Mercurial > SDL_sound_CoreAudio
annotate SDL_sound.c @ 574:fa4ea28fd997 stable-1.0
Fixed compiler warning.
(transplanted from 3b8748455aff0624acdc50ab1f1857daa27854b3)
| author | Ryan C. Gordon <icculus@icculus.org> |
|---|---|
| date | Sun, 24 Jan 2010 13:29:27 -0500 |
| parents | 3b1d1269e20d |
| children |
| 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 * |
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28 * This file written by Ryan C. Gordon. (icculus@icculus.org) |
| 4 | 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" | |
|
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41 #include "SDL_thread.h" |
| 4 | 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 /* All these externs may be missing; we check SOUND_SUPPORTS_xxx before use. */ |
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51 extern const Sound_DecoderFunctions __Sound_DecoderFunctions_SMPEG; |
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52 extern const Sound_DecoderFunctions __Sound_DecoderFunctions_MPGLIB; |
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53 extern const Sound_DecoderFunctions __Sound_DecoderFunctions_MIKMOD; |
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54 extern const Sound_DecoderFunctions __Sound_DecoderFunctions_MODPLUG; |
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55 extern const Sound_DecoderFunctions __Sound_DecoderFunctions_WAV; |
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56 extern const Sound_DecoderFunctions __Sound_DecoderFunctions_AIFF; |
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57 extern const Sound_DecoderFunctions __Sound_DecoderFunctions_AU; |
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58 extern const Sound_DecoderFunctions __Sound_DecoderFunctions_OGG; |
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59 extern const Sound_DecoderFunctions __Sound_DecoderFunctions_VOC; |
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60 extern const Sound_DecoderFunctions __Sound_DecoderFunctions_RAW; |
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61 extern const Sound_DecoderFunctions __Sound_DecoderFunctions_SHN; |
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62 extern const Sound_DecoderFunctions __Sound_DecoderFunctions_MIDI; |
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63 extern const Sound_DecoderFunctions __Sound_DecoderFunctions_FLAC; |
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64 extern const Sound_DecoderFunctions __Sound_DecoderFunctions_QuickTime; |
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65 extern const Sound_DecoderFunctions __Sound_DecoderFunctions_SPEEX; |
| 450 | 66 |
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67 typedef struct |
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68 { |
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69 int available; |
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70 const Sound_DecoderFunctions *funcs; |
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71 } decoder_element; |
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72 |
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73 static decoder_element decoders[] = |
| 4 | 74 { |
| 262 | 75 #if (defined SOUND_SUPPORTS_SMPEG) |
| 76 { 0, &__Sound_DecoderFunctions_SMPEG }, | |
| 77 #endif | |
| 78 | |
| 79 #if (defined SOUND_SUPPORTS_MPGLIB) | |
| 80 { 0, &__Sound_DecoderFunctions_MPGLIB }, | |
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81 #endif |
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82 |
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83 #if (defined SOUND_SUPPORTS_MODPLUG) |
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84 { 0, &__Sound_DecoderFunctions_MODPLUG }, |
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85 #endif |
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86 |
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87 #if (defined SOUND_SUPPORTS_MIKMOD) |
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88 { 0, &__Sound_DecoderFunctions_MIKMOD }, |
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89 #endif |
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90 |
| 20 | 91 #if (defined SOUND_SUPPORTS_WAV) |
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92 { 0, &__Sound_DecoderFunctions_WAV }, |
| 20 | 93 #endif |
| 94 | |
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95 #if (defined SOUND_SUPPORTS_AIFF) |
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96 { 0, &__Sound_DecoderFunctions_AIFF }, |
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97 #endif |
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98 |
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99 #if (defined SOUND_SUPPORTS_AU) |
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100 { 0, &__Sound_DecoderFunctions_AU }, |
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101 #endif |
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102 |
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103 #if (defined SOUND_SUPPORTS_OGG) |
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104 { 0, &__Sound_DecoderFunctions_OGG }, |
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105 #endif |
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106 |
| 4 | 107 #if (defined SOUND_SUPPORTS_VOC) |
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108 { 0, &__Sound_DecoderFunctions_VOC }, |
| 4 | 109 #endif |
| 110 | |
| 111 #if (defined SOUND_SUPPORTS_RAW) | |
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112 { 0, &__Sound_DecoderFunctions_RAW }, |
| 4 | 113 #endif |
| 102 | 114 |
| 115 #if (defined SOUND_SUPPORTS_SHN) | |
| 116 { 0, &__Sound_DecoderFunctions_SHN }, | |
| 117 #endif | |
| 110 | 118 |
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119 #if (defined SOUND_SUPPORTS_FLAC) |
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120 { 0, &__Sound_DecoderFunctions_FLAC }, |
