Merge commit 'd12b5b2f135aade4099f4b26b0fe678656158c13'

* commit 'd12b5b2f135aade4099f4b26b0fe678656158c13':
  build: Split test programs off into separate files

Some conversions done by: James Almer <jamrial@gmail.com>
Merged-by: Derek Buitenhuis <derek.buitenhuis@gmail.com>

1 files changed, 135 insertions, 0 deletions

diff --git a/libavutil/rational-test.c b/libavutil/rational-test.c
new file mode 100644
index 0000000000..455d9c42b2
--- /dev/null
+++ b/libavutil/rational-test.c
@@ -0,0 +1,135 @@
+/*
+ * rational numbers
+ * Copyright (c) 2003 Michael Niedermayer <michaelni@gmx.at>
+ *
+ * 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 "rational.c"
+
+#include "integer.h"
+
+int main(void)
+{
+    AVRational a,b,r;
+    int i,j,k;
+    static const int64_t numlist[] = {
+        INT64_MIN, INT64_MIN+1, INT64_MAX, INT32_MIN, INT32_MAX, 1,0,-1,
+        123456789, INT32_MAX-1, INT32_MAX+1LL, UINT32_MAX-1, UINT32_MAX, UINT32_MAX+1LL
+    };
+
+    for (a.num = -2; a.num <= 2; a.num++) {
+        for (a.den = -2; a.den <= 2; a.den++) {
+            for (b.num = -2; b.num <= 2; b.num++) {
+                for (b.den = -2; b.den <= 2; b.den++) {
+                    int c = av_cmp_q(a,b);
+                    double d = av_q2d(a) == av_q2d(b) ?
+                               0 : (av_q2d(a) - av_q2d(b));
+                    if (d > 0)       d = 1;
+                    else if (d < 0)  d = -1;
+                    else if (d != d) d = INT_MIN;
+                    if (c != d)
+                        av_log(NULL, AV_LOG_ERROR, "%d/%d %d/%d, %d %f\n", a.num,
+                               a.den, b.num, b.den, c,d);
+                    r = av_sub_q(av_add_q(b,a), b);
+                    if(b.den && (r.num*a.den != a.num*r.den || !r.num != !a.num || !r.den != !a.den))
+                        av_log(NULL, AV_LOG_ERROR, "%d/%d ", r.num, r.den);
+                }
+            }
+        }
+    }
+
+    for (i = 0; i < FF_ARRAY_ELEMS(numlist); i++) {
+        int64_t a = numlist[i];
+
+        for (j = 0; j < FF_ARRAY_ELEMS(numlist); j++) {
+            int64_t b = numlist[j];
+            if (b<=0)
+                continue;
+            for (k = 0; k < FF_ARRAY_ELEMS(numlist); k++) {
+                int64_t c = numlist[k];
+                int64_t res;
+                AVInteger ai;
+
+                if (c<=0)
+                    continue;
+                res = av_rescale_rnd(a,b,c, AV_ROUND_ZERO);
+
+                ai = av_mul_i(av_int2i(a), av_int2i(b));
+                ai = av_div_i(ai, av_int2i(c));
+
+                if (av_cmp_i(ai, av_int2i(INT64_MAX)) > 0 && res == INT64_MIN)
+                    continue;
+                if (av_cmp_i(ai, av_int2i(INT64_MIN)) < 0 && res == INT64_MIN)
+                    continue;
+                if (av_cmp_i(ai, av_int2i(res)) == 0)
+                    continue;
+
+                // Special exception for INT64_MIN, remove this in case INT64_MIN is handled without off by 1 error
+                if (av_cmp_i(ai, av_int2i(res-1)) == 0 && a == INT64_MIN)
+                    continue;
+
+                av_log(NULL, AV_LOG_ERROR, "%"PRId64" * %"PRId64" / %"PRId64" = %"PRId64" or %"PRId64"\n", a,b,c, res, av_i2int(ai));
+            }
+        }
+    }
+
+    for (a.num = 1; a.num <= 10; a.num++) {
+        for (a.den = 1; a.den <= 10; a.den++) {
+            if (av_gcd(a.num, a.den) > 1)
+                continue;
+            for (b.num = 1; b.num <= 10; b.num++) {
+                for (b.den = 1; b.den <= 10; b.den++) {
+                    int start;
+                    if (av_gcd(b.num, b.den) > 1)
+                        continue;
+                    if (av_cmp_q(b, a) < 0)
+                        continue;
+                    for (start = 0; start < 10 ; start++) {
+                        int acc= start;
+                        int i;
+
+                        for (i = 0; i<100; i++) {
+                            int exact = start + av_rescale_q(i+1, b, a);
+                            acc = av_add_stable(a, acc, b, 1);
+                            if (FFABS(acc - exact) > 2) {
+                                av_log(NULL, AV_LOG_ERROR, "%d/%d %d/%d, %d %d\n", a.num,
+                                       a.den, b.num, b.den, acc, exact);
+                                return 1;
+                            }
+                        }
+                    }
+                }
+            }
+        }
+    }
+
+    for (a.den = 1; a.den < 0x100000000U/3; a.den*=3) {
+        for (a.num = -1; a.num < (1<<27); a.num += 1 + a.num/100) {
+            float f  = av_int2float(av_q2intfloat(a));
+            float f2 = av_q2d(a);
+            if (fabs(f - f2) > fabs(f)/5000000) {
+                av_log(NULL, AV_LOG_ERROR, "%d/%d %f %f\n", a.num,
+                       a.den, f, f2);
+                return 1;
+            }
+
+        }
+    }
+
+    return 0;
+}