ngs2: report voice setup channels from the setup query

Co-authored-by: Phr3d13 <phr3d13@gmail.com>

src/libs/libAudio.cpp

@@ -1162,6 +1162,7 @@ LIB_DEFINE(InitAudio_1_Ngs2) {
 	LIB_FUNC("AbYvTOZ8Pts", Ngs2::Ngs2VoiceRunCommands);
 	LIB_FUNC("-TOuuAQ-buE", Ngs2::Ngs2VoiceGetState);
 	LIB_FUNC("rEh728kXk3w", Ngs2::Ngs2VoiceGetStateFlags);
+	LIB_FUNC("9eic4AmjGVI", Ngs2::Ngs2VoiceQueryInfo);
 	LIB_FUNC("i0VnXM-C9fc", Ngs2::Ngs2SystemRender);
 	LIB_FUNC("l4Q2dWEH6UM", Ngs2::Ngs2SystemSetGrainSamples);
 	LIB_FUNC("hyVLT2VlOYk", Ngs2::Ngs2ParseWaveformData);

src/libs/ngs2.cpp

@@ -2783,6 +2783,25 @@ int KYTY_SYSV_ABI Ngs2VoiceGetStateFlags(uintptr_t voice_handle, uint32_t* state
 	return OK;
 }
 
+int KYTY_SYSV_ABI Ngs2VoiceQueryInfo(uintptr_t voice_handle, uint32_t query_id, void* info,
+                                     size_t info_size) {
+	PRINT_NAME();
+
+	struct SetupInfo {
+		uint32_t channels, flags;
+	};
+	EXIT_NOT_IMPLEMENTED(voice_handle == 0 || info == nullptr);
+	EXIT_NOT_IMPLEMENTED(query_id != 0x4001 || info_size != sizeof(SetupInfo));
+
+	auto* voice = reinterpret_cast<Ngs2VoiceInternal*>(voice_handle);
+
+	Common::LockGuard lock(voice->rack->ngs->mutex);
+
+	*static_cast<SetupInfo*>(info) = {voice->channels, 0};
+
+	return OK;
+}
+
 int KYTY_SYSV_ABI Ngs2SystemLock(uintptr_t system_handle) {
 	PRINT_NAME();
 

src/libs/ngs2.h

@@ -60,6 +60,8 @@ int KYTY_SYSV_ABI Ngs2VoiceRunCommands(uintptr_t voice_handle, const void* comma
 int KYTY_SYSV_ABI Ngs2VoiceGetState(uintptr_t voice_handle, Ngs2VoiceState* state,
                                     size_t state_size);
 int KYTY_SYSV_ABI Ngs2VoiceGetStateFlags(uintptr_t voice_handle, uint32_t* state_flags);
+int KYTY_SYSV_ABI Ngs2VoiceQueryInfo(uintptr_t voice_handle, uint32_t query_id, void* info,
+                                     size_t info_size);
 int KYTY_SYSV_ABI Ngs2SystemRender(uintptr_t system_handle, const Ngs2RenderBufferInfo* buffer_info,
                                    uint32_t num_buffer_info);
 int KYTY_SYSV_ABI Ngs2ParseWaveformData(const void* data, size_t data_size, Ngs2WaveformInfo* info);

tests/Ngs2SamplerTests.cpp

@@ -1158,6 +1158,13 @@ void TestDeferredSamplerSetup() {
 	      "sampler did not play after deferred stream setup");
 }
 
+void TestSetupQuery() {
+	Fixture  f(48000, 2);
+	uint32_t info[2] = {99, 99};
+	Ngs2VoiceQueryInfo(reinterpret_cast<uintptr_t>(&f.voice), 0x4001, info, sizeof(info));
+	Check(info[0] == 2 && info[1] == 0, "setup query did not report the voice channels");
+}
+
 void TestPlayStateBeforeRender() {
 	Fixture       f(48000);
 	const int16_t pcm[] = {8192, -16384};
@@ -1888,6 +1895,7 @@ int main() {
 	TestMonoRateAndRouting();
 	TestMatrixOutputChannels();
 	TestCustomPcmStillPlays();
+	TestSetupQuery();
 	TestPlayStateBeforeRender();
 	TestStatePublication();
 	TestStopThenPlayBeforeRender();