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winegstreamer: Check the format GUID, size, and pointer in amt_to_gst_caps(). 

Some application filters enumerate types without a format block.

Signed-off-by: Zebediah Figura <z.figura12@gmail.com>
Signed-off-by: Alexandre Julliard <julliard@winehq.org>
This commit is contained in:
Zebediah Figura 2020-04-05 19:43:35 -05:00 committed by Alexandre Julliard
parent 0c1d931243
commit ac531be92e
1 changed files with 8 additions and 0 deletions
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8
dlls/winegstreamer/gstdemux.c
View File

@ -387,6 +387,10 @@ static GstCaps *amt_to_gst_caps_video(const AM_MEDIA_TYPE *mt)
unsigned int i;
GstCaps *caps;
if (!IsEqualGUID(&mt->formattype, &FORMAT_VideoInfo)
|| mt->cbFormat < sizeof(VIDEOINFOHEADER) || !mt->pbFormat)
return NULL;
for (i = 0; i < ARRAY_SIZE(format_map); ++i)
{
if (IsEqualGUID(&mt->subtype, format_map[i].subtype))
@ -425,6 +429,10 @@ static GstCaps *amt_to_gst_caps_audio(const AM_MEDIA_TYPE *mt)
GstAudioFormat format = GST_AUDIO_FORMAT_UNKNOWN;
GstAudioInfo info;
if (!IsEqualGUID(&mt->formattype, &FORMAT_WaveFormatEx)
|| mt->cbFormat < sizeof(WAVEFORMATEX) || !mt->pbFormat)
return NULL;
if (IsEqualGUID(&mt->subtype, &MEDIASUBTYPE_PCM))
format = gst_audio_format_build_integer(wfx->wBitsPerSample != 8,
G_LITTLE_ENDIAN, wfx->wBitsPerSample, wfx->wBitsPerSample);