From db463c5b8ce6b9c9b46ee23af38e64017d93342c Mon Sep 17 00:00:00 2001
From: Sebastian <hi@jbbth.net>
Date: Fri, 6 Jun 2025 10:22:29 +0200
Subject: [PATCH] wave file parser WIP

---
 soundcube-firmware/soundcube-firmware.ino |   3 +
 soundcube-firmware/wavestream.h           | 101 ++++++++++++++++++++++
 2 files changed, 104 insertions(+)
 create mode 100644 soundcube-firmware/wavestream.h

diff --git a/soundcube-firmware/soundcube-firmware.ino b/soundcube-firmware/soundcube-firmware.ino
index 55ab035..f9282f5 100644
--- a/soundcube-firmware/soundcube-firmware.ino
+++ b/soundcube-firmware/soundcube-firmware.ino
@@ -10,6 +10,7 @@
 #include <SD.h>
 #include "codec.h"
 #include "ringbuffer.h"
+#include "wavestream.h"
 
 #define HAPTIC 1
 #define AURAL 1
@@ -26,6 +27,8 @@ int16_t buffer2[ECHO];
 
 RingBuffer<int16_t> ringbuffer[NSTREAMS];
 
+WaveStream stream;
+
 File streams[NSTREAMS];
 bool streams_loaded = false;
 
diff --git a/soundcube-firmware/wavestream.h b/soundcube-firmware/wavestream.h
new file mode 100644
index 0000000..6ae4f10
--- /dev/null
+++ b/soundcube-firmware/wavestream.h
@@ -0,0 +1,101 @@
+#pragma once
+
+#include <SD.h>
+#include "ringbuffer.h"
+
+struct WaveFile{
+  File file;
+  
+  bool load(File _file){
+    file = _file;
+
+    file.seek(0, SeekSet);
+    uint8_t start[4];
+    uint8_t size[4];
+    uint8_t wave[4];
+
+    // RIFF Header
+    file.read(start, 4);
+    if(strcmp("RIFF", (const char*)start) != 0) return false;
+
+    file.seek(4, SeekSet);
+    file.read(size, 4);
+    length = (size[3] << 24 + size[2] << 16 + size[1] << 8 + size[0]) - 8;
+    
+    file.seek(8, SeekSet);
+    file.read(wave, 4);
+    if(strcmp("WAVE", (const char*)wave) != 0) return false;
+
+    // FORMAT
+    uint8_t fmt[4];
+    uint8_t fmtLen[4];
+    uint8_t fmtTag[2];
+    uint8_t fmtChannels[2];
+    uint8_t fmtSamplerate[4];
+    uint8_t fmtBytesPerSecond[4];
+    uint8_t fmtBlockalign[2];
+    uint8_t fmtBitsPerSample[2];
+
+    file.seek(12, SeekSet);
+    file.read(fmt, 4);
+    if(strcmp("fmt ", (const char*)fmt) != 0) return false;
+
+    file.seek(20, SeekSet);
+    file.read(fmtTag, 4);
+    format = fmtTag[1] << 8 + fmtTag[0];
+    if(format != 0x0001) return false;
+
+    file.seek(22, SeekSet);
+    file.read(fmtChannels, 2);
+    channels = fmtChannels[1] << 8 + fmtChannels[0];
+
+    file.seek(24, SeekSet);
+    file.read(fmtSamplerate, 4);
+    samplerate = fmtSamplerate[3] << 24 + fmtSamplerate[2] << 16 + fmtSamplerate[1] << 8 + fmtSamplerate[0];
+
+    file.seek(32, SeekSet);
+    file.read(fmtBlockalign, 2);
+    blockalign = fmtBlockalign[1] << 8 + fmtBlockalign[0];
+
+    file.seek(34, SeekSet);
+    file.read(fmtBitsPerSample, 2);
+    bitspersample = fmtBitsPerSample[1] << 8 + fmtBitsPerSample[0];
+    
+    return true;
+  }
+  
+  uint16_t format = 0;
+  uint32_t length = 0;  
+  uint16_t channels = 0;
+  uint32_t samplerate = 0;
+  uint16_t blockalign = 0;
+  uint16_t bitspersample = 0;
+
+  RingBuffer<int16_t> buffer;
+};
+
+class WaveStream{
+  public:
+  WaveStream(){}
+
+  void begin(){}
+  void update(){}
+
+  bool load(int stream, File wavefile){
+    if(stream < 0 || stream > 7) return false;
+    if(!wavefiles[stream].load(wavefile)) return false;
+    return true;
+  }
+
+  void start(int stream){}
+  void stop(int stream){}
+  void pause(int stream){}
+
+  void stopAll(){}
+  void startAll(){}
+  void pauseAll(){}
+
+  private:
+  WaveFile wavefiles[8];
+  
+};
\ No newline at end of file