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avb: implement streams

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Add in input/output stream, setup the talker/listeners.
Implement IEC61883 audio packets, send and receive data.
Implement talker encoding.

With this, audio can be sent and received from MOTU M64.
This commit is contained in:
Wim Taymans 2022-04-05 18:10:27 +02:00
parent 460cedbc86
commit e0d6b2bb4f
15 changed files with 1083 additions and 94 deletions
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112
src/modules/module-avb/iec61883.h Normal file
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/* AVB support
*
* Copyright © 2022 Wim Taymans
*
* Permission is hereby granted, free of charge, to any person obtaining a
* copy of this software and associated documentation files (the "Software"),
* to deal in the Software without restriction, including without limitation
* the rights to use, copy, modify, merge, publish, distribute, sublicense,
* and/or sell copies of the Software, and to permit persons to whom the
* Software is furnished to do so, subject to the following conditions:
*
* The above copyright notice and this permission notice (including the next
* paragraph) shall be included in all copies or substantial portions of the
* Software.
*
* THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
* IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
* FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL
* THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
* LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING
* FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER
* DEALINGS IN THE SOFTWARE.
*/
#ifndef AVB_IEC61883_H
#define AVB_IEC61883_H
#include "packets.h"
struct avb_packet_iec61883 {
struct avb_ethernet_header eth;
uint32_t vlan;
uint8_t subtype;
#if __BYTE_ORDER == __BIG_ENDIAN
unsigned sv:1;
unsigned version:3;
unsigned mr:1;
unsigned _r1:1;
unsigned gv:1;
unsigned tv:1;
uint8_t seq_number;
unsigned _r2:7;
unsigned tu:1;
#elif __BYTE_ORDER == __LITTLE_ENDIAN
unsigned tv:1;
unsigned gv:1;
unsigned _r1:1;
unsigned mr:1;
unsigned version:3;
unsigned sv:1;
uint8_t seq_num;
unsigned tu:1;
unsigned _r2:7;
#endif
uint64_t stream_id;
uint32_t timestamp;
uint32_t gateway_info;
uint16_t data_len;
#if __BYTE_ORDER == __BIG_ENDIAN
uint8_t tag:2;
uint8_t channel:6;
uint8_t tcode:4;
uint8_t app:4;
uint8_t qi1:2; /* CIP Quadlet Indicator 1 */
uint8_t sid:6; /* CIP Source ID */
uint8_t dbs; /* CIP Data Block Size */
uint8_t fn:2; /* CIP Fraction Number */
uint8_t qpc:3; /* CIP Quadlet Padding Count */
uint8_t sph:1; /* CIP Source Packet Header */
uint8_t _r3:2;
uint8_t dbc; /* CIP Data Block Continuity */
uint8_t qi2:2; /* CIP Quadlet Indicator 2 */
uint8_t format_id:6; /* CIP Format ID */
#elif __BYTE_ORDER == __LITTLE_ENDIAN
uint8_t channel:6;
uint8_t tag:2;
uint8_t app:4;
uint8_t tcode:4;
uint8_t sid:6; /* CIP Source ID */
uint8_t qi1:2; /* CIP Quadlet Indicator 1 */
uint8_t dbs; /* CIP Data Block Size */
uint8_t _r3:2;
uint8_t sph:1; /* CIP Source Packet Header */
uint8_t qpc:3; /* CIP Quadlet Padding Count */
uint8_t fn:2; /* CIP Fraction Number */
uint8_t dbc; /* CIP Data Block Continuity */
uint8_t format_id:6; /* CIP Format ID */
uint8_t qi2:2; /* CIP Quadlet Indicator 2 */
#endif
uint8_t fdf; /* CIP Format Dependent Field */
uint16_t syt;
uint8_t payload[0];
} __attribute__ ((__packed__));
#endif /* AVB_IEC61883_H */