diff --git a/FLAC.dsw b/FLAC.dsw index abd76b6e..7eec19b3 100644 --- a/FLAC.dsw +++ b/FLAC.dsw @@ -27,6 +27,9 @@ Package=<4> Project_Dep_Name flac_ren End Project Dependency Begin Project Dependency + Project_Dep_Name gain_analysis + End Project Dependency + Begin Project Dependency Project_Dep_Name getopt End Project Dependency Begin Project Dependency @@ -71,6 +74,9 @@ Package=<5> Package=<4> {{{ + Begin Project Dependency + Project_Dep_Name gain_analysis + End Project Dependency Begin Project Dependency Project_Dep_Name getopt End Project Dependency @@ -111,6 +117,18 @@ Package=<4> ############################################################################### +Project: "gain_analysis"=.\src\share\gain_analysis\gain_analysis.dsp - Package Owner=<4> + +Package=<5> +{{{ +}}} + +Package=<4> +{{{ +}}} + +############################################################################### + Project: "getopt"=.\src\share\getopt\getopt.dsp - Package Owner=<4> Package=<5> @@ -209,6 +227,18 @@ Package=<5> Package=<4> {{{ + Begin Project Dependency + Project_Dep_Name gain_analysis + End Project Dependency + Begin Project Dependency + Project_Dep_Name getopt + End Project Dependency + Begin Project Dependency + Project_Dep_Name libFLAC + End Project Dependency + Begin Project Dependency + Project_Dep_Name utf8 + End Project Dependency }}} ############################################################################### diff --git a/Makefile.lite b/Makefile.lite index 9297f50a..8a54b93a 100644 --- a/Makefile.lite +++ b/Makefile.lite @@ -58,6 +58,7 @@ libOggFLAC++: libFLAC (cd src/$@ ; $(MAKE) -f Makefile.lite $(CONFIG)) share: + (cd src/$@/gain_analysis ; $(MAKE) -f Makefile.lite $(CONFIG)) (cd src/$@/getopt ; $(MAKE) -f Makefile.lite $(CONFIG)) (cd src/$@/utf8 ; $(MAKE) -f Makefile.lite $(CONFIG)) @@ -97,6 +98,7 @@ clean: -(cd src/libFLAC++ ; $(MAKE) -f Makefile.lite clean) -(cd src/libOggFLAC ; $(MAKE) -f Makefile.lite clean) -(cd src/libOggFLAC++ ; $(MAKE) -f Makefile.lite clean) + -(cd src/share/gain_analysis ; $(MAKE) -f Makefile.lite clean) -(cd src/share/getopt ; $(MAKE) -f Makefile.lite clean) -(cd src/share/utf8 ; $(MAKE) -f Makefile.lite clean) -(cd src/flac ; $(MAKE) -f Makefile.lite clean) diff --git a/include/share/Makefile.am b/include/share/Makefile.am index d2e21770..e01f08d5 100644 --- a/include/share/Makefile.am +++ b/include/share/Makefile.am @@ -2,4 +2,7 @@ AUTOMAKE_OPTIONS = foreign -EXTRA_DIST = utf8.h getopt.h +EXTRA_DIST = \ + gain_analysis.h \ + getopt.h \ + utf8.h diff --git a/src/flac/Makefile.lite b/src/flac/Makefile.lite index c36cb2f8..341ee1cd 100644 --- a/src/flac/Makefile.lite +++ b/src/flac/Makefile.lite @@ -24,16 +24,16 @@ topdir = ../.. PROGRAM_NAME = flac ifeq ($(DARWIN_BUILD),yes) INCLUDES = -I./include -I$(topdir)/include -LIBS = -lFLAC -lgetopt -lutf8 -lc -lm +LIBS = -lFLAC -lgain_analysis -lgetopt -lutf8 -lc -lm else #@@@ TODO: conditionalize ogg includes, defines, and -logg ifeq ($(SOLARIS_BUILD),yes) INCLUDES = -I./include -I$(topdir)/include -I$(HOME)/local/include -DFLAC__HAS_OGG -LIBS = -lOggFLAC -lFLAC -lgetopt -lutf8 -lm -L$(HOME)/local/lib -logg +LIBS = -lOggFLAC -lFLAC -lgain_analysis -lgetopt -lutf8 -lm -L$(HOME)/local/lib -logg else #@@@ TODO: conditionalize ogg includes, defines, and -logg INCLUDES = -I./include -I$(topdir)/include -I$(HOME)/local/include -DFLAC__HAS_OGG -LIBS = -lOggFLAC -lFLAC -lgetopt -lutf8 -lm -L$(HOME)/local/lib -logg +LIBS = -lOggFLAC -lFLAC -lgain_analysis -lgetopt -lutf8 -lm -L$(HOME)/local/lib -logg endif endif diff --git a/src/flac/Makefile.vc b/src/flac/Makefile.vc index cf313ed3..2deadcfb 100644 --- a/src/flac/Makefile.vc +++ b/src/flac/Makefile.vc @@ -40,7 +40,7 @@ OBJS= $(C_FILES:.c=.obj) all: flac.exe flac.exe: $(OBJS) - link.exe /libpath:"..