1  /*
2   * Copyright (c) 2023 Shenzhen Kaihong DID Co., Ltd.
3   * Licensed under the Apache License, Version 2.0 (the "License");
4   * you may not use this file except in compliance with the License.
5   * You may obtain a copy of the License at
6   *
7   * 		http://www.apache.org/licenses/LICENSE-2.0
8   *
9   * Unless required by applicable law or agreed to in writing, software
10   * distributed under the License is distributed on an "AS IS" BASIS,
11   * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
12   * See the License for the specific language governing permissions and
13   * limitations under the License.
14   */
15  
16  #ifndef OHOS_HDI_CODEC_IMAGE_V2_0_CODECJPEGHELPER_H
17  #define OHOS_HDI_CODEC_IMAGE_V2_0_CODECJPEGHELPER_H
18  #include <cinttypes>
19  #include "v2_0/icodec_image.h"
20  #include <memory>
21  namespace OHOS {
22  namespace HDI {
23  namespace Codec {
24  namespace Image {
25  namespace V2_0 {
26  class CodecJpegHelper {
27  public:
28      enum JpegMarker : int16_t {
29          SOF0 = 0xffc0,
30          DHT = 0xffc4,
31          SOI = 0xffd8,
32          EOI = 0xffd9,
33          SOS = 0xffda,
34          DQT = 0xffdb,
35          DRI = 0xffdd,
36          UNKNOWN = 0xffff
37      };
38      explicit CodecJpegHelper() = default;
39      ~CodecJpegHelper() = default;
40      int32_t JpegAssemble(const struct CodecJpegDecInfo &decInfo, int8_t *buffer, int32_t fd);
41      bool DessambleJpeg(int8_t *buffer, size_t bufferLen, struct CodecJpegDecInfo &decInfo,
42                         std::unique_ptr<int8_t[]> &compressBuffer, uint32_t &comBufLen, uint32_t &dataStart);
43  
44  private:
45      int32_t FindMarker(int8_t *start);
46      int32_t JpegDqtAssemble(const struct CodecJpegDecInfo &decInfo, int8_t *buffer, int32_t curPos);
47      int32_t JpegDriAssemble(const struct CodecJpegDecInfo &decInfo, int8_t *buffer, int32_t curPos);
48      int32_t JpegDhtAssemble(const struct CodecJpegDecInfo &decInfo, int8_t *buffer, int32_t curPos);
49      int32_t JpegDhtAssemble(const std::vector<CodecJpegHuffTable> &table, int8_t *buffer, int32_t curPos,
50                              bool dc = true);
51      int32_t JpegSofAssemble(const struct CodecJpegDecInfo &decInfo, int8_t *buffer, int32_t curPos);
52      int32_t JpegSosAssemble(const struct CodecJpegDecInfo &decInfo, int8_t *buffer, int32_t curPos);
53      int32_t JpegDataAssemble(int8_t *buffer, int32_t curPos, int32_t fd);
54      int32_t DessambleSof(int8_t *buffer, struct CodecJpegDecInfo &decInfo);
55      int32_t DessambleSos(int8_t *buffer, struct CodecJpegDecInfo &decInfo);
56      int32_t DessambleCompressData(int8_t *buffer, std::unique_ptr<int8_t[]> &compressBuffer, uint32_t &comBufLen);
57      int32_t DessambleDqt(int8_t *buffer, struct CodecJpegDecInfo &decInfo);
58      int32_t DessambleDht(int8_t *buffer, struct CodecJpegDecInfo &decInfo);
59      int32_t PutInt16(int8_t *buffer, int32_t curPos, int16_t value);
60      int32_t PutInt8(int8_t *buffer, int32_t curPos, int8_t value);
61      int32_t GetInt8(int8_t *buffer);
62      int32_t GetInt16(int8_t *buffer);
63  private:
64      static constexpr int32_t MAX_BUFFER_LEN = 128;
65  };
66  }
67  }
68  }
69  }
70  }
71  #endif // OHOS_HDI_CODEC_IMAGE_V2_0_CODECJPEGHELPER_H
72