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 * chroma_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 E_(I420_RGB8) ( vout_thread_t *, picture_t *, picture_t * );
60 void E_(I420_RGB16_dither) ( vout_thread_t *, picture_t *, picture_t * );
62 void E_(I420_RGB16) ( vout_thread_t *, picture_t *, picture_t * );
63 void E_(I420_RGB32) ( vout_thread_t *, picture_t *, picture_t * );
65 /*****************************************************************************
66 * CONVERT_*_PIXEL: pixel conversion macros
67 *****************************************************************************
68 * These conversion routines are used by YUV conversion functions.
69 * conversion are made from p_y, p_u, p_v, which are modified, to p_buffer,
70 * which is also modified. CONVERT_4YUV_PIXEL is used for 8bpp dithering,
71 * CONVERT_4YUV_PIXEL_SCALE does the same but also scales the output.
72 *****************************************************************************/
73 #define CONVERT_Y_PIXEL( BPP ) \
74 /* Only Y sample is present */ \
75 p_ybase = p_yuv + *p_y++; \
76 *p_buffer++ = p_ybase[RED_OFFSET-((V_RED_COEF*128)>>SHIFT) + i_red] | \
77 p_ybase[GREEN_OFFSET-(((U_GREEN_COEF+V_GREEN_COEF)*128)>>SHIFT) \
78 + i_green ] | p_ybase[BLUE_OFFSET-((U_BLUE_COEF*128)>>SHIFT) + i_blue];
80 #define CONVERT_YUV_PIXEL( BPP ) \
81 /* Y, U and V samples are present */ \
84 i_red = (V_RED_COEF * i_vval) >> SHIFT; \
85 i_green = (U_GREEN_COEF * i_uval + V_GREEN_COEF * i_vval) >> SHIFT; \
86 i_blue = (U_BLUE_COEF * i_uval) >> SHIFT; \
87 CONVERT_Y_PIXEL( BPP ) \
89 #define CONVERT_Y_PIXEL_DITHER( BPP ) \
90 /* Only Y sample is present */ \
91 p_ybase = p_yuv + *p_y++; \
92 *p_buffer++ = p_ybase[RED_OFFSET-((V_RED_COEF*128+p_dither[i_real_y])>>SHIFT) + i_red] | \
93 p_ybase[GREEN_OFFSET-(((U_GREEN_COEF+V_GREEN_COEF)*128+p_dither[i_real_y])>>SHIFT) \
94 + i_green ] | p_ybase[BLUE_OFFSET-((U_BLUE_COEF*128+p_dither[i_real_y])>>SHIFT) + i_blue];
96 #define CONVERT_YUV_PIXEL_DITHER( BPP ) \
97 /* Y, U and V samples are present */ \
100 i_red = (V_RED_COEF * i_vval) >> SHIFT; \
101 i_green = (U_GREEN_COEF * i_uval + V_GREEN_COEF * i_vval) >> SHIFT; \
102 i_blue = (U_BLUE_COEF * i_uval) >> SHIFT; \
103 CONVERT_Y_PIXEL_DITHER( BPP ) \
105 #define CONVERT_4YUV_PIXEL( CHROMA ) \
106 *p_pic++ = p_lookup[ \
107 (((*p_y++ + dither10[i_real_y]) >> 4) << 7) \
108 + ((*p_u + dither20[i_real_y]) >> 5) * 9 \
109 + ((*p_v + dither20[i_real_y]) >> 5) ]; \
110 *p_pic++ = p_lookup[ \
111 (((*p_y++ + dither11[i_real_y]) >> 4) << 7) \
112 + ((*p_u++ + dither21[i_real_y]) >> 5) * 9 \
113 + ((*p_v++ + dither21[i_real_y]) >> 5) ]; \
114 *p_pic++ = p_lookup[ \
115 (((*p_y++ + dither12[i_real_y]) >> 4) << 7) \
116 + ((*p_u + dither22[i_real_y]) >> 5) * 9 \
117 + ((*p_v + dither22[i_real_y]) >> 5) ]; \
118 *p_pic++ = p_lookup[ \
119 (((*p_y++ + dither13[i_real_y]) >> 4) << 7) \
120 + ((*p_u++ + dither23[i_real_y]) >> 5) * 9 \
121 + ((*p_v++ + dither23[i_real_y]) >> 5) ]; \
123 #define CONVERT_4YUV_PIXEL_SCALE( CHROMA ) \
124 *p_pic++ = p_lookup[ \
