Tristan Matthews | 0a329cc | 2013-07-17 13:20:14 -0400 | [diff] [blame] | 1 | /* $Id: videodev.c 4016 2012-04-04 05:05:50Z bennylp $ */ |
| 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 <pj/assert.h> |
| 21 | #include <pj/errno.h> |
| 22 | #include <pj/log.h> |
| 23 | #include <pj/pool.h> |
| 24 | #include <pj/string.h> |
| 25 | |
| 26 | |
| 27 | #if defined(PJMEDIA_HAS_VIDEO) && (PJMEDIA_HAS_VIDEO != 0) |
| 28 | |
| 29 | |
| 30 | #define THIS_FILE "videodev.c" |
| 31 | |
| 32 | #define DEFINE_CAP(name, info) {name, info} |
| 33 | |
| 34 | /* Capability names */ |
| 35 | static struct cap_info |
| 36 | { |
| 37 | const char *name; |
| 38 | const char *info; |
| 39 | } cap_infos[] = |
| 40 | { |
| 41 | DEFINE_CAP("format", "Video format"), |
| 42 | DEFINE_CAP("scale", "Input dimension"), |
| 43 | DEFINE_CAP("window", "Window handle"), |
| 44 | DEFINE_CAP("resize", "Renderer resize"), |
| 45 | DEFINE_CAP("position", "Renderer position"), |
| 46 | DEFINE_CAP("hide", "Renderer hide"), |
| 47 | DEFINE_CAP("preview", "Input preview"), |
| 48 | DEFINE_CAP("orientation", "Video orientation"), |
| 49 | DEFINE_CAP("switch", "Switch device"), |
| 50 | DEFINE_CAP("wndflags", "Window flags") |
| 51 | }; |
| 52 | |
| 53 | |
| 54 | /* |
| 55 | * The device index seen by application and driver is different. |
| 56 | * |
| 57 | * At application level, device index is index to global list of device. |
| 58 | * At driver level, device index is index to device list on that particular |
| 59 | * factory only. |
| 60 | */ |
| 61 | #define MAKE_DEV_ID(f_id, index) (((f_id & 0xFFFF) << 16) | (index & 0xFFFF)) |
| 62 | #define GET_INDEX(dev_id) ((dev_id) & 0xFFFF) |
| 63 | #define GET_FID(dev_id) ((dev_id) >> 16) |
| 64 | #define DEFAULT_DEV_ID 0 |
| 65 | |
| 66 | |
| 67 | /* extern functions to create factories */ |
| 68 | #if PJMEDIA_VIDEO_DEV_HAS_NULL_VIDEO |
| 69 | pjmedia_vid_dev_factory* pjmedia_null_video_factory(pj_pool_factory *pf); |
| 70 | #endif |
| 71 | |
| 72 | #if PJMEDIA_VIDEO_DEV_HAS_DSHOW |
| 73 | pjmedia_vid_dev_factory* pjmedia_dshow_factory(pj_pool_factory *pf); |
| 74 | #endif |
| 75 | |
| 76 | #if PJMEDIA_VIDEO_DEV_HAS_CBAR_SRC |
| 77 | pjmedia_vid_dev_factory* pjmedia_cbar_factory(pj_pool_factory *pf); |
| 78 | #endif |
| 79 | |
| 80 | #if PJMEDIA_VIDEO_DEV_HAS_SDL |
| 81 | pjmedia_vid_dev_factory* pjmedia_sdl_factory(pj_pool_factory *pf); |
| 82 | #endif |
| 83 | |
| 84 | #if PJMEDIA_VIDEO_DEV_HAS_FFMPEG |
| 85 | pjmedia_vid_dev_factory* pjmedia_ffmpeg_factory(pj_pool_factory *pf); |
| 86 | #endif |
| 87 | |
| 88 | #if PJMEDIA_VIDEO_DEV_HAS_V4L2 |
| 89 | pjmedia_vid_dev_factory* pjmedia_v4l2_factory(pj_pool_factory *pf); |
| 90 | #endif |
| 91 | |
| 92 | #if PJMEDIA_VIDEO_DEV_HAS_QT |
| 93 | pjmedia_vid_dev_factory* pjmedia_qt_factory(pj_pool_factory *pf); |
| 94 | #endif |
| 95 | |
| 96 | #if PJMEDIA_VIDEO_DEV_HAS_IOS |
| 97 | pjmedia_vid_dev_factory* pjmedia_ios_factory(pj_pool_factory *pf); |
| 98 | #endif |
| 99 | |
| 100 | #define MAX_DRIVERS 16 |
| 101 | #define MAX_DEVS 64 |
| 102 | |
| 103 | |
| 104 | /* driver structure */ |
| 105 | struct driver |
| 106 | { |
| 107 | /* Creation function */ |
| 108 | pjmedia_vid_dev_factory_create_func_ptr create; |
| 109 | /* Factory instance */ |
| 110 | pjmedia_vid_dev_factory *f; |
| 111 | char name[32]; /* Driver name */ |
| 112 | unsigned dev_cnt; /* Number of devices */ |
| 113 | unsigned start_idx; /* Start index in global list */ |
| 114 | int cap_dev_idx; /* Default capture device. */ |
| 115 | int rend_dev_idx; /* Default render device */ |
