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vlc/modules/video_chroma/i420_rgb.c

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/*****************************************************************************
* i420_rgb.c : YUV to bitmap RGB conversion module for vlc
*****************************************************************************
* Copyright (C) 2000, 2001, 2004, 2008 the VideoLAN team
* $Id$
*
* Authors: Sam Hocevar <sam@zoy.org>
* Damien Fouilleul <damienf@videolan.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., 51 Franklin Street, Fifth Floor, Boston MA 02110-1301, USA.
*****************************************************************************/
/*****************************************************************************
* Preamble
*****************************************************************************/
#ifdef HAVE_CONFIG_H
# include "config.h"
#endif
#include <math.h> /* exp(), pow() */
#include <vlc_common.h>
#include <vlc_plugin.h>
#include <vlc_filter.h>
#include <vlc_cpu.h>
#include "i420_rgb.h"
#if defined (MODULE_NAME_IS_i420_rgb)
# include "i420_rgb_c.h"
static picture_t *I420_RGB8_Filter ( filter_t *, picture_t * );
// static picture_t *I420_RGB16_dither_Filter ( filter_t *, picture_t * );
static picture_t *I420_RGB16_Filter ( filter_t *, picture_t * );
static picture_t *I420_RGB32_Filter ( filter_t *, picture_t * );
#else
static picture_t *I420_R5G5B5_Filter ( filter_t *, picture_t * );
static picture_t *I420_R5G6B5_Filter ( filter_t *, picture_t * );
static picture_t *I420_A8R8G8B8_Filter ( filter_t *, picture_t * );
static picture_t *I420_R8G8B8A8_Filter ( filter_t *, picture_t * );
static picture_t *I420_B8G8R8A8_Filter ( filter_t *, picture_t * );
static picture_t *I420_A8B8G8R8_Filter ( filter_t *, picture_t * );
#endif
/*****************************************************************************
* RGB2PIXEL: assemble RGB components to a pixel value, returns a uint32_t
*****************************************************************************/
#define RGB2PIXEL( p_filter, i_r, i_g, i_b ) \
(((((uint32_t)i_r) >> p_filter->fmt_out.video.i_rrshift) \
<< p_filter->fmt_out.video.i_lrshift) \
| ((((uint32_t)i_g) >> p_filter->fmt_out.video.i_rgshift) \
<< p_filter->fmt_out.video.i_lgshift) \
| ((((uint32_t)i_b) >> p_filter->fmt_out.video.i_rbshift) \
<< p_filter->fmt_out.video.i_lbshift))
/*****************************************************************************
* Local and extern prototypes.
*****************************************************************************/
static int Activate ( vlc_object_t * );
static void Deactivate ( vlc_object_t * );
#if defined (MODULE_NAME_IS_i420_rgb)
static void SetGammaTable ( int *pi_table, double f_gamma );
static void SetYUV ( filter_t * );
static void Set8bppPalette ( filter_t *, uint8_t * );
#endif
/*****************************************************************************
* Module descriptor.
*****************************************************************************/
vlc_module_begin ()
#if defined (MODULE_NAME_IS_i420_rgb)
set_description( N_("I420,IYUV,YV12 to "
"RGB2,RV15,RV16,RV24,RV32 conversions") )
set_capability( "video filter2", 80 )
#elif defined (MODULE_NAME_IS_i420_rgb_mmx)
