more_data = TRUE;
+ } else {
+ eos = FALSE;
+ }
+ }
+ }
+ }
+
+ if (need_more_data)
+ return 0;
+ if (eos)
+ return -1;
+
+ return 1;
+}
+
+static GstFlowReturn
+gst_videomixer2_blend_buffers (GstVideoMixer2 * mix,
+ GstClockTime output_start_time, GstClockTime output_end_time,
+ GstBuffer ** outbuf)
+{
+ GSList *l;
+ GstFlowReturn ret;
+ guint outsize;
+
+ outsize = gst_video_format_get_size (mix->format, mix->width, mix->height);
+ ret = gst_pad_alloc_buffer_and_set_caps (mix->srcpad, GST_BUFFER_OFFSET_NONE,
+ outsize, GST_PAD_CAPS (mix->srcpad), outbuf);
+ if (ret != GST_FLOW_OK)
+ return ret;
+
+ GST_BUFFER_TIMESTAMP (*outbuf) = output_start_time;
+ GST_BUFFER_DURATION (*outbuf) = output_end_time - output_start_time;
+
+ switch (mix->background) {
+ case VIDEO_MIXER2_BACKGROUND_CHECKER:
+ mix->fill_checker (GST_BUFFER_DATA (*outbuf), mix->width, mix->height);
+ break;
+ case VIDEO_MIXER2_BACKGROUND_BLACK:
+ mix->fill_color (GST_BUFFER_DATA (*outbuf), mix->width,
+ mix->height, 16, 128, 128);
+ break;
+ case VIDEO_MIXER2_BACKGROUND_WHITE:
+ mix->fill_color (GST_BUFFER_DATA (*outbuf), mix->width,
+ mix->height, 240, 128, 128);
+ break;
+ }
+
+ for (l = mix->sinkpads; l; l = l->next) {
+ GstVideoMixer2Pad *pad = l->data;
+ GstVideoMixer2Collect *mixcol = pad->mixcol;
+
+ if (mixcol->buffer != NULL) {
+ GstClockTime timestamp;
+ gint64 stream_time;
+ GstSegment *seg;
+
+ seg = &mixcol->collect.segment;
+
+ timestamp = GST_BUFFER_TIMESTAMP (mixcol->buffer);
+
+ stream_time =
+ gst_segment_to_stream_time (seg, GST_FORMAT_TIME, timestamp);
+
+ /* sync object properties on stream time */
+ if (GST_CLOCK_TIME_IS_VALID (stream_time))
+ gst_object_sync_values (G_OBJECT (pad), stream_time);
+
+ mix->blend (GST_BUFFER_DATA (mixcol->buffer),
+ pad->xpos, pad->ypos, pad->width, pad->height, pad->alpha,
+ GST_BUFFER_DATA (*outbuf), mix->width, mix->height);
+ }
+ }
+
+ return GST_FLOW_OK;
+}
+
+/* Perform qos calculations before processing the next frame. Returns TRUE if
+ * the frame should be processed, FALSE if the frame can be dropped entirely */
+static gint64
+gst_videomixer2_do_qos (GstVideoMixer2 * mix, GstClockTime timestamp)
+{
+ GstClockTime qostime, earliest_time;
+ gdouble proportion;
+ gint64 jitter;
+
+ /* no timestamp, can't do QoS => process frame */
+ if (G_UNLIKELY (!GST_CLOCK_TIME_IS_VALID (timestamp))) {
+ GST_LOG_OBJECT (mix, "invalid timestamp, can't do QoS, process frame");
+ return -1;
+ }
+
+ /* get latest QoS observation values */
+ gst_videomixer2_read_qos (mix, &proportion, &earliest_time);
+
+ /* skip qos if we have no observation (yet) => process frame */
+ if (G_UNLIKELY (!GST_CLOCK_TIME_IS_VALID (earliest_time))) {
+ GST_LOG_OBJECT (mix, "no observation yet, process frame");
+ return -1;
+ }
+
+ /* qos is done on running time */
+ qostime =
+ gst_segment_to_running_time (&mix->segment, GST_FORMAT_TIME, timestamp);
+
+ /* see how our next timestamp relates to the latest qos timestamp */
+ GST_LOG_OBJECT (mix, "qostime %" GST_TIME_FORMAT ", earliest %"
+ GST_TIME_FORMAT, GST_TIME_ARGS (qostime), GST_TIME_ARGS (earliest_time));
+
+ jitter = GST_CLOCK_DIFF (qostime, earliest_time);
+ if (qostime != GST_CLOCK_TIME_NONE && jitter > 0) {
+ GST_DEBUG_OBJECT (mix, "we are late, drop frame");
+ return jitter;
+ }
+
+ GST_LOG_OBJECT (mix, "process frame");
+ return jitter;
+}
+
+static GstFlowReturn
+gst_videomixer2_collected (GstCollectPads2 * pads, GstVideoMixer2 * mix)
+{
+ GstFlowReturn ret;
+ GstClockTime output_start_time, output_end_time;
+ GstBuffer *outbuf = NULL;
+ gint res;
+ gint64 jitter;
+
+ /* If we're not negotiated yet... */
+ if (mix->format == GST_VIDEO_FORMAT_UNKNOWN)
+ return GST_FLOW_NOT_NEGOTIATED;
+
+ if (g_atomic_int_compare_and_exchange (&mix->flush_stop_pending, TRUE, FALSE)) {
+ GST_DEBUG_OBJECT (mix, "pending flush stop");
+ gst_pad_push_event (mix->srcpad, gst_event_new_flush_stop ());
+ }
+
+ GST_VIDEO_MIXER2_LOCK (mix);
+
+ if (mix->newseg_pending) {
+ GST_DEBUG_OBJECT (mix, "Sending NEWSEGMENT event");
+ if (!gst_pad_push_event (mix->srcpad, gst_event_new_new_segment_full (FALSE,
+ mix->segment.rate, mix->segment.applied_rate,
+ mix->segment.format, mix->segment.start, mix->segment.stop,
+ mix->segment.time))) {
+ ret = GST_FLOW_ERROR;
+ goto done;
+ }
+ mix->newseg_pending = FALSE;
+ }
+
+ if (mix->segment.last_stop == -1)
+ output_start_time = mix->segment.start;
+ else
+ output_start_time = mix->segment.last_stop;
+
+ if (output_start_time >= mix->segment.stop) {
+ GST_DEBUG_OBJECT (mix, "Segment done");
+ gst_pad_push_event (mix->srcpad, gst_event_new_eos ());
+ ret = GST_FLOW_UNEXPECTED;
+ goto done;
+ }
+
+ output_end_time =
+ mix->ts_offset + gst_util_uint64_scale (mix->nframes + 1,
+ GST_SECOND * mix->fps_d, mix->fps_n);
+ if (mix->segment.stop != -1)
+ output_end_time = MIN (output_end_time, mix->segment.stop);
+
+ res = gst_videomixer2_fill_queues (mix, output_start_time, output_end_time);
+
+ if (res == 0) {
+ GST_DEBUG_OBJECT (mix, "Need more data for decisions");
+ ret = GST_FLOW_OK;
+ goto done;
+ } else if (res == -1) {
+ GST_DEBUG_OBJECT (mix, "All sinkpads are EOS -- forwarding");
+ gst_pad_push_event (mix->srcpad, gst_event_new_eos ());
+ ret = GST_FLOW_UNEXPECTED;
+ goto done;
+ } else if (res == -2) {
+ GST_ERROR_OBJECT (mix, "Error collecting buffers");
+ ret = GST_FLOW_ERROR;
+ goto done;
+ }
+
+ jitter = gst_videomixer2_do_qos (mix, output_start_time);
+ if (jitter <= 0) {
+ ret =
+ gst_videomixer2_blend_buffers (mix, output_start_time,
+ output_end_time, &outbuf);
+ mix->qos_processed++;
+ } else {
+ GstMessage *msg;
+
+ mix->qos_dropped++;
+
+ /* TODO: live */
+ msg =
+ gst_message_new_qos (GST_OBJECT_CAST (mix), FALSE,
+ gst_segment_to_running_time (&mix->segment, GST_FORMAT_TIME,
+ output_start_time), gst_segment_to_stream_time (&mix->segment,
+ GST_FORMAT_TIME, output_start_time), output_start_time,
+ output_end_time - output_start_time);
+ gst_message_set_qos_values (msg, jitter, mix->proportion, 1000000);
+ gst_message_set_qos_stats (msg, GST_FORMAT_BUFFERS, mix->qos_processed,
+ mix->qos_dropped);
+ gst_element_post_message (GST_ELEMENT_CAST (mix), msg);
+
+ ret = GST_FLOW_OK;
+ }
+
+ gst_segment_set_last_stop (&mix->segment, GST_FORMAT_TIME, output_end_time);
+ mix->nframes++;
+
+ GST_VIDEO_MIXER2_UNLOCK (mix);
+ if (outbuf) {
+ GST_LOG_OBJECT (mix,
+ "Pushing buffer with ts %" GST_TIME_FORMAT " and duration %"
+ GST_TIME_FORMAT, GST_TIME_ARGS (GST_BUFFER_TIMESTAMP (outbuf)),
+ GST_TIME_ARGS (GST_BUFFER_DURATION (outbuf)));
+ ret = gst_pad_push (mix->srcpad, outbuf);
+ }
+ GST_VIDEO_MIXER2_LOCK (mix);
+
+done:
+ GST_VIDEO_MIXER2_UNLOCK (mix);
+
+ return ret;
+}
+
+static GstCaps *
+gst_videomixer2_src_getcaps (GstPad * pad)
+{
+ GstVideoMixer2 *mix = GST_VIDEO_MIXER2 (gst_pad_get_parent (pad));
+ GstCaps *caps;
+ GstStructure *s;
+ gint n;
+
+ if (mix->format != GST_VIDEO_FORMAT_UNKNOWN) {
+ caps = gst_caps_copy (GST_PAD_CAPS (mix->srcpad));
+ } else {
+ caps = gst_caps_copy (gst_pad_get_pad_template_caps (mix->srcpad));
+ }
+
+ n = gst_caps_get_size (caps) - 1;
+ for (; n >= 0; n--) {
+ s = gst_caps_get_structure (caps, n);
+ gst_structure_set (s, "width", GST_TYPE_INT_RANGE, 1, G_MAXINT,
+ "height", GST_TYPE_INT_RANGE, 1, G_MAXINT, NULL);
+ if (mix->fps_d != 0) {
+ gst_structure_set (s,
+ "framerate", GST_TYPE_FRACTION_RANGE, 0, 1, G_MAXINT, 1, NULL);
+ }
+ }
+
+ gst_object_unref (mix);
+
+ return caps;
+}
+
+static gboolean
+gst_videomixer2_query_duration (GstVideoMixer2 * mix, GstQuery * query)
+{
+ gint64 max;
+ gboolean res;
+ GstFormat format;
+ GstIterator *it;
+ gboolean done;
+
+ /* parse format */
+ gst_query_parse_duration (query, &format, NULL);
+
+ max = -1;
+ res = TRUE;
+ done = FALSE;
+
+ /* Take maximum of all durations */
+ it = gst_element_iterate_sink_pads (GST_ELEMENT_CAST (mix));
+ while (!done) {
+ GstIteratorResult ires;
+ gpointer item;
+
+ ires = gst_iterator_next (it, &item);
+ switch (ires) {
+ case GST_ITERATOR_DONE:
+ done = TRUE;
+ break;
+ case GST_ITERATOR_OK:
+ {
+ GstPad *pad = GST_PAD_CAST (item);
+ gint64 duration;
+
+ /* ask sink peer for duration */
+ res &= gst_pad_query_peer_duration (pad, &format, &duration);
+ /* take max from all valid return values */
+ if (res) {
+ /* valid unknown length, stop searching */
+ if (duration == -1) {
+ max = duration;
+ done = TRUE;
+ }
+ /* else see if bigger than current max */
+ else if (duration > max)
+ max = duration;
+ }
+ gst_object_unref (pad);
+ break;
+ }
+ case GST_ITERATOR_RESYNC:
+ max = -1;
+ res = TRUE;
+ gst_iterator_resync (it);
+ break;
+ default:
+ res = FALSE;
+ done = TRUE;
+ break;
+ }
+ }
+ gst_iterator_free (it);
+
+ if (res) {
+ /* and store the max */
+ GST_DEBUG_OBJECT (mix, "Total duration in format %s: %"
+ GST_TIME_FORMAT, gst_format_get_name (format), GST_TIME_ARGS (max));
+ gst_query_set_duration (query, format, max);
+ }
+
+ return res;
+}
+
+static gboolean
+gst_videomixer2_query_latency (GstVideoMixer2 * mix, GstQuery * query)
+{
+ GstClockTime min, max;
+ gboolean live;
+ gboolean res;
+ GstIterator *it;
+ gboolean done;
+
+ res = TRUE;
+ done = FALSE;
+ live = FALSE;
+ min = 0;
+ max = GST_CLOCK_TIME_NONE;
+
+ /* Take maximum of all latency values */
+ it = gst_element_iterate_sink_pads (GST_ELEMENT_CAST (mix));
+ while (!done) {
+ GstIteratorResult ires;
+ gpointer item;
+
+ ires = gst_iterator_next (it, &item);
+ switch (ires) {
+ case GST_ITERATOR_DONE:
+ done = TRUE;
+ break;
