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>
40 #if defined (MODULE_NAME_IS_i420_rgb)
41 # include "i420_rgb_c.h"
42 static picture_t *I420_RGB8_Filter ( filter_t *, picture_t * );
43 // static picture_t *I420_RGB16_dither_Filter ( filter_t *, picture_t * );
44 static picture_t *I420_RGB16_Filter ( filter_t *, picture_t * );
45 static picture_t *I420_RGB32_Filter ( filter_t *, picture_t * );
47 static picture_t *I420_R5G5B5_Filter ( filter_t *, picture_t * );
48 static picture_t *I420_R5G6B5_Filter ( filter_t *, picture_t * );
49 static picture_t *I420_A8R8G8B8_Filter ( filter_t *, picture_t * );
50 static picture_t *I420_R8G8B8A8_Filter ( filter_t *, picture_t * );
51 static picture_t *I420_B8G8R8A8_Filter ( filter_t *, picture_t * );
52 static picture_t *I420_A8B8G8R8_Filter ( filter_t *, picture_t * );
55 /*****************************************************************************
56 * RGB2PIXEL: assemble RGB components to a pixel value, returns a uint32_t
57 *****************************************************************************/
58 #define RGB2PIXEL( p_filter, i_r, i_g, i_b ) \
59 (((((uint32_t)i_r) >> p_filter->fmt_out.video.i_rrshift) \
60 << p_filter->fmt_out.video.i_lrshift) \
61 | ((((uint32_t)i_g) >> p_filter->fmt_out.video.i_rgshift) \
62 << p_filter->fmt_out.video.i_lgshift) \
63 | ((((uint32_t)i_b) >> p_filter->fmt_out.video.i_rbshift) \
64 << p_filter->fmt_out.video.i_lbshift))
66 /*****************************************************************************
67 * Local and extern prototypes.
68 *****************************************************************************/
69 static int Activate ( vlc_object_t * );
70 static void Deactivate ( vlc_object_t * );
72 #if defined (MODULE_NAME_IS_i420_rgb)
73 static void SetGammaTable ( int *pi_table, double f_gamma );
74 static void SetYUV ( filter_t * );
75 static void Set8bppPalette ( filter_t *, uint8_t * );
78 /*****************************************************************************
80 *****************************************************************************/
82 #if defined (MODULE_NAME_IS_i420_rgb)
83 set_description( N_("I420,IYUV,YV12 to "
84 "RGB2,RV15,RV16,RV24,RV32 conversions") )
85 set_capability( "video filter2", 80 )
86 #elif defined (MODULE_NAME_IS_i420_rgb_mmx)
87 set_description( N_( "MMX I420,IYUV,YV12 to "
88 "RV15,RV16,RV24,RV32 conversions") )
89 set_capability( "video filter2", 100 )
90 add_requirement( MMX )
91 #elif defined (MODULE_NAME_IS_i420_rgb_sse2)
92 set_description( N_( "SSE2 I420,IYUV,YV12 to "
93 "RV15,RV16,RV24,RV32 conversions") )
94 set_capability( "video filter2", 120 )
95 add_requirement( SSE2 )
97 set_callbacks( Activate, Deactivate )
100 /*****************************************************************************
101 * Activate: allocate a chroma function
102 *****************************************************************************
