Mercurial > SDL_sound_CoreAudio
annotate SDL_sound.c @ 310:9e21cb0d3ae7
Seek support added.
| author | Ryan C. Gordon <icculus@icculus.org> |
|---|---|
| date | Wed, 24 Apr 2002 20:01:20 +0000 |
| parents | c97be6e1bd27 |
| children | d62c05322a3e |
| 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 */ | |
|
306
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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'; |
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381 } /* __Sound_SetError */ |
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382 |
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383 |
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384 Uint32 __Sound_convertMsToBytePos(Sound_AudioInfo *info, Uint32 ms) |
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385 { |
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386 /* "frames" == "sample frames" */ |
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387 float frames_per_ms = ((float) info->rate) / 1000.0; |
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388 Uint32 frame_offset = (Uint32) (frames_per_ms * ((float) ms)); |
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389 Uint32 frame_size = (Uint32) ((info->format & 0xFF) / 8) * info->channels; |
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390 return(frame_offset * frame_size); |
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391 } /* __Sound_convertMsToBytePos */ |
| 4 | 392 |
| 393 | |
| 394 /* | |
| 395 * -ansi and -pedantic flags prevent use of strcasecmp() on Linux, and | |
| 396 * I honestly don't want to mess around with figuring out if a given | |
| 397 * platform has "strcasecmp", "stricmp", or | |
| 398 * "compare_two_damned_strings_case_insensitive", which I hear is in the | |
| 399 * next release of Carbon. :) This is exported so decoders may use it if | |
| 400 * they like. | |
| 401 */ | |
| 402 int __Sound_strcasecmp(const char *x, const char *y) | |
| 403 { | |
| 404 int ux, uy; | |
| 405 | |
|
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406 if (x == y) /* same pointer? Both NULL? */ |
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407 return(0); |
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408 |
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409 if (x == NULL) |
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410 return(-1); |
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411 |
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412 if (y == NULL) |
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413 return(1); |
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414 |
| 4 | 415 do |
| 416 { | |
| 417 ux = toupper((int) *x); | |
| 418 uy = toupper((int) *y); | |
| 419 if (ux > uy) | |
| 420 return(1); | |
| 421 else if (ux < uy) | |
| 422 return(-1); | |
| 423 x++; | |
| 424 y++; | |
| 425 } while ((ux) && (uy)); | |
| 426 | |
| 427 return(0); | |
| 428 } /* __Sound_strcasecmp */ | |
| 429 | |
| 430 | |
| 431 /* | |
| 432 * Allocate a Sound_Sample, and fill in most of its fields. Those that need | |
| 433 * to be filled in later, by a decoder, will be initialized to zero. | |
| 434 */ | |
| 435 static Sound_Sample *alloc_sample(SDL_RWops *rw, Sound_AudioInfo *desired, | |
| 436 Uint32 bufferSize) | |
| 437 { | |
| 438 Sound_Sample *retval = malloc(sizeof (Sound_Sample)); | |
| 439 Sound_SampleInternal *internal = malloc(sizeof (Sound_SampleInternal)); | |
| 440 if ((retval == NULL) || (internal == NULL)) | |
| 441 { | |
| 442 Sound_SetError(ERR_OUT_OF_MEMORY); | |
| 443 if (retval) | |
| 444 free(retval); | |
| 445 if (internal) | |
| 446 free(internal); | |
| 447 | |
| 448 return(NULL); | |
| 449 } /* if */ | |
| 450 | |
| 451 memset(retval, '\0', sizeof (Sound_Sample)); | |
| 452 memset(internal, '\0', sizeof (Sound_SampleInternal)); | |
| 453 | |
| 454 assert(bufferSize > 0); | |
| 455 retval->buffer = malloc(bufferSize); /* pure ugly. */ | |
| 456 if (!retval->buffer) | |
| 457 { | |
| 458 Sound_SetError(ERR_OUT_OF_MEMORY); | |
| 459 free(internal); | |
| 460 free(retval); | |
| 461 return(NULL); | |
| 462 } /* if */ | |
| 463 memset(retval->buffer, '\0', bufferSize); | |
| 464 retval->buffer_size = bufferSize; | |
| 465 | |
| 466 if (desired != NULL) | |
| 467 memcpy(&retval->desired, desired, sizeof (Sound_AudioInfo)); | |
| 468 | |
| 469 internal->rw = rw; | |
| 470 retval->opaque = internal; | |
| 471 return(retval); | |
| 472 } /* alloc_sample */ | |
| 473 | |
| 474 | |
