--- /dev/null
+/* GStreamer command line playback testing utility - keyboard handling helpers
+ *
+ * Copyright (C) 2013 Tim-Philipp Müller <tim centricular net>
+ * Copyright (C) 2013 Centricular Ltd
+ *
+ * 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 "ges-launcher-kb.h"
+
+#include <stdlib.h>
+#include <stdio.h>
+#include <string.h>
+
+#ifdef G_OS_UNIX
+#include <unistd.h>
+#include <termios.h>
+#endif
+
+#ifdef G_OS_WIN32
+#include <windows.h>
+#include <io.h>
+#endif
+
+#include <gst/gst.h>
+
+/* This is all not thread-safe, but doesn't have to be really */
+static GstPlayKbFunc kb_callback;
+static gpointer kb_callback_data;
+
+#ifdef G_OS_UNIX
+static struct termios term_settings;
+static gboolean term_settings_saved = FALSE;
+static gulong io_watch_id;
+
+static gboolean
+gst_play_kb_io_cb (GIOChannel * ioc, GIOCondition cond, gpointer user_data)
+{
+ GIOStatus status;
+
+ if (cond & G_IO_IN) {
+ gchar buf[16] = { 0, };
+ gsize read;
+
+ status = g_io_channel_read_chars (ioc, buf, sizeof (buf) - 1, &read, NULL);
+ if (status == G_IO_STATUS_ERROR)
+ return FALSE;
+ if (status == G_IO_STATUS_NORMAL) {
+ if (kb_callback)
+ kb_callback (buf, kb_callback_data);
+ }
+ }
+
+ return TRUE; /* call us again */
+}
+
+gboolean
+gst_play_kb_set_key_handler (GstPlayKbFunc kb_func, gpointer user_data)
+{
+ GIOChannel *ioc;
+
+ if (!isatty (STDIN_FILENO)) {
+ GST_INFO ("stdin is not connected to a terminal");
+ return FALSE;
+ }
+
+ if (io_watch_id > 0) {
+ g_source_remove (io_watch_id);
+ io_watch_id = 0;
+ }
+
+ if (kb_func == NULL && term_settings_saved) {
+ /* restore terminal settings */
+ if (tcsetattr (STDIN_FILENO, TCSAFLUSH, &term_settings) == 0)
+ term_settings_saved = FALSE;
+ else
+ g_warning ("could not restore terminal attributes");
+
+ setvbuf (stdin, NULL, _IOLBF, 0);
+ }
+
+ if (kb_func != NULL) {
+ struct termios new_settings;
+
+ if (!term_settings_saved) {
+ if (tcgetattr (STDIN_FILENO, &term_settings) != 0) {
+ g_warning ("could not save terminal attributes");
+ return FALSE;
+ }
+ term_settings_saved = TRUE;
+
+ /* Echo off, canonical mode off, extended input processing off */
+ new_settings = term_settings;
+ new_settings.c_lflag &= ~(ECHO | ICANON | IEXTEN);
+ new_settings.c_cc[VMIN] = 0;
+ new_settings.c_cc[VTIME] = 0;
+
+ if (tcsetattr (STDIN_FILENO, TCSAFLUSH, &new_settings) != 0) {
+ g_warning ("Could not set terminal state");
+ return FALSE;
+ }
+ setvbuf (stdin, NULL, _IONBF, 0);
+ }
+ }
+
+ ioc = g_io_channel_unix_new (STDIN_FILENO);
+
+ io_watch_id = g_io_add_watch_full (ioc, G_PRIORITY_DEFAULT, G_IO_IN,
+ (GIOFunc) gst_play_kb_io_cb, user_data, NULL);
+ g_io_channel_unref (ioc);
+
+ kb_callback = kb_func;
+ kb_callback_data = user_data;
+
+ return TRUE;
+}
+
+#elif defined(G_OS_WIN32)
+
+typedef struct
+{
+ GThread *thread;
+ HANDLE event_handle;
+ HANDLE console_handle;
+ gboolean closing;
+ GMutex lock;
+} Win32KeyHandler;
+
+static Win32KeyHandler *win32_handler = NULL;
+
+static gboolean
+gst_play_kb_source_cb (Win32KeyHandler * handler)
+{
+ HANDLE h_input = handler->console_handle;
+ INPUT_RECORD buffer;
+ DWORD n;
+
+ if (PeekConsoleInput (h_input, &buffer, 1, &n) && n == 1) {
+ ReadConsoleInput (h_input, &buffer, 1, &n);
