libcamera: ipa: Raspberry Pi IPA

Initial implementation of the Raspberry Pi (BCM2835) libcamera IPA and
associated libraries.

All code is licensed under the BSD-2-Clause terms.
Copyright (c) 2019-2020 Raspberry Pi Trading Ltd.

Signed-off-by: Naushir Patuck <naush@raspberrypi.com>
Acked-by: Laurent Pinchart <laurent.pinchart@ideasonboard.com>
Signed-off-by: Laurent Pinchart <laurent.pinchart@ideasonboard.com>

1 files changed, 39 insertions, 0 deletions

diff --git a/src/ipa/raspberrypi/controller/agc_status.h b/src/ipa/raspberrypi/controller/agc_status.h
new file mode 100644
index 00000000..10381c90
--- /dev/null
+++ b/src/ipa/raspberrypi/controller/agc_status.h
@@ -0,0 +1,39 @@
+/* SPDX-License-Identifier: BSD-2-Clause */
+/*
+ * Copyright (C) 2019, Raspberry Pi (Trading) Limited
+ *
+ * agc_status.h - AGC/AEC control algorithm status
+ */
+#pragma once
+
+// The AGC algorithm should post the following structure into the image's
+// "agc.status" metadata.
+
+#ifdef __cplusplus
+extern "C" {
+#endif
+
+// Note: total_exposure_value will be reported as zero until the algorithm has
+// seen statistics and calculated meaningful values. The contents should be
+// ignored until then.
+
+struct AgcStatus {
+	double total_exposure_value; // value for all exposure and gain for this image
+	double target_exposure_value; // (unfiltered) target total exposure AGC is aiming for
+	double shutter_time;
+	double analogue_gain;
+	char exposure_mode[32];
+	char constraint_mode[32];
+	char metering_mode[32];
+	double ev;
+	double flicker_period;
+	int floating_region_enable;
+	double fixed_shutter;
+	double fixed_analogue_gain;
+	double digital_gain;
+	int locked;
+};
+
+#ifdef __cplusplus
+}
+#endif