video_yuv.c 14.8 KB
Newer Older
1
/*****************************************************************************
Sam Hocevar's avatar
Sam Hocevar committed
2
 * video_yuv.c: MMX YUV transformation functions
3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 31 32 33 34 35 36 37 38 39 40 41 42 43 44 45 46 47 48 49 50 51 52 53
 * Provides functions to perform the YUV conversion. The functions provided here
 * are a complete and portable C implementation, and may be replaced in certain
 * case by optimized functions.
 *****************************************************************************
 * Copyright (C) 1999, 2000 VideoLAN
 *
 * Authors:
 *
 * 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 02111-1307, USA.
 *****************************************************************************/

/*****************************************************************************
 * Preamble
 *****************************************************************************/
#include "defs.h"

#include <math.h>                                            /* exp(), pow() */
#include <errno.h>                                                 /* ENOMEM */
#include <stdlib.h>                                                /* free() */
#include <string.h>                                            /* strerror() */

#include "config.h"
#include "common.h"
#include "threads.h"
#include "mtime.h"
#include "plugins.h"
#include "video.h"
#include "video_output.h"
#include "video_yuv.h"

#include "intf_msg.h"

/*****************************************************************************
 * vout_InitYUV: allocate and initialize translations tables
 *****************************************************************************
 * This function will allocate memory to store translation tables, depending
 * of the screen depth.
 *****************************************************************************/
Sam Hocevar's avatar
Sam Hocevar committed
54
int yuv_MMXInit( vout_thread_t *p_vout )
55 56 57
{
    size_t      tables_size;                        /* tables size, in bytes */

Sam Hocevar's avatar
Sam Hocevar committed
58 59
    /* Computes tables size for 8bbp only */
    if( p_vout->i_bytes_per_pixel == 1 )
60 61 62 63
    {
        tables_size = sizeof( u8 )
                * (p_vout->b_grayscale ? GRAY_TABLE_SIZE : PALETTE_TABLE_SIZE);

Sam Hocevar's avatar
Sam Hocevar committed
64 65 66 67 68 69 70 71 72
        /* Allocate memory */
        p_vout->yuv.p_base = malloc( tables_size );
        if( p_vout->yuv.p_base == NULL )
        {
            intf_ErrMsg("error: %s\n", strerror(ENOMEM));
            return( 1 );
        }
    }
    else
73
    {
Sam Hocevar's avatar
Sam Hocevar committed
74
        p_vout->yuv.p_base = NULL;
75 76 77 78 79 80 81 82 83 84 85 86 87 88 89 90 91 92 93 94 95 96 97 98 99
    }

    /* Allocate memory for conversion buffer and offset array */
    p_vout->yuv.p_buffer = malloc( VOUT_MAX_WIDTH * p_vout->i_bytes_per_pixel );
    if( p_vout->yuv.p_buffer == NULL )
    {
        intf_ErrMsg("error: %s\n", strerror(ENOMEM));
        free( p_vout->yuv.p_base );
        return( 1 );
    }
    p_vout->yuv.p_offset = malloc( p_vout->i_width * sizeof( int ) );
    if( p_vout->yuv.p_offset == NULL )
    {
        intf_ErrMsg("error: %s\n", strerror(ENOMEM));
        free( p_vout->yuv.p_base );
        free( p_vout->yuv.p_buffer );
        return( 1 );
    }

    /* Initialize tables */
    SetYUV( p_vout );
    return( 0 );
}

/*****************************************************************************
Sam Hocevar's avatar
Sam Hocevar committed
100
 * yuv_MMXEnd: destroy translations tables
101
 *****************************************************************************
Sam Hocevar's avatar
Sam Hocevar committed
102
 * Free memory allocated by yuv_MMXCreate.
103
 *****************************************************************************/
Sam Hocevar's avatar
Sam Hocevar committed
104
void yuv_MMXEnd( vout_thread_t *p_vout )
105
{
Sam Hocevar's avatar
Sam Hocevar committed
106 107 108 109 110
    if( p_vout->i_bytes_per_pixel == 1 )
    {
        free( p_vout->yuv.p_base );
    }

Sam Hocevar's avatar
Sam Hocevar committed
111 112
    free( p_vout->yuv.p_buffer );
    free( p_vout->yuv.p_offset );
113 114 115
}

