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Parts of FS #7951 by Andree Buschmann. Faster YUV BLIT (means faster mpegplayer) for Ipods Nano and Video while we're waiting for the assembler ones.

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git-svn-id: svn://svn.rockbox.org/rockbox/trunk@15147 a1c6a512-1295-4272-9138-f99709370657
This commit is contained in:
Thom Johansen 2007-10-16 19:47:15 +00:00
parent 3688e94083
commit b5f779b2ef
2 changed files with 92 additions and 118 deletions
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54
firmware/target/arm/ipod/video/lcd-video.c
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@ -135,14 +135,16 @@ void lcd_update_rect(int x, int y, int width, int height)
}
}
if (finishup_needed) {
unsigned int data;
if (finishup_needed)
{
/* Bottom-half of original lcd_bcm_finishup() function */
do {
/* This function takes about 14ms to execute - so we yield() */
unsigned int data = lcd_bcm_read32(0x1F8);
while (data == 0xFFFA0005 || data == 0xFFFF)
{
/* This loop can wait for up to 14ms - so we yield() */
yield();
data = lcd_bcm_read32(0x1F8);
} while (data == 0xFFFA0005 || data == 0xFFFF);
}
}
lcd_bcm_read32(0x1FC);
@ -234,17 +236,21 @@ void lcd_update(void)
#define MAX_6BIT 0x3f
/* Performance function to blit a YUV bitmap directly to the LCD */
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) 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)
{
width = (width + 1) & ~1;
if (finishup_needed) {
unsigned int data;
if (finishup_needed)
{
/* Bottom-half of original lcd_bcm_finishup() function */
data = lcd_bcm_read32(0x1F8);
while (data == 0xFFFA0005 || data == 0xFFFF) {
unsigned int data = lcd_bcm_read32(0x1F8);
while (data == 0xFFFA0005 || data == 0xFFFF)
{
/* This loop can wait for up to 14ms - so we yield() */
yield();
data = lcd_bcm_read32(0x1F8);
@ -321,28 +327,22 @@ void lcd_yuv_blit(unsigned char * const src[3],
We first check for red and blue components (5bit range). */
if ((red1 | blue1 | red2 | blue2) & ~MAX_5BIT)
{
if ((red1 | blue1) & ~MAX_5BIT)
{
if (red1 & ~MAX_5BIT)
red1 = (red1 >> 31) ? 0 : MAX_5BIT;
if (blue1 & ~MAX_5BIT)
blue1 = (blue1 >> 31) ? 0 : MAX_5BIT;
}
if ((red2 | blue2) & ~MAX_5BIT)
{
if (red2 & ~MAX_5BIT)
red2 = (red2 >> 31) ? 0 : MAX_5BIT;
if (blue2 & ~MAX_5BIT)
blue2 = (blue2 >> 31) ? 0 : MAX_5BIT;
}
if (red1 & ~MAX_5BIT)
red1 = (red1 >> 31) ? 0 : MAX_5BIT;
if (blue1 & ~MAX_5BIT)
blue1 = (blue1 >> 31) ? 0 : MAX_5BIT;
if (red2 & ~MAX_5BIT)
red2 = (red2 >> 31) ? 0 : MAX_5BIT;
if (blue2 & ~MAX_5BIT)
blue2 = (blue2 >> 31) ? 0 : MAX_5BIT;
}
/* We second check for green component (6bit range) */
if ((green1 | green2) & ~MAX_6BIT)
{
if (green1 & ~MAX_6BIT)
green1 = (green1 >> 31) ? 0 : MAX_6BIT;
if (green2 & ~MAX_6BIT)
green2 = (green2 >> 31) ? 0 : MAX_6BIT;
if (green1 & ~MAX_6BIT)
green1 = (green1 >> 31) ? 0 : MAX_6BIT;
if (green2 & ~MAX_6BIT)
green2 = (green2 >> 31) ? 0 : MAX_6BIT;
}
/* pixel1 */