Add mal_sine_wave_read_ex().

mini_al.h

@@ -2632,8 +2632,9 @@ typedef struct
     double time;
 } mal_sine_wave;
 
-mal_result mal_sine_wave_init(double amplitude, double period, mal_uint32 sampleRate, mal_sine_wave* pSignWave);
+mal_result mal_sine_wave_init(double amplitude, double period, mal_uint32 sampleRate, mal_sine_wave* pSineWave);
-mal_uint64 mal_sine_wave_read(mal_sine_wave* pSignWave, mal_uint64 count, float* pSamples);
+mal_uint64 mal_sine_wave_read(mal_sine_wave* pSineWave, mal_uint64 count, float* pSamples);
+mal_uint64 mal_sine_wave_read_ex(mal_sine_wave* pSineWave, mal_uint64 frameCount, mal_uint32 channels, mal_stream_layout layout, float** ppFrames);
 
 
 #ifdef __cplusplus
@@ -27354,21 +27355,36 @@ mal_result mal_sine_wave_init(double amplitude, double periodsPerSecond, mal_uin
 }
 
 mal_uint64 mal_sine_wave_read(mal_sine_wave* pSineWave, mal_uint64 count, float* pSamples)
+{
+    return mal_sine_wave_read_ex(pSineWave, count, 1, mal_stream_layout_interleaved, &pSamples);
+}
+
+mal_uint64 mal_sine_wave_read_ex(mal_sine_wave* pSineWave, mal_uint64 frameCount, mal_uint32 channels, mal_stream_layout layout, float** ppFrames)
 {
     if (pSineWave == NULL) {
         return 0;
     }
 
-    if (pSamples != NULL) {
+    if (ppFrames != NULL) {
-        for (mal_uint64 i = 0; i < count; i += 1) {
+        for (mal_uint64 iFrame = 0; iFrame < frameCount; iFrame += 1) {
-            pSamples[i] = (float)(sin(pSineWave->time * pSineWave->periodsPerSecond) * pSineWave->amplitude);
+            float s = (float)(sin(pSineWave->time * pSineWave->periodsPerSecond) * pSineWave->amplitude);
             pSineWave->time += pSineWave->delta;
+
+            if (layout == mal_stream_layout_interleaved) {
+                for (mal_uint32 iChannel = 0; iChannel < channels; iChannel += 1) {
+                    ppFrames[0][iFrame*channels + iChannel] = s;
                 }
             } else {
-        pSineWave->time += pSineWave->delta * count;
+                for (mal_uint32 iChannel = 0; iChannel < channels; iChannel += 1) {
+                    ppFrames[iChannel][iFrame] = s;
+                }
+            }
+        }
+    } else {
+        pSineWave->time += pSineWave->delta * frameCount;
     }
 
-    return count;
+    return frameCount;
 }
 
 
@@ -27387,6 +27403,7 @@ mal_uint64 mal_sine_wave_read(mal_sine_wave* pSineWave, mal_uint64 count, float*
 //     Raspberry Pi experience.
 //   - Fix a bug where an incorrect number of samples is returned from sinc resampling.
 //   - Add support for setting the value to be passed to internal calls to CoInitializeEx().
+//   - WASAPI and WinMM: Stop the device when it is unplugged.
 //
 // v0.8.4 - 2018-08-06
 //   - Add sndio backend for OpenBSD.

tests/mal_unplugging.c

@@ -24,16 +24,14 @@ void on_stop(mal_device* pDevice)
 mal_uint32 on_send(mal_device* pDevice, mal_uint32 frameCount, void* pFramesOut)
 {
     mal_assert(pDevice != NULL);
-    mal_assert(pDevice->channels == 1);
-    (void)pDevice;
 
     //printf("TESTING: %d\n", frameCount);
-    return (mal_uint32)mal_sine_wave_read(&g_sineWave, frameCount, (float*)pFramesOut);
+    return (mal_uint32)mal_sine_wave_read_ex(&g_sineWave, frameCount, pDevice->channels, mal_stream_layout_interleaved, (float**)&pFramesOut);
 }
 
 int main()
 {
-    mal_backend backend = mal_backend_alsa;
+    mal_backend backend = mal_backend_wasapi;
 
     mal_result result = mal_sine_wave_init(0.25f, 400, 48000, &g_sineWave);
     if (result != MAL_SUCCESS) {
@@ -42,7 +40,7 @@ int main()
     }
 
     mal_context_config contextConfig = mal_context_config_init(on_log);
-    mal_device_config deviceConfig = mal_device_config_init_playback(mal_format_f32, 1, 48000, on_send);
+    mal_device_config deviceConfig = mal_device_config_init_playback(mal_format_f32, 0, 48000, on_send);
     deviceConfig.onStopCallback = on_stop;
 
     mal_device device;