git.sesse.net Git - vlc/blob - src/audio_decoder/audio_decoder.c

   1 /******************************************************************************
   2  * audio_decoder.c: MPEG1 Layer I-II audio decoder thread
   3  * (c)1999 VideoLAN
   4  ******************************************************************************/
   5
   6 /*
   7  * TODO :
   8  *
   9  * - optimiser les NeedBits() et les GetBits() du code là où c'est possible ;
  10  * - vlc_cond_signal() / vlc_cond_wait() ;
  11  *
  12  */
  13
  14 /******************************************************************************
  15  * Preamble
  16  ******************************************************************************/
  17 #include <unistd.h>
  18
  19 #include <stdio.h>                                            /* "intf_msg.h" */
  20 #include <stdlib.h>                                       /* malloc(), free() */
  21 #include <sys/types.h>
  22 #include <sys/socket.h>
  23 #include <netinet/in.h>                                            /* ntohl() */
  24 #include <sys/soundcard.h>                                /* "audio_output.h" */
  25 #include <sys/uio.h>                                             /* "input.h" */
  26
  27 #include "common.h"
  28 #include "config.h"
  29 #include "mtime.h"
  30 #include "vlc_thread.h"
  31 #include "debug.h"                                       /* "input_netlist.h" */
  32
  33 #include "intf_msg.h"                         /* intf_DbgMsg(), intf_ErrMsg() */
  34
  35 #include "input.h"                                            /* pes_packet_t */
  36 #include "input_netlist.h"                          /* input_NetlistFreePES() */
  37 #include "decoder_fifo.h"          /* DECODER_FIFO_(ISEMPTY|START|INCSTART)() */
  38
  39 #include "audio_output.h"
  40
  41 #include "audio_constants.h"
  42 #include "audio_decoder.h"
  43 #include "audio_math.h"
  44
  45 /******************************************************************************
  46  * Local prototypes
  47  ******************************************************************************/
  48 static int      InitThread              ( adec_thread_t * p_adec );
  49 static void     RunThread               ( adec_thread_t * p_adec );
  50 static void     ErrorThread             ( adec_thread_t * p_adec );
  51 static void     EndThread               ( adec_thread_t * p_adec );
  52
  53 /*
  54 static int      adec_Layer1_Mono        ( adec_thread_t * p_adec );
  55 static int      adec_Layer1_Stereo      ( adec_thread_t * p_adec );
  56 static int      adec_Layer2_Mono        ( adec_thread_t * p_adec );
  57 static int      adec_Layer2_Stereo      ( adec_thread_t * p_adec );
  58
  59 static byte_t   GetByte                 ( bit_stream_t * p_bit_stream );
  60 static void     NeedBits                ( bit_stream_t * p_bit_stream, int i_bits );
  61 static void     DumpBits                ( bit_stream_t * p_bit_stream, int i_bits );
  62 static int      FindHeader              ( adec_thread_t * p_adec );
  63 */
  64
  65 /******************************************************************************
  66  * adec_CreateThread: creates an audio decoder thread
  67  ******************************************************************************
  68  * This function creates a new audio decoder thread, and returns a pointer to
  69  * its description. On error, it returns NULL.
  70  ******************************************************************************/
  71 adec_thread_t * adec_CreateThread( input_thread_t * p_input )
  72 {
  73     adec_thread_t *     p_adec;
  74
  75     intf_DbgMsg("adec debug: creating audio decoder thread\n");
  76
  77     /* Allocate the memory needed to store the thread's structure */
  78     if ( (p_adec = (adec_thread_t *)malloc( sizeof(adec_thread_t) )) == NULL )
  79     {
  80         intf_ErrMsg("adec error: not enough memory for adec_CreateThread() to create the new thread\n");
  81         return( NULL );
  82     }
  83
  84     /*
  85      * Initialize the thread properties
  86      */
  87     p_adec->b_die = 0;
  88     p_adec->b_error = 0;
  89
  90     /*
  91      * Initialize the input properties
  92      */
  93     /* Initialize the decoder fifo's data lock and conditional variable and set
  94      * its buffer as empty */
  95     vlc_mutex_init( &p_adec->fifo.data_lock );
  96     vlc_cond_init( &p_adec->fifo.data_wait );
  97     p_adec->fifo.i_start = 0;
  98     p_adec->fifo.i_end = 0;
  99     /* Initialize the bit stream structure */
 100     p_adec->bit_stream.p_input = p_input;
 101     p_adec->bit_stream.p_decoder_fifo = &p_adec->fifo;
 102     p_adec->bit_stream.fifo.buffer = 0;
 103     p_adec->bit_stream.fifo.i_available = 0;
 104
 105     /*
 106      * Initialize the decoder properties
 107      */
 108     p_adec->bank_0.actual = p_adec->bank_0.v1;
 109     p_adec->bank_0.pos = 0;
 110     p_adec->bank_1.actual = p_adec->bank_1.v1;
 111     p_adec->bank_1.pos = 0;
 112
 113     /*
 114      * Initialize the output properties
 115      */
 116     p_adec->p_aout = p_input->p_aout;
 117     p_adec->p_aout_fifo = NULL;
 118
 119     /* Spawn the audio decoder thread */
 120     if ( vlc_thread_create(&p_adec->thread_id, "audio decoder", (vlc_thread_func_t)RunThread, (void *)p_adec) )
 121     {
 122         intf_ErrMsg("adec error: can't spawn audio decoder thread\n");
 123         free( p_adec );
 124         return( NULL );
 125     }
 126
 127     intf_DbgMsg("adec debug: audio decoder thread (%p) created\n", p_adec);
 128     return( p_adec );
 129 }
 130
 131 /******************************************************************************
 132  * adec_DestroyThread: destroys an audio decoder thread
 133  ******************************************************************************
 134  * This function asks an audio decoder thread to terminate. This function has
 135  * not to wait until the decoder thread has really died, because the killer (ie
 136  * this function's caller) is the input thread, that's why we are sure that no
 137  * other thread will try to access to this thread's descriptor after its
 138  * destruction.
