mirror
/
RGBtoHDMI
kopia lustrzana https://github.com/hoglet67/RGBtoHDMI
1
0
Forkuj 0
Kod Zgłoszenia Projekty Wydania Wiki Aktywność

Further performance optimizations to deinterlacing (IanB) 

Change-Id: I5214aeebe8c742af4f2d76342c17e2226df83faa
pull/28/head
David Banks 2018-10-21 12:37:53 +01:00
rodzic 6eb5841c33
commit 175eefcdcf
1 zmienionych plików z 17 dodań i 14 usunięć
Pokaż statystyki Ściągnij plik aktualizacji Ściągnij plik porównania Expand all files Collapse all files

31
src/rgb_to_fb.S
Wyświetl plik

@ -206,10 +206,7 @@ process_chars_7\@:
tst r3, #BIT_FIELD_TYPE // test odd or even field tst r3, #BIT_FIELD_TYPE // test odd or even field
rsbeq r1, r1,#0 // negate offset if odd field to write to line above rsbeq r1, r1,#0 // negate offset if odd field to write to line above
mov r5, #0x77000000 // extract OSD mask
orr r5, #0x00770000
orr r5, #0x00007700
orr r5, #0x00000077
ldr r11, =SCREEN_HEIGHT ldr r11, =SCREEN_HEIGHT
mul r11, r11, r2 // offset to second buffer used for comparison not for display mul r11, r11, r2 // offset to second buffer used for comparison not for display
@ -226,6 +223,7 @@ process_chars_loop_7\@:
// Wait for 1-0 edge on PSYNC // Wait for 1-0 edge on PSYNC
WAIT_FOR_PSYNC_0 WAIT_FOR_PSYNC_0
.endif .endif
ldr r5, [r12,r1] // read other field pixel value (offset above or below in r1)
// Pixel 0 in GPIO 4.. 2 -> 7.. 4 // Pixel 0 in GPIO 4.. 2 -> 7.. 4
// Pixel 1 in GPIO 7.. 5 -> 3.. 0 // Pixel 1 in GPIO 7.. 5 -> 3.. 0
@ -280,8 +278,13 @@ process_chars_loop_7\@:
// r5 = bitmask 0x77777777 to extract OSD bits // r5 = bitmask 0x77777777 to extract OSD bits
// r11 = offset to comparison buffer // r11 = offset to comparison buffer
mov r8, #0x77000000 // extract OSD mask
orr r8, #0x00770000
orr r8, #0x00007700
orr r8, #0x00000077
mov r9, r0 // make a copy of old pixel value in r9 mov r9, r0 // make a copy of old pixel value in r9
bic r0, r5 // clear old video bits, retaining OSD bits bic r0, r8 // clear old video bits, retaining OSD bits
orr r10, r0 // merge new video bits orr r10, r0 // merge new video bits
str r10, [r12,r11] // save in comparison buffer str r10, [r12,r11] // save in comparison buffer
@ -293,20 +296,20 @@ process_chars_loop_7\@:
cmp r10, r9 // is new value same as old value? cmp r10, r9 // is new value same as old value?
andne r9, r10, r5 // r9 is now free, use it for the new pixel value (without an OSD) andne r9, r10, r8 // r9 is now free, use it for the new pixel value (without an OSD)
ldrne r0, [r12,r1] // read other field pixel value (offset above or below in r1)
bicne r0, r5 // clear old video bits, retaining OSD bits bicne r5, r8 // clear old video bits, retaining OSD bits
orrne r0, r9 // merge new video bits orrne r5, r9 // merge new video bits
strne r0, [r12,r1] // overwrite other field pixel value (offset above or below in r1) strne r5, [r12,r1] // overwrite other field pixel value (offset above or below in r1)
tstne r3, #BIT_DEINT_MODE // Only do the next bit if pixels different, and deinterlace=Motion Adative 2 tstne r3, #BIT_DEINT_MODE // Only do the next bit if pixels different, and deinterlace=Motion Adative 2
addne r8, r11, r2 // adjust pointer to next line in comparison buffer addne r5, r11, r2 // adjust pointer to next line in comparison buffer
ldrne r0, [r12,r8] // read next line of comparison buffer ldrne r0, [r12,r5] // read next line of comparison buffer
bicne r0, r5 // clear old video bits, retaining OSD bits bicne r0, r8 // clear old video bits, retaining OSD bits
orrne r0, r9 // merge new video bits orrne r0, r9 // merge new video bits
strne r0, [r12,r8] // overwrite next line of comparison buffer (delays end of deinterlacing) strne r0, [r12,r5] // overwrite next line of comparison buffer (delays end of deinterlacing)
skip_deinterlace\@: skip_deinterlace\@: