Mercurial > SDL_sound_CoreAudio
annotate decoders/flac.c @ 447:c98a34c00069
Fixed MIDI decoding on bigendian systems.
| author | Ryan C. Gordon <icculus@icculus.org> |
|---|---|
| date | Tue, 05 Aug 2003 10:07:20 +0000 |
| parents | 30f96c853462 |
| children | c66080364dff c5f184b4b2cd |
| rev | line source |
|---|---|
| 155 | 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 * FLAC decoder for SDL_sound. | |
| 22 * | |
| 23 * This driver handles FLAC audio, that is to say the Free Lossless Audio | |
| 24 * Codec. It depends on libFLAC for decoding, which can be grabbed from: | |
| 25 * http://flac.sourceforge.net | |
| 26 * | |
|
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27 * Please see the file COPYING in the source's root directory. |
| 155 | 28 * |
| 29 * This file written by Torbjörn Andersson. (d91tan@Update.UU.SE) | |
| 30 */ | |
| 31 | |
| 32 #if HAVE_CONFIG_H | |
| 33 # include <config.h> | |
| 34 #endif | |
| 35 | |
| 36 #ifdef SOUND_SUPPORTS_FLAC | |
| 37 | |
| 38 #include <stdio.h> | |
| 39 #include <stdlib.h> | |
| 40 #include <string.h> | |
| 41 | |
| 42 #include "SDL_sound.h" | |
| 43 | |
| 44 #define __SDL_SOUND_INTERNAL__ | |
| 45 #include "SDL_sound_internal.h" | |
| 46 | |
| 443 | 47 #include <FLAC/seekable_stream_decoder.h> |
| 312 | 48 |
| 49 #define D_END_OF_STREAM FLAC__SEEKABLE_STREAM_DECODER_END_OF_STREAM | |
| 50 | |
| 51 #define d_new() FLAC__seekable_stream_decoder_new() | |
| 52 #define d_init(x) FLAC__seekable_stream_decoder_init(x) | |
|
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53 #define d_process_metadata(x) FLAC__seekable_stream_decoder_process_until_end_of_metadata(x) |
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54 #define d_process_one_frame(x) FLAC__seekable_stream_decoder_process_single(x) |
| 312 | 55 #define d_get_state(x) FLAC__seekable_stream_decoder_get_state(x) |
| 56 #define d_finish(x) FLAC__seekable_stream_decoder_finish(x) | |
| 57 #define d_delete(x) FLAC__seekable_stream_decoder_delete(x) | |
| 58 #define d_set_read_callback(x, y) FLAC__seekable_stream_decoder_set_read_callback(x, y) | |
| 59 #define d_set_write_callback(x, y) FLAC__seekable_stream_decoder_set_write_callback(x, y) | |
| 60 #define d_set_metadata_callback(x, y) FLAC__seekable_stream_decoder_set_metadata_callback(x, y) | |
| 61 #define d_set_error_callback(x, y) FLAC__seekable_stream_decoder_set_error_callback(x, y) | |
| 62 #define d_set_client_data(x, y) FLAC__seekable_stream_decoder_set_client_data(x, y) | |
| 63 | |
| 64 typedef FLAC__SeekableStreamDecoder decoder_t; | |
| 65 typedef FLAC__SeekableStreamDecoderReadStatus d_read_status_t; | |
| 66 | |
| 67 #define D_SEEK_STATUS_OK FLAC__SEEKABLE_STREAM_DECODER_SEEK_STATUS_OK | |
| 68 #define D_SEEK_STATUS_ERROR FLAC__SEEKABLE_STREAM_DECODER_SEEK_STATUS_ERROR | |
| 69 #define D_TELL_STATUS_OK FLAC__SEEKABLE_STREAM_DECODER_TELL_STATUS_OK | |
| 70 #define D_TELL_STATUS_ERROR FLAC__SEEKABLE_STREAM_DECODER_TELL_STATUS_ERROR | |
| 71 #define D_LENGTH_STATUS_OK FLAC__SEEKABLE_STREAM_DECODER_LENGTH_STATUS_OK | |
| 72 #define D_LENGTH_STATUS_ERROR FLAC__SEEKABLE_STREAM_DECODER_LENGTH_STATUS_ERROR | |
| 73 | |
| 74 #define d_set_seek_callback(x, y) FLAC__seekable_stream_decoder_set_seek_callback(x, y) | |
| 75 #define d_set_tell_callback(x, y) FLAC__seekable_stream_decoder_set_tell_callback(x, y) | |
| 76 #define d_set_length_callback(x, y) FLAC__seekable_stream_decoder_set_length_callback(x, y) | |
| 77 #define d_set_eof_callback(x, y) FLAC__seekable_stream_decoder_set_eof_callback(x, y) | |
| 78 #define d_seek_absolute(x, y) FLAC__seekable_stream_decoder_seek_absolute(x, y) | |
| 79 | |
| 80 typedef FLAC__SeekableStreamDecoderSeekStatus d_seek_status_t; | |
| 81 typedef FLAC__SeekableStreamDecoderTellStatus d_tell_status_t; | |
| 82 typedef FLAC__SeekableStreamDecoderLengthStatus d_length_status_t; | |
| 83 | |
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84 #define D_WRITE_CONTINUE FLAC__STREAM_DECODER_WRITE_STATUS_CONTINUE |
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85 #define D_READ_END_OF_STREAM FLAC__STREAM_DECODER_READ_STATUS_END_OF_STREAM |
