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 <cstdint> 24 #include <future> 25 #include <vector> 26 27 #include "bta/include/bta_av_api.h" 28 #include "include/hardware/bt_av.h" 29 #include "types/raw_address.h" 30 31 // Initialize the A2DP Source module. 32 // This function should be called by the BTIF state machine prior to using the 33 // module. 34 bool btif_a2dp_source_init(void); 35 36 // Startup the A2DP Source module. 37 // This function should be called by the BTIF state machine after 38 // btif_a2dp_source_init() to prepare to start streaming. 39 bool btif_a2dp_source_startup(void); 40 41 // Start the A2DP Source session. 42 // This function should be called by the BTIF state machine after 43 // btif_a2dp_source_startup() to start the streaming session for |peer_address|. 44 bool btif_a2dp_source_start_session(const RawAddress& peer_address, 45 std::promise<void> peer_ready_promise); 46 47 // Restart the A2DP Source session. 48 // This function should be called by the BTIF state machine after 49 // btif_a2dp_source_startup() to restart the streaming session. 50 // |old_peer_address| is the peer address of the old session. This address 51 // can be empty. 52 // |new_peer_address| is the peer address of the new session. This address 53 // cannot be empty. 54 bool btif_a2dp_source_restart_session(const RawAddress& old_peer_address, 55 const RawAddress& new_peer_address, 56 std::promise<void> peer_ready_promise); 57 58 // End the A2DP Source session. 59 // This function should be called by the BTIF state machine to end the 60 // streaming session for |peer_address|. 61 bool btif_a2dp_source_end_session(const RawAddress& peer_address); 62 63 // Shutdown the A2DP Source module. 64 // This function should be called by the BTIF state machine to stop streaming. 65 void btif_a2dp_source_shutdown(void); 66 67 // Cleanup the A2DP Source module. 68 // This function should be called by the BTIF state machine during graceful 69 // cleanup. 70 void btif_a2dp_source_cleanup(void); 71 72 // Check whether the A2DP Source media task is running. 73 // Returns true if the A2DP Source media task is running, otherwise false. 74 bool btif_a2dp_source_media_task_is_running(void); 75 76 // Check whether the A2DP Source media task is shutting down. 77 // Returns true if the A2DP Source media task is shutting down. 78 bool btif_a2dp_source_media_task_is_shutting_down(void); 79 80 // Return true if the A2DP Source module is streaming. 81 bool btif_a2dp_source_is_streaming(void); 82 83 // Process a request to start the A2DP audio encoding task. 84 void btif_a2dp_source_start_audio_req(void); 85 86 // Process a request to stop the A2DP audio encoding task. 87 void btif_a2dp_source_stop_audio_req(void); 88 89 // Process a request to update the A2DP audio encoder with user preferred 90 // codec configuration. 91 // The peer address is |peer_addr|. 92 // |codec_user_config| contains the preferred codec user configuration. 93 void btif_a2dp_source_encoder_user_config_update_req( 94 const RawAddress& peer_addr, 95 const std::vector<btav_a2dp_codec_config_t>& codec_user_preferences, 96 std::promise<void> peer_ready_promise); 97 98 // Process a request to update the A2DP audio encoding with new audio 99 // configuration feeding parameters stored in |codec_audio_config|. 100 // The fields that are used are: |codec_audio_config.sample_rate|, 101 // |codec_audio_config.bits_per_sample| and |codec_audio_config.channel_mode|. 102 void btif_a2dp_source_feeding_update_req( 103 const btav_a2dp_codec_config_t& codec_audio_config); 104 105 // Process 'idle' request from the BTIF state machine during initialization. 106 void btif_a2dp_source_on_idle(void); 107 108 // Process 'stop' request from the BTIF state machine to stop A2DP streaming. 109 // |p_av_suspend| is the data associated with the request - see 110 // |tBTA_AV_SUSPEND|. 111 void btif_a2dp_source_on_stopped(tBTA_AV_SUSPEND* p_av_suspend); 112 113 // Process 'suspend' request from the BTIF state machine to suspend A2DP 114 // streaming. 115 // |p_av_suspend| is the data associated with the request - see 116 // |tBTA_AV_SUSPEND|. 117 void btif_a2dp_source_on_suspended(tBTA_AV_SUSPEND* p_av_suspend); 118 119 // Enable/disable discarding of transmitted frames. 120 // If |enable| is true, the discarding is enabled, otherwise is disabled. 121 void btif_a2dp_source_set_tx_flush(bool enable); 122 123 // Get the next A2DP buffer to send. 124 // Returns the next A2DP buffer to send if available, otherwise NULL. 125 BT_HDR* btif_a2dp_source_audio_readbuf(void); 126 127 // Dump debug-related information for the A2DP Source module. 128 // |fd| is the file descriptor to use for writing the ASCII formatted 129 // information. 130 void btif_a2dp_source_debug_dump(int fd); 131 132 // Set the dynamic audio buffer size 133 void btif_a2dp_source_set_dynamic_audio_buffer_size( 134 uint8_t dynamic_audio_buffer_size); 135 136 #endif /* BTIF_A2DP_SOURCE_H */ 137