From db9cf551881bc2c78d090ebc58ad024a7870bb9f Mon Sep 17 00:00:00 2001
From: salocinx <nicolas@baumgardt.ch>
Date: Thu, 2 Feb 2017 14:15:07 +0100
Subject: [PATCH] Create ir_CDTV.cpp

---
 ir_CDTV.cpp | 148 ++++++++++++++++++++++++++++++++++++++++++++++++++++
 1 file changed, 148 insertions(+)
 create mode 100644 ir_CDTV.cpp

diff --git a/ir_CDTV.cpp b/ir_CDTV.cpp
new file mode 100644
index 0000000..0185c0b
--- /dev/null
+++ b/ir_CDTV.cpp
@@ -0,0 +1,148 @@
+#include "IRremote.h"
+#include "IRremoteInt.h"
+
+//==============================================================================
+//                            COMMODORE AMIGA CD-TV
+//==============================================================================
+
+//==============================================================================
+//                           CCCC  DDDD   TTTTT V       V
+//                          C      D   D    T    V     V
+//                          C      D   D    T     V   V
+//                          C      D   D    T      V V
+//                           CCCC  DDDD     T       V
+//==============================================================================
+
+//==============================================================================
+//                                 MEASUREMENTS
+//==============================================================================
+
+/*Encoding: UNKNOWN
+	Code : 72A03D6B(32 bits)
+	Timing[51] :
+	+8900, -4450 + 400, -1200 + 350, -400 + 400, -400
+	+ 400, -400 + 400, -1200 + 400, -400 + 350, -450
+	+ 350, -400 + 400, -400 + 400, -350 + 450, -400
+	+ 350, -450 + 350, -400 + 400, -1200 + 400, -1200
+	+ 350, -1200 + 400, -450 + 350, -1200 + 400, -1200
+	+ 350, -1200 + 400, -1200 + 350, -1250 + 350, -1200
+	+ 400, -1200 + 350
+	unsigned int rawData[51] = { 8900,4450, 400,1200, 350,400, 400,400, 400,400, 400,1200, 400,400, 350,450, 350,400, 400,400, 400,350, 450,400, 350,450, 350,400, 400,1200, 400,1200, 350,1200, 400,450, 350,1200, 400,1200, 350,1200, 400,1200, 350,1250, 350,1200, 400,1200, 350 }; // UNKNOWN 72A03D6B
+*/
+
+// NOTE: The array dump above begins at index = 1; therefore offset = 1 in the code below
+
+//==============================================================================
+
+#define CDTV_BITS          24
+// timing intervals in usec
+#define CDTV_HDR_MARK    8850			// start burst
+#define CDTV_HDR_SPACE   4450			// pause after start
+#define CDTV_BIT_MARK     350			// pulse
+#define CDTV_ONE_SPACE   1250			// receive a '1'
+#define CDTV_ZERO_SPACE   450			// receive a '0'
+#define CDTV_RPT_SPACE   2250			// repeat signal
+// message sizes measured in raw pulses
+#define CDTV_RAW_REPEAT_LENGTH	   4    // CDTV_HDR_MARK + CDTV_HDR_SPACE + CDTV_BIT_MARK
+#define CDTV_RAW_SIGNAL_LENGTH	   52   // CDTV_HDR_MARK + CDTV_HDR_SPACE + CDTV_BITS * (CDTV_BIT_MARK + CDTV_ZERO_SPACE | CDTV_ONE_SPACE)
+
+//+=============================================================================
+#if SEND_CDTV
+void  IRsend::sendCDTV(unsigned long data, int nbits) {
+
+	// set IR carrier frequency
+	enableIROut(40);
+
+	// send header
+	mark(CDTV_HDR_MARK);
+	space(CDTV_HDR_SPACE);
+
+	// send data
+	for (unsigned long mask = 1UL << (nbits - 1); mask; mask >>= 1) {
+		if (data & mask) {
+			mark(CDTV_BIT_MARK);
+			space(CDTV_ONE_SPACE);
+		} else {
+			mark(CDTV_BIT_MARK);
+			space(CDTV_ZERO_SPACE);
+		}
+	}
+
+	// send footer
+	mark(CDTV_BIT_MARK);
+	// always end with the LED off
+	space(0);
+
+}
+#endif
+
+//+=============================================================================
+// CDTV have a repeat signal that is 4-bits long [#FFFFFF]
+//
+#if DECODE_CDTV
+bool  IRrecv::decodeCDTV(decode_results *results) {
+
+	unsigned long  data   = 0;    // we decode into this field; start with empty placeholder
+	int            offset = 1;	  // skip first entry since it has not a lot of meaning
+
+	// check if header mark is within range
+	if (!MATCH_MARK(results->rawbuf[offset], CDTV_HDR_MARK)) {
+		return false;
+	}
+	offset++;	// -> offset[2]
+
+	// check for 4-bit repeat signal
+	if ((irparams.rawlen == CDTV_RAW_REPEAT_LENGTH)
+		&& MATCH_SPACE(results->rawbuf[offset], CDTV_RPT_SPACE)
+		&& MATCH_MARK(results->rawbuf[offset+1], CDTV_BIT_MARK)) {
+		results->bits = 4;
+		results->value = 0xFFFFFF;
+		results->decode_type = CDTV;
+		return true;
+	}
+
+	// check on minimal raw length for decoding the 24-bit signal correctly
+	if (irparams.rawlen < CDTV_RAW_SIGNAL_LENGTH) {
+		return false;
+	}
+
+	// check header space
+	if (!MATCH_SPACE(results->rawbuf[offset], CDTV_HDR_SPACE)) {
+		return false;
+	}
+	offset++;	// -> offset[3]
+
+	// build the data
+	for (int i = 0; i < CDTV_BITS; i++) {
+		// check if data mark is available; otherwise break
+		if (!MATCH_MARK(results->rawbuf[offset], CDTV_BIT_MARK)) {
+			return false;
+		}
+		offset++;    // -> offset[4->28]
+		// append this bit
+		if (MATCH_SPACE(results->rawbuf[offset], CDTV_ONE_SPACE)) {
+			data = (data << 1) | 1;
+		} else if (MATCH_SPACE(results->rawbuf[offset], CDTV_ZERO_SPACE)) {
+			data = (data << 1) | 0;
+		} else {
+			return false;
+		}
+		offset++;
+	}
+
+	// validate checksum by comparing lower 12-bits with inverted higher 12-bits
+	unsigned long lo = data & 0xFFF;		// extract lower 12-bit
+	unsigned long hi = data >> 12;			// extract higher 12-bit
+
+	// success if (low XOR high == 0xFFF)
+	if (lo^hi == 0xFFF) {
+		results->bits = CDTV_BITS;
+		results->value = data;
+		results->decode_type = CDTV;
+		return true;
+	}
+
+	return false;
+
+}
+#endif