audio_core/lle: implement PipeWrite

This commit is contained in:
Weiyi Wang 2018-12-06 07:42:07 -05:00
parent c9736b3300
commit e40efbf37b
2 changed files with 93 additions and 0 deletions

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@ -3,17 +3,105 @@
// Refer to the license.txt file included.
#include "audio_core/lle/lle.h"
#include "common/assert.h"
#include "common/swap.h"
#include "teakra/teakra.h"
namespace AudioCore {
struct PipeStatus {
u16_le waddress;
u16_le bsize;
u16_le read_bptr;
u16_le write_bptr;
u8 slot_index;
u8 flags;
};
static_assert(sizeof(PipeStatus) == 10);
enum class PipeDirection : u8 {
DSPtoCPU = 0,
CPUtoDSP = 1,
};
static u8 PipeIndexToSlotIndex(u8 pipe_index, PipeDirection direction) {
return (pipe_index << 1) + (u8)direction;
}
struct DspLle::Impl final {
Teakra::Teakra teakra;
u16 pipe_base_waddr = 0;
static constexpr unsigned TeakraSlice = 20000;
void RunTeakraSlice() {
teakra.Run(TeakraSlice);
}
u8* GetDspDataPointer(u32 baddr) {
auto& memory = teakra.GetDspMemory();
return &memory[0x40000 + baddr];
}
PipeStatus GetPipeStatus(u8 pipe_index, PipeDirection direction) {
u8 slot_index = PipeIndexToSlotIndex(pipe_index, direction);
PipeStatus pipe_status;
std::memcpy(&pipe_status,
GetDspDataPointer(pipe_base_waddr * 2 + slot_index * sizeof(PipeStatus)),
sizeof(PipeStatus));
ASSERT(pipe_status.slot_index == slot_index);
return pipe_status;
}
void UpdatePipeStatus(const PipeStatus& pipe_status) {
u8 slot_index = pipe_status.slot_index;
u8* status_address =
GetDspDataPointer(pipe_base_waddr * 2 + slot_index * sizeof(PipeStatus));
if (slot_index % 2 == 0) {
std::memcpy(status_address + 4, &pipe_status.read_bptr, sizeof(u16));
} else {
std::memcpy(status_address + 6, &pipe_status.write_bptr, sizeof(u16));
}
}
void WritePipe(u8 pipe_index, const std::vector<u8>& data) {
PipeStatus pipe_status = GetPipeStatus(pipe_index, PipeDirection::CPUtoDSP);
bool need_update = false;
const u8* buffer_ptr = data.data();
u16 bsize = (u16)data.size();
while (bsize != 0) {
u16 x = pipe_status.read_bptr ^ pipe_status.write_bptr;
ASSERT_MSG(x != 0x8000, "Pipe is Full");
u16 write_bend;
if (x > 0x8000)
write_bend = pipe_status.read_bptr & 0x7FFF;
else
write_bend = pipe_status.bsize;
u16 write_bbegin = pipe_status.write_bptr & 0x7FFF;
ASSERT_MSG(write_bend > write_bbegin,
"Pipe is in inconsistent state: end {:04X} <= begin {:04X}, size {:04X}",
write_bend, write_bbegin, pipe_status.bsize);
u16 write_bsize = std::min<u16>(bsize, write_bend - write_bbegin);
std::memcpy(GetDspDataPointer(pipe_status.waddress * 2 + write_bbegin), buffer_ptr,
write_bsize);
buffer_ptr += write_bsize;
pipe_status.write_bptr += write_bsize;
bsize -= write_bsize;
ASSERT_MSG((pipe_status.write_bptr & 0x7FFF) <= pipe_status.bsize,
"Pipe is in inconsistent state: write > size");
if ((pipe_status.write_bptr & 0x7FFF) == pipe_status.bsize) {
pipe_status.write_bptr &= 0x8000;
pipe_status.write_bptr ^= 0x8000;
}
need_update = true;
}
if (need_update) {
UpdatePipeStatus(pipe_status);
while (!teakra.SendDataIsEmpty(2))
RunTeakraSlice();
teakra.SendData(2, pipe_status.slot_index);
}
}
};
u16 DspLle::RecvData(u32 register_number) {
@ -31,6 +119,10 @@ void DspLle::SetSemaphore(u16 semaphore_value) {
impl->teakra.SetSemaphore(semaphore_value);
}
void DspLle::PipeWrite(DspPipe pipe_number, const std::vector<u8>& buffer) {
impl->WritePipe(static_cast<u8>(pipe_number), buffer);
}
DspLle::DspLle() : impl(std::make_unique<Impl>()) {}
DspLle::~DspLle() = default;

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@ -16,6 +16,7 @@ public:
u16 RecvData(u32 register_number) override;
bool RecvDataIsReady(u32 register_number) const override;
void SetSemaphore(u16 semaphore_value) override;
void PipeWrite(DspPipe pipe_number, const std::vector<u8>& buffer) override;
private:
struct Impl;