/*****************************************************************************
Sam Hocevar's avatar
Sam Hocevar committed
116
 * yuv_MMXReset: re-initialize translations tables
117
 *****************************************************************************
Sam Hocevar's avatar
Sam Hocevar committed
118 119
 * This function will initialize the tables allocated by vout_CreateTables and
 * set functions pointers.
120
 *****************************************************************************/
Sam Hocevar's avatar
Sam Hocevar committed
121
int yuv_MMXReset( vout_thread_t *p_vout )
122
{
Sam Hocevar's avatar
Sam Hocevar committed
123 124
    yuv_MMXEnd( p_vout );
    return( yuv_MMXInit( p_vout ) );
125 126 127 128 129 130 131 132 133 134 135 136 137 138 139 140 141
}

/* following functions are local */

/*****************************************************************************
 * SetYUV: compute tables and set function pointers
+ *****************************************************************************/
void SetYUV( vout_thread_t *p_vout )
{
    int         i_index;                                  /* index in tables */

    /*
     * Set pointers and build YUV tables
     */
    if( p_vout->b_grayscale )
    {
        /* Grayscale: build gray table */
Sam Hocevar's avatar
Sam Hocevar committed
142
        if( p_vout->i_bytes_per_pixel == 1 )
143
        {
Sam Hocevar's avatar
Sam Hocevar committed
144
            u16 bright[256], transp[256];
145 146 147

            for( i_index = 0; i_index < 256; i_index++)
            {
Sam Hocevar's avatar
Sam Hocevar committed
148 149
                bright[ i_index ] = i_index << 8;
                transp[ i_index ] = 0;
150
            }
Sam Hocevar's avatar
Sam Hocevar committed
151 152 153 154 155 156 157
            /* the colors have been allocated, we can set the palette */
            p_vout->p_set_palette( p_vout, bright, bright, bright, transp );
            p_vout->i_white_pixel = 0xff;
            p_vout->i_black_pixel = 0x00;
            p_vout->i_gray_pixel = 0x44;
            p_vout->i_blue_pixel = 0x3b;
        }
158 159 160 161
    }
    else
    {
        /* Color: build red, green and blue tables */
Sam Hocevar's avatar
Sam Hocevar committed
162
        if( p_vout->i_bytes_per_pixel == 1 )
163
        {
Sam Hocevar's avatar
Sam Hocevar committed
164 165 166 167 168 169 170 171 172 173 174 175 176 177 178 179 180 181 182 183 184
            #define RGB_MIN 0
            #define RGB_MAX 255
            #define CLIP( x ) ( ((x < 0) ? 0 : (x > 255) ? 255 : x) << 8 )
            #define SHIFT 20
            #define U_GREEN_COEF    ((int)(-0.391 * (1<<SHIFT) / 1.164))
            #define U_BLUE_COEF     ((int)(2.018 * (1<<SHIFT) / 1.164))
            #define V_RED_COEF      ((int)(1.596 * (1<<SHIFT) / 1.164))
            #define V_GREEN_COEF    ((int)(-0.813 * (1<<SHIFT) / 1.164))

            int y,u,v;
            int r,g,b;
            int uvr, uvg, uvb;
            int i = 0, j = 0;
            u16 red[256], green[256], blue[256], transp[256];
            unsigned char lookup[PALETTE_TABLE_SIZE];

            p_vout->yuv.yuv.p_rgb8 = (u8 *)p_vout->yuv.p_base;

            /* this loop calculates the intersection of an YUV box
             * and the RGB cube. */
            for ( y = 0; y <= 256; y += 16 )
185
            {
Sam Hocevar's avatar
Sam Hocevar committed
186 187
                for ( u = 0; u <= 256; u += 32 )
                for ( v = 0; v <= 256; v += 32 )
188
                {
Sam Hocevar's avatar
Sam Hocevar committed
189 190 191 192 193 194 195 196 197
                    uvr = (V_RED_COEF*(v-128)) >> SHIFT;
                    uvg = (U_GREEN_COEF*(u-128) + V_GREEN_COEF*(v-128)) >> SHIFT;
                    uvb = (U_BLUE_COEF*(u-128)) >> SHIFT;
                    r = y + uvr;
                    g = y + uvg;
                    b = y + uvb;

                    if( r >= RGB_MIN && g >= RGB_MIN && b >= RGB_MIN
                            && r <= RGB_MAX && g <= RGB_MAX && b <= RGB_MAX )
198
                    {
Sam Hocevar's avatar
Sam Hocevar committed
199 200 201 202 203 204 205 206 207 208 209 210 211 212 213 214 215 216
                        /* this one should never happen unless someone fscked up my code */
                        if(j == 256) { intf_ErrMsg( "vout error: no colors left to build palette\n" ); break; }