| 116 | }; |
| 117 | |
| 118 | /* The video device subsystem */ |
| 119 | static struct vid_subsys |
| 120 | { |
| 121 | unsigned init_count; /* How many times init() is called */ |
| 122 | pj_pool_factory *pf; /* The pool factory. */ |
| 123 | |
| 124 | unsigned drv_cnt; /* Number of drivers. */ |
| 125 | struct driver drv[MAX_DRIVERS]; /* Array of drivers. */ |
| 126 | |
| 127 | unsigned dev_cnt; /* Total number of devices. */ |
| 128 | pj_uint32_t dev_list[MAX_DEVS];/* Array of device IDs. */ |
| 129 | |
| 130 | } vid_subsys; |
| 131 | |
| 132 | /* API: get capability name/info */ |
| 133 | PJ_DEF(const char*) pjmedia_vid_dev_cap_name(pjmedia_vid_dev_cap cap, |
| 134 | const char **p_desc) |
| 135 | { |
| 136 | const char *desc; |
| 137 | unsigned i; |
| 138 | |
| 139 | if (p_desc==NULL) p_desc = &desc; |
| 140 | |
| 141 | for (i=0; i<PJ_ARRAY_SIZE(cap_infos); ++i) { |
| 142 | if ((1 << i)==cap) |
| 143 | break; |
| 144 | } |
| 145 | |
| 146 | if (i==PJ_ARRAY_SIZE(cap_infos)) { |
| 147 | *p_desc = "??"; |
| 148 | return "??"; |
| 149 | } |
| 150 | |
| 151 | *p_desc = cap_infos[i].info; |
| 152 | return cap_infos[i].name; |
| 153 | } |
| 154 | |
| 155 | static pj_status_t get_cap_pointer(const pjmedia_vid_dev_param *param, |
| 156 | pjmedia_vid_dev_cap cap, |
| 157 | void **ptr, |
| 158 | unsigned *size) |
| 159 | { |
| 160 | #define FIELD_INFO(name) *ptr = (void*)¶m->name; \ |
| 161 | *size = sizeof(param->name) |
| 162 | |
| 163 | switch (cap) { |
| 164 | case PJMEDIA_VID_DEV_CAP_FORMAT: |
| 165 | FIELD_INFO(fmt); |
| 166 | break; |
| 167 | case PJMEDIA_VID_DEV_CAP_INPUT_SCALE: |
| 168 | FIELD_INFO(disp_size); |
| 169 | break; |
| 170 | case PJMEDIA_VID_DEV_CAP_OUTPUT_WINDOW: |
| 171 | FIELD_INFO(window); |
| 172 | break; |
| 173 | case PJMEDIA_VID_DEV_CAP_OUTPUT_RESIZE: |
| 174 | FIELD_INFO(disp_size); |
| 175 | break; |
| 176 | case PJMEDIA_VID_DEV_CAP_OUTPUT_POSITION: |
| 177 | FIELD_INFO(window_pos); |
| 178 | break; |
| 179 | case PJMEDIA_VID_DEV_CAP_OUTPUT_HIDE: |
| 180 | FIELD_INFO(window_hide); |
| 181 | break; |
| 182 | case PJMEDIA_VID_DEV_CAP_INPUT_PREVIEW: |
| 183 | FIELD_INFO(native_preview); |
| 184 | break; |
| 185 | case PJMEDIA_VID_DEV_CAP_ORIENTATION: |
| 186 | FIELD_INFO(orient); |
| 187 | break; |
| 188 | /* The PJMEDIA_VID_DEV_CAP_SWITCH does not have an entry in the |
| 189 | * param (it doesn't make sense to open a stream and tell it |
| 190 | * to switch immediately). |
| 191 | */ |
| 192 | case PJMEDIA_VID_DEV_CAP_OUTPUT_WINDOW_FLAGS: |
| 193 | FIELD_INFO(window_flags); |
| 194 | break; |
| 195 | default: |
| 196 | return PJMEDIA_EVID_INVCAP; |
| 197 | } |
| 198 | |
| 199 | #undef FIELD_INFO |
| 200 | |
| 201 | return PJ_SUCCESS; |
| 202 | } |
| 203 | |
| 204 | /* API: set cap value to param */ |
| 205 | PJ_DEF(pj_status_t) |
| 206 | pjmedia_vid_dev_param_set_cap( pjmedia_vid_dev_param *param, |
| 207 | pjmedia_vid_dev_cap cap, |
| 208 | const void *pval) |
| 209 | { |
| 210 | void *cap_ptr; |
| 211 | unsigned cap_size; |
| 212 | pj_status_t status; |
| 213 | |
| 214 | status = get_cap_pointer(param, cap, &cap_ptr, &cap_size); |
| 215 | if (status != PJ_SUCCESS) |
| 216 | return status; |
| 217 | |
| 218 | pj_memcpy(cap_ptr, pval, cap_size); |
| 219 | param->flags |= cap; |
| 220 | |
| 221 | return PJ_SUCCESS; |
| 222 | } |
| 223 | |
| 224 | /* API: get cap value from param */ |
| 225 | PJ_DEF(pj_status_t) |
| 226 | pjmedia_vid_dev_param_get_cap( const pjmedia_vid_dev_param *param, |
| 227 | pjmedia_vid_dev_cap cap, |
| 228 | void *pval) |
