gstreamer/libs/gst/control/dparammanager.c
Stefan Kost 0b2f71302d added more documenation comments to the control library
Original commit message from CVS:
added more documenation comments to the control library
2004-07-15 12:51:59 +00:00

1088 lines
31 KiB
C

/* GStreamer
* Copyright (C) 2001 Steve Baker <stevebaker_org@yahoo.co.uk>
*
* gstdparammanager.c: Dynamic Parameter group functionality
*
* 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 "dparammanager.h"
#include <gst/gstelement.h>
#include <gst/gstmarshal.h>
#include <gst/gstinfo.h>
GST_DEBUG_CATEGORY_EXTERN (_gst_control_debug);
#define GST_CAT_DEFAULT _gst_control_debug
static GHashTable *_element_registry = NULL;
static gboolean _gst_dpman_init_done = FALSE;
enum
{
NEW_REQUIRED_DPARAM,
LAST_SIGNAL
};
static void gst_dpman_class_init (GstDParamManagerClass * klass);
static void gst_dpman_init (GstDParamManager * dpman);
static void gst_dpman_dispose (GObject * object);
static GstDParamWrapper *gst_dpman_new_wrapper (GstDParamManager * dpman,
GParamSpec * param_spec, gchar * unit_name,
GstDPMUpdateMethod update_method);
static GstDParamWrapper *gst_dpman_get_wrapper (GstDParamManager * dpman,
const gchar * dparam_name);
static void gst_dpman_state_change (GstElement * element, gint old_state,
gint new_state, GstDParamManager * dpman);
static gboolean gst_dpman_preprocess_synchronous (GstDParamManager * dpman,
guint frames, gint64 timestamp);
static gboolean gst_dpman_preprocess_asynchronous (GstDParamManager * dpman,
guint frames, gint64 timestamp);
static gboolean gst_dpman_process_asynchronous (GstDParamManager * dpman,
guint frame_count);
static gboolean gst_dpman_preprocess_noop (GstDParamManager * dpman,
guint frames, gint64 timestamp);
static gboolean gst_dpman_process_noop (GstDParamManager * dpman,
guint frame_count);
static void gst_dpman_setup_synchronous (GstDParamManager * dpman);
static void gst_dpman_setup_asynchronous (GstDParamManager * dpman);
static void gst_dpman_setup_disabled (GstDParamManager * dpman);
static void gst_dpman_teardown_synchronous (GstDParamManager * dpman);
static void gst_dpman_teardown_asynchronous (GstDParamManager * dpman);
static void gst_dpman_teardown_disabled (GstDParamManager * dpman);
static GObjectClass *parent_class;
static guint gst_dpman_signals[LAST_SIGNAL] = { 0 };
void
_gst_dpman_initialize ()
{
if (_gst_dpman_init_done)
return;
_gst_dpman_init_done = TRUE;
_element_registry = g_hash_table_new (NULL, NULL);
}
GType
gst_dpman_get_type (void)
{
static GType dpman_type = 0;
if (!dpman_type) {
static const GTypeInfo dpman_info = {
sizeof (GstDParamManagerClass),
NULL,
NULL,
(GClassInitFunc) gst_dpman_class_init,
NULL,
NULL,
sizeof (GstDParamManager),
0,
(GInstanceInitFunc) gst_dpman_init,
};
dpman_type =
g_type_register_static (GST_TYPE_OBJECT, "GstDParamManager",
&dpman_info, 0);
}
return dpman_type;
}
static void
gst_dpman_class_init (GstDParamManagerClass * klass)
{
GstObjectClass *gstobject_class;
GObjectClass *gobject_class;
parent_class = g_type_class_peek_parent (klass);
gstobject_class = (GstObjectClass *) klass;
gobject_class = (GObjectClass *) klass;
gobject_class->dispose = gst_dpman_dispose;
klass->modes = g_hash_table_new (g_str_hash, g_str_equal);
gst_dpman_register_mode (klass, "synchronous",
gst_dpman_preprocess_synchronous, gst_dpman_process_noop,
gst_dpman_setup_synchronous, gst_dpman_teardown_synchronous);
gst_dpman_register_mode (klass, "asynchronous",
gst_dpman_preprocess_asynchronous, gst_dpman_process_asynchronous,
gst_dpman_setup_asynchronous, gst_dpman_teardown_asynchronous);
gst_dpman_register_mode (klass, "disabled",
gst_dpman_preprocess_noop, gst_dpman_process_noop,
gst_dpman_setup_disabled, gst_dpman_teardown_disabled);
gst_dpman_signals[NEW_REQUIRED_DPARAM] =
g_signal_new ("new-required-dparam", G_TYPE_FROM_CLASS (klass),
G_SIGNAL_RUN_LAST, G_STRUCT_OFFSET (GstDParamManagerClass,
new_required_dparam), NULL, NULL, gst_marshal_VOID__STRING,
G_TYPE_NONE, 1, G_TYPE_STRING);
}
static void
gst_dpman_init (GstDParamManager * dpman)
{
GST_DPMAN_DPARAMS (dpman) = g_hash_table_new (g_str_hash, g_str_equal);
GST_DPMAN_DPARAMS_LIST (dpman) = NULL;
GST_DPMAN_PARENT (dpman) = NULL;
GST_DPMAN_MODE_NAME (dpman) = NULL;
GST_DPMAN_MODE (dpman) = NULL;
GST_DPMAN_RATE (dpman) = 0;
}
/**
* gst_dpman_new:
* @name: name of the new #GstDParamManager instance to create
* @parent: #GstElement which creates this instance
*
* Creates a new instance of a dynamic parameter manager.