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86 #define D_READ_ABORT FLAC__STREAM_DECODER_READ_STATUS_ABORT |
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87 #define D_READ_CONTINUE FLAC__STREAM_DECODER_READ_STATUS_CONTINUE |
| 312 | 88 |
| 89 #define d_error_status_string FLAC__StreamDecoderErrorStatusString | |
| 90 | |
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91 typedef FLAC__StreamDecoderErrorStatus d_error_status_t; |
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92 typedef FLAC__StreamMetadata d_metadata_t; |
| 312 | 93 typedef FLAC__StreamDecoderWriteStatus d_write_status_t; |
| 94 | |
| 155 | 95 |
| 96 static int FLAC_init(void); | |
| 97 static void FLAC_quit(void); | |
| 98 static int FLAC_open(Sound_Sample *sample, const char *ext); | |
| 99 static void FLAC_close(Sound_Sample *sample); | |
| 100 static Uint32 FLAC_read(Sound_Sample *sample); | |
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101 static int FLAC_rewind(Sound_Sample *sample); |
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102 static int FLAC_seek(Sound_Sample *sample, Uint32 ms); |
| 155 | 103 |
| 104 static const char *extensions_flac[] = { "FLAC", "FLA", NULL }; | |
| 105 | |
| 106 const Sound_DecoderFunctions __Sound_DecoderFunctions_FLAC = | |
| 107 { | |
| 108 { | |
| 109 extensions_flac, | |
| 110 "Free Lossless Audio Codec", | |
| 111 "Torbjörn Andersson <d91tan@Update.UU.SE>", | |
| 112 "http://flac.sourceforge.net/" | |
| 113 }, | |
| 114 | |
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115 FLAC_init, /* init() method */ |
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116 FLAC_quit, /* quit() method */ |
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117 FLAC_open, /* open() method */ |
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118 FLAC_close, /* close() method */ |
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119 FLAC_read, /* read() method */ |
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120 FLAC_rewind, /* rewind() method */ |
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121 FLAC_seek /* seek() method */ |
| 155 | 122 }; |
| 123 | |
| 124 /* This is what we store in our internal->decoder_private field. */ | |
| 125 typedef struct | |
| 126 { | |
| 312 | 127 decoder_t *decoder; |
| 155 | 128 SDL_RWops *rw; |
| 129 Sound_Sample *sample; | |
| 130 Uint32 frame_size; | |
|
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131 Uint8 is_flac; |
| 312 | 132 Uint32 stream_length; |
| 155 | 133 } flac_t; |
| 134 | |
| 135 | |
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136 static void free_flac(flac_t *f) |
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137 { |
| 312 | 138 d_finish(f->decoder); |
| 139 d_delete(f->decoder); | |
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140 free(f); |
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141 } /* free_flac */ |
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142 |
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143 |
| 312 | 144 static d_read_status_t read_callback( |
| 145 const decoder_t *decoder, FLAC__byte buffer[], | |
| 155 | 146 unsigned int *bytes, void *client_data) |
| 147 { | |
| 148 flac_t *f = (flac_t *) client_data; | |
| 149 Uint32 retval; | |
| 150 | |
| 151 retval = SDL_RWread(f->rw, (Uint8 *) buffer, 1, *bytes); | |
| 152 | |
| 153 if (retval == 0) | |
| 154 { | |
| 155 *bytes = 0; | |
| 156 f->sample->flags |= SOUND_SAMPLEFLAG_EOF; | |
| 312 | 157 return(D_READ_END_OF_STREAM); |
| 155 | 158 } /* if */ |
| 159 | |
| 160 if (retval == -1) | |
| 161 { | |
| 162 *bytes = 0; | |
| 163 f->sample->flags |= SOUND_SAMPLEFLAG_ERROR; | |
| 312 | 164 return(D_READ_ABORT); |
| 155 | 165 } /* if */ |
| 166 | |
| 167 if (retval < *bytes) | |
| 168 { | |
| 169 *bytes = retval; | |
| 170 f->sample->flags |= SOUND_SAMPLEFLAG_EAGAIN; | |
| 171 } /* if */ | |
| 172 | |
| 312 | 173 return(D_READ_CONTINUE); |
| 174 } /* read_callback */ | |
| 155 | 175 |
| 176 | |
| 312 | 177 static d_write_status_t write_callback( |
| 178 const decoder_t *decoder, const FLAC__Frame *frame, | |
