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 // 21 // Interface to the A2DP SBC Encoder 22 // 23 24 #ifndef A2DP_SBC_ENCODER_H 25 #define A2DP_SBC_ENCODER_H 26 27 #include <stddef.h> 28 #include <stdint.h> 29 30 #include "a2dp_codec_api.h" 31 32 // Loads the A2DP SBC encoder. 33 // Return true on success, otherwise false. 34 bool A2DP_LoadEncoderSbc(void); 35 36 // Unloads the A2DP SBC encoder. 37 void A2DP_UnloadEncoderSbc(void); 38 39 // Initialize the A2DP SBC encoder. 40 // |p_peer_params| contains the A2DP peer information 41 // The current A2DP codec config is in |a2dp_codec_config|. 42 // |read_callback| is the callback for reading the input audio data. 43 // |enqueue_callback| is the callback for enqueueing the encoded audio data. 44 void a2dp_sbc_encoder_init(const tA2DP_ENCODER_INIT_PEER_PARAMS* p_peer_params, 45 A2dpCodecConfig* a2dp_codec_config, 46 a2dp_source_read_callback_t read_callback, 47 a2dp_source_enqueue_callback_t enqueue_callback); 48 49 // Cleanup the A2DP SBC encoder. 50 void a2dp_sbc_encoder_cleanup(void); 51 52 // Reset the feeding for the A2DP SBC encoder. 53 void a2dp_sbc_feeding_reset(void); 54 55 // Flush the feeding for the A2DP SBC encoder. 56 void a2dp_sbc_feeding_flush(void); 57 58 // Get the A2DP SBC encoder interval (in milliseconds). 59 uint64_t a2dp_sbc_get_encoder_interval_ms(void); 60 61 // Get the A2DP SBC encoded maximum frame size 62 int a2dp_sbc_get_effective_frame_size(); 63 64 // Prepare and send A2DP SBC encoded frames. 65 // |timestamp_us| is the current timestamp (in microseconds). 66 void a2dp_sbc_send_frames(uint64_t timestamp_us); 67 68 // Get SBC bitrate 69 // Returns |uint32_t| bitrate in bits per second 70 uint32_t a2dp_sbc_get_bitrate(); 71 #endif // A2DP_SBC_ENCODER_H 72