FLAC decoder

FLAC decoder features

• The FLAC decoder implementation support the following:

• Sampling rate: 8 kHz, 11.05 kHz, 12 kHz, 16 kHz, 22.05 kHz, 32 kHz, 44.1 kHz, and 48 kHz.

• Channel : stereo and mono

• Bits per samples : 16 bits

Specification and reference

Official website

• FLAC lossless audio codec is at https://xiph.org/flac.

Inbound licensing

• For licensing information please refer to FLAC’s official website: https://xiph.org/flac/license.html.

Performance

Memory information

The memory usage of the decoder in bytes is:

• Code/flash = 15744 + 2080 = 17824

• Data/RAM = 27936

Section	Size
.text	15744
.ro & .const	2080
.bss	27936

CPU usage

• Output frame size: 16384 bytes.

• CPU core clock in MHz: 20.97.

Track type	Duration of track in second	Performance MIPS of codec (in MHz)
48 kHz, stereo	76 s	30.7 MHz
32 kHz, stereo	76 s	20.3 MHz
8 kHz, stereo	37 s	5.34 MHz

Following test cases are performed:

• Audio format listening test

• Audio quality test

For all above test cases, test tracks are played through the end without any distortion, glitching, hanging, or crashing.