Mercurial > SDL_sound_CoreAudio
annotate decoders/flac.c @ 491:8e9720b66e55
Patched to compile on more severe compilers.
| author | Ryan C. Gordon <icculus@icculus.org> |
|---|---|
| date | Wed, 14 Sep 2005 20:01:50 +0000 |
| parents | 3e705c9180e5 |
| children | 46d5f399cb35 |
| 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; | |
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236 Sound_Sample *sample = f->sample; |
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237 Sound_SampleInternal *internal = (Sound_SampleInternal *) sample->opaque; |
| 312 | 238 |
| 155 | 239 SNDDBG(("FLAC: Metadata callback.\n")); |
| 240 | |
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241 /* There are several kinds of metadata, but STREAMINFO is the only |
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242 * one that always has to be there. |
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243 */ |
| 155 | 244 if (metadata->type == FLAC__METADATA_TYPE_STREAMINFO) |
| 245 { | |
| 246 SNDDBG(("FLAC: Metadata is streaminfo.\n")); | |
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247 |
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248 f->is_flac = 1; |
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249 sample->actual.channels = metadata->data.stream_info.channels; |
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250 sample->actual.rate = metadata->data.stream_info.sample_rate; |
| 155 | 251 |
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252 if (metadata->data.stream_info.sample_rate == 0 || |
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253 metadata->data.stream_info.total_samples == 0) |
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254 { |
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255 internal->total_time = -1; |
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256 } /* if */ |
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257 else |
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258 { |
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259 internal->total_time = (metadata->data.stream_info.total_samples) |
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260 / metadata->data.stream_info.sample_rate * 1000; |
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261 internal->total_time += (metadata->data.stream_info.total_samples |
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262 % metadata->data.stream_info.sample_rate) * 1000 |
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263 / metadata->data.stream_info.sample_rate; |
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264 } /* else */ |
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265 |
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266 if (metadata->data.stream_info.bits_per_sample > 8) |
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267 sample->actual.format = AUDIO_S16MSB; |
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268 else |
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269 sample->actual.format = AUDIO_S8; |
| 155 | 270 } /* if */ |
| 312 | 271 } /* metadata_callback */ |
| 155 | 272 |
| 273 | |
| 312 | 274 static void error_callback( |
| 275 const decoder_t *decoder, | |
| 276 d_error_status_t status, | |
| 155 | 277 void *client_data) |
| 278 { | |
| 279 flac_t *f = (flac_t *) client_data; | |
|
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280 |
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281 __Sound_SetError(d_error_status_string[status]); |
| 155 | 282 f->sample->flags |= SOUND_SAMPLEFLAG_ERROR; |
| 312 | 283 } /* error_callback */ |
| 284 | |
| 285 | |
| 286 static d_seek_status_t seek_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; | |
| 292 | |
| 293 if (SDL_RWseek(f->rw, absolute_byte_offset, SEEK_SET) >= 0) | |
| 294 { | |
| 295 return(D_SEEK_STATUS_OK); | |
| 296 } /* if */ | |
| 297 | |
| 298 return(D_SEEK_STATUS_ERROR); | |
| 299 } /* seek_callback*/ | |
| 300 | |
| 301 | |
| 302 static d_tell_status_t tell_callback( | |
| 303 const decoder_t *decoder, | |
| 304 FLAC__uint64 *absolute_byte_offset, | |
| 305 void *client_data) | |
| 306 { | |
| 307 flac_t *f = (flac_t *) client_data; | |
| 400 | 308 int pos; |
| 312 | 309 |
| 310 pos = SDL_RWtell(f->rw); | |
| 311 | |
| 312 if (pos < 0) | |
| 313 { | |
| 314 return(D_TELL_STATUS_ERROR); | |
| 315 } /* if */ | |
| 155 | 316 |
| 312 | 317 *absolute_byte_offset = pos; |
| 318 return(D_TELL_STATUS_OK); | |
| 319 } /* tell_callback */ | |
| 320 | |
| 321 | |
| 322 static d_length_status_t length_callback( | |
| 323 const decoder_t *decoder, | |
| 324 FLAC__uint64 *stream_length, | |
| 325 void *client_data) | |
| 326 { | |
| 327 flac_t *f = (flac_t *) client_data; | |
| 328 | |
| 329 if (f->sample->flags & SOUND_SAMPLEFLAG_CANSEEK) | |
| 330 { | |
| 331 *stream_length = f->stream_length; | |
| 332 return(D_LENGTH_STATUS_OK); | |
| 333 } /* if */ | |
| 334 | |
| 335 return(D_LENGTH_STATUS_ERROR); | |
| 336 } /* length_callback */ | |
| 337 | |
| 338 | |
| 339 static FLAC__bool eof_callback( | |
| 340 const decoder_t *decoder, | |
| 341 void *client_data) | |
| 342 { | |
| 343 flac_t *f = (flac_t *) client_data; | |
| 400 | 344 int pos; |
| 312 | 345 |
| 346 /* Maybe we could check for SOUND_SAMPLEFLAG_EOF here instead? */ | |
| 347 pos = SDL_RWtell(f->rw); | |
| 348 | |
| 349 if (pos >= 0 && pos >= f->stream_length) | |
| 350 { | |
| 351 return(true); | |
| 352 } /* if */ | |
| 353 | |
| 354 return(false); | |
| 355 } /* eof_callback */ | |
| 356 | |
| 155 | 357 |
| 358 static int FLAC_init(void) | |
| 359 { | |
| 360 return(1); /* always succeeds. */ | |
| 361 } /* FLAC_init */ | |
| 362 | |
| 363 | |
| 364 static void FLAC_quit(void) | |
| 365 { | |
| 366 /* it's a no-op. */ | |
| 367 } /* FLAC_quit */ | |
| 368 | |
| 369 | |
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370 #define FLAC_MAGIC 0x43614C66 /* "fLaC" in ASCII. */ |
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371 |
| 155 | 372 static int FLAC_open(Sound_Sample *sample, const char *ext) |
| 373 { | |
| 374 Sound_SampleInternal *internal = (Sound_SampleInternal *) sample->opaque; | |
| 375 SDL_RWops *rw = internal->rw; | |
| 312 | 376 decoder_t *decoder; |
| 155 | 377 flac_t *f; |
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378 int i; |
|
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379 int has_extension = 0; |
| 312 | 380 Uint32 pos; |
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381 |
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382 /* |
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383 * If the extension is "flac", we'll believe that this is really meant |
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384 * to be a FLAC stream, and will try to grok it from existing metadata. |
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385 * metadata searching can be a very expensive operation, however, so |
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386 * unless the user swears that it is a FLAC stream through the extension, |
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387 * we decide what to do based on the existance of a 32-bit magic number. |
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388 */ |
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389 for (i = 0; extensions_flac[i] != NULL; i++) |
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390 { |
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391 if (__Sound_strcasecmp(ext, extensions_flac[i]) == 0) |
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392 { |
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393 has_extension = 1; |
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394 break; |
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395 } /* if */ |
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396 } /* for */ |
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397 |
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398 if (!has_extension) |
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399 { |
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400 int rc; |
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401 Uint32 flac_magic = SDL_ReadLE32(rw); |
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402 BAIL_IF_MACRO(flac_magic != FLAC_MAGIC, "FLAC: Not a FLAC stream.", 0); |
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403 |
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404 /* move back over magic number for metadata scan... */ |
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405 rc = SDL_RWseek(internal->rw, -sizeof (flac_magic), SEEK_CUR); |
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406 BAIL_IF_MACRO(rc < 0, ERR_IO_ERROR, 0); |
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407 } /* if */ |
| 155 | 408 |
| 409 f = (flac_t *) malloc(sizeof (flac_t)); | |
| 410 BAIL_IF_MACRO(f == NULL, ERR_OUT_OF_MEMORY, 0); | |
| 411 | |
| 312 | 412 decoder = d_new(); |
| 155 | 413 if (decoder == NULL) |
| 414 { | |
| 415 free(f); | |
|
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416 BAIL_MACRO(ERR_OUT_OF_MEMORY, 0); |
| 155 | 417 } /* if */ |
| 418 | |
| 312 | 419 d_set_read_callback(decoder, read_callback); |
| 420 d_set_write_callback(decoder, write_callback); | |
| 421 d_set_metadata_callback(decoder, metadata_callback); | |
| 422 d_set_error_callback(decoder, error_callback); | |
| 423 d_set_seek_callback(decoder, seek_callback); | |
| 424 d_set_tell_callback(decoder, tell_callback); | |
| 425 d_set_length_callback(decoder, length_callback); | |
| 426 d_set_eof_callback(decoder, eof_callback); | |
|
422
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427 |
| 312 | 428 d_set_client_data(decoder, f); |
| 155 | 429 |
| 430 f->rw = internal->rw; | |
| 431 f->sample = sample; | |
| 432 f->decoder = decoder; | |
|
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433 f->sample->actual.format = 0; |
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434 f->is_flac = 0 /* !!! FIXME: should be "has_extension", not "0". */; |
|
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435 |
