tests: add missing file

spa/plugins/audiomixer/test-helper.h

@@ -0,0 +1,97 @@
+#include <dlfcn.h>
+
+#include <spa/support/plugin.h>
+#include <spa/utils/type.h>
+#include <spa/utils/result.h>
+#include <spa/support/cpu.h>
+#include <spa/utils/names.h>
+
+static inline const struct spa_handle_factory *get_factory(spa_handle_factory_enum_func_t enum_func,
+		const char *name, uint32_t version)
+{
+	uint32_t i;
+	int res;
+	const struct spa_handle_factory *factory;
+
+	for (i = 0;;) {
+		if ((res = enum_func(&factory, &i)) <= 0) {
+			if (res < 0)
+				errno = -res;
+			break;
+		}
+		if (factory->version >= version &&
+		    !strcmp(factory->name, name))
+			return factory;
+	}
+	return NULL;
+}
+
+static inline struct spa_handle *load_handle(const struct spa_support *support,
+		uint32_t n_support, const char *lib, const char *name)
+{
+	int res, len;
+	void *hnd;
+	spa_handle_factory_enum_func_t enum_func;
+	const struct spa_handle_factory *factory;
+	struct spa_handle *handle;
+	const char *str;
+	char *path;
+
+	if ((str = getenv("SPA_PLUGIN_DIR")) == NULL)
+		str = PLUGINDIR;
+
+	len = strlen(str) + strlen(lib) + 2;
+	path = alloca(len);
+	snprintf(path, len, "%s/%s", str, lib);
+
+	if ((hnd = dlopen(path, RTLD_NOW)) == NULL) {
+		fprintf(stderr, "can't load %s: %s\n", lib, dlerror());
+		res = -ENOENT;
+		goto error;
+	}
+	if ((enum_func = dlsym(hnd, SPA_HANDLE_FACTORY_ENUM_FUNC_NAME)) == NULL) {
+		fprintf(stderr, "can't find enum function\n");
+		res = -ENXIO;
+		goto error_close;
+	}
+
+	if ((factory = get_factory(enum_func, name, SPA_VERSION_HANDLE_FACTORY)) == NULL) {
+		fprintf(stderr, "can't find factory\n");
+		res = -ENOENT;
+		goto error_close;
+	}
+	handle = calloc(1, spa_handle_factory_get_size(factory, NULL));
+	if ((res = spa_handle_factory_init(factory, handle,
+					NULL, support, n_support)) < 0) {
+		fprintf(stderr, "can't make factory instance: %d\n", res);
+		goto error_close;
+	}
+	return handle;
+
+error_close:
+	dlclose(hnd);
+error:
+	errno = -res;
+	return NULL;
+}
+
+static inline uint32_t get_cpu_flags(void)
+{
+	struct spa_handle *handle;
+	uint32_t flags;
+	void *iface;
+	int res;
+
+	handle = load_handle(NULL, 0, "support/libspa-support.so", SPA_NAME_SUPPORT_CPU);
+	if (handle == NULL)
+		return 0;
+	if ((res = spa_handle_get_interface(handle, SPA_TYPE_INTERFACE_CPU, &iface)) < 0) {
+		fprintf(stderr, "can't get CPU interface %s\n", spa_strerror(res));
+		return 0;
+	}
+	flags = spa_cpu_get_flags((struct spa_cpu*)iface);
+
+	free(handle);
+
+	return flags;
+}