103 * This function allocates and initializes a chroma function
104 *****************************************************************************/
105 static int Activate( vlc_object_t *p_this )
107 filter_t *p_filter = (filter_t *)p_this;
108 #if defined (MODULE_NAME_IS_i420_rgb)
109 size_t i_tables_size;
112 if( p_filter->fmt_out.video.i_width & 1
113 || p_filter->fmt_out.video.i_height & 1 )
118 switch( p_filter->fmt_in.video.i_chroma )
122 switch( p_filter->fmt_out.video.i_chroma )
124 #if defined (MODULE_NAME_IS_i420_rgb)
126 p_filter->pf_video_filter = I420_RGB8_Filter;
129 case VLC_CODEC_RGB15:
130 case VLC_CODEC_RGB16:
131 #if ! defined (MODULE_NAME_IS_i420_rgb)
132 /* If we don't have support for the bitmasks, bail out */
133 if( ( p_filter->fmt_out.video.i_rmask == 0x7c00
134 && p_filter->fmt_out.video.i_gmask == 0x03e0
135 && p_filter->fmt_out.video.i_bmask == 0x001f ) )
137 /* R5G5B6 pixel format */
138 msg_Dbg(p_this, "RGB pixel format is R5G5B5");
139 p_filter->pf_video_filter = I420_R5G5B5_Filter;
141 else if( ( p_filter->fmt_out.video.i_rmask == 0xf800
142 && p_filter->fmt_out.video.i_gmask == 0x07e0
143 && p_filter->fmt_out.video.i_bmask == 0x001f ) )
145 /* R5G6B5 pixel format */
146 msg_Dbg(p_this, "RGB pixel format is R5G6B5");
147 p_filter->pf_video_filter = I420_R5G6B5_Filter;
152 // generic C chroma converter */
153 p_filter->pf_video_filter = I420_RGB16_Filter;
158 /* Hmmm, is there only X11 using 32bits per pixel for RV24 ? */
159 case VLC_CODEC_RGB24:
162 case VLC_CODEC_RGB32:
163 #if ! defined (MODULE_NAME_IS_i420_rgb)
164 /* If we don't have support for the bitmasks, bail out */
165 if( p_filter->fmt_out.video.i_rmask == 0x00ff0000
166 && p_filter->fmt_out.video.i_gmask == 0x0000ff00
167 && p_filter->fmt_out.video.i_bmask == 0x000000ff )
169 /* A8R8G8B8 pixel format */
170 msg_Dbg(p_this, "RGB pixel format is A8R8G8B8");
171 p_filter->pf_video_filter = I420_A8R8G8B8_Filter;
173 else if( p_filter->fmt_out.video.i_rmask == 0xff000000
174 && p_filter->fmt_out.video.i_gmask == 0x00ff0000
175 && p_filter->fmt_out.video.i_bmask == 0x0000ff00 )
177 /* R8G8B8A8 pixel format */
178 msg_Dbg(p_this, "RGB pixel format is R8G8B8A8");
179 p_filter->pf_video_filter = I420_R8G8B8A8_Filter;
181 else if( p_filter->fmt_out.video.i_rmask == 0x0000ff00
182 && p_filter->fmt_out.video.i_gmask == 0x00ff0000
183 && p_filter->fmt_out.video.i_bmask == 0xff000000 )
185 /* B8G8R8A8 pixel format */
186 msg_Dbg(p_this, "RGB pixel format is B8G8R8A8");
187 p_filter->pf_video_filter = I420_B8G8R8A8_Filter;
189 else if( p_filter->fmt_out.video.i_rmask == 0x000000ff
190 && p_filter->fmt_out.video.i_gmask == 0x0000ff00
191 && p_filter->fmt_out.video.i_bmask == 0x00ff0000 )
193 /* A8B8G8R8 pixel format */
194 msg_Dbg(p_this, "RGB pixel format is A8B8G8R8");
195 p_filter->pf_video_filter = I420_A8B8G8R8_Filter;
