Commit | Line | Data |
---|---|---|
1c1e45d1 HV |
1 | /* |
2 | * cx18 file operation functions | |
3 | * | |
4 | * Derived from ivtv-fileops.c | |
5 | * | |
6 | * Copyright (C) 2007 Hans Verkuil <hverkuil@xs4all.nl> | |
1ed9dcc8 | 7 | * Copyright (C) 2008 Andy Walls <awalls@radix.net> |
1c1e45d1 HV |
8 | * |
9 | * This program is free software; you can redistribute it and/or modify | |
10 | * it under the terms of the GNU General Public License as published by | |
11 | * the Free Software Foundation; either version 2 of the License, or | |
12 | * (at your option) any later version. | |
13 | * | |
14 | * This program is distributed in the hope that it will be useful, | |
15 | * but WITHOUT ANY WARRANTY; without even the implied warranty of | |
16 | * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the | |
17 | * GNU General Public License for more details. | |
18 | * | |
19 | * You should have received a copy of the GNU General Public License | |
20 | * along with this program; if not, write to the Free Software | |
21 | * Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA | |
22 | * 02111-1307 USA | |
23 | */ | |
24 | ||
25 | #include "cx18-driver.h" | |
26 | #include "cx18-fileops.h" | |
27 | #include "cx18-i2c.h" | |
28 | #include "cx18-queue.h" | |
29 | #include "cx18-vbi.h" | |
30 | #include "cx18-audio.h" | |
31 | #include "cx18-mailbox.h" | |
32 | #include "cx18-scb.h" | |
33 | #include "cx18-streams.h" | |
34 | #include "cx18-controls.h" | |
35 | #include "cx18-ioctl.h" | |
36 | #include "cx18-cards.h" | |
37 | ||
38 | /* This function tries to claim the stream for a specific file descriptor. | |
39 | If no one else is using this stream then the stream is claimed and | |
40 | associated VBI streams are also automatically claimed. | |
41 | Possible error returns: -EBUSY if someone else has claimed | |
42 | the stream or 0 on success. */ | |
50510993 | 43 | static int cx18_claim_stream(struct cx18_open_id *id, int type) |
1c1e45d1 HV |
44 | { |
45 | struct cx18 *cx = id->cx; | |
46 | struct cx18_stream *s = &cx->streams[type]; | |
47 | struct cx18_stream *s_vbi; | |
48 | int vbi_type; | |
49 | ||
50 | if (test_and_set_bit(CX18_F_S_CLAIMED, &s->s_flags)) { | |
51 | /* someone already claimed this stream */ | |
52 | if (s->id == id->open_id) { | |
53 | /* yes, this file descriptor did. So that's OK. */ | |
54 | return 0; | |
55 | } | |
56 | if (s->id == -1 && type == CX18_ENC_STREAM_TYPE_VBI) { | |
57 | /* VBI is handled already internally, now also assign | |
58 | the file descriptor to this stream for external | |
59 | reading of the stream. */ | |
60 | s->id = id->open_id; | |
61 | CX18_DEBUG_INFO("Start Read VBI\n"); | |
62 | return 0; | |
63 | } | |
64 | /* someone else is using this stream already */ | |
65 | CX18_DEBUG_INFO("Stream %d is busy\n", type); | |
66 | return -EBUSY; | |
67 | } | |
68 | s->id = id->open_id; | |
69 | ||
dd073434 | 70 | /* CX18_ENC_STREAM_TYPE_MPG needs to claim CX18_ENC_STREAM_TYPE_VBI |
1c1e45d1 HV |
71 | (provided VBI insertion is on and sliced VBI is selected), for all |
72 | other streams we're done */ | |
73 | if (type == CX18_ENC_STREAM_TYPE_MPG && | |
dd073434 | 74 | cx->vbi.insert_mpeg && !cx18_raw_vbi(cx)) { |
1c1e45d1 HV |
75 | vbi_type = CX18_ENC_STREAM_TYPE_VBI; |
76 | } else { | |
77 | return 0; | |
78 | } | |
79 | s_vbi = &cx->streams[vbi_type]; | |
80 | ||
81 | set_bit(CX18_F_S_CLAIMED, &s_vbi->s_flags); | |
82 | ||
83 | /* mark that it is used internally */ | |
