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obs-studio/plugins/win-capture/game-capture.c

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#include <inttypes.h>
#include <obs-module.h>
#include <util/platform.h>
#include <windows.h>
#include <dxgi.h>
#include <ipc-util/pipe.h>
#include "obfuscate.h"
#include "graphics-hook-info.h"
#include "window-helpers.h"
#include "cursor-capture.h"
#define do_log(level, format, ...) \
blog(level, "[game-capture: '%s'] " format, \
obs_source_get_name(gc->source), ##__VA_ARGS__)
#define warn(format, ...) do_log(LOG_WARNING, format, ##__VA_ARGS__)
#define info(format, ...) do_log(LOG_INFO, format, ##__VA_ARGS__)
#define debug(format, ...) do_log(LOG_DEBUG, format, ##__VA_ARGS__)
#define SETTING_ANY_FULLSCREEN "capture_any_fullscreen"
#define SETTING_CAPTURE_WINDOW "window"
#define SETTING_ACTIVE_WINDOW "active_window"
#define SETTING_WINDOW_PRIORITY "priority"
#define SETTING_COMPATIBILITY "sli_compatibility"
#define SETTING_FORCE_SCALING "force_scaling"
#define SETTING_SCALE_RES "scale_res"
#define SETTING_CURSOR "capture_cursor"
#define SETTING_TRANSPARENCY "allow_transparency"
#define SETTING_LIMIT_FRAMERATE "limit_framerate"
#define SETTING_CAPTURE_OVERLAYS "capture_overlays"
#define TEXT_GAME_CAPTURE obs_module_text("GameCapture")
#define TEXT_ANY_FULLSCREEN obs_module_text("GameCapture.AnyFullscreen")
#define TEXT_SLI_COMPATIBILITY obs_module_text("Compatibility")
#define TEXT_ALLOW_TRANSPARENCY obs_module_text("AllowTransparency")
#define TEXT_FORCE_SCALING obs_module_text("GameCapture.ForceScaling")
#define TEXT_SCALE_RES obs_module_text("GameCapture.ScaleRes")
#define TEXT_WINDOW obs_module_text("WindowCapture.Window")
#define TEXT_MATCH_PRIORITY obs_module_text("WindowCapture.Priority")
#define TEXT_MATCH_TITLE obs_module_text("WindowCapture.Priority.Title")
#define TEXT_MATCH_CLASS obs_module_text("WindowCapture.Priority.Class")
#define TEXT_MATCH_EXE obs_module_text("WindowCapture.Priority.Exe")
#define TEXT_CAPTURE_CURSOR obs_module_text("CaptureCursor")
#define TEXT_LIMIT_FRAMERATE obs_module_text("GameCapture.LimitFramerate")
#define TEXT_CAPTURE_OVERLAYS obs_module_text("GameCapture.CaptureOverlays")
#define DEFAULT_RETRY_INTERVAL 2.0f
#define ERROR_RETRY_INTERVAL 4.0f
struct game_capture_config {
char *title;
char *class;
char *executable;
enum window_priority priority;
uint32_t scale_cx;
uint32_t scale_cy;
bool cursor : 1;
bool force_shmem : 1;
bool capture_any_fullscreen : 1;
bool force_scaling : 1;
bool allow_transparency : 1;
bool limit_framerate : 1;
bool capture_overlays : 1;
};
struct game_capture {
obs_source_t *source;
struct cursor_data cursor_data;
HANDLE injector_process;
uint32_t cx;
uint32_t cy;
uint32_t pitch;
DWORD process_id;
DWORD thread_id;
HWND next_window;
HWND window;
float retry_time;
float fps_reset_time;
float retry_interval;
bool wait_for_target_startup : 1;
bool active : 1;
bool capturing : 1;
bool activate_hook : 1;
bool process_is_64bit : 1;
bool error_acquiring : 1;
bool dwm_capture : 1;
bool initial_config : 1;
bool convert_16bit : 1;
struct game_capture_config config;
ipc_pipe_server_t pipe;
gs_texture_t *texture;
struct hook_info *global_hook_info;
HANDLE keep_alive;
HANDLE hook_restart;
HANDLE hook_stop;
HANDLE hook_ready;
HANDLE hook_exit;
HANDLE hook_data_map;
HANDLE global_hook_info_map;
HANDLE target_process;
HANDLE texture_mutexes[2];
union {
struct {
struct shmem_data *shmem_data;
uint8_t *texture_buffers[2];
};
struct shtex_data *shtex_data;
void *data;
};
void (*copy_texture)(struct game_capture*);
};
struct graphics_offsets offsets32 = {0};
struct graphics_offsets offsets64 = {0};
static inline enum gs_color_format convert_format(uint32_t format)
{
switch (format) {
case DXGI_FORMAT_R8G8B8A8_UNORM: return GS_RGBA;
case DXGI_FORMAT_B8G8R8X8_UNORM: return GS_BGRX;
case DXGI_FORMAT_B8G8R8A8_UNORM: return GS_BGRA;
case DXGI_FORMAT_R10G10B10A2_UNORM: return GS_R10G10B10A2;
case DXGI_FORMAT_R16G16B16A16_UNORM: return GS_RGBA16;
case DXGI_FORMAT_R16G16B16A16_FLOAT: return GS_RGBA16F;
case DXGI_FORMAT_R32G32B32A32_FLOAT: return GS_RGBA32F;
}
return GS_UNKNOWN;
}
static void close_handle(HANDLE *p_handle)
{
HANDLE handle = *p_handle;
if (handle) {
if (handle != INVALID_HANDLE_VALUE)
CloseHandle(handle);
*p_handle = NULL;
}
}
static inline HMODULE kernel32(void)
{
static HMODULE kernel32_handle = NULL;