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121 #endif |
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122 |
| 110 | 123 #if (defined SOUND_SUPPORTS_MIDI) |
| 124 { 0, &__Sound_DecoderFunctions_MIDI }, | |
| 125 #endif | |
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126 |
| 322 | 127 #if (defined SOUND_SUPPORTS_QUICKTIME) |
| 128 { 0, &__Sound_DecoderFunctions_QuickTime }, | |
| 129 #endif | |
| 130 | |
| 450 | 131 #if (defined SOUND_SUPPORTS_SPEEX) |
| 132 { 0, &__Sound_DecoderFunctions_SPEEX }, | |
| 133 #endif | |
| 134 | |
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135 { 0, NULL } |
| 4 | 136 }; |
| 137 | |
| 138 | |
| 139 | |
| 140 /* General SDL_sound state ... */ | |
| 141 | |
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142 typedef struct __SOUND_ERRMSGTYPE__ |
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143 { |
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144 Uint32 tid; |
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145 int error_available; |
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146 char error_string[128]; |
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147 struct __SOUND_ERRMSGTYPE__ *next; |
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148 } ErrMsg; |
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149 |
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150 static ErrMsg *error_msgs = NULL; |
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151 static SDL_mutex *errorlist_mutex = NULL; |
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152 |
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153 static Sound_Sample *sample_list = NULL; /* this is a linked list. */ |
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154 static SDL_mutex *samplelist_mutex = NULL; |
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155 |
| 4 | 156 static const Sound_DecoderInfo **available_decoders = NULL; |
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157 static int initialized = 0; |
| 4 | 158 |
| 159 | |
| 160 /* functions ... */ | |
| 161 | |
| 162 void Sound_GetLinkedVersion(Sound_Version *ver) | |
| 163 { | |
| 164 if (ver != NULL) | |
| 165 { | |
| 166 ver->major = SOUND_VER_MAJOR; | |
| 167 ver->minor = SOUND_VER_MINOR; | |
| 168 ver->patch = SOUND_VER_PATCH; | |
| 169 } /* if */ | |
| 170 } /* Sound_GetLinkedVersion */ | |
| 171 | |
| 172 | |
| 173 int Sound_Init(void) | |
| 174 { | |
| 175 size_t i; | |
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176 size_t pos = 0; |
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177 size_t total = sizeof (decoders) / sizeof (decoders[0]); |
| 4 | 178 BAIL_IF_MACRO(initialized, ERR_IS_INITIALIZED, 0); |
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179 |
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180 sample_list = NULL; |
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181 error_msgs = NULL; |
| 4 | 182 |
| 183 available_decoders = (const Sound_DecoderInfo **) | |
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184 malloc((total) * sizeof (Sound_DecoderInfo *)); |
| 4 | 185 BAIL_IF_MACRO(available_decoders == NULL, ERR_OUT_OF_MEMORY, 0); |
| 186 | |
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187 SDL_InitSubSystem(SDL_INIT_AUDIO); |
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188 |
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189 errorlist_mutex = SDL_CreateMutex(); |
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190 samplelist_mutex = SDL_CreateMutex(); |
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191 |
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192 for (i = 0; decoders[i].funcs != NULL; i++) |
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193 { |
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194 decoders[i].available = decoders[i].funcs->init(); |
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195 if (decoders[i].available) |
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196 { |
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197 available_decoders[pos] = &(decoders[i].funcs->info); |
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198 pos++; |
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199 } /* if */ |
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200 } /* for */ |
| 4 | 201 |
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202 available_decoders[pos] = NULL; |
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203 |
| 4 | 204 initialized = 1; |
| 205 return(1); | |
| 206 } /* Sound_Init */ | |
| 207 | |
| 208 | |
| 209 int Sound_Quit(void) | |
| 210 { | |
|
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211 ErrMsg *err; |
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212 ErrMsg *nexterr = NULL; |
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213 size_t i; |
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214 |
| 4 | 215 BAIL_IF_MACRO(!initialized, ERR_NOT_INITIALIZED, 0); |
| 216 | |
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217 while (((volatile Sound_Sample *) sample_list) != NULL) |
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218 Sound_FreeSample(sample_list); |
| 4 | 219 |
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220 initialized = 0; |
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221 |
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222 SDL_DestroyMutex(samplelist_mutex); |
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223 samplelist_mutex = NULL; |
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224 sample_list = NULL; |
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225 |
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118
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226 for (i = 0; decoders[i].funcs != NULL; i++) |
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227 { |
