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1da177e4 LT |
1 | /* |
2 | * This program is free software; you can redistribute it and/or modify | |
3 | * it under the terms of the GNU General Public License as published by | |
4 | * the Free Software Foundation; either version 2, or (at your option) | |
5 | * any later version. | |
6 | * | |
7 | * This program is distributed in the hope that it will be useful, | |
8 | * but WITHOUT ANY WARRANTY; without even the implied warranty of | |
9 | * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the | |
10 | * GNU General Public License for more details. | |
11 | * | |
12 | * You should have received a copy of the GNU General Public License | |
13 | * along with this program; if not, write to the Free Software | |
14 | * Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA. | |
15 | */ | |
16 | ||
17 | #include <linux/kernel.h> | |
18 | #include <linux/sched.h> | |
19 | #include <linux/list.h> | |
20 | #include <linux/slab.h> | |
21 | #include <linux/module.h> | |
22 | #include <linux/mm.h> | |
1da177e4 LT |
23 | #include <linux/vmalloc.h> |
24 | #include <linux/init.h> | |
25 | #include <linux/spinlock.h> | |
26 | ||
27 | #include <asm/io.h> | |
28 | ||
29 | #include "usbvideo.h" | |
30 | ||
31 | #if defined(MAP_NR) | |
32 | #define virt_to_page(v) MAP_NR(v) /* Kernels 2.2.x */ | |
33 | #endif | |
34 | ||
35 | static int video_nr = -1; | |
36 | module_param(video_nr, int, 0); | |
37 | ||
38 | /* | |
39 | * Local prototypes. | |
40 | */ | |
41 | static void usbvideo_Disconnect(struct usb_interface *intf); | |
42 | static void usbvideo_CameraRelease(struct uvd *uvd); | |
43 | ||
44 | static int usbvideo_v4l_ioctl(struct inode *inode, struct file *file, | |
45 | unsigned int cmd, unsigned long arg); | |
46 | static int usbvideo_v4l_mmap(struct file *file, struct vm_area_struct *vma); | |
47 | static int usbvideo_v4l_open(struct inode *inode, struct file *file); | |
48 | static ssize_t usbvideo_v4l_read(struct file *file, char __user *buf, | |
49 | size_t count, loff_t *ppos); | |
50 | static int usbvideo_v4l_close(struct inode *inode, struct file *file); | |
51 | ||
52 | static int usbvideo_StartDataPump(struct uvd *uvd); | |
53 | static void usbvideo_StopDataPump(struct uvd *uvd); | |
54 | static int usbvideo_GetFrame(struct uvd *uvd, int frameNum); | |
55 | static int usbvideo_NewFrame(struct uvd *uvd, int framenum); | |
56 | static void usbvideo_SoftwareContrastAdjustment(struct uvd *uvd, | |
57 | struct usbvideo_frame *frame); | |
58 | ||
59 | /*******************************/ | |
60 | /* Memory management functions */ | |
61 | /*******************************/ | |
62 | static void *usbvideo_rvmalloc(unsigned long size) | |
63 | { | |
64 | void *mem; | |
65 | unsigned long adr; | |
66 | ||
67 | size = PAGE_ALIGN(size); | |
68 | mem = vmalloc_32(size); | |
69 | if (!mem) | |
70 | return NULL; | |
71 | ||
72 | memset(mem, 0, size); /* Clear the ram out, no junk to the user */ | |
73 | adr = (unsigned long) mem; | |
74 | while (size > 0) { | |
75 | SetPageReserved(vmalloc_to_page((void *)adr)); | |
76 | adr += PAGE_SIZE; | |
77 | size -= PAGE_SIZE; | |
78 | } | |
79 | ||
80 | return mem; | |
81 | } | |
82 | ||
83 | static void usbvideo_rvfree(void *mem, unsigned long size) | |
84 | { | |
85 | unsigned long adr; | |
86 | ||
87 | if (!mem) | |
88 | return; | |
89 | ||
90 | adr = (unsigned long) mem; | |
91 | while ((long) size > 0) { | |
92 | ClearPageReserved(vmalloc_to_page((void *)adr)); | |
93 | adr += PAGE_SIZE; | |
94 | size -= PAGE_SIZE; | |
95 | } | |
96 | vfree(mem); | |
97 | } | |
98 | ||
99 | static void RingQueue_Initialize(struct RingQueue *rq) | |
100 | { | |
101 | assert(rq != NULL); | |
102 | init_waitqueue_head(&rq->wqh); | |
103 | } | |
104 | ||
105 | static void RingQueue_Allocate(struct RingQueue *rq, int rqLen) | |
106 | { | |
107 | /* Make sure the requested size is a power of 2 and | |
108 | round up if necessary. This allows index wrapping | |
109 | using masks rather than modulo */ | |
110 | ||
111 | int i = 1; | |
112 | assert(rq != NULL); | |
113 | assert(rqLen > 0); | |
114 | ||
115 | while(rqLen >> i) | |
116 | i++; | |
117 | if(rqLen != 1 << (i-1)) | |
118 | rqLen = 1 << i; | |
119 | ||
120 | rq->length = rqLen; | |
121 | rq->ri = rq->wi = 0; | |
122 | rq->queue = usbvideo_rvmalloc(rq->length); | |
123 | assert(rq->queue != NULL); | |
124 | } | |
125 | ||
126 | static int RingQueue_IsAllocated(const struct RingQueue *rq) | |
127 | { | |
128 | if (rq == NULL) | |
129 | return 0; | |
130 | return (rq->queue != NULL) && (rq->length > 0); | |
131 | } | |
132 | ||
133 | static void RingQueue_Free(struct RingQueue *rq) | |
134 | { | |
135 | assert(rq != NULL); | |
136 | if (RingQueue_IsAllocated(rq)) { | |
137 | usbvideo_rvfree(rq->queue, rq->length); | |
138 | rq->queue = NULL; | |
139 | rq->length = 0; | |
140 | } | |
141 | } | |
142 | ||
143 | int RingQueue_Dequeue(struct RingQueue *rq, unsigned char *dst, int len) | |
144 | { | |
145 | int rql, toread; | |
146 | ||
147 | assert(rq != NULL); | |
148 | assert(dst != NULL); | |
149 | ||
150 | rql = RingQueue_GetLength(rq); | |
151 | if(!rql) | |
152 | return 0; | |
153 | ||
154 | /* Clip requested length to available data */ | |
155 | if(len > rql) | |
156 | len = rql; | |
157 | ||
158 | toread = len; | |
159 | if(rq->ri > rq->wi) { | |
160 | /* Read data from tail */ | |
161 | int read = (toread < (rq->length - rq->ri)) ? toread : rq->length - rq->ri; | |
162 | memcpy(dst, rq->queue + rq->ri, read); | |
163 | toread -= read; | |
164 | dst += read; | |
165 | rq->ri = (rq->ri + read) & (rq->length-1); | |
166 | } | |
167 | if(toread) { | |
168 | /* Read data from head */ | |
169 | memcpy(dst, rq->queue + rq->ri, toread); | |
170 | rq->ri = (rq->ri + toread) & (rq->length-1); | |
171 | } | |
172 | return len; | |
173 | } | |
174 | ||
175 | EXPORT_SYMBOL(RingQueue_Dequeue); | |
176 | ||
177 | int RingQueue_Enqueue(struct RingQueue *rq, const unsigned char *cdata, int n) | |
178 | { | |
179 | int enqueued = 0; | |
180 | ||
181 | assert(rq != NULL); | |
182 | assert(cdata != NULL); | |
183 | assert(rq->length > 0); | |
184 | while (n > 0) { | |
185 | int m, q_avail; | |
186 | ||
187 | /* Calculate the largest chunk that fits the tail of the ring */ | |
188 | q_avail = rq->length - rq->wi; | |
189 | if (q_avail <= 0) { | |
190 | rq->wi = 0; | |
191 | q_avail = rq->length; | |
192 | } | |
193 | m = n; | |
194 | assert(q_avail > 0); | |
195 | if (m > q_avail) | |
196 | m = q_avail; | |
197 | ||
198 | memcpy(rq->queue + rq->wi, cdata, m); | |
199 | RING_QUEUE_ADVANCE_INDEX(rq, wi, m); | |
200 | cdata += m; | |
201 | enqueued += m; | |
202 | n -= m; | |
203 | } | |
204 | return enqueued; | |
205 | } | |
206 | ||
207 | EXPORT_SYMBOL(RingQueue_Enqueue); | |
208 | ||
209 | static void RingQueue_InterruptibleSleepOn(struct RingQueue *rq) | |
210 | { | |
211 | assert(rq != NULL); | |
212 | interruptible_sleep_on(&rq->wqh); | |
213 | } | |
214 | ||
215 | void RingQueue_WakeUpInterruptible(struct RingQueue *rq) | |
216 | { | |
217 | assert(rq != NULL); | |
218 | if (waitqueue_active(&rq->wqh)) | |
219 | wake_up_interruptible(&rq->wqh); | |
220 | } | |
221 | ||
222 | EXPORT_SYMBOL(RingQueue_WakeUpInterruptible); | |
223 | ||
224 | void RingQueue_Flush(struct RingQueue *rq) | |
225 | { | |
226 | assert(rq != NULL); | |
227 | rq->ri = 0; | |
228 | rq->wi = 0; | |
229 | } | |
230 | ||
231 | EXPORT_SYMBOL(RingQueue_Flush); | |
232 | ||
233 | ||
234 | /* | |
235 | * usbvideo_VideosizeToString() | |
236 | * | |
237 | * This procedure converts given videosize value to readable string. | |
238 | * | |
239 | * History: | |
240 | * 07-Aug-2000 Created. | |
241 | * 19-Oct-2000 Reworked for usbvideo module. | |
242 | */ | |
243 | static void usbvideo_VideosizeToString(char *buf, int bufLen, videosize_t vs) | |
244 | { | |
245 | char tmp[40]; | |
246 | int n; | |
247 | ||
248 | n = 1 + sprintf(tmp, "%ldx%ld", VIDEOSIZE_X(vs), VIDEOSIZE_Y(vs)); | |
249 | assert(n < sizeof(tmp)); | |
250 | if ((buf == NULL) || (bufLen < n)) | |
251 | err("usbvideo_VideosizeToString: buffer is too small."); | |
252 | else | |
253 | memmove(buf, tmp, n); | |
254 | } | |
255 | ||
256 | /* | |
257 | * usbvideo_OverlayChar() | |
258 | * | |
259 | * History: | |
260 | * 01-Feb-2000 Created. | |
261 | */ | |
262 | static void usbvideo_OverlayChar(struct uvd *uvd, struct usbvideo_frame *frame, | |
263 | int x, int y, int ch) | |
264 | { | |
265 | static const unsigned short digits[16] = { | |
266 | 0xF6DE, /* 0 */ | |
267 | 0x2492, /* 1 */ | |
268 | 0xE7CE, /* 2 */ | |
269 | 0xE79E, /* 3 */ | |
270 | 0xB792, /* 4 */ | |
271 | 0xF39E, /* 5 */ | |
272 | 0xF3DE, /* 6 */ | |
273 | 0xF492, /* 7 */ | |
274 | 0xF7DE, /* 8 */ | |
275 | 0xF79E, /* 9 */ | |
276 | 0x77DA, /* a */ | |
277 | 0xD75C, /* b */ | |
278 | 0xF24E, /* c */ | |
279 | 0xD6DC, /* d */ | |
280 | 0xF34E, /* e */ | |
281 | 0xF348 /* f */ | |
282 | }; | |
283 | unsigned short digit; | |
284 | int ix, iy; | |
285 | ||
286 | if ((uvd == NULL) || (frame == NULL)) | |
287 | return; | |
288 | ||
289 | if (ch >= '0' && ch <= '9') | |
290 | ch -= '0'; | |
291 | else if (ch >= 'A' && ch <= 'F') | |
292 | ch = 10 + (ch - 'A'); | |
293 | else if (ch >= 'a' && ch <= 'f') | |
294 | ch = 10 + (ch - 'a'); | |
295 | else | |
296 | return; | |
297 | digit = digits[ch]; | |
298 | ||
299 | for (iy=0; iy < 5; iy++) { | |
300 | for (ix=0; ix < 3; ix++) { | |
301 | if (digit & 0x8000) { | |
302 | if (uvd->paletteBits & (1L << VIDEO_PALETTE_RGB24)) { | |
303 | /* TODO */ RGB24_PUTPIXEL(frame, x+ix, y+iy, 0xFF, 0xFF, 0xFF); | |
304 | } | |
305 | } | |
306 | digit = digit << 1; | |
307 | } | |
308 | } | |
309 | } | |
310 | ||
311 | /* | |
312 | * usbvideo_OverlayString() | |
313 | * | |
314 | * History: | |
315 | * 01-Feb-2000 Created. | |
316 | */ | |
317 | static void usbvideo_OverlayString(struct uvd *uvd, struct usbvideo_frame *frame, | |
318 | int x, int y, const char *str) | |
319 | { | |
320 | while (*str) { | |
321 | usbvideo_OverlayChar(uvd, frame, x, y, *str); | |
