Move Util.getErrorCodeFromPlatformDiagnosticsInfo into common

Will be needed for error code assignment.

PiperOrigin-RevId: 382305328

library/common/src/main/java/com/google/android/exoplayer2/util/Util.java

@@ -145,6 +145,9 @@ public final class Util {
               + "(T(([0-9]*)H)?(([0-9]*)M)?(([0-9.]*)S)?)?$");
               + "(T(([0-9]*)H)?(([0-9]*)M)?(([0-9.]*)S)?)?$");
   private static final Pattern ESCAPED_CHARACTER_PATTERN = Pattern.compile("%([A-Fa-f0-9]{2})");
   private static final Pattern ESCAPED_CHARACTER_PATTERN = Pattern.compile("%([A-Fa-f0-9]{2})");
 
 
+  /** Pattern to extract error code from platform diagnostics info. */
+  private static final Pattern DIAGNOSTIC_INFO_CODE_PATTERN = Pattern.compile(".*?_(neg_|)(\\d+)");
+
   // https://docs.microsoft.com/en-us/azure/media-services/previous/media-services-deliver-content-overview#URLs.
   // https://docs.microsoft.com/en-us/azure/media-services/previous/media-services-deliver-content-overview#URLs.
   private static final Pattern ISM_URL_PATTERN = Pattern.compile(".*\\.isml?(?:/(manifest(.*))?)?");
   private static final Pattern ISM_URL_PATTERN = Pattern.compile(".*\\.isml?(?:/(manifest(.*))?)?");
   private static final String ISM_HLS_FORMAT_EXTENSION = "format=m3u8-aapl";
   private static final String ISM_HLS_FORMAT_EXTENSION = "format=m3u8-aapl";
@@ -2377,6 +2380,26 @@ public final class Util {
     return count > 0;
     return count > 0;
   }
   }
 
 
+  /**
+   * Attempts to parse an error code from a diagnostic string found in framework media exceptions.
+   * For example: android.media.MediaCodec.error_1 or android.media.MediaDrm.error_neg_2.
+   */
+  public static int getErrorCodeFromPlatformDiagnosticsInfo(@Nullable String diagnosticsInfo) {
+    if (diagnosticsInfo == null) {
+      return 0;
+    }
+    Matcher matcher = DIAGNOSTIC_INFO_CODE_PATTERN.matcher(diagnosticsInfo);
+    if (!matcher.matches()) {
+      return 0;
+    }
+    try {
+      int errorCode = Integer.parseInt(Assertions.checkNotNull(matcher.group(2)));
+      return Assertions.checkNotNull(matcher.group(1)).isEmpty() ? errorCode : -errorCode;
+    } catch (NumberFormatException e) {
+      return 0;
+    }
+  }
+
   @Nullable
   @Nullable
   private static String getSystemProperty(String name) {
   private static String getSystemProperty(String name) {
     try {
     try {