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gst_init modeled upon gtk_init code cleanups
Original commit message from CVS: gst_init modeled upon gtk_init code cleanups
This commit is contained in:
Thomas Vander Stichele
parent
a48bce0ad6
commit
58855aa95b
3 changed files with 103 additions and 37 deletions
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@ -1,3 +1,10 @@
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2002-11-27 Thomas Vander Stichele <thomas at apestaart dot org>
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* ChangeLog: added an entry
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* gst/gst.*: add gst_init_check which can return TRUE or FALSE
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make gst_init_with_popt_table do the same
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only initialize once, like GTK does
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2002-04-12 Thomas Vander Stichele <thomas@apestaart.org>
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* gst/gst*.[ch]: commited GUAD3C code review comments (marked CR1)
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114
gst/gst.c
114
gst/gst.c
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@ -43,17 +43,21 @@ static GstRegistry *_user_registry;
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static gboolean _gst_registry_fixed = FALSE;
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static gboolean _gst_use_threads = TRUE;
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static gboolean gst_initialized = FALSE;
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/* this will be set in popt callbacks when a problem has been encountered */
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static gboolean _gst_initialization_failure = FALSE;
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extern gint _gst_trace_on;
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extern GThreadFunctions gst_thread_dummy_functions;
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static void load_plugin_func (gpointer data, gpointer user_data);
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static void init_popt_callback (poptContext context, enum poptCallbackReason reason,
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const struct poptOption *option, const char *arg, void *data);
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static void init_pre (void);
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static void init_post (void);
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static void load_plugin_func (gpointer data, gpointer user_data);
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static void init_popt_callback (poptContext context,
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enum poptCallbackReason reason,
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const struct poptOption *option,
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const char *arg, void *data);
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static gboolean init_pre (void);
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static gboolean init_post (void);
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static GSList *preload_plugins = NULL;
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@ -65,8 +69,8 @@ debug_log_handler (const gchar *log_domain,
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const gchar *message,
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gpointer user_data)
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{
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g_log_default_handler(log_domain, log_level, message, user_data);
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g_on_error_query(NULL);
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g_log_default_handler (log_domain, log_level, message, user_data);
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g_on_error_query (NULL);
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}
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enum {
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@ -89,7 +93,7 @@ enum {
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#endif
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/* default scheduler, 'basicomega', can be changed in
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* gstscheduler.c in function gst_scheduler_factory_class_init
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* gstscheduler.c in function gst_scheduler_factory_class_init
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*/
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static const struct poptOption options[] = {
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{NULL, NUL, POPT_ARG_CALLBACK|POPT_CBFLAG_PRE|POPT_CBFLAG_POST, &init_popt_callback, 0, NULL, NULL},
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@ -116,7 +120,8 @@ static const struct poptOption options[] = {
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* actually performed (via a poptGetContext()), the GStreamer libraries will
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* be initialized.
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*
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* Returns: a pointer to the static GStreamer option table. No free is necessary.
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* Returns: a pointer to the static GStreamer option table.
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* No free is necessary.
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*/
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const struct poptOption *
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gst_init_get_popt_table (void)
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@ -124,6 +129,25 @@ gst_init_get_popt_table (void)
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return options;
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}
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/**
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* gst_init_check:
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* @argc: pointer to application's argc
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* @argv: pointer to application's argv
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*
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* Initializes the GStreamer library, setting up internal path lists,
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* registering built-in elements, and loading standard plugins.
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*
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* This function will return %FALSE if GStreamer could not be initialized
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* for some reason. If you want your program to fail fatally,
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* use gst_init() instead.
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*/
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gboolean
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gst_init_check (int *argc, char **argv[])
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{
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return gst_init_with_popt_table (argc, argv, NULL);
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}
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/**
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* gst_init:
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* @argc: pointer to application's argc
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@ -131,24 +155,31 @@ gst_init_get_popt_table (void)
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*
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* Initializes the GStreamer library, setting up internal path lists,
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* registering built-in elements, and loading standard plugins.
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*
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* This function will terminate your program if it was unable to initialize
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* GStreamer for some reason. If you want your program to fall back,
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* use gst_init_check() instead.
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*/
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void
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void
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gst_init (int *argc, char **argv[])
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{
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gst_init_with_popt_table (argc, argv, NULL);
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if (!gst_init_with_popt_table (argc, argv, NULL))
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g_error ("Could not initialize GStreamer !\n");
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}
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/**
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* gst_init_with_popt_table:
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* @argc: pointer to application's argc
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* @argv: pointer to application's argv
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* @popt_options: pointer to a popt table to append
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*
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* Initializes the GStreamer library, parsing the options,
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* Initializes the GStreamer library, parsing the options,
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* setting up internal path lists,
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* registering built-in elements, and loading standard plugins.
