#include "transcode.h"

#include <boost/iostreams/device/file.hpp>
#include <boost/iostreams/filtering_stream.hpp>

Transcoder::Transcoder(std::string p, HTTPResponse& r, DecoderBase& d, EncoderBase& e) : path(p), res(r), decoder(d), encoder(e) {
}

void Transcoder::run() {
	const std::streamsize buffer_size = 0x1000;
	boost::iostreams::file_source is(path, std::ios::in | std::ios::binary);
	boost::iostreams::filtering_istream s;
	s.push(EncoderFilter(encoder), buffer_size);
	s.push(DecoderFilter(decoder), buffer_size);
	s.push(is, buffer_size);

	char data[0x1000];
	std::streamsize size = 1;
	while(size) {
		s.read(data, 0x1000);
		size = s.gcount();
		if(size > 0)
			res.write(data, size);
	}
}