Added some more soundfonts, general faffery getting their instruments

src/main.cpp

@@ -1,97 +1,126 @@
-/* FluidSynth Simple - An example of using fluidsynth
- *
- * This code is in the public domain.
- *
- * To compile:
- *   gcc -g -O -o fluidsynth_simple fluidsynth_simple.c -lfluidsynth
- *
- * To run
- *   fluidsynth_simple soundfont
- *
- * [Peter Hanappe]
- */
+/*
+
+  An example of how to use FluidSynth.
+
+  To compile it on Linux:
+  $ gcc -o example example.c `pkg-config fluidsynth --libs`
+
+  To compile it on Windows:
+    ...
 
 
-#include <stdio.h>
+  Author: Peter Hanappe.
+  This code is in the public domain. Use it as you like.
+
+*/
+
 #include <fluidsynth.h>
+#include <iostream>
+
+#if defined(_WIN32)
+#include <windows.h>
+#define sleep(_t) Sleep(_t * 1000)
+#include <process.h>
+#define getpid _getpid
+#else
+#include <stdlib.h>
+#include <unistd.h>
+#endif
 
 int main(int argc, char **argv)
 {
-    fluid_settings_t *settings;
+    fluid_settings_t *settings = NULL;
     fluid_synth_t *synth = NULL;
     fluid_audio_driver_t *adriver = NULL;
-    int err = 0;
+    int sfont_id;
+    int i, key;
 
-    if(argc != 2)
+    fluid_sfont_t* sfont = nullptr;
+    fluid_preset_t* preset = nullptr;
+
+    /* Create the settings. */
+    settings = new_fluid_settings();
+    if(settings == NULL)
     {
-        fprintf(stderr, "Usage: fluidsynth_simple [soundfont]\n");
+        puts("Failed to create the settings!");
+        goto err;
+    }
+
+    /* Change the settings if necessary*/
+
+    /* Create the synthesizer. */
+    synth = new_fluid_synth(settings);
+    if(synth == NULL)
+    {
+        puts("Failed to create the synth!");
+        goto err;
+    }
+
+    /* Load a SoundFont and reset presets (so that new instruments
+     * get used from the SoundFont)
+     * Depending on the size of the SoundFont, this will take some time to complete...
+     */
+    sfont_id = fluid_synth_sfload(synth, argv[1], 1);
+    if(sfont_id == FLUID_FAILED)
+    {
+        puts("Loading the SoundFont failed!");
+        goto err;
+    }
+
+    // Get the SoundFont
+    sfont = fluid_synth_get_sfont_by_id(synth, sfont_id);
+
+    if (!sfont) {
+        std::cerr << "Failed to get SoundFont by ID" << std::endl;
+        delete_fluid_synth(synth);
+        delete_fluid_settings(settings);
         return 1;
     }
 
-    /* Create the settings object. This example uses the default
-     * values for the settings. */
-    settings = new_fluid_settings();
+    // Enumerate the presets (programs) in the SoundFont
 
-    if(settings == NULL)
-    {
-        fprintf(stderr, "Failed to create the settings\n");
-        err = 2;
-        goto cleanup;
+    std::cout << "Programs in SoundFont " << argv[1] << ":" << std::endl;
+    fluid_sfont_iteration_start(sfont);
+    while ((preset = fluid_sfont_iteration_next(sfont)) != nullptr) {
+        std::cout << "Bank: " << fluid_preset_get_banknum(preset)
+                  << ", Program: " << fluid_preset_get_num(preset)
+                  << ", Name: " << fluid_preset_get_name(preset) << std::endl;
     }
 
-    /* Create the synthesizer */
-    synth = new_fluid_synth(settings);
+    fluid_synth_program_select(synth, 0, sfont_id, 0, 0);
 
-    if(synth == NULL)
-    {
-        fprintf(stderr, "Failed to create the synthesizer\n");
-        err = 3;
-        goto cleanup;
-    }
-
-    /* Load the soundfont */
-    if(fluid_synth_sfload(synth, argv[1], 1) == -1)
-    {
-        fprintf(stderr, "Failed to load the SoundFont\n");
-        err = 4;
-        goto cleanup;
-    }
-
-    /* Create the audio driver. As soon as the audio driver is
-     * created, the synthesizer can be played. */
+    /* Create the audio driver. The synthesizer starts playing as soon
+       as the driver is created. */
     adriver = new_fluid_audio_driver(settings, synth);
-
     if(adriver == NULL)
     {
-        fprintf(stderr, "Failed to create the audio driver\n");
-        err = 5;
-        goto cleanup;
+        puts("Failed to create the audio driver!");
+        goto err;
     }
 
-    /* Play a note */
-    fluid_synth_noteon(synth, 0, 60, 100);
+    /* Initialize the random number generator */
+    srand(getpid());
 
-    printf("Press \"Enter\" to stop: ");
-    fgetc(stdin);
-    printf("done\n");
-
-
-cleanup:
-
-    if(adriver)
+    for(i = 0; i < 12; i++)
     {
-        delete_fluid_audio_driver(adriver);
+        /* Generate a random key */
+        key = 60 + (int)(12.0f * rand() / (float) RAND_MAX);
+
+        /* Play a note */
+        fluid_synth_noteon(synth, 0, key, 100);
+
+        /* Sleep for 1 second */
+        sleep(1);
+
+        /* Stop the note */
+        fluid_synth_noteoff(synth, 0, key);
     }
 
-    if(synth)
-    {
-        delete_fluid_synth(synth);
-    }
+err:
+    /* Clean up */
+    delete_fluid_audio_driver(adriver);
+    delete_fluid_synth(synth);
+    delete_fluid_settings(settings);
 
-    if(settings)
-    {
-        delete_fluid_settings(settings);
-    }
-
-    return err;
+    return 0;
 }