shaka::media::DecryptConfig Class Reference

#include <decrypt_config.h>

Public Member Functions
	DecryptConfig (const std::vector< uint8_t > &key_id, const std::vector< uint8_t > &iv, const std::vector< SubsampleEntry > &subsamples)
	DecryptConfig (const std::vector< uint8_t > &key_id, const std::vector< uint8_t > &iv, const std::vector< SubsampleEntry > &subsamples, FourCC protection_scheme, uint8_t crypt_byte_block, uint8_t skip_byte_block)
void	AddSubsample (uint16_t clear_bytes, uint32_t cipher_bytes)
size_t	GetTotalSizeOfSubsamples () const
const std::vector< uint8_t > &	key_id () const
const std::vector< uint8_t > &	iv () const
const std::vector< SubsampleEntry > &	subsamples () const
FourCC	protection_scheme () const
uint8_t	crypt_byte_block () const
uint8_t	skip_byte_block () const

Static Public Attributes
static const size_t	kDecryptionKeySize = 16
	Keys are always 128 bits.

Detailed Description

Contains all the information that a decryptor needs to decrypt a media sample.

Definition at line 39 of file decrypt_config.h.

Constructor & Destructor Documentation

DecryptConfig() [1/2]

shaka::media::DecryptConfig::DecryptConfig	(	const std::vector< uint8_t > &	key_id,
		const std::vector< uint8_t > &	iv,
		const std::vector< SubsampleEntry > &	subsamples
	)

Create a 'cenc' decrypt config.

Parameters

key_id	is the ID that references the decryption key.
iv	is the initialization vector defined by the encryptor.
subsamples	defines the clear and encrypted portions of the sample as described in SubsampleEntry. A decrypted buffer will be equal in size to the sum of the subsample sizes.

Definition at line 13 of file decrypt_config.cc.

DecryptConfig() [2/2]

shaka::media::DecryptConfig::DecryptConfig	(	const std::vector< uint8_t > &	key_id,
		const std::vector< uint8_t > &	iv,
		const std::vector< SubsampleEntry > &	subsamples,
		FourCC	protection_scheme,
		uint8_t	crypt_byte_block,
		uint8_t	skip_byte_block
	)

Create a general decrypt config with possible pattern-based encryption.

Parameters

key_id	is the ID that references the decryption key.
iv	is the initialization vector defined by the encryptor.
subsamples	defines the clear and encrypted portions of the sample as described in SubsampleEntry. A decrypted buffer will be equal in size to the sum of the subsample sizes.
protection_scheme	specifies the protection scheme: 'cenc', 'cens', 'cbc1', 'cbcs'.
crypt_byte_block	indicates number of encrypted blocks (16-byte) in pattern based encryption, 'cens' and 'cbcs'. Ignored otherwise.
skip_byte_block	indicates number of unencrypted blocks (16-byte) in pattern based encryption, 'cens' and 'cbcs'. Ignored otherwise.

Definition at line 18 of file decrypt_config.cc.

~DecryptConfig()

shaka::media::DecryptConfig::~DecryptConfig

(

)

Definition at line 33 of file decrypt_config.cc.

Member Function Documentation

AddSubsample()

void shaka::media::DecryptConfig::AddSubsample ( uint16_t  clear_bytes, uint32_t  cipher_bytes  )

inline

Parameters

clear_bytes	is the size of clear bytes in the subsample to be added.
cipher_bytes	is the size of cipher bytes in the subsample to be added.

Definition at line 79 of file decrypt_config.h.

crypt_byte_block()

uint8_t shaka::media::DecryptConfig::crypt_byte_block ( ) const

inline

Definition at line 90 of file decrypt_config.h.

GetTotalSizeOfSubsamples()

size_t shaka::media::DecryptConfig::GetTotalSizeOfSubsamples

(

)

const

Returns

The total size of subsamples.

Definition at line 35 of file decrypt_config.cc.

iv()

const std::vector< uint8_t > & shaka::media::DecryptConfig::iv ( ) const

inline

Definition at line 87 of file decrypt_config.h.

key_id()

const std::vector< uint8_t > & shaka::media::DecryptConfig::key_id ( ) const

inline

Definition at line 86 of file decrypt_config.h.

protection_scheme()

FourCC shaka::media::DecryptConfig::protection_scheme ( ) const

inline

Definition at line 89 of file decrypt_config.h.

skip_byte_block()

uint8_t shaka::media::DecryptConfig::skip_byte_block ( ) const

inline

Definition at line 91 of file decrypt_config.h.

subsamples()

const std::vector< SubsampleEntry > & shaka::media::DecryptConfig::subsamples ( ) const

inline

Definition at line 88 of file decrypt_config.h.

Member Data Documentation

kDecryptionKeySize

const size_t shaka::media::DecryptConfig::kDecryptionKeySize = 16

static

Keys are always 128 bits.

Definition at line 42 of file decrypt_config.h.

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

• packager/media/base/decrypt_config.h
• packager/media/base/decrypt_config.cc