diff options
| -rw-r--r-- | sound/adpcm.cpp | 6 |
1 files changed, 4 insertions, 2 deletions
diff --git a/sound/adpcm.cpp b/sound/adpcm.cpp index d04cb7c67c..55b84112b6 100644 --- a/sound/adpcm.cpp +++ b/sound/adpcm.cpp @@ -27,7 +27,10 @@ // Routines to convert 12 bit linear samples to the -// Dialogic or Oki ADPCM coding format aka VOX +// Dialogic or Oki ADPCM coding format aka VOX. +// See also <http://www.comptek.ru/telephony/tnotes/tt1-13.html> +// +// In addition, also IMA ADPCM is supported. class ADPCMInputStream : public AudioStream { private: bool _evenPos; @@ -196,7 +199,6 @@ int16 ADPCMInputStream::imaADPCMDecode(byte code) { E += SS/2; if (code & 0x04) E += SS; - diff = (code & 0x08) ? -E : E; samp = _status.last + diff; |