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DeepSpeech
提交 5e30f925 编写于 作者: Y YangZhou
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paddlespeech/audio/src/sox/effects.cpp 已删除 100644 → 0
浏览文件 @ c938a468
//code is from: https://github.com/pytorch/audio/blob/main/torchaudio/csrc/sox/effects.cpp
#include <sox.h>
#include <mutex>
#include "paddlespeech/audio/src/sox/effects.h"
#include "paddlespeech/audio/src/sox/effects_chain.h"
#include "paddlespeech/audio/src/sox/utils.h"
using namespace paddleaudio::sox_utils;
namespace paddleaudio::sox_effects {
namespace {
enum SoxEffectsResourceState { NotInitialized, Initialized, ShutDown };
SoxEffectsResourceState SOX_RESOURCE_STATE = NotInitialized;
std::mutex SOX_RESOUCE_STATE_MUTEX;
} // namespace
void initialize_sox_effects() {
const std::lock_guard<std::mutex> lock(SOX_RESOUCE_STATE_MUTEX);
switch (SOX_RESOURCE_STATE) {
case NotInitialized:
if (sox_init() != SOX_SUCCESS) {
throw std::runtime_error("Failed to initialize sox effects.");
};
SOX_RESOURCE_STATE = Initialized;
break;
case Initialized:
break;
case ShutDown:
throw std::runtime_error(
"SoX Effects has been shut down. Cannot initialize again.");
}
};
void shutdown_sox_effects() {
const std::lock_guard<std::mutex> lock(SOX_RESOUCE_STATE_MUTEX);
switch (SOX_RESOURCE_STATE) {
case NotInitialized:
throw std::runtime_error(
"SoX Effects is not initialized. Cannot shutdown.");
case Initialized:
if (sox_quit() != SOX_SUCCESS) {
throw std::runtime_error("Failed to initialize sox effects.");
};
SOX_RESOURCE_STATE = ShutDown;
break;
case ShutDown:
break;
}
}
auto apply_effects_tensor(
py::array waveform,
int64_t sample_rate,
const std::vector<std::vector<std::string>>& effects,
bool channels_first) -> std::tuple<py::array, int64_t> {
validate_input_tensor(waveform);
// Create SoxEffectsChain
const auto dtype = waveform.dtype();
paddleaudio::sox_effects_chain::SoxEffectsChain chain(
/*input_encoding=*/get_tensor_encodinginfo(dtype),
/*output_encoding=*/get_tensor_encodinginfo(dtype));
// Prepare output buffer
std::vector<sox_sample_t> out_buffer;
out_buffer.reserve(waveform.size());
// Build and run effects chain
chain.addInputTensor(&waveform, sample_rate, channels_first);
for (const auto& effect : effects) {
chain.addEffect(effect);
}
chain.addOutputBuffer(&out_buffer);
chain.run();
// Create tensor from buffer
auto out_tensor = convert_to_tensor(
/*buffer=*/out_buffer.data(),
/*num_samples=*/out_buffer.size(),
/*num_channels=*/chain.getOutputNumChannels(),
dtype,
/*normalize=*/false,
channels_first);
return std::tuple<py::array, int64_t>(
out_tensor, chain.getOutputSampleRate());
}
auto apply_effects_file(
const std::string& path,
const std::vector<std::vector<std::string>>& effects,
tl::optional<bool> normalize,
tl::optional<bool> channels_first,
const tl::optional<std::string>& format)
-> tl::optional<std::tuple<py::array, int64_t>> {
// Open input file
SoxFormat sf(sox_open_read(
path.c_str(),
/*signal=*/nullptr,
/*encoding=*/nullptr,
/*filetype=*/format.has_value() ? format.value().c_str() : nullptr));
if (static_cast<sox_format_t*>(sf) == nullptr ||
sf->encoding.encoding == SOX_ENCODING_UNKNOWN) {
return {};
}
const auto dtype = get_dtype(sf->encoding.encoding, sf->signal.precision);
// Prepare output
std::vector<sox_sample_t> out_buffer;
out_buffer.reserve(sf->signal.length);
// Create and run SoxEffectsChain
paddleaudio::sox_effects_chain::SoxEffectsChain chain(
/*input_encoding=*/sf->encoding,
/*output_encoding=*/get_tensor_encodinginfo(dtype));
chain.addInputFile(sf);
for (const auto& effect : effects) {
chain.addEffect(effect);
}
chain.addOutputBuffer(&out_buffer);
chain.run();
// Create tensor from buffer
bool channels_first_ = channels_first.value_or(true);
auto tensor = convert_to_tensor(
/*buffer=*/out_buffer.data(),
/*num_samples=*/out_buffer.size(),
/*num_channels=*/chain.getOutputNumChannels(),
dtype,
normalize.value_or(true),
channels_first_);
return std::tuple<py::array, int64_t>(
tensor, chain.getOutputSampleRate());
}
} // namespace paddleaudio::sox_effects
paddlespeech/audio/src/sox/effects.h 已删除 100644 → 0
浏览文件 @ c938a468
//code is from: https://github.com/pytorch/audio/blob/main/torchaudio/csrc/sox/effects.h
#pragma once
#include <pybind11/pybind11.h>
#include "paddlespeech/audio/src/sox/utils.h"
namespace py = pybind11;
namespace paddleaudio::sox_effects {
void initialize_sox_effects();
void shutdown_sox_effects();
auto apply_effects_tensor(
py::array waveform,
int64_t sample_rate,
const std::vector<std::vector<std::string>>& effects,
bool channels_first) -> std::tuple<py::array, int64_t>;
auto apply_effects_file(
const std::string& path,
const std::vector<std::vector<std::string>>& effects,
tl::optional<bool> normalize,
tl::optional<bool> channels_first,
const tl::optional<std::string>& format)
-> tl::optional<std::tuple<py::array, int64_t>>;
} // namespace torchaudio::sox_effects
paddlespeech/audio/src/sox/effects_chain.cpp 已删除 100644 → 0
浏览文件 @ c938a468
//code is from: https://github.com/pytorch/audio/blob/main/torchaudio/csrc/sox/effects_chain.cpp
#include "paddlespeech/audio/src/sox/effects_chain.h"
#include "paddlespeech/audio/src/sox/utils.h"
using namespace paddleaudio::sox_utils;
namespace paddleaudio {
namespace sox_effects_chain {
namespace {
/// helper classes for passing the location of input tensor and output buffer
///
/// drain/flow callback functions require plaing C style function signature and
/// the way to pass extra data is to attach data to sox_effect_t::priv pointer.
