Mercurial > SDL_sound_CoreAudio
annotate SDL_sound.c @ 474:c66080364dff
Most decoders now report total sample play time, now. Technically, this
breaks binary compatibility with the 1.0 branch, since it extends the
Sound_Sample struct, but most (all?) programs are just passing pointers
allocated by SDL_sound around, and might be okay.
Source-level compatibility is not broken...yet! :)
--ryan.
-------- Original Message --------
Subject: SDL_sound patch: Finding total length of time of sound file.
Date: Sun, 26 Jan 2003 09:31:17 -0800 (PST)
Hi Ryan,
I am working with Eric Wing and helping him modify
SDL_sound. AS part of our efforts in improving and
enhancing SDL_sound, we like to submit this patch. We
modified the codecs to find the total time of a sound
file. Below is the explanation of the patch. The
patch is appended as an attachment to this email.
* MOTIVATION:
We needed the ability to get the total play time of a
sample (And we noticed that we're not the only ones).
Since SDL_sound blocks direct access to the specific
decoders, there is no way for a user to know this
information short of decoding the whole thing.
Because of this, we believe this will be a useful
addition, even though the accuracy may not be perfect
(subject to each decoder) or the information may not
always be available.
* CONTRIBUTORS:
Wesley Leong (modified the majority of the codecs and
verified the results)
Eric Wing (showed everyone how to do modify codec,
modified mikmod)
Wang Lam (modified a handful of codecs, researched
into specs and int overflow)
Ahilan Anantha (modified a few codecs and helped with
integer math)
* GENERAL ISSUES:
We chose the value to be milliseconds as an Sint32.
Milliseconds because that's what Sound_Seek takes as a
parameter and -1 to allow for instances/codecs where
the value could not be determined. We are
not sure if this is the final convention you want, so
we are willing to work with you on this.
We also expect the total_time field to be set on open
and never again modified by SDL_sound. Users may
access it directly much like the sample buffer and
buffer_size. We thought about recomputing the time
on DecodeAll, but since users may seek or decode small
chunks first, not all the data may be there. So this
is better done by the user. This may be good
information to document.
Currently, all the main codecs are implemented except
for QuickTime.
author | Ryan C. Gordon <icculus@icculus.org> |
---|---|
date | Sat, 08 May 2004 08:19:50 +0000 |
parents | 6d328f00c20d |
children | 3e705c9180e5 50bb9a6cebfe |
rev | line source |
---|---|
4 | 1 /* |
2 * SDL_sound -- An abstract sound format decoding API. | |
3 * Copyright (C) 2001 Ryan C. Gordon. | |
4 * | |
5 * This library is free software; you can redistribute it and/or | |
6 * modify it under the terms of the GNU Lesser General Public | |
7 * License as published by the Free Software Foundation; either | |
8 * version 2.1 of the License, or (at your option) any later version. | |
9 * | |
10 * This library is distributed in the hope that it will be useful, | |
11 * but WITHOUT ANY WARRANTY; without even the implied warranty of | |
12 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU | |
13 * Lesser General Public License for more details. | |
14 * | |
15 * You should have received a copy of the GNU Lesser General Public | |
16 * License along with this library; if not, write to the Free Software | |
17 * Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA | |
18 */ | |
19 | |
20 /** | |
21 * This file implements the core API, which is relatively simple. | |
22 * The real meat of SDL_sound is in the decoders directory. | |
23 * | |
24 * Documentation is in SDL_sound.h ... It's verbose, honest. :) | |
25 * | |
184
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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 <ctype.h> | |
39 | |
40 #include "SDL.h" | |
441
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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 | |
262 | 50 #if (defined SOUND_SUPPORTS_SMPEG) |
51 extern const Sound_DecoderFunctions __Sound_DecoderFunctions_SMPEG; | |
52 #endif | |
53 | |
54 #if (defined SOUND_SUPPORTS_MPGLIB) | |
55 extern const Sound_DecoderFunctions __Sound_DecoderFunctions_MPGLIB; | |
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56 #endif |
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57 |
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58 #if (defined SOUND_SUPPORTS_MIKMOD) |
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59 extern const Sound_DecoderFunctions __Sound_DecoderFunctions_MIKMOD; |
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60 #endif |
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61 |
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62 #if (defined SOUND_SUPPORTS_MODPLUG) |
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63 extern const Sound_DecoderFunctions __Sound_DecoderFunctions_MODPLUG; |
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64 #endif |
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65 |
20 | 66 #if (defined SOUND_SUPPORTS_WAV) |
67 extern const Sound_DecoderFunctions __Sound_DecoderFunctions_WAV; | |
68 #endif | |
69 | |
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70 #if (defined SOUND_SUPPORTS_AIFF) |
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71 extern const Sound_DecoderFunctions __Sound_DecoderFunctions_AIFF; |
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72 #endif |
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73 |
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74 #if (defined SOUND_SUPPORTS_AU) |
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75 extern const Sound_DecoderFunctions __Sound_DecoderFunctions_AU; |
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76 #endif |
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77 |
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78 #if (defined SOUND_SUPPORTS_OGG) |
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79 extern const Sound_DecoderFunctions __Sound_DecoderFunctions_OGG; |
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80 #endif |
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81 |
4 | 82 #if (defined SOUND_SUPPORTS_VOC) |
83 extern const Sound_DecoderFunctions __Sound_DecoderFunctions_VOC; | |
84 #endif | |
85 | |
86 #if (defined SOUND_SUPPORTS_RAW) | |
