Mercurial > SDL_sound_CoreAudio
annotate SDL_sound.c @ 223:249186e31431
Sound_Rewind() support code.
| author | Ryan C. Gordon <icculus@icculus.org> |
|---|---|
| date | Thu, 17 Jan 2002 20:55:46 +0000 |
| parents | ca3483f4cfec |
| children | 57e16a6d244f |
| 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_MIKMOD) |
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113 { 0, &__Sound_DecoderFunctions_MIKMOD }, |
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114 #endif |
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115 |
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116 #if (defined SOUND_SUPPORTS_MODPLUG) |
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117 { 0, &__Sound_DecoderFunctions_MODPLUG }, |
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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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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 errorAvailable; |
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167 char errorString[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 *errorMessages = NULL; |
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172 static SDL_mutex *errorlist_mutex = NULL; |
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173 |
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174 /* !!! FIXME: This needs a mutex. */ |
| 4 | 175 static Sound_Sample *samplesList = NULL; /* this is a linked list. */ |
| 176 static const Sound_DecoderInfo **available_decoders = NULL; | |
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177 static int initialized = 0; |
| 4 | 178 |
| 179 | |
| 180 /* functions ... */ | |
| 181 | |
| 182 void Sound_GetLinkedVersion(Sound_Version *ver) | |
| 183 { | |
| 184 if (ver != NULL) | |
| 185 { | |
| 186 ver->major = SOUND_VER_MAJOR; | |
| 187 ver->minor = SOUND_VER_MINOR; | |
| 188 ver->patch = SOUND_VER_PATCH; | |
| 189 } /* if */ | |
| 190 } /* Sound_GetLinkedVersion */ | |
| 191 | |
| 192 | |
| 193 int Sound_Init(void) | |
| 194 { | |
| 195 size_t i; | |
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196 size_t pos = 0; |
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197 size_t total = sizeof (decoders) / sizeof (decoders[0]); |
| 4 | 198 BAIL_IF_MACRO(initialized, ERR_IS_INITIALIZED, 0); |
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199 |
| 4 | 200 samplesList = NULL; |
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201 errorMessages = NULL; |
| 4 | 202 |
| 203 SDL_Init(SDL_INIT_AUDIO); | |
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204 errorlist_mutex = SDL_CreateMutex(); |
| 4 | 205 |
| 206 available_decoders = (const Sound_DecoderInfo **) | |
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207 malloc((total) * sizeof (Sound_DecoderInfo *)); |
| 4 | 208 BAIL_IF_MACRO(available_decoders == NULL, ERR_OUT_OF_MEMORY, 0); |
| 209 | |
|
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210 for (i = 0; decoders[i].funcs != NULL; i++) |
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211 { |
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212 decoders[i].available = decoders[i].funcs->init(); |
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213 if (decoders[i].available) |
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214 { |
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215 available_decoders[pos] = &(decoders[i].funcs->info); |
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216 pos++; |
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217 } /* if */ |
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218 } /* for */ |
| 4 | 219 |
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220 available_decoders[pos] = NULL; |
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221 |
| 4 | 222 initialized = 1; |
| 223 return(1); | |
| 224 } /* Sound_Init */ | |
| 225 | |
| 226 | |
| 227 int Sound_Quit(void) | |
| 228 { | |
|
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229 ErrMsg *err; |
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230 ErrMsg *nexterr = NULL; |
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231 size_t i; |
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232 |
| 4 | 233 BAIL_IF_MACRO(!initialized, ERR_NOT_INITIALIZED, 0); |
| 234 | |
| 235 while (((volatile Sound_Sample *) samplesList) != NULL) | |
| 236 Sound_FreeSample(samplesList); | |
| 237 | |
|
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238 samplesList = NULL; |
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239 |
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240 for (i = 0; decoders[i].funcs != NULL; i++) |
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241 { |
