@type alignment() :: :obu | :tu

Determines how buffers of a stream with AV1 stream format are aligned:

• :tu - each buffer contains a single TU (Temporal Unit), beginning with an OBU (Open Bistream Unit) of type OBU_TEMPORAL_DELIMITER
• :obu - each buffer contains a number of complete OBUs, but there is no guarantee that they constitute a single TU.

@type level() ::
  :"2.0"
  | :"2.1"
  | :"2.2"
  | :"2.3"
  | :"3.0"
  | :"3.1"
  | :"3.2"
  | :"3.3"
  | :"4.0"
  | :"4.1"
  | :"4.2"
  | :"4.3"
  | :"5.0"
  | :"5.1"
  | :"5.2"
  | :"5.3"
  | :"6.0"
  | :"6.1"
  | :"6.2"
  | :"6.3"
  | :"7.0"
  | :"7.1"
  | :"7.2"
  | :"7.3"

Determines the resolution and performance constraints of a bitstream, with which a decoder must be compliant. The bitrate constraint for levels 4.0 and higher is also determined by tier/0. The constraints are defined in Annex A, chapter A.3. of AV1 specification.

@type profile() :: :main | :high | :professional

Determines the bit depth and subsampling constraints of a bitstream, with which a decoder must be compliant. The constraints are defined in Annex A, chapter A.2. of AV1 specification.

@type t() :: %Membrane.AV1{
  alignment: alignment(),
  framerate: framerate() | nil,
  height: pos_integer() | nil,
  level: level() | nil,
  profile: profile() | nil,
  tier: tier() | nil,
  width: pos_integer() | nil
}

AV1 stream format.

@type tier() :: :main | :high

Determines the bitrate and compression rate constraint of a bitstream for a given level/0. In the table defining the constraints of levels (Annex A, chapter A.3. of AV1 specification), tier determines whether values from MainMbps and MainCR (:main tier), or HighMbps and HighCR for (:high tier) are assumed. :main is the only valid tier for levels lower than 4.0.