+ case GST_ITERATOR_OK:
+ {
+ GstPad *pad = GST_PAD_CAST (item);
+ GstQuery *peerquery;
+ GstClockTime min_cur, max_cur;
+ gboolean live_cur;
+
+ peerquery = gst_query_new_latency ();
+
+ /* Ask peer for latency */
+ res &= gst_pad_peer_query (pad, peerquery);
+
+ /* take max from all valid return values */
+ if (res) {
+ gst_query_parse_latency (peerquery, &live_cur, &min_cur, &max_cur);
+
+ if (min_cur > min)
+ min = min_cur;
+
+ if (max_cur != GST_CLOCK_TIME_NONE &&
+ ((max != GST_CLOCK_TIME_NONE && max_cur > max) ||
+ (max == GST_CLOCK_TIME_NONE)))
+ max = max_cur;
+
+ live = live || live_cur;
+ }
+
+ gst_query_unref (peerquery);
+ gst_object_unref (pad);
+ break;
+ }
+ case GST_ITERATOR_RESYNC:
+ live = FALSE;
+ min = 0;
+ max = GST_CLOCK_TIME_NONE;
+ res = TRUE;
+ gst_iterator_resync (it);
+ break;
+ default:
+ res = FALSE;
+ done = TRUE;
+ break;
+ }
+ }
+ gst_iterator_free (it);
+
+ if (res) {
+ /* store the results */
+ GST_DEBUG_OBJECT (mix, "Calculated total latency: live %s, min %"
+ GST_TIME_FORMAT ", max %" GST_TIME_FORMAT,
+ (live ? "yes" : "no"), GST_TIME_ARGS (min), GST_TIME_ARGS (max));
+ gst_query_set_latency (query, live, min, max);
+ }
+
+ return res;
+}
+
+static gboolean
+gst_videomixer2_src_query (GstPad * pad, GstQuery * query)
+{
+ GstVideoMixer2 *mix = GST_VIDEO_MIXER2 (gst_pad_get_parent (pad));
+ gboolean res = FALSE;
+
+ switch (GST_QUERY_TYPE (query)) {
+ case GST_QUERY_POSITION:
+ {
+ GstFormat format;
+
+ gst_query_parse_position (query, &format, NULL);
+
+ switch (format) {
+ case GST_FORMAT_TIME:
+ gst_query_set_position (query, format,
+ gst_segment_to_stream_time (&mix->segment, GST_FORMAT_TIME,
+ mix->segment.last_stop));
+ res = TRUE;
+ break;
+ default:
+ break;
+ }
+ break;
+ }
+ case GST_QUERY_DURATION:
+ res = gst_videomixer2_query_duration (mix, query);
+ break;
+ case GST_QUERY_LATENCY:
+ res = gst_videomixer2_query_latency (mix, query);
+ break;
+ default:
+ /* FIXME, needs a custom query handler because we have multiple
+ * sinkpads */
+ res = FALSE;
+ gst_query_unref (query);
+ break;
+ }
+
+ gst_object_unref (mix);
+ return res;
+}
+
+static gboolean
+gst_videomixer2_src_event (GstPad * pad, GstEvent * event)
+{
+ GstVideoMixer2 *mix = GST_VIDEO_MIXER2 (gst_pad_get_parent (pad));
+ gboolean result;
+
+ switch (GST_EVENT_TYPE (event)) {
+ case GST_EVENT_QOS:{
+ GstClockTimeDiff diff;
+ GstClockTime timestamp;
+ gdouble proportion;
+
+ gst_event_parse_qos (event, &proportion, &diff, ×tamp);
+
+ gst_videomixer2_update_qos (mix, proportion, diff, timestamp);
+
+ result = gst_videomixer2_push_sink_event (mix, event);
+ break;
+ }
+ case GST_EVENT_SEEK:
+ {
+ gdouble rate;
+ GstFormat fmt;
+ GstSeekFlags flags;
+ GstSeekType start_type, stop_type;
+ gint64 start, stop;
+ GSList *l;
+ gdouble abs_rate;
+
+ /* parse the seek parameters */
+ gst_event_parse_seek (event, &rate, &fmt, &flags, &start_type,
+ &start, &stop_type, &stop);
+
+ if (rate <= 0.0) {
+ GST_ERROR_OBJECT (mix, "Negative rates not supported yet");
+ result = FALSE;
+ gst_event_unref (event);
+ break;
+ }
+
+ GST_DEBUG_OBJECT (mix, "Handling SEEK event");
+
+ /* check if we are flushing */
+ if (flags & GST_SEEK_FLAG_FLUSH) {
+ /* flushing seek, start flush downstream, the flush will be done
+ * when all pads received a FLUSH_STOP. */
+ gst_pad_push_event (mix->srcpad, gst_event_new_flush_start ());
+
+ /* make sure we accept nothing anymore and return WRONG_STATE */
+ gst_collect_pads2_set_flushing (mix->collect, TRUE);
+ }
+
+ /* now wait for the collected to be finished and mark a new
+ * segment */
+ GST_COLLECT_PADS2_STREAM_LOCK (mix->collect);
+
+ abs_rate = ABS (rate);
+
+ GST_VIDEO_MIXER2_LOCK (mix);
+ for (l = mix->sinkpads; l; l = l->next) {
+ GstVideoMixer2Pad *p = l->data;
+
+ if (flags & GST_SEEK_FLAG_FLUSH) {
+ gst_buffer_replace (&p->mixcol->buffer, NULL);
+ p->mixcol->start_time = p->mixcol->end_time = -1;
+ continue;
+ }
+
+ /* Convert to the output segment rate */
+ if (mix->segment.abs_rate != abs_rate) {
+ if (mix->segment.abs_rate != 1.0 && p->mixcol->buffer) {
+ p->mixcol->start_time /= mix->segment.abs_rate;
+ p->mixcol->end_time /= mix->segment.abs_rate;
+ }
+ if (abs_rate != 1.0 && p->mixcol->buffer) {
+ p->mixcol->start_time *= abs_rate;
+ p->mixcol->end_time *= abs_rate;
+ }
+ }
+ }
+ GST_VIDEO_MIXER2_UNLOCK (mix);
+
+ gst_segment_set_seek (&mix->segment, rate, fmt, flags, start_type, start,
+ stop_type, stop, NULL);
+ mix->segment.last_stop = -1;
+ mix->ts_offset = 0;
+ mix->nframes = 0;
+ mix->newseg_pending = TRUE;
+
+ if (flags & GST_SEEK_FLAG_FLUSH) {
+ gst_collect_pads2_set_flushing (mix->collect, FALSE);
+
+ /* we can't send FLUSH_STOP here since upstream could start pushing data
+ * after we unlock mix->collect.
