Mercurial > SDL_sound_CoreAudio
annotate SDL_sound.c @ 432:ddce7101673e
Call SDL_InitSubSystem instead of SDL_Init, to prevent unwanted initialization
of the SDL parachute.
author | Ryan C. Gordon <icculus@icculus.org> |
---|---|
date | Tue, 10 Dec 2002 02:15:32 +0000 |
parents | 9d0b5ec9cc26 |
children | 5b00e43ec23c |
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 | |
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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 <ctype.h> | |
39 | |
40 #include "SDL.h" | |
41 #include "SDL_sound.h" | |
42 | |
43 #define __SDL_SOUND_INTERNAL__ | |
44 #include "SDL_sound_internal.h" | |
45 | |
46 | |
47 /* The various decoder drivers... */ | |
48 | |
262 | 49 #if (defined SOUND_SUPPORTS_SMPEG) |
50 extern const Sound_DecoderFunctions __Sound_DecoderFunctions_SMPEG; | |
51 #endif | |
52 | |
53 #if (defined SOUND_SUPPORTS_MPGLIB) | |
54 extern const Sound_DecoderFunctions __Sound_DecoderFunctions_MPGLIB; | |
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55 #endif |
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56 |
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57 #if (defined SOUND_SUPPORTS_MIKMOD) |
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58 extern const Sound_DecoderFunctions __Sound_DecoderFunctions_MIKMOD; |
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59 #endif |
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60 |
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61 #if (defined SOUND_SUPPORTS_MODPLUG) |
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62 extern const Sound_DecoderFunctions __Sound_DecoderFunctions_MODPLUG; |
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63 #endif |
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64 |
20 | 65 #if (defined SOUND_SUPPORTS_WAV) |
66 extern const Sound_DecoderFunctions __Sound_DecoderFunctions_WAV; | |
67 #endif | |
68 | |
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69 #if (defined SOUND_SUPPORTS_AIFF) |
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70 extern const Sound_DecoderFunctions __Sound_DecoderFunctions_AIFF; |
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71 #endif |
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72 |
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73 #if (defined SOUND_SUPPORTS_AU) |
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74 extern const Sound_DecoderFunctions __Sound_DecoderFunctions_AU; |
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75 #endif |
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76 |
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77 #if (defined SOUND_SUPPORTS_OGG) |
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78 extern const Sound_DecoderFunctions __Sound_DecoderFunctions_OGG; |
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79 #endif |
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80 |
4 | 81 #if (defined SOUND_SUPPORTS_VOC) |
82 extern const Sound_DecoderFunctions __Sound_DecoderFunctions_VOC; | |
83 #endif | |
84 | |
85 #if (defined SOUND_SUPPORTS_RAW) | |
86 extern const Sound_DecoderFunctions __Sound_DecoderFunctions_RAW; | |
87 #endif | |
88 | |
102 | 89 #if (defined SOUND_SUPPORTS_SHN) |
90 extern const Sound_DecoderFunctions __Sound_DecoderFunctions_SHN; | |
91 #endif | |
92 | |
110 | 93 #if (defined SOUND_SUPPORTS_MIDI) |
94 extern const Sound_DecoderFunctions __Sound_DecoderFunctions_MIDI; | |
95 #endif | |
96 | |
157 | 97 #if (defined SOUND_SUPPORTS_FLAC) |
98 extern const Sound_DecoderFunctions __Sound_DecoderFunctions_FLAC; | |
99 #endif | |
100 | |
322 | 101 #if (defined SOUND_SUPPORTS_QUICKTIME) |
102 extern const Sound_DecoderFunctions __Sound_DecoderFunctions_QuickTime; | |
103 #endif | |
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104 |
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105 typedef struct |
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106 { |
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107 int available; |
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108 const Sound_DecoderFunctions *funcs; |
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109 } decoder_element; |
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110 |
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111 static decoder_element decoders[] = |
4 | 112 { |
262 | 113 #if (defined SOUND_SUPPORTS_SMPEG) |
114 { 0, &__Sound_DecoderFunctions_SMPEG }, | |
115 #endif | |
116 | |
117 #if (defined SOUND_SUPPORTS_MPGLIB) | |
118 { 0, &__Sound_DecoderFunctions_MPGLIB }, | |
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119 #endif |
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120 |
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121 #if (defined SOUND_SUPPORTS_MODPLUG) |
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122 { 0, &__Sound_DecoderFunctions_MODPLUG }, |
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123 #endif |
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124 |
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125 #if (defined SOUND_SUPPORTS_MIKMOD) |
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126 { 0, &__Sound_DecoderFunctions_MIKMOD }, |
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127 #endif |
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128 |
20 | 129 #if (defined SOUND_SUPPORTS_WAV) |
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130 { 0, &__Sound_DecoderFunctions_WAV }, |
20 | 131 #endif |
132 | |
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133 #if (defined SOUND_SUPPORTS_AIFF) |
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134 { 0, &__Sound_DecoderFunctions_AIFF }, |
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135 #endif |
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136 |
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137 #if (defined SOUND_SUPPORTS_AU) |
