Merge pull request #4 from FluidSynth/master

Sync to master

src/CMakeLists.txt

@@ -360,3 +360,13 @@ else ( MACOSX_FRAMEWORK )
    install ( FILES ${public_main_HEADER} DESTINATION ${INCLUDE_INSTALL_DIR} )
 endif ( MACOSX_FRAMEWORK )
 
+# ******* Auto Generated Lookup Tables ******
+
+include(ExternalProject)
+ExternalProject_Add(gentables
+    DOWNLOAD_COMMAND ""
+    SOURCE_DIR ${CMAKE_CURRENT_SOURCE_DIR}/gentables
+    BINARY_DIR ${CMAKE_CURRENT_BINARY_DIR}/gentables
+    INSTALL_COMMAND ${CMAKE_CURRENT_BINARY_DIR}/gentables/make_tables${CMAKE_EXECUTABLE_SUFFIX} "${CMAKE_BINARY_DIR}/"
+)
+add_dependencies(libfluidsynth-OBJ gentables)

src/gentables/CMakeLists.txt

@@ -0,0 +1,27 @@
+cmake_minimum_required(VERSION 3.1)
+
+# remove $CC from the current environment and by that force cmake to look for a (working) C compiler,
+# which hopefully will be the host compiler
+unset(ENV{CC})
+
+project (gentables C)
+
+set ( CMAKE_BUILD_TYPE Debug )
+
+set(CMAKE_RUNTIME_OUTPUT_DIRECTORY ${CMAKE_BINARY_DIR})
+set(CMAKE_RUNTIME_OUTPUT_DIRECTORY_DEBUG ${CMAKE_BINARY_DIR})
+set(CMAKE_RUNTIME_OUTPUT_DIRECTORY_RELEASE ${CMAKE_BINARY_DIR})
+
+include_directories(${CMAKE_CURRENT_SOURCE_DIR}/../)
+
+# Add the executable that generates the table
+add_executable( make_tables
+                make_tables.c
+                gen_conv.c
+                gen_rvoice_dsp.c)
+
+if ( WIN32 )
+    add_definitions ( -D_USE_MATH_DEFINES -D_CRT_SECURE_NO_WARNINGS )
+else ( WIN32 )
+    target_link_libraries (make_tables "m")
+endif ()

src/gentables/gen_conv.c

@@ -0,0 +1,81 @@
+
+#include "utils/fluid_conv_tables.h"
+#include "make_tables.h"
+
+
+/* conversion tables */
+static double fluid_ct2hz_tab[FLUID_CENTS_HZ_SIZE];
+static double fluid_cb2amp_tab[FLUID_CB_AMP_SIZE];
+static double fluid_concave_tab[FLUID_VEL_CB_SIZE];
+static double fluid_convex_tab[FLUID_VEL_CB_SIZE];
+static double fluid_pan_tab[FLUID_PAN_SIZE];
+
+/*
+ * void fluid_synth_init
+ *
+ * Does all the initialization for this module.
+ */
+static void fluid_conversion_config(void)
+{
+    int i;
+    double x;
+
+    for(i = 0; i < FLUID_CENTS_HZ_SIZE; i++)
+    {
+        fluid_ct2hz_tab[i] = pow(2.0, (double) i / 1200.0);
+    }
+
+    /* centibels to amplitude conversion
+     * Note: SF2.01 section 8.1.3: Initial attenuation range is
+     * between 0 and 144 dB. Therefore a negative attenuation is
+     * not allowed.
+     */
+    for(i = 0; i < FLUID_CB_AMP_SIZE; i++)
+    {
+        fluid_cb2amp_tab[i] = pow(10.0, (double) i / -200.0);
+    }
+
+    /* initialize the conversion tables (see fluid_mod.c
+       fluid_mod_get_value cases 4 and 8) */
+
+    /* concave unipolar positive transform curve */
+    fluid_concave_tab[0] = 0.0;
+    fluid_concave_tab[FLUID_VEL_CB_SIZE - 1] = 1.0;
+
+    /* convex unipolar positive transform curve */
+    fluid_convex_tab[0] = 0;
+    fluid_convex_tab[FLUID_VEL_CB_SIZE - 1] = 1.0;
+
+    /* There seems to be an error in the specs. The equations are
+       implemented according to the pictures on SF2.01 page 73. */
+
+    for(i = 1; i < FLUID_VEL_CB_SIZE - 1; i++)
+    {
+        x = (-200.0 / FLUID_PEAK_ATTENUATION) * log((double)(i * i) / ((FLUID_VEL_CB_SIZE - 1) * (FLUID_VEL_CB_SIZE - 1))) / M_LN10;
+        fluid_convex_tab[i] = (1.0 - x);
+        fluid_concave_tab[(FLUID_VEL_CB_SIZE - 1) - i] =  x;
+    }
+
+    /* initialize the pan conversion table */
+    x = M_PI / 2.0 / (FLUID_PAN_SIZE - 1.0);
+
+    for(i = 0; i < FLUID_PAN_SIZE; i++)
+    {
+        fluid_pan_tab[i] = sin(i * x);
+    }
+}
+
+
+void gen_conv_table(FILE *fp)
+{
+    /* Calculate the values */
+    fluid_conversion_config();
+
+    /* fluid_ct2hz_tab */
+    EMIT_ARRAY(fp, fluid_ct2hz_tab);
+    EMIT_ARRAY(fp, fluid_cb2amp_tab);
+    EMIT_ARRAY(fp, fluid_concave_tab);
+    EMIT_ARRAY(fp, fluid_convex_tab);
+    EMIT_ARRAY(fp, fluid_pan_tab);
+}
+