84 | set_bit(CX18_F_S_INTERNAL_USE, &s_vbi->s_flags); | |
85 | return 0; | |
86 | } | |
87 | ||
88 | /* This function releases a previously claimed stream. It will take into | |
89 | account associated VBI streams. */ | |
50510993 | 90 | static void cx18_release_stream(struct cx18_stream *s) |
1c1e45d1 HV |
91 | { |
92 | struct cx18 *cx = s->cx; | |
93 | struct cx18_stream *s_vbi; | |
94 | ||
95 | s->id = -1; | |
96 | if (s->type == CX18_ENC_STREAM_TYPE_VBI && | |
97 | test_bit(CX18_F_S_INTERNAL_USE, &s->s_flags)) { | |
98 | /* this stream is still in use internally */ | |
99 | return; | |
100 | } | |
101 | if (!test_and_clear_bit(CX18_F_S_CLAIMED, &s->s_flags)) { | |
102 | CX18_DEBUG_WARN("Release stream %s not in use!\n", s->name); | |
103 | return; | |
104 | } | |
105 | ||
106 | cx18_flush_queues(s); | |
107 | ||
108 | /* CX18_ENC_STREAM_TYPE_MPG needs to release CX18_ENC_STREAM_TYPE_VBI, | |
109 | for all other streams we're done */ | |
110 | if (s->type == CX18_ENC_STREAM_TYPE_MPG) | |
111 | s_vbi = &cx->streams[CX18_ENC_STREAM_TYPE_VBI]; | |
112 | else | |
113 | return; | |
114 | ||
115 | /* clear internal use flag */ | |
116 | if (!test_and_clear_bit(CX18_F_S_INTERNAL_USE, &s_vbi->s_flags)) { | |
117 | /* was already cleared */ | |
118 | return; | |
119 | } | |
120 | if (s_vbi->id != -1) { | |
121 | /* VBI stream still claimed by a file descriptor */ | |
122 | return; | |
123 | } | |
124 | clear_bit(CX18_F_S_CLAIMED, &s_vbi->s_flags); | |
125 | cx18_flush_queues(s_vbi); | |
126 | } | |
127 | ||
128 | static void cx18_dualwatch(struct cx18 *cx) | |
129 | { | |
130 | struct v4l2_tuner vt; | |
0d82fe80 AW |
131 | u32 new_bitmap; |
132 | u32 new_stereo_mode; | |
133 | const u32 stereo_mask = 0x0300; | |
134 | const u32 dual = 0x0200; | |
d3c5e707 | 135 | u32 h; |
1c1e45d1 HV |
136 | |
137 | new_stereo_mode = cx->params.audio_properties & stereo_mask; | |
138 | memset(&vt, 0, sizeof(vt)); | |
ff2a2001 | 139 | cx18_call_all(cx, tuner, g_tuner, &vt); |
1c1e45d1 HV |
140 | if (vt.audmode == V4L2_TUNER_MODE_LANG1_LANG2 && |
141 | (vt.rxsubchans & V4L2_TUNER_SUB_LANG2)) | |
142 | new_stereo_mode = dual; | |
143 | ||
144 | if (new_stereo_mode == cx->dualwatch_stereo_mode) | |
145 | return; | |
146 | ||
d3c5e707 AW |
147 | new_bitmap = new_stereo_mode |
148 | | (cx->params.audio_properties & ~stereo_mask); | |
1c1e45d1 | 149 | |
d3c5e707 AW |
150 | CX18_DEBUG_INFO("dualwatch: change stereo flag from 0x%x to 0x%x. " |
151 | "new audio_bitmask=0x%ux\n", | |
152 | cx->dualwatch_stereo_mode, new_stereo_mode, new_bitmap); | |
1c1e45d1 | 153 | |
d3c5e707 AW |
154 | h = cx18_find_handle(cx); |
155 | if (h == CX18_INVALID_TASK_HANDLE) { | |
156 | CX18_DEBUG_INFO("dualwatch: can't find valid task handle\n"); | |
157 | return; | |
158 | } | |
159 | ||
160 | if (cx18_vapi(cx, | |
161 | CX18_CPU_SET_AUDIO_PARAMETERS, 2, h, new_bitmap) == 0) { | |
1c1e45d1 HV |
162 | cx->dualwatch_stereo_mode = new_stereo_mode; |
163 | return; | |
164 | } | |
165 | CX18_DEBUG_INFO("dualwatch: changing stereo flag failed\n"); | |
166 | } | |
167 | ||
168 | ||
169 | static struct cx18_buffer *cx18_get_buffer(struct cx18_stream *s, int non_block, int *err) | |
170 | { | |
171 | struct cx18 *cx = s->cx; | |
172 | struct cx18_stream *s_vbi = &cx->streams[CX18_ENC_STREAM_TYPE_VBI]; | |
173 | struct cx18_buffer *buf; | |
174 | DEFINE_WAIT(wait); | |
175 | ||
176 | *err = 0; | |
177 | while (1) { | |
178 | if (s->type == CX18_ENC_STREAM_TYPE_MPG) { | |
302df970 AW |
179 | /* Process pending program info updates and pending |
180 | VBI data */ | |
1c1e45d1 HV |
181 | |
182 | if (time_after(jiffies, cx->dualwatch_jiffies + msecs_to_jiffies(1000))) { | |
183 | cx->dualwatch_jiffies = jiffies; | |
184 | cx18_dualwatch(cx); | |
185 | } | |
186 | if (test_bit(CX18_F_S_INTERNAL_USE, &s_vbi->s_flags) && | |
187 | !test_bit(CX18_F_S_APPL_IO, &s_vbi->s_flags)) { | |
188 | while ((buf = cx18_dequeue(s_vbi, &s_vbi->q_full))) { | |
189 | /* byteswap and process VBI data */ | |
af009cf6 | 190 | cx18_process_vbi_data(cx, buf, |
af009cf6 | 191 | s_vbi->type); |
66c2a6b0 | 192 | cx18_stream_put_buf_fw(s_vbi, buf); |
1c1e45d1 HV |
193 | } |
194 | } | |
195 | buf = &cx->vbi.sliced_mpeg_buf; | |
196 | if (buf->readpos != buf->bytesused) | |
197 | return buf; | |
198 | } | |
199 | ||
1c1e45d1 HV |
200 | /* do we have new data? */ |
201 | buf = cx18_dequeue(s, &s->q_full); | |
202 | if (buf) { | |
203 | if (!test_and_clear_bit(CX18_F_B_NEED_BUF_SWAP, | |
204 | &buf->b_flags)) | |
205 | return buf; | |
206 | if (s->type == CX18_ENC_STREAM_TYPE_MPG) | |
207 | /* byteswap MPG data */ | |
208 | cx18_buf_swap(buf); | |
209 | else { | |
210 | /* byteswap and process VBI data */ | |
776fa869 | 211 | cx18_process_vbi_data(cx, buf, s->type); |
1c1e45d1 HV |
212 | } |
213 | return buf; | |
214 | } | |
215 | ||
216 | /* return if end of stream */ | |
217 | if (!test_bit(CX18_F_S_STREAMING, &s->s_flags)) { | |
218 | CX18_DEBUG_INFO("EOS %s\n", s->name); | |
219 | return NULL; | |
220 | } | |
221 | ||
222 | /* return if file was opened with O_NONBLOCK */ | |
223 | if (non_block) { | |
224 | *err = -EAGAIN; | |
225 | return NULL; | |
226 | } | |
227 | ||
228 | /* wait for more data to arrive */ | |
229 | prepare_to_wait(&s->waitq, &wait, TASK_INTERRUPTIBLE); | |
230 | /* New buffers might have become available before we were added | |
231 | to the waitqueue */ | |
b04bce47 | 232 | if (!atomic_read(&s->q_full.buffers)) |
1c1e45d1 HV |
233 | schedule(); |
234 | finish_wait(&s->waitq, &wait); | |
235 | if (signal_pending(current)) { | |
236 | /* return if a signal was received */ | |
237 | CX18_DEBUG_INFO("User stopped %s\n", s->name); | |
238 | *err = -EINTR; | |
239 | return NULL; | |
240 | } | |
241 | } | |
242 | } | |
243 | ||
244 | static void cx18_setup_sliced_vbi_buf(struct cx18 *cx) | |
245 | { | |
246 | int idx = cx->vbi.inserted_frame % CX18_VBI_FRAMES; | |
247 | ||
248 | cx->vbi.sliced_mpeg_buf.buf = cx->vbi.sliced_mpeg_data[idx]; | |
249 | cx->vbi.sliced_mpeg_buf.bytesused = cx->vbi.sliced_mpeg_size[idx]; | |
250 | cx->vbi.sliced_mpeg_buf.readpos = 0; | |
251 | } | |
252 | ||
253 | static size_t cx18_copy_buf_to_user(struct cx18_stream *s, | |
254 | struct cx18_buffer *buf, char __user *ubuf, size_t ucount) | |
255 | { | |
256 | struct cx18 *cx = s->cx; | |
257 | size_t len = buf->bytesused - buf->readpos; | |
258 | ||
259 | if (len > ucount) | |
260 | len = ucount; | |
261 | if (cx->vbi.insert_mpeg && s->type == CX18_ENC_STREAM_TYPE_MPG && | |
dd073434 | 262 | !cx18_raw_vbi(cx) && buf != &cx->vbi.sliced_mpeg_buf) { |
302df970 AW |
263 | /* |
264 | * Try to find a good splice point in the PS, just before | |
265 | * an MPEG-2 Program Pack start code, and provide only | |
266 | * up to that point to the user, so it's easy to insert VBI data | |
267 | * the next time around. | |
0c629252 AW |
268 | * |
269 | * This will not work for an MPEG-2 TS and has only been | |
