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141 lines
5.4 KiB
141 lines
5.4 KiB
/******************************************************************************
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*
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* Copyright 2016 The Android Open Source Project
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* Copyright 2009-2012 Broadcom Corporation
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*
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* Licensed under the Apache License, Version 2.0 (the "License");
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* you may not use this file except in compliance with the License.
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* You may obtain a copy of the License at:
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*
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* http://www.apache.org/licenses/LICENSE-2.0
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*
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* Unless required by applicable law or agreed to in writing, software
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* distributed under the License is distributed on an "AS IS" BASIS,
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* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
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* See the License for the specific language governing permissions and
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* limitations under the License.
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*
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******************************************************************************/
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#ifndef BTIF_A2DP_SINK_H
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#define BTIF_A2DP_SINK_H
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#include <cstdint>
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#include <future>
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#include "audio_a2dp_hw/include/audio_a2dp_hw.h"
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#include "bta/include/bta_av_api.h"
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#include "types/raw_address.h"
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//
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// Audio focus state for audio track.
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//
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// NOTE: The values must be same as:
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// - A2dpSinkStreamingStateMachine.STATE_FOCUS_LOST = 0
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// - A2dpSinkStreamingStateMachine.STATE_FOCUS_GRANTED = 1
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//
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typedef enum {
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BTIF_A2DP_SINK_FOCUS_NOT_GRANTED = 0,
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BTIF_A2DP_SINK_FOCUS_GRANTED = 1
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} btif_a2dp_sink_focus_state_t;
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// Initialize the A2DP Sink module.
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// This function should be called by the BTIF state machine prior to using the
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// module.
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bool btif_a2dp_sink_init(void);
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// Startup the A2DP Sink module.
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// This function should be called by the BTIF state machine after
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// btif_a2dp_sink_init() to prepare for receiving and processing audio
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// streaming.
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bool btif_a2dp_sink_startup(void);
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// Start the A2DP Sink session.
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// This function should be called by the BTIF state machine after
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// btif_a2dp_sink_startup() to start the streaming session for |peer_address|.
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bool btif_a2dp_sink_start_session(const RawAddress& peer_address,
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std::promise<void> peer_ready_promise);
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// Restart the A2DP Sink session.
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// This function should be called by the BTIF state machine after
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// btif_a2dp_sink_startup() to restart the streaming session.
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// |old_peer_address| is the peer address of the old session. This address
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// can be empty.
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// |new_peer_address| is the peer address of the new session. This address
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// cannot be empty.
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bool btif_a2dp_sink_restart_session(const RawAddress& old_peer_address,
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const RawAddress& new_peer_address,
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std::promise<void> peer_ready_promise);
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// End the A2DP Sink session.
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// This function should be called by the BTIF state machine to end the
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// streaming session for |peer_address|.
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bool btif_a2dp_sink_end_session(const RawAddress& peer_address);
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// Shutdown the A2DP Sink module.
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// This function should be called by the BTIF state machine before
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// btif_a2dp_sink_cleanup() to shutdown the processing of the audio streaming.
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void btif_a2dp_sink_shutdown(void);
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// Cleanup the A2DP Sink module.
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// This function should be called by the BTIF state machine during graceful
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// cleanup.
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void btif_a2dp_sink_cleanup(void);
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// Get the audio sample rate for the A2DP Sink module.
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tA2DP_SAMPLE_RATE btif_a2dp_sink_get_sample_rate(void);
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// Get the audio channel count for the A2DP Sink module.
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tA2DP_CHANNEL_COUNT btif_a2dp_sink_get_channel_count(void);
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// Get the audio bits per sample for the A2DP Sink module.
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tA2DP_BITS_PER_SAMPLE btif_a2dp_sink_get_bits_per_sample(void);
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// Update the decoder for the A2DP Sink module.
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// |p_codec_info| contains the new codec information.
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void btif_a2dp_sink_update_decoder(const uint8_t* p_codec_info);
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// Process 'idle' request from the BTIF state machine during initialization.
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void btif_a2dp_sink_on_idle(void);
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// Process 'stop' request from the BTIF state machine to stop A2DP streaming.
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// |p_av_suspend| is the data associated with the request - see
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// |tBTA_AV_SUSPEND|.
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void btif_a2dp_sink_on_stopped(tBTA_AV_SUSPEND* p_av_suspend);
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// Process 'suspend' request from the BTIF state machine to suspend A2DP
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// streaming.
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// |p_av_suspend| is the data associated with the request - see
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// |tBTA_AV_SUSPEND|.
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void btif_a2dp_sink_on_suspended(tBTA_AV_SUSPEND* p_av_suspend);
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// Start the decoder for the A2DP Sink module.
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bool btif_a2dp_sink_on_start(void);
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// Enable/disable discarding of received A2DP frames.
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// If |enable| is true, the discarding is enabled, otherwise is disabled.
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void btif_a2dp_sink_set_rx_flush(bool enable);
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// Enqueue a buffer to the A2DP Sink queue. If the queue has reached its
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// maximum size |MAX_INPUT_A2DP_FRAME_QUEUE_SZ|, the oldest buffer is
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// removed from the queue.
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// |p_buf| is the buffer to enqueue.
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// Returns the number of buffers in the Sink queue after the enqueing.
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uint8_t btif_a2dp_sink_enqueue_buf(BT_HDR* p_buf);
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// Dump debug-related information for the A2DP Sink module.
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// |fd| is the file descriptor to use for writing the ASCII formatted
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// information.
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void btif_a2dp_sink_debug_dump(int fd);
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// Create a request to set the audio focus state for the audio track.
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// |state| is the new state value - see |btif_a2dp_sink_focus_state_t|
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// for valid values.
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void btif_a2dp_sink_set_focus_state_req(btif_a2dp_sink_focus_state_t state);
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// Set the audio track gain for the audio track.
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// |gain| is the audio track gain value to use.
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void btif_a2dp_sink_set_audio_track_gain(float gain);
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#endif /* BTIF_A2DP_SINK_H */
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