Mercurial > SDL_sound_CoreAudio
annotate decoders/au.c @ 377:cbb15ecf423a
WinCE (PocketPC) patches from Tyler.
| author | Ryan C. Gordon <icculus@icculus.org> |
|---|---|
| date | Tue, 02 Jul 2002 03:58:24 +0000 |
| parents | e683cb99f88f |
| children | fb519e6028e3 |
| rev | line source |
|---|---|
| 213 | 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 * Sun/NeXT .au decoder for SDL_sound. | |
| 22 * Formats supported: 8 and 16 bit linear PCM, 8 bit µ-law. | |
| 23 * Files without valid header are assumed to be 8 bit µ-law, 8kHz, mono. | |
| 24 * | |
| 25 * Please see the file COPYING in the source's root directory. | |
| 26 * | |
| 27 * This file written by Mattias Engdegård. (f91-men@nada.kth.se) | |
| 28 */ | |
| 29 | |
| 30 #if HAVE_CONFIG_H | |
| 31 # include <config.h> | |
| 32 #endif | |
| 33 | |
| 34 #ifdef SOUND_SUPPORTS_AU | |
| 35 | |
| 36 #include <stdio.h> | |
| 37 #include <stdlib.h> | |
| 38 #include <string.h> | |
| 39 | |
| 40 #include "SDL_sound.h" | |
| 41 | |
| 42 #define __SDL_SOUND_INTERNAL__ | |
| 43 #include "SDL_sound_internal.h" | |
| 44 | |
| 45 static int AU_init(void); | |
| 46 static void AU_quit(void); | |
| 47 static int AU_open(Sound_Sample *sample, const char *ext); | |
| 48 static void AU_close(Sound_Sample *sample); | |
| 49 static Uint32 AU_read(Sound_Sample *sample); | |
|
221
c9772a9f5271
Initial implementation or stubs for rewind method. Other cleanups.
Ryan C. Gordon <icculus@icculus.org>
parents:
217
diff
changeset
|
50 static int AU_rewind(Sound_Sample *sample); |
|
306
c97be6e1bd27
Added framework for Sound_Seek() support.
Ryan C. Gordon <icculus@icculus.org>
parents:
294
diff
changeset
|
51 static int AU_seek(Sound_Sample *sample, Uint32 ms); |
| 213 | 52 |
| 53 /* | |
| 54 * Sometimes the extension ".snd" is used for these files (mostly on the NeXT), | |
| 55 * and the magic number comes from this. However it may clash with other | |
| 56 * formats and is somewhat of an anachronism, so only .au is used here. | |
| 57 */ | |
| 58 static const char *extensions_au[] = { "AU", NULL }; | |
| 59 const Sound_DecoderFunctions __Sound_DecoderFunctions_AU = | |
| 60 { | |
| 61 { | |
| 62 extensions_au, | |
| 63 "Sun/NeXT audio file format", | |
| 64 "Mattias Engdegård <f91-men@nada.kth.se>", | |
| 65 "http://www.icculus.org/SDL_sound/" | |
| 66 }, | |
| 67 | |
|
221
c9772a9f5271
Initial implementation or stubs for rewind method. Other cleanups.
Ryan C. Gordon <icculus@icculus.org>
parents:
217
diff
changeset
|
68 AU_init, /* init() method */ |
|
c9772a9f5271
Initial implementation or stubs for rewind method. Other cleanups.
Ryan C. Gordon <icculus@icculus.org>
parents:
217
diff
changeset
|
69 AU_quit, /* quit() method */ |
|
c9772a9f5271
Initial implementation or stubs for rewind method. Other cleanups.
Ryan C. Gordon <icculus@icculus.org>
parents:
217
diff
changeset
|
70 AU_open, /* open() method */ |
|
c9772a9f5271
Initial implementation or stubs for rewind method. Other cleanups.
Ryan C. Gordon <icculus@icculus.org>
parents:
217
diff
changeset
|
71 AU_close, /* close() method */ |
|
c9772a9f5271
Initial implementation or stubs for rewind method. Other cleanups.
Ryan C. Gordon <icculus@icculus.org>
parents:
217
diff
changeset
|
72 AU_read, /* read() method */ |
|
306
c97be6e1bd27
Added framework for Sound_Seek() support.
Ryan C. Gordon <icculus@icculus.org>
parents:
294
diff
changeset
|
73 AU_rewind, /* rewind() method */ |
|
c97be6e1bd27
Added framework for Sound_Seek() support.
Ryan C. Gordon <icculus@icculus.org>
parents:
294
diff
changeset
|
74 AU_seek /* seek() method */ |
| 213 | 75 }; |
| 76 | |
| 77 /* no init/deinit needed */ | |
| 78 static int AU_init(void) | |
| 79 { | |
| 80 return(1); | |
|
217
9bab949e2318
Fixed memory leak I introduced, mangled coding style some more. :)
Ryan C. Gordon <icculus@icculus.org>
parents:
213
diff
changeset
|
81 } /* AU_init */ |
| 213 | 82 |
| 83 static void AU_quit(void) | |
| 84 { | |
| 85 /* no-op. */ | |
|
217
9bab949e2318
Fixed memory leak I introduced, mangled coding style some more. :)
Ryan C. Gordon <icculus@icculus.org>
parents:
213
diff
changeset
|
86 } /* AU_quit */ |
| 213 | 87 |
| 88 struct au_file_hdr | |
| 89 { | |
| 90 Uint32 magic; | |
| 91 Uint32 hdr_size; | |
| 92 Uint32 data_size; | |
| 93 Uint32 encoding; | |
| 94 Uint32 sample_rate; | |
| 95 Uint32 channels; | |
| 96 }; | |
| 97 | |
| 98 #define HDR_SIZE 24 | |
| 99 | |
| 100 enum | |
| 101 { | |
| 102 AU_ENC_ULAW_8 = 1, /* 8-bit ISDN µ-law */ | |
| 103 AU_ENC_LINEAR_8 = 2, /* 8-bit linear PCM */ | |
| 104 AU_ENC_LINEAR_16 = 3, /* 16-bit linear PCM */ | |
| 105 | |
| 106 /* the rest are unsupported (I have never seen them in the wild) */ | |
| 107 AU_ENC_LINEAR_24 = 4, /* 24-bit linear PCM */ | |
| 108 AU_ENC_LINEAR_32 = 5, /* 32-bit linear PCM */ | |
| 109 AU_ENC_FLOAT = 6, /* 32-bit IEEE floating point */ | |
| 110 AU_ENC_DOUBLE = 7, /* 64-bit IEEE floating point */ | |
| 111 /* more Sun formats, not supported either */ | |
| 112 AU_ENC_ADPCM_G721 = 23, | |
| 113 AU_ENC_ADPCM_G722 = 24, | |
| 114 AU_ENC_ADPCM_G723_3 = 25, | |
| 115 AU_ENC_ADPCM_G723_5 = 26, | |
| 116 AU_ENC_ALAW_8 = 27 | |
| 117 }; | |
| 118 | |
| 119 struct audec | |
| 120 { | |
|
221
c9772a9f5271
Initial implementation or stubs for rewind method. Other cleanups.
Ryan C. Gordon <icculus@icculus.org>
parents:
217
diff
changeset
|
121 Uint32 total; |
|
c9772a9f5271
Initial implementation or stubs for rewind method. Other cleanups.
Ryan C. Gordon <icculus@icculus.org>
parents:
217
diff
changeset
|
122 Uint32 remaining; |
|
c9772a9f5271
Initial implementation or stubs for rewind method. Other cleanups.
Ryan C. Gordon <icculus@icculus.org>
parents:
217
diff
changeset
|
123 Uint32 start_offset; |
| 213 | 124 int encoding; |
| 125 }; | |
| 126 | |
| 127 | |
|
330
a81976ed5df7
Cleanups for robustness, potentially buggy seek method implementation.
Ryan C. Gordon <icculus@icculus.org>
parents:
306
diff
changeset
|
128 /* |
|
a81976ed5df7
Cleanups for robustness, potentially buggy seek method implementation.
Ryan C. Gordon <icculus@icculus.org>
parents:
306
diff
changeset
|
129 * Read in the AU header from disk. This makes this process safe |
|
a81976ed5df7
Cleanups for robustness, potentially buggy seek method implementation.
Ryan C. Gordon <icculus@icculus.org>
parents:
306
diff
changeset
|
130 * regardless of the processor's byte order or how the au_file_hdr |
|
a81976ed5df7
Cleanups for robustness, potentially buggy seek method implementation.
Ryan C. Gordon <icculus@icculus.org>
parents:
306
diff
changeset
|
131 * structure is packed. |
|
a81976ed5df7
Cleanups for robustness, potentially buggy seek method implementation.
Ryan C. Gordon <icculus@icculus.org>
parents:
306
diff
changeset
|
132 */ |
|
a81976ed5df7
Cleanups for robustness, potentially buggy seek method implementation.
Ryan C. Gordon <icculus@icculus.org>
parents:
306
diff
changeset
|
133 static int read_au_header(SDL_RWops *rw, struct au_file_hdr *hdr) |
|
a81976ed5df7
Cleanups for robustness, potentially buggy seek method implementation.
Ryan C. Gordon <icculus@icculus.org>
parents:
306
diff
changeset
|
134 { |
|
a81976ed5df7
Cleanups for robustness, potentially buggy seek method implementation.
Ryan C. Gordon <icculus@icculus.org>
parents:
306
diff
changeset
|
135 if (SDL_RWread(rw, &hdr->magic, sizeof (hdr->magic), 1) != 1) |
|
a81976ed5df7
Cleanups for robustness, potentially buggy seek method implementation.
Ryan C. Gordon <icculus@icculus.org>
parents:
306
diff
changeset
|
136 return(0); |
|
a81976ed5df7
Cleanups for robustness, potentially buggy seek method implementation.
Ryan C. Gordon <icculus@icculus.org>
parents:
306
diff
changeset
|
137 hdr->magic = SDL_SwapBE32(hdr->magic); |
|
a81976ed5df7
Cleanups for robustness, potentially buggy seek method implementation.
