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annotate engine/core/loaders/native/audio_loaders/sounddecoder_ogg.cpp @ 405:cfe2f6db4964

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Reverting my last change to camera.cpp. It caused unexpected results with rotated tiles.
author prock@33b003aa-7bff-0310-803a-e67f0ece8222
date Fri, 29 Jan 2010 15:55:47 +0000
parents 90005975cdbb
children
rev   line source
0
4a0efb7baf70 * Datasets becomes the new trunk and retires after that :-)
mvbarracuda@33b003aa-7bff-0310-803a-e67f0ece8222
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1 /***************************************************************************
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mvbarracuda@33b003aa-7bff-0310-803a-e67f0ece8222
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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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mvbarracuda@33b003aa-7bff-0310-803a-e67f0ece8222
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4 * This file is part of FIFE. *
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5 * *
46
90005975cdbb * Final LGPL switch step by adjusting the file headers
mvbarracuda@33b003aa-7bff-0310-803a-e67f0ece8222
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6 * FIFE is free software; you can redistribute it and/or *
90005975cdbb * Final LGPL switch step by adjusting the file headers
mvbarracuda@33b003aa-7bff-0310-803a-e67f0ece8222
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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 * *
46
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mvbarracuda@33b003aa-7bff-0310-803a-e67f0ece8222
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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 *
90005975cdbb * Final LGPL switch step by adjusting the file headers
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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 *
90005975cdbb * Final LGPL switch step by adjusting the file headers
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17 * License along with this library; if not, write to the *
0
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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) {
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106 int stream = 0;
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107 int ret = 0;
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108
4a0efb7baf70 * Datasets becomes the new trunk and retires after that :-)
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
parents:
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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 :-)
mvbarracuda@33b003aa-7bff-0310-803a-e67f0ece8222
parents:
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112
4a0efb7baf70 * Datasets becomes the new trunk and retires after that :-)
mvbarracuda@33b003aa-7bff-0310-803a-e67f0ece8222
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113 // decode the stream
4a0efb7baf70 * Datasets becomes the new trunk and retires after that :-)
mvbarracuda@33b003aa-7bff-0310-803a-e67f0ece8222
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114 m_datasize = 0;
4a0efb7baf70 * Datasets becomes the new trunk and retires after that :-)
mvbarracuda@33b003aa-7bff-0310-803a-e67f0ece8222
parents:
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115 do {
4a0efb7baf70 * Datasets becomes the new trunk and retires after that :-)
mvbarracuda@33b003aa-7bff-0310-803a-e67f0ece8222
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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
parents:
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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
parents:
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118 if (ret > 0) {
4a0efb7baf70 * Datasets becomes the new trunk and retires after that :-)
mvbarracuda@33b003aa-7bff-0310-803a-e67f0ece8222
parents:
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119 m_datasize += ret;
4a0efb7baf70 * Datasets becomes the new trunk and retires after that :-)
mvbarracuda@33b003aa-7bff-0310-803a-e67f0ece8222
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120 }
4a0efb7baf70 * Datasets becomes the new trunk and retires after that :-)
mvbarracuda@33b003aa-7bff-0310-803a-e67f0ece8222
parents:
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121
4a0efb7baf70 * Datasets becomes the new trunk and retires after that :-)
mvbarracuda@33b003aa-7bff-0310-803a-e67f0ece8222
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122 } while (length-m_datasize > 0 && ret > 0);
4a0efb7baf70 * Datasets becomes the new trunk and retires after that :-)
mvbarracuda@33b003aa-7bff-0310-803a-e67f0ece8222
parents:
diff changeset
123
4a0efb7baf70 * Datasets becomes the new trunk and retires after that :-)
mvbarracuda@33b003aa-7bff-0310-803a-e67f0ece8222
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124 return m_datasize == 0;
4a0efb7baf70 * Datasets becomes the new trunk and retires after that :-)
mvbarracuda@33b003aa-7bff-0310-803a-e67f0ece8222
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125 }
4a0efb7baf70 * Datasets becomes the new trunk and retires after that :-)
mvbarracuda@33b003aa-7bff-0310-803a-e67f0ece8222
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126
4a0efb7baf70 * Datasets becomes the new trunk and retires after that :-)
mvbarracuda@33b003aa-7bff-0310-803a-e67f0ece8222
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127 bool SoundDecoderOgg::setCursor(unsigned long pos) {
4a0efb7baf70 * Datasets becomes the new trunk and retires after that :-)
mvbarracuda@33b003aa-7bff-0310-803a-e67f0ece8222
parents:
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128
4a0efb7baf70 * Datasets becomes the new trunk and retires after that :-)
mvbarracuda@33b003aa-7bff-0310-803a-e67f0ece8222
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129 if (ov_pcm_seek(&m_ovf, pos / ((m_isstereo ? 2 : 1) * 2)) == 0) {
4a0efb7baf70 * Datasets becomes the new trunk and retires after that :-)
mvbarracuda@33b003aa-7bff-0310-803a-e67f0ece8222
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130 return true;
4a0efb7baf70 * Datasets becomes the new trunk and retires after that :-)
mvbarracuda@33b003aa-7bff-0310-803a-e67f0ece8222
parents:
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131 }
4a0efb7baf70 * Datasets becomes the new trunk and retires after that :-)
mvbarracuda@33b003aa-7bff-0310-803a-e67f0ece8222
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132 return false;
4a0efb7baf70 * Datasets becomes the new trunk and retires after that :-)
mvbarracuda@33b003aa-7bff-0310-803a-e67f0ece8222
parents:
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133 }
4a0efb7baf70 * Datasets becomes the new trunk and retires after that :-)
mvbarracuda@33b003aa-7bff-0310-803a-e67f0ece8222
parents:
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134 }