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gstreamer/tools/gst-launch.c
Mathieu Duponchelle c682579c5e gst-launch: go back down to GST_STATE_NULL in one step. 
Going through each state on the way back down to GST_STATE_NULL
can cause deadlocks, for example:

gst-launch-1.0 audiotestsrc ! valve drop=true ! autoaudiosink

ctrl + C

Hangs forever when going to PAUSED, because the "final" state is
ASYNC, and the sink blocks waiting for a preroll buffer.

Going straight to NULL addresses this issue, and also helps
making teardown faster when piping sparse streams to a
sync sink.
2020-04-01 15:41:49 +02:00

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/* 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., 51 Franklin St, Fifth Floor,
* Boston, MA 02110-1301, USA.
*/
#ifdef HAVE_CONFIG_H
# include "config.h"
#endif
#include <glib.h>
#include <stdio.h>
#include <string.h>
#include <signal.h>
#ifdef HAVE_UNISTD_H
#include <unistd.h>
#endif
#ifdef G_OS_UNIX
#include <glib-unix.h>
#include <sys/wait.h>
#elif defined (G_OS_WIN32)
#define WIN32_LEAN_AND_MEAN
#include <windows.h>
#include <io.h>
#ifndef STDOUT_FILENO
#define STDOUT_FILENO 1
#endif
#define isatty _isatty
#endif
#include <locale.h> /* for LC_ALL */
#include "tools.h"
extern volatile gboolean glib_on_error_halt;
#ifdef G_OS_UNIX
static void fault_restore (void);
static void fault_spin (void);
#endif
/* exit codes */
typedef enum _LaunchExitCode
{
LEC_STATE_CHANGE_FAILURE = -1,
LEC_NO_ERROR = 0,
LEC_ERROR,
LEC_INTERRUPT
} LaunchExitCode;
static GMainLoop *loop = NULL;
static GstElement *pipeline = NULL;
/* options */
static gboolean quiet = FALSE;
static gboolean tags = FALSE;
static gboolean toc = FALSE;
static gboolean messages = FALSE;
static gboolean eos_on_shutdown = FALSE;
static gchar **exclude_args = NULL;
/* pipeline status */
static gboolean is_live = FALSE;
static gboolean buffering = FALSE;
static LaunchExitCode last_launch_code = LEC_NO_ERROR;
static GstState target_state = GST_STATE_PAUSED;
static gboolean prerolled = FALSE;
static gboolean in_progress = FALSE;
static GstClockTime tfthen = GST_CLOCK_TIME_NONE;
static gboolean interrupting = FALSE;
static gboolean waiting_eos = FALSE;
/* convenience macro so we don't have to litter the code with if(!quiet) */
#define PRINT if(!quiet)gst_print
#ifdef G_OS_UNIX
static void
fault_handler_sighandler (int signum)
{
fault_restore ();
/* printf is used instead of gst_print(), since it's less likely to
* deadlock */
switch (signum) {
case SIGSEGV:
fprintf (stderr, "Caught SIGSEGV\n");
break;
case SIGQUIT:
if (!quiet)
printf ("Caught SIGQUIT\n");
break;
default:
fprintf (stderr, "signo: %d\n", signum);
break;
}
fault_spin ();
}
static void
fault_spin (void)
{
int spinning = TRUE;
glib_on_error_halt = FALSE;
g_on_error_stack_trace ("gst-launch-" GST_API_VERSION);
wait (NULL);
/* FIXME how do we know if we were run by libtool? */
fprintf (stderr,
"Spinning. Please run 'gdb gst-launch-" GST_API_VERSION " %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));
action.sa_handler = fault_handler_sighandler;
sigaction (SIGSEGV, &action, NULL);
sigaction (SIGQUIT, &action, NULL);
}
#endif /* G_OS_UNIX */
#if 0
typedef struct _GstIndexStats
{
gint id;
gchar *desc;
guint num_frames;
guint num_keyframes;
guint num_dltframes;
GstClockTime last_keyframe;
GstClockTime last_dltframe;
GstClockTime min_keyframe_gap;
GstClockTime max_keyframe_gap;
GstClockTime avg_keyframe_gap;
} GstIndexStats;
static void
entry_added (GstIndex * index, GstIndexEntry * entry, gpointer user_data)
{
GPtrArray *index_stats = (GPtrArray *) user_data;
GstIndexStats *s;
switch (entry->type) {
case GST_INDEX_ENTRY_ID:
/* we have a new writer */
GST_DEBUG_OBJECT (index, "id %d: describes writer %s", entry->id,
GST_INDEX_ID_DESCRIPTION (entry));
if (entry->id >= index_stats->len) {
g_ptr_array_set_size (index_stats, entry->id + 1);
}
s = g_new (GstIndexStats, 1);
s->id = entry->id;
s->desc = g_strdup (GST_INDEX_ID_DESCRIPTION (entry));
