WVMExtractor.h revision e301545a292987b6f7f3b316003eb8b76e3a5e2e 
1/*
2 * Copyright (C) 2010 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 WVM_EXTRACTOR_H_
18
19#define WVM_EXTRACTOR_H_
20
21#include <media/stagefright/MediaExtractor.h>
22#include <utils/Errors.h>
23
24namespace android {
25
26class DataSource;
27
28class WVMLoadableExtractor : public MediaExtractor {
29public:
30    WVMLoadableExtractor() {}
31    virtual ~WVMLoadableExtractor() {}
32
33    virtual int64_t getCachedDurationUs(status_t *finalStatus) = 0;
34    virtual void setAdaptiveStreamingMode(bool adaptive) = 0;
35};
36
37class WVMExtractor : public MediaExtractor {
38public:
39    WVMExtractor(const sp<DataSource> &source);
40
41    virtual size_t countTracks();
42    virtual sp<MediaSource> getTrack(size_t index);
43    virtual sp<MetaData> getTrackMetaData(size_t index, uint32_t flags);
44    virtual sp<MetaData> getMetaData();
45
46    // Return the amount of data cached from the current
47    // playback positiion (in us).
48    // While more data is still being fetched *finalStatus == OK,
49    // Once fetching is completed (no more data available), *finalStatus != OK
50    // If fetching completed normally (i.e. reached EOS instead of IO error)
51    // *finalStatus == ERROR_END_OF_STREAM
52    int64_t getCachedDurationUs(status_t *finalStatus);
53
54    // Set to use adaptive streaming mode by the WV component.
55    // If adaptive == true, adaptive streaming mode will be used.
56    // Default mode is non-adaptive streaming mode.
57    // Should set to use adaptive streaming mode only if widevine:// protocol
58    // is used.
59    void setAdaptiveStreamingMode(bool adaptive);
60
61protected:
62    virtual ~WVMExtractor();
63
64private:
65    sp<DataSource> mDataSource;
66    sp<WVMLoadableExtractor> mImpl;
67
68    WVMExtractor(const WVMExtractor &);
69    WVMExtractor &operator=(const WVMExtractor &);
70};
71
72}  // namespace android
73
74#endif  // DRM_EXTRACTOR_H_
75
76