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  1. /*
  2.   SDL_mixer:  An audio mixer library based on the SDL library
  3.   Copyright (C) 1997-2012 Sam Lantinga <slouken@libsdl.org>
  4.  
  5.   This software is provided 'as-is', without any express or implied
  6.   warranty.  In no event will the authors be held liable for any damages
  7.   arising from the use of this software.
  8.  
  9.   Permission is granted to anyone to use this software for any purpose,
  10.   including commercial applications, and to alter it and redistribute it
  11.   freely, subject to the following restrictions:
  12.  
  13.   1. The origin of this software must not be misrepresented; you must not
  14.      claim that you wrote the original software. If you use this software
  15.      in a product, an acknowledgment in the product documentation would be
  16.      appreciated but is not required.
  17.   2. Altered source versions must be plainly marked as such, and must not be
  18.      misrepresented as being the original software.
  19.   3. This notice may not be removed or altered from any source distribution.
  20. */
  21.  
  22. /* $Id$ */
  23.  
  24. /* This file supports streaming WAV files, without volume adjustment */
  25.  
  26. #include <stdio.h>
  27.  
  28. typedef struct {
  29.         SDL_RWops *rw;
  30.         SDL_bool freerw;
  31.         long  start;
  32.         long  stop;
  33.         SDL_AudioCVT cvt;
  34. } WAVStream;
  35.  
  36. /* Initialize the WAVStream player, with the given mixer settings
  37.    This function returns 0, or -1 if there was an error.
  38.  */
  39. extern int WAVStream_Init(SDL_AudioSpec *mixer);
  40.  
  41. /* Unimplemented */
  42. extern void WAVStream_SetVolume(int volume);
  43.  
  44. /* Load a WAV stream from an SDL_RWops object */
  45. extern WAVStream *WAVStream_LoadSong_RW(SDL_RWops *rw, const char *magic, int freerw);
  46.  
  47. /* Start playback of a given WAV stream */
  48. extern void WAVStream_Start(WAVStream *wave);
  49.  
  50. /* Play some of a stream previously started with WAVStream_Start() */
  51. extern int WAVStream_PlaySome(Uint8 *stream, int len);
  52.  
  53. /* Stop playback of a stream previously started with WAVStream_Start() */
  54. extern void WAVStream_Stop(void);
  55.  
  56. /* Close the given WAV stream */
  57. extern void WAVStream_FreeSong(WAVStream *wave);
  58.  
  59. /* Return non-zero if a stream is currently playing */
  60. extern int WAVStream_Active(void);
  61.