src/gentables/gen_rvoice_dsp.c

@@ -0,0 +1,81 @@
+
+#include "rvoice/fluid_rvoice_dsp_tables.h"
+#include "make_tables.h"
+
+/* Linear interpolation table (2 coefficients centered on 1st) */
+static double interp_coeff_linear[FLUID_INTERP_MAX][2];
+
+/* 4th order (cubic) interpolation table (4 coefficients centered on 2nd) */
+static double interp_coeff[FLUID_INTERP_MAX][4];
+
+/* 7th order interpolation (7 coefficients centered on 3rd) */
+static double sinc_table7[FLUID_INTERP_MAX][SINC_INTERP_ORDER];
+
+static double cb_interp_coeff_linear(int y, int x) { return interp_coeff_linear[y][x]; }
+static double cb_interp_coeff       (int y, int x) { return interp_coeff[y][x]; }
+static double cb_sinc_table7        (int y, int x) { return sinc_table7[y][x]; }
+
+/* Initializes interpolation tables */
+void fluid_rvoice_dsp_config(void)
+{
+    int i, i2;
+    double x, v;
+    double i_shifted;
+
+    /* Initialize the coefficients for the interpolation. The math comes
+     * from a mail, posted by Olli Niemitalo to the music-dsp mailing
+     * list (I found it in the music-dsp archives
+     * http://www.smartelectronix.com/musicdsp/).  */
+
+    for(i = 0; i < FLUID_INTERP_MAX; i++)
+    {
+        x = (double) i / (double) FLUID_INTERP_MAX;
+
+        interp_coeff[i][0] = (x * (-0.5 + x * (1 - 0.5 * x)));
+        interp_coeff[i][1] = (1.0 + x * x * (1.5 * x - 2.5));
+        interp_coeff[i][2] = (x * (0.5 + x * (2.0 - 1.5 * x)));
+        interp_coeff[i][3] = (0.5 * x * x * (x - 1.0));
+
+        interp_coeff_linear[i][0] = (1.0 - x);
+        interp_coeff_linear[i][1] = x;
+    }
+
+    /* i: Offset in terms of whole samples */
+    for(i = 0; i < SINC_INTERP_ORDER; i++)
+    {
+        /* i2: Offset in terms of fractional samples ('subsamples') */
+        for(i2 = 0; i2 < FLUID_INTERP_MAX; i2++)
+        {
+            /* center on middle of table */
+            i_shifted = (double)i - ((double)SINC_INTERP_ORDER / 2.0)
+                        + (double)i2 / (double)FLUID_INTERP_MAX;
+
+            /* sinc(0) cannot be calculated straightforward (limit needed for 0/0) */
+            if(fabs(i_shifted) > 0.000001)
+            {
+                double arg = M_PI * i_shifted;
+                v = sin(arg) / (arg);
+                /* Hanning window */
+                v *= 0.5 * (1.0 + cos(2.0 * arg / (double)SINC_INTERP_ORDER));
+            }
+            else
+            {
+                v = 1.0;
+            }
+
+            sinc_table7[FLUID_INTERP_MAX - i2 - 1][i] = v;
+        }
+    }
+}
+
+
+void gen_rvoice_table_dsp (FILE *fp)
+{
+    /* Calculate the values */
+    fluid_rvoice_dsp_config();
+
+    /* Emit the matrices */
+    emit_matrix(fp, "interp_coeff_linear", cb_interp_coeff_linear, FLUID_INTERP_MAX, 2);
+    emit_matrix(fp, "interp_coeff",        cb_interp_coeff,        FLUID_INTERP_MAX, 4);
+    emit_matrix(fp, "sinc_table7",         cb_sinc_table7,         FLUID_INTERP_MAX, 7);
+}