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475 #if (defined DEBUG_CHATTER) |
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476 static __inline__ const char *fmt_to_str(Uint16 fmt) |
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477 { |
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478 switch(fmt) |
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479 { |
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480 case AUDIO_U8: |
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481 return("U8"); |
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482 case AUDIO_S8: |
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483 return("S8"); |
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484 case AUDIO_U16LSB: |
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485 return("U16LSB"); |
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486 case AUDIO_S16LSB: |
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487 return("S16LSB"); |
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488 case AUDIO_U16MSB: |
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489 return("U16MSB"); |
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490 case AUDIO_S16MSB: |
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491 return("S16MSB"); |
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492 } /* switch */ |
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493 |
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494 return("Unknown"); |
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495 } /* fmt_to_str */ |
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496 #endif |
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497 |
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498 |
| 4 | 499 /* |
| 500 * The bulk of the Sound_NewSample() work is done here... | |
| 501 * Ask the specified decoder to handle the data in (rw), and if | |
| 502 * so, construct the Sound_Sample. Otherwise, try to wind (rw)'s stream | |
| 503 * back to where it was, and return false. | |
| 504 * | |
| 505 * !!! FIXME: This is big, ugly, nasty, and smelly. | |
| 506 */ | |
| 507 static int init_sample(const Sound_DecoderFunctions *funcs, | |
| 508 Sound_Sample *sample, const char *ext, | |
| 509 Sound_AudioInfo *_desired) | |
| 510 { | |
| 511 Sound_SampleInternal *internal = (Sound_SampleInternal *) sample->opaque; | |
|
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512 Sound_AudioInfo desired; |
| 4 | 513 int pos = SDL_RWtell(internal->rw); /* !!! FIXME: Int? Really? */ |
| 514 | |
| 515 /* fill in the funcs for this decoder... */ | |
| 516 sample->decoder = &funcs->info; | |
| 517 internal->funcs = funcs; | |
| 518 if (!funcs->open(sample, ext)) | |
| 519 { | |
| 520 SDL_RWseek(internal->rw, pos, SEEK_SET); /* set for next try... */ | |
| 521 return(0); | |
| 522 } /* if */ | |
| 523 | |
| 524 /* success; we've got a decoder! */ | |
| 525 | |
| 526 /* Now we need to set up the conversion buffer... */ | |
| 527 | |
| 528 memcpy(&desired, (_desired != NULL) ? _desired : &sample->actual, | |
| 529 sizeof (Sound_AudioInfo)); | |
| 530 | |
|
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531 if (Sound_BuildAudioCVT(&internal->sdlcvt, |
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532 sample->actual.format, |
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533 sample->actual.channels, |
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534 sample->actual.rate, |
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535 desired.format, |
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536 desired.channels, |
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537 desired.rate) == -1) |
| 4 | 538 { |
| 539 Sound_SetError(SDL_GetError()); | |
| 540 funcs->close(sample); | |
| 541 SDL_RWseek(internal->rw, pos, SEEK_SET); /* set for next try... */ | |
| 542 return(0); | |
| 543 } /* if */ | |
| 544 | |
| 545 if (internal->sdlcvt.len_mult > 1) | |
| 546 { | |
| 547 void *rc = realloc(sample->buffer, | |
|
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548 sample->buffer_size * internal->sdlcvt.len_mult); |
| 4 | 549 if (rc == NULL) |
| 550 { | |
| 551 funcs->close(sample); | |
| 552 SDL_RWseek(internal->rw, pos, SEEK_SET); /* set for next try... */ | |
| 553 return(0); | |
| 554 } /* if */ | |
| 555 | |
| 556 sample->buffer = rc; | |
| 557 } /* if */ | |
| 558 | |
| 559 /* these pointers are all one and the same. */ | |
| 560 memcpy(&sample->desired, &desired, sizeof (Sound_AudioInfo)); | |