\..\obj\lib" -out:../../obj/bin/$*.exe $(OBJS) libOggFLAC.lib libFLAC.lib ogg_static.lib getopt.lib utf8.lib + link.exe /libpath:"..\..\obj\lib" -out:../../obj/bin/$*.exe $(OBJS) libOggFLAC.lib libFLAC.lib ogg_static.lib gain_analysis.lib getopt.lib utf8.lib clean: -del *.obj *.pch diff --git a/src/metaflac/Makefile.lite b/src/metaflac/Makefile.lite index f6e5393e..0d897ca3 100644 --- a/src/metaflac/Makefile.lite +++ b/src/metaflac/Makefile.lite @@ -23,7 +23,7 @@ topdir = ../.. PROGRAM_NAME = metaflac INCLUDES = -I./include -I$(topdir)/include -LIBS = -lFLAC -lgetopt -lutf8 -lm +LIBS = -lFLAC -lgain_analysis -lgetopt -lutf8 -lm OBJS = \ main.o diff --git a/src/metaflac/Makefile.vc b/src/metaflac/Makefile.vc index 6f1e3a2c..252d5667 100644 --- a/src/metaflac/Makefile.vc +++ b/src/metaflac/Makefile.vc @@ -33,7 +33,7 @@ OBJS= $(C_FILES:.c=.obj) all: metaflac.exe metaflac.exe: $(OBJS) - link.exe /libpath:"..\..\obj\lib" -out:../../obj/bin/$*.exe $(OBJS) libFLAC.lib getopt.lib utf8.lib + link.exe /libpath:"..\..\obj\lib" -out:../../obj/bin/$*.exe $(OBJS) libFLAC.lib gain_analysis.lib getopt.lib utf8.lib clean: -del *.obj *.pch diff --git a/src/share/Makefile.am b/src/share/Makefile.am index 79646376..b467a62f 100644 --- a/src/share/Makefile.am +++ b/src/share/Makefile.am @@ -15,7 +15,7 @@ # along with this program; if not, write to the Free Software # Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA. -SUBDIRS = getopt utf8 +SUBDIRS = gain_analysis getopt utf8 EXTRA_DIST = \ Makefile.vc \ diff --git a/src/share/Makefile.vc b/src/share/Makefile.vc index d6979209..46c2f79a 100644 --- a/src/share/Makefile.vc +++ b/src/share/Makefile.vc @@ -3,6 +3,9 @@ # It's less hassle to spell it all out that to figure out how to do it right with nmake: all: + cd gain_analysis + nmake /f Makefile.vc + cd .. cd getopt nmake /f Makefile.vc cd .. @@ -11,6 +14,9 @@ all: cd .. clean: + cd gain_analysis + nmake /f Makefile.vc clean + cd .. cd getopt nmake /f Makefile.vc clean cd .. diff --git a/src/share/gain_analysis/Makefile.am b/src/share/gain_analysis/Makefile.am new file mode 100644 index 00000000..06ae052b --- /dev/null +++ b/src/share/gain_analysis/Makefile.am @@ -0,0 +1,20 @@ +## Process this file with automake to produce Makefile.in + +AUTOMAKE_OPTIONS = foreign + +INCLUDES = -I$(top_srcdir)/include/share + +noinst_LIBRARIES = libgain_analysis.a + +libgain_analysis_a_SOURCES = gain_analysis.c + +EXTRA_DIST = \ + Makefile.lite \ + Makefile.vc \ + gain_analysis.dsp + +debug: + $(MAKE) all CFLAGS="@DEBUG@" + +profile: + $(MAKE) all CFLAGS="@PROFILE@" diff --git a/src/share/gain_analysis/Makefile.lite b/src/share/gain_analysis/Makefile.lite new file mode 100644 index 00000000..c4ef2728 --- /dev/null +++ b/src/share/gain_analysis/Makefile.lite @@ -0,0 +1,15 @@ +# +# GNU makefile +# + +topdir = ../../.. + +LIB_NAME = libgain_analysis +INCLUDES = -I$(topdir)/include/share + +OBJS = \ + gain_analysis.o + +include $(topdir)/build/lib.mk + +# DO NOT DELETE THIS LINE -- make depend depends on it. diff --git a/src/share/gain_analysis/Makefile.vc b/src/share/gain_analysis/Makefile.vc new file mode 100644 index 00000000..6e79aaf5 --- /dev/null +++ b/src/share/gain_analysis/Makefile.vc @@ -0,0 +1,23 @@ +!include + +!IFDEF DEBUG +.c.obj: + $(cc) /D "_LIB" -DFLAC__NO_DLL /GX $(cdebug) $(cflags) /I "..\..\..\include" /I "..\..\..\include\share" -DSTRICT -YX /Od /D "_DEBUG" $< +!else +.c.obj: + $(cc) /D "_LIB" -DFLAC__NO_DLL /O2 $(crelease) $(cflags) /I "..\..\..