Alexandre Lision | 8af73cb | 2013-12-10 14:11:20 -0500 | [diff] [blame] | 1 | /* $Id$ */ |
| 2 | /* |
| 3 | * Copyright (C) 2008-2011 Teluu Inc. (http://www.teluu.com) |
| 4 | * |
| 5 | * This program is free software; you can redistribute it and/or modify |
| 6 | * it under the terms of the GNU General Public License as published by |
| 7 | * the Free Software Foundation; either version 2 of the License, or |
| 8 | * (at your option) any later version. |
| 9 | * |
| 10 | * This program is distributed in the hope that it will be useful, |
| 11 | * but WITHOUT ANY WARRANTY; without even the implied warranty of |
| 12 | * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the |
| 13 | * GNU General Public License for more details. |
| 14 | * |
| 15 | * You should have received a copy of the GNU General Public License |
| 16 | * along with this program; if not, write to the Free Software |
| 17 | * Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA |
| 18 | */ |
| 19 | #include <pjmedia-videodev/videodev_imp.h> |
| 20 | #include <pjmedia/errno.h> |
| 21 | #include <pj/assert.h> |
| 22 | #include <pj/errno.h> |
| 23 | #include <pj/file_access.h> |
| 24 | #include <pj/log.h> |
| 25 | #include <pj/os.h> |
| 26 | #include <pj/rand.h> |
| 27 | |
| 28 | #if PJMEDIA_VIDEO_DEV_HAS_V4L2 |
| 29 | |
| 30 | #include <linux/videodev2.h> |
| 31 | #include <libv4l2.h> |
| 32 | #include <fcntl.h> |
| 33 | #include <errno.h> |
| 34 | #include <sys/mman.h> |
| 35 | |
| 36 | #define THIS_FILE "v4l2_dev.c" |
| 37 | #define DRIVER_NAME "v4l2" |
| 38 | #define V4L2_MAX_DEVS 4 |
| 39 | #define DEFAULT_WIDTH 640 |
| 40 | #define DEFAULT_HEIGHT 480 |
| 41 | #define DEFAULT_FPS 25 |
| 42 | #define DEFAULT_CLOCK_RATE 90000 |
| 43 | #define INVALID_FD -1 |
| 44 | #define BUFFER_CNT 2 |
| 45 | #define MAX_IOCTL_RETRY 20 |
| 46 | |
| 47 | |
| 48 | /* mapping between pjmedia_fmt_id and v4l2 pixel format */ |
| 49 | typedef struct vid4lin_fmt_map |
| 50 | { |
| 51 | pj_uint32_t pjmedia_fmt_id; |
| 52 | pj_uint32_t v4l2_fmt_id; |
| 53 | } vid4lin_fmt_map; |
| 54 | |
| 55 | /* I/O type being used */ |
| 56 | enum vid4lin_io_type |
| 57 | { |
| 58 | IO_TYPE_NONE, |
| 59 | IO_TYPE_READ, |
| 60 | IO_TYPE_MMAP, |
| 61 | IO_TYPE_MMAP_USER |
| 62 | }; |
| 63 | |
| 64 | /* descriptor for each mmap-ed buffer */ |
| 65 | typedef struct vid4lin_buffer |
| 66 | { |
| 67 | void *start; |
| 68 | size_t length; |
| 69 | } vid4lin_buffer; |
| 70 | |
| 71 | /* v4l2 device info */ |
| 72 | typedef struct vid4lin_dev_info |
| 73 | { |
| 74 | pjmedia_vid_dev_info info; |
| 75 | char dev_name[32]; |
| 76 | struct v4l2_capability v4l2_cap; |
| 77 | } vid4lin_dev_info; |
| 78 | |
| 79 | /* v4l2 factory */ |
| 80 | typedef struct vid4lin_factory |
| 81 | { |
| 82 | pjmedia_vid_dev_factory base; |
| 83 | pj_pool_t *pool; |
| 84 | pj_pool_t *dev_pool; |
| 85 | pj_pool_factory *pf; |
| 86 | |
| 87 | unsigned dev_count; |
| 88 | vid4lin_dev_info *dev_info; |
| 89 | } vid4lin_factory; |
| 90 | |
| 91 | /* Video stream. */ |
| 92 | typedef struct vid4lin_stream |
| 93 | { |
| 94 | pjmedia_vid_dev_stream base; /**< Base stream */ |
| 95 | pjmedia_vid_dev_param param; /**< Settings */ |
| 96 | pj_pool_t *pool; /**< Memory pool. */ |
| 97 | |
| 98 | int fd; /**< Video fd. */ |
| 99 | char name[64]; /**< Name for log */ |
| 100 | enum vid4lin_io_type io_type; /**< I/O method. */ |
| 101 | unsigned buf_cnt; /**< MMap buf cnt. */ |
| 102 | vid4lin_buffer *buffers; /**< MMap buffers. */ |
| 103 | pj_time_val start_time; /**< Time when started */ |
| 104 | |
| 105 | pjmedia_vid_dev_cb vid_cb; /**< Stream callback */ |
| 106 | void *user_data; /**< Application data */ |
| 107 | } vid4lin_stream; |
| 108 | |
| 109 | /* Use this to convert between pjmedia_format_id and V4L2 fourcc */ |
| 110 | static vid4lin_fmt_map v4l2_fmt_maps[] = |
| 111 | { |
| 112 | { PJMEDIA_FORMAT_RGB24, V4L2_PIX_FMT_BGR24 }, |
| 113 | { PJMEDIA_FORMAT_RGBA, V4L2_PIX_FMT_BGR32 }, |
| 114 | { PJMEDIA_FORMAT_RGB32, V4L2_PIX_FMT_BGR32 }, |
| 115 | { PJMEDIA_FORMAT_AYUV, V4L2_PIX_FMT_YUV32 }, |
| 116 | { PJMEDIA_FORMAT_YUY2, V4L2_PIX_FMT_YUYV }, |
| 117 | { PJMEDIA_FORMAT_UYVY, V4L2_PIX_FMT_UYVY } |
| 118 | }; |
| 119 | |
| 120 | /* Prototypes */ |
| 121 | static pj_status_t vid4lin_factory_init(pjmedia_vid_dev_factory *f); |
| 122 | static pj_status_t vid4lin_factory_destroy(pjmedia_vid_dev_factory *f); |
| 123 | static pj_status_t vid4lin_factory_refresh(pjmedia_vid_dev_factory *f); |
| 124 | static unsigned vid4lin_factory_get_dev_count(pjmedia_vid_dev_factory *f); |
| 125 | static pj_status_t vid4lin_factory_get_dev_info(pjmedia_vid_dev_factory *f, |
| 126 | unsigned index, |
| 127 | pjmedia_vid_dev_info *info); |
| 128 | static pj_status_t vid4lin_factory_default_param(pj_pool_t *pool, |
| 129 | pjmedia_vid_dev_factory *f, |
| 130 | unsigned index, |
| 131 | pjmedia_vid_dev_param *param); |
| 132 | static pj_status_t vid4lin_factory_create_stream(pjmedia_vid_dev_factory *f, |
| 133 | pjmedia_vid_dev_param *prm, |
| 134 | const pjmedia_vid_dev_cb *cb, |
| 135 | void *user_data, |
| 136 | pjmedia_vid_dev_stream **p); |
| 137 | |
| 138 | static pj_status_t vid4lin_stream_get_param(pjmedia_vid_dev_stream *strm, |
| 139 | pjmedia_vid_dev_param *param); |
| 140 | static pj_status_t vid4lin_stream_get_cap(pjmedia_vid_dev_stream *strm, |
| 141 | pjmedia_vid_dev_cap cap, |
| 142 | void *value); |
| 143 | static pj_status_t vid4lin_stream_set_cap(pjmedia_vid_dev_stream *strm, |
| 144 | pjmedia_vid_dev_cap cap, |
| 145 | const void *value); |
| 146 | static pj_status_t vid4lin_stream_get_frame(pjmedia_vid_dev_stream *strm, |
| 147 | pjmedia_frame *frame); |
| 148 | static pj_status_t vid4lin_stream_start(pjmedia_vid_dev_stream *strm); |
| 149 | static pj_status_t vid4lin_stream_stop(pjmedia_vid_dev_stream *strm); |
| 150 | static pj_status_t vid4lin_stream_destroy(pjmedia_vid_dev_stream *strm); |
| 151 | |
| 152 | /* Operations */ |
| 153 | static pjmedia_vid_dev_factory_op factory_op = |
| 154 | { |
| 155 | &vid4lin_factory_init, |
| 156 | &vid4lin_factory_destroy, |
| 157 | &vid4lin_factory_get_dev_count, |
| 158 | &vid4lin_factory_get_dev_info, |
| 159 | &vid4lin_factory_default_param, |
| 160 | &vid4lin_factory_create_stream, |
| 161 | &vid4lin_factory_refresh |
| 162 | }; |
| 163 | |
| 164 | static pjmedia_vid_dev_stream_op stream_op = |
| 165 | { |
| 166 | &vid4lin_stream_get_param, |
| 167 | &vid4lin_stream_get_cap, |
| 168 | &vid4lin_stream_set_cap, |
| 169 | &vid4lin_stream_start, |
| 170 | &vid4lin_stream_get_frame, |
| 171 | NULL, |
| 172 | &vid4lin_stream_stop, |
| 173 | &vid4lin_stream_destroy |
| 174 | }; |
| 175 | |
| 176 | |
| 177 | /**************************************************************************** |
| 178 | * Factory operations |
| 179 | */ |
| 180 | /* |
| 181 | * Factory creation function. |
| 182 | */ |
| 183 | pjmedia_vid_dev_factory* pjmedia_v4l2_factory(pj_pool_factory *pf) |
| 184 | { |
| 185 | vid4lin_factory *f; |
| 186 | pj_pool_t *pool; |
| 187 | |
| 188 | pool = pj_pool_create(pf, DRIVER_NAME, 512, 512, NULL); |
| 189 | f = PJ_POOL_ZALLOC_T(pool, vid4lin_factory); |
| 190 | f->pf = pf; |
| 191 | f->pool = pool; |
| 192 | f->base.op = &factory_op; |
| 193 | |
| 194 | return &f->base; |
| 195 | } |
| 196 | |
| 197 | /* util: ioctl that tries harder. */ |
| 198 | static pj_status_t xioctl(int fh, int request, void *arg) |
| 199 | { |
| 200 | enum { RETRY = MAX_IOCTL_RETRY }; |
| 201 | int r, c=0; |
| 202 | |
| 203 | do { |
| 204 | r = v4l2_ioctl(fh, request, arg); |
| 205 | } while (r==-1 && c++<RETRY && ((errno==EINTR) || (errno==EAGAIN))); |
| 206 | |
| 207 | return (r == -1) ? pj_get_os_error() : PJ_SUCCESS; |
| 208 | } |
| 209 | |
| 210 | /* Scan V4L2 devices */ |
| 211 | static pj_status_t v4l2_scan_devs(vid4lin_factory *f) |
| 212 | { |
| 213 | vid4lin_dev_info vdi[V4L2_MAX_DEVS]; |
| 214 | char dev_name[32]; |
| 215 | unsigned i, old_count; |
| 216 | pj_status_t status; |
| 217 | |
| 218 | if (f->dev_pool) { |
| 219 | pj_pool_release(f->dev_pool); |
| 220 | f->dev_pool = NULL; |
| 221 | } |
| 222 | |
| 223 | pj_bzero(vdi, sizeof(vdi)); |
| 224 | old_count = f->dev_count; |
| 225 | f->dev_count = 0; |
| 226 | f->dev_pool = pj_pool_create(f->pf, DRIVER_NAME, 500, 500, NULL); |
| 227 | |
| 228 | for (i=0; i<V4L2_MAX_DEVS && f->dev_count < V4L2_MAX_DEVS; ++i) { |
| 229 | int fd; |
| 230 | vid4lin_dev_info *pdi; |
| 231 | pj_uint32_t fmt_cap[8]; |
| 232 | int j, fmt_cnt=0; |
| 233 | |
| 234 | pdi = &vdi[f->dev_count]; |
| 235 | |
| 236 | snprintf(dev_name, sizeof(dev_name), "/dev/video%d", i); |
| 237 | if (!pj_file_exists(dev_name)) |
| 238 | continue; |
| 239 | |
| 240 | fd = v4l2_open(dev_name, O_RDWR, 0); |
| 241 | if (fd == -1) |
| 242 | continue; |
| 243 | |
| 244 | status = xioctl(fd, VIDIOC_QUERYCAP, &pdi->v4l2_cap); |
| 245 | if (status != PJ_SUCCESS) { |
| 246 | PJ_PERROR(4,(THIS_FILE, status, "Error querying %s", dev_name)); |
| 247 | v4l2_close(fd); |
| 248 | continue; |
| 249 | } |
| 250 | |
| 251 | if ((pdi->v4l2_cap.capabilities & V4L2_CAP_VIDEO_CAPTURE) == 0) { |
| 252 | v4l2_close(fd); |
| 253 | continue; |
| 254 | } |
| 255 | |
| 256 | PJ_LOG(5,(THIS_FILE, "Found capture device %s", pdi->v4l2_cap.card)); |
| 257 | PJ_LOG(5,(THIS_FILE, " Enumerating formats:")); |
| 258 | for (j=0; fmt_cnt<PJ_ARRAY_SIZE(fmt_cap); ++j) { |
| 259 | struct v4l2_fmtdesc fdesc; |
| 260 | unsigned k; |
| 261 | |
| 262 | pj_bzero(&fdesc, sizeof(fdesc)); |
| 263 | fdesc.index = j; |
| 264 | fdesc.type = V4L2_BUF_TYPE_VIDEO_CAPTURE; |
| 265 | |
| 266 | status = xioctl(fd, VIDIOC_ENUM_FMT, &fdesc); |
| 267 | if (status != PJ_SUCCESS) |
| 268 | break; |
| 269 | |
| 270 | for (k=0; k<PJ_ARRAY_SIZE(v4l2_fmt_maps); ++k) { |
| 271 | if (v4l2_fmt_maps[k].v4l2_fmt_id == fdesc.pixelformat) { |
| 272 | fmt_cap[fmt_cnt++] = v4l2_fmt_maps[k].pjmedia_fmt_id; |
| 273 | PJ_LOG(5,(THIS_FILE, " Supported: %s", |
| 274 | fdesc.description)); |
| 275 | break; |
| 276 | } |
| 277 | } |
| 278 | if (k==PJ_ARRAY_SIZE(v4l2_fmt_maps)) { |
| 279 | PJ_LOG(5,(THIS_FILE, " Unsupported: %s", fdesc.description)); |
| 280 | } |
| 281 | } |
| 282 | |
| 283 | v4l2_close(fd); |
| 284 | |
| 285 | if (fmt_cnt==0) { |
| 286 | PJ_LOG(5,(THIS_FILE, " Found no common format")); |
| 287 | continue; |
| 288 | } |
| 289 | |
| 290 | strncpy(pdi->dev_name, dev_name, sizeof(pdi->dev_name)); |
| 291 | pdi->dev_name[sizeof(pdi->dev_name)-1] = '\0'; |
| 292 | strncpy(pdi->info.name, (char*)pdi->v4l2_cap.card, |
| 293 | sizeof(pdi->info.name)); |
| 294 | pdi->info.name[sizeof(pdi->info.name)-1] = '\0'; |