270 | * verified by analysis to work for an MPEG-2 PS. Helen Buus | |
271 | * pointed out this works for the CX23416 MPEG-2 DVD compatible | |
272 | * stream, and research indicates both the MPEG 2 SVCD and DVD | |
273 | * stream types use an MPEG-2 PS container. | |
302df970 | 274 | */ |
302df970 AW |
275 | /* |
276 | * An MPEG-2 Program Stream (PS) is a series of | |
277 | * MPEG-2 Program Packs terminated by an | |
278 | * MPEG Program End Code after the last Program Pack. | |
279 | * A Program Pack may hold a PS System Header packet and any | |
280 | * number of Program Elementary Stream (PES) Packets | |
281 | */ | |
1c1e45d1 HV |
282 | const char *start = buf->buf + buf->readpos; |
283 | const char *p = start + 1; | |
284 | const u8 *q; | |
285 | u8 ch = cx->search_pack_header ? 0xba : 0xe0; | |
286 | int stuffing, i; | |
287 | ||
288 | while (start + len > p) { | |
302df970 | 289 | /* Scan for a 0 to find a potential MPEG-2 start code */ |
1c1e45d1 HV |
290 | q = memchr(p, 0, start + len - p); |
291 | if (q == NULL) | |
292 | break; | |
293 | p = q + 1; | |
302df970 AW |
294 | /* |
295 | * Keep looking if not a | |
296 | * MPEG-2 Pack header start code: 0x00 0x00 0x01 0xba | |
297 | * or MPEG-2 video PES start code: 0x00 0x00 0x01 0xe0 | |
298 | */ | |
1c1e45d1 HV |
299 | if ((char *)q + 15 >= buf->buf + buf->bytesused || |
300 | q[1] != 0 || q[2] != 1 || q[3] != ch) | |
301 | continue; | |
302df970 AW |
302 | |
303 | /* If expecting the primary video PES */ | |
1c1e45d1 | 304 | if (!cx->search_pack_header) { |
302df970 | 305 | /* Continue if it couldn't be a PES packet */ |
1c1e45d1 HV |
306 | if ((q[6] & 0xc0) != 0x80) |
307 | continue; | |
302df970 AW |
308 | /* Check if a PTS or PTS & DTS follow */ |
309 | if (((q[7] & 0xc0) == 0x80 && /* PTS only */ | |
310 | (q[9] & 0xf0) == 0x20) || /* PTS only */ | |
311 | ((q[7] & 0xc0) == 0xc0 && /* PTS & DTS */ | |
312 | (q[9] & 0xf0) == 0x30)) { /* DTS follows */ | |
313 | /* Assume we found the video PES hdr */ | |
314 | ch = 0xba; /* next want a Program Pack*/ | |
1c1e45d1 | 315 | cx->search_pack_header = 1; |
302df970 | 316 | p = q + 9; /* Skip this video PES hdr */ |
1c1e45d1 HV |
317 | } |
318 | continue; | |
319 | } | |
302df970 AW |
320 | |
321 | /* We may have found a Program Pack start code */ | |
322 | ||
323 | /* Get the count of stuffing bytes & verify them */ | |
1c1e45d1 HV |
324 | stuffing = q[13] & 7; |
325 | /* all stuffing bytes must be 0xff */ | |
326 | for (i = 0; i < stuffing; i++) | |
327 | if (q[14 + i] != 0xff) | |
328 | break; | |
302df970 AW |
329 | if (i == stuffing && /* right number of stuffing bytes*/ |
330 | (q[4] & 0xc4) == 0x44 && /* marker check */ | |
331 | (q[12] & 3) == 3 && /* marker check */ | |
332 | q[14 + stuffing] == 0 && /* PES Pack or Sys Hdr */ | |
1c1e45d1 HV |
333 | q[15 + stuffing] == 0 && |
334 | q[16 + stuffing] == 1) { | |
302df970 AW |
335 | /* We declare we actually found a Program Pack*/ |
336 | cx->search_pack_header = 0; /* expect vid PES */ | |
1c1e45d1 HV |
337 | len = (char *)q - start; |
338 | cx18_setup_sliced_vbi_buf(cx); | |
339 | break; | |
340 | } | |
341 | } | |
342 | } | |
343 | if (copy_to_user(ubuf, (u8 *)buf->buf + buf->readpos, len)) { | |
344 | CX18_DEBUG_WARN("copy %zd bytes to user failed for %s\n", | |
345 | len, s->name); | |
346 | return -EFAULT; | |
347 | } | |
348 | buf->readpos += len; | |
349 | if (s->type == CX18_ENC_STREAM_TYPE_MPG && | |
350 | buf != &cx->vbi.sliced_mpeg_buf) | |
