You cannot select more than 25 topics
Topics must start with a letter or number, can include dashes ('-') and can be up to 35 characters long.
96 lines
2.4 KiB
C++
96 lines
2.4 KiB
C++
#ifndef WAV_HPP_
|
|
#define WAV_HPP_
|
|
|
|
#include <cstdint>
|
|
#include <cstring>
|
|
#include <fstream>
|
|
|
|
namespace wav
|
|
{
|
|
struct header {
|
|
char riff[4]; // "RIFF"
|
|
uint32_t filesize; // Total file size minus eight bytes
|
|
char wave[4]; // "WAVE"
|
|
|
|
bool valid() const {
|
|
return strncmp(riff, "RIFF", 4) == 0 && filesize > 8 && strncmp(wave, "WAVE", 4) == 0;
|
|
}
|
|
} __attribute__ ((packed));
|
|
|
|
struct format {
|
|
char fmt_[4]; // "fmt "
|
|
uint32_t size;
|
|
uint16_t type;
|
|
uint16_t channelcount;
|
|
uint32_t samplerate;
|
|
uint32_t byterate;
|
|
uint16_t unused;
|
|
uint16_t bps;
|
|
|
|
bool valid() const {
|
|
return strncmp(fmt_, "fmt ", 4) == 0;
|
|
}
|
|
} __attribute__ ((packed));
|
|
|
|
struct data {
|
|
char data[4]; // "data"
|
|
uint32_t size;
|
|
|
|
bool valid() const {
|
|
return strncmp(data, "data", 4) == 0;
|
|
}
|
|
} __attribute__ ((packed));
|
|
|
|
class clip {
|
|
public:
|
|
clip(const char *path) {
|
|
std::ifstream file (path);
|
|
if (!file.good())
|
|
return;
|
|
{
|
|
header h;
|
|
file.read(reinterpret_cast<char *>(&h), sizeof(header));
|
|
if (!h.valid())
|
|
return;
|
|
}
|
|
{
|
|
format f;
|
|
file.read(reinterpret_cast<char *>(&f), sizeof(format));
|
|
if (!f.valid() || f.type != 1) // ensure PCM
|
|
return;
|
|
}
|
|
{
|
|
wav::data d;
|
|
file.read(reinterpret_cast<char *>(&d), sizeof(wav::data));
|
|
if (!d.valid())
|
|
return;
|
|
m_data = new char[d.size + 4096 - (d.size % 4096)];
|
|
m_size = d.size;
|
|
file.read(m_data, d.size);
|
|
}
|
|
}
|
|
|
|
bool valid() const {
|
|
return m_data != nullptr && m_size > 0;
|
|
}
|
|
auto data() const {
|
|
return m_data;
|
|
}
|
|
auto next(unsigned int chunksize = 3000) {
|
|
if (m_pos == m_size) {
|
|
m_pos = 0;
|
|
}
|
|
auto ret = m_data + m_pos;
|
|
m_pos = std::min(m_pos + chunksize, m_size);
|
|
return ret;
|
|
}
|
|
private:
|
|
char *m_data = nullptr;
|
|
uint32_t m_size = 0;
|
|
uint32_t m_pos = 0;
|
|
};
|
|
}
|
|
|
|
#endif // WAV_HPP_
|
|
|