mirror of
https://gitlab.freedesktop.org/pipewire/pipewire.git
synced 2025-11-02 09:01:50 -05:00
f9d8bdb9b8
Check if we actually managed to add the param to the builder before we try to deref it. Use a safer deref that checks the sizes of the pod and builder.
97 lines
3.3 KiB
C
97 lines
3.3 KiB
C
/* Simple Plugin API
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*
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* Copyright © 2019 Wim Taymans
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*
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* Permission is hereby granted, free of charge, to any person obtaining a
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* copy of this software and associated documentation files (the "Software"),
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* to deal in the Software without restriction, including without limitation
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* the rights to use, copy, modify, merge, publish, distribute, sublicense,
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* and/or sell copies of the Software, and to permit persons to whom the
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* Software is furnished to do so, subject to the following conditions:
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*
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* The above copyright notice and this permission notice (including the next
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* paragraph) shall be included in all copies or substantial portions of the
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* Software.
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*
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* THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
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* IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
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* FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL
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* THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
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* LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING
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* FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER
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* DEALINGS IN THE SOFTWARE.
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*/
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#ifndef SPA_DEVICE_UTILS_H
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#define SPA_DEVICE_UTILS_H
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#ifdef __cplusplus
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extern "C" {
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#endif
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#include <spa/pod/builder.h>
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#include <spa/monitor/device.h>
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struct spa_result_device_params_data {
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struct spa_pod_builder *builder;
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struct spa_result_device_params data;
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};
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static inline void spa_result_func_device_params(void *data, int seq, int res,
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uint32_t type, const void *result)
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{
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struct spa_result_device_params_data *d =
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(struct spa_result_device_params_data *)data;
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const struct spa_result_device_params *r =
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(const struct spa_result_device_params *)result;
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uint32_t offset = d->builder->state.offset;
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if (spa_pod_builder_raw_padded(d->builder, r->param, SPA_POD_SIZE(r->param)) < 0)
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return;
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d->data.next = r->next;
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d->data.param = spa_pod_builder_deref(d->builder, offset);
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}
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static inline int spa_device_enum_params_sync(struct spa_device *device,
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uint32_t id, uint32_t *index,
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const struct spa_pod *filter,
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struct spa_pod **param,
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struct spa_pod_builder *builder)
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{
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struct spa_result_device_params_data data = { builder, };
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struct spa_hook listener = {{0}};
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static const struct spa_device_events device_events = {
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.version = SPA_VERSION_DEVICE_EVENTS,
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.info = NULL,
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.result = spa_result_func_device_params,
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};
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int res;
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spa_device_add_listener(device, &listener, &device_events, &data);
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res = spa_device_enum_params(device, 0, id, *index, 1, filter);
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spa_hook_remove(&listener);
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if (data.data.param == NULL) {
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if (res > 0)
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res = 0;
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} else {
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*index = data.data.next;
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*param = data.data.param;
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res = 1;
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}
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return res;
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}
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#define spa_device_emit(hooks,method,version,...) \
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spa_hook_list_call_simple(hooks, struct spa_device_events, \
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method, version, ##__VA_ARGS__)
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#define spa_device_emit_info(hooks,i) spa_device_emit(hooks,info, 0, i)
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#define spa_device_emit_result(hooks,s,r,t,res) spa_device_emit(hooks,result, 0, s, r, t, res)
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#define spa_device_emit_event(hooks,e) spa_device_emit(hooks,event, 0, e)
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#define spa_device_emit_object_info(hooks,id,i) spa_device_emit(hooks,object_info, 0, id, i)
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#ifdef __cplusplus
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} /* extern "C" */
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#endif
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#endif /* SPA_DEVICE_UTILS_H */
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