video_output.c 47.1 KB
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/*******************************************************************************
 * video_output.c : video output thread
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 * (c)2000 VideoLAN
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 *******************************************************************************
 * This module describes the programming interface for video output threads.
 * It includes functions allowing to open a new thread, send pictures to a
 * thread, and destroy a previously oppenned video output thread.
 *******************************************************************************/

/*******************************************************************************
 * Preamble
 *******************************************************************************/
#include <errno.h> 
#include <stdlib.h>
#include <stdio.h>
#include <string.h>
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#ifdef VIDEO_X11
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#include <X11/Xlib.h>
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#endif
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#include "common.h"
#include "config.h"
#include "mtime.h"
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#include "vlc_thread.h"
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#include "video.h"
#include "video_output.h"
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#include "video_sys.h"
#include "intf_msg.h"
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#include "main.h"
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/*******************************************************************************
 * Macros
 *******************************************************************************/
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/* CLIP_BYTE: return value if between 0 and 255, else return nearest boundary 
 * (0 or 255) */
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#define CLIP_BYTE( i_val ) ( (i_val < 0) ? 0 : ((i_val > 255) ? 255 : i_val) )

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/* YUV_GRAYSCALE: parametric macro for YUV grayscale transformation.
 * Due to the high performance need of this loop, all possible conditions 
 * evaluations are made outside the transformation loop. However, the code does 
 * not change much for two different loops. This macro allows to change slightly
 * the content of the loop without having to copy and paste code. It is used in 
 * RenderYUVPicture function. */
#define YUV_GRAYSCALE( TRANS_RED, TRANS_GREEN, TRANS_BLUE, P_PIC )      \
/* Main loop */                                                         \
for (i_pic_y=0; i_pic_y < p_pic->i_height ; i_pic_y++)                  \
{                                                                       \
    for (i_pic_x=0; i_pic_x< p_pic->i_width; i_pic_x++)                 \
    {                                                                   \
        i_y = *p_y++;                                                   \
        *P_PIC++ = TRANS_RED[i_y] | TRANS_GREEN[i_y] | TRANS_BLUE[i_y]; \
    }                                                                   \
    /* Skip until beginning of next line */                             \
    P_PIC += i_eol_offset;                                              \
}                                                                       

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/* YUV_TRANSFORM: parametric macro for YUV transformation.
 * Due to the high performance need of this loop, all possible conditions 
 * evaluations are made outside the transformation loop. However, the code does 
 * not change much for two different loops. This macro allows to change slightly
 * the content of the loop without having to copy and paste code. It is used in 
 * RenderYUVPicture function. */
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#define YUV_TRANSFORM( CHROMA, TRANS_RED, TRANS_GREEN, TRANS_BLUE, P_PIC ) \
/* Main loop */                                                         \
for (i_pic_y=0; i_pic_y < p_pic->i_height ; i_pic_y++)                  \
{                                                                       \
    for (i_pic_x=0; i_pic_x< p_pic->i_width; i_pic_x+=2)                \
    {                                                                   \
        /* First sample (complete) */                                   \
        i_y = 76309 * *p_y++ - 1188177;                                 \
        i_u = *p_u++ - 128;                                             \
        i_v = *p_v++ - 128;                                             \
        *P_PIC++ =                                                      \
            TRANS_RED   [(i_y+i_crv*i_v)                >>16] |         \
            TRANS_GREEN [(i_y-i_cgu*i_u-i_cgv*i_v)      >>16] |         \
            TRANS_BLUE  [(i_y+i_cbu*i_u)                >>16];          \
        i_y = 76309 * *p_y++ - 1188177;                                 \
        /* Second sample (partial) */                                   \
        if( CHROMA == 444 )                                             \
        {                                                               \
            i_u = *p_u++ - 128;                                         \
            i_v = *p_v++ - 128;                                         \
        }                                                               \
        *P_PIC++ =                                                      \
            TRANS_RED   [(i_y+i_crv*i_v)                >>16] |         \
            TRANS_GREEN [(i_y-i_cgu*i_u-i_cgv*i_v)      >>16] |         \
            TRANS_BLUE  [(i_y+i_cbu*i_u)                >>16];          \
    }                                                                   \
    if( (CHROMA == 420) && !(i_pic_y & 0x1) )                           \
    {                                                                   \
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        p_u -= i_chroma_width;                                          \
        p_v -= i_chroma_width;                                          \
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    }                                                                   \
    /* Skip until beginning of next line */                             \
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    P_PIC += i_eol_offset;                                              \
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}

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/*******************************************************************************
 * Constants
 *******************************************************************************/
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/* RGB/YUV inversion matrix (ISO/IEC 13818-2 section 6.3.6, table 6.9) */
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const int MATRIX_COEFFICIENTS_TABLE[8][4] =
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{
  {117504, 138453, 13954, 34903},       /* no sequence_display_extension */
  {117504, 138453, 13954, 34903},       /* ITU-R Rec. 709 (1990) */
  {104597, 132201, 25675, 53279},       /* unspecified */
  {104597, 132201, 25675, 53279},       /* reserved */
  {104448, 132798, 24759, 53109},       /* FCC */
  {104597, 132201, 25675, 53279},       /* ITU-R Rec. 624-4 System B, G */
  {104597, 132201, 25675, 53279},       /* SMPTE 170M */
  {117579, 136230, 16907, 35559}        /* SMPTE 240M (1987) */
};

