| /* $Id$ */ |
| /* |
| * 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 <pjmedia/errno.h> |
| #include <pj/assert.h> |
| #include <pj/errno.h> |
| #include <pj/file_access.h> |
| #include <pj/log.h> |
| #include <pj/os.h> |
| #include <pj/rand.h> |
| |
| #if PJMEDIA_VIDEO_DEV_HAS_V4L2 |
| |
| #include <linux/videodev2.h> |
| #include <libv4l2.h> |
| #include <fcntl.h> |
| #include <errno.h> |
| #include <sys/mman.h> |
| |
| #define THIS_FILE "v4l2_dev.c" |
| #define DRIVER_NAME "v4l2" |
| #define V4L2_MAX_DEVS 4 |
| #define DEFAULT_WIDTH 640 |
| #define DEFAULT_HEIGHT 480 |
| #define DEFAULT_FPS 25 |
| #define DEFAULT_CLOCK_RATE 90000 |
| #define INVALID_FD -1 |
| #define BUFFER_CNT 2 |
| #define MAX_IOCTL_RETRY 20 |
| |
| |
| /* mapping between pjmedia_fmt_id and v4l2 pixel format */ |
| typedef struct vid4lin_fmt_map |
| { |
| pj_uint32_t pjmedia_fmt_id; |
| pj_uint32_t v4l2_fmt_id; |
| } vid4lin_fmt_map; |
| |
| /* I/O type being used */ |
| enum vid4lin_io_type |
| { |
| IO_TYPE_NONE, |
| IO_TYPE_READ, |
| IO_TYPE_MMAP, |
| IO_TYPE_MMAP_USER |
| }; |
| |
| /* descriptor for each mmap-ed buffer */ |
| typedef struct vid4lin_buffer |
| { |
| void *start; |
| size_t length; |
| } vid4lin_buffer; |
| |
| /* v4l2 device info */ |
| typedef struct vid4lin_dev_info |
| { |
| pjmedia_vid_dev_info info; |
| char dev_name[32]; |
| struct v4l2_capability v4l2_cap; |
| } vid4lin_dev_info; |
| |
| /* v4l2 factory */ |
| typedef struct vid4lin_factory |
| { |
| pjmedia_vid_dev_factory base; |
| pj_pool_t *pool; |
| pj_pool_t *dev_pool; |
| pj_pool_factory *pf; |
| |
| unsigned dev_count; |
| vid4lin_dev_info *dev_info; |
| } vid4lin_factory; |
| |
| /* Video stream. */ |
| typedef struct vid4lin_stream |
| { |
| pjmedia_vid_dev_stream base; /**< Base stream */ |
| pjmedia_vid_dev_param param; /**< Settings */ |
| pj_pool_t *pool; /**< Memory pool. */ |
| |
| int fd; /**< Video fd. */ |
| char name[64]; /**< Name for log */ |
| enum vid4lin_io_type io_type; /**< I/O method. */ |
| unsigned buf_cnt; /**< MMap buf cnt. */ |
| vid4lin_buffer *buffers; /**< MMap buffers. */ |
| pj_time_val start_time; /**< Time when started */ |
| |
| pjmedia_vid_dev_cb vid_cb; /**< Stream callback */ |
| void *user_data; /**< Application data */ |
| } vid4lin_stream; |
| |
| /* Use this to convert between pjmedia_format_id and V4L2 fourcc */ |
| static vid4lin_fmt_map v4l2_fmt_maps[] = |
| { |
| { PJMEDIA_FORMAT_RGB24, V4L2_PIX_FMT_BGR24 }, |
| { PJMEDIA_FORMAT_RGBA, V4L2_PIX_FMT_BGR32 }, |
| { PJMEDIA_FORMAT_RGB32, V4L2_PIX_FMT_BGR32 }, |
| { PJMEDIA_FORMAT_AYUV, V4L2_PIX_FMT_YUV32 }, |
| { PJMEDIA_FORMAT_YUY2, V4L2_PIX_FMT_YUYV }, |
| { PJMEDIA_FORMAT_UYVY, V4L2_PIX_FMT_UYVY } |
| }; |
| |
| /* Prototypes */ |
| static pj_status_t vid4lin_factory_init(pjmedia_vid_dev_factory *f); |
