AudioStreamRecord.h revision 87c9f646a94259d7c321c3b3d5947fa1778f5ac2
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
29namespace aaudio {
30
31/**
32 * Internal stream that uses the legacy AudioRecord path.
33 */
34class AudioStreamRecord : public AudioStreamLegacy {
35public:
36    AudioStreamRecord();
37
38    virtual ~AudioStreamRecord();
39
40    aaudio_result_t open(const AudioStreamBuilder & builder) override;
41    aaudio_result_t close() override;
42
43    aaudio_result_t requestStart() override;
44    aaudio_result_t requestPause() override;
45    aaudio_result_t requestFlush() override;
46    aaudio_result_t requestStop() override;
47
48    virtual aaudio_result_t getTimestamp(clockid_t clockId,
49                                         int64_t *framePosition,
50                                         int64_t *timeNanoseconds) override;
51
52    aaudio_result_t read(void *buffer,
53                             int32_t numFrames,
54                             int64_t timeoutNanoseconds) override;
55
56    aaudio_result_t setBufferSize(int32_t requestedFrames) override;
57
58    int32_t getBufferSize() const override;
59
60    int32_t getBufferCapacity() const override;
61
62    int32_t getXRunCount() const override;
63
64    int32_t getFramesPerBurst() const override;
65
66    aaudio_result_t updateStateWhileWaiting() override;
67
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
75    int64_t incrementClientFrameCounter(int32_t frames) override {
76        return incrementFramesRead(frames);
77    }
78
79private:
80    android::sp<android::AudioRecord> mAudioRecord;
81    // adapts between variable sized blocks and fixed size blocks
82    FixedBlockWriter                 mFixedBlockWriter;
83
84    // TODO add 64-bit position reporting to AudioRecord and use it.
85    android::String16                mOpPackageName;
86};
87
88} /* namespace aaudio */
89
90#endif /* LEGACY_AUDIO_STREAM_RECORD_H */
91