Mercurial > SDL_sound_CoreAudio
annotate SDL_sound.c @ 255:fedfb7975219
Updated.
author | Ryan C. Gordon <icculus@icculus.org> |
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date | Mon, 11 Feb 2002 07:04:17 +0000 |
parents | ceadd952319a |
children | 6fe6de401b63 |
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 | |
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50 #if (defined SOUND_SUPPORTS_MP3) |
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51 extern const Sound_DecoderFunctions __Sound_DecoderFunctions_MP3; |
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52 #endif |
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53 |
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54 #if (defined SOUND_SUPPORTS_MIKMOD) |
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55 extern const Sound_DecoderFunctions __Sound_DecoderFunctions_MIKMOD; |
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56 #endif |
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57 |
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58 #if (defined SOUND_SUPPORTS_MODPLUG) |
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59 extern const Sound_DecoderFunctions __Sound_DecoderFunctions_MODPLUG; |
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60 #endif |
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61 |
20 | 62 #if (defined SOUND_SUPPORTS_WAV) |
63 extern const Sound_DecoderFunctions __Sound_DecoderFunctions_WAV; | |
64 #endif | |
65 | |
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66 #if (defined SOUND_SUPPORTS_AIFF) |
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67 extern const Sound_DecoderFunctions __Sound_DecoderFunctions_AIFF; |
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68 #endif |
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69 |
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70 #if (defined SOUND_SUPPORTS_AU) |
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71 extern const Sound_DecoderFunctions __Sound_DecoderFunctions_AU; |
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72 #endif |
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73 |
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74 #if (defined SOUND_SUPPORTS_OGG) |
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75 extern const Sound_DecoderFunctions __Sound_DecoderFunctions_OGG; |
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76 #endif |
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77 |
4 | 78 #if (defined SOUND_SUPPORTS_VOC) |
79 extern const Sound_DecoderFunctions __Sound_DecoderFunctions_VOC; | |
80 #endif | |
81 | |
82 #if (defined SOUND_SUPPORTS_RAW) | |
83 extern const Sound_DecoderFunctions __Sound_DecoderFunctions_RAW; | |
84 #endif | |
85 | |
102 | 86 #if (defined SOUND_SUPPORTS_SHN) |
87 extern const Sound_DecoderFunctions __Sound_DecoderFunctions_SHN; | |
88 #endif | |
89 | |
110 | 90 #if (defined SOUND_SUPPORTS_MIDI) |
91 extern const Sound_DecoderFunctions __Sound_DecoderFunctions_MIDI; | |
92 #endif | |
93 | |
157 | 94 #if (defined SOUND_SUPPORTS_FLAC) |
95 extern const Sound_DecoderFunctions __Sound_DecoderFunctions_FLAC; | |
96 #endif | |
97 | |
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98 |
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99 |
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100 typedef struct |
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101 { |
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102 int available; |
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103 const Sound_DecoderFunctions *funcs; |
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104 } decoder_element; |
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105 |
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106 static decoder_element decoders[] = |
4 | 107 { |
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108 #if (defined SOUND_SUPPORTS_MP3) |
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109 { 0, &__Sound_DecoderFunctions_MP3 }, |
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110 #endif |
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111 |
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112 #if (defined SOUND_SUPPORTS_MODPLUG) |
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113 { 0, &__Sound_DecoderFunctions_MODPLUG }, |
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114 #endif |
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115 |
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116 #if (defined SOUND_SUPPORTS_MIKMOD) |
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117 { 0, &__Sound_DecoderFunctions_MIKMOD }, |
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118 #endif |
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119 |
20 | 120 #if (defined SOUND_SUPPORTS_WAV) |
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121 { 0, &__Sound_DecoderFunctions_WAV }, |
20 | 122 #endif |
123 | |
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124 #if (defined SOUND_SUPPORTS_AIFF) |
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125 { 0, &__Sound_DecoderFunctions_AIFF }, |
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126 #endif |
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127 |
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128 #if (defined SOUND_SUPPORTS_AU) |
