Methods
normalizeTsObu_(datanon-null) → {Array<!Uint8Array>}
Turns one escaped ts_open_bitstream_unit() payload, with its start code
already stripped, into the pieces of the equivalent low overhead OBU.
Returns null if the OBU header cannot be read.
Parameters:
| Name | Type | Description |
|---|---|---|
data |
Uint8Array |
- Source:
Returns:
- Type
- Array<!Uint8Array>
parseAv1(datanon-null) → {Array<shaka.util.Obu.Unit>}
Splits an AV1 temporal unit into its OBUs.
Parameters:
| Name | Type | Description |
|---|---|---|
data |
Uint8Array |
- Source:
Returns:
- Type
- Array<shaka.util.Obu.Unit>
parseAv1Ts(datanon-null) → {Uint8Array}
Converts an AV1 access unit carried in MPEG-2 TS into the low overhead
bitstream format, which is what both parseAv1() and an `av01` sample
expect. Returns null when the access unit cannot be read.
MPEG-2 TS does not carry the low overhead format directly: each OBU is
wrapped in a ts_open_bitstream_unit(), which prefixes it with a 0x000001
start code and escapes the byte sequences that would emulate one, in the
same way H.264 does. On top of that, obu_size is only recommended there,
not required, so an OBU that relies on the start code to delimit it has
to get its size field back before anything else can read it.
Parameters:
| Name | Type | Description |
|---|---|---|
data |
Uint8Array |
- Source:
Returns:
- Type
- Uint8Array
parseIamf(datanon-null) → {Array<shaka.util.Obu.Unit>}
Splits a sequence of IAMF OBUs.
Parameters:
| Name | Type | Description |
|---|---|---|
data |
Uint8Array |
- Source:
Returns:
- Type
- Array<shaka.util.Obu.Unit>
readLeb128(datanon-null, offset) → {?{value: number, size: number}}
Reads an unsigned leb128() at the given offset. Returns null if the value
is truncated or malformed, in which case the rest of the data cannot be
trusted either.
Parameters:
| Name | Type | Description |
|---|---|---|
data |
Uint8Array | |
offset |
number |
- Source:
Returns:
- Type
- ?{value: number, size: number}
unescapeTsObu_(datanon-null) → {Uint8Array}
Removes the emulation prevention bytes from one escaped OBU. Returns the
input untouched when there are none, which is the common case.
Parameters:
| Name | Type | Description |
|---|---|---|
data |
Uint8Array |
- Source:
Returns:
- Type
- Uint8Array
writeLeb128_(value) → {Uint8Array}
Encodes a value as an unsigned leb128().
Parameters:
| Name | Type | Description |
|---|---|---|
value |
number |
- Source:
Returns:
- Type
- Uint8Array
Type Definitions
Unit
One Open Bitstream Unit.
`data` is the OBU payload alone, with the header and every field that
precedes the payload already skipped; `fullData` also covers the header,
which is what an `av1C` configOBUs entry needs. `type` is the obu_type
field, whose meaning depends on the format the OBU was parsed from.
Type:
- {type: number, data: !Uint8Array, fullData: !Uint8Array}
- Source: