1 | /* -*- mode: C; tab-width:8; c-basic-offset:8 -*- |
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2 | * vi:set ts=8: |
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3 | * |
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4 | * al_ext_vorbis.c |
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5 | * |
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6 | * Temporary hack. |
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7 | */ |
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8 | #include "al_siteconfig.h" |
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9 | |
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10 | #include <AL/al.h> |
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11 | |
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12 | /* for alutLoadVorbis_LOKI */ |
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13 | #include "AL/alext.h" |
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14 | |
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15 | #include <stdio.h> |
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16 | #include <stdlib.h> |
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17 | #include <string.h> |
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18 | |
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19 | #include "al_ext_needed.h" |
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20 | #include "al_ext_vorbis.h" |
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21 | |
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22 | #include "al_buffer.h" |
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23 | #include "al_ext.h" |
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24 | |
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25 | #include "alc/alc_context.h" |
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26 | |
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27 | #define MAX_VORBIS 64 |
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28 | |
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29 | #ifdef ENABLE_EXTENSION_AL_EXT_VORBIS |
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30 | #include <vorbis/vorbisfile.h> |
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31 | |
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32 | #ifdef OPENAL_DLOPEN_VORBIS |
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33 | #include <dlfcn.h> |
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34 | #endif |
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35 | |
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36 | |
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37 | static size_t ovfd_read(void *ptr, size_t size, size_t nmemb, void *datasource); |
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38 | static int ovfd_seek(void *datasource, int64_t offset, int whence); |
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39 | static int ovfd_close(void *datasource); |
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40 | static long ovfd_tell(void *datasource); |
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41 | |
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42 | typedef struct { |
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43 | OggVorbis_File of; |
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44 | |
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45 | void *data; |
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46 | |
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47 | struct { |
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48 | int size; |
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49 | int offset; /* set by the source */ |
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50 | } fh; |
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51 | } VorbHandle; |
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52 | |
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53 | static ov_callbacks ov_fromdata = { |
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54 | ovfd_read, |
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55 | ovfd_seek, |
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56 | ovfd_close, |
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57 | ovfd_tell |
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58 | }; |
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59 | |
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60 | /* maximum MAX_VORBIS simultaneous sid/offset */ |
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61 | static struct { |
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62 | ALuint bid; |
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63 | VorbHandle *vorb; |
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64 | } vorbid[MAX_VORBIS]; |
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65 | |
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66 | static struct { |
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67 | ALuint sid; |
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68 | ALuint offset; |
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69 | ALint current_section; |
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70 | } vorbmap[MAX_VORBIS]; |
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71 | |
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72 | #ifdef OPENAL_EXTENSION |
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73 | |
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74 | /* |
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75 | * we are not being build into the library, therefore define the |
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76 | * table that informs openal how to register the extensions upon |
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77 | * dlopen. |
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78 | */ |
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79 | struct { ALubyte *name; void *addr; } alExtension_03282000 [] = { |
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80 | AL_EXT_PAIR(alutLoadVorbis_LOKI), |
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81 | { NULL, NULL } |
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82 | }; |
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83 | |
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84 | void alExtInit_03282000(void) { |
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85 | int i; |
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86 | |
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87 | for(i = 0; i < MAX_VORBIS; i++) { |
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88 | vorbmap[i].sid = 0; |
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89 | vorbmap[i].offset = 0; |
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90 | |
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91 | vorbid[i].bid = 0; |
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92 | vorbid[i].vorbis = NULL; |
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93 | } |
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94 | |
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95 | return; |
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96 | } |
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97 | |
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98 | void alExtFini_03282000(void) { |
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99 | int i; |
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100 | |
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101 | fprintf(stderr, "alExtFini_03282000 STUB\n"); |
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102 | |
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103 | for(i = 0; i < MAX_VORBIS; i++) { |
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104 | if(vorbid[i].vorbis != NULL) { |
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105 | /* Do something */ |
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106 | } |
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107 | } |
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108 | |
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109 | return; |
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110 | } |
