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Thirdparty/Pangolin/src/video/drivers/test.cpp

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+/* This file is part of the Pangolin Project.
+ * http://github.com/stevenlovegrove/Pangolin
+ *
+ * Copyright (c) 2013 Steven Lovegrove
+ *
+ * Permission is hereby granted, free of charge, to any person
+ * obtaining a copy of this software and associated documentation
+ * files (the "Software"), to deal in the Software without
+ * restriction, including without limitation the rights to use,
+ * copy, modify, merge, publish, distribute, sublicense, and/or sell
+ * copies of the Software, and to permit persons to whom the
+ * Software is furnished to do so, subject to the following
+ * conditions:
+ *
+ * The above copyright notice and this permission notice shall be
+ * included in all copies or substantial portions of the Software.
+ *
+ * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND,
+ * EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES
+ * OF MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND
+ * NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT
+ * HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY,
+ * WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING
+ * FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR
+ * OTHER DEALINGS IN THE SOFTWARE.
+ */
+
+#include <pangolin/video/drivers/test.h>
+#include <pangolin/factory/factory_registry.h>
+#include <pangolin/video/iostream_operators.h>
+
+namespace pangolin
+{
+
+void setRandomData(unsigned char * arr, size_t size){
+  for(size_t i = 0 ; i < size;i++) {
+//      arr[i] = (unsigned char)(i * 255.0 / size);
+      arr[i] = (unsigned char)(rand()/(RAND_MAX/255.0));
+  }
+}
+
+TestVideo::TestVideo(size_t w, size_t h, size_t n, std::string pix_fmt)
+{
+    const PixelFormat pfmt = PixelFormatFromString(pix_fmt);
+
+    size_bytes = 0;
+
+    for(size_t c=0; c < n; ++c) {
+        const StreamInfo stream_info(pfmt, w, h, (w*pfmt.bpp)/8, 0);
+        streams.push_back(stream_info);
+        size_bytes += w*h*(pfmt.bpp)/8;
+    }
+}
+
+TestVideo::~TestVideo()
+{
+
+}
+
+//! Implement VideoInput::Start()
+void TestVideo::Start()
+{
+
+}
+
+//! Implement VideoInput::Stop()
+void TestVideo::Stop()
+{
+
+}
+
+//! Implement VideoInput::SizeBytes()
+size_t TestVideo::SizeBytes() const
+{
+    return size_bytes;
+}
+
+//! Implement VideoInput::Streams()
+const std::vector<StreamInfo>& TestVideo::Streams() const
+{
+    return streams;
+}
+
+//! Implement VideoInput::GrabNext()
+bool TestVideo::GrabNext( unsigned char* image, bool /*wait*/ )
+{
+    setRandomData(image, size_bytes);
+    return true;
+}
+
+//! Implement VideoInput::GrabNewest()
+bool TestVideo::GrabNewest( unsigned char* image, bool wait )
+{
+    return GrabNext(image,wait);
+}
+
+PANGOLIN_REGISTER_FACTORY(TestVideo)
+{
+    struct TestVideoFactory final : public FactoryInterface<VideoInterface> {
+        std::unique_ptr<VideoInterface> Open(const Uri& uri) override {
+            const ImageDim dim = uri.Get<ImageDim>("size", ImageDim(640,480));
+            const int n = uri.Get<int>("n", 1);
+            std::string fmt  = uri.Get<std::string>("fmt","RGB24");
+            return std::unique_ptr<VideoInterface>(new TestVideo(dim.x,dim.y,n,fmt));
+        }
+    };
+
+    FactoryRegistry<VideoInterface>::I().RegisterFactory(std::make_shared<TestVideoFactory>(), 10, "test");
+}
+
+}