MLMediaCodecCryptoInfo
Module: Media Player
Metadata describing the structure of a (at least partially) encrypted input sample. A buffer's data is considered to be partitioned into "subSamples", each subSample starts with a (potentially empty) run of plain, unencrypted bytes followed by a (also potentially empty) run of encrypted bytes. If pattern encryption applies, each of the encrypted runs is encrypted only partly, according to a repeating pattern of "encrypt" and "skip" blocks. This information encapsulates per-sample metadata as outlined in ISO/IEC FDIS 23001-7:2011 "Common encryption in ISO base media file format files". More...
#include <ml_media_codec.h>
Public Attributes
| Type | Name |
|---|---|
| uint32_t | version |
| size_t | number_of_subsamples |
| MLMediaCodecCryptoMode | crypto_mode |
| MLMediaCodecCryptoPattern | crypto_pattern |
| const uint8_t * | key |
| const uint8_t * | iv |
| const size_t * | bytes_of_clear_data |
| const size_t * | bytes_of_encrypted_data |
Detailed Description
struct MLMediaCodecCryptoInfo;
Metadata describing the structure of a (at least partially) encrypted input sample. A buffer's data is considered to be partitioned into "subSamples", each subSample starts with a (potentially empty) run of plain, unencrypted bytes followed by a (also potentially empty) run of encrypted bytes. If pattern encryption applies, each of the encrypted runs is encrypted only partly, according to a repeating pattern of "encrypt" and "skip" blocks. This information encapsulates per-sample metadata as outlined in ISO/IEC FDIS 23001-7:2011 "Common encryption in ISO base media file format files".
Deprecated since 1.4.0. Scheduled for removal.
API Level:
- 20
Public Attributes Documentation
version
uint32_t version;
Version of this structure.
number_of_subsamples
size_t number_of_subsamples;
The number of subsamples that make up the buffer's contents.
crypto_mode
MLMediaCodecCryptoMode crypto_mode;
Cipher Mode associated with the encrypted blocks.
crypto_pattern
MLMediaCodecCryptoPattern crypto_pattern;
| Type | Description |
|---|---|
| MLMediaCodecCryptoPattern | Metadata describing an encryption pattern for the protected bytes in a subsample. |
Encryption pattern used by the subsample.
key
const uint8_t * key;
16 bytes of Key used for the encrypted blocks.
iv
const uint8_t * iv;
16 bytes of Initialization vector used for the encrypted blocks.
bytes_of_clear_data
const size_t * bytes_of_clear_data;
An array of size "number_of_subsamples", that contains the number of leading (potentially none, which is 0) unencrypted bytes in each subsample.
bytes_of_encrypted_data
const size_t * bytes_of_encrypted_data;
An array of size "number_of_subsamples", that contains the number of trailing (potentially none, which is 0) encrypted bytes in each subsample.