arduino-audio-tools
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EncoderL16s - 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. More...
#include <CodecL16.h>
Public Member Functions | |
EncoderL16 (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 | |
virtual bool | begin () override |
starts the processing using the actual RAWAudioInfo | |
virtual bool | begin (AudioInfo info) |
bool | begin (Print &out) |
starts the processing | |
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. | |
virtual size_t | write (const uint8_t *data, size_t len) override |
Writes PCM data to be encoded as RAW. | |
Protected Member Functions | |
void | writeBlocking (Print *out, uint8_t *data, size_t len) |
Protected Attributes | |
AudioInfo | info |
bool | is_open |
Print * | p_print = nullptr |
EncoderL16s - 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.
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inlinevirtualinherited |
provides the actual input AudioInfo
Implements AudioInfoSupport.
Reimplemented in CodecNOP, and BinaryContainerEncoder.
provides the actual output AudioInfo: this is usually the same as audioInfo() unless we use a transforming stream
Reimplemented in PureDataStream, PWMAudioOutput, ChannelFormatConverterStreamT< T >, ChannelFormatConverterStream, NumberFormatConverterStreamT< TFrom, TTo >, NumberFormatConverterStream, FormatConverterStream, Pipeline, and ResampleStream.
starts the processing using the actual RAWAudioInfo
Implements AudioWriter.
Reimplemented in AACEncoderFDK.
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inlineoverridevirtual |
stops the processing
Implements AudioWriter.
Provides "audio/pcm".
Implements AudioEncoder.
Implements AudioWriter.
Defines the sample rate, number of channels and bits per sample.
Implements AudioWriter.
Reimplemented in MP3EncoderLAME, EncoderBasic, FLACEncoder, OpusAudioEncoder, WAVEncoder, CodecNOP, G7xxEncoder, BinaryContainerEncoder, and OggContainerEncoder.
Defines the output Stream.
Implements AudioWriter.
Writes PCM data to be encoded as RAW.
Implements AudioWriter.