1 /****************************************************************************** 2 * 3 * Copyright (C) 2016 The Android Open Source Project 4 * Copyright (C) 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_SINK_H 21 #define BTIF_A2DP_SINK_H 22 23 #include <inttypes.h> 24 #include <stdbool.h> 25 26 #include "bt_types.h" 27 #include "bta_av_api.h" 28 29 // 30 // Audio focus state for audio track. 31 // 32 // NOTE: The values must be same as: 33 // - A2dpSinkStreamingStateMachine.STATE_FOCUS_LOST = 0 34 // - A2dpSinkStreamingStateMachine.STATE_FOCUS_GRANTED = 1 35 // 36 typedef enum { 37 BTIF_A2DP_SINK_FOCUS_NOT_GRANTED = 0, 38 BTIF_A2DP_SINK_FOCUS_GRANTED = 1 39 } btif_a2dp_sink_focus_state_t; 40 41 // Initialize and startup the A2DP Sink module. 42 // This function should be called by the BTIF state machine prior to using the 43 // module. 44 bool btif_a2dp_sink_startup(void); 45 46 // Shutdown and cleanup the A2DP Sink module. 47 // This function should be called by the BTIF state machine during 48 // graceful shutdown and cleanup. 49 void btif_a2dp_sink_shutdown(void); 50 51 // Get the audio sample rate for the A2DP Sink module. 52 tA2DP_SAMPLE_RATE btif_a2dp_sink_get_sample_rate(void); 53 54 // Get the audio channel count for the A2DP Sink module. 55 tA2DP_CHANNEL_COUNT btif_a2dp_sink_get_channel_count(void); 56 57 // Update the decoder for the A2DP Sink module. 58 // |p_codec_info| contains the new codec information. 59 void btif_a2dp_sink_update_decoder(const uint8_t* p_codec_info); 60 61 // Process 'idle' request from the BTIF state machine during initialization. 62 void btif_a2dp_sink_on_idle(void); 63 64 // Process 'stop' request from the BTIF state machine to stop A2DP streaming. 65 // |p_av_suspend| is the data associated with the request - see 66 // |tBTA_AV_SUSPEND|. 67 void btif_a2dp_sink_on_stopped(tBTA_AV_SUSPEND* p_av_suspend); 68 69 // Process 'suspend' request from the BTIF state machine to suspend A2DP 70 // streaming. 71 // |p_av_suspend| is the data associated with the request - see 72 // |tBTA_AV_SUSPEND|. 73 void btif_a2dp_sink_on_suspended(tBTA_AV_SUSPEND* p_av_suspend); 74 75 // Enable/disable discarding of received A2DP frames. 76 // If |enable| is true, the discarding is enabled, otherwise is disabled. 77 void btif_a2dp_sink_set_rx_flush(bool enable); 78 79 // Enqueue a buffer to the A2DP Sink queue. If the queue has reached its 80 // maximum size |MAX_INPUT_A2DP_FRAME_QUEUE_SZ|, the oldest buffer is 81 // removed from the queue. 82 // |p_buf| is the buffer to enqueue. 83 // Returns the number of buffers in the Sink queue after the enqueing. 84 uint8_t btif_a2dp_sink_enqueue_buf(BT_HDR* p_buf); 85 86 // Dump debug-related information for the A2DP Sink module. 87 // |fd| is the file descriptor to use for writing the ASCII formatted 88 // information. 89 void btif_a2dp_sink_debug_dump(int fd); 90 91 // Update the A2DP Sink related metrics. 92 // This function should be called before collecting the metrics. 93 void btif_a2dp_sink_update_metrics(void); 94 95 // Create a request to set the audio focus state for the audio track. 96 // |state| is the new state value - see |btif_a2dp_sink_focus_state_t| 97 // for valid values. 98 void btif_a2dp_sink_set_focus_state_req(btif_a2dp_sink_focus_state_t state); 99 100 // Set the audio track gain for the audio track. 101 // |gain| is the audio track gain value to use. 102 void btif_a2dp_sink_set_audio_track_gain(float gain); 103 104 #endif /* BTIF_A2DP_SINK_H */ 105
