mirror of
https://github.com/RetroDECK/Duckstation.git
synced 2024-09-17 08:02:41 +00:00
MDEC: More implementation work
This commit is contained in:
Connor McLaughlin
parent
a23a353dbb
commit
e8fc05fef5
431
src/pse/mdec.cpp
431
src/pse/mdec.cpp
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@ -24,9 +24,14 @@ void MDEC::Reset()
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bool MDEC::DoState(StateWrapper& sw)
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{
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sw.Do(&m_status_register.bits);
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sw.Do(&m_status.bits);
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sw.Do(&m_data_in_fifo);
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sw.Do(&m_data_out_fifo);
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sw.Do(&m_command);
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sw.Do(&m_command_parameter_count);
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sw.Do(&m_iq_uv);
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sw.Do(&m_iq_y);
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sw.Do(&m_scale_table);
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return !sw.HasError();
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}
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@ -40,8 +45,8 @@ u32 MDEC::ReadRegister(u32 offset)
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case 4:
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{
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Log_DebugPrintf("MDEC status register -> 0x%08X", m_status_register.bits);
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return m_status_register.bits;
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Log_DebugPrintf("MDEC status register -> 0x%08X", m_status.bits);
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return m_status.bits;
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}
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default:
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@ -70,8 +75,8 @@ void MDEC::WriteRegister(u32 offset, u32 value)
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if (cr.reset)
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SoftReset();
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m_status_register.data_in_request = cr.enable_dma_in;
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m_status_register.data_out_request = cr.enable_dma_out;
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m_status.data_in_request = cr.enable_dma_in;
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m_status.data_out_request = cr.enable_dma_out;
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m_dma->SetRequest(DMA::Channel::MDECin, cr.enable_dma_in);
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m_dma->SetRequest(DMA::Channel::MDECout, cr.enable_dma_out);
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@ -98,7 +103,7 @@ void MDEC::DMAWrite(u32 value)
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void MDEC::SoftReset()
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{
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m_status_register = {};
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m_status = {};
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m_data_in_fifo.Clear();
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m_data_out_fifo.Clear();
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@ -107,33 +112,423 @@ void MDEC::SoftReset()
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void MDEC::UpdateStatusRegister()
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{
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m_status_register.data_out_fifo_empty = m_data_out_fifo.IsEmpty();
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m_status_register.data_in_fifo_full = m_data_in_fifo.IsFull();
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m_status.data_out_fifo_empty = m_data_out_fifo.IsEmpty();
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m_status.data_in_fifo_full = m_data_in_fifo.IsFull();
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m_status.command_busy = !m_data_in_fifo.IsEmpty();
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if (!m_data_in_fifo.IsEmpty())
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{
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const CommandWord cw{m_data_in_fifo.Peek(0)};
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m_status.parameter_words_remaining = Truncate16(m_command_parameter_count - m_data_in_fifo.GetSize());
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}
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else
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{
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m_status.parameter_words_remaining = 0;
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}
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}
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u32 MDEC::ReadDataRegister()
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{
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if (m_data_out_fifo.IsEmpty())
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{
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// Log_WarningPrintf("MDEC data out FIFO empty on read");
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return UINT32_C(0xFFFFFFFF);
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}
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const u32 value = m_data_out_fifo.Pop();
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UpdateStatusRegister();
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return value;
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}
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void MDEC::WriteCommandRegister(u32 value)
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{
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Log_DebugPrintf("MDEC command/data register <- 0x%08X", value);
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if (m_data_in_fifo.IsEmpty())
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{
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// first word
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const CommandWord cw{value};
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m_command = cw.command;
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m_status.data_output_depth = cw.data_output_depth;
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m_status.data_output_signed = cw.data_output_signed;
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m_status.data_output_bit15 = cw.data_output_bit15;
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switch (cw.command)
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{
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case Command::DecodeMacroblock:
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m_command_parameter_count = ZeroExtend32(cw.parameter_word_count.GetValue());
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break;
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case Command::SetIqTab:
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m_command_parameter_count = 16 + (((value & 1) != 0) ? 16 : 0);
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break;
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case Command::SetScale:
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m_command_parameter_count = 32;
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break;
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default:
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Panic("Unknown command");
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break;
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}
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Log_DebugPrintf("MDEC command: 0x%08X (%u, %u words in parameter, %u expected)", cw.bits,
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ZeroExtend32(static_cast<u8>(cw.command.GetValue())),
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ZeroExtend32(cw.parameter_word_count.GetValue()), m_command_parameter_count);
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}
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m_data_in_fifo.Push(value);
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HandleCommand();
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if (m_data_in_fifo.GetSize() <= m_command_parameter_count)
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{
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UpdateStatusRegister();
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return;
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}
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// pop command
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m_data_in_fifo.RemoveOne();
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switch (m_command)
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{
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case Command::DecodeMacroblock:
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HandleDecodeMacroblockCommand();
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break;
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case Command::SetIqTab:
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HandleSetQuantTableCommand();
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break;
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case Command::SetScale:
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HandleSetScaleCommand();
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break;
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}
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m_data_in_fifo.Clear();
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m_command = Command::None;
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m_command_parameter_count = 0;
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UpdateStatusRegister();
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}
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u32 MDEC::ReadDataRegister()
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void MDEC::HandleDecodeMacroblockCommand()
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{
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if (m_data_out_fifo.IsEmpty())
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// TODO: Remove this copy and strict aliasing violation..
