gstreamer/gst/gstpipeline.c

603 lines
16 KiB
C
Raw Normal View History

/* GStreamer
* Copyright (C) 1999,2000 Erik Walthinsen <omega@cse.ogi.edu>
* 2004,2005 Wim Taymans <wim@fluendo.com>
*
* gstpipeline.c: Overall pipeline management element
*
* 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.
*/
#include "gst_private.h"
#include "gstpipeline.h"
#include "gstinfo.h"
#include "gstscheduler.h"
#include "gstsystemclock.h"
static GstElementDetails gst_pipeline_details =
GST_ELEMENT_DETAILS ("Pipeline object",
"Generic/Bin",
"Complete pipeline object",
"Erik Walthinsen <omega@cse.ogi.edu>, Wim Taymans <wim@fluendo.com>");
/* Pipeline signals and args */
enum
{
/* FILL ME */
LAST_SIGNAL
};
#define DEFAULT_DELAY 0
#define DEFAULT_PLAY_TIMEOUT (2*GST_SECOND)
enum
{
ARG_0,
ARG_DELAY,
ARG_PLAY_TIMEOUT,
/* FILL ME */
};
static void gst_pipeline_base_init (gpointer g_class);
static void gst_pipeline_class_init (gpointer g_class, gpointer class_data);
static void gst_pipeline_init (GTypeInstance * instance, gpointer g_class);
static void gst_pipeline_dispose (GObject * object);
static void gst_pipeline_set_property (GObject * object, guint prop_id,
const GValue * value, GParamSpec * pspec);
static void gst_pipeline_get_property (GObject * object, guint prop_id,
GValue * value, GParamSpec * pspec);
static gboolean gst_pipeline_send_event (GstElement * element,
GstEvent * event);
static GstBusSyncReply pipeline_bus_handler (GstBus * bus, GstMessage * message,
GstPipeline * pipeline);
static GstClock *gst_pipeline_get_clock_func (GstElement * element);
static GstElementStateReturn gst_pipeline_change_state (GstElement * element);
WARNING: Don't grab this updated unless you're really, REALLY sure. Original commit message from CVS: WARNING: Don't grab this updated unless you're really, REALLY sure. WARNING: Wait for the next one. Whole lotta changes here, including a few random bits: examples/*/Makefile: updated to use `libtool gcc`, not just `gcc` gst/ gstbuffer.h: updated to new flag style gst.c, gstdebug.h: added new debugging for function ptrs gstpipeline.c: set type of parent_class to the class, not the object gstthread.c: ditto plugins/ cdparanoia/cdparanoia.c: added an argument type, updated some defaults cobin/spindentity.c: updated to new do/while loopfunction style mp3encode/lame/gstlame.c: argument types, whole lotta lame options tests/: various changes Now, for the big changes: Once again, the scheduling system has changed. And once again, it broke a whole bunch of things. The gist of the change is that there is now a function pointer for gst_pad_push and gst_pad_pull, instead of a hard-wired function. Well, currently they are functions, but that's for debugging purposes only, they just call the function pointer after spewing lots of DEBUG(). This changed the GstPad structure a bit, and the GstPad API as well. Where elements used to provide chain() and pull() functions, they provide chain() and get() functions. gst_pad_set_pull[region]_function has been changed to get_pad_set_get[region]_function. This means all the elements out there that used to have pull functions need to be updated. The calls to that function have been changed in the normal elements, but the names of the functions passed is still _pull[region](), which is an aesthetic issue more than anything. As for what doesn't work yet, just about anything dealing with Connections is hosed, meaning threaded stuff won't work. This will be fixed about 12 hours from now, after I've slept, etc. The simplefake.c test works in both cothreaded and chained cases, but not much else will work due to the Connection problem. Needless to say, don't grab this unless you *need* these features *now*, else wait to update this stuff until tomorrow. I'm going to sleep now.
