1 /*****************************************************************************
2 * i420_rgb.h : YUV to bitmap RGB conversion module for vlc
3 *****************************************************************************
4 * Copyright (C) 2000, 2004 the VideoLAN team
7 * Authors: Samuel 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 /** Number of entries in RGB palette/colormap */
25 #define CMAP_RGB2_SIZE 256
28 * filter_sys_t: chroma method descriptor
30 * This structure is part of the chroma transformation descriptor, it
31 * describes the yuv2rgb specific properties.
38 #ifdef MODULE_NAME_IS_i420_rgb
39 /**< Pre-calculated conversion tables */
40 void *p_base; /**< base for all conversion tables */
41 uint8_t *p_rgb8; /**< RGB 8 bits table */
42 uint16_t *p_rgb16; /**< RGB 16 bits table */
43 uint32_t *p_rgb32; /**< RGB 32 bits table */
45 /**< To get RGB value for palette entry i, use (p_rgb_r[i], p_rgb_g[i],
46 p_rgb_b[i]). Note these are 16 bits per pixel. For 8bpp entries,
49 uint16_t p_rgb_r[CMAP_RGB2_SIZE]; /**< Red values of palette */
50 uint16_t p_rgb_g[CMAP_RGB2_SIZE]; /**< Green values of palette */
51 uint16_t p_rgb_b[CMAP_RGB2_SIZE]; /**< Blue values of palette */
55 /*****************************************************************************
57 *****************************************************************************/
58 #ifdef MODULE_NAME_IS_i420_rgb
59 void I420_RGB8 ( filter_t *, picture_t *, picture_t * );
60 void I420_RGB16_dither ( filter_t *, picture_t *, picture_t * );
61 void I420_RGB16 ( filter_t *, picture_t *, picture_t * );
62 void I420_RGB32 ( filter_t *, picture_t *, picture_t * );
63 static picture_t *I420_RGB8_Filter ( filter_t *, picture_t * );
64 static picture_t *I420_RGB16_dither_Filter ( filter_t *, picture_t * );
65 static picture_t *I420_RGB16_Filter ( filter_t *, picture_t * );
66 static picture_t *I420_RGB32_Filter ( filter_t *, picture_t * );
67 #else // if defined(MODULE_NAME_IS_i420_rgb_mmx)
68 void I420_R5G5B5 ( filter_t *, picture_t *, picture_t * );
69 void I420_R5G6B5 ( filter_t *, picture_t *, picture_t * );
70 void I420_A8R8G8B8 ( filter_t *, picture_t *, picture_t * );
71 void I420_R8G8B8A8 ( filter_t *, picture_t *, picture_t * );
72 void I420_B8G8R8A8 ( filter_t *, picture_t *, picture_t * );
73 void I420_A8B8G8R8 ( filter_t *, picture_t *, picture_t * );
74 static picture_t *I420_R5G5B5_Filter ( filter_t *, picture_t * );
75 static picture_t *I420_R5G6B5_Filter ( filter_t *, picture_t * );
76 static picture_t *I420_A8R8G8B8_Filter ( filter_t *, picture_t * );
77 static picture_t *I420_R8G8B8A8_Filter ( filter_t *, picture_t * );
78 static picture_t *I420_B8G8R8A8_Filter ( filter_t *, picture_t * );
79 static picture_t *I420_A8B8G8R8_Filter ( filter_t *, picture_t * );
82 /*****************************************************************************
83 * CONVERT_*_PIXEL: pixel conversion macros
84 *****************************************************************************
85 * These conversion routines are used by YUV conversion functions.
86 * conversion are made from p_y, p_u, p_v, which are modified, to p_buffer,
87 * which is also modified. CONVERT_4YUV_PIXEL is used for 8bpp dithering,
88 * CONVERT_4YUV_PIXEL_SCALE does the same but also scales the output.