+ * We set flush_stop_pending to TRUE instead and send FLUSH_STOP after
+ * forwarding the seek upstream or from gst_videomixer_collected,
+ * whichever happens first.
+ */
+ mix->flush_stop_pending = TRUE;
+ }
+
+ GST_COLLECT_PADS2_STREAM_UNLOCK (mix->collect);
+
+ gst_videomixer2_reset_qos (mix);
+
+ result = gst_videomixer2_push_sink_event (mix, event);
+
+ if (g_atomic_int_compare_and_exchange (&mix->flush_stop_pending, TRUE,
+ FALSE)) {
+ GST_DEBUG_OBJECT (mix, "pending flush stop");
+ gst_pad_push_event (mix->srcpad, gst_event_new_flush_stop ());
+ }
+
+ break;
+ }
+ case GST_EVENT_NAVIGATION:
+ /* navigation is rather pointless. */
+ result = FALSE;
+ gst_event_unref (event);
+ break;
+ default:
+ /* just forward the rest for now */
+ result = gst_videomixer2_push_sink_event (mix, event);
+ break;
+ }
+ gst_object_unref (mix);
+
+ return result;
+}
+
+static gboolean
+gst_videomixer2_src_setcaps (GstPad * pad, GstCaps * caps)
+{
+ GstVideoMixer2 *mix = GST_VIDEO_MIXER2 (gst_pad_get_parent_element (pad));
+ gboolean ret = FALSE;
+ GstVideoFormat fmt;
+ gint width, height;
+ gint fps_n, fps_d;
+ gint par_n, par_d;
+
+ GST_INFO_OBJECT (pad, "set src caps: %" GST_PTR_FORMAT, caps);
+
+ mix->blend = NULL;
+ mix->fill_checker = NULL;
+ mix->fill_color = NULL;
+
+ if (!gst_video_format_parse_caps (caps, &fmt, &width, &height) ||
+ !gst_video_parse_caps_framerate (caps, &fps_n, &fps_d) ||
+ !gst_video_parse_caps_pixel_aspect_ratio (caps, &par_n, &par_d))
+ goto done;
+
+ GST_VIDEO_MIXER2_LOCK (mix);
+
+ if (mix->fps_n != fps_n || mix->fps_d != fps_d) {
+ if (mix->segment.last_stop != -1) {
+ mix->ts_offset = mix->segment.last_stop - mix->segment.start;
+ mix->nframes = 0;
+ }
+ gst_videomixer2_reset_qos (mix);
+ }
+
+ mix->format = fmt;
+ mix->width = width;
+ mix->height = height;
+ mix->fps_n = fps_n;
+ mix->fps_d = fps_d;
+ mix->par_n = par_n;
+ mix->par_d = par_d;
+
+ switch (mix->format) {
+ case GST_VIDEO_FORMAT_AYUV:
+ mix->blend = gst_video_mixer_blend_ayuv;
+ mix->fill_checker = gst_video_mixer_fill_checker_ayuv;
+ mix->fill_color = gst_video_mixer_fill_color_ayuv;
+ ret = TRUE;
+ break;
+ case GST_VIDEO_FORMAT_ARGB:
+ mix->blend = gst_video_mixer_blend_argb;
+ mix->fill_checker = gst_video_mixer_fill_checker_argb;
+ mix->fill_color = gst_video_mixer_fill_color_argb;
+ ret = TRUE;
+ break;
+ case GST_VIDEO_FORMAT_BGRA:
+ mix->blend = gst_video_mixer_blend_bgra;
+ mix->fill_checker = gst_video_mixer_fill_checker_bgra;
+ mix->fill_color = gst_video_mixer_fill_color_bgra;
+ ret = TRUE;
+ break;
+ case GST_VIDEO_FORMAT_ABGR:
+ mix->blend = gst_video_mixer_blend_abgr;
+ mix->fill_checker = gst_video_mixer_fill_checker_abgr;
+ mix->fill_color = gst_video_mixer_fill_color_abgr;
+ ret = TRUE;
+ break;
+ case GST_VIDEO_FORMAT_RGBA:
+ mix->blend = gst_video_mixer_blend_rgba;
+ mix->fill_checker = gst_video_mixer_fill_checker_rgba;
+ mix->fill_color = gst_video_mixer_fill_color_rgba;
+ ret = TRUE;
+ break;
+ case GST_VIDEO_FORMAT_Y444:
+ mix->blend = gst_video_mixer_blend_y444;
+ mix->fill_checker = gst_video_mixer_fill_checker_y444;
+ mix->fill_color = gst_video_mixer_fill_color_y444;
+ ret = TRUE;
+ break;
+ case GST_VIDEO_FORMAT_Y42B:
+ mix->blend = gst_video_mixer_blend_y42b;
+ mix->fill_checker = gst_video_mixer_fill_checker_y42b;
+ mix->fill_color = gst_video_mixer_fill_color_y42b;
+ ret = TRUE;
+ break;
+ case GST_VIDEO_FORMAT_YUY2:
+ mix->blend = gst_video_mixer_blend_yuy2;
+ mix->fill_checker = gst_video_mixer_fill_checker_yuy2;
+ mix->fill_color = gst_video_mixer_fill_color_yuy2;
+ ret = TRUE;
+ break;
+ case GST_VIDEO_FORMAT_UYVY:
+ mix->blend = gst_video_mixer_blend_uyvy;
+ mix->fill_checker = gst_video_mixer_fill_checker_uyvy;
+ mix->fill_color = gst_video_mixer_fill_color_uyvy;
+ ret = TRUE;
+ break;
+ case GST_VIDEO_FORMAT_YVYU:
+ mix->blend = gst_video_mixer_blend_yvyu;
+ mix->fill_checker = gst_video_mixer_fill_checker_yvyu;
+ mix->fill_color = gst_video_mixer_fill_color_yvyu;
+ ret = TRUE;
+ break;
+ case GST_VIDEO_FORMAT_I420:
+ mix->blend = gst_video_mixer_blend_i420;
+ mix->fill_checker = gst_video_mixer_fill_checker_i420;
+ mix->fill_color = gst_video_mixer_fill_color_i420;
+ ret = TRUE;
+ break;
+ case GST_VIDEO_FORMAT_YV12:
+ mix->blend = gst_video_mixer_blend_yv12;
