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lavd: fix iterating of input and output devices

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In the previous implementation the first input or output device
was skipped when device_next was called with prev = NULL

Signed-off-by: Felix Matouschek <felix@matouschek.org>
Signed-off-by: Timo Rothenpieler <timo@rothenpieler.org>
This commit is contained in:
Felix Matouschek 2018-03-14 13:14:07 +01:00 committed by Timo Rothenpieler
parent 3e7fa34d3b
commit ce1d77a5e7
1 changed files with 2 additions and 5 deletions
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7
libavdevice/alldevices.c
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@ -126,16 +126,13 @@ static void *device_next(void *prev, int output,
ff_thread_once(&av_device_next_init, av_device_init_next);
if (!prev && !(prev = (output ? (void*)outdev_list[0] : (void*)indev_list[0])))
return NULL;
do {
if (output) {
if (!(prev = ((AVOutputFormat *)prev)->next))
if (!(prev = prev ? ((AVOutputFormat *)prev)->next : (void*)outdev_list[0]))
break;
pc = ((AVOutputFormat *)prev)->priv_class;
} else {
if (!(prev = ((AVInputFormat *)prev)->next))
if (!(prev = prev ? ((AVInputFormat *)prev)->next : (void*)indev_list[0]))
break;
pc = ((AVInputFormat *)prev)->priv_class;
}