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111 | |
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112 | #endif |
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113 | |
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114 | static int signed_format(ALenum format); |
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115 | |
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116 | static void VorbHandle_delete(VorbHandle *vorb); |
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117 | |
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118 | static int vorbid_get(ALuint bid, VorbHandle **vorbp); |
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119 | static int vorbid_insert(ALuint bid, VorbHandle *vorb); |
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120 | static void vorbid_remove(ALuint bid); |
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121 | |
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122 | static int vorbmap_get(ALuint sid, ALuint *offset, ALint *current_section); |
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123 | static int vorbmap_insert(ALuint sid); |
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124 | static void vorbmap_update(int i, ALuint offset, ALint current_section); |
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125 | static void vorbmap_remove(ALuint sid); |
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126 | |
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127 | |
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128 | static int openal_load_vorbisfile_library(void); |
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129 | |
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130 | /* |
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131 | * vorbisfile library functions. |
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132 | */ |
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133 | static int (*pov_clear)(OggVorbis_File *vf); |
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134 | static int (*pov_open_callbacks)(void *datasource, OggVorbis_File *vf, |
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135 | char *initial, long ibytes, ov_callbacks callbacks); |
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136 | static vorbis_info* (*pov_info)(OggVorbis_File *vf,int link); |
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137 | static long (*pov_read)(OggVorbis_File *vf,char *buffer,int length, |
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138 | int bigendianp,int word,int sgned,int *bitstream); |
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139 | |
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140 | /* |
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141 | * vorbisfile library handle. |
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142 | */ |
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143 | static void * vorbisfile_lib_handle = NULL; |
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144 | |
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145 | static int openal_load_vorbisfile_library(void) |
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146 | { |
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147 | #ifdef OPENAL_DLOPEN_VORBIS |
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148 | char * error = NULL; |
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149 | #endif |
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150 | |
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151 | if (vorbisfile_lib_handle != NULL) |
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152 | return 1; /* already loaded. */ |
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153 | |
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154 | #ifdef OPENAL_DLOPEN_VORBIS |
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155 | #define OPENAL_LOAD_VORBISFILE_SYMBOL(x) p##x = dlsym(vorbisfile_lib_handle, #x); \ |
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156 | error = dlerror(); \ |
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157 | if (p##x == NULL) { \ |
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158 | fprintf(stderr,"Could not resolve vorbisfile symbol %s: %s\n", #x, ((error!=NULL)?(error):("(null)"))); \ |
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159 | dlclose(vorbisfile_lib_handle); vorbisfile_lib_handle = NULL; \ |
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160 | return 0; } |
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161 | dlerror(); /* clear error state */ |
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162 | vorbisfile_lib_handle = dlopen("libvorbisfile.so", RTLD_LAZY | RTLD_GLOBAL); |
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163 | error = dlerror(); |
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164 | if (vorbisfile_lib_handle == NULL) { |
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165 | fprintf(stderr,"Could not open vorbisfile library: %s\n",((error!=NULL)?(error):("(null)"))); |
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166 | return 0; |
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167 | } |
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168 | #else |
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169 | #define OPENAL_LOAD_VORBISFILE_SYMBOL(x) p##x = x; |
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170 | vorbisfile_lib_handle = (void *) 0xF00DF00D; |
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171 | #endif |
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172 | |
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173 | OPENAL_LOAD_VORBISFILE_SYMBOL(ov_clear); |
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174 | OPENAL_LOAD_VORBISFILE_SYMBOL(ov_open_callbacks); |
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175 | OPENAL_LOAD_VORBISFILE_SYMBOL(ov_info); |
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176 | OPENAL_LOAD_VORBISFILE_SYMBOL(ov_read); |
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177 | |
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178 | return 1; |
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179 | } |
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180 | |
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181 | |
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182 | ALboolean alutLoadVorbis_LOKI(ALuint bid, |
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183 | const ALvoid *data, |
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184 | ALint size) { |
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185 | static void (*palBufferi_LOKI)(ALuint, ALenum, ALint) = NULL; |
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186 | VorbHandle *vorb; |
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187 | int err; |
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188 | vorbis_info *vi; |
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189 | |
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190 | if(palBufferi_LOKI == NULL) { |
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191 | palBufferi_LOKI = (void (*)(ALuint, ALenum, ALint)) |
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192 | alGetProcAddress((const ALchar *) "alBufferi_LOKI"); |
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193 | |
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194 | if(palBufferi_LOKI == NULL) { |
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195 | fprintf(stderr, "Need alBufferi_LOKI\n"); |
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196 | return AL_FALSE; |
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197 | } |
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198 | |
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199 | if (!openal_load_vorbisfile_library()) |
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200 | return AL_FALSE; |
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201 | } |
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202 | |
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203 | vorb = malloc(sizeof *vorb); |
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204 | if(vorb == NULL) { |
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205 | fprintf(stderr, "vorbis problems\n"); |