+ mix->fill_checker = gst_video_mixer_fill_checker_yv12;
+ mix->fill_color = gst_video_mixer_fill_color_yv12;
+ ret = TRUE;
+ break;
+ case GST_VIDEO_FORMAT_Y41B:
+ mix->blend = gst_video_mixer_blend_y41b;
+ mix->fill_checker = gst_video_mixer_fill_checker_y41b;
+ mix->fill_color = gst_video_mixer_fill_color_y41b;
+ ret = TRUE;
+ break;
+ case GST_VIDEO_FORMAT_RGB:
+ mix->blend = gst_video_mixer_blend_rgb;
+ mix->fill_checker = gst_video_mixer_fill_checker_rgb;
+ mix->fill_color = gst_video_mixer_fill_color_rgb;
+ ret = TRUE;
+ break;
+ case GST_VIDEO_FORMAT_BGR:
+ mix->blend = gst_video_mixer_blend_bgr;
+ mix->fill_checker = gst_video_mixer_fill_checker_bgr;
+ mix->fill_color = gst_video_mixer_fill_color_bgr;
+ ret = TRUE;
+ break;
+ case GST_VIDEO_FORMAT_xRGB:
+ mix->blend = gst_video_mixer_blend_xrgb;
+ mix->fill_checker = gst_video_mixer_fill_checker_xrgb;
+ mix->fill_color = gst_video_mixer_fill_color_xrgb;
+ ret = TRUE;
+ break;
+ case GST_VIDEO_FORMAT_xBGR:
+ mix->blend = gst_video_mixer_blend_xbgr;
+ mix->fill_checker = gst_video_mixer_fill_checker_xbgr;
+ mix->fill_color = gst_video_mixer_fill_color_xbgr;
+ ret = TRUE;
+ break;
+ case GST_VIDEO_FORMAT_RGBx:
+ mix->blend = gst_video_mixer_blend_rgbx;
+ mix->fill_checker = gst_video_mixer_fill_checker_rgbx;
+ mix->fill_color = gst_video_mixer_fill_color_rgbx;
+ ret = TRUE;
+ break;
+ case GST_VIDEO_FORMAT_BGRx:
+ mix->blend = gst_video_mixer_blend_bgrx;
+ mix->fill_checker = gst_video_mixer_fill_checker_bgrx;
+ mix->fill_color = gst_video_mixer_fill_color_bgrx;
+ ret = TRUE;
+ break;
+ default:
+ break;
+ }
+ GST_VIDEO_MIXER2_UNLOCK (mix);
+
+done:
+ gst_object_unref (mix);
+
+ return ret;
+}
+
+static GstFlowReturn
+gst_videomixer2_sink_prepare_buffer (GstCollectPads2 * pads,
+ GstCollectData2 * data, GstBuffer * buf, GstVideoMixer2 * mix)
+{
+ GstVideoMixer2Pad *pad = GST_VIDEO_MIXER2_PAD (data->pad);
+ GstVideoMixer2Collect *mixcol = pad->mixcol;
+ GstClockTime start_time, end_time;
+ gint64 last_stop;
+
+ start_time = GST_BUFFER_TIMESTAMP (buf);
+ if (start_time == -1) {
+ GST_ERROR_OBJECT (pad, "Timestamped buffers required!");
+ return GST_FLOW_ERROR;
+ }
+
+ end_time = GST_BUFFER_DURATION (buf);
+ if (end_time == -1)
+ end_time = gst_util_uint64_scale_int (GST_SECOND, pad->fps_d, pad->fps_n);
+ if (end_time == -1)
+ return GST_FLOW_OK;
+
+ start_time = MAX (start_time, mixcol->collect.segment.start);
+ start_time =
+ gst_segment_to_running_time (&mixcol->collect.segment,
+ GST_FORMAT_TIME, start_time);
+
+ end_time += GST_BUFFER_TIMESTAMP (buf);
+ if (mixcol->collect.segment.stop != -1)
+ end_time = MIN (end_time, mixcol->collect.segment.stop);
+ end_time =
+ gst_segment_to_running_time (&mixcol->collect.segment,
+ GST_FORMAT_TIME, end_time);
+
+ /* Convert to the output segment rate */
+ if (mix->segment.abs_rate != 1.0) {
+ start_time *= mix->segment.abs_rate;
+ end_time *= mix->segment.abs_rate;
+ }
+
+ last_stop = mix->segment.last_stop;
+ if (mix->segment.last_stop == -1)
+ last_stop = mix->segment.start;
+
+ if (mixcol->buffer != NULL && end_time < mixcol->end_time) {
+ return GST_COLLECT_PADS2_FLOW_DROP;
+ }
+
+ return GST_FLOW_OK;
+}
+
+static gboolean
+gst_videomixer2_sink_event (GstCollectPads2 * pads, GstCollectData2 * cdata,
+ GstEvent * event, GstVideoMixer2 * mix)
+{
+ GstVideoMixer2Pad *pad = GST_VIDEO_MIXER2_PAD (cdata->pad);
+ gboolean ret = TRUE;
+
+ GST_DEBUG_OBJECT (pad, "Got %s event on pad %s:%s",
+ GST_EVENT_TYPE_NAME (event), GST_DEBUG_PAD_NAME (pad));
+
+ // return FALSE => event will be forwarded
+ switch (GST_EVENT_TYPE (event)) {
+ case GST_EVENT_NEWSEGMENT:{
+ GstFormat fmt;
+ gst_event_parse_new_segment (event, NULL, NULL, &fmt, NULL, NULL, NULL);
+
+ g_assert (fmt == GST_FORMAT_TIME);
+ /* eat NEWSEGMENT events, collectpads2 unrefs the event */
+ ret = FALSE;
+ break;
+ }
+ case GST_EVENT_FLUSH_STOP:
+ mix->newseg_pending = TRUE;
+ mix->flush_stop_pending = FALSE;
+ gst_videomixer2_reset_qos (mix);
+ gst_buffer_replace (&pad->mixcol->buffer, NULL);
+ pad->mixcol->start_time = -1;
+ pad->mixcol->end_time = -1;
+
+ gst_segment_init (&mix->segment, GST_FORMAT_TIME);
+ mix->segment.last_stop = -1;
+ mix->ts_offset = 0;
+ mix->nframes = 0;
+
+ gst_pad_push_event (mix->srcpad, event);
