hotfix(analyzer): sync IR Fox RX terminal behavior

Analyzer/raw/IR_Fox/src/IrFoxAnalyzer.cpp

@@ -85,6 +85,22 @@ static const char* message_type_icon(uint8_t message_type)
 	}
 }
 
+static const char* terminal_abort_cause_text(IrFoxAbortCause cause)
+{
+	switch (cause)
+	{
+	case IrFoxAbortCause::BadSync:
+		return "SYNC";
+	case IrFoxAbortCause::BadLength:
+		return "LEN";
+	case IrFoxAbortCause::Overflow:
+		return "OVF";
+	case IrFoxAbortCause::None:
+	default:
+		return "";
+	}
+}
+
 static std::string packet_icon(const IrFoxPacketDecision& decision, IrFoxPacketIconMode mode)
 {
 	const char* status = packet_status_icon(decision.outcome);
@@ -229,6 +245,73 @@ void IrFoxAnalyzer::WorkerThread()
 		add_event_frame(e);
 	};
 
+	// Terminal events are independent of per-bit rendering.  Overview passes an
+	// empty on_bit callback for speed, but must still show an interrupted frame.
+	IrFoxOnTerminal on_terminal = [&](const IrFoxEmitTerminal& terminal) {
+		Frame frame;
+		if (detailed_presentation && !pending_byte_frames.empty())
+		{
+			// Preserve every completed byte except the final one.  The terminal
+			// frame replaces that last byte so legacy frames never overlap.
+			for (size_t i = 0; i + 1 < pending_byte_frames.size(); ++i)
+				add_event_frame(pending_byte_frames[i]);
+			frame.mStartingSampleInclusive = static_cast<S64>(pending_byte_frames.back().start_sample);
+		}
+		else
+		{
+			frame.mStartingSampleInclusive = static_cast<S64>(detailed_presentation ?
+				terminal.detail_start_sample : terminal.start_sample);
+		}
+		frame.mEndingSampleInclusive = static_cast<S64>(terminal.end_sample);
+		if (frame.mStartingSampleInclusive > frame.mEndingSampleInclusive)
+			frame.mStartingSampleInclusive = frame.mEndingSampleInclusive;
+		frame.mType = terminal.reason == IrFoxTerminalReason::Timeout ? IRF_FT_TIMEOUT :
+			(terminal.cause == IrFoxAbortCause::Overflow ? IRF_FT_OVERFLOW : IRF_FT_ABORT);
+		frame.mData1 = terminal.declared_size;
+		frame.mData2 = U64(terminal.received_bits) |
+			(U64(terminal.err_low) << 16) | (U64(terminal.err_high) << 24) | (U64(terminal.err_other) << 32) |
+			(U64(terminal.message_type) << 40) | (U64(terminal.cause) << 48) | (U64(terminal.reason) << 56);
+		frame.mFlags = DISPLAY_AS_ERROR_FLAG;
+		const U64 fid = mResults->AddFrame(frame);
+		pending_byte_frames.clear();
+
+		std::string short_text;
+		if (terminal.reason == IrFoxTerminalReason::Timeout)
+			short_text = "❌ TIMEOUT";
+		else
+		{
+			short_text = "❌ ABORT";
+			const char* cause = terminal_abort_cause_text(terminal.cause);
+			if (*cause != '\0')
+				short_text += std::string(" ") + cause;
+		}
+
+		std::string detail = short_text + " · got=" + std::to_string(terminal.received_bits) + "b";
+		if (terminal.message_type != 0xFFU)
+		{
+			detail += " · ";
+			detail += irfox::messageTypeText(terminal.message_type);
+			detail += " len=" + std::to_string(terminal.declared_size) + "B";
+		}
+		if (terminal.err_low != 0U || terminal.err_high != 0U || terminal.err_other != 0U)
+		{
+			detail += " · err=" + std::to_string(terminal.err_low) + "/" +
+				std::to_string(terminal.err_high) + "/" + std::to_string(terminal.err_other);
+		}
+
+		auto cached_text = std::make_shared<IrFoxCachedFrameText>();
+		cached_text->bubble_texts[0] = "❌";
+		cached_text->bubble_texts[1] = short_text;
+		cached_text->bubble_texts[2] = detail;
+		cached_text->bubble_text_count = 3;
+		mResults->CacheFrameText(fid, cached_text);
+
+		if (detailed_presentation)
+			mResults->AddMarker(static_cast<U64>(terminal.end_sample), AnalyzerResults::ErrorX,
+				mSettings.mInputChannel);
+		note_legacy_frame();
+	};
+
 	IrFoxOnPacket on_pkt = [&](const IrFoxEmitPacket& p) {
 		const IrFoxPacketDecision decision =
 			irfox::classifyPacket(p.data_bytes, p.pack_size, p.crc_ok, mSettings.mReceiverAddress);
@@ -378,7 +461,7 @@ void IrFoxAnalyzer::WorkerThread()
 				return;
 			if (pending[1].sample - pending[0].sample < min_seg_samples)
 				continue;
-			decoder.processEdge(pending[0].sample, pending[0].rising, fs, bit_events, on_pkt);
+			decoder.processEdge(pending[0].sample, pending[0].rising, fs, bit_events, on_pkt, on_terminal);
 			last_dec_edge_sample = pending[0].sample;
 			last_dec_edge_valid = true;
 			pending.erase(pending.begin());
@@ -390,7 +473,7 @@ void IrFoxAnalyzer::WorkerThread()
 		strip_vs_last_decoder();
 		while (pending.size() >= 2 && pending[1].sample - pending[0].sample >= min_seg_samples)
 		{
-			decoder.processEdge(pending[0].sample, pending[0].rising, fs, bit_events, on_pkt);
+			decoder.processEdge(pending[0].sample, pending[0].rising, fs, bit_events, on_pkt, on_terminal);
 			last_dec_edge_sample = pending[0].sample;
 			last_dec_edge_valid = true;
 			pending.erase(pending.begin());
@@ -399,7 +482,7 @@ void IrFoxAnalyzer::WorkerThread()
 		}
 		if (pending.size() == 1)
 		{
-			decoder.processEdge(pending[0].sample, pending[0].rising, fs, bit_events, on_pkt);
+			decoder.processEdge(pending[0].sample, pending[0].rising, fs, bit_events, on_pkt, on_terminal);
 			last_dec_edge_sample = pending[0].sample;
 			last_dec_edge_valid = true;
 			pending.clear();
@@ -428,7 +511,7 @@ void IrFoxAnalyzer::WorkerThread()
 	}
 