| 295 | strncpy(pdi->info.driver, DRIVER_NAME, sizeof(pdi->info.driver)); |
| 296 | pdi->info.driver[sizeof(pdi->info.driver)-1] = '\0'; |
| 297 | pdi->info.dir = PJMEDIA_DIR_CAPTURE; |
| 298 | pdi->info.has_callback = PJ_FALSE; |
| 299 | pdi->info.caps = PJMEDIA_VID_DEV_CAP_FORMAT; |
| 300 | |
| 301 | pdi->info.fmt_cnt = fmt_cnt; |
| 302 | for (j=0; j<fmt_cnt; ++j) { |
| 303 | pjmedia_format_init_video(&pdi->info.fmt[j], |
| 304 | fmt_cap[j], |
| 305 | DEFAULT_WIDTH, |
| 306 | DEFAULT_HEIGHT, |
| 307 | DEFAULT_FPS, 1); |
| 308 | } |
| 309 | if (j < fmt_cnt) |
| 310 | continue; |
| 311 | |
| 312 | f->dev_count++; |
| 313 | } |
| 314 | |
| 315 | if (f->dev_count == 0) |
| 316 | return PJ_SUCCESS; |
| 317 | |
| 318 | if (f->dev_count > old_count || f->dev_info == NULL) { |
| 319 | f->dev_info = (vid4lin_dev_info*) |
| 320 | pj_pool_calloc(f->dev_pool, |
| 321 | f->dev_count, |
| 322 | sizeof(vid4lin_dev_info)); |
| 323 | } |
| 324 | pj_memcpy(f->dev_info, vdi, f->dev_count * sizeof(vid4lin_dev_info)); |
| 325 | |
| 326 | return PJ_SUCCESS; |
| 327 | } |
| 328 | |
| 329 | |
| 330 | /* API: init factory */ |
| 331 | static pj_status_t vid4lin_factory_init(pjmedia_vid_dev_factory *f) |
| 332 | { |
| 333 | return vid4lin_factory_refresh(f); |
| 334 | } |
| 335 | |
| 336 | /* API: destroy factory */ |
| 337 | static pj_status_t vid4lin_factory_destroy(pjmedia_vid_dev_factory *f) |
| 338 | { |
| 339 | vid4lin_factory *cf = (vid4lin_factory*)f; |
| 340 | pj_pool_t *pool = cf->pool; |
| 341 | |
| 342 | if (cf->dev_pool) |
| 343 | pj_pool_release(cf->dev_pool); |
| 344 | if (cf->pool) { |
| 345 | cf->pool = NULL; |
| 346 | pj_pool_release(pool); |
| 347 | } |
| 348 | |
| 349 | return PJ_SUCCESS; |
| 350 | } |
| 351 | |
| 352 | /* API: refresh the list of devices */ |
| 353 | static pj_status_t vid4lin_factory_refresh(pjmedia_vid_dev_factory *f) |
| 354 | { |
| 355 | vid4lin_factory *cf = (vid4lin_factory*)f; |
| 356 | pj_status_t status; |
| 357 | |
| 358 | status = v4l2_scan_devs(cf); |
| 359 | if (status != PJ_SUCCESS) |
| 360 | return status; |
| 361 | |
| 362 | PJ_LOG(4, (THIS_FILE, "Video4Linux2 has %d devices", |
| 363 | cf->dev_count)); |
| 364 | |
| 365 | return PJ_SUCCESS; |
| 366 | } |
| 367 | |
| 368 | /* API: get number of devices */ |
| 369 | static unsigned vid4lin_factory_get_dev_count(pjmedia_vid_dev_factory *f) |
| 370 | { |
| 371 | vid4lin_factory *cf = (vid4lin_factory*)f; |
| 372 | return cf->dev_count; |
| 373 | } |
| 374 | |
| 375 | /* API: get device info */ |
| 376 | static pj_status_t vid4lin_factory_get_dev_info(pjmedia_vid_dev_factory *f, |
| 377 | unsigned index, |
| 378 | pjmedia_vid_dev_info *info) |
| 379 | { |
| 380 | vid4lin_factory *cf = (vid4lin_factory*)f; |
| 381 | |
| 382 | PJ_ASSERT_RETURN(index < cf->dev_count, PJMEDIA_EVID_INVDEV); |
| 383 | |
| 384 | pj_memcpy(info, &cf->dev_info[index].info, sizeof(*info)); |
| 385 | |
| 386 | return PJ_SUCCESS; |
| 387 | } |
| 388 | |
| 389 | /* API: create default device parameter */ |
| 390 | static pj_status_t vid4lin_factory_default_param(pj_pool_t *pool, |
| 391 | pjmedia_vid_dev_factory *f, |
| 392 | unsigned index, |
| 393 | pjmedia_vid_dev_param *param) |
| 394 | { |
| 395 | vid4lin_factory *cf = (vid4lin_factory*)f; |
| 396 | |
| 397 | PJ_ASSERT_RETURN(index < cf->dev_count, PJMEDIA_EVID_INVDEV); |
| 398 | |
| 399 | pj_bzero(param, sizeof(*param)); |
| 400 | param->dir = PJMEDIA_DIR_CAPTURE; |
| 401 | param->cap_id = index; |
| 402 | param->rend_id = PJMEDIA_VID_INVALID_DEV; |
| 403 | param->flags = PJMEDIA_VID_DEV_CAP_FORMAT; |
