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SimpleSkyCam
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Tried to improve VfW interface, though no video data yet :(

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master
Stefan Jahn 3 years ago
parent f47074adfb
commit 245c9f582a
2 changed files with 102 additions and 24 deletions
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122
videodev-vfw.cc
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@ -23,7 +23,7 @@ VideoDev_VFW::VideoDev_VFW() {
VideoDev_VFW::~VideoDev_VFW() {
printf ("%s:%d %s\n", __FILE__, __LINE__, __FUNCTION__);
// if (running > 0) CaptureStop();
if (running > 0) CaptureStop();
}
/*
@ -40,8 +40,7 @@ int VideoDev_VFW::GetDeviceList(std::list<std::string> *list) {
for(int i=0; i < 10; i++)
if(capGetDriverDescription(i, name, sizeof(name), desc, sizeof(desc))) {
std::string device;
device = "VFW " + to_string(i) + " " + (string)name + " [" + (string)desc + "]";
device = "VfW " + to_string(i) + " " + (string)name + " [" + (string)desc + "]";
list->push_back(device);
}
@ -58,34 +57,61 @@ int VideoDev_VFW::Open() {
printf ("%s:%d %s\n", __FILE__, __LINE__, __FUNCTION__);
camid = atoi (conf_device.c_str());
printf ("%s:%d %s opening vfw id %d\n", __FILE__, __LINE__, __FUNCTION__, camid);
printf ("%s:%d %s Opening VfW id %d\n", __FILE__, __LINE__, __FUNCTION__, camid);
cap = capCreateCaptureWindow("VfW", /*WS_CHILD|WS_VISIBLE*/0, 0, 0, 0, 0, 0/*HWND_MESSAGE*/, camid);
if(!cap) {
printf ("%s:%d %s Could not open VfW id %d window\n", __FILE__, __LINE__, __FUNCTION__, camid);
return VDEV_STATUS_ERROR;
}
cap = capCreateCaptureWindow("VFW", WS_CHILD, 0, 0, 0, 0, HWND_MESSAGE, camid);
if(!capDriverConnect(cap, 0)) {
printf ("%s:%d %s could not connect to vfw id %d\n", __FILE__, __LINE__, __FUNCTION__, camid);
if(!capDriverConnect(cap, camid)) {
printf ("%s:%d %s Could not connect to VfW id %d\n", __FILE__, __LINE__, __FUNCTION__, camid);
return VDEV_STATUS_ERROR;
}
capDlgVideoFormat(cap);
// get current valid width/height
BITMAPINFO bi;
int w, h, i = 0;
capGetVideoFormat(cap, &bi, sizeof(BITMAPINFO));
conf_width = bi.bmiHeader.biWidth;
conf_height = bi.bmiHeader.biHeight;
printf ("%s:%d %s current size %dx%d\n", __FILE__, __LINE__, __FUNCTION__, conf_width, conf_height);
conf_format = convert_from_pixelformat(bi.bmiHeader.biCompression);
printf ("%s:%d %s current format %s\n", __FILE__, __LINE__, __FUNCTION__, conf_format.c_str());
switch(bi.bmiHeader.biCompression) {
case MAKEFOURCC('M','J','P','G'):
inframe_pixfmt = V4L2_PIX_FMT_MJPEG;
break;
case MAKEFOURCC('Y','U','Y','2'):
inframe_pixfmt = V4L2_PIX_FMT_YUYV;
break;
w = bi.bmiHeader.biWidth;
h = bi.bmiHeader.biHeight;
printf ("%s:%d %s Current capture size is %dx%d\n", __FILE__, __LINE__, __FUNCTION__, w, h);
inframe_pixfmt = convert_to_pixelformat(conf_format);
// try to set the configured width/height
if(conf_width != -1) {
bi.bmiHeader.biWidth = conf_width;
bi.bmiHeader.biHeight = conf_height;
bi.bmiHeader.biCompression = inframe_pixfmt;
if(!capSetVideoFormat(cap, &bi, sizeof(BITMAPINFO))) {
printf ("%s:%d %s Could not set capture size %dx%d (%s)\n", __FILE__, __LINE__, __FUNCTION__, conf_width, conf_height, conf_format.c_str());
return VDEV_STATUS_ERROR;
}
}
// find out maximum resolution
else {
int sizes[][2] = {{320, 240}, {640, 480}, {800, 600}, {1024, 768}, {1280, 1024}, {1920, 1080}, {-1, -1}};
while(sizes[i][0] != -1) {
w = bi.bmiHeader.biWidth = sizes[i][0];
h = bi.bmiHeader.biHeight = sizes[i][1];
bi.bmiHeader.biCompression = inframe_pixfmt;
if(capSetVideoFormat(cap, &bi, sizeof(BITMAPINFO))) {