| 229 | { |
| 230 | void *cap_ptr; |
| 231 | unsigned cap_size; |
| 232 | pj_status_t status; |
| 233 | |
| 234 | status = get_cap_pointer(param, cap, &cap_ptr, &cap_size); |
| 235 | if (status != PJ_SUCCESS) |
| 236 | return status; |
| 237 | |
| 238 | if ((param->flags & cap) == 0) { |
| 239 | pj_bzero(cap_ptr, cap_size); |
| 240 | return PJMEDIA_EVID_INVCAP; |
| 241 | } |
| 242 | |
| 243 | pj_memcpy(pval, cap_ptr, cap_size); |
| 244 | return PJ_SUCCESS; |
| 245 | } |
| 246 | |
| 247 | /* Internal: init driver */ |
| 248 | static pj_status_t init_driver(unsigned drv_idx, pj_bool_t refresh) |
| 249 | { |
| 250 | struct driver *drv = &vid_subsys.drv[drv_idx]; |
| 251 | pjmedia_vid_dev_factory *f; |
| 252 | unsigned i, dev_cnt; |
| 253 | pj_status_t status; |
| 254 | |
| 255 | if (!refresh) { |
| 256 | /* Create the factory */ |
| 257 | f = (*drv->create)(vid_subsys.pf); |
| 258 | if (!f) |
| 259 | return PJ_EUNKNOWN; |
| 260 | |
| 261 | /* Call factory->init() */ |
| 262 | status = f->op->init(f); |
| 263 | if (status != PJ_SUCCESS) { |
| 264 | f->op->destroy(f); |
| 265 | return status; |
| 266 | } |
| 267 | } else { |
| 268 | f = drv->f; |
| 269 | } |
| 270 | |
| 271 | /* Get number of devices */ |
| 272 | dev_cnt = f->op->get_dev_count(f); |
| 273 | if (dev_cnt + vid_subsys.dev_cnt > MAX_DEVS) { |
| 274 | PJ_LOG(4,(THIS_FILE, "%d device(s) cannot be registered because" |
| 275 | " there are too many devices", |
| 276 | vid_subsys.dev_cnt + dev_cnt - MAX_DEVS)); |
| 277 | dev_cnt = MAX_DEVS - vid_subsys.dev_cnt; |
| 278 | } |
| 279 | |
| 280 | /* enabling this will cause pjsua-lib initialization to fail when there |
| 281 | * is no video device installed in the system, even when pjsua has been |
| 282 | * run with --null-video |
| 283 | * |
| 284 | if (dev_cnt == 0) { |
| 285 | f->op->destroy(f); |
| 286 | return PJMEDIA_EVID_NODEV; |
| 287 | } |
| 288 | */ |
| 289 | |
| 290 | /* Fill in default devices */ |
| 291 | drv->rend_dev_idx = drv->cap_dev_idx = -1; |
| 292 | for (i=0; i<dev_cnt; ++i) { |
| 293 | pjmedia_vid_dev_info info; |
| 294 | |
| 295 | status = f->op->get_dev_info(f, i, &info); |
| 296 | if (status != PJ_SUCCESS) { |
| 297 | f->op->destroy(f); |
| 298 | return status; |
| 299 | } |
| 300 | |
| 301 | if (drv->name[0]=='\0') { |
| 302 | /* Set driver name */ |
| 303 | pj_ansi_strncpy(drv->name, info.driver, sizeof(drv->name)); |
| 304 | drv->name[sizeof(drv->name)-1] = '\0'; |
| 305 | } |
| 306 | |
| 307 | if (drv->rend_dev_idx < 0 && (info.dir & PJMEDIA_DIR_RENDER)) { |
| 308 | /* Set default render device */ |
| 309 | drv->rend_dev_idx = i; |
| 310 | } |
| 311 | if (drv->cap_dev_idx < 0 && (info.dir & PJMEDIA_DIR_CAPTURE)) { |
| 312 | /* Set default capture device */ |
| 313 | drv->cap_dev_idx = i; |
| 314 | } |
| 315 | |
| 316 | if (drv->rend_dev_idx >= 0 && drv->cap_dev_idx >= 0) { |
| 317 | /* Done. */ |
| 318 | break; |
| 319 | } |
| 320 | } |
| 321 | |
| 322 | /* Register the factory */ |
| 323 | drv->f = f; |
| 324 | drv->f->sys.drv_idx = drv_idx; |
| 325 | drv->start_idx = vid_subsys.dev_cnt; |
| 326 | drv->dev_cnt = dev_cnt; |
| 327 | |
| 328 | /* Register devices to global list */ |
| 329 | for (i=0; i<dev_cnt; ++i) { |
| 330 | vid_subsys.dev_list[vid_subsys.dev_cnt++] = MAKE_DEV_ID(drv_idx, i); |
| 331 | } |
| 332 | |
| 333 | return PJ_SUCCESS; |
| 334 | } |
| 335 | |
| 336 | /* Internal: deinit driver */ |
| 337 | static void deinit_driver(unsigned drv_idx) |
| 338 | { |
| 339 | struct driver *drv = &vid_subsys.drv[drv_idx]; |
| 340 | |
