stream.inc

来自「著名的游戏开发库Allegro4.2.0 for DELPHI」· INC 代码 · 共 46 行

{*         ______   ___    ___
 *        /\  _  \ /\_ \  /\_ \
 *        \ \ \L\ \\//\ \ \//\ \      __     __   _ __   ___
 *         \ \  __ \ \ \ \  \ \ \   /'__`\ /'_ `\/\`'__\/ __`\
 *          \ \ \/\ \ \_\ \_ \_\ \_/\  __//\ \L\ \ \ \//\ \L\ \
 *           \ \_\ \_\/\____\/\____\ \____\ \____ \ \_\\ \____/
 *            \/_/\/_/\/____/\/____/\/____/\/___L\ \/_/ \/___/
 *                                           /\____/
 *                                           \_/__/
 *
 *      Streaming sound routines.
 *
 *      By Shawn Hargreaves.
 *
 *      See readme.txt for copyright information.
 *}
{$IFDEF ALLEGRO_INTERFACE}
type
  P_AUDIOSTREAM = ^AUDIOSTREAM;
  AUDIOSTREAM = record
    voice     : sint32;                // the voice we are playing on
    sampe     : P_SAMPLE;              // the sample we are using
    len       : sint32;                // buffer length
    bufcount  : sint32;                // number of buffers per sample half
    bufnum    : sint32;                // current refill buffer
    active    : sint32;                // which half is currently playing
    locked    : Pointer;               // the locked buffer 
  end;

var
  play_audio_stream: function(len, bits: sint32; stereo: Boolean; freq, vol, pan: sint32): P_AUDIOSTREAM; cdecl;
  stop_audio_stream: procedure(stream: P_AUDIOSTREAM); cdecl;
  get_audio_stream_buffer: function(stream: P_AUDIOSTREAM): Pointer; cdecl;
  free_audio_stream_buffer: procedure(stream: P_AUDIOSTREAM); cdecl;
{$ENDIF ALLEGRO_INTERFACE}
{$IFDEF ALLEGRO_IMPLEMENTATION}
{$ENDIF ALLEGRO_IMPLEMENTATION}
{$IFDEF ALLEGRO_LOADVARIABLE}
  play_audio_stream        := LoadDLL('play_audio_stream');
  stop_audio_stream        := LoadDLL('stop_audio_stream');
  get_audio_stream_buffer  := LoadDLL('get_audio_stream_buffer');
  free_audio_stream_buffer := LoadDLL('free_audio_stream_buffer');
{$ENDIF ALLEGRO_LOADVARIABLE}