RecordTracks.h revision 6ae6b811666865815ebb1f670aacb1a0f2edaa73 
1/*
2**
3** Copyright 2012, The Android Open Source Project
4**
5** Licensed under the Apache License, Version 2.0 (the "License");
6** you may not use this file except in compliance with the License.
7** You may obtain a copy of the License at
8**
9**     http://www.apache.org/licenses/LICENSE-2.0
10**
11** Unless required by applicable law or agreed to in writing, software
12** distributed under the License is distributed on an "AS IS" BASIS,
13** WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
14** See the License for the specific language governing permissions and
15** limitations under the License.
16*/
17
18#ifndef INCLUDING_FROM_AUDIOFLINGER_H
19    #error This header file should only be included from AudioFlinger.h
20#endif
21
22// record track
23class RecordTrack : public TrackBase {
24public:
25                        RecordTrack(RecordThread *thread,
26                                const sp<Client>& client,
27                                uint32_t sampleRate,
28                                audio_format_t format,
29                                audio_channel_mask_t channelMask,
30                                size_t frameCount,
31                                int sessionId);
32    virtual             ~RecordTrack();
33
34    virtual status_t    start(AudioSystem::sync_event_t event, int triggerSession);
35    virtual void        stop();
36
37            void        destroy();
38
39            // clear the buffer overflow flag
40            void        clearOverflow() { mOverflow = false; }
41            // set the buffer overflow flag and return previous value
42            bool        setOverflow() { bool tmp = mOverflow; mOverflow = true;
43                                                return tmp; }
44
45    static  void        appendDumpHeader(String8& result);
46            void        dump(char* buffer, size_t size);
47
48private:
49    friend class AudioFlinger;  // for mState
50
51                        RecordTrack(const RecordTrack&);
52                        RecordTrack& operator = (const RecordTrack&);
53
54    // AudioBufferProvider interface
55    virtual status_t getNextBuffer(AudioBufferProvider::Buffer* buffer,
56                                   int64_t pts = kInvalidPTS);
57    // releaseBuffer() not overridden
58
59    bool                mOverflow;  // overflow on most recent attempt to fill client buffer
60};
61