 	flush_pending_tail();
-	decoder.flushEnd(mIr->GetSampleNumber(), fs, bit_events, on_pkt);
+	decoder.flushEnd(mIr->GetSampleNumber(), fs, bit_events, on_pkt, on_terminal);
 	if (detailed_presentation)
 		flush_pending_bytes();
 

Analyzer/raw/IR_Fox/src/IrFoxAnalyzerResults.cpp

@@ -74,18 +74,21 @@ void IrFoxAnalyzerResults::GenerateBubbleText(U64 frame_index, Channel& channel,
 	}
 
 	case IRF_FT_PREAMBLE:
+	{
+		AddResultString("📡");
+		AddResultString("📡 PRE");
+		break;
+	}
+
 	case IRF_FT_OVERFLOW:
 	case IRF_FT_ABORT:
+	case IRF_FT_TIMEOUT:
 	{
-		if (frame.mType == IRF_FT_OVERFLOW)
+		if (add_cached_text())
-			AddResultString("OVF");
+			break;
-		else if (frame.mType == IRF_FT_ABORT)
+		AddResultString("❌");
-			AddResultString("SYNC!");
+		AddResultString(frame.mType == IRF_FT_TIMEOUT ? "❌ TIMEOUT" :
-		else
+			(frame.mType == IRF_FT_OVERFLOW ? "❌ ABORT OVF" : "❌ ABORT"));
-		{
-			AddResultString("📡");
-			AddResultString("📡 PRE");
-		}
 		break;
 	}
 
@@ -147,10 +150,28 @@ void IrFoxAnalyzerResults::GenerateExportFile(const char* file, DisplayBase disp
 			typ = "IGNORE_ADDR";
 			break;
 		case IRF_FT_OVERFLOW:
-			typ = "OVF";
+			typ = "ABORT_OVF";
 			break;
 		case IRF_FT_ABORT:
-			typ = "ABORT";
+			switch (static_cast<IrFoxAbortCause>((frame.mData2 >> 48) & 0xFFull))
+			{
+			case IrFoxAbortCause::BadSync:
+				typ = "ABORT_SYNC";
+				break;
+			case IrFoxAbortCause::BadLength:
+				typ = "ABORT_LEN";
+				break;
+			case IrFoxAbortCause::Overflow:
+				typ = "ABORT_OVF";
+				break;
+			case IrFoxAbortCause::None:
+			default:
+				typ = "ABORT";
+				break;
+			}
+			break;
+		case IRF_FT_TIMEOUT:
+			typ = "TIMEOUT";
 			break;
 		case IRF_FT_PREAMBLE:
 			typ = "PRE";
@@ -164,7 +185,7 @@ void IrFoxAnalyzerResults::GenerateExportFile(const char* file, DisplayBase disp
 
 		U64 bit_idx = 0;
 		U32 err_l = 0, err_h = 0, err_o = 0;
-		if (frame.mType == IRF_FT_OVERFLOW || frame.mType == IRF_FT_ABORT)
+		if (frame.mType == IRF_FT_OVERFLOW || frame.mType == IRF_FT_ABORT || frame.mType == IRF_FT_TIMEOUT)
 		{
 			bit_idx = frame.mData2 & 0xFFFFull;
 			err_l = static_cast<U32>((frame.mData2 >> 16) & 0xFFull);

Analyzer/raw/IR_Fox/src/IrFoxDecoder.cpp

@@ -52,6 +52,20 @@ bool IrFoxDecoder::crc_check(uint8_t len, uint16_t& crc_out)
 	return ok;
 }
 
+void IrFoxDecoder::preamble_reset_to_idle()
+{
+	preamble_state_ = PreambleState::Idle;
+	preamble_good_periods_ = 0;
+	preamble_mean_period_us_ = 0;
+	preamble_candidate_last_edge_us_ = 0;
+	preamble_candidate_first_rise_us_ = 0;
+	preamble_candidate_first_rise_valid_ = false;
+	preamble_bubble_start_valid_ = false;
+	is_preamb = false;
+	is_wrong_pack = false;
+	is_buffer_overflow = false;
+}
+
 void IrFoxDecoder::first_rx()
 {
 	err_low_signal = err_high_signal = err_other = 0;
@@ -65,7 +79,7 @@ void IrFoxDecoder::first_rx()
 	i_sync_bit = 0;
 	err_sync_bit = 0;
 	is_wrong_pack = false;
-	is_preamb = true;
+	is_preamb = false;
 	is_recive = false;
 	is_recive_raw = false;
 	msg_type_receive = 0;
@@ -78,12 +92,61 @@ void IrFoxDecoder::first_rx()
 	packet_data_start_sample_ = 0;
 	packet_data_start_valid_ = false;
 	byte_start_sample_ = 0;
-	preamble_state_ = PreambleState::Idle;
+	preamble_reset_to_idle();
-	preamble_good_periods_ = 0;
+}
-	preamble_mean_period_us_ = 0;
+
-	preamble_candidate_last_edge_us_ = 0;
+void IrFoxDecoder::release_preamble_guard(double t_us)
-	preamble_candidate_first_rise_us_ = 0;
+{
-	preamble_candidate_first_rise_valid_ = false;
+	const uint32_t long_silence_us = irfox::irTimeoutUs(rise_sync_time_us) * 2U;
+	// Mirror IR_DecoderRaw::releasePreambleGuard. A negative value is the
+	// floating-point equivalent of the firmware's wrap-safe unsigned offset.
+	prev_rise_us = t_us - static_cast<double>(long_silence_us) - 1.0;
+}
+
+void IrFoxDecoder::emit_terminal(IrFoxTerminalReason reason, IrFoxAbortCause cause, uint64_t end_sample,
+								const IrFoxOnTerminal& on_terminal) const
+{
+	if (!on_terminal)
+		return;
+
+	IrFoxEmitTerminal terminal{};
+	const uint64_t start_sample = packet_start_valid_ ? packet_start_sample_ :
+		(packet_data_start_valid_ ? packet_data_start_sample_ : last_edge_sample);
+	terminal.start_sample = static_cast<int64_t>(start_sample);
+	terminal.detail_start_sample = static_cast<int64_t>(
+		packet_data_start_valid_ ? packet_data_start_sample_ : last_edge_sample);
+	terminal.end_sample = static_cast<int64_t>(end_sample);
+	terminal.reason = reason;
+	terminal.cause = cause;
+	terminal.message_type = i_data_buffer >= irfox::kBitPerByte ?
+		static_cast<uint8_t>((data_buffer[0] >> 5U) & 0x07U) : 0xFFU;
+	terminal.declared_size = static_cast<uint8_t>(pack_size);
+	terminal.received_bits = i_data_buffer;
+	terminal.err_low = err_low_signal;
+	terminal.err_high = err_high_signal;
+	terminal.err_other = err_other;
+	on_terminal(terminal);
+}
+
+void IrFoxDecoder::abort_frame(double t_us, uint64_t end_sample, IrFoxAbortCause cause,
+							   const IrFoxOnTerminal& on_terminal)
+{
+	emit_terminal(IrFoxTerminalReason::Abort, cause, end_sample, on_terminal);
+	is_recive = false;
+	is_recive_raw = false;
+	msg_type_receive = 0;
+	first_rx();
+	release_preamble_guard(t_us);
+}
+
+void IrFoxDecoder::expire_preamble_candidate(double t_us)
+{
+	if (preamble_state_ != PreambleState::Candidate)
+		return;
+	const uint32_t timeout_us =
+		irfox::irTimeoutUs(rise_sync_time_us) * irfox::kPreambleCandidateTimeoutMult;
+	if ((t_us - preamble_candidate_last_edge_us_) > static_cast<double>(timeout_us))
+		preamble_reset_to_idle();
 }
 
 void IrFoxDecoder::listen_start(double t_us)
@@ -97,13 +160,20 @@ void IrFoxDecoder::listen_start(double t_us)
 	}
 }
 
-void IrFoxDecoder::check_timeout(double t_us)
+void IrFoxDecoder::check_timeout(double t_us, uint32_t fs, const IrFoxOnTerminal& on_terminal)
 {
 	if (!is_recive)
 		return;
 	const uint32_t irmax = irfox::irTimeoutUs(rise_sync_time_us);
 	if (t_us - last_edge_time_us > irmax * 2.0)
 	{
+		const uint64_t timeout_us = static_cast<uint64_t>(irmax) * 2U;
+		// The callback fires only after the strict > 2T boundary, but the terminal
+		// frame owns samples only through 2T.  This leaves a following edge free to
+		// seed the next preamble without overlapping inclusive Saleae frames.
+		const uint64_t timeout_samples = (timeout_us * static_cast<uint64_t>(fs)) / 1000000ULL;
+		emit_terminal(IrFoxTerminalReason::Timeout, IrFoxAbortCause::None,
+			last_edge_sample + timeout_samples, on_terminal);
 		// Как IR_DecoderRaw::checkTimeout после фикса: полный сброс, иначе залипание FSM.
 		is_recive = false;
 		msg_type_receive = 0;
@@ -114,29 +184,23 @@ void IrFoxDecoder::check_timeout(double t_us)
 }
 
 void IrFoxDecoder::write_to_buffer(bool bit, bool pack_trace_invert_fix, uint64_t cell_start_s, uint64_t cell_end_s,
-								   const IrFoxOnBit& on_bit, const IrFoxOnPacket& on_pkt, IrFoxEmitBitMode emit_mode)
+								   const IrFoxOnBit& on_bit, const IrFoxOnPacket& on_pkt,
+								   const IrFoxOnTerminal& on_terminal, IrFoxEmitBitMode emit_mode)
 {
 	if (i_data_buffer >= irfox::kDataByteSizeMax * 8u)
 	{
-		if (!is_buffer_overflow && on_bit)
-		{
-			IrFoxEmitBit e{};
-			e.start_sample = static_cast<int64_t>(cell_start_s);
-			e.end_sample = static_cast<int64_t>(cell_end_s);
-			e.frame_type = IRF_FT_OVERFLOW;
-			e.mflags = DISPLAY_AS_ERROR_FLAG;
-			fill_err_snapshot(e);
-			std::strncpy(e.bubble_text, "OVF", sizeof e.bubble_text);
-			e.bubble_text[sizeof e.bubble_text - 1] = '\0';
-			on_bit(e);
-		}
 		is_buffer_overflow = true;
+		abort_frame(last_edge_time_us, cell_end_s, IrFoxAbortCause::Overflow, on_terminal);
+		return;
 	}
 
 	if (is_buffer_overflow || is_preamb || is_wrong_pack)
 	{
-		// Как IR_DecoderRaw::writeToBuffer: полный first_rx() вместо только сброса флагов приёма.
+		// Firmware treats overflow/invalid frame state as a terminal abort and
-		first_rx();
+		// immediately permits a fresh preamble candidate.
+		const IrFoxAbortCause cause = is_buffer_overflow ? IrFoxAbortCause::Overflow :
+			(is_wrong_pack ? IrFoxAbortCause::BadSync : IrFoxAbortCause::None);
+		abort_frame(last_edge_time_us, cell_end_s, cause, on_terminal);
 		return;
 	}
 
