1/* libxmms-flac - XMMS FLAC input plugin 2 * Copyright (C) 2000,2001,2002,2003,2004,2005,2006,2007 Josh Coalson 3 * 4 * This program is free software; you can redistribute it and/or 5 * modify it under the terms of the GNU General Public License 6 * as published by the Free Software Foundation; either version 2 7 * of the License, or (at your option) any later version. 8 * 9 * This program is distributed in the hope that it will be useful, 10 * but WITHOUT ANY WARRANTY; without even the implied warranty of 11 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the 12 * GNU General Public License for more details. 13 * 14 * You should have received a copy of the GNU General Public License 15 * along with this program; if not, write to the Free Software 16 * Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA. 17 */ 18 19#if HAVE_CONFIG_H 20# include <config.h> 21#endif 22 23#include <limits.h> 24#include <pthread.h> 25#include <stdlib.h> 26#include <string.h> 27#include <stdio.h> 28#include <glib.h> 29#include <pwd.h> 30#include <sys/types.h> 31#include <unistd.h> 32 33#include <xmms/plugin.h> 34#include <xmms/util.h> 35#include <xmms/configfile.h> 36#include <xmms/titlestring.h> 37 38#ifdef HAVE_LANGINFO_CODESET 39#include <langinfo.h> 40#endif 41 42#include "FLAC/all.h" 43#include "plugin_common/all.h" 44#include "share/grabbag.h" 45#include "share/replaygain_synthesis.h" 46#include "configure.h" 47#include "charset.h" 48#include "http.h" 49#include "tag.h" 50 51#ifdef min 52#undef min 53#endif 54#define min(x,y) ((x)<(y)?(x):(y)) 55 56extern void FLAC_XMMS__file_info_box(char *filename); 57 58typedef struct { 59 FLAC__bool abort_flag; 60 FLAC__bool is_playing; 61 FLAC__bool is_http_source; 62 FLAC__bool eof; 63 FLAC__bool play_thread_open; /* if true, is_playing must also be true */ 64 FLAC__uint64 total_samples; 65 unsigned bits_per_sample; 66 unsigned channels; 67 unsigned sample_rate; 68 int length_in_msec; /* int (instead of FLAC__uint64) only because that's what XMMS uses; seeking won't work right if this maxes out */ 69 gchar *title; 70 AFormat sample_format; 71 unsigned sample_format_bytes_per_sample; 72 int seek_to_in_sec; 73 FLAC__bool has_replaygain; 74 double replay_scale; 75 DitherContext dither_context; 76} stream_data_struct; 77 78static void FLAC_XMMS__init(void); 79static int FLAC_XMMS__is_our_file(char *filename); 80static void FLAC_XMMS__play_file(char *filename); 81static void FLAC_XMMS__stop(void); 82static void FLAC_XMMS__pause(short p); 83static void FLAC_XMMS__seek(int time); 84static int FLAC_XMMS__get_time(void); 85static void FLAC_XMMS__cleanup(void); 86static void FLAC_XMMS__get_song_info(char *filename, char **title, int *length); 87 88static void *play_loop_(void *arg); 89 90static FLAC__bool safe_decoder_init_(const char *filename, FLAC__StreamDecoder *decoder); 91static void safe_decoder_finish_(FLAC__StreamDecoder *decoder); 92static void safe_decoder_delete_(FLAC__StreamDecoder *decoder); 93 94static FLAC__StreamDecoderReadStatus http_read_callback_(const FLAC__StreamDecoder *decoder, FLAC__byte buffer[], size_t *bytes, void *client_data); 95static FLAC__StreamDecoderWriteStatus write_callback_(const FLAC__StreamDecoder *decoder, const FLAC__Frame *frame, const FLAC__int32 * const buffer[], void *client_data); 96static void metadata_callback_(const FLAC__StreamDecoder *decoder, const FLAC__StreamMetadata *metadata, void *client_data); 97static void error_callback_(const FLAC__StreamDecoder *decoder, FLAC__StreamDecoderErrorStatus status, void *client_data); 98 99InputPlugin flac_ip = 100{ 101 NULL, 102 NULL, 103 "FLAC Player v" VERSION, 104 FLAC_XMMS__init, 105 FLAC_XMMS__aboutbox, 106 FLAC_XMMS__configure, 107 FLAC_XMMS__is_our_file, 108 NULL, 109 FLAC_XMMS__play_file, 110 FLAC_XMMS__stop, 111 FLAC_XMMS__pause, 112 FLAC_XMMS__seek, 113 NULL, 114 FLAC_XMMS__get_time, 115 NULL, 116 NULL, 117 FLAC_XMMS__cleanup, 118 NULL, 119 NULL, 120 NULL, 121 NULL, 122 FLAC_XMMS__get_song_info, 123 FLAC_XMMS__file_info_box, 124 NULL 125}; 126 127#define SAMPLES_PER_WRITE 512 128#define SAMPLE_BUFFER_SIZE ((FLAC__MAX_BLOCK_SIZE + SAMPLES_PER_WRITE) * FLAC_PLUGIN__MAX_SUPPORTED_CHANNELS * (24/8)) 129static FLAC__byte sample_buffer_[SAMPLE_BUFFER_SIZE]; 130static unsigned sample_buffer_first_, sample_buffer_last_; 131 132static FLAC__StreamDecoder *decoder_ = 0; 133static stream_data_struct stream_data_; 134static pthread_t decode_thread_; 135static FLAC__bool audio_error_ = false; 136static FLAC__bool is_big_endian_host_; 137 138#define BITRATE_HIST_SEGMENT_MSEC 500 139/* 500ms * 50 = 25s should be enough */ 140#define BITRATE_HIST_SIZE 50 141static unsigned bitrate_history_[BITRATE_HIST_SIZE]; 142 143 144InputPlugin *get_iplugin_info(void) 145{ 146 flac_ip.description = g_strdup_printf("Reference FLAC Player v%s", FLAC__VERSION_STRING); 147 return &flac_ip; 148} 149 150void set_track_info(const char* title, int length_in_msec) 151{ 152 if (stream_data_.is_playing) { 153 flac_ip.set_info((char*) title, length_in_msec, stream_data_.sample_rate * stream_data_.channels * stream_data_.bits_per_sample, stream_data_.sample_rate, stream_data_.channels); 154 } 155} 156 157static gchar* homedir(void) 158{ 159 gchar *result; 160 char *env_home = getenv("HOME"); 161 if (env_home) { 162 result = g_strdup (env_home); 163 } else { 164 uid_t uid = getuid(); 165 struct passwd *pwent; 166 do { 167 pwent = getpwent(); 168 } while (pwent && pwent->pw_uid != uid); 169 result = pwent ? g_strdup (pwent->pw_dir) : NULL; 170 endpwent(); 171 } 172 return result; 173} 174 175static FLAC__bool is_http_source(const char *source) 176{ 177 return 0 == strncasecmp(source, "http://", 7); 178} 179 180void FLAC_XMMS__init(void) 181{ 182 ConfigFile *cfg; 183 FLAC__uint32 test = 1; 184 185 is_big_endian_host_ = (*((FLAC__byte*)(&test)))? false : true; 186 187 flac_cfg.title.tag_override = FALSE; 188 if (flac_cfg.title.tag_format) 189 g_free(flac_cfg.title.tag_format); 190 flac_cfg.title.convert_char_set = FALSE; 191 192 cfg = xmms_cfg_open_default_file(); 193 194 /* title */ 195 196 xmms_cfg_read_boolean(cfg, "flac", "title.tag_override", &flac_cfg.title.tag_override); 197 198 if(!xmms_cfg_read_string(cfg, "flac", "title.tag_format", &flac_cfg.title.tag_format)) 199 flac_cfg.title.tag_format = g_strdup("%p - %t"); 200 201 xmms_cfg_read_boolean(cfg, "flac", "title.convert_char_set", &flac_cfg.title.convert_char_set); 202 203 if(!xmms_cfg_read_string(cfg, "flac", "title.user_char_set", &flac_cfg.title.user_char_set)) 