[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);
+}
+