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436 internal->decoder_private = f; |
| 312 | 437 d_init(decoder); |
|
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438 |
| 400 | 439 sample->flags = SOUND_SAMPLEFLAG_NONE; |
| 440 | |
| 441 pos = SDL_RWtell(f->rw); | |
| 442 if (SDL_RWseek(f->rw, 0, SEEK_END) > 0) | |
| 443 { | |
| 444 f->stream_length = SDL_RWtell(f->rw); | |
| 445 if (SDL_RWseek(f->rw, pos, SEEK_SET) == -1) | |
| 446 { | |
| 447 free_flac(f); | |
| 448 BAIL_MACRO(ERR_IO_ERROR, 0); | |
| 449 } /* if */ | |
| 450 sample->flags = SOUND_SAMPLEFLAG_CANSEEK; | |
| 451 } /* if */ | |
| 452 | |
|
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453 /* |
|
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454 * If we are not sure this is a FLAC stream, check for the STREAMINFO |
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455 * metadata block. If not, we'd have to peek at the first audio frame |
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456 * and get the sound format from there, but that is not yet |
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457 * implemented. |
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458 */ |
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459 if (!f->is_flac) |
| 155 | 460 { |
| 312 | 461 d_process_metadata(decoder); |
|
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462 |
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463 /* Still not FLAC? Give up. */ |
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464 if (!f->is_flac) |
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465 { |
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466 free_flac(f); |
|
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467 BAIL_MACRO("FLAC: No metadata found. Not a FLAC stream?", 0); |
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468 } /* if */ |
| 155 | 469 } /* if */ |
| 470 | |
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471 SNDDBG(("FLAC: Accepting data stream.\n")); |
| 155 | 472 return(1); |
| 473 } /* FLAC_open */ | |
| 474 | |
| 475 | |
| 476 static void FLAC_close(Sound_Sample *sample) | |
| 477 { | |
| 478 Sound_SampleInternal *internal = (Sound_SampleInternal *) sample->opaque; | |
| 479 flac_t *f = (flac_t *) internal->decoder_private; | |
| 480 | |
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481 free_flac(f); |
| 155 | 482 } /* FLAC_close */ |
| 483 | |
| 484 | |
| 485 static Uint32 FLAC_read(Sound_Sample *sample) | |
| 486 { | |
| 487 Sound_SampleInternal *internal = (Sound_SampleInternal *) sample->opaque; | |
| 488 flac_t *f = (flac_t *) internal->decoder_private; | |
| 489 Uint32 len; | |
| 490 | |
| 312 | 491 if (!d_process_one_frame(f->decoder)) |
| 155 | 492 { |
| 493 sample->flags |= SOUND_SAMPLEFLAG_ERROR; | |
|
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494 BAIL_MACRO("FLAC: Couldn't decode frame.", 0); |
| 155 | 495 } /* if */ |
| 496 | |
| 312 | 497 if (d_get_state(f->decoder) == D_END_OF_STREAM) |
|
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498 { |
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499 sample->flags |= SOUND_SAMPLEFLAG_EOF; |
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500 return(0); |
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501 } /* if */ |
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502 |
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503 /* An error may have been signalled through the error callback. */ |
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504 if (sample->flags & SOUND_SAMPLEFLAG_ERROR) |
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505 return(0); |
|
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506 |
| 155 | 507 return(f->frame_size); |
| 508 } /* FLAC_read */ | |
| 509 | |
|
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510 |
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511 static int FLAC_rewind(Sound_Sample *sample) |
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512 { |
| 312 | 513 return FLAC_seek(sample, 0); |
|
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514 } /* FLAC_rewind */ |
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515 |
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Added framework for Sound_Seek() support.
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516 |
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Added framework for Sound_Seek() support.
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517 static int FLAC_seek(Sound_Sample *sample, Uint32 ms) |
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518 { |
| 312 | 519 Sound_SampleInternal *internal = (Sound_SampleInternal *) sample->opaque; |
| 520 flac_t *f = (flac_t *) internal->decoder_private; | |
| 521 | |
| 522 d_seek_absolute(f->decoder, (ms * sample->actual.rate) / 1000); | |
| 523 return(1); | |
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524 } /* FLAC_seek */ |
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525 |
| 155 | 526 #endif /* SOUND_SUPPORTS_FLAC */ |
| 527 | |
| 528 /* end of flac.c ... */ |