1 /* Copyright 2017 The Chromium OS Authors. All rights reserved. 2 * Use of this source code is governed by a BSD-style license that can be 3 * found in the LICENSE file. 4 */ 5 6 #include <stdint.h> 7 #include <string.h> 8 #include <syslog.h> 9 10 #include "cras_main_message.h" 11 #include "cras_observer.h" 12 #include "cras_system_state.h" 13 14 struct non_empty_audio_msg { 15 struct cras_main_message header; 16 int32_t non_empty; 17 }; 18 19 /* The following functions are called from audio thread. */ 20 21 static void init_non_empty_audio_msg(struct non_empty_audio_msg *msg) 22 { 23 memset(msg, 0, sizeof(*msg)); 24 msg->header.type = CRAS_MAIN_NON_EMPTY_AUDIO_STATE; 25 msg->header.length = sizeof(*msg); 26 } 27 28 int cras_non_empty_audio_send_msg(int32_t non_empty) 29 { 30 struct non_empty_audio_msg msg; 31 int rc; 32 33 init_non_empty_audio_msg(&msg); 34 msg.non_empty = non_empty; 35 36 rc = cras_main_message_send((struct cras_main_message *)&msg); 37 if (rc < 0) 38 syslog(LOG_ERR, "Failed to send non-empty audio message!"); 39 40 return rc; 41 } 42 43 /* The following functions are called from main thread. */ 44 45 static void handle_non_empty_audio_message(struct cras_main_message *msg, 46 void *arg) 47 { 48 struct non_empty_audio_msg *audio_msg = 49 (struct non_empty_audio_msg *)msg; 50 51 cras_system_state_set_non_empty_status(audio_msg->non_empty); 52 cras_observer_notify_non_empty_audio_state_changed(audio_msg->non_empty); 53 } 54 55 int cras_non_empty_audio_handler_init() 56 { 57 cras_main_message_add_handler(CRAS_MAIN_NON_EMPTY_AUDIO_STATE, 58 handle_non_empty_audio_message, NULL); 59 return 0; 60 }