Ryan C. Gordon <icculus@icculus.org>
parents:
306
diff
changeset
|
138 |
|
a81976ed5df7
Cleanups for robustness, potentially buggy seek method implementation.
Ryan C. Gordon <icculus@icculus.org>
parents:
306
diff
changeset
|
139 if (SDL_RWread(rw, &hdr->hdr_size, sizeof (hdr->hdr_size), 1) != 1) |
|
a81976ed5df7
Cleanups for robustness, potentially buggy seek method implementation.
Ryan C. Gordon <icculus@icculus.org>
parents:
306
diff
changeset
|
140 return(0); |
|
a81976ed5df7
Cleanups for robustness, potentially buggy seek method implementation.
Ryan C. Gordon <icculus@icculus.org>
parents:
306
diff
changeset
|
141 hdr->hdr_size = SDL_SwapBE32(hdr->hdr_size); |
|
a81976ed5df7
Cleanups for robustness, potentially buggy seek method implementation.
Ryan C. Gordon <icculus@icculus.org>
parents:
306
diff
changeset
|
142 |
|
a81976ed5df7
Cleanups for robustness, potentially buggy seek method implementation.
Ryan C. Gordon <icculus@icculus.org>
parents:
306
diff
changeset
|
143 if (SDL_RWread(rw, &hdr->data_size, sizeof (hdr->data_size), 1) != 1) |
|
a81976ed5df7
Cleanups for robustness, potentially buggy seek method implementation.
Ryan C. Gordon <icculus@icculus.org>
parents:
306
diff
changeset
|
144 return(0); |
|
a81976ed5df7
Cleanups for robustness, potentially buggy seek method implementation.
Ryan C. Gordon <icculus@icculus.org>
parents:
306
diff
changeset
|
145 hdr->data_size = SDL_SwapBE32(hdr->data_size); |
|
a81976ed5df7
Cleanups for robustness, potentially buggy seek method implementation.
Ryan C. Gordon <icculus@icculus.org>
parents:
306
diff
changeset
|
146 |
|
a81976ed5df7
Cleanups for robustness, potentially buggy seek method implementation.
Ryan C. Gordon <icculus@icculus.org>
parents:
306
diff
changeset
|
147 if (SDL_RWread(rw, &hdr->encoding, sizeof (hdr->encoding), 1) != 1) |
|
a81976ed5df7
Cleanups for robustness, potentially buggy seek method implementation.
Ryan C. Gordon <icculus@icculus.org>
parents:
306
diff
changeset
|
148 return(0); |
|
a81976ed5df7
Cleanups for robustness, potentially buggy seek method implementation.
Ryan C. Gordon <icculus@icculus.org>
parents:
306
diff
changeset
|
149 hdr->encoding = SDL_SwapBE32(hdr->encoding); |
|
a81976ed5df7
Cleanups for robustness, potentially buggy seek method implementation.
Ryan C. Gordon <icculus@icculus.org>
parents:
306
diff
changeset
|
150 |
|
a81976ed5df7
Cleanups for robustness, potentially buggy seek method implementation.
Ryan C. Gordon <icculus@icculus.org>
parents:
306
diff
changeset
|
151 if (SDL_RWread(rw, &hdr->sample_rate, sizeof (hdr->sample_rate), 1) != 1) |
|
a81976ed5df7
Cleanups for robustness, potentially buggy seek method implementation.
Ryan C. Gordon <icculus@icculus.org>
parents:
306
diff
changeset
|
152 return(0); |
|
a81976ed5df7
Cleanups for robustness, potentially buggy seek method implementation.
Ryan C. Gordon <icculus@icculus.org>
parents:
306
diff
changeset
|
153 hdr->sample_rate = SDL_SwapBE32(hdr->sample_rate); |
|
a81976ed5df7
Cleanups for robustness, potentially buggy seek method implementation.
Ryan C. Gordon <icculus@icculus.org>
parents:
306
diff
changeset
|
154 |
|
a81976ed5df7
Cleanups for robustness, potentially buggy seek method implementation.
Ryan C. Gordon <icculus@icculus.org>
parents:
306
diff
changeset
|
155 if (SDL_RWread(rw, &hdr->channels, sizeof (hdr->channels), 1) != 1) |
|
a81976ed5df7
Cleanups for robustness, potentially buggy seek method implementation.
Ryan C. Gordon <icculus@icculus.org>
parents:
306
diff
changeset
|
156 return(0); |
|
a81976ed5df7
Cleanups for robustness, potentially buggy seek method implementation.
Ryan C. Gordon <icculus@icculus.org>
parents:
306
diff
changeset
|
157 hdr->channels = SDL_SwapBE32(hdr->channels); |
|
a81976ed5df7
Cleanups for robustness, potentially buggy seek method implementation.
Ryan C. Gordon <icculus@icculus.org>
parents:
306
diff
changeset
|
158 |
|
a81976ed5df7
Cleanups for robustness, potentially buggy seek method implementation.
Ryan C. Gordon <icculus@icculus.org>
parents:
306
diff
changeset
|
159 return(1); |
|
a81976ed5df7
Cleanups for robustness, potentially buggy seek method implementation.