204 flac_cfg.title.user_char_set = FLAC_plugin__charset_get_current(); 205 206 /* replaygain */ 207 208 xmms_cfg_read_boolean(cfg, "flac", "output.replaygain.enable", &flac_cfg.output.replaygain.enable); 209 210 xmms_cfg_read_boolean(cfg, "flac", "output.replaygain.album_mode", &flac_cfg.output.replaygain.album_mode); 211 212 if(!xmms_cfg_read_int(cfg, "flac", "output.replaygain.preamp", &flac_cfg.output.replaygain.preamp)) 213 flac_cfg.output.replaygain.preamp = 0; 214 215 xmms_cfg_read_boolean(cfg, "flac", "output.replaygain.hard_limit", &flac_cfg.output.replaygain.hard_limit); 216 217 xmms_cfg_read_boolean(cfg, "flac", "output.resolution.normal.dither_24_to_16", &flac_cfg.output.resolution.normal.dither_24_to_16); 218 xmms_cfg_read_boolean(cfg, "flac", "output.resolution.replaygain.dither", &flac_cfg.output.resolution.replaygain.dither); 219 220 if(!xmms_cfg_read_int(cfg, "flac", "output.resolution.replaygain.noise_shaping", &flac_cfg.output.resolution.replaygain.noise_shaping)) 221 flac_cfg.output.resolution.replaygain.noise_shaping = 1; 222 223 if(!xmms_cfg_read_int(cfg, "flac", "output.resolution.replaygain.bps_out", &flac_cfg.output.resolution.replaygain.bps_out)) 224 flac_cfg.output.resolution.replaygain.bps_out = 16; 225 226 /* stream */ 227 228 xmms_cfg_read_int(cfg, "flac", "stream.http_buffer_size", &flac_cfg.stream.http_buffer_size); 229 xmms_cfg_read_int(cfg, "flac", "stream.http_prebuffer", &flac_cfg.stream.http_prebuffer); 230 xmms_cfg_read_boolean(cfg, "flac", "stream.use_proxy", &flac_cfg.stream.use_proxy); 231 if(flac_cfg.stream.proxy_host) 232 g_free(flac_cfg.stream.proxy_host); 233 if(!xmms_cfg_read_string(cfg, "flac", "stream.proxy_host", &flac_cfg.stream.proxy_host)) 234 flac_cfg.stream.proxy_host = g_strdup(""); 235 xmms_cfg_read_int(cfg, "flac", "stream.proxy_port", &flac_cfg.stream.proxy_port); 236 xmms_cfg_read_boolean(cfg, "flac", "stream.proxy_use_auth", &flac_cfg.stream.proxy_use_auth); 237 if(flac_cfg.stream.proxy_user) 238 g_free(flac_cfg.stream.proxy_user); 239 flac_cfg.stream.proxy_user = NULL; 240 xmms_cfg_read_string(cfg, "flac", "stream.proxy_user", &flac_cfg.stream.proxy_user); 241 if(flac_cfg.stream.proxy_pass) 242 g_free(flac_cfg.stream.proxy_pass); 243 flac_cfg.stream.proxy_pass = NULL; 244 xmms_cfg_read_string(cfg, "flac", "stream.proxy_pass", &flac_cfg.stream.proxy_pass); 245 xmms_cfg_read_boolean(cfg, "flac", "stream.save_http_stream", &flac_cfg.stream.save_http_stream); 246 if (flac_cfg.stream.save_http_path) 247 g_free (flac_cfg.stream.save_http_path); 248 if (!xmms_cfg_read_string(cfg, "flac", "stream.save_http_path", &flac_cfg.stream.save_http_path) || ! *flac_cfg.stream.save_http_path) { 249 if (flac_cfg.stream.save_http_path) 250 g_free (flac_cfg.stream.save_http_path); 251 flac_cfg.stream.save_http_path = homedir(); 252 } 253 xmms_cfg_read_boolean(cfg, "flac", "stream.cast_title_streaming", &flac_cfg.stream.cast_title_streaming); 254 xmms_cfg_read_boolean(cfg, "flac", "stream.use_udp_channel", &flac_cfg.stream.use_udp_channel); 255 256 decoder_ = FLAC__stream_decoder_new(); 257 258 xmms_cfg_free(cfg); 259} 260 261int FLAC_XMMS__is_our_file(char *filename) 262{ 263 char *ext; 264 265 ext = strrchr(filename, '.'); 266 if(ext) 