125 ( ((*p_y + dither10[i_real_y]) >> 4) << 7) \
126 + ((*p_u + dither20[i_real_y]) >> 5) * 9 \
127 + ((*p_v + dither20[i_real_y]) >> 5) ]; \
128 p_y += *p_offset++; \
130 p_v += *p_offset++; \
131 *p_pic++ = p_lookup[ \
132 ( ((*p_y + dither11[i_real_y]) >> 4) << 7) \
133 + ((*p_u + dither21[i_real_y]) >> 5) * 9 \
134 + ((*p_v + dither21[i_real_y]) >> 5) ]; \
135 p_y += *p_offset++; \
137 p_v += *p_offset++; \
138 *p_pic++ = p_lookup[ \
139 ( ((*p_y + dither12[i_real_y]) >> 4) << 7) \
140 + ((*p_u + dither22[i_real_y]) >> 5) * 9 \
141 + ((*p_v + dither22[i_real_y]) >> 5) ]; \
142 p_y += *p_offset++; \
144 p_v += *p_offset++; \
145 *p_pic++ = p_lookup[ \
146 ( ((*p_y + dither13[i_real_y]) >> 4) << 7) \
147 + ((*p_u + dither23[i_real_y]) >> 5) * 9 \
148 + ((*p_v + dither23[i_real_y]) >> 5) ]; \
149 p_y += *p_offset++; \
151 p_v += *p_offset++; \
153 /*****************************************************************************
154 * SCALE_WIDTH: scale a line horizontally
155 *****************************************************************************
156 * This macro scales a line using rendering buffer and offset array. It works
157 * for 1, 2 and 4 Bpp.
158 *****************************************************************************/
159 #define SCALE_WIDTH \
162 /* Horizontal scaling, conversion has been done to buffer. \
163 * Rewind buffer and offset, then copy and scale line */ \
164 p_buffer = p_buffer_start; \
165 p_offset = p_offset_start; \
166 for( i_x = p_vout->output.i_width / 16; i_x--; ) \
168 *p_pic++ = *p_buffer; p_buffer += *p_offset++; \
169 *p_pic++ = *p_buffer; p_buffer += *p_offset++; \
170 *p_pic++ = *p_buffer; p_buffer += *p_offset++; \
171 *p_pic++ = *p_buffer; p_buffer += *p_offset++; \
172 *p_pic++ = *p_buffer; p_buffer += *p_offset++; \
173 *p_pic++ = *p_buffer; p_buffer += *p_offset++; \
174 *p_pic++ = *p_buffer; p_buffer += *p_offset++; \
175 *p_pic++ = *p_buffer; p_buffer += *p_offset++; \
176 *p_pic++ = *p_buffer; p_buffer += *p_offset++; \
177 *p_pic++ = *p_buffer; p_buffer += *p_offset++; \
178 *p_pic++ = *p_buffer; p_buffer += *p_offset++; \
179 *p_pic++ = *p_buffer; p_buffer += *p_offset++; \
180 *p_pic++ = *p_buffer; p_buffer += *p_offset++; \
181 *p_pic++ = *p_buffer; p_buffer += *p_offset++; \
182 *p_pic++ = *p_buffer; p_buffer += *p_offset++; \
183 *p_pic++ = *p_buffer; p_buffer += *p_offset++; \
185 for( i_x = p_vout->output.i_width & 15; i_x--; ) \
187 *p_pic++ = *p_buffer; p_buffer += *p_offset++; \
189 p_pic = (void*)((uint8_t*)p_pic + i_right_margin ); \
193 /* No scaling, conversion has been done directly in picture memory. \
194 * Increment of picture pointer to end of line is still needed */ \
195 p_pic = (void*)((uint8_t*)p_pic + p_dest->p->i_pitch ); \
198 /*****************************************************************************
199 * SCALE_WIDTH_DITHER: scale a line horizontally for dithered 8 bpp
200 *****************************************************************************
201 * This macro scales a line using an offset array.
