git.sesse.net Git - vlc/blob - src/video_parser/video_fifo.c

   1 /*******************************************************************************
   2  * video_fifo.c : video FIFO management
   3  * (c)1999 VideoLAN
   4  *******************************************************************************/
   5
   6 /*******************************************************************************
   7  * Preamble
   8  *******************************************************************************/
   9 #include <errno.h>
  10 #include <stdlib.h>
  11 #include <stdio.h>
  12 #include <unistd.h>
  13 #include <string.h>
  14 #include <sys/uio.h>
  15 #include <X11/Xlib.h>
  16 #include <X11/extensions/XShm.h>
  17
  18 #include "config.h"
  19 #include "common.h"
  20 #include "mtime.h"
  21 #include "vlc_thread.h"
  22
  23 #include "intf_msg.h"
  24 #include "debug.h"                      /* ?? temporaire, requis par netlist.h */
  25
  26 #include "input.h"
  27 #include "input_netlist.h"
  28 #include "decoder_fifo.h"
  29 #include "video.h"
  30 #include "video_output.h"
  31
  32 #include "vdec_idct.h"
  33 #include "video_decoder.h"
  34 #include "vdec_motion.h"
  35
  36 #include "vpar_blocks.h"
  37 #include "vpar_headers.h"
  38 #include "video_fifo.h"
  39 #include "vpar_synchro.h"
  40 #include "video_parser.h"
  41
  42 /*****************************************************************************
  43  * vpar_InitFIFO : initialize the video FIFO
  44  *****************************************************************************/
  45 void vpar_InitFIFO( vpar_thread_t * p_vpar )
  46 {
  47     int                 i_dummy;
  48
  49     /* Initialize mutex and cond */
  50     vlc_mutex_init( &p_vpar->vfifo.lock );
  51     vlc_cond_init( &p_vpar->vfifo.wait );
  52     vlc_mutex_init( &p_vpar->vbuffer.lock );
  53
  54     /* Initialize FIFO properties */
  55     p_vpar->vfifo.i_start = p_vpar->vfifo.i_end = 0;
  56     p_vpar->vfifo.p_vpar = p_vpar;
  57
  58     /* Initialize buffer properties */
  59     p_vpar->vbuffer.i_index = VFIFO_SIZE; /* all structures are available */
  60     for( i_dummy = 0; i_dummy < VFIFO_SIZE + 1; i_dummy++ )
  61     {
  62         p_vpar->vbuffer.pp_mb_free[i_dummy] = p_vpar->vbuffer.p_macroblocks
  63                                                + i_dummy;
  64     }
  65 }
  66
  67 /*****************************************************************************
  68  * vpar_GetMacroblock : return a macroblock to be decoded
  69  *****************************************************************************/
  70 macroblock_t * vpar_GetMacroblock( video_fifo_t * p_fifo )
  71 {
  72     macroblock_t *      p_mb;
  73
  74     vlc_mutex_lock( &p_fifo->lock );
  75     while( VIDEO_FIFO_ISEMPTY( *p_fifo ) )
  76     {
  77         vlc_cond_wait( &p_fifo->wait, &p_fifo->lock );
  78         if( p_fifo->p_vpar->b_die )
  79         {
  80             vlc_mutex_unlock( &p_fifo->lock );
  81             return( NULL );
  82         }
  83     }
  84
  85     p_mb = VIDEO_FIFO_START( *p_fifo );
  86     VIDEO_FIFO_INCSTART( *p_fifo );
  87
  88     vlc_mutex_unlock( &p_fifo->lock );
  89
  90     return( p_mb );
  91 }
  92
  93 /*****************************************************************************
  94  * vpar_NewMacroblock : return a buffer for the parser
  95  *****************************************************************************/
  96 macroblock_t * vpar_NewMacroblock( video_fifo_t * p_fifo )
