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