1 /*****************************************************************************
2 * i420_rgb.c : YUV to bitmap RGB conversion module for vlc
3 *****************************************************************************
4 * Copyright (C) 2000, 2001, 2004, 2008 the VideoLAN team
7 * Authors: Sam Hocevar <sam@zoy.org>
8 * Damien Fouilleul <damienf@videolan.org>
10 * This program is free software; you can redistribute it and/or modify
11 * it under the terms of the GNU General Public License as published by
12 * the Free Software Foundation; either version 2 of the License, or
13 * (at your option) any later version.
15 * This program is distributed in the hope that it will be useful,
16 * but WITHOUT ANY WARRANTY; without even the implied warranty of
17 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
18 * GNU General Public License for more details.
20 * You should have received a copy of the GNU General Public License
21 * along with this program; if not, write to the Free Software
22 * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston MA 02110-1301, USA.
23 *****************************************************************************/
25 /*****************************************************************************
27 *****************************************************************************/
33 #include <math.h> /* exp(), pow() */
35 #include <vlc_common.h>
36 #include <vlc_plugin.h>
37 #include <vlc_filter.h>
41 #if defined (MODULE_NAME_IS_i420_rgb)
42 # include "i420_rgb_c.h"
43 static picture_t *I420_RGB8_Filter ( filter_t *, picture_t * );
44 // static picture_t *I420_RGB16_dither_Filter ( filter_t *, picture_t * );
45 static picture_t *I420_RGB16_Filter ( filter_t *, picture_t * );
46 static picture_t *I420_RGB32_Filter ( filter_t *, picture_t * );
48 static picture_t *I420_R5G5B5_Filter ( filter_t *, picture_t * );
49 static picture_t *I420_R5G6B5_Filter ( filter_t *, picture_t * );
50 static picture_t *I420_A8R8G8B8_Filter ( filter_t *, picture_t * );
51 static picture_t *I420_R8G8B8A8_Filter ( filter_t *, picture_t * );
52 static picture_t *I420_B8G8R8A8_Filter ( filter_t *, picture_t * );
53 static picture_t *I420_A8B8G8R8_Filter ( filter_t *, picture_t * );
56 /*****************************************************************************
57 * RGB2PIXEL: assemble RGB components to a pixel value, returns a uint32_t
58 *****************************************************************************/
59 #define RGB2PIXEL( p_filter, i_r, i_g, i_b ) \
60 (((((uint32_t)i_r) >> p_filter->fmt_out.video.i_rrshift) \
61 << p_filter->fmt_out.video.i_lrshift) \
62 | ((((uint32_t)i_g) >> p_filter->fmt_out.video.i_rgshift) \
63 << p_filter->fmt_out.video.i_lgshift) \
64 | ((((uint32_t)i_b) >> p_filter->fmt_out.video.i_rbshift) \
65 << p_filter->fmt_out.video.i_lbshift))
67 /*****************************************************************************
68 * Local and extern prototypes.
69 *****************************************************************************/
70 static int Activate ( vlc_object_t * );
71 static void Deactivate ( vlc_object_t * );
73 #if defined (MODULE_NAME_IS_i420_rgb)
74 static void SetGammaTable ( int *pi_table, double f_gamma );
75 static void SetYUV ( filter_t * );
76 static void Set8bppPalette ( filter_t *, uint8_t * );