322 | str++; | |
323 | x += 4; /* 3 pixels character + 1 space */ | |
324 | } | |
325 | } | |
326 | ||
327 | /* | |
328 | * usbvideo_OverlayStats() | |
329 | * | |
330 | * Overlays important debugging information. | |
331 | * | |
332 | * History: | |
333 | * 01-Feb-2000 Created. | |
334 | */ | |
335 | static void usbvideo_OverlayStats(struct uvd *uvd, struct usbvideo_frame *frame) | |
336 | { | |
337 | const int y_diff = 8; | |
338 | char tmp[16]; | |
339 | int x = 10, y=10; | |
340 | long i, j, barLength; | |
341 | const int qi_x1 = 60, qi_y1 = 10; | |
342 | const int qi_x2 = VIDEOSIZE_X(frame->request) - 10, qi_h = 10; | |
343 | ||
344 | /* Call the user callback, see if we may proceed after that */ | |
345 | if (VALID_CALLBACK(uvd, overlayHook)) { | |
346 | if (GET_CALLBACK(uvd, overlayHook)(uvd, frame) < 0) | |
347 | return; | |
348 | } | |
349 | ||
350 | /* | |
351 | * We draw a (mostly) hollow rectangle with qi_xxx coordinates. | |
352 | * Left edge symbolizes the queue index 0; right edge symbolizes | |
353 | * the full capacity of the queue. | |
354 | */ | |
355 | barLength = qi_x2 - qi_x1 - 2; | |
356 | if ((barLength > 10) && (uvd->paletteBits & (1L << VIDEO_PALETTE_RGB24))) { | |
357 | /* TODO */ long u_lo, u_hi, q_used; | |
358 | long m_ri, m_wi, m_lo, m_hi; | |
359 | ||
360 | /* | |
361 | * Determine fill zones (used areas of the queue): | |
362 | * 0 xxxxxxx u_lo ...... uvd->dp.ri xxxxxxxx u_hi ..... uvd->dp.length | |
363 | * | |
364 | * if u_lo < 0 then there is no first filler. | |
365 | */ | |
366 | ||
367 | q_used = RingQueue_GetLength(&uvd->dp); | |
368 | if ((uvd->dp.ri + q_used) >= uvd->dp.length) { | |
369 | u_hi = uvd->dp.length; | |
370 | u_lo = (q_used + uvd->dp.ri) & (uvd->dp.length-1); | |
371 | } else { | |
372 | u_hi = (q_used + uvd->dp.ri); | |
373 | u_lo = -1; | |
374 | } | |
375 | ||
376 | /* Convert byte indices into screen units */ | |
377 | m_ri = qi_x1 + ((barLength * uvd->dp.ri) / uvd->dp.length); | |
378 | m_wi = qi_x1 + ((barLength * uvd->dp.wi) / uvd->dp.length); | |
379 | m_lo = (u_lo > 0) ? (qi_x1 + ((barLength * u_lo) / uvd->dp.length)) : -1; | |
380 | m_hi = qi_x1 + ((barLength * u_hi) / uvd->dp.length); | |
381 | ||
382 | for (j=qi_y1; j < (qi_y1 + qi_h); j++) { | |
383 | for (i=qi_x1; i < qi_x2; i++) { | |
384 | /* Draw border lines */ | |
385 | if ((j == qi_y1) || (j == (qi_y1 + qi_h - 1)) || | |
386 | (i == qi_x1) || (i == (qi_x2 - 1))) { | |
387 | RGB24_PUTPIXEL(frame, i, j, 0xFF, 0xFF, 0xFF); | |
388 | continue; | |
389 | } | |
390 | /* For all other points the Y coordinate does not matter */ | |
391 | if ((i >= m_ri) && (i <= (m_ri + 3))) { | |
392 | RGB24_PUTPIXEL(frame, i, j, 0x00, 0xFF, 0x00); | |
393 | } else if ((i >= m_wi) && (i <= (m_wi + 3))) { | |
394 | RGB24_PUTPIXEL(frame, i, j, 0xFF, 0x00, 0x00); | |
395 | } else if ((i < m_lo) || ((i > m_ri) && (i < m_hi))) | |
396 | RGB24_PUTPIXEL(frame, i, j, 0x00, 0x00, 0xFF); | |
397 | } | |
398 | } | |
399 | } | |
400 | ||
401 | sprintf(tmp, "%8lx", uvd->stats.frame_num); | |
402 | usbvideo_OverlayString(uvd, frame, x, y, tmp); | |
403 | y += y_diff; | |
404 | ||
405 | sprintf(tmp, "%8lx", uvd->stats.urb_count); | |
406 | usbvideo_OverlayString(uvd, frame, x, y, tmp); | |
407 | y += y_diff; | |
408 | ||
409 | sprintf(tmp, "%8lx", uvd->stats.urb_length); | |
410 | usbvideo_OverlayString(uvd, frame, x, y, tmp); | |
411 | y += y_diff; | |
412 | ||
413 | sprintf(tmp, "%8lx", uvd->stats.data_count); | |
414 | usbvideo_OverlayString(uvd, frame, x, y, tmp); | |
415 | y += y_diff; | |
416 | ||
417 | sprintf(tmp, "%8lx", uvd->stats.header_count); | |
418 | usbvideo_OverlayString(uvd, frame, x, y, tmp); | |
419 | y += y_diff; | |
420 | ||
421 | sprintf(tmp, "%8lx", uvd->stats.iso_skip_count); | |
422 | usbvideo_OverlayString(uvd, frame, x, y, tmp); | |
423 | y += y_diff; | |
424 | ||
425 | sprintf(tmp, "%8lx", uvd->stats.iso_err_count); | |
426 | usbvideo_OverlayString(uvd, frame, x, y, tmp); | |
427 | y += y_diff; | |
428 | ||
429 | sprintf(tmp, "%8x", uvd->vpic.colour); | |
430 | usbvideo_OverlayString(uvd, frame, x, y, tmp); | |
431 | y += y_diff; | |
432 | ||
433 | sprintf(tmp, "%8x", uvd->vpic.hue); | |
434 | usbvideo_OverlayString(uvd, frame, x, y, tmp); | |
435 | y += y_diff; | |
436 | ||
437 | sprintf(tmp, "%8x", uvd->vpic.brightness >> 8); | |
438 | usbvideo_OverlayString(uvd, frame, x, y, tmp); | |
439 | y += y_diff; | |
440 | ||
441 | sprintf(tmp, "%8x", uvd->vpic.contrast >> 12); | |
442 | usbvideo_OverlayString(uvd, frame, x, y, tmp); | |
443 | y += y_diff; | |
444 | ||
445 | sprintf(tmp, "%8d", uvd->vpic.whiteness >> 8); | |
446 | usbvideo_OverlayString(uvd, frame, x, y, tmp); | |
447 | y += y_diff; | |
448 | } | |
449 | ||
450 | /* | |
451 | * usbvideo_ReportStatistics() | |
452 | * | |
453 | * This procedure prints packet and transfer statistics. | |
454 | * | |
455 | * History: | |
456 | * 14-Jan-2000 Corrected default multiplier. | |
457 | */ | |
458 | static void usbvideo_ReportStatistics(const struct uvd *uvd) | |
459 | { | |
460 | if ((uvd != NULL) && (uvd->stats.urb_count > 0)) { | |
461 | unsigned long allPackets, badPackets, goodPackets, percent; | |
462 | allPackets = uvd->stats.urb_count * CAMERA_URB_FRAMES; | |
463 | badPackets = uvd->stats.iso_skip_count + uvd->stats.iso_err_count; | |
464 | goodPackets = allPackets - badPackets; | |
465 | /* Calculate percentage wisely, remember integer limits */ | |
466 | assert(allPackets != 0); | |
467 | if (goodPackets < (((unsigned long)-1)/100)) | |
468 | percent = (100 * goodPackets) / allPackets; | |
469 | else | |
470 | percent = goodPackets / (allPackets / 100); | |
471 | info("Packet Statistics: Total=%lu. Empty=%lu. Usage=%lu%%", | |
472 | allPackets, badPackets, percent); | |
473 | if (uvd->iso_packet_len > 0) { | |
474 | unsigned long allBytes, xferBytes; | |
475 | char multiplier = ' '; | |
476 | allBytes = allPackets * uvd->iso_packet_len; | |
477 | xferBytes = uvd->stats.data_count; | |
478 | assert(allBytes != 0); | |
479 | if (xferBytes < (((unsigned long)-1)/100)) | |
480 | percent = (100 * xferBytes) / allBytes; | |
481 | else | |
482 | percent = xferBytes / (allBytes / 100); | |
483 | /* Scale xferBytes for easy reading */ | |
484 | if (xferBytes > 10*1024) { | |
485 | xferBytes /= 1024; | |
486 | multiplier = 'K'; | |
487 | if (xferBytes > 10*1024) { | |
488 | xferBytes /= 1024; | |
489 | multiplier = 'M'; | |
490 | if (xferBytes > 10*1024) { | |
491 | xferBytes /= 1024; | |
492 | multiplier = 'G'; | |
493 | if (xferBytes > 10*1024) { | |
494 | xferBytes /= 1024; | |
495 | multiplier = 'T'; | |
496 | } | |
497 | } | |
498 | } | |
499 | } | |
500 | info("Transfer Statistics: Transferred=%lu%cB Usage=%lu%%", | |
501 | xferBytes, multiplier, percent); | |
502 | } | |
503 | } | |
504 | } | |
505 | ||
506 | /* | |
507 | * usbvideo_TestPattern() | |
508 | * | |
509 | * Procedure forms a test pattern (yellow grid on blue background). | |
510 | * | |
511 | * Parameters: | |
512 | * fullframe: if TRUE then entire frame is filled, otherwise the procedure | |
513 | * continues from the current scanline. | |
514 | * pmode 0: fill the frame with solid blue color (like on VCR or TV) | |
515 | * 1: Draw a colored grid | |
516 | * | |
517 | * History: | |
518 | * 01-Feb-2000 Created. | |
519 | */ | |
520 | void usbvideo_TestPattern(struct uvd *uvd, int fullframe, int pmode) | |
521 | { | |
522 | struct usbvideo_frame *frame; | |
523 | int num_cell = 0; | |
524 | int scan_length = 0; | |
ff699e6b | 525 | static int num_pass; |
1da177e4 LT |
526 | |
527 | if (uvd == NULL) { | |
4126a8f5 | 528 | err("%s: uvd == NULL", __func__); |
1da177e4 LT |
529 | return; |
530 | } | |
531 | if ((uvd->curframe < 0) || (uvd->curframe >= USBVIDEO_NUMFRAMES)) { | |
4126a8f5 | 532 | err("%s: uvd->curframe=%d.", __func__, uvd->curframe); |
1da177e4 LT |
533 | return; |
534 | } | |
535 | ||
536 | /* Grab the current frame */ | |
537 | frame = &uvd->frame[uvd->curframe]; | |
538 | ||
539 | /* Optionally start at the beginning */ | |
540 | if (fullframe) { | |
541 | frame->curline = 0; | |
542 | frame->seqRead_Length = 0; | |
543 | } | |
544 | #if 0 | |
545 | { /* For debugging purposes only */ | |
546 | char tmp[20]; | |
547 | usbvideo_VideosizeToString(tmp, sizeof(tmp), frame->request); | |
548 | info("testpattern: frame=%s", tmp); | |
549 | } | |
550 | #endif | |
551 | /* Form every scan line */ | |
552 | for (; frame->curline < VIDEOSIZE_Y(frame->request); frame->curline++) { | |
553 | int i; | |
554 | unsigned char *f = frame->data + | |
555 | (VIDEOSIZE_X(frame->request) * V4L_BYTES_PER_PIXEL * frame->curline); | |
556 | for (i=0; i < VIDEOSIZE_X(frame->request); i++) { | |
557 | unsigned char cb=0x80; | |
558 | unsigned char cg = 0; | |
559 | unsigned char cr = 0; | |
560 | ||
561 | if (pmode == 1) { | |
562 | if (frame->curline % 32 == 0) | |
563 | cb = 0, cg = cr = 0xFF; | |
564 | else if (i % 32 == 0) { | |
565 | if (frame->curline % 32 == 1) | |
566 | num_cell++; | |
567 | cb = 0, cg = cr = 0xFF; | |
568 | } else { | |
569 | cb = ((num_cell*7) + num_pass) & 0xFF; | |
570 | cg = ((num_cell*5) + num_pass*2) & 0xFF; | |
571 | cr = ((num_cell*3) + num_pass*3) & 0xFF; | |
572 | } | |
573 | } else { | |
574 | /* Just the blue screen */ | |
575 | } | |
d56410e0 | 576 | |
1da177e4 LT |
577 | *f++ = cb; |
578 | *f++ = cg; | |
579 | *f++ = cr; | |
580 | scan_length += 3; | |
581 | } | |
582 | } | |
583 | ||
584 | frame->frameState = FrameState_Done; | |
585 | frame->seqRead_Length += scan_length; | |
586 | ++num_pass; | |
587 | ||
588 | /* We do this unconditionally, regardless of FLAGS_OVERLAY_STATS */ | |
589 | usbvideo_OverlayStats(uvd, frame); | |
590 | } | |
591 | ||
592 | EXPORT_SYMBOL(usbvideo_TestPattern); | |
593 | ||
594 | ||
595 | #ifdef DEBUG | |
596 | /* | |
597 | * usbvideo_HexDump() | |
598 | * | |
599 | * A debugging tool. Prints hex dumps. | |
600 | * | |
601 | * History: | |
602 | * 29-Jul-2000 Added printing of offsets. | |
603 | */ | |
604 | void usbvideo_HexDump(const unsigned char *data, int len) | |
605 | { | |
606 | const int bytes_per_line = 32; | |
607 | char tmp[128]; /* 32*3 + 5 */ | |
608 | int i, k; | |
609 | ||
610 | for (i=k=0; len > 0; i++, len--) { | |
611 | if (i > 0 && ((i % bytes_per_line) == 0)) { | |
612 | printk("%s\n", tmp); | |
613 | k=0; | |
614 | } | |
615 | if ((i % bytes_per_line) == 0) | |
616 | k += sprintf(&tmp[k], "%04x: ", i); | |
617 | k += sprintf(&tmp[k], "%02x ", data[i]); | |
618 | } | |
619 | if (k > 0) | |
620 | printk("%s\n", tmp); | |
621 | } | |
622 | ||
623 | EXPORT_SYMBOL(usbvideo_HexDump); | |
624 | ||
625 | #endif | |
626 | ||
627 | /* ******************************************************************** */ | |
628 | ||
629 | /* XXX: this piece of crap really wants some error handling.. */ | |
5332bdbe | 630 | static int usbvideo_ClientIncModCount(struct uvd *uvd) |
1da177e4 LT |
631 | { |
632 | if (uvd == NULL) { | |
4126a8f5 | 633 | err("%s: uvd == NULL", __func__); |
5332bdbe | 634 | return -EINVAL; |
1da177e4 LT |
635 | } |
636 | if (uvd->handle == NULL) { | |
4126a8f5 | 637 | err("%s: uvd->handle == NULL", __func__); |
5332bdbe | 638 | return -EINVAL; |
1da177e4 LT |
639 | } |
640 | if (!try_module_get(uvd->handle->md_module)) { | |
4126a8f5 | 641 | err("%s: try_module_get() == 0", __func__); |
5332bdbe | 642 | return -ENODEV; |
1da177e4 | 643 | } |
5332bdbe | 644 | return 0; |
1da177e4 LT |
645 | } |
646 | ||
647 | static void usbvideo_ClientDecModCount(struct uvd *uvd) | |
648 | { | |
649 | if (uvd == NULL) { | |
4126a8f5 | 650 | err("%s: uvd == NULL", __func__); |
1da177e4 LT |
651 | return; |
652 | } | |
653 | if (uvd->handle == NULL) { | |
4126a8f5 | 654 | err("%s: uvd->handle == NULL", __func__); |
1da177e4 LT |
655 | return; |
656 | } | |
657 | if (uvd->handle->md_module == NULL) { | |
4126a8f5 | 658 | err("%s: uvd->handle->md_module == NULL", __func__); |
1da177e4 LT |
659 | return; |
660 | } | |
661 | module_put(uvd->handle->md_module); | |
662 | } | |
663 | ||
664 | int usbvideo_register( | |
665 | struct usbvideo **pCams, | |
666 | const int num_cams, | |
667 | const int num_extra, | |
668 | const char *driverName, | |
669 | const struct usbvideo_cb *cbTbl, | |
670 | struct module *md, | |
671 | const struct usb_device_id *id_table) | |
672 | { | |
673 | struct usbvideo *cams; | |
674 | int i, base_size, result; | |
675 | ||
676 | /* Check parameters for sanity */ | |
677 | if ((num_cams <= 0) || (pCams == NULL) || (cbTbl == NULL)) { | |
4126a8f5 | 678 | err("%s: Illegal call", __func__); |
1da177e4 LT |
679 | return -EINVAL; |
680 | } | |
681 | ||
682 | /* Check registration callback - must be set! */ | |
683 | if (cbTbl->probe == NULL) { | |
4126a8f5 | 684 | err("%s: probe() is required!", __func__); |
1da177e4 LT |
685 | return -EINVAL; |
686 | } | |
687 | ||
688 | base_size = num_cams * sizeof(struct uvd) + sizeof(struct usbvideo); | |
5cbded58 | 689 | cams = kzalloc(base_size, GFP_KERNEL); |
1da177e4 LT |
690 | if (cams == NULL) { |
691 | err("Failed to allocate %d. bytes for usbvideo struct", base_size); | |
692 | return -ENOMEM; | |
693 | } | |
694 | dbg("%s: Allocated $%p (%d. bytes) for %d. cameras", | |
4126a8f5 | 695 | __func__, cams, base_size, num_cams); |
1da177e4 LT |
696 | |
697 | /* Copy callbacks, apply defaults for those that are not set */ | |
698 | memmove(&cams->cb, cbTbl, sizeof(cams->cb)); | |
699 | if (cams->cb.getFrame == NULL) | |
700 | cams->cb.getFrame = usbvideo_GetFrame; | |
701 | if (cams->cb.disconnect == NULL) | |
702 | cams->cb.disconnect = usbvideo_Disconnect; | |
703 | if (cams->cb.startDataPump == NULL) | |
704 | cams->cb.startDataPump = usbvideo_StartDataPump; | |
705 | if (cams->cb.stopDataPump == NULL) | |
706 | cams->cb.stopDataPump = usbvideo_StopDataPump; | |
707 | ||
708 | cams->num_cameras = num_cams; | |
709 | cams->cam = (struct uvd *) &cams[1]; | |
710 | cams->md_module = md; | |
4186ecf8 | 711 | mutex_init(&cams->lock); /* to 1 == available */ |
1da177e4 LT |
712 | |
713 | for (i = 0; i < num_cams; i++) { | |
714 | struct uvd *up = &cams->cam[i]; | |
715 | ||
716 | up->handle = cams; | |
717 | ||
718 | /* Allocate user_data separately because of kmalloc's limits */ | |
719 | if (num_extra > 0) { | |
720 | up->user_size = num_cams * num_extra; | |
0e8eb0f0 | 721 | up->user_data = kmalloc(up->user_size, GFP_KERNEL); |
1da177e4 LT |
722 | if (up->user_data == NULL) { |
723 | err("%s: Failed to allocate user_data (%d. bytes)", | |
4126a8f5 | 724 | __func__, up->user_size); |
1da177e4 LT |
725 | while (i) { |
726 | up = &cams->cam[--i]; | |
727 | kfree(up->user_data); | |
728 | } | |
729 | kfree(cams); | |
730 | return -ENOMEM; | |
731 | } | |
732 | dbg("%s: Allocated cams[%d].user_data=$%p (%d. bytes)", | |
4126a8f5 | 733 | __func__, i, up->user_data, up->user_size); |
1da177e4 LT |
734 | } |
735 | } | |
736 | ||
737 | /* | |
738 | * Register ourselves with USB stack. | |
739 | */ | |
740 | strcpy(cams->drvName, (driverName != NULL) ? driverName : "Unknown"); | |
741 | cams->usbdrv.name = cams->drvName; | |
742 | cams->usbdrv.probe = cams->cb.probe; | |
743 | cams->usbdrv.disconnect = cams->cb.disconnect; | |
744 | cams->usbdrv.id_table = id_table; | |
745 | ||
746 | /* | |
747 | * Update global handle to usbvideo. This is very important | |
748 | * because probe() can be called before usb_register() returns. | |
749 | * If the handle is not yet updated then the probe() will fail. | |
750 | */ | |
751 | *pCams = cams; | |
752 | result = usb_register(&cams->usbdrv); | |
753 | if (result) { | |
754 | for (i = 0; i < num_cams; i++) { | |
755 | struct uvd *up = &cams->cam[i]; | |
756 | kfree(up->user_data); | |
757 | } | |
758 | kfree(cams); | |
759 | } | |
760 | ||
761 | return result; | |
762 | } | |
763 | ||
764 | EXPORT_SYMBOL(usbvideo_register); | |
765 | ||
766 | /* | |
767 | * usbvideo_Deregister() | |
768 | * | |
769 | * Procedure frees all usbvideo and user data structures. Be warned that | |
770 | * if you had some dynamically allocated components in ->user field then | |
771 | * you should free them before calling here. | |
772 | */ | |
773 | void usbvideo_Deregister(struct usbvideo **pCams) | |
774 | { | |
775 | struct usbvideo *cams; | |
776 | int i; | |
777 | ||
778 | if (pCams == NULL) { | |
4126a8f5 | 779 | err("%s: pCams == NULL", __func__); |
1da177e4 LT |
780 | return; |
781 | } | |
782 | cams = *pCams; | |
783 | if (cams == NULL) { | |
4126a8f5 | 784 | err("%s: cams == NULL", __func__); |
1da177e4 LT |
785 | return; |
786 | } | |
787 | ||
4126a8f5 | 788 | dbg("%s: Deregistering %s driver.", __func__, cams->drvName); |
1da177e4 LT |
789 | usb_deregister(&cams->usbdrv); |
790 | ||
4126a8f5 | 791 | dbg("%s: Deallocating cams=$%p (%d. cameras)", __func__, cams, cams->num_cameras); |
1da177e4 LT |
792 | for (i=0; i < cams->num_cameras; i++) { |
793 | struct uvd *up = &cams->cam[i]; | |
794 | int warning = 0; | |
795 | ||
796 | if (up->user_data != NULL) { | |
797 | if (up->user_size <= 0) | |
798 | ++warning; | |
799 | } else { | |
800 | if (up->user_size > 0) | |
801 | ++warning; | |
802 | } | |
803 | if (warning) { | |
804 | err("%s: Warning: user_data=$%p user_size=%d.", | |
4126a8f5 | 805 | __func__, up->user_data, up->user_size); |
1da177e4 LT |
806 | } else { |
807 | dbg("%s: Freeing %d. $%p->user_data=$%p", | |
4126a8f5 | 808 | __func__, i, up, up->user_data); |
1da177e4 LT |
809 | kfree(up->user_data); |
810 | } | |
811 | } | |
812 | /* Whole array was allocated in one chunk */ | |
813 | dbg("%s: Freed %d uvd structures", | |
4126a8f5 | 814 | __func__, cams->num_cameras); |
1da177e4 LT |
815 | kfree(cams); |
816 | *pCams = NULL; | |
817 | } | |
818 | ||
819 | EXPORT_SYMBOL(usbvideo_Deregister); | |
820 | ||
821 | /* | |
822 | * usbvideo_Disconnect() | |
823 | * | |
824 | * This procedure stops all driver activity. Deallocation of | |
825 | * the interface-private structure (pointed by 'ptr') is done now | |
826 | * (if we don't have any open files) or later, when those files | |
827 | * are closed. After that driver should be removable. | |
828 | * | |
829 | * This code handles surprise removal. The uvd->user is a counter which | |
830 | * increments on open() and decrements on close(). If we see here that | |
831 | * this counter is not 0 then we have a client who still has us opened. | |
832 | * We set uvd->remove_pending flag as early as possible, and after that | |
833 | * all access to the camera will gracefully fail. These failures should | |
834 | * prompt client to (eventually) close the video device, and then - in | |
835 | * usbvideo_v4l_close() - we decrement uvd->uvd_used and usage counter. | |
836 | * | |
837 | * History: | |
838 | * 22-Jan-2000 Added polling of MOD_IN_USE to delay removal until all users gone. | |
839 | * 27-Jan-2000 Reworked to allow pending disconnects; see xxx_close() | |
840 | * 24-May-2000 Corrected to prevent race condition (MOD_xxx_USE_COUNT). | |
841 | * 19-Oct-2000 Moved to usbvideo module. | |
842 | */ | |
843 | static void usbvideo_Disconnect(struct usb_interface *intf) | |
844 | { | |
845 | struct uvd *uvd = usb_get_intfdata (intf); | |
846 | int i; | |
847 | ||
848 | if (uvd == NULL) { | |
4126a8f5 | 849 | err("%s($%p): Illegal call.", __func__, intf); |
1da177e4 LT |
850 | return; |
851 | } | |
852 | ||
853 | usb_set_intfdata (intf, NULL); | |
854 | ||
855 | usbvideo_ClientIncModCount(uvd); | |
856 | if (uvd->debug > 0) | |
4126a8f5 | 857 | info("%s(%p.)", __func__, intf); |
1da177e4 | 858 | |
4186ecf8 | 859 | mutex_lock(&uvd->lock); |
1da177e4 LT |
860 | uvd->remove_pending = 1; /* Now all ISO data will be ignored */ |
861 | ||
862 | /* At this time we ask to cancel outstanding URBs */ | |
863 | GET_CALLBACK(uvd, stopDataPump)(uvd); | |
864 | ||
865 | for (i=0; i < USBVIDEO_NUMSBUF; i++) | |
866 | usb_free_urb(uvd->sbuf[i].urb); | |
867 | ||
868 | usb_put_dev(uvd->dev); | |
869 | uvd->dev = NULL; /* USB device is no more */ | |
870 | ||
871 | video_unregister_device(&uvd->vdev); | |
872 | if (uvd->debug > 0) | |
4126a8f5 | 873 | info("%s: Video unregistered.", __func__); |
1da177e4 LT |
874 | |
875 | if (uvd->user) | |
4126a8f5 | 876 | info("%s: In use, disconnect pending.", __func__); |
1da177e4 LT |
877 | else |
878 | usbvideo_CameraRelease(uvd); | |
4186ecf8 | 879 | mutex_unlock(&uvd->lock); |
1da177e4 LT |
880 | info("USB camera disconnected."); |
881 | ||
882 | usbvideo_ClientDecModCount(uvd); | |
883 | } | |
884 | ||
885 | /* | |
886 | * usbvideo_CameraRelease() | |
887 | * | |
888 | * This code does final release of uvd. This happens | |
889 | * after the device is disconnected -and- all clients | |
890 | * closed their files. | |
891 | * | |
892 | * History: | |
893 | * 27-Jan-2000 Created. | |
894 | */ | |
895 | static void usbvideo_CameraRelease(struct uvd *uvd) | |
896 | { | |
897 | if (uvd == NULL) { | |
4126a8f5 | 898 | err("%s: Illegal call", __func__); |
1da177e4 LT |
899 | return; |
900 | } | |
901 | ||
902 | RingQueue_Free(&uvd->dp); | |
903 | if (VALID_CALLBACK(uvd, userFree)) | |
904 | GET_CALLBACK(uvd, userFree)(uvd); | |
905 | uvd->uvd_used = 0; /* This is atomic, no need to take mutex */ | |
906 | } | |
907 | ||
908 | /* | |
909 | * usbvideo_find_struct() | |
910 | * | |
911 | * This code searches the array of preallocated (static) structures | |
912 | * and returns index of the first one that isn't in use. Returns -1 | |
913 | * if there are no free structures. | |
914 | * | |
915 | * History: | |
916 | * 27-Jan-2000 Created. | |
917 | */ | |
918 | static int usbvideo_find_struct(struct usbvideo *cams) | |
919 | { | |
920 | int u, rv = -1; | |
921 | ||
922 | if (cams == NULL) { | |
923 | err("No usbvideo handle?"); | |
924 | return -1; | |
925 | } | |
4186ecf8 | 926 | mutex_lock(&cams->lock); |
1da177e4 LT |
927 | for (u = 0; u < cams->num_cameras; u++) { |
928 | struct uvd *uvd = &cams->cam[u]; | |
929 | if (!uvd->uvd_used) /* This one is free */ | |
930 | { | |
931 | uvd->uvd_used = 1; /* In use now */ | |
4186ecf8 | 932 | mutex_init(&uvd->lock); /* to 1 == available */ |
1da177e4 LT |
933 | uvd->dev = NULL; |
934 | rv = u; | |
935 | break; | |
936 | } | |
937 | } | |
4186ecf8 | 938 | mutex_unlock(&cams->lock); |
1da177e4 LT |
939 | return rv; |
940 | } | |
941 | ||
fa027c2a | 942 | static const struct file_operations usbvideo_fops = { |
1da177e4 LT |
943 | .owner = THIS_MODULE, |
944 | .open = usbvideo_v4l_open, | |
945 | .release =usbvideo_v4l_close, | |
946 | .read = usbvideo_v4l_read, | |
947 | .mmap = usbvideo_v4l_mmap, | |
948 | .ioctl = usbvideo_v4l_ioctl, | |
078ff795 | 949 | #ifdef CONFIG_COMPAT |
0d0fbf81 | 950 | .compat_ioctl = v4l_compat_ioctl32, |
078ff795 | 951 | #endif |
1da177e4 LT |
952 | .llseek = no_llseek, |
953 | }; | |
4c4c9432 | 954 | static const struct video_device usbvideo_template = { |
1da177e4 LT |
955 | .fops = &usbvideo_fops, |
956 | }; | |
957 | ||
958 | struct uvd *usbvideo_AllocateDevice(struct usbvideo *cams) | |
959 | { | |
960 | int i, devnum; | |
961 | struct uvd *uvd = NULL; | |
962 | ||
963 | if (cams == NULL) { | |
964 | err("No usbvideo handle?"); | |
965 | return NULL; | |
966 | } | |
967 | ||
968 | devnum = usbvideo_find_struct(cams); | |
969 | if (devnum == -1) { | |
970 | err("IBM USB camera driver: Too many devices!"); | |
971 | return NULL; | |
972 | } | |
973 | uvd = &cams->cam[devnum]; | |
974 | dbg("Device entry #%d. at $%p", devnum, uvd); | |
975 | ||
976 | /* Not relying upon caller we increase module counter ourselves */ | |
977 | usbvideo_ClientIncModCount(uvd); | |
978 | ||
4186ecf8 | 979 | mutex_lock(&uvd->lock); |
1da177e4 LT |
980 | for (i=0; i < USBVIDEO_NUMSBUF; i++) { |
981 | uvd->sbuf[i].urb = usb_alloc_urb(FRAMES_PER_DESC, GFP_KERNEL); | |
982 | if (uvd->sbuf[i].urb == NULL) { | |
983 | err("usb_alloc_urb(%d.) failed.", FRAMES_PER_DESC); | |
984 | uvd->uvd_used = 0; | |
985 | uvd = NULL; | |
986 | goto allocate_done; | |
987 | } | |
988 | } | |
989 | uvd->user=0; | |
990 | uvd->remove_pending = 0; | |
991 | uvd->last_error = 0; | |
992 | RingQueue_Initialize(&uvd->dp); | |
993 | ||
994 | /* Initialize video device structure */ | |
995 | uvd->vdev = usbvideo_template; | |
996 | sprintf(uvd->vdev.name, "%.20s USB Camera", cams->drvName); | |
997 | /* | |
998 | * The client is free to overwrite those because we | |
999 | * return control to the client's probe function right now. | |
1000 | */ | |
1001 | allocate_done: | |
4186ecf8 | 1002 | mutex_unlock(&uvd->lock); |
1da177e4 LT |
1003 | usbvideo_ClientDecModCount(uvd); |
1004 | return uvd; | |
1005 | } | |
1006 | ||
1007 | EXPORT_SYMBOL(usbvideo_AllocateDevice); | |
1008 | ||
1009 | int usbvideo_RegisterVideoDevice(struct uvd *uvd) | |
1010 | { | |
1011 | char tmp1[20], tmp2[20]; /* Buffers for printing */ | |
1012 | ||
1013 | if (uvd == NULL) { | |
4126a8f5 | 1014 | err("%s: Illegal call.", __func__); |
1da177e4 LT |
1015 | return -EINVAL; |
1016 | } | |
1017 | if (uvd->video_endp == 0) { | |
4126a8f5 | 1018 | info("%s: No video endpoint specified; data pump disabled.", __func__); |
1da177e4 LT |
1019 | } |
1020 | if (uvd->paletteBits == 0) { | |
4126a8f5 | 1021 | err("%s: No palettes specified!", __func__); |
1da177e4 LT |
1022 | return -EINVAL; |
1023 | } | |
1024 | if (uvd->defaultPalette == 0) { | |
4126a8f5 | 1025 | info("%s: No default palette!", __func__); |
1da177e4 LT |
1026 | } |
1027 | ||
1028 | uvd->max_frame_size = VIDEOSIZE_X(uvd->canvas) * | |
1029 | VIDEOSIZE_Y(uvd->canvas) * V4L_BYTES_PER_PIXEL; | |
1030 | usbvideo_VideosizeToString(tmp1, sizeof(tmp1), uvd->videosize); | |
1031 | usbvideo_VideosizeToString(tmp2, sizeof(tmp2), uvd->canvas); | |
1032 | ||
1033 | if (uvd->debug > 0) { | |
1034 | info("%s: iface=%d. endpoint=$%02x paletteBits=$%08lx", | |
4126a8f5 | 1035 | __func__, uvd->iface, uvd->video_endp, uvd->paletteBits); |
1da177e4 | 1036 | } |
974a911d | 1037 | if (uvd->dev == NULL) { |
1c659689 | 1038 | err("%s: uvd->dev == NULL", __func__); |
974a911d PT |
1039 | return -EINVAL; |
1040 | } | |
5e85e732 | 1041 | uvd->vdev.parent = &uvd->dev->dev; |
aa5e90af | 1042 | uvd->vdev.release = video_device_release_empty; |
e758c6f8 | 1043 | if (video_register_device(&uvd->vdev, VFL_TYPE_GRABBER, video_nr) < 0) { |
4126a8f5 | 1044 | err("%s: video_register_device failed", __func__); |
1da177e4 LT |
1045 | return -EPIPE; |
1046 | } | |
1047 | if (uvd->debug > 1) { | |
4126a8f5 | 1048 | info("%s: video_register_device() successful", __func__); |
1da177e4 | 1049 | } |
1da177e4 LT |
1050 | |
1051 | info("%s on /dev/video%d: canvas=%s videosize=%s", | |
1052 | (uvd->handle != NULL) ? uvd->handle->drvName : "???", | |
1053 | uvd->vdev.minor, tmp2, tmp1); | |
1054 | ||
1055 | usb_get_dev(uvd->dev); | |
1056 | return 0; | |
1057 | } | |
1058 | ||
1059 | EXPORT_SYMBOL(usbvideo_RegisterVideoDevice); | |
1060 | ||
1061 | /* ******************************************************************** */ | |
1062 | ||
1063 | static int usbvideo_v4l_mmap(struct file *file, struct vm_area_struct *vma) | |
1064 | { | |
1065 | struct uvd *uvd = file->private_data; | |
1066 | unsigned long start = vma->vm_start; | |
1067 | unsigned long size = vma->vm_end-vma->vm_start; | |
1068 | unsigned long page, pos; | |
1069 | ||
1070 | if (!CAMERA_IS_OPERATIONAL(uvd)) | |
1071 | return -EFAULT; | |
1072 | ||
1073 | if (size > (((USBVIDEO_NUMFRAMES * uvd->max_frame_size) + PAGE_SIZE - 1) & ~(PAGE_SIZE - 1))) | |
1074 | return -EINVAL; | |
1075 | ||
1076 | pos = (unsigned long) uvd->fbuf; | |
1077 | while (size > 0) { | |
1078 | page = vmalloc_to_pfn((void *)pos); | |
1079 | if (remap_pfn_range(vma, start, page, PAGE_SIZE, PAGE_SHARED)) | |
1080 | return -EAGAIN; | |
1081 | ||
1082 | start += PAGE_SIZE; | |
1083 | pos += PAGE_SIZE; | |
1084 | if (size > PAGE_SIZE) | |
1085 | size -= PAGE_SIZE; | |
1086 | else | |
1087 | size = 0; | |
1088 | } | |
1089 | ||
1090 | return 0; | |
1091 | } | |
1092 | ||
1093 | /* | |
1094 | * usbvideo_v4l_open() | |
1095 | * | |
1096 | * This is part of Video 4 Linux API. The driver can be opened by one | |
1097 | * client only (checks internal counter 'uvdser'). The procedure | |
1098 | * then allocates buffers needed for video processing. | |
1099 | * | |
1100 | * History: | |
1101 | * 22-Jan-2000 Rewrote, moved scratch buffer allocation here. Now the | |
1102 | * camera is also initialized here (once per connect), at | |
1103 | * expense of V4L client (it waits on open() call). | |
1104 | * 27-Jan-2000 Used USBVIDEO_NUMSBUF as number of URB buffers. | |
1105 | * 24-May-2000 Corrected to prevent race condition (MOD_xxx_USE_COUNT). | |
1106 | */ | |
1107 | static int usbvideo_v4l_open(struct inode *inode, struct file *file) | |
1108 | { | |
1109 | struct video_device *dev = video_devdata(file); | |
1110 | struct uvd *uvd = (struct uvd *) dev; | |
1111 | const int sb_size = FRAMES_PER_DESC * uvd->iso_packet_len; | |
1112 | int i, errCode = 0; | |
1113 | ||
1114 | if (uvd->debug > 1) | |
4126a8f5 | 1115 | info("%s($%p)", __func__, dev); |
1da177e4 | 1116 | |
5332bdbe ON |
1117 | if (0 < usbvideo_ClientIncModCount(uvd)) |
1118 | return -ENODEV; | |
4186ecf8 | 1119 | mutex_lock(&uvd->lock); |
1da177e4 LT |
1120 | |
1121 | if (uvd->user) { | |
4126a8f5 | 1122 | err("%s: Someone tried to open an already opened device!", __func__); |
1da177e4 LT |
1123 | errCode = -EBUSY; |
1124 | } else { | |
1125 | /* Clear statistics */ | |
1126 | memset(&uvd->stats, 0, sizeof(uvd->stats)); | |
1127 | ||
1128 | /* Clean pointers so we know if we allocated something */ | |
1129 | for (i=0; i < USBVIDEO_NUMSBUF; i++) | |
1130 | uvd->sbuf[i].data = NULL; | |
1131 | ||
1132 | /* Allocate memory for the frame buffers */ | |
1133 | uvd->fbuf_size = USBVIDEO_NUMFRAMES * uvd->max_frame_size; | |
1134 | uvd->fbuf = usbvideo_rvmalloc(uvd->fbuf_size); | |
1135 | RingQueue_Allocate(&uvd->dp, RING_QUEUE_SIZE); | |
1136 | if ((uvd->fbuf == NULL) || | |
1137 | (!RingQueue_IsAllocated(&uvd->dp))) { | |
4126a8f5 | 1138 | err("%s: Failed to allocate fbuf or dp", __func__); |
1da177e4 LT |
1139 | errCode = -ENOMEM; |
1140 | } else { | |
1141 | /* Allocate all buffers */ | |
1142 | for (i=0; i < USBVIDEO_NUMFRAMES; i++) { | |
1143 | uvd->frame[i].frameState = FrameState_Unused; | |
