diff options
Diffstat (limited to 'gst/modplug/libmodplug/changes.txt')
| -rw-r--r-- | gst/modplug/libmodplug/changes.txt | 159 |
1 files changed, 159 insertions, 0 deletions
diff --git a/gst/modplug/libmodplug/changes.txt b/gst/modplug/libmodplug/changes.txt new file mode 100644 index 000000000..340912f1f --- /dev/null +++ b/gst/modplug/libmodplug/changes.txt @@ -0,0 +1,159 @@ +changes:
+date = 09-feb-2001 [Markus Fick]
+-> file: fastmix.cpp
+ where: spline creation, spline macros
+ what: added unity gain clamp code, added Quantizer_Bits(shift) preprocessor constants
+ where: fir creation, fir macros
+ what: - removed x<pi/2 condition in coef creation
+ - added quantizer_bits(shift) preprocessor constants
+ - set default quantizer bits to 15 instead 14 (scale now 32768 instead 16384)
+ there should not occure any overflows during fir response calculation because
+ of the symmetric form of filter and the position of the negative fir coefs
+ - changed final volume calculation for 16bit samples (quality enhancement)
+
+date = 08-feb-2001 [Markus Fick]
+-> file: sndmix.cpp
+ where: function ReadNote()
+ what: modified behaviour of modplug so that interpolation is only deactivated if
+ a) the user selects "no interpolation"
+ b) linear interpolation is set and speed incr. > 0xff00
+ => if spline or fir is active then we use always interpolation
+
+-> file: fastmix.cpp
+ where: spline macros
+ what: changed spline macros to use precalculated tables (way faster)
+ where: file
+ what: - implemented spline table precalculator
+ - changed fir precalculator + macros (for higher quality and clearer source)
+ - added some comments and documentation
+ comment:
+ - preprocessor constant: SPLINE_FRACBITS
+ ) controls quality/memory usage
+ range is [4..14] inclusive
+ 4 = low quality, low memory usage
+ 14 = highest quality, highest memory usage (1L<<14)*4*2 bytes
+ - preprocessor constant: WFIR_FRACBITS
+ ) controls quality/memory usage
+ range is [4..12] inclusive
+ 4 = low quality, low mu
+ 12 = highest quality, highest memory usage ((1L<<(12+1))+1)*8*2 bytes
+
+date = 07-feb-2001 [Markus Fick]
+-> file: fastmix.cpp
+ where: spline macros
+ what: fixed error in coef calculation
+
+date = 07-feb-2001 [Markus Fick]
+-> file: sndfile.h
+ where: class definition of soundfile
+ what: removed InitFIR + DoneFIR function prototypes
+-> file: sndfile.cpp
+ function:CSoundFile::CSoundFile()
+ what: [modify] removed call to CSoundFile::InitFIRMixer( )
+
+ function:CSoundFile::~CSoundFile()
+ what: [modify] removed call to CSoundFile::DoneFIRMixer( )
+-> file: fastmix.cpp
+ where: spline macros
+ what: changed formula + added some guard bits to calculation
+
+ where: fir macros + implementation
+ what: - moved CSoundfile::FIR funtions to CzFIR (single instance sfir)
+ - changed fir macros to support CzFIR class
+
+date = 06-feb-2001 [Markus Fick]
+-> file: fastmix.cpp
+ where: macros
+ what: - removed fir filter with coef interpolation
+ - add spline interpolation
+ RM: now modplug->select( SPLINE ) selects spline and
+ modplug->select( POLYPHASE ) selects 8tap fir filter
+
+date = 05-feb-2001 [Markus Fick]
+-> file: fastmix.cpp
+ where: macros + filter order
+ what: [modify] changed filter order to 8 instead of 10
+
+-> file: fastmix.cpp
+ what: new macros+switch for fir-interpolator with coef interpolation
+
+date = 04-feb-2001 [Markus Fick]
+
+-> file: sndfile.h
+ where: class CSoundFile (bottom)
+ what: [add] methods for FIR mixer support
+ 1. int InitFIRInterpolator( );
+ 2. int DoneFIRInterpolator( );
+
+-> file: sndfile.cpp
+ function:CSoundFile::CSoundFile()
+ what: [modify] add call to CSoundFile::InitFIRMixer( )
+
+ function:CSoundFile::~CSoundFile()
+ what: [modify] add call to CSoundFile::DoneFIRMixer( )
+
+-> file: fastmix.cpp
+ new include: <math.h>
+ why: need it for fir-coef calculation
+ new function: CSoundFile::InitFIRMixer( ) // initializes fir filter lookup (if necessary)
+ new function: CSoundFile::DoneFIRMixer( ) // decrements ReferenceCounter (for static vars) and deinitializes fir struct (if possible).