*
* Returns: a new instance of #GstDParamManager.
*/
GstDParamManager *
gst_dpman_new (gchar * name, GstElement * parent)
{
GstDParamManager *dpman;
g_return_val_if_fail (name != NULL, NULL);
dpman = g_object_new (gst_dpman_get_type (), NULL);
gst_object_set_name (GST_OBJECT (dpman), name);
gst_dpman_set_parent (dpman, parent);
gst_dpman_set_mode (dpman, "disabled");
return dpman;
}
static void
gst_dpman_dispose (GObject * object)
{
/* GstDParamManager *dpman = GST_DPMAN(object); */
G_OBJECT_CLASS (parent_class)->dispose (object);
}
/**
* gst_dpman_add_required_dparam_callback:
* @dpman: GstDParamManager instance
* @param_spec: the spacification of the new dparam
* @unit_name: the unit name of the dparam
* @update_func: callback to update the element with the new value
* @update_data: will be included in the call to update_func
*
* Add a mandatory dynamic parameter to the manager, where the value can be
* updated by calling the supplied callback function.
*
* Returns: true if it was successfully added
*/
gboolean
gst_dpman_add_required_dparam_callback (GstDParamManager * dpman,
GParamSpec * param_spec,
gchar * unit_name, GstDPMUpdateFunction update_func, gpointer update_data)
{
GstDParamWrapper *dpwrap;
g_return_val_if_fail (dpman != NULL, FALSE);
g_return_val_if_fail (GST_IS_DPMAN (dpman), FALSE);
g_return_val_if_fail (update_func != NULL, FALSE);
dpwrap =
gst_dpman_new_wrapper (dpman, param_spec, unit_name, GST_DPMAN_CALLBACK);
g_return_val_if_fail (dpwrap != NULL, FALSE);
GST_DEBUG ("adding required callback dparam '%s'",
g_param_spec_get_name (param_spec));
dpwrap->update_func = update_func;
dpwrap->update_data = update_data;
g_signal_emit (G_OBJECT (dpman), gst_dpman_signals[NEW_REQUIRED_DPARAM], 0,
g_param_spec_get_name (param_spec));
return TRUE;
}
/**
* gst_dpman_add_required_dparam_direct:
* @dpman: GstDParamManager instance
* @param_spec: the spacification of the new dparam
* @unit_name: the unit name of the dparam
* @update_data: pointer to the member to be updated
*
* Add a mandatory dynamic parameter to the manager, where the value can be
* updated by directly storing it into the provided memory location.
*
* Returns: true if it was successfully added
*/
gboolean
gst_dpman_add_required_dparam_direct (GstDParamManager * dpman,
GParamSpec * param_spec, gchar * unit_name, gpointer update_data)
{
GstDParamWrapper *dpwrap;
g_return_val_if_fail (dpman != NULL, FALSE);
g_return_val_if_fail (GST_IS_DPMAN (dpman), FALSE);
g_return_val_if_fail (update_data != NULL, FALSE);
dpwrap =
gst_dpman_new_wrapper (dpman, param_spec, unit_name, GST_DPMAN_DIRECT);
g_return_val_if_fail (dpwrap != NULL, FALSE);
GST_DEBUG ("adding required direct dparam '%s'",
g_param_spec_get_name (param_spec));
dpwrap->update_data = update_data;
g_signal_emit (G_OBJECT (dpman), gst_dpman_signals[NEW_REQUIRED_DPARAM], 0,
g_param_spec_get_name (param_spec));
return TRUE;
}
/**
* gst_dpman_add_required_dparam_array:
* @dpman: GstDParamManager instance
* @param_spec: the spacification of the new dparam
* @unit_name: the unit name of the dparam
* @update_data: pointer to where the array will be stored
*
* Add a mandatory dynamic parameter to the manager, where the values can be
* updated by storing them into the provided memory location.
