src/audio_output/input.c

   1 /*****************************************************************************
   2  * input.c : internal management of input streams for the audio output
   3  *****************************************************************************
   4  * Copyright (C) 2002-2007 the VideoLAN team
   5  * $Id$
   6  *
   7  * Authors: Christophe Massiot <massiot@via.ecp.fr>
   8  *
   9  * This program is free software; you can redistribute it and/or modify
  10  * it under the terms of the GNU General Public License as published by
  11  * the Free Software Foundation; either version 2 of the License, or
  12  * (at your option) any later version.
  13  *
  14  * This program is distributed in the hope that it will be useful,
  15  * but WITHOUT ANY WARRANTY; without even the implied warranty of
  16  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
  17  * GNU General Public License for more details.
  18  *
  19  * You should have received a copy of the GNU General Public License
  20  * along with this program; if not, write to the Free Software
  21  * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston MA 02110-1301, USA.
  22  *****************************************************************************/
  23
  24 /*****************************************************************************
  25  * Preamble
  26  *****************************************************************************/
  27
  28 #ifdef HAVE_CONFIG_H
  29 # include "config.h"
  30 #endif
  31
  32 #include <assert.h>
  33
  34 #include <vlc_common.h>
  35
  36 #include <stdio.h>
  37 #include <string.h>
  38 #include <math.h>
  39 #include <assert.h>
  40
  41 #include <vlc_input.h>
  42 #include <vlc_vout.h>                  /* for vout_Request */
  43
  44 #include <vlc_aout.h>
  45 #include <vlc_filter.h>
  46 #include <libvlc.h>
  47
  48 #include "aout_internal.h"
  49
  50 #define AOUT_ASSERT_MIXER_LOCKED vlc_assert_locked( &p_aout->mixer_lock )
  51 #define AOUT_ASSERT_INPUT_LOCKED vlc_assert_locked( &p_input->lock )
  52
  53 static void inputFailure( aout_instance_t *, aout_input_t *, const char * );
  54 static void inputDrop( aout_input_t *, aout_buffer_t * );
  55 static void inputResamplingStop( aout_input_t *p_input );
  56
  57 static int VisualizationCallback( vlc_object_t *, char const *,
  58                                   vlc_value_t, vlc_value_t, void * );
  59 static int EqualizerCallback( vlc_object_t *, char const *,
  60                               vlc_value_t, vlc_value_t, void * );
  61 static int ReplayGainCallback( vlc_object_t *, char const *,
  62                                vlc_value_t, vlc_value_t, void * );
  63 static void ReplayGainSelect( aout_instance_t *, aout_input_t * );
  64
  65 static vout_thread_t *RequestVout( void *,
  66                                    vout_thread_t *, video_format_t *, bool );
  67
  68 /*****************************************************************************
  69  * aout_InputNew : allocate a new input and rework the filter pipeline
  70  *****************************************************************************/
  71 int aout_InputNew( aout_instance_t * p_aout, aout_input_t * p_input, const aout_request_vout_t *p_request_vout )
  72 {
  73     audio_sample_format_t chain_input_format;
  74     audio_sample_format_t chain_output_format;
  75     vlc_value_t val, text;
  76     char *psz_filters, *psz_visual, *psz_scaletempo;
  77     int i_visual;
  78
  79     aout_FormatPrint( p_aout, "input", &p_input->input );
  80
  81     p_input->i_nb_resamplers = p_input->i_nb_filters = 0;
  82
  83     /* Prepare FIFO. */
  84     aout_FifoInit( p_aout, &p_input->mixer.fifo, p_aout->mixer_format.i_rate );
  85     p_input->mixer.begin = NULL;
  86
  87     /* */
  88     if( p_request_vout )
  89     {
  90         p_input->request_vout = *p_request_vout;
  91     }
  92     else
  93     {
  94         p_input->request_vout.pf_request_vout = RequestVout;
  95         p_input->request_vout.p_private = p_aout;
  96     }
  97
  98     /* Prepare format structure */
  99     chain_input_format  = p_input->input;
 100     chain_output_format = p_aout->mixer_format;
 101     chain_output_format.i_rate = p_input->input.i_rate;
 102     aout_FormatPrepare( &chain_output_format );
 103
 104     /* Now add user filters */
 105     if( var_Type( p_aout, "visual" ) == 0 )
 106     {
 107         var_Create( p_aout, "visual", VLC_VAR_STRING | VLC_VAR_HASCHOICE );
 108         text.psz_string = _("Visualizations");
 109         var_Change( p_aout, "visual", VLC_VAR_SETTEXT, &text, NULL );
 110         val.psz_string = (char*)""; text.psz_string = _("Disable");
 111         var_Change( p_aout, "visual", VLC_VAR_ADDCHOICE, &val, &text );
 112         val.psz_string = (char*)"spectrometer"; text.psz_string = _("Spectrometer");
 113         var_Change( p_aout, "visual", VLC_VAR_ADDCHOICE, &val, &text );
 114         val.psz_string = (char*)"scope"; text.psz_string = _("Scope");
 115         var_Change( p_aout, "visual", VLC_VAR_ADDCHOICE, &val, &text );
 116         val.psz_string = (char*)"spectrum"; text.psz_string = _("Spectrum");
 117         var_Change( p_aout, "visual", VLC_VAR_ADDCHOICE, &val, &text );
 118         val.psz_string = (char*)"vuMeter"; text.psz_string = _("Vu meter");
 119         var_Change( p_aout, "visual", VLC_VAR_ADDCHOICE, &val, &text );
 120
 121         /* Look for goom plugin */
 122         if( module_exists( "goom" ) )
 123         {
