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/*
* Copyright (c) 2017, Intel Corporation
*
* Redistribution and use in source and binary forms, with or without
* modification, are permitted provided that the following conditions are met:
*
* * Redistributions of source code must retain the above copyright notice,
* this list of conditions and the following disclaimer.
* * Redistributions in binary form must reproduce the above copyright
* notice, this list of conditions and the following disclaimer in the
* documentation and/or other materials provided with the distribution.
* * Neither the name of Intel Corporation nor the names of its contributors
* may be used to endorse or promote products derived from this software
* without specific prior written permission.
*
* THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS"
* AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
* IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE
* DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT OWNER OR CONTRIBUTORS BE LIABLE
* FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
* DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR
* SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER
* CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY,
* OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
* OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
*/
#include <arpa/inet.h>
#include <endian.h>
#include <string.h>
#include "avtp.h"
#include "avtp_aaf.h"
#include "util.h"
#define SHIFT_SV (31 - 8)
#define SHIFT_MR (31 - 12)
#define SHIFT_TV (31 - 15)
#define SHIFT_SEQ_NUM (31 - 23)
#define SHIFT_FORMAT (31 - 7)
#define SHIFT_NSR (31 - 11)
#define SHIFT_CHAN_PER_FRAME (31 - 23)
#define SHIFT_STREAM_DATA_LEN (31 - 15)
#define SHIFT_SP (31 - 19)
#define SHIFT_EVT (31 - 23)
#define MASK_SV (BITMASK(1) << SHIFT_SV)
#define MASK_MR (BITMASK(1) << SHIFT_MR)
#define MASK_TV (BITMASK(1) << SHIFT_TV)
#define MASK_SEQ_NUM (BITMASK(8) << SHIFT_SEQ_NUM)
#define MASK_TU (BITMASK(1))
#define MASK_FORMAT (BITMASK(8) << SHIFT_FORMAT)
#define MASK_NSR (BITMASK(4) << SHIFT_NSR)
#define MASK_CHAN_PER_FRAME (BITMASK(10) << SHIFT_CHAN_PER_FRAME)
#define MASK_BIT_DEPTH (BITMASK(8))
#define MASK_STREAM_DATA_LEN (BITMASK(16) << SHIFT_STREAM_DATA_LEN)
#define MASK_SP (BITMASK(1) << SHIFT_SP)
#define MASK_EVT (BITMASK(4) << SHIFT_EVT)
static int get_field_value(const struct avtp_stream_pdu *pdu,
enum avtp_aaf_field field, uint64_t *val)
{
uint32_t bitmap, mask;
uint8_t shift;
switch (field) {
case AVTP_AAF_FIELD_SV:
mask = MASK_SV;
shift = SHIFT_SV;
bitmap = ntohl(pdu->subtype_data);
break;
case AVTP_AAF_FIELD_MR:
mask = MASK_MR;
shift = SHIFT_MR;
bitmap = ntohl(pdu->subtype_data);
break;
case AVTP_AAF_FIELD_TV:
mask = MASK_TV;
shift = SHIFT_TV;
bitmap = ntohl(pdu->subtype_data);
break;
case AVTP_AAF_FIELD_SEQ_NUM:
mask = MASK_SEQ_NUM;
shift = SHIFT_SEQ_NUM;
bitmap = ntohl(pdu->subtype_data);
break;
case AVTP_AAF_FIELD_TU:
mask = MASK_TU;
shift = 0;
bitmap = ntohl(pdu->subtype_data);
break;
case AVTP_AAF_FIELD_FORMAT:
mask = MASK_FORMAT;
shift = SHIFT_FORMAT;
bitmap = ntohl(pdu->format_specific);
break;
case AVTP_AAF_FIELD_NSR:
mask = MASK_NSR;
shift = SHIFT_NSR;
bitmap = ntohl(pdu->format_specific);
break;
case AVTP_AAF_FIELD_CHAN_PER_FRAME:
mask = MASK_CHAN_PER_FRAME;
shift = SHIFT_CHAN_PER_FRAME;
bitmap = ntohl(pdu->format_specific);
break;
case AVTP_AAF_FIELD_BIT_DEPTH:
mask = MASK_BIT_DEPTH;
shift = 0;
bitmap = ntohl(pdu->format_specific);
break;
case AVTP_AAF_FIELD_STREAM_DATA_LEN:
mask = MASK_STREAM_DATA_LEN;
shift = SHIFT_STREAM_DATA_LEN;
bitmap = ntohl(pdu->packet_info);