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206 | |
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207 | return AL_FALSE; |
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208 | } |
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209 | |
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210 | vorb->data = malloc(size); |
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211 | if(vorb->data == NULL) { |
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212 | fprintf(stderr, "vorbis out of memory \n"); |
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213 | free(vorb); |
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214 | return AL_FALSE; |
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215 | } |
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216 | |
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217 | memcpy(vorb->data, data, size); |
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218 | |
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219 | vorb->fh.offset = 0; |
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220 | vorb->fh.size = size; |
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221 | |
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222 | /* NOTE: Ogg Vorbis' header are not const-correct, so we get a warning for "data" below! */ |
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223 | err = pov_open_callbacks(vorb, &vorb->of, data, size, ov_fromdata); |
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224 | if(err < 0) { |
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225 | fprintf(stderr, "vorbis problems\n"); |
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226 | free(vorb->data); |
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227 | free(vorb); |
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228 | return AL_FALSE; |
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229 | } |
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230 | |
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231 | /* set multi channel stuff */ |
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232 | vi = pov_info(&vorb->of, 0); |
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233 | if(vi != NULL) { |
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234 | palBufferi_LOKI(bid, AL_CHANNELS, vi->channels); |
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235 | } |
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236 | |
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237 | /* insert new bid */ |
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238 | vorbid_insert(bid, vorb); |
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239 | |
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240 | _alBufferDataWithCallback_LOKI(bid, |
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241 | Vorbis_Callback, |
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242 | vorbmap_remove, |
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243 | vorbid_remove); |
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244 | |
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245 | return AL_TRUE; |
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246 | } |
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247 | |
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248 | |
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249 | ALint Vorbis_Callback(UNUSED(ALuint sid), |
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250 | ALuint bid, |
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251 | ALshort *outdata, |
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252 | ALenum format, |
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253 | UNUSED(ALint freq), |
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254 | ALint samples) { |
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255 | VorbHandle *vorb; |
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256 | int index; |
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257 | ALuint offset; |
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258 | long ret = 0; |
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259 | int bps = _alGetBitsFromFormat(format)>>3; /* bytes per sample */ |
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260 | int bytesToRead = samples * bps; |
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261 | ALint current_section; |
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262 | ALint retval = 0; |
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263 | char *datap; |
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264 | |
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265 | datap = (char *) outdata; |
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266 | |
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267 | index = vorbid_get(bid, &vorb); |
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268 | if(index == -1) { |
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269 | fprintf(stderr, "weird vorbid_get\n"); |
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270 | return -1; |
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271 | } |
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272 | |
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273 | index = vorbmap_get(sid, &offset, ¤t_section); |
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274 | if(index == -1) { |
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275 | /* first time */ |
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276 | index = vorbmap_insert(sid); |
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277 | |
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278 | offset = 0; |
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279 | current_section = 0; |
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280 | } |
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281 | |
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282 | vorb->fh.offset = offset; /* set per sid offset */ |
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283 | |
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284 | while(bytesToRead > 0) { |
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285 | /* FIXME: handle format differences etc |
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286 | * |
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287 | * should be below VDRATB now */ |
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288 | ret = pov_read(&vorb->of, |
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289 | datap, |
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290 | bytesToRead, |
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291 | #ifdef WORDS_BIGENDIAN |
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292 | 1, |
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293 | #else |
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294 | 0, |
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295 | #endif |
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296 | bps, |
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297 | signed_format(format), |
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298 | ¤t_section); |
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299 | |
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300 | if(ret == OV_HOLE) |
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301 | continue; |
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302 | |
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303 | if(ret <= 0) { |
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304 | /* eof or error */ |
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305 | vorbmap_update(index, 0, 0); |
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306 | return 0; |
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307 | } |
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308 | |
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309 | bytesToRead -= ret; |
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310 | retval += ret; |
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311 | datap += ret; |
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312 | } |
