From 398114468e86df5cacf2ad3ff09e9822e074e4b4 Mon Sep 17 00:00:00 2001
From: Jon Bergli Heier <snakebite@jvnv.net>
Date: Tue, 28 Dec 2010 15:14:45 +0100
Subject: Added LAME encoder.

---
 SConstruct                |  3 ++-
 encoder.h                 | 12 ++++++++++++
 encoders/lame_encoder.cpp | 26 ++++++++++++++++++++++++++
 encoders/lame_encoder.h   | 19 +++++++++++++++++++
 4 files changed, 59 insertions(+), 1 deletion(-)
 create mode 100644 encoder.h
 create mode 100644 encoders/lame_encoder.cpp
 create mode 100644 encoders/lame_encoder.h

diff --git a/SConstruct b/SConstruct
index f29694c..75371ae 100644
--- a/SConstruct
+++ b/SConstruct
@@ -6,6 +6,7 @@ conf = Configure(env)
 conf.CheckLib('boost_system')
 conf.CheckLib('boost_filesystem')
 conf.CheckLib('boost_regex')
+conf.CheckLib('mp3lame')
 env = conf.Finish()
 
 if GetOption('release'):
@@ -15,6 +16,6 @@ else:
 
 env.ParseConfig('pkg-config --cflags --libs libmpg123')
 
-env.Program('audistd', Glob('*.cpp') + Glob('decoders/*.cpp'))
+env.Program('audistd', Glob('*.cpp') + Glob('decoders/*.cpp') + Glob('encoders/*.cpp'))
 
 # vim: syn=python
diff --git a/encoder.h b/encoder.h
new file mode 100644
index 0000000..a9a0e5c
--- /dev/null
+++ b/encoder.h
@@ -0,0 +1,12 @@
+#ifndef ENCODER_H
+#define ENCODER_H
+
+#include <boost/cstdint.hpp>
+
+class EncoderBase {
+	public:
+		virtual size_t encode(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;
+};
+
+#endif
diff --git a/encoders/lame_encoder.cpp b/encoders/lame_encoder.cpp
new file mode 100644
index 0000000..4cbfc9c
--- /dev/null
+++ b/encoders/lame_encoder.cpp
@@ -0,0 +1,26 @@
+#include "lame_encoder.h"
+
+#include <stdexcept>
+
+EncoderLame::EncoderLame() {
+	gfp = lame_init();
+	int error = lame_init_params(gfp);
+
+	if(error < 0) {
+		throw std::runtime_error("failed to initialize LAME");
+	}
+}
+
+EncoderLame::~EncoderLame() {
+	lame_close(gfp);
+}
+
+size_t EncoderLame::encode(uint8_t *input, size_t input_size, uint8_t *output, size_t output_size) {
+	size_t size = lame_encode_buffer_interleaved(gfp, (short*)input, input_size / 4, output, output_size);
+	return size;
+}
+
+size_t EncoderLame::flush(uint8_t *output, size_t output_size) {
+	size_t size = lame_encode_flush(gfp, output, output_size);
+	return size;
+}
diff --git a/encoders/lame_encoder.h b/encoders/lame_encoder.h
new file mode 100644
index 0000000..47f9666
--- /dev/null
+++ b/encoders/lame_encoder.h
@@ -0,0 +1,19 @@
+#ifndef LAME_ENCODER_H
+#define LAME_ENCODER_H
+
+#include "encoder.h"
+
+#include <lame/lame.h>
+
+class EncoderLame : public EncoderBase {
+	private:
+		lame_global_flags *gfp;
+
+	public:
+		EncoderLame();
+		~EncoderLame();
+		size_t encode(uint8_t *input, size_t input_size, uint8_t *output, size_t output_size);
+		size_t flush(uint8_t *output, size_t output_size);
+};
+
+#endif
-- 
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