Method load_json

src/ChunkReader.cpp:49–117

Load JSON meta data about this chunk folder

// Load JSON meta data about this chunk folder
void ChunkReader::load_json()
{
	// Load path of chunk folder
	std::string json_path = QDir::cleanPath(QString(path.c_str()) + QDir::separator() + "info.json").toStdString();
	std::stringstream json_string;

	// Read the JSON file
	std::ifstream myfile (json_path.c_str());
	std::string line = "";
	if (myfile.is_open())
	{
		while (myfile.good())
		{
			getline (myfile, line);
			json_string << line;
		}
		myfile.close();
	}

	// Parse JSON string into JSON objects
	Json::Value root;
	Json::CharReaderBuilder rbuilder;

	std::string errors;
	bool success = Json::parseFromStream(rbuilder, json_string, &root, &errors);
	if (!success)
		// Raise exception
		throw InvalidJSON("Chunk folder could not be opened.", path);


	// Set info from the JSON objects
	try
	{
		info.has_video = root["has_video"].asBool();
		info.has_audio = root["has_audio"].asBool();
		info.duration = root["duration"].asDouble();
		info.file_size = std::stoll(root["file_size"].asString());
		info.height = root["height"].asInt();
		info.width = root["width"].asInt();
		info.pixel_format = root["pixel_format"].asInt();
		info.fps.num = root["fps"]["num"].asInt();
		info.fps.den = root["fps"]["den"].asInt();
		info.video_bit_rate = root["video_bit_rate"].asUInt();
		info.pixel_ratio.num = root["pixel_ratio"]["num"].asInt();
		info.pixel_ratio.den = root["pixel_ratio"]["den"].asInt();
		info.display_ratio.num = root["display_ratio"]["num"].asInt();
		info.display_ratio.den = root["display_ratio"]["den"].asInt();
		info.vcodec = root["vcodec"].asString();
		info.video_length = std::stoll(root["video_length"].asString());
		info.video_stream_index = root["video_stream_index"].asInt();
		info.video_timebase.num = root["video_timebase"]["num"].asInt();
		info.video_timebase.den = root["video_timebase"]["den"].asInt();
		info.interlaced_frame = root["interlaced_frame"].asBool();
		info.top_field_first = root["top_field_first"].asBool();
		info.acodec = root["acodec"].asString();
		info.audio_bit_rate = root["audio_bit_rate"].asUInt();
		info.sample_rate = root["sample_rate"].asUInt();
		info.channels = root["channels"].asInt();