/// The following structs will be assigned to sox_effect_t::priv pointer which
/// gives sox_effect_t an access to input Tensor and output buffer object.
struct TensorInputPriv {
size_t index;
py::array* waveform;
int64_t sample_rate;
bool channels_first;
};
struct TensorOutputPriv {
std::vector<sox_sample_t>* buffer;
};
struct FileOutputPriv {
sox_format_t* sf;
};
/// Callback function to feed Tensor data to SoxEffectChain.
int tensor_input_drain(sox_effect_t* effp, sox_sample_t* obuf, size_t* osamp) {
// Retrieve the input Tensor and current index
auto priv = static_cast<TensorInputPriv*>(effp->priv);
auto index = priv->index;
auto tensor = *(priv->waveform);
auto num_channels = effp->out_signal.channels;
// Adjust the number of samples to read
const size_t num_samples = tensor.size();
if (index + *osamp > num_samples) {
*osamp = num_samples - index;
}
// Ensure that it's a multiple of the number of channels
*osamp -= *osamp % num_channels;
// Slice the input Tensor
// refacor this module, chunk
auto i_frame = index / num_channels;
auto num_frames = *osamp / num_channels;
py::array chunk(tensor.dtype(), {num_frames*num_channels});
py::buffer_info ori_info = tensor.request();
py::buffer_info info = chunk.request();
char* ori_start_ptr = (char*)ori_info.ptr + index * chunk.itemsize() / sizeof(char);
std::memcpy(info.ptr, ori_start_ptr, chunk.nbytes());
py::dtype chunk_type = py::dtype("i"); // dtype int32
py::array new_chunk = py::array(chunk_type, chunk.shape());
py::buffer_info new_info = new_chunk.request();
void* ptr = (void*) info.ptr;
int* new_ptr = (int*) new_info.ptr;
// Convert to sox_sample_t (int32_t)
switch (chunk.dtype().num()) {
//case c10::ScalarType::Float: {
case 11: {
// Need to convert to 64-bit precision so that
// values around INT32_MIN/MAX are handled correctly.
float* ptr_f = (float*)ptr;
for (int idx = 0; idx < chunk.size(); ++idx) {
double elem = *ptr_f * 2147483648.;
// *new_ptr = std::clamp(elem, INT32_MIN, INT32_MAX);
if (elem > INT32_MAX) {
*new_ptr = INT32_MAX;
} else if (elem < INT32_MIN) {
*new_ptr = INT32_MIN;
} else { *new_ptr = elem; }
}
break;
}
//case c10::ScalarType::Int: {
case 5: {
break;
}
// case short
case 3: {
int16_t* ptr_s = (int16_t*) ptr;
for (int idx = 0; idx < chunk.size(); ++idx) {
*new_ptr = *ptr_s * 65536;
}
break;
}
// case byte
case 1: {
int8_t* ptr_b = (int8_t*) ptr;
for (int idx = 0; idx < chunk.size(); ++idx) {
*new_ptr = (*ptr_b - 128) * 16777216;
}
break;
}
default:
throw std::runtime_error("Unexpected dtype.");
}
// Write to buffer
memcpy(obuf, (int*)new_info.ptr, *osamp * 4);
priv->index += *osamp;
return (priv->index == num_samples) ? SOX_EOF : SOX_SUCCESS;
}
/// Callback function to fetch data from SoxEffectChain.
int tensor_output_flow(
sox_effect_t* effp,
sox_sample_t const* ibuf,
sox_sample_t* obuf LSX_UNUSED,
size_t* isamp,
size_t* osamp) {
*osamp = 0;
// Get output buffer
auto out_buffer = static_cast<TensorOutputPriv*>(effp->priv)->buffer;
// Append at the end
out_buffer->insert(out_buffer->end(), ibuf, ibuf + *isamp);
return SOX_SUCCESS;
}
int file_output_flow(
sox_effect_t* effp,
sox_sample_t const* ibuf,
sox_sample_t* obuf LSX_UNUSED,
size_t* isamp,
size_t* osamp) {
*osamp = 0;
if (*isamp) {
auto sf = static_cast<FileOutputPriv*>(effp->priv)->sf;
if (sox_write(sf, ibuf, *isamp) != *isamp) {
if (sf->sox_errno) {
std::ostringstream stream;
stream << sf->sox_errstr << " " << sox_strerror(sf->sox_errno) << " "
<< sf->filename;
throw std::runtime_error(stream.str());
}
return SOX_EOF;
}
}
return SOX_SUCCESS;
}
sox_effect_handler_t* get_tensor_input_handler() {
static sox_effect_handler_t handler{
/*name=*/"input_tensor",
/*usage=*/NULL,
/*flags=*/SOX_EFF_MCHAN,
/*getopts=*/NULL,
/*start=*/NULL,
/*flow=*/NULL,
/*drain=*/tensor_input_drain,
/*stop=*/NULL,
/*kill=*/NULL,
/*priv_size=*/sizeof(TensorInputPriv)};
return &handler;
}
sox_effect_handler_t* get_tensor_output_handler() {
static sox_effect_handler_t handler{
/*name=*/"output_tensor",
/*usage=*/NULL,
/*flags=*/SOX_EFF_MCHAN,
/*getopts=*/NULL,
/*start=*/NULL,
/*flow=*/tensor_output_flow,
/*drain=*/NULL,
/*stop=*/NULL,
/*kill=*/NULL,
/*priv_size=*/sizeof(TensorOutputPriv)};
return &handler;
}
sox_effect_handler_t* get_file_output_handler() {
static sox_effect_handler_t handler{
/*name=*/"output_file",
/*usage=*/NULL,
/*flags=*/SOX_EFF_MCHAN,
/*getopts=*/NULL,
/*start=*/NULL,
/*flow=*/file_output_flow,
/*drain=*/NULL,
/*stop=*/NULL,
/*kill=*/NULL,
/*priv_size=*/sizeof(FileOutputPriv)};
return &handler;
}
} // namespace
SoxEffect::SoxEffect(sox_effect_t* se) noexcept : se_(se) {}
SoxEffect::~SoxEffect() {
if (se_ != nullptr) {
free(se_);
}
}
SoxEffect::operator sox_effect_t*() const {
return se_;
}
auto SoxEffect::operator->() noexcept -> sox_effect_t* {
return se_;
}
SoxEffectsChain::SoxEffectsChain(
sox_encodinginfo_t input_encoding,
sox_encodinginfo_t output_encoding)
: in_enc_(input_encoding),
out_enc_(output_encoding),
in_sig_(),
interm_sig_(),
out_sig_(),
