forked from len0rd/rockbox
Faster video rendering for e200 and Gigabeat.
git-svn-id: svn://svn.rockbox.org/rockbox/trunk@14675 a1c6a512-1295-4272-9138-f99709370657
This commit is contained in:
Michael Sevakis
parent
79244b2a3b
commit
e6511d8eaa
4 changed files with 234 additions and 290 deletions
|
|
@ -103,8 +103,7 @@ lcd_copy_buffer_rect: @
|
||||||
|
|
||||||
/****************************************************************************
|
/****************************************************************************
|
||||||
* void lcd_write_yuv_420_lines(fb_data *dst,
|
* void lcd_write_yuv_420_lines(fb_data *dst,
|
||||||
* unsigned char chroma_buf[LCD_HEIGHT/2*3],
|
* unsigned char const * const src[3],
|
||||||
unsigned char const * const src[3],
|
|
||||||
* int width,
|
* int width,
|
||||||
* int stride);
|
* int stride);
|
||||||
*
|
*
|
||||||
|
|
@ -115,189 +114,166 @@ lcd_copy_buffer_rect: @
|
||||||
* |R| |74 0 101| |Y' - 16| >> 9
|
* |R| |74 0 101| |Y' - 16| >> 9
|
||||||
* |G| = |74 -24 -51| |Cb - 128| >> 8
|
* |G| = |74 -24 -51| |Cb - 128| >> 8
|
||||||
* |B| |74 128 0| |Cr - 128| >> 9
|
* |B| |74 128 0| |Cr - 128| >> 9
|
||||||
|
*
|
||||||
|
* Write four RGB565 pixels in the following order on each loop:
|
||||||
|
* 1 3 + > down
|
||||||
|
* 2 4 \/ left
|
||||||
*/
|
*/
|
||||||
.section .icode, "ax", %progbits
|
.section .icode, "ax", %progbits
|
||||||
.align 2
|
.align 2
|
||||||
.global lcd_write_yuv420_lines
|
.global lcd_write_yuv420_lines
|
||||||
.type lcd_write_yuv420_lines, %function
|
.type lcd_write_yuv420_lines, %function
|
||||||
lcd_write_yuv420_lines:
|
lcd_write_yuv420_lines:
|
||||||
@ r0 = dst
|
@ r0 = dst
|
||||||
@ r1 = chroma_buf
|
@ r1 = yuv_src
|
||||||
@ r2 = yuv_src
|
@ r2 = width
|
||||||
@ r3 = width
|
@ r3 = stride
|
||||||
@ [sp] = stride
|
stmfd sp!, { r4-r12 } @ save non-scratch
|
||||||
stmfd sp!, { r4-r12, lr } @ save non-scratch
|
ldmia r1, { r4, r5, r6 } @ r4 = yuv_src[0] = Y'_p
|
||||||
stmfd sp!, { r0, r3 } @ save dst and width
|
|
||||||
mov r14, #74 @ r14 = Y factor
|
|
||||||
ldmia r2, { r4, r5, r6 } @ r4 = yuv_src[0] = Y'_p
|
|
||||||
@ r5 = yuv_src[1] = Cb_p
|
@ r5 = yuv_src[1] = Cb_p
|
||||||
@ r6 = yuv_src[2] = Cr_p
|
@ r6 = yuv_src[2] = Cr_p
|
||||||
10: @ loop line 1 @
|
@ r1 = scratch
|
||||||
ldrb r2, [r4], #1 @ r2 = *Y'_p++;
|
10: @ loop line @
|
||||||
ldrb r8, [r5], #1 @ r8 = *Cb_p++;
|
ldrb r7, [r4] @ r7 = *Y'_p;
|
||||||
ldrb r11, [r6], #1 @ r11 = *Cr_p++;
|
ldrb r8, [r5], #1 @ r8 = *Cb_p++;
|
||||||
|
ldrb r9, [r6], #1 @ r9 = *Cr_p++;
|
||||||
@
|
@
|
||||||
@ compute Y
|
sub r7, r7, #16 @ r7 = Y = (Y' - 16)*74
|
||||||
sub r2, r2, #16 @ r7 = Y = (Y' - 16)*74
|
add r12, r7, r7, asl #2 @ actually (Y' - 16)*37 and shift right
|
||||||
mul r7, r2, r14 @
|
add r7, r12, r7, asl #5 @ by one less when adding - same for all
|
||||||
@
|
@
|
||||||
sub r8, r8, #128 @ Cb -= 128
|
sub r8, r8, #128 @ Cb -= 128
|
||||||
sub r11, r11, #128 @ Cr -= 128
|
sub r9, r9, #128 @ Cr -= 128
|
||||||
@
|
@
|
||||||
mvn r2, #23 @ compute guv
|
add r10, r9, r9, asl #1 @ r10 = Cr*51 + Cb*24
|
||||||
mul r10, r2, r8 @ r10 = Cb*-24
|
add r10, r10, r10, asl #4 @
|
||||||
mvn r2, #50 @
|
add r10, r10, r8, asl #3 @
|
||||||