@@ -220,14 +284,10 @@ void IrFoxDecoder::write_to_buffer(bool bit, bool pack_trace_invert_fix, uint64_
 				const bool fatal_sync = (err_sync_bit >= irfox::kSyncBits);
 				if (fatal_sync)
 					is_wrong_pack = true;
-				if (on_bit && fatal_sync)
+				if (fatal_sync)
 				{
-					IrFoxEmitBit e{static_cast<int64_t>(cell_start_s), static_cast<int64_t>(cell_end_s), IRF_FT_ABORT,
+					abort_frame(last_edge_time_us, cell_end_s, IrFoxAbortCause::BadSync, on_terminal);
-								   0, 0, DISPLAY_AS_ERROR_FLAG, false, 0, 0, 0};
+					return;
-					fill_err_snapshot(e);
-					std::strncpy(e.bubble_text, "SYNC!", sizeof e.bubble_text);
-					e.bubble_text[sizeof e.bubble_text - 1] = '\0';
-					on_bit(e);
 				}
 			}
 		}
@@ -253,22 +313,12 @@ void IrFoxDecoder::write_to_buffer(bool bit, bool pack_trace_invert_fix, uint64_
 		{
 			pack_size = static_cast<uint16_t>(data_buffer[0] & 0x1Fu);
 			// The receiver rejects a length that cannot contain its two CRC bytes.
-			// Emit the rejection here so the capture explains why no packet follows.
+			// Emit a terminal abort so the capture explains why no packet follows.
-			if (pack_size != 0 && pack_size < irfox::kMsgBytes + irfox::kCrcBytes)
+			if (pack_size < irfox::kMsgBytes + irfox::kCrcBytes)
 			{
 				is_wrong_pack = true;
-				IrFoxEmitPacket pkt{};
+				abort_frame(last_edge_time_us, cell_end_s, IrFoxAbortCause::BadLength, on_terminal);
-				pkt.start_sample = static_cast<int64_t>(packet_start_valid_ ? packet_start_sample_ : cell_start_s);
+				return;
-				pkt.data_start_sample = static_cast<int64_t>(packet_data_start_valid_ ? packet_data_start_sample_ : cell_start_s);
-				pkt.end_sample = static_cast<int64_t>(cell_end_s);
-				pkt.crc_ok = false;
-				pkt.pack_size = static_cast<uint8_t>(pack_size);
-				pkt.err_low = err_low_signal;
-				pkt.err_high = err_high_signal;
-				pkt.err_other = err_other;
-				pkt.data_bytes[0] = data_buffer[0];
-				if (on_pkt)
-					on_pkt(pkt);
 			}
 		}
 
@@ -304,14 +354,20 @@ void IrFoxDecoder::write_to_buffer(bool bit, bool pack_trace_invert_fix, uint64_
 }
 
 void IrFoxDecoder::processEdge(uint64_t sample, bool rising, uint32_t fs, const IrFoxOnBit& on_bit,
-							   const IrFoxOnPacket& on_pkt)
+							   const IrFoxOnPacket& on_pkt, const IrFoxOnTerminal& on_terminal)
 {
 	const double t_us = sample_to_us(sample, fs);
+
+	// Firmware advances terminal timers in this order while no queued edge is
+	// pending. For an offline capture, do the equivalent immediately before the
+	// next timestamped edge is consumed.
+	check_timeout(t_us, fs, on_terminal);
+	listen_start(t_us);
+	expire_preamble_candidate(t_us);
+
+	// A timeout/abort may have restored the nominal adaptive bit period.
 	const uint32_t irmax = irfox::irTimeoutUs(rise_sync_time_us);
 	uint32_t rise_min_us = rise_sync_time_us > irfox::kToleranceUs ? rise_sync_time_us - irfox::kToleranceUs : 0U;
-
-	listen_start(t_us);
-
 	const uint32_t rise_max_us = rise_sync_time_us + irfox::kToleranceUs;
 
 	/** Firmware starts a preamble candidate only on its first rising edge after silence. */
@@ -338,7 +394,6 @@ void IrFoxDecoder::processEdge(uint64_t sample, bool rising, uint32_t fs, const
 	};
 
 	const uint32_t long_silence_us = irmax * 2U;
-	const uint32_t candidate_timeout_us = irmax * irfox::kPreambleCandidateTimeoutMult;
 	if (preamble_state_ == PreambleState::Locked && !is_recive_raw)
 	{
 		preamble_state_ = PreambleState::Idle;
@@ -350,7 +405,16 @@ void IrFoxDecoder::processEdge(uint64_t sample, bool rising, uint32_t fs, const
 		const bool enough_silence = prev_rise_us == 0.0 ? t_us > static_cast<double>(long_silence_us) :
 			(t_us - prev_rise_us) > static_cast<double>(long_silence_us);
 		if (!is_recive_raw && rising && enough_silence)
+		{
 			start_preamble_candidate();
+			// The first rising edge only opens Candidate; it must not also be
+			// compared with itself as a zero-length preamble period.
+			last_edge_time_us = t_us;
+			last_edge_sample = sample;
+			last_processed_edge_us = t_us;
+			have_last_processed = true;
+			return;
+		}
 		else
 		{
 			// IR_DecoderRaw ignores idle edges until a valid preamble candidate starts.
@@ -364,9 +428,6 @@ void IrFoxDecoder::processEdge(uint64_t sample, bool rising, uint32_t fs, const
 
 	if (preamble_state_ == PreambleState::Candidate)
 	{
-		if ((t_us - preamble_candidate_last_edge_us_) > static_cast<double>(candidate_timeout_us))
-			start_preamble_candidate();
-
 		preamble_candidate_last_edge_us_ = t_us;
 		if (!rising)
 		{
@@ -482,8 +543,6 @@ void IrFoxDecoder::processEdge(uint64_t sample, bool rising, uint32_t fs, const
 
