static int myvivi_open(struct file * file)
{
/*队列操作2: 初始化*/
videobuf_queue_vmalloc_init(&myvivi_vb_vidqueue, &myvivi_video_qops,
NULL, &myvivi_queue_slock, V4L2_BUF_TYPE_VIDEO_CAPTURE, V4L2_FIELD_INTERLACED,
sizeof(struct videobuf_buffer), NULL);
return 0;
}
static void cx18_stream_init(struct cx18 *cx, int type)
{
struct cx18_stream *s = &cx->streams[type];
struct video_device *video_dev = s->video_dev;
/* we need to keep video_dev, so restore it afterwards */
memset(s, 0, sizeof(*s));
s->video_dev = video_dev;
/* initialize cx18_stream fields */
s->dvb = NULL;
s->cx = cx;
s->type = type;
s->name = cx18_stream_info[type].name;
s->handle = CX18_INVALID_TASK_HANDLE;
s->dma = cx18_stream_info[type].dma;
s->buffers = cx->stream_buffers[type];
s->buf_size = cx->stream_buf_size[type];
INIT_LIST_HEAD(&s->buf_pool);
s->bufs_per_mdl = 1;
s->mdl_size = s->buf_size * s->bufs_per_mdl;
init_waitqueue_head(&s->waitq);
s->id = -1;
spin_lock_init(&s->q_free.lock);
cx18_queue_init(&s->q_free);
spin_lock_init(&s->q_busy.lock);
cx18_queue_init(&s->q_busy);
spin_lock_init(&s->q_full.lock);
cx18_queue_init(&s->q_full);
spin_lock_init(&s->q_idle.lock);
cx18_queue_init(&s->q_idle);
INIT_WORK(&s->out_work_order, cx18_out_work_handler);
INIT_LIST_HEAD(&s->vb_capture);
s->vb_timeout.function = cx18_vb_timeout;
s->vb_timeout.data = (unsigned long)s;
init_timer(&s->vb_timeout);
spin_lock_init(&s->vb_lock);
if (type == CX18_ENC_STREAM_TYPE_YUV) {
spin_lock_init(&s->vbuf_q_lock);
s->vb_type = V4L2_BUF_TYPE_VIDEO_CAPTURE;
videobuf_queue_vmalloc_init(&s->vbuf_q, &cx18_videobuf_qops,
&cx->pci_dev->dev, &s->vbuf_q_lock,
V4L2_BUF_TYPE_VIDEO_CAPTURE,
V4L2_FIELD_INTERLACED,
sizeof(struct cx18_videobuf_buffer),
s, &cx->serialize_lock);
/* Assume the previous pixel default */
s->pixelformat = V4L2_PIX_FMT_HM12;
}
}
static void cx18_stream_init(struct cx18 *cx, int type)
{
struct cx18_stream *s = &cx->streams[type];
memset(s, 0, sizeof(*s));
/* initialize cx18_stream fields */
s->dvb = NULL;
s->cx = cx;
s->type = type;
s->name = cx18_stream_info[type].name;
s->handle = CX18_INVALID_TASK_HANDLE;
s->dma = cx18_stream_info[type].dma;
s->v4l2_dev_caps = cx18_stream_info[type].caps;
s->buffers = cx->stream_buffers[type];
s->buf_size = cx->stream_buf_size[type];
INIT_LIST_HEAD(&s->buf_pool);
s->bufs_per_mdl = 1;
s->mdl_size = s->buf_size * s->bufs_per_mdl;
init_waitqueue_head(&s->waitq);
s->id = -1;
spin_lock_init(&s->q_free.lock);
cx18_queue_init(&s->q_free);
spin_lock_init(&s->q_busy.lock);
cx18_queue_init(&s->q_busy);
spin_lock_init(&s->q_full.lock);
cx18_queue_init(&s->q_full);
spin_lock_init(&s->q_idle.lock);
cx18_queue_init(&s->q_idle);
INIT_WORK(&s->out_work_order, cx18_out_work_handler);
INIT_LIST_HEAD(&s->vb_capture);
timer_setup(&s->vb_timeout, cx18_vb_timeout, 0);
spin_lock_init(&s->vb_lock);
if (type == CX18_ENC_STREAM_TYPE_YUV) {
spin_lock_init(&s->vbuf_q_lock);
s->vb_type = V4L2_BUF_TYPE_VIDEO_CAPTURE;
videobuf_queue_vmalloc_init(&s->vbuf_q, &cx18_videobuf_qops,
&cx->pci_dev->dev, &s->vbuf_q_lock,
V4L2_BUF_TYPE_VIDEO_CAPTURE,
V4L2_FIELD_INTERLACED,
sizeof(struct cx18_videobuf_buffer),
s, &cx->serialize_lock);
/* Assume the previous pixel default */
s->pixelformat = V4L2_PIX_FMT_HM12;
s->vb_bytes_per_frame = cx->cxhdl.height * 720 * 3 / 2;
s->vb_bytes_per_line = 720;
}
}
//在open函数中初始化buffer队列
static int myvivi_open(struct file *filp)
{ //2.2，队列操作--队列初始化
#if 0
videobuf_queue_vmalloc_init(&myvivi_vb_vidqueue, &myvivi_video_qops,
NULL, &myvivi_queue_slock,V4L2_BUF_TYPE_VIDEO_CAPTURE,
V4L2_FIELD_INTERLACED,sizeof(myvivi_vb_vidqueue), NULL,NULL);
#endif
//只有真正用到时才放到内核中去，这里会用到则加定时器:
myvivi_timer.expires = jiff ies + 1;//超时时间
add_timer(&myvivi_timer);
memset(&myvivi_vb_vidqueue, 0, sizeof(myvivi_vb_vidqueue));
return 0;
}