src/gentables/make_tables.c

@@ -0,0 +1,84 @@
+
+#include "make_tables.h"
+
+static void write_value(FILE *fp, double val, int i)
+{
+    fprintf(fp, "    %.15e%c    /* %d */\n",
+        val,
+        ',',
+        i
+           );
+}
+
+/* Emit an array of real numbers */
+void emit_array(FILE *fp, const char *tblname, const double *tbl, int size)
+{
+    int i;
+
+    fprintf(fp, "static const fluid_real_t %s[%d] = {\n", tblname, size);
+
+    for (i = 0; i < size; i++)
+    {
+        write_value(fp, tbl[i], i);
+    }
+    fprintf(fp, "};\n\n");
+}
+
+/* Emit a matrix of real numbers */
+void emit_matrix(FILE *fp, const char *tblname, emit_matrix_cb tbl_cb, int sizeh, int sizel)
+{
+    int i, j;
+
+    fprintf(fp, "static const fluid_real_t %s[%d][%d] = {\n    {\n", tblname, sizeh, sizel);
+
+    for (i = 0; i < sizeh; i++)
+    {
+        for (j = 0; j < sizel; j++)
+        {
+            write_value(fp, tbl_cb(i, j), i*sizel+j);
+        }
+
+
+        if (i < (sizeh-1))
+            fprintf(fp, "    }, {\n");
+        else
+            fprintf(fp, "    }\n};\n\n");
+    }
+}
+
+static void open_table(FILE**fp, const char* dir, const char* file)
+{
+    char buf[2048] = {0};
+    
+    strcat(buf, dir);
+    strcat(buf, file);
+
+    /* open the output file */
+    *fp = fopen(buf, "w");
+    if (*fp == NULL)
+    {
+        exit(-2);
+    }
+    
+    /* Emit warning header */
+    fprintf(*fp, "/* THIS FILE HAS BEEN AUTOMATICALLY GENERATED. DO NOT EDIT. */\n\n");
+}
+
+int main (int argc, char *argv[])
+{
+    FILE *fp;
+ 
+    // make sure we have enough arguments
+    if (argc < 2)
+        return -1;
+    
+    open_table(&fp, argv[1], "fluid_conv_tables.c");
+    gen_conv_table(fp);
+    fclose(fp);
+
+    open_table(&fp, argv[1], "fluid_rvoice_dsp_tables.c");
+    gen_rvoice_table_dsp(fp);
+    fclose(fp);
+
+    return 0;
+}