 124             val.psz_string = (char*)"goom"; text.psz_string = (char*)"Goom";
 125             var_Change( p_aout, "visual", VLC_VAR_ADDCHOICE, &val, &text );
 126         }
 127
 128         /* Look for libprojectM plugin */
 129         if( module_exists( "projectm" ) )
 130         {
 131             val.psz_string = (char*)"projectm"; text.psz_string = (char*)"projectM";
 132             var_Change( p_aout, "visual", VLC_VAR_ADDCHOICE, &val, &text );
 133         }
 134
 135         if( var_Get( p_aout, "effect-list", &val ) == VLC_SUCCESS )
 136         {
 137             var_SetString( p_aout, "visual", val.psz_string );
 138             free( val.psz_string );
 139         }
 140         var_AddCallback( p_aout, "visual", VisualizationCallback, NULL );
 141     }
 142
 143     if( var_Type( p_aout, "equalizer" ) == 0 )
 144     {
 145         module_config_t *p_config;
 146         int i;
 147
 148         p_config = config_FindConfig( VLC_OBJECT(p_aout), "equalizer-preset" );
 149         if( p_config && p_config->i_list )
 150         {
 151                var_Create( p_aout, "equalizer",
 152                            VLC_VAR_STRING | VLC_VAR_HASCHOICE );
 153             text.psz_string = _("Equalizer");
 154             var_Change( p_aout, "equalizer", VLC_VAR_SETTEXT, &text, NULL );
 155
 156             val.psz_string = (char*)""; text.psz_string = _("Disable");
 157             var_Change( p_aout, "equalizer", VLC_VAR_ADDCHOICE, &val, &text );
 158
 159             for( i = 0; i < p_config->i_list; i++ )
 160             {
 161                 val.psz_string = (char *)p_config->ppsz_list[i];
 162                 text.psz_string = (char *)p_config->ppsz_list_text[i];
 163                 var_Change( p_aout, "equalizer", VLC_VAR_ADDCHOICE,
 164                             &val, &text );
 165             }
 166
 167             var_AddCallback( p_aout, "equalizer", EqualizerCallback, NULL );
 168         }
 169     }
 170
 171     if( var_Type( p_aout, "audio-filter" ) == 0 )
 172     {
 173         var_Create( p_aout, "audio-filter",
 174                     VLC_VAR_STRING | VLC_VAR_DOINHERIT );
 175         text.psz_string = _("Audio filters");
 176         var_Change( p_aout, "audio-filter", VLC_VAR_SETTEXT, &text, NULL );
 177     }
 178     if( var_Type( p_aout, "audio-visual" ) == 0 )
 179     {
 180         var_Create( p_aout, "audio-visual",
 181                     VLC_VAR_STRING | VLC_VAR_DOINHERIT );
 182         text.psz_string = _("Audio visualizations");
 183         var_Change( p_aout, "audio-visual", VLC_VAR_SETTEXT, &text, NULL );
 184     }
 185
 186     if( var_Type( p_aout, "audio-replay-gain-mode" ) == 0 )
 187     {
 188         module_config_t *p_config;
 189         int i;
 190
 191         p_config = config_FindConfig( VLC_OBJECT(p_aout), "audio-replay-gain-mode" );
 192         if( p_config && p_config->i_list )
 193         {
 194             var_Create( p_aout, "audio-replay-gain-mode",
 195                         VLC_VAR_STRING | VLC_VAR_DOINHERIT );
 196
 197             text.psz_string = _("Replay gain");
 198             var_Change( p_aout, "audio-replay-gain-mode", VLC_VAR_SETTEXT, &text, NULL );
 199
 200             for( i = 0; i < p_config->i_list; i++ )
 201             {
 202                 val.psz_string = (char *)p_config->ppsz_list[i];
 203                 text.psz_string = (char *)p_config->ppsz_list_text[i];
 204                 var_Change( p_aout, "audio-replay-gain-mode", VLC_VAR_ADDCHOICE,
 205                             &val, &text );
 206             }
 207
 208             var_AddCallback( p_aout, "audio-replay-gain-mode", ReplayGainCallback, NULL );
 209         }
 210     }
 211     if( var_Type( p_aout, "audio-replay-gain-preamp" ) == 0 )
 212     {
 213         var_Create( p_aout, "audio-replay-gain-preamp",
 214                     VLC_VAR_FLOAT | VLC_VAR_DOINHERIT );
 215     }
 216     if( var_Type( p_aout, "audio-replay-gain-default" ) == 0 )
 217     {
 218         var_Create( p_aout, "audio-replay-gain-default",
 219                     VLC_VAR_FLOAT | VLC_VAR_DOINHERIT );
 220     }
 221     if( var_Type( p_aout, "audio-replay-gain-peak-protection" ) == 0 )
 222     {
 223         var_Create( p_aout, "audio-replay-gain-peak-protection",
 224                     VLC_VAR_BOOL | VLC_VAR_DOINHERIT );
 225     }
 226     if( var_Type( p_aout, "audio-time-stretch" ) == 0 )
 227     {
 228         var_Create( p_aout, "audio-time-stretch",
 229                     VLC_VAR_BOOL | VLC_VAR_DOINHERIT );
 230     }
 231
 232     psz_filters = var_GetString( p_aout, "audio-filter" );
 233     psz_visual = var_GetString( p_aout, "audio-visual");
 234     psz_scaletempo = var_GetBool( p_aout, "audio-time-stretch" ) ? strdup( "scaletempo" ) : NULL;
 235
 236     p_input->b_recycle_vout = psz_visual && *psz_visual;
 237
 238     /* parse user filter lists */
 239     char *const ppsz_array[] = { psz_scaletempo, psz_filters, psz_visual };
 240     p_input->p_playback_rate_filter = NULL;
 241
 242     for( i_visual = 0; i_visual < 3 && !AOUT_FMT_NON_LINEAR(&chain_output_format); i_visual++ )
 243     {
 244         char *psz_next = NULL;
 245         char *psz_parser = ppsz_array[i_visual];
 246
 247         if( psz_parser == NULL || !*psz_parser )
 248             continue;
 249
 250         while( psz_parser && *psz_parser )
 251         {
 252             filter_t * p_filter = NULL;
 253
 254             if( p_input->i_nb_filters >= AOUT_MAX_FILTERS )
 255             {