mla r10, r2, r11, r10 @ r10 = r10 + Cr*-51
|
add r10, r10, r8, asl #4 @
|
||||||
@
|
@
|
||||||
mov r2, #101 @ compute rv
|
add r11, r9, r9, asl #2 @ r9 = Cr*101
|
||||||
mul r9, r11, r2 @ r9 = rv = Cr*101
|
add r11, r11, r9, asl #5 @
|
||||||
|
add r9, r11, r9, asl #6 @
|
||||||
@
|
@
|
||||||
@ store chromas in line buffer
|
add r8, r8, #2 @ r8 = bu = (Cb*128 + 128) >> 8
|
||||||
add r8, r8, #2 @ bu = (Cb + 2) >> 2
|
mov r8, r8, asr #2 @
|
||||||
mov r8, r8, asr #2 @
|
add r9, r9, #256 @ r9 = rv = (r9 + 256) >> 9
|
||||||
strb r8, [r1], #1 @
|
|
||||||
add r9, r9, #256 @ rv = (Cr + 256) >> 9
|
|
||||||
mov r9, r9, asr #9 @
|
mov r9, r9, asr #9 @
|
||||||
strb r9, [r1], #1 @
|
rsb r10, r10, #128 @ r10 = guv = (-r10 + 128) >> 8
|
||||||
mov r10, r10, asr #8 @ guv >>= 8
|
mov r10, r10, asr #8 @
|
||||||
strb r10, [r1], #1 @
|
|
||||||
@ compute R, G, and B
|
@ compute R, G, and B
|
||||||
add r2, r8, r7, asr #9 @ r2 = b = (Y >> 9) + bu
|
add r1, r8, r7, asr #8 @ r1 = b = (Y >> 9) + bu
|
||||||
add r11, r9, r7, asr #9 @ r11 = r = (Y >> 9) + rv
|
add r11, r9, r7, asr #8 @ r11 = r = (Y >> 9) + rv
|
||||||
add r7, r10, r7, asr #8 @ r7 = g = (Y >> 8) + guv
|
add r7, r10, r7, asr #7 @ r7 = g = (Y >> 8) + guv
|
||||||
@
|
@
|
||||||
orr r12, r2, r11 @ check if clamping is needed...
|
orr r12, r1, r11 @ check if clamping is needed...
|
||||||
orr r12, r12, r7, asr #1 @ ...at all
|
orr r12, r12, r7, asr #1 @ ...at all
|
||||||
cmp r12, #31 @
|
cmp r12, #31 @
|
||||||
bls 15f @ no clamp @
|
bls 15f @ no clamp @
|
||||||
mov r12, #31 @
|
cmp r1, #31 @ clamp b
|
||||||
cmp r12, r2 @ clamp b
|
mvnhi r1, r1, asr #31 @
|
||||||
andlo r2, r12, r2, asr #31 @
|
andhi r1, r1, #31 @
|
||||||
eorlo r2, r2, r12 @
|
cmp r11, #31 @ clamp r
|
||||||
cmp r12, r11 @ clamp r
|
mvnhi r11, r11, asr #31 @
|
||||||
andlo r11, r12, r11, asr #31 @
|
andhi r11, r11, #31 @
|
||||||
eorlo r11, r11, r12 @
|
cmp r7, #63 @ clamp g
|
||||||
cmp r12, r7, asr #1 @ clamp g
|
mvnhi r7, r7, asr #31 @
|
||||||
andlo r7, r12, r7, asr #31 @
|
andhi r7, r7, #63 @
|
||||||
eorlo r7, r7, r12 @
|
|
||||||
orrlo r7, r7, r7, asl #1 @
|
|
||||||
15: @ no clamp @
|
15: @ no clamp @
|
||||||
@
|
@
|
||||||
orr r12, r2, r7, lsl #5 @ r4 |= (g << 5)
|
orr r12, r1, r7, lsl #5 @ r4 |= (g << 5)
|
||||||
ldrb r2, [r4], #1 @ r2 = Y' = *Y'_p++
|
ldrb r7, [r4, r3] @ r7 = Y' = *(Y'_p + stride)
|
||||||
orr r12, r12, r11, lsl #11 @ r4 = b | (r << 11)
|
orr r12, r12, r11, lsl #11 @ r4 = b | (r << 11)
|
||||||
strh r12, [r0], #LCD_WIDTH @ store pixel
|
strh r12, [r0] @ store pixel
|
||||||
@
|
@
|
||||||
sub r2, r2, #16 @ r7 = Y = (Y' - 16)*74
|
sub r7, r7, #16 @ r7 = Y = (Y' - 16)*74
|
||||||
mul r7, r2, r14 @ next Y
|
add r12, r7, r7, asl #2 @
|
||||||
|
add r7, r12, r7, asl #5 @
|
||||||
@ compute R, G, and B
|
@ compute R, G, and B
|
||||||
add r2, r8, r7, asr #9 @ r2 = b = (Y >> 9) + bu
|
add r1, r8, r7, asr #8 @ r1 = b = (Y >> 9) + bu
|
||||||
add r11, r9, r7, asr #9 @ r11 = r = (Y >> 9) + rv
|
add r11, r9, r7, asr #8 @ r11 = r = (Y >> 9) + rv
|
||||||
add r7, r10, r7, asr #8 @ r7 = g = (Y >> 8) + guv
|
add r7, r10, r7, asr #7 @ r7 = g = (Y >> 8) + guv
|
||||||
@
|
@
|
||||||
orr r12, r2, r11 @ check if clamping is needed...
