72e6dd5e0c
git-svn-id: svn://svn.rockbox.org/rockbox/trunk@13254 a1c6a512-1295-4272-9138-f99709370657
289 lines
7.5 KiB
C
289 lines
7.5 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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#include "gray.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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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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#if defined(SIMULATOR) && defined(HAVE_LCD_COLOR)
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/**
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* |R| |1.000000 -0.000001 1.402000| |Y'|
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* |G| = |1.000000 -0.334136 -0.714136| |Pb|
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* |B| |1.000000 1.772000 0.000000| |Pr|
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* Scaled, normalized, rounded and tweaked to yield RGB 565:
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* |R| |74 0 101| |Y' - 16| >> 9
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* |G| = |74 -24 -51| |Cb - 128| >> 8
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* |B| |74 128 0| |Cr - 128| >> 9
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*/
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#define YFAC (74)
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#define RVFAC (101)
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#define GUFAC (-24)
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#define GVFAC (-51)
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#define BUFAC (128)
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static inline int clamp(int val, int min, int max)
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{
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if (val < min)
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val = min;
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else if (val > max)
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val = max;
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return val;
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}
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/* Draw a partial YUV colour bitmap - similiar behavior to lcd_yuv_blit
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in the core */
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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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const unsigned char *ysrc, *usrc, *vsrc;
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fb_data *dst, *row_end;
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off_t z;
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/* width and height must be >= 2 and an even number */
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width &= ~1;
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height >>= 1;
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#if LCD_WIDTH >= LCD_HEIGHT
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dst = rb->lcd_framebuffer + LCD_WIDTH * y + x;
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row_end = dst + width;
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#else
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dst = rb->lcd_framebuffer + x * LCD_WIDTH + (LCD_WIDTH - y) - 1;
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row_end = dst + LCD_WIDTH * width;
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#endif
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z = stride * src_y;
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ysrc = src[0] + z + src_x;
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usrc = src[1] + (z >> 2) + (src_x >> 1);
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vsrc = src[2] + (usrc - src[1]);
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/* stride => amount to jump from end of last row to start of next */
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stride -= width;
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/* upsampling, YUV->RGB conversion and reduction to RGB565 in one go */
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do
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{
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do
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{
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int y, cb, cr, rv, guv, bu, r, g, b;
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y = YFAC*(*ysrc++ - 16);
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cb = *usrc++ - 128;
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cr = *vsrc++ - 128;
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rv = RVFAC*cr;
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guv = GUFAC*cb + GVFAC*cr;
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bu = BUFAC*cb;
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r = y + rv;
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g = y + guv;
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b = y + bu;
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if ((unsigned)(r | g | b) > 64*256-1)
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{
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r = clamp(r, 0, 64*256-1);
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g = clamp(g, 0, 64*256-1);
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b = clamp(b, 0, 64*256-1);
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}
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*dst = LCD_RGBPACK_LCD(r >> 9, g >> 8, b >> 9);
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#if LCD_WIDTH >= LCD_HEIGHT
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dst++;
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#else
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dst += LCD_WIDTH;
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#endif
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y = YFAC*(*ysrc++ - 16);
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r = y + rv;
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g = y + guv;
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b = y + bu;
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if ((unsigned)(r | g | b) > 64*256-1)
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{
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r = clamp(r, 0, 64*256-1);
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g = clamp(g, 0, 64*256-1);
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b = clamp(b, 0, 64*256-1);
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}
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*dst = LCD_RGBPACK_LCD(r >> 9, g >> 8, b >> 9);
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#if LCD_WIDTH >= LCD_HEIGHT
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dst++;
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#else
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dst += LCD_WIDTH;
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#endif
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}
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while (dst < row_end);
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ysrc += stride;
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usrc -= width >> 1;
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vsrc -= width >> 1;
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#if LCD_WIDTH >= LCD_HEIGHT
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row_end += LCD_WIDTH;
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dst += LCD_WIDTH - width;
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#else
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row_end -= 1;
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dst -= LCD_WIDTH*width + 1;
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#endif
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do
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{
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int y, cb, cr, rv, guv, bu, r, g, b;
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y = YFAC*(*ysrc++ - 16);
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cb = *usrc++ - 128;
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cr = *vsrc++ - 128;
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rv = RVFAC*cr;
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guv = GUFAC*cb + GVFAC*cr;
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bu = BUFAC*cb;
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r = y + rv;
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g = y + guv;
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b = y + bu;
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if ((unsigned)(r | g | b) > 64*256-1)
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{
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r = clamp(r, 0, 64*256-1);
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g = clamp(g, 0, 64*256-1);
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b = clamp(b, 0, 64*256-1);
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}
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*dst = LCD_RGBPACK_LCD(r >> 9, g >> 8, b >> 9);
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#if LCD_WIDTH >= LCD_HEIGHT
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dst++;
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#else
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dst += LCD_WIDTH;
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#endif
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y = YFAC*(*ysrc++ - 16);
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r = y + rv;
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g = y + guv;
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b = y + bu;
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if ((unsigned)(r | g | b) > 64*256-1)
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{
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r = clamp(r, 0, 64*256-1);
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g = clamp(g, 0, 64*256-1);
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b = clamp(b, 0, 64*256-1);
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}
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*dst = LCD_RGBPACK_LCD(r >> 9, g >> 8, b >> 9);
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#if LCD_WIDTH >= LCD_HEIGHT
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dst++;
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#else
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dst += LCD_WIDTH;
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#endif
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}
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while (dst < row_end);
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ysrc += stride;
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usrc += stride >> 1;
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vsrc += stride >> 1;
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#if LCD_WIDTH >= LCD_HEIGHT
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row_end += LCD_WIDTH;
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dst += LCD_WIDTH - width;
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#else
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row_end -= 1;
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dst -= LCD_WIDTH*width + 1;
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#endif
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}
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while (--height > 0);
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}
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#endif /* defined(SIMULATOR) && defined(HAVE_LCD_COLOR) */
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void vo_draw_frame (uint8_t * const * buf)
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{
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#ifdef HAVE_LCD_COLOR
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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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#if LCD_WIDTH >= LCD_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_update_rect(output_y,output_x,output_height,output_width);
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#endif
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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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#else
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gray_ub_gray_bitmap_part(buf[0],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(const mpeg2_sequence_t * sequence)
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{
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image_width=sequence->width;
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image_height=sequence->height;
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image_chroma_x=image_width/sequence->chroma_width;
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image_chroma_y=image_height/sequence->chroma_height;
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if (sequence->display_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 = sequence->display_width;
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output_x = (SCREEN_WIDTH-sequence->display_width)/2;
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}
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if (sequence->display_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 = sequence->display_height;
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output_y = (SCREEN_HEIGHT-sequence->display_height)/2;
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}
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}
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