sec_(sox_create_effects_chain(&in_enc_, &out_enc_)) {
if (!sec_) {
throw std::runtime_error("Failed to create effect chain.");
}
}
SoxEffectsChain::~SoxEffectsChain() {
if (sec_ != nullptr) {
sox_delete_effects_chain(sec_);
}
}
void SoxEffectsChain::run() {
sox_flow_effects(sec_, NULL, NULL);
}
void SoxEffectsChain::addInputTensor(
py::array* waveform,
int64_t sample_rate,
bool channels_first) {
in_sig_ = get_signalinfo(waveform, sample_rate, "wav", channels_first);
interm_sig_ = in_sig_;
SoxEffect e(sox_create_effect(get_tensor_input_handler()));
auto priv = static_cast<TensorInputPriv*>(e->priv);
priv->index = 0;
priv->waveform = waveform;
priv->sample_rate = sample_rate;
priv->channels_first = channels_first;
if (sox_add_effect(sec_, e, &interm_sig_, &in_sig_) != SOX_SUCCESS) {
throw std::runtime_error(
"Internal Error: Failed to add effect: input_tensor");
}
}
void SoxEffectsChain::addOutputBuffer(
std::vector<sox_sample_t>* output_buffer) {
SoxEffect e(sox_create_effect(get_tensor_output_handler()));
static_cast<TensorOutputPriv*>(e->priv)->buffer = output_buffer;
if (sox_add_effect(sec_, e, &interm_sig_, &in_sig_) != SOX_SUCCESS) {
throw std::runtime_error(
"Internal Error: Failed to add effect: output_tensor");
}
}
void SoxEffectsChain::addInputFile(sox_format_t* sf) {
in_sig_ = sf->signal;
interm_sig_ = in_sig_;
SoxEffect e(sox_create_effect(sox_find_effect("input")));
char* opts[] = {(char*)sf};
sox_effect_options(e, 1, opts);
if (sox_add_effect(sec_, e, &interm_sig_, &in_sig_) != SOX_SUCCESS) {
std::ostringstream stream;
stream << "Internal Error: Failed to add effect: input " << sf->filename;
throw std::runtime_error(stream.str());
}
}
void SoxEffectsChain::addOutputFile(sox_format_t* sf) {
out_sig_ = sf->signal;
SoxEffect e(sox_create_effect(get_file_output_handler()));
static_cast<FileOutputPriv*>(e->priv)->sf = sf;
if (sox_add_effect(sec_, e, &interm_sig_, &out_sig_) != SOX_SUCCESS) {
std::ostringstream stream;
stream << "Internal Error: Failed to add effect: output " << sf->filename;
throw std::runtime_error(stream.str());
}
}
void SoxEffectsChain::addEffect(const std::vector<std::string> effect) {
const auto num_args = effect.size();
if (num_args == 0) {
throw std::runtime_error("Invalid argument: empty effect.");
}
const auto name = effect[0];
if (UNSUPPORTED_EFFECTS.find(name) != UNSUPPORTED_EFFECTS.end()) {
std::ostringstream stream;
stream << "Unsupported effect: " << name;
throw std::runtime_error(stream.str());
}
auto returned_effect = sox_find_effect(name.c_str());
if (!returned_effect) {
std::ostringstream stream;
stream << "Unsupported effect: " << name;
throw std::runtime_error(stream.str());
}
SoxEffect e(sox_create_effect(returned_effect));
const auto num_options = num_args - 1;
std::vector<char*> opts;
for (size_t i = 1; i < num_args; ++i) {
opts.push_back((char*)effect[i].c_str());
}
if (sox_effect_options(e, num_options, num_options ? opts.data() : nullptr) !=
SOX_SUCCESS) {
std::ostringstream stream;
stream << "Invalid effect option:";
for (const auto& v : effect) {
stream << " " << v;
}
throw std::runtime_error(stream.str());
}
if (sox_add_effect(sec_, e, &interm_sig_, &in_sig_) != SOX_SUCCESS) {
std::ostringstream stream;
stream << "Internal Error: Failed to add effect: \"" << name;
for (size_t i = 1; i < num_args; ++i) {
stream << " " << effect[i];
}
stream << "\"";
throw std::runtime_error(stream.str());
}
}
int64_t SoxEffectsChain::getOutputNumChannels() {
return interm_sig_.channels;
}
int64_t SoxEffectsChain::getOutputSampleRate() {
return interm_sig_.rate;
}
} // namespace sox_effects_chain
} // namespace paddleaudio
paddlespeech/audio/src/sox/effects_chain.h 已删除 100644 → 0
浏览文件 @ c938a468
//code is from: https://github.com/pytorch/audio/blob/main/torchaudio/csrc/sox/effects_chain.h
#pragma once
#include <sox.h>
#include "paddlespeech/audio/src/sox/utils.h"
namespace paddleaudio {
namespace sox_effects_chain {
// Helper struct to safely close sox_effect_t* pointer returned by
// sox_create_effect
struct SoxEffect {
explicit SoxEffect(sox_effect_t* se) noexcept;
SoxEffect(const SoxEffect& other) = delete;
SoxEffect(const SoxEffect&& other) = delete;
auto operator=(const SoxEffect& other) -> SoxEffect& = delete;
auto operator=(SoxEffect&& other) -> SoxEffect& = delete;
~SoxEffect();
operator sox_effect_t*() const;
auto operator->() noexcept -> sox_effect_t*;
private:
sox_effect_t* se_;
};
// Helper struct to safely close sox_effects_chain_t with handy methods
class SoxEffectsChain {
const sox_encodinginfo_t in_enc_;
const sox_encodinginfo_t out_enc_;
protected:
sox_signalinfo_t in_sig_;
sox_signalinfo_t interm_sig_;
sox_signalinfo_t out_sig_;
sox_effects_chain_t* sec_;
public:
explicit SoxEffectsChain(
sox_encodinginfo_t input_encoding,
sox_encodinginfo_t output_encoding);
SoxEffectsChain(const SoxEffectsChain& other) = delete;
SoxEffectsChain(const SoxEffectsChain&& other) = delete;
SoxEffectsChain& operator=(const SoxEffectsChain& other) = delete;
