From a0c4c4812cee5473f0bebd52495fccdab02c7717 Mon Sep 17 00:00:00 2001 From: Thomas Vander Stichele Date: Tue, 29 Nov 2005 19:12:30 +0000 Subject: CVS surgery + support to move base, check, and net out of gst and into libs/gst Original commit message from CVS: CVS surgery + support to move base, check, and net out of gst and into libs/gst --- gst/base/gstbasesink.c | 1583 ------------------------------------------------ 1 file changed, 1583 deletions(-) delete mode 100644 gst/base/gstbasesink.c (limited to 'gst/base/gstbasesink.c') diff --git a/gst/base/gstbasesink.c b/gst/base/gstbasesink.c deleted file mode 100644 index 2f143dd97b..0000000000 --- a/gst/base/gstbasesink.c +++ /dev/null @@ -1,1583 +0,0 @@ -/* GStreamer - * Copyright (C) 2005 Wim Taymans - * - * gstbasesink.c: Base class for sink elements - * - * 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:gstbasesink - * @short_description: Base class for sink elements - * @see_also: #GstBaseTransform, #GstBaseSource - * - * GstBaseSink is the base class for sink elements in GStreamer, such as - * xvimagesink or filesink. It is a layer on top of #GstElement that provides a - * simplified interface to plugin writers. GstBaseSink handles many details for - * you, for example preroll, clock synchronization, state changes, activation in - * push or pull mode, and queries. In most cases, when writing sink elements, - * there is no need to implement class methods from #GstElement or to set - * functions on pads, because the GstBaseSink infrastructure is sufficient. - * - * There is only support in GstBaseSink for one sink pad, which should be named - * "sink". A sink implementation (subclass of GstBaseSink) should install a pad - * template in its base_init function, like so: - * - * static void - * my_element_base_init (gpointer g_class) - * { - * GstElementClass *gstelement_class = GST_ELEMENT_CLASS (g_class); - * - * // sinktemplate should be a #GstStaticPadTemplate with direction - * // #GST_PAD_SINK and name "sink" - * gst_element_class_add_pad_template (gstelement_class, - * gst_static_pad_template_get (&sinktemplate)); - * // see #GstElementDetails - * gst_element_class_set_details (gstelement_class, &details); - * } - * - * - * The one method which all subclasses of GstBaseSink must implement is - * GstBaseSink::render. This method will be called... - * - * preroll() - * - * event(): mostly useful for file-like sinks (seeking or flushing) - * - * get_caps/set_caps/buffer_alloc - * - * start/stop for resource allocation - * - * unlock if you block on an fd, for example - * - * get_times i'm sure is for something :P - * - * provide example of textsink - * - * admonishment not to try to implement your own sink with prerolling... - * - * extending via subclassing, setting pad functions, gstelement vmethods. - */ - -#ifdef HAVE_CONFIG_H -# include "config.h" -#endif - -#include "gstbasesink.h" -#include -#include - -GST_DEBUG_CATEGORY_STATIC (gst_base_sink_debug); -#define GST_CAT_DEFAULT gst_base_sink_debug - -/* BaseSink signals and properties */ -enum -{ - /* FILL ME */ - SIGNAL_HANDOFF, - LAST_SIGNAL -}; - -#define DEFAULT_SIZE 1024 -#define DEFAULT_CAN_ACTIVATE_PULL FALSE /* fixme: enable me */ -#define DEFAULT_CAN_ACTIVATE_PUSH TRUE - -#define DEFAULT_SYNC TRUE - -enum -{ - PROP_0, - PROP_PREROLL_QUEUE_LEN, - PROP_SYNC -}; - -static GstElementClass *parent_class = NULL; - -static void gst_base_sink_base_init (gpointer g_class); -static void gst_base_sink_class_init (GstBaseSinkClass * klass); -static void gst_base_sink_init (GstBaseSink * trans, gpointer g_class); -static void gst_base_sink_finalize (GObject * object); - -GType -gst_base_sink_get_type (void) -{ - static GType base_sink_type = 0; - - if (!base_sink_type) { - static const GTypeInfo base_sink_info = { - sizeof (GstBaseSinkClass), - (GBaseInitFunc) gst_base_sink_base_init, - NULL, - (GClassInitFunc) gst_base_sink_class_init, - NULL, - NULL, - sizeof (GstBaseSink), - 0, - (GInstanceInitFunc) gst_base_sink_init, - }; - - base_sink_type = g_type_register_static (GST_TYPE_ELEMENT, - "GstBaseSink", &base_sink_info, G_TYPE_FLAG_ABSTRACT); - } - return base_sink_type; -} - -static void gst_base_sink_set_property (GObject * object, guint prop_id, - const GValue * value, GParamSpec * pspec); -static void gst_base_sink_get_property (GObject * object, guint prop_id, - GValue * value, GParamSpec * pspec); - -static gboolean gst_base_sink_send_event (GstElement * element, - GstEvent * event); -static gboolean gst_base_sink_query (GstElement * element, GstQuery * query); - -static GstCaps *gst_base_sink_get_caps (GstBaseSink * sink); -static gboolean gst_base_sink_set_caps (GstBaseSink * sink, GstCaps * caps); -static GstFlowReturn gst_base_sink_buffer_alloc (GstBaseSink * sink, - guint64 offset, guint size, GstCaps * caps, GstBuffer ** buf); -static void gst_base_sink_get_times (GstBaseSink * basesink, GstBuffer * buffer, - GstClockTime * start, GstClockTime * end); - -static GstStateChangeReturn gst_base_sink_change_state (GstElement * element, - GstStateChange transition); - -static GstFlowReturn gst_base_sink_chain (GstPad * pad, GstBuffer * buffer); -static void gst_base_sink_loop (GstPad * pad); -static gboolean gst_base_sink_activate (GstPad * pad); -static gboolean gst_base_sink_activate_push (GstPad * pad, gboolean active); -static gboolean gst_base_sink_activate_pull (GstPad * pad, gboolean active); -static gboolean gst_base_sink_event (GstPad * pad, GstEvent * event); -static inline GstFlowReturn gst_base_sink_handle_buffer (GstBaseSink * basesink, - GstBuffer * buf); -static inline gboolean gst_base_sink_handle_event (GstBaseSink * basesink, - GstEvent * event); - -static void -gst_base_sink_base_init (gpointer g_class) -{ - GST_DEBUG_CATEGORY_INIT (gst_base_sink_debug, "basesink", 0, - "basesink element"); -} - -static void -gst_base_sink_class_init (GstBaseSinkClass * klass) -{ - GObjectClass *gobject_class; - GstElementClass *gstelement_class; - - gobject_class = (GObjectClass *) klass; - gstelement_class = (GstElementClass *) klass; - - parent_class = g_type_class_ref (GST_TYPE_ELEMENT); - - gobject_class->finalize = GST_DEBUG_FUNCPTR (gst_base_sink_finalize); - gobject_class->set_property = GST_DEBUG_FUNCPTR (gst_base_sink_set_property); - gobject_class->get_property = GST_DEBUG_FUNCPTR (gst_base_sink_get_property); - - /* FIXME, this next value should be configured using an event from the - * upstream element */ - g_object_class_install_property (G_OBJECT_CLASS (klass), - PROP_PREROLL_QUEUE_LEN, - g_param_spec_uint ("preroll-queue-len", "preroll-queue-len", - "Number of buffers to queue during preroll", 0, G_MAXUINT, 0, - G_PARAM_READWRITE | G_PARAM_CONSTRUCT)); - g_object_class_install_property (G_OBJECT_CLASS (klass), PROP_SYNC, - g_param_spec_boolean ("sync", "Sync", "Sync on the clock", DEFAULT_SYNC, - G_PARAM_READWRITE)); - - gstelement_class->change_state = - GST_DEBUG_FUNCPTR (gst_base_sink_change_state); - gstelement_class->send_event = GST_DEBUG_FUNCPTR (gst_base_sink_send_event); - gstelement_class->query = GST_DEBUG_FUNCPTR (gst_base_sink_query); - - klass->get_caps = GST_DEBUG_FUNCPTR (gst_base_sink_get_caps); - klass->set_caps = GST_DEBUG_FUNCPTR (gst_base_sink_set_caps); - klass->buffer_alloc = GST_DEBUG_FUNCPTR (gst_base_sink_buffer_alloc); - klass->get_times = GST_DEBUG_FUNCPTR (gst_base_sink_get_times); -} - -static GstCaps * -gst_base_sink_pad_getcaps (GstPad * pad) -{ - GstBaseSinkClass *bclass; - GstBaseSink *bsink; - GstCaps *caps = NULL; - - bsink = GST_BASE_SINK (gst_pad_get_parent (pad)); - bclass = GST_BASE_SINK_GET_CLASS (bsink); - if (bclass->get_caps) - caps = bclass->get_caps (bsink); - - if (caps == NULL) { - GstPadTemplate *pad_template; - - pad_template = - gst_element_class_get_pad_template (GST_ELEMENT_CLASS (bclass), "sink"); - if (pad_template != NULL) { - caps = gst_caps_ref (gst_pad_template_get_caps (pad_template)); - } - } - gst_object_unref (bsink); - - return caps; -} - -static gboolean -gst_base_sink_pad_setcaps (GstPad * pad, GstCaps * caps) -{ - GstBaseSinkClass *bclass; - GstBaseSink *bsink; - gboolean res = FALSE; - - bsink = GST_BASE_SINK (gst_pad_get_parent (pad)); - bclass = GST_BASE_SINK_GET_CLASS (bsink); - - if (bclass->set_caps) - res = bclass->set_caps (bsink, caps); - - gst_object_unref (bsink); - - return res; -} - -static GstFlowReturn -gst_base_sink_pad_buffer_alloc (GstPad * pad, guint64 offset, guint size, - GstCaps * caps, GstBuffer ** buf) -{ - GstBaseSinkClass *bclass; - GstBaseSink *bsink; - GstFlowReturn result = GST_FLOW_OK; - - bsink = GST_BASE_SINK (gst_pad_get_parent (pad)); - bclass = GST_BASE_SINK_GET_CLASS (bsink); - - if (bclass->buffer_alloc) - result = bclass->buffer_alloc (bsink, offset, size, caps, buf); - else - *buf = NULL; /* fallback in gstpad.c will allocate generic buffer */ - - gst_object_unref (bsink); - - return result; -} - -static void -gst_base_sink_init (GstBaseSink * basesink, gpointer g_class) -{ - GstPadTemplate *pad_template; - - pad_template = - gst_element_class_get_pad_template (GST_ELEMENT_CLASS (g_class), "sink"); - g_return_if_fail (pad_template != NULL); - - basesink->sinkpad = gst_pad_new_from_template (pad_template, "sink"); - - gst_pad_set_getcaps_function (basesink->sinkpad, - GST_DEBUG_FUNCPTR (gst_base_sink_pad_getcaps)); - gst_pad_set_setcaps_function (basesink->sinkpad, - GST_DEBUG_FUNCPTR (gst_base_sink_pad_setcaps)); - gst_pad_set_bufferalloc_function (basesink->sinkpad, - GST_DEBUG_FUNCPTR (gst_base_sink_pad_buffer_alloc)); - gst_pad_set_activate_function (basesink->sinkpad, - GST_DEBUG_FUNCPTR (gst_base_sink_activate)); - gst_pad_set_activatepush_function (basesink->sinkpad, - GST_DEBUG_FUNCPTR (gst_base_sink_activate_push)); - gst_pad_set_activatepull_function (basesink->sinkpad, - GST_DEBUG_FUNCPTR (gst_base_sink_activate_pull)); - gst_pad_set_event_function (basesink->sinkpad, - GST_DEBUG_FUNCPTR (gst_base_sink_event)); - gst_pad_set_chain_function (basesink->sinkpad, - GST_DEBUG_FUNCPTR (gst_base_sink_chain)); - gst_element_add_pad (GST_ELEMENT (basesink), basesink->sinkpad); - - basesink->pad_mode = GST_ACTIVATE_NONE; - GST_PAD_TASK (basesink->sinkpad) = NULL; - basesink->preroll_queue = g_queue_new (); - - basesink->can_activate_push = DEFAULT_CAN_ACTIVATE_PUSH; - basesink->can_activate_pull = DEFAULT_CAN_ACTIVATE_PULL; - - basesink->sync = DEFAULT_SYNC; - - GST_OBJECT_FLAG_SET (basesink, GST_ELEMENT_IS_SINK); -} - -static void -gst_base_sink_finalize (GObject * object) -{ - GstBaseSink *basesink; - - basesink = GST_BASE_SINK (object); - - g_queue_free (basesink->preroll_queue); - - G_OBJECT_CLASS (parent_class)->finalize (object); -} - -static void -gst_base_sink_set_property (GObject * object, guint prop_id, - const GValue * value, GParamSpec * pspec) -{ - GstBaseSink *sink = GST_BASE_SINK (object); - - switch (prop_id) { - case PROP_PREROLL_QUEUE_LEN: - /* preroll lock necessary to serialize with finish_preroll */ - GST_PAD_PREROLL_LOCK (sink->sinkpad); - sink->preroll_queue_max_len = g_value_get_uint (value); - GST_PAD_PREROLL_UNLOCK (sink->sinkpad); - break; - case PROP_SYNC: - sink->sync = g_value_get_boolean (value); - break; - default: - G_OBJECT_WARN_INVALID_PROPERTY_ID (object, prop_id, pspec); - break; - } -} - -static void -gst_base_sink_get_property (GObject * object, guint prop_id, GValue * value, - GParamSpec * pspec) -{ - GstBaseSink *sink = GST_BASE_SINK (object); - - GST_OBJECT_LOCK (sink); - switch (prop_id) { - case PROP_PREROLL_QUEUE_LEN: - g_value_set_uint (value, sink->preroll_queue_max_len); - break; - case PROP_SYNC: - g_value_set_boolean (value, sink->sync); - break; - default: - G_OBJECT_WARN_INVALID_PROPERTY_ID (object, prop_id, pspec); - break; - } - GST_OBJECT_UNLOCK (sink); -} - -static GstCaps * -gst_base_sink_get_caps (GstBaseSink * sink) -{ - return NULL; -} - -static gboolean -gst_base_sink_set_caps (GstBaseSink * sink, GstCaps * caps) -{ - return TRUE; -} - -static GstFlowReturn -gst_base_sink_buffer_alloc (GstBaseSink * sink, guint64 offset, guint size, - GstCaps * caps, GstBuffer ** buf) -{ - *buf = NULL; - return GST_FLOW_OK; -} - -/* with PREROLL_LOCK */ -static GstFlowReturn -gst_base_sink_preroll_queue_empty (GstBaseSink * basesink, GstPad * pad) -{ - GstMiniObject *obj; - GQueue *q = basesink->preroll_queue; - GstFlowReturn ret; - - ret = GST_FLOW_OK; - - if (q) { - GST_DEBUG_OBJECT (basesink, "emptying queue"); - while ((obj = g_queue_pop_head (q))) { - gboolean is_buffer; - - is_buffer = GST_IS_BUFFER (obj); - if (G_LIKELY (is_buffer)) { - basesink->preroll_queued--; - basesink->buffers_queued--; - } else { - switch (GST_EVENT_TYPE (obj)) { - case GST_EVENT_EOS: - basesink->preroll_queued--; - break; - default: - break; - } - basesink->events_queued--; - } - /* we release the preroll lock while pushing so that we - * can still flush it while blocking on the clock or - * inside the element. */ - GST_PAD_PREROLL_UNLOCK (pad); - - if (G_LIKELY (is_buffer)) { - GST_DEBUG_OBJECT (basesink, "popped buffer %p", obj); - ret = gst_base_sink_handle_buffer (basesink, GST_BUFFER_CAST (obj)); - } else { - GST_DEBUG_OBJECT (basesink, "popped event %p", obj); - gst_base_sink_handle_event (basesink, GST_EVENT_CAST (obj)); - ret = GST_FLOW_OK; - } - - GST_PAD_PREROLL_LOCK (pad); - } - GST_DEBUG_OBJECT (basesink, "queue empty"); - } - return ret; -} - -/* with PREROLL_LOCK */ -static void -gst_base_sink_preroll_queue_flush (GstBaseSink * basesink, GstPad * pad) -{ - GstMiniObject *obj; - GQueue *q = basesink->preroll_queue; - - GST_DEBUG_OBJECT (basesink, "flushing queue %p", basesink); - if (q) { - while ((obj = g_queue_pop_head (q))) { - GST_DEBUG_OBJECT (basesink, "popped %p", obj); - gst_mini_object_unref (obj); - } - } - /* we can't have EOS anymore now */ - basesink->eos = FALSE; - basesink->eos_queued = FALSE; - basesink->preroll_queued = 0; - basesink->buffers_queued = 0; - basesink->events_queued = 0; - basesink->have_preroll = FALSE; - /* and signal any waiters now */ - GST_PAD_PREROLL_SIGNAL (pad); -} - -/* with PREROLL_LOCK */ -static gboolean -gst_base_sink_commit_state (GstBaseSink * basesink) -{ - /* commit state and proceed to next pending state */ - { - GstState current, next, pending, post_pending; - GstMessage *message; - gboolean post_paused = FALSE; - gboolean post_playing = FALSE; - - GST_OBJECT_LOCK (basesink); - current = GST_STATE (basesink); - next = GST_STATE_NEXT (basesink); - pending = GST_STATE_PENDING (basesink); - post_pending = pending; - - switch (pending) { - case GST_STATE_PLAYING: - basesink->need_preroll = FALSE; - post_playing = TRUE; - /* post PAUSED too when we were READY */ - if (current == GST_STATE_READY) { - post_paused = TRUE; - } - break; - case GST_STATE_PAUSED: - basesink->need_preroll = TRUE; - post_paused = TRUE; - post_pending = GST_STATE_VOID_PENDING; - break; - case GST_STATE_READY: - goto stopping; - default: - break; - } - - if (pending != GST_STATE_VOID_PENDING) { - GST_STATE (basesink) = pending; - GST_STATE_NEXT (basesink) = GST_STATE_VOID_PENDING; - GST_STATE_PENDING (basesink) = GST_STATE_VOID_PENDING; - GST_STATE_RETURN (basesink) = GST_STATE_CHANGE_SUCCESS; - } - GST_OBJECT_UNLOCK (basesink); - - if (post_paused) { - message = gst_message_new_state_changed (GST_OBJECT_CAST (basesink), - current, next, post_pending); - gst_element_post_message (GST_ELEMENT_CAST (basesink), message); - } - if (post_playing) { - message = gst_message_new_state_changed (GST_OBJECT_CAST (basesink), - next, pending, GST_STATE_VOID_PENDING); - gst_element_post_message (GST_ELEMENT_CAST (basesink), message); - } - /* and mark dirty */ - if (post_paused || post_playing) { - gst_element_post_message (GST_ELEMENT_CAST (basesink), - gst_message_new_state_dirty (GST_OBJECT_CAST (basesink))); - } - - GST_STATE_BROADCAST (basesink); - } - return TRUE; - -stopping: - { - /* app is going to READY */ - GST_OBJECT_UNLOCK (basesink); - return FALSE; - } -} - -/* with STREAM_LOCK */ -static GstFlowReturn -gst_base_sink_handle_object (GstBaseSink * basesink, GstPad * pad, - GstMiniObject * obj) -{ - gint length; - gboolean have_event; - GstFlowReturn ret; - - GST_PAD_PREROLL_LOCK (pad); - /* push object