raspi: use decoder implementation from pidvbip

* remove ilclient
* use a decoder implementation similar to pidvbip instead,
  see https://github.com/linuxstb/pidvbip
* video is decoded in hardware (videocore)
* audio is decoded by libavcodec
* add a AVDec wrapper class for both audio and video decoders
* very raw, needs more polishing. But decodes audio and video :-)
* only tested with h264

raspi/avdec.h

@@ -0,0 +1,34 @@
+/*
+ * (C) 2010-2013 Stefan Seyfried
+ *
+ * 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, see <http://www.gnu.org/licenses/>.
+ *
+ * Audio / Video decoder wrapper class for Raspberry pi
+ */
+
+#include "codec.h"
+
+class AVDec {
+public:
+	AVDec();
+	~AVDec();
+	int start_audio();
+	int start_video();
+	int stop_audio();
+	int stop_video();
+	int set_volume(int vol);
+	int play_pcm(uint8_t *buffer, int size, int ch = -1, int srate = -1, int bits = -1, int le = -1);
+	int show_picture(const char *filename);
+	int pig(int x, int y, int w, int h);
+};