From e507721000647a7d8afe44c63ef7fd04ef8971b1 Mon Sep 17 00:00:00 2001
From: Ruben Brunk <rubenbrunk@google.com>
Date: Mon, 28 Apr 2014 16:39:12 -0700
Subject: camera2: Adding TIFF writing utilities.

Adds a native image utilities library with support for:
- Writing TIFF 6.0 and TIFF EP compliant file headers.
- Additional tags defined in EXIF 2.3 and DNG 1.4 specs.

Change-Id: I7a4fef74bd5254d92baf08a3cf61af5de1b7ca83
---
 media/img_utils/include/img_utils/DngUtils.h | 132 +++++++++++++++++++++++++++
 1 file changed, 132 insertions(+)
 create mode 100644 media/img_utils/include/img_utils/DngUtils.h

(limited to 'media/img_utils/include/img_utils/DngUtils.h')

diff --git a/media/img_utils/include/img_utils/DngUtils.h b/media/img_utils/include/img_utils/DngUtils.h
new file mode 100644
index 0000000..4389b02
--- /dev/null
+++ b/media/img_utils/include/img_utils/DngUtils.h
@@ -0,0 +1,132 @@
+/*
+ * Copyright 2014 The Android Open Source Project
+ *
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ *      http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+
+#ifndef IMG_UTILS_DNG_UTILS_H
+#define IMG_UTILS_DNG_UTILS_H
+
+#include <img_utils/ByteArrayOutput.h>
+#include <img_utils/EndianUtils.h>
+
+#include <utils/Errors.h>
+#include <utils/Log.h>
+#include <utils/RefBase.h>
+
+#include <cutils/compiler.h>
+#include <stdint.h>
+
+namespace android {
+namespace img_utils {
+
+#define NELEMS(x) ((int) (sizeof(x) / sizeof((x)[0])))
+
+/**
+ * Utility class for building values for the OpcodeList tags specified
+ * in the Adobe DNG 1.4 spec.
+ */
+class ANDROID_API OpcodeListBuilder : public LightRefBase<OpcodeListBuilder> {
+    public:
+        enum CfaLayout {
+            CFA_RGGB = 0,
+            CFA_GRBG,
+            CFA_GBRG,
+            CFA_BGGR,
+        };
+
+        OpcodeListBuilder();
+        virtual ~OpcodeListBuilder();
+
+        /**
+         * Get the total size of this opcode list in bytes.
+         */
+        virtual size_t getSize() const;
+
+        /**
+         * Get the number of opcodes defined in this list.
+         */
+        virtual uint32_t getCount() const;
+
+        /**
+         * Write the opcode list into the given buffer.  This buffer
+         * must be able to hold at least as many elements as returned
+         * by calling the getSize() method.
+         *
+         * Returns OK on success, or a negative error code.
+         */
+        virtual status_t buildOpList(/*out*/ uint8_t* buf) const;
+
+        /**
+         * Add GainMap opcode(s) for the given metadata parameters.  The given
+         * CFA layout must match the layout of the shading map passed into the
+         * lensShadingMap parameter.
+         *
+         * Returns OK on success, or a negative error code.
+         */
+        virtual status_t addGainMapsForMetadata(uint32_t lsmWidth,
+                                                uint32_t lsmHeight,
+                                                uint32_t activeAreaTop,
+                                                uint32_t activeAreaLeft,
+                                                uint32_t activeAreaBottom,
+                                                uint32_t activeAreaRight,
+                                                CfaLayout cfa,
+                                                const float* lensShadingMap);
+
+
+        /**
+         * Add a GainMap opcode with the given fields.  The mapGains array
+         * must have mapPointsV * mapPointsH * mapPlanes elements.
+         *
+         * Returns OK on success, or a negative error code.
+         */
+        virtual status_t addGainMap(uint32_t top,
+                                    uint32_t left,
+                                    uint32_t bottom,
+                                    uint32_t right,
+                                    uint32_t plane,
+                                    uint32_t planes,
+                                    uint32_t rowPitch,
+                                    uint32_t colPitch,
+                                    uint32_t mapPointsV,
+                                    uint32_t mapPointsH,
+                                    double mapSpacingV,
+                                    double mapSpacingH,
+                                    double mapOriginV,
+                                    double mapOriginH,
+                                    uint32_t mapPlanes,
+                                    const float* mapGains);
+
+        // TODO: Add other Opcode methods
+    protected:
+        static const uint32_t FLAG_OPTIONAL = 0x1u;
+        static const uint32_t FLAG_OPTIONAL_FOR_PREVIEW = 0x2u;
+
+        enum {
+            GAIN_MAP_ID = 9,
+            LSM_R_IND = 0,
+            LSM_GE_IND = 1,
+            LSM_GO_IND = 2,
+            LSM_B_IND = 3,
+        };
+
+        uint32_t mCount;
+        ByteArrayOutput mOpList;
+        EndianOutput mEndianOut;
+
+};
+
+} /*namespace img_utils*/
+} /*namespace android*/
+
+#endif /*IMG_UTILS_DNG_UTILS_H*/
-- 
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