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129 { 0, &__Sound_DecoderFunctions_AU }, |
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130 #endif |
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131 |
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132 #if (defined SOUND_SUPPORTS_OGG) |
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133 { 0, &__Sound_DecoderFunctions_OGG }, |
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134 #endif |
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135 |
4 | 136 #if (defined SOUND_SUPPORTS_VOC) |
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137 { 0, &__Sound_DecoderFunctions_VOC }, |
4 | 138 #endif |
139 | |
140 #if (defined SOUND_SUPPORTS_RAW) | |
48
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141 { 0, &__Sound_DecoderFunctions_RAW }, |
4 | 142 #endif |
102 | 143 |
144 #if (defined SOUND_SUPPORTS_SHN) | |
145 { 0, &__Sound_DecoderFunctions_SHN }, | |
146 #endif | |
110 | 147 |
163
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148 #if (defined SOUND_SUPPORTS_FLAC) |
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149 { 0, &__Sound_DecoderFunctions_FLAC }, |
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150 #endif |
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151 |
110 | 152 #if (defined SOUND_SUPPORTS_MIDI) |
153 { 0, &__Sound_DecoderFunctions_MIDI }, | |
154 #endif | |
118
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155 |
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156 { 0, NULL } |
4 | 157 }; |
158 | |
159 | |
160 | |
161 /* General SDL_sound state ... */ | |
162 | |
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163 typedef struct __SOUND_ERRMSGTYPE__ |
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164 { |
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165 Uint32 tid; |
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166 int error_available; |
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167 char error_string[128]; |
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168 struct __SOUND_ERRMSGTYPE__ *next; |
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169 } ErrMsg; |
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170 |
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171 static ErrMsg *error_msgs = NULL; |
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172 static SDL_mutex *errorlist_mutex = NULL; |
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173 |
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174 static Sound_Sample *sample_list = NULL; /* this is a linked list. */ |
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175 static SDL_mutex *samplelist_mutex = NULL; |
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176 |
4 | 177 static const Sound_DecoderInfo **available_decoders = NULL; |
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178 static int initialized = 0; |
4 | 179 |
180 | |
181 /* functions ... */ | |
182 | |
183 void Sound_GetLinkedVersion(Sound_Version *ver) | |
184 { | |
185 if (ver != NULL) | |
186 { | |
187 ver->major = SOUND_VER_MAJOR; | |
188 ver->minor = SOUND_VER_MINOR; | |
189 ver->patch = SOUND_VER_PATCH; | |
190 } /* if */ | |
191 } /* Sound_GetLinkedVersion */ | |
192 | |
193 | |
194 int Sound_Init(void) | |
195 { | |
196 size_t i; | |
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197 size_t pos = 0; |
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198 size_t total = sizeof (decoders) / sizeof (decoders[0]); |
4 | 199 BAIL_IF_MACRO(initialized, ERR_IS_INITIALIZED, 0); |
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200 |
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201 sample_list = NULL; |
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202 error_msgs = NULL; |
4 | 203 |
204 available_decoders = (const Sound_DecoderInfo **) | |
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205 malloc((total) * sizeof (Sound_DecoderInfo *)); |
4 | 206 BAIL_IF_MACRO(available_decoders == NULL, ERR_OUT_OF_MEMORY, 0); |
207 | |
226
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208 SDL_Init(SDL_INIT_AUDIO); |
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209 |
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210 errorlist_mutex = SDL_CreateMutex(); |
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211 |
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212 for (i = 0; decoders[i].funcs != NULL; i++) |
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213 { |
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214 decoders[i].available = decoders[i].funcs->init(); |
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215 if (decoders[i].available) |
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216 { |
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217 available_decoders[pos] = &(decoders[i].funcs->info); |
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218 pos++; |
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219 } /* if */ |
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220 } /* for */ |
4 | 221 |
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222 available_decoders[pos] = NULL; |
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223 |
4 | 224 initialized = 1; |
225 return(1); | |
226 } /* Sound_Init */ | |
227 | |
228 | |
229 int Sound_Quit(void) | |