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313 | |
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314 | vorbmap_update(index, vorb->fh.offset, current_section); |
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315 | |
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316 | return retval / bps; |
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317 | } |
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318 | |
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319 | static int vorbid_get(ALuint bid, VorbHandle **vorbp) { |
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320 | int i; |
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321 | |
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322 | for(i = 0; i < MAX_VORBIS; i++) { |
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323 | if(vorbid[i].bid == bid) { |
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324 | *vorbp = vorbid[i].vorb; |
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325 | |
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326 | return i; |
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327 | } |
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328 | } |
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329 | |
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330 | return -1; |
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331 | } |
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332 | |
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333 | static int vorbid_insert(ALuint bid, VorbHandle *vorb) { |
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334 | int i; |
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335 | |
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336 | for(i = 0; i < MAX_VORBIS; i++) { |
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337 | if(vorbid[i].bid == bid) { |
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338 | if(vorbid[i].vorb != NULL) { |
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339 | VorbHandle_delete(vorbid[i].vorb); |
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340 | vorbid[i].vorb = NULL; |
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341 | } |
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342 | |
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343 | vorbid[i].bid = 0; /* flag for next */ |
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344 | } |
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345 | |
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346 | if(vorbid[i].bid == 0) { |
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347 | vorbid[i].bid = bid; |
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348 | vorbid[i].vorb = vorb; |
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349 | |
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350 | return i; |
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351 | } |
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352 | } |
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353 | |
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354 | return 0; |
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355 | } |
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356 | |
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357 | static void vorbid_remove(ALuint bid) { |
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358 | int i = 0; |
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359 | |
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360 | for(i = 0; i < MAX_VORBIS; i++) { |
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361 | if(vorbid[i].bid == (ALuint) bid) { |
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362 | if(vorbid[i].vorb != NULL) { |
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363 | VorbHandle_delete(vorbid[i].vorb); |
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364 | vorbid[i].vorb = NULL; |
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365 | } |
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366 | |
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367 | vorbid[i].bid = 0; |
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368 | return; |
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369 | } |
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370 | } |
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371 | |
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372 | return; |
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373 | } |
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374 | |
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375 | /* FIXME: make binary search */ |
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376 | static int vorbmap_get(ALuint sid, ALuint *offset, ALint *current_section) { |
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377 | int i; |
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378 | |
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379 | for(i = 0; i < MAX_VORBIS; i++) { |
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380 | if(vorbmap[i].sid == sid) { |
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381 | *offset = vorbmap[i].offset; |
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382 | *current_section = vorbmap[i].current_section; |
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383 | |
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384 | return i; |
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385 | } |
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386 | } |
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387 | |
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388 | return -1; |
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389 | } |
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390 | |
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391 | /* FIXME: sorted insert for binary search */ |
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392 | static int vorbmap_insert(ALuint sid) { |
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393 | int i; |
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394 | |
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395 | for(i = 0; i < MAX_VORBIS; i++) { |
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396 | if((vorbmap[i].sid == 0) || |
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397 | (vorbmap[i].sid == sid)) { |
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398 | vorbmap[i].sid = sid; |
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399 | vorbmap[i].offset = AL_FALSE; |
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400 | |
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401 | return i; |
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402 | } |
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403 | } |
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404 | |
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405 | return 0; |
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406 | } |
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407 | |
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408 | static void vorbmap_update(int i, ALuint offset, ALint current_section) { |
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409 | if(i < 0) { |
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410 | return; |
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411 | } |
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412 | |
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413 | if(i >= MAX_VORBIS) { |
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414 | return; |
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415 | } |
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416 | |
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417 | vorbmap[i].offset = offset; |
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418 | vorbmap[i].current_section = current_section; |
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419 | |
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420 | return; |
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421 | } |
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422 | |
