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1 1 : /** @file 2 : * @brief Advance Audio Distribution Profile - SBC Codec header. 3 : */ 4 : /* 5 : * SPDX-License-Identifier: Apache-2.0 6 : * Copyright (c) 2015-2016 Intel Corporation 7 : * Copyright (c) 2021 NXP 8 : * 9 : * Licensed under the Apache License, Version 2.0 (the "License"); 10 : * you may not use this file except in compliance with the License. 11 : * You may obtain a copy of the License at 12 : * 13 : * http://www.apache.org/licenses/LICENSE-2.0 14 : * 15 : * Unless required by applicable law or agreed to in writing, software 16 : * distributed under the License is distributed on an "AS IS" BASIS, 17 : * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. 18 : * See the License for the specific language governing permissions and 19 : * limitations under the License. 20 : */ 21 : #ifndef ZEPHYR_INCLUDE_BLUETOOTH_A2DP_CODEC_H_ 22 : #define ZEPHYR_INCLUDE_BLUETOOTH_A2DP_CODEC_H_ 23 : 24 : #ifdef __cplusplus 25 : extern "C" { 26 : #endif 27 : 28 : /* Sampling Frequency */ 29 0 : #define A2DP_SBC_SAMP_FREQ_16000 BIT(7) 30 0 : #define A2DP_SBC_SAMP_FREQ_32000 BIT(6) 31 0 : #define A2DP_SBC_SAMP_FREQ_44100 BIT(5) 32 0 : #define A2DP_SBC_SAMP_FREQ_48000 BIT(4) 33 : 34 : /* Channel Mode */ 35 0 : #define A2DP_SBC_CH_MODE_MONO BIT(3) 36 0 : #define A2DP_SBC_CH_MODE_DUAL BIT(2) 37 0 : #define A2DP_SBC_CH_MODE_STREO BIT(1) 38 0 : #define A2DP_SBC_CH_MODE_JOINT BIT(0) 39 : 40 : /* Block Length */ 41 0 : #define A2DP_SBC_BLK_LEN_4 BIT(7) 42 0 : #define A2DP_SBC_BLK_LEN_8 BIT(6) 43 0 : #define A2DP_SBC_BLK_LEN_12 BIT(5) 44 0 : #define A2DP_SBC_BLK_LEN_16 BIT(4) 45 : 46 : /* Subbands */ 47 0 : #define A2DP_SBC_SUBBAND_4 BIT(3) 48 0 : #define A2DP_SBC_SUBBAND_8 BIT(2) 49 : 50 : /* Allocation Method */ 51 0 : #define A2DP_SBC_ALLOC_MTHD_SNR BIT(1) 52 0 : #define A2DP_SBC_ALLOC_MTHD_LOUDNESS BIT(0) 53 : 54 0 : #define BT_A2DP_SBC_SAMP_FREQ(cap) ((cap->config[0] >> 4) & 0x0f) 55 0 : #define BT_A2DP_SBC_CHAN_MODE(cap) ((cap->config[0]) & 0x0f) 56 0 : #define BT_A2DP_SBC_BLK_LEN(cap) ((cap->config[1] >> 4) & 0x0f) 57 0 : #define BT_A2DP_SBC_SUB_BAND(cap) ((cap->config[1] >> 2) & 0x03) 58 0 : #define BT_A2DP_SBC_ALLOC_MTHD(cap) ((cap->config[1]) & 0x03) 59 : 60 : /** @brief SBC Codec */ 61 1 : struct bt_a2dp_codec_sbc_params { 62 : /** First two octets of configuration */ 63 1 : uint8_t config[2]; 64 : /** Minimum Bitpool Value */ 65 1 : uint8_t min_bitpool; 66 : /** Maximum Bitpool Value */ 67 1 : uint8_t max_bitpool; 68 : } __packed; 69 : 70 : /** If the F bit is set to 0, this field indicates the number of frames contained 71 : * in this packet. If the F bit is set to 1, this field indicates the number 72 : * of remaining fragments, including the current fragment. 