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228 if (decoders[i].available) |
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229 { |
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230 decoders[i].funcs->quit(); |
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231 decoders[i].available = 0; |
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232 } /* if */ |
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233 } /* for */ |
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234 |
| 4 | 235 if (available_decoders != NULL) |
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236 free((void *) available_decoders); |
| 4 | 237 available_decoders = NULL; |
| 238 | |
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239 /* clean up error state for each thread... */ |
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240 SDL_LockMutex(errorlist_mutex); |
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241 for (err = error_msgs; err != NULL; err = nexterr) |
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242 { |
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243 nexterr = err->next; |
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244 free(err); |
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245 } /* for */ |
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246 error_msgs = NULL; |
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247 SDL_UnlockMutex(errorlist_mutex); |
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248 SDL_DestroyMutex(errorlist_mutex); |
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249 errorlist_mutex = NULL; |
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250 |
| 4 | 251 return(1); |
| 252 } /* Sound_Quit */ | |
| 253 | |
| 254 | |
| 255 const Sound_DecoderInfo **Sound_AvailableDecoders(void) | |
| 256 { | |
| 257 return(available_decoders); /* READ. ONLY. */ | |
| 258 } /* Sound_AvailableDecoders */ | |
| 259 | |
| 260 | |
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261 static ErrMsg *findErrorForCurrentThread(void) |
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262 { |
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263 ErrMsg *i; |
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264 Uint32 tid; |
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265 |
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266 if (error_msgs != NULL) |
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267 { |
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268 tid = SDL_ThreadID(); |
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269 |
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270 SDL_LockMutex(errorlist_mutex); |
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271 for (i = error_msgs; i != NULL; i = i->next) |
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272 { |
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273 if (i->tid == tid) |
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274 { |
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275 SDL_UnlockMutex(errorlist_mutex); |
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276 return(i); |
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277 } /* if */ |
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278 } /* for */ |
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279 SDL_UnlockMutex(errorlist_mutex); |
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280 } /* if */ |
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281 |
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282 return(NULL); /* no error available. */ |
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283 } /* findErrorForCurrentThread */ |
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284 |
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285 |
| 4 | 286 const char *Sound_GetError(void) |
| 287 { | |
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288 const char *retval = NULL; |
|
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289 ErrMsg *err; |
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290 |
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291 if (!initialized) |
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292 return(ERR_NOT_INITIALIZED); |
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293 |
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294 err = findErrorForCurrentThread(); |
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295 if ((err != NULL) && (err->error_available)) |
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296 { |
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297 retval = err->error_string; |
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298 err->error_available = 0; |
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299 } /* if */ |
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300 |
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301 return(retval); |
| 4 | 302 } /* Sound_GetError */ |
| 303 | |
| 304 | |
| 305 void Sound_ClearError(void) | |
| 306 { | |
|
226
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307 ErrMsg *err; |
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308 |
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309 if (!initialized) |
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310 return; |
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311 |
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312 err = findErrorForCurrentThread(); |
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313 if (err != NULL) |
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314 err->error_available = 0; |
| 4 | 315 } /* Sound_ClearError */ |
| 316 | |
| 317 | |
| 318 /* | |
| 319 * This is declared in the internal header. | |
| 320 */ | |
|
306
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321 void __Sound_SetError(const char *str) |
| 4 | 322 { |
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323 ErrMsg *err; |