s->num_frames = s->num_keyframes = s->num_dltframes = 0;
s->last_keyframe = s->last_dltframe = GST_CLOCK_TIME_NONE;
s->min_keyframe_gap = s->max_keyframe_gap = s->avg_keyframe_gap =
GST_CLOCK_TIME_NONE;
g_ptr_array_index (index_stats, entry->id) = s;
break;
case GST_INDEX_ENTRY_FORMAT:
/* have not found any code calling this */
GST_DEBUG_OBJECT (index, "id %d: registered format %d for %s\n",
entry->id, GST_INDEX_FORMAT_FORMAT (entry),
GST_INDEX_FORMAT_KEY (entry));
break;
case GST_INDEX_ENTRY_ASSOCIATION:
{
gint64 ts;
GstAssocFlags flags = GST_INDEX_ASSOC_FLAGS (entry);
s = g_ptr_array_index (index_stats, entry->id);
gst_index_entry_assoc_map (entry, GST_FORMAT_TIME, &ts);
if (flags & GST_ASSOCIATION_FLAG_KEY_UNIT) {
s->num_keyframes++;
if (GST_CLOCK_TIME_IS_VALID (ts)) {
if (GST_CLOCK_TIME_IS_VALID (s->last_keyframe)) {
GstClockTimeDiff d = GST_CLOCK_DIFF (s->last_keyframe, ts);
if (G_UNLIKELY (d < 0)) {
GST_WARNING ("received out-of-order keyframe at %"
GST_TIME_FORMAT, GST_TIME_ARGS (ts));
/* FIXME: does it still make sense to use that for the statistics */
d = GST_CLOCK_DIFF (ts, s->last_keyframe);
}
if (GST_CLOCK_TIME_IS_VALID (s->min_keyframe_gap)) {
if (d < s->min_keyframe_gap)
s->min_keyframe_gap = d;
} else {
s->min_keyframe_gap = d;
}
if (GST_CLOCK_TIME_IS_VALID (s->max_keyframe_gap)) {
if (d > s->max_keyframe_gap)
s->max_keyframe_gap = d;
} else {
s->max_keyframe_gap = d;
}
if (GST_CLOCK_TIME_IS_VALID (s->avg_keyframe_gap)) {
s->avg_keyframe_gap = (d + s->num_frames * s->avg_keyframe_gap) /
(s->num_frames + 1);
} else {
s->avg_keyframe_gap = d;
}
}
s->last_keyframe = ts;
}
}
if (flags & GST_ASSOCIATION_FLAG_DELTA_UNIT) {
s->num_dltframes++;
if (GST_CLOCK_TIME_IS_VALID (ts)) {
s->last_dltframe = ts;
}
}
s->num_frames++;
break;
}
default:
break;
}
}
/* print statistics from the entry_added callback, free the entries */
static void
print_index_stats (GPtrArray * index_stats)
{
gint i;
if (index_stats->len) {
gst_print ("%s:\n", _("Index statistics"));
}
for (i = 0; i < index_stats->len; i++) {
GstIndexStats *s = g_ptr_array_index (index_stats, i);
if (s) {
gst_print ("id %d, %s\n", s->id, s->desc);
if (s->num_frames) {
GstClockTime last_frame = s->last_keyframe;
if (GST_CLOCK_TIME_IS_VALID (s->last_dltframe)) {
if (!GST_CLOCK_TIME_IS_VALID (last_frame) ||
(s->last_dltframe > last_frame))
last_frame = s->last_dltframe;
}
if (GST_CLOCK_TIME_IS_VALID (last_frame)) {
gst_print (" total time = %" GST_TIME_FORMAT "\n",
GST_TIME_ARGS (last_frame));
}
gst_print (" frame/keyframe rate = %u / %u = ", s->num_frames,
s->num_keyframes);
if (s->num_keyframes)
gst_print ("%lf\n", s->num_frames / (gdouble) s->num_keyframes);
else
gst_print ("-\n");
if (s->num_keyframes) {
gst_print (" min/avg/max keyframe gap = %" GST_TIME_FORMAT ", %"
GST_TIME_FORMAT ", %" GST_TIME_FORMAT "\n",
GST_TIME_ARGS (s->min_keyframe_gap),
GST_TIME_ARGS (s->avg_keyframe_gap),
GST_TIME_ARGS (s->max_keyframe_gap));
}
} else {
gst_print (" no stats\n");
}
g_free (s->desc);
g_free (s);
}
}
}
#endif
/* Kids, use the functions from libgstpbutils in gst-plugins-base in your
* own code (we can't do that here because it would introduce a circular
* dependency) */
static gboolean
gst_is_missing_plugin_message (GstMessage * msg)
{
if (GST_MESSAGE_TYPE (msg) != GST_MESSAGE_ELEMENT
|| gst_message_get_structure (msg) == NULL)
return FALSE;
return gst_structure_has_name (gst_message_get_structure (msg),
"missing-plugin");
}
static const gchar *
gst_missing_plugin_message_get_description (GstMessage * msg)
{
return gst_structure_get_string (gst_message_get_structure (msg), "name");
}
static void
print_error_message (GstMessage * msg)
{
GError *err = NULL;
gchar *name, *debug = NULL;
name = gst_object_get_path_string (msg->src);
gst_message_parse_error (msg, &err, &debug);
gst_printerr (_("ERROR: from element %s: %s\n"), name, err->message);
if (debug != NULL)
gst_printerr (_("Additional debug info:\n%s\n"), debug);
g_clear_error (&err);
