Mercurial > SDL_sound_CoreAudio
annotate SDL_sound.c @ 278:dfe4a46f88f7
Updated.
| author | Ryan C. Gordon <icculus@icculus.org> |
|---|---|
| date | Thu, 14 Mar 2002 16:38:32 +0000 |
| parents | 6fe6de401b63 |
| children | c97be6e1bd27 |
| 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 | |
| 262 | 50 #if (defined SOUND_SUPPORTS_SMPEG) |
| 51 extern const Sound_DecoderFunctions __Sound_DecoderFunctions_SMPEG; | |
| 52 #endif | |
| 53 | |
| 54 #if (defined SOUND_SUPPORTS_MPGLIB) | |
| 55 extern const Sound_DecoderFunctions __Sound_DecoderFunctions_MPGLIB; | |
|
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56 #endif |
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57 |
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58 #if (defined SOUND_SUPPORTS_MIKMOD) |
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59 extern const Sound_DecoderFunctions __Sound_DecoderFunctions_MIKMOD; |
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60 #endif |
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61 |
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62 #if (defined SOUND_SUPPORTS_MODPLUG) |
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63 extern const Sound_DecoderFunctions __Sound_DecoderFunctions_MODPLUG; |
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64 #endif |
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65 |
| 20 | 66 #if (defined SOUND_SUPPORTS_WAV) |
| 67 extern const Sound_DecoderFunctions __Sound_DecoderFunctions_WAV; | |
| 68 #endif | |
| 69 | |
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70 #if (defined SOUND_SUPPORTS_AIFF) |
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71 extern const Sound_DecoderFunctions __Sound_DecoderFunctions_AIFF; |
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72 #endif |
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73 |
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74 #if (defined SOUND_SUPPORTS_AU) |
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75 extern const Sound_DecoderFunctions __Sound_DecoderFunctions_AU; |
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76 #endif |
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77 |
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78 #if (defined SOUND_SUPPORTS_OGG) |
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79 extern const Sound_DecoderFunctions __Sound_DecoderFunctions_OGG; |
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80 #endif |
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81 |
| 4 | 82 #if (defined SOUND_SUPPORTS_VOC) |
| 83 extern const Sound_DecoderFunctions __Sound_DecoderFunctions_VOC; | |
| 84 #endif | |
| 85 | |
| 86 #if (defined SOUND_SUPPORTS_RAW) | |
| 87 extern const Sound_DecoderFunctions __Sound_DecoderFunctions_RAW; | |
| 88 #endif | |
| 89 | |
| 102 | 90 #if (defined SOUND_SUPPORTS_SHN) |
| 91 extern const Sound_DecoderFunctions __Sound_DecoderFunctions_SHN; | |
| 92 #endif | |
| 93 | |
| 110 | 94 #if (defined SOUND_SUPPORTS_MIDI) |
| 95 extern const Sound_DecoderFunctions __Sound_DecoderFunctions_MIDI; | |
| 96 #endif | |
| 97 | |
| 157 | 98 #if (defined SOUND_SUPPORTS_FLAC) |
| 99 extern const Sound_DecoderFunctions __Sound_DecoderFunctions_FLAC; | |
| 100 #endif | |
| 101 | |
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102 |
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103 |
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104 typedef struct |
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105 { |
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106 int available; |
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107 const Sound_DecoderFunctions *funcs; |
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108 } decoder_element; |
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109 |
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110 static decoder_element decoders[] = |
| 4 | 111 { |
| 262 | 112 #if (defined SOUND_SUPPORTS_SMPEG) |
| 113 { 0, &__Sound_DecoderFunctions_SMPEG }, | |
| 114 #endif | |
| 115 | |
| 116 #if (defined SOUND_SUPPORTS_MPGLIB) | |
| 117 { 0, &__Sound_DecoderFunctions_MPGLIB }, | |
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118 #endif |
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119 |
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120 #if (defined SOUND_SUPPORTS_MODPLUG) |
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121 { 0, &__Sound_DecoderFunctions_MODPLUG }, |
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122 #endif |
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123 |
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124 #if (defined SOUND_SUPPORTS_MIKMOD) |
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125 { 0, &__Sound_DecoderFunctions_MIKMOD }, |
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126 #endif |
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127 |
| 20 | 128 #if (defined SOUND_SUPPORTS_WAV) |
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129 { 0, &__Sound_DecoderFunctions_WAV }, |
| 20 | 130 #endif |
| 131 | |
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132 #if (defined SOUND_SUPPORTS_AIFF) |
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133 { 0, &__Sound_DecoderFunctions_AIFF }, |
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134 #endif |
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135 |
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136 #if (defined SOUND_SUPPORTS_AU) |
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137 { 0, &__Sound_DecoderFunctions_AU }, |
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138 #endif |
