gstreamer/tools/gst-launch.c
Wim Taymans 1cda8197e9 Added support for live sources and other elements that cannot do preroll.
Original commit message from CVS:
Added support for live sources and other elements that
cannot do preroll.
Updated design docs, added live-source design doc.
Implemented live source functionality in basesrc
Fix error condition in _bin_get_state()
Implement live source handling in -launch.
Added check for live sources.
Fixed case in GstBin where elements were changed state
multiple times.
2005-06-23 10:37:09 +00:00

620 lines
16 KiB
C

/* GStreamer
* Copyright (C) 1999,2000 Erik Walthinsen <omega@cse.ogi.edu>
* 2000 Wim Taymans <wtay@chello.be>
* 2004 Thomas Vander Stichele <thomas@apestaart.org>
*
* gst-launch.c: tool to launch GStreamer pipelines from the command line
*
* 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.
*/
#ifdef HAVE_CONFIG_H
# include "config.h"
#endif
/* FIXME: hack alert */
#ifdef _MSC_VER
#define DISABLE_FAULT_HANDLER
#endif
#include <string.h>
#include <stdlib.h>
#include <signal.h>
#ifdef HAVE_UNISTD_H
#include <unistd.h>
#endif
#ifndef DISABLE_FAULT_HANDLER
#include <sys/wait.h>
#endif
#include <locale.h> /* for LC_ALL */
#include "gst/gst-i18n-app.h"
#include <gst/gst.h>
/* FIXME: This is just a temporary hack. We should have a better
* check for siginfo handling. */
#ifdef SA_SIGINFO
#define USE_SIGINFO
#endif
extern volatile gboolean glib_on_error_halt;
#ifndef DISABLE_FAULT_HANDLER
static void fault_restore (void);
static void fault_spin (void);
static void sigint_restore (void);
#endif
static gint max_iterations = 0;
static GstElement *pipeline;
gboolean caught_intr = FALSE;
gboolean caught_error = FALSE;
gboolean tags = FALSE;
#ifndef GST_DISABLE_LOADSAVE
static GstElement *
xmllaunch_parse_cmdline (const gchar ** argv)
{
GstElement *pipeline = NULL, *e;
GstXML *xml;
gboolean err;
const gchar *arg;
gchar *element, *property, *value;
GList *l;
gint i = 0;
if (!(arg = argv[0])) {
g_print (_
("Usage: gst-xmllaunch <file.xml> [ element.property=value ... ]\n"));
exit (1);
}
xml = gst_xml_new ();
/* FIXME guchar from gstxml.c */
err = gst_xml_parse_file (xml, (guchar *) arg, NULL);
if (err != TRUE) {
fprintf (stderr, _("ERROR: parse of xml file '%s' failed.\n"), arg);
exit (1);
}
l = gst_xml_get_topelements (xml);
if (!l) {
fprintf (stderr, _("ERROR: no toplevel pipeline element in file '%s'.\n"),
arg);
exit (1);
}
if (l->next)
fprintf (stderr,
_("WARNING: only one toplevel element is supported at this time."));
pipeline = GST_ELEMENT (l->data);
while ((arg = argv[++i])) {
element = g_strdup (arg);
property = strchr (element, '.');
value = strchr (element, '=');
if (!(element < property && property < value)) {
fprintf (stderr,
_("ERROR: could not parse command line argument %d: %s.\n"), i,
element);
g_free (element);
exit (1);
}
*property++ = '\0';
*value++ = '\0';
e = gst_bin_get_by_name (GST_BIN (pipeline), element);
if (!e) {
fprintf (stderr, _("WARNING: element named '%s' not found.\n"), element);
} else {
gst_util_set_object_arg (G_OBJECT (e), property, value);
}
g_free (element);
}
if (!l)
return NULL;
else
return l->data;
}
#endif
#ifndef DISABLE_FAULT_HANDLER
#ifndef USE_SIGINFO
static void
fault_handler_sighandler (int signum)
{
fault_restore ();
/* printf is used instead of g_print(), since it's less likely to
* deadlock */
switch (signum) {
case SIGSEGV:
printf ("Caught SIGSEGV\n");
break;
case SIGQUIT:
printf ("Caught SIGQUIT\n");
break;
default:
printf ("signo: %d\n", signum);
