SmackerLib API (#303)

* adds better smack support

* more docs

CMakeLists.txt

@@ -67,6 +67,7 @@ option(DETHRACE_FIX_BUGS "Fix Dethrace bugs" ON)
 
 add_subdirectory(src/harness)
 add_subdirectory(src/S3)
+add_subdirectory(src/smackw32)
 add_subdirectory(src/BRSRC13)
 add_subdirectory(src/DETHRACE)
 

docs/CODE_LAYOUT.md

@@ -3,11 +3,12 @@
 ### DETHRACE
 Game logic. According to the symbol dump, these files were originally stored in `C:\DETHRACE\src`.
 
-- `DETHRACE/common` - all common logic
-- `DETHRACE/pc-dos` - all platform-specific functions (DOS, in this case)
+- `DETHRACE/common` - common game logic
+- `DETHRACE/pc-dos` - DOS-specific functions
+- `DETHRACE/win95sys.c` - Windows-specific functions
 - `DETHRACE/pd` - platform-dependent generic headers.
 
-_All code here is kept as similar to how we think the original code might have been. Any changes required are implemented as hooks into `harness`._
+_All code here is kept as similar to how we think the original code might have looked. Any changes required are implemented as hooks into `harness`._
 
 ### BRSRC13
 
@@ -15,15 +16,19 @@ Graphics rendering library. [BRender](https://en.wikipedia.org/wiki/Argonaut_Gam
 
 - Stainless Software used their own build of BRender with unknown modifications.
 
-_All code here is kept as similar to how we think the original code might have been. Any changes required are implemented as hooks into `harness`._
+_All code here is kept as similar to how we think the original code might have looked. Any changes required are implemented as hooks into `harness`._
 
 ### S3
 
-Audio library. No other information. 
+Audio library. Possibly short for "Stainless Sound System"?! Supports at least two audio backends - [SOS](http://web.archive.org/web/19990221132448/http://www.humanmachine.com/sos.html) (DOS) and DirectSound.
 
-_All code here is kept as similar to how we think the original code might have been. Any changes required are implemented as hooks into `harness`._
+_All code here is kept as similar to how we think the original code might have looked, with the addition of a small amount of code integrating [miniaudio](https://miniaud.io)
+
+### smackw32
+
+Implements the [RAD Smacker lib](https://wiki.multimedia.cx/index.php/RAD_Game_Tools_Smacker_API) interface. The implementation is backed by [libsmacker](https://libsmacker.sourceforge.net/).
 
 ### harness
 
 - Provides functions that the original game logic calls to implement modern cross-platform support. 
-- SDL2 for windowing + input + networking, OpenGL for rendering, OpenAL for audio
+- SDL2, OpenGL, miniaudio

lib/libsmacker/CMakeLists.txt

@@ -6,21 +6,21 @@ if(NOT DEFINED CMAKE_BUILD_TYPE)
     set(CMAKE_BUILD_TYPE "Debug" CACHE STRING "Choose the type of build, options are: Debug Release RelWithDebInfo" FORCE)
 endif()
 
-project(smacker C)
+project(libsmacker C)
 
-add_library(smacker STATIC)
+add_library(libsmacker STATIC)
 
-target_include_directories(smacker PUBLIC
+target_include_directories(libsmacker PUBLIC
     .
 )
 
 if(NOT MSVC)
-    target_compile_options(smacker PRIVATE -Wall)
+    target_compile_options(libsmacker PRIVATE -Wall)
 else()
-    target_compile_definitions(smacker PRIVATE -D_CRT_SECURE_NO_WARNINGS)
+    target_compile_definitions(libsmacker PRIVATE -D_CRT_SECURE_NO_WARNINGS)
 endif()
 
-target_sources(smacker PRIVATE
+target_sources(libsmacker PRIVATE
     smacker.c
     smk_bitstream.c
     smk_hufftree.c

src/DETHRACE/CMakeLists.txt

@@ -10,7 +10,7 @@ target_include_directories(dethrace_obj
         pd
 )
 