src/gentables/make_tables.h

@@ -0,0 +1,21 @@
+#include <stdio.h>
+#include <stdlib.h>
+#include <math.h>
+#include <string.h>
+
+
+#define EMIT_ARRAY(__fp__, __arr__) emit_array(__fp__, #__arr__, __arr__, sizeof(__arr__)/sizeof(*__arr__))
+
+/* callback for general access to matrices */
+typedef double (*emit_matrix_cb)(int y, int x);
+
+/* Generators */
+void gen_rvoice_table_dsp(FILE *fp);
+void gen_conv_table(FILE *fp);
+
+/* Emit an array of real numbers */
+void emit_array(FILE *fp, const char *tblname, const double *tbl, int size);
+
+/* Emit a matrix of real numbers */
+void emit_matrix(FILE *fp, const char *tblname, emit_matrix_cb tbl_cb, int sizeh, int sizel);
+

src/midi/fluid_midi.c

@@ -2225,7 +2225,7 @@ int fluid_player_get_total_ticks(fluid_player_t *player)
  */
 int fluid_player_get_bpm(fluid_player_t *player)
 {
-    return (int)(60e6 / player->miditempo);
+    return 60000000L / player->miditempo;
 }
 
 /**

src/rvoice/fluid_phase.h

@@ -22,8 +22,6 @@
 #ifndef _FLUID_PHASE_H
 #define _FLUID_PHASE_H
 
-#include "config.h"
-
 /*
  *  phase
  */
@@ -31,7 +29,7 @@
 #define FLUID_INTERP_BITS        8
 #define FLUID_INTERP_BITS_MASK   0xff000000
 #define FLUID_INTERP_BITS_SHIFT  24
-#define FLUID_INTERP_MAX         256
+
 
 #define FLUID_FRACT_MAX ((double)4294967296.0)
 

src/rvoice/fluid_rvoice_dsp.c

@@ -22,6 +22,7 @@
 #include "fluid_phase.h"
 #include "fluid_rvoice.h"
 #include "fluid_sys.h"
+#include "fluid_rvoice_dsp_tables.c"
 
 /* Purpose:
  *
@@ -47,85 +48,6 @@
 
 /* Interpolation (find a value between two samples of the original waveform) */
 
-/* Linear interpolation table (2 coefficients centered on 1st) */
-static fluid_real_t interp_coeff_linear[FLUID_INTERP_MAX][2];
-
-/* 4th order (cubic) interpolation table (4 coefficients centered on 2nd) */
-static fluid_real_t interp_coeff[FLUID_INTERP_MAX][4];
-
-/* 7th order interpolation (7 coefficients centered on 3rd) */
-static fluid_real_t sinc_table7[FLUID_INTERP_MAX][7];
-
-
-#define SINC_INTERP_ORDER 7	/* 7th order constant */
-
-
-/* Initializes interpolation tables */
-void fluid_rvoice_dsp_config(void)
-{
-    int i, i2;
-    double x, v;
-    double i_shifted;
-
-    /* Initialize the coefficients for the interpolation. The math comes
-     * from a mail, posted by Olli Niemitalo to the music-dsp mailing
-     * list (I found it in the music-dsp archives
-     * http://www.smartelectronix.com/musicdsp/).  */
-
-    for(i = 0; i < FLUID_INTERP_MAX; i++)
-    {
-        x = (double) i / (double) FLUID_INTERP_MAX;
-
-        interp_coeff[i][0] = (fluid_real_t)(x * (-0.5 + x * (1 - 0.5 * x)));
-        interp_coeff[i][1] = (fluid_real_t)(1.0 + x * x * (1.5 * x - 2.5));
-        interp_coeff[i][2] = (fluid_real_t)(x * (0.5 + x * (2.0 - 1.5 * x)));
-        interp_coeff[i][3] = (fluid_real_t)(0.5 * x * x * (x - 1.0));
-
-        interp_coeff_linear[i][0] = (fluid_real_t)(1.0 - x);
-        interp_coeff_linear[i][1] = (fluid_real_t)x;
-    }
-
-    /* i: Offset in terms of whole samples */
-    for(i = 0; i < SINC_INTERP_ORDER; i++)
-    {
-        /* i2: Offset in terms of fractional samples ('subsamples') */
-        for(i2 = 0; i2 < FLUID_INTERP_MAX; i2++)
-        {
-            /* center on middle of table */
-            i_shifted = (double)i - ((double)SINC_INTERP_ORDER / 2.0)
-                        + (double)i2 / (double)FLUID_INTERP_MAX;
-
-            /* sinc(0) cannot be calculated straightforward (limit needed for 0/0) */
-            if(fabs(i_shifted) > 0.000001)
-            {
-                double arg = M_PI * i_shifted;
-                v = (fluid_real_t)sin(arg) / (arg);
-                /* Hanning window */
-                v *= (fluid_real_t)0.5 * (1.0 + cos(2.0 * arg / (fluid_real_t)SINC_INTERP_ORDER));
-            }
-            else
-            {
-                v = 1.0;
-            }
-
-            sinc_table7[FLUID_INTERP_MAX - i2 - 1][i] = v;
-        }
-    }
-
-#if 0
-
-    for(i = 0; i < FLUID_INTERP_MAX; i++)
-    {
-        printf("%d %0.3f %0.3f %0.3f %0.3f %0.3f %0.3f %0.3f\n",
-               i, sinc_table7[0][i], sinc_table7[1][i], sinc_table7[2][i],
-               sinc_table7[3][i], sinc_table7[4][i], sinc_table7[5][i], sinc_table7[6][i]);
-    }
-
-#endif
-
-    fluid_check_fpe("interpolation table calculation");
-}
-
 static FLUID_INLINE fluid_real_t
 fluid_rvoice_get_float_sample(const short int *dsp_msb, const char *dsp_lsb, unsigned int idx)
 {