 256                 msg_Dbg( p_aout, "max filters reached (%d)", AOUT_MAX_FILTERS );
 257                 break;
 258             }
 259
 260             while( *psz_parser == ' ' && *psz_parser == ':' )
 261             {
 262                 psz_parser++;
 263             }
 264             if( ( psz_next = strchr( psz_parser , ':'  ) ) )
 265             {
 266                 *psz_next++ = '\0';
 267             }
 268             if( *psz_parser =='\0' )
 269             {
 270                 break;
 271             }
 272
 273             /* Create a VLC object */
 274             static const char typename[] = "audio filter";
 275             p_filter = vlc_custom_create( p_aout, sizeof(*p_filter),
 276                                           VLC_OBJECT_GENERIC, typename );
 277             if( p_filter == NULL )
 278             {
 279                 msg_Err( p_aout, "cannot add user filter %s (skipped)",
 280                          psz_parser );
 281                 psz_parser = psz_next;
 282                 continue;
 283             }
 284
 285             vlc_object_attach( p_filter , p_aout );
 286
 287             p_filter->p_owner = malloc( sizeof(*p_filter->p_owner) );
 288             p_filter->p_owner->p_aout  = p_aout;
 289             p_filter->p_owner->p_input = p_input;
 290
 291             /* request format */
 292             memcpy( &p_filter->fmt_in.audio, &chain_output_format,
 293                     sizeof(audio_sample_format_t) );
 294             p_filter->fmt_in.i_codec = chain_output_format.i_format;
 295             memcpy( &p_filter->fmt_out.audio, &chain_output_format,
 296                     sizeof(audio_sample_format_t) );
 297             p_filter->fmt_out.i_codec = chain_output_format.i_format;
 298             p_filter->pf_audio_buffer_new = aout_FilterBufferNew;
 299
 300             /* try to find the requested filter */
 301             if( i_visual == 2 ) /* this can only be a visualization module */
 302             {
 303                 p_filter->p_module = module_need( p_filter, "visualization2",
 304                                                   psz_parser, true );
 305             }
 306             else /* this can be a audio filter module as well as a visualization module */
 307             {
 308                 p_filter->p_module = module_need( p_filter, "audio filter",
 309                                               psz_parser, true );
 310
 311                 if ( p_filter->p_module == NULL )
 312                 {
 313                     /* if the filter requested a special format, retry */
 314                     if ( !( AOUT_FMTS_IDENTICAL( &p_filter->fmt_in.audio,
 315                                                  &chain_input_format )
 316                             && AOUT_FMTS_IDENTICAL( &p_filter->fmt_out.audio,
 317                                                     &chain_output_format ) ) )
 318                     {
 319                         aout_FormatPrepare( &p_filter->fmt_in.audio );
 320                         aout_FormatPrepare( &p_filter->fmt_out.audio );
 321                         p_filter->p_module = module_need( p_filter,
 322                                                           "audio filter",
 323                                                           psz_parser, true );
 324                     }
 325                     /* try visual filters */
 326                     else
 327                     {
 328                         memcpy( &p_filter->fmt_in.audio, &chain_output_format,
 329                                 sizeof(audio_sample_format_t) );
 330                         memcpy( &p_filter->fmt_out.audio, &chain_output_format,
 331                                 sizeof(audio_sample_format_t) );
 332                         p_filter->p_module = module_need( p_filter,
 333                                                           "visualization2",
 334                                                           psz_parser, true );
 335                     }
 336                 }
 337             }
 338
 339             /* failure */
 340             if ( p_filter->p_module == NULL )
 341             {
 342                 msg_Err( p_aout, "cannot add user filter %s (skipped)",
 343                          psz_parser );
 344
 345                 free( p_filter->p_owner );
 346                 vlc_object_detach( p_filter );
 347                 vlc_object_release( p_filter );
 348
 349                 psz_parser = psz_next;
 350                 continue;
 351             }
 352
 353             /* complete the filter chain if necessary */
 354             if ( !AOUT_FMTS_IDENTICAL( &chain_input_format,
 355                                        &p_filter->fmt_in.audio ) )
 356             {
 357                 if ( aout_FiltersCreatePipeline( p_aout, p_input->pp_filters,
 358                                                  &p_input->i_nb_filters,
 359                                                  &chain_input_format,
 360                                                  &p_filter->fmt_in.audio ) < 0 )
 361                 {
 362                     msg_Err( p_aout, "cannot add user filter %s (skipped)",
 363                              psz_parser );
 364
 365                     module_unneed( p_filter, p_filter->p_module );
 366                     free( p_filter->p_owner );
 367                     vlc_object_detach( p_filter );
 368                     vlc_object_release( p_filter );
 369
 370                     psz_parser = psz_next;
