AacUtil (ExoPlayer library) - Exoplayer

Package com.google.android.exoplayer2.audio

Class AacUtil

java.lang.Object
- com.google.android.exoplayer2.audio.AacUtil

[@Deprecated](https://developer.android.com/reference/java/lang/Deprecated.html "class or interface in java.lang")public final classAacUtilextends[Object](https://developer.android.com/reference/java/lang/Object.html "class or interface in java.lang")

Deprecated. com.google.android.exoplayer2 is deprecated. Please migrate to androidx.media3 (which contains the same ExoPlayer code). See the migration guide for more details, including a script to help with the migration.

Utility methods for handling AAC audio streams.

Nested Class Summary

Nested Classes | Modifier and Type | Class | Description | | --- | --- | --- | | static interface | AacUtil.AacAudioObjectType | Deprecated.

Valid AAC Audio object types. | | static class | AacUtil.Config | Deprecated.

Holds sample format information for AAC audio. |

Field Summary

Fields | Modifier and Type | Field | Description | | --- | --- | --- | | static int | AAC_ELD_MAX_RATE_BYTES_PER_SECOND | Deprecated.

Maximum rate for an AAC ELD audio stream, in bytes per second. | | static int | AAC_HE_AUDIO_SAMPLE_COUNT | Deprecated.

Number of raw audio samples that are produced per channel when decoding an AAC HE access unit. | | static int | AAC_HE_V1_MAX_RATE_BYTES_PER_SECOND | Deprecated.

Maximum rate for an AAC HE V1 audio stream, in bytes per second. | | static int | AAC_HE_V2_MAX_RATE_BYTES_PER_SECOND | Deprecated.

Maximum rate for an AAC HE V2 audio stream, in bytes per second. | | static int | AAC_LC_AUDIO_SAMPLE_COUNT | Deprecated.

Number of raw audio samples that are produced per channel when decoding an AAC LC access unit. | | static int | AAC_LC_MAX_RATE_BYTES_PER_SECOND | Deprecated.

Maximum rate for an AAC LC audio stream, in bytes per second. | | static int | AAC_LD_AUDIO_SAMPLE_COUNT | Deprecated.

Number of raw audio samples that are produced per channel when decoding an AAC LD access unit. | | static int | AAC_XHE_AUDIO_SAMPLE_COUNT | Deprecated.

Number of raw audio samples that are produced per channel when decoding an AAC XHE access unit. | | static int | AAC_XHE_MAX_RATE_BYTES_PER_SECOND | Deprecated.

Method Summary

All Methods Static Methods Concrete Methods Deprecated Methods | Modifier and Type | Method | Description | | --- | --- | --- | | static byte[] | buildAacLcAudioSpecificConfig(int sampleRate, int channelCount) | Deprecated.

Builds a simple AAC LC AudioSpecificConfig, as defined in ISO 14496-3 1.6.2.1 | | static byte[] | buildAudioSpecificConfig(int audioObjectType, int sampleRateIndex, int channelConfig) | Deprecated.

Builds a simple AudioSpecificConfig, as defined in ISO 14496-3 1.6.2.1 | | static AacUtil.Config | parseAudioSpecificConfig(byte[] audioSpecificConfig) | Deprecated.

Parses an AAC AudioSpecificConfig, as defined in ISO 14496-3 1.6.2.1 | | static AacUtil.Config | parseAudioSpecificConfig(ParsableBitArray bitArray, boolean forceReadToEnd) | Deprecated.

Parses an AAC AudioSpecificConfig, as defined in ISO 14496-3 1.6.2.1 |

Methods inherited from class java.lang.Object

clone, equals, finalize, getClass, hashCode, notify, notifyAll, toString, wait, wait, wait

Field Detail

AAC_LC_AUDIO_SAMPLE_COUNT

public static final int AAC_LC_AUDIO_SAMPLE_COUNT

Deprecated.

Number of raw audio samples that are produced per channel when decoding an AAC LC access unit. See Also:Constant Field Values

AAC_XHE_AUDIO_SAMPLE_COUNT

public static final int AAC_XHE_AUDIO_SAMPLE_COUNT

Deprecated.

Number of raw audio samples that are produced per channel when decoding an AAC XHE access unit. See Also:Constant Field Values

AAC_HE_AUDIO_SAMPLE_COUNT

public static final int AAC_HE_AUDIO_SAMPLE_COUNT

Deprecated.

Number of raw audio samples that are produced per channel when decoding an AAC HE access unit. See Also:Constant Field Values

AAC_LD_AUDIO_SAMPLE_COUNT

public static final int AAC_LD_AUDIO_SAMPLE_COUNT

Deprecated.

Number of raw audio samples that are produced per channel when decoding an AAC LD access unit. See Also:Constant Field Values

AAC_LC_MAX_RATE_BYTES_PER_SECOND

public static final int AAC_LC_MAX_RATE_BYTES_PER_SECOND

Deprecated.

