Merge pull request #14 from IDC-Dragon/master

high resolution for I2S input/output, added S/PDIF input/output with configurable sample rate and 24 bit

Author: boblark

AudioConvert_F32.h

@@ -36,7 +36,7 @@ class AudioConvert_I16toF32 : public AudioStream_F32 //receive Int and transmits
 
     static void convertAudio_I16toF32(audio_block_t *in, audio_block_f32_t *out, int len) {
       //WEA Method.  Should look at CMSIS arm_q15_to_float instead: https://www.keil.com/pack/doc/CMSIS/DSP/html/group__q15__to__x.html#gaf8b0d2324de273fc430b0e61ad4e9eb2
-      const float MAX_INT = 32678.0;
+      const float MAX_INT = 32768.0;
       for (int i = 0; i < len; i++) out->data[i] = (float)(in->data[i]);
       arm_scale_f32(out->data, 1.0/MAX_INT, out->data, out->length); //divide by 32678 to get -1.0 to +1.0
     }    

AudioSettings_F32.cpp

@@ -1,5 +1,5 @@
 
-
+#include <Arduino.h>
 #include "AudioSettings_F32.h"
 #include "AudioStream_F32.h"
 

AudioSettings_F32.h

@@ -2,9 +2,11 @@
 #ifndef _AudioSettings_F32_
 #define _AudioSettings_F32_
 
+#include <AudioStream.h> // for AUDIO_SAMPLE_RATE_EXACT, AUDIO_BLOCK_SAMPLES
+
 class AudioSettings_F32 {
 	public:
-		AudioSettings_F32(float fs_Hz, int block_size) :
+		AudioSettings_F32(float fs_Hz=AUDIO_SAMPLE_RATE_EXACT, int block_size=AUDIO_BLOCK_SAMPLES) :
 			sample_rate_Hz(fs_Hz), audio_block_samples(block_size) {}
 		const float sample_rate_Hz;
 		const int audio_block_samples;

OpenAudio_ArduinoLibrary.h

@@ -22,7 +22,10 @@
 #include "AudioMultiply_F32.h"
 #include "AudioSettings_F32.h"
 #include "input_i2s_f32.h"
+#include "input_spdif3_F32.h"
+#include "async_input_spdif3_F32.h"
 #include "output_i2s_f32.h"
+#include "output_spdif3_F32.h"
 #include "play_queue_f32.h"
 #include "record_queue_f32.h"
 #include "synth_pinknoise_f32.h"