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/*
* Copyright (c) 2021 Cisco and/or its affiliates.
* 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.
*/
#pragma once
#include <hicn/transport/config.h>
#include <hicn/transport/core/content_object.h>
#include <hicn/transport/errors/not_implemented_exception.h>
#include <protocols/fec/rs.h>
#if ENABLE_RELY
#include <protocols/fec/rely.h>
#endif
#include <functional>
namespace transport {
namespace protocol {
namespace fec {
#if ENABLE_RELY
#define foreach_fec_type foreach_rs_fec_type foreach_rely_fec_type
#else
#define foreach_fec_type foreach_rs_fec_type
#endif
#define ENUM_FROM_MACRO(name, k, n) name##_K##k##_N##n
#define ENUM_FROM_MACRO_STR(name, k, n) #name "_K" #k "_N" #n
enum class FECType : uint8_t {
#define _(name, k, n) ENUM_FROM_MACRO(name, k, n),
foreach_fec_type
#undef _
UNKNOWN
};
#define ENUM_FROM_MACRO2(name, k, n) FECType::ENUM_FROM_MACRO(name, k, n)
class FECUtils {
public:
static FECType fecTypeFromString(const char *fec_type) {
#define _(name, k, n) \
do { \
if (strncmp(fec_type, ENUM_FROM_MACRO_STR(name, k, n), \
strlen(ENUM_FROM_MACRO_STR(name, k, n))) == 0) { \
return ENUM_FROM_MACRO2(name, k, n); \
} \
} while (0);
foreach_fec_type
#undef _
return FECType::UNKNOWN;
}
static bool isFec(FECType fec_type, uint32_t index, uint32_t seq_offset = 0) {
switch (fec_type) {
#define _(name, k, n) \
case ENUM_FROM_MACRO2(name, k, n): \
return FecInfo<Code<k, n>>::isFec(index - (seq_offset % n));
foreach_fec_type
#undef _
default : return false;
}
}
static uint32_t nextSource(FECType fec_type, uint32_t index,
uint32_t seq_offset = 0) {
switch (fec_type) {
#define _(name, k, n) \
case ENUM_FROM_MACRO2(name, k, n): \
return FecInfo<Code<k, n>>::nextSource(index) + (seq_offset % n);
foreach_fec_type
#undef _
default : throw std::runtime_error("Unknown fec type");
}
}
static uint32_t getSourceSymbols(FECType fec_type) {
switch (fec_type) {
#define _(name, k, n) \
case ENUM_FROM_MACRO2(name, k, n): \
return k;
foreach_fec_type
#undef _
default : throw std::runtime_error("Unknown fec type");
}
}
static uint32_t getBlockSymbols(FECType fec_type) {
switch (fec_type) {
#define _(name, k, n) \
case ENUM_FROM_MACRO2(name, k, n): \
return n;
foreach_fec_type
#undef _
default : throw std::runtime_error("Unknown fec type");
}
}
static std::unique_ptr<ProducerFEC> getEncoder(FECType fec_type,
uint32_t seq_offset = 0) {
return factoryEncoder(fec_type, seq_offset);
}
static std::unique_ptr<ConsumerFEC> getDecoder(FECType fec_type,
uint32_t seq_offset = 0) {
return factoryDencoder(fec_type, seq_offset);
}
private:
static std::unique_ptr<ProducerFEC> factoryEncoder(FECType fec_type,
uint32_t seq_offset) {
switch (fec_type) {
#define _(name, k, n) \
case ENUM_FROM_MACRO2(name, k, n): \
return std::make_unique<name##Encoder>(k, n, seq_offset);
foreach_fec_type
#undef _
default : throw std::runtime_error("Unknown fec type");
}
}
static std::unique_ptr<ConsumerFEC> factoryDencoder(FECType fec_type,
uint32_t seq_offset) {
switch (fec_type) {
#define _(name, k, n) \
case ENUM_FROM_MACRO2(name, k, n): \
return std::make_unique<name##Decoder>(k, n, seq_offset);
foreach_fec_type
#undef _
default : throw std::runtime_error("Unknown fec type");
}
}
}; // namespace fec
} // namespace fec
} // namespace protocol
} // namespace transport
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