on the queue */ - GST_DEBUG_OBJECT (basesink, "push %p on preroll_queue", obj); - g_queue_push_tail (basesink->preroll_queue, obj); - - have_event = GST_IS_EVENT (obj); - if (have_event) { - GstEvent *event = GST_EVENT (obj); - - switch (GST_EVENT_TYPE (obj)) { - case GST_EVENT_EOS: - basesink->preroll_queued++; - basesink->eos = TRUE; - basesink->eos_queued = TRUE; - break; - case GST_EVENT_NEWSEGMENT: - { - gboolean update; - gdouble rate; - GstFormat format; - gint64 start; - gint64 stop; - gint64 time; - - /* the newsegment event is needed to bring the buffer timestamps to the - * stream time and to drop samples outside of the playback segment. */ - gst_event_parse_new_segment (event, &update, &rate, &format, - &start, &stop, &time); - - basesink->have_newsegment = TRUE; - - gst_segment_set_newsegment (&basesink->segment, update, rate, format, - start, stop, time); - - GST_DEBUG_OBJECT (basesink, - "received NEWSEGMENT %" GST_TIME_FORMAT " -- %" - GST_TIME_FORMAT ", time %" GST_TIME_FORMAT ", accum %" - GST_TIME_FORMAT, - GST_TIME_ARGS (basesink->segment.start), - GST_TIME_ARGS (basesink->segment.stop), - GST_TIME_ARGS (basesink->segment.time), - GST_TIME_ARGS (basesink->segment.accum)); - break; - } - default: - break; - } - basesink->events_queued++; - } else { - GstBuffer *buf = GST_BUFFER (obj); - - if (!basesink->have_newsegment) { - GST_ELEMENT_WARNING (basesink, STREAM, FAILED, - (_("Internal data flow problem.")), - ("Received buffer without a new-segment. Cannot sync to clock.")); - basesink->have_newsegment = TRUE; - /* this means this sink will not be able to sync to the clock */ - basesink->segment.start = -1; - basesink->segment.stop = -1; - } - - /* check if the buffer needs to be dropped */ - if (TRUE) { - GstClockTime start = -1, end = -1; - - /* we don't use the subclassed method as it may not return - * valid values for our purpose here */ - gst_base_sink_get_times (basesink, buf, &start, &end); - - GST_DEBUG_OBJECT (basesink, "got times start: %" GST_TIME_FORMAT - ", end: %" GST_TIME_FORMAT, GST_TIME_ARGS (start), - GST_TIME_ARGS (end)); - - if (GST_CLOCK_TIME_IS_VALID (start) && - (basesink->segment.format == GST_FORMAT_TIME)) { - if (!gst_segment_clip (&basesink->segment, GST_FORMAT_TIME, - (gint64) start, (gint64) end, NULL, NULL)) - goto dropping; - } - } - basesink->preroll_queued++; - basesink->buffers_queued++; - } - - GST_DEBUG_OBJECT (basesink, - "now %d preroll, %d buffers, %d events on queue", - basesink->preroll_queued, - basesink->buffers_queued, basesink->events_queued); - - /* check if we are prerolling */ - if (!basesink->need_preroll) - goto no_preroll; - - /* there is a buffer queued */ - if (basesink->buffers_queued == 1) { - GST_DEBUG_OBJECT (basesink, "do preroll %p", obj); - - /* if it's a buffer, we need to call the preroll method */ - if (GST_IS_BUFFER (obj)) { - GstBaseSinkClass *bclass; - GstBuffer *buf = GST_BUFFER (obj); - - GST_DEBUG_OBJECT (basesink, "preroll buffer %" GST_TIME_FORMAT, - GST_TIME_ARGS (GST_BUFFER_TIMESTAMP (buf))); - - bclass = GST_BASE_SINK_GET_CLASS (basesink); - if (bclass->preroll) - if ((ret = bclass->preroll (basesink, buf)) != GST_FLOW_OK) - goto preroll_failed; - } - } - length = basesink->preroll_queued; - GST_DEBUG_OBJECT (basesink, "prerolled length %d", length); - - if (length == 1) { - - basesink->have_preroll = TRUE; - - /* commit state */ - if (!gst_base_sink_commit_state (basesink)) - goto stopping; - - GST_OBJECT_LOCK (pad); - if (G_UNLIKELY (GST_PAD_IS_FLUSHING (pad))) - goto flushing; - GST_OBJECT_UNLOCK (pad); - - /* it is possible that commiting the state made us go to PLAYING - * now in which case we don't need to block anymore. */ - if (!basesink->need_preroll) - goto no_preroll; - - length = basesink->preroll_queued; - - /* FIXME: a pad probe could have made us lose the buffer, according - * to one of the python tests */ - if (length == 0) { - GST_ERROR_OBJECT (basesink, - "preroll_queued dropped from 1 to 0 while committing state change"); - } - g_assert (length <= 1); - } - - /* see if we need to block now. We cannot block on events, only - * on buffers, the reason is that events can be sent from the - * application thread and we don't want to block there. */ - if (length > basesink->preroll_queue_max_len && !have_event) { - /* block until the state changes, or we get a flush, or something */ - GST_DEBUG_OBJECT (basesink, "waiting to finish preroll"); - GST_PAD_PREROLL_WAIT (pad); - GST_DEBUG_OBJECT (basesink, "done preroll"); - GST_OBJECT_LOCK (pad); - if (G_UNLIKELY (GST_PAD_IS_FLUSHING (pad))) - goto flushing; - GST_OBJECT_UNLOCK (pad); - } - GST_PAD_PREROLL_UNLOCK (pad); - - return GST_FLOW_OK; - -no_preroll: - { - GST_DEBUG_OBJECT (basesink, "no preroll needed"); - /* maybe it was another sink that blocked in preroll, need to check for - buffers to drain */ - basesink->have_preroll = FALSE; - ret = gst_base_sink_preroll_queue_empty (basesink, pad); - GST_PAD_PREROLL_UNLOCK (pad); - - return ret; - } -dropping: - { - GstBuffer *buf; - - buf = GST_BUFFER (g_queue_pop_tail (basesink->preroll_queue)); - - gst_buffer_unref (buf); - GST_PAD_PREROLL_UNLOCK (pad); - - return GST_FLOW_OK; - } -flushing: - { - GST_OBJECT_UNLOCK (pad); - gst_base_sink_preroll_queue_flush (basesink, pad); - GST_PAD_PREROLL_UNLOCK (pad); - GST_DEBUG_OBJECT (basesink, "pad is flushing"); - - return GST_FLOW_WRONG_STATE; - } -stopping: - { - GST_PAD_PREROLL_UNLOCK (pad); - GST_DEBUG_OBJECT (basesink, "stopping"); - - return GST_FLOW_WRONG_STATE; - } -preroll_failed: - { - GST_DEBUG_OBJECT (basesink, "preroll failed"); - gst_base_sink_preroll_queue_flush (basesink, pad); - GST_PAD_PREROLL_UNLOCK (pad); - - GST_DEBUG_OBJECT (basesink, "abort state"); - gst_element_abort_state (GST_ELEMENT (basesink)); - - return ret; - } -} - -static gboolean -gst_base_sink_event (GstPad * pad, GstEvent * event) -{ - GstBaseSink *basesink; - gboolean result = TRUE; - GstBaseSinkClass *bclass; - - basesink = GST_BASE_SINK (gst_pad_get_parent (pad)); - - bclass = GST_BASE_SINK_GET_CLASS (basesink); - - GST_DEBUG_OBJECT (basesink, "event %p", event); - - switch (GST_EVENT_TYPE (event)) { - case GST_EVENT_EOS: - { - GstFlowReturn ret; - - /* EOS also finishes the preroll */ - ret = - gst_base_sink_handle_object (basesink, pad, GST_MINI_OBJECT (event)); - break; - } - case GST_EVENT_NEWSEGMENT: - { - GstFlowReturn ret; - - ret = - gst_base_sink_handle_object (basesink, pad, GST_MINI_OBJECT (event)); - break; - } - case GST_EVENT_FLUSH_START: - /* make sure we are not blocked on the clock also clear any pending - * eos state. */ - if (bclass->event) - bclass->event (basesink, event); - - GST_OBJECT_LOCK (basesink); - basesink->flushing = TRUE; - if (basesink->clock_id) { - gst_clock_id_unschedule (basesink->clock_id); - } - GST_OBJECT_UNLOCK (basesink); - - GST_PAD_PREROLL_LOCK (pad); - /* we need preroll after the flush */ - GST_DEBUG_OBJECT (basesink, "flushing, need preroll after flush"); - basesink->need_preroll = TRUE; - /* unlock from a possible state change/preroll */ - gst_base_sink_preroll_queue_flush (basesink, pad); - GST_PAD_PREROLL_UNLOCK (pad); - - /* and we need to commit our state again on the next - * prerolled buffer */ - GST_PAD_STREAM_LOCK (pad); - gst_element_lost_state (GST_ELEMENT (basesink)); - GST_PAD_STREAM_UNLOCK (pad); - GST_DEBUG_OBJECT (basesink, "event unref %p %p", basesink, event); - gst_event_unref (event); - break; - case GST_EVENT_FLUSH_STOP: - if (bclass->event) - bclass->event (basesink, event); - - /* now we are completely unblocked and the _chain method - * will return */ - GST_OBJECT_LOCK (basesink); - basesink->flushing = FALSE; - GST_OBJECT_UNLOCK (basesink); - /* we need new segment info after the flush. */ - gst_segment_init (&basesink->segment, GST_FORMAT_UNDEFINED); - - GST_DEBUG_OBJECT (basesink, "event unref %p %p", basesink, event); - gst_event_unref (event); - break; - default: - gst_event_unref (event); - break; - } - gst_object_unref (basesink); - - return result; -} - -/* default implementation to calculate the start and end - * timestamps on a buffer, subclasses can override - */ -static void -gst_base_sink_get_times (GstBaseSink * basesink, GstBuffer * buffer, - GstClockTime * start, GstClockTime * end) -{ - GstClockTime timestamp, duration; - - timestamp = GST_BUFFER_TIMESTAMP (buffer); - if (GST_CLOCK_TIME_IS_VALID (timestamp)) { - - /* get duration to calculate end time */ - duration = GST_BUFFER_DURATION (buffer); - if (GST_CLOCK_TIME_IS_VALID (duration)) { - *end = timestamp + duration; - } - *start = timestamp; - } -} - -/* with STREAM_LOCK and LOCK*/ -static GstClockReturn -gst_base_sink_wait (GstBaseSink * basesink, GstClockTime time) -{ - GstClockReturn ret; - GstClockID id; - - /* no need to attempt a clock wait if we are flushing */ - if (basesink->flushing) { - return GST_CLOCK_UNSCHEDULED; - } - - /* clock_id should be NULL outside of this function */ - g_assert (basesink->clock_id == NULL); - g_assert (GST_CLOCK_TIME_IS_VALID (time)); - - id = gst_clock_new_single_shot_id (GST_ELEMENT_CLOCK (basesink), time); - - basesink->clock_id = id; - /* release the object lock while waiting */ - GST_OBJECT_UNLOCK (basesink); - - ret = gst_clock_id_wait (id, NULL); - - GST_OBJECT_LOCK (basesink); - gst_clock_id_unref (id); - basesink->clock_id = NULL; - - return ret; -} - -/* perform synchronisation on a buffer - * - * 1) check if we have a clock, if not, do nothing - * 2) calculate the start and end time of the buffer - * 3) create a single shot notification to wait on - * the clock, save the entry so we can unlock it - * 4) wait on the clock, this blocks - * 5) unref the clockid again - */ -static GstClockReturn -gst_base_sink_do_sync (GstBaseSink * basesink, GstBuffer * buffer) -{ - GstClockReturn result = GST_CLOCK_OK; - GstClockTime start, end; - gint64 cstart, cend; - GstBaseSinkClass *bclass; - - bclass = GST_BASE_SINK_GET_CLASS (basesink); - - start = end = -1; - if (bclass->get_times) - bclass->get_times (basesink, buffer, &start, &end); - - GST_DEBUG_OBJECT (basesink, "got times start: %" GST_TIME_FORMAT - ", end: %" GST_TIME_FORMAT, GST_TIME_ARGS (start), GST_TIME_ARGS (end)); - - /* if we don't have a timestamp, we don't sync */ - if (!GST_CLOCK_TIME_IS_VALID (start)) { - GST_DEBUG_OBJECT (basesink, "start not valid"); - goto done; - } - - if (basesink->segment.format == GST_FORMAT_TIME) { - /* save last times seen. */ - if (GST_CLOCK_TIME_IS_VALID (end)) - gst_segment_set_last_stop (&basesink->segment, GST_FORMAT_TIME, - (gint64) end); - else - gst_segment_set_last_stop (&basesink->segment, GST_FORMAT_TIME, - (gint64) start); - - /* clip */ - if (!gst_segment_clip (&basesink->segment, GST_FORMAT_TIME, - (gint64) start, (gint64) end, &cstart, &cend)) - goto out_of_segment; - } else { - /* no