public void readWaveData(ref cWavePcm pcm, string filename)
{
// ファイルオープン
FileStream fs = new FileStream(filename, FileMode.Open, FileAccess.Read);
BinaryReader br = new BinaryReader(fs);
cWaveBox box = new cWaveBox();
Console.Write("waveファイル名：{0}\n", filename);
// RIFF取得
byte[] riff_str = new byte[box.ID_SIZE];
br.Read(riff_str, 0, box.ID_SIZE);
box.riff_chunk_id = Encoding.ASCII.GetString(riff_str);
Console.Write("riff_chunk_id：{0}\n", box.riff_chunk_id);
// サイズ取得
byte[] riff_size = new byte[sizeof(int)];
br.Read(riff_size, 0, sizeof(int));
box.riff_chunk_size = BitConverter.ToInt32(riff_size, 0);
Console.Write("riff_chunk_size：{0} {1}\n", box.riff_chunk_size, sizeof(int));
// riff_form_type取得
byte[] riff_type_str = new byte[box.ID_SIZE];
br.Read(riff_type_str, 0, box.ID_SIZE);
box.riff_form_type = Encoding.ASCII.GetString(riff_type_str);
Console.Write("riff_form_type：{0}\n", box.riff_form_type);
// fmt_chunk_id取得
byte[] fmt_chunk_str = new byte[box.ID_SIZE];
br.Read(fmt_chunk_str, 0, box.ID_SIZE);
box.fmt_chunk_id = Encoding.ASCII.GetString(fmt_chunk_str);
Console.Write("fmt_chunk_id：{0}\n", box.fmt_chunk_id);
// fmt_chunk_size取得
byte[] fmt_chunk_size = new byte[sizeof(int)];
br.Read(fmt_chunk_size, 0, sizeof(int));
box.fmt_chunk_size = BitConverter.ToInt32(fmt_chunk_size, 0);
Console.Write("fmt_chunk_size：{0} {1}\n", box.fmt_chunk_size, sizeof(int));
// fmt_wave_format_type取得
byte[] fmt_wave_format_type = new byte[sizeof(short)];
br.Read(fmt_wave_format_type, 0, sizeof(short));
box.fmt_wave_format_type = BitConverter.ToInt16(fmt_wave_format_type, 0);
Console.Write("fmt_wave_format_type：{0} {1}\n", box.fmt_wave_format_type, sizeof(short));
// fmt_channel取得
byte[] fmt_channel = new byte[sizeof(short)];
br.Read(fmt_channel, 0, sizeof(short));
box.fmt_channel = BitConverter.ToInt16(fmt_channel, 0);
Console.Write("fmt_channel：{0} {1}\n", box.fmt_channel, sizeof(short));
// fmt_samples_per_sec取得
byte[] fmt_samples_per_sec = new byte[sizeof(int)];
br.Read(fmt_samples_per_sec, 0, sizeof(int));
box.fmt_samples_per_sec = BitConverter.ToInt32(fmt_samples_per_sec, 0);
Console.Write("fmt_samples_per_sec：{0} {1}\n", box.fmt_samples_per_sec, sizeof(int));
// fmt_bytes_per_sec取得
byte[] fmt_bytes_per_sec = new byte[sizeof(int)];
br.Read(fmt_bytes_per_sec, 0, sizeof(int));
box.fmt_bytes_per_sec = BitConverter.ToInt32(fmt_bytes_per_sec, 0);
Console.Write("fmt_bytes_per_sec：{0} {1}\n", box.fmt_bytes_per_sec, sizeof(int));
// fmt_block_size取得
byte[] fmt_block_size = new byte[sizeof(short)];
br.Read(fmt_block_size, 0, sizeof(short));
box.fmt_block_size = BitConverter.ToInt16(fmt_block_size, 0);
Console.Write("fmt_block_size：{0} {1}\n", box.fmt_block_size, sizeof(short));
// fmt_bits_per_sample取得
byte[] fmt_bits_per_sample = new byte[sizeof(short)];
br.Read(fmt_bits_per_sample, 0, sizeof(short));
box.fmt_bits_per_sample = BitConverter.ToInt16(fmt_bits_per_sample, 0);
Console.Write("fmt_bits_per_sample：{0} {1}\n", box.fmt_bits_per_sample, sizeof(short));
// data_chunk_id取得
byte[] data_chunk_id = new byte[box.ID_SIZE];
br.Read(data_chunk_id, 0, box.ID_SIZE);
box.data_chunk_id = Encoding.ASCII.GetString(data_chunk_id);
Console.Write("data_chunk_id：{0}\n", box.data_chunk_id);
// data_chunk_size取得
byte[] data_chunk_size = new byte[sizeof(int)];
br.Read(data_chunk_size, 0, sizeof(int));
box.data_chunk_size = BitConverter.ToInt32(data_chunk_size, 0);
Console.Write("data_chunk_size：{0} {1}\n", box.data_chunk_size, sizeof(int));
// pcmに情報を入れる
// 標本化周波数
pcm.fs = box.fmt_samples_per_sec;
