t/gui: Add st/prober code

src/xrt/targets/gui/CMakeLists.txt

@@ -16,6 +16,7 @@ include_directories(
 set(SOURCE_FILES
 	gui_common.h
 	gui_main.c
+	gui_prober.c
 	gui_sdl2.c
 	../../../external/glad/gl.h
 	../../../external/glad/gl.c

src/xrt/targets/gui/gui_common.h

@@ -24,6 +24,11 @@
 extern "C" {
 #endif
 
+#define NUM_XDEVS 8
+struct xrt_device;
+struct xrt_prober;
+struct time_state;
+
 /*!
  * Common struct holding state for the GUI interface.
  *
@@ -46,6 +51,10 @@ struct program
 		uint32_t height;
 		bool own_buffer;
 	} blit;
+
+	struct time_state *timekeeping;
+	struct xrt_device *xdevs[NUM_XDEVS];
+	struct xrt_prober *xp;
 };
 
 /*!
@@ -85,6 +94,30 @@ gui_sdl2_display_R8G8B8(struct program *p,
 void
 gui_sdl2_quit(struct program *p);
 
+/*!
+ * Initialize the prober and open all devices found.
+ *
+ * @ingroup gui
+ */
+int
+gui_prober_init(struct program *p);
+
+/*!
+ * Update all devices.
+ *
+ * @ingroup gui
+ */
+void
+gui_prober_update(struct program *p);
+
+/*!
+ * Destroy all opened devices and destroy the prober.
+ *
+ * @ingroup gui
+ */
+void
+gui_prober_teardown(struct program *p);
+
 
 #ifdef __cplusplus
 }

src/xrt/targets/gui/gui_prober.c

@@ -0,0 +1,123 @@
+// Copyright 2019, Collabora, Ltd.
+// SPDX-License-Identifier: BSL-1.0
+/*!
+ * @file
+ * @brief  Enable the use of the prober in the gui application.
+ * @author Jakob Bornecrantz <jakob@collabora.com>
+ */
+
+#include "util/u_time.h"
+#include "target_lists.h"
+#include "gui_common.h"
+
+
+/*
+ *
+ * Helper functions.
+ *
+ */
+
+static int
+do_exit(struct program *p, int ret)
+{
+	gui_prober_teardown(p);
+	return ret;
+}
+
+
+/*
+ *
+ * 'Exported' functions.
+ *
+ */
+
+int
+gui_prober_init(struct program *p)
+{
+	int ret = 0;
+
+	p->timekeeping = time_state_create();
+
+	// Initialize the prober.
+	printf(" :: Creating prober!\n");
+
+	ret = xrt_prober_create(&p->xp);
+	if (ret != 0) {
+		return do_exit(p, ret);
+	}
+
+	// Need to prime the prober with devices before dumping and listing.
+	printf(" :: Probing!\n");
+
+	ret = xrt_prober_probe(p->xp);
+	if (ret != 0) {
+		return do_exit(p, ret);
+	}
+
+	// Multiple devices can be found.
+	printf(" :: Selecting devices!\n");
+
+	ret = xrt_prober_select(p->xp, p->xdevs, NUM_XDEVS);
+	if (ret != 0) {
+		do_exit(p, ret);
+	}
+	if (p->xdevs[0] == NULL) {
+		printf("\tNo HMD found! :(\n");
+		return do_exit(p, -1);
+	}
+
+	for (size_t i = 0; i < NUM_XDEVS; i++) {
+		if (p->xdevs[i] == NULL) {
+			continue;
+		}
+
+		printf("\tFound '%s'\n", p->xdevs[i]->str);
+	}
+
+	return 0;
+}
+
+void
+gui_prober_update(struct program *p)
+{
+	// We haven't been initialized
+	if (p->timekeeping == NULL) {
+		return;
+	}
+
+	time_state_get_now_and_update(p->timekeeping);
+
+	for (size_t i = 0; i < NUM_XDEVS; i++) {
+		if (p->xdevs[i] == NULL) {
+			continue;
+		}
+
+		p->xdevs[i]->update_inputs(p->xdevs[i], p->timekeeping);
+	}
+}
+
+void
+gui_prober_teardown(struct program *p)
+{
+	for (size_t i = 0; i < NUM_XDEVS; i++) {
+		if (p->xdevs[i] == NULL) {
+			continue;
+		}
+
+		p->xdevs[i]->destroy(p->xdevs[i]);
+		p->xdevs[i] = NULL;
+	}
+
+	if (p->timekeeping != NULL) {
+		time_state_destroy(p->timekeeping);
+		p->timekeeping = NULL;
+	}
+
+	xrt_prober_destroy(&p->xp);
+}
+
+int
+xrt_prober_create(struct xrt_prober **out_xp)
+{
+	return xrt_prober_create_with_lists(out_xp, &target_lists);
+}