Remove Node.js Buffer dependencies

lib/id3v2/FrameParser.ts

@@ -184,7 +184,7 @@ export class FrameParser {
           pic.description = util.decodeString(uint8Array.slice(offset, fzero), encoding);
           offset = fzero + nullTerminatorLength;
 
-          pic.data = Buffer.from(uint8Array.slice(offset, length));
+          pic.data = uint8Array.slice(offset, length);
           output = pic;
         }
         break;

lib/id3v2/ID3v2Parser.ts

@@ -30,6 +30,8 @@ interface IFrameHeader {
   flags?: IFrameFlags;
 }
 
+const asciiDecoder = new TextDecoder('ascii');
+
 export class ID3v2Parser {
 
   public static removeUnsyncBytes(buffer: Uint8Array): Uint8Array {
@@ -204,7 +206,7 @@ export class ID3v2Parser {
 
       case 2:
         header = {
-          id: Buffer.from(uint8Array.slice(0, 3)).toString('ascii'),
+          id: asciiDecoder.decode(uint8Array.slice(0, 3)),
           length: Token.UINT24_BE.get(uint8Array, 3)
         };
         if (!header.id.match(/[A-Z0-9]{3}/g)) {
@@ -215,7 +217,7 @@ export class ID3v2Parser {
       case 3:
       case 4:
         header = {
-          id:  Buffer.from(uint8Array.slice(0, 4)).toString('ascii'),
+          id: asciiDecoder.decode(uint8Array.slice(0, 4)),
           length: (majorVer === 4 ?  UINT32SYNCSAFE : Token.UINT32_BE).get(uint8Array, 4),
           flags: ID3v2Parser.readFrameFlags(uint8Array.slice(8, 10))
         };

lib/mp4/AtomToken.ts

@@ -323,7 +323,7 @@ export interface IDataAtom {
   /**
    * An array of bytes containing the value of the metadata.
    */
-  value: Buffer;
+  value: Uint8Array;
 }
 
 /**
@@ -341,7 +341,7 @@ export class DataAtom implements IGetToken<IDataAtom> {
         type: Token.UINT24_BE.get(buf, off + 1)
       },
       locale: Token.UINT24_BE.get(buf, off + 4),
-      value: Buffer.from(new Token.Uint8ArrayType(this.len - 8).get(buf, off + 8))
+      value: new Token.Uint8ArrayType(this.len - 8).get(buf, off + 8)
     };
   }
 }

lib/mp4/MP4Parser.ts

@@ -340,7 +340,7 @@ export class MP4Parser extends BasicParser {
             break;
 
           case 'rate':
-            const rate = dataAtom.value.toString('ascii');
+            const rate = new TextDecoder('ascii').decode(dataAtom.value);
             await this.addTag(tagKey, rate);
             break;
 
@@ -351,15 +351,15 @@ export class MP4Parser extends BasicParser {
 
       case 1: // UTF-8: Without any count or NULL terminator
       case 18: // Unknown: Found in m4b in combination with a '©gen' tag
-        await this.addTag(tagKey, dataAtom.value.toString('utf-8'));
+        await this.addTag(tagKey, new TextDecoder('utf-8').decode(dataAtom.value));
         break;
 
       case 13: // JPEG
         if (this.options.skipCovers)
           break;
         await this.addTag(tagKey, {
           format: 'image/jpeg',
-          data: Buffer.from(dataAtom.value)
+          data: Uint8Array.from(dataAtom.value)
         });
         break;
 
@@ -368,7 +368,7 @@ export class MP4Parser extends BasicParser {
           break;
         await this.addTag(tagKey, {
           format: 'image/png',
-          data: Buffer.from(dataAtom.value)
+          data: Uint8Array.from(dataAtom.value)
         });
         break;
 
@@ -381,15 +381,15 @@ export class MP4Parser extends BasicParser {
         break;
 
       case 65: // An 8-bit signed integer
-        await this.addTag(tagKey, dataAtom.value.readInt8(0));
+        await this.addTag(tagKey, Token.UINT8.get(dataAtom.value,0));
         break;
 
       case 66: // A big-endian 16-bit signed integer
-        await this.addTag(tagKey, dataAtom.value.readInt16BE(0));
+        await this.addTag(tagKey, Token.UINT16_BE.get(dataAtom.value,0));
         break;
 
       case 67: // A big-endian 32-bit signed integer
-        await this.addTag(tagKey, dataAtom.value.readInt32BE(0));
+        await this.addTag(tagKey, Token.UINT32_BE.get(dataAtom.value,0));
         break;
 
       default:

lib/musepack/sv7/StreamVersion7.ts

@@ -44,7 +44,7 @@ export const Header: IGetToken<IHeader> = {
 
     const header = {
       // word 0
-      signature: Buffer.from(buf).toString('latin1', off, off + 3),
+      signature: new TextDecoder('latin`1').decode(buf.subarray(off, off + 3)),
       // versionIndex number * 1000 (3.81 = 3810) (remember that 4-byte alignment causes this to take 4-bytes)
       streamMinorVersion:  util.getBitAllignedNumber(buf, off + 3, 0, 4),
       streamMajorVersion: util.getBitAllignedNumber(buf, off + 3, 4, 4),

lib/ogg/OggParser.ts

@@ -94,7 +94,7 @@ export class OggParser extends BasicParser {
         const pageData = await this.tokenizer.readToken<Uint8Array>(new Token.Uint8ArrayType(segmentTable.totalPageSize));
         debug('firstPage=%s, lastPage=%s, continued=%s', header.headerType.firstPage, header.headerType.lastPage, header.headerType.continued);
         if (header.headerType.firstPage) {
-          const id = new Token.StringType(7, 'ascii').get(Buffer.from(pageData), 0);
+          const id = new TextDecoder('ascii').decode(pageData.subarray(0, 7));
           switch (id) {
             case '\x01vorbis': // Ogg/Vorbis
               debug('Set page consumer to Ogg/Vorbis');

lib/ogg/vorbis/Vorbis.ts

@@ -61,7 +61,7 @@ export class VorbisPictureToken implements IGetToken<IVorbisPicture> {
     const indexed_color = Token.UINT32_BE.get(buffer, offset += 4);
 
     const picDataLen = Token.UINT32_BE.get(buffer, offset += 4);
-    const data = Buffer.from(buffer.slice(offset += 4, offset + picDataLen));
+    const data = Uint8Array.from(buffer.slice(offset += 4, offset + picDataLen));
 
     return {
       type,

lib/ogg/vorbis/VorbisDecoder.ts

@@ -13,7 +13,7 @@ export class VorbisDecoder {
 
   public readStringUtf8(): string {
     const len = this.readInt32();
-    const value = Buffer.from(this.data).toString('utf-8', this.offset, this.offset + len);
+    const value = new TextDecoder('utf-8').decode(this.data.subarray(this.offset, this.offset + len));
     this.offset += len;
     return value;
   }