| 404 | param->clock_rate = DEFAULT_CLOCK_RATE; |
| 405 | pjmedia_format_copy(¶m->fmt, &cf->dev_info[index].info.fmt[0]); |
| 406 | |
| 407 | return PJ_SUCCESS; |
| 408 | } |
| 409 | |
| 410 | static vid4lin_fmt_map* get_v4l2_format_info(pjmedia_format_id id) |
| 411 | { |
| 412 | unsigned i; |
| 413 | |
| 414 | for (i = 0; i < PJ_ARRAY_SIZE(v4l2_fmt_maps); i++) { |
| 415 | if (v4l2_fmt_maps[i].pjmedia_fmt_id == id) |
| 416 | return &v4l2_fmt_maps[i]; |
| 417 | } |
| 418 | |
| 419 | return NULL; |
| 420 | } |
| 421 | |
| 422 | /* util: setup format */ |
| 423 | static pj_status_t vid4lin_stream_init_fmt(vid4lin_stream *stream, |
| 424 | const pjmedia_vid_dev_param *param, |
| 425 | pj_uint32_t pix_fmt) |
| 426 | { |
| 427 | pjmedia_video_format_detail *vfd; |
| 428 | struct v4l2_format v4l2_fmt; |
| 429 | pj_status_t status; |
| 430 | |
| 431 | vfd = pjmedia_format_get_video_format_detail(¶m->fmt, PJ_TRUE); |
| 432 | if (vfd == NULL) |
| 433 | return PJMEDIA_EVID_BADFORMAT; |
| 434 | |
| 435 | pj_bzero(&v4l2_fmt, sizeof(v4l2_fmt)); |
| 436 | v4l2_fmt.type = V4L2_BUF_TYPE_VIDEO_CAPTURE; |
| 437 | v4l2_fmt.fmt.pix.width = vfd->size.w; |
| 438 | v4l2_fmt.fmt.pix.height = vfd->size.h; |
| 439 | v4l2_fmt.fmt.pix.pixelformat = pix_fmt; |
| 440 | v4l2_fmt.fmt.pix.field = V4L2_FIELD_INTERLACED; |
| 441 | status = xioctl(stream->fd, VIDIOC_S_FMT, &v4l2_fmt); |
| 442 | if (status != PJ_SUCCESS) |
| 443 | return status; |
| 444 | |
| 445 | if (v4l2_fmt.fmt.pix.pixelformat != pix_fmt) { |
| 446 | status = PJMEDIA_EVID_BADFORMAT; |
| 447 | return status; |
| 448 | } |
| 449 | |
| 450 | if ((v4l2_fmt.fmt.pix.width != vfd->size.w) || |
| 451 | (v4l2_fmt.fmt.pix.height != vfd->size.h)) |
| 452 | { |
| 453 | /* Size has changed */ |
| 454 | vfd->size.w = v4l2_fmt.fmt.pix.width; |
| 455 | vfd->size.h = v4l2_fmt.fmt.pix.height; |
| 456 | } |
| 457 | |
| 458 | return PJ_SUCCESS; |
| 459 | } |
| 460 | |
| 461 | /* Util: initiate v4l2 streaming via mmap */ |
| 462 | static pj_status_t vid4lin_stream_init_streaming(vid4lin_stream *stream) |
| 463 | { |
| 464 | struct v4l2_requestbuffers req; |
| 465 | unsigned i; |
| 466 | pj_status_t status; |
| 467 | |
| 468 | pj_bzero(&req, sizeof(req)); |
| 469 | req.count = BUFFER_CNT; |
| 470 | req.type = V4L2_BUF_TYPE_VIDEO_CAPTURE; |
| 471 | req.memory = V4L2_MEMORY_MMAP; |
| 472 | status = xioctl(stream->fd, VIDIOC_REQBUFS, &req); |
| 473 | if (status != PJ_SUCCESS) |
| 474 | return status; |
| 475 | |
| 476 | stream->buffers = pj_pool_calloc(stream->pool, req.count, |
| 477 | sizeof(*stream->buffers)); |
| 478 | stream->buf_cnt = 0; |
| 479 | |
| 480 | for (i = 0; i < req.count; ++i) { |
| 481 | struct v4l2_buffer buf; |
| 482 | |
| 483 | pj_bzero(&buf, sizeof(buf)); |
| 484 | |
| 485 | buf.type = V4L2_BUF_TYPE_VIDEO_CAPTURE; |
| 486 | buf.memory = V4L2_MEMORY_MMAP; |
| 487 | buf.index = i; |
| 488 | |
| 489 | status = xioctl(stream->fd, VIDIOC_QUERYBUF, &buf); |
| 490 | if (status != PJ_SUCCESS) |
| 491 | goto on_error; |
| 492 | |
| 493 | stream->buffers[i].length = buf.length; |
| 494 | stream->buffers[i].start = v4l2_mmap(NULL, buf.length, |
| 495 | PROT_READ | PROT_WRITE, |
| 496 | MAP_SHARED, stream->fd, |
| 497 | buf.m.offset); |
| 498 | |
| 499 | if (MAP_FAILED == stream->buffers[i].start) { |
| 500 | status = pj_get_os_error(); |
| 501 | goto on_error; |
| 502 | } |
| 503 | |
| 504 | stream->buf_cnt++; |
| 505 | } |
| 506 | |
| 507 | PJ_LOG(5,(THIS_FILE, " mmap streaming initialized")); |
| 508 | |
| 509 | stream->io_type = IO_TYPE_MMAP; |
