1 /* 2 * Copyright 2019 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 OBOE_SOURCE_I24_CALLER_H 18 #define OBOE_SOURCE_I24_CALLER_H 19 20 #include <unistd.h> 21 #include <sys/types.h> 22 23 #include "flowgraph/FlowGraphNode.h" 24 #include "AudioSourceCaller.h" 25 #include "FixedBlockReader.h" 26 27 namespace oboe { 28 29 /** 30 * AudioSource that uses callback to get more data. 31 */ 32 class SourceI24Caller : public AudioSourceCaller { 33 public: SourceI24Caller(int32_t channelCount,int32_t framesPerCallback)34 SourceI24Caller(int32_t channelCount, int32_t framesPerCallback) 35 : AudioSourceCaller(channelCount, framesPerCallback, kBytesPerI24Packed) { 36 mConversionBuffer = std::make_unique<uint8_t[]>(static_cast<size_t>(kBytesPerI24Packed) 37 * static_cast<size_t>(channelCount) 38 * static_cast<size_t>(output.getFramesPerBuffer())); 39 } 40 41 int32_t onProcess(int32_t numFrames) override; 42 getName()43 const char *getName() override { 44 return "SourceI24Caller"; 45 } 46 47 private: 48 std::unique_ptr<uint8_t[]> mConversionBuffer; 49 static constexpr int kBytesPerI24Packed = 3; 50 }; 51 52 } 53 #endif //OBOE_SOURCE_I16_CALLER_H 54