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324 |
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325 if (str == NULL) |
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326 return; |
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327 |
|
387
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328 SNDDBG(("__Sound_SetError(\"%s\");%s\n", str, |
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226
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329 (initialized) ? "" : " [NOT INITIALIZED!]")); |
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330 |
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331 if (!initialized) |
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332 return; |
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333 |
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334 err = findErrorForCurrentThread(); |
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335 if (err == NULL) |
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165
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336 { |
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337 err = (ErrMsg *) malloc(sizeof (ErrMsg)); |
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338 if (err == NULL) |
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339 return; /* uhh...? */ |
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340 |
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341 memset((void *) err, '\0', sizeof (ErrMsg)); |
|
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342 err->tid = SDL_ThreadID(); |
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343 |
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344 SDL_LockMutex(errorlist_mutex); |
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345 err->next = error_msgs; |
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346 error_msgs = err; |
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347 SDL_UnlockMutex(errorlist_mutex); |
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348 } /* if */ |
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349 |
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350 err->error_available = 1; |
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351 strncpy(err->error_string, str, sizeof (err->error_string)); |
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352 err->error_string[sizeof (err->error_string) - 1] = '\0'; |
|
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353 } /* __Sound_SetError */ |
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354 |
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355 |
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356 Uint32 __Sound_convertMsToBytePos(Sound_AudioInfo *info, Uint32 ms) |
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357 { |
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358 /* "frames" == "sample frames" */ |
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359 float frames_per_ms = ((float) info->rate) / 1000.0f; |
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360 Uint32 frame_offset = (Uint32) (frames_per_ms * ((float) ms)); |
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361 Uint32 frame_size = (Uint32) ((info->format & 0xFF) / 8) * info->channels; |
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362 return(frame_offset * frame_size); |
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363 } /* __Sound_convertMsToBytePos */ |
| 4 | 364 |
| 365 | |
| 366 /* | |
| 367 * -ansi and -pedantic flags prevent use of strcasecmp() on Linux, and | |
| 368 * I honestly don't want to mess around with figuring out if a given | |
| 369 * platform has "strcasecmp", "stricmp", or | |
| 370 * "compare_two_damned_strings_case_insensitive", which I hear is in the | |
| 371 * next release of Carbon. :) This is exported so decoders may use it if | |
| 372 * they like. | |
| 373 */ | |
| 374 int __Sound_strcasecmp(const char *x, const char *y) | |
| 375 { | |
| 376 int ux, uy; | |
| 377 | |
|
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378 if (x == y) /* same pointer? Both NULL? */ |
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379 return(0); |
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380 |
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381 if (x == NULL) |
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382 return(-1); |
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383 |
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384 if (y == NULL) |
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385 return(1); |
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386 |
| 4 | 387 do |
| 388 { | |
| 389 ux = toupper((int) *x); | |
| 390 uy = toupper((int) *y); | |
| 391 if (ux > uy) | |
| 392 return(1); | |
| 393 else if (ux < uy) | |
| 394 return(-1); | |
| 395 x++; | |
| 396 y++; | |
| 397 } while ((ux) && (uy)); | |
| 398 | |
| 399 return(0); | |
| 400 } /* __Sound_strcasecmp */ | |
| 401 | |
| 402 | |
| 403 /* | |
| 404 * Allocate a Sound_Sample, and fill in most of its fields. Those that need | |
| 405 * to be filled in later, by a decoder, will be initialized to zero. | |
| 406 */ | |
| 407 static Sound_Sample *alloc_sample(SDL_RWops *rw, Sound_AudioInfo *desired, | |
| 408 Uint32 bufferSize) | |
| 409 { | |
| 410 Sound_Sample *retval = malloc(sizeof (Sound_Sample)); | |
| 411 Sound_SampleInternal *internal = malloc(sizeof (Sound_SampleInternal)); | |
| 412 if ((retval == NULL) || (internal == NULL)) | |
| 413 { | |
|
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414 __Sound_SetError(ERR_OUT_OF_MEMORY); |
| 4 | 415 if (retval) |
| 416 free(retval); | |
| 417 if (internal) | |
| 418 free(internal); | |
| 419 | |
| 420 return(NULL); | |
| 421 } /* if */ | |
| 422 | |
| 423 memset(retval, '\0', sizeof (Sound_Sample)); | |
| 424 memset(internal, '\0', sizeof (Sound_SampleInternal)); | |
| 425 | |