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/*******************************************************************************
 * External prototypes
 *******************************************************************************/
#ifdef HAVE_MMX
/* YUV transformations for MMX - in yuv-mmx.S 
 *      p_y, p_u, p_v:          Y U and V planes
 *      i_width, i_height:      frames dimensions (pixels)
 *      i_ypitch, i_vpitch:     Y and V lines sizes (bytes)
 *      i_aspect:               vertical aspect factor
 *      pi_pic:                 RGB frame
 *      i_dci_offset:           ?? x offset for left image border
 *      i_offset_to_line_0:     ?? x offset for left image border
 *      i_pitch:                RGB line size (bytes)
 *      i_colortype:            0 for 565, 1 for 555 */
void vout_YUV420_16_MMX( u8* p_y, u8* p_u, u8 *p_v, 
                         unsigned int i_width, unsigned int i_height,
                         unsigned int i_ypitch, unsigned int i_vpitch,
                         unsigned int i_aspect, u8 *pi_pic, 
                         u32 i_dci_offset, u32 i_offset_to_line_0,
                         int CCOPitch, int i_colortype );
#endif

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/*******************************************************************************
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 * Local prototypes
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 *******************************************************************************/
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static int      InitThread              ( vout_thread_t *p_vout );
static void     RunThread               ( vout_thread_t *p_vout );
static void     ErrorThread             ( vout_thread_t *p_vout );
static void     EndThread               ( vout_thread_t *p_vout );
static void     RenderPicture           ( vout_thread_t *p_vout, picture_t *p_pic );
static void     RenderYUVGrayPicture    ( vout_thread_t *p_vout, picture_t *p_pic );
static void     RenderYUV16Picture      ( vout_thread_t *p_vout, picture_t *p_pic );
static void     RenderYUV32Picture      ( vout_thread_t *p_vout, picture_t *p_pic );
static void     RenderInfo              ( vout_thread_t *p_vout );
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/*******************************************************************************
 * vout_CreateThread: creates a new video output thread
 *******************************************************************************
 * This function creates a new video output thread, and returns a pointer
 * to its description. On error, it returns NULL.
 * If pi_status is NULL, then the function will block until the thread is ready.
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 * If not, it will be updated using one of the THREAD_* constants.
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 *******************************************************************************/
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vout_thread_t * vout_CreateThread               ( 
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#ifdef VIDEO_X11
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                                                  char *psz_display, Window root_window, 
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#endif
                                                  int i_width, int i_height, int *pi_status 
                                                )
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{
    vout_thread_t * p_vout;                               /* thread descriptor */
    int             i_status;                                 /* thread status */

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    /* Allocate descriptor */
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    p_vout = (vout_thread_t *) malloc( sizeof(vout_thread_t) );
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    if( p_vout == NULL )
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    {
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        intf_ErrMsg("error: %s\n", strerror(ENOMEM));        
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        return( NULL );
    }
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    /* Initialize some fields used by the system-dependant method - these fields will
     * probably be modified by the method */
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    p_vout->b_info              = 0;    
    p_vout->b_grayscale         = main_GetIntVariable( VOUT_GRAYSCALE_VAR, 
                                                       VOUT_GRAYSCALE_DEFAULT );
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    p_vout->i_width             = i_width;
    p_vout->i_height            = i_height;
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    p_vout->i_bytes_per_line    = i_width * 2;    
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    p_vout->i_screen_depth      = 15;
    p_vout->i_bytes_per_pixel   = 2;
    p_vout->f_x_ratio           = 1;
    p_vout->f_y_ratio           = 1;
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    intf_DbgMsg("wished configuration: %dx%d,%d (%d bytes/pixel, %d bytes/line), ratio %.2f:%.2f, gray=%d\n",
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                p_vout->i_width, p_vout->i_height, p_vout->i_screen_depth,
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                p_vout->i_bytes_per_pixel, p_vout->i_bytes_per_line,
                p_vout->f_x_ratio, p_vout->f_y_ratio, p_vout->b_grayscale );
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    /* Create and initialize system-dependant method - this function issues its
     * own error messages */
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    if( vout_SysCreate( p_vout
#if defined(VIDEO_X11)
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                        , psz_display, root_window 
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#endif
        ) )
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    {
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      free( p_vout );
      return( NULL );
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    }
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    intf_DbgMsg("actual configuration: %dx%d,%d (%d bytes/pixel, %d bytes/line), ratio %.2f:%.2f, gray=%d\n",
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                p_vout->i_width, p_vout->i_height, p_vout->i_screen_depth,
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                p_vout->i_bytes_per_pixel, p_vout->i_bytes_per_line,
                p_vout->f_x_ratio, p_vout->f_y_ratio, p_vout->b_grayscale );
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    /* Terminate the initialization */
    p_vout->b_die               = 0;
    p_vout->b_error             = 0;    
    p_vout->b_active            = 0;
    p_vout->pi_status           = (pi_status != NULL) ? pi_status : &i_status;
    *p_vout->pi_status          = THREAD_CREATE;    
#ifdef STATS
    p_vout->c_loops             = 0;
    p_vout->c_idle_loops        = 0;
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    p_vout->c_pictures          = 0;
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#endif      
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    /* Create thread and set locks */
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    vlc_mutex_init( &p_vout->lock );
    if( vlc_thread_create( &p_vout->thread_id, "video output", 
			   (void *) RunThread, (void *) p_vout) )
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    {
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        intf_ErrMsg("error: %s\n", strerror(ENOMEM));
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	vout_SysDestroy( p_vout );
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        free( p_vout );
        return( NULL );
    }   

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    intf_Msg("Video: display initialized (%dx%d, %d bpp)\n", 
             p_vout->i_width, p_vout->i_height, p_vout->i_screen_depth );    

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    /* If status is NULL, wait until the thread is created */
    if( pi_status == NULL )
    {
        do
        {            
            msleep( THREAD_SLEEP );
        }while( (i_status != THREAD_READY) && (i_status != THREAD_ERROR) 
                && (i_status != THREAD_FATAL) );
        if( i_status != THREAD_READY )
        {
            return( NULL );            
        }        
    }
    return( p_vout );
}

/*******************************************************************************
 * vout_DestroyThread: destroys a previously created thread
 *******************************************************************************
 * Destroy a terminated thread. 
 * The function will request a destruction of the specified thread. If pi_error
 * is NULL, it will return once the thread is destroyed. Else, it will be 
 * update using one of the THREAD_* constants.
 *******************************************************************************/
void vout_DestroyThread( vout_thread_t *p_vout, int *pi_status )
{  
    int     i_status;                                         /* thread status */

