[FFmpeg-devel] [PATCH]Write TIFFTAG_EXTRASAMPLES for pix_fmts containing transparency

[Carl Eugen Hoyos]

Carl Eugen Hoyos <cehoyos <at> ag.or.at> writes:

> The tiff specification requires the TIFFTAG_EXTRASAMPLES tag to be written if 
> SamplesPerPixel is larger than what PhotometricInterpretation would indicate.

This is missing the (trivial) change to tiff.h:

diff --git a/libavcodec/tiff.h b/libavcodec/tiff.h
index 0abeb8c..6d760f0 100644
--- a/libavcodec/tiff.h
+++ b/libavcodec/tiff.h
@@ -69,6 +69,7 @@ enum TiffTags{
     TIFF_TILE_LENGTH = 0x143,
     TIFF_TILE_OFFSETS = 0x144,
     TIFF_TILE_BYTE_COUNTS = 0x145,
+    TIFF_EXTRASAMPLES = 0x152,
     TIFF_YCBCR_COEFFICIENTS = 0x211,
     TIFF_YCBCR_SUBSAMPLING = 0x212,
     TIFF_YCBCR_POSITIONING = 0x213,