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make webcams work; video input channel = 0

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This commit is contained in:
niels
2011-04-05 21:28:30 +02:00
parent 3666cc9218
commit cb655ceb4e
1 changed files with 49 additions and 5 deletions
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54
veejay-current/veejay-server/libstream/v4l2utils.c
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@@ -238,8 +238,8 @@ static int v4l2_enum_video_standards( v4l2info *v, char norm )
int std_id = (norm == 'p' ? V4L2_STD_PAL: V4L2_STD_NTSC);
if (-1 == ioctl (v->fd, VIDIOC_S_STD, &std_id)) {
veejay_msg(VEEJAY_MSG_ERROR, "v4l2: unable to set video standard.");
return 0;
veejay_msg(VEEJAY_MSG_WARNING, "v4l2: unable to set video standard.");
return 1;//@ show must go on
} else {
veejay_msg(VEEJAY_MSG_INFO,"v4l2: set video standard PAL");
}
@@ -401,6 +401,38 @@ VJFrame *v4l2_get_dst( void *vv, uint8_t *Y, uint8_t *U, uint8_t *V ) {
return v->dst;
}
static int v4l2_channel_choose( v4l2info *v, const int pref_channel )
{
int chan = pref_channel;
int n = 0;
int i;
int pref_ok = 0;
int other = -1;
for ( i = 0; i < (pref_channel+1); i ++ ) {
if( -1 == vioctl( v->fd, VIDIOC_S_INPUT, &i )) {
#ifdef STRICT_CHECKING
veejay_msg(VEEJAY_MSG_DEBUG, "Input channel %d does not exist", i);
#endif
if( errno == EINVAL )
continue;
return 0;
} else {
#ifdef STRICT_CHECKING
veejay_msg(VEEJAY_MSG_DEBUG, "Input channel %d is valid.",i);
#endif
if(pref_channel==i)
pref_ok = 1;
else
other = i;
}
}
if( pref_ok )
return pref_channel;
return other;
}
void *v4l2open ( const char *file, const int input_channel, int host_fmt, int wid, int hei, float fps, char norm )
{
@@ -447,13 +479,25 @@ void *v4l2open ( const char *file, const int input_channel, int host_fmt, int wi
v->capability.card );
//@ which video input ?
int chan = input_channel;
if( -1 == vioctl( fd, VIDIOC_S_INPUT, &chan )) {
veejay_msg(0, "v4l2: VIDIOC_S_INPUT failed with %s", strerror(errno));
int chan = v4l2_channel_choose( v, input_channel );
if(chan == -1) {
veejay_msg(0, "v4l2: Video device has no input channels ? What video device is that?");
free(v);
close(fd);
return NULL;
}
if( -1 == vioctl( fd, VIDIOC_S_INPUT, &chan )) {
int lvl = 0;
if( errno == EINVAL )
lvl = VEEJAY_MSG_WARNING;
veejay_msg(0, "v4l2: VIDIOC_S_INPUT failed with %s, arg was %x", strerror(errno),chan);
if( errno != EINVAL ) {
free(v);
close(fd);
return NULL;
}
}
v->input.index = chan;
if( -1 == vioctl( fd, VIDIOC_ENUMINPUT, &(v->input)) ) {