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Dynamic loading of the Dispmanx Grabber (#1440)

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* BCM dynamic loading

* cleanup

* better handle start of dispmanx

* set GrabberWrapper pointer to null on exit

* Update DispmanxFrameGrabber.cpp
This commit is contained in:
Markus
2022-03-20 14:42:21 +01:00
committed by GitHub
parent f32db90c12
commit addff6f7ef
16 changed files with 278 additions and 287 deletions
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201
libsrc/grabber/dispmanx/DispmanxFrameGrabber.cpp
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@@ -11,9 +11,8 @@
// Constants
namespace {
const bool verbose = false;
const int DEFAULT_DEVICE = 0;
const bool verbose = false;
const int DEFAULT_DEVICE = 0;
} //End of constants
// Local includes
@@ -21,24 +20,75 @@ const int DEFAULT_DEVICE = 0;
DispmanxFrameGrabber::DispmanxFrameGrabber()
: Grabber("DISPMANXGRABBER")
, _vc_display(0)
, _vc_resource(0)
, _vc_flags(DISPMANX_TRANSFORM_T(0))
, _captureBuffer(new ColorRgba[0])
, _captureBufferSize(0)
, _image_rgba()
, _lib(nullptr)
, _vc_display(0)
, _vc_resource(0)
, _vc_flags(DISPMANX_TRANSFORM_T(0))
, _captureBuffer(new ColorRgba[0])
, _captureBufferSize(0)
, _image_rgba()
{
_useImageResampler = true;
// Initialise BCM
bcm_host_init();
}
bool DispmanxFrameGrabber::isAvailable()
{
#ifdef BCM_FOUND
void* bcm_host = dlopen(std::string("" BCM_LIBRARY).c_str(), RTLD_LAZY | RTLD_GLOBAL);
if (bcm_host != nullptr)
{
dlclose(bcm_host);
return true;
}
return false;
#else
return false;
#endif
}
bool DispmanxFrameGrabber::open()
{
#ifdef BCM_FOUND
if (_lib != nullptr)
return true;
std::string library = std::string("" BCM_LIBRARY);
_lib = dlopen(library.c_str(), RTLD_LAZY | RTLD_GLOBAL);
if (!_lib)
{
DebugIf(verbose, _log, "dlopen for %s failed, error = %s", library.c_str(), dlerror());
return false;
}
dlerror(); /* Clear any existing error */
if (!(*(void**)(&wr_bcm_host_init) = dlsym(_lib,"bcm_host_init"))) goto dlError;
if (!(*(void**)(&wr_bcm_host_deinit) = dlsym(_lib,"bcm_host_deinit"))) goto dlError;
if (!(*(void**)(&wr_vc_dispmanx_display_close) = dlsym(_lib,"vc_dispmanx_display_close"))) goto dlError;
if (!(*(void**)(&wr_vc_dispmanx_display_open) = dlsym(_lib,"vc_dispmanx_display_open"))) goto dlError;
if (!(*(void**)(&wr_vc_dispmanx_display_get_info) = dlsym(_lib, "vc_dispmanx_display_get_info"))) goto dlError;
if (!(*(void**)(&wr_vc_dispmanx_resource_create) = dlsym(_lib,"vc_dispmanx_resource_create"))) goto dlError;
if (!(*(void**)(&wr_vc_dispmanx_resource_delete) = dlsym(_lib, "vc_dispmanx_resource_delete"))) goto dlError;
if (!(*(void**)(&wr_vc_dispmanx_resource_read_data) = dlsym(_lib, "vc_dispmanx_resource_read_data"))) goto dlError;
if (!(*(void**)(&wr_vc_dispmanx_rect_set) = dlsym(_lib, "vc_dispmanx_rect_set"))) goto dlError;
if (!(*(void**)(&wr_vc_dispmanx_snapshot) = dlsym(_lib, "vc_dispmanx_snapshot"))) goto dlError;
wr_bcm_host_init();
return true;
dlError:
DebugIf(verbose, _log, "dlsym for %s::%s failed, error = %s", library.c_str(), dlerror());
dlclose(_lib);
return false;
#else
return false;
#endif
}
DispmanxFrameGrabber::~DispmanxFrameGrabber()
{
freeResources();
// De-init BCM
bcm_host_deinit();
}
bool DispmanxFrameGrabber::setupScreen()
@@ -66,22 +116,32 @@ bool DispmanxFrameGrabber::setupScreen()
void DispmanxFrameGrabber::freeResources()
{
delete[] _captureBuffer;
// Clean up resources
vc_dispmanx_resource_delete(_vc_resource);
if (_lib != nullptr)
{
// Clean up resources
wr_vc_dispmanx_resource_delete(_vc_resource);
// De-init BCM
wr_bcm_host_deinit();
dlclose(_lib);
_lib = nullptr;
}
}
bool DispmanxFrameGrabber::setWidthHeight(int width, int height)
{
bool rc = false;
if(Grabber::setWidthHeight(width, height))
if(open() && Grabber::setWidthHeight(width, height))
{
if(_vc_resource != 0) {
vc_dispmanx_resource_delete(_vc_resource);
if(_vc_resource != 0)
{
wr_vc_dispmanx_resource_delete(_vc_resource);
}
Debug(_log,"Create the resources for capturing image");
uint32_t vc_nativeImageHandle;
_vc_resource = vc_dispmanx_resource_create(
_vc_resource = wr_vc_dispmanx_resource_create(
VC_IMAGE_RGBA32,
width,
height,
@@ -91,7 +151,7 @@ bool DispmanxFrameGrabber::setWidthHeight(int width, int height)
if (_vc_resource != 0)
{
Debug(_log,"Define the capture rectangle with the same size");
vc_dispmanx_rect_set(&_rectangle, 0, 0, width, height);
wr_vc_dispmanx_rect_set(&_rectangle, 0, 0, width, height);
rc = true;
}
}
@@ -137,7 +197,7 @@ int DispmanxFrameGrabber::grabFrame(Image<ColorRgb> & image)
}
// Open the connection to the display
_vc_display = vc_dispmanx_display_open(DEFAULT_DEVICE);
_vc_display = wr_vc_dispmanx_display_open(DEFAULT_DEVICE);
if (_vc_display < 0)
{
Error(_log, "Cannot open display: %d", DEFAULT_DEVICE);
@@ -146,7 +206,7 @@ int DispmanxFrameGrabber::grabFrame(Image<ColorRgb> & image)
else {
// Create the snapshot (incl down-scaling)
int ret = vc_dispmanx_snapshot(_vc_display, _vc_resource, _vc_flags);
int ret = wr_vc_dispmanx_snapshot(_vc_display, _vc_resource, _vc_flags);
if (ret < 0)
{
Error(_log, "Snapshot failed: %d", ret);
@@ -180,7 +240,7 @@ int DispmanxFrameGrabber::grabFrame(Image<ColorRgb> & image)
capturePtr = &_captureBuffer[0];
}
ret = vc_dispmanx_resource_read_data(_vc_resource, &_rectangle, capturePtr, capturePitch);
ret = wr_vc_dispmanx_resource_read_data(_vc_resource, &_rectangle, capturePtr, capturePitch);
if (ret < 0)
{
Error(_log, "vc_dispmanx_resource_read_data failed: %d", ret);
@@ -196,7 +256,8 @@ int DispmanxFrameGrabber::grabFrame(Image<ColorRgb> & image)
image);
}
}
vc_dispmanx_display_close(_vc_display);
wr_vc_dispmanx_display_close(_vc_display);
}
}
return rc;
@@ -207,12 +268,12 @@ QSize DispmanxFrameGrabber::getScreenSize(int device) const
int width (0);
int height(0);
DISPMANX_DISPLAY_HANDLE_T vc_display = vc_dispmanx_display_open(device);
DISPMANX_DISPLAY_HANDLE_T vc_display = wr_vc_dispmanx_display_open(device);
if ( vc_display > 0)
{
// Obtain the display information
DISPMANX_MODEINFO_T vc_info;
int result = vc_dispmanx_display_get_info(vc_display, &vc_info);
int result = wr_vc_dispmanx_display_get_info(vc_display, &vc_info);
(void)result;
if (result == 0)
@@ -223,7 +284,7 @@ QSize DispmanxFrameGrabber::getScreenSize(int device) const
