deinterlace.c

VLC媒体播放程序

            p_in += p_pic->p[i_plane].i_pitch;
            p_out += p_pic->p[i_plane].i_pitch;
            p_vout->p_vlc->pf_memcpy( p_out, p_in,
                                      p_pic->p[i_plane].i_pitch );
        }
    }
    EndMerge();
}

static void RenderMean( vout_thread_t *p_vout,
                        picture_t *p_outpic, picture_t *p_pic )
{
    int i_plane;

    /* Copy image and skip lines */
    for( i_plane = 0 ; i_plane < p_pic->i_planes ; i_plane++ )
    {
        uint8_t *p_in, *p_out_end, *p_out;

        p_in = p_pic->p[i_plane].p_pixels;

        p_out = p_outpic->p[i_plane].p_pixels;
        p_out_end = p_out + p_outpic->p[i_plane].i_pitch
                             * p_outpic->p[i_plane].i_lines;

        /* All lines: mean value */
        for( ; p_out < p_out_end ; )
        {
            Merge( p_out, p_in, p_in + p_pic->p[i_plane].i_pitch,
                   p_pic->p[i_plane].i_pitch );

            p_out += p_pic->p[i_plane].i_pitch;
            p_in += 2 * p_pic->p[i_plane].i_pitch;
        }
    }
    EndMerge();
}

static void RenderBlend( vout_thread_t *p_vout,
                         picture_t *p_outpic, picture_t *p_pic )
{
    int i_plane;

    /* Copy image and skip lines */
    for( i_plane = 0 ; i_plane < p_pic->i_planes ; i_plane++ )
    {
        uint8_t *p_in, *p_out_end, *p_out;

        p_in = p_pic->p[i_plane].p_pixels;

        p_out = p_outpic->p[i_plane].p_pixels;
        p_out_end = p_out + p_outpic->p[i_plane].i_pitch
                             * p_outpic->p[i_plane].i_lines;

        switch( p_vout->render.i_chroma )
        {
            case VLC_FOURCC('I','4','2','0'):
            case VLC_FOURCC('I','Y','U','V'):
            case VLC_FOURCC('Y','V','1','2'):
                /* First line: simple copy */
                p_vout->p_vlc->pf_memcpy( p_out, p_in,
                                          p_pic->p[i_plane].i_pitch );
                p_out += p_pic->p[i_plane].i_pitch;

                /* Remaining lines: mean value */
                for( ; p_out < p_out_end ; )
                {
                   Merge( p_out, p_in, p_in + p_pic->p[i_plane].i_pitch,
                          p_pic->p[i_plane].i_pitch );

                    p_out += p_pic->p[i_plane].i_pitch;
                    p_in += p_pic->p[i_plane].i_pitch;
                }
                break;

            case VLC_FOURCC('I','4','2','2'):
                /* First line: simple copy */
                p_vout->p_vlc->pf_memcpy( p_out, p_in,
                                          p_pic->p[i_plane].i_pitch );
                p_out += p_pic->p[i_plane].i_pitch;

                /* Remaining lines: mean value */
                if( i_plane == Y_PLANE )
                {
                    for( ; p_out < p_out_end ; )
                    {
                        Merge( p_out, p_in, p_in + p_pic->p[i_plane].i_pitch,
                               p_pic->p[i_plane].i_pitch );

                        p_out += p_pic->p[i_plane].i_pitch;
                        p_in += p_pic->p[i_plane].i_pitch;
                    }
                }

                else
                {
                    for( ; p_out < p_out_end ; )
                    {
                        Merge( p_out, p_in, p_in + p_pic->p[i_plane].i_pitch,
                               p_pic->p[i_plane].i_pitch );

                        p_out += p_pic->p[i_plane].i_pitch;
                        p_in += 2*p_pic->p[i_plane].i_pitch;
                    }
                }
                break;
        }
    }
    EndMerge();
}

#undef Merge

static void MergeGeneric( void *_p_dest, const void *_p_s1,
                          const void *_p_s2, size_t i_bytes )
{
    uint8_t* p_dest = (uint8_t*)_p_dest;
    const uint8_t *p_s1 = (const uint8_t *)_p_s1;
    const uint8_t *p_s2 = (const uint8_t *)_p_s2;
    uint8_t* p_end = p_dest + i_bytes - 8;

    while( p_dest < p_end )
    {
        *p_dest++ = ( (uint16_t)(*p_s1++) + (uint16_t)(*p_s2++) ) >> 1;
        *p_dest++ = ( (uint16_t)(*p_s1++) + (uint16_t)(*p_s2++) ) >> 1;
        *p_dest++ = ( (uint16_t)(*p_s1++) + (uint16_t)(*p_s2++) ) >> 1;
        *p_dest++ = ( (uint16_t)(*p_s1++) + (uint16_t)(*p_s2++) ) >> 1;
        *p_dest++ = ( (uint16_t)(*p_s1++) + (uint16_t)(*p_s2++) ) >> 1;
        *p_dest++ = ( (uint16_t)(*p_s1++) + (uint16_t)(*p_s2++) ) >> 1;
        *p_dest++ = ( (uint16_t)(*p_s1++) + (uint16_t)(*p_s2++) ) >> 1;
        *p_dest++ = ( (uint16_t)(*p_s1++) + (uint16_t)(*p_s2++) ) >> 1;
    }

    p_end += 8;

    while( p_dest < p_end )
    {
        *p_dest++ = ( (uint16_t)(*p_s1++) + (uint16_t)(*p_s2++) ) >> 1;
    }
}

#if defined(CAN_COMPILE_MMX)
static void MergeMMX( void *_p_dest, const void *_p_s1, const void *_p_s2,
                      size_t i_bytes )
{
    uint8_t* p_dest = (uint8_t*)_p_dest;
    const uint8_t *p_s1 = (const uint8_t *)_p_s1;
    const uint8_t *p_s2 = (const uint8_t *)_p_s2;
    uint8_t* p_end = p_dest + i_bytes - 8;
    while( p_dest < p_end )
    {
        __asm__  __volatile__( "movq %2,%%mm1;"
                               "pavgb %1, %%mm1;"
                               "movq %%mm1, %0" :"=m" (*p_dest):
                                                 "m" (*p_s1),
                                                 "m" (*p_s2) );
        p_dest += 8;
        p_s1 += 8;
        p_s2 += 8;
    }

    p_end += 8;

    while( p_dest < p_end )
    {
        *p_dest++ = ( (uint16_t)(*p_s1++) + (uint16_t)(*p_s2++) ) >> 1;
    }
}
#endif

#if defined(CAN_COMPILE_SSE)
static void MergeSSE2( void *_p_dest, const void *_p_s1, const void *_p_s2,
                       size_t i_bytes )
{
    uint8_t* p_dest = (uint8_t*)_p_dest;
    const uint8_t *p_s1 = (const uint8_t *)_p_s1;
    const uint8_t *p_s2 = (const uint8_t *)_p_s2;
    uint8_t* p_end = p_dest + i_bytes - 16;
    while( p_dest < p_end )
    {
        __asm__  __volatile__( "movdqu %2,%%xmm1;"
                               "pavgb %1, %%xmm1;"
                               "movdqu %%xmm1, %0" :"=m" (*p_dest):
                                                 "m" (*p_s1),
                                                 "m" (*p_s2) );
        p_dest += 16;
        p_s1 += 16;
        p_s2 += 16;
    }

    p_end += 16;

    while( p_dest < p_end )
    {
        *p_dest++ = ( (uint16_t)(*p_s1++) + (uint16_t)(*p_s2++) ) >> 1;
    }
}
#endif

#if defined(CAN_COMPILE_MMX) || defined(CAN_COMPILE_SSE)
static void EndMMX( void )
{
    __asm__ __volatile__( "emms" :: );
}
#endif

#ifdef CAN_COMPILE_C_ALTIVEC
static void MergeAltivec( void *_p_dest, const void *_p_s1,
                          const void *_p_s2, size_t i_bytes )
{
    uint8_t *p_dest = (uint8_t*)_p_dest;
    const uint8_t *p_s1 = (const uint8_t *)_p_s1;
    const uint8_t *p_s2 = (const uint8_t *)_p_s2;
    uint8_t *p_end = p_dest + i_bytes - 16;

    if( ( (int)p_s1 & 0xF ) | ( (int)p_s2 & 0xF ) |
        ( (int)p_dest & 0xF ) )
    {
        /* TODO Handle non 16-bytes aligned planes */
        MergeGeneric( _p_dest, _p_s1, _p_s2, i_bytes );
        return;
    }

    while( p_dest < p_end )
    {
        vec_st( vec_avg( vec_ld( 0, p_s1 ), vec_ld( 0, p_s2 ) ),
                0, p_dest );
        p_s1   += 16;
        p_s2   += 16;
        p_dest += 16;
    }

    p_end += 16;

    while( p_dest < p_end )
    {
        *p_dest++ = ( (uint16_t)(*p_s1++) + (uint16_t)(*p_s2++) ) >> 1;
    }
}
#endif

