OpenShot Audio Library | OpenShotAudio 0.4.0

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juce_BufferingAudioFormatReader.h
1/*
2 ==============================================================================
3
4 This file is part of the JUCE library.
5 Copyright (c) 2022 - Raw Material Software Limited
6
7 JUCE is an open source library subject to commercial or open-source
8 licensing.
9
10 By using JUCE, you agree to the terms of both the JUCE 7 End-User License
11 Agreement and JUCE Privacy Policy.
12
13 End User License Agreement: www.juce.com/juce-7-licence
14 Privacy Policy: www.juce.com/juce-privacy-policy
15
16 Or: You may also use this code under the terms of the GPL v3 (see
17 www.gnu.org/licenses).
18
19 JUCE IS PROVIDED "AS IS" WITHOUT ANY WARRANTY, AND ALL WARRANTIES, WHETHER
20 EXPRESSED OR IMPLIED, INCLUDING MERCHANTABILITY AND FITNESS FOR PURPOSE, ARE
21 DISCLAIMED.
22
23 ==============================================================================
24*/
25
26 namespace juce
27{
28
29//==============================================================================
38 class JUCE_API BufferingAudioReader : public AudioFormatReader,
39 private TimeSliceClient
40{
41 public:
52 BufferingAudioReader (AudioFormatReader* sourceReader,
53 TimeSliceThread& timeSliceThread,
54 int samplesToBuffer);
55
56 ~BufferingAudioReader() override;
57
63 void setReadTimeout (int timeoutMilliseconds) noexcept;
64
65 //==============================================================================
66 bool readSamples (int* const* destSamples, int numDestChannels, int startOffsetInDestBuffer,
67 int64 startSampleInFile, int numSamples) override;
68
69 private:
70 struct BufferedBlock
71 {
72 BufferedBlock (AudioFormatReader& reader, int64 pos, int numSamples);
73
74 Range<int64> range;
75 AudioBuffer<float> buffer;
76 bool allSamplesRead = false;
77 };
78
79 int useTimeSlice() override;
80 BufferedBlock* getBlockContaining (int64 pos) const noexcept;
81 bool readNextBufferChunk();
82
83 static constexpr int samplesPerBlock = 32768;
84
85 std::unique_ptr<AudioFormatReader> source;
86 TimeSliceThread& thread;
87 std::atomic<int64> nextReadPosition { 0 };
88 const int numBlocks;
89 int timeoutMs = 0;
90
91 CriticalSection lock;
92 OwnedArray<BufferedBlock> blocks;
93
94 JUCE_DECLARE_NON_COPYABLE_WITH_LEAK_DETECTOR (BufferingAudioReader)
95};
96
97} // namespace juce
juce::AudioBuffer
Definition juce_AudioSampleBuffer.h:34
juce::AudioFormatReader
Definition juce_AudioFormatReader.h:44
juce::BufferingAudioReader
Definition juce_BufferingAudioFormatReader.h:40
juce::CriticalSection
Definition juce_CriticalSection.h:43
juce::OwnedArray
Definition juce_OwnedArray.h:50
juce::Range
Definition juce_Range.h:40
juce::TimeSliceClient
Definition juce_TimeSliceThread.h:44
juce::TimeSliceThread
Definition juce_TimeSliceThread.h:83