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std::vector<u16> temp(m_data_in_fifo.GetSize() * 2);
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m_data_in_fifo.PopRange(reinterpret_cast<u32*>(temp.data()), m_data_in_fifo.GetSize());
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const u16* src = temp.data();
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const u16* src_end = src + temp.size();
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if (m_status.data_output_depth <= DataOutputDepth_8Bit)
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{
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Log_WarningPrintf("MDEC data out FIFO empty on read");
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return UINT32_C(0xFFFFFFFF);
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while (src != src_end)
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{
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src = DecodeMonoMacroblock(src, src_end);
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Log_InfoPrint("Decoded mono macroblock");
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}
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}
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else
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{
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while (src != src_end)
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{
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src = DecodeColoredMacroblock(src, src_end);
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Log_InfoPrint("Decoded colour macroblock");
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}
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}
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}
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const u32 value = m_data_out_fifo.Pop();
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UpdateStatusRegister();
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return value;
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const u16* MDEC::DecodeMonoMacroblock(const u16* src, const u16* src_end)
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{
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std::array<s16, 64> Yblk;
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if (!rl_decode_block(Yblk.data(), src, src_end, m_iq_y.data()))
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return src_end;
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std::array<u8, 64> out_r;
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y_to_mono(Yblk, out_r);
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switch (m_status.data_output_depth)
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{
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case DataOutputDepth_4Bit:
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{
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const u8* in_ptr = out_r.data();
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for (u32 i = 0; i < (64 / 8); i++)
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{
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u32 value = ZeroExtend32(*(in_ptr++) >> 4);
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value |= ZeroExtend32(*(in_ptr++) >> 4) << 4;
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value |= ZeroExtend32(*(in_ptr++) >> 4) << 8;
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value |= ZeroExtend32(*(in_ptr++) >> 4) << 12;
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value |= ZeroExtend32(*(in_ptr++) >> 4) << 16;
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value |= ZeroExtend32(*(in_ptr++) >> 4) << 20;
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value |= ZeroExtend32(*(in_ptr++) >> 4) << 24;
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value |= ZeroExtend32(*(in_ptr++) >> 4) << 28;
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m_data_out_fifo.Push(value);
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}
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}
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break;
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case DataOutputDepth_8Bit:
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{
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const u8* in_ptr = out_r.data();
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for (u32 i = 0; i < (64 / 4); i++)
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{
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u32 value = ZeroExtend32(*in_ptr++);
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value |= ZeroExtend32(*in_ptr++) << 8;
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value |= ZeroExtend32(*in_ptr++) << 16;
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value |= ZeroExtend32(*in_ptr++) << 24;
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m_data_out_fifo.Push(value);
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}
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}
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break;
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default:
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break;
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}
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return src;
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}
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const u16* MDEC::DecodeColoredMacroblock(const u16* src, const u16* src_end)
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{
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std::array<s16, 64> Crblk;
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std::array<s16, 64> Cbblk;
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std::array<std::array<s16, 64>, 4> Yblk;
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std::array<u32, 256> out_rgb;
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if (!rl_decode_block(Crblk.data(), src, src_end, m_iq_uv.data()) ||
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!rl_decode_block(Cbblk.data(), src, src_end, m_iq_uv.data()) ||
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!rl_decode_block(Yblk[0].data(), src, src_end, m_iq_y.data()) ||
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!rl_decode_block(Yblk[1].data(), src, src_end, m_iq_y.data()) ||
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!rl_decode_block(Yblk[2].data(), src, src_end, m_iq_y.data()) ||
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!rl_decode_block(Yblk[3].data(), src, src_end, m_iq_y.data()))
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{
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return src_end;
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}
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yuv_to_rgb(0, 0, Crblk, Cbblk, Yblk[0], out_rgb);
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yuv_to_rgb(0, 8, Crblk, Cbblk, Yblk[1], out_rgb);
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yuv_to_rgb(8, 0, Crblk, Cbblk, Yblk[2], out_rgb);