79 /*****************************************************************************
81 *****************************************************************************/
83 #if defined (MODULE_NAME_IS_i420_rgb)
84 set_description( N_("I420,IYUV,YV12 to "
85 "RGB2,RV15,RV16,RV24,RV32 conversions") )
86 set_capability( "video filter2", 80 )
87 #elif defined (MODULE_NAME_IS_i420_rgb_mmx)
88 set_description( N_( "MMX I420,IYUV,YV12 to "
89 "RV15,RV16,RV24,RV32 conversions") )
90 set_capability( "video filter2", 100 )
91 add_requirement( MMX )
92 #elif defined (MODULE_NAME_IS_i420_rgb_sse2)
93 set_description( N_( "SSE2 I420,IYUV,YV12 to "
94 "RV15,RV16,RV24,RV32 conversions") )
95 set_capability( "video filter2", 120 )
96 add_requirement( SSE2 )
98 set_callbacks( Activate, Deactivate )
101 /*****************************************************************************
102 * Activate: allocate a chroma function
103 *****************************************************************************
104 * This function allocates and initializes a chroma function
105 *****************************************************************************/
106 static int Activate( vlc_object_t *p_this )
108 filter_t *p_filter = (filter_t *)p_this;
109 #if defined (MODULE_NAME_IS_i420_rgb)
110 size_t i_tables_size;
113 if( p_filter->fmt_out.video.i_width & 1
114 || p_filter->fmt_out.video.i_height & 1 )
119 switch( p_filter->fmt_in.video.i_chroma )
123 switch( p_filter->fmt_out.video.i_chroma )
125 #if defined (MODULE_NAME_IS_i420_rgb)
127 p_filter->pf_video_filter = I420_RGB8_Filter;
130 case VLC_CODEC_RGB15:
131 case VLC_CODEC_RGB16:
132 #if ! defined (MODULE_NAME_IS_i420_rgb)
133 /* If we don't have support for the bitmasks, bail out */
134 if( ( p_filter->fmt_out.video.i_rmask == 0x7c00
135 && p_filter->fmt_out.video.i_gmask == 0x03e0
136 && p_filter->fmt_out.video.i_bmask == 0x001f ) )
138 /* R5G5B6 pixel format */
139 msg_Dbg(p_this, "RGB pixel format is R5G5B5");
140 p_filter->pf_video_filter = I420_R5G5B5_Filter;
142 else if( ( p_filter->fmt_out.video.i_rmask == 0xf800
143 && p_filter->fmt_out.video.i_gmask == 0x07e0
144 && p_filter->fmt_out.video.i_bmask == 0x001f ) )
146 /* R5G6B5 pixel format */
147 msg_Dbg(p_this, "RGB pixel format is R5G6B5");
148 p_filter->pf_video_filter = I420_R5G6B5_Filter;
153 // generic C chroma converter */
154 p_filter->pf_video_filter = I420_RGB16_Filter;
159 /* Hmmm, is there only X11 using 32bits per pixel for RV24 ? */
160 case VLC_CODEC_RGB24:
163 case VLC_CODEC_RGB32:
164 #if ! defined (MODULE_NAME_IS_i420_rgb)
165 /* If we don't have support for the bitmasks, bail out */
166 if( p_filter->fmt_out.video.i_rmask == 0x00ff0000
167 && p_filter->fmt_out.video.i_gmask == 0x0000ff00
168 && p_filter->fmt_out.video.i_bmask == 0x000000ff )
170 /* A8R8G8B8 pixel format */
171 msg_Dbg(p_this, "RGB pixel format is A8R8G8B8");
172 p_filter->pf_video_filter = I420_A8R8G8B8_Filter;
174 else if( p_filter->fmt_out.video.i_rmask == 0xff000000
175 && p_filter->fmt_out.video.i_gmask == 0x00ff0000
176 && p_filter->fmt_out.video.i_bmask == 0x0000ff00 )
178 /* R8G8B8A8 pixel format */
179 msg_Dbg(p_this, "RGB pixel format is R8G8B8A8");
180 p_filter->pf_video_filter = I420_R8G8B8A8_Filter;
182 else if( p_filter->fmt_out.video.i_rmask == 0x0000ff00
183 && p_filter->fmt_out.video.i_gmask == 0x00ff0000
184 && p_filter->fmt_out.video.i_bmask == 0xff000000 )