src/rvoice/fluid_rvoice_dsp_tables.h

@@ -0,0 +1,8 @@
+
+#ifndef _FLUID_RVOICE_DSP_TABLES_H
+#define _FLUID_RVOICE_DSP_TABLES_H
+
+#define FLUID_INTERP_MAX         256
+#define SINC_INTERP_ORDER 7	/* 7th order constant */
+
+#endif

src/synth/fluid_gen.c

@@ -150,7 +150,7 @@ fluid_real_t fluid_gen_scale(int gen, float value)
 
 fluid_real_t fluid_gen_scale_nrpn(int gen, int data)
 {
-    fluid_real_t value = (float) data - 8192.0f;
+    data = data - 8192;
-    fluid_clip(value, -8192, 8192);
+    fluid_clip(data, -8192, 8192);
-    return value * (float) fluid_gen_info[gen].nrpn_scale;
+    return (fluid_real_t)(data * fluid_gen_info[gen].nrpn_scale);
 }

src/synth/fluid_synth.c

@@ -285,10 +285,6 @@ fluid_synth_init(void)
     feenableexcept(FE_DIVBYZERO | FE_UNDERFLOW | FE_OVERFLOW | FE_INVALID);
 #endif
 
-    fluid_conversion_config();
-
-    fluid_rvoice_dsp_config();
-
     init_dither();
 
     /* custom_breath2att_mod is not a default modulator specified in SF2.01.

