lavc/tiff: Support decoding 16bit cmyk.

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];
+            }
         }
     }
 

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, \