roc::audio::BuiltinResampler Class Reference

Resamples audio stream with non-integer dynamically changing factor. More...

#include <resampler_builtin.h>

Inheritance diagram for roc::audio::BuiltinResampler:

Public Member Functions
	BuiltinResampler (core::IAllocator &allocator, core::BufferFactory< sample_t > &buffer_factory, ResamplerProfile profile, core::nanoseconds_t frame_length, const audio::SampleSpec &sample_spec)
	Initialize.
virtual bool	valid () const
	Check if object is successfully constructed.
virtual bool	set_scaling (size_t input_rate, size_t output_rate, float multiplier)
	Set new resample factor.
virtual const core::Slice< sample_t > &	begin_push_input ()
	Get buffer to be filled with input data.
virtual void	end_push_input ()
	Commit buffer with input data.
virtual size_t	pop_output (Frame &out)
	Read samples from input frame and fill output frame.
virtual bool	valid () const =0
	Check if object is successfully constructed.
virtual bool	set_scaling (size_t input_rate, size_t output_rate, float multiplier)=0
	Set new resample factor.
virtual const core::Slice< sample_t > &	begin_push_input ()=0
	Get buffer to be filled with input data.
virtual void	end_push_input ()=0
	Commit buffer with input data.
virtual size_t	pop_output (Frame &out)=0
	Read samples from input buffer and fill output frame.

Detailed Description

Resamples audio stream with non-integer dynamically changing factor.

Definition at line 32 of file resampler_builtin.h.

Constructor & Destructor Documentation

BuiltinResampler()

roc::audio::BuiltinResampler::BuiltinResampler	(	core::IAllocator &	allocator,
		core::BufferFactory< sample_t > &	buffer_factory,
		ResamplerProfile	profile,
		core::nanoseconds_t	frame_length,
		const audio::SampleSpec &	sample_spec
	)

Initialize.

Member Function Documentation

begin_push_input()

virtual const core::Slice< sample_t > & roc::audio::BuiltinResampler::begin_push_input ( )

virtual

Get buffer to be filled with input data.

Implements roc::audio::IResampler.

end_push_input()

virtual void roc::audio::BuiltinResampler::end_push_input ( )

virtual

Commit buffer with input data.

Implements roc::audio::IResampler.

pop_output()

virtual size_t roc::audio::BuiltinResampler::pop_output ( Frame &  out )

virtual

Read samples from input frame and fill output frame.

Implements roc::audio::IResampler.

set_scaling()

virtual bool roc::audio::BuiltinResampler::set_scaling ( size_t  input_rate, size_t  output_rate, float  multiplier  )

virtual

Set new resample factor.

Remarks

Resampling algorithm needs some window of input samples. The length of the window (length of sinc impulse response) is a compromise between SNR and speed. It depends on current resampling factor. So we choose length of input buffers to let it handle maximum length of input. If new scaling factor breaks equation this function returns false.

Implements roc::audio::IResampler.

valid()

virtual bool roc::audio::BuiltinResampler::valid ( ) const

virtual

Check if object is successfully constructed.

Implements roc::audio::IResampler.

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The documentation for this class was generated from the following file:

• roc_audio/resampler_builtin.h