 139  ******************************************************************************/
 140 void adec_DestroyThread( adec_thread_t * p_adec )
 141 {
 142     intf_DbgMsg("adec debug: requesting termination of audio decoder thread %p\n", p_adec);
 143
 144     /* Ask thread to kill itself */
 145     p_adec->b_die = 1;
 146     /* Make sure the decoder thread leaves the GetByte() function */
 147     vlc_mutex_lock( &(p_adec->fifo.data_lock) );
 148     vlc_cond_signal( &(p_adec->fifo.data_wait) );
 149     vlc_mutex_unlock( &(p_adec->fifo.data_lock) );
 150
 151     /* Waiting for the decoder thread to exit */
 152     /* Remove this as soon as the "status" flag is implemented */
 153     vlc_thread_join( p_adec->thread_id );
 154 }
 155
 156 /* Following functions are local */
 157
 158 /******************************************************************************
 159  * FindHeader : parses an input stream until an audio frame header could be
 160  *              found
 161  ******************************************************************************
 162  * When this function returns successfully, the header can be found in the
 163  * buffer of the bit stream fifo.
 164  ******************************************************************************/
 165 static int FindHeader( adec_thread_t * p_adec )
 166 {
 167     while ( (!p_adec->b_die) && (!p_adec->b_error) )
 168     {
 169         NeedBits( &p_adec->bit_stream, 32 );
 170         if ( (p_adec->bit_stream.fifo.buffer & ADEC_HEADER_SYNCWORD_MASK) == ADEC_HEADER_SYNCWORD_MASK )
 171         {
 172             return( 0 );
 173         }
 174         DumpBits( &p_adec->bit_stream, 8 );
 175     }
 176
 177     return( -1 );
 178 }
 179
 180 /******************************************************************************
 181  * adec_Layer`L'_`M': decodes an mpeg 1, layer `L', mode `M', audio frame
 182  ******************************************************************************
 183  * These functions decode the audio frame which has already its header loaded
 184  * in the i_header member of the audio decoder thread structure and its first
 185  * byte of data described by the bit stream structure of the audio decoder
 186  * thread (there is no bit available in the bit buffer yet)
 187  ******************************************************************************/
 188
 189 /******************************************************************************
 190  * adec_Layer1_Mono
 191  ******************************************************************************/
 192 static __inline__ int adec_Layer1_Mono( adec_thread_t * p_adec )
 193 {
 194     p_adec->bit_stream.fifo.buffer = 0;
 195     p_adec->bit_stream.fifo.i_available = 0;
 196     return( 0 );
 197 }
 198
 199 /******************************************************************************
 200  * adec_Layer1_Stereo
 201  ******************************************************************************/
 202 static __inline__ int adec_Layer1_Stereo( adec_thread_t * p_adec )
 203 {
 204     p_adec->bit_stream.fifo.buffer = 0;
 205     p_adec->bit_stream.fifo.i_available = 0;
 206     return( 0 );
 207 }
 208
 209 /******************************************************************************
 210  * adec_Layer2_Mono
 211  ******************************************************************************/
 212 static __inline__ int adec_Layer2_Mono( adec_thread_t * p_adec )
 213 {
 214     p_adec->bit_stream.fifo.buffer = 0;
 215     p_adec->bit_stream.fifo.i_available = 0;
 216     return( 0 );
 217 }
 218
 219 /******************************************************************************
 220  * adec_Layer2_Stereo
 221  ******************************************************************************/
 222 static __inline__ int adec_Layer2_Stereo( adec_thread_t * p_adec )
 223 {
 224     typedef struct requantization_s
 225     {
 226         byte_t                          i_bits_per_codeword;
 227         const float *                   pf_ungroup;
 228         float                           f_slope;
 229         float                           f_offset;
 230     } requantization_t;
 231
 232     static const float                  pf_scalefactor[64] = ADEC_SCALE_FACTOR;
 233
 234     static u32                          i_header;
 235     static int                          i_sampling_frequency, i_mode, i_bound;
 236     static int                          pi_allocation_0[32], pi_allocation_1[32]; /* see ISO/IEC 11172-3 2.4.1.6 */
 237     int                                 i_sb, i_nbal;
 238     float                               f_scalefactor_0, f_scalefactor_1;
 239
 240     static const byte_t                 ppi_bitrate_per_channel_index[4][15] = ADEC_LAYER2_BITRATE_PER_CHANNEL_INDEX;
 241     static const byte_t                 ppi_sblimit[3][11] = ADEC_LAYER2_SBLIMIT;
 242     static const byte_t                 ppi_nbal[2][32] = ADEC_LAYER2_NBAL;
 243
 244     static const float                  pf_ungroup3[3*3*3 * 3] = ADEC_LAYER2_UNGROUP3;
 245     static const float                  pf_ungroup5[5*5*5 * 3] = ADEC_LAYER2_UNGROUP5;
 246     static const float                  pf_ungroup9[9*9*9 * 3] = ADEC_LAYER2_UNGROUP9;
 247
 248     static const requantization_t       p_requantization_cd[16] = ADEC_LAYER2_REQUANTIZATION_CD;
 249     static const requantization_t       p_requantization_ab1[16] = ADEC_LAYER2_REQUANTIZATION_AB1;
 250     static const requantization_t       p_requantization_ab2[16] = ADEC_LAYER2_REQUANTIZATION_AB2;
