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Decoder/FluidSynth: Allow gain to be adjusted

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This commit is contained in:
Sean DuBois 2023-01-31 15:17:51 -05:00
parent f1cea1f152
commit a41414e0e0
1 changed files with 18 additions and 0 deletions
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18
src/decoder/plugins/FluidsynthDecoderPlugin.cxx
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@ -21,6 +21,7 @@
#include "../DecoderAPI.hxx"
#include "pcm/CheckAudioFormat.hxx"
#include "fs/Path.hxx"
#include "lib/fmt/RuntimeError.hxx"
#include "util/Domain.hxx"
#include "Log.hxx"
@ -29,6 +30,8 @@
static constexpr Domain fluidsynth_domain("fluidsynth");
static unsigned sample_rate;
static double gain = 0.0;
static bool gain_set = false;
static const char *soundfont_path;
/**
@ -83,6 +86,17 @@ fluidsynth_init(const ConfigBlock &block)
soundfont_path = block.GetBlockValue("soundfont",
"/usr/share/sounds/sf2/FluidR3_GM.sf2");
char *endptr;
const char *svalue = block.GetBlockValue("gain");
if (svalue != nullptr) {
gain = strtod(svalue, &endptr);
if (svalue == endptr || *endptr != 0) {
throw FmtRuntimeError(
"fluidsynth decoder gain value not a number: {}", svalue);
}
gain_set = true;
}
fluid_set_log_function(LAST_LOG_LEVEL,
fluidsynth_mpd_log_function, nullptr);
@ -93,6 +107,7 @@ static void
fluidsynth_file_decode(DecoderClient &client, Path path_fs)
{
char setting_sample_rate[] = "synth.sample-rate";
char setting_gain[] = "synth.gain";
/*
char setting_verbose[] = "synth.verbose";
char setting_yes[] = "yes";
@ -109,6 +124,9 @@ fluidsynth_file_decode(DecoderClient &client, Path path_fs)
return;
fluid_settings_setnum(settings, setting_sample_rate, sample_rate);
if (gain_set) {
fluid_settings_setnum(settings, setting_gain, gain);
}
/*
fluid_settings_setstr(settings, setting_verbose, setting_yes);