if (!kernel32_handle)
kernel32_handle = GetModuleHandleW(L"kernel32");
return kernel32_handle;
}
static inline HANDLE open_process(DWORD desired_access, bool inherit_handle,
DWORD process_id)
{
static HANDLE (WINAPI *open_process_proc)(DWORD, BOOL, DWORD) = NULL;
if (!open_process_proc)
open_process_proc = get_obfuscated_func(kernel32(),
"NuagUykjcxr", 0x1B694B59451ULL);
return open_process_proc(desired_access, inherit_handle, process_id);
}
static void stop_capture(struct game_capture *gc)
{
ipc_pipe_server_free(&gc->pipe);
if (gc->hook_stop) {
SetEvent(gc->hook_stop);
}
if (gc->global_hook_info) {
UnmapViewOfFile(gc->global_hook_info);
gc->global_hook_info = NULL;
}
if (gc->data) {
UnmapViewOfFile(gc->data);
gc->data = NULL;
}
close_handle(&gc->keep_alive);
close_handle(&gc->hook_restart);
close_handle(&gc->hook_stop);
close_handle(&gc->hook_ready);
close_handle(&gc->hook_exit);
close_handle(&gc->hook_data_map);
close_handle(&gc->global_hook_info_map);
close_handle(&gc->target_process);
close_handle(&gc->texture_mutexes[0]);
close_handle(&gc->texture_mutexes[1]);
if (gc->texture) {
obs_enter_graphics();
gs_texture_destroy(gc->texture);
obs_leave_graphics();
gc->texture = NULL;
}
gc->copy_texture = NULL;
gc->wait_for_target_startup = false;
gc->active = false;
gc->capturing = false;
}
static inline void free_config(struct game_capture_config *config)
{
bfree(config->title);
bfree(config->class);
bfree(config->executable);
memset(config, 0, sizeof(*config));
}
static void game_capture_destroy(void *data)
{
struct game_capture *gc = data;
stop_capture(gc);
obs_enter_graphics();
cursor_data_free(&gc->cursor_data);
obs_leave_graphics();
free_config(&gc->config);
bfree(gc);
}
static inline void get_config(struct game_capture_config *cfg,
obs_data_t *settings, const char *window)
{
int ret;
const char *scale_str;
build_window_strings(window, &cfg->class, &cfg->title,
&cfg->executable);
cfg->capture_any_fullscreen = obs_data_get_bool(settings,
SETTING_ANY_FULLSCREEN);
cfg->priority = (enum window_priority)obs_data_get_int(settings,
SETTING_WINDOW_PRIORITY);
cfg->force_shmem = obs_data_get_bool(settings,
SETTING_COMPATIBILITY);
cfg->cursor = obs_data_get_bool(settings, SETTING_CURSOR);
cfg->allow_transparency = obs_data_get_bool(settings,
SETTING_TRANSPARENCY);
cfg->force_scaling = obs_data_get_bool(settings,
SETTING_FORCE_SCALING);
cfg->limit_framerate = obs_data_get_bool(settings,
SETTING_LIMIT_FRAMERATE);
cfg->capture_overlays = obs_data_get_bool(settings,
SETTING_CAPTURE_OVERLAYS);
scale_str = obs_data_get_string(settings, SETTING_SCALE_RES);
ret = sscanf(scale_str, "%"PRIu32"x%"PRIu32,
&cfg->scale_cx, &cfg->scale_cy);
cfg->scale_cx &= ~2;
cfg->scale_cy &= ~2;
if (cfg->force_scaling) {
if (ret != 2 || cfg->scale_cx == 0 || cfg->scale_cy == 0) {
cfg->scale_cx = 0;
cfg->scale_cy = 0;
}
}
}
static inline int s_cmp(const char *str1, const char *str2)
{
if (!str1 || !str2)
return -1;
return strcmp(str1, str2);
}
static inline bool capture_needs_reset(struct game_capture_config *cfg1,
struct game_capture_config *cfg2)
{
if (cfg1->capture_any_fullscreen != cfg2->capture_any_fullscreen) {
return true;
} else if (!cfg1->capture_any_fullscreen &&
(s_cmp(cfg1->class, cfg2->class) != 0 ||
s_cmp(cfg1->title, cfg2->title) != 0 ||
s_cmp(cfg1->executable, cfg2->executable) != 0 ||
cfg1->priority != cfg2->priority)) {
return true;
} else if (cfg1->force_scaling != cfg2->force_scaling) {
return true;
} else if (cfg1->force_scaling &&
(cfg1->scale_cx != cfg2->scale_cx ||
cfg1->scale_cy != cfg2->scale_cy)) {
return true;
} else if (cfg1->force_shmem != cfg2->force_shmem) {
return true;
} else if (cfg1->limit_framerate != cfg2->limit_framerate) {
return true;
} else if (cfg1->capture_overlays != cfg2->capture_overlays) {
return true;
}
return false;
}
static void game_capture_update(void *data, obs_data_t *settings)
{
struct game_capture *gc = data;
struct game_capture_config cfg;
bool reset_capture = false;
const char *window = obs_data_get_string(settings,
SETTING_CAPTURE_WINDOW);
get_config(&cfg, settings, window);
reset_capture = capture_needs_reset(&cfg, &gc->config);
if (cfg.force_scaling && (cfg.scale_cx == 0 || cfg.scale_cy == 0)) {
gc->error_acquiring = true;
warn("error acquiring, scale is bad");
} else {
gc->error_acquiring = false;
}
free_config(&gc->config);
gc->config = cfg;
gc->activate_hook = !!window && !!*window;
gc->retry_interval = DEFAULT_RETRY_INTERVAL;
if (!gc->initial_config) {
if (reset_capture) {
stop_capture(gc);
}
} else {
gc->initial_config = false;
}
}
static void *game_capture_create(obs_data_t *settings, obs_source_t *source)
{
struct game_capture *gc = bzalloc(sizeof(*gc));
gc->source = source;
gc->initial_config = true;
gc->retry_interval = DEFAULT_RETRY_INTERVAL;
game_capture_update(gc, settings);
return gc;
}
static inline HANDLE create_event_id(bool manual_reset, bool initial_state,
const char *name, DWORD process_id)
{
char new_name[128];
sprintf(new_name, "%s%lu", name, process_id);
return CreateEventA(NULL, manual_reset, initial_state, new_name);
}
static inline HANDLE open_event_id(const char *name, DWORD process_id)
{
char new_name[128];
sprintf(new_name, "%s%lu", name, process_id);
return OpenEventA(EVENT_ALL_ACCESS, false, new_name);
}
#define STOP_BEING_BAD \
" This is most likely due to security software. Please make sure " \
"that the OBS installation folder is excluded/ignored in the " \
"settings of the security software you are using."
static bool check_file_integrity(struct game_capture *gc, const char *file,
const char *name)
{
DWORD error;
HANDLE handle;
if (!file || !*file) {
warn("Game capture %s not found." STOP_BEING_BAD, name);
return false;
}
handle = CreateFileA(file, GENERIC_READ | GENERIC_EXECUTE,
FILE_SHARE_READ, NULL, OPEN_EXISTING, 0, NULL);
if (handle != INVALID_HANDLE_VALUE) {
CloseHandle(handle);
return true;
}
error = GetLastError();
if (error == ERROR_FILE_NOT_FOUND) {
warn("Game capture file '%s' not found."
STOP_BEING_BAD, file);
} else if (error == ERROR_ACCESS_DENIED) {
warn("Game capture file '%s' could not be loaded."
STOP_BEING_BAD, file);
} else {
warn("Game capture file '%s' could not be loaded: %lu."
STOP_BEING_BAD, file, error);
}
return false;
}
static inline bool is_64bit_windows(void)
{
#ifdef _WIN64
return true;
#else
BOOL x86 = false;
bool success = !!IsWow64Process(GetCurrentProcess(), &x86);
return success && !!x86;
#endif
}
static inline bool is_64bit_process(HANDLE process)
{
BOOL x86 = true;
if (is_64bit_windows()) {
bool success = !!IsWow64Process(process, &x86);
if (!success) {
return false;
}
}
return !x86;
}
static inline bool open_target_process(struct game_capture *gc)
{
gc->target_process = open_process(
PROCESS_QUERY_INFORMATION | PROCESS_VM_READ,
false, gc->process_id);
if (!gc->target_process) {
warn("could not open process: %s", gc->config.executable);
return false;
}
gc->process_is_64bit = is_64bit_process(gc->target_process);
return true;
}
static inline bool init_keepalive(struct game_capture *gc)
{
gc->keep_alive = create_event_id(false, false, EVENT_HOOK_KEEPALIVE,
gc->process_id);
if (!gc->keep_alive) {
warn("failed to create keepalive event");
return false;
}
return true;
}
static inline bool init_texture_mutexes(struct game_capture *gc)
{
gc->texture_mutexes[0] = get_mutex_plus_id(MUTEX_TEXTURE1,
gc->process_id);
gc->texture_mutexes[1] = get_mutex_plus_id(MUTEX_TEXTURE2,
gc->process_id);
if (!gc->texture_mutexes[0] || !gc->texture_mutexes[1]) {
warn("failed to create texture mutexes: %lu", GetLastError());
return false;
}
return true;
}
/* if there's already a hook in the process, then signal and start */
static inline bool attempt_existing_hook(struct game_capture *gc)
{
gc->hook_restart = open_event_id(EVENT_CAPTURE_RESTART, gc->process_id);
if (gc->hook_restart) {
debug("existing hook found, signaling process: %s",
gc->config.executable);
SetEvent(gc->hook_restart);
return true;
}
return false;
}
static inline void reset_frame_interval(struct game_capture *gc)
{
struct obs_video_info ovi;
uint64_t interval = 0;
if (gc->config.limit_framerate && obs_get_video_info(&ovi))
interval = ovi.fps_den * 1000000000ULL / ovi.fps_num;
gc->global_hook_info->frame_interval = interval;
}
static inline bool init_hook_info(struct game_capture *gc)
{
gc->global_hook_info_map = get_hook_info(gc->process_id);
if (!gc->global_hook_info_map) {
warn("init_hook_info: get_hook_info failed: %lu",
GetLastError());
return false;
}
gc->global_hook_info = MapViewOfFile(gc->global_hook_info_map,
FILE_MAP_ALL_ACCESS, 0, 0,
sizeof(*gc->global_hook_info));
if (!gc->global_hook_info) {
warn("init_hook_info: failed to map data view: %lu",
GetLastError());
return false;
}
gc->global_hook_info->offsets = gc->process_is_64bit ?
