Skip to content

M
miniaudio
Commit cc685b88 authored by David Reid's avatar David Reid
Browse files
Options

Experimental optimzations to mono/stereo channel conversion.

parent a04780f8
Hide whitespace changes
Inline Side-by-side
Showing with 286 additions and 18 deletions
miniaudio.h
View file @ cc685b88
......@@ -862,12 +862,14 @@ typedef struct
struct ma_channel_router
{
ma_channel_router_config config;
ma_bool32 isPassthrough : 1;
ma_bool32 isSimpleShuffle : 1;
ma_bool32 useSSE2 : 1;
ma_bool32 useAVX2 : 1;
ma_bool32 useAVX512 : 1;
ma_bool32 useNEON : 1;
ma_bool32 isPassthrough : 1;
ma_bool32 isSimpleShuffle : 1;
ma_bool32 isSimpleMonoExpansion : 1;
ma_bool32 isStereoToMono : 1;
ma_bool32 useSSE2 : 1;
ma_bool32 useAVX2 : 1;
ma_bool32 useAVX512 : 1;
ma_bool32 useNEON : 1;
ma_uint8 shuffleTable[MA_MAX_CHANNELS];
};
......@@ -29605,6 +29607,31 @@ ma_result ma_channel_router_init(const ma_channel_router_config* pConfig, ma_cha
}
}
/*
We can use a simple case for expanding the mono channel. This will when expanding a mono input into any output so long
as no LFE is present in the output.
*/
if (!pRouter->isPassthrough) {
if (pRouter->config.channelsIn == 1 && pRouter->config.channelMapIn[0] == MA_CHANNEL_MONO) {
/* Optimal case if no LFE is in the output channel map. */
pRouter->isSimpleMonoExpansion = MA_TRUE;
if (ma_channel_map_contains_channel_position(pRouter->config.channelsOut, pRouter->config.channelMapOut, MA_CHANNEL_LFE)) {
pRouter->isSimpleMonoExpansion = MA_FALSE;
}
}
}
/* Another optimized case is stereo to mono. */
if (!pRouter->isPassthrough) {
if (pRouter->config.channelsOut == 1 && pRouter->config.channelMapOut[0] == MA_CHANNEL_MONO && pRouter->config.channelsIn == 2) {
/* Optimal case if no LFE is in the input channel map. */
pRouter->isStereoToMono = MA_TRUE;
if (ma_channel_map_contains_channel_position(pRouter->config.channelsIn, pRouter->config.channelMapIn, MA_CHANNEL_LFE)) {
pRouter->isStereoToMono = MA_FALSE;
}
}
}
/*
Here is where we do a bit of pre-processing to know how each channel should be combined to make up the output. Rules:
......@@ -29824,6 +29851,31 @@ void ma_channel_router__do_routing(ma_channel_router* pRouter, ma_uint64 frameCo
iChannelOut = pRouter->shuffleTable[iChannelIn];
ma_copy_memory_64(ppSamplesOut[iChannelOut], ppSamplesIn[iChannelIn], frameCount * sizeof(float));
}
} else if (pRouter->isSimpleMonoExpansion) {
/* Simple case for expanding from mono. */
if (pRouter->config.channelsOut == 2) {
ma_uint64 iFrame;
for (iFrame = 0; iFrame < frameCount; ++iFrame) {
ppSamplesOut[0][iFrame] = ppSamplesIn[0][iFrame];
ppSamplesOut[1][iFrame] = ppSamplesIn[0][iFrame];
}
} else {
for (iChannelOut = 0; iChannelOut < pRouter->config.channelsOut; ++iChannelOut) {
ma_uint64 iFrame;
for (iFrame = 0; iFrame < frameCount; ++iFrame) {
ppSamplesOut[iChannelOut][iFrame] = ppSamplesIn[0][iFrame];
}
}
}
} else if (pRouter->isStereoToMono) {
/* Simple case for going from stereo to mono. */
ma_assert(pRouter->config.channelsIn == 2);
ma_assert(pRouter->config.channelsOut == 1);
ma_uint64 iFrame;
for (iFrame = 0; iFrame < frameCount; ++iFrame) {
ppSamplesOut[0][iFrame] = (ppSamplesIn[0][iFrame] + ppSamplesIn[1][iFrame]) * 0.5f;
}
} else {
/* This is the more complicated case. Each of the output channels is accumulated with 0 or more input channels. */
tests/ma_test_0.c
View file @ cc685b88
......@@ -1672,6 +1672,222 @@ int do_channel_routing_tests()
}
}
printf("Simple Mono Expansion (Mono -> Stereo)... ");
{
// The simple mono expansion case will be activated when a mono channel map is converted to anything without an LFE.
