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device: implement param introspection

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This commit is contained in:
Wim Taymans 2018-11-28 17:34:16 +01:00
parent 4810d91c58
commit 6e66456381
2 changed files with 81 additions and 0 deletions
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73
src/pipewire/device.c
View file

@ -32,6 +32,7 @@
struct resource_data { struct resource_data {
struct spa_hook resource_listener; struct spa_hook resource_listener;
struct pw_device *device;
}; };
struct node_data { struct node_data {
@ -103,6 +104,75 @@ static const struct pw_resource_events resource_events = {
.destroy = device_unbind_func, .destroy = device_unbind_func,
}; };
int pw_device_for_each_param(struct pw_device *device,
uint32_t param_id,
uint32_t index, uint32_t max,
const struct spa_pod *filter,
int (*callback) (void *data,
uint32_t id, uint32_t index, uint32_t next,
struct spa_pod *param),
void *data)
{
int res = 0;
uint32_t idx, count;
uint8_t buf[4096];
struct spa_pod_builder b = { 0 };
struct spa_pod *param;
if (max == 0)
max = UINT32_MAX;
for (count = 0; count < max; count++) {
spa_pod_builder_init(&b, buf, sizeof(buf));
idx = index;
if ((res = spa_device_enum_params(device->implementation,
param_id, &index,
filter, &param, &b)) <= 0)
break;
if ((res = callback(data, param_id, idx, index, param)) != 0)
break;
}
return res;
}
static int reply_param(void *data, uint32_t id, uint32_t index, uint32_t next, struct spa_pod *param)
{
struct pw_resource *resource = data;
pw_device_resource_param(resource, id, index, next, param);
return 0;
}
static void device_enum_params(void *object, uint32_t id, uint32_t start, uint32_t num,
const struct spa_pod *filter)
{
struct pw_resource *resource = object;
struct resource_data *data = pw_resource_get_user_data(resource);
struct pw_device *device = data->device;
pw_device_for_each_param(device, id, start, num, filter, reply_param, resource);
}
static void device_set_param(void *object, uint32_t id, uint32_t flags,
const struct spa_pod *param)
{
struct pw_resource *resource = object;
struct resource_data *data = pw_resource_get_user_data(resource);
struct pw_device *device = data->device;
int res;
if ((res = spa_device_set_param(device->implementation, id, flags, param)) < 0)
pw_core_resource_error(resource->client->core_resource,
resource->id, res, spa_strerror(res));
}
static const struct pw_device_proxy_methods device_methods = {
PW_VERSION_DEVICE_PROXY_METHODS,
.enum_params = device_enum_params,
.set_param = device_set_param
};
static void static void
global_bind(void *_data, struct pw_client *client, uint32_t permissions, global_bind(void *_data, struct pw_client *client, uint32_t permissions,
uint32_t version, uint32_t id) uint32_t version, uint32_t id)
@ -117,8 +187,11 @@ global_bind(void *_data, struct pw_client *client, uint32_t permissions,
goto no_mem; goto no_mem;
data = pw_resource_get_user_data(resource); data = pw_resource_get_user_data(resource);
data->device = this;
pw_resource_add_listener(resource, &data->resource_listener, &resource_events, resource); pw_resource_add_listener(resource, &data->resource_listener, &resource_events, resource);
pw_resource_set_implementation(resource, &device_methods, resource);
pw_log_debug("device %p: bound to %d", this, resource->id); pw_log_debug("device %p: bound to %d", this, resource->id);
spa_list_append(&global->resource_list, &resource->link); spa_list_append(&global->resource_list, &resource->link);

8
src/pipewire/device.h
View file

@ -93,6 +93,14 @@ int pw_device_update_properties(struct pw_device *device, const struct spa_dict
const struct pw_properties *pw_device_get_properties(struct pw_device *device); const struct pw_properties *pw_device_get_properties(struct pw_device *device);
int pw_device_for_each_param(struct pw_device *device,
uint32_t param_id,
uint32_t index, uint32_t max,
const struct spa_pod *filter,
int (*callback) (void *data,
uint32_t id, uint32_t index, uint32_t next,
struct spa_pod *param),
void *data);
#ifdef __cplusplus #ifdef __cplusplus
} }
#endif #endif