g_free (debug);
g_free (name);
}
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 = NULL;
if (gst_tag_get_type (tag) == G_TYPE_STRING) {
if (!gst_tag_list_get_string_index (list, tag, i, &str)) {
g_warning ("Couldn't fetch string for %s tag", tag);
g_assert_not_reached ();
}
} else if (gst_tag_get_type (tag) == GST_TYPE_SAMPLE) {
GstSample *sample = NULL;
if (gst_tag_list_get_sample_index (list, tag, i, &sample)) {
GstBuffer *img = gst_sample_get_buffer (sample);
GstCaps *caps = gst_sample_get_caps (sample);
if (img) {
if (caps) {
gchar *caps_str;
caps_str = gst_caps_to_string (caps);
str = g_strdup_printf ("buffer of %" G_GSIZE_FORMAT " bytes, "
"type: %s", gst_buffer_get_size (img), caps_str);
g_free (caps_str);
} else {
str = g_strdup_printf ("buffer of %" G_GSIZE_FORMAT " bytes",
gst_buffer_get_size (img));
}
} else {
str = g_strdup ("NULL buffer");
}
} else {
g_warning ("Couldn't fetch sample for %s tag", tag);
g_assert_not_reached ();
}
gst_sample_unref (sample);
} else if (gst_tag_get_type (tag) == GST_TYPE_DATE_TIME) {
GstDateTime *dt = NULL;
gst_tag_list_get_date_time_index (list, tag, i, &dt);
if (!gst_date_time_has_time (dt)) {
str = gst_date_time_to_iso8601_string (dt);
} else {
gdouble tz_offset = gst_date_time_get_time_zone_offset (dt);
gchar tz_str[32];
if (tz_offset != 0.0) {
g_snprintf (tz_str, sizeof (tz_str), "(UTC %s%gh)",
(tz_offset > 0.0) ? "+" : "", tz_offset);
} else {
g_snprintf (tz_str, sizeof (tz_str), "(UTC)");
}
str = g_strdup_printf ("%04u-%02u-%02u %02u:%02u:%02u %s",
gst_date_time_get_year (dt), gst_date_time_get_month (dt),
gst_date_time_get_day (dt), gst_date_time_get_hour (dt),
gst_date_time_get_minute (dt), gst_date_time_get_second (dt),
tz_str);
}
gst_date_time_unref (dt);
} else {
str =
g_strdup_value_contents (gst_tag_list_get_value_index (list, tag, i));
}
if (str) {
PRINT ("%16s: %s\n", i == 0 ? gst_tag_get_nick (tag) : "", str);
g_free (str);
}
}
}
static void
print_tag_foreach (const GstTagList * tags, const gchar * tag,
gpointer user_data)
{
GValue val = { 0, };
gchar *str;
gint depth = GPOINTER_TO_INT (user_data);
if (!gst_tag_list_copy_value (&val, tags, tag))
return;
if (G_VALUE_HOLDS_STRING (&val))
str = g_value_dup_string (&val);
else
str = gst_value_serialize (&val);
gst_print ("%*s%s: %s\n", 2 * depth, " ", gst_tag_get_nick (tag), str);
g_free (str);
g_value_unset (&val);
}
#define MAX_INDENT 40
static void
print_toc_entry (gpointer data, gpointer user_data)
{
GstTocEntry *entry = (GstTocEntry *) data;
const gchar spc[MAX_INDENT + 1] = " ";
guint indent = MIN (GPOINTER_TO_UINT (user_data), MAX_INDENT);
const GstTagList *tags;
GList *subentries;
gint64 start, stop;
gst_toc_entry_get_start_stop_times (entry, &start, &stop);
PRINT ("%s%s:", &spc[MAX_INDENT - indent],
gst_toc_entry_type_get_nick (gst_toc_entry_get_entry_type (entry)));
if (GST_CLOCK_TIME_IS_VALID (start)) {
PRINT (" start: %" GST_TIME_FORMAT, GST_TIME_ARGS (start));
}
if (GST_CLOCK_TIME_IS_VALID (stop)) {
PRINT (" stop: %" GST_TIME_FORMAT, GST_TIME_ARGS (stop));
}
PRINT ("\n");
indent += 2;
/* print tags */
tags = gst_toc_entry_get_tags (entry);
if (tags)
gst_tag_list_foreach (tags, print_tag_foreach, GUINT_TO_POINTER (indent));
/* loop over sub-toc entries */
subentries = gst_toc_entry_get_sub_entries (entry);
g_list_foreach (subentries, print_toc_entry, GUINT_TO_POINTER (indent));
}
#ifdef G_OS_UNIX
static guint signal_watch_hup_id;
#endif
#if defined(G_OS_UNIX) || defined(G_OS_WIN32)
static guint signal_watch_intr_id;
#endif
#if defined(G_OS_UNIX) || defined(G_OS_WIN32)
/* As the interrupt handler is dispatched from GMainContext as a GSourceFunc
* handler, we can react to this by posting a message. */
static gboolean
intr_handler (gpointer user_data)
{
GstElement *pipeline = (GstElement *) user_data;
PRINT ("handling interrupt.\n");
/* post an application specific message */
gst_element_post_message (GST_ELEMENT (pipeline),
gst_message_new_application (GST_OBJECT (pipeline),
gst_structure_new ("GstLaunchInterrupt",
"message", G_TYPE_STRING, "Pipeline interrupted", NULL)));
/* remove signal handler */
signal_watch_intr_id = 0;
return G_SOURCE_REMOVE;
}
#ifdef G_OS_UNIX
static gboolean
hup_handler (gpointer user_data)
{
GstElement *pipeline = (GstElement *) user_data;
if (g_getenv ("GST_DEBUG_DUMP_DOT_DIR") != NULL) {
PRINT ("SIGHUP: dumping dot file snapshot ...\n");
} else {
PRINT ("SIGHUP: not dumping dot file snapshot, GST_DEBUG_DUMP_DOT_DIR "
"environment variable not set.\n");
}
/* dump graph on hup */
GST_DEBUG_BIN_TO_DOT_FILE_WITH_TS (GST_BIN (pipeline),
GST_DEBUG_GRAPH_SHOW_ALL, "gst-launch.snapshot");
return G_SOURCE_CONTINUE;
}
#endif
#if defined(G_OS_WIN32) /* G_OS_UNIX */
static BOOL WINAPI
w32_intr_handler (DWORD dwCtrlType)
{
if (pipeline)
intr_handler ((gpointer) pipeline);
SetConsoleCtrlHandler (w32_intr_handler, FALSE);
return TRUE;
}
#endif /* G_OS_WIN32 */
#endif /* G_OS_UNIX */
static void
do_initial_play (GstElement * pipeline)
{
PRINT (_("Setting pipeline to PLAYING ...\n"));
tfthen = gst_util_get_timestamp ();
if (gst_element_set_state (pipeline,
GST_STATE_PLAYING) == GST_STATE_CHANGE_FAILURE) {
gst_printerr (_("ERROR: pipeline doesn't want to play.\n"));
last_launch_code = LEC_STATE_CHANGE_FAILURE;
/* error message will be posted later */
return;
}
target_state = GST_STATE_PLAYING;
}
static gboolean
bus_handler (GstBus * bus, GstMessage * message, gpointer data)
{
{
if (messages) {
GstObject *src_obj;
const GstStructure *s;
guint32 seqnum;
seqnum = gst_message_get_seqnum (message);
s = gst_message_get_structure (message);
src_obj = GST_MESSAGE_SRC (message);
if (GST_IS_ELEMENT (src_obj)) {
PRINT (_("Got message #%u from element \"%s\" (%s): "),
(guint) seqnum, GST_ELEMENT_NAME (src_obj),
GST_MESSAGE_TYPE_NAME (message));
} else if (GST_IS_PAD (src_obj)) {
PRINT (_("Got message #%u from pad \"%s:%s\" (%s): "),
(guint) seqnum, GST_DEBUG_PAD_NAME (src_obj),
GST_MESSAGE_TYPE_NAME (message));
} else if (GST_IS_OBJECT (src_obj)) {
PRINT (_("Got message #%u from object \"%s\" (%s): "),
(guint) seqnum, GST_OBJECT_NAME (src_obj),
GST_MESSAGE_TYPE_NAME (message));
} else {
PRINT (_("Got message #%u (%s): "), (guint) seqnum,
GST_MESSAGE_TYPE_NAME (message));
}
if (s) {
gchar *sstr;
sstr = gst_structure_to_string (s);
PRINT ("%s\n", sstr);
g_free (sstr);
} else {
PRINT ("no message details\n");
}
}
switch (GST_MESSAGE_TYPE (message)) {
case GST_MESSAGE_NEW_CLOCK:
{
GstClock *clock;
gst_message_parse_new_clock (message, &clock);
PRINT ("New clock: %s\n", (clock ? GST_OBJECT_NAME (clock) : "NULL"));
break;
}
case GST_MESSAGE_CLOCK_LOST:
PRINT ("Clock lost, selecting a new one\n");
gst_element_set_state (pipeline, GST_STATE_PAUSED);
gst_element_set_state (pipeline, GST_STATE_PLAYING);
break;
case GST_MESSAGE_EOS:{
PRINT (_("Got EOS from element \"%s\".\n"),
GST_MESSAGE_SRC_NAME (message));
if (eos_on_shutdown)
PRINT (_("EOS received - stopping pipeline...\n"));
g_main_loop_quit (loop);
break;
}
case GST_MESSAGE_TAG:
if (tags) {
GstTagList *tag_list;
if (GST_IS_ELEMENT (GST_MESSAGE_SRC (message))) {
PRINT (_("FOUND TAG : found by element \"%s\".\n"),
GST_MESSAGE_SRC_NAME (message));
} else if (GST_IS_PAD (GST_MESSAGE_SRC (message))) {
PRINT (_("FOUND TAG : found by pad \"%s:%s\".\n"),
GST_DEBUG_PAD_NAME (GST_MESSAGE_SRC (message)));
} else if (GST_IS_OBJECT (GST_MESSAGE_SRC (message))) {
PRINT (_("FOUND TAG : found by object \"%s\".\n"),
GST_MESSAGE_SRC_NAME (message));
} else {
PRINT (_("FOUND TAG\n"));
}
gst_message_parse_tag (message, &tag_list);
gst_tag_list_foreach (tag_list, print_tag, NULL);
gst_tag_list_unref (tag_list);
}
break;
case GST_MESSAGE_TOC:
if (toc) {
GstToc *toc;
GList *entries;
gboolean updated;
if (GST_IS_ELEMENT (GST_MESSAGE_SRC (message))) {
PRINT (_("FOUND TOC : found by element \"%s\".\n"),
GST_MESSAGE_SRC_NAME (message));
} else if (GST_IS_OBJECT (GST_MESSAGE_SRC (message))) {
PRINT (_("FOUND TOC : found by object \"%s\".\n"),
GST_MESSAGE_SRC_NAME (message));
