diff options
Diffstat (limited to 'gst/modplug/libmodplug/changes.txt')
| -rw-r--r-- | gst/modplug/libmodplug/changes.txt | 159 |
1 files changed, 0 insertions, 159 deletions
diff --git a/gst/modplug/libmodplug/changes.txt b/gst/modplug/libmodplug/changes.txt deleted file mode 100644 index 340912f1..00000000 --- a/gst/modplug/libmodplug/changes.txt +++ /dev/null @@ -1,159 +0,0 @@ -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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