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#include <SD.h>
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#include <HTTPClient.h>
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#include <math.h>
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/// need ESP8266Audio library. ( URL : https://github.com/earlephilhower/ESP8266Audio/ )
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#include <AudioOutput.h>
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#include <AudioFileSourceSD.h>
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#include <AudioFileSourceID3.h>
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#include <AudioGeneratorMP3.h>
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#include <M5UnitLCD.h>
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#include <M5UnitOLED.h>
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#include <M5Unified.h>
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/// set M5Speaker virtual channel (0-7)
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static constexpr uint8_t m5spk_virtual_channel = 0;
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/// set your mp3 filename
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static constexpr const char* filename[] =
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{
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"/mp3/file01.mp3",
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"/mp3/file02.mp3",
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"/mp3/file03.mp3",
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"/mp3/file04.mp3",
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};
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static constexpr const size_t filecount = sizeof(filename) / sizeof(filename[0]);
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class AudioOutputM5Speaker : public AudioOutput
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{
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public:
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AudioOutputM5Speaker(m5::Speaker_Class* m5sound, uint8_t virtual_sound_channel = 0)
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{
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_m5sound = m5sound;
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_virtual_ch = virtual_sound_channel;
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}
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virtual ~AudioOutputM5Speaker(void) {};
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virtual bool begin(void) override { return true; }
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virtual bool ConsumeSample(int16_t sample[2]) override
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{
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if (_tri_buffer_index < tri_buf_size)
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{
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_tri_buffer[_tri_index][_tri_buffer_index ] = sample[0];
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_tri_buffer[_tri_index][_tri_buffer_index+1] = sample[1];
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_tri_buffer_index += 2;
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return true;
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}
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flush();
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return false;
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}
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virtual void flush(void) override
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{
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if (_tri_buffer_index)
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{
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_m5sound->playRaw(_tri_buffer[_tri_index], _tri_buffer_index, hertz, true, 1, _virtual_ch);
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_tri_index = _tri_index < 2 ? _tri_index + 1 : 0;
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_tri_buffer_index = 0;
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}
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}
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virtual bool stop(void) override
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{
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flush();
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_m5sound->stop(_virtual_ch);
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return true;
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}
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const int16_t* getBuffer(void) const { return _tri_buffer[(_tri_index + 2) % 3]; }
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protected:
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m5::Speaker_Class* _m5sound;
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uint8_t _virtual_ch;
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static constexpr size_t tri_buf_size = 1536;
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int16_t _tri_buffer[3][tri_buf_size];
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size_t _tri_buffer_index = 0;
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size_t _tri_index = 0;
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};
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#define FFT_SIZE 256
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class fft_t
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{
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float _wr[FFT_SIZE + 1];
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float _wi[FFT_SIZE + 1];
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float _fr[FFT_SIZE + 1];
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float _fi[FFT_SIZE + 1];
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uint16_t _br[FFT_SIZE + 1];
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size_t _ie;
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public:
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fft_t(void)
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{
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#ifndef M_PI
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#define M_PI 3.141592653
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#endif
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_ie = logf( (float)FFT_SIZE ) / log(2.0) + 0.5;
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static constexpr float omega = 2.0f * M_PI / FFT_SIZE;
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static constexpr int s4 = FFT_SIZE / 4;
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static constexpr int s2 = FFT_SIZE / 2;
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for ( int i = 1 ; i < s4 ; ++i)
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{
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float f = cosf(omega * i);
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_wi[s4 + i] = f;
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_wi[s4 - i] = f;
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_wr[ i] = f;
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_wr[s2 - i] = -f;
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}
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_wi[s4] = _wr[0] = 1;
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size_t je = 1;
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_br[0] = 0;
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_br[1] = FFT_SIZE / 2;
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for ( size_t i = 0 ; i < _ie - 1 ; ++i )
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{
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_br[ je << 1 ] = _br[ je ] >> 1;
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je = je << 1;
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for ( size_t j = 1 ; j < je ; ++j )
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{
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_br[je + j] = _br[je] + _br[j];
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}
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}
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}
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void exec(const int16_t* in)
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{
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memset(_fi, 0, sizeof(_fi));
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for ( size_t j = 0 ; j < FFT_SIZE / 2 ; ++j )
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{
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float basej = 0.25 * (1.0-_wr[j]);
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size_t r = FFT_SIZE - j - 1;
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/// perform han window and stereo to mono convert.
