From 94658cd808516e573289db086f3e65a47cc28dab Mon Sep 17 00:00:00 2001
From: kieran <kieran@harkin.me>
Date: Thu, 21 Nov 2024 10:41:06 +0000
Subject: [PATCH] fix: get_frame_duration

---
 build.rs   |  4 ----
 src/lib.rs | 13 +++++++++++++
 2 files changed, 13 insertions(+), 4 deletions(-)

diff --git a/build.rs b/build.rs
index eedefd3..c3327c5 100644
--- a/build.rs
+++ b/build.rs
@@ -8,10 +8,6 @@ fn main() {
             let feature_name = name["DEP_FFMPEG_".len()..name.len()].to_lowercase();
             println!(r#"cargo::rustc-check-cfg=cfg(feature, values("{feature_name}"))"#);
             println!(r#"cargo::rustc-cfg=feature="{feature_name}""#);
-            println!(
-                r#"cargo::rustc-env=DEP_FFMPEG_{}=1"#,
-                feature_name.to_uppercase()
-            );
         }
     }
 }
diff --git a/src/lib.rs b/src/lib.rs
index fc81c7c..3899ef5 100644
--- a/src/lib.rs
+++ b/src/lib.rs
@@ -62,6 +62,19 @@ macro_rules! rstr {
     };
 }
 
+/// Version dependant [AVFrame].duration
+pub unsafe fn get_frame_duration(frame: *mut AVFrame) -> i64 {
+    #[cfg(feature = "avutil_version_greater_than_57_30")]
+    return (*frame).duration;
+    #[cfg(feature = "avcodec_version_greater_than_54_24")]
+    return (*frame).pkt_duration;
+    #[cfg(all(
+        not(feature = "avcodec_version_greater_than_54_24"),
+        not(feature = "avutil_version_greater_than_57_30")
+    ))]
+    compile_error!("no frame duration support");
+}
+
 #[cfg(target_os = "macos")]
 type VaList = ffmpeg_sys_the_third::va_list;
 #[cfg(target_os = "linux")]