* Copyright (C) 2003 Peter Hanappe and others.
*
* 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
+ * 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
- * Library General Public License for more details.
+ * Lesser General Public License for more details.
*
- * You should have received a copy of the GNU Library General Public
+ * 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., 51 Franklin Street, Fifth Floor, Boston, MA
* 02110-1301, USA
/* Smallest amplitude that can be perceived (full scale is +/- 0.5)
* 16 bits => 96+4=100 dB dynamic range => 0.00001
- * 0.00001 * 2 is approximately 0.00003 :)
+ * 24 bits => 144-4 = 140 dB dynamic range => 1.e-7
+ * 1.e-7 * 2 == 2.e-7 :)
*/
-#define FLUID_NOISE_FLOOR 0.00003
+#define FLUID_NOISE_FLOOR 2.e-7
-
-enum fluid_loop {
- FLUID_UNLOOPED = 0,
- FLUID_LOOP_DURING_RELEASE = 1,
- FLUID_NOTUSED = 2,
- FLUID_LOOP_UNTIL_RELEASE = 3
+enum fluid_loop
+{
+ FLUID_UNLOOPED = 0,
+ FLUID_LOOP_DURING_RELEASE = 1,
+ FLUID_NOTUSED = 2,
+ FLUID_LOOP_UNTIL_RELEASE = 3
};
-/**
+/*
* rvoice ticks-based parameters
* These parameters must be updated even if the voice is currently quiet.
*/
struct _fluid_rvoice_envlfo_t
{
- /* Note-off minimum length */
- unsigned int ticks;
- unsigned int noteoff_ticks;
-
- /* vol env */
- fluid_adsr_env_t volenv;
-
- /* mod env */
- fluid_adsr_env_t modenv;
- fluid_real_t modenv_to_fc;
- fluid_real_t modenv_to_pitch;
-
- /* mod lfo */
- fluid_lfo_t modlfo;
- fluid_real_t modlfo_to_fc;
- fluid_real_t modlfo_to_pitch;
- fluid_real_t modlfo_to_vol;
-
- /* vib lfo */
- fluid_lfo_t viblfo;
- fluid_real_t viblfo_to_pitch;
+ /* Note-off minimum length */
+ unsigned int ticks;
+ unsigned int noteoff_ticks;
+
+ /* vol env */
+ fluid_adsr_env_t volenv;
+
+ /* mod env */
+ fluid_adsr_env_t modenv;
+ fluid_real_t modenv_to_fc;
+ fluid_real_t modenv_to_pitch;
+
+ /* mod lfo */
+ fluid_lfo_t modlfo;
+ fluid_real_t modlfo_to_fc;
+ fluid_real_t modlfo_to_pitch;
+ fluid_real_t modlfo_to_vol;
+
+ /* vib lfo */
+ fluid_lfo_t viblfo;
+ fluid_real_t viblfo_to_pitch;
};
-/**
+/*
* rvoice parameters needed for dsp interpolation
*/
struct _fluid_rvoice_dsp_t
{
- /* interpolation method, as in fluid_interp in fluidsynth.h */
- int interp_method;
- fluid_sample_t* sample;
- int check_sample_sanity_flag; /* Flag that initiates, that sample-related parameters
- have to be checked. */
-
- /* sample and loop start and end points (offset in sample memory). */
- int start;
- int end;
- int loopstart;
- int loopend; /* Note: first point following the loop (superimposed on loopstart) */
- enum fluid_loop samplemode;
-
- /* Stuff needed for phase calculations */
-
- fluid_real_t pitch; /* the pitch in midicents */
- fluid_real_t root_pitch_hz;
- fluid_real_t output_rate;
-
- /* Stuff needed for amplitude calculations */
-
- int has_looped; /* Flag that is set as soon as the first loop is completed. */
- fluid_real_t attenuation; /* the attenuation in centibels */
- fluid_real_t min_attenuation_cB; /* Estimate on the smallest possible attenuation
