diff options
| author | Carl Eugen Hoyos <ceffmpeg@gmail.com> | 2019-01-12 17:27:48 +0100 |
|---|---|---|
| committer | Carl Eugen Hoyos <ceffmpeg@gmail.com> | 2019-01-12 17:27:48 +0100 |
| commit | 90ab9a58ff697e0a7bfd89715cba5a8fb4074b35 (patch) | |
| tree | 6051df6604a0e0a25a373a674e17f5049e0eb9e5 /libavcodec/tiff.c | |
| parent | 261e4cf03f9ab45a3c0afc6f84b19e2f2de477ff (diff) | |
lavc/tiff: Support CMYK images.
Fixes ticket #3459.
Diffstat (limited to 'libavcodec/tiff.c')
| -rw-r--r-- | libavcodec/tiff.c | 22 |
1 files changed, 20 insertions, 2 deletions
diff --git a/libavcodec/tiff.c b/libavcodec/tiff.c index 570b3cbd01..5a4271c012 100644 --- a/libavcodec/tiff.c +++ b/libavcodec/tiff.c @@ -825,7 +825,7 @@ static int init_image(TiffContext *s, ThreadFrame *frame) s->avctx->pix_fmt = s->le ? AV_PIX_FMT_YA16LE : AV_PIX_FMT_YA16BE; break; case 324: - s->avctx->pix_fmt = AV_PIX_FMT_RGBA; + s->avctx->pix_fmt = s->photometric == TIFF_PHOTOMETRIC_SEPARATED ? AV_PIX_FMT_RGB0 : AV_PIX_FMT_RGBA; break; case 483: s->avctx->pix_fmt = s->le ? AV_PIX_FMT_RGB48LE : AV_PIX_FMT_RGB48BE; @@ -1100,12 +1100,12 @@ static int tiff_decode_tag(TiffContext *s, AVFrame *frame) case TIFF_PHOTOMETRIC_BLACK_IS_ZERO: case TIFF_PHOTOMETRIC_RGB: case TIFF_PHOTOMETRIC_PALETTE: + case TIFF_PHOTOMETRIC_SEPARATED: case TIFF_PHOTOMETRIC_YCBCR: case TIFF_PHOTOMETRIC_CFA: s->photometric = value; break; case TIFF_PHOTOMETRIC_ALPHA_MASK: - case TIFF_PHOTOMETRIC_SEPARATED: case TIFF_PHOTOMETRIC_CIE_LAB: case TIFF_PHOTOMETRIC_ICC_LAB: case TIFF_PHOTOMETRIC_ITU_LAB: @@ -1530,6 +1530,24 @@ again: dst += stride; } } + + if (s->photometric == TIFF_PHOTOMETRIC_SEPARATED && + s->avctx->pix_fmt == AV_PIX_FMT_RGB0) { + dst = p->data[plane]; + for (i = 0; i < s->height; i++) { + for (j = 0; j < s->width; j++) { + int k = 255 - dst[4 * j + 3]; + int r = (255 - dst[4 * j ]) * k; + int g = (255 - dst[4 * j + 1]) * k; + int b = (255 - dst[4 * j + 2]) * k; + dst[4 * j ] = r * 257 >> 16; + dst[4 * j + 1] = g * 257 >> 16; + dst[4 * j + 2] = b * 257 >> 16; + dst[4 * j + 3] = 255; + } + dst += p->linesize[plane]; + } + } } if (s->planar && s->bppcount > 2) { |