*
* Returns: true if it was successfully added
*/
gboolean
gst_dpman_add_required_dparam_array (GstDParamManager * dpman,
GParamSpec * param_spec, gchar * unit_name, gpointer update_data)
{
GstDParamWrapper *dpwrap;
g_return_val_if_fail (dpman != NULL, FALSE);
g_return_val_if_fail (GST_IS_DPMAN (dpman), FALSE);
g_return_val_if_fail (update_data != NULL, FALSE);
dpwrap =
gst_dpman_new_wrapper (dpman, param_spec, unit_name, GST_DPMAN_ARRAY);
g_return_val_if_fail (dpwrap != NULL, FALSE);
GST_DEBUG ("adding required array dparam '%s'",
g_param_spec_get_name (param_spec));
dpwrap->update_data = update_data;
g_signal_emit (G_OBJECT (dpman), gst_dpman_signals[NEW_REQUIRED_DPARAM], 0,
g_param_spec_get_name (param_spec));
return TRUE;
}
/**
* gst_dpman_remove_required_dparam:
* @dpman: GstDParamManager instance
* @dparam_name: the name of an existing parameter
*
* Removes the named dynamic parameter from the manager.
*/
void
gst_dpman_remove_required_dparam (GstDParamManager * dpman,
const gchar * dparam_name)
{
GstDParamWrapper *dpwrap;
g_return_if_fail (dpman != NULL);
g_return_if_fail (GST_IS_DPMAN (dpman));
g_return_if_fail (dparam_name != NULL);
dpwrap = gst_dpman_get_wrapper (dpman, dparam_name);
g_return_if_fail (dpwrap != NULL);
g_return_if_fail (dpwrap->dparam == NULL);
GST_DEBUG ("removing required dparam: %s", dparam_name);
g_hash_table_remove (GST_DPMAN_DPARAMS (dpman), dparam_name);
GST_DPMAN_DPARAMS_LIST (dpman) =
g_list_remove (GST_DPMAN_DPARAMS_LIST (dpman), dpwrap);
g_free (dpwrap->value);
g_free (dpwrap);
}
/**
* gst_dpman_attach_dparam:
* @dpman: GstDParamManager instance
* @dparam_name: a name previously added with gst_dpman_add_required_dparam
* @dparam: GstDParam instance to attach
*
* Adding a parameter controller to a dynamic parameter. Whenever the controller
* changes, the dynamic parameter of the GstElement will follow.
*
* Returns: true if it was successfully attached
*/
gboolean
gst_dpman_attach_dparam (GstDParamManager * dpman, const gchar * dparam_name,
GstDParam * dparam)
{
GstDParamWrapper *dpwrap;
g_return_val_if_fail (dpman != NULL, FALSE);
g_return_val_if_fail (GST_IS_DPMAN (dpman), FALSE);
g_return_val_if_fail (dparam_name != NULL, FALSE);
g_return_val_if_fail (dparam != NULL, FALSE);
g_return_val_if_fail (GST_IS_DPARAM (dparam), FALSE);
g_return_val_if_fail (dparam != NULL, FALSE);
dpwrap = gst_dpman_get_wrapper (dpman, dparam_name);
g_return_val_if_fail (dpwrap != NULL, FALSE);
g_return_val_if_fail (dpwrap->value != NULL, FALSE);
g_return_val_if_fail (G_PARAM_SPEC_VALUE_TYPE (dpwrap->param_spec) ==
GST_DPARAM_TYPE (dparam), FALSE);
dpwrap->dparam = dparam;
gst_dparam_attach (dparam, dpman, dpwrap->param_spec, dpwrap->unit_name);
return TRUE;
}
/**
* gst_dpman_detach_dparam:
* @dpman: GstDParamManager instance
* @dparam_name: the name of a parameter with a previously attached GstDParam
*
* Removing a parameter controller from a dynamic parameter.
*/
void
gst_dpman_detach_dparam (GstDParamManager * dpman, const gchar * dparam_name)
{
GstDParamWrapper *dpwrap;
g_return_if_fail (dpman != NULL);
g_return_if_fail (GST_IS_DPMAN (dpman));
g_return_if_fail (dparam_name != NULL);
dpwrap = gst_dpman_get_wrapper (dpman, dparam_name);
g_return_if_fail (dpwrap);
gst_dparam_detach (dpwrap->dparam);
dpwrap->dparam = NULL;
}
/**
* gst_dpman_get_dparam:
* @dpman: GstDParamManager instance
* @dparam_name: the name of an existing dparam instance
*
* Fetches a dparam object that is registered by manager under the given name.
