competition update
This commit is contained in:
nckcard
198
language_model/runtime/core/frontend/wav.h
Normal file
198
language_model/runtime/core/frontend/wav.h
Normal file
@@ -0,0 +1,198 @@
|
||||
// Copyright (c) 2016 Personal (Binbin Zhang)
|
||||
// Created on 2016-08-15
|
||||
//
|
||||
// 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.
|
||||
|
||||
#ifndef FRONTEND_WAV_H_
|
||||
#define FRONTEND_WAV_H_
|
||||
|
||||
#include <assert.h>
|
||||
#include <stdint.h>
|
||||
#include <stdio.h>
|
||||
#include <stdlib.h>
|
||||
#include <string.h>
|
||||
|
||||
#include <string>
|
||||
|
||||
#include "utils/log.h"
|
||||
|
||||
namespace wenet {
|
||||
|
||||
struct WavHeader {
|
||||
char riff[4]; // "riff"
|
||||
unsigned int size;
|
||||
char wav[4]; // "WAVE"
|
||||
char fmt[4]; // "fmt "
|
||||
unsigned int fmt_size;
|
||||
uint16_t format;
|
||||
uint16_t channels;
|
||||
unsigned int sample_rate;
|
||||
unsigned int bytes_per_second;
|
||||
uint16_t block_size;
|
||||
uint16_t bit;
|
||||
char data[4]; // "data"
|
||||
unsigned int data_size;
|
||||
};
|
||||
|
||||
class WavReader {
|
||||
public:
|
||||
explicit WavReader(const std::string& filename) {
|
||||
FILE* fp = fopen(filename.c_str(), "rb");
|
||||
if (NULL == fp) {
|
||||
LOG(FATAL) << "Error in read " << filename;
|
||||
}
|
||||
|
||||
WavHeader header;
|
||||
fread(&header, 1, sizeof(header), fp);
|
||||
if (header.fmt_size < 16) {
|
||||
fprintf(stderr,
|
||||
"WaveData: expect PCM format data "
|
||||
"to have fmt chunk of at least size 16.\n");
|
||||
exit(1);
|
||||
} else if (header.fmt_size > 16) {
|
||||
int offset = 44 - 8 + header.fmt_size - 16;
|
||||
fseek(fp, offset, SEEK_SET);
|
||||
fread(header.data, 8, sizeof(char), fp);
|
||||
}
|
||||
// check "riff" "WAVE" "fmt " "data"
|
||||
|
||||
// Skip any subchunks between "fmt" and "data". Usually there will
|
||||
// be a single "fact" subchunk, but on Windows there can also be a
|
||||
// "list" subchunk.
|
||||
while (0 != strncmp(header.data, "data", 4)) {
|
||||
// We will just ignore the data in these chunks.
|
||||
fseek(fp, header.data_size, SEEK_CUR);
|
||||
// read next subchunk
|
||||
fread(header.data, 8, sizeof(char), fp);
|
||||
}
|
||||
|
||||
num_channel_ = header.channels;
|
||||
sample_rate_ = header.sample_rate;
|
||||
bits_per_sample_ = header.bit;
|
||||
int num_data = header.data_size / (bits_per_sample_ / 8);
|
||||
data_ = new float[num_data];
|
||||
num_sample_ = num_data / num_channel_;
|
||||
|
||||
for (int i = 0; i < num_data; ++i) {
|
||||
switch (bits_per_sample_) {
|
||||
case 8: {
|
||||
char sample;
|
||||
fread(&sample, 1, sizeof(char), fp);
|
||||
data_[i] = static_cast<float>(sample);
|
||||
break;
|
||||
}
|
||||
case 16: {
|
||||
int16_t sample;
|
||||
fread(&sample, 1, sizeof(int16_t), fp);
|
||||
data_[i] = static_cast<float>(sample);
|
||||
break;
|
||||
}
|
||||
case 32: {
|
||||
int sample;
|
||||
fread(&sample, 1, sizeof(int), fp);
|
||||
data_[i] = static_cast<float>(sample);
|
||||
break;
|
||||
}
|
