From eb43c8896480114b224755e824fae2e2f7485256 Mon Sep 17 00:00:00 2001 From: David Robillard Date: Mon, 21 Nov 2011 01:36:00 +0000 Subject: Move ns to lv2/ns so repository top level can be used as an include dir directly. --- lv2/ns/ext/contexts/contexts.h | 82 ++++++++++++++++++++++++++++++++++++++++++ 1 file changed, 82 insertions(+) create mode 100644 lv2/ns/ext/contexts/contexts.h (limited to 'lv2/ns/ext/contexts/contexts.h') diff --git a/lv2/ns/ext/contexts/contexts.h b/lv2/ns/ext/contexts/contexts.h new file mode 100644 index 0000000..f49b474 --- /dev/null +++ b/lv2/ns/ext/contexts/contexts.h @@ -0,0 +1,82 @@ +/* LV2 Contexts Extension + * Copyright (C) 2007-2009 David Robillard + * + * This header is free software; you can redistribute it and/or modify it + * under the terms of the GNU General Public License as published by the Free + * Software Foundation; either version 2 of the License, or (at your option) + * any later version. + * + * This header is distributed in the hope that it will be useful, but WITHOUT + * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or + * FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License + * for more details. + * + * You should have received a copy of the GNU General Public License along + * with this program; if not, write to the Free Software Foundation, Inc., + * 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA. + */ + +/** @file + * C header for the LV2 Contexts extension + * . + */ + +#ifndef LV2_CONTEXTS_H +#define LV2_CONTEXTS_H + +#include + +#include "lv2/lv2plug.in/ns/lv2core/lv2.h" + +#define LV2_CONTEXTS_URI "http://lv2plug.in/ns/ext/contexts" + +static inline void +lv2_contexts_set_port_valid(void* flags, uint32_t index) { + ((uint8_t*)flags)[index / 8] |= 1 << (index % 8); +} + +static inline void +lv2_contexts_unset_port_valid(void* flags, uint32_t index) { + ((uint8_t*)flags)[index / 8] &= ~(1 << (index % 8)); +} + +static inline int +lv2_contexts_port_is_valid(const void* flags, uint32_t index) { + return (((uint8_t*)flags)[index / 8] & (1 << (index % 8))) != 0; +} + +typedef struct { + + /** The message run function. This is called once to process a set of + * inputs and produce a set of outputs. + * + * Before calling the host MUST set valid_inputs such that the bit + * corresponding to each input port is 1 iff data is present. The plugin + * MUST only inspect bits corresponding to ports in the message thread. + * + * Similarly, before returning the plugin MUST set valid_outputs such that + * the bit corresponding to each output port of the message context is 1 + * iff the value at that port has changed. + * The plugin must return 1 if outputs have been written, 0 otherwise. + */ + uint32_t (*run)(LV2_Handle instance, + const void* valid_inputs, + void* valid_outputs); + +} LV2_Contexts_MessageContext; + +typedef void* LV2_Contexts_Request_Run_Data; + +typedef struct { + + /** Pointer to opaque host data (to be passed to request_run) */ + LV2_Contexts_Request_Run_Data data; + + /** Request the host execute the context with the given URI */ + void (*request_run)(LV2_Contexts_Request_Run_Data host_handle, + uint32_t context_uri); + +} LV2_Contexts_Request_Run_Feature; + +#endif /* LV2_CONTEXTS_H */ + -- cgit v1.2.1