*
* Returns: the dparam with the given name - or NULL otherwise
*/
GstDParam *
gst_dpman_get_dparam (GstDParamManager * dpman, const gchar * dparam_name)
{
GstDParamWrapper *dpwrap;
g_return_val_if_fail (dpman != NULL, NULL);
g_return_val_if_fail (GST_IS_DPMAN (dpman), NULL);
g_return_val_if_fail (dparam_name != NULL, NULL);
dpwrap = gst_dpman_get_wrapper (dpman, dparam_name);
g_return_val_if_fail (dpwrap != NULL, NULL);
return dpwrap->dparam;
}
/**
* gst_dpman_get_dparam_type:
* @dpman: GstDParamManager instance
* @dparam_name: the name of dparam
*
* Fetches the type of the supplied dynamic parameter.
*
* Returns: the type that this dparam requires/uses
*/
GType
gst_dpman_get_dparam_type (GstDParamManager * dpman, const gchar * dparam_name)
{
GstDParamWrapper *dpwrap;
g_return_val_if_fail (dpman != NULL, 0);
g_return_val_if_fail (GST_IS_DPMAN (dpman), 0);
g_return_val_if_fail (dparam_name != NULL, 0);
dpwrap = gst_dpman_get_wrapper (dpman, dparam_name);
g_return_val_if_fail (dpwrap != NULL, 0);
return G_VALUE_TYPE (dpwrap->value);
}
/**
* gst_dpman_list_dparam_specs:
* @dpman: GstDParamManager instance
*
* Fetches the list of parameter specifications, that this manager maintains.
*
* Returns: the the parameter specifications as a NULL terminated array
*/
GParamSpec **
gst_dpman_list_dparam_specs (GstDParamManager * dpman)
{
GstDParamWrapper *dpwrap;
GList *dwraps;
GParamSpec **param_specs;
guint x = 0;
g_return_val_if_fail (dpman != NULL, NULL);
g_return_val_if_fail (GST_IS_DPMAN (dpman), NULL);
dwraps = GST_DPMAN_DPARAMS_LIST (dpman);
param_specs = g_new0 (GParamSpec *, g_list_length (dwraps) + 1);
while (dwraps) {
dpwrap = (GstDParamWrapper *) dwraps->data;
param_specs[x++] = dpwrap->param_spec;
dwraps = g_list_next (dwraps);
}
return param_specs;
}
/**
* gst_dpman_get_param_spec:
* @dpman: GstDParamManager instance
* @dparam_name: the name of dparam
*
* Fetches a single parameter specification by its dparam name.
*
* Returns: the the parameter specifications for a given name
*/
GParamSpec *
gst_dpman_get_param_spec (GstDParamManager * dpman, const gchar * dparam_name)
{
GstDParamWrapper *dpwrap;
g_return_val_if_fail (dpman != NULL, NULL);
g_return_val_if_fail (GST_IS_DPMAN (dpman), NULL);
g_return_val_if_fail (dparam_name != NULL, NULL);
dpwrap = gst_dpman_get_wrapper (dpman, dparam_name);
return dpwrap->param_spec;
}
/**
* gst_dpman_set_rate:
* @dpman: GstDParamManager instance
* @rate: the new the frame/sample rate
*
* Sets the frame or sampling rate used by the machine.
*
*/
void
gst_dpman_set_rate (GstDParamManager * dpman, gint rate)
{
g_return_if_fail (GST_IS_DPMAN (dpman));
GST_DPMAN_RATE (dpman) = rate;
}
/**
* gst_dpman_register_mode
* @klass: GstDParamManagerClass class instance
* @modename: the unique name of the new mode
* @preprocessfunc: the function which will be called before each buffer is processed
* @processfunc: the function which may be called throughout the processing of a buffer
* @setupfunc: the function which initialises the mode when activated
* @teardownfunc: the function which frees any resources the mode uses
*
* Registers a run-mode for the dparam manager. Each such mode has a defined
* run-time behaviour - that is, they differ in the way dynamic parameter
* changes are pushed into the underlying GstElements.
*
*/
void
gst_dpman_register_mode (GstDParamManagerClass * klass,
gchar * modename,
GstDPMModePreProcessFunction preprocessfunc,
GstDPMModeProcessFunction processfunc,
GstDPMModeSetupFunction setupfunc, GstDPMModeTeardownFunction teardownfunc)
{
GstDPMMode *mode;
g_return_if_fail (klass != NULL);
g_return_if_fail (modename != NULL);
g_return_if_fail (GST_IS_DPMAN_CLASS (klass));
mode = g_new0 (GstDPMMode, 1);
mode->preprocessfunc = preprocessfunc;
mode->processfunc = processfunc;
mode->setupfunc = setupfunc;
mode->teardownfunc = teardownfunc;
g_hash_table_insert (klass->modes, modename, mode);
}
/**
* gst_dpman_set_mode
* @dpman: GstDParamManager instance
* @modename: the name of the mode to use
*
* Activate one of the registered modes.
*
* Returns: TRUE if the mode was set, FALSE otherwise
*/
gboolean
gst_dpman_set_mode (GstDParamManager * dpman, gchar * modename)
{
GstDPMMode *mode = NULL;
GstDParamManagerClass *oclass;
g_return_val_if_fail (dpman != NULL, FALSE);
g_return_val_if_fail (GST_IS_DPMAN (dpman), FALSE);
g_return_val_if_fail (modename != NULL, FALSE);
oclass = (GstDParamManagerClass *) (G_OBJECT_GET_CLASS (dpman));
mode = g_hash_table_lookup (oclass->modes, modename);
g_return_val_if_fail (mode != NULL, FALSE);
if (GST_DPMAN_MODE (dpman) == mode) {
GST_DEBUG ("mode %s already set", modename);
return TRUE;
}
GST_DEBUG ("setting mode to %s", modename);
if (GST_DPMAN_MODE (dpman) && GST_DPMAN_TEARDOWNFUNC (dpman)) {
GST_DPMAN_TEARDOWNFUNC (dpman) (dpman);
}
GST_DPMAN_MODE (dpman) = mode;
if (GST_DPMAN_SETUPFUNC (dpman)) {
GST_DPMAN_SETUPFUNC (dpman) (dpman);
}
return TRUE;
}
/**
* gst_dpman_set_parent
* @dpman: GstDParamManager instance
* @parent: the element that this GstDParamManager belongs to
*
* Set a GstElement that parameters this manager should handle.
*/
void
gst_dpman_set_parent (GstDParamManager * dpman, GstElement * parent)
{
g_return_if_fail (dpman != NULL);
g_return_if_fail (GST_IS_DPMAN (dpman));
g_return_if_fail (parent != NULL);
g_return_if_fail (GST_IS_ELEMENT (parent));
g_hash_table_insert (_element_registry, parent, dpman);
gst_object_set_parent (GST_OBJECT (dpman), GST_OBJECT (parent));
g_signal_connect (G_OBJECT (parent), "state_change",
G_CALLBACK (gst_dpman_state_change), dpman);
}
/**
* gst_dpman_get_manager
* @parent: the element that the desired GstDParamManager belongs to
*
* Fetch the GstElement that parameters are handled by this manager.
*
* Returns: the GstDParamManager which belongs to this element or NULL
* if it doesn't exist
*/
GstDParamManager *
gst_dpman_get_manager (GstElement * parent)
{
GstDParamManager *dpman;
g_return_val_if_fail (parent != NULL, NULL);
g_return_val_if_fail (GST_IS_ELEMENT (parent), NULL);
dpman = (GstDParamManager *) g_hash_table_lookup (_element_registry, parent);
return dpman;
}
/**
* gst_dpman_bypass_dparam:
* @dpman: GstDParamManager instance
* @dparam_name: the name of dparam
*
* If a dparam is attached to this dparam_name, it will be detached
* and a warning will be issued. This should be called in the _set_property
* function of an element if the value it changes is also changed by a dparam.