| 561 internal->sdlcvt.buf = internal->buffer = sample->buffer; | |
| 562 internal->buffer_size = sample->buffer_size / internal->sdlcvt.len_mult; | |
| 563 internal->sdlcvt.len = internal->buffer_size; | |
| 564 | |
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565 /* Prepend our new Sound_Sample to the sample_list... */ |
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566 SDL_LockMutex(samplelist_mutex); |
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567 internal->next = sample_list; |
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568 if (sample_list != NULL) |
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569 ((Sound_SampleInternal *) sample_list->opaque)->prev = sample; |
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570 sample_list = sample; |
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571 SDL_UnlockMutex(samplelist_mutex); |
| 4 | 572 |
|
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573 SNDDBG(("New sample DESIRED format: %s format, %d rate, %d channels.\n", |
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574 fmt_to_str(sample->desired.format), |
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575 sample->desired.rate, |
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576 sample->desired.channels)); |
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577 |
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578 SNDDBG(("New sample ACTUAL format: %s format, %d rate, %d channels.\n", |
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579 fmt_to_str(sample->actual.format), |
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580 sample->actual.rate, |
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581 sample->actual.channels)); |
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582 |
|
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583 SNDDBG(("On-the-fly conversion: %s.\n", |
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584 internal->sdlcvt.needed ? "ENABLED" : "DISABLED")); |
|
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585 |
| 4 | 586 return(1); |
| 587 } /* init_sample */ | |
| 588 | |
| 589 | |
| 590 Sound_Sample *Sound_NewSample(SDL_RWops *rw, const char *ext, | |
| 591 Sound_AudioInfo *desired, Uint32 bSize) | |
| 592 { | |
| 593 Sound_Sample *retval; | |
|
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594 decoder_element *decoder; |
| 4 | 595 |
| 596 /* sanity checks. */ | |
| 597 BAIL_IF_MACRO(!initialized, ERR_NOT_INITIALIZED, NULL); | |
| 598 BAIL_IF_MACRO(rw == NULL, ERR_INVALID_ARGUMENT, NULL); | |
| 599 | |
| 600 retval = alloc_sample(rw, desired, bSize); | |
| 601 if (!retval) | |
| 602 return(NULL); /* alloc_sample() sets error message... */ | |
| 603 | |
| 604 if (ext != NULL) | |
| 605 { | |
|
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606 for (decoder = &decoders[0]; decoder->funcs != NULL; decoder++) |
| 4 | 607 { |
|
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608 if (decoder->available) |
| 4 | 609 { |
|
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610 const char **decoderExt = decoder->funcs->info.extensions; |
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611 while (*decoderExt) |
|
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612 { |
|
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613 if (__Sound_strcasecmp(*decoderExt, ext) == 0) |
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614 { |
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615 if (init_sample(decoder->funcs, retval, ext, desired)) |
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616 return(retval); |
|
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617 break; /* done with this decoder either way. */ |
|
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618 } /* if */ |
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619 decoderExt++; |
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620 } /* while */ |
| 4 | 621 } /* if */ |
| 622 } /* for */ | |
| 623 } /* if */ | |
| 624 | |
| 625 /* no direct extension match? Try everything we've got... */ | |
|
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626 for (decoder = &decoders[0]; decoder->funcs != NULL; decoder++) |
| 4 | 627 { |
|
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628 if (decoder->available) |
|
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629 { |
|
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630 int should_try = 1; |