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139 |
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140 #if (defined SOUND_SUPPORTS_OGG) |
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141 { 0, &__Sound_DecoderFunctions_OGG }, |
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142 #endif |
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143 |
| 4 | 144 #if (defined SOUND_SUPPORTS_VOC) |
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145 { 0, &__Sound_DecoderFunctions_VOC }, |
| 4 | 146 #endif |
| 147 | |
| 148 #if (defined SOUND_SUPPORTS_RAW) | |
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149 { 0, &__Sound_DecoderFunctions_RAW }, |
| 4 | 150 #endif |
| 102 | 151 |
| 152 #if (defined SOUND_SUPPORTS_SHN) | |
| 153 { 0, &__Sound_DecoderFunctions_SHN }, | |
| 154 #endif | |
| 110 | 155 |
|
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156 #if (defined SOUND_SUPPORTS_FLAC) |
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157 { 0, &__Sound_DecoderFunctions_FLAC }, |
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158 #endif |
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159 |
| 110 | 160 #if (defined SOUND_SUPPORTS_MIDI) |
| 161 { 0, &__Sound_DecoderFunctions_MIDI }, | |
| 162 #endif | |
|
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163 |
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164 { 0, NULL } |
| 4 | 165 }; |
| 166 | |
| 167 | |
| 168 | |
| 169 /* General SDL_sound state ... */ | |
| 170 | |
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171 typedef struct __SOUND_ERRMSGTYPE__ |
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172 { |
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173 Uint32 tid; |
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174 int error_available; |
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175 char error_string[128]; |
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176 struct __SOUND_ERRMSGTYPE__ *next; |
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177 } ErrMsg; |
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178 |
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179 static ErrMsg *error_msgs = NULL; |
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180 static SDL_mutex *errorlist_mutex = NULL; |
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181 |
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182 static Sound_Sample *sample_list = NULL; /* this is a linked list. */ |
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183 static SDL_mutex *samplelist_mutex = NULL; |
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184 |
| 4 | 185 static const Sound_DecoderInfo **available_decoders = NULL; |
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186 static int initialized = 0; |
| 4 | 187 |
| 188 | |
| 189 /* functions ... */ | |
| 190 | |
| 191 void Sound_GetLinkedVersion(Sound_Version *ver) | |
| 192 { | |
| 193 if (ver != NULL) | |
| 194 { | |
| 195 ver->major = SOUND_VER_MAJOR; | |
| 196 ver->minor = SOUND_VER_MINOR; | |
| 197 ver->patch = SOUND_VER_PATCH; | |
| 198 } /* if */ | |
| 199 } /* Sound_GetLinkedVersion */ | |
| 200 | |
| 201 | |
| 202 int Sound_Init(void) | |
| 203 { | |
| 204 size_t i; | |
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205 size_t pos = 0; |
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206 size_t total = sizeof (decoders) / sizeof (decoders[0]); |
| 4 | 207 BAIL_IF_MACRO(initialized, ERR_IS_INITIALIZED, 0); |
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208 |
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209 sample_list = NULL; |
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210 error_msgs = NULL; |
| 4 | 211 |
| 212 available_decoders = (const Sound_DecoderInfo **) | |
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213 malloc((total) * sizeof (Sound_DecoderInfo *)); |
| 4 | 214 BAIL_IF_MACRO(available_decoders == NULL, ERR_OUT_OF_MEMORY, 0); |
| 215 | |
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216 SDL_Init(SDL_INIT_AUDIO); |
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217 |
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218 errorlist_mutex = SDL_CreateMutex(); |
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219 |
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220 for (i = 0; decoders[i].funcs != NULL; i++) |
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221 { |
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222 decoders[i].available = decoders[i].funcs->init(); |
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223 if (decoders[i].available) |
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224 { |
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225 available_decoders[pos] = &(decoders[i].funcs->info); |
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226 pos++; |
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227 } /* if */ |
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228 } /* for */ |
| 4 | 229 |
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230 available_decoders[pos] = NULL; |
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231 |
| 4 | 232 initialized = 1; |
| 233 return(1); | |
| 234 } /* Sound_Init */ | |
| 235 | |
| 236 | |
| 237 int Sound_Quit(void) | |
| 238 { | |
|
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239 ErrMsg *err; |
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240 ErrMsg *nexterr = NULL; |
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241 size_t i; |
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242 |
