OpenShot Audio Library | OpenShotAudio 0.4.0

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juce_AudioSubsectionReader.cpp
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 AudioSubsectionReader::AudioSubsectionReader (AudioFormatReader* sourceToUse,
30 int64 startSampleToUse, int64 lengthToUse,
31 bool deleteSource)
32 : AudioFormatReader (nullptr, sourceToUse->getFormatName()),
33 source (sourceToUse),
34 startSample (startSampleToUse),
35 deleteSourceWhenDeleted (deleteSource)
36{
37 length = jmin (jmax ((int64) 0, source->lengthInSamples - startSample), lengthToUse);
38
39 sampleRate = source->sampleRate;
40 bitsPerSample = source->bitsPerSample;
41 lengthInSamples = length;
42 numChannels = source->numChannels;
43 usesFloatingPointData = source->usesFloatingPointData;
44}
45
46 AudioSubsectionReader::~AudioSubsectionReader()
47{
48 if (deleteSourceWhenDeleted)
49 delete source;
50}
51
52//==============================================================================
53 bool AudioSubsectionReader::readSamples (int* const* destSamples, int numDestChannels, int startOffsetInDestBuffer,
54 int64 startSampleInFile, int numSamples)
55{
56 clearSamplesBeyondAvailableLength (destSamples, numDestChannels, startOffsetInDestBuffer,
57 startSampleInFile, numSamples, length);
58
59 if (numSamples <= 0)
60 return true;
61
62 return source->readSamples (destSamples, numDestChannels, startOffsetInDestBuffer,
63 startSampleInFile + startSample, numSamples);
64}
65
66 void AudioSubsectionReader::readMaxLevels (int64 startSampleInFile, int64 numSamples, Range<float>* results, int numChannelsToRead)
67{
68 startSampleInFile = jmax ((int64) 0, startSampleInFile);
69 numSamples = jmax ((int64) 0, jmin (numSamples, length - startSampleInFile));
70
71 source->readMaxLevels (startSampleInFile + startSample, numSamples, results, numChannelsToRead);
72}
73
74} // namespace juce
juce::AudioFormatReader
Definition juce_AudioFormatReader.h:44
juce::AudioFormatReader::usesFloatingPointData
bool usesFloatingPointData
Definition juce_AudioFormatReader.h:237
juce::AudioFormatReader::clearSamplesBeyondAvailableLength
static void clearSamplesBeyondAvailableLength(int *const *destChannels, int numDestChannels, int startOffsetInDestBuffer, int64 startSampleInFile, int &numSamples, int64 fileLengthInSamples)
Definition juce_AudioFormatReader.h:309
juce::AudioFormatReader::lengthInSamples
int64 lengthInSamples
Definition juce_AudioFormatReader.h:231
juce::AudioFormatReader::sampleRate
double sampleRate
Definition juce_AudioFormatReader.h:225
juce::AudioFormatReader::readSamples
virtual bool readSamples(int *const *destChannels, int numDestChannels, int startOffsetInDestBuffer, int64 startSampleInFile, int numSamples)=0
juce::AudioFormatReader::bitsPerSample
unsigned int bitsPerSample
Definition juce_AudioFormatReader.h:228
juce::AudioFormatReader::readMaxLevels
virtual void readMaxLevels(int64 startSample, int64 numSamples, Range< float > *results, int numChannelsToRead)
Definition juce_AudioFormatReader.cpp:209
juce::AudioFormatReader::numChannels
unsigned int numChannels
Definition juce_AudioFormatReader.h:234
juce::AudioSubsectionReader::AudioSubsectionReader
AudioSubsectionReader(AudioFormatReader *sourceReader, int64 subsectionStartSample, int64 subsectionLength, bool deleteSourceWhenDeleted)
Definition juce_AudioSubsectionReader.cpp:29
juce::AudioSubsectionReader::~AudioSubsectionReader
~AudioSubsectionReader() override
Definition juce_AudioSubsectionReader.cpp:46
juce::AudioSubsectionReader::readMaxLevels
void readMaxLevels(int64 startSample, int64 numSamples, Range< float > *results, int numChannelsToRead) override
Definition juce_AudioSubsectionReader.cpp:66
juce::AudioSubsectionReader::readSamples
bool readSamples(int *const *destSamples, int numDestChannels, int startOffsetInDestBuffer, int64 startSampleInFile, int numSamples) override
Definition juce_AudioSubsectionReader.cpp:53
juce::Range
Definition juce_Range.h:40