Mercurial > SDL_sound_CoreAudio
annotate SDL_sound.c @ 287:2444b4128efd
Updated.
author | Ryan C. Gordon <icculus@icculus.org> |
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date | Sat, 16 Mar 2002 08:47:29 +0000 |
parents | 6fe6de401b63 |
children | c97be6e1bd27 |
rev | line source |
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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 | |
107
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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) | |
48
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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 |
163
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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 | |
118
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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 |
48
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230 available_decoders[pos] = NULL; |
26
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231 |
4 | 232 initialized = 1; |
233 return(1); | |
234 } /* Sound_Init */ | |
235 | |
236 | |
237 int Sound_Quit(void) | |
238 { | |
219
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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 | |
237
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245 while (((volatile Sound_Sample *) sample_list) != NULL) |
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246 Sound_FreeSample(sample_list); |
4 | 247 |
237
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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; |
219
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253 |
118
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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) |
80
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264 free((void *) available_decoders); |
4 | 265 available_decoders = NULL; |
266 | |
219
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267 /* clean up error state for each thread... */ |
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268 SDL_LockMutex(errorlist_mutex); |
237
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269 for (err = error_msgs; err != NULL; err = nexterr) |
219
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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 */ |
237
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274 error_msgs = NULL; |
219
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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 | |
219
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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 |
237
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294 if (error_msgs != NULL) |
219
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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) |
219
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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 { | |
219
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316 const char *retval = NULL; |
226
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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(); |
237
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323 if ((err != NULL) && (err->error_available)) |
219
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324 { |
237
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325 retval = err->error_string; |
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326 err->error_available = 0; |
219
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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 { | |
226
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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 */ | |
219
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349 void Sound_SetError(const char *str) |
4 | 350 { |
219
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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 |
226
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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; |
219
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361 |
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362 err = findErrorForCurrentThread(); |
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363 if (err == NULL) |
165
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364 { |
219
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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); |
237
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373 err->next = error_msgs; |
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374 error_msgs = err; |
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375 SDL_UnlockMutex(errorlist_mutex); |
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376 } /* if */ |
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377 |
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378 err->error_available = 1; |
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379 strncpy(err->error_string, str, sizeof (err->error_string)); |
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380 err->error_string[sizeof (err->error_string) - 1] = '\0'; |
4 | 381 } /* Sound_SetError */ |
382 | |
383 | |
384 /* | |
385 * -ansi and -pedantic flags prevent use of strcasecmp() on Linux, and | |
386 * I honestly don't want to mess around with figuring out if a given | |
387 * platform has "strcasecmp", "stricmp", or | |
388 * "compare_two_damned_strings_case_insensitive", which I hear is in the | |
389 * next release of Carbon. :) This is exported so decoders may use it if | |
