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 26 using android::sp; 27 using android::IAAudioService; 28 29 namespace aaudio { 30 31 class AudioStreamInternalPlay : public AudioStreamInternal { 32 public: 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 getDirection()45 aaudio_direction_t getDirection() const override { 46 return AAUDIO_DIRECTION_OUTPUT; 47 } 48 49 protected: 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; 61 private: 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