                        /* clip the colors */
                        red[j] = CLIP( r );
                        green[j] = CLIP( g );
                        blue[j] = CLIP( b );
                        transp[j] = 0;

                        /* allocate color */
                        lookup[i] = 1;
                        p_vout->yuv.yuv.p_rgb8[i++] = j;
                        j++;
                    }
                    else
                    {
                        lookup[i] = 0;
                        p_vout->yuv.yuv.p_rgb8[i++] = 0;
217 218
                    }
                }
Sam Hocevar's avatar
Sam Hocevar committed
219 220
                i += 128-81;
            }
221

Sam Hocevar's avatar
Sam Hocevar committed
222 223 224 225
            /* the colors have been allocated, we can set the palette */
            /* there will eventually be a way to know which colors
             * couldn't be allocated and try to find a replacement */
            p_vout->p_set_palette( p_vout, red, green, blue, transp );
226

Sam Hocevar's avatar
Sam Hocevar committed
227 228 229 230
            p_vout->i_white_pixel = 0xff;
            p_vout->i_black_pixel = 0x00;
            p_vout->i_gray_pixel = 0x44;
            p_vout->i_blue_pixel = 0x3b;
231

Sam Hocevar's avatar
Sam Hocevar committed
232 233 234 235 236 237
            i = 0;
            /* this loop allocates colors that got outside
             * the RGB cube */
            for ( y = 0; y <= 256; y += 16 )
            {
                for ( u = 0; u <= 256; u += 32 )
238 239 240 241 242 243 244 245 246 247 248 249 250 251 252 253 254 255 256 257 258 259 260 261 262 263 264 265 266 267 268 269 270 271 272 273 274
                {
                    for ( v = 0; v <= 256; v += 32 )
                    {
                        int u2, v2;
                        int dist, mindist = 100000000;

                        if( lookup[i] || y==0)
                        {
                            i++;
                            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);
                            if( lookup[j] )
                            /* find the nearest color */
                            if( dist < mindist )
                            {
                                p_vout->yuv.yuv.p_rgb8[i] = p_vout->yuv.yuv.p_rgb8[j];
                                mindist = dist;
                            }
                            j -= 128;
                            if( lookup[j] )
                            /* find the nearest color */
                            if( dist + 128 < mindist )
                            {
                                p_vout->yuv.yuv.p_rgb8[i] = p_vout->yuv.yuv.p_rgb8[j];
                                mindist = dist + 128;
                            }
                        }
                        i++;
                    }
                }
Sam Hocevar's avatar
Sam Hocevar committed
275
                i += 128-81;
276 277 278 279 280 281 282 283 284 285 286 287 288 289 290 291 292 293 294 295 296 297 298 299 300 301 302 303 304 305 306 307 308 309 310 311 312 313 314 315 316 317 318 319 320 321 322 323 324 325 326 327 328 329 330 331 332 333 334 335 336 337 338 339 340 341 342 343 344 345
            }
        }
    }

    /*
     * Set functions pointers
     */
    if( p_vout->b_grayscale )
    {
        /* Grayscale */
        switch( p_vout->i_bytes_per_pixel )
        {
        case 1:
            p_vout->yuv.p_Convert420 = (vout_yuv_convert_t *) ConvertY4Gray8;
            p_vout->yuv.p_Convert422 = (vout_yuv_convert_t *) ConvertY4Gray8;
            p_vout->yuv.p_Convert444 = (vout_yuv_convert_t *) ConvertY4Gray8;
            break;
        case 2:
            p_vout->yuv.p_Convert420 = (vout_yuv_convert_t *) ConvertY4Gray16;
            p_vout->yuv.p_Convert422 = (vout_yuv_convert_t *) ConvertY4Gray16;
            p_vout->yuv.p_Convert444 = (vout_yuv_convert_t *) ConvertY4Gray16;
            break;
        case 3:
            p_vout->yuv.p_Convert420 = (vout_yuv_convert_t *) ConvertY4Gray24;
            p_vout->yuv.p_Convert422 = (vout_yuv_convert_t *) ConvertY4Gray24;
            p_vout->yuv.p_Convert444 = (vout_yuv_convert_t *) ConvertY4Gray24;
            break;
        case 4:
            p_vout->yuv.p_Convert420 = (vout_yuv_convert_t *) ConvertY4Gray32;
            p_vout->yuv.p_Convert422 = (vout_yuv_convert_t *) ConvertY4Gray32;
            p_vout->yuv.p_Convert444 = (vout_yuv_convert_t *) ConvertY4Gray32;
            break;
        }
    }
    else
    {
        /* Color */
        switch( p_vout->i_bytes_per_pixel )
        {
        case 1:
            p_vout->yuv.p_Convert420 = (vout_yuv_convert_t *) ConvertYUV420RGB8;
            p_vout->yuv.p_Convert422 = (vout_yuv_convert_t *) ConvertYUV422RGB8;
            p_vout->yuv.p_Convert444 = (vout_yuv_convert_t *) ConvertYUV444RGB8;
            break;
        case 2:
            p_vout->yuv.p_Convert420 =   (vout_yuv_convert_t *) ConvertYUV420RGB16;
            p_vout->yuv.p_Convert422 =   (vout_yuv_convert_t *) ConvertYUV422RGB16;
            p_vout->yuv.p_Convert444 =   (vout_yuv_convert_t *) ConvertYUV444RGB16;
            break;
        case 3:
            p_vout->yuv.p_Convert420 =   (vout_yuv_convert_t *) ConvertYUV420RGB24;
            p_vout->yuv.p_Convert422 =   (vout_yuv_convert_t *) ConvertYUV422RGB24;
            p_vout->yuv.p_Convert444 =   (vout_yuv_convert_t *) ConvertYUV444RGB24;
            break;
        case 4:
            p_vout->yuv.p_Convert420 =   (vout_yuv_convert_t *) ConvertYUV420RGB32;
            p_vout->yuv.p_Convert422 =   (vout_yuv_convert_t *) ConvertYUV422RGB32;
            p_vout->yuv.p_Convert444 =   (vout_yuv_convert_t *) ConvertYUV444RGB32;
            break;
        }
    }
}