351 | cx->mpg_data_received += len; | |
352 | return len; | |
353 | } | |
354 | ||
355 | static ssize_t cx18_read(struct cx18_stream *s, char __user *ubuf, | |
356 | size_t tot_count, int non_block) | |
357 | { | |
358 | struct cx18 *cx = s->cx; | |
359 | size_t tot_written = 0; | |
360 | int single_frame = 0; | |
361 | ||
31554ae5 | 362 | if (atomic_read(&cx->ana_capturing) == 0 && s->id == -1) { |
1c1e45d1 HV |
363 | /* shouldn't happen */ |
364 | CX18_DEBUG_WARN("Stream %s not initialized before read\n", | |
365 | s->name); | |
366 | return -EIO; | |
367 | } | |
368 | ||
369 | /* Each VBI buffer is one frame, the v4l2 API says that for VBI the | |
370 | frames should arrive one-by-one, so make sure we never output more | |
371 | than one VBI frame at a time */ | |
dd073434 | 372 | if (s->type == CX18_ENC_STREAM_TYPE_VBI && !cx18_raw_vbi(cx)) |
1c1e45d1 HV |
373 | single_frame = 1; |
374 | ||
375 | for (;;) { | |
376 | struct cx18_buffer *buf; | |
377 | int rc; | |
378 | ||
379 | buf = cx18_get_buffer(s, non_block, &rc); | |
380 | /* if there is no data available... */ | |
381 | if (buf == NULL) { | |
382 | /* if we got data, then return that regardless */ | |
383 | if (tot_written) | |
384 | break; | |
385 | /* EOS condition */ | |
386 | if (rc == 0) { | |
387 | clear_bit(CX18_F_S_STREAMOFF, &s->s_flags); | |
388 | clear_bit(CX18_F_S_APPL_IO, &s->s_flags); | |
389 | cx18_release_stream(s); | |
390 | } | |
391 | /* set errno */ | |
392 | return rc; | |
393 | } | |
394 | ||
395 | rc = cx18_copy_buf_to_user(s, buf, ubuf + tot_written, | |
396 | tot_count - tot_written); | |
397 | ||
398 | if (buf != &cx->vbi.sliced_mpeg_buf) { | |
66c2a6b0 AW |
399 | if (buf->readpos == buf->bytesused) |
400 | cx18_stream_put_buf_fw(s, buf); | |
401 | else | |
b80e1074 | 402 | cx18_push(s, buf, &s->q_full); |
1c1e45d1 HV |
403 | } else if (buf->readpos == buf->bytesused) { |
404 | int idx = cx->vbi.inserted_frame % CX18_VBI_FRAMES; | |
405 | ||
406 | cx->vbi.sliced_mpeg_size[idx] = 0; | |
407 | cx->vbi.inserted_frame++; | |
408 | cx->vbi_data_inserted += buf->bytesused; | |
409 | } | |
410 | if (rc < 0) | |
411 | return rc; | |
412 | tot_written += rc; | |
413 | ||
414 | if (tot_written == tot_count || single_frame) | |
415 | break; | |
416 | } | |
417 | return tot_written; | |
418 | } | |
419 | ||
420 | static ssize_t cx18_read_pos(struct cx18_stream *s, char __user *ubuf, | |
421 | size_t count, loff_t *pos, int non_block) | |
422 | { | |
423 | ssize_t rc = count ? cx18_read(s, ubuf, count, non_block) : 0; | |
424 | struct cx18 *cx = s->cx; | |
425 | ||
426 | CX18_DEBUG_HI_FILE("read %zd from %s, got %zd\n", count, s->name, rc); | |
427 | if (rc > 0) | |
428 | pos += rc; | |
429 | return rc; | |
430 | } | |
431 | ||
432 | int cx18_start_capture(struct cx18_open_id *id) | |
433 | { | |
434 | struct cx18 *cx = id->cx; | |
435 | struct cx18_stream *s = &cx->streams[id->type]; | |
436 | struct cx18_stream *s_vbi; | |
437 | ||
438 | if (s->type == CX18_ENC_STREAM_TYPE_RAD) { | |
439 | /* you cannot read from these stream types. */ | |
440 | return -EPERM; | |
441 | } | |
442 | ||
443 | /* Try to claim this stream. */ | |
444 | if (cx18_claim_stream(id, s->type)) | |
445 | return -EBUSY; | |
446 | ||
447 | /* If capture is already in progress, then we also have to | |
448 | do nothing extra. */ | |
449 | if (test_bit(CX18_F_S_STREAMOFF, &s->s_flags) || | |
450 | test_and_set_bit(CX18_F_S_STREAMING, &s->s_flags)) { | |
