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source: orxonox.OLD/trunk/src/lib/sound/sound_buffer.cc @ 8190

Last change on this file since 8190 was 7460, checked in by bensch, 19 years ago

orxonox/trunk: Namespaces for sound

File size: 2.7 KB
Line 
1/*
2   orxonox - the future of 3D-vertical-scrollers
3
4   Copyright (C) 2004 orx
5
6   This program is free software; you can redistribute it and/or modify
7   it under the terms of the GNU General Public License as published by
8   the Free Software Foundation; either version 2, or (at your option)
9   any later version.
10
11   ### File Specific:
12   main-programmer: Benjamin Grauer
13   co-programmer: ...
14*/
15
16#define DEBUG_SPECIAL_MODULE DEBUG_MODULE_SOUND
17
18#include "sound_buffer.h"
19
20#include "sound_engine.h"
21
22#include "sdlincl.h"
23#include <cassert>
24
25namespace OrxSound
26{
27  //////////////////
28  /* SOUND-BUFFER */
29  //////////////////
30  /**
31   *  Creates a Soundbuffer out of an inputfile
32   * @param fileName The name of the File
33   */
34  SoundBuffer::SoundBuffer(const std::string& fileName)
35  {
36    this->setClassID(CL_SOUND_BUFFER, "SoundBuffer");
37    this->setName(fileName);
38
39    // generate a Buffer
40    alGenBuffers(1, &this->bufferID);
41    SoundEngine::checkError("Generate Buffer", __LINE__);
42    this->loadWAV(fileName);
43  }
44
45  SoundBuffer::~SoundBuffer()
46  {
47    //  SoundEngine::getInstance()->removeBuffer(this);
48    alDeleteBuffers(1, &this->bufferID);
49    SoundEngine::checkError("SoundBuffer: Delete Buffer", __LINE__);
50  }
51
52  /**
53   * @brief loads a Waveform from the local fileSystem into this Source.
54   * @param fileName the Name of the File to Load.
55   * @returns true on success.
56   */
57  bool SoundBuffer::loadWAV(const std::string& fileName)
58  {
59    SDL_AudioSpec wavSpec;
60    Uint32 wavLength;
61    Uint8 *wavBuffer;
62
63    /* Load the WAV */
64    if( SDL_LoadWAV(fileName.c_str(), &wavSpec, &wavBuffer, &wavLength) == NULL)
65    {
66      PRINTF(2)("Could not open %s: %s\n", fileName.c_str(), SDL_GetError());
67      return false;
68    }
69
70    alBufferData(this->bufferID, SoundBuffer::sdlAudioSpecToAlFormat(&wavSpec), wavBuffer, wavLength, wavSpec.freq);
71    SDL_FreeWAV(wavBuffer);
72    if (SoundEngine::checkError("Could not load Wave file", __LINE__))
73      return true;
74    else
75      return false;
76  }
77
78  /**
79   * @brief converts an SDL_AudioSpec into a valid OpenAL AUDIO_FORMAT enumerator
80   * @param audiospec the AudioSpec to convert.
81   * @returns the AL_FORMAT
82   */
83  ALenum SoundBuffer::sdlAudioSpecToAlFormat(const SDL_AudioSpec* audiospec)
84  {
85    assert (audiospec != NULL);
86    bool stereo = true;
87    bool is16Bit = true;
88    if (audiospec->format == AUDIO_U8 || audiospec->format == AUDIO_S8)
89      is16Bit = false;
90    if (audiospec->channels == 1)
91      stereo = false;
92
93    if (!stereo && !is16Bit)
94      return AL_FORMAT_MONO8;
95    else if (!stereo && is16Bit)
96      return AL_FORMAT_MONO16;
97    else if (stereo && !is16Bit)
98      return AL_FORMAT_STEREO8;
99    else if (stereo && is16Bit)
100      return AL_FORMAT_STEREO16;
101  }
102}
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