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_fr[_br[j]] = basej * (in[j * 2] + in[j * 2 + 1]);
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_fr[_br[r]] = basej * (in[r * 2] + in[r * 2 + 1]);
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}
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size_t s = 1;
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size_t i = 0;
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do
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{
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size_t ke = s;
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s <<= 1;
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size_t je = FFT_SIZE / s;
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size_t j = 0;
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do
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{
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size_t k = 0;
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do
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{
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size_t l = s * j + k;
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size_t m = ke * (2 * j + 1) + k;
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size_t p = je * k;
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float Wxmr = _fr[m] * _wr[p] + _fi[m] * _wi[p];
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float Wxmi = _fi[m] * _wr[p] - _fr[m] * _wi[p];
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_fr[m] = _fr[l] - Wxmr;
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_fi[m] = _fi[l] - Wxmi;
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_fr[l] += Wxmr;
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_fi[l] += Wxmi;
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} while ( ++k < ke) ;
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} while ( ++j < je );
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} while ( ++i < _ie );
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}
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uint32_t get(size_t index)
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{
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return (index < FFT_SIZE / 2) ? (uint32_t)sqrtf(_fr[ index ] * _fr[ index ] + _fi[ index ] * _fi[ index ]) : 0u;
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}
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};
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static constexpr size_t WAVE_SIZE = 320;
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static AudioFileSourceSD file;
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static AudioOutputM5Speaker out(&M5.Speaker, m5spk_virtual_channel);
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static AudioGeneratorMP3 mp3;
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static AudioFileSourceID3* id3 = nullptr;
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static fft_t fft;
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static bool fft_enabled = false;
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static bool wave_enabled = false;
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static uint16_t prev_y[(FFT_SIZE / 2)+1];
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static uint16_t peak_y[(FFT_SIZE / 2)+1];
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static int16_t wave_y[WAVE_SIZE];
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static int16_t wave_h[WAVE_SIZE];
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static int16_t raw_data[WAVE_SIZE * 2];
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static int header_height = 0;
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static size_t fileindex = 0;
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void MDCallback(void *cbData, const char *type, bool isUnicode, const char *string)
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{
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(void)cbData;
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if (string[0] == 0) { return; }
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if (strcmp(type, "eof") == 0)
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{
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M5.Display.display();
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return;
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}
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int y = M5.Display.getCursorY();
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if (y+1 >= header_height) { return; }
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M5.Display.fillRect(0, y, M5.Display.width(), 12, M5.Display.getBaseColor());
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M5.Display.printf("%s: %s", type, string);
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M5.Display.setCursor(0, y+12);
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}
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void stop(void)
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{
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if (id3 == nullptr) return;
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out.stop();
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mp3.stop();
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id3->RegisterMetadataCB(nullptr, nullptr);
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id3->close();
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file.close();
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delete id3;
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id3 = nullptr;
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}
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void play(const char* fname)
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{
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if (id3 != nullptr) { stop(); }
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M5.Display.setCursor(0, 8);
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file.open(fname);
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id3 = new AudioFileSourceID3(&file);
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id3->RegisterMetadataCB(MDCallback, (void*)"ID3TAG");
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id3->open(fname);
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mp3.begin(id3, &out);
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}
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uint32_t bgcolor(LGFX_Device* gfx, int y)
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{
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auto h = gfx->height();
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auto dh = h - header_height;
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int v = ((h - y)<<5) / dh;
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if (dh > 44)
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{
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int v2 = ((h - y - 1)<<5) / dh;
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if ((v >> 2) != (v2 >> 2))
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{
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return 0x666666u;
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}
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}
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return gfx->color888(v + 2, v, v + 6);
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}
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void gfxSetup(LGFX_Device* gfx)
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{
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if (gfx == nullptr) { return; }
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if (gfx->width() < gfx->height())
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{
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gfx->setRotation(gfx->getRotation()^1);
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}
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gfx->setFont(&fonts::lgfxJapanGothic_12);
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gfx->setEpdMode(epd_mode_t::epd_fastest);
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gfx->setCursor(0, 8);
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gfx->println("MP3 player");
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gfx->setTextWrap(false);
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gfx->fillRect(0, 6, gfx->width(), 2, TFT_BLACK);
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header_height = 45;
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fft_enabled = !gfx->isEPD();
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if (fft_enabled)
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{
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wave_enabled = (gfx->getBoard() != m5gfx::board_M5UnitLCD);
