diff options
Diffstat (limited to 'src/lib/image.cc')
| -rw-r--r-- | src/lib/image.cc | 43 |
1 files changed, 43 insertions, 0 deletions
diff --git a/src/lib/image.cc b/src/lib/image.cc index 03f1bf6dc..891715a46 100644 --- a/src/lib/image.cc +++ b/src/lib/image.cc @@ -1319,3 +1319,46 @@ Image::as_png () const return dcp::ArrayData (state.data, state.size); } + + +void +Image::video_range_to_full_range () +{ + switch (_pixel_format) { + case AV_PIX_FMT_RGB24: + { + float const factor = 256.0 / 219.0; + uint8_t* p = data()[0]; + int const lines = sample_size(0).height; + for (int y = 0; y < lines; ++y) { + uint8_t* q = p; + for (int x = 0; x < line_size()[0]; ++x) { + *q = int((*q - 16) * factor); + ++q; + } + p += stride()[0]; + } + break; + } + case AV_PIX_FMT_GBRP12LE: + { + float const factor = 4096.0 / 3504.0; + for (int c = 0; c < 3; ++c) { + uint16_t* p = reinterpret_cast<uint16_t*>(data()[c]); + int const lines = sample_size(c).height; + for (int y = 0; y < lines; ++y) { + uint16_t* q = p; + int const line_size_pixels = line_size()[c] / 2; + for (int x = 0; x < line_size_pixels; ++x) { + *q = int((*q - 256) * factor); + ++q; + } + } + } + break; + } + default: + throw PixelFormatError ("video_range_to_full_range()", _pixel_format); + } +} + |