1/*
2 * Copyright (C) 2012 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 TIMED_TEXT_SRT_SOURCE_H_
18#define TIMED_TEXT_SRT_SOURCE_H_
19
20#include <media/stagefright/MediaErrors.h>
21#include <media/stagefright/MediaSource.h>
22#include <utils/Compat.h>  // off64_t
23
24#include "TimedTextSource.h"
25
26namespace android {
27
28class AString;
29class DataSource;
30class MediaBuffer;
31class Parcel;
32
33class TimedTextSRTSource : public TimedTextSource {
34public:
35    TimedTextSRTSource(const sp<DataSource>& dataSource);
36    virtual status_t start();
37    virtual status_t stop();
38    virtual status_t read(
39            int64_t *startTimeUs,
40            int64_t *endTimeUs,
41            Parcel *parcel,
42            const MediaSource::ReadOptions *options = NULL);
43    virtual sp<MetaData> getFormat();
44
45protected:
46    virtual ~TimedTextSRTSource();
47
48private:
49    sp<DataSource> mSource;
50    sp<MetaData> mMetaData;
51
52    struct TextInfo {
53        int64_t endTimeUs;
54        // The offset of the text in the original file.
55        off64_t offset;
56        int textLen;
57    };
58
59    size_t mIndex;
60    KeyedVector<int64_t, TextInfo> mTextVector;
61
62    void reset();
63    status_t scanFile();
64    status_t getNextSubtitleInfo(
65            off64_t *offset, int64_t *startTimeUs, TextInfo *info);
66    status_t readNextLine(off64_t *offset, AString *data);
67    status_t getText(
68            const MediaSource::ReadOptions *options,
69            AString *text, int64_t *startTimeUs, int64_t *endTimeUs);
70    status_t extractAndAppendLocalDescriptions(
71            int64_t timeUs, const AString &text, Parcel *parcel);
72
73    DISALLOW_EVIL_CONSTRUCTORS(TimedTextSRTSource);
74};
75
76}  // namespace android
77
78#endif  // TIMED_TEXT_SRT_SOURCE_H_
79