-target_link_libraries(dethrace_obj PUBLIC SDL2::SDL2 smacker harness brender s3)
+target_link_libraries(dethrace_obj PUBLIC SDL2::SDL2 smackw32 harness brender s3)
 
 
 if (CMAKE_C_COMPILER_ID MATCHES "MSVC")

src/DETHRACE/common/cutscene.c

@@ -12,7 +12,7 @@
 #include "input.h"
 #include "loading.h"
 #include "pd/sys.h"
-#include "smacker.h"
+#include "smackw32/smackw32.h"
 #include "sound.h"
 #include "utility.h"
 #include <stdlib.h>
@@ -60,32 +60,24 @@ void PlaySmackerFile(char* pSmack_name) {
     tPath_name the_path;
     br_colour* br_colours_ptr;
     tU8* smack_colours_ptr;
-    // Smack* smk;
+    Smack* smk;
     int i;
     int j;
     int len;
     int fuck_off;
-
     LOG_TRACE("(\"%s\")", pSmack_name);
 
-    smk s;
-    br_uint_8* dest_pix = (br_uint_8*)gBack_screen->pixels;
-    unsigned long w, h, f;
-    unsigned char r, g, b;
-    double usf;
-    tU32 last_frame_time;
-
     if (!gSound_override && !gCut_scene_override) {
         StopMusic();
         FadePaletteDown();
         ClearEntireScreen();
+        SmackSoundUseDirectSound(NULL);
         br_colours_ptr = gCurrent_palette->pixels;
         PathCat(the_path, gApplication_path, "CUTSCENE");
         PathCat(the_path, the_path, pSmack_name);
-
         dr_dprintf("Trying to open smack file '%s'", the_path);
-        s = smk_open_file(the_path, SMK_MODE_MEMORY);
-        if (s == NULL) {
+        smk = SmackOpen(the_path, SMACKTRACKS, SMACKAUTOEXTRA);
+        if (smk == NULL) {
             dr_dprintf("Unable to open smack file - attempt to load smack from CD...");
             if (GetCDPathFromPathsTxtFile(the_path)) {
                 strcat(the_path, gDir_separator);
@@ -93,61 +85,50 @@ void PlaySmackerFile(char* pSmack_name) {
                 PathCat(the_path, the_path, "CUTSCENE");
                 PathCat(the_path, the_path, pSmack_name);
                 if (PDCheckDriveExists(the_path)) {
-                    s = smk_open_file(the_path, SMK_MODE_MEMORY);
+                    smk = SmackOpen(the_path, SMACKTRACKS, SMACKAUTOEXTRA);
                 }
             } else {
                 dr_dprintf("Can't get CD directory name");
             }
         }
-        if (s != NULL) {
+        if (smk != NULL) {
             dr_dprintf("Smack file opened OK");
-            smk_info_all(s, NULL, &f, &usf);
-            smk_info_video(s, &w, &h, NULL);
-            double fps = 1000000.0 / usf;
-            int delay_ms = (1 / fps) * 1000;
+            for (i = 1; i <= smk->Frames; i++) {
+                SmackToBuffer(smk, 0, 0, gBack_screen->row_bytes, gBack_screen->height, gBack_screen->pixels, 0);
 
