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      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 
     29 namespace aaudio {
     30 
     31 /**
     32  * Internal stream that uses the legacy AudioRecord path.
     33  */
     34 class AudioStreamRecord : public AudioStreamLegacy {
     35 public:
     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 
     79 private:
     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