Implement kms vaapi capture

1 files changed, 34 insertions, 0 deletions

diff --git a/src/library_loader.c b/src/library_loader.c
new file mode 100644
index 0000000..0aeee9b
--- /dev/null
+++ b/src/library_loader.c
@@ -0,0 +1,34 @@
+#include "../include/library_loader.h"
+
+#include <dlfcn.h>
+#include <stdbool.h>
+#include <stdio.h>
+
+void* dlsym_print_fail(void *handle, const char *name, bool required) {
+    dlerror();
+    void *sym = dlsym(handle, name);
+    char *err_str = dlerror();
+
+    if(!sym)
+        fprintf(stderr, "%s: dlsym(handle, \"%s\") failed, error: %s\n", required ? "error" : "warning", name, err_str ? err_str : "(null)");
+
+    return sym;
+}
+
+/* |dlsyms| should be null terminated */
+bool dlsym_load_list(void *handle, const dlsym_assign *dlsyms) {
+    bool success = true;
+    for(int i = 0; dlsyms[i].func; ++i) {
+        *dlsyms[i].func = dlsym_print_fail(handle, dlsyms[i].name, true);
+        if(!*dlsyms[i].func)
+            success = false;
+    }
+    return success;
+}
+
+/* |dlsyms| should be null terminated */
+void dlsym_load_list_optional(void *handle, const dlsym_assign *dlsyms) {
+    for(int i = 0; dlsyms[i].func; ++i) {
+        *dlsyms[i].func = dlsym_print_fail(handle, dlsyms[i].name, false);
+    }
+}