|
orr r12, r1, r11 @ check if clamping is needed...
|
||||||
orr r12, r12, r7, asr #1 @ ...at all
|
orr r12, r12, r7, asr #1 @ ...at all
|
||||||
cmp r12, #31 @
|
cmp r12, #31 @
|
||||||
bls 15f @ no clamp @
|
bls 15f @ no clamp @
|
||||||
mov r12, #31 @
|
cmp r1, #31 @ clamp b
|
||||||
cmp r12, r2 @ clamp b
|
mvnhi r1, r1, asr #31 @
|
||||||
andlo r2, r12, r2, asr #31 @
|
andhi r1, r1, #31 @
|
||||||
eorlo r2, r2, r12 @
|
cmp r11, #31 @ clamp r
|
||||||
cmp r12, r11 @ clamp r
|
mvnhi r11, r11, asr #31 @
|
||||||
andlo r11, r12, r11, asr #31 @
|
andhi r11, r11, #31 @
|
||||||
eorlo r11, r11, r12 @
|
cmp r7, #63 @ clamp g
|
||||||
cmp r12, r7, asr #1 @ clamp g
|
mvnhi r7, r7, asr #31 @
|
||||||
andlo r7, r12, r7, asr #31 @
|
andhi r7, r7, #63 @
|
||||||
eorlo r7, r7, r12 @
|
|
||||||
orrlo r7, r7, r7, asl #1 @
|
|
||||||
15: @ no clamp @
|
15: @ no clamp @
|
||||||
@
|
@
|
||||||
orr r12, r2, r11, lsl #11 @ r4 = b | (r << 11)
|
orr r12, r1, r11, lsl #11 @ r12 = b | (r << 11)
|
||||||
orr r12, r12, r7, lsl #5 @ r4 |= (g << 5)
|
orr r12, r12, r7, lsl #5 @ r12 |= (g << 5)
|
||||||
strh r12, [r0, #LCD_WIDTH]! @ store pixel
|
ldrb r7, [r4, #1]! @ r7 = Y' = *(++Y'_p)
|
||||||
|
strh r12, [r0, #-2] @ store pixel
|
||||||
add r0, r0, #2*LCD_WIDTH @
|
add r0, r0, #2*LCD_WIDTH @
|
||||||
@
|
@
|
||||||
subs r3, r3, #2 @
|
sub r7, r7, #16 @ r7 = Y = (Y' - 16)*74
|
||||||
bgt 10b @ loop line 1 @
|
add r12, r7, r7, asl #2 @
|
||||||
@ do second line
|
add r7, r12, r7, asl #5 @
|
||||||
@
|
|
||||||
ldmfd sp!, { r0, r3 } @ pop dst and width
|
|
||||||
sub r0, r0, #2 @ set dst to start of next line
|
|
||||||
sub r1, r1, r3, asl #1 @ rewind chroma pointer...
|
|
||||||
ldr r2, [sp, #40] @ r2 = stride
|
|
||||||
add r1, r1, r3, asr #1 @ ... (r1 -= width/2*3)
|
|
||||||
@ move sources to start of next line
|
|
||||||
sub r2, r2, r3 @ r2 = skip = stride - width
|
|
||||||
add r4, r4, r2 @ r4 = Y'_p + skip
|
|
||||||
@
|
|
||||||
20: @ loop line 2 @
|
|
||||||
ldrb r2, [r4], #1 @ r7 = Y' = *Y'_p++
|
|
||||||
ldrsb r8, [r1], #1 @ reload saved chromas
|
|
||||||
ldrsb r9, [r1], #1 @
|
|
||||||
ldrsb r10, [r1], #1 @
|
|
||||||
@
|
|
||||||
sub r2, r2, #16 @ r2 = Y = (Y' - 16)*74
|
|
||||||
mul r7, r2, r14 @
|
|
||||||
@ compute R, G, and B
|
@ compute R, G, and B
|
||||||
add r2, r8, r7, asr #9 @ r2 = b = (Y >> 9) + bu
|
add r1, r8, r7, asr #8 @ r1 = b = (Y >> 9) + bu
|
||||||
add r11, r9, r7, asr #9 @ r11 = r = (Y >> 9) + rv
|
add r11, r9, r7, asr #8 @ r11 = r = (Y >> 9) + rv
|
||||||
add r7, r10, r7, asr #8 @ r7 = g = (Y >> 8) + guv
|
add r7, r10, r7, asr #7 @ r7 = g = (Y >> 8) + guv
|
||||||
@
|
@
|
||||||
orr r12, r2, r11 @ check if clamping is needed...