offsets64 : offsets32;
gc->global_hook_info->capture_overlay = gc->config.capture_overlays;
gc->global_hook_info->force_shmem = gc->config.force_shmem;
gc->global_hook_info->use_scale = gc->config.force_scaling;
gc->global_hook_info->cx = gc->config.scale_cx;
gc->global_hook_info->cy = gc->config.scale_cy;
reset_frame_interval(gc);
obs_enter_graphics();
if (!gs_shared_texture_available())
gc->global_hook_info->force_shmem = true;
obs_leave_graphics();
obs_enter_graphics();
if (!gs_shared_texture_available())
gc->global_hook_info->force_shmem = true;
obs_leave_graphics();
return true;
}
static void pipe_log(void *param, uint8_t *data, size_t size)
{
struct game_capture *gc = param;
if (data && size)
info("%s", data);
}
static inline bool init_pipe(struct game_capture *gc)
{
char name[64];
sprintf(name, "%s%lu", PIPE_NAME, gc->process_id);
if (!ipc_pipe_server_start(&gc->pipe, name, pipe_log, gc)) {
warn("init_pipe: failed to start pipe");
return false;
}
return true;
}
static inline bool create_inject_process(struct game_capture *gc,
const char *inject_path, const char *hook_path)
{
wchar_t *command_line_w = malloc(4096 * sizeof(wchar_t));
wchar_t *inject_path_w;
wchar_t *hook_path_w;
PROCESS_INFORMATION pi = {0};
STARTUPINFO si = {0};
bool success = false;
os_utf8_to_wcs_ptr(inject_path, 0, &inject_path_w);
os_utf8_to_wcs_ptr(hook_path, 0, &hook_path_w);
si.cb = sizeof(si);
swprintf(command_line_w, 4096, L"\"%s\" \"%s\" %lu",
inject_path_w, hook_path_w, gc->thread_id);
success = !!CreateProcessW(inject_path_w, command_line_w, NULL, NULL,
false, CREATE_NO_WINDOW, NULL, NULL, &si, &pi);
if (success) {
CloseHandle(pi.hThread);
gc->injector_process = pi.hProcess;
} else {
warn("Failed to create inject helper process: %lu",
GetLastError());
}
free(command_line_w);
bfree(inject_path_w);
bfree(hook_path_w);
return success;
}
static inline bool inject_hook(struct game_capture *gc)
{
bool success = false;
char *inject_path;
char *hook_path;
if (gc->process_is_64bit) {
inject_path = obs_module_file("inject-helper64.exe");
hook_path = obs_module_file("graphics-hook64.dll");
} else {
inject_path = obs_module_file("inject-helper32.exe");
hook_path = obs_module_file("graphics-hook32.dll");
}
if (!check_file_integrity(gc, inject_path, "inject helper")) {
goto cleanup;
}
if (!check_file_integrity(gc, hook_path, "graphics hook")) {
goto cleanup;
}
success = create_inject_process(gc, inject_path, hook_path);
cleanup:
bfree(inject_path);
bfree(hook_path);
return success;
}
static bool init_hook(struct game_capture *gc)
{
if (gc->config.capture_any_fullscreen) {
struct dstr name = {0};
if (get_window_exe(&name, gc->next_window)) {
info("attempting to hook fullscreen process: %s",
name.array);
dstr_free(&name);
}
} else {
info("attempting to hook process: %s", gc->config.executable);
}
if (!open_target_process(gc)) {
return false;
}
if (!init_keepalive(gc)) {
return false;
}
if (!init_texture_mutexes(gc)) {
return false;
}
if (!init_hook_info(gc)) {
return false;
}
if (!init_pipe(gc)) {
return false;
}
if (!attempt_existing_hook(gc)) {
if (!inject_hook(gc)) {
return false;
}
}
gc->window = gc->next_window;
gc->next_window = NULL;
gc->active = true;
return true;
}
static void get_fullscreen_window(struct game_capture *gc)
{
HWND window = GetForegroundWindow();
MONITORINFO mi = {0};
HMONITOR monitor;
DWORD styles;
RECT rect;
gc->next_window = NULL;
if (!window) {
return;
}
if (!GetWindowRect(window, &rect)) {
return;
}
/* ignore regular maximized windows */
styles = (DWORD)GetWindowLongPtr(window, GWL_STYLE);
if ((styles & WS_MAXIMIZE) != 0 && (styles & WS_BORDER) != 0) {
return;
}
monitor = MonitorFromRect(&rect, MONITOR_DEFAULTTONEAREST);
if (!monitor) {
return;
}
mi.cbSize = sizeof(mi);
if (!GetMonitorInfo(monitor, &mi)) {
return;
}
if (rect.left == mi.rcMonitor.left &&
rect.right == mi.rcMonitor.right &&
rect.bottom == mi.rcMonitor.bottom &&
rect.top == mi.rcMonitor.top) {
/* always wait a bit for the target process to start up before
* starting the hook process; sometimes they have important
* modules to load first or other hooks (such as steam) need a