200 /* generic C chroma converter */
201 p_filter->pf_video_filter = I420_RGB32_Filter;
214 p_filter->p_sys = malloc( sizeof( filter_sys_t ) );
215 if( p_filter->p_sys == NULL )
220 switch( p_filter->fmt_out.video.i_chroma )
222 #if defined (MODULE_NAME_IS_i420_rgb)
224 p_filter->p_sys->p_buffer = malloc( VOUT_MAX_WIDTH );
228 case VLC_CODEC_RGB15:
229 case VLC_CODEC_RGB16:
230 p_filter->p_sys->p_buffer = malloc( VOUT_MAX_WIDTH * 2 );
233 case VLC_CODEC_RGB24:
234 case VLC_CODEC_RGB32:
235 p_filter->p_sys->p_buffer = malloc( VOUT_MAX_WIDTH * 4 );
239 p_filter->p_sys->p_buffer = NULL;
243 if( p_filter->p_sys->p_buffer == NULL )
245 free( p_filter->p_sys );
249 p_filter->p_sys->p_offset = malloc( p_filter->fmt_out.video.i_width
250 * ( ( p_filter->fmt_out.video.i_chroma
251 == VLC_CODEC_RGB8 ) ? 2 : 1 )
253 if( p_filter->p_sys->p_offset == NULL )
255 free( p_filter->p_sys->p_buffer );
256 free( p_filter->p_sys );
260 #if defined (MODULE_NAME_IS_i420_rgb)
261 switch( p_filter->fmt_out.video.i_chroma )
264 i_tables_size = sizeof( uint8_t ) * PALETTE_TABLE_SIZE;
266 case VLC_CODEC_RGB15:
267 case VLC_CODEC_RGB16:
268 i_tables_size = sizeof( uint16_t ) * RGB_TABLE_SIZE;
270 default: /* RV24, RV32 */
271 i_tables_size = sizeof( uint32_t ) * RGB_TABLE_SIZE;
275 p_filter->p_sys->p_base = malloc( i_tables_size );
276 if( p_filter->p_sys->p_base == NULL )
278 free( p_filter->p_sys->p_offset );
279 free( p_filter->p_sys->p_buffer );
280 free( p_filter->p_sys );
290 /*****************************************************************************
291 * Deactivate: free the chroma function
292 *****************************************************************************
293 * This function frees the previously allocated chroma function
294 *****************************************************************************/
295 static void Deactivate( vlc_object_t *p_this )
297 filter_t *p_filter = (filter_t *)p_this;
299 #if defined (MODULE_NAME_IS_i420_rgb)
300 free( p_filter->p_sys->p_base );
302 free( p_filter->p_sys->p_offset );
303 free( p_filter->p_sys->p_buffer );
304 free( p_filter->p_sys );
307 #if defined (MODULE_NAME_IS_i420_rgb)
308 VIDEO_FILTER_WRAPPER( I420_RGB8 )
309 VIDEO_FILTER_WRAPPER( I420_RGB16 )
310 //VIDEO_FILTER_WRAPPER( I420_RGB16_dither )
311 VIDEO_FILTER_WRAPPER( I420_RGB32 )
313 VIDEO_FILTER_WRAPPER( I420_R5G5B5 )
314 VIDEO_FILTER_WRAPPER( I420_R5G6B5 )
315 VIDEO_FILTER_WRAPPER( I420_A8R8G8B8 )
316 VIDEO_FILTER_WRAPPER( I420_R8G8B8A8 )
317 VIDEO_FILTER_WRAPPER( I420_B8G8R8A8 )
318 VIDEO_FILTER_WRAPPER( I420_A8B8G8R8 )
321 #if defined (MODULE_NAME_IS_i420_rgb)
322 /*****************************************************************************
323 * SetGammaTable: return intensity table transformed by gamma curve.
324 *****************************************************************************
325 * pi_table is a table of 256 entries from 0 to 255.
