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annotate engine/core/loaders/native/audio_loaders/sounddecoder_ogg.cpp @ 697:ecaa4d98f05f tip

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Abstracted the GUI code and refactored the GUIChan-specific code into its own module. * Most of the GUIChan code has been refactored into its own gui/guichan module. However, references to the GuiFont class still persist in the Engine and GuiManager code and these will need further refactoring. * GuiManager is now an abstract base class which specific implementations (e.g. GUIChan) should subclass. * The GUIChan GUI code is now a concrete implementation of GuiManager, most of which is in the new GuiChanGuiManager class. * The GUI code in the Console class has been refactored out of the Console and into the GUIChan module as its own GuiChanConsoleWidget class. The rest of the Console class related to executing commands was left largely unchanged. * Existing client code may need to downcast the GuiManager pointer received from FIFE::Engine::getGuiManager() to GuiChanGuiManager, since not all functionality is represented in the GuiManager abstract base class. Python client code can use the new GuiChanGuiManager.castTo static method for this purpose.
author M. George Hansen <technopolitica@gmail.com>
date Sat, 18 Jun 2011 00:28:40 -1000
parents 90005975cdbb
children
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. *
0
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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. *
0
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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 // Standard C++ library includes
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23
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24 // Platform specific includes
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25
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26 // 3rd party library includes
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27
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28 // FIFE includes
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29 // These includes are split up in two parts, separated by one empty line
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30 // First block: files included from the FIFE root src directory
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31 // Second block: files included from the same folder
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32 #include "util/log/logger.h"
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33 #include "util/base/exception.h"
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34
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35 #include "sounddecoder_ogg.h"
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36
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37 namespace FIFE {
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38 static Logger _log(LM_AUDIO);
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39
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40 /* OggVorbis Callback functions
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41 */
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42 namespace OGG_cb {
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43 static size_t read(void *ptr, size_t size, size_t nmemb, void *datasource) {
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44 RawData* rdp = reinterpret_cast<RawData*>(datasource);
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45 size_t restlen = rdp->getDataLength()-rdp->getCurrentIndex();
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46 size_t len = (restlen<=size*nmemb)?restlen:size*nmemb;
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47 if (len) {
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48 rdp->readInto(reinterpret_cast<uint8_t *>(ptr), len);
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49 }
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50 return len;
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51 }
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52
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53 static int seek(void *datasource, ogg_int64_t offset, int whence) {
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54 RawData* rdp = reinterpret_cast<RawData*>(datasource);
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55 switch (whence) {
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56 case SEEK_SET:
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57 (*rdp).setIndex(offset);
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58 return 0;
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59 case SEEK_CUR:
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60 (*rdp).moveIndex(offset);
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61 return 0;
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62 case SEEK_END:
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63 (*rdp).setIndex( (*rdp).getDataLength() -1 + offset);
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64 return 0;
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65 }
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66 return -1;
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67 }
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68
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69 static int close(void *datasource) { return 0; }
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70
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71 static long tell(void *datasource) {
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72 RawData* rdp = reinterpret_cast<RawData*>(datasource);
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73 return (*rdp).getCurrentIndex();
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74 }
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75 }
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76
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77 SoundDecoderOgg::SoundDecoderOgg(RawData* rdp) : m_file(rdp) {
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78
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79 ov_callbacks ocb = {
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80 OGG_cb::read, OGG_cb::seek, OGG_cb::close, OGG_cb::tell
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81 };
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82
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83 if (0 > ov_open_callbacks(m_file.get(), &m_ovf, 0, 0, ocb)) {
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84 throw InvalidFormat("Error opening OggVorbis file");
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85 }
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86
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87
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88 vorbis_info *vi = ov_info(&m_ovf, -1);
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89 if (!vi) {
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90 throw InvalidFormat("Error fetching OggVorbis info");
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91 }
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92
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93 if (!ov_seekable(&m_ovf)) {
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94 throw InvalidFormat("OggVorbis file has to be seekable");
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95 }
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96
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97 m_isstereo = vi->channels == 2;
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98 m_samplerate = vi->rate;
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99 m_is8bit = false;
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100 m_declength = (m_isstereo ? 2 : 1) * 2 * ov_pcm_total(&m_ovf, -1);
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101 m_datasize = 0;
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102 m_data = NULL;
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103 }
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104
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105 bool SoundDecoderOgg::decode(unsigned long length) {
4a0efb7baf70 * Datasets becomes the new trunk and retires after that :-)
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106 int stream = 0;
4a0efb7baf70 * Datasets becomes the new trunk and retires after that :-)
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107 int ret = 0;
4a0efb7baf70 * Datasets becomes the new trunk and retires after that :-)
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108
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mvbarracuda@33b003aa-7bff-0310-803a-e67f0ece8222
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109 // release buffer and allocate new memory
4a0efb7baf70 * Datasets becomes the new trunk and retires after that :-)
mvbarracuda@33b003aa-7bff-0310-803a-e67f0ece8222
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110 releaseBuffer();
4a0efb7baf70 * Datasets becomes the new trunk and retires after that :-)
mvbarracuda@33b003aa-7bff-0310-803a-e67f0ece8222
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111 m_data = new char[length];
4a0efb7baf70 * Datasets becomes the new trunk and retires after that :-)
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112
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mvbarracuda@33b003aa-7bff-0310-803a-e67f0ece8222
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113 // decode the stream
4a0efb7baf70 * Datasets becomes the new trunk and retires after that :-)
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114 m_datasize = 0;
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115 do {
4a0efb7baf70 * Datasets becomes the new trunk and retires after that :-)
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116 ret = ov_read(&m_ovf, m_data + m_datasize,
4a0efb7baf70 * Datasets becomes the new trunk and retires after that :-)
mvbarracuda@33b003aa-7bff-0310-803a-e67f0ece8222
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117 length-m_datasize, 0, 2, 1, &stream);
4a0efb7baf70 * Datasets becomes the new trunk and retires after that :-)
mvbarracuda@33b003aa-7bff-0310-803a-e67f0ece8222
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118 if (ret > 0) {
4a0efb7baf70 * Datasets becomes the new trunk and retires after that :-)
mvbarracuda@33b003aa-7bff-0310-803a-e67f0ece8222
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119 m_datasize += ret;
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120 }
4a0efb7baf70 * Datasets becomes the new trunk and retires after that :-)
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121
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122 } while (length-m_datasize > 0 && ret > 0);
4a0efb7baf70 * Datasets becomes the new trunk and retires after that :-)
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123
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124 return m_datasize == 0;
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125 }
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126
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mvbarracuda@33b003aa-7bff-0310-803a-e67f0ece8222
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127 bool SoundDecoderOgg::setCursor(unsigned long pos) {
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128
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mvbarracuda@33b003aa-7bff-0310-803a-e67f0ece8222
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129 if (ov_pcm_seek(&m_ovf, pos / ((m_isstereo ? 2 : 1) * 2)) == 0) {
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130 return true;
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131 }
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132 return false;
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133 }
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134 }