 251     static const requantization_t       p_requantization_ab3[16] = ADEC_LAYER2_REQUANTIZATION_AB3;
 252     static const requantization_t       p_requantization_ab4[16] = ADEC_LAYER2_REQUANTIZATION_AB4;
 253     static const requantization_t *     pp_requantization_ab[30] = ADEC_LAYER2_REQUANTIZATION_AB;
 254
 255     static int                          i_sblimit, i_bitrate_per_channel_index;
 256     static int                          pi_scfsi_0[30], pi_scfsi_1[30];
 257     static const byte_t *               pi_nbal;
 258     static float                        ppf_sample_0[3][32], ppf_sample_1[3][32];
 259     static const requantization_t *     pp_requantization_0[30];
 260     static const requantization_t *     pp_requantization_1[30];
 261     static requantization_t             requantization;
 262     static const float *                pf_ungroup;
 263
 264     static float                        pf_scalefactor_0_0[30], pf_scalefactor_0_1[30], pf_scalefactor_0_2[30];
 265     static float                        pf_scalefactor_1_0[30], pf_scalefactor_1_1[30], pf_scalefactor_1_2[30];
 266
 267     int                                 i_2nbal, i_gr;
 268     float                               f_dummy;
 269
 270     long                                l_end_frame;
 271     s16 *                               p_s16;
 272
 273     int                                 i_need = 0, i_dump = 0;
 274 //    static const int                    pi_framesize[512] = ADEC_FRAME_SIZE;
 275
 276     /* Read the audio frame header and flush the bit buffer */
 277     i_header = p_adec->bit_stream.fifo.buffer;
 278     p_adec->bit_stream.fifo.buffer = 0;
 279     p_adec->bit_stream.fifo.i_available = 0;
 280     /* Read the sampling frequency (see ISO/IEC 11172-3 2.4.2.3) */
 281     i_sampling_frequency = (int)((i_header & ADEC_HEADER_SAMPLING_FREQUENCY_MASK)
 282         >> ADEC_HEADER_SAMPLING_FREQUENCY_SHIFT);
 283     /* Read the mode (see ISO/IEC 11172-3 2.4.2.3) */
 284     i_mode = (int)((i_header & ADEC_HEADER_MODE_MASK) >> ADEC_HEADER_MODE_SHIFT);
 285     /* If a CRC can be found in the frame, get rid of it */
 286     if ( (i_header & ADEC_HEADER_PROTECTION_BIT_MASK) == 0 )
 287     {
 288         GetByte( &p_adec->bit_stream );
 289         GetByte( &p_adec->bit_stream );
 290     }
 291
 292     /* Find out the bitrate per channel index */
 293     i_bitrate_per_channel_index = (int)ppi_bitrate_per_channel_index[i_mode]
 294         [(i_header & ADEC_HEADER_BITRATE_INDEX_MASK) >> ADEC_HEADER_BITRATE_INDEX_SHIFT];
 295     /* Find out the number of subbands */
 296     i_sblimit = (int)ppi_sblimit[i_sampling_frequency][i_bitrate_per_channel_index];
 297     /* Check if the frame is valid or not */
 298     if ( i_sblimit == 0 )
 299     {
 300         return( 0 );                                  /* the frame is invalid */
 301     }
 302     /* Find out the number of bits allocated */
 303     pi_nbal = ppi_nbal[ (i_bitrate_per_channel_index <= 2) ? 0 : 1 ];
 304
 305     /* Find out the `bound' subband (see ISO/IEC 11172-3 2.4.2.3) */
 306     if ( i_mode == 1 )
 307     {
 308         i_bound = (int)(((i_header & ADEC_HEADER_MODE_EXTENSION_MASK) >> (ADEC_HEADER_MODE_EXTENSION_SHIFT - 2)) + 4);
 309         if ( i_bound > i_sblimit )
 310         {
 311             i_bound = i_sblimit;
 312         }
 313     }
 314     else
 315     {
 316         i_bound = i_sblimit;
 317     }
 318
 319     /* Read the allocation information (see ISO/IEC 11172-3 2.4.1.6) */
 320     for ( i_sb = 0; i_sb < i_bound; i_sb++ )
 321     {
 322         i_2nbal = 2 * (i_nbal = (int)pi_nbal[ i_sb ]);
 323         NeedBits( &p_adec->bit_stream, i_2nbal );
 324         i_need += i_2nbal;
 325         pi_allocation_0[ i_sb ] = (int)(p_adec->bit_stream.fifo.buffer >> (32 - i_nbal));
 326         p_adec->bit_stream.fifo.buffer <<= i_nbal;
 327         pi_allocation_1[ i_sb ] = (int)(p_adec->bit_stream.fifo.buffer >> (32 - i_nbal));
 328         p_adec->bit_stream.fifo.buffer <<= i_nbal;
 329         p_adec->bit_stream.fifo.i_available -= i_2nbal;
 330         i_dump += i_2nbal;
 331     }
 332     for ( ; i_sb < i_sblimit; i_sb++ )
 333     {
 334         i_nbal = (int)pi_nbal[ i_sb ];
 335         NeedBits( &p_adec->bit_stream, i_nbal );
 336         i_need += i_nbal;
 337         pi_allocation_0[ i_sb ] = (int)(p_adec->bit_stream.fifo.buffer >> (32 - i_nbal));
 338         DumpBits( &p_adec->bit_stream, i_nbal );
 339         i_dump += i_nbal;
 340     }
 341
 342 #define MACRO( p_requantization ) \
 343     for ( i_sb = 0; i_sb < i_bound; i_sb++ ) \
 344     { \
 345         if ( pi_allocation_0[i_sb] ) \
 346         { \
 347             pp_requantization_0[i_sb] = &((p_requantization)[pi_allocation_0[i_sb]]); \
 348             NeedBits( &p_adec->bit_stream, 2 ); \
 349             i_need += 2; \
 350             pi_scfsi_0[i_sb] = (int)(p_adec->bit_stream.fifo.buffer >> (32 - 2)); \
 351             DumpBits( &p_adec->bit_stream, 2 ); \
 352             i_dump += 2; \
 353         } \
 354         else \
 355         { \
 356             ppf_sample_0[0][i_sb] = .0; \
 357             ppf_sample_0[1][i_sb] = .0; \
 358             ppf_sample_0[2][i_sb] = .0; \
 359         } \
 360 \
 361         if ( pi_allocation_1[i_sb] ) \
 362         { \
 363             pp_requantization_1[i_sb] = &((p_requantization)[pi_allocation_1[i_sb]]); \
 364             NeedBits( &p_adec->bit_stream, 2 ); \
 365             i_need += 2; \
 366             pi_scfsi_1[i_sb] = (int)(p_adec->bit_stream.fifo.buffer >> (32 - 2)); \