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138 { 0, &__Sound_DecoderFunctions_AU }, |
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139 #endif |
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140 |
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141 #if (defined SOUND_SUPPORTS_OGG) |
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142 { 0, &__Sound_DecoderFunctions_OGG }, |
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143 #endif |
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144 |
4 | 145 #if (defined SOUND_SUPPORTS_VOC) |
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146 { 0, &__Sound_DecoderFunctions_VOC }, |
4 | 147 #endif |
148 | |
149 #if (defined SOUND_SUPPORTS_RAW) | |
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150 { 0, &__Sound_DecoderFunctions_RAW }, |
4 | 151 #endif |
102 | 152 |
153 #if (defined SOUND_SUPPORTS_SHN) | |
154 { 0, &__Sound_DecoderFunctions_SHN }, | |
155 #endif | |
110 | 156 |
163
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157 #if (defined SOUND_SUPPORTS_FLAC) |
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158 { 0, &__Sound_DecoderFunctions_FLAC }, |
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159 #endif |
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160 |
110 | 161 #if (defined SOUND_SUPPORTS_MIDI) |
162 { 0, &__Sound_DecoderFunctions_MIDI }, | |
163 #endif | |
118
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164 |
322 | 165 #if (defined SOUND_SUPPORTS_QUICKTIME) |
166 { 0, &__Sound_DecoderFunctions_QuickTime }, | |
167 #endif | |
168 | |
118
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169 { 0, NULL } |
4 | 170 }; |
171 | |
172 | |
173 | |
174 /* General SDL_sound state ... */ | |
175 | |
219
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176 typedef struct __SOUND_ERRMSGTYPE__ |
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177 { |
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178 Uint32 tid; |
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179 int error_available; |
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180 char error_string[128]; |
219
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181 struct __SOUND_ERRMSGTYPE__ *next; |
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182 } ErrMsg; |
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183 |
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184 static ErrMsg *error_msgs = NULL; |
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185 static SDL_mutex *errorlist_mutex = NULL; |
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186 |
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187 static Sound_Sample *sample_list = NULL; /* this is a linked list. */ |
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188 static SDL_mutex *samplelist_mutex = NULL; |
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189 |
4 | 190 static const Sound_DecoderInfo **available_decoders = NULL; |
219
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191 static int initialized = 0; |
4 | 192 |
193 | |
194 /* functions ... */ | |
195 | |
196 void Sound_GetLinkedVersion(Sound_Version *ver) | |
197 { | |
198 if (ver != NULL) | |
199 { | |
200 ver->major = SOUND_VER_MAJOR; | |
201 ver->minor = SOUND_VER_MINOR; | |
202 ver->patch = SOUND_VER_PATCH; | |
203 } /* if */ | |
204 } /* Sound_GetLinkedVersion */ | |
205 | |
206 | |
207 int Sound_Init(void) | |
208 { | |
209 size_t i; | |
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210 size_t pos = 0; |
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211 size_t total = sizeof (decoders) / sizeof (decoders[0]); |
4 | 212 BAIL_IF_MACRO(initialized, ERR_IS_INITIALIZED, 0); |
219
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213 |
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214 sample_list = NULL; |
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215 error_msgs = NULL; |
4 | 216 |
217 available_decoders = (const Sound_DecoderInfo **) | |
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218 malloc((total) * sizeof (Sound_DecoderInfo *)); |
4 | 219 BAIL_IF_MACRO(available_decoders == NULL, ERR_OUT_OF_MEMORY, 0); |
220 | |
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221 SDL_InitSubSystem(SDL_INIT_AUDIO); |
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222 |
226
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223 errorlist_mutex = SDL_CreateMutex(); |
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224 |
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225 for (i = 0; decoders[i].funcs != NULL; i++) |
48
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226 { |
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227 decoders[i].available = decoders[i].funcs->init(); |
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228 if (decoders[i].available) |
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229 { |
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230 available_decoders[pos] = &(decoders[i].funcs->info); |
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231 pos++; |
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232 } /* if */ |
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233 } /* for */ |
4 | 234 |
48
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235 available_decoders[pos] = NULL; |
26
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236 |
4 | 237 initialized = 1; |
238 return(1); | |
239 } /* Sound_Init */ | |
240 | |
241 | |
242 int Sound_Quit(void) | |
243 { | |
219
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244 ErrMsg *err; |
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245 ErrMsg *nexterr = NULL; |
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246 size_t i; |
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247 |
4 | 248 BAIL_IF_MACRO(!initialized, ERR_NOT_INITIALIZED, 0); |
249 | |
