1 /*
2  * Copyright 2016 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 LEGACY_AUDIO_STREAM_RECORD_H
18 #define LEGACY_AUDIO_STREAM_RECORD_H
19 
20 #include <media/AudioRecord.h>
21 #include <aaudio/AAudio.h>
22 
23 #include "AudioStreamBuilder.h"
24 #include "AudioStream.h"
25 #include "AAudioLegacy.h"
26 #include "legacy/AudioStreamLegacy.h"
27 #include "utility/FixedBlockWriter.h"
28 
29 namespace aaudio {
30 
31 /**
32  * Internal stream that uses the legacy AudioRecord path.
33  */
34 class AudioStreamRecord : public AudioStreamLegacy {
35 public:
36     AudioStreamRecord();
37 
38     virtual ~AudioStreamRecord();
39 
40     aaudio_result_t open(const AudioStreamBuilder & builder) override;
41     aaudio_result_t release_l() override;
42 
43     aaudio_result_t requestStart() override;
44     aaudio_result_t requestStop() override;
45 
46     virtual aaudio_result_t getTimestamp(clockid_t clockId,
47                                          int64_t *framePosition,
48                                          int64_t *timeNanoseconds) override;
49 
50     aaudio_result_t read(void *buffer,
51                              int32_t numFrames,
52                              int64_t timeoutNanoseconds) override;
53 
54     aaudio_result_t setBufferSize(int32_t requestedFrames) override;
55 
56     int32_t getBufferSize() const override;
57 
58     int32_t getBufferCapacity() const override;
59 
60     int32_t getXRunCount() const override;
61 
62     int64_t getFramesWritten() override;
63 
64     int32_t getFramesPerBurst() const override;
65 
66     aaudio_result_t updateStateMachine() override;
67 
getDirection()68     aaudio_direction_t getDirection() const override {
69         return AAUDIO_DIRECTION_INPUT;
70     }
71 
72     // This is public so it can be called from the C callback function.
73     void processCallback(int event, void *info) override;
74 
incrementClientFrameCounter(int32_t frames)75     int64_t incrementClientFrameCounter(int32_t frames) override {
76         return incrementFramesRead(frames);
77     }
78 
79     const void * maybeConvertDeviceData(const void *audioData, int32_t numFrames) override;
80 
81 private:
82     android::sp<android::AudioRecord> mAudioRecord;
83     // adapts between variable sized blocks and fixed size blocks
84     FixedBlockWriter                 mFixedBlockWriter;
85 
86     // TODO add 64-bit position reporting to AudioRecord and use it.
87     android::String16                mOpPackageName;
88 
89     // Only one type of conversion buffer is used.
90     std::unique_ptr<float[]>         mFormatConversionBufferFloat;
91     std::unique_ptr<int16_t[]>       mFormatConversionBufferI16;
92     int32_t                          mFormatConversionBufferSizeInFrames = 0;
93 };
94 
95 } /* namespace aaudio */
96 
97 #endif /* LEGACY_AUDIO_STREAM_RECORD_H */
98