audio-player: corrected indentation and comments

cmd/audio-player/index.html

@@ -23,7 +23,7 @@
             </div>
             <div class="container-fluid">
                 <div class="form-group">
-                    <input class="form-control-file" type="file" id="fileinput" onchange="processData();">
+                    <input class="form-control-file" type="file" id="fileinput" onchange="playFile();">
                 </div>
             </div>
             <div class="container-fluid">

cmd/audio-player/main.js

@@ -23,20 +23,21 @@ LICENSE
   If not, see [GNU licenses](http://www.gnu.org/licenses).
 */
 
-function processData() {
+// playFile will process and play the chosen target file.
+function playFile() {
     const input = event.target.files[0]
     const reader = new FileReader()
 
     reader.onload = event => {
         bytes = new Uint8Array(event.target.result)
 
-		// decode adpcm to pcm
+        // Decode adpcm to pcm.
         var decoded = decode(Array.from(bytes))
 
-		// convert raw pcm to wav TODO(Trek): make these configurable.
+        // Convert raw pcm to wav TODO(Trek): make these configurable.
         var wav = pcmToWav(decoded, 48000, 1, 16);
 
-		// play wav data in player 
+        // Play wav data in player.
         const blob = new Blob([Uint8Array.from(wav)], {
             type: 'audio/wav'
         });
@@ -65,6 +66,7 @@ function getQuery() {
     }
 }
 
+// load gets the file from the given url and displays a link for download.
 function load() {
     var url = document.getElementById('url').value;
     if (url == "") {

cmd/audio-player/pcm-to-wav.js

@@ -24,24 +24,24 @@ LICENSE
 
 // pcmToWav takes raw pcm data along with the sample rate, number of channels and bit-depth, 
 // and adds a WAV header to it so that it can be read and played by common players.
-// input and output data bytes are represented as arrays of 8 bit integers.
+// Input and output data bytes are represented as arrays of 8 bit integers.
 // WAV spec.: http://soundfile.sapp.org/doc/WaveFormat/
 function pcmToWav(data, rate, channels, bitdepth) {
-    subChunk2ID = [100, 97, 116, 97]; // "data"
+    subChunk2ID = [100, 97, 116, 97]; // "data".
     subChunk2Size = int32ToBytes(data.length);
 
-    subChunk1ID = [102, 109, 116, 32]; // "fmt "
+    subChunk1ID = [102, 109, 116, 32]; // "fmt ".
     subChunk1Size = int32ToBytes(16);
-    audioFmt = int16ToBytes(1); // 1 = PCM
+    audioFmt = int16ToBytes(1); // 1 = PCM.
     numChannels = int16ToBytes(channels);
     sampleRate = int32ToBytes(rate);
     byteRate = int32ToBytes(rate * channels * bitdepth / 8);
     blockAlign = int16ToBytes(channels * bitdepth / 8);
     bitsPerSample = int16ToBytes(bitdepth)
 
-    chunkID = [82, 73, 70, 70]; // "RIFF"
+    chunkID = [82, 73, 70, 70]; // "RIFF".
     chunkSize = int32ToBytes(36 + data.length);
-    format = [87, 65, 86, 69]; // "WAVE"
+    format = [87, 65, 86, 69]; // "WAVE".
 
     result = chunkID;
     result.push(...chunkSize, ...format, ...subChunk1ID, ...subChunk1Size, ...audioFmt, ...numChannels, ...sampleRate, ...byteRate, ...blockAlign, ...bitsPerSample, ...subChunk2ID, ...subChunk2Size);