Ryan C. Gordon <icculus@icculus.org>
parents:
306
diff
changeset
|
160 } /* read_au_header */ |
|
a81976ed5df7
Cleanups for robustness, potentially buggy seek method implementation.
Ryan C. Gordon <icculus@icculus.org>
parents:
306
diff
changeset
|
161 |
|
a81976ed5df7
Cleanups for robustness, potentially buggy seek method implementation.
Ryan C. Gordon <icculus@icculus.org>
parents:
306
diff
changeset
|
162 |
|
257
7c4f6ee02cd0
Changed magic number to be bigendian.
Ryan C. Gordon <icculus@icculus.org>
parents:
221
diff
changeset
|
163 #define AU_MAGIC 0x2E736E64 /* ".snd", in ASCII (bigendian number) */ |
| 213 | 164 |
| 165 static int AU_open(Sound_Sample *sample, const char *ext) | |
| 166 { | |
| 167 Sound_SampleInternal *internal = sample->opaque; | |
| 168 SDL_RWops *rw = internal->rw; | |
|
330
a81976ed5df7
Cleanups for robustness, potentially buggy seek method implementation.
Ryan C. Gordon <icculus@icculus.org>
parents:
306
diff
changeset
|
169 int skip, hsize, i; |
| 213 | 170 struct au_file_hdr hdr; |
|
330
a81976ed5df7
Cleanups for robustness, potentially buggy seek method implementation.
Ryan C. Gordon <icculus@icculus.org>
parents:
306
diff
changeset
|
171 struct audec *dec; |
| 213 | 172 char c; |
|
330
a81976ed5df7
Cleanups for robustness, potentially buggy seek method implementation.
Ryan C. Gordon <icculus@icculus.org>
parents:
306
diff
changeset
|
173 |
|
a81976ed5df7
Cleanups for robustness, potentially buggy seek method implementation.
Ryan C. Gordon <icculus@icculus.org>
parents:
306
diff
changeset
|
174 if (!read_au_header(rw, &hdr)) /* does byte order swapping. */ |
|
a81976ed5df7
Cleanups for robustness, potentially buggy seek method implementation.
Ryan C. Gordon <icculus@icculus.org>
parents:
306
diff
changeset
|
175 { |
|
a81976ed5df7
Cleanups for robustness, potentially buggy seek method implementation.
Ryan C. Gordon <icculus@icculus.org>
parents:
306
diff
changeset
|
176 Sound_SetError("AU: Not an .au file (bad header)"); |
|
a81976ed5df7
Cleanups for robustness, potentially buggy seek method implementation.
Ryan C. Gordon <icculus@icculus.org>
parents:
306
diff
changeset
|
177 return(0); |
|
a81976ed5df7
Cleanups for robustness, potentially buggy seek method implementation.
Ryan C. Gordon <icculus@icculus.org>
parents:
306
diff
changeset
|
178 } /* if */ |
|
a81976ed5df7
Cleanups for robustness, potentially buggy seek method implementation.
Ryan C. Gordon <icculus@icculus.org>
parents:
306
diff
changeset
|
179 |
|
a81976ed5df7
Cleanups for robustness, potentially buggy seek method implementation.
Ryan C. Gordon <icculus@icculus.org>
parents:
306
diff
changeset
|
180 dec = malloc(sizeof *dec); |
| 213 | 181 BAIL_IF_MACRO(dec == NULL, ERR_OUT_OF_MEMORY, 0); |
| 182 internal->decoder_private = dec; | |
| 183 | |
|
330
a81976ed5df7
Cleanups for robustness, potentially buggy seek method implementation.
Ryan C. Gordon <icculus@icculus.org>
parents:
306
diff
changeset
|
184 if (hdr.magic == AU_MAGIC) |
| 213 | 185 { |
| 186 /* valid magic */ | |
|
330
a81976ed5df7
Cleanups for robustness, potentially buggy seek method implementation.
Ryan C. Gordon <icculus@icculus.org>
parents:
306
diff
changeset
|
187 dec->encoding = hdr.encoding; |
| 213 | 188 switch(dec->encoding) |
| 189 { | |
| 190 case AU_ENC_ULAW_8: | |
| 191 /* Convert 8-bit µ-law to 16-bit linear on the fly. This is | |
| 192 slightly wasteful if the audio driver must convert them | |
| 193 back, but µ-law only devices are rare (mostly _old_ Suns) */ | |
| 194 sample->actual.format = AUDIO_S16SYS; | |
| 195 break; | |
| 196 | |
| 197 case AU_ENC_LINEAR_8: | |
| 198 sample->actual.format = AUDIO_S8; | |
| 199 break; | |
| 200 | |
| 201 case AU_ENC_LINEAR_16: | |
| 202 sample->actual.format = AUDIO_S16MSB; | |
| 203 break; | |
| 204 | |
| 205 default: | |
| 294 | 206 Sound_SetError("AU: Unsupported .au encoding"); |
| 213 | 207 free(dec); |
| 208 return 0; | |
|
217
9bab949e2318
Fixed memory leak I introduced, mangled coding style some more. :)
Ryan C. Gordon <icculus@icculus.org>
parents:
213
diff
changeset
|
209 } /* switch */ |
| 213 | 210 |
|
330
a81976ed5df7
Cleanups for robustness, potentially buggy seek method implementation.
