Lines Matching full:video
3 * uvc_video.c -- USB Video Class Gadget driver
14 #include <linux/usb/video.h>
23 * Video codecs
27 uvc_video_encode_header(struct uvc_video *video, struct uvc_buffer *buf, in uvc_video_encode_header() argument
31 data[1] = UVC_STREAM_EOH | video->fid; in uvc_video_encode_header()
33 if (buf->bytesused - video->queue.buf_used <= len - UVCG_REQUEST_HEADER_LEN) in uvc_video_encode_header()
40 uvc_video_encode_data(struct uvc_video *video, struct uvc_buffer *buf, in uvc_video_encode_data() argument
43 struct uvc_video_queue *queue = &video->queue; in uvc_video_encode_data()
47 /* Copy video data to the USB buffer. */ in uvc_video_encode_data()
58 uvc_video_encode_bulk(struct usb_request *req, struct uvc_video *video, in uvc_video_encode_bulk() argument
62 int len = video->req_size; in uvc_video_encode_bulk()
66 if (video->payload_size == 0) { in uvc_video_encode_bulk()
67 ret = uvc_video_encode_header(video, buf, mem, len); in uvc_video_encode_bulk()
68 video->payload_size += ret; in uvc_video_encode_bulk()
73 /* Process video data. */ in uvc_video_encode_bulk()
74 len = min((int)(video->max_payload_size - video->payload_size), len); in uvc_video_encode_bulk()
75 ret = uvc_video_encode_data(video, buf, mem, len); in uvc_video_encode_bulk()
77 video->payload_size += ret; in uvc_video_encode_bulk()
80 req->length = video->req_size - len; in uvc_video_encode_bulk()
81 req->zero = video->payload_size == video->max_payload_size; in uvc_video_encode_bulk()
83 if (buf->bytesused == video->queue.buf_used) { in uvc_video_encode_bulk()
84 video->queue.buf_used = 0; in uvc_video_encode_bulk()
86 uvcg_queue_next_buffer(&video->queue, buf); in uvc_video_encode_bulk()
87 video->fid ^= UVC_STREAM_FID; in uvc_video_encode_bulk()
89 video->payload_size = 0; in uvc_video_encode_bulk()
92 if (video->payload_size == video->max_payload_size || in uvc_video_encode_bulk()
93 buf->bytesused == video->queue.buf_used) in uvc_video_encode_bulk()
94 video->payload_size = 0; in uvc_video_encode_bulk()
98 uvc_video_encode_isoc_sg(struct usb_request *req, struct uvc_video *video, in uvc_video_encode_isoc_sg() argument
101 unsigned int pending = buf->bytesused - video->queue.buf_used; in uvc_video_encode_isoc_sg()
104 unsigned int len = video->req_size; in uvc_video_encode_isoc_sg()
113 ret = uvc_video_encode_header(video, buf, ureq->header, in uvc_video_encode_isoc_sg()
114 video->req_size); in uvc_video_encode_isoc_sg()
122 len + UVCG_REQUEST_HEADER_LEN : video->req_size; in uvc_video_encode_isoc_sg()
145 /* Assign the video data with header. */ in uvc_video_encode_isoc_sg()
151 video->queue.buf_used += req->length - UVCG_REQUEST_HEADER_LEN; in uvc_video_encode_isoc_sg()
153 if (buf->bytesused == video->queue.buf_used || !buf->sg) { in uvc_video_encode_isoc_sg()
154 video->queue.buf_used = 0; in uvc_video_encode_isoc_sg()
157 uvcg_queue_next_buffer(&video->queue, buf); in uvc_video_encode_isoc_sg()
158 video->fid ^= UVC_STREAM_FID; in uvc_video_encode_isoc_sg()
163 uvc_video_encode_isoc(struct usb_request *req, struct uvc_video *video, in uvc_video_encode_isoc() argument
167 int len = video->req_size; in uvc_video_encode_isoc()
171 ret = uvc_video_encode_header(video, buf, mem, len); in uvc_video_encode_isoc()
175 /* Process video data. */ in uvc_video_encode_isoc()
176 ret = uvc_video_encode_data(video, buf, mem, len); in uvc_video_encode_isoc()
179 req->length = video->req_size - len; in uvc_video_encode_isoc()
181 if (buf->bytesused == video->queue.buf_used) { in uvc_video_encode_isoc()
182 video->queue.buf_used = 0; in uvc_video_encode_isoc()
184 uvcg_queue_next_buffer(&video->queue, buf); in uvc_video_encode_isoc()
185 video->fid ^= UVC_STREAM_FID; in uvc_video_encode_isoc()
193 static int uvcg_video_ep_queue(struct uvc_video *video, struct usb_request *req) in uvcg_video_ep_queue() argument
197 ret = usb_ep_queue(video->ep, req, GFP_ATOMIC); in uvcg_video_ep_queue()
199 uvcg_err(&video->uvc->func, "Failed to queue request (%d).\n", in uvcg_video_ep_queue()
203 if (usb_endpoint_xfer_bulk(video->ep->desc)) in uvcg_video_ep_queue()
204 usb_ep_set_halt(video->ep); in uvcg_video_ep_queue()
214 struct uvc_video *video = ureq->video; in uvc_video_complete() local
215 struct uvc_video_queue *queue = &video->queue; in uvc_video_complete()
223 uvcg_dbg(&video->uvc->func, "VS request cancelled.\n"); in uvc_video_complete()
228 uvcg_info(&video->uvc->func, in uvc_video_complete()
234 spin_lock_irqsave(&video->req_lock, flags); in uvc_video_complete()
235 list_add_tail(&req->list, &video->req_free); in uvc_video_complete()
236 spin_unlock_irqrestore(&video->req_lock, flags); in uvc_video_complete()
238 schedule_work(&video->pump); in uvc_video_complete()
242 uvc_video_free_requests(struct uvc_video *video) in uvc_video_free_requests() argument
246 if (video->ureq) { in uvc_video_free_requests()
247 for (i = 0; i < video->uvc_num_requests; ++i) { in uvc_video_free_requests()
248 sg_free_table(&video->ureq[i].sgt); in uvc_video_free_requests()
250 if (video->ureq[i].req) { in uvc_video_free_requests()
251 usb_ep_free_request(video->ep, video->ureq[i].req); in uvc_video_free_requests()
252 video->ureq[i].req = NULL; in uvc_video_free_requests()
255 if (video->ureq[i].req_buffer) { in uvc_video_free_requests()
256 kfree(video->ureq[i].req_buffer); in uvc_video_free_requests()
257 video->ureq[i].req_buffer = NULL; in uvc_video_free_requests()
261 kfree(video->ureq); in uvc_video_free_requests()
262 video->ureq = NULL; in uvc_video_free_requests()
265 INIT_LIST_HEAD(&video->req_free); in uvc_video_free_requests()
266 video->req_size = 0; in uvc_video_free_requests()
271 uvc_video_alloc_requests(struct uvc_video *video) in uvc_video_alloc_requests() argument
277 BUG_ON(video->req_size); in uvc_video_alloc_requests()
279 req_size = video->ep->maxpacket in uvc_video_alloc_requests()
280 * max_t(unsigned int, video->ep->maxburst, 1) in uvc_video_alloc_requests()
281 * (video->ep->mult); in uvc_video_alloc_requests()
283 video->ureq = kcalloc(video->uvc_num_requests, sizeof(struct uvc_request), GFP_KERNEL); in uvc_video_alloc_requests()
284 if (video->ureq == NULL) in uvc_video_alloc_requests()
287 for (i = 0; i < video->uvc_num_requests; ++i) { in uvc_video_alloc_requests()
288 video->ureq[i].req_buffer = kmalloc(req_size, GFP_KERNEL); in uvc_video_alloc_requests()
289 if (video->ureq[i].req_buffer == NULL) in uvc_video_alloc_requests()
292 video->ureq[i].req = usb_ep_alloc_request(video->ep, GFP_KERNEL); in uvc_video_alloc_requests()
293 if (video->ureq[i].req == NULL) in uvc_video_alloc_requests()
296 video->ureq[i].req->buf = video->ureq[i].req_buffer; in uvc_video_alloc_requests()
297 video->ureq[i].req->length = 0; in uvc_video_alloc_requests()
298 video->ureq[i].req->complete = uvc_video_complete; in uvc_video_alloc_requests()
299 video->ureq[i].req->context = &video->ureq[i]; in uvc_video_alloc_requests()
300 video->ureq[i].video = video; in uvc_video_alloc_requests()
302 list_add_tail(&video->ureq[i].req->list, &video->req_free); in uvc_video_alloc_requests()
304 sg_alloc_table(&video->ureq[i].sgt, in uvc_video_alloc_requests()
309 video->req_size = req_size; in uvc_video_alloc_requests()
314 uvc_video_free_requests(video); in uvc_video_alloc_requests()
319 * Video streaming
323 * uvcg_video_pump - Pump video data into the USB requests
326 * video data from the queued buffers.
330 struct uvc_video *video = container_of(work, struct uvc_video, pump); in uvcg_video_pump() local
331 struct uvc_video_queue *queue = &video->queue; in uvcg_video_pump()
341 spin_lock_irqsave(&video->req_lock, flags); in uvcg_video_pump()
342 if (list_empty(&video->req_free)) { in uvcg_video_pump()
343 spin_unlock_irqrestore(&video->req_lock, flags); in uvcg_video_pump()
346 req = list_first_entry(&video->req_free, struct usb_request, in uvcg_video_pump()
349 spin_unlock_irqrestore(&video->req_lock, flags); in uvcg_video_pump()
351 /* Retrieve the first available video buffer and fill the in uvcg_video_pump()
352 * request, protected by the video queue irqlock. in uvcg_video_pump()
361 video->encode(req, video, buf); in uvcg_video_pump()
366 if (list_empty(&video->req_free) || in uvcg_video_pump()
368 !(video->req_int_count % in uvcg_video_pump()
369 DIV_ROUND_UP(video->uvc_num_requests, 4))) { in uvcg_video_pump()
370 video->req_int_count = 0; in uvcg_video_pump()
377 ret = uvcg_video_ep_queue(video, req); in uvcg_video_pump()
384 video->req_int_count++; in uvcg_video_pump()
387 spin_lock_irqsave(&video->req_lock, flags); in uvcg_video_pump()
388 list_add_tail(&req->list, &video->req_free); in uvcg_video_pump()
389 spin_unlock_irqrestore(&video->req_lock, flags); in uvcg_video_pump()
394 * Enable or disable the video stream.
396 int uvcg_video_enable(struct uvc_video *video, int enable) in uvcg_video_enable() argument
401 if (video->ep == NULL) { in uvcg_video_enable()
402 uvcg_info(&video->uvc->func, in uvcg_video_enable()
403 "Video enable failed, device is uninitialized.\n"); in uvcg_video_enable()
408 cancel_work_sync(&video->pump); in uvcg_video_enable()
409 uvcg_queue_cancel(&video->queue, 0); in uvcg_video_enable()
411 for (i = 0; i < video->uvc_num_requests; ++i) in uvcg_video_enable()
412 if (video->ureq && video->ureq[i].req) in uvcg_video_enable()
413 usb_ep_dequeue(video->ep, video->ureq[i].req); in uvcg_video_enable()
415 uvc_video_free_requests(video); in uvcg_video_enable()
416 uvcg_queue_enable(&video->queue, 0); in uvcg_video_enable()
420 if ((ret = uvcg_queue_enable(&video->queue, 1)) < 0) in uvcg_video_enable()
423 if ((ret = uvc_video_alloc_requests(video)) < 0) in uvcg_video_enable()
426 if (video->max_payload_size) { in uvcg_video_enable()
427 video->encode = uvc_video_encode_bulk; in uvcg_video_enable()
428 video->payload_size = 0; in uvcg_video_enable()
430 video->encode = video->queue.use_sg ? in uvcg_video_enable()
433 video->req_int_count = 0; in uvcg_video_enable()
435 schedule_work(&video->pump); in uvcg_video_enable()
441 * Initialize the UVC video stream.
443 int uvcg_video_init(struct uvc_video *video, struct uvc_device *uvc) in uvcg_video_init() argument
445 INIT_LIST_HEAD(&video->req_free); in uvcg_video_init()
446 spin_lock_init(&video->req_lock); in uvcg_video_init()
447 INIT_WORK(&video->pump, uvcg_video_pump); in uvcg_video_init()
449 video->uvc = uvc; in uvcg_video_init()
450 video->fcc = V4L2_PIX_FMT_YUYV; in uvcg_video_init()
451 video->bpp = 16; in uvcg_video_init()
452 video->width = 320; in uvcg_video_init()
453 video->height = 240; in uvcg_video_init()
454 video->imagesize = 320 * 240 * 2; in uvcg_video_init()
456 /* Initialize the video buffers queue. */ in uvcg_video_init()
457 uvcg_queue_init(&video->queue, uvc->v4l2_dev.dev->parent, in uvcg_video_init()
458 V4L2_BUF_TYPE_VIDEO_OUTPUT, &video->mutex); in uvcg_video_init()