Java Code Examples for com.google.android.exoplayer2.text.webvtt.WebvttParserUtil#validateWebvttHeaderLine()

The following examples show how to use com.google.android.exoplayer2.text.webvtt.WebvttParserUtil#validateWebvttHeaderLine() . You can vote up the ones you like or vote down the ones you don't like, and go to the original project or source file by following the links above each example. You may check out the related API usage on the sidebar.

Example 1

Source File: WebvttDecoder.java From no-player with Apache License 2.0

5 votes

@Override
protected WebvttSubtitle decode(byte[] bytes, int length, boolean reset)
    throws SubtitleDecoderException {
  parsableWebvttData.reset(bytes, length);
  // Initialization for consistent starting state.
  webvttCueBuilder.reset();
  definedStyles.clear();

  // Validate the first line of the header, and skip the remainder.
  try {
    WebvttParserUtil.validateWebvttHeaderLine(parsableWebvttData);
  } catch (ParserException e) {
    throw new SubtitleDecoderException(e);
  }
  while (!TextUtils.isEmpty(parsableWebvttData.readLine())) {
  }

  int event;
  ArrayList<WebvttCue> subtitles = new ArrayList<>();
  while ((event = getNextEvent(parsableWebvttData)) != EVENT_END_OF_FILE) {
    if (event == EVENT_COMMENT) {
      skipComment(parsableWebvttData);
    } else if (event == EVENT_STYLE_BLOCK) {
      if (!subtitles.isEmpty()) {
        throw new SubtitleDecoderException("A style block was found after the first cue.");
      }
      parsableWebvttData.readLine(); // Consume the "STYLE" header.
      WebvttCssStyle styleBlock = cssParser.parseBlock(parsableWebvttData);
      if (styleBlock != null) {
        definedStyles.add(styleBlock);
      }
    } else if (event == EVENT_CUE) {
      if (cueParser.parseCue(parsableWebvttData, webvttCueBuilder, definedStyles)) {
        subtitles.add(webvttCueBuilder.build());
        webvttCueBuilder.reset();
      }
    }
  }
  return new WebvttSubtitle(subtitles);
}

Example 2

Source File: WebvttExtractor.java From MediaSDK with Apache License 2.0

4 votes

@RequiresNonNull("output")
private void processSample() throws ParserException {
  ParsableByteArray webvttData = new ParsableByteArray(sampleData);

  // Validate the first line of the header.
  WebvttParserUtil.validateWebvttHeaderLine(webvttData);

  // Defaults to use if the header doesn't contain an X-TIMESTAMP-MAP header.
  long vttTimestampUs = 0;
  long tsTimestampUs = 0;

  // Parse the remainder of the header looking for X-TIMESTAMP-MAP.
  for (String line = webvttData.readLine();
      !TextUtils.isEmpty(line);
      line = webvttData.readLine()) {
    if (line.startsWith("X-TIMESTAMP-MAP")) {
      Matcher localTimestampMatcher = LOCAL_TIMESTAMP.matcher(line);
      if (!localTimestampMatcher.find()) {
        throw new ParserException("X-TIMESTAMP-MAP doesn't contain local timestamp: " + line);
      }
      Matcher mediaTimestampMatcher = MEDIA_TIMESTAMP.matcher(line);
      if (!mediaTimestampMatcher.find()) {
        throw new ParserException("X-TIMESTAMP-MAP doesn't contain media timestamp: " + line);
      }
      vttTimestampUs = WebvttParserUtil.parseTimestampUs(localTimestampMatcher.group(1));
      tsTimestampUs = TimestampAdjuster.ptsToUs(Long.parseLong(mediaTimestampMatcher.group(1)));
    }
  }

  // Find the first cue header and parse the start time.
  Matcher cueHeaderMatcher = WebvttParserUtil.findNextCueHeader(webvttData);
  if (cueHeaderMatcher == null) {
    // No cues found. Don't output a sample, but still output a corresponding track.
    buildTrackOutput(0);
    return;
  }

  long firstCueTimeUs = WebvttParserUtil.parseTimestampUs(cueHeaderMatcher.group(1));
  long sampleTimeUs = timestampAdjuster.adjustTsTimestamp(
      TimestampAdjuster.usToPts(firstCueTimeUs + tsTimestampUs - vttTimestampUs));
  long subsampleOffsetUs = sampleTimeUs - firstCueTimeUs;
  // Output the track.
  TrackOutput trackOutput = buildTrackOutput(subsampleOffsetUs);
  // Output the sample.
  sampleDataWrapper.reset(sampleData, sampleSize);
  trackOutput.sampleData(sampleDataWrapper, sampleSize);
  trackOutput.sampleMetadata(sampleTimeUs, C.BUFFER_FLAG_KEY_FRAME, sampleSize, 0, null);
}

