gstreamer/gst/gst.c
Andy Wingo 4ef87d3c5d allow gst_init(NULL, NULL) to work this fix was prompted by testsuite/test_gst_init.c, which thomasvs was running on ...
Original commit message from CVS:
allow gst_init(NULL, NULL) to work
this fix was prompted by testsuite/test_gst_init.c, which thomasvs was running
on the autobuilder. they are good after all :)
2002-02-16 18:27:04 +00:00

443 lines
13 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 <stdio.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 void load_plugin_func (gpointer data, gpointer user_data);
static void init_popt_callback (poptContext context, enum poptCallbackReason reason,
const struct poptOption *option, const char *arg, void *data);
static void init_pre (void);
static void init_post (void);
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);
}
enum {
ARG_INFO_MASK=1,
ARG_DEBUG_MASK,
ARG_MASK,
ARG_PLUGIN_SPEW,
ARG_PLUGIN_PATH,
ARG_PLUGIN_LOAD,
ARG_SCHEDULER
};
#ifndef NUL
#define NUL '\0'
#endif
/* FIXME: put in the extended mask help */
static const struct poptOption options[] = {
{NULL, NUL, POPT_ARG_CALLBACK|POPT_CBFLAG_PRE|POPT_CBFLAG_POST, &init_popt_callback, 0, NULL, NULL},
{NULL, NUL, POPT_ARG_INCLUDE_TABLE, poptHelpOptions, 0, "Help options:", NULL},
{"gst-info-mask", NUL, POPT_ARG_INT|POPT_ARGFLAG_STRIP, NULL, ARG_INFO_MASK, "info bitmask", "MASK"},
{"gst-debug-mask", NUL, POPT_ARG_INT|POPT_ARGFLAG_STRIP, NULL, ARG_DEBUG_MASK, "debugging bitmask", "MASK"},
{"gst-mask", NUL, POPT_ARG_INT|POPT_ARGFLAG_STRIP, NULL, ARG_MASK, "bitmask for both info and debugging", "MASK"},
{"gst-plugin-spew", NUL, POPT_ARG_NONE|POPT_ARGFLAG_STRIP, NULL, ARG_PLUGIN_SPEW, "enable verbose plugin loading diagnostics", NULL},
{"gst-plugin-path", NUL, POPT_ARG_STRING|POPT_ARGFLAG_STRIP, NULL, ARG_PLUGIN_PATH, "'" G_SEARCHPATH_SEPARATOR_S "'--separated path list for loading plugins", "PATHS"},
{"gst-plugin-load", NUL, POPT_ARG_STRING|POPT_ARGFLAG_STRIP, NULL, ARG_PLUGIN_LOAD, "comma-separated list of plugins to preload", "PLUGINS"},
{"gst-scheduler", NUL, POPT_ARG_STRING|POPT_ARGFLAG_STRIP, NULL, ARG_SCHEDULER, "scheduler to use ('basic' is the default)", "SCHEDULER"},
POPT_TABLEEND
};
/**
* gst_init_get_popt_table:
*
* Returns a popt option table with GStreamer's argument specifications. The
* table is set up to use popt's callback method, so whenever the parsing is
* actually performed (via a poptGetContext()), the GStreamer libraries will
* be initialized.
*
* Returns: a pointer to the static GStreamer option table. No free is necessary.
*/
const struct poptOption *
gst_init_get_popt_table (void)
{
return options;
}
/**
* 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[])
{
poptContext context;
gint nextopt, i, j, nstrip;
const struct poptOption *options;
gchar **temp;
if (!argc || !argv) {
if (argc || argv)
g_warning ("gst_init: Only one of arg or argv was NULL");
init_pre();
init_post();
return;
}
options = gst_init_get_popt_table ();
context = poptGetContext ("GStreamer", *argc, (const char**)*argv, options, 0);
while ((nextopt = poptGetNextOpt (context)) > 0); /* do nothing, it's all callbacks */
if (nextopt != -1) {
g_print ("Error on option %s: %s.\nRun '%s --help' to see a full list of available command line options.\n",
poptBadOption (context, 0),
poptStrerror (nextopt),
(*argv)[0]);
exit (1);
}
/* let's do this once there are 1.6.3 popt debs out
*argc = poptStrippedArgv (context, *argc, *argv); */
/* until then we'll do a very basic arg permutation
this will break gst-launch -o */
temp = *argv + 1;
i = 1;
nstrip = 0;
g_assert (*argc > 0);
while (i++ < *argc && *temp[0]=='-') {
for (j = 1; j < *argc - 1; j++)
(*argv)[j] = (*argv)[j+1];
(*argv)[*argc-1] = *temp;
nstrip++;
}
*argc -= nstrip;
}
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 (const gchar *number, guint32 *val)
{
/* handle either 0xHEX or dec */
if (*(number+1) == 'x') {
sscanf (number+2, "%08x", val);
} else {
sscanf (number, "%d", val);
}
}
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
init_pre (void)
{
if (!g_thread_supported ())
g_thread_init (NULL);
g_type_init();
}
static void
init_post (void)
{
GLogLevelFlags llf;
gboolean showhelp = FALSE;
#ifndef GST_DISABLE_TRACE
GstTrace *gst_trace;
#endif
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 */
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);
}
/* FIXME: this is never true... */
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 (" --gst-scheduler=NAME Use a nonstandard scheduler\n");
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
}
}
}
}
static void
init_popt_callback (poptContext context, enum poptCallbackReason reason,
const struct poptOption *option, const char *arg, void *data)
{
gint val = 0;
switch (reason) {
case POPT_CALLBACK_REASON_PRE:
init_pre();
break;
case POPT_CALLBACK_REASON_OPTION:
switch (option->val) {
case ARG_INFO_MASK:
parse_number (arg, &val);
gst_info_set_categories (val);
break;
case ARG_DEBUG_MASK:
parse_number (arg, &val);
gst_debug_set_categories (val);
break;
case ARG_MASK:
parse_number (arg, &val);
gst_debug_set_categories (val);
gst_info_set_categories (val);
break;
case ARG_PLUGIN_SPEW:
_gst_plugin_spew = TRUE;
break;
case ARG_PLUGIN_PATH:
split_and_iterate (arg, G_SEARCHPATH_SEPARATOR_S, add_path_func);
break;
case ARG_PLUGIN_LOAD:
split_and_iterate (arg, ",", prepare_for_load_plugin_func);
break;
case ARG_SCHEDULER:
gst_schedulerfactory_set_default_name (arg);
break;
default:
g_warning ("option %d not recognized", option->val);
break;
}
break;
case POPT_CALLBACK_REASON_POST:
init_post();
break;
}
}
static GSList *mainloops = NULL;
/**
* gst_main:
*
* Enter the main GStreamer processing loop
*/
void
gst_main (void)
{
GMainLoop *loop;
loop = g_main_loop_new (NULL, FALSE);
mainloops = g_slist_prepend (mainloops, loop);
g_main_loop_run (loop);
}
/**
* gst_main_quit:
*
* Exits the main GStreamer processing loop
*/
void
gst_main_quit (void)
{
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);
}
}
/**
* 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;
}