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yuv_to_rgb(8, 8, Crblk, Cbblk, Yblk[3], out_rgb);
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switch (m_status.data_output_depth)
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{
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case DataOutputDepth_24Bit:
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{
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// pack tightly
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u32 index = 0;
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u32 state = 0;
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u32 rgb = 0;
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while (index < out_rgb.size())
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{
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switch (state)
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{
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case 0:
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rgb = out_rgb[index++]; // RGB-
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state = 1;
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break;
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case 1:
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rgb |= (out_rgb[index] & 0xFF) << 24; // RGBR
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m_data_out_fifo.Push(rgb);
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rgb = out_rgb[index] >> 8; // GB--
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index++;
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state = 2;
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break;
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case 2:
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rgb |= out_rgb[index] << 16; // GBRG
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m_data_out_fifo.Push(rgb);
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rgb = out_rgb[index] >> 16; // B---
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index++;
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state = 3;
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break;
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case 3:
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rgb |= out_rgb[index] << 8; // BRGB
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m_data_out_fifo.Push(rgb);
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index++;
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state = 0;
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break;
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}
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}
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break;
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}
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case DataOutputDepth_15Bit:
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{
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const u16 a = ZeroExtend16(m_status.data_output_bit15.GetValue());
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for (u32 i = 0; i < static_cast<u32>(out_rgb.size());)
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{
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u32 color = out_rgb[i++];
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u16 r = Truncate16((color >> 3) & 0x1Fu);
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u16 g = Truncate16((color >> 11) & 0x1Fu);
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u16 b = Truncate16((color >> 19) & 0x1Fu);
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const u16 color15a = r | (g << 5) | (b << 10) | (a << 15);
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color = out_rgb[i++];
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r = Truncate16((color >> 3) & 0x1Fu);
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g = Truncate16((color >> 11) & 0x1Fu);
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b = Truncate16((color >> 19) & 0x1Fu);
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const u16 color15b = r | (g << 5) | (b << 10) | (a << 15);
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m_data_out_fifo.Push(ZeroExtend32(color15a) | (ZeroExtend32(color15b) << 16));
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}
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}
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break;
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default:
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break;
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}
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return src;
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}
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static constexpr std::array<u8, 64> zigzag = {{0, 1, 5, 6, 14, 15, 27, 28, 2, 4, 7, 13, 16, 26, 29, 42,
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3, 8, 12, 17, 25, 30, 41, 43, 9, 11, 18, 24, 31, 40, 44, 53,
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10, 19, 23, 32, 39, 45, 52, 54, 20, 22, 33, 38, 46, 51, 55, 60,
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21, 34, 37, 47, 50, 56, 59, 61, 35, 36, 48, 49, 57, 58, 62, 63}};
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bool MDEC::rl_decode_block(s16* blk, const u16*& src, const u16* src_end, const u8* qt)
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{
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std::fill_n(blk, 64, s16(0));
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// skip padding
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u16 n;
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for (;;)
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{
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if (src == src_end)
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return false;
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n = *(src++);
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if (n == 0xFE00)
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continue;
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else
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break;
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}
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u32 k = 0;
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u16 q_scale = (n >> 10) & 0x3F;
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s32 val = SignExtendN<10, s32>(static_cast<s32>(n & 0x3FF)) * static_cast<s32>(ZeroExtend32(qt[k]));
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for (;;)
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{
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if (q_scale == 0)
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val = SignExtendN<10, s32>(static_cast<s32>(n & 0x3FF)) * 2;
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val = std::clamp(val, -0x400, 0x3FF);
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// val = val * static_cast<s32>(ZeroExtend32(scalezag[i]));