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250 while (((volatile Sound_Sample *) sample_list) != NULL) |
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251 Sound_FreeSample(sample_list); |
4 | 252 |
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253 initialized = 0; |
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254 |
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255 SDL_DestroyMutex(samplelist_mutex); |
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256 samplelist_mutex = NULL; |
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257 sample_list = NULL; |
219
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258 |
118
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259 for (i = 0; decoders[i].funcs != NULL; i++) |
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260 { |
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261 if (decoders[i].available) |
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262 { |
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263 decoders[i].funcs->quit(); |
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264 decoders[i].available = 0; |
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265 } /* if */ |
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266 } /* for */ |
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267 |
4 | 268 if (available_decoders != NULL) |
80
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269 free((void *) available_decoders); |
4 | 270 available_decoders = NULL; |
271 | |
219
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272 /* clean up error state for each thread... */ |
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273 SDL_LockMutex(errorlist_mutex); |
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274 for (err = error_msgs; err != NULL; err = nexterr) |
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275 { |
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276 nexterr = err->next; |
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277 free(err); |
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278 } /* for */ |
237
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279 error_msgs = NULL; |
219
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280 SDL_UnlockMutex(errorlist_mutex); |
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281 SDL_DestroyMutex(errorlist_mutex); |
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282 errorlist_mutex = NULL; |
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283 |
4 | 284 return(1); |
285 } /* Sound_Quit */ | |
286 | |
287 | |
288 const Sound_DecoderInfo **Sound_AvailableDecoders(void) | |
289 { | |
290 return(available_decoders); /* READ. ONLY. */ | |
291 } /* Sound_AvailableDecoders */ | |
292 | |
293 | |
219
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294 static ErrMsg *findErrorForCurrentThread(void) |
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295 { |
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296 ErrMsg *i; |
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297 Uint32 tid; |
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298 |
237
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299 if (error_msgs != NULL) |
219
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300 { |
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301 tid = SDL_ThreadID(); |
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302 |
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303 SDL_LockMutex(errorlist_mutex); |
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304 for (i = error_msgs; i != NULL; i = i->next) |
219
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305 { |
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306 if (i->tid == tid) |
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307 { |
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308 SDL_UnlockMutex(errorlist_mutex); |
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309 return(i); |
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310 } /* if */ |
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311 } /* for */ |
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312 SDL_UnlockMutex(errorlist_mutex); |
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313 } /* if */ |
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314 |
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315 return(NULL); /* no error available. */ |
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316 } /* findErrorForCurrentThread */ |
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317 |
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318 |
4 | 319 const char *Sound_GetError(void) |
320 { | |
219
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321 const char *retval = NULL; |
226
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322 ErrMsg *err; |
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323 |
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324 if (!initialized) |
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325 return(ERR_NOT_INITIALIZED); |
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326 |
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327 err = findErrorForCurrentThread(); |
237
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328 if ((err != NULL) && (err->error_available)) |
219
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329 { |
237
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330 retval = err->error_string; |
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331 err->error_available = 0; |
219
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332 } /* if */ |
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333 |
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334 return(retval); |
4 | 335 } /* Sound_GetError */ |
336 | |
337 | |
338 void Sound_ClearError(void) | |
339 { | |
226
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340 ErrMsg *err; |
