1 /****************************************************************************** 2 * 3 * Copyright 2015 Broadcom Corporation 4 * 5 * Licensed under the Apache License, Version 2.0 (the "License"); 6 * you may not use this file except in compliance with the License. 7 * You may obtain a copy of the License at: 8 * 9 * http://www.apache.org/licenses/LICENSE-2.0 10 * 11 * Unless required by applicable law or agreed to in writing, software 12 * distributed under the License is distributed on an "AS IS" BASIS, 13 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. 14 * See the License for the specific language governing permissions and 15 * limitations under the License. 16 * 17 ******************************************************************************/ 18 19 #pragma once 20 21 #include <stdint.h> 22 23 /******************* 24 * SCO Codec Types 25 *******************/ 26 typedef enum { 27 SCO_CODEC_NONE = 0x0000, 28 SCO_CODEC_CVSD = 0x0001, 29 SCO_CODEC_MSBC = 0x0002, 30 } sco_codec_t; 31 32 typedef enum { 33 ESCO_CODEC_CVSD = 0, 34 ESCO_CODEC_MSBC_T1, 35 ESCO_CODEC_MSBC_T2, 36 } esco_codec_t; 37 38 #define ESCO_NUM_CODECS 3 39 40 // Coding Formats (BT 4.1 or later Assigned numbers) 41 #define ESCO_CODING_FORMAT_ULAW ((uint8_t)0x00) /* u-Law log */ 42 #define ESCO_CODING_FORMAT_ALAW ((uint8_t)0x01) /* A-Law log */ 43 #define ESCO_CODING_FORMAT_CVSD ((uint8_t)0x02) /* CVSD */ 44 #define ESCO_CODING_FORMAT_TRANSPNT ((uint8_t)0x03) /* Transparent */ 45 #define ESCO_CODING_FORMAT_LINEAR ((uint8_t)0x04) /* Linear PCM */ 46 #define ESCO_CODING_FORMAT_MSBC ((uint8_t)0x05) /* MSBC PCM */ 47 #define ESCO_CODING_FORMAT_VS ((uint8_t)0xFF) /* Specifies VSC used */ 48 typedef uint8_t esco_coding_format_t; 49 50 // PCM Data Formats (BT 4.1 or later Assigned numbers) 51 #define ESCO_PCM_DATA_FORMAT_NA \ 52 ((uint8_t)0x00) /* N/A to coding format in use */ 53 #define ESCO_PCM_DATA_FORMAT_1_COMP ((uint8_t)0x01) /* 1's complement */ 54 #define ESCO_PCM_DATA_FORMAT_2_COMP ((uint8_t)0x02) /* 2's complement */ 55 #define ESCO_PCM_DATA_FORMAT_SIGN ((uint8_t)0x03) /* Sign-magnitude */ 56 #define ESCO_PCM_DATA_FORMAT_UNSIGN ((uint8_t)0x04) /* Unsigned */ 57 typedef uint8_t esco_pcm_data_format_t; 58 59 // SCO Data Path 60 #define ESCO_DATA_PATH_PCM 1 /* 0x01-0xFE (PCM Chan) */ 61 #define ESCO_DATA_PATH_HCI ((uint8_t)0x00) /* HCI-0, 0x01-0xFE (PCM Chan) */ 62 #define ESCO_DATA_PATH_TEST ((uint8_t)0xFF) /* 0xFF-Audio Test */ 63 typedef uint8_t esco_data_path_t; 64 65 // eSCO constants 66 #define TXRX_64KBITS_RATE 0x00001f40 /* 64 kbits/sec data rate */ 67 #define TXRX_128KBITS_RATE 0x00003E80 /* 128 kbits/sec data rate */ 68 typedef uint32_t esco_txrx_bandwidth_t; 69 70 #define INPUT_OUTPUT_64K_RATE 0x00003E80 /* 16000 Bytes/sec over transport */ 71 #define INPUT_OUTPUT_128K_RATE 0x00007D00 /* 32000 Bytes/sec over transport */ 72 typedef uint32_t esco_io_bandwidth_t; 73 74 // Retransmission effort 75 #define ESCO_RETRANSMISSION_OFF 0 76 #define ESCO_RETRANSMISSION_POWER 1 77 #define ESCO_RETRANSMISSION_QUALITY 2 78 #define