mirror of
https://gitlab.freedesktop.org/gstreamer/gstreamer.git
synced 2024-12-11 02:46:33 +00:00
355 lines
8.5 KiB
C
355 lines
8.5 KiB
C
/*
|
|
* Copyright (C) 2008 Ole André Vadla Ravnås <ole.andre.ravnas@tandberg.com>
|
|
*
|
|
* 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., 51 Franklin St, Fifth Floor,
|
|
* Boston, MA 02110-1301, USA.
|
|
*/
|
|
|
|
#include "gstksclock.h"
|
|
|
|
#include "kshelpers.h"
|
|
|
|
GST_DEBUG_CATEGORY_EXTERN (gst_ks_debug);
|
|
#define GST_CAT_DEFAULT gst_ks_debug
|
|
|
|
struct _GstKsClockPrivate
|
|
{
|
|
GMutex mutex;
|
|
GCond client_cond;
|
|
GCond worker_cond;
|
|
|
|
HANDLE clock_handle;
|
|
|
|
gboolean open;
|
|
gboolean closing;
|
|
KSSTATE state;
|
|
|
|
GThread *worker_thread;
|
|
gboolean worker_running;
|
|
gboolean worker_initialized;
|
|
|
|
GstClock *master_clock;
|
|
};
|
|
|
|
#define GST_KS_CLOCK_GET_PRIVATE(o) ((o)->priv)
|
|
|
|
#define GST_KS_CLOCK_LOCK() g_mutex_lock (&priv->mutex)
|
|
#define GST_KS_CLOCK_UNLOCK() g_mutex_unlock (&priv->mutex)
|
|
|
|
static void gst_ks_clock_dispose (GObject * object);
|
|
static void gst_ks_clock_finalize (GObject * object);
|
|
|
|
G_DEFINE_TYPE (GstKsClock, gst_ks_clock, G_TYPE_OBJECT);
|
|
|
|
static GstKsClockClass *parent_class = NULL;
|
|
|
|
|
|
static void
|
|
gst_ks_clock_class_init (GstKsClockClass * klass)
|
|
{
|
|
GObjectClass *gobject_class = G_OBJECT_CLASS (klass);
|
|
|
|
parent_class = g_type_class_peek_parent (klass);
|
|
|
|
g_type_class_add_private (klass, sizeof (GstKsClockPrivate));
|
|
|
|
gobject_class->dispose = gst_ks_clock_dispose;
|
|
gobject_class->finalize = gst_ks_clock_finalize;
|
|
}
|
|
|
|
static void
|
|
gst_ks_clock_init (GstKsClock * self)
|
|
{
|
|
GstKsClockPrivate *priv;
|
|
|
|
self->priv = G_TYPE_INSTANCE_GET_PRIVATE (self, GST_TYPE_KS_CLOCK,
|
|
GstKsClockPrivate);
|
|
|
|
priv = GST_KS_CLOCK_GET_PRIVATE (self);
|
|
|
|
g_mutex_init (&priv->mutex);
|
|
g_cond_init (&priv->client_cond);
|
|
g_cond_init (&priv->worker_cond);
|
|
|
|
priv->clock_handle = INVALID_HANDLE_VALUE;
|
|
|
|
priv->open = FALSE;
|
|
priv->closing = FALSE;
|
|
priv->state = KSSTATE_STOP;
|
|
|
|
priv->worker_thread = NULL;
|
|
priv->worker_running = FALSE;
|
|
priv->worker_initialized = FALSE;
|
|
|
|
priv->master_clock = NULL;
|
|
}
|
|
|
|
static void
|
|
gst_ks_clock_dispose (GObject * object)
|
|
{
|
|
g_assert (!GST_KS_CLOCK_GET_PRIVATE (GST_KS_CLOCK (object))->open);
|
|
|
|
G_OBJECT_CLASS (parent_class)->dispose (object);
|
|
}
|
|
|
|
static void
|
|
gst_ks_clock_finalize (GObject * object)
|
|
{
|
|
GstKsClock *self = GST_KS_CLOCK (object);
|
|
GstKsClockPrivate *priv = GST_KS_CLOCK_GET_PRIVATE (self);
|
|
|
|
g_cond_clear (&priv->worker_cond);
|
|
g_cond_clear (&priv->client_cond);
|
|
g_mutex_clear (&priv->mutex);
|
|
|
|
G_OBJECT_CLASS (parent_class)->finalize (object);
|
|
}
|
|
|
|
static void gst_ks_clock_close_unlocked (GstKsClock * self);
|
|
|
|
gboolean
|
|
gst_ks_clock_open (GstKsClock * self)
|
