func Make_riff_header(r *bufio.Reader) (rh *Riff_header, bytes_read int) {
const (
CHUNK_ID_SIZE = 4
FORMAT_SIZE = 4
RIFF_HEADER_SIZE = 4
)
rh = new(Riff_header)
rh.chunkID = utils.Read_fixed_string(r, CHUNK_ID_SIZE)
rh.chunkSize = utils.Read_uint32(r)
rh.format = utils.Read_fixed_string(r, FORMAT_SIZE)
bytes_read = RIFF_HEADER_SIZE
return rh, bytes_read
}
func Make_data_subchunk(r *bufio.Reader) (fs *Data_subchunk, bytes_read int) {
const (
SUBCHUNK_ID_SIZE = 4
)
fs = new(Data_subchunk)
fs.subchunkID = utils.Read_fixed_string(r, SUBCHUNK_ID_SIZE)
fs.size = utils.Read_uint32(r)
_ = utils.Read_bytes(r, int(fs.size))
bytes_read = int(fs.size) + 8
return fs, bytes_read
}
func Make_fmt_subchunk(r *bufio.Reader) (fs *Fmt_subchunk, bytes_read int) {
const (
SUBCHUNK_ID_SIZE = 4
FMT_SUBCHUNK_SIZE = 24
)
fs = new(Fmt_subchunk)
fs.subchunkID = utils.Read_fixed_string(r, SUBCHUNK_ID_SIZE)
fs.size = utils.Read_uint32(r)
fs.format = utils.Read_uint16(r)
fs.numChannels = utils.Read_uint16(r)
fs.sampleRate = utils.Read_uint32(r)
fs.byteRate = utils.Read_uint32(r)
fs.blockAlign = utils.Read_uint16(r)
fs.bitsPerSample = utils.Read_uint16(r)
return fs, FMT_SUBCHUNK_SIZE
}