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x11grab: 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 3102fb0351
commit 724a900c45
1 changed files with 39 additions and 9 deletions
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48
libavdevice/x11grab.c
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@ -37,6 +37,9 @@
#include "config.h"
#include "libavformat/avformat.h"
#include "libavutil/log.h"
#include "libavutil/opt.h"
#include "libavutil/parseutils.h"
#include <time.h>
#include <X11/X.h>
#include <X11/Xlib.h>
@ -52,10 +55,12 @@
*/
struct x11_grab
{
const AVClass *class; /**< Class for private options. */
int frame_size; /**< Size in bytes of a grabbed frame */
AVRational time_base; /**< Time base */
int64_t time_frame; /**< Current time */
char *video_size; /**< String describing video size, set by a private option. */
int height; /**< Height of the grab frame */
int width; /**< Width of the grab frame */
int x_off; /**< Horizontal top-left corner coordinate */
@ -101,7 +106,18 @@ x11grab_read_header(AVFormatContext *s1, AVFormatParameters *ap)
*offset= 0;
}
av_log(s1, AV_LOG_INFO, "device: %s -> display: %s x: %d y: %d width: %d height: %d\n", s1->filename, param, x_off, y_off, ap->width, ap->height);
if ((ret = av_parse_video_size(&x11grab->width, &x11grab->height, x11grab->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)
x11grab->width = ap->width;
if (ap->height > 0)
x11grab->height = ap->height;
#endif
av_log(s1, AV_LOG_INFO, "device: %s -> display: %s x: %d y: %d width: %d height: %d\n",
s1->filename, param, x_off, y_off, x11grab->width, x11grab->height);
dpy = XOpenDisplay(param);
if(!dpy) {
@ -110,7 +126,7 @@ x11grab_read_header(AVFormatContext *s1, AVFormatParameters *ap)
goto out;
}
if (ap->width <= 0 || ap->height <= 0 || ap->time_base.den <= 0) {
if (ap->time_base.den <= 0) {
av_log(s1, AV_LOG_ERROR, "AVParameters don't have video size and/or rate. Use -s and -r.\n");
ret = AVERROR(EINVAL);
goto out;
@ -134,7 +150,7 @@ x11grab_read_header(AVFormatContext *s1, AVFormatParameters *ap)
ZPixmap,
NULL,
&x11grab->shminfo,
ap->width, ap->height);
x11grab->width, x11grab->height);
x11grab->shminfo.shmid = shmget(IPC_PRIVATE,
image->bytes_per_line * image->height,
IPC_CREAT|0777);
@ -155,7 +171,7 @@ x11grab_read_header(AVFormatContext *s1, AVFormatParameters *ap)
} else {
image = XGetImage(dpy, RootWindow(dpy, DefaultScreen(dpy)),
x_off,y_off,
ap->width,ap->height,
x11grab->width, x11grab->height,
AllPlanes, ZPixmap);
}
@ -222,10 +238,8 @@ x11grab_read_header(AVFormatContext *s1, AVFormatParameters *ap)
goto out;
}
x11grab->frame_size = ap->width * ap->height * image->bits_per_pixel/8;
x11grab->frame_size = x11grab->width * x11grab->height * image->bits_per_pixel/8;
x11grab->dpy = dpy;
x11grab->width = ap->width;
x11grab->height = ap->height;
x11grab->time_base = ap->time_base;
x11grab->time_frame = av_gettime() / av_q2d(ap->time_base);
x11grab->x_off = x_off;
@ -235,13 +249,14 @@ x11grab_read_header(AVFormatContext *s1, AVFormatParameters *ap)
st->codec->codec_type = AVMEDIA_TYPE_VIDEO;
st->codec->codec_id = CODEC_ID_RAWVIDEO;
st->codec->width = ap->width;
st->codec->height = ap->height;
st->codec->width = x11grab->width;
st->codec->height = x11grab->height;
st->codec->pix_fmt = input_pixfmt;
st->codec->time_base = ap->time_base;
st->codec->bit_rate = x11grab->frame_size * 1/av_q2d(ap->time_base) * 8;
out:
av_freep(&x11grab->video_size);
return ret;
}
@ -449,6 +464,20 @@ x11grab_read_close(AVFormatContext *s1)
return 0;
}
#define OFFSET(x) offsetof(struct x11_grab, x)
#define DEC AV_OPT_FLAG_DECODING_PARAM
static const AVOption options[] = {
{ "video_size", "A string describing frame size, such as 640x480 or hd720.", OFFSET(video_size), FF_OPT_TYPE_STRING, {.str = "vga"}, 0, 0, DEC },
{ NULL },
};
static const AVClass x11_class = {
.class_name = "X11grab indev",
.item_name = av_default_item_name,
.option = options,
.version = LIBAVUTIL_VERSION_INT,
};
/** x11 grabber device demuxer declaration */
AVInputFormat ff_x11_grab_device_demuxer =
{
@ -460,4 +489,5 @@ AVInputFormat ff_x11_grab_device_demuxer =
x11grab_read_packet,
x11grab_read_close,
.flags = AVFMT_NOFILE,
.priv_class = &x11_class,
};