| 426 assert(bufferSize > 0); | |
| 427 retval->buffer = malloc(bufferSize); /* pure ugly. */ | |
| 428 if (!retval->buffer) | |
| 429 { | |
|
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430 __Sound_SetError(ERR_OUT_OF_MEMORY); |
| 4 | 431 free(internal); |
| 432 free(retval); | |
| 433 return(NULL); | |
| 434 } /* if */ | |
| 435 memset(retval->buffer, '\0', bufferSize); | |
| 436 retval->buffer_size = bufferSize; | |
| 437 | |
| 438 if (desired != NULL) | |
| 439 memcpy(&retval->desired, desired, sizeof (Sound_AudioInfo)); | |
| 440 | |
| 441 internal->rw = rw; | |
| 442 retval->opaque = internal; | |
| 443 return(retval); | |
| 444 } /* alloc_sample */ | |
| 445 | |
| 446 | |
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447 #if (defined DEBUG_CHATTER) |
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448 static __inline__ const char *fmt_to_str(Uint16 fmt) |
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449 { |
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450 switch(fmt) |
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451 { |
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452 case AUDIO_U8: |
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453 return("U8"); |
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454 case AUDIO_S8: |
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455 return("S8"); |
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456 case AUDIO_U16LSB: |
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457 return("U16LSB"); |
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458 case AUDIO_S16LSB: |
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459 return("S16LSB"); |
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460 case AUDIO_U16MSB: |
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461 return("U16MSB"); |
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462 case AUDIO_S16MSB: |
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463 return("S16MSB"); |
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464 } /* switch */ |
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465 |
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466 return("Unknown"); |
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467 } /* fmt_to_str */ |
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468 #endif |
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469 |
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470 |
| 4 | 471 /* |
| 472 * The bulk of the Sound_NewSample() work is done here... | |
| 473 * Ask the specified decoder to handle the data in (rw), and if | |
| 474 * so, construct the Sound_Sample. Otherwise, try to wind (rw)'s stream | |
| 475 * back to where it was, and return false. | |
| 476 */ | |
| 477 static int init_sample(const Sound_DecoderFunctions *funcs, | |
| 478 Sound_Sample *sample, const char *ext, | |
| 479 Sound_AudioInfo *_desired) | |
| 480 { | |
| 481 Sound_SampleInternal *internal = (Sound_SampleInternal *) sample->opaque; | |
|
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482 Sound_AudioInfo desired; |
| 400 | 483 int pos = SDL_RWtell(internal->rw); |
| 4 | 484 |
| 485 /* fill in the funcs for this decoder... */ | |
| 486 sample->decoder = &funcs->info; | |
| 487 internal->funcs = funcs; | |
| 488 if (!funcs->open(sample, ext)) | |
| 489 { | |
| 490 SDL_RWseek(internal->rw, pos, SEEK_SET); /* set for next try... */ | |
| 491 return(0); | |
| 492 } /* if */ | |
| 493 | |
| 494 /* success; we've got a decoder! */ | |
| 495 | |
| 496 /* Now we need to set up the conversion buffer... */ | |
| 497 | |
| 498 memcpy(&desired, (_desired != NULL) ? _desired : &sample->actual, | |
| 499 sizeof (Sound_AudioInfo)); | |
| 500 | |
|
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501 if (desired.format == 0) |
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502 desired.format = sample->actual.format; |
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503 if (desired.channels == 0) |
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504 desired.channels = sample->actual.channels; |
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505 if (desired.rate == 0) |
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506 desired.rate = sample->actual.rate; |
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507 |
|
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508 if (Sound_BuildAudioCVT(&internal->sdlcvt, |
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509 sample->actual.format, |
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510 sample->actual.channels, |
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511 sample->actual.rate, |
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512 desired.format, |
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513 desired.channels, |
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514 desired.rate, |
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515 sample->buffer_size) == -1) |
| 4 | 516 { |
|
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517 __Sound_SetError(SDL_GetError()); |
| 4 | 518 funcs->close(sample); |
| 519 SDL_RWseek(internal->rw, pos, SEEK_SET); /* set for next try... */ | |
| 520 return(0); | |
| 521 } /* if */ | |
| 522 | |
| 523 if (internal->sdlcvt.len_mult > 1) | |
| 524 { | |
| 525 void *rc = realloc(sample->buffer, | |
|
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526 sample->buffer_size * internal->sdlcvt.len_mult); |
| 4 | 527 if (rc == NULL) |
| 528 { | |
| 529 funcs->close(sample); | |
| 530 SDL_RWseek(internal->rw, pos, SEEK_SET); /* set for next try... */ | |
| 531 return(0); | |
| 532 } /* if */ | |
| 533 | |
| 534 sample->buffer = rc; | |
| 535 } /* if */ | |
| 536 | |
| 537 /* these pointers are all one and the same. */ | |
| 538 memcpy(&sample->desired, &desired, sizeof (Sound_AudioInfo)); | |
| 539 internal->sdlcvt.buf = internal->buffer = sample->buffer; | |