1144 | uvd->frame[i].data = uvd->fbuf + i*(uvd->max_frame_size); | |
1145 | /* | |
1146 | * Set default sizes in case IOCTL (VIDIOCMCAPTURE) | |
1147 | * is not used (using read() instead). | |
1148 | */ | |
1149 | uvd->frame[i].canvas = uvd->canvas; | |
1150 | uvd->frame[i].seqRead_Index = 0; | |
1151 | } | |
1152 | for (i=0; i < USBVIDEO_NUMSBUF; i++) { | |
1153 | uvd->sbuf[i].data = kmalloc(sb_size, GFP_KERNEL); | |
1154 | if (uvd->sbuf[i].data == NULL) { | |
1155 | errCode = -ENOMEM; | |
1156 | break; | |
1157 | } | |
1158 | } | |
1159 | } | |
1160 | if (errCode != 0) { | |
1161 | /* Have to free all that memory */ | |
1162 | if (uvd->fbuf != NULL) { | |
1163 | usbvideo_rvfree(uvd->fbuf, uvd->fbuf_size); | |
1164 | uvd->fbuf = NULL; | |
1165 | } | |
1166 | RingQueue_Free(&uvd->dp); | |
1167 | for (i=0; i < USBVIDEO_NUMSBUF; i++) { | |
1bc3c9e1 JJ |
1168 | kfree(uvd->sbuf[i].data); |
1169 | uvd->sbuf[i].data = NULL; | |
1da177e4 LT |
1170 | } |
1171 | } | |
1172 | } | |
1173 | ||
1174 | /* If so far no errors then we shall start the camera */ | |
1175 | if (errCode == 0) { | |
1176 | /* Start data pump if we have valid endpoint */ | |
1177 | if (uvd->video_endp != 0) | |
1178 | errCode = GET_CALLBACK(uvd, startDataPump)(uvd); | |
1179 | if (errCode == 0) { | |
1180 | if (VALID_CALLBACK(uvd, setupOnOpen)) { | |
1181 | if (uvd->debug > 1) | |
4126a8f5 | 1182 | info("%s: setupOnOpen callback", __func__); |
1da177e4 LT |
1183 | errCode = GET_CALLBACK(uvd, setupOnOpen)(uvd); |
1184 | if (errCode < 0) { | |
1185 | err("%s: setupOnOpen callback failed (%d.).", | |
4126a8f5 | 1186 | __func__, errCode); |
1da177e4 | 1187 | } else if (uvd->debug > 1) { |
4126a8f5 | 1188 | info("%s: setupOnOpen callback successful", __func__); |
1da177e4 LT |
1189 | } |
1190 | } | |
1191 | if (errCode == 0) { | |
1192 | uvd->settingsAdjusted = 0; | |
1193 | if (uvd->debug > 1) | |
4126a8f5 | 1194 | info("%s: Open succeeded.", __func__); |
1da177e4 LT |
1195 | uvd->user++; |
1196 | file->private_data = uvd; | |
1197 | } | |
1198 | } | |
1199 | } | |
4186ecf8 | 1200 | mutex_unlock(&uvd->lock); |
1da177e4 LT |
1201 | if (errCode != 0) |
1202 | usbvideo_ClientDecModCount(uvd); | |
1203 | if (uvd->debug > 0) | |
4126a8f5 | 1204 | info("%s: Returning %d.", __func__, errCode); |
1da177e4 LT |
1205 | return errCode; |
1206 | } | |
1207 | ||
1208 | /* | |
1209 | * usbvideo_v4l_close() | |
1210 | * | |
1211 | * This is part of Video 4 Linux API. The procedure | |
1212 | * stops streaming and deallocates all buffers that were earlier | |
1213 | * allocated in usbvideo_v4l_open(). | |
1214 | * | |
1215 | * History: | |
1216 | * 22-Jan-2000 Moved scratch buffer deallocation here. | |
1217 | * 27-Jan-2000 Used USBVIDEO_NUMSBUF as number of URB buffers. | |
1218 | * 24-May-2000 Moved MOD_DEC_USE_COUNT outside of code that can sleep. | |
1219 | */ | |
1220 | static int usbvideo_v4l_close(struct inode *inode, struct file *file) | |
1221 | { | |
1222 | struct video_device *dev = file->private_data; | |
1223 | struct uvd *uvd = (struct uvd *) dev; | |
1224 | int i; | |
1225 | ||
1226 | if (uvd->debug > 1) | |
4126a8f5 | 1227 | info("%s($%p)", __func__, dev); |
1da177e4 | 1228 | |
4186ecf8 | 1229 | mutex_lock(&uvd->lock); |
1da177e4 LT |
1230 | GET_CALLBACK(uvd, stopDataPump)(uvd); |
1231 | usbvideo_rvfree(uvd->fbuf, uvd->fbuf_size); | |
1232 | uvd->fbuf = NULL; | |
1233 | RingQueue_Free(&uvd->dp); | |
1234 | ||
1235 | for (i=0; i < USBVIDEO_NUMSBUF; i++) { | |
1236 | kfree(uvd->sbuf[i].data); | |
1237 | uvd->sbuf[i].data = NULL; | |
1238 | } | |
1239 | ||
1240 | #if USBVIDEO_REPORT_STATS | |
1241 | usbvideo_ReportStatistics(uvd); | |
d56410e0 | 1242 | #endif |
1da177e4 LT |
1243 | |
1244 | uvd->user--; | |
1245 | if (uvd->remove_pending) { | |
1246 | if (uvd->debug > 0) | |
1247 | info("usbvideo_v4l_close: Final disconnect."); | |
1248 | usbvideo_CameraRelease(uvd); | |
1249 | } | |
4186ecf8 | 1250 | mutex_unlock(&uvd->lock); |
1da177e4 LT |
1251 | usbvideo_ClientDecModCount(uvd); |
1252 | ||
1253 | if (uvd->debug > 1) | |
4126a8f5 | 1254 | info("%s: Completed.", __func__); |
1da177e4 LT |
1255 | file->private_data = NULL; |
1256 | return 0; | |
1257 | } | |
1258 | ||
1259 | /* | |
1260 | * usbvideo_v4l_ioctl() | |
1261 | * | |
1262 | * This is part of Video 4 Linux API. The procedure handles ioctl() calls. | |
1263 | * | |
1264 | * History: | |
1265 | * 22-Jan-2000 Corrected VIDIOCSPICT to reject unsupported settings. | |
1266 | */ | |
1267 | static int usbvideo_v4l_do_ioctl(struct inode *inode, struct file *file, | |
1268 | unsigned int cmd, void *arg) | |
1269 | { | |
1270 | struct uvd *uvd = file->private_data; | |
1271 | ||
1272 | if (!CAMERA_IS_OPERATIONAL(uvd)) | |
1273 | return -EIO; | |
1274 | ||
1275 | switch (cmd) { | |
1276 | case VIDIOCGCAP: | |
1277 | { | |
1278 | struct video_capability *b = arg; | |
1279 | *b = uvd->vcap; | |
1280 | return 0; | |
1281 | } | |
1282 | case VIDIOCGCHAN: | |
1283 | { | |
1284 | struct video_channel *v = arg; | |
1285 | *v = uvd->vchan; | |
1286 | return 0; | |
1287 | } | |
1288 | case VIDIOCSCHAN: | |
d56410e0 | 1289 | { |
1da177e4 LT |
1290 | struct video_channel *v = arg; |
1291 | if (v->channel != 0) | |
1292 | return -EINVAL; | |
1293 | return 0; | |
1294 | } | |
1295 | case VIDIOCGPICT: | |
1296 | { | |
1297 | struct video_picture *pic = arg; | |
1298 | *pic = uvd->vpic; | |
1299 | return 0; | |
1300 | } | |
1301 | case VIDIOCSPICT: | |
1302 | { | |
1303 | struct video_picture *pic = arg; | |
1304 | /* | |
1305 | * Use temporary 'video_picture' structure to preserve our | |
1306 | * own settings (such as color depth, palette) that we | |
1307 | * aren't allowing everyone (V4L client) to change. | |
1308 | */ | |
1309 | uvd->vpic.brightness = pic->brightness; | |
1310 | uvd->vpic.hue = pic->hue; | |
1311 | uvd->vpic.colour = pic->colour; | |
1312 | uvd->vpic.contrast = pic->contrast; | |
1313 | uvd->settingsAdjusted = 0; /* Will force new settings */ | |
1314 | return 0; | |
1315 | } | |
1316 | case VIDIOCSWIN: | |
1317 | { | |
1318 | struct video_window *vw = arg; | |
1319 | ||
1320 | if(VALID_CALLBACK(uvd, setVideoMode)) { | |
1321 | return GET_CALLBACK(uvd, setVideoMode)(uvd, vw); | |
1322 | } | |
1323 | ||
1324 | if (vw->flags) | |
1325 | return -EINVAL; | |
1326 | if (vw->clipcount) | |
1327 | return -EINVAL; | |
1328 | if (vw->width != VIDEOSIZE_X(uvd->canvas)) | |
1329 | return -EINVAL; | |
1330 | if (vw->height != VIDEOSIZE_Y(uvd->canvas)) | |
1331 | return -EINVAL; | |
1332 | ||
1333 | return 0; | |
1334 | } | |
1335 | case VIDIOCGWIN: | |
1336 | { | |
1337 | struct video_window *vw = arg; | |
1338 | ||
1339 | vw->x = 0; | |
1340 | vw->y = 0; | |
1341 | vw->width = VIDEOSIZE_X(uvd->videosize); | |
1342 | vw->height = VIDEOSIZE_Y(uvd->videosize); | |
1343 | vw->chromakey = 0; | |
1344 | if (VALID_CALLBACK(uvd, getFPS)) | |
1345 | vw->flags = GET_CALLBACK(uvd, getFPS)(uvd); | |
d56410e0 | 1346 | else |
1da177e4 LT |
1347 | vw->flags = 10; /* FIXME: do better! */ |
1348 | return 0; | |
1349 | } | |
1350 | case VIDIOCGMBUF: | |
1351 | { | |
1352 | struct video_mbuf *vm = arg; | |
1353 | int i; | |
1354 | ||
1355 | memset(vm, 0, sizeof(*vm)); | |
1356 | vm->size = uvd->max_frame_size * USBVIDEO_NUMFRAMES; | |
1357 | vm->frames = USBVIDEO_NUMFRAMES; | |
d56410e0 | 1358 | for(i = 0; i < USBVIDEO_NUMFRAMES; i++) |
1da177e4 LT |
1359 | vm->offsets[i] = i * uvd->max_frame_size; |
1360 | ||
1361 | return 0; | |
1362 | } | |
1363 | case VIDIOCMCAPTURE: | |
1364 | { | |
1365 | struct video_mmap *vm = arg; | |
1366 | ||
1367 | if (uvd->debug >= 1) { | |
1368 | info("VIDIOCMCAPTURE: frame=%d. size=%dx%d, format=%d.", | |
1369 | vm->frame, vm->width, vm->height, vm->format); | |
1370 | } | |
1371 | /* | |
1372 | * Check if the requested size is supported. If the requestor | |
1373 | * requests too big a frame then we may be tricked into accessing | |
1374 | * outside of own preallocated frame buffer (in uvd->frame). | |
1375 | * This will cause oops or a security hole. Theoretically, we | |
1376 | * could only clamp the size down to acceptable bounds, but then | |
1377 | * we'd need to figure out how to insert our smaller buffer into | |
1378 | * larger caller's buffer... this is not an easy question. So we | |
1379 | * here just flatly reject too large requests, assuming that the | |
1380 | * caller will resubmit with smaller size. Callers should know | |
1381 | * what size we support (returned by VIDIOCGCAP). However vidcat, | |
1382 | * for one, does not care and allows to ask for any size. | |
1383 | */ | |
1384 | if ((vm->width > VIDEOSIZE_X(uvd->canvas)) || | |
1385 | (vm->height > VIDEOSIZE_Y(uvd->canvas))) { | |
1386 | if (uvd->debug > 0) { | |
1387 | info("VIDIOCMCAPTURE: Size=%dx%d too large; " | |
1388 | "allowed only up to %ldx%ld", vm->width, vm->height, | |
1389 | VIDEOSIZE_X(uvd->canvas), VIDEOSIZE_Y(uvd->canvas)); | |
1390 | } | |
1391 | return -EINVAL; | |
1392 | } | |
1393 | /* Check if the palette is supported */ | |
1394 | if (((1L << vm->format) & uvd->paletteBits) == 0) { | |
1395 | if (uvd->debug > 0) { | |
1396 | info("VIDIOCMCAPTURE: format=%d. not supported" | |
1397 | " (paletteBits=$%08lx)", | |
1398 | vm->format, uvd->paletteBits); | |
1399 | } | |
1400 | return -EINVAL; | |
1401 | } | |
1402 | if ((vm->frame < 0) || (vm->frame >= USBVIDEO_NUMFRAMES)) { | |
1403 | err("VIDIOCMCAPTURE: vm.frame=%d. !E [0-%d]", vm->frame, USBVIDEO_NUMFRAMES-1); | |
1404 | return -EINVAL; | |
1405 | } | |
1406 | if (uvd->frame[vm->frame].frameState == FrameState_Grabbing) { | |
1407 | /* Not an error - can happen */ | |
1408 | } | |
1409 | uvd->frame[vm->frame].request = VIDEOSIZE(vm->width, vm->height); | |
1410 | uvd->frame[vm->frame].palette = vm->format; | |
1411 | ||
1412 | /* Mark it as ready */ | |
1413 | uvd->frame[vm->frame].frameState = FrameState_Ready; | |
1414 | ||
1415 | return usbvideo_NewFrame(uvd, vm->frame); | |
1416 | } | |
1417 | case VIDIOCSYNC: | |
1418 | { | |
1419 | int *frameNum = arg; | |
1420 | int ret; | |
1421 | ||
1422 | if (*frameNum < 0 || *frameNum >= USBVIDEO_NUMFRAMES) | |