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242 if (decoders[i].available) |
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243 { |
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244 decoders[i].funcs->quit(); |
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245 decoders[i].available = 0; |
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246 } /* if */ |
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247 } /* for */ |
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248 |
| 4 | 249 if (available_decoders != NULL) |
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250 free((void *) available_decoders); |
| 4 | 251 available_decoders = NULL; |
| 252 | |
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253 /* clean up error state for each thread... */ |
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254 SDL_LockMutex(errorlist_mutex); |
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255 for (err = errorMessages; err != NULL; err = nexterr) |
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256 { |
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257 nexterr = err->next; |
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258 free(err); |
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259 } /* for */ |
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260 SDL_UnlockMutex(errorlist_mutex); |
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261 SDL_DestroyMutex(errorlist_mutex); |
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262 errorMessages = NULL; |
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263 errorlist_mutex = NULL; |
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264 |
| 4 | 265 initialized = 0; |
| 266 return(1); | |
| 267 } /* Sound_Quit */ | |
| 268 | |
| 269 | |
| 270 const Sound_DecoderInfo **Sound_AvailableDecoders(void) | |
| 271 { | |
| 272 return(available_decoders); /* READ. ONLY. */ | |
| 273 } /* Sound_AvailableDecoders */ | |
| 274 | |
| 275 | |
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276 static ErrMsg *findErrorForCurrentThread(void) |
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277 { |
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278 ErrMsg *i; |
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279 Uint32 tid; |
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280 |
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281 if (errorMessages != NULL) |
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282 { |
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283 tid = SDL_ThreadID(); |
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284 |
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285 SDL_LockMutex(errorlist_mutex); |
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286 for (i = errorMessages; i != NULL; i = i->next) |
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287 { |
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288 if (i->tid == tid) |
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289 { |
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290 SDL_UnlockMutex(errorlist_mutex); |
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291 return(i); |
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292 } /* if */ |
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293 } /* for */ |
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294 SDL_UnlockMutex(errorlist_mutex); |
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295 } /* if */ |
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296 |
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297 return(NULL); /* no error available. */ |
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298 } /* findErrorForCurrentThread */ |
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299 |
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300 |
| 4 | 301 const char *Sound_GetError(void) |
| 302 { | |
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303 const char *retval = NULL; |
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304 ErrMsg *err = findErrorForCurrentThread(); |
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305 if ((err != NULL) && (err->errorAvailable)) |
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306 { |
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307 retval = err->errorString; |
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308 err->errorAvailable = 0; |
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309 } /* if */ |
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310 |
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311 return(retval); |
| 4 | 312 } /* Sound_GetError */ |
| 313 | |
| 314 | |
| 315 void Sound_ClearError(void) | |
