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/*
* Example of creating a SoundFont from multiple audio samples
*
* Updated on Oct 14, 2010
* Some API changes and additional comments in code.
*
* Updated on Nov 12, 2004
* Now uses more convenient converter functions.
*
* Joshua "Element" Green - Sep 14, 2004
* Use this example as you please (public domain)
*/
#include <stdio.h>
#include <libinstpatch/libinstpatch.h>
int
main(int argc, char *argv[])
{
IpatchSF2 *sf2;
IpatchFileHandle *fhandle;
IpatchSF2File *sffile;
GObject *sample; /* IpatchSF2Sample */
IpatchSF2Inst *inst;
IpatchSF2Preset *preset;
GError *err = NULL;
char *fname, *name;
int i;
if(argc < 2)
{
fprintf(stderr, "Usage: create_sf2 sample1.wav [sample2.wav sample3.aiff ..]\n");
return (1);
}
/* initialize libInstPatch */
ipatch_init();
sf2 = ipatch_sf2_new(); /* ++ ref new SoundFont object */
/* loop over file names (command line args) */
for(i = 1; i < argc; i++)
{
fname = argv[i];
/* ++ identify file type and open handle to file object */
fhandle = ipatch_file_identify_open(fname, &err);
if(!fhandle)
{
fprintf(stderr, "Failed to identify file '%s': %s\n", fname,
ipatch_gerror_message(err));
g_clear_error(&err);
continue;
}
/* try to convert file to a SoundFont sample */
sample = ipatch_convert_object_to_type(G_OBJECT(fhandle->file),
IPATCH_TYPE_SF2_SAMPLE, &err);
if(!sample)
{
fprintf(stderr, "Failed to convert file '%s' to SoundFont sample: %s\n",
fname, ipatch_gerror_message(err));
g_clear_error(&err);
ipatch_file_close(fhandle); /* -- close file */
continue;
}
/* append sample to SoundFont (ensure that its name is unique) */
ipatch_container_add_unique(IPATCH_CONTAINER(sf2), IPATCH_ITEM(sample));
g_object_get(sample, "name", &name, NULL); /* get the sample's name */
/* create new SoundFont instrument (++ ref) */
inst = ipatch_sf2_inst_new();
g_object_set(inst, "name", name, NULL); /* set instrument name */
/* create new instrument zone and link sample to it */
ipatch_sf2_inst_new_zone(inst, IPATCH_SF2_SAMPLE(sample));
g_object_unref(sample); /* -- unref SoundFont sample */
/* append instrument to SoundFont (ensure that its name is unique) */
ipatch_container_add_unique(IPATCH_CONTAINER(sf2), IPATCH_ITEM(inst));
/* create new SoundFont preset (++ ref) */
preset = ipatch_sf2_preset_new();
g_object_set(preset, "name", name, NULL); /* set preset name */
/* create new preset zone and link instrument to it */
ipatch_sf2_preset_new_zone(preset, inst);
g_object_unref(inst); /* -- unref SoundFont instrument */
/* append preset to SoundFont (ensure name/bank/preset # are unique) */
ipatch_container_add_unique(IPATCH_CONTAINER(sf2), IPATCH_ITEM(preset));
g_object_unref(preset);
g_free(name); /* free the name (returned from g_object_get) */
ipatch_file_close(fhandle); /* -- close file */
}
/* create SoundFont file object, set its name and open for writing */
sffile = ipatch_sf2_file_new();
ipatch_file_set_name(IPATCH_FILE(sffile), "output.sf2");
/* Save SoundFont to file using converter system */
if(!ipatch_convert_objects(G_OBJECT(sf2), G_OBJECT(sffile), &err))
{
fprintf(stderr, "Failed to save SoundFont to file: %s\n",
ipatch_gerror_message(err));
g_clear_error(&err);
}
g_object_unref(sffile); /* -- unref SoundFont file */
g_object_unref(sf2); /* -- unref SoundFont object */
return (0); /* we done, yeah! :) */
}
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