shaka::media::AACAudioSpecificConfig Class Reference

#include <aac_audio_specific_config.h>

Public Member Functions
virtual bool	Parse (const std::vector< uint8_t > &data)
virtual bool	ConvertToADTS (std::vector< uint8_t > *buffer) const
uint32_t	GetOutputSamplesPerSecond (bool sbr_in_mimetype) const
uint8_t	GetNumChannels (bool sbr_in_mimetype) const
uint8_t	audio_object_type () const
uint32_t	frequency () const
uint8_t	num_channels () const

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 23 of file aac_audio_specific_config.h.

Member Function Documentation

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

inline

Returns

The audio object type for this AAC config.

Definition at line 54 of file aac_audio_specific_config.h.

bool shaka::media::AACAudioSpecificConfig::ConvertToADTS ( std::vector< uint8_t > *  buffer ) const

virtual

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

Parameters

[in,out]

buffer

contains the raw AAC frame on input, and the converted frame on output if successful; it is untouched on failure.

Returns

true on success, false otherwise.

Definition at line 128 of file aac_audio_specific_config.cc.

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

inline

Returns

The sampling frequency for this AAC config.

Definition at line 57 of file aac_audio_specific_config.h.

uint8_t shaka::media::AACAudioSpecificConfig::GetNumChannels

(

bool

sbr_in_mimetype

)

const

Parameters

sbr_in_mimetype

indicates whether SBR mode is specified in the mimetype, i.e. codecs parameter contains mp4a.40.5.

Returns

Number of channels for the AAC stream.

Definition at line 168 of file aac_audio_specific_config.cc.

uint32_t shaka::media::AACAudioSpecificConfig::GetOutputSamplesPerSecond

(

bool

sbr_in_mimetype

)

const

Parameters

sbr_in_mimetype

indicates whether SBR mode is specified in the mimetype, i.e. codecs parameter contains mp4a.40.5.

Returns

Output sample rate for the AAC stream.

Definition at line 153 of file aac_audio_specific_config.cc.

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

inline

Returns

Number of channels for this AAC config.

Definition at line 60 of file aac_audio_specific_config.h.

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 39 of file aac_audio_specific_config.cc.

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

• media/codecs/aac_audio_specific_config.h
• media/codecs/aac_audio_specific_config.cc