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System: Rewrite save state I/O

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No more ByteStream or virtual calls for every piece of data.
This commit is contained in:
Stenzek
2024-07-29 16:23:39 +10:00
parent dd8bf2c9d9
commit a6518ff9dc
14 changed files with 724 additions and 515 deletions
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25
src/core/save_state_version.h
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@ -5,11 +5,18 @@
#include "types.h"
static constexpr u32 SAVE_STATE_MAGIC = 0x43435544;
static constexpr u32 SAVE_STATE_VERSION = 68;
static constexpr u32 SAVE_STATE_VERSION = 69;
static constexpr u32 SAVE_STATE_MINIMUM_VERSION = 42;
static_assert(SAVE_STATE_VERSION >= SAVE_STATE_MINIMUM_VERSION);
enum class SaveStateCompression : u32
{
None = 0,
ZLib = 1,
ZStd = 2,
};
#pragma pack(push, 4)
struct SAVE_STATE_HEADER
{
@ -17,10 +24,6 @@ struct SAVE_STATE_HEADER
{
MAX_TITLE_LENGTH = 128,
MAX_SERIAL_LENGTH = 32,
COMPRESSION_TYPE_NONE = 0,
COMPRESSION_TYPE_ZLIB = 1,
COMPRESSION_TYPE_ZSTD = 2,
};
u32 magic;
@ -28,14 +31,16 @@ struct SAVE_STATE_HEADER
char title[MAX_TITLE_LENGTH];
char serial[MAX_SERIAL_LENGTH];
u32 media_filename_length;
u32 offset_to_media_filename;
u32 media_path_length;
u32 offset_to_media_path;
u32 media_subimage_index;
u32 unused_offset_to_playlist_filename; // Unused as of version 51.
// Screenshot compression added in version 69.
// Uncompressed size not stored, it can be inferred from width/height.
u32 screenshot_compression_type;
u32 screenshot_width;
u32 screenshot_height;
u32 screenshot_size;
u32 screenshot_compressed_size;
u32 offset_to_screenshot;
u32 data_compression_type;