vgmstream/winamp/sdk/in2.h

#ifndef NULLSOFT_WINAMP_IN2H
#define NULLSOFT_WINAMP_IN2H
#include "out.h"

// note: exported symbol is now winampGetInModule2.

#define IN_UNICODE 0x0F000000

#ifdef UNICODE_INPUT_PLUGIN
#define in_char wchar_t
#define IN_VER (IN_UNICODE | 0x100)
#else
#define in_char char
#define IN_VER 0x100
#endif

#define IN_MODULE_FLAG_USES_OUTPUT_PLUGIN 1
// By default, Winamp assumes that your input plugin wants to use Winamp's EQ, and doesn't do replay gain
// if you handle any of these yourself (EQ, Replay Gain adjustments), then set these flags accordingly
#define IN_MODULE_FLAG_EQ 2 // set this if you do your own EQ
#define IN_MODULE_FLAG_REPLAYGAIN 8 // set this if you adjusted volume for replay gain
                                                                        // for tracks with no replay gain metadata, you should clear this flag
                                                                        // UNLESS you handle "non_replaygain" gain adjustment yourself
#define IN_MODULE_FLAG_REPLAYGAIN_PREAMP 16 // use this if you queried for the replay gain preamp parameter and used it
                                                                                        // this parameter is new to 5.54
typedef struct 
{
    int version;                // module type (IN_VER)
    char *description;          // description of module, with version string

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

    char *FileExtensions;       // "mp3\0Layer 3 MPEG\0mp2\0Layer 2 MPEG\0mpg\0Layer 1 MPEG\0"
                                // May be altered from Config, so the user can select what they want

    int is_seekable;            // is this stream seekable?
    int UsesOutputPlug;         // does this plug-in use the output plug-ins? (musn't ever change, ever :)
                                                    // note that this has turned into a "flags" field
                                                    // see IN_MODULE_FLAG_*

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

    void (*Init)();             // called at program init
    void (*Quit)();             // called at program quit

#define GETFILEINFO_TITLE_LENGTH 2048
    void (*GetFileInfo)(const in_char *file, in_char *title, int *length_in_ms); // if file == NULL, current playing is used

#define INFOBOX_EDITED 0
#define INFOBOX_UNCHANGED 1
    int (*InfoBox)(const in_char *file, HWND hwndParent);

    int (*IsOurFile)(const in_char *fn);    // called before extension checks, to allow detection of mms://, etc
    // playback stuff
    int (*Play)(const in_char *fn);     // return zero on success, -1 on file-not-found, some other value on other (stopping winamp) error
    void (*Pause)();            // pause stream
    void (*UnPause)();          // unpause stream
    int (*IsPaused)();          // ispaused? return 1 if paused, 0 if not
    void (*Stop)();             // stop (unload) stream

    // time stuff
    int (*GetLength)();         // get length in ms
    int (*GetOutputTime)();     // returns current output time in ms. (usually returns outMod->GetOutputTime()
    void (*SetOutputTime)(int time_in_ms);  // seeks to point in stream (in ms). Usually you signal your thread to seek, which seeks and calls outMod->Flush()..

    // volume stuff
    void (*SetVolume)(int volume);  // from 0 to 255.. usually just call outMod->SetVolume
    void (*SetPan)(int pan);    // from -127 to 127.. usually just call outMod->SetPan

    // in-window builtin vis stuff

    void (*SAVSAInit)(int maxlatency_in_ms, int srate);     // call once in Play(). maxlatency_in_ms should be the value returned from outMod->Open()
    // call after opening audio device with max latency in ms and samplerate
    void (*SAVSADeInit)();  // call in Stop()


    // simple vis supplying mode
    void (*SAAddPCMData)(void *PCMData, int nch, int bps, int timestamp);
                                            // sets the spec data directly from PCM data
                                            // quick and easy way to get vis working :)
                                            // needs at least 576 samples :)

    // advanced vis supplying mode, only use if you're cool. Use SAAddPCMData for most stuff.
    int (*SAGetMode)();     // gets csa (the current type (4=ws,2=osc,1=spec))
                            // use when calling SAAdd()
    int (*SAAdd)(void *data, int timestamp, int csa); // sets the spec data, filled in by winamp


    // vis stuff (plug-in)
    // simple vis supplying mode
    void (*VSAAddPCMData)(void *PCMData, int nch, int bps, int timestamp); // sets the vis data directly from PCM data
                                            // quick and easy way to get vis working :)
                                            // needs at least 576 samples :)

    // advanced vis supplying mode, only use if you're cool. Use VSAAddPCMData for most stuff.
    int (*VSAGetMode)(int *specNch, int *waveNch); // use to figure out what to give to VSAAdd
    int (*VSAAdd)(void *data, int timestamp); // filled in by winamp, called by plug-in


    // call this in Play() to tell the vis plug-ins the current output params.
    void (*VSASetInfo)(int srate, int nch); // <-- Correct (benski, dec 2005).. old declaration had the params backwards


    // dsp plug-in processing:
    // (filled in by winamp, calld by input plug)

    // returns 1 if active (which means that the number of samples returned by dsp_dosamples
    // could be greater than went in.. Use it to estimate if you'll have enough room in the
    // output buffer
    int (*dsp_isactive)();

    // returns number of samples to output. This can be as much as twice numsamples.
    // be sure to allocate enough buffer for samples, then.
    int (*dsp_dosamples)(short int *samples, int numsamples, int bps, int nch, int srate);


    // eq stuff
    void (*EQSet)(int on, char data[10], int preamp); // 0-64 each, 31 is +0, 0 is +12, 63 is -12. Do nothing to ignore.

    // info setting (filled in by winamp)
    void (*SetInfo)(int bitrate, int srate, int stereo, int synched); // if -1, changes ignored? :)

    Out_Module *outMod; // filled in by winamp, optionally used :)
} In_Module;

// return values from the winampUninstallPlugin(HINSTANCE hdll, HWND parent, int param)
// which determine if we can uninstall the plugin immediately or on winamp restart
//
// uninstall support was added from 5.0+ and uninstall now support from 5.5+
// it is down to you to ensure that if uninstall now is returned that it will not cause a crash
// (ie don't use if you've been subclassing the main window)
#define IN_PLUGIN_UNINSTALL_NOW    0x1
#define IN_PLUGIN_UNINSTALL_REBOOT 0x0

#endif