+
+ if (buffer.EventType == KEY_EVENT && buffer.Event.KeyEvent.bKeyDown) {
+ gchar key_val[2] = { 0 };
+
+ switch (buffer.Event.KeyEvent.wVirtualKeyCode) {
+ case VK_RIGHT:
+ kb_callback (GST_PLAY_KB_ARROW_RIGHT, kb_callback_data);
+ break;
+ case VK_LEFT:
+ kb_callback (GST_PLAY_KB_ARROW_LEFT, kb_callback_data);
+ break;
+ case VK_UP:
+ kb_callback (GST_PLAY_KB_ARROW_UP, kb_callback_data);
+ break;
+ case VK_DOWN:
+ kb_callback (GST_PLAY_KB_ARROW_DOWN, kb_callback_data);
+ break;
+ default:
+ key_val[0] = buffer.Event.KeyEvent.uChar.AsciiChar;
+ kb_callback (key_val, kb_callback_data);
+ break;
+ }
+ }
+ }
+
+ return G_SOURCE_REMOVE;
+}
+
+static gpointer
+gst_play_kb_win32_thread (gpointer user_data)
+{
+ Win32KeyHandler *handler = (Win32KeyHandler *) user_data;
+ HANDLE handles[2];
+
+ handles[0] = handler->event_handle;
+ handles[1] = handler->console_handle;
+
+ if (!kb_callback)
+ return NULL;
+
+ while (TRUE) {
+ DWORD ret = WaitForMultipleObjects (2, handles, FALSE, INFINITE);
+
+ if (ret == WAIT_FAILED) {
+ GST_WARNING ("WaitForMultipleObject Failed");
+ return NULL;
+ }
+
+ g_mutex_lock (&handler->lock);
+ if (handler->closing) {
+ g_mutex_unlock (&handler->lock);
+
+ return NULL;
+ }
+ g_mutex_unlock (&handler->lock);
+
+ g_idle_add ((GSourceFunc) gst_play_kb_source_cb, handler);
+ }
+
+ return NULL;
+}
+
+gboolean
+gst_play_kb_set_key_handler (GstPlayKbFunc kb_func, gpointer user_data)
+{
+ gint fd = _fileno (stdin);
+
+ if (!_isatty (fd)) {
+ GST_INFO ("stdin is not connected to a terminal");
+ return FALSE;
+ }
+
+ if (win32_handler) {
+ g_mutex_lock (&win32_handler->lock);
+ win32_handler->closing = TRUE;
+ g_mutex_unlock (&win32_handler->lock);
+
+ SetEvent (win32_handler->event_handle);
+ g_thread_join (win32_handler->thread);
+ CloseHandle (win32_handler->event_handle);
+
+ g_mutex_clear (&win32_handler->lock);
+ g_free (win32_handler);
+ win32_handler = NULL;
+ }
+
+ if (kb_func) {
+ SECURITY_ATTRIBUTES sec_attrs;
+
+ sec_attrs.nLength = sizeof (SECURITY_ATTRIBUTES);
+ sec_attrs.lpSecurityDescriptor = NULL;
+ sec_attrs.bInheritHandle = FALSE;
+
+ win32_handler = g_new0 (Win32KeyHandler, 1);
+
+ /* create cancellable event handle */
+ win32_handler->event_handle = CreateEvent (&sec_attrs, TRUE, FALSE, NULL);
+
+ if (!win32_handler->event_handle) {
+ GST_WARNING ("Couldn't create event handle");
+ g_free (win32_handler);
+ win32_handler = NULL;
+
+ return FALSE;
+ }
+
+ win32_handler->console_handle = GetStdHandle (STD_INPUT_HANDLE);
+ if (!win32_handler->console_handle) {
+ GST_WARNING ("Couldn't get console handle");
+ CloseHandle (win32_handler->event_handle);
+ g_free (win32_handler);
+ win32_handler = NULL;
+
+ return FALSE;
+ }
+
+ g_mutex_init (&win32_handler->lock);
+ win32_handler->thread =
+ g_thread_new ("gst-play-kb", gst_play_kb_win32_thread, win32_handler);
+ }
+
+ kb_callback = kb_func;
+ kb_callback_data = user_data;
+
+ return TRUE;
+}
+
+#else
+
+gboolean
+gst_play_kb_set_key_handler (GstPlayKbFunc key_func, gpointer user_data)
+{
+ GST_FIXME ("Keyboard handling for this OS needs to be implemented");
+ return FALSE;
+}
+
+#endif /* !G_OS_UNIX */
#include "ges-launcher.h"
#include "ges-validate.h"
#include "utils.h"