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for (int y = header_height; y < gfx->height(); ++y)
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{
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gfx->drawFastHLine(0, y, gfx->width(), bgcolor(gfx, y));
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}
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}
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for (int x = 0; x < (FFT_SIZE/2)+1; ++x)
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{
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prev_y[x] = INT16_MAX;
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peak_y[x] = INT16_MAX;
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}
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for (int x = 0; x < WAVE_SIZE; ++x)
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{
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wave_y[x] = gfx->height();
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wave_h[x] = 0;
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}
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}
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void gfxLoop(LGFX_Device* gfx)
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{
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if (gfx == nullptr) { return; }
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if (!gfx->displayBusy())
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{ // draw volume bar
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static int px;
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uint8_t v = M5.Speaker.getVolume();
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int x = v * (gfx->width()) >> 8;
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if (px != x)
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{
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gfx->fillRect(x, 6, px - x, 2, px < x ? 0xAAFFAAu : 0u);
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gfx->display();
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px = x;
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}
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}
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if (fft_enabled && !gfx->displayBusy() && M5.Speaker.isPlaying(m5spk_virtual_channel) > 1)
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{
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static int prev_x[2];
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static int peak_x[2];
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auto buf = out.getBuffer();
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if (buf)
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{
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memcpy(raw_data, buf, WAVE_SIZE * 2 * sizeof(int16_t)); // stereo data copy
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gfx->startWrite();
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// draw stereo level meter
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for (size_t i = 0; i < 2; ++i)
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{
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int32_t level = 0;
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for (size_t j = i; j < 640; j += 32)
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{
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uint32_t lv = abs(raw_data[j]);
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if (level < lv) { level = lv; }
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}
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int32_t x = (level * gfx->width()) / INT16_MAX;
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int32_t px = prev_x[i];
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if (px != x)
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{
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gfx->fillRect(x, i * 3, px - x, 2, px < x ? 0xFF9900u : 0x330000u);
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prev_x[i] = x;
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}
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px = peak_x[i];
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if (px > x)
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{
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gfx->writeFastVLine(px, i * 3, 2, TFT_BLACK);
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px--;
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}
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else
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{
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px = x;
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}
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if (peak_x[i] != px)
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{
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peak_x[i] = px;
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gfx->writeFastVLine(px, i * 3, 2, TFT_WHITE);
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}
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}
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gfx->display();
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// draw FFT level meter
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fft.exec(raw_data);
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size_t bw = gfx->width() / 60;
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if (bw < 3) { bw = 3; }
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int32_t dsp_height = gfx->height();
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int32_t fft_height = dsp_height - header_height - 1;
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size_t xe = gfx->width() / bw;
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if (xe > (FFT_SIZE/2)) { xe = (FFT_SIZE/2); }
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int32_t wave_next = ((header_height + dsp_height) >> 1) + (((256 - (raw_data[0] + raw_data[1])) * fft_height) >> 17);
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uint32_t bar_color[2] = { 0x000033u, 0x99AAFFu };
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for (size_t bx = 0; bx <= xe; ++bx)
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{
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size_t x = bx * bw;
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if ((x & 7) == 0) { gfx->display(); taskYIELD(); }
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int32_t f = fft.get(bx);
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int32_t y = (f * fft_height) >> 18;
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if (y > fft_height) { y = fft_height; }
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y = dsp_height - y;
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int32_t py = prev_y[bx];
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if (y != py)
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{
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gfx->fillRect(x, y, bw - 1, py - y, bar_color[(y < py)]);
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prev_y[bx] = y;
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}
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py = peak_y[bx] + 1;
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if (py < y)
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{
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gfx->writeFastHLine(x, py - 1, bw - 1, bgcolor(gfx, py - 1));
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}
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else
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{
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py = y - 1;
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}
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if (peak_y[bx] != py)
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{
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peak_y[bx] = py;
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gfx->writeFastHLine(x, py, bw - 1, TFT_WHITE);
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}
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if (wave_enabled)
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{
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for (size_t bi = 0; bi < bw; ++bi)
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{
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size_t i = x + bi;
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if (i >= gfx->width() || i >= WAVE_SIZE) { break; }
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y = wave_y[i];
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int32_t h = wave_h[i];
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bool use_bg = (bi+1 == bw);
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if (h>0)
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{ /// erase previous wave.
