Add examples.

examples/simple_capture.c

@@ -0,0 +1,79 @@
+// This example simply captures data from your default microphone until you press Enter, after
+// which it plays back the captured audio.
+
+#define MAL_IMPLEMENTATION
+#include "../mini_al.h"
+
+#include <stdlib.h>
+#include <stdio.h>
+
+
+mal_uint32 capturedSampleCount = 0;
+float* pCapturedSamples = NULL;
+mal_uint32 playbackSample = 0;
+
+void on_recv_frames(mal_device* pDevice, mal_uint32 frameCount, const void* pSamples)
+{
+    mal_uint32 sampleCount = frameCount * pDevice->channels;
+	
+    mal_uint32 newCapturedSampleCount = capturedSampleCount + sampleCount;
+    float* pNewCapturedSamples = (float*)realloc(pCapturedSamples, newCapturedSampleCount * sizeof(float));
+    if (pNewCapturedSamples == NULL) {
+        return;
+    }
+
+    memcpy(pNewCapturedSamples + capturedSampleCount, pSamples, sampleCount * sizeof(float));
+
+    pCapturedSamples = pNewCapturedSamples;
+    capturedSampleCount = newCapturedSampleCount;
+}
+
+mal_uint32 on_send_frames(mal_device* pDevice, mal_uint32 frameCount, void* pSamples)
+{
+    mal_uint32 samplesToRead = frameCount * pDevice->channels;
+    if (samplesToRead > capturedSampleCount-playbackSample) {
+        samplesToRead = capturedSampleCount-playbackSample;
+    }
+
+    if (samplesToRead == 0) {
+        return 0;
+    }
+
+    memcpy(pSamples, pCapturedSamples + playbackSample, samplesToRead * sizeof(float));
+    playbackSample += samplesToRead;
+
+    return samplesToRead / pDevice->channels;
+}
+
+int main()
+{
+    printf("Recording...\n");
+    mal_device captureDevice;
+    if (mal_device_init(&captureDevice, mal_device_type_capture, NULL, mal_format_f32, 2, 48000, 0, 0, NULL)) {
+        printf("Failed to initialize capture device.\n");
+        return -2;
+    }
+    mal_device_set_recv_callback(&captureDevice, on_recv_frames);
+    mal_device_start(&captureDevice);
+
+    printf("Press Enter to stop recording...\n");
+    getchar();
+    mal_device_uninit(&captureDevice);
+    
+    
+
+    printf("Playing...\n");
+    mal_device playbackDevice;
+    if (mal_device_init(&playbackDevice, mal_device_type_playback, NULL, mal_format_f32, 2, 48000, 0, 0, NULL)) {
+        printf("Failed to initialize playback device.\n");
+        return -3;
+    }
+    mal_device_set_send_callback(&playbackDevice, on_send_frames);
+    mal_device_start(&playbackDevice);
+
+    printf("Press Enter to quit...\n");
+	getchar();
+    mal_device_uninit(&playbackDevice);
+
+	return 0;
+}