1 /*****************************************************************************
2 * video_yuvmmx.c: MMX YUV transformation functions
3 * Provides functions to perform the YUV conversion.
4 *****************************************************************************
5 * Copyright (C) 1999, 2000 VideoLAN
9 * This program is free software; you can redistribute it and/or modify
10 * it under the terms of the GNU General Public License as published by
11 * the Free Software Foundation; either version 2 of the License, or
12 * (at your option) any later version.
14 * This program is distributed in the hope that it will be useful,
15 * but WITHOUT ANY WARRANTY; without even the implied warranty of
16 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
17 * General Public License for more details.
19 * You should have received a copy of the GNU General Public
20 * License along with this program; if not, write to the
21 * Free Software Foundation, Inc., 59 Temple Place - Suite 330,
22 * Boston, MA 02111-1307, USA.
23 *****************************************************************************/
25 /*****************************************************************************
27 *****************************************************************************/
30 #include <math.h> /* exp(), pow() */
31 #include <errno.h> /* ENOMEM */
32 #include <stdlib.h> /* free() */
33 #include <string.h> /* strerror() */
44 #include "video_output.h"
46 #include "video_common.h"
50 static int yuv_Probe ( probedata_t *p_data );
51 static int yuv_Init ( vout_thread_t *p_vout );
52 static int yuv_Reset ( vout_thread_t *p_vout );
53 static void yuv_End ( vout_thread_t *p_vout );
55 static void SetYUV ( vout_thread_t *p_vout );
57 /*****************************************************************************
58 * Functions exported as capabilities. They are declared as static so that
59 * we don't pollute the namespace too much.
60 *****************************************************************************/
61 void yuv_getfunctions( function_list_t * p_function_list )
63 p_function_list->pf_probe = yuv_Probe;
64 p_function_list->functions.yuv.pf_init = yuv_Init;
65 p_function_list->functions.yuv.pf_reset = yuv_Reset;
66 p_function_list->functions.yuv.pf_end = yuv_End;
69 /*****************************************************************************
70 * yuv_Probe: tests probe the audio device and return a score
71 *****************************************************************************
72 * This function tries to open the DSP and returns a score to the plugin
73 * manager so that it can choose the most appropriate one.
74 *****************************************************************************/
75 static int yuv_Probe( probedata_t *p_data )
77 /* Test for MMX support in the CPU */
78 if( TestCPU() & CPU_CAPABILITY_MMX )
80 if( TestMethod( YUV_METHOD_VAR, "yuvmmx" ) )
95 /*****************************************************************************
96 * yuv_Init: allocate and initialize translations tables
97 *****************************************************************************
98 * This function will allocate memory to store translation tables, depending
99 * of the screen depth.
100 *****************************************************************************/
101 static int yuv_Init( vout_thread_t *p_vout )
103 size_t tables_size; /* tables size, in bytes */
105 /* Computes tables size for 8bbp only */
106 if( p_vout->i_bytes_per_pixel == 1 )
108 tables_size = sizeof( u8 )
109 * (p_vout->b_grayscale ? GRAY_TABLE_SIZE : PALETTE_TABLE_SIZE);
111 /* Allocate memory */
112 p_vout->yuv.p_base = malloc( tables_size );
113 if( p_vout->yuv.p_base == NULL )
115 intf_ErrMsg("error: %s", strerror(ENOMEM));
121 p_vout->yuv.p_base = NULL;
124 /* Allocate memory for conversion buffer and offset array */
125 p_vout->yuv.p_buffer = malloc( VOUT_MAX_WIDTH * p_vout->i_bytes_per_pixel );
126 if( p_vout->yuv.p_buffer == NULL )
128 intf_ErrMsg("error: %s", strerror(ENOMEM));
129 free( p_vout->yuv.p_base );
132 p_vout->yuv.p_offset = malloc( p_vout->i_width * sizeof( int ) );
133 if( p_vout->yuv.p_offset == NULL )
135 intf_ErrMsg("error: %s", strerror(ENOMEM));
136 free( p_vout->yuv.p_base );
137 free( p_vout->yuv.p_buffer );
141 /* Initialize tables */
146 /*****************************************************************************
147 * yuv_End: destroy translations tables
148 *****************************************************************************
149 * Free memory allocated by yuv_CCreate.
150 *****************************************************************************/
151 static void yuv_End( vout_thread_t *p_vout )
153 free( p_vout->yuv.p_base );
154 free( p_vout->yuv.p_buffer );
155 free( p_vout->yuv.p_offset );
158 /*****************************************************************************
159 * yuv_Reset: re-initialize translations tables
160 *****************************************************************************
161 * This function will initialize the tables allocated by vout_CreateTables and
162 * set functions pointers.
