arduino-audio-tools
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A simple class to determine the volume. You can use it as final output or as output or input in your audio chain. More...
#include <AudioStreams.h>
Public Member Functions | |
VolumeMeter (AudioOutput &ao) | |
VolumeMeter (AudioStream &as) | |
VolumeMeter (Print &print) | |
VolumeMeter (Stream &stream) | |
virtual void | addNotifyAudioChange (AudioInfoSupport &bi) |
Adds target to be notified about audio changes. | |
virtual AudioInfo | audioInfo () override |
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 int | available () override |
virtual int | availableForWrite () override |
bool | begin () override |
bool | begin (AudioInfo info) |
void | clear () |
Resets the actual volume. | |
virtual void | clearNotifyAudioChange () |
Deletes all change notify subscriptions. | |
virtual void | end () |
virtual void | flush () override |
bool | isNotifyActive () |
Checks if the automatic AudioInfo update is active. | |
virtual | operator bool () |
size_t | readBytes (uint8_t *data, size_t len) |
virtual size_t | readSilence (uint8_t *buffer, size_t length) |
Source to generate silence: just sets the buffer to 0. | |
virtual bool | removeNotifyAudioChange (AudioInfoSupport &bi) |
Removes a target in order not to be notified about audio changes. | |
void | setAudioInfo (AudioInfo info) |
Defines the input AudioInfo. | |
void | setNotifyActive (bool flag) |
Deactivate/Reactivate automatic AudioInfo updates: (default is active) | |
void | setOutput (Print &out) override |
Defines/Changes the output target. | |
void | setStream (Stream &io) override |
Defines/Changes the input & output. | |
float | volume () |
float | volume (int channel) |
float | volumeAvg () |
Average volume of all channels. | |
float | volumeAvg (int channel) |
Average volume of indicated channel. | |
float | volumeDB () |
Volume in db: max amplitude is 0 (range: -1000 to 0) | |
float | volumeDB (int channel) |
Volume of indicated channel in db: max amplitude is 0. | |
float | volumePercent () |
Volume in %: max amplitude is 100. | |
float | volumePercent (int channel) |
Volume of indicated channel in %: max amplitude is 100. | |
float | volumeRatio () |
Volume Ratio: max amplitude is 1.0. | |
float | volumeRatio (int channel) |
Volume Ratio of indicated channel: max amplitude is 1.0. | |
size_t | write (const uint8_t *data, size_t len) |
virtual size_t | write (uint8_t ch) override |
virtual void | writeSilence (size_t len) |
Writes len bytes of silence (=0). | |
Protected Member Functions | |
void | commit () |
virtual int | not_supported (int out, const char *msg="") |
void | notifyAudioChange (AudioInfo info) |
void | refillReadBuffer () |
void | updateVolume (float tmp, int j) |
void | updateVolumes (const uint8_t *data, size_t len) |
template<typename T > | |
void | updateVolumesT (const uint8_t *buffer, size_t size) |
Protected Attributes | |
int | _timeout = 10 |
float | f_volume = 0 |
float | f_volume_tmp = 0 |
AudioInfo | info |
bool | is_notify_active = true |
Vector< AudioInfoSupport * > | notify_vector |
Print * | p_out = nullptr |
Stream * | p_stream = nullptr |
size_t | sample_count_per_channel = 0 |
Vector< float > | sum {0} |
Vector< float > | sum_tmp {0} |
RingBuffer< uint8_t > | tmp_in {0} |
RingBuffer< uint8_t > | tmp_out {0} |
Vector< float > | volumes {0} |
Vector< float > | volumes_tmp {0} |
A simple class to determine the volume. You can use it as final output or as output or input in your audio chain.
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inlinevirtualinherited |
Adds target to be notified about audio changes.
Reimplemented in CodecNOP, MP3DecoderMAD, EncodedAudioOutput, EncodedAudioStream, AACDecoderFDK, DecoderBasic, MP3DecoderHelix, OggContainerDecoder, Pipeline, and Pipeline::ModifyingStreamAdapter.
provides the actual input AudioInfo
Implements AudioInfoSupport.
Reimplemented in JupyterAudioT< T >, MozziStream, TimerCallbackAudioStream, PureDataStream, AdapterAudioOutputToAudioStream, GeneratedSoundStream< T >, and GeneratedSoundStream< int16_t >.
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.
Reimplemented from Stream.
Reimplemented in AudioKitStream, A2DPStream, AudioFFTBase, HLSStream, I2SCodecStream, TfLiteAudioStream, UDPStream, ICYStreamT< T >, BufferedTaskStream, I2SStream, TimedStream, GeneratedSoundStream< T >, GeneratedSoundStream< int16_t >, BufferedStream, ConverterStream< T >, InputMerge< T >, Pipeline::ModifyingStreamAdapter, and VolumeStream.
Reimplemented from Print.
Reimplemented in UDPStream, A2DPStream, AudioFFTBase, I2SCodecStream, AbstractURLStream, URLStreamESP32, I2SStream, MeasuringStream, ProgressStream, and VolumeStream.
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inlineoverridevirtual |
Reimplemented from BaseStream.
Reimplemented in FaustStream< DSP >, HLSStream, I2SCodecStream, VS1053Stream, WM8960Stream, ESPNowStream, I2SStream, TimerCallbackAudioStream, QueueStream< T >, QueueStream< uint8_t >, AudioFFTBase, AudioKitStream, AnalogAudioStream, HttpRequest, ICYStreamT< T >, GeneratedSoundStream< T >, GeneratedSoundStream< int16_t >, InputMixer< T >, InputMerge< T >, and Pipeline.
Reimplemented from Print.
Reimplemented in ResampleStream, BufferedTaskStream, and BufferedStream.
Reimplemented in A2DPStream, Pipeline, I2SStream, and MemoryStream.
Reimplemented from AudioStream.
Defines the input AudioInfo.
Reimplemented from AudioStream.
Defines/Changes the output target.
Implements ModifyingStream.
Defines/Changes the input & output.
Implements ModifyingStream.
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inline |
Determines the volume (max amplitude). The range depends on the bits_per_sample.
Determines the volume for the indicated channel. You must call the begin method to define the number of channels
Reimplemented from AudioStream.
Reimplemented in BufferedTaskStream, and BufferedStream.