    /* Set status */
    p_vout->pi_status = (pi_status != NULL) ? pi_status : &i_status;
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    *p_vout->pi_status = THREAD_DESTROY;    
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    /* Request thread destruction */
    p_vout->b_die = 1;

    /* If status is NULL, wait until thread has been destroyed */
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    if( pi_status == NULL )
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    {
        do
        {
            msleep( THREAD_SLEEP );
        }while( (i_status != THREAD_OVER) && (i_status != THREAD_ERROR) 
                && (i_status != THREAD_FATAL) );   
    }
}

/*******************************************************************************
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 * vout_DisplayPicture: display a picture
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 *******************************************************************************
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 * Remove the reservation flag of a picture, which will cause it to be ready for
 * display.
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 *******************************************************************************/
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void  vout_DisplayPicture( vout_thread_t *p_vout, picture_t *p_pic )
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{
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#ifdef DEBUG_VIDEO
    char        psz_date[MSTRTIME_MAX_SIZE];         /* buffer for date string */
#endif
  
   vlc_mutex_lock( &p_vout->lock );

#ifdef DEBUG_VIDEO
   /* Check if picture status is valid */
   if( p_pic->i_status != RESERVED_PICTURE )
   {
       intf_DbgMsg("error: picture %d has invalid status %d\n", 
                   p_pic, p_pic->i_status );       
   }   
#endif
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    /* Remove reservation flag */
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    p_pic->i_status = READY_PICTURE;
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#ifdef STATS
    /* Update stats */
    p_vout->c_pictures++;
#endif

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#ifdef DEBUG_VIDEO
    /* Send picture informations */
    intf_DbgMsg("picture %p: type=%d, %dx%d, date=%s\n", p_pic, p_pic->i_type, 
                p_pic->i_width,p_pic->i_height, mstrtime( psz_date, p_pic->date ) );    
#endif

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    vlc_mutex_unlock( &p_vout->lock );
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}

/*******************************************************************************
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 * vout_CreatePicture: allocate a picture in the video output heap.
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 *******************************************************************************
 * This function create a reserved image in the video output heap. 
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 * A null pointer is returned if the function fails. This method provides an
 * already allocated zone of memory in the picture data fields.
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 *******************************************************************************/
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picture_t *vout_CreatePicture( vout_thread_t *p_vout, int i_type, 
			       int i_width, int i_height, int i_bytes_per_line )
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{
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    int         i_picture;                                    /* picture index */
    picture_t * p_free_picture = NULL;                   /* first free picture */    
    picture_t * p_destroyed_picture = NULL;         /* first destroyed picture */    
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    /* Get lock */
    vlc_mutex_lock( &p_vout->lock );
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    /* 
     * Look for an empty place 
     */
    for( i_picture = 0; 
         i_picture < VOUT_MAX_PICTURES; 
         i_picture++ )
    {
	if( p_vout->p_picture[i_picture].i_status == DESTROYED_PICTURE )
	{
	    /* Picture is marked for destruction, but is still allocated */
	    if( (p_vout->p_picture[i_picture].i_type           == i_type)   &&
		(p_vout->p_picture[i_picture].i_height         == i_height) &&
		(p_vout->p_picture[i_picture].i_bytes_per_line == i_bytes_per_line) )
	    {
		/* Memory size do match : memory will not be reallocated, and function
                 * can end immediately - this is the best possible case, since no
                 * memory allocation needs to be done */
		p_vout->p_picture[i_picture].i_width  = i_width;
		p_vout->p_picture[i_picture].i_status = RESERVED_PICTURE;
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#ifdef DEBUG_VIDEO
                intf_DbgMsg("picture %p (in destroyed picture slot)\n", 
                            &p_vout->p_picture[i_picture] );                
#endif
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		vlc_mutex_unlock( &p_vout->lock );
		return( &p_vout->p_picture[i_picture] );
	    }
	    else if( p_destroyed_picture == NULL )
	    {
		/* Memory size do not match, but picture index will be kept in
		 * case no other place are left */
		p_destroyed_picture = &p_vout->p_picture[i_picture];                
	    }	    
	}
        else if( (p_free_picture == NULL) && 
                 (p_vout->p_picture[i_picture].i_status == FREE_PICTURE ))
        {
	    /* Picture is empty and ready for allocation */
            p_free_picture = &p_vout->p_picture[i_picture];            
        }
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    }

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    /* If no free picture is available, use a destroyed picture */
    if( (p_free_picture == NULL) && (p_destroyed_picture != NULL ) )
    { 
	/* No free picture or matching destroyed picture has been found, but
	 * a destroyed picture is still avalaible */
        free( p_destroyed_picture->p_data );        
        p_free_picture = p_destroyed_picture;        
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    }

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    /*
     * Prepare picture
     */
    if( p_free_picture != NULL )
    {
        /* Allocate memory */
        switch( i_type )
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        {
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        case YUV_420_PICTURE:                   /* YUV picture: bits per pixel */
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        case YUV_422_PICTURE:
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        case YUV_444_PICTURE:
            p_free_picture->p_data = malloc( 3 * i_height * i_bytes_per_line );                
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            p_free_picture->p_y = (yuv_data_t *) p_free_picture->p_data;
            p_free_picture->p_u = (yuv_data_t *)(p_free_picture->p_data + i_height * i_bytes_per_line);
            p_free_picture->p_v = (yuv_data_t *)(p_free_picture->p_data + i_height * i_bytes_per_line * 2);
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            break;                
#ifdef DEBUG
        default:
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            intf_DbgMsg("error: unknown picture type %d\n", i_type );
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            p_free_picture->p_data   =  NULL;            
            break;            
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#endif    
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        }

