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videoconvert: add PeerFormats support

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Make a new PeerFormats param that can be set on ports to let it know
about the possible peer formats. This can be used by converters to calculate
an optimum conversion.

make the videoadpter query the follower formats, simplify them and then
set them as PeerFormats on the converter.

Implement peerformats in videoconvert. This makes EnumFormat on the port
depend on the negotiated format of the peer. It will suggest a Format
that most closely matches the current negotiated format with the available
PeerFormats. This then makes it possible to negotiate to the format that
would require the least amount of conversions.
This commit is contained in:
Wim Taymans 2025-05-05 10:49:35 +02:00
parent 46d376cb78
commit 1904521a4d
5 changed files with 643 additions and 108 deletions
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1
spa/include/spa/param/param-types.h
View file

@ -41,6 +41,7 @@ static const struct spa_type_info spa_type_param[] = {
{ SPA_PARAM_Latency, SPA_TYPE_OBJECT_ParamLatency, SPA_TYPE_INFO_PARAM_ID_BASE "Latency", NULL },
{ SPA_PARAM_ProcessLatency, SPA_TYPE_OBJECT_ParamProcessLatency, SPA_TYPE_INFO_PARAM_ID_BASE "ProcessLatency", NULL },
{ SPA_PARAM_Tag, SPA_TYPE_OBJECT_ParamTag, SPA_TYPE_INFO_PARAM_ID_BASE "Tag", NULL },
{ SPA_PARAM_PeerFormats, SPA_TYPE_Struct, SPA_TYPE_INFO_PARAM_ID_BASE "PeerFormats", NULL },
{ 0, 0, NULL, NULL },
};

1
spa/include/spa/param/param.h
View file

@ -40,6 +40,7 @@ enum spa_param_type {
SPA_PARAM_Latency, /**< latency reporting, a SPA_TYPE_OBJECT_ParamLatency */
SPA_PARAM_ProcessLatency, /**< processing latency, a SPA_TYPE_OBJECT_ParamProcessLatency */
SPA_PARAM_Tag, /**< tag reporting, a SPA_TYPE_OBJECT_ParamTag. Since 0.3.79 */
SPA_PARAM_PeerFormats, /**< peer formats, a SPA_TYPE_Struct of SPA_TYPE_OBJECT_Format. Since 1.5.0 */
};
/** information about a parameter */