gstreamer/gst/gst.c
Wim Taymans a4e4bb5795 Small cleanups
Original commit message from CVS:
Small cleanups
Added a bound to the number of switches, also fix a small bug
2002-01-01 13:51:04 +00:00

403 lines
10 KiB
C

/* GStreamer
* Copyright (C) 1999,2000 Erik Walthinsen <omega@cse.ogi.edu>
* 2000 Wim Taymans <wtay@chello.be>
*
* gst.c: Initialization and non-pipeline operations
*
* 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 <stdlib.h>
#include "gst_private.h"
#include "gst.h"
#include "gstqueue.h"
#ifndef GST_DISABLE_TYPEFIND
#include "gsttypefind.h"
#endif
#define MAX_PATH_SPLIT 16
#define GST_PLUGIN_SEPARATOR ","
gchar *_gst_progname;
extern gint _gst_trace_on;
extern gboolean _gst_plugin_spew;
static gboolean gst_init_check (int *argc, gchar ***argv);
static void load_plugin_func (gpointer data, gpointer user_data);
static GSList *preload_plugins = NULL;
const gchar *g_log_domain_gstreamer = "GStreamer";
static void
debug_log_handler (const gchar *log_domain,
GLogLevelFlags log_level,
const gchar *message,
gpointer user_data)
{
g_log_default_handler(log_domain, log_level, message, user_data);
g_on_error_query(NULL);
}
/**
* gst_init:
* @argc: pointer to application's argc
* @argv: pointer to application's argv
*
* Initializes the GStreamer library, setting up internal path lists,
* registering built-in elements, and loading standard plugins.
*/
void
gst_init (int *argc, char **argv[])
{
GLogLevelFlags llf;
#ifndef GST_DISABLE_TRACE
GstTrace *gst_trace;
#endif
if (!g_thread_supported ())
g_thread_init (NULL);
#ifdef USE_GLIB2
g_type_init();
#else
{
gchar *display;
/* Only initialise gtk fully if we have an X display.
* FIXME: this fails if the display is specified differently, eg, by
* a command line parameter. This is okay though, since this is only
* a quick hack and should be replaced when we move to gobject.*/
display = g_getenv("DISPLAY");
if (display == NULL) {
gtk_type_init ();
} else {
gtk_init (argc,argv);
}
}
#endif
if (!gst_init_check (argc,argv)) {
exit (0); /* FIXME! */
}
llf = G_LOG_LEVEL_CRITICAL | G_LOG_LEVEL_ERROR | G_LOG_FLAG_FATAL;
g_log_set_handler(g_log_domain_gstreamer, llf, debug_log_handler, NULL);
GST_INFO (GST_CAT_GST_INIT, "Initializing GStreamer Core Library");
gst_object_get_type ();
gst_pad_get_type ();
gst_real_pad_get_type ();
gst_ghost_pad_get_type ();
gst_elementfactory_get_type ();
gst_element_get_type ();
gst_typefactory_get_type ();
gst_schedulerfactory_get_type ();
gst_bin_get_type ();
#ifndef GST_DISABLE_AUTOPLUG
gst_autoplugfactory_get_type ();
#endif
_gst_cpu_initialize ();
_gst_props_initialize ();
_gst_caps_initialize ();
_gst_plugin_initialize ();
_gst_event_initialize ();
_gst_buffer_initialize ();
_gst_buffer_pool_initialize ();
/* if we need to preload plugins */
if (preload_plugins) {
g_slist_foreach (preload_plugins, load_plugin_func, NULL);
g_slist_free (preload_plugins);
preload_plugins = NULL;
}
/* register some standard builtin types */
