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authorMichael Sevakis <jethead71@rockbox.org>2007-09-25 02:59:42 +0000
committerMichael Sevakis <jethead71@rockbox.org>2007-09-25 02:59:42 +0000
commit287d6223d3e4f90043e5fd36cf49d7267b53023d (patch)
tree04771c28f2b826099805f5a5ad98b8c4e41091cc /uisimulator/sdl
parent24327ddf7ba62c873bd392fa5abe5c341b4a47b9 (diff)
downloadrockbox-287d6223d3e4f90043e5fd36cf49d7267b53023d.tar.gz
rockbox-287d6223d3e4f90043e5fd36cf49d7267b53023d.zip
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
Diffstat (limited to 'uisimulator/sdl')
-rw-r--r--uisimulator/sdl/lcd-bitmap.c204
1 files changed, 204 insertions, 0 deletions
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 */