How do I Switch multi SF2

[syntaro]

Hello and Excuse me. It been multipost.

Im using FluidSynth 2.4.6 libfluidsynth.so for Andorid 13.

When I call following code twice. SIGSEGV always happens.

    if (fluid_is_soundfont(file.mb_str())) {
        handle->soundfont_id = fluid_synth_sfload(handle->synth, file.mb_str(), 0);
    }
    else {
        return -1;
    }

How do I reload Another Font for Android.
I wish I could use FluidSynth for Android 13 and Android 15.

Long program code here.

https://star-advance.org/dx/libfluidsynth-so-for-android/

Or Am I using incorrect version SharedObject file?
How to build it?

[syntaro]

Helllo, I tired some way. but Couldn't get answer, Still need information / comments / helps.

I saw pkg-config, and tried, NDK r27c, but not worked.

and, memory alignment not worked.

if (_allHandle == nullptr) {
    auto ptr = (unsigned long)malloc(sizeof(fluid_handle_t ) * MAX_SYNTH * 2 + 16);
    while ((ptr % 16) != 0) {
        ptr ++;
    }
    _allHandle = (fluid_handle_t *) (void *)ptr;
    if (_allHandle == nullptr) {
        return -1;
    }
    memset(_allHandle, 0, sizeof(fluid_handle_t) * MAX_SYNTH);
}
return 0;

and Permission + fopen / fread not worked. I thought, if Memory Mapping was not good. but this thinking is not truth.

extern "C" {

__cdecl void *my_open(const char *filename) {
FILE *fp = fopen(filename, "r");
return fp;
}

__cdecl int my_read(void *buf, fluid_long_long_t count, void *handle) {
FILE fp = (FILE)handle;
int len = fread(buf, 1, count, fp);
return len == 0 ? -1 : len;
}

__cdecl int my_seek(void *handle, fluid_long_long_t offset, int origin) {
FILE fp = (FILE)handle;
fseek(fp, offset, origin);
return FLUID_OK;
}

__cdecl int my_close(void *handle) {
FILE fp = (FILE)handle;
fclose(fp);
return FLUID_OK;
}

__cdecl fluid_long_long_t my_tell(void *handle) {
FILE fp = (FILE)handle;
long x = ftell(fp);
return x;
}

    if (my_sfloader == nullptr) {
        my_sfloader = new_fluid_defsfloader(handle->settings);
        int x = fluid_sfloader_set_callbacks(my_sfloader,
                                     my_open,
                                     my_read,
                                     my_seek,
                                     my_tell,
                                     my_close);
        fluid_synth_add_sfloader(handle->synth, my_sfloader);
    }

Thank you....

[syntaro]

Now, tried something,I think If i can disable Mem-MAP it will work,,
but, following approach not worked.

    my_sfloader = new_fluid_defsfloader(handle->settings);
    int x = fluid_sfloader_set_callbacks(my_sfloader,
                                         my_open,
                                         my_read,
                                         my_seek,
                                         my_tell,
                                         my_close);
    fluid_synth_add_sfloader(handle->synth, my_sfloader);

with "FluidR3_GM.sf2", when I Load it twice on Android13
after my_close, this error happens.

A Fatal signal 11 (SIGSEGV), code 1 (SEGV_MAPERR), fault addr 0x10001ffffffff in tid 32609 (Thread-6), pid 32444

https://star-advance.org/dx/libfluidsynth-so-for-android/

I need assist. Thank you.

And I feel I can diagnostics myself. but,
Can I hear how to compile FluidSynth myself use Android Studio?

Thank you.

[syntaro]

I got error with Windows + WSL + Ubuntu.

Both this repository and Android Fluid repository.

/mnt/e/fluidsynth-android-master/src/utils/fluid_sys.h:206:36: error: ‘G_FILE_TEST_IS_REGULAR’ undeclared (first use in this function); did you mean ‘FLUID_FILE_TEST_IS_REGULAR’?
206 | #define FLUID_FILE_TEST_IS_REGULAR G_FILE_TEST_IS_REGULAR

Couldn't get hint to build this.

CMake can use GLib2.0?

[syntaro]

I really need Help.

Im from Japan. Nice to meet yours.

Well I liked Android.
And I liked who trying Music Program on Android.
And Kids who having Android and having interrested to Music.

Best regards.

I have two Questions!

My program sequence which load and unload SoundFont is good or having mistake.

And 2nd question. Can I join FluidSynth Development for Android and how to do it?

Thank you.

[syntaro]

CMakeLists.txt need some change

set(GLIB_PKG_INCLUDE_DIRS /usr/include/glib-2.0)
set(GLIB_PKG_CONFIG_DIRS /usr/lib/x86_64-linux-gnu/glib-2.0/include)
set(GLIB_PKG /usr/share/glib-2.0)
set(BUILD_SHARED_LIBS 1)
set(CMAKE_POSITION_INDEPENDENT_CODE 1)

include_directories (
android
${CMAKE_BINARY_DIR}
${CMAKE_SOURCE_DIR}/src
${CMAKE_SOURCE_DIR}/src/drivers
${CMAKE_SOURCE_DIR}/src/synth
${CMAKE_SOURCE_DIR}/src/rvoice
${CMAKE_SOURCE_DIR}/src/midi
${CMAKE_SOURCE_DIR}/src/utils
${CMAKE_SOURCE_DIR}/src/sfloader
${CMAKE_SOURCE_DIR}/src/bindings
${CMAKE_SOURCE_DIR}/include
${CMAKE_BINARY_DIR}/include
${GLIB_PKG_INCLUDE_DIRS}
${GLIB_PKG_CONFIG_DIRS}
)

---

if ( CMAKE_C_COMPILER_ID STREQUAL "Intel" )
# icc needs the restrict flag to recognize C99 restrict pointers
set ( CMAKE_C_FLAGS "${CMAKE_C_FLAGS} -restrict" )
else () # not intel
# gcc and clang support bad function cast and alignment warnings; add them as well.
set ( CMAKE_C_FLAGS "${CMAKE_C_FLAGS} -Wbad-function-cast -Wcast-align -fPIC -align" )
set ( CMAKE_CXX_FLAGS "${CMAKE_CXX_FLAGS} -Wcast-align -fPIC -align" )

CMakeLists.txt

I made /usr/lib/pkgconfig/glib-2.0.pc
glib-2.0.pc.txt

and CMake args

CMAKE_ARGS="-DBUILD_SHARED_LIBS=true \ ...

So, Now, I can start debug.
I will report after fixed problem.

but still need help ...

[derselbst]

The way you keep posting here makes it impossible to provide any assistance. You seem to be struggling on various frontiers, though, which all seem to arise from your specific toolchain and usage of fluidsynth. However, this is no place for just braindumping your issues. Even if you presented a "solution" here, I doubt it would be helpful to anybody, because given those various code snippets, it is not even possible to comprehend what your actual problem is. Therefore, I'm closing this.