| static pj_status_t vid4lin_factory_destroy(pjmedia_vid_dev_factory *f); |
| static pj_status_t vid4lin_factory_refresh(pjmedia_vid_dev_factory *f); |
| static unsigned vid4lin_factory_get_dev_count(pjmedia_vid_dev_factory *f); |
| static pj_status_t vid4lin_factory_get_dev_info(pjmedia_vid_dev_factory *f, |
| unsigned index, |
| pjmedia_vid_dev_info *info); |
| static pj_status_t vid4lin_factory_default_param(pj_pool_t *pool, |
| pjmedia_vid_dev_factory *f, |
| unsigned index, |
| pjmedia_vid_dev_param *param); |
| static pj_status_t vid4lin_factory_create_stream(pjmedia_vid_dev_factory *f, |
| pjmedia_vid_dev_param *prm, |
| const pjmedia_vid_dev_cb *cb, |
| void *user_data, |
| pjmedia_vid_dev_stream **p); |
| |
| static pj_status_t vid4lin_stream_get_param(pjmedia_vid_dev_stream *strm, |
| pjmedia_vid_dev_param *param); |
| static pj_status_t vid4lin_stream_get_cap(pjmedia_vid_dev_stream *strm, |
| pjmedia_vid_dev_cap cap, |
| void *value); |
| static pj_status_t vid4lin_stream_set_cap(pjmedia_vid_dev_stream *strm, |
| pjmedia_vid_dev_cap cap, |
| const void *value); |
| static pj_status_t vid4lin_stream_get_frame(pjmedia_vid_dev_stream *strm, |
| pjmedia_frame *frame); |
| static pj_status_t vid4lin_stream_start(pjmedia_vid_dev_stream *strm); |
| static pj_status_t vid4lin_stream_stop(pjmedia_vid_dev_stream *strm); |
| static pj_status_t vid4lin_stream_destroy(pjmedia_vid_dev_stream *strm); |
| |
| /* Operations */ |
| static pjmedia_vid_dev_factory_op factory_op = |
| { |
| &vid4lin_factory_init, |
| &vid4lin_factory_destroy, |
| &vid4lin_factory_get_dev_count, |
| &vid4lin_factory_get_dev_info, |
| &vid4lin_factory_default_param, |
| &vid4lin_factory_create_stream, |
| &vid4lin_factory_refresh |
| }; |
| |
| static pjmedia_vid_dev_stream_op stream_op = |
| { |
| &vid4lin_stream_get_param, |
| &vid4lin_stream_get_cap, |
| &vid4lin_stream_set_cap, |
| &vid4lin_stream_start, |
| &vid4lin_stream_get_frame, |
| NULL, |
| &vid4lin_stream_stop, |
| &vid4lin_stream_destroy |
| }; |
| |
| |
| /**************************************************************************** |
| * Factory operations |
| */ |
| /* |
| * Factory creation function. |
| */ |
| pjmedia_vid_dev_factory* pjmedia_v4l2_factory(pj_pool_factory *pf) |
| { |
| vid4lin_factory *f; |
| pj_pool_t *pool; |
| |
| pool = pj_pool_create(pf, DRIVER_NAME, 512, 512, NULL); |
| f = PJ_POOL_ZALLOC_T(pool, vid4lin_factory); |
| f->pf = pf; |
| f->pool = pool; |
| f->base.op = &factory_op; |
| |
| return &f->base; |
| } |
| |
| /* util: ioctl that tries harder. */ |
| static pj_status_t xioctl(int fh, int request, void *arg) |
| { |
| enum { RETRY = MAX_IOCTL_RETRY }; |
| int r, c=0; |
| |
| do { |
| r = v4l2_ioctl(fh, request, arg); |
| } while (r==-1 && c++<RETRY && ((errno==EINTR) || (errno==EAGAIN))); |
| |