87 extern const Sound_DecoderFunctions __Sound_DecoderFunctions_RAW; | |
88 #endif | |
89 | |
102 | 90 #if (defined SOUND_SUPPORTS_SHN) |
91 extern const Sound_DecoderFunctions __Sound_DecoderFunctions_SHN; | |
92 #endif | |
93 | |
110 | 94 #if (defined SOUND_SUPPORTS_MIDI) |
95 extern const Sound_DecoderFunctions __Sound_DecoderFunctions_MIDI; | |
96 #endif | |
97 | |
157 | 98 #if (defined SOUND_SUPPORTS_FLAC) |
99 extern const Sound_DecoderFunctions __Sound_DecoderFunctions_FLAC; | |
100 #endif | |
101 | |
322 | 102 #if (defined SOUND_SUPPORTS_QUICKTIME) |
103 extern const Sound_DecoderFunctions __Sound_DecoderFunctions_QuickTime; | |
104 #endif | |
48
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105 |
450 | 106 #if (defined SOUND_SUPPORTS_SPEEX) |
107 extern const Sound_DecoderFunctions __Sound_DecoderFunctions_SPEEX; | |
108 #endif | |
109 | |
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110 typedef struct |
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111 { |
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112 int available; |
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113 const Sound_DecoderFunctions *funcs; |
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114 } decoder_element; |
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115 |
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116 static decoder_element decoders[] = |
4 | 117 { |
262 | 118 #if (defined SOUND_SUPPORTS_SMPEG) |
119 { 0, &__Sound_DecoderFunctions_SMPEG }, | |
120 #endif | |
121 | |
122 #if (defined SOUND_SUPPORTS_MPGLIB) | |
123 { 0, &__Sound_DecoderFunctions_MPGLIB }, | |
48
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124 #endif |
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125 |
237
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126 #if (defined SOUND_SUPPORTS_MODPLUG) |
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127 { 0, &__Sound_DecoderFunctions_MODPLUG }, |
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128 #endif |
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129 |
209
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130 #if (defined SOUND_SUPPORTS_MIKMOD) |
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131 { 0, &__Sound_DecoderFunctions_MIKMOD }, |
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132 #endif |
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133 |
20 | 134 #if (defined SOUND_SUPPORTS_WAV) |
48
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135 { 0, &__Sound_DecoderFunctions_WAV }, |
20 | 136 #endif |
137 | |
37
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138 #if (defined SOUND_SUPPORTS_AIFF) |
48
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139 { 0, &__Sound_DecoderFunctions_AIFF }, |
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140 #endif |
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141 |
216
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142 #if (defined SOUND_SUPPORTS_AU) |
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143 { 0, &__Sound_DecoderFunctions_AU }, |
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144 #endif |
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145 |
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146 #if (defined SOUND_SUPPORTS_OGG) |
48
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147 { 0, &__Sound_DecoderFunctions_OGG }, |
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148 #endif |
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149 |
4 | 150 #if (defined SOUND_SUPPORTS_VOC) |
48
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151 { 0, &__Sound_DecoderFunctions_VOC }, |
4 | 152 #endif |
153 | |
154 #if (defined SOUND_SUPPORTS_RAW) | |
48
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155 { 0, &__Sound_DecoderFunctions_RAW }, |
4 | 156 #endif |
102 | 157 |
158 #if (defined SOUND_SUPPORTS_SHN) | |
159 { 0, &__Sound_DecoderFunctions_SHN }, | |
160 #endif | |
110 | 161 |
163
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162 #if (defined SOUND_SUPPORTS_FLAC) |
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163 { 0, &__Sound_DecoderFunctions_FLAC }, |
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164 #endif |
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165 |
110 | 166 #if (defined SOUND_SUPPORTS_MIDI) |
167 { 0, &__Sound_DecoderFunctions_MIDI }, | |
168 #endif | |
118
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169 |
322 | 170 #if (defined SOUND_SUPPORTS_QUICKTIME) |
171 { 0, &__Sound_DecoderFunctions_QuickTime }, | |
172 #endif | |
173 | |
450 | 174 #if (defined SOUND_SUPPORTS_SPEEX) |
175 { 0, &__Sound_DecoderFunctions_SPEEX }, | |
176 #endif | |
177 | |
118
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178 { 0, NULL } |
4 | 179 }; |
180 | |
181 | |
182 | |
183 /* General SDL_sound state ... */ | |
184 | |
219
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185 typedef struct __SOUND_ERRMSGTYPE__ |
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186 { |
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187 Uint32 tid; |
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188 int error_available; |
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189 char error_string[128]; |
219
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190 struct __SOUND_ERRMSGTYPE__ *next; |
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191 } ErrMsg; |
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192 |
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193 static ErrMsg *error_msgs = NULL; |
219
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194 static SDL_mutex *errorlist_mutex = NULL; |
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195 |
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196 static Sound_Sample *sample_list = NULL; /* this is a linked list. */ |
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197 static SDL_mutex *samplelist_mutex = NULL; |
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198 |
4 | 199 static const Sound_DecoderInfo **available_decoders = NULL; |
219
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200 static int initialized = 0; |
4 | 201 |
202 | |
203 /* functions ... */ | |
204 | |
205 void Sound_GetLinkedVersion(Sound_Version *ver) | |
206 { | |
207 if (ver != NULL) | |
208 { | |
209 ver->major = SOUND_VER_MAJOR; | |
210 ver->minor = SOUND_VER_MINOR; | |
