1 /****************************************************************************** 2 * 3 * Copyright 2016 The Android Open Source Project 4 * Copyright 2009-2012 Broadcom Corporation 5 * 6 * Licensed under the Apache License, Version 2.0 (the "License"); 7 * you may not use this file except in compliance with the License. 8 * You may obtain a copy of the License at: 9 * 10 * http://www.apache.org/licenses/LICENSE-2.0 11 * 12 * Unless required by applicable law or agreed to in writing, software 13 * distributed under the License is distributed on an "AS IS" BASIS, 14 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. 15 * See the License for the specific language governing permissions and 16 * limitations under the License. 17 * 18 ******************************************************************************/ 19 20 #ifndef BTIF_A2DP_SOURCE_H 21 #define BTIF_A2DP_SOURCE_H 22 23 #include <stdbool.h> 24 #include <future> 25 26 #include "bta_av_api.h" 27 28 // Initialize the A2DP Source module. 29 // This function should be called by the BTIF state machine prior to using the 30 // module. 31 bool btif_a2dp_source_init(void); 32 33 // Startup the A2DP Source module. 34 // This function should be called by the BTIF state machine after 35 // btif_a2dp_source_init() to prepare to start streaming. 36 bool btif_a2dp_source_startup(void); 37 38 // Start the A2DP Source session. 39 // This function should be called by the BTIF state machine after 40 // btif_a2dp_source_startup() to start the streaming session for |peer_address|. 41 bool btif_a2dp_source_start_session(const RawAddress& peer_address, 42 std::promise<void> peer_ready_promise); 43 44 // Restart the A2DP Source session. 45 // This function should be called by the BTIF state machine after 46 // btif_a2dp_source_startup() to restart the streaming session. 47 // |old_peer_address| is the peer address of the old session. This address 48 // can be empty. 49 // |new_peer_address| is the peer address of the new session. This address 50 // cannot be empty. 51 bool btif_a2dp_source_restart_session(const RawAddress& old_peer_address, 52 const RawAddress& new_peer_address, 53 std::promise<void> peer_ready_promise); 54 55 // End the A2DP Source session. 56 // This function should be called by the BTIF state machine to end the 57 // streaming session for |peer_address|. 58 bool btif_a2dp_source_end_session(const RawAddress& peer_address); 59 60 // Shutdown the A2DP Source module. 61 // This function should be called by the BTIF state machine to stop streaming. 62 void btif_a2dp_source_shutdown(void); 63 64 // Cleanup the A2DP Source module. 65 // This function should be called by the BTIF state machine during graceful 66 // cleanup. 67 void btif_a2dp_source_cleanup(void); 68 69 // Check whether the A2DP Source media task is running. 70 // Returns true if the A2DP Source media task is running, otherwise false. 71 bool btif_a2dp_source_media_task_is_running(void); 72 73 // Check whether the A2DP Source media task is shutting down. 74 // Returns true if the A2DP Source media task is shutting down. 75 bool btif_a2dp_source_media_task_is_shutting_down(void); 76 77 // Return true if the A2DP Source module is streaming. 78 bool btif_a2dp_source_is_streaming(void); 79 80 // Process a request to start the A2DP audio encoding task. 81 void btif_a2dp_source_start_audio_req(void); 82 83 // Process a request to stop the A2DP audio encoding task. 84 void btif_a2dp_source_stop_audio_req(void); 85 86 // Process a request to update the A2DP audio encoder with user preferred 87 // codec configuration. 88 // The peer address is |peer_addr|. 89 // |codec_user_config| contains the preferred codec user configuration. 90 void btif_a2dp_source_encoder_user_config_update_req( 91 const RawAddress& peer_addr, 92 const btav_a2dp_codec_config_t& codec_user_config); 93 94 // Process a request to update the A2DP audio encoding with new audio 95 // configuration feeding parameters stored in |codec_audio_config|. 96 // The fields that are used are: |codec_audio_config.sample_rate|, 97 // |codec_audio_config.bits_per_sample| and |codec_audio_config.channel_mode|. 98 void btif_a2dp_source_feeding_update_req( 99 const btav_a2dp_codec_config_t& codec_audio_config); 100 101 // Process 'idle' request from the BTIF state machine during initialization. 102 void btif_a2dp_source_on_idle(void); 103 104 // Process 'stop' request from the BTIF state machine to stop A2DP streaming. 105 // |p_av_suspend| is the data associated with the request - see 106 // |tBTA_AV_SUSPEND|. 107 void btif_a2dp_source_on_stopped(tBTA_AV_SUSPEND* p_av_suspend); 108 109 // Process 'suspend' request from the BTIF state machine to suspend A2DP 110 // streaming. 111 // |p_av_suspend| is the data associated with the request - see 112 // |tBTA_AV_SUSPEND|. 113 void btif_a2dp_source_on_suspended(tBTA_AV_SUSPEND* p_av_suspend); 114 115 // Enable/disable discarding of transmitted frames. 116 // If |enable| is true, the discarding is enabled, otherwise is disabled. 117 void btif_a2dp_source_set_tx_flush(bool enable); 118 119 // Get the next A2DP buffer to send. 120 // Returns the next A2DP buffer to send if available, otherwise NULL. 121 BT_HDR* btif_a2dp_source_audio_readbuf(void); 122 123 // Dump debug-related information for the A2DP Source module. 124 // |fd| is the file descriptor to use for writing the ASCII formatted 125 // information. 126 void btif_a2dp_source_debug_dump(int fd); 127 128 #endif /* BTIF_A2DP_SOURCE_H */ 129