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annotate engine/core/audio/sounddecoder.h @ 46:90005975cdbb

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* Final LGPL switch step by adjusting the file headers * Remaining issues (just slightly related to the unittest switch): * No working unittest solution for msvc2005 yet * Unittests not working with mingw + scons either though this seems hard to impossible to fix without an expert in this field * sample_unit_test.cpp would need to get modified for unittest++; it still contains the old boost unittest code
author mvbarracuda@33b003aa-7bff-0310-803a-e67f0ece8222
date Sun, 13 Jul 2008 11:05:12 +0000
parents 4a0efb7baf70
children 64738befdf3b
rev   line source
0
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1 /***************************************************************************
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2 * Copyright (C) 2005-2008 by the FIFE team *
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3 * http://www.fifengine.de *
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4 * This file is part of FIFE. *
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5 * *
46
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6 * FIFE is free software; you can redistribute it and/or *
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7 * modify it under the terms of the GNU Lesser General Public *
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8 * License as published by the Free Software Foundation; either *
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9 * version 2.1 of the License, or (at your option) any later version. *
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10 * *
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11 * This library is distributed in the hope that it will be useful, *
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12 * but WITHOUT ANY WARRANTY; without even the implied warranty of *
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13 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU *
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14 * Lesser General Public License for more details. *
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15 * *
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16 * You should have received a copy of the GNU Lesser General Public *
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17 * License along with this library; if not, write to the *
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18 * Free Software Foundation, Inc., *
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19 * 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA *
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20 ***************************************************************************/
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21
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22 #ifndef FIFE_SOUNDDECODER_H
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23 #define FIFE_SOUNDDECODER_H
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24
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25 // Standard C++ library includes
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26
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27 // Platform specific includes
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28
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29 // 3rd party library includes
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30
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31 // FIFE includes
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32 // These includes are split up in two parts, separated by one empty line
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33 // First block: files included from the FIFE root src directory
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34 // Second block: files included from the same folder
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35
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36 #include "soundconfig.h"
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37 #include "fife_openal.h"
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38
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39 namespace FIFE {
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40
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41 class SoundDecoder {
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42 public:
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43
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44 virtual ~SoundDecoder() {}
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45
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46 /** Returns the decoded length of the file in bytes
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47 */
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48 virtual unsigned long getDecodedLength() = 0;
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49
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50 /** A stream or not?
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51 *
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52 * The decision if we decode the whole audio file in one buffer or use a
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53 * kind of streaming depends on the value of MAX_KEEP_IN_MEM from
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54 * soundconfig.h
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55 *
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56 * @return Return true for a streaming decoder, false if the sound is
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57 * decoded in one buffer
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58 */
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59 bool needsStreaming() { return getDecodedLength() > MAX_KEEP_IN_MEM; }
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60
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61 /** Sets the current position in the file (in bytes)
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62 *
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63 * @return 0 (False), if the positioning was successful
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64 */
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65 virtual bool setCursor(unsigned long pos) = 0;
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66
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67 /** Request the decoding of the next part of the stream.
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68 *
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69 * @param length The length of the decoded part
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70 * @return 0 (False), if decoding was successful
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71 */
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72 virtual bool decode(unsigned long length) = 0;
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73
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74 /** Returns the next decoded buffer.
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75 *
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76 * The length of the buffer is returned by getBufferSize().
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77 */
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78 virtual void *getBuffer() = 0;
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79
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80 /** Returns the byte-size of the buffer returned by getBuffer().
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81 */
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82 virtual unsigned long getBufferSize() = 0;
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83
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84 /** Releases the buffer returned by getBuffer()
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85 */
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86 virtual void releaseBuffer() = 0;
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87
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88 /** Tests if the audio data is stereo data or mono.
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89 *
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90 * @return Returns true if the audio data is stereo, false if mono.
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91 */
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92 bool isStereo() {
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93 return m_isstereo;
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94 }
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95
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96 /** Returns the openAL-Format of the audio file
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97 */
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98 ALenum getALFormat() {
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99 if (m_isstereo) {
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100 return m_is8bit ? AL_FORMAT_STEREO8 : AL_FORMAT_STEREO16;
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101 } else {
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102 return m_is8bit ? AL_FORMAT_MONO8 : AL_FORMAT_MONO16;
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103 }
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104 }
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105
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106 /** Returns the bit resolution
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107 */
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108 short getBitResolution() {
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109 return m_is8bit ? 8 : 16;
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110 }
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111
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112 /** Returns the sample rate
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113 */
4a0efb7baf70 * Datasets becomes the new trunk and retires after that :-)
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114 unsigned long getSampleRate() {
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115 return m_samplerate;
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116 }
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117
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118 protected:
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119 bool m_isstereo;
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120 bool m_is8bit;
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121 unsigned long m_samplerate;
4a0efb7baf70 * Datasets becomes the new trunk and retires after that :-)
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122 };
4a0efb7baf70 * Datasets becomes the new trunk and retires after that :-)
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123 }
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124
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125 #endif