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        if( p_free_picture->p_data != NULL )
        {        
            /* Copy picture informations */
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            p_free_picture->i_type                      = i_type;
            p_free_picture->i_status                    = RESERVED_PICTURE;
            p_free_picture->i_width                     = i_width;
            p_free_picture->i_height                    = i_height;
            p_free_picture->i_bytes_per_line            = i_bytes_per_line;
            p_free_picture->i_refcount                  = 0;            
            p_free_picture->i_matrix_coefficients       = 1; 
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        }
        else
        {
            /* Memory allocation failed : set picture as empty */
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            p_free_picture->i_type   =  EMPTY_PICTURE;            
            p_free_picture->i_status =  FREE_PICTURE;            
            p_free_picture =            NULL;            
            intf_ErrMsg("warning: %s\n", strerror( ENOMEM ) );            
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        }
        
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#ifdef DEBUG_VIDEO
        intf_DbgMsg("picture %p (in free picture slot)\n", p_free_picture );        
#endif
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        vlc_mutex_unlock( &p_vout->lock );
        return( p_free_picture );
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    }
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    // No free or destroyed picture could be found
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    intf_DbgMsg( "warning: heap is full\n" );
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    vlc_mutex_unlock( &p_vout->lock );
    return( NULL );
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}

/*******************************************************************************
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 * vout_DestroyPicture: remove a permanent or reserved picture from the heap
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 *******************************************************************************
 * This function frees a previously reserved picture or a permanent
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 * picture. It is meant to be used when the construction of a picture aborted.
 * Note that the picture will be destroyed even if it is linked !
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 *******************************************************************************/
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void vout_DestroyPicture( vout_thread_t *p_vout, picture_t *p_pic )
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{
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    vlc_mutex_lock( &p_vout->lock );
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#ifdef DEBUG_VIDEO
   /* Check if picture status is valid */
   if( p_pic->i_status != RESERVED_PICTURE )
   {
       intf_DbgMsg("error: picture %d has invalid status %d\n", 
                   p_pic, p_pic->i_status );       
   }   
#endif

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    p_pic->i_status = DESTROYED_PICTURE;
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#ifdef DEBUG_VIDEO
    intf_DbgMsg("picture %p\n", p_pic);    
#endif

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    vlc_mutex_unlock( &p_vout->lock );
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}

/*******************************************************************************
 * vout_LinkPicture: increment reference counter of a picture
 *******************************************************************************
 * This function increment the reference counter of a picture in the video
 * heap.
 *******************************************************************************/
void vout_LinkPicture( vout_thread_t *p_vout, picture_t *p_pic )
{
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    vlc_mutex_lock( &p_vout->lock );
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    p_pic->i_refcount++;
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#ifdef DEBUG_VIDEO
    intf_DbgMsg("picture %p\n", p_pic);    
#endif

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    vlc_mutex_unlock( &p_vout->lock );
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}

/*******************************************************************************
 * vout_UnlinkPicture: decrement reference counter of a picture
 *******************************************************************************
 * This function decrement the reference counter of a picture in the video heap.
 *******************************************************************************/
void vout_UnlinkPicture( vout_thread_t *p_vout, picture_t *p_pic )
{
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    vlc_mutex_lock( &p_vout->lock );
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    p_pic->i_refcount--;
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    if( (p_pic->i_refcount == 0) && (p_pic->i_status == DISPLAYED_PICTURE) )
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    {
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	p_pic->i_status = DESTROYED_PICTURE;
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    }
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#ifdef DEBUG_VIDEO
    intf_DbgMsg("picture %p\n", p_pic);    
#endif

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    vlc_mutex_unlock( &p_vout->lock );    
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}

/* following functions are local */

/*******************************************************************************
 * InitThread: initialize video output thread
 *******************************************************************************
 * This function is called from RunThread and performs the second step of the
 * initialization. It returns 0 on success. Note that the thread's flag are not
 * modified inside this function.
 *******************************************************************************/
static int InitThread( vout_thread_t *p_vout )
{
    int     i_index;                                          /* generic index */    
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    int     i_pixel_size;     /* pixel size, in bytes, for translations tables */    
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    /* Update status */
    *p_vout->pi_status = THREAD_START;    
    
    /* Initialize pictures */    
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    p_vout->i_pictures = 0;
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    for( i_index = 0; i_index < VOUT_MAX_PICTURES; i_index++)
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    {
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        p_vout->p_picture[i_index].i_type  = EMPTY_PICTURE;
        p_vout->p_picture[i_index].i_status= FREE_PICTURE;
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    }

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#ifdef STATS
    /* Initialize FPS index - since samples won't be used until a minimum of
     * pictures, they don't need to be initialized */
    p_vout->i_fps_index = 0;    
#endif

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    /* Initialize output method - this function issues its own error messages */
    if( vout_SysInit( p_vout ) )
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    {
        *p_vout->pi_status = THREAD_ERROR;        
        return( 1 );
    } 

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    /* Allocate translation tables */
    switch( p_vout->i_bytes_per_pixel )
    {
    case 2:                   /* 15 or 16 bpp, use 16 bits translations tables */        
        i_pixel_size = sizeof( u16 );        
        break;                
    case 3:                   /* 24 or 32 bpp, use 32 bits translations tables */        
    case 4:
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#ifndef DEBUG
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    default:        
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#endif
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        i_pixel_size = sizeof( u32 );
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        break;
#ifdef DEBUG
    default:
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        intf_DbgMsg("error: invalid bytes_per_pixel %d\n", p_vout->i_bytes_per_pixel );
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        i_pixel_size = sizeof( u32 );        
        break;              
#endif
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    }
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    p_vout->pi_trans32_red =   (u32 *)p_vout->pi_trans16_red =   
        (u16 *)malloc( 1024 * i_pixel_size );
    p_vout->pi_trans32_green = (u32 *)p_vout->pi_trans16_green = 
        (u16 *)malloc( 1024 * i_pixel_size );
    p_vout->pi_trans32_blue =  (u32 *)p_vout->pi_trans16_blue =  
        (u16 *)malloc( 1024 * i_pixel_size );
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    if( (p_vout->pi_trans16_red == NULL) || 
        (p_vout->pi_trans16_green == NULL ) ||
        (p_vout->pi_trans16_blue == NULL ) )
    {
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        intf_ErrMsg("error: %s\n", strerror(ENOMEM) );
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        *p_vout->pi_status = THREAD_ERROR;   
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        if( p_vout->pi_trans16_red != NULL )
        {
            free( p_vout->pi_trans16_red );
        }
        if( p_vout->pi_trans16_green != NULL )
        {
            free( p_vout->pi_trans16_green );
        }
        if( p_vout->pi_trans16_blue != NULL )
        {
            free( p_vout->pi_trans16_blue );
        }
        return( 1 );
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    }              
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    /* Translate translation tables */
    p_vout->pi_trans16_red      += 384;
    p_vout->pi_trans16_green    += 384;
    p_vout->pi_trans16_blue     += 384;
    p_vout->pi_trans32_red      += 384;
    p_vout->pi_trans32_green    += 384;
    p_vout->pi_trans32_blue     += 384;

