Lines Matching full:video
3 * uvc_video.c -- USB Video Class Gadget driver
14 #include <linux/usb/video.h>
24 * Video codecs
28 uvc_video_encode_header(struct uvc_video *video, struct uvc_buffer *buf, in uvc_video_encode_header() argument
31 struct uvc_device *uvc = container_of(video, struct uvc_device, video); in uvc_video_encode_header()
36 data[1] = UVC_STREAM_EOH | video->fid; in uvc_video_encode_header()
38 if (video->queue.flags & UVC_QUEUE_DROP_INCOMPLETE) in uvc_video_encode_header()
41 if (video->queue.buf_used == 0 && ts.tv_sec) { in uvc_video_encode_header()
65 if (buf->bytesused - video->queue.buf_used <= len - pos) in uvc_video_encode_header()
72 uvc_video_encode_data(struct uvc_video *video, struct uvc_buffer *buf, in uvc_video_encode_data() argument
75 struct uvc_video_queue *queue = &video->queue; in uvc_video_encode_data()
79 /* Copy video data to the USB buffer. */ in uvc_video_encode_data()
90 uvc_video_encode_bulk(struct usb_request *req, struct uvc_video *video, in uvc_video_encode_bulk() argument
95 int len = video->req_size; in uvc_video_encode_bulk()
99 if (video->payload_size == 0) { in uvc_video_encode_bulk()
100 ret = uvc_video_encode_header(video, buf, mem, len); in uvc_video_encode_bulk()
101 video->payload_size += ret; in uvc_video_encode_bulk()
106 /* Process video data. */ in uvc_video_encode_bulk()
107 len = min((int)(video->max_payload_size - video->payload_size), len); in uvc_video_encode_bulk()
108 ret = uvc_video_encode_data(video, buf, mem, len); in uvc_video_encode_bulk()
110 video->payload_size += ret; in uvc_video_encode_bulk()
113 req->length = video->req_size - len; in uvc_video_encode_bulk()
114 req->zero = video->payload_size == video->max_payload_size; in uvc_video_encode_bulk()
116 if (buf->bytesused == video->queue.buf_used) { in uvc_video_encode_bulk()
117 video->queue.buf_used = 0; in uvc_video_encode_bulk()
120 video->fid ^= UVC_STREAM_FID; in uvc_video_encode_bulk()
123 video->payload_size = 0; in uvc_video_encode_bulk()
126 if (video->payload_size == video->max_payload_size || in uvc_video_encode_bulk()
127 video->queue.flags & UVC_QUEUE_DROP_INCOMPLETE || in uvc_video_encode_bulk()
128 buf->bytesused == video->queue.buf_used) in uvc_video_encode_bulk()
129 video->payload_size = 0; in uvc_video_encode_bulk()
133 uvc_video_encode_isoc_sg(struct usb_request *req, struct uvc_video *video, in uvc_video_encode_isoc_sg() argument
136 unsigned int pending = buf->bytesused - video->queue.buf_used; in uvc_video_encode_isoc_sg()
139 unsigned int len = video->req_size; in uvc_video_encode_isoc_sg()
148 header_len = uvc_video_encode_header(video, buf, ureq->header, in uvc_video_encode_isoc_sg()
149 video->req_size); in uvc_video_encode_isoc_sg()
157 len + header_len : video->req_size; in uvc_video_encode_isoc_sg()
180 /* Assign the video data with header. */ in uvc_video_encode_isoc_sg()
186 video->queue.buf_used += req->length - header_len; in uvc_video_encode_isoc_sg()
188 if (buf->bytesused == video->queue.buf_used || !buf->sg || in uvc_video_encode_isoc_sg()
189 video->queue.flags & UVC_QUEUE_DROP_INCOMPLETE) { in uvc_video_encode_isoc_sg()
190 video->queue.buf_used = 0; in uvc_video_encode_isoc_sg()
194 video->fid ^= UVC_STREAM_FID; in uvc_video_encode_isoc_sg()
200 uvc_video_encode_isoc(struct usb_request *req, struct uvc_video *video, in uvc_video_encode_isoc() argument
205 int len = video->req_size; in uvc_video_encode_isoc()
209 ret = uvc_video_encode_header(video, buf, mem, len); in uvc_video_encode_isoc()
213 /* Process video data. */ in uvc_video_encode_isoc()
214 ret = uvc_video_encode_data(video, buf, mem, len); in uvc_video_encode_isoc()
217 req->length = video->req_size - len; in uvc_video_encode_isoc()
219 if (buf->bytesused == video->queue.buf_used || in uvc_video_encode_isoc()
220 video->queue.flags & UVC_QUEUE_DROP_INCOMPLETE) { in uvc_video_encode_isoc()
221 video->queue.buf_used = 0; in uvc_video_encode_isoc()
224 video->fid ^= UVC_STREAM_FID; in uvc_video_encode_isoc()
233 static int uvcg_video_ep_queue(struct uvc_video *video, struct usb_request *req) in uvcg_video_ep_queue() argument
237 ret = usb_ep_queue(video->ep, req, GFP_ATOMIC); in uvcg_video_ep_queue()
239 uvcg_err(&video->uvc->func, "Failed to queue request (%d).\n", in uvcg_video_ep_queue()
243 if (video->ep->desc) { in uvcg_video_ep_queue()
245 if (usb_endpoint_xfer_bulk(video->ep->desc)) in uvcg_video_ep_queue()
246 usb_ep_set_halt(video->ep); in uvcg_video_ep_queue()
257 struct uvc_video *video = ureq->video; in uvc_video_complete() local
258 struct uvc_video_queue *queue = &video->queue; in uvc_video_complete()
259 struct uvc_device *uvc = video->uvc; in uvc_video_complete()
267 uvcg_dbg(&video->uvc->func, "VS request missed xfer.\n"); in uvc_video_complete()
272 uvcg_dbg(&video->uvc->func, "VS request cancelled.\n"); in uvc_video_complete()
277 uvcg_warn(&video->uvc->func, in uvc_video_complete()
284 uvcg_complete_buffer(&video->queue, ureq->last_buf); in uvc_video_complete()
288 spin_lock_irqsave(&video->req_lock, flags); in uvc_video_complete()
289 list_add_tail(&req->list, &video->req_free); in uvc_video_complete()
290 spin_unlock_irqrestore(&video->req_lock, flags); in uvc_video_complete()
293 queue_work(video->async_wq, &video->pump); in uvc_video_complete()
297 uvc_video_free_requests(struct uvc_video *video) in uvc_video_free_requests() argument
301 if (video->ureq) { in uvc_video_free_requests()
302 for (i = 0; i < video->uvc_num_requests; ++i) { in uvc_video_free_requests()
303 sg_free_table(&video->ureq[i].sgt); in uvc_video_free_requests()
305 if (video->ureq[i].req) { in uvc_video_free_requests()
306 usb_ep_free_request(video->ep, video->ureq[i].req); in uvc_video_free_requests()
307 video->ureq[i].req = NULL; in uvc_video_free_requests()
310 if (video->ureq[i].req_buffer) { in uvc_video_free_requests()
311 kfree(video->ureq[i].req_buffer); in uvc_video_free_requests()
312 video->ureq[i].req_buffer = NULL; in uvc_video_free_requests()
316 kfree(video->ureq); in uvc_video_free_requests()
317 video->ureq = NULL; in uvc_video_free_requests()
320 INIT_LIST_HEAD(&video->req_free); in uvc_video_free_requests()
321 video->req_size = 0; in uvc_video_free_requests()
326 uvc_video_alloc_requests(struct uvc_video *video) in uvc_video_alloc_requests() argument
332 BUG_ON(video->req_size); in uvc_video_alloc_requests()
334 req_size = video->ep->maxpacket in uvc_video_alloc_requests()
335 * max_t(unsigned int, video->ep->maxburst, 1) in uvc_video_alloc_requests()
336 * (video->ep->mult); in uvc_video_alloc_requests()
338 video->ureq = kcalloc(video->uvc_num_requests, sizeof(struct uvc_request), GFP_KERNEL); in uvc_video_alloc_requests()
339 if (video->ureq == NULL) in uvc_video_alloc_requests()
342 for (i = 0; i < video->uvc_num_requests; ++i) { in uvc_video_alloc_requests()
343 video->ureq[i].req_buffer = kmalloc(req_size, GFP_KERNEL); in uvc_video_alloc_requests()
344 if (video->ureq[i].req_buffer == NULL) in uvc_video_alloc_requests()
347 video->ureq[i].req = usb_ep_alloc_request(video->ep, GFP_KERNEL); in uvc_video_alloc_requests()
348 if (video->ureq[i].req == NULL) in uvc_video_alloc_requests()
351 video->ureq[i].req->buf = video->ureq[i].req_buffer; in uvc_video_alloc_requests()
352 video->ureq[i].req->length = 0; in uvc_video_alloc_requests()
353 video->ureq[i].req->complete = uvc_video_complete; in uvc_video_alloc_requests()
354 video->ureq[i].req->context = &video->ureq[i]; in uvc_video_alloc_requests()
355 video->ureq[i].video = video; in uvc_video_alloc_requests()
356 video->ureq[i].last_buf = NULL; in uvc_video_alloc_requests()
358 list_add_tail(&video->ureq[i].req->list, &video->req_free); in uvc_video_alloc_requests()
360 sg_alloc_table(&video->ureq[i].sgt, in uvc_video_alloc_requests()
365 video->req_size = req_size; in uvc_video_alloc_requests()
370 uvc_video_free_requests(video); in uvc_video_alloc_requests()
375 * Video streaming
379 * uvcg_video_pump - Pump video data into the USB requests
382 * video data from the queued buffers.