src/utils/fluid_conv.c

@@ -19,74 +19,7 @@
  */
 
 #include "fluid_conv.h"
-
+#include "fluid_conv_tables.c"
-#define FLUID_CENTS_HZ_SIZE     1200
-#define FLUID_VEL_CB_SIZE       128
-#define FLUID_CB_AMP_SIZE       1441
-#define FLUID_PAN_SIZE          1002
-
-/* conversion tables */
-static fluid_real_t fluid_ct2hz_tab[FLUID_CENTS_HZ_SIZE];
-static fluid_real_t fluid_cb2amp_tab[FLUID_CB_AMP_SIZE];
-static fluid_real_t fluid_concave_tab[FLUID_VEL_CB_SIZE];
-static fluid_real_t fluid_convex_tab[FLUID_VEL_CB_SIZE];
-static fluid_real_t fluid_pan_tab[FLUID_PAN_SIZE];
-
-/*
- * void fluid_synth_init
- *
- * Does all the initialization for this module.
- */
-void
-fluid_conversion_config(void)
-{
-    int i;
-    double x;
-
-    for(i = 0; i < FLUID_CENTS_HZ_SIZE; i++)
-    {
-        fluid_ct2hz_tab[i] = (fluid_real_t) pow(2.0, (double) i / 1200.0);
-    }
-
-    /* centibels to amplitude conversion
-     * Note: SF2.01 section 8.1.3: Initial attenuation range is
-     * between 0 and 144 dB. Therefore a negative attenuation is
-     * not allowed.
-     */
-    for(i = 0; i < FLUID_CB_AMP_SIZE; i++)
-    {
-        fluid_cb2amp_tab[i] = (fluid_real_t) pow(10.0, (double) i / -200.0);
-    }
-
-    /* initialize the conversion tables (see fluid_mod.c
-       fluid_mod_get_value cases 4 and 8) */
-
-    /* concave unipolar positive transform curve */
-    fluid_concave_tab[0] = 0.0;
-    fluid_concave_tab[FLUID_VEL_CB_SIZE - 1] = 1.0;
-
-    /* convex unipolar positive transform curve */
-    fluid_convex_tab[0] = 0;
-    fluid_convex_tab[FLUID_VEL_CB_SIZE - 1] = 1.0;
-
-    /* There seems to be an error in the specs. The equations are
-       implemented according to the pictures on SF2.01 page 73. */
-
-    for(i = 1; i < FLUID_VEL_CB_SIZE - 1; i++)
-    {
-        x = (-200.0 / FLUID_PEAK_ATTENUATION) * log((i * i) / (fluid_real_t)((FLUID_VEL_CB_SIZE - 1) * (FLUID_VEL_CB_SIZE - 1))) / M_LN10;
-        fluid_convex_tab[i] = (fluid_real_t)(1.0 - x);
-        fluid_concave_tab[(FLUID_VEL_CB_SIZE - 1) - i] = (fluid_real_t) x;
-    }
-
-    /* initialize the pan conversion table */
-    x = M_PI / 2.0 / (FLUID_PAN_SIZE - 1.0);
-
-    for(i = 0; i < FLUID_PAN_SIZE; i++)
-    {
-        fluid_pan_tab[i] = (fluid_real_t) sin(i * x);
-    }
-}
 
 /*
  * fluid_ct2hz
@@ -299,6 +232,13 @@ fluid_tc2sec_release(fluid_real_t tc)
  * fluid_act2hz
  *
  * Convert from absolute cents to Hertz
+ * 
+ * The inverse operation, converting from Hertz to cents, was unused and implemented as
+ *
+fluid_hz2ct(fluid_real_t f)
+{
+    return (fluid_real_t)(6900 + (1200 / M_LN2) * log(f / 440.0));
+}
  */
 fluid_real_t
 fluid_act2hz(fluid_real_t c)
@@ -306,17 +246,6 @@ fluid_act2hz(fluid_real_t c)
     return (fluid_real_t)(8.176 * pow(2.0, (double) c / 1200.0));
 }
 
-/*
- * fluid_hz2ct
- *
- * Convert from Hertz to cents
- */
-fluid_real_t
-fluid_hz2ct(fluid_real_t f)
-{
-    return (fluid_real_t)(6900 + 1200 * log(f / 440.0) / M_LN2);
-}
-
 /*
  * fluid_pan
  */
@@ -407,3 +336,4 @@ fluid_convex(fluid_real_t val)
 