    /* Build translation tables */
    switch( p_vout->i_screen_depth )
    {
    case 15:
        for( i_index = -384; i_index < 640; i_index++) 
        {
            p_vout->pi_trans16_red[i_index]     = (CLIP_BYTE( i_index ) & 0xf8)<<7;
            p_vout->pi_trans16_green[i_index]   = (CLIP_BYTE( i_index ) & 0xf8)<<2;
            p_vout->pi_trans16_blue[i_index]    =  CLIP_BYTE( i_index ) >> 3;
        }
        break;        
    case 16:
        for( i_index = -384; i_index < 640; i_index++) 
        {
            p_vout->pi_trans16_red[i_index]     = (CLIP_BYTE( i_index ) & 0xf8)<<8;
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            p_vout->pi_trans16_green[i_index]   = (CLIP_BYTE( i_index ) & 0xfc)<<3;
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            p_vout->pi_trans16_blue[i_index]    =  CLIP_BYTE( i_index ) >> 3;
        }
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        break;        
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    case 24:
    case 32:        
        for( i_index = -384; i_index < 640; i_index++) 
        {
            p_vout->pi_trans32_red[i_index]     =  CLIP_BYTE( i_index ) <<16;
            p_vout->pi_trans32_green[i_index]   =  CLIP_BYTE( i_index ) <<8;
            p_vout->pi_trans32_blue[i_index]    =  CLIP_BYTE( i_index ) ;
        }
        break;        
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#ifdef DEBUG
    default:
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        intf_DbgMsg("error: invalid screen depth %d\n", p_vout->i_screen_depth );
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        break;      
#endif
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    }
    
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    /* Mark thread as running and return */
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    p_vout->b_active =          1;    
    *p_vout->pi_status =        THREAD_READY;    
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    intf_DbgMsg("thread ready\n");    
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    return(0);    
}

/*******************************************************************************
 * RunThread: video output thread
 *******************************************************************************
 * Video output thread. This function does only returns when the thread is
 * terminated. It handles the pictures arriving in the video heap and the
 * display device events.
 *******************************************************************************/
static void RunThread( vout_thread_t *p_vout)
{
    int             i_picture;                                /* picture index */
    int             i_err;                                       /* error code */
    mtime_t         current_date;                              /* current date */
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    picture_t *     p_pic;                                  /* picture pointer */    
    mtime_t         pic_date = 0;                              /* picture date */    
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    /* 
     * Initialize thread and free configuration 
     */
    p_vout->b_error = InitThread( p_vout );
    if( p_vout->b_error )
    {
        free( p_vout );                                  /* destroy descriptor */
        return;        
    }    

    /*
     * Main loop - it is not executed if an error occured during
     * initialization
     */
    while( (!p_vout->b_die) && (!p_vout->b_error) )
    {
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        /* 
	 * Find the picture to display - this is the only operation requiring
	 * the lock on the picture, since once a READY_PICTURE has been found,
	 * it can't be modified by the other threads (except if it is unliked,
	 * but its data remains)
	 */
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        p_pic = NULL;         
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        vlc_mutex_lock( &p_vout->lock );
	for( i_picture = 0; i_picture < VOUT_MAX_PICTURES; i_picture++ )
	{
	    if( (p_vout->p_picture[i_picture].i_status == READY_PICTURE) &&
		( (p_pic == NULL) || 
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		  (p_vout->p_picture[i_picture].date < pic_date) ) )
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	    {
		p_pic = &p_vout->p_picture[i_picture];
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                pic_date = p_pic->date;                
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	    }
	}
	vlc_mutex_unlock( &p_vout->lock );

        /* 
	 * Render picture if any
	 */
        if( p_pic )
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        {
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#ifdef STATS
            /* Computes FPS rate */
            p_vout->fps_sample[ p_vout->i_fps_index++ ] = pic_date;
            if( p_vout->i_fps_index == VOUT_FPS_SAMPLES )
            {
                p_vout->i_fps_index = 0;                
            }                            
#endif
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	    current_date = mdate();
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	    if( pic_date < current_date )
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	    {
		/* Picture is late: it will be destroyed and the thread will go
		 * immediately to next picture */
		vlc_mutex_lock( &p_vout->lock );
		if( p_pic->i_refcount )
		{
		    p_pic->i_status = DISPLAYED_PICTURE;
		}
		else
		{
		    p_pic->i_status = DESTROYED_PICTURE;
		}
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#ifdef DEBUG_VIDEO
		intf_DbgMsg( "warning: late picture %p skipped\n", p_pic );
#endif
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		vlc_mutex_unlock( &p_vout->lock );
		p_pic = NULL;
	    }
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	    else if( pic_date > current_date + VOUT_DISPLAY_DELAY )
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	    {
		/* A picture is ready to be rendered, but its rendering date is
		 * far from the current one so the thread will perform an empty loop
		 * as if no picture were found. The picture state is unchanged */
		p_pic = NULL;
	    }
	    else
	    {
		/* Picture has not yet been displayed, and has a valid display
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		 * date : render it, then forget it */
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		RenderPicture( p_vout, p_pic );
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                vlc_mutex_lock( &p_vout->lock );
                if( p_pic->i_refcount )
		{
		    p_pic->i_status = DISPLAYED_PICTURE;
		}
		else
		{
		    p_pic->i_status = DESTROYED_PICTURE;
		}
                vlc_mutex_unlock( &p_vout->lock );

