Mercurial > SDL_sound_CoreAudio
annotate SDL_sound.c @ 341:3466dde3a846
Removed a FIXME.
| author | Ryan C. Gordon <icculus@icculus.org> |
|---|---|
| date | Wed, 22 May 2002 09:27:12 +0000 |
| parents | 5a72981b8cba |
| children | cbb15ecf423a |
| 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 | |
| 322 | 102 #if (defined SOUND_SUPPORTS_QUICKTIME) |
| 103 extern const Sound_DecoderFunctions __Sound_DecoderFunctions_QuickTime; | |
| 104 #endif | |
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105 |
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106 typedef struct |
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107 { |
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108 int available; |
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109 const Sound_DecoderFunctions *funcs; |
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110 } decoder_element; |
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111 |
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112 static decoder_element decoders[] = |
| 4 | 113 { |
| 262 | 114 #if (defined SOUND_SUPPORTS_SMPEG) |
| 115 { 0, &__Sound_DecoderFunctions_SMPEG }, | |
| 116 #endif | |
| 117 | |
| 118 #if (defined SOUND_SUPPORTS_MPGLIB) | |
| 119 { 0, &__Sound_DecoderFunctions_MPGLIB }, | |
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120 #endif |
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121 |
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122 #if (defined SOUND_SUPPORTS_MODPLUG) |
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123 { 0, &__Sound_DecoderFunctions_MODPLUG }, |
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124 #endif |
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125 |
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126 #if (defined SOUND_SUPPORTS_MIKMOD) |
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127 { 0, &__Sound_DecoderFunctions_MIKMOD }, |
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128 #endif |
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129 |
| 20 | 130 #if (defined SOUND_SUPPORTS_WAV) |
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131 { 0, &__Sound_DecoderFunctions_WAV }, |
| 20 | 132 #endif |
| 133 | |
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134 #if (defined SOUND_SUPPORTS_AIFF) |
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135 { 0, &__Sound_DecoderFunctions_AIFF }, |
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136 #endif |
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137 |
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138 #if (defined SOUND_SUPPORTS_AU) |
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139 { 0, &__Sound_DecoderFunctions_AU }, |
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140 #endif |
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141 |
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142 #if (defined SOUND_SUPPORTS_OGG) |
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143 { 0, &__Sound_DecoderFunctions_OGG }, |
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144 #endif |
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145 |
| 4 | 146 #if (defined SOUND_SUPPORTS_VOC) |
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147 { 0, &__Sound_DecoderFunctions_VOC }, |
| 4 | 148 #endif |
| 149 | |
| 150 #if (defined SOUND_SUPPORTS_RAW) | |
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151 { 0, &__Sound_DecoderFunctions_RAW }, |
| 4 | 152 #endif |
| 102 | 153 |
| 154 #if (defined SOUND_SUPPORTS_SHN) | |
| 155 { 0, &__Sound_DecoderFunctions_SHN }, | |
| 156 #endif | |
| 110 | 157 |
|
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158 #if (defined SOUND_SUPPORTS_FLAC) |
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159 { 0, &__Sound_DecoderFunctions_FLAC }, |
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160 #endif |
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161 |
| 110 | 162 #if (defined SOUND_SUPPORTS_MIDI) |
| 163 { 0, &__Sound_DecoderFunctions_MIDI }, | |
| 164 #endif | |
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165 |
| 322 | 166 #if (defined SOUND_SUPPORTS_QUICKTIME) |
| 167 { 0, &__Sound_DecoderFunctions_QuickTime }, | |
| 168 #endif | |
| 169 | |
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170 { 0, NULL } |
| 4 | 171 }; |
| 172 | |
| 173 | |
| 174 | |
| 175 /* General SDL_sound state ... */ | |
| 176 | |
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177 typedef struct __SOUND_ERRMSGTYPE__ |
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178 { |
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179 Uint32 tid; |
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180 int error_available; |
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181 char error_string[128]; |
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182 struct __SOUND_ERRMSGTYPE__ *next; |
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183 } ErrMsg; |
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184 |
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185 static ErrMsg *error_msgs = NULL; |
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186 static SDL_mutex *errorlist_mutex = NULL; |
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187 |
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188 static Sound_Sample *sample_list = NULL; /* this is a linked list. */ |
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189 static SDL_mutex *samplelist_mutex = NULL; |
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190 |