186 /* B8G8R8A8 pixel format */
187 msg_Dbg(p_this, "RGB pixel format is B8G8R8A8");
188 p_filter->pf_video_filter = I420_B8G8R8A8_Filter;
190 else if( p_filter->fmt_out.video.i_rmask == 0x000000ff
191 && p_filter->fmt_out.video.i_gmask == 0x0000ff00
192 && p_filter->fmt_out.video.i_bmask == 0x00ff0000 )
194 /* A8B8G8R8 pixel format */
195 msg_Dbg(p_this, "RGB pixel format is A8B8G8R8");
196 p_filter->pf_video_filter = I420_A8B8G8R8_Filter;
201 /* generic C chroma converter */
202 p_filter->pf_video_filter = I420_RGB32_Filter;
215 p_filter->p_sys = malloc( sizeof( filter_sys_t ) );
216 if( p_filter->p_sys == NULL )
221 switch( p_filter->fmt_out.video.i_chroma )
223 #if defined (MODULE_NAME_IS_i420_rgb)
225 p_filter->p_sys->p_buffer = malloc( VOUT_MAX_WIDTH );
229 case VLC_CODEC_RGB15:
230 case VLC_CODEC_RGB16:
231 p_filter->p_sys->p_buffer = malloc( VOUT_MAX_WIDTH * 2 );
234 case VLC_CODEC_RGB24:
235 case VLC_CODEC_RGB32:
236 p_filter->p_sys->p_buffer = malloc( VOUT_MAX_WIDTH * 4 );
240 p_filter->p_sys->p_buffer = NULL;
244 if( p_filter->p_sys->p_buffer == NULL )
246 free( p_filter->p_sys );
250 p_filter->p_sys->p_offset = malloc( p_filter->fmt_out.video.i_width
251 * ( ( p_filter->fmt_out.video.i_chroma
252 == VLC_CODEC_RGB8 ) ? 2 : 1 )
254 if( p_filter->p_sys->p_offset == NULL )
256 free( p_filter->p_sys->p_buffer );
257 free( p_filter->p_sys );
261 #if defined (MODULE_NAME_IS_i420_rgb)
262 switch( p_filter->fmt_out.video.i_chroma )
265 i_tables_size = sizeof( uint8_t ) * PALETTE_TABLE_SIZE;
267 case VLC_CODEC_RGB15:
268 case VLC_CODEC_RGB16:
269 i_tables_size = sizeof( uint16_t ) * RGB_TABLE_SIZE;
271 default: /* RV24, RV32 */
272 i_tables_size = sizeof( uint32_t ) * RGB_TABLE_SIZE;
276 p_filter->p_sys->p_base = malloc( i_tables_size );
277 if( p_filter->p_sys->p_base == NULL )
279 free( p_filter->p_sys->p_offset );
280 free( p_filter->p_sys->p_buffer );
281 free( p_filter->p_sys );
291 /*****************************************************************************
292 * Deactivate: free the chroma function
293 *****************************************************************************
294 * This function frees the previously allocated chroma function
295 *****************************************************************************/
296 static void Deactivate( vlc_object_t *p_this )
298 filter_t *p_filter = (filter_t *)p_this;
300 #if defined (MODULE_NAME_IS_i420_rgb)
301 free( p_filter->p_sys->p_base );
303 free( p_filter->p_sys->p_offset );
304 free( p_filter->p_sys->p_buffer );
305 free( p_filter->p_sys );
308 #if defined (MODULE_NAME_IS_i420_rgb)
309 VIDEO_FILTER_WRAPPER( I420_RGB8 )
310 VIDEO_FILTER_WRAPPER( I420_RGB16 )
311 //VIDEO_FILTER_WRAPPER( I420_RGB16_dither )
312 VIDEO_FILTER_WRAPPER( I420_RGB32 )
314 VIDEO_FILTER_WRAPPER( I420_R5G5B5 )
315 VIDEO_FILTER_WRAPPER( I420_R5G6B5 )
316 VIDEO_FILTER_WRAPPER( I420_A8R8G8B8 )
317 VIDEO_FILTER_WRAPPER( I420_R8G8B8A8 )
318 VIDEO_FILTER_WRAPPER( I420_B8G8R8A8 )
319 VIDEO_FILTER_WRAPPER( I420_A8B8G8R8 )
322 #if defined (MODULE_NAME_IS_i420_rgb)
323 /*****************************************************************************
324 * SetGammaTable: return intensity table transformed by gamma curve.
325 *****************************************************************************
326 * pi_table is a table of 256 entries from 0 to 255.
327 *****************************************************************************/
328 static void SetGammaTable( int *pi_table, double f_gamma )
330 int i_y; /* base intensity */
332 /* Use exp(gamma) instead of gamma */
333 f_gamma = exp( f_gamma );
335 /* Build gamma table */
336 for( i_y = 0; i_y < 256; i_y++ )
338 pi_table[ i_y ] = (int)( pow( (double)i_y / 256, f_gamma ) * 256 );
342 /*****************************************************************************
343 * SetYUV: compute tables and set function pointers
344 *****************************************************************************/
345 static void SetYUV( filter_t *p_filter )
347 int pi_gamma[256]; /* gamma table */
348 volatile int i_index; /* index in tables */
349 /* We use volatile here to work around a strange gcc-3.3.4
350 * optimization bug */
352 /* Build gamma table */
353 SetGammaTable( pi_gamma, 0 ); //p_filter/*FIXME wasn't used anywhere anyway*/->f_gamma );
356 * Set pointers and build YUV tables
359 /* Color: build red, green and blue tables */
360 switch( p_filter->fmt_out.video.i_chroma )
363 p_filter->p_sys->p_rgb8 = (uint8_t *)p_filter->p_sys->p_base;
364 Set8bppPalette( p_filter, p_filter->p_sys->p_rgb8 );
367 case VLC_CODEC_RGB15:
368 case VLC_CODEC_RGB16:
369 p_filter->p_sys->p_rgb16 = (uint16_t *)p_filter->p_sys->p_base;
370 for( i_index = 0; i_index < RED_MARGIN; i_index++ )
372 p_filter->p_sys->p_rgb16[RED_OFFSET - RED_MARGIN + i_index] = RGB2PIXEL( p_filter, pi_gamma[0], 0, 0 );
373 p_filter->p_sys->p_rgb16[RED_OFFSET + 256 + i_index] = RGB2PIXEL( p_filter, pi_gamma[255], 0, 0 );
375 for( i_index = 0; i_index < GREEN_MARGIN; i_index++ )
377 p_filter->p_sys->p_rgb16[GREEN_OFFSET - GREEN_MARGIN + i_index] = RGB2PIXEL( p_filter, 0, pi_gamma[0], 0 );
378 p_filter->p_sys->p_rgb16[GREEN_OFFSET + 256 + i_index] = RGB2PIXEL( p_filter, 0, pi_gamma[255], 0 );
380 for( i_index = 0; i_index < BLUE_MARGIN; i_index++ )
382 p_filter->p_sys->p_rgb16[BLUE_OFFSET - BLUE_MARGIN + i_index] = RGB2PIXEL( p_filter, 0, 0, pi_gamma[0] );
383 p_filter->p_sys->p_rgb16[BLUE_OFFSET + BLUE_MARGIN + i_index] = RGB2PIXEL( p_filter, 0, 0, pi_gamma[255] );
385 for( i_index = 0; i_index < 256; i_index++ )
387 p_filter->p_sys->p_rgb16[RED_OFFSET + i_index] = RGB2PIXEL( p_filter, pi_gamma[ i_index ], 0, 0 );
388 p_filter->p_sys->p_rgb16[GREEN_OFFSET + i_index] = RGB2PIXEL( p_filter, 0, pi_gamma[ i_index ], 0 );
389 p_filter->p_sys->p_rgb16[BLUE_OFFSET + i_index] = RGB2PIXEL( p_filter, 0, 0, pi_gamma[ i_index ] );
393 case VLC_CODEC_RGB24:
394 case VLC_CODEC_RGB32:
395 p_filter->p_sys->p_rgb32 = (uint32_t *)p_filter->p_sys->p_base;
396 for( i_index = 0; i_index < RED_MARGIN; i_index++ )
398 p_filter->p_sys->p_rgb32[RED_OFFSET - RED_MARGIN + i_index] = RGB2PIXEL( p_filter, pi_gamma[0], 0, 0 );
399 p_filter->p_sys->p_rgb32[RED_OFFSET + 256 + i_index] = RGB2PIXEL( p_filter, pi_gamma[255], 0, 0 );
401 for( i_index = 0; i_index < GREEN_MARGIN; i_index++ )
403 p_filter->p_sys->p_rgb32[GREEN_OFFSET - GREEN_MARGIN + i_index] = RGB2PIXEL( p_filter, 0, pi_gamma[0], 0 );
