From 9bcf29e9ce11bbc6a421b39eded8f4eb7d94a912 Mon Sep 17 00:00:00 2001
From: Jon Bergli Heier <snakebite@jvnv.net>
Date: Tue, 28 Dec 2010 20:39:20 +0100
Subject: Added decoder/encoder factories.

---
 decoder.cpp                 | 19 +++++++++++++++++++
 decoder.h                   | 10 ++++++++++
 decoders/mpg123_decoder.cpp |  2 --
 encoder.cpp                 | 18 ++++++++++++++++++
 encoder.h                   | 10 ++++++++++
 main.cpp                    |  4 ++++
 6 files changed, 61 insertions(+), 2 deletions(-)
 create mode 100644 decoder.cpp
 create mode 100644 encoder.cpp

diff --git a/decoder.cpp b/decoder.cpp
new file mode 100644
index 0000000..e80c714
--- /dev/null
+++ b/decoder.cpp
@@ -0,0 +1,19 @@
+#include "decoder.h"
+#include "decoders/mpg123_decoder.h"
+
+#include <map>
+
+namespace decoder {
+	typedef boost::function<DecoderBase*()> DecoderFactory;
+	std::map<std::string, DecoderFactory> decoder_factories;
+
+void init() {
+	mpg123_init(); // initialize the mpg123 library
+	decoder_factories["mpg123"] = boost::factory<DecoderMpg123*>();
+}
+
+DecoderBase *get_decoder(const std::string& name) {
+	return decoder_factories[name]();
+}
+
+};
diff --git a/decoder.h b/decoder.h
index 7e76088..b4dcdb6 100644
--- a/decoder.h
+++ b/decoder.h
@@ -2,10 +2,20 @@
 #define DECODER_H
 
 #include <boost/cstdint.hpp>
+#include <boost/function.hpp>
+#include <boost/functional/factory.hpp>
+#include <boost/functional/value_factory.hpp>
+
+#include <string>
 
 class DecoderBase {
 	public:
 		virtual size_t decode(const uint8_t *input, size_t input_size, uint8_t *output, size_t output_size) = 0;
 };
 
+namespace decoder {
+	void init();
+	DecoderBase *get_decoder(const std::string& name);
+};
+
 #endif
diff --git a/decoders/mpg123_decoder.cpp b/decoders/mpg123_decoder.cpp
index 41aef40..0c2629f 100644
--- a/decoders/mpg123_decoder.cpp
+++ b/decoders/mpg123_decoder.cpp
@@ -6,8 +6,6 @@
 #include <stdexcept>
 
 DecoderMpg123::DecoderMpg123() {
-	mpg123_init();
-
 	int error;
 	handle = mpg123_new("generic", &error);
 	if(error) {
diff --git a/encoder.cpp b/encoder.cpp
new file mode 100644
index 0000000..9bea59b
--- /dev/null
+++ b/encoder.cpp
@@ -0,0 +1,18 @@
+#include "encoder.h"
+#include "encoders/lame_encoder.h"
+
+#include <map>
+
+namespace encoder {
+	typedef boost::function<EncoderBase*()> EncoderFactory;
+	std::map<std::string, EncoderFactory> encoder_factories;
+
+void init() {
+	encoder_factories["lame"] = boost::factory<EncoderLame*>();
+}
+
+EncoderBase *get_encoder(const std::string& name) {
+	return encoder_factories[name]();
+}
+
+};
diff --git a/encoder.h b/encoder.h
index a9a0e5c..9949b52 100644
--- a/encoder.h
+++ b/encoder.h
@@ -2,6 +2,11 @@
 #define ENCODER_H
 
 #include <boost/cstdint.hpp>
+#include <boost/function.hpp>
+#include <boost/functional/factory.hpp>
+#include <boost/functional/value_factory.hpp>
+
+#include <string>
 
 class EncoderBase {
 	public:
@@ -9,4 +14,9 @@ class EncoderBase {
 		virtual size_t flush(uint8_t *output, size_t output_size) = 0;
 };
 
+namespace encoder {
+	void init();
+	EncoderBase *get_encoder(const std::string& name);
+};
+
 #endif
diff --git a/main.cpp b/main.cpp
index 3827607..2c0ada7 100644
--- a/main.cpp
+++ b/main.cpp
@@ -1,4 +1,6 @@
 #include "music.h"
+#include "decoder.h"
+#include "encoder.h"
 #include "httpd.h"
 
 #include <iostream>
@@ -9,6 +11,8 @@
 int main(int argc, char **argv) {
 	try {
 		music::init(argv[1]);
+		decoder::init();
+		encoder::init();
 
 		boost::asio::io_service io_service;
 		HTTPServer httpd(io_service);
-- 
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