chuniio: Break out Chunithm IO DLL

chunihook/dllmain.c

@@ -12,6 +12,8 @@
 #include "chunihook/jvs.h"
 #include "chunihook/slider-hook.h"
 
+#include "chuniio/chuniio.h"
+
 #include "hook/process.h"
 
 #include "hooklib/serial.h"
@@ -73,6 +75,10 @@ static DWORD CALLBACK chuni_pre_startup(void)
 
     dprintf("---  End  chuni_pre_startup ---\n");
 
+    /* Initialize IO DLL */
+
+    chuni_io_init();
+
     /* Jump to EXE start address */
 
     return chuni_startup();

chunihook/jvs.c

@@ -9,10 +9,17 @@
 
 #include "board/io3.h"
 
+#include "chuniio/chuniio.h"
+
 #include "jvs/jvs-bus.h"
 
 #include "util/dprintf.h"
 
+struct chunithm_jvs_ir_mask {
+    uint16_t p1;
+    uint16_t p2;
+};
+
 static void chunithm_jvs_read_switches(void *ctx, struct io3_switch_state *out);
 static uint16_t chunithm_jvs_read_coin_counter(void *ctx, uint8_t slot_no);
 
@@ -21,10 +28,16 @@ static const struct io3_ops chunithm_jvs_io3_ops = {
     .read_coin_counter  = chunithm_jvs_read_coin_counter,
 };
 
+static const struct chunithm_jvs_ir_mask chunithm_jvs_ir_masks[] = {
+    { 0x0000, 0x0020 },
+    { 0x0020, 0x0000 },
+    { 0x0000, 0x0010 },
+    { 0x0010, 0x0000 },
+    { 0x0000, 0x0008 },
+    { 0x0008, 0x0000 },
+};
+
 static struct io3 chunithm_jvs_io3;
-static size_t chunithm_jvs_rise_pos;
-static bool chunithm_jvs_coin;
-static uint16_t chunithm_jvs_coins;
 
 void chunithm_jvs_init(void)
 {
@@ -34,45 +47,37 @@ void chunithm_jvs_init(void)
 
 static void chunithm_jvs_read_switches(void *ctx, struct io3_switch_state *out)
 {
+    uint8_t opbtn;
+    uint8_t beams;
+    size_t i;
+
     assert(out != NULL);
 
-    /* Update simulated raise/lower state */
+    opbtn = 0;
+    beams = 0;
 
-    if (GetAsyncKeyState(VK_SPACE)) {
-        if (chunithm_jvs_rise_pos < 6) {
-            chunithm_jvs_rise_pos++;
-        }
-    } else {
-        if (chunithm_jvs_rise_pos > 0) {
-            chunithm_jvs_rise_pos--;
-        }
-    }
+    chuni_io_jvs_poll(&opbtn, &beams);
 
-    /* Render the state. Every case falls through, this is intentional. */
+    out->system = 0x00;
+    out->p1 = 0x0000;
+    out->p2 = 0x0000;
 
-    out->p1 = 0;
-    out->p2 = 0;
-
-    switch (chunithm_jvs_rise_pos) {
-    case 0: out->p2 |= 0x0020;
-    case 1: out->p1 |= 0x0020;
-    case 2: out->p2 |= 0x0010;
-    case 3: out->p1 |= 0x0010;
-    case 4: out->p2 |= 0x0008;
-    case 5: out->p1 |= 0x0008;
-    }
-
-    /* Update test/service buttons */
-
-    if (GetAsyncKeyState('1')) {
+    if (opbtn & 0x01) {
         out->system = 0x80;
     } else {
-        out->system = 0;
+        out->system = 0x00;
     }
 
-    if (GetAsyncKeyState('2')) {
+    if (opbtn & 0x02) {
         out->p1 |= 0x4000;
     }
+
+    for (i = 0 ; i < 6 ; i++) {
+        if (beams & (1 << i)) {
+            out->p1 |= chunithm_jvs_ir_masks[i].p1;
+            out->p2 |= chunithm_jvs_ir_masks[i].p2;
+        }
+    }
 }
 
 static uint16_t chunithm_jvs_read_coin_counter(void *ctx, uint8_t slot_no)
@@ -81,15 +86,5 @@ static uint16_t chunithm_jvs_read_coin_counter(void *ctx, uint8_t slot_no)
         return 0;
     }
 