230 { | |
219
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231 ErrMsg *err; |
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232 ErrMsg *nexterr = NULL; |
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233 size_t i; |
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234 |
4 | 235 BAIL_IF_MACRO(!initialized, ERR_NOT_INITIALIZED, 0); |
236 | |
237
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237 while (((volatile Sound_Sample *) sample_list) != NULL) |
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238 Sound_FreeSample(sample_list); |
4 | 239 |
237
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240 initialized = 0; |
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241 |
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242 SDL_DestroyMutex(samplelist_mutex); |
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243 samplelist_mutex = NULL; |
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244 sample_list = NULL; |
219
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245 |
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246 for (i = 0; decoders[i].funcs != NULL; i++) |
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247 { |
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248 if (decoders[i].available) |
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249 { |
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250 decoders[i].funcs->quit(); |
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251 decoders[i].available = 0; |
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252 } /* if */ |
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253 } /* for */ |
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254 |
4 | 255 if (available_decoders != NULL) |
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256 free((void *) available_decoders); |
4 | 257 available_decoders = NULL; |
258 | |
219
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259 /* clean up error state for each thread... */ |
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260 SDL_LockMutex(errorlist_mutex); |
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261 for (err = error_msgs; err != NULL; err = nexterr) |
219
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262 { |
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263 nexterr = err->next; |
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264 free(err); |
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265 } /* for */ |
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266 error_msgs = NULL; |
219
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267 SDL_UnlockMutex(errorlist_mutex); |
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268 SDL_DestroyMutex(errorlist_mutex); |
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269 errorlist_mutex = NULL; |
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270 |
4 | 271 return(1); |
272 } /* Sound_Quit */ | |
273 | |
274 | |
275 const Sound_DecoderInfo **Sound_AvailableDecoders(void) | |
276 { | |
277 return(available_decoders); /* READ. ONLY. */ | |
278 } /* Sound_AvailableDecoders */ | |
279 | |
280 | |
219
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281 static ErrMsg *findErrorForCurrentThread(void) |
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282 { |
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283 ErrMsg *i; |
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284 Uint32 tid; |
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285 |
237
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286 if (error_msgs != NULL) |
219
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287 { |
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288 tid = SDL_ThreadID(); |
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289 |
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290 SDL_LockMutex(errorlist_mutex); |
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291 for (i = error_msgs; i != NULL; i = i->next) |
219
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292 { |
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293 if (i->tid == tid) |
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294 { |
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295 SDL_UnlockMutex(errorlist_mutex); |
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296 return(i); |
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297 } /* if */ |
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298 } /* for */ |
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299 SDL_UnlockMutex(errorlist_mutex); |
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300 } /* if */ |
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301 |
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302 return(NULL); /* no error available. */ |
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303 } /* findErrorForCurrentThread */ |
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304 |
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305 |
4 | 306 const char *Sound_GetError(void) |
307 { | |
219
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308 const char *retval = NULL; |
226
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309 ErrMsg *err; |
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310 |
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311 if (!initialized) |
