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      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/AAudioFlowGraph.h"
     25 #include "client/AudioStreamInternal.h"
     26 
     27 using android::sp;
     28 using android::IAAudioService;
     29 
     30 namespace aaudio {
     31 
     32 class AudioStreamInternalPlay : public AudioStreamInternal {
     33 public:
     34     AudioStreamInternalPlay(AAudioServiceInterface  &serviceInterface, bool inService = false);
     35     virtual ~AudioStreamInternalPlay();
     36 
     37     aaudio_result_t open(const AudioStreamBuilder &builder) override;
     38 
     39     aaudio_result_t requestPause() override;
     40 
     41     aaudio_result_t requestFlush() override;
     42 
     43     bool isFlushSupported() const override {
     44         // Only implement FLUSH for OUTPUT streams.
     45         return true;
     46     }
     47 
     48     bool isPauseSupported() const override {
     49         // Only implement PAUSE for OUTPUT streams.
     50         return true;
     51     }
     52 
     53     aaudio_result_t write(const void *buffer,
     54                           int32_t numFrames,
     55                           int64_t timeoutNanoseconds) override;
     56 
     57     int64_t getFramesRead() override;
     58     int64_t getFramesWritten() override;
     59 
     60     void *callbackLoop() override;
     61 
     62     aaudio_direction_t getDirection() const override {
     63         return AAUDIO_DIRECTION_OUTPUT;
     64     }
     65 
     66 protected:
     67 
     68     void advanceClientToMatchServerPosition() override;
     69 
     70     void onFlushFromServer() override;
     71 
     72     android::status_t doSetVolume() override;
     73 
     74 /**
     75  * Low level write that will not block. It will just write as much as it can.
     76  *
     77  * It passed back a recommended time to wake up if wakeTimePtr is not NULL.
     78  *
     79  * @return the number of frames written or a negative error code.
     80  */
     81     aaudio_result_t processDataNow(void *buffer,
     82                              int32_t numFrames,
     83                              int64_t currentTimeNanos,
     84                              int64_t *wakeTimePtr) override;
     85 private:
     86     /*
     87      * Asynchronous write with data conversion.
     88      * @param buffer
     89      * @param numFrames
     90      * @return fdrames written or negative error
     91      */
     92     aaudio_result_t writeNowWithConversion(const void *buffer,
     93                                            int32_t numFrames);
     94 
     95     int64_t                  mLastFramesRead = 0; // used to prevent retrograde motion
     96 
     97     AAudioFlowGraph          mFlowGraph;
     98 
     99 };
    100 
    101 } /* namespace aaudio */
    102 
    103 #endif //ANDROID_AAUDIO_AUDIO_STREAM_INTERNAL_PLAY_H
    104