diff options
Diffstat (limited to 'pjmedia/src/pjmedia/videodev.c')
| -rw-r--r-- | pjmedia/src/pjmedia/videodev.c | 699 |
1 files changed, 699 insertions, 0 deletions
diff --git a/pjmedia/src/pjmedia/videodev.c b/pjmedia/src/pjmedia/videodev.c new file mode 100644 index 00000000..84d26069 --- /dev/null +++ b/pjmedia/src/pjmedia/videodev.c @@ -0,0 +1,699 @@ +/* $Id$ */ +/* + * Copyright (C) 2008-2011 Teluu Inc. (http://www.teluu.com) + * + * This program is free software; you can redistribute it and/or modify + * it under the terms of the GNU General Public License as published by + * the Free Software Foundation; either version 2 of the License, or + * (at your option) any later version. + * + * This program is distributed in the hope that it will be useful, + * but WITHOUT ANY WARRANTY; without even the implied warranty of + * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the + * GNU General Public License for more details. + * + * You should have received a copy of the GNU General Public License + * along with this program; if not, write to the Free Software + * Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA + */ +#include <pjmedia-videodev/videodev_imp.h> +#include <pj/assert.h> +#include <pj/errno.h> +#include <pj/log.h> +#include <pj/pool.h> +#include <pj/string.h> + + +#if defined(PJMEDIA_HAS_VIDEO) && (PJMEDIA_HAS_VIDEO != 0) + + +#define THIS_FILE "videodev.c" + +#define DEFINE_CAP(name, info) {name, info} + +/* Capability names */ +static struct cap_info +{ + const char *name; + const char *info; +} cap_infos[] = +{ + DEFINE_CAP("format", "Video format"), + DEFINE_CAP("scale", "Input dimension"), + DEFINE_CAP("window", "Window handle"), + DEFINE_CAP("resize", "Renderer resize"), + DEFINE_CAP("position", "Renderer position"), + DEFINE_CAP("hide", "Renderer hide"), + DEFINE_CAP("preview", "Input preview"), + DEFINE_CAP("orientation", "Video orientation"), + DEFINE_CAP("switch", "Switch device"), + DEFINE_CAP("wndflags", "Window flags") +}; + + +/* + * The device index seen by application and driver is different. + * + * At application level, device index is index to global list of device. + * At driver level, device index is index to device list on that particular + * factory only. + */ +#define MAKE_DEV_ID(f_id, index) (((f_id & 0xFFFF) << 16) | (index & 0xFFFF)) +#define GET_INDEX(dev_id) ((dev_id) & 0xFFFF) +#define GET_FID(dev_id) ((dev_id) >> 16) +#define DEFAULT_DEV_ID 0 + + +#define MAX_DRIVERS PJMEDIA_VID_DEV_MAX_DRIVERS +#define MAX_DEVS PJMEDIA_VID_DEV_MAX_DEVS + +static pjmedia_vid_subsys vid_subsys; + + +/* API: get the video subsystem. */ +PJ_DEF(pjmedia_vid_subsys*) pjmedia_get_vid_subsys(void) +{ + return &vid_subsys; +} + + +/* API: get capability name/info */ +PJ_DEF(const char*) pjmedia_vid_dev_cap_name(pjmedia_vid_dev_cap cap, + const char **p_desc) +{ + const char *desc; + unsigned i; + + if (p_desc==NULL) p_desc = &desc; + + for (i=0; i<PJ_ARRAY_SIZE(cap_infos); ++i) { + if ((1 << i)==cap) + break; + } + + if (i==PJ_ARRAY_SIZE(cap_infos)) { + *p_desc = "??"; + return "??"; + } + + *p_desc = cap_infos[i].info; + return cap_infos[i].name; +} + +static pj_status_t get_cap_pointer(const pjmedia_vid_dev_param *param, + pjmedia_vid_dev_cap cap, + void **ptr, + unsigned *size) +{ +#define FIELD_INFO(name) *ptr = (void*)¶m->name; \ + *size = sizeof(param->name) + + switch (cap) { + case PJMEDIA_VID_DEV_CAP_FORMAT: + FIELD_INFO(fmt); + break; + case PJMEDIA_VID_DEV_CAP_INPUT_SCALE: + FIELD_INFO(disp_size); + break; + case PJMEDIA_VID_DEV_CAP_OUTPUT_WINDOW: + FIELD_INFO(window); + break; + case PJMEDIA_VID_DEV_CAP_OUTPUT_RESIZE: + FIELD_INFO(disp_size); + break; + case PJMEDIA_VID_DEV_CAP_OUTPUT_POSITION: + FIELD_INFO(window_pos); + break; + case PJMEDIA_VID_DEV_CAP_OUTPUT_HIDE: + FIELD_INFO(window_hide); + break; + case PJMEDIA_VID_DEV_CAP_INPUT_PREVIEW: + FIELD_INFO(native_preview); + break; + case PJMEDIA_VID_DEV_CAP_ORIENTATION: + FIELD_INFO(orient); + break; + /* The PJMEDIA_VID_DEV_CAP_SWITCH does not have an entry in the + * param (it doesn't make sense to open a stream and tell it + * to switch immediately). + */ + case PJMEDIA_VID_DEV_CAP_OUTPUT_WINDOW_FLAGS: + FIELD_INFO(window_flags); + break; + default: + return PJMEDIA_EVID_INVCAP; + } + +#undef FIELD_INFO + + return PJ_SUCCESS; +} + +/* API: set cap value to param */ +PJ_DEF(pj_status_t) +pjmedia_vid_dev_param_set_cap( pjmedia_vid_dev_param *param, + pjmedia_vid_dev_cap cap, + const void *pval) +{ + void *cap_ptr; + unsigned cap_size; + pj_status_t status; + + status = get_cap_pointer(param, cap, &cap_ptr, &cap_size); + if (status != PJ_SUCCESS) + return status; + + pj_memcpy(cap_ptr, pval, cap_size); + param->flags |= cap; + + return PJ_SUCCESS; +} + +/* API: get cap value from param */ +PJ_DEF(pj_status_t) +pjmedia_vid_dev_param_get_cap( const pjmedia_vid_dev_param *param, + pjmedia_vid_dev_cap cap, + void *pval) +{ + void *cap_ptr; + unsigned cap_size; + pj_status_t status; + + status = get_cap_pointer(param, cap, &cap_ptr, &cap_size); + if (status != PJ_SUCCESS) + return status; + + if ((param->flags & cap) == 0) { + pj_bzero(cap_ptr, cap_size); + return PJMEDIA_EVID_INVCAP; + } + + pj_memcpy(pval, cap_ptr, cap_size); + return PJ_SUCCESS; +} + +/* API: init driver */ +PJ_DEF(pj_status_t) pjmedia_vid_driver_init(unsigned drv_idx, + pj_bool_t refresh) +{ + pjmedia_vid_driver *drv = &vid_subsys.drv[drv_idx]; + pjmedia_vid_dev_factory *f; + unsigned i, dev_cnt; + pj_status_t status; + + if (!refresh) { + /* Create the factory */ + f = (*drv->create)(vid_subsys.pf); + if (!f) + return PJ_EUNKNOWN; + + /* Call factory->init() */ + status = f->op->init(f); + if (status != PJ_SUCCESS) { + f->op->destroy(f); + return status; + } + } else { + f = drv->f; + } + + /* Get number of devices */ + dev_cnt = f->op->get_dev_count(f); + if (dev_cnt + vid_subsys.dev_cnt > MAX_DEVS) { + PJ_LOG(4,(THIS_FILE, "%d device(s) cannot