Lines Matching full:video
3 * uvc_video.c -- USB Video Class Gadget driver
14 #include <linux/usb/video.h>
25 static bool uvc_using_zero_copy(struct uvc_video *video) in uvc_using_zero_copy() argument
27 struct uvc_device *uvc = container_of(video, struct uvc_device, video); in uvc_using_zero_copy()
30 if (opts && opts->uvc_zero_copy && video->fcc != V4L2_PIX_FMT_YUYV) in uvc_using_zero_copy()
36 static void uvc_wait_req_complete(struct uvc_video *video, struct uvc_request *ureq) in uvc_wait_req_complete() argument
42 spin_lock_irqsave(&video->req_lock, flags); in uvc_wait_req_complete()
44 list_for_each_entry(req, &video->req_free, list) { in uvc_wait_req_complete()
52 spin_unlock_irqrestore(&video->req_lock, flags); in uvc_wait_req_complete()
56 uvcg_warn(&video->uvc->func, in uvc_wait_req_complete()
61 spin_unlock_irqrestore(&video->req_lock, flags); in uvc_wait_req_complete()
64 static inline bool uvc_using_zero_copy(struct uvc_video *video) in uvc_using_zero_copy() argument
69 static inline void uvc_wait_req_complete(struct uvc_video *video, struct uvc_request *ureq) in uvc_wait_req_complete() argument
74 * Video codecs
78 uvc_video_encode_header(struct uvc_video *video, struct uvc_buffer *buf, in uvc_video_encode_header() argument
81 if (uvc_using_zero_copy(video)) { in uvc_video_encode_header()
84 mem = buf->mem + video->queue.buf_used + in uvc_video_encode_header()
85 (video->queue.buf_used / (video->req_size - 2)) * 2; in uvc_video_encode_header()
88 mem[1] = UVC_STREAM_EOH | video->fid; in uvc_video_encode_header()
89 if (buf->bytesused - video->queue.buf_used <= len - 2) in uvc_video_encode_header()
96 data[1] = UVC_STREAM_EOH | video->fid; in uvc_video_encode_header()
98 if (buf->bytesused - video->queue.buf_used <= len - 2) in uvc_video_encode_header()
105 uvc_video_encode_data(struct uvc_video *video, struct uvc_buffer *buf, in uvc_video_encode_data() argument
108 struct uvc_video_queue *queue = &video->queue; in uvc_video_encode_data()
112 /* Copy video data to the USB buffer. */ in uvc_video_encode_data()
116 if (!uvc_using_zero_copy(video)) in uvc_video_encode_data()
124 uvc_video_encode_bulk(struct usb_request *req, struct uvc_video *video, in uvc_video_encode_bulk() argument
128 int len = video->req_size; in uvc_video_encode_bulk()
132 if (video->payload_size == 0) { in uvc_video_encode_bulk()
133 ret = uvc_video_encode_header(video, buf, mem, len); in uvc_video_encode_bulk()
134 video->payload_size += ret; in uvc_video_encode_bulk()
139 /* Process video data. */ in uvc_video_encode_bulk()
140 len = min((int)(video->max_payload_size - video->payload_size), len); in uvc_video_encode_bulk()
141 ret = uvc_video_encode_data(video, buf, mem, len); in uvc_video_encode_bulk()
143 video->payload_size += ret; in uvc_video_encode_bulk()
146 req->length = video->req_size - len; in uvc_video_encode_bulk()
147 req->zero = video->payload_size == video->max_payload_size; in uvc_video_encode_bulk()
149 if (buf->bytesused == video->queue.buf_used) { in uvc_video_encode_bulk()
150 video->queue.buf_used = 0; in uvc_video_encode_bulk()
152 uvcg_queue_next_buffer(&video->queue, buf); in uvc_video_encode_bulk()
153 video->fid ^= UVC_STREAM_FID; in uvc_video_encode_bulk()
155 video->payload_size = 0; in uvc_video_encode_bulk()
159 if (video->payload_size == video->max_payload_size || in uvc_video_encode_bulk()
160 buf->bytesused == video->queue.buf_used) in uvc_video_encode_bulk()
161 video->payload_size = 0; in uvc_video_encode_bulk()
165 uvc_video_encode_isoc(struct usb_request *req, struct uvc_video *video, in uvc_video_encode_isoc() argument
169 int len = video->req_size; in uvc_video_encode_isoc()
172 if (uvc_using_zero_copy(video)) in uvc_video_encode_isoc()
173 req->buf = buf->mem + video->queue.buf_used + in uvc_video_encode_isoc()
174 (video->queue.buf_used / (video->req_size - 2)) * 2; in uvc_video_encode_isoc()
177 ret = uvc_video_encode_header(video, buf, mem, len); in uvc_video_encode_isoc()
181 /* Process video data. */ in uvc_video_encode_isoc()
182 ret = uvc_video_encode_data(video, buf, mem, len); in uvc_video_encode_isoc()
185 req->length = video->req_size - len; in uvc_video_encode_isoc()
187 if (buf->bytesused == video->queue.buf_used) { in uvc_video_encode_isoc()