*
*/
void
gst_dpman_bypass_dparam (GstDParamManager * dpman, const gchar * dparam_name)
{
GstDParamWrapper *dpwrap;
g_return_if_fail (dpman != NULL);
g_return_if_fail (GST_IS_DPMAN (dpman));
g_return_if_fail (dparam_name != NULL);
dpwrap = gst_dpman_get_wrapper (dpman, dparam_name);
g_return_if_fail (dpwrap != NULL);
if (dpwrap->dparam != NULL) {
g_warning ("Bypassing attached dparam '%s'. It will be detached",
dparam_name);
gst_dpman_detach_dparam (dpman, dparam_name);
}
}
// internal methods
static GstDParamWrapper *
gst_dpman_get_wrapper (GstDParamManager * dpman, const gchar * dparam_name)
{
g_return_val_if_fail (dpman != NULL, NULL);
g_return_val_if_fail (GST_IS_DPMAN (dpman), NULL);
g_return_val_if_fail (dparam_name != NULL, NULL);
return g_hash_table_lookup (GST_DPMAN_DPARAMS (dpman), dparam_name);
}
static GstDParamWrapper *
gst_dpman_new_wrapper (GstDParamManager * dpman,
GParamSpec * param_spec,
gchar * unit_name, GstDPMUpdateMethod update_method)
{
GstDParamWrapper *dpwrap;
gchar *dparam_name;
g_return_val_if_fail (dpman != NULL, NULL);
g_return_val_if_fail (GST_IS_DPMAN (dpman), NULL);
g_return_val_if_fail (param_spec != NULL, NULL);
g_return_val_if_fail (gst_unitconv_unit_exists (unit_name), NULL);
dparam_name = g_strdup (g_param_spec_get_name (param_spec));
g_return_val_if_fail (gst_dpman_get_wrapper (dpman, dparam_name) == NULL,
NULL);
dpwrap = g_new0 (GstDParamWrapper, 1);
dpwrap->update_method = update_method;
dpwrap->value = g_new0 (GValue, 1);
g_value_init (dpwrap->value, G_PARAM_SPEC_VALUE_TYPE (param_spec));
dpwrap->param_spec = param_spec;
dpwrap->unit_name = unit_name;
g_hash_table_insert (GST_DPMAN_DPARAMS (dpman), dparam_name, dpwrap);
GST_DPMAN_DPARAMS_LIST (dpman) =
g_list_append (GST_DPMAN_DPARAMS_LIST (dpman), dpwrap);
return dpwrap;
}
static void
gst_dpman_state_change (GstElement * element, gint old_state, gint new_state,
GstDParamManager * dpman)
{
GList *dwraps;
GstDParam *dparam;
GstDParamWrapper *dpwrap;
g_return_if_fail (dpman != NULL);
g_return_if_fail (GST_IS_DPMAN (dpman));
if (new_state == GST_STATE_PLAYING) {
GST_DEBUG ("initialising params");
/* force all params to be updated */
dwraps = GST_DPMAN_DPARAMS_LIST (dpman);
while (dwraps) {
dpwrap = (GstDParamWrapper *) dwraps->data;
dparam = dpwrap->dparam;
if (dparam) {
GST_DPARAM_READY_FOR_UPDATE (dparam) = TRUE;
GST_DPARAM_NEXT_UPDATE_TIMESTAMP (dparam) = 0LL;
}
/* some dparams treat the first update after the pipeline starts differently */
dpwrap->update_info = GST_DPARAM_UPDATE_FIRST;
dwraps = g_list_next (dwraps);
}
}
}
static inline void
gst_dpman_inline_direct_update (GValue * value, gpointer data)
{
switch (G_VALUE_TYPE (value)) {
case G_TYPE_INT:
*(gint *) data = g_value_get_int (value);
break;
case G_TYPE_INT64:
*(gint64 *) data = g_value_get_int64 (value);
break;
case G_TYPE_FLOAT:
*(gfloat *) data = g_value_get_float (value);
break;
case G_TYPE_DOUBLE:
*(double *) data = g_value_get_double (value);
break;
default:
break;
}
}
static gboolean
gst_dpman_preprocess_synchronous (GstDParamManager * dpman, guint frames,
gint64 timestamp)
{
GList *dwraps;
GstDParamWrapper *dpwrap;
g_return_val_if_fail (GST_IS_DPMAN (dpman), FALSE);
/* this basically means don't call GST_DPMAN_PREPROCESS at all */
dpman->next_update_frame = frames;
dpman->frames_to_process = frames;
/* now check whether any dparams are ready for an update */
dwraps = GST_DPMAN_DPARAMS_LIST (dpman);
while (dwraps) {
dpwrap = (GstDParamWrapper *) dwraps->data;
if (dpwrap->dparam &&
GST_DPARAM_READY_FOR_UPDATE (dpwrap->dparam) &&
GST_DPARAM_NEXT_UPDATE_TIMESTAMP (dpwrap->dparam) <= timestamp) {
switch (dpwrap->update_method) {
/* direct method - set the value directly in the struct of the element */
case GST_DPMAN_DIRECT:
GST_DPARAM_DO_UPDATE (dpwrap->dparam, timestamp, dpwrap->value,