| 540 internal->buffer_size = sample->buffer_size / internal->sdlcvt.len_mult; | |
| 541 internal->sdlcvt.len = internal->buffer_size; | |
| 542 | |
|
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543 /* Prepend our new Sound_Sample to the sample_list... */ |
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544 SDL_LockMutex(samplelist_mutex); |
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545 internal->next = sample_list; |
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546 if (sample_list != NULL) |
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547 ((Sound_SampleInternal *) sample_list->opaque)->prev = sample; |
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548 sample_list = sample; |
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549 SDL_UnlockMutex(samplelist_mutex); |
| 4 | 550 |
|
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551 SNDDBG(("New sample DESIRED format: %s format, %d rate, %d channels.\n", |
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552 fmt_to_str(sample->desired.format), |
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553 sample->desired.rate, |
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554 sample->desired.channels)); |
|
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555 |
|
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556 SNDDBG(("New sample ACTUAL format: %s format, %d rate, %d channels.\n", |
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557 fmt_to_str(sample->actual.format), |
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558 sample->actual.rate, |
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559 sample->actual.channels)); |
|
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560 |
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561 SNDDBG(("On-the-fly conversion: %s.\n", |
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562 internal->sdlcvt.needed ? "ENABLED" : "DISABLED")); |
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563 |
| 4 | 564 return(1); |
| 565 } /* init_sample */ | |
| 566 | |
| 567 | |
| 568 Sound_Sample *Sound_NewSample(SDL_RWops *rw, const char *ext, | |
| 569 Sound_AudioInfo *desired, Uint32 bSize) | |
| 570 { | |
| 571 Sound_Sample *retval; | |
|
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572 decoder_element *decoder; |
| 4 | 573 |
| 574 /* sanity checks. */ | |
| 575 BAIL_IF_MACRO(!initialized, ERR_NOT_INITIALIZED, NULL); | |
| 576 BAIL_IF_MACRO(rw == NULL, ERR_INVALID_ARGUMENT, NULL); | |
| 577 | |
| 578 retval = alloc_sample(rw, desired, bSize); | |
| 579 if (!retval) | |
| 580 return(NULL); /* alloc_sample() sets error message... */ | |
| 581 | |
| 582 if (ext != NULL) | |
| 583 { | |
|
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584 for (decoder = &decoders[0]; decoder->funcs != NULL; decoder++) |
| 4 | 585 { |
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586 if (decoder->available) |
| 4 | 587 { |
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588 const char **decoderExt = decoder->funcs->info.extensions; |
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589 while (*decoderExt) |
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590 { |
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591 if (__Sound_strcasecmp(*decoderExt, ext) == 0) |
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592 { |
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593 if (init_sample(decoder->funcs, retval, ext, desired)) |
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594 return(retval); |
|
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595 break; /* done with this decoder either way. */ |
|
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596 } /* if */ |
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597 decoderExt++; |
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598 } /* while */ |
| 4 | 599 } /* if */ |
| 600 } /* for */ | |
| 601 } /* if */ | |
| 602 | |
| 603 /* no direct extension match? Try everything we've got... */ | |
|
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604 for (decoder = &decoders[0]; decoder->funcs != NULL; decoder++) |
| 4 | 605 { |
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606 if (decoder->available) |
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607 { |
|
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608 int should_try = 1; |
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609 const char **decoderExt = decoder->funcs->info.extensions; |
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610 |
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611 /* skip if we would have tried decoder above... */ |
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612 while (*decoderExt) |
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613 { |
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614 if (__Sound_strcasecmp(*decoderExt, ext) == 0) |
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615 { |
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616 should_try = 0; |
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617 break; |
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618 } /* if */ |
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619 decoderExt++; |
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620 } /* while */ |
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621 |
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622 if (should_try) |
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623 { |
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624 if (init_sample(decoder->funcs, retval, ext, desired)) |
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625 return(retval); |
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626 } /* if */ |
|
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627 } /* if */ |
| 4 | 628 } /* for */ |
| 629 | |
