EncoderL8s - Condenses 16 bit PCM data stream to 8 bits data. Most microcontrollers can not process 8 bit audio data directly. 8 bit data however is very memory efficient and helps if you need to store audio on constrained resources. This encoder translates 16bit data into 8bit data. By default the encoded data is represented as uint8_t, so the values are from 0 to 255. More...

#include <CodecL8.h>

Inheritance diagram for EncoderL8:

Public Member Functions
	EncoderL8 (bool isSigned=false)

	EncoderL8 (Print &out)

AudioInfo	audioInfo ()
	provides the actual input AudioInfo

virtual AudioInfo	audioInfoOut ()
	provides the actual output AudioInfo: this is usually the same as audioInfo() unless we use a transforming stream

bool	begin () override
	starts the processing using the actual RAWAudioInfo

virtual bool	begin (AudioInfo info)

bool	begin (Print &out)
	starts the processing

int16_t	convertSample (int16_t sample)

void	end () override
	stops the processing

bool	isOpen ()

const char *	mime () override
	Provides "audio/pcm".

	operator bool () override

void	setAudioInfo (AudioInfo from) override
	Defines the sample rate, number of channels and bits per sample.

void	setOutput (Print &out_stream) override
	Defines the output Stream.

void	setSigned (bool isSigned)
	By default the encoded values are unsigned, but can change them to signed.

size_t	write (const void *in_ptr, size_t in_size) override
	Writes PCM data to be encoded as RAW.

Protected Member Functions
void	writeBlocking (Print out, uint8_t data, size_t len)

Protected Attributes
Vector< int8_t >	buffer

AudioInfo	info

bool	is_open

bool	is_signed = false

Print *	p_print = nullptr

Detailed Description

EncoderL8s - Condenses 16 bit PCM data stream to 8 bits data. Most microcontrollers can not process 8 bit audio data directly. 8 bit data however is very memory efficient and helps if you need to store audio on constrained resources. This encoder translates 16bit data into 8bit data. By default the encoded data is represented as uint8_t, so the values are from 0 to 255.

Author: Phil Schatzmann

Copyright: GPLv3

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

src/AudioCodecs/CodecL8.h

Public Member Functions

Protected Member Functions

Protected Attributes

Detailed Description