ESCO_RETRANSMISSION_DONTCARE 0xff 79 typedef uint8_t esco_retransmission_effort_t; 80 81 // Definitions for eSCO packet type masks (BT1.2 and BT2.0 definitions) 82 #define ESCO_PKT_TYPES_MASK_HV1 0x0001 83 #define ESCO_PKT_TYPES_MASK_HV2 0x0002 84 #define ESCO_PKT_TYPES_MASK_HV3 0x0004 85 #define ESCO_PKT_TYPES_MASK_EV3 0x0008 86 #define ESCO_PKT_TYPES_MASK_EV4 0x0010 87 #define ESCO_PKT_TYPES_MASK_EV5 0x0020 88 #define ESCO_PKT_TYPES_MASK_NO_2_EV3 0x0040 89 #define ESCO_PKT_TYPES_MASK_NO_3_EV3 0x0080 90 #define ESCO_PKT_TYPES_MASK_NO_2_EV5 0x0100 91 #define ESCO_PKT_TYPES_MASK_NO_3_EV5 0x0200 92 typedef uint16_t esco_packet_types_t; 93 94 // type definition 95 typedef struct { 96 esco_coding_format_t coding_format; /* Coding Format*/ 97 uint16_t company_id; /* Company ID from BT SIG Assigned Numbers */ 98 uint16_t vendor_specific_codec_id; /* Vendor Specific Codec ID */ 99 } esco_coding_id_format_t; 100 101 // Enhanced setup/accept synchronous connection See BT 4.1 or later HCI spec for 102 // details 103 typedef struct { 104 esco_txrx_bandwidth_t 105 transmit_bandwidth; /* Transmit Bandwidth (in octets/second) */ 106 esco_txrx_bandwidth_t receive_bandwidth; /* RX BW (# of octets/second) */ 107 esco_coding_id_format_t transmit_coding_format; /* TX coding format */ 108 esco_coding_id_format_t receive_coding_format; /* RX coding format */ 109 uint16_t transmit_codec_frame_size; /* TX CODEC frame size (OTA frame size) */ 110 uint16_t receive_codec_frame_size; /* RX CODEC frame size (OTA frame size) */ 111 esco_io_bandwidth_t input_bandwidth; /* Input BW (nominal rate octets/sec) */ 112 esco_io_bandwidth_t 113 output_bandwidth; /* Output BW (nominal rate octets/sec) */ 114 esco_coding_id_format_t input_coding_format; /* Input coding format */ 115 esco_coding_id_format_t output_coding_format; /* Output coding format */ 116 uint16_t input_coded_data_size; /* Input coded data size (in bits) */ 117 uint16_t output_coded_data_size; /* Output coded data size (in bits) */ 118 esco_pcm_data_format_t 119 input_pcm_data_format; /* Input PCM data format (see hcidefs.h) */ 120 esco_pcm_data_format_t 121 output_pcm_data_format; /* Output PCM data format (see hcidefs.h) */ 122 uint8_t input_pcm_payload_msb_position; /* Input PCM sample payload MSB 123 position */ 124 uint8_t output_pcm_payload_msb_position; /* Output PCM sample payload MSB 125 position */ 126 esco_data_path_t input_data_path; /* 0x00 - HCI, or 0x01-0xFE for VS) */ 127 esco_data_path_t output_data_path; /* 0x00 - HCI, or 0x01-0xFE for VS) */ 128 uint8_t input_transport_unit_size; /* Input transport unit size */ 129 uint8_t output_transport_unit_size; /* Output transport unit size */ 130 uint16_t max_latency_ms; /* Maximum latency (0x4-0xFFFE in msecs) */ 131 esco_packet_types_t packet_types; /* Packet Types */ 132 esco_retransmission_effort_t 133 retransmission_effort; /* 0x00-0x02, 0xFF don't care */ 134 } enh_esco_params_t; 135 136 // Get the enhanced eSCO configuration parameters for the provided |codec| 137 enh_esco_params_t esco_parameters_for_codec(esco_codec_t codec); 138