break;
case AVTP_AAF_FIELD_SP:
mask = MASK_SP;
shift = SHIFT_SP;
bitmap = ntohl(pdu->packet_info);
break;
case AVTP_AAF_FIELD_EVT:
mask = MASK_EVT;
shift = SHIFT_EVT;
bitmap = ntohl(pdu->packet_info);
break;
default:
return -EINVAL;
}
*val = BITMAP_GET_VALUE(bitmap, mask, shift);
return 0;
}
int avtp_aaf_pdu_get(const struct avtp_stream_pdu *pdu,
enum avtp_aaf_field field, uint64_t *val)
{
int res;
if (!pdu || !val)
return -EINVAL;
switch (field) {
case AVTP_AAF_FIELD_SV:
case AVTP_AAF_FIELD_MR:
case AVTP_AAF_FIELD_TV:
case AVTP_AAF_FIELD_SEQ_NUM:
case AVTP_AAF_FIELD_TU:
case AVTP_AAF_FIELD_FORMAT:
case AVTP_AAF_FIELD_NSR:
case AVTP_AAF_FIELD_CHAN_PER_FRAME:
case AVTP_AAF_FIELD_BIT_DEPTH:
case AVTP_AAF_FIELD_STREAM_DATA_LEN:
case AVTP_AAF_FIELD_SP:
case AVTP_AAF_FIELD_EVT:
res = get_field_value(pdu, field, val);
break;
case AVTP_AAF_FIELD_TIMESTAMP:
*val = ntohl(pdu->avtp_time);
res = 0;
break;
case AVTP_AAF_FIELD_STREAM_ID:
*val = be64toh(pdu->stream_id);
res = 0;
break;
default:
res = -EINVAL;
break;
}
return res;
}
static int set_field_value(struct avtp_stream_pdu *pdu,
enum avtp_aaf_field field, uint32_t val)
{
uint32_t *ptr, bitmap, mask;
uint8_t shift;
switch (field) {
case AVTP_AAF_FIELD_SV:
mask = MASK_SV;
shift = SHIFT_SV;
ptr = &pdu->subtype_data;
break;
case AVTP_AAF_FIELD_MR:
mask = MASK_MR;
shift = SHIFT_MR;
ptr = &pdu->subtype_data;
break;
case AVTP_AAF_FIELD_TV:
mask = MASK_TV;
shift = SHIFT_TV;
ptr = &pdu->subtype_data;
break;
case AVTP_AAF_FIELD_SEQ_NUM:
mask = MASK_SEQ_NUM;
shift = SHIFT_SEQ_NUM;
ptr = &pdu->subtype_data;
break;
case AVTP_AAF_FIELD_TU:
mask = MASK_TU;
shift = 0;
ptr = &pdu->subtype_data;
break;
case AVTP_AAF_FIELD_FORMAT:
mask = MASK_FORMAT;
shift = SHIFT_FORMAT;
ptr = &pdu->format_specific;
break;
case AVTP_AAF_FIELD_NSR:
mask = MASK_NSR;
shift = SHIFT_NSR;
ptr = &pdu->format_specific;
break;
case AVTP_AAF_FIELD_CHAN_PER_FRAME:
mask = MASK_CHAN_PER_FRAME;
shift = SHIFT_CHAN_PER_FRAME;
ptr = &pdu->format_specific;
break;
case AVTP_AAF_FIELD_BIT_DEPTH:
mask = MASK_BIT_DEPTH;
shift = 0;
ptr = &pdu->format_specific;
break;
case AVTP_AAF_FIELD_STREAM_DATA_LEN:
mask = MASK_STREAM_DATA_LEN;
shift = SHIFT_STREAM_DATA_LEN;
ptr = &pdu->packet_info;
break;
case AVTP_AAF_FIELD_SP:
mask = MASK_SP;
shift = SHIFT_SP;
ptr = &pdu->packet_info;
break;
case AVTP_AAF_FIELD_EVT:
mask = MASK_EVT;
shift = SHIFT_EVT;
ptr = &pdu->packet_info;
break;
default:
return -EINVAL;
}
bitmap = ntohl(*ptr);
BITMAP_SET_VALUE(bitmap, val, mask, shift);
*ptr = htonl(bitmap);
return 0;
}
int avtp_aaf_pdu_set(struct avtp_stream_pdu *pdu, enum avtp_aaf_field field,
uint64_t val)
{
int res;
if (!pdu)
return -EINVAL;
switch (field) {
case AVTP_AAF_FIELD_SV:
case AVTP_AAF_FIELD_MR:
case AVTP_AAF_FIELD_TV:
case AVTP_AAF_FIELD_SEQ_NUM:
case AVTP_AAF_FIELD_TU:
case AVTP_AAF_FIELD_FORMAT:
case AVTP_AAF_FIELD_NSR:
case AVTP_AAF_FIELD_CHAN_PER_FRAME:
case AVTP_AAF_FIELD_BIT_DEPTH:
case AVTP_AAF_FIELD_STREAM_DATA_LEN:
case AVTP_AAF_FIELD_SP:
case AVTP_AAF_FIELD_EVT:
res = set_field_value(pdu, field, val);
break;
case AVTP_AAF_FIELD_TIMESTAMP:
pdu->avtp_time = htonl(val);
res = 0;
break;
case AVTP_AAF_FIELD_STREAM_ID:
pdu->stream_id = htobe64(val);
res = 0;
break;
default:
res = -EINVAL;
}
return res;
}
int avtp_aaf_pdu_init(struct avtp_stream_pdu *pdu)
{
int res;
if (!pdu)
return -EINVAL;
memset(pdu, 0, sizeof(struct avtp_stream_pdu));
res = avtp_pdu_set((struct avtp_common_pdu *) pdu, AVTP_FIELD_SUBTYPE,
AVTP_SUBTYPE_AAF);
if (res < 0)
return res;
res = avtp_aaf_pdu_set(pdu, AVTP_AAF_FIELD_SV, 1);
if (res < 0)
return res;
return 0;
};
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