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cgbwebcam
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lif 2024-03-03 00:52:02 -08:00
parent 8aecd02ea7
commit 6788c6f07b
2 changed files with 212 additions and 121 deletions
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2
CMakeLists.txt
View File

@ -1,6 +1,8 @@
cmake_minimum_required(VERSION 3.5) cmake_minimum_required(VERSION 3.5)
project(cgbwebcam) project(cgbwebcam)
set(CMAKE_EXPORT_COMPILE_COMMANDS ON)
set(SDL_STATIC ON) set(SDL_STATIC ON)
set(SDL_SHARED OFF) set(SDL_SHARED OFF)

223
main.c
View File

@ -1,3 +1,4 @@
#include "SDL_blendmode.h"
#include "SDL_error.h" #include "SDL_error.h"
#include "SDL_stdinc.h" #include "SDL_stdinc.h"
#include "SDL_surface.h" #include "SDL_surface.h"
@ -17,19 +18,21 @@
#include "mgba/feature/commandline.h" #include "mgba/feature/commandline.h"
#include "mgba-util/image.h" #include "mgba-util/image.h"
#define NUM_CHANNELS 3
static SDL_Window* window = NULL; static SDL_Window* window = NULL;
static SDL_Renderer* renderer = NULL; static SDL_Renderer* renderer = NULL;
static SDL_Camera* camera = NULL; static SDL_Camera* camera = NULL;
static SDL_CameraSpec spec; static SDL_CameraSpec spec;
static SDL_Texture* texture = NULL; static SDL_Texture* textures[NUM_CHANNELS] = { NULL, NULL, NULL };
static SDL_bool texture_updated = SDL_FALSE; static SDL_bool texture_updated = SDL_FALSE;
static SDL_Surface* frame_current = NULL;
static SDL_CameraDeviceID front_camera = 0; static SDL_CameraDeviceID front_camera = 0;
static SDL_CameraDeviceID back_camera = 0; static SDL_CameraDeviceID back_camera = 0;
static SDL_Surface* scaled = NULL; static SDL_Surface* scaled = NULL;
static SDL_Surface* screen = NULL; static SDL_Surface* filtered[NUM_CHANNELS] = { NULL, NULL, NULL };
static SDL_Surface* screens[NUM_CHANNELS] = { NULL, NULL, NULL };
static struct mCore* core = NULL; static struct mCore* cores[NUM_CHANNELS] = { NULL, NULL, NULL };
enum mColorFormat pixfmt_sdl_to_mgba(uint32_t sdl_fmt) { enum mColorFormat pixfmt_sdl_to_mgba(uint32_t sdl_fmt) {
switch (sdl_fmt) { switch (sdl_fmt) {
@ -54,47 +57,90 @@ enum mColorFormat pixfmt_sdl_to_mgba(uint32_t sdl_fmt) {
} }
} }
void myStartRequestImage(struct mImageSource* self, unsigned w, unsigned h, int colorFormats) { void myStartRequestImageRed(struct mImageSource* self, unsigned w, unsigned h, int colorFormats) {
SDL_DestroySurface(scaled); SDL_DestroySurface(scaled);
SDL_DestroySurface(filtered[0]);
scaled = SDL_CreateSurface(w, h, SDL_PIXELFORMAT_XBGR1555); scaled = SDL_CreateSurface(w, h, SDL_PIXELFORMAT_XBGR1555);
filtered[0] = SDL_CreateSurface(w, h, SDL_PIXELFORMAT_XBGR1555);
SDL_Log("scaled: %d x %d", w, h); SDL_Log("red: %d x %d", w, h);
// SDL_DestroyTexture(texture); // SDL_DestroyTexture(texture);
// texture = SDL_CreateTextureFromSurface(renderer, scaled); // texture = SDL_CreateTextureFromSurface(renderer, scaled);
} }
void myStopRequestImage(struct mImageSource* self) { void myStartRequestImageGreen(struct mImageSource* self, unsigned w, unsigned h, int colorFormats) {
SDL_DestroySurface(filtered[1]);
filtered[1] = SDL_CreateSurface(w, h, SDL_PIXELFORMAT_XBGR1555);
SDL_Log("green: %d x %d", w, h);
}
void myStartRequestImageBlue(struct mImageSource* self, unsigned w, unsigned h, int colorFormats) {
SDL_DestroySurface(filtered[2]);
filtered[2] = SDL_CreateSurface(w, h, SDL_PIXELFORMAT_XBGR1555);
SDL_Log("blue: %d x %d", w, h);
}
void myStopRequestImageRed(struct mImageSource* self) {
SDL_DestroySurface(scaled); SDL_DestroySurface(scaled);