1423 | return -EINVAL; | |
d56410e0 | 1424 | |
1da177e4 LT |
1425 | if (uvd->debug >= 1) |
1426 | info("VIDIOCSYNC: syncing to frame %d.", *frameNum); | |
1427 | if (uvd->flags & FLAGS_NO_DECODING) | |
1428 | ret = usbvideo_GetFrame(uvd, *frameNum); | |
1429 | else if (VALID_CALLBACK(uvd, getFrame)) { | |
1430 | ret = GET_CALLBACK(uvd, getFrame)(uvd, *frameNum); | |
1431 | if ((ret < 0) && (uvd->debug >= 1)) { | |
1432 | err("VIDIOCSYNC: getFrame() returned %d.", ret); | |
1433 | } | |
1434 | } else { | |
1435 | err("VIDIOCSYNC: getFrame is not set"); | |
1436 | ret = -EFAULT; | |
1437 | } | |
1438 | ||
1439 | /* | |
1440 | * The frame is in FrameState_Done_Hold state. Release it | |
1441 | * right now because its data is already mapped into | |
1442 | * the user space and it's up to the application to | |
1443 | * make use of it until it asks for another frame. | |
1444 | */ | |
1445 | uvd->frame[*frameNum].frameState = FrameState_Unused; | |
1446 | return ret; | |
1447 | } | |
1448 | case VIDIOCGFBUF: | |
1449 | { | |
1450 | struct video_buffer *vb = arg; | |
1451 | ||
1452 | memset(vb, 0, sizeof(*vb)); | |
d56410e0 MCC |
1453 | return 0; |
1454 | } | |
1da177e4 LT |
1455 | case VIDIOCKEY: |
1456 | return 0; | |
1457 | ||
1458 | case VIDIOCCAPTURE: | |
1459 | return -EINVAL; | |
1460 | ||
1461 | case VIDIOCSFBUF: | |
1462 | ||
1463 | case VIDIOCGTUNER: | |
1464 | case VIDIOCSTUNER: | |
1465 | ||
1466 | case VIDIOCGFREQ: | |
1467 | case VIDIOCSFREQ: | |
1468 | ||
1469 | case VIDIOCGAUDIO: | |
1470 | case VIDIOCSAUDIO: | |
1471 | return -EINVAL; | |
1472 | ||
1473 | default: | |
1474 | return -ENOIOCTLCMD; | |
1475 | } | |
1476 | return 0; | |
1477 | } | |
1478 | ||
1479 | static int usbvideo_v4l_ioctl(struct inode *inode, struct file *file, | |
1480 | unsigned int cmd, unsigned long arg) | |
1481 | { | |
1482 | return video_usercopy(inode, file, cmd, arg, usbvideo_v4l_do_ioctl); | |
1483 | } | |
1484 | ||
1485 | /* | |
1486 | * usbvideo_v4l_read() | |
1487 | * | |
1488 | * This is mostly boring stuff. We simply ask for a frame and when it | |
1489 | * arrives copy all the video data from it into user space. There is | |
1490 | * no obvious need to override this method. | |
1491 | * | |
1492 | * History: | |
1493 | * 20-Oct-2000 Created. | |
1494 | * 01-Nov-2000 Added mutex (uvd->lock). | |
1495 | */ | |
1496 | static ssize_t usbvideo_v4l_read(struct file *file, char __user *buf, | |
1497 | size_t count, loff_t *ppos) | |
1498 | { | |
1499 | struct uvd *uvd = file->private_data; | |
1500 | int noblock = file->f_flags & O_NONBLOCK; | |
1501 | int frmx = -1, i; | |
1502 | struct usbvideo_frame *frame; | |
1503 | ||
1504 | if (!CAMERA_IS_OPERATIONAL(uvd) || (buf == NULL)) | |
1505 | return -EFAULT; | |
1506 | ||
1507 | if (uvd->debug >= 1) | |
4126a8f5 | 1508 | info("%s: %Zd. bytes, noblock=%d.", __func__, count, noblock); |
1da177e4 | 1509 | |
4186ecf8 | 1510 | mutex_lock(&uvd->lock); |
1da177e4 LT |
1511 | |
1512 | /* See if a frame is completed, then use it. */ | |
1513 | for(i = 0; i < USBVIDEO_NUMFRAMES; i++) { | |
1514 | if ((uvd->frame[i].frameState == FrameState_Done) || | |
1515 | (uvd->frame[i].frameState == FrameState_Done_Hold) || | |
1516 | (uvd->frame[i].frameState == FrameState_Error)) { | |
1517 | frmx = i; | |
1518 | break; | |
1519 | } | |
1520 | } | |
1521 | ||
1522 | /* FIXME: If we don't start a frame here then who ever does? */ | |
1523 | if (noblock && (frmx == -1)) { | |
1524 | count = -EAGAIN; | |
1525 | goto read_done; | |
1526 | } | |
1527 | ||
1528 | /* | |
1529 | * If no FrameState_Done, look for a FrameState_Grabbing state. | |
1530 | * See if a frame is in process (grabbing), then use it. | |
1531 | * We will need to wait until it becomes cooked, of course. | |
1532 | */ | |
1533 | if (frmx == -1) { | |
1534 | for(i = 0; i < USBVIDEO_NUMFRAMES; i++) { | |
1535 | if (uvd->frame[i].frameState == FrameState_Grabbing) { | |
1536 | frmx = i; | |
1537 | break; | |
1538 | } | |
1539 | } | |
1540 | } | |
1541 | ||
1542 | /* | |
1543 | * If no frame is active, start one. We don't care which one | |
1544 | * it will be, so #0 is as good as any. | |
1545 | * In read access mode we don't have convenience of VIDIOCMCAPTURE | |
1546 | * to specify the requested palette (video format) on per-frame | |
1547 | * basis. This means that we have to return data in -some- format | |
1548 | * and just hope that the client knows what to do with it. | |
1549 | * The default format is configured in uvd->defaultPalette field | |
1550 | * as one of VIDEO_PALETTE_xxx values. We stuff it into the new | |
1551 | * frame and initiate the frame filling process. | |
1552 | */ | |
1553 | if (frmx == -1) { | |
1554 | if (uvd->defaultPalette == 0) { | |
4126a8f5 | 1555 | err("%s: No default palette; don't know what to do!", __func__); |
1da177e4 LT |
1556 | count = -EFAULT; |
1557 | goto read_done; | |
1558 | } | |
1559 | frmx = 0; | |
1560 | /* | |
1561 | * We have no per-frame control over video size. | |
1562 | * Therefore we only can use whatever size was | |
1563 | * specified as default. | |
1564 | */ | |
1565 | uvd->frame[frmx].request = uvd->videosize; | |
1566 | uvd->frame[frmx].palette = uvd->defaultPalette; | |
1567 | uvd->frame[frmx].frameState = FrameState_Ready; | |
1568 | usbvideo_NewFrame(uvd, frmx); | |
1569 | /* Now frame 0 is supposed to start filling... */ | |
1570 | } | |
1571 | ||
1572 | /* | |
1573 | * Get a pointer to the active frame. It is either previously | |
1574 | * completed frame or frame in progress but not completed yet. | |
1575 | */ | |
1576 | frame = &uvd->frame[frmx]; | |
1577 | ||
1578 | /* | |
1579 | * Sit back & wait until the frame gets filled and postprocessed. | |
1580 | * If we fail to get the picture [in time] then return the error. | |
1581 | * In this call we specify that we want the frame to be waited for, | |
1582 | * postprocessed and switched into FrameState_Done_Hold state. This | |
1583 | * state is used to hold the frame as "fully completed" between | |
1584 | * subsequent partial reads of the same frame. | |
1585 | */ | |
1586 | if (frame->frameState != FrameState_Done_Hold) { | |
1587 | long rv = -EFAULT; | |
1588 | if (uvd->flags & FLAGS_NO_DECODING) | |
1589 | rv = usbvideo_GetFrame(uvd, frmx); | |
1590 | else if (VALID_CALLBACK(uvd, getFrame)) | |
1591 | rv = GET_CALLBACK(uvd, getFrame)(uvd, frmx); | |
1592 | else | |
1593 | err("getFrame is not set"); | |
1594 | if ((rv != 0) || (frame->frameState != FrameState_Done_Hold)) { | |
1595 | count = rv; | |
1596 | goto read_done; | |
1597 | } | |
1598 | } | |
1599 | ||
1600 | /* | |
1601 | * Copy bytes to user space. We allow for partial reads, which | |
1602 | * means that the user application can request read less than | |
1603 | * the full frame size. It is up to the application to issue | |
1604 | * subsequent calls until entire frame is read. | |
1605 | * | |
1606 | * First things first, make sure we don't copy more than we | |
1607 | * have - even if the application wants more. That would be | |
1608 | * a big security embarassment! | |
1609 | */ | |
1610 | if ((count + frame->seqRead_Index) > frame->seqRead_Length) | |
1611 | count = frame->seqRead_Length - frame->seqRead_Index; | |
1612 | ||
1613 | /* | |
1614 | * Copy requested amount of data to user space. We start | |
1615 | * copying from the position where we last left it, which | |
1616 | * will be zero for a new frame (not read before). | |
1617 | */ | |
1618 | if (copy_to_user(buf, frame->data + frame->seqRead_Index, count)) { | |
1619 | count = -EFAULT; | |
1620 | goto read_done; | |
1621 | } | |
1622 | ||
1623 | /* Update last read position */ | |
1624 | frame->seqRead_Index += count; | |
1625 | if (uvd->debug >= 1) { | |
1626 | err("%s: {copy} count used=%Zd, new seqRead_Index=%ld", | |
4126a8f5 | 1627 | __func__, count, frame->seqRead_Index); |
1da177e4 LT |
1628 | } |
1629 | ||
1630 | /* Finally check if the frame is done with and "release" it */ | |
1631 | if (frame->seqRead_Index >= frame->seqRead_Length) { | |
1632 | /* All data has been read */ | |
1633 | frame->seqRead_Index = 0; | |
1634 | ||
1635 | /* Mark it as available to be used again. */ | |
1636 | uvd->frame[frmx].frameState = FrameState_Unused; | |
1637 | if (usbvideo_NewFrame(uvd, (frmx + 1) % USBVIDEO_NUMFRAMES)) { | |
4126a8f5 | 1638 | err("%s: usbvideo_NewFrame failed.", __func__); |
1da177e4 LT |
1639 | } |
1640 | } | |
1641 | read_done: | |
4186ecf8 | 1642 | mutex_unlock(&uvd->lock); |
1da177e4 LT |
1643 | return count; |
1644 | } | |
1645 | ||
1646 | /* | |
1647 | * Make all of the blocks of data contiguous | |
1648 | */ | |
1649 | static int usbvideo_CompressIsochronous(struct uvd *uvd, struct urb *urb) | |
1650 | { | |
1651 | char *cdata; | |
1652 | int i, totlen = 0; | |
1653 | ||
1654 | for (i = 0; i < urb->number_of_packets; i++) { | |
1655 | int n = urb->iso_frame_desc[i].actual_length; | |
1656 | int st = urb->iso_frame_desc[i].status; | |
1657 | ||
1658 | cdata = urb->transfer_buffer + urb->iso_frame_desc[i].offset; | |
1659 | ||
1660 | /* Detect and ignore errored packets */ | |
1661 | if (st < 0) { | |
1662 | if (uvd->debug >= 1) | |
1663 | err("Data error: packet=%d. len=%d. status=%d.", i, n, st); | |
1664 | uvd->stats.iso_err_count++; | |
1665 | continue; | |
1666 | } | |
1667 | ||
1668 | /* Detect and ignore empty packets */ | |
1669 | if (n <= 0) { | |
1670 | uvd->stats.iso_skip_count++; | |
1671 | continue; | |
1672 | } | |
1673 | totlen += n; /* Little local accounting */ | |
1674 | RingQueue_Enqueue(&uvd->dp, cdata, n); | |
1675 | } | |
1676 | return totlen; | |
1677 | } | |
1678 | ||
7d12e780 | 1679 | static void usbvideo_IsocIrq(struct urb *urb) |
1da177e4 LT |
1680 | { |
1681 | int i, ret, len; | |
1682 | struct uvd *uvd = urb->context; | |
1683 | ||
1684 | /* We don't want to do anything if we are about to be removed! */ | |
1685 | if (!CAMERA_IS_OPERATIONAL(uvd)) | |
1686 | return; | |
1687 | #if 0 | |
1688 | if (urb->actual_length > 0) { | |
1689 | info("urb=$%p status=%d. errcount=%d. length=%d.", | |
