Detailed Transfer Function Descriptions
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## Detailed Transfer Function Descriptions

### Transfer Function SMPTE 2084 (`V4L2_XFER_FUNC_SMPTE2084`)

The [SMPTE ST 2084] standard defines the transfer function used by High Dynamic Range content.

Constants:

  m1 = (2610 / 4096) / 4

  m2 = (2523 / 4096) * 128

  c1 = 3424 / 4096

  c2 = (2413 / 4096) * 32

  c3 = (2392 / 4096) * 32

Transfer function:

  L' = ((c1 + c2 * Lm1) / (1 + c3 * Lm1))m2

Inverse Transfer function:

  L = (max(L'1/m2 - c1, 0) / (c2 - c3 * L'1/m2))1/m1

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