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driver_api_stereo_multi sample reworked to use parallel_for_ instead of parallel_do

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This commit is contained in:
Alexander Smorkalov
2015-01-13 13:00:06 +03:00
parent 72063bf136
commit c0d76ef984
1 changed files with 23 additions and 32 deletions
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55
samples/gpu/driver_api_stereo_multi.cpp
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@@ -13,25 +13,12 @@
#include "opencv2/highgui/highgui.hpp"
#include "opencv2/gpu/gpu.hpp"
#if !defined(HAVE_CUDA) || !defined(HAVE_TBB) || defined(__arm__)
#if defined(__arm__)
int main()
{
#if !defined(HAVE_CUDA)
std::cout << "CUDA support is required (CMake key 'WITH_CUDA' must be true).\n";
#endif
#if !defined(HAVE_TBB)
std::cout << "TBB support is required (CMake key 'WITH_TBB' must be true).\n";
#endif
#if defined(__arm__)
std::cout << "Unsupported for ARM CUDA library." << std::endl;
#endif
return 0;
}
#else
#include <cuda.h>
@@ -42,7 +29,6 @@ using namespace std;
using namespace cv;
using namespace cv::gpu;
struct Worker { void operator()(int device_id) const; };
void destroyContexts();
#define safeCall(expr) safeCall_(expr, #expr, __FILE__, __LINE__)
@@ -77,6 +63,27 @@ GpuMat d_right[2];
StereoBM_GPU* bm[2];
GpuMat d_result[2];
struct Worker: public ParallelLoopBody
{
virtual void operator() (const Range& range) const
{
for (int device_id = range.start; device_id != range.end; ++device_id)
{
contextOn(device_id);
bm[device_id]->operator()(d_left[device_id], d_right[device_id],
d_result[device_id]);
std::cout << "GPU #" << device_id << " (" << DeviceInfo().name()
<< "): finished\n";
contextOff();
}
}
};
static void printHelp()
{
std::cout << "Usage: driver_api_stereo_multi_gpu --left <left_image> --right <right_image>\n";
@@ -162,8 +169,7 @@ int main(int argc, char** argv)
contextOff();
// Execute calculation in two threads using two GPUs
int devices[] = {0, 1};
parallel_do(devices, devices + 2, Worker());
parallel_for_(cv::Range(0, 2, Worker());
// Release the first GPU resources
contextOn(0);
@@ -188,21 +194,6 @@ int main(int argc, char** argv)
return 0;
}
void Worker::operator()(int device_id) const
{
contextOn(device_id);
bm[device_id]->operator()(d_left[device_id], d_right[device_id],
d_result[device_id]);
std::cout << "GPU #" << device_id << " (" << DeviceInfo().name()
<< "): finished\n";
contextOff();
}
void destroyContexts()
{
safeCall(cuCtxDestroy(contexts[0]));