#include <aac_audio_specific_config.h>

Public Types
enum	AudioObjectType { AOT_NULL = 0 , AOT_AAC_MAIN = 1 , AOT_AAC_LC = 2 , AOT_AAC_SSR = 3 , AOT_AAC_LTP = 4 , AOT_SBR = 5 , AOT_AAC_SCALABLE = 6 , AOT_TWINVQ = 7 , AOT_CELP = 8 , AOT_HVXC = 9 , AOT_TTSI = 12 , AOT_MAINSYNTH = 13 , AOT_WAVESYNTH = 14 , AOT_MIDI = 15 , AOT_SAFX = 16 , AOT_ER_AAC_LC = 17 , AOT_ER_AAC_LTP = 19 , AOT_ER_AAC_SCALABLE = 20 , AOT_ER_TWINVQ = 21 , AOT_ER_BSAC = 22 , AOT_ER_AAC_LD = 23 , AOT_ER_CELP = 24 , AOT_ER_HVXC = 25 , AOT_ER_HILN = 26 , AOT_ER_PARAM = 27 , AOT_SSC = 28 , AOT_PS = 29 , AOT_SURROUND = 30 , AOT_ESCAPE = 31 , AOT_L1 = 32 , AOT_L2 = 33 , AOT_L3 = 34 , AOT_DST = 35 , AOT_ALS = 36 , AOT_SLS = 37 , AOT_SLS_NON_CORE = 38 , AOT_ER_AAC_ELD = 39 , AOT_SMR_SIMPLE = 40 , AOT_SMR_MAIN = 41 , AOT_USAC = 42 , AOT_SAOC = 43 , AOT_LD_SURROUND = 44 , SAOC_DE = 45 }

Public Member Functions
virtual bool	Parse (const std::vector< uint8_t > &data)

virtual bool	ConvertToADTS (const uint8_t data, size_t data_size, std::vector< uint8_t > audio_frame) const

AudioObjectType	GetAudioObjectType () const

uint32_t	GetSamplesPerSecond () const

uint8_t	GetNumChannels () const

bool	sbr_present () const

void	set_sbr_present (bool sbr_present)
	Indicate whether SBR is present in the stream.

Static Public Attributes
static const size_t	kADTSHeaderSize = 7
	Size in bytes of the ADTS header added by ConvertEsdsToADTS().

Detailed Description

This class parses the AAC information from decoder specific information embedded in the esds box in an ISO BMFF file. Please refer to ISO 14496 Part 3 Table 1.13 - Syntax of AudioSpecificConfig for more details.

Definition at line 22 of file aac_audio_specific_config.h.

Member Function Documentation

◆ ConvertToADTS()

bool shaka::media::AACAudioSpecificConfig::ConvertToADTS	(	const uint8_t *	data,
		size_t	data_size,
		std::vector< uint8_t > *	audio_frame
	)		const

virtual

Convert a raw AAC frame into an AAC frame with an ADTS header.

Parameters

	data	points to the raw AAC frame to be converted.
	data_size	the size of a raw AAC frame.
[out]	audio_frame	contains the converted frame if successful; it is untouched on failure.

Returns: true on success, false otherwise.

Definition at line 143 of file aac_audio_specific_config.cc.

◆ GetAudioObjectType()

AACAudioSpecificConfig::AudioObjectType shaka::media::AACAudioSpecificConfig::GetAudioObjectType ( ) const

Returns: The audio object type for this AAC config, with possible extension considered.

Definition at line 175 of file aac_audio_specific_config.cc.

◆ GetNumChannels()

uint8_t shaka::media::AACAudioSpecificConfig::GetNumChannels ( ) const

Returns: Number of channels for the AAC stream, with possible extensions considered.

Definition at line 197 of file aac_audio_specific_config.cc.

◆ GetSamplesPerSecond()

uint32_t shaka::media::AACAudioSpecificConfig::GetSamplesPerSecond ( ) const

Returns: Sample rate for the AAC stream, with possible extensions considered.

Definition at line 183 of file aac_audio_specific_config.cc.

◆ Parse()

bool shaka::media::AACAudioSpecificConfig::Parse ( const std::vector< uint8_t > & data )

virtual

Parse the AAC config from decoder specific information embedded in an esds box. The function will parse the data and get the ElementaryStreamDescriptor, then it will parse the ElementaryStreamDescriptor to get audio stream configurations.

Parameters

data	contains decoder specific information from an esds box.

Returns: true if successful, false otherwise.

Definition at line 50 of file aac_audio_specific_config.cc.

◆ sbr_present()

bool shaka::media::AACAudioSpecificConfig::sbr_present ( ) const

inline

Returns: whether Spectral Band Repliation (SBR) is present in the stream.

Definition at line 111 of file aac_audio_specific_config.h.

The documentation for this class was generated from the following files:

packager/media/codecs/aac_audio_specific_config.h
packager/media/codecs/aac_audio_specific_config.cc

Public Types

Public Member Functions

Static Public Attributes