D B G P R I N T Send a line of info to serial output. Works like vsprintf(), but checks the DEBUG flag. Print only if DEBUG flag is true. Always re

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* Function: GetBits * * Description: get bits from bitstream, advance bitstream pointer * * Inputs: pointer to initialized aac_BitStreamIn

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S E T D A T A M O D E Change the datamode and show in debug for testing.

C L A I M S P I Claim the SPI bus. Uses FreeRTOS semaphores. If the semaphore cannot be claimed within the time-out period, the function continues w

R E L E A S E S P I Free the the SPI bus. Uses FreeRTOS semaphores.

T F T S E T Request to display a segment on TFT. Version for char* and String parameter.

T F T S E T Request to display a segment on TFT. Version for char* and String parameter.

M Y Q U E U E S E N D Send to queue if existing.

O L E D :: P R I N T Put a character in the buffer.

T R I G G E R Set request for an item to publish to MQTT.

T R I G G E R Set request for an item to publish to MQTT.

N V S G E T S T R Read a string from nvs.

N V S S E A R C H Check if key exists in nvs.

S E T D A T A M O D E Change the datamode and show in debug for testing.

T F T L O G Log to TFT if enabled.

* Function: MP3ClearBadFrame * * Description: zero out pcm buffer if error decoding MP3 frame * * Inputs: mp3DecInfo struct with corre

C H O M P Do some filtering on de inputstring: - String comment part (starting with "#"). - Strip trailing CR. - Strip leading spaces. - Strip traili

N V S G E T S T R Read a string from nvs.

N V S S E A R C H Check if key exists in nvs.

N V S S E T S T R Put a key/value pair in nvs. Length is limited to allow easy read-back. No writing if no change.

A N A L Y Z E C M D Handling of the various commands from remote webclient, Serial or MQTT. Version for handling string with: <parameter>=<value>

A N A L Y Z E C M D Handling of the various commands from remote webclient, Serial or MQTT. Version for handling string with: <parameter>=<value>

D I S P L A Y T I M E Show the time on the LCD at a fixed position in a specified color To prevent flickering, only the changed part of the timestrin

G E T S D F I L E N A M E Get a filespec from mp3names at index. If index is negative, a random track is selected.

N V S S E T S T R Put a key/value pair in nvs. Length is limited to allow easy read-back. No writing if no change.

T F T L O G Log to display.

* Function: AdvanceBitstream * * Description: move bitstream pointer ahead * * Inputs: number of bits to advance bitstream * * Outputs:

* Function: DecodeOneSymbol * * Description: dequantize one Huffman symbol from bitstream, * using table huffTabSBR[huffTabIndex]

* Function: InvRNormalized * * Description: use Newton's method to solve for x = 1/r * * Inputs: r = Q31, range = [0.5, 1) (normalize your

* Function: UnpackZeros * * Description: fill a section of coefficients with zeros * * Inputs: number of coefficients * * Outputs: n

C H O M P Do some filtering on de inputstring: - String comment part (starting with "#"). - Strip trailing CR. - Strip leading spaces. - Strip traili

Set the player baas/treble, 4 nibbles for treble gain/freq and bass gain/freq

Q U E U E T O P T Queue a special function for the play task. These are high priority messages like stop or start. So we make sure the message fits.

S S C O N V Convert an array with 4 "synchsafe integers" to a number. There are 7 bits used per byte.

S T O P _ M P 3 C L I E N T Disconnect from the server.

* Function: ByteAlignBitstream * * Description: bump bitstream pointer to start of next byte * * Inputs: none * * Outputs: byte-alig

returns 64-bit value in [edx:eax] */

* Function: DecodeHuffmanScalar * * Description: decode one Huffman symbol from bitstream * * Inputs: pointers to Huffman table and info s

* Function: DecodeSBREnvelope * * Description: decode delta Huffman coded envelope scalefactors from bitstream * * Inputs: initialized SBR

* Function: DecodeSBRNoise * * Description: decode delta Huffman coded noise scalefactors from bitstream * * Inputs: initialized SBRGrid s

* Function: GetBitsNoAdvance * * Description: get bits from bitstream, do not advance bitstream pointer * * Inputs: pointer to initialized

* Function: SetBitstreamPointer * * Description: initialize bitstream reader * * Inputs: number of bytes in bitstream * poin

* Function: UnpackDeltaTimeFreq * * Description: unpack time/freq flags for delta coding of SBR envelopes (table 4.63) * * Inputs: BitStre

G E T F S F I L E N A M E Get filename for a node ID. Search on SD or USB.