\include" /I "..\..\..\include\share" -DSTRICT -YX -DNODEBUG $< +!endif + +C_FILES= \ + gain_analysis.c \ + +OBJS= $(C_FILES:.c=.obj) + +all: gain_analysis.lib + +gain_analysis.lib: $(OBJS) + link.exe -lib /nodefaultlib -out:../../../obj/lib/$*.lib $(OBJS) + +clean: + -del *.obj *.pch + -del ..\..\..\obj\lib\gain_analysis.lib ..\..\..\obj\lib\gain_analysis.pdb diff --git a/src/share/gain_analysis/gain_analysis.c b/src/share/gain_analysis/gain_analysis.c new file mode 100644 index 00000000..10229b84 --- /dev/null +++ b/src/share/gain_analysis/gain_analysis.c @@ -0,0 +1,413 @@ +/* + * ReplayGainAnalysis - analyzes input samples and give the recommended dB change + * Copyright (C) 2001 David Robinson and Glen Sawyer + * + * This library is free software; you can redistribute it and/or + * modify it under the terms of the GNU Lesser General Public + * License as published by the Free Software Foundation; either + * version 2.1 of the License, or (at your option) any later version. + * + * This library is distributed in the hope that it will be useful, + * but WITHOUT ANY WARRANTY; without even the implied warranty of + * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU + * Lesser General Public License for more details. + * + * You should have received a copy of the GNU Lesser General Public + * License along with this library; if not, write to the Free Software + * Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA + * + * concept and filter values by David Robinson (David@Robinson.org) + * -- blame him if you think the idea is flawed + * original coding by Glen Sawyer (glensawyer@hotmail.com) + * -- blame him if you think this runs too slowly, or the coding is otherwise flawed + * + * lots of code improvements by Frank Klemm ( http://www.uni-jena.de/~pfk/mpp/ ) + * -- credit him for all the _good_ programming ;) + * + * minor cosmetic tweaks to integrate with FLAC by Josh Coalson + * + * + * For an explanation of the concepts and the basic algorithms involved, go to: + * http://www.replaygain.org/ + */ + +/* + * Here's the deal. Call + * + * InitGainAnalysis ( long samplefreq ); + * + * to initialize everything. Call + * + * AnalyzeSamples ( const Float_t* left_samples, + * const Float_t* right_samples, + * size_t num_samples, + * int num_channels ); + * + * as many times as you want, with as many or as few samples as you want. + * If mono, pass the sample buffer in through left_samples, leave + * right_samples NULL, and make sure num_channels = 1. + * + * GetTitleGain() + * + * will return the recommended dB level change for all samples analyzed + * SINCE THE LAST TIME you called GetTitleGain() OR InitGainAnalysis(). + * + * GetAlbumGain() + * + * will return the recommended dB level change for all samples analyzed + * since InitGainAnalysis() was called and finalized with GetTitleGain(). + * + * Pseudo-code to process an album: + * + * Float_t l_samples [4096]; + * Float_t r_samples [4096]; + * size_t num_samples; + * unsigned int num_songs; + * unsigned int i; + * + * InitGainAnalysis ( 44100 ); + * for ( i = 1; i <= num_songs; i++ ) { + * while ( ( num_samples = getSongSamples ( song[i], left_samples, right_samples ) ) > 0 ) + * AnalyzeSamples ( left_samples, right_samples, num_samples, 2 ); + * fprintf ("Recommended dB change for song %2d: %+6.2f dB\n", i, GetTitleGain() ); + * } + * fprintf ("Recommended dB change for whole album: %+6.2f dB\n", GetAlbumGain() ); + */ + +/* + * So here's the main source of potential code confusion: + * + * The filters applied to the incoming samples are IIR filters, + * meaning they rely on up to number of previous samples + * AND