202 *****************************************************************************/
203 #define SCALE_WIDTH_DITHER( CHROMA ) \
206 /* Horizontal scaling - we can't use a buffer due to dithering */ \
207 p_offset = p_offset_start; \
208 for( i_x = p_vout->output.i_width / 16; i_x--; ) \
210 CONVERT_4YUV_PIXEL_SCALE( CHROMA ) \
211 CONVERT_4YUV_PIXEL_SCALE( CHROMA ) \
212 CONVERT_4YUV_PIXEL_SCALE( CHROMA ) \
213 CONVERT_4YUV_PIXEL_SCALE( CHROMA ) \
218 for( i_x = p_vout->render.i_width / 16; i_x--; ) \
220 CONVERT_4YUV_PIXEL( CHROMA ) \
221 CONVERT_4YUV_PIXEL( CHROMA ) \
222 CONVERT_4YUV_PIXEL( CHROMA ) \
223 CONVERT_4YUV_PIXEL( CHROMA ) \
226 /* Increment of picture pointer to end of line is still needed */ \
227 p_pic = (void*)((uint8_t*)p_pic + i_right_margin ); \
229 /* Increment the Y coordinate in the matrix, modulo 4 */ \
230 i_real_y = (i_real_y + 1) & 0x3; \
232 /*****************************************************************************
233 * SCALE_HEIGHT: handle vertical scaling
234 *****************************************************************************
235 * This macro handle vertical scaling for a picture. CHROMA may be 420, 422 or
236 * 444 for RGB conversion, or 400 for gray conversion. It works for 1, 2, 3
238 *****************************************************************************/
239 #define SCALE_HEIGHT( CHROMA, BPP ) \
240 /* If line is odd, rewind 4:2:0 U and V samples */ \
241 if( ((CHROMA == 420) || (CHROMA == 422)) && !(i_y & 0x1) ) \
243 p_u -= i_chroma_width; \
244 p_v -= i_chroma_width; \
248 * Handle vertical scaling. The current line can be copied or next one \
253 case -1: /* vertical scaling factor is < 1 */ \
254 while( (i_scale_count -= p_vout->output.i_height) > 0 ) \
256 /* Height reduction: skip next source line */ \
257 p_y += p_vout->render.i_width; \
259 if( (CHROMA == 420) || (CHROMA == 422) ) \
263 p_u += i_chroma_width; \
264 p_v += i_chroma_width; \
267 else if( CHROMA == 444 ) \
269 p_u += p_vout->render.i_width; \
270 p_v += p_vout->render.i_width; \
273 i_scale_count += p_vout->render.i_height; \
275 case 1: /* vertical scaling factor is > 1 */ \
276 while( (i_scale_count -= p_vout->render.i_height) > 0 ) \
278 /* Height increment: copy previous picture line */ \
279 p_vout->p_vlc->pf_memcpy( p_pic, p_pic_start, \
280 p_vout->output.i_width * BPP ); \
281 p_pic = (void*)((uint8_t*)p_pic + p_dest->p->i_pitch ); \
283 i_scale_count += p_vout->output.i_height; \
287 /*****************************************************************************
288 * SCALE_HEIGHT_DITHER: handle vertical scaling for dithered 8 bpp
289 *****************************************************************************
290 * This macro handles vertical scaling for a picture. CHROMA may be 420,
291 * 422 or 444 for RGB conversion, or 400 for gray conversion.
292 *****************************************************************************/
293 #define SCALE_HEIGHT_DITHER( CHROMA ) \
295 /* If line is odd, rewind 4:2:0 U and V samples */ \
296 if( ((CHROMA == 420) || (CHROMA == 422)) && !(i_y & 0x1) ) \
298 p_u -= i_chroma_width; \
299 p_v -= i_chroma_width; \
303 * Handle vertical scaling. The current line can be copied or next one \
309 case -1: /* vertical scaling factor is < 1 */ \
310 while( (i_scale_count -= p_vout->output.i_height) > 0 ) \
312 /* Height reduction: skip next source line */ \
313 p_y += p_vout->render.i_width; \
315 if( (CHROMA == 420) || (CHROMA == 422) ) \
319 p_u += i_chroma_width; \
320 p_v += i_chroma_width; \
323 else if( CHROMA == 444 ) \
325 p_u += p_vout->render.i_width; \
326 p_v += p_vout->render.i_width; \
329 i_scale_count += p_vout->render.i_height; \
331 case 1: /* vertical scaling factor is > 1 */ \
332 while( (i_scale_count -= p_vout->render.i_height) > 0 ) \
334 p_y -= p_vout->render.i_width; \
335 p_u -= i_chroma_width; \
336 p_v -= i_chroma_width; \
337 SCALE_WIDTH_DITHER( CHROMA ); \
339 i_scale_count += p_vout->output.i_height; \