// 量子化精度
pcm.bits = box.fmt_bits_per_sample;
// モノラルかステレオか判別
pcm.channel = box.fmt_channel;
// モノラルの場合
if (pcm.channel == 1)
{
// 音データの長さ
pcm.length = box.data_chunk_size / 2;
// 音データ取得
pcm.data = new double[pcm.length];
}
// ステレオの場合
else
{
// 音データの長さ
pcm.length = box.data_chunk_size / 4;
// 音データ取得
pcm.LeftData = new double[pcm.length];
pcm.RightData = new double[pcm.length];
}
for (int num = 0; num < pcm.length; num++)
{
if (pcm.channel == 1)
{
readData(ref pcm.data[num], br);
}
else
{
readData(ref pcm.LeftData[num], br);/* 音データ（Lチャンネル）の読み取り */
readData(ref pcm.RightData[num], br);/* 音データ（Rチャンネル）の読み取り */
}
}
// ファイルを閉じる
fs.Close();
}
// データ書き出し
public void writeWaveData(ref cWavePcm pcm, string filename)
{
// ファイルオープン
FileStream fs = new FileStream(filename, FileMode.Create);
Console.Write("ファイル名：{0}\n", filename);
// 宣言
string riff_chunk_ID = "RIFF";
string riff_form_ID = "WAVE";
string fmt_chunk_ID = "fmt ";
string data_chunk_ID = "data";
byte[] riff_name = new byte[4];
byte[] riff_chunk_size = new byte[sizeof(int)];
byte[] riff_form = new byte[4];
byte[] fmt_chunk = new byte[4];
byte[] fmt_chunk_size = new byte[sizeof(int)];
byte[] fmt_wave_format_type = new byte[sizeof(short)];
byte[] fmt_channel = new byte[sizeof(short)];
byte[] fmt_samples_per_sec = new byte[sizeof(int)];
byte[] fmt_bytes_per_sec = new byte[sizeof(int)];
byte[] fmt_block_size = new byte[sizeof(short)];
byte[] fmt_bits_per_sample = new byte[sizeof(short)];
byte[] data_chunk = new byte[4];
byte[] data_chunk_size = new byte[sizeof(int)];
// 文字列設定
riff_name = Encoding.GetEncoding("ASCII").GetBytes(riff_chunk_ID);
// 文字列指定
riff_form = Encoding.GetEncoding("ASCII").GetBytes(riff_form_ID);
// 文字列指定
fmt_chunk = Encoding.GetEncoding("ASCII").GetBytes(fmt_chunk_ID);
// 文字列指定
data_chunk = Encoding.GetEncoding("ASCII").GetBytes(data_chunk_ID);
// fmt_bits_per_sample
fmt_bits_per_sample = BitConverter.GetBytes(pcm.bits);
// fmt_chunk_size
fmt_chunk_size = BitConverter.GetBytes(16);
// fmt_wave_format_type
fmt_wave_format_type = BitConverter.GetBytes(1);
// fmt_channel
fmt_channel = BitConverter.GetBytes(pcm.channel);
// fmt_samples_per_sec
fmt_samples_per_sec = BitConverter.GetBytes(pcm.fs);
// riff_chunk_size
// fmt_bytes_per_sec
// fmt_block_size
// data_chunk_size
if (pcm.channel == 1)
{
riff_chunk_size = BitConverter.GetBytes(36 + pcm.length * 2);
fmt_bytes_per_sec = BitConverter.GetBytes(pcm.fs * pcm.bits / 8);
fmt_block_size = BitConverter.GetBytes(pcm.bits / 8);
data_chunk_size = BitConverter.GetBytes(pcm.length * 2);
}
else
{
riff_chunk_size = BitConverter.GetBytes(36 + pcm.length * 4);
fmt_bytes_per_sec = BitConverter.GetBytes(pcm.fs * pcm.bits / 8 * 2);
fmt_block_size = BitConverter.GetBytes(pcm.bits / 8 * 2);
data_chunk_size = BitConverter.GetBytes(pcm.length * 4);
}
// 書き込み
fs.Write(riff_name, 0, 4);
fs.Write(riff_chunk_size, 0, sizeof(int));
fs.Write(riff_form, 0, 4);
fs.Write(fmt_chunk, 0, 4);
fs.Write(fmt_chunk_size, 0, sizeof(int));
fs.Write(fmt_wave_format_type, 0, sizeof(short));
fs.Write(fmt_channel, 0, sizeof(short));
fs.Write(fmt_samples_per_sec, 0, sizeof(int));
fs.Write(fmt_bytes_per_sec, 0, sizeof(int));
fs.Write(fmt_block_size, 0, sizeof(short));
fs.Write(fmt_bits_per_sample, 0, sizeof(short));
fs.Write(data_chunk, 0, 4);
fs.Write(data_chunk_size, 0, sizeof(int));
// data
for (int n = 0; n < pcm.length; n++)
{
if (pcm.channel == 1)
{
writeData(ref fs, pcm.data[n]);
}
else
{
writeData(ref fs, pcm.LeftData[n]);
writeData(ref fs, pcm.RightData[n]);
}
}
// ファイルを閉じる
fs.Close();
}