| 510 | return PJ_SUCCESS; |
| 511 | |
| 512 | on_error: |
| 513 | return status; |
| 514 | } |
| 515 | |
| 516 | /* init streaming with user pointer */ |
| 517 | static pj_status_t vid4lin_stream_init_streaming_user(vid4lin_stream *stream) |
| 518 | { |
| 519 | return PJ_ENOTSUP; |
| 520 | } |
| 521 | |
| 522 | /* init streaming with read() */ |
| 523 | static pj_status_t vid4lin_stream_init_read_write(vid4lin_stream *stream) |
| 524 | { |
| 525 | return PJ_ENOTSUP; |
| 526 | } |
| 527 | |
| 528 | /* API: create stream */ |
| 529 | static pj_status_t vid4lin_factory_create_stream(pjmedia_vid_dev_factory *f, |
| 530 | pjmedia_vid_dev_param *param, |
| 531 | const pjmedia_vid_dev_cb *cb, |
| 532 | void *user_data, |
| 533 | pjmedia_vid_dev_stream **p_vid_strm) |
| 534 | { |
| 535 | vid4lin_factory *cf = (vid4lin_factory*)f; |
| 536 | pj_pool_t *pool; |
| 537 | vid4lin_stream *stream; |
| 538 | vid4lin_dev_info *vdi; |
| 539 | const vid4lin_fmt_map *fmt_map; |
| 540 | const pjmedia_video_format_info *fmt_info; |
| 541 | pjmedia_video_format_detail *vfd; |
| 542 | pj_status_t status = PJ_SUCCESS; |
| 543 | |
| 544 | |
| 545 | PJ_ASSERT_RETURN(f && param && p_vid_strm, PJ_EINVAL); |
| 546 | PJ_ASSERT_RETURN(param->fmt.type == PJMEDIA_TYPE_VIDEO && |
| 547 | param->fmt.detail_type == PJMEDIA_FORMAT_DETAIL_VIDEO && |
| 548 | param->dir == PJMEDIA_DIR_CAPTURE, |
| 549 | PJ_EINVAL); |
| 550 | PJ_ASSERT_RETURN(param->cap_id >= 0 && param->cap_id < cf->dev_count, |
| 551 | PJMEDIA_EVID_INVDEV); |
| 552 | |
| 553 | fmt_info = pjmedia_get_video_format_info(NULL, param->fmt.id); |
| 554 | if (!fmt_info || (fmt_map=get_v4l2_format_info(param->fmt.id))==NULL) |
| 555 | return PJMEDIA_EVID_BADFORMAT; |
| 556 | |
| 557 | vdi = &cf->dev_info[param->cap_id]; |
| 558 | vfd = pjmedia_format_get_video_format_detail(¶m->fmt, PJ_TRUE); |
| 559 | |
| 560 | /* Create and Initialize stream descriptor */ |
| 561 | pool = pj_pool_create(cf->pf, vdi->info.name, 512, 512, NULL); |
| 562 | PJ_ASSERT_RETURN(pool != NULL, PJ_ENOMEM); |
| 563 | |
| 564 | stream = PJ_POOL_ZALLOC_T(pool, vid4lin_stream); |
| 565 | pj_memcpy(&stream->param, param, sizeof(*param)); |
| 566 | stream->pool = pool; |
| 567 | pj_memcpy(&stream->vid_cb, cb, sizeof(*cb)); |
| 568 | strncpy(stream->name, vdi->info.name, sizeof(stream->name)); |
| 569 | stream->name[sizeof(stream->name)-1] = '\0'; |
| 570 | stream->user_data = user_data; |
| 571 | stream->fd = INVALID_FD; |
| 572 | |
| 573 | stream->fd = v4l2_open(vdi->dev_name, O_RDWR, 0); |
| 574 | if (stream->fd < 0) |
| 575 | goto on_error; |
| 576 | |
| 577 | status = vid4lin_stream_init_fmt(stream, param, fmt_map->v4l2_fmt_id); |
| 578 | if (status != PJ_SUCCESS) |
| 579 | goto on_error; |
| 580 | |
| 581 | if (vdi->v4l2_cap.capabilities & V4L2_CAP_STREAMING) |
| 582 | status = vid4lin_stream_init_streaming(stream); |
| 583 | |
| 584 | if (status!=PJ_SUCCESS && vdi->v4l2_cap.capabilities & V4L2_CAP_STREAMING) |
| 585 | status = vid4lin_stream_init_streaming_user(stream); |
| 586 | |
| 587 | if (status!=PJ_SUCCESS && vdi->v4l2_cap.capabilities & V4L2_CAP_READWRITE) |
| 588 | status = vid4lin_stream_init_read_write(stream); |
| 589 | |
| 590 | if (status != PJ_SUCCESS) { |
| 591 | PJ_LOG(1,(THIS_FILE, "Error: unable to initiate I/O on %s", |
| 592 | stream->name)); |
| 593 | goto on_error; |
| 594 | } |
| 595 | |
| 596 | /* Done */ |
| 597 | stream->base.op = &stream_op; |
| 598 | *p_vid_strm = &stream->base; |
| 599 | |
| 600 | return PJ_SUCCESS; |
| 601 | |