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312 return(ERR_NOT_INITIALIZED); |
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313 |
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314 err = findErrorForCurrentThread(); |
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315 if ((err != NULL) && (err->error_available)) |
219
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316 { |
237
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317 retval = err->error_string; |
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318 err->error_available = 0; |
219
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319 } /* if */ |
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320 |
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321 return(retval); |
4 | 322 } /* Sound_GetError */ |
323 | |
324 | |
325 void Sound_ClearError(void) | |
326 { | |
226
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327 ErrMsg *err; |
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328 |
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329 if (!initialized) |
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330 return; |
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331 |
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332 err = findErrorForCurrentThread(); |
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333 if (err != NULL) |
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334 err->error_available = 0; |
4 | 335 } /* Sound_ClearError */ |
336 | |
337 | |
338 /* | |
339 * This is declared in the internal header. | |
340 */ | |
219
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341 void Sound_SetError(const char *str) |
4 | 342 { |
219
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343 ErrMsg *err; |
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344 |
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345 if (str == NULL) |
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346 return; |
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347 |
226
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348 SNDDBG(("Sound_SetError(\"%s\");%s\n", str, |
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349 (initialized) ? "" : " [NOT INITIALIZED!]")); |
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350 |
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351 if (!initialized) |
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352 return; |
219
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353 |
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354 err = findErrorForCurrentThread(); |
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355 if (err == NULL) |
165
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356 { |
219
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357 err = (ErrMsg *) malloc(sizeof (ErrMsg)); |
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358 if (err == NULL) |
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359 return; /* uhh...? */ |
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360 |
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361 memset((void *) err, '\0', sizeof (ErrMsg)); |
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362 err->tid = SDL_ThreadID(); |
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363 |
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364 SDL_LockMutex(errorlist_mutex); |
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365 err->next = error_msgs; |
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366 error_msgs = err; |
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367 SDL_UnlockMutex(errorlist_mutex); |
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368 } /* if */ |
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369 |
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370 err->error_available = 1; |
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371 strncpy(err->error_string, str, sizeof (err->error_string)); |
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372 err->error_string[sizeof (err->error_string) - 1] = '\0'; |
4 | 373 } /* Sound_SetError */ |
374 | |
375 | |
376 /* | |
377 * -ansi and -pedantic flags prevent use of strcasecmp() on Linux, and | |
378 * I honestly don't want to mess around with figuring out if a given | |
379 * platform has "strcasecmp", "stricmp", or | |
380 * "compare_two_damned_strings_case_insensitive", which I hear is in the | |
381 * next release of Carbon. :) This is exported so decoders may use it if | |
382 * they like. | |
383 */ | |
384 int __Sound_strcasecmp(const char *x, const char *y) | |
385 { | |
386 int ux, uy; | |
387 | |
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388 if (x == y) /* same pointer? Both NULL? */ |
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389 return(0); |
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390 |
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391 if (x == NULL) |
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392 return(-1); |
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393 |
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394 if (y == NULL) |
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395 return(1); |
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396 |
4 | 397 do |
398 { | |
399 ux = toupper((int) *x); | |
