ssa bold and italic

demos/main/src/main/assets/media.exolist.json

@@ -507,6 +507,13 @@
         "subtitle_language": "en"
       },
       {
+        "name": "SubStation Alpha Style",
+        "uri": "https://storage.googleapis.com/exoplayer-test-media-1/gen-3/screens/dash-vod-single-segment/video-avc-baseline-480.mp4",
+        "subtitle_uri": "https://drive.google.com/uc?export=download&id=16IrvtynQ6-ANRpRX7hU6xEQeFU91LmXl",
+        "subtitle_mime_type": "text/x-ssa",
+        "subtitle_language": "en"
+      },
+      {
         "name": "MPEG-4 Timed Text",
         "uri": "https://storage.googleapis.com/exoplayer-test-media-1/mp4/dizzy-with-tx3g.mp4"
       }

library/core/src/main/java/com/google/android/exoplayer2/text/ssa/SsaDecoder.java

@@ -18,9 +18,11 @@ package com.google.android.exoplayer2.text.ssa;
 import static com.google.android.exoplayer2.text.Cue.LINE_TYPE_FRACTION;
 import static com.google.android.exoplayer2.util.Util.castNonNull;
 
+import android.graphics.Typeface;
 import android.text.Layout;
 import android.text.SpannableString;
 import android.text.style.ForegroundColorSpan;
+import android.text.style.StyleSpan;
 import androidx.annotation.Nullable;
 import com.google.android.exoplayer2.C;
 import com.google.android.exoplayer2.text.Cue;
@@ -319,6 +321,27 @@ public final class SsaDecoder extends SimpleSubtitleDecoder {
             style.fontSize / screenHeight,
             Cue.TEXT_SIZE_TYPE_FRACTIONAL_IGNORE_PADDING);
       }
+      if (style.bold && style.italic) {
+        spannableText.setSpan(
+            new StyleSpan(Typeface.BOLD_ITALIC),
+            0,
+            spannableText.length(),
+            SpannableString.SPAN_EXCLUSIVE_EXCLUSIVE);
+      }
+      else if(style.bold){
+        spannableText.setSpan(
+            new StyleSpan(Typeface.BOLD),
+            0,
+            spannableText.length(),
+            SpannableString.SPAN_EXCLUSIVE_EXCLUSIVE);
+      }
+      else if(style.italic){
+        spannableText.setSpan(
+            new StyleSpan(Typeface.ITALIC),
+            0,
+            spannableText.length(),
+            SpannableString.SPAN_EXCLUSIVE_EXCLUSIVE);
+      }
     }
 
     @SsaStyle.SsaAlignment int alignment;

library/core/src/main/java/com/google/android/exoplayer2/text/ssa/SsaStyle.java

@@ -92,16 +92,22 @@ import java.util.regex.Pattern;
   @SsaAlignment public final int alignment;
   @Nullable @ColorInt public final Integer primaryColor;
   public final float fontSize;
+  public final boolean bold;
+  public final boolean italic;
 
   private SsaStyle(
       String name,
       @SsaAlignment int alignment,
       @Nullable @ColorInt Integer primaryColor,
-      float fontSize) {
+      float fontSize,
+      boolean bold,
+      boolean italic) {
     this.name = name;
     this.alignment = alignment;
     this.primaryColor = primaryColor;
     this.fontSize = fontSize;
+    this.bold = bold;
+    this.italic = italic;
   }
 
   @Nullable
@@ -121,7 +127,9 @@ import java.util.regex.Pattern;
           styleValues[format.nameIndex].trim(),
           parseAlignment(styleValues[format.alignmentIndex].trim()),
           parseColor(styleValues[format.primaryColorIndex].trim()),
-          parseFontSize(styleValues[format.fontSizeIndex].trim()));
+          parseFontSize(styleValues[format.fontSizeIndex].trim()),
+          parseBold(styleValues[format.boldIndex].trim()),
+          parseItalic(styleValues[format.italicIndex].trim()));
     } catch (RuntimeException e) {
       Log.w(TAG, "Skipping malformed 'Style:' line: '" + styleLine + "'", e);
       return null;
@@ -207,6 +215,36 @@ import java.util.regex.Pattern;
     }
   }
 
