[FL-1696, FL-1685] IRDA: Add RC5, decoder refactoring (#663)

* [FL-1696] IRDA: Split decoders and protocols
* IRDA: Restruct directories.
* IRDA: fix long timings
* [FL-1685] IRDA: Add RC5

Co-authored-by: あく <alleteam@gmail.com>

lib/irda/encoder_decoder/rc5/irda_decoder_rc5.c

@@ -0,0 +1,79 @@
+#include "irda.h"
+#include <stdbool.h>
+#include <stddef.h>
+#include <stdint.h>
+#include <furi.h>
+#include "../irda_i.h"
+#include "../irda_protocol_defs_i.h"
+
+typedef struct {
+    IrdaCommonDecoder* common_decoder;
+    bool toggle;
+} IrdaRc5Decoder;
+
+bool irda_decoder_rc5_interpret(IrdaCommonDecoder* decoder) {
+    furi_assert(decoder);
+
+    bool result = false;
+    uint32_t* data = (void*) &decoder->data[0];
+    /* Manchester (inverse):
+     *      0->1 : 1
+     *      1->0 : 0
+     */
+    decoder->data[0] = ~decoder->data[0];
+    decoder->data[1] = ~decoder->data[1];
+
+    // MSB first
+    uint8_t address = reverse((uint8_t) decoder->data[0]) & 0x1F;
+    uint8_t command = (reverse((uint8_t) decoder->data[1]) >> 2) & 0x3F;
+    bool start_bit1 = *data & 0x01;
+    bool start_bit2 = *data & 0x02;
+    bool toggle = !!(*data & 0x04);
+
+    if (start_bit1 == 1) {
+        IrdaProtocol protocol = start_bit2 ? IrdaProtocolRC5 : IrdaProtocolRC5X;
+        IrdaMessage* message = &decoder->message;
+        IrdaRc5Decoder *rc5_decoder = decoder->context;
+        bool *prev_toggle = &rc5_decoder->toggle;
+        if ((message->address == address)
+            && (message->command == command)
+            && (message->protocol == protocol)) {
+            message->repeat = (toggle == *prev_toggle);
+        } else {
+            message->repeat = false;
+        }
+        *prev_toggle = toggle;
+        message->command = command;
+        message->address = address;
+        message->protocol = protocol;
+
+        result = true;
+    }
+
+    return result;
+}
+
+void* irda_decoder_rc5_alloc(void) {
+    IrdaRc5Decoder* decoder = furi_alloc(sizeof(IrdaRc5Decoder));
+    decoder->toggle = false;
+    decoder->common_decoder = irda_common_decoder_alloc(&protocol_rc5);
+    irda_common_decoder_set_context(decoder->common_decoder, decoder);
+    return decoder;
+}
+
+IrdaMessage* irda_decoder_rc5_decode(void* decoder, bool level, uint32_t duration) {
+    IrdaRc5Decoder* decoder_rc5 = decoder;
+    return irda_common_decode(decoder_rc5->common_decoder, level, duration);
+}
+
+void irda_decoder_rc5_free(void* decoder) {
+    IrdaRc5Decoder* decoder_rc5 = decoder;
+    irda_common_decoder_free(decoder_rc5->common_decoder);
+    free(decoder_rc5);
+}
+
+void irda_decoder_rc5_reset(void* decoder) {
+    IrdaRc5Decoder* decoder_rc5 = decoder;
+    irda_common_decoder_reset(decoder_rc5->common_decoder);
+}
+

lib/irda/encoder_decoder/rc5/irda_encoder_rc5.c

@@ -0,0 +1,55 @@
+#include "furi/memmgr.h"
+#include "irda.h"
+#include "common/irda_common_i.h"
+#include "irda_protocol_defs_i.h"
+#include <stdint.h>
+#include "../irda_i.h"
+
+typedef struct IrdaEncoderRC5 {
+    IrdaCommonEncoder* common_encoder;
+    bool toggle_bit;
+} IrdaEncoderRC5;
+
+void irda_encoder_rc5_reset(void* encoder_ptr, const IrdaMessage* message) {
+    furi_assert(encoder_ptr);
+
+    IrdaEncoderRC5* encoder = encoder_ptr;
+    IrdaCommonEncoder* common_encoder = encoder->common_encoder;
+    irda_common_encoder_reset(common_encoder);
+
+    uint32_t* data = (void*) common_encoder->data;
+    /* RC5 */
+    *data |= 0x01;    // start bit
+    if (message->protocol == IrdaProtocolRC5) {
+        *data |= 0x02;    // start bit
+    }
+    *data |= encoder->toggle_bit ? 0x04 : 0;
+    *data |= (reverse(message->address) >> 3) << 3; /* address 5 bit */
+    *data |= (reverse(message->command) >> 2) << 8; /* command 6 bit */
+
+    common_encoder->data[0] = ~common_encoder->data[0];
+    common_encoder->data[1] = ~common_encoder->data[1];
+
+    encoder->toggle_bit ^= 1;
+}
+
+IrdaStatus irda_encoder_rc5_encode(void* encoder_ptr, uint32_t* duration, bool* level) {
+    IrdaEncoderRC5* encoder = encoder_ptr;
+    return irda_common_encode(encoder->common_encoder, duration, level);
+}
+
+void* irda_encoder_rc5_alloc(void) {
+    IrdaEncoderRC5* encoder = furi_alloc(sizeof(IrdaEncoderRC5));
+    encoder->common_encoder = irda_common_encoder_alloc(&protocol_rc5);
+    encoder->toggle_bit = false;
+    return encoder;
+}
+
+void irda_encoder_rc5_free(void* encoder_ptr) {
+    furi_assert(encoder_ptr);
+
+    IrdaEncoderRC5* encoder = encoder_ptr;
+    free(encoder->common_encoder);
+    free(encoder);
+}
+

lib/irda/encoder_decoder/rc5/irda_rc5_spec.c

@@ -0,0 +1,28 @@
+#include "../irda_i.h"
+#include "irda_protocol_defs_i.h"
+
+static const IrdaProtocolSpecification irda_rc5_protocol_specification = {
+      .name = "RC5",
+      .address_length = 2,
+      .command_length = 2,
+      .frequency = IRDA_RC5_CARRIER_FREQUENCY,
+      .duty_cycle = IRDA_RC5_DUTY_CYCLE,
+};
+
+static const IrdaProtocolSpecification irda_rc5x_protocol_specification = {
+      .name = "RC5X",
+      .address_length = 2,
+      .command_length = 2,
+      .frequency = IRDA_RC5_CARRIER_FREQUENCY,
+      .duty_cycle = IRDA_RC5_DUTY_CYCLE,
+};
+
+const IrdaProtocolSpecification* irda_rc5_get_spec(IrdaProtocol protocol) {
+    if (protocol == IrdaProtocolRC5)
+        return &irda_rc5_protocol_specification;
+    else if (protocol == IrdaProtocolRC5X)
+        return &irda_rc5x_protocol_specification;
+    else
+        return NULL;
+}
+