| 4 | 191 static const Sound_DecoderInfo **available_decoders = NULL; |
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192 static int initialized = 0; |
| 4 | 193 |
| 194 | |
| 195 /* functions ... */ | |
| 196 | |
| 197 void Sound_GetLinkedVersion(Sound_Version *ver) | |
| 198 { | |
| 199 if (ver != NULL) | |
| 200 { | |
| 201 ver->major = SOUND_VER_MAJOR; | |
| 202 ver->minor = SOUND_VER_MINOR; | |
| 203 ver->patch = SOUND_VER_PATCH; | |
| 204 } /* if */ | |
| 205 } /* Sound_GetLinkedVersion */ | |
| 206 | |
| 207 | |
| 208 int Sound_Init(void) | |
| 209 { | |
| 210 size_t i; | |
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211 size_t pos = 0; |
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212 size_t total = sizeof (decoders) / sizeof (decoders[0]); |
| 4 | 213 BAIL_IF_MACRO(initialized, ERR_IS_INITIALIZED, 0); |
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214 |
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215 sample_list = NULL; |
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216 error_msgs = NULL; |
| 4 | 217 |
| 218 available_decoders = (const Sound_DecoderInfo **) | |
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219 malloc((total) * sizeof (Sound_DecoderInfo *)); |
| 4 | 220 BAIL_IF_MACRO(available_decoders == NULL, ERR_OUT_OF_MEMORY, 0); |
| 221 | |
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222 SDL_Init(SDL_INIT_AUDIO); |
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223 |
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224 errorlist_mutex = SDL_CreateMutex(); |
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225 |
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226 for (i = 0; decoders[i].funcs != NULL; i++) |
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227 { |
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228 decoders[i].available = decoders[i].funcs->init(); |
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229 if (decoders[i].available) |
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230 { |
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231 available_decoders[pos] = &(decoders[i].funcs->info); |
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232 pos++; |
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233 } /* if */ |
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234 } /* for */ |
| 4 | 235 |
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236 available_decoders[pos] = NULL; |
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237 |
| 4 | 238 initialized = 1; |
| 239 return(1); | |
| 240 } /* Sound_Init */ | |
| 241 | |
| 242 | |
| 243 int Sound_Quit(void) | |
| 244 { | |
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245 ErrMsg *err; |
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246 ErrMsg *nexterr = NULL; |
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247 size_t i; |
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248 |
| 4 | 249 BAIL_IF_MACRO(!initialized, ERR_NOT_INITIALIZED, 0); |
| 250 | |
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251 while (((volatile Sound_Sample *) sample_list) != NULL) |
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252 Sound_FreeSample(sample_list); |
| 4 | 253 |
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254 initialized = 0; |
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255 |
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256 SDL_DestroyMutex(samplelist_mutex); |
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257 samplelist_mutex = NULL; |
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258 sample_list = NULL; |
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259 |
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260 for (i = 0; decoders[i].funcs != NULL; i++) |
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261 { |
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262 if (decoders[i].available) |
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263 { |
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264 decoders[i].funcs->quit(); |
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265 decoders[i].available = 0; |
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266 } /* if */ |
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267 } /* for */ |
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268 |
| 4 | 269 if (available_decoders != NULL) |
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270 free((void *) available_decoders); |
| 4 | 271 available_decoders = NULL; |
| 272 | |
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273 /* clean up error state for each thread... */ |
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274 SDL_LockMutex(errorlist_mutex); |
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275 for (err = error_msgs; err != NULL; err = nexterr) |
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276 { |
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277 nexterr = err->next; |
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278 free(err); |
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279 } /* for */ |
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280 error_msgs = NULL; |
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281 SDL_UnlockMutex(errorlist_mutex); |
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282 SDL_DestroyMutex(errorlist_mutex); |
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283 errorlist_mutex = NULL; |
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284 |
