Add a simple profiling test.

tests/mal_profiling.c

 #define MAL_IMPLEMENTATION
 #include "../mini_al.h"
 
+float g_ChannelRouterProfilingOutputBenchmark[8][480000];
+float g_ChannelRouterProfilingOutput[8][480000];
+double g_ChannelRouterTime_Reference = 0;
+double g_ChannelRouterTime_SSE2 = 0;
+double g_ChannelRouterTime_AVX = 0;
+double g_ChannelRouterTime_AVX512 = 0;
+double g_ChannelRouterTime_NEON = 0;
+
+mal_sine_wave sineWave;
+
+mal_bool32 channel_router_test(mal_uint32 channels, mal_uint64 frameCount, float** ppFramesA, float** ppFramesB)
+{
+    for (mal_uint32 iChannel = 0; iChannel < channels; ++iChannel) {
+        for (mal_uint32 iFrame = 0; iFrame < frameCount; ++iFrame) {
+            if (ppFramesA[iChannel][iFrame] != ppFramesB[iChannel][iFrame]) {
+                return MAL_FALSE;
+            }
+        }
+    }
+
+    return MAL_TRUE;
+}
+
+mal_uint32 channel_router_on_read(mal_channel_router* pRouter, mal_uint32 frameCount, void** ppSamplesOut, void* pUserData)
+{
+    (void)pUserData;
+    (void)pRouter;
+
+    float** ppSamplesOutF = (float**)ppSamplesOut;
+
+    for (mal_uint32 iChannel = 0; iChannel < pRouter->config.channelsIn; ++iChannel) {
+        mal_sine_wave_init(1/(iChannel+1), 400, 48000, &sineWave);
+        mal_sine_wave_read(&sineWave, frameCount, ppSamplesOutF[iChannel]);
+    }
+
+    return frameCount;
+}
+
 int do_profiling__channel_routing()
 {
+    mal_result result;
+
+    // When profiling we need to compare against a benchmark to ensure the optimization is implemented correctly. We always
+    // use the reference implementation for our benchmark.
+    mal_uint32 channels = mal_countof(g_ChannelRouterProfilingOutputBenchmark);
+    mal_channel channelMapIn[MAL_MAX_CHANNELS];
+    mal_get_standard_channel_map(mal_standard_channel_map_default, channels, channelMapIn);
+    mal_channel channelMapOut[MAL_MAX_CHANNELS];
+    mal_get_standard_channel_map(mal_standard_channel_map_default, channels, channelMapOut);
+
+    mal_channel_router_config routerConfig = mal_channel_router_config_init(channels, channelMapIn, channels, channelMapOut, mal_channel_mix_mode_planar_blend, channel_router_on_read, NULL);
+
+    mal_channel_router router;
+    result = mal_channel_router_init(&routerConfig, &router);
+    if (result != MAL_SUCCESS) {
+        return -1;
+    }
+
+    // Disable optimizations for our tests.
+    router.isPassthrough = MAL_FALSE;
+    router.isSimpleShuffle = MAL_FALSE;
+    router.useSSE2 = MAL_FALSE;
+    router.useAVX = MAL_FALSE;
+    router.useAVX512 = MAL_FALSE;
+    router.useNEON = MAL_FALSE;
+
+    mal_uint64 framesToRead = mal_countof(g_ChannelRouterProfilingOutputBenchmark[0]);
+
+    // Benchmark
+    void* ppOutBenchmark[8];
+    for (int i = 0; i < 8; ++i) {
+        ppOutBenchmark[i] = (void*)g_ChannelRouterProfilingOutputBenchmark[i];
+    }
+
+    mal_sine_wave_init(1, 400, 48000, &sineWave);
+    mal_uint64 framesRead = mal_channel_router_read_deinterleaved(&router, framesToRead, ppOutBenchmark, NULL);
+    if (framesRead != framesToRead) {
+        printf("Channel Router: An error occurred while reading benchmark data.\n");
+    }
 
