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+/* LV2 OSC Messages Extension
+ * Copyright (C) 2007-2009 David Robillard <http://drobilla.net>
+ *
+ * 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.
+ */
+
+#ifndef LV2_OSC_H
+#define LV2_OSC_H
+
+#include <stdint.h>
+
+#ifdef __cplusplus
+extern "C" {
+#endif
+
+/** @file
+ * C header for the LV2 OSC extension <http://lv2plug.in/ns/ext/osc>.
+ * This extension defines a format for (raw) OSC messages/events.
+ */
+
+
+/** Argument (in a message).
+ *
+ * The name of the element in this union directly corresponds to the OSC
+ * type tag character in LV2_Event::types.
+ */
+typedef union {
+ /* Standard OSC types */
+ int32_t i; /**< 32 bit signed integer */
+ float f; /**< 32 bit IEEE-754 floating point number ("float") */
+ char s; /**< Standard C, NULL terminated string */
+ uint8_t b; /**< Blob (int32 size then size bytes padded to 32 bits) */
+
+ /* "Nonstandard" OSC types (defined in the OSC standard) */
+ int64_t h; /* 64 bit signed integer */
+ // t /* OSC-timetag */
+ double d; /* 64 bit IEEE 754 floating point number ("double") */
+ // S /* Symbol, represented as an OSC-string */
+ int32_t c; /* Character, represented as a 32-bit integer */
+ // r /* 32 bit RGBA color */
+ // m /* 4 byte MIDI message. Bytes from MSB to LSB are: port id, status byte, data1, data2 */
+ // T /* True. No bytes are allocated in the argument data. */
+ // F /* False. No bytes are allocated in the argument data. */
+ // N /* Nil. No bytes are allocated in the argument data. */
+ // I /* Infinitum. No bytes are allocated in the argument data. */
+ // [ /* The beginning of an array. */
+ // ] /* The end of an array. */
+} LV2_OSC_Argument;
+
+
+
+/** Message.
+ *
+ * This is an OSC message at heart, but with some additional cache information
+ * to allow fast access to parameters. This is the payload of an LV2_Event,
+ * time stamp and size (being generic) are in the containing header.
+ */
+typedef struct {
+ uint32_t data_size; /**< Total size of data, in bytes */
+ uint32_t argument_count; /**< Number of arguments in data */
+ uint32_t types_offset; /**< Offset of types string in data */
+
+ /** Take the address of this member to get a pointer to the remaining data.
+ *
+ * Contents are an argument index:
+ * uint32_t argument_index[argument_count]
+ *
+ * followed by a standard OSC message:
+ * char path[path_length] (padded OSC string)
+ * char types[argument_count] (padded OSC string)
+ * void data[data_size]
+ */
+ char data;
+
+} LV2_OSC_Event;
+
+LV2_OSC_Event* lv2_osc_event_new(const char* path, const char* types, ...);
+
+LV2_OSC_Event* lv2_osc_event_from_raw(uint32_t out_buf_size, void* out_buf,
+ uint32_t raw_msg_size, void* raw_msg);
+
+static inline uint32_t lv2_osc_get_osc_message_size(const LV2_OSC_Event* msg)
+ { return (msg->argument_count * sizeof(char) + 1) + msg->data_size; }
+
+static inline const void* lv2_osc_get_osc_message(const LV2_OSC_Event* msg)
+ { return (const void*)(&msg->data + (sizeof(uint32_t) * msg->argument_count)); }
+
+static inline const char* lv2_osc_get_path(const LV2_OSC_Event* msg)
+ { return (const char*)(&msg->data + (sizeof(uint32_t) * msg->argument_count)); }
+
+static inline const char* lv2_osc_get_types(const LV2_OSC_Event* msg)
+ { return (const char*)(&msg->data + msg->types_offset); }
+
+static inline LV2_OSC_Argument* lv2_osc_get_argument(const LV2_OSC_Event* msg, uint32_t i)
+ { return (LV2_OSC_Argument*)(&msg->data + ((uint32_t*)&msg->data)[i]); }
+
+/*
+int lv2_osc_buffer_append_message(LV2_Event_Buffer* buf, LV2_Event* msg);
+int lv2_osc_buffer_append(LV2_Event_Buffer* buf, double time, const char* path, const char* types, ...);
+void lv2_osc_buffer_compact(LV2_Event_Buffer* buf);
+*/
+
+#ifdef __cplusplus
+}
+#endif
+
+#endif /* LV2_OSC_H */