89 *****************************************************************************/
90 #define CONVERT_Y_PIXEL( BPP ) \
91 /* Only Y sample is present */ \
92 p_ybase = p_yuv + *p_y++; \
93 *p_buffer++ = p_ybase[RED_OFFSET-((V_RED_COEF*128)>>SHIFT) + i_red] | \
94 p_ybase[GREEN_OFFSET-(((U_GREEN_COEF+V_GREEN_COEF)*128)>>SHIFT) \
95 + i_green ] | p_ybase[BLUE_OFFSET-((U_BLUE_COEF*128)>>SHIFT) + i_blue];
97 #define CONVERT_YUV_PIXEL( BPP ) \
98 /* Y, U and V samples are present */ \
101 i_red = (V_RED_COEF * i_vval) >> SHIFT; \
102 i_green = (U_GREEN_COEF * i_uval + V_GREEN_COEF * i_vval) >> SHIFT; \
103 i_blue = (U_BLUE_COEF * i_uval) >> SHIFT; \
104 CONVERT_Y_PIXEL( BPP ) \
106 #define CONVERT_Y_PIXEL_DITHER( BPP ) \
107 /* Only Y sample is present */ \
108 p_ybase = p_yuv + *p_y++; \
109 *p_buffer++ = p_ybase[RED_OFFSET-((V_RED_COEF*128+p_dither[i_real_y])>>SHIFT) + i_red] | \
110 p_ybase[GREEN_OFFSET-(((U_GREEN_COEF+V_GREEN_COEF)*128+p_dither[i_real_y])>>SHIFT) \
111 + i_green ] | p_ybase[BLUE_OFFSET-((U_BLUE_COEF*128+p_dither[i_real_y])>>SHIFT) + i_blue];
113 #define CONVERT_YUV_PIXEL_DITHER( BPP ) \
114 /* Y, U and V samples are present */ \
117 i_red = (V_RED_COEF * i_vval) >> SHIFT; \
118 i_green = (U_GREEN_COEF * i_uval + V_GREEN_COEF * i_vval) >> SHIFT; \
119 i_blue = (U_BLUE_COEF * i_uval) >> SHIFT; \
120 CONVERT_Y_PIXEL_DITHER( BPP ) \
122 #define CONVERT_4YUV_PIXEL( CHROMA ) \
123 *p_pic++ = p_lookup[ \
124 (((*p_y++ + dither10[i_real_y]) >> 4) << 7) \
125 + ((*p_u + dither20[i_real_y]) >> 5) * 9 \
126 + ((*p_v + dither20[i_real_y]) >> 5) ]; \
127 *p_pic++ = p_lookup[ \
128 (((*p_y++ + dither11[i_real_y]) >> 4) << 7) \
129 + ((*p_u++ + dither21[i_real_y]) >> 5) * 9 \
130 + ((*p_v++ + dither21[i_real_y]) >> 5) ]; \
131 *p_pic++ = p_lookup[ \
132 (((*p_y++ + dither12[i_real_y]) >> 4) << 7) \
133 + ((*p_u + dither22[i_real_y]) >> 5) * 9 \
134 + ((*p_v + dither22[i_real_y]) >> 5) ]; \
135 *p_pic++ = p_lookup[ \
136 (((*p_y++ + dither13[i_real_y]) >> 4) << 7) \
137 + ((*p_u++ + dither23[i_real_y]) >> 5) * 9 \
138 + ((*p_v++ + dither23[i_real_y]) >> 5) ]; \
140 #define CONVERT_4YUV_PIXEL_SCALE( CHROMA ) \
141 *p_pic++ = p_lookup[ \
142 ( ((*p_y + dither10[i_real_y]) >> 4) << 7) \
143 + ((*p_u + dither20[i_real_y]) >> 5) * 9 \
144 + ((*p_v + dither20[i_real_y]) >> 5) ]; \
145 p_y += *p_offset++; \
147 p_v += *p_offset++; \
148 *p_pic++ = p_lookup[ \
149 ( ((*p_y + dither11[i_real_y]) >> 4) << 7) \
150 + ((*p_u + dither21[i_real_y]) >> 5) * 9 \
151 + ((*p_v + dither21[i_real_y]) >> 5) ]; \
152 p_y += *p_offset++; \
154 p_v += *p_offset++; \
155 *p_pic++ = p_lookup[ \
156 ( ((*p_y + dither12[i_real_y]) >> 4) << 7) \
157 + ((*p_u + dither22[i_real_y]) >> 5) * 9 \
158 + ((*p_v + dither22[i_real_y]) >> 5) ]; \
159 p_y += *p_offset++; \
161 p_v += *p_offset++; \
162 *p_pic++ = p_lookup[ \
163 ( ((*p_y + dither13[i_real_y]) >> 4) << 7) \
164 + ((*p_u + dither23[i_real_y]) >> 5) * 9 \
165 + ((*p_v + dither23[i_real_y]) >> 5) ]; \
166 p_y += *p_offset++; \
168 p_v += *p_offset++; \
170 /*****************************************************************************
171 * SCALE_WIDTH: scale a line horizontally
172 *****************************************************************************
173 * This macro scales a line using rendering buffer and offset array. It works
174 * for 1, 2 and 4 Bpp.