-    if (GetAsyncKeyState('3')) {
-        if (!chunithm_jvs_coin) {
-            dprintf("Chunithm JVS: Coin drop\n");
-            chunithm_jvs_coin = true;
-            chunithm_jvs_coins++;
-        }
-    } else {
-        chunithm_jvs_coin = false;
-    }
-
-    return chunithm_jvs_coins;
+    return chuni_io_jvs_read_coin_counter();
 }

chunihook/meson.build

@@ -11,6 +11,7 @@ shared_library(
     link_with : [
         amex_lib,
         board_lib,
+        chuniio_dll,
         jvs_lib,
         platform_lib,
         util_lib,

chunihook/slider-hook.c

@@ -11,6 +11,8 @@
 
 #include "chunihook/slider-hook.h"
 
+#include "chuniio/chuniio.h"
+
 #include "hook/iobuf.h"
 #include "hook/iohook.h"
 
@@ -29,16 +31,13 @@ static HRESULT slider_req_auto_scan_start(void);
 static HRESULT slider_req_auto_scan_stop(void);
 static HRESULT slider_req_set_led(const struct slider_req_set_led *req);
 
-static unsigned int __stdcall slider_thread_proc(void *ctx);
+static void slider_res_auto_scan(const uint8_t *state);
 
 static CRITICAL_SECTION slider_lock;
 static struct uart slider_uart;
 static uint8_t slider_written_bytes[520];
 static uint8_t slider_readable_bytes[520];
 
-static HANDLE slider_thread;
-static bool slider_stop;
-
 void slider_hook_init(void)
 {
     InitializeCriticalSection(&slider_lock);
@@ -173,25 +172,8 @@ static HRESULT slider_req_get_board_info(void)
 
 static HRESULT slider_req_auto_scan_start(void)
 {
-    dprintf("Chunithm slider: Start slider thread\n");
-
-    if (slider_thread != NULL) {
-        dprintf("Thread is already running\n");
-
-        return S_OK;
-    }
-
-    slider_thread = (HANDLE) _beginthreadex(
-            NULL,
-            0,
-            slider_thread_proc,
-            NULL,
-            0,
-            NULL);
-
-    if (slider_thread == NULL) {
-        dprintf("Thread launch failed\n");
-    }
+    dprintf("Chunithm slider: Start slider notifications\n");
+    chuni_io_slider_start(slider_res_auto_scan);
 
     /* This message is not acknowledged */
 
@@ -202,21 +184,16 @@ static HRESULT slider_req_auto_scan_stop(void)
 {
     struct slider_hdr resp;
 
-    dprintf("Chunithm slider: Stop slider thread\n");
+    dprintf("Chunithm slider: Stop slider notifications\n");
+
+    /* IO DLL worker thread might attempt to invoke the callback (which needs
+       to take slider_lock, which we are currently holding) before noticing that
+       it needs to shut down. Unlock here so that we don't deadlock in that
+       situation. */
 
-    if (slider_thread != NULL) {
-        slider_stop = true;
     LeaveCriticalSection(&slider_lock);
-
-        WaitForSingleObject(slider_thread, INFINITE);
-        CloseHandle(slider_thread);
-        slider_thread = NULL;
-        slider_stop = false;
-
-        dprintf("Chunithm slider: Thread has terminated\n");
-
+    chuni_io_slider_stop();
     EnterCriticalSection(&slider_lock);
-    }
 
     resp.sync = SLIDER_FRAME_SYNC;
     resp.cmd = SLIDER_CMD_AUTO_SCAN_STOP;
@@ -227,45 +204,23 @@ static HRESULT slider_req_auto_scan_stop(void)
 
 static HRESULT slider_req_set_led(const struct slider_req_set_led *req)
 {
+    chuni_io_slider_set_leds(req->payload.rgb);
+
     /* This message is not acknowledged */
+
     return S_OK;
 }
 
-static unsigned int WINAPI slider_thread_proc(void *ctx)
+static void slider_res_auto_scan(const uint8_t *state)
 {
-    static const int keys[] = {
-        'S', 'D', 'F', 'G', 'H', 'J', 'K', 'L',
-    };
-
     struct slider_resp_auto_scan resp;
-    uint8_t pressure;
-    bool stop;
-    size_t i;
 
-    for (;;) {
     resp.hdr.sync = SLIDER_FRAME_SYNC;
     resp.hdr.cmd = SLIDER_CMD_AUTO_SCAN;
     resp.hdr.nbytes = sizeof(resp.pressure);
-
-        for (i = 0 ; i < 8 ; i++) {
-            pressure = GetAsyncKeyState(keys[i]) ? 20 : 0;
-            memset(&resp.pressure[28 - 4 * i], pressure, 4);
-        }
+    memcpy(resp.pressure, state, sizeof(resp.pressure));
 
