1 /*
2  * Copyright 2021 The Android Open Source Project
3  *
4  * Licensed under the Apache License, Version 2.0 (the "License");
5  * you may not use this file except in compliance with the License.
6  * You may obtain a copy of the License at
7  *
8  *      http://www.apache.org/licenses/LICENSE-2.0
9  *
10  * Unless required by applicable law or agreed to in writing, software
11  * distributed under the License is distributed on an "AS IS" BASIS,
12  * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
13  * See the License for the specific language governing permissions and
14  * limitations under the License.
15  */
16 
17 //
18 // Interface to the A2DP Opus Encoder
19 //
20 
21 #ifndef A2DP_VENDOR_OPUS_ENCODER_H
22 #define A2DP_VENDOR_OPUS_ENCODER_H
23 
24 #include "a2dp_codec_api.h"
25 
26 // Initialize the A2DP Opus encoder.
27 // |p_peer_params| contains the A2DP peer information
28 // The current A2DP codec config is in |a2dp_codec_config|.
29 // |read_callback| is the callback for reading the input audio data.
30 // |enqueue_callback| is the callback for enqueueing the encoded audio data.
31 void a2dp_vendor_opus_encoder_init(const tA2DP_ENCODER_INIT_PEER_PARAMS* p_peer_params,
32                                    A2dpCodecConfig* a2dp_codec_config,
33                                    a2dp_source_read_callback_t read_callback,
34                                    a2dp_source_enqueue_callback_t enqueue_callback);
35 
36 // Cleanup the A2DP Opus encoder.
37 void a2dp_vendor_opus_encoder_cleanup(void);
38 
39 // Reset the feeding for the A2DP Opus encoder.
40 void a2dp_vendor_opus_feeding_reset(void);
41 
42 // Flush the feeding for the A2DP Opus encoder.
43 void a2dp_vendor_opus_feeding_flush(void);
44 
45 // Get the A2DP Opus encoder interval (in milliseconds).
46 uint64_t a2dp_vendor_opus_get_encoder_interval_ms(void);
47 
48 // Prepare and send A2DP Opus encoded frames.
49 // |timestamp_us| is the current timestamp (in microseconds).
50 void a2dp_vendor_opus_send_frames(uint64_t timestamp_us);
51 
52 // Set transmit queue length for the A2DP Opus (Dynamic Bit Rate) mechanism.
53 void a2dp_vendor_opus_set_transmit_queue_length(size_t transmit_queue_length);
54 
55 // Get the A2DP Opus encoded maximum frame size
56 int a2dp_vendor_opus_get_effective_frame_size();
57 
58 #endif  // A2DP_VENDOR_OPUS_ENCODER_H
59