326 *****************************************************************************/
327 static void SetGammaTable( int *pi_table, double f_gamma )
329 int i_y; /* base intensity */
331 /* Use exp(gamma) instead of gamma */
332 f_gamma = exp( f_gamma );
334 /* Build gamma table */
335 for( i_y = 0; i_y < 256; i_y++ )
337 pi_table[ i_y ] = (int)( pow( (double)i_y / 256, f_gamma ) * 256 );
341 /*****************************************************************************
342 * SetYUV: compute tables and set function pointers
343 *****************************************************************************/
344 static void SetYUV( filter_t *p_filter )
346 int pi_gamma[256]; /* gamma table */
347 volatile int i_index; /* index in tables */
348 /* We use volatile here to work around a strange gcc-3.3.4
349 * optimization bug */
351 /* Build gamma table */
352 SetGammaTable( pi_gamma, 0 ); //p_filter/*FIXME wasn't used anywhere anyway*/->f_gamma );
355 * Set pointers and build YUV tables
358 /* Color: build red, green and blue tables */
359 switch( p_filter->fmt_out.video.i_chroma )
362 p_filter->p_sys->p_rgb8 = (uint8_t *)p_filter->p_sys->p_base;
363 Set8bppPalette( p_filter, p_filter->p_sys->p_rgb8 );
366 case VLC_CODEC_RGB15:
367 case VLC_CODEC_RGB16:
368 p_filter->p_sys->p_rgb16 = (uint16_t *)p_filter->p_sys->p_base;
369 for( i_index = 0; i_index < RED_MARGIN; i_index++ )
371 p_filter->p_sys->p_rgb16[RED_OFFSET - RED_MARGIN + i_index] = RGB2PIXEL( p_filter, pi_gamma[0], 0, 0 );
372 p_filter->p_sys->p_rgb16[RED_OFFSET + 256 + i_index] = RGB2PIXEL( p_filter, pi_gamma[255], 0, 0 );
374 for( i_index = 0; i_index < GREEN_MARGIN; i_index++ )
376 p_filter->p_sys->p_rgb16[GREEN_OFFSET - GREEN_MARGIN + i_index] = RGB2PIXEL( p_filter, 0, pi_gamma[0], 0 );
377 p_filter->p_sys->p_rgb16[GREEN_OFFSET + 256 + i_index] = RGB2PIXEL( p_filter, 0, pi_gamma[255], 0 );
379 for( i_index = 0; i_index < BLUE_MARGIN; i_index++ )
381 p_filter->p_sys->p_rgb16[BLUE_OFFSET - BLUE_MARGIN + i_index] = RGB2PIXEL( p_filter, 0, 0, pi_gamma[0] );
382 p_filter->p_sys->p_rgb16[BLUE_OFFSET + BLUE_MARGIN + i_index] = RGB2PIXEL( p_filter, 0, 0, pi_gamma[255] );
384 for( i_index = 0; i_index < 256; i_index++ )
386 p_filter->p_sys->p_rgb16[RED_OFFSET + i_index] = RGB2PIXEL( p_filter, pi_gamma[ i_index ], 0, 0 );
387 p_filter->p_sys->p_rgb16[GREEN_OFFSET + i_index] = RGB2PIXEL( p_filter, 0, pi_gamma[ i_index ], 0 );
388 p_filter->p_sys->p_rgb16[BLUE_OFFSET + i_index] = RGB2PIXEL( p_filter, 0, 0, pi_gamma[ i_index ] );
392 case VLC_CODEC_RGB24:
393 case VLC_CODEC_RGB32:
394 p_filter->p_sys->p_rgb32 = (uint32_t *)p_filter->p_sys->p_base;
395 for( i_index = 0; i_index < RED_MARGIN; i_index++ )
397 p_filter->p_sys->p_rgb32[RED_OFFSET - RED_MARGIN + i_index] = RGB2PIXEL( p_filter, pi_gamma[0], 0, 0 );
398 p_filter->p_sys->p_rgb32[RED_OFFSET + 256 + i_index] = RGB2PIXEL( p_filter, pi_gamma[255], 0, 0 );
400 for( i_index = 0; i_index < GREEN_MARGIN; i_index++ )
402 p_filter->p_sys->p_rgb32[GREEN_OFFSET - GREEN_MARGIN + i_index] = RGB2PIXEL( p_filter, 0, pi_gamma[0], 0 );
