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
17#ifndef ANDROID_AAUDIO_AUDIO_STREAM_INTERNAL_PLAY_H
18#define ANDROID_AAUDIO_AUDIO_STREAM_INTERNAL_PLAY_H
19
20#include <stdint.h>
21#include <aaudio/AAudio.h>
22
23#include "binding/AAudioServiceInterface.h"
24#include "client/AudioStreamInternal.h"
25
26using android::sp;
27using android::IAAudioService;
28
29namespace aaudio {
30
31class AudioStreamInternalPlay : public AudioStreamInternal {
32public:
33    AudioStreamInternalPlay(AAudioServiceInterface  &serviceInterface, bool inService = false);
34    virtual ~AudioStreamInternalPlay();
35
36    aaudio_result_t write(const void *buffer,
37                          int32_t numFrames,
38                          int64_t timeoutNanoseconds) override;
39
40    int64_t getFramesRead() override;
41    int64_t getFramesWritten() override;
42
43    void *callbackLoop() override;
44
45    aaudio_direction_t getDirection() const override {
46        return AAUDIO_DIRECTION_OUTPUT;
47    }
48
49protected:
50/**
51 * Low level write that will not block. It will just write as much as it can.
52 *
53 * It passed back a recommended time to wake up if wakeTimePtr is not NULL.
54 *
55 * @return the number of frames written 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;
61private:
62    /*
63     * Asynchronous write with data conversion.
64     * @param buffer
65     * @param numFrames
66     * @return fdrames written or negative error
67     */
68    aaudio_result_t writeNowWithConversion(const void *buffer,
69                                           int32_t numFrames);
70
71    int64_t                  mLastFramesRead = 0; // used to prevent retrograde motion
72};
73
74} /* namespace aaudio */
75
76#endif //ANDROID_AAUDIO_AUDIO_STREAM_INTERNAL_PLAY_H
77