1 files changed, 134 insertions, 0 deletions
diff --git a/examples/test.c b/examples/test.c
new file mode 100644
index 0000000..05c5114
--- /dev/null
+++ b/examples/test.c
@@ -0,0 +1,134 @@
+#include "mmband/api/adsr.h"
+#include <stdio.h>
+#include <stdlib.h>
+
+#include <portaudio.h>
+#include <mmband/api/instrument.h>
+
+#define SAMPLE_RATE 44100
+#define FRAMES_PER_BUFFER 512
+
+// TODO: make adsr depend on sample rate
+
+int main (void) {
+    PaStream *stream;
+    PaError err = Pa_Initialize();
+    if (err != paNoError) {
+        printf("PortAudio error: %s\n", Pa_GetErrorText(err));
+        return 1;
+    }
+
+    PaStreamParameters output_params;
+    output_params.device = Pa_GetDefaultOutputDevice();
+    output_params.channelCount = 2;
+    output_params.sampleFormat = paFloat32;
+    output_params.suggestedLatency = Pa_GetDeviceInfo(output_params.device)->defaultHighInputLatency;
+    output_params.hostApiSpecificStreamInfo = NULL;
+
+    printf("Opening stream.\n");
+    err = Pa_OpenStream(
+            &stream,
+            NULL,
+            &output_params,
+            SAMPLE_RATE,
+            FRAMES_PER_BUFFER,
+            paClipOff,
+            NULL,
+            NULL
+    );
+    if (err != paNoError) {
+        printf("PortAudio error: %s\n", Pa_GetErrorText(err));
+        return 1;
+    }
+
+    instrument_ref instrument = ins_new();
+
+    ins_set_carrier(instrument, OSC_SINE);
+    ins_set_modulator(instrument, OSC_SINE);
+    ins_set_carrier_amplitude(instrument, 0.25);
+    ins_set_modulator_amplitude(instrument, 0.25);
+    ins_set_frequency_mult(instrument, 3.0);
+
+    adsr_ref adsr = adsr_new();
+
+    adsr_set_attack(adsr, 0.2);
+    adsr_set_decay(adsr, 0.2);
+    adsr_set_sustain(adsr, 0.85);
+    adsr_set_release(adsr, 0.5);
+    
+    int switch_frames = (60.0 / 120.0) * SAMPLE_RATE;
+    int iteration = 0;
+    int state = 0;
+
+    printf("Starting stream.\n");
+    err = Pa_StartStream(stream);
+    if (err != paNoError) {
+        printf("PortAudio error: %s\n", Pa_GetErrorText(err));
+        return 1;
+    }
+
+    ins_set_frequency(instrument, 246.9);
+    for (int i = 0; i < (60 * SAMPLE_RATE) / FRAMES_PER_BUFFER; ++i) {
+        float buffer[FRAMES_PER_BUFFER][2];
+        for (int j = 0; j < FRAMES_PER_BUFFER; j++) {
+            iteration++;
+            
+            if (iteration >= switch_frames) {
+                switch (state) {
+                    case 0:
+                        ins_set_frequency(instrument, 329.6);
+                        //adsr_reset(adsr);
+                        state++;
+                        break;
+                    case 1:
+                        ins_set_frequency(instrument, 370.0);
+                        //adsr_reset(adsr);
+                        state++;
+                        break;
+                    case 2:
+                        ins_set_frequency(instrument, 440.0);
+                        //adsr_reset(adsr);
+                        state++;
+                        break;
+                    case 3:
+                        ins_set_frequency(instrument, 370.0);
+                        //adsr_reset(adsr);
+                        state++;
+                        break;
+                    case 4:
+                        ins_set_frequency(instrument, 329.6);
+                        //adsr_reset(adsr);
+                        state++;
+                        break;
+                    default:
+                        ins_set_frequency(instrument, 246.9);
+                        //adsr_reset(adsr);
+                        state = 0;
+                        break; 
+                }
+
+                iteration = 0;
+            }
+
+            //float env = adsr_tick(adsr, SAMPLE_RATE);
+            float ins = ins_tick(instrument, SAMPLE_RATE);
+            buffer[j][0] = ins;// * env;
+            buffer[j][1] = ins;// * env;
+        }
+
+        err = Pa_WriteStream(stream, buffer, FRAMES_PER_BUFFER);
+        if (err != paNoError) {
+            printf("PortAudio error: %s\n", Pa_GetErrorText(err));
+            return 1;
+        }
+    }
+
+    Pa_StopStream(stream);
+    Pa_CloseStream(stream);
+
+    adsr_free(adsr);
+    ins_free(instrument);
+
+    Pa_Terminate();
+    return 0;
+}