Java Code Examples for com.google.android.exoplayer2.util.CodecSpecificDataUtil#buildAacAudioSpecificConfig()

The following examples show how to use com.google.android.exoplayer2.util.CodecSpecificDataUtil#buildAacAudioSpecificConfig() . 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: AdtsReader.java    From MediaSDK with Apache License 2.0 4 votes vote down vote up 
/**
 * Parses the sample header.
 */
private void parseAdtsHeader() throws ParserException {
  adtsScratch.setPosition(0);

  if (!hasOutputFormat) {
    int audioObjectType = adtsScratch.readBits(2) + 1;
    if (audioObjectType != 2) {
      // The stream indicates AAC-Main (1), AAC-SSR (3) or AAC-LTP (4). When the stream indicates
      // AAC-Main it's more likely that the stream contains HE-AAC (5), which cannot be
      // represented correctly in the 2 bit audio_object_type field in the ADTS header. In
      // practice when the stream indicates AAC-SSR or AAC-LTP it more commonly contains AAC-LC or
      // HE-AAC. Since most Android devices don't support AAC-Main, AAC-SSR or AAC-LTP, and since
      // indicating AAC-LC works for HE-AAC streams, we pretend that we're dealing with AAC-LC and
      // hope for the best. In practice this often works.
      // See: https://github.com/google/ExoPlayer/issues/774
      // See: https://github.com/google/ExoPlayer/issues/1383
      Log.w(TAG, "Detected audio object type: " + audioObjectType + ", but assuming AAC LC.");
      audioObjectType = 2;
    }

    adtsScratch.skipBits(5);
    int channelConfig = adtsScratch.readBits(3);

    byte[] audioSpecificConfig =
        CodecSpecificDataUtil.buildAacAudioSpecificConfig(
            audioObjectType, firstFrameSampleRateIndex, channelConfig);
    Pair<Integer, Integer> audioParams = CodecSpecificDataUtil.parseAacAudioSpecificConfig(
        audioSpecificConfig);

    Format format = Format.createAudioSampleFormat(formatId, MimeTypes.AUDIO_AAC, null,
        Format.NO_VALUE, Format.NO_VALUE, audioParams.second, audioParams.first,
        Collections.singletonList(audioSpecificConfig), null, 0, language);
    // In this class a sample is an access unit, but the MediaFormat sample rate specifies the
    // number of PCM audio samples per second.
    sampleDurationUs = (C.MICROS_PER_SECOND * 1024) / format.sampleRate;
    output.format(format);
    hasOutputFormat = true;
  } else {
    adtsScratch.skipBits(10);
  }

  adtsScratch.skipBits(4);
  int sampleSize = adtsScratch.readBits(13) - 2 /* the sync word */ - HEADER_SIZE;
  if (hasCrc) {
    sampleSize -= CRC_SIZE;
  }

  setReadingSampleState(output, sampleDurationUs, 0, sampleSize);
}
Example 2
Source File: AdtsReader.java    From TelePlus-Android with GNU General Public License v2.0 4 votes vote down vote up 
/**
 * Parses the sample header.
 */
private void parseAdtsHeader() throws ParserException {
  adtsScratch.setPosition(0);

  if (!hasOutputFormat) {
    int audioObjectType = adtsScratch.readBits(2) + 1;
    if (audioObjectType != 2) {
      // The stream indicates AAC-Main (1), AAC-SSR (3) or AAC-LTP (4). When the stream indicates
      // AAC-Main it's more likely that the stream contains HE-AAC (5), which cannot be
      // represented correctly in the 2 bit audio_object_type field in the ADTS header. In
      // practice when the stream indicates AAC-SSR or AAC-LTP it more commonly contains AAC-LC or
      // HE-AAC. Since most Android devices don't support AAC-Main, AAC-SSR or AAC-LTP, and since
      // indicating AAC-LC works for HE-AAC streams, we pretend that we're dealing with AAC-LC and
      // hope for the best. In practice this often works.
      // See: https://github.com/google/ExoPlayer/issues/774
      // See: https://github.com/google/ExoPlayer/issues/1383
      Log.w(TAG, "Detected audio object type: " + audioObjectType + ", but assuming AAC LC.");
      audioObjectType = 2;
    }