188 video->queue.buf_used = 0; in uvc_video_encode_isoc()
190 uvcg_queue_next_buffer(&video->queue, buf); in uvc_video_encode_isoc()
191 video->fid ^= UVC_STREAM_FID; in uvc_video_encode_isoc()
199 static int uvcg_video_ep_queue(struct uvc_video *video, struct usb_request *req) in uvcg_video_ep_queue() argument
203 ret = usb_ep_queue(video->ep, req, GFP_ATOMIC); in uvcg_video_ep_queue()
205 uvcg_err(&video->uvc->func, "Failed to queue request (%d).\n", in uvcg_video_ep_queue()
209 if (video->ep->desc) { in uvcg_video_ep_queue()
211 if (usb_endpoint_xfer_bulk(video->ep->desc)) in uvcg_video_ep_queue()
212 usb_ep_set_halt(video->ep); in uvcg_video_ep_queue()
223 struct uvc_video *video = ureq->video; in uvc_video_complete() local
224 struct uvc_video_queue *queue = &video->queue; in uvc_video_complete()
225 struct uvc_device *uvc = video->uvc; in uvc_video_complete()
233 uvcg_dbg(&video->uvc->func, "VS request cancelled.\n"); in uvc_video_complete()
238 uvcg_warn(&video->uvc->func, in uvc_video_complete()
244 spin_lock_irqsave(&video->req_lock, flags); in uvc_video_complete()
245 list_add_tail(&req->list, &video->req_free); in uvc_video_complete()
249 spin_unlock_irqrestore(&video->req_lock, flags); in uvc_video_complete()
252 schedule_work(&video->pump); in uvc_video_complete()
256 uvc_video_free_requests(struct uvc_video *video) in uvc_video_free_requests() argument
260 if (video->ureq) { in uvc_video_free_requests()
261 for (i = 0; i < video->uvc_num_requests; ++i) { in uvc_video_free_requests()
262 if (video->ureq[i].req) { in uvc_video_free_requests()
263 uvc_wait_req_complete(video, &video->ureq[i]); in uvc_video_free_requests()
264 usb_ep_free_request(video->ep, video->ureq[i].req); in uvc_video_free_requests()
265 video->ureq[i].req = NULL; in uvc_video_free_requests()
268 if (video->ureq[i].req_buffer) { in uvc_video_free_requests()
269 kfree(video->ureq[i].req_buffer); in uvc_video_free_requests()
270 video->ureq[i].req_buffer = NULL; in uvc_video_free_requests()
274 kfree(video->ureq); in uvc_video_free_requests()
275 video->ureq = NULL; in uvc_video_free_requests()
278 INIT_LIST_HEAD(&video->req_free); in uvc_video_free_requests()
279 video->req_size = 0; in uvc_video_free_requests()
284 uvc_video_alloc_requests(struct uvc_video *video) in uvc_video_alloc_requests() argument
290 BUG_ON(video->req_size); in uvc_video_alloc_requests()
292 if (!usb_endpoint_xfer_bulk(video->ep->desc)) { in uvc_video_alloc_requests()
293 req_size = video->ep->maxpacket in uvc_video_alloc_requests()
294 * max_t(unsigned int, video->ep->maxburst, 1) in uvc_video_alloc_requests()
295 * (video->ep->mult); in uvc_video_alloc_requests()
297 req_size = video->ep->maxpacket in uvc_video_alloc_requests()
298 * max_t(unsigned int, video->ep->maxburst, 1); in uvc_video_alloc_requests()
301 video->ureq = kcalloc(video->uvc_num_requests, sizeof(struct uvc_request), GFP_KERNEL); in uvc_video_alloc_requests()
302 if (video->ureq == NULL) in uvc_video_alloc_requests()
305 for (i = 0; i < video->uvc_num_requests; ++i) { in uvc_video_alloc_requests()
306 video->ureq[i].req_buffer = kmalloc(req_size, GFP_KERNEL); in uvc_video_alloc_requests()
307 if (video->ureq[i].req_buffer == NULL) in uvc_video_alloc_requests()
310 video->ureq[i].req = usb_ep_alloc_request(video->ep, GFP_KERNEL); in uvc_video_alloc_requests()
311 if (video->ureq[i].req == NULL) in uvc_video_alloc_requests()
314 video->ureq[i].req->buf = video->ureq[i].req_buffer; in uvc_video_alloc_requests()
315 video->ureq[i].req->length = 0; in uvc_video_alloc_requests()
316 video->ureq[i].req->complete = uvc_video_complete; in uvc_video_alloc_requests()
317 video->ureq[i].req->context = &video->ureq[i]; in uvc_video_alloc_requests()
318 video->ureq[i].video = video; in uvc_video_alloc_requests()
321 init_completion(&video->ureq[i].req_done); in uvc_video_alloc_requests()
323 list_add_tail(&video->ureq[i].req->list, &video->req_free); in uvc_video_alloc_requests()
326 video->req_size = req_size; in uvc_video_alloc_requests()
331 uvc_video_free_requests(video); in uvc_video_alloc_requests()
336 * Video streaming
340 * uvcg_video_pump - Pump video data into the USB requests
343 * video data from the queued buffers.
