1 /* 2 * Copyright 2016 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 aptX Encoder 19 // 20 21 #ifndef A2DP_VENDOR_APTX_ENCODER_H 22 #define A2DP_VENDOR_APTX_ENCODER_H 23 24 #include <stddef.h> 25 #include <stdint.h> 26 27 #include "a2dp_codec_api.h" 28 #include "a2dp_vendor.h" 29 30 // Loads the A2DP aptX encoder. 31 // Return loading status 32 tLOADING_CODEC_STATUS A2DP_VendorLoadEncoderAptx(void); 33 34 // Unloads the A2DP aptX encoder. 35 void A2DP_VendorUnloadEncoderAptx(void); 36 37 // Initialize the A2DP aptX encoder. 38 // |p_peer_params| contains the A2DP peer information. 39 // The current A2DP codec config is in |a2dp_codec_config|. 40 // |read_callback| is the callback for reading the input audio data. 41 // |enqueue_callback| is the callback for enqueueing the encoded audio data. 42 void a2dp_vendor_aptx_encoder_init(const tA2DP_ENCODER_INIT_PEER_PARAMS* p_peer_params, 43 A2dpCodecConfig* a2dp_codec_config, 44 a2dp_source_read_callback_t read_callback, 45 a2dp_source_enqueue_callback_t enqueue_callback); 46 47 // Cleanup the A2DP aptX encoder. 48 void a2dp_vendor_aptx_encoder_cleanup(void); 49 50 // Reset the feeding for the A2DP aptX encoder. 51 void a2dp_vendor_aptx_feeding_reset(void); 52 53 // Flush the feeding for the A2DP aptX encoder. 54 void a2dp_vendor_aptx_feeding_flush(void); 55 56 // Get the A2DP aptX encoder interval (in milliseconds). 57 uint64_t a2dp_vendor_aptx_get_encoder_interval_ms(void); 58 59 // Get the A2DP aptX encoded maximum frame size 60 int a2dp_vendor_aptx_get_effective_frame_size(); 61 62 // Prepare and send A2DP aptX encoded frames. 63 // |timestamp_us| is the current timestamp (in microseconds). 64 void a2dp_vendor_aptx_send_frames(uint64_t timestamp_us); 65 66 typedef int (*tAPTX_ENCODER_INIT)(void* state, int16_t endian); 67 68 typedef int (*tAPTX_ENCODER_ENCODE_STEREO)(void* state, void* pcmL, void* pcmR, void* buffer); 69 70 typedef int (*tAPTX_ENCODER_SIZEOF_PARAMS)(void); 71 72 typedef struct { 73 tAPTX_ENCODER_INIT init_func; 74 tAPTX_ENCODER_ENCODE_STEREO encode_stereo_func; 75 tAPTX_ENCODER_SIZEOF_PARAMS sizeof_params_func; 76 } tAPTX_API; 77 78 // Filled the |external_api| with the ptr to the codec api 79 // return true if the codec is loaded 80 // This is for test purpose and ensure we are testing the api in real life 81 // condition 82 bool A2DP_VendorCopyAptxApi(tAPTX_API& external_api); 83 84 #endif // A2DP_VENDOR_APTX_ENCODER_H 85