From 9078a1b3b9f9c0c48046ade0e8e18b0d79a659db Mon Sep 17 00:00:00 2001
From: Igor Murashkin <iam@google.com>
Date: Tue, 18 Mar 2014 18:15:23 -0700
Subject: camera: Fix setParameters for Preview FPS single/range values

Bug: 12609188
Change-Id: I82ea6f5de2183dd046d4bf5683600c97f37ab4db
---
 include/camera/CameraParameters.h | 104 +++++++++++++++++++++++++++++++++++++-
 1 file changed, 103 insertions(+), 1 deletion(-)

(limited to 'include/camera/CameraParameters.h')

diff --git a/include/camera/CameraParameters.h b/include/camera/CameraParameters.h
index d521543..833ba76 100644
--- a/include/camera/CameraParameters.h
+++ b/include/camera/CameraParameters.h
@@ -18,6 +18,7 @@
 #define ANDROID_HARDWARE_CAMERA_PARAMETERS_H
 
 #include <utils/KeyedVector.h>
+#include <utils/Vector.h>
 #include <utils/String8.h>
 
 namespace android {
@@ -50,10 +51,26 @@ public:
     void set(const char *key, const char *value);
     void set(const char *key, int value);
     void setFloat(const char *key, float value);
+    // Look up string value by key.
+    // -- The string remains valid until the next set/remove of the same key,
+    //    or until the map gets cleared.
     const char *get(const char *key) const;
     int getInt(const char *key) const;
     float getFloat(const char *key) const;
 
+    // Compare the order that key1 was set vs the order that key2 was set.
+    //
+    // Sets the order parameter to an integer less than, equal to, or greater
+    // than zero if key1's set order was respectively, to be less than, to
+    // match, or to be greater than key2's set order.
+    //
+    // Error codes:
+    //  * NAME_NOT_FOUND - if either key has not been set previously
+    //  * BAD_VALUE - if any of the parameters are NULL
+    status_t compareSetOrder(const char *key1, const char *key2,
+            /*out*/
+            int *order) const;
+
     void remove(const char *key);
 
     void setPreviewSize(int width, int height);
@@ -91,6 +108,7 @@ public:
     void setPreviewFrameRate(int fps);
     int getPreviewFrameRate() const;
     void getPreviewFpsRange(int *min_fps, int *max_fps) const;
+    void setPreviewFpsRange(int min_fps, int max_fps);
     void setPreviewFormat(const char *format);
     const char *getPreviewFormat() const;
     void setPictureSize(int width, int height);
@@ -675,7 +693,91 @@ public:
     static const char LIGHTFX_HDR[];
 
 private:
-    DefaultKeyedVector<String8,String8>    mMap;
+
+    // Quick and dirty map that maintains insertion order
+    template <typename KeyT, typename ValueT>
+    struct OrderedKeyedVector {
+
+        ssize_t add(const KeyT& key, const ValueT& value) {
+            return mList.add(Pair(key, value));
+        }
+
+        size_t size() const {
+            return mList.size();
+        }
+
+        const KeyT& keyAt(size_t idx) const {
+            return mList[idx].mKey;
+        }
+
+        const ValueT& valueAt(size_t idx) const {
+            return mList[idx].mValue;
+        }
+
+        const ValueT& valueFor(const KeyT& key) const {
+            ssize_t i = indexOfKey(key);
+            LOG_ALWAYS_FATAL_IF(i<0, "%s: key not found", __PRETTY_FUNCTION__);
+
+            return valueAt(i);
+        }
+
+        ssize_t indexOfKey(const KeyT& key) const {
+                size_t vectorIdx = 0;
+                for (; vectorIdx < mList.size(); ++vectorIdx) {
+                    if (mList[vectorIdx].mKey == key) {
+                        return (ssize_t) vectorIdx;
+                    }
+                }
+
+                return NAME_NOT_FOUND;
+        }
+
+        ssize_t removeItem(const KeyT& key) {
+            size_t vectorIdx = (size_t) indexOfKey(key);
+
+            if (vectorIdx < 0) {
+                return vectorIdx;
+            }
+
+            return mList.removeAt(vectorIdx);
+        }
+
+        void clear() {
+            mList.clear();
+        }
+
+        // Same as removing and re-adding. The key's index changes to max.
+        ssize_t replaceValueFor(const KeyT& key, const ValueT& value) {
+            removeItem(key);
+            return add(key, value);
+        }
+
+    private:
+
+        struct Pair {
+            Pair() : mKey(), mValue() {}
+            Pair(const KeyT& key, const ValueT& value) :
+                    mKey(key),
+                    mValue(value) {}
+            KeyT   mKey;
+            ValueT mValue;
+        };
+
+        Vector<Pair> mList;
+    };
+
+    /**
+     * Order matters: Keys that are set() later are stored later in the map.
+     *
+     * If two keys have meaning that conflict, then the later-set key
+     * wins.
+     *
+     * For example, preview FPS and preview FPS range conflict since only
+     * we only want to use the FPS range if that's the last thing that was set.
+     * So in that case, only use preview FPS range if it was set later than
+     * the preview FPS.
+     */
+    OrderedKeyedVector<String8,String8>    mMap;
 };
 
 }; // namespace android
-- 
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