-            smk_enable_video(s, 1);
-
-            smk_first(s);
-            do {
-                const unsigned char* pal = smk_get_palette(s);
-                for (i = 0; i < 256; i++) {
-                    r = pal[(i * 3)];
-                    g = pal[(i * 3) + 1];
-                    b = pal[(i * 3) + 2];
-                    br_colours_ptr[i] = b | (g << 8) | (r << 16);
-                }
-                DRSetPalette(gCurrent_palette);
-                EnsurePaletteUp();
-
-                const unsigned char* frame = smk_get_video(s);
-                for (i = 0; i < h; i++) {
-                    for (j = 0; j < w; j++) {
-                        dest_pix[(i * gBack_screen->row_bytes) + j] = frame[i * w + j];
+                if (smk->NewPalette) {
+                    smack_colours_ptr = smk->Palette;
+                    for (j = 0; j < 256; j++) {
+                        br_colours_ptr[j] = (smack_colours_ptr[j * 3] << 16) | smack_colours_ptr[j * 3 + 2] | (smack_colours_ptr[j * 3 + 1] << 8);
                     }
+
+                    // TOOD: remove the commented-out line below when smk->NewPalette is set correctly per-frame
+                    // memset(gBack_screen->pixels, 0, gBack_screen->row_bytes * gBack_screen->height);
+                    DRSetPalette(gCurrent_palette);
+                    PDScreenBufferSwap(0);
+                    EnsurePaletteUp();
+                }
+
+                SmackDoFrame(smk);
+                if (i != smk->Frames) {
+                    SmackNextFrame(smk);
                 }
                 PDScreenBufferSwap(0);
-                last_frame_time = PDGetTotalTime();
 
                 do {
                     fuck_off = AnyKeyDown() || EitherMouseButtonDown();
-                    // added by dethrace to avoid 100% cpu
-                    gHarness_platform.Sleep(1);
-                } while (!fuck_off && PDGetTotalTime() - last_frame_time < delay_ms);
+                } while (!fuck_off && SmackWait(smk));
                 if (fuck_off) {
                     break;
                 }
-            } while (smk_next(s) == SMK_MORE);
-
-            smk_close(s);
-
+            }
             FadePaletteDown();
             ClearEntireScreen();
-            StartMusic();
+            SmackClose(smk);
         } else {
             dr_dprintf("Smack file '%s' failed to open", pSmack_name);
-            StartMusic();
         }
+        StartMusic();
     }
 }
 

src/DETHRACE/dr_types.h

@@ -2942,62 +2942,6 @@ typedef struct _tag_sos_timer_system {
     W32 wMIDIActiveSongHandle;
 } _SOS_TIMER_SYSTEM;
 
-typedef struct SmackTag {
-    unsigned long Version;
-    unsigned long Width;
-    unsigned long Height;
-    unsigned long Frames;
-    unsigned long MSPerFrame;
-    unsigned long SmackerType;
-    unsigned long LargestInTrack[7];
-    unsigned long tablesize;
-    unsigned long codesize;
-    unsigned long absize;
-    unsigned long detailsize;
-    unsigned long typesize;
-    unsigned long TrackType[7];
-    unsigned long extra;
-    unsigned long NewPalette;
-    unsigned char Palette[772];
-    unsigned long PalType;
-    unsigned long FrameNum;
-    unsigned long FrameSize;
-    unsigned long SndSize;
-    unsigned long LastRectx;
-    unsigned long LastRecty;
-    unsigned long LastRectw;
-    unsigned long LastRecth;
-    unsigned long OpenFlags;
-    unsigned long LeftOfs;
-    unsigned long TopOfs;
-    unsigned long ReadError;
-    unsigned long addr32;
-} Smack;
-
-typedef struct SmackSumTag {
-    unsigned long TotalTime;
-    unsigned long MS100PerFrame;
-    unsigned long TotalOpenTime;
-    unsigned long TotalFrames;
-    unsigned long SkippedFrames;
-    unsigned long SoundSkips;
-    unsigned long TotalBlitTime;
-    unsigned long TotalReadTime;
-    unsigned long TotalDecompTime;
-    unsigned long TotalBackReadTime;
-    unsigned long TotalReadSpeed;
-    unsigned long SlowestFrameTime;
-    unsigned long Slowest2FrameTime;
-    unsigned long SlowestFrameNum;
-    unsigned long Slowest2FrameNum;
-    unsigned long AverageFrameSize;
-    unsigned long Highest1SecRate;
-    unsigned long Highest1SecFrame;
-    unsigned long HighestMemAmount;
-    unsigned long TotalExtraMemory;
-    unsigned long HighestExtraUsed;
-} SmackSum;
-
 #ifndef _WIN32
 typedef struct _heapinfo {
     void* _pentry;

src/harness/CMakeLists.txt

@@ -20,7 +20,7 @@ if(DETHRACE_FIX_BUGS)
     target_compile_definitions(harness PRIVATE DETHRACE_FIX_BUGS)
 endif()
 
