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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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/// need ESP32-A2DP library. ( URL : https://github.com/pschatzmann/ESP32-A2DP/ )
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#include <BluetoothA2DPSink.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 ESP32-A2DP device name
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static constexpr char bt_device_name[] = "ESP32";
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class BluetoothA2DPSink_M5Speaker : public BluetoothA2DPSink
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{
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public:
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BluetoothA2DPSink_M5Speaker(m5::Speaker_Class* m5sound, uint8_t virtual_channel = 0)
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: BluetoothA2DPSink()
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{
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is_i2s_output = false; // I2S control by BluetoothA2DPSink is not required.
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}
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// get rawdata buffer for FFT.
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const int16_t* getBuffer(void) const { return _tri_buf[_export_index]; }
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const char* getMetaData(size_t id, bool clear_flg = true) { if (clear_flg) { _meta_bits &= ~(1<<id); } return (id < metatext_num) ? _meta_text[id] : nullptr; }
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uint8_t getMetaUpdateInfo(void) const { return _meta_bits; }
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void clearMetaUpdateInfo(void) { _meta_bits = 0; }
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void clear(void)
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{
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for (int i = 0; i < 3; ++i)
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{
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if (_tri_buf[i]) { memset(_tri_buf[i], 0, _tri_buf_size[i]); }
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}
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}
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static constexpr size_t metatext_size = 128;
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static constexpr size_t metatext_num = 3;
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protected:
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int16_t* _tri_buf[3] = { nullptr, nullptr, nullptr };
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size_t _tri_buf_size[3] = { 0, 0, 0 };
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size_t _tri_index = 0;
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size_t _export_index = 0;
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char _meta_text[metatext_num][metatext_size];
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uint8_t _meta_bits = 0;
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size_t _sample_rate = 48000;
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void clearMetaData(void)
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{
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for (int i = 0; i < metatext_num; ++i)
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{
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_meta_text[i][0] = 0;
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}
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_meta_bits = (1<<metatext_num)-1;
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}
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void av_hdl_a2d_evt(uint16_t event, void *p_param) override
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{
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esp_a2d_cb_param_t* a2d = (esp_a2d_cb_param_t *)(p_param);
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switch (event) {
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case ESP_A2D_CONNECTION_STATE_EVT:
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if (ESP_A2D_CONNECTION_STATE_CONNECTED == a2d->conn_stat.state)
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{ // 接続
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}
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else
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if (ESP_A2D_CONNECTION_STATE_DISCONNECTED == a2d->conn_stat.state)
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{ // 切断
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}
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break;
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case ESP_A2D_AUDIO_STATE_EVT:
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if (ESP_A2D_AUDIO_STATE_STARTED == a2d->audio_stat.state)
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{ // 再生
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} else
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if ( ESP_A2D_AUDIO_STATE_REMOTE_SUSPEND == a2d->audio_stat.state
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|| ESP_A2D_AUDIO_STATE_STOPPED == a2d->audio_stat.state )
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{ // 停止
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clearMetaData();
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clear();
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}
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break;
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case ESP_A2D_AUDIO_CFG_EVT:
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{
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esp_a2d_cb_param_t *a2d = (esp_a2d_cb_param_t *)(p_param);
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size_t tmp = a2d->audio_cfg.mcc.cie.sbc[0];
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size_t rate = 16000;
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if ( tmp & (1 << 6)) { rate = 32000; }
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else if (tmp & (1 << 5)) { rate = 44100; }
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else if (tmp & (1 << 4)) { rate = 48000; }
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_sample_rate = rate;
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}
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break;
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default:
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break;
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}
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BluetoothA2DPSink::av_hdl_a2d_evt(event, p_param);
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}
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void av_hdl_avrc_evt(uint16_t event, void *p_param) override
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{
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esp_avrc_ct_cb_param_t *rc = (esp_avrc_ct_cb_param_t *)(p_param);
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switch (event)
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{
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case ESP_AVRC_CT_METADATA_RSP_EVT:
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for (size_t i = 0; i < metatext_num; ++i)
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{
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if (0 == (rc->meta_rsp.attr_id & (1 << i))) { continue; }
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strncpy(_meta_text[i], (char*)(rc->meta_rsp.attr_text), metatext_size);
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_meta_bits |= rc->meta_rsp.attr_id;
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break;
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}
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break;
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case ESP_AVRC_CT_CONNECTION_STATE_EVT:
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break;
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case ESP_AVRC_CT_CHANGE_NOTIFY_EVT:
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break;
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default:
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break;
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}
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BluetoothA2DPSink::av_hdl_avrc_evt(event, p_param);
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}
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int16_t* get_next_buf(const uint8_t* src_data, uint32_t len)
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{
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size_t tri = _tri_index < 2 ? _tri_index + 1 : 0;
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if (_tri_buf_size[tri] < len)
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{
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_tri_buf_size[tri] = len;
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if (_tri_buf[tri] != nullptr) { heap_caps_free(_tri_buf[tri]); }
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auto tmp = (int16_t*)heap_caps_malloc(len, MALLOC_CAP_8BIT);
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_tri_buf[tri] = tmp;
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if (tmp == nullptr)
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{
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_tri_buf_size[tri] = 0;
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return nullptr;
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}
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}
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memcpy(_tri_buf[tri], src_data, len);
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_tri_index = tri;
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return _tri_buf[tri];
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}
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void audio_data_callback(const uint8_t *data, uint32_t length) override
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{
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// Reduce memory requirements by dividing the received data into the first and second halves.