gst_elementfactory_new ("bin", gst_bin_get_type (), &gst_bin_details);
gst_elementfactory_new ("pipeline", gst_pipeline_get_type (), &gst_pipeline_details);
gst_elementfactory_new ("thread", gst_thread_get_type (), &gst_thread_details);
gst_elementfactory_new ("queue", gst_queue_get_type (), &gst_queue_details);
#ifndef GST_DISABLE_TYPEFIND
gst_elementfactory_new ("typefind", gst_typefind_get_type (), &gst_typefind_details);
#endif
#ifndef GST_DISABLE_TRACE
_gst_trace_on = 0;
if (_gst_trace_on) {
gst_trace = gst_trace_new ("gst.trace",1024);
gst_trace_set_default (gst_trace);
}
#endif /* GST_DISABLE_TRACE */
}
static void
split_and_iterate (const gchar *stringlist, gchar *separator, GFunc iterator)
{
gchar **strings;
gint j = 0;
gchar *lastlist = g_strdup (stringlist);
while (lastlist) {
strings = g_strsplit (lastlist, separator, MAX_PATH_SPLIT);
g_free (lastlist);
lastlist = NULL;
while (strings[j]) {
iterator (strings[j], NULL);
if (++j == MAX_PATH_SPLIT) {
lastlist = g_strdup (strings[j]);
g_strfreev (strings);
j=0;
break;
}
}
}
}
static void
add_path_func (gpointer data, gpointer user_data)
{
GST_INFO (GST_CAT_GST_INIT, "Adding plugin path: \"%s\"", (gchar *)data);
gst_plugin_add_path ((gchar *)data);
}
static void
prepare_for_load_plugin_func (gpointer data, gpointer user_data)
{
preload_plugins = g_slist_prepend (preload_plugins, data);
}
static void
load_plugin_func (gpointer data, gpointer user_data)
{
gboolean ret;
ret = gst_plugin_load ((gchar *)data);
if (ret)
GST_INFO (GST_CAT_GST_INIT, "Loaded plugin: \"%s\"", (gchar *)data);
else
GST_INFO (GST_CAT_GST_INIT, "Failed to load plugin: \"%s\"", (gchar *)data);
g_free (data);
}
static void
parse_number (gchar *number, guint32 *val)
{
/* handle either 0xHEX or dec */
if (*(number+1) == 'x') {
sscanf (number+2, "%08x", val);
} else {
sscanf (number, "%d", val);
}
}
/* returns FALSE if the program can be aborted */
static gboolean
gst_init_check (int *argc,
gchar ***argv)
{
gboolean ret = TRUE;
gboolean showhelp = FALSE;
_gst_progname = NULL;
if (argc && argv) {
gint i, j, k;
_gst_progname = g_strdup(*argv[0]);
for (i=1; i< *argc; i++) {
if (!strncmp ("--gst-info-mask=", (*argv)[i], 16)) {
guint32 val;
parse_number ((*argv)[i]+16, &val);
gst_info_set_categories (val);
(*argv)[i] = NULL;
}
else if (!strncmp ("--gst-debug-mask=", (*argv)[i], 17)) {
guint32 val;
parse_number ((*argv)[i]+17, &val);
gst_debug_set_categories (val);
(*argv)[i] = NULL;
}
else if (!strncmp ("--gst-mask=", (*argv)[i], 11)) {
guint32 val;
parse_number ((*argv)[i]+11, &val);
gst_debug_set_categories (val);
gst_info_set_categories (val);
(*argv)[i] = NULL;
}
else if (!strncmp ("--gst-plugin-spew", (*argv)[i], 17)) {
_gst_plugin_spew = TRUE;
(*argv)[i] = NULL;
}
else if (!strncmp ("--gst-plugin-path=", (*argv)[i], 17)) {
split_and_iterate ((*argv)[i]+18, G_SEARCHPATH_SEPARATOR_S, add_path_func);
(*argv)[i] = NULL;
}
else if (!strncmp ("--gst-plugin-load=", (*argv)[i], 17)) {
split_and_iterate ((*argv)[i]+18, ",", prepare_for_load_plugin_func);
