tests/fate/libavutil: add FATE test for tdrdi

Test av_tdrdi_alloc with 1 and 3 displays, and the inline
av_tdrdi_get_display accessor. Verifies that the returned
pointer matches entries_offset + idx * entry_size, tests
write/read-back of display width exponent/mantissa and view ID
fields, and OOM paths via av_max_alloc.

Coverage for libavutil/tdrdi.c: 0.00% -> 100.00%

.forgejo/CODEOWNERS

@@ -234,10 +234,12 @@ doc/.* @GyanD
 tests/checkasm/riscv/.* @Courmisch
 libavutil/tests/buffer.* @MarcosAsh
 libavutil/tests/hdr_dynamic_vivid_metadata.* @MarcosAsh
+libavutil/tests/tdrdi.* @MarcosAsh
 tests/ref/.*drawvg.* @ayosec
 tests/ref/fate/buffer @MarcosAsh
 tests/ref/fate/hdr_dynamic_vivid_metadata @MarcosAsh
 tests/ref/fate/sub-mcc.* @programmerjake
+tests/ref/fate/tdrdi @MarcosAsh
 
 # Forgejo
 # =======

libavutil/Makefile

@@ -309,6 +309,7 @@ TESTPROGS = adler32                                                     \
             softfloat                                                   \
             spherical                                                   \
             stereo3d                                                    \
+            tdrdi                                                       \
             timecode                                                    \
             tree                                                        \
             twofish                                                     \

libavutil/tests/tdrdi.c

@@ -0,0 +1,92 @@
+/*
+ * This file is part of FFmpeg.
+ *
+ * FFmpeg is free software; you can redistribute it and/or
+ * modify it under the terms of the GNU Lesser General Public
+ * License as published by the Free Software Foundation; either
+ * version 2.1 of the License, or (at your option) any later version.
+ *
+ * FFmpeg is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
+ * Lesser General Public License for more details.
+ *
+ * You should have received a copy of the GNU Lesser General Public
+ * License along with FFmpeg; if not, write to the Free Software
+ * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA
+ */
+
+#include <limits.h>
+#include <stdint.h>
+#include <stdio.h>
+
+#include "libavutil/mem.h"
+#include "libavutil/tdrdi.h"
+
+int main(void)
+{
+    AV3DReferenceDisplaysInfo *tdrdi;
+    AV3DReferenceDisplay *display;
+    size_t size;
+
+    /* av_tdrdi_alloc with 1 display */
+    printf("Testing av_tdrdi_alloc()\n");
+    tdrdi = av_tdrdi_alloc(1, &size);
+    if (tdrdi) {
+        printf("alloc 1: size>0=%s, num_ref_displays=%u\n",
+               size > 0 ? "yes" : "no", tdrdi->num_ref_displays);
+
+        display = av_tdrdi_get_display(tdrdi, 0);
+        /* pointer consistency check */
+        if ((uint8_t *)display != (uint8_t *)tdrdi + tdrdi->entries_offset)
+            printf("display 0: pointer inconsistent with entries_offset\n");
+
+        /* write and read back */
+        display->exponent_ref_display_width = 3;
+        display->mantissa_ref_display_width = 100;
+        display->left_view_id = 0;
+        display->right_view_id = 1;
+        display = av_tdrdi_get_display(tdrdi, 0);
+        printf("display 0: width_exp=%u width_man=%u left=%u right=%u\n",
+               display->exponent_ref_display_width,
+               display->mantissa_ref_display_width,
+               display->left_view_id, display->right_view_id);
+        av_free(tdrdi);
+    }
+
+    /* alloc with multiple displays */
+    printf("\nTesting multiple displays\n");
+    tdrdi = av_tdrdi_alloc(3, &size);
+    if (tdrdi) {
+        printf("alloc 3: num_ref_displays=%u\n", tdrdi->num_ref_displays);
+        for (int i = 0; i < 3; i++) {
+            display = av_tdrdi_get_display(tdrdi, i);
+            /* verify stride consistency */
+            if ((uint8_t *)display != (uint8_t *)tdrdi + tdrdi->entries_offset +
+                                      (size_t)i * tdrdi->entry_size)
+                printf("display %d: pointer inconsistent\n", i);
+            display->exponent_ref_display_width = i + 1;
+        }
+        for (int i = 0; i < 3; i++) {
+            display = av_tdrdi_get_display(tdrdi, i);
+            printf("display %d: width_exp=%u\n", i,
+                   display->exponent_ref_display_width);
+        }
+        av_free(tdrdi);
+    }
+
+    /* alloc with NULL size */
+    tdrdi = av_tdrdi_alloc(1, NULL);
+    printf("\nalloc (no size): %s\n", tdrdi ? "OK" : "FAIL");
+    av_free(tdrdi);
+
+    /* OOM paths via av_max_alloc */
+    printf("\nTesting OOM paths\n");
+    av_max_alloc(1);
+    tdrdi = av_tdrdi_alloc(1, &size);
+    printf("alloc OOM: %s\n", tdrdi ? "FAIL" : "OK");
+    av_free(tdrdi);
+    av_max_alloc(INT_MAX);
+
+    return 0;
+}

tests/fate/libavutil.mak

@@ -188,6 +188,10 @@ FATE_LIBAVUTIL += fate-stereo3d
 fate-stereo3d: libavutil/tests/stereo3d$(EXESUF)
 fate-stereo3d: CMD = run libavutil/tests/stereo3d$(EXESUF)
 
+FATE_LIBAVUTIL += fate-tdrdi
+fate-tdrdi: libavutil/tests/tdrdi$(EXESUF)
+fate-tdrdi: CMD = run libavutil/tests/tdrdi$(EXESUF)
+
 FATE_LIBAVUTIL += fate-tree
 fate-tree: libavutil/tests/tree$(EXESUF)
 fate-tree: CMD = run libavutil/tests/tree$(EXESUF)

tests/ref/fate/tdrdi

@@ -0,0 +1,14 @@
+Testing av_tdrdi_alloc()
+alloc 1: size>0=yes, num_ref_displays=1
+display 0: width_exp=3 width_man=100 left=0 right=1
+
+Testing multiple displays
+alloc 3: num_ref_displays=3
+display 0: width_exp=1
+display 1: width_exp=2
+display 2: width_exp=3
+
+alloc (no size): OK
+
+Testing OOM paths
+alloc OOM: OK