| 341 | if (drv->f) { |
| 342 | drv->f->op->destroy(drv->f); |
| 343 | drv->f = NULL; |
| 344 | } |
| 345 | |
| 346 | drv->dev_cnt = 0; |
| 347 | drv->rend_dev_idx = drv->cap_dev_idx = -1; |
| 348 | } |
| 349 | |
| 350 | /* API: Initialize the video device subsystem. */ |
| 351 | PJ_DEF(pj_status_t) pjmedia_vid_dev_subsys_init(pj_pool_factory *pf) |
| 352 | { |
| 353 | unsigned i; |
| 354 | pj_status_t status = PJ_SUCCESS; |
| 355 | |
| 356 | /* Allow init() to be called multiple times as long as there is matching |
| 357 | * number of shutdown(). |
| 358 | */ |
| 359 | if (vid_subsys.init_count++ != 0) { |
| 360 | return PJ_SUCCESS; |
| 361 | } |
| 362 | |
| 363 | /* Register error subsystem */ |
| 364 | pj_register_strerror(PJMEDIA_VIDEODEV_ERRNO_START, |
| 365 | PJ_ERRNO_SPACE_SIZE, |
| 366 | &pjmedia_videodev_strerror); |
| 367 | |
| 368 | /* Init */ |
| 369 | vid_subsys.pf = pf; |
| 370 | vid_subsys.drv_cnt = 0; |
| 371 | vid_subsys.dev_cnt = 0; |
| 372 | |
| 373 | /* Register creation functions */ |
| 374 | #if PJMEDIA_VIDEO_DEV_HAS_V4L2 |
| 375 | vid_subsys.drv[vid_subsys.drv_cnt++].create = &pjmedia_v4l2_factory; |
| 376 | #endif |
| 377 | #if PJMEDIA_VIDEO_DEV_HAS_QT |
| 378 | vid_subsys.drv[vid_subsys.drv_cnt++].create = &pjmedia_qt_factory; |
| 379 | #endif |
| 380 | #if PJMEDIA_VIDEO_DEV_HAS_IOS |
| 381 | vid_subsys.drv[vid_subsys.drv_cnt++].create = &pjmedia_ios_factory; |
| 382 | #endif |
| 383 | #if PJMEDIA_VIDEO_DEV_HAS_DSHOW |
| 384 | vid_subsys.drv[vid_subsys.drv_cnt++].create = &pjmedia_dshow_factory; |
| 385 | #endif |
| 386 | #if PJMEDIA_VIDEO_DEV_HAS_FFMPEG |
| 387 | vid_subsys.drv[vid_subsys.drv_cnt++].create = &pjmedia_ffmpeg_factory; |
| 388 | #endif |
| 389 | #if PJMEDIA_VIDEO_DEV_HAS_CBAR_SRC |
| 390 | vid_subsys.drv[vid_subsys.drv_cnt++].create = &pjmedia_cbar_factory; |
| 391 | #endif |
| 392 | #if PJMEDIA_VIDEO_DEV_HAS_SDL |
| 393 | vid_subsys.drv[vid_subsys.drv_cnt++].create = &pjmedia_sdl_factory; |
| 394 | #endif |
| 395 | |
| 396 | /* Initialize each factory and build the device ID list */ |
| 397 | for (i=0; i<vid_subsys.drv_cnt; ++i) { |
| 398 | status = init_driver(i, PJ_FALSE); |
| 399 | if (status != PJ_SUCCESS) { |
| 400 | deinit_driver(i); |
| 401 | continue; |
| 402 | } |
| 403 | } |
| 404 | |
| 405 | return vid_subsys.dev_cnt ? PJ_SUCCESS : status; |
| 406 | } |
| 407 | |
| 408 | /* API: register a video device factory to the video device subsystem. */ |
| 409 | PJ_DEF(pj_status_t) |
| 410 | pjmedia_vid_register_factory(pjmedia_vid_dev_factory_create_func_ptr adf, |
| 411 | pjmedia_vid_dev_factory *factory) |
| 412 | { |
| 413 | pj_bool_t refresh = PJ_FALSE; |
| 414 | pj_status_t status; |
| 415 | |
| 416 | if (vid_subsys.init_count == 0) |
| 417 | return PJMEDIA_EVID_INIT; |
| 418 | |
| 419 | vid_subsys.drv[vid_subsys.drv_cnt].create = adf; |
| 420 | vid_subsys.drv[vid_subsys.drv_cnt].f = factory; |
| 421 | |
| 422 | if (factory) { |
| 423 | /* Call factory->init() */ |
| 424 | status = factory->op->init(factory); |
| 425 | if (status != PJ_SUCCESS) { |
| 426 | factory->op->destroy(factory); |
| 427 | return status; |
| 428 | } |
| 429 | refresh = PJ_TRUE; |
| 430 | } |
| 431 | |
| 432 | status = init_driver(vid_subsys.drv_cnt, refresh); |
| 433 | if (status == PJ_SUCCESS) { |
| 434 | vid_subsys.drv_cnt++; |
| 435 | } else { |
| 436 | deinit_driver(vid_subsys.drv_cnt); |
| 437 | } |
| 438 | |
| 439 | return status; |
| 440 | } |
| 441 | |
| 442 | /* API: unregister a video device factory from the video device subsystem. */ |
| 443 | PJ_DEF(pj_status_t) |