+    void* ppOut[8];
+    for (int i = 0; i < 8; ++i) {
+        ppOut[i] = (void*)g_ChannelRouterProfilingOutput[i];
+    }
+
+
+    printf("Channel Routing\n");
+    printf("===============\n");
+
+    // Reference
+    {
+        mal_timer timer;
+        mal_timer_init(&timer);
+        double startTime = mal_timer_get_time_in_seconds(&timer);
+
+        framesRead = mal_channel_router_read_deinterleaved(&router, framesToRead, ppOut, NULL);
+        if (framesRead != framesToRead) {
+            printf("Channel Router: An error occurred while reading reference data.\n");
+        }
+
+        if (!channel_router_test(channels, framesRead, (float**)ppOutBenchmark, (float**)ppOut)) {
+            printf("  [ERROR] ");
+        } else {
+            printf("  [PASSED] ");
+        }
+
+        g_ChannelRouterTime_Reference = mal_timer_get_time_in_seconds(&timer) - startTime;
+        printf("Reference: %.4fms (%.2f%%)\n", g_ChannelRouterTime_Reference*1000, g_ChannelRouterTime_Reference/g_ChannelRouterTime_Reference*100);
+    }
+
+    // SSE2
+    if (mal_has_sse2()) {
+        router.useSSE2 = MAL_TRUE;
+        mal_timer timer;
+        mal_timer_init(&timer);
+        double startTime = mal_timer_get_time_in_seconds(&timer);
+
+        framesRead = mal_channel_router_read_deinterleaved(&router, framesToRead, ppOut, NULL);
+        if (framesRead != framesToRead) {
+            printf("Channel Router: An error occurred while reading SSE2 data.\n");
+        }
+
+        g_ChannelRouterTime_SSE2 = mal_timer_get_time_in_seconds(&timer) - startTime;
+        router.useSSE2 = MAL_FALSE;
+
+        if (!channel_router_test(channels, framesRead, (float**)ppOutBenchmark, (float**)ppOut)) {
+            printf("  [ERROR] ");
+        } else {
+            printf("  [PASSED] ");
+        }
+
+        printf("SSE2: %.4fms (%.2f%%)\n", g_ChannelRouterTime_SSE2*1000, g_ChannelRouterTime_Reference/g_ChannelRouterTime_SSE2*100);
+    }
+
+    // AVX
+    if (mal_has_avx()) {
+        router.useAVX = MAL_TRUE;
+        mal_timer timer;
+        mal_timer_init(&timer);
+        double startTime = mal_timer_get_time_in_seconds(&timer);
+
+        framesRead = mal_channel_router_read_deinterleaved(&router, framesToRead, ppOut, NULL);
+        if (framesRead != framesToRead) {
+            printf("Channel Router: An error occurred while reading AVX data.\n");
+        }
+
+        g_ChannelRouterTime_AVX = mal_timer_get_time_in_seconds(&timer) - startTime;
+        router.useAVX = MAL_FALSE;
+
+        if (!channel_router_test(channels, framesRead, (float**)ppOutBenchmark, (float**)ppOut)) {
+            printf("  [ERROR] ");
+        } else {
+            printf("  [PASSED] ");
+        }
+
+        printf("AVX: %.4fms (%.2f%%)\n", g_ChannelRouterTime_AVX*1000, g_ChannelRouterTime_Reference/g_ChannelRouterTime_AVX*100);
+    }
+
+    return 1;
 }
 
 int main(int argc, char** argv)
@@ -14,5 +170,7 @@ int main(int argc, char** argv)
     // Channel routing.
     do_profiling__channel_routing();
 
+    getchar();
+
     return 0;
 }
\ No newline at end of file

tests/mal_test_0.vcxproj

@@ -259,21 +259,21 @@
   </ItemDefinitionGroup>
   <ItemGroup>
     <ClCompile Include="mal_profiling.c">
-      <ExcludedFromBuild Condition="'$(Configuration)|$(Platform)'=='Debug|Win32'">true</ExcludedFromBuild>
-      <ExcludedFromBuild Condition="'$(Configuration)|$(Platform)'=='Release|Win32'">true</ExcludedFromBuild>
-      <ExcludedFromBuild Condition="'$(Configuration)|$(Platform)'=='Debug|ARM'">true</ExcludedFromBuild>
-      <ExcludedFromBuild Condition="'$(Configuration)|$(Platform)'=='Release|ARM'">true</ExcludedFromBuild>
-      <ExcludedFromBuild Condition="'$(Configuration)|$(Platform)'=='Debug|x64'">true</ExcludedFromBuild>
-      <ExcludedFromBuild Condition="'$(Configuration)|$(Platform)'=='Release|x64'">true</ExcludedFromBuild>
-    </ClCompile>
-    <ClCompile Include="mal_test_0.c">
       <ExcludedFromBuild Condition="'$(Configuration)|$(Platform)'=='Debug|Win32'">false</ExcludedFromBuild>
-      <ExcludedFromBuild Condition="'$(Configuration)|$(Platform)'=='Debug|ARM'">false</ExcludedFromBuild>
       <ExcludedFromBuild Condition="'$(Configuration)|$(Platform)'=='Release|Win32'">false</ExcludedFromBuild>
+      <ExcludedFromBuild Condition="'$(Configuration)|$(Platform)'=='Debug|ARM'">false</ExcludedFromBuild>
       <ExcludedFromBuild Condition="'$(Configuration)|$(Platform)'=='Release|ARM'">false</ExcludedFromBuild>
       <ExcludedFromBuild Condition="'$(Configuration)|$(Platform)'=='Debug|x64'">false</ExcludedFromBuild>
       <ExcludedFromBuild Condition="'$(Configuration)|$(Platform)'=='Release|x64'">false</ExcludedFromBuild>
     </ClCompile>
+    <ClCompile Include="mal_test_0.c">
+      <ExcludedFromBuild Condition="'$(Configuration)|$(Platform)'=='Debug|Win32'">true</ExcludedFromBuild>
+      <ExcludedFromBuild Condition="'$(Configuration)|$(Platform)'=='Debug|ARM'">true</ExcludedFromBuild>
+      <ExcludedFromBuild Condition="'$(Configuration)|$(Platform)'=='Release|Win32'">true</ExcludedFromBuild>
+      <ExcludedFromBuild Condition="'$(Configuration)|$(Platform)'=='Release|ARM'">true</ExcludedFromBuild>
+      <ExcludedFromBuild Condition="'$(Configuration)|$(Platform)'=='Debug|x64'">true</ExcludedFromBuild>
+      <ExcludedFromBuild Condition="'$(Configuration)|$(Platform)'=='Release|x64'">true</ExcludedFromBuild>
+    </ClCompile>
     <ClCompile Include="mal_test_0.cpp">
       <ExcludedFromBuild Condition="'$(Configuration)|$(Platform)'=='Debug|Win32'">true</ExcludedFromBuild>
       <ExcludedFromBuild Condition="'$(Configuration)|$(Platform)'=='Debug|ARM'">true</ExcludedFromBuild>