 367             DumpBits( &p_adec->bit_stream, 2 ); \
 368             i_dump += 2; \
 369         } \
 370         else \
 371         { \
 372             ppf_sample_1[0][i_sb] = .0; \
 373             ppf_sample_1[1][i_sb] = .0; \
 374             ppf_sample_1[2][i_sb] = .0; \
 375         } \
 376     } \
 377 \
 378     for ( ; i_sb < i_sblimit; i_sb++ ) \
 379     { \
 380         if ( pi_allocation_0[i_sb] ) \
 381         { \
 382             pp_requantization_0[i_sb] = &((p_requantization)[pi_allocation_0[i_sb]]); \
 383             NeedBits( &p_adec->bit_stream, 4 ); \
 384             i_need += 4; \
 385             pi_scfsi_0[i_sb] = (int)(p_adec->bit_stream.fifo.buffer >> (32 - 2)); \
 386             p_adec->bit_stream.fifo.buffer <<= 2; \
 387             pi_scfsi_1[i_sb] = (int)(p_adec->bit_stream.fifo.buffer >> (32 - 2)); \
 388             p_adec->bit_stream.fifo.buffer <<= 2; \
 389             p_adec->bit_stream.fifo.i_available -= 4; \
 390             i_dump += 4; \
 391         } \
 392         else \
 393         { \
 394             ppf_sample_0[0][i_sb] = .0; \
 395             ppf_sample_0[1][i_sb] = .0; \
 396             ppf_sample_0[2][i_sb] = .0; \
 397             ppf_sample_1[0][i_sb] = .0; \
 398             ppf_sample_1[1][i_sb] = .0; \
 399             ppf_sample_1[2][i_sb] = .0; \
 400         } \
 401     }
 402 /* #define MACRO */
 403
 404     if ( i_bitrate_per_channel_index <= 2 )
 405     {
 406         MACRO( p_requantization_cd )
 407     }
 408     else
 409     {
 410         MACRO( pp_requantization_ab[i_sb] )
 411     }
 412
 413 #define SWITCH( pi_scfsi, pf_scalefactor_0, pf_scalefactor_1, pf_scalefactor_2 ) \
 414     switch ( (pi_scfsi)[i_sb] ) \
 415     { \
 416         case 0: \
 417             NeedBits( &p_adec->bit_stream, (3*6) ); \
 418             i_need += 18; \
 419             (pf_scalefactor_0)[i_sb] = pf_scalefactor[p_adec->bit_stream.fifo.buffer >> (32 - 6)]; \
 420             p_adec->bit_stream.fifo.buffer <<= 6; \
 421             (pf_scalefactor_1)[i_sb] = pf_scalefactor[p_adec->bit_stream.fifo.buffer >> (32 - 6)]; \
 422             p_adec->bit_stream.fifo.buffer <<= 6; \
 423             (pf_scalefactor_2)[i_sb] = pf_scalefactor[p_adec->bit_stream.fifo.buffer >> (32 - 6)]; \
 424             p_adec->bit_stream.fifo.buffer <<= 6; \
 425             p_adec->bit_stream.fifo.i_available -= (3*6); \
 426             i_dump += 18; \
 427             break; \
 428 \
 429         case 1: \
 430             NeedBits( &p_adec->bit_stream, (2*6) ); \
 431             i_need += 12; \
 432             (pf_scalefactor_0)[i_sb] = \
 433                 (pf_scalefactor_1)[i_sb] = pf_scalefactor[p_adec->bit_stream.fifo.buffer >> (32 - 6)]; \
 434             p_adec->bit_stream.fifo.buffer <<= 6; \
 435             (pf_scalefactor_2)[i_sb] = pf_scalefactor[p_adec->bit_stream.fifo.buffer >> (32 - 6)]; \
 436             p_adec->bit_stream.fifo.buffer <<= 6; \
 437             p_adec->bit_stream.fifo.i_available -= (2*6); \
 438             i_dump += 12; \
 439             break; \
 440 \
 441         case 2: \
 442             NeedBits( &p_adec->bit_stream, (1*6) ); \
 443             i_need += 6; \
 444             (pf_scalefactor_0)[i_sb] = \
 445                 (pf_scalefactor_1)[i_sb] = \
 446                 (pf_scalefactor_2)[i_sb] = pf_scalefactor[p_adec->bit_stream.fifo.buffer >> (32 - 6)]; \
 447             DumpBits( &p_adec->bit_stream, (1*6) ); \
 448             i_dump += 6; \
 449             break; \
 450 \
 451         case 3: \
 452             NeedBits( &p_adec->bit_stream, (2*6) ); \
 453             i_need += 12; \
 454             (pf_scalefactor_0)[i_sb] = pf_scalefactor[p_adec->bit_stream.fifo.buffer >> (32 - 6)]; \
 455             p_adec->bit_stream.fifo.buffer <<= 6; \
 456             (pf_scalefactor_1)[i_sb] = \
 457                 (pf_scalefactor_2)[i_sb] = pf_scalefactor[p_adec->bit_stream.fifo.buffer >> (32 - 6)]; \
 458             p_adec->bit_stream.fifo.buffer <<= 6; \
 459             p_adec->bit_stream.fifo.i_available -= (2*6); \
 460             i_dump += 12; \
 461             break; \
 462     }
 463 /* #define SWITCH */
 464
 465     for ( i_sb = 0; i_sb < i_bound; i_sb++ )
 466     {
 467         if ( pi_allocation_0[i_sb] )
 468         {
 469             SWITCH( pi_scfsi_0, pf_scalefactor_0_0, pf_scalefactor_0_1, pf_scalefactor_0_2 )
 470         }
 471         if ( pi_allocation_1[i_sb] )
 472         {
 473             SWITCH( pi_scfsi_1, pf_scalefactor_1_0, pf_scalefactor_1_1, pf_scalefactor_1_2 )
 474         }
 475     }
 476     for ( ; i_sb < i_sblimit; i_sb++ )
 477     {
 478         if ( pi_allocation_0[i_sb] )
 479         {
 480             SWITCH( pi_scfsi_0, pf_scalefactor_0_0, pf_scalefactor_0_1, pf_scalefactor_0_2 )
 481             SWITCH( pi_scfsi_1, pf_scalefactor_1_0, pf_scalefactor_1_1, pf_scalefactor_1_2 )
 482         }
 483     }
 484     for ( ; i_sb < 32; i_sb++ )
 485     {
 486         ppf_sample_0[0][i_sb] = .0;
 487         ppf_sample_0[1][i_sb] = .0;
 488         ppf_sample_0[2][i_sb] = .0;
 489         ppf_sample_1[0][i_sb] = .0;
 490         ppf_sample_1[1][i_sb] = .0;
 491         ppf_sample_1[2][i_sb] = .0;
 492     }
 493
 494 #define NEXT_BUF \
 495 /* fprintf(stderr, "%p\n", p_adec->p_aout_fifo->buffer); */ \
 496 /* fprintf(stderr, "l_end_frame == %li, %p\n", l_end_frame, (aout_frame_t *)p_adec->p_aout_fifo->buffer + l_end_frame); */ \
 497     p_s16 = ((adec_frame_t *)p_adec->p_aout_fifo->buffer)[ l_end_frame ]; \
