Commit | Line | Data |
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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> | |
23 | #include <linux/smp_lock.h> | |
24 | #include <linux/vmalloc.h> | |
25 | #include <linux/init.h> | |
26 | #include <linux/spinlock.h> | |
27 | ||
28 | #include <asm/io.h> | |
29 | ||
30 | #include "usbvideo.h" | |
31 | ||
32 | #if defined(MAP_NR) | |
33 | #define virt_to_page(v) MAP_NR(v) /* Kernels 2.2.x */ | |
34 | #endif | |
35 | ||
36 | static int video_nr = -1; | |
37 | module_param(video_nr, int, 0); | |
38 | ||
39 | /* | |
40 | * Local prototypes. | |
41 | */ | |
42 | static void usbvideo_Disconnect(struct usb_interface *intf); | |
43 | static void usbvideo_CameraRelease(struct uvd *uvd); | |
44 | ||
45 | static int usbvideo_v4l_ioctl(struct inode *inode, struct file *file, | |
46 | unsigned int cmd, unsigned long arg); | |
47 | static int usbvideo_v4l_mmap(struct file *file, struct vm_area_struct *vma); | |
48 | static int usbvideo_v4l_open(struct inode *inode, struct file *file); | |
49 | static ssize_t usbvideo_v4l_read(struct file *file, char __user *buf, | |
50 | size_t count, loff_t *ppos); | |
51 | static int usbvideo_v4l_close(struct inode *inode, struct file *file); | |
52 | ||
53 | static int usbvideo_StartDataPump(struct uvd *uvd); | |
54 | static void usbvideo_StopDataPump(struct uvd *uvd); | |
55 | static int usbvideo_GetFrame(struct uvd *uvd, int frameNum); | |
56 | static int usbvideo_NewFrame(struct uvd *uvd, int framenum); | |
57 | static void usbvideo_SoftwareContrastAdjustment(struct uvd *uvd, | |
58 | struct usbvideo_frame *frame); | |
59 | ||
60 | /*******************************/ | |
61 | /* Memory management functions */ | |
62 | /*******************************/ | |
63 | static void *usbvideo_rvmalloc(unsigned long size) | |
64 | { | |
65 | void *mem; | |
66 | unsigned long adr; | |
67 | ||
68 | size = PAGE_ALIGN(size); | |
69 | mem = vmalloc_32(size); | |
70 | if (!mem) | |
71 | return NULL; | |
72 | ||
73 | memset(mem, 0, size); /* Clear the ram out, no junk to the user */ | |
74 | adr = (unsigned long) mem; | |
75 | while (size > 0) { | |
76 | SetPageReserved(vmalloc_to_page((void *)adr)); | |
77 | adr += PAGE_SIZE; | |
78 | size -= PAGE_SIZE; | |
79 | } | |
80 | ||
81 | return mem; | |
82 | } | |
83 | ||
84 | static void usbvideo_rvfree(void *mem, unsigned long size) | |
85 | { | |
86 | unsigned long adr; | |
87 | ||
88 | if (!mem) | |
89 | return; | |
90 | ||
91 | adr = (unsigned long) mem; | |
92 | while ((long) size > 0) { | |
93 | ClearPageReserved(vmalloc_to_page((void *)adr)); | |
94 | adr += PAGE_SIZE; | |
95 | size -= PAGE_SIZE; | |
96 | } | |
97 | vfree(mem); | |
98 | } | |
99 | ||
100 | static void RingQueue_Initialize(struct RingQueue *rq) | |
101 | { | |
102 | assert(rq != NULL); | |
103 | init_waitqueue_head(&rq->wqh); | |
104 | } | |
105 | ||
106 | static void RingQueue_Allocate(struct RingQueue *rq, int rqLen) | |
107 | { | |
108 | /* Make sure the requested size is a power of 2 and | |
109 | round up if necessary. This allows index wrapping | |
110 | using masks rather than modulo */ | |
111 | ||
112 | int i = 1; | |
113 | assert(rq != NULL); | |
114 | assert(rqLen > 0); | |
115 | ||
116 | while(rqLen >> i) | |
117 | i++; | |
118 | if(rqLen != 1 << (i-1)) | |
119 | rqLen = 1 << i; | |
120 | ||
121 | rq->length = rqLen; | |
122 | rq->ri = rq->wi = 0; | |
123 | rq->queue = usbvideo_rvmalloc(rq->length); | |
124 | assert(rq->queue != NULL); | |
125 | } | |
126 | ||
127 | static int RingQueue_IsAllocated(const struct RingQueue *rq) | |
128 | { | |
129 | if (rq == NULL) | |
130 | return 0; | |
131 | return (rq->queue != NULL) && (rq->length > 0); | |
132 | } | |
133 | ||
134 | static void RingQueue_Free(struct RingQueue *rq) | |
135 | { | |
136 | assert(rq != NULL); | |
137 | if (RingQueue_IsAllocated(rq)) { | |
138 | usbvideo_rvfree(rq->queue, rq->length); | |
139 | rq->queue = NULL; | |
140 | rq->length = 0; | |
141 | } | |
142 | } | |
143 | ||
144 | int RingQueue_Dequeue(struct RingQueue *rq, unsigned char *dst, int len) | |
145 | { | |
146 | int rql, toread; | |
147 | ||
148 | assert(rq != NULL); | |
149 | assert(dst != NULL); | |
150 | ||
151 | rql = RingQueue_GetLength(rq); | |
152 | if(!rql) | |
153 | return 0; | |
154 | ||
155 | /* Clip requested length to available data */ | |
156 | if(len > rql) | |
157 | len = rql; | |
158 | ||
159 | toread = len; | |
160 | if(rq->ri > rq->wi) { | |
161 | /* Read data from tail */ | |
162 | int read = (toread < (rq->length - rq->ri)) ? toread : rq->length - rq->ri; | |
163 | memcpy(dst, rq->queue + rq->ri, read); | |
164 | toread -= read; | |
165 | dst += read; | |
166 | rq->ri = (rq->ri + read) & (rq->length-1); | |
167 | } | |
168 | if(toread) { | |
169 | /* Read data from head */ | |
170 | memcpy(dst, rq->queue + rq->ri, toread); | |
171 | rq->ri = (rq->ri + toread) & (rq->length-1); | |
172 | } | |
173 | return len; | |
174 | } | |
175 | ||
176 | EXPORT_SYMBOL(RingQueue_Dequeue); | |
177 | ||
178 | int RingQueue_Enqueue(struct RingQueue *rq, const unsigned char *cdata, int n) | |
179 | { | |
180 | int enqueued = 0; | |
181 | ||
182 | assert(rq != NULL); | |
183 | assert(cdata != NULL); | |
184 | assert(rq->length > 0); | |
185 | while (n > 0) { | |
186 | int m, q_avail; | |
187 | ||
188 | /* Calculate the largest chunk that fits the tail of the ring */ | |
189 | q_avail = rq->length - rq->wi; | |
190 | if (q_avail <= 0) { | |
191 | rq->wi = 0; | |
192 | q_avail = rq->length; | |
193 | } | |
194 | m = n; | |
195 | assert(q_avail > 0); | |
196 | if (m > q_avail) | |
197 | m = q_avail; | |
198 | ||
199 | memcpy(rq->queue + rq->wi, cdata, m); | |
200 | RING_QUEUE_ADVANCE_INDEX(rq, wi, m); | |
201 | cdata += m; | |
202 | enqueued += m; | |
203 | n -= m; | |
204 | } | |
205 | return enqueued; | |
206 | } | |
207 | ||
208 | EXPORT_SYMBOL(RingQueue_Enqueue); | |
209 | ||
210 | static void RingQueue_InterruptibleSleepOn(struct RingQueue *rq) | |
211 | { | |
212 | assert(rq != NULL); | |
213 | interruptible_sleep_on(&rq->wqh); | |
214 | } | |
215 | ||
216 | void RingQueue_WakeUpInterruptible(struct RingQueue *rq) | |
217 | { | |
218 | assert(rq != NULL); | |
219 | if (waitqueue_active(&rq->wqh)) | |
220 | wake_up_interruptible(&rq->wqh); | |
221 | } | |
222 | ||
223 | EXPORT_SYMBOL(RingQueue_WakeUpInterruptible); | |
224 | ||
225 | void RingQueue_Flush(struct RingQueue *rq) | |
226 | { | |
227 | assert(rq != NULL); | |
228 | rq->ri = 0; | |
229 | rq->wi = 0; | |
230 | } | |
231 | ||
232 | EXPORT_SYMBOL(RingQueue_Flush); | |
233 | ||
234 | ||
235 | /* | |
236 | * usbvideo_VideosizeToString() | |
237 | * | |
238 | * This procedure converts given videosize value to readable string. | |
239 | * | |
240 | * History: | |
241 | * 07-Aug-2000 Created. | |
242 | * 19-Oct-2000 Reworked for usbvideo module. | |
243 | */ | |
244 | static void usbvideo_VideosizeToString(char *buf, int bufLen, videosize_t vs) | |
245 | { | |
246 | char tmp[40]; | |
247 | int n; | |
248 | ||
249 | n = 1 + sprintf(tmp, "%ldx%ld", VIDEOSIZE_X(vs), VIDEOSIZE_Y(vs)); | |
250 | assert(n < sizeof(tmp)); | |
251 | if ((buf == NULL) || (bufLen < n)) | |
252 | err("usbvideo_VideosizeToString: buffer is too small."); | |
253 | else | |
254 | memmove(buf, tmp, n); | |
255 | } | |
256 | ||
257 | /* | |
258 | * usbvideo_OverlayChar() | |
259 | * | |
260 | * History: | |
261 | * 01-Feb-2000 Created. | |
262 | */ | |
263 | static void usbvideo_OverlayChar(struct uvd *uvd, struct usbvideo_frame *frame, | |
264 | int x, int y, int ch) | |
265 | { | |
266 | static const unsigned short digits[16] = { | |
267 | 0xF6DE, /* 0 */ | |
268 | 0x2492, /* 1 */ | |
269 | 0xE7CE, /* 2 */ | |
270 | 0xE79E, /* 3 */ | |
271 | 0xB792, /* 4 */ | |
272 | 0xF39E, /* 5 */ | |
273 | 0xF3DE, /* 6 */ | |
274 | 0xF492, /* 7 */ | |
275 | 0xF7DE, /* 8 */ | |
276 | 0xF79E, /* 9 */ | |
277 | 0x77DA, /* a */ | |
278 | 0xD75C, /* b */ | |
279 | 0xF24E, /* c */ | |
280 | 0xD6DC, /* d */ | |
281 | 0xF34E, /* e */ | |
282 | 0xF348 /* f */ | |
283 | }; | |
284 | unsigned short digit; | |
285 | int ix, iy; | |
286 | ||
287 | if ((uvd == NULL) || (frame == NULL)) | |
288 | return; | |
289 | ||
290 | if (ch >= '0' && ch <= '9') | |
291 | ch -= '0'; | |
292 | else if (ch >= 'A' && ch <= 'F') | |
293 | ch = 10 + (ch - 'A'); | |
294 | else if (ch >= 'a' && ch <= 'f') | |
295 | ch = 10 + (ch - 'a'); | |
296 | else | |
297 | return; | |
298 | digit = digits[ch]; | |
299 | ||
300 | for (iy=0; iy < 5; iy++) { | |
301 | for (ix=0; ix < 3; ix++) { | |
302 | if (digit & 0x8000) { | |
303 | if (uvd->paletteBits & (1L << VIDEO_PALETTE_RGB24)) { | |
304 | /* TODO */ RGB24_PUTPIXEL(frame, x+ix, y+iy, 0xFF, 0xFF, 0xFF); | |
305 | } | |
306 | } | |
307 | digit = digit << 1; | |
308 | } | |
309 | } | |
310 | } | |
311 | ||
312 | /* | |
313 | * usbvideo_OverlayString() | |
314 | * | |
315 | * History: | |
316 | * 01-Feb-2000 Created. | |
317 | */ | |
318 | static void usbvideo_OverlayString(struct uvd *uvd, struct usbvideo_frame *frame, | |
319 | int x, int y, const char *str) | |
320 | { | |
321 | while (*str) { | |
322 | usbvideo_OverlayChar(uvd, frame, x, y, *str); | |
323 | str++; | |
324 | x += 4; /* 3 pixels character + 1 space */ | |
325 | } | |
326 | } | |
327 | ||
328 | /* | |
329 | * usbvideo_OverlayStats() | |
330 | * | |
331 | * Overlays important debugging information. | |
332 | * | |
333 | * History: | |
334 | * 01-Feb-2000 Created. | |
335 | */ | |
336 | static void usbvideo_OverlayStats(struct uvd *uvd, struct usbvideo_frame *frame) | |
337 | { | |
338 | const int y_diff = 8; | |
339 | char tmp[16]; | |
340 | int x = 10, y=10; | |
341 | long i, j, barLength; | |
342 | const int qi_x1 = 60, qi_y1 = 10; | |
343 | const int qi_x2 = VIDEOSIZE_X(frame->request) - 10, qi_h = 10; | |
344 | ||