175 *****************************************************************************/
176 #define SCALE_WIDTH \
179 /* Horizontal scaling, conversion has been done to buffer. \
180 * Rewind buffer and offset, then copy and scale line */ \
181 p_buffer = p_buffer_start; \
182 p_offset = p_offset_start; \
183 for( i_x = p_filter->fmt_out.video.i_width / 16; i_x--; ) \
185 *p_pic++ = *p_buffer; p_buffer += *p_offset++; \
186 *p_pic++ = *p_buffer; p_buffer += *p_offset++; \
187 *p_pic++ = *p_buffer; p_buffer += *p_offset++; \
188 *p_pic++ = *p_buffer; p_buffer += *p_offset++; \
189 *p_pic++ = *p_buffer; p_buffer += *p_offset++; \
190 *p_pic++ = *p_buffer; p_buffer += *p_offset++; \
191 *p_pic++ = *p_buffer; p_buffer += *p_offset++; \
192 *p_pic++ = *p_buffer; p_buffer += *p_offset++; \
193 *p_pic++ = *p_buffer; p_buffer += *p_offset++; \
194 *p_pic++ = *p_buffer; p_buffer += *p_offset++; \
195 *p_pic++ = *p_buffer; p_buffer += *p_offset++; \
196 *p_pic++ = *p_buffer; p_buffer += *p_offset++; \
197 *p_pic++ = *p_buffer; p_buffer += *p_offset++; \
198 *p_pic++ = *p_buffer; p_buffer += *p_offset++; \
199 *p_pic++ = *p_buffer; p_buffer += *p_offset++; \
200 *p_pic++ = *p_buffer; p_buffer += *p_offset++; \
202 for( i_x = p_filter->fmt_out.video.i_width & 15; i_x--; ) \
204 *p_pic++ = *p_buffer; p_buffer += *p_offset++; \
206 p_pic = (void*)((uint8_t*)p_pic + i_right_margin ); \
210 /* No scaling, conversion has been done directly in picture memory. \
211 * Increment of picture pointer to end of line is still needed */ \
212 p_pic = (void*)((uint8_t*)p_pic + p_dest->p->i_pitch ); \
215 /*****************************************************************************
216 * SCALE_WIDTH_DITHER: scale a line horizontally for dithered 8 bpp
217 *****************************************************************************
218 * This macro scales a line using an offset array.