 498 /* fprintf(stderr, "p_s16 == %p\n", p_s16); */ \
 499     l_end_frame += 1; \
 500     l_end_frame &= AOUT_FIFO_SIZE;
 501 /* #define NEXT_BUF */
 502
 503 #define GROUPTEST( pp_requantization, ppf_sample, pf_sf ) \
 504     requantization = *((pp_requantization)[i_sb]); \
 505     if ( requantization.pf_ungroup == NULL ) \
 506     { \
 507         NeedBits( &p_adec->bit_stream, requantization.i_bits_per_codeword ); \
 508         i_need += requantization.i_bits_per_codeword; \
 509         (ppf_sample)[0][i_sb] = (f_scalefactor_0 = (pf_sf)[i_sb]) * (requantization.f_slope * \
 510             (p_adec->bit_stream.fifo.buffer >> (32 - requantization.i_bits_per_codeword)) + requantization.f_offset); \
 511         DumpBits( &p_adec->bit_stream, requantization.i_bits_per_codeword ); \
 512         i_dump += requantization.i_bits_per_codeword; \
 513 \
 514         NeedBits( &p_adec->bit_stream, requantization.i_bits_per_codeword ); \
 515         i_need += requantization.i_bits_per_codeword; \
 516         (ppf_sample)[1][i_sb] = f_scalefactor_0 * (requantization.f_slope * \
 517             (p_adec->bit_stream.fifo.buffer >> (32 - requantization.i_bits_per_codeword)) + requantization.f_offset); \
 518         DumpBits( &p_adec->bit_stream, requantization.i_bits_per_codeword ); \
 519         i_dump += requantization.i_bits_per_codeword; \
 520 \
 521         NeedBits( &p_adec->bit_stream, requantization.i_bits_per_codeword ); \
 522         i_need += requantization.i_bits_per_codeword; \
 523         (ppf_sample)[2][i_sb] = f_scalefactor_0 * (requantization.f_slope * \
 524             (p_adec->bit_stream.fifo.buffer >> (32 - requantization.i_bits_per_codeword)) + requantization.f_offset); \
 525         DumpBits( &p_adec->bit_stream, requantization.i_bits_per_codeword ); \
 526         i_dump += requantization.i_bits_per_codeword; \
 527     } \
 528     else \
 529     { \
 530         NeedBits( &p_adec->bit_stream, requantization.i_bits_per_codeword ); \
 531         i_need += requantization.i_bits_per_codeword; \
 532         pf_ungroup = requantization.pf_ungroup + 3 * \
 533             (p_adec->bit_stream.fifo.buffer >> (32 - requantization.i_bits_per_codeword)); \
 534         DumpBits( &p_adec->bit_stream, requantization.i_bits_per_codeword ); \
 535         i_dump += requantization.i_bits_per_codeword; \
 536         (ppf_sample)[0][i_sb] = (f_scalefactor_0 = (pf_sf)[i_sb]) * pf_ungroup[0]; \
 537         (ppf_sample)[1][i_sb] = f_scalefactor_0 * pf_ungroup[1]; \
 538         (ppf_sample)[2][i_sb] = f_scalefactor_0 * pf_ungroup[2]; \
 539     }
 540 /* #define GROUPTEST */
 541
 542 #define READ_SAMPLE_L2S( pf_scalefactor_0, pf_scalefactor_1, i_grlimit ) \
 543     for ( ; i_gr < (i_grlimit); i_gr++ ) \
 544     { \
 545         for ( i_sb = 0; i_sb < i_bound; i_sb++ ) \
 546         { \
 547             if ( pi_allocation_0[i_sb] ) \
 548             { \
 549                 GROUPTEST( pp_requantization_0, ppf_sample_0, (pf_scalefactor_0) ) \
 550             } \
 551             if ( pi_allocation_1[i_sb] ) \
 552             { \
 553                 GROUPTEST( pp_requantization_1, ppf_sample_1, (pf_scalefactor_1) ) \
 554             } \
 555         } \
 556         for ( ; i_sb < i_sblimit; i_sb++ ) \
 557         { \
 558             if ( pi_allocation_0[i_sb] ) \
 559             { \
 560                 requantization = *(pp_requantization_0[i_sb]); \
 561                 if ( requantization.pf_ungroup == NULL ) \
 562                 { \
 563                     NeedBits( &p_adec->bit_stream, requantization.i_bits_per_codeword ); \
 564                     i_need += requantization.i_bits_per_codeword; \
 565                     ppf_sample_0[0][i_sb] = (f_scalefactor_0 = (pf_scalefactor_0)[i_sb]) * \
 566                         (requantization.f_slope * (f_dummy = \
 567                         (float)(p_adec->bit_stream.fifo.buffer >> (32 - requantization.i_bits_per_codeword))) + \
 568                         requantization.f_offset); \
 569                     DumpBits( &p_adec->bit_stream, requantization.i_bits_per_codeword ); \
 570                     i_dump += requantization.i_bits_per_codeword; \
 571                     ppf_sample_1[0][i_sb] = (f_scalefactor_1 = (pf_scalefactor_1)[i_sb]) * \
 572                         (requantization.f_slope * f_dummy + requantization.f_offset); \
 573 \
 574                     NeedBits( &p_adec->bit_stream, requantization.i_bits_per_codeword ); \
 575                     i_need += requantization.i_bits_per_codeword; \
 576                     ppf_sample_0[1][i_sb] = f_scalefactor_0 * \
 577                         (requantization.f_slope * (f_dummy = \
 578                         (float)(p_adec->bit_stream.fifo.buffer >> (32 - requantization.i_bits_per_codeword))) + \
 579                         requantization.f_offset); \
 580                     DumpBits( &p_adec->bit_stream, requantization.i_bits_per_codeword ); \
 581                     i_dump += requantization.i_bits_per_codeword; \
 582                     ppf_sample_1[1][i_sb] = f_scalefactor_1 * \
 583                         (requantization.f_slope * f_dummy + requantization.f_offset); \
 584 \
 585                     NeedBits( &p_adec->bit_stream, requantization.i_bits_per_codeword ); \
 586                     i_need += requantization.i_bits_per_codeword; \
 587                     ppf_sample_0[2][i_sb] = f_scalefactor_0 * \
 588                         (requantization.f_slope * (f_dummy = \