/*****************************************************************************
 * SendEvents: forward mouse and keyboard events to the parent p_vout
 *****************************************************************************/
static int SendEvents( vlc_object_t *p_this, char const *psz_var,
                       vlc_value_t oldval, vlc_value_t newval, void *_p_vout )
{
    vout_thread_t *p_vout = (vout_thread_t *)_p_vout;
    vlc_value_t sentval = newval;

    if( !strcmp( psz_var, "mouse-y" ) )
    {
        switch( p_vout->p_sys->i_mode )
        {
            case DEINTERLACE_MEAN:
            case DEINTERLACE_DISCARD:
                sentval.i_int *= 2;
                break;
        }
    }

    var_Set( p_vout, psz_var, sentval );

    return VLC_SUCCESS;
}

/*****************************************************************************
 * FilterCallback: called when changing the deinterlace method on the fly.
 *****************************************************************************/
static int FilterCallback( vlc_object_t *p_this, char const *psz_cmd,
                           vlc_value_t oldval, vlc_value_t newval,
                           void *p_data )
{
    vout_thread_t * p_vout = (vout_thread_t *)p_this;
    int i_old_mode = p_vout->p_sys->i_mode;

    msg_Dbg( p_vout, "using %s deinterlace mode", newval.psz_string );

    vlc_mutex_lock( &p_vout->p_sys->filter_lock );

    SetFilterMethod( p_vout, newval.psz_string );

    switch( p_vout->render.i_chroma )
    {
    case VLC_FOURCC('I','4','2','2'):
        vlc_mutex_unlock( &p_vout->p_sys->filter_lock );
        return VLC_SUCCESS;
        break;

    case VLC_FOURCC('I','4','2','0'):
    case VLC_FOURCC('I','Y','U','V'):
    case VLC_FOURCC('Y','V','1','2'):
        switch( p_vout->p_sys->i_mode )
        {
        case DEINTERLACE_MEAN:
        case DEINTERLACE_DISCARD:
            if( ( i_old_mode == DEINTERLACE_MEAN )
                || ( i_old_mode == DEINTERLACE_DISCARD ) )
            {
                vlc_mutex_unlock( &p_vout->p_sys->filter_lock );
                return VLC_SUCCESS;
            }
            break;

        case DEINTERLACE_BOB:
        case DEINTERLACE_BLEND:
        case DEINTERLACE_LINEAR:
            if( ( i_old_mode == DEINTERLACE_BOB )
                || ( i_old_mode == DEINTERLACE_BLEND )
                || ( i_old_mode == DEINTERLACE_LINEAR ) )
            {
                vlc_mutex_unlock( &p_vout->p_sys->filter_lock );
                return VLC_SUCCESS;
            }
            break;
        }
        break;

    default:
        break;
    }

    /* We need to kill the old vout */

    DEL_CALLBACKS( p_vout->p_sys->p_vout, SendEvents );

    vlc_object_detach( p_vout->p_sys->p_vout );
    vout_Destroy( p_vout->p_sys->p_vout );

    /* Try to open a new video output */
    p_vout->p_sys->p_vout = SpawnRealVout( p_vout );

    if( p_vout->p_sys->p_vout == NULL )
    {
        /* Everything failed */
        msg_Err( p_vout, "cannot open vout, aborting" );

        vlc_mutex_unlock( &p_vout->p_sys->filter_lock );
        return VLC_EGENERIC;
    }

    ADD_CALLBACKS( p_vout->p_sys->p_vout, SendEvents );

    vlc_mutex_unlock( &p_vout->p_sys->filter_lock );
    return VLC_SUCCESS;
}

/*****************************************************************************
 * SendEventsToChild: forward events to the child/children vout
 *****************************************************************************/
static int SendEventsToChild( vlc_object_t *p_this, char const *psz_var,
                       vlc_value_t oldval, vlc_value_t newval, void *p_data )
{
    vout_thread_t *p_vout = (vout_thread_t *)p_this;
    var_Set( p_vout->p_sys->p_vout, psz_var, newval );
    return VLC_SUCCESS;
}