Move plugins to external folder

applications/external/dtmf_dolphin/dtmf_dolphin_audio.h

@@ -0,0 +1,54 @@
+#pragma once
+// #include "dtmf_dolphin_i.h"
+#include "dtmf_dolphin_event.h"
+#include "dtmf_dolphin_hal.h"
+
+#define SAMPLE_BUFFER_LENGTH 8192
+#define PERIOD_2_PI 6.2832
+#define CPU_CLOCK_FREQ 64000000
+
+typedef struct {
+    float cached_freq;
+    size_t period;
+    float* lookup_table;
+    uint16_t offset;
+} DTMFDolphinOsc;
+
+typedef struct {
+    float duration;
+    size_t period;
+    bool* lookup_table;
+    uint16_t offset;
+} DTMFDolphinPulseFilter;
+
+typedef struct {
+    size_t buffer_length;
+    size_t half_buffer_length;
+    uint8_t* buffer_buffer;
+    uint16_t* sample_buffer;
+    float volume;
+    FuriMessageQueue* queue;
+    DTMFDolphinOsc* osc1;
+    DTMFDolphinOsc* osc2;
+    DTMFDolphinPulseFilter* filter;
+    bool playing;
+} DTMFDolphinAudio;
+
+DTMFDolphinOsc* dtmf_dolphin_osc_alloc();
+
+DTMFDolphinAudio* dtmf_dolphin_audio_alloc();
+
+void dtmf_dolphin_audio_free(DTMFDolphinAudio* player);
+
+void dtmf_dolphin_osc_free(DTMFDolphinOsc* osc);
+
+bool dtmf_dolphin_audio_play_tones(
+    float freq1,
+    float freq2,
+    uint16_t pulses,
+    uint16_t pulse_ms,
+    uint16_t gap_ms);
+
+bool dtmf_dolphin_audio_stop_tones();
+
+bool dtmf_dolphin_audio_handle_tick();