| /* 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 "gst-play-kb.h" |
| |
| #include <stdlib.h> |
| #include <stdio.h> |
| #include <string.h> |
| |
| #ifdef G_OS_UNIX |
| #include <unistd.h> |
| #include <termios.h> |
| #endif |
| |
| #include <gst/gst.h> |
| |
| /* This is all not thread-safe, but doesn't have to be really */ |
| |
| #ifdef G_OS_UNIX |
| |
| static struct termios term_settings; |
| static gboolean term_settings_saved = FALSE; |
| static GstPlayKbFunc kb_callback; |
| static gpointer kb_callback_data; |
| 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; |
| int flags; |
| |
| 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); |
| |
| 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); |
| |
| /* make non-blocking */ |
| flags = g_io_channel_get_flags (ioc); |
| g_io_channel_set_flags (ioc, flags | G_IO_FLAG_NONBLOCK, NULL); |
| |
| 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; |
| } |
| |
| #else /* !G_OS_UNIX */ |
| |
| 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 */ |