 371                     continue;
 372                 }
 373             }
 374
 375             /* success */
 376             p_input->pp_filters[p_input->i_nb_filters++] = p_filter;
 377             memcpy( &chain_input_format, &p_filter->fmt_out.audio,
 378                     sizeof( audio_sample_format_t ) );
 379
 380             if( i_visual == 0 ) /* scaletempo */
 381                 p_input->p_playback_rate_filter = p_filter;
 382
 383             /* next filter if any */
 384             psz_parser = psz_next;
 385         }
 386     }
 387     free( psz_visual );
 388     free( psz_filters );
 389     free( psz_scaletempo );
 390
 391     /* complete the filter chain if necessary */
 392     if ( !AOUT_FMTS_IDENTICAL( &chain_input_format, &chain_output_format ) )
 393     {
 394         if ( aout_FiltersCreatePipeline( p_aout, p_input->pp_filters,
 395                                          &p_input->i_nb_filters,
 396                                          &chain_input_format,
 397                                          &chain_output_format ) < 0 )
 398         {
 399             inputFailure( p_aout, p_input, "couldn't set an input pipeline" );
 400             return -1;
 401         }
 402     }
 403
 404     /* Prepare hints for the buffer allocator. */
 405     p_input->input_alloc.b_alloc = true;
 406     p_input->input_alloc.i_bytes_per_sec = -1;
 407
 408     /* Create resamplers. */
 409     if ( !AOUT_FMT_NON_LINEAR( &p_aout->mixer_format ) )
 410     {
 411         chain_output_format.i_rate = (__MAX(p_input->input.i_rate,
 412                                             p_aout->mixer_format.i_rate)
 413                                  * (100 + AOUT_MAX_RESAMPLING)) / 100;
 414         if ( chain_output_format.i_rate == p_aout->mixer_format.i_rate )
 415         {
 416             /* Just in case... */
 417             chain_output_format.i_rate++;
 418         }
 419         if ( aout_FiltersCreatePipeline( p_aout, p_input->pp_resamplers,
 420                                          &p_input->i_nb_resamplers,
 421                                          &chain_output_format,
 422                                          &p_aout->mixer_format ) < 0 )
 423         {
 424             inputFailure( p_aout, p_input, "couldn't set a resampler pipeline");
 425             return -1;
 426         }
 427
 428         aout_FiltersHintBuffers( p_aout, p_input->pp_resamplers,
 429                                  p_input->i_nb_resamplers,
 430                                  &p_input->input_alloc );
 431         p_input->input_alloc.b_alloc = true;
 432
 433         /* Setup the initial rate of the resampler */
 434         p_input->pp_resamplers[0]->fmt_in.audio.i_rate = p_input->input.i_rate;
 435     }
 436     p_input->i_resampling_type = AOUT_RESAMPLING_NONE;
 437
 438     if( ! p_input->p_playback_rate_filter && p_input->i_nb_resamplers > 0 )
 439     {
 440         p_input->p_playback_rate_filter = p_input->pp_resamplers[0];
 441     }
 442
 443     aout_FiltersHintBuffers( p_aout, p_input->pp_filters,
 444                              p_input->i_nb_filters,
 445                              &p_input->input_alloc );
 446     p_input->input_alloc.b_alloc = true;
 447
 448     /* i_bytes_per_sec is still == -1 if no filters */
 449     p_input->input_alloc.i_bytes_per_sec = __MAX(
 450                                     p_input->input_alloc.i_bytes_per_sec,
 451                                     (int)(p_input->input.i_bytes_per_frame
 452                                      * p_input->input.i_rate
 453                                      / p_input->input.i_frame_length) );
 454
 455     ReplayGainSelect( p_aout, p_input );
 456
 457     /* Success */
 458     p_input->b_error = false;
 459     p_input->b_restart = false;
 460     p_input->i_last_input_rate = INPUT_RATE_DEFAULT;
 461
 462     return 0;
 463 }
 464
 465 /*****************************************************************************
 466  * aout_InputDelete : delete an input
 467  *****************************************************************************
 468  * This function must be entered with the mixer lock.
 469  *****************************************************************************/
 470 int aout_InputDelete( aout_instance_t * p_aout, aout_input_t * p_input )
 471 {
 472     AOUT_ASSERT_MIXER_LOCKED;
 473     if ( p_input->b_error )
 474         return 0;
 475
 476     /* XXX We need to update b_recycle_vout before calling aout_FiltersDestroyPipeline.
 477      * FIXME They can be a race condition if audio-visual is updated between
 478      * aout_InputDelete and aout_InputNew.
 479      */
 480     char *psz_visual = var_GetString( p_aout, "audio-visual");
 481     p_input->b_recycle_vout = psz_visual && *psz_visual;
 482     free( psz_visual );
 483
 484     aout_FiltersDestroyPipeline( p_aout, p_input->pp_filters,
 485                                  p_input->i_nb_filters );
 486     p_input->i_nb_filters = 0;
 487     aout_FiltersDestroyPipeline( p_aout, p_input->pp_resamplers,
 488                                  p_input->i_nb_resamplers );
 489     p_input->i_nb_resamplers = 0;
 490     aout_FifoDestroy( p_aout, &p_input->mixer.fifo );
 491
 492     return 0;
 493 }
 494
 495 /*****************************************************************************
 496  * aout_InputPlay : play a buffer
 497  *****************************************************************************
 498  * This function must be entered with the input lock.