| 444 | pjmedia_vid_unregister_factory(pjmedia_vid_dev_factory_create_func_ptr adf, |
| 445 | pjmedia_vid_dev_factory *factory) |
| 446 | { |
| 447 | unsigned i, j; |
| 448 | |
| 449 | if (vid_subsys.init_count == 0) |
| 450 | return PJMEDIA_EVID_INIT; |
| 451 | |
| 452 | for (i=0; i<vid_subsys.drv_cnt; ++i) { |
| 453 | struct driver *drv = &vid_subsys.drv[i]; |
| 454 | |
| 455 | if ((factory && drv->f==factory) || (adf && drv->create == adf)) { |
| 456 | for (j = drv->start_idx; j < drv->start_idx + drv->dev_cnt; j++) |
| 457 | { |
| 458 | vid_subsys.dev_list[j] = (pj_uint32_t)PJMEDIA_VID_INVALID_DEV; |
| 459 | } |
| 460 | |
| 461 | deinit_driver(i); |
| 462 | pj_bzero(drv, sizeof(*drv)); |
| 463 | return PJ_SUCCESS; |
| 464 | } |
| 465 | } |
| 466 | |
| 467 | return PJMEDIA_EVID_ERR; |
| 468 | } |
| 469 | |
| 470 | /* API: get the pool factory registered to the video device subsystem. */ |
| 471 | PJ_DEF(pj_pool_factory*) pjmedia_vid_dev_subsys_get_pool_factory(void) |
| 472 | { |
| 473 | return vid_subsys.pf; |
| 474 | } |
| 475 | |
| 476 | /* API: Shutdown the video device subsystem. */ |
| 477 | PJ_DEF(pj_status_t) pjmedia_vid_dev_subsys_shutdown(void) |
| 478 | { |
| 479 | unsigned i; |
| 480 | |
| 481 | /* Allow shutdown() to be called multiple times as long as there is |
| 482 | * matching number of init(). |
| 483 | */ |
| 484 | if (vid_subsys.init_count == 0) { |
| 485 | return PJ_SUCCESS; |
| 486 | } |
| 487 | --vid_subsys.init_count; |
| 488 | |
| 489 | if (vid_subsys.init_count == 0) { |
| 490 | for (i=0; i<vid_subsys.drv_cnt; ++i) { |
| 491 | deinit_driver(i); |
| 492 | } |
| 493 | |
| 494 | vid_subsys.pf = NULL; |
| 495 | } |
| 496 | return PJ_SUCCESS; |
| 497 | } |
| 498 | |
| 499 | /* API: Refresh the list of video devices installed in the system. */ |
| 500 | PJ_DEF(pj_status_t) pjmedia_vid_dev_refresh(void) |
| 501 | { |
| 502 | unsigned i; |
| 503 | |
| 504 | vid_subsys.dev_cnt = 0; |
| 505 | for (i=0; i<vid_subsys.drv_cnt; ++i) { |
| 506 | struct driver *drv = &vid_subsys.drv[i]; |
| 507 | |
| 508 | if (drv->f && drv->f->op->refresh) { |
| 509 | pj_status_t status = drv->f->op->refresh(drv->f); |
| 510 | if (status != PJ_SUCCESS) { |
| 511 | PJ_PERROR(4, (THIS_FILE, status, "Unable to refresh device " |
| 512 | "list for %s", drv->name)); |
| 513 | } |
| 514 | } |
| 515 | init_driver(i, PJ_TRUE); |
| 516 | } |
| 517 | return PJ_SUCCESS; |
| 518 | } |
| 519 | |
| 520 | /* API: Get the number of video devices installed in the system. */ |
| 521 | PJ_DEF(unsigned) pjmedia_vid_dev_count(void) |
| 522 | { |
| 523 | return vid_subsys.dev_cnt; |
| 524 | } |
| 525 | |
| 526 | /* Internal: convert local index to global device index */ |
| 527 | static pj_status_t make_global_index(unsigned drv_idx, |
| 528 | pjmedia_vid_dev_index *id) |
| 529 | { |
| 530 | if (*id < 0) { |
| 531 | return PJ_SUCCESS; |
| 532 | } |
| 533 | |
| 534 | /* Check that factory still exists */ |
| 535 | PJ_ASSERT_RETURN(vid_subsys.drv[drv_idx].f, PJ_EBUG); |
| 536 | |
| 537 | /* Check that device index is valid */ |
| 538 | PJ_ASSERT_RETURN(*id>=0 && *id<(int)vid_subsys.drv[drv_idx].dev_cnt, |
| 539 | PJ_EBUG); |
| 540 | |
| 541 | *id += vid_subsys.drv[drv_idx].start_idx; |
| 542 | return PJ_SUCCESS; |
| 543 | } |
| 544 | |
| 545 | /* Internal: lookup device id */ |
| 546 | static pj_status_t lookup_dev(pjmedia_vid_dev_index id, |
| 547 | pjmedia_vid_dev_factory **p_f, |
| 548 | unsigned *p_local_index) |
| 549 | { |
| 550 | int f_id, index; |
| 551 | |
| 552 | if (id < 0) { |
| 553 | unsigned i; |