451 | set_bit(CX18_F_S_APPL_IO, &s->s_flags); | |
452 | return 0; | |
453 | } | |
454 | ||
455 | /* Start VBI capture if required */ | |
456 | s_vbi = &cx->streams[CX18_ENC_STREAM_TYPE_VBI]; | |
457 | if (s->type == CX18_ENC_STREAM_TYPE_MPG && | |
458 | test_bit(CX18_F_S_INTERNAL_USE, &s_vbi->s_flags) && | |
459 | !test_and_set_bit(CX18_F_S_STREAMING, &s_vbi->s_flags)) { | |
460 | /* Note: the CX18_ENC_STREAM_TYPE_VBI is claimed | |
461 | automatically when the MPG stream is claimed. | |
462 | We only need to start the VBI capturing. */ | |
463 | if (cx18_start_v4l2_encode_stream(s_vbi)) { | |
464 | CX18_DEBUG_WARN("VBI capture start failed\n"); | |
465 | ||
466 | /* Failure, clean up and return an error */ | |
467 | clear_bit(CX18_F_S_STREAMING, &s_vbi->s_flags); | |
468 | clear_bit(CX18_F_S_STREAMING, &s->s_flags); | |
469 | /* also releases the associated VBI stream */ | |
470 | cx18_release_stream(s); | |
471 | return -EIO; | |
472 | } | |
473 | CX18_DEBUG_INFO("VBI insertion started\n"); | |
474 | } | |
475 | ||
476 | /* Tell the card to start capturing */ | |
477 | if (!cx18_start_v4l2_encode_stream(s)) { | |
478 | /* We're done */ | |
479 | set_bit(CX18_F_S_APPL_IO, &s->s_flags); | |
480 | /* Resume a possibly paused encoder */ | |
481 | if (test_and_clear_bit(CX18_F_I_ENC_PAUSED, &cx->i_flags)) | |
482 | cx18_vapi(cx, CX18_CPU_CAPTURE_PAUSE, 1, s->handle); | |
483 | return 0; | |
484 | } | |
485 | ||
486 | /* failure, clean up */ | |
487 | CX18_DEBUG_WARN("Failed to start capturing for stream %s\n", s->name); | |
488 | ||
489 | /* Note: the CX18_ENC_STREAM_TYPE_VBI is released | |
490 | automatically when the MPG stream is released. | |
491 | We only need to stop the VBI capturing. */ | |
492 | if (s->type == CX18_ENC_STREAM_TYPE_MPG && | |
493 | test_bit(CX18_F_S_STREAMING, &s_vbi->s_flags)) { | |
494 | cx18_stop_v4l2_encode_stream(s_vbi, 0); | |
495 | clear_bit(CX18_F_S_STREAMING, &s_vbi->s_flags); | |
496 | } | |
497 | clear_bit(CX18_F_S_STREAMING, &s->s_flags); | |
498 | cx18_release_stream(s); | |
499 | return -EIO; | |
500 | } | |
501 | ||
502 | ssize_t cx18_v4l2_read(struct file *filp, char __user *buf, size_t count, | |
503 | loff_t *pos) | |
504 | { | |
505 | struct cx18_open_id *id = filp->private_data; | |
506 | struct cx18 *cx = id->cx; | |
507 | struct cx18_stream *s = &cx->streams[id->type]; | |
508 | int rc; | |
509 | ||
510 | CX18_DEBUG_HI_FILE("read %zd bytes from %s\n", count, s->name); | |
511 | ||
512 | mutex_lock(&cx->serialize_lock); | |
513 | rc = cx18_start_capture(id); | |
514 | mutex_unlock(&cx->serialize_lock); | |
515 | if (rc) | |
516 | return rc; | |
517 | return cx18_read_pos(s, buf, count, pos, filp->f_flags & O_NONBLOCK); | |
518 | } | |
519 | ||
520 | unsigned int cx18_v4l2_enc_poll(struct file *filp, poll_table *wait) | |
521 | { | |
522 | struct cx18_open_id *id = filp->private_data; | |
523 | struct cx18 *cx = id->cx; | |
524 | struct cx18_stream *s = &cx->streams[id->type]; | |
525 | int eof = test_bit(CX18_F_S_STREAMOFF, &s->s_flags); | |
526 | ||
527 | /* Start a capture if there is none */ | |
528 | if (!eof && !test_bit(CX18_F_S_STREAMING, &s->s_flags)) { | |
529 | int rc; | |
530 | ||
531 | mutex_lock(&cx->serialize_lock); | |
532 | rc = cx18_start_capture(id); | |
533 | mutex_unlock(&cx->serialize_lock); | |
534 | if (rc) { | |
535 | CX18_DEBUG_INFO("Could not start capture for %s (%d)\n", | |
536 | s->name, rc); | |
537 | return POLLERR; | |
538 | } | |