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length >>= 1;
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M5.Speaker.playRaw(get_next_buf( data , length), length >> 1, _sample_rate, true, 1, m5spk_virtual_channel);
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M5.Speaker.playRaw(get_next_buf(&data[length], length), length >> 1, _sample_rate, true, 1, m5spk_virtual_channel);
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_export_index = _tri_index;
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}
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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 BluetoothA2DPSink_M5Speaker a2dp_sink = { &M5.Speaker, m5spk_virtual_channel };
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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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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->print("BT A2DP : ");
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gfx->println(bt_device_name);
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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 = (gfx->height() > 80) ? 45 : 21;
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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 (header_height > 32)
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{
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auto bits = a2dp_sink.getMetaUpdateInfo();
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if (bits)
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{
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gfx->startWrite();
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for (int id = 0; id < a2dp_sink.metatext_num; ++id)
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{
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if (0 == (bits & (1<<id))) { continue; }
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size_t y = id * 12;
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if (y+12 >= header_height) { continue; }
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gfx->setCursor(4, 8 + y);
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gfx->fillRect(0, 8 + y, gfx->width(), 12, gfx->getBaseColor());
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gfx->print(a2dp_sink.getMetaData(id));
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gfx->print(" "); // Garbage data removal when UTF8 characters are broken in the middle.
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}
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gfx->display();
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gfx->endWrite();
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}
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}
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else
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{
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static int title_x;
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static int title_id;
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static int wait = INT16_MAX;
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if (a2dp_sink.getMetaUpdateInfo())
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{
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gfx->fillRect(0, 8, gfx->width(), 12, TFT_BLACK);
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a2dp_sink.clearMetaUpdateInfo();
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title_x = 4;
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title_id = 0;
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wait = 0;
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}
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if (--wait < 0)
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{
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int tx = title_x;
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int tid = title_id;
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wait = 3;
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gfx->startWrite();
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uint_fast8_t no_data_bits = 0;
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do
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{
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if (tx == 4) { wait = 255; }
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gfx->setCursor(tx, 8);
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const char* meta = a2dp_sink.getMetaData(tid, false);
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if (meta[0] != 0)
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{
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gfx->print(meta);
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gfx->print(" / ");
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tx = gfx->getCursorX();