- * during the lifetime of the voice */
- fluid_real_t amplitude_that_reaches_noise_floor_nonloop;
- fluid_real_t amplitude_that_reaches_noise_floor_loop;
- fluid_real_t synth_gain; /* master gain */
+ /* interpolation method, as in fluid_interp in fluidsynth.h */
+ enum fluid_interp interp_method;
+ enum fluid_loop samplemode;
+
+ /* Flag that is set as soon as the first loop is completed. */
+ char has_looped;
+ /* Flag that initiates, that sample-related parameters have to be checked. */
+ char check_sample_sanity_flag;
- /* Dynamic input to the interpolator below */
+ fluid_sample_t *sample;
- fluid_real_t *dsp_buf; /* buffer to store interpolated sample data to */
+ /* sample and loop start and end points (offset in sample memory). */
+ int start;
+ int end;
+ int loopstart;
+ int loopend; /* Note: first point following the loop (superimposed on loopstart) */
- fluid_real_t amp; /* current linear amplitude */
- fluid_real_t amp_incr; /* amplitude increment value for the next FLUID_BUFSIZE samples */
+ /* Stuff needed for portamento calculations */
+ fluid_real_t pitchoffset; /* the portamento range in midicents */
+ fluid_real_t pitchinc; /* the portamento increment in midicents */
- fluid_phase_t phase; /* the phase (current sample offset) of the sample wave */
- fluid_real_t phase_incr; /* the phase increment for the next FLUID_BUFSIZE samples */
- int is_looping;
+ /* Stuff needed for phase calculations */
+ fluid_real_t pitch; /* the pitch in midicents */
+ fluid_real_t root_pitch_hz;
+ fluid_real_t output_rate;
+
+ /* Stuff needed for amplitude calculations */
+
+ fluid_real_t attenuation; /* the attenuation in centibels */
+ fluid_real_t prev_attenuation; /* the previous attenuation in centibels
+ used by fluid_rvoice_multi_retrigger_attack() */
+ fluid_real_t min_attenuation_cB; /* Estimate on the smallest possible attenuation
+ * during the lifetime of the voice */
+ fluid_real_t amplitude_that_reaches_noise_floor_nonloop;
+ fluid_real_t amplitude_that_reaches_noise_floor_loop;
+ fluid_real_t synth_gain; /* master gain */
+
+ /* Dynamic input to the interpolator below */
+
+ fluid_real_t amp; /* current linear amplitude */
+ fluid_real_t amp_incr; /* amplitude increment value for the next FLUID_BUFSIZE samples */
+
+ fluid_phase_t phase; /* the phase (current sample offset) of the sample wave */
+ fluid_real_t phase_incr; /* the phase increment for the next FLUID_BUFSIZE samples */
};
/* Currently left, right, reverb, chorus. To be changed if we
ever add surround positioning, or stereo reverb/chorus */
#define FLUID_RVOICE_MAX_BUFS (4)
-/**
+/*
* rvoice mixer-related parameters
*/
struct _fluid_rvoice_buffers_t
{
- unsigned int count; /* Number of records in "bufs" */
- struct {
- fluid_real_t amp;
- int mapping; /* Mapping to mixdown buffer index */
- } bufs[FLUID_RVOICE_MAX_BUFS];
+ unsigned int count; /* Number of records in "bufs" */
+ struct
+ {
+ fluid_real_t amp;
+ int mapping; /* Mapping to mixdown buffer index */
+ } bufs[FLUID_RVOICE_MAX_BUFS];