345 | /* Call the user callback, see if we may proceed after that */ | |
346 | if (VALID_CALLBACK(uvd, overlayHook)) { | |
347 | if (GET_CALLBACK(uvd, overlayHook)(uvd, frame) < 0) | |
348 | return; | |
349 | } | |
350 | ||
351 | /* | |
352 | * We draw a (mostly) hollow rectangle with qi_xxx coordinates. | |
353 | * Left edge symbolizes the queue index 0; right edge symbolizes | |
354 | * the full capacity of the queue. | |
355 | */ | |
356 | barLength = qi_x2 - qi_x1 - 2; | |
357 | if ((barLength > 10) && (uvd->paletteBits & (1L << VIDEO_PALETTE_RGB24))) { | |
358 | /* TODO */ long u_lo, u_hi, q_used; | |
359 | long m_ri, m_wi, m_lo, m_hi; | |
360 | ||
361 | /* | |
362 | * Determine fill zones (used areas of the queue): | |
363 | * 0 xxxxxxx u_lo ...... uvd->dp.ri xxxxxxxx u_hi ..... uvd->dp.length | |
364 | * | |
365 | * if u_lo < 0 then there is no first filler. | |
366 | */ | |
367 | ||
368 | q_used = RingQueue_GetLength(&uvd->dp); | |
369 | if ((uvd->dp.ri + q_used) >= uvd->dp.length) { | |
370 | u_hi = uvd->dp.length; | |
371 | u_lo = (q_used + uvd->dp.ri) & (uvd->dp.length-1); | |
372 | } else { | |
373 | u_hi = (q_used + uvd->dp.ri); | |
374 | u_lo = -1; | |
375 | } | |
376 | ||
377 | /* Convert byte indices into screen units */ | |
378 | m_ri = qi_x1 + ((barLength * uvd->dp.ri) / uvd->dp.length); | |
379 | m_wi = qi_x1 + ((barLength * uvd->dp.wi) / uvd->dp.length); | |
380 | m_lo = (u_lo > 0) ? (qi_x1 + ((barLength * u_lo) / uvd->dp.length)) : -1; | |
381 | m_hi = qi_x1 + ((barLength * u_hi) / uvd->dp.length); | |
382 | ||
383 | for (j=qi_y1; j < (qi_y1 + qi_h); j++) { | |
384 | for (i=qi_x1; i < qi_x2; i++) { | |
385 | /* Draw border lines */ | |
386 | if ((j == qi_y1) || (j == (qi_y1 + qi_h - 1)) || | |
387 | (i == qi_x1) || (i == (qi_x2 - 1))) { | |
388 | RGB24_PUTPIXEL(frame, i, j, 0xFF, 0xFF, 0xFF); | |
389 | continue; | |
390 | } | |
391 | /* For all other points the Y coordinate does not matter */ | |
392 | if ((i >= m_ri) && (i <= (m_ri + 3))) { | |
393 | RGB24_PUTPIXEL(frame, i, j, 0x00, 0xFF, 0x00); | |
394 | } else if ((i >= m_wi) && (i <= (m_wi + 3))) { | |
395 | RGB24_PUTPIXEL(frame, i, j, 0xFF, 0x00, 0x00); | |
396 | } else if ((i < m_lo) || ((i > m_ri) && (i < m_hi))) | |
397 | RGB24_PUTPIXEL(frame, i, j, 0x00, 0x00, 0xFF); | |
398 | } | |
399 | } | |
400 | } | |
401 | ||
402 | sprintf(tmp, "%8lx", uvd->stats.frame_num); | |
403 | usbvideo_OverlayString(uvd, frame, x, y, tmp); | |
404 | y += y_diff; | |
405 | ||
406 | sprintf(tmp, "%8lx", uvd->stats.urb_count); | |
407 | usbvideo_OverlayString(uvd, frame, x, y, tmp); | |
408 | y += y_diff; | |
409 | ||
410 | sprintf(tmp, "%8lx", uvd->stats.urb_length); | |
411 | usbvideo_OverlayString(uvd, frame, x, y, tmp); | |
412 | y += y_diff; | |
413 | ||
414 | sprintf(tmp, "%8lx", uvd->stats.data_count); | |
415 | usbvideo_OverlayString(uvd, frame, x, y, tmp); | |
416 | y += y_diff; | |
417 | ||
418 | sprintf(tmp, "%8lx", uvd->stats.header_count); | |
419 | usbvideo_OverlayString(uvd, frame, x, y, tmp); | |
420 | y += y_diff; | |
421 | ||
422 | sprintf(tmp, "%8lx", uvd->stats.iso_skip_count); | |
423 | usbvideo_OverlayString(uvd, frame, x, y, tmp); | |
424 | y += y_diff; | |
425 | ||
426 | sprintf(tmp, "%8lx", uvd->stats.iso_err_count); | |
427 | usbvideo_OverlayString(uvd, frame, x, y, tmp); | |
428 | y += y_diff; | |
429 | ||
430 | sprintf(tmp, "%8x", uvd->vpic.colour); | |
431 | usbvideo_OverlayString(uvd, frame, x, y, tmp); | |
432 | y += y_diff; | |
433 | ||
434 | sprintf(tmp, "%8x", uvd->vpic.hue); | |
435 | usbvideo_OverlayString(uvd, frame, x, y, tmp); | |
436 | y += y_diff; | |
437 | ||
438 | sprintf(tmp, "%8x", uvd->vpic.brightness >> 8); | |
439 | usbvideo_OverlayString(uvd, frame, x, y, tmp); | |
440 | y += y_diff; | |
441 | ||
442 | sprintf(tmp, "%8x", uvd->vpic.contrast >> 12); | |
443 | usbvideo_OverlayString(uvd, frame, x, y, tmp); | |
444 | y += y_diff; | |
445 | ||
446 | sprintf(tmp, "%8d", uvd->vpic.whiteness >> 8); | |
447 | usbvideo_OverlayString(uvd, frame, x, y, tmp); | |
448 | y += y_diff; | |
449 | } | |
450 | ||
451 | /* | |
452 | * usbvideo_ReportStatistics() | |
453 | * | |
454 | * This procedure prints packet and transfer statistics. | |
455 | * | |
456 | * History: | |
457 | * 14-Jan-2000 Corrected default multiplier. | |
458 | */ | |
459 | static void usbvideo_ReportStatistics(const struct uvd *uvd) | |
460 | { | |
461 | if ((uvd != NULL) && (uvd->stats.urb_count > 0)) { | |
462 | unsigned long allPackets, badPackets, goodPackets, percent; | |
463 | allPackets = uvd->stats.urb_count * CAMERA_URB_FRAMES; | |
464 | badPackets = uvd->stats.iso_skip_count + uvd->stats.iso_err_count; | |
465 | goodPackets = allPackets - badPackets; | |
466 | /* Calculate percentage wisely, remember integer limits */ | |
467 | assert(allPackets != 0); | |
468 | if (goodPackets < (((unsigned long)-1)/100)) | |
469 | percent = (100 * goodPackets) / allPackets; | |
470 | else | |
471 | percent = goodPackets / (allPackets / 100); | |
472 | info("Packet Statistics: Total=%lu. Empty=%lu. Usage=%lu%%", | |
473 | allPackets, badPackets, percent); | |
474 | if (uvd->iso_packet_len > 0) { | |
475 | unsigned long allBytes, xferBytes; | |
476 | char multiplier = ' '; | |
477 | allBytes = allPackets * uvd->iso_packet_len; | |
478 | xferBytes = uvd->stats.data_count; | |
479 | assert(allBytes != 0); | |
480 | if (xferBytes < (((unsigned long)-1)/100)) | |
481 | percent = (100 * xferBytes) / allBytes; | |
482 | else | |
483 | percent = xferBytes / (allBytes / 100); | |
484 | /* Scale xferBytes for easy reading */ | |
485 | if (xferBytes > 10*1024) { | |
486 | xferBytes /= 1024; | |
487 | multiplier = 'K'; | |
488 | if (xferBytes > 10*1024) { | |
489 | xferBytes /= 1024; | |
490 | multiplier = 'M'; | |
491 | if (xferBytes > 10*1024) { | |
492 | xferBytes /= 1024; | |
493 | multiplier = 'G'; | |
494 | if (xferBytes > 10*1024) { | |
495 | xferBytes /= 1024; | |
496 | multiplier = 'T'; | |
497 | } | |
498 | } | |
499 | } | |
500 | } | |
501 | info("Transfer Statistics: Transferred=%lu%cB Usage=%lu%%", | |
502 | xferBytes, multiplier, percent); | |
503 | } | |
504 | } | |
505 | } | |
506 | ||
507 | /* | |
508 | * usbvideo_TestPattern() | |
509 | * | |
510 | * Procedure forms a test pattern (yellow grid on blue background). | |
511 | * | |
512 | * Parameters: | |
513 | * fullframe: if TRUE then entire frame is filled, otherwise the procedure | |
514 | * continues from the current scanline. | |
515 | * pmode 0: fill the frame with solid blue color (like on VCR or TV) | |
516 | * 1: Draw a colored grid | |
517 | * | |
518 | * History: | |
519 | * 01-Feb-2000 Created. | |
520 | */ | |
521 | void usbvideo_TestPattern(struct uvd *uvd, int fullframe, int pmode) | |
522 | { | |
523 | struct usbvideo_frame *frame; | |
524 | int num_cell = 0; | |
525 | int scan_length = 0; | |
526 | static int num_pass = 0; | |
527 | ||
528 | if (uvd == NULL) { | |
529 | err("%s: uvd == NULL", __FUNCTION__); | |
530 | return; | |
531 | } | |
532 | if ((uvd->curframe < 0) || (uvd->curframe >= USBVIDEO_NUMFRAMES)) { | |
533 | err("%s: uvd->curframe=%d.", __FUNCTION__, uvd->curframe); | |
534 | return; | |
535 | } | |
536 | ||
537 | /* Grab the current frame */ | |
538 | frame = &uvd->frame[uvd->curframe]; | |
539 | ||
540 | /* Optionally start at the beginning */ | |
541 | if (fullframe) { | |
542 | frame->curline = 0; | |
543 | frame->seqRead_Length = 0; | |
544 | } | |
545 | #if 0 | |
546 | { /* For debugging purposes only */ | |
547 | char tmp[20]; | |
548 | usbvideo_VideosizeToString(tmp, sizeof(tmp), frame->request); | |
549 | info("testpattern: frame=%s", tmp); | |
550 | } | |
551 | #endif | |
552 | /* Form every scan line */ | |
553 | for (; frame->curline < VIDEOSIZE_Y(frame->request); frame->curline++) { | |
554 | int i; | |
555 | unsigned char *f = frame->data + | |
556 | (VIDEOSIZE_X(frame->request) * V4L_BYTES_PER_PIXEL * frame->curline); | |
557 | for (i=0; i < VIDEOSIZE_X(frame->request); i++) { | |
558 | unsigned char cb=0x80; | |
559 | unsigned char cg = 0; | |
560 | unsigned char cr = 0; | |
561 | ||
562 | if (pmode == 1) { | |
563 | if (frame->curline % 32 == 0) | |
564 | cb = 0, cg = cr = 0xFF; | |
565 | else if (i % 32 == 0) { | |
566 | if (frame->curline % 32 == 1) | |
567 | num_cell++; | |
568 | cb = 0, cg = cr = 0xFF; | |
569 | } else { | |
570 | cb = ((num_cell*7) + num_pass) & 0xFF; | |
571 | cg = ((num_cell*5) + num_pass*2) & 0xFF; | |
572 | cr = ((num_cell*3) + num_pass*3) & 0xFF; | |
573 | } | |
574 | } else { | |
575 | /* Just the blue screen */ | |
576 | } | |
d56410e0 | 577 | |
1da177e4 LT |
578 | *f++ = cb; |
579 | *f++ = cg; | |
580 | *f++ = cr; | |
581 | scan_length += 3; | |
582 | } | |
583 | } | |
584 | ||
585 | frame->frameState = FrameState_Done; | |
586 | frame->seqRead_Length += scan_length; | |
587 | ++num_pass; | |
588 | ||
589 | /* We do this unconditionally, regardless of FLAGS_OVERLAY_STATS */ | |
590 | usbvideo_OverlayStats(uvd, frame); | |
591 | } | |
592 | ||
593 | EXPORT_SYMBOL(usbvideo_TestPattern); | |
594 | ||
595 | ||
596 | #ifdef DEBUG | |
597 | /* | |
598 | * usbvideo_HexDump() | |
599 | * | |
600 | * A debugging tool. Prints hex dumps. | |
601 | * | |
602 | * History: | |
603 | * 29-Jul-2000 Added printing of offsets. | |
604 | */ | |
605 | void usbvideo_HexDump(const unsigned char *data, int len) | |
606 | { | |
607 | const int bytes_per_line = 32; | |
608 | char tmp[128]; /* 32*3 + 5 */ | |
609 | int i, k; | |
610 | ||
611 | for (i=k=0; len > 0; i++, len--) { | |
612 | if (i > 0 && ((i % bytes_per_line) == 0)) { | |
613 | printk("%s\n", tmp); | |
614 | k=0; | |
615 | } | |
616 | if ((i % bytes_per_line) == 0) | |
617 | k += sprintf(&tmp[k], "%04x: ", i); | |
618 | k += sprintf(&tmp[k], "%02x ", data[i]); | |
619 | } | |
620 | if (k > 0) | |