| 4 | 285 return(1); |
| 286 } /* Sound_Quit */ | |
| 287 | |
| 288 | |
| 289 const Sound_DecoderInfo **Sound_AvailableDecoders(void) | |
| 290 { | |
| 291 return(available_decoders); /* READ. ONLY. */ | |
| 292 } /* Sound_AvailableDecoders */ | |
| 293 | |
| 294 | |
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295 static ErrMsg *findErrorForCurrentThread(void) |
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296 { |
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297 ErrMsg *i; |
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298 Uint32 tid; |
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299 |
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300 if (error_msgs != NULL) |
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301 { |
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302 tid = SDL_ThreadID(); |
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303 |
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304 SDL_LockMutex(errorlist_mutex); |
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305 for (i = error_msgs; i != NULL; i = i->next) |
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306 { |
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307 if (i->tid == tid) |
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308 { |
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309 SDL_UnlockMutex(errorlist_mutex); |
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310 return(i); |
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311 } /* if */ |
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312 } /* for */ |
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313 SDL_UnlockMutex(errorlist_mutex); |
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314 } /* if */ |
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315 |
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316 return(NULL); /* no error available. */ |
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317 } /* findErrorForCurrentThread */ |
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318 |
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319 |
| 4 | 320 const char *Sound_GetError(void) |
| 321 { | |
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322 const char *retval = NULL; |
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226
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323 ErrMsg *err; |
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324 |
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325 if (!initialized) |
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326 return(ERR_NOT_INITIALIZED); |
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327 |
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328 err = findErrorForCurrentThread(); |
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329 if ((err != NULL) && (err->error_available)) |
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330 { |
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331 retval = err->error_string; |
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332 err->error_available = 0; |
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333 } /* if */ |
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334 |
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335 return(retval); |
| 4 | 336 } /* Sound_GetError */ |
| 337 | |
| 338 | |
| 339 void Sound_ClearError(void) | |
| 340 { | |
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341 ErrMsg *err; |
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342 |
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343 if (!initialized) |
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344 return; |
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345 |
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346 err = findErrorForCurrentThread(); |
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347 if (err != NULL) |
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348 err->error_available = 0; |
| 4 | 349 } /* Sound_ClearError */ |
| 350 | |
| 351 | |
| 352 /* | |
| 353 * This is declared in the internal header. | |
| 354 */ | |
|
306
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355 void __Sound_SetError(const char *str) |
| 4 | 356 { |
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357 ErrMsg *err; |
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358 |
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359 if (str == NULL) |
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360 return; |
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361 |
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362 SNDDBG(("Sound_SetError(\"%s\");%s\n", str, |
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363 (initialized) ? "" : " [NOT INITIALIZED!]")); |
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364 |
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365 if (!initialized) |
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366 return; |
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367 |
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368 err = findErrorForCurrentThread(); |
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369 if (err == NULL) |
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370 { |
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371 err = (ErrMsg *) malloc(sizeof (ErrMsg)); |
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372 if (err == NULL) |
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373 return; /* uhh...? */ |
