gstreamer/tests/examples/d3d11videosink/d3d11videosink-kb.c

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/* 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 "d3d11videosink-kb.h"
#include <stdlib.h>
#include <stdio.h>
#include <string.h>
#include <windows.h>
#include <io.h>
#include <gst/gst.h>
/* This is all not thread-safe, but doesn't have to be really */
static GstD3D11VideoSinkKbFunc kb_callback;
static gpointer kb_callback_data;
typedef struct
{
GThread *thread;
HANDLE event_handle;
HANDLE console_handle;
gboolean closing;
GMutex lock;
} Win32KeyHandler;
static Win32KeyHandler *win32_handler = NULL;
static gboolean
gst_d3d11_video_sink_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) {
if (buffer.Event.KeyEvent.wVirtualKeyCode == VK_SPACE) {
kb_callback (' ', kb_callback_data);
} else {
kb_callback (buffer.Event.KeyEvent.uChar.AsciiChar, kb_callback_data);
}
}
}
return G_SOURCE_REMOVE;
}
static gpointer
gst_d3d11_video_sink_kb_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_d3d11_video_sink_source_cb, handler);
}
return NULL;
}
gboolean
gst_d3d11_video_sink_kb_set_key_handler (GstD3D11VideoSinkKbFunc 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) {
g_warning ("Couldn't create event handle\n");
g_free (win32_handler);
win32_handler = NULL;
return FALSE;
}
win32_handler->console_handle = GetStdHandle (STD_INPUT_HANDLE);
if (!win32_handler->console_handle) {
g_warning ("Couldn't get console handle\n");
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_d3d11_video_sink_kb_thread,
win32_handler);
}
kb_callback = kb_func;
kb_callback_data = user_data;
return TRUE;
}