1 /*
2  * Copyright (C) 2017 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 #ifndef ANDROID_AAUDIO_AUDIO_STREAM_INTERNAL_CAPTURE_H
17 #define ANDROID_AAUDIO_AUDIO_STREAM_INTERNAL_CAPTURE_H
18 
19 #include <stdint.h>
20 #include <aaudio/AAudio.h>
21 
22 #include "binding/AAudioServiceInterface.h"
23 #include "client/AudioStreamInternal.h"
24 
25 using android::sp;
26 
27 namespace aaudio {
28 
29 class AudioStreamInternalCapture : public AudioStreamInternal {
30 public:
31     AudioStreamInternalCapture(AAudioServiceInterface  &serviceInterface, bool inService = false);
32     virtual ~AudioStreamInternalCapture();
33 
34     aaudio_result_t read(void *buffer,
35                          int32_t numFrames,
36                          int64_t timeoutNanoseconds) override;
37 
38     int64_t getFramesRead() override;
39     int64_t getFramesWritten() override;
40 
41     void *callbackLoop() override;
42 
getDirection()43     aaudio_direction_t getDirection() const override {
44         return AAUDIO_DIRECTION_INPUT;
45     }
46 protected:
47 
48     void advanceClientToMatchServerPosition(int32_t serverOffset = 0) override;
49 
50 /**
51  * Low level data processing that will not block. It will just read or write as much as it can.
52  *
53  * It passes back a recommended time to wake up if wakeTimePtr is not NULL.
54  *
55  * @return the number of frames processed or a negative error code.
56  */
57     aaudio_result_t processDataNow(void *buffer,
58                                    int32_t numFrames,
59                                    int64_t currentTimeNanos,
60                                    int64_t *wakeTimePtr) override;
61 
62 private:
63     /*
64      * Asynchronous read with data conversion.
65      * @param buffer
66      * @param numFrames
67      * @return frames written or negative error
68      */
69     aaudio_result_t readNowWithConversion(void *buffer, int32_t numFrames);
70 };
71 
72 } /* namespace aaudio */
73 
74 #endif //ANDROID_AAUDIO_AUDIO_STREAM_INTERNAL_CAPTURE_H
75