|
orr r12, r1, r11 @ check if clamping is needed...
|
||||||
orr r12, r12, r7, asr #1 @ ...at all
|
orr r12, r12, r7, asr #1 @ ...at all
|
||||||
cmp r12, #31 @
|
cmp r12, #31 @
|
||||||
bls 25f @ no clamp @
|
bls 15f @ no clamp @
|
||||||
mov r12, #31 @
|
cmp r1, #31 @ clamp b
|
||||||
cmp r12, r2 @ clamp b
|
mvnhi r1, r1, asr #31 @
|
||||||
andlo r2, r12, r2, asr #31 @
|
andhi r1, r1, #31 @
|
||||||
eorlo r2, r2, r12 @
|
cmp r11, #31 @ clamp r
|
||||||
cmp r12, r11 @ clamp r
|
mvnhi r11, r11, asr #31 @
|
||||||
andlo r11, r12, r11, asr #31 @
|
andhi r11, r11, #31 @
|
||||||
eorlo r11, r11, r12 @
|
cmp r7, #63 @ clamp g
|
||||||
cmp r12, r7, asr #1 @ clamp g
|
mvnhi r7, r7, asr #31 @
|
||||||
andlo r7, r12, r7, asr #31 @
|
andhi r7, r7, #63 @
|
||||||
eorlo r7, r7, r12 @
|
15: @ no clamp @
|
||||||
orrlo r7, r7, r7, asl #1 @
|
|
||||||
25: @ no clamp @
|
|
||||||
@
|
@
|
||||||
orr r12, r2, r11, lsl #11 @ r4 = b | (r << 11)
|
orr r12, r1, r7, lsl #5 @ r12 = b | (g << 5)
|
||||||
ldrb r2, [r4], #1 @ r2 = Y' = *Y'_p++
|
ldrb r7, [r4, r3] @ r7 = Y' = *(Y'_p + stride)
|
||||||
orr r12, r12, r7, lsl #5 @ r4 |= (g << 5)
|
orr r12, r12, r11, lsl #11 @ r12 |= (r << 11)
|
||||||
strh r12, [r0], #LCD_WIDTH @ store pixel
|
strh r12, [r0] @ store pixel
|
||||||
@
|
@
|
||||||
@ do second pixel
|
sub r7, r7, #16 @ r7 = Y = (Y' - 16)*74
|
||||||
@
|
add r12, r7, r7, asl #2 @
|
||||||
sub r2, r2, #16 @ r2 = Y = (Y' - 16)*74
|
add r7, r12, r7, asl #5 @
|
||||||
mul r7, r2, r14 @
|
|
||||||
@ compute R, G, and B
|
@ compute R, G, and B
|
||||||
add r2, r8, r7, asr #9 @ r2 = b = (Y >> 9) + bu
|
add r1, r8, r7, asr #8 @ r1 = b = (Y >> 9) + bu
|
||||||
add r11, r9, r7, asr #9 @ r11 = r = (Y >> 9) + rv
|
add r11, r9, r7, asr #8 @ r11 = r = (Y >> 9) + rv
|
||||||
add r7, r10, r7, asr #8 @ r7 = g = (Y >> 8) + guv
|
add r7, r10, r7, asr #7 @ r7 = g = (Y >> 8) + guv
|
||||||
@
|
@
|
||||||
orr r12, r2, r11 @ check if clamping is needed...
|
orr r12, r1, r11 @ check if clamping is needed...