SoxEffectsChain& operator=(SoxEffectsChain&& other) = delete;
~SoxEffectsChain();
void run();
void addInputTensor(
py::array* waveform,
int64_t sample_rate,
bool channels_first);
void addInputFile(sox_format_t* sf);
void addOutputBuffer(std::vector<sox_sample_t>* output_buffer);
void addOutputFile(sox_format_t* sf);
void addEffect(const std::vector<std::string> effect);
int64_t getOutputNumChannels();
int64_t getOutputSampleRate();
};
} // namespace sox_effects_chain
} // namespace torchaudio
paddlespeech/audio/src/sox/io.cpp 已删除 100644 → 0
浏览文件 @ c938a468
//code is from: https://github.com/pytorch/audio/blob/main/torchaudio/csrc/sox/io.cpp
#include "paddlespeech/audio/src/sox/effects.h"
#include "paddlespeech/audio/src/sox/effects_chain.h"
#include "paddlespeech/audio/src/sox/io.h"
#include "paddlespeech/audio/src/sox/types.h"
#include "paddlespeech/audio/src/sox/utils.h"
using namespace paddleaudio::sox_utils;
namespace paddleaudio {
namespace sox_io {
tl::optional<MetaDataTuple> get_info_file(
const std::string& path, const tl::optional<std::string>& format) {
SoxFormat sf(sox_open_read(
path.c_str(),
/*signal=*/nullptr,
/*encoding=*/nullptr,
/*filetype=*/format.has_value() ? format.value().c_str() : nullptr));
if (static_cast<sox_format_t*>(sf) == nullptr ||
sf->encoding.encoding == SOX_ENCODING_UNKNOWN) {
return {};
}
return std::forward_as_tuple(
static_cast<int64_t>(sf->signal.rate),
static_cast<int64_t>(sf->signal.length / sf->signal.channels),
static_cast<int64_t>(sf->signal.channels),
static_cast<int64_t>(sf->encoding.bits_per_sample),
get_encoding(sf->encoding.encoding));
}
std::vector<std::vector<std::string>> get_effects(
const tl::optional<int64_t>& frame_offset,
const tl::optional<int64_t>& num_frames) {
const auto offset = frame_offset.value_or(0);
if (offset < 0) {
throw std::runtime_error(
"Invalid argument: frame_offset must be non-negative.");
}
const auto frames = num_frames.value_or(-1);
if (frames == 0 || frames < -1) {
throw std::runtime_error(
"Invalid argument: num_frames must be -1 or greater than 0.");
}
std::vector<std::vector<std::string>> effects;
if (frames != -1) {
std::ostringstream os_offset, os_frames;
os_offset << offset << "s";
os_frames << "+" << frames << "s";
effects.emplace_back(
std::vector<std::string>{"trim", os_offset.str(), os_frames.str()});
} else if (offset != 0) {
std::ostringstream os_offset;
os_offset << offset << "s";
effects.emplace_back(std::vector<std::string>{"trim", os_offset.str()});
}
return effects;
}
tl::optional<std::tuple<py::array, int64_t>> load_audio_file(
const std::string& path,
const tl::optional<int64_t>& frame_offset,
const tl::optional<int64_t>& num_frames,
tl::optional<bool> normalize,
tl::optional<bool> channels_first,
const tl::optional<std::string>& format) {
auto effects = get_effects(frame_offset, num_frames);
return paddleaudio::sox_effects::apply_effects_file(
path, effects, normalize, channels_first, format);
}
void save_audio_file(const std::string& path,
py::array tensor,
int64_t sample_rate,
bool channels_first,
tl::optional<double> compression,
tl::optional<std::string> format,
tl::optional<std::string> encoding,
tl::optional<int64_t> bits_per_sample) {
validate_input_tensor(tensor);
const auto filetype = [&]() {
if (format.has_value()) return format.value();
return get_filetype(path);
}();
if (filetype == "amr-nb") {
const auto num_channels = tensor.shape(channels_first ? 0 : 1);
//TORCH_CHECK(num_channels == 1,
// "amr-nb format only supports single channel audio.");
} else if (filetype == "htk") {
const auto num_channels = tensor.shape(channels_first ? 0 : 1);
// TORCH_CHECK(num_channels == 1,
// "htk format only supports single channel audio.");
} else if (filetype == "gsm") {
const auto num_channels = tensor.shape(channels_first ? 0 : 1);
//TORCH_CHECK(num_channels == 1,
// "gsm format only supports single channel audio.");
//TORCH_CHECK(sample_rate == 8000,
// "gsm format only supports a sampling rate of 8kHz.");
}
const auto signal_info =
get_signalinfo(&tensor, sample_rate, filetype, channels_first);
const auto encoding_info = get_encodinginfo_for_save(
filetype, tensor.dtype(), compression, encoding, bits_per_sample);
SoxFormat sf(sox_open_write(path.c_str(),
&signal_info,
&encoding_info,
/*filetype=*/filetype.c_str(),
/*oob=*/nullptr,
/*overwrite_permitted=*/nullptr));
if (static_cast<sox_format_t*>(sf) == nullptr) {
throw std::runtime_error(
"Error saving audio file: failed to open file " + path);
}
paddleaudio::sox_effects_chain::SoxEffectsChain chain(
/*input_encoding=*/get_tensor_encodinginfo(tensor.dtype()),
/*output_encoding=*/sf->encoding);
chain.addInputTensor(&tensor, sample_rate, channels_first);
chain.addOutputFile(sf);
chain.run();
}
} // namespace sox_io
} // namespace paddleaudio
\ No newline at end of file
paddlespeech/audio/src/sox/io.h 已删除 100644 → 0
浏览文件 @ c938a468
// Copyright (c) 2017 Facebook Inc. (Soumith Chintala),
// All rights reserved.
#pragma once
#include "paddlespeech/audio/src/optional/optional.hpp"
#include "paddlespeech/audio/src/sox/utils.h"
namespace paddleaudio {
namespace sox_io {
auto get_effects(const tl::optional<int64_t>& frame_offset,
const tl::optional<int64_t>& num_frames)
-> std::vector<std::vector<std::string>>;
using MetaDataTuple =
std::tuple<int64_t, int64_t, int64_t, int64_t, std::string>;
tl::optional<MetaDataTuple> get_info_file(
const std::string& path, const tl::optional<std::string>& format);
tl::optional<std::tuple<py::array, int64_t>> load_audio_file(
const std::string& path,
const tl::optional<int64_t>& frame_offset,
const tl::optional<int64_t>& num_frames,
tl::optional<bool> normalize,
tl::optional<bool> channels_first,
const tl::optional<std::string>& format);
void save_audio_file(const std::string& path,
py::array tensor,
int64_t sample_rate,
bool channels_first,
tl::optional<double> compression,
tl::optional<std::string> format,
tl::optional<std::string> encoding,
tl::optional<int64_t> bits_per_sample);
} // namespace sox_io
} // namespace paddleaudio
paddlespeech/audio/src/sox/types.cpp 已删除 100644 → 0
浏览文件 @ c938a468
//code is from: https://github.com/pytorch/audio/blob/main/torchaudio/csrc/sox/types.cpp
#include "paddlespeech/audio/src/sox/types.h"
#include <ostream>
#include <sstream>
namespace paddleaudio {
namespace sox_utils {
Format get_format_from_string(const std::string& format) {
if (format == "wav")
return Format::WAV;
if (format == "mp3")
return Format::MP3;
if (format == "flac")
return Format::FLAC;
if (format == "ogg" || format == "vorbis")
return Format::VORBIS;
if (format == "amr-nb")
return Format::AMR_NB;
if (format == "amr-wb")
return Format::AMR_WB;
if (format == "amb")
return Format::AMB;
if (format == "sph")
return Format::SPHERE;
if (format == "htk")
return Format::HTK;
if (format == "gsm")
return Format::GSM;
std::ostringstream stream;
stream << "Internal Error: unexpected format value: " << format;
throw std::runtime_error(stream.str());
}
std::string to_string(Encoding v) {
switch (v) {
case Encoding::UNKNOWN:
return "UNKNOWN";
case Encoding::PCM_SIGNED:
return "PCM_S";
case Encoding::PCM_UNSIGNED:
return "PCM_U";
case Encoding::PCM_FLOAT:
return "PCM_F";
case Encoding::FLAC:
return "FLAC";
case Encoding::ULAW:
return "ULAW";
case Encoding::ALAW:
return "ALAW";
case Encoding::MP3:
return "MP3";
case Encoding::VORBIS:
return "VORBIS";
case Encoding::AMR_WB:
return "AMR_WB";
case Encoding::AMR_NB:
return "AMR_NB";
case Encoding::OPUS:
return "OPUS";
default:
throw std::runtime_error("Internal Error: unexpected encoding.");
}
}
Encoding get_encoding_from_option(const tl::optional<std::string> encoding) {
if (!encoding.has_value())
return Encoding::NOT_PROVIDED;
std::string v = encoding.value();
if (v == "PCM_S")
return Encoding::PCM_SIGNED;
if (v == "PCM_U")
return Encoding::PCM_UNSIGNED;
if (v == "PCM_F")
return Encoding::PCM_FLOAT;
if (v == "ULAW")
return Encoding::ULAW;
if (v == "ALAW")
return Encoding::ALAW;
std::ostringstream stream;
stream << "Internal Error: unexpected encoding value: " << v;
throw std::runtime_error(stream.str());
}
BitDepth get_bit_depth_from_option(const tl::optional<int64_t> bit_depth) {
if (!bit_depth.has_value())
return BitDepth::NOT_PROVIDED;
int64_t v = bit_depth.value();
switch (v) {
case 8:
return BitDepth::B8;
case 16:
return BitDepth::B16;
case 24:
return BitDepth::B24;
case 32:
return BitDepth::B32;
case 64:
return BitDepth::B64;
default: {
std::ostringstream s;
s << "Internal Error: unexpected bit depth value: " << v;
throw std::runtime_error(s.str());
}
}
}
std::string get_encoding(sox_encoding_t encoding) {
switch (encoding) {
case SOX_ENCODING_UNKNOWN:
return "UNKNOWN";
case SOX_ENCODING_SIGN2:
return "PCM_S";
case SOX_ENCODING_UNSIGNED:
return "PCM_U";
case SOX_ENCODING_FLOAT:
return "PCM_F";
case SOX_ENCODING_FLAC:
return "FLAC";
case SOX_ENCODING_ULAW:
return "ULAW";
case SOX_ENCODING_ALAW:
return "ALAW";
case SOX_ENCODING_MP3:
return "MP3";
case SOX_ENCODING_VORBIS:
return "VORBIS";
case SOX_ENCODING_AMR_WB:
return "AMR_WB";
case SOX_ENCODING_AMR_NB:
return "AMR_NB";
case SOX_ENCODING_OPUS:
return "OPUS";
case SOX_ENCODING_GSM:
return "GSM";
default:
return "UNKNOWN";
}
}
} // namespace sox_utils
} // namespace paddleaudio
paddlespeech/audio/src/sox/types.h 已删除 100644 → 0
浏览文件 @ c938a468
//code is from: https://github.com/pytorch/audio/blob/main/torchaudio/csrc/sox/types.h
#pragma once
#include <sox.h>
#include "paddlespeech/audio/src/optional/optional.hpp"
namespace paddleaudio {
namespace sox_utils {
enum class Format {
WAV,
MP3,
FLAC,
VORBIS,
AMR_NB,
AMR_WB,
AMB,
SPHERE,
GSM,
HTK,
};
Format get_format_from_string(const std::string& format);
enum class Encoding {
NOT_PROVIDED,
UNKNOWN,
PCM_SIGNED,
PCM_UNSIGNED,
PCM_FLOAT,
FLAC,
ULAW,
ALAW,
MP3,
VORBIS,
AMR_WB,
AMR_NB,
OPUS,
};
std::string to_string(Encoding v);
Encoding get_encoding_from_option(const tl::optional<std::string> encoding);
enum class BitDepth : unsigned {
NOT_PROVIDED = 0,
B8 = 8,
B16 = 16,
B24 = 24,
B32 = 32,
B64 = 64,
};
BitDepth get_bit_depth_from_option(const tl::optional<int64_t> bit_depth);
std::string get_encoding(sox_encoding_t encoding);
} // namespace sox_utils
} // namespace torchaudio
\ No newline at end of file
paddlespeech/audio/src/sox/utils.cpp 已删除 100644 → 0
浏览文件 @ c938a468
//code is from: https://github.com/pytorch/audio/blob/main/torchaudio/csrc/sox/utils.cpp
#include <sox.h>
#include "paddlespeech/audio/src/sox/types.h"
#include "paddlespeech/audio/src/sox/utils.h"
namespace paddleaudio {
namespace sox_utils {
void set_seed(const int64_t seed) {
sox_get_globals()->ranqd1 = static_cast<sox_int32_t>(seed);
}
void set_verbosity(const int64_t verbosity) {
