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1 /*
2  * Copyright (C) 2014 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_AUDIO_FAST_CAPTURE_STATE_H
18 #define ANDROID_AUDIO_FAST_CAPTURE_STATE_H
19 
20 #include <media/nbaio/NBAIO.h>
21 #include "FastThreadState.h"
22 #include <private/media/AudioTrackShared.h>
23 
24 namespace android {
25 
26 // Represent a single state of the fast capture
27 struct FastCaptureState : FastThreadState {
28                 FastCaptureState();
29     /*virtual*/ ~FastCaptureState();
30 
31     // all pointer fields use raw pointers; objects are owned and ref-counted by RecordThread
32     NBAIO_Source*   mInputSource;       // HAL input device, must already be negotiated
33     // FIXME by renaming, could pull up these fields to FastThreadState
34     int             mInputSourceGen;    // increment when mInputSource is assigned
35     NBAIO_Sink*     mPipeSink;          // after reading from input source, write to this pipe sink
36     int             mPipeSinkGen;       // increment when mPipeSink is assigned
37     size_t          mFrameCount;        // number of frames per fast capture buffer
38     audio_track_cblk_t* mCblk;          // control block for the single fast client, or NULL
39 
40     // Extends FastThreadState::Command
41     static const Command
42         // The following commands also process configuration changes, and can be "or"ed:
43         READ = 0x8,                     // read from input source
44         WRITE = 0x10,                   // write to pipe sink
45         READ_WRITE = 0x18;              // read from input source and write to pipe sink
46 
47     // never returns NULL; asserts if command is invalid
48     static const char *commandToString(Command command);
49 };  // struct FastCaptureState
50 
51 }   // namespace android
52 
53 #endif  // ANDROID_AUDIO_FAST_CAPTURE_STATE_H
54