dpwrap->update_info);
GST_DEBUG ("doing direct update");
gst_dpman_inline_direct_update (dpwrap->value, dpwrap->update_data);
break;
/* callback method - call the element's callback so it can do what it likes */
case GST_DPMAN_CALLBACK:
GST_DPARAM_DO_UPDATE (dpwrap->dparam, timestamp, dpwrap->value,
dpwrap->update_info);
GST_DEBUG ("doing callback update");
GST_DPMAN_CALLBACK_UPDATE (dpwrap, dpwrap->value);
break;
case GST_DPMAN_ARRAY:
/* FIXME do array method checking here */
break;
default:
break;
}
if (dpwrap->update_info == GST_DPARAM_UPDATE_FIRST) {
/* it is not the first update anymore */
dpwrap->update_info = GST_DPARAM_UPDATE_NORMAL;
}
}
dwraps = g_list_next (dwraps);
}
return FALSE;
}
static gint
gst_dpman_dpwrap_compare (const GstDParamWrapper * a,
const GstDParamWrapper * b)
{
if (a->next_update_frame > b->next_update_frame)
return 1;
return (a->next_update_frame < b->next_update_frame) ? -1 : 0;
}
static gboolean
gst_dpman_preprocess_asynchronous (GstDParamManager * dpman, guint frames,
gint64 timestamp)
{
GList *dwraps;
GstDParamWrapper *dpwrap;
gint64 current_time;
gboolean updates_pending;
g_return_val_if_fail (GST_IS_DPMAN (dpman), FALSE);
if (GST_DPMAN_RATE (dpman) == 0) {
g_warning ("The element hasn't given GstDParamManager a frame rate");
return FALSE;
}
dpman->rate_ratio = (guint) (1000000000LL / (gint64) GST_DPMAN_RATE (dpman));
dpman->time_buffer_starts = timestamp;
dpman->time_buffer_ends =
timestamp + ((gint64) frames * (gint64) dpman->rate_ratio);
dpman->num_frames = frames;
updates_pending = FALSE;
/* now check whether any dparams are ready for an update */
dwraps = GST_DPMAN_DPARAMS_LIST (dpman);
while (dwraps) {
dpwrap = (GstDParamWrapper *) dwraps->data;
dpwrap->next_update_frame = frames;
if (dpwrap->dparam && GST_DPARAM_READY_FOR_UPDATE (dpwrap->dparam)) {
current_time = GST_DPARAM_NEXT_UPDATE_TIMESTAMP (dpwrap->dparam);
if (current_time > dpman->time_buffer_ends) {
/* not due for an update in this buffer */
dwraps = g_list_next (dwraps);
continue;
}
if (current_time < timestamp) {
current_time = timestamp;
}
if (current_time == timestamp) {
/* we are overdue for an update. lets do it now */
GST_DPARAM_DO_UPDATE (dpwrap->dparam, current_time, dpwrap->value,
dpwrap->update_info);
if (dpwrap->update_info == GST_DPARAM_UPDATE_FIRST) {
/* it is not the first update anymore */
dpwrap->update_info = GST_DPARAM_UPDATE_NORMAL;
}
switch (dpwrap->update_method) {
/* direct method - set the value directly in the struct of the element */
case GST_DPMAN_DIRECT:
GST_DEBUG ("doing direct update");
gst_dpman_inline_direct_update (dpwrap->value, dpwrap->update_data);
break;
/* callback method - call the element's callback so it can do what it likes */
case GST_DPMAN_CALLBACK:
GST_DEBUG ("doing callback update");
GST_DPMAN_CALLBACK_UPDATE (dpwrap, dpwrap->value);
break;
default:
break;
}
current_time = GST_DPARAM_NEXT_UPDATE_TIMESTAMP (dpwrap->dparam);
if (!GST_DPARAM_READY_FOR_UPDATE (dpwrap->dparam) ||
current_time > dpman->time_buffer_ends) {
/* not due for an update in this buffer */
dwraps = g_list_next (dwraps);
continue;
}
}
dpwrap->next_update_frame =
(guint) (current_time - timestamp) / dpman->rate_ratio;
updates_pending = TRUE;
GST_DEBUG ("timestamp start: %"
G_GINT64_FORMAT " end: %"
G_GINT64_FORMAT " current: %"
G_GINT64_FORMAT, timestamp, dpman->time_buffer_ends, current_time);
}
dwraps = g_list_next (dwraps);
}
if (updates_pending) {
GST_DPMAN_DPARAMS_LIST (dpman) =
g_list_sort (GST_DPMAN_DPARAMS_LIST (dpman),
(GCompareFunc) gst_dpman_dpwrap_compare);
dwraps = GST_DPMAN_DPARAMS_LIST (dpman);
dpwrap = (GstDParamWrapper *) dwraps->data;
dpman->next_update_frame = dpwrap->next_update_frame;
dpman->frames_to_process = dpman->next_update_frame;
GST_DEBUG ("next update frame %u, frames to process %u",