400 uy = toupper((int) *y); | |
401 if (ux > uy) | |
402 return(1); | |
403 else if (ux < uy) | |
404 return(-1); | |
405 x++; | |
406 y++; | |
407 } while ((ux) && (uy)); | |
408 | |
409 return(0); | |
410 } /* __Sound_strcasecmp */ | |
411 | |
412 | |
413 /* | |
414 * Allocate a Sound_Sample, and fill in most of its fields. Those that need | |
415 * to be filled in later, by a decoder, will be initialized to zero. | |
416 */ | |
417 static Sound_Sample *alloc_sample(SDL_RWops *rw, Sound_AudioInfo *desired, | |
418 Uint32 bufferSize) | |
419 { | |
420 Sound_Sample *retval = malloc(sizeof (Sound_Sample)); | |
421 Sound_SampleInternal *internal = malloc(sizeof (Sound_SampleInternal)); | |
422 if ((retval == NULL) || (internal == NULL)) | |
423 { | |
424 Sound_SetError(ERR_OUT_OF_MEMORY); | |
425 if (retval) | |
426 free(retval); | |
427 if (internal) | |
428 free(internal); | |
429 | |
430 return(NULL); | |
431 } /* if */ | |
432 | |
433 memset(retval, '\0', sizeof (Sound_Sample)); | |
434 memset(internal, '\0', sizeof (Sound_SampleInternal)); | |
435 | |
436 assert(bufferSize > 0); | |
437 retval->buffer = malloc(bufferSize); /* pure ugly. */ | |
438 if (!retval->buffer) | |
439 { | |
440 Sound_SetError(ERR_OUT_OF_MEMORY); | |
441 free(internal); | |
442 free(retval); | |
443 return(NULL); | |
444 } /* if */ | |
445 memset(retval->buffer, '\0', bufferSize); | |
446 retval->buffer_size = bufferSize; | |
447 | |
448 if (desired != NULL) | |
449 memcpy(&retval->desired, desired, sizeof (Sound_AudioInfo)); | |
450 | |
451 internal->rw = rw; | |
452 retval->opaque = internal; | |
453 return(retval); | |
454 } /* alloc_sample */ | |
455 | |
456 | |
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457 #if (defined DEBUG_CHATTER) |
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458 static __inline__ const char *fmt_to_str(Uint16 fmt) |
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459 { |
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460 switch(fmt) |
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461 { |
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462 case AUDIO_U8: |
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463 return("U8"); |
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464 case AUDIO_S8: |
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465 return("S8"); |
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466 case AUDIO_U16LSB: |
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467 return("U16LSB"); |
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468 case AUDIO_S16LSB: |
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469 return("S16LSB"); |
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470 case AUDIO_U16MSB: |
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471 return("U16MSB"); |
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472 case AUDIO_S16MSB: |
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473 return("S16MSB"); |
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474 } /* switch */ |
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475 |
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476 return("Unknown"); |
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477 } /* fmt_to_str */ |
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478 #endif |
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479 |
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480 |
4 | 481 /* |
482 * The bulk of the Sound_NewSample() work is done here... | |
483 * Ask the specified decoder to handle the data in (rw), and if | |
484 * so, construct the Sound_Sample. Otherwise, try to wind (rw)'s stream | |
485 * back to where it was, and return false. | |
486 * | |
487 * !!! FIXME: This is big, ugly, nasty, and smelly. | |
488 */ | |
489 static int init_sample(const Sound_DecoderFunctions *funcs, | |
490 Sound_Sample *sample, const char *ext, | |
491 Sound_AudioInfo *_desired) | |
492 { | |
493 Sound_SampleInternal *internal = (Sound_SampleInternal *) sample->opaque; | |
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494 Sound_AudioInfo desired; |
4 | 495 int pos = SDL_RWtell(internal->rw); /* !!! FIXME: Int? Really? */ |
496 | |
497 /* fill in the funcs for this decoder... */ | |
498 sample->decoder = &funcs->info; | |
499 internal->funcs = funcs; | |
500 if (!funcs->open(sample, ext)) | |
501 { | |
502 SDL_RWseek(internal->rw, pos, SEEK_SET); /* set for next try... */ | |
503 return(0); | |
504 } /* if */ | |
505 | |
506 /* success; we've got a decoder! */ | |
507 | |
508 /* Now we need to set up the conversion buffer... */ | |
509 | |
510 memcpy(&desired, (_desired != NULL) ? _desired : &sample->actual, | |
511 sizeof (Sound_AudioInfo)); | |
512 | |
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513 if (Sound_BuildAudioCVT(&internal->sdlcvt, |
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514 sample->actual.format, |
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515 sample->actual.channels, |
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516 sample->actual.rate, |
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517 desired.format, |
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518 desired.channels, |
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519 desired.rate) == -1) |
4 | 520 { |
521 Sound_SetError(SDL_GetError()); | |