267 if(!strcasecmp(ext, ".flac") || !strcasecmp(ext, ".fla")) 268 return 1; 269 return 0; 270} 271 272void FLAC_XMMS__play_file(char *filename) 273{ 274 FILE *f; 275 276 sample_buffer_first_ = sample_buffer_last_ = 0; 277 audio_error_ = false; 278 stream_data_.abort_flag = false; 279 stream_data_.is_playing = false; 280 stream_data_.is_http_source = is_http_source(filename); 281 stream_data_.eof = false; 282 stream_data_.play_thread_open = false; 283 stream_data_.has_replaygain = false; 284 285 if(!is_http_source(filename)) { 286 if(0 == (f = fopen(filename, "r"))) 287 return; 288 fclose(f); 289 } 290 291 if(decoder_ == 0) 292 return; 293 294 if(!safe_decoder_init_(filename, decoder_)) 295 return; 296 297 if(stream_data_.has_replaygain && flac_cfg.output.replaygain.enable) { 298 if(flac_cfg.output.resolution.replaygain.bps_out == 8) { 299 stream_data_.sample_format = FMT_U8; 300 stream_data_.sample_format_bytes_per_sample = 1; 301 } 302 else if(flac_cfg.output.resolution.replaygain.bps_out == 16) { 303 stream_data_.sample_format = (is_big_endian_host_) ? FMT_S16_BE : FMT_S16_LE; 304 stream_data_.sample_format_bytes_per_sample = 2; 305 } 306 else { 307 /*@@@ need some error here like wa2: MessageBox(mod_.hMainWindow, "ERROR: plugin can only handle 8/16-bit samples\n", "ERROR: plugin can only handle 8/16-bit samples", 0); */ 308 fprintf(stderr, "libxmms-flac: can't handle %d bit output\n", flac_cfg.output.resolution.replaygain.bps_out); 309 safe_decoder_finish_(decoder_); 310 return; 311 } 312 } 313 else { 314 if(stream_data_.bits_per_sample == 8) { 315 stream_data_.sample_format = FMT_U8; 316 stream_data_.sample_format_bytes_per_sample = 1; 317 } 318 else if(stream_data_.bits_per_sample == 16 || (stream_data_.bits_per_sample == 24 && flac_cfg.output.resolution.normal.dither_24_to_16)) { 319 stream_data_.sample_format = (is_big_endian_host_) ? FMT_S16_BE : FMT_S16_LE; 320 stream_data_.sample_format_bytes_per_sample = 2; 321 } 322 else { 323 /*@@@ need some error here like wa2: MessageBox(mod_.hMainWindow, "ERROR: plugin can only handle 8/16-bit samples\n", "ERROR: plugin can only handle 8/16-bit samples", 0); */ 324 fprintf(stderr, "libxmms-flac: can't handle %d bit output\n", stream_data_.bits_per_sample); 325 safe_decoder_finish_(decoder_); 326 return; 327 } 328 } 329 FLAC__replaygain_synthesis__init_dither_context(&stream_data_.dither_context, stream_data_.sample_format_bytes_per_sample * 8, flac_cfg.output.resolution.replaygain.noise_shaping); 330 stream_data_.is_playing = true; 331 332 if(flac_ip.output->open_audio(stream_data_.sample_format, stream_data_.sample_rate, stream_data_.channels) == 0) { 333 audio_error_ = true; 334 safe_decoder_finish_(decoder_); 335 return; 336 } 337 338 stream_data_.title = flac_format_song_title(filename); 339 flac_ip.set_info(stream_data_.title, stream_data_.length_in_msec, stream_data_.sample_rate * stream_data_.channels * stream_data_.bits_per_sample, stream_data_.sample_rate, stream_data_.channels); 340 341 stream_data_.seek_to_in_sec = -1; 342 stream_data_.play_thread_open = true; 343 pthread_create(&decode_thread_, NULL, play_loop_, NULL); 344} 345 346void FLAC_XMMS__stop(void) 347{ 348 if(stream_data_.is_playing) { 349 stream_data_.is_playing = false; 