set_description( N_( "MMX I420,IYUV,YV12 to "
"RV15,RV16,RV24,RV32 conversions") )
set_capability( "video filter2", 100 )
add_requirement( MMX )
#elif defined (MODULE_NAME_IS_i420_rgb_sse2)
set_description( N_( "SSE2 I420,IYUV,YV12 to "
"RV15,RV16,RV24,RV32 conversions") )
set_capability( "video filter2", 120 )
add_requirement( SSE2 )
#endif
set_callbacks( Activate, Deactivate )
vlc_module_end ()
/*****************************************************************************
* Activate: allocate a chroma function
*****************************************************************************
* This function allocates and initializes a chroma function
*****************************************************************************/
static int Activate( vlc_object_t *p_this )
{
filter_t *p_filter = (filter_t *)p_this;
#if defined (MODULE_NAME_IS_i420_rgb)
size_t i_tables_size;
#endif
if( p_filter->fmt_out.video.i_width & 1
|| p_filter->fmt_out.video.i_height & 1 )
{
return VLC_EGENERIC;
}
switch( p_filter->fmt_in.video.i_chroma )
{
case VLC_CODEC_YV12:
case VLC_CODEC_I420:
switch( p_filter->fmt_out.video.i_chroma )
{
#if defined (MODULE_NAME_IS_i420_rgb)
case VLC_CODEC_RGB8:
p_filter->pf_video_filter = I420_RGB8_Filter;
break;
#endif
case VLC_CODEC_RGB15:
case VLC_CODEC_RGB16:
#if ! defined (MODULE_NAME_IS_i420_rgb)
/* If we don't have support for the bitmasks, bail out */
if( ( p_filter->fmt_out.video.i_rmask == 0x7c00
&& p_filter->fmt_out.video.i_gmask == 0x03e0
&& p_filter->fmt_out.video.i_bmask == 0x001f ) )
{
/* R5G5B6 pixel format */
msg_Dbg(p_this, "RGB pixel format is R5G5B5");
p_filter->pf_video_filter = I420_R5G5B5_Filter;
}
else if( ( p_filter->fmt_out.video.i_rmask == 0xf800
&& p_filter->fmt_out.video.i_gmask == 0x07e0
&& p_filter->fmt_out.video.i_bmask == 0x001f ) )
{
/* R5G6B5 pixel format */
msg_Dbg(p_this, "RGB pixel format is R5G6B5");
p_filter->pf_video_filter = I420_R5G6B5_Filter;
}
else
return VLC_EGENERIC;
#else
// generic C chroma converter */
p_filter->pf_video_filter = I420_RGB16_Filter;
#endif
break;
#if 0
/* Hmmm, is there only X11 using 32bits per pixel for RV24 ? */
case VLC_CODEC_RGB24:
#endif
case VLC_CODEC_RGB32:
#if ! defined (MODULE_NAME_IS_i420_rgb)
/* If we don't have support for the bitmasks, bail out */
if( p_filter->fmt_out.video.i_rmask == 0x00ff0000
&& p_filter->fmt_out.video.i_gmask == 0x0000ff00
&& p_filter->fmt_out.video.i_bmask == 0x000000ff )
{
/* A8R8G8B8 pixel format */
msg_Dbg(p_this, "RGB pixel format is A8R8G8B8");
p_filter->pf_video_filter = I420_A8R8G8B8_Filter;
}
else if( p_filter->fmt_out.video.i_rmask == 0xff000000
&& p_filter->fmt_out.video.i_gmask == 0x00ff0000
&& p_filter->fmt_out.video.i_bmask == 0x0000ff00 )
{
/* R8G8B8A8 pixel format */
msg_Dbg(p_this, "RGB pixel format is R8G8B8A8");
p_filter->pf_video_filter = I420_R8G8B8A8_Filter;
}
else if( p_filter->fmt_out.video.i_rmask == 0x0000ff00
&& p_filter->fmt_out.video.i_gmask == 0x00ff0000
&& p_filter->fmt_out.video.i_bmask == 0xff000000 )
{
/* B8G8R8A8 pixel format */
msg_Dbg(p_this, "RGB pixel format is B8G8R8A8");
p_filter->pf_video_filter = I420_B8G8R8A8_Filter;
}
else if( p_filter->fmt_out.video.i_rmask == 0x000000ff
&& p_filter->fmt_out.video.i_gmask == 0x0000ff00
