61 lines
1.9 KiB
C++
Vendored
61 lines
1.9 KiB
C++
Vendored
/*
|
|
* Copyright (C) 2017 The Android Open Source Project
|
|
*
|
|
* Licensed under the Apache License, Version 2.0 (the "License");
|
|
* you may not use this file except in compliance with the License.
|
|
* You may obtain a copy of the License at
|
|
*
|
|
* http://www.apache.org/licenses/LICENSE-2.0
|
|
*
|
|
* Unless required by applicable law or agreed to in writing, software
|
|
* distributed under the License is distributed on an "AS IS" BASIS,
|
|
* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
|
|
* See the License for the specific language governing permissions and
|
|
* limitations under the License.
|
|
*/
|
|
|
|
#ifndef AAUDIO_FIXED_BLOCK_READER_H
|
|
#define AAUDIO_FIXED_BLOCK_READER_H
|
|
|
|
#include <stdint.h>
|
|
|
|
#include "oboe_common_FixedBlockAdapter_android.h"
|
|
|
|
/**
|
|
* Read from a fixed-size block to a variable sized block.
|
|
*
|
|
* This can be used to convert a pull data flow from fixed sized buffers to variable sized buffers.
|
|
* An example would be an audio output callback that reads from the app.
|
|
*/
|
|
class FixedBlockReader : public FixedBlockAdapter
|
|
{
|
|
public:
|
|
FixedBlockReader(FixedBlockProcessor &fixedBlockProcessor);
|
|
|
|
virtual ~FixedBlockReader() = default;
|
|
|
|
int32_t open(int32_t bytesPerFixedBlock) override;
|
|
|
|
/**
|
|
* Read into a variable sized block.
|
|
*
|
|
* Note that if the fixed-sized blocks must be aligned, then the variable-sized blocks
|
|
* must have the same alignment.
|
|
* For example, if the fixed-size blocks must be a multiple of 8, then the variable-sized
|
|
* blocks must also be a multiple of 8.
|
|
*
|
|
* @param buffer
|
|
* @param numBytes
|
|
* @return Number of bytes read or a negative error code.
|
|
*/
|
|
int32_t read(uint8_t *buffer, int32_t numBytes);
|
|
|
|
private:
|
|
int32_t readFromStorage(uint8_t *buffer, int32_t numBytes);
|
|
|
|
int32_t mValid = 0; // Number of valid bytes in mStorage.
|
|
};
|
|
|
|
|
|
#endif /* AAUDIO_FIXED_BLOCK_READER_H */
|