DebugIf(verbose, _log, "Display found with resolution: %dx%d", width, height);
}
// Close the display
vc_dispmanx_display_close(vc_display);
wr_vc_dispmanx_display_close(vc_display);
}
return QSize(width, height);
@@ -234,61 +295,63 @@ QJsonObject DispmanxFrameGrabber::discover(const QJsonObject& params)
DebugIf(verbose, _log, "params: [%s]", QString(QJsonDocument(params).toJson(QJsonDocument::Compact)).toUtf8().constData());
QJsonObject inputsDiscovered;
int deviceIdx (DEFAULT_DEVICE);
QJsonArray video_inputs;
QSize screenSize = getScreenSize(deviceIdx);
if ( !screenSize.isEmpty() )
if (open())
{
QJsonArray fps = { 1, 5, 10, 15, 20, 25, 30, 40, 50, 60 };
int deviceIdx (DEFAULT_DEVICE);
QJsonArray video_inputs;
QJsonObject in;
QSize screenSize = getScreenSize(deviceIdx);
if ( !screenSize.isEmpty() )
{
QJsonArray fps = { 1, 5, 10, 15, 20, 25, 30, 40, 50, 60 };
QString displayName;
displayName = QString("Screen:%1").arg(deviceIdx);
QJsonObject in;
in["name"] = displayName;
in["inputIdx"] = deviceIdx;
QString displayName;
displayName = QString("Screen:%1").arg(deviceIdx);
QJsonArray formats;
QJsonObject format;
in["name"] = displayName;
in["inputIdx"] = deviceIdx;
QJsonArray resolutionArray;
QJsonArray formats;
QJsonObject format;
QJsonObject resolution;
QJsonArray resolutionArray;
resolution["width"] = screenSize.width();
resolution["height"] = screenSize.height();
resolution["fps"] = fps;
QJsonObject resolution;
resolutionArray.append(resolution);
resolution["width"] = screenSize.width();
resolution["height"] = screenSize.height();
resolution["fps"] = fps;
format["resolutions"] = resolutionArray;
formats.append(format);
resolutionArray.append(resolution);
in["formats"] = formats;
video_inputs.append(in);
}
format["resolutions"] = resolutionArray;
formats.append(format);
if (!video_inputs.isEmpty())
{
inputsDiscovered["device"] = "dispmanx";
inputsDiscovered["device_name"] = "DispmanX";
inputsDiscovered["type"] = "screen";
inputsDiscovered["video_inputs"] = video_inputs;
in["formats"] = formats;
video_inputs.append(in);
}
QJsonObject defaults, video_inputs_default, resolution_default;
resolution_default["fps"] = _fps;
video_inputs_default["resolution"] = resolution_default;
video_inputs_default["inputIdx"] = 0;
defaults["video_input"] = video_inputs_default;
inputsDiscovered["default"] = defaults;
}
if (!video_inputs.isEmpty())
{
inputsDiscovered["device"] = "dispmanx";
inputsDiscovered["device_name"] = "DispmanX";
inputsDiscovered["type"] = "screen";
inputsDiscovered["video_inputs"] = video_inputs;
if (inputsDiscovered.isEmpty())
{
DebugIf(verbose, _log, "No displays found to capture from!");
QJsonObject defaults, video_inputs_default, resolution_default;
resolution_default["fps"] = _fps;
video_inputs_default["resolution"] = resolution_default;
video_inputs_default["inputIdx"] = 0;
defaults["video_input"] = video_inputs_default;
inputsDiscovered["default"] = defaults;
}
if (inputsDiscovered.isEmpty())
{
DebugIf(verbose, _log, "No displays found to capture from!");
}
}
DebugIf(verbose, _log, "device: [%s]", QString(QJsonDocument(inputsDiscovered).toJson(QJsonDocument::Compact)).toUtf8().constData());