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Some improvements to filter turn off optimization and minimum volume envelope 

release to minimize clicks, as well as a few other things.
This commit is contained in:
Element Green 2003-08-19 20:57:00 +00:00
parent 304936e612
commit 1928baf194
6 changed files with 46 additions and 12 deletions
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14
fluidsynth/ChangeLog
View File

@ -1,3 +1,17 @@
2003-08-19 Josh Green <jgreen@users.sourceforge.net>
* src/fluid_alsa.c: Added some calls to snd_strerror() to print out
details of ALSA routine failures.
* src/fluid_defsfont.c: Put a message about SoundFont loading code
being borrowed from Smurf SoundFont Editor.
* src/fluid_rev.c: Valgrind found that some values were being used
uninitialized because fluid_revmodel_update() was being called before
all reverb parameters were set, now setting manually and then calling
update routine.
* src/fluid_voice.c: Increased FLUID_MAX_AUDIBLE_FILTER_FC to minimize
clicks from filter toggling. Added a FLUID_MIN_VOLENVRELEASE constant
to set the minimum volume envelope release to minimize clicks.
2003-07-22 Josh Green <jgreen@users.sourceforge.net>
* src/fluid_midishare.c: Added include of header "config.h" as

10
fluidsynth/src/fluid_alsa.c
View File

@ -236,14 +236,16 @@ new_fluid_alsa_audio_driver2(fluid_settings_t* settings,
continue;
}
if (snd_pcm_hw_params_set_channels(dev->pcm, hwparams, 2) != 0) {
FLUID_LOG(FLUID_ERR, "Failed to set the channels");
if ((err = snd_pcm_hw_params_set_channels(dev->pcm, hwparams, 2)) != 0) {
FLUID_LOG(FLUID_ERR, "Failed to set the channels: %s",
snd_strerror (err));
goto error_recovery;
}
tmp = (unsigned int) sample_rate;
if (snd_pcm_hw_params_set_rate_near(dev->pcm, hwparams, &tmp, &dir) != 0) {
FLUID_LOG(FLUID_ERR, "Failed to set the sample rate");
if ((err = snd_pcm_hw_params_set_rate_near(dev->pcm, hwparams, &tmp, &dir)) != 0) {
FLUID_LOG(FLUID_ERR, "Failed to set the sample rate: %s",
snd_strerror (err));
goto error_recovery;
}
if (dir != 0) {

11
fluidsynth/src/fluid_defsfont.c
View File

@ -2,6 +2,9 @@
*
* Copyright (C) 2003 Peter Hanappe and others.
*
* SoundFont file loading code borrowed from Smurf SoundFont Editor
* Copyright (C) 1999-2001 Josh Green
*
* This library is free software; you can redistribute it and/or
* modify it under the terms of the GNU Library General Public License
* as published by the Free Software Foundation; either version 2 of
@ -1632,7 +1635,9 @@ fluid_sample_import_sfont(fluid_sample_t* sample, SFSample* sfsample, fluid_defs
/*=================================sfload.c========================*/
/*=================================sfload.c========================
Borrowed from Smurf SoundFont Editor by Josh Green
=================================================================*/
/*
functions for loading data from sfont files, with appropriate byte swapping
@ -2967,7 +2972,9 @@ fixup_sample (SFData * sf)
return (OK);
}
/*=================================sfont.c========================*/
/*=================================sfont.c========================
Smurf SoundFont Editor
================================================================*/
/* optimum chunk area sizes (could be more optimum) */

2
fluidsynth/src/fluid_defsfont.h
View File

@ -2,6 +2,8 @@
*
* Copyright (C) 2003 Peter Hanappe and others.
*
* SoundFont loading code borrowed from Smurf SoundFont Editor by Josh Green
*
* This library is free software; you can redistribute it and/or
* modify it under the terms of the GNU Library General Public License
* as published by the Free Software Foundation; either version 2 of

14
fluidsynth/src/fluid_rev.c
View File

@ -354,10 +354,16 @@ new_fluid_revmodel()
fluid_allpass_setfeedback(&rev->allpassR[2], 0.5f);
fluid_allpass_setfeedback(&rev->allpassL[3], 0.5f);
fluid_allpass_setfeedback(&rev->allpassR[3], 0.5f);
fluid_revmodel_setlevel(rev, initialwet);
fluid_revmodel_setroomsize(rev, initialroom);
fluid_revmodel_setdamp(rev, initialdamp);
fluid_revmodel_setwidth(rev, initialwidth);
/* set values manually, since calling set functions causes update
and all values should be initialized for an update */
rev->roomsize = initialroom * scaleroom + offsetroom;
rev->damp = initialdamp * scaledamp;
rev->wet = initialwet * scalewet;
rev->width = initialwidth;
/* now its okay to update reverb */
fluid_revmodel_update (rev);
/* Clear all buffers */
fluid_revmodel_init(rev);

7
fluidsynth/src/fluid_voice.c
View File

@ -41,7 +41,7 @@ sse_t* interp_coeff_sse;
/* used for filter turn off optimization - if filter cutoff is above the
specified value and filter q is below the other value, turn filter off */
#define FLUID_MAX_AUDIBLE_FILTER_FC 16000.0f
#define FLUID_MAX_AUDIBLE_FILTER_FC 19000.0f
#define FLUID_MIN_AUDIBLE_FILTER_Q 1.2f
/* Smallest amplitude that can be perceived (full scale is +/- 0.5)
@ -54,6 +54,9 @@ sse_t* interp_coeff_sse;
#define FLUID_MIN_LOOP_SIZE 2
#define FLUID_MIN_LOOP_PAD 1
/* min vol envelope release (to stop clicks) in SoundFont timecents */
#define FLUID_MIN_VOLENVRELEASE -7200.0f /* ~16ms */
fluid_interp_coeff_t interp_coeff[FLUID_INTERP_MAX];
fluid_interp_coeff_t interp_coeff_linear[FLUID_INTERP_MAX];
fluid_real_t sinc_table7[7][FLUID_INTERP_MAX];
@ -1377,7 +1380,7 @@ fluid_voice_update_param(fluid_voice_t* voice, int gen)
case GEN_VOLENVRELEASE: /* SF2.01 section 8.1.3 # 38 */
x = _GEN(voice, GEN_VOLENVRELEASE);
fluid_clip(x, -12000.0f, 8000.0f);
fluid_clip(x, FLUID_MIN_VOLENVRELEASE, 8000.0f);
count = 1 + NUM_BUFFERS_RELEASE(x);
voice->volenv_data[FLUID_VOICE_ENVRELEASE].count = count;
voice->volenv_data[FLUID_VOICE_ENVRELEASE].coeff = 1.0f;