|
||||||
orr r12, r12, r7, asr #1 @ ...at all
|
orr r12, r12, r7, asr #1 @ ...at all
|
||||||
cmp r12, #31 @
|
cmp r12, #31 @
|
||||||
bls 25f @ no clamp @
|
bls 15f @ no clamp @
|
||||||
mov r12, #31 @
|
cmp r1, #31 @ clamp b
|
||||||
cmp r12, r2 @ clamp b
|
mvnhi r1, r1, asr #31 @
|
||||||
andlo r2, r12, r2, asr #31 @
|
andhi r1, r1, #31 @
|
||||||
eorlo r2, r2, r12 @
|
cmp r11, #31 @ clamp r
|
||||||
cmp r12, r11 @ clamp r
|
mvnhi r11, r11, asr #31 @
|
||||||
andlo r11, r12, r11, asr #31 @
|
andhi r11, r11, #31 @
|
||||||
eorlo r11, r11, r12 @
|
cmp r7, #63 @ clamp g
|
||||||
cmp r12, r7, asr #1 @ clamp g
|
mvnhi r7, r7, asr #31 @
|
||||||
andlo r7, r12, r7, asr #31 @
|
andhi r7, r7, #63 @
|
||||||
eorlo r7, r7, r12 @
|
15: @ no clamp @
|
||||||
orrlo r7, r7, r7, asl #1 @
|
|
||||||
25: @ no clamp @
|
|
||||||
@
|
@
|
||||||
orr r12, r2, r11, lsl #11 @ r4 = b | (r << 11)
|
orr r12, r1, r11, lsl #11 @ r12 = b | (r << 11)
|
||||||
orr r12, r12, r7, lsl #5 @ r4 |= (g << 5)
|
orr r12, r12, r7, lsl #5 @ r12 |= (g << 5)
|
||||||
strh r12, [r0, #LCD_WIDTH]! @ store pixel
|
strh r12, [r0, #-2] @ store pixel
|
||||||
add r0, r0, #2*LCD_WIDTH @
|
add r0, r0, #2*LCD_WIDTH @
|
||||||
|
add r4, r4, #1 @
|
||||||
@
|
@
|
||||||
subs r3, r3, #2 @
|
subs r2, r2, #2 @ subtract block from width
|
||||||
bgt 20b @ loop line 2 @
|
bgt 10b @ loop line @
|
||||||
@
|
@
|
||||||
ldmfd sp!, { r4-r12, pc } @ restore registers and return
|
ldmfd sp!, { r4-r12 } @ restore registers and return
|
||||||
|
bx lr @
|
||||||
.size lcd_write_yuv420_lines, .-lcd_write_yuv420_lines
|
.size lcd_write_yuv420_lines, .-lcd_write_yuv420_lines
|
||||||
|
|
|
||||||
|
|
@ -250,7 +250,6 @@ void lcd_bitmap_transparent_part(const fb_data *src, int src_x, int src_y,
|
||||||
|
|
||||||
/* Line write helper function for lcd_yuv_blit. Write two lines of yuv420. */
|
/* Line write helper function for lcd_yuv_blit. Write two lines of yuv420. */
|
||||||
extern void lcd_write_yuv420_lines(fb_data *dst,
|
extern void lcd_write_yuv420_lines(fb_data *dst,
|
||||||
unsigned char chroma_buf[LCD_HEIGHT/2*3],
|
|
||||||
unsigned char const * const src[3],
|
unsigned char const * const src[3],
|
||||||
int width,
|
int width,
|
||||||
int stride);
|
int stride);
|
||||||
|
|
@ -263,7 +262,6 @@ void lcd_yuv_blit(unsigned char * const src[3],
|
||||||
{
|
{
|
||||||
/* Caches for chroma data so it only need be recaculated every other
|
/* Caches for chroma data so it only need be recaculated every other
|
||||||
line */
|
line */
|
||||||
unsigned char chroma_buf[LCD_HEIGHT/2*3]; /* 480 bytes */
|
|
||||||
unsigned char const * yuv_src[3];
|
unsigned char const * yuv_src[3];
|
||||||
off_t z;
|
off_t z;
|
||||||
|
|
||||||
|
|
@ -283,8 +281,7 @@ void lcd_yuv_blit(unsigned char * const src[3],
|
||||||
|
|
||||||
do
|
do
|
||||||
{
|
{
|
||||||
lcd_write_yuv420_lines(dst, chroma_buf, yuv_src, width,
|
lcd_write_yuv420_lines(dst, yuv_src, width, stride);
|
||||||
stride);
|
|
||||||
yuv_src[0] += stride << 1; /* Skip down two luma lines */
|
yuv_src[0] += stride << 1; /* Skip down two luma lines */
|
||||||
yuv_src[1] += stride >> 1; /* Skip down one chroma line */
|
yuv_src[1] += stride >> 1; /* Skip down one chroma line */
|
||||||
yuv_src[2] += stride >> 1;
|
yuv_src[2] += stride >> 1;
|
||||||
|
|
|
||||||
|
|
@ -103,8 +103,7 @@ lcd_copy_buffer_rect: @
|
||||||
|
|
||||||
/****************************************************************************
|
/****************************************************************************
|
||||||
* void lcd_write_yuv_420_lines(fb_data *dst,
|
* void lcd_write_yuv_420_lines(fb_data *dst,
|
||||||
* unsigned char chroma_buf[LCD_HEIGHT/2*3],
|
* unsigned char const * const src[3],
|
||||||
unsigned char const * const src[3],
