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	pod: improve the vararg pod builder and parser
Automatically parse and build key/value when in objects without having to prefix the key with ":" Automatically build control/value when in sequence without the "." prefix. Remove the builder with key/pod, taking a reference to the stack built temporary pods is not allowed in c++. We can use the varargs version with the same convenient syntax. Remove the parser "*" option, it is unused. Improve spa_pod_builder_add_* and spa_pod_parser_get_* and make them look similar.
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					 59 changed files with 1833 additions and 2005 deletions
				
			
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			@ -336,14 +336,13 @@ static int port_enum_formats(struct spa_node *node,
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			*param = spa_format_audio_raw_build(builder, SPA_PARAM_EnumFormat,
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					&this->format.info.raw);
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		} else {
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			*param = spa_pod_builder_object(builder,
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			*param = spa_pod_builder_add_object(builder,
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				SPA_TYPE_OBJECT_Format, SPA_PARAM_EnumFormat,
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				SPA_FORMAT_mediaType,      &SPA_POD_Id(SPA_MEDIA_TYPE_audio),
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				SPA_FORMAT_mediaSubtype,   &SPA_POD_Id(SPA_MEDIA_SUBTYPE_raw),
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				SPA_FORMAT_AUDIO_format,   &SPA_POD_Id(SPA_AUDIO_FORMAT_F32P),
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				SPA_FORMAT_AUDIO_rate,     &SPA_POD_CHOICE_RANGE_Int(44100, 1, INT32_MAX),
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				SPA_FORMAT_AUDIO_channels, &SPA_POD_Int(1),
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				0);
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				SPA_FORMAT_mediaType,      SPA_POD_Id(SPA_MEDIA_TYPE_audio),
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				SPA_FORMAT_mediaSubtype,   SPA_POD_Id(SPA_MEDIA_SUBTYPE_raw),
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				SPA_FORMAT_AUDIO_format,   SPA_POD_Id(SPA_AUDIO_FORMAT_F32P),
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				SPA_FORMAT_AUDIO_rate,     SPA_POD_CHOICE_RANGE_Int(44100, 1, INT32_MAX),
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				SPA_FORMAT_AUDIO_channels, SPA_POD_Int(1));
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		}
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		break;
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	default:
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			@ -390,10 +389,9 @@ impl_node_port_enum_params(struct spa_node *node,
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				    SPA_PARAM_IO };
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		if (*index < SPA_N_ELEMENTS(list))
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			param = spa_pod_builder_object(&b,
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			param = spa_pod_builder_add_object(&b,
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					SPA_TYPE_OBJECT_ParamList, id,
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					SPA_PARAM_LIST_id, &SPA_POD_Id(list[*index]),
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					0);
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					SPA_PARAM_LIST_id, SPA_POD_Id(list[*index]));
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		else
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			return 0;
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		break;
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			@ -418,17 +416,16 @@ impl_node_port_enum_params(struct spa_node *node,
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		if (*index > 0)
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			return 0;
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		param = spa_pod_builder_object(&b,
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		param = spa_pod_builder_add_object(&b,
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			SPA_TYPE_OBJECT_ParamBuffers, id,
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			SPA_PARAM_BUFFERS_buffers, &SPA_POD_CHOICE_RANGE_Int(1, 1, MAX_BUFFERS),
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			SPA_PARAM_BUFFERS_blocks,  &SPA_POD_Int(1),
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			SPA_PARAM_BUFFERS_size,    &SPA_POD_CHOICE_RANGE_Int(
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							1024 * this->stride,
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							16 * this->stride,
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							INT32_MAX / this->stride),
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			SPA_PARAM_BUFFERS_stride,  &SPA_POD_Int(this->stride),
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			SPA_PARAM_BUFFERS_align,   &SPA_POD_Int(16),
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			0);
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			SPA_PARAM_BUFFERS_buffers, SPA_POD_CHOICE_RANGE_Int(1, 1, MAX_BUFFERS),
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			SPA_PARAM_BUFFERS_blocks,  SPA_POD_Int(1),
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			SPA_PARAM_BUFFERS_size,    SPA_POD_CHOICE_RANGE_Int(
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								1024 * this->stride,
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								16 * this->stride,
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								INT32_MAX / this->stride),
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			SPA_PARAM_BUFFERS_stride,  SPA_POD_Int(this->stride),
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			SPA_PARAM_BUFFERS_align,   SPA_POD_Int(16));
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		break;
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	case SPA_PARAM_Meta:
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			@ -437,11 +434,10 @@ impl_node_port_enum_params(struct spa_node *node,
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		switch (*index) {
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		case 0:
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			param = spa_pod_builder_object(&b,
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			param = spa_pod_builder_add_object(&b,
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				SPA_TYPE_OBJECT_ParamMeta, id,
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				SPA_PARAM_META_type, &SPA_POD_Id(SPA_META_Header),
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				SPA_PARAM_META_size, &SPA_POD_Int(sizeof(struct spa_meta_header)),
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				0);
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				SPA_PARAM_META_type, SPA_POD_Id(SPA_META_Header),
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				SPA_PARAM_META_size, SPA_POD_Int(sizeof(struct spa_meta_header)));
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			break;
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		default:
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			return 0;
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			@ -451,25 +447,22 @@ impl_node_port_enum_params(struct spa_node *node,
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	case SPA_PARAM_IO:
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		switch (*index) {
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		case 0:
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			param = spa_pod_builder_object(&b,
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			param = spa_pod_builder_add_object(&b,
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				SPA_TYPE_OBJECT_ParamIO, id,
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				SPA_PARAM_IO_id,   &SPA_POD_Id(SPA_IO_Buffers),
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				SPA_PARAM_IO_size, &SPA_POD_Int(sizeof(struct spa_io_buffers)),
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				0);
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				SPA_PARAM_IO_id,   SPA_POD_Id(SPA_IO_Buffers),
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				SPA_PARAM_IO_size, SPA_POD_Int(sizeof(struct spa_io_buffers)));
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			break;
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		case 1:
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			param = spa_pod_builder_object(&b,
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			param = spa_pod_builder_add_object(&b,
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				SPA_TYPE_OBJECT_ParamIO, id,
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				SPA_PARAM_IO_id,   &SPA_POD_Id(SPA_IO_Range),
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				SPA_PARAM_IO_size, &SPA_POD_Int(sizeof(struct spa_io_range)),
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				0);
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				SPA_PARAM_IO_id,   SPA_POD_Id(SPA_IO_Range),
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				SPA_PARAM_IO_size, SPA_POD_Int(sizeof(struct spa_io_range)));
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			break;
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		case 2:
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			param = spa_pod_builder_object(&b,
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			param = spa_pod_builder_add_object(&b,
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				SPA_TYPE_OBJECT_ParamIO, id,
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				SPA_PARAM_IO_id,   &SPA_POD_Id(SPA_IO_Control),
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				SPA_PARAM_IO_size, &SPA_POD_Int(sizeof(struct spa_io_sequence)),
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				0);
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				SPA_PARAM_IO_id,   SPA_POD_Id(SPA_IO_Control),
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				SPA_PARAM_IO_size, SPA_POD_Int(sizeof(struct spa_io_sequence)));
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			break;
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		default:
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			return 0;
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