621 | printk("%s\n", tmp); | |
622 | } | |
623 | ||
624 | EXPORT_SYMBOL(usbvideo_HexDump); | |
625 | ||
626 | #endif | |
627 | ||
628 | /* ******************************************************************** */ | |
629 | ||
630 | /* XXX: this piece of crap really wants some error handling.. */ | |
631 | static void usbvideo_ClientIncModCount(struct uvd *uvd) | |
632 | { | |
633 | if (uvd == NULL) { | |
634 | err("%s: uvd == NULL", __FUNCTION__); | |
635 | return; | |
636 | } | |
637 | if (uvd->handle == NULL) { | |
638 | err("%s: uvd->handle == NULL", __FUNCTION__); | |
639 | return; | |
640 | } | |
641 | if (uvd->handle->md_module == NULL) { | |
642 | err("%s: uvd->handle->md_module == NULL", __FUNCTION__); | |
643 | return; | |
644 | } | |
645 | if (!try_module_get(uvd->handle->md_module)) { | |
646 | err("%s: try_module_get() == 0", __FUNCTION__); | |
647 | return; | |
648 | } | |
649 | } | |
650 | ||
651 | static void usbvideo_ClientDecModCount(struct uvd *uvd) | |
652 | { | |
653 | if (uvd == NULL) { | |
654 | err("%s: uvd == NULL", __FUNCTION__); | |
655 | return; | |
656 | } | |
657 | if (uvd->handle == NULL) { | |
658 | err("%s: uvd->handle == NULL", __FUNCTION__); | |
659 | return; | |
660 | } | |
661 | if (uvd->handle->md_module == NULL) { | |
662 | err("%s: uvd->handle->md_module == NULL", __FUNCTION__); | |
663 | return; | |
664 | } | |
665 | module_put(uvd->handle->md_module); | |
666 | } | |
667 | ||
668 | int usbvideo_register( | |
669 | struct usbvideo **pCams, | |
670 | const int num_cams, | |
671 | const int num_extra, | |
672 | const char *driverName, | |
673 | const struct usbvideo_cb *cbTbl, | |
674 | struct module *md, | |
675 | const struct usb_device_id *id_table) | |
676 | { | |
677 | struct usbvideo *cams; | |
678 | int i, base_size, result; | |
679 | ||
680 | /* Check parameters for sanity */ | |
681 | if ((num_cams <= 0) || (pCams == NULL) || (cbTbl == NULL)) { | |
682 | err("%s: Illegal call", __FUNCTION__); | |
683 | return -EINVAL; | |
684 | } | |
685 | ||
686 | /* Check registration callback - must be set! */ | |
687 | if (cbTbl->probe == NULL) { | |
688 | err("%s: probe() is required!", __FUNCTION__); | |
689 | return -EINVAL; | |
690 | } | |
691 | ||
692 | base_size = num_cams * sizeof(struct uvd) + sizeof(struct usbvideo); | |
51b208dd | 693 | cams = (struct usbvideo *) kzalloc(base_size, GFP_KERNEL); |
1da177e4 LT |
694 | if (cams == NULL) { |
695 | err("Failed to allocate %d. bytes for usbvideo struct", base_size); | |
696 | return -ENOMEM; | |
697 | } | |
698 | dbg("%s: Allocated $%p (%d. bytes) for %d. cameras", | |
699 | __FUNCTION__, cams, base_size, num_cams); | |
1da177e4 LT |
700 | |
701 | /* Copy callbacks, apply defaults for those that are not set */ | |
702 | memmove(&cams->cb, cbTbl, sizeof(cams->cb)); | |
703 | if (cams->cb.getFrame == NULL) | |
704 | cams->cb.getFrame = usbvideo_GetFrame; | |
705 | if (cams->cb.disconnect == NULL) | |
706 | cams->cb.disconnect = usbvideo_Disconnect; | |
707 | if (cams->cb.startDataPump == NULL) | |
708 | cams->cb.startDataPump = usbvideo_StartDataPump; | |
709 | if (cams->cb.stopDataPump == NULL) | |
710 | cams->cb.stopDataPump = usbvideo_StopDataPump; | |
711 | ||
712 | cams->num_cameras = num_cams; | |
713 | cams->cam = (struct uvd *) &cams[1]; | |
714 | cams->md_module = md; | |
715 | if (cams->md_module == NULL) | |
716 | warn("%s: module == NULL!", __FUNCTION__); | |
4186ecf8 | 717 | mutex_init(&cams->lock); /* to 1 == available */ |
1da177e4 LT |
718 | |
719 | for (i = 0; i < num_cams; i++) { | |
720 | struct uvd *up = &cams->cam[i]; | |
721 | ||
722 | up->handle = cams; | |
723 | ||
724 | /* Allocate user_data separately because of kmalloc's limits */ | |
725 | if (num_extra > 0) { | |
726 | up->user_size = num_cams * num_extra; | |
0e8eb0f0 | 727 | up->user_data = kmalloc(up->user_size, GFP_KERNEL); |
1da177e4 LT |
728 | if (up->user_data == NULL) { |
729 | err("%s: Failed to allocate user_data (%d. bytes)", | |
730 | __FUNCTION__, up->user_size); | |
731 | while (i) { | |
732 | up = &cams->cam[--i]; | |
733 | kfree(up->user_data); | |
734 | } | |
735 | kfree(cams); | |
736 | return -ENOMEM; | |
737 | } | |
738 | dbg("%s: Allocated cams[%d].user_data=$%p (%d. bytes)", | |
739 | __FUNCTION__, i, up->user_data, up->user_size); | |
740 | } | |
741 | } | |
742 | ||
743 | /* | |
744 | * Register ourselves with USB stack. | |
745 | */ | |
746 | strcpy(cams->drvName, (driverName != NULL) ? driverName : "Unknown"); | |
747 | cams->usbdrv.name = cams->drvName; | |
748 | cams->usbdrv.probe = cams->cb.probe; | |
749 | cams->usbdrv.disconnect = cams->cb.disconnect; | |
750 | cams->usbdrv.id_table = id_table; | |
751 | ||
752 | /* | |
753 | * Update global handle to usbvideo. This is very important | |
754 | * because probe() can be called before usb_register() returns. | |
755 | * If the handle is not yet updated then the probe() will fail. | |
756 | */ | |
757 | *pCams = cams; | |
758 | result = usb_register(&cams->usbdrv); | |
759 | if (result) { | |
760 | for (i = 0; i < num_cams; i++) { | |
761 | struct uvd *up = &cams->cam[i]; | |
762 | kfree(up->user_data); | |
763 | } | |
764 | kfree(cams); | |
765 | } | |
766 | ||
767 | return result; | |
768 | } | |
769 | ||
770 | EXPORT_SYMBOL(usbvideo_register); | |
771 | ||
772 | /* | |
773 | * usbvideo_Deregister() | |
774 | * | |
775 | * Procedure frees all usbvideo and user data structures. Be warned that | |
776 | * if you had some dynamically allocated components in ->user field then | |
777 | * you should free them before calling here. | |
778 | */ | |
779 | void usbvideo_Deregister(struct usbvideo **pCams) | |
780 | { | |
781 | struct usbvideo *cams; | |
782 | int i; | |
783 | ||
784 | if (pCams == NULL) { | |
785 | err("%s: pCams == NULL", __FUNCTION__); | |
786 | return; | |
787 | } | |
788 | cams = *pCams; | |
789 | if (cams == NULL) { | |
790 | err("%s: cams == NULL", __FUNCTION__); | |
791 | return; | |
792 | } | |
793 | ||
794 | dbg("%s: Deregistering %s driver.", __FUNCTION__, cams->drvName); | |
795 | usb_deregister(&cams->usbdrv); | |
796 | ||
797 | dbg("%s: Deallocating cams=$%p (%d. cameras)", __FUNCTION__, cams, cams->num_cameras); | |
798 | for (i=0; i < cams->num_cameras; i++) { | |
799 | struct uvd *up = &cams->cam[i]; | |
800 | int warning = 0; | |
801 | ||
802 | if (up->user_data != NULL) { | |
803 | if (up->user_size <= 0) | |
804 | ++warning; | |
805 | } else { | |
806 | if (up->user_size > 0) | |
807 | ++warning; | |
808 | } | |
809 | if (warning) { | |
810 | err("%s: Warning: user_data=$%p user_size=%d.", | |
811 | __FUNCTION__, up->user_data, up->user_size); | |
812 | } else { | |
813 | dbg("%s: Freeing %d. $%p->user_data=$%p", | |
814 | __FUNCTION__, i, up, up->user_data); | |
815 | kfree(up->user_data); | |
816 | } | |
817 | } | |
818 | /* Whole array was allocated in one chunk */ | |
819 | dbg("%s: Freed %d uvd structures", | |
820 | __FUNCTION__, cams->num_cameras); | |
821 | kfree(cams); | |
822 | *pCams = NULL; | |
823 | } | |
824 | ||
825 | EXPORT_SYMBOL(usbvideo_Deregister); | |
826 | ||
827 | /* | |
828 | * usbvideo_Disconnect() | |
829 | * | |
830 | * This procedure stops all driver activity. Deallocation of | |
831 | * the interface-private structure (pointed by 'ptr') is done now | |
832 | * (if we don't have any open files) or later, when those files | |
833 | * are closed. After that driver should be removable. | |
834 | * | |
835 | * This code handles surprise removal. The uvd->user is a counter which | |
836 | * increments on open() and decrements on close(). If we see here that | |
837 | * this counter is not 0 then we have a client who still has us opened. | |
838 | * We set uvd->remove_pending flag as early as possible, and after that | |
839 | * all access to the camera will gracefully fail. These failures should | |
840 | * prompt client to (eventually) close the video device, and then - in | |
841 | * usbvideo_v4l_close() - we decrement uvd->uvd_used and usage counter. | |
842 | * | |
843 | * History: | |
844 | * 22-Jan-2000 Added polling of MOD_IN_USE to delay removal until all users gone. | |
845 | * 27-Jan-2000 Reworked to allow pending disconnects; see xxx_close() | |
846 | * 24-May-2000 Corrected to prevent race condition (MOD_xxx_USE_COUNT). | |
847 | * 19-Oct-2000 Moved to usbvideo module. | |
848 | */ | |
849 | static void usbvideo_Disconnect(struct usb_interface *intf) | |
850 | { | |
851 | struct uvd *uvd = usb_get_intfdata (intf); | |
852 | int i; | |
853 | ||
854 | if (uvd == NULL) { | |
855 | err("%s($%p): Illegal call.", __FUNCTION__, intf); | |
856 | return; | |
857 | } | |
858 | ||
859 | usb_set_intfdata (intf, NULL); | |
860 | ||
861 | usbvideo_ClientIncModCount(uvd); | |
862 | if (uvd->debug > 0) | |
863 | info("%s(%p.)", __FUNCTION__, intf); | |
864 | ||
4186ecf8 | 865 | mutex_lock(&uvd->lock); |
1da177e4 LT |
866 | uvd->remove_pending = 1; /* Now all ISO data will be ignored */ |
867 | ||
868 | /* At this time we ask to cancel outstanding URBs */ | |
869 | GET_CALLBACK(uvd, stopDataPump)(uvd); | |
870 | ||
871 | for (i=0; i < USBVIDEO_NUMSBUF; i++) | |
872 | usb_free_urb(uvd->sbuf[i].urb); | |
873 | ||
874 | usb_put_dev(uvd->dev); | |
875 | uvd->dev = NULL; /* USB device is no more */ | |
876 | ||
877 | video_unregister_device(&uvd->vdev); | |
878 | if (uvd->debug > 0) | |
879 | info("%s: Video unregistered.", __FUNCTION__); | |
880 | ||
881 | if (uvd->user) | |
882 | info("%s: In use, disconnect pending.", __FUNCTION__); | |
883 | else | |
884 | usbvideo_CameraRelease(uvd); | |
4186ecf8 | 885 | mutex_unlock(&uvd->lock); |
1da177e4 LT |
886 | info("USB camera disconnected."); |
887 | ||
888 | usbvideo_ClientDecModCount(uvd); | |
889 | } | |
890 | ||
891 | /* | |
892 | * usbvideo_CameraRelease() | |
893 | * | |
