[PATCH v2] qcap: implement and test VfwPin_CheckMediaType()

[Damjan Jovanovic]

VfwPin_CheckMediaType() always return a hardcoded E_NOTIMPL,
preventing any media format from being negotiated, and
limiting video capture devices from connecting to
many other filters.

Implement it and test.

In try 2, instead of the high-level test of connecting to
a NullRenderer, more elaborate lower-level testing is done:
we test that the device can accept all of its own media types,
and prove that AM_MEDIA_TYPEs of NULL, GUID_NULL,
FORMAT_Empty, and a NULL pbFormat, all fail. The
implementation matches results obtained by testing against
2 webcams on Windows. Also coding style was cleaned up.

Signed-off-by: Damjan Jovanovic <damjan.jov(a)gmail.com>
---
 dlls/qcap/capture.h            |   1 +
 dlls/qcap/tests/Makefile.in    |   3 +-
 dlls/qcap/tests/videocapture.c | 149 +++++++++++++++++++++++++++++++++
 dlls/qcap/v4l.c                |  50 +++++++++--
 dlls/qcap/vfwcapture.c         |   4 +-
 5 files changed, 198 insertions(+), 9 deletions(-)
 create mode 100644 dlls/qcap/tests/videocapture.c

[Zebediah Figura]

On 4/24/19 1:18 AM, Damjan Jovanovic wrote:
> +    memset(&empty_media_type, 0, sizeof(empty_media_type));
> +    hr = IPin_QueryAccept(pin, &empty_media_type);
> +    ok(hr != S_OK, "Got hr %#x.\n", hr);
> +
> +    empty_media_type.majortype = MEDIATYPE_Video;
> +    hr = IPin_QueryAccept(pin, &empty_media_type);
> +    ok(hr != S_OK, "Got hr %#x.\n", hr);
> +
> +    empty_media_type.formattype = FORMAT_VideoInfo;
> +    hr = IPin_QueryAccept(pin, &empty_media_type);
> +    ok(hr != S_OK, "Got hr %#x.\n", hr);
> +
> +    empty_media_type.formattype = FORMAT_None;
> +    hr = IPin_QueryAccept(pin, &empty_media_type);
> +    ok(hr != S_OK, "Got hr %#x.\n", hr);

Is it possible to test for S_FALSE directly here? I unfortunately don't 
have a camera with me at the moment to test.

[Damjan Jovanovic]

On Mon, Apr 29, 2019 at 2:28 AM Zebediah Figura <z.figura12(a)gmail.com>
wrote:
> On 4/24/19 1:18 AM, Damjan Jovanovic wrote:
> > +    memset(&empty_media_type, 0, sizeof(empty_media_type));
> > +    hr = IPin_QueryAccept(pin, &empty_media_type);
> > +    ok(hr != S_OK, "Got hr %#x.\n", hr);
> > +
> > +    empty_media_type.majortype = MEDIATYPE_Video;
> > +    hr = IPin_QueryAccept(pin, &empty_media_type);
> > +    ok(hr != S_OK, "Got hr %#x.\n", hr);
> > +
> > +    empty_media_type.formattype = FORMAT_VideoInfo;
> > +    hr = IPin_QueryAccept(pin, &empty_media_type);
> > +    ok(hr != S_OK, "Got hr %#x.\n", hr);
> > +
> > +    empty_media_type.formattype = FORMAT_None;
> > +    hr = IPin_QueryAccept(pin, &empty_media_type);
> > +    ok(hr != S_OK, "Got hr %#x.\n", hr);
>
> Is it possible to test for S_FALSE directly here? I unfortunately don't
> have a camera with me at the moment to test.
>
> Mine returns E_FAIL and others.