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