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| author | Paul B Mahol <onemda@gmail.com> | 2022-09-23 17:30:55 +0200 |
|---|---|---|
| committer | Paul B Mahol <onemda@gmail.com> | 2022-09-23 20:28:31 +0200 |
| commit | ec8be8a913d64af210afee27cbedfafcbcbd05c9 (patch) | |
| tree | 2e7a913965ac8c93928e5560dca96f050e523fff /libavcodec | |
| parent | 6c233910640e0616db2f2ed0b39a6c20f6208add (diff) | |
| download | ffmpeg-ec8be8a913d64af210afee27cbedfafcbcbd05c9.tar.gz | |
avcodec/tiff: improve lut handling for DNG
Diffstat (limited to 'libavcodec')
| -rw-r--r-- | libavcodec/tiff.c | 8 | ||||
| -rw-r--r-- | libavcodec/tiff.h | 1 |
2 files changed, 5 insertions, 4 deletions
diff --git a/libavcodec/tiff.c b/libavcodec/tiff.c index 226050744f..4da77a3a31 100644 --- a/libavcodec/tiff.c +++ b/libavcodec/tiff.c @@ -283,16 +283,15 @@ static uint16_t av_always_inline dng_process_color16(uint16_t value, float value_norm; // Lookup table lookup - if (lut) - value = lut[value]; + value = lut[value]; // Black level subtraction value = av_clip_uint16_c((unsigned)value - black_level); // Color scaling - value_norm = (float)value * scale_factor; + value_norm = (float)value * scale_factor * 65535.f; - value = av_clip_uint16_c(value_norm * 65535); + value = av_clip_uint16_c(lrintf(value_norm)); return value; } @@ -1414,6 +1413,7 @@ static int tiff_decode_tag(TiffContext *s, AVFrame *frame) else if (count > 1) s->sub_ifd = ff_tget(&s->gb, TIFF_LONG, s->le); /** Only get the first SubIFD */ break; + case TIFF_GRAY_RESPONSE_CURVE: case DNG_LINEARIZATION_TABLE: if (count > FF_ARRAY_ELEMS(s->dng_lut)) return AVERROR_INVALIDDATA; diff --git a/libavcodec/tiff.h b/libavcodec/tiff.h index c07a5d4fa9..9d2ab90f52 100644 --- a/libavcodec/tiff.h +++ b/libavcodec/tiff.h @@ -66,6 +66,7 @@ enum TiffTags { TIFF_PAGE_NAME = 0x11D, TIFF_XPOS = 0x11E, TIFF_YPOS = 0x11F, + TIFF_GRAY_RESPONSE_CURVE= 0x123, TIFF_T4OPTIONS = 0x124, TIFF_T6OPTIONS, TIFF_RES_UNIT = 0x128, |