211 ver->patch = SOUND_VER_PATCH; | |
212 } /* if */ | |
213 } /* Sound_GetLinkedVersion */ | |
214 | |
215 | |
216 int Sound_Init(void) | |
217 { | |
218 size_t i; | |
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219 size_t pos = 0; |
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220 size_t total = sizeof (decoders) / sizeof (decoders[0]); |
4 | 221 BAIL_IF_MACRO(initialized, ERR_IS_INITIALIZED, 0); |
219
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222 |
237
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223 sample_list = NULL; |
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224 error_msgs = NULL; |
4 | 225 |
226 available_decoders = (const Sound_DecoderInfo **) | |
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227 malloc((total) * sizeof (Sound_DecoderInfo *)); |
4 | 228 BAIL_IF_MACRO(available_decoders == NULL, ERR_OUT_OF_MEMORY, 0); |
229 | |
432
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230 SDL_InitSubSystem(SDL_INIT_AUDIO); |
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231 |
226
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232 errorlist_mutex = SDL_CreateMutex(); |
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233 samplelist_mutex = SDL_CreateMutex(); |
226
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234 |
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235 for (i = 0; decoders[i].funcs != NULL; i++) |
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236 { |
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237 decoders[i].available = decoders[i].funcs->init(); |
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238 if (decoders[i].available) |
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239 { |
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240 available_decoders[pos] = &(decoders[i].funcs->info); |
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241 pos++; |
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242 } /* if */ |
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243 } /* for */ |
4 | 244 |
48
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245 available_decoders[pos] = NULL; |
26
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246 |
4 | 247 initialized = 1; |
248 return(1); | |
249 } /* Sound_Init */ | |
250 | |
251 | |
252 int Sound_Quit(void) | |
253 { | |
219
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254 ErrMsg *err; |
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255 ErrMsg *nexterr = NULL; |
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256 size_t i; |
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257 |
4 | 258 BAIL_IF_MACRO(!initialized, ERR_NOT_INITIALIZED, 0); |
259 | |
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260 while (((volatile Sound_Sample *) sample_list) != NULL) |
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261 Sound_FreeSample(sample_list); |
4 | 262 |
237
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263 initialized = 0; |
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264 |
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265 SDL_DestroyMutex(samplelist_mutex); |
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266 samplelist_mutex = NULL; |
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267 sample_list = NULL; |
219
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268 |
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269 for (i = 0; decoders[i].funcs != NULL; i++) |
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270 { |
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271 if (decoders[i].available) |
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272 { |
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273 decoders[i].funcs->quit(); |
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274 decoders[i].available = 0; |
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275 } /* if */ |
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276 } /* for */ |
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277 |
4 | 278 if (available_decoders != NULL) |
80
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279 free((void *) available_decoders); |
4 | 280 available_decoders = NULL; |
281 | |
219
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282 /* clean up error state for each thread... */ |
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283 SDL_LockMutex(errorlist_mutex); |
237
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284 for (err = error_msgs; err != NULL; err = nexterr) |
219
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285 { |
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286 nexterr = err->next; |
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287 free(err); |
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288 } /* for */ |
237
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289 error_msgs = NULL; |
219
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290 SDL_UnlockMutex(errorlist_mutex); |
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291 SDL_DestroyMutex(errorlist_mutex); |
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292 errorlist_mutex = NULL; |
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293 |
4 | 294 return(1); |
295 } /* Sound_Quit */ | |
296 | |
297 | |
298 const Sound_DecoderInfo **Sound_AvailableDecoders(void) | |
299 { | |
300 return(available_decoders); /* READ. ONLY. */ | |
301 } /* Sound_AvailableDecoders */ | |
302 | |
303 | |
219
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304 static ErrMsg *findErrorForCurrentThread(void) |
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305 { |
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306 ErrMsg *i; |
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307 Uint32 tid; |
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308 |
237
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309 if (error_msgs != NULL) |
219
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310 { |
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311 tid = SDL_ThreadID(); |
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312 |
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313 SDL_LockMutex(errorlist_mutex); |
237
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314 for (i = error_msgs; i != NULL; i = i->next) |
219