be registered because" + " there are too many devices", + vid_subsys.dev_cnt + dev_cnt - MAX_DEVS)); + dev_cnt = MAX_DEVS - vid_subsys.dev_cnt; + } + + /* enabling this will cause pjsua-lib initialization to fail when there + * is no video device installed in the system, even when pjsua has been + * run with --null-video + * + if (dev_cnt == 0) { + f->op->destroy(f); + return PJMEDIA_EVID_NODEV; + } + */ + + /* Fill in default devices */ + drv->rend_dev_idx = drv->cap_dev_idx = -1; + for (i=0; i<dev_cnt; ++i) { + pjmedia_vid_dev_info info; + + status = f->op->get_dev_info(f, i, &info); + if (status != PJ_SUCCESS) { + f->op->destroy(f); + return status; + } + + if (drv->name[0]=='\0') { + /* Set driver name */ + pj_ansi_strncpy(drv->name, info.driver, sizeof(drv->name)); + drv->name[sizeof(drv->name)-1] = '\0'; + } + + if (drv->rend_dev_idx < 0 && (info.dir & PJMEDIA_DIR_RENDER)) { + /* Set default render device */ + drv->rend_dev_idx = i; + } + if (drv->cap_dev_idx < 0 && (info.dir & PJMEDIA_DIR_CAPTURE)) { + /* Set default capture device */ + drv->cap_dev_idx = i; + } + + if (drv->rend_dev_idx >= 0 && drv->cap_dev_idx >= 0) { + /* Done. */ + break; + } + } + + /* Register the factory */ + drv->f = f; + drv->f->sys.drv_idx = drv_idx; + drv->start_idx = vid_subsys.dev_cnt; + drv->dev_cnt = dev_cnt; + + /* Register devices to global list */ + for (i=0; i<dev_cnt; ++i) { + vid_subsys.dev_list[vid_subsys.dev_cnt++] = MAKE_DEV_ID(drv_idx, i); + } + + return PJ_SUCCESS; +} + +/* API: deinit driver */ +PJ_DEF(void) pjmedia_vid_driver_deinit(unsigned drv_idx) +{ + pjmedia_vid_driver *drv = &vid_subsys.drv[drv_idx]; + + if (drv->f) { + drv->f->op->destroy(drv->f); + drv->f = NULL; + } + + drv->dev_cnt = 0; + drv->rend_dev_idx = drv->cap_dev_idx = -1; +} + + +/* API: Refresh the list of video devices installed in the system. */ +PJ_DEF(pj_status_t) pjmedia_vid_dev_refresh(void) +{ + unsigned i; + + vid_subsys.dev_cnt = 0; + for (i=0; i<vid_subsys.drv_cnt; ++i) { + pjmedia_vid_driver *drv = &vid_subsys.drv[i]; + + if (drv->f && drv->f->op->refresh) { + pj_status_t status = drv->f->op->refresh(drv->f); + if (status != PJ_SUCCESS) { + PJ_PERROR(4, (THIS_FILE, status, "Unable to refresh device " + "list for %s", drv->name)); + } + } + pjmedia_vid_driver_init(i, PJ_TRUE); + } + return PJ_SUCCESS; +} + +/* API: Get the number of video devices installed in the system. */ +PJ_DEF(unsigned) pjmedia_vid_dev_count(void) +{ + return vid_subsys.dev_cnt; +} + +/* Internal: convert local index to global device index */ +static pj_status_t make_global_index(unsigned drv_idx, + pjmedia_vid_dev_index *id) +{ + if (*id < 0) { + return PJ_SUCCESS; + } + + /* Check that factory still exists */ + PJ_ASSERT_RETURN(vid_subsys.drv[drv_idx].f, PJ_EBUG); + + /* Check that device index is valid */ + PJ_ASSERT_RETURN(*id>=0 && *id<(int)vid_subsys.drv[drv_idx].dev_cnt, + PJ_EBUG); + + *id += vid_subsys.drv[drv_idx].start_idx; + return