2000-12-16 10:18:09 +00:00
static GstBinClass *parent_class = NULL;
/* static guint gst_pipeline_signals[LAST_SIGNAL] = { 0 }; */
GType
gst_pipeline_get_type (void)
{
static GType pipeline_type = 0;
if (!pipeline_type) {
static const GTypeInfo pipeline_info = {
sizeof (GstPipelineClass),
gst_pipeline_base_init,
NULL,
(GClassInitFunc) gst_pipeline_class_init,
NULL,
NULL,
sizeof (GstPipeline),
0,
gst_pipeline_init,
NULL
};
pipeline_type =
g_type_register_static (GST_TYPE_BIN, "GstPipeline", &pipeline_info, 0);
}
return pipeline_type;
}
static void
gst_pipeline_base_init (gpointer g_class)
{
GstElementClass *gstelement_class = GST_ELEMENT_CLASS (g_class);
gst_element_class_set_details (gstelement_class, &gst_pipeline_details);
}
static void
gst_pipeline_class_init (gpointer g_class, gpointer class_data)
{
GObjectClass *gobject_class = G_OBJECT_CLASS (g_class);
GstElementClass *gstelement_class = GST_ELEMENT_CLASS (g_class);
GstPipelineClass *klass = GST_PIPELINE_CLASS (g_class);
parent_class = g_type_class_peek_parent (klass);
gobject_class->set_property = GST_DEBUG_FUNCPTR (gst_pipeline_set_property);
gobject_class->get_property = GST_DEBUG_FUNCPTR (gst_pipeline_get_property);
g_object_class_install_property (G_OBJECT_CLASS (klass), ARG_DELAY,
g_param_spec_uint64 ("delay", "Delay",
"Expected delay needed for elements "
"to spin up to PLAYING in nanoseconds", 0, G_MAXUINT64, DEFAULT_DELAY,
G_PARAM_READWRITE));
g_object_class_install_property (G_OBJECT_CLASS (klass), ARG_PLAY_TIMEOUT,
g_param_spec_uint64 ("play-timeout", "Play Timeout",
"Max timeout for going " "to PLAYING in nanoseconds", 0, G_MAXUINT64,
DEFAULT_PLAY_TIMEOUT, G_PARAM_READWRITE));
gobject_class->dispose = GST_DEBUG_FUNCPTR (gst_pipeline_dispose);
gstelement_class->send_event = GST_DEBUG_FUNCPTR (gst_pipeline_send_event);
gstelement_class->change_state =
GST_DEBUG_FUNCPTR (gst_pipeline_change_state);
gstelement_class->get_clock = GST_DEBUG_FUNCPTR (gst_pipeline_get_clock_func);
}
static void
gst_pipeline_init (GTypeInstance * instance, gpointer g_class)
{
GstScheduler *scheduler;
GstPipeline *pipeline = GST_PIPELINE (instance);
GstBus *bus;
/* get an instance of the default scheduler */
scheduler = gst_scheduler_factory_make (NULL, GST_ELEMENT (pipeline));
/* FIXME need better error handling */
if (scheduler == NULL) {
const gchar *name = gst_scheduler_factory_get_default_name ();
g_error ("Critical error: could not get scheduler \"%s\"\n"
"Are you sure you have a registry ?\n"
"Run gst-register as root if you haven't done so yet.", name);
}
bus = g_object_new (gst_bus_get_type (), NULL);
gst_bus_set_sync_handler (bus,
(GstBusSyncHandler) pipeline_bus_handler, pipeline);
pipeline->eosed = NULL;
pipeline->delay = DEFAULT_DELAY;
pipeline->play_timeout = DEFAULT_PLAY_TIMEOUT;
/* we are our own manager */
GST_ELEMENT_MANAGER (pipeline) = pipeline;
gst_element_set_bus (GST_ELEMENT (pipeline), bus);
gst_element_set_scheduler (GST_ELEMENT (pipeline), scheduler);
}
static void
gst_pipeline_dispose (GObject * object)
{
GstPipeline *pipeline = GST_PIPELINE (object);
gst_scheduler_reset (GST_ELEMENT_SCHEDULER (object));
gst_object_replace ((GstObject **) & pipeline->fixed_clock, NULL);
G_OBJECT_CLASS (parent_class)->dispose (object);
}
static void
gst_pipeline_set_property (GObject * object, guint prop_id,
const GValue * value, GParamSpec * pspec)
{
GstPipeline *pipeline = GST_PIPELINE (object);
GST_LOCK (pipeline);
switch (prop_id) {
case ARG_DELAY:
pipeline->delay = g_value_get_uint64 (value);
break;
