1 /*****************************************************************************
2 * i420_rgb.c : YUV to bitmap RGB conversion module for vlc
3 *****************************************************************************
4 * Copyright (C) 2000, 2001, 2004 the VideoLAN team
7 * Author: Sam Hocevar <sam@zoy.org>
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
17 * GNU General Public License for more details.
19 * You should have received a copy of the GNU General Public License
20 * along with this program; if not, write to the Free Software
21 * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston MA 02110-1301, USA.
22 *****************************************************************************/
24 /*****************************************************************************
26 *****************************************************************************/
27 #include <math.h> /* exp(), pow() */
28 #include <string.h> /* strerror() */
29 #include <stdlib.h> /* malloc(), free() */
35 #if defined (MODULE_NAME_IS_i420_rgb)
36 # include "i420_rgb_c.h"
39 /*****************************************************************************
40 * RGB2PIXEL: assemble RGB components to a pixel value, returns a uint32_t
41 *****************************************************************************/
42 #define RGB2PIXEL( p_vout, i_r, i_g, i_b ) \
43 (((((uint32_t)i_r) >> p_vout->output.i_rrshift) \
44 << p_vout->output.i_lrshift) \
45 | ((((uint32_t)i_g) >> p_vout->output.i_rgshift) \
46 << p_vout->output.i_lgshift) \
47 | ((((uint32_t)i_b) >> p_vout->output.i_rbshift) \
48 << p_vout->output.i_lbshift))
50 /*****************************************************************************
51 * Local and extern prototypes.
52 *****************************************************************************/
53 static int Activate ( vlc_object_t * );
54 static void Deactivate ( vlc_object_t * );
56 #if defined (MODULE_NAME_IS_i420_rgb)
57 static void SetGammaTable ( int *pi_table, double f_gamma );
58 static void SetYUV ( vout_thread_t * );
59 static void Set8bppPalette ( vout_thread_t *, uint8_t * );
62 /*****************************************************************************
64 *****************************************************************************/
66 #if defined (MODULE_NAME_IS_i420_rgb)
67 set_description( _("I420,IYUV,YV12 to "
68 "RGB2,RV15,RV16,RV24,RV32 conversions") );
69 set_capability( "chroma", 80 );
70 #elif defined (MODULE_NAME_IS_i420_rgb_mmx)
71 set_description( _( "MMX I420,IYUV,YV12 to "
72 "RV15,RV16,RV24,RV32 conversions") );
73 set_capability( "chroma", 100 );
74 add_requirement( MMX );
76 set_callbacks( Activate, Deactivate );
79 /*****************************************************************************
80 * Activate: allocate a chroma function
81 *****************************************************************************
82 * This function allocates and initializes a chroma function
83 *****************************************************************************/
84 static int Activate( vlc_object_t *p_this )
86 vout_thread_t *p_vout = (vout_thread_t *)p_this;
87 #if defined (MODULE_NAME_IS_i420_rgb)
91 if( p_vout->render.i_width & 1 || p_vout->render.i_height & 1 )
96 switch( p_vout->render.i_chroma )
98 case VLC_FOURCC('Y','V','1','2'):
99 case VLC_FOURCC('I','4','2','0'):
100 case VLC_FOURCC('I','Y','U','V'):
101 switch( p_vout->output.i_chroma )
103 #if defined (MODULE_NAME_IS_i420_rgb)
104 case VLC_FOURCC('R','G','B','2'):