};
-/**
- * Parameters needed to synthesize a voice
+/*
+ * Hard real-time parameters needed to synthesize a voice
*/
struct _fluid_rvoice_t
{
- fluid_rvoice_envlfo_t envlfo;
- fluid_rvoice_dsp_t dsp;
- fluid_iir_filter_t resonant_filter; /* IIR resonant dsp filter */
- fluid_rvoice_buffers_t buffers;
+ fluid_rvoice_envlfo_t envlfo;
+ fluid_rvoice_dsp_t dsp;
+ fluid_iir_filter_t resonant_filter; /* IIR resonant dsp filter */
+ fluid_iir_filter_t resonant_custom_filter; /* optional custom/general-purpose IIR resonant filter */
+ fluid_rvoice_buffers_t buffers;
};
-int fluid_rvoice_write(fluid_rvoice_t* voice, fluid_real_t *dsp_buf);
-
-void fluid_rvoice_buffers_mix(fluid_rvoice_buffers_t* buffers,
- fluid_real_t* dsp_buf, int samplecount,
- fluid_real_t** dest_bufs, int dest_bufcount);
-void fluid_rvoice_buffers_set_amp(fluid_rvoice_buffers_t* buffers,
- unsigned int bufnum, fluid_real_t value);
-void fluid_rvoice_buffers_set_mapping(fluid_rvoice_buffers_t* buffers,
- unsigned int bufnum, int mapping);
-
-/* Dynamic update functions */
-
-void fluid_rvoice_noteoff(fluid_rvoice_t* voice, unsigned int min_ticks);
-void fluid_rvoice_voiceoff(fluid_rvoice_t* voice);
-void fluid_rvoice_reset(fluid_rvoice_t* voice);
-void fluid_rvoice_set_output_rate(fluid_rvoice_t* voice, fluid_real_t output_rate);
-void fluid_rvoice_set_interp_method(fluid_rvoice_t* voice, int interp_method);
-void fluid_rvoice_set_root_pitch_hz(fluid_rvoice_t* voice, fluid_real_t root_pitch_hz);
-void fluid_rvoice_set_pitch(fluid_rvoice_t* voice, fluid_real_t value);
-void fluid_rvoice_set_synth_gain(fluid_rvoice_t* voice, fluid_real_t value);
-void fluid_rvoice_set_attenuation(fluid_rvoice_t* voice, fluid_real_t value);
-void fluid_rvoice_set_min_attenuation_cB(fluid_rvoice_t* voice, fluid_real_t value);
-void fluid_rvoice_set_viblfo_to_pitch(fluid_rvoice_t* voice, fluid_real_t value);
-void fluid_rvoice_set_modlfo_to_pitch(fluid_rvoice_t* voice, fluid_real_t value);
-void fluid_rvoice_set_modlfo_to_vol(fluid_rvoice_t* voice, fluid_real_t value);
-void fluid_rvoice_set_modlfo_to_fc(fluid_rvoice_t* voice, fluid_real_t value);
-void fluid_rvoice_set_modenv_to_fc(fluid_rvoice_t* voice, fluid_real_t value);
-void fluid_rvoice_set_modenv_to_pitch(fluid_rvoice_t* voice, fluid_real_t value);
-void fluid_rvoice_set_start(fluid_rvoice_t* voice, int value);
-void fluid_rvoice_set_end(fluid_rvoice_t* voice, int value);
-void fluid_rvoice_set_loopstart(fluid_rvoice_t* voice, int value);
-void fluid_rvoice_set_loopend(fluid_rvoice_t* voice, int value);
-void fluid_rvoice_set_sample(fluid_rvoice_t* voice, fluid_sample_t* value);
-void fluid_rvoice_set_samplemode(fluid_rvoice_t* voice, enum fluid_loop value);
+int fluid_rvoice_write(fluid_rvoice_t *voice, fluid_real_t *dsp_buf);
+
+DECLARE_FLUID_RVOICE_FUNCTION(fluid_rvoice_buffers_set_amp);
+DECLARE_FLUID_RVOICE_FUNCTION(fluid_rvoice_buffers_set_mapping);
+
+DECLARE_FLUID_RVOICE_FUNCTION(fluid_rvoice_noteoff);
+DECLARE_FLUID_RVOICE_FUNCTION(fluid_rvoice_voiceoff);