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if (q_scale > 0)
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blk[zigzag[k]] = static_cast<s16>(val);
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else if (q_scale == 0)
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blk[k] = static_cast<s16>(val);
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if (src == src_end)
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break;
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n = *(src++);
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k += ((n >> 10) & 0x3F) + 1;
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if (k >= 64)
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break;
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val = (SignExtendN<10, s32>(static_cast<s32>(n & 0x3FF)) * static_cast<s32>(ZeroExtend32(qt[k])) *
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static_cast<s32>(q_scale) +
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4) /
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8;
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}
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#undef READ_SRC
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// insufficient coefficients
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if (k < 64)
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{
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Log_DebugPrintf("Only %u of 64 coefficients in block, skipping", k);
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return false;
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}
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IDCT(blk);
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return true;
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}
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void MDEC::IDCT(s16* blk)
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{
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std::array<s64, 64> temp_buffer;
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for (u32 x = 0; x < 8; x++)
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{
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for (u32 y = 0; y < 8; y++)
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{
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s64 sum = 0;
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for (u32 u = 0; u < 8; u++)
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sum += s32(blk[u * 8 + x]) * s32(m_scale_table[u * 8 + y]);
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temp_buffer[x + y * 8] = sum;
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}
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}
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for (u32 x = 0; x < 8; x++)
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{
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for (u32 y = 0; y < 8; y++)
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{
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s64 sum = 0;
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for (u32 u = 0; u < 8; u++)
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sum += s64(temp_buffer[u + y * 8]) * s32(m_scale_table[u * 8 + x]);
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blk[x + y * 8] = static_cast<s16>(std::clamp<s32>(SignExtendN<9, s32>((sum >> 32) + ((sum >> 31) & 1)), -128, 127));
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}
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}
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}
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void MDEC::yuv_to_rgb(u32 xx, u32 yy, const std::array<s16, 64>& Crblk, const std::array<s16, 64>& Cbblk,
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const std::array<s16, 64>& Yblk, std::array<u32, 256>& rgb_out)
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{
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for (u32 y = 0; y < 8; y++)
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{
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for (u32 x = 0; x < 8; x++)
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{
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s16 R = Crblk[((x + xx) / 2) + ((y + yy) / 2) * 8];
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s16 B = Cbblk[((x + xx) / 2) + ((y + yy) / 2) * 8];
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s16 G = static_cast<s16>((-0.3437f * static_cast<float>(B)) + (-0.7143f * static_cast<float>(R)));
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R = static_cast<s16>(1.402f * static_cast<float>(R));
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B = static_cast<s16>(1.772f * static_cast<float>(B));
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s16 Y = Yblk[x + y * 8];
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R = static_cast<s16>(std::clamp(static_cast<int>(Y) + R, -128, 127));
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G = static_cast<s16>(std::clamp(static_cast<int>(Y) + G, -128, 127));
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B = static_cast<s16>(std::clamp(static_cast<int>(Y) + B, -128, 127));
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R += 128;
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G += 128;
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B += 128;
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rgb_out[(x + xx) + ((y + yy) * 16)] = ZeroExtend32(static_cast<u16>(R)) |
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(ZeroExtend32(static_cast<u16>(G)) << 8) |
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(ZeroExtend32(static_cast<u16>(B)) << 16);
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}
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}
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}
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|
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void MDEC::y_to_mono(const std::array<s16, 64>& Yblk, std::array<u8, 64>& r_out)
|
||||
{
|
||||
for (u32 i = 0; i < 64; i++)
|
||||
{
|
||||
s16 Y = Yblk[i];
|
||||
Y = SignExtendN<10, s16>(Y);
|
||||
Y = std::clamp<s16>(Y, -128, 127);
|
||||
Y += 128;
|
||||
r_out[i] = static_cast<u8>(Y);
|
||||
}
|
||||
}
|
||||
|
||||
void MDEC::HandleSetQuantTableCommand()
|
||||
{
|
||||
// TODO: Remove extra copies..
|
||||
std::array<u32, 16> packed_data;
|
||||
m_data_in_fifo.PopRange(packed_data.data(), static_cast<u32>(packed_data.size()));
|
||||
std::memcpy(m_iq_y.data(), packed_data.data(), m_iq_y.size());
|
||||
|
||||
if (!m_data_in_fifo.IsEmpty())
|
||||
{
|
||||
m_data_in_fifo.PopRange(packed_data.data(), static_cast<u32>(packed_data.size()));
|
||||
std::memcpy(m_iq_uv.data(), packed_data.data(), m_iq_uv.size());
|
||||
}
|
||||
}
|
||||
|
||||
void MDEC::HandleCommand()
|
||||
void MDEC::HandleSetScaleCommand()
|
||||
{
|
||||
Log_DebugPrintf("MDEC command: 0x%08X", m_data_in_fifo.Peek(0));
|
||||
// TODO: Remove extra copies..
