OpenShot Audio Library | OpenShotAudio: juce_BufferingAudioFormatReader.h Source File

OpenShot Audio Library | OpenShotAudio 0.3.0

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juce_BufferingAudioFormatReader.h
1/*
2 ==============================================================================
3
4 This file is part of the JUCE library.
5 Copyright (c) 2017 - ROLI Ltd.
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 5 End-User License
11 Agreement and JUCE 5 Privacy Policy (both updated and effective as of the
12 27th April 2017).
13
14 End User License Agreement: www.juce.com/juce-5-licence
15 Privacy Policy: www.juce.com/juce-5-privacy-policy
16
17 Or: You may also use this code under the terms of the GPL v3 (see
18 www.gnu.org/licenses).
19
20 JUCE IS PROVIDED "AS IS" WITHOUT ANY WARRANTY, AND ALL WARRANTIES, WHETHER
21 EXPRESSED OR IMPLIED, INCLUDING MERCHANTABILITY AND FITNESS FOR PURPOSE, ARE
22 DISCLAIMED.
23
24 ==============================================================================
25*/
26
27namespace juce
28{
29
30//==============================================================================
39 class JUCE_API BufferingAudioReader : public AudioFormatReader,
40 private TimeSliceClient
41{
42public:
53 BufferingAudioReader (AudioFormatReader* sourceReader,
54 TimeSliceThread& timeSliceThread,
55 int samplesToBuffer);
56
57 ~BufferingAudioReader() override;
58
64 void setReadTimeout (int timeoutMilliseconds) noexcept;
65
66 bool readSamples (int** destSamples, int numDestChannels, int startOffsetInDestBuffer,
67 int64 startSampleInFile, int numSamples) override;
68
69private:
70 std::unique_ptr<AudioFormatReader> source;
71 TimeSliceThread& thread;
72 std::atomic<int64> nextReadPosition { 0 };
73 const int numBlocks;
74 int timeoutMs = 0;
75
76 enum { samplesPerBlock = 32768 };
77
78 struct BufferedBlock
79 {
80 BufferedBlock (AudioFormatReader& reader, int64 pos, int numSamples);
81
82 Range<int64> range;
83 AudioBuffer<float> buffer;
84 };
85
86 CriticalSection lock;
87 OwnedArray<BufferedBlock> blocks;
88
89 BufferedBlock* getBlockContaining (int64 pos) const noexcept;
90 int useTimeSlice() override;
91 bool readNextBufferChunk();
92
93 JUCE_DECLARE_NON_COPYABLE_WITH_LEAK_DETECTOR (BufferingAudioReader)
94};
95
96} // namespace juce
juce::AudioBuffer
Definition: juce_AudioSampleBuffer.h:34
juce::AudioFormatReader
Definition: juce_AudioFormatReader.h:45
juce::BufferingAudioReader
Definition: juce_BufferingAudioFormatReader.h:41
juce::CriticalSection
Definition: juce_CriticalSection.h:43
juce::OwnedArray
Definition: juce_OwnedArray.h:51
juce::Range
Definition: juce_Range.h:40
juce::TimeSliceClient
Definition: juce_TimeSliceThread.h:44
juce::TimeSliceThread
Definition: juce_TimeSliceThread.h:83