| 554 | |
| 555 | if (id <= PJMEDIA_VID_INVALID_DEV) |
| 556 | return PJMEDIA_EVID_INVDEV; |
| 557 | |
| 558 | for (i=0; i<vid_subsys.drv_cnt; ++i) { |
| 559 | struct driver *drv = &vid_subsys.drv[i]; |
| 560 | if (id==PJMEDIA_VID_DEFAULT_CAPTURE_DEV && |
| 561 | drv->cap_dev_idx >= 0) |
| 562 | { |
| 563 | id = drv->cap_dev_idx; |
| 564 | make_global_index(i, &id); |
| 565 | break; |
| 566 | } else if (id==PJMEDIA_VID_DEFAULT_RENDER_DEV && |
| 567 | drv->rend_dev_idx >= 0) |
| 568 | { |
| 569 | id = drv->rend_dev_idx; |
| 570 | make_global_index(i, &id); |
| 571 | break; |
| 572 | } |
| 573 | } |
| 574 | |
| 575 | if (id < 0) { |
| 576 | return PJMEDIA_EVID_NODEFDEV; |
| 577 | } |
| 578 | } |
| 579 | |
| 580 | f_id = GET_FID(vid_subsys.dev_list[id]); |
| 581 | index = GET_INDEX(vid_subsys.dev_list[id]); |
| 582 | |
| 583 | if (f_id < 0 || f_id >= (int)vid_subsys.drv_cnt) |
| 584 | return PJMEDIA_EVID_INVDEV; |
| 585 | |
| 586 | if (index < 0 || index >= (int)vid_subsys.drv[f_id].dev_cnt) |
| 587 | return PJMEDIA_EVID_INVDEV; |
| 588 | |
| 589 | *p_f = vid_subsys.drv[f_id].f; |
| 590 | *p_local_index = (unsigned)index; |
| 591 | |
| 592 | return PJ_SUCCESS; |
| 593 | |
| 594 | } |
| 595 | |
| 596 | /* API: lookup device id */ |
| 597 | PJ_DEF(pj_status_t) |
| 598 | pjmedia_vid_dev_get_local_index(pjmedia_vid_dev_index id, |
| 599 | pjmedia_vid_dev_factory **p_f, |
| 600 | unsigned *p_local_index) |
| 601 | { |
| 602 | return lookup_dev(id, p_f, p_local_index); |
| 603 | } |
| 604 | |
| 605 | /* API: from factory and local index, get global index */ |
| 606 | PJ_DEF(pj_status_t) |
| 607 | pjmedia_vid_dev_get_global_index(const pjmedia_vid_dev_factory *f, |
| 608 | unsigned local_idx, |
| 609 | pjmedia_vid_dev_index *pid) |
| 610 | { |
| 611 | PJ_ASSERT_RETURN(f->sys.drv_idx >= 0 && f->sys.drv_idx < MAX_DRIVERS, |
| 612 | PJ_EINVALIDOP); |
| 613 | *pid = local_idx; |
| 614 | return make_global_index(f->sys.drv_idx, pid); |
| 615 | } |
| 616 | |
| 617 | /* API: Get device information. */ |
| 618 | PJ_DEF(pj_status_t) pjmedia_vid_dev_get_info(pjmedia_vid_dev_index id, |
| 619 | pjmedia_vid_dev_info *info) |
| 620 | { |
| 621 | pjmedia_vid_dev_factory *f; |
| 622 | unsigned index; |
| 623 | pj_status_t status; |
| 624 | |
| 625 | PJ_ASSERT_RETURN(info, PJ_EINVAL); |
| 626 | PJ_ASSERT_RETURN(vid_subsys.pf, PJMEDIA_EVID_INIT); |
| 627 | |
| 628 | if (id <= PJMEDIA_VID_INVALID_DEV) |
| 629 | return PJMEDIA_EVID_INVDEV; |
| 630 | |
| 631 | status = lookup_dev(id, &f, &index); |
| 632 | if (status != PJ_SUCCESS) |
| 633 | return status; |
| 634 | |
| 635 | status = f->op->get_dev_info(f, index, info); |
| 636 | |
| 637 | /* Make sure device ID is the real ID (not PJMEDIA_VID_DEFAULT_*_DEV) */ |
| 638 | info->id = index; |
| 639 | make_global_index(f->sys.drv_idx, &info->id); |
| 640 | |
| 641 | return status; |
| 642 | } |
| 643 | |
| 644 | /* API: find device */ |
| 645 | PJ_DEF(pj_status_t) pjmedia_vid_dev_lookup( const char *drv_name, |
| 646 | const char *dev_name, |
| 647 | pjmedia_vid_dev_index *id) |
| 648 | { |
| 649 | pjmedia_vid_dev_factory *f = NULL; |
| 650 | unsigned drv_idx, dev_idx; |
| 651 | |
| 652 | PJ_ASSERT_RETURN(drv_name && dev_name && id, PJ_EINVAL); |
| 653 | PJ_ASSERT_RETURN(vid_subsys.pf, PJMEDIA_EVID_INIT); |
| 654 | |
| 655 | for (drv_idx=0; drv_idx<vid_subsys.drv_cnt; ++drv_idx) { |
| 656 | if (!pj_ansi_stricmp(drv_name, vid_subsys.drv[drv_idx].name)) |
| 657 | { |
| 658 | f = vid_subsys.drv[drv_idx].f; |
| 659 | break; |
| 660 | } |
| 661 | } |
| 662 | |