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315 { |
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316 if (i->tid == tid) |
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317 { |
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318 SDL_UnlockMutex(errorlist_mutex); |
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319 return(i); |
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320 } /* if */ |
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321 } /* for */ |
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322 SDL_UnlockMutex(errorlist_mutex); |
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323 } /* if */ |
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324 |
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325 return(NULL); /* no error available. */ |
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326 } /* findErrorForCurrentThread */ |
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327 |
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328 |
4 | 329 const char *Sound_GetError(void) |
330 { | |
219
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331 const char *retval = NULL; |
226
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332 ErrMsg *err; |
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333 |
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334 if (!initialized) |
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335 return(ERR_NOT_INITIALIZED); |
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336 |
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337 err = findErrorForCurrentThread(); |
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338 if ((err != NULL) && (err->error_available)) |
219
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339 { |
237
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340 retval = err->error_string; |
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341 err->error_available = 0; |
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342 } /* if */ |
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343 |
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344 return(retval); |
4 | 345 } /* Sound_GetError */ |
346 | |
347 | |
348 void Sound_ClearError(void) | |
349 { | |
226
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350 ErrMsg *err; |
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351 |
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352 if (!initialized) |
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353 return; |
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354 |
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355 err = findErrorForCurrentThread(); |
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356 if (err != NULL) |
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357 err->error_available = 0; |
4 | 358 } /* Sound_ClearError */ |
359 | |
360 | |
361 /* | |
362 * This is declared in the internal header. | |
363 */ | |
306
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364 void __Sound_SetError(const char *str) |
4 | 365 { |
219
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366 ErrMsg *err; |
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367 |
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368 if (str == NULL) |
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369 return; |
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370 |
387
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371 SNDDBG(("__Sound_SetError(\"%s\");%s\n", str, |
226
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372 (initialized) ? "" : " [NOT INITIALIZED!]")); |
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373 |
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374 if (!initialized) |
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375 return; |
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376 |
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377 err = findErrorForCurrentThread(); |
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378 if (err == NULL) |
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379 { |
219
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380 err = (ErrMsg *) malloc(sizeof (ErrMsg)); |
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381 if (err == NULL) |
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382 return; /* uhh...? */ |
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383 |
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384 memset((void *) err, '\0', sizeof (ErrMsg)); |
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385 err->tid = SDL_ThreadID(); |
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386 |
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387 SDL_LockMutex(errorlist_mutex); |
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388 err->next = error_msgs; |
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389 error_msgs = err; |
219
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390 SDL_UnlockMutex(errorlist_mutex); |
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391 } /* if */ |
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392 |
237
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393 err->error_available = 1; |
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394 strncpy(err->error_string, str, sizeof (err->error_string)); |
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395 err->error_string[sizeof (err->error_string) - 1] = '\0'; |
306
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396 } /* __Sound_SetError */ |
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397 |
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398 |
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399 Uint32 __Sound_convertMsToBytePos(Sound_AudioInfo *info, Uint32 ms) |
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400 { |
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401 /* "frames" == "sample frames" */ |
441
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402 float frames_per_ms = ((float) info->rate) / 1000.0f; |
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403 Uint32 frame_offset = (Uint32) (frames_per_ms * ((float) ms)); |
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404 Uint32 frame_size = (Uint32) ((info->format & 0xFF) / 8) * info->channels; |
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405 return(frame_offset * frame_size); |