| 630 /* nothing could handle the sound data... */ | |
| 631 free(retval->opaque); | |
| 632 if (retval->buffer != NULL) | |
| 633 free(retval->buffer); | |
| 634 free(retval); | |
| 635 SDL_RWclose(rw); | |
|
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636 __Sound_SetError(ERR_UNSUPPORTED_FORMAT); |
| 4 | 637 return(NULL); |
| 638 } /* Sound_NewSample */ | |
| 639 | |
| 640 | |
| 641 Sound_Sample *Sound_NewSampleFromFile(const char *filename, | |
| 642 Sound_AudioInfo *desired, | |
| 643 Uint32 bufferSize) | |
| 644 { | |
| 645 const char *ext; | |
| 646 SDL_RWops *rw; | |
| 647 | |
| 648 BAIL_IF_MACRO(!initialized, ERR_NOT_INITIALIZED, NULL); | |
| 649 BAIL_IF_MACRO(filename == NULL, ERR_INVALID_ARGUMENT, NULL); | |
| 650 | |
| 651 ext = strrchr(filename, '.'); | |
| 652 rw = SDL_RWFromFile(filename, "rb"); | |
| 653 BAIL_IF_MACRO(rw == NULL, SDL_GetError(), NULL); | |
| 654 | |
| 655 if (ext != NULL) | |
| 656 ext++; | |
| 657 | |
| 658 return(Sound_NewSample(rw, ext, desired, bufferSize)); | |
| 659 } /* Sound_NewSampleFromFile */ | |
| 660 | |
| 661 | |
| 662 void Sound_FreeSample(Sound_Sample *sample) | |
| 663 { | |
| 664 Sound_SampleInternal *internal; | |
| 665 | |
| 666 if (!initialized) | |
| 667 { | |
|
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668 __Sound_SetError(ERR_NOT_INITIALIZED); |
| 4 | 669 return; |
| 670 } /* if */ | |
| 671 | |
| 672 if (sample == NULL) | |
| 673 { | |
|
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674 __Sound_SetError(ERR_INVALID_ARGUMENT); |
| 4 | 675 return; |
| 676 } /* if */ | |
| 677 | |
| 678 internal = (Sound_SampleInternal *) sample->opaque; | |
| 679 | |
|
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680 SDL_LockMutex(samplelist_mutex); |
| 4 | 681 |
|
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682 /* update the sample_list... */ |
| 4 | 683 if (internal->prev != NULL) |
| 684 { | |
| 685 Sound_SampleInternal *prevInternal; | |
| 686 prevInternal = (Sound_SampleInternal *) internal->prev->opaque; | |
| 687 prevInternal->next = internal->next; | |
| 688 } /* if */ | |
| 689 else | |
| 690 { | |
|
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691 assert(sample_list == sample); |
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692 sample_list = internal->next; |
| 4 | 693 } /* else */ |
| 694 | |
| 695 if (internal->next != NULL) | |
| 696 { | |
| 697 Sound_SampleInternal *nextInternal; | |
| 698 nextInternal = (Sound_SampleInternal *) internal->next->opaque; | |
| 699 nextInternal->prev = internal->prev; | |
| 700 } /* if */ | |
| 701 | |
|
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702 SDL_UnlockMutex(samplelist_mutex); |
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703 |
| 4 | 704 /* nuke it... */ |
|
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705 internal->funcs->close(sample); |
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706 |
| 4 | 707 if (internal->rw != NULL) /* this condition is a "just in case" thing. */ |
| 708 SDL_RWclose(internal->rw); | |
|
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709 |
|
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710 if ((internal->buffer != NULL) && (internal->buffer != sample->buffer)) |
| 4 | 711 free(internal->buffer); |
|
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712 |
| 4 | 713 free(internal); |
|
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714 |
| 4 | 715 if (sample->buffer != NULL) |
| 716 free(sample->buffer); | |
|
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717 |
| 4 | 718 free(sample); |
| 719 } /* Sound_FreeSample */ | |
| 720 | |
| 721 | |
| 722 int Sound_SetBufferSize(Sound_Sample *sample, Uint32 newSize) | |
| 723 { | |
| 724 void *newBuf = NULL; | |
| 725 Sound_SampleInternal *internal = NULL; | |
| 726 | |
| 727 BAIL_IF_MACRO(!initialized, ERR_NOT_INITIALIZED, 0); | |
| 728 BAIL_IF_MACRO(sample == NULL, ERR_INVALID_ARGUMENT, 0); | |
| 729 internal = ((Sound_SampleInternal *) sample->opaque); | |
| 730 newBuf = realloc(sample->buffer, newSize * internal->sdlcvt.len_mult); | |
| 731 BAIL_IF_MACRO(newBuf == NULL, ERR_OUT_OF_MEMORY, 0); | |
| 732 | |
| 733 internal->sdlcvt.buf = internal->buffer = sample->buffer = newBuf; | |
| 734 sample->buffer_size = newSize; | |
| 735 internal->buffer_size = newSize / internal->sdlcvt.len_mult; | |
| 736 internal->sdlcvt.len = internal->buffer_size; | |
| 737 | |
| 738 return(1); | |
| 739 } /* Sound_SetBufferSize */ | |
| 740 | |
| 741 | |
| 742 Uint32 Sound_Decode(Sound_Sample *sample) | |
| 743 { | |
| 744 Sound_SampleInternal *internal = NULL; | |
| 745 Uint32 retval = 0; | |
| 746 | |
| 747 /* a boatload of sanity checks... */ | |
| 748 BAIL_IF_MACRO(!initialized, ERR_NOT_INITIALIZED, 0); | |
| 749 BAIL_IF_MACRO(sample == NULL, ERR_INVALID_ARGUMENT, 0); | |
| 750 BAIL_IF_MACRO(sample->flags & SOUND_SAMPLEFLAG_ERROR, ERR_PREV_ERROR, 0); | |
| 751 BAIL_IF_MACRO(sample->flags & SOUND_SAMPLEFLAG_EOF, ERR_PREV_EOF, 0); | |
| 752 | |
| 753 internal = (Sound_SampleInternal *) sample->opaque; | |
| 754 | |
| 755 assert(sample->buffer != NULL); | |
| 756 assert(sample->buffer_size > 0); | |
| 757 assert(internal->buffer != NULL); | |
| 758 assert(internal->buffer_size > 0); | |
| 759 | |
| 760 /* reset EAGAIN. Decoder can flip it back on if it needs to. */ | |
|
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761 sample->flags &= ~SOUND_SAMPLEFLAG_EAGAIN; |
| 4 | 762 retval = internal->funcs->read(sample); |
|
37
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763 |
|
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764 if (retval > 0 && internal->sdlcvt.needed) |
| 4 | 765 { |
| 766 internal->sdlcvt.len = retval; | |
|
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767 Sound_ConvertAudio(&internal->sdlcvt); |
|
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768 retval = internal->sdlcvt.len_cvt; |
| 4 | 769 } /* if */ |
| 770 | |
| 771 return(retval); | |
| 772 } /* Sound_Decode */ | |