    int sampleRateIndex = adtsScratch.readBits(4);
    adtsScratch.skipBits(1);
    int channelConfig = adtsScratch.readBits(3);

    byte[] audioSpecificConfig = CodecSpecificDataUtil.buildAacAudioSpecificConfig(
        audioObjectType, sampleRateIndex, channelConfig);
    Pair<Integer, Integer> audioParams = CodecSpecificDataUtil.parseAacAudioSpecificConfig(
        audioSpecificConfig);

    Format format = Format.createAudioSampleFormat(formatId, MimeTypes.AUDIO_AAC, null,
        Format.NO_VALUE, Format.NO_VALUE, audioParams.second, audioParams.first,
        Collections.singletonList(audioSpecificConfig), null, 0, language);
    // In this class a sample is an access unit, but the MediaFormat sample rate specifies the
    // number of PCM audio samples per second.
    sampleDurationUs = (C.MICROS_PER_SECOND * 1024) / format.sampleRate;
    output.format(format);
    hasOutputFormat = true;
  } else {
    adtsScratch.skipBits(10);
  }

  adtsScratch.skipBits(4);
  int sampleSize = adtsScratch.readBits(13) - 2 /* the sync word */ - HEADER_SIZE;
  if (hasCrc) {
    sampleSize -= CRC_SIZE;
  }

  setReadingSampleState(output, sampleDurationUs, 0, sampleSize);
}
Example 3
Source File: AdtsReader.java    From TelePlus-Android with GNU General Public License v2.0 4 votes vote down vote up 
/**
 * Parses the sample header.
 */
private void parseAdtsHeader() throws ParserException {
  adtsScratch.setPosition(0);

  if (!hasOutputFormat) {
    int audioObjectType = adtsScratch.readBits(2) + 1;
    if (audioObjectType != 2) {
      // The stream indicates AAC-Main (1), AAC-SSR (3) or AAC-LTP (4). When the stream indicates
      // AAC-Main it's more likely that the stream contains HE-AAC (5), which cannot be
      // represented correctly in the 2 bit audio_object_type field in the ADTS header. In
      // practice when the stream indicates AAC-SSR or AAC-LTP it more commonly contains AAC-LC or
      // HE-AAC. Since most Android devices don't support AAC-Main, AAC-SSR or AAC-LTP, and since
      // indicating AAC-LC works for HE-AAC streams, we pretend that we're dealing with AAC-LC and
      // hope for the best. In practice this often works.
      // See: https://github.com/google/ExoPlayer/issues/774
      // See: https://github.com/google/ExoPlayer/issues/1383
      Log.w(TAG, "Detected audio object type: " + audioObjectType + ", but assuming AAC LC.");
      audioObjectType = 2;
    }

    int sampleRateIndex = adtsScratch.readBits(4);
    adtsScratch.skipBits(1);
    int channelConfig = adtsScratch.readBits(3);

    byte[] audioSpecificConfig = CodecSpecificDataUtil.buildAacAudioSpecificConfig(
        audioObjectType, sampleRateIndex, channelConfig);
    Pair<Integer, Integer> audioParams = CodecSpecificDataUtil.parseAacAudioSpecificConfig(
        audioSpecificConfig);

    Format format = Format.createAudioSampleFormat(formatId, MimeTypes.AUDIO_AAC, null,
        Format.NO_VALUE, Format.NO_VALUE, audioParams.second, audioParams.first,
        Collections.singletonList(audioSpecificConfig), null, 0, language);
    // In this class a sample is an access unit, but the MediaFormat sample rate specifies the
    // number of PCM audio samples per second.
    sampleDurationUs = (C.MICROS_PER_SECOND * 1024) / format.sampleRate;
    output.format(format);
    hasOutputFormat = true;
  } else {
    adtsScratch.skipBits(10);
  }

  adtsScratch.skipBits(4);
  int sampleSize = adtsScratch.readBits(13) - 2 /* the sync word */ - HEADER_SIZE;
  if (hasCrc) {
    sampleSize -= CRC_SIZE;
  }

