Mercurial > SDL_sound_CoreAudio
annotate SDL_sound.c @ 246:170b1400e060
Cast to prevent pointer arithmatic on a (void *).
| author | Ryan C. Gordon <icculus@icculus.org> |
|---|---|
| date | Tue, 05 Feb 2002 19:00:39 +0000 |
| parents | ceadd952319a |
| children | 6fe6de401b63 |
| rev | line source |
|---|---|
| 4 | 1 /* |
| 2 * SDL_sound -- An abstract sound format decoding API. | |
| 3 * Copyright (C) 2001 Ryan C. Gordon. | |
| 4 * | |
| 5 * This library is free software; you can redistribute it and/or | |
| 6 * modify it under the terms of the GNU Lesser General Public | |
| 7 * License as published by the Free Software Foundation; either | |
| 8 * version 2.1 of the License, or (at your option) any later version. | |
| 9 * | |
| 10 * This library is distributed in the hope that it will be useful, | |
| 11 * but WITHOUT ANY WARRANTY; without even the implied warranty of | |
| 12 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU | |
| 13 * Lesser General Public License for more details. | |
| 14 * | |
| 15 * You should have received a copy of the GNU Lesser General Public | |
| 16 * License along with this library; if not, write to the Free Software | |
| 17 * Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA | |
| 18 */ | |
| 19 | |
| 20 /** | |
| 21 * This file implements the core API, which is relatively simple. | |
| 22 * The real meat of SDL_sound is in the decoders directory. | |
| 23 * | |
| 24 * Documentation is in SDL_sound.h ... It's verbose, honest. :) | |
| 25 * | |
|
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26 * Please see the file COPYING in the source's root directory. |
| 4 | 27 * |
| 28 * This file written by Ryan C. Gordon. (icculus@clutteredmind.org) | |
| 29 */ | |
| 30 | |
|
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31 #if HAVE_CONFIG_H |
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32 # include <config.h> |
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33 #endif |
| 4 | 34 |
| 35 #include <stdio.h> | |
| 36 #include <stdlib.h> | |
| 37 #include <string.h> | |
| 38 #include <assert.h> | |
| 39 #include <ctype.h> | |
| 40 | |
| 41 #include "SDL.h" | |
| 42 #include "SDL_sound.h" | |
| 43 | |
| 44 #define __SDL_SOUND_INTERNAL__ | |
| 45 #include "SDL_sound_internal.h" | |
| 46 | |
| 47 | |
| 48 /* The various decoder drivers... */ | |
| 49 | |
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50 #if (defined SOUND_SUPPORTS_MP3) |
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51 extern const Sound_DecoderFunctions __Sound_DecoderFunctions_MP3; |
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52 #endif |
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53 |
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54 #if (defined SOUND_SUPPORTS_MIKMOD) |
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55 extern const Sound_DecoderFunctions __Sound_DecoderFunctions_MIKMOD; |
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56 #endif |
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57 |
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58 #if (defined SOUND_SUPPORTS_MODPLUG) |
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59 extern const Sound_DecoderFunctions __Sound_DecoderFunctions_MODPLUG; |
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60 #endif |
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61 |
| 20 | 62 #if (defined SOUND_SUPPORTS_WAV) |
| 63 extern const Sound_DecoderFunctions __Sound_DecoderFunctions_WAV; | |
| 64 #endif | |
| 65 | |
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66 #if (defined SOUND_SUPPORTS_AIFF) |
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67 extern const Sound_DecoderFunctions __Sound_DecoderFunctions_AIFF; |
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68 #endif |
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69 |
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70 #if (defined SOUND_SUPPORTS_AU) |
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71 extern const Sound_DecoderFunctions __Sound_DecoderFunctions_AU; |
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72 #endif |
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73 |
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74 #if (defined SOUND_SUPPORTS_OGG) |
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75 extern const Sound_DecoderFunctions __Sound_DecoderFunctions_OGG; |
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76 #endif |
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77 |
| 4 | 78 #if (defined SOUND_SUPPORTS_VOC) |
| 79 extern const Sound_DecoderFunctions __Sound_DecoderFunctions_VOC; | |
| 80 #endif | |
| 81 | |
| 82 #if (defined SOUND_SUPPORTS_RAW) | |
| 83 extern const Sound_DecoderFunctions __Sound_DecoderFunctions_RAW; | |
| 84 #endif | |
| 85 | |
| 102 | 86 #if (defined SOUND_SUPPORTS_SHN) |
| 87 extern const Sound_DecoderFunctions __Sound_DecoderFunctions_SHN; | |
| 88 #endif | |
| 89 | |
| 110 | 90 #if (defined SOUND_SUPPORTS_MIDI) |
| 91 extern const Sound_DecoderFunctions __Sound_DecoderFunctions_MIDI; | |
| 92 #endif | |
| 93 | |
| 157 | 94 #if (defined SOUND_SUPPORTS_FLAC) |
| 95 extern const Sound_DecoderFunctions __Sound_DecoderFunctions_FLAC; | |
| 96 #endif | |
| 97 | |
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98 |
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99 |
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100 typedef struct |
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101 { |
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102 int available; |
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103 const Sound_DecoderFunctions *funcs; |
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104 } decoder_element; |
