i420_rgb16.c

VLC Player Source Code

/*****************************************************************************
 * i420_rgb16.c : YUV to bitmap RGB conversion module for vlc
 *****************************************************************************
 * Copyright (C) 2000 the VideoLAN team
 * $Id$
 *
 * Authors: Samuel Hocevar <[e-mail]>
 *          Damien Fouilleul <[e-mail]>
 *
 * 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 <vlc/vlc.h>
#include <vlc_filter.h>
#include <vlc_vout.h>

#include "i420_rgb.h"
#if defined (MODULE_NAME_IS_i420_rgb)
#   include "i420_rgb_c.h"
#elif defined (MODULE_NAME_IS_i420_rgb_mmx)
#   include "i420_rgb_mmx.h"
#elif defined (MODULE_NAME_IS_i420_rgb_sse2)
#   include "i420_rgb_mmx.h"
#endif

static void SetOffset( int, int, int, int, bool *,
                       unsigned int *, int * );

#if defined (MODULE_NAME_IS_i420_rgb)
/*****************************************************************************
 * I420_RGB16: color YUV 4:2:0 to RGB 16 bpp with dithering
 *****************************************************************************
 * Horizontal alignment needed:
 *  - input: 8 pixels (8 Y bytes, 4 U/V bytes), margins not allowed
 *  - output: 1 pixel (2 bytes), margins allowed
 * Vertical alignment needed:
 *  - input: 2 lines (2 Y lines, 1 U/V line)
 *  - output: 1 line
 *****************************************************************************/
void I420_RGB16_dither( filter_t *p_filter, picture_t *p_src,
                                                picture_t *p_dest )
{
    /* We got this one from the old arguments */
    uint16_t *p_pic = (uint16_t*)p_dest->p->p_pixels;
    uint8_t  *p_y   = p_src->Y_PIXELS;
    uint8_t  *p_u   = p_src->U_PIXELS;
    uint8_t  *p_v   = p_src->V_PIXELS;

    bool   b_hscale;                        /* horizontal scaling type */
    unsigned int i_vscale;                          /* vertical scaling type */
    unsigned int i_x, i_y;                /* horizontal and vertical indexes */
    unsigned int i_real_y;                                          /* y % 4 */

    int         i_right_margin;
    int         i_rewind;
    int         i_scale_count;                       /* scale modulo counter */
    int         i_chroma_width = p_filter->fmt_in.video.i_width / 2; /* chroma width */
    uint16_t *  p_pic_start;       /* beginning of the current line for copy */
    int         i_uval, i_vval;                           /* U and V samples */
    int         i_red, i_green, i_blue;          /* U and V modified samples */
    uint16_t *  p_yuv = p_filter->p_sys->p_rgb16;
    uint16_t *  p_ybase;                     /* Y dependant conversion table */

    /* Conversion buffer pointer */
    uint16_t *  p_buffer_start = (uint16_t*)p_filter->p_sys->p_buffer;
    uint16_t *  p_buffer;

    /* Offset array pointer */
    int *       p_offset_start = p_filter->p_sys->p_offset;
    int *       p_offset;

    const int i_source_margin = p_src->p[0].i_pitch
                                 - p_src->p[0].i_visible_pitch;
    const int i_source_margin_c = p_src->p[1].i_pitch
                                 - p_src->p[1].i_visible_pitch;

    /* The dithering matrices */
    int dither10[4] = {  0x0,  0x8,  0x2,  0xa };
    int dither11[4] = {  0xc,  0x4,  0xe,  0x6 };
    int dither12[4] = {  0x3,  0xb,  0x1,  0x9 };
    int dither13[4] = {  0xf,  0x7,  0xd,  0x5 };