| 663 | if (!f) |
| 664 | return PJ_ENOTFOUND; |
| 665 | |
| 666 | for (dev_idx=0; dev_idx<vid_subsys.drv[drv_idx].dev_cnt; ++dev_idx) |
| 667 | { |
| 668 | pjmedia_vid_dev_info info; |
| 669 | pj_status_t status; |
| 670 | |
| 671 | status = f->op->get_dev_info(f, dev_idx, &info); |
| 672 | if (status != PJ_SUCCESS) |
| 673 | return status; |
| 674 | |
| 675 | if (!pj_ansi_stricmp(dev_name, info.name)) |
| 676 | break; |
| 677 | } |
| 678 | |
| 679 | if (dev_idx==vid_subsys.drv[drv_idx].dev_cnt) |
| 680 | return PJ_ENOTFOUND; |
| 681 | |
| 682 | *id = dev_idx; |
| 683 | make_global_index(drv_idx, id); |
| 684 | |
| 685 | return PJ_SUCCESS; |
| 686 | } |
| 687 | |
| 688 | /* API: Initialize the video device parameters with default values for the |
| 689 | * specified device. |
| 690 | */ |
| 691 | PJ_DEF(pj_status_t) pjmedia_vid_dev_default_param(pj_pool_t *pool, |
| 692 | pjmedia_vid_dev_index id, |
| 693 | pjmedia_vid_dev_param *param) |
| 694 | { |
| 695 | pjmedia_vid_dev_factory *f; |
| 696 | unsigned index; |
| 697 | pj_status_t status; |
| 698 | |
| 699 | PJ_ASSERT_RETURN(param, PJ_EINVAL); |
| 700 | PJ_ASSERT_RETURN(vid_subsys.pf, PJMEDIA_EVID_INIT); |
| 701 | |
| 702 | if (id <= PJMEDIA_VID_INVALID_DEV) |
| 703 | return PJMEDIA_EVID_INVDEV; |
| 704 | |
| 705 | status = lookup_dev(id, &f, &index); |
| 706 | if (status != PJ_SUCCESS) |
| 707 | return status; |
| 708 | |
| 709 | status = f->op->default_param(pool, f, index, param); |
| 710 | if (status != PJ_SUCCESS) |
| 711 | return status; |
| 712 | |
| 713 | /* Normalize device IDs */ |
| 714 | make_global_index(f->sys.drv_idx, ¶m->cap_id); |
| 715 | make_global_index(f->sys.drv_idx, ¶m->rend_id); |
| 716 | |
| 717 | return PJ_SUCCESS; |
| 718 | } |
| 719 | |
| 720 | /* API: Open video stream object using the specified parameters. */ |
| 721 | PJ_DEF(pj_status_t) pjmedia_vid_dev_stream_create( |
| 722 | pjmedia_vid_dev_param *prm, |
| 723 | const pjmedia_vid_dev_cb *cb, |
| 724 | void *user_data, |
| 725 | pjmedia_vid_dev_stream **p_vid_strm) |
| 726 | { |
| 727 | pjmedia_vid_dev_factory *cap_f=NULL, *rend_f=NULL, *f=NULL; |
| 728 | pj_status_t status; |
| 729 | |
| 730 | PJ_ASSERT_RETURN(prm && prm->dir && p_vid_strm, PJ_EINVAL); |
| 731 | PJ_ASSERT_RETURN(vid_subsys.pf, PJMEDIA_EVID_INIT); |
| 732 | PJ_ASSERT_RETURN(prm->dir==PJMEDIA_DIR_CAPTURE || |
| 733 | prm->dir==PJMEDIA_DIR_RENDER || |
| 734 | prm->dir==PJMEDIA_DIR_CAPTURE_RENDER, |
| 735 | PJ_EINVAL); |
| 736 | |
| 737 | /* Normalize cap_id */ |
| 738 | if (prm->dir & PJMEDIA_DIR_CAPTURE) { |
| 739 | unsigned index; |
| 740 | |
| 741 | if (prm->cap_id < 0) |
| 742 | prm->cap_id = PJMEDIA_VID_DEFAULT_CAPTURE_DEV; |
| 743 | |
| 744 | status = lookup_dev(prm->cap_id, &cap_f, &index); |
| 745 | if (status != PJ_SUCCESS) |
| 746 | return status; |
| 747 | |
| 748 | prm->cap_id = index; |
| 749 | f = cap_f; |
| 750 | } |
| 751 | |
| 752 | /* Normalize rend_id */ |
| 753 | if (prm->dir & PJMEDIA_DIR_RENDER) { |
| 754 | unsigned index; |
| 755 | |
| 756 | if (prm->rend_id < 0) |
| 757 | prm->rend_id = PJMEDIA_VID_DEFAULT_RENDER_DEV; |
| 758 | |
| 759 | status = lookup_dev(prm->rend_id, &rend_f, &index); |
| 760 | if (status != PJ_SUCCESS) |
| 761 | return status; |
| 762 | |
| 763 | prm->rend_id = index; |
| 764 | f = rend_f; |
| 765 | } |
| 766 | |
| 767 | PJ_ASSERT_RETURN(f != NULL, PJ_EBUG); |
| 768 | |
| 769 | /* For now, cap_id and rend_id must belong to the same factory */ |
| 770 | PJ_ASSERT_RETURN((prm->dir != PJMEDIA_DIR_CAPTURE_RENDER) || |
| 771 | (cap_f == rend_f), |