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631 const char **decoderExt = decoder->funcs->info.extensions; |
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632 |
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633 /* skip if we would have tried decoder above... */ |
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634 while (*decoderExt) |
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635 { |
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636 if (__Sound_strcasecmp(*decoderExt, ext) == 0) |
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637 { |
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638 should_try = 0; |
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639 break; |
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640 } /* if */ |
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641 decoderExt++; |
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642 } /* while */ |
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643 |
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644 if (should_try) |
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645 { |
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646 if (init_sample(decoder->funcs, retval, ext, desired)) |
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647 return(retval); |
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648 } /* if */ |
|
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649 } /* if */ |
| 4 | 650 } /* for */ |
| 651 | |
| 652 /* nothing could handle the sound data... */ | |
| 653 free(retval->opaque); | |
| 654 if (retval->buffer != NULL) | |
| 655 free(retval->buffer); | |
| 656 free(retval); | |
| 657 SDL_RWclose(rw); | |
| 658 Sound_SetError(ERR_UNSUPPORTED_FORMAT); | |
| 659 return(NULL); | |
| 660 } /* Sound_NewSample */ | |
| 661 | |
| 662 | |
| 663 Sound_Sample *Sound_NewSampleFromFile(const char *filename, | |
| 664 Sound_AudioInfo *desired, | |
| 665 Uint32 bufferSize) | |
| 666 { | |
| 667 const char *ext; | |
| 668 SDL_RWops *rw; | |
| 669 | |
| 670 BAIL_IF_MACRO(!initialized, ERR_NOT_INITIALIZED, NULL); | |
| 671 BAIL_IF_MACRO(filename == NULL, ERR_INVALID_ARGUMENT, NULL); | |
| 672 | |
| 673 ext = strrchr(filename, '.'); | |
| 674 rw = SDL_RWFromFile(filename, "rb"); | |
| 675 BAIL_IF_MACRO(rw == NULL, SDL_GetError(), NULL); | |
| 676 | |
| 677 if (ext != NULL) | |
| 678 ext++; | |
| 679 | |
| 680 return(Sound_NewSample(rw, ext, desired, bufferSize)); | |
| 681 } /* Sound_NewSampleFromFile */ | |
| 682 | |
| 683 | |
| 684 void Sound_FreeSample(Sound_Sample *sample) | |
| 685 { | |
| 686 Sound_SampleInternal *internal; | |
| 687 | |
| 688 if (!initialized) | |
| 689 { | |
| 690 Sound_SetError(ERR_NOT_INITIALIZED); | |
| 691 return; | |
| 692 } /* if */ | |
| 693 | |
| 694 if (sample == NULL) | |
| 695 { | |
| 696 Sound_SetError(ERR_INVALID_ARGUMENT); | |
| 697 return; | |
| 698 } /* if */ | |
| 699 | |
| 700 internal = (Sound_SampleInternal *) sample->opaque; | |
| 701 | |
|
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702 SDL_LockMutex(samplelist_mutex); |
| 4 | 703 |
|
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704 /* update the sample_list... */ |
| 4 | 705 if (internal->prev != NULL) |
| 706 { | |
| 707 Sound_SampleInternal *prevInternal; | |
| 708 prevInternal = (Sound_SampleInternal *) internal->prev->opaque; | |
| 709 prevInternal->next = internal->next; | |
| 710 } /* if */ | |
| 711 else | |
| 712 { | |
|
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713 assert(sample_list == sample); |
|
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714 sample_list = internal->next; |
| 4 | 715 } /* else */ |
| 716 | |
| 717 if (internal->next != NULL) | |
| 718 { | |
| 719 Sound_SampleInternal *nextInternal; | |
| 720 nextInternal = (Sound_SampleInternal *) internal->next->opaque; | |
| 721 nextInternal->prev = internal->prev; | |
| 722 } /* if */ | |
| 723 | |
|
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724 SDL_UnlockMutex(samplelist_mutex); |
|
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725 |
| 4 | 726 /* nuke it... */ |
|
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727 internal->funcs->close(sample); |
|
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728 |
| 4 | 729 if (internal->rw != NULL) /* this condition is a "just in case" thing. */ |
| 730 SDL_RWclose(internal->rw); | |
|
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Fixed Sound_DecodeAll(), and made Sound_FreeSample() a little more robust.