+ break;
+ default:
+ gst_pad_push_event (mix->srcpad, event);
+ break;
+ }
+
+ return ret;
+}
+
+static gboolean
+forward_event_func (GstPad * pad, GValue * ret, GstEvent * event)
+{
+ gst_event_ref (event);
+ GST_LOG_OBJECT (pad, "About to send event %s", GST_EVENT_TYPE_NAME (event));
+ if (!gst_pad_push_event (pad, event)) {
+ g_value_set_boolean (ret, FALSE);
+ GST_WARNING_OBJECT (pad, "Sending event %p (%s) failed.",
+ event, GST_EVENT_TYPE_NAME (event));
+ } else {
+ GST_LOG_OBJECT (pad, "Sent event %p (%s).",
+ event, GST_EVENT_TYPE_NAME (event));
+ }
+ gst_object_unref (pad);
+ return TRUE;
+}
+
+static gboolean
+gst_videomixer2_push_sink_event (GstVideoMixer2 * mix, GstEvent * event)
+{
+ GstIterator *it;
+ GValue vret = { 0 };
+
+ GST_LOG_OBJECT (mix, "Forwarding event %p (%s)", event,
+ GST_EVENT_TYPE_NAME (event));
+
+ g_value_init (&vret, G_TYPE_BOOLEAN);
+ g_value_set_boolean (&vret, TRUE);
+ it = gst_element_iterate_sink_pads (GST_ELEMENT_CAST (mix));
+ gst_iterator_fold (it, (GstIteratorFoldFunction) forward_event_func, &vret,
+ event);
+ gst_iterator_free (it);
+ gst_event_unref (event);
+
+ return g_value_get_boolean (&vret);
+}
+
+/* GstElement vmethods */
+static GstStateChangeReturn
+gst_videomixer2_change_state (GstElement * element, GstStateChange transition)
+{
+ GstVideoMixer2 *mix = GST_VIDEO_MIXER2 (element);
+ GstStateChangeReturn ret;
+
+ switch (transition) {
+ case GST_STATE_CHANGE_READY_TO_PAUSED:
+ GST_LOG_OBJECT (mix, "starting collectpads");
+ gst_collect_pads2_start (mix->collect);
+ break;
+ case GST_STATE_CHANGE_PAUSED_TO_READY:
+ GST_LOG_OBJECT (mix, "stopping collectpads");
+ gst_collect_pads2_stop (mix->collect);
+ break;
+ default:
+ break;
+ }
+
+ ret = GST_ELEMENT_CLASS (parent_class)->change_state (element, transition);
+
+ switch (transition) {
+ case GST_STATE_CHANGE_PAUSED_TO_READY:
+ gst_videomixer2_reset (mix);
+ break;
+ default:
+ break;
+ }
+
+ return ret;
+}
+
+static GstPad *
+gst_videomixer2_request_new_pad (GstElement * element,
+ GstPadTemplate * templ, const gchar * req_name)
+{
+ GstVideoMixer2 *mix;
+ GstVideoMixer2Pad *mixpad;
+ GstElementClass *klass = GST_ELEMENT_GET_CLASS (element);
+
+ mix = GST_VIDEO_MIXER2 (element);
+
+ if (templ == gst_element_class_get_pad_template (klass, "sink_%d")) {
+ gint serial = 0;
+ gchar *name = NULL;
+ GstVideoMixer2Collect *mixcol = NULL;
+
+ GST_VIDEO_MIXER2_LOCK (mix);
+ if (req_name == NULL || strlen (req_name) < 6
+ || !g_str_has_prefix (req_name, "sink_")) {
+ /* no name given when requesting the pad, use next available int */
+ serial = mix->next_sinkpad++;
+ } else {
+ /* parse serial number from requested padname */
+ serial = g_ascii_strtoull (&req_name[5], NULL, 10);
+ if (serial >= mix->next_sinkpad)
+ mix->next_sinkpad = serial + 1;
+ }
+ /* create new pad with the name */
+ name = g_strdup_printf ("sink_%d", serial);
+ mixpad = g_object_new (GST_TYPE_VIDEO_MIXER2_PAD, "name", name, "direction",
+ templ->direction, "template", templ, NULL);
+ g_free (name);
+
+ mixpad->zorder = mix->numpads;
+ mixpad->xpos = DEFAULT_PAD_XPOS;
+ mixpad->ypos = DEFAULT_PAD_YPOS;
+ mixpad->alpha = DEFAULT_PAD_ALPHA;
+
+ mixcol = (GstVideoMixer2Collect *)
+ gst_collect_pads2_add_pad_full (mix->collect, GST_PAD (mixpad),
+ sizeof (GstVideoMixer2Collect),
+ (GstCollectData2DestroyNotify) gst_videomixer2_collect_free, TRUE);
+
+ /* Keep track of each other */
+ mixcol->mixpad = mixpad;
+ mixpad->mixcol = mixcol;
+
+ mixcol->start_time = -1;
+ mixcol->end_time = -1;
+
+ /* Keep an internal list of mixpads for zordering */
+ mix->sinkpads = g_slist_append (mix->sinkpads, mixpad);
+ mix->numpads++;
+ GST_VIDEO_MIXER2_UNLOCK (mix);
+ } else {
+ return NULL;
+ }
+
+ GST_DEBUG_OBJECT (element, "Adding pad %s", GST_PAD_NAME (mixpad));
+
+ /* add the pad to the element */
+ gst_element_add_pad (element, GST_PAD (mixpad));
+ gst_child_proxy_child_added (GST_OBJECT (mix), GST_OBJECT (mixpad));
+
+ return GST_PAD (mixpad);
+}
+
+static void
+gst_videomixer2_release_pad (GstElement * element, GstPad * pad)
+{
+ GstVideoMixer2 *mix = NULL;
+ GstVideoMixer2Pad *mixpad;
+ gboolean update_caps;
+
+ mix = GST_VIDEO_MIXER2 (element);
+
+ GST_VIDEO_MIXER2_LOCK (mix);
+ if (G_UNLIKELY (g_slist_find (mix->sinkpads, pad) == NULL)) {