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341 |
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342 if (!initialized) |
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343 return; |
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344 |
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345 err = findErrorForCurrentThread(); |
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346 if (err != NULL) |
237
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347 err->error_available = 0; |
4 | 348 } /* Sound_ClearError */ |
349 | |
350 | |
351 /* | |
352 * This is declared in the internal header. | |
353 */ | |
306
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354 void __Sound_SetError(const char *str) |
4 | 355 { |
219
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356 ErrMsg *err; |
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357 |
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358 if (str == NULL) |
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359 return; |
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360 |
387
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361 SNDDBG(("__Sound_SetError(\"%s\");%s\n", str, |
226
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362 (initialized) ? "" : " [NOT INITIALIZED!]")); |
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363 |
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364 if (!initialized) |
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365 return; |
219
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366 |
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367 err = findErrorForCurrentThread(); |
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368 if (err == NULL) |
165
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369 { |
219
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370 err = (ErrMsg *) malloc(sizeof (ErrMsg)); |
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371 if (err == NULL) |
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372 return; /* uhh...? */ |
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373 |
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374 memset((void *) err, '\0', sizeof (ErrMsg)); |
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375 err->tid = SDL_ThreadID(); |
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376 |
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377 SDL_LockMutex(errorlist_mutex); |
237
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378 err->next = error_msgs; |
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379 error_msgs = err; |
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380 SDL_UnlockMutex(errorlist_mutex); |
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381 } /* if */ |
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382 |
237
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383 err->error_available = 1; |
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384 strncpy(err->error_string, str, sizeof (err->error_string)); |
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385 err->error_string[sizeof (err->error_string) - 1] = '\0'; |
306
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386 } /* __Sound_SetError */ |
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387 |
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388 |
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389 Uint32 __Sound_convertMsToBytePos(Sound_AudioInfo *info, Uint32 ms) |
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390 { |
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391 /* "frames" == "sample frames" */ |
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392 float frames_per_ms = ((float) info->rate) / 1000.0; |
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393 Uint32 frame_offset = (Uint32) (frames_per_ms * ((float) ms)); |
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394 Uint32 frame_size = (Uint32) ((info->format & 0xFF) / 8) * info->channels; |
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395 return(frame_offset * frame_size); |
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396 } /* __Sound_convertMsToBytePos */ |
4 | 397 |
398 | |
399 /* | |
400 * -ansi and -pedantic flags prevent use of strcasecmp() on Linux, and | |
401 * I honestly don't want to mess around with figuring out if a given | |
402 * platform has "strcasecmp", "stricmp", or | |
403 * "compare_two_damned_strings_case_insensitive", which I hear is in the | |
404 * next release of Carbon. :) This is exported so decoders may use it if | |
405 * they like. | |
406 */ | |
407 int __Sound_strcasecmp(const char *x, const char *y) | |
408 { | |
409 int ux, uy; | |
410 | |
98
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411 if (x == y) /* same pointer? Both NULL? */ |
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412 return(0); |
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413 |
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414 if (x == NULL) |
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415 return(-1); |
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416 |
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417 if (y == NULL) |
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418 return(1); |
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419 |
4 | 420 do |
421 { | |
422 ux = toupper((int) *x); | |
423 uy = toupper((int) *y); | |
424 if (ux > uy) | |
425 return(1); | |
426 else if (ux < uy) | |
427 return(-1); | |
428 x++; | |
429 y++; | |
430 } while ((ux) && (uy)); | |
431 | |
432 return(0); | |
433 } /* __Sound_strcasecmp */ | |
434 | |
435 | |
436 /* | |
437 * Allocate a Sound_Sample, and fill in most of its fields. Those that need | |
438 * to be filled in later, by a decoder, will be initialized to zero. | |
439 */ | |
440 static Sound_Sample *alloc_sample(SDL_RWops *rw, Sound_AudioInfo *desired, | |