| return (r == -1) ? pj_get_os_error() : PJ_SUCCESS; |
| } |
| |
| /* Scan V4L2 devices */ |
| static pj_status_t v4l2_scan_devs(vid4lin_factory *f) |
| { |
| vid4lin_dev_info vdi[V4L2_MAX_DEVS]; |
| char dev_name[32]; |
| unsigned i, old_count; |
| pj_status_t status; |
| |
| if (f->dev_pool) { |
| pj_pool_release(f->dev_pool); |
| f->dev_pool = NULL; |
| } |
| |
| pj_bzero(vdi, sizeof(vdi)); |
| old_count = f->dev_count; |
| f->dev_count = 0; |
| f->dev_pool = pj_pool_create(f->pf, DRIVER_NAME, 500, 500, NULL); |
| |
| for (i=0; i<V4L2_MAX_DEVS && f->dev_count < V4L2_MAX_DEVS; ++i) { |
| int fd; |
| vid4lin_dev_info *pdi; |
| pj_uint32_t fmt_cap[8]; |
| int j, fmt_cnt=0; |
| |
| pdi = &vdi[f->dev_count]; |
| |
| snprintf(dev_name, sizeof(dev_name), "/dev/video%d", i); |
| if (!pj_file_exists(dev_name)) |
| continue; |
| |
| fd = v4l2_open(dev_name, O_RDWR, 0); |
| if (fd == -1) |
| continue; |
| |
| status = xioctl(fd, VIDIOC_QUERYCAP, &pdi->v4l2_cap); |
| if (status != PJ_SUCCESS) { |
| PJ_PERROR(4,(THIS_FILE, status, "Error querying %s", dev_name)); |
| v4l2_close(fd); |
| continue; |
| } |
| |
| if ((pdi->v4l2_cap.capabilities & V4L2_CAP_VIDEO_CAPTURE) == 0) { |
| v4l2_close(fd); |
| continue; |
| } |
| |
| PJ_LOG(5,(THIS_FILE, "Found capture device %s", pdi->v4l2_cap.card)); |
| PJ_LOG(5,(THIS_FILE, " Enumerating formats:")); |
| for (j=0; fmt_cnt<PJ_ARRAY_SIZE(fmt_cap); ++j) { |
| struct v4l2_fmtdesc fdesc; |
| unsigned k; |
| |
| pj_bzero(&fdesc, sizeof(fdesc)); |
| fdesc.index = j; |
| fdesc.type = V4L2_BUF_TYPE_VIDEO_CAPTURE; |
| |
| status = xioctl(fd, VIDIOC_ENUM_FMT, &fdesc); |
| if (status != PJ_SUCCESS) |
| break; |
| |
| for (k=0; k<PJ_ARRAY_SIZE(v4l2_fmt_maps); ++k) { |
| if (v4l2_fmt_maps[k].v4l2_fmt_id == fdesc.pixelformat) { |
| fmt_cap[fmt_cnt++] = v4l2_fmt_maps[k].pjmedia_fmt_id; |
| PJ_LOG(5,(THIS_FILE, " Supported: %s", |
| fdesc.description)); |
| break; |
| } |
| } |
| if (k==PJ_ARRAY_SIZE(v4l2_fmt_maps)) { |
| PJ_LOG(5,(THIS_FILE, " Unsupported: %s", fdesc.description)); |
| } |
| } |
| |
| v4l2_close(fd); |
| |
| if (fmt_cnt==0) { |
| PJ_LOG(5,(THIS_FILE, " Found no common format")); |
| continue; |
| } |
| |
| strncpy(pdi->dev_name, dev_name, sizeof(pdi->dev_name)); |
| pdi->dev_name[sizeof(pdi->dev_name)-1] = '\0'; |
| strncpy(pdi->info.name, (char*)pdi->v4l2_cap.card, |
| sizeof(pdi->info.name)); |
| pdi->info.name[sizeof(pdi->info.name)-1] = '\0'; |
| strncpy(pdi->info.driver, DRIVER_NAME, sizeof(pdi->info.driver)); |
| pdi->info.driver[sizeof(pdi->info.driver)-1] = '\0'; |
| pdi->info.dir = PJMEDIA_DIR_CAPTURE; |
| pdi->info.has_callback = PJ_FALSE; |
| pdi->info.caps = PJMEDIA_VID_DEV_CAP_FORMAT; |
| |
| pdi->info.fmt_cnt = fmt_cnt; |
| for (j=0; j<fmt_cnt; ++j) { |
| pjmedia_format_init_video(&pdi->info.fmt[j], |
| fmt_cap[j], |
| DEFAULT_WIDTH, |
