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// Copyright 2016 Citra Emulator Project
// Licensed under GPLv2 or any later version
// Refer to the license.txt file included.
#include "audio_core/audio_core.h"
#include "audio_core/hle/dsp.h"
#include "core/core_timing.h"
#include "core/hle/kernel/vm_manager.h"
#include "core/hle/service/dsp_dsp.h"
namespace AudioCore {
// Audio Ticks occur about every 5 miliseconds.
static int tick_event; ///< CoreTiming event
static constexpr u64 audio_frame_ticks = 1310252ull; ///< Units: ARM11 cycles
static void AudioTickCallback(u64 /*userdata*/, int cycles_late) {
if (DSP::HLE::Tick()) {
// HACK: We're not signaling the interrups when they should be, but just firing them all off together.
// It should be only (interrupt_id = 2, channel_id = 2) that's signalled here.
// TODO(merry): Understand when the other interrupts are fired.
DSP_DSP::SignalAllInterrupts();
}
// Reschedule recurrent event
CoreTiming::ScheduleEvent(audio_frame_ticks - cycles_late, tick_event);
}
/// Initialise Audio
void Init() {
DSP::HLE::Init();
tick_event = CoreTiming::RegisterEvent("AudioCore::tick_event", AudioTickCallback);
CoreTiming::ScheduleEvent(audio_frame_ticks, tick_event);
}
/// Add DSP address spaces to Process's address space.
void AddAddressSpace(Kernel::VMManager& address_space) {
auto r0_vma = address_space.MapBackingMemory(DSP::HLE::region0_base, reinterpret_cast<u8*>(&DSP::HLE::g_region0), sizeof(DSP::HLE::SharedMemory), Kernel::MemoryState::IO).MoveFrom();
address_space.Reprotect(r0_vma, Kernel::VMAPermission::ReadWrite);
auto r1_vma = address_space.MapBackingMemory(DSP::HLE::region1_base, reinterpret_cast<u8*>(&DSP::HLE::g_region1), sizeof(DSP::HLE::SharedMemory), Kernel::MemoryState::IO).MoveFrom();
address_space.Reprotect(r1_vma, Kernel::VMAPermission::ReadWrite);
}
/// Shutdown Audio
void Shutdown() {
CoreTiming::UnscheduleEvent(tick_event, 0);
DSP::HLE::Shutdown();
}
} //namespace
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