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374 |
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375 memset((void *) err, '\0', sizeof (ErrMsg)); |
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376 err->tid = SDL_ThreadID(); |
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377 |
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378 SDL_LockMutex(errorlist_mutex); |
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379 err->next = error_msgs; |
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380 error_msgs = err; |
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381 SDL_UnlockMutex(errorlist_mutex); |
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382 } /* if */ |
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383 |
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384 err->error_available = 1; |
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385 strncpy(err->error_string, str, sizeof (err->error_string)); |
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386 err->error_string[sizeof (err->error_string) - 1] = '\0'; |
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387 } /* __Sound_SetError */ |
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388 |
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389 |
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390 Uint32 __Sound_convertMsToBytePos(Sound_AudioInfo *info, Uint32 ms) |
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391 { |
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392 /* "frames" == "sample frames" */ |
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393 float frames_per_ms = ((float) info->rate) / 1000.0; |
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394 Uint32 frame_offset = (Uint32) (frames_per_ms * ((float) ms)); |
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395 Uint32 frame_size = (Uint32) ((info->format & 0xFF) / 8) * info->channels; |
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396 return(frame_offset * frame_size); |
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397 } /* __Sound_convertMsToBytePos */ |
| 4 | 398 |
| 399 | |
| 400 /* | |
| 401 * -ansi and -pedantic flags prevent use of strcasecmp() on Linux, and | |
| 402 * I honestly don't want to mess around with figuring out if a given | |
| 403 * platform has "strcasecmp", "stricmp", or | |
| 404 * "compare_two_damned_strings_case_insensitive", which I hear is in the | |
| 405 * next release of Carbon. :) This is exported so decoders may use it if | |
| 406 * they like. | |
| 407 */ | |
| 408 int __Sound_strcasecmp(const char *x, const char *y) | |
| 409 { | |
| 410 int ux, uy; | |
| 411 | |
|
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412 if (x == y) /* same pointer? Both NULL? */ |
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413 return(0); |
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414 |
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415 if (x == NULL) |
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416 return(-1); |
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417 |
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418 if (y == NULL) |
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419 return(1); |
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420 |
| 4 | 421 do |
| 422 { | |
| 423 ux = toupper((int) *x); | |
| 424 uy = toupper((int) *y); | |
| 425 if (ux > uy) | |
| 426 return(1); | |
| 427 else if (ux < uy) | |
| 428 return(-1); | |
| 429 x++; | |
| 430 y++; | |
| 431 } while ((ux) && (uy)); | |
| 432 | |
| 433 return(0); | |
| 434 } /* __Sound_strcasecmp */ | |
| 435 | |
| 436 | |
| 437 /* | |
| 438 * Allocate a Sound_Sample, and fill in most of its fields. Those that need | |
| 439 * to be filled in later, by a decoder, will be initialized to zero. | |
| 440 */ | |
| 441 static Sound_Sample *alloc_sample(SDL_RWops *rw, Sound_AudioInfo *desired, | |
| 442 Uint32 bufferSize) | |
| 443 { | |
| 444 Sound_Sample *retval = malloc(sizeof (Sound_Sample)); | |
| 445 Sound_SampleInternal *internal = malloc(sizeof (Sound_SampleInternal)); | |
| 446 if ((retval == NULL) || (internal == NULL)) | |
| 447 { | |
| 448 Sound_SetError(ERR_OUT_OF_MEMORY); | |
| 449 if (retval) | |
| 450 free(retval); | |
| 451 if (internal) | |
| 452 free(internal); | |
| 453 | |
| 454 return(NULL); | |
| 455 } /* if */ | |
| 456 | |
| 457 memset(retval, '\0', sizeof (Sound_Sample)); | |
| 458 memset(internal, '\0', sizeof (Sound_SampleInternal)); | |
| 459 | |
| 460 assert(bufferSize > 0); | |
| 461 retval->buffer = malloc(bufferSize); /* pure ugly. */ | |
| 462 if (!retval->buffer) | |
| 463 { | |
| 464 Sound_SetError(ERR_OUT_OF_MEMORY); | |
| 465 free(internal); | |
| 466 free(retval); | |
| 467 return(NULL); | |
| 468 } /* if */ | |
| 469 memset(retval->buffer, '\0', bufferSize); | |
| 470 retval->buffer_size = bufferSize; | |
| 471 | |
| 472 if (desired != NULL) | |
| 473 memcpy(&retval->desired, desired, sizeof (Sound_AudioInfo)); | |
| 474 | |
| 475 internal->rw = rw; | |
| 476 retval->opaque = internal; | |
| 477 return(retval); | |
| 478 } /* alloc_sample */ | |
| 479 | |
| 480 | |
|
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481 #if (defined DEBUG_CHATTER) |
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482 static __inline__ const char *fmt_to_str(Uint16 fmt) |
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483 { |
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484 switch(fmt) |
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485 { |
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486 case AUDIO_U8: |
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487 return("U8"); |
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488 case AUDIO_S8: |
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489 return("S8"); |
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490 case AUDIO_U16LSB: |
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491 return("U16LSB"); |
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492 case AUDIO_S16LSB: |
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493 return("S16LSB"); |
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494 case AUDIO_U16MSB: |
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495 return("U16MSB"); |
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496 case AUDIO_S16MSB: |
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497 return("S16MSB"); |
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498 } /* switch */ |
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499 |
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500 return("Unknown"); |
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501 } /* fmt_to_str */ |
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502 #endif |
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503 |
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504 |
| 4 | 505 /* |
| 506 * The bulk of the Sound_NewSample() work is done here... | |
| 507 * Ask the specified decoder to handle the data in (rw), and if | |
| 508 * so, construct the Sound_Sample. Otherwise, try to wind (rw)'s stream | |
| 509 * back to where it was, and return false. | |
| 510 * | |
| 511 * !!! FIXME: This is big, ugly, nasty, and smelly. | |
| 512 */ | |
| 513 static int init_sample(const Sound_DecoderFunctions *funcs, | |
| 514 Sound_Sample *sample, const char *ext, | |
| 515 Sound_AudioInfo *_desired) | |
| 516 { | |
| 517 Sound_SampleInternal *internal = (Sound_SampleInternal *) sample->opaque; | |
|
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518 Sound_AudioInfo desired; |
| 4 | 519 int pos = SDL_RWtell(internal->rw); /* !!! FIXME: Int? Really? */ |
| 520 | |
| 521 /* fill in the funcs for this decoder... */ | |
| 522 sample->decoder = &funcs->info; | |
| 523 internal->funcs = funcs; | |
| 524 if (!funcs->open(sample, ext)) | |
| 525 { | |
| 526 SDL_RWseek(internal->rw, pos, SEEK_SET); /* set for next try... */ | |
| 527 return(0); | |
| 528 } /* if */ | |
| 529 | |
| 530 /* success; we've got a decoder! */ | |
| 531 | |
| 532 /* Now we need to set up the conversion buffer... */ | |
| 533 | |
| 534 memcpy(&desired, (_desired != NULL) ? _desired : &sample->actual, | |
| 535 sizeof (Sound_AudioInfo)); | |
| 536 | |
|
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537 if (desired.format == 0) |
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538 desired.format = sample->actual.format; |
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539 if (desired.channels == 0) |
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540 desired.channels = sample->actual.channels; |
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541 if (desired.rate == 0) |
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542 desired.rate = sample->actual.rate; |
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543 |
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544 if (Sound_BuildAudioCVT(&internal->sdlcvt, |
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545 sample->actual.format, |
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546 sample->actual.channels, |
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547 sample->actual.rate, |
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548 desired.format, |
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549 desired.channels, |
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550 desired.rate) == -1) |
| 4 | 551 { |
| 552 Sound_SetError(SDL_GetError()); | |
| 553 funcs->close(sample); | |
| 554 SDL_RWseek(internal->rw, pos, SEEK_SET); /* set for next try... */ | |
| 555 return(0); | |
| 556 } /* if */ | |
| 557 | |
| 558 if (internal->sdlcvt.len_mult > 1) | |
| 559 { | |
| 560 void *rc = realloc(sample->buffer, | |
|
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561 sample->buffer_size * internal->sdlcvt.len_mult); |
| 4 | 562 if (rc == NULL) |
| 563 { | |
| 564 funcs->close(sample); | |
| 565 SDL_RWseek(internal->rw, pos, SEEK_SET); /* set for next try... */ | |
| 566 return(0); | |
| 567 } /* if */ | |
| 568 | |
| 569 sample->buffer = rc; | |
| 570 } /* if */ | |
| 571 | |
| 572 /* these pointers are all one and the same. */ | |
| 573 memcpy(&sample->desired, &desired, sizeof (Sound_AudioInfo)); | |
| 574 internal->sdlcvt.buf = internal->buffer = sample->buffer; | |
| 575 internal->buffer_size = sample->buffer_size / internal->sdlcvt.len_mult; | |
| 576 internal->sdlcvt.len = internal->buffer_size; | |
| 577 | |
|
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578 /* Prepend our new Sound_Sample to the sample_list... */ |
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579 SDL_LockMutex(samplelist_mutex); |
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580 internal->next = sample_list; |
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581 if (sample_list != NULL) |
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582 ((Sound_SampleInternal *) sample_list->opaque)->prev = sample; |
