MimeDetector: wav adpcm format info

Author: pschatzmann

src/AudioTools/CoreAudio/AudioMetaData/MimeDetector.h

@@ -62,6 +62,7 @@ class MimeDetector : public MimeSource {
  public:
   MimeDetector(bool setupDefault = true) {
     if (setupDefault) {
+      setCheck("audio/vnd.wave; codecs=ms-adpcm", checkWAV_ADPCM);
       setCheck("audio/vnd.wave", checkWAV);
       setCheck("audio/flac", checkFLAC);
       setCheck("audio/ogg; codecs=flac", checkOggFLAC);
@@ -83,12 +84,11 @@ class MimeDetector : public MimeSource {
   }
 
   /// Clears the actual mime and resets the state
-  void end(){
+  void end() {
     actual_mime = nullptr;
     is_first = true;
   }
 
-
   /// write the header to determine the mime
   size_t write(uint8_t* data, size_t len) {
     actual_mime = default_mime;
@@ -97,7 +97,8 @@ class MimeDetector : public MimeSource {
   }
 
   /// adds/updates the checking logic for the indicated mime
-  void setCheck(const char* mime, bool (*check)(uint8_t* start, size_t len), bool isActvie = true) {
+  void setCheck(const char* mime, bool (*check)(uint8_t* start, size_t len),
+                bool isActvie = true) {
     StrView mime_str{mime};
     for (int j = 0; j < checks.size(); j++) {
       Check l_check = checks[j];
@@ -157,6 +158,17 @@ class MimeDetector : public MimeSource {
     return mp3.isValid(start, len);
   }
 
+  static bool checkWAV_ADPCM(uint8_t* start, size_t len) {
+    if (memcmp(start, "RIFF", 4) != 0) return false;
+    WAVHeader header;
+    header.write(start, len);
+    if (!header.parse()) return false;
+    if (header.audioInfo().format == AudioFormat::ADPCM) {
+      return true;
+    }
+    return false;
+  }
+
   static bool checkWAV(uint8_t* start, size_t len) {
     return memcmp(start, "RIFF", 4) == 0;
   }
@@ -292,7 +304,8 @@ class MimeDetector : public MimeSource {
     for (auto& check : checks) {
       if (StrView(check.mime).startsWith(mimePrefix)) {
         check.is_active = active;
-        LOGI("MimeDetector for %s: %s", check.mime, check.is_active ? "active" : "inactive");
+        LOGI("MimeDetector for %s: %s", check.mime,
+             check.is_active ? "active" : "inactive");
         result++;
       }
     }