 	// As in processDecodedFront, the edge becomes the timing reference only
 	// after the preamble state machine has allowed it through.
-	if (last_edge_time_us > 0.0 && (t_us - last_edge_time_us) > irmax * 2.0 && is_recive)
-		check_timeout(t_us);
 	last_edge_time_us = t_us;
 	last_edge_sample = sample;
 
@@ -591,9 +650,11 @@ void IrFoxDecoder::processEdge(uint64_t sample, bool rising, uint32_t fs, const
 		if (irfox::aroundRisePeriod(rise_period_us, rise_sync_time_us))
 		{
 			if (high_time_us > low_time_us)
-				write_to_buffer(true, false, cell_start_s, cell_end_s, on_bit, on_pkt, IrFoxEmitBitMode::WithBubble);
+				write_to_buffer(true, false, cell_start_s, cell_end_s, on_bit, on_pkt, on_terminal,
+					IrFoxEmitBitMode::WithBubble);
 			else
-				write_to_buffer(false, false, cell_start_s, cell_end_s, on_bit, on_pkt, IrFoxEmitBitMode::WithBubble);
+				write_to_buffer(false, false, cell_start_s, cell_end_s, on_bit, on_pkt, on_terminal,
+					IrFoxEmitBitMode::WithBubble);
 		}
 		else
 		{
@@ -683,13 +744,15 @@ void IrFoxDecoder::processEdge(uint64_t sample, bool rising, uint32_t fs, const
 				if (i == low_count - 1 && invert_err)
 				{
 					invert_err = false;
-					write_to_buffer(true, true, cell_start_s, cell_end_s, on_bit, on_pkt, IrFoxEmitBitMode::Quiet);
+					write_to_buffer(true, true, cell_start_s, cell_end_s, on_bit, on_pkt, on_terminal,
+						IrFoxEmitBitMode::Quiet);
 					merge_warn = true;
 					append_merge(row_is_data, true);
 				}
 				else
 				{
-					write_to_buffer(false, false, cell_start_s, cell_end_s, on_bit, on_pkt, IrFoxEmitBitMode::Quiet);
+					write_to_buffer(false, false, cell_start_s, cell_end_s, on_bit, on_pkt, on_terminal,
+						IrFoxEmitBitMode::Quiet);
 					append_merge(row_is_data, false);
 				}
 			}
@@ -700,13 +763,15 @@ void IrFoxDecoder::processEdge(uint64_t sample, bool rising, uint32_t fs, const
 				if (i == high_count - 1 && invert_err)
 				{
 					invert_err = false;
-					write_to_buffer(false, true, cell_start_s, cell_end_s, on_bit, on_pkt, IrFoxEmitBitMode::Quiet);
+					write_to_buffer(false, true, cell_start_s, cell_end_s, on_bit, on_pkt, on_terminal,
+						IrFoxEmitBitMode::Quiet);
 					merge_warn = true;
 					append_merge(row_is_data, false);
 				}
 				else
 				{
-					write_to_buffer(true, false, cell_start_s, cell_end_s, on_bit, on_pkt, IrFoxEmitBitMode::Quiet);
+					write_to_buffer(true, false, cell_start_s, cell_end_s, on_bit, on_pkt, on_terminal,
+						IrFoxEmitBitMode::Quiet);
 					append_merge(row_is_data, true);
 				}
 			}
@@ -719,11 +784,13 @@ void IrFoxDecoder::processEdge(uint64_t sample, bool rising, uint32_t fs, const
 	have_last_processed = true;
 }
 
-void IrFoxDecoder::flushEnd(uint64_t last_sample, uint32_t fs, const IrFoxOnBit& on_bit, const IrFoxOnPacket& on_pkt)
+void IrFoxDecoder::flushEnd(uint64_t last_sample, uint32_t fs, const IrFoxOnBit& on_bit, const IrFoxOnPacket& on_pkt,
+						   const IrFoxOnTerminal& on_terminal)
 {
 	const double t_us = sample_to_us(last_sample, fs);
+	check_timeout(t_us, fs, on_terminal);
 	listen_start(t_us);
-	check_timeout(t_us);
+	expire_preamble_candidate(t_us);
 	(void)on_bit;
 	(void)on_pkt;
 }

Analyzer/raw/IR_Fox/src/IrFoxDecoder.h

@@ -17,6 +17,7 @@ enum IrFoxFrameType : uint8_t
 	IRF_FT_PACKET_RAW_ONLY = 9,
 	IRF_FT_PACKET_IGNORED_ADDRESS = 10,
 	IRF_FT_DATA_BYTE = 11,
+	IRF_FT_TIMEOUT = 12,
 	IRF_FT_PACKET_OK = IRF_FT_PACKET_ACCEPTED,
 };
 
@@ -57,16 +58,47 @@ struct IrFoxEmitPacket
 	uint8_t data_bytes[irfox::kDataByteSizeMax];
 };
 