ma_channel_router_config routerConfig;
ma_zero_object(&routerConfig);
routerConfig.onReadDeinterleaved = channel_router_callback__passthrough_test;
routerConfig.pUserData = NULL;
routerConfig.mixingMode = ma_channel_mix_mode_planar_blend;
routerConfig.channelsIn = 1;
routerConfig.channelsOut = 2;
routerConfig.noSSE2 = MA_TRUE;
routerConfig.noAVX2 = MA_TRUE;
routerConfig.noAVX512 = MA_TRUE;
routerConfig.noNEON = MA_TRUE;
ma_get_standard_channel_map(ma_standard_channel_map_microsoft, routerConfig.channelsIn, routerConfig.channelMapIn);
ma_get_standard_channel_map(ma_standard_channel_map_microsoft, routerConfig.channelsOut, routerConfig.channelMapOut);
ma_channel_router router;
ma_result result = ma_channel_router_init(&routerConfig, &router);
if (result == MA_SUCCESS) {
if (router.isPassthrough) {
printf("Router incorrectly configured as a passthrough.\n");
hasError = MA_TRUE;
}
if (router.isSimpleShuffle) {
printf("Router incorrectly configured as a simple shuffle.\n");
hasError = MA_TRUE;
}
if (!router.isSimpleMonoExpansion) {
printf("Router not configured as simple mono expansion.\n");
hasError = MA_TRUE;
}
// Expecting the weights to all be equal to 1 for each channel.
for (ma_uint32 iChannelIn = 0; iChannelIn < routerConfig.channelsIn; ++iChannelIn) {
for (ma_uint32 iChannelOut = 0; iChannelOut < routerConfig.channelsOut; ++iChannelOut) {
float expectedWeight = 1;
if (router.config.weights[iChannelIn][iChannelOut] != expectedWeight) {
printf("Failed. Channel weight incorrect: %f\n", expectedWeight);
hasError = MA_TRUE;
}
}
}
} else {
printf("Failed to init router.\n");
hasError = MA_TRUE;
}
// Here is where we check that the shuffle optimization works correctly. What we do is compare the output of the shuffle
// optimization with the non-shuffle output. We don't use a real sound here, but instead use values that makes it easier
// for us to check results. Each channel is given a value equal to it's index, plus 1.
float testData[MA_MAX_CHANNELS][100];
float* ppTestData[MA_MAX_CHANNELS];
for (ma_uint32 iChannel = 0; iChannel < routerConfig.channelsIn; ++iChannel) {
ppTestData[iChannel] = testData[iChannel];
for (ma_uint32 iFrame = 0; iFrame < 100; ++iFrame) {
ppTestData[iChannel][iFrame] = (float)(iChannel + 1);
}
}
routerConfig.pUserData = ppTestData;
ma_channel_router_init(&routerConfig, &router);
float outputA[MA_MAX_CHANNELS][100];
float outputB[MA_MAX_CHANNELS][100];
float* ppOutputA[MA_MAX_CHANNELS];
float* ppOutputB[MA_MAX_CHANNELS];
for (ma_uint32 iChannel = 0; iChannel < routerConfig.channelsOut; ++iChannel) {
ppOutputA[iChannel] = outputA[iChannel];
ppOutputB[iChannel] = outputB[iChannel];
}
// With optimizations.
