IStreamSource.h revision 9dffd24e00a1b2abd5e2dcc2366c0327ec3701b8 
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 ANDROID_ISTREAMSOURCE_H_
18
19#define ANDROID_ISTREAMSOURCE_H_
20
21#include <binder/IInterface.h>
22
23namespace android {
24
25struct AMessage;
26struct IMemory;
27struct IStreamListener;
28
29struct IStreamSource : public IInterface {
30    DECLARE_META_INTERFACE(StreamSource);
31
32    virtual void setListener(const sp<IStreamListener> &listener) = 0;
33    virtual void setBuffers(const Vector<sp<IMemory> > &buffers) = 0;
34
35    virtual void onBufferAvailable(size_t index) = 0;
36
37    enum {
38        // Video PES packets contain exactly one (aligned) access unit.
39        kFlagAlignedVideoData = 1,
40
41        // Timestamps are in ALooper::GetNowUs() units.
42        kFlagIsRealTimeData   = 2,
43    };
44    virtual uint32_t flags() const { return 0; }
45};
46
47struct IStreamListener : public IInterface {
48    DECLARE_META_INTERFACE(StreamListener);
49
50    enum Command {
51        EOS,
52        DISCONTINUITY,
53    };
54
55    virtual void queueBuffer(size_t index, size_t size) = 0;
56
57    // When signalling a discontinuity you can optionally
58    // specify an int64_t PTS timestamp in "msg".
59    // If present, rendering of data following the discontinuity
60    // will be suppressed until media time reaches this timestamp.
61    static const char *const kKeyResumeAtPTS;
62
63    // When signalling a discontinuity you can optionally
64    // specify the type(s) of discontinuity, i.e. if the
65    // audio format has changed, the video format has changed,
66    // time has jumped or any combination thereof.
67    // To do so, include a non-zero int32_t value
68    // under the key "kKeyDiscontinuityMask" when issuing the DISCONTINUITY
69    // command.
70    // If there is a change in audio/video format, The new logical stream
71    // must start with proper codec initialization
72    // information for playback to continue, i.e. SPS and PPS in the case
73    // of AVC video etc.
74    // If this key is not present, only a time discontinuity is assumed.
75    // The value should be a bitmask of values from
76    // ATSParser::DiscontinuityType.
77    static const char *const kKeyDiscontinuityMask;
78
79    // Optionally signalled as part of a discontinuity that includes
80    // DISCONTINUITY_TIME. It indicates the media time (in us) to be associated
81    // with the next PTS occuring in the stream. The value is of type int64_t.
82    static const char *const kKeyMediaTimeUs;
83
84    virtual void issueCommand(
85            Command cmd, bool synchronous, const sp<AMessage> &msg = NULL) = 0;
86};
87
88////////////////////////////////////////////////////////////////////////////////
89
90struct BnStreamSource : public BnInterface<IStreamSource> {
91    virtual status_t onTransact(
92            uint32_t code, const Parcel &data, Parcel *reply,
93            uint32_t flags = 0);
94};
95
96struct BnStreamListener : public BnInterface<IStreamListener> {
97    virtual status_t onTransact(
98            uint32_t code, const Parcel &data, Parcel *reply,
99            uint32_t flags = 0);
100};
101
102}  // namespace android
103
104#endif  // ANDROID_ISTREAMSOURCE_H_
105