1/*
2 * Copyright (C) 2017 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 _HEIF_DECODER_IMPL_
18#define _HEIF_DECODER_IMPL_
19
20#include "include/HeifDecoderAPI.h"
21#include <system/graphics.h>
22#include <utils/Condition.h>
23#include <utils/Mutex.h>
24#include <utils/RefBase.h>
25
26namespace android {
27
28class IDataSource;
29class IMemory;
30class MediaMetadataRetriever;
31
32/*
33 * An implementation of HeifDecoder based on Android's MediaMetadataRetriever.
34 */
35class HeifDecoderImpl : public HeifDecoder {
36public:
37
38    HeifDecoderImpl();
39    ~HeifDecoderImpl() override;
40
41    bool init(HeifStream* stream, HeifFrameInfo* frameInfo) override;
42
43    bool getEncodedColor(HeifEncodedColor* outColor) const override;
44
45    bool setOutputColor(HeifColorFormat heifColor) override;
46
47    bool decode(HeifFrameInfo* frameInfo) override;
48
49    bool getScanline(uint8_t* dst) override;
50
51    size_t skipScanlines(size_t count) override;
52
53private:
54    struct DecodeThread;
55
56    sp<IDataSource> mDataSource;
57    sp<MediaMetadataRetriever> mRetriever;
58    sp<IMemory> mFrameMemory;
59    android_pixel_format_t mOutputColor;
60    size_t mCurScanline;
61    uint32_t mWidth;
62    uint32_t mHeight;
63    bool mFrameDecoded;
64    bool mHasImage;
65    bool mHasVideo;
66
67    // Slice decoding only
68    Mutex mLock;
69    Condition mScanlineReady;
70    sp<DecodeThread> mThread;
71    size_t mAvailableLines;
72    size_t mNumSlices;
73    uint32_t mSliceHeight;
74    bool mAsyncDecodeDone;
75
76    bool decodeAsync();
77    bool getScanlineInner(uint8_t* dst);
78};
79
80} // namespace android
81
82#endif // _HEIF_DECODER_IMPL_
83