441 Uint32 bufferSize) | |
442 { | |
443 Sound_Sample *retval = malloc(sizeof (Sound_Sample)); | |
444 Sound_SampleInternal *internal = malloc(sizeof (Sound_SampleInternal)); | |
445 if ((retval == NULL) || (internal == NULL)) | |
446 { | |
387
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447 __Sound_SetError(ERR_OUT_OF_MEMORY); |
4 | 448 if (retval) |
449 free(retval); | |
450 if (internal) | |
451 free(internal); | |
452 | |
453 return(NULL); | |
454 } /* if */ | |
455 | |
456 memset(retval, '\0', sizeof (Sound_Sample)); | |
457 memset(internal, '\0', sizeof (Sound_SampleInternal)); | |
458 | |
459 assert(bufferSize > 0); | |
460 retval->buffer = malloc(bufferSize); /* pure ugly. */ | |
461 if (!retval->buffer) | |
462 { | |
387
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463 __Sound_SetError(ERR_OUT_OF_MEMORY); |
4 | 464 free(internal); |
465 free(retval); | |
466 return(NULL); | |
467 } /* if */ | |
468 memset(retval->buffer, '\0', bufferSize); | |
469 retval->buffer_size = bufferSize; | |
470 | |
471 if (desired != NULL) | |
472 memcpy(&retval->desired, desired, sizeof (Sound_AudioInfo)); | |
473 | |
474 internal->rw = rw; | |
475 retval->opaque = internal; | |
476 return(retval); | |
477 } /* alloc_sample */ | |
478 | |
479 | |
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480 #if (defined DEBUG_CHATTER) |
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481 static __inline__ const char *fmt_to_str(Uint16 fmt) |
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482 { |
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483 switch(fmt) |
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484 { |
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485 case AUDIO_U8: |
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486 return("U8"); |
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487 case AUDIO_S8: |
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488 return("S8"); |
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489 case AUDIO_U16LSB: |
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490 return("U16LSB"); |
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491 case AUDIO_S16LSB: |
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492 return("S16LSB"); |
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493 case AUDIO_U16MSB: |
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494 return("U16MSB"); |
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495 case AUDIO_S16MSB: |
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496 return("S16MSB"); |
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497 } /* switch */ |
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498 |
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499 return("Unknown"); |
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500 } /* fmt_to_str */ |
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501 #endif |
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502 |
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503 |
4 | 504 /* |
505 * The bulk of the Sound_NewSample() work is done here... | |
506 * Ask the specified decoder to handle the data in (rw), and if | |
507 * so, construct the Sound_Sample. Otherwise, try to wind (rw)'s stream | |
508 * back to where it was, and return false. | |
509 */ | |
510 static int init_sample(const Sound_DecoderFunctions *funcs, | |
511 Sound_Sample *sample, const char *ext, | |
512 Sound_AudioInfo *_desired) | |
513 { | |
514 Sound_SampleInternal *internal = (Sound_SampleInternal *) sample->opaque; | |
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515 Sound_AudioInfo desired; |
400 | 516 int pos = SDL_RWtell(internal->rw); |
4 | 517 |
518 /* fill in the funcs for this decoder... */ | |
519 sample->decoder = &funcs->info; | |
520 internal->funcs = funcs; | |
521 if (!funcs->open(sample, ext)) | |
522 { | |
523 SDL_RWseek(internal->rw, pos, SEEK_SET); /* set for next try... */ | |
524 return(0); | |
525 } /* if */ | |
526 | |
527 /* success; we've got a decoder! */ | |
528 | |
529 /* Now we need to set up the conversion buffer... */ | |
530 | |
531 memcpy(&desired, (_desired != NULL) ? _desired : &sample->actual, | |
532 sizeof (Sound_AudioInfo)); | |
533 | |
340
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534 if (desired.format == 0) |
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535 desired.format = sample->actual.format; |
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536 if (desired.channels == 0) |
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537 desired.channels = sample->actual.channels; |
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538 if (desired.rate == 0) |
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539 desired.rate = sample->actual.rate; |
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540 |
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541 if (Sound_BuildAudioCVT(&internal->sdlcvt, |
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542 sample->actual.format, |
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543 sample->actual.channels, |
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544 sample->actual.rate, |
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545 desired.format, |
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546 desired.channels, |
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547 desired.rate, |
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548 sample->buffer_size) == -1) |
4 | 549 { |
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550 __Sound_SetError(SDL_GetError()); |
4 | 551 funcs->close(sample); |
552 SDL_RWseek(internal->rw, pos, SEEK_SET); /* set for next try... */ | |
553 return(0); | |
554 } /* if */ | |
555 | |
556 if (internal->sdlcvt.len_mult > 1) | |
557 { | |
558 void *rc = realloc(sample->buffer, | |