Maximum rate for an AAC LC audio stream, in bytes per second. See Also:Constant Field Values

AAC_HE_V1_MAX_RATE_BYTES_PER_SECOND

public static final int AAC_HE_V1_MAX_RATE_BYTES_PER_SECOND

Deprecated.

Maximum rate for an AAC HE V1 audio stream, in bytes per second. See Also:Constant Field Values

AAC_HE_V2_MAX_RATE_BYTES_PER_SECOND

public static final int AAC_HE_V2_MAX_RATE_BYTES_PER_SECOND

Deprecated.

Maximum rate for an AAC HE V2 audio stream, in bytes per second. See Also:Constant Field Values

AAC_XHE_MAX_RATE_BYTES_PER_SECOND

public static final int AAC_XHE_MAX_RATE_BYTES_PER_SECOND

Deprecated.

Maximum rate for an AAC XHE audio stream, in bytes per second.

Fraunhofer documentation says "500 kbit/s and above" for stereo, so we use a rate generously above the 500 kbit/s level.

AAC_ELD_MAX_RATE_BYTES_PER_SECOND

public static final int AAC_ELD_MAX_RATE_BYTES_PER_SECOND

Deprecated.

Maximum rate for an AAC ELD audio stream, in bytes per second.

Fraunhofer documentation shows AAC-ELD as useful for up to ~ 64 kbit/s so we use this value.

AUDIO_OBJECT_TYPE_AAC_LC

public static final int AUDIO_OBJECT_TYPE_AAC_LC

Deprecated. See Also:Constant Field Values

AUDIO_OBJECT_TYPE_AAC_SBR

public static final int AUDIO_OBJECT_TYPE_AAC_SBR

Deprecated. See Also:Constant Field Values

AUDIO_OBJECT_TYPE_AAC_ER_BSAC

public static final int AUDIO_OBJECT_TYPE_AAC_ER_BSAC

Deprecated. See Also:Constant Field Values

AUDIO_OBJECT_TYPE_AAC_ELD

public static final int AUDIO_OBJECT_TYPE_AAC_ELD

Deprecated. See Also:Constant Field Values

AUDIO_OBJECT_TYPE_AAC_PS

public static final int AUDIO_OBJECT_TYPE_AAC_PS

Deprecated. See Also:Constant Field Values

AUDIO_OBJECT_TYPE_AAC_XHE

public static final int AUDIO_OBJECT_TYPE_AAC_XHE

Deprecated. See Also:Constant Field Values

Method Detail

parseAudioSpecificConfig

public static[AacUtil.Config](AacUtil.Config.html "class in com.google.android.exoplayer2.audio")parseAudioSpecificConfig(byte[] audioSpecificConfig)
                                               throws[ParserException](../ParserException.html "class in com.google.android.exoplayer2")

Deprecated.

Parses an AAC AudioSpecificConfig, as defined in ISO 14496-3 1.6.2.1 Parameters:audioSpecificConfig - A byte array containing the AudioSpecificConfig to parse.Returns:The parsed configuration.Throws:ParserException - If the AudioSpecificConfig cannot be parsed because it is invalid or unsupported.

parseAudioSpecificConfig

public static[AacUtil.Config](AacUtil.Config.html "class in com.google.android.exoplayer2.audio")parseAudioSpecificConfig([ParsableBitArray](../util/ParsableBitArray.html "class in com.google.android.exoplayer2.util")bitArray,
                                                      boolean forceReadToEnd)
                                               throws[ParserException](../ParserException.html "class in com.google.android.exoplayer2")

Deprecated.

Parses an AAC AudioSpecificConfig, as defined in ISO 14496-3 1.6.2.1 Parameters:bitArray - A ParsableBitArray containing the AudioSpecificConfig to parse. The position is advanced to the end of the AudioSpecificConfig.forceReadToEnd - Whether the entire AudioSpecificConfig should be read. Required for knowing the length of the configuration payload.Returns:The parsed configuration.Throws:ParserException - If the AudioSpecificConfig cannot be parsed because it is invalid or unsupported.

buildAacLcAudioSpecificConfig

public static byte[] buildAacLcAudioSpecificConfig(int sampleRate,
                                                   int channelCount)

Deprecated.

Builds a simple AAC LC AudioSpecificConfig, as defined in ISO 14496-3 1.6.2.1 Parameters:sampleRate - The sample rate in Hz.channelCount - The channel count.Returns:The AudioSpecificConfig.

buildAudioSpecificConfig

public static byte[] buildAudioSpecificConfig(int audioObjectType,
                                              int sampleRateIndex,
                                              int channelConfig)

Deprecated.

Builds a simple AudioSpecificConfig, as defined in ISO 14496-3 1.6.2.1 Parameters:audioObjectType - The audio object type.sampleRateIndex - The sample rate index.channelConfig - The channel configuration.Returns:The AudioSpecificConfig.