 589                         (float)(p_adec->bit_stream.fifo.buffer >> (32 - requantization.i_bits_per_codeword))) + \
 590                         requantization.f_offset); \
 591                     DumpBits( &p_adec->bit_stream, requantization.i_bits_per_codeword ); \
 592                     i_dump += requantization.i_bits_per_codeword; \
 593                     ppf_sample_1[2][i_sb] = f_scalefactor_1 * \
 594                         (requantization.f_slope * f_dummy + requantization.f_offset); \
 595                 } \
 596                 else \
 597                 { \
 598                     NeedBits( &p_adec->bit_stream, requantization.i_bits_per_codeword ); \
 599                     i_need += requantization.i_bits_per_codeword; \
 600                     pf_ungroup = requantization.pf_ungroup + 3 * \
 601                         (p_adec->bit_stream.fifo.buffer >> (32 - requantization.i_bits_per_codeword)); \
 602                     DumpBits( &p_adec->bit_stream, requantization.i_bits_per_codeword ); \
 603                     i_dump += requantization.i_bits_per_codeword; \
 604 \
 605                     ppf_sample_0[0][i_sb] = (f_scalefactor_0 = (pf_scalefactor_0)[i_sb]) * pf_ungroup[0]; \
 606                     ppf_sample_0[1][i_sb] = f_scalefactor_0 * pf_ungroup[1]; \
 607                     ppf_sample_0[2][i_sb] = f_scalefactor_0 * pf_ungroup[2]; \
 608 \
 609                     ppf_sample_1[0][i_sb] = (f_scalefactor_1 = (pf_scalefactor_1)[i_sb]) * pf_ungroup[0]; \
 610                     ppf_sample_1[1][i_sb] = f_scalefactor_1 * pf_ungroup[1]; \
 611                     ppf_sample_1[2][i_sb] = f_scalefactor_1 * pf_ungroup[2]; \
 612                 } \
 613             } \
 614         } \
 615 \
 616 /* fprintf(stderr, "%p", p_s16); */ \
 617         DCT32( ppf_sample_0[0], &p_adec->bank_0 ); \
 618         PCM( &p_adec->bank_0, &p_s16, 2 ); \
 619 /* fprintf(stderr, " %p", p_s16); */ \
 620         p_s16 -= 63; \
 621 /* fprintf(stderr, " %p\n", p_s16); */ \
 622 \
 623 /* fprintf(stderr, "%p", p_s16); */ \
 624         DCT32( ppf_sample_1[0], &p_adec->bank_1 ); \
 625         PCM( &p_adec->bank_1, &p_s16, 2 ); \
 626 /* fprintf(stderr, " %p", p_s16); */ \
 627         p_s16 -= 1; \
 628 /* fprintf(stderr, " %p\n", p_s16); */ \
 629 \
 630 /* fprintf(stderr, "%p", p_s16); */ \
 631         DCT32( ppf_sample_0[1], &p_adec->bank_0 ); \
 632         PCM( &p_adec->bank_0, &p_s16, 2 ); \
 633 /* fprintf(stderr, " %p", p_s16); */ \
 634         p_s16 -= 63; \
 635 /* fprintf(stderr, " %p\n", p_s16); */ \
 636 \
 637 /* fprintf(stderr, "%p", p_s16); */ \
 638         DCT32( ppf_sample_1[1], &p_adec->bank_1 ); \
 639         PCM( &p_adec->bank_1, &p_s16, 2 ); \
 640 /* fprintf(stderr, " %p", p_s16); */ \
 641         p_s16 -= 1; \
 642 /* fprintf(stderr, " %p\n", p_s16); */ \
 643 \
 644 /* fprintf(stderr, "%p", p_s16); */ \
 645         DCT32( ppf_sample_0[2], &p_adec->bank_0 ); \
 646         PCM( &p_adec->bank_0, &p_s16, 2 ); \
 647 /* fprintf(stderr, " %p", p_s16); */ \
 648         p_s16 -= 63; \
 649 /* fprintf(stderr, " %p\n", p_s16); */ \
 650 \
 651 /* fprintf(stderr, "%p", p_s16); */ \
 652         DCT32( ppf_sample_1[2], &p_adec->bank_1 ); \
 653         PCM( &p_adec->bank_1, &p_s16, 2 ); \
 654 /* fprintf(stderr, " %p", p_s16); */ \
 655         p_s16 -= 1; \
 656 /* fprintf(stderr, " %p\n", p_s16); */ \
 657     }
 658 /* #define READ_SAMPLE_L2S */
 659
 660     l_end_frame = p_adec->p_aout_fifo->l_end_frame;
 661     i_gr = 0;
 662
 663     NEXT_BUF
 664     READ_SAMPLE_L2S( pf_scalefactor_0_0, pf_scalefactor_1_0, 2 )
 665
 666     NEXT_BUF
 667     READ_SAMPLE_L2S( pf_scalefactor_0_0, pf_scalefactor_1_0, 4 )
 668
 669     NEXT_BUF
 670     READ_SAMPLE_L2S( pf_scalefactor_0_1, pf_scalefactor_1_1, 6 )
 671
 672     NEXT_BUF
 673     READ_SAMPLE_L2S( pf_scalefactor_0_1, pf_scalefactor_1_1, 8 )
 674
 675     NEXT_BUF
 676     READ_SAMPLE_L2S( pf_scalefactor_0_2, pf_scalefactor_1_2, 10 )
 677
 678     NEXT_BUF
 679     READ_SAMPLE_L2S( pf_scalefactor_0_2, pf_scalefactor_1_2, 12 )
 680
 681 //    fprintf(stderr, "adec debug: layer == %i, padding_bit == %i, sampling_frequency == %i, bitrate_index == %i\n",
 682 //        (i_header & ADEC_HEADER_LAYER_MASK) >> ADEC_HEADER_LAYER_SHIFT,
 683 //        (i_header & ADEC_HEADER_PADDING_BIT_MASK) >> ADEC_HEADER_PADDING_BIT_SHIFT,
 684 //        (i_header & ADEC_HEADER_SAMPLING_FREQUENCY_MASK) >> ADEC_HEADER_SAMPLING_FREQUENCY_SHIFT,
 685 //        (i_header & ADEC_HEADER_BITRATE_INDEX_MASK) >> ADEC_HEADER_BITRATE_INDEX_SHIFT);
 686 //    fprintf(stderr, "adec debug: framesize == %i, i_need == %i, i_dump == %i\n",
 687 //        pi_framesize[ 128 * ((i_header & ADEC_HEADER_LAYER_MASK) >> ADEC_HEADER_LAYER_SHIFT) +
 688 //            64 * ((i_header & ADEC_HEADER_PADDING_BIT_MASK) >> ADEC_HEADER_PADDING_BIT_SHIFT) +
 689 //            16 * ((i_header & ADEC_HEADER_SAMPLING_FREQUENCY_MASK) >> ADEC_HEADER_SAMPLING_FREQUENCY_SHIFT) +
 690 //            1 * ((i_header & ADEC_HEADER_BITRATE_INDEX_MASK) >> ADEC_HEADER_BITRATE_INDEX_SHIFT) ],
 691 //        i_need,
 692 //        i_dump);
 693     p_adec->bit_stream.fifo.buffer = 0;
 694     p_adec->bit_stream.fifo.i_available = 0;
 695     return( 6 );
 696 }
 697
 698 /******************************************************************************
 699  * InitThread : initialize an audio decoder thread
 700  ******************************************************************************
 701  * This function is called from RunThread and performs the second step of the
 702  * initialization. It returns 0 on success.