} else {
PRINT (_("FOUND TOC\n"));
}
gst_message_parse_toc (message, &toc, &updated);
/* recursively loop over toc entries */
entries = gst_toc_get_entries (toc);
g_list_foreach (entries, print_toc_entry, GUINT_TO_POINTER (0));
gst_toc_unref (toc);
}
break;
case GST_MESSAGE_INFO:{
GError *gerror;
gchar *debug;
gchar *name = gst_object_get_path_string (GST_MESSAGE_SRC (message));
gst_message_parse_info (message, &gerror, &debug);
if (debug) {
PRINT (_("INFO:\n%s\n"), debug);
}
g_clear_error (&gerror);
g_free (debug);
g_free (name);
break;
}
case GST_MESSAGE_WARNING:{
GError *gerror;
gchar *debug;
gchar *name = gst_object_get_path_string (GST_MESSAGE_SRC (message));
/* dump graph on warning */
GST_DEBUG_BIN_TO_DOT_FILE_WITH_TS (GST_BIN (pipeline),
GST_DEBUG_GRAPH_SHOW_ALL, "gst-launch.warning");
gst_message_parse_warning (message, &gerror, &debug);
PRINT (_("WARNING: from element %s: %s\n"), name, gerror->message);
if (debug) {
PRINT (_("Additional debug info:\n%s\n"), debug);
}
g_clear_error (&gerror);
g_free (debug);
g_free (name);
break;
}
case GST_MESSAGE_STATE_CHANGED:{
GstState old, new, pending;
/* we only care about pipeline state change messages */
if (GST_MESSAGE_SRC (message) != GST_OBJECT_CAST (pipeline))
break;
gst_message_parse_state_changed (message, &old, &new, &pending);
if (target_state == GST_STATE_PAUSED && new == target_state) {
prerolled = TRUE;
PRINT (_("Pipeline is PREROLLED ...\n"));
/* ignore when we are buffering since then we mess with the states
* ourselves. */
if (buffering) {
PRINT (_("Prerolled, waiting for buffering to finish...\n"));
break;
}
if (in_progress) {
PRINT (_("Prerolled, waiting for progress to finish...\n"));
break;
}
do_initial_play (pipeline);
}
/* else not an interesting message */
break;
}
case GST_MESSAGE_BUFFERING:{
gint percent;
gst_message_parse_buffering (message, &percent);
PRINT ("%s %d%% \r", _("buffering..."), percent);
/* no state management needed for live pipelines */
if (is_live)
break;
if (percent == 100) {
/* a 100% message means buffering is done */
buffering = FALSE;
if (target_state == GST_STATE_PAUSED) {
do_initial_play (pipeline);
break;
}
/* if the desired state is playing, go back */
if (target_state == GST_STATE_PLAYING) {
PRINT (_("Done buffering, setting pipeline to PLAYING ...\n"));
gst_element_set_state (pipeline, GST_STATE_PLAYING);
}
} else {
/* buffering busy */
if (!buffering && target_state == GST_STATE_PLAYING) {
/* we were not buffering but PLAYING, PAUSE the pipeline. */
PRINT (_("Buffering, setting pipeline to PAUSED ...\n"));
gst_element_set_state (pipeline, GST_STATE_PAUSED);
}
buffering = TRUE;
}
break;
}
case GST_MESSAGE_LATENCY:
{
PRINT (_("Redistribute latency...\n"));
gst_bin_recalculate_latency (GST_BIN (pipeline));
break;
}
case GST_MESSAGE_REQUEST_STATE:
{
GstState state;
gchar *name = gst_object_get_path_string (GST_MESSAGE_SRC (message));
gst_message_parse_request_state (message, &state);
PRINT (_("Setting state to %s as requested by %s...\n"),
gst_element_state_get_name (state), name);
gst_element_set_state (pipeline, state);
g_free (name);
break;
}
case GST_MESSAGE_APPLICATION:{
const GstStructure *s;
s = gst_message_get_structure (message);
if (gst_structure_has_name (s, "GstLaunchInterrupt")) {
/* this application message is posted when we caught an interrupt and
* we need to stop the pipeline. */
PRINT (_("Interrupt: Stopping pipeline ...\n"));
interrupting = TRUE;
if (eos_on_shutdown) {
if (waiting_eos) {
PRINT (_
("Interrupt while waiting for EOS - stopping pipeline...\n"));
g_main_loop_quit (loop);
} else {
PRINT (_
("EOS on shutdown enabled -- Forcing EOS on the pipeline\n"));
gst_element_send_event (pipeline, gst_event_new_eos ());
PRINT (_("Waiting for EOS...\n"));
waiting_eos = TRUE;
}
} else {
g_main_loop_quit (loop);
}
}
break;
}
case GST_MESSAGE_PROGRESS:
{
GstProgressType type;
gchar *code, *text;
gst_message_parse_progress (message, &type, &code, &text);
switch (type) {
case GST_PROGRESS_TYPE_START:
case GST_PROGRESS_TYPE_CONTINUE:
in_progress = TRUE;
break;
case GST_PROGRESS_TYPE_COMPLETE:
case GST_PROGRESS_TYPE_CANCELED:
case GST_PROGRESS_TYPE_ERROR:
in_progress = FALSE;
break;
default:
break;
}
PRINT (_("Progress: (%s) %s\n"), code, text);
g_free (code);
g_free (text);
if (!in_progress && prerolled && target_state == GST_STATE_PAUSED) {
do_initial_play (pipeline);
}
break;
}
case GST_MESSAGE_ELEMENT:{
if (gst_is_missing_plugin_message (message)) {
const gchar *desc;
desc = gst_missing_plugin_message_get_description (message);
PRINT (_("Missing element: %s\n"), desc ? desc : "(no description)");
}
break;
}
case GST_MESSAGE_HAVE_CONTEXT:{
GstContext *context;
const gchar *context_type;
gchar *context_str;
gst_message_parse_have_context (message, &context);
context_type = gst_context_get_context_type (context);
context_str =
gst_structure_to_string (gst_context_get_structure (context));
PRINT (_("Got context from element '%s': %s=%s\n"),
GST_ELEMENT_NAME (GST_MESSAGE_SRC (message)), context_type,
context_str);
g_free (context_str);
gst_context_unref (context);
break;
}
case GST_MESSAGE_PROPERTY_NOTIFY:{
const GValue *val;
const gchar *name;
GstObject *obj;
gchar *val_str = NULL;
gchar **ex_prop, *obj_name;
if (quiet)
break;
gst_message_parse_property_notify (message, &obj, &name, &val);
/* Let's not print anything for excluded properties... */
ex_prop = exclude_args;
while (ex_prop != NULL && *ex_prop != NULL) {
if (strcmp (name, *ex_prop) == 0)
break;
ex_prop++;
}
if (ex_prop != NULL && *ex_prop != NULL)
break;
obj_name = gst_object_get_path_string (GST_OBJECT (obj));
if (val != NULL) {
if (G_VALUE_HOLDS_STRING (val))
val_str = g_value_dup_string (val);
else if (G_VALUE_TYPE (val) == GST_TYPE_CAPS)
val_str = gst_caps_to_string (g_value_get_boxed (val));
else if (G_VALUE_TYPE (val) == GST_TYPE_TAG_LIST)
val_str = gst_tag_list_to_string (g_value_get_boxed (val));
else if (G_VALUE_TYPE (val) == GST_TYPE_STRUCTURE)
val_str = gst_structure_to_string (g_value_get_boxed (val));
else
val_str = gst_value_serialize (val);
} else {
val_str = g_strdup ("(no value)");
}
gst_print ("%s: %s = %s\n", obj_name, name, val_str);
g_free (obj_name);
g_free (val_str);
break;
}
default:
/* just be quiet by default */
break;
}
}
return TRUE;
}
static GstBusSyncReply
bus_sync_handler (GstBus * bus, GstMessage * message, gpointer data)
{
GstElement *pipeline = (GstElement *) data;
switch (GST_MESSAGE_TYPE (message)) {
case GST_MESSAGE_STATE_CHANGED:
/* we only care about pipeline state change messages */
if (GST_MESSAGE_SRC (message) == GST_OBJECT_CAST (pipeline)) {
GstState old, new, pending;
gchar *state_transition_name;
gst_message_parse_state_changed (message, &old, &new, &pending);
state_transition_name = g_strdup_printf ("%s_%s",
gst_element_state_get_name (old), gst_element_state_get_name (new));
/* dump graph for (some) pipeline state changes */
{
gchar *dump_name = g_strconcat ("gst-launch.", state_transition_name,
NULL);
GST_DEBUG_BIN_TO_DOT_FILE_WITH_TS (GST_BIN (pipeline),
GST_DEBUG_GRAPH_SHOW_ALL, dump_name);
g_free (dump_name);
}
/* place a marker into e.g. strace logs */
{
gchar *access_name = g_strconcat (g_get_tmp_dir (), G_DIR_SEPARATOR_S,
"gst-launch", G_DIR_SEPARATOR_S, state_transition_name, NULL);
g_file_test (access_name, G_FILE_TEST_EXISTS);
g_free (access_name);
}
g_free (state_transition_name);
}
break;
case GST_MESSAGE_ERROR:{
/* dump graph on error */
GST_DEBUG_BIN_TO_DOT_FILE_WITH_TS (GST_BIN (pipeline),
GST_DEBUG_GRAPH_SHOW_ALL, "gst-launch.error");
print_error_message (message);
if (target_state == GST_STATE_PAUSED) {
gst_printerr (_("ERROR: pipeline doesn't want to preroll.\n"));
} else if (interrupting) {
PRINT (_("An error happened while waiting for EOS\n"));
}
/* we have an error */
last_launch_code = LEC_ERROR;
g_main_loop_quit (loop);
break;
}
default:
break;
}
return GST_BUS_PASS;
}
static gboolean
query_pipeline_position (gpointer user_data)
{
gint64 pos = -1, dur = -1;
