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/* Simple Plugin API
*
* Copyright © 2018 Wim Taymans
*
* Permission is hereby granted, free of charge, to any person obtaining a
* copy of this software and associated documentation files (the "Software"),
* to deal in the Software without restriction, including without limitation
* the rights to use, copy, modify, merge, publish, distribute, sublicense,
* and/or sell copies of the Software, and to permit persons to whom the
* Software is furnished to do so, subject to the following conditions:
*
* The above copyright notice and this permission notice (including the next
* paragraph) shall be included in all copies or substantial portions of the
* Software.
*
* THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
* IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
* FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL
* THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
* LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING
* FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER
* DEALINGS IN THE SOFTWARE.
*/
#ifndef SPA_POD_H
#define SPA_POD_H
#ifdef __cplusplus
extern "C" {
#endif
#include <spa/utils/defs.h>
#include <spa/utils/type.h>
/**
* \addtogroup spa_pod
* \{
*/
#define SPA_POD_BODY_SIZE(pod) (((struct spa_pod*)(pod))->size)
#define SPA_POD_TYPE(pod) (((struct spa_pod*)(pod))->type)
#define SPA_POD_SIZE(pod) ((uint64_t)sizeof(struct spa_pod) + SPA_POD_BODY_SIZE(pod))
#define SPA_POD_CONTENTS_SIZE(type,pod) (SPA_POD_SIZE(pod)-sizeof(type))
#define SPA_POD_CONTENTS(type,pod) SPA_PTROFF((pod),sizeof(type),void)
#define SPA_POD_CONTENTS_CONST(type,pod) SPA_PTROFF((pod),sizeof(type),const void)
#define SPA_POD_BODY(pod) SPA_PTROFF((pod),sizeof(struct spa_pod),void)
#define SPA_POD_BODY_CONST(pod) SPA_PTROFF((pod),sizeof(struct spa_pod),const void)
struct spa_pod {
uint32_t size; /* size of the body */
uint32_t type; /* a basic id of enum spa_type */
};
#define SPA_POD_VALUE(type,pod) (((type*)(pod))->value)
struct spa_pod_bool {
struct spa_pod pod;
int32_t value;
int32_t _padding;
};
struct spa_pod_id {
struct spa_pod pod;
uint32_t value;
int32_t _padding;
};
struct spa_pod_int {
struct spa_pod pod;
int32_t value;
int32_t _padding;
};
struct spa_pod_long {
struct spa_pod pod;
int64_t value;
};
struct spa_pod_float {
struct spa_pod pod;
float value;
int32_t _padding;
};
struct spa_pod_double {
struct spa_pod pod;
double value;
};
struct spa_pod_string {
struct spa_pod pod;
/* value here */
};
struct spa_pod_bytes {
struct spa_pod pod;
/* value here */
};
struct spa_pod_rectangle {
struct spa_pod pod;
struct spa_rectangle value;
};
struct spa_pod_fraction {
struct spa_pod pod;
struct spa_fraction value;
};
struct spa_pod_bitmap {
struct spa_pod pod;
/* array of uint8_t follows with the bitmap */
};
#define SPA_POD_ARRAY_CHILD(arr) (&((struct spa_pod_array*)(arr))->body.child)
#define SPA_POD_ARRAY_VALUE_TYPE(arr) (SPA_POD_TYPE(SPA_POD_ARRAY_CHILD(arr)))
#define SPA_POD_ARRAY_VALUE_SIZE(arr) (SPA_POD_BODY_SIZE(SPA_POD_ARRAY_CHILD(arr)))
#define SPA_POD_ARRAY_N_VALUES(arr) (SPA_POD_ARRAY_VALUE_SIZE(arr) ? ((SPA_POD_BODY_SIZE(arr) - sizeof(struct spa_pod_array_body)) / SPA_POD_ARRAY_VALUE_SIZE(arr)) : 0)
#define SPA_POD_ARRAY_VALUES(arr) SPA_POD_CONTENTS(struct spa_pod_array, arr)
struct spa_pod_array_body {
struct spa_pod child;
/* array with elements of child.size follows */
};
struct spa_pod_array {
struct spa_pod pod;
struct spa_pod_array_body body;
};
#define SPA_POD_CHOICE_CHILD(choice) (&((struct spa_pod_choice*)(choice))->body.child)