390 * they like. | |
391 */ | |
392 int __Sound_strcasecmp(const char *x, const char *y) | |
393 { | |
394 int ux, uy; | |
395 | |
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396 if (x == y) /* same pointer? Both NULL? */ |
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397 return(0); |
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398 |
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399 if (x == NULL) |
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400 return(-1); |
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401 |
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402 if (y == NULL) |
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403 return(1); |
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404 |
4 | 405 do |
406 { | |
407 ux = toupper((int) *x); | |
408 uy = toupper((int) *y); | |
409 if (ux > uy) | |
410 return(1); | |
411 else if (ux < uy) | |
412 return(-1); | |
413 x++; | |
414 y++; | |
415 } while ((ux) && (uy)); | |
416 | |
417 return(0); | |
418 } /* __Sound_strcasecmp */ | |
419 | |
420 | |
421 /* | |
422 * Allocate a Sound_Sample, and fill in most of its fields. Those that need | |
423 * to be filled in later, by a decoder, will be initialized to zero. | |
424 */ | |
425 static Sound_Sample *alloc_sample(SDL_RWops *rw, Sound_AudioInfo *desired, | |
426 Uint32 bufferSize) | |
427 { | |
428 Sound_Sample *retval = malloc(sizeof (Sound_Sample)); | |
429 Sound_SampleInternal *internal = malloc(sizeof (Sound_SampleInternal)); | |
430 if ((retval == NULL) || (internal == NULL)) | |
431 { | |
432 Sound_SetError(ERR_OUT_OF_MEMORY); | |
433 if (retval) | |
434 free(retval); | |
435 if (internal) | |
436 free(internal); | |
437 | |
438 return(NULL); | |
439 } /* if */ | |
440 | |
441 memset(retval, '\0', sizeof (Sound_Sample)); | |
442 memset(internal, '\0', sizeof (Sound_SampleInternal)); | |
443 | |
444 assert(bufferSize > 0); | |
445 retval->buffer = malloc(bufferSize); /* pure ugly. */ | |
446 if (!retval->buffer) | |
447 { | |
448 Sound_SetError(ERR_OUT_OF_MEMORY); | |
449 free(internal); | |
450 free(retval); | |
451 return(NULL); | |
452 } /* if */ | |
453 memset(retval->buffer, '\0', bufferSize); | |
454 retval->buffer_size = bufferSize; | |
455 | |
456 if (desired != NULL) | |
457 memcpy(&retval->desired, desired, sizeof (Sound_AudioInfo)); | |
458 | |
459 internal->rw = rw; | |
460 retval->opaque = internal; | |
461 return(retval); | |
462 } /* alloc_sample */ | |
463 | |
464 | |
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465 #if (defined DEBUG_CHATTER) |
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466 static __inline__ const char *fmt_to_str(Uint16 fmt) |
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467 { |
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468 switch(fmt) |
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469 { |
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470 case AUDIO_U8: |
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471 return("U8"); |
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472 case AUDIO_S8: |
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473 return("S8"); |
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474 case AUDIO_U16LSB: |
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475 return("U16LSB"); |
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476 case AUDIO_S16LSB: |
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477 return("S16LSB"); |
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478 case AUDIO_U16MSB: |
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479 return("U16MSB"); |
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480 case AUDIO_S16MSB: |
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481 return("S16MSB"); |
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482 } /* switch */ |
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483 |
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484 return("Unknown"); |
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485 } /* fmt_to_str */ |
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486 #endif |
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487 |
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488 |
4 | 489 /* |
490 * The bulk of the Sound_NewSample() work is done here... | |
491 * Ask the specified decoder to handle the data in (rw), and if | |
492 * so, construct the Sound_Sample. Otherwise, try to wind (rw)'s stream | |
493 * back to where it was, and return false. | |
494 * | |
495 * !!! FIXME: This is big, ugly, nasty, and smelly. | |
496 */ | |
497 static int init_sample(const Sound_DecoderFunctions *funcs, | |
498 Sound_Sample *sample, const char *ext, | |
499 Sound_AudioInfo *_desired) | |
500 { | |
501 Sound_SampleInternal *internal = (Sound_SampleInternal *) sample->opaque; | |
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502 Sound_AudioInfo desired; |
4 | 503 int pos = SDL_RWtell(internal->rw); /* !!! FIXME: Int? Really? */ |
504 | |
505 /* fill in the funcs for this decoder... */ | |
506 sample->decoder = &funcs->info; | |
507 internal->funcs = funcs; | |
508 if (!funcs->open(sample, ext)) | |
509 { | |
510 SDL_RWseek(internal->rw, pos, SEEK_SET); /* set for next try... */ | |
511 return(0); | |
512 } /* if */ | |
513 | |
514 /* success; we've got a decoder! */ | |
515 | |
516 /* Now we need to set up the conversion buffer... */ | |
517 | |
518 memcpy(&desired, (_desired != NULL) ? _desired : &sample->actual, | |
519 sizeof (Sound_AudioInfo)); | |
520 | |
