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v4l: add a private option for video standard.

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This commit is contained in:
Anton Khirnov 2011-05-23 21:21:59 +02:00
parent eb040dbbd3
commit a861ffeffa
1 changed files with 30 additions and 7 deletions
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37
libavdevice/v4l.c
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@ -23,6 +23,8 @@
#include "config.h"
#include "libavutil/rational.h"
#include "libavutil/imgutils.h"
#include "libavutil/log.h"
#include "libavutil/opt.h"
#include "libavformat/avformat.h"
#include "libavcodec/dsputil.h"
#include <unistd.h>
@ -36,6 +38,7 @@
#include <strings.h>
typedef struct {
AVClass *class;
int fd;
int frame_format; /* see VIDEO_PALETTE_xxx */
int use_mmap;
@ -49,6 +52,7 @@ typedef struct {
struct video_mbuf gb_buffers;
struct video_mmap gb_buf;
int gb_frame;
int standard;
} VideoData;
static const struct {
@ -131,13 +135,16 @@ static int grab_read_header(AVFormatContext *s1, AVFormatParameters *ap)
}
/* set tv standard */
if (ap->standard && !ioctl(video_fd, VIDIOCGTUNER, &tuner)) {
if (!strcasecmp(ap->standard, "pal"))
tuner.mode = VIDEO_MODE_PAL;
else if (!strcasecmp(ap->standard, "secam"))
tuner.mode = VIDEO_MODE_SECAM;
else
tuner.mode = VIDEO_MODE_NTSC;
if (!ioctl(video_fd, VIDIOCGTUNER, &tuner)) {
if (ap->standard) {
if (!strcasecmp(ap->standard, "pal"))
s->standard = VIDEO_MODE_PAL;
else if (!strcasecmp(ap->standard, "secam"))
s->standard = VIDEO_MODE_SECAM;
else
s->standard = VIDEO_MODE_NTSC;
}
tuner.mode = s->standard;
ioctl(video_fd, VIDIOCSTUNER, &tuner);
}
@ -333,6 +340,21 @@ static int grab_read_close(AVFormatContext *s1)
return 0;
}
static const AVOption options[] = {
{ "standard", "", offsetof(VideoData, standard), FF_OPT_TYPE_INT, {.dbl = VIDEO_MODE_NTSC}, VIDEO_MODE_PAL, VIDEO_MODE_NTSC, AV_OPT_FLAG_DECODING_PARAM, "standard" },
{ "PAL", "", 0, FF_OPT_TYPE_CONST, {.dbl = VIDEO_MODE_PAL}, 0, 0, AV_OPT_FLAG_DECODING_PARAM, "standard" },
{ "SECAM", "", 0, FF_OPT_TYPE_CONST, {.dbl = VIDEO_MODE_SECAM}, 0, 0, AV_OPT_FLAG_DECODING_PARAM, "standard" },
{ "NTSC", "", 0, FF_OPT_TYPE_CONST, {.dbl = VIDEO_MODE_NTSC}, 0, 0, AV_OPT_FLAG_DECODING_PARAM, "standard" },
{ NULL },
};
static const AVClass v4l_class = {
.class_name = "V4L indev",
.item_name = av_default_item_name,
.option = options,
.version = LIBAVUTIL_VERSION_INT,
};
AVInputFormat ff_v4l_demuxer = {
"video4linux",
NULL_IF_CONFIG_SMALL("Video4Linux device grab"),
@ -342,4 +364,5 @@ AVInputFormat ff_v4l_demuxer = {
grab_read_packet,
grab_read_close,
.flags = AVFMT_NOFILE,
.priv_class = &v4l_class,
};