163 *****************************************************************************/
164 static int yuv_Reset( vout_thread_t *p_vout )
167 return( yuv_Init( p_vout ) );
170 /*****************************************************************************
171 * SetYUV: compute tables and set function pointers
172 *****************************************************************************/
173 static void SetYUV( vout_thread_t *p_vout )
175 int i_index; /* index in tables */
178 * Set pointers and build YUV tables
180 if( p_vout->b_grayscale )
182 /* Grayscale: build gray table */
183 if( p_vout->i_bytes_per_pixel == 1 )
185 u16 bright[256], transp[256];
187 for( i_index = 0; i_index < 256; i_index++)
189 bright[ i_index ] = i_index << 8;
190 transp[ i_index ] = 0;
192 /* the colors have been allocated, we can set the palette */
193 p_vout->p_set_palette( p_vout, bright, bright, bright, transp );
194 p_vout->i_white_pixel = 0xff;
195 p_vout->i_black_pixel = 0x00;
196 p_vout->i_gray_pixel = 0x44;
197 p_vout->i_blue_pixel = 0x3b;
202 /* Color: build red, green and blue tables */
203 if( p_vout->i_bytes_per_pixel == 1 )
207 #define CLIP( x ) ( ((x < 0) ? 0 : (x > 255) ? 255 : x) << 8 )
209 #define U_GREEN_COEF ((int)(-0.391 * (1<<SHIFT) / 1.164))
210 #define U_BLUE_COEF ((int)(2.018 * (1<<SHIFT) / 1.164))
211 #define V_RED_COEF ((int)(1.596 * (1<<SHIFT) / 1.164))
212 #define V_GREEN_COEF ((int)(-0.813 * (1<<SHIFT) / 1.164))
218 u16 red[256], green[256], blue[256], transp[256];
219 unsigned char lookup[PALETTE_TABLE_SIZE];
221 p_vout->yuv.yuv.p_rgb8 = (u8 *)p_vout->yuv.p_base;
223 /* this loop calculates the intersection of an YUV box
224 * and the RGB cube. */
225 for ( y = 0; y <= 256; y += 16 )
227 for ( u = 0; u <= 256; u += 32 )
228 for ( v = 0; v <= 256; v += 32 )
230 uvr = (V_RED_COEF*(v-128)) >> SHIFT;
231 uvg = (U_GREEN_COEF*(u-128) + V_GREEN_COEF*(v-128)) >> SHIFT;
232 uvb = (U_BLUE_COEF*(u-128)) >> SHIFT;
237 if( r >= RGB_MIN && g >= RGB_MIN && b >= RGB_MIN
238 && r <= RGB_MAX && g <= RGB_MAX && b <= RGB_MAX )
240 /* this one should never happen unless someone fscked up my code */
241 if(j == 256) { intf_ErrMsg( "vout error: no colors left to build palette" ); break; }
243 /* clip the colors */
245 green[j] = CLIP( g );
251 p_vout->yuv.yuv.p_rgb8[i++] = j;
257 p_vout->yuv.yuv.p_rgb8[i++] = 0;
263 /* the colors have been allocated, we can set the palette */
264 /* there will eventually be a way to know which colors
265 * couldn't be allocated and try to find a replacement */
266 p_vout->p_set_palette( p_vout, red, green, blue, transp );
268 p_vout->i_white_pixel = 0xff;
269 p_vout->i_black_pixel = 0x00;
270 p_vout->i_gray_pixel = 0x44;
271 p_vout->i_blue_pixel = 0x3b;
274 /* this loop allocates colors that got outside
276 for ( y = 0; y <= 256; y += 16 )
278 for ( u = 0; u <= 256; u += 32 )
280 for ( v = 0; v <= 256; v += 32 )
283 int dist, mindist = 100000000;
285 if( lookup[i] || y==0)
292 for( u2 = 0; u2 <= 256; u2 += 32 )
293 for( v2 = 0; v2 <= 256; v2 += 32 )
295 j = ((y>>4)<<7) + (u2>>5)*9 + (v2>>5);
296 dist = (u-u2)*(u-u2) + (v-v2)*(v-v2);
298 /* find the nearest color */
301 p_vout->yuv.yuv.p_rgb8[i] = p_vout->yuv.yuv.p_rgb8[j];
306 /* find the nearest color */
307 if( dist + 128 < mindist )
309 p_vout->yuv.yuv.p_rgb8[i] = p_vout->yuv.yuv.p_rgb8[j];
310 mindist = dist + 128;
322 * Set functions pointers
324 if( p_vout->b_grayscale )
