i420_ymga.c
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上传日期：2009-03-27
资源大小：7338k
文件大小：6k
- /*****************************************************************************
- * i420_ymga.c : YUV to YUV conversion module for vlc
- *****************************************************************************
- * Copyright (C) 2000, 2001 VideoLAN
- * $Id: i420_ymga.c 8551 2004-08-28 17:36:02Z gbazin $
- *
- * 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
- }
- }
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