sox_get_globals()->verbosity = static_cast<unsigned>(verbosity);
}
void set_use_threads(const bool use_threads) {
sox_get_globals()->use_threads = static_cast<sox_bool>(use_threads);
}
void set_buffer_size(const int64_t buffer_size) {
sox_get_globals()->bufsiz = static_cast<size_t>(buffer_size);
}
int64_t get_buffer_size() {
return sox_get_globals()->bufsiz;
}
std::vector<std::vector<std::string>> list_effects() {
std::vector<std::vector<std::string>> effects;
for (const sox_effect_fn_t* fns = sox_get_effect_fns(); *fns; ++fns) {
const sox_effect_handler_t* handler = (*fns)();
if (handler && handler->name) {
if (UNSUPPORTED_EFFECTS.find(handler->name) ==
UNSUPPORTED_EFFECTS.end()) {
effects.emplace_back(std::vector<std::string>{
handler->name,
handler->usage ? std::string(handler->usage) : std::string("")});
}
}
}
return effects;
}
std::vector<std::string> list_write_formats() {
std::vector<std::string> formats;
for (const sox_format_tab_t* fns = sox_get_format_fns(); fns->fn; ++fns) {
const sox_format_handler_t* handler = fns->fn();
for (const char* const* names = handler->names; *names; ++names) {
if (!strchr(*names, '/') && handler->write)
formats.emplace_back(*names);
}
}
return formats;
}
std::vector<std::string> list_read_formats() {
std::vector<std::string> formats;
for (const sox_format_tab_t* fns = sox_get_format_fns(); fns->fn; ++fns) {
const sox_format_handler_t* handler = fns->fn();
for (const char* const* names = handler->names; *names; ++names) {
if (!strchr(*names, '/') && handler->read)
formats.emplace_back(*names);
}
}
return formats;
}
SoxFormat::SoxFormat(sox_format_t* fd) noexcept : fd_(fd) {}
SoxFormat::~SoxFormat() {
close();
}
sox_format_t* SoxFormat::operator->() const noexcept {
return fd_;
}
SoxFormat::operator sox_format_t*() const noexcept {
return fd_;
}
void SoxFormat::close() {
if (fd_ != nullptr) {
sox_close(fd_);
fd_ = nullptr;
}
}
void validate_input_file(const SoxFormat& sf, const std::string& path) {
if (static_cast<sox_format_t*>(sf) == nullptr) {
throw std::runtime_error(
"Error loading audio file: failed to open file " + path);
}
if (sf->encoding.encoding == SOX_ENCODING_UNKNOWN) {
throw std::runtime_error("Error loading audio file: unknown encoding.");
}
}
void validate_input_memfile(const SoxFormat &sf) {
return validate_input_file(sf, "<in memory buffer>");
}
void validate_input_tensor(const py::array tensor) {
if (tensor.ndim() != 2) {
throw std::runtime_error("Input tensor has to be 2D.");
}
char dtype = tensor.dtype().char_();
bool flag = (dtype == 'f') || (dtype == 'd') || (dtype == 'l') || (dtype == 'i');
if (flag == false) {
throw std::runtime_error(
"Input tensor has to be one of float32, int32, int16 or uint8 type.");
}
}
py::dtype get_dtype(
const sox_encoding_t encoding,
const unsigned precision) {
switch (encoding) {
case SOX_ENCODING_UNSIGNED: // 8-bit PCM WAV
return py::dtype('u1');
case SOX_ENCODING_SIGN2: // 16-bit, 24-bit, or 32-bit PCM WAV
switch (precision) {
case 16:
return py::dtype("i2");
case 24: // Cast 24-bit to 32-bit.
case 32:
return py::dtype('i');
default:
throw std::runtime_error(
"Only 16, 24, and 32 bits are supported for signed PCM.");
}
default:
// default to float32 for the other formats, including
// 32-bit flaoting-point WAV,
// MP3,
// FLAC,
// VORBIS etc...
return py::dtype("f");
}
}
py::array convert_to_tensor(
sox_sample_t* buffer,
const int32_t num_samples,
const int32_t num_channels,
const py::dtype dtype,
const bool normalize,
const bool channels_first) {
py::array t;
uint64_t dummy = 0;
SOX_SAMPLE_LOCALS;
if (normalize || dtype.char_() == 'f') {
t = py::array(dtype, {num_samples / num_channels, num_channels});
auto ptr = (float*)t.mutable_data(0, 0);
for (int32_t i = 0; i < num_samples; ++i) {
ptr[i] = SOX_SAMPLE_TO_FLOAT_32BIT(buffer[i], dummy);
}
} else if (dtype.char_() == 'i') {
//t = torch::from_blob(
// buffer, {num_samples / num_channels, num_channels}, torch::kInt32)
// .clone();
t = py::array(dtype, {num_samples / num_channels, num_channels});
auto ptr = (int*)t.mutable_data(0, 0);
for (int32_t i = 0; i < num_samples; ++i) {
ptr[i] = buffer[i];
}
} else if (dtype.char_() == 'h') { // int16
t = py::array(dtype, {num_samples / num_channels, num_channels});
auto ptr = (int16_t*)t.mutable_data(0, 0);
for (int32_t i = 0; i < num_samples; ++i) {
ptr[i] = SOX_SAMPLE_TO_SIGNED_16BIT(buffer[i], dummy);
}
} else if (dtype.char_() == 'b') {
//t = torch::empty({num_samples / num_channels, num_channels}, torch::kUInt8);
auto ptr = (uint8_t*)t.mutable_data(0,0);
for (int32_t i = 0; i < num_samples; ++i) {
ptr[i] = SOX_SAMPLE_TO_UNSIGNED_8BIT(buffer[i], dummy);
}
} else {
throw std::runtime_error("Unsupported dtype.");
}
return t;
}
const std::string get_filetype(const std::string path) {
std::string ext = path.substr(path.find_last_of(".") + 1);
std::transform(ext.begin(), ext.end(), ext.begin(), ::tolower);
return ext;
}
namespace {
std::tuple<sox_encoding_t, unsigned> get_save_encoding_for_wav(
const std::string format,
py::dtype dtype,
const Encoding& encoding,
const BitDepth& bits_per_sample) {
switch (encoding) {
case Encoding::NOT_PROVIDED:
switch (bits_per_sample) {
case BitDepth::NOT_PROVIDED:
switch (dtype.num()) {
case 11: // float32 numpy dtype num
return std::make_tuple<>(SOX_ENCODING_FLOAT, 32);
case 5: // int numpy dtype num
return std::make_tuple<>(SOX_ENCODING_SIGN2, 32);
case 3: // int16 numpy
return std::make_tuple<>(SOX_ENCODING_SIGN2, 16);
case 1: // byte numpy
return std::make_tuple<>(SOX_ENCODING_UNSIGNED, 8);
default:
throw std::runtime_error("Internal Error: Unexpected dtype.");
}
case BitDepth::B8:
return std::make_tuple<>(SOX_ENCODING_UNSIGNED, 8);
default:
return std::make_tuple<>(