| 4 | 243 BAIL_IF_MACRO(!initialized, ERR_NOT_INITIALIZED, 0); |
| 244 | |
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245 while (((volatile Sound_Sample *) sample_list) != NULL) |
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246 Sound_FreeSample(sample_list); |
| 4 | 247 |
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248 initialized = 0; |
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249 |
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250 SDL_DestroyMutex(samplelist_mutex); |
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251 samplelist_mutex = NULL; |
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252 sample_list = NULL; |
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253 |
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254 for (i = 0; decoders[i].funcs != NULL; i++) |
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255 { |
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256 if (decoders[i].available) |
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257 { |
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258 decoders[i].funcs->quit(); |
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259 decoders[i].available = 0; |
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260 } /* if */ |
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261 } /* for */ |
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262 |
| 4 | 263 if (available_decoders != NULL) |
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264 free((void *) available_decoders); |
| 4 | 265 available_decoders = NULL; |
| 266 | |
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267 /* clean up error state for each thread... */ |
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268 SDL_LockMutex(errorlist_mutex); |
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269 for (err = error_msgs; err != NULL; err = nexterr) |
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270 { |
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271 nexterr = err->next; |
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272 free(err); |
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273 } /* for */ |
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274 error_msgs = NULL; |
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275 SDL_UnlockMutex(errorlist_mutex); |
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276 SDL_DestroyMutex(errorlist_mutex); |
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277 errorlist_mutex = NULL; |
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278 |
| 4 | 279 return(1); |
| 280 } /* Sound_Quit */ | |
| 281 | |
| 282 | |
| 283 const Sound_DecoderInfo **Sound_AvailableDecoders(void) | |
| 284 { | |
| 285 return(available_decoders); /* READ. ONLY. */ | |
| 286 } /* Sound_AvailableDecoders */ | |
| 287 | |
| 288 | |
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289 static ErrMsg *findErrorForCurrentThread(void) |
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290 { |
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291 ErrMsg *i; |
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292 Uint32 tid; |
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293 |
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294 if (error_msgs != NULL) |
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295 { |
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296 tid = SDL_ThreadID(); |
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297 |
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298 SDL_LockMutex(errorlist_mutex); |
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299 for (i = error_msgs; i != NULL; i = i->next) |
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300 { |
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301 if (i->tid == tid) |
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302 { |
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303 SDL_UnlockMutex(errorlist_mutex); |
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304 return(i); |
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305 } /* if */ |
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306 } /* for */ |
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307 SDL_UnlockMutex(errorlist_mutex); |
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308 } /* if */ |
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309 |
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310 return(NULL); /* no error available. */ |
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311 } /* findErrorForCurrentThread */ |
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312 |
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313 |
| 4 | 314 const char *Sound_GetError(void) |
| 315 { | |
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316 const char *retval = NULL; |
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317 ErrMsg *err; |
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318 |
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319 if (!initialized) |
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320 return(ERR_NOT_INITIALIZED); |
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321 |
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322 err = findErrorForCurrentThread(); |
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323 if ((err != NULL) && (err->error_available)) |
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324 { |
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325 retval = err->error_string; |
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326 err->error_available = 0; |
