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lavd/fbdev_enc: implement get_device_list

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Signed-off-by: Lukasz Marek <lukasz.m.luki2@gmail.com>
This commit is contained in:
Lukasz Marek 2014-04-12 19:25:33 +02:00
parent c1c3c3611e
commit afc898e7ce
1 changed files with 63 additions and 0 deletions
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63
libavdevice/fbdev_enc.c
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@ -29,6 +29,7 @@
#include "libavutil/opt.h"
#include "libavformat/avformat.h"
#include "fbdev_common.h"
#include "avdevice.h"
typedef struct {
AVClass *class; ///< class for private options
@ -183,6 +184,67 @@ static av_cold int fbdev_write_trailer(AVFormatContext *h)
return 0;
}
static int fbdev_get_device_list(AVFormatContext *s, AVDeviceInfoList *device_list)
{
struct fb_var_screeninfo varinfo;
struct fb_fix_screeninfo fixinfo;
char device_file[12];
AVDeviceInfo *device = NULL;
int i, fd = -1, ret = 0;
const char *default_device = ff_fbdev_default_device();
if (!device_list)
return AVERROR(EINVAL);
for (i = 0; i <= 31; i++) {
snprintf(device_file, sizeof(device_file), "/dev/fb%d", i);
if ((fd = avpriv_open(device_file, O_RDWR)) < 0)
continue;
if (ioctl(fd, FBIOGET_VSCREENINFO, &varinfo) == -1)
goto fail_device;
if (ioctl(fd, FBIOGET_FSCREENINFO, &fixinfo) == -1)
goto fail_device;
device = av_mallocz(sizeof(AVDeviceInfo));
if (!device) {
ret = AVERROR(ENOMEM);
goto fail_device;
}
device->device_name = av_strdup(device_file);
device->device_description = av_strdup(fixinfo.id);
if (!device->device_name || !device->device_description) {
ret = AVERROR(ENOMEM);
goto fail_device;
}
if ((ret = av_dynarray_add_nofree(&device_list->devices,
&device_list->nb_devices, device)) < 0)
goto fail_device;
if (default_device && !strcmp(device->device_name, default_device)) {
device_list->default_device = device_list->nb_devices - 1;
default_device = NULL;
}
continue;
fail_device:
if (device) {
av_free(device->device_name);
av_free(device->device_description);
av_freep(&device);
}
if (fd >= 0) {
close(fd);
fd = -1;
}
if (ret < 0)
return ret;
}
return 0;
}
#define OFFSET(x) offsetof(FBDevContext, x)
#define ENC AV_OPT_FLAG_ENCODING_PARAM
static const AVOption options[] = {
@ -208,6 +270,7 @@ AVOutputFormat ff_fbdev_muxer = {
.write_header = fbdev_write_header,
.write_packet = fbdev_write_packet,
.write_trailer = fbdev_write_trailer,
.get_device_list = fbdev_get_device_list,
.flags = AVFMT_NOFILE | AVFMT_VARIABLE_FPS | AVFMT_NOTIMESTAMPS,
.priv_class = &fbdev_class,
};