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 NUPLAYER_SOURCE_H_
18 
19 #define NUPLAYER_SOURCE_H_
20 
21 #include "NuPlayer.h"
22 
23 #include <media/stagefright/foundation/AMessage.h>
24 #include <media/stagefright/MetaData.h>
25 #include <media/mediaplayer.h>
26 #include <utils/Vector.h>
27 
28 namespace android {
29 
30 struct ABuffer;
31 class MediaBuffer;
32 
33 struct NuPlayer::Source : public AHandler {
34     enum Flags {
35         FLAG_CAN_PAUSE          = 1,
36         FLAG_CAN_SEEK_BACKWARD  = 2,  // the "10 sec back button"
37         FLAG_CAN_SEEK_FORWARD   = 4,  // the "10 sec forward button"
38         FLAG_CAN_SEEK           = 8,  // the "seek bar"
39         FLAG_DYNAMIC_DURATION   = 16,
40         FLAG_SECURE             = 32,
41         FLAG_PROTECTED          = 64,
42     };
43 
44     enum {
45         kWhatPrepared,
46         kWhatFlagsChanged,
47         kWhatVideoSizeChanged,
48         kWhatBufferingUpdate,
49         kWhatBufferingStart,
50         kWhatBufferingEnd,
51         kWhatPauseOnBufferingStart,
52         kWhatResumeOnBufferingEnd,
53         kWhatCacheStats,
54         kWhatSubtitleData,
55         kWhatTimedTextData,
56         kWhatTimedMetaData,
57         kWhatQueueDecoderShutdown,
58         kWhatDrmNoLicense,
59         kWhatInstantiateSecureDecoders,
60     };
61 
62     // The provides message is used to notify the player about various
63     // events.
SourceSource64     Source(const sp<AMessage> &notify)
65         : mNotify(notify) {
66     }
67 
68     virtual void prepareAsync() = 0;
69 
70     virtual void start() = 0;
stopSource71     virtual void stop() {}
pauseSource72     virtual void pause() {}
resumeSource73     virtual void resume() {}
74 
75     // Explicitly disconnect the underling data source
disconnectSource76     virtual void disconnect() {}
77 
78     // Returns OK iff more data was available,
79     // an error or ERROR_END_OF_STREAM if not.
80     virtual status_t feedMoreTSData() = 0;
81 
82     virtual sp<AMessage> getFormat(bool audio);
getFormatMetaSource83     virtual sp<MetaData> getFormatMeta(bool /* audio */) { return NULL; }
getFileFormatMetaSource84     virtual sp<MetaData> getFileFormatMeta() const { return NULL; }
85 
86     virtual status_t dequeueAccessUnit(
87             bool audio, sp<ABuffer> *accessUnit) = 0;
88 
getDurationSource89     virtual status_t getDuration(int64_t * /* durationUs */) {
90         return INVALID_OPERATION;
91     }
92 
getTrackCountSource93     virtual size_t getTrackCount() const {
94         return 0;
95     }
96 
getTrackInfoSource97     virtual sp<AMessage> getTrackInfo(size_t /* trackIndex */) const {
98         return NULL;
99     }
100 
getSelectedTrackSource101     virtual ssize_t getSelectedTrack(media_track_type /* type */) const {
102         return INVALID_OPERATION;
103     }
104 
selectTrackSource105     virtual status_t selectTrack(size_t /* trackIndex */, bool /* select */, int64_t /* timeUs*/) {
106         return INVALID_OPERATION;
107     }
108 
seekToSource109     virtual status_t seekTo(int64_t /* seekTimeUs */) {
110         return INVALID_OPERATION;
111     }
112 
setBuffersSource113     virtual status_t setBuffers(bool /* audio */, Vector<MediaBuffer *> &/* buffers */) {
114         return INVALID_OPERATION;
115     }
116 
isRealTimeSource117     virtual bool isRealTime() const {
118         return false;
119     }
120 
isStreamingSource121     virtual bool isStreaming() const {
122         return true;
123     }
124 
125 protected:
~SourceSource126     virtual ~Source() {}
127 
128     virtual void onMessageReceived(const sp<AMessage> &msg);
129 
dupNotifySource130     sp<AMessage> dupNotify() const { return mNotify->dup(); }
131 
132     void notifyFlagsChanged(uint32_t flags);
133     void notifyVideoSizeChanged(const sp<AMessage> &format = NULL);
134     void notifyInstantiateSecureDecoders(const sp<AMessage> &reply);
135     void notifyPrepared(status_t err = OK);
136 
137 private:
138     sp<AMessage> mNotify;
139 
140     DISALLOW_EVIL_CONSTRUCTORS(Source);
141 };
142 
143 }  // namespace android
144 
145 #endif  // NUPLAYER_SOURCE_H_
146 
147