Speed up chapter parsing

core/src/main/java/de/danoeh/antennapod/core/feed/LocalFeedUpdater.java

@@ -9,6 +9,7 @@ import android.util.Log;
 import androidx.annotation.NonNull;
 import androidx.annotation.Nullable;
 
+import java.io.BufferedInputStream;
 import java.io.IOException;
 import java.io.InputStream;
 import java.text.ParseException;
@@ -218,7 +219,8 @@ public class LocalFeedUpdater {
         mediaMetadataRetriever.close();
 
         try (InputStream inputStream = context.getContentResolver().openInputStream(file.getUri())) {
-            Id3MetadataReader reader = new Id3MetadataReader(new CountingInputStream(inputStream));
+            Id3MetadataReader reader = new Id3MetadataReader(
+                    new CountingInputStream(new BufferedInputStream(inputStream)));
             reader.readInputStream();
             item.setDescriptionIfLonger(reader.getComment());
         } catch (IOException | ID3ReaderException e) {

core/src/main/java/de/danoeh/antennapod/core/util/ChapterUtils.java

@@ -23,6 +23,7 @@ import okhttp3.Request;
 import okhttp3.Response;
 import org.apache.commons.io.input.CountingInputStream;
 
+import java.io.BufferedInputStream;
 import java.io.File;
 import java.io.FileInputStream;
 import java.io.IOException;
@@ -120,17 +121,17 @@ public class ChapterUtils {
             if (!source.exists()) {
                 throw new IOException("Local file does not exist");
             }
-            return new CountingInputStream(new FileInputStream(source));
+            return new CountingInputStream(new BufferedInputStream(new FileInputStream(source)));
         } else if (playable.getStreamUrl().startsWith(ContentResolver.SCHEME_CONTENT)) {
             Uri uri = Uri.parse(playable.getStreamUrl());
-            return new CountingInputStream(context.getContentResolver().openInputStream(uri));
+            return new CountingInputStream(new BufferedInputStream(context.getContentResolver().openInputStream(uri)));
         } else {
             Request request = new Request.Builder().url(playable.getStreamUrl()).build();
             Response response = AntennapodHttpClient.getHttpClient().newCall(request).execute();
             if (response.body() == null) {
                 throw new IOException("Body is null");
             }
-            return new CountingInputStream(response.body().byteStream());
+            return new CountingInputStream(new BufferedInputStream(response.body().byteStream()));
         }
     }
 
@@ -171,7 +172,7 @@ public class ChapterUtils {
 
     @NonNull
     private static List<Chapter> readOggChaptersFromInputStream(InputStream input) throws VorbisCommentReaderException {
-        VorbisCommentChapterReader reader = new VorbisCommentChapterReader(input);
+        VorbisCommentChapterReader reader = new VorbisCommentChapterReader(new BufferedInputStream(input));
         reader.readInputStream();
         List<Chapter> chapters = reader.getChapters();
         if (chapters == null) {

parser/media/src/main/java/de/danoeh/antennapod/parser/media/id3/ID3Reader.java

@@ -46,7 +46,7 @@ public class ID3Reader {
     }
 
     protected void readFrame(@NonNull FrameHeader frameHeader) throws IOException, ID3ReaderException {
-        Log.d(TAG, "Skipping frame: " + frameHeader.toString());
+        Log.d(TAG, "Skipping frame: " + frameHeader.getId() + ", size: " + frameHeader.getSize());
         skipBytes(frameHeader.getSize());
     }
 
@@ -106,7 +106,7 @@ public class ID3Reader {
 
     @NonNull
     FrameHeader readFrameHeader() throws IOException {
-        String id = readIsoStringFixed(FRAME_ID_LENGTH);
+        String id = readPlainBytesToString(FRAME_ID_LENGTH);
         int size = readInt();
         if (tagHeader != null && tagHeader.getVersion() >= 0x0400) {
             size = unsynchsafe(size);
@@ -136,15 +136,14 @@ public class ID3Reader {
         return readEncodedString(encoding, max - 1);
     }
 
-    @SuppressWarnings("CharsetObjectCanBeUsed")
+    protected String readPlainBytesToString(int length) throws IOException {
-    protected String readIsoStringFixed(int length) throws IOException {
+        StringBuilder stringBuilder = new StringBuilder();
-        ByteArrayOutputStream bytes = new ByteArrayOutputStream();
         int bytesRead = 0;
         while (bytesRead < length) {
-            bytes.write(readByte());
+            stringBuilder.append((char) readByte());
             bytesRead++;
         }
-        return Charset.forName("ISO-8859-1").newDecoder().decode(ByteBuffer.wrap(bytes.toByteArray())).toString();
+        return stringBuilder.toString();
     }
 
     protected String readIsoStringNullTerminated(int max) throws IOException {

parser/media/src/main/java/de/danoeh/antennapod/parser/media/id3/model/FrameHeader.java

@@ -1,18 +1,7 @@
 package de.danoeh.antennapod.parser.media.id3.model;
 
-import androidx.annotation.NonNull;
-
 public class FrameHeader extends Header {
-    private final short flags;
-
     public FrameHeader(String id, int size, short flags) {
         super(id, size);
-        this.flags = flags;
-    }
-
-    @Override
-    @NonNull
-    public String toString() {
-        return String.format("FrameHeader [flags=%s, id=%s, size=%s]", Integer.toBinaryString(flags), id, size);
     }
 }