Ryan C. Gordon <icculus@icculus.org>
parents:
306
diff
changeset
|
211 sample->actual.rate = hdr.sample_rate; |
|
a81976ed5df7
Cleanups for robustness, potentially buggy seek method implementation.
Ryan C. Gordon <icculus@icculus.org>
parents:
306
diff
changeset
|
212 sample->actual.channels = hdr.channels; |
|
a81976ed5df7
Cleanups for robustness, potentially buggy seek method implementation.
Ryan C. Gordon <icculus@icculus.org>
parents:
306
diff
changeset
|
213 dec->remaining = hdr.data_size; |
|
a81976ed5df7
Cleanups for robustness, potentially buggy seek method implementation.
Ryan C. Gordon <icculus@icculus.org>
parents:
306
diff
changeset
|
214 hsize = hdr.hdr_size; |
| 213 | 215 |
| 216 /* skip remaining part of header (input may be unseekable) */ | |
| 217 for (i = HDR_SIZE; i < hsize; i++) | |
|
330
a81976ed5df7
Cleanups for robustness, potentially buggy seek method implementation.
Ryan C. Gordon <icculus@icculus.org>
parents:
306
diff
changeset
|
218 { |
|
a81976ed5df7
Cleanups for robustness, potentially buggy seek method implementation.
Ryan C. Gordon <icculus@icculus.org>
parents:
306
diff
changeset
|
219 if (SDL_RWread(rw, &c, 1, 1) != 1) |
|
a81976ed5df7
Cleanups for robustness, potentially buggy seek method implementation.
Ryan C. Gordon <icculus@icculus.org>
parents:
306
diff
changeset
|
220 { |
|
a81976ed5df7
Cleanups for robustness, potentially buggy seek method implementation.
Ryan C. Gordon <icculus@icculus.org>
parents:
306
diff
changeset
|
221 free(dec); |
|
a81976ed5df7
Cleanups for robustness, potentially buggy seek method implementation.
Ryan C. Gordon <icculus@icculus.org>
parents:
306
diff
changeset
|
222 BAIL_MACRO(ERR_IO_ERROR, 0); |
|
a81976ed5df7
Cleanups for robustness, potentially buggy seek method implementation.
Ryan C. Gordon <icculus@icculus.org>
parents:
306
diff
changeset
|
223 } /* if */ |
|
a81976ed5df7
Cleanups for robustness, potentially buggy seek method implementation.
Ryan C. Gordon <icculus@icculus.org>
parents:
306
diff
changeset
|
224 } /* for */ |
|
217
9bab949e2318
Fixed memory leak I introduced, mangled coding style some more. :)
Ryan C. Gordon <icculus@icculus.org>
parents:
213
diff
changeset
|
225 } /* if */ |
| 213 | 226 |
| 227 else if (__Sound_strcasecmp(ext, "au") == 0) | |
| 228 { | |
| 229 /* | |
| 230 * A number of files in the wild have the .au extension but no valid | |
| 231 * header; these are traditionally assumed to be 8kHz µ-law. Handle | |
| 232 * them here only if the extension is recognized. | |
| 233 */ | |
| 234 | |
| 235 SNDDBG(("AU: Invalid header, assuming raw 8kHz µ-law.\n")); | |
| 236 /* if seeking fails, we lose 24 samples. big deal */ | |
| 237 SDL_RWseek(rw, -HDR_SIZE, SEEK_CUR); | |
| 238 dec->encoding = AU_ENC_ULAW_8; | |
| 239 dec->remaining = (Uint32)-1; /* no limit */ | |
| 240 sample->actual.format = AUDIO_S16SYS; | |
| 241 sample->actual.rate = 8000; | |
| 242 sample->actual.channels = 1; | |
|
217
9bab949e2318
Fixed memory leak I introduced, mangled coding style some more. :)
Ryan C. Gordon <icculus@icculus.org>
parents:
213
diff
changeset
|
243 } /* else if */ |
|
9bab949e2318
Fixed memory leak I introduced, mangled coding style some more. :)
Ryan C. Gordon <icculus@icculus.org>
parents:
213
diff
changeset
|
244 |
|
9bab949e2318
Fixed memory leak I introduced, mangled coding style some more. :)
Ryan C. Gordon <icculus@icculus.org>
parents:
213
diff
changeset
|
245 else |
|
9bab949e2318
Fixed memory leak I introduced, mangled coding style some more. :)
Ryan C. Gordon <icculus@icculus.org>
parents:
213
diff
changeset
|
246 { |
| 294 | 247 Sound_SetError("AU: Not an .AU stream."); |
|
217
9bab949e2318
Fixed memory leak I introduced, mangled coding style some more. :)
Ryan C. Gordon <icculus@icculus.org>
parents:
213
diff
changeset
|
248 free(dec); |
|
9bab949e2318
Fixed memory leak I introduced, mangled coding style some more. :)
Ryan C. Gordon <icculus@icculus.org>
parents:
213
diff
changeset
|
249 return(0); |
|
9bab949e2318
Fixed memory leak I introduced, mangled coding style some more. :)
Ryan C. Gordon <icculus@icculus.org>
parents:
213
diff
changeset
|
250 } /* else */ |
| 213 | 251 |
|
330
a81976ed5df7
Cleanups for robustness, potentially buggy seek method implementation.