&& p_filter->fmt_out.video.i_bmask == 0x00ff0000 )
{
/* A8B8G8R8 pixel format */
msg_Dbg(p_this, "RGB pixel format is A8B8G8R8");
p_filter->pf_video_filter = I420_A8B8G8R8_Filter;
}
else
return VLC_EGENERIC;
#else
/* generic C chroma converter */
p_filter->pf_video_filter = I420_RGB32_Filter;
#endif
break;
default:
return VLC_EGENERIC;
}
break;
default:
return VLC_EGENERIC;
}
p_filter->p_sys = malloc( sizeof( filter_sys_t ) );
if( p_filter->p_sys == NULL )
{
return VLC_EGENERIC;
}
switch( p_filter->fmt_out.video.i_chroma )
{
#if defined (MODULE_NAME_IS_i420_rgb)
case VLC_CODEC_RGB8:
p_filter->p_sys->p_buffer = malloc( VOUT_MAX_WIDTH );
break;
#endif
case VLC_CODEC_RGB15:
case VLC_CODEC_RGB16:
p_filter->p_sys->p_buffer = malloc( VOUT_MAX_WIDTH * 2 );
break;
case VLC_CODEC_RGB24:
case VLC_CODEC_RGB32:
p_filter->p_sys->p_buffer = malloc( VOUT_MAX_WIDTH * 4 );
break;
default:
p_filter->p_sys->p_buffer = NULL;
break;
}
if( p_filter->p_sys->p_buffer == NULL )
{
free( p_filter->p_sys );
return VLC_EGENERIC;
}
p_filter->p_sys->p_offset = malloc( p_filter->fmt_out.video.i_width
* ( ( p_filter->fmt_out.video.i_chroma
== VLC_CODEC_RGB8 ) ? 2 : 1 )
* sizeof( int ) );
if( p_filter->p_sys->p_offset == NULL )
{
free( p_filter->p_sys->p_buffer );
free( p_filter->p_sys );
return VLC_EGENERIC;
}
#if defined (MODULE_NAME_IS_i420_rgb)
switch( p_filter->fmt_out.video.i_chroma )
{
case VLC_CODEC_RGB8:
i_tables_size = sizeof( uint8_t ) * PALETTE_TABLE_SIZE;
break;
case VLC_CODEC_RGB15:
case VLC_CODEC_RGB16:
i_tables_size = sizeof( uint16_t ) * RGB_TABLE_SIZE;
break;
default: /* RV24, RV32 */
i_tables_size = sizeof( uint32_t ) * RGB_TABLE_SIZE;
break;
}
p_filter->p_sys->p_base = malloc( i_tables_size );
if( p_filter->p_sys->p_base == NULL )
{
free( p_filter->p_sys->p_offset );
free( p_filter->p_sys->p_buffer );
free( p_filter->p_sys );
return -1;
}
SetYUV( p_filter );
#endif
return 0;
}
/*****************************************************************************
* Deactivate: free the chroma function
*****************************************************************************
* This function frees the previously allocated chroma function
*****************************************************************************/
static void Deactivate( vlc_object_t *p_this )
{
filter_t *p_filter = (filter_t *)p_this;
#if defined (MODULE_NAME_IS_i420_rgb)
free( p_filter->p_sys->p_base );
#endif
free( p_filter->p_sys->p_offset );
free( p_filter->p_sys->p_buffer );
free( p_filter->p_sys );
}
#if defined (MODULE_NAME_IS_i420_rgb)
VIDEO_FILTER_WRAPPER( I420_RGB8 )
VIDEO_FILTER_WRAPPER( I420_RGB16 )
//VIDEO_FILTER_WRAPPER( I420_RGB16_dither )
VIDEO_FILTER_WRAPPER( I420_RGB32 )
#else
VIDEO_FILTER_WRAPPER( I420_R5G5B5 )
VIDEO_FILTER_WRAPPER( I420_R5G6B5 )
VIDEO_FILTER_WRAPPER( I420_A8R8G8B8 )
VIDEO_FILTER_WRAPPER( I420_R8G8B8A8 )
VIDEO_FILTER_WRAPPER( I420_B8G8R8A8 )
VIDEO_FILTER_WRAPPER( I420_A8B8G8R8 )
#endif
#if defined (MODULE_NAME_IS_i420_rgb)
/*****************************************************************************
* SetGammaTable: return intensity table transformed by gamma curve.
*****************************************************************************
* pi_table is a table of 256 entries from 0 to 255.