894 | * This code does final release of uvd. This happens | |
895 | * after the device is disconnected -and- all clients | |
896 | * closed their files. | |
897 | * | |
898 | * History: | |
899 | * 27-Jan-2000 Created. | |
900 | */ | |
901 | static void usbvideo_CameraRelease(struct uvd *uvd) | |
902 | { | |
903 | if (uvd == NULL) { | |
904 | err("%s: Illegal call", __FUNCTION__); | |
905 | return; | |
906 | } | |
907 | ||
908 | RingQueue_Free(&uvd->dp); | |
909 | if (VALID_CALLBACK(uvd, userFree)) | |
910 | GET_CALLBACK(uvd, userFree)(uvd); | |
911 | uvd->uvd_used = 0; /* This is atomic, no need to take mutex */ | |
912 | } | |
913 | ||
914 | /* | |
915 | * usbvideo_find_struct() | |
916 | * | |
917 | * This code searches the array of preallocated (static) structures | |
918 | * and returns index of the first one that isn't in use. Returns -1 | |
919 | * if there are no free structures. | |
920 | * | |
921 | * History: | |
922 | * 27-Jan-2000 Created. | |
923 | */ | |
924 | static int usbvideo_find_struct(struct usbvideo *cams) | |
925 | { | |
926 | int u, rv = -1; | |
927 | ||
928 | if (cams == NULL) { | |
929 | err("No usbvideo handle?"); | |
930 | return -1; | |
931 | } | |
4186ecf8 | 932 | mutex_lock(&cams->lock); |
1da177e4 LT |
933 | for (u = 0; u < cams->num_cameras; u++) { |
934 | struct uvd *uvd = &cams->cam[u]; | |
935 | if (!uvd->uvd_used) /* This one is free */ | |
936 | { | |
937 | uvd->uvd_used = 1; /* In use now */ | |
4186ecf8 | 938 | mutex_init(&uvd->lock); /* to 1 == available */ |
1da177e4 LT |
939 | uvd->dev = NULL; |
940 | rv = u; | |
941 | break; | |
942 | } | |
943 | } | |
4186ecf8 | 944 | mutex_unlock(&cams->lock); |
1da177e4 LT |
945 | return rv; |
946 | } | |
947 | ||
948 | static struct file_operations usbvideo_fops = { | |
949 | .owner = THIS_MODULE, | |
950 | .open = usbvideo_v4l_open, | |
951 | .release =usbvideo_v4l_close, | |
952 | .read = usbvideo_v4l_read, | |
953 | .mmap = usbvideo_v4l_mmap, | |
954 | .ioctl = usbvideo_v4l_ioctl, | |
0d0fbf81 | 955 | .compat_ioctl = v4l_compat_ioctl32, |
1da177e4 LT |
956 | .llseek = no_llseek, |
957 | }; | |
4c4c9432 | 958 | static const struct video_device usbvideo_template = { |
1da177e4 LT |
959 | .owner = THIS_MODULE, |
960 | .type = VID_TYPE_CAPTURE, | |
961 | .hardware = VID_HARDWARE_CPIA, | |
962 | .fops = &usbvideo_fops, | |
963 | }; | |
964 | ||
965 | struct uvd *usbvideo_AllocateDevice(struct usbvideo *cams) | |
966 | { | |
967 | int i, devnum; | |
968 | struct uvd *uvd = NULL; | |
969 | ||
970 | if (cams == NULL) { | |
971 | err("No usbvideo handle?"); | |
972 | return NULL; | |
973 | } | |
974 | ||
975 | devnum = usbvideo_find_struct(cams); | |
976 | if (devnum == -1) { | |
977 | err("IBM USB camera driver: Too many devices!"); | |
978 | return NULL; | |
979 | } | |
980 | uvd = &cams->cam[devnum]; | |
981 | dbg("Device entry #%d. at $%p", devnum, uvd); | |
982 | ||
983 | /* Not relying upon caller we increase module counter ourselves */ | |
984 | usbvideo_ClientIncModCount(uvd); | |
985 | ||
4186ecf8 | 986 | mutex_lock(&uvd->lock); |
1da177e4 LT |
987 | for (i=0; i < USBVIDEO_NUMSBUF; i++) { |
988 | uvd->sbuf[i].urb = usb_alloc_urb(FRAMES_PER_DESC, GFP_KERNEL); | |
989 | if (uvd->sbuf[i].urb == NULL) { | |
990 | err("usb_alloc_urb(%d.) failed.", FRAMES_PER_DESC); | |
991 | uvd->uvd_used = 0; | |
992 | uvd = NULL; | |
993 | goto allocate_done; | |
994 | } | |
995 | } | |
996 | uvd->user=0; | |
997 | uvd->remove_pending = 0; | |
998 | uvd->last_error = 0; | |
999 | RingQueue_Initialize(&uvd->dp); | |
1000 | ||
1001 | /* Initialize video device structure */ | |
1002 | uvd->vdev = usbvideo_template; | |
1003 | sprintf(uvd->vdev.name, "%.20s USB Camera", cams->drvName); | |
1004 | /* | |
1005 | * The client is free to overwrite those because we | |
1006 | * return control to the client's probe function right now. | |
1007 | */ | |
1008 | allocate_done: | |
4186ecf8 | 1009 | mutex_unlock(&uvd->lock); |
1da177e4 LT |
1010 | usbvideo_ClientDecModCount(uvd); |
1011 | return uvd; | |
1012 | } | |
1013 | ||
1014 | EXPORT_SYMBOL(usbvideo_AllocateDevice); | |
1015 | ||
1016 | int usbvideo_RegisterVideoDevice(struct uvd *uvd) | |
1017 | { | |
1018 | char tmp1[20], tmp2[20]; /* Buffers for printing */ | |
1019 | ||
1020 | if (uvd == NULL) { | |
1021 | err("%s: Illegal call.", __FUNCTION__); | |
1022 | return -EINVAL; | |
1023 | } | |
1024 | if (uvd->video_endp == 0) { | |
1025 | info("%s: No video endpoint specified; data pump disabled.", __FUNCTION__); | |
1026 | } | |
1027 | if (uvd->paletteBits == 0) { | |
1028 | err("%s: No palettes specified!", __FUNCTION__); | |
1029 | return -EINVAL; | |
1030 | } | |
1031 | if (uvd->defaultPalette == 0) { | |
1032 | info("%s: No default palette!", __FUNCTION__); | |
1033 | } | |
1034 | ||
1035 | uvd->max_frame_size = VIDEOSIZE_X(uvd->canvas) * | |
1036 | VIDEOSIZE_Y(uvd->canvas) * V4L_BYTES_PER_PIXEL; | |
1037 | usbvideo_VideosizeToString(tmp1, sizeof(tmp1), uvd->videosize); | |
1038 | usbvideo_VideosizeToString(tmp2, sizeof(tmp2), uvd->canvas); | |
1039 | ||
1040 | if (uvd->debug > 0) { | |
1041 | info("%s: iface=%d. endpoint=$%02x paletteBits=$%08lx", | |
1042 | __FUNCTION__, uvd->iface, uvd->video_endp, uvd->paletteBits); | |
1043 | } | |
1044 | if (video_register_device(&uvd->vdev, VFL_TYPE_GRABBER, video_nr) == -1) { | |
1045 | err("%s: video_register_device failed", __FUNCTION__); | |
1046 | return -EPIPE; | |
1047 | } | |
1048 | if (uvd->debug > 1) { | |
1049 | info("%s: video_register_device() successful", __FUNCTION__); | |
1050 | } | |
1051 | if (uvd->dev == NULL) { | |
1052 | err("%s: uvd->dev == NULL", __FUNCTION__); | |
1053 | return -EINVAL; | |
1054 | } | |
1055 | ||
1056 | info("%s on /dev/video%d: canvas=%s videosize=%s", | |
1057 | (uvd->handle != NULL) ? uvd->handle->drvName : "???", | |
1058 | uvd->vdev.minor, tmp2, tmp1); | |
1059 | ||
1060 | usb_get_dev(uvd->dev); | |
1061 | return 0; | |
1062 | } | |
1063 | ||
1064 | EXPORT_SYMBOL(usbvideo_RegisterVideoDevice); | |
1065 | ||
1066 | /* ******************************************************************** */ | |
1067 | ||
1068 | static int usbvideo_v4l_mmap(struct file *file, struct vm_area_struct *vma) | |
1069 | { | |
1070 | struct uvd *uvd = file->private_data; | |
1071 | unsigned long start = vma->vm_start; | |
1072 | unsigned long size = vma->vm_end-vma->vm_start; | |
1073 | unsigned long page, pos; | |
1074 | ||
1075 | if (!CAMERA_IS_OPERATIONAL(uvd)) | |
1076 | return -EFAULT; | |
1077 | ||
1078 | if (size > (((USBVIDEO_NUMFRAMES * uvd->max_frame_size) + PAGE_SIZE - 1) & ~(PAGE_SIZE - 1))) | |
1079 | return -EINVAL; | |
1080 | ||
1081 | pos = (unsigned long) uvd->fbuf; | |
1082 | while (size > 0) { | |
1083 | page = vmalloc_to_pfn((void *)pos); | |
1084 | if (remap_pfn_range(vma, start, page, PAGE_SIZE, PAGE_SHARED)) | |
1085 | return -EAGAIN; | |
1086 | ||
1087 | start += PAGE_SIZE; | |
1088 | pos += PAGE_SIZE; | |
1089 | if (size > PAGE_SIZE) | |
1090 | size -= PAGE_SIZE; | |
1091 | else | |
1092 | size = 0; | |
1093 | } | |
1094 | ||
1095 | return 0; | |
1096 | } | |
1097 | ||
1098 | /* | |
1099 | * usbvideo_v4l_open() | |
1100 | * | |
1101 | * This is part of Video 4 Linux API. The driver can be opened by one | |
1102 | * client only (checks internal counter 'uvdser'). The procedure | |
1103 | * then allocates buffers needed for video processing. | |
1104 | * | |
1105 | * History: | |
1106 | * 22-Jan-2000 Rewrote, moved scratch buffer allocation here. Now the | |
1107 | * camera is also initialized here (once per connect), at | |
1108 | * expense of V4L client (it waits on open() call). | |
1109 | * 27-Jan-2000 Used USBVIDEO_NUMSBUF as number of URB buffers. | |
1110 | * 24-May-2000 Corrected to prevent race condition (MOD_xxx_USE_COUNT). | |
1111 | */ | |
1112 | static int usbvideo_v4l_open(struct inode *inode, struct file *file) | |
1113 | { | |
1114 | struct video_device *dev = video_devdata(file); | |
1115 | struct uvd *uvd = (struct uvd *) dev; | |
1116 | const int sb_size = FRAMES_PER_DESC * uvd->iso_packet_len; | |
1117 | int i, errCode = 0; | |
1118 | ||
1119 | if (uvd->debug > 1) | |
1120 | info("%s($%p)", __FUNCTION__, dev); | |
1121 | ||
1122 | usbvideo_ClientIncModCount(uvd); | |
4186ecf8 | 1123 | mutex_lock(&uvd->lock); |
1da177e4 LT |
1124 | |
1125 | if (uvd->user) { | |
1126 | err("%s: Someone tried to open an already opened device!", __FUNCTION__); | |
1127 | errCode = -EBUSY; | |
1128 | } else { | |
1129 | /* Clear statistics */ | |
1130 | memset(&uvd->stats, 0, sizeof(uvd->stats)); | |
1131 | ||
1132 | /* Clean pointers so we know if we allocated something */ | |
1133 | for (i=0; i < USBVIDEO_NUMSBUF; i++) | |
1134 | uvd->sbuf[i].data = NULL; | |
1135 | ||
1136 | /* Allocate memory for the frame buffers */ | |
1137 | uvd->fbuf_size = USBVIDEO_NUMFRAMES * uvd->max_frame_size; | |
1138 | uvd->fbuf = usbvideo_rvmalloc(uvd->fbuf_size); | |
1139 | RingQueue_Allocate(&uvd->dp, RING_QUEUE_SIZE); | |
1140 | if ((uvd->fbuf == NULL) || | |
1141 | (!RingQueue_IsAllocated(&uvd->dp))) { | |
1142 | err("%s: Failed to allocate fbuf or dp", __FUNCTION__); | |
1143 | errCode = -ENOMEM; | |
1144 | } else { | |
1145 | /* Allocate all buffers */ | |
1146 | for (i=0; i < USBVIDEO_NUMFRAMES; i++) { | |
1147 | uvd->frame[i].frameState = FrameState_Unused; | |
1148 | uvd->frame[i].data = uvd->fbuf + i*(uvd->max_frame_size); | |
1149 | /* | |
1150 | * Set default sizes in case IOCTL (VIDIOCMCAPTURE) | |
1151 | * is not used (using read() instead). | |
1152 | */ | |
1153 | uvd->frame[i].canvas = uvd->canvas; | |
1154 | uvd->frame[i].seqRead_Index = 0; | |
1155 | } | |
1156 | for (i=0; i < USBVIDEO_NUMSBUF; i++) { | |
1157 | uvd->sbuf[i].data = kmalloc(sb_size, GFP_KERNEL); | |
1158 | if (uvd->sbuf[i].data == NULL) { | |
1159 | errCode = -ENOMEM; | |
1160 | break; | |
1161 | } | |