clipping for formats different from GST_FORMAT_TIME */ - cstart = start; - cend = end; - } - - if (!basesink->sync) { - GST_DEBUG_OBJECT (basesink, "no need to sync"); - goto done; - } - - /* now do clocking */ - if (GST_ELEMENT_CLOCK (basesink) - && ((basesink->segment.format == GST_FORMAT_TIME) - || (basesink->segment.accum == 0))) { - GstClockTime base_time; - GstClockTimeDiff stream_start, stream_end; - - stream_start = - gst_segment_to_running_time (&basesink->segment, GST_FORMAT_TIME, - cstart); - stream_end = - gst_segment_to_running_time (&basesink->segment, GST_FORMAT_TIME, cend); - - GST_OBJECT_LOCK (basesink); - - base_time = GST_ELEMENT_CAST (basesink)->base_time; - - GST_LOG_OBJECT (basesink, - "waiting for clock, base time %" GST_TIME_FORMAT - " stream_start %" GST_TIME_FORMAT, - GST_TIME_ARGS (base_time), GST_TIME_ARGS (stream_start)); - - /* also save end_time of this buffer so that we can wait - * to signal EOS */ - if (GST_CLOCK_TIME_IS_VALID (stream_end)) - basesink->end_time = stream_end + base_time; - else - basesink->end_time = GST_CLOCK_TIME_NONE; - - result = gst_base_sink_wait (basesink, stream_start + base_time); - - GST_OBJECT_UNLOCK (basesink); - - GST_LOG_OBJECT (basesink, "clock entry done: %d", result); - } else { - GST_DEBUG_OBJECT (basesink, "no clock, not syncing"); - } - -done: - return result; - -out_of_segment: - { - GST_LOG_OBJECT (basesink, "buffer skipped, not in segment"); - return GST_CLOCK_UNSCHEDULED; - } -} - - -/* handle an event - * - * 2) render the event - * 3) unref the event - */ -static inline gboolean -gst_base_sink_handle_event (GstBaseSink * basesink, GstEvent * event) -{ - GstBaseSinkClass *bclass; - gboolean ret; - - switch (GST_EVENT_TYPE (event)) { - case GST_EVENT_EOS: - GST_OBJECT_LOCK (basesink); - if (GST_ELEMENT_CLOCK (basesink)) { - /* wait for last buffer to finish if we have a valid end time */ - if (GST_CLOCK_TIME_IS_VALID (basesink->end_time)) { - gst_base_sink_wait (basesink, basesink->end_time); - basesink->end_time = GST_CLOCK_TIME_NONE; - } - } - GST_OBJECT_UNLOCK (basesink); - break; - default: - break; - } - - bclass = GST_BASE_SINK_GET_CLASS (basesink); - if (bclass->event) - ret = bclass->event (basesink, event); - else - ret = TRUE; - - switch (GST_EVENT_TYPE (event)) { - case GST_EVENT_EOS: - GST_PAD_PREROLL_LOCK (basesink->sinkpad); - /* if we are still EOS, we can post the EOS message */ - if (basesink->eos) { - /* ok, now we can post the message */ - GST_DEBUG_OBJECT (basesink, "Now posting EOS"); - gst_element_post_message (GST_ELEMENT_CAST (basesink), - gst_message_new_eos (GST_OBJECT_CAST (basesink))); - basesink->eos_queued = FALSE; - } - GST_PAD_PREROLL_UNLOCK (basesink->sinkpad); - break; - default: - break; - } - - GST_DEBUG_OBJECT (basesink, "event unref %p %p", basesink, event); - gst_event_unref (event); - - return ret; -} - -/* handle a buffer - * - * 1) first sync on the buffer - * 2) render the buffer - * 3) unref the buffer - */ -static inline GstFlowReturn -gst_base_sink_handle_buffer (GstBaseSink * basesink, GstBuffer * buf) -{ - GstFlowReturn ret = GST_FLOW_OK; - GstClockReturn status; - - status = gst_base_sink_do_sync (basesink, buf); - switch (status) { - case GST_CLOCK_EARLY: - GST_DEBUG_OBJECT (basesink, "buffer too late!, rendering anyway"); - /* fallthrough for now */ - case GST_CLOCK_OK: - { - GstBaseSinkClass *bclass; - - bclass = GST_BASE_SINK_GET_CLASS (basesink); - if (bclass->render) - ret = bclass->render (basesink, buf); - break; - } - default: - GST_DEBUG_OBJECT (basesink, "clock returned %d, not rendering", status); - break; - } - - GST_DEBUG_OBJECT (basesink, "buffer unref after render %p", basesink, buf); - gst_buffer_unref (buf); - - return ret; -} - -static GstFlowReturn -gst_base_sink_chain (GstPad * pad, GstBuffer * buf) -{ - GstBaseSink *basesink; - GstFlowReturn result; - - basesink = GST_BASE_SINK (gst_pad_get_parent (pad)); - - if (!(basesink->pad_mode == GST_ACTIVATE_PUSH)) { - GST_OBJECT_LOCK (pad); - g_warning ("Push on pad %s:%s, but it was not activated in push mode", - GST_DEBUG_PAD_NAME (pad)); - GST_OBJECT_UNLOCK (pad); - result = GST_FLOW_UNEXPECTED; - goto done; - } - - result = - gst_base_sink_handle_object (basesink, pad, GST_MINI_OBJECT_CAST (buf)); - -done: - gst_object_unref (basesink); - - return result; -} - -static void -gst_base_sink_loop (GstPad * pad) -{ - GstBaseSink *basesink; - GstBuffer *buf = NULL; - GstFlowReturn result; - - basesink = GST_BASE_SINK (gst_pad_get_parent (pad)); - - g_assert (basesink->pad_mode == GST_ACTIVATE_PULL); - - result = gst_pad_pull_range (pad, basesink->offset, DEFAULT_SIZE, &buf); - if (result != GST_FLOW_OK) - goto paused; - - result = gst_base_sink_handle_object (basesink, pad, GST_MINI_OBJECT (buf)); - if (result != GST_FLOW_OK) - goto paused; - - gst_object_unref (basesink); - - /* default */ - return; - -paused: - { - gst_base_sink_event (pad, gst_event_new_eos ()); - gst_object_unref (basesink); - gst_pad_pause_task (pad); - return; - } -} - -static gboolean -gst_base_sink_deactivate (GstBaseSink * basesink, GstPad * pad) -{ - gboolean result = FALSE; - GstBaseSinkClass *bclass; - - bclass = GST_BASE_SINK_GET_CLASS (basesink); - - /* step 1, unblock clock sync (if any) or any other blocking thing */ - GST_PAD_PREROLL_LOCK (pad); - GST_OBJECT_LOCK (basesink); - if (basesink->clock_id) { - gst_clock_id_unschedule (basesink->clock_id); - } - GST_OBJECT_UNLOCK (basesink); - - /* unlock any subclasses */ - if (bclass->unlock) - bclass->unlock (basesink); - - /* flush out the data thread if it's locked in finish_preroll */ - GST_DEBUG_OBJECT (basesink, - "flushing out data thread, need preroll to FALSE"); - basesink->need_preroll = FALSE; - gst_base_sink_preroll_queue_flush (basesink, pad); - GST_PAD_PREROLL_SIGNAL (pad); - GST_PAD_PREROLL_UNLOCK (pad); - - /* step 2, make sure streaming finishes */ - result = gst_pad_stop_task (pad); - - return result; -} - -static gboolean -gst_base_sink_activate (GstPad * pad) -{ - gboolean result = FALSE; - GstBaseSink *basesink; - - basesink = GST_BASE_SINK (gst_pad_get_parent (pad)); - - GST_DEBUG_OBJECT (basesink, "Trying pull mode first"); - - if (basesink->can_activate_pull && gst_pad_check_pull_range (pad) - && gst_pad_activate_pull (pad, TRUE)) { - GST_DEBUG_OBJECT (basesink, "Success activating pull mode"); - result = TRUE; - } else { - GST_DEBUG_OBJECT (basesink, "Falling back to push mode"); - if (gst_pad_activate_push (pad, TRUE)) { - GST_DEBUG_OBJECT (basesink, "Success activating push mode"); - result = TRUE; - } - } - - if (!result) { - GST_WARNING_OBJECT (basesink, "Could not activate pad in either mode"); - } - - gst_object_unref (basesink); - - return result; -} - -static gboolean -gst_base_sink_activate_push (GstPad * pad, gboolean active) -{ - gboolean result; - GstBaseSink *basesink; - - basesink = GST_BASE_SINK (gst_pad_get_parent (pad)); - - if (active) { - if (!basesink->can_activate_push) { - result = FALSE; - basesink->pad_mode = GST_ACTIVATE_NONE; - } else { - result = TRUE; - basesink->pad_mode = GST_ACTIVATE_PUSH; - } - } else { - if (G_UNLIKELY (basesink->pad_mode != GST_ACTIVATE_PUSH)) { - g_warning ("Internal GStreamer activation error!!!"); - result = FALSE; - } else { - result = gst_base_sink_deactivate (basesink, pad); - basesink->pad_mode = GST_ACTIVATE_NONE; - } - } - - gst_object_unref (basesink); - - return result; -} - -/* this won't get called until we implement an activate function */ -static gboolean -gst_base_sink_activate_pull (GstPad * pad, gboolean active) -{ - gboolean result = FALSE; - GstBaseSink *basesink; - - basesink = GST_BASE_SINK (gst_pad_get_parent (pad)); - - if (active) { - if (!basesink->can_activate_pull) { - result = FALSE; - basesink->pad_mode = GST_ACTIVATE_NONE; - } else { - GstPad *peer = gst_pad_get_peer (pad); - - if (G_UNLIKELY (peer == NULL)) { - g_warning ("Trying to activate pad in pull mode, but no peer"); - result = FALSE; - basesink->pad_mode = GST_ACTIVATE_NONE; - } else { - if (gst_pad_activate_pull (peer, TRUE)) { - basesink->have_newsegment = TRUE; - gst_segment_init (&basesink->segment, GST_FORMAT_UNDEFINED); - - /* set the pad mode before starting the task so that it's in the - correct state for the new thread... */ - basesink->pad_mode = GST_ACTIVATE_PULL; - result = - gst_pad_start_task (pad, (GstTaskFunction) gst_base_sink_loop, - pad); - /* but if starting the thread fails, set it back */ - if (!result) - basesink->pad_mode = GST_ACTIVATE_NONE; - } else { - GST_DEBUG_OBJECT (pad, "Failed to activate peer in pull mode"); - result = FALSE; - basesink->pad_mode = GST_ACTIVATE_NONE; - } - gst_object_unref (peer); - } - } - } else { - if (G_UNLIKELY (basesink->pad_mode != GST_ACTIVATE_PULL)) { - g_warning ("Internal GStreamer activation error!!!"); - result = FALSE; - } else { - basesink->have_newsegment = FALSE; - result = gst_base_sink_deactivate (basesink, pad); - basesink->pad_mode = GST_ACTIVATE_NONE; - } - } - - gst_object_unref (basesink); - - return result; -} - -static gboolean -gst_base_sink_send_event (GstElement * element, GstEvent * event) -{ - GstPad *pad; - GstBaseSink *basesink = GST_BASE_SINK (element); - gboolean result; - - GST_OBJECT_LOCK (element); - pad = basesink->sinkpad; - gst_object_ref (pad); - GST_OBJECT_UNLOCK (element); - - result = gst_pad_push_event (pad, event); - - gst_object_unref (pad); - - return result; -} - -static gboolean -gst_base_sink_peer_query (GstBaseSink * sink, GstQuery * query) -{ - GstPad *peer; - gboolean res = FALSE; - - if ((peer = gst_pad_get_peer (sink->sinkpad))) { - res = gst_pad_query (peer, query); - gst_object_unref (peer); - } - return res; -} - -static gboolean -gst_base_sink_get_position (GstBaseSink * basesink, GstFormat format, - gint64 * cur) -{ - GstClock *clock; - gboolean res = FALSE; - - switch (format) { - case GST_FORMAT_TIME: - { - /* we can answer time format */ - GST_OBJECT_LOCK (basesink); - if ((clock = GST_ELEMENT_CLOCK (basesink))) { - GstClockTime now; - gint64 time; - - gst_object_ref (clock); - GST_OBJECT_UNLOCK (basesink); - - now = gst_clock_get_time (clock); - - GST_OBJECT_LOCK (basesink); - if (GST_CLOCK_TIME_IS_VALID (basesink->segment.time)) - time = basesink->segment.time; - else - time = 0; - - *cur = now - GST_ELEMENT_CAST (basesink)->base_time - - basesink->segment.accum + time; - - GST_DEBUG_OBJECT (basesink, - "now %" GST_TIME_FORMAT " + segment_time %" GST_TIME_FORMAT " = %" - GST_TIME_FORMAT, GST_TIME_ARGS (now), - GST_TIME_ARGS (time), GST_TIME_ARGS (*cur)); - - gst_object_unref (clock); - - res = TRUE; - } - GST_OBJECT_UNLOCK (basesink); - } - default: - break; - } - return res; -} - -static gboolean -gst_base_sink_query (GstElement * element, GstQuery * query) -{ - gboolean res = FALSE; - - GstBaseSink *basesink = GST_BASE_SINK (element); - - switch (GST_QUERY_TYPE (query)) { - case GST_QUERY_POSITION: - { - gint64 cur = 0; - GstFormat format; - gboolean eos; - - GST_PAD_PREROLL_LOCK (basesink->sinkpad); - eos = basesink->eos; - GST_PAD_PREROLL_UNLOCK (basesink->sinkpad); - - if (eos) { - res = gst_base_sink_peer_query (basesink, query); - } else { - gst_query_parse_position (query, &format, NULL); - - GST_DEBUG_OBJECT (basesink, "current position format %d", format); - - if ((res = gst_base_sink_get_position (basesink, format, &cur))) { - gst_query_set_position (query, format, cur); - } else { - res = gst_base_sink_peer_query (basesink, query); - } - } - break; - } - case GST_QUERY_DURATION: - res = gst_base_sink_peer_query (basesink, query); - break; - case GST_QUERY_LATENCY: - break; - case GST_QUERY_JITTER: - break; - case GST_QUERY_RATE: - //gst_query_set_rate (query, basesink->segment_rate); - res = TRUE; - break; - case GST_QUERY_SEGMENT: - { - /* FIXME, bring start/stop to stream time */ - gst_query_set_segment (query, basesink->segment.rate, - GST_FORMAT_TIME, basesink->segment.start, basesink->segment.stop); - break; - } - case GST_QUERY_SEEKING: - case GST_QUERY_CONVERT: - case GST_QUERY_FORMATS: - default: - res = gst_base_sink_peer_query (basesink, query); - break; - } - return res; -} - -static GstStateChangeReturn -gst_base_sink_change_state (GstElement * element, GstStateChange transition) -{ - GstStateChangeReturn ret = GST_STATE_CHANGE_SUCCESS; - GstBaseSink *basesink = GST_BASE_SINK (element); - GstBaseSinkClass *bclass; - - bclass = GST_BASE_SINK_GET_CLASS (basesink); - - switch (transition) { - case GST_STATE_CHANGE_NULL_TO_READY: - if (bclass->start) - if (!bclass->start (basesink)) - goto start_failed; - break; - case GST_STATE_CHANGE_READY_TO_PAUSED: - /* need to complete preroll before this state change completes, there - * is no data flow in READY so we can safely assume we need to preroll. */ - basesink->offset = 0; - GST_PAD_PREROLL_LOCK (basesink->sinkpad); - basesink->have_preroll = FALSE; - GST_DEBUG_OBJECT (basesink, "READY to PAUSED, need preroll to FALSE"); - basesink->need_preroll = TRUE; - GST_PAD_PREROLL_UNLOCK (basesink->sinkpad); - gst_segment_init (&basesink->segment, GST_FORMAT_UNDEFINED); - basesink->have_newsegment = FALSE; - ret = GST_STATE_CHANGE_ASYNC; - break; - case GST_STATE_CHANGE_PAUSED_TO_PLAYING: - GST_PAD_PREROLL_LOCK (basesink->sinkpad); - /* no preroll needed */ - basesink->need_preroll = FALSE; - - /* if we have EOS, we should empty the queue now as there will - * be no more data received in the chain function. - * FIXME, this could block the state change function too long when - * we are pushing and syncing the buffers, better start a new - * thread to do this. */ - if (basesink->eos) { - gboolean do_eos = !basesink->eos_queued; - - gst_base_sink_preroll_queue_empty (basesink, basesink->sinkpad); - - /* need to post EOS message here if it was not in the preroll queue we - * just emptied. */ - if (do_eos) { - GST_DEBUG_OBJECT (basesink, "Now posting EOS"); - gst_element_post_message (GST_ELEMENT_CAST (basesink), - gst_message_new_eos (GST_OBJECT_CAST (basesink))); - } - } else if (!basesink->have_preroll) { - /* queue a commit_state */ - basesink->need_preroll = TRUE; - GST_DEBUG_OBJECT (basesink, - "PAUSED to PLAYING, !eos, !have_preroll, need preroll to TRUE"); - ret = GST_STATE_CHANGE_ASYNC; - /* we know it's not waiting, no need to signal */ - } else { - GST_DEBUG_OBJECT (basesink, - "PAUSED to PLAYING, !eos, have_preroll, need preroll to FALSE"); - /* now let it play */ - GST_PAD_PREROLL_SIGNAL (basesink->sinkpad); - } - GST_PAD_PREROLL_UNLOCK (basesink->sinkpad); - break; - default: - break; - } - - { - GstStateChangeReturn bret; - - bret = GST_ELEMENT_CLASS (parent_class)->change_state (element, transition); - if (bret == GST_STATE_CHANGE_FAILURE) - goto activate_failed; - } - - switch (transition) { - case GST_STATE_CHANGE_PLAYING_TO_PAUSED: - { - GstBaseSinkClass *bclass; - - bclass = GST_BASE_SINK_GET_CLASS (basesink); - - GST_PAD_PREROLL_LOCK (basesink->sinkpad); - GST_OBJECT_LOCK (basesink); - /* unlock clock wait if any */ - if (basesink->clock_id) { - gst_clock_id_unschedule (basesink->clock_id); - } - GST_OBJECT_UNLOCK (basesink); - - /* unlock any subclasses */ - if (bclass->unlock) - bclass->unlock (basesink); - - /* if we don't have a preroll buffer and we have not received EOS, - * we need to wait for a preroll */ - GST_DEBUG_OBJECT (basesink, "have_preroll: %d, EOS: %d", - basesink->have_preroll, basesink->eos); - if (!basesink->have_preroll && !basesink->eos - && GST_STATE_PENDING (basesink) == GST_STATE_PAUSED) { - GST_DEBUG_OBJECT (basesink, "PLAYING to PAUSED, need preroll to TRUE"); - basesink->need_preroll = TRUE; - ret = GST_STATE_CHANGE_ASYNC; - } - GST_PAD_PREROLL_UNLOCK (basesink->sinkpad); - break; - } - case GST_STATE_CHANGE_PAUSED_TO_READY: - break; - case GST_STATE_CHANGE_READY_TO_NULL: - if (bclass->stop) - if (!bclass->stop (basesink)) { - GST_WARNING ("failed to stop"); - } - break; - default: - break; - } - - return ret; - - /* ERRORS */ -start_failed: - { - GST_DEBUG_OBJECT (basesink, "failed to start"); - return GST_STATE_CHANGE_FAILURE; - } -activate_failed: - { - GST_DEBUG_OBJECT (basesink, - "element failed to change states -- activation problem?"); - return GST_STATE_CHANGE_FAILURE; - } -} -- cgit v1.2.3-70-g09d2