up to number of previous filtered samples. + * + * I set up the AnalyzeSamples routine to minimize memory usage and interface + * complexity. The speed isn't compromised too much (I don't think), but the + * internal complexity is higher than it should be for such a relatively + * simple routine. + * + * Optimization/clarity suggestions are welcome. + */ + +#include +#include +#include +#include + +#include "gain_analysis.h" + +typedef unsigned short Uint16_t; +typedef signed short Int16_t; +typedef unsigned int Uint32_t; +typedef signed int Int32_t; + +#define YULE_ORDER 10 +#define BUTTER_ORDER 2 +#define RMS_PERCENTILE 0.95 /* percentile which is louder than the proposed level */ +#define MAX_SAMP_FREQ 48000. /* maximum allowed sample frequency [Hz] */ +#define RMS_WINDOW_TIME 0.050 /* Time slice size [s] */ +#define STEPS_per_dB 100. /* Table entries per dB */ +#define MAX_dB 120. /* Table entries for 0...MAX_dB (normal max. values are 70...80 dB) */ + +#define MAX_ORDER (BUTTER_ORDER > YULE_ORDER ? BUTTER_ORDER : YULE_ORDER) +#define MAX_SAMPLES_PER_WINDOW (size_t) (MAX_SAMP_FREQ * RMS_WINDOW_TIME) /* max. Samples per Time slice */ +#define PINK_REF 64.82 /* 298640883795 */ /* calibration value */ + +Float_t linprebuf [MAX_ORDER * 2]; +Float_t* linpre; /* left input samples, with pre-buffer */ +Float_t lstepbuf [MAX_SAMPLES_PER_WINDOW + MAX_ORDER]; +Float_t* lstep; /* left "first step" (i.e. post first filter) samples */ +Float_t loutbuf [MAX_SAMPLES_PER_WINDOW + MAX_ORDER]; +Float_t* lout; /* left "out" (i.e. post second filter) samples */ +Float_t rinprebuf [MAX_ORDER * 2]; +Float_t* rinpre; /* right input samples ... */ +Float_t rstepbuf [MAX_SAMPLES_PER_WINDOW + MAX_ORDER]; +Float_t* rstep; +Float_t routbuf [MAX_SAMPLES_PER_WINDOW + MAX_ORDER]; +Float_t* rout; +unsigned int sampleWindow; /* number of samples required to reach number of milliseconds required for RMS window */ +unsigned long totsamp; +double lsum; +double rsum; +int freqindex; +int first; +static Uint32_t A [(size_t)(STEPS_per_dB * MAX_dB)]; +static Uint32_t B [(size_t)(STEPS_per_dB * MAX_dB)]; + +/* for each filter: + [0] 48 kHz, [1] 44.1 kHz, [2] 32 kHz, [3] 24 kHz, [4] 22050 Hz, [5] 16 kHz, [6] 12 kHz, [7] is 11025 Hz, [8] 8 kHz */ + +#ifdef WIN32 +#pragma warning ( disable : 4305 ) +#endif + +const Float_t AYule [9] [11] = { + { 1., -3.84664617118067, 7.81501653005538,-11.34170355132042, 13.05504219327545,-12.28759895145294, 9.48293806319790, -5.87257861775999, 2.75465861874613, -0.86984376593551, 0.13919314567432 }, + { 1., -3.47845948550071, 6.36317777566148, -8.54751527471874, 9.47693607801280, -8.81498681370155, 6.85401540936998, -4.39470996079559, 2.19611684890774, -0.75104302451432, 0.13149317958808 }, + { 1., -2.37898834973084, 2.84868151156327, -2.64577170229825, 2.23697657451713, -1.67148153367602, 1.00595954808547, -0.45953458054983, 0.16378164858596, -0.05032077717131, 0.02347897407020 }, + { 1., -1.61273165137247, 1.07977492259970, -0.25656257754070, -0.16276719120440, -0.22638893773906, 0.39120800788284, -0.22138138954925, 0.04500235387352, 0.02005851806501, 0.00302439095741 }, + { 1., -1.49858979367799, 0.87350271418188, 0.12205022308084, -0.80774944671438, 0.47854794562326, -0.12453458140019, -0.04067510197014, 0.08333755284107, -0.04237348025746, 0.02977207319925 }, + { 1., -0.62820619233671, 0.29661783706366, -0.37256372942400, 0.00213767857124, -0.42029820170918, 0.22199650564824, 0.00613424350682, 0.06747620744683, 0.05784820375801, 0.03222754072173 }, + { 1., -1.04800335126349, 0.29156311971249, -0.26806001042947, 0.00819999645858, 0.45054734505008, -0.33032403314006, 