| 602 | on_error: |
| 603 | if (status == PJ_SUCCESS) |
| 604 | status = PJ_RETURN_OS_ERROR(errno); |
| 605 | |
| 606 | vid4lin_stream_destroy(&stream->base); |
| 607 | return status; |
| 608 | } |
| 609 | |
| 610 | /* API: Get stream info. */ |
| 611 | static pj_status_t vid4lin_stream_get_param(pjmedia_vid_dev_stream *s, |
| 612 | pjmedia_vid_dev_param *pi) |
| 613 | { |
| 614 | vid4lin_stream *strm = (vid4lin_stream*)s; |
| 615 | |
| 616 | PJ_ASSERT_RETURN(strm && pi, PJ_EINVAL); |
| 617 | |
| 618 | pj_memcpy(pi, &strm->param, sizeof(*pi)); |
| 619 | |
| 620 | return PJ_SUCCESS; |
| 621 | } |
| 622 | |
| 623 | /* API: get capability */ |
| 624 | static pj_status_t vid4lin_stream_get_cap(pjmedia_vid_dev_stream *s, |
| 625 | pjmedia_vid_dev_cap cap, |
| 626 | void *pval) |
| 627 | { |
| 628 | vid4lin_stream *strm = (vid4lin_stream*)s; |
| 629 | |
| 630 | PJ_UNUSED_ARG(strm); |
| 631 | |
| 632 | PJ_ASSERT_RETURN(s && pval, PJ_EINVAL); |
| 633 | |
| 634 | if (cap==PJMEDIA_VID_DEV_CAP_INPUT_SCALE) |
| 635 | { |
| 636 | return PJMEDIA_EVID_INVCAP; |
| 637 | // return PJ_SUCCESS; |
| 638 | } else { |
| 639 | return PJMEDIA_EVID_INVCAP; |
| 640 | } |
| 641 | } |
| 642 | |
| 643 | /* API: set capability */ |
| 644 | static pj_status_t vid4lin_stream_set_cap(pjmedia_vid_dev_stream *s, |
| 645 | pjmedia_vid_dev_cap cap, |
| 646 | const void *pval) |
| 647 | { |
| 648 | vid4lin_stream *strm = (vid4lin_stream*)s; |
| 649 | |
| 650 | |
| 651 | PJ_ASSERT_RETURN(s && pval, PJ_EINVAL); |
| 652 | |
| 653 | /* |
| 654 | if (cap==PJMEDIA_VID_DEV_CAP_INPUT_SCALE) |
| 655 | { |
| 656 | return PJ_SUCCESS; |
| 657 | } |
| 658 | */ |
| 659 | PJ_UNUSED_ARG(strm); |
| 660 | PJ_UNUSED_ARG(cap); |
| 661 | PJ_UNUSED_ARG(pval); |
| 662 | |
| 663 | return PJMEDIA_EVID_INVCAP; |
| 664 | } |
| 665 | |
| 666 | /* get frame from mmap */ |
| 667 | static pj_status_t vid4lin_stream_get_frame_mmap(vid4lin_stream *stream, |
| 668 | pjmedia_frame *frame) |
| 669 | { |
| 670 | struct v4l2_buffer buf; |
| 671 | pj_time_val time; |
| 672 | pj_status_t status = PJ_SUCCESS; |
| 673 | unsigned tmp_idx; |
| 674 | |
| 675 | pj_bzero(&buf, sizeof(buf)); |
| 676 | buf.type = V4L2_BUF_TYPE_VIDEO_CAPTURE; |
| 677 | buf.memory = V4L2_MEMORY_MMAP; |
| 678 | status = xioctl(stream->fd, VIDIOC_DQBUF, &buf); |
| 679 | if (status != PJ_SUCCESS) |
| 680 | return status; |
| 681 | |
| 682 | if (frame->size < buf.bytesused) { |
| 683 | /* supplied buffer is too small */ |
| 684 | pj_assert(!"frame buffer is too small for v4l2"); |
| 685 | status = PJ_ETOOSMALL; |
| 686 | goto on_return; |
| 687 | } |
| 688 | |
| 689 | time.sec = buf.timestamp.tv_sec; |
| 690 | time.msec = buf.timestamp.tv_usec / 1000; |
| 691 | PJ_TIME_VAL_SUB(time, stream->start_time); |
| 692 | |
| 693 | frame->type = PJMEDIA_FRAME_TYPE_VIDEO; |
| 694 | frame->bit_info = 0; |
| 695 | frame->size = buf.bytesused; |
| 696 | frame->timestamp.u64 = PJ_UINT64(1) * PJ_TIME_VAL_MSEC(time) * |
| 697 | stream->param.clock_rate / PJ_UINT64(1000); |
| 698 | pj_memcpy(frame->buf, stream->buffers[buf.index].start, buf.bytesused); |
| 699 | |
| 700 | on_return: |
| 701 | tmp_idx = buf.index; |
| 702 | pj_bzero(&buf, sizeof(buf)); |
| 703 | buf.type = V4L2_BUF_TYPE_VIDEO_CAPTURE; |
| 704 | buf.memory = V4L2_MEMORY_MMAP; |
| 705 | buf.index = tmp_idx; |
| 706 | xioctl(stream->fd, VIDIOC_QBUF, &buf); |
| 707 | |
| 708 | return status; |
| 709 | } |
| 710 | |
| 711 | /* API: Get frame from stream */ |
| 712 | static pj_status_t vid4lin_stream_get_frame(pjmedia_vid_dev_stream *strm, |
