int main(int argc, char* argv[])
{
bool use_mmap = false;
int ch, max = 100000;
while ((ch = getopt(argc, argv, "hmn:")) > 0)
{
switch (ch)
{
case 'h':
usage(argv[0]);
return 0;
case 'm':
use_mmap = true;
break;
case 'n':
max = atoi(optarg);
break;
default:
break;
}
}
if (use_mmap)
test_mmap(max);
else
test_mem(max);
return (0);
}
static void do_setup_cap_buffers(int fd, buffers &b)
{
for (unsigned i = 0; i < b.bcount; i++) {
struct v4l2_plane planes[VIDEO_MAX_PLANES];
struct v4l2_buffer buf;
memset(&buf, 0, sizeof(buf));
memset(planes, 0, sizeof(planes));
buf.type = b.type;
buf.memory = b.memory;
buf.index = i;
if (b.is_mplane) {
buf.m.planes = planes;
buf.length = VIDEO_MAX_PLANES;
}
if (doioctl(fd, VIDIOC_QUERYBUF, &buf))
return;
if (b.is_mplane) {
b.num_planes = buf.length;
for (unsigned j = 0; j < b.num_planes; j++) {
struct v4l2_plane &p = b.planes[i][j];
p.length = planes[j].length;
if (b.memory == V4L2_MEMORY_MMAP) {
b.bufs[i][j] = test_mmap(NULL, p.length,
PROT_READ | PROT_WRITE, MAP_SHARED,
fd, planes[j].m.mem_offset);
if (b.bufs[i][j] == MAP_FAILED) {
fprintf(stderr, "mmap failed\n");
return;
}
}
else {
b.bufs[i][j] = calloc(1, p.length);
planes[j].m.userptr = (unsigned long)b.bufs[i][j];
}
}
}
else {
struct v4l2_plane &p = b.planes[i][0];
b.num_planes = 1;
p.length = buf.length;
if (b.memory == V4L2_MEMORY_MMAP) {
b.bufs[i][0] = test_mmap(NULL, p.length,
PROT_READ | PROT_WRITE, MAP_SHARED, fd, buf.m.offset);
if (b.bufs[i][0] == MAP_FAILED) {
fprintf(stderr, "mmap failed\n");
return;
}
}
else {
b.bufs[i][0] = calloc(1, p.length);
buf.m.userptr = (unsigned long)b.bufs[i][0];
}
}
if (doioctl(fd, VIDIOC_QBUF, &buf))
return;
}
}