+#include "ges-launcher-kb.h"
+
+typedef enum
+{
+ GST_PLAY_TRICK_MODE_NONE = 0,
+ GST_PLAY_TRICK_MODE_DEFAULT,
+ GST_PLAY_TRICK_MODE_DEFAULT_NO_AUDIO,
+ GST_PLAY_TRICK_MODE_KEY_UNITS,
+ GST_PLAY_TRICK_MODE_KEY_UNITS_NO_AUDIO,
+ GST_PLAY_TRICK_MODE_INSTANT_RATE,
+ GST_PLAY_TRICK_MODE_LAST
+} GstPlayTrickMode;
struct _GESLauncherPrivate
{
guint signal_watch_id;
#endif
GESLauncherParsedOptions parsed_options;
+
+ GstPlayTrickMode trick_mode;
+ gdouble rate;
+
+ GstState desired_state; /* as per user interaction, PAUSED or PLAYING */
};
G_DEFINE_TYPE_WITH_PRIVATE (GESLauncher, ges_launcher, G_TYPE_APPLICATION);
" By default, ges-launch-1.0 is in \"playback-mode\".";
static gboolean
+play_do_seek (GESLauncher * self, gint64 pos, gdouble rate,
+ GstPlayTrickMode mode)
+{
+ GstSeekFlags seek_flags;
+ GstEvent *seek;
+
+ seek_flags = 0;
+
+ switch (mode) {
+ case GST_PLAY_TRICK_MODE_DEFAULT:
+ seek_flags |= GST_SEEK_FLAG_TRICKMODE;
+ break;
+ case GST_PLAY_TRICK_MODE_DEFAULT_NO_AUDIO:
+ seek_flags |= GST_SEEK_FLAG_TRICKMODE | GST_SEEK_FLAG_TRICKMODE_NO_AUDIO;
+ break;
+ case GST_PLAY_TRICK_MODE_KEY_UNITS:
+ seek_flags |= GST_SEEK_FLAG_TRICKMODE_KEY_UNITS;
+ break;
+ case GST_PLAY_TRICK_MODE_KEY_UNITS_NO_AUDIO:
+ seek_flags |=
+ GST_SEEK_FLAG_TRICKMODE_KEY_UNITS | GST_SEEK_FLAG_TRICKMODE_NO_AUDIO;
+ break;
+ case GST_PLAY_TRICK_MODE_NONE:
+ default:
+ break;
+ }
+
+ /* See if we can do an instant rate change (not changing dir) */
+ if (mode & GST_PLAY_TRICK_MODE_INSTANT_RATE && rate * self->priv->rate > 0) {
+ seek = gst_event_new_seek (rate, GST_FORMAT_TIME,
+ seek_flags | GST_SEEK_FLAG_INSTANT_RATE_CHANGE,
+ GST_SEEK_TYPE_NONE, GST_CLOCK_TIME_NONE,
+ GST_SEEK_TYPE_NONE, GST_CLOCK_TIME_NONE);
+ if (gst_element_send_event (GST_ELEMENT (self->priv->pipeline), seek)) {
+ goto done;
+ }
+ }
+
+ /* No instant rate change, need to do a flushing seek */
+ seek_flags |= GST_SEEK_FLAG_FLUSH;
+ if (rate >= 0)
+ seek = gst_event_new_seek (rate, GST_FORMAT_TIME,
+ seek_flags | GST_SEEK_FLAG_ACCURATE,
+ /* start */ GST_SEEK_TYPE_SET, pos,
+ /* stop */ GST_SEEK_TYPE_SET, GST_CLOCK_TIME_NONE);
+ else
+ seek = gst_event_new_seek (rate, GST_FORMAT_TIME,
+ seek_flags | GST_SEEK_FLAG_ACCURATE,
+ /* start */ GST_SEEK_TYPE_SET, 0,
+ /* stop */ GST_SEEK_TYPE_SET, pos);
+
+ if (!gst_element_send_event (GST_ELEMENT (self->priv->pipeline), seek))
+ return FALSE;
+
+done:
+ self->priv->rate = rate;
+ self->priv->trick_mode = mode & ~GST_PLAY_TRICK_MODE_INSTANT_RATE;
+ return TRUE;
+}
+
+static void
+restore_terminal (void)
+{
+ gst_play_kb_set_key_handler (NULL, NULL);
+}
+
+static void
+toggle_paused (GESLauncher * self)
+{
+ if (self->priv->desired_state == GST_STATE_PLAYING)
+ self->priv->desired_state = GST_STATE_PAUSED;
+ else
+ self->priv->desired_state = GST_STATE_PLAYING;
+
+ gst_element_set_state (GST_ELEMENT (self->priv->pipeline),
+ self->priv->desired_state);
+}
+
+static void
+relative_seek (GESLauncher * self, gdouble percent)
+{
+ gint64 pos = -1, step, dur;
+
+ g_return_if_fail (percent >= -1.0 && percent <= 1.0);
+
+ if (!gst_element_query_position (GST_ELEMENT (self->priv->pipeline),
+ GST_FORMAT_TIME, &pos))
+ goto seek_failed;
+
+ if (!gst_element_query_duration (GST_ELEMENT (self->priv->pipeline),
