static int alloc(struct vidsrc_st **stp, const struct vidsrc *vs,
struct media_ctx **ctx, struct vidsrc_prm *prm,
const struct vidsz *size, const char *fmt,
const char *dev, vidsrc_frame_h *frameh,
vidsrc_error_h *errorh, void *arg)
{
struct vidsrc_st *st;
int err;
(void)ctx;
(void)prm;
(void)fmt;
(void)errorh;
if (!stp || !size || !frameh)
return EINVAL;
if (!str_isset(dev))
dev = "/dev/video0";
st = mem_zalloc(sizeof(*st), destructor);
if (!st)
return ENOMEM;
st->vs = vs;
st->fd = -1;
st->sz = *size;
st->frameh = frameh;
st->arg = arg;
st->pixfmt = 0;
err = vd_open(st, dev);
if (err)
goto out;
err = v4l2_init_device(st, dev, size->w, size->h);
if (err)
goto out;
print_video_input(st);
err = start_capturing(st);
if (err)
goto out;
st->run = true;
err = pthread_create(&st->thread, NULL, read_thread, st);
if (err) {
st->run = false;
goto out;
}
out:
if (err)
mem_deref(st);
else
*stp = st;
return err;
}
/*
* Initializes camera for streaming
*/
int init_camera(void)
{
/* Declare properties for camera */
camera.memory_mode = V4L2_MEMORY_MMAP;
camera.num_buffers = 3;
strcpy(camera.dev_name,"/dev/video0");
strcpy(camera.name,"Camera");
camera.buffers = NULL;
camera.fmt.fmt.pix.pixelformat = V4L2_PIX_FMT_YUYV;
camera.width = 640;
camera.height = 480;
/* Initialize the v4l2 capture devices */
if (v4l2_init_device(&camera) < 0) goto Error;
/* Enable streaming for the v4l2 capture devices */
if (v4l2_stream_on(&camera) < 0) goto Error;
return 0;
Error:
close_camera();
return -1;
}
