src/plugin_xmms/plugin.c

   1 /* libxmms-flac - XMMS FLAC input plugin
   2  * Copyright (C) 2000,2001,2002  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 #include <pthread.h>
  20 #include <stdlib.h>
  21 #include <string.h>
  22 #include <stdio.h>
  23 #include <glib.h>
  24
  25 #include <xmms/plugin.h>
  26 #include <xmms/util.h>
  27 #include <xmms/configfile.h>
  28 #include <xmms/titlestring.h>
  29
  30 #ifdef HAVE_LANGINFO_CODESET
  31 #include <langinfo.h>
  32 #endif
  33
  34 #include "FLAC/all.h"
  35 #include "plugin_common/all.h"
  36 #include "configure.h"
  37 #include "wrap_id3.h"
  38 #include "charset.h"
  39
  40 #ifdef min
  41 #undef min
  42 #endif
  43 #define min(x,y) ((x)<(y)?(x):(y))
  44
  45 #define FLAC__DO_DITHER
  46
  47 typedef struct {
  48         FLAC__bool abort_flag;
  49         FLAC__bool is_playing;
  50         FLAC__bool eof;
  51         FLAC__bool play_thread_open; /* if true, is_playing must also be true */
  52         unsigned total_samples;
  53         unsigned bits_per_sample;
  54         unsigned channels;
  55         unsigned sample_rate;
  56         unsigned length_in_msec;
  57         AFormat sample_format;
  58         int seek_to_in_sec;
  59 } file_info_struct;
  60
  61 static void FLAC_XMMS__init();
  62 static int  FLAC_XMMS__is_our_file(char *filename);
  63 static void FLAC_XMMS__play_file(char *filename);
  64 static void FLAC_XMMS__stop();
  65 static void FLAC_XMMS__pause(short p);
  66 static void FLAC_XMMS__seek(int time);
  67 static int  FLAC_XMMS__get_time();
  68 static void FLAC_XMMS__cleanup();
  69 static void FLAC_XMMS__get_song_info(char *filename, char **title, int *length);
  70
  71 static void *play_loop_(void *arg);
  72 static FLAC__bool safe_decoder_init_(const char *filename, FLAC__FileDecoder *decoder);
  73 static void safe_decoder_finish_(FLAC__FileDecoder *decoder);
  74 static void safe_decoder_delete_(FLAC__FileDecoder *decoder);
  75 static FLAC__StreamDecoderWriteStatus write_callback_(const FLAC__FileDecoder *decoder, const FLAC__Frame *frame, const FLAC__int32 * const buffer[], void *client_data);
  76 static void metadata_callback_(const FLAC__FileDecoder *decoder, const FLAC__StreamMetadata *metadata, void *client_data);
  77 static void error_callback_(const FLAC__FileDecoder *decoder, FLAC__StreamDecoderErrorStatus status, void *client_data);
  78
  79 InputPlugin flac_ip =
  80 {
  81         NULL,
  82         NULL,
  83         "Reference FLAC Player v" FLAC__VERSION_STRING,
  84         FLAC_XMMS__init,
  85         FLAC_XMMS__aboutbox,
  86         FLAC_XMMS__configure,
  87         FLAC_XMMS__is_our_file,
  88         NULL,
  89         FLAC_XMMS__play_file,
  90         FLAC_XMMS__stop,
  91         FLAC_XMMS__pause,
  92         FLAC_XMMS__seek,
  93         NULL,
  94         FLAC_XMMS__get_time,
  95         NULL,
  96         NULL,
  97         FLAC_XMMS__cleanup,
  98         NULL,
  99         NULL,
 100         NULL,
 101         NULL,
 102         FLAC_XMMS__get_song_info,
 103         NULL,           /* file_info_box */
 104         NULL
 105 };
 106
 107 #define SAMPLES_PER_WRITE 512
 108 static FLAC__int32 reservoir_[FLAC__MAX_BLOCK_SIZE * 2/*for overflow*/ * FLAC_PLUGIN__MAX_SUPPORTED_CHANNELS];
 109 static FLAC__byte sample_buffer_[SAMPLES_PER_WRITE * FLAC_PLUGIN__MAX_SUPPORTED_CHANNELS * (24/8)]; /* (24/8) for max bytes per sample */
 110 static unsigned wide_samples_in_reservoir_ = 0;
 111 static FLAC__FileDecoder *decoder_ = 0;
 112 static file_info_struct file_info_;
 113 static pthread_t decode_thread_;
 114 static FLAC__bool audio_error_ = false;
 115
 116 InputPlugin *get_iplugin_info()
 117 {
 118         flac_ip.description = g_strdup_printf("Reference FLAC Player v%s", FLAC__VERSION_STRING);
 119         return &flac_ip;
 120 }
 121
 122 void FLAC_XMMS__init()
 123 {
 124         ConfigFile *cfg;
 125
 126         flac_cfg.tag_override = FALSE;
 127         g_free(flac_cfg.tag_format);
 128         flac_cfg.convert_char_set = FALSE;
 129
 130         cfg = xmms_cfg_open_default_file();
 131
 132         xmms_cfg_read_boolean(cfg, "flac", "tag_override", &flac_cfg.tag_override);
 133
 134         if(!xmms_cfg_read_string(cfg, "flac", "tag_format", &flac_cfg.tag_format))
 135                 flac_cfg.tag_format = g_strdup("%p - %t");
 136
 137         xmms_cfg_read_boolean(cfg, "flac", "convert_char_set", &flac_cfg.convert_char_set);
 138
 139         if(!xmms_cfg_read_string(cfg, "flac", "file_char_set", &flac_cfg.file_char_set))