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179 const FLAC__int32 * const buffer[], |
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180 void *client_data) |
| 155 | 181 { |
| 182 flac_t *f = (flac_t *) client_data; | |
| 183 Uint32 i, j; | |
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184 Uint32 sample; |
| 155 | 185 Uint8 *dst; |
| 186 | |
| 187 f->frame_size = frame->header.channels * frame->header.blocksize | |
| 188 * frame->header.bits_per_sample / 8; | |
| 189 | |
| 190 if (f->frame_size > f->sample->buffer_size) | |
| 191 Sound_SetBufferSize(f->sample, f->frame_size); | |
| 192 | |
| 193 dst = f->sample->buffer; | |
| 194 | |
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195 /* If the sample is neither exactly 8-bit nor 16-bit, it will have to |
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196 * be converted. Unfortunately the buffer is read-only, so we either |
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197 * have to check for each sample, or make a copy of the buffer. I'm |
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198 * not sure which way is best, so I've arbitrarily picked the former. |
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199 */ |
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200 if (f->sample->actual.format == AUDIO_S8) |
| 155 | 201 { |
| 202 for (i = 0; i < frame->header.blocksize; i++) | |
| 203 for (j = 0; j < frame->header.channels; j++) | |
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204 { |
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205 sample = buffer[j][i]; |
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206 if (frame->header.bits_per_sample < 8) |
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207 sample <<= (8 - frame->header.bits_per_sample); |
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208 *dst++ = sample & 0x00ff; |
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209 } /* for */ |
| 155 | 210 } /* if */ |
| 211 else | |
| 212 { | |
| 213 for (i = 0; i < frame->header.blocksize; i++) | |
| 214 for (j = 0; j < frame->header.channels; j++) | |
| 215 { | |
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216 sample = buffer[j][i]; |
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217 if (frame->header.bits_per_sample < 16) |
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218 sample <<= (16 - frame->header.bits_per_sample); |
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219 else if (frame->header.bits_per_sample > 16) |
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220 sample >>= (frame->header.bits_per_sample - 16); |
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221 *dst++ = (sample & 0xff00) >> 8; |
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222 *dst++ = sample & 0x00ff; |
| 155 | 223 } /* for */ |
| 224 } /* else */ | |
| 225 | |
| 312 | 226 return(D_WRITE_CONTINUE); |
| 227 } /* write_callback */ | |
| 155 | 228 |
| 229 | |
| 312 | 230 static void metadata_callback( |
| 231 const decoder_t *decoder, | |
| 232 const d_metadata_t *metadata, | |
| 155 | 233 void *client_data) |
| 234 { | |
| 235 flac_t *f = (flac_t *) client_data; | |
| 312 | 236 |
| 155 | 237 SNDDBG(("FLAC: Metadata callback.\n")); |
| 238 | |
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239 /* There are several kinds of metadata, but STREAMINFO is the only |
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240 * one that always has to be there. |
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241 */ |
| 155 | 242 if (metadata->type == FLAC__METADATA_TYPE_STREAMINFO) |
| 243 { | |
| 244 SNDDBG(("FLAC: Metadata is streaminfo.\n")); | |
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245 |
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246 f->is_flac = 1; |
| 155 | 247 f->sample->actual.channels = metadata->data.stream_info.channels; |
| 248 f->sample->actual.rate = metadata->data.stream_info.sample_rate; | |
| 249 | |
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250 if (metadata->data.stream_info.bits_per_sample > 8) |
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251 f->sample->actual.format = AUDIO_S16MSB; |
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252 else |
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253 f->sample->actual.format = AUDIO_S8; |
| 155 | 254 } /* if */ |
| 312 | 255 } /* metadata_callback */ |
| 155 | 256 |
| 257 | |
| 312 | 258 static void error_callback( |
| 259 const decoder_t *decoder, | |
| 260 d_error_status_t status, | |
| 155 | 261 void *client_data) |
| 262 { | |
| 263 flac_t *f = (flac_t *) client_data; | |
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264 |
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265 __Sound_SetError(d_error_status_string[status]); |
| 155 | 266 f->sample->flags |= SOUND_SAMPLEFLAG_ERROR; |
| 312 | 267 } /* error_callback */ |
| 268 | |
| 269 | |
| 270 static d_seek_status_t seek_callback( | |
| 271 const decoder_t *decoder, | |
| 272 FLAC__uint64 absolute_byte_offset, | |
| 273 void *client_data) | |
| 274 { | |
| 275 flac_t *f = (flac_t *) client_data; | |
| 276 | |
| 277 if (SDL_RWseek(f->rw, absolute_byte_offset, SEEK_SET) >= 0) | |
| 278 { | |
| 279 return(D_SEEK_STATUS_OK); | |
| 280 } /* if */ | |
| 281 | |
| 282 return(D_SEEK_STATUS_ERROR); | |
| 283 } /* seek_callback*/ | |
| 284 | |
| 285 | |
| 286 static d_tell_status_t tell_callback( | |
| 287 const decoder_t *decoder, | |
| 288 FLAC__uint64 *absolute_byte_offset, | |
| 289 void *client_data) | |
| 290 { | |
| 291 flac_t *f = (flac_t *) client_data; | |
| 400 | 292 int pos; |
| 312 | 293 |
| 294 pos = SDL_RWtell(f->rw); | |
| 295 | |
| 296 if (pos < 0) | |
| 297 { | |
| 298 return(D_TELL_STATUS_ERROR); | |
| 299 } /* if */ | |
| 155 | 300 |
| 312 | 301 *absolute_byte_offset = pos; |
| 302 return(D_TELL_STATUS_OK); | |
| 303 } /* tell_callback */ | |
| 304 | |
| 305 | |
| 306 static d_length_status_t length_callback( | |
| 307 const decoder_t *decoder, | |
| 308 FLAC__uint64 *stream_length, | |
| 309 void *client_data) | |
| 310 { | |
| 311 flac_t *f = (flac_t *) client_data; | |
| 312 | |
| 313 if (f->sample->flags & SOUND_SAMPLEFLAG_CANSEEK) | |
| 314 { | |
| 315 *stream_length = f->stream_length; | |
| 316 return(D_LENGTH_STATUS_OK); | |
| 317 } /* if */ | |
| 318 | |
| 319 return(D_LENGTH_STATUS_ERROR); | |
| 320 } /* length_callback */ | |
| 321 | |
| 322 | |
| 323 static FLAC__bool eof_callback( | |
| 324 const decoder_t *decoder, | |
| 325 void *client_data) | |
| 326 { | |
| 327 flac_t *f = (flac_t *) client_data; | |
| 400 | 328 int pos; |
| 312 | 329 |
| 330 /* Maybe we could check for SOUND_SAMPLEFLAG_EOF here instead? */ | |
| 331 pos = SDL_RWtell(f->rw); | |
| 332 | |
| 333 if (pos >= 0 && pos >= f->stream_length) | |
| 334 { | |
| 335 return(true); | |
| 336 } /* if */ | |
| 337 | |
| 338 return(false); | |
| 339 } /* eof_callback */ | |
| 340 | |
| 155 | 341 |
| 342 static int FLAC_init(void) | |
| 343 { | |
| 344 return(1); /* always succeeds. */ | |
| 345 } /* FLAC_init */ | |
| 346 | |
| 347 | |
| 348 static void FLAC_quit(void) | |
| 349 { | |
| 350 /* it's a no-op. */ | |
| 351 } /* FLAC_quit */ | |
| 352 | |
| 353 | |
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354 #define FLAC_MAGIC 0x43614C66 /* "fLaC" in ASCII. */ |
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355 |
| 155 | 356 static int FLAC_open(Sound_Sample *sample, const char *ext) |
| 357 { | |
| 358 Sound_SampleInternal *internal = (Sound_SampleInternal *) sample->opaque; | |
| 359 SDL_RWops *rw = internal->rw; | |
| 312 | 360 decoder_t *decoder; |
| 155 | 361 flac_t *f; |
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362 int i; |
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363 int has_extension = 0; |
| 312 | 364 Uint32 pos; |
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365 |
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366 /* |
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367 * If the extension is "flac", we'll believe that this is really meant |
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368 * to be a FLAC stream, and will try to grok it from existing metadata. |
