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try to fix unmap error,automatically unmapped don't work ?

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This commit is contained in:
Jacek Jendrzej
2019-01-14 10:44:13 +01:00
parent cf1884f1fc
commit 97db720210
1 changed files with 8 additions and 2 deletions
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10
libarmbox/video.cpp
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@@ -1017,7 +1017,7 @@ void get_osd_buf(unsigned char *osd_data)
struct fb_fix_screeninfo fix_screeninfo;
struct fb_var_screeninfo var_screeninfo;
int fb=open("/dev/fb/0", O_RDWR);
int fb=open("/dev/fb/0", O_RDONLY);
if (fb == -1)
{
fprintf(stderr, "Framebuffer failed\n");
@@ -1038,7 +1038,7 @@ void get_osd_buf(unsigned char *osd_data)
return;
}
void *lfb = (unsigned char*)mmap(0, fix_screeninfo.smem_len, PROT_READ | PROT_WRITE, MAP_SHARED, fb, 0);
void *lfb = (unsigned char*)mmap(0, fix_screeninfo.smem_len, PROT_READ , MAP_SHARED, fb, 0);
if(lfb == MAP_FAILED)
{
fprintf(stderr, "Framebuffer: <Memmapping failed>\n");
@@ -1052,6 +1052,12 @@ void get_osd_buf(unsigned char *osd_data)
// get 32bit framebuffer
memcpy(osd_data,lfb,fix_screeninfo.line_length*var_screeninfo.yres);
}
if (munmap(lfb, fix_screeninfo.smem_len) == -1)
{
perror("Error un-mmapping");
}
close(fb);
}