105 p_vout->chroma.pf_convert = E_(I420_RGB8);
108 case VLC_FOURCC('R','V','1','5'):
109 case VLC_FOURCC('R','V','1','6'):
110 #if defined (MODULE_NAME_IS_i420_rgb_mmx)
111 /* If we don't have support for the bitmasks, bail out */
112 if( ( p_vout->output.i_rmask != 0x7c00
113 || p_vout->output.i_gmask != 0x03e0
114 || p_vout->output.i_bmask != 0x001f )
115 && ( p_vout->output.i_rmask != 0xf800
116 || p_vout->output.i_gmask != 0x07e0
117 || p_vout->output.i_bmask != 0x001f ) )
122 p_vout->chroma.pf_convert = E_(I420_RGB16);
126 /* Hmmm, is there only X11 using 32bits per pixel for RV24 ? */
127 case VLC_FOURCC('R','V','2','4'):
130 case VLC_FOURCC('R','V','3','2'):
131 #if defined (MODULE_NAME_IS_i420_rgb_mmx)
132 /* If we don't have support for the bitmasks, bail out */
133 if( p_vout->output.i_rmask != 0x00ff0000
134 || p_vout->output.i_gmask != 0x0000ff00
135 || p_vout->output.i_bmask != 0x000000ff )
140 p_vout->chroma.pf_convert = E_(I420_RGB32);
152 p_vout->chroma.p_sys = malloc( sizeof( chroma_sys_t ) );
153 if( p_vout->chroma.p_sys == NULL )
158 switch( p_vout->output.i_chroma )
160 #if defined (MODULE_NAME_IS_i420_rgb)
161 case VLC_FOURCC('R','G','B','2'):
162 p_vout->chroma.p_sys->p_buffer = malloc( VOUT_MAX_WIDTH );
166 case VLC_FOURCC('R','V','1','5'):
167 case VLC_FOURCC('R','V','1','6'):
168 p_vout->chroma.p_sys->p_buffer = malloc( VOUT_MAX_WIDTH * 2 );
171 case VLC_FOURCC('R','V','2','4'):
172 case VLC_FOURCC('R','V','3','2'):
173 p_vout->chroma.p_sys->p_buffer = malloc( VOUT_MAX_WIDTH * 4 );
177 p_vout->chroma.p_sys->p_buffer = NULL;
181 if( p_vout->chroma.p_sys->p_buffer == NULL )
183 free( p_vout->chroma.p_sys );
187 p_vout->chroma.p_sys->p_offset = malloc( p_vout->output.i_width
188 * ( ( p_vout->output.i_chroma
189 == VLC_FOURCC('R','G','B','2') ) ? 2 : 1 )
191 if( p_vout->chroma.p_sys->p_offset == NULL )
193 free( p_vout->chroma.p_sys->p_buffer );
194 free( p_vout->chroma.p_sys );
198 #if defined (MODULE_NAME_IS_i420_rgb)
199 switch( p_vout->output.i_chroma )
201 case VLC_FOURCC('R','G','B','2'):
202 i_tables_size = sizeof( uint8_t ) * PALETTE_TABLE_SIZE;
204 case VLC_FOURCC('R','V','1','5'):
205 case VLC_FOURCC('R','V','1','6'):
206 i_tables_size = sizeof( uint16_t ) * RGB_TABLE_SIZE;
208 default: /* RV24, RV32 */
209 i_tables_size = sizeof( uint32_t ) * RGB_TABLE_SIZE;
213 p_vout->chroma.p_sys->p_base = malloc( i_tables_size );
214 if( p_vout->chroma.p_sys->p_base == NULL )
216 free( p_vout->chroma.p_sys->p_offset );
217 free( p_vout->chroma.p_sys->p_buffer );
218 free( p_vout->chroma.p_sys );
228 /*****************************************************************************
229 * Deactivate: free the chroma function
230 *****************************************************************************
231 * This function frees the previously allocated chroma function
232 *****************************************************************************/
233 static void Deactivate( vlc_object_t *p_this )
235 vout_thread_t *p_vout = (vout_thread_t *)p_this;
237 #if defined (MODULE_NAME_IS_i420_rgb)
238 free( p_vout->chroma.p_sys->p_base );
240 free( p_vout->chroma.p_sys->p_offset );
241 free( p_vout->chroma.p_sys->p_buffer );
242 free( p_vout->chroma.p_sys );
245 #if defined (MODULE_NAME_IS_i420_rgb)
246 /*****************************************************************************
247 * SetGammaTable: return intensity table transformed by gamma curve.
248 *****************************************************************************
249 * pi_table is a table of 256 entries from 0 to 255.