+ GST_FORMAT_TIME, &dur)) {
+ goto seek_failed;
+ }
+
+ step = dur * percent;
+ if (ABS (step) < GST_SECOND)
+ step = (percent < 0) ? -GST_SECOND : GST_SECOND;
+
+ pos = pos + step;
+ if (pos > dur) {
+ gst_print ("\n%s\n", "Reached end of self list.");
+ g_application_quit (G_APPLICATION (self));
+ } else {
+ if (pos < 0)
+ pos = 0;
+
+ play_do_seek (self, pos, self->priv->rate, self->priv->trick_mode);
+ }
+
+ return;
+
+seek_failed:
+ {
+ gst_print ("\nCould not seek.\n");
+ }
+}
+
+static gboolean
+play_set_rate_and_trick_mode (GESLauncher * self, gdouble rate,
+ GstPlayTrickMode mode)
+{
+ gint64 pos = -1;
+
+ g_return_val_if_fail (rate != 0, FALSE);
+
+ if (!gst_element_query_position (GST_ELEMENT (self->priv->pipeline),
+ GST_FORMAT_TIME, &pos))
+ return FALSE;
+
+ return play_do_seek (self, pos, rate, mode);
+}
+
+static void
+play_set_playback_rate (GESLauncher * self, gdouble rate)
+{
+ GstPlayTrickMode mode = self->priv->trick_mode;
+
+ if (play_set_rate_and_trick_mode (self, rate, mode)) {
+ gst_print ("Playback rate: %.2f", rate);
+ gst_print (" \n");
+ } else {
+ gst_print ("\n");
+ gst_print ("Could not change playback rate to %.2f", rate);
+ gst_print (".\n");
+ }
+}
+
+static void
+play_set_relative_playback_rate (GESLauncher * self, gdouble rate_step,
+ gboolean reverse_direction)
+{
+ gdouble new_rate = self->priv->rate + rate_step;
+
+ play_set_playback_rate (self, new_rate);
+}
+
+static const gchar *
+trick_mode_get_description (GstPlayTrickMode mode)
+{
+ switch (mode) {
+ case GST_PLAY_TRICK_MODE_NONE:
+ return "normal playback, trick modes disabled";
+ case GST_PLAY_TRICK_MODE_DEFAULT:
+ return "trick mode: default";
+ case GST_PLAY_TRICK_MODE_DEFAULT_NO_AUDIO:
+ return "trick mode: default, no audio";
+ case GST_PLAY_TRICK_MODE_KEY_UNITS:
+ return "trick mode: key frames only";
+ case GST_PLAY_TRICK_MODE_KEY_UNITS_NO_AUDIO:
+ return "trick mode: key frames only, no audio";
+ default:
+ break;
+ }
+ return "unknown trick mode";
+}
+
+static void
+play_switch_trick_mode (GESLauncher * self)
+{
+ GstPlayTrickMode new_mode = ++self->priv->trick_mode;
+ const gchar *mode_desc;
+
+ if (new_mode == GST_PLAY_TRICK_MODE_LAST)
+ new_mode = GST_PLAY_TRICK_MODE_NONE;
+
+ mode_desc = trick_mode_get_description (new_mode);
+
+ if (play_set_rate_and_trick_mode (self, self->priv->rate, new_mode)) {
+ gst_print ("Rate: %.2f (%s) \n", self->priv->rate,
+ mode_desc);
+ } else {
+ gst_print ("\nCould not change trick mode to %s.\n", mode_desc);
+ }
+}
+
+static void
+print_keyboard_help (void)
+{
+ static struct
+ {
+ const gchar *key_desc;
+ const gchar *key_help;
+ } key_controls[] = {
+ {
+ "space", "pause/unpause"}, {
+ "q or ESC", "quit"}, {
+ "\342\206\222", "seek forward"}, {
+ "\342\206\220", "seek backward"}, {
+ "+", "increase playback rate"}, {
+ "-", "decrease playback rate"}, {
+ "t", "enable/disable trick modes"}, {
+ "s", "change subtitle track"}, {
+ "0", "seek to beginning"}, {
+ "k", "show keyboard shortcuts"},};
+ guint i, chars_to_pad, desc_len, max_desc_len = 0;
+
+ gst_print ("\n\n%s\n\n", "Interactive mode - keyboard controls:");
+
+ for (i = 0; i < G_N_ELEMENTS (key_controls); ++i) {
+ desc_len = g_utf8_strlen (key_controls[i].key_desc, -1);