| 713 | pjmedia_frame *frame) |
| 714 | { |
| 715 | vid4lin_stream *stream = (vid4lin_stream*)strm; |
| 716 | |
| 717 | if (stream->io_type == IO_TYPE_MMAP) |
| 718 | return vid4lin_stream_get_frame_mmap(stream, frame); |
| 719 | else { |
| 720 | pj_assert(!"Unsupported i/o type"); |
| 721 | return PJ_EINVALIDOP; |
| 722 | } |
| 723 | } |
| 724 | |
| 725 | /* API: Start stream. */ |
| 726 | static pj_status_t vid4lin_stream_start(pjmedia_vid_dev_stream *strm) |
| 727 | { |
| 728 | vid4lin_stream *stream = (vid4lin_stream*)strm; |
| 729 | struct v4l2_buffer buf; |
| 730 | enum v4l2_buf_type type; |
| 731 | unsigned i; |
| 732 | pj_status_t status; |
| 733 | |
| 734 | PJ_ASSERT_RETURN(stream->fd != -1, PJ_EINVALIDOP); |
| 735 | |
| 736 | PJ_LOG(4, (THIS_FILE, "Starting v4l2 video stream %s", stream->name)); |
| 737 | |
| 738 | pj_gettimeofday(&stream->start_time); |
| 739 | |
| 740 | for (i = 0; i < stream->buf_cnt; ++i) { |
| 741 | pj_bzero(&buf, sizeof(buf)); |
| 742 | buf.type = V4L2_BUF_TYPE_VIDEO_CAPTURE; |
| 743 | buf.memory = V4L2_MEMORY_MMAP; |
| 744 | buf.index = i; |
| 745 | status = xioctl(stream->fd, VIDIOC_QBUF, &buf); |
| 746 | if (status != PJ_SUCCESS) |
| 747 | goto on_error; |
| 748 | } |
| 749 | type = V4L2_BUF_TYPE_VIDEO_CAPTURE; |
| 750 | |
| 751 | status = xioctl(stream->fd, VIDIOC_STREAMON, &type); |
| 752 | if (status != PJ_SUCCESS) |
| 753 | goto on_error; |
| 754 | |
| 755 | return PJ_SUCCESS; |
| 756 | |
| 757 | on_error: |
| 758 | if (i > 0) { |
| 759 | /* Dequeue already enqueued buffers. Can we do this while streaming |
| 760 | * is not started? |
| 761 | */ |
| 762 | unsigned n = i; |
| 763 | for (i=0; i<n; ++i) { |
| 764 | pj_bzero(&buf, sizeof(buf)); |
| 765 | buf.type = V4L2_BUF_TYPE_VIDEO_CAPTURE; |
| 766 | buf.memory = V4L2_MEMORY_MMAP; |
| 767 | xioctl(stream->fd, VIDIOC_DQBUF, &buf); |
| 768 | } |
| 769 | } |
| 770 | return status; |
| 771 | } |
| 772 | |
| 773 | /* API: Stop stream. */ |
| 774 | static pj_status_t vid4lin_stream_stop(pjmedia_vid_dev_stream *strm) |
| 775 | { |
| 776 | vid4lin_stream *stream = (vid4lin_stream*)strm; |
| 777 | enum v4l2_buf_type type; |
| 778 | pj_status_t status; |
| 779 | |
| 780 | if (stream->fd < 0) |
| 781 | return PJ_SUCCESS; |
| 782 | |
| 783 | PJ_LOG(4, (THIS_FILE, "Stopping v4l2 video stream %s", stream->name)); |
| 784 | |
| 785 | type = V4L2_BUF_TYPE_VIDEO_CAPTURE; |
| 786 | status = xioctl(stream->fd, VIDIOC_STREAMOFF, &type); |
| 787 | if (status != PJ_SUCCESS) |
| 788 | return status; |
| 789 | |
| 790 | return PJ_SUCCESS; |
| 791 | } |
| 792 | |
| 793 | |
| 794 | /* API: Destroy stream. */ |
| 795 | static pj_status_t vid4lin_stream_destroy(pjmedia_vid_dev_stream *strm) |
| 796 | { |
| 797 | vid4lin_stream *stream = (vid4lin_stream*)strm; |
| 798 | unsigned i; |
| 799 | |
| 800 | PJ_ASSERT_RETURN(stream != NULL, PJ_EINVAL); |
| 801 | |
| 802 | vid4lin_stream_stop(strm); |
| 803 | |
| 804 | PJ_LOG(4, (THIS_FILE, "Destroying v4l2 video stream %s", stream->name)); |
| 805 | |
| 806 | for (i=0; i<stream->buf_cnt; ++i) { |
| 807 | if (stream->buffers[i].start != MAP_FAILED) { |
| 808 | v4l2_munmap(stream->buffers[i].start, stream->buffers[i].length); |
| 809 | stream->buffers[i].start = MAP_FAILED; |
| 810 | } |
| 811 | } |
| 812 | |
| 813 | if (stream->fd >= 0) { |
| 814 | v4l2_close(stream->fd); |
| 815 | stream->fd = -1; |
| 816 | } |
| 817 | pj_pool_release(stream->pool); |
| 818 | |
| 819 | return PJ_SUCCESS; |
| 820 | } |
| 821 | |
| 822 | #endif /* PJMEDIA_VIDEO_DEV_HAS_V4L2 */ |