Ryan C. Gordon <icculus@icculus.org>
parents:
306
diff
changeset
|
252 sample->flags = SOUND_SAMPLEFLAG_CANSEEK; |
|
221
c9772a9f5271
Initial implementation or stubs for rewind method. Other cleanups.
Ryan C. Gordon <icculus@icculus.org>
parents:
217
diff
changeset
|
253 dec->total = dec->remaining; |
|
c9772a9f5271
Initial implementation or stubs for rewind method. Other cleanups.
Ryan C. Gordon <icculus@icculus.org>
parents:
217
diff
changeset
|
254 dec->start_offset = SDL_RWtell(rw); |
| 213 | 255 |
| 256 SNDDBG(("AU: Accepting data stream.\n")); | |
|
217
9bab949e2318
Fixed memory leak I introduced, mangled coding style some more. :)
Ryan C. Gordon <icculus@icculus.org>
parents:
213
diff
changeset
|
257 return(1); |
|
9bab949e2318
Fixed memory leak I introduced, mangled coding style some more. :)
Ryan C. Gordon <icculus@icculus.org>
parents:
213
diff
changeset
|
258 } /* AU_open */ |
| 213 | 259 |
| 260 | |
| 261 static void AU_close(Sound_Sample *sample) | |
| 262 { | |
| 263 Sound_SampleInternal *internal = sample->opaque; | |
| 264 free(internal->decoder_private); | |
|
217
9bab949e2318
Fixed memory leak I introduced, mangled coding style some more. :)
Ryan C. Gordon <icculus@icculus.org>
parents:
213
diff
changeset
|
265 } /* AU_close */ |
|
9bab949e2318
Fixed memory leak I introduced, mangled coding style some more. :)
Ryan C. Gordon <icculus@icculus.org>
parents:
213
diff
changeset
|
266 |
| 213 | 267 |
| 268 /* table to convert from µ-law encoding to signed 16-bit samples, | |
| 269 generated by a throwaway perl script */ | |
| 270 static Sint16 ulaw_to_linear[256] = { | |
| 271 -32124,-31100,-30076,-29052,-28028,-27004,-25980,-24956, | |
| 272 -23932,-22908,-21884,-20860,-19836,-18812,-17788,-16764, | |
| 273 -15996,-15484,-14972,-14460,-13948,-13436,-12924,-12412, | |
| 274 -11900,-11388,-10876,-10364, -9852, -9340, -8828, -8316, | |
| 275 -7932, -7676, -7420, -7164, -6908, -6652, -6396, -6140, | |
| 276 -5884, -5628, -5372, -5116, -4860, -4604, -4348, -4092, | |
| 277 -3900, -3772, -3644, -3516, -3388, -3260, -3132, -3004, | |
| 278 -2876, -2748, -2620, -2492, -2364, -2236, -2108, -1980, | |
| 279 -1884, -1820, -1756, -1692, -1628, -1564, -1500, -1436, | |
| 280 -1372, -1308, -1244, -1180, -1116, -1052, -988, -924, | |
| 281 -876, -844, -812, -780, -748, -716, -684, -652, | |
| 282 -620, -588, -556, -524, -492, -460, -428, -396, | |
| 283 -372, -356, -340, -324, -308, -292, -276, -260, | |
| 284 -244, -228, -212, -196, -180, -164, -148, -132, | |
| 285 -120, -112, -104, -96, -88, -80, -72, -64, | |
| 286 -56, -48, -40, -32, -24, -16, -8, 0, | |
| 287 32124, 31100, 30076, 29052, 28028, 27004, 25980, 24956, | |
| 288 23932, 22908, 21884, 20860, 19836, 18812, 17788, 16764, | |
| 289 15996, 15484, 14972, 14460, 13948, 13436, 12924, 12412, | |
| 290 11900, 11388, 10876, 10364, 9852, 9340, 8828, 8316, | |
| 291 7932, 7676, 7420, 7164, 6908, 6652, 6396, 6140, | |
| 292 5884, 5628, 5372, 5116, 4860, 4604, 4348, 4092, | |
| 293 3900, 3772, 3644, 3516, 3388, 3260, 3132, 3004, | |
| 294 2876, 2748, 2620, 2492, 2364, 2236, 2108, 1980, | |
| 295 1884, 1820, 1756, 1692, 1628, 1564, 1500, 1436, | |
| 296 1372, 1308, 1244, 1180, 1116, 1052, 988, 924, | |
| 297 876, 844, 812, 780, 748, 716, 684, 652, | |
| 298 620, 588, 556, 524, 492, 460, 428, 396, | |
| 299 372, 356, 340, 324, 308, 292, 276, 260, | |
| 300 244, 228, 212, 196, 180, 164, 148, 132, | |
| 301 120, 112, 104, 96, 88, 80, 72, 64, | |
| 302 56, 48, 40, 32, 24, 16, 8, 0 | |
| 303 }; | |
| 304 | |
|
217
9bab949e2318
Fixed memory leak I introduced, mangled coding style some more. :)
Ryan C. Gordon <icculus@icculus.org>
parents:
213
diff
changeset
|
305 |
| 213 | 306 static Uint32 AU_read(Sound_Sample *sample) |
| 307 { | |
| 308 int ret; | |
| 309 Sound_SampleInternal *internal = sample->opaque; | |
| 310 struct audec *dec = internal->decoder_private; | |
| 311 int maxlen; | |
| 312 Uint8 *buf; | |
| 313 | |
| 314 maxlen = internal->buffer_size; | |
| 315 buf = internal->buffer; | |
| 316 if (dec->encoding == AU_ENC_ULAW_8) | |
| 317 { | |
| 318 /* We read µ-law samples into the second half of the buffer, so | |
| 319 we can expand them to 16-bit samples afterwards */ | |
| 320 maxlen >>= 1; | |
| 321 buf += maxlen; | |
|
217
9bab949e2318
Fixed memory leak I introduced, mangled coding style some more. :)
Ryan C. Gordon <icculus@icculus.org>
parents:
213
diff
changeset
|
322 } /* if */ |
| 213 | 323 |
|
221
c9772a9f5271
Initial implementation or stubs for rewind method. Other cleanups.
Ryan C. Gordon <icculus@icculus.org>
parents:
217
diff
changeset
|
324 if (maxlen > dec->remaining) |
| 213 | 325 maxlen = dec->remaining; |
| 326 ret = SDL_RWread(internal->rw, buf, 1, maxlen); | |
| 327 if (ret == 0) | |
| 328 sample->flags |= SOUND_SAMPLEFLAG_EOF; | |
| 329 else if (ret == -1) | |
| 330 sample->flags |= SOUND_SAMPLEFLAG_ERROR; | |
| 331 else | |
| 332 { | |
| 333 dec->remaining -= ret; | |
| 334 if (ret < maxlen) | |
| 335 sample->flags |= SOUND_SAMPLEFLAG_EAGAIN; | |
| 336 | |
| 337 if (dec->encoding == AU_ENC_ULAW_8) | |
| 338 { | |
| 339 int i; | |
| 340 Sint16 *dst = internal->buffer; | |
| 341 for (i = 0; i < ret; i++) | |
| 342 dst[i] = ulaw_to_linear[buf[i]]; | |
| 343 ret <<= 1; /* return twice as much as read */ | |
|
217
9bab949e2318
Fixed memory leak I introduced, mangled coding style some more. :)
Ryan C. Gordon <icculus@icculus.org>
parents:
213
diff
changeset
|
344 } /* if */ |
|
9bab949e2318
Fixed memory leak I introduced, mangled coding style some more. :)
Ryan C. Gordon <icculus@icculus.org>
parents:
213
diff
changeset
|
345 } /* else */ |
| 213 | 346 |
|
217
9bab949e2318
Fixed memory leak I introduced, mangled coding style some more. :)
Ryan C. Gordon <icculus@icculus.org>
parents:
213
diff
changeset
|
347 return(ret); |
|
9bab949e2318
Fixed memory leak I introduced, mangled coding style some more. :)
Ryan C. Gordon <icculus@icculus.org>
parents:
213
diff
changeset
|
348 } /* AU_read */ |
| 213 | 349 |
|
221
c9772a9f5271
Initial implementation or stubs for rewind method. Other cleanups.
Ryan C. Gordon <icculus@icculus.org>
parents:
217
diff
changeset
|
350 |
|
c9772a9f5271
Initial implementation or stubs for rewind method. Other cleanups.
Ryan C. Gordon <icculus@icculus.org>
parents:
217
diff
changeset
|
351 static int AU_rewind(Sound_Sample *sample) |
|
c9772a9f5271
Initial implementation or stubs for rewind method. Other cleanups.
Ryan C. Gordon <icculus@icculus.org>
parents:
217
diff
changeset
|
352 { |
|
c9772a9f5271
Initial implementation or stubs for rewind method. Other cleanups.
Ryan C. Gordon <icculus@icculus.org>
parents:
217
diff
changeset
|
353 Sound_SampleInternal *internal = (Sound_SampleInternal *) sample->opaque; |
|
c9772a9f5271
Initial implementation or stubs for rewind method. Other cleanups.
Ryan C. Gordon <icculus@icculus.org>
parents:
217
diff
changeset
|
354 struct audec *dec = (struct audec *) internal->decoder_private; |
|
c9772a9f5271
Initial implementation or stubs for rewind method. Other cleanups.
Ryan C. Gordon <icculus@icculus.org>
parents:
217
diff
changeset
|
355 int rc = SDL_RWseek(internal->rw, dec->start_offset, SEEK_SET); |
|
c9772a9f5271
Initial implementation or stubs for rewind method. Other cleanups.
