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v4l2: add video_size private option.

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This commit is contained in:
Anton Khirnov 2011-05-24 07:43:01 +02:00
parent 82b5aa0add
commit 8fe7b6443f
1 changed files with 16 additions and 2 deletions
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18
libavdevice/v4l2.c
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@ -46,6 +46,7 @@
#include "libavutil/imgutils.h"
#include "libavutil/log.h"
#include "libavutil/opt.h"
#include "libavutil/parseutils.h"
static const int desired_video_buffers = 256;
@ -69,6 +70,7 @@ struct video_data {
unsigned int *buf_len;
char *standard;
int channel;
char *video_size; /**< String describing video size, set by a private option. */
};
struct buff_data {
@ -588,8 +590,16 @@ static int v4l2_read_header(AVFormatContext *s1, AVFormatParameters *ap)
}
av_set_pts_info(st, 64, 1, 1000000); /* 64 bits pts in us */
s->width = ap->width;
s->height = ap->height;
if (s->video_size && (res = av_parse_video_size(&s->width, &s->height, s->video_size)) < 0) {
av_log(s1, AV_LOG_ERROR, "Couldn't parse video size.\n");
goto out;
}
#if FF_API_FORMAT_PARAMETERS
if (ap->width > 0)
s->width = ap->width;
if (ap->height > 0)
s->height = ap->height;
#endif
capabilities = 0;
s->fd = device_open(s1, &capabilities);
@ -659,6 +669,7 @@ static int v4l2_read_header(AVFormatContext *s1, AVFormatParameters *ap)
st->codec->bit_rate = s->frame_size * 1/av_q2d(st->codec->time_base) * 8;
out:
av_freep(&s->video_size);
return res;
}
@ -702,9 +713,12 @@ static int v4l2_read_close(AVFormatContext *s1)
return 0;
}
#define OFFSET(x) offsetof(struct video_data, x)
#define DEC AV_OPT_FLAG_DECODING_PARAM
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 },
{ "video_size", "A string describing frame size, such as 640x480 or hd720.", OFFSET(video_size), FF_OPT_TYPE_STRING, {.str = NULL}, 0, 0, DEC },
{ NULL },
};