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videodecoder: add option to use default pad accept-caps handling

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Add gst_video_decoder_set_use_default_pad_acceptcaps() to allow
subclasses to make videodecoder use the default pad acceptcaps
handling instead of resorting to the caps query that is, usually,
less efficient and unecessary

API: gst_video_decoder_set_use_default_pad_acceptcaps
This commit is contained in:
Thiago Santos 2015-08-15 07:20:25 -03:00
parent 95eb641821
commit 4982188cf7
3 changed files with 50 additions and 16 deletions
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34
gst-libs/gst/video/gstvideodecoder.c
View file

@ -421,6 +421,9 @@ struct _GstVideoDecoderPrivate
GstTagList *tags;
gboolean tags_changed;
/* flags */
gboolean use_default_pad_acceptcaps;
};
static GstElementClass *parent_class = NULL;
@ -1862,6 +1865,11 @@ gst_video_decoder_sink_query_default (GstVideoDecoder * decoder,
break;
}
case GST_QUERY_ACCEPT_CAPS:{
if (decoder->priv->use_default_pad_acceptcaps) {
res =
gst_pad_query_default (GST_VIDEO_DECODER_SINK_PAD (decoder),
GST_OBJECT_CAST (decoder), query);
} else {
GstCaps *caps;
GstCaps *allowed_caps;
GstCaps *template_caps;
@ -1874,8 +1882,8 @@ gst_video_decoder_sink_query_default (GstVideoDecoder * decoder,
gst_caps_unref (template_caps);
if (accept) {
allowed_caps = gst_pad_query_caps (GST_VIDEO_DECODER_SINK_PAD (decoder),
caps);
allowed_caps =
gst_pad_query_caps (GST_VIDEO_DECODER_SINK_PAD (decoder), caps);
accept = gst_caps_can_intersect (caps, allowed_caps);
@ -1884,6 +1892,7 @@ gst_video_decoder_sink_query_default (GstVideoDecoder * decoder,
gst_query_set_accept_caps_result (query, accept);
res = TRUE;
}
break;
}
default:
@ -4293,3 +4302,24 @@ gst_video_decoder_get_allocator (GstVideoDecoder * decoder,
if (params)
*params = decoder->priv->params;
}
/**
* gst_video_decoder_set_use_default_pad_acceptcaps:
* @decoder: a #GstVideoDecoder
* @use: if the default pad accept-caps query handling should be used
*
* Lets #GstVideoDecoder sub-classes decide if they want the sink pad
* to use the default pad query handler to reply to accept-caps queries.
*
* By setting this to true it is possible to further customize the default
* handler with %GST_PAD_SET_ACCEPT_INTERSECT and
* %GST_PAD_SET_ACCEPT_TEMPLATE
*
* Since: 1.6
*/
void
gst_video_decoder_set_use_default_pad_acceptcaps (GstVideoDecoder * decoder,
gboolean use)
{
decoder->priv->use_default_pad_acceptcaps = use;
}

3
gst-libs/gst/video/gstvideodecoder.h
View file

@ -427,6 +427,9 @@ GstCaps * gst_video_decoder_proxy_getcaps (GstVideoDecoder * decoder,
gboolean gst_video_decoder_sink_query_default (GstVideoDecoder * decoder,
GstQuery * query);
void gst_video_decoder_set_use_default_pad_acceptcaps (GstVideoDecoder * decoder,
gboolean use);
G_END_DECLS

1
win32/common/libgstvideo.def
View file

@ -129,6 +129,7 @@ EXPORTS
gst_video_decoder_set_needs_format
gst_video_decoder_set_output_state
gst_video_decoder_set_packetized
gst_video_decoder_set_use_default_pad_acceptcaps
gst_video_decoder_sink_query_default
gst_video_dither_flags_get_type
gst_video_dither_free