android_media_Utils.h revision 0ab416269a866c8afa8f65d9351afa2407abee4c 
1/*
2 * Copyright 2011, The Android Open Source Project
3 *
4 * Licensed under the Apache License, Version 2.0 (the "License");
5 * you may not use this file except in compliance with the License.
6 * You may obtain a copy of the License at
7 *
8 *     http://www.apache.org/licenses/LICENSE-2.0
9 *
10 * Unless required by applicable law or agreed to in writing, software
11 * distributed under the License is distributed on an "AS IS" BASIS,
12 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
13 * See the License for the specific language governing permissions and
14 * limitations under the License.
15 */
16
17#ifndef _ANDROID_MEDIA_UTILS_H_
18#define _ANDROID_MEDIA_UTILS_H_
19
20#include "src/piex_types.h"
21#include "src/piex.h"
22
23#include <android_runtime/AndroidRuntime.h>
24#include <jni.h>
25#include <JNIHelp.h>
26#include <utils/KeyedVector.h>
27#include <utils/String8.h>
28#include <gui/CpuConsumer.h>
29#include <camera3.h>
30
31namespace android {
32
33class FileStream : public piex::StreamInterface {
34private:
35    FILE *mFile;
36    size_t mPosition;
37    size_t mSize;
38
39public:
40    FileStream(const int fd);
41    FileStream(const String8 filename);
42    ~FileStream();
43
44    // Reads 'length' amount of bytes from 'offset' to 'data'. The 'data' buffer
45    // provided by the caller, guaranteed to be at least "length" bytes long.
46    // On 'kOk' the 'data' pointer contains 'length' valid bytes beginning at
47    // 'offset' bytes from the start of the stream.
48    // Returns 'kFail' if 'offset' + 'length' exceeds the stream and does not
49    // change the contents of 'data'.
50    piex::Error GetData(
51            const size_t offset, const size_t length, std::uint8_t* data) override;
52    bool exists() const;
53    size_t size() const;
54};
55
56// Reads EXIF metadata from a given raw image via piex.
57// And returns true if the operation is successful; otherwise, false.
58bool GetExifFromRawImage(
59        FileStream* stream, const String8& filename, piex::PreviewImageData& image_data);
60
61// Returns true if the conversion is successful; otherwise, false.
62bool ConvertKeyValueArraysToKeyedVector(
63        JNIEnv *env, jobjectArray keys, jobjectArray values,
64        KeyedVector<String8, String8>* vector);
65
66struct AMessage;
67status_t ConvertMessageToMap(
68        JNIEnv *env, const sp<AMessage> &msg, jobject *map);
69
70status_t ConvertKeyValueArraysToMessage(
71        JNIEnv *env, jobjectArray keys, jobjectArray values,
72        sp<AMessage> *msg);
73
74// -----------Utility functions used by ImageReader/Writer JNI-----------------
75
76typedef CpuConsumer::LockedBuffer LockedImage;
77
78bool usingRGBAToJpegOverride(int32_t imageFormat, int32_t containerFormat);
79
80int32_t applyFormatOverrides(int32_t imageFormat, int32_t containerFormat);
81
82uint32_t Image_getJpegSize(LockedImage* buffer, bool usingRGBAOverride);
83
84bool isFormatOpaque(int format);
85
86bool isPossiblyYUV(PixelFormat format);
87
88status_t getLockedImageInfo(LockedImage* buffer, int idx, int32_t containerFormat,
89        uint8_t **base, uint32_t *size, int *pixelStride, int *rowStride);
90
91status_t lockImageFromBuffer(sp<GraphicBuffer> buffer, uint32_t inUsage,
92        const Rect& rect, int fenceFd, LockedImage* outputImage);
93
94status_t lockImageFromBuffer(BufferItem* bufferItem, uint32_t inUsage,
95        int fenceFd, LockedImage* outputImage);
96
97int getBufferWidth(BufferItem *buffer);
98
99int getBufferHeight(BufferItem *buffer);
100
101};  // namespace android
102
103#endif //  _ANDROID_MEDIA_UTILS_H_
104