1162 | } | |
1163 | } | |
1164 | if (errCode != 0) { | |
1165 | /* Have to free all that memory */ | |
1166 | if (uvd->fbuf != NULL) { | |
1167 | usbvideo_rvfree(uvd->fbuf, uvd->fbuf_size); | |
1168 | uvd->fbuf = NULL; | |
1169 | } | |
1170 | RingQueue_Free(&uvd->dp); | |
1171 | for (i=0; i < USBVIDEO_NUMSBUF; i++) { | |
1bc3c9e1 JJ |
1172 | kfree(uvd->sbuf[i].data); |
1173 | uvd->sbuf[i].data = NULL; | |
1da177e4 LT |
1174 | } |
1175 | } | |
1176 | } | |
1177 | ||
1178 | /* If so far no errors then we shall start the camera */ | |
1179 | if (errCode == 0) { | |
1180 | /* Start data pump if we have valid endpoint */ | |
1181 | if (uvd->video_endp != 0) | |
1182 | errCode = GET_CALLBACK(uvd, startDataPump)(uvd); | |
1183 | if (errCode == 0) { | |
1184 | if (VALID_CALLBACK(uvd, setupOnOpen)) { | |
1185 | if (uvd->debug > 1) | |
1186 | info("%s: setupOnOpen callback", __FUNCTION__); | |
1187 | errCode = GET_CALLBACK(uvd, setupOnOpen)(uvd); | |
1188 | if (errCode < 0) { | |
1189 | err("%s: setupOnOpen callback failed (%d.).", | |
1190 | __FUNCTION__, errCode); | |
1191 | } else if (uvd->debug > 1) { | |
1192 | info("%s: setupOnOpen callback successful", __FUNCTION__); | |
1193 | } | |
1194 | } | |
1195 | if (errCode == 0) { | |
1196 | uvd->settingsAdjusted = 0; | |
1197 | if (uvd->debug > 1) | |
1198 | info("%s: Open succeeded.", __FUNCTION__); | |
1199 | uvd->user++; | |
1200 | file->private_data = uvd; | |
1201 | } | |
1202 | } | |
1203 | } | |
4186ecf8 | 1204 | mutex_unlock(&uvd->lock); |
1da177e4 LT |
1205 | if (errCode != 0) |
1206 | usbvideo_ClientDecModCount(uvd); | |
1207 | if (uvd->debug > 0) | |
1208 | info("%s: Returning %d.", __FUNCTION__, errCode); | |
1209 | return errCode; | |
1210 | } | |
1211 | ||
1212 | /* | |
1213 | * usbvideo_v4l_close() | |
1214 | * | |
1215 | * This is part of Video 4 Linux API. The procedure | |
1216 | * stops streaming and deallocates all buffers that were earlier | |
1217 | * allocated in usbvideo_v4l_open(). | |
1218 | * | |
1219 | * History: | |
1220 | * 22-Jan-2000 Moved scratch buffer deallocation here. | |
1221 | * 27-Jan-2000 Used USBVIDEO_NUMSBUF as number of URB buffers. | |
1222 | * 24-May-2000 Moved MOD_DEC_USE_COUNT outside of code that can sleep. | |
1223 | */ | |
1224 | static int usbvideo_v4l_close(struct inode *inode, struct file *file) | |
1225 | { | |
1226 | struct video_device *dev = file->private_data; | |
1227 | struct uvd *uvd = (struct uvd *) dev; | |
1228 | int i; | |
1229 | ||
1230 | if (uvd->debug > 1) | |
1231 | info("%s($%p)", __FUNCTION__, dev); | |
1232 | ||
4186ecf8 | 1233 | mutex_lock(&uvd->lock); |
1da177e4 LT |
1234 | GET_CALLBACK(uvd, stopDataPump)(uvd); |
1235 | usbvideo_rvfree(uvd->fbuf, uvd->fbuf_size); | |
1236 | uvd->fbuf = NULL; | |
1237 | RingQueue_Free(&uvd->dp); | |
1238 | ||
1239 | for (i=0; i < USBVIDEO_NUMSBUF; i++) { | |
1240 | kfree(uvd->sbuf[i].data); | |
1241 | uvd->sbuf[i].data = NULL; | |
1242 | } | |
1243 | ||
1244 | #if USBVIDEO_REPORT_STATS | |
1245 | usbvideo_ReportStatistics(uvd); | |
d56410e0 | 1246 | #endif |
1da177e4 LT |
1247 | |
1248 | uvd->user--; | |
1249 | if (uvd->remove_pending) { | |
1250 | if (uvd->debug > 0) | |
1251 | info("usbvideo_v4l_close: Final disconnect."); | |
1252 | usbvideo_CameraRelease(uvd); | |
1253 | } | |
4186ecf8 | 1254 | mutex_unlock(&uvd->lock); |
1da177e4 LT |
1255 | usbvideo_ClientDecModCount(uvd); |
1256 | ||
1257 | if (uvd->debug > 1) | |
1258 | info("%s: Completed.", __FUNCTION__); | |
1259 | file->private_data = NULL; | |
1260 | return 0; | |
1261 | } | |
1262 | ||
1263 | /* | |
1264 | * usbvideo_v4l_ioctl() | |
1265 | * | |
1266 | * This is part of Video 4 Linux API. The procedure handles ioctl() calls. | |
1267 | * | |
1268 | * History: | |
1269 | * 22-Jan-2000 Corrected VIDIOCSPICT to reject unsupported settings. | |
1270 | */ | |
1271 | static int usbvideo_v4l_do_ioctl(struct inode *inode, struct file *file, | |
1272 | unsigned int cmd, void *arg) | |
1273 | { | |
1274 | struct uvd *uvd = file->private_data; | |
1275 | ||
1276 | if (!CAMERA_IS_OPERATIONAL(uvd)) | |
1277 | return -EIO; | |
1278 | ||
1279 | switch (cmd) { | |
1280 | case VIDIOCGCAP: | |
1281 | { | |
1282 | struct video_capability *b = arg; | |
1283 | *b = uvd->vcap; | |
1284 | return 0; | |
1285 | } | |
1286 | case VIDIOCGCHAN: | |
1287 | { | |
1288 | struct video_channel *v = arg; | |
1289 | *v = uvd->vchan; | |
1290 | return 0; | |
1291 | } | |
1292 | case VIDIOCSCHAN: | |
d56410e0 | 1293 | { |
1da177e4 LT |
1294 | struct video_channel *v = arg; |
1295 | if (v->channel != 0) | |
1296 | return -EINVAL; | |
1297 | return 0; | |
1298 | } | |
1299 | case VIDIOCGPICT: | |
1300 | { | |
1301 | struct video_picture *pic = arg; | |
1302 | *pic = uvd->vpic; | |
1303 | return 0; | |
1304 | } | |
1305 | case VIDIOCSPICT: | |
1306 | { | |
1307 | struct video_picture *pic = arg; | |
1308 | /* | |
1309 | * Use temporary 'video_picture' structure to preserve our | |
1310 | * own settings (such as color depth, palette) that we | |
1311 | * aren't allowing everyone (V4L client) to change. | |
1312 | */ | |
1313 | uvd->vpic.brightness = pic->brightness; | |
1314 | uvd->vpic.hue = pic->hue; | |
1315 | uvd->vpic.colour = pic->colour; | |
1316 | uvd->vpic.contrast = pic->contrast; | |
1317 | uvd->settingsAdjusted = 0; /* Will force new settings */ | |
1318 | return 0; | |
1319 | } | |
1320 | case VIDIOCSWIN: | |
1321 | { | |
1322 | struct video_window *vw = arg; | |
1323 | ||
1324 | if(VALID_CALLBACK(uvd, setVideoMode)) { | |
1325 | return GET_CALLBACK(uvd, setVideoMode)(uvd, vw); | |
1326 | } | |
1327 | ||
1328 | if (vw->flags) | |
1329 | return -EINVAL; | |
1330 | if (vw->clipcount) | |
1331 | return -EINVAL; | |
1332 | if (vw->width != VIDEOSIZE_X(uvd->canvas)) | |
1333 | return -EINVAL; | |
1334 | if (vw->height != VIDEOSIZE_Y(uvd->canvas)) | |
1335 | return -EINVAL; | |
1336 | ||
1337 | return 0; | |
1338 | } | |
1339 | case VIDIOCGWIN: | |
1340 | { | |
1341 | struct video_window *vw = arg; | |
1342 | ||
1343 | vw->x = 0; | |
1344 | vw->y = 0; | |
1345 | vw->width = VIDEOSIZE_X(uvd->videosize); | |
1346 | vw->height = VIDEOSIZE_Y(uvd->videosize); | |
1347 | vw->chromakey = 0; | |
1348 | if (VALID_CALLBACK(uvd, getFPS)) | |
1349 | vw->flags = GET_CALLBACK(uvd, getFPS)(uvd); | |
d56410e0 | 1350 | else |
1da177e4 LT |
1351 | vw->flags = 10; /* FIXME: do better! */ |
1352 | return 0; | |
1353 | } | |
1354 | case VIDIOCGMBUF: | |
1355 | { | |
1356 | struct video_mbuf *vm = arg; | |
1357 | int i; | |
1358 | ||
1359 | memset(vm, 0, sizeof(*vm)); | |
1360 | vm->size = uvd->max_frame_size * USBVIDEO_NUMFRAMES; | |
1361 | vm->frames = USBVIDEO_NUMFRAMES; | |
d56410e0 | 1362 | for(i = 0; i < USBVIDEO_NUMFRAMES; i++) |
1da177e4 LT |
1363 | vm->offsets[i] = i * uvd->max_frame_size; |
1364 | ||
1365 | return 0; | |
1366 | } | |
1367 | case VIDIOCMCAPTURE: | |
1368 | { | |
1369 | struct video_mmap *vm = arg; | |
1370 | ||
1371 | if (uvd->debug >= 1) { | |
1372 | info("VIDIOCMCAPTURE: frame=%d. size=%dx%d, format=%d.", | |
1373 | vm->frame, vm->width, vm->height, vm->format); | |
1374 | } | |
1375 | /* | |
1376 | * Check if the requested size is supported. If the requestor | |
1377 | * requests too big a frame then we may be tricked into accessing | |
1378 | * outside of own preallocated frame buffer (in uvd->frame). | |
1379 | * This will cause oops or a security hole. Theoretically, we | |
1380 | * could only clamp the size down to acceptable bounds, but then | |
1381 | * we'd need to figure out how to insert our smaller buffer into | |
1382 | * larger caller's buffer... this is not an easy question. So we | |
1383 | * here just flatly reject too large requests, assuming that the | |
1384 | * caller will resubmit with smaller size. Callers should know | |
1385 | * what size we support (returned by VIDIOCGCAP). However vidcat, | |
1386 | * for one, does not care and allows to ask for any size. | |
1387 | */ | |
1388 | if ((vm->width > VIDEOSIZE_X(uvd->canvas)) || | |
1389 | (vm->height > VIDEOSIZE_Y(uvd->canvas))) { | |
1390 | if (uvd->debug > 0) { | |
1391 | info("VIDIOCMCAPTURE: Size=%dx%d too large; " | |
1392 | "allowed only up to %ldx%ld", vm->width, vm->height, | |
1393 | VIDEOSIZE_X(uvd->canvas), VIDEOSIZE_Y(uvd->canvas)); | |
1394 | } | |
1395 | return -EINVAL; | |
1396 | } | |
1397 | /* Check if the palette is supported */ | |
1398 | if (((1L << vm->format) & uvd->paletteBits) == 0) { | |
1399 | if (uvd->debug > 0) { | |
1400 | info("VIDIOCMCAPTURE: format=%d. not supported" | |
1401 | " (paletteBits=$%08lx)", | |
1402 | vm->format, uvd->paletteBits); | |
1403 | } | |
1404 | return -EINVAL; | |
1405 | } | |
1406 | if ((vm->frame < 0) || (vm->frame >= USBVIDEO_NUMFRAMES)) { | |
1407 | err("VIDIOCMCAPTURE: vm.frame=%d. !E [0-%d]", vm->frame, USBVIDEO_NUMFRAMES-1); | |
1408 | return -EINVAL; | |
1409 | } | |
1410 | if (uvd->frame[vm->frame].frameState == FrameState_Grabbing) { | |
1411 | /* Not an error - can happen */ | |
1412 | } | |
1413 | uvd->frame[vm->frame].request = VIDEOSIZE(vm->width, vm->height); | |
1414 | uvd->frame[vm->frame].palette = vm->format; | |
1415 | ||
1416 | /* Mark it as ready */ | |
1417 | uvd->frame[vm->frame].frameState = FrameState_Ready; | |
1418 | ||
1419 | return usbvideo_NewFrame(uvd, vm->frame); | |
1420 | } | |
1421 | case VIDIOCSYNC: | |
1422 | { | |
1423 | int *frameNum = arg; | |
1424 | int ret; | |
1425 | ||
1426 | if (*frameNum < 0 || *frameNum >= USBVIDEO_NUMFRAMES) | |
1427 | return -EINVAL; | |
d56410e0 | 1428 | |
1da177e4 LT |
1429 | if (uvd->debug >= 1) |
1430 | info("VIDIOCSYNC: syncing to frame %d.", *frameNum); | |
1431 | if (uvd->flags & FLAGS_NO_DECODING) | |
1432 | ret = usbvideo_GetFrame(uvd, *frameNum); | |
1433 | else if (VALID_CALLBACK(uvd, getFrame)) { | |
1434 | ret = GET_CALLBACK(uvd, getFrame)(uvd, *frameNum); | |
