DiskSample is an audio player module capable of playing multiple files or streams at once. The file formats supported are:

• Audio MPEG, with the help of the AudioMPEG module.
• AC3, with the help of the AC3 module. The source code of that module is based on Liba52 (GPL license) and distributed with the documentation of the modules.
• Flac (Free Audio Lossless Codec).
• Vorbis, with the help of the Vorbis module.
• WAVE files, limited to uncompressed PCM or Audio MPEG

For download of the modules and the documentation, refer to DigitalCD's download section.

Version 0.58, 2023-05-27

Changes:

• Metadata, parse APETAGEX metadata.
• Metadata, parse some ID3v2 tags (when no unsynchronisation or decompression is required).
• DiskCvrt, save to WAVE file:
  • use bits per sample specified (PCM, FLAC) instead of always 16-bit samples.
  • add WAVEFORMATEXTENSIBLE if more than 2 channels (cf. channel layout) or if valid bits per sample does not match bits per sample (multiple of 8 bits).
  • when possible add available metadata (title, ...) to the WAVE file.

Bugs Fixes:

• Stream, enlarge file loading chunk size for very large bit rates (ex: 24-bit at 192KHz with 8 channels) to avoid input buffer starvation (which can still occur if the input buffer itself is too small).
• Stream, fix spurious bitrates and durations while streaming.
• DiskCvrt, don't create output file if file can't be decoded.
• AAC, fix multi-channel mapping when saving as WAV file.
• AAC, synchronized with latest libfaad2.
• AAC, fix some confusing error reporting from libfaad2.
• AAC, add some extra channel configurations.
• AAC, libfaad2 has a faulty fixed point drc_decode() implementation.
• AAC, add/move a few huffman table offset checks in libfaad2.
• AAC, libfaad2 incorrectly assumes fill element (with sbr) imediatedly follows SCE/CPE element. Split SCE/CPE element decoding and reconstruction, remove special handling of fill element from the decoding and delay reconstruction till new element/end of frame. Now can play Fronhaufer's test file '7.1auditionOutLeader_v2_rtb.mp4'.
• FLAC, corrected 5.0, 5.1 WAVE mappings.
• FLAC, added 6.1 and 7.1 support.
• FLAC, fix incorrect position reported (occurs on loop on track, small total size and 4MB output buffers).
• FLAC, fix decoder sometimes doing nothing after a position change.
• FLAC, fix looping/seeking issues in the absence of seek table.
• FLAC, skip too large seek table instead of reporting the memory alloaction error.
• FLAC, fix failing to parse vorbis comments when large info like cue sheet is present.
• FLAC, provide minimal output buffer size to ensure that we can play file if the output buffer configuration is too small.
• FLAC, change bit reading function limit from 24-bit to 32-bit to cope with large residues on some of the conformance test files.
• WAVE, was skipping metadata with a single character (like a track number).
• WAVE, now read metadata located at the end of the file.

Version 0.57, 2022-09-17

Changes:

• Codecs, support AAC-LC + SBR + PS in MP4 files or encapsulated in ADTS frames (.aac files, radio streaming).
• Http, preparatory work for IPv6 (untested and disabled till Resolver situation is clarified).

Bugs Fixes:

• Http, relinked with socklib5 instead of socklib.

Version 0.56, 2021-09-10

Changes:

• Stream, extended StreamDecoding, 10 to timestamp input.
• Stream, force StreamParam R2 to 0 for numeric param even if returning an error (for the sake of callers not checking errors).
• DiscCvrt, if source filetype is data, use filename extension to try to determine codec to use.

Bugs Fixes:

• Http, downloading to a file (as used by DigialCD for the yellow pages) didn't stop once all the data was doanloaded.
• Vorbis, fix divide by 0 when trying to play an OggFlac.
• Vorbis, fix unaligned STRs when playing non-stereo files.

Version 0.55, 2018-08-16

Changes:

• Plays RAW CD files (filetype 0CD).

Bugs Fixes:

• HTTP headers should be treated as case insensitive.

Version 0.54, 2017-06-05

Changes:

• Call sub-modules processes directly instead of waiting for callbacks so that their CPU usage is taken into account.
• Faster skipping of unused metadata.

Bugs Fixes:

• Fixed rare case of stream signaling its completion while it is 'buffering'.
• Fixed incorrect position info sometimes returned at the very start of a stream.

Version 0.53, 2016-06-10

Bugs Fixes:

• Http, dereferences null pointer when URL contains no path.
• Http, end of fixed size streams was not detected anymore.

Version 0.52, 2016-05-08

Changes:

• SWI Configure code 7, add 1<<31 to band number to read current params.
• New SWI Configure code 14 to select parallel or serial equalizer filters working mode.

Bugs Fixes:

• HTTP redirection was broken.

Version 0.51, 2014-08-12

Changes:

• Config, Maximal input buffer size increase from 1MB to 2MB.
• SWIs, Added SWI StreamChain.

Bugs Fixes:

• Codecs, PCM, forgot to clear the output buffer after changing position in file.

Version 0.50, 2012-09-27

Bugs Fixes:

• FLAC, error while decoding RICE2 partitions.

Version 0.49, 2012-09-01

Bugs Fixes:

• WAV codec modified to cope with files where 'fmt ' chunk is not the first one in the file.

Version 0.48, 2012-03-05

Bugs Fixes:

• WAV PCM, recompiled for ARMv7 compatibility.

Version 0.47, 2011-09-27

Changes:

• New code to SWI StreamParams returning album date.

Bugs Fixes:

• FLAC, error in applying LPC of order 1 (assembler version)

Version 0.46, 2010-04-20

Changes:

• Plays WAV PCM with > 2 channels.
• Plays Ogg Vorbis with > 2 channels.

Bugs Fixes:

• WAV PCM, fix incorrect loop point.
• WAV PCM, keep account of WAVEEXTENSIBLE format.

Version 0.45, 2010-01-26

Bug Fixes:

• MP3 without MPEG sync code would remain indefinitely as 'not ready'.
• Was attempting file reads from callback while still opening file.
• Ignore errors in file reads from callback to cope with some network FS.

Version 0.44, 2009-12-03

Changes:

• Recompiled for ARMv7 compatibility.

Bugs Fixes:

• Altering position in a FLAC would store a temporary incorrect position value.

Version 0.43, 2009-02-21

Changes:

• Mix With multiple streams, when end up restoring ourselves as previous handler in 8-bit mode, causing a background crash.
• Extract track number from ID3v1 tag

Version 0.42, 2008-05-25

Changes:

• Bug in FLAC sync detection made 24-bit FLACs unplayable.

Version 0.41, 2008-01-26

Changes:

• Decode files of type &A8F as AC3.

Version 0.40, 2008-01-12

Changes:

• Support for FLAC and WAVE (PCM only).
• Fixes for Vorbis replay of files containg a succession of small independant streams
• Fixes in positionning to keep metadata into account.

Version 0.39, 2007-03-11

Changes:

• Additional output info flag for KinoAMP.
• Better volume scaling.
• Return correct error code when WAVE sub-format is not supported.