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Accepted FS #5786 by Michael Sevakis - lcd_yuv_blit() for X5.

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hard coded to YUV4:2:0 for now, gives ~13.5 fps.


git-svn-id: svn://svn.rockbox.org/rockbox/trunk@10528 a1c6a512-1295-4272-9138-f99709370657
This commit is contained in:
Rani Hod 2006-08-11 14:10:34 +00:00
parent d24ed9987b
commit bcd94a9b01
5 changed files with 115 additions and 8 deletions
Download patch file Download diff file Expand all files Collapse all files

4
apps/plugin.c
View file

@ -463,9 +463,7 @@ static const struct plugin_api rockbox_api = {
lcd_remote_bitmap,
#endif
#if (CONFIG_LCD == LCD_IPODCOLOR || CONFIG_LCD == LCD_IPODNANO \
|| CONFIG_LCD == LCD_H300 || CONFIG_LCD == LCD_IPODVIDEO) && \
!defined(SIMULATOR)
#if defined(HAVE_LCD_COLOR) && !defined(SIMULATOR)
lcd_yuv_blit,
#endif

4
apps/plugin.h
View file

@ -539,9 +539,7 @@ struct plugin_api {
void (*lcd_remote_bitmap)(const fb_remote_data *src, int x, int y, int width,
int height);
#endif
#if (CONFIG_LCD == LCD_IPODCOLOR || CONFIG_LCD == LCD_IPODNANO \
|| CONFIG_LCD == LCD_H300 || CONFIG_LCD == LCD_IPODVIDEO) && \
!defined(SIMULATOR)
#if defined(HAVE_LCD_COLOR) && !defined(SIMULATOR)
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);

3
apps/plugins/mpegplayer/video_out_rockbox.c
View file

@ -201,7 +201,8 @@ static void rockbox_draw_frame (vo_instance_t * instance,
(void)instance;
#if (CONFIG_LCD == LCD_IPODCOLOR || CONFIG_LCD == LCD_IPODNANO \
|| CONFIG_LCD == LCD_H300 || CONFIG_LCD == LCD_IPODVIDEO) \
|| CONFIG_LCD == LCD_H300 || CONFIG_LCD == LCD_IPODVIDEO \
|| CONFIG_LCD == LCD_X5) \
&& !defined(SIMULATOR)
rb->lcd_yuv_blit(buf,
0,0,image_width,

3
firmware/export/lcd.h
View file

@ -72,7 +72,8 @@ extern void lcd_puts_scroll_style(int x, int y, const unsigned char* string,
extern void lcd_icon(int icon, bool enable);
#if CONFIG_LCD == LCD_IPODCOLOR || CONFIG_LCD == LCD_IPODNANO \
|| CONFIG_LCD == LCD_H300 || CONFIG_LCD == LCD_IPODVIDEO
|| CONFIG_LCD == LCD_H300 || CONFIG_LCD == LCD_IPODVIDEO \
|| CONFIG_LCD == LCD_X5
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);

109
firmware/target/coldfire/iaudio/x5/lcd-x5.c
View file

@ -423,6 +423,115 @@ void lcd_blit(const fb_data* data, int x, int by, int width,
/*if(display_on)*/
}
/* Performance function to blit a YUV bitmap directly to the LCD */
/* Assumes YCrCb 4:2:0. */
/*
See http://en.wikipedia.org/wiki/YCbCr
ITU-R BT.601 (formerly CCIR 601):
|Y'| | 0.299000 0.587000 0.114000| |R|
|Pb| = |-0.168736 -0.331264 0.500000| |G| or 0.564334 * (B - Y')
|Pr| | 0.500000 -0.418688 0.081312| |B| or 0.713267 * (R - Y')
Scaled, normalized and rounded:
|Y'| | 65 129 25| |R| + 16 : 16->235
|Cb| = |-38 -74 112| |G| + 128 : 16->240
|Cr| |112 -94 -18| |B| + 128 : 16->240
The inverse:
|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 666:
|R| |298 0 409| |Y' - 16| / 1024
|G| = |298 -100 -208| |Cb - 128| / 1024
|B| |298 516 0| |Cr - 128| / 1024
*/
void lcd_yuv_blit(unsigned char * const [3], int, int, int,
int, int, int, int) ICODE_ATTR;
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 uv_stepper, uv_step, y_end;
if (!display_on)
return;
width = (width + 1) & ~1;
height = (height + 1) & ~1;
y_end = y + height;
/* Set start position and window */
lcd_write_reg(R_RAM_ADDR_SET, (x << 8) |
(((y + roll_offset) & 127) + y_offset));
lcd_write_reg(R_VERT_RAM_ADDR_POS, ((x + width - 1) << 8) | x);
lcd_begin_write_gram();
ysrc = src[0] + src_y*stride + src_x;
usrc = src[1] + (src_y*stride >> 2) + (src_x >> 1);
vsrc = src[2] + (usrc - src[1]);
stride = stride - width; /* Use end of current line->start of next */
uv_stepper = (stride >> 1) - (width >> 1);
uv_step = uv_stepper - (stride >> 1);
do
{
const unsigned char *ysrc_end = ysrc + width;
do
{
int lum, cb, cr;
int rv, guv, bu;
int r, g, b;
lum = 298* *ysrc++ - 4768; /* 298*16 */
cb = *usrc++ - 128;
cr = *vsrc++ - 128;
bu = 516*cb;
guv = -100*cb - 208*cr;
rv = 409*cr;
r = (lum + rv) >> 10;
g = (lum + guv) >> 10;
b = (lum + bu) >> 10;
if ((unsigned)r > 63)
r = (r < 0) ? 0 : 63;
if ((unsigned)g > 63)
g = (g < 0) ? 0 : 63;
if ((unsigned)b > 63)
b = (b < 0) ? 0 : 63;
LCD_DATA = (r << 3) | (g >> 3);
LCD_DATA = (g << 6) | b;
lum = 298* *ysrc++ - 4768; /* 298*16 */
r = (lum + rv) >> 10;
g = (lum + guv) >> 10;
b = (lum + bu) >> 10;
if ((unsigned)r > 63)
r = (r < 0) ? 0 : 63;
if ((unsigned)g > 63)
g = (g < 0) ? 0 : 63;
if ((unsigned)b > 63)
b = (b < 0) ? 0 : 63;
LCD_DATA = (r << 3) | (g >> 3);
LCD_DATA = (g << 6) | b;
}
while (ysrc < ysrc_end);
usrc += uv_step;
vsrc += uv_step;
uv_step = uv_stepper - uv_step;
ysrc += stride;
}
while (++y < y_end);
}
/* Update the display.
This must be called after all other LCD functions that change the