|
{
|
|
GstKsClockPrivate *priv = GST_KS_CLOCK_GET_PRIVATE (self);
|
|
GList *devices;
|
|
KsDeviceEntry *device;
|
|
KSSTATE state;
|
|
|
|
GST_KS_CLOCK_LOCK ();
|
|
|
|
g_assert (!priv->open);
|
|
|
|
priv->state = KSSTATE_STOP;
|
|
|
|
devices = ks_enumerate_devices (&KSCATEGORY_CLOCK);
|
|
if (devices == NULL)
|
|
goto error;
|
|
|
|
device = devices->data;
|
|
|
|
priv->clock_handle = CreateFile (device->path, GENERIC_READ | GENERIC_WRITE,
|
|
0, NULL, OPEN_EXISTING, FILE_ATTRIBUTE_NORMAL | FILE_FLAG_OVERLAPPED,
|
|
NULL);
|
|
if (!ks_is_valid_handle (priv->clock_handle))
|
|
goto error;
|
|
|
|
state = KSSTATE_STOP;
|
|
if (!ks_object_set_property (priv->clock_handle, KSPROPSETID_Clock,
|
|
KSPROPERTY_CLOCK_STATE, &state, sizeof (state), NULL))
|
|
goto error;
|
|
|
|
ks_device_list_free (devices);
|
|
priv->open = TRUE;
|
|
|
|
GST_KS_CLOCK_UNLOCK ();
|
|
return TRUE;
|
|
|
|
error:
|
|
ks_device_list_free (devices);
|
|
gst_ks_clock_close_unlocked (self);
|
|
|
|
GST_KS_CLOCK_UNLOCK ();
|
|
return FALSE;
|
|
}
|
|
|
|
static gboolean
|
|
gst_ks_clock_set_state_unlocked (GstKsClock * self, KSSTATE state)
|
|
{
|
|
GstKsClockPrivate *priv = GST_KS_CLOCK_GET_PRIVATE (self);
|
|
KSSTATE initial_state;
|
|
gint addend;
|
|
|
|
g_assert (priv->open);
|
|
|
|
if (state == priv->state)
|
|
return TRUE;
|
|
|
|
initial_state = priv->state;
|
|
addend = (state > priv->state) ? 1 : -1;
|
|
|
|
GST_DEBUG ("Initiating clock state change from %s to %s",
|
|
ks_state_to_string (priv->state), ks_state_to_string (state));
|
|
|
|
while (priv->state != state) {
|
|
KSSTATE next_state = priv->state + addend;
|
|
|
|
GST_DEBUG ("Changing clock state from %s to %s",
|
|
ks_state_to_string (priv->state), ks_state_to_string (next_state));
|
|
|
|
if (ks_object_set_property (priv->clock_handle, KSPROPSETID_Clock,
|
|
KSPROPERTY_CLOCK_STATE, &next_state, sizeof (next_state), NULL)) {
|
|
priv->state = next_state;
|
|
|
|
GST_DEBUG ("Changed clock state to %s", ks_state_to_string (priv->state));
|
|
} else {
|
|
GST_WARNING ("Failed to change clock state to %s",
|
|
ks_state_to_string (next_state));
|
|
return FALSE;
|
|
}
|
|
}
|
|
|
|
GST_DEBUG ("Finished clock state change from %s to %s",
|
|
ks_state_to_string (initial_state), ks_state_to_string (state));
|
|
|
|
return TRUE;
|
|
}
|
|
|
|
static void
|
|
gst_ks_clock_close_unlocked (GstKsClock * self)
|
|
{
|
|
GstKsClockPrivate *priv = GST_KS_CLOCK_GET_PRIVATE (self);
|
|
|
|
if (priv->closing)
|
|
return;
|
|
|
|
priv->closing = TRUE;
|
|
|
|
if (priv->worker_thread != NULL) {
|
|
priv->worker_running = FALSE;
|
|
g_cond_signal (&priv->worker_cond);
|
|
|
|
GST_KS_CLOCK_UNLOCK ();
|
|
g_thread_join (priv->worker_thread);
|
|
priv->worker_thread = NULL;
|
|
GST_KS_CLOCK_LOCK ();
|
|
}
|
|
|
|
if (priv->open)
|
|
gst_ks_clock_set_state_unlocked (self, KSSTATE_STOP);
|
|
|
|
if (ks_is_valid_handle (priv->clock_handle)) {
|
|
CloseHandle (priv->clock_handle);
|
|
priv->clock_handle = INVALID_HANDLE_VALUE;
