Add latency to jack position.

Also fixed issue with re-sampler latency calculation, as jack backend the frame latency is returned in stream source samples, unlike wasapi which returns in output samples.

Author: mdsitton

src/cubeb_jack.cpp

@@ -654,7 +654,7 @@ cbjack_get_max_channel_count(cubeb * /*ctx*/, uint32_t * max_channels)
 static int
 cbjack_get_latency(cubeb_stream * stm, unsigned int * latency)
 {
-  *latency = stm->context->jack_latency + cubeb_resampler_latency(stm->resampler.get());
+  *latency = stm->context->jack_latency + ceil(cubeb_resampler_latency(stm->resampler.get()) * stm->ratio);
   return CUBEB_OK;
 }
 
@@ -947,7 +947,7 @@ cbjack_stream_stop(cubeb_stream * stream)
 static int
 cbjack_stream_get_position(cubeb_stream * stream, uint64_t * position)
 {
-  *position = stream->position;
+  *position = stream->position - ceil(cubeb_resampler_latency(stream->resampler.get()) * stream->ratio);
   return CUBEB_OK;
 }