#define SPA_POD_CHOICE_TYPE(choice) (((struct spa_pod_choice*)(choice))->body.type)
#define SPA_POD_CHOICE_FLAGS(choice) (((struct spa_pod_choice*)(choice))->body.flags)
#define SPA_POD_CHOICE_VALUE_TYPE(choice) (SPA_POD_TYPE(SPA_POD_CHOICE_CHILD(choice)))
#define SPA_POD_CHOICE_VALUE_SIZE(choice) (SPA_POD_BODY_SIZE(SPA_POD_CHOICE_CHILD(choice)))
#define SPA_POD_CHOICE_N_VALUES(choice) (SPA_POD_CHOICE_VALUE_SIZE(choice) ? ((SPA_POD_BODY_SIZE(choice) - sizeof(struct spa_pod_choice_body)) / SPA_POD_CHOICE_VALUE_SIZE(choice)) : 0)
#define SPA_POD_CHOICE_VALUES(choice) (SPA_POD_CONTENTS(struct spa_pod_choice, choice))
enum spa_choice_type {
SPA_CHOICE_None, /**< no choice, first value is current */
SPA_CHOICE_Range, /**< range: default, min, max */
SPA_CHOICE_Step, /**< range with step: default, min, max, step */
SPA_CHOICE_Enum, /**< list: default, alternative,... */
SPA_CHOICE_Flags, /**< flags: default, possible flags,... */
};
struct spa_pod_choice_body {
uint32_t type; /**< type of choice, one of enum spa_choice_type */
uint32_t flags; /**< extra flags */
struct spa_pod child;
/* array with elements of child.size follows. Note that there might be more
* elements than required by \a type, which should be ignored. */
};
struct spa_pod_choice {
struct spa_pod pod;
struct spa_pod_choice_body body;
};
struct spa_pod_struct {
struct spa_pod pod;
/* one or more spa_pod follow */
};
#define SPA_POD_OBJECT_TYPE(obj) (((struct spa_pod_object*)(obj))->body.type)
#define SPA_POD_OBJECT_ID(obj) (((struct spa_pod_object*)(obj))->body.id)
struct spa_pod_object_body {
uint32_t type; /**< one of enum spa_type */
uint32_t id; /**< id of the object, depends on the object type */
/* contents follow, series of spa_pod_prop */
};
struct spa_pod_object {
struct spa_pod pod;
struct spa_pod_object_body body;
};
struct spa_pod_pointer_body {
uint32_t type; /**< pointer id, one of enum spa_type */
uint32_t _padding;
const void *value;
};
struct spa_pod_pointer {
struct spa_pod pod;
struct spa_pod_pointer_body body;
};
struct spa_pod_fd {
struct spa_pod pod;
int64_t value;
};
#define SPA_POD_PROP_SIZE(prop) (sizeof(struct spa_pod_prop) + (prop)->value.size)
/* props can be inside an object */
struct spa_pod_prop {
uint32_t key; /**< key of property, list of valid keys depends on the
* object type */
#define SPA_POD_PROP_FLAG_READONLY (1u<<0) /**< is read-only */
#define SPA_POD_PROP_FLAG_HARDWARE (1u<<1) /**< some sort of hardware parameter */
#define SPA_POD_PROP_FLAG_HINT_DICT (1u<<2) /**< contains a dictionary struct as
* (Struct(
* Int : n_items,
* (String : key,
* String : value)*)) */
#define SPA_POD_PROP_FLAG_MANDATORY (1u<<3) /**< is mandatory */
#define SPA_POD_PROP_FLAG_DONT_FIXATE (1u<<4) /**< choices need no fixation */
uint32_t flags; /**< flags for property */
struct spa_pod value;
/* value follows */
};
#define SPA_POD_CONTROL_SIZE(ev) (sizeof(struct spa_pod_control) + (ev)->value.size)
/* controls can be inside a sequence and mark timed values */
struct spa_pod_control {
uint32_t offset; /**< media offset */
uint32_t type; /**< type of control, enum spa_control_type */
struct spa_pod value; /**< control value, depends on type */
/* value contents follow */
};
struct spa_pod_sequence_body {
uint32_t unit;
uint32_t pad;
/* series of struct spa_pod_control follows */
};
/** a sequence of timed controls */
struct spa_pod_sequence {
struct spa_pod pod;
struct spa_pod_sequence_body body;
};
/**
* \}
*/
#ifdef __cplusplus
} /* extern "C" */
#endif
#endif /* SPA_POD_H */
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