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142 lines
3.7 KiB
C
142 lines
3.7 KiB
C
/* GStreamer command line playback testing utility - keyboard handling helpers
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*
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* Copyright (C) 2013 Tim-Philipp Müller <tim centricular net>
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* Copyright (C) 2013 Centricular Ltd
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*
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* This library is free software; you can redistribute it and/or
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* modify it under the terms of the GNU Library General Public
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* License as published by the Free Software Foundation; either
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* version 2 of the License, or (at your option) any later version.
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*
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* This library is distributed in the hope that it will be useful,
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* but WITHOUT ANY WARRANTY; without even the implied warranty of
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
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* Library General Public License for more details.
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*
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* You should have received a copy of the GNU Library General Public
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* License along with this library; if not, write to the
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* Free Software Foundation, Inc., 51 Franklin St, Fifth Floor,
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* Boston, MA 02110-1301, USA.
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*/
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#ifdef HAVE_CONFIG_H
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#include "config.h"
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#endif
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#include "gst-play-kb.h"
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#include <stdlib.h>
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#include <stdio.h>
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#include <string.h>
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#ifdef G_OS_UNIX
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#include <unistd.h>
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#include <termios.h>
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#endif
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#include <gst/gst.h>
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/* This is all not thread-safe, but doesn't have to be really */
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#ifdef G_OS_UNIX
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static struct termios term_settings;
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static gboolean term_settings_saved = FALSE;
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static GstPlayKbFunc kb_callback;
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static gpointer kb_callback_data;
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static gulong io_watch_id;
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static gboolean
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gst_play_kb_io_cb (GIOChannel * ioc, GIOCondition cond, gpointer user_data)
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{
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GIOStatus status;
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if (cond & G_IO_IN) {
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gchar buf[16] = { 0, };
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gsize read;
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status = g_io_channel_read_chars (ioc, buf, sizeof (buf) - 1, &read, NULL);
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if (status == G_IO_STATUS_ERROR)
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return FALSE;
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if (status == G_IO_STATUS_NORMAL) {
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if (kb_callback)
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kb_callback (buf, kb_callback_data);
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}
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}
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return TRUE; /* call us again */
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}
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gboolean
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gst_play_kb_set_key_handler (GstPlayKbFunc kb_func, gpointer user_data)
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{
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GIOChannel *ioc;
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int flags;
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if (!isatty (STDIN_FILENO)) {
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GST_INFO ("stdin is not connected to a terminal");
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return FALSE;
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}
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if (io_watch_id > 0) {
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g_source_remove (io_watch_id);
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io_watch_id = 0;
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}
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if (kb_func == NULL && term_settings_saved) {
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/* restore terminal settings */
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if (tcsetattr (STDIN_FILENO, TCSAFLUSH, &term_settings) == 0)
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term_settings_saved = FALSE;
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else
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g_warning ("could not restore terminal attributes");
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setvbuf (stdin, NULL, _IOLBF, 0);
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}
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if (kb_func != NULL) {
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struct termios new_settings;
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if (!term_settings_saved) {
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if (tcgetattr (STDIN_FILENO, &term_settings) != 0) {
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g_warning ("could not save terminal attributes");
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return FALSE;
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}
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term_settings_saved = TRUE;
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/* Echo off, canonical mode off, extended input processing off */
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new_settings = term_settings;
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new_settings.c_lflag &= ~(ECHO | ICANON | IEXTEN);
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if (tcsetattr (STDIN_FILENO, TCSAFLUSH, &new_settings) != 0) {
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g_warning ("Could not set terminal state");
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return FALSE;
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}
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setvbuf (stdin, NULL, _IONBF, 0);
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}
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}
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ioc = g_io_channel_unix_new (STDIN_FILENO);
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/* make non-blocking */
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flags = g_io_channel_get_flags (ioc);
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g_io_channel_set_flags (ioc, flags | G_IO_FLAG_NONBLOCK, NULL);
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io_watch_id = g_io_add_watch_full (ioc, G_PRIORITY_DEFAULT, G_IO_IN,
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(GIOFunc) gst_play_kb_io_cb, user_data, NULL);
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g_io_channel_unref (ioc);
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kb_callback = kb_func;
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kb_callback_data = user_data;
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return TRUE;
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}
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#else /* !G_OS_UNIX */
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gboolean
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gst_play_kb_set_key_handler (GstPlayKbFunc key_func, gpointer user_data)
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{
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GST_FIXME ("Keyboard handling for this OS needs to be implemented");
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}
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#endif /* !G_OS_UNIX */
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