 140                 flac_cfg.file_char_set = FLAC_plugin__charset_get_current();
 141
 142         if(!xmms_cfg_read_string(cfg, "flac", "user_char_set", &flac_cfg.user_char_set))
 143                 flac_cfg.user_char_set = FLAC_plugin__charset_get_current();
 144
 145         decoder_ = FLAC__file_decoder_new();
 146 }
 147
 148 int FLAC_XMMS__is_our_file(char *filename)
 149 {
 150         char *ext;
 151
 152         ext = strrchr(filename, '.');
 153         if(ext)
 154                 if(!strcasecmp(ext, ".flac") || !strcasecmp(ext, ".fla"))
 155                         return 1;
 156         return 0;
 157 }
 158
 159 void FLAC_XMMS__play_file(char *filename)
 160 {
 161         FILE *f;
 162         gchar *ret;
 163
 164         wide_samples_in_reservoir_ = 0;
 165         audio_error_ = false;
 166         file_info_.abort_flag = false;
 167         file_info_.is_playing = false;
 168         file_info_.eof = false;
 169         file_info_.play_thread_open = false;
 170
 171         if(0 == (f = fopen(filename, "r")))
 172                 return;
 173         fclose(f);
 174
 175         if(decoder_ == 0)
 176                 return;
 177
 178         if(!safe_decoder_init_(filename, decoder_))
 179                 return;
 180
 181         file_info_.is_playing = true;
 182
 183         if(flac_ip.output->open_audio(file_info_.sample_format, file_info_.sample_rate, file_info_.channels) == 0) {
 184                 audio_error_ = true;
 185                 safe_decoder_finish_(decoder_);
 186                 return;
 187         }
 188
 189         ret = flac_format_song_title(filename);
 190         flac_ip.set_info(ret, file_info_.length_in_msec, file_info_.sample_rate * file_info_.channels * file_info_.bits_per_sample, file_info_.sample_rate, file_info_.channels);
 191
 192         g_free(ret);
 193
 194         file_info_.seek_to_in_sec = -1;
 195         file_info_.play_thread_open = true;
 196         pthread_create(&decode_thread_, NULL, play_loop_, NULL);
 197 }
 198
 199 void FLAC_XMMS__stop()
 200 {
 201         if(file_info_.is_playing) {
 202                 file_info_.is_playing = false;
 203                 if(file_info_.play_thread_open) {
 204                         file_info_.play_thread_open = false;
 205                         pthread_join(decode_thread_, NULL);
 206                 }
 207                 flac_ip.output->close_audio();
 208                 safe_decoder_finish_(decoder_);
 209         }
 210 }
 211
 212 void FLAC_XMMS__pause(short p)
 213 {
 214         flac_ip.output->pause(p);
 215 }
 216
 217 void FLAC_XMMS__seek(int time)
 218 {
 219         file_info_.seek_to_in_sec = time;
 220         file_info_.eof = false;
 221
 222         while(file_info_.seek_to_in_sec != -1)
 223                 xmms_usleep(10000);
 224 }
 225
 226 int FLAC_XMMS__get_time()
 227 {
 228         if(audio_error_)
 229                 return -2;
 230         if(!file_info_.is_playing || (file_info_.eof && !flac_ip.output->buffer_playing()))
 231                 return -1;
 232         else
 233                 return flac_ip.output->output_time();
 234 }
 235
 236 void FLAC_XMMS__cleanup()
 237 {
 238         safe_decoder_delete_(decoder_);
 239         decoder_ = 0;
 240 }
 241
 242 void FLAC_XMMS__get_song_info(char *filename, char **title, int *length_in_msec)
 243 {
 244         FLAC__StreamMetadata streaminfo;
 245
 246         if(0 == filename)
 247                 filename = "";
 248
 249         if(!FLAC__metadata_get_streaminfo(filename, &streaminfo)) {
 250                 /* @@@ how to report the error? */
 251                 if(title) {
 252                         static const char *errtitle = "Invalid FLAC File: ";
 253                         *title = g_malloc(strlen(errtitle) + 1 + strlen(filename) + 1 + 1);
 254                         sprintf(*title, "%s\"%s\"", errtitle, filename);
 255                 }
 256                 if(length_in_msec)
 257                         *length_in_msec = -1;
 258                 return;
 259         }
 260
 261         if(title) {
 262                 *title = flac_format_song_title(filename);
 263         }
 264         if(length_in_msec)
 265                 *length_in_msec = streaminfo.data.stream_info.total_samples * 10 / (streaminfo.data.stream_info.sample_rate / 100);
 266 }
 267
 268 /***********************************************************************
 269  * local routines
 270  **********************************************************************/
 271
 272 void *play_loop_(void *arg)
 273 {
 274         (void)arg;
 275
 276         while(file_info_.is_playing) {
 277                 if(!file_info_.eof) {
 278                         while(wide_samples_in_reservoir_ < SAMPLES_PER_WRITE) {
 279                                 if(FLAC__file_decoder_get_state(decoder_) == FLAC__FILE_DECODER_END_OF_FILE) {
 280                                         file_info_.eof = true;
 281                                         break;
 282                                 }
 283                                 else if(!FLAC__file_decoder_process_single(decoder_)) {
 284                                         /*@@@ this should probably be a dialog */
 285                                         fprintf(stderr, "libxmms-flac: READ ERROR processing frame\n");
 286                                         file_info_.eof = true;
 287                                         break;
 288                                 }
 289                         }
 290                         if(wide_samples_in_reservoir_ > 0) {
 291                                 const unsigned channels = file_info_.channels;
 292                                 const unsigned bits_per_sample = file_info_.bits_per_sample;
 293 #ifdef FLAC__DO_DITHER
 294                                 const unsigned target_bps = min(bits_per_sample, 16);
 295 #else
 296                                 const unsigned target_bps = bits_per_sample;
 297 #endif
 298                                 const unsigned n = min(wide_samples_in_reservoir_, SAMPLES_PER_WRITE);
 299                                 const unsigned delta = n * channels;
 300                                 int bytes = (int)FLAC__plugin_common__pack_pcm_signed_little_endian(sample_buffer_, reservoir_, n, channels, bits_per_sample, target_bps);
 301                                 unsigned i;
 302
 303                                 for(i = delta; i < wide_samples_in_reservoir_ * channels; i++)
 304                                         reservoir_[i-delta] = reservoir_[i];
 305                                 wide_samples_in_reservoir_ -= n;
 306
 307                                 flac_ip.add_vis_pcm(flac_ip.output->written_time(), file_info_.sample_format, channels, bytes, sample_buffer_);
 308                                 while(flac_ip.output->buffer_free() < (int)bytes && file_info_.is_playing && file_info_.seek_to_in_sec == -1)
 309                                         xmms_usleep(10000);
 310                                 if(file_info_.is_playing && file_info_.seek_to_in_sec == -1)
 311                                         flac_ip.output->write_audio(sample_buffer_, bytes);
 312                         }
 313                         else {
 314                                 file_info_.eof = true;
 315                                 xmms_usleep(10000);
 316                         }
 317                 }
 318                 else
 319                         xmms_usleep(10000);
 320                 if(file_info_.seek_to_in_sec != -1) {
 321                         const double distance = (double)file_info_.seek_to_in_sec * 1000.0 / (double)file_info_.length_in_msec;
 322                         unsigned target_sample = (unsigned)(distance * (double)file_info_.total_samples);
 323                         if(FLAC__file_decoder_seek_absolute(decoder_, (FLAC__uint64)target_sample)) {
 324                                 flac_ip.output->flush(file_info_.seek_to_in_sec * 1000);
 325                                 file_info_.seek_to_in_sec = -1;
 326                                 file_info_.eof = false;
 327                                 wide_samples_in_reservoir_ = 0;
 328                         }
 329                 }
 330         }
 331
 332         safe_decoder_finish_(decoder_);
 333
 334         /* are these two calls necessary? */
 335         flac_ip.output->buffer_free();
 336         flac_ip.output->buffer_free();
 337
 338         pthread_exit(NULL);
 339         return 0; /* to silence the compiler warning about not returning a value */
 340 }
 341
 342 FLAC__bool safe_decoder_init_(const char *filename, FLAC__FileDecoder *decoder)
 343 {
 344         if(decoder == 0)
 345                 return false;
 346
 347         safe_decoder_finish_(decoder);
 348
 349         FLAC__file_decoder_set_md5_checking(decoder, false);
 350         FLAC__file_decoder_set_filename(decoder, filename);
 351         FLAC__file_decoder_set_write_callback(decoder, write_callback_);
