arduino-audio-tools
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CallbackStream: A Stream that allows to register callback methods for accessing and providing data. The callbacks can be lambda expressions. More...
#include <AudioStreams.h>
Public Member Functions | |
CallbackStream (Print &out, size_t(*cb_update)(uint8_t *data, size_t len)) | |
Allows to change the audio before sending it to the output. | |
CallbackStream (size_t(*cb_read)(uint8_t *data, size_t len), size_t(*cb_write)(const uint8_t *data, size_t len)) | |
CallbackStream (Stream &io, size_t(*cb_update)(uint8_t *data, size_t len)) | |
Allows to change the audio before sending it to the output or before getting it from the original input. | |
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 | |
int | available () override |
virtual int | availableForWrite () override |
virtual bool | begin () override |
virtual bool | begin (AudioInfo info) |
virtual void | clearNotifyAudioChange () |
Deletes all change notify subscriptions. | |
void | end () override |
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) override |
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. | |
virtual void | setAudioInfo (AudioInfo newInfo) override |
Defines the input AudioInfo. | |
void | setAvailable (int val) |
optioinally define available bytes for next read | |
void | setAvailableCallback (int(*cb)()) |
void | setNotifyActive (bool flag) |
Deactivate/Reactivate automatic AudioInfo updates: (default is active) | |
void | setOutput (Print &out) |
Defines/Changes the output target. | |
void | setOutput (Stream &in) |
same as setStream | |
void | setReadCallback (size_t(*cb_read)(uint8_t *data, size_t len)) |
void | setStream (Print &out) |
same as set Output | |
void | setStream (Stream &in) |
Defines/Changes the input & output. | |
void | setUpdateCallback (size_t(*cb_update)(uint8_t *data, size_t len)) |
void | setWriteCallback (size_t(*cb_write)(const uint8_t *data, size_t len)) |
size_t | write (const uint8_t *data, size_t len) override |
virtual size_t | write (uint8_t ch) override |
virtual void | writeSilence (size_t len) |
Writes len bytes of silence (=0). | |
Protected Member Functions | |
virtual int | not_supported (int out, const char *msg="") |
void | notifyAudioChange (AudioInfo info) |
void | refillReadBuffer () |
Protected Attributes | |
int | _timeout = 10 |
bool | active =true |
int | available_bytes = -1 |
int(* | cb_available )() = nullptr |
size_t(* | cb_read )(uint8_t *data, size_t len) = nullptr |
size_t(* | cb_update )(uint8_t *data, size_t len) = nullptr |
size_t(* | cb_write )(const uint8_t *data, size_t len) = nullptr |
AudioInfo | info |
bool | is_notify_active = true |
Vector< AudioInfoSupport * > | notify_vector |
Print * | p_out = nullptr |
Stream * | p_stream = nullptr |
RingBuffer< uint8_t > | tmp_in {0} |
RingBuffer< uint8_t > | tmp_out {0} |
CallbackStream: A Stream that allows to register callback methods for accessing and providing data. The callbacks can be lambda expressions.