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105 |
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106 static decoder_element decoders[] = |
| 4 | 107 { |
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108 #if (defined SOUND_SUPPORTS_MP3) |
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109 { 0, &__Sound_DecoderFunctions_MP3 }, |
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110 #endif |
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111 |
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112 #if (defined SOUND_SUPPORTS_MODPLUG) |
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113 { 0, &__Sound_DecoderFunctions_MODPLUG }, |
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114 #endif |
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115 |
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116 #if (defined SOUND_SUPPORTS_MIKMOD) |
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117 { 0, &__Sound_DecoderFunctions_MIKMOD }, |
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118 #endif |
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119 |
| 20 | 120 #if (defined SOUND_SUPPORTS_WAV) |
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121 { 0, &__Sound_DecoderFunctions_WAV }, |
| 20 | 122 #endif |
| 123 | |
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124 #if (defined SOUND_SUPPORTS_AIFF) |
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125 { 0, &__Sound_DecoderFunctions_AIFF }, |
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126 #endif |
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127 |
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128 #if (defined SOUND_SUPPORTS_AU) |
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129 { 0, &__Sound_DecoderFunctions_AU }, |
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130 #endif |
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131 |
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132 #if (defined SOUND_SUPPORTS_OGG) |
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133 { 0, &__Sound_DecoderFunctions_OGG }, |
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134 #endif |
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135 |
| 4 | 136 #if (defined SOUND_SUPPORTS_VOC) |
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137 { 0, &__Sound_DecoderFunctions_VOC }, |
| 4 | 138 #endif |
| 139 | |
| 140 #if (defined SOUND_SUPPORTS_RAW) | |
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141 { 0, &__Sound_DecoderFunctions_RAW }, |
| 4 | 142 #endif |
| 102 | 143 |
| 144 #if (defined SOUND_SUPPORTS_SHN) | |
| 145 { 0, &__Sound_DecoderFunctions_SHN }, | |
| 146 #endif | |
| 110 | 147 |
|
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148 #if (defined SOUND_SUPPORTS_FLAC) |
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149 { 0, &__Sound_DecoderFunctions_FLAC }, |
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150 #endif |
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151 |
| 110 | 152 #if (defined SOUND_SUPPORTS_MIDI) |
| 153 { 0, &__Sound_DecoderFunctions_MIDI }, | |
| 154 #endif | |
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118
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155 |
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156 { 0, NULL } |
| 4 | 157 }; |
| 158 | |
| 159 | |
| 160 | |
| 161 /* General SDL_sound state ... */ | |
| 162 | |
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163 typedef struct __SOUND_ERRMSGTYPE__ |
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164 { |
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165 Uint32 tid; |
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166 int error_available; |
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167 char error_string[128]; |
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168 struct __SOUND_ERRMSGTYPE__ *next; |
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169 } ErrMsg; |
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170 |
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171 static ErrMsg *error_msgs = NULL; |
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172 static SDL_mutex *errorlist_mutex = NULL; |
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173 |
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174 static Sound_Sample *sample_list = NULL; /* this is a linked list. */ |
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175 static SDL_mutex *samplelist_mutex = NULL; |
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176 |
| 4 | 177 static const Sound_DecoderInfo **available_decoders = NULL; |
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178 static int initialized = 0; |
| 4 | 179 |
| 180 | |
| 181 /* functions ... */ | |
| 182 | |
| 183 void Sound_GetLinkedVersion(Sound_Version *ver) | |
| 184 { | |
| 185 if (ver != NULL) | |
| 186 { | |
| 187 ver->major = SOUND_VER_MAJOR; | |
| 188 ver->minor = SOUND_VER_MINOR; | |
| 189 ver->patch = SOUND_VER_PATCH; | |
| 190 } /* if */ | |
| 191 } /* Sound_GetLinkedVersion */ | |
| 192 | |
| 193 | |
| 194 int Sound_Init(void) | |
| 195 { | |
| 196 size_t i; | |
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197 size_t pos = 0; |
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198 size_t total = sizeof (decoders) / sizeof (decoders[0]); |
| 4 | 199 BAIL_IF_MACRO(initialized, ERR_IS_INITIALIZED, 0); |
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200 |
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201 sample_list = NULL; |
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202 error_msgs = NULL; |
| 4 | 203 |
| 204 available_decoders = (const Sound_DecoderInfo **) | |