73 : * Therefore, the last counter value shall be one. 74 : */ 75 1 : #define BT_A2DP_SBC_MEDIA_HDR_NUM_FRAMES_GET(hdr) FIELD_GET(GENMASK(3, 0), (hdr)) 76 : /** Set to 1 for the last packet of a fragmented SBC frame, otherwise set to 0. */ 77 1 : #define BT_A2DP_SBC_MEDIA_HDR_L_GET(hdr) FIELD_GET(BIT(5), (hdr)) 78 : /** Set to 1 for the starting packet of a fragmented SBC frame, otherwise set to 0. */ 79 1 : #define BT_A2DP_SBC_MEDIA_HDR_S_GET(hdr) FIELD_GET(BIT(6), (hdr)) 80 : /** Set to 1 if the SBC frame is fragmented, otherwise set to 0. */ 81 1 : #define BT_A2DP_SBC_MEDIA_HDR_F_GET(hdr) FIELD_GET(BIT(7), (hdr)) 82 : 83 : /** If the F bit is set to 0, this field indicates the number of frames contained 84 : * in this packet. If the F bit is set to 1, this field indicates the number 85 : * of remaining fragments, including the current fragment. 86 : * Therefore, the last counter value shall be one. 87 : */ 88 1 : #define BT_A2DP_SBC_MEDIA_HDR_NUM_FRAMES_SET(hdr, val)\ 89 : hdr = ((hdr) & ~GENMASK(3, 0)) | FIELD_PREP(GENMASK(3, 0), (val)) 90 : /** Set to 1 for the last packet of a fragmented SBC frame, otherwise set to 0. */ 91 1 : #define BT_A2DP_SBC_MEDIA_HDR_L_SET(hdr, val)\ 92 : hdr = ((hdr) & ~BIT(5)) | FIELD_PREP(BIT(5), (val)) 93 : /** Set to 1 for the starting packet of a fragmented SBC frame, otherwise set to 0. */ 94 1 : #define BT_A2DP_SBC_MEDIA_HDR_S_SET(hdr, val)\ 95 : hdr = ((hdr) & ~BIT(6)) | FIELD_PREP(BIT(6), (val)) 96 : /** Set to 1 if the SBC frame is fragmented, otherwise set to 0. */ 97 1 : #define BT_A2DP_SBC_MEDIA_HDR_F_SET(hdr, val)\ 98 : hdr = ((hdr) & ~BIT(7)) | FIELD_PREP(BIT(7), (val)) 99 : 100 0 : #define BT_A2DP_SBC_MEDIA_HDR_ENCODE(num_frames, l, s, f)\ 101 : FIELD_PREP(GENMASK(3, 0), num_frames) | FIELD_PREP(BIT(5), l) |\ 102 : FIELD_PREP(BIT(6), s) | FIELD_PREP(BIT(7), f) 103 : 104 : /** @brief get channel num of a2dp sbc config. 105 : * 106 : * @param sbc_codec The a2dp sbc parameter. 107 : * 108 : * @return the channel num. 109 : */ 110 1 : uint8_t bt_a2dp_sbc_get_channel_num(struct bt_a2dp_codec_sbc_params *sbc_codec); 111 : 112 : /** @brief get sample rate of a2dp sbc config. 113 : * 114 : * @param sbc_codec The a2dp sbc parameter. 115 : * 116 : * @return the sample rate. 117 : */ 118 1 : uint32_t bt_a2dp_sbc_get_sampling_frequency(struct bt_a2dp_codec_sbc_params *sbc_codec); 119 : 120 : #ifdef __cplusplus 121 : } 122 : #endif 123 : 124 : #endif /* ZEPHYR_INCLUDE_BLUETOOTH_A2DP_CODEC_H_ */