ma_uint64 framesRead = ma_channel_router_read_deinterleaved(&router, 100, (void**)ppOutputA, router.config.pUserData);
if (framesRead != 100) {
printf("Returned frame count for optimized incorrect.");
hasError = MA_TRUE;
}
// Without optimizations.
router.isPassthrough = MA_FALSE;
router.isSimpleShuffle = MA_FALSE;
framesRead = ma_channel_router_read_deinterleaved(&router, 100, (void**)ppOutputB, router.config.pUserData);
if (framesRead != 100) {
printf("Returned frame count for unoptimized path incorrect.");
hasError = MA_TRUE;
}
// Compare.
for (ma_uint32 iChannel = 0; iChannel < routerConfig.channelsOut; ++iChannel) {
for (ma_uint32 iFrame = 0; iFrame < 100; ++iFrame) {
if (ppOutputA[iChannel][iFrame] != ppOutputB[iChannel][iFrame]) {
printf("Sample incorrect [%d][%d]\n", iChannel, iFrame);
hasError = MA_TRUE;
}
}
}
if (!hasError) {
printf("PASSED\n");
}
}
printf("Simple Stereo to Mono... ");
{
// The simple mono expansion case will be activated when a mono channel map is converted to anything without an LFE.
ma_channel_router_config routerConfig;
ma_zero_object(&routerConfig);
routerConfig.onReadDeinterleaved = channel_router_callback__passthrough_test;
routerConfig.pUserData = NULL;
routerConfig.mixingMode = ma_channel_mix_mode_planar_blend;
routerConfig.channelsIn = 2;
routerConfig.channelsOut = 1;
routerConfig.noSSE2 = MA_TRUE;
routerConfig.noAVX2 = MA_TRUE;
routerConfig.noAVX512 = MA_TRUE;
routerConfig.noNEON = MA_TRUE;
ma_get_standard_channel_map(ma_standard_channel_map_microsoft, routerConfig.channelsIn, routerConfig.channelMapIn);
ma_get_standard_channel_map(ma_standard_channel_map_microsoft, routerConfig.channelsOut, routerConfig.channelMapOut);
ma_channel_router router;
ma_result result = ma_channel_router_init(&routerConfig, &router);
if (result == MA_SUCCESS) {
if (router.isPassthrough) {
printf("Router incorrectly configured as a passthrough.\n");
hasError = MA_TRUE;
}
if (router.isSimpleShuffle) {
printf("Router incorrectly configured as a simple shuffle.\n");
hasError = MA_TRUE;
}
if (router.isSimpleMonoExpansion) {
printf("Router incorrectly configured as simple mono expansion.\n");
hasError = MA_TRUE;
}
if (!router.isStereoToMono) {
printf("Router not configured as stereo to mono.\n");
hasError = MA_TRUE;
}
// Expecting the weights to all be equal to 1 for each channel.
for (ma_uint32 iChannelIn = 0; iChannelIn < routerConfig.channelsIn; ++iChannelIn) {
for (ma_uint32 iChannelOut = 0; iChannelOut < routerConfig.channelsOut; ++iChannelOut) {
float expectedWeight = 0.5f;
if (router.config.weights[iChannelIn][iChannelOut] != expectedWeight) {
printf("Failed. Channel weight incorrect: %f\n", expectedWeight);
hasError = MA_TRUE;
}
}
}
} else {
printf("Failed to init router.\n");
hasError = MA_TRUE;
}
// Here is where we check that the shuffle optimization works correctly. What we do is compare the output of the shuffle
// optimization with the non-shuffle output. We don't use a real sound here, but instead use values that makes it easier
// for us to check results. Each channel is given a value equal to it's index, plus 1.
