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scene-split/input.cpp at master · riverlight/scene-split · GitHub
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#
include
"
input.h
"
CInput::CInput
()
{
_url =
NULL
;
_timestamp_ms = -
1
;
_width =
0
, _height =
0
;
}
CInput::~CInput
()
{
}
CInputVideo::CInputVideo
()
{
_timestamp_ms = -
1
;
_bLoops =
0
;
_nDuration_ms = -
1
;
}
CInputVideo::~CInputVideo
()
{
}
int
CInputVideo::Open
(
char
*url)
{
_url = url;
if
(_url ==
NULL
)
return
-
1
;
_cap.
open
(_url);
if
(!_cap.
isOpened
())
{
cout <<
"
video file [
"
<< _url <<
"
] open failed!
"
<< endl;
return
-
1
;
}
float
fps = _cap.
get
(
CV_CAP_PROP_FPS
);
float
framenum = _cap.
get
(
CV_CAP_PROP_FRAME_COUNT
);
if
(fps <=
0
)
return
-
1
;
_nDuration_ms = (framenum / fps) *
1000
;
//
cout << "video duration : " << _nDuration_ms << endl;
_nBaseTimestamp_ms =
0
;
_width =
int
(_cap.
get
(
CV_CAP_PROP_FRAME_WIDTH
));
_height =
int
(_cap.
get
(
CV_CAP_PROP_FRAME_HEIGHT
));
return
0
;
}
int
CInputVideo::Open
(
char
*url,
int
bLoops)
{
_bLoops = bLoops;
return
Open
(url);
}
int
CInputVideo::Get_FirstFrame
(Mat &firstImg)
{
if
(!_matFirst.
empty
())
{
firstImg = _matFirst;
return
0
;
}
VideoCapture
cap
(_url);
if
(!cap.
isOpened
())
return
-
1
;
cap >> _matFirst;
firstImg = _matFirst;
return
0
;
}
int
CInputVideo::Get_Duration
()
{
return
_nDuration_ms;
}
float
CInputVideo::Get_FrameRate
()
{
return
_cap.
get
(
CV_CAP_PROP_FPS
);
}
int
CInputVideo::Close
()
{
return
0
;
}
int
CInputVideo::Get_CurrentMat
(Mat &img,
int
startTime,
int
endTime,
int
currentTime)
{
int
hopeTimestamp_ms = currentTime - startTime - _nBaseTimestamp_ms;
if
(hopeTimestamp_ms<
0
)
return
-
1
;
while
(
1
)
{
if
(_timestamp_ms >= hopeTimestamp_ms)
{
if
(_matCurrent.
empty
())
{
cout <<
"
video _matCurrent is emtpy
"
<< endl;
return
-
1
;
}
img = _matCurrent;
//
cout << _timestamp_ms << endl;
break
;
}
else
{
_timestamp_ms = _cap.
get
(
CV_CAP_PROP_POS_MSEC
);
_cap >> _matCurrent;
if
(_matCurrent.
empty
())
{
if
(_timestamp_ms <
0
|| _bLoops ==
0
)
return
-
1
;
//
loops == 1
_nBaseTimestamp_ms += (_timestamp_ms +
1
);
hopeTimestamp_ms = currentTime - startTime - _nBaseTimestamp_ms;
_timestamp_ms = -
1
;
//
_cap.open(_url);
_cap.
set
(
CV_CAP_PROP_POS_MSEC
,
0
);
_timestamp_ms = _cap.
get
(
CV_CAP_PROP_POS_MSEC
);
_cap >> _matCurrent;
continue
;
}
}
}
return
0
;
}
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