SDL_DestroySurface(filtered[0]);
scaled = NULL; scaled = NULL;
filtered[0] = NULL;
} }
void myRequestImage(struct mImageSource* self, const void** buf, size_t* stride, enum mColorFormat* fmt) { void myStopRequestImageGreen(struct mImageSource* self) {
if (scaled != NULL && frame_current != NULL) { SDL_DestroySurface(filtered[1]);
struct SDL_Rect srcrect = frame_current->clip_rect; filtered[1] = NULL;
int w = srcrect.h * scaled->clip_rect.w / scaled->clip_rect.h;
if (w >= srcrect.w) {
srcrect.x = (srcrect.w - w) / 2;
srcrect.w = w;
} else {
int h = srcrect.w * scaled->clip_rect.h / scaled->clip_rect.w;
srcrect.y = (srcrect.h - h) / 2;
srcrect.h = h;
} }
int res = SDL_BlitSurfaceScaled(frame_current, &srcrect, scaled, &scaled->clip_rect, SDL_SCALEMODE_NEAREST);
if (res != 0) { void myStopRequestImageBlue(struct mImageSource* self) {
SDL_Log("failed to scale: %s", SDL_GetError()); SDL_DestroySurface(filtered[2]);
filtered[2] = NULL;
} }
*fmt = pixfmt_sdl_to_mgba(scaled->format->format);
*stride = scaled->pitch / (BYTES_PER_PIXEL / scaled->format->bytes_per_pixel); void myRequestImageRed(struct mImageSource* self, const void** buf, size_t* stride, enum mColorFormat* fmt) {
*buf = scaled->pixels; SDL_Surface* source = filtered[0];
if (source != NULL) {
*fmt = pixfmt_sdl_to_mgba(source->format->format);
*stride = source->pitch / (BYTES_PER_PIXEL / source->format->bytes_per_pixel);
*buf = source->pixels;
} }
} }
const struct mImageSource gb_img_src = { void myRequestImageGreen(struct mImageSource* self, const void** buf, size_t* stride, enum mColorFormat* fmt) {
.requestImage = myRequestImage, SDL_Surface* source = filtered[1];
.startRequestImage = myStartRequestImage, if (source != NULL) {
.stopRequestImage = myStopRequestImage, *fmt = pixfmt_sdl_to_mgba(source->format->format);
*stride = source->pitch / (BYTES_PER_PIXEL / source->format->bytes_per_pixel);
*buf = source->pixels;
}
}
void myRequestImageBlue(struct mImageSource* self, const void** buf, size_t* stride, enum mColorFormat* fmt) {
SDL_Surface* source = filtered[2];
if (source != NULL) {
*fmt = pixfmt_sdl_to_mgba(source->format->format);
*stride = source->pitch / (BYTES_PER_PIXEL / source->format->bytes_per_pixel);
*buf = source->pixels;
}
}
const struct mImageSource gb_img_src[3] = {
{
.requestImage = myRequestImageRed,
.startRequestImage = myStartRequestImageRed,
.stopRequestImage = myStopRequestImageRed,
},
{
.requestImage = myRequestImageGreen,
.startRequestImage = myStartRequestImageGreen,
.stopRequestImage = myStopRequestImageGreen,
},
{
.requestImage = myRequestImageBlue,
.startRequestImage = myStartRequestImageBlue,
.stopRequestImage = myStopRequestImageBlue,
},
}; };
int SDL_AppInit(int argc, char *argv[]) { int SDL_AppInit(int argc, char *argv[]) {
@ -112,7 +158,8 @@ int SDL_AppInit(int argc, char *argv[]) {
return -1; return -1;
} }
core = mCoreFind(args.fname); for (i = 0; i < NUM_CHANNELS; i++) {
struct mCore* core = mCoreFind(args.fname);
if (!core || !core->init(core)) { if (!core || !core->init(core)) {
SDL_Log("Couldn't initialize mgba core!"); SDL_Log("Couldn't initialize mgba core!");
return -1; return -1;
@ -132,8 +179,12 @@ int SDL_AppInit(int argc, char *argv[]) {
mCoreLoadConfig(core); mCoreLoadConfig(core);
cores[i] = core;
}
unsigned w, h; unsigned w, h;
core->currentVideoSize(core, &w, &h); // without loss of generality
cores[0]->currentVideoSize(cores[0], &w, &h);
if (SDL_Init(SDL_INIT_VIDEO | SDL_INIT_CAMERA) != 0) { if (SDL_Init(SDL_INIT_VIDEO | SDL_INIT_CAMERA) != 0) {
SDL_Log("Couldn't initialize SDL3: %s", SDL_GetError()); SDL_Log("Couldn't initialize SDL3: %s", SDL_GetError());
@ -185,62 +236,77 @@ int SDL_AppInit(int argc, char *argv[]) {
return -1; return -1;
} }
SDL_CameraSpec spec = { SDL_CameraSpec init_spec = {
.format = SDL_PIXELFORMAT_XBGR1555, .format = SDL_PIXELFORMAT_XBGR1555,
.width = 320, .width = 320,
.height = 240, .height = 240,
.interval_numerator = 1, .interval_numerator = 1,
.interval_denominator = 30, .interval_denominator = 30,
}; };
camera = SDL_OpenCameraDevice(devid, &spec); camera = SDL_OpenCameraDevice(devid, &init_spec);
if (!camera) { if (!camera) {
SDL_Log("Failed to open camera device: %s", SDL_GetError()); SDL_Log("Failed to open camera device: %s", SDL_GetError());
return -1; return -1;
} }
#if BYTES_PER_PIXEL == 4 #if BYTES_PER_PIXEL == 4
screen = SDL_CreateSurface(w, h, SDL_PIXELFORMAT_XBGR8888); uint32_t fmt = SDL_PIXELFORMAT_XBGR8888;
#elif BYTES_PER_PIXEL == 2 #elif BYTES_PER_PIXEL == 2
screen = SDL_CreateSurface(w, h, SDL_PIXELFORMAT_XBGR1555); uint32_t fmt = SDL_PIXELFORMAT_XBGR1555;
#else #else
#error "unknown pixel format" #error "unknown pixel format"
#endif #endif
for (i = 0; i < NUM_CHANNELS; i++) {
int j;
struct mCore* core = cores[i];
SDL_Surface* screen = SDL_CreateSurface(w, h, fmt);
core->setVideoBuffer(core, screen->pixels, screen->pitch / BYTES_PER_PIXEL); core->setVideoBuffer(core, screen->pixels, screen->pitch / BYTES_PER_PIXEL);
screens[i] = screen;
/* Create texture with appropriate format */ /* Create texture with appropriate format */
texture = SDL_CreateTextureFromSurface(renderer, screen); SDL_Texture* texture = SDL_CreateTextureFromSurface(renderer, screens[0]);
if (!texture) { if (!texture) {
SDL_Log("Couldn't create texture: %s", SDL_GetError()); SDL_Log("Couldn't create texture: %s", SDL_GetError());
return -1; return -1;
} }
SDL_SetTextureBlendMode(texture, SDL_BLENDMODE_ADD);
textures[i] = texture;
core->setPeripheral(core, mPERIPH_IMAGE_SOURCE, (void*)&gb_img_src); core->setPeripheral(core, mPERIPH_IMAGE_SOURCE, (void*)&gb_img_src[i]);
core->reset(core); core->reset(core);
core->setKeys(core, 0); core->setKeys(core, 0);
for (i = 0; i < 600; i++) { for (j = 0; j < 600; j++) {
core->runFrame(core); core->runFrame(core);
} }
core->setKeys(core, 1); // title screen core->setKeys(core, 1); // title screen
core->runFrame(core); core->runFrame(core);
core->setKeys(core, 0); core->setKeys(core, 0);
for (i = 0; i < 25; i++) { for (j = 0; j < 25; j++) {
core->runFrame(core); core->runFrame(core);
} }
core->setKeys(core, 1); // select 'shoot' core->setKeys(core, 1); // select 'shoot'
core->runFrame(core); core->runFrame(core);
core->setKeys(core, 0); core->setKeys(core, 0);
for (i = 0; i < 75; i++) { for (j = 0; j < 75; j++) {
core->runFrame(core); core->runFrame(core);
} }
core->setKeys(core, 1); // select 'shoot' again core->setKeys(core, 1); // select 'shoot' again
core->runFrame(core); core->runFrame(core);
core->setKeys(core, 0); core->setKeys(core, 0);
for (i = 0; i < 100; i++) { for (j = 0; j < 100; j++) {
core->runFrame(core); core->runFrame(core);
} }
SDL_Log("prepared core %d", i);
}
SDL_SetTextureColorMod(textures[0], 255, 0, 0);
SDL_SetTextureColorMod(textures[1], 0, 255, 0);
SDL_SetTextureColorMod(textures[2], 0, 0, 255);
return 0; /* start the main app loop. */ return 0; /* start the main app loop. */
} }
@ -262,11 +328,6 @@ static int FlipCamera(void) {
if (nextcam) { if (nextcam) {
SDL_Log("Flip camera!"); SDL_Log("Flip camera!");
if (frame_current) {
SDL_ReleaseCameraFrame(camera, frame_current);
frame_current = NULL;
}
SDL_CloseCamera(camera); SDL_CloseCamera(camera);
