203 lines
7 KiB
C++
203 lines
7 KiB
C++
/*
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* Copyright (C) 2014 The Android Open Source Project
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*
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* Licensed under the Apache License, Version 2.0 (the "License");
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* you may not use this file except in compliance with the License.
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* You may obtain a copy of the License at
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*
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* http://www.apache.org/licenses/LICENSE-2.0
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*
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* Unless required by applicable law or agreed to in writing, software
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* distributed under the License is distributed on an "AS IS" BASIS,
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* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
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* See the License for the specific language governing permissions and
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* limitations under the License.
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*/
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#ifndef ANDROID_HARDWARE_CAMERA_PARAMETERS2_H
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#define ANDROID_HARDWARE_CAMERA_PARAMETERS2_H
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#include <utils/Vector.h>
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#include <utils/String8.h>
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#include "CameraParameters.h"
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namespace android {
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/**
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* A copy of CameraParameters plus ABI-breaking changes. Needed
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* because some camera HALs directly link to CameraParameters and cannot
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* tolerate an ABI change.
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*/
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class CameraParameters2
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{
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public:
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CameraParameters2();
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CameraParameters2(const String8 ¶ms) { unflatten(params); }
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~CameraParameters2();
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String8 flatten() const;
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void unflatten(const String8 ¶ms);
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void set(const char *key, const char *value);
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void set(const char *key, int value);
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void setFloat(const char *key, float value);
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// Look up string value by key.
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// -- The string remains valid until the next set/remove of the same key,
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// or until the map gets cleared.
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const char *get(const char *key) const;
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int getInt(const char *key) const;
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float getFloat(const char *key) const;
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// Compare the order that key1 was set vs the order that key2 was set.
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//
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// Sets the order parameter to an integer less than, equal to, or greater
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// than zero if key1's set order was respectively, to be less than, to
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// match, or to be greater than key2's set order.
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//
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// Error codes:
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// * NAME_NOT_FOUND - if either key has not been set previously
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// * BAD_VALUE - if any of the parameters are NULL
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status_t compareSetOrder(const char *key1, const char *key2,
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/*out*/
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int *order) const;
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void remove(const char *key);
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void setPreviewSize(int width, int height);
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void getPreviewSize(int *width, int *height) const;
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void getSupportedPreviewSizes(Vector<Size> &sizes) const;
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// Set the dimensions in pixels to the given width and height
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// for video frames. The given width and height must be one
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// of the supported dimensions returned from
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// getSupportedVideoSizes(). Must not be called if
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// getSupportedVideoSizes() returns an empty Vector of Size.
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void setVideoSize(int width, int height);
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// Retrieve the current dimensions (width and height)
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// in pixels for video frames, which must be one of the
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// supported dimensions returned from getSupportedVideoSizes().
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// Must not be called if getSupportedVideoSizes() returns an
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// empty Vector of Size.
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void getVideoSize(int *width, int *height) const;
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// Retrieve a Vector of supported dimensions (width and height)
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// in pixels for video frames. If sizes returned from the method
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// is empty, the camera does not support calls to setVideoSize()
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// or getVideoSize(). In adddition, it also indicates that
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// the camera only has a single output, and does not have
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// separate output for video frames and preview frame.
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void getSupportedVideoSizes(Vector<Size> &sizes) const;
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// Retrieve the preferred preview size (width and height) in pixels
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// for video recording. The given width and height must be one of
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// supported preview sizes returned from getSupportedPreviewSizes().
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// Must not be called if getSupportedVideoSizes() returns an empty
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// Vector of Size. If getSupportedVideoSizes() returns an empty
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// Vector of Size, the width and height returned from this method
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// is invalid, and is "-1x-1".
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void getPreferredPreviewSizeForVideo(int *width, int *height) const;
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void setPreviewFrameRate(int fps);
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int getPreviewFrameRate() const;
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void getPreviewFpsRange(int *min_fps, int *max_fps) const;
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void setPreviewFpsRange(int min_fps, int max_fps);
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void setPreviewFormat(const char *format);
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const char *getPreviewFormat() const;
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void setPictureSize(int width, int height);
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void getPictureSize(int *width, int *height) const;
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void getSupportedPictureSizes(Vector<Size> &sizes) const;
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void setPictureFormat(const char *format);
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const char *getPictureFormat() const;
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void dump() const;
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status_t dump(int fd, const Vector<String16>& args) const;
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private:
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// Quick and dirty map that maintains insertion order
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template <typename KeyT, typename ValueT>
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struct OrderedKeyedVector {
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ssize_t add(const KeyT& key, const ValueT& value) {
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return mList.add(Pair(key, value));
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}
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size_t size() const {
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return mList.size();
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}
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const KeyT& keyAt(size_t idx) const {
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return mList[idx].mKey;
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}
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const ValueT& valueAt(size_t idx) const {
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return mList[idx].mValue;
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}
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const ValueT& valueFor(const KeyT& key) const {
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ssize_t i = indexOfKey(key);
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LOG_ALWAYS_FATAL_IF(i<0, "%s: key not found", __PRETTY_FUNCTION__);
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return valueAt(i);
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}
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ssize_t indexOfKey(const KeyT& key) const {
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size_t vectorIdx = 0;
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for (; vectorIdx < mList.size(); ++vectorIdx) {
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if (mList[vectorIdx].mKey == key) {
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return (ssize_t) vectorIdx;
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}
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}
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return NAME_NOT_FOUND;
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}
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ssize_t removeItem(const KeyT& key) {
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size_t vectorIdx = (size_t) indexOfKey(key);
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if (vectorIdx < 0) {
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return vectorIdx;
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}
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return mList.removeAt(vectorIdx);
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}
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void clear() {
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mList.clear();
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}
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// Same as removing and re-adding. The key's index changes to max.
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ssize_t replaceValueFor(const KeyT& key, const ValueT& value) {
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removeItem(key);
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return add(key, value);
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}
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private:
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struct Pair {
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Pair() : mKey(), mValue() {}
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Pair(const KeyT& key, const ValueT& value) :
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mKey(key),
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mValue(value) {}
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KeyT mKey;
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ValueT mValue;
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};
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Vector<Pair> mList;
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};
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/**
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* Order matters: Keys that are set() later are stored later in the map.
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*
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* If two keys have meaning that conflict, then the later-set key
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* wins.
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*
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* For example, preview FPS and preview FPS range conflict since only
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* we only want to use the FPS range if that's the last thing that was set.
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* So in that case, only use preview FPS range if it was set later than
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* the preview FPS.
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*/
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OrderedKeyedVector<String8,String8> mMap;
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};
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}; // namespace android
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#endif
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