OpenShot Audio Library | OpenShotAudio 0.3.2
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#include <juce_SubregionStream.h>
Wraps another input stream, and reads from a specific part of it.
This lets you take a subsection of a stream and present it as an entire stream in its own right.
Definition at line 34 of file juce_SubregionStream.h.
juce::SubregionStream::SubregionStream | ( | InputStream * | sourceStream, |
int64 | startPositionInSourceStream, | ||
int64 | lengthOfSourceStream, | ||
bool | deleteSourceWhenDestroyed | ||
) |
Creates a SubregionStream from an input source.
sourceStream | the source stream to read from |
startPositionInSourceStream | this is the position in the source stream that corresponds to position 0 in this stream |
lengthOfSourceStream | this specifies the maximum number of bytes from the source stream that will be passed through by this stream. When the position of this stream exceeds lengthOfSourceStream, it will cause an end-of-stream. If the length passed in here is greater than the length of the source stream (as returned by getTotalLength()), then the smaller value will be used. Passing a negative value for this parameter means it will keep reading until the source's end-of-stream. |
deleteSourceWhenDestroyed | whether the sourceStream that is passed in should be deleted by this object when it is itself deleted. |
Definition at line 26 of file juce_SubregionStream.cpp.
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override |
Destructor.
This may also delete the source stream, if that option was chosen when the buffered stream was created.
Definition at line 36 of file juce_SubregionStream.cpp.
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overridevirtual |
Returns the offset of the next byte that will be read from the stream.
Implements juce::InputStream.
Definition at line 48 of file juce_SubregionStream.cpp.
Referenced by isExhausted(), and read().
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overridevirtual |
Returns the total number of bytes available for reading in this stream.
Note that this is the number of bytes available from the start of the stream, not from the current position.
If the size of the stream isn't actually known, this will return -1.
Implements juce::InputStream.
Definition at line 40 of file juce_SubregionStream.cpp.
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overridevirtual |
Returns true if the stream has no more data to read.
Implements juce::InputStream.
Definition at line 73 of file juce_SubregionStream.cpp.
Reads some data from the stream into a memory buffer.
This is the only read method that subclasses actually need to implement, as the InputStream base class implements the other read methods in terms of this one (although it's often more efficient for subclasses to implement them directly).
destBuffer | the destination buffer for the data. This must not be null. |
maxBytesToRead | the maximum number of bytes to read - make sure the memory block passed in is big enough to contain this many bytes. This value must not be negative. |
Implements juce::InputStream.
Definition at line 58 of file juce_SubregionStream.cpp.
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overridevirtual |
Tries to move the current read position of the stream.
The position is an absolute number of bytes from the stream's start.
Some streams might not be able to do this, in which case they should do nothing and return false. Others might be able to manage it by resetting themselves and skipping to the correct position, although this is obviously a bit slow.
Implements juce::InputStream.
Definition at line 53 of file juce_SubregionStream.cpp.
Referenced by SubregionStream().