Initial import from SVN

av/InputFormatContext.cpp

@@ -0,0 +1,99 @@
+#include <stdexcept>
+#include <iostream>
+
+#include "InputFormatContext.hpp"
+
+namespace Av
+{
+
+InputFormatContext::InputFormatContext(const boost::filesystem::path& p)
+: _path(p)
+{
+	std::cout << "Opening '" << p.string().c_str() << "'" << std::endl;
+
+	AVFormatContext* context = nullptr;
+
+	// The last three parameters specify the file format, buffer size and
+	// format parameters. By simply specifying NULL or 0 we ask libavformat
+	// to auto-detect the format and use a default buffer size.
+	AvError error = avformat_open_input(&context, p.string().c_str(), nullptr, nullptr);
+	if (error)
+	{
+		std::cerr << "Cannot open '" << p.string() << "', avformat_open_input returned " << error << std::endl;
+		throw std::runtime_error("avformat_open_input failed: " + error.to_str());
+	}
+
+	native(context);
+
+}
+
+InputFormatContext::~InputFormatContext()
+{
+	AVFormatContext* context = native();
+	avformat_close_input(&context);
+}
+
+std::vector<Stream>
+InputFormatContext::getStreams(void)
+{
+	std::vector<Stream> res;
+
+	for (std::size_t i = 0; i < native()->nb_streams; ++i) {
+		res.push_back( Stream(native()->streams[i]));
+	}
+
+	return res;
+}
+
+
+bool
+InputFormatContext::getBestStreamIdx(AVMediaType type, Stream::Idx& index)
+{
+	int res = av_find_best_stream(native(),
+			type,
+			-1,	// Auto
+			-1,	// Auto
+			NULL,
+			0
+			);
+
+	AvError error(res);
+	if (error) {
+		std::cerr << "Cannot get best stream for type " << type << ": " << error << std::endl;
+		return false;
+	}
+	else {
+		index = res;
+		return true;
+	}
+}
+
+void
+InputFormatContext::findStreamInfo(void)
+{
+	native()->max_analyze_duration = 10 * AV_TIME_BASE; // 10 secs
+	AvError err = avformat_find_stream_info(native(), NULL);
+	if (err) {
+		std::cerr << "Couldn't find stream information: " << err << std::endl;
+		throw std::runtime_error("av_find_stream_info failed!");
+	}
+}
+
+
+std::size_t
+InputFormatContext::getDurationSecs() const
+{
+	if (native()->duration != AV_NOPTS_VALUE )
+		return native()->duration / AV_TIME_BASE;
+	else
+		return 0;	// TODO, do something better?
+}
+
+Dictionary
+InputFormatContext::getMetadata(void)
+{
+	return Dictionary(native()->metadata);
+
+}
+
+} //namespace Av