250 *****************************************************************************/
251 static void SetGammaTable( int *pi_table, double f_gamma )
253 int i_y; /* base intensity */
255 /* Use exp(gamma) instead of gamma */
256 f_gamma = exp( f_gamma );
258 /* Build gamma table */
259 for( i_y = 0; i_y < 256; i_y++ )
261 pi_table[ i_y ] = (int)( pow( (double)i_y / 256, f_gamma ) * 256 );
265 /*****************************************************************************
266 * SetYUV: compute tables and set function pointers
267 *****************************************************************************/
268 static void SetYUV( vout_thread_t *p_vout )
270 int pi_gamma[256]; /* gamma table */
271 volatile int i_index; /* index in tables */
272 /* We use volatile here to work around a strange gcc-3.3.4
273 * optimization bug */
275 /* Build gamma table */
276 SetGammaTable( pi_gamma, p_vout->f_gamma );
279 * Set pointers and build YUV tables
282 /* Color: build red, green and blue tables */
283 switch( p_vout->output.i_chroma )
285 case VLC_FOURCC('R','G','B','2'):
286 p_vout->chroma.p_sys->p_rgb8 = (uint8_t *)p_vout->chroma.p_sys->p_base;
287 Set8bppPalette( p_vout, p_vout->chroma.p_sys->p_rgb8 );
290 case VLC_FOURCC('R','V','1','5'):
291 case VLC_FOURCC('R','V','1','6'):
292 p_vout->chroma.p_sys->p_rgb16 = (uint16_t *)p_vout->chroma.p_sys->p_base;
293 for( i_index = 0; i_index < RED_MARGIN; i_index++ )
295 p_vout->chroma.p_sys->p_rgb16[RED_OFFSET - RED_MARGIN + i_index] = RGB2PIXEL( p_vout, pi_gamma[0], 0, 0 );
296 p_vout->chroma.p_sys->p_rgb16[RED_OFFSET + 256 + i_index] = RGB2PIXEL( p_vout, pi_gamma[255], 0, 0 );
298 for( i_index = 0; i_index < GREEN_MARGIN; i_index++ )
300 p_vout->chroma.p_sys->p_rgb16[GREEN_OFFSET - GREEN_MARGIN + i_index] = RGB2PIXEL( p_vout, 0, pi_gamma[0], 0 );
301 p_vout->chroma.p_sys->p_rgb16[GREEN_OFFSET + 256 + i_index] = RGB2PIXEL( p_vout, 0, pi_gamma[255], 0 );
303 for( i_index = 0; i_index < BLUE_MARGIN; i_index++ )
305 p_vout->chroma.p_sys->p_rgb16[BLUE_OFFSET - BLUE_MARGIN + i_index] = RGB2PIXEL( p_vout, 0, 0, pi_gamma[0] );
306 p_vout->chroma.p_sys->p_rgb16[BLUE_OFFSET + BLUE_MARGIN + i_index] = RGB2PIXEL( p_vout, 0, 0, pi_gamma[255] );
308 for( i_index = 0; i_index < 256; i_index++ )
310 p_vout->chroma.p_sys->p_rgb16[RED_OFFSET + i_index] = RGB2PIXEL( p_vout, pi_gamma[ i_index ], 0, 0 );
311 p_vout->chroma.p_sys->p_rgb16[GREEN_OFFSET + i_index] = RGB2PIXEL( p_vout, 0, pi_gamma[ i_index ], 0 );
312 p_vout->chroma.p_sys->p_rgb16[BLUE_OFFSET + i_index] = RGB2PIXEL( p_vout, 0, 0, pi_gamma[ i_index ] );
316 case VLC_FOURCC('R','V','2','4'):
317 case VLC_FOURCC('R','V','3','2'):
318 p_vout->chroma.p_sys->p_rgb32 = (uint32_t *)p_vout->chroma.p_sys->p_base;
319 for( i_index = 0; i_index < RED_MARGIN; i_index++ )
321 p_vout->chroma.p_sys->p_rgb32[RED_OFFSET - RED_MARGIN + i_index] = RGB2PIXEL( p_vout, pi_gamma[0], 0, 0 );
322 p_vout->chroma.p_sys->p_rgb32[RED_OFFSET + 256 + i_index] = RGB2PIXEL( p_vout, pi_gamma[255], 0, 0 );
324 for( i_index = 0; i_index < GREEN_MARGIN; i_index++ )