 703  ******************************************************************************/
 704 static int InitThread( adec_thread_t * p_adec )
 705 {
 706     aout_fifo_t         aout_fifo;
 707
 708     intf_DbgMsg("adec debug: initializing audio decoder thread %p\n", p_adec);
 709
 710     /* Our first job is to initialize the bit stream structure with the
 711      * beginning of the input stream */
 712     vlc_mutex_lock( &p_adec->fifo.data_lock );
 713     while ( DECODER_FIFO_ISEMPTY(p_adec->fifo) )
 714     {
 715         vlc_cond_wait( &p_adec->fifo.data_wait, &p_adec->fifo.data_lock );
 716         if ( p_adec->bit_stream.p_input->b_die )
 717         {
 718             vlc_mutex_unlock( &p_adec->fifo.data_lock );
 719             return( -1 );
 720         }
 721     }
 722     p_adec->bit_stream.p_ts = DECODER_FIFO_START( p_adec->fifo )->p_first_ts;
 723     p_adec->bit_stream.i_byte = p_adec->bit_stream.p_ts->i_payload_start;
 724     vlc_mutex_unlock( &p_adec->fifo.data_lock );
 725
 726     /* Now we look for an audio frame header in the input stream */
 727     if ( FindHeader(p_adec) )
 728     {
 729         return( -1 );                              /* b_die or b_error is set */
 730     }
 731
 732     /*
 733      * We have the header and all its informations : we must be able to create
 734      * the audio output fifo.
 735      */
 736
 737     /* Is the sound in mono mode or stereo mode ? */
 738     if ( (p_adec->bit_stream.fifo.buffer & ADEC_HEADER_MODE_MASK) == ADEC_HEADER_MODE_MASK )
 739     {
 740         intf_DbgMsg("adec debug: mode == mono\n");
 741         aout_fifo.i_type = AOUT_ADEC_MONO_FIFO;
 742         aout_fifo.b_stereo = 0;
 743     }
 744     else
 745     {
 746         intf_DbgMsg("adec debug: mode == stereo\n");
 747         aout_fifo.i_type = AOUT_ADEC_STEREO_FIFO;
 748         aout_fifo.b_stereo = 1;
 749     }
 750
 751     /* Checking the sampling frequency */
 752     switch ( (p_adec->bit_stream.fifo.buffer & ADEC_HEADER_SAMPLING_FREQUENCY_MASK) \
 753              >> ADEC_HEADER_SAMPLING_FREQUENCY_SHIFT )
 754     {
 755         case 0:
 756             intf_DbgMsg("adec debug: sampling_frequency == 44100 Hz\n");
 757             aout_fifo.l_rate = 44100;
 758             break;
 759
 760         case 1:
 761             intf_DbgMsg("adec debug: sampling_frequency == 48000 Hz\n");
 762             aout_fifo.l_rate = 48000;
 763             break;
 764
 765         case 2:
 766             intf_DbgMsg("adec debug: sampling_frequency == 32000 Hz\n");
 767             aout_fifo.l_rate = 32000;
 768             break;
 769
 770         case 3:
 771             intf_ErrMsg("adec error: can't create audio output fifo (sampling_frequency == `reserved')\n");
 772             return( -1 );
 773     }
 774
 775     aout_fifo.l_frame_size = ADEC_FRAME_SIZE;
 776
 777     /* Creating the audio output fifo */
 778     if ( (p_adec->p_aout_fifo = aout_CreateFifo(p_adec->p_aout, &aout_fifo)) == NULL )
 779     {
 780         return( -1 );
 781     }
 782
 783     intf_DbgMsg("adec debug: audio decoder thread %p initialized\n", p_adec);
 784     return( 0 );
 785 }
 786
 787 /******************************************************************************
 788  * RunThread : audio decoder thread
 789  ******************************************************************************
 790  * Audio decoder thread. This function does only returns when the thread is
 791  * terminated.
 792  ******************************************************************************/
 793 static void RunThread( adec_thread_t * p_adec )
 794 {
 795 //    static const int    pi_framesize[512] = ADEC_FRAME_SIZE;
 796 //    int                 i_header;
 797 //    int                 i_framesize;
 798 //    int                 i_dummy;
 799
 800     intf_DbgMsg("adec debug: running audio decoder thread (%p) (pid == %i)\n", p_adec, getpid());
 801
 802     /* Initializing the audio decoder thread */
 803     if ( InitThread(p_adec) )
 804     {
 805         p_adec->b_error = 1;
 806     }
 807
 808     /* Audio decoder thread's main loop */
 809     while ( (!p_adec->b_die) && (!p_adec->b_error) )
 810     {
 811         switch ( (p_adec->bit_stream.fifo.buffer & ADEC_HEADER_LAYER_MASK) >> ADEC_HEADER_LAYER_SHIFT )
 812         {
 813             /* Reserved */
 814             case 0:
 815                 intf_DbgMsg("adec debug: layer == 0 (reserved)\n");
 816                 p_adec->bit_stream.fifo.buffer = 0;
 817                 p_adec->bit_stream.fifo.i_available = 0;
 818                 break;
 819
 820             /* Layer III */
 821             case 1:
 822                 p_adec->bit_stream.fifo.buffer = 0;
 823                 p_adec->bit_stream.fifo.i_available = 0;
 824                 break;
 825
 826             /* Layer II */
 827             case 2:
 828                 if ( (p_adec->bit_stream.fifo.buffer & ADEC_HEADER_MODE_MASK) == ADEC_HEADER_MODE_MASK )
 829                 {
 830                     adec_Layer2_Mono( p_adec );
 831                 }
 832                 else
 833                 {
 834                     /* Waiting until there is enough free space in the audio output fifo
 835                      * in order to store the new decoded frames */
 836                     vlc_mutex_lock( &p_adec->p_aout_fifo->data_lock );
 837                     /* adec_Layer2_Stereo() produces 6 output frames (2*1152/384)...
