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 AAUDIO_FIXED_BLOCK_READER_H
18#define AAUDIO_FIXED_BLOCK_READER_H
19
20#include <stdint.h>
21
22#include "FixedBlockAdapter.h"
23
24/**
25 * Read from a fixed-size block to a variable sized block.
26 *
27 * This can be used to convert a pull data flow from fixed sized buffers to variable sized buffers.
28 * An example would be an audio output callback that reads from the app.
29 */
30class FixedBlockReader : public FixedBlockAdapter
31{
32public:
33    FixedBlockReader(FixedBlockProcessor &fixedBlockProcessor);
34
35    virtual ~FixedBlockReader() = default;
36
37    int32_t open(int32_t bytesPerFixedBlock) override;
38
39    int32_t readFromStorage(uint8_t *buffer, int32_t numBytes);
40
41    /**
42     * Read into a variable sized block.
43     */
44    int32_t processVariableBlock(uint8_t *buffer, int32_t numBytes) override;
45};
46
47
48#endif /* AAUDIO_FIXED_BLOCK_READER_H */
49