From cd283c8825c9a94400f27735acb1c9385e90ffc8 Mon Sep 17 00:00:00 2001 From: Nanang Izzuddin Date: Tue, 19 Jul 2011 03:42:28 +0000 Subject: Re #1326: Initial code integration from branch 2.0-dev to trunk as "2.0-pre-alpha-svn". git-svn-id: http://svn.pjsip.org/repos/pjproject/trunk@3664 74dad513-b988-da41-8d7b-12977e46ad98 --- pjmedia/src/pjmedia-videodev/v4l2_dev.c | 820 ++++++++++++++++++++++++++++++++ 1 file changed, 820 insertions(+) create mode 100644 pjmedia/src/pjmedia-videodev/v4l2_dev.c (limited to 'pjmedia/src/pjmedia-videodev/v4l2_dev.c') diff --git a/pjmedia/src/pjmedia-videodev/v4l2_dev.c b/pjmedia/src/pjmedia-videodev/v4l2_dev.c new file mode 100644 index 00000000..545c9975 --- /dev/null +++ b/pjmedia/src/pjmedia-videodev/v4l2_dev.c @@ -0,0 +1,820 @@ +/* $Id$ */ +/* + * Copyright (C) 2008-2010 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 +#include +#include +#include +#include +#include +#include +#include + +#if PJMEDIA_VIDEO_DEV_HAS_V4L2 + +#include +#include +#include +#include +#include + +#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++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; idev_count < V4L2_MAX_DEVS; ++i) { + int fd; + vid4lin_dev_info *pdi; + pj_pool_t *pool = f->dev_pool; + 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_cntdev_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; jinfo.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; + pjmedia_event_publisher_init(&stream->base.epub, PJMEDIA_SIG_VID_DEV_V4L2); + + stream->fd = v4l2_open(vdi->dev_name, O_RDWR | O_NONBLOCK, 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; + + 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->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: + pj_bzero(&buf, sizeof(buf)); + buf.type = V4L2_BUF_TYPE_VIDEO_CAPTURE; + buf.memory = V4L2_MEMORY_MMAP; + 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; ifd, 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; ibuf_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 */ -- cgit v1.2.3