0.06739368333110, -0.04784254229033, 0.01639907836189, 0.01807364323573 }, + { 1., -0.51035327095184, -0.31863563325245, -0.20256413484477, 0.14728154134330, 0.38952639978999, -0.23313271880868, -0.05246019024463, -0.02505961724053, 0.02442357316099, 0.01818801111503 }, + { 1., -0.25049871956020, -0.43193942311114, -0.03424681017675, -0.04678328784242, 0.26408300200955, 0.15113130533216, -0.17556493366449, -0.18823009262115, 0.05477720428674, 0.04704409688120 } +}; + +const Float_t BYule [9] [11] = { + { 0.03857599435200, -0.02160367184185, -0.00123395316851, -0.00009291677959, -0.01655260341619, 0.02161526843274, -0.02074045215285, 0.00594298065125, 0.00306428023191, 0.00012025322027, 0.00288463683916 }, + { 0.05418656406430, -0.02911007808948, -0.00848709379851, -0.00851165645469, -0.00834990904936, 0.02245293253339, -0.02596338512915, 0.01624864962975, -0.00240879051584, 0.00674613682247, -0.00187763777362 }, + { 0.15457299681924, -0.09331049056315, -0.06247880153653, 0.02163541888798, -0.05588393329856, 0.04781476674921, 0.00222312597743, 0.03174092540049, -0.01390589421898, 0.00651420667831, -0.00881362733839 }, + { 0.30296907319327, -0.22613988682123, -0.08587323730772, 0.03282930172664, -0.00915702933434, -0.02364141202522, -0.00584456039913, 0.06276101321749, -0.00000828086748, 0.00205861885564, -0.02950134983287 }, + { 0.33642304856132, -0.25572241425570, -0.11828570177555, 0.11921148675203, -0.07834489609479, -0.00469977914380, -0.00589500224440, 0.05724228140351, 0.00832043980773, -0.01635381384540, -0.01760176568150 }, + { 0.44915256608450, -0.14351757464547, -0.22784394429749, -0.01419140100551, 0.04078262797139, -0.12398163381748, 0.04097565135648, 0.10478503600251, -0.01863887810927, -0.03193428438915, 0.00541907748707 }, + { 0.56619470757641, -0.75464456939302, 0.16242137742230, 0.16744243493672, -0.18901604199609, 0.30931782841830, -0.27562961986224, 0.00647310677246, 0.08647503780351, -0.03788984554840, -0.00588215443421 }, + { 0.58100494960553, -0.53174909058578, -0.14289799034253, 0.17520704835522, 0.02377945217615, 0.15558449135573, -0.25344790059353, 0.01628462406333, 0.06920467763959, -0.03721611395801, -0.00749618797172 }, + { 0.53648789255105, -0.42163034350696, -0.00275953611929, 0.04267842219415, -0.10214864179676, 0.14590772289388, -0.02459864859345, -0.11202315195388, -0.04060034127000, 0.04788665548180, -0.02217936801134 } +}; + +const Float_t AButter [9] [3] = { + { 1., -1.97223372919527, 0.97261396931306 }, + { 1., -1.96977855582618, 0.97022847566350 }, + { 1., -1.95835380975398, 0.95920349965459 }, + { 1., -1.95002759149878, 0.95124613669835 }, + { 1., -1.94561023566527, 0.94705070426118 }, + { 1., -1.92783286977036, 0.93034775234268 }, + { 1., -1.91858953033784, 0.92177618768381 }, + { 1., -1.91542108074780, 0.91885558323625 }, + { 1., -1.88903307939452, 0.89487434461664 } +}; + +const Float_t BButter [9] [3] = { + { 0.98621192462708, -1.97242384925416, 0.98621192462708 }, + { 0.98500175787242, -1.97000351574484, 0.98500175787242 }, + { 0.97938932735214, -1.95877865470428, 0.97938932735214 }, + { 0.97531843204928, -1.95063686409857, 0.97531843204928 }, + { 0.97316523498161, -1.94633046996323, 0.97316523498161 }, + { 0.96454515552826, -1.92909031105652, 0.96454515552826 }, + { 0.96009142950541, -1.92018285901082, 0.96009142950541 }, + { 0.95856916599601, -1.91713833199203, 0.95856916599601 }, + { 0.94597685600279, -1.89195371200558, 0.94597685600279 } +}; + +#ifdef WIN32 +#pragma warning ( default : 4305 ) +#endif + +/* When calling this procedure, make sure that ip[-order] and op[-order] point to real data! */ + +static void +filter ( const