avformat/tests: add test for ff_rescale_interval()

Signed-off-by: Zane van Iperen <zane@zanevaniperen.com>

libavformat/Makefile

@@ -711,6 +711,7 @@ SKIPHEADERS-$(CONFIG_NETWORK)            += network.h rtsp.h
 
 TESTPROGS = seek                                                        \
             url                                                         \
+            seek_utils
 #           async                                                       \
 
 FIFO-MUXER-TESTPROGS-$(CONFIG_NETWORK)   += fifo_muxer

libavformat/tests/.gitignore

@@ -6,3 +6,4 @@
 /seek
 /srtp
 /url
+/seek_utils

libavformat/tests/seek_utils.c

@@ -0,0 +1,57 @@
+/*
+ * Copyright (c) 2022 Pierre-Anthony Lemieux <pal@palemieux.com>
+ *
+ * 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 "libavformat/internal.h"
+
+int main(void)
+{
+  int64_t ts_min;
+  int64_t ts;
+  int64_t ts_max;
+
+  ts_min = 10;
+  ts     = 20;
+  ts_max = 30;
+
+  ff_rescale_interval(av_make_q(1, 1), av_make_q(10, 1), &ts_min, &ts, &ts_max);
+
+  if (ts_min != 1 || ts != 2 || ts_max != 3)
+    return 1;
+
+  ts_min = 10;
+  ts     = 32;
+  ts_max = 32;
+
+  ff_rescale_interval(av_make_q(1, 1), av_make_q(3, 1), &ts_min, &ts, &ts_max);
+
+  if (ts_min != 4 || ts != 11 || ts_max != 10)
+    return 1;
+
+  ts_min = 10;
+  ts     = 10;
+  ts_max = 32;
+
+  ff_rescale_interval(av_make_q(1, 1), av_make_q(3, 1), &ts_min, &ts, &ts_max);
+
+  if (ts_min != 4 || ts != 3 || ts_max != 10)
+    return 1;
+
+  return 0;
+}

tests/fate/libavformat.mak

@@ -26,6 +26,11 @@ FATE_LIBAVFORMAT-$(CONFIG_IMF_DEMUXER) += fate-imf
 fate-imf: libavformat/tests/imf$(EXESUF)
 fate-imf: CMD = run libavformat/tests/imf$(EXESUF)
 
+FATE_LIBAVFORMAT += fate-seek_utils
+fate-seek_utils: libavformat/tests/seek_utils$(EXESUF)
+fate-seek_utils: CMD = run libavformat/tests/seek_utils$(EXESUF)
+fate-seek_utils: CMP = null
+
 FATE_LIBAVFORMAT += $(FATE_LIBAVFORMAT-yes)
 FATE-$(CONFIG_AVFORMAT) += $(FATE_LIBAVFORMAT)
 fate-libavformat: $(FATE_LIBAVFORMAT)