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utils.h
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/* Simple Plugin API */
/* SPDX-FileCopyrightText: Copyright © 2019 Wim Taymans */
/* SPDX-License-Identifier: MIT */
#ifndef SPA_DEVICE_UTILS_H
#define SPA_DEVICE_UTILS_H
#include <spa/pod/builder.h>
#include <spa/monitor/device.h>
#ifdef __cplusplus
extern "C" {
#endif
#ifndef SPA_API_DEVICE_UTILS
#ifdef SPA_API_IMPL
#define SPA_API_DEVICE_UTILS SPA_API_IMPL
#else
#define SPA_API_DEVICE_UTILS static inline
#endif
#endif
struct spa_result_device_params_data {
struct spa_pod_builder *builder;
struct spa_result_device_params data;
};
SPA_API_DEVICE_UTILS void spa_result_func_device_params(void *data, int seq SPA_UNUSED, int res SPA_UNUSED,
uint32_t type SPA_UNUSED, const void *result)
{
struct spa_result_device_params_data *d =
(struct spa_result_device_params_data *)data;
const struct spa_result_device_params *r =
(const struct spa_result_device_params *)result;
uint32_t offset = d->builder->state.offset;
if (spa_pod_builder_raw_padded(d->builder, r->param, SPA_POD_SIZE(r->param)) < 0)
return;
d->data.next = r->next;
d->data.param = spa_pod_builder_deref(d->builder, offset);
}
SPA_API_DEVICE_UTILS int spa_device_enum_params_sync(struct spa_device *device,
uint32_t id, uint32_t *index,
const struct spa_pod *filter,
struct spa_pod **param,
struct spa_pod_builder *builder)
{
struct spa_result_device_params_data data = { builder, {0}};
struct spa_hook listener = {{0}, {0}, 0, 0};
static const struct spa_device_events device_events = {
.version = SPA_VERSION_DEVICE_EVENTS,
.info = NULL,
.result = spa_result_func_device_params,
};
int res;
spa_device_add_listener(device, &listener, &device_events, &data);
res = spa_device_enum_params(device, 0, id, *index, 1, filter);
spa_hook_remove(&listener);
if (data.data.param == NULL) {
if (res > 0)
res = 0;
} else {
*index = data.data.next;
*param = data.data.param;
res = 1;
}
return res;
}
#define spa_device_emit(hooks,method,version,...) \
spa_hook_list_call_simple(hooks, struct spa_device_events, \
method, version, ##__VA_ARGS__)
#define spa_device_emit_info(hooks,i) spa_device_emit(hooks,info, 0, i)
#define spa_device_emit_result(hooks,s,r,t,res) spa_device_emit(hooks,result, 0, s, r, t, res)
#define spa_device_emit_event(hooks,e) spa_device_emit(hooks,event, 0, e)
#define spa_device_emit_object_info(hooks,id,i) spa_device_emit(hooks,object_info, 0, id, i)
#ifdef __cplusplus
} /* extern "C" */
#endif
#endif /* SPA_DEVICE_UTILS_H */
builder.h
spa/pod/builder.h
seq
uint32_t int seq
Definition core.h:432
r
uint32_t int int const char int r
Definition core.h:447
res
uint32_t int int res
Definition core.h:433
spa_device_enum_params
SPA_API_DEVICE int spa_device_enum_params(struct spa_device *object, int seq, uint32_t id, uint32_t index, uint32_t max, const struct spa_pod *filter)
Definition device.h:276
SPA_VERSION_DEVICE_EVENTS
#define SPA_VERSION_DEVICE_EVENTS
version of the structure
Definition device.h:132
spa_device_add_listener
SPA_API_DEVICE int spa_device_add_listener(struct spa_device *object, struct spa_hook *listener, const struct spa_device_events *events, void *data)
Definition device.h:262
spa_result_func_device_params
SPA_API_DEVICE_UTILS void spa_result_func_device_params(void *data, int seq, int res 1, uint32_t type, const void *result)
Definition utils.h:40
spa_device_enum_params_sync
SPA_API_DEVICE_UTILS int spa_device_enum_params_sync(struct spa_device *device, uint32_t id, uint32_t *index, const struct spa_pod *filter, struct spa_pod **param, struct spa_pod_builder *builder)
Definition utils.h:54
spa_hook_remove
SPA_API_HOOK void spa_hook_remove(struct spa_hook *hook)
Remove a hook.
Definition hook.h:468
spa_pod_builder_deref
SPA_API_POD_BUILDER struct spa_pod * spa_pod_builder_deref(struct spa_pod_builder *builder, uint32_t offset)
Definition builder.h:121
spa_pod_builder_raw_padded
SPA_API_POD_BUILDER int spa_pod_builder_raw_padded(struct spa_pod_builder *builder, const void *data, uint32_t size)
Definition builder.h:205
SPA_POD_SIZE
#define SPA_POD_SIZE(pod)
Definition pod.h:35
SPA_UNUSED
#define SPA_UNUSED
Definition defs.h:309
device.h
spa/monitor/device.h
SPA_API_DEVICE_UTILS
#define SPA_API_DEVICE_UTILS
Definition utils.h:26
spa_device_events
spa_device_events:
Definition device.h:129
spa_device
Definition device.h:50
spa_hook
A hook, contains the structure with functions and the data passed to the functions.
Definition hook.h:427
spa_pod_builder_state::offset
uint32_t offset
Definition builder.h:43
spa_pod_builder
Definition builder.h:63
spa_pod_builder::state
struct spa_pod_builder_state state
Definition builder.h:67
spa_pod
Definition pod.h:57
spa_result_device_params_data
Definition utils.h:35
spa_result_device_params_data::data
struct spa_result_device_params data
Definition utils.h:37
spa_result_device_params_data::builder
struct spa_pod_builder * builder
Definition utils.h:36
spa_result_device_params
Definition device.h:106
spa_result_device_params::index
uint32_t index
Definition device.h:108
spa_result_device_params::next
uint32_t next
Definition device.h:109
spa_result_device_params::param
struct spa_pod * param
Definition device.h:110