CryptoInfo
@UnstableApi
public final class CryptoInfo
Metadata describing the structure of an encrypted input sample.
This class is a compatibility wrapper for android.media.MediaCodec.CryptoInfo.
Summary
Public fields |
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int |
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int |
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final MediaCodec.CryptoInfo |
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@Nullable byte[] |
The 16 byte initialization vector. |
@Nullable byte[] |
The 16 byte key id. |
int |
The type of encryption that has been applied. |
@Nullable int[] |
The number of leading unencrypted bytes in each sub-sample. |
@Nullable int[] |
The number of trailing encrypted bytes in each sub-sample. |
int |
The number of subSamples that make up the buffer's contents. |
Public constructors |
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Public methods |
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MediaCodec.CryptoInfo |
Returns an equivalent |
void |
increaseClearDataFirstSubSampleBy(int count)Increases the number of clear data for the first sub sample by |
void |
set( |
Public fields
iv
public @Nullable byte[] iv
The 16 byte initialization vector. If the initialization vector of the content is shorter than 16 bytes, 0 byte padding is appended to extend the vector to the required 16 byte length.
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iv |
mode
@C.CryptoMode
public int mode
The type of encryption that has been applied. Must be one of the C.CryptoMode values.
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mode |
numBytesOfClearData
public @Nullable int[] numBytesOfClearData
The number of leading unencrypted bytes in each sub-sample. If null, all bytes are treated as encrypted and numBytesOfEncryptedData must be specified.
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numBytesOfClearData |
numBytesOfEncryptedData
public @Nullable int[] numBytesOfEncryptedData
The number of trailing encrypted bytes in each sub-sample. If null, all bytes are treated as clear and numBytesOfClearData must be specified.
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numBytesOfEncryptedData |
numSubSamples
public int numSubSamples
The number of subSamples that make up the buffer's contents.
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numSubSamples |
Public constructors
Public methods
getFrameworkCryptoInfo
public MediaCodec.CryptoInfo getFrameworkCryptoInfo()
Returns an equivalent android.media.MediaCodec.CryptoInfo instance.
Successive calls to this method on a single CryptoInfo will return the same instance. Changes to the CryptoInfo will be reflected in the returned object. The return object should not be modified directly.
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MediaCodec.CryptoInfo |
The equivalent |
increaseClearDataFirstSubSampleBy
public void increaseClearDataFirstSubSampleBy(int count)
Increases the number of clear data for the first sub sample by count.
If count is 0, this method is a no-op. Otherwise, it adds count to numBytesOfClearData[0].
If numBytesOfClearData is null (which is permitted), this method will instantiate it to a new int[1].
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int count |
The number of bytes to be added to the first subSample of |
set
public void set(
int numSubSamples,
int[] numBytesOfClearData,
int[] numBytesOfEncryptedData,
byte[] key,
byte[] iv,
@C.CryptoMode int mode,
int encryptedBlocks,
int clearBlocks
)
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set |