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559 sample->buffer_size * internal->sdlcvt.len_mult); |
4 | 560 if (rc == NULL) |
561 { | |
562 funcs->close(sample); | |
563 SDL_RWseek(internal->rw, pos, SEEK_SET); /* set for next try... */ | |
564 return(0); | |
565 } /* if */ | |
566 | |
567 sample->buffer = rc; | |
568 } /* if */ | |
569 | |
570 /* these pointers are all one and the same. */ | |
571 memcpy(&sample->desired, &desired, sizeof (Sound_AudioInfo)); | |
572 internal->sdlcvt.buf = internal->buffer = sample->buffer; | |
573 internal->buffer_size = sample->buffer_size / internal->sdlcvt.len_mult; | |
574 internal->sdlcvt.len = internal->buffer_size; | |
575 | |
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576 /* Prepend our new Sound_Sample to the sample_list... */ |
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577 SDL_LockMutex(samplelist_mutex); |
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578 internal->next = sample_list; |
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579 if (sample_list != NULL) |
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580 ((Sound_SampleInternal *) sample_list->opaque)->prev = sample; |
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581 sample_list = sample; |
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582 SDL_UnlockMutex(samplelist_mutex); |
4 | 583 |
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584 SNDDBG(("New sample DESIRED format: %s format, %d rate, %d channels.\n", |
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585 fmt_to_str(sample->desired.format), |
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586 sample->desired.rate, |
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587 sample->desired.channels)); |
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588 |
62
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589 SNDDBG(("New sample ACTUAL format: %s format, %d rate, %d channels.\n", |
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590 fmt_to_str(sample->actual.format), |
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591 sample->actual.rate, |
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592 sample->actual.channels)); |
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593 |
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594 SNDDBG(("On-the-fly conversion: %s.\n", |
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595 internal->sdlcvt.needed ? "ENABLED" : "DISABLED")); |
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596 |
4 | 597 return(1); |
598 } /* init_sample */ | |
599 | |
600 | |
601 Sound_Sample *Sound_NewSample(SDL_RWops *rw, const char *ext, | |
602 Sound_AudioInfo *desired, Uint32 bSize) | |
603 { | |
604 Sound_Sample *retval; | |
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605 decoder_element *decoder; |
4 | 606 |
607 /* sanity checks. */ | |
608 BAIL_IF_MACRO(!initialized, ERR_NOT_INITIALIZED, NULL); | |
609 BAIL_IF_MACRO(rw == NULL, ERR_INVALID_ARGUMENT, NULL); | |
610 | |
611 retval = alloc_sample(rw, desired, bSize); | |
612 if (!retval) | |
613 return(NULL); /* alloc_sample() sets error message... */ | |
614 | |
615 if (ext != NULL) | |
616 { | |
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617 for (decoder = &decoders[0]; decoder->funcs != NULL; decoder++) |
4 | 618 { |
149
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619 if (decoder->available) |
4 | 620 { |
149
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621 const char **decoderExt = decoder->funcs->info.extensions; |
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622 while (*decoderExt) |
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623 { |
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624 if (__Sound_strcasecmp(*decoderExt, ext) == 0) |
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625 { |
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626 if (init_sample(decoder->funcs, retval, ext, desired)) |
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627 return(retval); |
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628 break; /* done with this decoder either way. */ |
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629 } /* if */ |
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630 decoderExt++; |
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631 } /* while */ |
4 | 632 } /* if */ |
633 } /* for */ | |
634 } /* if */ | |
635 | |
636 /* no direct extension match? Try everything we've got... */ | |
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637 for (decoder = &decoders[0]; decoder->funcs != NULL; decoder++) |
4 | 638 { |
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639 if (decoder->available) |
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640 { |
237
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641 int should_try = 1; |
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642 const char **decoderExt = decoder->funcs->info.extensions; |
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643 |
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644 /* skip if we would have tried decoder above... */ |
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645 while (*decoderExt) |
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646 { |
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647 if (__Sound_strcasecmp(*decoderExt, ext) == 0) |
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648 { |
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649 should_try = 0; |
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650 break; |
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651 } /* if */ |
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652 decoderExt++; |
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653 } /* while */ |
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654 |
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655 if (should_try) |
