Relintai/rpi-fbcp
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Test process. (WIP)

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Relintai 2020-12-24 01:52:37 +01:00
parent b6f00dd45f
commit 0294539bf0
2 changed files with 124 additions and 1 deletions
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5
CMakeLists.txt
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@ -16,3 +16,8 @@ target_link_libraries(fbcp bcm_host)
set (CMAKE_C_FLAGS "-std=gnu99 ${CMAKE_C_FLAGS}")
set (CMAKE_C_FLAGS "-std=gnu99 ${CMAKE_C_FLAGS}")
set (CMAKE_C_FLAGS "-std=gnu99 ${CMAKE_C_FLAGS}")

120
main.c
View File

@ -360,6 +360,7 @@ int process_skip_rows() {
vc_dispmanx_display_close(display);
}
int process() {
DISPMANX_DISPLAY_HANDLE_T display;
DISPMANX_MODEINFO_T display_info;
@ -508,13 +509,130 @@ int process() {
vc_dispmanx_display_close(display);
}
int process_test() {
DISPMANX_DISPLAY_HANDLE_T display;
DISPMANX_MODEINFO_T display_info;
DISPMANX_RESOURCE_HANDLE_T screen_resource;
VC_IMAGE_TRANSFORM_T transform;
uint32_t image_prt;
VC_RECT_T rect1;
int ret;
int fbfd = 0;
char *fbp = 0;
struct fb_var_screeninfo vinfo;
struct fb_fix_screeninfo finfo;
uint16_t *screenbuf[3];
uint8_t bufNum = 0;
bcm_host_init();
display = vc_dispmanx_display_open(0);
if (!display) {
syslog(LOG_ERR, "Unable to open primary display");
return -1;
}
ret = vc_dispmanx_display_get_info(display, &display_info);
if (ret) {
syslog(LOG_ERR, "Unable to get primary display information");
return -1;
}
syslog(LOG_INFO, "Primary display is %d x %d", display_info.width, display_info.height);
fbfd = open("/dev/fb1", O_RDWR);
if (fbfd == -1) {
syslog(LOG_ERR, "Unable to open secondary display");
return -1;
}
if (ioctl(fbfd, FBIOGET_FSCREENINFO, &finfo)) {
syslog(LOG_ERR, "Unable to get secondary display information");
return -1;
}
if (ioctl(fbfd, FBIOGET_VSCREENINFO, &vinfo)) {
syslog(LOG_ERR, "Unable to get secondary display information");
return -1;
}
syslog(LOG_INFO, "Second display is %d x %d %dbps\n", vinfo.xres, vinfo.yres, vinfo.bits_per_pixel);
screen_resource = vc_dispmanx_resource_create(VC_IMAGE_RGB565, vinfo.xres, vinfo.yres, &image_prt);
if (!screen_resource) {
syslog(LOG_ERR, "Unable to create screen buffer");
close(fbfd);
vc_dispmanx_display_close(display);
return -1;
}
// Allocate 3 screen buffers (current, prior, delta)
screenbuf[0] = (uint16_t *)malloc(vinfo.xres * vinfo.yres * 2 * 3);
if(!screenbuf[0]) {
printf("malloc fail");
return -1;
}
memset(screenbuf[0], 0, vinfo.xres * vinfo.yres * 2 * 2);
screenbuf[1] = &screenbuf[0][vinfo.xres * vinfo.yres];
screenbuf[2] = &screenbuf[1][vinfo.xres * vinfo.yres];
fbp = (char*) mmap(0, finfo.smem_len, PROT_READ | PROT_WRITE, MAP_SHARED, fbfd, 0);
if (fbp <= 0) {
syslog(LOG_ERR, "Unable to create mamory mapping");
close(fbfd);
ret = vc_dispmanx_resource_delete(screen_resource);
vc_dispmanx_display_close(display);
return -1;
}
vc_dispmanx_rect_set(&rect1, 0, 0, vinfo.xres, vinfo.yres);
while (1) {
ret = vc_dispmanx_snapshot(display, screen_resource, 0);
// Transfer snamshot to screenbuf
vc_dispmanx_resource_read_data(screen_resource, &rect1,
(char *)screenbuf[bufNum], vinfo.xres * vinfo.bits_per_pixel / 8);
#if 0
// Let's try a full-width copy (single memcpy operation)
memcpy(
(uint16_t *)&fbp[firstRow * vinfo.xres * 2],
&screenbuf[bufNum][firstRow * vinfo.xres],
vinfo.xres * (lastRow - firstRow + 1) * 2);
#else
int bytes = (100) * 2;
uint16_t
*src = &screenbuf[bufNum][0],
*dst = (uint16_t *)&fbp[0];
for(int row=0; row < 100; row++) {
memcpy(dst, src, bytes);
src += vinfo.xres;
dst += vinfo.xres;
}
#endif
bufNum = 1 - bufNum;
}
usleep(1000000 / 30); // 30 fps max
}
munmap(fbp, finfo.smem_len);
close(fbfd);
ret = vc_dispmanx_resource_delete(screen_resource);
vc_dispmanx_display_close(display);
}
int main(int argc, char **argv) {
setlogmask(LOG_UPTO(LOG_DEBUG));
openlog("fbcp", LOG_NDELAY | LOG_PID, LOG_USER);
//return process();
return process_skip_rows();
// return process_skip_rows();
//return process_interlaced();
return process_test();
}