libpostproc/tests: Factor ff_chksum() out

Signed-off-by: Michael Niedermayer <michael@niedermayer.cc>

libpostproc/Makefile

@@ -9,9 +9,15 @@ HEADERS = postprocess.h        \
 OBJS = postprocess.o           \
        version.o               \
 
+TESTOBJS = tests/test_utils.o        \
+
 # Windows resource file
 SHLIBOBJS-$(HAVE_GNU_WINDRES) += postprocres.o
 
 TESTPROGS = blocktest          \
             stripetest         \
             temptest	       \
+
+$(SUBDIR)tests/blocktest$(EXESUF):  $(SUBDIR)tests/test_utils.o
+$(SUBDIR)tests/stripetest$(EXESUF): $(SUBDIR)tests/test_utils.o
+$(SUBDIR)tests/temptest$(EXESUF):  $(SUBDIR)tests/test_utils.o

libpostproc/tests/blocktest.c

@@ -21,6 +21,7 @@
 #include "libavutil/frame.h"
 #include "libavutil/adler32.h"
 #include "libpostproc/postprocess.h"
+#include "test_utils.h"
 
 typedef const uint8_t *cuint8;
 
@@ -39,21 +40,6 @@ static void blocks(AVFrame *frame, int blocksize, int mul)
     }
 }
 
-static int64_t chksum(AVFrame *f)
-{
-    AVAdler a = 123;
-
-    for(int y=0; y<f->height; y++) {
-        a = av_adler32_update(a, &f->data[0][y*f->linesize[0]], f->width);
-    }
-    for(int y=0; y<(f->height+1)/2; y++) {
-        a = av_adler32_update(a, &f->data[1][y*f->linesize[1]], (f->width+1)/2);
-        a = av_adler32_update(a, &f->data[2][y*f->linesize[2]], (f->width+1)/2);
-    }
-
-    return a;
-}
-
 static int64_t test(int width, int height, const char * filter_string, int blocksize, int flags, int pict_type, int quality) {
     AVFrame *in  = av_frame_alloc();
     AVFrame *out = av_frame_alloc();
@@ -90,7 +76,7 @@ static int64_t test(int width, int height, const char * filter_string, int block
                    width, height, qp, QP_STRIDE,
                    mode, context, pict_type);
 
-    ret = chksum(out);
+    ret = ff_chksum(out);
 end:
     av_frame_free(&in);
     av_frame_free(&out);

libpostproc/tests/stripetest.c

@@ -21,6 +21,7 @@
 #include "libavutil/frame.h"
 #include "libavutil/adler32.h"
 #include "libpostproc/postprocess.h"
+#include "test_utils.h"
 
 typedef const uint8_t *cuint8;
 
@@ -48,21 +49,6 @@ static void strips(AVFrame *frame, int mul)
     }
 }
 
-static int64_t chksum(AVFrame *f)
-{
-    AVAdler a = 123;
-
-    for(int y=0; y<f->height; y++) {
-        a = av_adler32_update(a, &f->data[0][y*f->linesize[0]], f->width);
-    }
-    for(int y=0; y<(f->height+1)/2; y++) {
-        a = av_adler32_update(a, &f->data[1][y*f->linesize[1]], (f->width+1)/2);
-        a = av_adler32_update(a, &f->data[2][y*f->linesize[2]], (f->width+1)/2);
-    }
-
-    return a;
-}
-
 static int64_t test(int width, int height, const char *testname, int mul, int flags, int pict_type, int quality) {
     AVFrame *in  = av_frame_alloc();
     AVFrame *out = av_frame_alloc();
@@ -94,7 +80,7 @@ static int64_t test(int width, int height, const char *testname, int mul, int fl
                    width, height, NULL, 0,
                    mode, context, pict_type);
 
-    ret = chksum(out);
+    ret = ff_chksum(out);
 end:
     av_frame_free(&in);
     av_frame_free(&out);

libpostproc/tests/temptest.c

@@ -21,6 +21,7 @@
 #include "libavutil/frame.h"
 #include "libavutil/adler32.h"
 #include "libpostproc/postprocess.h"
+#include "test_utils.h"
 
 typedef const uint8_t *cuint8;
 
@@ -41,21 +42,6 @@ static void stuff(AVFrame *frame, unsigned *state, int mul)
     }
 }
 
-static int64_t chksum(AVFrame *f)
-{
-    AVAdler a = 123;
-
-    for(int y=0; y<f->height; y++) {
-        a = av_adler32_update(a, &f->data[0][y*f->linesize[0]], f->width);
-    }
-    for(int y=0; y<(f->height+1)/2; y++) {
-        a = av_adler32_update(a, &f->data[1][y*f->linesize[1]], (f->width+1)/2);
-        a = av_adler32_update(a, &f->data[2][y*f->linesize[2]], (f->width+1)/2);
-    }
-
-    return a;
-}
-
 static int64_t test(int width, int height, const char *testname, int mul, int flags, int pict_type, int quality) {
     AVFrame *in  = av_frame_alloc();
     AVFrame *out = av_frame_alloc();
@@ -89,7 +75,7 @@ static int64_t test(int width, int height, const char *testname, int mul, int fl
                     width, height, NULL, 0,
                     mode, context, pict_type);
 
-        ret += chksum(out);
+        ret += ff_chksum(out);
         ret *= 1664525U;
     }
 end:

libpostproc/tests/test_utils.c

@@ -0,0 +1,38 @@
+/*
+ * Copyright (c) 2025 Michael Niedermayer
+ *
+ * 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 "libavutil/frame.h"
+#include "libavutil/adler32.h"
+#include "test_utils.h"
+
+int64_t ff_chksum(AVFrame *f)
+{
+    AVAdler a = 123;
+
+    for(int y=0; y<f->height; y++) {
+        a = av_adler32_update(a, &f->data[0][y*f->linesize[0]], f->width);
+    }
+    for(int y=0; y<(f->height+1)/2; y++) {
+        a = av_adler32_update(a, &f->data[1][y*f->linesize[1]], (f->width+1)/2);
+        a = av_adler32_update(a, &f->data[2][y*f->linesize[2]], (f->width+1)/2);
+    }
+
+    return a;
+}

libpostproc/tests/test_utils.h

@@ -0,0 +1,27 @@
+/*
+ * Copyright (c) 2025 Michael Niedermayer
+ *
+ * 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
+ */
+
+
+#ifndef POSTPROC_TESTS_TEST_UTILS_H
+#define POSTPROC_TESTS_TEST_UTILS_H
+
+int64_t ff_chksum(AVFrame *f);
+
+#endif /* POSTPROC_TESTS_TEST_UTILS_H */