Float_t* input, Float_t* output, size_t nSamples, const Float_t* a, const Float_t* b, size_t order ) +{ + double y; + size_t i; + size_t k; + + for ( i = 0; i < nSamples; i++ ) { + y = input[i] * b[0]; + for ( k = 1; k <= order; k++ ) + y += input[i-k] * b[k] - output[i-k] * a[k]; + output[i] = (Float_t)y; + } +} + +/* returns a INIT_GAIN_ANALYSIS_OK if successful, INIT_GAIN_ANALYSIS_ERROR if not */ + +GAIN_ANALYSIS_API +int +ResetSampleFrequency ( long samplefreq ) { + int i; + + /* zero out initial values */ + for ( i = 0; i < MAX_ORDER; i++ ) + linprebuf[i] = lstepbuf[i] = loutbuf[i] = rinprebuf[i] = rstepbuf[i] = routbuf[i] = 0.; + + switch ( (int)(samplefreq) ) { + case 48000: freqindex = 0; break; + case 44100: freqindex = 1; break; + case 32000: freqindex = 2; break; + case 24000: freqindex = 3; break; + case 22050: freqindex = 4; break; + case 16000: freqindex = 5; break; + case 12000: freqindex = 6; break; + case 11025: freqindex = 7; break; + case 8000: freqindex = 8; break; + default: return INIT_GAIN_ANALYSIS_ERROR; + } + + sampleWindow = (int) ceil (samplefreq * RMS_WINDOW_TIME); + + lsum = 0.; + rsum = 0.; + totsamp = 0; + + memset ( A, 0, sizeof(A) ); + + return INIT_GAIN_ANALYSIS_OK; +} + +GAIN_ANALYSIS_API +int +InitGainAnalysis ( long samplefreq ) +{ + if (ResetSampleFrequency(samplefreq) != INIT_GAIN_ANALYSIS_OK) { + return INIT_GAIN_ANALYSIS_ERROR; + } + + linpre = linprebuf + MAX_ORDER; + rinpre = rinprebuf + MAX_ORDER; + lstep = lstepbuf + MAX_ORDER; + rstep = rstepbuf + MAX_ORDER; + lout = loutbuf + MAX_ORDER; + rout = routbuf + MAX_ORDER; + + memset ( B, 0, sizeof(B) ); + + return INIT_GAIN_ANALYSIS_OK; +} + +/* returns GAIN_ANALYSIS_OK if successful, GAIN_ANALYSIS_ERROR if not */ + +GAIN_ANALYSIS_API +int +AnalyzeSamples ( const Float_t* left_samples, const Float_t* right_samples, size_t num_samples, int num_channels ) +{ + const Float_t* curleft; + const Float_t* curright; + long batchsamples; + long cursamples; + long cursamplepos; + int i; + + if ( num_samples == 0 ) + return GAIN_ANALYSIS_OK; + + cursamplepos = 0; + batchsamples = num_samples; + + switch ( num_channels) { + case 1: right_samples = left_samples; + case 2: break; + default: return GAIN_ANALYSIS_ERROR; + } + + if ( num_samples < MAX_ORDER ) { + memcpy ( linprebuf + MAX_ORDER, left_samples , num_samples * sizeof(Float_t) ); + memcpy ( rinprebuf + MAX_ORDER, right_samples, num_samples * sizeof(Float_t) ); + } + else { + memcpy ( linprebuf + MAX_ORDER, left_samples, MAX_ORDER * sizeof(Float_t) ); + memcpy ( rinprebuf + MAX_ORDER, right_samples, MAX_ORDER * sizeof(Float_t) ); + } + + while ( batchsamples > 0 ) { + cursamples = batchsamples > (long)(sampleWindow-totsamp) ? (long)(sampleWindow - totsamp) : batchsamples; + if ( cursamplepos < MAX_ORDER ) { + curleft = linpre+cursamplepos; + curright = rinpre+cursamplepos; + if (cursamples > MAX_ORDER - cursamplepos ) + cursamples = MAX_ORDER - cursamplepos; + } + else { + curleft = left_samples + cursamplepos; + curright = right_samples + cursamplepos; + } + + filter ( curleft , lstep + totsamp, cursamples, AYule[freqindex], BYule[freqindex], YULE_ORDER ); + filter ( curright, rstep + totsamp, cursamples, AYule[freqindex], BYule[freqindex], YULE_ORDER ); + + filter ( lstep + totsamp, lout + totsamp, cursamples, AButter[freqindex], BButter[freqindex], BUTTER_ORDER ); + filter ( rstep + totsamp, rout + totsamp, cursamples, AButter[freqindex], BButter[freqindex], BUTTER_ORDER ); + + for ( i = 0; i < cursamples; i++ ) { /* Get the squared values */ + lsum += lout [totsamp+i] * lout [totsamp+i]; + rsum += rout [totsamp+i] * rout [totsamp+i]; + } + + batchsamples -= cursamples; + cursamplepos += cursamples; + totsamp += cursamples; + if ( totsamp == sampleWindow ) { /* Get the Root Mean Square (RMS) for this set of samples */ + double val = STEPS_per_dB * 10. * log10 ( (lsum+rsum) / totsamp * 0.5 + 1.e-37 ); + int ival = (int) val; + if ( ival < 0 ) ival = 0; + if ( ival >= (int)(sizeof(A)/sizeof(*A)) ) ival = (int)(sizeof(A)/sizeof(*A)) - 1; + A [ival]++; + lsum = rsum = 0.; + memmove ( loutbuf , loutbuf + totsamp, MAX_ORDER * sizeof(Float_t) ); + memmove ( routbuf , routbuf + totsamp, MAX_ORDER * sizeof(Float_t) ); + memmove ( lstepbuf, lstepbuf + totsamp, MAX_ORDER * sizeof(Float_t) ); + memmove ( rstepbuf, rstepbuf + totsamp, MAX_ORDER * sizeof(Float_t) ); + totsamp = 0; + } + if ( totsamp > sampleWindow ) /* somehow I really screwed up: Error in programming! Contact author about totsamp > sampleWindow */ + return GAIN_ANALYSIS_ERROR; + } + if ( num_samples < MAX_ORDER ) { + memmove ( linprebuf, linprebuf + num_samples, (MAX_ORDER-num_samples) * sizeof(Float_t) ); + memmove ( rinprebuf, rinprebuf + num_samples, (MAX_ORDER-num_samples) * sizeof(Float_t) ); + memcpy ( linprebuf + MAX_ORDER - num_samples, left_samples, num_samples * sizeof(Float_t) ); + memcpy ( rinprebuf + MAX_ORDER - num_samples, right_samples, num_samples * sizeof(Float_t) ); + } + else { + memcpy ( linprebuf, left_samples + num_samples - MAX_ORDER, MAX_ORDER * sizeof(Float_t) ); + memcpy ( rinprebuf, right_samples + num_samples - MAX_ORDER, MAX_ORDER * sizeof(Float_t) ); + } + + return GAIN_ANALYSIS_OK; +} + + +static Float_t +analyzeResult ( Uint32_t* Array, size_t len ) +{ + Uint32_t elems; + Int32_t upper; + size_t i; + + elems = 0; + for ( i = 0; i < len; i++ ) + elems += Array[i]; + if ( elems == 0 ) + return GAIN_NOT_ENOUGH_SAMPLES; + + upper = (Int32_t) ceil (elems * (1. - RMS_PERCENTILE)); + for ( i = len; i-- > 0; ) { + if ( (upper -= Array[i]) <= 0 ) + break; + } + + return (Float_t) ((Float_t)PINK_REF - (Float_t)i / (Float_t)STEPS_per_dB); +} + + +GAIN_ANALYSIS_API +Float_t +GetTitleGain ( void ) +{ + Float_t retval; + unsigned int i; + + retval = analyzeResult ( A, sizeof(A)/sizeof(*A) ); + + for ( i = 0; i < sizeof(A)/sizeof(*A); i++ ) { + B[i] += A[i]; + A[i] = 0; + } + + for ( i = 0; i < MAX_ORDER; i++ ) + linprebuf[i] = lstepbuf[i] = loutbuf[i] = rinprebuf[i] = rstepbuf[i] = routbuf[i] = 0.f; + + totsamp = 0; + lsum = rsum = 0.; + return retval; +} + + +GAIN_ANALYSIS_API +Float_t +GetAlbumGain ( void ) +{ + return analyzeResult ( B, sizeof(B)/sizeof(*B) ); +} + +/* end of gain_analysis.c */ diff --git a/src/share/gain_analysis/gain_analysis.dsp b/src/share/gain_analysis/gain_analysis.dsp new file mode 100644 index 00000000..647eebac --- /dev/null +++ b/src/share/gain_analysis/gain_analysis.dsp @@ -0,0 +1,115 @@ +# Microsoft Developer Studio Project File - Name="gain_analysis" - Package Owner=<4> +# Microsoft Developer Studio Generated Build File, Format Version 6.00 +# ** DO NOT EDIT ** + +# TARGTYPE "Win32 (x86) Dynamic-Link Library" 0x0102 + +CFG=gain_analysis - Win32 Debug +!MESSAGE This is not a valid makefile. To build this project using NMAKE, +!MESSAGE use the Export Makefile command and run +!MESSAGE +!MESSAGE NMAKE /f "gain_analysis.mak". +!MESSAGE +!MESSAGE You can specify a configuration when running NMAKE +!MESSAGE by defining the macro CFG on the command line. For example: +!MESSAGE +!MESSAGE NMAKE /f "gain_analysis.mak" CFG="gain_analysis - Win32 Debug" +!MESSAGE +!MESSAGE Possible choices for configuration are: +!MESSAGE +!MESSAGE "gain_analysis - Win32 Release" (based on "Win32 (x86) Dynamic-Link Library") +!MESSAGE "gain_analysis - Win32 Debug" (based on "Win32 (x86) Dynamic-Link Library") +!MESSAGE + +# Begin Project +# PROP AllowPerConfigDependencies 0 +# PROP Scc_ProjName "gain_analysis" +# PROP Scc_LocalPath "..\..\.." +CPP=cl.exe +MTL=midl.exe +RSC=rc.exe + +!IF "$(CFG)" == "gain_analysis - Win32 Release" + +# PROP BASE Use_MFC 0 +# PROP BASE Use_Debug_Libraries 0 +# PROP BASE Output_Dir "Release" +# PROP BASE Intermediate_Dir "Release" +# PROP BASE Target_Dir "" +# PROP Use_MFC 0 +# PROP Use_Debug_Libraries 0 +# PROP Output_Dir "..\..\..\obj\lib" +# PROP Intermediate_Dir "Release" +# PROP Ignore_Export_Lib 0 +# PROP Target_Dir "" +# ADD BASE CPP /nologo /MT /W3 /GX /O2 /D "WIN32" /D "NDEBUG" /D "_WINDOWS" /YX /FD /c +# ADD CPP /nologo /MD /W3 /GR /GX /O2 /I ".\include" /I "..\..\..\include" /D "NDEBUG" /D "GETOPT_API_EXPORTS" /D "_WINDOWS" /D "_WINDLL" /D "WIN32" /D "_USRDLL" /FR /FD /c +# ADD BASE MTL /nologo /D "NDEBUG" /mktyplib203 /o "NUL" /win32 +# ADD MTL /nologo /D "NDEBUG" /mktyplib203 /o "NUL" /win32 +# ADD BASE RSC /l 0x409 /d "NDEBUG" +# ADD RSC /l 0x409 /d "NDEBUG" /d "_USRDLL" +BSC32=bscmake.exe +# ADD BASE BSC32 /nologo +# ADD BSC32 /nologo +LINK32=link.exe +# ADD BASE LINK32 kernel32.lib user32.lib gdi32.lib winspool.lib comdlg32.lib advapi32.lib shell32.lib ole32.lib oleaut32.lib uuid.lib odbc32.lib odbccp32.lib /nologo /subsystem:windows /dll /machine:I386 +# ADD LINK32 /nologo /subsystem:windows /dll /machine:I386 /out:"..\..\..\obj\bin/gain_analysis.dll" + +!ELSEIF "$(CFG)" == "gain_analysis - Win32 Debug" + +# PROP BASE Use_MFC 0 +# PROP BASE Use_Debug_Libraries 1 +# PROP BASE Output_Dir "Debug" +# PROP BASE Intermediate_Dir "Debug" +# PROP BASE Target_Dir "" +# PROP Use_MFC 0 +# PROP Use_Debug_Libraries 1 +# PROP Output_Dir "..\..\..\obj\lib" +# PROP Intermediate_Dir "Debug" +# PROP Ignore_Export_Lib 0 +# PROP Target_Dir "" +# ADD BASE CPP /nologo /MTd /W3 /Gm /GX /Zi /Od /D "WIN32" /D "_DEBUG" /D "_WINDOWS" /YX /FD /c +# ADD CPP /nologo /MDd /W3 /Gm /GR /GX /ZI /Od /I ".\include" /I "..\..\..\include" /D "_DEBUG" /D "_CHATTER" /D "GETOPT_API_EXPORTS" /D "_WINDOWS" /D "_WINDLL" /D "WIN32" /D "_USRDLL" /FR /FD /c +# ADD BASE MTL /nologo /D "_DEBUG" /mktyplib203 /o "NUL" /win32 +# ADD MTL /nologo /D "_DEBUG" /mktyplib203 /o "NUL" /win32 +# ADD BASE RSC /l 0x409 /d "_DEBUG" +# ADD RSC /l 0x409 /d "_DEBUG" /d "_USRDLL" +BSC32=bscmake.exe +# ADD BASE BSC32 /nologo +# ADD BSC32 /nologo +LINK32=link.exe +# ADD BASE LINK32 kernel32.lib user32.lib gdi32.lib winspool.lib comdlg32.lib advapi32.lib shell32.lib ole32.lib oleaut32.lib uuid.lib odbc32.lib odbccp32.lib /nologo /subsystem:windows /dll /debug /machine:I386 /pdbtype:sept +# ADD LINK32 /nologo /subsystem:windows /dll /debug /machine:I386 /out:"..\..\..\obj\bin/gain_analysis.dll" /pdbtype:sept + +!ENDIF + +# Begin Target + +# Name "gain_analysis - Win32 Release" +# Name "gain_analysis - Win32 Debug" +# Begin Group "Source Files" + +# PROP Default_Filter "cpp" +# Begin Source File + +SOURCE=.\gain_analysis.c +# End Source File +# End Group +# Begin Group "Private Header Files" + +# PROP Default_Filter "" +# End Group +# Begin Group "Protected Header Files" + +# PROP Default_Filter "" +# End Group +# Begin Group "Public Header Files" + +# PROP Default_Filter "" +# Begin Source File + +SOURCE=..\..\..\include\share\gain_analysis.h +# End Source File +# End Group +# End Target +# End Project diff --git a/src/share/gain_analysis/gain_analysis.o b/src/share/gain_analysis/gain_analysis.o new file mode 100644 index 00000000..f7ce228b Binary files /dev/null and b/src/share/gain_analysis/gain_analysis.o differ