| DEFAULT_HEIGHT, |
| DEFAULT_FPS, 1); |
| } |
| if (j < fmt_cnt) |
| continue; |
| |
| f->dev_count++; |
| } |
| |
| if (f->dev_count == 0) |
| return PJ_SUCCESS; |
| |
| if (f->dev_count > old_count || f->dev_info == NULL) { |
| f->dev_info = (vid4lin_dev_info*) |
| pj_pool_calloc(f->dev_pool, |
| f->dev_count, |
| sizeof(vid4lin_dev_info)); |
| } |
| pj_memcpy(f->dev_info, vdi, f->dev_count * sizeof(vid4lin_dev_info)); |
| |
| return PJ_SUCCESS; |
| } |
| |
| |
| /* API: init factory */ |
| static pj_status_t vid4lin_factory_init(pjmedia_vid_dev_factory *f) |
| { |
| return vid4lin_factory_refresh(f); |
| } |
| |
| /* API: destroy factory */ |
| static pj_status_t vid4lin_factory_destroy(pjmedia_vid_dev_factory *f) |
| { |
| vid4lin_factory *cf = (vid4lin_factory*)f; |
| pj_pool_t *pool = cf->pool; |
| |
| if (cf->dev_pool) |
| pj_pool_release(cf->dev_pool); |
| if (cf->pool) { |
| cf->pool = NULL; |
| pj_pool_release(pool); |
| } |
| |
| return PJ_SUCCESS; |
| } |
| |
| /* API: refresh the list of devices */ |
| static pj_status_t vid4lin_factory_refresh(pjmedia_vid_dev_factory *f) |
| { |
| vid4lin_factory *cf = (vid4lin_factory*)f; |
| pj_status_t status; |
| |
| status = v4l2_scan_devs(cf); |
| if (status != PJ_SUCCESS) |
| return status; |
| |
| PJ_LOG(4, (THIS_FILE, "Video4Linux2 has %d devices", |
| cf->dev_count)); |
| |
| return PJ_SUCCESS; |
| } |
| |
| /* API: get number of devices */ |
| static unsigned vid4lin_factory_get_dev_count(pjmedia_vid_dev_factory *f) |
| { |
| vid4lin_factory *cf = (vid4lin_factory*)f; |
| return cf->dev_count; |
| } |
| |
| /* API: get device info */ |
| static pj_status_t vid4lin_factory_get_dev_info(pjmedia_vid_dev_factory *f, |
| unsigned index, |
| pjmedia_vid_dev_info *info) |
| { |
| vid4lin_factory *cf = (vid4lin_factory*)f; |
| |
| PJ_ASSERT_RETURN(index < cf->dev_count, PJMEDIA_EVID_INVDEV); |
| |
| pj_memcpy(info, &cf->dev_info[index].info, sizeof(*info)); |
| |
| return PJ_SUCCESS; |
| } |
| |
| /* API: create default device parameter */ |
| static pj_status_t vid4lin_factory_default_param(pj_pool_t *pool, |
| pjmedia_vid_dev_factory *f, |
| unsigned index, |
| pjmedia_vid_dev_param *param) |
| { |
| vid4lin_factory *cf = (vid4lin_factory*)f; |
| |
| PJ_ASSERT_RETURN(index < cf->dev_count, PJMEDIA_EVID_INVDEV); |
| |
| pj_bzero(param, sizeof(*param)); |
| param->dir = PJMEDIA_DIR_CAPTURE; |
| param->cap_id = index; |
| param->rend_id = PJMEDIA_VID_INVALID_DEV; |
| param->flags = PJMEDIA_VID_DEV_CAP_FORMAT; |
| param->clock_rate = DEFAULT_CLOCK_RATE; |
| pjmedia_format_copy(¶m->fmt, &cf->dev_info[index].info.fmt[0]); |
| |
| return PJ_SUCCESS; |
| } |
| |
| static vid4lin_fmt_map* get_v4l2_format_info(pjmedia_format_id id) |
| { |
| unsigned i; |
| |
| for (i = 0; i < PJ_ARRAY_SIZE(v4l2_fmt_maps); i++) { |