219 *****************************************************************************/
220 #define SCALE_WIDTH_DITHER( CHROMA ) \
223 /* Horizontal scaling - we can't use a buffer due to dithering */ \
224 p_offset = p_offset_start; \
225 for( i_x = p_filter->fmt_out.video.i_width / 16; i_x--; ) \
227 CONVERT_4YUV_PIXEL_SCALE( CHROMA ) \
228 CONVERT_4YUV_PIXEL_SCALE( CHROMA ) \
229 CONVERT_4YUV_PIXEL_SCALE( CHROMA ) \
230 CONVERT_4YUV_PIXEL_SCALE( CHROMA ) \
235 for( i_x = p_filter->fmt_in.video.i_width / 16; i_x--; ) \
237 CONVERT_4YUV_PIXEL( CHROMA ) \
238 CONVERT_4YUV_PIXEL( CHROMA ) \
239 CONVERT_4YUV_PIXEL( CHROMA ) \
240 CONVERT_4YUV_PIXEL( CHROMA ) \
243 /* Increment of picture pointer to end of line is still needed */ \
244 p_pic = (void*)((uint8_t*)p_pic + i_right_margin ); \
246 /* Increment the Y coordinate in the matrix, modulo 4 */ \
247 i_real_y = (i_real_y + 1) & 0x3; \
249 /*****************************************************************************
250 * SCALE_HEIGHT: handle vertical scaling
251 *****************************************************************************
252 * This macro handle vertical scaling for a picture. CHROMA may be 420, 422 or
253 * 444 for RGB conversion, or 400 for gray conversion. It works for 1, 2, 3
255 *****************************************************************************/
256 #define SCALE_HEIGHT( CHROMA, BPP ) \
257 /* If line is odd, rewind 4:2:0 U and V samples */ \
258 if( ((CHROMA == 420) || (CHROMA == 422)) && !(i_y & 0x1) ) \
260 p_u -= i_chroma_width; \
261 p_v -= i_chroma_width; \
265 * Handle vertical scaling. The current line can be copied or next one \
270 case -1: /* vertical scaling factor is < 1 */ \
271 while( (i_scale_count -= p_filter->fmt_out.video.i_height) > 0 ) \
273 /* Height reduction: skip next source line */ \
274 p_y += p_filter->fmt_in.video.i_width; \
276 if( (CHROMA == 420) || (CHROMA == 422) ) \
280 p_u += i_chroma_width; \
281 p_v += i_chroma_width; \
284 else if( CHROMA == 444 ) \
286 p_u += p_filter->fmt_in.video.i_width; \
287 p_v += p_filter->fmt_in.video.i_width; \
290 i_scale_count += p_filter->fmt_in.video.i_height; \
292 case 1: /* vertical scaling factor is > 1 */ \
293 while( (i_scale_count -= p_filter->fmt_in.video.i_height) > 0 ) \
295 /* Height increment: copy previous picture line */ \
296 vlc_memcpy( p_pic, p_pic_start, p_filter->fmt_out.video.i_width * BPP ); \
297 p_pic = (void*)((uint8_t*)p_pic + p_dest->p->i_pitch ); \
299 i_scale_count += p_filter->fmt_out.video.i_height; \
303 /*****************************************************************************
304 * SCALE_HEIGHT_DITHER: handle vertical scaling for dithered 8 bpp
305 *****************************************************************************
306 * This macro handles vertical scaling for a picture. CHROMA may be 420,
307 * 422 or 444 for RGB conversion, or 400 for gray conversion.
308 *****************************************************************************/
309 #define SCALE_HEIGHT_DITHER( CHROMA ) \
311 /* If line is odd, rewind 4:2:0 U and V samples */ \
312 if( ((CHROMA == 420) || (CHROMA == 422)) && !(i_y & 0x1) ) \
314 p_u -= i_chroma_width; \
315 p_v -= i_chroma_width; \
319 * Handle vertical scaling. The current line can be copied or next one \
325 case -1: /* vertical scaling factor is < 1 */ \
326 while( (i_scale_count -= p_filter->fmt_out.video.i_height) > 0 ) \
328 /* Height reduction: skip next source line */ \
329 p_y += p_filter->fmt_in.video.i_width; \
331 if( (CHROMA == 420) || (CHROMA == 422) ) \
335 p_u += i_chroma_width; \
336 p_v += i_chroma_width; \
339 else if( CHROMA == 444 ) \
341 p_u += p_filter->fmt_in.video.i_width; \
342 p_v += p_filter->fmt_in.video.i_width; \
345 i_scale_count += p_filter->fmt_in.video.i_height; \
347 case 1: /* vertical scaling factor is > 1 */ \
348 while( (i_scale_count -= p_filter->fmt_in.video.i_height) > 0 ) \
350 p_y -= p_filter->fmt_in.video.i_width; \
351 p_u -= i_chroma_width; \
352 p_v -= i_chroma_width; \
353 SCALE_WIDTH_DITHER( CHROMA ); \
355 i_scale_count += p_filter->fmt_out.video.i_height; \