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

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Add gst_audio_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_audio_decoder_set_use_default_pad_acceptcaps
This commit is contained in:
Thiago Santos 2015-08-15 07:31:54 -03:00
parent 4982188cf7
commit 33b1da7b80
3 changed files with 50 additions and 16 deletions
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62
gst-libs/gst/audio/gstaudiodecoder.c
View file

@ -279,6 +279,9 @@ struct _GstAudioDecoderPrivate
/* pending serialized sink events, will be sent from finish_frame() */
GList *pending_events;
/* flags */
gboolean use_default_pad_acceptcaps;
};
//* Default channel layouts taken from audioconvert */
@ -2691,28 +2694,34 @@ gst_audio_decoder_sink_query_default (GstAudioDecoder * dec, GstQuery * query)
break;
}
case GST_QUERY_ACCEPT_CAPS:{
GstCaps *caps;
GstCaps *allowed_caps;
GstCaps *template_caps;
gboolean accept;
if (dec->priv->use_default_pad_acceptcaps) {
res =
gst_pad_query_default (GST_AUDIO_DECODER_SINK_PAD (dec),
GST_OBJECT_CAST (dec), query);
} else {
GstCaps *caps;
GstCaps *allowed_caps;
GstCaps *template_caps;
gboolean accept;
gst_query_parse_accept_caps (query, &caps);
gst_query_parse_accept_caps (query, &caps);
template_caps = gst_pad_get_pad_template_caps (pad);
accept = gst_caps_is_subset (caps, template_caps);
gst_caps_unref (template_caps);
template_caps = gst_pad_get_pad_template_caps (pad);
accept = gst_caps_is_subset (caps, template_caps);
gst_caps_unref (template_caps);
if (accept) {
allowed_caps = gst_pad_query_caps (GST_AUDIO_DECODER_SINK_PAD (dec),
caps);
if (accept) {
allowed_caps = gst_pad_query_caps (GST_AUDIO_DECODER_SINK_PAD (dec),
caps);
accept = gst_caps_can_intersect (caps, allowed_caps);
accept = gst_caps_can_intersect (caps, allowed_caps);
gst_caps_unref (allowed_caps);
gst_caps_unref (allowed_caps);
}
gst_query_set_accept_caps_result (query, accept);
res = TRUE;
}
gst_query_set_accept_caps_result (query, accept);
res = TRUE;
break;
}
case GST_QUERY_SEEKING:
@ -3611,3 +3620,24 @@ gst_audio_decoder_get_allocator (GstAudioDecoder * dec,
if (params)
*params = dec->priv->ctx.params;
}
/**
* gst_audio_decoder_set_use_default_pad_acceptcaps:
* @decoder: a #GstAudioDecoder
* @use: if the default pad accept-caps query handling should be used
*
* Lets #GstAudioDecoder 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_audio_decoder_set_use_default_pad_acceptcaps (GstAudioDecoder * decoder,
gboolean use)
{
decoder->priv->use_default_pad_acceptcaps = use;
}

3
gst-libs/gst/audio/gstaudiodecoder.h
View file

@ -397,6 +397,9 @@ void gst_audio_decoder_merge_tags (GstAudioDecoder * dec,
gboolean gst_audio_decoder_sink_query_default (GstAudioDecoder * dec,
GstQuery * query);
void gst_audio_decoder_set_use_default_pad_acceptcaps (GstAudioDecoder * decoder,
gboolean use);
G_END_DECLS
#endif /* _GST_AUDIO_DECODER_H_ */

1
win32/common/libgstaudio.def
View file

@ -67,6 +67,7 @@ EXPORTS
gst_audio_decoder_set_plc
gst_audio_decoder_set_plc_aware
gst_audio_decoder_set_tolerance
gst_audio_decoder_set_use_default_pad_acceptcaps
gst_audio_decoder_sink_query_default
gst_audio_downmix_meta_api_get_type
gst_audio_downmix_meta_get_info