+enum class IrFoxTerminalReason : uint8_t
+{
+	Abort,
+	Timeout,
+};
+
+enum class IrFoxAbortCause : uint8_t
+{
+	None,
+	BadSync,
+	BadLength,
+	Overflow,
+};
+
+struct IrFoxEmitTerminal
+{
+	int64_t start_sample;
+	int64_t detail_start_sample;
+	int64_t end_sample;
+	IrFoxTerminalReason reason;
+	IrFoxAbortCause cause;
+	uint8_t message_type;
+	uint8_t declared_size;
+	uint16_t received_bits;
+	uint8_t err_low;
+	uint8_t err_high;
+	uint8_t err_other;
+};
+
 using IrFoxOnBit = std::function<void(const IrFoxEmitBit&)>;
 using IrFoxOnPacket = std::function<void(const IrFoxEmitPacket&)>;
+using IrFoxOnTerminal = std::function<void(const IrFoxEmitTerminal&)>;
 
 class IrFoxDecoder
 {
 public:
 	void reset();
 	void processEdge(uint64_t sample, bool rising, uint32_t sample_rate_hz, const IrFoxOnBit& on_bit,
-					  const IrFoxOnPacket& on_pkt);
+					  const IrFoxOnPacket& on_pkt, const IrFoxOnTerminal& on_terminal);
-	void flushEnd(uint64_t last_sample, uint32_t sample_rate_hz, const IrFoxOnBit& on_bit, const IrFoxOnPacket& on_pkt);
+	void flushEnd(uint64_t last_sample, uint32_t sample_rate_hz, const IrFoxOnBit& on_bit, const IrFoxOnPacket& on_pkt,
+				  const IrFoxOnTerminal& on_terminal);
 
 private:
 	static uint16_t ceil_div_u16(uint16_t val, uint16_t divider);
@@ -74,10 +106,17 @@ private:
 	bool crc_check(uint8_t len, uint16_t& crc_out);
 
 	void first_rx();
+	void preamble_reset_to_idle();
+	void release_preamble_guard(double t_us);
+	void emit_terminal(IrFoxTerminalReason reason, IrFoxAbortCause cause, uint64_t end_sample,
+					   const IrFoxOnTerminal& on_terminal) const;
+	void abort_frame(double t_us, uint64_t end_sample, IrFoxAbortCause cause,
+					 const IrFoxOnTerminal& on_terminal);
+	void expire_preamble_candidate(double t_us);
 	void listen_start(double t_us);
-	void check_timeout(double t_us);
+	void check_timeout(double t_us, uint32_t sample_rate_hz, const IrFoxOnTerminal& on_terminal);
 	void write_to_buffer(bool bit, bool pack_trace_invert_fix, uint64_t cell_start_s, uint64_t cell_end_s,
-						 const IrFoxOnBit& on_bit, const IrFoxOnPacket& on_pkt,
+						 const IrFoxOnBit& on_bit, const IrFoxOnPacket& on_pkt, const IrFoxOnTerminal& on_terminal,
 						 IrFoxEmitBitMode emit_mode = IrFoxEmitBitMode::WithBubble);
 
 	double sample_to_us(uint64_t sample, uint32_t fs) const { return double(sample) * 1e6 / double(fs); }

Analyzer/raw/IR_Fox/src/IrFoxProtocolConstants.h

@@ -36,7 +36,7 @@ constexpr uint8_t kPreambleJitterPct = 18U;
 constexpr uint32_t kPreambleJitterUsMin = 80U;
 constexpr uint32_t kPreamblePeriodMinFactorPct = 220U;
 constexpr uint32_t kPreamblePeriodMaxFactorPct = 340U;
-constexpr uint32_t kPreambleCandidateTimeoutMult = 3U;
+constexpr uint32_t kPreambleCandidateTimeoutMult = 1U;
 
 /** Отброс ложного подъёма после микро-LOW в паузе; зеркало IR_config.h (прошивка). */
 #ifndef IRFOX_SHORT_LOW_GLITCH_REJECT

Analyzer/raw/IR_Fox/tests/IrFoxDecoderTests.cpp

@@ -1,8 +1,20 @@
 #include "IrFoxDecoder.h"
-#include <cassert>
+#include <cstddef>
+#include <cstdio>
+#include <cstdlib>
 #include <cstdint>
 #include <vector>
 
+#define CHECK(expression)                                                                                              \
+	do                                                                                                                   \
+	{                                                                                                                    \
+		if (!(expression))                                                                                                 \
+		{                                                                                                                  \
+			std::fprintf(stderr, "CHECK failed: %s (%s:%d)\n", #expression, __FILE__, __LINE__);                           \
+			std::exit(EXIT_FAILURE);                                                                                        \
+		}                                                                                                                  \
+	} while (false)
+
 namespace {
 
 uint8_t crc8(const uint8_t* data, uint8_t end, uint8_t poly)
@@ -22,23 +34,33 @@ struct DecoderHarness
 	IrFoxDecoder decoder;
 	std::vector<IrFoxEmitPacket> packets;
 	std::vector<IrFoxEmitBit> events;
+	std::vector<IrFoxEmitTerminal> terminals;
 	uint64_t phase = 0;
+	bool collect_bit_events = true;
 	static constexpr uint32_t kFs = 1000000U;
 
-	DecoderHarness()
+	explicit DecoderHarness(bool collect_bits = true) : collect_bit_events(collect_bits)
 	{
 		decoder.reset();
 	}
 
 	void edge(uint64_t sample, bool rising)
 	{
-		decoder.processEdge(sample, rising, kFs, [this](const IrFoxEmitBit& event) { events.push_back(event); },
+		IrFoxOnBit on_bit;
-			[this](const IrFoxEmitPacket& packet) { packets.push_back(packet); });
+		if (collect_bit_events)
+			on_bit = [this](const IrFoxEmitBit& event) { events.push_back(event); };
+		decoder.processEdge(sample, rising, kFs, on_bit,
+			[this](const IrFoxEmitPacket& packet) { packets.push_back(packet); },
+			[this](const IrFoxEmitTerminal& terminal) { terminals.push_back(terminal); });
 	}
 
 	void lockPreamble()
 	{
-		constexpr uint64_t first_rise = 40000;
+		lockPreambleAt(40000U);
+	}
+
+	void lockPreambleAt(uint64_t first_rise)
+	{
 		constexpr uint64_t period = irfox::kBitTimeUs * 3U;
 		edge(first_rise, true);
 		edge(first_rise + 700U, false);
@@ -69,25 +91,73 @@ struct DecoderHarness
 				emitCell(sync);
 		}
 	}
+
+	void emitPacket(const std::vector<uint8_t>& packet)
+	{
+		for (size_t i = 0; i < packet.size(); ++i)
+			emitByte(packet[i], i + 1U != packet.size());
+	}
+
+	void flushAt(uint64_t sample)
+	{
+		IrFoxOnBit on_bit;
+		if (collect_bit_events)
+			on_bit = [this](const IrFoxEmitBit& event) { events.push_back(event); };
+		decoder.flushEnd(sample, kFs, on_bit,
+			[this](const IrFoxEmitPacket& packet) { packets.push_back(packet); },
+			[this](const IrFoxEmitTerminal& terminal) { terminals.push_back(terminal); });
+	}
 };
 