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327 } /* if */ |
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328 |
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329 return(retval); |
| 4 | 330 } /* Sound_GetError */ |
| 331 | |
| 332 | |
| 333 void Sound_ClearError(void) | |
| 334 { | |
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335 ErrMsg *err; |
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336 |
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337 if (!initialized) |
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338 return; |
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339 |
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340 err = findErrorForCurrentThread(); |
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341 if (err != NULL) |
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342 err->error_available = 0; |
| 4 | 343 } /* Sound_ClearError */ |
| 344 | |
| 345 | |
| 346 /* | |
| 347 * This is declared in the internal header. | |
| 348 */ | |
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349 void Sound_SetError(const char *str) |
| 4 | 350 { |
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351 ErrMsg *err; |
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352 |
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353 if (str == NULL) |
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354 return; |
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355 |
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356 SNDDBG(("Sound_SetError(\"%s\");%s\n", str, |
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357 (initialized) ? "" : " [NOT INITIALIZED!]")); |
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358 |
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359 if (!initialized) |
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360 return; |
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361 |
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362 err = findErrorForCurrentThread(); |
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363 if (err == NULL) |
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364 { |
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365 err = (ErrMsg *) malloc(sizeof (ErrMsg)); |
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366 if (err == NULL) |
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367 return; /* uhh...? */ |
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368 |
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369 memset((void *) err, '\0', sizeof (ErrMsg)); |
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370 err->tid = SDL_ThreadID(); |
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371 |
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372 SDL_LockMutex(errorlist_mutex); |
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373 err->next = error_msgs; |
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374 error_msgs = err; |
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375 SDL_UnlockMutex(errorlist_mutex); |
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376 } /* if */ |
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377 |
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378 err->error_available = 1; |
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379 strncpy(err->error_string, str, sizeof (err->error_string)); |
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380 err->error_string[sizeof (err->error_string) - 1] = '\0'; |
| 4 | 381 } /* Sound_SetError */ |
| 382 | |
| 383 | |
| 384 /* | |
| 385 * -ansi and -pedantic flags prevent use of strcasecmp() on Linux, and | |
| 386 * I honestly don't want to mess around with figuring out if a given | |
| 387 * platform has "strcasecmp", "stricmp", or | |
| 388 * "compare_two_damned_strings_case_insensitive", which I hear is in the | |
| 389 * next release of Carbon. :) This is exported so decoders may use it if | |
| 390 * they like. | |
| 391 */ | |
| 392 int __Sound_strcasecmp(const char *x, const char *y) | |
| 393 { | |
| 394 int ux, uy; | |
| 395 | |
|
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396 if (x == y) /* same pointer? Both NULL? */ |
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397 return(0); |
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398 |
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399 if (x == NULL) |
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400 return(-1); |
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401 |
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402 if (y == NULL) |
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403 return(1); |
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404 |
| 4 | 405 do |
| 406 { | |
| 407 ux = toupper((int) *x); | |
| 408 uy = toupper((int) *y); | |
| 409 if (ux > uy) | |
| 410 return(1); | |
| 411 else if (ux < uy) | |
| 412 return(-1); | |
| 413 x++; | |
| 414 y++; | |
| 415 } while ((ux) && (uy)); | |
| 416 | |
| 417 return(0); | |
| 418 } /* __Sound_strcasecmp */ | |
| 419 | |
| 420 | |
| 421 /* | |
| 422 * Allocate a Sound_Sample, and fill in most of its fields. Those that need | |
| 423 * to be filled in later, by a decoder, will be initialized to zero. | |
| 424 */ | |
| 425 static Sound_Sample *alloc_sample(SDL_RWops *rw, Sound_AudioInfo *desired, | |
| 426 Uint32 bufferSize) | |
| 427 { | |
| 428 Sound_Sample *retval = malloc(sizeof (Sound_Sample)); | |
| 429 Sound_SampleInternal *internal = malloc(sizeof (Sound_SampleInternal)); | |
| 430 if ((retval == NULL) || (internal == NULL)) | |
