Applies low pass filter to a decimated pdm signal to convert it to pcm. More...
#include <PDMStream.h>
Inheritance diagram for PDMMonoStreamT< T >:
Public Member Functions | |
| PDMMonoStreamT (Stream &in) | |
| 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 | |
| AudioInfo | audioInfoPDM () |
| int | available () |
| virtual int | availableForWrite () override |
| bool | begin () |
| bool | begin (AudioInfo info) |
| virtual void | clearNotifyAudioChange () |
| Deletes all change notify subscriptions. | |
| int | decimation () |
| 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. | |
| virtual void | setAudioInfo (AudioInfo newInfo) override |
| Defines the input AudioInfo. | |
| void | setDecimationFactor (int factor) |
| template<size_t B> | |
| void | setFilterValues (const T(&b)[B]) |
| void | setNotifyActive (bool flag) |
| Deactivate/Reactivate automatic AudioInfo updates: (default is active) | |
| virtual 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 | |
| constexpr int8_t | bitsPerSample () |
| virtual int | not_supported (int out, const char *msg="") |
| void | notifyAudioChange (AudioInfo info) |
| void | refillReadBuffer () |
Protected Attributes | |
| int | _timeout = 10 |
| float | coef [19] |
| int | decimation_factor = sizeof(T) * 2 |
| DecimationStreamExt< T > | decimation_stream |
| FIR< float > | fir {coef} |
| FilteredStream< T, float > | in_filtered {decimation_stream, 1} |
| AudioInfo | info |
| bool | is_notify_active = true |
| Vector< AudioInfoSupport * > | notify_vector |
| RingBuffer< uint8_t > | tmp_in {0} |
| RingBuffer< uint8_t > | tmp_out {0} |
Detailed Description
template<typename T>
class audio_tools::PDMMonoStreamT< T >
Applies low pass filter to a decimated pdm signal to convert it to pcm.
- Copyright
- GPLv3
Member Data Documentation
◆ coef
|
protected |
Initial value:
= {
-0.000704420658475743, -0.000537879918926308, 0.004114637509913062,
-0.012685775806621488, 0.027889173789107543, -0.049285026985058301,
0.074005079283040689, -0.097330704866957815, 0.114052040962871595,
0.880965753382213723, 0.114052040962871595, -0.097330704866957843,
0.074005079283040717, -0.049285026985058301, 0.027889173789107550,
-0.012685775806621504, 0.004114637509913064, -0.000537879918926308,
-0.000704420658475743}
The documentation for this class was generated from the following file:
- src/AudioTools/Sandbox/PDMStream.h