1690 | urb, urb->status, urb->error_count, urb->actual_length); | |
1691 | } else { | |
1692 | static int c = 0; | |
1693 | if (c++ % 100 == 0) | |
1694 | info("No Isoc data"); | |
1695 | } | |
1696 | #endif | |
1697 | ||
1698 | if (!uvd->streaming) { | |
1699 | if (uvd->debug >= 1) | |
1700 | info("Not streaming, but interrupt!"); | |
1701 | return; | |
1702 | } | |
d56410e0 | 1703 | |
1da177e4 LT |
1704 | uvd->stats.urb_count++; |
1705 | if (urb->actual_length <= 0) | |
1706 | goto urb_done_with; | |
1707 | ||
1708 | /* Copy the data received into ring queue */ | |
1709 | len = usbvideo_CompressIsochronous(uvd, urb); | |
1710 | uvd->stats.urb_length = len; | |
1711 | if (len <= 0) | |
1712 | goto urb_done_with; | |
1713 | ||
1714 | /* Here we got some data */ | |
1715 | uvd->stats.data_count += len; | |
1716 | RingQueue_WakeUpInterruptible(&uvd->dp); | |
1717 | ||
1718 | urb_done_with: | |
1719 | for (i = 0; i < FRAMES_PER_DESC; i++) { | |
1720 | urb->iso_frame_desc[i].status = 0; | |
1721 | urb->iso_frame_desc[i].actual_length = 0; | |
1722 | } | |
1723 | urb->status = 0; | |
1724 | urb->dev = uvd->dev; | |
1725 | ret = usb_submit_urb (urb, GFP_KERNEL); | |
1726 | if(ret) | |
1727 | err("usb_submit_urb error (%d)", ret); | |
1728 | return; | |
1729 | } | |
1730 | ||
1731 | /* | |
1732 | * usbvideo_StartDataPump() | |
1733 | * | |
1734 | * History: | |
1735 | * 27-Jan-2000 Used ibmcam->iface, ibmcam->ifaceAltActive instead | |
1736 | * of hardcoded values. Simplified by using for loop, | |
1737 | * allowed any number of URBs. | |
1738 | */ | |
1739 | static int usbvideo_StartDataPump(struct uvd *uvd) | |
1740 | { | |
1741 | struct usb_device *dev = uvd->dev; | |
1742 | int i, errFlag; | |
1743 | ||
1744 | if (uvd->debug > 1) | |
4126a8f5 | 1745 | info("%s($%p)", __func__, uvd); |
1da177e4 LT |
1746 | |
1747 | if (!CAMERA_IS_OPERATIONAL(uvd)) { | |
4126a8f5 | 1748 | err("%s: Camera is not operational", __func__); |
1da177e4 LT |
1749 | return -EFAULT; |
1750 | } | |
1751 | uvd->curframe = -1; | |
1752 | ||
1753 | /* Alternate interface 1 is is the biggest frame size */ | |
1754 | i = usb_set_interface(dev, uvd->iface, uvd->ifaceAltActive); | |
1755 | if (i < 0) { | |
4126a8f5 | 1756 | err("%s: usb_set_interface error", __func__); |
1da177e4 LT |
1757 | uvd->last_error = i; |
1758 | return -EBUSY; | |
1759 | } | |
1760 | if (VALID_CALLBACK(uvd, videoStart)) | |
1761 | GET_CALLBACK(uvd, videoStart)(uvd); | |
d56410e0 | 1762 | else |
4126a8f5 | 1763 | err("%s: videoStart not set", __func__); |
1da177e4 LT |
1764 | |
1765 | /* We double buffer the Iso lists */ | |
1766 | for (i=0; i < USBVIDEO_NUMSBUF; i++) { | |
1767 | int j, k; | |
1768 | struct urb *urb = uvd->sbuf[i].urb; | |
1769 | urb->dev = dev; | |
1770 | urb->context = uvd; | |
1771 | urb->pipe = usb_rcvisocpipe(dev, uvd->video_endp); | |
1772 | urb->interval = 1; | |
1773 | urb->transfer_flags = URB_ISO_ASAP; | |
1774 | urb->transfer_buffer = uvd->sbuf[i].data; | |
1775 | urb->complete = usbvideo_IsocIrq; | |
1776 | urb->number_of_packets = FRAMES_PER_DESC; | |
1777 | urb->transfer_buffer_length = uvd->iso_packet_len * FRAMES_PER_DESC; | |
1778 | for (j=k=0; j < FRAMES_PER_DESC; j++, k += uvd->iso_packet_len) { | |
1779 | urb->iso_frame_desc[j].offset = k; | |
1780 | urb->iso_frame_desc[j].length = uvd->iso_packet_len; | |
1781 | } | |
1782 | } | |
1783 | ||
1784 | /* Submit all URBs */ | |
1785 | for (i=0; i < USBVIDEO_NUMSBUF; i++) { | |
1786 | errFlag = usb_submit_urb(uvd->sbuf[i].urb, GFP_KERNEL); | |
1787 | if (errFlag) | |
4126a8f5 | 1788 | err("%s: usb_submit_isoc(%d) ret %d", __func__, i, errFlag); |
1da177e4 LT |
1789 | } |
1790 | ||
1791 | uvd->streaming = 1; | |
1792 | if (uvd->debug > 1) | |
4126a8f5 | 1793 | info("%s: streaming=1 video_endp=$%02x", __func__, uvd->video_endp); |
1da177e4 LT |
1794 | return 0; |
1795 | } | |
1796 | ||
1797 | /* | |
1798 | * usbvideo_StopDataPump() | |
1799 | * | |
1800 | * This procedure stops streaming and deallocates URBs. Then it | |
1801 | * activates zero-bandwidth alt. setting of the video interface. | |
1802 | * | |
1803 | * History: | |
1804 | * 22-Jan-2000 Corrected order of actions to work after surprise removal. | |
1805 | * 27-Jan-2000 Used uvd->iface, uvd->ifaceAltInactive instead of hardcoded values. | |
1806 | */ | |
1807 | static void usbvideo_StopDataPump(struct uvd *uvd) | |
1808 | { | |
1809 | int i, j; | |
1810 | ||
1811 | if ((uvd == NULL) || (!uvd->streaming) || (uvd->dev == NULL)) | |
1812 | return; | |
1813 | ||
1814 | if (uvd->debug > 1) | |
4126a8f5 | 1815 | info("%s($%p)", __func__, uvd); |
1da177e4 LT |
1816 | |
1817 | /* Unschedule all of the iso td's */ | |
1818 | for (i=0; i < USBVIDEO_NUMSBUF; i++) { | |
1819 | usb_kill_urb(uvd->sbuf[i].urb); | |
1820 | } | |
1821 | if (uvd->debug > 1) | |
4126a8f5 | 1822 | info("%s: streaming=0", __func__); |
1da177e4 LT |
1823 | uvd->streaming = 0; |
1824 | ||
1825 | if (!uvd->remove_pending) { | |
1826 | /* Invoke minidriver's magic to stop the camera */ | |
1827 | if (VALID_CALLBACK(uvd, videoStop)) | |
1828 | GET_CALLBACK(uvd, videoStop)(uvd); | |
d56410e0 | 1829 | else |
4126a8f5 | 1830 | err("%s: videoStop not set", __func__); |
1da177e4 LT |
1831 | |
1832 | /* Set packet size to 0 */ | |
1833 | j = usb_set_interface(uvd->dev, uvd->iface, uvd->ifaceAltInactive); | |
1834 | if (j < 0) { | |
4126a8f5 | 1835 | err("%s: usb_set_interface() error %d.", __func__, j); |
1da177e4 LT |
1836 | uvd->last_error = j; |
1837 | } | |
1838 | } | |
1839 | } | |
1840 | ||
1841 | /* | |
1842 | * usbvideo_NewFrame() | |
1843 | * | |
1844 | * History: | |
1845 | * 29-Mar-00 Added copying of previous frame into the current one. | |
1846 | * 6-Aug-00 Added model 3 video sizes, removed redundant width, height. | |
1847 | */ | |
1848 | static int usbvideo_NewFrame(struct uvd *uvd, int framenum) | |
1849 | { | |
1850 | struct usbvideo_frame *frame; | |
1851 | int n; | |
1852 | ||
1853 | if (uvd->debug > 1) | |
1854 | info("usbvideo_NewFrame($%p,%d.)", uvd, framenum); | |
1855 | ||
1856 | /* If we're not grabbing a frame right now and the other frame is */ | |
1857 | /* ready to be grabbed into, then use it instead */ | |
1858 | if (uvd->curframe != -1) | |
1859 | return 0; | |
1860 | ||
1861 | /* If necessary we adjust picture settings between frames */ | |
1862 | if (!uvd->settingsAdjusted) { | |
1863 | if (VALID_CALLBACK(uvd, adjustPicture)) | |
1864 | GET_CALLBACK(uvd, adjustPicture)(uvd); | |
1865 | uvd->settingsAdjusted = 1; | |
1866 | } | |
1867 | ||
1868 | n = (framenum + 1) % USBVIDEO_NUMFRAMES; | |
1869 | if (uvd->frame[n].frameState == FrameState_Ready) | |
1870 | framenum = n; | |
1871 | ||
1872 | frame = &uvd->frame[framenum]; | |
1873 | ||
1874 | frame->frameState = FrameState_Grabbing; | |
1875 | frame->scanstate = ScanState_Scanning; | |
1876 | frame->seqRead_Length = 0; /* Accumulated in xxx_parse_data() */ | |
1877 | frame->deinterlace = Deinterlace_None; | |
1878 | frame->flags = 0; /* No flags yet, up to minidriver (or us) to set them */ | |
1879 | uvd->curframe = framenum; | |
1880 | ||
1881 | /* | |
1882 | * Normally we would want to copy previous frame into the current one | |
1883 | * before we even start filling it with data; this allows us to stop | |
1884 | * filling at any moment; top portion of the frame will be new and | |
1885 | * bottom portion will stay as it was in previous frame. If we don't | |
1886 | * do that then missing chunks of video stream will result in flickering | |
1887 | * portions of old data whatever it was before. | |
1888 | * | |
1889 | * If we choose not to copy previous frame (to, for example, save few | |
1890 | * bus cycles - the frame can be pretty large!) then we have an option | |
1891 | * to clear the frame before using. If we experience losses in this | |
1892 | * mode then missing picture will be black (no flickering). | |
1893 | * | |
1894 | * Finally, if user chooses not to clean the current frame before | |
1895 | * filling it with data then the old data will be visible if we fail | |
1896 | * to refill entire frame with new data. | |
1897 | */ | |
1898 | if (!(uvd->flags & FLAGS_SEPARATE_FRAMES)) { | |
1899 | /* This copies previous frame into this one to mask losses */ | |
1900 | int prev = (framenum - 1 + USBVIDEO_NUMFRAMES) % USBVIDEO_NUMFRAMES; | |
1901 | memmove(frame->data, uvd->frame[prev].data, uvd->max_frame_size); | |
1902 | } else { | |
1903 | if (uvd->flags & FLAGS_CLEAN_FRAMES) { | |
1904 | /* This provides a "clean" frame but slows things down */ | |
1905 | memset(frame->data, 0, uvd->max_frame_size); | |
1906 | } | |
1907 | } | |
1908 | return 0; | |
1909 | } | |
1910 | ||
1911 | /* | |
1912 | * usbvideo_CollectRawData() | |
1913 | * | |
1914 | * This procedure can be used instead of 'processData' callback if you | |
1915 | * only want to dump the raw data from the camera into the output | |
1916 | * device (frame buffer). You can look at it with V4L client, but the | |
1917 | * image will be unwatchable. The main purpose of this code and of the | |
1918 | * mode FLAGS_NO_DECODING is debugging and capturing of datastreams from | |
1919 | * new, unknown cameras. This procedure will be automatically invoked | |
1920 | * instead of the specified callback handler when uvd->flags has bit | |
1921 | * FLAGS_NO_DECODING set. Therefore, any regular build of any driver | |
1922 | * based on usbvideo can use this feature at any time. | |
1923 | */ | |
1924 | static void usbvideo_CollectRawData(struct uvd *uvd, struct usbvideo_frame *frame) | |
1925 | { | |
1926 | int n; | |
1927 | ||
1928 | assert(uvd != NULL); | |
1929 | assert(frame != NULL); | |
1930 | ||
1931 | /* Try to move data from queue into frame buffer */ | |
1932 | n = RingQueue_GetLength(&uvd->dp); | |
1933 | if (n > 0) { | |
1934 | int m; | |
1935 | /* See how much space we have left */ | |
1936 | m = uvd->max_frame_size - frame->seqRead_Length; | |
1937 | if (n > m) | |
1938 | n = m; | |
1939 | /* Now move that much data into frame buffer */ | |
1940 | RingQueue_Dequeue( | |
1941 | &uvd->dp, | |