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369 * metadata searching can be a very expensive operation, however, so |
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370 * unless the user swears that it is a FLAC stream through the extension, |
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371 * we decide what to do based on the existance of a 32-bit magic number. |
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372 */ |
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373 for (i = 0; extensions_flac[i] != NULL; i++) |
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374 { |
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375 if (__Sound_strcasecmp(ext, extensions_flac[i]) == 0) |
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376 { |
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377 has_extension = 1; |
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378 break; |
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379 } /* if */ |
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380 } /* for */ |
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381 |
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382 if (!has_extension) |
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383 { |
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384 int rc; |
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385 Uint32 flac_magic = SDL_ReadLE32(rw); |
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386 BAIL_IF_MACRO(flac_magic != FLAC_MAGIC, "FLAC: Not a FLAC stream.", 0); |
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387 |
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388 /* move back over magic number for metadata scan... */ |
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389 rc = SDL_RWseek(internal->rw, -sizeof (flac_magic), SEEK_CUR); |
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390 BAIL_IF_MACRO(rc < 0, ERR_IO_ERROR, 0); |
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391 } /* if */ |
| 155 | 392 |
| 393 f = (flac_t *) malloc(sizeof (flac_t)); | |
| 394 BAIL_IF_MACRO(f == NULL, ERR_OUT_OF_MEMORY, 0); | |
| 395 | |
| 312 | 396 decoder = d_new(); |
| 155 | 397 if (decoder == NULL) |
| 398 { | |
| 399 free(f); | |
|
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400 BAIL_MACRO(ERR_OUT_OF_MEMORY, 0); |
| 155 | 401 } /* if */ |
| 402 | |
| 312 | 403 d_set_read_callback(decoder, read_callback); |
| 404 d_set_write_callback(decoder, write_callback); | |
| 405 d_set_metadata_callback(decoder, metadata_callback); | |
| 406 d_set_error_callback(decoder, error_callback); | |
| 407 d_set_seek_callback(decoder, seek_callback); | |
| 408 d_set_tell_callback(decoder, tell_callback); | |
| 409 d_set_length_callback(decoder, length_callback); | |
| 410 d_set_eof_callback(decoder, eof_callback); | |
|
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411 |
| 312 | 412 d_set_client_data(decoder, f); |
| 155 | 413 |
| 414 f->rw = internal->rw; | |
| 415 f->sample = sample; | |
| 416 f->decoder = decoder; | |
|
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417 f->sample->actual.format = 0; |
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418 f->is_flac = 0 /* !!! FIXME: should be "has_extension", not "0". */; |
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419 |
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420 internal->decoder_private = f; |
| 312 | 421 d_init(decoder); |
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422 |
| 400 | 423 sample->flags = SOUND_SAMPLEFLAG_NONE; |
| 424 | |
| 425 pos = SDL_RWtell(f->rw); | |
| 426 if (SDL_RWseek(f->rw, 0, SEEK_END) > 0) | |
| 427 { | |
| 428 f->stream_length = SDL_RWtell(f->rw); | |
| 429 if (SDL_RWseek(f->rw, pos, SEEK_SET) == -1) | |
| 430 { | |
| 431 free_flac(f); | |
| 432 BAIL_MACRO(ERR_IO_ERROR, 0); | |
| 433 } /* if */ | |
| 434 sample->flags = SOUND_SAMPLEFLAG_CANSEEK; | |
| 435 } /* if */ | |
| 436 | |
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437 /* |
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438 * If we are not sure this is a FLAC stream, check for the STREAMINFO |
