diff options
Diffstat (limited to 'examples/example2.c')
| -rw-r--r-- | examples/example2.c | 76 |
1 files changed, 0 insertions, 76 deletions
diff --git a/examples/example2.c b/examples/example2.c deleted file mode 100644 index 8518744..0000000 --- a/examples/example2.c +++ /dev/null @@ -1,76 +0,0 @@ -#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;
-}
-
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