*****************************************************************************/
static void SetGammaTable( int *pi_table, double f_gamma )
{
int i_y; /* base intensity */
/* Use exp(gamma) instead of gamma */
f_gamma = exp( f_gamma );
/* Build gamma table */
for( i_y = 0; i_y < 256; i_y++ )
{
pi_table[ i_y ] = (int)( pow( (double)i_y / 256, f_gamma ) * 256 );
}
}
/*****************************************************************************
* SetYUV: compute tables and set function pointers
*****************************************************************************/
static void SetYUV( filter_t *p_filter )
{
int pi_gamma[256]; /* gamma table */
volatile int i_index; /* index in tables */
/* We use volatile here to work around a strange gcc-3.3.4
* optimization bug */
/* Build gamma table */
SetGammaTable( pi_gamma, 0 ); //p_filter/*FIXME wasn't used anywhere anyway*/->f_gamma );
/*
* Set pointers and build YUV tables
*/
/* Color: build red, green and blue tables */
switch( p_filter->fmt_out.video.i_chroma )
{
case VLC_CODEC_RGB8:
p_filter->p_sys->p_rgb8 = (uint8_t *)p_filter->p_sys->p_base;
Set8bppPalette( p_filter, p_filter->p_sys->p_rgb8 );
break;
case VLC_CODEC_RGB15:
case VLC_CODEC_RGB16:
p_filter->p_sys->p_rgb16 = (uint16_t *)p_filter->p_sys->p_base;
for( i_index = 0; i_index < RED_MARGIN; i_index++ )
{
p_filter->p_sys->p_rgb16[RED_OFFSET - RED_MARGIN + i_index] = RGB2PIXEL( p_filter, pi_gamma[0], 0, 0 );
p_filter->p_sys->p_rgb16[RED_OFFSET + 256 + i_index] = RGB2PIXEL( p_filter, pi_gamma[255], 0, 0 );
}
for( i_index = 0; i_index < GREEN_MARGIN; i_index++ )
{
p_filter->p_sys->p_rgb16[GREEN_OFFSET - GREEN_MARGIN + i_index] = RGB2PIXEL( p_filter, 0, pi_gamma[0], 0 );
p_filter->p_sys->p_rgb16[GREEN_OFFSET + 256 + i_index] = RGB2PIXEL( p_filter, 0, pi_gamma[255], 0 );
}
for( i_index = 0; i_index < BLUE_MARGIN; i_index++ )
{
p_filter->p_sys->p_rgb16[BLUE_OFFSET - BLUE_MARGIN + i_index] = RGB2PIXEL( p_filter, 0, 0, pi_gamma[0] );
p_filter->p_sys->p_rgb16[BLUE_OFFSET + BLUE_MARGIN + i_index] = RGB2PIXEL( p_filter, 0, 0, pi_gamma[255] );
}
for( i_index = 0; i_index < 256; i_index++ )
{
p_filter->p_sys->p_rgb16[RED_OFFSET + i_index] = RGB2PIXEL( p_filter, pi_gamma[ i_index ], 0, 0 );
p_filter->p_sys->p_rgb16[GREEN_OFFSET + i_index] = RGB2PIXEL( p_filter, 0, pi_gamma[ i_index ], 0 );
p_filter->p_sys->p_rgb16[BLUE_OFFSET + i_index] = RGB2PIXEL( p_filter, 0, 0, pi_gamma[ i_index ] );
}
break;
case VLC_CODEC_RGB24:
case VLC_CODEC_RGB32:
p_filter->p_sys->p_rgb32 = (uint32_t *)p_filter->p_sys->p_base;
for( i_index = 0; i_index < RED_MARGIN; i_index++ )
{
p_filter->p_sys->p_rgb32[RED_OFFSET - RED_MARGIN + i_index] = RGB2PIXEL( p_filter, pi_gamma[0], 0, 0 );
p_filter->p_sys->p_rgb32[RED_OFFSET + 256 + i_index] = RGB2PIXEL( p_filter, pi_gamma[255], 0, 0 );
}
for( i_index = 0; i_index < GREEN_MARGIN; i_index++ )
{
p_filter->p_sys->p_rgb32[GREEN_OFFSET - GREEN_MARGIN + i_index] = RGB2PIXEL( p_filter, 0, pi_gamma[0], 0 );
p_filter->p_sys->p_rgb32[GREEN_OFFSET + 256 + i_index] = RGB2PIXEL( p_filter, 0, pi_gamma[255], 0 );
}
