d09efac0f2
git-svn-id: svn://svn.rockbox.org/rockbox/trunk@11864 a1c6a512-1295-4272-9138-f99709370657
233 lines
7 KiB
C
233 lines
7 KiB
C
/*
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* video_out_null.c
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* Copyright (C) 2000-2003 Michel Lespinasse <walken@zoy.org>
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* Copyright (C) 1999-2000 Aaron Holtzman <aholtzma@ess.engr.uvic.ca>
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*
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* This file is part of mpeg2dec, a free MPEG-2 video stream decoder.
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* See http://libmpeg2.sourceforge.net/ for updates.
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*
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* mpeg2dec is free software; you can redistribute it and/or modify
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* it under the terms of the GNU General Public License as published by
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* the Free Software Foundation; either version 2 of the License, or
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* (at your option) any later version.
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*
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* mpeg2dec is distributed in the hope that it will be useful,
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* but WITHOUT ANY WARRANTY; without even the implied warranty of
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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* GNU General Public License for more details.
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*
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* You should have received a copy of the GNU General Public License
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* along with this program; if not, write to the Free Software
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* Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
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*/
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#include "mpeg2dec_config.h"
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#include "plugin.h"
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extern struct plugin_api* rb;
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#include "mpeg2.h"
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#include "video_out.h"
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#define CSUB_X 2
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#define CSUB_Y 2
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static int image_width;
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static int image_height;
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static int image_chroma_x;
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static int image_chroma_y;
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static int output_x;
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static int output_y;
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static int output_width;
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static int output_height;
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#ifdef SIMULATOR
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#define RYFAC (31*257)
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#define GYFAC (63*257)
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#define BYFAC (31*257)
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#define RVFAC 11170 /* 31 * 257 * 1.402 */
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#define GVFAC (-11563) /* 63 * 257 * -0.714136 */
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#define GUFAC (-5572) /* 63 * 257 * -0.344136 */
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#define BUFAC 14118 /* 31 * 257 * 1.772 */
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#define ROUNDOFFS (127*257)
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/* Draw a partial YUV colour bitmap - taken from the Rockbox JPEG viewer */
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static void yuv_bitmap_part(unsigned char * const src[3],
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int src_x, int src_y, int stride,
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int x, int y, int width, int height)
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{
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fb_data *dst, *dst_end;
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/* nothing to draw? */
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if ((width <= 0) || (height <= 0) || (x >= LCD_WIDTH) || (y >= LCD_HEIGHT)
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|| (x + width <= 0) || (y + height <= 0))
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return;
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/* clipping */
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if (x < 0)
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{
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width += x;
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src_x -= x;
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x = 0;
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}
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if (y < 0)
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{
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height += y;
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src_y -= y;
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y = 0;
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}
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if (x + width > LCD_WIDTH)
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width = LCD_WIDTH - x;
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if (y + height > LCD_HEIGHT)
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height = LCD_HEIGHT - y;
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dst = rb->lcd_framebuffer + LCD_WIDTH * y + x;
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dst_end = dst + LCD_WIDTH * height;
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do
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{
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fb_data *dst_row = dst;
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fb_data *row_end = dst_row + width;
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const unsigned char *ysrc = src[0] + stride * src_y + src_x;
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int y, u, v;
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int red, green, blue;
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unsigned rbits, gbits, bbits;
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if (CSUB_Y) /* colour */
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{
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/* upsampling, YUV->RGB conversion and reduction to RGB565 in one go */
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const unsigned char *usrc = src[1] + (stride/CSUB_X) * (src_y/CSUB_Y)
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+ (src_x/CSUB_X);
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const unsigned char *vsrc = src[2] + (stride/CSUB_X) * (src_y/CSUB_Y)
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+ (src_x/CSUB_X);
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int xphase = src_x % CSUB_X;
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int rc, gc, bc;
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u = *usrc++ - 128;
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v = *vsrc++ - 128;
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rc = RVFAC * v + ROUNDOFFS;
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gc = GVFAC * v + GUFAC * u + ROUNDOFFS;
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bc = BUFAC * u + ROUNDOFFS;
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do
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{
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y = *ysrc++;
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red = RYFAC * y + rc;
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green = GYFAC * y + gc;
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blue = BYFAC * y + bc;
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if ((unsigned)red > (RYFAC*255+ROUNDOFFS))
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{
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if (red < 0)
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red = 0;
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else
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red = (RYFAC*255+ROUNDOFFS);
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}
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if ((unsigned)green > (GYFAC*255+ROUNDOFFS))
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{
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if (green < 0)
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green = 0;
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else
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green = (GYFAC*255+ROUNDOFFS);
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}
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if ((unsigned)blue > (BYFAC*255+ROUNDOFFS))
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{
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if (blue < 0)
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blue = 0;
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else
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blue = (BYFAC*255+ROUNDOFFS);
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}
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rbits = ((unsigned)red) >> 16 ;
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gbits = ((unsigned)green) >> 16 ;
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bbits = ((unsigned)blue) >> 16 ;
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#if LCD_PIXELFORMAT == RGB565
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*dst_row++ = (rbits << 11) | (gbits << 5) | bbits;
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#elif LCD_PIXELFORMAT == RGB565SWAPPED
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*dst_row++ = swap16((rbits << 11) | (gbits << 5) | bbits);
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#endif
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if (++xphase >= CSUB_X)
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{
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u = *usrc++ - 128;
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v = *vsrc++ - 128;
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rc = RVFAC * v + ROUNDOFFS;
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gc = GVFAC * v + GUFAC * u + ROUNDOFFS;
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bc = BUFAC * u + ROUNDOFFS;
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xphase = 0;
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}
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}
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while (dst_row < row_end);
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}
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else /* monochrome */
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{
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do
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{
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y = *ysrc++;
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red = RYFAC * y + ROUNDOFFS; /* blue == red */
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green = GYFAC * y + ROUNDOFFS;
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rbits = ((unsigned)red) >> 16;
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gbits = ((unsigned)green) >> 16;
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#if LCD_PIXELFORMAT == RGB565
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*dst_row++ = (rbits << 11) | (gbits << 5) | rbits;
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#elif LCD_PIXELFORMAT == RGB565SWAPPED
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*dst_row++ = swap16((rbits << 11) | (gbits << 5) | rbits);
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#endif
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}
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while (dst_row < row_end);
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}
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src_y++;
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dst += LCD_WIDTH;
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}
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while (dst < dst_end);
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}
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#endif
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void vo_draw_frame (uint8_t * const * buf)
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{
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#ifdef SIMULATOR
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yuv_bitmap_part(buf,0,0,image_width,
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output_x,output_y,output_width,output_height);
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rb->lcd_update_rect(output_x,output_y,output_width,output_height);
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#else
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rb->lcd_yuv_blit(buf,
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0,0,image_width,
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output_x,output_y,output_width,output_height);
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#endif
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}
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#if LCD_WIDTH >= LCD_HEIGHT
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#define SCREEN_WIDTH LCD_WIDTH
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#define SCREEN_HEIGHT LCD_HEIGHT
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#else /* Assume the screen is rotates on portraid LCDs */
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#define SCREEN_WIDTH LCD_HEIGHT
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#define SCREEN_HEIGHT LCD_WIDTH
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#endif
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void vo_setup(unsigned int width, unsigned int height,
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unsigned int chroma_width, unsigned int chroma_height)
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{
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image_width=width;
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image_height=height;
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image_chroma_x=image_width/chroma_width;
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image_chroma_y=image_height/chroma_height;
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if (image_width >= SCREEN_WIDTH) {
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output_width = SCREEN_WIDTH;
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output_x = 0;
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} else {
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output_width = image_width;
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output_x = (SCREEN_WIDTH-image_width)/2;
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}
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if (image_height >= SCREEN_HEIGHT) {
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output_height = SCREEN_HEIGHT;
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output_y = 0;
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} else {
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output_height = image_height;
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output_y = (SCREEN_HEIGHT-image_height)/2;
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}
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}
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