* little bit of time to load. ultimately this helps prevent
* crashes */
if (gc->wait_for_target_startup) {
gc->retry_interval = 3.0f;
gc->wait_for_target_startup = false;
} else {
gc->next_window = window;
}
} else {
gc->wait_for_target_startup = true;
}
}
static void get_selected_window(struct game_capture *gc)
{
if (strcmpi(gc->config.class, "dwm") == 0) {
wchar_t class_w[512];
os_utf8_to_wcs(gc->config.class, 0, class_w, 512);
gc->next_window = FindWindowW(class_w, NULL);
} else {
gc->next_window = find_window(INCLUDE_MINIMIZED,
gc->config.priority,
gc->config.class,
gc->config.title,
gc->config.executable);
}
}
static void try_hook(struct game_capture *gc)
{
if (gc->config.capture_any_fullscreen) {
get_fullscreen_window(gc);
} else {
get_selected_window(gc);
}
if (gc->next_window) {
gc->thread_id = GetWindowThreadProcessId(gc->next_window,
&gc->process_id);
if (!gc->thread_id || !gc->process_id) {
warn("error acquiring, failed to get window "
"thread/process ids: %lu",
GetLastError());
gc->error_acquiring = true;
return;
}
if (!init_hook(gc)) {
stop_capture(gc);
}
} else {
gc->active = false;
}
}
static inline bool init_events(struct game_capture *gc)
{
if (!gc->hook_restart) {
gc->hook_restart = get_event_plus_id(EVENT_CAPTURE_RESTART,
gc->process_id);
if (!gc->hook_restart) {
warn("init_events: failed to get hook_restart "
"event: %lu", GetLastError());
return false;
}
}
if (!gc->hook_stop) {
gc->hook_stop = get_event_plus_id(EVENT_CAPTURE_STOP,
gc->process_id);
if (!gc->hook_stop) {
warn("init_events: failed to get hook_stop event: %lu",
GetLastError());
return false;
}
}
if (!gc->hook_ready) {
gc->hook_ready = get_event_plus_id(EVENT_HOOK_READY,
gc->process_id);
if (!gc->hook_ready) {
warn("init_events: failed to get hook_ready event: %lu",
GetLastError());
return false;
}
}
if (!gc->hook_exit) {
gc->hook_exit = get_event_plus_id(EVENT_HOOK_EXIT,
gc->process_id);
if (!gc->hook_exit) {
warn("init_events: failed to get hook_exit event: %lu",
GetLastError());
return false;
}
}
return true;
}
static inline bool init_capture_data(struct game_capture *gc)
{
char name[64];
sprintf(name, "%s%u", SHMEM_TEXTURE, gc->global_hook_info->map_id);
gc->cx = gc->global_hook_info->cx;
gc->cy = gc->global_hook_info->cy;
gc->pitch = gc->global_hook_info->pitch;
if (gc->data) {
UnmapViewOfFile(gc->data);
gc->data = NULL;
}
CloseHandle(gc->hook_data_map);
gc->hook_data_map = OpenFileMappingA(FILE_MAP_ALL_ACCESS, false, name);
if (!gc->hook_data_map) {
DWORD error = GetLastError();
if (error == 2) {
info("init_capture_data: file mapping not found, "
"retrying. (this is often normal, and may take "
"a few tries)");
} else {
warn("init_capture_data: failed to open file "
"mapping: %lu", error);
}
return false;
}
gc->data = MapViewOfFile(gc->hook_data_map, FILE_MAP_ALL_ACCESS, 0, 0,
gc->global_hook_info->map_size);
if (!gc->data) {
warn("init_capture_data: failed to map data view: %lu",
GetLastError());
return false;
}
return true;
}
#define PIXEL_16BIT_SIZE 2
#define PIXEL_32BIT_SIZE 4
static inline uint32_t convert_5_to_8bit(uint16_t val)
{
return (uint32_t)((double)(val & 0x1F) * (255.0/31.0));
}
static inline uint32_t convert_6_to_8bit(uint16_t val)
{
return (uint32_t)((double)(val & 0x3F) * (255.0/63.0));
}
static void copy_b5g6r5_tex(struct game_capture *gc, int cur_texture,
uint8_t *data, uint32_t pitch)
{
uint8_t *input = gc->texture_buffers[cur_texture];
uint32_t gc_cx = gc->cx;
uint32_t gc_cy = gc->cy;
uint32_t gc_pitch = gc->pitch;
for (uint32_t y = 0; y < gc_cy; y++) {
register uint8_t *in = input + (gc_pitch * y);
register uint8_t *end = input + (gc_cx * PIXEL_16BIT_SIZE);
register uint8_t *out = data + pitch;
while (in < end) {
register uint16_t in_pix = *(uint16_t*)in;
register uint32_t out_pix = 0xFF000000;
out_pix |= convert_5_to_8bit(in_pix);
in_pix >>= 5;
out_pix |= convert_6_to_8bit(in_pix) << 8;
in_pix >>= 6;
out_pix |= convert_5_to_8bit(in_pix) << 16;
*(uint32_t*)out = out_pix;
in += PIXEL_16BIT_SIZE;
out += PIXEL_32BIT_SIZE;
}
}
}
static void copy_b5g5r5a1_tex(struct game_capture *gc, int cur_texture,
