// Decode the supplied Whynter message.
//
// Args:
// results: Ptr to the data to decode and where to store the decode result.
// nbits: Nr. of data bits to expect.
// strict: Flag indicating if we should perform strict matching.
// Returns:
// boolean: True if it can decode it, false if it can't.
//
// Status: BETA Strict mode is ALPHA.
//
// Ref:
// https://github.com/z3t0/Arduino-IRremote/blob/master/ir_Whynter.cpp
bool IRrecv::decodeWhynter(decode_results *results, uint16_t nbits,
bool strict) {
if (results->rawlen < 2 * nbits + 2 * HEADER + FOOTER - 1)
return false; // We don't have enough entries to possibly match.
// Compliance
if (strict && nbits != WHYNTER_BITS)
return false; // Incorrect nr. of bits per spec.
uint16_t offset = OFFSET_START;
// Header
// Sequence begins with a bit mark and a zero space.
// These are typically small, so we'll prefer to do the calibration
// on the much larger header mark & space that are next.
if (!matchMark(results->rawbuf[offset++], WHYNTER_BIT_MARK)) return false;
if (!matchSpace(results->rawbuf[offset++], WHYNTER_ZERO_SPACE)) return false;
// Main header mark and space
if (!matchMark(results->rawbuf[offset], WHYNTER_HDR_MARK)) return false;
// Calculate how long the common tick time is based on the header mark.
uint32_t m_tick = results->rawbuf[offset++] * RAWTICK /
WHYNTER_HDR_MARK_TICKS;
if (!matchSpace(results->rawbuf[offset], WHYNTER_HDR_SPACE)) return false;
// Calculate how long the common tick time is based on the header space.
uint32_t s_tick = results->rawbuf[offset++] * RAWTICK /
WHYNTER_HDR_SPACE_TICKS;
// Data
uint64_t data = 0;
match_result_t data_result = matchData(&(results->rawbuf[offset]), nbits,
WHYNTER_BIT_MARK_TICKS * m_tick,
WHYNTER_ONE_SPACE_TICKS * s_tick,
WHYNTER_BIT_MARK_TICKS * m_tick,
WHYNTER_ZERO_SPACE_TICKS * s_tick);
if (data_result.success == false) return false;
data = data_result.data;
offset += data_result.used;
// Footer
if (!matchMark(results->rawbuf[offset++], WHYNTER_BIT_MARK_TICKS * m_tick))
return false;
if (offset < results->rawlen &&
!matchAtLeast(results->rawbuf[offset], WHYNTER_MIN_GAP_TICKS * s_tick))
return false;
// Success
results->decode_type = WHYNTER;
results->bits = nbits;
results->value = data;
results->address = 0;
results->command = 0;
return true;
}
// Decode the supplied Whynter message.
//
// Args:
// results: Ptr to the data to decode and where to store the decode result.
// nbits: Nr. of data bits to expect.
// strict: Flag indicating if we should perform strict matching.
// Returns:
// boolean: True if it can decode it, false if it can't.
//
// Status: BETA Strict mode is ALPHA.
//
// Ref:
// https://github.com/z3t0/Arduino-IRremote/blob/master/ir_Whynter.cpp
bool IRrecv::decodeWhynter(decode_results *results, uint16_t nbits,
bool strict) {
if (results->rawlen < 2 * nbits + 2 * kHeader + kFooter - 1)
return false; // We don't have enough entries to possibly match.
// Compliance
if (strict && nbits != kWhynterBits)
return false; // Incorrect nr. of bits per spec.
uint16_t offset = kStartOffset;
// Header
// Sequence begins with a bit mark and a zero space.
// These are typically small, so we'll prefer to do the calibration
// on the much larger header mark & space that are next.
if (!matchMark(results->rawbuf[offset++], kWhynterBitMark)) return false;
if (!matchSpace(results->rawbuf[offset++], kWhynterZeroSpace)) return false;
// Main header mark and space
if (!matchMark(results->rawbuf[offset], kWhynterHdrMark)) return false;
// Calculate how long the common tick time is based on the header mark.
uint32_t m_tick = results->rawbuf[offset++] * kRawTick / kWhynterHdrMarkTicks;
if (!matchSpace(results->rawbuf[offset], kWhynterHdrSpace)) return false;
// Calculate how long the common tick time is based on the header space.
uint32_t s_tick =
results->rawbuf[offset++] * kRawTick / kWhynterHdrSpaceTicks;
// Data
uint64_t data = 0;
match_result_t data_result =
matchData(&(results->rawbuf[offset]), nbits,
kWhynterBitMarkTicks * m_tick, kWhynterOneSpaceTicks * s_tick,
kWhynterBitMarkTicks * m_tick, kWhynterZeroSpaceTicks * s_tick);
if (data_result.success == false) return false;
data = data_result.data;
offset += data_result.used;
// Footer
if (!matchMark(results->rawbuf[offset++], kWhynterBitMarkTicks * m_tick))
return false;
if (offset < results->rawlen &&
!matchAtLeast(results->rawbuf[offset], kWhynterMinGapTicks * s_tick))
return false;
// Success
results->decode_type = WHYNTER;
results->bits = nbits;
results->value = data;
results->address = 0;
results->command = 0;
return true;
}
// Decode the supplied Mitsubishi message.