gboolean output_is_tty = GPOINTER_TO_INT (user_data);
if (buffering)
return G_SOURCE_CONTINUE;
gst_element_query_position (pipeline, GST_FORMAT_TIME, &pos);
gst_element_query_duration (pipeline, GST_FORMAT_TIME, &dur);
if (pos >= 0) {
gchar dstr[32], pstr[32];
/* FIXME: pretty print in nicer format */
g_snprintf (pstr, 32, "%" GST_TIME_FORMAT, GST_TIME_ARGS (pos));
pstr[9] = '\0';
g_snprintf (dstr, 32, "%" GST_TIME_FORMAT, GST_TIME_ARGS (dur));
dstr[9] = '\0';
if (dur > 0 && dur >= pos) {
gdouble percent;
percent = 100 * (gdouble) (pos) / dur;
gst_print ("%s / %s (%.1f %%)%c", pstr, dstr, percent,
output_is_tty ? '\r' : '\n');
} else
gst_print ("%s / %s%c", pstr, dstr, output_is_tty ? '\r' : '\n');
}
return G_SOURCE_CONTINUE;
}
int
main (int argc, char *argv[])
{
/* options */
gboolean verbose = FALSE;
gboolean no_fault = FALSE;
#if 0
gboolean check_index = FALSE;
#endif
gchar *savefile = NULL;
gboolean no_position = FALSE;
gboolean force_position = FALSE;
#ifndef GST_DISABLE_OPTION_PARSING
GOptionEntry options[] = {
{"tags", 't', 0, G_OPTION_ARG_NONE, &tags,
N_("Output tags (also known as metadata)"), NULL},
{"toc", 'c', 0, G_OPTION_ARG_NONE, &toc,
N_("Output TOC (chapters and editions)"), NULL},
{"verbose", 'v', 0, G_OPTION_ARG_NONE, &verbose,
N_("Output status information and property notifications"), NULL},
{"quiet", 'q', 0, G_OPTION_ARG_NONE, &quiet,
N_("Do not print any progress information"), NULL},
{"messages", 'm', 0, G_OPTION_ARG_NONE, &messages,
N_("Output messages"), NULL},
{"exclude", 'X', 0, G_OPTION_ARG_STRING_ARRAY, &exclude_args,
N_("Do not output status information for the specified property "
"if verbose output is enabled (can be used multiple times)"),
N_("PROPERTY-NAME")},
{"no-fault", 'f', 0, G_OPTION_ARG_NONE, &no_fault,
N_("Do not install a fault handler"), NULL},
{"eos-on-shutdown", 'e', 0, G_OPTION_ARG_NONE, &eos_on_shutdown,
N_("Force EOS on sources before shutting the pipeline down"), NULL},
#if 0
{"index", 'i', 0, G_OPTION_ARG_NONE, &check_index,
N_("Gather and print index statistics"), NULL},
#endif
GST_TOOLS_GOPTION_VERSION,
{"no-position", '\0', 0, G_OPTION_ARG_NONE, &no_position,
N_("Do not print current position of pipeline. "
"If this option is unspecified, the position will be printed "
"when stdout is a TTY. "
"To enable printing position when stdout is not a TTY, "
"use \"force-position\" option"), NULL},
{"force-position", '\0', 0, G_OPTION_ARG_NONE, &force_position,
N_("Allow printing current position of pipeline even if "
"stdout is not a TTY. This option has no effect if "
"the \"no-position\" option is specified"),
NULL},
{NULL}
};
GOptionContext *ctx;
GError *err = NULL;
#endif
#if 0
GstIndex *index;
GPtrArray *index_stats = NULL;
#endif
gchar **argvn;
GError *error = NULL;
gulong deep_notify_id = 0;
guint bus_watch_id = 0;
GSource *position_source = NULL;
free (malloc (8)); /* -lefence */
setlocale (LC_ALL, "");
#ifdef ENABLE_NLS
bindtextdomain (GETTEXT_PACKAGE, LOCALEDIR);
bind_textdomain_codeset (GETTEXT_PACKAGE, "UTF-8");
textdomain (GETTEXT_PACKAGE);
#endif
g_set_prgname ("gst-launch-" GST_API_VERSION);
/* Ensure XInitThreads() is called if/when needed */
g_setenv ("GST_GL_XINITTHREADS", "1", TRUE);
#ifndef GST_DISABLE_OPTION_PARSING
ctx = g_option_context_new ("PIPELINE-DESCRIPTION");
g_option_context_add_main_entries (ctx, options, GETTEXT_PACKAGE);
g_option_context_add_group (ctx, gst_init_get_option_group ());
if (!g_option_context_parse (ctx, &argc, &argv, &err)) {
if (err)
gst_printerr ("Error initializing: %s\n", GST_STR_NULL (err->message));
else
gst_printerr ("Error initializing: Unknown error!\n");
g_clear_error (&err);
g_option_context_free (ctx);
exit (1);
}
g_option_context_free (ctx);
#else
gst_init (&argc, &argv);
#endif
gst_tools_print_version ();
#ifdef G_OS_UNIX
if (!no_fault)
fault_setup ();
#endif
/* make a null-terminated version of argv */
argvn = g_new0 (char *, argc);
memcpy (argvn, argv + 1, sizeof (char *) * (argc - 1));
{
pipeline =