+ new defs:
+ #define FIRCPWBN 10 // log2 of number of precalculated wings (-(1L<<FIRCPWBN)..(1L<<FIRCPWBN))
+ #define FIRLOPOSSHIFT (16-(FIRCPWBN+1)) // shift for lopos of sampleposition -> (16 - FIRCPWBN - 1)
+ #define FIRLEN 9 // number(-1) of multiplications per sample
+ #define FIRCUT 0.90f // cutoff of filter
+ #define MIXNDX_FIRMIXERSRC 0x20 // src-type for firfilter
+ new vars:
+ static signed short *cFirLut; // lulines
+ static int bFirInitialized = 0; // initialized?
+ static int nFirOrder = FIRLEN; // order (modplug has 4smps pre/post extension, so limit this to 9)
+ static float nFirFC = FIRCUT; // cutoff (normalized to pi/2)
+ static int nFirCpw = (1L<<FIRCPWBN); // number of precalculted filter lines
+ static int nFirUsers = 0; // reference counter
+ new macros:
+ #define SNDMIX_GETMONOVOL8FIRFILTER
+ #define SNDMIX_GETMONOVOL16FIRFILTER
+ #define SNDMIX_GETSTEREOVOL8FIRFILTER
+ #define SNDMIX_GETSTEREOVOL16FIRFILTER
+ new mixer interface macros:
+ BEGIN_MIX_INTERFACE(Mono8BitFirFilterMix)
+ BEGIN_MIX_INTERFACE(Mono16BitFirFilterMix)
+ BEGIN_RAMPMIX_INTERFACE(Mono8BitFirFilterRampMix)
+ BEGIN_RAMPMIX_INTERFACE(Mono16BitFirFilterRampMix)
+ BEGIN_MIX_INTERFACE(FastMono8BitFirFilterMix)
+ BEGIN_MIX_INTERFACE(FastMono16BitFirFilterMix)
+ BEGIN_FASTRAMPMIX_INTERFACE(FastMono8BitFirFilterRampMix)
+ BEGIN_FASTRAMPMIX_INTERFACE(FastMono16BitFirFilterRampMix)
+ BEGIN_MIX_INTERFACE(Stereo8BitFirFilterMix)
+ BEGIN_MIX_INTERFACE(Stereo16BitFirFilterMix)
+ BEGIN_RAMPMIX_INTERFACE(Stereo8BitFirFilterRampMix)
+ BEGIN_RAMPMIX_INTERFACE(Stereo16BitFirFilterRampMix)
+ BEGIN_MIX_FLT_INTERFACE(FilterMono8BitFirFilterMix)
+ BEGIN_MIX_FLT_INTERFACE(FilterMono16BitFirFilterMix)
+ BEGIN_RAMPMIX_FLT_INTERFACE(FilterMono8BitFirFilterRampMix)
+ BEGIN_RAMPMIX_FLT_INTERFACE(FilterMono16BitFirFilterRampMix)
+ BEGIN_MIX_STFLT_INTERFACE(FilterStereo8BitFirFilterMix)
+ BEGIN_MIX_STFLT_INTERFACE(FilterStereo16BitFirFilterMix)
+ BEGIN_RAMPMIX_STFLT_INTERFACE(FilterStereo8BitFirFilterRampMix)
+ BEGIN_RAMPMIX_STFLT_INTERFACE(FilterStereo16BitFirFilterRampMix)
+ modified:
+ const LPMIXINTERFACE gpMixFunctionTable[2*2*16] // to hold new fir mixer interface
+ const LPMIXINTERFACE gpFastMixFunctionTable[2*2*16] // to hold new fir mixer interface
+ functioN: UINT CSoundFile::CreateStereoMix(int count)
+ new:
+ if (!(pChannel->dwFlags & CHN_NOIDO))
+ {
+ // use hq-fir mixer?
+ if( ((gdwSoundSetup & (SNDMIX_HQRESAMPLER|SNDMIX_ULTRAHQSRCMODE)) == (SNDMIX_HQRESAMPLER|SNDMIX_ULTRAHQSRCMODE)) ||
+ ((gdwSoundSetup & (SNDMIX_HQRESAMPLER)) == (SNDMIX_HQRESAMPLER)) )
+ nFlags += MIXNDX_FIRMIXERSRC;
+ else
+ nFlags += MIXNDX_LINEARSRC; // use
+ }
+ was:
+ if (!(pChannel->dwFlags & CHN_NOIDO))
+ {
+ nFlags += MIXNDX_LINEARSRC; // use
+ }
+
+
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