| 316 { | |
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317 ErrMsg *err = findErrorForCurrentThread(); |
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318 if (err != NULL) |
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319 err->errorAvailable = 0; |
| 4 | 320 } /* Sound_ClearError */ |
| 321 | |
| 322 | |
| 323 /* | |
| 324 * This is declared in the internal header. | |
| 325 */ | |
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326 void Sound_SetError(const char *str) |
| 4 | 327 { |
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328 ErrMsg *err; |
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329 |
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330 if (str == NULL) |
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331 return; |
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332 |
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333 SNDDBG(("Sound_SetError(\"%s\");\n", str)); |
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334 |
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335 err = findErrorForCurrentThread(); |
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336 if (err == NULL) |
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337 { |
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338 err = (ErrMsg *) malloc(sizeof (ErrMsg)); |
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339 if (err == NULL) |
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340 return; /* uhh...? */ |
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341 |
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342 memset((void *) err, '\0', sizeof (ErrMsg)); |
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343 err->tid = SDL_ThreadID(); |
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344 |
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345 SDL_LockMutex(errorlist_mutex); |
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346 err->next = errorMessages; |
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347 errorMessages = err; |
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348 SDL_UnlockMutex(errorlist_mutex); |
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349 } /* if */ |
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350 |
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351 err->errorAvailable = 1; |
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352 strncpy(err->errorString, str, sizeof (err->errorString)); |
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353 err->errorString[sizeof (err->errorString) - 1] = '\0'; |
| 4 | 354 } /* Sound_SetError */ |
| 355 | |
| 356 | |
| 357 /* | |
| 358 * -ansi and -pedantic flags prevent use of strcasecmp() on Linux, and | |
| 359 * I honestly don't want to mess around with figuring out if a given | |
| 360 * platform has "strcasecmp", "stricmp", or | |
| 361 * "compare_two_damned_strings_case_insensitive", which I hear is in the | |
| 362 * next release of Carbon. :) This is exported so decoders may use it if | |
| 363 * they like. | |
| 364 */ | |
| 365 int __Sound_strcasecmp(const char *x, const char *y) | |
| 366 { | |
| 367 int ux, uy; | |
| 368 | |
|
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369 if (x == y) /* same pointer? Both NULL? */ |
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370 return(0); |
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371 |
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372 if (x == NULL) |
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373 return(-1); |
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374 |
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375 if (y == NULL) |
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376 return(1); |
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377 |
| 4 | 378 do |
| 379 { | |
| 380 ux = toupper((int) *x); | |
| 381 uy = toupper((int) *y); | |
| 382 if (ux > uy) | |
| 383 return(1); | |
| 384 else if (ux < uy) | |
| 385 return(-1); | |
| 386 x++; | |
| 387 y++; | |
| 388 } while ((ux) && (uy)); | |
| 389 | |
| 390 return(0); | |
| 391 } /* __Sound_strcasecmp */ | |
| 392 | |
| 393 | |
| 394 /* | |
| 395 * Allocate a Sound_Sample, and fill in most of its fields. Those that need | |
| 396 * to be filled in later, by a decoder, will be initialized to zero. | |
| 397 */ | |
| 398 static Sound_Sample *alloc_sample(SDL_RWops *rw, Sound_AudioInfo *desired, | |
| 399 Uint32 bufferSize) | |
| 400 { | |
| 401 Sound_Sample *retval = malloc(sizeof (Sound_Sample)); | |
| 402 Sound_SampleInternal *internal = malloc(sizeof (Sound_SampleInternal)); | |
| 403 if ((retval == NULL) || (internal == NULL)) | |
| 404 { | |
| 405 Sound_SetError(ERR_OUT_OF_MEMORY); | |