522 funcs->close(sample); | |
523 SDL_RWseek(internal->rw, pos, SEEK_SET); /* set for next try... */ | |
524 return(0); | |
525 } /* if */ | |
526 | |
527 if (internal->sdlcvt.len_mult > 1) | |
528 { | |
529 void *rc = realloc(sample->buffer, | |
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530 sample->buffer_size * internal->sdlcvt.len_mult); |
4 | 531 if (rc == NULL) |
532 { | |
533 funcs->close(sample); | |
534 SDL_RWseek(internal->rw, pos, SEEK_SET); /* set for next try... */ | |
535 return(0); | |
536 } /* if */ | |
537 | |
538 sample->buffer = rc; | |
539 } /* if */ | |
540 | |
541 /* these pointers are all one and the same. */ | |
542 memcpy(&sample->desired, &desired, sizeof (Sound_AudioInfo)); | |
543 internal->sdlcvt.buf = internal->buffer = sample->buffer; | |
544 internal->buffer_size = sample->buffer_size / internal->sdlcvt.len_mult; | |
545 internal->sdlcvt.len = internal->buffer_size; | |
546 | |
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547 /* Prepend our new Sound_Sample to the sample_list... */ |
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548 SDL_LockMutex(samplelist_mutex); |
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549 internal->next = sample_list; |
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550 if (sample_list != NULL) |
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551 ((Sound_SampleInternal *) sample_list->opaque)->prev = sample; |
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552 sample_list = sample; |
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553 SDL_UnlockMutex(samplelist_mutex); |
4 | 554 |
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555 SNDDBG(("New sample DESIRED format: %s format, %d rate, %d channels.\n", |
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556 fmt_to_str(sample->desired.format), |
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557 sample->desired.rate, |
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558 sample->desired.channels)); |
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559 |
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560 SNDDBG(("New sample ACTUAL format: %s format, %d rate, %d channels.\n", |
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561 fmt_to_str(sample->actual.format), |
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562 sample->actual.rate, |
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563 sample->actual.channels)); |
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564 |
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565 SNDDBG(("On-the-fly conversion: %s.\n", |
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566 internal->sdlcvt.needed ? "ENABLED" : "DISABLED")); |
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567 |
4 | 568 return(1); |
569 } /* init_sample */ | |
570 | |
571 | |
572 Sound_Sample *Sound_NewSample(SDL_RWops *rw, const char *ext, | |
573 Sound_AudioInfo *desired, Uint32 bSize) | |
574 { | |
575 Sound_Sample *retval; | |
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576 decoder_element *decoder; |
4 | 577 |
578 /* sanity checks. */ | |
579 BAIL_IF_MACRO(!initialized, ERR_NOT_INITIALIZED, NULL); | |
580 BAIL_IF_MACRO(rw == NULL, ERR_INVALID_ARGUMENT, NULL); | |
581 | |
582 retval = alloc_sample(rw, desired, bSize); | |
583 if (!retval) | |
584 return(NULL); /* alloc_sample() sets error message... */ | |
585 | |
586 if (ext != NULL) | |
587 { | |
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588 for (decoder = &decoders[0]; decoder->funcs != NULL; decoder++) |
4 | 589 { |
149
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590 if (decoder->available) |
4 | 591 { |
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592 const char **decoderExt = decoder->funcs->info.extensions; |
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593 while (*decoderExt) |
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594 { |
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595 if (__Sound_strcasecmp(*decoderExt, ext) == 0) |
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596 { |
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597 if (init_sample(decoder->funcs, retval, ext, desired)) |
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598 return(retval); |
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599 break; /* done with this decoder either way. */ |
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600 } /* if */ |
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601 decoderExt++; |
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602 } /* while */ |
4 | 603 } /* if */ |
604 } /* for */ | |
605 } /* if */ | |
606 | |
607 /* no direct extension match? Try everything we've got... */ | |
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608 for (decoder = &decoders[0]; decoder->funcs != NULL; decoder++) |
4 | 609 { |
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610 if (decoder->available) |
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611 { |
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612 int should_try = 1; |
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613 const char **decoderExt = decoder->funcs->info.extensions; |
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614 |
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615 /* skip if we would have tried decoder above... */ |
