Print warnings on ignored clap,irot,imir (#2564)

diff --git a/apps/avifdec.c b/apps/avifdec.c
index 1a6006d..f79c31f 100644
--- a/apps/avifdec.c
+++ b/apps/avifdec.c

@@ -376,7 +376,7 @@
         goto cleanup;
     } else if (outputFormat == AVIF_APP_FILE_FORMAT_Y4M) {
         if (decoder->image->icc.size || decoder->image->exif.size || decoder->image->xmp.size) {
-            printf("Warning: metadata dropped when saving to y4m.\n");
+            fprintf(stderr, "Warning: metadata dropped when saving to y4m.\n");
         }
         if (!y4mWrite(outputFilename, decoder->image)) {
             goto cleanup;

diff --git a/apps/shared/avifjpeg.c b/apps/shared/avifjpeg.c
index de0aa7f..5e10d11 100644
--- a/apps/shared/avifjpeg.c
+++ b/apps/shared/avifjpeg.c

@@ -1297,6 +1297,21 @@
         write_icc_profile(&cinfo, avif->icc.data, (unsigned int)avif->icc.size);
     }
 
+    if (avif->transformFlags & AVIF_TRANSFORM_CLAP) {
+        avifCropRect cropRect;
+        avifDiagnostics diag;
+        if (avifCropRectConvertCleanApertureBox(&cropRect, &avif->clap, avif->width, avif->height, avif->yuvFormat, &diag) &&
+            (cropRect.x != 0 || cropRect.y != 0 || cropRect.width != avif->width || cropRect.height != avif->height)) {
+            // TODO: https://github.com/AOMediaCodec/libavif/issues/2427 - Implement.
+            fprintf(stderr,
+                    "Warning: Clean Aperture values were ignored, the output image was NOT cropped to rectangle {%u,%u,%u,%u}\n",
+                    cropRect.x,
+                    cropRect.y,
+                    cropRect.width,
+                    cropRect.height);
+        }
+    }
+
     if (avif->exif.data && (avif->exif.size > 0)) {
         size_t exifTiffHeaderOffset;
         avifResult result = avifGetExifTiffHeaderOffset(avif->exif.data, avif->exif.size, &exifTiffHeaderOffset);
@@ -1337,7 +1352,10 @@
         avifRWDataFree(&exif);
     } else if (avifImageGetExifOrientationFromIrotImir(avif) != 1) {
         // There is no Exif yet, but we need to store the orientation.
-        // TODO(yguyon): Add a valid Exif payload or rotate the samples.
+        // TODO: https://github.com/AOMediaCodec/libavif/issues/2427 - Add a valid Exif payload or rotate the samples.
+        fprintf(stderr,
+                "Warning: Orientation %u was ignored, the output image was NOT rotated or mirrored\n",
+                avifImageGetExifOrientationFromIrotImir(avif));
     }
 
     if (avif->xmp.data && (avif->xmp.size > 0)) {

diff --git a/apps/shared/avifpng.c b/apps/shared/avifpng.c
index c2f8a47..cb630bf 100644
--- a/apps/shared/avifpng.c
+++ b/apps/shared/avifpng.c

@@ -727,8 +727,26 @@
         rowPointers[y] = row;
         row += rowBytes;
     }
+
+    if (avif->transformFlags & AVIF_TRANSFORM_CLAP) {
+        avifCropRect cropRect;
+        avifDiagnostics diag;
+        if (avifCropRectConvertCleanApertureBox(&cropRect, &avif->clap, avif->width, avif->height, avif->yuvFormat, &diag) &&
+            (cropRect.x != 0 || cropRect.y != 0 || cropRect.width != avif->width || cropRect.height != avif->height)) {
+            // TODO: https://github.com/AOMediaCodec/libavif/issues/2427 - Implement.
+            fprintf(stderr,
+                    "Warning: Clean Aperture values were ignored, the output image was NOT cropped to rectangle {%u,%u,%u,%u}\n",
+                    cropRect.x,
+                    cropRect.y,
+                    cropRect.width,
+                    cropRect.height);
+        }
+    }
     if (avifImageGetExifOrientationFromIrotImir(avif) != 1) {
-        // TODO(yguyon): Rotate the samples.
+        // TODO: https://github.com/AOMediaCodec/libavif/issues/2427 - Rotate the samples.
+        fprintf(stderr,
+                "Warning: Orientation %u was ignored, the output image was NOT rotated or mirrored\n",
+                avifImageGetExifOrientationFromIrotImir(avif));
     }
 
     if (rgbDepth > 8) {

diff --git a/apps/shared/y4m.c b/apps/shared/y4m.c
index afdb59f..f569122 100644
--- a/apps/shared/y4m.c
+++ b/apps/shared/y4m.c

@@ -13,6 +13,7 @@
 #include <string.h>
 
 #include "avif/avif.h"
+#include "avifexif.h"
 #include "avifutil.h"
 
 #define Y4M_MAX_LINE_SIZE 2048 // Arbitrary limit. Y4M headers should be much smaller than this
@@ -492,6 +493,27 @@
         fprintf(stderr, "WARNING: writing alpha is currently only supported in 8bpc YUV444, ignoring alpha channel: %s\n", outputFilename);
     }
 
+    if (avif->transformFlags & AVIF_TRANSFORM_CLAP) {
+        avifCropRect cropRect;
+        avifDiagnostics diag;
+        if (avifCropRectConvertCleanApertureBox(&cropRect, &avif->clap, avif->width, avif->height, avif->yuvFormat, &diag) &&
+            (cropRect.x != 0 || cropRect.y != 0 || cropRect.width != avif->width || cropRect.height != avif->height)) {
+            // TODO: https://github.com/AOMediaCodec/libavif/issues/2427 - Implement.
+            fprintf(stderr,
+                    "Warning: Clean Aperture values were ignored, the output image was NOT cropped to rectangle {%u,%u,%u,%u}\n",
+                    cropRect.x,
+                    cropRect.y,
+                    cropRect.width,
+                    cropRect.height);
+        }
+    }
+    if (avifImageGetExifOrientationFromIrotImir(avif) != 1) {
+        // TODO: https://github.com/AOMediaCodec/libavif/issues/2427 - Rotate the samples.
+        fprintf(stderr,
+                "Warning: Orientation %u was ignored, the output image was NOT rotated or mirrored\n",
+                avifImageGetExifOrientationFromIrotImir(avif));
+    }
+
     switch (avif->depth) {
         case 8:
             switch (avif->yuvFormat) {