Constructor
new ContentWorkarounds()
A collection of methods to work around content issues on various platforms.
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Members
BOX_SIZE_64_OFFSET_ :number
Offset to a box's 64-bit size field, if it has one.
Type:
- number
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BOX_SIZE_OFFSET_ :number
Offset to a box's size field.
Type:
- number
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BOX_TYPE_AC_3_ :number
Box type for "ac-3".
Type:
- number
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BOX_TYPE_DAC3_ :number
Box type for "dac3".
Type:
- number
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BOX_TYPE_DEC3_ :number
Box type for "dec3".
Type:
- number
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BOX_TYPE_EC_3_ :number
Box type for "ec-3".
Type:
- number
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BOX_TYPE_ENCA_ :number
Box type for "enca".
Type:
- number
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BOX_TYPE_ENCV_ :number
Box type for "encv".
Type:
- number
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BOX_TYPE_OFFSET_ :number
Offset to a box's type field.
Type:
- number
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Methods
createEncryptionMetadata_(streamnon-null, initSegmentnon-null, sourceBox, metadataBoxType) → {Uint8Array}
Create an encryption metadata box ("encv" or "enca" box), based on the
source box ("mp4a", "avc1", etc). Returns a new buffer containing the
encryption metadata box.
Parameters:
| Name | Type | Description |
|---|---|---|
stream |
shaka.extern.Stream | |
initSegment |
Uint8Array | |
sourceBox |
shaka.extern.ParsedBox | |
metadataBoxType |
number |
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Returns:
- Type
- Uint8Array
fakeEC3(initSegmentBuffernon-null) → {Uint8Array}
Transform the init segment into a new init segment buffer that indicates
EC-3 as audio codec instead of AC-3. Even though any EC-3 decoder should
be able to decode AC-3 streams, there are platforms that do not accept
AC-3 as codec.
Should only be called for MP4 init segments, and only on platforms that
need this workaround. Returns a new buffer containing the modified init
segment.
Parameters:
| Name | Type | Description |
|---|---|---|
initSegmentBuffer |
BufferSource |
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Returns:
- Type
- Uint8Array
fakeEncryption(streamnon-null, initSegmentBuffernon-null, urinullable) → {Uint8Array}
Transform the init segment into a new init segment buffer that indicates
encryption. If the init segment already indicates encryption, return the
original init segment.
Should only be called for MP4 init segments, and only on platforms that
need this workaround.
Parameters:
| Name | Type | Attributes | Description |
|---|---|---|---|
stream |
shaka.extern.Stream | ||
initSegmentBuffer |
BufferSource | ||
uri |
string |
<nullable> |
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Returns:
- Type
- Uint8Array
fakeMediaEncryption(mediaSegmentBuffernon-null) → {Uint8Array}
Parameters:
| Name | Type | Description |
|---|---|---|
mediaSegmentBuffer |
BufferSource |
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Returns:
- Type
- Uint8Array
fakeMediaEncryptionInChunk_(chunknon-null) → {Uint8Array}
Parameters:
| Name | Type | Description |
|---|---|---|
chunk |
Uint8Array |
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Returns:
- Type
- Uint8Array
insertEncryptionMetadata_(streamnon-null, initSegmentnon-null, stsdBox, sourceBox, ancestorBoxesnon-null, metadataBoxType) → {Uint8Array}
Insert an encryption metadata box ("encv" or "enca" box) into the MP4 init
segment, based on the source box ("mp4a", "avc1", etc). Returns a new
buffer containing the modified init segment.
Parameters:
| Name | Type | Description |
|---|---|---|
stream |
shaka.extern.Stream | |
initSegment |
Uint8Array | |
stsdBox |
shaka.extern.ParsedBox | |
sourceBox |
shaka.extern.ParsedBox | |
ancestorBoxes |
Array.<shaka.extern.ParsedBox> | |
metadataBoxType |
number |
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Returns:
- Type
- Uint8Array
updateBoxSize_(dataArraynon-null, boxStart, newBoxSize)
Modify an MP4 box's size field in-place.
Parameters:
| Name | Type | Description |
|---|---|---|
dataArray |
Uint8Array | |
boxStart |
number | The start position of the box in dataArray. |
newBoxSize |
number | The new size of the box. |
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