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bktr: add a framerate private option.

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This commit is contained in:
Anton Khirnov 2011-05-24 21:16:47 +02:00
parent 4c1e56ede8
commit 3e3db4d93d
1 changed files with 13 additions and 11 deletions
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24
libavdevice/bktr.c
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@ -54,11 +54,10 @@ typedef struct {
int video_fd;
int tuner_fd;
int width, height;
int frame_rate;
int frame_rate_base;
uint64_t per_frame;
int standard;
char *video_size; /**< String describing video size, set by a private option. */
char *framerate; /**< Set by a private option. */
} VideoData;
@ -249,8 +248,7 @@ static int grab_read_header(AVFormatContext *s1, AVFormatParameters *ap)
VideoData *s = s1->priv_data;
AVStream *st;
int width, height;
int frame_rate;
int frame_rate_base;
AVRational fps;
int ret = 0;
if (ap->time_base.den <= 0) {
@ -262,14 +260,18 @@ static int grab_read_header(AVFormatContext *s1, AVFormatParameters *ap)
av_log(s1, AV_LOG_ERROR, "Couldn't parse video size.\n");
goto out;
}
if ((ret = av_parse_video_rate(&fps, s->framerate)) < 0) {
av_log(s1, AV_LOG_ERROR, "Couldn't parse framerate.\n");
goto out;
}
#if FF_API_FORMAT_PARAMETERS
if (ap->width > 0)
width = ap->width;
if (ap->height > 0)
height = ap->height;
if (ap->time_base.num)
fps = (AVRational){ap->time_base.den, ap->time_base.num};
#endif
frame_rate = ap->time_base.den;
frame_rate_base = ap->time_base.num;
st = av_new_stream(s1, 0);
if (!st) {
@ -280,17 +282,15 @@ static int grab_read_header(AVFormatContext *s1, AVFormatParameters *ap)
s->width = width;
s->height = height;
s->frame_rate = frame_rate;
s->frame_rate_base = frame_rate_base;
s->per_frame = ((uint64_t)1000000 * s->frame_rate_base) / s->frame_rate;
s->per_frame = ((uint64_t)1000000 * fps.den) / fps.num;
st->codec->codec_type = AVMEDIA_TYPE_VIDEO;
st->codec->pix_fmt = PIX_FMT_YUV420P;
st->codec->codec_id = CODEC_ID_RAWVIDEO;
st->codec->width = width;
st->codec->height = height;
st->codec->time_base.den = frame_rate;
st->codec->time_base.num = frame_rate_base;
st->codec->time_base.den = fps.num;
st->codec->time_base.num = fps.den;
#if FF_API_FORMAT_PARAMETERS
if (ap->standard) {
@ -314,6 +314,7 @@ static int grab_read_header(AVFormatContext *s1, AVFormatParameters *ap)
out:
av_freep(&s->video_size);
av_freep(&s->framerate);
return ret;
}
@ -346,6 +347,7 @@ static const AVOption options[] = {
{ "PALM", "", 0, FF_OPT_TYPE_CONST, {.dbl = PALM}, 0, 0, AV_OPT_FLAG_DECODING_PARAM, "standard" },
{ "NTSCJ", "", 0, FF_OPT_TYPE_CONST, {.dbl = NTSCJ}, 0, 0, AV_OPT_FLAG_DECODING_PARAM, "standard" },
{ "video_size", "A string describing frame size, such as 640x480 or hd720.", OFFSET(video_size), FF_OPT_TYPE_STRING, {.str = "vga"}, 0, 0, DEC },
{ "framerate", "", OFFSET(framerate), FF_OPT_TYPE_STRING, {.str = "ntsc"}, 0, 0, DEC },
{ NULL },
};