double tuningcents[128]; ::fluid_synth_tuning_dump(m_pSynth, tuningBank, tuningProg, NULL, 0, tuningcents);
Will work, because every c-array can decay to a pointer. You dont need double* pTuningcents. Basically you're missing one important thing: checking the return values! And I bet it returns FLUID_FAILED. Why? Because you must first activate some kind of tuning via - fluid_synth_activate_tuning() or - fluid_synth_activate_key_tuning() or - fluid_synth_tune_notes() or - fluid_synth_select_tuning() that I dont see anywhere. The tuningBank and tuningProg you then request from fluid_synth_tuning_dump() must be the same as you used in these previous activation calls. > "tuningcents" & "pTuningcents" are member variables of the " qsynthTuningsForm" class. Should they be public, private, or protected? protected if you want to inherit "qsynthTuningsForm" and override " qsynthTuningsForm::updateAllKeyTunings()". You probably dont want to, so tuningcents should be private. > Should "fluid_synth_tuning_dump" be a friend function to this class? No. "fluid_synth_tuning_dump" is a plain old C function that is public to everyone and everything. Tom 2017-09-22 5:16 GMT+02:00 Liam McGillivray <liammcgillivra...@gmail.com>: > I have a fork of QSynth on GitHub, in which I'm trying to add a menu for > retuning notes. > > https://github.com/LiamM32/qsynth > > I am not experienced in programming or good at C/C++, so bear with me. > > First I'm trying to make it display the current values of each note, but I > can't get the function "fluid_synth_tuning_dump" to work. In the image I > attached, you can see the strange numbers in the "detune" column, which are > supposed to be set to the pitch of each note in cents. Through a debugger, > I have found that these are the default values from when the array was > initialized (don't know why). The function isn't actually modifying the > values in this array as it's supposed to. > > Maybe I'm not properly passing the array into the function. I used to > simply pass the array into the function like this, back when I had a worse > understanding of C++. (I shelved this project a while ago, but returned to > it recently.) > > double tuningcents[128]; > ::fluid_synth_tuning_dump(m_pSynth, tuningBank, tuningProg, NULL, 0, > tuningcents); > > This didn't work. But looking at it now, I notice that the last parameter > is supposed to be a pointer to a double. So I changed it to this: > > double tuningcents[128]; > double* pTuningcents = tuningcents; > ::fluid_synth_tuning_dump(m_pSynth, tuningBank, tuningProg, NULL, 0, > pTuningcents); > > But it's still not changing the values in the "tuningcents" array. You > can see the exact lines I wrote in *qSynthTuningsForm.cpp > <https://github.com/LiamM32/qsynth/blob/master/src/qsynthTuningsForm.cpp> *in > function "qsynthTuningsForm::updateAllKeyTunings()". > > "tuningcents" & "pTuningcents" are member variables of the " > qsynthTuningsForm" class. Should they be public, private, or protected? > Should "fluid_synth_tuning_dump" be a friend function to this class? > > > _______________________________________________ > fluid-dev mailing list > fluid-dev@nongnu.org > https://lists.nongnu.org/mailman/listinfo/fluid-dev > >
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