+  private static boolean parseBold(String bold) {
+    try {
+      int boldFlag = Integer.parseInt(bold);
+      if(boldFlag == 1 || boldFlag == -1){
+        return true;
+      }
+      else{
+        return false;
+      }
+    } catch (NumberFormatException e) {
+      Log.w(TAG, "Failed to parse bold: '" + bold + "'", e);
+      return false;
+    }
+  }
+
+  private static boolean parseItalic(String italic) {
+    try {
+      int italicFlag = Integer.parseInt(italic);
+      if(italicFlag == 1 || italicFlag == -1){
+        return true;
+      }
+      else{
+        return false;
+      }
+    } catch (NumberFormatException e) {
+      Log.w(TAG, "Failed to parse italic: '" + italic + "'", e);
+      return false;
+    }
+  }
+
   /**
    * Represents a {@code Format:} line from the {@code [V4+ Styles]} section
    *
@@ -219,6 +257,8 @@ import java.util.regex.Pattern;
     public final int alignmentIndex;
     public final int primaryColorIndex;
     public final int fontSizeIndex;
+    public final int boldIndex;
+    public final int italicIndex;
     public final int length;
 
     private Format(
@@ -226,11 +266,15 @@ import java.util.regex.Pattern;
         int alignmentIndex,
         int primaryColorIndex,
         int fontSizeIndex,
+        int boldIndex,
+        int italicIndex,
         int length) {
       this.nameIndex = nameIndex;
       this.alignmentIndex = alignmentIndex;
       this.primaryColorIndex = primaryColorIndex;
       this.fontSizeIndex = fontSizeIndex;
+      this.boldIndex = boldIndex;
+      this.italicIndex = italicIndex;
       this.length = length;
     }
 
@@ -245,6 +289,8 @@ import java.util.regex.Pattern;
       int alignmentIndex = C.INDEX_UNSET;
       int primaryColorIndex = C.INDEX_UNSET;
       int fontSizeIndex = C.INDEX_UNSET;
+      int boldIndex = C.INDEX_UNSET;
+      int italicIndex = C.INDEX_UNSET;
       String[] keys =
           TextUtils.split(styleFormatLine.substring(SsaDecoder.FORMAT_LINE_PREFIX.length()), ",");
       for (int i = 0; i < keys.length; i++) {
@@ -261,10 +307,16 @@ import java.util.regex.Pattern;
           case "fontsize":
             fontSizeIndex = i;
             break;
+          case "bold":
+            boldIndex = i;
+            break;
+          case "italic":
+            italicIndex = i;
+            break;
         }
       }
       return nameIndex != C.INDEX_UNSET
-          ? new Format(nameIndex, alignmentIndex, primaryColorIndex, fontSizeIndex, keys.length)
+          ? new Format(nameIndex, alignmentIndex, primaryColorIndex, fontSizeIndex, boldIndex, italicIndex, keys.length)
           : null;
     }
   }

library/core/src/test/java/com/google/android/exoplayer2/text/ssa/SsaDecoderTest.java

@@ -19,6 +19,7 @@ import static com.google.common.truth.Truth.assertThat;
 import static com.google.common.truth.Truth.assertWithMessage;
 
 import android.graphics.Color;
+import android.graphics.Typeface;
 import android.text.Layout;
 import android.text.Spanned;
 import androidx.test.core.app.ApplicationProvider;
@@ -49,6 +50,7 @@ public final class SsaDecoderTest {
   private static final String POSITIONS_WITHOUT_PLAYRES = "media/ssa/positioning_without_playres";
   private static final String STYLE_COLORS = "media/ssa/style_colors";
   private static final String STYLE_FONT_SIZE = "media/ssa/style_font_size";
+  private static final String STYLE_BOLD_ITALIC = "media/ssa/style_bold_italic";
 