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205 malloc((total) * sizeof (Sound_DecoderInfo *)); |
| 4 | 206 BAIL_IF_MACRO(available_decoders == NULL, ERR_OUT_OF_MEMORY, 0); |
| 207 | |
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208 SDL_Init(SDL_INIT_AUDIO); |
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209 |
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210 errorlist_mutex = SDL_CreateMutex(); |
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211 |
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212 for (i = 0; decoders[i].funcs != NULL; i++) |
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213 { |
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214 decoders[i].available = decoders[i].funcs->init(); |
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215 if (decoders[i].available) |
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216 { |
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217 available_decoders[pos] = &(decoders[i].funcs->info); |
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218 pos++; |
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219 } /* if */ |
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220 } /* for */ |
| 4 | 221 |
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222 available_decoders[pos] = NULL; |
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223 |
| 4 | 224 initialized = 1; |
| 225 return(1); | |
| 226 } /* Sound_Init */ | |
| 227 | |
| 228 | |
| 229 int Sound_Quit(void) | |
| 230 { | |
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231 ErrMsg *err; |
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232 ErrMsg *nexterr = NULL; |
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233 size_t i; |
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234 |
| 4 | 235 BAIL_IF_MACRO(!initialized, ERR_NOT_INITIALIZED, 0); |
| 236 | |
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237 while (((volatile Sound_Sample *) sample_list) != NULL) |
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238 Sound_FreeSample(sample_list); |
| 4 | 239 |
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240 initialized = 0; |
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241 |
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242 SDL_DestroyMutex(samplelist_mutex); |
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243 samplelist_mutex = NULL; |
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244 sample_list = NULL; |
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245 |
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246 for (i = 0; decoders[i].funcs != NULL; i++) |
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247 { |
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248 if (decoders[i].available) |
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249 { |
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250 decoders[i].funcs->quit(); |
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251 decoders[i].available = 0; |
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252 } /* if */ |
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253 } /* for */ |
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254 |
| 4 | 255 if (available_decoders != NULL) |
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256 free((void *) available_decoders); |
| 4 | 257 available_decoders = NULL; |
| 258 | |
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259 /* clean up error state for each thread... */ |
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260 SDL_LockMutex(errorlist_mutex); |
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261 for (err = error_msgs; err != NULL; err = nexterr) |
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262 { |
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263 nexterr = err->next; |
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264 free(err); |
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265 } /* for */ |
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266 error_msgs = NULL; |
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267 SDL_UnlockMutex(errorlist_mutex); |
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268 SDL_DestroyMutex(errorlist_mutex); |
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269 errorlist_mutex = NULL; |
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270 |
| 4 | 271 return(1); |
| 272 } /* Sound_Quit */ | |
| 273 | |
| 274 | |
| 275 const Sound_DecoderInfo **Sound_AvailableDecoders(void) | |
| 276 { | |
| 277 return(available_decoders); /* READ. ONLY. */ | |
| 278 } /* Sound_AvailableDecoders */ | |
| 279 | |
| 280 | |
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281 static ErrMsg *findErrorForCurrentThread(void) |
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282 { |
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283 ErrMsg *i; |
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284 Uint32 tid; |
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285 |
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286 if (error_msgs != NULL) |
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287 { |
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288 tid = SDL_ThreadID(); |
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289 |
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290 SDL_LockMutex(errorlist_mutex); |
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291 for (i = error_msgs; i != NULL; i = i->next) |
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292 { |
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293 if (i->tid == tid) |
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294 { |
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295 SDL_UnlockMutex(errorlist_mutex); |
