1 /* GStreamer command line playback testing utility - keyboard handling helpers
3 * Copyright (C) 2013 Tim-Philipp Müller <tim centricular net>
4 * Copyright (C) 2013 Centricular Ltd
6 * This library is free software; you can redistribute it and/or
7 * modify it under the terms of the GNU Library General Public
8 * License as published by the Free Software Foundation; either
9 * version 2 of the License, or (at your option) any later version.
11 * This library is distributed in the hope that it will be useful,
12 * but WITHOUT ANY WARRANTY; without even the implied warranty of
13 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
14 * Library General Public License for more details.
16 * You should have received a copy of the GNU Library General Public
17 * License along with this library; if not, write to the
18 * Free Software Foundation, Inc., 51 Franklin St, Fifth Floor,
19 * Boston, MA 02110-1301, USA.
26 #include "gst-play-kb.h"
44 /* This is all not thread-safe, but doesn't have to be really */
45 static GstPlayKbFunc kb_callback;
46 static gpointer kb_callback_data;
49 static struct termios term_settings;
50 static gboolean term_settings_saved = FALSE;
51 static gulong io_watch_id;
54 gst_play_kb_io_cb (GIOChannel * ioc, GIOCondition cond, gpointer user_data)
59 gchar buf[16] = { 0, };
62 status = g_io_channel_read_chars (ioc, buf, sizeof (buf) - 1, &read, NULL);
63 if (status == G_IO_STATUS_ERROR)
65 if (status == G_IO_STATUS_NORMAL) {
67 kb_callback (buf, kb_callback_data);
71 return TRUE; /* call us again */
75 gst_play_kb_set_key_handler (GstPlayKbFunc kb_func, gpointer user_data)
79 if (!isatty (STDIN_FILENO)) {
80 GST_INFO ("stdin is not connected to a terminal");
84 if (io_watch_id > 0) {
85 g_source_remove (io_watch_id);
89 if (kb_func == NULL && term_settings_saved) {
90 /* restore terminal settings */
91 if (tcsetattr (STDIN_FILENO, TCSAFLUSH, &term_settings) == 0)
92 term_settings_saved = FALSE;
94 g_warning ("could not restore terminal attributes");
96 setvbuf (stdin, NULL, _IOLBF, 0);
99 if (kb_func != NULL) {
100 struct termios new_settings;
102 if (!term_settings_saved) {
103 if (tcgetattr (STDIN_FILENO, &term_settings) != 0) {
104 g_warning ("could not save terminal attributes");
107 term_settings_saved = TRUE;
109 /* Echo off, canonical mode off, extended input processing off */
110 new_settings = term_settings;
111 new_settings.c_lflag &= ~(ECHO | ICANON | IEXTEN);
112 new_settings.c_cc[VMIN] = 0;
113 new_settings.c_cc[VTIME] = 0;
115 if (tcsetattr (STDIN_FILENO, TCSAFLUSH, &new_settings) != 0) {
116 g_warning ("Could not set terminal state");
119 setvbuf (stdin, NULL, _IONBF, 0);
123 ioc = g_io_channel_unix_new (STDIN_FILENO);
125 io_watch_id = g_io_add_watch_full (ioc, G_PRIORITY_DEFAULT, G_IO_IN,
126 (GIOFunc) gst_play_kb_io_cb, user_data, NULL);
127 g_io_channel_unref (ioc);
129 kb_callback = kb_func;
130 kb_callback_data = user_data;
135 #elif defined(G_OS_WIN32)
141 HANDLE console_handle;
146 static Win32KeyHandler *win32_handler = NULL;
156 gst_play_kb_source_cb (KbSourceData * data)
159 return G_SOURCE_REMOVE;
