diff options
Diffstat (limited to 'libavdevice/v4l2.c')
-rw-r--r-- | libavdevice/v4l2.c | 70 |
1 files changed, 50 insertions, 20 deletions
diff --git a/libavdevice/v4l2.c b/libavdevice/v4l2.c index 1f1a4bcfb8..a0fc99242e 100644 --- a/libavdevice/v4l2.c +++ b/libavdevice/v4l2.c @@ -44,6 +44,8 @@ #include <time.h> #include <strings.h> #include "libavutil/imgutils.h" +#include "libavutil/log.h" +#include "libavutil/opt.h" static const int desired_video_buffers = 256; @@ -54,6 +56,7 @@ enum io_method { }; struct video_data { + AVClass *class; int fd; int frame_format; /* V4L2_PIX_FMT_* */ enum io_method io_method; @@ -64,6 +67,8 @@ struct video_data { int buffers; void **buf_start; unsigned int *buf_len; + char *standard; + int channel; }; struct buff_data { @@ -448,50 +453,61 @@ static int v4l2_set_parameters(AVFormatContext *s1, AVFormatParameters *ap) streamparm.type = V4L2_BUF_TYPE_VIDEO_CAPTURE; - if (ap->channel>=0) { - /* set tv video input */ - memset (&input, 0, sizeof (input)); - input.index = ap->channel; - if (ioctl(s->fd, VIDIOC_ENUMINPUT, &input) < 0) { - av_log(s1, AV_LOG_ERROR, "The V4L2 driver ioctl enum input failed:\n"); - return AVERROR(EIO); - } +#if FF_API_FORMAT_PARAMETERS + if (ap->channel > 0) + s->channel = ap->channel; +#endif - av_log(s1, AV_LOG_DEBUG, "The V4L2 driver set input_id: %d, input: %s\n", - ap->channel, input.name); - if (ioctl(s->fd, VIDIOC_S_INPUT, &input.index) < 0) { - av_log(s1, AV_LOG_ERROR, "The V4L2 driver ioctl set input(%d) failed\n", - ap->channel); - return AVERROR(EIO); - } + /* set tv video input */ + memset (&input, 0, sizeof (input)); + input.index = s->channel; + if (ioctl(s->fd, VIDIOC_ENUMINPUT, &input) < 0) { + av_log(s1, AV_LOG_ERROR, "The V4L2 driver ioctl enum input failed:\n"); + return AVERROR(EIO); + } + + av_log(s1, AV_LOG_DEBUG, "The V4L2 driver set input_id: %d, input: %s\n", + s->channel, input.name); + if (ioctl(s->fd, VIDIOC_S_INPUT, &input.index) < 0) { + av_log(s1, AV_LOG_ERROR, "The V4L2 driver ioctl set input(%d) failed\n", + s->channel); + return AVERROR(EIO); } +#if FF_API_FORMAT_PARAMETERS if (ap->standard) { + av_freep(&s->standard); + s->standard = av_strdup(ap->standard); + } +#endif + + if (s->standard) { av_log(s1, AV_LOG_DEBUG, "The V4L2 driver set standard: %s\n", - ap->standard); + s->standard); /* set tv standard */ memset (&standard, 0, sizeof (standard)); for(i=0;;i++) { standard.index = i; if (ioctl(s->fd, VIDIOC_ENUMSTD, &standard) < 0) { av_log(s1, AV_LOG_ERROR, "The V4L2 driver ioctl set standard(%s) failed\n", - ap->standard); + s->standard); return AVERROR(EIO); } - if (!strcasecmp(standard.name, ap->standard)) { + if (!strcasecmp(standard.name, s->standard)) { break; } } av_log(s1, AV_LOG_DEBUG, "The V4L2 driver set standard: %s, id: %"PRIu64"\n", - ap->standard, (uint64_t)standard.id); + s->standard, (uint64_t)standard.id); if (ioctl(s->fd, VIDIOC_S_STD, &standard.id) < 0) { av_log(s1, AV_LOG_ERROR, "The V4L2 driver ioctl set standard(%s) failed\n", - ap->standard); + s->standard); return AVERROR(EIO); } } + av_freep(&s->standard); if (ap->time_base.num && ap->time_base.den) { av_log(s1, AV_LOG_DEBUG, "Setting time per frame to %d/%d\n", @@ -680,6 +696,19 @@ static int v4l2_read_close(AVFormatContext *s1) return 0; } +static const AVOption options[] = { + { "standard", "", offsetof(struct video_data, standard), FF_OPT_TYPE_STRING, {.str = "NTSC" }, 0, 0, AV_OPT_FLAG_DECODING_PARAM }, + { "channel", "", offsetof(struct video_data, channel), FF_OPT_TYPE_INT, {.dbl = 0 }, 0, INT_MAX, AV_OPT_FLAG_DECODING_PARAM }, + { NULL }, +}; + +static const AVClass v4l2_class = { + .class_name = "V4L2 indev", + .item_name = av_default_item_name, + .option = options, + .version = LIBAVUTIL_VERSION_INT, +}; + AVInputFormat ff_v4l2_demuxer = { "video4linux2", NULL_IF_CONFIG_SMALL("Video4Linux2 device grab"), @@ -689,4 +718,5 @@ AVInputFormat ff_v4l2_demuxer = { v4l2_read_packet, v4l2_read_close, .flags = AVFMT_NOFILE, + .priv_class = &v4l2_class, }; |