|
|
||||||
* int width,
|
* int width,
|
||||||
* int stride);
|
* int stride);
|
||||||
*
|
*
|
||||||
|
|
@ -115,189 +114,166 @@ lcd_copy_buffer_rect: @
|
||||||
* |R| |74 0 101| |Y' - 16| >> 9
|
* |R| |74 0 101| |Y' - 16| >> 9
|
||||||
* |G| = |74 -24 -51| |Cb - 128| >> 8
|
* |G| = |74 -24 -51| |Cb - 128| >> 8
|
||||||
* |B| |74 128 0| |Cr - 128| >> 9
|
* |B| |74 128 0| |Cr - 128| >> 9
|
||||||
|
*
|
||||||
|
* Write four RGB565 pixels in the following order on each loop:
|
||||||
|
* 1 3 + > down
|
||||||
|
* 2 4 \/ left
|
||||||
*/
|
*/
|
||||||
.section .icode, "ax", %progbits
|
.section .icode, "ax", %progbits
|
||||||
.align 2
|
.align 2
|
||||||
.global lcd_write_yuv420_lines
|
.global lcd_write_yuv420_lines
|
||||||
.type lcd_write_yuv420_lines, %function
|
.type lcd_write_yuv420_lines, %function
|
||||||
lcd_write_yuv420_lines:
|
lcd_write_yuv420_lines:
|
||||||
@ r0 = dst
|
@ r0 = dst
|
||||||
@ r1 = chroma_buf
|
@ r1 = yuv_src
|
||||||
@ r2 = yuv_src
|
@ r2 = width
|
||||||
@ r3 = width
|
@ r3 = stride
|
||||||
@ [sp] = stride
|
stmfd sp!, { r4-r12 } @ save non-scratch
|
||||||
stmfd sp!, { r4-r12, lr } @ save non-scratch
|
ldmia r1, { r4, r5, r6 } @ r4 = yuv_src[0] = Y'_p
|
||||||
stmfd sp!, { r0, r3 } @ save dst and width
|
|
||||||
mov r14, #74 @ r14 = Y factor
|
|
||||||
ldmia r2, { r4, r5, r6 } @ r4 = yuv_src[0] = Y'_p
|
|
||||||
@ r5 = yuv_src[1] = Cb_p
|
@ r5 = yuv_src[1] = Cb_p
|
||||||
@ r6 = yuv_src[2] = Cr_p
|
@ r6 = yuv_src[2] = Cr_p
|
||||||
10: @ loop line 1 @
|
@ r1 = scratch
|
||||||
ldrb r2, [r4], #1 @ r2 = *Y'_p++;
|
10: @ loop line @
|
||||||
ldrb r8, [r5], #1 @ r8 = *Cb_p++;
|
ldrb r7, [r4] @ r7 = *Y'_p;
|
||||||
ldrb r11, [r6], #1 @ r11 = *Cr_p++;
|
ldrb r8, [r5], #1 @ r8 = *Cb_p++;
|
||||||
|
ldrb r9, [r6], #1 @ r9 = *Cr_p++;
|
||||||
@
|
@
|
||||||
@ compute Y
|
sub r7, r7, #16 @ r7 = Y = (Y' - 16)*74
|
||||||
sub r2, r2, #16 @ r7 = Y = (Y' - 16)*74
|
add r12, r7, r7, asl #2 @ actually (Y' - 16)*37 and shift right
|
||||||
mul r7, r2, r14 @
|
add r7, r12, r7, asl #5 @ by one less when adding - same for all
|
||||||
@
|
@
|
||||||
sub r8, r8, #128 @ Cb -= 128
|
sub r8, r8, #128 @ Cb -= 128
|
||||||
sub r11, r11, #128 @ Cr -= 128
|
sub r9, r9, #128 @ Cr -= 128
|
||||||
@
|
@
|
||||||
mvn r2, #23 @ compute guv
|
add r10, r9, r9, asl #1 @ r10 = Cr*51 + Cb*24
|
||||||
mul r10, r2, r8 @ r10 = Cb*-24
|
add r10, r10, r10, asl #4 @
|
||||||
mvn r2, #50 @
|
add r10, r10, r8, asl #3 @
|
||||||
mla r10, r2, r11, r10 @ r10 = r10 + Cr*-51
|
add r10, r10, r8, asl #4 @
|
||||||
@
|
@
|
||||||
mov r2, #101 @ compute rv
|
add r11, r9, r9, asl #2 @ r9 = Cr*101
|
||||||
mul r9, r11, r2 @ r9 = rv = Cr*101
|
add r11, r11, r9, asl #5 @
|
||||||
|
add r9, r11, r9, asl #6 @
|
||||||
@
|
@
|
||||||
@ store chromas in line buffer
|
add r8, r8, #2 @ r8 = bu = (Cb*128 + 128) >> 8
|
||||||
add r8, r8, #2 @ bu = (Cb + 2) >> 2
|
mov r8, r8, asr #2 @
|
||||||
mov r8, r8, asr #2 @
|
add r9, r9, #256 @ r9 = rv = (r9 + 256) >> 9
|
||||||
strb r8, [r1], #1 @
|
|
||||||
add r9, r9, #256 @ rv = (Cr + 256) >> 9
|
|
||||||
mov r9, r9, asr #9 @
|
mov r9, r9, asr #9 @
|
||||||
strb r9, [r1], #1 @
|
rsb r10, r10, #128 @ r10 = guv = (-r10 + 128) >> 8
|
||||||
mov r10, r10, asr #8 @ guv >>= 8
|
mov r10, r10, asr #8 @
|
||||||
strb r10, [r1], #1 @
|
|
||||||
@ compute R, G, and B
|
@ compute R, G, and B
|
||||||
add r2, r8, r7, asr #9 @ r2 = b = (Y >> 9) + bu
|
add r1, r8, r7, asr #8 @ r1 = b = (Y >> 9) + bu
|
||||||
add r11, r9, r7, asr #9 @ r11 = r = (Y >> 9) + rv
|
add r11, r9, r7, asr #8 @ r11 = r = (Y >> 9) + rv
|
||||||
add r7, r10, r7, asr #8 @ r7 = g = (Y >> 8) + guv
|
add r7, r10, r7, asr #7 @ r7 = g = (Y >> 8) + guv
|
||||||
@
|
@
|
||||||
orr r12, r2, r11 @ check if clamping is needed...
|
orr r12, r1, r11 @ check if clamping is needed...
|
||||||
orr r12, r12, r7, asr #1 @ ...at all
|
orr r12, r12, r7, asr #1 @ ...at all
|
||||||
cmp r12, #31 @
|
cmp r12, #31 @
|
||||||
bls 15f @ no clamp @
|
bls 15f @ no clamp @
|
||||||
mov r12, #31 @
|
cmp r1, #31 @ clamp b
|
||||||
cmp r12, r2 @ clamp b
|
mvnhi r1, r1, asr #31 @
|
||||||
andlo r2, r12, r2, asr #31 @
|
andhi r1, r1, #31 @
|
||||||
eorlo r2, r2, r12 @
|
cmp r11, #31 @ clamp r
|
||||||
cmp r12, r11 @ clamp r
|
mvnhi r11, r11, asr #31 @
|
||||||
andlo r11, r12, r11, asr #31 @
|
andhi r11, r11, #31 @
|
||||||
eorlo r11, r11, r12 @
|
cmp r7, #63 @ clamp g
|
||||||
cmp r12, r7, asr #1 @ clamp g
|
mvnhi r7, r7, asr #31 @
|
||||||
andlo r7, r12, r7, asr #31 @
|
andhi r7, r7, #63 @
|
||||||
eorlo r7, r7, r12 @
|
|
||||||
orrlo r7, r7, r7, asl #1 @
|
|
||||||
15: @ no clamp @
|
15: @ no clamp @
|
||||||
@
|
@
|
||||||
orr r12, r2, r7, lsl #5 @ r4 |= (g << 5)
|
orr r12, r1, r7, lsl #5 @ r4 |= (g << 5)
|
||||||
ldrb r2, [r4], #1 @ r2 = Y' = *Y'_p++
|
ldrb r7, [r4, r3] @ r7 = Y' = *(Y'_p + stride)
|
||||||
orr r12, r12, r11, lsl #11 @ r4 = b | (r << 11)
|
orr r12, r12, r11, lsl #11 @ r4 = b | (r << 11)
|
||||||
strh r12, [r0], #LCD_WIDTH @ store pixel
|
strh r12, [r0] @ store pixel
|
||||||
@
|
@
|
||||||
sub r2, r2, #16 @ r7 = Y = (Y' - 16)*74
|
sub r7, r7, #16 @ r7 = Y = (Y' - 16)*74
|
||||||
mul r7, r2, r14 @ next Y
|
add r12, r7, r7, asl #2 @
|
||||||
|
add r7, r12, r7, asl #5 @
|
||||||
@ compute R, G, and B
|
@ compute R, G, and B
|
||||||
add r2, r8, r7, asr #9 @ r2 = b = (Y >> 9) + bu
|
add r1, r8, r7, asr #8 @ r1 = b = (Y >> 9) + bu
|
||||||
add r11, r9, r7, asr #9 @ r11 = r = (Y >> 9) + rv
|
add r11, r9, r7, asr #8 @ r11 = r = (Y >> 9) + rv
|
||||||
add r7, r10, r7, asr #8 @ r7 = g = (Y >> 8) + guv
|
add r7, r10, r7, asr #7 @ r7 = g = (Y >> 8) + guv
|
||||||
@
|
@
|
||||||
orr r12, r2, r11 @ check if clamping is needed...
|
orr r12, r1, r11 @ check if clamping is needed...