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656 { |
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657 if (init_sample(decoder->funcs, retval, ext, desired)) |
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658 return(retval); |
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659 } /* if */ |
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660 } /* if */ |
4 | 661 } /* for */ |
662 | |
663 /* nothing could handle the sound data... */ | |
664 free(retval->opaque); | |
665 if (retval->buffer != NULL) | |
666 free(retval->buffer); | |
667 free(retval); | |
668 SDL_RWclose(rw); | |
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669 __Sound_SetError(ERR_UNSUPPORTED_FORMAT); |
4 | 670 return(NULL); |
671 } /* Sound_NewSample */ | |
672 | |
673 | |
674 Sound_Sample *Sound_NewSampleFromFile(const char *filename, | |
675 Sound_AudioInfo *desired, | |
676 Uint32 bufferSize) | |
677 { | |
678 const char *ext; | |
679 SDL_RWops *rw; | |
680 | |
681 BAIL_IF_MACRO(!initialized, ERR_NOT_INITIALIZED, NULL); | |
682 BAIL_IF_MACRO(filename == NULL, ERR_INVALID_ARGUMENT, NULL); | |
683 | |
684 ext = strrchr(filename, '.'); | |
685 rw = SDL_RWFromFile(filename, "rb"); | |
686 BAIL_IF_MACRO(rw == NULL, SDL_GetError(), NULL); | |
687 | |
688 if (ext != NULL) | |
689 ext++; | |
690 | |
691 return(Sound_NewSample(rw, ext, desired, bufferSize)); | |
692 } /* Sound_NewSampleFromFile */ | |
693 | |
694 | |
695 void Sound_FreeSample(Sound_Sample *sample) | |
696 { | |
697 Sound_SampleInternal *internal; | |
698 | |
699 if (!initialized) | |
700 { | |
387
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701 __Sound_SetError(ERR_NOT_INITIALIZED); |
4 | 702 return; |
703 } /* if */ | |
704 | |
705 if (sample == NULL) | |
706 { | |
387
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707 __Sound_SetError(ERR_INVALID_ARGUMENT); |
4 | 708 return; |
709 } /* if */ | |
710 | |
711 internal = (Sound_SampleInternal *) sample->opaque; | |
712 | |
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713 SDL_LockMutex(samplelist_mutex); |
4 | 714 |
237
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715 /* update the sample_list... */ |
4 | 716 if (internal->prev != NULL) |
717 { | |
718 Sound_SampleInternal *prevInternal; | |
719 prevInternal = (Sound_SampleInternal *) internal->prev->opaque; | |
720 prevInternal->next = internal->next; | |
721 } /* if */ | |
722 else | |
723 { | |
237
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724 assert(sample_list == sample); |
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725 sample_list = internal->next; |
4 | 726 } /* else */ |
727 | |
728 if (internal->next != NULL) | |
729 { | |
730 Sound_SampleInternal *nextInternal; | |
731 nextInternal = (Sound_SampleInternal *) internal->next->opaque; | |
732 nextInternal->prev = internal->prev; | |
733 } /* if */ | |
734 | |
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735 SDL_UnlockMutex(samplelist_mutex); |
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736 |
4 | 737 /* nuke it... */ |
237
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738 internal->funcs->close(sample); |
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739 |
4 | 740 if (internal->rw != NULL) /* this condition is a "just in case" thing. */ |
741 SDL_RWclose(internal->rw); | |
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742 |
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743 if ((internal->buffer != NULL) && (internal->buffer != sample->buffer)) |
4 | 744 free(internal->buffer); |
167
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745 |
4 | 746 free(internal); |
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747 |
4 | 748 if (sample->buffer != NULL) |
749 free(sample->buffer); | |
167
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750 |
4 | 751 free(sample); |
752 } /* Sound_FreeSample */ | |
753 | |
754 | |
755 int Sound_SetBufferSize(Sound_Sample *sample, Uint32 newSize) | |
756 { | |
757 void *newBuf = NULL; | |
758 Sound_SampleInternal *internal = NULL; | |
759 | |
760 BAIL_IF_MACRO(!initialized, ERR_NOT_INITIALIZED, 0); | |
761 BAIL_IF_MACRO(sample == NULL, ERR_INVALID_ARGUMENT, 0); | |
762 internal = ((Sound_SampleInternal *) sample->opaque); | |
763 newBuf = realloc(sample->buffer, newSize * internal->sdlcvt.len_mult); | |
764 BAIL_IF_MACRO(newBuf == NULL, ERR_OUT_OF_MEMORY, 0); | |
765 | |
766 internal->sdlcvt.buf = internal->buffer = sample->buffer = newBuf; | |
767 sample->buffer_size = newSize; | |
768 internal->buffer_size = newSize / internal->sdlcvt.len_mult; | |
769 internal->sdlcvt.len = internal->buffer_size; | |
770 | |
771 return(1); | |
772 } /* Sound_SetBufferSize */ | |
773 | |
774 | |
775 Uint32 Sound_Decode(Sound_Sample *sample) | |
776 { | |
777 Sound_SampleInternal *internal = NULL; | |
778 Uint32 retval = 0; | |
779 | |
780 /* a boatload of sanity checks... */ | |
781 BAIL_IF_MACRO(!initialized, ERR_NOT_INITIALIZED, 0); | |
782 BAIL_IF_MACRO(sample == NULL, ERR_INVALID_ARGUMENT, 0); | |
783 BAIL_IF_MACRO(sample->flags & SOUND_SAMPLEFLAG_ERROR, ERR_PREV_ERROR, 0); | |
784 BAIL_IF_MACRO(sample->flags & SOUND_SAMPLEFLAG_EOF, ERR_PREV_EOF, 0); | |
785 | |
786 internal = (Sound_SampleInternal *) sample->opaque; | |
787 | |
788 assert(sample->buffer != NULL); | |
789 assert(sample->buffer_size > 0); | |
790 assert(internal->buffer != NULL); | |
791 assert(internal->buffer_size > 0); | |
792 | |
793 /* reset EAGAIN. Decoder can flip it back on if it needs to. */ | |
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794 sample->flags &= ~SOUND_SAMPLEFLAG_EAGAIN; |
4 | 795 retval = internal->funcs->read(sample); |
37
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796 |
163
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797 if (retval > 0 && internal->sdlcvt.needed) |
4 | 798 { |
799 internal->sdlcvt.len = retval; | |
143
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800 Sound_ConvertAudio(&internal->sdlcvt); |