/*****************************************************************************
 * SetOffset: build offset array for conversion functions
 *****************************************************************************
 * This function will build an offset array used in later conversion functions.
 * It will also set horizontal and vertical scaling indicators.
 *****************************************************************************/
void SetOffset( int i_width, int i_height, int i_pic_width, int i_pic_height,
346 347
                boolean_t *pb_h_scaling, int *pi_v_scaling, int *p_offset,
                boolean_t b_double )
348 349 350 351 352 353 354
{
    int i_x;                                    /* x position in destination */
    int i_scale_count;                                     /* modulo counter */

    /*
     * Prepare horizontal offset array
     */
Sam Hocevar's avatar
Sam Hocevar committed
355 356 357 358 359 360
    if( i_pic_width - i_width == 0 )
    {
        /* No horizontal scaling: YUV conversion is done directly to picture */
        *pb_h_scaling = 0;
    }
    else if( i_pic_width - i_width > 0 )
361 362 363
    {
        /* Prepare scaling array for horizontal extension */
        *pb_h_scaling =  1;
Sam Hocevar's avatar
Sam Hocevar committed
364
        i_scale_count =  i_pic_width;
365 366 367 368 369 370 371 372 373 374
        for( i_x = i_width; i_x--; )
        {
            while( (i_scale_count -= i_width) > 0 )
            {
                *p_offset++ = 0;
            }
            *p_offset++ = 1;
            i_scale_count += i_pic_width;
        }
    }
Sam Hocevar's avatar
Sam Hocevar committed
375
    else /* if( i_pic_width - i_width < 0 ) */
376 377 378
    {
        /* Prepare scaling array for horizontal reduction */
        *pb_h_scaling =  1;
Sam Hocevar's avatar
Sam Hocevar committed
379
        i_scale_count =  i_width;
380 381 382
        for( i_x = i_pic_width; i_x--; )
        {
            *p_offset = 1;
Sam Hocevar's avatar
Sam Hocevar committed
383
            while( (i_scale_count -= i_pic_width) > 0 )
384 385 386 387 388 389 390 391 392 393 394
            {
                *p_offset += 1;
            }
            p_offset++;
            i_scale_count += i_width;
        }
    }

    /*
     * Set vertical scaling indicator
     */
Sam Hocevar's avatar
Sam Hocevar committed
395
    if( i_pic_height - i_height == 0 )
396
    {
Sam Hocevar's avatar
Sam Hocevar committed
397
        *pi_v_scaling = 0;
398
    }
Sam Hocevar's avatar
Sam Hocevar committed
399
    else if( i_pic_height - i_height > 0 )
400
    {
Sam Hocevar's avatar
Sam Hocevar committed
401
        *pi_v_scaling = 1;
402
    }
Sam Hocevar's avatar
Sam Hocevar committed
403
    else /* if( i_pic_height - i_height < 0 ) */
404
    {
Sam Hocevar's avatar
Sam Hocevar committed
405
        *pi_v_scaling = -1;
406 407 408
    }
}