+ g_warning ("Unknown pad %s", GST_PAD_NAME (pad));
+ goto error;
+ }
+
+ mixpad = GST_VIDEO_MIXER2_PAD (pad);
+
+ mix->sinkpads = g_slist_remove (mix->sinkpads, pad);
+ gst_child_proxy_child_removed (GST_OBJECT (mix), GST_OBJECT (mixpad));
+ mix->numpads--;
+
+ update_caps = mix->format != GST_VIDEO_FORMAT_UNKNOWN;
+ GST_VIDEO_MIXER2_UNLOCK (mix);
+
+ gst_collect_pads2_remove_pad (mix->collect, pad);
+
+ if (update_caps)
+ gst_videomixer2_update_src_caps (mix);
+
+ gst_element_remove_pad (element, pad);
+ return;
+error:
+ GST_VIDEO_MIXER2_UNLOCK (mix);
+}
+
+/* GObject vmethods */
+static void
+gst_videomixer2_finalize (GObject * o)
+{
+ GstVideoMixer2 *mix = GST_VIDEO_MIXER2 (o);
+
+ gst_object_unref (mix->collect);
+ g_mutex_free (mix->lock);
+
+ G_OBJECT_CLASS (parent_class)->finalize (o);
+}
+
+static void
+gst_videomixer2_get_property (GObject * object,
+ guint prop_id, GValue * value, GParamSpec * pspec)
+{
+ GstVideoMixer2 *mix = GST_VIDEO_MIXER2 (object);
+
+ switch (prop_id) {
+ case PROP_BACKGROUND:
+ g_value_set_enum (value, mix->background);
+ break;
+ default:
+ G_OBJECT_WARN_INVALID_PROPERTY_ID (object, prop_id, pspec);
+ break;
+ }
+}
+
+static void
+gst_videomixer2_set_property (GObject * object,
+ guint prop_id, const GValue * value, GParamSpec * pspec)
+{
+ GstVideoMixer2 *mix = GST_VIDEO_MIXER2 (object);
+
+ switch (prop_id) {
+ case PROP_BACKGROUND:
+ mix->background = g_value_get_enum (value);
+ break;
+ default:
+ G_OBJECT_WARN_INVALID_PROPERTY_ID (object, prop_id, pspec);
+ break;
+ }
+}
+
+/* GstChildProxy implementation */
+static GstObject *
+gst_videomixer2_child_proxy_get_child_by_index (GstChildProxy * child_proxy,
+ guint index)
+{
+ GstVideoMixer2 *mix = GST_VIDEO_MIXER2 (child_proxy);
+ GstObject *obj;
+
+ GST_VIDEO_MIXER2_LOCK (mix);
+ if ((obj = g_slist_nth_data (mix->sinkpads, index)))
+ gst_object_ref (obj);
+ GST_VIDEO_MIXER2_UNLOCK (mix);
+ return obj;
+}
+
+static guint
+gst_videomixer2_child_proxy_get_children_count (GstChildProxy * child_proxy)
+{
+ guint count = 0;
+ GstVideoMixer2 *mix = GST_VIDEO_MIXER2 (child_proxy);
+
+ GST_VIDEO_MIXER2_LOCK (mix);
+ count = mix->numpads;
+ GST_VIDEO_MIXER2_UNLOCK (mix);
+ GST_INFO_OBJECT (mix, "Children Count: %d", count);
+ return count;
+}
+
+static void
+gst_videomixer2_child_proxy_init (gpointer g_iface, gpointer iface_data)
+{
+ GstChildProxyInterface *iface = g_iface;
+
+ GST_INFO ("intializing child proxy interface");
+ iface->get_child_by_index = gst_videomixer2_child_proxy_get_child_by_index;
+ iface->get_children_count = gst_videomixer2_child_proxy_get_children_count;
+}
+
+/* GObject boilerplate */
+static void
+gst_videomixer2_base_init (gpointer g_class)
+{
+ GstElementClass *element_class = GST_ELEMENT_CLASS (g_class);
+
+ gst_element_class_add_pad_template (element_class,
+ gst_static_pad_template_get (&src_factory));
+ gst_element_class_add_pad_template (element_class,
+ gst_static_pad_template_get (&sink_factory));
+
+ gst_element_class_set_details_simple (element_class, "Video mixer 2",
+ "Filter/Editor/Video",
+ "Mix multiple video streams", "Wim Taymans <wim@fluendo.com>, "
+ "Sebastian Dröge <sebastian.droege@collabora.co.uk>");
+}
+
+static void
+gst_videomixer2_class_init (GstVideoMixer2Class * klass)
+{
+ GObjectClass *gobject_class = (GObjectClass *) klass;
+ GstElementClass *gstelement_class = (GstElementClass *) klass;
+
+ gobject_class->finalize = gst_videomixer2_finalize;
+
+ gobject_class->get_property = gst_videomixer2_get_property;
+ gobject_class->set_property = gst_videomixer2_set_property;
+
+ g_object_class_install_property (gobject_class, PROP_BACKGROUND,
+ g_param_spec_enum ("background", "Background", "Background type",
+ GST_TYPE_VIDEO_MIXER2_BACKGROUND,
+ DEFAULT_BACKGROUND, G_PARAM_READWRITE | G_PARAM_STATIC_STRINGS));
+
+ gstelement_class->request_new_pad =
+ GST_DEBUG_FUNCPTR (gst_videomixer2_request_new_pad);
+ gstelement_class->release_pad =
+ GST_DEBUG_FUNCPTR (gst_videomixer2_release_pad);
+ gstelement_class->change_state =
+ GST_DEBUG_FUNCPTR (gst_videomixer2_change_state);
+
+ /* Register the pad class */
+ (void) (GST_TYPE_VIDEO_MIXER2_PAD);
+ /* Register the background enum */
+ (void) (GST_TYPE_VIDEO_MIXER2_BACKGROUND);
+}
+
+static void
