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/*****************************************************************************
* i420_ymga.c : YUV to YUV conversion module for vlc
*****************************************************************************
* Copyright (C) 2000, 2001 VideoLAN
* $Id$
*
* Authors: Samuel Hocevar <sam@zoy.org>
*
* This program is free software; you can redistribute it and/or modify
* it under the terms of the GNU General Public License as published by
* the Free Software Foundation; either version 2 of the License, or
* (at your option) any later version.
*
* This program is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
* GNU General Public License for more details.
*
* You should have received a copy of the GNU General Public License
* along with this program; if not, write to the Free Software
* Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA 02111, USA.
*****************************************************************************/
/*****************************************************************************
* Preamble
*****************************************************************************/
#include <errno.h> /* ENOMEM */
#include <string.h> /* strerror() */
#include <stdlib.h> /* malloc(), free() */
#include <vlc/vlc.h>
#include <vlc/vout.h>
#define SRC_FOURCC "I420,IYUV,YV12"
#define DEST_FOURCC "YMGA"
/*****************************************************************************
* Local and extern prototypes.
*****************************************************************************/
static int Activate ( vlc_object_t * );
static void I420_YMGA ( vout_thread_t *, picture_t *, picture_t * );
/*****************************************************************************
* Module descriptor
*****************************************************************************/
vlc_module_begin();
#if defined (MODULE_NAME_IS_i420_ymga)
set_description( _("Conversions from " SRC_FOURCC " to " DEST_FOURCC) );
set_capability( "chroma", 80 );
#elif defined (MODULE_NAME_IS_i420_ymga_mmx)
set_description( _("MMX conversions from " SRC_FOURCC " to " DEST_FOURCC) );
set_capability( "chroma", 100 );
add_requirement( MMX );
#endif
set_callbacks( Activate, NULL );
vlc_module_end();
/*****************************************************************************
* Activate: allocate a chroma function
*****************************************************************************
* This function allocates and initializes a chroma function
*****************************************************************************/
static int Activate( vlc_object_t *p_this )
{
vout_thread_t *p_vout = (vout_thread_t *)p_this;
if( p_vout->render.i_width & 1 || p_vout->render.i_height & 1 )
{
return -1;
}
switch( p_vout->render.i_chroma )
{
case VLC_FOURCC('Y','V','1','2'):
case VLC_FOURCC('I','4','2','0'):
case VLC_FOURCC('I','Y','U','V'):
switch( p_vout->output.i_chroma )
{
case VLC_FOURCC('Y','M','G','A'):
p_vout->chroma.pf_convert = I420_YMGA;
break;
default:
return -1;
}
break;
default:
return -1;
}
return 0;
}
/* Following functions are local */
/*****************************************************************************
* I420_YMGA: planar YUV 4:2:0 to Matrox's planar/packed YUV 4:2:0
*****************************************************************************/
static void I420_YMGA( vout_thread_t *p_vout, picture_t *p_source,
picture_t *p_dest )
{
uint8_t *p_uv = p_dest->U_PIXELS;
uint8_t *p_u = p_source->U_PIXELS;
uint8_t *p_v = p_source->V_PIXELS;
int i_x;
/* Copy the Y part */
p_vout->p_vlc->pf_memcpy( p_dest->Y_PIXELS, p_source->Y_PIXELS,
p_dest->p[Y_PLANE].i_pitch * p_dest->p[Y_PLANE].i_visible_lines );
/* Copy the U:V part */
for( i_x = p_dest->p[U_PLANE].i_pitch * p_dest->p[U_PLANE].i_visible_lines / 64;
i_x--; )
{
#if defined (MODULE_NAME_IS_i420_ymga)
*p_uv++ = *p_u++; *p_uv++ = *p_v++; *p_uv++ = *p_u++; *p_uv++ = *p_v++;
*p_uv++ = *p_u++; *p_uv++ = *p_v++; *p_uv++ = *p_u++; *p_uv++ = *p_v++;
*p_uv++ = *p_u++; *p_uv++ = *p_v++; *p_uv++ = *p_u++; *p_uv++ = *p_v++;
*p_uv++ = *p_u++; *p_uv++ = *p_v++; *p_uv++ = *p_u++; *p_uv++ = *p_v++;
*p_uv++ = *p_u++; *p_uv++ = *p_v++; *p_uv++ = *p_u++; *p_uv++ = *p_v++;
*p_uv++ = *p_u++; *p_uv++ = *p_v++; *p_uv++ = *p_u++; *p_uv++ = *p_v++;
*p_uv++ = *p_u++; *p_uv++ = *p_v++; *p_uv++ = *p_u++; *p_uv++ = *p_v++;
*p_uv++ = *p_u++; *p_uv++ = *p_v++; *p_uv++ = *p_u++; *p_uv++ = *p_v++;
#else
__asm__( ".align 32 \n\
movd (%0), %%mm0 # Load 4 Cr 00 00 00 00 v3 v2 v1 v0 \n\
movd 4(%0), %%mm2 # Load 4 Cr 00 00 00 00 v3 v2 v1 v0 \n\
movd 8(%0), %%mm4 # Load 4 Cr 00 00 00 00 v3 v2 v1 v0 \n\
movd 12(%0), %%mm6 # Load 4 Cr 00 00 00 00 v3 v2 v1 v0 \n\
movd (%1), %%mm1 # Load 4 Cb 00 00 00 00 u3 u2 u1 u0 \n\
movd 4(%1), %%mm3 # Load 4 Cb 00 00 00 00 u3 u2 u1 u0 \n\
movd 8(%1), %%mm5 # Load 4 Cb 00 00 00 00 u3 u2 u1 u0 \n\
movd 12(%1), %%mm7 # Load 4 Cb 00 00 00 00 u3 u2 u1 u0 \n\
punpcklbw %%mm1, %%mm0 # u3 v3 u2 v2 u1 v1 u0 v0 \n\
punpcklbw %%mm3, %%mm2 # u3 v3 u2 v2 u1 v1 u0 v0 \n\
punpcklbw %%mm5, %%mm4 # u3 v3 u2 v2 u1 v1 u0 v0 \n\
punpcklbw %%mm7, %%mm6 # u3 v3 u2 v2 u1 v1 u0 v0 \n\
movq %%mm0, (%2) # Store CrCb \n\
movq %%mm2, 8(%2) # Store CrCb \n\
movq %%mm4, 16(%2) # Store CrCb \n\
movq %%mm6, 24(%2) # Store CrCb"
: : "r" (p_v), "r" (p_u), "r" (p_uv) );
p_v += 16; p_u += 16; p_uv += 32;
#endif
}
}