539 | CX18_DEBUG_FILE("Encoder poll started capture\n"); | |
540 | } | |
541 | ||
542 | /* add stream's waitq to the poll list */ | |
543 | CX18_DEBUG_HI_FILE("Encoder poll\n"); | |
544 | poll_wait(filp, &s->waitq, wait); | |
545 | ||
b80e1074 | 546 | if (atomic_read(&s->q_full.buffers)) |
1c1e45d1 HV |
547 | return POLLIN | POLLRDNORM; |
548 | if (eof) | |
549 | return POLLHUP; | |
550 | return 0; | |
551 | } | |
552 | ||
553 | void cx18_stop_capture(struct cx18_open_id *id, int gop_end) | |
554 | { | |
555 | struct cx18 *cx = id->cx; | |
556 | struct cx18_stream *s = &cx->streams[id->type]; | |
557 | ||
558 | CX18_DEBUG_IOCTL("close() of %s\n", s->name); | |
559 | ||
560 | /* 'Unclaim' this stream */ | |
561 | ||
562 | /* Stop capturing */ | |
563 | if (test_bit(CX18_F_S_STREAMING, &s->s_flags)) { | |
564 | struct cx18_stream *s_vbi = | |
565 | &cx->streams[CX18_ENC_STREAM_TYPE_VBI]; | |
566 | ||
567 | CX18_DEBUG_INFO("close stopping capture\n"); | |
568 | /* Special case: a running VBI capture for VBI insertion | |
569 | in the mpeg stream. Need to stop that too. */ | |
570 | if (id->type == CX18_ENC_STREAM_TYPE_MPG && | |
571 | test_bit(CX18_F_S_STREAMING, &s_vbi->s_flags) && | |
572 | !test_bit(CX18_F_S_APPL_IO, &s_vbi->s_flags)) { | |
573 | CX18_DEBUG_INFO("close stopping embedded VBI capture\n"); | |
574 | cx18_stop_v4l2_encode_stream(s_vbi, 0); | |
575 | } | |
576 | if (id->type == CX18_ENC_STREAM_TYPE_VBI && | |
577 | test_bit(CX18_F_S_INTERNAL_USE, &s->s_flags)) | |
578 | /* Also used internally, don't stop capturing */ | |
579 | s->id = -1; | |
580 | else | |
581 | cx18_stop_v4l2_encode_stream(s, gop_end); | |
582 | } | |
583 | if (!gop_end) { | |
584 | clear_bit(CX18_F_S_APPL_IO, &s->s_flags); | |
585 | clear_bit(CX18_F_S_STREAMOFF, &s->s_flags); | |
586 | cx18_release_stream(s); | |
587 | } | |
588 | } | |
589 | ||
bec43661 | 590 | int cx18_v4l2_close(struct file *filp) |
1c1e45d1 HV |
591 | { |
592 | struct cx18_open_id *id = filp->private_data; | |
593 | struct cx18 *cx = id->cx; | |
594 | struct cx18_stream *s = &cx->streams[id->type]; | |
595 | ||
596 | CX18_DEBUG_IOCTL("close() of %s\n", s->name); | |
597 | ||
598 | v4l2_prio_close(&cx->prio, &id->prio); | |
599 | ||
600 | /* Easy case first: this stream was never claimed by us */ | |
601 | if (s->id != id->open_id) { | |
602 | kfree(id); | |
603 | return 0; | |
604 | } | |
605 | ||
606 | /* 'Unclaim' this stream */ | |
607 | ||
608 | /* Stop radio */ | |
609 | mutex_lock(&cx->serialize_lock); | |
610 | if (id->type == CX18_ENC_STREAM_TYPE_RAD) { | |
611 | /* Closing radio device, return to TV mode */ | |
612 | cx18_mute(cx); | |
613 | /* Mark that the radio is no longer in use */ | |
614 | clear_bit(CX18_F_I_RADIO_USER, &cx->i_flags); | |
615 | /* Switch tuner to TV */ | |
f41737ec | 616 | cx18_call_all(cx, core, s_std, cx->std); |
1c1e45d1 HV |
617 | /* Select correct audio input (i.e. TV tuner or Line in) */ |
618 | cx18_audio_set_io(cx); | |
31554ae5 | 619 | if (atomic_read(&cx->ana_capturing) > 0) { |
1c1e45d1 HV |
620 | /* Undo video mute */ |
621 | cx18_vapi(cx, CX18_CPU_SET_VIDEO_MUTE, 2, s->handle, | |
622 | cx->params.video_mute | | |
623 | (cx->params.video_mute_yuv << 8)); | |
624 | } | |
625 | /* Done! Unmute and continue. */ | |
626 | cx18_unmute(cx); | |
627 | cx18_release_stream(s); | |
628 | } else { | |
629 | cx18_stop_capture(id, 0); | |
630 | } | |
631 | kfree(id); | |
632 | mutex_unlock(&cx->serialize_lock); | |
