WAV reader: tolerate odd-length "data" chunk

RIFF chunks are supposed to be padded to even length, but some WAV files feature an odd-length "data" chunk. These changes make the WAV reader code tolerant to this.

modules/juce_audio_formats/codecs/juce_WavAudioFormat.cpp

@@ -1214,6 +1214,8 @@ class WavAudioFormatReader  : public AudioFormatReader
         int cueNoteIndex = 0;
         int cueLabelIndex = 0;
         int cueRegionIndex = 0;
+        // SD move chunkType declaration here, add new state variable prevChunkType
+        int chunkType = 0, prevChunkType = 0;
 
         StringMap dict;
 
@@ -1255,9 +1257,14 @@ class WavAudioFormatReader  : public AudioFormatReader
 
             while ((uint64) input->getPosition() < end && ! input->isExhausted())
             {
-                auto chunkType = input->readInt();
+                // SD keep track of previous chunk type for later comparison
+                prevChunkType = chunkType;
+                chunkType = input->readInt();
                 auto length = (uint32) input->readInt();
-                auto chunkEnd = input->getPosition() + length + (length & 1);
+                // SD after any chunk except "data", advance by chunk length rounded up to next multiple of 2
+                // (some WAV files don't round up length of the data chunk)
+                auto chunkEnd = input->getPosition() + length;
+                if (chunkType != chunkName("data")) chunkEnd += (length & 1);
 
                 if (chunkType == chunkName ("fmt "))
                 {
@@ -1458,6 +1465,11 @@ class WavAudioFormatReader  : public AudioFormatReader
                     input->readIntoMemoryBlock (tracktion, (ssize_t) length);
                     dict[WavAudioFormat::tracktionLoopInfo] = tracktion.toString();
                 }
+                // SD If unknown chunk type seen after "data", we might have had to advance by 1 byte after all
+                else if (prevChunkType == chunkName("data"))
+                {
+                    chunkEnd = input->getPosition() + 1;
+                }
                 else if (chunkEnd <= input->getPosition())
                 {
                     break;