| if (v4l2_fmt_maps[i].pjmedia_fmt_id == id) |
| return &v4l2_fmt_maps[i]; |
| } |
| |
| return NULL; |
| } |
| |
| /* util: setup format */ |
| static pj_status_t vid4lin_stream_init_fmt(vid4lin_stream *stream, |
| const pjmedia_vid_dev_param *param, |
| pj_uint32_t pix_fmt) |
| { |
| pjmedia_video_format_detail *vfd; |
| struct v4l2_format v4l2_fmt; |
| pj_status_t status; |
| |
| vfd = pjmedia_format_get_video_format_detail(¶m->fmt, PJ_TRUE); |
| if (vfd == NULL) |
| return PJMEDIA_EVID_BADFORMAT; |
| |
| pj_bzero(&v4l2_fmt, sizeof(v4l2_fmt)); |
| v4l2_fmt.type = V4L2_BUF_TYPE_VIDEO_CAPTURE; |
| v4l2_fmt.fmt.pix.width = vfd->size.w; |
| v4l2_fmt.fmt.pix.height = vfd->size.h; |
| v4l2_fmt.fmt.pix.pixelformat = pix_fmt; |
| v4l2_fmt.fmt.pix.field = V4L2_FIELD_INTERLACED; |
| status = xioctl(stream->fd, VIDIOC_S_FMT, &v4l2_fmt); |
| if (status != PJ_SUCCESS) |
| return status; |
| |
| if (v4l2_fmt.fmt.pix.pixelformat != pix_fmt) { |
| status = PJMEDIA_EVID_BADFORMAT; |
| return status; |
| } |
| |
| if ((v4l2_fmt.fmt.pix.width != vfd->size.w) || |
| (v4l2_fmt.fmt.pix.height != vfd->size.h)) |
| { |
| /* Size has changed */ |
| vfd->size.w = v4l2_fmt.fmt.pix.width; |
| vfd->size.h = v4l2_fmt.fmt.pix.height; |
| } |
| |
| return PJ_SUCCESS; |
| } |
| |
| /* Util: initiate v4l2 streaming via mmap */ |
| static pj_status_t vid4lin_stream_init_streaming(vid4lin_stream *stream) |
| { |
| struct v4l2_requestbuffers req; |
| unsigned i; |
| pj_status_t status; |
| |
| pj_bzero(&req, sizeof(req)); |
| req.count = BUFFER_CNT; |
| req.type = V4L2_BUF_TYPE_VIDEO_CAPTURE; |
| req.memory = V4L2_MEMORY_MMAP; |
| status = xioctl(stream->fd, VIDIOC_REQBUFS, &req); |
| if (status != PJ_SUCCESS) |
| return status; |
| |
| stream->buffers = pj_pool_calloc(stream->pool, req.count, |
| sizeof(*stream->buffers)); |
| stream->buf_cnt = 0; |
| |
| for (i = 0; i < req.count; ++i) { |
| struct v4l2_buffer buf; |
| |
| pj_bzero(&buf, sizeof(buf)); |
| |
| buf.type = V4L2_BUF_TYPE_VIDEO_CAPTURE; |
| buf.memory = V4L2_MEMORY_MMAP; |
| buf.index = i; |
| |
| status = xioctl(stream->fd, VIDIOC_QUERYBUF, &buf); |
| if (status != PJ_SUCCESS) |
| goto on_error; |
| |
| stream->buffers[i].length = buf.length; |
| stream->buffers[i].start = v4l2_mmap(NULL, buf.length, |
| PROT_READ | PROT_WRITE, |
| MAP_SHARED, stream->fd, |
| buf.m.offset); |
| |
| if (MAP_FAILED == stream->buffers[i].start) { |
| status = pj_get_os_error(); |
| goto on_error; |
| } |
| |
| stream->buf_cnt++; |
| } |
| |
| PJ_LOG(5,(THIS_FILE, " mmap streaming initialized")); |
| |
| stream->io_type = IO_TYPE_MMAP; |
| return PJ_SUCCESS; |
| |
| on_error: |
| return status; |
| } |
| |
| /* init streaming with user pointer */ |
| static pj_status_t vid4lin_stream_init_streaming_user(vid4lin_stream *stream) |
| { |
| return PJ_ENOTSUP; |
| } |
| |