break;
}
fault_spin ();
}
#else /* USE_SIGINFO */
static void
fault_handler_sigaction (int signum, siginfo_t * si, void *misc)
{
fault_restore ();
/* printf is used instead of g_print(), since it's less likely to
* deadlock */
switch (si->si_signo) {
case SIGSEGV:
printf ("Caught SIGSEGV accessing address %p\n", si->si_addr);
break;
case SIGQUIT:
printf ("Caught SIGQUIT\n");
break;
default:
printf ("signo: %d\n", si->si_signo);
printf ("errno: %d\n", si->si_errno);
printf ("code: %d\n", si->si_code);
break;
}
fault_spin ();
}
#endif /* USE_SIGINFO */
static void
fault_spin (void)
{
int spinning = TRUE;
glib_on_error_halt = FALSE;
g_on_error_stack_trace ("gst-launch");
wait (NULL);
/* FIXME how do we know if we were run by libtool? */
printf ("Spinning. Please run 'gdb gst-launch %d' to continue debugging, "
"Ctrl-C to quit, or Ctrl-\\ to dump core.\n", (gint) getpid ());
while (spinning)
g_usleep (1000000);
}
static void
fault_restore (void)
{
struct sigaction action;
memset (&action, 0, sizeof (action));
action.sa_handler = SIG_DFL;
sigaction (SIGSEGV, &action, NULL);
sigaction (SIGQUIT, &action, NULL);
}
static void
fault_setup (void)
{
struct sigaction action;
memset (&action, 0, sizeof (action));
#ifdef USE_SIGINFO
action.sa_sigaction = fault_handler_sigaction;
action.sa_flags = SA_SIGINFO;
#else
action.sa_handler = fault_handler_sighandler;
#endif
sigaction (SIGSEGV, &action, NULL);
sigaction (SIGQUIT, &action, NULL);
}
#endif /* DISABLE_FAULT_HANDLER */
static void
print_tag (const GstTagList * list, const gchar * tag, gpointer unused)
{
gint i, count;
count = gst_tag_list_get_tag_size (list, tag);
for (i = 0; i < count; i++) {
gchar *str;
if (gst_tag_get_type (tag) == G_TYPE_STRING) {
if (!gst_tag_list_get_string_index (list, tag, i, &str))
g_assert_not_reached ();
} else {
str =
g_strdup_value_contents (gst_tag_list_get_value_index (list, tag, i));
}
if (i == 0) {
g_print ("%15s: %s\n", gst_tag_get_nick (tag), str);
} else {
g_print (" : %s\n", str);
}
g_free (str);
}
}
#ifndef DISABLE_FAULT_HANDLER
/* we only use sighandler here because the registers are not important */
static void
sigint_handler_sighandler (int signum)
{
g_print ("Caught interrupt -- ");
sigint_restore ();
caught_intr = TRUE;
}
static gboolean
check_intr (GstElement * pipeline)
{
if (!caught_intr) {
return TRUE;
} else {
caught_intr = FALSE;
g_print ("Pausing pipeline.\n");
gst_element_set_state (pipeline, GST_STATE_PAUSED);
return FALSE;
}
}
static void
sigint_setup (void)
{
struct sigaction action;
memset (&action, 0, sizeof (action));
action.sa_handler = sigint_handler_sighandler;
sigaction (SIGINT, &action, NULL);
}
static void
sigint_restore (void)
{
struct sigaction action;
memset (&action, 0, sizeof (action));
action.sa_handler = SIG_DFL;
sigaction (SIGINT, &action, NULL);
}
static void
play_handler (int signum)
{
switch (signum) {
case SIGUSR1:
g_print ("Caught SIGUSR1 - Play request.\n");
gst_element_set_state (pipeline, GST_STATE_PLAYING);
break;
case SIGUSR2:
g_print ("Caught SIGUSR2 - Stop request.\n");
gst_element_set_state (pipeline, GST_STATE_NULL);
break;
}
}
static void
play_signal_setup (void)
{
struct sigaction action;
memset (&action, 0, sizeof (action));
action.sa_handler = play_handler;
sigaction (SIGUSR1, &action, NULL);
sigaction (SIGUSR2, &action, NULL);
}
#endif /* DISABLE_FAULT_HANDLER */
static gboolean
event_loop (GstElement * pipeline, gboolean blocking)
{
GstBus *bus;
GstMessageType revent;
GstMessage *message = NULL;