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296 return(i); |
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297 } /* if */ |
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298 } /* for */ |
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299 SDL_UnlockMutex(errorlist_mutex); |
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300 } /* if */ |
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301 |
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302 return(NULL); /* no error available. */ |
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303 } /* findErrorForCurrentThread */ |
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304 |
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305 |
| 4 | 306 const char *Sound_GetError(void) |
| 307 { | |
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308 const char *retval = NULL; |
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309 ErrMsg *err; |
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310 |
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311 if (!initialized) |
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312 return(ERR_NOT_INITIALIZED); |
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313 |
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314 err = findErrorForCurrentThread(); |
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315 if ((err != NULL) && (err->error_available)) |
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316 { |
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317 retval = err->error_string; |
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318 err->error_available = 0; |
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319 } /* if */ |
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320 |
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321 return(retval); |
| 4 | 322 } /* Sound_GetError */ |
| 323 | |
| 324 | |
| 325 void Sound_ClearError(void) | |
| 326 { | |
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327 ErrMsg *err; |
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328 |
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329 if (!initialized) |
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330 return; |
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331 |
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332 err = findErrorForCurrentThread(); |
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333 if (err != NULL) |
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334 err->error_available = 0; |
| 4 | 335 } /* Sound_ClearError */ |
| 336 | |
| 337 | |
| 338 /* | |
| 339 * This is declared in the internal header. | |
| 340 */ | |
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341 void Sound_SetError(const char *str) |
| 4 | 342 { |
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343 ErrMsg *err; |
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344 |
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345 if (str == NULL) |
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346 return; |
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347 |
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348 SNDDBG(("Sound_SetError(\"%s\");%s\n", str, |
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349 (initialized) ? "" : " [NOT INITIALIZED!]")); |
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350 |
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351 if (!initialized) |
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352 return; |
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353 |
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354 err = findErrorForCurrentThread(); |
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355 if (err == NULL) |
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356 { |
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357 err = (ErrMsg *) malloc(sizeof (ErrMsg)); |
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358 if (err == NULL) |
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359 return; /* uhh...? */ |
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360 |
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361 memset((void *) err, '\0', sizeof (ErrMsg)); |
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362 err->tid = SDL_ThreadID(); |
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363 |
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364 SDL_LockMutex(errorlist_mutex); |
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365 err->next = error_msgs; |
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366 error_msgs = err; |
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367 SDL_UnlockMutex(errorlist_mutex); |
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368 } /* if */ |
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369 |
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370 err->error_available = 1; |
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371 strncpy(err->error_string, str, sizeof (err->error_string)); |
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372 err->error_string[sizeof (err->error_string) - 1] = '\0'; |
| 4 | 373 } /* Sound_SetError */ |
| 374 | |
| 375 | |
| 376 /* | |
| 377 * -ansi and -pedantic flags prevent use of strcasecmp() on Linux, and | |
| 378 * I honestly don't want to mess around with figuring out if a given | |
| 379 * platform has "strcasecmp", "stricmp", or | |
| 380 * "compare_two_damned_strings_case_insensitive", which I hear is in the | |
| 381 * next release of Carbon. :) This is exported so decoders may use it if | |
| 382 * they like. | |
| 383 */ | |