+DECLARE_FLUID_RVOICE_FUNCTION(fluid_rvoice_reset);
+DECLARE_FLUID_RVOICE_FUNCTION(fluid_rvoice_multi_retrigger_attack);
+DECLARE_FLUID_RVOICE_FUNCTION(fluid_rvoice_set_portamento);
+DECLARE_FLUID_RVOICE_FUNCTION(fluid_rvoice_set_output_rate);
+DECLARE_FLUID_RVOICE_FUNCTION(fluid_rvoice_set_interp_method);
+DECLARE_FLUID_RVOICE_FUNCTION(fluid_rvoice_set_root_pitch_hz);
+DECLARE_FLUID_RVOICE_FUNCTION(fluid_rvoice_set_pitch);
+DECLARE_FLUID_RVOICE_FUNCTION(fluid_rvoice_set_attenuation);
+DECLARE_FLUID_RVOICE_FUNCTION(fluid_rvoice_set_min_attenuation_cB);
+DECLARE_FLUID_RVOICE_FUNCTION(fluid_rvoice_set_viblfo_to_pitch);
+DECLARE_FLUID_RVOICE_FUNCTION(fluid_rvoice_set_modlfo_to_pitch);
+DECLARE_FLUID_RVOICE_FUNCTION(fluid_rvoice_set_modlfo_to_vol);
+DECLARE_FLUID_RVOICE_FUNCTION(fluid_rvoice_set_modlfo_to_fc);
+DECLARE_FLUID_RVOICE_FUNCTION(fluid_rvoice_set_modenv_to_fc);
+DECLARE_FLUID_RVOICE_FUNCTION(fluid_rvoice_set_modenv_to_pitch);
+DECLARE_FLUID_RVOICE_FUNCTION(fluid_rvoice_set_synth_gain);
+DECLARE_FLUID_RVOICE_FUNCTION(fluid_rvoice_set_start);
+DECLARE_FLUID_RVOICE_FUNCTION(fluid_rvoice_set_end);
+DECLARE_FLUID_RVOICE_FUNCTION(fluid_rvoice_set_loopstart);
+DECLARE_FLUID_RVOICE_FUNCTION(fluid_rvoice_set_loopend);
+DECLARE_FLUID_RVOICE_FUNCTION(fluid_rvoice_set_samplemode);
+DECLARE_FLUID_RVOICE_FUNCTION(fluid_rvoice_set_sample);
/* defined in fluid_rvoice_dsp.c */
+void fluid_rvoice_dsp_config(void);
+int fluid_rvoice_dsp_interpolate_none(fluid_rvoice_dsp_t *voice, fluid_real_t *FLUID_RESTRICT dsp_buf, int is_looping);
+int fluid_rvoice_dsp_interpolate_linear(fluid_rvoice_dsp_t *voice, fluid_real_t *FLUID_RESTRICT dsp_buf, int is_looping);
+int fluid_rvoice_dsp_interpolate_4th_order(fluid_rvoice_dsp_t *voice, fluid_real_t *FLUID_RESTRICT dsp_buf, int is_looping);
+int fluid_rvoice_dsp_interpolate_7th_order(fluid_rvoice_dsp_t *voice, fluid_real_t *FLUID_RESTRICT dsp_buf, int is_looping);
-void fluid_rvoice_dsp_config (void);
-int fluid_rvoice_dsp_interpolate_none (fluid_rvoice_dsp_t *voice);
-int fluid_rvoice_dsp_interpolate_linear (fluid_rvoice_dsp_t *voice);
-int fluid_rvoice_dsp_interpolate_4th_order (fluid_rvoice_dsp_t *voice);
-int fluid_rvoice_dsp_interpolate_7th_order (fluid_rvoice_dsp_t *voice);
+
+/*
+ * Combines the most significant 16 bit part of a sample with a potentially present
+ * least sig. 8 bit part in order to create a 24 bit sample.
+ */
+static FLUID_INLINE int32_t
+fluid_rvoice_get_sample(const short int *dsp_msb, const char *dsp_lsb, unsigned int idx)
+{
+ /* cast sample to unsigned type, so we can safely shift and bitwise or
+ * without relying on undefined behaviour (should never happen anyway ofc...) */
+ uint32_t msb = (uint32_t)dsp_msb[idx];
+ uint8_t lsb = 0U;
+
+ /* most soundfonts have 16 bit samples, assume that it's unlikely we
+ * experience 24 bit samples here */
+ if(FLUID_UNLIKELY(dsp_lsb != NULL))
+ {
+ lsb = (uint8_t)dsp_lsb[idx];
+ }
+
+ return (int32_t)((msb << 8) | lsb);
+}
#endif
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