From 2a36a68ebea7ed32de306fcba2b8aa84ce34fa0c Mon Sep 17 00:00:00 2001
From: Nicholas Young <nickiel@nickiel.net>
Date: Fri, 18 Oct 2024 22:38:19 -0700
Subject: [PATCH] Added gstreamer app to build tree

---
 build.zig | 7 +++++++
 flake.nix | 2 ++
 2 files changed, 9 insertions(+)

diff --git a/build.zig b/build.zig
index bb361ab..7cfdcb7 100644
--- a/build.zig
+++ b/build.zig
@@ -25,6 +25,7 @@ pub fn build(b: *std.Build) void {
 
     // These environment vars are set with the `nix develop` command
     const gst_dev_path = b.graph.env_map.get("GST_DEV_PATH");  
+    const gst_plugins_base_path = b.graph.env_map.get("GST_PLUGINS_BASE_PATH");
     const glib_dev_path = b.graph.env_map.get("GLIB_DEV_PATH");
     const glib_path = b.graph.env_map.get("GLIB_PATH");
 
@@ -32,6 +33,10 @@ pub fn build(b: *std.Build) void {
         std.debug.panic("GST_DEV_PATH environment variable was not set. Has the nix flake been updated? This should point at the gstreamer.XXX-dev folder", .{});
     }
 
+    if (gst_plugins_base_path == null) {
+    	std.debug.panic("GST_PLUGINS_DEV_PATH environment variable was not set. Has the nix flake been updated? This should point at the gst_all_1.gst-plugins-base.dev folder", .{});
+    }
+
     if (glib_dev_path == null) {
         std.debug.panic("GLIB_DEV_PATH environment variable was not set. Has the nix flake been updated? This should point at the glib.XXX-dev folder", .{});
     }
@@ -43,6 +48,7 @@ pub fn build(b: *std.Build) void {
     exe.linkSystemLibrary("c");
     exe.addIncludePath(.{ .cwd_relative = b.fmt("{s}/include/gstreamer-1.0", .{gst_dev_path.?}) });     // not sure why both are needed, but 
     exe.addIncludePath(.{ .cwd_relative = b.fmt("{s}/include/gstreamer-1.0/gst", .{gst_dev_path.?}) }); // it won't compile without them
+    exe.addIncludePath(.{ .cwd_relative = b.fmt("{s}/include/gstreamer-1.0/gst/app", .{gst_plugins_base_path.?}) }); // gstreamer-appsink
     exe.addIncludePath(.{ .cwd_relative = b.fmt("{s}/include/glib-2.0", .{glib_dev_path.?}) });
     exe.addIncludePath(.{ .cwd_relative = b.fmt("{s}/lib/glib-2.0/include", .{glib_path.?}) });
 
@@ -53,6 +59,7 @@ pub fn build(b: *std.Build) void {
 
 
     exe.linkSystemLibrary("gstreamer-1.0");
+    exe.linkSystemLibrary("gstreamer-app-1.0");
     exe.linkSystemLibrary("glib-2.0");
     exe.linkSystemLibrary("gobject-2.0");
 
diff --git a/flake.nix b/flake.nix
index 890db72..5e6de5c 100644
--- a/flake.nix
+++ b/flake.nix
@@ -26,10 +26,12 @@
           gst_all_1.gstreamer
           gst_all_1.gstreamer.dev
           gst_all_1.gst-plugins-base
+          gst_all_1.gst-plugins-base.dev
           gst_all_1.gst-plugins-good
         ];
 
         GST_DEV_PATH = pkgs.gst_all_1.gstreamer.dev;
+	GST_PLUGINS_BASE_PATH = pkgs.gst_all_1.gst-plugins-base.dev;
         GLIB_DEV_PATH = pkgs.glib.dev;
         GLIB_PATH = pkgs.glib.out;