| 384 int __Sound_strcasecmp(const char *x, const char *y) | |
| 385 { | |
| 386 int ux, uy; | |
| 387 | |
|
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388 if (x == y) /* same pointer? Both NULL? */ |
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389 return(0); |
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390 |
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391 if (x == NULL) |
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392 return(-1); |
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393 |
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394 if (y == NULL) |
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395 return(1); |
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396 |
| 4 | 397 do |
| 398 { | |
| 399 ux = toupper((int) *x); | |
| 400 uy = toupper((int) *y); | |
| 401 if (ux > uy) | |
| 402 return(1); | |
| 403 else if (ux < uy) | |
| 404 return(-1); | |
| 405 x++; | |
| 406 y++; | |
| 407 } while ((ux) && (uy)); | |
| 408 | |
| 409 return(0); | |
| 410 } /* __Sound_strcasecmp */ | |
| 411 | |
| 412 | |
| 413 /* | |
| 414 * Allocate a Sound_Sample, and fill in most of its fields. Those that need | |
| 415 * to be filled in later, by a decoder, will be initialized to zero. | |
| 416 */ | |
| 417 static Sound_Sample *alloc_sample(SDL_RWops *rw, Sound_AudioInfo *desired, | |
| 418 Uint32 bufferSize) | |
| 419 { | |
| 420 Sound_Sample *retval = malloc(sizeof (Sound_Sample)); | |
| 421 Sound_SampleInternal *internal = malloc(sizeof (Sound_SampleInternal)); | |
| 422 if ((retval == NULL) || (internal == NULL)) | |
| 423 { | |
| 424 Sound_SetError(ERR_OUT_OF_MEMORY); | |
| 425 if (retval) | |
| 426 free(retval); | |
| 427 if (internal) | |
| 428 free(internal); | |
| 429 | |
| 430 return(NULL); | |
| 431 } /* if */ | |
| 432 | |
| 433 memset(retval, '\0', sizeof (Sound_Sample)); | |
| 434 memset(internal, '\0', sizeof (Sound_SampleInternal)); | |
| 435 | |
| 436 assert(bufferSize > 0); | |
| 437 retval->buffer = malloc(bufferSize); /* pure ugly. */ | |
| 438 if (!retval->buffer) | |
| 439 { | |
| 440 Sound_SetError(ERR_OUT_OF_MEMORY); | |
| 441 free(internal); | |
| 442 free(retval); | |
| 443 return(NULL); | |
| 444 } /* if */ | |
| 445 memset(retval->buffer, '\0', bufferSize); | |
| 446 retval->buffer_size = bufferSize; | |
| 447 | |
| 448 if (desired != NULL) | |
| 449 memcpy(&retval->desired, desired, sizeof (Sound_AudioInfo)); | |
| 450 | |
| 451 internal->rw = rw; | |
| 452 retval->opaque = internal; | |
| 453 return(retval); | |
| 454 } /* alloc_sample */ | |
| 455 | |
| 456 | |
|
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457 #if (defined DEBUG_CHATTER) |
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458 static __inline__ const char *fmt_to_str(Uint16 fmt) |
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459 { |
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460 switch(fmt) |
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461 { |
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462 case AUDIO_U8: |
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463 return("U8"); |
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464 case AUDIO_S8: |
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465 return("S8"); |
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466 case AUDIO_U16LSB: |
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467 return("U16LSB"); |
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468 case AUDIO_S16LSB: |
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469 return("S16LSB"); |
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470 case AUDIO_U16MSB: |
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471 return("U16MSB"); |
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472 case AUDIO_S16MSB: |
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473 return("S16MSB"); |
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474 } /* switch */ |
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475 |
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476 return("Unknown"); |
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477 } /* fmt_to_str */ |
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478 #endif |
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479 |
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480 |
| 4 | 481 /* |
| 482 * The bulk of the Sound_NewSample() work is done here... | |
| 483 * Ask the specified decoder to handle the data in (rw), and if | |
| 484 * so, construct the Sound_Sample. Otherwise, try to wind (rw)'s stream | |
| 485 * back to where it was, and return false. | |
| 486 * | |
| 487 * !!! FIXME: This is big, ugly, nasty, and smelly. | |
| 488 */ | |
| 489 static int init_sample(const Sound_DecoderFunctions *funcs, | |
| 490 Sound_Sample *sample, const char *ext, | |
| 491 Sound_AudioInfo *_desired) | |
| 492 { | |
| 493 Sound_SampleInternal *internal = (Sound_SampleInternal *) sample->opaque; | |
|
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494 Sound_AudioInfo desired; |
| 4 | 495 int pos = SDL_RWtell(internal->rw); /* !!! FIXME: Int? Really? */ |
| 496 | |
| 497 /* fill in the funcs for this decoder... */ | |
| 498 sample->decoder = &funcs->info; | |
| 499 internal->funcs = funcs; | |
| 500 if (!funcs->open(sample, ext)) | |
| 501 { | |
| 502 SDL_RWseek(internal->rw, pos, SEEK_SET); /* set for next try... */ | |
| 503 return(0); | |
| 504 } /* if */ | |
| 505 | |
| 506 /* success; we've got a decoder! */ | |
| 507 | |
| 508 /* Now we need to set up the conversion buffer... */ | |
| 509 | |
| 510 memcpy(&desired, (_desired != NULL) ? _desired : &sample->actual, | |
| 511 sizeof (Sound_AudioInfo)); | |
| 512 | |
|