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gfx->setAddrWindow(i, y, 1, h);
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h += y;
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do
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{
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uint32_t bg = (use_bg || y < peak_y[bx]) ? bgcolor(gfx, y)
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: (y == peak_y[bx]) ? 0xFFFFFFu
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: bar_color[(y >= prev_y[bx])];
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gfx->writeColor(bg, 1);
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} while (++y < h);
|
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}
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size_t i2 = i << 1;
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int32_t y1 = wave_next;
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wave_next = ((header_height + dsp_height) >> 1) + (((256 - (raw_data[i2] + raw_data[i2 + 1])) * fft_height) >> 17);
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int32_t y2 = wave_next;
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if (y1 > y2)
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{
|
||||
int32_t tmp = y1;
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y1 = y2;
|
||||
y2 = tmp;
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}
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y = y1;
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h = y2 + 1 - y;
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wave_y[i] = y;
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wave_h[i] = h;
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if (h>0)
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{ /// draw new wave.
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gfx->setAddrWindow(i, y, 1, h);
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h += y;
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||||
do
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||||
{
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uint32_t bg = (y < prev_y[bx]) ? 0xFFCC33u : 0xFFFFFFu;
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||||
gfx->writeColor(bg, 1);
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} while (++y < h);
|
||||
}
|
||||
}
|
||||
}
|
||||
}
|
||||
gfx->display();
|
||||
gfx->endWrite();
|
||||
}
|
||||
}
|
||||
}
|
||||
|
||||
void setup(void)
|
||||
{
|
||||
auto cfg = M5.config();
|
||||
|
||||
// If you want to play sound from ModuleDisplay, write this
|
||||
// cfg.external_speaker.module_display = true;
|
||||
|
||||
// If you want to play sound from ModuleRCA, write this
|
||||
// cfg.external_speaker.module_rca = true;
|
||||
|
||||
// If you want to play sound from HAT Speaker, write this
|
||||
cfg.external_speaker.hat_spk = true;
|
||||
|
||||
// If you want to play sound from HAT Speaker2, write this
|
||||
// cfg.external_speaker.hat_spk2 = true;
|
||||
|
||||
// If you want to play sound from ATOMIC Speaker, write this
|
||||
cfg.external_speaker.atomic_spk = true;
|
||||
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||||
M5.begin(cfg);
|
||||
|
||||
|
||||
{ /// custom setting
|
||||
auto spk_cfg = M5.Speaker.config();
|
||||
/// Increasing the sample_rate will improve the sound quality instead of increasing the CPU load.
|
||||
spk_cfg.sample_rate = 96000; // default:64000 (64kHz) e.g. 48000 , 50000 , 80000 , 96000 , 100000 , 128000 , 144000 , 192000 , 200000
|
||||
M5.Speaker.config(spk_cfg);
|
||||
}
|
||||
|
||||
|
||||
M5.Speaker.begin();
|
||||
|
||||
while (false == SD.begin(GPIO_NUM_4, SPI, 25000000))
|
||||
{
|
||||
M5.delay(500);
|
||||
}
|
||||
|
||||
gfxSetup(&M5.Display);
|
||||
|
||||
play(filename[fileindex]);
|
||||
}
|
||||
|
||||
void loop(void)
|
||||
{
|
||||
gfxLoop(&M5.Display);
|
||||
|
||||
if (mp3.isRunning())
|
||||
{
|
||||
if (!mp3.loop()) { mp3.stop(); }
|
||||
}
|
||||
else
|
||||
{
|
||||
M5.delay(1);
|
||||
}
|
||||
|
||||
M5.update();
|
||||
if (M5.BtnA.wasClicked())
|
||||
{
|
||||
M5.Speaker.tone(1000, 100);
|
||||
stop();
|
||||
if (++fileindex >= filecount) { fileindex = 0; }
|
||||
play(filename[fileindex]);
|
||||
}
|
||||
else
|
||||
if (M5.BtnA.isHolding() || M5.BtnB.isPressed() || M5.BtnC.isPressed())
|
||||
{
|
||||
size_t v = M5.Speaker.getVolume();
|
||||
if (M5.BtnB.isPressed()) { --v; } else { ++v; }
|
||||
if (v <= 255 || M5.BtnA.isHolding())
|
||||
{
|
||||
M5.Speaker.setVolume(v);
|
||||
}
|
||||
}
|
||||
}
|
||||
Loading…
Add table
Add a link
Reference in a new issue