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lavd/fbdev_enc: add default device 

Use device specified by environment variable FRAMEBUFFER or /dev/fb0 as default.

Signed-off-by: Lukasz Marek <lukasz.m.luki@gmail.com>
This commit is contained in:
Lukasz Marek 2013-11-07 19:06:38 +01:00
parent 90539cea33
commit fa3bfeb1c1
3 changed files with 20 additions and 2 deletions
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10
libavdevice/fbdev_common.c
View File

@ -20,6 +20,7 @@
* Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA
*/
#include <stdlib.h>
#include "fbdev_common.h"
#include "libavutil/common.h"
@ -55,3 +56,12 @@ enum AVPixelFormat ff_get_pixfmt_from_fb_varinfo(struct fb_var_screeninfo *varin
return AV_PIX_FMT_NONE;
}
const char* ff_fbdev_default_device()
{
const char *dev = getenv("FRAMEBUFFER");
if (!dev)
dev = "/dev/fb0";
return dev;
}

2
libavdevice/fbdev_common.h
View File

@ -29,4 +29,6 @@
enum AVPixelFormat ff_get_pixfmt_from_fb_varinfo(struct fb_var_screeninfo *varinfo);
const char* ff_fbdev_default_device(void);
#endif /* AVDEVICE_FBDEV_COMMON_H */

10
libavdevice/fbdev_enc.c
View File

@ -45,17 +45,23 @@ static av_cold int fbdev_write_header(AVFormatContext *h)
FBDevContext *fbdev = h->priv_data;
enum AVPixelFormat pix_fmt;
int ret, flags = O_RDWR;
const char* device;
if (h->nb_streams != 1 || h->streams[0]->codec->codec_type != AVMEDIA_TYPE_VIDEO) {
av_log(fbdev, AV_LOG_ERROR, "Only a single video stream is supported.\n");
return AVERROR(EINVAL);
}
if ((fbdev->fd = avpriv_open(h->filename, flags)) == -1) {
if (h->filename[0])
device = h->filename;
else
device = ff_fbdev_default_device();
if ((fbdev->fd = avpriv_open(device, flags)) == -1) {
ret = AVERROR(errno);
av_log(h, AV_LOG_ERROR,
"Could not open framebuffer device '%s': %s\n",
h->filename, av_err2str(ret));
device, av_err2str(ret));
return ret;
}