[FFmpeg-cvslog] lavc/tiff: Support decoding 16bit cmyk.

[Carl Eugen Hoyos]

ffmpeg | branch: master | Carl Eugen Hoyos <ceffmpeg at gmail.com> | Sat Mar  9 11:05:36 2019 +0100| [6fcf7adc019b29926ce7b096640cfdf714074bcd] | committer: Carl Eugen Hoyos

lavc/tiff: Support decoding 16bit cmyk.

> http://git.videolan.org/gitweb.cgi/ffmpeg.git/?a=commit;h=6fcf7adc019b29926ce7b096640cfdf714074bcd
---

 libavcodec/tiff.c    | 16 ++++++++++++++++
 libavcodec/version.h |  2 +-
 2 files changed, 17 insertions(+), 1 deletion(-)

diff --git a/libavcodec/tiff.c b/libavcodec/tiff.c
index 112f5b52f4..828ed9e2e9 100644
--- a/libavcodec/tiff.c
+++ b/libavcodec/tiff.c
@@ -1547,6 +1547,22 @@ again:
                 }
                 dst += p->linesize[plane];
             }
+        } else if (s->photometric == TIFF_PHOTOMETRIC_SEPARATED &&
+            s->avctx->pix_fmt == AV_PIX_FMT_RGBA64BE) {
+            dst = p->data[plane];
+            for (i = 0; i < s->height; i++) {
+                for (j = 0; j < s->width; j++) {
+                    uint64_t k =  65535 - AV_RB16(dst + 8 * j + 6);
+                    uint64_t r = (65535 - AV_RB16(dst + 8 * j    )) * k;
+                    uint64_t g = (65535 - AV_RB16(dst + 8 * j + 2)) * k;
+                    uint64_t b = (65535 - AV_RB16(dst + 8 * j + 4)) * k;
+                    AV_WB16(dst + 8 * j    , r * 65537 >> 32);
+                    AV_WB16(dst + 8 * j + 2, g * 65537 >> 32);
+                    AV_WB16(dst + 8 * j + 4, b * 65537 >> 32);
+                    AV_WB16(dst + 8 * j + 6, 65535);
+                }
+                dst += p->linesize[plane];
+            }
         }
     }
 
diff --git a/libavcodec/version.h b/libavcodec/version.h
index 309e4111cb..a217283b03 100644
--- a/libavcodec/version.h
+++ b/libavcodec/version.h
@@ -29,7 +29,7 @@
 
 #define LIBAVCODEC_VERSION_MAJOR  58
 #define LIBAVCODEC_VERSION_MINOR  47
-#define LIBAVCODEC_VERSION_MICRO 103
+#define LIBAVCODEC_VERSION_MICRO 104
 
 #define LIBAVCODEC_VERSION_INT  AV_VERSION_INT(LIBAVCODEC_VERSION_MAJOR, \
                                                LIBAVCODEC_VERSION_MINOR, \