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This commit is contained in:
James Rowe 2019-03-04 22:47:24 -07:00
parent 5c9e327ff3
commit c669aa8d55
7 changed files with 237 additions and 75 deletions
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113
src/core/hle/service/mic_u.cpp
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@ -46,10 +46,75 @@ constexpr u32 GetSampleRateInHz(SampleRate sample_rate) {
}
}
// The following buffer write rates were found by hardware test on o3ds and n3ds.
// The 3ds writes to the sharedmem roughly every 15 samples
constexpr u64 BufferUpdateRate8180 = BASE_CLOCK_RATE_ARM11 / 511;
constexpr u64 BufferUpdateRate10910 = BASE_CLOCK_RATE_ARM11 / 681;
constexpr u64 BufferUpdateRate16360 = BASE_CLOCK_RATE_ARM11 / 1022;
constexpr u64 BufferUpdateRate32730 = BASE_CLOCK_RATE_ARM11 / 2045;
constexpr u64 GetBufferUpdateRate(SampleRate sample_rate) {
switch (sample_rate) {
case SampleRate::Rate8180:
return BufferUpdateRate8180;
case SampleRate::Rate10910:
return BufferUpdateRate10910;
case SampleRate::Rate16360:
return BufferUpdateRate16360;
case SampleRate::Rate32730:
return BufferUpdateRate32730;
default:
UNREACHABLE();
}
}
// Variables holding the current mic buffer writing state
struct State {
u8* sharedmem_buffer = nullptr;
u32 sharedmem_size = 0;
size_t size = 0;
u32 offset = 0;
u32 initial_offset = 0;
bool looped_buffer = false;
u8 sample_size = 0;
SampleRate sample_rate = SampleRate::Rate16360;
void UpdateOffset() {
// The last 4 bytes of the shared memory contains the latest offset
// so update that as well https://www.3dbrew.org/wiki/MIC_Shared_Memory
std::memcpy(sharedmem_buffer + (sharedmem_size - sizeof(u32)),
reinterpret_cast<u8*>(&offset), sizeof(u32));
}
void WriteSamples(const std::vector<u8>& samples) {
u32 bytes_total_written = 0;
const size_t remaining_space = size - offset;
size_t bytes_to_write = std::min(samples.size(), remaining_space);
// Write as many samples as we can to the buffer.
// TODO if the sample size is 16bit, this could theoretically cut a sample
std::memcpy(sharedmem_buffer + offset, samples.data(), bytes_to_write);
offset += static_cast<u32>(bytes_to_write);
bytes_total_written += static_cast<u32>(bytes_to_write);
// If theres any samples left to write after we looped, go ahead and write them now
if (looped_buffer && samples.size() > bytes_total_written) {
offset = initial_offset;
bytes_to_write = std::min(samples.size() - bytes_total_written, size);
std::memcpy(sharedmem_buffer + offset, samples.data() + bytes_total_written,
bytes_to_write);
offset += static_cast<u32>(bytes_to_write);
}
}
};
struct MIC_U::Impl {
explicit Impl(Core::System& system) {
explicit Impl(Core::System& system) : timing(system.CoreTiming()) {
buffer_full_event =
system.Kernel().CreateEvent(Kernel::ResetType::OneShot, "MIC_U::buffer_full_event");
buffer_write_event = timing.RegisterEvent(
"MIC_U::UpdateBuffer", std::bind(&Impl::UpdateSharedMemBuffer, this,
std::placeholders::_1, std::placeholders::_2));
}
void MapSharedMem(Kernel::HLERequestContext& ctx) {
@ -59,10 +124,10 @@ struct MIC_U::Impl {
if (shared_memory) {
shared_memory->SetName("MIC_U:shared_memory");
state.sharedmem_buffer = shared_memory->GetPointer();
state.sharedmem_size = size;
}
mic->SetBackingMemory(shared_memory->GetPointer(), size);
IPC::RequestBuilder rb = rp.MakeBuilder(1, 0);
rb.Push(RESULT_SUCCESS);
@ -77,6 +142,25 @@ struct MIC_U::Impl {
LOG_TRACE(Service_MIC, "MIC:U UnmapSharedMem called");
}
void UpdateSharedMemBuffer(u64 userdata, s64 cycles_late) {
// If the event was scheduled before the application requested the mic to stop sampling
if (!mic->IsSampling()) {
return;
}
Frontend::Mic::Samples samples = mic->Read();
if (!samples.empty()) {
// write the samples to sharedmem page
state.WriteSamples(samples);
// write the new offset to the last 4 bytes of the buffer
state.UpdateOffset();
}
// schedule next run
timing.ScheduleEvent(GetBufferUpdateRate(state.sample_rate) - cycles_late,
buffer_write_event);
}
void StartSampling(Kernel::HLERequestContext& ctx) {
IPC::RequestParser rp{ctx, 0x03, 5, 0};
@ -86,14 +170,27 @@ struct MIC_U::Impl {
u32 audio_buffer_size = rp.Pop<u32>();
bool audio_buffer_loop = rp.Pop<bool>();
if (mic->IsSampling()) {
LOG_CRITICAL(Service_MIC,
"Application started sampling again before stopping sampling");
mic->StopSampling();
}
auto sign = encoding == Encoding::PCM8Signed || encoding == Encoding::PCM16Signed
? Frontend::Mic::Signedness::Signed
: Frontend::Mic::Signedness::Unsigned;
u8 sample_size = encoding == Encoding::PCM8Signed || encoding == Encoding::PCM8 ? 8 : 16;
state.offset = state.initial_offset = audio_buffer_offset;
state.sample_rate = sample_rate;
state.sample_size = sample_size;
state.looped_buffer = audio_buffer_loop;
state.size = audio_buffer_size;
mic->StartSampling({sign, sample_size, audio_buffer_loop, GetSampleRateInHz(sample_rate),
audio_buffer_offset, audio_buffer_size});
timing.ScheduleEvent(GetBufferUpdateRate(state.sample_rate), buffer_write_event);
IPC::RequestBuilder rb = rp.MakeBuilder(1, 0);
rb.Push(RESULT_SUCCESS);
LOG_TRACE(Service_MIC,
@ -229,14 +326,16 @@ struct MIC_U::Impl {
IPC::RequestBuilder rb = rp.MakeBuilder(1, 0);
rb.Push(RESULT_SUCCESS);
}
Kernel::SharedPtr<Kernel::Event> buffer_full_event =
Core::System::GetInstance().Kernel().CreateEvent(Kernel::ResetType::OneShot,
"MIC_U::buffer_full_event");
Kernel::SharedPtr<Kernel::Event> buffer_full_event;
Core::TimingEventType* buffer_write_event = nullptr;
Kernel::SharedPtr<Kernel::SharedMemory> shared_memory;
u32 client_version = 0;
bool allow_shell_closed = false;
bool clamp = false;
std::shared_ptr<Frontend::Mic::Interface> mic;
Core::Timing& timing;
State state{};
};
void MIC_U::MapSharedMem(Kernel::HLERequestContext& ctx) {
@ -324,7 +423,7 @@ MIC_U::MIC_U(Core::System& system)
{0x00100040, &MIC_U::SetClientVersion, "SetClientVersion"},
};
impl->mic = Frontend::GetCurrentMic();
impl->mic = Frontend::Mic::GetCurrentMic();
RegisterHandlers(functions);
}