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616 while (*decoderExt) |
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617 { |
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618 if (__Sound_strcasecmp(*decoderExt, ext) == 0) |
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619 { |
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620 should_try = 0; |
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621 break; |
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622 } /* if */ |
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623 decoderExt++; |
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624 } /* while */ |
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625 |
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626 if (should_try) |
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627 { |
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628 if (init_sample(decoder->funcs, retval, ext, desired)) |
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629 return(retval); |
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630 } /* if */ |
48
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631 } /* if */ |
4 | 632 } /* for */ |
633 | |
634 /* nothing could handle the sound data... */ | |
635 free(retval->opaque); | |
636 if (retval->buffer != NULL) | |
637 free(retval->buffer); | |
638 free(retval); | |
639 SDL_RWclose(rw); | |
640 Sound_SetError(ERR_UNSUPPORTED_FORMAT); | |
641 return(NULL); | |
642 } /* Sound_NewSample */ | |
643 | |
644 | |
645 Sound_Sample *Sound_NewSampleFromFile(const char *filename, | |
646 Sound_AudioInfo *desired, | |
647 Uint32 bufferSize) | |
648 { | |
649 const char *ext; | |
650 SDL_RWops *rw; | |
651 | |
652 BAIL_IF_MACRO(!initialized, ERR_NOT_INITIALIZED, NULL); | |
653 BAIL_IF_MACRO(filename == NULL, ERR_INVALID_ARGUMENT, NULL); | |
654 | |
655 ext = strrchr(filename, '.'); | |
656 rw = SDL_RWFromFile(filename, "rb"); | |
657 BAIL_IF_MACRO(rw == NULL, SDL_GetError(), NULL); | |
658 | |
659 if (ext != NULL) | |
660 ext++; | |
661 | |
662 return(Sound_NewSample(rw, ext, desired, bufferSize)); | |
663 } /* Sound_NewSampleFromFile */ | |
664 | |
665 | |
666 void Sound_FreeSample(Sound_Sample *sample) | |
667 { | |
668 Sound_SampleInternal *internal; | |
669 | |
670 if (!initialized) | |
671 { | |
672 Sound_SetError(ERR_NOT_INITIALIZED); | |
673 return; | |
674 } /* if */ | |
675 | |
676 if (sample == NULL) | |
677 { | |
678 Sound_SetError(ERR_INVALID_ARGUMENT); | |
679 return; | |
680 } /* if */ | |
681 | |
682 internal = (Sound_SampleInternal *) sample->opaque; | |
683 | |
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684 SDL_LockMutex(samplelist_mutex); |
4 | 685 |
237
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686 /* update the sample_list... */ |
4 | 687 if (internal->prev != NULL) |
688 { | |
689 Sound_SampleInternal *prevInternal; | |
690 prevInternal = (Sound_SampleInternal *) internal->prev->opaque; | |
691 prevInternal->next = internal->next; | |
692 } /* if */ | |
693 else | |
694 { | |
237
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695 assert(sample_list == sample); |
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696 sample_list = internal->next; |
4 | 697 } /* else */ |
698 | |
699 if (internal->next != NULL) | |
700 { | |
701 Sound_SampleInternal *nextInternal; | |
702 nextInternal = (Sound_SampleInternal *) internal->next->opaque; | |
703 nextInternal->prev = internal->prev; | |
704 } /* if */ | |
705 | |
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706 SDL_UnlockMutex(samplelist_mutex); |
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707 |
4 | 708 /* nuke it... */ |
237
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709 internal->funcs->close(sample); |
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710 |
4 | 711 if (internal->rw != NULL) /* this condition is a "just in case" thing. */ |
712 SDL_RWclose(internal->rw); | |
167
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713 |
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714 if ((internal->buffer != NULL) && (internal->buffer != sample->buffer)) |
4 | 715 free(internal->buffer); |
167
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716 |
4 | 717 free(internal); |
167
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718 |
4 | 719 if (sample->buffer != NULL) |
720 free(sample->buffer); | |
167
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721 |
4 | 722 free(sample); |
723 } /* Sound_FreeSample */ | |
724 | |
725 | |
726 int Sound_SetBufferSize(Sound_Sample *sample, Uint32 newSize) | |
727 { | |
728 void *newBuf = NULL; | |
729 Sound_SampleInternal *internal = NULL; | |
730 | |
731 BAIL_IF_MACRO(!initialized, ERR_NOT_INITIALIZED, 0); | |
732 BAIL_IF_MACRO(sample == NULL, ERR_INVALID_ARGUMENT, 0); | |
733 internal = ((Sound_SampleInternal *) sample->opaque); | |
734 newBuf = realloc(sample->buffer, newSize * internal->sdlcvt.len_mult); | |
735 BAIL_IF_MACRO(newBuf == NULL, ERR_OUT_OF_MEMORY, 0); | |
736 | |
737 internal->sdlcvt.buf = internal->buffer = sample->buffer = newBuf; | |
738 sample->buffer_size = newSize; | |
739 internal->buffer_size = newSize / internal->sdlcvt.len_mult; | |
740 internal->sdlcvt.len = internal->buffer_size; | |
741 | |
742 return(1); | |
743 } /* Sound_SetBufferSize */ | |
744 | |
745 | |