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406 } /* __Sound_convertMsToBytePos */ |
4 | 407 |
408 | |
409 /* | |
410 * -ansi and -pedantic flags prevent use of strcasecmp() on Linux, and | |
411 * I honestly don't want to mess around with figuring out if a given | |
412 * platform has "strcasecmp", "stricmp", or | |
413 * "compare_two_damned_strings_case_insensitive", which I hear is in the | |
414 * next release of Carbon. :) This is exported so decoders may use it if | |
415 * they like. | |
416 */ | |
417 int __Sound_strcasecmp(const char *x, const char *y) | |
418 { | |
419 int ux, uy; | |
420 | |
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421 if (x == y) /* same pointer? Both NULL? */ |
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422 return(0); |
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423 |
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424 if (x == NULL) |
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425 return(-1); |
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426 |
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427 if (y == NULL) |
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428 return(1); |
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429 |
4 | 430 do |
431 { | |
432 ux = toupper((int) *x); | |
433 uy = toupper((int) *y); | |
434 if (ux > uy) | |
435 return(1); | |
436 else if (ux < uy) | |
437 return(-1); | |
438 x++; | |
439 y++; | |
440 } while ((ux) && (uy)); | |
441 | |
442 return(0); | |
443 } /* __Sound_strcasecmp */ | |
444 | |
445 | |
446 /* | |
447 * Allocate a Sound_Sample, and fill in most of its fields. Those that need | |
448 * to be filled in later, by a decoder, will be initialized to zero. | |
449 */ | |
450 static Sound_Sample *alloc_sample(SDL_RWops *rw, Sound_AudioInfo *desired, | |
451 Uint32 bufferSize) | |
452 { | |
453 Sound_Sample *retval = malloc(sizeof (Sound_Sample)); | |
454 Sound_SampleInternal *internal = malloc(sizeof (Sound_SampleInternal)); | |
455 if ((retval == NULL) || (internal == NULL)) | |
456 { | |
387
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457 __Sound_SetError(ERR_OUT_OF_MEMORY); |
4 | 458 if (retval) |
459 free(retval); | |
460 if (internal) | |
461 free(internal); | |
462 | |
463 return(NULL); | |
464 } /* if */ | |
465 | |
466 memset(retval, '\0', sizeof (Sound_Sample)); | |
467 memset(internal, '\0', sizeof (Sound_SampleInternal)); | |
468 | |
469 assert(bufferSize > 0); | |
470 retval->buffer = malloc(bufferSize); /* pure ugly. */ | |
471 if (!retval->buffer) | |
472 { | |
387
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473 __Sound_SetError(ERR_OUT_OF_MEMORY); |
4 | 474 free(internal); |
475 free(retval); | |
476 return(NULL); | |
477 } /* if */ | |
478 memset(retval->buffer, '\0', bufferSize); | |
479 retval->buffer_size = bufferSize; | |
480 | |
481 if (desired != NULL) | |
482 memcpy(&retval->desired, desired, sizeof (Sound_AudioInfo)); | |
483 | |
484 internal->rw = rw; | |
485 retval->opaque = internal; | |
486 return(retval); | |
487 } /* alloc_sample */ | |
488 | |
489 | |
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490 #if (defined DEBUG_CHATTER) |
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491 static __inline__ const char *fmt_to_str(Uint16 fmt) |
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492 { |
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493 switch(fmt) |
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494 { |
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495 case AUDIO_U8: |
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496 return("U8"); |
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497 case AUDIO_S8: |
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498 return("S8"); |
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499 case AUDIO_U16LSB: |
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500 return("U16LSB"); |
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501 case AUDIO_S16LSB: |
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502 return("S16LSB"); |
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503 case AUDIO_U16MSB: |
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504 return("U16MSB"); |
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505 case AUDIO_S16MSB: |
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506 return("S16MSB"); |
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507 } /* switch */ |
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508 |
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509 return("Unknown"); |
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510 } /* fmt_to_str */ |
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511 #endif |
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512 |
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513 |
4 | 514 /* |
515 * The bulk of the Sound_NewSample() work is done here... | |
516 * Ask the specified decoder to handle the data in (rw), and if | |
517 * so, construct the Sound_Sample. Otherwise, try to wind (rw)'s stream | |
518 * back to where it was, and return false. | |
519 */ | |
520 static int init_sample(const Sound_DecoderFunctions *funcs, | |
521 Sound_Sample *sample, const char *ext, | |
522 Sound_AudioInfo *_desired) | |
523 { | |
524 Sound_SampleInternal *internal = (Sound_SampleInternal *) sample->opaque; | |
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525 Sound_AudioInfo desired; |
400 | 526 int pos = SDL_RWtell(internal->rw); |
4 | 527 |
528 /* fill in the funcs for this decoder... */ | |
529 sample->decoder = &funcs->info; | |
530 internal->funcs = funcs; | |
531 if (!funcs->open(sample, ext)) | |
532 { | |
533 SDL_RWseek(internal->rw, pos, SEEK_SET); /* set for next try... */ | |
534 return(0); | |
535 } /* if */ | |
536 | |
537 /* success; we've got a decoder! */ | |
538 | |
539 /* Now we need to set up the conversion buffer... */ | |
540 | |
541 memcpy(&desired, (_desired != NULL) ? _desired : &sample->actual, | |
542 sizeof (Sound_AudioInfo)); | |
543 | |
340
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544 if (desired.format == 0) |
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545 desired.format = sample->actual.format; |
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546 if (desired.channels == 0) |