                /* Print additional informations */
                if( p_vout->b_info )
                {                    
                    RenderInfo( p_vout );
                }                
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	    }
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        }
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        /*
         * Check events, sleep and display picture
	 */
        i_err = vout_SysManage( p_vout );
	if( i_err < 0 )
	{
	    /* A fatal error occured, and the thread must terminate immediately,
	     * without displaying anything - setting b_error to 1 cause the
	     * immediate end of the main while() loop. */
	    p_vout->b_error = 1;
	}
	else 
	{
	    if( p_pic )
	    {
		/* A picture is ready to be displayed : sleep until its display date */
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		mwait( pic_date );
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		if( !i_err )
		{
		    vout_SysDisplay( p_vout );
		}
	    }
	    else
	    {
		/* Sleep to wait for new pictures */
		msleep( VOUT_IDLE_SLEEP );
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#ifdef STATS
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		/* Update counters */
		p_vout->c_idle_loops++;
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#endif
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	    }
	}
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#ifdef STATS
        /* Update counters */
        p_vout->c_loops++;
#endif
    } 

    /*
     * Error loop
     */
    if( p_vout->b_error )
    {
        ErrorThread( p_vout );        
    }

    /* End of thread */
    EndThread( p_vout );
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    intf_DbgMsg( "thread end\n" );
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}

/*******************************************************************************
 * ErrorThread: RunThread() error loop
 *******************************************************************************
 * This function is called when an error occured during thread main's loop. The
 * thread can still receive feed, but must be ready to terminate as soon as
 * possible.
 *******************************************************************************/
static void ErrorThread( vout_thread_t *p_vout )
{
    /* Wait until a `die' order */
    while( !p_vout->b_die )
    {
        /* Sleep a while */
        msleep( VOUT_IDLE_SLEEP );                
    }
}

/*******************************************************************************
 * EndThread: thread destruction
 *******************************************************************************
 * This function is called when the thread ends after a sucessfull 
 * initialization.
 *******************************************************************************/
static void EndThread( vout_thread_t *p_vout )
{
    int *   pi_status;                                        /* thread status */
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    int     i_picture;
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    /* Store status */
    pi_status = p_vout->pi_status;    
    *pi_status = THREAD_END;    

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    /* Destroy all remaining pictures */
    for( i_picture = 0; i_picture < VOUT_MAX_PICTURES; i_picture++ )
    {
	if( p_vout->p_picture[i_picture].i_status != FREE_PICTURE )
	{
            free( p_vout->p_picture[i_picture].p_data );
        }
    }
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    /* Destroy translation tables - remeber these tables are translated */    
    free( p_vout->pi_trans16_red - 384 );
    free( p_vout->pi_trans16_green - 384 );
    free( p_vout->pi_trans16_blue - 384 );
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    /* Destroy thread structures allocated by InitThread */
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    vout_SysEnd( p_vout );
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    vout_SysDestroy( p_vout );
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    free( p_vout );

    /* Update status */
    *pi_status = THREAD_OVER;    
}

/*******************************************************************************
 * RenderPicture: render a picture
 *******************************************************************************
 * This function convert a picture from a video heap to a pixel-encoded image
 * and copy it to the current rendering buffer. No lock is required, since the
 * rendered picture has been determined as existant, and will only be destroyed
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 * by the vout thread later.
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 * ???? 24 and 32 bpp should probably be separated
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 *******************************************************************************/
static void RenderPicture( vout_thread_t *p_vout, picture_t *p_pic )
{
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#ifdef DEBUG_VIDEO
    /* Send picture informations */
    intf_DbgMsg("picture %p\n", p_pic );

    /* Store rendering start date */
    p_vout->picture_render_time = mdate();    
#endif

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    switch( p_pic->i_type )
    {
    case YUV_420_PICTURE:                   /* YUV picture: YUV transformation */        
    case YUV_422_PICTURE:
    case YUV_444_PICTURE:
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        if( p_vout->b_grayscale )                                 /* grayscale */
        {
            RenderYUVGrayPicture( p_vout, p_pic );            
        }
        else if( p_vout->i_bytes_per_pixel == 2 )        /* color 15 or 16 bpp */
        {
            RenderYUV16Picture( p_vout, p_pic );        
        }
        else                                             /* color 24 or 32 bpp */
        {
            RenderYUV32Picture( p_vout, p_pic );            
        }
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        break;        
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#ifdef DEBUG
    default:        
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        intf_DbgMsg("error: unknown picture type %d\n", p_pic->i_type );
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        break;        
#endif
    }
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#ifdef DEBUG_VIDEO
    /* Computes rendering time */
    p_vout->picture_render_time = mdate() - p_vout->picture_render_time;    
#endif
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}

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/*******************************************************************************
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 * RenderYUVGrayPicture: render a 15, 16, 24 or 32 bpp YUV picture in grayscale
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 *******************************************************************************
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 * Performs the YUV convertion. The picture sent to this function should only
 * have YUV_420, YUV_422 or YUV_444 types.
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 *******************************************************************************/
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static void RenderYUVGrayPicture( vout_thread_t *p_vout, picture_t *p_pic )
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{
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    int         i_pic_x, i_pic_y;                /* x,y coordinates in picture */
    int         i_width, i_height;                             /* picture size */
    int         i_eol_offset;          /* pixels from end of line to next line */   
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    yuv_data_t *p_y;                                     /* Y data base adress */
    yuv_data_t  i_y;                                               /* Y sample */
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    u16 *       pi_pic16;                 /* destination picture, 15 or 16 bpp */
    u32 *       pi_pic32;                 /* destination picture, 24 or 32 bpp */
    u16 *       pi_trans16_red;                    /* red transformation table */
    u16 *       pi_trans16_green;                /* green transformation table */
    u16 *       pi_trans16_blue;                  /* blue transformation table */
    u32 *       pi_trans32_red;                    /* red transformation table */
    u32 *       pi_trans32_green;                /* green transformation table */
    u32 *       pi_trans32_blue;                  /* blue transformation table */
 
