1 /* 2 * Copyright (C) 2014 BlueKitchen GmbH 3 * 4 * Redistribution and use in source and binary forms, with or without 5 * modification, are permitted provided that the following conditions 6 * are met: 7 * 8 * 1. Redistributions of source code must retain the above copyright 9 * notice, this list of conditions and the following disclaimer. 10 * 2. Redistributions in binary form must reproduce the above copyright 11 * notice, this list of conditions and the following disclaimer in the 12 * documentation and/or other materials provided with the distribution. 13 * 3. Neither the name of the copyright holders nor the names of 14 * contributors may be used to endorse or promote products derived 15 * from this software without specific prior written permission. 16 * 4. Any redistribution, use, or modification is done solely for 17 * personal benefit and not for any commercial purpose or for 18 * monetary gain. 19 * 20 * THIS SOFTWARE IS PROVIDED BY BLUEKITCHEN GMBH AND CONTRIBUTORS 21 * ``AS IS'' AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT 22 * LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS 23 * FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL MATTHIAS 24 * RINGWALD OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, 25 * INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, 26 * BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS 27 * OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED 28 * AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, 29 * OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF 30 * THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF 31 * SUCH DAMAGE. 32 * 33 * Please inquire about commercial licensing options at 34 * [email protected] 35 * 36 */ 37 38 /* 39 * btstack_sbc.h 40 * 41 */ 42 43 #ifndef __BTSTACK_SBC_H 44 #define __BTSTACK_SBC_H 45 46 #include <stdint.h> 47 #include "btstack_sbc_plc.h" 48 49 typedef enum{ 50 SBC_MODE_STANDARD, 51 SBC_MODE_mSBC 52 } btstack_sbc_mode_t; 53 54 typedef struct { 55 void * context; 56 void (*handle_pcm_data)(int16_t * data, int num_samples, int num_channels, int sample_rate, void * context); 57 // private 58 void * decoder_state; 59 btstack_sbc_plc_state_t plc_state; 60 btstack_sbc_mode_t mode; 61 62 // summary of processed good, bad and zero frames 63 int good_frames_nr; 64 int bad_frames_nr; 65 int zero_frames_nr; 66 } btstack_sbc_decoder_state_t; 67 68 typedef struct { 69 // private 70 void * encoder_state; 71 btstack_sbc_mode_t mode; 72 } btstack_sbc_encoder_state_t; 73 74 /* API_START */ 75 76 /* BTstack SBC decoder */ 77 /** 78 * @brief Init SBC decoder 79 * @param state 80 * @param mode 81 * @param callback for decoded PCM data 82 * @param context provided in callback 83 */ 84 85 void btstack_sbc_decoder_init(btstack_sbc_decoder_state_t * state, btstack_sbc_mode_t mode, void (*callback)(int16_t * data, int num_samples, int num_channels, int sample_rate, void * context), void * context); 86 87 /** 88 * @brief Process received SCO data 89 * @param state 90 * @param packet_status_flag from SCO packet: 0 = OK, 1 = possibly invalid data, 2 = no data received, 3 = data partially lost 91 * @param buffer 92 * @param size 93 */ 94 void btstack_sbc_decoder_process_data(btstack_sbc_decoder_state_t * state, int packet_status_flag, uint8_t * buffer, int size); 95 96 /** 97 * @brief Get number of samples per SBC frame 98 */ 99 int btstack_sbc_decoder_num_samples_per_frame(btstack_sbc_decoder_state_t * state); 100 101 /* 102 * @brief Get number of channels 103 */ 104 int btstack_sbc_decoder_num_channels(btstack_sbc_decoder_state_t * state); 105 106 /* 107 * @brief Get sample rate in hz 108 */ 109 int btstack_sbc_decoder_sample_rate(btstack_sbc_decoder_state_t * state); 110 111 112 /* BTstack SBC Encoder */ 113 /** 114 * @brief Init SBC encoder 115 * @param state 116 * @param mode 117 * @param blocks 118 * @param subbands 119 * @param allocation_method 120 * @param sample_rate 121 * @param bitpool 122 */ 123 void btstack_sbc_encoder_init(btstack_sbc_encoder_state_t * state, btstack_sbc_mode_t mode, 124 int blocks, int subbands, int allocation_method, int sample_rate, int bitpool); 125 126 /** 127 * @brief Process received PCM data 128 * @param buffer 129 */ 130 void btstack_sbc_encoder_process_data(int16_t * input_buffer); 131 132 /** 133 * @brief Return SBC frame 134 */ 135 uint8_t * btstack_sbc_encoder_sbc_buffer(void); 136 137 /** 138 * @brief Return SBC frame length 139 */ 140 uint16_t btstack_sbc_encoder_sbc_buffer_length(void); 141 142 /** 143 * @brief Return number of audio samples in one PCM frame 144 */ 145 int btstack_sbc_encoder_num_audio_samples(void); 146 147 /* API_END */ 148 149 // testing only 150 void btstack_sbc_decoder_test_disable_plc(void); 151 void btstack_sbc_decoder_test_simulate_corrupt_frames(int period); 152 153 #if defined __cplusplus 154 } 155 #endif 156 157 #endif // __BTSTACK_SBC_H