history-museum/winamp
1
0
Fork 0
mirror of https://github.com/WinampDesktop/winamp.git synced 2025-06-16 20:45:45 -04:00
Code Issues Actions Packages Projects Releases Wiki Activity

MDEC: Support resumable decoding from partial transfers

Browse Source
This commit is contained in:
Connor McLaughlin
2019-10-07 01:04:20 +10:00
parent caec927a98
commit c794d2911d
2 changed files with 153 additions and 126 deletions
Download Patch File Download Diff File Expand all files Collapse all files

24
src/core/mdec.h
View File

@ -29,6 +29,7 @@ public:
private:
static constexpr u32 DATA_IN_FIFO_SIZE = 1048576;
static constexpr u32 DATA_OUT_FIFO_SIZE = 1048576;
static constexpr u32 NUM_BLOCKS = 6;
enum DataOutputDepth : u8
{
@ -87,15 +88,15 @@ private:
u32 ReadDataRegister();
void WriteCommandRegister(u32 value);
void HandleDecodeMacroblockCommand();
void HandleSetQuantTableCommand();
void HandleSetScaleCommand();
bool HandleDecodeMacroblockCommand();
bool HandleSetQuantTableCommand();
bool HandleSetScaleCommand();
const u16* DecodeColoredMacroblock(const u16* src, const u16* src_end);
const u16* DecodeMonoMacroblock(const u16* src, const u16* src_end);
bool DecodeColoredMacroblock();
bool DecodeMonoMacroblock();
// from nocash spec
bool rl_decode_block(s16* blk, const u16*& src, const u16* src_end, const u8* qt);
bool rl_decode_block(s16* blk, 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);
@ -106,13 +107,20 @@ private:
StatusRegister m_status = {};
InlineFIFOQueue<u32, DATA_IN_FIFO_SIZE> m_data_in_fifo;
// Even though the DMA is in words, we access the FIFO as halfwords.
InlineFIFOQueue<u16, 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;
u32 m_remaining_words = 0;
std::array<u8, 64> m_iq_uv{};
std::array<u8, 64> m_iq_y{};
std::array<s16, 64> m_scale_table{};
// blocks, for colour: 0 - Crblk, 1 - Cbblk, 2-5 - Y 1-4
std::array<std::array<s16, 64>, NUM_BLOCKS> m_blocks;
u32 m_current_block = 0; // block (0-5)
u32 m_current_coefficient = 64; // k (in block)
u16 m_current_q_scale = 0;
};