     return fluid_convex_tab[(int) val];
 }
+

src/utils/fluid_conv.h

@@ -22,39 +22,7 @@
 #define _FLUID_CONV_H
 
 #include "fluidsynth_priv.h"
-
+#include "utils/fluid_conv_tables.h"
-/*
- Attenuation range in centibels.
- Attenuation range is the dynamic range of the volume envelope generator
- from 0 to the end of attack segment.
- fluidsynth is a 24 bit synth, it could (should??) be 144 dB of attenuation.
- However the spec makes no distinction between 16 or 24 bit synths, so use
- 96 dB here.
-
- Note about usefulness of 24 bits:
- 1)Even fluidsynth is a 24 bit synth, this format is only relevant if
- the sample format coming from the soundfont is 24 bits and the audio sample format
- choosen by the application (audio.sample.format) is not 16 bits.
-
- 2)When the sample soundfont is 16 bits, the internal 24 bits number have
- 16 bits msb and lsb to 0. Consequently, at the DAC output, the dynamic range of
- this 24 bit sample is reduced to the the dynamic of a 16 bits sample (ie 90 db)
- even if this sample is produced by the audio driver using an audio sample format
- compatible for a 24 bit DAC.
-
- 3)When the audio sample format settings is 16 bits (audio.sample.format), the
- audio driver will make use of a 16 bit DAC, and the dynamic will be reduced to 96 dB
- even if the initial sample comes from a 24 bits soundfont.
-
- In both cases (2) or (3), the real dynamic range is only 96 dB.
-
- Other consideration for FLUID_NOISE_FLOOR related to case (1),(2,3):
- - for case (1), FLUID_NOISE_FLOOR should be the noise floor for 24 bits (i.e -138 dB).
- - for case (2) or (3), FLUID_NOISE_FLOOR should be the noise floor for 16 bits (i.e -90 dB).
- */
-#define FLUID_PEAK_ATTENUATION  960.0f
-
-void fluid_conversion_config(void);
 
 fluid_real_t fluid_ct2hz_real(fluid_real_t cents);
 fluid_real_t fluid_ct2hz(fluid_real_t cents);
@@ -64,7 +32,6 @@ fluid_real_t fluid_tc2sec_delay(fluid_real_t tc);
 fluid_real_t fluid_tc2sec_attack(fluid_real_t tc);
 fluid_real_t fluid_tc2sec_release(fluid_real_t tc);
 fluid_real_t fluid_act2hz(fluid_real_t c);
-fluid_real_t fluid_hz2ct(fluid_real_t c);
 fluid_real_t fluid_pan(fluid_real_t c, int left);
 fluid_real_t fluid_balance(fluid_real_t balance, int left);
 fluid_real_t fluid_concave(fluid_real_t val);

src/utils/fluid_conv_tables.h

@@ -0,0 +1,41 @@
+
+#ifndef _FLUID_CONV_TABLES_H
+#define _FLUID_CONV_TABLES_H
+
+/*
+ Attenuation range in centibels.
+ Attenuation range is the dynamic range of the volume envelope generator
+ from 0 to the end of attack segment.
+ fluidsynth is a 24 bit synth, it could (should??) be 144 dB of attenuation.
+ However the spec makes no distinction between 16 or 24 bit synths, so use
+ 96 dB here.
+
+ Note about usefulness of 24 bits:
+ 1)Even fluidsynth is a 24 bit synth, this format is only relevant if
+ the sample format coming from the soundfont is 24 bits and the audio sample format
+ choosen by the application (audio.sample.format) is not 16 bits.
+
+ 2)When the sample soundfont is 16 bits, the internal 24 bits number have
+ 16 bits msb and lsb to 0. Consequently, at the DAC output, the dynamic range of
+ this 24 bit sample is reduced to the the dynamic of a 16 bits sample (ie 90 db)
+ even if this sample is produced by the audio driver using an audio sample format
+ compatible for a 24 bit DAC.
+
+ 3)When the audio sample format settings is 16 bits (audio.sample.format), the
+ audio driver will make use of a 16 bit DAC, and the dynamic will be reduced to 96 dB
+ even if the initial sample comes from a 24 bits soundfont.
+
+ In both cases (2) or (3), the real dynamic range is only 96 dB.
+
+ Other consideration for FLUID_NOISE_FLOOR related to case (1),(2,3):
+ - for case (1), FLUID_NOISE_FLOOR should be the noise floor for 24 bits (i.e -138 dB).
+ - for case (2) or (3), FLUID_NOISE_FLOOR should be the noise floor for 16 bits (i.e -90 dB).
+ */
+#define FLUID_PEAK_ATTENUATION  960.0f
+
+#define FLUID_CENTS_HZ_SIZE     1200
+#define FLUID_VEL_CB_SIZE       128
+#define FLUID_CB_AMP_SIZE       1441
+#define FLUID_PAN_SIZE          1002
+
+#endif