+std::vector<uint8_t> makeValidPacket()
+{
+	std::vector<uint8_t> packet{0xE7, 0x00, 0x01, 0x00, 0x2A, 0x00, 0x00};
+	packet[5] = crc8(packet.data(), 5, irfox::kPoly1);
+	packet[6] = crc8(packet.data(), 6, irfox::kPoly2);
+	return packet;
+}
+
+void assertBadLengthAbortsAndRecovers(uint8_t declared_size)
+{
+	DecoderHarness harness;
+	harness.lockPreamble();
+	const uint8_t header = static_cast<uint8_t>(0xE0U | declared_size);
+	harness.emitByte(header, false);
+
+	CHECK(harness.packets.empty());
+	CHECK(harness.terminals.size() == 1U);
+	CHECK(harness.terminals[0].reason == IrFoxTerminalReason::Abort);
+	CHECK(harness.terminals[0].cause == IrFoxAbortCause::BadLength);
+	CHECK(harness.terminals[0].message_type == 7U);
+	CHECK(harness.terminals[0].declared_size == declared_size);
+	CHECK(harness.terminals[0].received_bits == irfox::kBitPerByte);
+
+	// Firmware abortFrame() releases the 30.288 ms preamble guard.  A receiver
+	// that merely sets is_wrong_pack will miss this complete nearby frame.
+	const uint64_t next_preamble = harness.phase + 5000U;
+	harness.lockPreambleAt(next_preamble);
+	harness.emitPacket(makeValidPacket());
+
+	CHECK(harness.packets.size() == 1U);
+	CHECK(harness.packets[0].crc_ok);
+	CHECK(harness.packets[0].start_sample == static_cast<int64_t>(next_preamble));
+	CHECK(harness.terminals.size() == 1U);
+}
+
 } // namespace
 
 int main()
 {
-	uint8_t packet[] = {0xE7, 0x00, 0x01, 0x00, 0x2A, 0x00, 0x00};
+	const std::vector<uint8_t> packet = makeValidPacket();
-	packet[5] = crc8(packet, 5, irfox::kPoly1);
-	packet[6] = crc8(packet, 6, irfox::kPoly2);
 
 	DecoderHarness valid;
 	valid.lockPreamble();
-	for (uint8_t i = 0; i < sizeof packet; ++i)
+	valid.emitPacket(packet);
-		valid.emitByte(packet[i], i + 1U != sizeof packet);
+	CHECK(valid.packets.size() == 1U);
-	assert(valid.packets.size() == 1U);
+	CHECK(valid.packets[0].crc_ok);
-	assert(valid.packets[0].crc_ok);
+	CHECK(valid.packets[0].pack_size == packet.size());
-	assert(valid.packets[0].pack_size == sizeof packet);
+	CHECK(valid.packets[0].start_sample == 40000);
-	assert(valid.packets[0].start_sample == 40000);
+	CHECK(valid.packets[0].start_sample < valid.packets[0].end_sample);
-	assert(valid.packets[0].start_sample < valid.packets[0].end_sample);
 	bool saw_preamble = false;
 	std::vector<uint8_t> decoded_bytes;
 	for (const IrFoxEmitBit& event : valid.events)
@@ -95,21 +165,118 @@ int main()
 		if (event.frame_type == IRF_FT_PREAMBLE)
 		{
 			saw_preamble = true;
-			assert(event.start_sample == 40000);
+			CHECK(event.start_sample == 40000);
 		}
 		if (event.frame_type == IRF_FT_DATA_BYTE)
 			decoded_bytes.push_back(static_cast<uint8_t>(event.bit_value));
 	}
-	assert(saw_preamble);
+	CHECK(saw_preamble);
-	assert(decoded_bytes.size() == sizeof packet);
+	CHECK(decoded_bytes.size() == packet.size());
-	for (uint8_t i = 0; i < sizeof packet; ++i)
+	for (size_t i = 0; i < packet.size(); ++i)
-		assert(decoded_bytes[i] == packet[i]);
+		CHECK(decoded_bytes[i] == packet[i]);
 
