postproc/tests: Add test for temporal denoise

Sponsored-by: Sovereign Tech Fund
Signed-off-by: Michael Niedermayer <michael@niedermayer.cc>

1 files changed, 120 insertions, 0 deletions

diff --git a/libpostproc/tests/temptest.c b/libpostproc/tests/temptest.c
new file mode 100644
index 0000000000..5396b0da44
--- /dev/null
+++ b/libpostproc/tests/temptest.c
@@ -0,0 +1,120 @@
+/*
+ * 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 "libpostproc/postprocess.h"
+
+typedef const uint8_t *cuint8;
+
+static void stuff(AVFrame *frame, unsigned *state, int mul)
+{
+    for(int y=0; y<frame->height; y++) {
+        for(int x=0; x<frame->width; x++) {
+            *state= *state*1664525+1013904223;
+            frame->data[0][x + y*frame->linesize[0]] = x*x + (y-x)*mul + ((((x+y)&0xFF)* (int64_t)(*state))>>32);
+        }
+    }
+    for(int y=0; y<(frame->height+1)/2; y++) {
+        for(int x=0; x<(frame->width+1)/2; x++) {
+            *state= *state*1664525+1013904223;
+            frame->data[1][x + y*frame->linesize[1]] = x + y + ((mul*(int64_t)(*state))>>32);
+            frame->data[2][x + y*frame->linesize[2]] = mul*x - ((y*x*(int64_t)(*state))>>32);
+        }
+    }
+}
+
+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();
+    pp_context *context = pp_get_context(width, height, flags);
+    pp_mode *mode = pp_get_mode_by_name_and_quality(testname, quality);
+    int64_t ret;
+
+    if (!in || !out || !context || !mode) {
+        ret = AVERROR(ENOMEM);
+        goto end;
+    }
+
+    in-> width = out->width  = width;
+    in->height = out->height = height;
+    in->format = out->format = AV_PIX_FMT_YUV420P;
+
+    ret = av_frame_get_buffer(in, 0);
+    if (ret < 0)
+        goto end;
+
+    ret = av_frame_get_buffer(out, 0);
+    if (ret < 0)
+        goto end;
+
+    unsigned state = mul;
+    for(int f=0; f<10; f++) {
+        stuff(in, &state, mul);
+
+        pp_postprocess( (cuint8[]){in->data[0], in->data[1], in->data[2]}, in->linesize,
+                    out->data, out->linesize,
+                    width, height, NULL, 0,
+                    mode, context, pict_type);
+
+        ret += chksum(out);
+        ret *= 1664525U;
+    }
+end:
+    av_frame_free(&in);
+    av_frame_free(&out);
+    pp_free_context(context);
+    pp_free_mode(mode);
+
+    return ret;
+}
+
+int main(int argc, char **argv) {
+
+    for(int a=0; a<600000; a= 17*a+1) {
+        for(int b=a; b<600000; b= 17*b+1) {
+            for(int c=b; c<600000; c= 17*c+1) {
+                for (int m=0; m<128; m = 3*m+1) {
+                    char buf[100];
+                    snprintf(buf, sizeof(buf), "be,tn:%d:%d:%d", a, b, c);
+                    int64_t ret = test(352, 288, buf, m, PP_FORMAT_420, 0, 11);
+                    printf("temptest %d %d %d %d result %"PRIX64"\n", a,b,c,m, ret);
+                }
+            }
+        }
+    }
+
+    return 0;
+}