(GstElement *) gst_parse_launchv ((const gchar **) argvn, &error);
}
g_free (argvn);
if (!pipeline) {
if (error) {
gst_printerr (_("ERROR: pipeline could not be constructed: %s.\n"),
GST_STR_NULL (error->message));
g_clear_error (&error);
} else {
gst_printerr (_("ERROR: pipeline could not be constructed.\n"));
}
return 1;
} else if (error) {
gst_printerr (_("WARNING: erroneous pipeline: %s\n"),
GST_STR_NULL (error->message));
g_clear_error (&error);
return 1;
}
loop = g_main_loop_new (NULL, FALSE);
if (!savefile) {
GstStateChangeReturn ret;
GstBus *bus;
/* If the top-level object is not a pipeline, place it in a pipeline. */
if (!GST_IS_PIPELINE (pipeline)) {
GstElement *real_pipeline = gst_element_factory_make ("pipeline", NULL);
if (real_pipeline == NULL) {
gst_printerr (_("ERROR: the 'pipeline' element wasn't found.\n"));
return 1;
}
gst_bin_add (GST_BIN (real_pipeline), pipeline);
pipeline = real_pipeline;
}
if (verbose) {
deep_notify_id =
gst_element_add_property_deep_notify_watch (pipeline, NULL, TRUE);
}
#if 0
if (check_index) {
/* gst_index_new() creates a null-index, it does not store anything, but
* the entry-added signal works and this is what we use to build the
* statistics */
index = gst_index_new ();
if (index) {
index_stats = g_ptr_array_new ();
g_signal_connect (G_OBJECT (index), "entry-added",
G_CALLBACK (entry_added), index_stats);
g_object_set (G_OBJECT (index), "resolver", GST_INDEX_RESOLVER_GTYPE,
NULL);
gst_element_set_index (pipeline, index);
}
}
#endif
bus = gst_element_get_bus (pipeline);
gst_bus_set_sync_handler (bus, bus_sync_handler, (gpointer) pipeline, NULL);
bus_watch_id = gst_bus_add_watch (bus, bus_handler, NULL);
gst_object_unref (bus);
PRINT (_("Setting pipeline to PAUSED ...\n"));
ret = gst_element_set_state (pipeline, GST_STATE_PAUSED);
switch (ret) {
case GST_STATE_CHANGE_FAILURE:
gst_printerr (_("Failed to set pipeline to PAUSED.\n"));
last_launch_code = LEC_STATE_CHANGE_FAILURE;
goto end;
case GST_STATE_CHANGE_NO_PREROLL:
PRINT (_("Pipeline is live and does not need PREROLL ...\n"));
is_live = TRUE;
break;
case GST_STATE_CHANGE_ASYNC:
PRINT (_("Pipeline is PREROLLING ...\n"));
break;
default:
break;
}
#ifdef G_OS_UNIX
signal_watch_intr_id =
g_unix_signal_add (SIGINT, (GSourceFunc) intr_handler, pipeline);
signal_watch_hup_id =
g_unix_signal_add (SIGHUP, (GSourceFunc) hup_handler, pipeline);
#elif defined(G_OS_WIN32)
SetConsoleCtrlHandler (w32_intr_handler, TRUE);
#endif
if (!no_position) {
gboolean output_is_tty = TRUE;
if (!isatty (STDOUT_FILENO))
output_is_tty = FALSE;
if (output_is_tty || (!output_is_tty && force_position)) {
position_source = g_timeout_source_new (100);
g_source_set_callback (position_source, query_pipeline_position,
GINT_TO_POINTER (output_is_tty), NULL);
g_source_attach (position_source, NULL);
}
}
/* playing state will be set on state-changed message handler */
g_main_loop_run (loop);
if (position_source) {
g_source_destroy (position_source);
g_source_unref (position_source);
}
{
GstClockTime tfnow;
GstClockTimeDiff diff;
if (GST_CLOCK_TIME_IS_VALID (tfthen)) {
tfnow = gst_util_get_timestamp ();
diff = GST_CLOCK_DIFF (tfthen, tfnow);
PRINT (_("Execution ended after %" GST_TIME_FORMAT "\n"),
GST_TIME_ARGS (diff));
}
}
/* No need to see all those pad caps going to NULL etc., it's just noise */
if (deep_notify_id != 0)
g_signal_handler_disconnect (pipeline, deep_notify_id);
#if 0
if (check_index) {
print_index_stats (index_stats);
g_ptr_array_free (index_stats, TRUE);
}
#endif
end:
PRINT (_("Setting pipeline to NULL ...\n"));
gst_element_set_state (pipeline, GST_STATE_NULL);
#ifdef G_OS_UNIX
if (signal_watch_intr_id > 0)
g_source_remove (signal_watch_intr_id);
if (signal_watch_hup_id > 0)
g_source_remove (signal_watch_hup_id);
#endif
g_source_remove (bus_watch_id);
g_main_loop_unref (loop);
}
PRINT (_("Freeing pipeline ...\n"));
gst_object_unref (pipeline);
gst_deinit ();
return last_launch_code;
}
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