+ max_desc_len = MAX (max_desc_len, desc_len);
+ }
+ ++max_desc_len;
+
+ for (i = 0; i < G_N_ELEMENTS (key_controls); ++i) {
+ chars_to_pad = max_desc_len - g_utf8_strlen (key_controls[i].key_desc, -1);
+ gst_print ("\t%s", key_controls[i].key_desc);
+ gst_print ("%-*s: ", chars_to_pad, "");
+ gst_print ("%s\n", key_controls[i].key_help);
+ }
+ gst_print ("\n");
+}
+
+static gboolean
_parse_track_type (const gchar * option_name, const gchar * value,
GESLauncherParsedOptions * opts, GError ** error)
{
"Embed nested timelines when saving.",
}
,
+ {"no-interactive", 0, G_OPTION_FLAG_REVERSE, G_OPTION_ARG_NONE,
+ &opts->interactive,
+ "Disable interactive control via the keyboard", NULL}
+ ,
{NULL}
};
}
static void
+keyboard_cb (const gchar * key_input, gpointer user_data)
+{
+ GESLauncher *self = (GESLauncher *) user_data;
+ gchar key = '\0';
+
+ /* only want to switch/case on single char, not first char of string */
+ if (key_input[0] != '\0' && key_input[1] == '\0')
+ key = g_ascii_tolower (key_input[0]);
+
+ switch (key) {
+ case 'k':
+ print_keyboard_help ();
+ break;
+ case ' ':
+ toggle_paused (self);
+ break;
+ case 'q':
+ case 'Q':
+ g_application_quit (G_APPLICATION (self));
+ break;
+ case '+':
+ if (ABS (self->priv->rate) < 2.0)
+ play_set_relative_playback_rate (self, 0.1, FALSE);
+ else if (ABS (self->priv->rate) < 4.0)
+ play_set_relative_playback_rate (self, 0.5, FALSE);
+ else
+ play_set_relative_playback_rate (self, 1.0, FALSE);
+ break;
+ case '-':
+ if (ABS (self->priv->rate) <= 2.0)
+ play_set_relative_playback_rate (self, -0.1, FALSE);
+ else if (ABS (self->priv->rate) <= 4.0)
+ play_set_relative_playback_rate (self, -0.5, FALSE);
+ else
+ play_set_relative_playback_rate (self, -1.0, FALSE);
+ break;
+ case 't':
+ play_switch_trick_mode (self);
+ break;
+ case 27: /* ESC */
+ if (key_input[1] == '\0') {
+ g_application_quit (G_APPLICATION (self));
+ break;
+ }
+ case '0':
+ play_do_seek (self, 0, self->priv->rate, self->priv->trick_mode);
+ break;
+ default:
+ if (strcmp (key_input, GST_PLAY_KB_ARROW_RIGHT) == 0) {
+ relative_seek (self, +0.08);
+ } else if (strcmp (key_input, GST_PLAY_KB_ARROW_LEFT) == 0) {
+ relative_seek (self, -0.01);
+ } else {
+ GST_INFO ("keyboard input:");
+ for (; *key_input != '\0'; ++key_input)
+ GST_INFO (" code %3d", *key_input);
+ }
+ break;
+ }
+}
+
+static void
_startup (GApplication * application)
{
GESLauncher *self = GES_LAUNCHER (application);
goto done;
}
+ if (opts->interactive && !opts->outputuri) {
+ if (gst_play_kb_set_key_handler (keyboard_cb, self)) {
+ gst_print ("Press 'k' to see a list of keyboard shortcuts.\n");
+ atexit (restore_terminal);
+ } else {
+ gst_print ("Interactive keyboard handling in terminal not available.\n");
+ }
+ }
+
if (opts->list_transitions) {
_print_transition_list ();
goto done;
self->priv = ges_launcher_get_instance_private (self);
self->priv->parsed_options.track_types =
GES_TRACK_TYPE_AUDIO | GES_TRACK_TYPE_VIDEO;
+ self->priv->parsed_options.interactive = TRUE;
+ self->priv->desired_state = GST_STATE_PLAYING;
+ self->priv->rate = 1.0;
+ self->priv->trick_mode = GST_PLAY_TRICK_MODE_NONE;
}
gint
projects / platform / upstream / gstreamer.git / commitdiff