-	DecoderHarness too_short;
+	for (uint8_t declared_size = 0; declared_size < irfox::kMsgBytes + irfox::kCrcBytes; ++declared_size)
-	too_short.lockPreamble();
+		assertBadLengthAbortsAndRecovers(declared_size);
-	too_short.emitByte(0xE1, false);
+
-	assert(too_short.packets.size() == 1U);
+	// Overview supplies no per-bit callback. Terminal reporting must not depend
-	assert(!too_short.packets[0].crc_ok);
+	// on Detailed-mode bit/event generation.
-	assert(too_short.packets[0].pack_size == 1U);
+	DecoderHarness bad_sync(false);
+	bad_sync.lockPreamble();
+	bad_sync.emitByte(0xE7, false);
+	// Header 0xE7 ends in one, while the first sync bit must be inverted.
+	bad_sync.emitCell(true);
+	CHECK(bad_sync.terminals.empty());
+	bad_sync.emitCell(true);
+	CHECK(bad_sync.terminals.empty());
+	bad_sync.emitCell(true);
+	CHECK(bad_sync.events.empty());
+	CHECK(bad_sync.terminals.size() == 1U);
+	CHECK(bad_sync.terminals[0].reason == IrFoxTerminalReason::Abort);
+	CHECK(bad_sync.terminals[0].cause == IrFoxAbortCause::BadSync);
+	CHECK(bad_sync.terminals[0].message_type == 7U);
+	CHECK(bad_sync.terminals[0].declared_size == 7U);
+	CHECK(bad_sync.terminals[0].received_bits == irfox::kBitPerByte);
+	const uint64_t after_sync_abort = bad_sync.phase + 5000U;
+	bad_sync.lockPreambleAt(after_sync_abort);
+	bad_sync.emitPacket(packet);
+	CHECK(bad_sync.packets.size() == 1U);
+	CHECK(bad_sync.packets[0].crc_ok);
+	CHECK(bad_sync.packets[0].start_sample == static_cast<int64_t>(after_sync_abort));
+	CHECK(bad_sync.terminals.size() == 1U);
+
+	DecoderHarness stale_candidate;
+	constexpr uint64_t stale_rise = 40000U;
+	const uint64_t candidate_gap =
+		irfox::irTimeoutUs(irfox::kBitTimeUs) + 1U; // New 1x timeout, still below the old 3x timeout.
+	const uint64_t fresh_preamble = stale_rise + candidate_gap;
+	stale_candidate.edge(stale_rise, true);
+	stale_candidate.lockPreambleAt(fresh_preamble);
+	stale_candidate.emitPacket(packet);
+	CHECK(stale_candidate.packets.size() == 1U);
+	CHECK(stale_candidate.packets[0].crc_ok);
+	CHECK(stale_candidate.packets[0].start_sample == static_cast<int64_t>(fresh_preamble));
+	CHECK(stale_candidate.terminals.empty());
+
+	// If reception times out after PRE lock but before the first data bit, the
+	// Detailed terminal span must begin immediately after the separate PRE frame.
+	DecoderHarness pre_only;
+	pre_only.lockPreamble();
+	const IrFoxEmitBit* pre_event = nullptr;
+	for (const IrFoxEmitBit& event : pre_only.events)
+	{
+		if (event.frame_type == IRF_FT_PREAMBLE)
+			pre_event = &event;
+	}
+	CHECK(pre_event != nullptr);
+	constexpr uint64_t preamble_period = irfox::kBitTimeUs * 3U;
+	const uint64_t pre_lock_edge = 40000U + preamble_period * 2U;
+	const uint64_t abort_silence = 2U * irfox::irTimeoutUs(irfox::kBitTimeUs);
+	pre_only.flushAt(pre_lock_edge + abort_silence + 1U);
+	CHECK(pre_only.terminals.size() == 1U);
+	CHECK(pre_only.terminals[0].reason == IrFoxTerminalReason::Timeout);
+	CHECK(pre_only.terminals[0].received_bits == 0U);
+	CHECK(pre_only.terminals[0].detail_start_sample == pre_event->end_sample + 1);
+	CHECK(pre_only.terminals[0].end_sample == static_cast<int64_t>(pre_lock_edge + abort_silence));
+
+	DecoderHarness truncated;
+	truncated.lockPreamble();
+	truncated.emitByte(0xE7, true);
+	CHECK(truncated.packets.empty());
+	truncated.flushAt(truncated.phase + abort_silence);
+	CHECK(truncated.terminals.empty());
+	truncated.flushAt(truncated.phase + abort_silence + 1U);
+	CHECK(truncated.packets.empty());
+	CHECK(truncated.terminals.size() == 1U);
+	CHECK(truncated.terminals[0].reason == IrFoxTerminalReason::Timeout);
+	CHECK(truncated.terminals[0].cause == IrFoxAbortCause::None);
+	CHECK(truncated.terminals[0].message_type == 7U);
+	CHECK(truncated.terminals[0].declared_size == 7U);
+	CHECK(truncated.terminals[0].received_bits == irfox::kBitPerByte);
+	CHECK(truncated.terminals[0].end_sample == static_cast<int64_t>(truncated.phase + abort_silence));
+	truncated.flushAt(truncated.phase + abort_silence + 100U);
+	CHECK(truncated.terminals.size() == 1U);
+	const uint64_t after_timeout = truncated.phase + abort_silence + 5000U;
+	truncated.lockPreambleAt(after_timeout);
+	truncated.emitPacket(packet);
+	CHECK(truncated.packets.size() == 1U);
+	CHECK(truncated.packets[0].crc_ok);
+	CHECK(truncated.packets[0].start_sample == static_cast<int64_t>(after_timeout));
+	CHECK(truncated.terminals.size() == 1U);
+
+	// With no flush/tick between frames, the first rise strictly beyond 2T both
+	// closes the old frame and opens the new preamble. Inclusive spans must not
+	// share that sample.
+	DecoderHarness adjacent_timeout;
+	adjacent_timeout.lockPreamble();
+	adjacent_timeout.emitByte(0xE7, true);
+	const uint64_t adjacent_preamble = adjacent_timeout.phase + abort_silence + 1U;
+	adjacent_timeout.lockPreambleAt(adjacent_preamble);
+	adjacent_timeout.emitPacket(packet);
+	CHECK(adjacent_timeout.terminals.size() == 1U);
+	CHECK(adjacent_timeout.terminals[0].reason == IrFoxTerminalReason::Timeout);
+	CHECK(adjacent_timeout.packets.size() == 1U);
+	CHECK(adjacent_timeout.packets[0].crc_ok);
+	CHECK(adjacent_timeout.terminals[0].end_sample < adjacent_timeout.packets[0].start_sample);
+	CHECK(adjacent_timeout.packets[0].start_sample == static_cast<int64_t>(adjacent_preamble));
 	return 0;
 }