| /* init streaming with read() */ |
| static pj_status_t vid4lin_stream_init_read_write(vid4lin_stream *stream) |
| { |
| return PJ_ENOTSUP; |
| } |
| |
| /* API: create stream */ |
| static pj_status_t vid4lin_factory_create_stream(pjmedia_vid_dev_factory *f, |
| pjmedia_vid_dev_param *param, |
| const pjmedia_vid_dev_cb *cb, |
| void *user_data, |
| pjmedia_vid_dev_stream **p_vid_strm) |
| { |
| vid4lin_factory *cf = (vid4lin_factory*)f; |
| pj_pool_t *pool; |
| vid4lin_stream *stream; |
| vid4lin_dev_info *vdi; |
| const vid4lin_fmt_map *fmt_map; |
| const pjmedia_video_format_info *fmt_info; |
| pjmedia_video_format_detail *vfd; |
| pj_status_t status = PJ_SUCCESS; |
| |
| |
| PJ_ASSERT_RETURN(f && param && p_vid_strm, PJ_EINVAL); |
| PJ_ASSERT_RETURN(param->fmt.type == PJMEDIA_TYPE_VIDEO && |
| param->fmt.detail_type == PJMEDIA_FORMAT_DETAIL_VIDEO && |
| param->dir == PJMEDIA_DIR_CAPTURE, |
| PJ_EINVAL); |
| PJ_ASSERT_RETURN(param->cap_id >= 0 && param->cap_id < cf->dev_count, |
| PJMEDIA_EVID_INVDEV); |
| |
| fmt_info = pjmedia_get_video_format_info(NULL, param->fmt.id); |
| if (!fmt_info || (fmt_map=get_v4l2_format_info(param->fmt.id))==NULL) |
| return PJMEDIA_EVID_BADFORMAT; |
| |
| vdi = &cf->dev_info[param->cap_id]; |
| vfd = pjmedia_format_get_video_format_detail(¶m->fmt, PJ_TRUE); |
| |
| /* Create and Initialize stream descriptor */ |
| pool = pj_pool_create(cf->pf, vdi->info.name, 512, 512, NULL); |
| PJ_ASSERT_RETURN(pool != NULL, PJ_ENOMEM); |
| |
| stream = PJ_POOL_ZALLOC_T(pool, vid4lin_stream); |
| pj_memcpy(&stream->param, param, sizeof(*param)); |
| stream->pool = pool; |
| pj_memcpy(&stream->vid_cb, cb, sizeof(*cb)); |
| strncpy(stream->name, vdi->info.name, sizeof(stream->name)); |
| stream->name[sizeof(stream->name)-1] = '\0'; |
| stream->user_data = user_data; |
| stream->fd = INVALID_FD; |
| |
| stream->fd = v4l2_open(vdi->dev_name, O_RDWR, 0); |
| if (stream->fd < 0) |
| goto on_error; |
| |
| status = vid4lin_stream_init_fmt(stream, param, fmt_map->v4l2_fmt_id); |
| if (status != PJ_SUCCESS) |
| goto on_error; |
| |
| if (vdi->v4l2_cap.capabilities & V4L2_CAP_STREAMING) |
| status = vid4lin_stream_init_streaming(stream); |
| |
| if (status!=PJ_SUCCESS && vdi->v4l2_cap.capabilities & V4L2_CAP_STREAMING) |
| status = vid4lin_stream_init_streaming_user(stream); |
| |
| if (status!=PJ_SUCCESS && vdi->v4l2_cap.capabilities & V4L2_CAP_READWRITE) |
| status = vid4lin_stream_init_read_write(stream); |
| |
| if (status != PJ_SUCCESS) { |
| PJ_LOG(1,(THIS_FILE, "Error: unable to initiate I/O on %s", |
| stream->name)); |
| goto on_error; |
| } |
| |
| /* Done */ |
| stream->base.op = &stream_op; |
| *p_vid_strm = &stream->base; |
| |
| return PJ_SUCCESS; |
| |
| on_error: |
| if (status == PJ_SUCCESS) |
| status = PJ_RETURN_OS_ERROR(errno); |
| |