386 struct uvc_video *video = container_of(work, struct uvc_video, pump); in uvcg_video_pump() local
387 struct uvc_video_queue *queue = &video->queue; in uvcg_video_pump()
388 /* video->max_payload_size is only set when using bulk transfer */ in uvcg_video_pump()
389 bool is_bulk = video->max_payload_size; in uvcg_video_pump()
396 while (video->ep->enabled) { in uvcg_video_pump()
401 spin_lock_irqsave(&video->req_lock, flags); in uvcg_video_pump()
402 if (list_empty(&video->req_free)) { in uvcg_video_pump()
403 spin_unlock_irqrestore(&video->req_lock, flags); in uvcg_video_pump()
406 req = list_first_entry(&video->req_free, struct usb_request, in uvcg_video_pump()
409 spin_unlock_irqrestore(&video->req_lock, flags); in uvcg_video_pump()
412 * Retrieve the first available video buffer and fill the in uvcg_video_pump()
413 * request, protected by the video queue irqlock. in uvcg_video_pump()
419 video->encode(req, video, buf); in uvcg_video_pump()
423 * No video buffer available; the queue is still connected and in uvcg_video_pump()
431 * Either the queue has been disconnected or no video buffer in uvcg_video_pump()
448 * - When this is request is the last request for the video in uvcg_video_pump()
449 * buffer, as we want to start sending the next video buffer in uvcg_video_pump()
454 * indicated by video->uvc_num_requests), as a trade-off in uvcg_video_pump()
457 if (list_empty(&video->req_free) || buf_done || in uvcg_video_pump()
458 !(video->req_int_count % in uvcg_video_pump()
459 DIV_ROUND_UP(video->uvc_num_requests, 4))) { in uvcg_video_pump()
460 video->req_int_count = 0; in uvcg_video_pump()
467 ret = uvcg_video_ep_queue(video, req); in uvcg_video_pump()
477 video->req_int_count++; in uvcg_video_pump()
483 spin_lock_irqsave(&video->req_lock, flags); in uvcg_video_pump()
484 list_add_tail(&req->list, &video->req_free); in uvcg_video_pump()
485 spin_unlock_irqrestore(&video->req_lock, flags); in uvcg_video_pump()
490 * Enable or disable the video stream.
492 int uvcg_video_enable(struct uvc_video *video, int enable) in uvcg_video_enable() argument
497 if (video->ep == NULL) { in uvcg_video_enable()
498 uvcg_info(&video->uvc->func, in uvcg_video_enable()
499 "Video enable failed, device is uninitialized.\n"); in uvcg_video_enable()
504 cancel_work_sync(&video->pump); in uvcg_video_enable()
505 uvcg_queue_cancel(&video->queue, 0); in uvcg_video_enable()
507 for (i = 0; i < video->uvc_num_requests; ++i) in uvcg_video_enable()
508 if (video->ureq && video->ureq[i].req) in uvcg_video_enable()
509 usb_ep_dequeue(video->ep, video->ureq[i].req); in uvcg_video_enable()
511 uvc_video_free_requests(video); in uvcg_video_enable()
512 uvcg_queue_enable(&video->queue, 0); in uvcg_video_enable()
516 if ((ret = uvcg_queue_enable(&video->queue, 1)) < 0) in uvcg_video_enable()
519 if ((ret = uvc_video_alloc_requests(video)) < 0) in uvcg_video_enable()
522 if (video->max_payload_size) { in uvcg_video_enable()
523 video->encode = uvc_video_encode_bulk; in uvcg_video_enable()
524 video->payload_size = 0; in uvcg_video_enable()
526 video->encode = video->queue.use_sg ? in uvcg_video_enable()
529 video->req_int_count = 0; in uvcg_video_enable()
531 queue_work(video->async_wq, &video->pump); in uvcg_video_enable()
537 * Initialize the UVC video stream.
539 int uvcg_video_init(struct uvc_video *video, struct uvc_device *uvc) in uvcg_video_init() argument
541 INIT_LIST_HEAD(&video->req_free); in uvcg_video_init()
542 spin_lock_init(&video->req_lock); in uvcg_video_init()
543 INIT_WORK(&video->pump, uvcg_video_pump); in uvcg_video_init()
545 /* Allocate a work queue for asynchronous video pump handler. */ in uvcg_video_init()
546 video->async_wq = alloc_workqueue("uvcgadget", WQ_UNBOUND | WQ_HIGHPRI, 0); in uvcg_video_init()
547 if (!video->async_wq) in uvcg_video_init()
550 video->uvc = uvc; in uvcg_video_init()
551 video->fcc = V4L2_PIX_FMT_YUYV; in uvcg_video_init()
552 video->bpp = 16; in uvcg_video_init()
553 video->width = 320; in uvcg_video_init()
554 video->height = 240; in uvcg_video_init()
555 video->imagesize = 320 * 240 * 2; in uvcg_video_init()
557 /* Initialize the video buffers queue. */ in uvcg_video_init()
558 uvcg_queue_init(&video->queue, uvc->v4l2_dev.dev->parent, in uvcg_video_init()
559 V4L2_BUF_TYPE_VIDEO_OUTPUT, &video->mutex); in uvcg_video_init()