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801 retval = internal->sdlcvt.len_cvt; |
4 | 802 } /* if */ |
803 | |
804 return(retval); | |
805 } /* Sound_Decode */ | |
806 | |
807 | |
808 Uint32 Sound_DecodeAll(Sound_Sample *sample) | |
809 { | |
810 Sound_SampleInternal *internal = NULL; | |
811 void *buf = NULL; | |
812 Uint32 newBufSize = 0; | |
813 | |
814 BAIL_IF_MACRO(!initialized, ERR_NOT_INITIALIZED, 0); | |
172
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815 BAIL_IF_MACRO(sample->flags & SOUND_SAMPLEFLAG_EOF, ERR_PREV_EOF, 0); |
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816 BAIL_IF_MACRO(sample->flags & SOUND_SAMPLEFLAG_ERROR, ERR_PREV_ERROR, 0); |
4 | 817 |
818 internal = (Sound_SampleInternal *) sample->opaque; | |
819 | |
820 while ( ((sample->flags & SOUND_SAMPLEFLAG_EOF) == 0) && | |
821 ((sample->flags & SOUND_SAMPLEFLAG_ERROR) == 0) ) | |
822 { | |
172
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823 Uint32 br = Sound_Decode(sample); |
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824 void *ptr = realloc(buf, newBufSize + br); |
4 | 825 if (ptr == NULL) |
826 { | |
827 sample->flags |= SOUND_SAMPLEFLAG_ERROR; | |
387
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828 __Sound_SetError(ERR_OUT_OF_MEMORY); |
4 | 829 } /* if */ |
830 else | |
831 { | |
167
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832 buf = ptr; |
4 | 833 memcpy( ((char *) buf) + newBufSize, sample->buffer, br ); |
834 newBufSize += br; | |
835 } /* else */ | |
836 } /* while */ | |
837 | |
172
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838 if (buf == NULL) /* ...in case first call to realloc() fails... */ |
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839 return(sample->buffer_size); |
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840 |
167
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841 if (internal->buffer != sample->buffer) |
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842 free(internal->buffer); |
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843 |
4 | 844 free(sample->buffer); |
167
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845 |
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846 internal->sdlcvt.buf = internal->buffer = sample->buffer = buf; |
4 | 847 sample->buffer_size = newBufSize; |
848 internal->buffer_size = newBufSize / internal->sdlcvt.len_mult; | |
167
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849 internal->sdlcvt.len = internal->buffer_size; |
4 | 850 |
851 return(newBufSize); | |
852 } /* Sound_DecodeAll */ | |
853 | |
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854 |
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855 int Sound_Rewind(Sound_Sample *sample) |
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856 { |
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857 Sound_SampleInternal *internal; |
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858 BAIL_IF_MACRO(!initialized, ERR_NOT_INITIALIZED, 0); |
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859 |
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860 internal = (Sound_SampleInternal *) sample->opaque; |
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861 if (!internal->funcs->rewind(sample)) |
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862 { |
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863 sample->flags |= SOUND_SAMPLEFLAG_ERROR; |
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864 return(0); |
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865 } /* if */ |
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866 |
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867 sample->flags &= ~SOUND_SAMPLEFLAG_EAGAIN; |
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868 sample->flags &= ~SOUND_SAMPLEFLAG_ERROR; |
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869 sample->flags &= ~SOUND_SAMPLEFLAG_EOF; |
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870 |
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871 return(1); |
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872 } /* Sound_Rewind */ |
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873 |
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874 |
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875 int Sound_Seek(Sound_Sample *sample, Uint32 ms) |
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876 { |
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877 Sound_SampleInternal *internal; |
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878 |
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879 BAIL_IF_MACRO(!initialized, ERR_NOT_INITIALIZED, 0); |
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880 if (!(sample->flags & SOUND_SAMPLEFLAG_CANSEEK)) |
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881 BAIL_MACRO(ERR_CANNOT_SEEK, 0); |
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882 |
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883 internal = (Sound_SampleInternal *) sample->opaque; |
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884 BAIL_IF_MACRO(!internal->funcs->seek(sample, ms), NULL, 0); |
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885 |
311
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886 sample->flags &= ~SOUND_SAMPLEFLAG_EAGAIN; |
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887 sample->flags &= ~SOUND_SAMPLEFLAG_ERROR; |
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888 sample->flags &= ~SOUND_SAMPLEFLAG_EOF; |
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889 |
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890 return(1); |
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891 } /* Sound_Rewind */ |
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892 |
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893 |
4 | 894 /* end of SDL_sound.c ... */ |
895 |