//
// Args:
// results: Ptr to the data to decode and where to store the decode result.
// nbits: Nr. of data bits to expect.
// strict: Flag indicating if we should perform strict matching.
// Returns:
// boolean: True if it can decode it, false if it can't.
//
// Status: BETA / previously working.
//
// Notes:
// This protocol appears to have no header.
//
// Ref:
// GlobalCache's Control Tower's Mitsubishi TV data.
bool IRrecv::decodeMitsubishi(decode_results *results, uint16_t nbits,
bool strict) {
if (results->rawlen < 2 * nbits + FOOTER - 1)
return false; // Shorter than shortest possibly expected.
if (strict && nbits != MITSUBISHI_BITS)
return false; // Request is out of spec.
uint16_t offset = OFFSET_START;
uint64_t data = 0;
// No Header
// Data
uint16_t actualBits;
for (actualBits = 0; actualBits < nbits; actualBits++, offset++) {
if (!matchMark(results->rawbuf[offset++], MITSUBISHI_BIT_MARK, 30))
return false;
if (matchSpace(results->rawbuf[offset], MITSUBISHI_ONE_SPACE))
data = (data << 1) | 1; // 1
else if (matchSpace(results->rawbuf[offset], MITSUBISHI_ZERO_SPACE))
data <<= 1; // 0
else
break;
}
// Footer
if (!matchMark(results->rawbuf[offset++], MITSUBISHI_BIT_MARK, 30))
return false;
if (offset < results->rawlen &&
!matchAtLeast(results->rawbuf[offset], MITSUBISHI_MIN_GAP))
return false;
// Compliance
if (actualBits < nbits)
return false;
if (strict && actualBits != nbits)
return false; // Not as we expected.
// Success
results->decode_type = MITSUBISHI;
results->bits = actualBits;
results->value = data;
results->address = 0;
results->command = 0;
return true;
}
// Decode a Philips RC-MM packet (between 12 & 32 bits) if possible.
// Places successful decode information in the results pointer.
// Args:
// results: Ptr to the data to decode and where to store the decode result.
// nbits: Nr. of bits to expect in the data portion. Typically RCMM_BITS.
// strict: Flag to indicate if we strictly adhere to the specification.
// Returns:
// boolean: True if it can decode it, false if it can't.
//
// Status: BETA / Should be working.
//
// Ref:
// http://www.sbprojects.com/knowledge/ir/rcmm.php
bool IRrecv::decodeRCMM(decode_results *results, uint16_t nbits, bool strict) {
uint64_t data = 0;
uint16_t offset = OFFSET_START;
if (results->rawlen <= 4)
return false; // Not enough entries to ever be RCMM.
// Calc the maximum size in bits, the message can be, or that we can accept.
int16_t maxBitSize = std::min((uint16_t) results->rawlen - 4,
(uint16_t) sizeof(data) * 8);
// Compliance
if (strict) {
// Technically the spec says bit sizes should be 12 xor 24. however
// 32 bits has been seen from a device. We are going to assume
// 12 <= bits <= 32 is the 'required' bit length for the spec.
if (maxBitSize < 12 || maxBitSize > 32)
return false;
if (maxBitSize < nbits)
return false; // Short cut, we can never reach the expected nr. of bits.
}
// Header decode
if (!matchMark(results->rawbuf[offset++], RCMM_HDR_MARK))
return false;
if (!matchSpace(results->rawbuf[offset++], RCMM_HDR_SPACE))
return false;
// Data decode
// RC-MM has two bits of data per mark/space pair.
uint16_t actualBits;
for (actualBits = 0; actualBits < maxBitSize; actualBits += 2, offset++) {
if (!matchMark(results->rawbuf[offset++], RCMM_BIT_MARK))
return false;
data <<= 2;
// Use non-default tolerance & excess for matching some of the spaces as the
// defaults are too generous and causes mis-matches in some cases.
if (matchSpace(results->rawbuf[offset],
RCMM_BIT_SPACE_0, TOLERANCE, RCMM_EXCESS))
data += 0;
else if (matchSpace(results->rawbuf[offset],
RCMM_BIT_SPACE_1, TOLERANCE, RCMM_EXCESS))
data += 1;
else if (matchSpace(results->rawbuf[offset],
RCMM_BIT_SPACE_2, RCMM_TOLERANCE, RCMM_EXCESS))
data += 2;
else if (matchSpace(results->rawbuf[offset],
RCMM_BIT_SPACE_3, RCMM_TOLERANCE, RCMM_EXCESS))
data += 3;
else
return false;
}
// Footer decode
if (!matchMark(results->rawbuf[offset++], RCMM_BIT_MARK))
return false;
if (offset < results->rawlen &&
!matchAtLeast(results->rawbuf[offset], RCMM_MIN_GAP))
return false;
// Compliance
if (strict && actualBits != nbits)
return false;
// Success
results->value = data;
results->decode_type = RCMM;
results->bits = actualBits;
results->address = 0;
results->command = 0;
return true;
}
