Re: Testing audiomixer with GstHarness

Hi,

The audiomixer element has a thread, so you want to wait for it to do it's =
thing, you can use gst_harness_pull_until_eos() to wait for a buffer or EOS=
 event to be received instead of gst_harness_buffers_received() which doesn=
't wait.

Olivier


 ---- On Fri, 18 Oct 2024 03:43:01 -0400  Maxim Dzhura via gstreamer-devel =
 wrote ---=20
 > Hi all,
 >=20
 > I am trying to write a unit test for audiomixer using GstHarness. It
 > always fails, but succeeds when replace audiomixer for identity
 > element. I am using gstreamer 1.22.6, C++ and gtest. Here is the code:
 >=20
 > struct GstHarnessDeleter
 > {
 >     void operator()( GstHarness* h )
 >     {
 >         gst_harness_teardown( h );
 >     }
 > };
 >=20
 > using GstHarnessUPtr =3D std::unique_ptr;
 >=20
 > TEST( audiomixer, run )
 > {
 >     GstHarnessUPtr h( gst_harness_new_with_padnames( "audiomixer",
 > "sink_0", "src" ) );
 >     //GstHarnessUPtr h( gst_harness_new( "identity" ) ); <- passes
 >=20
 >     gst_harness_add_src_parse( h.get(), "audiotestsrc is-live=3Dtrue", T=
RUE );
 >=20
 >     gst_harness_set_src_caps_str( h.get(),
 > "audio/x-raw,format=3DS32LE,rate=3D44100,channels=3D2,layout=3Dinterleav=
ed" );
 >=20
 >     ASSERT_EQ( GST_FLOW_OK, gst_harness_src_crank_and_push_many(
 > h.get(), 1, 1) );
 >     ASSERT_EQ( 1, gst_harness_buffers_received( h.get() ) );
 > }
 >=20
 > The failure is
 > Expected equality of these values:
 >   1
 >   gst_harness_buffers_received( h.get() )
 >     Which is: 0
 >=20
 >=20
 > I checked buffers arriver to audiomixer sink pad with GST_SCHEDULE,
 > and audiomixer goes into PLAYING state. As well I check
 > audioaggregator and GST_PADS logs for extra sink pads, so I don't
 > think audiomixer is waiting for data.
 >=20
 > I run out of ideas why it doesn't work.
 >=20
 > Regards,
 > Maxim
 >=20
 > --=20
 > Maxim Dzhura
 >=20
--=20
Olivier Cr=C3=AAte
Multimedia Lead
[email protected]