| 431 { | |
| 432 Sound_SetError(ERR_OUT_OF_MEMORY); | |
| 433 if (retval) | |
| 434 free(retval); | |
| 435 if (internal) | |
| 436 free(internal); | |
| 437 | |
| 438 return(NULL); | |
| 439 } /* if */ | |
| 440 | |
| 441 memset(retval, '\0', sizeof (Sound_Sample)); | |
| 442 memset(internal, '\0', sizeof (Sound_SampleInternal)); | |
| 443 | |
| 444 assert(bufferSize > 0); | |
| 445 retval->buffer = malloc(bufferSize); /* pure ugly. */ | |
| 446 if (!retval->buffer) | |
| 447 { | |
| 448 Sound_SetError(ERR_OUT_OF_MEMORY); | |
| 449 free(internal); | |
| 450 free(retval); | |
| 451 return(NULL); | |
| 452 } /* if */ | |
| 453 memset(retval->buffer, '\0', bufferSize); | |
| 454 retval->buffer_size = bufferSize; | |
| 455 | |
| 456 if (desired != NULL) | |
| 457 memcpy(&retval->desired, desired, sizeof (Sound_AudioInfo)); | |
| 458 | |
| 459 internal->rw = rw; | |
| 460 retval->opaque = internal; | |
| 461 return(retval); | |
| 462 } /* alloc_sample */ | |
| 463 | |
| 464 | |
|
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465 #if (defined DEBUG_CHATTER) |
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466 static __inline__ const char *fmt_to_str(Uint16 fmt) |
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467 { |
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468 switch(fmt) |
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469 { |
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470 case AUDIO_U8: |
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471 return("U8"); |
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472 case AUDIO_S8: |
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473 return("S8"); |
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474 case AUDIO_U16LSB: |
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475 return("U16LSB"); |
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476 case AUDIO_S16LSB: |
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477 return("S16LSB"); |
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478 case AUDIO_U16MSB: |
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479 return("U16MSB"); |
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480 case AUDIO_S16MSB: |
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481 return("S16MSB"); |
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482 } /* switch */ |
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483 |
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484 return("Unknown"); |
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485 } /* fmt_to_str */ |
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486 #endif |
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487 |
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488 |
| 4 | 489 /* |
| 490 * The bulk of the Sound_NewSample() work is done here... | |
| 491 * Ask the specified decoder to handle the data in (rw), and if | |
| 492 * so, construct the Sound_Sample. Otherwise, try to wind (rw)'s stream | |
| 493 * back to where it was, and return false. | |
| 494 * | |
| 495 * !!! FIXME: This is big, ugly, nasty, and smelly. | |
| 496 */ | |
| 497 static int init_sample(const Sound_DecoderFunctions *funcs, | |
| 498 Sound_Sample *sample, const char *ext, | |
| 499 Sound_AudioInfo *_desired) | |
| 500 { | |
| 501 Sound_SampleInternal *internal = (Sound_SampleInternal *) sample->opaque; | |
|
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502 Sound_AudioInfo desired; |
| 4 | 503 int pos = SDL_RWtell(internal->rw); /* !!! FIXME: Int? Really? */ |
| 504 | |
| 505 /* fill in the funcs for this decoder... */ | |
| 506 sample->decoder = &funcs->info; | |
| 507 internal->funcs = funcs; | |
| 508 if (!funcs->open(sample, ext)) | |
| 509 { | |
| 510 SDL_RWseek(internal->rw, pos, SEEK_SET); /* set for next try... */ | |
| 511 return(0); | |
| 512 } /* if */ | |
| 513 | |
| 514 /* success; we've got a decoder! */ | |
| 515 | |
| 516 /* Now we need to set up the conversion buffer... */ | |
| 517 | |
| 518 memcpy(&desired, (_desired != NULL) ? _desired : &sample->actual, | |
| 519 sizeof (Sound_AudioInfo)); | |
| 520 | |
|
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521 if (Sound_BuildAudioCVT(&internal->sdlcvt, |
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522 sample->actual.format, |
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523 sample->actual.channels, |
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524 sample->actual.rate, |
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525 desired.format, |
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526 desired.channels, |
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527 desired.rate) == -1) |
| 4 | 528 { |
| 529 Sound_SetError(SDL_GetError()); | |
| 530 funcs->close(sample); | |
| 531 SDL_RWseek(internal->rw, pos, SEEK_SET); /* set for next try... */ | |
| 532 return(0); | |
| 533 } /* if */ | |
| 534 | |
| 535 if (internal->sdlcvt.len_mult > 1) | |
| 536 { | |
| 537 void *rc = realloc(sample->buffer, | |
|
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538 sample->buffer_size * internal->sdlcvt.len_mult); |
| 4 | 539 if (rc == NULL) |
| 540 { | |
| 541 funcs->close(sample); | |
| 542 SDL_RWseek(internal->rw, pos, SEEK_SET); /* set for next try... */ | |
| 543 return(0); | |
| 544 } /* if */ | |
| 545 | |
| 546 sample->buffer = rc; | |
| 547 } /* if */ | |
| 548 | |
| 549 /* these pointers are all one and the same. */ | |
| 550 memcpy(&sample->desired, &desired, sizeof (Sound_AudioInfo)); | |
| 551 internal->sdlcvt.buf = internal->buffer = sample->buffer; | |
