1/*
2 * Copyright 2015, 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_AUDIO_DTS_FRAME_SCANNER_H
18#define ANDROID_AUDIO_DTS_FRAME_SCANNER_H
19
20#include <stdint.h>
21#include <audio_utils/spdif/FrameScanner.h>
22
23namespace android {
24
25#define DTS_NUM_SAMPLE_RATE_TABLE_ENTRIES      16
26#define DTS_PCM_FRAMES_PER_BLOCK               32
27#define DTS_MAX_BLOCKS_PER_SYNC_FRAME_BLOCK   128
28
29class DTSFrameScanner : public FrameScanner
30{
31public:
32    DTSFrameScanner();
33    virtual ~DTSFrameScanner();
34
35    virtual int getMaxChannels()   const { return 5 + 1; }
36
37    virtual int getMaxSampleFramesPerSyncFrame() const {
38        return  DTS_MAX_BLOCKS_PER_SYNC_FRAME_BLOCK * DTS_PCM_FRAMES_PER_BLOCK;
39    }
40
41    virtual int getSampleFramesPerSyncFrame() const {
42        return mSampleFramesPerSyncFrame;
43    }
44
45    virtual bool isFirstInBurst() { return true; }
46    virtual bool isLastInBurst() { return true; }
47    virtual void resetBurst()  { }
48
49protected:
50
51    int mSampleFramesPerSyncFrame;
52
53    virtual bool parseHeader();
54
55    static const uint8_t kSyncBytes[];
56    static const int32_t kDTSSampleRateTable[];
57
58};
59
60}  // namespace android
61#endif  // ANDROID_AUDIO_DTS_FRAME_SCANNER_H
62