Ryan C. Gordon <icculus@icculus.org>
parents:
217
diff
changeset
|
356 BAIL_IF_MACRO(rc != dec->start_offset, ERR_IO_ERROR, 0); |
|
c9772a9f5271
Initial implementation or stubs for rewind method. Other cleanups.
Ryan C. Gordon <icculus@icculus.org>
parents:
217
diff
changeset
|
357 dec->remaining = dec->total; |
|
c9772a9f5271
Initial implementation or stubs for rewind method. Other cleanups.
Ryan C. Gordon <icculus@icculus.org>
parents:
217
diff
changeset
|
358 return(1); |
|
c9772a9f5271
Initial implementation or stubs for rewind method. Other cleanups.
Ryan C. Gordon <icculus@icculus.org>
parents:
217
diff
changeset
|
359 } /* AU_rewind */ |
|
c9772a9f5271
Initial implementation or stubs for rewind method. Other cleanups.
Ryan C. Gordon <icculus@icculus.org>
parents:
217
diff
changeset
|
360 |
|
306
c97be6e1bd27
Added framework for Sound_Seek() support.
Ryan C. Gordon <icculus@icculus.org>
parents:
294
diff
changeset
|
361 |
|
c97be6e1bd27
Added framework for Sound_Seek() support.
Ryan C. Gordon <icculus@icculus.org>
parents:
294
diff
changeset
|
362 static int AU_seek(Sound_Sample *sample, Uint32 ms) |
|
c97be6e1bd27
Added framework for Sound_Seek() support.
Ryan C. Gordon <icculus@icculus.org>
parents:
294
diff
changeset
|
363 { |
|
330
a81976ed5df7
Cleanups for robustness, potentially buggy seek method implementation.
Ryan C. Gordon <icculus@icculus.org>
parents:
306
diff
changeset
|
364 Sound_SampleInternal *internal = (Sound_SampleInternal *) sample->opaque; |
|
a81976ed5df7
Cleanups for robustness, potentially buggy seek method implementation.
Ryan C. Gordon <icculus@icculus.org>
parents:
306
diff
changeset
|
365 struct audec *dec = (struct audec *) internal->decoder_private; |
|
331
e683cb99f88f
Fixed seek implementation.
Ryan C. Gordon <icculus@icculus.org>
parents:
330
diff
changeset
|
366 int offset = __Sound_convertMsToBytePos(&sample->actual, ms); |
|
330
a81976ed5df7
Cleanups for robustness, potentially buggy seek method implementation.
Ryan C. Gordon <icculus@icculus.org>
parents:
306
diff
changeset
|
367 int rc; |
|
331
e683cb99f88f
Fixed seek implementation.
Ryan C. Gordon <icculus@icculus.org>
parents:
330
diff
changeset
|
368 int pos; |
|
330
a81976ed5df7
Cleanups for robustness, potentially buggy seek method implementation.
Ryan C. Gordon <icculus@icculus.org>
parents:
306
diff
changeset
|
369 |
|
331
e683cb99f88f
Fixed seek implementation.
Ryan C. Gordon <icculus@icculus.org>
parents:
330
diff
changeset
|
370 if (dec->encoding == AU_ENC_ULAW_8) |
|
e683cb99f88f
Fixed seek implementation.
Ryan C. Gordon <icculus@icculus.org>
parents:
330
diff
changeset
|
371 offset >>= 1; /* halve the byte offset for compression. */ |
|
330
a81976ed5df7
Cleanups for robustness, potentially buggy seek method implementation.
Ryan C. Gordon <icculus@icculus.org>
parents:
306
diff
changeset
|
372 |
|
331
e683cb99f88f
Fixed seek implementation.
Ryan C. Gordon <icculus@icculus.org>
parents:
330
diff
changeset
|
373 pos = (int) (dec->start_offset + offset); |
|
e683cb99f88f
Fixed seek implementation.
Ryan C. Gordon <icculus@icculus.org>
parents:
330
diff
changeset
|
374 rc = SDL_RWseek(internal->rw, pos, SEEK_SET); |
|
e683cb99f88f
Fixed seek implementation.
Ryan C. Gordon <icculus@icculus.org>
parents:
330
diff
changeset
|
375 BAIL_IF_MACRO(rc != pos, ERR_IO_ERROR, 0); |
|
e683cb99f88f
Fixed seek implementation.
Ryan C. Gordon <icculus@icculus.org>
parents:
330
diff
changeset
|
376 dec->remaining = dec->total - offset; |
|
330
a81976ed5df7
Cleanups for robustness, potentially buggy seek method implementation.
Ryan C. Gordon <icculus@icculus.org>
parents:
306
diff
changeset
|
377 return(1); |
|
306
c97be6e1bd27
Added framework for Sound_Seek() support.
Ryan C. Gordon <icculus@icculus.org>
parents:
294
diff
changeset
|
378 } /* AU_seek */ |
|
c97be6e1bd27
Added framework for Sound_Seek() support.
Ryan C. Gordon <icculus@icculus.org>
parents:
294
diff
changeset
|
379 |
| 213 | 380 #endif /* SOUND_SUPPORTS_AU */ |
| 381 |