| 552 internal->buffer_size = sample->buffer_size / internal->sdlcvt.len_mult; | |
| 553 internal->sdlcvt.len = internal->buffer_size; | |
| 554 | |
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555 /* Prepend our new Sound_Sample to the sample_list... */ |
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556 SDL_LockMutex(samplelist_mutex); |
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557 internal->next = sample_list; |
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558 if (sample_list != NULL) |
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559 ((Sound_SampleInternal *) sample_list->opaque)->prev = sample; |
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560 sample_list = sample; |
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561 SDL_UnlockMutex(samplelist_mutex); |
| 4 | 562 |
|
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563 SNDDBG(("New sample DESIRED format: %s format, %d rate, %d channels.\n", |
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564 fmt_to_str(sample->desired.format), |
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565 sample->desired.rate, |
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566 sample->desired.channels)); |
|
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567 |
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568 SNDDBG(("New sample ACTUAL format: %s format, %d rate, %d channels.\n", |
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569 fmt_to_str(sample->actual.format), |
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570 sample->actual.rate, |
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571 sample->actual.channels)); |
|
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572 |
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573 SNDDBG(("On-the-fly conversion: %s.\n", |
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574 internal->sdlcvt.needed ? "ENABLED" : "DISABLED")); |
|
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575 |
| 4 | 576 return(1); |
| 577 } /* init_sample */ | |
| 578 | |
| 579 | |
| 580 Sound_Sample *Sound_NewSample(SDL_RWops *rw, const char *ext, | |
| 581 Sound_AudioInfo *desired, Uint32 bSize) | |
| 582 { | |
| 583 Sound_Sample *retval; | |
|
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584 decoder_element *decoder; |
| 4 | 585 |
| 586 /* sanity checks. */ | |
| 587 BAIL_IF_MACRO(!initialized, ERR_NOT_INITIALIZED, NULL); | |
| 588 BAIL_IF_MACRO(rw == NULL, ERR_INVALID_ARGUMENT, NULL); | |
| 589 | |
| 590 retval = alloc_sample(rw, desired, bSize); | |
| 591 if (!retval) | |
| 592 return(NULL); /* alloc_sample() sets error message... */ | |
| 593 | |
| 594 if (ext != NULL) | |
| 595 { | |
|
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596 for (decoder = &decoders[0]; decoder->funcs != NULL; decoder++) |
| 4 | 597 { |
|
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598 if (decoder->available) |
| 4 | 599 { |
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600 const char **decoderExt = decoder->funcs->info.extensions; |
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601 while (*decoderExt) |
|
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602 { |
|
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603 if (__Sound_strcasecmp(*decoderExt, ext) == 0) |
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604 { |
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605 if (init_sample(decoder->funcs, retval, ext, desired)) |
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606 return(retval); |
|
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607 break; /* done with this decoder either way. */ |
|
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608 } /* if */ |
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609 decoderExt++; |
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610 } /* while */ |
| 4 | 611 } /* if */ |
| 612 } /* for */ | |
| 613 } /* if */ | |
| 614 | |
| 615 /* no direct extension match? Try everything we've got... */ | |
|
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616 for (decoder = &decoders[0]; decoder->funcs != NULL; decoder++) |
| 4 | 617 { |
|
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618 if (decoder->available) |
|
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619 { |
|
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620 int should_try = 1; |
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621 const char **decoderExt = decoder->funcs->info.extensions; |
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622 |
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623 /* skip if we would have tried decoder above... */ |
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624 while (*decoderExt) |
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625 { |
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626 if (__Sound_strcasecmp(*decoderExt, ext) == 0) |
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627 { |
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628 should_try = 0; |
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629 break; |
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630 } /* if */ |
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631 decoderExt++; |
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632 } /* while */ |
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633 |
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634 if (should_try) |
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635 { |
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636 if (init_sample(decoder->funcs, retval, ext, desired)) |