350 if(stream_data_.play_thread_open) { 351 stream_data_.play_thread_open = false; 352 pthread_join(decode_thread_, NULL); 353 } 354 flac_ip.output->close_audio(); 355 safe_decoder_finish_(decoder_); 356 } 357} 358 359void FLAC_XMMS__pause(short p) 360{ 361 flac_ip.output->pause(p); 362} 363 364void FLAC_XMMS__seek(int time) 365{ 366 if(!stream_data_.is_http_source) { 367 stream_data_.seek_to_in_sec = time; 368 stream_data_.eof = false; 369 370 while(stream_data_.seek_to_in_sec != -1) 371 xmms_usleep(10000); 372 } 373} 374 375int FLAC_XMMS__get_time(void) 376{ 377 if(audio_error_) 378 return -2; 379 if(!stream_data_.is_playing || (stream_data_.eof && !flac_ip.output->buffer_playing())) 380 return -1; 381 else 382 return flac_ip.output->output_time(); 383} 384 385void FLAC_XMMS__cleanup(void) 386{ 387 safe_decoder_delete_(decoder_); 388 decoder_ = 0; 389} 390 391void FLAC_XMMS__get_song_info(char *filename, char **title, int *length_in_msec) 392{ 393 FLAC__StreamMetadata streaminfo; 394 395 if(0 == filename) 396 filename = ""; 397 398 if(!FLAC__metadata_get_streaminfo(filename, &streaminfo)) { 399 /* @@@ how to report the error? */ 400 if(title) { 401 if (!is_http_source(filename)) { 402 static const char *errtitle = "Invalid FLAC File: "; 403 if(strlen(errtitle) + 1 + strlen(filename) + 1 + 1 < strlen(filename)) { /* overflow check */ 404 *title = NULL; 405 } 406 else { 407 *title = g_malloc(strlen(errtitle) + 1 + strlen(filename) + 1 + 1); 408 sprintf(*title, "%s\"%s\"", errtitle, filename); 409 } 410 } else { 411 *title = NULL; 412 } 413 } 414 if(length_in_msec) 415 *length_in_msec = -1; 416 return; 417 } 418 419 if(title) { 420 *title = flac_format_song_title(filename); 421 } 422 if(length_in_msec) { 423 FLAC__uint64 l = (FLAC__uint64)((double)streaminfo.data.stream_info.total_samples / (double)streaminfo.data.stream_info.sample_rate * 1000.0 + 0.5); 424 if (l > INT_MAX) 425 l = INT_MAX; 426 *length_in_msec = (int)l; 427 } 428} 429 430/*********************************************************************** 431 * local routines 432 **********************************************************************/ 433 434void *play_loop_(void *arg) 435{ 436 unsigned written_time_last = 0, bh_index_last_w = 0, bh_index_last_o = BITRATE_HIST_SIZE, blocksize = 1; 437 FLAC__uint64 decode_position_last = 0, decode_position_frame_last = 0, decode_position_frame = 0; 438 439 (void)arg; 440 441 while(stream_data_.is_playing) { 442 if(!stream_data_.eof) { 443 while(sample_buffer_last_ - sample_buffer_first_ < SAMPLES_PER_WRITE) { 444 unsigned s; 445 446 s = sample_buffer_last_ - sample_buffer_first_; 447 if(FLAC__stream_decoder_get_state(decoder_) == FLAC__STREAM_DECODER_END_OF_STREAM) { 448 stream_data_.eof = true; 449 break; 450 } 451 else if(!FLAC__stream_decoder_process_single(decoder_)) { 452 /*@@@ this should probably be a dialog */ 453 fprintf(stderr, "libxmms-flac: READ ERROR processing frame\n"); 454 stream_data_.eof = true; 455 break; 456 } 457 blocksize = sample_buffer_last_ - sample_buffer_first_ - s; 458 decode_position_frame_last = decode_position_frame; 459 if(stream_data_.is_http_source || !FLAC__stream_decoder_get_decode_position(decoder_, &decode_position_frame)) 460 decode_position_frame = 0; 