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audio_core/lle: implement PipeRead/GetPipeReadableSize

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This commit is contained in:
Weiyi Wang 2018-12-06 07:49:07 -05:00
parent daf23eca2e
commit 5c13eca700
2 changed files with 57 additions and 0 deletions
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55
src/audio_core/lle/lle.cpp
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@ -102,6 +102,53 @@ struct DspLle::Impl final {
teakra.SendData(2, pipe_status.slot_index);
}
}
std::vector<u8> ReadPipe(u8 pipe_index, u16 bsize) {
PipeStatus pipe_status = GetPipeStatus(pipe_index, PipeDirection::DSPtoCPU);
bool need_update = false;
std::vector<u8> data(bsize);
u8* buffer_ptr = data.data();
while (bsize != 0) {
u16 x = pipe_status.read_bptr ^ pipe_status.write_bptr;
ASSERT_MSG(x != 0, "Pipe is empty");
u16 read_bend;
if (x >= 0x8000) {
read_bend = pipe_status.bsize;
} else {
read_bend = pipe_status.write_bptr & 0x7FFF;
}
u16 read_bbegin = pipe_status.read_bptr & 0x7FFF;
ASSERT(read_bend > read_bbegin);
u16 read_bsize = std::min<u16>(bsize, read_bend - read_bbegin);
std::memcpy(buffer_ptr, GetDspDataPointer(pipe_status.waddress * 2 + read_bbegin),
read_bsize);
buffer_ptr += read_bsize;
pipe_status.read_bptr += read_bsize;
bsize -= read_bsize;
ASSERT_MSG((pipe_status.read_bptr & 0x7FFF) <= pipe_status.bsize,
"Pipe is in inconsistent state: read > size");
if ((pipe_status.read_bptr & 0x7FFF) == pipe_status.bsize) {
pipe_status.read_bptr &= 0x8000;
pipe_status.read_bptr ^= 0x8000;
}
need_update = true;
}
if (need_update) {
UpdatePipeStatus(pipe_status);
while (!teakra.SendDataIsEmpty(2))
RunTeakraSlice();
teakra.SendData(2, pipe_status.slot_index);
}
return data;
}
u16 GetPipeReadableSize(u8 pipe_index) {
PipeStatus pipe_status = GetPipeStatus(pipe_index, PipeDirection::DSPtoCPU);
u16 size = pipe_status.write_bptr - pipe_status.read_bptr;
if ((pipe_status.read_bptr ^ pipe_status.write_bptr) >= 0x8000) {
size += pipe_status.bsize;
}
return size & 0x7FFF;
}
};
u16 DspLle::RecvData(u32 register_number) {
@ -119,6 +166,14 @@ void DspLle::SetSemaphore(u16 semaphore_value) {
impl->teakra.SetSemaphore(semaphore_value);
}
std::vector<u8> DspLle::PipeRead(DspPipe pipe_number, u32 length) {
return impl->ReadPipe(static_cast<u8>(pipe_number), static_cast<u16>(length));
}
std::size_t DspLle::GetPipeReadableSize(DspPipe pipe_number) const {
return impl->GetPipeReadableSize(static_cast<u8>(pipe_number));
}
void DspLle::PipeWrite(DspPipe pipe_number, const std::vector<u8>& buffer) {
impl->WritePipe(static_cast<u8>(pipe_number), buffer);
}

2
src/audio_core/lle/lle.h
View File

@ -16,6 +16,8 @@ public:
u16 RecvData(u32 register_number) override;
bool RecvDataIsReady(u32 register_number) const override;
void SetSemaphore(u16 semaphore_value) override;
std::vector<u8> PipeRead(DspPipe pipe_number, u32 length) override;
std::size_t GetPipeReadableSize(DspPipe pipe_number) const override;
void PipeWrite(DspPipe pipe_number, const std::vector<u8>& buffer) override;
private: