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98 lines
2.5 KiB
C++
98 lines
2.5 KiB
C++
#ifndef WAV_HPP_
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#define WAV_HPP_
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#include <cstdint>
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#include <cstring>
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#include <fstream>
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#include <string>
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#include <vector>
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namespace wav
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{
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struct header {
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char riff[4]; // "RIFF"
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uint32_t filesize; // Total file size minus eight bytes
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char wave[4]; // "WAVE"
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bool valid() const {
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return strncmp(riff, "RIFF", 4) == 0 && filesize > 8 && strncmp(wave, "WAVE", 4) == 0;
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}
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} __attribute__ ((packed));
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struct format {
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char fmt_[4]; // "fmt "
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uint32_t size;
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uint16_t type;
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uint16_t channelcount;
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uint32_t samplerate;
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uint32_t byterate;
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uint16_t unused;
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uint16_t bps;
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bool valid() const {
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return strncmp(fmt_, "fmt ", 4) == 0;
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}
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} __attribute__ ((packed));
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struct data {
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char data[4]; // "data"
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uint32_t size;
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bool valid() const {
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return strncmp(data, "data", 4) == 0;
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}
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} __attribute__ ((packed));
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class clip {
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public:
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clip(const std::string& path) {
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std::ifstream file (path);
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if (!file.good())
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return;
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{
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header h;
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file.read(reinterpret_cast<char *>(&h), sizeof(header));
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if (!h.valid())
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return;
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}
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{
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format f;
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file.read(reinterpret_cast<char *>(&f), sizeof(format));
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if (!f.valid() || f.type != 1) // ensure PCM
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return;
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}
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{
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wav::data d;
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file.read(reinterpret_cast<char *>(&d), sizeof(wav::data));
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if (!d.valid())
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return;
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m_data.resize(d.size / sizeof(int16_t));
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m_next = m_data.begin();
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file.read(reinterpret_cast<char *>(m_data.data()), d.size);
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}
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}
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clip() = default;
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bool valid() const {
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return !m_data.empty();
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}
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const int16_t *data() const {
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return m_data.data();
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}
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void next(int16_t *buf, unsigned int size) {
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for (unsigned int i = 0; i < size; ++i) {
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if (m_next == m_data.end())
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m_next = m_data.begin();
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else
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*buf++ = *m_next++;
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}
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}
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private:
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std::vector<int16_t> m_data;
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decltype(m_data.begin()) m_next;
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};
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}
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#endif // WAV_HPP_
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