1435 | if ((ret < 0) && (uvd->debug >= 1)) { | |
1436 | err("VIDIOCSYNC: getFrame() returned %d.", ret); | |
1437 | } | |
1438 | } else { | |
1439 | err("VIDIOCSYNC: getFrame is not set"); | |
1440 | ret = -EFAULT; | |
1441 | } | |
1442 | ||
1443 | /* | |
1444 | * The frame is in FrameState_Done_Hold state. Release it | |
1445 | * right now because its data is already mapped into | |
1446 | * the user space and it's up to the application to | |
1447 | * make use of it until it asks for another frame. | |
1448 | */ | |
1449 | uvd->frame[*frameNum].frameState = FrameState_Unused; | |
1450 | return ret; | |
1451 | } | |
1452 | case VIDIOCGFBUF: | |
1453 | { | |
1454 | struct video_buffer *vb = arg; | |
1455 | ||
1456 | memset(vb, 0, sizeof(*vb)); | |
d56410e0 MCC |
1457 | return 0; |
1458 | } | |
1da177e4 LT |
1459 | case VIDIOCKEY: |
1460 | return 0; | |
1461 | ||
1462 | case VIDIOCCAPTURE: | |
1463 | return -EINVAL; | |
1464 | ||
1465 | case VIDIOCSFBUF: | |
1466 | ||
1467 | case VIDIOCGTUNER: | |
1468 | case VIDIOCSTUNER: | |
1469 | ||
1470 | case VIDIOCGFREQ: | |
1471 | case VIDIOCSFREQ: | |
1472 | ||
1473 | case VIDIOCGAUDIO: | |
1474 | case VIDIOCSAUDIO: | |
1475 | return -EINVAL; | |
1476 | ||
1477 | default: | |
1478 | return -ENOIOCTLCMD; | |
1479 | } | |
1480 | return 0; | |
1481 | } | |
1482 | ||
1483 | static int usbvideo_v4l_ioctl(struct inode *inode, struct file *file, | |
1484 | unsigned int cmd, unsigned long arg) | |
1485 | { | |
1486 | return video_usercopy(inode, file, cmd, arg, usbvideo_v4l_do_ioctl); | |
1487 | } | |
1488 | ||
1489 | /* | |
1490 | * usbvideo_v4l_read() | |
1491 | * | |
1492 | * This is mostly boring stuff. We simply ask for a frame and when it | |
1493 | * arrives copy all the video data from it into user space. There is | |
1494 | * no obvious need to override this method. | |
1495 | * | |
1496 | * History: | |
1497 | * 20-Oct-2000 Created. | |
1498 | * 01-Nov-2000 Added mutex (uvd->lock). | |
1499 | */ | |
1500 | static ssize_t usbvideo_v4l_read(struct file *file, char __user *buf, | |
1501 | size_t count, loff_t *ppos) | |
1502 | { | |
1503 | struct uvd *uvd = file->private_data; | |
1504 | int noblock = file->f_flags & O_NONBLOCK; | |
1505 | int frmx = -1, i; | |
1506 | struct usbvideo_frame *frame; | |
1507 | ||
1508 | if (!CAMERA_IS_OPERATIONAL(uvd) || (buf == NULL)) | |
1509 | return -EFAULT; | |
1510 | ||
1511 | if (uvd->debug >= 1) | |
1512 | info("%s: %Zd. bytes, noblock=%d.", __FUNCTION__, count, noblock); | |
1513 | ||
4186ecf8 | 1514 | mutex_lock(&uvd->lock); |
1da177e4 LT |
1515 | |
1516 | /* See if a frame is completed, then use it. */ | |
1517 | for(i = 0; i < USBVIDEO_NUMFRAMES; i++) { | |
1518 | if ((uvd->frame[i].frameState == FrameState_Done) || | |
1519 | (uvd->frame[i].frameState == FrameState_Done_Hold) || | |
1520 | (uvd->frame[i].frameState == FrameState_Error)) { | |
1521 | frmx = i; | |
1522 | break; | |
1523 | } | |
1524 | } | |
1525 | ||
1526 | /* FIXME: If we don't start a frame here then who ever does? */ | |
1527 | if (noblock && (frmx == -1)) { | |
1528 | count = -EAGAIN; | |
1529 | goto read_done; | |
1530 | } | |
1531 | ||
1532 | /* | |
1533 | * If no FrameState_Done, look for a FrameState_Grabbing state. | |
1534 | * See if a frame is in process (grabbing), then use it. | |
1535 | * We will need to wait until it becomes cooked, of course. | |
1536 | */ | |
1537 | if (frmx == -1) { | |
1538 | for(i = 0; i < USBVIDEO_NUMFRAMES; i++) { | |
1539 | if (uvd->frame[i].frameState == FrameState_Grabbing) { | |
1540 | frmx = i; | |
1541 | break; | |
1542 | } | |
1543 | } | |
1544 | } | |
1545 | ||
1546 | /* | |
1547 | * If no frame is active, start one. We don't care which one | |
1548 | * it will be, so #0 is as good as any. | |
1549 | * In read access mode we don't have convenience of VIDIOCMCAPTURE | |
1550 | * to specify the requested palette (video format) on per-frame | |
1551 | * basis. This means that we have to return data in -some- format | |
1552 | * and just hope that the client knows what to do with it. | |
1553 | * The default format is configured in uvd->defaultPalette field | |
1554 | * as one of VIDEO_PALETTE_xxx values. We stuff it into the new | |
1555 | * frame and initiate the frame filling process. | |
1556 | */ | |
1557 | if (frmx == -1) { | |
1558 | if (uvd->defaultPalette == 0) { | |
1559 | err("%s: No default palette; don't know what to do!", __FUNCTION__); | |
1560 | count = -EFAULT; | |
1561 | goto read_done; | |
1562 | } | |
1563 | frmx = 0; | |
1564 | /* | |
1565 | * We have no per-frame control over video size. | |
1566 | * Therefore we only can use whatever size was | |
1567 | * specified as default. | |
1568 | */ | |
1569 | uvd->frame[frmx].request = uvd->videosize; | |
1570 | uvd->frame[frmx].palette = uvd->defaultPalette; | |
1571 | uvd->frame[frmx].frameState = FrameState_Ready; | |
1572 | usbvideo_NewFrame(uvd, frmx); | |
1573 | /* Now frame 0 is supposed to start filling... */ | |
1574 | } | |
1575 | ||
1576 | /* | |
1577 | * Get a pointer to the active frame. It is either previously | |
1578 | * completed frame or frame in progress but not completed yet. | |
1579 | */ | |
1580 | frame = &uvd->frame[frmx]; | |
1581 | ||
1582 | /* | |
1583 | * Sit back & wait until the frame gets filled and postprocessed. | |
1584 | * If we fail to get the picture [in time] then return the error. | |
1585 | * In this call we specify that we want the frame to be waited for, | |
1586 | * postprocessed and switched into FrameState_Done_Hold state. This | |
1587 | * state is used to hold the frame as "fully completed" between | |
1588 | * subsequent partial reads of the same frame. | |
1589 | */ | |
1590 | if (frame->frameState != FrameState_Done_Hold) { | |
1591 | long rv = -EFAULT; | |
1592 | if (uvd->flags & FLAGS_NO_DECODING) | |
1593 | rv = usbvideo_GetFrame(uvd, frmx); | |
1594 | else if (VALID_CALLBACK(uvd, getFrame)) | |
1595 | rv = GET_CALLBACK(uvd, getFrame)(uvd, frmx); | |
1596 | else | |
1597 | err("getFrame is not set"); | |
1598 | if ((rv != 0) || (frame->frameState != FrameState_Done_Hold)) { | |
1599 | count = rv; | |
1600 | goto read_done; | |
1601 | } | |
1602 | } | |
1603 | ||
1604 | /* | |
1605 | * Copy bytes to user space. We allow for partial reads, which | |
1606 | * means that the user application can request read less than | |
1607 | * the full frame size. It is up to the application to issue | |
1608 | * subsequent calls until entire frame is read. | |
1609 | * | |
1610 | * First things first, make sure we don't copy more than we | |
1611 | * have - even if the application wants more. That would be | |
1612 | * a big security embarassment! | |
1613 | */ | |
1614 | if ((count + frame->seqRead_Index) > frame->seqRead_Length) | |
1615 | count = frame->seqRead_Length - frame->seqRead_Index; | |
1616 | ||
1617 | /* | |
1618 | * Copy requested amount of data to user space. We start | |
1619 | * copying from the position where we last left it, which | |
1620 | * will be zero for a new frame (not read before). | |
1621 | */ | |
1622 | if (copy_to_user(buf, frame->data + frame->seqRead_Index, count)) { | |
1623 | count = -EFAULT; | |
1624 | goto read_done; | |
1625 | } | |
1626 | ||
1627 | /* Update last read position */ | |
1628 | frame->seqRead_Index += count; | |
1629 | if (uvd->debug >= 1) { | |
1630 | err("%s: {copy} count used=%Zd, new seqRead_Index=%ld", | |
1631 | __FUNCTION__, count, frame->seqRead_Index); | |
1632 | } | |
1633 | ||
1634 | /* Finally check if the frame is done with and "release" it */ | |
1635 | if (frame->seqRead_Index >= frame->seqRead_Length) { | |
1636 | /* All data has been read */ | |
1637 | frame->seqRead_Index = 0; | |
1638 | ||
1639 | /* Mark it as available to be used again. */ | |
1640 | uvd->frame[frmx].frameState = FrameState_Unused; | |
1641 | if (usbvideo_NewFrame(uvd, (frmx + 1) % USBVIDEO_NUMFRAMES)) { | |
1642 | err("%s: usbvideo_NewFrame failed.", __FUNCTION__); | |
1643 | } | |
1644 | } | |
1645 | read_done: | |
4186ecf8 | 1646 | mutex_unlock(&uvd->lock); |
1da177e4 LT |
1647 | return count; |
1648 | } | |
1649 | ||
1650 | /* | |
1651 | * Make all of the blocks of data contiguous | |
1652 | */ | |
1653 | static int usbvideo_CompressIsochronous(struct uvd *uvd, struct urb *urb) | |
1654 | { | |
1655 | char *cdata; | |
1656 | int i, totlen = 0; | |
1657 | ||
1658 | for (i = 0; i < urb->number_of_packets; i++) { | |
1659 | int n = urb->iso_frame_desc[i].actual_length; | |
1660 | int st = urb->iso_frame_desc[i].status; | |
1661 | ||
1662 | cdata = urb->transfer_buffer + urb->iso_frame_desc[i].offset; | |
1663 | ||
1664 | /* Detect and ignore errored packets */ | |
1665 | if (st < 0) { | |
1666 | if (uvd->debug >= 1) | |
1667 | err("Data error: packet=%d. len=%d. status=%d.", i, n, st); | |
1668 | uvd->stats.iso_err_count++; | |
1669 | continue; | |
1670 | } | |
1671 | ||
1672 | /* Detect and ignore empty packets */ | |
1673 | if (n <= 0) { | |
1674 | uvd->stats.iso_skip_count++; | |
1675 | continue; | |
1676 | } | |
1677 | totlen += n; /* Little local accounting */ | |
1678 | RingQueue_Enqueue(&uvd->dp, cdata, n); | |
1679 | } | |
1680 | return totlen; | |
1681 | } | |
1682 | ||
7d12e780 | 1683 | static void usbvideo_IsocIrq(struct urb *urb) |
1da177e4 LT |
1684 | { |
1685 | int i, ret, len; | |
1686 | struct uvd *uvd = urb->context; | |
1687 | ||
1688 | /* We don't want to do anything if we are about to be removed! */ | |
1689 | if (!CAMERA_IS_OPERATIONAL(uvd)) | |
1690 | return; | |
1691 | #if 0 | |
1692 | if (urb->actual_length > 0) { | |
1693 | info("urb=$%p status=%d. errcount=%d. length=%d.", | |
1694 | urb, urb->status, urb->error_count, urb->actual_length); | |
1695 | } else { | |
1696 | static int c = 0; | |
1697 | if (c++ % 100 == 0) | |