1942 | frame->data + frame->seqRead_Length, | |
1943 | m); | |
1944 | frame->seqRead_Length += m; | |
1945 | } | |
1946 | /* See if we filled the frame */ | |
1947 | if (frame->seqRead_Length >= uvd->max_frame_size) { | |
1948 | frame->frameState = FrameState_Done; | |
1949 | uvd->curframe = -1; | |
1950 | uvd->stats.frame_num++; | |
1951 | } | |
1952 | } | |
1953 | ||
1954 | static int usbvideo_GetFrame(struct uvd *uvd, int frameNum) | |
1955 | { | |
1956 | struct usbvideo_frame *frame = &uvd->frame[frameNum]; | |
1957 | ||
1958 | if (uvd->debug >= 2) | |
4126a8f5 | 1959 | info("%s($%p,%d.)", __func__, uvd, frameNum); |
1da177e4 LT |
1960 | |
1961 | switch (frame->frameState) { | |
d56410e0 | 1962 | case FrameState_Unused: |
1da177e4 | 1963 | if (uvd->debug >= 2) |
4126a8f5 | 1964 | info("%s: FrameState_Unused", __func__); |
1da177e4 | 1965 | return -EINVAL; |
d56410e0 MCC |
1966 | case FrameState_Ready: |
1967 | case FrameState_Grabbing: | |
1968 | case FrameState_Error: | |
1969 | { | |
1da177e4 LT |
1970 | int ntries, signalPending; |
1971 | redo: | |
1972 | if (!CAMERA_IS_OPERATIONAL(uvd)) { | |
1973 | if (uvd->debug >= 2) | |
4126a8f5 | 1974 | info("%s: Camera is not operational (1)", __func__); |
1da177e4 LT |
1975 | return -EIO; |
1976 | } | |
d56410e0 | 1977 | ntries = 0; |
1da177e4 LT |
1978 | do { |
1979 | RingQueue_InterruptibleSleepOn(&uvd->dp); | |
1980 | signalPending = signal_pending(current); | |
1981 | if (!CAMERA_IS_OPERATIONAL(uvd)) { | |
1982 | if (uvd->debug >= 2) | |
4126a8f5 | 1983 | info("%s: Camera is not operational (2)", __func__); |
1da177e4 LT |
1984 | return -EIO; |
1985 | } | |
1986 | assert(uvd->fbuf != NULL); | |
1987 | if (signalPending) { | |
1988 | if (uvd->debug >= 2) | |
4126a8f5 | 1989 | info("%s: Signal=$%08x", __func__, signalPending); |
1da177e4 LT |
1990 | if (uvd->flags & FLAGS_RETRY_VIDIOCSYNC) { |
1991 | usbvideo_TestPattern(uvd, 1, 0); | |
1992 | uvd->curframe = -1; | |
1993 | uvd->stats.frame_num++; | |
1994 | if (uvd->debug >= 2) | |
4126a8f5 | 1995 | info("%s: Forced test pattern screen", __func__); |
1da177e4 LT |
1996 | return 0; |
1997 | } else { | |
1998 | /* Standard answer: Interrupted! */ | |
1999 | if (uvd->debug >= 2) | |
4126a8f5 | 2000 | info("%s: Interrupted!", __func__); |
1da177e4 LT |
2001 | return -EINTR; |
2002 | } | |
2003 | } else { | |
2004 | /* No signals - we just got new data in dp queue */ | |
2005 | if (uvd->flags & FLAGS_NO_DECODING) | |
2006 | usbvideo_CollectRawData(uvd, frame); | |
2007 | else if (VALID_CALLBACK(uvd, processData)) | |
2008 | GET_CALLBACK(uvd, processData)(uvd, frame); | |
d56410e0 | 2009 | else |
4126a8f5 | 2010 | err("%s: processData not set", __func__); |
1da177e4 LT |
2011 | } |
2012 | } while (frame->frameState == FrameState_Grabbing); | |
2013 | if (uvd->debug >= 2) { | |
2014 | info("%s: Grabbing done; state=%d. (%lu. bytes)", | |
4126a8f5 | 2015 | __func__, frame->frameState, frame->seqRead_Length); |
1da177e4 LT |
2016 | } |
2017 | if (frame->frameState == FrameState_Error) { | |
2018 | int ret = usbvideo_NewFrame(uvd, frameNum); | |
2019 | if (ret < 0) { | |
4126a8f5 | 2020 | err("%s: usbvideo_NewFrame() failed (%d.)", __func__, ret); |
1da177e4 LT |
2021 | return ret; |
2022 | } | |
2023 | goto redo; | |
2024 | } | |
2025 | /* Note that we fall through to meet our destiny below */ | |
d56410e0 MCC |
2026 | } |
2027 | case FrameState_Done: | |
1da177e4 LT |
2028 | /* |
2029 | * Do all necessary postprocessing of data prepared in | |
2030 | * "interrupt" code and the collecting code above. The | |
2031 | * frame gets marked as FrameState_Done by queue parsing code. | |
2032 | * This status means that we collected enough data and | |
2033 | * most likely processed it as we went through. However | |
2034 | * the data may need postprocessing, such as deinterlacing | |
2035 | * or picture adjustments implemented in software (horror!) | |
2036 | * | |
2037 | * As soon as the frame becomes "final" it gets promoted to | |
2038 | * FrameState_Done_Hold status where it will remain until the | |
2039 | * caller consumed all the video data from the frame. Then | |
2040 | * the empty shell of ex-frame is thrown out for dogs to eat. | |
2041 | * But we, worried about pets, will recycle the frame! | |
2042 | */ | |
2043 | uvd->stats.frame_num++; | |
2044 | if ((uvd->flags & FLAGS_NO_DECODING) == 0) { | |
2045 | if (VALID_CALLBACK(uvd, postProcess)) | |
2046 | GET_CALLBACK(uvd, postProcess)(uvd, frame); | |
2047 | if (frame->flags & USBVIDEO_FRAME_FLAG_SOFTWARE_CONTRAST) | |
2048 | usbvideo_SoftwareContrastAdjustment(uvd, frame); | |
2049 | } | |
2050 | frame->frameState = FrameState_Done_Hold; | |
2051 | if (uvd->debug >= 2) | |
4126a8f5 | 2052 | info("%s: Entered FrameState_Done_Hold state.", __func__); |
1da177e4 LT |
2053 | return 0; |
2054 | ||
2055 | case FrameState_Done_Hold: | |
2056 | /* | |
2057 | * We stay in this state indefinitely until someone external, | |
2058 | * like ioctl() or read() call finishes digesting the frame | |
2059 | * data. Then it will mark the frame as FrameState_Unused and | |
2060 | * it will be released back into the wild to roam freely. | |
2061 | */ | |
2062 | if (uvd->debug >= 2) | |
4126a8f5 | 2063 | info("%s: FrameState_Done_Hold state.", __func__); |
1da177e4 LT |
2064 | return 0; |
2065 | } | |
2066 | ||
2067 | /* Catch-all for other cases. We shall not be here. */ | |
4126a8f5 | 2068 | err("%s: Invalid state %d.", __func__, frame->frameState); |
1da177e4 LT |
2069 | frame->frameState = FrameState_Unused; |
2070 | return 0; | |
2071 | } | |
2072 | ||
2073 | /* | |
2074 | * usbvideo_DeinterlaceFrame() | |
2075 | * | |
2076 | * This procedure deinterlaces the given frame. Some cameras produce | |
2077 | * only half of scanlines - sometimes only even lines, sometimes only | |
2078 | * odd lines. The deinterlacing method is stored in frame->deinterlace | |
2079 | * variable. | |
2080 | * | |
2081 | * Here we scan the frame vertically and replace missing scanlines with | |
2082 | * average between surrounding ones - before and after. If we have no | |
2083 | * line above then we just copy next line. Similarly, if we need to | |
2084 | * create a last line then preceding line is used. | |
2085 | */ | |
2086 | void usbvideo_DeinterlaceFrame(struct uvd *uvd, struct usbvideo_frame *frame) | |
2087 | { | |
2088 | if ((uvd == NULL) || (frame == NULL)) | |
2089 | return; | |
2090 | ||
2091 | if ((frame->deinterlace == Deinterlace_FillEvenLines) || | |
2092 | (frame->deinterlace == Deinterlace_FillOddLines)) | |
2093 | { | |
2094 | const int v4l_linesize = VIDEOSIZE_X(frame->request) * V4L_BYTES_PER_PIXEL; | |
2095 | int i = (frame->deinterlace == Deinterlace_FillEvenLines) ? 0 : 1; | |
2096 | ||
2097 | for (; i < VIDEOSIZE_Y(frame->request); i += 2) { | |
2098 | const unsigned char *fs1, *fs2; | |
2099 | unsigned char *fd; | |
2100 | int ip, in, j; /* Previous and next lines */ | |
2101 | ||
2102 | /* | |
2103 | * Need to average lines before and after 'i'. | |
2104 | * If we go out of bounds seeking those lines then | |
2105 | * we point back to existing line. | |
2106 | */ | |
2107 | ip = i - 1; /* First, get rough numbers */ | |
2108 | in = i + 1; | |
2109 | ||
2110 | /* Now validate */ | |
2111 | if (ip < 0) | |
2112 | ip = in; | |
2113 | if (in >= VIDEOSIZE_Y(frame->request)) | |
2114 | in = ip; | |
2115 | ||
2116 | /* Sanity check */ | |
2117 | if ((ip < 0) || (in < 0) || | |
2118 | (ip >= VIDEOSIZE_Y(frame->request)) || | |
2119 | (in >= VIDEOSIZE_Y(frame->request))) | |
2120 | { | |
2121 | err("Error: ip=%d. in=%d. req.height=%ld.", | |
2122 | ip, in, VIDEOSIZE_Y(frame->request)); | |
2123 | break; | |
2124 | } | |
2125 | ||
2126 | /* Now we need to average lines 'ip' and 'in' to produce line 'i' */ | |
2127 | fs1 = frame->data + (v4l_linesize * ip); | |
2128 | fs2 = frame->data + (v4l_linesize * in); | |
2129 | fd = frame->data + (v4l_linesize * i); | |
2130 | ||
2131 | /* Average lines around destination */ | |
2132 | for (j=0; j < v4l_linesize; j++) { | |
2133 | fd[j] = (unsigned char)((((unsigned) fs1[j]) + | |
2134 | ((unsigned)fs2[j])) >> 1); | |
2135 | } | |
2136 | } | |
2137 | } | |
2138 | ||
2139 | /* Optionally display statistics on the screen */ | |
2140 | if (uvd->flags & FLAGS_OVERLAY_STATS) | |
2141 | usbvideo_OverlayStats(uvd, frame); | |
2142 | } | |
2143 | ||
2144 | EXPORT_SYMBOL(usbvideo_DeinterlaceFrame); | |
2145 | ||
2146 | /* | |
2147 | * usbvideo_SoftwareContrastAdjustment() | |
2148 | * | |
2149 | * This code adjusts the contrast of the frame, assuming RGB24 format. | |
2150 | * As most software image processing, this job is CPU-intensive. | |
2151 | * Get a camera that supports hardware adjustment! | |
2152 | * | |
2153 | * History: | |
2154 | * 09-Feb-2001 Created. | |
2155 | */ | |
d56410e0 | 2156 | static void usbvideo_SoftwareContrastAdjustment(struct uvd *uvd, |
1da177e4 LT |
2157 | struct usbvideo_frame *frame) |
2158 | { | |
2159 | int i, j, v4l_linesize; | |
2160 | signed long adj; | |
2161 | const int ccm = 128; /* Color correction median - see below */ | |
2162 | ||
2163 | if ((uvd == NULL) || (frame == NULL)) { | |
4126a8f5 | 2164 | err("%s: Illegal call.", __func__); |
1da177e4 LT |
2165 | return; |
2166 | } | |
2167 | adj = (uvd->vpic.contrast - 0x8000) >> 8; /* -128..+127 = -ccm..+(ccm-1)*/ | |
2168 | RESTRICT_TO_RANGE(adj, -ccm, ccm+1); | |
2169 | if (adj == 0) { | |
2170 | /* In rare case of no adjustment */ | |
2171 | return; | |
2172 | } | |
2173 | v4l_linesize = VIDEOSIZE_X(frame->request) * V4L_BYTES_PER_PIXEL; | |
2174 | for (i=0; i < VIDEOSIZE_Y(frame->request); i++) { | |
2175 | unsigned char *fd = frame->data + (v4l_linesize * i); | |
2176 | for (j=0; j < v4l_linesize; j++) { | |
2177 | signed long v = (signed long) fd[j]; | |
2178 | /* Magnify up to 2 times, reduce down to zero */ | |
2179 | v = 128 + ((ccm + adj) * (v - 128)) / ccm; | |
2180 | RESTRICT_TO_RANGE(v, 0, 0xFF); /* Must flatten tails */ | |
2181 | fd[j] = (unsigned char) v; | |
2182 | } | |
2183 | } | |
2184 | } | |
2185 | ||
2186 | MODULE_LICENSE("GPL"); |