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583 sample_list = sample; |
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584 SDL_UnlockMutex(samplelist_mutex); |
| 4 | 585 |
|
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586 SNDDBG(("New sample DESIRED format: %s format, %d rate, %d channels.\n", |
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587 fmt_to_str(sample->desired.format), |
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588 sample->desired.rate, |
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589 sample->desired.channels)); |
|
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590 |
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591 SNDDBG(("New sample ACTUAL format: %s format, %d rate, %d channels.\n", |
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592 fmt_to_str(sample->actual.format), |
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593 sample->actual.rate, |
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594 sample->actual.channels)); |
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595 |
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596 SNDDBG(("On-the-fly conversion: %s.\n", |
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597 internal->sdlcvt.needed ? "ENABLED" : "DISABLED")); |
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598 |
| 4 | 599 return(1); |
| 600 } /* init_sample */ | |
| 601 | |
| 602 | |
| 603 Sound_Sample *Sound_NewSample(SDL_RWops *rw, const char *ext, | |
| 604 Sound_AudioInfo *desired, Uint32 bSize) | |
| 605 { | |
| 606 Sound_Sample *retval; | |
|
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607 decoder_element *decoder; |
| 4 | 608 |
| 609 /* sanity checks. */ | |
| 610 BAIL_IF_MACRO(!initialized, ERR_NOT_INITIALIZED, NULL); | |
| 611 BAIL_IF_MACRO(rw == NULL, ERR_INVALID_ARGUMENT, NULL); | |
| 612 | |
| 613 retval = alloc_sample(rw, desired, bSize); | |
| 614 if (!retval) | |
| 615 return(NULL); /* alloc_sample() sets error message... */ | |
| 616 | |
| 617 if (ext != NULL) | |
| 618 { | |
|
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619 for (decoder = &decoders[0]; decoder->funcs != NULL; decoder++) |
| 4 | 620 { |
|
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621 if (decoder->available) |
| 4 | 622 { |
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623 const char **decoderExt = decoder->funcs->info.extensions; |
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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 if (init_sample(decoder->funcs, retval, ext, desired)) |
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629 return(retval); |
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630 break; /* done with this decoder either way. */ |
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631 } /* if */ |
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632 decoderExt++; |
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633 } /* while */ |
| 4 | 634 } /* if */ |
| 635 } /* for */ | |
| 636 } /* if */ | |
| 637 | |
| 638 /* no direct extension match? Try everything we've got... */ | |
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639 for (decoder = &decoders[0]; decoder->funcs != NULL; decoder++) |
| 4 | 640 { |
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641 if (decoder->available) |
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642 { |
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643 int should_try = 1; |
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644 const char **decoderExt = decoder->funcs->info.extensions; |
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645 |
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646 /* skip if we would have tried decoder above... */ |
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647 while (*decoderExt) |
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648 { |
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649 if (__Sound_strcasecmp(*decoderExt, ext) == 0) |
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650 { |
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651 should_try = 0; |
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652 break; |
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653 } /* if */ |
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654 decoderExt++; |
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655 } /* while */ |
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656 |
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657 if (should_try) |
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658 { |
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659 if (init_sample(decoder->funcs, retval, ext, desired)) |
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660 return(retval); |
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661 } /* if */ |
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662 } /* if */ |
| 4 | 663 } /* for */ |
| 664 | |
| 665 /* nothing could handle the sound data... */ | |
| 666 free(retval->opaque); | |
| 667 if (retval->buffer != NULL) | |
| 668 free(retval->buffer); | |
| 669 free(retval); | |
| 670 SDL_RWclose(rw); | |
| 671 Sound_SetError(ERR_UNSUPPORTED_FORMAT); | |
| 672 return(NULL); | |
| 673 } /* Sound_NewSample */ | |
| 674 | |
| 675 | |
| 676 Sound_Sample *Sound_NewSampleFromFile(const char *filename, | |
| 677 Sound_AudioInfo *desired, | |
| 678 Uint32 bufferSize) | |
| 679 { | |
| 680 const char *ext; | |
| 681 SDL_RWops *rw; | |
| 682 | |
| 683 BAIL_IF_MACRO(!initialized, ERR_NOT_INITIALIZED, NULL); | |