161 if (data->is_ascii) {
162 kb_callback (data->key_val, kb_callback_data);
164 switch (data->vkcode) {
166 kb_callback (GST_PLAY_KB_ARROW_RIGHT, kb_callback_data);
169 kb_callback (GST_PLAY_KB_ARROW_LEFT, kb_callback_data);
172 kb_callback (GST_PLAY_KB_ARROW_UP, kb_callback_data);
175 kb_callback (GST_PLAY_KB_ARROW_DOWN, kb_callback_data);
182 return G_SOURCE_REMOVE;
186 gst_play_kb_win32_thread (gpointer user_data)
188 Win32KeyHandler *handler = (Win32KeyHandler *) user_data;
193 handles[0] = handler->event_handle;
194 handles[1] = handler->console_handle;
200 DWORD ret = WaitForMultipleObjects (2, handles, FALSE, INFINITE);
202 if (ret == WAIT_FAILED) {
203 GST_WARNING ("WaitForMultipleObject Failed");
207 g_mutex_lock (&handler->lock);
208 if (handler->closing) {
209 g_mutex_unlock (&handler->lock);
213 g_mutex_unlock (&handler->lock);
215 if (PeekConsoleInput (handler->console_handle, &buffer, 1, &n) && n == 1) {
216 if (ReadConsoleInput (handler->console_handle, &buffer, 1, &n) &&
217 buffer.EventType == KEY_EVENT && buffer.Event.KeyEvent.bKeyDown) {
218 KbSourceData *data = g_new0 (KbSourceData, 1);
220 switch (buffer.Event.KeyEvent.wVirtualKeyCode) {
225 data->is_ascii = FALSE;
226 data->vkcode = buffer.Event.KeyEvent.wVirtualKeyCode;
229 data->is_ascii = TRUE;
230 data->key_val[0] = buffer.Event.KeyEvent.uChar.AsciiChar;
231 data->key_val[1] = '\0';
235 g_idle_add_full (G_PRIORITY_DEFAULT_IDLE,
236 (GSourceFunc) gst_play_kb_source_cb, data, g_free);
245 gst_play_kb_set_key_handler (GstPlayKbFunc kb_func, gpointer user_data)
247 gint fd = _fileno (stdin);
250 GST_INFO ("stdin is not connected to a terminal");
255 g_mutex_lock (&win32_handler->lock);
256 win32_handler->closing = TRUE;
257 g_mutex_unlock (&win32_handler->lock);
259 SetEvent (win32_handler->event_handle);
260 g_thread_join (win32_handler->thread);
261 CloseHandle (win32_handler->event_handle);
263 g_mutex_clear (&win32_handler->lock);
264 g_free (win32_handler);
265 win32_handler = NULL;
269 SECURITY_ATTRIBUTES sec_attrs;
271 sec_attrs.nLength = sizeof (SECURITY_ATTRIBUTES);
272 sec_attrs.lpSecurityDescriptor = NULL;
273 sec_attrs.bInheritHandle = FALSE;
275 win32_handler = g_new0 (Win32KeyHandler, 1);
277 /* create cancellable event handle */
278 win32_handler->event_handle = CreateEvent (&sec_attrs, TRUE, FALSE, NULL);
280 if (!win32_handler->event_handle) {
281 GST_WARNING ("Couldn't create event handle");
282 g_free (win32_handler);
283 win32_handler = NULL;
288 win32_handler->console_handle = GetStdHandle (STD_INPUT_HANDLE);
289 if (!win32_handler->console_handle) {
290 GST_WARNING ("Couldn't get console handle");
291 CloseHandle (win32_handler->event_handle);
292 g_free (win32_handler);
293 win32_handler = NULL;
298 g_mutex_init (&win32_handler->lock);
299 win32_handler->thread =
300 g_thread_new ("gst-play-kb", gst_play_kb_win32_thread, win32_handler);
303 kb_callback = kb_func;
304 kb_callback_data = user_data;
312 gst_play_kb_set_key_handler (GstPlayKbFunc key_func, gpointer user_data)
314 GST_FIXME ("Keyboard handling for this OS needs to be implemented");
318 #endif /* !G_OS_UNIX */