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 <media/AudioBufferProvider.h>
22 #include "FastThreadState.h"
23 #include <private/media/AudioTrackShared.h>
24 
25 namespace android {
26 
27 // Represent a single state of the fast capture
28 struct FastCaptureState : FastThreadState {
29                 FastCaptureState();
30     /*virtual*/ ~FastCaptureState();
31 
32     // all pointer fields use raw pointers; objects are owned and ref-counted by RecordThread
33     NBAIO_Source*   mInputSource;       // HAL input device, must already be negotiated
34     // FIXME by renaming, could pull up these fields to FastThreadState
35     int             mInputSourceGen;    // increment when mInputSource is assigned
36     NBAIO_Sink*     mPipeSink;          // after reading from input source, write to this pipe sink
37     int             mPipeSinkGen;       // increment when mPipeSink is assigned
38     size_t          mFrameCount;        // number of frames per fast capture buffer
39     audio_track_cblk_t* mCblk;          // control block for the single fast client, or NULL
40 
41     audio_format_t  mFastPatchRecordFormat = AUDIO_FORMAT_INVALID;
42     AudioBufferProvider* mFastPatchRecordBufferProvider = nullptr;   // a reference to a patch
43                                                                      // record in fast mode
44 
45     // Extends FastThreadState::Command
46     static const Command
47         // The following commands also process configuration changes, and can be "or"ed:
48         READ = 0x8,                     // read from input source
49         WRITE = 0x10,                   // write to pipe sink
50         READ_WRITE = 0x18;              // read from input source and write to pipe sink
51 
52     // never returns NULL; asserts if command is invalid
53     static const char *commandToString(Command command);
54 };  // struct FastCaptureState
55 
56 }   // namespace android
57 
58 #endif  // ANDROID_AUDIO_FAST_CAPTURE_STATE_H
59