633 | return 0; | |
634 | } | |
635 | ||
636 | static int cx18_serialized_open(struct cx18_stream *s, struct file *filp) | |
637 | { | |
638 | struct cx18 *cx = s->cx; | |
639 | struct cx18_open_id *item; | |
640 | ||
641 | CX18_DEBUG_FILE("open %s\n", s->name); | |
642 | ||
643 | /* Allocate memory */ | |
644 | item = kmalloc(sizeof(struct cx18_open_id), GFP_KERNEL); | |
645 | if (NULL == item) { | |
646 | CX18_DEBUG_WARN("nomem on v4l2 open\n"); | |
647 | return -ENOMEM; | |
648 | } | |
649 | item->cx = cx; | |
650 | item->type = s->type; | |
651 | v4l2_prio_open(&cx->prio, &item->prio); | |
652 | ||
653 | item->open_id = cx->open_id++; | |
654 | filp->private_data = item; | |
655 | ||
656 | if (item->type == CX18_ENC_STREAM_TYPE_RAD) { | |
657 | /* Try to claim this stream */ | |
658 | if (cx18_claim_stream(item, item->type)) { | |
659 | /* No, it's already in use */ | |
660 | kfree(item); | |
661 | return -EBUSY; | |
662 | } | |
663 | ||
664 | if (!test_bit(CX18_F_I_RADIO_USER, &cx->i_flags)) { | |
31554ae5 | 665 | if (atomic_read(&cx->ana_capturing) > 0) { |
1c1e45d1 HV |
666 | /* switching to radio while capture is |
667 | in progress is not polite */ | |
668 | cx18_release_stream(s); | |
669 | kfree(item); | |
670 | return -EBUSY; | |
671 | } | |
672 | } | |
673 | ||
674 | /* Mark that the radio is being used. */ | |
675 | set_bit(CX18_F_I_RADIO_USER, &cx->i_flags); | |
676 | /* We have the radio */ | |
677 | cx18_mute(cx); | |
678 | /* Switch tuner to radio */ | |
ff2a2001 | 679 | cx18_call_all(cx, tuner, s_radio); |
1c1e45d1 HV |
680 | /* Select the correct audio input (i.e. radio tuner) */ |
681 | cx18_audio_set_io(cx); | |
682 | /* Done! Unmute and continue. */ | |
683 | cx18_unmute(cx); | |
684 | } | |
685 | return 0; | |
686 | } | |
687 | ||
bec43661 | 688 | int cx18_v4l2_open(struct file *filp) |
1c1e45d1 | 689 | { |
5811cf99 AW |
690 | int res; |
691 | struct video_device *video_dev = video_devdata(filp); | |
692 | struct cx18_stream *s = video_get_drvdata(video_dev); | |
693 | struct cx18 *cx = s->cx;; | |
1c1e45d1 HV |
694 | |
695 | mutex_lock(&cx->serialize_lock); | |
696 | if (cx18_init_on_first_open(cx)) { | |
5811cf99 AW |
697 | CX18_ERR("Failed to initialize on minor %d\n", |
698 | video_dev->minor); | |
1c1e45d1 HV |
699 | mutex_unlock(&cx->serialize_lock); |
700 | return -ENXIO; | |
701 | } | |
702 | res = cx18_serialized_open(s, filp); | |
703 | mutex_unlock(&cx->serialize_lock); | |
704 | return res; | |
705 | } | |
706 | ||
707 | void cx18_mute(struct cx18 *cx) | |
708 | { | |
d3c5e707 AW |
709 | u32 h; |
710 | if (atomic_read(&cx->ana_capturing)) { | |
711 | h = cx18_find_handle(cx); | |
712 | if (h != CX18_INVALID_TASK_HANDLE) | |
713 | cx18_vapi(cx, CX18_CPU_SET_AUDIO_MUTE, 2, h, 1); | |
714 | else | |
715 | CX18_ERR("Can't find valid task handle for mute\n"); | |
716 | } | |
1c1e45d1 HV |
717 | CX18_DEBUG_INFO("Mute\n"); |
718 | } | |
719 | ||
720 | void cx18_unmute(struct cx18 *cx) | |
721 | { | |
d3c5e707 | 722 | u32 h; |
31554ae5 | 723 | if (atomic_read(&cx->ana_capturing)) { |
d3c5e707 AW |
724 | h = cx18_find_handle(cx); |
725 | if (h != CX18_INVALID_TASK_HANDLE) { | |
726 | cx18_msleep_timeout(100, 0); | |
727 | cx18_vapi(cx, CX18_CPU_SET_MISC_PARAMETERS, 2, h, 12); | |
728 | cx18_vapi(cx, CX18_CPU_SET_AUDIO_MUTE, 2, h, 0); | |
729 | } else | |
730 | CX18_ERR("Can't find valid task handle for unmute\n"); | |
1c1e45d1 HV |
731 | } |
732 | CX18_DEBUG_INFO("Unmute\n"); | |
733 | } |