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void SoxWrapper::applyAndFreeEffect(
std::vector<float>& signal,
sox_effect_t* effect) const {
sox_effects_chain_t* chain = createChain();
addInput(chain, &signal);
FL_SOX_CHECK(
sox_add_effect(chain, effect, signalInfo_.get(), signalInfo_.get()));
free(effect);
std::vector<float> augmented;
addOutput(chain, &augmented);
sox_flow_effects(chain, nullptr, nullptr);
sox_delete_effects_chain(chain);
signal.swap(augmented);
}
void SoxWrapper::addInput(
sox_effects_chain_t* chain,
std::vector<float>* signal) const {
const static sox_effect_handler_t handler{
/*name=*/"input",
/*usage=*/nullptr,
/*flags=*/SOX_EFF_MCHAN,
/*getopts=*/nullptr,
/*start=*/nullptr,
/*flow=*/nullptr,
/*drain=*/inputDrain,
/*stop=*/nullptr,
/*kill=*/nullptr,
/*priv_size=*/sizeof(SoxData)};
sox_effect_t* e = nullptr;
FL_SOX_CHECK(e = sox_create_effect(&handler));
auto input = (SoxData*)e->priv;
input->data = signal;
input->index = 0;
FL_SOX_CHECK(sox_add_effect(chain, e, signalInfo_.get(), signalInfo_.get()));
free(e);
}
void SoxWrapper::addOutput(
sox_effects_chain_t* chain,
std::vector<float>* emptyBuf) const {
const static sox_effect_handler_t handler = {
/*name=*/"output",
/*usage=*/nullptr,
/*flags=*/SOX_EFF_MCHAN,
/*getopts=*/nullptr,
/*start=*/nullptr,
/*flow=*/outputFlow,
/*drain=*/nullptr,
/*stop=*/nullptr,
/*kill=*/nullptr,
/*priv_size=*/sizeof(SoxData)};
sox_effect_t* e = nullptr;
FL_SOX_CHECK(e = sox_create_effect(&handler));
auto output = (SoxData*)e->priv;
output->data = emptyBuf;
FL_SOX_CHECK(sox_add_effect(chain, e, signalInfo_.get(), signalInfo_.get()));
free(e);
}
void SoxWrapper::addAndFreeEffect(
sox_effects_chain_t* chain,
sox_effect_t* effect) const {
FL_SOX_CHECK(
sox_add_effect(chain, effect, signalInfo_.get(), signalInfo_.get()));
free(effect);
}
sox_effects_chain_t* SoxWrapper::createChain() const {
const static sox_encodinginfo_t encoding = {
.encoding = SOX_ENCODING_FLOAT,
.bits_per_sample = 0,
.compression = HUGE_VAL, // no compression
.reverse_bytes = sox_option_no,
.reverse_nibbles = sox_option_no,
.reverse_bits = sox_option_no,
.opposite_endian = sox_false};
sox_effects_chain_t* chain = nullptr;
FL_SOX_CHECK(chain = sox_create_effects_chain(&encoding, &encoding));
return chain;
}
namespace detail {
void check(bool success, const char* msg, const char* file, int line) {
if (!success) {
std::stringstream ss;
ss << file << ':' << line << "] libsox error when executing: " << msg;
LOG(ERROR) << ss.str();
throw std::runtime_error(ss.str());
}
}
void check(int status, const char* msg, const char* file, int line) {
if (status != SOX_SUCCESS) {
std::stringstream ss;
ss << file << ':' << line << "] libsox error: " << status