SOX_ENCODING_SIGN2, static_cast<unsigned>(bits_per_sample));
}
case Encoding::PCM_SIGNED:
switch (bits_per_sample) {
case BitDepth::NOT_PROVIDED:
return std::make_tuple<>(SOX_ENCODING_SIGN2, 32);
case BitDepth::B8:
throw std::runtime_error(
format + " does not support 8-bit signed PCM encoding.");
default:
return std::make_tuple<>(
SOX_ENCODING_SIGN2, static_cast<unsigned>(bits_per_sample));
}
case Encoding::PCM_UNSIGNED:
switch (bits_per_sample) {
case BitDepth::NOT_PROVIDED:
case BitDepth::B8:
return std::make_tuple<>(SOX_ENCODING_UNSIGNED, 8);
default:
throw std::runtime_error(
format + " only supports 8-bit for unsigned PCM encoding.");
}
case Encoding::PCM_FLOAT:
switch (bits_per_sample) {
case BitDepth::NOT_PROVIDED:
case BitDepth::B32:
return std::make_tuple<>(SOX_ENCODING_FLOAT, 32);
case BitDepth::B64:
return std::make_tuple<>(SOX_ENCODING_FLOAT, 64);
default:
throw std::runtime_error(
format +
" only supports 32-bit or 64-bit for floating-point PCM encoding.");
}
case Encoding::ULAW:
switch (bits_per_sample) {
case BitDepth::NOT_PROVIDED:
case BitDepth::B8:
return std::make_tuple<>(SOX_ENCODING_ULAW, 8);
default:
throw std::runtime_error(
format + " only supports 8-bit for mu-law encoding.");
}
case Encoding::ALAW:
switch (bits_per_sample) {
case BitDepth::NOT_PROVIDED:
case BitDepth::B8:
return std::make_tuple<>(SOX_ENCODING_ALAW, 8);
default:
throw std::runtime_error(
format + " only supports 8-bit for a-law encoding.");
}
default:
throw std::runtime_error(
format + " does not support encoding: " + to_string(encoding));
}
}
std::tuple<sox_encoding_t, unsigned> get_save_encoding(
const std::string& format,
const py::dtype dtype,
const tl::optional<std::string> encoding,
const tl::optional<int64_t> bits_per_sample) {
const Format fmt = get_format_from_string(format);
const Encoding enc = get_encoding_from_option(encoding);
const BitDepth bps = get_bit_depth_from_option(bits_per_sample);
switch (fmt) {
case Format::WAV:
case Format::AMB:
return get_save_encoding_for_wav(format, dtype, enc, bps);
case Format::MP3:
if (enc != Encoding::NOT_PROVIDED)
throw std::runtime_error("mp3 does not support `encoding` option.");
if (bps != BitDepth::NOT_PROVIDED)
throw std::runtime_error(
"mp3 does not support `bits_per_sample` option.");
return std::make_tuple<>(SOX_ENCODING_MP3, 16);
case Format::HTK:
if (enc != Encoding::NOT_PROVIDED)
throw std::runtime_error("htk does not support `encoding` option.");
if (bps != BitDepth::NOT_PROVIDED)
throw std::runtime_error(
"htk does not support `bits_per_sample` option.");
return std::make_tuple<>(SOX_ENCODING_SIGN2, 16);
case Format::VORBIS:
if (enc != Encoding::NOT_PROVIDED)
throw std::runtime_error("vorbis does not support `encoding` option.");
if (bps != BitDepth::NOT_PROVIDED)
throw std::runtime_error(
"vorbis does not support `bits_per_sample` option.");
return std::make_tuple<>(SOX_ENCODING_VORBIS, 16);
case Format::AMR_NB:
if (enc != Encoding::NOT_PROVIDED)
throw std::runtime_error("amr-nb does not support `encoding` option.");
if (bps != BitDepth::NOT_PROVIDED)
throw std::runtime_error(
"amr-nb does not support `bits_per_sample` option.");
return std::make_tuple<>(SOX_ENCODING_AMR_NB, 16);
case Format::FLAC:
if (enc != Encoding::NOT_PROVIDED)
throw std::runtime_error("flac does not support `encoding` option.");
switch (bps) {
case BitDepth::B32:
case BitDepth::B64:
throw std::runtime_error(
"flac does not support `bits_per_sample` larger than 24.");
default:
return std::make_tuple<>(
SOX_ENCODING_FLAC, static_cast<unsigned>(bps));
}
case Format::SPHERE:
switch (enc) {
case Encoding::NOT_PROVIDED:
case Encoding::PCM_SIGNED:
switch (bps) {
case BitDepth::NOT_PROVIDED:
return std::make_tuple<>(SOX_ENCODING_SIGN2, 32);
default:
return std::make_tuple<>(
SOX_ENCODING_SIGN2, static_cast<unsigned>(bps));
}
case Encoding::PCM_UNSIGNED:
throw std::runtime_error(
"sph does not support unsigned integer PCM.");
case Encoding::PCM_FLOAT:
throw std::runtime_error("sph does not support floating point PCM.");
case Encoding::ULAW:
switch (bps) {
case BitDepth::NOT_PROVIDED:
case BitDepth::B8:
return std::make_tuple<>(SOX_ENCODING_ULAW, 8);
default:
throw std::runtime_error(
"sph only supports 8-bit for mu-law encoding.");
}
case Encoding::ALAW:
switch (bps) {
case BitDepth::NOT_PROVIDED:
case BitDepth::B8:
return std::make_tuple<>(SOX_ENCODING_ALAW, 8);
default:
return std::make_tuple<>(
SOX_ENCODING_ALAW, static_cast<unsigned>(bps));
}
default:
throw std::runtime_error(
"sph does not support encoding: " + encoding.value());
}
case Format::GSM:
if (enc != Encoding::NOT_PROVIDED)
throw std::runtime_error("gsm does not support `encoding` option.");
if (bps != BitDepth::NOT_PROVIDED)
throw std::runtime_error(
"gsm does not support `bits_per_sample` option.");
return std::make_tuple<>(SOX_ENCODING_GSM, 16);
default:
throw std::runtime_error("Unsupported format: " + format);
}
}
unsigned get_precision(const std::string filetype, py::dtype dtype) {
if (filetype == "mp3")
return SOX_UNSPEC;
if (filetype == "flac")
return 24;
if (filetype == "ogg" || filetype == "vorbis")
return SOX_UNSPEC;
if (filetype == "wav" || filetype == "amb") {
switch (dtype.num()) {
case 1: // byte in numpy dype num
return 8;
case 3: // short, in numpy dtype num
return 16;
case 5: // int, numpy dtype
return 32;
case 11: // float, numpy dtype
return 32;
default:
throw std::runtime_error("Unsupported dtype.");
}
}
if (filetype == "sph")
return 32;
if (filetype == "amr-nb") {
return 16;
}
if (filetype == "gsm") {
return 16;
}
if (filetype == "htk") {
return 16;
}
throw std::runtime_error("Unsupported file type: " + filetype);
}
} // namespace
sox_signalinfo_t get_signalinfo(
const py::array* waveform,