(*argv)[i] = NULL;
}
else if (!strncmp ("--help", (*argv)[i], 6)) {
showhelp = TRUE;
(*argv)[i] = NULL;
}
}
for (i = 1; i < *argc; i++) {
for (k = i; k < *argc; k++)
if ((*argv)[k] != NULL)
break;
if (k > i) {
k -= i;
for (j = i + k; j < *argc; j++)
(*argv)[j-k] = (*argv)[j];
*argc -= k;
}
}
}
if (_gst_progname == NULL) {
_gst_progname = g_strdup("gstprog");
}
/* check for ENV variables */
{
const gchar *plugin_path = g_getenv("GST_PLUGIN_PATH");
split_and_iterate (plugin_path, G_SEARCHPATH_SEPARATOR_S, add_path_func);
}
if (showhelp) {
guint i;
g_print ("usage %s [OPTION...]\n", _gst_progname);
g_print ("\nGStreamer options\n");
g_print (" --gst-info-mask=FLAGS GST info flags to set (current %08x)\n", gst_info_get_categories());
g_print (" --gst-debug-mask=FLAGS GST debugging flags to set\n");
g_print (" --gst-mask=FLAGS GST info *and* debug flags to set\n");
g_print (" --gst-plugin-spew Enable printout of errors while loading GST plugins\n");
g_print (" --gst-plugin-path=PATH Add directories separated with '%s' to the plugin search path\n",
G_SEARCHPATH_SEPARATOR_S);
g_print (" --gst-plugin-load=PLUGINS Load plugins separated with '%s'\n",
GST_PLUGIN_SEPARATOR);
g_print ("\n Mask (to be OR'ed) info/debug FLAGS \n");
g_print ("--------------------------------------------------------\n");
for (i = 0; i<GST_CAT_MAX_CATEGORY; i++) {
if (gst_get_category_name(i)) {
#if GST_DEBUG_COLOR
g_print (" 0x%08x %s%s \033[%sm%s\033[00m\n", 1<<i,
(gst_info_get_categories() & (1<<i)?"(enabled)":" "),
(gst_debug_get_categories() & (1<<i)?"/(enabled)":"/ "),
_gst_category_colors[i], gst_get_category_name (i));
#else
g_print (" 0x%08x %s%s %s\n", 1<<i,
(gst_info_get_categories() & (1<<i)?"(enabled)":" "),
(gst_debug_get_categories() & (1<<i)?"/(enabled)":"/ "),
gst_get_category_name (i));
#endif
}
}
}
return ret;
}
#ifdef USE_GLIB2
static GSList *mainloops = NULL;
#endif
/**
* gst_main:
*
* Enter the main GStreamer processing loop
*/
void
gst_main (void)
{
#ifdef USE_GLIB2
GMainLoop *loop;
loop = g_main_loop_new (NULL, FALSE);
mainloops = g_slist_prepend (mainloops, loop);
g_main_loop_run (loop);
#else
gtk_main ();
#endif
}
/**
* gst_main_quit:
*
* Exits the main GStreamer processing loop
*/
void
gst_main_quit (void)
{
#ifdef USE_GLIB2
if (!mainloops)
g_warning ("Quit more loops than there are");
else {
GMainLoop *loop = mainloops->data;
mainloops = g_slist_delete_link (mainloops, mainloops);
g_main_loop_quit (loop);
}
#else
gtk_main_quit ();
#endif
}
/**
* gst_version:
* @major: pointer to a guint to store the major version number
* @minor: pointer to a guint to store the minor version number
* @micro: pointer to a guint to store the micro version number
*
* Gets the version number of the GStreamer library
*/
void
gst_version (guint *major, guint *minor, guint *micro)
{
g_return_if_fail (major);
g_return_if_fail (minor);
g_return_if_fail (micro);
*major = GST_VERSION_MAJOR;
*minor = GST_VERSION_MINOR;
*micro = GST_VERSION_MICRO;
}