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*/
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void
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gst_init_with_popt_table (int *argc, char **argv[], const struct poptOption *popt_options)
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gboolean
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gst_init_with_popt_table (int *argc, char **argv[],
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const struct poptOption *popt_options)
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{
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poptContext context;
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gint nextopt, i, j, nstrip;
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@ -167,13 +198,20 @@ gst_init_with_popt_table (int *argc, char **argv[], const struct poptOption *pop
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POPT_TABLEEND
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};
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if (gst_initialized)
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{
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GST_DEBUG (GST_CAT_GST_INIT, "already initialized gst\n");
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return TRUE;
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}
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if (!argc || !argv) {
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if (argc || argv)
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g_warning ("gst_init: Only one of argc or argv was NULL");
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init_pre();
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init_post();
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return;
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if (!init_pre ()) return FALSE;
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if (!init_post ()) return FALSE;
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gst_initialized = TRUE;
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return TRUE;
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}
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if (popt_options == NULL) {
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@ -181,18 +219,24 @@ gst_init_with_popt_table (int *argc, char **argv[], const struct poptOption *pop
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} else {
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options = options_with;
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}
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context = poptGetContext ("GStreamer", *argc, (const char**)*argv, options, 0);
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while ((nextopt = poptGetNextOpt (context)) > 0); /* do nothing, it's all callbacks */
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context = poptGetContext ("GStreamer", *argc, (const char**)*argv,
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options, 0);
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while ((nextopt = poptGetNextOpt (context)) > 0)
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{
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/* we only check for failures here, actual work is done in callbacks */
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if (_gst_initialization_failure) return FALSE;
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}
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if (nextopt != -1) {
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g_print ("Error on option %s: %s.\nRun '%s --help' to see a full list of available command line options.\n",
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g_print ("Error on option %s: %s.\nRun '%s --help' "
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"to see a full list of available command line options.\n",
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poptBadOption (context, 0),
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poptStrerror (nextopt),
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(*argv)[0]);
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poptFreeContext (context);
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exit (1);
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return FALSE;
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}
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poptFreeContext (context);
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@ -211,6 +255,7 @@ gst_init_with_popt_table (int *argc, char **argv[], const struct poptOption *pop
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nstrip++;
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}
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*argc -= nstrip;
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return TRUE;
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}
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static void
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@ -278,7 +323,8 @@ split_and_iterate (const gchar *stringlist, gchar *separator, GFunc iterator, gp
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}
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}
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static void
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/* we have no fail cases yet, but maybe in the future */
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static gboolean
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init_pre (void)
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{
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const gchar *homedir;
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@ -321,6 +367,8 @@ init_pre (void)
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#endif
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g_free (user_reg);
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return TRUE;
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}
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static gboolean
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@ -359,8 +407,11 @@ static GstPluginDesc plugin_desc = {
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* - initial output
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* - initializes gst_format
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* - registers a bunch of types for gst_objects
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*
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* - we don't have cases yet where this fails, but in the future
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* we might and then it's nice to be able to return that
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*/
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static void
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static gboolean
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init_post (void)
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{
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GLogLevelFlags llf;
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@ -447,6 +498,8 @@ init_post (void)
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if (_gst_progname == NULL) {
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_gst_progname = g_strdup ("gstprog");
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}
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return TRUE;
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}
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static void
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@ -483,9 +536,11 @@ init_popt_callback (poptContext context, enum poptCallbackReason reason,
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gint val = 0;
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GLogLevelFlags fatal_mask;
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if (gst_initialized)
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return;
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switch (reason) {
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case POPT_CALLBACK_REASON_PRE:
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init_pre();
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if (!init_pre ()) _gst_initialization_failure = TRUE;
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break;
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case POPT_CALLBACK_REASON_OPTION:
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switch (option->val) {
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@ -537,7 +592,8 @@ init_popt_callback (poptContext context, enum poptCallbackReason reason,
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}
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break;
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case POPT_CALLBACK_REASON_POST:
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init_post();
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if (!init_post ()) _gst_initialization_failure = TRUE;
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gst_initialized = TRUE;
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break;
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}
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}
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19
gst/gst.h
19
gst/gst.h
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@ -62,16 +62,19 @@
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G_BEGIN_DECLS
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/* initialize GST */
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void gst_init (int *argc, char **argv[]);
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void gst_init_with_popt_table (int *argc, char **argv[],
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const struct poptOption *popt_options);
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const struct poptOption* gst_init_get_popt_table (void);
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void gst_init (int *argc, char **argv[]);
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gboolean gst_init_check (int *argc, char **argv[]);
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gboolean gst_init_with_popt_table (int *argc, char **argv[],
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const struct poptOption
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*popt_options);
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const struct
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poptOption* gst_init_get_popt_table (void);
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void gst_use_threads (gboolean use_threads);
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gboolean gst_has_threads (void);
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void gst_use_threads (gboolean use_threads);
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gboolean gst_has_threads (void);
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void gst_main (void);
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void gst_main_quit (void);
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void gst_main (void);
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void gst_main_quit (void);
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G_END_DECLS
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