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547 desired.channels = sample->actual.channels; |
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548 if (desired.rate == 0) |
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549 desired.rate = sample->actual.rate; |
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550 |
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551 if (Sound_BuildAudioCVT(&internal->sdlcvt, |
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552 sample->actual.format, |
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553 sample->actual.channels, |
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554 sample->actual.rate, |
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555 desired.format, |
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556 desired.channels, |
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557 desired.rate, |
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558 sample->buffer_size) == -1) |
4 | 559 { |
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560 __Sound_SetError(SDL_GetError()); |
4 | 561 funcs->close(sample); |
562 SDL_RWseek(internal->rw, pos, SEEK_SET); /* set for next try... */ | |
563 return(0); | |
564 } /* if */ | |
565 | |
566 if (internal->sdlcvt.len_mult > 1) | |
567 { | |
568 void *rc = realloc(sample->buffer, | |
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569 sample->buffer_size * internal->sdlcvt.len_mult); |
4 | 570 if (rc == NULL) |
571 { | |
572 funcs->close(sample); | |
573 SDL_RWseek(internal->rw, pos, SEEK_SET); /* set for next try... */ | |
574 return(0); | |
575 } /* if */ | |
576 | |
577 sample->buffer = rc; | |
578 } /* if */ | |
579 | |
580 /* these pointers are all one and the same. */ | |
581 memcpy(&sample->desired, &desired, sizeof (Sound_AudioInfo)); | |
582 internal->sdlcvt.buf = internal->buffer = sample->buffer; | |
583 internal->buffer_size = sample->buffer_size / internal->sdlcvt.len_mult; | |
584 internal->sdlcvt.len = internal->buffer_size; | |
585 | |
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586 /* Prepend our new Sound_Sample to the sample_list... */ |
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587 SDL_LockMutex(samplelist_mutex); |
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588 internal->next = sample_list; |
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589 if (sample_list != NULL) |
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590 ((Sound_SampleInternal *) sample_list->opaque)->prev = sample; |
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591 sample_list = sample; |
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592 SDL_UnlockMutex(samplelist_mutex); |
4 | 593 |
62
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594 SNDDBG(("New sample DESIRED format: %s format, %d rate, %d channels.\n", |
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595 fmt_to_str(sample->desired.format), |
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596 sample->desired.rate, |
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597 sample->desired.channels)); |
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598 |
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599 SNDDBG(("New sample ACTUAL format: %s format, %d rate, %d channels.\n", |
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600 fmt_to_str(sample->actual.format), |
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601 sample->actual.rate, |
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602 sample->actual.channels)); |
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603 |
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604 SNDDBG(("On-the-fly conversion: %s.\n", |
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605 internal->sdlcvt.needed ? "ENABLED" : "DISABLED")); |
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606 |
4 | 607 return(1); |
608 } /* init_sample */ | |
609 | |
610 | |
611 Sound_Sample *Sound_NewSample(SDL_RWops *rw, const char *ext, | |
612 Sound_AudioInfo *desired, Uint32 bSize) | |
613 { | |
614 Sound_Sample *retval; | |
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615 decoder_element *decoder; |
4 | 616 |
617 /* sanity checks. */ | |
618 BAIL_IF_MACRO(!initialized, ERR_NOT_INITIALIZED, NULL); | |
619 BAIL_IF_MACRO(rw == NULL, ERR_INVALID_ARGUMENT, NULL); | |
620 | |
621 retval = alloc_sample(rw, desired, bSize); | |
622 if (!retval) | |
623 return(NULL); /* alloc_sample() sets error message... */ | |
624 | |
625 if (ext != NULL) | |
626 { | |
149
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627 for (decoder = &decoders[0]; decoder->funcs != NULL; decoder++) |
4 | 628 { |
149
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629 if (decoder->available) |
4 | 630 { |
149
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631 const char **decoderExt = decoder->funcs->info.extensions; |
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632 while (*decoderExt) |
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633 { |
149
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634 if (__Sound_strcasecmp(*decoderExt, ext) == 0) |
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635 { |
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636 if (init_sample(decoder->funcs, retval, ext, desired)) |
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637 return(retval); |
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638 break; /* done with this decoder either way. */ |
149
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639 } /* if */ |
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640 decoderExt++; |
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641 } /* while */ |
4 | 642 } /* if */ |
643 } /* for */ | |
644 } /* if */ | |
645 | |
646 /* no direct extension match? Try everything we've got... */ | |
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647 for (decoder = &decoders[0]; decoder->funcs != NULL; decoder++) |
4 | 648 { |
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649 if (decoder->available) |
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650 { |
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651 int should_try = 1; |
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652 const char **decoderExt = decoder->funcs->info.extensions; |
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653 |