|
||||
std::array<u32, 32> packed_data;
|
||||
m_data_in_fifo.PopRange(packed_data.data(), static_cast<u32>(packed_data.size()));
|
||||
std::memcpy(m_scale_table.data(), packed_data.data(), m_scale_table.size() * sizeof(s16));
|
||||
}
|
||||
|
|
|
|||
|
|
@ -2,8 +2,7 @@
|
|||
#include "common/bitfield.h"
|
||||
#include "common/fifo_queue.h"
|
||||
#include "types.h"
|
||||
#include <string>
|
||||
#include <vector>
|
||||
#include <array>
|
||||
|
||||
class StateWrapper;
|
||||
|
||||
|
|
@ -28,8 +27,8 @@ public:
|
|||
void DMAWrite(u32 value);
|
||||
|
||||
private:
|
||||
static constexpr u32 DATA_IN_FIFO_SIZE = 256;
|
||||
static constexpr u32 DATA_OUT_FIFO_SIZE = 256;
|
||||
static constexpr u32 DATA_IN_FIFO_SIZE = 1048576;
|
||||
static constexpr u32 DATA_OUT_FIFO_SIZE = 1048576;
|
||||
|
||||
enum DataOutputDepth : u8
|
||||
{
|
||||
|
|
@ -39,6 +38,14 @@ private:
|
|||
DataOutputDepth_15Bit = 3
|
||||
};
|
||||
|
||||
enum class Command : u8
|
||||
{
|
||||
None = 0,
|
||||
DecodeMacroblock = 1,
|
||||
SetIqTab = 2,
|
||||
SetScale = 3
|
||||
};
|
||||
|
||||
union StatusRegister
|
||||
{
|
||||
u32 bits;
|
||||
|
|
@ -63,19 +70,49 @@ private:
|
|||
BitField<u32, bool, 29, 1> enable_dma_out;
|
||||
};
|
||||
|
||||
union CommandWord
|
||||
{
|
||||
u32 bits;
|
||||
|
||||
BitField<u32, Command, 29, 3> command;
|
||||
BitField<u32, DataOutputDepth, 27, 2> data_output_depth;
|
||||
BitField<u32, bool, 26, 1> data_output_signed;
|
||||
BitField<u32, u8, 25, 1> data_output_bit15;
|
||||
BitField<u32, u16, 0, 16> parameter_word_count;
|
||||
};
|
||||
|
||||
void SoftReset();
|
||||
void UpdateStatusRegister();
|
||||
|
||||
void WriteCommandRegister(u32 value);
|
||||
u32 ReadDataRegister();
|
||||
void WriteCommandRegister(u32 value);
|
||||
|
||||
void HandleDecodeMacroblockCommand();
|
||||
void HandleSetQuantTableCommand();
|
||||
void HandleSetScaleCommand();
|
||||
|
||||
const u16* DecodeColoredMacroblock(const u16* src, const u16* src_end);
|
||||
const u16* DecodeMonoMacroblock(const u16* src, const u16* src_end);
|
||||
|
||||
// from nocash spec
|
||||
bool rl_decode_block(s16* blk, const u16*& src, const u16* src_end, const u8* qt);
|
||||
void IDCT(s16* blk);
|
||||
void yuv_to_rgb(u32 xx, u32 yy, const std::array<s16, 64>& Crblk, const std::array<s16, 64>& Cbblk,
|
||||
const std::array<s16, 64>& Yblk, std::array<u32, 256>& rgb_out);
|
||||
void y_to_mono(const std::array<s16, 64>& Yblk, std::array<u8, 64>& r_out);
|
||||
|
||||
void HandleCommand();
|
||||
|
||||
System* m_system = nullptr;
|
||||
DMA* m_dma = nullptr;
|
||||
|
||||
StatusRegister m_status_register = {};
|
||||
|
||||
StatusRegister m_status = {};
|
||||
|
||||
InlineFIFOQueue<u32, DATA_IN_FIFO_SIZE> m_data_in_fifo;
|
||||
InlineFIFOQueue<u32, DATA_OUT_FIFO_SIZE> m_data_out_fifo;
|
||||
Command m_command = Command::None;
|
||||
u32 m_command_parameter_count = 0;
|
||||
|
||||
std::array<u8, 64> m_iq_uv{};
|
||||
std::array<u8, 64> m_iq_y{};
|
||||
|
||||
std::array<s16, 64> m_scale_table{};
|
||||
};
|
||||
|
|
|
|||
Loading…
Reference in a new issue