OpenShot Audio Library | OpenShotAudio 0.3.2
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juce_AudioSubsectionReader.cpp
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
31 int64 startSampleToUse, int64 lengthToUse,
32 bool deleteSource)
33 : AudioFormatReader (nullptr, sourceToUse->getFormatName()),
34 source (sourceToUse),
35 startSample (startSampleToUse),
36 deleteSourceWhenDeleted (deleteSource)
37{
38 length = jmin (jmax ((int64) 0, source->lengthInSamples - startSample), lengthToUse);
39
40 sampleRate = source->sampleRate;
42 lengthInSamples = length;
43 numChannels = source->numChannels;
45}
46
48{
49 if (deleteSourceWhenDeleted)
50 delete source;
51}
52
53//==============================================================================
63
65{
66 startSampleInFile = jmax ((int64) 0, startSampleInFile);
67 numSamples = jmax ((int64) 0, jmin (numSamples, length - startSampleInFile));
68
69 source->readMaxLevels (startSampleInFile + startSample, numSamples, results, numChannelsToRead);
70}
71
72} // namespace juce
static void clearSamplesBeyondAvailableLength(int **destChannels, int numDestChannels, int startOffsetInDestBuffer, int64 startSampleInFile, int &numSamples, int64 fileLengthInSamples)
virtual void readMaxLevels(int64 startSample, int64 numSamples, Range< float > *results, int numChannelsToRead)
virtual bool readSamples(int **destChannels, int numDestChannels, int startOffsetInDestBuffer, int64 startSampleInFile, int numSamples)=0
AudioSubsectionReader(AudioFormatReader *sourceReader, int64 subsectionStartSample, int64 subsectionLength, bool deleteSourceWhenDeleted)
void readMaxLevels(int64 startSample, int64 numSamples, Range< float > *results, int numChannelsToRead) override
bool readSamples(int **destSamples, int numDestChannels, int startOffsetInDestBuffer, int64 startSampleInFile, int numSamples) override