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423 | static void vorbmap_remove(ALuint sid) { |
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424 | int i; |
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425 | |
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426 | for(i = 0; i < MAX_VORBIS; i++) { |
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427 | if(vorbmap[i].sid == sid) { |
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428 | vorbmap[i].sid = 0; |
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429 | vorbmap[i].offset = AL_FALSE; |
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430 | |
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431 | return; |
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432 | } |
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433 | } |
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434 | |
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435 | return; |
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436 | } |
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437 | |
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438 | static void VorbHandle_delete(VorbHandle *vorb) { |
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439 | pov_clear(&vorb->of); |
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440 | free(vorb->data); |
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441 | free(vorb); |
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442 | |
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443 | return; |
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444 | } |
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445 | |
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446 | static size_t ovfd_read(void *ptr, size_t size, size_t nmemb, void *datasource){ |
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447 | VorbHandle *vb = datasource; |
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448 | int bytesToRead; |
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449 | char *datap; |
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450 | |
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451 | bytesToRead = size * nmemb; |
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452 | datap = vb->data; |
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453 | |
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454 | if(vb->fh.offset >= vb->fh.size) { |
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455 | /* no more reading, we're at the end */ |
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456 | return 0; |
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457 | } |
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458 | |
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459 | if(vb->fh.offset + bytesToRead >= vb->fh.size) { |
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460 | bytesToRead = vb->fh.size - vb->fh.offset; |
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461 | } |
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462 | |
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463 | datap += vb->fh.offset; |
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464 | |
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465 | memcpy(ptr, datap, bytesToRead); |
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466 | |
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467 | vb->fh.offset += bytesToRead; |
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468 | |
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469 | return bytesToRead; |
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470 | } |
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471 | |
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472 | static int ovfd_seek(void *datasource, int64_t offset, int whence) { |
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473 | VorbHandle *vb = datasource; |
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474 | |
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475 | switch(whence) { |
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476 | case SEEK_SET: |
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477 | if(vb->fh.size < offset) { |
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478 | return -1; |
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479 | } |
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480 | vb->fh.offset = offset; |
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481 | break; |
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482 | case SEEK_CUR: |
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483 | if(vb->fh.size < vb->fh.offset + offset) { |
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484 | return -1; |
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485 | } |
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486 | |
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487 | vb->fh.offset += offset; |
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488 | break; |
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489 | case SEEK_END: |
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490 | if(vb->fh.size < vb->fh.size + offset) { |
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491 | return -1; |
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492 | } |
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493 | |
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494 | vb->fh.offset = vb->fh.size + offset; |
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495 | break; |
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496 | } |
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497 | |
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498 | return 0; |
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499 | } |
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500 | |
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501 | static int ovfd_close(void *datasource) { |
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502 | VorbHandle *vb = datasource; |
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503 | |
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504 | vb->fh.offset = 0; |
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505 | |
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506 | return 0; |
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507 | } |
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508 | |
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509 | static long ovfd_tell(void *datasource) { |
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510 | VorbHandle *vb = datasource; |
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511 | |
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512 | return vb->fh.offset; |
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513 | } |
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514 | |
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515 | static int signed_format(ALenum format) { |
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516 | switch(format) { |
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517 | case AL_FORMAT_MONO16: |
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518 | case AL_FORMAT_STEREO16: |
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519 | return 1; |
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520 | break; |
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521 | default: |
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522 | break; |
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523 | } |
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524 | |
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525 | return 0; |
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526 | } |
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527 | |
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528 | #else |
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529 | |
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530 | /* without vorbis support, we don't do jack */ |
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531 | |
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532 | #endif /* ENABLE_EXTENSION_AL_EXT_VORBIS */ |
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