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637 return(retval); |
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638 } /* if */ |
|
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639 } /* if */ |
| 4 | 640 } /* for */ |
| 641 | |
| 642 /* nothing could handle the sound data... */ | |
| 643 free(retval->opaque); | |
| 644 if (retval->buffer != NULL) | |
| 645 free(retval->buffer); | |
| 646 free(retval); | |
| 647 SDL_RWclose(rw); | |
| 648 Sound_SetError(ERR_UNSUPPORTED_FORMAT); | |
| 649 return(NULL); | |
| 650 } /* Sound_NewSample */ | |
| 651 | |
| 652 | |
| 653 Sound_Sample *Sound_NewSampleFromFile(const char *filename, | |
| 654 Sound_AudioInfo *desired, | |
| 655 Uint32 bufferSize) | |
| 656 { | |
| 657 const char *ext; | |
| 658 SDL_RWops *rw; | |
| 659 | |
| 660 BAIL_IF_MACRO(!initialized, ERR_NOT_INITIALIZED, NULL); | |
| 661 BAIL_IF_MACRO(filename == NULL, ERR_INVALID_ARGUMENT, NULL); | |
| 662 | |
| 663 ext = strrchr(filename, '.'); | |
| 664 rw = SDL_RWFromFile(filename, "rb"); | |
| 665 BAIL_IF_MACRO(rw == NULL, SDL_GetError(), NULL); | |
| 666 | |
| 667 if (ext != NULL) | |
| 668 ext++; | |
| 669 | |
| 670 return(Sound_NewSample(rw, ext, desired, bufferSize)); | |
| 671 } /* Sound_NewSampleFromFile */ | |
| 672 | |
| 673 | |
| 674 void Sound_FreeSample(Sound_Sample *sample) | |
| 675 { | |
| 676 Sound_SampleInternal *internal; | |
| 677 | |
| 678 if (!initialized) | |
| 679 { | |
| 680 Sound_SetError(ERR_NOT_INITIALIZED); | |
| 681 return; | |
| 682 } /* if */ | |
| 683 | |
| 684 if (sample == NULL) | |
| 685 { | |
| 686 Sound_SetError(ERR_INVALID_ARGUMENT); | |
| 687 return; | |
| 688 } /* if */ | |
| 689 | |
| 690 internal = (Sound_SampleInternal *) sample->opaque; | |
| 691 | |
|
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692 SDL_LockMutex(samplelist_mutex); |
| 4 | 693 |
|
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694 /* update the sample_list... */ |
| 4 | 695 if (internal->prev != NULL) |
| 696 { | |
| 697 Sound_SampleInternal *prevInternal; | |
| 698 prevInternal = (Sound_SampleInternal *) internal->prev->opaque; | |
| 699 prevInternal->next = internal->next; | |
| 700 } /* if */ | |
| 701 else | |
| 702 { | |
|
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703 assert(sample_list == sample); |
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704 sample_list = internal->next; |
| 4 | 705 } /* else */ |
| 706 | |
| 707 if (internal->next != NULL) | |
| 708 { | |
| 709 Sound_SampleInternal *nextInternal; | |
| 710 nextInternal = (Sound_SampleInternal *) internal->next->opaque; | |
| 711 nextInternal->prev = internal->prev; | |
| 712 } /* if */ | |
| 713 | |
|
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714 SDL_UnlockMutex(samplelist_mutex); |
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715 |
| 4 | 716 /* nuke it... */ |
|
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717 internal->funcs->close(sample); |
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718 |
| 4 | 719 if (internal->rw != NULL) /* this condition is a "just in case" thing. */ |
| 720 SDL_RWclose(internal->rw); | |
|
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721 |
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722 if ((internal->buffer != NULL) && (internal->buffer != sample->buffer)) |
| 4 | 723 free(internal->buffer); |
|
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724 |
| 4 | 725 free(internal); |
|
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726 |
| 4 | 727 if (sample->buffer != NULL) |
| 728 free(sample->buffer); | |
|
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729 |
| 4 | 730 free(sample); |
| 731 } /* Sound_FreeSample */ | |
| 732 | |
| 733 | |
| 734 int Sound_SetBufferSize(Sound_Sample *sample, Uint32 newSize) | |
| 735 { | |
| 736 void *newBuf = NULL; | |
| 737 Sound_SampleInternal *internal = NULL; | |
| 738 | |
| 739 BAIL_IF_MACRO(!initialized, ERR_NOT_INITIALIZED, 0); | |
| 740 BAIL_IF_MACRO(sample == NULL, ERR_INVALID_ARGUMENT, 0); | |
| 741 internal = ((Sound_SampleInternal *) sample->opaque); | |
| 742 newBuf = realloc(sample->buffer, newSize * internal->sdlcvt.len_mult); | |
| 743 BAIL_IF_MACRO(newBuf == NULL, ERR_OUT_OF_MEMORY, 0); | |
| 744 | |
| 745 internal->sdlcvt.buf = internal->buffer = sample->buffer = newBuf; | |
| 746 sample->buffer_size = newSize; | |
| 747 internal->buffer_size = newSize / internal->sdlcvt.len_mult; | |
| 748 internal->sdlcvt.len = internal->buffer_size; | |
| 749 | |
| 750 return(1); | |
| 751 } /* Sound_SetBufferSize */ | |
| 752 | |
| 753 | |
| 754 Uint32 Sound_Decode(Sound_Sample *sample) | |
| 755 { | |
| 756 Sound_SampleInternal *internal = NULL; | |
| 757 Uint32 retval = 0; | |
| 758 | |
| 759 /* a boatload of sanity checks... */ | |
| 760 BAIL_IF_MACRO(!initialized, ERR_NOT_INITIALIZED, 0); | |
| 761 BAIL_IF_MACRO(sample == NULL, ERR_INVALID_ARGUMENT, 0); | |
| 762 BAIL_IF_MACRO(sample->flags & SOUND_SAMPLEFLAG_ERROR, ERR_PREV_ERROR, 0); | |
| 763 BAIL_IF_MACRO(sample->flags & SOUND_SAMPLEFLAG_EOF, ERR_PREV_EOF, 0); | |
| 764 | |
| 765 internal = (Sound_SampleInternal *) sample->opaque; | |
| 766 | |
| 767 assert(sample->buffer != NULL); | |
| 768 assert(sample->buffer_size > 0); | |
| 769 assert(internal->buffer != NULL); | |
| 770 assert(internal->buffer_size > 0); | |
| 771 | |
| 772 /* reset EAGAIN. Decoder can flip it back on if it needs to. */ | |
| 773 sample->flags &= !SOUND_SAMPLEFLAG_EAGAIN; | |
| 774 retval = internal->funcs->read(sample); | |
|
37
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Added AIFF entry, and (for now) some multiple-streams-in-one-rwops support.
