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derselbst 2018-06-24 13:01:31 +02:00
parent 90c2d76709
commit 9382edabd5
129 changed files with 33394 additions and 27137 deletions
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190
doc/fluidsynth_fx.c
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@ -19,9 +19,10 @@
/* The structure with the effects data. This example simply applies a
* linear gain the to synthesizer output. */
struct fx_data_t {
fluid_synth_t* synth;
float gain;
struct fx_data_t
{
fluid_synth_t *synth;
float gain;
} fx_data_t;
/* This function implements the callback function of the audio driver
@ -37,103 +38,120 @@ struct fx_data_t {
* audio drivers currently handles audio input. Either 'nin' will be
* zero, or the buffers will be filled with zero samples.
*/
int fx_function(void* data, int len,
int nin, float** in,
int nout, float** out)
int fx_function(void *data, int len,
int nin, float **in,
int nout, float **out)
{
struct fx_data_t* fx_data = (struct fx_data_t*) data;
int i, k;
float* out_i;
struct fx_data_t *fx_data = (struct fx_data_t *) data;
int i, k;
float *out_i;
/* Call the synthesizer to fill the output buffers with its
* audio output. */
if (fluid_synth_process(fx_data->synth, len, nin, in, nout, out) != 0) {
/* Some error occured. Very unlikely to happen, though. */
return -1;
}
/* Call the synthesizer to fill the output buffers with its
* audio output. */
if(fluid_synth_process(fx_data->synth, len, nin, in, nout, out) != 0)
{
/* Some error occured. Very unlikely to happen, though. */
return -1;
}
/* Apply your effects here. In this example, the gain is
* applied to all the output buffers. */
for (i = 0; i < nout; i++) {
out_i = out[i];
for (k = 0; k < len; k++) {
out_i[k] *= fx_data->gain;
}
}
/* Apply your effects here. In this example, the gain is
* applied to all the output buffers. */
for(i = 0; i < nout; i++)
{
out_i = out[i];
return 0;
for(k = 0; k < len; k++)
{
out_i[k] *= fx_data->gain;
}
}
return 0;
}
int main(int argc, char** argv)
int main(int argc, char **argv)
{
fluid_settings_t* settings;
fluid_synth_t* synth = NULL;
fluid_audio_driver_t* adriver = NULL;
int err = 0;
struct fx_data_t fx_data;
fluid_settings_t *settings;
fluid_synth_t *synth = NULL;
fluid_audio_driver_t *adriver = NULL;
int err = 0;
struct fx_data_t fx_data;
if (argc != 3) {
fprintf(stderr, "Usage: fluidsynth_simple [soundfont] [gain]\n");
return 1;
}
if(argc != 3)
{
fprintf(stderr, "Usage: fluidsynth_simple [soundfont] [gain]\n");
return 1;
}
/* Create the settings object. This example uses the default
* values for the settings. */
settings = new_fluid_settings();
if (settings == NULL) {
fprintf(stderr, "Failed to create the settings\n");
err = 2;
goto cleanup;
}
/* Create the synthesizer */
synth = new_fluid_synth(settings);
if (synth == NULL) {
fprintf(stderr, "Failed to create the synthesizer\n");
err = 3;
goto cleanup;
}
/* Create the settings object. This example uses the default
* values for the settings. */
settings = new_fluid_settings();
/* Load the soundfont */
if (fluid_synth_sfload(synth, argv[1], 1) == -1) {
fprintf(stderr, "Failed to load the SoundFont\n");
err = 4;
goto cleanup;
}
if(settings == NULL)
{
fprintf(stderr, "Failed to create the settings\n");
err = 2;
goto cleanup;
}
/* Fill in the data of the effects unit */
fx_data.synth = synth;
fx_data.gain = atof(argv[2]);
/* Create the synthesizer */
synth = new_fluid_synth(settings);
/* Create the audio driver. As soon as the audio driver is
* created, the synthesizer can be played. */
adriver = new_fluid_audio_driver2(settings, fx_function, (void*) &fx_data);
if (adriver == NULL) {
fprintf(stderr, "Failed to create the audio driver\n");
err = 5;
goto cleanup;
}
if(synth == NULL)
{
fprintf(stderr, "Failed to create the synthesizer\n");
err = 3;
goto cleanup;
}
/* Play a note */
fluid_synth_noteon(synth, 0, 60, 100);
/* Load the soundfont */
if(fluid_synth_sfload(synth, argv[1], 1) == -1)
{
fprintf(stderr, "Failed to load the SoundFont\n");
err = 4;
goto cleanup;
}
printf("Press \"Enter\" to stop: ");
fgetc(stdin);
printf("done\n");
/* Fill in the data of the effects unit */
fx_data.synth = synth;
fx_data.gain = atof(argv[2]);
cleanup:
if (adriver) {
delete_fluid_audio_driver(adriver);
}
if (synth) {
delete_fluid_synth(synth);
}
if (settings) {
delete_fluid_settings(settings);
}
return err;
/* Create the audio driver. As soon as the audio driver is
* created, the synthesizer can be played. */
adriver = new_fluid_audio_driver2(settings, fx_function, (void *) &fx_data);
if(adriver == NULL)
{
fprintf(stderr, "Failed to create the audio driver\n");
err = 5;
goto cleanup;
}
/* Play a note */
fluid_synth_noteon(synth, 0, 60, 100);
printf("Press \"Enter\" to stop: ");
fgetc(stdin);
printf("done\n");
cleanup:
if(adriver)
{
delete_fluid_audio_driver(adriver);
}
if(synth)
{
delete_fluid_synth(synth);
}
if(settings)
{
delete_fluid_settings(settings);
}
return err;
}