   @Test
   public void decodeEmpty() throws IOException {
@@ -335,6 +337,24 @@ public final class SsaDecoderTest {
     assertThat(secondCue.textSizeType).isEqualTo(Cue.TEXT_SIZE_TYPE_FRACTIONAL_IGNORE_PADDING);
   }
 
+  @Test
+  public void decodeBoldItalic() throws IOException{
+    SsaDecoder decoder = new SsaDecoder();
+    byte[] bytes = TestUtil.getByteArray(ApplicationProvider.getApplicationContext(), STYLE_BOLD_ITALIC);
+    Subtitle subtitle = decoder.decode(bytes, bytes.length, false);
+    assertThat(subtitle.getEventTimeCount()).isEqualTo(6);
+
+    Spanned firstCueText =
+        (Spanned) Iterables.getOnlyElement(subtitle.getCues(subtitle.getEventTime(0))).text;
+    SpannedSubject.assertThat(firstCueText).hasBoldSpanBetween(0, firstCueText.length());
+    Spanned secondCueText =
+        (Spanned) Iterables.getOnlyElement(subtitle.getCues(subtitle.getEventTime(2))).text;
+    SpannedSubject.assertThat(secondCueText).hasItalicSpanBetween(0, secondCueText.length());
+    Spanned thirdCueText =
+        (Spanned) Iterables.getOnlyElement(subtitle.getCues(subtitle.getEventTime(4))).text;
+    SpannedSubject.assertThat(thirdCueText).hasBoldItalicSpanBetween(0, thirdCueText.length());
+  }
+
   private static void assertTypicalCue1(Subtitle subtitle, int eventIndex) {
     assertThat(subtitle.getEventTime(eventIndex)).isEqualTo(0);
     assertThat(subtitle.getCues(subtitle.getEventTime(eventIndex)).get(0).text.toString())

testdata/src/test/assets/media/ssa/style_bold_italic

@@ -9,11 +9,12 @@ PlayResY: 720
 Format: Name, Fontname, Fontsize, PrimaryColour, SecondaryColour, OutlineColour, BackColour, Bold, Italic, Underline, StrikeOut, ScaleX, ScaleY, Spacing, Angle, BorderStyle, Outline, Shadow, Alignment, MarginL, MarginR, MarginV, Encoding
 Style: FontBold        ,Roboto,50,&H000000FF,&H000000FF,&H00000000,&H00000000,-1,0,0,0,100,100,0,0,1,3,0,2,50,50,70,1
 Style: FontItalic      ,Roboto,50,&H000000FF,&H000000FF,&H00000000,&H00000000,0,-1,0,0,100,100,0,0,1,3,0,2,50,50,70,1
-Style: FontItalic      ,Roboto,50,&H000000FF,&H000000FF,&H00000000,&H00000000,-1,-1,0,0,100,100,0,0,1,3,0,2,50,50,70,1
+Style: FontBoldItalic  ,Roboto,50,&H000000FF,&H000000FF,&H00000000,&H00000000,-1,-1,0,0,100,100,0,0,1,3,0,2,50,50,70,1
 
 
 
 [Events]
 Format: Layer, Start, End, Style, Name, MarginL, MarginR, MarginV, Effect, Text
-Dialogue: 0,0:00:00.95,0:00:03.11,FontSizeSmall      ,Arnold,0,0,0,,First line with font size 30.
-Dialogue: 0,0:00:08.50,0:00:11.50,FontSizeBig        ,Arnold,0,0,0,,Second line with font size 72.2.
\ No newline at end of file
+Dialogue: 0,0:00:01.00,0:00:03.00,FontBold          ,Abel,0,0,0,,First line with Bold.
+Dialogue: 0,0:00:05.00,0:00:07.00,FontItalic        ,Abel,0,0,0,,Second line with Italic.
+Dialogue: 0,0:00:09.00,0:00:11.00,FontBoldItalic    ,Abel,0,0,0,,Third line with Bold Italic.
\ No newline at end of file