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731 |
|
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732 if ((internal->buffer != NULL) && (internal->buffer != sample->buffer)) |
| 4 | 733 free(internal->buffer); |
|
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734 |
| 4 | 735 free(internal); |
|
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736 |
| 4 | 737 if (sample->buffer != NULL) |
| 738 free(sample->buffer); | |
|
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739 |
| 4 | 740 free(sample); |
| 741 } /* Sound_FreeSample */ | |
| 742 | |
| 743 | |
| 744 int Sound_SetBufferSize(Sound_Sample *sample, Uint32 newSize) | |
| 745 { | |
| 746 void *newBuf = NULL; | |
| 747 Sound_SampleInternal *internal = NULL; | |
| 748 | |
| 749 BAIL_IF_MACRO(!initialized, ERR_NOT_INITIALIZED, 0); | |
| 750 BAIL_IF_MACRO(sample == NULL, ERR_INVALID_ARGUMENT, 0); | |
| 751 internal = ((Sound_SampleInternal *) sample->opaque); | |
| 752 newBuf = realloc(sample->buffer, newSize * internal->sdlcvt.len_mult); | |
| 753 BAIL_IF_MACRO(newBuf == NULL, ERR_OUT_OF_MEMORY, 0); | |
| 754 | |
| 755 internal->sdlcvt.buf = internal->buffer = sample->buffer = newBuf; | |
| 756 sample->buffer_size = newSize; | |
| 757 internal->buffer_size = newSize / internal->sdlcvt.len_mult; | |
| 758 internal->sdlcvt.len = internal->buffer_size; | |
| 759 | |
| 760 return(1); | |
| 761 } /* Sound_SetBufferSize */ | |
| 762 | |
| 763 | |
| 764 Uint32 Sound_Decode(Sound_Sample *sample) | |
| 765 { | |
| 766 Sound_SampleInternal *internal = NULL; | |
| 767 Uint32 retval = 0; | |
| 768 | |
| 769 /* a boatload of sanity checks... */ | |
| 770 BAIL_IF_MACRO(!initialized, ERR_NOT_INITIALIZED, 0); | |
| 771 BAIL_IF_MACRO(sample == NULL, ERR_INVALID_ARGUMENT, 0); | |
| 772 BAIL_IF_MACRO(sample->flags & SOUND_SAMPLEFLAG_ERROR, ERR_PREV_ERROR, 0); | |
| 773 BAIL_IF_MACRO(sample->flags & SOUND_SAMPLEFLAG_EOF, ERR_PREV_EOF, 0); | |
| 774 | |
| 775 internal = (Sound_SampleInternal *) sample->opaque; | |
| 776 | |
| 777 assert(sample->buffer != NULL); | |
| 778 assert(sample->buffer_size > 0); | |
| 779 assert(internal->buffer != NULL); | |
| 780 assert(internal->buffer_size > 0); | |
| 781 | |
| 782 /* reset EAGAIN. Decoder can flip it back on if it needs to. */ | |
| 783 sample->flags &= !SOUND_SAMPLEFLAG_EAGAIN; | |
| 784 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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785 |
|
163
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Moved MIDI decoder to end of array. Fixed Sound_SetError() so that it
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786 if (retval > 0 && internal->sdlcvt.needed) |
| 4 | 787 { |
| 788 internal->sdlcvt.len = retval; | |
|
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Start of audio converter work.