  setReadingSampleState(output, sampleDurationUs, 0, sampleSize);
}
Example 4
Source File: AdtsReader.java    From K-Sonic with MIT License 4 votes vote down vote up 
/**
 * Parses the sample header.
 */
private void parseAdtsHeader() {
  adtsScratch.setPosition(0);

  if (!hasOutputFormat) {
    int audioObjectType = adtsScratch.readBits(2) + 1;
    if (audioObjectType != 2) {
      // The stream indicates AAC-Main (1), AAC-SSR (3) or AAC-LTP (4). When the stream indicates
      // AAC-Main it's more likely that the stream contains HE-AAC (5), which cannot be
      // represented correctly in the 2 bit audio_object_type field in the ADTS header. In
      // practice when the stream indicates AAC-SSR or AAC-LTP it more commonly contains AAC-LC or
      // HE-AAC. Since most Android devices don't support AAC-Main, AAC-SSR or AAC-LTP, and since
      // indicating AAC-LC works for HE-AAC streams, we pretend that we're dealing with AAC-LC and
      // hope for the best. In practice this often works.
      // See: https://github.com/google/ExoPlayer/issues/774
      // See: https://github.com/google/ExoPlayer/issues/1383
      Log.w(TAG, "Detected audio object type: " + audioObjectType + ", but assuming AAC LC.");
      audioObjectType = 2;
    }

    int sampleRateIndex = adtsScratch.readBits(4);
    adtsScratch.skipBits(1);
    int channelConfig = adtsScratch.readBits(3);

    byte[] audioSpecificConfig = CodecSpecificDataUtil.buildAacAudioSpecificConfig(
        audioObjectType, sampleRateIndex, channelConfig);
    Pair<Integer, Integer> audioParams = CodecSpecificDataUtil.parseAacAudioSpecificConfig(
        audioSpecificConfig);

    Format format = Format.createAudioSampleFormat(formatId, MimeTypes.AUDIO_AAC, null,
        Format.NO_VALUE, Format.NO_VALUE, audioParams.second, audioParams.first,
        Collections.singletonList(audioSpecificConfig), null, 0, language);
    // In this class a sample is an access unit, but the MediaFormat sample rate specifies the
    // number of PCM audio samples per second.
    sampleDurationUs = (C.MICROS_PER_SECOND * 1024) / format.sampleRate;
    output.format(format);
    hasOutputFormat = true;
  } else {
    adtsScratch.skipBits(10);
  }

  adtsScratch.skipBits(4);
  int sampleSize = adtsScratch.readBits(13) - 2 /* the sync word */ - HEADER_SIZE;
  if (hasCrc) {
    sampleSize -= CRC_SIZE;
  }

  setReadingSampleState(output, sampleDurationUs, 0, sampleSize);
}
Example 5
Source File: AdtsReader.java    From Telegram-FOSS with GNU General Public License v2.0 4 votes vote down vote up 
/**
 * Parses the sample header.
 */
private void parseAdtsHeader() throws ParserException {
  adtsScratch.setPosition(0);

  if (!hasOutputFormat) {
    int audioObjectType = adtsScratch.readBits(2) + 1;
    if (audioObjectType != 2) {
      // The stream indicates AAC-Main (1), AAC-SSR (3) or AAC-LTP (4). When the stream indicates
      // AAC-Main it's more likely that the stream contains HE-AAC (5), which cannot be
      // represented correctly in the 2 bit audio_object_type field in the ADTS header. In
      // practice when the stream indicates AAC-SSR or AAC-LTP it more commonly contains AAC-LC or
      // HE-AAC. Since most Android devices don't support AAC-Main, AAC-SSR or AAC-LTP, and since
      // indicating AAC-LC works for HE-AAC streams, we pretend that we're dealing with AAC-LC and
      // hope for the best. In practice this often works.
      // See: https://github.com/google/ExoPlayer/issues/774
      // See: https://github.com/google/ExoPlayer/issues/1383
      Log.w(TAG, "Detected audio object type: " + audioObjectType + ", but assuming AAC LC.");
      audioObjectType = 2;
    }

    adtsScratch.skipBits(5);
    int channelConfig = adtsScratch.readBits(3);

    byte[] audioSpecificConfig =
        CodecSpecificDataUtil.buildAacAudioSpecificConfig(
            audioObjectType, firstFrameSampleRateIndex, channelConfig);
    Pair<Integer, Integer> audioParams = CodecSpecificDataUtil.parseAacAudioSpecificConfig(
        audioSpecificConfig);