 499  *****************************************************************************/
 500 /* XXX Do not activate it !! */
 501 //#define AOUT_PROCESS_BEFORE_CHEKS
 502 int aout_InputPlay( aout_instance_t * p_aout, aout_input_t * p_input,
 503                     aout_buffer_t * p_buffer, int i_input_rate )
 504 {
 505     mtime_t start_date;
 506     AOUT_ASSERT_INPUT_LOCKED;
 507
 508     if( p_input->b_restart )
 509     {
 510         aout_fifo_t fifo;
 511         uint8_t     *p_first_byte_to_mix;
 512         bool        b_paused;
 513         mtime_t     i_pause_date;
 514
 515         aout_lock_mixer( p_aout );
 516         aout_lock_input_fifos( p_aout );
 517
 518         /* A little trick to avoid loosing our input fifo and properties */
 519
 520         p_first_byte_to_mix = p_input->mixer.begin;
 521         fifo = p_input->mixer.fifo;
 522         b_paused = p_input->b_paused;
 523         i_pause_date = p_input->i_pause_date;
 524
 525         aout_FifoInit( p_aout, &p_input->mixer.fifo, p_aout->mixer_format.i_rate );
 526
 527         aout_InputDelete( p_aout, p_input );
 528
 529         aout_InputNew( p_aout, p_input, &p_input->request_vout );
 530         p_input->mixer.begin = p_first_byte_to_mix;
 531         p_input->mixer.fifo = fifo;
 532         p_input->b_paused = b_paused;
 533         p_input->i_pause_date = i_pause_date;
 534
 535         aout_unlock_input_fifos( p_aout );
 536         aout_unlock_mixer( p_aout );
 537     }
 538
 539     if( i_input_rate != INPUT_RATE_DEFAULT && p_input->p_playback_rate_filter == NULL )
 540     {
 541         inputDrop( p_input, p_buffer );
 542         return 0;
 543     }
 544
 545 #ifdef AOUT_PROCESS_BEFORE_CHEKS
 546     /* Run pre-filters. */
 547     aout_FiltersPlay( p_aout, p_input->pp_filters, p_input->i_nb_filters,
 548                       &p_buffer );
 549     if( !p_buffer )
 550         return 0;
 551
 552     /* Actually run the resampler now. */
 553     if ( p_input->i_nb_resamplers > 0 )
 554     {
 555         const mtime_t i_date = p_buffer->i_pts;
 556         aout_FiltersPlay( p_aout, p_input->pp_resamplers,
 557                           p_input->i_nb_resamplers,
 558                           &p_buffer );
 559     }
 560
 561     if( !p_buffer )
 562         return 0;
 563     if( p_buffer->i_nb_samples <= 0 )
 564     {
 565         block_Release( p_buffer );
 566         return 0;
 567     }
 568 #endif
 569
 570     /* Handle input rate change, but keep drift correction */
 571     if( i_input_rate != p_input->i_last_input_rate )
 572     {
 573         unsigned int * const pi_rate = &p_input->p_playback_rate_filter->fmt_in.audio.i_rate;
 574 #define F(r,ir) ( INPUT_RATE_DEFAULT * (r) / (ir) )
 575         const int i_delta = *pi_rate - F(p_input->input.i_rate,p_input->i_last_input_rate);
 576         *pi_rate = F(p_input->input.i_rate + i_delta, i_input_rate);
 577 #undef F
 578         p_input->i_last_input_rate = i_input_rate;
 579     }
 580
 581     /* We don't care if someone changes the start date behind our back after
 582      * this. We'll deal with that when pushing the buffer, and compensate
 583      * with the next incoming buffer. */
 584     aout_lock_input_fifos( p_aout );
 585     start_date = aout_FifoNextStart( p_aout, &p_input->mixer.fifo );
 586     aout_unlock_input_fifos( p_aout );
 587
 588     if ( start_date != 0 && start_date < mdate() )
 589     {
 590         /* The decoder is _very_ late. This can only happen if the user
 591          * pauses the stream (or if the decoder is buggy, which cannot
 592          * happen :). */
 593         msg_Warn( p_aout, "computed PTS is out of range (%"PRId64"), "
 594                   "clearing out", mdate() - start_date );
 595         aout_lock_input_fifos( p_aout );
 596         aout_FifoSet( p_aout, &p_input->mixer.fifo, 0 );
 597         p_input->mixer.begin = NULL;
 598         aout_unlock_input_fifos( p_aout );
 599         if ( p_input->i_resampling_type != AOUT_RESAMPLING_NONE )
 600             msg_Warn( p_aout, "timing screwed, stopping resampling" );
 601         inputResamplingStop( p_input );
 602         p_buffer->i_flags |= BLOCK_FLAG_DISCONTINUITY;
 603         start_date = 0;
 604     }
 605
 606     if ( p_buffer->i_pts < mdate() + AOUT_MIN_PREPARE_TIME )
 607     {
 608         /* The decoder gives us f*cked up PTS. It's its business, but we
 609          * can't present it anyway, so drop the buffer. */
 610         msg_Warn( p_aout, "PTS is out of range (%"PRId64"), dropping buffer",
 611                   mdate() - p_buffer->i_pts );
 612
 613         inputDrop( p_input, p_buffer );
 614         inputResamplingStop( p_input );
 615         return 0;
 616     }
 617
 618     /* If the audio drift is too big then it's not worth trying to resample
 619      * the audio. */
 620     mtime_t i_pts_tolerance = 3 * AOUT_PTS_TOLERANCE * i_input_rate / INPUT_RATE_DEFAULT;
 621     if ( start_date != 0 &&
 622          ( start_date < p_buffer->i_pts - i_pts_tolerance ) )
 623     {
 624         msg_Warn( p_aout, "audio drift is too big (%"PRId64"), clearing out",
 625                   start_date - p_buffer->i_pts );
 626         aout_lock_input_fifos( p_aout );
 627         aout_FifoSet( p_aout, &p_input->mixer.fifo, 0 );
 628         p_input->mixer.begin = NULL;
 629         aout_unlock_input_fifos( p_aout );
 630         if ( p_input->i_resampling_type != AOUT_RESAMPLING_NONE )
 631             msg_Warn( p_aout, "timing screwed, stopping resampling" );
 632         inputResamplingStop( p_input );
 633         p_buffer->i_flags |= BLOCK_FLAG_DISCONTINUITY;
 634         start_date = 0;
 635     }
 636     else if ( start_date != 0 &&
 637               ( start_date > p_buffer->i_pts + i_pts_tolerance) )
 638     {
 639         msg_Warn( p_aout, "audio drift is too big (%"PRId64"), dropping buffer",
 640                   start_date - p_buffer->i_pts );
 641         inputDrop( p_input, p_buffer );
 642         return 0;
 643     }
 644
 645     if ( start_date == 0 ) start_date = p_buffer->i_pts;
 646
 647 #ifndef AOUT_PROCESS_BEFORE_CHEKS
 648     /* Run pre-filters. */
 649     aout_FiltersPlay( p_input->pp_filters, p_input->i_nb_filters, &p_buffer );
 650     if( !p_buffer )
 651         return 0;
 652 #endif
 653
 654     /* Run the resampler if needed.