camera = SDL_OpenCameraDevice(nextcam, NULL); camera = SDL_OpenCameraDevice(nextcam, NULL);
@ -321,49 +382,77 @@ int SDL_AppEvent(const SDL_Event *event) {
} }
int SDL_AppIterate(void) { int SDL_AppIterate(void) {
SDL_SetRenderDrawColor(renderer, 0x99, 0x99, 0x99, 255); int i;
SDL_RenderClear(renderer);
if (scaled != NULL) {
Uint64 timestampNS = 0; Uint64 timestampNS = 0;
SDL_Surface *frame_next = camera ? SDL_AcquireCameraFrame(camera, &timestampNS) : NULL; SDL_Surface *frame = camera ? SDL_AcquireCameraFrame(camera, &timestampNS) : NULL;
if (frame_next) { if (frame) {
if (frame_current) { //SDL_Log("new frame %d x %d %s", frame->w, frame->h, SDL_GetPixelFormatName(frame->format->format));
if (SDL_ReleaseCameraFrame(camera, frame_current) < 0) { texture_updated = SDL_FALSE;
struct SDL_Rect srcrect = frame->clip_rect;
int w = srcrect.h * scaled->clip_rect.w / scaled->clip_rect.h;
if (w >= srcrect.w) {
srcrect.x = (srcrect.w - w) / 2;
srcrect.w = w;
} else {
int h = srcrect.w * scaled->clip_rect.h / scaled->clip_rect.w;
srcrect.y = (srcrect.h - h) / 2;
srcrect.h = h;
}
int res = SDL_BlitSurfaceScaled(frame, &srcrect, scaled, &scaled->clip_rect, SDL_SCALEMODE_NEAREST);
if (res != 0) {
SDL_Log("failed to scale: %s", SDL_GetError());
}
if (SDL_ReleaseCameraFrame(camera, frame) < 0) {
SDL_Log("err SDL_ReleaseCameraFrame: %s", SDL_GetError()); SDL_Log("err SDL_ReleaseCameraFrame: %s", SDL_GetError());
} }
SDL_SetSurfaceColorMod(scaled, 255, 0, 0);
SDL_BlitSurface(scaled, NULL, filtered[0], NULL);
SDL_SetSurfaceColorMod(scaled, 0, 255, 0);
SDL_BlitSurface(scaled, NULL, filtered[1], NULL);
SDL_SetSurfaceColorMod(scaled, 0, 0, 255);
SDL_BlitSurface(scaled, NULL, filtered[2], NULL);
}
} }
SDL_Log("new frame %d x %d %s", frame_next->w, frame_next->h, SDL_GetPixelFormatName(frame_next->format->format)); for (i = 0; i < NUM_CHANNELS; i++) {
struct mCore* core = cores[i];
/* It's not needed to keep the frame once updated the texture is updated.
* But in case of 0-copy, it's needed to have the frame while using the texture.
*/
frame_current = frame_next;
texture_updated = SDL_FALSE;
}
core->runFrame(core); core->runFrame(core);
}
if (!texture_updated) {
SDL_SetRenderDrawColor(renderer, 0, 0, 0, 255);
SDL_RenderClear(renderer);
/* Update SDL_Texture with last video frame (only once per new frame) */ /* Update SDL_Texture with last video frame (only once per new frame) */
if (frame_current && !texture_updated) { for (i = 0; i < NUM_CHANNELS; i++) {
// if (scaled) SDL_UpdateTexture(texture, NULL, scaled->pixels, scaled->pitch); SDL_Surface* screen = screens[i];
SDL_Texture* texture = textures[i];
SDL_UpdateTexture(texture, NULL, screen->pixels, screen->pitch); SDL_UpdateTexture(texture, NULL, screen->pixels, screen->pitch);
texture_updated = SDL_TRUE; texture_updated = SDL_TRUE;
SDL_RenderTexture(renderer, texture, NULL, NULL);
} }
SDL_RenderTexture(renderer, texture, NULL, NULL);
SDL_RenderPresent(renderer); SDL_RenderPresent(renderer);
}
return 0; /* keep iterating. */ return 0; /* keep iterating. */
} }
void SDL_AppQuit(void) { void SDL_AppQuit(void) {
mCoreConfigDeinit(&core->config); int i;
core->deinit(core); for (i = 0; i < NUM_CHANNELS; i++) {
mCoreConfigDeinit(&cores[i]->config);
cores[i]->deinit(cores[i]);
SDL_DestroyTexture(textures[i]);
}
SDL_ReleaseCameraFrame(camera, frame_current);
SDL_CloseCamera(camera); SDL_CloseCamera(camera);
SDL_DestroyTexture(texture);
SDL_DestroyRenderer(renderer); SDL_DestroyRenderer(renderer);
SDL_DestroyWindow(window); SDL_DestroyWindow(window);
} }