| 406 if (retval) | |
| 407 free(retval); | |
| 408 if (internal) | |
| 409 free(internal); | |
| 410 | |
| 411 return(NULL); | |
| 412 } /* if */ | |
| 413 | |
| 414 memset(retval, '\0', sizeof (Sound_Sample)); | |
| 415 memset(internal, '\0', sizeof (Sound_SampleInternal)); | |
| 416 | |
| 417 assert(bufferSize > 0); | |
| 418 retval->buffer = malloc(bufferSize); /* pure ugly. */ | |
| 419 if (!retval->buffer) | |
| 420 { | |
| 421 Sound_SetError(ERR_OUT_OF_MEMORY); | |
| 422 free(internal); | |
| 423 free(retval); | |
| 424 return(NULL); | |
| 425 } /* if */ | |
| 426 memset(retval->buffer, '\0', bufferSize); | |
| 427 retval->buffer_size = bufferSize; | |
| 428 | |
| 429 if (desired != NULL) | |
| 430 memcpy(&retval->desired, desired, sizeof (Sound_AudioInfo)); | |
| 431 | |
| 432 internal->rw = rw; | |
| 433 retval->opaque = internal; | |
| 434 return(retval); | |
| 435 } /* alloc_sample */ | |
| 436 | |
| 437 | |
|
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438 #if (defined DEBUG_CHATTER) |
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439 static __inline__ const char *fmt_to_str(Uint16 fmt) |
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440 { |
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441 switch(fmt) |
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442 { |
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443 case AUDIO_U8: |
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444 return("U8"); |
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445 case AUDIO_S8: |
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446 return("S8"); |
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447 case AUDIO_U16LSB: |
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448 return("U16LSB"); |
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449 case AUDIO_S16LSB: |
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450 return("S16LSB"); |
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451 case AUDIO_U16MSB: |
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452 return("U16MSB"); |
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453 case AUDIO_S16MSB: |
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454 return("S16MSB"); |
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455 } /* switch */ |
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456 |
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457 return("Unknown"); |
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458 } /* fmt_to_str */ |
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459 #endif |
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460 |
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461 |
| 4 | 462 /* |
| 463 * The bulk of the Sound_NewSample() work is done here... | |
| 464 * Ask the specified decoder to handle the data in (rw), and if | |
| 465 * so, construct the Sound_Sample. Otherwise, try to wind (rw)'s stream | |
| 466 * back to where it was, and return false. | |
| 467 * | |
| 468 * !!! FIXME: This is big, ugly, nasty, and smelly. | |
| 469 */ | |
| 470 static int init_sample(const Sound_DecoderFunctions *funcs, | |
| 471 Sound_Sample *sample, const char *ext, | |
| 472 Sound_AudioInfo *_desired) | |
| 473 { | |
| 474 Sound_SampleInternal *internal = (Sound_SampleInternal *) sample->opaque; | |
|
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475 Sound_AudioInfo desired; |
| 4 | 476 int pos = SDL_RWtell(internal->rw); /* !!! FIXME: Int? Really? */ |
| 477 | |
| 478 /* fill in the funcs for this decoder... */ | |
| 479 sample->decoder = &funcs->info; | |
| 480 internal->funcs = funcs; | |
| 481 if (!funcs->open(sample, ext)) | |
| 482 { | |
| 483 SDL_RWseek(internal->rw, pos, SEEK_SET); /* set for next try... */ | |
| 484 return(0); | |
| 485 } /* if */ | |
| 486 | |
| 487 /* success; we've got a decoder! */ | |
| 488 | |
| 489 /* Now we need to set up the conversion buffer... */ | |
| 490 | |
| 491 memcpy(&desired, (_desired != NULL) ? _desired : &sample->actual, | |
| 492 sizeof (Sound_AudioInfo)); | |
| 493 | |
|
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494 if (Sound_BuildAudioCVT(&internal->sdlcvt, |
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495 sample->actual.format, |
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496 sample->actual.channels, |
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497 sample->actual.rate, |
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498 desired.format, |
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499 desired.channels, |
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500 desired.rate) == -1) |
| 4 | 501 { |
| 502 Sound_SetError(SDL_GetError()); | |
| 503 funcs->close(sample); | |
