From d3270133be3d3c5f58c93dfa65028e657192c796 Mon Sep 17 00:00:00 2001
From: Zhiming Wang <i@zhimingwang.org>
Date: Mon, 3 Aug 2020 18:46:49 +0800
Subject: [PATCH] Add log::util module

---
 src/util/log/flag.rs  |  9 ++++++++
 src/util/log/level.rs | 54 +++++++++++++++++++++++++++++++++++++++++++
 src/util/log/mod.rs   | 24 +++++++++++++++++++
 src/util/mod.rs       |  1 +
 4 files changed, 88 insertions(+)
 create mode 100644 src/util/log/flag.rs
 create mode 100644 src/util/log/level.rs
 create mode 100644 src/util/log/mod.rs

diff --git a/src/util/log/flag.rs b/src/util/log/flag.rs
new file mode 100644
index 0000000..fa26506
--- /dev/null
+++ b/src/util/log/flag.rs
@@ -0,0 +1,9 @@
+use ffi::*;
+use libc::c_int;
+
+bitflags! {
+    pub struct Flags: c_int {
+        const SKIP_REPEATED = AV_LOG_SKIP_REPEATED;
+        const PRINT_LEVEL = AV_LOG_PRINT_LEVEL;
+    }
+}
diff --git a/src/util/log/level.rs b/src/util/log/level.rs
new file mode 100644
index 0000000..c79aad7
--- /dev/null
+++ b/src/util/log/level.rs
@@ -0,0 +1,54 @@
+use std::convert::TryFrom;
+
+use ffi::*;
+use libc::c_int;
+
+#[derive(Eq, PartialEq, Clone, Copy, Debug)]
+pub enum Level {
+    Quiet,
+    Panic,
+    Fatal,
+    Error,
+    Warning,
+    Info,
+    Verbose,
+    Debug,
+    Trace,
+}
+
+pub struct LevelError;
+
+impl TryFrom<c_int> for Level {
+    type Error = &'static str;
+
+    fn try_from(value: c_int) -> Result<Self, &'static str> {
+        match value {
+            AV_LOG_QUIET => Ok(Level::Quiet),
+            AV_LOG_PANIC => Ok(Level::Panic),
+            AV_LOG_FATAL => Ok(Level::Fatal),
+            AV_LOG_ERROR => Ok(Level::Error),
+            AV_LOG_WARNING => Ok(Level::Warning),
+            AV_LOG_INFO => Ok(Level::Info),
+            AV_LOG_VERBOSE => Ok(Level::Verbose),
+            AV_LOG_DEBUG => Ok(Level::Debug),
+            AV_LOG_TRACE => Ok(Level::Trace),
+            _ => Err("illegal log level"),
+        }
+    }
+}
+
+impl Into<c_int> for Level {
+    fn into(self) -> c_int {
+        match self {
+            Level::Quiet => AV_LOG_QUIET,
+            Level::Panic => AV_LOG_PANIC,
+            Level::Fatal => AV_LOG_FATAL,
+            Level::Error => AV_LOG_ERROR,
+            Level::Warning => AV_LOG_WARNING,
+            Level::Info => AV_LOG_INFO,
+            Level::Verbose => AV_LOG_VERBOSE,
+            Level::Debug => AV_LOG_DEBUG,
+            Level::Trace => AV_LOG_TRACE,
+        }
+    }
+}
diff --git a/src/util/log/mod.rs b/src/util/log/mod.rs
new file mode 100644
index 0000000..69bc4c7
--- /dev/null
+++ b/src/util/log/mod.rs
@@ -0,0 +1,24 @@
+pub mod level;
+pub use self::level::Level;
+
+pub mod flag;
+pub use self::flag::Flags;
+
+use ffi::*;
+use std::convert::TryInto;
+
+pub fn set_level(value: Level) {
+    unsafe { av_log_set_level(value.into()) }
+}
+
+pub fn get_level() -> Result<Level, &'static str> {
+    unsafe { av_log_get_level().try_into() }
+}
+
+pub fn set_flags(value: Flags) {
+    unsafe { av_log_set_flags(value.bits()) }
+}
+
+pub fn get_flags() -> Flags {
+    unsafe { Flags::from_bits_truncate(av_log_get_flags()) }
+}
diff --git a/src/util/mod.rs b/src/util/mod.rs
index 1a50077..1df872d 100644
--- a/src/util/mod.rs
+++ b/src/util/mod.rs
@@ -7,6 +7,7 @@ pub mod error;
 pub mod format;
 pub mod frame;
 pub mod interrupt;
+pub mod log;
 pub mod mathematics;
 pub mod media;
 pub mod option;