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|
775 |
|
163
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|
776 if (retval > 0 && internal->sdlcvt.needed) |
| 4 | 777 { |
| 778 internal->sdlcvt.len = retval; | |
|
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|
779 Sound_ConvertAudio(&internal->sdlcvt); |
|
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|
780 retval = internal->sdlcvt.len_cvt; |
| 4 | 781 } /* if */ |
| 782 | |
| 783 return(retval); | |
| 784 } /* Sound_Decode */ | |
| 785 | |
| 786 | |
| 787 Uint32 Sound_DecodeAll(Sound_Sample *sample) | |
| 788 { | |
| 789 Sound_SampleInternal *internal = NULL; | |
| 790 void *buf = NULL; | |
| 791 Uint32 newBufSize = 0; | |
| 792 | |
| 793 BAIL_IF_MACRO(!initialized, ERR_NOT_INITIALIZED, 0); | |
|
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|
794 BAIL_IF_MACRO(sample->flags & SOUND_SAMPLEFLAG_EOF, ERR_PREV_EOF, 0); |
|
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|
795 BAIL_IF_MACRO(sample->flags & SOUND_SAMPLEFLAG_ERROR, ERR_PREV_ERROR, 0); |
| 4 | 796 |
| 797 internal = (Sound_SampleInternal *) sample->opaque; | |
| 798 | |
| 799 while ( ((sample->flags & SOUND_SAMPLEFLAG_EOF) == 0) && | |
| 800 ((sample->flags & SOUND_SAMPLEFLAG_ERROR) == 0) ) | |
| 801 { | |
|
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|
802 Uint32 br = Sound_Decode(sample); |
|
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|
803 void *ptr = realloc(buf, newBufSize + br); |
| 4 | 804 if (ptr == NULL) |
| 805 { | |
| 806 sample->flags |= SOUND_SAMPLEFLAG_ERROR; | |
| 807 Sound_SetError(ERR_OUT_OF_MEMORY); | |
| 808 } /* if */ | |
| 809 else | |
| 810 { | |
|
167
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|
811 buf = ptr; |
| 4 | 812 memcpy( ((char *) buf) + newBufSize, sample->buffer, br ); |
| 813 newBufSize += br; | |
| 814 } /* else */ | |
| 815 } /* while */ | |
| 816 | |
|
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817 if (buf == NULL) /* ...in case first call to realloc() fails... */ |
|
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|
818 return(sample->buffer_size); |
|
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|
819 |
|
167
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820 if (internal->buffer != sample->buffer) |
|
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821 free(internal->buffer); |
|
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822 |
| 4 | 823 free(sample->buffer); |
|
167
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824 |
|
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|
825 internal->sdlcvt.buf = internal->buffer = sample->buffer = buf; |
| 4 | 826 sample->buffer_size = newBufSize; |
| 827 internal->buffer_size = newBufSize / internal->sdlcvt.len_mult; | |
|
167
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828 internal->sdlcvt.len = internal->buffer_size; |
| 4 | 829 |
| 830 return(newBufSize); | |
| 831 } /* Sound_DecodeAll */ | |
| 832 | |
|
223
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Sound_Rewind() support code.
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|
833 |
|
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Sound_Rewind() support code.
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|
834 int Sound_Rewind(Sound_Sample *sample) |
|
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|
835 { |
|
249186e31431
Sound_Rewind() support code.
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|
836 Sound_SampleInternal *internal; |
|
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|
837 BAIL_IF_MACRO(!initialized, ERR_NOT_INITIALIZED, 0); |
|
249186e31431
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|
838 |
|
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|
839 internal = (Sound_SampleInternal *) sample->opaque; |
|
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|
840 if (!internal->funcs->rewind(sample)) |
|
249186e31431
Sound_Rewind() support code.
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|
841 { |
|
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Sound_Rewind() support code.
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|
842 sample->flags |= SOUND_SAMPLEFLAG_ERROR; |
|
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843 return(0); |
|
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|
844 } /* if */ |
|
249186e31431
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|
845 |
|
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|
846 sample->flags &= !SOUND_SAMPLEFLAG_EAGAIN; |
|
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847 sample->flags &= !SOUND_SAMPLEFLAG_ERROR; |
|
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|
848 sample->flags &= !SOUND_SAMPLEFLAG_EOF; |
|
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|
849 return(1); |
|
249186e31431
Sound_Rewind() support code.
Ryan C. Gordon <icculus@icculus.org>
parents:
219
diff
changeset
|
850 } /* Sound_Rewind */ |
|
249186e31431
Sound_Rewind() support code.
Ryan C. Gordon <icculus@icculus.org>
parents:
219
diff
changeset
|
851 |
|
249186e31431
Sound_Rewind() support code.
Ryan C. Gordon <icculus@icculus.org>
parents:
219
diff
changeset
|
852 |
| 4 | 853 /* end of SDL_sound.c ... */ |
| 854 |