dpman->next_update_frame, dpman->frames_to_process);
return TRUE;
}
dpman->next_update_frame = frames;
dpman->frames_to_process = frames;
return FALSE;
}
static gboolean
gst_dpman_process_asynchronous (GstDParamManager * dpman, guint frame_count)
{
GstDParamWrapper *dpwrap;
GList *dwraps;
gint64 current_time;
gboolean needs_resort = FALSE;
dwraps = GST_DPMAN_DPARAMS_LIST (dpman);
dpwrap = (GstDParamWrapper *) dwraps->data;
GST_DEBUG ("in gst_dpman_process_asynchronous");
if (frame_count >= dpman->num_frames) {
g_warning ("there is no more buffer to process");
dpman->next_update_frame = dpman->num_frames;
dpman->frames_to_process = 0;
return FALSE;
}
if (frame_count != dpwrap->next_update_frame) {
g_warning ("frame count %u does not match update frame %u",
frame_count, dpwrap->next_update_frame);
}
while (dpwrap) {
current_time = GST_DPARAM_NEXT_UPDATE_TIMESTAMP (dpwrap->dparam);
GST_DPARAM_DO_UPDATE (dpwrap->dparam, current_time, dpwrap->value,
dpwrap->update_info);
switch (dpwrap->update_method) {
/* direct method - set the value directly in the struct of the element */
case GST_DPMAN_DIRECT:
GST_DEBUG ("doing direct update");
gst_dpman_inline_direct_update (dpwrap->value, dpwrap->update_data);
break;
/* callback method - call the element's callback so it can do what it likes */
case GST_DPMAN_CALLBACK:
GST_DEBUG ("doing callback update");
GST_DPMAN_CALLBACK_UPDATE (dpwrap, dpwrap->value);
break;
default:
break;
}
dpwrap->next_update_frame = dpman->num_frames;
needs_resort = TRUE;
if (GST_DPARAM_READY_FOR_UPDATE (dpwrap->dparam)) {
current_time = GST_DPARAM_NEXT_UPDATE_TIMESTAMP (dpwrap->dparam);
if (current_time <= dpman->time_buffer_ends) {
dpwrap->next_update_frame =
(guint) (current_time -
dpman->time_buffer_starts) / dpman->rate_ratio;
}
}
if ((dwraps = g_list_next (dwraps))) {
dpwrap = (GstDParamWrapper *) dwraps->data;
if (frame_count == dpwrap->next_update_frame) {
continue;
}
}
dpwrap = NULL;
}
if (needs_resort && g_list_length (GST_DPMAN_DPARAMS_LIST (dpman)) > 1) {
GST_DPMAN_DPARAMS_LIST (dpman) =
g_list_sort (GST_DPMAN_DPARAMS_LIST (dpman),
(GCompareFunc) gst_dpman_dpwrap_compare);
}
dwraps = GST_DPMAN_DPARAMS_LIST (dpman);
dpwrap = (GstDParamWrapper *) dwraps->data;
if (dpwrap->next_update_frame == dpman->num_frames) {
dpman->next_update_frame = dpman->num_frames;
dpman->frames_to_process = dpman->num_frames - frame_count;
GST_DEBUG ("no more updates, frames to process %u",
dpman->frames_to_process);
} else {
dpman->next_update_frame = dpwrap->next_update_frame;
dpman->frames_to_process = dpman->next_update_frame - frame_count;
GST_DEBUG ("next update frame %u, frames to process %u",
dpman->next_update_frame, dpman->frames_to_process);
}
return TRUE;
}
static gboolean
gst_dpman_preprocess_noop (GstDParamManager * dpman, guint frames,
gint64 timestamp)
{
dpman->next_update_frame = frames;
dpman->frames_to_process = frames;
return FALSE;
}
static gboolean
gst_dpman_process_noop (GstDParamManager * dpman, guint frame_count)
{
g_warning
("gst_dpman_process_noop should never be called - something might be wrong with your processing loop");
return FALSE;
}
static void
gst_dpman_setup_synchronous (GstDParamManager * dpman)
{
g_return_if_fail (GST_IS_DPMAN (dpman));
}
static void
gst_dpman_setup_asynchronous (GstDParamManager * dpman)
{
g_return_if_fail (GST_IS_DPMAN (dpman));
}
static void
gst_dpman_setup_disabled (GstDParamManager * dpman)
{
g_return_if_fail (GST_IS_DPMAN (dpman));
}
static void
gst_dpman_teardown_synchronous (GstDParamManager * dpman)
{
g_return_if_fail (GST_IS_DPMAN (dpman));
}
static void
gst_dpman_teardown_asynchronous (GstDParamManager * dpman)
{
g_return_if_fail (GST_IS_DPMAN (dpman));
}
static void
gst_dpman_teardown_disabled (GstDParamManager * dpman)
{
g_return_if_fail (GST_IS_DPMAN (dpman));
}