转成python
使用opencv 与gi 重写#
include "mp4_lib.h"
#
include <QtWidgets/QWidget>
#
include <sys/socket.h>
#
include <net
inet/
in.h>
#
include <arpa/
inet.h>
#
include <unistd.h>
#def
ine GST_WAYLAND_DISPLAY_HANDLE_CONTEXT_TYPE "GstWaylandDisplayHandleContextType"
struct wl_surface *surface = NULL;
struct wl_display *display = NULL;
static
int video_x = 100;
static
int video_y = 100;
static
int video_width = 300;
static
int video_height = 300;
static
const char *target_ip = "192.168.1.1";
static
int target_port =
554;
static bool wait_flag = 0;
Mp4_lib
::Mp4_lib
()
{
}
// 检查IP是否可达
bool check_ip_
reachability(const char *ip,
int port
) {
int sockfd = socket
(AF_
INET, SOCK_STREAM, 0
);
if
(sockfd < 0
) {
perror
("Socket creation error"
);
return false;
}
struct sockaddr_
in server_addr;
server_addr.s
in_family = AF_
INET;
server_addr.s
in_port = htons
(port
);
if
(inet_pton
(AF_
INET, ip, &server_addr.s
in_addr
) <= 0
) {
perror
("
Invalid address/ Address not supported"
);
close
(sockfd
);
return false;
}
if
(connect
(sockfd,
(struct sockaddr *)&server_addr, sizeof
(server_addr
)) < 0
) {
// 连接失败，IP可能不可达
close
(sockfd
);
return false;
}
// 连接成功，IP可达
close
(sockfd
);
return true;
}
void ma
in_loop
(void* widgetPtr,
int x,
int y,
int width,
int height
){
if
(x>0
){
video_x = x;
}
if
(y>0
){
video_y = y;
}
if
(width>0
){
video_width = width;
}
if
(height>0
){
video_height = height;
}
QWidget* w
indow = static_cast<QWidget *>
(widgetPtr
);
gst_
init
(NULL, NULL
);
// 测试视频
:
if
(!check_ip_
reachability(target_ip,target_port
)){
pr
intf
("RTSP URL FAIL\r\n"
);
wait_flag = 1;
return;
}else{
pr
intf
("RTSP URL SUCCESS\r\n"
);
}
GstElement *pipel
ine = gst_parse_launch
("rtspsrc location=rtsp
://192.168.3.168
:554/cvbs ! decodeb
in ! videoconvert ! waylands
ink sync=false ",NULL
);
//GstElement *pipel
ine = gst_parse_launch
("rtspsrc location=rtsp
://192.168.3.168
:554/cvbs ! rtpmp2tdepay ! aiurdemux ! name=d d. ! queue ! h264parse ! vpudec ! imxcompositor_g2d ! waylands
ink sync=false d. ! queue ! aacparse ! beepdec ",NULL
);
if
(!pipel
ine
){
pr
intf
("error!!1\r\n"
);
return;
}
//w
indow->show
();
GstBus *bus = gst_element_get_bus
(pipel
ine
);
gst_bus_add_watch
(bus, bus_watch_function, pipel
ine
);
gst_bus_set_sync_handler
(bus, bus_sync_handler, w
indow, nullptr
);
// 释放总线引用
gst_object_unref
(bus
);
//pr
intf
("123\r\n"
);
gst_element_set_state
(pipel
ine, GST_STATE_PLAY
ING
);
}
gboolean bus_watch_function
(GstBus *bus, GstMessage *msg, gpo
inter data
) {
GstElement *pipel
ine =
(GstElement
*)data;
if
(!check_ip_
reachability(target_ip,target_port
)){
pr
intf
("play
ing RTSP URL FAIL\r\n"
);
gst_element_set_state
(pipel
ine, GST_STATE_NULL
);
//gst_object_unref
(pipel
ine
);
return TRUE;
}
//pr
intf
("pipel
ine2 %p\r\n",pipel
ine
);
switch
(GST_MESSAGE_TYPE
(msg
)) {
case GST_MESSAGE_EOS
:
// 播放结束
gst_element_set_state
(pipel
ine, GST_STATE_NULL
);
gst_object_unref
(pipel
ine
);
break;
case GST_MESSAGE_ERROR
: {
// 发生错误
GError *err;
gchar *debug_
info;
gst_message_parse_error
(msg, &err, &debug_
info
);
g_pr
interr
("Error received from element %s
: %s\n", GST_OBJECT_NAME
(msg->src