 655      * We first need to calculate the output rate of this resampler. */
 656     if ( ( p_input->i_resampling_type == AOUT_RESAMPLING_NONE ) &&
 657          ( start_date < p_buffer->i_pts - AOUT_PTS_TOLERANCE
 658            || start_date > p_buffer->i_pts + AOUT_PTS_TOLERANCE ) &&
 659          p_input->i_nb_resamplers > 0 )
 660     {
 661         /* Can happen in several circumstances :
 662          * 1. A problem at the input (clock drift)
 663          * 2. A small pause triggered by the user
 664          * 3. Some delay in the output stage, causing a loss of lip
 665          *    synchronization
 666          * Solution : resample the buffer to avoid a scratch.
 667          */
 668         mtime_t drift = p_buffer->i_pts - start_date;
 669
 670         p_input->i_resamp_start_date = mdate();
 671         p_input->i_resamp_start_drift = (int)drift;
 672
 673         if ( drift > 0 )
 674             p_input->i_resampling_type = AOUT_RESAMPLING_DOWN;
 675         else
 676             p_input->i_resampling_type = AOUT_RESAMPLING_UP;
 677
 678         msg_Warn( p_aout, "buffer is %"PRId64" %s, triggering %ssampling",
 679                           drift > 0 ? drift : -drift,
 680                           drift > 0 ? "in advance" : "late",
 681                           drift > 0 ? "down" : "up");
 682     }
 683
 684     if ( p_input->i_resampling_type != AOUT_RESAMPLING_NONE )
 685     {
 686         /* Resampling has been triggered previously (because of dates
 687          * mismatch). We want the resampling to happen progressively so
 688          * it isn't too audible to the listener. */
 689
 690         if( p_input->i_resampling_type == AOUT_RESAMPLING_UP )
 691         {
 692             p_input->pp_resamplers[0]->fmt_in.audio.i_rate += 2; /* Hz */
 693         }
 694         else
 695         {
 696             p_input->pp_resamplers[0]->fmt_in.audio.i_rate -= 2; /* Hz */
 697         }
 698
 699         /* Check if everything is back to normal, in which case we can stop the
 700          * resampling */
 701         unsigned int i_nominal_rate =
 702           (p_input->pp_resamplers[0] == p_input->p_playback_rate_filter)
 703           ? INPUT_RATE_DEFAULT * p_input->input.i_rate / i_input_rate
 704           : p_input->input.i_rate;
 705         if( p_input->pp_resamplers[0]->fmt_in.audio.i_rate == i_nominal_rate )
 706         {
 707             p_input->i_resampling_type = AOUT_RESAMPLING_NONE;
 708             msg_Warn( p_aout, "resampling stopped after %"PRIi64" usec "
 709                       "(drift: %"PRIi64")",
 710                       mdate() - p_input->i_resamp_start_date,
 711                       p_buffer->i_pts - start_date);
 712         }
 713         else if( abs( (int)(p_buffer->i_pts - start_date) ) <
 714                  abs( p_input->i_resamp_start_drift ) / 2 )
 715         {
 716             /* if we reduced the drift from half, then it is time to switch
 717              * back the resampling direction. */
 718             if( p_input->i_resampling_type == AOUT_RESAMPLING_UP )
 719                 p_input->i_resampling_type = AOUT_RESAMPLING_DOWN;
 720             else
 721                 p_input->i_resampling_type = AOUT_RESAMPLING_UP;
 722             p_input->i_resamp_start_drift = 0;
 723         }
 724         else if( p_input->i_resamp_start_drift &&
 725                  ( abs( (int)(p_buffer->i_pts - start_date) ) >
 726                    abs( p_input->i_resamp_start_drift ) * 3 / 2 ) )
 727         {
 728             /* If the drift is increasing and not decreasing, than something
 729              * is bad. We'd better stop the resampling right now. */
 730             msg_Warn( p_aout, "timing screwed, stopping resampling" );
 731             inputResamplingStop( p_input );
 732             p_buffer->i_flags |= BLOCK_FLAG_DISCONTINUITY;
 733         }
 734     }
 735
 736 #ifndef AOUT_PROCESS_BEFORE_CHEKS
 737     /* Actually run the resampler now. */
 738     if ( p_input->i_nb_resamplers > 0 )
 739     {
 740         aout_FiltersPlay( p_input->pp_resamplers, p_input->i_nb_resamplers,
 741                           &p_buffer );
 742     }
 743
 744     if( !p_buffer )
 745         return 0;
 746     if( p_buffer->i_nb_samples <= 0 )
 747     {
 748         block_Release( p_buffer );
 749         return 0;
 750     }
 751 #endif
 752
 753     /* Adding the start date will be managed by aout_FifoPush(). */
 754     p_buffer->i_pts = start_date;
 755
 756     aout_lock_input_fifos( p_aout );