347 struct uvc_video *video = container_of(work, struct uvc_video, pump); in uvcg_video_pump() local
348 struct uvc_video_queue *queue = &video->queue; in uvcg_video_pump()
354 while (video->ep->enabled) { in uvcg_video_pump()
358 spin_lock_irqsave(&video->req_lock, flags); in uvcg_video_pump()
359 if (list_empty(&video->req_free)) { in uvcg_video_pump()
360 spin_unlock_irqrestore(&video->req_lock, flags); in uvcg_video_pump()
363 req = list_first_entry(&video->req_free, struct usb_request, in uvcg_video_pump()
366 spin_unlock_irqrestore(&video->req_lock, flags); in uvcg_video_pump()
368 /* Retrieve the first available video buffer and fill the in uvcg_video_pump()
369 * request, protected by the video queue irqlock. in uvcg_video_pump()
378 video->encode(req, video, buf); in uvcg_video_pump()
381 ret = uvcg_video_ep_queue(video, req); in uvcg_video_pump()
396 spin_lock_irqsave(&video->req_lock, flags); in uvcg_video_pump()
397 list_add_tail(&req->list, &video->req_free); in uvcg_video_pump()
398 spin_unlock_irqrestore(&video->req_lock, flags); in uvcg_video_pump()
403 * Enable or disable the video stream.
405 int uvcg_video_enable(struct uvc_video *video, int enable) in uvcg_video_enable() argument
412 if (video->ep == NULL) { in uvcg_video_enable()
413 uvcg_info(&video->uvc->func, in uvcg_video_enable()
414 "Video enable failed, device is uninitialized.\n"); in uvcg_video_enable()
418 uvc = container_of(video, struct uvc_device, video); in uvcg_video_enable()
422 cancel_work_sync(&video->pump); in uvcg_video_enable()
423 uvcg_queue_cancel(&video->queue, 0); in uvcg_video_enable()
425 for (i = 0; i < video->uvc_num_requests; ++i) in uvcg_video_enable()
426 if (video->ureq && video->ureq[i].req) in uvcg_video_enable()
427 usb_ep_dequeue(video->ep, video->ureq[i].req); in uvcg_video_enable()
429 uvc_video_free_requests(video); in uvcg_video_enable()
430 uvcg_queue_enable(&video->queue, 0); in uvcg_video_enable()
437 if ((ret = uvcg_queue_enable(&video->queue, 1)) < 0) in uvcg_video_enable()
440 if ((ret = uvc_video_alloc_requests(video)) < 0) in uvcg_video_enable()
443 if (video->max_payload_size) { in uvcg_video_enable()
444 video->encode = uvc_video_encode_bulk; in uvcg_video_enable()
445 video->payload_size = 0; in uvcg_video_enable()
447 video->encode = uvc_video_encode_isoc; in uvcg_video_enable()
449 schedule_work(&video->pump); in uvcg_video_enable()
455 * Initialize the UVC video stream.
457 int uvcg_video_init(struct uvc_video *video, struct uvc_device *uvc) in uvcg_video_init() argument
459 INIT_LIST_HEAD(&video->req_free); in uvcg_video_init()
460 spin_lock_init(&video->req_lock); in uvcg_video_init()
461 INIT_WORK(&video->pump, uvcg_video_pump); in uvcg_video_init()
463 video->uvc = uvc; in uvcg_video_init()
464 video->fcc = V4L2_PIX_FMT_YUYV; in uvcg_video_init()
465 video->bpp = 16; in uvcg_video_init()
466 video->width = 320; in uvcg_video_init()
467 video->height = 240; in uvcg_video_init()
468 video->imagesize = 320 * 240 * 2; in uvcg_video_init()
470 /* Initialize the video buffers queue. */ in uvcg_video_init()
471 uvcg_queue_init(&video->queue, V4L2_BUF_TYPE_VIDEO_OUTPUT, in uvcg_video_init()
472 &video->mutex); in uvcg_video_init()