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
27 namespace juce
28{
29
30 AudioSubsectionReader::AudioSubsectionReader (AudioFormatReader* sourceToUse,
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;
41 bitsPerSample = source->bitsPerSample;
42 lengthInSamples = length;
43 numChannels = source->numChannels;
44 usesFloatingPointData = source->usesFloatingPointData;
45}
46
47 AudioSubsectionReader::~AudioSubsectionReader()
48{
49 if (deleteSourceWhenDeleted)
50 delete source;
51}
52
53//==============================================================================
54 bool AudioSubsectionReader::readSamples (int** destSamples, int numDestChannels, int startOffsetInDestBuffer,
55 int64 startSampleInFile, int numSamples)
56{
57 clearSamplesBeyondAvailableLength (destSamples, numDestChannels, startOffsetInDestBuffer,
58 startSampleInFile, numSamples, length);
59
60 return source->readSamples (destSamples, numDestChannels, startOffsetInDestBuffer,
61 startSampleInFile + startSample, numSamples);
62}
63
64 void AudioSubsectionReader::readMaxLevels (int64 startSampleInFile, int64 numSamples, Range<float>* results, int numChannelsToRead)
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
juce::AudioFormatReader
Definition: juce_AudioFormatReader.h:45
juce::AudioFormatReader::usesFloatingPointData
bool usesFloatingPointData
Definition: juce_AudioFormatReader.h:234
juce::AudioFormatReader::clearSamplesBeyondAvailableLength
static void clearSamplesBeyondAvailableLength(int **destChannels, int numDestChannels, int startOffsetInDestBuffer, int64 startSampleInFile, int &numSamples, int64 fileLengthInSamples)
Definition: juce_AudioFormatReader.h:306
juce::AudioFormatReader::lengthInSamples
int64 lengthInSamples
Definition: juce_AudioFormatReader.h:228
juce::AudioFormatReader::sampleRate
double sampleRate
Definition: juce_AudioFormatReader.h:222
juce::AudioFormatReader::bitsPerSample
unsigned int bitsPerSample
Definition: juce_AudioFormatReader.h:225
juce::AudioFormatReader::readMaxLevels
virtual void readMaxLevels(int64 startSample, int64 numSamples, Range< float > *results, int numChannelsToRead)
Definition: juce_AudioFormatReader.cpp:198
juce::AudioFormatReader::readSamples
virtual bool readSamples(int **destChannels, int numDestChannels, int startOffsetInDestBuffer, int64 startSampleInFile, int numSamples)=0
juce::AudioFormatReader::numChannels
unsigned int numChannels
Definition: juce_AudioFormatReader.h:231
juce::AudioSubsectionReader::AudioSubsectionReader
AudioSubsectionReader(AudioFormatReader *sourceReader, int64 subsectionStartSample, int64 subsectionLength, bool deleteSourceWhenDeleted)
Definition: juce_AudioSubsectionReader.cpp:30
juce::AudioSubsectionReader::~AudioSubsectionReader
~AudioSubsectionReader() override
Definition: juce_AudioSubsectionReader.cpp:47
juce::AudioSubsectionReader::readMaxLevels
void readMaxLevels(int64 startSample, int64 numSamples, Range< float > *results, int numChannelsToRead) override
Definition: juce_AudioSubsectionReader.cpp:64
juce::AudioSubsectionReader::readSamples
bool readSamples(int **destSamples, int numDestChannels, int startOffsetInDestBuffer, int64 startSampleInFile, int numSamples) override
Definition: juce_AudioSubsectionReader.cpp:54
juce::Range
Definition: juce_Range.h:40