327 switch( p_vout->i_bytes_per_pixel )
330 p_vout->yuv.p_Convert420 = (vout_yuv_convert_t *) ConvertY4Gray8;
331 p_vout->yuv.p_Convert422 = (vout_yuv_convert_t *) ConvertY4Gray8;
332 p_vout->yuv.p_Convert444 = (vout_yuv_convert_t *) ConvertY4Gray8;
335 p_vout->yuv.p_Convert420 = (vout_yuv_convert_t *) ConvertY4Gray16;
336 p_vout->yuv.p_Convert422 = (vout_yuv_convert_t *) ConvertY4Gray16;
337 p_vout->yuv.p_Convert444 = (vout_yuv_convert_t *) ConvertY4Gray16;
340 p_vout->yuv.p_Convert420 = (vout_yuv_convert_t *) ConvertYUV420RGB24;
341 p_vout->yuv.p_Convert422 = (vout_yuv_convert_t *) ConvertY4Gray24;
342 p_vout->yuv.p_Convert444 = (vout_yuv_convert_t *) ConvertY4Gray24;
345 p_vout->yuv.p_Convert420 = (vout_yuv_convert_t *) ConvertYUV420RGB32;
346 p_vout->yuv.p_Convert422 = (vout_yuv_convert_t *) ConvertY4Gray32;
347 p_vout->yuv.p_Convert444 = (vout_yuv_convert_t *) ConvertY4Gray32;
354 switch( p_vout->i_bytes_per_pixel )
357 p_vout->yuv.p_Convert420 = (vout_yuv_convert_t *) ConvertYUV420RGB8;
358 p_vout->yuv.p_Convert422 = (vout_yuv_convert_t *) ConvertYUV422RGB8;
359 p_vout->yuv.p_Convert444 = (vout_yuv_convert_t *) ConvertYUV444RGB8;
362 p_vout->yuv.p_Convert420 = (vout_yuv_convert_t *) ConvertYUV420RGB16;
363 p_vout->yuv.p_Convert422 = (vout_yuv_convert_t *) ConvertYUV422RGB16;
364 p_vout->yuv.p_Convert444 = (vout_yuv_convert_t *) ConvertYUV444RGB16;
367 p_vout->yuv.p_Convert420 = (vout_yuv_convert_t *) ConvertYUV420RGB24;
368 p_vout->yuv.p_Convert422 = (vout_yuv_convert_t *) ConvertYUV422RGB24;
369 p_vout->yuv.p_Convert444 = (vout_yuv_convert_t *) ConvertYUV444RGB24;
372 p_vout->yuv.p_Convert420 = (vout_yuv_convert_t *) ConvertYUV420RGB32;
373 p_vout->yuv.p_Convert422 = (vout_yuv_convert_t *) ConvertYUV422RGB32;
374 p_vout->yuv.p_Convert444 = (vout_yuv_convert_t *) ConvertYUV444RGB32;
380 /*****************************************************************************
381 * SetOffset: build offset array for conversion functions
382 *****************************************************************************
383 * This function will build an offset array used in later conversion functions.
384 * It will also set horizontal and vertical scaling indicators. If b_double
385 * is set, the p_offset structure has interleaved Y and U/V offsets.
386 *****************************************************************************/
387 void SetOffset( int i_width, int i_height, int i_pic_width, int i_pic_height,
388 boolean_t *pb_h_scaling, int *pi_v_scaling,
389 int *p_offset, boolean_t b_double )
391 int i_x; /* x position in destination */
392 int i_scale_count; /* modulo counter */
395 * Prepare horizontal offset array
397 if( i_pic_width - i_width == 0 )
399 /* No horizontal scaling: YUV conversion is done directly to picture */
402 else if( i_pic_width - i_width > 0 )
404 /* Prepare scaling array for horizontal extension */
406 i_scale_count = i_pic_width;
407 for( i_x = i_width; i_x--; )
409 while( (i_scale_count -= i_width) > 0 )
414 i_scale_count += i_pic_width;
417 else /* if( i_pic_width - i_width < 0 ) */
419 /* Prepare scaling array for horizontal reduction */
421 i_scale_count = i_width;
422 for( i_x = i_pic_width; i_x--; )
425 while( (i_scale_count -= i_pic_width) > 0 )
430 i_scale_count += i_width;
435 * Set vertical scaling indicator
437 if( i_pic_height - i_height == 0 )
441 else if( i_pic_height - i_height > 0 )
445 else /* if( i_pic_height - i_height < 0 ) */