arduino-audio-tools
Public Member Functions | Protected Member Functions | Protected Attributes | List of all members
EncoderL8 Class Reference

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:
AudioEncoder AudioWriter

Public Member Functions

 EncoderL8 (bool isSigned=false)
 
 EncoderL8 (Print &out)
 
void begin () override
 starts the processing using the actual RAWAudioInfo
 
virtual void begin (AudioInfo info)
 
void 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
 We actually do nothing with this.
 
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
 
bool is_open
 
bool is_signed = false
 
Printp_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

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