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winegstreamer: Explicitly store a GstCaps pointer in the parser_source structure. 

gst_pad_get_current_caps() is not guaranteed to return the updated caps when
GST_EVENT_CAPS is handled by the event handler, or even after
gst_pad_event_default(). The actual implementation of gst_pad_send_event() in
fact sets it later. Avoid a potential race condition by using our own caps
pointer.

Signed-off-by: Zebediah Figura <z.figura12@gmail.com>
Signed-off-by: Alexandre Julliard <julliard@winehq.org>
This commit is contained in:
Zebediah Figura 2021-01-15 17:59:19 -06:00 committed by Alexandre Julliard
parent 85d81ae9a9
commit c38fcd19b3
1 changed files with 13 additions and 23 deletions
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36
dlls/winegstreamer/gstdemux.c
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@ -83,6 +83,7 @@ struct parser_source
GstElement *flip;
HANDLE caps_event, eos_event;
GstSegment *segment;
GstCaps *caps;
SourceSeeking seek;
};
@ -720,9 +721,12 @@ static gboolean event_sink(GstPad *pad, GstObject *parent, GstEvent *event)
break;
case GST_EVENT_CAPS:
{
gboolean ret = gst_pad_event_default(pad, parent, event);
GstCaps *caps;
gst_event_parse_caps(event, &caps);
gst_caps_replace(&pin->caps, caps);
SetEvent(pin->caps_event);
return ret;
break;
}
default:
WARN("Ignoring \"%s\" event.\n", GST_EVENT_TYPE_NAME(event));
@ -1712,7 +1716,7 @@ static HRESULT decodebin_parser_source_query_accept(struct parser_source *pin, c
static HRESULT decodebin_parser_source_get_media_type(struct parser_source *pin,
unsigned int index, AM_MEDIA_TYPE *mt)
{
GstCaps *caps = gst_pad_get_current_caps(pin->my_sink);
const GstCaps *caps = pin->caps;
const GstStructure *structure;
const char *type;
@ -1744,10 +1748,7 @@ static HRESULT decodebin_parser_source_get_media_type(struct parser_source *pin,
if (amt_from_gst_caps(caps, mt))
{
if (!index--)
{
gst_caps_unref(caps);
return S_OK;
}
FreeMediaType(mt);
}
@ -1756,7 +1757,6 @@ static HRESULT decodebin_parser_source_get_media_type(struct parser_source *pin,
gint width, height, fps_n, fps_d;
GstVideoInfo info;
gst_caps_unref(caps);
gst_structure_get_int(structure, "width", &width);
gst_structure_get_int(structure, "height", &height);
gst_video_info_set_format(&info, video_formats[index], width, height);
@ -1774,7 +1774,6 @@ static HRESULT decodebin_parser_source_get_media_type(struct parser_source *pin,
GstAudioInfo info;
gint rate;
gst_caps_unref(caps);
gst_structure_get_int(structure, "rate", &rate);
gst_audio_info_set_format(&info, GST_AUDIO_FORMAT_S16LE, rate, 2, NULL);
if (!amt_from_gst_audio_info(&info, mt))
@ -1782,7 +1781,6 @@ static HRESULT decodebin_parser_source_get_media_type(struct parser_source *pin,
return S_OK;
}
gst_caps_unref(caps);
return VFW_S_NO_MORE_ITEMS;
}
@ -2406,20 +2404,12 @@ static BOOL wave_parser_init_gst(struct parser *filter)
return TRUE;
}
static gboolean get_source_amt(const struct parser_source *pin, AM_MEDIA_TYPE *mt)
{
GstCaps *caps = gst_pad_get_current_caps(pin->my_sink);
gboolean ret = amt_from_gst_caps(caps, mt);
gst_caps_unref(caps);
return ret;
}
static HRESULT wave_parser_source_query_accept(struct parser_source *pin, const AM_MEDIA_TYPE *mt)
{
AM_MEDIA_TYPE pad_mt;
HRESULT hr;
if (!get_source_amt(pin, &pad_mt))
if (!amt_from_gst_caps(pin->caps, &pad_mt))
return E_OUTOFMEMORY;
hr = compare_media_types(mt, &pad_mt) ? S_OK : S_FALSE;
FreeMediaType(&pad_mt);
@ -2431,7 +2421,7 @@ static HRESULT wave_parser_source_get_media_type(struct parser_source *pin,
{
if (index > 0)
return VFW_S_NO_MORE_ITEMS;
if (!get_source_amt(pin, mt))
if (!amt_from_gst_caps(pin->caps, mt))
return E_OUTOFMEMORY;
return S_OK;
}
@ -2538,7 +2528,7 @@ static HRESULT avi_splitter_source_query_accept(struct parser_source *pin, const
AM_MEDIA_TYPE pad_mt;
HRESULT hr;
if (!get_source_amt(pin, &pad_mt))
if (!amt_from_gst_caps(pin->caps, &pad_mt))
return E_OUTOFMEMORY;
hr = compare_media_types(mt, &pad_mt) ? S_OK : S_FALSE;
FreeMediaType(&pad_mt);
@ -2550,7 +2540,7 @@ static HRESULT avi_splitter_source_get_media_type(struct parser_source *pin,
{
if (index > 0)
return VFW_S_NO_MORE_ITEMS;
if (!get_source_amt(pin, mt))
if (!amt_from_gst_caps(pin->caps, mt))
return E_OUTOFMEMORY;
return S_OK;
}
@ -2671,7 +2661,7 @@ static HRESULT mpeg_splitter_source_query_accept(struct parser_source *pin, cons
AM_MEDIA_TYPE pad_mt;
HRESULT hr;
if (!get_source_amt(pin, &pad_mt))
if (!amt_from_gst_caps(pin->caps, &pad_mt))
return E_OUTOFMEMORY;
hr = compare_media_types(mt, &pad_mt) ? S_OK : S_FALSE;
FreeMediaType(&pad_mt);
@ -2683,7 +2673,7 @@ static HRESULT mpeg_splitter_source_get_media_type(struct parser_source *pin,
{
if (index > 0)
return VFW_S_NO_MORE_ITEMS;
if (!get_source_amt(pin, mt))
if (!amt_from_gst_caps(pin->caps, mt))
return E_OUTOFMEMORY;
return S_OK;
}