461 } 462 if(sample_buffer_last_ - sample_buffer_first_ > 0) { 463 const unsigned n = min(sample_buffer_last_ - sample_buffer_first_, SAMPLES_PER_WRITE); 464 int bytes = n * stream_data_.channels * stream_data_.sample_format_bytes_per_sample; 465 FLAC__byte *sample_buffer_start = sample_buffer_ + sample_buffer_first_ * stream_data_.channels * stream_data_.sample_format_bytes_per_sample; 466 unsigned written_time, bh_index_w; 467 FLAC__uint64 decode_position; 468 469 sample_buffer_first_ += n; 470 flac_ip.add_vis_pcm(flac_ip.output->written_time(), stream_data_.sample_format, stream_data_.channels, bytes, sample_buffer_start); 471 while(flac_ip.output->buffer_free() < (int)bytes && stream_data_.is_playing && stream_data_.seek_to_in_sec == -1) 472 xmms_usleep(10000); 473 if(stream_data_.is_playing && stream_data_.seek_to_in_sec == -1) 474 flac_ip.output->write_audio(sample_buffer_start, bytes); 475 476 /* compute current bitrate */ 477 478 written_time = flac_ip.output->written_time(); 479 bh_index_w = written_time / BITRATE_HIST_SEGMENT_MSEC % BITRATE_HIST_SIZE; 480 if(bh_index_w != bh_index_last_w) { 481 bh_index_last_w = bh_index_w; 482 decode_position = decode_position_frame - (double)(sample_buffer_last_ - sample_buffer_first_) * (double)(decode_position_frame - decode_position_frame_last) / (double)blocksize; 483 bitrate_history_[(bh_index_w + BITRATE_HIST_SIZE - 1) % BITRATE_HIST_SIZE] = 484 decode_position > decode_position_last && written_time > written_time_last ? 485 8000 * (decode_position - decode_position_last) / (written_time - written_time_last) : 486 stream_data_.sample_rate * stream_data_.channels * stream_data_.bits_per_sample; 487 decode_position_last = decode_position; 488 written_time_last = written_time; 489 } 490 } 491 else { 492 stream_data_.eof = true; 493 xmms_usleep(10000); 494 } 495 } 496 else 497 xmms_usleep(10000); 498 if(!stream_data_.is_http_source && stream_data_.seek_to_in_sec != -1) { 499 const double distance = (double)stream_data_.seek_to_in_sec * 1000.0 / (double)stream_data_.length_in_msec; 500 FLAC__uint64 target_sample = (FLAC__uint64)(distance * (double)stream_data_.total_samples); 501 if(stream_data_.total_samples > 0 && target_sample >= stream_data_.total_samples) 502 target_sample = stream_data_.total_samples - 1; 503 if(FLAC__stream_decoder_seek_absolute(decoder_, target_sample)) { 504 flac_ip.output->flush(stream_data_.seek_to_in_sec * 1000); 505 bh_index_last_w = bh_index_last_o = flac_ip.output->output_time() / BITRATE_HIST_SEGMENT_MSEC % BITRATE_HIST_SIZE; 506 if(!FLAC__stream_decoder_get_decode_position(decoder_, &decode_position_frame)) 507 decode_position_frame = 0; 508 stream_data_.eof = false; 509 sample_buffer_first_ = sample_buffer_last_ = 0; 510 } 511 else if(FLAC__stream_decoder_get_state(decoder_) == FLAC__STREAM_DECODER_SEEK_ERROR) { 512 /*@@@ this should probably be a dialog */ 513 fprintf(stderr, "libxmms-flac: SEEK ERROR\n"); 514 FLAC__stream_decoder_flush(decoder_); 515 stream_data_.eof = false; 516 sample_buffer_first_ = sample_buffer_last_ = 0; 517 } 518 stream_data_.seek_to_in_sec = -1; 519 } 520 else { 521 /* display the right bitrate from history */ 522 unsigned bh_index_o = flac_ip.output->output_time() / BITRATE_HIST_SEGMENT_MSEC % BITRATE_HIST_SIZE; 523 if(bh_index_o != bh_index_last_o && bh_index_o != bh_index_last_w && bh_index_o != (bh_index_last_w + 1) % BITRATE_HIST_SIZE) { 524 bh_index_last_o = bh_index_o; 525 flac_ip.set_info(stream_data_.title, stream_data_.length_in_msec, bitrate_history_[bh_index_o], stream_data_.sample_rate, stream_data_.channels); 526 } 527 } 528 } 529 530 safe_decoder_finish_(decoder_); 531 532 /* are these two calls necessary? */ 533 flac_ip.output->buffer_free(); 534 flac_ip.output->buffer_free(); 535 536 g_free(stream_data_.title); 537 538 pthread_exit(NULL); 539 return 0; /* to silence the compiler warning about not returning a value */ 540} 541 542FLAC__bool safe_decoder_init_(const char *filename, FLAC__StreamDecoder *decoder) 543{ 544 if(decoder == 0) 545 return false; 546 547 safe_decoder_finish_(decoder); 548 549 FLAC__stream_decoder_set_md5_checking(decoder, false); 550 FLAC__stream_decoder_set_metadata_ignore_all(decoder); 551 FLAC__stream_decoder_set_metadata_respond(decoder, FLAC__METADATA_TYPE_STREAMINFO); 552 FLAC__stream_decoder_set_metadata_respond(decoder, FLAC__METADATA_TYPE_VORBIS_COMMENT); 553 if(stream_data_.is_http_source) { 554 flac_http_open(filename, 0); 555 if(FLAC__stream_decoder_init_stream(decoder, http_read_callback_, /*seek_callback=*/0, /*tell_callback=*/0, /*length_callback=*/0, /*eof_callback=*/0, write_callback_, metadata_callback_, error_callback_, /*client_data=*/&stream_data_) != FLAC__STREAM_DECODER_INIT_STATUS_OK) 556 return false; 557 } 558 else { 559 if(FLAC__stream_decoder_init_file(decoder, filename, write_callback_, metadata_callback_, error_callback_, /*client_data=*/&stream_data_) != FLAC__STREAM_DECODER_INIT_STATUS_OK) 560 return false; 561 } 562 563 if(!FLAC__stream_decoder_process_until_end_of_metadata(decoder)) 564 return false; 565 566 return true; 567} 568 569void safe_decoder_finish_(FLAC__StreamDecoder *decoder) 570{ 571 if(decoder && FLAC__stream_decoder_get_state(decoder) != FLAC__STREAM_DECODER_UNINITIALIZED) 572 (void)FLAC__stream_decoder_finish(decoder); 573 if(stream_data_.is_http_source) 574 flac_http_close(); 575} 576 577void safe_decoder_delete_(FLAC__StreamDecoder *decoder) 578{ 579 if(decoder) { 580 safe_decoder_finish_(decoder); 581 FLAC__stream_decoder_delete(decoder); 582 } 583} 584 585FLAC__StreamDecoderReadStatus http_read_callback_(const FLAC__StreamDecoder *decoder, FLAC__byte buffer[], size_t *bytes, void *client_data) 586{ 587 (void)decoder; 588 (void)client_data; 589 *bytes = flac_http_read(buffer, *bytes); 590 return *bytes ? FLAC__STREAM_DECODER_READ_STATUS_CONTINUE : FLAC__STREAM_DECODER_READ_STATUS_END_OF_STREAM; 591} 592 593FLAC__StreamDecoderWriteStatus write_callback_(const FLAC__StreamDecoder *decoder, const FLAC__Frame *frame, const FLAC__int32 * const buffer[], void *client_data) 594{ 595 stream_data_struct *stream_data = (stream_data_struct *)client_data; 596 const unsigned channels = stream_data->channels, wide_samples = frame->header.blocksize; 597 const unsigned bits_per_sample = stream_data->bits_per_sample; 598 FLAC__byte *sample_buffer_start; 599 600 (void)decoder; 601 602 if(stream_data->abort_flag) 603 return FLAC__STREAM_DECODER_WRITE_STATUS_ABORT; 604 605 if((sample_buffer_last_ + wide_samples) > (SAMPLE_BUFFER_SIZE / (channels * stream_data->sample_format_bytes_per_sample))) { 606 memmove(sample_buffer_, sample_buffer_ + sample_buffer_first_ * channels * stream_data->sample_format_bytes_per_sample, (sample_buffer_last_ - sample_buffer_first_) * channels * stream_data->sample_format_bytes_per_sample); 607 sample_buffer_last_ -= sample_buffer_first_; 608 sample_buffer_first_ = 0; 609 } 610 sample_buffer_start = sample_buffer_ + sample_buffer_last_ * channels * stream_data->sample_format_bytes_per_sample; 611 if(stream_data->has_replaygain && flac_cfg.output.replaygain.enable) { 612 FLAC__replaygain_synthesis__apply_gain( 613 sample_buffer_start, 614 !is_big_endian_host_, 615 stream_data->sample_format_bytes_per_sample == 1, /* unsigned_data_out */ 616 buffer, 617 wide_samples, 618 channels, 619 bits_per_sample, 620 stream_data->sample_format_bytes_per_sample * 8, 621 stream_data->replay_scale, 622 flac_cfg.output.replaygain.hard_limit, 623 flac_cfg.output.resolution.replaygain.dither, 624 &stream_data->dither_context 625 ); 626 } 627 else if(is_big_endian_host_) { 628 FLAC__plugin_common__pack_pcm_signed_big_endian( 629 sample_buffer_start, 630 buffer, 631 wide_samples, 632 channels, 633 bits_per_sample, 634 stream_data->sample_format_bytes_per_sample * 8 635 ); 636 } 637 else { 638 FLAC__plugin_common__pack_pcm_signed_little_endian( 639 sample_buffer_start, 640 buffer, 641 wide_samples, 642 channels, 643 bits_per_sample, 644 stream_data->sample_format_bytes_per_sample * 8 645 ); 646 } 647 648 sample_buffer_last_ += wide_samples; 649 650 return FLAC__STREAM_DECODER_WRITE_STATUS_CONTINUE; 651} 652 653void metadata_callback_(const FLAC__StreamDecoder *decoder, const FLAC__StreamMetadata *metadata, void *client_data) 654{ 655 stream_data_struct *stream_data = (stream_data_struct *)client_data; 656 (void)decoder; 657 if(metadata->type == FLAC__METADATA_TYPE_STREAMINFO) { 658 stream_data->total_samples = metadata->data.stream_info.total_samples; 659 stream_data->bits_per_sample = metadata->data.stream_info.bits_per_sample; 660 stream_data->channels = metadata->data.stream_info.channels; 661 stream_data->sample_rate = metadata->data.stream_info.sample_rate; 662 { 663 FLAC__uint64 l = (FLAC__uint64)((double)stream_data->total_samples / (double)stream_data->sample_rate * 1000.0 + 0.5); 664 if (l > INT_MAX) 665 l = INT_MAX; 666 stream_data->length_in_msec = (int)l; 667 } 668 } 669 else if(metadata->type == FLAC__METADATA_TYPE_VORBIS_COMMENT) { 670 double reference, gain, peak; 671 if(grabbag__replaygain_load_from_vorbiscomment(metadata, flac_cfg.output.replaygain.album_mode, /*strict=*/false, &reference, &gain, &peak)) { 672 stream_data->has_replaygain = true; 673 stream_data->replay_scale = grabbag__replaygain_compute_scale_factor(peak, gain, (double)flac_cfg.output.replaygain.preamp, /*prevent_clipping=*/!flac_cfg.output.replaygain.hard_limit); 674 } 675 } 676} 677 678void error_callback_(const FLAC__StreamDecoder *decoder, FLAC__StreamDecoderErrorStatus status, void *client_data) 679{ 680 stream_data_struct *stream_data = (stream_data_struct *)client_data; 681 (void)decoder; 682 if(status != FLAC__STREAM_DECODER_ERROR_STATUS_LOST_SYNC) 683 stream_data->abort_flag = true; 684} 685