| 772 | PJMEDIA_EVID_INVDEV); |
| 773 | |
| 774 | /* Create the stream */ |
| 775 | status = f->op->create_stream(f, prm, cb, |
| 776 | user_data, p_vid_strm); |
| 777 | if (status != PJ_SUCCESS) |
| 778 | return status; |
| 779 | |
| 780 | /* Assign factory id to the stream */ |
| 781 | (*p_vid_strm)->sys.drv_idx = f->sys.drv_idx; |
| 782 | return PJ_SUCCESS; |
| 783 | } |
| 784 | |
| 785 | /* API: Get the running parameters for the specified video stream. */ |
| 786 | PJ_DEF(pj_status_t) pjmedia_vid_dev_stream_get_param( |
| 787 | pjmedia_vid_dev_stream *strm, |
| 788 | pjmedia_vid_dev_param *param) |
| 789 | { |
| 790 | pj_status_t status; |
| 791 | |
| 792 | PJ_ASSERT_RETURN(strm && param, PJ_EINVAL); |
| 793 | PJ_ASSERT_RETURN(vid_subsys.pf, PJMEDIA_EVID_INIT); |
| 794 | |
| 795 | status = strm->op->get_param(strm, param); |
| 796 | if (status != PJ_SUCCESS) |
| 797 | return status; |
| 798 | |
| 799 | /* Normalize device id's */ |
| 800 | make_global_index(strm->sys.drv_idx, ¶m->cap_id); |
| 801 | make_global_index(strm->sys.drv_idx, ¶m->rend_id); |
| 802 | |
| 803 | return PJ_SUCCESS; |
| 804 | } |
| 805 | |
| 806 | /* API: Get the value of a specific capability of the video stream. */ |
| 807 | PJ_DEF(pj_status_t) pjmedia_vid_dev_stream_get_cap( |
| 808 | pjmedia_vid_dev_stream *strm, |
| 809 | pjmedia_vid_dev_cap cap, |
| 810 | void *value) |
| 811 | { |
| 812 | return strm->op->get_cap(strm, cap, value); |
| 813 | } |
| 814 | |
| 815 | /* API: Set the value of a specific capability of the video stream. */ |
| 816 | PJ_DEF(pj_status_t) pjmedia_vid_dev_stream_set_cap( |
| 817 | pjmedia_vid_dev_stream *strm, |
| 818 | pjmedia_vid_dev_cap cap, |
| 819 | const void *value) |
| 820 | { |
| 821 | return strm->op->set_cap(strm, cap, value); |
| 822 | } |
| 823 | |
| 824 | /* API: Start the stream. */ |
| 825 | PJ_DEF(pj_status_t) pjmedia_vid_dev_stream_start(pjmedia_vid_dev_stream *strm) |
| 826 | { |
| 827 | pj_status_t status; |
| 828 | |
| 829 | if (pjmedia_vid_dev_stream_is_running(strm)) |
| 830 | return PJ_SUCCESS; |
| 831 | |
| 832 | status = strm->op->start(strm); |
| 833 | if (status == PJ_SUCCESS) |
| 834 | strm->sys.is_running = PJ_TRUE; |
| 835 | return status; |
| 836 | } |
| 837 | |
| 838 | /* API: has it been started? */ |
| 839 | PJ_DEF(pj_bool_t) |
| 840 | pjmedia_vid_dev_stream_is_running(pjmedia_vid_dev_stream *strm) |
| 841 | { |
| 842 | return strm->sys.is_running; |
| 843 | } |
| 844 | |
| 845 | PJ_DEF(pj_status_t) pjmedia_vid_dev_stream_get_frame( |
| 846 | pjmedia_vid_dev_stream *strm, |
| 847 | pjmedia_frame *frame) |
| 848 | { |
| 849 | pj_assert(strm->op->get_frame); |
| 850 | return strm->op->get_frame(strm, frame); |
| 851 | } |
| 852 | |
| 853 | PJ_DEF(pj_status_t) pjmedia_vid_dev_stream_put_frame( |
| 854 | pjmedia_vid_dev_stream *strm, |
| 855 | const pjmedia_frame *frame) |
| 856 | { |
| 857 | pj_assert(strm->op->put_frame); |
| 858 | return strm->op->put_frame(strm, frame); |
| 859 | } |
| 860 | |
| 861 | /* API: Stop the stream. */ |
| 862 | PJ_DEF(pj_status_t) pjmedia_vid_dev_stream_stop(pjmedia_vid_dev_stream *strm) |
| 863 | { |
| 864 | strm->sys.is_running = PJ_FALSE; |
| 865 | return strm->op->stop(strm); |
| 866 | } |
| 867 | |
| 868 | /* API: Destroy the stream. */ |
| 869 | PJ_DEF(pj_status_t) pjmedia_vid_dev_stream_destroy( |
| 870 | pjmedia_vid_dev_stream *strm) |
| 871 | { |
| 872 | strm->sys.is_running = PJ_FALSE; |
| 873 | return strm->op->destroy(strm); |
| 874 | } |
| 875 | |
| 876 | |
| 877 | #endif /* PJMEDIA_HAS_VIDEO */ |