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513 if (Sound_BuildAudioCVT(&internal->sdlcvt, |
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514 sample->actual.format, |
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515 sample->actual.channels, |
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516 sample->actual.rate, |
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517 desired.format, |
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518 desired.channels, |
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519 desired.rate) == -1) |
| 4 | 520 { |
| 521 Sound_SetError(SDL_GetError()); | |
| 522 funcs->close(sample); | |
| 523 SDL_RWseek(internal->rw, pos, SEEK_SET); /* set for next try... */ | |
| 524 return(0); | |
| 525 } /* if */ | |
| 526 | |
| 527 if (internal->sdlcvt.len_mult > 1) | |
| 528 { | |
| 529 void *rc = realloc(sample->buffer, | |
|
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530 sample->buffer_size * internal->sdlcvt.len_mult); |
| 4 | 531 if (rc == NULL) |
| 532 { | |
| 533 funcs->close(sample); | |
| 534 SDL_RWseek(internal->rw, pos, SEEK_SET); /* set for next try... */ | |
| 535 return(0); | |
| 536 } /* if */ | |
| 537 | |
| 538 sample->buffer = rc; | |
| 539 } /* if */ | |
| 540 | |
| 541 /* these pointers are all one and the same. */ | |
| 542 memcpy(&sample->desired, &desired, sizeof (Sound_AudioInfo)); | |
| 543 internal->sdlcvt.buf = internal->buffer = sample->buffer; | |
| 544 internal->buffer_size = sample->buffer_size / internal->sdlcvt.len_mult; | |
| 545 internal->sdlcvt.len = internal->buffer_size; | |
| 546 | |
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547 /* Prepend our new Sound_Sample to the sample_list... */ |
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548 SDL_LockMutex(samplelist_mutex); |
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549 internal->next = sample_list; |
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550 if (sample_list != NULL) |
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551 ((Sound_SampleInternal *) sample_list->opaque)->prev = sample; |
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552 sample_list = sample; |
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553 SDL_UnlockMutex(samplelist_mutex); |
| 4 | 554 |
|
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555 SNDDBG(("New sample DESIRED format: %s format, %d rate, %d channels.\n", |
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556 fmt_to_str(sample->desired.format), |
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557 sample->desired.rate, |
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558 sample->desired.channels)); |
|
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559 |
|
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560 SNDDBG(("New sample ACTUAL format: %s format, %d rate, %d channels.\n", |
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561 fmt_to_str(sample->actual.format), |
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562 sample->actual.rate, |
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563 sample->actual.channels)); |
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564 |
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565 SNDDBG(("On-the-fly conversion: %s.\n", |
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566 internal->sdlcvt.needed ? "ENABLED" : "DISABLED")); |
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567 |
| 4 | 568 return(1); |
| 569 } /* init_sample */ | |
| 570 | |
| 571 | |
| 572 Sound_Sample *Sound_NewSample(SDL_RWops *rw, const char *ext, | |
| 573 Sound_AudioInfo *desired, Uint32 bSize) | |
| 574 { | |
| 575 Sound_Sample *retval; | |
|
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576 decoder_element *decoder; |
| 4 | 577 |
| 578 /* sanity checks. */ | |
| 579 BAIL_IF_MACRO(!initialized, ERR_NOT_INITIALIZED, NULL); | |
| 580 BAIL_IF_MACRO(rw == NULL, ERR_INVALID_ARGUMENT, NULL); | |
| 581 | |
| 582 retval = alloc_sample(rw, desired, bSize); | |
| 583 if (!retval) | |
| 584 return(NULL); /* alloc_sample() sets error message... */ | |
| 585 | |
| 586 if (ext != NULL) | |
| 587 { | |
|
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588 for (decoder = &decoders[0]; decoder->funcs != NULL; decoder++) |
| 4 | 589 { |
|
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590 if (decoder->available) |
| 4 | 591 { |
|
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592 const char **decoderExt = decoder->funcs->info.extensions; |
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593 while (*decoderExt) |
|
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594 { |
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595 if (__Sound_strcasecmp(*decoderExt, ext) == 0) |
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596 { |
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597 if (init_sample(decoder->funcs, retval, ext, desired)) |
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598 return(retval); |
|
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599 break; /* done with this decoder either way. */ |
|
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600 } /* if */ |
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601 decoderExt++; |
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602 } /* while */ |
| 4 | 603 } /* if */ |
| 604 } /* for */ | |
| 605 } /* if */ | |
| 606 | |
| 607 /* no direct extension match? Try everything we've got... */ | |
|
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608 for (decoder = &decoders[0]; decoder->funcs != NULL; decoder++) |
| 4 | 609 { |
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610 if (decoder->available) |
|
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611 { |
