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2023-06-16
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2023-05-27
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2022-09-17
 DigitalCD Related Modules
Introduction TimPlayer AudioMPEG # DiskSample DCDUtils

DiskSample 32-bit 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.
Page updated the 2023-05-27.