bus = gst_element_get_bus (GST_ELEMENT (pipeline));
g_timeout_add (50, (GSourceFunc) check_intr, pipeline);
while (TRUE) {
revent = gst_bus_poll (bus, GST_MESSAGE_ANY, blocking ? -1 : 0);
/* if the poll timed out, only when !blocking */
if (revent == GST_MESSAGE_UNKNOWN)
return FALSE;
message = gst_bus_pop (bus);
g_return_val_if_fail (message != NULL, TRUE);
switch (revent) {
case GST_MESSAGE_EOS:
gst_message_unref (message);
return FALSE;
case GST_MESSAGE_TAG:
if (tags) {
GstTagList *tags;
gst_message_parse_tag (message, &tags);
g_print (_("FOUND TAG : found by element \"%s\".\n"),
GST_STR_NULL (GST_ELEMENT_NAME (GST_MESSAGE_SRC (message))));
gst_tag_list_foreach (tags, print_tag, NULL);
gst_tag_list_free (tags);
}
gst_message_unref (message);
break;
case GST_MESSAGE_WARNING:
case GST_MESSAGE_ERROR:{
GError *gerror;
gchar *debug;
gst_message_parse_error (message, &gerror, &debug);
gst_object_default_error (GST_MESSAGE_SRC (message), gerror, debug);
gst_message_unref (message);
g_error_free (gerror);
g_free (debug);
return TRUE;
}
case GST_MESSAGE_STATE_CHANGED:{
GstElementState old, new;
gst_message_parse_state_changed (message, &old, &new);
if (!(old == GST_STATE_PLAYING && new == GST_STATE_PAUSED)) {
gst_message_unref (message);
break;
}
g_print (_
("Element \"%s\" has gone from PLAYING to PAUSED, quitting.\n"),
GST_STR_NULL (GST_ELEMENT_NAME (GST_MESSAGE_SRC (message))));
/* cut out of the event loop if check_intr set us to PAUSED */
gst_message_unref (message);
return FALSE;
}
default:
/* just be quiet by default */
gst_message_unref (message);
break;
}
}
g_assert_not_reached ();
return TRUE;
}
int
main (int argc, char *argv[])
{
gint i, j;
/* options */
gboolean verbose = FALSE;
gboolean no_fault = FALSE;
gboolean trace = FALSE;
gchar *savefile = NULL;
gchar *exclude_args = NULL;
struct poptOption options[] = {
{"tags", 't', POPT_ARG_NONE | POPT_ARGFLAG_STRIP, &tags, 0,
N_("Output tags (also known as metadata)"), NULL},
{"verbose", 'v', POPT_ARG_NONE | POPT_ARGFLAG_STRIP, &verbose, 0,
N_("Output status information and property notifications"), NULL},
{"exclude", 'X', POPT_ARG_STRING | POPT_ARGFLAG_STRIP, &exclude_args, 0,
N_("Do not output status information of TYPE"), N_("TYPE1,TYPE2,...")},
#ifndef GST_DISABLE_LOADSAVE
{"output", 'o', POPT_ARG_STRING | POPT_ARGFLAG_STRIP, &savefile, 0,
N_("Save xml representation of pipeline to FILE and exit"), N_("FILE")},
#endif
{"no-fault", 'f', POPT_ARG_NONE | POPT_ARGFLAG_STRIP, &no_fault, 0,
N_("Do not install a fault handler"), NULL},
{"trace", 'T', POPT_ARG_NONE | POPT_ARGFLAG_STRIP, &trace, 0,
N_("Print alloc trace (if enabled at compile time)"), NULL},
{"iterations", 'i', POPT_ARG_INT | POPT_ARGFLAG_STRIP, &max_iterations, 0,
N_("Number of times to iterate pipeline"), NULL},
POPT_TABLEEND
};
gchar **argvn;
GError *error = NULL;
gint res = 0;
free (malloc (8)); /* -lefence */
#ifdef GETTEXT_PACKAGE
bindtextdomain (GETTEXT_PACKAGE, LOCALEDIR);
bind_textdomain_codeset (GETTEXT_PACKAGE, "UTF-8");
textdomain (GETTEXT_PACKAGE);
#endif
gst_alloc_trace_set_flags_all (GST_ALLOC_TRACE_LIVE);
gst_init_with_popt_table (&argc, &argv, options);
/* FIXpopt: strip short args, too. We do it ourselves for now */
j = 1;
for (i = 1; i < argc; i++) {
if (*(argv[i]) == '-') {
if (strlen (argv[i]) == 2) {
gchar *c = argv[i];
c++;
if (*c == 'X' || *c == 'o') {
i++;
}
}
} else {
argv[j] = argv[i];
j++;
}
}
argc = j;
#ifndef DISABLE_FAULT_HANDLER
if (!no_fault)
fault_setup ();
sigint_setup ();
play_signal_setup ();