), err->message
);
g_pr
interr
("Debugg
ing
information
: %s\n", debug_
info ? debug_
info
: "none"
);
g_clear_error
(&err
);
g_free
(debug_
info
);
gst_element_set_state
(pipel
ine, GST_STATE_NULL
);
gst_object_unref
(pipel
ine
);
break;
}
default
:
break;
}
return TRUE;
}
gboolean gst_is_wayland_display_handle_need_context_message
(GstMessage *msg
) {
const gchar *type = NULL;
g_return_val_if_fail
(GST_IS_MESSAGE
(msg
), FALSE
);
if
(GST_MESSAGE_TYPE
(msg
) == GST_MESSAGE_NEED_CONTEXT && gst_message_parse_context_type
(msg, &type
)) {
return !g_strcmp0
(type, GST_WAYLAND_DISPLAY_HANDLE_CONTEXT_TYPE
);
}
return FALSE;
}
GstContext *gst_wayland_display_handle_context_new
(struct wl_display *display
) {
GstContext *context = gst_context_new
(GST_WAYLAND_DISPLAY_HANDLE_CONTEXT_TYPE, TRUE
);
gst_
structure_set
(gst_context_writable_
structure
(context
), "handle", G_TYPE_PO
INTER, display, NULL
);
return context;
}
GstBusSyncReply bus_sync_handler
(GstBus *bus, GstMessage *msg, gpo
inter data
) {
QWidget *w
indow =
(QWidget
*)data;
if
(gst_is_wayland_display_handle_need_context_message
(msg
)) {
g_pr
int
("gst_is_wayland_display_handle_need_context_message\n"
);
GstContext *context;
// get the wlayland display handle from Qt
QPlatformNative
Interface *native = QGuiApplication
::platformNative
Interface
();
display = static_cast<
struct wl_display *>
(native->nativeResourceForW
indow
("display", NULL
));
g_pr
int
("display
: %p\n", display
);
context = gst_wayland_display_handle_context_new
(display
);
gst_element_set_context
(GST_ELEMENT
(GST_MESSAGE_SRC
(msg
)), context
);
goto drop;
} else if
(gst_is_video_overlay_prepare_w
indow_handle_message
(msg
)) {
wait_flag = 1;
g_pr
int
("gst_is_video_overlay_prepare_w
indow_handle_message\n"
);
// we can only get the handle for the top w
indow
// the handle for videoW
indow will be null !!
QPlatformNative
Interface *native = QGuiApplication
::platformNative
Interface
();
QW
indow *w
indowHandle = w
indow->w
indowHandle
();
g_pr
int
("top w
indow handle
: %p\n", w
indowHandle
);
surface = static_cast<
struct wl_surface *>
(native->nativeResourceForW
indow
("surface", w
indowHandle
));
g_pr
int
("surface
: %p\n", surface
);
gst_video_overlay_set_w
indow_handle
(GST_VIDEO_OVERLAY
(GST_MESSAGE_SRC
(msg
)),
(gu
intptr
)surface
);
//QRect re = w
indow->frameGeometry
();
//g_pr
int
("w
indow rect x
: %d, y
:%d, w
:%d, h
:%d\n", re.x
(), re.y
(), re.width
(), re.height
());
//QRect vre = w
indow->geometry
();
g_pr
int
("video w
indow rect x
: %d, y
:%d, w
: %d, h
: %d \n", video_x, video_y, video_width, video_height
);
gst_video_overlay_set_render_rectangle
(GST_VIDEO_OVERLAY
(GST_MESSAGE_SRC
(msg
)),
video_x, video_y, video_width, video_height
);
goto drop;
}
return GST_BUS_PASS;
drop
:
gst_message_unref
(msg
);
return GST_BUS_DROP;
}
void helloworld
(){
pr
intf
("helloworld \r\n"
);
}
bool wait_video_start
(){
return wait_flag;
}
本文介绍在iOS 5中使用苹果官方Reachability库时遇到的一个警告问题及其解决方案。当开发者尝试使用reachabilityWithAddress方法时，会收到关于'struct sockaddr_in'可见性的警告。文中提供了一个简单的解决办法，即在Reachability.h文件头部导入<netinet/in.h>头文件。
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