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video_out: fix crash when VO autoselection fails

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init_best_video_out() did not manage the memory for vo->window_title
correctly, and free'd it twice when initialization failed (that's due
to talloc_free_children() being called). When the next VO was tried,
it reused the dangling pointer. Initialize this member somewhere else
lazily instead.
This commit is contained in:
wm4 2012-08-16 16:18:51 +02:00
parent 850f2b4511
commit 1b7b0c93a8
1 changed files with 3 additions and 2 deletions
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5
libvo/video_out.c
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@ -306,7 +306,6 @@ struct vo *init_best_video_out(struct MPOpts *opts,
.input_ctx = input_ctx,
.event_fd = -1,
.registered_fd = -1,
.window_title = talloc_strdup(vo, ""),
};
// first try the preferred drivers, with their optional subdevice param:
if (vo_list && vo_list[0])
@ -351,7 +350,7 @@ struct vo *init_best_video_out(struct MPOpts *opts,
return vo; // success!
talloc_free_children(vo);
}
free(vo);
talloc_free(vo);
return NULL;
}
@ -488,6 +487,8 @@ void calc_src_dst_rects(struct vo *vo, int src_width, int src_height,
// you need to keep the string for an extended period of time.
const char *vo_get_window_title(struct vo *vo)
{
if (!vo->window_title)
vo->window_title = talloc_strdup(vo, "");
return vo->window_title;
}