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Handle sample rate changes and change sample rate to unsigned long (as defined in ladspa.h)

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This commit is contained in:
Marcus Weseloh 2017-10-20 15:51:20 +02:00
parent 4a047726e2
commit ce79b5f952
3 changed files with 53 additions and 3 deletions
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41
src/bindings/fluid_ladspa.c
View file

@ -34,6 +34,8 @@
#define LADSPA_API_ENTER(_fx) (fluid_rec_mutex_lock((_fx)->api_mutex))
#define LADSPA_API_EXIT(_fx) (fluid_rec_mutex_unlock((_fx)->api_mutex))
#define LADSPA_API_RETURN(_fx, _ret) \
fluid_rec_mutex_unlock((_fx)->api_mutex); \
return (_ret);
@ -88,7 +90,7 @@ fluid_ladspa_fx_t *new_fluid_ladspa_fx(fluid_synth_t *synth)
fx->state = FLUID_LADSPA_INACTIVE;
fx->sample_rate = synth->sample_rate;
fx->sample_rate = (unsigned long)synth->sample_rate;
fx->audio_groups = synth->audio_groups;
fx->effects_channels = synth->effects_channels;
@ -159,6 +161,43 @@ void delete_fluid_ladspa_fx(fluid_ladspa_fx_t *fx)
FLUID_FREE(fx);
};
/**
* Set the sample rate of the LADSPA effects.
*
* Resets the LADSPA effects if the sample rate is different from the
* previous sample rate.
*
* @param fx LADSPA fx instance
* @param sample_rate new sample rate
*/
void fluid_ladspa_set_sample_rate(fluid_ladspa_fx_t *fx, fluid_synth_t *synth)
{
unsigned long new_sample_rate = (unsigned long)synth->sample_rate;
LADSPA_API_ENTER(fx);
if (fx->sample_rate == new_sample_rate)
{
LADSPA_API_EXIT(fx);
return;
}
if (fluid_ladspa_is_active(fx))
{
if (fluid_ladspa_deactivate(fx, synth) != FLUID_OK)
{
FLUID_LOG(FLUID_ERR, "Failed to deactivate LADSPA, unable to change sample rate");
LADSPA_API_EXIT(fx);
return;
}
}
clear_ladspa(fx);
fx->sample_rate = new_sample_rate;
LADSPA_API_EXIT(fx);
}
/**
* Check if the LADSPA engine is in use by FluidSynth.
*

3
src/bindings/fluid_ladspa.h
View file

@ -94,7 +94,7 @@ typedef struct _fluid_ladspa_node_t
typedef struct _fluid_ladspa_fx_t
{
int sample_rate;
unsigned long sample_rate;
int audio_groups;
int effects_channels;
@ -124,6 +124,7 @@ typedef struct _fluid_ladspa_fx_t
fluid_ladspa_fx_t *new_fluid_ladspa_fx(fluid_synth_t *synth);
void delete_fluid_ladspa_fx(fluid_ladspa_fx_t *fx);
void fluid_ladspa_set_sample_rate(fluid_ladspa_fx_t *fx, fluid_synth_t *synth);
int fluid_ladspa_is_active(fluid_ladspa_fx_t *fx);
int fluid_ladspa_activate(fluid_ladspa_fx_t *fx, fluid_synth_t *synth);

12
src/synth/fluid_synth.c
View file

@ -2350,7 +2350,7 @@ fluid_synth_update_presets(fluid_synth_t* synth)
}
}
/* Handler for synth.gain setting. */
/* Handler for synth.sample-rate setting. */
static int
fluid_synth_update_sample_rate(fluid_synth_t* synth, char* name, double value)
{
@ -2383,6 +2383,16 @@ fluid_synth_set_sample_rate(fluid_synth_t* synth, float sample_rate)
fluid_synth_update_mixer(synth, fluid_rvoice_mixer_set_samplerate,
0, sample_rate);
fluid_synth_api_exit(synth);
#ifdef LADSPA
/* Signal sample rate change to LADSPA effects. Called after releasing the
* synth api, as LADSPA might need to wait for rvoice mixer to deactivate
* the effects unit first. */
if (synth->ladspa_fx != NULL)
{
fluid_ladspa_set_sample_rate(synth->ladspa_fx, synth);
}
#endif
}