Stream support for A2DP using https://github.com/pschatzmann/ESP32-A2DP: begin(TX_MODE) opens a a2dp_source and begin(RX_MODE) a a2dp_sink. The data is in int16_t with 2 channels at 44100 hertz. We support only one instance of the class! Please note that this is a conveniance class that supports the stream api, however this is rather inefficient, beause quite a big buffer needs to be allocated. It is recommended to use the API with the callbacks. Examples can be found in the a2dp examples directory starting with basic. More...
#include <A2DPStream.h>
Public Member Functions | |
| ~A2DPStream () | |
| Release the allocate a2dp_source or a2dp_sink. | |
| 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 |
| Provides the number of bytes available to read. | |
| int | availableForWrite () override |
| Provides the number of bytes available to write. | |
| virtual bool | begin () |
| bool | begin (A2DPConfig cfg) |
| Starts the processing. | |
| bool | begin (RxTxMode mode, const char *name) |
| Starts the processing. | |
| BaseBuffer< uint8_t > & | buffer () |
| Provides access to the buffer. | |
| virtual void | clearNotifyAudioChange () |
| Deletes all change notify subscriptions. | |
| A2DPConfig | defaultConfig (RxTxMode mode=RX_MODE) |
| void | end () override |
| virtual void | flush () override |
| bool | isConnected () |
| checks if we are connected | |
| bool | isNotifyActive () |
| Checks if the automatic AudioInfo update is active. | |
| bool | isReady () |
| is ready to process data | |
| operator bool () | |
| convert to bool | |
| size_t | readBytes (uint8_t *data, size_t len) override |
| Reads the data from the temporary buffer. | |
| 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 | setNotifyActive (bool flag) |
| Deactivate/Reactivate automatic AudioInfo updates: (default is active) | |
| void | setSilenceOnNoData (bool silence) |
| Manage config.silence_on_nodata dynamically. | |
| bool | setVolume (float volume) override |
| Define the volume (values between 0.0 and 1.0) | |
| BluetoothA2DPSink & | sink () |
| provides access to the BluetoothA2DPSink | |
| BluetoothA2DPSource & | source () |
| provides access to the | |
| virtual float | volume () |
| provides the actual volume in the range of 0.0f to 1.0f | |
| size_t | write (const uint8_t *data, size_t len) override |
| Writes the data into a temporary send buffer - where it can be picked up by the callback. | |
| 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 | notify_base_Info (int rate) |
| notify subscriber with AudioInfo | |
| void | notifyAudioChange (AudioInfo info) |
| void | refillReadBuffer () |
Static Protected Member Functions | |
| static void | a2dp_state_callback (esp_a2d_connection_state_t state, void *caller) |
| static void | a2dp_stream_sink_sound_data (const uint8_t *data, uint32_t len) |
| callback used by A2DP to write the sound data | |
| static int32_t | a2dp_stream_source_sound_data (uint8_t *data, int32_t len) |
| static bool | detected_device (const char *ssid, esp_bd_addr_t address, int rssi) |
| static void | sample_rate_callback (uint16_t rate) |
| callback to update audio info with used a2dp sample rate | |
Protected Attributes | |
| int | _timeout = 10 |
| BluetoothA2DPCommon * | a2dp =nullptr |
| const int | A2DP_MAX_VOL = 128 |
| BluetoothA2DPSink * | a2dp_sink = nullptr |
| BluetoothA2DPSource * | a2dp_source = nullptr |
| A2DPConfig | config |
| AudioInfo | info |
| bool | is_notify_active = true |
| Vector< AudioInfoSupport * > | notify_vector |
| RingBuffer< uint8_t > | tmp_in {0} |
| RingBuffer< uint8_t > | tmp_out {0} |
| float | volume_value = 1.0f |
Detailed Description
Stream support for A2DP using https://github.com/pschatzmann/ESP32-A2DP: begin(TX_MODE) opens a a2dp_source and begin(RX_MODE) a a2dp_sink. The data is in int16_t with 2 channels at 44100 hertz. We support only one instance of the class! Please note that this is a conveniance class that supports the stream api, however this is rather inefficient, beause quite a big buffer needs to be allocated. It is recommended to use the API with the callbacks. Examples can be found in the a2dp examples directory starting with basic.
Requires: https://github.com/pschatzmann/ESP32-A2DP
- Copyright
- GPLv3
The documentation for this class was generated from the following file:
- src/AudioTools/AudioLibs/A2DPStream.h