float testData[MA_MAX_CHANNELS][100];
float* ppTestData[MA_MAX_CHANNELS];
for (ma_uint32 iChannel = 0; iChannel < routerConfig.channelsIn; ++iChannel) {
ppTestData[iChannel] = testData[iChannel];
for (ma_uint32 iFrame = 0; iFrame < 100; ++iFrame) {
ppTestData[iChannel][iFrame] = (float)(iChannel + 1);
}
}
routerConfig.pUserData = ppTestData;
ma_channel_router_init(&routerConfig, &router);
float outputA[MA_MAX_CHANNELS][100];
float outputB[MA_MAX_CHANNELS][100];
float* ppOutputA[MA_MAX_CHANNELS];
float* ppOutputB[MA_MAX_CHANNELS];
for (ma_uint32 iChannel = 0; iChannel < routerConfig.channelsOut; ++iChannel) {
ppOutputA[iChannel] = outputA[iChannel];
ppOutputB[iChannel] = outputB[iChannel];
}
// With optimizations.
ma_uint64 framesRead = ma_channel_router_read_deinterleaved(&router, 100, (void**)ppOutputA, router.config.pUserData);
if (framesRead != 100) {
printf("Returned frame count for optimized incorrect.");
hasError = MA_TRUE;
}
// Without optimizations.
router.isPassthrough = MA_FALSE;
router.isSimpleShuffle = MA_FALSE;
framesRead = ma_channel_router_read_deinterleaved(&router, 100, (void**)ppOutputB, router.config.pUserData);
if (framesRead != 100) {
printf("Returned frame count for unoptimized path incorrect.");
hasError = MA_TRUE;
}
// Compare.
for (ma_uint32 iChannel = 0; iChannel < routerConfig.channelsOut; ++iChannel) {
for (ma_uint32 iFrame = 0; iFrame < 100; ++iFrame) {
if (ppOutputA[iChannel][iFrame] != ppOutputB[iChannel][iFrame]) {
printf("Sample incorrect [%d][%d]\n", iChannel, iFrame);
hasError = MA_TRUE;
}
}
}
if (!hasError) {
printf("PASSED\n");
}
}
printf("Simple Conversion (Stereo -> 5.1)... ");
{
// This tests takes a Stereo to 5.1 conversion using the simple mixing mode. We should expect 0 and 1 (front/left, front/right) to have
......
tests/ma_test_0.vcxproj
View file @ cc685b88
......@@ -295,12 +295,12 @@
<ExcludedFromBuild Condition="'$(Configuration)|$(Platform)'=='Release|x64'">true</ExcludedFromBuild>
</ClCompile>
<ClCompile Include="..\examples\simple_loopback.c">
<ExcludedFromBuild Condition="'$(Configuration)|$(Platform)'=='Debug|Win32'">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>
<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="..\examples\simple_mixing.c">
<ExcludedFromBuild Condition="'$(Configuration)|$(Platform)'=='Debug|Win32'">true</ExcludedFromBuild>
......@@ -383,12 +383,12 @@
<ExcludedFromBuild Condition="'$(Configuration)|$(Platform)'=='Release|x64'">true</ExcludedFromBuild>
</ClCompile>
<ClCompile Include="ma_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>
<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)'=='Release|ARM'">false</ExcludedFromBuild>
<ExcludedFromBuild Condition="'$(Configuration)|$(Platform)'=='Debug|x64'">false</ExcludedFromBuild>
<ExcludedFromBuild Condition="'$(Configuration)|$(Platform)'=='Release|x64'">false</ExcludedFromBuild>
</ClCompile>
<ClCompile Include="ma_test_0.cpp">
<ExcludedFromBuild Condition="'$(Configuration)|$(Platform)'=='Debug|Win32'">true</ExcludedFromBuild>
......
Markdown is supported
0% or
You are about to add 0 people to the discussion. Proceed with caution.
Finish editing this message first!
Please register or to comment