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654 /* skip if we would have tried decoder above... */ |
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655 while (*decoderExt) |
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656 { |
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657 if (__Sound_strcasecmp(*decoderExt, ext) == 0) |
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658 { |
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659 should_try = 0; |
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660 break; |
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661 } /* if */ |
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662 decoderExt++; |
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663 } /* while */ |
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664 |
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665 if (should_try) |
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666 { |
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667 if (init_sample(decoder->funcs, retval, ext, desired)) |
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668 return(retval); |
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669 } /* if */ |
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670 } /* if */ |
4 | 671 } /* for */ |
672 | |
673 /* nothing could handle the sound data... */ | |
674 free(retval->opaque); | |
675 if (retval->buffer != NULL) | |
676 free(retval->buffer); | |
677 free(retval); | |
678 SDL_RWclose(rw); | |
387
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679 __Sound_SetError(ERR_UNSUPPORTED_FORMAT); |
4 | 680 return(NULL); |
681 } /* Sound_NewSample */ | |
682 | |
683 | |
684 Sound_Sample *Sound_NewSampleFromFile(const char *filename, | |
685 Sound_AudioInfo *desired, | |
686 Uint32 bufferSize) | |
687 { | |
688 const char *ext; | |
689 SDL_RWops *rw; | |
690 | |
691 BAIL_IF_MACRO(!initialized, ERR_NOT_INITIALIZED, NULL); | |
692 BAIL_IF_MACRO(filename == NULL, ERR_INVALID_ARGUMENT, NULL); | |
693 | |
694 ext = strrchr(filename, '.'); | |
695 rw = SDL_RWFromFile(filename, "rb"); | |
696 BAIL_IF_MACRO(rw == NULL, SDL_GetError(), NULL); | |
697 | |
698 if (ext != NULL) | |
699 ext++; | |
700 | |
701 return(Sound_NewSample(rw, ext, desired, bufferSize)); | |
702 } /* Sound_NewSampleFromFile */ | |
703 | |
704 | |
705 void Sound_FreeSample(Sound_Sample *sample) | |
706 { | |
707 Sound_SampleInternal *internal; | |
708 | |
709 if (!initialized) | |
710 { | |
387
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711 __Sound_SetError(ERR_NOT_INITIALIZED); |
4 | 712 return; |
713 } /* if */ | |
714 | |
715 if (sample == NULL) | |
716 { | |
387
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717 __Sound_SetError(ERR_INVALID_ARGUMENT); |
4 | 718 return; |
719 } /* if */ | |
720 | |
721 internal = (Sound_SampleInternal *) sample->opaque; | |
722 | |
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723 SDL_LockMutex(samplelist_mutex); |
4 | 724 |
237
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725 /* update the sample_list... */ |
4 | 726 if (internal->prev != NULL) |
727 { | |
728 Sound_SampleInternal *prevInternal; | |
729 prevInternal = (Sound_SampleInternal *) internal->prev->opaque; | |
730 prevInternal->next = internal->next; | |
731 } /* if */ | |
732 else | |
733 { | |
237
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734 assert(sample_list == sample); |
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735 sample_list = internal->next; |
4 | 736 } /* else */ |
737 | |
738 if (internal->next != NULL) | |
739 { | |
740 Sound_SampleInternal *nextInternal; | |
741 nextInternal = (Sound_SampleInternal *) internal->next->opaque; | |
742 nextInternal->prev = internal->prev; | |
743 } /* if */ | |
744 | |
237
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745 SDL_UnlockMutex(samplelist_mutex); |
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746 |
4 | 747 /* nuke it... */ |
237
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748 internal->funcs->close(sample); |
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749 |
4 | 750 if (internal->rw != NULL) /* this condition is a "just in case" thing. */ |
751 SDL_RWclose(internal->rw); | |
167
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752 |
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753 if ((internal->buffer != NULL) && (internal->buffer != sample->buffer)) |
4 | 754 free(internal->buffer); |
167
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755 |
4 | 756 free(internal); |
167
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757 |
4 | 758 if (sample->buffer != NULL) |
759 free(sample->buffer); | |
167
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760 |
4 | 761 free(sample); |
762 } /* Sound_FreeSample */ | |
763 | |
764 | |
765 int Sound_SetBufferSize(Sound_Sample *sample, Uint32 newSize) | |
766 { | |
767 void *newBuf = NULL; | |
768 Sound_SampleInternal *internal = NULL; | |
769 | |
770 BAIL_IF_MACRO(!initialized, ERR_NOT_INITIALIZED, 0); | |
771 BAIL_IF_MACRO(sample == NULL, ERR_INVALID_ARGUMENT, 0); | |
772 internal = ((Sound_SampleInternal *) sample->opaque); | |
773 newBuf = realloc(sample->buffer, newSize * internal->sdlcvt.len_mult); | |
774 BAIL_IF_MACRO(newBuf == NULL, ERR_OUT_OF_MEMORY, 0); | |
775 | |
776 internal->sdlcvt.buf = internal->buffer = sample->buffer = newBuf; | |
777 sample->buffer_size = newSize; | |
778 internal->buffer_size = newSize / internal->sdlcvt.len_mult; | |
779 internal->sdlcvt.len = internal->buffer_size; | |
780 | |
781 return(1); | |
782 } /* Sound_SetBufferSize */ | |
783 | |
784 | |
785 Uint32 Sound_Decode(Sound_Sample *sample) | |
786 { | |
787 Sound_SampleInternal *internal = NULL; | |
788 Uint32 retval = 0; | |
789 | |
790 /* a boatload of sanity checks... */ | |
791 BAIL_IF_MACRO(!initialized, ERR_NOT_INITIALIZED, 0); | |
792 BAIL_IF_MACRO(sample == NULL, ERR_INVALID_ARGUMENT, 0); | |
793 BAIL_IF_MACRO(sample->flags & SOUND_SAMPLEFLAG_ERROR, ERR_PREV_ERROR, 0); | |
794 BAIL_IF_MACRO(sample->flags & SOUND_SAMPLEFLAG_EOF, ERR_PREV_EOF, 0); | |
795 | |
796 internal = (Sound_SampleInternal *) sample->opaque; | |
797 | |
798 assert(sample->buffer != NULL); | |
799 assert(sample->buffer_size > 0); | |
800 assert(internal->buffer != NULL); | |
801 assert(internal->buffer_size > 0); | |
802 | |
803 /* reset EAGAIN. Decoder can flip it back on if it needs to. */ | |