Example 3

Source File: WebvttExtractor.java From TelePlus-Android with GNU General Public License v2.0

4 votes

private void processSample() throws ParserException {
  ParsableByteArray webvttData = new ParsableByteArray(sampleData);

  // Validate the first line of the header.
  try {
    WebvttParserUtil.validateWebvttHeaderLine(webvttData);
  } catch (SubtitleDecoderException e) {
    throw new ParserException(e);
  }

  // Defaults to use if the header doesn't contain an X-TIMESTAMP-MAP header.
  long vttTimestampUs = 0;
  long tsTimestampUs = 0;

  // Parse the remainder of the header looking for X-TIMESTAMP-MAP.
  String line;
  while (!TextUtils.isEmpty(line = webvttData.readLine())) {
    if (line.startsWith("X-TIMESTAMP-MAP")) {
      Matcher localTimestampMatcher = LOCAL_TIMESTAMP.matcher(line);
      if (!localTimestampMatcher.find()) {
        throw new ParserException("X-TIMESTAMP-MAP doesn't contain local timestamp: " + line);
      }
      Matcher mediaTimestampMatcher = MEDIA_TIMESTAMP.matcher(line);
      if (!mediaTimestampMatcher.find()) {
        throw new ParserException("X-TIMESTAMP-MAP doesn't contain media timestamp: " + line);
      }
      vttTimestampUs = WebvttParserUtil.parseTimestampUs(localTimestampMatcher.group(1));
      tsTimestampUs = TimestampAdjuster.ptsToUs(Long.parseLong(mediaTimestampMatcher.group(1)));
    }
  }

  // Find the first cue header and parse the start time.
  Matcher cueHeaderMatcher = WebvttParserUtil.findNextCueHeader(webvttData);
  if (cueHeaderMatcher == null) {
    // No cues found. Don't output a sample, but still output a corresponding track.
    buildTrackOutput(0);
    return;
  }

  long firstCueTimeUs = WebvttParserUtil.parseTimestampUs(cueHeaderMatcher.group(1));
  long sampleTimeUs = timestampAdjuster.adjustTsTimestamp(
      TimestampAdjuster.usToPts(firstCueTimeUs + tsTimestampUs - vttTimestampUs));
  long subsampleOffsetUs = sampleTimeUs - firstCueTimeUs;
  // Output the track.
  TrackOutput trackOutput = buildTrackOutput(subsampleOffsetUs);
  // Output the sample.
  sampleDataWrapper.reset(sampleData, sampleSize);
  trackOutput.sampleData(sampleDataWrapper, sampleSize);
  trackOutput.sampleMetadata(sampleTimeUs, C.BUFFER_FLAG_KEY_FRAME, sampleSize, 0, null);
}

Example 4

Source File: WebvttExtractor.java From TelePlus-Android with GNU General Public License v2.0

4 votes

private void processSample() throws ParserException {
  ParsableByteArray webvttData = new ParsableByteArray(sampleData);

  // Validate the first line of the header.
  try {
    WebvttParserUtil.validateWebvttHeaderLine(webvttData);
  } catch (SubtitleDecoderException e) {
    throw new ParserException(e);
  }

  // Defaults to use if the header doesn't contain an X-TIMESTAMP-MAP header.
  long vttTimestampUs = 0;
  long tsTimestampUs = 0;

  // Parse the remainder of the header looking for X-TIMESTAMP-MAP.
  String line;
  while (!TextUtils.isEmpty(line = webvttData.readLine())) {
    if (line.startsWith("X-TIMESTAMP-MAP")) {
      Matcher localTimestampMatcher = LOCAL_TIMESTAMP.matcher(line);
      if (!localTimestampMatcher.find()) {
        throw new ParserException("X-TIMESTAMP-MAP doesn't contain local timestamp: " + line);
      }
      Matcher mediaTimestampMatcher = MEDIA_TIMESTAMP.matcher(line);
      if (!mediaTimestampMatcher.find()) {
        throw new ParserException("X-TIMESTAMP-MAP doesn't contain media timestamp: " + line);
      }
      vttTimestampUs = WebvttParserUtil.parseTimestampUs(localTimestampMatcher.group(1));
      tsTimestampUs = TimestampAdjuster.ptsToUs(Long.parseLong(mediaTimestampMatcher.group(1)));
    }
  }