| 684 BAIL_IF_MACRO(filename == NULL, ERR_INVALID_ARGUMENT, NULL); | |
| 685 | |
| 686 ext = strrchr(filename, '.'); | |
| 687 rw = SDL_RWFromFile(filename, "rb"); | |
| 688 BAIL_IF_MACRO(rw == NULL, SDL_GetError(), NULL); | |
| 689 | |
| 690 if (ext != NULL) | |
| 691 ext++; | |
| 692 | |
| 693 return(Sound_NewSample(rw, ext, desired, bufferSize)); | |
| 694 } /* Sound_NewSampleFromFile */ | |
| 695 | |
| 696 | |
| 697 void Sound_FreeSample(Sound_Sample *sample) | |
| 698 { | |
| 699 Sound_SampleInternal *internal; | |
| 700 | |
| 701 if (!initialized) | |
| 702 { | |
| 703 Sound_SetError(ERR_NOT_INITIALIZED); | |
| 704 return; | |
| 705 } /* if */ | |
| 706 | |
| 707 if (sample == NULL) | |
| 708 { | |
| 709 Sound_SetError(ERR_INVALID_ARGUMENT); | |
| 710 return; | |
| 711 } /* if */ | |
| 712 | |
| 713 internal = (Sound_SampleInternal *) sample->opaque; | |
| 714 | |
|
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715 SDL_LockMutex(samplelist_mutex); |
| 4 | 716 |
|
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717 /* update the sample_list... */ |
| 4 | 718 if (internal->prev != NULL) |
| 719 { | |
| 720 Sound_SampleInternal *prevInternal; | |
| 721 prevInternal = (Sound_SampleInternal *) internal->prev->opaque; | |
| 722 prevInternal->next = internal->next; | |
| 723 } /* if */ | |
| 724 else | |
| 725 { | |
|
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726 assert(sample_list == sample); |
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727 sample_list = internal->next; |
| 4 | 728 } /* else */ |
| 729 | |
| 730 if (internal->next != NULL) | |
| 731 { | |
| 732 Sound_SampleInternal *nextInternal; | |
| 733 nextInternal = (Sound_SampleInternal *) internal->next->opaque; | |
| 734 nextInternal->prev = internal->prev; | |
| 735 } /* if */ | |
| 736 | |
|
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737 SDL_UnlockMutex(samplelist_mutex); |
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738 |
| 4 | 739 /* nuke it... */ |
|
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740 internal->funcs->close(sample); |
|
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741 |
| 4 | 742 if (internal->rw != NULL) /* this condition is a "just in case" thing. */ |
| 743 SDL_RWclose(internal->rw); | |
|
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744 |
|
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745 if ((internal->buffer != NULL) && (internal->buffer != sample->buffer)) |
| 4 | 746 free(internal->buffer); |
|
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747 |
| 4 | 748 free(internal); |
|
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749 |
| 4 | 750 if (sample->buffer != NULL) |
| 751 free(sample->buffer); | |
|
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752 |
| 4 | 753 free(sample); |
| 754 } /* Sound_FreeSample */ | |
| 755 | |
| 756 | |
| 757 int Sound_SetBufferSize(Sound_Sample *sample, Uint32 newSize) | |
| 758 { | |
| 759 void *newBuf = NULL; | |
| 760 Sound_SampleInternal *internal = NULL; | |
| 761 | |
| 762 BAIL_IF_MACRO(!initialized, ERR_NOT_INITIALIZED, 0); | |
| 763 BAIL_IF_MACRO(sample == NULL, ERR_INVALID_ARGUMENT, 0); | |
| 764 internal = ((Sound_SampleInternal *) sample->opaque); | |
| 765 newBuf = realloc(sample->buffer, newSize * internal->sdlcvt.len_mult); | |
| 766 BAIL_IF_MACRO(newBuf == NULL, ERR_OUT_OF_MEMORY, 0); | |
| 767 | |
| 768 internal->sdlcvt.buf = internal->buffer = sample->buffer = newBuf; | |
| 769 sample->buffer_size = newSize; | |
| 770 internal->buffer_size = newSize / internal->sdlcvt.len_mult; | |
| 771 internal->sdlcvt.len = internal->buffer_size; | |
| 772 | |
| 773 return(1); | |
| 774 } /* Sound_SetBufferSize */ | |
| 775 | |
| 776 | |
| 777 Uint32 Sound_Decode(Sound_Sample *sample) | |
| 778 { | |
| 779 Sound_SampleInternal *internal = NULL; | |
| 780 Uint32 retval = 0; | |
| 781 | |
| 782 /* a boatload of sanity checks... */ | |
| 783 BAIL_IF_MACRO(!initialized, ERR_NOT_INITIALIZED, 0); | |
| 784 BAIL_IF_MACRO(sample == NULL, ERR_INVALID_ARGUMENT, 0); | |
| 785 BAIL_IF_MACRO(sample->flags & SOUND_SAMPLEFLAG_ERROR, ERR_PREV_ERROR, 0); | |
| 786 BAIL_IF_MACRO(sample->flags & SOUND_SAMPLEFLAG_EOF, ERR_PREV_EOF, 0); | |
| 787 | |
| 788 internal = (Sound_SampleInternal *) sample->opaque; | |
| 789 | |
| 790 assert(sample->buffer != NULL); | |
| 791 assert(sample->buffer_size > 0); | |
| 792 assert(internal->buffer != NULL); | |
| 793 assert(internal->buffer_size > 0); | |
| 794 | |
| 795 /* reset EAGAIN. Decoder can flip it back on if it needs to. */ | |
|
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796 sample->flags &= ~SOUND_SAMPLEFLAG_EAGAIN; |
| 4 | 797 retval = internal->funcs->read(sample); |
|
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798 |
|
163
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799 if (retval > 0 && internal->sdlcvt.needed) |
| 4 | 800 { |
| 801 internal->sdlcvt.len = retval; | |
|
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802 Sound_ConvertAudio(&internal->sdlcvt); |
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803 retval = internal->sdlcvt.len_cvt; |
| 4 | 804 } /* if */ |
| 805 | |
| 806 return(retval); | |
| 807 } /* Sound_Decode */ | |
| 808 | |
| 809 | |
| 810 Uint32 Sound_DecodeAll(Sound_Sample *sample) | |
| 811 { | |
| 812 Sound_SampleInternal *internal = NULL; | |
| 813 void *buf = NULL; | |
| 814 Uint32 newBufSize = 0; | |
| 815 | |
| 816 BAIL_IF_MACRO(!initialized, ERR_NOT_INITIALIZED, 0); | |
|
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817 BAIL_IF_MACRO(sample->flags & SOUND_SAMPLEFLAG_EOF, ERR_PREV_EOF, 0); |