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439 * metadata block. If not, we'd have to peek at the first audio frame |
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440 * and get the sound format from there, but that is not yet |
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441 * implemented. |
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442 */ |
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443 if (!f->is_flac) |
| 155 | 444 { |
| 312 | 445 d_process_metadata(decoder); |
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446 |
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447 /* Still not FLAC? Give up. */ |
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448 if (!f->is_flac) |
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449 { |
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450 free_flac(f); |
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451 BAIL_MACRO("FLAC: No metadata found. Not a FLAC stream?", 0); |
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452 } /* if */ |
| 155 | 453 } /* if */ |
| 454 | |
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455 SNDDBG(("FLAC: Accepting data stream.\n")); |
| 155 | 456 return(1); |
| 457 } /* FLAC_open */ | |
| 458 | |
| 459 | |
| 460 static void FLAC_close(Sound_Sample *sample) | |
| 461 { | |
| 462 Sound_SampleInternal *internal = (Sound_SampleInternal *) sample->opaque; | |
| 463 flac_t *f = (flac_t *) internal->decoder_private; | |
| 464 | |
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465 free_flac(f); |
| 155 | 466 } /* FLAC_close */ |
| 467 | |
| 468 | |
| 469 static Uint32 FLAC_read(Sound_Sample *sample) | |
| 470 { | |
| 471 Sound_SampleInternal *internal = (Sound_SampleInternal *) sample->opaque; | |
| 472 flac_t *f = (flac_t *) internal->decoder_private; | |
| 473 Uint32 len; | |
| 474 | |
| 312 | 475 if (!d_process_one_frame(f->decoder)) |
| 155 | 476 { |
| 477 sample->flags |= SOUND_SAMPLEFLAG_ERROR; | |
|
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478 BAIL_MACRO("FLAC: Couldn't decode frame.", 0); |
| 155 | 479 } /* if */ |
| 480 | |
| 312 | 481 if (d_get_state(f->decoder) == D_END_OF_STREAM) |
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482 { |
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483 sample->flags |= SOUND_SAMPLEFLAG_EOF; |
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484 return(0); |
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485 } /* if */ |
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486 |
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487 /* An error may have been signalled through the error callback. */ |
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488 if (sample->flags & SOUND_SAMPLEFLAG_ERROR) |
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489 return(0); |
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490 |
| 155 | 491 return(f->frame_size); |
| 492 } /* FLAC_read */ | |
| 493 | |
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494 |
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495 static int FLAC_rewind(Sound_Sample *sample) |
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496 { |
| 312 | 497 return FLAC_seek(sample, 0); |
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498 } /* FLAC_rewind */ |
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499 |
|
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500 |
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501 static int FLAC_seek(Sound_Sample *sample, Uint32 ms) |
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502 { |
| 312 | 503 Sound_SampleInternal *internal = (Sound_SampleInternal *) sample->opaque; |
| 504 flac_t *f = (flac_t *) internal->decoder_private; | |
| 505 | |
| 506 d_seek_absolute(f->decoder, (ms * sample->actual.rate) / 1000); | |
| 507 return(1); | |
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508 } /* FLAC_seek */ |
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509 |
| 155 | 510 #endif /* SOUND_SUPPORTS_FLAC */ |
| 511 | |
| 512 /* end of flac.c ... */ |