  // Find the first cue header and parse the start time.
  Matcher cueHeaderMatcher = WebvttParserUtil.findNextCueHeader(webvttData);
  if (cueHeaderMatcher == null) {
    // No cues found. Don't output a sample, but still output a corresponding track.
    buildTrackOutput(0);
    return;
  }

  long firstCueTimeUs = WebvttParserUtil.parseTimestampUs(cueHeaderMatcher.group(1));
  long sampleTimeUs = timestampAdjuster.adjustTsTimestamp(
      TimestampAdjuster.usToPts(firstCueTimeUs + tsTimestampUs - vttTimestampUs));
  long subsampleOffsetUs = sampleTimeUs - firstCueTimeUs;
  // Output the track.
  TrackOutput trackOutput = buildTrackOutput(subsampleOffsetUs);
  // Output the sample.
  sampleDataWrapper.reset(sampleData, sampleSize);
  trackOutput.sampleData(sampleDataWrapper, sampleSize);
  trackOutput.sampleMetadata(sampleTimeUs, C.BUFFER_FLAG_KEY_FRAME, sampleSize, 0, null);
}

Example 5

Source File: WebvttExtractor.java From K-Sonic with MIT License

4 votes

private void processSample() throws ParserException {
  ParsableByteArray webvttData = new ParsableByteArray(sampleData);

  // Validate the first line of the header.
  try {
    WebvttParserUtil.validateWebvttHeaderLine(webvttData);
  } catch (SubtitleDecoderException e) {
    throw new ParserException(e);
  }

  // Defaults to use if the header doesn't contain an X-TIMESTAMP-MAP header.
  long vttTimestampUs = 0;
  long tsTimestampUs = 0;

  // Parse the remainder of the header looking for X-TIMESTAMP-MAP.
  String line;
  while (!TextUtils.isEmpty(line = webvttData.readLine())) {
    if (line.startsWith("X-TIMESTAMP-MAP")) {
      Matcher localTimestampMatcher = LOCAL_TIMESTAMP.matcher(line);
      if (!localTimestampMatcher.find()) {
        throw new ParserException("X-TIMESTAMP-MAP doesn't contain local timestamp: " + line);
      }
      Matcher mediaTimestampMatcher = MEDIA_TIMESTAMP.matcher(line);
      if (!mediaTimestampMatcher.find()) {
        throw new ParserException("X-TIMESTAMP-MAP doesn't contain media timestamp: " + line);
      }
      vttTimestampUs = WebvttParserUtil.parseTimestampUs(localTimestampMatcher.group(1));
      tsTimestampUs = TimestampAdjuster.ptsToUs(
          Long.parseLong(mediaTimestampMatcher.group(1)));
    }
  }

  // Find the first cue header and parse the start time.
  Matcher cueHeaderMatcher = WebvttParserUtil.findNextCueHeader(webvttData);
  if (cueHeaderMatcher == null) {
    // No cues found. Don't output a sample, but still output a corresponding track.
    buildTrackOutput(0);
    return;
  }

  long firstCueTimeUs = WebvttParserUtil.parseTimestampUs(cueHeaderMatcher.group(1));
  long sampleTimeUs = timestampAdjuster.adjustSampleTimestamp(
      firstCueTimeUs + tsTimestampUs - vttTimestampUs);
  long subsampleOffsetUs = sampleTimeUs - firstCueTimeUs;
  // Output the track.
  TrackOutput trackOutput = buildTrackOutput(subsampleOffsetUs);
  // Output the sample.
  sampleDataWrapper.reset(sampleData, sampleSize);
  trackOutput.sampleData(sampleDataWrapper, sampleSize);
  trackOutput.sampleMetadata(sampleTimeUs, C.BUFFER_FLAG_KEY_FRAME, sampleSize, 0, null);
}

Example 6

Source File: WebvttExtractor.java From Telegram-FOSS with GNU General Public License v2.0

4 votes

private void processSample() throws ParserException {
  ParsableByteArray webvttData = new ParsableByteArray(sampleData);

  // Validate the first line of the header.
  WebvttParserUtil.validateWebvttHeaderLine(webvttData);

  // Defaults to use if the header doesn't contain an X-TIMESTAMP-MAP header.
  long vttTimestampUs = 0;
  long tsTimestampUs = 0;

