On Mon, Oct 21, 2013 at 12:28 AM, Maksym Veremeyenko <ve...@m1stereo.tv> wrote:
> 19.10.13 04:39, Dan Dennedy написав(ла):
>
>> On Thu, Oct 17, 2013 at 9:14 AM, Maksym Veremeyenko<ve...@m1stereo.tv>
>> wrote:
>>>
>>> Hi,
>>>
>>> attached patch prevent start new (or additional)
>>> consumer_read_ahead_start
>>> from avformat consumer during stopping/closing consumer.
>>
>>
>> I do not like that you removed "priv->ahead = 0;" from
>> mlt_consumer_stop(). Please explain; was that really necessary to fix
>> your problem? The other parts look good.
>
>
> first it:
>
> 1598: // Cancel the read ahead threads
> 1598: priv->ahead = 0;
>
> and then trying to stop consumer module thread:
>
> 1609: // Invoke the child callback
> 1610: if ( self->stop != NULL )
> 1611: self->stop( self );
>
> and it waiting for thread finished. internal consumer thread is trying to
> call mlt_consumer_rt_frame. that function if priv->ahead is not running and
> trying to call consumer_read_ahead_start
>
> 1521: if ( priv->ahead == 0 )
> 1522: {
> 1523: int buffer = mlt_properties_get_int(
> properties, "buffer" );
> 1524: int prefill = mlt_properties_get_int(
> properties, "prefill" );
> 1525: consumer_read_ahead_start( self );
> 1526: if ( buffer > 1 )
> 1527: size = prefill > 0 && prefill < buffer
> ? prefill : buffer;
> 1528: }
>
> that successfully starting consumer_read_ahead_thread again:
>
> 1089: if ( pthread_create( &priv->ahead_thread,
> &thread_attributes, consumer_read_ahead_thread, self ) < 0 )
> 1090: pthread_create( &priv->ahead_thread, NULL,
> consumer_read_ahead_thread, self );
>
> or
>
> 1095: pthread_create( &priv->ahead_thread, NULL,
> consumer_read_ahead_thread, self );
>
> my patch trying to prevent that behaviour by /two hands/ and i think
> checking priv->started could be enough - at least i will hardly check it in
> a day or two...
>
Are you calling mlt_consumer_stop() and mlt_consumer_start() from 2
different threads?
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