m5::unit::ir::AutoDetectCodec Class Reference

Auto-detecting multi-protocol IR decoder. More...

#include <auto_detect_codec.hpp>

Inheritance diagram for m5::unit::ir::AutoDetectCodec:

Public Member Functions
	AutoDetectCodec ()
	Constructor.
item_container_type	encode (uint16_t address, uint16_t command, bool repeat) override
	Encode using the last detected protocol's codec (default: NEC)
bool	decode (const gpio::m5_rmt_item_t *items, uint32_t num, DecodeResult &result) override
	Try decoding with each protocol codec in priority order.
uint32_t	carrierFrequencyHz () const override
	Carrier frequency of the last detected protocol.
IRCodec *	lastCodec ()
	Get the codec that last successfully decoded.
Access individual codecs
NecCodec &	nec ()
	Get NEC codec instance.
SircCodec &	sirc ()
	Get Sony SIRC codec instance.
Rc5Codec &	rc5 ()
	Get Philips RC5 codec instance.
Rc6Codec &	rc6 ()
	Get Philips RC6 codec instance.
PanasonicCodec &	panasonic ()
	Get Panasonic / Kaseikyo codec instance.
MitsubishiCodec &	mitsubishi ()
	Get Mitsubishi codec instance.
Public Member Functions inherited from m5::unit::ir::IRCodec
	IRCodec (const CodecType t)
	Constructor.
virtual	~IRCodec ()=default
	Destructor.
CodecType	type () const
	Get codec type for safe downcasting.
virtual float	carrierDuty () const
	Carrier duty cycle (0.0 - 1.0)
virtual uint8_t	minFrames () const
	Number of frames that should be transmitted per keypress for this protocol.
virtual uint16_t	frameGapUs () const
	Inter-frame gap (microseconds) when transmitting multiple frames in one burst.
virtual bool	decode (const m5::unit::gpio::m5_rmt_item_t *items, uint32_t num, DecodeResult &result)=0
	Try to decode RMT items into an IR command.

Detailed Description

Auto-detecting multi-protocol IR decoder.

Tries multiple IR protocols in order during decode(). Detection priority:

1. NEC — 9 ms leader mark
2. Panasonic — 3.5 ms leader mark
3. RC6 — 2.67 ms leader mark
4. SIRC — 2.4 ms leader mark
5. Mitsubishi — no leader, short 300us bit mark
6. RC5 — no leader, ~889us Manchester half-bit

For encode(), delegates to the codec matching the last successfully decoded protocol, defaulting to NEC.

Member Function Documentation

carrierFrequencyHz()

uint32_t m5::unit::ir::AutoDetectCodec::carrierFrequencyHz ( ) const

inlineoverridevirtual

Carrier frequency of the last detected protocol.

Returns

Frequency in Hz (default NEC: 38 kHz)

Implements m5::unit::ir::IRCodec.

decode()

bool m5::unit::ir::AutoDetectCodec::decode ( const gpio::m5_rmt_item_t * items, uint32_t num, DecodeResult & result )

override

Try decoding with each protocol codec in priority order.

Parameters

	items	RMT items from receiver
	num	Number of items
[out]	result	Populated when a protocol matches

Returns

True on successful decode

encode()

item_container_type m5::unit::ir::AutoDetectCodec::encode ( uint16_t address, uint16_t command, bool repeat )

inlineoverridevirtual

Encode using the last detected protocol's codec (default: NEC)

Parameters

address	Device address for the target protocol
command	Command code for the target protocol
repeat	True to emit the repeat frame (only NEC has a dedicated one)

Returns

Encoded RMT items

Implements m5::unit::ir::IRCodec.

lastCodec()

IRCodec * m5::unit::ir::AutoDetectCodec::lastCodec ( )

inline

Get the codec that last successfully decoded.

Returns

Pointer to the active codec (NecCodec on startup)