 757     aout_FifoPush( p_aout, &p_input->mixer.fifo, p_buffer );
 758     aout_unlock_input_fifos( p_aout );
 759     return 0;
 760 }
 761
 762 /*****************************************************************************
 763  * static functions
 764  *****************************************************************************/
 765
 766 static void inputFailure( aout_instance_t * p_aout, aout_input_t * p_input,
 767                           const char * psz_error_message )
 768 {
 769     /* error message */
 770     msg_Err( p_aout, "%s", psz_error_message );
 771
 772     /* clean up */
 773     aout_FiltersDestroyPipeline( p_aout, p_input->pp_filters,
 774                                  p_input->i_nb_filters );
 775     aout_FiltersDestroyPipeline( p_aout, p_input->pp_resamplers,
 776                                  p_input->i_nb_resamplers );
 777     aout_FifoDestroy( p_aout, &p_input->mixer.fifo );
 778     var_Destroy( p_aout, "visual" );
 779     var_Destroy( p_aout, "equalizer" );
 780     var_Destroy( p_aout, "audio-filter" );
 781     var_Destroy( p_aout, "audio-visual" );
 782
 783     var_Destroy( p_aout, "audio-replay-gain-mode" );
 784     var_Destroy( p_aout, "audio-replay-gain-default" );
 785     var_Destroy( p_aout, "audio-replay-gain-preamp" );
 786     var_Destroy( p_aout, "audio-replay-gain-peak-protection" );
 787
 788     /* error flag */
 789     p_input->b_error = 1;
 790 }
 791
 792 static void inputDrop( aout_input_t *p_input, aout_buffer_t *p_buffer )
 793 {
 794     aout_BufferFree( p_buffer );
 795
 796     p_input->i_buffer_lost++;
 797 }
 798
 799 static void inputResamplingStop( aout_input_t *p_input )
 800 {
 801     p_input->i_resampling_type = AOUT_RESAMPLING_NONE;
 802     if( p_input->i_nb_resamplers != 0 )
 803     {
 804         p_input->pp_resamplers[0]->fmt_in.audio.i_rate =
 805             ( p_input->pp_resamplers[0] == p_input->p_playback_rate_filter )
 806             ? INPUT_RATE_DEFAULT * p_input->input.i_rate / p_input->i_last_input_rate
 807             : p_input->input.i_rate;
 808     }
 809 }
 810
 811 static vout_thread_t *RequestVout( void *p_private,
 812                                    vout_thread_t *p_vout, video_format_t *p_fmt, bool b_recycle )
 813 {
 814     aout_instance_t *p_aout = p_private;
 815     VLC_UNUSED(b_recycle);
 816     return vout_Request( p_aout, p_vout, p_fmt );
 817 }
 818
 819 vout_thread_t *aout_filter_RequestVout( filter_t *p_filter,
 820                                         vout_thread_t *p_vout, video_format_t *p_fmt )
 821 {
 822     aout_input_t *p_input = p_filter->p_owner->p_input;
 823     aout_request_vout_t *p_request = &p_input->request_vout;
 824
 825     /* XXX: this only works from audio input */
 826     /* If you want to use visualization filters from another place, you will
 827      * need to add a new pf_aout_request_vout callback or store a pointer
 828      * to aout_request_vout_t inside filter_t (i.e. a level of indirection). */
 829
 830     return p_request->pf_request_vout( p_request->p_private,
 831                                        p_vout, p_fmt, p_input->b_recycle_vout );
 832 }
 833
 834 static int ChangeFiltersString( aout_instance_t * p_aout, const char* psz_variable,
 835                                  const char *psz_name, bool b_add )
 836 {
 837     return AoutChangeFilterString( VLC_OBJECT(p_aout), p_aout,
 838                                    psz_variable, psz_name, b_add ) ? 1 : 0;
 839 }
 840
 841 static int VisualizationCallback( vlc_object_t *p_this, char const *psz_cmd,
 842                        vlc_value_t oldval, vlc_value_t newval, void *p_data )
 843 {
 844     aout_instance_t *p_aout = (aout_instance_t *)p_this;
 845     char *psz_mode = newval.psz_string;
 846     (void)psz_cmd; (void)oldval; (void)p_data;
 847
 848     if( !psz_mode || !*psz_mode )
 849     {
 850         ChangeFiltersString( p_aout, "audio-visual", "goom", false );
 851         ChangeFiltersString( p_aout, "audio-visual", "visual", false );
 852         ChangeFiltersString( p_aout, "audio-visual", "projectm", false );
 853     }
 854     else
 855     {
 856         if( !strcmp( "goom", psz_mode ) )
 857         {
 858             ChangeFiltersString( p_aout, "audio-visual", "visual", false );
 859             ChangeFiltersString( p_aout, "audio-visual", "goom", true );
 860             ChangeFiltersString( p_aout, "audio-visual", "projectm", false );
 861         }
 862         else if( !strcmp( "projectm", psz_mode ) )