746 Uint32 Sound_Decode(Sound_Sample *sample) | |
747 { | |
748 Sound_SampleInternal *internal = NULL; | |
749 Uint32 retval = 0; | |
750 | |
751 /* a boatload of sanity checks... */ | |
752 BAIL_IF_MACRO(!initialized, ERR_NOT_INITIALIZED, 0); | |
753 BAIL_IF_MACRO(sample == NULL, ERR_INVALID_ARGUMENT, 0); | |
754 BAIL_IF_MACRO(sample->flags & SOUND_SAMPLEFLAG_ERROR, ERR_PREV_ERROR, 0); | |
755 BAIL_IF_MACRO(sample->flags & SOUND_SAMPLEFLAG_EOF, ERR_PREV_EOF, 0); | |
756 | |
757 internal = (Sound_SampleInternal *) sample->opaque; | |
758 | |
759 assert(sample->buffer != NULL); | |
760 assert(sample->buffer_size > 0); | |
761 assert(internal->buffer != NULL); | |
762 assert(internal->buffer_size > 0); | |
763 | |
764 /* reset EAGAIN. Decoder can flip it back on if it needs to. */ | |
765 sample->flags &= !SOUND_SAMPLEFLAG_EAGAIN; | |
766 retval = internal->funcs->read(sample); | |
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767 |
163
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768 if (retval > 0 && internal->sdlcvt.needed) |
4 | 769 { |
770 internal->sdlcvt.len = retval; | |
143
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771 Sound_ConvertAudio(&internal->sdlcvt); |
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772 retval = internal->sdlcvt.len_cvt; |
4 | 773 } /* if */ |
774 | |
775 return(retval); | |
776 } /* Sound_Decode */ | |
777 | |
778 | |
779 Uint32 Sound_DecodeAll(Sound_Sample *sample) | |
780 { | |
781 Sound_SampleInternal *internal = NULL; | |
782 void *buf = NULL; | |
783 Uint32 newBufSize = 0; | |
784 | |
785 BAIL_IF_MACRO(!initialized, ERR_NOT_INITIALIZED, 0); | |
172
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786 BAIL_IF_MACRO(sample->flags & SOUND_SAMPLEFLAG_EOF, ERR_PREV_EOF, 0); |
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787 BAIL_IF_MACRO(sample->flags & SOUND_SAMPLEFLAG_ERROR, ERR_PREV_ERROR, 0); |
4 | 788 |
789 internal = (Sound_SampleInternal *) sample->opaque; | |
790 | |
791 while ( ((sample->flags & SOUND_SAMPLEFLAG_EOF) == 0) && | |
792 ((sample->flags & SOUND_SAMPLEFLAG_ERROR) == 0) ) | |
793 { | |
172
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794 Uint32 br = Sound_Decode(sample); |
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795 void *ptr = realloc(buf, newBufSize + br); |
4 | 796 if (ptr == NULL) |
797 { | |
798 sample->flags |= SOUND_SAMPLEFLAG_ERROR; | |
799 Sound_SetError(ERR_OUT_OF_MEMORY); | |
800 } /* if */ | |
801 else | |
802 { | |
167
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803 buf = ptr; |
4 | 804 memcpy( ((char *) buf) + newBufSize, sample->buffer, br ); |
805 newBufSize += br; | |
806 } /* else */ | |
807 } /* while */ | |
808 | |
172
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809 if (buf == NULL) /* ...in case first call to realloc() fails... */ |
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810 return(sample->buffer_size); |
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811 |
167
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812 if (internal->buffer != sample->buffer) |
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813 free(internal->buffer); |
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814 |
4 | 815 free(sample->buffer); |
167
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816 |
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817 internal->sdlcvt.buf = internal->buffer = sample->buffer = buf; |
4 | 818 sample->buffer_size = newBufSize; |
819 internal->buffer_size = newBufSize / internal->sdlcvt.len_mult; | |
167
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820 internal->sdlcvt.len = internal->buffer_size; |
4 | 821 |
822 return(newBufSize); | |
823 } /* Sound_DecodeAll */ | |
824 | |
223
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825 |
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826 int Sound_Rewind(Sound_Sample *sample) |
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827 { |
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828 Sound_SampleInternal *internal; |
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829 BAIL_IF_MACRO(!initialized, ERR_NOT_INITIALIZED, 0); |
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830 |
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831 internal = (Sound_SampleInternal *) sample->opaque; |
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832 if (!internal->funcs->rewind(sample)) |
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833 { |
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834 sample->flags |= SOUND_SAMPLEFLAG_ERROR; |
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835 return(0); |
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836 } /* if */ |
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837 |
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838 sample->flags &= !SOUND_SAMPLEFLAG_EAGAIN; |
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839 sample->flags &= !SOUND_SAMPLEFLAG_ERROR; |
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840 sample->flags &= !SOUND_SAMPLEFLAG_EOF; |
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841 return(1); |
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842 } /* Sound_Rewind */ |
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843 |
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844 |
4 | 845 /* end of SDL_sound.c ... */ |
846 |