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out.h

#define OUT_VER 0x10

00003 typedef struct
{
    int version;                // module version (OUT_VER)
    char *description;          // description of module, with version string
    int id;                     // module id. each input module gets its own. non-nullsoft modules should
                                // be >= 65536.

    HWND hMainWindow;           // winamp's main window (filled in by winamp)
    HINSTANCE hDllInstance;     // DLL instance handle (filled in by winamp)

    void (*Config)(HWND hwndParent); // configuration dialog
    void (*About)(HWND hwndParent);  // about dialog

    void (*Init)();             // called when loaded
    void (*Quit)();             // called when unloaded

    int (*Open)(int samplerate, int numchannels, int bitspersamp, int bufferlenms, int prebufferms);
                    // returns >=0 on success, <0 on failure
                    // NOTENOTENOTE: bufferlenms and prebufferms are ignored in most if not all output plug-ins.
                    //    ... so don't expect the max latency returned to be what you asked for.
                    // returns max latency in ms (0 for diskwriters, etc)
                    // bufferlenms and prebufferms must be in ms. 0 to use defaults.
                    // prebufferms must be <= bufferlenms

    void (*Close)();    // close the ol' output device.

    int (*Write)(char *buf, int len);
                    // 0 on success. Len == bytes to write (<= 8192 always). buf is straight audio data.
                    // 1 returns not able to write (yet). Non-blocking, always.

    int (*CanWrite)();  // returns number of bytes possible to write at a given time.
                        // Never will decrease unless you call Write (or Close, heh)

    int (*IsPlaying)(); // non0 if output is still going or if data in buffers waiting to be
                        // written (i.e. closing while IsPlaying() returns 1 would truncate the song

    int (*Pause)(int pause); // returns previous pause state

    void (*SetVolume)(int volume); // volume is 0-255
    void (*SetPan)(int pan); // pan is -128 to 128

    void (*Flush)(int t);   // flushes buffers and restarts output at time t (in ms)
                            // (used for seeking)

    int (*GetOutputTime)(); // returns played time in MS
    int (*GetWrittenTime)(); // returns time written in MS (used for synching up vis stuff)

} Out_Module;



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