| vid4lin_stream_destroy(&stream->base); |
| return status; |
| } |
| |
| /* API: Get stream info. */ |
| static pj_status_t vid4lin_stream_get_param(pjmedia_vid_dev_stream *s, |
| pjmedia_vid_dev_param *pi) |
| { |
| vid4lin_stream *strm = (vid4lin_stream*)s; |
| |
| PJ_ASSERT_RETURN(strm && pi, PJ_EINVAL); |
| |
| pj_memcpy(pi, &strm->param, sizeof(*pi)); |
| |
| return PJ_SUCCESS; |
| } |
| |
| /* API: get capability */ |
| static pj_status_t vid4lin_stream_get_cap(pjmedia_vid_dev_stream *s, |
| pjmedia_vid_dev_cap cap, |
| void *pval) |
| { |
| vid4lin_stream *strm = (vid4lin_stream*)s; |
| |
| PJ_UNUSED_ARG(strm); |
| |
| PJ_ASSERT_RETURN(s && pval, PJ_EINVAL); |
| |
| if (cap==PJMEDIA_VID_DEV_CAP_INPUT_SCALE) |
| { |
| return PJMEDIA_EVID_INVCAP; |
| // return PJ_SUCCESS; |
| } else { |
| return PJMEDIA_EVID_INVCAP; |
| } |
| } |
| |
| /* API: set capability */ |
| static pj_status_t vid4lin_stream_set_cap(pjmedia_vid_dev_stream *s, |
| pjmedia_vid_dev_cap cap, |
| const void *pval) |
| { |
| vid4lin_stream *strm = (vid4lin_stream*)s; |
| |
| |
| PJ_ASSERT_RETURN(s && pval, PJ_EINVAL); |
| |
| /* |
| if (cap==PJMEDIA_VID_DEV_CAP_INPUT_SCALE) |
| { |
| return PJ_SUCCESS; |
| } |
| */ |
| PJ_UNUSED_ARG(strm); |
| PJ_UNUSED_ARG(cap); |
| PJ_UNUSED_ARG(pval); |
| |
| return PJMEDIA_EVID_INVCAP; |
| } |
| |
| /* get frame from mmap */ |
| static pj_status_t vid4lin_stream_get_frame_mmap(vid4lin_stream *stream, |
| pjmedia_frame *frame) |
| { |
| struct v4l2_buffer buf; |
| pj_time_val time; |
| pj_status_t status = PJ_SUCCESS; |
| unsigned tmp_idx; |
| |
| pj_bzero(&buf, sizeof(buf)); |
| buf.type = V4L2_BUF_TYPE_VIDEO_CAPTURE; |
| buf.memory = V4L2_MEMORY_MMAP; |
| status = xioctl(stream->fd, VIDIOC_DQBUF, &buf); |
| if (status != PJ_SUCCESS) |
| return status; |
| |
| if (frame->size < buf.bytesused) { |
| /* supplied buffer is too small */ |
| pj_assert(!"frame buffer is too small for v4l2"); |
| status = PJ_ETOOSMALL; |
| goto on_return; |
| } |
| |
| time.sec = buf.timestamp.tv_sec; |
| time.msec = buf.timestamp.tv_usec / 1000; |
| PJ_TIME_VAL_SUB(time, stream->start_time); |
| |
| frame->type = PJMEDIA_FRAME_TYPE_VIDEO; |
| frame->bit_info = 0; |
| frame->size = buf.bytesused; |
| frame->timestamp.u64 = PJ_UINT64(1) * PJ_TIME_VAL_MSEC(time) * |
| stream->param.clock_rate / PJ_UINT64(1000); |
| pj_memcpy(frame->buf, stream->buffers[buf.index].start, buf.bytesused); |
| |
| on_return: |
| tmp_idx = buf.index; |
| pj_bzero(&buf, sizeof(buf)); |
| buf.type = V4L2_BUF_TYPE_VIDEO_CAPTURE; |
| buf.memory = V4L2_MEMORY_MMAP; |
| buf.index = tmp_idx; |
| xioctl(stream->fd, VIDIOC_QBUF, &buf); |
| |
| return status; |
| } |
| |
| /* API: Get frame from stream */ |
| static pj_status_t vid4lin_stream_get_frame(pjmedia_vid_dev_stream *strm, |
| pjmedia_frame *frame) |
| { |