  97 {
  98     macroblock_t *      p_mb;
  99
 100 #define P_buffer p_fifo->p_vpar->vbuffer
 101     vlc_mutex_lock( &P_buffer.lock );
 102     if( P_buffer.i_index == -1 )
 103     {
 104         /* No more structures available. This should not happen ! */
 105 msleep(VPAR_IDLE_SLEEP);
 106 return vpar_NewMacroblock( p_fifo );
 107 //        return NULL;
 108     }
 109
 110     p_mb = P_buffer.pp_mb_free[ P_buffer.i_index-- ];
 111
 112     vlc_mutex_unlock( &P_buffer.lock );
 113 #undef P_buffer
 114     return( p_mb );
 115 }
 116
 117 /*****************************************************************************
 118  * vpar_DecodeMacroblock : put a macroblock in the video fifo
 119  *****************************************************************************/
 120 void vpar_DecodeMacroblock( video_fifo_t * p_fifo, macroblock_t * p_mb )
 121 {
 122     /* Place picture in the video FIFO */
 123     vlc_mutex_lock( &p_fifo->lock );
 124
 125     /* By construction, the video FIFO cannot be full */
 126     VIDEO_FIFO_END( *p_fifo ) = p_mb;
 127     VIDEO_FIFO_INCEND( *p_fifo );
 128
 129     vlc_mutex_unlock( &p_fifo->lock );
 130 }
 131
 132 /*****************************************************************************
 133  * vpar_ReleaseMacroblock : release a macroblock and put the picture in the
 134  *                          video output heap, if it is finished
 135  *****************************************************************************/
 136 void vpar_ReleaseMacroblock( video_fifo_t * p_fifo, macroblock_t * p_mb )
 137 {
 138     /* Unlink picture buffer */
 139     vlc_mutex_lock( &p_mb->p_picture->lock_deccount );
 140     p_mb->p_picture->i_deccount--;
 141 //fprintf(stderr, "%d ", p_mb->p_picture->i_deccount);
 142     /* Test if it was the last block of the picture */
 143     if( p_mb->p_picture->i_deccount == 1 )
 144     {
 145 fprintf(stderr, "Image decodee\n");
 146         /* Mark the picture to be displayed */
 147         vout_DisplayPicture( p_fifo->p_vpar->p_vout, p_mb->p_picture );
 148
 149         /* Warn Synchro for its records. */
 150         vpar_SynchroEnd( p_fifo->p_vpar );
 151
 152         /* Unlink referenced pictures */
 153 /*        if( p_mb->p_forward != NULL )
 154         {
 155                 vout_UnlinkPicture( p_fifo->p_vpar->p_vout, p_mb->p_forward );
 156         }
 157         if( p_mb->p_backward != NULL )
 158         {
 159             vout_UnlinkPicture( p_fifo->p_vpar->p_vout, p_mb->p_backward );
 160         }*/
 161     }
 162     vlc_mutex_unlock( &p_mb->p_picture->lock_deccount );
 163
 164     /* Release the macroblock_t structure */
 165 #define P_buffer p_fifo->p_vpar->vbuffer
 166     vlc_mutex_lock( &P_buffer.lock );
 167     P_buffer.pp_mb_free[ ++P_buffer.i_index ] = p_mb;
 168     vlc_mutex_unlock( &P_buffer.lock );
 169 #undef P_buffer
 170 }
 171
 172 /*****************************************************************************
 173  * vpar_DestroyMacroblock : destroy a macroblock in case of error
 174  *****************************************************************************/
 175 void vpar_DestroyMacroblock( video_fifo_t * p_fifo, macroblock_t * p_mb )
 176 {
 177     /* Release the macroblock_t structure */
 178 #define P_buffer p_fifo->p_vpar->vbuffer
 179     vlc_mutex_lock( &P_buffer.lock );
 180     P_buffer.pp_mb_free[ ++P_buffer.i_index ] = p_mb;
 181     vlc_mutex_unlock( &P_buffer.lock );
 182 #undef P_buffer
 183 }