    for(i_x = 0; i_x < 4; i_x++)
    {
        dither10[i_x] = dither10[i_x] << (SHIFT - 4 + p_filter->fmt_out.video.i_rrshift);
        dither11[i_x] = dither11[i_x] << (SHIFT - 4 + p_filter->fmt_out.video.i_rrshift);
        dither12[i_x] = dither12[i_x] << (SHIFT - 4 + p_filter->fmt_out.video.i_rrshift);
        dither13[i_x] = dither13[i_x] << (SHIFT - 4 + p_filter->fmt_out.video.i_rrshift);
    }

    i_right_margin = p_dest->p->i_pitch - p_dest->p->i_visible_pitch;

    if( p_filter->fmt_in.video.i_width & 7 )
    {
        i_rewind = 8 - ( p_filter->fmt_in.video.i_width & 7 );
    }
    else
    {
        i_rewind = 0;
    }

    /* Rule: when a picture of size (x1,y1) with aspect ratio r1 is rendered
     * on a picture of size (x2,y2) with aspect ratio r2, if x1 grows to x1'
     * then y1 grows to y1' = x1' * y2/x2 * r2/r1 */
    SetOffset( p_filter->fmt_in.video.i_width,
               p_filter->fmt_in.video.i_height,
               p_filter->fmt_out.video.i_width,
               p_filter->fmt_out.video.i_height,
               &b_hscale, &i_vscale, p_offset_start );

    /*
     * Perform conversion
     */
    i_scale_count = ( i_vscale == 1 ) ?
                    p_filter->fmt_out.video.i_height :
                    p_filter->fmt_in.video.i_height;
    for( i_y = 0; i_y < p_filter->fmt_in.video.i_height; i_y++ )
    {
        i_real_y = i_y & 0x3;
        p_pic_start = p_pic;
        p_buffer = b_hscale ? p_buffer_start : p_pic;

        for ( i_x = p_filter->fmt_in.video.i_width / 8; i_x--; )
        {
            int *p_dither = dither10;
            CONVERT_YUV_PIXEL_DITHER(2);
            p_dither = dither11;
            CONVERT_Y_PIXEL_DITHER(2);
            p_dither = dither12;
            CONVERT_YUV_PIXEL_DITHER(2);
            p_dither = dither13;
            CONVERT_Y_PIXEL_DITHER(2);
            p_dither = dither10;
            CONVERT_YUV_PIXEL_DITHER(2);
            p_dither = dither11;
            CONVERT_Y_PIXEL_DITHER(2);
            p_dither = dither12;
            CONVERT_YUV_PIXEL_DITHER(2);
            p_dither = dither13;
            CONVERT_Y_PIXEL_DITHER(2);
        }

        /* Here we do some unaligned reads and duplicate conversions, but
         * at least we have all the pixels */
        if( i_rewind )
        {
            int *p_dither = dither10;
            p_y -= i_rewind;
            p_u -= i_rewind >> 1;
            p_v -= i_rewind >> 1;
            p_buffer -= i_rewind;
            CONVERT_YUV_PIXEL_DITHER(2);
            p_dither = dither11;
            CONVERT_Y_PIXEL_DITHER(2);
            p_dither = dither12;
            CONVERT_YUV_PIXEL_DITHER(2);
            p_dither = dither13;
            CONVERT_Y_PIXEL_DITHER(2);
            p_dither = dither10;
            CONVERT_YUV_PIXEL_DITHER(2);
            p_dither = dither11;
            CONVERT_Y_PIXEL_DITHER(2);
            p_dither = dither12;
            CONVERT_YUV_PIXEL_DITHER(2);
            p_dither = dither13;
            CONVERT_Y_PIXEL_DITHER(2);
        }
        SCALE_WIDTH;
        SCALE_HEIGHT( 420, 2 );

        p_y += i_source_margin;
        if( i_y % 2 )
        {
            p_u += i_source_margin_c;
            p_v += i_source_margin_c;
        }
    }
}
#endif

/*****************************************************************************
 * I420_RGB16: color YUV 4:2:0 to RGB 16 bpp
 *****************************************************************************
 * Horizontal alignment needed:
 *  - input: 8 pixels (8 Y bytes, 4 U/V bytes), margins not allowed
 *  - output: 1 pixel (2 bytes), margins allowed
 * Vertical alignment needed:
 *  - input: 2 lines (2 Y lines, 1 U/V line)
 *  - output: 1 line
 *****************************************************************************/

#if defined (MODULE_NAME_IS_i420_rgb)

void I420_RGB16( filter_t *p_filter, picture_t *p_src,
                                         picture_t *p_dest )
{
    /* We got this one from the old arguments */
    uint16_t *p_pic = (uint16_t*)p_dest->p->p_pixels;
    uint8_t  *p_y   = p_src->Y_PIXELS;
    uint8_t  *p_u   = p_src->U_PIXELS;
    uint8_t  *p_v   = p_src->V_PIXELS;

    bool  b_hscale;                         /* horizontal scaling type */
    unsigned int i_vscale;                          /* vertical scaling type */
    unsigned int i_x, i_y;                /* horizontal and vertical indexes */

    int         i_right_margin;
    int         i_rewind;
    int         i_scale_count;                       /* scale modulo counter */
    int         i_chroma_width = p_filter->fmt_in.video.i_width / 2; /* chroma width */
    uint16_t *  p_pic_start;       /* beginning of the current line for copy */
    int         i_uval, i_vval;                           /* U and V samples */
    int         i_red, i_green, i_blue;          /* U and V modified samples */
    uint16_t *  p_yuv = p_filter->p_sys->p_rgb16;
    uint16_t *  p_ybase;                     /* Y dependant conversion table */

    /* Conversion buffer pointer */
    uint16_t *  p_buffer_start = (uint16_t*)p_filter->p_sys->p_buffer;
    uint16_t *  p_buffer;

    /* Offset array pointer */
    int *       p_offset_start = p_filter->p_sys->p_offset;
    int *       p_offset;

    const int i_source_margin = p_src->p[0].i_pitch
                                 - p_src->p[0].i_visible_pitch;
    const int i_source_margin_c = p_src->p[1].i_pitch
                                 - p_src->p[1].i_visible_pitch;

    i_right_margin = p_dest->p->i_pitch - p_dest->p->i_visible_pitch;

    if( p_filter->fmt_in.video.i_width & 7 )
    {
        i_rewind = 8 - ( p_filter->fmt_in.video.i_width & 7 );
    }
    else
    {
        i_rewind = 0;
    }

    /* Rule: when a picture of size (x1,y1) with aspect ratio r1 is rendered
     * on a picture of size (x2,y2) with aspect ratio r2, if x1 grows to x1'
     * then y1 grows to y1' = x1' * y2/x2 * r2/r1 */
    SetOffset( p_filter->fmt_in.video.i_width,
               p_filter->fmt_in.video.i_height,
               p_filter->fmt_out.video.i_width,
               p_filter->fmt_out.video.i_height,
               &b_hscale, &i_vscale, p_offset_start );

    /*
     * Perform conversion
     */
    i_scale_count = ( i_vscale == 1 ) ?
                    p_filter->fmt_out.video.i_height :
                    p_filter->fmt_in.video.i_height;
    for( i_y = 0; i_y < p_filter->fmt_in.video.i_height; i_y++ )
    {
        p_pic_start = p_pic;
        p_buffer = b_hscale ? p_buffer_start : p_pic;

        for ( i_x = p_filter->fmt_in.video.i_width / 8; i_x--; )
        {
            CONVERT_YUV_PIXEL(2);  CONVERT_Y_PIXEL(2);
            CONVERT_YUV_PIXEL(2);  CONVERT_Y_PIXEL(2);
            CONVERT_YUV_PIXEL(2);  CONVERT_Y_PIXEL(2);
            CONVERT_YUV_PIXEL(2);  CONVERT_Y_PIXEL(2);
        }

        /* Here we do some unaligned reads and duplicate conversions, but
         * at least we have all the pixels */
        if( i_rewind )
        {
            p_y -= i_rewind;
            p_u -= i_rewind >> 1;
            p_v -= i_rewind >> 1;
            p_buffer -= i_rewind;