     EnterCriticalSection(&slider_lock);
-
-        stop = slider_stop;
-
-        if (!stop) {
     slider_frame_encode(&slider_uart.readable, &resp, sizeof(resp));
-        }
-
     LeaveCriticalSection(&slider_lock);
-
-        if (stop) {
-            return 0;
-        }
-
-        Sleep(1);
-    }
 }

chuniio/chuniio.c

@@ -0,0 +1,130 @@
+#include <windows.h>
+
+#include <process.h>
+#include <stdbool.h>
+#include <stdint.h>
+
+#include "chuniio/chuniio.h"
+
+static unsigned int __stdcall chuni_io_slider_thread_proc(void *ctx);
+
+static const int chuni_io_slider_keys[] = {
+    'S', 'D', 'F', 'G', 'H', 'J', 'K', 'L',
+};
+
+static bool chuni_io_coin;
+static uint16_t chuni_io_coins;
+static uint8_t chuni_io_hand_pos;
+static HANDLE chuni_io_slider_thread;
+static bool chuni_io_slider_stop_flag;
+
+HRESULT chuni_io_init(void)
+{
+    return S_OK;
+}
+
+uint16_t chuni_io_jvs_read_coin_counter(void)
+{
+    if (GetAsyncKeyState('3')) {
+        if (!chuni_io_coin) {
+            chuni_io_coin = true;
+            chuni_io_coins++;
+        }
+    } else {
+        chuni_io_coin = false;
+    }
+
+    return chuni_io_coins;
+}
+
+void chuni_io_jvs_poll(uint8_t *opbtn, uint8_t *beams)
+{
+    size_t i;
+
+    if (GetAsyncKeyState('1')) {
+        *opbtn |= 0x01; /* Test */
+    }
+
+    if (GetAsyncKeyState('2')) {
+        *opbtn |= 0x02; /* Service */
+    }
+
+    if (GetAsyncKeyState(VK_SPACE)) {
+        if (chuni_io_hand_pos < 6) {
+            chuni_io_hand_pos++;
+        }
+    } else {
+        if (chuni_io_hand_pos > 0) {
+            chuni_io_hand_pos--;
+        }
+    }
+
+    for (i = 0 ; i < 6 ; i++) {
+        if (chuni_io_hand_pos > i) {
+            *beams |= (1 << i);
+        }
+    }
+}
+
+void chuni_io_jvs_set_coin_blocker(bool open)
+{}
+
+void chuni_io_slider_start(chuni_io_slider_callback_t callback)
+{
+    if (chuni_io_slider_thread != NULL) {
+        return;
+    }
+
+    chuni_io_slider_thread = (HANDLE) _beginthreadex(
+            NULL,
+            0,
+            chuni_io_slider_thread_proc,
+            callback,
+            0,
+            NULL);
+}
+
+void chuni_io_slider_stop(void)
+{
+    if (chuni_io_slider_thread == NULL) {
+        return;
+    }
+
+    chuni_io_slider_stop_flag = true;
+
+    WaitForSingleObject(chuni_io_slider_thread, INFINITE);
+    CloseHandle(chuni_io_slider_thread);
+    chuni_io_slider_thread = NULL;
+    chuni_io_slider_stop_flag = false;
+}
+
+void chuni_io_slider_set_leds(const uint8_t *rgb)
+{
+}
+
+static unsigned int __stdcall chuni_io_slider_thread_proc(void *ctx)
+{
+    chuni_io_slider_callback_t callback;
+    uint8_t pressure_val;
+    uint8_t pressure[32];
+    size_t i;
+
+    callback = ctx;
+
+    while (!chuni_io_slider_stop_flag) {
+        for (i = 0 ; i < 8 ; i++) {
+            if (GetAsyncKeyState(chuni_io_slider_keys[i]) & 0x8000) {
+                pressure_val = 20;
+            } else {
+                pressure_val = 0;
+            }
+
+            memset(&pressure[28 - 4 * i], pressure_val, 4);
+        }
+
+        callback(pressure);
+        Sleep(1);
+    }
+
+    return 0;
+}

chuniio/chuniio.def

@@ -0,0 +1,10 @@
+LIBRARY chuniio
+
+EXPORTS
+    chuni_io_init
+    chuni_io_jvs_poll
+    chuni_io_jvs_read_coin_counter
+    chuni_io_jvs_set_coin_blocker
+    chuni_io_slider_set_leds
+    chuni_io_slider_start
+    chuni_io_slider_stop