403 p_filter->p_sys->p_rgb32[GREEN_OFFSET + 256 + i_index] = RGB2PIXEL( p_filter, 0, pi_gamma[255], 0 );
405 for( i_index = 0; i_index < BLUE_MARGIN; i_index++ )
407 p_filter->p_sys->p_rgb32[BLUE_OFFSET - BLUE_MARGIN + i_index] = RGB2PIXEL( p_filter, 0, 0, pi_gamma[0] );
408 p_filter->p_sys->p_rgb32[BLUE_OFFSET + BLUE_MARGIN + i_index] = RGB2PIXEL( p_filter, 0, 0, pi_gamma[255] );
410 for( i_index = 0; i_index < 256; i_index++ )
412 p_filter->p_sys->p_rgb32[RED_OFFSET + i_index] = RGB2PIXEL( p_filter, pi_gamma[ i_index ], 0, 0 );
413 p_filter->p_sys->p_rgb32[GREEN_OFFSET + i_index] = RGB2PIXEL( p_filter, 0, pi_gamma[ i_index ], 0 );
414 p_filter->p_sys->p_rgb32[BLUE_OFFSET + i_index] = RGB2PIXEL( p_filter, 0, 0, pi_gamma[ i_index ] );
420 static void Set8bppPalette( filter_t *p_filter, uint8_t *p_rgb8 )
422 #define CLIP( x ) ( ((x < 0) ? 0 : (x > 255) ? 255 : x) << 8 )
427 uint16_t *p_cmap_r = p_filter->p_sys->p_rgb_r;
428 uint16_t *p_cmap_g = p_filter->p_sys->p_rgb_g;
429 uint16_t *p_cmap_b = p_filter->p_sys->p_rgb_b;
431 unsigned char p_lookup[PALETTE_TABLE_SIZE];
433 /* This loop calculates the intersection of an YUV box and the RGB cube. */
434 for ( y = 0; y <= 256; y += 16, i += 128 - 81 )
436 for ( u = 0; u <= 256; u += 32 )
438 for ( v = 0; v <= 256; v += 32 )
440 r = y + ( (V_RED_COEF*(v-128)) >> SHIFT );
441 g = y + ( (U_GREEN_COEF*(u-128)
442 + V_GREEN_COEF*(v-128)) >> SHIFT );
443 b = y + ( (U_BLUE_COEF*(u-128)) >> SHIFT );
445 if( r >= 0x00 && g >= 0x00 && b >= 0x00
446 && r <= 0xff && g <= 0xff && b <= 0xff )
448 /* This one should never happen unless someone
449 * fscked up my code */
452 msg_Err( p_filter, "no colors left in palette" );
456 /* Clip the colors */
457 p_cmap_r[ j ] = CLIP( r );
458 p_cmap_g[ j ] = CLIP( g );
459 p_cmap_b[ j ] = CLIP( b );
462 printf("+++Alloc RGB cmap %d (%d, %d, %d)\n", j,
463 p_cmap_r[ j ] >>8, p_cmap_g[ j ] >>8,
481 /* The colors have been allocated, we can set the palette */
482 /* FIXME FIXME FIXME FIXME FIXME FIXME FIXME FIXME FIXME
483 p_filter->fmt_out.video.pf_setpalette( p_filter, p_cmap_r, p_cmap_g, p_cmap_b );*/
486 /* There will eventually be a way to know which colors
487 * couldn't be allocated and try to find a replacement */
488 p_vout->i_white_pixel = 0xff;
489 p_vout->i_black_pixel = 0x00;
490 p_vout->i_gray_pixel = 0x44;
491 p_vout->i_blue_pixel = 0x3b;
494 /* This loop allocates colors that got outside the RGB cube */
495 for ( i = 0, y = 0; y <= 256; y += 16, i += 128 - 81 )
497 for ( u = 0; u <= 256; u += 32 )
499 for ( v = 0; v <= 256; v += 32, i++ )
501 int u2, v2, dist, mindist = 100000000;
503 if( p_lookup[ i ] || y == 0 )
509 for( u2 = 0; u2 <= 256; u2 += 32 )
511 for( v2 = 0; v2 <= 256; v2 += 32 )
513 j = ((y>>4)<<7) + (u2>>5)*9 + (v2>>5);
514 dist = (u-u2)*(u-u2) + (v-v2)*(v-v2);
516 /* Find the nearest color */
517 if( p_lookup[ j ] && dist < mindist )
519 p_rgb8[ i ] = p_rgb8[ j ];
525 /* Find the nearest color */
526 if( p_lookup[ j ] && dist + 128 < mindist )
528 p_rgb8[ i ] = p_rgb8[ j ];
529 mindist = dist + 128;