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Diffstat (limited to '')
| -rw-r--r-- | src/modules/spa/spa-device.c | 161 |
1 files changed, 161 insertions, 0 deletions
diff --git a/src/modules/spa/spa-device.c b/src/modules/spa/spa-device.c new file mode 100644 index 0000000..936793b --- /dev/null +++ b/src/modules/spa/spa-device.c @@ -0,0 +1,161 @@ +/* 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. + */ + +#include "config.h" + +#include <string.h> +#include <stdio.h> +#include <dlfcn.h> + +#include <spa/utils/result.h> +#include <spa/param/props.h> +#include <spa/pod/iter.h> +#include <spa/debug/types.h> + +#include "spa-device.h" + +struct impl { + struct pw_impl_device *this; + + enum pw_spa_device_flags flags; + + void *unload; + struct spa_handle *handle; + struct spa_device *device; + + struct spa_hook device_listener; + + void *user_data; +}; + +static void device_free(void *data) +{ + struct impl *impl = data; + struct pw_impl_device *device = impl->this; + + pw_log_debug("spa-device %p: free", device); + + spa_hook_remove(&impl->device_listener); + if (impl->handle) + pw_unload_spa_handle(impl->handle); +} + +static const struct pw_impl_device_events device_events = { + PW_VERSION_IMPL_DEVICE_EVENTS, + .free = device_free, +}; + +struct pw_impl_device * +pw_spa_device_new(struct pw_context *context, + enum pw_spa_device_flags flags, + struct spa_device *device, + struct spa_handle *handle, + struct pw_properties *properties, + size_t user_data_size) +{ + struct pw_impl_device *this; + struct impl *impl; + int res; + + this = pw_context_create_device(context, properties, sizeof(struct impl) + user_data_size); + if (this == NULL) + return NULL; + + impl = pw_impl_device_get_user_data(this); + impl->this = this; + impl->device = device; + impl->handle = handle; + impl->flags = flags; + + if (user_data_size > 0) + impl->user_data = SPA_PTROFF(impl, sizeof(struct impl), void); + + pw_impl_device_add_listener(this, &impl->device_listener, &device_events, impl); + pw_impl_device_set_implementation(this, impl->device); + + if (!SPA_FLAG_IS_SET(impl->flags, PW_SPA_DEVICE_FLAG_NO_REGISTER)) { + if ((res = pw_impl_device_register(this, NULL)) < 0) + goto error_register; + } + return this; + +error_register: + pw_impl_device_destroy(this); + errno = -res; + return NULL; +} + +void *pw_spa_device_get_user_data(struct pw_impl_device *device) +{ + struct impl *impl = pw_impl_device_get_user_data(device); + return impl->user_data; +} + +struct pw_impl_device *pw_spa_device_load(struct pw_context *context, + const char *factory_name, + enum pw_spa_device_flags flags, + struct pw_properties *properties, + size_t user_data_size) +{ + struct pw_impl_device *this; + struct spa_handle *handle; + void *iface; + int res; + + handle = pw_context_load_spa_handle(context, factory_name, + properties ? &properties->dict : NULL); + if (handle == NULL) + goto error_load; + + if ((res = spa_handle_get_interface(handle, SPA_TYPE_INTERFACE_Device, &iface)) < 0) + goto error_interface; + + this = pw_spa_device_new(context, flags, + iface, handle, properties, user_data_size); + if (this == NULL) + goto error_device; + + return this; + +error_load: + res = -errno; + pw_log_debug("can't load device handle %s: %m", factory_name); + goto error_exit; +error_interface: + pw_log_debug("can't get device interface %s: %s", factory_name, + spa_strerror(res)); + goto error_exit_unload; +error_device: + properties = NULL; + res = -errno; + pw_log_debug("can't create device %s: %m", factory_name); + goto error_exit_unload; + +error_exit_unload: + pw_unload_spa_handle(handle); +error_exit: + errno = -res; + pw_properties_free(properties); + return NULL; +} |