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if (++tid == a2dp_sink.metatext_num) { tid = 0; }
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if (tx <= 4)
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{
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title_x = tx;
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title_id = tid;
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}
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}
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else
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{
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if ((no_data_bits |= 1 << tid) == ((1 << a2dp_sink.metatext_num) - 1))
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{
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break;
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}
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if (++tid == a2dp_sink.metatext_num) { tid = 0; }
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}
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} while (tx < gfx->width());
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--title_x;
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gfx->display();
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gfx->endWrite();
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}
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}
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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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||||
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if (fft_enabled && !gfx->displayBusy())
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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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static bool prev_conn;
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bool connected = a2dp_sink.is_connected();
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if (prev_conn != connected)
|
||||
{
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prev_conn = connected;
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if (!connected)
|
||||
{
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a2dp_sink.clear();
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}
|
||||
}
|
||||
|
||||
auto buf = a2dp_sink.getBuffer();
|
||||
if (buf)
|
||||
{
|
||||
memcpy(raw_data, buf, WAVE_SIZE * 2 * sizeof(int16_t)); // stereo data copy
|
||||
gfx->startWrite();
|
||||
|
||||
// draw stereo level meter
|
||||
for (size_t i = 0; i < 2; ++i)
|
||||
{
|
||||
int32_t level = 0;
|
||||
for (size_t j = i; j < 640; j += 32)
|
||||
{
|
||||
uint32_t lv = abs(raw_data[j]);
|
||||
if (level < lv) { level = lv; }
|
||||
}
|
||||
|
||||
int32_t x = (level * gfx->width()) / INT16_MAX;
|
||||
int32_t px = prev_x[i];
|
||||
if (px != x)
|
||||
{
|
||||
gfx->fillRect(x, i * 3, px - x, 2, px < x ? 0xFF9900u : 0x330000u);
|
||||
prev_x[i] = x;
|
||||
}
|
||||
px = peak_x[i];
|
||||
if (px > x)
|
||||
{
|
||||
gfx->writeFastVLine(px, i * 3, 2, TFT_BLACK);
|
||||
px--;
|
||||
}
|
||||
else
|
||||
{
|
||||
px = x;
|
||||
}
|
||||
if (peak_x[i] != px)
|
||||
{
|
||||
peak_x[i] = px;
|
||||
gfx->writeFastVLine(px, i * 3, 2, TFT_WHITE);
|
||||
}
|
||||
}
|
||||
gfx->display();
|
||||
|
||||
// draw FFT level meter
|
||||
fft.exec(raw_data);
|
||||
size_t bw = gfx->width() / 60;
|
||||
if (bw < 3) { bw = 3; }
|
||||
int32_t dsp_height = gfx->height();
|
||||
int32_t fft_height = dsp_height - header_height - 1;
|
||||
size_t xe = gfx->width() / bw;
|
||||
if (xe > (FFT_SIZE/2)) { xe = (FFT_SIZE/2); }
|
||||
int32_t wave_next = ((header_height + dsp_height) >> 1) + (((256 - (raw_data[0] + raw_data[1])) * fft_height) >> 17);
|
||||
|
||||
uint32_t bar_color[2] = { 0x000033u, 0x99AAFFu };
|
||||
|
||||
for (size_t bx = 0; bx <= xe; ++bx)
|
||||
{
|
||||
size_t x = bx * bw;
|
||||
if ((x & 7) == 0) { gfx->display(); taskYIELD(); }
|
||||
int32_t f = fft.get(bx);
|
||||
int32_t y = (f * fft_height) >> 18;
|
||||
if (y > fft_height) { y = fft_height; }
|
||||
y = dsp_height - y;
|
||||
int32_t py = prev_y[bx];
|
||||
if (y != py)
|
||||
{
|
||||
gfx->fillRect(x, y, bw - 1, py - y, bar_color[(y < py)]);
|
||||
prev_y[bx] = y;
|
||||
}
|
||||
py = peak_y[bx] + 1;
|
||||
if (py < y)
|
||||
{
|
||||
gfx->writeFastHLine(x, py - 1, bw - 1, bgcolor(gfx, py - 1));
|
||||
}
|
||||
else
|
||||
{
|
||||
py = y - 1;
|
||||
}
|
||||
if (peak_y[bx] != py)
|
||||
{
|
||||
peak_y[bx] = py;
|
||||
gfx->writeFastHLine(x, py, bw - 1, TFT_WHITE);
|
||||
}
|
||||
|
||||
|
||||
if (wave_enabled)
|
||||
{
|
||||
for (size_t bi = 0; bi < bw; ++bi)
|
||||
{
|
||||
size_t i = x + bi;
|
||||
if (i >= gfx->width() || i >= WAVE_SIZE) { break; }
|
||||
y = wave_y[i];
|
||||
int32_t h = wave_h[i];
|
||||
bool use_bg = (bi+1 == bw);
|
||||
if (h>0)
|
||||
{ /// erase previous wave.
