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

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+/* This file is part of the Pangolin Project.
+ * http://github.com/stevenlovegrove/Pangolin
+ *
+ * Copyright (c) 2014 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 <iomanip>
+#include <pangolin/factory/factory_registry.h>
+#include <pangolin/image/image_io.h>
+#include <pangolin/utils/file_utils.h>
+#include <pangolin/video/drivers/images_out.h>
+
+namespace pangolin {
+
+ImagesVideoOutput::ImagesVideoOutput(const std::string& image_folder, const std::string& json_file_out, const std::string& image_file_extension)
+    : json_frames(picojson::array_type,true),
+      image_index(0), image_folder( PathExpand(image_folder) + "/" ), image_file_extension(image_file_extension)
+{
+    if(!json_file_out.empty()) {
+        file.open(json_file_out);
+        if(!file.is_open()) {
+            throw std::runtime_error("Unable to open json file for writing, " + json_file_out + ". Make sure output folder already exists.");
+        }
+    }
+}
+
+ImagesVideoOutput::~ImagesVideoOutput()
+{
+    if(file.is_open())
+    {
+        const std::string video_uri = "images://" + image_folder + "archive.json";
+        picojson::value json_file;
+        json_file["device_properties"] = device_properties;
+        json_file["frames"] = json_frames;
+        json_file["input_uri"] = input_uri;
+        json_file["video_uri"] = video_uri;
+
+        // Serialize json to file.
+        file << json_file.serialize(true);
+    }
+}
+
+const std::vector<StreamInfo>& ImagesVideoOutput::Streams() const
+{
+    return streams;
+}
+
+void ImagesVideoOutput::SetStreams(const std::vector<StreamInfo>& streams, const std::string& uri, const picojson::value& device_properties)
+{
+    this->streams = streams;
+    this->input_uri = uri;
+    this->device_properties = device_properties;
+}
+
+int ImagesVideoOutput::WriteStreams(const unsigned char* data, const picojson::value& frame_properties)
+{
+    picojson::value json_filenames(picojson::array_type, true);
+
+    // Write each stream image to file.
+    for(size_t s=0; s < streams.size(); ++s) {
+        const pangolin::StreamInfo& si = streams[s];
+        const std::string filename = pangolin::FormatString("image_%%%_%.%",std::setfill('0'),std::setw(10),image_index, s, image_file_extension);
+        json_filenames.push_back(filename);
+        const Image<unsigned char> img = si.StreamImage(data);
+        pangolin::SaveImage(img, si.PixFormat(), image_folder + filename);
+    }
+
+    // Add frame_properties to json file.
+    picojson::value json_frame;
+    json_frame["frame_properties"] = frame_properties;
+    json_frame["stream_files"] = json_filenames;
+    json_frames.push_back(json_frame);
+
+    ++image_index;
+    return 0;
+}
+
+bool ImagesVideoOutput::IsPipe() const
+{
+    return false;
+}
+
+PANGOLIN_REGISTER_FACTORY(ImagesVideoOutput)
+{
+    struct ImagesVideoFactory final : public FactoryInterface<VideoOutputInterface> {
+        std::unique_ptr<VideoOutputInterface> Open(const Uri& uri) override {
+            const std::string images_folder = PathExpand(uri.url);
+            const std::string json_filename = images_folder + "/archive.json";
+            const std::string image_extension = uri.Get<std::string>("fmt", "png");
+
+            if(FileExists(json_filename)) {
+                throw std::runtime_error("Dataset already exists in directory.");
+            }
+
+            return std::unique_ptr<VideoOutputInterface>(
+                new ImagesVideoOutput(images_folder, json_filename, image_extension)
+            );
+        }
+    };
+
+    auto factory = std::make_shared<ImagesVideoFactory>();
+    FactoryRegistry<VideoOutputInterface>::I().RegisterFactory(factory, 10, "images");
+}
+
+}