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_TRACK_H 18 #define LEGACY_AUDIO_STREAM_TRACK_H 19 20 #include <math.h> 21 #include <media/TrackPlayerBase.h> 22 #include <aaudio/AAudio.h> 23 24 #include "AudioStreamBuilder.h" 25 #include "AudioStream.h" 26 #include "legacy/AAudioLegacy.h" 27 #include "legacy/AudioStreamLegacy.h" 28 #include "utility/FixedBlockReader.h" 29 30 namespace aaudio { 31 32 /** 33 * Internal stream that uses the legacy AudioTrack path. 34 */ 35 class AudioStreamTrack : public AudioStreamLegacy, public android::TrackPlayerBase { 36 public: 37 AudioStreamTrack(); 38 39 virtual ~AudioStreamTrack(); 40 41 42 aaudio_result_t open(const AudioStreamBuilder & builder) override; 43 aaudio_result_t close() override; 44 45 aaudio_result_t requestStart() override; 46 aaudio_result_t requestPause() override; 47 aaudio_result_t requestFlush() override; 48 aaudio_result_t requestStop() override; 49 50 aaudio_result_t getTimestamp(clockid_t clockId, 51 int64_t *framePosition, 52 int64_t *timeNanoseconds) override; 53 54 aaudio_result_t write(const void *buffer, 55 int32_t numFrames, 56 int64_t timeoutNanoseconds) override; 57 58 aaudio_result_t setBufferSize(int32_t requestedFrames) override; 59 int32_t getBufferSize() const override; 60 int32_t getBufferCapacity() const override; 61 int32_t getFramesPerBurst()const override; 62 int32_t getXRunCount() const override; 63 64 int64_t getFramesRead() override; 65 getDirection()66 aaudio_direction_t getDirection() const override { 67 return AAUDIO_DIRECTION_OUTPUT; 68 } 69 70 aaudio_result_t updateStateWhileWaiting() override; 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 incrementFramesWritten(frames); 77 } 78 79 private: 80 81 // adapts between variable sized blocks and fixed size blocks 82 FixedBlockReader mFixedBlockReader; 83 84 // TODO add 64-bit position reporting to AudioRecord and use it. 85 aaudio_wrapping_frames_t mPositionWhenStarting = 0; 86 aaudio_wrapping_frames_t mPositionWhenPausing = 0; 87 }; 88 89 } /* namespace aaudio */ 90 91 #endif /* LEGACY_AUDIO_STREAM_TRACK_H */ 92