  // Parse the remainder of the header looking for X-TIMESTAMP-MAP.
  String line;
  while (!TextUtils.isEmpty(line = webvttData.readLine())) {
    if (line.startsWith("X-TIMESTAMP-MAP")) {
      Matcher localTimestampMatcher = LOCAL_TIMESTAMP.matcher(line);
      if (!localTimestampMatcher.find()) {
        throw new ParserException("X-TIMESTAMP-MAP doesn't contain local timestamp: " + line);
      }
      Matcher mediaTimestampMatcher = MEDIA_TIMESTAMP.matcher(line);
      if (!mediaTimestampMatcher.find()) {
        throw new ParserException("X-TIMESTAMP-MAP doesn't contain media timestamp: " + line);
      }
      vttTimestampUs = WebvttParserUtil.parseTimestampUs(localTimestampMatcher.group(1));
      tsTimestampUs = TimestampAdjuster.ptsToUs(Long.parseLong(mediaTimestampMatcher.group(1)));
    }
  }

  // Find the first cue header and parse the start time.
  Matcher cueHeaderMatcher = WebvttParserUtil.findNextCueHeader(webvttData);
  if (cueHeaderMatcher == null) {
    // No cues found. Don't output a sample, but still output a corresponding track.
    buildTrackOutput(0);
    return;
  }

  long firstCueTimeUs = WebvttParserUtil.parseTimestampUs(cueHeaderMatcher.group(1));
  long sampleTimeUs = timestampAdjuster.adjustTsTimestamp(
      TimestampAdjuster.usToPts(firstCueTimeUs + tsTimestampUs - vttTimestampUs));
  long subsampleOffsetUs = sampleTimeUs - firstCueTimeUs;
  // Output the track.
  TrackOutput trackOutput = buildTrackOutput(subsampleOffsetUs);
  // Output the sample.
  sampleDataWrapper.reset(sampleData, sampleSize);
  trackOutput.sampleData(sampleDataWrapper, sampleSize);
  trackOutput.sampleMetadata(sampleTimeUs, C.BUFFER_FLAG_KEY_FRAME, sampleSize, 0, null);
}

Example 7

Source File: WebvttExtractor.java From Telegram with GNU General Public License v2.0

4 votes

private void processSample() throws ParserException {
  ParsableByteArray webvttData = new ParsableByteArray(sampleData);

  // Validate the first line of the header.
  WebvttParserUtil.validateWebvttHeaderLine(webvttData);

  // Defaults to use if the header doesn't contain an X-TIMESTAMP-MAP header.
  long vttTimestampUs = 0;
  long tsTimestampUs = 0;

  // Parse the remainder of the header looking for X-TIMESTAMP-MAP.
  String line;
  while (!TextUtils.isEmpty(line = webvttData.readLine())) {
    if (line.startsWith("X-TIMESTAMP-MAP")) {
      Matcher localTimestampMatcher = LOCAL_TIMESTAMP.matcher(line);
      if (!localTimestampMatcher.find()) {
        throw new ParserException("X-TIMESTAMP-MAP doesn't contain local timestamp: " + line);
      }
      Matcher mediaTimestampMatcher = MEDIA_TIMESTAMP.matcher(line);
      if (!mediaTimestampMatcher.find()) {
        throw new ParserException("X-TIMESTAMP-MAP doesn't contain media timestamp: " + line);
      }
      vttTimestampUs = WebvttParserUtil.parseTimestampUs(localTimestampMatcher.group(1));
      tsTimestampUs = TimestampAdjuster.ptsToUs(Long.parseLong(mediaTimestampMatcher.group(1)));
    }
  }

  // Find the first cue header and parse the start time.
  Matcher cueHeaderMatcher = WebvttParserUtil.findNextCueHeader(webvttData);
  if (cueHeaderMatcher == null) {
    // No cues found. Don't output a sample, but still output a corresponding track.
    buildTrackOutput(0);
    return;
  }

  long firstCueTimeUs = WebvttParserUtil.parseTimestampUs(cueHeaderMatcher.group(1));
  long sampleTimeUs = timestampAdjuster.adjustTsTimestamp(
      TimestampAdjuster.usToPts(firstCueTimeUs + tsTimestampUs - vttTimestampUs));
  long subsampleOffsetUs = sampleTimeUs - firstCueTimeUs;
  // Output the track.
  TrackOutput trackOutput = buildTrackOutput(subsampleOffsetUs);
  // Output the sample.
  sampleDataWrapper.reset(sampleData, sampleSize);
  trackOutput.sampleData(sampleDataWrapper, sampleSize);
  trackOutput.sampleMetadata(sampleTimeUs, C.BUFFER_FLAG_KEY_FRAME, sampleSize, 0, null);
}