PJ_SUCCESS; +} + +/* Internal: lookup device id */ +static pj_status_t lookup_dev(pjmedia_vid_dev_index id, + pjmedia_vid_dev_factory **p_f, + unsigned *p_local_index) +{ + int f_id, index; + + if (id < 0) { + unsigned i; + + if (id <= PJMEDIA_VID_INVALID_DEV) + return PJMEDIA_EVID_INVDEV; + + for (i=0; i<vid_subsys.drv_cnt; ++i) { + pjmedia_vid_driver *drv = &vid_subsys.drv[i]; + if (id==PJMEDIA_VID_DEFAULT_CAPTURE_DEV && + drv->cap_dev_idx >= 0) + { + id = drv->cap_dev_idx; + make_global_index(i, &id); + break; + } else if (id==PJMEDIA_VID_DEFAULT_RENDER_DEV && + drv->rend_dev_idx >= 0) + { + id = drv->rend_dev_idx; + make_global_index(i, &id); + break; + } + } + + if (id < 0) { + return PJMEDIA_EVID_NODEFDEV; + } + } + + f_id = GET_FID(vid_subsys.dev_list[id]); + index = GET_INDEX(vid_subsys.dev_list[id]); + + if (f_id < 0 || f_id >= (int)vid_subsys.drv_cnt) + return PJMEDIA_EVID_INVDEV; + + if (index < 0 || index >= (int)vid_subsys.drv[f_id].dev_cnt) + return PJMEDIA_EVID_INVDEV; + + *p_f = vid_subsys.drv[f_id].f; + *p_local_index = (unsigned)index; + + return PJ_SUCCESS; + +} + +/* API: lookup device id */ +PJ_DEF(pj_status_t) +pjmedia_vid_dev_get_local_index(pjmedia_vid_dev_index id, + pjmedia_vid_dev_factory **p_f, + unsigned *p_local_index) +{ + return lookup_dev(id, p_f, p_local_index); +} + +/* API: from factory and local index, get global index */ +PJ_DEF(pj_status_t) +pjmedia_vid_dev_get_global_index(const pjmedia_vid_dev_factory *f, + unsigned local_idx, + pjmedia_vid_dev_index *pid) +{ + PJ_ASSERT_RETURN(f->sys.drv_idx >= 0 && f->sys.drv_idx < MAX_DRIVERS, + PJ_EINVALIDOP); + *pid = local_idx; + return make_global_index(f->sys.drv_idx, pid); +} + +/* API: Get device information. */ +PJ_DEF(pj_status_t) pjmedia_vid_dev_get_info(pjmedia_vid_dev_index id, + pjmedia_vid_dev_info *info) +{ + pjmedia_vid_dev_factory *f; + unsigned index; + pj_status_t status; + + PJ_ASSERT_RETURN(info, PJ_EINVAL); + PJ_ASSERT_RETURN(vid_subsys.pf, PJMEDIA_EVID_INIT); + + if (id <= PJMEDIA_VID_INVALID_DEV) + return PJMEDIA_EVID_INVDEV; + + status = lookup_dev(id, &f, &index); + if (status != PJ_SUCCESS) + return status; + + status = f->op->get_dev_info(f, index, info); + + /* Make sure device ID is the real ID (not PJMEDIA_VID_DEFAULT_*_DEV) */ + info->id = index; + make_global_index(f->sys.drv_idx, &info->id); + + return status; +} + +/* API: find device */ +PJ_DEF(pj_status_t) pjmedia_vid_dev_lookup( const char *drv_name, + const char *dev_name, + pjmedia_vid_dev_index *id) +{ + pjmedia_vid_dev_factory *f = NULL; + unsigned drv_idx, dev_idx; + + PJ_ASSERT_RETURN(drv_name && dev_name && id, PJ_EINVAL); + PJ_ASSERT_RETURN(vid_subsys.pf, PJMEDIA_EVID_INIT); + + for (drv_idx=0; drv_idx<vid_subsys.drv_cnt; ++drv_idx) { + if (!pj_ansi_stricmp(drv_name, vid_subsys.drv[drv_idx].name)) + { + f = vid_subsys.drv[drv_idx].f; + break; + } + } + + if (!f) + return PJ_ENOTFOUND; + + for (dev_idx=0; dev_idx<vid_subsys.drv[drv_idx].dev_cnt; ++dev_idx) + { + pjmedia_vid_dev_info info; + pj_status_t status; + + status = f->op->get_dev_info(f, dev_idx, &info); + if (status != PJ_SUCCESS) + return status; + + if (!pj_ansi_stricmp(dev_name, info.name)) + break; + } + + if (dev_idx==vid_subsys.drv[drv_idx].dev_cnt) + return PJ_ENOTFOUND; + + *id = dev_idx; + make_global_index(drv_idx, id); + + return PJ_SUCCESS; +} + +/* API: Initialize the video device parameters with default values for the + * specified device. + */ +PJ_DEF(pj_status_t) pjmedia_vid_dev_default_param(pj_pool_t *pool, + pjmedia_vid_dev_index id, + pjmedia_vid_dev_param *param) +{ + pjmedia_vid_dev_factory *f; + unsigned index; + pj_status_t status; + + PJ_ASSERT_RETURN(param, PJ_EINVAL); + PJ_ASSERT_RETURN(vid_subsys.pf, PJMEDIA_EVID_INIT); + + if (id <= PJMEDIA_VID_INVALID_DEV) + return PJMEDIA_EVID_INVDEV; + + status = lookup_dev(id, &f, &index); + if (status != PJ_SUCCESS) + return status; + + status = f->op->default_param(pool, f, index, param); + if (status != PJ_SUCCESS) + return status; + + /* Normalize device IDs */ + make_global_index(f->sys.drv_idx, ¶m->cap_id); + make_global_index(f->sys.drv_idx, ¶m->rend_id); + + return PJ_SUCCESS; +} + +/* API: Open video stream object using the specified parameters. */ +PJ_DEF(pj_status_t) pjmedia_vid_dev_stream_create( + pjmedia_vid_dev_param *prm, + const pjmedia_vid_dev_cb *cb, + void *user_data, + pjmedia_vid_dev_stream **p_vid_strm) +{ + pjmedia_vid_dev_factory *cap_f=NULL, *rend_f=NULL, *f=NULL; + pj_status_t status; + + PJ_ASSERT_RETURN(prm && prm->dir && p_vid_strm, PJ_EINVAL); + PJ_ASSERT_RETURN(vid_subsys.pf, PJMEDIA_EVID_INIT); + PJ_ASSERT_RETURN(prm->dir==PJMEDIA_DIR_CAPTURE || + prm->dir==PJMEDIA_DIR_RENDER || + prm->dir==PJMEDIA_DIR_CAPTURE_RENDER, + PJ_EINVAL); + + /* Normalize cap_id */ + if (prm->dir & PJMEDIA_DIR_CAPTURE) { + unsigned index; + + if (prm->cap_id < 0) + prm->cap_id = PJMEDIA_VID_DEFAULT_CAPTURE_DEV; + + status = lookup_dev(prm->cap_id, &cap_f, &index); + if (status != PJ_SUCCESS) + return status; + + prm->cap_id = index; + f = cap_f; + } + + /* Normalize rend_id */ + if (prm->dir & PJMEDIA_DIR_RENDER) { + unsigned index; + + if (prm->rend_id < 0) + prm->rend_id = PJMEDIA_VID_DEFAULT_RENDER_DEV; + + status = lookup_dev(prm->rend_id, &rend_f, &index); + if (status != PJ_SUCCESS) + return status; + + prm->rend_id = index; + f = rend_f; + } + + PJ_ASSERT_RETURN(f != NULL, PJ_EBUG); + + /* For now, cap_id and rend_id must belong to the same factory */ + PJ_ASSERT_RETURN((prm->dir != PJMEDIA_DIR_CAPTURE_RENDER) || + (cap_f == rend_f), + PJMEDIA_EVID_INVDEV); + + /* Create the stream */ + status = f->op->create_stream(f, prm, cb, + user_data, p_vid_strm); + if (status != PJ_SUCCESS) + return status; + + /* Assign factory id to the stream */ + (*p_vid_strm)->sys.drv_idx = f->sys.drv_idx; + return PJ_SUCCESS; +} + +/* API: Get the running parameters for the specified video stream. */ +PJ_DEF(pj_status_t) pjmedia_vid_dev_stream_get_param( + pjmedia_vid_dev_stream *strm, + pjmedia_vid_dev_param *param) +{ + pj_status_t status; + + PJ_ASSERT_RETURN(strm && param, PJ_EINVAL); + PJ_ASSERT_RETURN(vid_subsys.pf, PJMEDIA_EVID_INIT); + + status = strm->op->get_param(strm, param); + if (status != PJ_SUCCESS) + return status; + + /* Normalize device id's */ + make_global_index(strm->sys.drv_idx, ¶m->cap_id); + make_global_index(strm->sys.drv_idx, ¶m->rend_id); + + return PJ_SUCCESS; +} + +/* API: Get the value of a specific capability of the video stream. */ +PJ_DEF(pj_status_t) pjmedia_vid_dev_stream_get_cap( + pjmedia_vid_dev_stream *strm, + pjmedia_vid_dev_cap cap, + void *value) +{ + return strm->op->get_cap(strm, cap, value); +} + +/* API: Set the value of a specific capability of the video stream. */ +PJ_DEF(pj_status_t) pjmedia_vid_dev_stream_set_cap( + pjmedia_vid_dev_stream *strm, + pjmedia_vid_dev_cap cap, + const void *value) +{ + /* For fast switching, device global index needs to be converted to + * local index before forwarding the request to the device stream. + */ + if (cap == PJMEDIA_VID_DEV_CAP_SWITCH) { + pjmedia_vid_dev_factory *f; + unsigned local_idx; + pj_status_t status; + pjmedia_vid_dev_switch_param p = *(pjmedia_vid_dev_switch_param*)value; + + status = lookup_dev(p.target_id, &f, &local_idx); + if (status != PJ_SUCCESS) + return status; + + /* Make sure that current & target devices share the same factory */ + if (f->sys.drv_idx != strm->sys.drv_idx) + return PJMEDIA_EVID_INVDEV; + + p.target_id = local_idx; + return strm->op->set_cap(strm, cap, &p); + } + + return strm->op->set_cap(strm, cap, value); +} + +/* API: Start the stream. */ +PJ_DEF(pj_status_t) pjmedia_vid_dev_stream_start(pjmedia_vid_dev_stream *strm) +{ + pj_status_t status; + + if (pjmedia_vid_dev_stream_is_running(strm)) + return PJ_SUCCESS; + + status = strm->op->start(strm); + if (status == PJ_SUCCESS) + strm->sys.is_running = PJ_TRUE; + return status; +} + +/* API: has it been started? */ +PJ_DEF(pj_bool_t) +pjmedia_vid_dev_stream_is_running(pjmedia_vid_dev_stream *strm) +{ + return strm->sys.is_running; +} + +PJ_DEF(pj_status_t) pjmedia_vid_dev_stream_get_frame( + pjmedia_vid_dev_stream *strm, + pjmedia_frame *frame) +{ + pj_assert(strm->op->get_frame); + return strm->op->get_frame(strm, frame); +} + +PJ_DEF(pj_status_t) pjmedia_vid_dev_stream_put_frame( + pjmedia_vid_dev_stream *strm, + const pjmedia_frame *frame) +{ + pj_assert(strm->op->put_frame); + return strm->op->put_frame(strm, frame); +} + +/* API: Stop the stream. */ +PJ_DEF(pj_status_t) pjmedia_vid_dev_stream_stop(pjmedia_vid_dev_stream *strm) +{ + strm->sys.is_running = PJ_FALSE; + return strm->op->stop(strm); +} + +/* API: Destroy the stream. */ +PJ_DEF(pj_status_t) pjmedia_vid_dev_stream_destroy( + pjmedia_vid_dev_stream *strm) +{ + strm->sys.is_running = PJ_FALSE; + return strm->op->destroy(strm); +} + + +#endif /* PJMEDIA_HAS_VIDEO */ |