uint8_t *data, uint32_t pitch)
{
uint8_t *input = gc->texture_buffers[cur_texture];
uint32_t gc_cx = gc->cx;
uint32_t gc_cy = gc->cy;
uint32_t gc_pitch = gc->pitch;
for (uint32_t y = 0; y < gc_cy; y++) {
register uint8_t *in = input + (gc_pitch * y);
register uint8_t *end = input + (gc_cx * PIXEL_16BIT_SIZE);
register uint8_t *out = data + pitch;
while (in < end) {
register uint16_t in_pix = *(uint16_t*)in;
register uint32_t out_pix = 0;
out_pix |= convert_5_to_8bit(in_pix);
in_pix >>= 5;
out_pix |= convert_5_to_8bit(in_pix) << 8;
in_pix >>= 5;
out_pix |= convert_5_to_8bit(in_pix) << 16;
in_pix >>= 5;
out_pix |= (in_pix * 255) << 24;
*(uint32_t*)out = out_pix;
in += PIXEL_16BIT_SIZE;
out += PIXEL_32BIT_SIZE;
}
}
}
static inline void copy_16bit_tex(struct game_capture *gc, int cur_texture,
uint8_t *data, uint32_t pitch)
{
if (gc->global_hook_info->format == DXGI_FORMAT_B5G5R5A1_UNORM) {
copy_b5g5r5a1_tex(gc, cur_texture, data, pitch);
} else if (gc->global_hook_info->format == DXGI_FORMAT_B5G6R5_UNORM) {
copy_b5g6r5_tex(gc, cur_texture, data, pitch);
}
}
static void copy_shmem_tex(struct game_capture *gc)
{
int cur_texture = gc->shmem_data->last_tex;
HANDLE mutex = NULL;
uint32_t pitch;
int next_texture;
uint8_t *data;
if (cur_texture < 0 || cur_texture > 1)
return;
next_texture = cur_texture == 1 ? 0 : 1;
if (object_signalled(gc->texture_mutexes[cur_texture])) {
mutex = gc->texture_mutexes[cur_texture];
} else if (object_signalled(gc->texture_mutexes[next_texture])) {
mutex = gc->texture_mutexes[next_texture];
cur_texture = next_texture;
} else {
return;
}
if (gs_texture_map(gc->texture, &data, &pitch)) {
if (gc->convert_16bit) {
copy_16bit_tex(gc, cur_texture, data, pitch);
} else if (pitch == gc->pitch) {
memcpy(data, gc->texture_buffers[cur_texture],
pitch * gc->cy);
} else {
uint8_t *input = gc->texture_buffers[cur_texture];
uint32_t best_pitch =
pitch < gc->pitch ? pitch : gc->pitch;
for (uint32_t y = 0; y < gc->cy; y++) {
uint8_t *line_in = input + gc->pitch * y;
uint8_t *line_out = data + pitch * y;
memcpy(line_out, line_in, best_pitch);
}
}
gs_texture_unmap(gc->texture);
}
ReleaseMutex(mutex);
}
static inline bool is_16bit_format(uint32_t format)
{
return format == DXGI_FORMAT_B5G5R5A1_UNORM ||
format == DXGI_FORMAT_B5G6R5_UNORM;
}
static inline bool init_shmem_capture(struct game_capture *gc)
{
enum gs_color_format format;
gc->texture_buffers[0] =
(uint8_t*)gc->data + gc->shmem_data->tex1_offset;
gc->texture_buffers[1] =
(uint8_t*)gc->data + gc->shmem_data->tex2_offset;
gc->convert_16bit = is_16bit_format(gc->global_hook_info->format);
format = gc->convert_16bit ?
GS_BGRA : convert_format(gc->global_hook_info->format);
obs_enter_graphics();
gs_texture_destroy(gc->texture);
gc->texture = gs_texture_create(gc->cx, gc->cy, format, 1, NULL,
GS_DYNAMIC);
obs_leave_graphics();
if (!gc->texture) {
warn("init_shmem_capture: failed to create texture");
return false;
}
gc->copy_texture = copy_shmem_tex;
return true;
}
static inline bool init_shtex_capture(struct game_capture *gc)
{
obs_enter_graphics();
gs_texture_destroy(gc->texture);
gc->texture = gs_texture_open_shared(gc->shtex_data->tex_handle);
obs_leave_graphics();
if (!gc->texture) {
warn("init_shtex_capture: failed to open shared handle");
return false;
}
return true;
}
static bool start_capture(struct game_capture *gc)
{
if (!init_events(gc)) {
return false;
}
if (!init_capture_data(gc)) {
return false;
}
if (gc->global_hook_info->type == CAPTURE_TYPE_MEMORY) {
if (!init_shmem_capture(gc)) {
return false;
}
} else {
if (!init_shtex_capture(gc)) {
return false;
}
}
return true;
}
static inline bool capture_valid(struct game_capture *gc)
{
if (!gc->dwm_capture && !IsWindow(gc->window))
return false;
return !object_signalled(gc->target_process);
}
static void game_capture_tick(void *data, float seconds)
{
struct game_capture *gc = data;
if (gc->hook_stop && object_signalled(gc->hook_stop)) {
stop_capture(gc);
}
if (gc->active && !gc->hook_ready && gc->process_id) {
gc->hook_ready = get_event_plus_id(EVENT_HOOK_READY,
gc->process_id);
}
if (gc->injector_process && object_signalled(gc->injector_process)) {