 838                      * If these 6 frames were recorded in the audio output fifo, the
 839                      * l_end_frame index would be incremented 6 times. But, if after
 840                      * this operation the audio output fifo contains less than 6 frames,
 841                      * it would mean that we had not enough room to store the 6 frames :-P */
 842                     while ( (((p_adec->p_aout_fifo->l_end_frame + 6) - p_adec->p_aout_fifo->l_start_frame) & AOUT_FIFO_SIZE) < 6 ) /* !! */
 843                     {
 844                         vlc_cond_wait( &p_adec->p_aout_fifo->data_wait, &p_adec->p_aout_fifo->data_lock );
 845                     }
 846                     if ( DECODER_FIFO_START(p_adec->fifo)->b_has_pts )
 847                     {
 848                         p_adec->p_aout_fifo->date[p_adec->p_aout_fifo->l_end_frame] = DECODER_FIFO_START(p_adec->fifo)->i_pts;
 849                         DECODER_FIFO_START(p_adec->fifo)->b_has_pts = 0;
 850                     }
 851                     else
 852                     {
 853                         p_adec->p_aout_fifo->date[p_adec->p_aout_fifo->l_end_frame] = LAST_MDATE;
 854                     }
 855                     vlc_mutex_unlock( &p_adec->p_aout_fifo->data_lock );
 856
 857                     /* Decoding the frames */
 858                     if ( adec_Layer2_Stereo(p_adec) )
 859                     {
 860                         vlc_mutex_lock( &p_adec->p_aout_fifo->data_lock );
 861
 862                         /* Frame 1 */
 863                         p_adec->p_aout_fifo->l_end_frame = (p_adec->p_aout_fifo->l_end_frame + 1) & AOUT_FIFO_SIZE;
 864                         /* Frame 2 */
 865                         p_adec->p_aout_fifo->date[p_adec->p_aout_fifo->l_end_frame] = LAST_MDATE;
 866                         p_adec->p_aout_fifo->l_end_frame = (p_adec->p_aout_fifo->l_end_frame + 1) & AOUT_FIFO_SIZE;
 867                         /* Frame 3 */
 868                         p_adec->p_aout_fifo->date[p_adec->p_aout_fifo->l_end_frame] = LAST_MDATE;
 869                         p_adec->p_aout_fifo->l_end_frame = (p_adec->p_aout_fifo->l_end_frame + 1) & AOUT_FIFO_SIZE;
 870                         /* Frame 4 */
 871                         p_adec->p_aout_fifo->date[p_adec->p_aout_fifo->l_end_frame] = LAST_MDATE;
 872                         p_adec->p_aout_fifo->l_end_frame = (p_adec->p_aout_fifo->l_end_frame + 1) & AOUT_FIFO_SIZE;
 873                         /* Frame 5 */
 874                         p_adec->p_aout_fifo->date[p_adec->p_aout_fifo->l_end_frame] = LAST_MDATE;
 875                         p_adec->p_aout_fifo->l_end_frame = (p_adec->p_aout_fifo->l_end_frame + 1) & AOUT_FIFO_SIZE;
 876                         /* Frame 6 */
 877                         p_adec->p_aout_fifo->date[p_adec->p_aout_fifo->l_end_frame] = LAST_MDATE;
 878                         p_adec->p_aout_fifo->l_end_frame = (p_adec->p_aout_fifo->l_end_frame + 1) & AOUT_FIFO_SIZE;
 879
 880                         vlc_cond_signal( &p_adec->p_aout_fifo->data_wait );
 881
 882                         vlc_mutex_unlock( &p_adec->p_aout_fifo->data_lock );
 883                     }
 884                 }
 885                 break;
 886
 887             /* Layer I */
 888             case 3:
 889                 if ( (p_adec->bit_stream.fifo.buffer & ADEC_HEADER_MODE_MASK) == ADEC_HEADER_MODE_MASK )
 890                 {
 891                     adec_Layer1_Mono( p_adec );
 892                 }
 893                 else
 894                 {
 895                     adec_Layer1_Stereo( p_adec );
 896                 }
 897                 break;
 898
 899             default:
 900                 intf_DbgMsg("adec debug: layer == %i (unknown)\n",
 901                     (p_adec->bit_stream.fifo.buffer & ADEC_HEADER_LAYER_MASK) >> ADEC_HEADER_LAYER_SHIFT);
 902                 p_adec->bit_stream.fifo.buffer = 0;
 903                 p_adec->bit_stream.fifo.i_available = 0;
 904                 break;
 905         }
 906         FindHeader( p_adec );
 907     }
 908
 909     /* If b_error is set, the audio decoder thread enters the error loop */
 910     if ( p_adec->b_error )
 911     {
 912         ErrorThread( p_adec );
 913     }
 914
 915     /* End of the audio decoder thread */
 916     EndThread( p_adec );
 917 }
 918
 919 /******************************************************************************
 920  * ErrorThread : audio decoder's RunThread() error loop
 921  ******************************************************************************
 922  * This function is called when an error occured during thread main's loop. The
 923  * thread can still receive feed, but must be ready to terminate as soon as
 924  * possible.
 925  ******************************************************************************/
 926 static void ErrorThread( adec_thread_t *p_adec )
 927 {
 928     /* We take the lock, because we are going to read/write the start/end
 929      * indexes of the decoder fifo */
 930     vlc_mutex_lock( &p_adec->fifo.data_lock );
 931
 932     /* Wait until a `die' order is sent */
 933     while( !p_adec->b_die )
 934     {
 935         /* Trash all received PES packets */
 936         while( !DECODER_FIFO_ISEMPTY(p_adec->fifo) )
 937         {
 938             input_NetlistFreePES( p_adec->bit_stream.p_input, DECODER_FIFO_START(p_adec->fifo) );
 939             DECODER_FIFO_INCSTART( p_adec->fifo );
 940         }
 941
 942         /* Waiting for the input thread to put new PES packets in the fifo */
 943         vlc_cond_wait( &p_adec->fifo.data_wait, &p_adec->fifo.data_lock );
 944     }
 945
 946     /* We can release the lock before leaving */
 947     vlc_mutex_unlock( &p_adec->fifo.data_lock );
 948 }
 949
 950 /******************************************************************************
 951  * EndThread : audio decoder thread destruction
 952  ******************************************************************************
 953  * This function is called when the thread ends after a sucessfull
 954  * initialization.
 955  ******************************************************************************/
 956 static void EndThread( adec_thread_t *p_adec )
 957 {
 958     intf_DbgMsg("adec debug: destroying audio decoder thread %p\n", p_adec);
 959
 960     /* If the audio output fifo was created, we destroy it */
 961     if ( p_adec->p_aout_fifo != NULL )
 962     {
 963         aout_DestroyFifo( p_adec->p_aout_fifo );
 964     }
 965     /* Destroy descriptor */
 966     free( p_adec );
 967
 968     intf_DbgMsg("adec debug: audio decoder thread %p destroyed\n", p_adec);
 969 }