libmpdemux/demux_xmms_plugin.h

   1 /*  XMMS - Cross-platform multimedia player
   2  *  Copyright (C) 1998-2000  Peter Alm, Mikael Alm, Olle Hallnas, Thomas Nilsson and 4Front Technologies
   3  *
   4  * Redistribution and use in source and binary forms, with or without
   5  * modification, are permitted provided that the following conditions are
   6  * met: 1. Redistributions of source code must retain the above copyright
   7  * notice, this list of conditions and the following disclaimer. 2.
   8  * Redistributions in binary form must reproduce the above copyright notice,
   9  * this list of conditions and the following disclaimer in the documentation
  10  * and/or other materials provided with the distribution.
  11  *
  12  * THIS SOFTWARE IS PROVIDED BY THE AUTHOR AND CONTRIBUTORS ``AS IS'' AND ANY
  13  * EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED
  14  * WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE
  15  * DISCLAIMED.  IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE FOR
  16  * ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
  17  * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR
  18  * SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER
  19  * CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
  20  * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
  21  * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
  22  * SUCH DAMAGE.
  23  */
  24 #ifndef PLUGIN_H
  25 #define PLUGIN_H
  26
  27 typedef enum
  28 {
  29         FMT_U8, FMT_S8, FMT_U16_LE, FMT_U16_BE, FMT_U16_NE, FMT_S16_LE, FMT_S16_BE, FMT_S16_NE
  30 }
  31 AFormat;
  32
  33 typedef struct
  34 {
  35         void *handle;           /* Filled in by xmms */
  36         char *filename;         /* Filled in by xmms */
  37         char *description;      /* The description that is shown in the preferences box */
  38         void (*init) (void);
  39         void (*about) (void);   /* Show the about box */
  40         void (*configure) (void);       /* Show the configuration dialog */
  41         void (*get_volume) (int *l, int *r);
  42         void (*set_volume) (int l, int r);      /* Set the volume */
  43         int (*open_audio) (AFormat fmt, int rate, int nch);     /* Open the device, if the device can't handle the given
  44                                                                    parameters the plugin is responsible for downmixing
  45                                                                    the data to the right format before outputting it */
  46         void (*write_audio) (void *ptr, int length);    /* The input plugin calls this to write data to the output
  47                                                            buffer */
  48         void (*close_audio) (void);     /* No comment... */
  49         void (*flush) (int time);       /* Flush the buffer and set the plugins internal timers to time */
  50         void (*pause) (short paused);   /* Pause or unpause the output */
  51         int (*buffer_free) (void);      /* Return the amount of data that can be written to the buffer,
  52                                            two calls to this without a call to write_audio should make
  53                                            the plugin output audio directly */
  54         int (*buffer_playing) (void);   /* Returns TRUE if the plugin currently is playing some audio,
  55                                            otherwise return FALSE */
  56         int (*output_time) (void);      /* Return the current playing time */
  57         int (*written_time) (void);     /* Return the length of all the data that has been written to
  58                                            the buffer */
  59 }
  60 OutputPlugin;
  61
  62 typedef struct
  63 {
  64         void *handle;           /* Filled in by xmms */
  65         char *filename;         /* Filled in by xmms */
  66         char *description;      /* The description that is shown in the preferences box */
  67         void (*init) (void);    /* Called when the plugin is loaded */
  68         void (*cleanup) (void); /* Called when the plugin is unloaded */
  69         void (*about) (void);   /* Show the about box */
  70         void (*configure) (void);       /* Show the configure box */
  71         int (*mod_samples) (void *data, int length, AFormat fmt, int srate, int nch);   /* Modify samples */
  72         void (*query_format) (AFormat *fmt,int *rate, int *nch);
  73 }
  74 EffectPlugin;
  75
  76 typedef enum
  77 {
  78         INPUT_VIS_ANALYZER, INPUT_VIS_SCOPE, INPUT_VIS_VU, INPUT_VIS_OFF
  79 }
  80 InputVisType;
  81
  82 typedef struct
  83 {
  84         void *handle;           /* Filled in by xmms */
  85         char *filename;         /* Filled in by xmms */
  86         char *description;      /* The description that is shown in the preferences box */