case ARG_PLAY_TIMEOUT:
pipeline->play_timeout = g_value_get_uint64 (value);
break;
default:
G_OBJECT_WARN_INVALID_PROPERTY_ID (object, prop_id, pspec);
break;
}
GST_UNLOCK (pipeline);
}
static void
gst_pipeline_get_property (GObject * object, guint prop_id,
GValue * value, GParamSpec * pspec)
{
GstPipeline *pipeline = GST_PIPELINE (object);
GST_LOCK (pipeline);
switch (prop_id) {
case ARG_DELAY:
g_value_set_uint64 (value, pipeline->delay);
break;
case ARG_PLAY_TIMEOUT:
g_value_set_uint64 (value, pipeline->play_timeout);
break;
default:
G_OBJECT_WARN_INVALID_PROPERTY_ID (object, prop_id, pspec);
break;
}
GST_UNLOCK (pipeline);
}
static gboolean
is_eos (GstPipeline * pipeline)
{
GstIterator *sinks;
gboolean result = TRUE;
gboolean done = FALSE;
sinks = gst_bin_iterate_sinks (GST_BIN (pipeline));
while (!done) {
gpointer data;
switch (gst_iterator_next (sinks, &data)) {
case GST_ITERATOR_OK:
{
GstElement *element = GST_ELEMENT (data);
GList *eosed;
GstElementState state, pending;
GstElementStateReturn complete;
gchar *name;
complete = gst_element_get_state (element, &state, &pending, NULL);
name = gst_element_get_name (element);
if (complete == GST_STATE_ASYNC) {
GST_DEBUG ("element %s still performing state change", name);
result = FALSE;
done = TRUE;
goto done;
} else if (state != GST_STATE_PLAYING) {
GST_DEBUG ("element %s not playing %d %d", name, state, pending);
goto done;
}
eosed = g_list_find (pipeline->eosed, element);
if (!eosed) {
result = FALSE;
done = TRUE;
}
done:
g_free (name);
gst_object_unref (GST_OBJECT (element));
break;
}
case GST_ITERATOR_RESYNC:
result = TRUE;
gst_iterator_resync (sinks);
break;
case GST_ITERATOR_DONE:
done = TRUE;
break;
default:
g_assert_not_reached ();
break;
}
}
gst_iterator_free (sinks);
return result;
}
/* sending an event on the pipeline pauses the pipeline if it
* was playing.
*/
static gboolean
gst_pipeline_send_event (GstElement * element, GstEvent * event)
{
gboolean was_playing;
gboolean res;
GstElementState state;
/* need to call _get_state() since a bin state is only updated
* with this call. FIXME, we should probably not block but just
* take a snapshot. */
gst_element_get_state (element, &state, NULL, NULL);
was_playing = state == GST_STATE_PLAYING;
if (was_playing && GST_EVENT_TYPE (event) == GST_EVENT_SEEK)
gst_element_set_state (element, GST_STATE_PAUSED);
res = GST_ELEMENT_CLASS (parent_class)->send_event (element, event);
if (was_playing && GST_EVENT_TYPE (event) == GST_EVENT_SEEK)
gst_element_set_state (element, GST_STATE_PLAYING);
return res;
}
/* FIXME, make me threadsafe */
static GstBusSyncReply
pipeline_bus_handler (GstBus * bus, GstMessage * message,
GstPipeline * pipeline)
{
GstBusSyncReply result = GST_BUS_PASS;
gboolean posteos = FALSE;
/* we don't want messages from the streaming thread while we're doing the
* state change. We do want them from the state change functions. */
switch (GST_MESSAGE_TYPE (message)) {
case GST_MESSAGE_EOS:
if (GST_MESSAGE_SRC (message) != GST_OBJECT (pipeline)) {
GST_DEBUG ("got EOS message");
GST_LOCK (bus);
pipeline->eosed =
g_list_prepend (pipeline->eosed, GST_MESSAGE_SRC (message));
GST_UNLOCK (bus);
if (is_eos (pipeline)) {
posteos = TRUE;
}
/* we drop all EOS messages */
result = GST_BUS_DROP;
gst_message_unref (message);
}
break;
case GST_MESSAGE_ERROR:
break;
default:
break;
}
if (posteos) {
gst_bus_post (bus, gst_message_new_eos (GST_OBJECT (pipeline)));
}
return result;
}
/**
* gst_pipeline_new:
* @name: name of new pipeline
*
* Create a new pipeline with the given name.