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521 if (Sound_BuildAudioCVT(&internal->sdlcvt, |
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522 sample->actual.format, |
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523 sample->actual.channels, |
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524 sample->actual.rate, |
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525 desired.format, |
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526 desired.channels, |
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527 desired.rate) == -1) |
4 | 528 { |
529 Sound_SetError(SDL_GetError()); | |
530 funcs->close(sample); | |
531 SDL_RWseek(internal->rw, pos, SEEK_SET); /* set for next try... */ | |
532 return(0); | |
533 } /* if */ | |
534 | |
535 if (internal->sdlcvt.len_mult > 1) | |
536 { | |
537 void *rc = realloc(sample->buffer, | |
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538 sample->buffer_size * internal->sdlcvt.len_mult); |
4 | 539 if (rc == NULL) |
540 { | |
541 funcs->close(sample); | |
542 SDL_RWseek(internal->rw, pos, SEEK_SET); /* set for next try... */ | |
543 return(0); | |
544 } /* if */ | |
545 | |
546 sample->buffer = rc; | |
547 } /* if */ | |
548 | |
549 /* these pointers are all one and the same. */ | |
550 memcpy(&sample->desired, &desired, sizeof (Sound_AudioInfo)); | |
551 internal->sdlcvt.buf = internal->buffer = sample->buffer; | |
552 internal->buffer_size = sample->buffer_size / internal->sdlcvt.len_mult; | |
553 internal->sdlcvt.len = internal->buffer_size; | |
554 | |
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555 /* Prepend our new Sound_Sample to the sample_list... */ |
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556 SDL_LockMutex(samplelist_mutex); |
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557 internal->next = sample_list; |
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558 if (sample_list != NULL) |
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559 ((Sound_SampleInternal *) sample_list->opaque)->prev = sample; |
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560 sample_list = sample; |
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561 SDL_UnlockMutex(samplelist_mutex); |
4 | 562 |
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563 SNDDBG(("New sample DESIRED format: %s format, %d rate, %d channels.\n", |
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564 fmt_to_str(sample->desired.format), |
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565 sample->desired.rate, |
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566 sample->desired.channels)); |
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567 |
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568 SNDDBG(("New sample ACTUAL format: %s format, %d rate, %d channels.\n", |
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569 fmt_to_str(sample->actual.format), |
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570 sample->actual.rate, |
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571 sample->actual.channels)); |
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572 |
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573 SNDDBG(("On-the-fly conversion: %s.\n", |
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574 internal->sdlcvt.needed ? "ENABLED" : "DISABLED")); |
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575 |
4 | 576 return(1); |
577 } /* init_sample */ | |
578 | |
579 | |
580 Sound_Sample *Sound_NewSample(SDL_RWops *rw, const char *ext, | |
581 Sound_AudioInfo *desired, Uint32 bSize) | |
582 { | |
583 Sound_Sample *retval; | |
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584 decoder_element *decoder; |
4 | 585 |
586 /* sanity checks. */ | |
587 BAIL_IF_MACRO(!initialized, ERR_NOT_INITIALIZED, NULL); | |
588 BAIL_IF_MACRO(rw == NULL, ERR_INVALID_ARGUMENT, NULL); | |
589 | |
590 retval = alloc_sample(rw, desired, bSize); | |
591 if (!retval) | |
592 return(NULL); /* alloc_sample() sets error message... */ | |
593 | |
594 if (ext != NULL) | |
595 { | |
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596 for (decoder = &decoders[0]; decoder->funcs != NULL; decoder++) |
4 | 597 { |
149
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598 if (decoder->available) |
4 | 599 { |
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600 const char **decoderExt = decoder->funcs->info.extensions; |
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601 while (*decoderExt) |
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602 { |
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603 if (__Sound_strcasecmp(*decoderExt, ext) == 0) |
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604 { |
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605 if (init_sample(decoder->funcs, retval, ext, desired)) |
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606 return(retval); |
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607 break; /* done with this decoder either way. */ |
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608 } /* if */ |
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609 decoderExt++; |
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610 } /* while */ |
4 | 611 } /* if */ |
612 } /* for */ | |
613 } /* if */ | |
614 | |
615 /* no direct extension match? Try everything we've got... */ | |
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616 for (decoder = &decoders[0]; decoder->funcs != NULL; decoder++) |
4 | 617 { |
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618 if (decoder->available) |
