MSResampler/wavsource.h at master · nu774/MSResampler · GitHub

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#ifndef WaveSource_H
#define WaveSource_H

#include "iointer.h"
#include "cautil.h"

namespace wave {
    struct GUID {
        uint32_t Data1;
        uint16_t Data2;
        uint16_t Data3;
        uint8_t  Data4[8];
    };
    extern const GUID ksFormatSubTypePCM;
    extern const GUID ksFormatSubTypeFloat;
}

class WaveSource: public ISeekableSource {
    bool m_seekable;
    int m_block_align;
    int64_t m_data_pos;
    int64_t m_position;
    uint64_t m_length;
    std::shared_ptr<FILE> m_fp;
    std::vector<uint32_t> m_chanmap;
    std::vector<uint8_t> m_buffer;
    AudioStreamBasicDescription m_asbd;
public:
    WaveSource(const std::shared_ptr<FILE> &fp, bool ignorelength = false);
    uint64_t length() const { return m_length; }
    const AudioStreamBasicDescription &getSampleFormat() const
    {
        return m_asbd;
    }
    const std::vector<uint32_t> *getChannels() const
    {
        return m_chanmap.size() ? &m_chanmap : 0;
    }
    int64_t getPosition() { return m_position; }
    size_t readSamples(void *buffer, size_t nsamples);
    bool isSeekable() { return util::is_seekable(fileno(m_fp.get())); }
    void seekTo(int64_t count);
private:
    int fd() { return fileno(m_fp.get()); }
    int64_t parse();
    void read16le(void *n);
    void read32le(void *n);
    void read64le(void *n);
    void skip(int64_t n);
    uint32_t nextChunk(uint32_t *size);
    int64_t ds64();
    void fmt(size_t size);
};

#endif