driver/audiodec: implement AAC support (via FFMPEG, with some rough edges)

src/driver/audiodec/ffmpegdec.h

@@ -0,0 +1,71 @@
+/*
+	Neutrino-GUI  -   DBoxII-Project
+
+	Copyright (C) 2004 Zwen
+	Copyright (C) 2013 martii
+	
+	ffmpeg audio decoder layer
+	Homepage: http://forum.tuxbox.org/forum
+
+	License: GPL
+
+	This program is free software; you can redistribute it and/or modify
+	it under the terms of the GNU General Public License as published by
+	the Free Software Foundation; either version 2 of the License, or
+	(at your option) any later version.
+
+	This program is distributed in the hope that it will be useful,
+	but WITHOUT ANY WARRANTY; without even the implied warranty of
+	MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+	GNU General Public License for more details.
+
+	You should have received a copy of the GNU General Public License
+	along with this program; if not, write to the Free Software
+	Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA.
+*/
+
+
+#ifndef __FFMPEG_DEC__
+#define __FFMPEG_DEC__
+
+#include <stdio.h>
+#include <stdint.h>
+#include <vector>
+#include "basedec.h"
+# if __WORDSIZE == 64
+#  define UINT64_C(c)   c ## UL
+# else
+#  define UINT64_C(c)   c ## ULL
+# endif
+extern "C" {
+#include <libavformat/avformat.h>
+}
+
+class CFfmpegDec : public CBaseDec
+{
+private:
+	bool meta_data_valid;
+	int mChannels;
+	int mSampleRate;
+	size_t buffer_size;
+	unsigned char *buffer;
+	AVFormatContext *avc;
+	AVCodec *codec;
+	int best_stream;
+	void *in;
+	bool Init(void);
+	void DeInit(void);
+
+public:
+	static CFfmpegDec* getInstance();
+	virtual RetCode Decoder(FILE *, int, State*, CAudioMetaData* m, time_t* t, unsigned int* secondsToSkip);
+	bool GetMetaData(FILE *in, const bool nice, CAudioMetaData* m);
+	CFfmpegDec();
+	~CFfmpegDec();
+	int Read(void *buf, size_t buf_size);
+	int64_t Seek(int64_t offset, int whence);
+
+protected:
+	virtual bool SetMetaData(FILE* in, CAudioMetaData* m);
+};
+#endif