| 773 | |
| 774 | |
| 775 Uint32 Sound_DecodeAll(Sound_Sample *sample) | |
| 776 { | |
| 777 Sound_SampleInternal *internal = NULL; | |
| 778 void *buf = NULL; | |
| 779 Uint32 newBufSize = 0; | |
| 780 | |
| 781 BAIL_IF_MACRO(!initialized, ERR_NOT_INITIALIZED, 0); | |
|
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782 BAIL_IF_MACRO(sample->flags & SOUND_SAMPLEFLAG_EOF, ERR_PREV_EOF, 0); |
|
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783 BAIL_IF_MACRO(sample->flags & SOUND_SAMPLEFLAG_ERROR, ERR_PREV_ERROR, 0); |
| 4 | 784 |
| 785 internal = (Sound_SampleInternal *) sample->opaque; | |
| 786 | |
| 787 while ( ((sample->flags & SOUND_SAMPLEFLAG_EOF) == 0) && | |
| 788 ((sample->flags & SOUND_SAMPLEFLAG_ERROR) == 0) ) | |
| 789 { | |
|
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790 Uint32 br = Sound_Decode(sample); |
|
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791 void *ptr = realloc(buf, newBufSize + br); |
| 4 | 792 if (ptr == NULL) |
| 793 { | |
| 794 sample->flags |= SOUND_SAMPLEFLAG_ERROR; | |
|
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795 __Sound_SetError(ERR_OUT_OF_MEMORY); |
| 4 | 796 } /* if */ |
| 797 else | |
| 798 { | |
|
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799 buf = ptr; |
| 4 | 800 memcpy( ((char *) buf) + newBufSize, sample->buffer, br ); |
| 801 newBufSize += br; | |
| 802 } /* else */ | |
| 803 } /* while */ | |
| 804 | |
|
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805 if (buf == NULL) /* ...in case first call to realloc() fails... */ |
|
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806 return(sample->buffer_size); |
|
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|
807 |
|
167
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808 if (internal->buffer != sample->buffer) |
|
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809 free(internal->buffer); |
|
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810 |
| 4 | 811 free(sample->buffer); |
|
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812 |
|
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813 internal->sdlcvt.buf = internal->buffer = sample->buffer = buf; |
| 4 | 814 sample->buffer_size = newBufSize; |
| 815 internal->buffer_size = newBufSize / internal->sdlcvt.len_mult; | |
|
167
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816 internal->sdlcvt.len = internal->buffer_size; |
| 4 | 817 |
| 818 return(newBufSize); | |
| 819 } /* Sound_DecodeAll */ | |
| 820 | |
|
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821 |
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822 int Sound_Rewind(Sound_Sample *sample) |
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823 { |
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824 Sound_SampleInternal *internal; |
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825 BAIL_IF_MACRO(!initialized, ERR_NOT_INITIALIZED, 0); |
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826 |
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827 internal = (Sound_SampleInternal *) sample->opaque; |
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828 if (!internal->funcs->rewind(sample)) |
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829 { |
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830 sample->flags |= SOUND_SAMPLEFLAG_ERROR; |
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831 return(0); |
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832 } /* if */ |
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833 |
|
311
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834 sample->flags &= ~SOUND_SAMPLEFLAG_EAGAIN; |
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835 sample->flags &= ~SOUND_SAMPLEFLAG_ERROR; |
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836 sample->flags &= ~SOUND_SAMPLEFLAG_EOF; |
|
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Added framework for Sound_Seek() support.
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837 |
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838 return(1); |
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839 } /* Sound_Rewind */ |
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840 |
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841 |
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842 int Sound_Seek(Sound_Sample *sample, Uint32 ms) |
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843 { |
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844 Sound_SampleInternal *internal; |
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845 |
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846 BAIL_IF_MACRO(!initialized, ERR_NOT_INITIALIZED, 0); |
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847 if (!(sample->flags & SOUND_SAMPLEFLAG_CANSEEK)) |
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848 BAIL_MACRO(ERR_CANNOT_SEEK, 0); |
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849 |
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850 internal = (Sound_SampleInternal *) sample->opaque; |
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851 BAIL_IF_MACRO(!internal->funcs->seek(sample, ms), NULL, 0); |
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852 |
|
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853 sample->flags &= ~SOUND_SAMPLEFLAG_EAGAIN; |
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854 sample->flags &= ~SOUND_SAMPLEFLAG_ERROR; |
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855 sample->flags &= ~SOUND_SAMPLEFLAG_EOF; |
|
306
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856 |
|
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857 return(1); |
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858 } /* Sound_Rewind */ |
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859 |
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860 |
| 4 | 861 /* end of SDL_sound.c ... */ |
| 862 |