* Function: BubbleSort * * Description: in-place sort of uint8_ts * * Inputs: buffer of elements to sort * number of element

* Function: CalcBitsUsed * * Description: calculate how many bits have been read from bitstream * * Inputs: pointer to start of bitstream

* Function: UnpackInverseFilterMode * * Description: unpack invf flags for chirp factor calculation (table 4.64) * * Inputs: BitStreamInfo

* Function: UnpackSBRGrid * * Description: unpack SBR grid (table 4.62) * * Inputs: BitStreamInfo struct pointing to start of SBR grid *

D S P _U P D A T E _ L I N E Show a selected line

G E T C U R R E N T S D F I L E N A M E Get current filespec from mp3names.

M P 3 L O O P Called from the main loop() for the mp3 functions. A connection to an MP3 server is active and we are ready to receive data. Normally t

R E A D H O S T F R O M P R E F Read the mp3 host from the preferences specified by the parameter. The host will be returned. We search for "preset_x

R E A D H O S T F R O M P R E F Read the mp3 host from the preferences specified by the parameter. The host will be returned. We search for "preset_x

S E L E C T N E X T F S N O D E Select the next or previous mp3 file from USB or SD card.

S H O W S T R E A M T I T L E Show artist and songtitle if present in metadata. Show always if full=true.

U T F 8 A S C I I _ I P In Place conversion UTF8-string to Extended ASCII (ASCII is shorter!).

X M L P A R S E Parses line with XML data and put result in variable specified by parameter.

* Function: DecodeOneScaleFactor * * Description: decode one scalefactor using scalefactor Huffman codebook * * Inputs: none * * Outputs

* Function: FDCT32 * * Description: Ken's highly-optimized 32-point DCT (radix-4 + radix-8) * * Inputs: input buffer, length = 32 samp

* Function: FFT32C * * Description: Ken's very fast in-place radix-4 decimation-in-time FFT * * Inputs: buffer of 32 complex samples (befo

D S P _U P D A T E _ L I N E Show a selected line The resulting line is a scrolling part of the complete line. The startposition is ncremented by on

* Function: PostMultiply64 * * Description: post-twiddle stage of 64-point type-IV DCT * * Inputs: buffer of 64 samples * nu

* Function: PreMultiply64 * * Description: pre-twiddle stage of 64-point DCT-IV * * Inputs: buffer of 64 samples * * Outputs: proces

* Function: QMFSynthesis * * Description: 64-subband synthesis QMF (4.6.18.4.2) * * Inputs: 64 consecutive complex subband QMF samples, fo

* Function: SqrtFix * * Description: use binary search to calculate sqrt(q) * * Inputs: q = Q30 * number of fraction bits in

* Function: UnpackSinusoids * * Description: unpack sinusoid (harmonic) flags for each SBR subband (table 4.67) * * Inputs: BitStreamInfo

C L O S E _ S D C A R D Close file on SD card.

G E T C O N T E N T T Y P E Returns the contenttype of a file to send.

H A N D L E F S F Handling of requesting pages from the PROGMEM. Example: favicon.ico

H T T P H E A D E R Set http headers to a string.

12-point inverse DCT, used in IMDCT12x3() * 4 input guard bits will ensure no overflow */

N E X T P R E S E T Set the preset for the next station. May be relative.

N V S O P E N Open Preferences with my-app namespace. Each application module, library, etc. has to use namespace name to prevent key name collisions

N V S O P E N Open Preferences with my-app namespace. Each application module, library, etc. has to use namespace name to prevent key name collisions

L C D 1 6 0 2 :: P R I N T Put a character in the buffer.

L C D 1 6 0 2 :: P R I N T Put a character in the buffer.

L C D 2 0 0 4 :: P R I N T Put a character in the buffer.

R E S E R V E P I N Set I/O pin to "reserved". The pin is than not available for a programmable function.