  87         void (*init) (void);    /* Called when the plugin is loaded */
  88         void (*about) (void);   /* Show the about box */
  89         void (*configure) (void);
  90         int (*is_our_file) (char *filename);    /* Return 1 if the plugin can handle the file */
  91         void *(*scan_dir) (char *dirname);      /* Look in Input/cdaudio/cdaudio.c to see how */
  92         /* to use this */
  93         void (*play_file) (char *filename);     /* Guess what... */
  94         void (*stop) (void);    /* Tricky one */
  95         void (*pause) (short paused);   /* Pause or unpause */
  96         void (*seek) (int time);        /* Seek to the specified time */
  97         void (*set_eq) (int on, float preamp, float *bands);    /* Set the equalizer, most plugins won't be able to do this */
  98         int (*get_time) (void); /* Get the time, usually returns the output plugins output time */
  99         void (*get_volume) (int *l, int *r);    /* Input-plugin specific volume functions, just provide a NULL if */
 100         void (*set_volume) (int l, int r);      /*  you want the output plugin to handle it */
 101         void (*cleanup) (void);                 /* Called when xmms exit */
 102         InputVisType (*get_vis_type) (void); /* OBSOLETE, DO NOT USE! */
 103         void (*add_vis_pcm) (int time, AFormat fmt, int nch, int length, void *ptr); /* Send data to the visualization plugins
 104                                                                                         Preferably 512 samples/block */
 105         void (*set_info) (char *title, int length, int rate, int freq, int nch);        /* Fill in the stuff that is shown in the player window
 106                                                                                            set length to -1 if it's unknown. Filled in by xmms */
 107         void (*set_info_text) (char *text);     /* Show some text in the song title box in the main window,
 108                                                    call it with NULL as argument to reset it to the song title.
 109                                                    Filled in by xmms */
 110         void (*get_song_info) (char *filename, char **title, int *length);      /* Function to grab the title string */
 111         void (*file_info_box) (char *filename);         /* Bring up an info window for the filename passed in */
 112         OutputPlugin *output;   /* Handle to the current output plugin. Filled in by xmms */
 113 }
 114 InputPlugin;
 115
 116 /* So that input plugins can get the title formatting information */
 117 char *xmms_get_gentitle_format(void);
 118
 119 /* So that output plugins can communicate with effect plugins */
 120 EffectPlugin *get_current_effect_plugin(void);
 121 int effects_enabled(void);
 122
 123 typedef struct
 124 {
 125         void *handle;           /* Filled in by xmms */
 126         char *filename;         /* Filled in by xmms */
 127         int xmms_session;       /* The session ID for attaching to the control socket */
 128         char *description;      /* The description that is shown in the preferences box */
 129         void (*init) (void);    /* Called when the plugin is enabled */
 130         void (*about) (void);   /* Show the about box */
 131         void (*configure) (void);
 132         void (*cleanup) (void); /* Called when the plugin is disabled or when xmms exits */
 133 }
 134 GeneralPlugin;
 135
 136 typedef struct _VisPlugin
 137 {
 138         void *handle;   /* Filled in by xmms */
 139         char *filename; /* Filled in by xmms */
 140         int xmms_session; /* The session ID for attaching to the control socket */
 141         char *description; /* The description that is shown in the preferences box */
 142         int num_pcm_chs_wanted; /* Numbers of PCM channels wanted in the call to render_pcm */
 143         int num_freq_chs_wanted; /* Numbers of freq channels wanted in the call to render_freq */
 144         void (*init)(void); /* Called when the plugin is enabled */
 145         void (*cleanup)(void); /* Called when the plugin is disabled */
 146         void (*about)(void); /* Show the about box */
 147         void (*configure)(void); /* Show the configure box */
 148         void (*disable_plugin)(struct _VisPlugin *); /* Call this with a pointer to your plugin to disable the plugin */
 149         void (*playback_start)(void); /* Called when playback starts */
 150         void (*playback_stop)(void); /* Called when playback stops */
 151         void (*render_pcm)(short pcm_data[2][512]); /* Render the PCM data, don't do anything time consuming in here */
 152         void (*render_freq)(short freq_data[2][256]); /* Render the freq data, don't do anything time consuming in here */
 153 } VisPlugin;
 154
 155 #endif