    Format format = Format.createAudioSampleFormat(formatId, MimeTypes.AUDIO_AAC, null,
        Format.NO_VALUE, Format.NO_VALUE, audioParams.second, audioParams.first,
        Collections.singletonList(audioSpecificConfig), null, 0, language);
    // In this class a sample is an access unit, but the MediaFormat sample rate specifies the
    // number of PCM audio samples per second.
    sampleDurationUs = (C.MICROS_PER_SECOND * 1024) / format.sampleRate;
    output.format(format);
    hasOutputFormat = true;
  } else {
    adtsScratch.skipBits(10);
  }

  adtsScratch.skipBits(4);
  int sampleSize = adtsScratch.readBits(13) - 2 /* the sync word */ - HEADER_SIZE;
  if (hasCrc) {
    sampleSize -= CRC_SIZE;
  }

  setReadingSampleState(output, sampleDurationUs, 0, sampleSize);
}
Example 6
Source File: AdtsReader.java    From Telegram with GNU General Public License v2.0 4 votes vote down vote up 
/**
 * Parses the sample header.
 */
private void parseAdtsHeader() throws ParserException {
  adtsScratch.setPosition(0);

  if (!hasOutputFormat) {
    int audioObjectType = adtsScratch.readBits(2) + 1;
    if (audioObjectType != 2) {
      // The stream indicates AAC-Main (1), AAC-SSR (3) or AAC-LTP (4). When the stream indicates
      // AAC-Main it's more likely that the stream contains HE-AAC (5), which cannot be
      // represented correctly in the 2 bit audio_object_type field in the ADTS header. In
      // practice when the stream indicates AAC-SSR or AAC-LTP it more commonly contains AAC-LC or
      // HE-AAC. Since most Android devices don't support AAC-Main, AAC-SSR or AAC-LTP, and since
      // indicating AAC-LC works for HE-AAC streams, we pretend that we're dealing with AAC-LC and
      // hope for the best. In practice this often works.
      // See: https://github.com/google/ExoPlayer/issues/774
      // See: https://github.com/google/ExoPlayer/issues/1383
      Log.w(TAG, "Detected audio object type: " + audioObjectType + ", but assuming AAC LC.");
      audioObjectType = 2;
    }

    adtsScratch.skipBits(5);
    int channelConfig = adtsScratch.readBits(3);

    byte[] audioSpecificConfig =
        CodecSpecificDataUtil.buildAacAudioSpecificConfig(
            audioObjectType, firstFrameSampleRateIndex, channelConfig);
    Pair<Integer, Integer> audioParams = CodecSpecificDataUtil.parseAacAudioSpecificConfig(
        audioSpecificConfig);

    Format format = Format.createAudioSampleFormat(formatId, MimeTypes.AUDIO_AAC, null,
        Format.NO_VALUE, Format.NO_VALUE, audioParams.second, audioParams.first,
        Collections.singletonList(audioSpecificConfig), null, 0, language);
    // In this class a sample is an access unit, but the MediaFormat sample rate specifies the
    // number of PCM audio samples per second.
    sampleDurationUs = (C.MICROS_PER_SECOND * 1024) / format.sampleRate;
    output.format(format);
    hasOutputFormat = true;
  } else {
    adtsScratch.skipBits(10);
  }

  adtsScratch.skipBits(4);
  int sampleSize = adtsScratch.readBits(13) - 2 /* the sync word */ - HEADER_SIZE;
  if (hasCrc) {
    sampleSize -= CRC_SIZE;
  }

  setReadingSampleState(output, sampleDurationUs, 0, sampleSize);
}