||||
default:
|
||||
fprintf(stderr, "unsupported quantization bits");
|
||||
exit(1);
|
||||
}
|
||||
}
|
||||
fclose(fp);
|
||||
}
|
||||
|
||||
int num_channel() const { return num_channel_; }
|
||||
int sample_rate() const { return sample_rate_; }
|
||||
int bits_per_sample() const { return bits_per_sample_; }
|
||||
int num_sample() const { return num_sample_; }
|
||||
|
||||
~WavReader() {
|
||||
if (data_ != NULL) delete[] data_;
|
||||
}
|
||||
|
||||
const float* data() const { return data_; }
|
||||
|
||||
private:
|
||||
int num_channel_;
|
||||
int sample_rate_;
|
||||
int bits_per_sample_;
|
||||
int num_sample_; // sample points per channel
|
||||
float* data_;
|
||||
};
|
||||
|
||||
class WavWriter {
|
||||
public:
|
||||
WavWriter(const float* data, int num_sample, int num_channel, int sample_rate,
|
||||
int bits_per_sample)
|
||||
: data_(data),
|
||||
num_sample_(num_sample),
|
||||
num_channel_(num_channel),
|
||||
sample_rate_(sample_rate),
|
||||
bits_per_sample_(bits_per_sample) {}
|
||||
|
||||
void Write(const std::string& filename) {
|
||||
FILE* fp = fopen(filename.c_str(), "w");
|
||||
// init char 'riff' 'WAVE' 'fmt ' 'data'
|
||||
WavHeader header;
|
||||
char wav_header[44] = {0x52, 0x49, 0x46, 0x46, 0x00, 0x00, 0x00, 0x00, 0x57,
|
||||
0x41, 0x56, 0x45, 0x66, 0x6d, 0x74, 0x20, 0x10, 0x00,
|
||||
0x00, 0x00, 0x01, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00,
|
||||
0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00,
|
||||
0x64, 0x61, 0x74, 0x61, 0x00, 0x00, 0x00, 0x00};
|
||||
memcpy(&header, wav_header, sizeof(header));
|
||||
header.channels = num_channel_;
|
||||
header.bit = bits_per_sample_;
|
||||
header.sample_rate = sample_rate_;
|
||||
header.data_size = num_sample_ * num_channel_ * (bits_per_sample_ / 8);
|
||||
header.size = sizeof(header) - 8 + header.data_size;
|
||||
header.bytes_per_second =
|
||||
sample_rate_ * num_channel_ * (bits_per_sample_ / 8);
|
||||
header.block_size = num_channel_ * (bits_per_sample_ / 8);
|
||||
|
||||
fwrite(&header, 1, sizeof(header), fp);
|
||||
|
||||
for (int i = 0; i < num_sample_; ++i) {
|
||||
for (int j = 0; j < num_channel_; ++j) {
|
||||
switch (bits_per_sample_) {
|
||||
case 8: {
|
||||
char sample = static_cast<char>(data_[i * num_channel_ + j]);
|
||||
fwrite(&sample, 1, sizeof(sample), fp);
|
||||
break;
|
||||
}
|
||||
case 16: {
|
||||
int16_t sample = static_cast<int16_t>(data_[i * num_channel_ + j]);
|
||||
fwrite(&sample, 1, sizeof(sample), fp);
|
||||
break;
|
||||
}
|
||||
case 32: {
|
||||
int sample = static_cast<int>(data_[i * num_channel_ + j]);
|
||||
fwrite(&sample, 1, sizeof(sample), fp);
|
||||
break;
|
||||
}
|
||||
}
|
||||
}
|
||||
}
|
||||
fclose(fp);
|
||||
}
|
||||
|
||||
private:
|
||||
const float* data_;
|
||||
int num_sample_; // total float points in data_
|
||||
int num_channel_;
|
||||
int sample_rate_;
|
||||
int bits_per_sample_;
|
||||
};
|
||||
|
||||
} // namespace wenet
|
||||
|
||||
#endif // FRONTEND_WAV_H_
|
||||
Reference in New Issue
Block a user