|
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818 BAIL_IF_MACRO(sample->flags & SOUND_SAMPLEFLAG_ERROR, ERR_PREV_ERROR, 0); |
| 4 | 819 |
| 820 internal = (Sound_SampleInternal *) sample->opaque; | |
| 821 | |
| 822 while ( ((sample->flags & SOUND_SAMPLEFLAG_EOF) == 0) && | |
| 823 ((sample->flags & SOUND_SAMPLEFLAG_ERROR) == 0) ) | |
| 824 { | |
|
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825 Uint32 br = Sound_Decode(sample); |
|
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826 void *ptr = realloc(buf, newBufSize + br); |
| 4 | 827 if (ptr == NULL) |
| 828 { | |
| 829 sample->flags |= SOUND_SAMPLEFLAG_ERROR; | |
| 830 Sound_SetError(ERR_OUT_OF_MEMORY); | |
| 831 } /* if */ | |
| 832 else | |
| 833 { | |
|
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834 buf = ptr; |
| 4 | 835 memcpy( ((char *) buf) + newBufSize, sample->buffer, br ); |
| 836 newBufSize += br; | |
| 837 } /* else */ | |
| 838 } /* while */ | |
| 839 | |
|
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840 if (buf == NULL) /* ...in case first call to realloc() fails... */ |
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841 return(sample->buffer_size); |
|
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842 |
|
167
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843 if (internal->buffer != sample->buffer) |
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844 free(internal->buffer); |
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845 |
| 4 | 846 free(sample->buffer); |
|
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847 |
|
82acaa7107c2
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848 internal->sdlcvt.buf = internal->buffer = sample->buffer = buf; |
| 4 | 849 sample->buffer_size = newBufSize; |
| 850 internal->buffer_size = newBufSize / internal->sdlcvt.len_mult; | |
|
167
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851 internal->sdlcvt.len = internal->buffer_size; |
| 4 | 852 |
| 853 return(newBufSize); | |
| 854 } /* Sound_DecodeAll */ | |
| 855 | |
|
223
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856 |
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857 int Sound_Rewind(Sound_Sample *sample) |
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858 { |
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859 Sound_SampleInternal *internal; |
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860 BAIL_IF_MACRO(!initialized, ERR_NOT_INITIALIZED, 0); |
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861 |
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862 internal = (Sound_SampleInternal *) sample->opaque; |
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863 if (!internal->funcs->rewind(sample)) |
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864 { |
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865 sample->flags |= SOUND_SAMPLEFLAG_ERROR; |
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866 return(0); |
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867 } /* if */ |
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868 |
|
311
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869 sample->flags &= ~SOUND_SAMPLEFLAG_EAGAIN; |
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870 sample->flags &= ~SOUND_SAMPLEFLAG_ERROR; |
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871 sample->flags &= ~SOUND_SAMPLEFLAG_EOF; |
|
306
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Added framework for Sound_Seek() support.
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872 |
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873 return(1); |
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874 } /* Sound_Rewind */ |
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875 |
|
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876 |
|
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877 int Sound_Seek(Sound_Sample *sample, Uint32 ms) |
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878 { |
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879 Sound_SampleInternal *internal; |
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880 |
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881 BAIL_IF_MACRO(!initialized, ERR_NOT_INITIALIZED, 0); |
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882 if (!(sample->flags & SOUND_SAMPLEFLAG_CANSEEK)) |
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883 BAIL_MACRO(ERR_CANNOT_SEEK, 0); |
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884 |
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885 internal = (Sound_SampleInternal *) sample->opaque; |
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886 BAIL_IF_MACRO(!internal->funcs->seek(sample, ms), NULL, 0); |
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887 |
|
311
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888 sample->flags &= ~SOUND_SAMPLEFLAG_EAGAIN; |
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889 sample->flags &= ~SOUND_SAMPLEFLAG_ERROR; |
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890 sample->flags &= ~SOUND_SAMPLEFLAG_EOF; |
|
306
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891 |
|
223
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892 return(1); |
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893 } /* Sound_Rewind */ |
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894 |
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895 |
| 4 | 896 /* end of SDL_sound.c ... */ |
| 897 |