AudioSourceIdxSDMMC Class Reference

ESP32 AudioSource for AudioPlayer using an SD card as data source. An index file is used to speed up the access to the audio files by index. This class is based on the Arduino SD_MMC implementation Connect the SD card to the following pins: More...

#include <AudioSourceIdxSDMMC.h>

Inheritance diagram for AudioSourceIdxSDMMC:

Public Member Functions
	AudioSourceIdxSDMMC (const char *startFilePath="/", const char *ext=".mp3", bool setupIndex=true)
	Default constructor.
virtual bool	begin () override
	Reset actual stream and move to root.
void	end ()
int	index ()
	Provides the current index position.
int	indexOf (const char *filename)
	Provides the index of the file with the given name.
virtual bool	isAutoNext ()
	Returns default setting go to the next.
const char *	name (int pos)
	Provides the file name for the indicated index.
virtual Stream *	nextStream (int offset=1) override
	Returns next audio stream.
Stream *	operator[] (int idx)
	access with array syntax
virtual Stream *	previousStream (int offset)
	Returns previous audio stream.
virtual Stream *	selectStream (const char *path) override
	Returns audio stream by path: The index is not changed!
virtual Stream *	selectStream (int index) override
void	setFileFilter (const char *filter)
virtual Stream *	setIndex (int index)
	same as selectStream - I just prefer this name
virtual bool	setMetadataCallback (void(*fn)(MetaDataType info, const char *str, int len), ID3TypeSelection sel=SELECT_ICY)
virtual void	setPath (const char *p)
	Allows to "correct" the start path if not defined in the constructor.
virtual void	setTimeout (int millisec)
	Sets the timeout of Stream in milliseconds.
virtual void	setTimeoutAutoNext (int millisec)
long	size ()
	Provides the number of files (The max index is size()-1)
virtual int	timeoutAutoNext ()
	Provides the timeout which is triggering to move to the next stream.
const char *	toStr ()
	provides the actual file name

Protected Attributes
const char *	exension = nullptr
File	file
const char *	file_name
const char *	file_name_pattern = "*"
SDIndex< fs::SDMMCFS, fs::File >	idx {SD_MMC}
size_t	idx_pos = 0
bool	is_sd_setup = false
bool	setup_index = true
const char *	start_path = nullptr
int	timeout_auto_next_value = 500

Detailed Description

ESP32 AudioSource for AudioPlayer using an SD card as data source. An index file is used to speed up the access to the audio files by index. This class is based on the Arduino SD_MMC implementation Connect the SD card to the following pins:

SD Card | ESP32 D2 12 D3 13 CMD 15 VSS GND VDD 3.3V CLK 14 VSS GND D0 2 (add 1K pull up after flashing) D1 4

On the AI Thinker boards the pin settings should be On, On, On, On, On,

Author

Phil Schatzmann

Copyright

GPLv3

Member Function Documentation

begin()

virtual bool begin ( )

inlineoverridevirtual

Reset actual stream and move to root.

Implements AudioSource.

index()

int index ( )

inlinevirtual

Provides the current index position.

Reimplemented from AudioSource.

isAutoNext()

virtual bool isAutoNext ( )

inlinevirtual

Returns default setting go to the next.

Reimplemented from AudioSource.

nextStream()

virtual Stream * nextStream ( int  offset = 1 )

inlineoverridevirtual

Returns next audio stream.

Implements AudioSource.

previousStream()

virtual Stream * previousStream ( int  offset )

inlinevirtualinherited

Returns previous audio stream.

Reimplemented in AudioSourceFTP< ClientType >, and AudioSourceURL.

selectStream() [1/2]

virtual Stream * selectStream ( const char *  path )

inlineoverridevirtual

Returns audio stream by path: The index is not changed!

Implements AudioSource.

selectStream() [2/2]

virtual Stream * selectStream ( int  index )

inlineoverridevirtual

Returns audio stream at the indicated index (the index is zero based, so the first value is 0!)

Reimplemented from AudioSource.

setFileFilter()

void setFileFilter ( const char *  filter )

inline

Defines the regex filter criteria for selecting files. E.g. ".*Bob Dylan.*"

setTimeout()

virtual void setTimeout ( int  millisec )

inlinevirtualinherited

Sets the timeout of Stream in milliseconds.

Reimplemented in AudioSourceURL, and AudioSourceSDFAT< AudioFs, AudioFile >.

setTimeoutAutoNext()

virtual void setTimeoutAutoNext ( int  millisec )

inlinevirtualinherited

Sets the timeout which is triggering to move to the next stream. - the default value is 500 ms

toStr()

const char * toStr ( )

inlinevirtual

provides the actual file name

Reimplemented from AudioSource.

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The documentation for this class was generated from the following file:

• src/AudioTools/Disk/AudioSourceIdxSDMMC.h