| /****************************************************************************** |
| * |
| * Copyright 2003-2012 Broadcom Corporation |
| * |
| * Licensed under the Apache License, Version 2.0 (the "License"); |
| * you may not use this file except in compliance with the License. |
| * You may obtain a copy of the License at: |
| * |
| * http://www.apache.org/licenses/LICENSE-2.0 |
| * |
| * Unless required by applicable law or agreed to in writing, software |
| * distributed under the License is distributed on an "AS IS" BASIS, |
| * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. |
| * See the License for the specific language governing permissions and |
| * limitations under the License. |
| * |
| ******************************************************************************/ |
| |
| /****************************************************************************** |
| * |
| * This contains constants definitions and other information from the AVCTP |
| * specification. This file is intended for use internal to AVCT only. |
| * |
| ******************************************************************************/ |
| #ifndef AVCT_DEFS_H |
| #define AVCT_DEFS_H |
| |
| /***************************************************************************** |
| * constants |
| ****************************************************************************/ |
| |
| /* packet type */ |
| #define AVCT_PKT_TYPE_SINGLE 0 /* single packet */ |
| #define AVCT_PKT_TYPE_START 1 /* start packet */ |
| #define AVCT_PKT_TYPE_CONT 2 /* continue packet */ |
| #define AVCT_PKT_TYPE_END 3 /* end packet */ |
| |
| /* header lengths for different packet types */ |
| #define AVCT_HDR_LEN_SINGLE 3 |
| #define AVCT_HDR_LEN_START 4 |
| #define AVCT_HDR_LEN_CONT 1 |
| #define AVCT_HDR_LEN_END 1 |
| |
| /* invalid cr+ipid value */ |
| #define AVCT_CR_IPID_INVALID 1 |
| |
| /***************************************************************************** |
| * message parsing and building macros |
| ****************************************************************************/ |
| |
| #define AVCT_BUILD_HDR(p, label, type, cr_ipid) \ |
| *(p)++ = ((label) << 4) | ((type) << 2) | (cr_ipid); |
| |
| #define AVCT_PARSE_HDR(p, label, type, cr_ipid) \ |
| do { \ |
| (label) = *(p) >> 4; \ |
| (type) = (*(p) >> 2) & 3; \ |
| (cr_ipid) = *(p)++ & 3; \ |
| } while (0) |
| |
| #define AVCT_PKT_TYPE(p) ((*(p) >> 2) & 3) |
| |
| #endif /* AVCT_DEFS_H */ |