326 p_vout->chroma.p_sys->p_rgb32[GREEN_OFFSET - GREEN_MARGIN + i_index] = RGB2PIXEL( p_vout, 0, pi_gamma[0], 0 );
327 p_vout->chroma.p_sys->p_rgb32[GREEN_OFFSET + 256 + i_index] = RGB2PIXEL( p_vout, 0, pi_gamma[255], 0 );
329 for( i_index = 0; i_index < BLUE_MARGIN; i_index++ )
331 p_vout->chroma.p_sys->p_rgb32[BLUE_OFFSET - BLUE_MARGIN + i_index] = RGB2PIXEL( p_vout, 0, 0, pi_gamma[0] );
332 p_vout->chroma.p_sys->p_rgb32[BLUE_OFFSET + BLUE_MARGIN + i_index] = RGB2PIXEL( p_vout, 0, 0, pi_gamma[255] );
334 for( i_index = 0; i_index < 256; i_index++ )
336 p_vout->chroma.p_sys->p_rgb32[RED_OFFSET + i_index] = RGB2PIXEL( p_vout, pi_gamma[ i_index ], 0, 0 );
337 p_vout->chroma.p_sys->p_rgb32[GREEN_OFFSET + i_index] = RGB2PIXEL( p_vout, 0, pi_gamma[ i_index ], 0 );
338 p_vout->chroma.p_sys->p_rgb32[BLUE_OFFSET + i_index] = RGB2PIXEL( p_vout, 0, 0, pi_gamma[ i_index ] );
344 static void Set8bppPalette( vout_thread_t *p_vout, uint8_t *p_rgb8 )
346 #define CLIP( x ) ( ((x < 0) ? 0 : (x > 255) ? 255 : x) << 8 )
351 uint16_t *p_cmap_r=p_vout->chroma.p_sys->p_rgb_r;
352 uint16_t *p_cmap_g=p_vout->chroma.p_sys->p_rgb_g;
353 uint16_t *p_cmap_b=p_vout->chroma.p_sys->p_rgb_b;
355 unsigned char p_lookup[PALETTE_TABLE_SIZE];
357 /* This loop calculates the intersection of an YUV box and the RGB cube. */
358 for ( y = 0; y <= 256; y += 16, i += 128 - 81 )
360 for ( u = 0; u <= 256; u += 32 )
362 for ( v = 0; v <= 256; v += 32 )
364 r = y + ( (V_RED_COEF*(v-128)) >> SHIFT );
365 g = y + ( (U_GREEN_COEF*(u-128)
366 + V_GREEN_COEF*(v-128)) >> SHIFT );
367 b = y + ( (U_BLUE_COEF*(u-128)) >> SHIFT );
369 if( r >= 0x00 && g >= 0x00 && b >= 0x00
370 && r <= 0xff && g <= 0xff && b <= 0xff )
372 /* This one should never happen unless someone
373 * fscked up my code */
376 msg_Err( p_vout, "no colors left in palette" );
380 /* Clip the colors */
381 p_cmap_r[ j ] = CLIP( r );
382 p_cmap_g[ j ] = CLIP( g );
383 p_cmap_b[ j ] = CLIP( b );
386 printf("+++Alloc RGB cmap %d (%d, %d, %d)\n", j,
387 p_cmap_r[ j ] >>8, p_cmap_g[ j ] >>8,
405 /* The colors have been allocated, we can set the palette */
406 p_vout->output.pf_setpalette( p_vout, p_cmap_r, p_cmap_g, p_cmap_b );
409 /* There will eventually be a way to know which colors
410 * couldn't be allocated and try to find a replacement */
411 p_vout->i_white_pixel = 0xff;
412 p_vout->i_black_pixel = 0x00;
413 p_vout->i_gray_pixel = 0x44;
414 p_vout->i_blue_pixel = 0x3b;
417 /* This loop allocates colors that got outside the RGB cube */
418 for ( i = 0, y = 0; y <= 256; y += 16, i += 128 - 81 )
420 for ( u = 0; u <= 256; u += 32 )
422 for ( v = 0; v <= 256; v += 32, i++ )
424 int u2, v2, dist, mindist = 100000000;
426 if( p_lookup[ i ] || y == 0 )
432 for( u2 = 0; u2 <= 256; u2 += 32 )
434 for( v2 = 0; v2 <= 256; v2 += 32 )
436 j = ((y>>4)<<7) + (u2>>5)*9 + (v2>>5);
437 dist = (u-u2)*(u-u2) + (v-v2)*(v-v2);
439 /* Find the nearest color */
440 if( p_lookup[ j ] && dist < mindist )
442 p_rgb8[ i ] = p_rgb8[ j ];
448 /* Find the nearest color */
449 if( p_lookup[ j ] && dist + 128 < mindist )
451 p_rgb8[ i ] = p_rgb8[ j ];
452 mindist = dist + 128;