import esp audio lib

2021-08-27 16:42:43 +02:00
parent 489174fdc8
commit 3d437de0e6
567 changed files with 267532 additions and 38 deletions
--- a/FW/leo_muziekdoos_sam51/lib/ESP8266Audio/src/AudioOutputSPDIF.h
+++ b/FW/leo_muziekdoos_sam51/lib/ESP8266Audio/src/AudioOutputSPDIF.h
@@ -0,0 +1,76 @@
+/*
+  AudioOutputSPDIF
+  
+  S/PDIF output via I2S
+  
+  Needs transciever from CMOS level to either optical or coaxial interface
+  See: https://www.epanorama.net/documents/audio/spdif.html
+
+  Original idea and sources: 
+    Forum thread dicussing implementation
+      https://forum.pjrc.com/threads/28639-S-pdif
+    Teensy Audio Library 
+      https://github.com/PaulStoffregen/Audio/blob/master/output_spdif2.cpp
+   
+  Adapted for ESP8266Audio
+
+  Copyright (C) 2020 Ivan Kostoski
+
+  This program is free software: you can redistribute it and/or modify
+  it under the terms of the GNU General Public License as published by
+  the Free Software Foundation, either version 3 of the License, or
+  (at your option) any later version.
+
+  This program is distributed in the hope that it will be useful,
+  but WITHOUT ANY WARRANTY; without even the implied warranty of
+  MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+  GNU General Public License for more details.
+
+  You should have received a copy of the GNU General Public License
+  along with this program.  If not, see <http://www.gnu.org/licenses/>.
+*/
+
+#if defined(ESP32) || defined(ESP8266)
+#pragma once
+
+#include "AudioOutput.h"
+
+#if defined(ESP32)
+#define SPDIF_OUT_PIN_DEFAULT  27
+#define DMA_BUF_COUNT_DEFAULT  8
+#define DMA_BUF_SIZE_DEFAULT   256
+#elif defined(ESP8266)
+#define SPDIF_OUT_PIN_DEFAULT  3
+#define DMA_BUF_COUNT_DEFAULT  32
+#define DMA_BUF_SIZE_DEFAULT   64
+#endif
+
+class AudioOutputSPDIF : public AudioOutput
+{
+  public:
+    AudioOutputSPDIF(int dout_pin=SPDIF_OUT_PIN_DEFAULT, int port=0, int dma_buf_count = DMA_BUF_COUNT_DEFAULT);
+    virtual ~AudioOutputSPDIF() override;
+    bool SetPinout(int bclkPin, int wclkPin, int doutPin);
+    virtual bool SetRate(int hz) override;
+    virtual bool SetBitsPerSample(int bits) override;
+    virtual bool SetChannels(int channels) override;
+    virtual bool begin() override;
+    virtual bool ConsumeSample(int16_t sample[2]) override;
+    virtual bool stop() override;
+
+    bool SetOutputModeMono(bool mono);  // Force mono output no matter the input
+
+    const uint32_t VUCP_PREAMBLE_B = 0xCCE80000; // 11001100 11101000
+    const uint32_t VUCP_PREAMBLE_M = 0xCCE20000; // 11001100 11100010
+    const uint32_t VUCP_PREAMBLE_W = 0xCCE40000; // 11001100 11100100
+
+  protected:
+    virtual inline int AdjustI2SRate(int hz) { return rate_multiplier * hz; }
+    uint8_t portNo;
+    bool mono;
+    bool i2sOn;
+    uint8_t frame_num;
+    uint8_t rate_multiplier;
+};
+
+#endif // _AUDIOOUTPUTSPDIF_H