1698 | info("No Isoc data"); | |
1699 | } | |
1700 | #endif | |
1701 | ||
1702 | if (!uvd->streaming) { | |
1703 | if (uvd->debug >= 1) | |
1704 | info("Not streaming, but interrupt!"); | |
1705 | return; | |
1706 | } | |
d56410e0 | 1707 | |
1da177e4 LT |
1708 | uvd->stats.urb_count++; |
1709 | if (urb->actual_length <= 0) | |
1710 | goto urb_done_with; | |
1711 | ||
1712 | /* Copy the data received into ring queue */ | |
1713 | len = usbvideo_CompressIsochronous(uvd, urb); | |
1714 | uvd->stats.urb_length = len; | |
1715 | if (len <= 0) | |
1716 | goto urb_done_with; | |
1717 | ||
1718 | /* Here we got some data */ | |
1719 | uvd->stats.data_count += len; | |
1720 | RingQueue_WakeUpInterruptible(&uvd->dp); | |
1721 | ||
1722 | urb_done_with: | |
1723 | for (i = 0; i < FRAMES_PER_DESC; i++) { | |
1724 | urb->iso_frame_desc[i].status = 0; | |
1725 | urb->iso_frame_desc[i].actual_length = 0; | |
1726 | } | |
1727 | urb->status = 0; | |
1728 | urb->dev = uvd->dev; | |
1729 | ret = usb_submit_urb (urb, GFP_KERNEL); | |
1730 | if(ret) | |
1731 | err("usb_submit_urb error (%d)", ret); | |
1732 | return; | |
1733 | } | |
1734 | ||
1735 | /* | |
1736 | * usbvideo_StartDataPump() | |
1737 | * | |
1738 | * History: | |
1739 | * 27-Jan-2000 Used ibmcam->iface, ibmcam->ifaceAltActive instead | |
1740 | * of hardcoded values. Simplified by using for loop, | |
1741 | * allowed any number of URBs. | |
1742 | */ | |
1743 | static int usbvideo_StartDataPump(struct uvd *uvd) | |
1744 | { | |
1745 | struct usb_device *dev = uvd->dev; | |
1746 | int i, errFlag; | |
1747 | ||
1748 | if (uvd->debug > 1) | |
1749 | info("%s($%p)", __FUNCTION__, uvd); | |
1750 | ||
1751 | if (!CAMERA_IS_OPERATIONAL(uvd)) { | |
1752 | err("%s: Camera is not operational", __FUNCTION__); | |
1753 | return -EFAULT; | |
1754 | } | |
1755 | uvd->curframe = -1; | |
1756 | ||
1757 | /* Alternate interface 1 is is the biggest frame size */ | |
1758 | i = usb_set_interface(dev, uvd->iface, uvd->ifaceAltActive); | |
1759 | if (i < 0) { | |
1760 | err("%s: usb_set_interface error", __FUNCTION__); | |
1761 | uvd->last_error = i; | |
1762 | return -EBUSY; | |
1763 | } | |
1764 | if (VALID_CALLBACK(uvd, videoStart)) | |
1765 | GET_CALLBACK(uvd, videoStart)(uvd); | |
d56410e0 | 1766 | else |
1da177e4 LT |
1767 | err("%s: videoStart not set", __FUNCTION__); |
1768 | ||
1769 | /* We double buffer the Iso lists */ | |
1770 | for (i=0; i < USBVIDEO_NUMSBUF; i++) { | |
1771 | int j, k; | |
1772 | struct urb *urb = uvd->sbuf[i].urb; | |
1773 | urb->dev = dev; | |
1774 | urb->context = uvd; | |
1775 | urb->pipe = usb_rcvisocpipe(dev, uvd->video_endp); | |
1776 | urb->interval = 1; | |
1777 | urb->transfer_flags = URB_ISO_ASAP; | |
1778 | urb->transfer_buffer = uvd->sbuf[i].data; | |
1779 | urb->complete = usbvideo_IsocIrq; | |
1780 | urb->number_of_packets = FRAMES_PER_DESC; | |
1781 | urb->transfer_buffer_length = uvd->iso_packet_len * FRAMES_PER_DESC; | |
1782 | for (j=k=0; j < FRAMES_PER_DESC; j++, k += uvd->iso_packet_len) { | |
1783 | urb->iso_frame_desc[j].offset = k; | |
1784 | urb->iso_frame_desc[j].length = uvd->iso_packet_len; | |
1785 | } | |
1786 | } | |
1787 | ||
1788 | /* Submit all URBs */ | |
1789 | for (i=0; i < USBVIDEO_NUMSBUF; i++) { | |
1790 | errFlag = usb_submit_urb(uvd->sbuf[i].urb, GFP_KERNEL); | |
1791 | if (errFlag) | |
1792 | err("%s: usb_submit_isoc(%d) ret %d", __FUNCTION__, i, errFlag); | |
1793 | } | |
1794 | ||
1795 | uvd->streaming = 1; | |
1796 | if (uvd->debug > 1) | |
1797 | info("%s: streaming=1 video_endp=$%02x", __FUNCTION__, uvd->video_endp); | |
1798 | return 0; | |
1799 | } | |
1800 | ||
1801 | /* | |
1802 | * usbvideo_StopDataPump() | |
1803 | * | |
1804 | * This procedure stops streaming and deallocates URBs. Then it | |
1805 | * activates zero-bandwidth alt. setting of the video interface. | |
1806 | * | |
1807 | * History: | |
1808 | * 22-Jan-2000 Corrected order of actions to work after surprise removal. | |
1809 | * 27-Jan-2000 Used uvd->iface, uvd->ifaceAltInactive instead of hardcoded values. | |
1810 | */ | |
1811 | static void usbvideo_StopDataPump(struct uvd *uvd) | |
1812 | { | |
1813 | int i, j; | |
1814 | ||
1815 | if ((uvd == NULL) || (!uvd->streaming) || (uvd->dev == NULL)) | |
1816 | return; | |
1817 | ||
1818 | if (uvd->debug > 1) | |
1819 | info("%s($%p)", __FUNCTION__, uvd); | |
1820 | ||
1821 | /* Unschedule all of the iso td's */ | |
1822 | for (i=0; i < USBVIDEO_NUMSBUF; i++) { | |
1823 | usb_kill_urb(uvd->sbuf[i].urb); | |
1824 | } | |
1825 | if (uvd->debug > 1) | |
1826 | info("%s: streaming=0", __FUNCTION__); | |
1827 | uvd->streaming = 0; | |
1828 | ||
1829 | if (!uvd->remove_pending) { | |
1830 | /* Invoke minidriver's magic to stop the camera */ | |
1831 | if (VALID_CALLBACK(uvd, videoStop)) | |
1832 | GET_CALLBACK(uvd, videoStop)(uvd); | |
d56410e0 | 1833 | else |
1da177e4 LT |
1834 | err("%s: videoStop not set", __FUNCTION__); |
1835 | ||
1836 | /* Set packet size to 0 */ | |
1837 | j = usb_set_interface(uvd->dev, uvd->iface, uvd->ifaceAltInactive); | |
1838 | if (j < 0) { | |
1839 | err("%s: usb_set_interface() error %d.", __FUNCTION__, j); | |
1840 | uvd->last_error = j; | |
1841 | } | |
1842 | } | |
1843 | } | |
1844 | ||
1845 | /* | |
1846 | * usbvideo_NewFrame() | |
1847 | * | |
1848 | * History: | |
1849 | * 29-Mar-00 Added copying of previous frame into the current one. | |
1850 | * 6-Aug-00 Added model 3 video sizes, removed redundant width, height. | |
1851 | */ | |
1852 | static int usbvideo_NewFrame(struct uvd *uvd, int framenum) | |
1853 | { | |
1854 | struct usbvideo_frame *frame; | |
1855 | int n; | |
1856 | ||
1857 | if (uvd->debug > 1) | |
1858 | info("usbvideo_NewFrame($%p,%d.)", uvd, framenum); | |
1859 | ||
1860 | /* If we're not grabbing a frame right now and the other frame is */ | |
1861 | /* ready to be grabbed into, then use it instead */ | |
1862 | if (uvd->curframe != -1) | |
1863 | return 0; | |
1864 | ||
1865 | /* If necessary we adjust picture settings between frames */ | |
1866 | if (!uvd->settingsAdjusted) { | |
1867 | if (VALID_CALLBACK(uvd, adjustPicture)) | |
1868 | GET_CALLBACK(uvd, adjustPicture)(uvd); | |
1869 | uvd->settingsAdjusted = 1; | |
1870 | } | |
1871 | ||
1872 | n = (framenum + 1) % USBVIDEO_NUMFRAMES; | |
1873 | if (uvd->frame[n].frameState == FrameState_Ready) | |
1874 | framenum = n; | |
1875 | ||
1876 | frame = &uvd->frame[framenum]; | |
1877 | ||
1878 | frame->frameState = FrameState_Grabbing; | |
1879 | frame->scanstate = ScanState_Scanning; | |
1880 | frame->seqRead_Length = 0; /* Accumulated in xxx_parse_data() */ | |
1881 | frame->deinterlace = Deinterlace_None; | |
1882 | frame->flags = 0; /* No flags yet, up to minidriver (or us) to set them */ | |
1883 | uvd->curframe = framenum; | |
1884 | ||
1885 | /* | |
1886 | * Normally we would want to copy previous frame into the current one | |
1887 | * before we even start filling it with data; this allows us to stop | |
1888 | * filling at any moment; top portion of the frame will be new and | |
1889 | * bottom portion will stay as it was in previous frame. If we don't | |
1890 | * do that then missing chunks of video stream will result in flickering | |
1891 | * portions of old data whatever it was before. | |
1892 | * | |
1893 | * If we choose not to copy previous frame (to, for example, save few | |
1894 | * bus cycles - the frame can be pretty large!) then we have an option | |
1895 | * to clear the frame before using. If we experience losses in this | |
1896 | * mode then missing picture will be black (no flickering). | |
1897 | * | |
1898 | * Finally, if user chooses not to clean the current frame before | |
1899 | * filling it with data then the old data will be visible if we fail | |
1900 | * to refill entire frame with new data. | |
1901 | */ | |
1902 | if (!(uvd->flags & FLAGS_SEPARATE_FRAMES)) { | |
1903 | /* This copies previous frame into this one to mask losses */ | |
1904 | int prev = (framenum - 1 + USBVIDEO_NUMFRAMES) % USBVIDEO_NUMFRAMES; | |
1905 | memmove(frame->data, uvd->frame[prev].data, uvd->max_frame_size); | |
1906 | } else { | |
1907 | if (uvd->flags & FLAGS_CLEAN_FRAMES) { | |
1908 | /* This provides a "clean" frame but slows things down */ | |
1909 | memset(frame->data, 0, uvd->max_frame_size); | |
1910 | } | |
1911 | } | |
1912 | return 0; | |
1913 | } | |
1914 | ||
1915 | /* | |
1916 | * usbvideo_CollectRawData() | |
1917 | * | |
1918 | * This procedure can be used instead of 'processData' callback if you | |
1919 | * only want to dump the raw data from the camera into the output | |
1920 | * device (frame buffer). You can look at it with V4L client, but the | |
1921 | * image will be unwatchable. The main purpose of this code and of the | |
1922 | * mode FLAGS_NO_DECODING is debugging and capturing of datastreams from | |
1923 | * new, unknown cameras. This procedure will be automatically invoked | |
1924 | * instead of the specified callback handler when uvd->flags has bit | |
1925 | * FLAGS_NO_DECODING set. Therefore, any regular build of any driver | |
1926 | * based on usbvideo can use this feature at any time. | |
1927 | */ | |
1928 | static void usbvideo_CollectRawData(struct uvd *uvd, struct usbvideo_frame *frame) | |
1929 | { | |
1930 | int n; | |
1931 | ||
1932 | assert(uvd != NULL); | |
1933 | assert(frame != NULL); | |
1934 | ||
1935 | /* Try to move data from queue into frame buffer */ | |
1936 | n = RingQueue_GetLength(&uvd->dp); | |
1937 | if (n > 0) { | |
1938 | int m; | |
1939 | /* See how much space we have left */ | |
1940 | m = uvd->max_frame_size - frame->seqRead_Length; | |
1941 | if (n > m) | |
1942 | n = m; | |
1943 | /* Now move that much data into frame buffer */ | |
1944 | RingQueue_Dequeue( | |
1945 | &uvd->dp, | |
1946 | frame->data + frame->seqRead_Length, | |
