From 287d6223d3e4f90043e5fd36cf49d7267b53023d Mon Sep 17 00:00:00 2001 From: Michael Sevakis Date: Tue, 25 Sep 2007 02:59:42 +0000 Subject: Dithering option for mpegplayer on gigabeat-f/x and e200. Assembly IDCT for ARm just to make it all work more nicely. Move UI simulator YUV code to its core to adapt it. git-svn-id: svn://svn.rockbox.org/rockbox/trunk@14851 a1c6a512-1295-4272-9138-f99709370657 --- uisimulator/sdl/lcd-bitmap.c | 204 +++++++++++++++++++++++++++++++++++++++++++ 1 file changed, 204 insertions(+) (limited to 'uisimulator/sdl') diff --git a/uisimulator/sdl/lcd-bitmap.c b/uisimulator/sdl/lcd-bitmap.c index da6acce1bc..12cc063288 100644 --- a/uisimulator/sdl/lcd-bitmap.c +++ b/uisimulator/sdl/lcd-bitmap.c @@ -159,3 +159,207 @@ void sim_lcd_ex_update_rect(int x_start, int y_start, int width, int height) } #endif +#ifdef HAVE_LCD_COLOR +/** + * |R| |1.000000 -0.000001 1.402000| |Y'| + * |G| = |1.000000 -0.334136 -0.714136| |Pb| + * |B| |1.000000 1.772000 0.000000| |Pr| + * Scaled, normalized, rounded and tweaked to yield RGB 565: + * |R| |74 0 101| |Y' - 16| >> 9 + * |G| = |74 -24 -51| |Cb - 128| >> 8 + * |B| |74 128 0| |Cr - 128| >> 9 + */ +#define YFAC (74) +#define RVFAC (101) +#define GUFAC (-24) +#define GVFAC (-51) +#define BUFAC (128) + +static inline int clamp(int val, int min, int max) +{ + if (val < min) + val = min; + else if (val > max) + val = max; + return val; +} + +void lcd_yuv_set_options(unsigned options) +{ + (void)options; +} + +/* Draw a partial YUV colour bitmap - similiar behavior to lcd_yuv_blit + in the core */ +void lcd_yuv_blit(unsigned char * const src[3], + int src_x, int src_y, int stride, + int x, int y, int width, int height) +{ + const unsigned char *ysrc, *usrc, *vsrc; + int linecounter; + fb_data *dst, *row_end; + long z; + + /* width and height must be >= 2 and an even number */ + width &= ~1; + linecounter = height >> 1; + +#if LCD_WIDTH >= LCD_HEIGHT + dst = &lcd_framebuffer[y][x]; + row_end = dst + width; +#else + dst = &lcd_framebuffer[x][LCD_WIDTH - y - 1]; + row_end = dst + LCD_WIDTH * width; +#endif + + z = stride * src_y; + ysrc = src[0] + z + src_x; + usrc = src[1] + (z >> 2) + (src_x >> 1); + vsrc = src[2] + (usrc - src[1]); + + /* stride => amount to jump from end of last row to start of next */ + stride -= width; + + /* upsampling, YUV->RGB conversion and reduction to RGB565 in one go */ + + do + { + do + { + int y, cb, cr, rv, guv, bu, r, g, b; + + y = YFAC*(*ysrc++ - 16); + cb = *usrc++ - 128; + cr = *vsrc++ - 128; + + rv = RVFAC*cr; + guv = GUFAC*cb + GVFAC*cr; + bu = BUFAC*cb; + + r = y + rv; + g = y + guv; + b = y + bu; + + if ((unsigned)(r | g | b) > 64*256-1) + { + r = clamp(r, 0, 64*256-1); + g = clamp(g, 0, 64*256-1); + b = clamp(b, 0, 64*256-1); + } + + *dst = LCD_RGBPACK_LCD(r >> 9, g >> 8, b >> 9); + +#if LCD_WIDTH >= LCD_HEIGHT + dst++; +#else + dst += LCD_WIDTH; +#endif + + y = YFAC*(*ysrc++ - 16); + r = y + rv; + g = y + guv; + b = y + bu; + + if ((unsigned)(r | g | b) > 64*256-1) + { + r = clamp(r, 0, 64*256-1); + g = clamp(g, 0, 64*256-1); + b = clamp(b, 0, 64*256-1); + } + + *dst = LCD_RGBPACK_LCD(r >> 9, g >> 8, b >> 9); + +#if LCD_WIDTH >= LCD_HEIGHT + dst++; +#else + dst += LCD_WIDTH; +#endif + } + while (dst < row_end); + + ysrc += stride; + usrc -= width >> 1; + vsrc -= width >> 1; + +#if LCD_WIDTH >= LCD_HEIGHT + row_end += LCD_WIDTH; + dst += LCD_WIDTH - width; +#else + row_end -= 1; + dst -= LCD_WIDTH*width + 1; +#endif + + do + { + int y, cb, cr, rv, guv, bu, r, g, b; + + y = YFAC*(*ysrc++ - 16); + cb = *usrc++ - 128; + cr = *vsrc++ - 128; + + rv = RVFAC*cr; + guv = GUFAC*cb + GVFAC*cr; + bu = BUFAC*cb; + + r = y + rv; + g = y + guv; + b = y + bu; + + if ((unsigned)(r | g | b) > 64*256-1) + { + r = clamp(r, 0, 64*256-1); + g = clamp(g, 0, 64*256-1); + b = clamp(b, 0, 64*256-1); + } + + *dst = LCD_RGBPACK_LCD(r >> 9, g >> 8, b >> 9); + +#if LCD_WIDTH >= LCD_HEIGHT + dst++; +#else + dst += LCD_WIDTH; +#endif + + y = YFAC*(*ysrc++ - 16); + r = y + rv; + g = y + guv; + b = y + bu; + + if ((unsigned)(r | g | b) > 64*256-1) + { + r = clamp(r, 0, 64*256-1); + g = clamp(g, 0, 64*256-1); + b = clamp(b, 0, 64*256-1); + } + + *dst = LCD_RGBPACK_LCD(r >> 9, g >> 8, b >> 9); + +#if LCD_WIDTH >= LCD_HEIGHT + dst++; +#else + dst += LCD_WIDTH; +#endif + } + while (dst < row_end); + + ysrc += stride; + usrc += stride >> 1; + vsrc += stride >> 1; + +#if LCD_WIDTH >= LCD_HEIGHT + row_end += LCD_WIDTH; + dst += LCD_WIDTH - width; +#else + row_end -= 1; + dst -= LCD_WIDTH*width + 1; +#endif + } + while (--linecounter > 0); + +#if LCD_WIDTH >= LCD_HEIGHT + lcd_update_rect(x, y, width, height); +#else + lcd_update_rect(y, x, height, width); +#endif +} +#endif /* HAVE_LCD_COLOR */ -- cgit