chuniio/chuniio.h

@@ -0,0 +1,99 @@
+#pragma once
+
+#include <windows.h>
+
+#include <stdbool.h>
+#include <stdint.h>
+
+/* Initialize the Chunithm IO provider DLL. This is the first function to be
+   called on this DLL. Returning failure from this function will cause the
+   main application to immediately exit.
+
+   All subsequent calls may originate from arbitrary threads and some may
+   overlap with each other. Ensuring synchronization inside your IO DLL is
+   your responsibility. */
+
+HRESULT chuni_io_init(void);
+
+/* Poll JVS input.
+
+   opbtn returns the cabinet test/service state, where bit 0 is Test and Bit 1
+   is Service.
+
+   beam returns the IR beams that are currently broken, where bit 0 is the
+   lowest IR beam and bit 5 is the highest IR beam, for a total of six beams.
+
+   Both bit masks are active-high.
+
+   Note that you cannot instantly break the entire IR grid in a single frame to
+   simulate hand movement; this will be judged as a miss. You need to simulate
+   a gradual raising and lowering of the hands. Consult the proof-of-concept
+   implementation for details. */
+
+void chuni_io_jvs_poll(uint8_t *opbtn, uint8_t *beams);
+
+/* Read the current state of the coin counter. This value should be incremented
+   for every coin detected by the coin acceptor mechanism. This count does not
+   need to persist beyond the lifetime of the process. */
+
+uint16_t chuni_io_jvs_read_coin_counter(void);
+
+/* Set the state of the coin blocker. Parameter is true if the blocker is
+   disengaged (i.e. coins can be inserted) and false if the blocker is engaged
+   (i.e. the coin slot should be physically blocked). */
+
+void chuni_io_jvs_set_coin_blocker(bool open);
+
+/* Chunithm touch slider layout:
+
+                               ^^^ Toward screen ^^^
+
+----+----+----+----+----+----+----+----+----+----+----+----+----+----+----+----+
+ 31 | 29 | 27 | 25 | 23 | 21 | 19 | 17 | 15 | 13 | 11 |  9 |  7 |  5 |  3 |  1 |
+----+----+----+----+----+----+----+----+----+----+----+----+----+----+----+----+
+ 32 | 30 | 28 | 26 | 24 | 22 | 20 | 18 | 16 | 14 | 12 | 10 |  8 |  6 |  4 |  2 |
+----+----+----+----+----+----+----+----+----+----+----+----+----+----+----+----+
+
+   There are a total of 32 regions on the touch slider. Each region can return
+   an 8-bit pressure value. The operator menu allows the operator to adjust the
+   pressure level at which a region is considered to be pressed; the factory
+   default value for this setting is 20. */
+
+/* Callback function supplied to your IO DLL. This must be called with a
+   pointer to a 32-byte array of pressure values, one byte per slider cell.
+   See above for layout and pressure threshold information.
+
+   The callback will copy the pressure state data out of your buffer before
+   returning. The pointer will not be retained. */
+
+typedef void (*chuni_io_slider_callback_t)(const uint8_t *state);
+
+/* Start polling the slider. Your DLL must start a polling thread and call the
+   supplied function periodically from that thread with new input state. The
+   update interval is up to you, but if your input device doesn't have any
+   preferred interval then 1 kHz is a reasonable maximum frequency.
+
+   Note that you do have to have to call the callback "occasionally" even if
+   nothing is changing, otherwise the game will raise a comm timeout error. */
+
+void chuni_io_slider_start(chuni_io_slider_callback_t callback);
+
+/* Stop polling the slider. You must cease to invoke the input callback before
+   returning from this function.
+
+   This *will* be called in the course of regular operation. For example,
+   every time you go into the operator menu the slider and all of the other I/O
+   on the cabinet gets restarted.
+
+   Following on from the above, the slider polling loop *will* be restarted
+   after being stopped in the course of regular operation. Do not permanently
+   tear down your input driver in response to this function call. */
+
+void chuni_io_slider_stop(void);
+
+/* Update the RGB lighting on the slider. A pointer to an array of 32 * 3 = 96
+   bytes is supplied. The illuminated areas on the touch slider are some
+   combination of rectangular regions and dividing lines between these regions
+   but the exact mapping of this lighting control buffer is still TBD. */
+
+void chuni_io_slider_set_leds(const uint8_t *rgb);

chuniio/meson.build

@@ -0,0 +1,12 @@
+chuniio_dll = shared_library(
+    'chuniio',
+    name_prefix : '',
+    include_directories : inc,
+    implicit_include_directories : false,
+    vs_module_defs : 'chuniio.def',
+    c_pch : '../precompiled.h',
+    sources : [
+        'chuniio.c',
+        'chuniio.h',
+    ],
+)

meson.build

@@ -37,6 +37,8 @@ subdir('platform')
 subdir('util')
 
 subdir('aimeio')
+subdir('chuniio')
+
 subdir('cardhook')
 subdir('chunihook')
 subdir('divahook')