apps/plugins/mpegplayer/video_out_rockbox.c

   1 /*
   2  * video_out_null.c
   3  * Copyright (C) 2000-2003 Michel Lespinasse <walken@zoy.org>
   4  * Copyright (C) 1999-2000 Aaron Holtzman <aholtzma@ess.engr.uvic.ca>
   5  *
   6  * This file is part of mpeg2dec, a free MPEG-2 video stream decoder.
   7  * See http://libmpeg2.sourceforge.net/ for updates.
   8  *
   9  * mpeg2dec 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.
  13  *
  14  * mpeg2dec 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.
  18  *
  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., 59 Temple Place, Suite 330, Boston, MA  02111-1307  USA
  22  */
  23
  24 #include "mpeg2dec_config.h"
  25
  26 #include "plugin.h"
  27 #include "gray.h"
  28
  29 extern struct plugin_api* rb;
  30
  31 #include "mpeg2.h"
  32 #include "video_out.h"
  33
  34 #define CSUB_X 2
  35 #define CSUB_Y 2
  36
  37 static int image_width;
  38 static int image_height;
  39 static int image_chroma_x;
  40 static int image_chroma_y;
  41 static int output_x;
  42 static int output_y;
  43 static int output_width;
  44 static int output_height;
  45
  46 #if defined(SIMULATOR) && defined(HAVE_LCD_COLOR)
  47
  48 #define RYFAC (31*257)
  49 #define GYFAC (63*257)
  50 #define BYFAC (31*257)
  51 #define RVFAC 11170     /* 31 * 257 *  1.402    */
  52 #define GVFAC (-11563)  /* 63 * 257 * -0.714136 */
  53 #define GUFAC (-5572)   /* 63 * 257 * -0.344136 */
  54 #define BUFAC 14118     /* 31 * 257 *  1.772    */
  55
  56 #define ROUNDOFFS (127*257)
  57
  58 /* Draw a partial YUV colour bitmap - taken from the Rockbox JPEG viewer */
  59 static void yuv_bitmap_part(unsigned char * const src[3],
  60                             int src_x, int src_y, int stride,
  61                             int x, int y, int width, int height)
  62 {
  63     fb_data *dst, *dst_end;
  64
  65     /* nothing to draw? */
  66     if ((width <= 0) || (height <= 0) || (x >= LCD_WIDTH) || (y >= LCD_HEIGHT)
  67         || (x + width <= 0) || (y + height <= 0))
  68         return;
  69
  70     /* clipping */
  71     if (x < 0)
  72     {
  73         width += x;
  74         src_x -= x;
  75         x = 0;
  76     }
  77     if (y < 0)
  78     {
  79         height += y;
  80         src_y -= y;
  81         y = 0;
  82     }
  83     if (x + width > LCD_WIDTH)
  84         width = LCD_WIDTH - x;
  85     if (y + height > LCD_HEIGHT)
  86         height = LCD_HEIGHT - y;
  87
  88     dst = rb->lcd_framebuffer + LCD_WIDTH * y + x;
  89     dst_end = dst + LCD_WIDTH * height;
  90
  91     do
  92     {
  93         fb_data *dst_row = dst;
  94         fb_data *row_end = dst_row + width;
  95         const unsigned char *ysrc = src[0] + stride * src_y + src_x;
  96         int y, u, v;
  97         int red, green, blue;
  98         unsigned rbits, gbits, bbits;
  99
 100         if (CSUB_Y) /* colour */
 101         {
 102             /* upsampling, YUV->RGB conversion and reduction to RGB565 in one go */
 103             const unsigned char *usrc = src[1] + (stride/CSUB_X) * (src_y/CSUB_Y)
 104                                                + (src_x/CSUB_X);
 105             const unsigned char *vsrc = src[2] + (stride/CSUB_X) * (src_y/CSUB_Y)
 106                                                + (src_x/CSUB_X);
 107             int xphase = src_x % CSUB_X;
 108             int rc, gc, bc;
 109
 110             u = *usrc++ - 128;
 111             v = *vsrc++ - 128;
 112             rc = RVFAC * v + ROUNDOFFS;
 113             gc = GVFAC * v + GUFAC * u + ROUNDOFFS;
 114             bc = BUFAC * u + ROUNDOFFS;
 115
 116             do
 117             {
 118                 y = *ysrc++;
 119                 red   = RYFAC * y + rc;
 120                 green = GYFAC * y + gc;
 121                 blue  = BYFAC * y + bc;
 122
 123                 if ((unsigned)red > (RYFAC*255+ROUNDOFFS))
 124                 {
 125                     if (red < 0)
 126                         red = 0;
 127                     else
 128                         red = (RYFAC*255+ROUNDOFFS);
 129                 }
 130                 if ((unsigned)green > (GYFAC*255+ROUNDOFFS))
 131                 {
 132                     if (green < 0)
 133                         green = 0;
 134                     else
 135                         green = (GYFAC*255+ROUNDOFFS);
 136                 }
 137                 if ((unsigned)blue > (BYFAC*255+ROUNDOFFS))
 138                 {
 139                     if (blue < 0)
 140                         blue = 0;
 141                     else
 142                         blue = (BYFAC*255+ROUNDOFFS);
 143                 }
 144                 rbits = ((unsigned)red) >> 16 ;
 145                 gbits = ((unsigned)green) >> 16 ;
 146                 bbits = ((unsigned)blue) >> 16 ;
 147 #if LCD_PIXELFORMAT == RGB565
 148                 *dst_row++ = (rbits << 11) | (gbits << 5) | bbits;
 149 #elif LCD_PIXELFORMAT == RGB565SWAPPED
 150                 *dst_row++ = swap16((rbits << 11) | (gbits << 5) | bbits);
 151 #endif
 152
 153                 if (++xphase >= CSUB_X)
 154                 {
 155                     u = *usrc++ - 128;
 156                     v = *vsrc++ - 128;
 157                     rc = RVFAC * v + ROUNDOFFS;
 158                     gc = GVFAC * v + GUFAC * u + ROUNDOFFS;
 159                     bc = BUFAC * u + ROUNDOFFS;
 160                     xphase = 0;
 161                 }
 162             }
 163             while (dst_row < row_end);
 164         }
 165         else /* monochrome */
 166         {
 167             do
 168             {
 169                 y = *ysrc++;
 170                 red   = RYFAC * y + ROUNDOFFS;  /* blue == red */
 171                 green = GYFAC * y + ROUNDOFFS;
 172                 rbits = ((unsigned)red) >> 16;
 173                 gbits = ((unsigned)green) >> 16;
 174 #if LCD_PIXELFORMAT == RGB565
 175                 *dst_row++ = (rbits << 11) | (gbits << 5) | rbits;
 176 #elif LCD_PIXELFORMAT == RGB565SWAPPED
 177                 *dst_row++ = swap16((rbits << 11) | (gbits << 5) | rbits);
 178 #endif
 179             }
 180             while (dst_row < row_end);
 181         }
 182
 183         src_y++;
 184         dst += LCD_WIDTH;
 185     }
 186     while (dst < dst_end);
 187 }
 188 #endif
 189
 190 void vo_draw_frame (uint8_t * const * buf)
 191 {
 192 #ifdef HAVE_LCD_COLOR
 193 #ifdef SIMULATOR
 194     yuv_bitmap_part(buf,0,0,image_width,
 195                     output_x,output_y,output_width,output_height);
 196     rb->lcd_update_rect(output_x,output_y,output_width,output_height);
 197 #else
 198     rb->lcd_yuv_blit(buf,
 199                     0,0,image_width,
 200                     output_x,output_y,output_width,output_height);
 201 #endif
 202 #else
 203     gray_ub_gray_bitmap_part(buf[0],0,0,image_width,
 204                              output_x,output_y,output_width,output_height);
 205 #endif
 206 }
 207
 208 #if LCD_WIDTH >= LCD_HEIGHT
 209 #define SCREEN_WIDTH LCD_WIDTH
 210 #define SCREEN_HEIGHT LCD_HEIGHT
 211 #else /* Assume the screen is rotates on portraid LCDs */
 212 #define SCREEN_WIDTH LCD_HEIGHT
 213 #define SCREEN_HEIGHT LCD_WIDTH
 214 #endif
 215
 216 void vo_setup(const mpeg2_sequence_t * sequence)
 217 {
 218     image_width=sequence->width;
 219     image_height=sequence->height;
 220     image_chroma_x=image_width/sequence->chroma_width;
 221     image_chroma_y=image_height/sequence->chroma_height;
 222
 223     if (sequence->display_width >= SCREEN_WIDTH) {
 224         output_width = SCREEN_WIDTH;
 225         output_x = 0;
 226     } else {
 227         output_width = sequence->display_width;
 228         output_x = (SCREEN_WIDTH-sequence->display_width)/2;
 229     }
 230
 231     if (sequence->display_height >= SCREEN_HEIGHT) {
 232         output_height = SCREEN_HEIGHT;
 233         output_y = 0;
 234     } else {
 235         output_height = sequence->display_height;
 236         output_y = (SCREEN_HEIGHT-sequence->display_height)/2;
 237     }
 238 }