|
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612 int should_try = 1; |
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613 const char **decoderExt = decoder->funcs->info.extensions; |
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614 |
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615 /* skip if we would have tried decoder above... */ |
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616 while (*decoderExt) |
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617 { |
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618 if (__Sound_strcasecmp(*decoderExt, ext) == 0) |
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619 { |
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620 should_try = 0; |
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621 break; |
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622 } /* if */ |
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623 decoderExt++; |
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624 } /* while */ |
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625 |
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626 if (should_try) |
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627 { |
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628 if (init_sample(decoder->funcs, retval, ext, desired)) |
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629 return(retval); |
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630 } /* if */ |
|
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631 } /* if */ |
| 4 | 632 } /* for */ |
| 633 | |
| 634 /* nothing could handle the sound data... */ | |
| 635 free(retval->opaque); | |
| 636 if (retval->buffer != NULL) | |
| 637 free(retval->buffer); | |
| 638 free(retval); | |
| 639 SDL_RWclose(rw); | |
| 640 Sound_SetError(ERR_UNSUPPORTED_FORMAT); | |
| 641 return(NULL); | |
| 642 } /* Sound_NewSample */ | |
| 643 | |
| 644 | |
| 645 Sound_Sample *Sound_NewSampleFromFile(const char *filename, | |
| 646 Sound_AudioInfo *desired, | |
| 647 Uint32 bufferSize) | |
| 648 { | |
| 649 const char *ext; | |
| 650 SDL_RWops *rw; | |
| 651 | |
| 652 BAIL_IF_MACRO(!initialized, ERR_NOT_INITIALIZED, NULL); | |
| 653 BAIL_IF_MACRO(filename == NULL, ERR_INVALID_ARGUMENT, NULL); | |
| 654 | |
| 655 ext = strrchr(filename, '.'); | |
| 656 rw = SDL_RWFromFile(filename, "rb"); | |
| 657 BAIL_IF_MACRO(rw == NULL, SDL_GetError(), NULL); | |
| 658 | |
| 659 if (ext != NULL) | |
| 660 ext++; | |
| 661 | |
| 662 return(Sound_NewSample(rw, ext, desired, bufferSize)); | |
| 663 } /* Sound_NewSampleFromFile */ | |
| 664 | |
| 665 | |
| 666 void Sound_FreeSample(Sound_Sample *sample) | |
| 667 { | |
| 668 Sound_SampleInternal *internal; | |
| 669 | |
| 670 if (!initialized) | |
| 671 { | |
| 672 Sound_SetError(ERR_NOT_INITIALIZED); | |
| 673 return; | |
| 674 } /* if */ | |
| 675 | |
| 676 if (sample == NULL) | |
| 677 { | |
| 678 Sound_SetError(ERR_INVALID_ARGUMENT); | |
| 679 return; | |
| 680 } /* if */ | |
| 681 | |
| 682 internal = (Sound_SampleInternal *) sample->opaque; | |
| 683 | |
|
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684 SDL_LockMutex(samplelist_mutex); |
| 4 | 685 |
|
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686 /* update the sample_list... */ |
| 4 | 687 if (internal->prev != NULL) |
| 688 { | |
| 689 Sound_SampleInternal *prevInternal; | |
| 690 prevInternal = (Sound_SampleInternal *) internal->prev->opaque; | |
| 691 prevInternal->next = internal->next; | |
| 692 } /* if */ | |
| 693 else | |
| 694 { | |
|
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695 assert(sample_list == sample); |
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696 sample_list = internal->next; |
| 4 | 697 } /* else */ |
| 698 | |
| 699 if (internal->next != NULL) | |
| 700 { | |
| 701 Sound_SampleInternal *nextInternal; | |
| 702 nextInternal = (Sound_SampleInternal *) internal->next->opaque; | |
| 703 nextInternal->prev = internal->prev; | |
| 704 } /* if */ | |
| 705 | |
|
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706 SDL_UnlockMutex(samplelist_mutex); |
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707 |
| 4 | 708 /* nuke it... */ |
|
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709 internal->funcs->close(sample); |
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710 |
| 4 | 711 if (internal->rw != NULL) /* this condition is a "just in case" thing. */ |
| 712 SDL_RWclose(internal->rw); | |
|
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713 |
|
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714 if ((internal->buffer != NULL) && (internal->buffer != sample->buffer)) |
| 4 | 715 free(internal->buffer); |
|
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716 |
| 4 | 717 free(internal); |
|
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718 |
| 4 | 719 if (sample->buffer != NULL) |
| 720 free(sample->buffer); | |
|
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721 |
| 4 | 722 free(sample); |
| 723 } /* Sound_FreeSample */ | |
| 724 | |
| 725 | |
| 726 int Sound_SetBufferSize(Sound_Sample *sample, Uint32 newSize) | |
| 727 { | |
| 728 void *newBuf = NULL; | |
| 729 Sound_SampleInternal *internal = NULL; | |
| 730 | |
| 731 BAIL_IF_MACRO(!initialized, ERR_NOT_INITIALIZED, 0); | |
| 732 BAIL_IF_MACRO(sample == NULL, ERR_INVALID_ARGUMENT, 0); | |
| 733 internal = ((Sound_SampleInternal *) sample->opaque); | |
| 734 newBuf = realloc(sample->buffer, newSize * internal->sdlcvt.len_mult); | |
| 735 BAIL_IF_MACRO(newBuf == NULL, ERR_OUT_OF_MEMORY, 0); | |
| 736 | |
| 737 internal->sdlcvt.buf = internal->buffer = sample->buffer = newBuf; | |
| 738 sample->buffer_size = newSize; | |
| 739 internal->buffer_size = newSize / internal->sdlcvt.len_mult; | |