            CONVERT_YUV_PIXEL(2);  CONVERT_Y_PIXEL(2);
            CONVERT_YUV_PIXEL(2);  CONVERT_Y_PIXEL(2);
            CONVERT_YUV_PIXEL(2);  CONVERT_Y_PIXEL(2);
            CONVERT_YUV_PIXEL(2);  CONVERT_Y_PIXEL(2);
        }
        SCALE_WIDTH;
        SCALE_HEIGHT( 420, 2 );

        p_y += i_source_margin;
        if( i_y % 2 )
        {
            p_u += i_source_margin_c;
            p_v += i_source_margin_c;
        }
    }
}

#else // ! defined (MODULE_NAME_IS_i420_rgb)

void I420_R5G5B5( filter_t *p_filter, picture_t *p_src,
                                          picture_t *p_dest )
{
    /* We got this one from the old arguments */
    uint16_t *p_pic = (uint16_t*)p_dest->p->p_pixels;
    uint8_t  *p_y   = p_src->Y_PIXELS;
    uint8_t  *p_u   = p_src->U_PIXELS;
    uint8_t  *p_v   = p_src->V_PIXELS;

    bool  b_hscale;                         /* horizontal scaling type */
    unsigned int i_vscale;                          /* vertical scaling type */
    unsigned int i_x, i_y;                /* horizontal and vertical indexes */

    int         i_right_margin;
    int         i_rewind;
    int         i_scale_count;                       /* scale modulo counter */
    int         i_chroma_width = p_filter->fmt_in.video.i_width / 2; /* chroma width */
    uint16_t *  p_pic_start;       /* beginning of the current line for copy */

    /* Conversion buffer pointer */
    uint16_t *  p_buffer_start = (uint16_t*)p_filter->p_sys->p_buffer;
    uint16_t *  p_buffer;

    /* Offset array pointer */
    int *       p_offset_start = p_filter->p_sys->p_offset;
    int *       p_offset;

    const int i_source_margin = p_src->p[0].i_pitch
                                 - p_src->p[0].i_visible_pitch;
    const int i_source_margin_c = p_src->p[1].i_pitch
                                 - p_src->p[1].i_visible_pitch;

    i_right_margin = p_dest->p->i_pitch - p_dest->p->i_visible_pitch;

    /* Rule: when a picture of size (x1,y1) with aspect ratio r1 is rendered
     * on a picture of size (x2,y2) with aspect ratio r2, if x1 grows to x1'
     * then y1 grows to y1' = x1' * y2/x2 * r2/r1 */
    SetOffset( p_filter->fmt_in.video.i_width,
               p_filter->fmt_in.video.i_height,
               p_filter->fmt_out.video.i_width,
               p_filter->fmt_out.video.i_height,
               &b_hscale, &i_vscale, p_offset_start );


    /*
     * Perform conversion
     */
    i_scale_count = ( i_vscale == 1 ) ?
                    p_filter->fmt_out.video.i_height :
                    p_filter->fmt_in.video.i_height;

#if defined (MODULE_NAME_IS_i420_rgb_sse2)

    if( p_filter->fmt_in.video.i_width & 15 )
    {
        i_rewind = 16 - ( p_filter->fmt_in.video.i_width & 15 );
    }
    else
    {
        i_rewind = 0;
    }

    /*
    ** SSE2 128 bits fetch/store instructions are faster
    ** if memory access is 16 bytes aligned
    */

    p_buffer = b_hscale ? p_buffer_start : p_pic;
    if( 0 == (15 & (p_src->p[Y_PLANE].i_pitch|
                    p_dest->p->i_pitch|
                    ((intptr_t)p_y)|
                    ((intptr_t)p_buffer))) )
    {
        /* use faster SSE2 aligned fetch and store */
        for( i_y = 0; i_y < p_filter->fmt_in.video.i_height; i_y++ )
        {