    /* Set the base pointers and transformation parameters */
    p_y =               p_pic->p_y;
    i_width =           p_pic->i_width;
    i_height =          p_pic->i_height;
    i_eol_offset =      p_vout->i_bytes_per_line / p_vout->i_bytes_per_pixel - i_width;
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    /* Get base adress for destination image and translation tables, then
     * transform image */
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    switch( p_vout->i_screen_depth )
    {
    case 15:
    case 16:
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        pi_trans16_red =      p_vout->pi_trans16_red;
        pi_trans16_green =    p_vout->pi_trans16_green;
        pi_trans16_blue =     p_vout->pi_trans16_blue;        
        pi_pic16 = (u16 *) vout_SysGetPicture( p_vout );

        YUV_GRAYSCALE( pi_trans16_red, pi_trans16_green, pi_trans16_blue,
                       pi_pic16 );
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        break;        
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    case 24:        
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    case 32:
968 969 970 971 972 973 974 975 976 977 978 979 980 981 982 983 984 985 986 987 988 989 990 991 992 993 994 995 996 997 998 999 1000 1001 1002 1003 1004 1005 1006 1007 1008 1009 1010 1011 1012 1013 1014 1015 1016 1017 1018 1019 1020 1021 1022 1023 1024 1025 1026 1027 1028 1029 1030 1031 1032 1033 1034 1035 1036 1037 1038 1039 1040 1041 1042 1043 1044 1045 1046 1047 1048 1049 1050 1051 1052 1053 1054
        pi_trans32_red =      p_vout->pi_trans32_red;
        pi_trans32_green =    p_vout->pi_trans32_green;
        pi_trans32_blue =     p_vout->pi_trans32_blue;    
        pi_pic32 = (u32 *) vout_SysGetPicture( p_vout );

        YUV_GRAYSCALE( pi_trans32_red, pi_trans32_green, pi_trans32_blue,
                       pi_pic32 );
        break;        
#ifdef DEBUG
    default:
        intf_DbgMsg("error: invalid screen depth %d\n", p_vout->i_screen_depth );
        break;    
#endif      
    }
}


/*******************************************************************************
 * RenderYUV16Picture: render a 15 or 16 bpp YUV picture
 *******************************************************************************
 * Performs the YUV convertion. The picture sent to this function should only
 * have YUV_420, YUV_422 or YUV_444 types.
 *******************************************************************************/
static void RenderYUV16Picture( vout_thread_t *p_vout, picture_t *p_pic )
{
    int         i_crv, i_cbu, i_cgu, i_cgv;     /* transformation coefficients */
    int         i_pic_x, i_pic_y;                /* x,y coordinates in picture */
    int         i_y, i_u, i_v;                           /* Y, U and V samples */
    int         i_width, i_height;                             /* picture size */
    int         i_chroma_width;                                /* chroma width */    
    int         i_eol_offset;          /* pixels from end of line to next line */
    yuv_data_t *p_y;                                     /* Y data base adress */
    yuv_data_t *p_u;                                     /* U data base adress */
    yuv_data_t *p_v;                                     /* V data base adress */
    u16 *       pi_pic;                 /* base adress for destination picture */
    u16 *       pi_trans_red;                      /* red transformation table */
    u16 *       pi_trans_green;                  /* green transformation table */
    u16 *       pi_trans_blue;                    /* blue transformation table */
 
    /* Choose transformation matrix coefficients */
    i_crv = MATRIX_COEFFICIENTS_TABLE[p_pic->i_matrix_coefficients][0];
    i_cbu = MATRIX_COEFFICIENTS_TABLE[p_pic->i_matrix_coefficients][1];
    i_cgu = MATRIX_COEFFICIENTS_TABLE[p_pic->i_matrix_coefficients][2];
    i_cgv = MATRIX_COEFFICIENTS_TABLE[p_pic->i_matrix_coefficients][3];

    /* Choose the conversions tables */
    pi_trans_red =      p_vout->pi_trans16_red;
    pi_trans_green =    p_vout->pi_trans16_green;
    pi_trans_blue =     p_vout->pi_trans16_blue;    

    /* Set the base pointers and transformation parameters */
    p_y =               p_pic->p_y;
    p_u =               p_pic->p_u;
    p_v =               p_pic->p_v;
    i_width =           p_pic->i_width;
    i_height =          p_pic->i_height;
    i_chroma_width =    i_width / 2;
    i_eol_offset =      p_vout->i_bytes_per_line / 2 - i_width;    
        
    /* Get base adress for destination image */
    pi_pic = (u16 *)vout_SysGetPicture( p_vout );

    /* Do YUV transformation - the loops are repeated for optimization */
    switch( p_pic->i_type )
    {
    case YUV_420_PICTURE:                   /* 15 or 16 bpp 420 transformation */
#ifdef HAVE_MMX
        vout_YUV420_16_MMX( p_y, p_u, p_v, 
                            i_width, i_height, 
                            i_width, i_chroma_width,
                            0, (u8 *) pi_pic, 
                            0, 0, p_vout->i_bytes_per_line, 
                            p_vout->i_screen_depth == 15 );
#else
        YUV_TRANSFORM( 420,
                       pi_trans_red, 
                       pi_trans_green, 
                       pi_trans_blue,
                       pi_pic );            
#endif
        break;
    case YUV_422_PICTURE:                   /* 15 or 16 bpp 422 transformation */
        YUV_TRANSFORM( 422,
                       pi_trans_red, 
                       pi_trans_green, 
                       pi_trans_blue,
                       pi_pic );            
1055
        break;
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    case YUV_444_PICTURE:                   /* 15 or 16 bpp 444 transformation */
        YUV_TRANSFORM( 444,
                       pi_trans_red, 
                       pi_trans_green, 
                       pi_trans_blue,
                       pi_pic );            
        break;                 
    }
}