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619 { |
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620 int should_try = 1; |
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621 const char **decoderExt = decoder->funcs->info.extensions; |
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622 |
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623 /* skip if we would have tried decoder above... */ |
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624 while (*decoderExt) |
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625 { |
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626 if (__Sound_strcasecmp(*decoderExt, ext) == 0) |
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627 { |
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628 should_try = 0; |
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629 break; |
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630 } /* if */ |
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631 decoderExt++; |
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632 } /* while */ |
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633 |
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634 if (should_try) |
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635 { |
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636 if (init_sample(decoder->funcs, retval, ext, desired)) |
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637 return(retval); |
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638 } /* if */ |
48
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639 } /* if */ |
4 | 640 } /* for */ |
641 | |
642 /* nothing could handle the sound data... */ | |
643 free(retval->opaque); | |
644 if (retval->buffer != NULL) | |
645 free(retval->buffer); | |
646 free(retval); | |
647 SDL_RWclose(rw); | |
648 Sound_SetError(ERR_UNSUPPORTED_FORMAT); | |
649 return(NULL); | |
650 } /* Sound_NewSample */ | |
651 | |
652 | |
653 Sound_Sample *Sound_NewSampleFromFile(const char *filename, | |
654 Sound_AudioInfo *desired, | |
655 Uint32 bufferSize) | |
656 { | |
657 const char *ext; | |
658 SDL_RWops *rw; | |
659 | |
660 BAIL_IF_MACRO(!initialized, ERR_NOT_INITIALIZED, NULL); | |
661 BAIL_IF_MACRO(filename == NULL, ERR_INVALID_ARGUMENT, NULL); | |
662 | |
663 ext = strrchr(filename, '.'); | |
664 rw = SDL_RWFromFile(filename, "rb"); | |
665 BAIL_IF_MACRO(rw == NULL, SDL_GetError(), NULL); | |
666 | |
667 if (ext != NULL) | |
668 ext++; | |
669 | |
670 return(Sound_NewSample(rw, ext, desired, bufferSize)); | |
671 } /* Sound_NewSampleFromFile */ | |
672 | |
673 | |
674 void Sound_FreeSample(Sound_Sample *sample) | |
675 { | |
676 Sound_SampleInternal *internal; | |
677 | |
678 if (!initialized) | |
679 { | |
680 Sound_SetError(ERR_NOT_INITIALIZED); | |
681 return; | |
682 } /* if */ | |
683 | |
684 if (sample == NULL) | |
685 { | |
686 Sound_SetError(ERR_INVALID_ARGUMENT); | |
687 return; | |
688 } /* if */ | |
689 | |
690 internal = (Sound_SampleInternal *) sample->opaque; | |
691 | |
237
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692 SDL_LockMutex(samplelist_mutex); |
4 | 693 |
237
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694 /* update the sample_list... */ |
4 | 695 if (internal->prev != NULL) |
696 { | |
697 Sound_SampleInternal *prevInternal; | |
698 prevInternal = (Sound_SampleInternal *) internal->prev->opaque; | |
699 prevInternal->next = internal->next; | |
700 } /* if */ | |
701 else | |
702 { | |
237
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703 assert(sample_list == sample); |
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704 sample_list = internal->next; |
4 | 705 } /* else */ |
706 | |
707 if (internal->next != NULL) | |
708 { | |
709 Sound_SampleInternal *nextInternal; | |
710 nextInternal = (Sound_SampleInternal *) internal->next->opaque; | |
711 nextInternal->prev = internal->prev; | |
712 } /* if */ | |
713 | |
237
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714 SDL_UnlockMutex(samplelist_mutex); |
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715 |
4 | 716 /* nuke it... */ |
237
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717 internal->funcs->close(sample); |
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718 |
4 | 719 if (internal->rw != NULL) /* this condition is a "just in case" thing. */ |
720 SDL_RWclose(internal->rw); | |
167
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721 |
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722 if ((internal->buffer != NULL) && (internal->buffer != sample->buffer)) |
4 | 723 free(internal->buffer); |
167
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724 |
4 | 725 free(internal); |
167
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726 |
4 | 727 if (sample->buffer != NULL) |
728 free(sample->buffer); | |
167
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729 |
4 | 730 free(sample); |
731 } /* Sound_FreeSample */ | |
732 | |
733 | |
734 int Sound_SetBufferSize(Sound_Sample *sample, Uint32 newSize) | |
735 { | |
736 void *newBuf = NULL; | |
737 Sound_SampleInternal *internal = NULL; | |
738 | |
739 BAIL_IF_MACRO(!initialized, ERR_NOT_INITIALIZED, 0); | |
740 BAIL_IF_MACRO(sample == NULL, ERR_INVALID_ARGUMENT, 0); | |
741 internal = ((Sound_SampleInternal *) sample->opaque); | |
742 newBuf = realloc(sample->buffer, newSize * internal->sdlcvt.len_mult); | |
743 BAIL_IF_MACRO(newBuf == NULL, ERR_OUT_OF_MEMORY, 0); | |
744 | |
745 internal->sdlcvt.buf = internal->buffer = sample->buffer = newBuf; | |
746 sample->buffer_size = newSize; | |