404 p_filter->p_sys->p_rgb32[GREEN_OFFSET + 256 + i_index] = RGB2PIXEL( p_filter, 0, pi_gamma[255], 0 );
406 for( i_index = 0; i_index < BLUE_MARGIN; i_index++ )
408 p_filter->p_sys->p_rgb32[BLUE_OFFSET - BLUE_MARGIN + i_index] = RGB2PIXEL( p_filter, 0, 0, pi_gamma[0] );
409 p_filter->p_sys->p_rgb32[BLUE_OFFSET + BLUE_MARGIN + i_index] = RGB2PIXEL( p_filter, 0, 0, pi_gamma[255] );
411 for( i_index = 0; i_index < 256; i_index++ )
413 p_filter->p_sys->p_rgb32[RED_OFFSET + i_index] = RGB2PIXEL( p_filter, pi_gamma[ i_index ], 0, 0 );
414 p_filter->p_sys->p_rgb32[GREEN_OFFSET + i_index] = RGB2PIXEL( p_filter, 0, pi_gamma[ i_index ], 0 );
415 p_filter->p_sys->p_rgb32[BLUE_OFFSET + i_index] = RGB2PIXEL( p_filter, 0, 0, pi_gamma[ i_index ] );
421 static void Set8bppPalette( filter_t *p_filter, uint8_t *p_rgb8 )
423 #define CLIP( x ) ( ((x < 0) ? 0 : (x > 255) ? 255 : x) << 8 )
428 uint16_t *p_cmap_r = p_filter->p_sys->p_rgb_r;
429 uint16_t *p_cmap_g = p_filter->p_sys->p_rgb_g;
430 uint16_t *p_cmap_b = p_filter->p_sys->p_rgb_b;
432 unsigned char p_lookup[PALETTE_TABLE_SIZE];
434 /* This loop calculates the intersection of an YUV box and the RGB cube. */
435 for ( y = 0; y <= 256; y += 16, i += 128 - 81 )
437 for ( u = 0; u <= 256; u += 32 )
439 for ( v = 0; v <= 256; v += 32 )
441 r = y + ( (V_RED_COEF*(v-128)) >> SHIFT );
442 g = y + ( (U_GREEN_COEF*(u-128)
443 + V_GREEN_COEF*(v-128)) >> SHIFT );
444 b = y + ( (U_BLUE_COEF*(u-128)) >> SHIFT );
446 if( r >= 0x00 && g >= 0x00 && b >= 0x00
447 && r <= 0xff && g <= 0xff && b <= 0xff )
449 /* This one should never happen unless someone
450 * fscked up my code */
453 msg_Err( p_filter, "no colors left in palette" );
457 /* Clip the colors */
458 p_cmap_r[ j ] = CLIP( r );
459 p_cmap_g[ j ] = CLIP( g );
460 p_cmap_b[ j ] = CLIP( b );
463 printf("+++Alloc RGB cmap %d (%d, %d, %d)\n", j,
464 p_cmap_r[ j ] >>8, p_cmap_g[ j ] >>8,
482 /* The colors have been allocated, we can set the palette */
483 /* FIXME FIXME FIXME FIXME FIXME FIXME FIXME FIXME FIXME
484 p_filter->fmt_out.video.pf_setpalette( p_filter, p_cmap_r, p_cmap_g, p_cmap_b );*/
487 /* There will eventually be a way to know which colors
488 * couldn't be allocated and try to find a replacement */
489 p_vout->i_white_pixel = 0xff;
490 p_vout->i_black_pixel = 0x00;
491 p_vout->i_gray_pixel = 0x44;
492 p_vout->i_blue_pixel = 0x3b;
495 /* This loop allocates colors that got outside the RGB cube */
496 for ( i = 0, y = 0; y <= 256; y += 16, i += 128 - 81 )
498 for ( u = 0; u <= 256; u += 32 )
500 for ( v = 0; v <= 256; v += 32, i++ )
502 int u2, v2, dist, mindist = 100000000;
504 if( p_lookup[ i ] || y == 0 )
510 for( u2 = 0; u2 <= 256; u2 += 32 )
512 for( v2 = 0; v2 <= 256; v2 += 32 )
514 j = ((y>>4)<<7) + (u2>>5)*9 + (v2>>5);
515 dist = (u-u2)*(u-u2) + (v-v2)*(v-v2);
517 /* Find the nearest color */
518 if( p_lookup[ j ] && dist < mindist )
520 p_rgb8[ i ] = p_rgb8[ j ];
526 /* Find the nearest color */
527 if( p_lookup[ j ] && dist + 128 < mindist )
529 p_rgb8[ i ] = p_rgb8[ j ];
530 mindist = dist + 128;