 352         FLAC__file_decoder_set_metadata_callback(decoder, metadata_callback_);
 353         FLAC__file_decoder_set_error_callback(decoder, error_callback_);
 354         FLAC__file_decoder_set_client_data(decoder, &file_info_);
 355         if(FLAC__file_decoder_init(decoder) != FLAC__FILE_DECODER_OK)
 356                 return false;
 357
 358         if(!FLAC__file_decoder_process_until_end_of_metadata(decoder))
 359                 return false;
 360
 361         return true;
 362 }
 363
 364 void safe_decoder_finish_(FLAC__FileDecoder *decoder)
 365 {
 366         if(decoder && FLAC__file_decoder_get_state(decoder) != FLAC__FILE_DECODER_UNINITIALIZED)
 367                 FLAC__file_decoder_finish(decoder);
 368 }
 369
 370 void safe_decoder_delete_(FLAC__FileDecoder *decoder)
 371 {
 372         if(decoder) {
 373                 safe_decoder_finish_(decoder);
 374                 FLAC__file_decoder_delete(decoder);
 375         }
 376 }
 377
 378 FLAC__StreamDecoderWriteStatus write_callback_(const FLAC__FileDecoder *decoder, const FLAC__Frame *frame, const FLAC__int32 * const buffer[], void *client_data)
 379 {
 380         file_info_struct *file_info = (file_info_struct *)client_data;
 381         const unsigned channels = file_info->channels, wide_samples = frame->header.blocksize;
 382         unsigned wide_sample, offset_sample, channel;
 383
 384         (void)decoder;
 385
 386         if(file_info->abort_flag)
 387                 return FLAC__STREAM_DECODER_WRITE_STATUS_ABORT;
 388
 389         for(offset_sample = wide_samples_in_reservoir_ * channels, wide_sample = 0; wide_sample < wide_samples; wide_sample++)
 390                 for(channel = 0; channel < channels; channel++, offset_sample++)
 391                         reservoir_[offset_sample] = buffer[channel][wide_sample];
 392
 393         wide_samples_in_reservoir_ += wide_samples;
 394
 395         return FLAC__STREAM_DECODER_WRITE_STATUS_CONTINUE;
 396 }
 397
 398 void metadata_callback_(const FLAC__FileDecoder *decoder, const FLAC__StreamMetadata *metadata, void *client_data)
 399 {
 400         file_info_struct *file_info = (file_info_struct *)client_data;
 401         (void)decoder;
 402         if(metadata->type == FLAC__METADATA_TYPE_STREAMINFO) {
 403                 FLAC__ASSERT(metadata->data.stream_info.total_samples < 0x100000000); /* this plugin can only handle < 4 gigasamples */
 404                 file_info->total_samples = (unsigned)(metadata->data.stream_info.total_samples&0xffffffff);
 405                 file_info->bits_per_sample = metadata->data.stream_info.bits_per_sample;
 406                 file_info->channels = metadata->data.stream_info.channels;
 407                 file_info->sample_rate = metadata->data.stream_info.sample_rate;
 408
 409 #ifdef FLAC__DO_DITHER
 410                 if(file_info->bits_per_sample == 8) {
 411                         file_info->sample_format = FMT_S8;
 412                 }
 413                 else if(file_info->bits_per_sample == 16 || file_info->bits_per_sample == 24) {
 414                         file_info->sample_format = FMT_S16_LE;
 415                 }
 416                 else {
 417                         /*@@@ need some error here like wa2: MessageBox(mod_.hMainWindow, "ERROR: plugin can only handle 8/16/24-bit samples\n", "ERROR: plugin can only handle 8/16/24-bit samples", 0); */
 418                         file_info->abort_flag = true;
 419                         return;
 420                 }
 421 #else
 422                 if(file_info->bits_per_sample == 8) {
 423                         file_info->sample_format = FMT_S8;
 424                 }
 425                 else if(file_info->bits_per_sample == 16) {
 426                         file_info->sample_format = FMT_S16_LE;
 427                 }
 428                 else {
 429                         /*@@@ 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); */
 430                         file_info->abort_flag = true;
 431                         return;
 432                 }
 433 #endif
 434                 file_info->length_in_msec = file_info->total_samples * 10 / (file_info->sample_rate / 100);
 435         }
 436 }
 437
 438 void error_callback_(const FLAC__FileDecoder *decoder, FLAC__StreamDecoderErrorStatus status, void *client_data)
 439 {
 440         file_info_struct *file_info = (file_info_struct *)client_data;
 441         (void)decoder;
 442         if(status != FLAC__STREAM_DECODER_ERROR_STATUS_LOST_SYNC)
 443                 file_info->abort_flag = true;
 444 }