1 files changed, 76 insertions, 0 deletions
diff --git a/experiments/soundfont_from_file.c b/experiments/soundfont_from_file.c
new file mode 100644
index 0000000..8518744
--- /dev/null
+++ b/experiments/soundfont_from_file.c
@@ -0,0 +1,76 @@
+#include "../minisdl_audio.h"
+#define TSF_IMPLEMENTATION
+#include "../tsf.h"
+// Holds the global instance pointer
+static tsf* g_TinySoundFont;
+// A Mutex so we don't call note_on/note_off while rendering audio samples
+static SDL_mutex* g_Mutex;
+static void AudioCallback(void* data, Uint8 *stream, int len) {
+        // Render the audio samples in float format
+        int SampleCount = (len / (2 * sizeof(float))); //2 output channels
+        SDL_LockMutex(g_Mutex); //get exclusive lock
+        tsf_render_float(g_TinySoundFont, (float*)stream, SampleCount, 0);
+        SDL_UnlockMutex(g_Mutex);
+}
+int main(int argc, char *argv[]) {
+        int i, Notes[7] = { 48, 50, 52, 53, 55, 57, 59 };
+        // Define the desired audio output format we request
+        SDL_AudioSpec OutputAudioSpec;
+        OutputAudioSpec.freq = 44100;
+        OutputAudioSpec.format = AUDIO_F32;
+        OutputAudioSpec.channels = 2;
+        OutputAudioSpec.samples = 4096;
+        OutputAudioSpec.callback = AudioCallback;
+        // Initialize the audio system
+        if (SDL_AudioInit(TSF_NULL) < 0) {
+                fprintf(stderr, "Could not initialize audio hardware or driver\n");
+                return 1;
+        }
+        // Load the SoundFont from a file
+        g_TinySoundFont = tsf_load_filename("../soundfonts/florestan-subset.sf2");
+        if (!g_TinySoundFont) {
+                fprintf(stderr, "Could not load SoundFont\n");
+                return 1;
+        }
+        // Set the SoundFont rendering output mode
+        tsf_set_output(g_TinySoundFont, TSF_STEREO_INTERLEAVED, OutputAudioSpec.freq, 0);
+        // Create the mutex
+        g_Mutex = SDL_CreateMutex();
+        // Request the desired audio output format
+        if (SDL_OpenAudio(&OutputAudioSpec, TSF_NULL) < 0) {
+                fprintf(stderr, "Could not open the audio hardware or the desired audio output format\n");
+                return 1;
+        }
+        // Start the actual audio playback here
+        // The audio thread will begin to call our AudioCallback function
+        SDL_PauseAudio(0);
+        // Loop through all the presets in the loaded SoundFont
+        for (i = 0; i < tsf_get_presetcount(g_TinySoundFont); i++) {
+                //Get exclusive mutex lock, end the previous note and play a new note
+                printf("Play note %d with preset #%d '%s'\n", Notes[i % 7], i, tsf_get_presetname(g_TinySoundFont, i));
+                SDL_LockMutex(g_Mutex);
+                tsf_note_off(g_TinySoundFont, i - 1, Notes[(i - 1) % 7]);
+                tsf_note_on(g_TinySoundFont, i, Notes[i % 7], 1.0f);
+                SDL_UnlockMutex(g_Mutex);
+                SDL_Delay(1000);
+        }
+        // We could call tsf_close(g_TinySoundFont) and SDL_DestroyMutex(g_Mutex)
+        // here to free the memory and resources but we just let the OS clean up
+        // because the process ends here.
+        return 0;
+}

diff --git a/experiments/soundfont_from_file.c b/experiments/soundfont_from_file.c new file mode 100644 index 0000000..8518744 --- /dev/null +++ b/experiments/soundfont_from_file.c
@@ -0,0 +1,76 @@
	1	#include "../minisdl_audio.h"
	2
	3	#define TSF_IMPLEMENTATION
	4	#include "../tsf.h"
	5
	6	// Holds the global instance pointer
	7	static tsf* g_TinySoundFont;
	8
	9	// A Mutex so we don't call note_on/note_off while rendering audio samples
	10	static SDL_mutex* g_Mutex;
	11
	12	static void AudioCallback(void* data, Uint8 *stream, int len) {
	13	// Render the audio samples in float format
	14	int SampleCount = (len / (2 * sizeof(float))); //2 output channels
	15	SDL_LockMutex(g_Mutex); //get exclusive lock
	16	tsf_render_float(g_TinySoundFont, (float*)stream, SampleCount, 0);
	17	SDL_UnlockMutex(g_Mutex);
	18	}
	19
	20	int main(int argc, char *argv[]) {
	21	int i, Notes[7] = { 48, 50, 52, 53, 55, 57, 59 };
	22
	23	// Define the desired audio output format we request
	24	SDL_AudioSpec OutputAudioSpec;
	25	OutputAudioSpec.freq = 44100;
	26	OutputAudioSpec.format = AUDIO_F32;
	27	OutputAudioSpec.channels = 2;
	28	OutputAudioSpec.samples = 4096;
	29	OutputAudioSpec.callback = AudioCallback;
	30
	31	// Initialize the audio system
	32	if (SDL_AudioInit(TSF_NULL) < 0) {
	33	fprintf(stderr, "Could not initialize audio hardware or driver\n");
	34	return 1;
	35	}
	36
	37	// Load the SoundFont from a file
	38	g_TinySoundFont = tsf_load_filename("../soundfonts/florestan-subset.sf2");
	39	if (!g_TinySoundFont) {
	40	fprintf(stderr, "Could not load SoundFont\n");
	41	return 1;
	42	}
	43
	44	// Set the SoundFont rendering output mode
	45	tsf_set_output(g_TinySoundFont, TSF_STEREO_INTERLEAVED, OutputAudioSpec.freq, 0);
	46
	47	// Create the mutex
	48	g_Mutex = SDL_CreateMutex();
	49
	50	// Request the desired audio output format
	51	if (SDL_OpenAudio(&OutputAudioSpec, TSF_NULL) < 0) {
	52	fprintf(stderr, "Could not open the audio hardware or the desired audio output format\n");
	53	return 1;
	54	}
	55
	56	// Start the actual audio playback here
	57	// The audio thread will begin to call our AudioCallback function
	58	SDL_PauseAudio(0);
	59
	60	// Loop through all the presets in the loaded SoundFont
	61	for (i = 0; i < tsf_get_presetcount(g_TinySoundFont); i++) {
	62	//Get exclusive mutex lock, end the previous note and play a new note
	63	printf("Play note %d with preset #%d '%s'\n", Notes[i % 7], i, tsf_get_presetname(g_TinySoundFont, i));
	64	SDL_LockMutex(g_Mutex);
	65	tsf_note_off(g_TinySoundFont, i - 1, Notes[(i - 1) % 7]);
	66	tsf_note_on(g_TinySoundFont, i, Notes[i % 7], 1.0f);
	67	SDL_UnlockMutex(g_Mutex);
	68	SDL_Delay(1000);
	69	}
	70
	71	// We could call tsf_close(g_TinySoundFont) and SDL_DestroyMutex(g_Mutex)
	72	// here to free the memory and resources but we just let the OS clean up
	73	// because the process ends here.
	74	return 0;
	75	}
	76