747 internal->buffer_size = newSize / internal->sdlcvt.len_mult; | |
748 internal->sdlcvt.len = internal->buffer_size; | |
749 | |
750 return(1); | |
751 } /* Sound_SetBufferSize */ | |
752 | |
753 | |
754 Uint32 Sound_Decode(Sound_Sample *sample) | |
755 { | |
756 Sound_SampleInternal *internal = NULL; | |
757 Uint32 retval = 0; | |
758 | |
759 /* a boatload of sanity checks... */ | |
760 BAIL_IF_MACRO(!initialized, ERR_NOT_INITIALIZED, 0); | |
761 BAIL_IF_MACRO(sample == NULL, ERR_INVALID_ARGUMENT, 0); | |
762 BAIL_IF_MACRO(sample->flags & SOUND_SAMPLEFLAG_ERROR, ERR_PREV_ERROR, 0); | |
763 BAIL_IF_MACRO(sample->flags & SOUND_SAMPLEFLAG_EOF, ERR_PREV_EOF, 0); | |
764 | |
765 internal = (Sound_SampleInternal *) sample->opaque; | |
766 | |
767 assert(sample->buffer != NULL); | |
768 assert(sample->buffer_size > 0); | |
769 assert(internal->buffer != NULL); | |
770 assert(internal->buffer_size > 0); | |
771 | |
772 /* reset EAGAIN. Decoder can flip it back on if it needs to. */ | |
773 sample->flags &= !SOUND_SAMPLEFLAG_EAGAIN; | |
774 retval = internal->funcs->read(sample); | |
37
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775 |
163
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776 if (retval > 0 && internal->sdlcvt.needed) |
4 | 777 { |
778 internal->sdlcvt.len = retval; | |
143
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779 Sound_ConvertAudio(&internal->sdlcvt); |
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780 retval = internal->sdlcvt.len_cvt; |
4 | 781 } /* if */ |
782 | |
783 return(retval); | |
784 } /* Sound_Decode */ | |
785 | |
786 | |
787 Uint32 Sound_DecodeAll(Sound_Sample *sample) | |
788 { | |
789 Sound_SampleInternal *internal = NULL; | |
790 void *buf = NULL; | |
791 Uint32 newBufSize = 0; | |
792 | |
793 BAIL_IF_MACRO(!initialized, ERR_NOT_INITIALIZED, 0); | |
172
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794 BAIL_IF_MACRO(sample->flags & SOUND_SAMPLEFLAG_EOF, ERR_PREV_EOF, 0); |
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795 BAIL_IF_MACRO(sample->flags & SOUND_SAMPLEFLAG_ERROR, ERR_PREV_ERROR, 0); |
4 | 796 |
797 internal = (Sound_SampleInternal *) sample->opaque; | |
798 | |
799 while ( ((sample->flags & SOUND_SAMPLEFLAG_EOF) == 0) && | |
800 ((sample->flags & SOUND_SAMPLEFLAG_ERROR) == 0) ) | |
801 { | |
172
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802 Uint32 br = Sound_Decode(sample); |
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803 void *ptr = realloc(buf, newBufSize + br); |
4 | 804 if (ptr == NULL) |
805 { | |
806 sample->flags |= SOUND_SAMPLEFLAG_ERROR; | |
807 Sound_SetError(ERR_OUT_OF_MEMORY); | |
808 } /* if */ | |
809 else | |
810 { | |
167
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811 buf = ptr; |
4 | 812 memcpy( ((char *) buf) + newBufSize, sample->buffer, br ); |
813 newBufSize += br; | |
814 } /* else */ | |
815 } /* while */ | |
816 | |
172
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817 if (buf == NULL) /* ...in case first call to realloc() fails... */ |
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818 return(sample->buffer_size); |
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819 |
167
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820 if (internal->buffer != sample->buffer) |
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821 free(internal->buffer); |
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822 |
4 | 823 free(sample->buffer); |
167
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824 |
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825 internal->sdlcvt.buf = internal->buffer = sample->buffer = buf; |
4 | 826 sample->buffer_size = newBufSize; |
827 internal->buffer_size = newBufSize / internal->sdlcvt.len_mult; | |
167
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828 internal->sdlcvt.len = internal->buffer_size; |
4 | 829 |
830 return(newBufSize); | |
831 } /* Sound_DecodeAll */ | |
832 | |
223
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833 |
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834 int Sound_Rewind(Sound_Sample *sample) |
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835 { |
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836 Sound_SampleInternal *internal; |
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837 BAIL_IF_MACRO(!initialized, ERR_NOT_INITIALIZED, 0); |
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838 |
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839 internal = (Sound_SampleInternal *) sample->opaque; |
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840 if (!internal->funcs->rewind(sample)) |
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841 { |
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842 sample->flags |= SOUND_SAMPLEFLAG_ERROR; |
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843 return(0); |
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844 } /* if */ |
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845 |
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846 sample->flags &= !SOUND_SAMPLEFLAG_EAGAIN; |
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847 sample->flags &= !SOUND_SAMPLEFLAG_ERROR; |
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848 sample->flags &= !SOUND_SAMPLEFLAG_EOF; |
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849 return(1); |
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850 } /* Sound_Rewind */ |
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851 |
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852 |
4 | 853 /* end of SDL_sound.c ... */ |
854 |