DWORD exit_code = 0;
GetExitCodeProcess(gc->injector_process, &exit_code);
close_handle(&gc->injector_process);
if (exit_code != 0) {
warn("inject process failed: %lu", exit_code);
gc->error_acquiring = true;
} else if (!gc->capturing) {
gc->retry_interval = ERROR_RETRY_INTERVAL;
stop_capture(gc);
}
}
if (gc->hook_ready && object_signalled(gc->hook_ready)) {
gc->capturing = start_capture(gc);
if (!gc->capturing) {
gc->retry_interval = ERROR_RETRY_INTERVAL;
stop_capture(gc);
}
}
gc->retry_time += seconds;
if (!gc->active) {
if (!gc->error_acquiring &&
gc->retry_time > gc->retry_interval) {
if (gc->config.capture_any_fullscreen ||
gc->activate_hook) {
try_hook(gc);
gc->retry_time = 0.0f;
}
}
} else {
if (!capture_valid(gc)) {
info("capture window no longer exists, "
"terminating capture");
stop_capture(gc);
} else {
if (gc->copy_texture) {
obs_enter_graphics();
gc->copy_texture(gc);
obs_leave_graphics();
}
if (gc->config.cursor) {
obs_enter_graphics();
cursor_capture(&gc->cursor_data);
obs_leave_graphics();
}
gc->fps_reset_time += seconds;
if (gc->fps_reset_time >= gc->retry_interval) {
reset_frame_interval(gc);
gc->fps_reset_time = 0.0f;
}
}
}
}
static inline void game_capture_render_cursor(struct game_capture *gc)
{
POINT p = {0};
if (!gc->global_hook_info->window ||
!gc->global_hook_info->base_cx ||
!gc->global_hook_info->base_cy)
return;
ClientToScreen((HWND)(uintptr_t)gc->global_hook_info->window, &p);
float x_scale = (float)gc->global_hook_info->cx /
(float)gc->global_hook_info->base_cx;
float y_scale = (float)gc->global_hook_info->cy /
(float)gc->global_hook_info->base_cy;
cursor_draw(&gc->cursor_data, -p.x, -p.y, x_scale, y_scale,
gc->global_hook_info->base_cx,
gc->global_hook_info->base_cy);
}
static void game_capture_render(void *data, gs_effect_t *effect)
{
struct game_capture *gc = data;
if (!gc->texture)
return;
effect = obs_get_default_effect();
while (gs_effect_loop(effect, "Draw")) {
if (!gc->config.allow_transparency) {
gs_enable_blending(false);
gs_enable_color(true, true, true, false);
}
obs_source_draw(gc->texture, 0, 0, 0, 0,
gc->global_hook_info->flip);
if (!gc->config.allow_transparency) {
gs_enable_blending(true);
gs_enable_color(true, true, true, true);
}
if (gc->config.cursor) {
game_capture_render_cursor(gc);
}
}
}
static uint32_t game_capture_width(void *data)
{
struct game_capture *gc = data;
return gc->active ? gc->global_hook_info->cx : 0;
}
static uint32_t game_capture_height(void *data)
{
struct game_capture *gc = data;
return gc->active ? gc->global_hook_info->cy : 0;
}
static const char *game_capture_name(void)
{
return TEXT_GAME_CAPTURE;
}
static void game_capture_defaults(obs_data_t *settings)
{
obs_data_set_default_bool(settings, SETTING_ANY_FULLSCREEN, true);
obs_data_set_default_int(settings, SETTING_WINDOW_PRIORITY,
(int)WINDOW_PRIORITY_EXE);
obs_data_set_default_bool(settings, SETTING_COMPATIBILITY, false);
obs_data_set_default_bool(settings, SETTING_FORCE_SCALING, false);
obs_data_set_default_bool(settings, SETTING_CURSOR, true);
obs_data_set_default_bool(settings, SETTING_TRANSPARENCY, false);
obs_data_set_default_string(settings, SETTING_SCALE_RES, "0x0");
obs_data_set_default_bool(settings, SETTING_LIMIT_FRAMERATE, false);
obs_data_set_default_bool(settings, SETTING_CAPTURE_OVERLAYS, false);
}
static bool any_fullscreen_callback(obs_properties_t *ppts,
obs_property_t *p, obs_data_t *settings)
{
bool any_fullscreen = obs_data_get_bool(settings,
SETTING_ANY_FULLSCREEN);
p = obs_properties_get(ppts, SETTING_CAPTURE_WINDOW);
obs_property_set_enabled(p, !any_fullscreen);
p = obs_properties_get(ppts, SETTING_WINDOW_PRIORITY);
obs_property_set_enabled(p, !any_fullscreen);
return true;
}
static bool use_scaling_callback(obs_properties_t *ppts, obs_property_t *p,
obs_data_t *settings)
{
bool use_scale = obs_data_get_bool(settings, SETTING_FORCE_SCALING);
p = obs_properties_get(ppts, SETTING_SCALE_RES);
obs_property_set_enabled(p, use_scale);
return true;
}
static void insert_preserved_val(obs_property_t *p, const char *val)
{
char *class = NULL;
char *title = NULL;
