device.h

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/* PipeWire
 *
 * 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 PIPEWIRE_DEVICE_H
#define PIPEWIRE_DEVICE_H
 
#ifdef __cplusplus
extern "C" {
#endif
 
#include <spa/utils/defs.h>
#include <spa/utils/hook.h>
 
#include <pipewire/proxy.h>
 
#define PW_TYPE_INTERFACE_Device        PW_TYPE_INFO_INTERFACE_BASE "Device"
 
#define PW_VERSION_DEVICE               3
struct pw_device;
 
struct pw_device_info {
        uint32_t id;                    
#define PW_DEVICE_CHANGE_MASK_PROPS     (1 << 0)
#define PW_DEVICE_CHANGE_MASK_PARAMS    (1 << 1)
#define PW_DEVICE_CHANGE_MASK_ALL       ((1 << 2)-1)
        uint64_t change_mask;           
        struct spa_dict *props;         
        struct spa_param_info *params;  
        uint32_t n_params;              
};
 
struct pw_device_info *
pw_device_info_update(struct pw_device_info *info,
                const struct pw_device_info *update);
struct pw_device_info *
pw_device_info_merge(struct pw_device_info *info,
                const struct pw_device_info *update, bool reset);
void pw_device_info_free(struct pw_device_info *info);
 
#define PW_DEVICE_EVENT_INFO    0
#define PW_DEVICE_EVENT_PARAM   1
#define PW_DEVICE_EVENT_NUM     2
 
struct pw_device_events {
#define PW_VERSION_DEVICE_EVENTS        0
        uint32_t version;
        void (*info) (void *object, const struct pw_device_info *info);
        void (*param) (void *object, int seq,
                      uint32_t id, uint32_t index, uint32_t next,
                      const struct spa_pod *param);
};
 
 
#define PW_DEVICE_METHOD_ADD_LISTENER           0
#define PW_DEVICE_METHOD_SUBSCRIBE_PARAMS       1
#define PW_DEVICE_METHOD_ENUM_PARAMS            2
#define PW_DEVICE_METHOD_SET_PARAM              3
#define PW_DEVICE_METHOD_NUM                    4
 
struct pw_device_methods {
#define PW_VERSION_DEVICE_METHODS       0
        uint32_t version;
 
        int (*add_listener) (void *object,
                        struct spa_hook *listener,
                        const struct pw_device_events *events,
                        void *data);
        int (*subscribe_params) (void *object, uint32_t *ids, uint32_t n_ids);
 
        int (*enum_params) (void *object, int seq, uint32_t id, uint32_t start, uint32_t num,
                            const struct spa_pod *filter);
        int (*set_param) (void *object, uint32_t id, uint32_t flags,
                          const struct spa_pod *param);
};
 
#define pw_device_method(o,method,version,...)                          \
({                                                                      \
        int _res = -ENOTSUP;                                            \
        spa_interface_call_res((struct spa_interface*)o,                \
                        struct pw_device_methods, _res,                 \
                        method, version, ##__VA_ARGS__);                \
        _res;                                                           \
})
 
#define pw_device_add_listener(c,...)           pw_device_method(c,add_listener,0,__VA_ARGS__)
#define pw_device_subscribe_params(c,...)       pw_device_method(c,subscribe_params,0,__VA_ARGS__)
#define pw_device_enum_params(c,...)            pw_device_method(c,enum_params,0,__VA_ARGS__)
#define pw_device_set_param(c,...)              pw_device_method(c,set_param,0,__VA_ARGS__)
 
#ifdef __cplusplus
}  /* extern "C" */
#endif
 
#endif /* PIPEWIRE_DEVICE_H */