#endif
if (trace) {
if (!gst_alloc_trace_available ()) {
g_warning ("Trace not available (recompile with trace enabled).");
}
gst_alloc_trace_print_all ();
}
/* make a null-terminated version of argv */
argvn = g_new0 (char *, argc);
memcpy (argvn, argv + 1, sizeof (char *) * (argc - 1));
#ifndef GST_DISABLE_LOADSAVE
if (strstr (argv[0], "gst-xmllaunch")) {
pipeline = xmllaunch_parse_cmdline ((const gchar **) argvn);
} else
#endif
{
pipeline =
(GstElement *) gst_parse_launchv ((const gchar **) argvn, &error);
}
g_free (argvn);
if (!pipeline) {
if (error) {
fprintf (stderr, _("ERROR: pipeline could not be constructed: %s.\n"),
error->message);
g_error_free (error);
} else {
fprintf (stderr, _("ERROR: pipeline could not be constructed.\n"));
}
return 1;
} else if (error) {
fprintf (stderr, _("WARNING: erroneous pipeline: %s\n"), error->message);
fprintf (stderr, _(" Trying to run anyway.\n"));
g_error_free (error);
}
if (verbose) {
gchar **exclude_list =
exclude_args ? g_strsplit (exclude_args, ",", 0) : NULL;
g_signal_connect (pipeline, "deep_notify",
G_CALLBACK (gst_object_default_deep_notify), exclude_list);
}
#ifndef GST_DISABLE_LOADSAVE
if (savefile) {
gst_xml_write_file (GST_ELEMENT (pipeline), fopen (savefile, "w"));
}
#endif
if (!savefile) {
GstElementState state, pending;
GstElementStateReturn ret;
if (!GST_IS_BIN (pipeline)) {
GstElement *real_pipeline = gst_element_factory_make ("pipeline", NULL);
if (real_pipeline == NULL) {
fprintf (stderr, _("ERROR: the 'pipeline' element wasn't found.\n"));
return 1;
}
gst_bin_add (GST_BIN (real_pipeline), pipeline);
pipeline = real_pipeline;
}
fprintf (stderr, _("PAUSE pipeline ...\n"));
ret = gst_element_set_state (pipeline, GST_STATE_PAUSED);
switch (ret) {
case GST_STATE_FAILURE:
fprintf (stderr, _("ERROR: pipeline doesn't want to pause.\n"));
res = -1;
goto end;
case GST_STATE_NO_PREROLL:
fprintf (stderr, _("NO_PREROLL pipeline ...\n"));
break;
case GST_STATE_ASYNC:
fprintf (stderr, _("PREROLL pipeline ...\n"));
gst_element_get_state (pipeline, &state, &pending, NULL);
/* fallthrough */
case GST_STATE_SUCCESS:
fprintf (stderr, _("PREROLLED pipeline ...\n"));
break;
}
caught_error = event_loop (pipeline, FALSE);
/* see if we got any messages */
while (g_main_context_iteration (NULL, FALSE));
if (caught_error) {
fprintf (stderr, _("ERROR: pipeline doesn't want to preroll.\n"));
} else {
GTimeVal tfthen, tfnow;
GstClockTimeDiff diff;
fprintf (stderr, _("RUNNING pipeline ...\n"));
if (gst_element_set_state (pipeline,
GST_STATE_PLAYING) == GST_STATE_FAILURE) {
fprintf (stderr, _("ERROR: pipeline doesn't want to play.\n"));
res = -1;
goto end;
}
g_get_current_time (&tfthen);
caught_error = event_loop (pipeline, TRUE);
g_get_current_time (&tfnow);
diff = GST_TIMEVAL_TO_TIME (tfnow) - GST_TIMEVAL_TO_TIME (tfthen);
g_print (_("Execution ended after %" G_GUINT64_FORMAT " ns.\n"), diff);
}
fprintf (stderr, _("PAUSE pipeline ...\n"));
gst_element_set_state (pipeline, GST_STATE_PAUSED);
gst_element_get_state (pipeline, &state, &pending, NULL);
fprintf (stderr, _("READY pipeline ...\n"));
gst_element_set_state (pipeline, GST_STATE_READY);
gst_element_get_state (pipeline, &state, &pending, NULL);
fprintf (stderr, _("NULL pipeline ...\n"));
gst_element_set_state (pipeline, GST_STATE_NULL);
gst_element_get_state (pipeline, &state, &pending, NULL);
}
end:
fprintf (stderr, _("FREEING pipeline ...\n"));
gst_object_unref (GST_OBJECT (pipeline));
if (trace)
gst_alloc_trace_print_all ();
return res;
}