| 504 SDL_RWseek(internal->rw, pos, SEEK_SET); /* set for next try... */ | |
| 505 return(0); | |
| 506 } /* if */ | |
| 507 | |
| 508 if (internal->sdlcvt.len_mult > 1) | |
| 509 { | |
| 510 void *rc = realloc(sample->buffer, | |
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511 sample->buffer_size * internal->sdlcvt.len_mult); |
| 4 | 512 if (rc == NULL) |
| 513 { | |
| 514 funcs->close(sample); | |
| 515 SDL_RWseek(internal->rw, pos, SEEK_SET); /* set for next try... */ | |
| 516 return(0); | |
| 517 } /* if */ | |
| 518 | |
| 519 sample->buffer = rc; | |
| 520 } /* if */ | |
| 521 | |
| 522 /* these pointers are all one and the same. */ | |
| 523 memcpy(&sample->desired, &desired, sizeof (Sound_AudioInfo)); | |
| 524 internal->sdlcvt.buf = internal->buffer = sample->buffer; | |
| 525 internal->buffer_size = sample->buffer_size / internal->sdlcvt.len_mult; | |
| 526 internal->sdlcvt.len = internal->buffer_size; | |
| 527 | |
| 528 /* Prepend our new Sound_Sample to the samplesList... */ | |
| 529 if (samplesList != NULL) | |
| 530 { | |
| 531 internal->next = samplesList; | |
| 532 if (samplesList != NULL) | |
| 533 internal->prev = sample; | |
| 534 } /* if */ | |
| 535 samplesList = sample; | |
| 536 | |
|
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537 SNDDBG(("New sample DESIRED format: %s format, %d rate, %d channels.\n", |
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538 fmt_to_str(sample->desired.format), |
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539 sample->desired.rate, |
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540 sample->desired.channels)); |
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541 |
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542 SNDDBG(("New sample ACTUAL format: %s format, %d rate, %d channels.\n", |
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543 fmt_to_str(sample->actual.format), |
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544 sample->actual.rate, |
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545 sample->actual.channels)); |
|
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546 |
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547 SNDDBG(("On-the-fly conversion: %s.\n", |
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548 internal->sdlcvt.needed ? "ENABLED" : "DISABLED")); |
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549 |
| 4 | 550 return(1); |
| 551 } /* init_sample */ | |
| 552 | |
| 553 | |
| 554 Sound_Sample *Sound_NewSample(SDL_RWops *rw, const char *ext, | |
| 555 Sound_AudioInfo *desired, Uint32 bSize) | |
| 556 { | |
| 557 Sound_Sample *retval; | |
|
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558 decoder_element *decoder; |
| 4 | 559 |
| 560 /* sanity checks. */ | |
| 561 BAIL_IF_MACRO(!initialized, ERR_NOT_INITIALIZED, NULL); | |
| 562 BAIL_IF_MACRO(rw == NULL, ERR_INVALID_ARGUMENT, NULL); | |
| 563 | |
| 564 retval = alloc_sample(rw, desired, bSize); | |
| 565 if (!retval) | |
| 566 return(NULL); /* alloc_sample() sets error message... */ | |
| 567 | |
| 568 if (ext != NULL) | |
| 569 { | |
|
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570 for (decoder = &decoders[0]; decoder->funcs != NULL; decoder++) |
| 4 | 571 { |
|
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572 if (decoder->available) |
| 4 | 573 { |
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574 const char **decoderExt = decoder->funcs->info.extensions; |
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575 while (*decoderExt) |
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576 { |
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577 if (__Sound_strcasecmp(*decoderExt, ext) == 0) |
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578 { |
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579 if (init_sample(decoder->funcs, retval, ext, desired)) |
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580 return(retval); |
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581 } /* if */ |
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582 decoderExt++; |
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583 } /* while */ |
| 4 | 584 } /* if */ |
| 585 } /* for */ | |
| 586 } /* if */ | |
| 587 | |
| 588 /* no direct extension match? Try everything we've got... */ | |
|
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589 for (decoder = &decoders[0]; decoder->funcs != NULL; decoder++) |
| 4 | 590 { |
|
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591 if (decoder->available) |
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592 { |
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593 if (init_sample(decoder->funcs, retval, ext, desired)) |