| 740 internal->sdlcvt.len = internal->buffer_size; | |
| 741 | |
| 742 return(1); | |
| 743 } /* Sound_SetBufferSize */ | |
| 744 | |
| 745 | |
| 746 Uint32 Sound_Decode(Sound_Sample *sample) | |
| 747 { | |
| 748 Sound_SampleInternal *internal = NULL; | |
| 749 Uint32 retval = 0; | |
| 750 | |
| 751 /* a boatload of sanity checks... */ | |
| 752 BAIL_IF_MACRO(!initialized, ERR_NOT_INITIALIZED, 0); | |
| 753 BAIL_IF_MACRO(sample == NULL, ERR_INVALID_ARGUMENT, 0); | |
| 754 BAIL_IF_MACRO(sample->flags & SOUND_SAMPLEFLAG_ERROR, ERR_PREV_ERROR, 0); | |
| 755 BAIL_IF_MACRO(sample->flags & SOUND_SAMPLEFLAG_EOF, ERR_PREV_EOF, 0); | |
| 756 | |
| 757 internal = (Sound_SampleInternal *) sample->opaque; | |
| 758 | |
| 759 assert(sample->buffer != NULL); | |
| 760 assert(sample->buffer_size > 0); | |
| 761 assert(internal->buffer != NULL); | |
| 762 assert(internal->buffer_size > 0); | |
| 763 | |
| 764 /* reset EAGAIN. Decoder can flip it back on if it needs to. */ | |
| 765 sample->flags &= !SOUND_SAMPLEFLAG_EAGAIN; | |
| 766 retval = internal->funcs->read(sample); | |
|
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|
767 |
|
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768 if (retval > 0 && internal->sdlcvt.needed) |
| 4 | 769 { |
| 770 internal->sdlcvt.len = retval; | |
|
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771 Sound_ConvertAudio(&internal->sdlcvt); |
|
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|
772 retval = internal->sdlcvt.len_cvt; |
| 4 | 773 } /* if */ |
| 774 | |
| 775 return(retval); | |
| 776 } /* Sound_Decode */ | |
| 777 | |
| 778 | |
| 779 Uint32 Sound_DecodeAll(Sound_Sample *sample) | |
| 780 { | |
| 781 Sound_SampleInternal *internal = NULL; | |
| 782 void *buf = NULL; | |
| 783 Uint32 newBufSize = 0; | |
| 784 | |
| 785 BAIL_IF_MACRO(!initialized, ERR_NOT_INITIALIZED, 0); | |
|
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786 BAIL_IF_MACRO(sample->flags & SOUND_SAMPLEFLAG_EOF, ERR_PREV_EOF, 0); |
|
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787 BAIL_IF_MACRO(sample->flags & SOUND_SAMPLEFLAG_ERROR, ERR_PREV_ERROR, 0); |
| 4 | 788 |
| 789 internal = (Sound_SampleInternal *) sample->opaque; | |
| 790 | |
| 791 while ( ((sample->flags & SOUND_SAMPLEFLAG_EOF) == 0) && | |
| 792 ((sample->flags & SOUND_SAMPLEFLAG_ERROR) == 0) ) | |
| 793 { | |
|
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794 Uint32 br = Sound_Decode(sample); |
|
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|
795 void *ptr = realloc(buf, newBufSize + br); |
| 4 | 796 if (ptr == NULL) |
| 797 { | |
| 798 sample->flags |= SOUND_SAMPLEFLAG_ERROR; | |
| 799 Sound_SetError(ERR_OUT_OF_MEMORY); | |
| 800 } /* if */ | |
| 801 else | |
| 802 { | |
|
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803 buf = ptr; |
| 4 | 804 memcpy( ((char *) buf) + newBufSize, sample->buffer, br ); |
| 805 newBufSize += br; | |
| 806 } /* else */ | |
| 807 } /* while */ | |
| 808 | |
|
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809 if (buf == NULL) /* ...in case first call to realloc() fails... */ |
|
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810 return(sample->buffer_size); |
|
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811 |
|
167
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812 if (internal->buffer != sample->buffer) |
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813 free(internal->buffer); |
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814 |
| 4 | 815 free(sample->buffer); |
|
167
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|
816 |
|
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817 internal->sdlcvt.buf = internal->buffer = sample->buffer = buf; |
| 4 | 818 sample->buffer_size = newBufSize; |
| 819 internal->buffer_size = newBufSize / internal->sdlcvt.len_mult; | |
|
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820 internal->sdlcvt.len = internal->buffer_size; |
| 4 | 821 |
| 822 return(newBufSize); | |
| 823 } /* Sound_DecodeAll */ | |
| 824 | |
|
223
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825 |
|
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|
826 int Sound_Rewind(Sound_Sample *sample) |
|
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827 { |
|
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828 Sound_SampleInternal *internal; |
|
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829 BAIL_IF_MACRO(!initialized, ERR_NOT_INITIALIZED, 0); |
|
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830 |
|
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831 internal = (Sound_SampleInternal *) sample->opaque; |
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832 if (!internal->funcs->rewind(sample)) |
|
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833 { |
|
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834 sample->flags |= SOUND_SAMPLEFLAG_ERROR; |
|
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835 return(0); |
|
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836 } /* if */ |
|
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837 |
|
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838 sample->flags &= !SOUND_SAMPLEFLAG_EAGAIN; |
|
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839 sample->flags &= !SOUND_SAMPLEFLAG_ERROR; |
|
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840 sample->flags &= !SOUND_SAMPLEFLAG_EOF; |
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841 return(1); |
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842 } /* Sound_Rewind */ |
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843 |
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844 |
| 4 | 845 /* end of SDL_sound.c ... */ |
| 846 |