1947 | m); | |
1948 | frame->seqRead_Length += m; | |
1949 | } | |
1950 | /* See if we filled the frame */ | |
1951 | if (frame->seqRead_Length >= uvd->max_frame_size) { | |
1952 | frame->frameState = FrameState_Done; | |
1953 | uvd->curframe = -1; | |
1954 | uvd->stats.frame_num++; | |
1955 | } | |
1956 | } | |
1957 | ||
1958 | static int usbvideo_GetFrame(struct uvd *uvd, int frameNum) | |
1959 | { | |
1960 | struct usbvideo_frame *frame = &uvd->frame[frameNum]; | |
1961 | ||
1962 | if (uvd->debug >= 2) | |
1963 | info("%s($%p,%d.)", __FUNCTION__, uvd, frameNum); | |
1964 | ||
1965 | switch (frame->frameState) { | |
d56410e0 | 1966 | case FrameState_Unused: |
1da177e4 LT |
1967 | if (uvd->debug >= 2) |
1968 | info("%s: FrameState_Unused", __FUNCTION__); | |
1969 | return -EINVAL; | |
d56410e0 MCC |
1970 | case FrameState_Ready: |
1971 | case FrameState_Grabbing: | |
1972 | case FrameState_Error: | |
1973 | { | |
1da177e4 LT |
1974 | int ntries, signalPending; |
1975 | redo: | |
1976 | if (!CAMERA_IS_OPERATIONAL(uvd)) { | |
1977 | if (uvd->debug >= 2) | |
1978 | info("%s: Camera is not operational (1)", __FUNCTION__); | |
1979 | return -EIO; | |
1980 | } | |
d56410e0 | 1981 | ntries = 0; |
1da177e4 LT |
1982 | do { |
1983 | RingQueue_InterruptibleSleepOn(&uvd->dp); | |
1984 | signalPending = signal_pending(current); | |
1985 | if (!CAMERA_IS_OPERATIONAL(uvd)) { | |
1986 | if (uvd->debug >= 2) | |
1987 | info("%s: Camera is not operational (2)", __FUNCTION__); | |
1988 | return -EIO; | |
1989 | } | |
1990 | assert(uvd->fbuf != NULL); | |
1991 | if (signalPending) { | |
1992 | if (uvd->debug >= 2) | |
1993 | info("%s: Signal=$%08x", __FUNCTION__, signalPending); | |
1994 | if (uvd->flags & FLAGS_RETRY_VIDIOCSYNC) { | |
1995 | usbvideo_TestPattern(uvd, 1, 0); | |
1996 | uvd->curframe = -1; | |
1997 | uvd->stats.frame_num++; | |
1998 | if (uvd->debug >= 2) | |
1999 | info("%s: Forced test pattern screen", __FUNCTION__); | |
2000 | return 0; | |
2001 | } else { | |
2002 | /* Standard answer: Interrupted! */ | |
2003 | if (uvd->debug >= 2) | |
2004 | info("%s: Interrupted!", __FUNCTION__); | |
2005 | return -EINTR; | |
2006 | } | |
2007 | } else { | |
2008 | /* No signals - we just got new data in dp queue */ | |
2009 | if (uvd->flags & FLAGS_NO_DECODING) | |
2010 | usbvideo_CollectRawData(uvd, frame); | |
2011 | else if (VALID_CALLBACK(uvd, processData)) | |
2012 | GET_CALLBACK(uvd, processData)(uvd, frame); | |
d56410e0 | 2013 | else |
1da177e4 LT |
2014 | err("%s: processData not set", __FUNCTION__); |
2015 | } | |
2016 | } while (frame->frameState == FrameState_Grabbing); | |
2017 | if (uvd->debug >= 2) { | |
2018 | info("%s: Grabbing done; state=%d. (%lu. bytes)", | |
2019 | __FUNCTION__, frame->frameState, frame->seqRead_Length); | |
2020 | } | |
2021 | if (frame->frameState == FrameState_Error) { | |
2022 | int ret = usbvideo_NewFrame(uvd, frameNum); | |
2023 | if (ret < 0) { | |
2024 | err("%s: usbvideo_NewFrame() failed (%d.)", __FUNCTION__, ret); | |
2025 | return ret; | |
2026 | } | |
2027 | goto redo; | |
2028 | } | |
2029 | /* Note that we fall through to meet our destiny below */ | |
d56410e0 MCC |
2030 | } |
2031 | case FrameState_Done: | |
1da177e4 LT |
2032 | /* |
2033 | * Do all necessary postprocessing of data prepared in | |
2034 | * "interrupt" code and the collecting code above. The | |
2035 | * frame gets marked as FrameState_Done by queue parsing code. | |
2036 | * This status means that we collected enough data and | |
2037 | * most likely processed it as we went through. However | |
2038 | * the data may need postprocessing, such as deinterlacing | |
2039 | * or picture adjustments implemented in software (horror!) | |
2040 | * | |
2041 | * As soon as the frame becomes "final" it gets promoted to | |
2042 | * FrameState_Done_Hold status where it will remain until the | |
2043 | * caller consumed all the video data from the frame. Then | |
2044 | * the empty shell of ex-frame is thrown out for dogs to eat. | |
2045 | * But we, worried about pets, will recycle the frame! | |
2046 | */ | |
2047 | uvd->stats.frame_num++; | |
2048 | if ((uvd->flags & FLAGS_NO_DECODING) == 0) { | |
2049 | if (VALID_CALLBACK(uvd, postProcess)) | |
2050 | GET_CALLBACK(uvd, postProcess)(uvd, frame); | |
2051 | if (frame->flags & USBVIDEO_FRAME_FLAG_SOFTWARE_CONTRAST) | |
2052 | usbvideo_SoftwareContrastAdjustment(uvd, frame); | |
2053 | } | |
2054 | frame->frameState = FrameState_Done_Hold; | |
2055 | if (uvd->debug >= 2) | |
2056 | info("%s: Entered FrameState_Done_Hold state.", __FUNCTION__); | |
2057 | return 0; | |
2058 | ||
2059 | case FrameState_Done_Hold: | |
2060 | /* | |
2061 | * We stay in this state indefinitely until someone external, | |
2062 | * like ioctl() or read() call finishes digesting the frame | |
2063 | * data. Then it will mark the frame as FrameState_Unused and | |
2064 | * it will be released back into the wild to roam freely. | |
2065 | */ | |
2066 | if (uvd->debug >= 2) | |
2067 | info("%s: FrameState_Done_Hold state.", __FUNCTION__); | |
2068 | return 0; | |
2069 | } | |
2070 | ||
2071 | /* Catch-all for other cases. We shall not be here. */ | |
2072 | err("%s: Invalid state %d.", __FUNCTION__, frame->frameState); | |
2073 | frame->frameState = FrameState_Unused; | |
2074 | return 0; | |
2075 | } | |
2076 | ||
2077 | /* | |
2078 | * usbvideo_DeinterlaceFrame() | |
2079 | * | |
2080 | * This procedure deinterlaces the given frame. Some cameras produce | |
2081 | * only half of scanlines - sometimes only even lines, sometimes only | |
2082 | * odd lines. The deinterlacing method is stored in frame->deinterlace | |
2083 | * variable. | |
2084 | * | |
2085 | * Here we scan the frame vertically and replace missing scanlines with | |
2086 | * average between surrounding ones - before and after. If we have no | |
2087 | * line above then we just copy next line. Similarly, if we need to | |
2088 | * create a last line then preceding line is used. | |
2089 | */ | |
2090 | void usbvideo_DeinterlaceFrame(struct uvd *uvd, struct usbvideo_frame *frame) | |
2091 | { | |
2092 | if ((uvd == NULL) || (frame == NULL)) | |
2093 | return; | |
2094 | ||
2095 | if ((frame->deinterlace == Deinterlace_FillEvenLines) || | |
2096 | (frame->deinterlace == Deinterlace_FillOddLines)) | |
2097 | { | |
2098 | const int v4l_linesize = VIDEOSIZE_X(frame->request) * V4L_BYTES_PER_PIXEL; | |
2099 | int i = (frame->deinterlace == Deinterlace_FillEvenLines) ? 0 : 1; | |
2100 | ||
2101 | for (; i < VIDEOSIZE_Y(frame->request); i += 2) { | |
2102 | const unsigned char *fs1, *fs2; | |
2103 | unsigned char *fd; | |
2104 | int ip, in, j; /* Previous and next lines */ | |
2105 | ||
2106 | /* | |
2107 | * Need to average lines before and after 'i'. | |
2108 | * If we go out of bounds seeking those lines then | |
2109 | * we point back to existing line. | |
2110 | */ | |
2111 | ip = i - 1; /* First, get rough numbers */ | |
2112 | in = i + 1; | |
2113 | ||
2114 | /* Now validate */ | |
2115 | if (ip < 0) | |
2116 | ip = in; | |
2117 | if (in >= VIDEOSIZE_Y(frame->request)) | |
2118 | in = ip; | |
2119 | ||
2120 | /* Sanity check */ | |
2121 | if ((ip < 0) || (in < 0) || | |
2122 | (ip >= VIDEOSIZE_Y(frame->request)) || | |
2123 | (in >= VIDEOSIZE_Y(frame->request))) | |
2124 | { | |
2125 | err("Error: ip=%d. in=%d. req.height=%ld.", | |
2126 | ip, in, VIDEOSIZE_Y(frame->request)); | |
2127 | break; | |
2128 | } | |
2129 | ||
2130 | /* Now we need to average lines 'ip' and 'in' to produce line 'i' */ | |
2131 | fs1 = frame->data + (v4l_linesize * ip); | |
2132 | fs2 = frame->data + (v4l_linesize * in); | |
2133 | fd = frame->data + (v4l_linesize * i); | |
2134 | ||
2135 | /* Average lines around destination */ | |
2136 | for (j=0; j < v4l_linesize; j++) { | |
2137 | fd[j] = (unsigned char)((((unsigned) fs1[j]) + | |
2138 | ((unsigned)fs2[j])) >> 1); | |
2139 | } | |
2140 | } | |
2141 | } | |
2142 | ||
2143 | /* Optionally display statistics on the screen */ | |
2144 | if (uvd->flags & FLAGS_OVERLAY_STATS) | |
2145 | usbvideo_OverlayStats(uvd, frame); | |
2146 | } | |
2147 | ||
2148 | EXPORT_SYMBOL(usbvideo_DeinterlaceFrame); | |
2149 | ||
2150 | /* | |
2151 | * usbvideo_SoftwareContrastAdjustment() | |
2152 | * | |
2153 | * This code adjusts the contrast of the frame, assuming RGB24 format. | |
2154 | * As most software image processing, this job is CPU-intensive. | |
2155 | * Get a camera that supports hardware adjustment! | |
2156 | * | |
2157 | * History: | |
2158 | * 09-Feb-2001 Created. | |
2159 | */ | |
d56410e0 | 2160 | static void usbvideo_SoftwareContrastAdjustment(struct uvd *uvd, |
1da177e4 LT |
2161 | struct usbvideo_frame *frame) |
2162 | { | |
2163 | int i, j, v4l_linesize; | |
2164 | signed long adj; | |
2165 | const int ccm = 128; /* Color correction median - see below */ | |
2166 | ||
2167 | if ((uvd == NULL) || (frame == NULL)) { | |
2168 | err("%s: Illegal call.", __FUNCTION__); | |
2169 | return; | |
2170 | } | |
2171 | adj = (uvd->vpic.contrast - 0x8000) >> 8; /* -128..+127 = -ccm..+(ccm-1)*/ | |
2172 | RESTRICT_TO_RANGE(adj, -ccm, ccm+1); | |
2173 | if (adj == 0) { | |
2174 | /* In rare case of no adjustment */ | |
2175 | return; | |
2176 | } | |
2177 | v4l_linesize = VIDEOSIZE_X(frame->request) * V4L_BYTES_PER_PIXEL; | |
2178 | for (i=0; i < VIDEOSIZE_Y(frame->request); i++) { | |
2179 | unsigned char *fd = frame->data + (v4l_linesize * i); | |
2180 | for (j=0; j < v4l_linesize; j++) { | |
2181 | signed long v = (signed long) fd[j]; | |
2182 | /* Magnify up to 2 times, reduce down to zero */ | |
2183 | v = 128 + ((ccm + adj) * (v - 128)) / ccm; | |
2184 | RESTRICT_TO_RANGE(v, 0, 0xFF); /* Must flatten tails */ | |
2185 | fd[j] = (unsigned char) v; | |
2186 | } | |
2187 | } | |
2188 | } | |
2189 | ||
2190 | MODULE_LICENSE("GPL"); |