char *executable = NULL;
struct dstr desc = {0};
build_window_strings(val, &class, &title, &executable);
dstr_printf(&desc, "[%s]: %s", executable, title);
obs_property_list_insert_string(p, 1, desc.array, val);
obs_property_list_item_disable(p, 1, true);
dstr_free(&desc);
bfree(class);
bfree(title);
bfree(executable);
}
static bool window_changed_callback(obs_properties_t *ppts, obs_property_t *p,
obs_data_t *settings)
{
const char *cur_val;
bool match = false;
size_t i = 0;
cur_val = obs_data_get_string(settings, SETTING_CAPTURE_WINDOW);
if (!cur_val) {
return false;
}
for (;;) {
const char *val = obs_property_list_item_string(p, i++);
if (!val)
break;
if (strcmp(val, cur_val) == 0) {
match = true;
break;
}
}
if (cur_val && *cur_val && !match) {
insert_preserved_val(p, cur_val);
return true;
}
UNUSED_PARAMETER(ppts);
return false;
}
static const double default_scale_vals[] = {
1.25,
1.5,
2.0,
2.5,
3.0
};
#define NUM_DEFAULT_SCALE_VALS \
(sizeof(default_scale_vals) / sizeof(default_scale_vals[0]))
static BOOL CALLBACK EnumFirstMonitor(HMONITOR monitor, HDC hdc,
LPRECT rc, LPARAM data)
{
*(HMONITOR*)data = monitor;
UNUSED_PARAMETER(hdc);
UNUSED_PARAMETER(rc);
return false;
}
static obs_properties_t *game_capture_properties(void *data)
{
HMONITOR monitor;
uint32_t cx = 1920;
uint32_t cy = 1080;
/* scaling is free form, this is mostly just to provide some common
* values */
bool success = !!EnumDisplayMonitors(NULL, NULL, EnumFirstMonitor,
(LPARAM)&monitor);
if (success) {
MONITORINFO mi = {0};
mi.cbSize = sizeof(mi);
if (!!GetMonitorInfo(monitor, &mi)) {
cx = (uint32_t)(mi.rcMonitor.right - mi.rcMonitor.left);
cy = (uint32_t)(mi.rcMonitor.bottom - mi.rcMonitor.top);
}
}
obs_properties_t *ppts = obs_properties_create();
obs_property_t *p;
p = obs_properties_add_bool(ppts, SETTING_ANY_FULLSCREEN,
TEXT_ANY_FULLSCREEN);
obs_property_set_modified_callback(p, any_fullscreen_callback);
p = obs_properties_add_list(ppts, SETTING_CAPTURE_WINDOW, TEXT_WINDOW,
OBS_COMBO_TYPE_LIST, OBS_COMBO_FORMAT_STRING);
obs_property_list_add_string(p, "", "");
fill_window_list(p, INCLUDE_MINIMIZED);
obs_property_set_modified_callback(p, window_changed_callback);
p = obs_properties_add_list(ppts, SETTING_WINDOW_PRIORITY,
TEXT_MATCH_PRIORITY, OBS_COMBO_TYPE_LIST,
OBS_COMBO_FORMAT_INT);
obs_property_list_add_int(p, TEXT_MATCH_TITLE, WINDOW_PRIORITY_TITLE);
obs_property_list_add_int(p, TEXT_MATCH_CLASS, WINDOW_PRIORITY_CLASS);
obs_property_list_add_int(p, TEXT_MATCH_EXE, WINDOW_PRIORITY_EXE);
obs_properties_add_bool(ppts, SETTING_COMPATIBILITY,
TEXT_SLI_COMPATIBILITY);
p = obs_properties_add_bool(ppts, SETTING_FORCE_SCALING,
TEXT_FORCE_SCALING);
obs_property_set_modified_callback(p, use_scaling_callback);
p = obs_properties_add_list(ppts, SETTING_SCALE_RES, TEXT_SCALE_RES,
OBS_COMBO_TYPE_EDITABLE, OBS_COMBO_FORMAT_STRING);
for (size_t i = 0; i < NUM_DEFAULT_SCALE_VALS; i++) {
char scale_str[64];
uint32_t new_cx =
(uint32_t)((double)cx / default_scale_vals[i]) & ~2;
uint32_t new_cy =
(uint32_t)((double)cy / default_scale_vals[i]) & ~2;
sprintf(scale_str, "%"PRIu32"x%"PRIu32, new_cx, new_cy);
obs_property_list_add_string(p, scale_str, scale_str);
}
obs_property_set_enabled(p, false);
obs_properties_add_bool(ppts, SETTING_TRANSPARENCY,
TEXT_ALLOW_TRANSPARENCY);
obs_properties_add_bool(ppts, SETTING_LIMIT_FRAMERATE,
TEXT_LIMIT_FRAMERATE);
obs_properties_add_bool(ppts, SETTING_CAPTURE_OVERLAYS,
TEXT_CAPTURE_OVERLAYS);
obs_properties_add_bool(ppts, SETTING_CURSOR, TEXT_CAPTURE_CURSOR);
UNUSED_PARAMETER(data);
return ppts;
}
struct obs_source_info game_capture_info = {
.id = "game_capture",
.type = OBS_SOURCE_TYPE_INPUT,
.output_flags = OBS_SOURCE_VIDEO | OBS_SOURCE_CUSTOM_DRAW,
.get_name = game_capture_name,
.create = game_capture_create,
.destroy = game_capture_destroy,
.get_width = game_capture_width,
.get_height = game_capture_height,
.get_defaults = game_capture_defaults,
.get_properties = game_capture_properties,
.update = game_capture_update,
.video_tick = game_capture_tick,
.video_render = game_capture_render
};
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