*
* Returns: newly created GstPipeline
*
* MT safe.
*/
GstElement *
gst_pipeline_new (const gchar * name)
{
return gst_element_factory_make ("pipeline", name);
}
/* MT safe */
static GstElementStateReturn
gst_pipeline_change_state (GstElement * element)
{
GstElementStateReturn result = GST_STATE_SUCCESS;
GstPipeline *pipeline = GST_PIPELINE (element);
gint transition = GST_STATE_TRANSITION (element);
switch (transition) {
case GST_STATE_NULL_TO_READY:
gst_scheduler_setup (GST_ELEMENT_SCHEDULER (pipeline));
break;
case GST_STATE_READY_TO_PAUSED:
{
GstClock *clock;
clock = gst_element_get_clock (element);
gst_element_set_clock (element, clock);
pipeline->eosed = NULL;
break;
}
case GST_STATE_PAUSED_TO_PLAYING:
if (element->clock) {
GstClockTime start_time = gst_clock_get_time (element->clock);
element->base_time = start_time -
pipeline->stream_time + pipeline->delay;
GST_DEBUG ("stream_time=%" GST_TIME_FORMAT ", start_time=%"
GST_TIME_FORMAT, GST_TIME_ARGS (pipeline->stream_time),
GST_TIME_ARGS (start_time));
} else {
element->base_time = 0;
GST_DEBUG ("no clock, using base time of 0");
}
break;
case GST_STATE_PLAYING_TO_PAUSED:
case GST_STATE_PAUSED_TO_READY:
case GST_STATE_READY_TO_NULL:
break;
}
result = GST_ELEMENT_CLASS (parent_class)->change_state (element);
switch (transition) {
case GST_STATE_READY_TO_PAUSED:
pipeline->stream_time = 0;
break;
case GST_STATE_PAUSED_TO_PLAYING:
break;
case GST_STATE_PLAYING_TO_PAUSED:
if (element->clock) {
pipeline->stream_time = gst_clock_get_time (element->clock) -
element->base_time;
}
GST_DEBUG ("stream_time=%" GST_TIME_FORMAT,
GST_TIME_ARGS (pipeline->stream_time));
break;
case GST_STATE_PAUSED_TO_READY:
break;
case GST_STATE_READY_TO_NULL:
break;
}
/* we wait for async state changes ourselves.
* FIXME this can block forever, better do this in a worker
* thread or use a timeout? */
if (result == GST_STATE_ASYNC) {
GTimeVal *timeval, timeout;
GST_STATE_UNLOCK (pipeline);
GST_LOCK (pipeline);
if (pipeline->play_timeout > 0) {
GST_TIME_TO_TIMEVAL (pipeline->play_timeout, timeout);
timeval = &timeout;
} else {
timeval = NULL;
}
GST_UNLOCK (pipeline);
result = gst_element_get_state (element, NULL, NULL, timeval);
GST_STATE_LOCK (pipeline);
}
return result;
}
/**
* gst_pipeline_get_scheduler:
* @pipeline: the pipeline
*
* Gets the #GstScheduler of this pipeline.
*
* Returns: a GstScheduler.
*
* MT safe.
*/
GstScheduler *
gst_pipeline_get_scheduler (GstPipeline * pipeline)
{
return gst_element_get_scheduler (GST_ELEMENT (pipeline));
}
/**
* gst_pipeline_get_bus:
* @pipeline: the pipeline
*
* Gets the #GstBus of this pipeline.
*
* Returns: a GstBus
*
* MT safe.