for( i_index = 0; i_index < BLUE_MARGIN; i_index++ )
{
p_filter->p_sys->p_rgb32[BLUE_OFFSET - BLUE_MARGIN + i_index] = RGB2PIXEL( p_filter, 0, 0, pi_gamma[0] );
p_filter->p_sys->p_rgb32[BLUE_OFFSET + BLUE_MARGIN + i_index] = RGB2PIXEL( p_filter, 0, 0, pi_gamma[255] );
}
for( i_index = 0; i_index < 256; i_index++ )
{
p_filter->p_sys->p_rgb32[RED_OFFSET + i_index] = RGB2PIXEL( p_filter, pi_gamma[ i_index ], 0, 0 );
p_filter->p_sys->p_rgb32[GREEN_OFFSET + i_index] = RGB2PIXEL( p_filter, 0, pi_gamma[ i_index ], 0 );
p_filter->p_sys->p_rgb32[BLUE_OFFSET + i_index] = RGB2PIXEL( p_filter, 0, 0, pi_gamma[ i_index ] );
}
break;
}
}
static void Set8bppPalette( filter_t *p_filter, uint8_t *p_rgb8 )
{
#define CLIP( x ) ( ((x < 0) ? 0 : (x > 255) ? 255 : x) << 8 )
int y,u,v;
int r,g,b;
int i = 0, j = 0;
uint16_t *p_cmap_r = p_filter->p_sys->p_rgb_r;
uint16_t *p_cmap_g = p_filter->p_sys->p_rgb_g;
uint16_t *p_cmap_b = p_filter->p_sys->p_rgb_b;
unsigned char p_lookup[PALETTE_TABLE_SIZE];
/* This loop calculates the intersection of an YUV box and the RGB cube. */
for ( y = 0; y <= 256; y += 16, i += 128 - 81 )
{
for ( u = 0; u <= 256; u += 32 )
{
for ( v = 0; v <= 256; v += 32 )
{
r = y + ( (V_RED_COEF*(v-128)) >> SHIFT );
g = y + ( (U_GREEN_COEF*(u-128)
+ V_GREEN_COEF*(v-128)) >> SHIFT );
b = y + ( (U_BLUE_COEF*(u-128)) >> SHIFT );
if( r >= 0x00 && g >= 0x00 && b >= 0x00
&& r <= 0xff && g <= 0xff && b <= 0xff )
{
/* This one should never happen unless someone
* fscked up my code */
if( j == 256 )
{
msg_Err( p_filter, "no colors left in palette" );
break;
}
/* Clip the colors */
p_cmap_r[ j ] = CLIP( r );
p_cmap_g[ j ] = CLIP( g );
p_cmap_b[ j ] = CLIP( b );
#if 0
printf("+++Alloc RGB cmap %d (%d, %d, %d)\n", j,
p_cmap_r[ j ] >>8, p_cmap_g[ j ] >>8,
p_cmap_b[ j ] >>8);
#endif
/* Allocate color */
p_lookup[ i ] = 1;
p_rgb8[ i++ ] = j;
j++;
}
else
{
p_lookup[ i ] = 0;
p_rgb8[ i++ ] = 0;
}
}
}
}
/* The colors have been allocated, we can set the palette */
/* FIXME FIXME FIXME FIXME FIXME FIXME FIXME FIXME FIXME
p_filter->fmt_out.video.pf_setpalette( p_filter, p_cmap_r, p_cmap_g, p_cmap_b );*/
#if 0
/* There will eventually be a way to know which colors
* couldn't be allocated and try to find a replacement */
p_vout->i_white_pixel = 0xff;
p_vout->i_black_pixel = 0x00;
p_vout->i_gray_pixel = 0x44;
p_vout->i_blue_pixel = 0x3b;
#endif
/* This loop allocates colors that got outside the RGB cube */
for ( i = 0, y = 0; y <= 256; y += 16, i += 128 - 81 )
{
for ( u = 0; u <= 256; u += 32 )
{
for ( v = 0; v <= 256; v += 32, i++ )
{
int u2, v2, dist, mindist = 100000000;
if( p_lookup[ i ] || y == 0 )
{
continue;
}
/* Heavy. yeah. */
for( u2 = 0; u2 <= 256; u2 += 32 )
{
for( v2 = 0; v2 <= 256; v2 += 32 )
{
j = ((y>>4)<<7) + (u2>>5)*9 + (v2>>5);
dist = (u-u2)*(u-u2) + (v-v2)*(v-v2);
/* Find the nearest color */
if( p_lookup[ j ] && dist < mindist )
{
p_rgb8[ i ] = p_rgb8[ j ];
mindist = dist;
}
j -= 128;
/* Find the nearest color */
if( p_lookup[ j ] && dist + 128 < mindist )
{
p_rgb8[ i ] = p_rgb8[ j ];
mindist = dist + 128;
}
}
}
}
}
}
}
#endif