-target_link_libraries(harness PRIVATE brender compile_with_werror)
+target_link_libraries(harness PRIVATE brender s3 compile_with_werror)
 
 if(WIN32)
     target_link_libraries(harness PRIVATE dbghelp)
@@ -89,7 +89,6 @@ if (IO_PLATFORM STREQUAL "SDL_OpenGL")
         resources/3d_frag.glsl.h
     )
     target_include_directories(harness PRIVATE "${dethrace_SOURCE_DIR}/src/DETHRACE/common")
-    target_include_directories(harness PRIVATE "${dethrace_SOURCE_DIR}/src/S3/include")
     target_link_libraries(harness PRIVATE SDL2::SDL2 glad)
 endif()
 

src/smackw32/CMakeLists.txt

@@ -0,0 +1,24 @@
+add_library(smackw32 STATIC)
+
+target_include_directories(smackw32 
+    PUBLIC
+        include
+    PRIVATE
+        ${CMAKE_SOURCE_DIR}      
+)
+
+target_link_libraries(smackw32 PRIVATE harness brender libsmacker compile_with_werror)
+
+if(NOT MSVC)
+    
+else()
+    target_compile_definitions(smackw32 PRIVATE -D_CRT_SECURE_NO_WARNINGS)
+    target_compile_options(smackw32 PRIVATE
+        /wd4101
+        /wd4996
+    )
+endif()
+
+target_sources(smackw32 PRIVATE
+    smackw32.c
+)

src/smackw32/README.md

@@ -0,0 +1,10 @@
+# smackw32
+
+Implementation of a minimal form of the Smacker API used by dethrace.
+
+See: 
+- https://wiki.multimedia.cx/index.php/RAD_Game_Tools_Smacker_API
+- https://github.com/OpenSourcedGames/Aliens-vs-Predator/blob/master/source/AvP_vc/3dc/win95/SMACK.H
+
+
+Backed by http://libsmacker.sourceforge.net

src/smackw32/include/smackw32/smackw32.h

@@ -0,0 +1,55 @@
+#include <stddef.h>
+#include <stdint.h>
+
+#define SMACKTRACK1 0x02000 // Play audio track 1
+#define SMACKTRACK2 0x04000 // Play audio track 2
+#define SMACKTRACK3 0x08000 // Play audio track 3
+#define SMACKTRACK4 0x10000 // Play audio track 4
+#define SMACKTRACK5 0x20000 // Play audio track 5
+#define SMACKTRACK6 0x40000 // Play audio track 6
+#define SMACKTRACK7 0x80000 // Play audio track 7
+#define SMACKTRACKS (SMACKTRACK1 | SMACKTRACK2 | SMACKTRACK3 | SMACKTRACK4 | SMACKTRACK5 | SMACKTRACK6 | SMACKTRACK7)
+#define SMACKAUTOEXTRA 0xffffffff
+
+typedef struct SmackTag {
+    unsigned long Version;
+    unsigned long Width;
+    unsigned long Height;
+    unsigned long Frames;
+    unsigned long MSPerFrame;
+    unsigned long SmackerType;
+    unsigned long LargestInTrack[7];
+    unsigned long tablesize;
+    unsigned long codesize;
+    unsigned long absize;
+    unsigned long detailsize;
+    unsigned long typesize;
+    unsigned long TrackType[7];
+    unsigned long extra;
+    unsigned long NewPalette;
+    unsigned char Palette[772];
+    unsigned long PalType;
+    unsigned long FrameNum;
+    unsigned long FrameSize;
+    unsigned long SndSize;
+    unsigned long LastRectx;
+    unsigned long LastRecty;
+    unsigned long LastRectw;
+    unsigned long LastRecth;
+    unsigned long OpenFlags;
+    unsigned long LeftOfs;
+    unsigned long TopOfs;
+    unsigned long ReadError;
+    unsigned long addr32;
+
+    // added by dethrace
+    void* smk_handle;
+} Smack;
+
+Smack* SmackOpen(const char* name, uint32_t flags, uint32_t extrabuf);
+int SmackSoundUseDirectSound(void* dd); // NULL mean create instance (apparently)
+void SmackToBuffer(Smack* smack, uint32_t left, uint32_t top, uint32_t pitch, uint32_t destheight, void* buf, uint32_t flags);
+uint32_t SmackDoFrame(Smack* smack);
+void SmackNextFrame(Smack* smack);
+uint32_t SmackWait(Smack* smack);
+void SmackClose(Smack* smack);

src/smackw32/smackw32.c

@@ -0,0 +1,99 @@
+#include "include/smackw32/smackw32.h"
+
+#include <assert.h>
+#include <stddef.h>
+#include <stdint.h>
+#include <stdlib.h>
+#include <string.h>
+
+#include "harness/hooks.h"
+// lib/libsmacker
+#include "smacker.h"
+
+uint32_t smack_last_frame_time;
+
+void copy_palette(Smack* smack) {
+    const unsigned char* pal = smk_get_palette(smack->smk_handle);
+    memcpy(smack->Palette, pal, 256 * 3);
+}
+
+Smack* SmackOpen(const char* name, uint32_t flags, uint32_t extrabuf) {
+    double usf;
+    Smack* smack;
+    double fps;
+
+    smk smk_handle = smk_open_file(name, SMK_MODE_MEMORY);
+    if (smk_handle == NULL) {
+        return NULL;
+    }
+
+    smack = malloc(sizeof(Smack));
+
+    // libsmacker doesn't tell us whether the palette is new on each frame or not, so just assume it always is new
+    smack->NewPalette = 1;
+
+    // smk_handle is added to hold a pointer to the underlying libsmacker instance
+    smack->smk_handle = smk_handle;
+
+    smk_info_all(smk_handle, NULL, &smack->Frames, &usf);
+    fps = 1000000.0 / usf;
+    smack->MSPerFrame = (1 / fps) * 1000;
+    smk_info_video(smk_handle, &smack->Width, &smack->Height, NULL);
+    smk_enable_video(smk_handle, 1);
+
+    if (smk_first(smk_handle) == SMK_ERROR) {
+        smk_close(smk_handle);
+        free(smack);
+        return NULL;
+    }
+    copy_palette(smack);
+    return smack;
+}
+
+int SmackSoundUseDirectSound(void* dd) {
+    // TODO: do some miniaudio init
+
+    return 0;
+}
+
+void SmackToBuffer(Smack* smack, uint32_t left, uint32_t top, uint32_t pitch, uint32_t destheight, void* buf, uint32_t flags) {
+    int i, j;
+
+    // minimal implementation
+    assert(left == 0);
+    assert(top == 0);
+    assert(flags == 0);
+
+    char* char_buf = buf;
+
+    const unsigned char* frame = smk_get_video(smack->smk_handle);
+    for (i = 0; i < destheight; i++) {
+        memcpy(&char_buf[(i * pitch)], &frame[i * pitch], pitch);
+    }
+}
+
+uint32_t SmackDoFrame(Smack* smack) {
+    smack_last_frame_time = gHarness_platform.GetTicks();
+
+    // TODO: audio processing
+    return 0;
+}
+
+void SmackNextFrame(Smack* smack) {
+    smk_next(smack->smk_handle);
+    copy_palette(smack);
+}
+
+uint32_t SmackWait(Smack* smack) {
+    uint32_t now = gHarness_platform.GetTicks();
+    if (now < smack_last_frame_time + smack->MSPerFrame) {
+        gHarness_platform.Sleep(1);
+        return 1;
+    }
+    return 0;
+}
+
+void SmackClose(Smack* smack) {
+    smk_close(smack->smk_handle);
+    free(smack);
+}