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789 Sound_ConvertAudio(&internal->sdlcvt); |
|
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790 retval = internal->sdlcvt.len_cvt; |
| 4 | 791 } /* if */ |
| 792 | |
| 793 return(retval); | |
| 794 } /* Sound_Decode */ | |
| 795 | |
| 796 | |
| 797 Uint32 Sound_DecodeAll(Sound_Sample *sample) | |
| 798 { | |
| 799 Sound_SampleInternal *internal = NULL; | |
| 800 void *buf = NULL; | |
| 801 Uint32 newBufSize = 0; | |
| 802 | |
| 803 BAIL_IF_MACRO(!initialized, ERR_NOT_INITIALIZED, 0); | |
|
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804 BAIL_IF_MACRO(sample->flags & SOUND_SAMPLEFLAG_EOF, ERR_PREV_EOF, 0); |
|
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805 BAIL_IF_MACRO(sample->flags & SOUND_SAMPLEFLAG_ERROR, ERR_PREV_ERROR, 0); |
| 4 | 806 |
| 807 internal = (Sound_SampleInternal *) sample->opaque; | |
| 808 | |
| 809 while ( ((sample->flags & SOUND_SAMPLEFLAG_EOF) == 0) && | |
| 810 ((sample->flags & SOUND_SAMPLEFLAG_ERROR) == 0) ) | |
| 811 { | |
|
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812 Uint32 br = Sound_Decode(sample); |
|
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813 void *ptr = realloc(buf, newBufSize + br); |
| 4 | 814 if (ptr == NULL) |
| 815 { | |
| 816 sample->flags |= SOUND_SAMPLEFLAG_ERROR; | |
| 817 Sound_SetError(ERR_OUT_OF_MEMORY); | |
| 818 } /* if */ | |
| 819 else | |
| 820 { | |
|
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821 buf = ptr; |
| 4 | 822 memcpy( ((char *) buf) + newBufSize, sample->buffer, br ); |
| 823 newBufSize += br; | |
| 824 } /* else */ | |
| 825 } /* while */ | |
| 826 | |
|
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827 if (buf == NULL) /* ...in case first call to realloc() fails... */ |
|
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828 return(sample->buffer_size); |
|
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829 |
|
167
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830 if (internal->buffer != sample->buffer) |
|
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831 free(internal->buffer); |
|
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832 |
| 4 | 833 free(sample->buffer); |
|
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834 |
|
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835 internal->sdlcvt.buf = internal->buffer = sample->buffer = buf; |
| 4 | 836 sample->buffer_size = newBufSize; |
| 837 internal->buffer_size = newBufSize / internal->sdlcvt.len_mult; | |
|
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838 internal->sdlcvt.len = internal->buffer_size; |
| 4 | 839 |
| 840 return(newBufSize); | |
| 841 } /* Sound_DecodeAll */ | |
| 842 | |
|
223
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Sound_Rewind() support code.
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843 |
|
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Sound_Rewind() support code.
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844 int Sound_Rewind(Sound_Sample *sample) |
|
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845 { |
|
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Sound_Rewind() support code.
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846 Sound_SampleInternal *internal; |
|
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847 BAIL_IF_MACRO(!initialized, ERR_NOT_INITIALIZED, 0); |
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848 |
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849 internal = (Sound_SampleInternal *) sample->opaque; |
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850 if (!internal->funcs->rewind(sample)) |
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851 { |
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852 sample->flags |= SOUND_SAMPLEFLAG_ERROR; |
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853 return(0); |
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854 } /* if */ |
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855 |
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856 sample->flags &= !SOUND_SAMPLEFLAG_EAGAIN; |
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857 sample->flags &= !SOUND_SAMPLEFLAG_ERROR; |
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858 sample->flags &= !SOUND_SAMPLEFLAG_EOF; |
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859 |
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860 return(1); |
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861 } /* Sound_Rewind */ |
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862 |
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863 |
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864 int Sound_Seek(Sound_Sample *sample, Uint32 ms) |
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865 { |
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866 Sound_SampleInternal *internal; |
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867 |
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868 BAIL_IF_MACRO(!initialized, ERR_NOT_INITIALIZED, 0); |
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869 if (!(sample->flags & SOUND_SAMPLEFLAG_CANSEEK)) |
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870 BAIL_MACRO(ERR_CANNOT_SEEK, 0); |
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871 |
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872 internal = (Sound_SampleInternal *) sample->opaque; |
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873 BAIL_IF_MACRO(!internal->funcs->seek(sample, ms), NULL, 0); |
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874 |
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875 sample->flags &= !SOUND_SAMPLEFLAG_EAGAIN; |
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876 sample->flags &= !SOUND_SAMPLEFLAG_ERROR; |
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877 sample->flags &= !SOUND_SAMPLEFLAG_EOF; |
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878 |
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879 return(1); |
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880 } /* Sound_Rewind */ |
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881 |
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882 |
| 4 | 883 /* end of SDL_sound.c ... */ |
| 884 |