*/
GstBus *
gst_pipeline_get_bus (GstPipeline * pipeline)
{
return gst_element_get_bus (GST_ELEMENT (pipeline));
}
static GstClock *
gst_pipeline_get_clock_func (GstElement * element)
{
GstClock *clock = NULL;
GstPipeline *pipeline = GST_PIPELINE (element);
/* if we have a fixed clock, use that one */
GST_LOCK (pipeline);
if (GST_FLAG_IS_SET (pipeline, GST_PIPELINE_FLAG_FIXED_CLOCK)) {
clock = pipeline->fixed_clock;
gst_object_ref (GST_OBJECT (clock));
GST_UNLOCK (pipeline);
GST_CAT_DEBUG (GST_CAT_CLOCK, "pipeline using fixed clock %p (%s)",
clock, clock ? GST_STR_NULL (GST_OBJECT_NAME (clock)) : "-");
} else {
GST_UNLOCK (pipeline);
clock =
GST_ELEMENT_CLASS (parent_class)->get_clock (GST_ELEMENT (pipeline));
/* no clock, use a system clock */
if (!clock) {
clock = gst_system_clock_obtain ();
/* we unref since this function is not supposed to increase refcount
* of clock object returned; this is ok since the systemclock always
* has a refcount of at least one in the current code. */
gst_object_unref (GST_OBJECT (clock));
GST_CAT_DEBUG (GST_CAT_CLOCK, "pipeline obtained system clock: %p (%s)",
clock, clock ? GST_STR_NULL (GST_OBJECT_NAME (clock)) : "-");
} else {
GST_CAT_DEBUG (GST_CAT_CLOCK, "pipeline obtained clock: %p (%s)",
clock, clock ? GST_STR_NULL (GST_OBJECT_NAME (clock)) : "-");
}
}
return clock;
}
/**
* gst_pipeline_get_clock:
* @pipeline: the pipeline
*
* Gets the current clock used by the pipeline.
*
* Returns: a GstClock
*/
GstClock *
gst_pipeline_get_clock (GstPipeline * pipeline)
{
g_return_val_if_fail (GST_IS_PIPELINE (pipeline), NULL);
return gst_pipeline_get_clock_func (GST_ELEMENT (pipeline));
}
/**
* gst_pipeline_use_clock:
* @pipeline: the pipeline
* @clock: the clock to use
*
* Force the pipeline to use the given clock. The pipeline will
* always use the given clock even if new clock providers are added
* to this pipeline.
*
* MT safe.
*/
void
gst_pipeline_use_clock (GstPipeline * pipeline, GstClock * clock)
{
g_return_if_fail (GST_IS_PIPELINE (pipeline));
GST_LOCK (pipeline);
GST_FLAG_SET (pipeline, GST_PIPELINE_FLAG_FIXED_CLOCK);
gst_object_replace ((GstObject **) & pipeline->fixed_clock,
(GstObject *) clock);
GST_UNLOCK (pipeline);
GST_CAT_DEBUG (GST_CAT_CLOCK, "pipeline using fixed clock %p (%s)", clock,
(clock ? GST_OBJECT_NAME (clock) : "nil"));
}
/**
* gst_pipeline_set_clock:
* @pipeline: the pipeline
* @clock: the clock to set
*
* Set the clock for the pipeline. The clock will be distributed
* to all the elements managed by the pipeline.
*
* MT safe.
*/
void
gst_pipeline_set_clock (GstPipeline * pipeline, GstClock * clock)
{
g_return_if_fail (pipeline != NULL);
g_return_if_fail (GST_IS_PIPELINE (pipeline));
GST_ELEMENT_CLASS (parent_class)->set_clock (GST_ELEMENT (pipeline), clock);
}
/**
* gst_pipeline_auto_clock:
* @pipeline: the pipeline
*
* Let the pipeline select a clock automatically.
*
* MT safe.
*/
void
gst_pipeline_auto_clock (GstPipeline * pipeline)
{
g_return_if_fail (pipeline != NULL);
g_return_if_fail (GST_IS_PIPELINE (pipeline));
GST_LOCK (pipeline);
GST_FLAG_UNSET (pipeline, GST_PIPELINE_FLAG_FIXED_CLOCK);
gst_object_replace ((GstObject **) & pipeline->fixed_clock, NULL);
GST_UNLOCK (pipeline);
GST_CAT_DEBUG (GST_CAT_CLOCK, "pipeline using automatic clock");
}