arduino-audio-tools
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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>
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 |
Print * | p_print = nullptr |
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.