|
|
}
|
|
|
|
if (priv->master_clock != NULL) {
|
|
gst_object_unref (priv->master_clock);
|
|
priv->master_clock = NULL;
|
|
}
|
|
|
|
priv->open = FALSE;
|
|
priv->closing = FALSE;
|
|
}
|
|
|
|
void
|
|
gst_ks_clock_close (GstKsClock * self)
|
|
{
|
|
GstKsClockPrivate *priv = GST_KS_CLOCK_GET_PRIVATE (self);
|
|
|
|
GST_KS_CLOCK_LOCK ();
|
|
gst_ks_clock_close_unlocked (self);
|
|
GST_KS_CLOCK_UNLOCK ();
|
|
}
|
|
|
|
HANDLE
|
|
gst_ks_clock_get_handle (GstKsClock * self)
|
|
{
|
|
GstKsClockPrivate *priv = GST_KS_CLOCK_GET_PRIVATE (self);
|
|
HANDLE handle;
|
|
|
|
GST_KS_CLOCK_LOCK ();
|
|
g_assert (priv->open);
|
|
handle = priv->clock_handle;
|
|
GST_KS_CLOCK_UNLOCK ();
|
|
|
|
return handle;
|
|
}
|
|
|
|
void
|
|
gst_ks_clock_prepare (GstKsClock * self)
|
|
{
|
|
GstKsClockPrivate *priv = GST_KS_CLOCK_GET_PRIVATE (self);
|
|
|
|
GST_KS_CLOCK_LOCK ();
|
|
if (priv->state < KSSTATE_PAUSE)
|
|
gst_ks_clock_set_state_unlocked (self, KSSTATE_PAUSE);
|
|
GST_KS_CLOCK_UNLOCK ();
|
|
}
|
|
|
|
static gpointer
|
|
gst_ks_clock_worker_thread_func (gpointer data)
|
|
{
|
|
GstKsClock *self = GST_KS_CLOCK (data);
|
|
GstKsClockPrivate *priv = GST_KS_CLOCK_GET_PRIVATE (self);
|
|
|
|
GST_KS_CLOCK_LOCK ();
|
|
|
|
gst_ks_clock_set_state_unlocked (self, KSSTATE_RUN);
|
|
|
|
while (priv->worker_running) {
|
|
if (priv->master_clock != NULL) {
|
|
GstClockTime now = gst_clock_get_time (priv->master_clock);
|
|
now /= 100;
|
|
|
|
if (ks_object_set_property (priv->clock_handle, KSPROPSETID_Clock,
|
|
KSPROPERTY_CLOCK_TIME, &now, sizeof (now), NULL)) {
|
|
GST_DEBUG ("clock synchronized");
|
|
gst_object_unref (priv->master_clock);
|
|
priv->master_clock = NULL;
|
|
} else {
|
|
GST_WARNING ("failed to synchronize clock");
|
|
}
|
|
}
|
|
|
|
if (!priv->worker_initialized) {
|
|
priv->worker_initialized = TRUE;
|
|
g_cond_signal (&priv->client_cond);
|
|
}
|
|
|
|
g_cond_wait (&priv->worker_cond, &priv->mutex);
|
|
}
|
|
|
|
priv->worker_initialized = FALSE;
|
|
GST_KS_CLOCK_UNLOCK ();
|
|
|
|
return NULL;
|
|
}
|
|
|
|
void
|
|
gst_ks_clock_start (GstKsClock * self)
|
|
{
|
|
GstKsClockPrivate *priv = GST_KS_CLOCK_GET_PRIVATE (self);
|
|
|
|
GST_KS_CLOCK_LOCK ();
|
|
|
|
if (priv->worker_thread == NULL) {
|
|
priv->worker_running = TRUE;
|
|
priv->worker_initialized = FALSE;
|
|
|
|
priv->worker_thread =
|
|
g_thread_new ("ks-worker", gst_ks_clock_worker_thread_func, self);
|
|
}
|
|
|
|
while (!priv->worker_initialized)
|
|
g_cond_wait (&priv->client_cond, &priv->mutex);
|
|
|
|
GST_KS_CLOCK_UNLOCK ();
|
|
}
|
|
|
|
void
|
|
gst_ks_clock_provide_master_clock (GstKsClock * self, GstClock * master_clock)
|
|
{
|
|
GstKsClockPrivate *priv = GST_KS_CLOCK_GET_PRIVATE (self);
|
|
|
|
GST_KS_CLOCK_LOCK ();
|
|
|
|
gst_object_ref (master_clock);
|
|
if (priv->master_clock != NULL)
|
|
gst_object_unref (priv->master_clock);
|
|
priv->master_clock = master_clock;
|
|
g_cond_signal (&priv->worker_cond);
|
|
|
|
GST_KS_CLOCK_UNLOCK ();
|
|
}
|