311
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804 sample->flags &= ~SOUND_SAMPLEFLAG_EAGAIN; |
4 | 805 retval = internal->funcs->read(sample); |
37
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806 |
163
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807 if (retval > 0 && internal->sdlcvt.needed) |
4 | 808 { |
809 internal->sdlcvt.len = retval; | |
143
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810 Sound_ConvertAudio(&internal->sdlcvt); |
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811 retval = internal->sdlcvt.len_cvt; |
4 | 812 } /* if */ |
813 | |
814 return(retval); | |
815 } /* Sound_Decode */ | |
816 | |
817 | |
818 Uint32 Sound_DecodeAll(Sound_Sample *sample) | |
819 { | |
820 Sound_SampleInternal *internal = NULL; | |
821 void *buf = NULL; | |
822 Uint32 newBufSize = 0; | |
823 | |
824 BAIL_IF_MACRO(!initialized, ERR_NOT_INITIALIZED, 0); | |
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825 BAIL_IF_MACRO(sample->flags & SOUND_SAMPLEFLAG_EOF, ERR_PREV_EOF, 0); |
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826 BAIL_IF_MACRO(sample->flags & SOUND_SAMPLEFLAG_ERROR, ERR_PREV_ERROR, 0); |
4 | 827 |
828 internal = (Sound_SampleInternal *) sample->opaque; | |
829 | |
830 while ( ((sample->flags & SOUND_SAMPLEFLAG_EOF) == 0) && | |
831 ((sample->flags & SOUND_SAMPLEFLAG_ERROR) == 0) ) | |
832 { | |
172
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833 Uint32 br = Sound_Decode(sample); |
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834 void *ptr = realloc(buf, newBufSize + br); |
4 | 835 if (ptr == NULL) |
836 { | |
837 sample->flags |= SOUND_SAMPLEFLAG_ERROR; | |
387
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838 __Sound_SetError(ERR_OUT_OF_MEMORY); |
4 | 839 } /* if */ |
840 else | |
841 { | |
167
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842 buf = ptr; |
4 | 843 memcpy( ((char *) buf) + newBufSize, sample->buffer, br ); |
844 newBufSize += br; | |
845 } /* else */ | |
846 } /* while */ | |
847 | |
172
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848 if (buf == NULL) /* ...in case first call to realloc() fails... */ |
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849 return(sample->buffer_size); |
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850 |
167
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851 if (internal->buffer != sample->buffer) |
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852 free(internal->buffer); |
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853 |
4 | 854 free(sample->buffer); |
167
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855 |
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856 internal->sdlcvt.buf = internal->buffer = sample->buffer = buf; |
4 | 857 sample->buffer_size = newBufSize; |
858 internal->buffer_size = newBufSize / internal->sdlcvt.len_mult; | |
167
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859 internal->sdlcvt.len = internal->buffer_size; |
4 | 860 |
861 return(newBufSize); | |
862 } /* Sound_DecodeAll */ | |
863 | |
223
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864 |
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865 int Sound_Rewind(Sound_Sample *sample) |
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866 { |
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867 Sound_SampleInternal *internal; |
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868 BAIL_IF_MACRO(!initialized, ERR_NOT_INITIALIZED, 0); |
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869 |
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870 internal = (Sound_SampleInternal *) sample->opaque; |
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871 if (!internal->funcs->rewind(sample)) |
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872 { |
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873 sample->flags |= SOUND_SAMPLEFLAG_ERROR; |
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874 return(0); |
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875 } /* if */ |
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876 |
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877 sample->flags &= ~SOUND_SAMPLEFLAG_EAGAIN; |
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878 sample->flags &= ~SOUND_SAMPLEFLAG_ERROR; |
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879 sample->flags &= ~SOUND_SAMPLEFLAG_EOF; |
306
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880 |
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881 return(1); |
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882 } /* Sound_Rewind */ |
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883 |
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884 |
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885 int Sound_Seek(Sound_Sample *sample, Uint32 ms) |
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886 { |
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887 Sound_SampleInternal *internal; |
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888 |
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889 BAIL_IF_MACRO(!initialized, ERR_NOT_INITIALIZED, 0); |
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890 if (!(sample->flags & SOUND_SAMPLEFLAG_CANSEEK)) |
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891 BAIL_MACRO(ERR_CANNOT_SEEK, 0); |
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892 |
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893 internal = (Sound_SampleInternal *) sample->opaque; |
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894 BAIL_IF_MACRO(!internal->funcs->seek(sample, ms), NULL, 0); |
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895 |
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896 sample->flags &= ~SOUND_SAMPLEFLAG_EAGAIN; |
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897 sample->flags &= ~SOUND_SAMPLEFLAG_ERROR; |
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898 sample->flags &= ~SOUND_SAMPLEFLAG_EOF; |
306
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899 |
223
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900 return(1); |
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901 } /* Sound_Rewind */ |
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902 |
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903 |
4 | 904 /* end of SDL_sound.c ... */ |
905 |