4 files changed, 12 insertions, 4 deletions
diff --git a/decoder.cpp b/decoder.cpp
index f01215b..c362745 100644
--- a/decoder.cpp
+++ b/decoder.cpp
@@ -10,7 +10,7 @@ DecoderFilter::DecoderFilter(DecoderBase::p decoder_) {
 	decoder = decoder_;
 }
 
-typedef boost::function<boost::shared_ptr<DecoderBase>()> DecoderFactory;
+typedef boost::function<DecoderBase::p ()> DecoderFactory;
 std::map<std::string, DecoderFactory> decoder_factories;
 
 void decoder::init() {
@@ -20,5 +20,5 @@ void decoder::init() {
 
 //! Construct a filter with the given decoder.
 DecoderFilter::p decoder::get_decoder(const std::string& name) {
-	return DecoderFilter::p(new DecoderFilter(DecoderBase::p(decoder_factories[name]())));
+	return DecoderFilter::p(new DecoderFilter(decoder_factories[name]()));
 }
diff --git a/decoder.h b/decoder.h
index 25dbe56..9faabc1 100644
--- a/decoder.h
+++ b/decoder.h
@@ -11,15 +11,19 @@ class DecoderBase {
 	public:
 		typedef boost::shared_ptr<DecoderBase> p;
 		virtual size_t decode(const uint8_t *input, size_t input_size, uint8_t *output, size_t output_size) = 0;
+		virtual ~DecoderBase() {}
+		
 };
 
 //! Input filter to hold a decoder in a filter chain.
 class DecoderFilter : public boost::iostreams::multichar_input_filter {
 	private:
 		DecoderBase::p decoder;
+	
 	public:
 		typedef boost::shared_ptr<DecoderFilter> p;
 		DecoderFilter(DecoderBase::p decoder_);
+		
 		template<typename Source>
 		std::streamsize read(Source& src, char *s, std::streamsize n) {
 			char src_data[0x2000];
diff --git a/encoder.cpp b/encoder.cpp
index cd37daa..0f2a5fe 100644
--- a/encoder.cpp
+++ b/encoder.cpp
@@ -10,7 +10,7 @@ EncoderFilter::EncoderFilter(EncoderBase::p encoder_) {
 	encoder = encoder_;
 }
 
-typedef boost::function<boost::shared_ptr<EncoderBase>()> EncoderFactory;
+typedef boost::function<EncoderBase::p ()> EncoderFactory;
 std::map<std::string, EncoderFactory> encoder_factories;
 
 void encoder::init() {
@@ -19,5 +19,5 @@ void encoder::init() {
 
 //! Construct a filter with the given encoder.
 EncoderFilter::p encoder::get_encoder(const std::string& name) {
-	return EncoderFilter::p(new EncoderFilter(EncoderBase::p(encoder_factories[name]())));
+	return EncoderFilter::p(new EncoderFilter(encoder_factories[name]()));
 }
diff --git a/encoder.h b/encoder.h
index 52c50ab..f68d51c 100644
--- a/encoder.h
+++ b/encoder.h
@@ -11,6 +11,8 @@
 class EncoderBase {
 	public:
 		typedef boost::shared_ptr<EncoderBase> p;
+		virtual ~EncoderBase() {}
+		
 		virtual size_t encode(const uint8_t *input, size_t input_size, uint8_t *output, size_t output_size) = 0;
 		virtual size_t flush(uint8_t *output, size_t output_size) = 0;
 };
@@ -19,9 +21,11 @@ class EncoderBase {
 class EncoderFilter : public boost::iostreams::multichar_input_filter {
 	private:
 		EncoderBase::p encoder;
+	
 	public:
 		typedef boost::shared_ptr<EncoderFilter> p;
 		EncoderFilter(EncoderBase::p encoder_);
+		
 		template<typename Source>
 		std::streamsize read(Source& src, char *s, std::streamsize n) {
 			char src_data[0x2000];