From 67e2d9f9e1b8718406b3081751a57f3575823e0e Mon Sep 17 00:00:00 2001
From: Max Kellermann <max@duempel.org>
Date: Fri, 19 Dec 2014 09:41:21 +0100
Subject: decoder/ffmpeg: move code to lib/ffmpeg/Time.hxx
---
src/lib/ffmpeg/Time.hxx | 76 +++++++++++++++++++++++++++++++++++++++++++++++++
1 file changed, 76 insertions(+)
create mode 100644 src/lib/ffmpeg/Time.hxx
(limited to 'src/lib/ffmpeg')
diff --git a/src/lib/ffmpeg/Time.hxx b/src/lib/ffmpeg/Time.hxx
new file mode 100644
index 000000000..fb845d7d9
--- /dev/null
+++ b/src/lib/ffmpeg/Time.hxx
@@ -0,0 +1,76 @@
+/*
+ * Copyright (C) 2003-2014 The Music Player Daemon Project
+ * http://www.musicpd.org
+ *
+ * This program is free software; you can redistribute it and/or modify
+ * it under the terms of the GNU General Public License as published by
+ * the Free Software Foundation; either version 2 of the License, or
+ * (at your option) any later version.
+ *
+ * This program 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 General Public License for more details.
+ *
+ * You should have received a copy of the GNU General Public License along
+ * with this program; if not, write to the Free Software Foundation, Inc.,
+ * 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA.
+ */
+
+#ifndef MPD_FFMPEG_TIME_HXX
+#define MPD_FFMPEG_TIME_HXX
+
+#include "Chrono.hxx"
+#include "Compiler.h"
+
+extern "C" {
+#include <libavutil/avutil.h>
+#include <libavutil/mathematics.h>
+}
+
+#include <assert.h>
+#include <stdint.h>
+
+/* suppress the ffmpeg compatibility macro */
+#ifdef SampleFormat
+#undef SampleFormat
+#endif
+
+gcc_const
+static inline double
+FfmpegTimeToDouble(int64_t t, const AVRational time_base)
+{
+ assert(t != (int64_t)AV_NOPTS_VALUE);
+
+ return (double)av_rescale_q(t, time_base, (AVRational){1, 1024})
+ / (double)1024;
+}
+
+template<typename Ratio>
+static inline constexpr AVRational
+RatioToAVRational()
+{
+ return { Ratio::num, Ratio::den };
+}
+
+gcc_const
+static inline int64_t
+ToFfmpegTime(SongTime t, const AVRational time_base)
+{
+ return av_rescale_q(t.count(),
+ RatioToAVRational<SongTime::period>(),
+ time_base);
+}
+
+/**
+ * Replace #AV_NOPTS_VALUE with the given fallback.
+ */
+static constexpr int64_t
+FfmpegTimestampFallback(int64_t t, int64_t fallback)
+{
+ return gcc_likely(t != int64_t(AV_NOPTS_VALUE))
+ ? t
+ : fallback;
+}
+
+#endif
--
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