const int64_t sample_rate,
const std::string filetype,
const bool channels_first) {
return sox_signalinfo_t{
/*rate=*/static_cast<sox_rate_t>(sample_rate),
/*channels=*/
static_cast<unsigned>(waveform->shape(channels_first ? 0 : 1)),
/*precision=*/get_precision(filetype, waveform->dtype()),
/*length=*/static_cast<uint64_t>(waveform->size())};
}
sox_encodinginfo_t get_tensor_encodinginfo(py::dtype dtype) {
sox_encoding_t encoding = [&]() {
switch (dtype.num()) {
case 1: // byte
return SOX_ENCODING_UNSIGNED;
case 3: // short
return SOX_ENCODING_SIGN2;
case 5: // int32
return SOX_ENCODING_SIGN2;
case 11: // float
return SOX_ENCODING_FLOAT;
default:
throw std::runtime_error("Unsupported dtype.");
}
}();
unsigned bits_per_sample = [&]() {
switch (dtype.num()) {
case 1: // byte
return 8;
case 3: //short
return 16;
case 5: // int32
return 32;
case 11: // float
return 32;
default:
throw std::runtime_error("Unsupported dtype.");
}
}();
return sox_encodinginfo_t{
/*encoding=*/encoding,
/*bits_per_sample=*/bits_per_sample,
/*compression=*/HUGE_VAL,
/*reverse_bytes=*/sox_option_default,
/*reverse_nibbles=*/sox_option_default,
/*reverse_bits=*/sox_option_default,
/*opposite_endian=*/sox_false};
}
sox_encodinginfo_t get_encodinginfo_for_save(
const std::string& format,
const py::dtype dtype,
const tl::optional<double> compression,
const tl::optional<std::string> encoding,
const tl::optional<int64_t> bits_per_sample) {
auto enc = get_save_encoding(format, dtype, encoding, bits_per_sample);
return sox_encodinginfo_t{
/*encoding=*/std::get<0>(enc),
/*bits_per_sample=*/std::get<1>(enc),
/*compression=*/compression.value_or(HUGE_VAL),
/*reverse_bytes=*/sox_option_default,
/*reverse_nibbles=*/sox_option_default,
/*reverse_bits=*/sox_option_default,
/*opposite_endian=*/sox_false};
}
} // namespace sox_utils
} // namespace torchaudio
paddlespeech/audio/src/sox/utils.h 已删除 100644 → 0
浏览文件 @ c938a468
//code is from: https://github.com/pytorch/audio/blob/main/torchaudio/csrc/sox/utils.h
#pragma once
#include <pybind11/pybind11.h>
#include <pybind11/numpy.h>
#include <sox.h>
#include "paddlespeech/audio/src/optional/optional.hpp"
namespace py = pybind11;
namespace paddleaudio {
namespace sox_utils {
////////////////////////////////////////////////////////////////////////////////
// APIs for Python interaction
////////////////////////////////////////////////////////////////////////////////
/// Set sox global options
void set_seed(const int64_t seed);
void set_verbosity(const int64_t verbosity);
void set_use_threads(const bool use_threads);
void set_buffer_size(const int64_t buffer_size);
int64_t get_buffer_size();
std::vector<std::vector<std::string>> list_effects();
std::vector<std::string> list_read_formats();
std::vector<std::string> list_write_formats();
////////////////////////////////////////////////////////////////////////////////
// Utilities for sox_io / sox_effects implementations
////////////////////////////////////////////////////////////////////////////////
const std::unordered_set<std::string> UNSUPPORTED_EFFECTS =
{"input", "output", "spectrogram", "noiseprof", "noisered", "splice"};
/// helper class to automatically close sox_format_t*
struct SoxFormat {
explicit SoxFormat(sox_format_t* fd) noexcept;
SoxFormat(const SoxFormat& other) = delete;
SoxFormat(SoxFormat&& other) = delete;
SoxFormat& operator=(const SoxFormat& other) = delete;
SoxFormat& operator=(SoxFormat&& other) = delete;
~SoxFormat();
sox_format_t* operator->() const noexcept;
operator sox_format_t*() const noexcept;
void close();
private:
sox_format_t* fd_;
};
///
/// Verify that input Tensor is 2D, CPU and either uin8, int16, int32 or float32
void validate_input_tensor(const py::array);
void validate_input_file(const SoxFormat& sf, const std::string& path);
void validate_input_memfile(const SoxFormat &sf);
///
/// Get target dtype for the given encoding and precision.
py::dtype get_dtype(
const sox_encoding_t encoding,
const unsigned precision);
///
/// Convert sox_sample_t buffer to uint8/int16/int32/float32 Tensor
/// NOTE: This function might modify the values in the input buffer to
/// reduce the number of memory copy.
/// @param buffer Pointer to buffer that contains audio data.
/// @param num_samples The number of samples to read.
/// @param num_channels The number of channels. Used to reshape the resulting
/// Tensor.
/// @param dtype Target dtype. Determines the output dtype and value range in
/// conjunction with normalization.
/// @param noramlize Perform normalization. Only effective when dtype is not
/// kFloat32. When effective, the output tensor is kFloat32 type and value range
/// is [-1.0, 1.0]
/// @param channels_first When True, output Tensor has shape of [num_channels,
/// num_frames].
py::array convert_to_tensor(
sox_sample_t* buffer,
const int32_t num_samples,
const int32_t num_channels,
const py::dtype dtype,
const bool normalize,
const bool channels_first);
/// Extract extension from file path
const std::string get_filetype(const std::string path);
/// Get sox_signalinfo_t for passing a py::array object.
sox_signalinfo_t get_signalinfo(
const py::array* waveform,
const int64_t sample_rate,
const std::string filetype,
const bool channels_first);
/// Get sox_encodinginfo_t for Tensor I/O
sox_encodinginfo_t get_tensor_encodinginfo(const py::dtype dtype);
/// Get sox_encodinginfo_t for saving to file/file object
sox_encodinginfo_t get_encodinginfo_for_save(
const std::string& format,
const py::dtype dtype,
const tl::optional<double> compression,
const tl::optional<std::string> encoding,
const tl::optional<int64_t> bits_per_sample);
} // namespace sox_utils
} // namespace paddleaudio
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