/*******************************************************************************
 * RenderYUV32Picture: render a 24 or 32 bpp YUV picture
 *******************************************************************************
 * Performs the YUV convertion. The picture sent to this function should only
 * have YUV_420, YUV_422 or YUV_444 types.
 *******************************************************************************/
static void RenderYUV32Picture( vout_thread_t *p_vout, picture_t *p_pic )
{
    int         i_crv, i_cbu, i_cgu, i_cgv;     /* transformation coefficients */
    int         i_pic_x, i_pic_y;                /* x,y coordinates in picture */
    int         i_y, i_u, i_v;                           /* Y, U and V samples */
    int         i_width, i_height;                             /* picture size */
    int         i_chroma_width;                                /* chroma width */    
    int         i_eol_offset;          /* pixels from end of line to next line */
    yuv_data_t *p_y;                                     /* Y data base adress */
    yuv_data_t *p_u;                                     /* U data base adress */
    yuv_data_t *p_v;                                     /* V data base adress */
    u32 *       pi_pic;                 /* base adress for destination picture */
    u32 *       pi_trans_red;                      /* red transformation table */
    u32 *       pi_trans_green;                  /* green transformation table */
    u32 *       pi_trans_blue;                    /* blue transformation table */
 
    /* Choose transformation matrix coefficients */
    i_crv = MATRIX_COEFFICIENTS_TABLE[p_pic->i_matrix_coefficients][0];
    i_cbu = MATRIX_COEFFICIENTS_TABLE[p_pic->i_matrix_coefficients][1];
    i_cgu = MATRIX_COEFFICIENTS_TABLE[p_pic->i_matrix_coefficients][2];
    i_cgv = MATRIX_COEFFICIENTS_TABLE[p_pic->i_matrix_coefficients][3];

    /* Choose the conversions tables */
    pi_trans_red =      p_vout->pi_trans32_red;
    pi_trans_green =    p_vout->pi_trans32_green;
    pi_trans_blue =     p_vout->pi_trans32_blue;    

    /* Set the base pointers and transformation parameters */
    p_y =               p_pic->p_y;
    p_u =               p_pic->p_u;
    p_v =               p_pic->p_v;
    i_width =           p_pic->i_width;
    i_height =          p_pic->i_height;
    i_chroma_width =    i_width / 2;
    i_eol_offset =      p_vout->i_bytes_per_line / p_vout->i_bytes_per_pixel - i_width;
        
    /* Get base adress for destination image */
    pi_pic = (u32 *)vout_SysGetPicture( p_vout );

    /* Do YUV transformation - the loops are repeated for optimization */
    switch( p_pic->i_type )
    {
    case YUV_420_PICTURE:                   /* 24 or 32 bpp 420 transformation */
        YUV_TRANSFORM( 420,
                       pi_trans_red, 
                       pi_trans_green, 
                       pi_trans_blue,
                       pi_pic );            
        break;
    case YUV_422_PICTURE:                   /* 24 or 32 bpp 422 transformation */
        YUV_TRANSFORM( 422,
                       pi_trans_red, 
                       pi_trans_green, 
                       pi_trans_blue,
                       pi_pic );            
        break;
    case YUV_444_PICTURE:                   /* 24 or 32 bpp 444 transformation */
        YUV_TRANSFORM( 444,
                       pi_trans_red, 
                       pi_trans_green, 
                       pi_trans_blue,
                       pi_pic );            
        break;                 
    }
}

/*******************************************************************************
 * RenderInfo: print additionnal informations on a picture
 *******************************************************************************
 * This function will add informations such as fps and buffer size on a picture
 *******************************************************************************/
static void RenderInfo( vout_thread_t *p_vout )
{
    char        psz_buffer[256];                              /* string buffer */

#ifdef STATS
    /* Print FPS rate */
    if( p_vout->c_pictures > VOUT_FPS_SAMPLES )
    {        
        sprintf( psz_buffer, "%.2f fps", (double) VOUT_FPS_SAMPLES * 1000000 /
                 ( p_vout->fps_sample[ (p_vout->i_fps_index + (VOUT_FPS_SAMPLES - 1)) % 
                                     VOUT_FPS_SAMPLES ] -
                   p_vout->fps_sample[ p_vout->i_fps_index ] ) );        
        vout_SysPrint( p_vout, p_vout->i_width, 0, 1, -1, psz_buffer );
    }

    /* Print statistics */
    sprintf( psz_buffer, "%ld pictures, %.1f %% idle loops", p_vout->c_pictures,
             (double) p_vout->c_idle_loops * 100 / p_vout->c_loops );    
    vout_SysPrint( p_vout, 0, 0, -1, -1, psz_buffer );    
#endif
    
1164
#ifdef DEBUG
1165 1166 1167 1168 1169 1170 1171 1172 1173 1174 1175
    /* Print heap size  */
    sprintf( psz_buffer, "video heap size: %d (%.1f %%)", p_vout->i_pictures,
             (double) p_vout->i_pictures * 100 / VOUT_MAX_PICTURES );
    vout_SysPrint( p_vout, 0, p_vout->i_height, -1, 1, psz_buffer );    
#endif

#ifdef DEBUG_VIDEO
    /* Print rendering statistics */
    sprintf( psz_buffer, "picture rendering time: %lu us", 
             (unsigned long) p_vout->picture_render_time );    
    vout_SysPrint( p_vout, p_vout->i_width, p_vout->i_height, 1, 1, psz_buffer );    
1176
#endif
1177 1178
}

1179