| vid4lin_stream *stream = (vid4lin_stream*)strm; |
| |
| if (stream->io_type == IO_TYPE_MMAP) |
| return vid4lin_stream_get_frame_mmap(stream, frame); |
| else { |
| pj_assert(!"Unsupported i/o type"); |
| return PJ_EINVALIDOP; |
| } |
| } |
| |
| /* API: Start stream. */ |
| static pj_status_t vid4lin_stream_start(pjmedia_vid_dev_stream *strm) |
| { |
| vid4lin_stream *stream = (vid4lin_stream*)strm; |
| struct v4l2_buffer buf; |
| enum v4l2_buf_type type; |
| unsigned i; |
| pj_status_t status; |
| |
| PJ_ASSERT_RETURN(stream->fd != -1, PJ_EINVALIDOP); |
| |
| PJ_LOG(4, (THIS_FILE, "Starting v4l2 video stream %s", stream->name)); |
| |
| pj_gettimeofday(&stream->start_time); |
| |
| for (i = 0; i < stream->buf_cnt; ++i) { |
| pj_bzero(&buf, sizeof(buf)); |
| buf.type = V4L2_BUF_TYPE_VIDEO_CAPTURE; |
| buf.memory = V4L2_MEMORY_MMAP; |
| buf.index = i; |
| status = xioctl(stream->fd, VIDIOC_QBUF, &buf); |
| if (status != PJ_SUCCESS) |
| goto on_error; |
| } |
| type = V4L2_BUF_TYPE_VIDEO_CAPTURE; |
| |
| status = xioctl(stream->fd, VIDIOC_STREAMON, &type); |
| if (status != PJ_SUCCESS) |
| goto on_error; |
| |
| return PJ_SUCCESS; |
| |
| on_error: |
| if (i > 0) { |
| /* Dequeue already enqueued buffers. Can we do this while streaming |
| * is not started? |
| */ |
| unsigned n = i; |
| for (i=0; i<n; ++i) { |
| pj_bzero(&buf, sizeof(buf)); |
| buf.type = V4L2_BUF_TYPE_VIDEO_CAPTURE; |
| buf.memory = V4L2_MEMORY_MMAP; |
| xioctl(stream->fd, VIDIOC_DQBUF, &buf); |
| } |
| } |
| return status; |
| } |
| |
| /* API: Stop stream. */ |
| static pj_status_t vid4lin_stream_stop(pjmedia_vid_dev_stream *strm) |
| { |
| vid4lin_stream *stream = (vid4lin_stream*)strm; |
| enum v4l2_buf_type type; |
| pj_status_t status; |
| |
| if (stream->fd < 0) |
| return PJ_SUCCESS; |
| |
| PJ_LOG(4, (THIS_FILE, "Stopping v4l2 video stream %s", stream->name)); |
| |
| type = V4L2_BUF_TYPE_VIDEO_CAPTURE; |
| status = xioctl(stream->fd, VIDIOC_STREAMOFF, &type); |
| if (status != PJ_SUCCESS) |
| return status; |
| |
| return PJ_SUCCESS; |
| } |
| |
| |
| /* API: Destroy stream. */ |
| static pj_status_t vid4lin_stream_destroy(pjmedia_vid_dev_stream *strm) |
| { |
| vid4lin_stream *stream = (vid4lin_stream*)strm; |
| unsigned i; |
| |
| PJ_ASSERT_RETURN(stream != NULL, PJ_EINVAL); |
| |
| vid4lin_stream_stop(strm); |
| |
| PJ_LOG(4, (THIS_FILE, "Destroying v4l2 video stream %s", stream->name)); |
| |
| for (i=0; i<stream->buf_cnt; ++i) { |
| if (stream->buffers[i].start != MAP_FAILED) { |
| v4l2_munmap(stream->buffers[i].start, stream->buffers[i].length); |
| stream->buffers[i].start = MAP_FAILED; |
| } |
| } |
| |
| if (stream->fd >= 0) { |
| v4l2_close(stream->fd); |
| stream->fd = -1; |
| } |
| pj_pool_release(stream->pool); |
| |
| return PJ_SUCCESS; |
| } |
| |
| #endif /* PJMEDIA_VIDEO_DEV_HAS_V4L2 */ |