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594 return(retval); |
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595 } /* if */ |
| 4 | 596 } /* for */ |
| 597 | |
| 598 /* nothing could handle the sound data... */ | |
| 599 free(retval->opaque); | |
| 600 if (retval->buffer != NULL) | |
| 601 free(retval->buffer); | |
| 602 free(retval); | |
| 603 SDL_RWclose(rw); | |
| 604 Sound_SetError(ERR_UNSUPPORTED_FORMAT); | |
| 605 return(NULL); | |
| 606 } /* Sound_NewSample */ | |
| 607 | |
| 608 | |
| 609 Sound_Sample *Sound_NewSampleFromFile(const char *filename, | |
| 610 Sound_AudioInfo *desired, | |
| 611 Uint32 bufferSize) | |
| 612 { | |
| 613 const char *ext; | |
| 614 SDL_RWops *rw; | |
| 615 | |
| 616 BAIL_IF_MACRO(!initialized, ERR_NOT_INITIALIZED, NULL); | |
| 617 BAIL_IF_MACRO(filename == NULL, ERR_INVALID_ARGUMENT, NULL); | |
| 618 | |
| 619 ext = strrchr(filename, '.'); | |
| 620 rw = SDL_RWFromFile(filename, "rb"); | |
| 621 BAIL_IF_MACRO(rw == NULL, SDL_GetError(), NULL); | |
| 622 | |
| 623 if (ext != NULL) | |
| 624 ext++; | |
| 625 | |
| 626 return(Sound_NewSample(rw, ext, desired, bufferSize)); | |
| 627 } /* Sound_NewSampleFromFile */ | |
| 628 | |
| 629 | |
| 630 void Sound_FreeSample(Sound_Sample *sample) | |
| 631 { | |
| 632 Sound_SampleInternal *internal; | |
| 633 | |
| 634 if (!initialized) | |
| 635 { | |
| 636 Sound_SetError(ERR_NOT_INITIALIZED); | |
| 637 return; | |
| 638 } /* if */ | |
| 639 | |
| 640 if (sample == NULL) | |
| 641 { | |
| 642 Sound_SetError(ERR_INVALID_ARGUMENT); | |
| 643 return; | |
| 644 } /* if */ | |
| 645 | |
| 646 internal = (Sound_SampleInternal *) sample->opaque; | |
| 647 | |
| 648 internal->funcs->close(sample); | |
| 649 | |
| 650 /* update the samplesList... */ | |
| 651 if (internal->prev != NULL) | |
| 652 { | |
| 653 Sound_SampleInternal *prevInternal; | |
| 654 prevInternal = (Sound_SampleInternal *) internal->prev->opaque; | |
| 655 prevInternal->next = internal->next; | |
| 656 } /* if */ | |
| 657 else | |
| 658 { | |
| 659 assert(samplesList == sample); | |
| 660 samplesList = internal->next; | |
| 661 } /* else */ | |
| 662 | |
| 663 if (internal->next != NULL) | |
| 664 { | |
| 665 Sound_SampleInternal *nextInternal; | |
| 666 nextInternal = (Sound_SampleInternal *) internal->next->opaque; | |
| 667 nextInternal->prev = internal->prev; | |
| 668 } /* if */ | |
| 669 | |
| 670 /* nuke it... */ | |
| 671 if (internal->rw != NULL) /* this condition is a "just in case" thing. */ | |
| 672 SDL_RWclose(internal->rw); | |
|
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673 |
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674 if ((internal->buffer != NULL) && (internal->buffer != sample->buffer)) |
| 4 | 675 free(internal->buffer); |
|
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676 |
| 4 | 677 free(internal); |
|
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678 |
| 4 | 679 if (sample->buffer != NULL) |
| 680 free(sample->buffer); | |
|
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681 |
| 4 | 682 free(sample); |
| 683 } /* Sound_FreeSample */ | |
| 684 | |
| 685 | |
| 686 int Sound_SetBufferSize(Sound_Sample *sample, Uint32 newSize) | |
| 687 { | |
| 688 void *newBuf = NULL; | |
| 689 Sound_SampleInternal *internal = NULL; | |
| 690 | |
| 691 BAIL_IF_MACRO(!initialized, ERR_NOT_INITIALIZED, 0); | |
| 692 BAIL_IF_MACRO(sample == NULL, ERR_INVALID_ARGUMENT, 0); | |
| 693 internal = ((Sound_SampleInternal *) sample->opaque); | |
| 694 newBuf = realloc(sample->buffer, newSize * internal->sdlcvt.len_mult); | |
| 695 BAIL_IF_MACRO(newBuf == NULL, ERR_OUT_OF_MEMORY, 0); | |
| 696 | |
| 697 internal->sdlcvt.buf = internal->buffer = sample->buffer = newBuf; | |
| 698 sample->buffer_size = newSize; | |
| 699 internal->buffer_size = newSize / internal->sdlcvt.len_mult; | |
| 700 internal->sdlcvt.len = internal->buffer_size; | |
| 701 | |
| 702 return(1); | |
| 703 } /* Sound_SetBufferSize */ | |
| 704 | |
| 705 | |
| 706 Uint32 Sound_Decode(Sound_Sample *sample) | |
| 707 { | |
| 708 Sound_SampleInternal *internal = NULL; | |
| 709 Uint32 retval = 0; | |
| 710 | |
| 711 /* a boatload of sanity checks... */ | |
| 712 BAIL_IF_MACRO(!initialized, ERR_NOT_INITIALIZED, 0); | |
| 713 BAIL_IF_MACRO(sample == NULL, ERR_INVALID_ARGUMENT, 0); | |
| 714 BAIL_IF_MACRO(sample->flags & SOUND_SAMPLEFLAG_ERROR, ERR_PREV_ERROR, 0); | |
| 715 BAIL_IF_MACRO(sample->flags & SOUND_SAMPLEFLAG_EOF, ERR_PREV_EOF, 0); | |
| 716 | |
| 717 internal = (Sound_SampleInternal *) sample->opaque; | |
| 718 | |
| 719 assert(sample->buffer != NULL); | |
| 720 assert(sample->buffer_size > 0); | |
| 721 assert(internal->buffer != NULL); | |
| 722 assert(internal->buffer_size > 0); | |
| 723 | |