 863         {
 864             ChangeFiltersString( p_aout, "audio-visual", "visual", false );
 865             ChangeFiltersString( p_aout, "audio-visual", "goom", false );
 866             ChangeFiltersString( p_aout, "audio-visual", "projectm", true );
 867         }
 868         else
 869         {
 870             var_Create( p_aout, "effect-list", VLC_VAR_STRING );
 871             var_SetString( p_aout, "effect-list", psz_mode );
 872
 873             ChangeFiltersString( p_aout, "audio-visual", "goom", false );
 874             ChangeFiltersString( p_aout, "audio-visual", "visual", true );
 875             ChangeFiltersString( p_aout, "audio-visual", "projectm", false );
 876         }
 877     }
 878
 879     /* That sucks */
 880     AoutInputsMarkToRestart( p_aout );
 881
 882     return VLC_SUCCESS;
 883 }
 884
 885 static int EqualizerCallback( vlc_object_t *p_this, char const *psz_cmd,
 886                        vlc_value_t oldval, vlc_value_t newval, void *p_data )
 887 {
 888     aout_instance_t *p_aout = (aout_instance_t *)p_this;
 889     char *psz_mode = newval.psz_string;
 890     int i_ret;
 891     (void)psz_cmd; (void)oldval; (void)p_data;
 892
 893     if( !psz_mode || !*psz_mode )
 894     {
 895         i_ret = ChangeFiltersString( p_aout, "audio-filter", "equalizer",
 896                                      false );
 897     }
 898     else
 899     {
 900         var_Create( p_aout, "equalizer-preset", VLC_VAR_STRING );
 901         var_SetString( p_aout, "equalizer-preset", psz_mode );
 902         i_ret = ChangeFiltersString( p_aout, "audio-filter", "equalizer",
 903                                      true );
 904     }
 905
 906     /* That sucks */
 907     if( i_ret == 1 )
 908         AoutInputsMarkToRestart( p_aout );
 909     return VLC_SUCCESS;
 910 }
 911
 912 static int ReplayGainCallback( vlc_object_t *p_this, char const *psz_cmd,
 913                                vlc_value_t oldval, vlc_value_t newval, void *p_data )
 914 {
 915     VLC_UNUSED(psz_cmd); VLC_UNUSED(oldval);
 916     VLC_UNUSED(newval); VLC_UNUSED(p_data);
 917     aout_instance_t *p_aout = (aout_instance_t *)p_this;
 918     int i;
 919
 920     aout_lock_mixer( p_aout );
 921     for( i = 0; i < p_aout->i_nb_inputs; i++ )
 922         ReplayGainSelect( p_aout, p_aout->pp_inputs[i] );
 923
 924     /* Restart the mixer (a trivial mixer may be in use) */
 925     if( p_aout->p_mixer )
 926         aout_MixerMultiplierSet( p_aout, p_aout->mixer_multiplier );
 927     aout_unlock_mixer( p_aout );
 928
 929     return VLC_SUCCESS;
 930 }
 931
 932 static void ReplayGainSelect( aout_instance_t *p_aout, aout_input_t *p_input )
 933 {
 934     char *psz_replay_gain = var_GetNonEmptyString( p_aout,
 935                                                    "audio-replay-gain-mode" );
 936     int i_mode;
 937     int i_use;
 938     float f_gain;
 939
 940     p_input->mixer.multiplier = 1.0;
 941
 942     if( !psz_replay_gain )
 943         return;
 944
 945     /* Find select mode */
 946     if( !strcmp( psz_replay_gain, "track" ) )
 947         i_mode = AUDIO_REPLAY_GAIN_TRACK;
 948     else if( !strcmp( psz_replay_gain, "album" ) )
 949         i_mode = AUDIO_REPLAY_GAIN_ALBUM;
 950     else
 951         i_mode = AUDIO_REPLAY_GAIN_MAX;
 952
 953     /* If the select mode is not available, prefer the other one */
 954     i_use = i_mode;
 955     if( i_use != AUDIO_REPLAY_GAIN_MAX && !p_input->replay_gain.pb_gain[i_use] )
 956     {
 957         for( i_use = 0; i_use < AUDIO_REPLAY_GAIN_MAX; i_use++ )
 958         {
 959             if( p_input->replay_gain.pb_gain[i_use] )
 960                 break;
 961         }
 962     }
 963
 964     /* */
 965     if( i_use != AUDIO_REPLAY_GAIN_MAX )
 966         f_gain = p_input->replay_gain.pf_gain[i_use] + var_GetFloat( p_aout, "audio-replay-gain-preamp" );
 967     else if( i_mode != AUDIO_REPLAY_GAIN_MAX )
 968         f_gain = var_GetFloat( p_aout, "audio-replay-gain-default" );
 969     else
 970         f_gain = 0.0;
 971     p_input->mixer.multiplier = pow( 10.0, f_gain / 20.0 );
 972
 973     /* */
 974     if( p_input->replay_gain.pb_peak[i_use] &&
 975         var_GetBool( p_aout, "audio-replay-gain-peak-protection" ) &&
 976         p_input->replay_gain.pf_peak[i_use] * p_input->mixer.multiplier > 1.0 )
 977     {
 978         p_input->mixer.multiplier = 1.0f / p_input->replay_gain.pf_peak[i_use];
 979     }
 980
 981     free( psz_replay_gain );
 982 }
 983