+gst_videomixer2_init (GstVideoMixer2 * mix, GstVideoMixer2Class * g_class)
+{
+ GstElementClass *klass = GST_ELEMENT_GET_CLASS (mix);
+
+ mix->srcpad =
+ gst_pad_new_from_template (gst_element_class_get_pad_template (klass,
+ "src"), "src");
+ gst_pad_set_getcaps_function (GST_PAD (mix->srcpad),
+ GST_DEBUG_FUNCPTR (gst_videomixer2_src_getcaps));
+ gst_pad_set_setcaps_function (GST_PAD (mix->srcpad),
+ GST_DEBUG_FUNCPTR (gst_videomixer2_src_setcaps));
+ gst_pad_set_query_function (GST_PAD (mix->srcpad),
+ GST_DEBUG_FUNCPTR (gst_videomixer2_src_query));
+ gst_pad_set_event_function (GST_PAD (mix->srcpad),
+ GST_DEBUG_FUNCPTR (gst_videomixer2_src_event));
+ gst_element_add_pad (GST_ELEMENT (mix), mix->srcpad);
+
+ mix->collect = gst_collect_pads2_new ();
+ mix->background = DEFAULT_BACKGROUND;
+
+ gst_collect_pads2_set_function (mix->collect,
+ (GstCollectPads2Function) GST_DEBUG_FUNCPTR (gst_videomixer2_collected),
+ mix);
+ gst_collect_pads2_set_event_function (mix->collect,
+ (GstCollectPads2EventFunction) gst_videomixer2_sink_event, mix);
+ gst_collect_pads2_set_prepare_buffer_function (mix->collect,
+ (GstCollectPads2BufferFunction) gst_videomixer2_sink_prepare_buffer, mix);
+
+ mix->lock = g_mutex_new ();
+ /* initialize variables */
+ gst_videomixer2_reset (mix);
+}
+
+/* Element registration */
+gboolean
+gst_videomixer2_register (GstPlugin * plugin)
+{
+ GST_DEBUG_CATEGORY_INIT (gst_videomixer2_debug, "videomixer2", 0,
+ "video mixer 2");
+
+ return gst_element_register (plugin, "videomixer2", GST_RANK_SECONDARY,
+ GST_TYPE_VIDEO_MIXER2);
+}
--- /dev/null
+/* Generic video mixer plugin
+ * Copyright (C) 2008 Wim Taymans <wim@fluendo.com>
+ * Copyright (C) 2010 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.
+ */
+
+#ifndef __GST_VIDEO_MIXER2_H__
+#define __GST_VIDEO_MIXER2_H__
+
+#include <gst/gst.h>
+#include <gst/video/video.h>
+
+#include "blend.h"
+#include "gstcollectpads2.h"
+
+G_BEGIN_DECLS
+
+#define GST_TYPE_VIDEO_MIXER2 (gst_videomixer2_get_type())
+#define GST_VIDEO_MIXER2(obj) \
+ (G_TYPE_CHECK_INSTANCE_CAST((obj),GST_TYPE_VIDEO_MIXER2, GstVideoMixer2))
+#define GST_VIDEO_MIXER2_CLASS(klass) \
+ (G_TYPE_CHECK_CLASS_CAST((klass),GST_TYPE_VIDEO_MIXER2, GstVideoMixer2Class))
+#define GST_IS_VIDEO_MIXER2(obj) \
+ (G_TYPE_CHECK_INSTANCE_TYPE((obj),GST_TYPE_VIDEO_MIXER2))
+#define GST_IS_VIDEO_MIXER2_CLASS(klass) \
+ (G_TYPE_CHECK_CLASS_TYPE((klass),GST_TYPE_VIDEO_MIXER2))
+
+typedef struct _GstVideoMixer2 GstVideoMixer2;
+typedef struct _GstVideoMixer2Class GstVideoMixer2Class;
+
+/**
+ * GstVideoMixer2Background:
+ * @VIDEO_MIXER2_BACKGROUND_CHECKER: checker pattern background
+ * @VIDEO_MIXER2_BACKGROUND_BLACK: solid color black background
+ * @VIDEO_MIXER2_BACKGROUND_WHITE: solid color white background
+ *
+ * The different backgrounds videomixer can blend over.
+ */
+typedef enum
+{
+ VIDEO_MIXER2_BACKGROUND_CHECKER,
+ VIDEO_MIXER2_BACKGROUND_BLACK,
+ VIDEO_MIXER2_BACKGROUND_WHITE
+}
+GstVideoMixer2Background;
+
+/**
+ * GstVideoMixer2:
+ *
+ * The opaque #GstVideoMixer2 structure.
+ */
+struct _GstVideoMixer2
+{
+ GstElement element;
+
+ /* pad */
+ GstPad *srcpad;
+
+ /* Lock to prevent the state to change while blending */
+ GMutex *lock;
+ /* Sink pads using Collect Pads 2*/
+ GstCollectPads2 *collect;
+
+ /* sinkpads, a GSList of GstVideoMixer2Pads */
+ GSList *sinkpads;
+ gint numpads;
+ /* Next available sinkpad index */
+ gint next_sinkpad;
+
+ /* Output caps */
+ GstVideoFormat format;
+ gint width, height;
+ gint fps_n;
+ gint fps_d;
+ gint par_n;
+ gint par_d;
+
+ gboolean newseg_pending;
+ gboolean flush_stop_pending;
+
+ GstVideoMixer2Background background;
+
+ /* Current downstream segment */
+ GstSegment segment;
+ GstClockTime ts_offset;
+ guint64 nframes;
+
+ /* QoS stuff */
+ gdouble proportion;
+ GstClockTime earliest_time;
+ guint64 qos_processed, qos_dropped;
+
+ BlendFunction blend;
+ FillCheckerFunction fill_checker;
+ FillColorFunction fill_color;
+};
+
+struct _GstVideoMixer2Class
+{
+ GstElementClass parent_class;
+};
+
+GType gst_videomixer2_get_type (void);
+gboolean gst_videomixer2_register (GstPlugin * plugin);
+
+G_END_DECLS
+#endif /* __GST_VIDEO_MIXER2_H__ */
projects / platform / upstream / gstreamer.git / commitdiff