printf ("%s:%d %s Resolution %dx%d (%s) works\n", __FILE__, __LINE__, __FUNCTION__, w, h, conf_format.c_str());
if (w >= conf_width && h >= conf_height) {
conf_width = w;
conf_height = h;
}
}
i++;
}
}
printf ("%s:%d %s Current capture format is %s\n", __FILE__, __LINE__, __FUNCTION__, conf_format.c_str());
return VDEV_STATUS_OK;
};
@ -119,6 +145,7 @@ LRESULT CALLBACK VFW_frame_callback(HWND h, LPVIDEOHDR v) {
LRESULT VFW_error_callback(HWND h, int nID, LPCSTR lpsz) {
printf("error callback: %d (%s)\n", nID, lpsz);
return TRUE;
}
/*
@ -130,10 +157,12 @@ int VideoDev_VFW::CaptureStart() {
printf ("%s:%d %s\n", __FILE__, __LINE__, __FUNCTION__);
capSetCallbackOnError(cap, VFW_error_callback);
if(!capSetCallbackOnError(cap, VFW_error_callback)) {
printf ("%s:%d %s Could not set error callback to VfW id %d\n", __FILE__, __LINE__, __FUNCTION__, camid);
}
if(!capSetCallbackOnFrame(cap, VFW_frame_callback)) {
printf ("%s:%d %s could not set callback to vfw id %d\n", __FILE__, __LINE__, __FUNCTION__, camid);
printf ("%s:%d %s Could not set frame callback to VfW id %d\n", __FILE__, __LINE__, __FUNCTION__, camid);
}
ConvertStart(&cdata, inframe_pixfmt);
@ -150,6 +179,7 @@ int VideoDev_VFW::CaptureStop() {
printf ("%s:%d %s\n", __FILE__, __LINE__, __FUNCTION__);
capCaptureAbort(cap);
capSetCallbackOnError(cap, NULL);
capSetCallbackOnFrame(cap, NULL);
ConvertStop(&cdata, inframe_pixfmt);
return VDEV_STATUS_OK;
@ -176,6 +206,52 @@ int VideoDev_VFW::Grab(VideoFrame *vf) {
int VideoDev_VFW::GetDeviceFormats(string device, std::list<string> *formats) {
printf ("%s:%d %s\n", __FILE__, __LINE__, __FUNCTION__);
camid = atoi (conf_device.c_str());
cap = capCreateCaptureWindow("VfW", /*WS_CHILD|WS_VISIBLE*/0, 0, 0, 0, 0, 0/*HWND_MESSAGE*/, camid);
if(!cap) {
printf ("%s:%d %s Could not open VfW id %d window\n", __FILE__, __LINE__, __FUNCTION__, camid);
return VDEV_STATUS_ERROR;
}
if(!capDriverConnect(cap, camid)) {
printf ("%s:%d %s Could not connect to VfW id %d\n", __FILE__, __LINE__, __FUNCTION__, camid);
return VDEV_STATUS_ERROR;
}
BITMAPINFO bi;
capGetVideoFormat(cap, &bi, sizeof(BITMAPINFO));
string vfwformat;
DWORD f = bi.bmiHeader.biCompression;
vfwformat = convert_from_pixelformat(f);
printf ("%s:%d %s Current capture format is %s\n", __FILE__, __LINE__, __FUNCTION__, vfwformat.c_str());
formats->push_back(vfwformat);
#if 0
int i = 0;
DWORD vfwformats[][2] = {{MAKEFOURCC('M','J','P','G'), V4L2_PIX_FMT_MJPEG},
{MAKEFOURCC('Y','U','V','2'), V4L2_PIX_FMT_YUV2},
{0, 0}};
while(vfwformats[i][0] != 0) {
bi.bmiHeader.biCompression = vfwformats[i][0];
if(capSetVideoFormat(cap, &bi, sizeof(BITMAPINFO))) {
vfwformat = convert_from_pixelformat(vfwformats[i][1]);
printf ("%s:%d %s Capture format %s works\n", __FILE__, __LINE__, __FUNCTION__, vfwformat.c_str());
formats->push_back(vfwformat.c_str());
}
else {
vfwformat = convert_from_pixelformat(vfwformats[i][1]);
printf ("%s:%d %s Capture format %s does not work\n", __FILE__, __LINE__, __FUNCTION__, vfwformat.c_str());
}
i++;
}
#endif
capDriverDisconnect(cap);
cap = NULL;
camid = -1;
return VDEV_STATUS_OK;
}

2
windows.h
Unescape View File

@ -66,6 +66,8 @@ extern void strfromd (char* dest, int len, char *fmt,...);
#define V4L2_PIX_FMT_SGBRG16 v4l2_fourcc('G', 'B', '1', '6') /* 16 GBGB.. RGRG.. */
#define V4L2_PIX_FMT_SGBRG8 v4l2_fourcc('G', 'B', 'R', 'G') /* 8 GBGB.. RGRG.. */
#define V4L2_PIX_FMT_YUV2 v4l2_fourcc('Y', 'U', 'V', '2') /* ??? */
#define v4l2_fourcc(a, b, c, d)\
((__u32)(a) | ((__u32)(b) << 8) | ((__u32)(c) << 16) | ((__u32)(d) << 24))
#define v4l2_fourcc_be(a, b, c, d) (v4l2_fourcc(a, b, c, d) | (1U << 31))

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