| 724 /* reset EAGAIN. Decoder can flip it back on if it needs to. */ | |
| 725 sample->flags &= !SOUND_SAMPLEFLAG_EAGAIN; | |
| 726 retval = internal->funcs->read(sample); | |
|
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727 |
|
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728 if (retval > 0 && internal->sdlcvt.needed) |
| 4 | 729 { |
| 730 internal->sdlcvt.len = retval; | |
|
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731 Sound_ConvertAudio(&internal->sdlcvt); |
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732 retval = internal->sdlcvt.len_cvt; |
| 4 | 733 } /* if */ |
| 734 | |
| 735 return(retval); | |
| 736 } /* Sound_Decode */ | |
| 737 | |
| 738 | |
| 739 Uint32 Sound_DecodeAll(Sound_Sample *sample) | |
| 740 { | |
| 741 Sound_SampleInternal *internal = NULL; | |
| 742 void *buf = NULL; | |
| 743 Uint32 newBufSize = 0; | |
| 744 | |
| 745 BAIL_IF_MACRO(!initialized, ERR_NOT_INITIALIZED, 0); | |
|
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746 BAIL_IF_MACRO(sample->flags & SOUND_SAMPLEFLAG_EOF, ERR_PREV_EOF, 0); |
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747 BAIL_IF_MACRO(sample->flags & SOUND_SAMPLEFLAG_ERROR, ERR_PREV_ERROR, 0); |
| 4 | 748 |
| 749 internal = (Sound_SampleInternal *) sample->opaque; | |
| 750 | |
| 751 while ( ((sample->flags & SOUND_SAMPLEFLAG_EOF) == 0) && | |
| 752 ((sample->flags & SOUND_SAMPLEFLAG_ERROR) == 0) ) | |
| 753 { | |
|
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754 Uint32 br = Sound_Decode(sample); |
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755 void *ptr = realloc(buf, newBufSize + br); |
| 4 | 756 if (ptr == NULL) |
| 757 { | |
| 758 sample->flags |= SOUND_SAMPLEFLAG_ERROR; | |
| 759 Sound_SetError(ERR_OUT_OF_MEMORY); | |
| 760 } /* if */ | |
| 761 else | |
| 762 { | |
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763 buf = ptr; |
| 4 | 764 memcpy( ((char *) buf) + newBufSize, sample->buffer, br ); |
| 765 newBufSize += br; | |
| 766 } /* else */ | |
| 767 } /* while */ | |
| 768 | |
|
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769 if (buf == NULL) /* ...in case first call to realloc() fails... */ |
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770 return(sample->buffer_size); |
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771 |
|
167
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772 if (internal->buffer != sample->buffer) |
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773 free(internal->buffer); |
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774 |
| 4 | 775 free(sample->buffer); |
|
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776 |
|
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777 internal->sdlcvt.buf = internal->buffer = sample->buffer = buf; |
| 4 | 778 sample->buffer_size = newBufSize; |
| 779 internal->buffer_size = newBufSize / internal->sdlcvt.len_mult; | |
|
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780 internal->sdlcvt.len = internal->buffer_size; |
| 4 | 781 |
| 782 return(newBufSize); | |
| 783 } /* Sound_DecodeAll */ | |
| 784 | |
|
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785 |
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786 int Sound_Rewind(Sound_Sample *sample) |
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787 { |
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788 Sound_SampleInternal *internal; |
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789 BAIL_IF_MACRO(!initialized, ERR_NOT_INITIALIZED, 0); |
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790 |
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791 internal = (Sound_SampleInternal *) sample->opaque; |
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792 if (!internal->funcs->rewind(sample)) |
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793 { |
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794 sample->flags |= SOUND_SAMPLEFLAG_ERROR; |
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795 return(0); |
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796 } /* if */ |
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797 |
|
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798 sample->flags &= !SOUND_SAMPLEFLAG_EAGAIN; |
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799 sample->flags &= !SOUND_SAMPLEFLAG_ERROR; |
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800 sample->flags &= !SOUND_SAMPLEFLAG_EOF; |
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801 return(1); |
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802 } /* Sound_Rewind */ |
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803 |
|
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804 |
| 4 | 805 /* end of SDL_sound.c ... */ |
| 806 |