|
||||
gfx->setAddrWindow(i, y, 1, h);
|
||||
h += y;
|
||||
do
|
||||
{
|
||||
uint32_t bg = (use_bg || y < peak_y[bx]) ? bgcolor(gfx, y)
|
||||
: (y == peak_y[bx]) ? 0xFFFFFFu
|
||||
: bar_color[(y >= prev_y[bx])];
|
||||
gfx->writeColor(bg, 1);
|
||||
} while (++y < h);
|
||||
}
|
||||
size_t i2 = i << 1;
|
||||
int32_t y1 = wave_next;
|
||||
wave_next = ((header_height + dsp_height) >> 1) + (((256 - (raw_data[i2] + raw_data[i2 + 1])) * fft_height) >> 17);
|
||||
int32_t y2 = wave_next;
|
||||
if (y1 > y2)
|
||||
{
|
||||
int32_t tmp = y1;
|
||||
y1 = y2;
|
||||
y2 = tmp;
|
||||
}
|
||||
y = y1;
|
||||
h = y2 + 1 - y;
|
||||
wave_y[i] = y;
|
||||
wave_h[i] = h;
|
||||
if (h>0)
|
||||
{ /// draw new wave.
|
||||
gfx->setAddrWindow(i, y, 1, h);
|
||||
h += y;
|
||||
do
|
||||
{
|
||||
uint32_t bg = (y < prev_y[bx]) ? 0xFFCC33u : 0xFFFFFFu;
|
||||
gfx->writeColor(bg, 1);
|
||||
} 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;
|
||||
|
||||
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
|
||||
spk_cfg.task_pinned_core = APP_CPU_NUM;
|
||||
// spk_cfg.task_priority = configMAX_PRIORITIES - 2;
|
||||
spk_cfg.dma_buf_count = 20;
|
||||
// spk_cfg.dma_buf_len = 512;
|
||||
M5.Speaker.config(spk_cfg);
|
||||
}
|
||||
|
||||
|
||||
M5.Speaker.begin();
|
||||
|
||||
a2dp_sink.start(bt_device_name, false);
|
||||
|
||||
gfxSetup(&M5.Display);
|
||||
}
|
||||
|
||||
void loop(void)
|
||||
{
|
||||
gfxLoop(&M5.Display);
|
||||
|
||||
{
|
||||
static int prev_frame;
|
||||
int frame;
|
||||
do
|
||||
{
|
||||
vTaskDelay(1);
|
||||
} while (prev_frame == (frame = millis() >> 3)); /// 8 msec cycle wait
|
||||
prev_frame = frame;
|
||||
}
|
||||
|
||||
M5.update();
|
||||
if (M5.BtnA.wasPressed())
|
||||
{
|
||||
M5.Speaker.tone(440, 50);
|
||||
}
|
||||
if (M5.BtnA.wasDecideClickCount())
|
||||
{
|
||||
switch (M5.BtnA.getClickCount())
|
||||
{
|
||||
case 1:
|
||||
M5.Speaker.tone(1000, 100);
|
||||
a2dp_sink.next();
|
||||
break;
|
||||
|
||||
case 2:
|
||||
M5.Speaker.tone(800, 100);
|
||||
a2dp_sink.previous();
|
||||
break;
|
||||
}
|
||||
}
|
||||
if (M5.BtnA.isHolding() || M5.BtnB.isPressed() || M5.BtnC.isPressed())
|
||||
{
|
||||
size_t v = M5.Speaker.getVolume();
|
||||
int add = (M5.BtnB.isPressed()) ? -1 : 1;
|
||||
if (M5.BtnA.isHolding())
|
||||
{
|
||||
add = M5.BtnA.getClickCount() ? -1 : 1;
|
||||
}
|
||||
v += add;
|
||||
if (v <= 255)
|
||||
{
|
||||
M5.Speaker.setVolume(v);
|
||||
}
|
||||
}
|
||||
}
|
||||
|
||||
#if !defined ( ARDUINO )
|
||||
extern "C" {
|
||||
void loopTask(void*)
|
||||
{
|
||||
setup();
|
||||
for (;;) {
|
||||
loop();
|
||||
}
|
||||
vTaskDelete(NULL);
|
||||
}
|
||||
|
||||
void app_main()
|
||||
{
|
||||
xTaskCreatePinnedToCore(loopTask, "loopTask", 8192, NULL, 1, NULL, 1);
|
||||
}
|
||||
}
|
||||
#endif
|
||||
Loading…
Add table
Add a link
Reference in a new issue