|
||||||
orr r12, r12, r7, asr #1 @ ...at all
|
orr r12, r12, r7, asr #1 @ ...at all
|
||||||
cmp r12, #31 @
|
cmp r12, #31 @
|
||||||
bls 15f @ no clamp @
|
bls 15f @ no clamp @
|
||||||
mov r12, #31 @
|
cmp r1, #31 @ clamp b
|
||||||
cmp r12, r2 @ clamp b
|
mvnhi r1, r1, asr #31 @
|
||||||
andlo r2, r12, r2, asr #31 @
|
andhi r1, r1, #31 @
|
||||||
eorlo r2, r2, r12 @
|
cmp r11, #31 @ clamp r
|
||||||
cmp r12, r11 @ clamp r
|
mvnhi r11, r11, asr #31 @
|
||||||
andlo r11, r12, r11, asr #31 @
|
andhi r11, r11, #31 @
|
||||||
eorlo r11, r11, r12 @
|
cmp r7, #63 @ clamp g
|
||||||
cmp r12, r7, asr #1 @ clamp g
|
mvnhi r7, r7, asr #31 @
|
||||||
andlo r7, r12, r7, asr #31 @
|
andhi r7, r7, #63 @
|
||||||
eorlo r7, r7, r12 @
|
|
||||||
orrlo r7, r7, r7, asl #1 @
|
|
||||||
15: @ no clamp @
|
15: @ no clamp @
|
||||||
@
|
@
|
||||||
orr r12, r2, r11, lsl #11 @ r4 = b | (r << 11)
|
orr r12, r1, r11, lsl #11 @ r12 = b | (r << 11)
|
||||||
orr r12, r12, r7, lsl #5 @ r4 |= (g << 5)
|
orr r12, r12, r7, lsl #5 @ r12 |= (g << 5)
|
||||||
strh r12, [r0, #LCD_WIDTH]! @ store pixel
|
ldrb r7, [r4, #1]! @ r7 = Y' = *(++Y'_p)
|
||||||
|
strh r12, [r0, #-2] @ store pixel
|
||||||
add r0, r0, #2*LCD_WIDTH @
|
add r0, r0, #2*LCD_WIDTH @
|
||||||
@
|
@
|
||||||
subs r3, r3, #2 @
|
sub r7, r7, #16 @ r7 = Y = (Y' - 16)*74
|
||||||
bgt 10b @ loop line 1 @
|
add r12, r7, r7, asl #2 @
|
||||||
@ do second line
|
add r7, r12, r7, asl #5 @
|
||||||
@
|
|
||||||
ldmfd sp!, { r0, r3 } @ pop dst and width
|
|
||||||
sub r0, r0, #2 @ set dst to start of next line
|
|
||||||
sub r1, r1, r3, asl #1 @ rewind chroma pointer...
|
|
||||||
ldr r2, [sp, #40] @ r2 = stride
|
|
||||||
add r1, r1, r3, asr #1 @ ... (r1 -= width/2*3)
|
|
||||||
@ move sources to start of next line
|
|
||||||
sub r2, r2, r3 @ r2 = skip = stride - width
|
|
||||||
add r4, r4, r2 @ r4 = Y'_p + skip
|
|
||||||
@
|
|
||||||
20: @ loop line 2 @
|
|
||||||
ldrb r2, [r4], #1 @ r7 = Y' = *Y'_p++
|
|
||||||
ldrsb r8, [r1], #1 @ reload saved chromas
|
|
||||||
ldrsb r9, [r1], #1 @
|
|
||||||
ldrsb r10, [r1], #1 @
|
|
||||||
@
|
|
||||||
sub r2, r2, #16 @ r2 = Y = (Y' - 16)*74
|
|
||||||
mul r7, r2, r14 @
|
|
||||||
@ compute R, G, and B
|
@ compute R, G, and B
|
||||||
add r2, r8, r7, asr #9 @ r2 = b = (Y >> 9) + bu
|
add r1, r8, r7, asr #8 @ r1 = b = (Y >> 9) + bu
|
||||||
add r11, r9, r7, asr #9 @ r11 = r = (Y >> 9) + rv
|
add r11, r9, r7, asr #8 @ r11 = r = (Y >> 9) + rv
|
||||||
add r7, r10, r7, asr #8 @ r7 = g = (Y >> 8) + guv
|
add r7, r10, r7, asr #7 @ r7 = g = (Y >> 8) + guv
|
||||||
@
|
@
|
||||||
orr r12, r2, r11 @ check if clamping is needed...
|
orr r12, r1, r11 @ check if clamping is needed...
|
||||||
orr r12, r12, r7, asr #1 @ ...at all
|
orr r12, r12, r7, asr #1 @ ...at all
|
||||||
cmp r12, #31 @
|
cmp r12, #31 @
|
||||||
bls 25f @ no clamp @
|
bls 15f @ no clamp @
|
||||||
mov r12, #31 @
|
cmp r1, #31 @ clamp b
|
||||||
cmp r12, r2 @ clamp b
|
mvnhi r1, r1, asr #31 @
|
||||||
andlo r2, r12, r2, asr #31 @
|
andhi r1, r1, #31 @
|
||||||
eorlo r2, r2, r12 @
|
cmp r11, #31 @ clamp r
|
||||||
cmp r12, r11 @ clamp r
|
mvnhi r11, r11, asr #31 @
|
||||||
andlo r11, r12, r11, asr #31 @
|
andhi r11, r11, #31 @
|
||||||
eorlo r11, r11, r12 @
|
cmp r7, #63 @ clamp g
|
||||||
cmp r12, r7, asr #1 @ clamp g
|
mvnhi r7, r7, asr #31 @
|
||||||
andlo r7, r12, r7, asr #31 @
|
andhi r7, r7, #63 @
|
||||||
eorlo r7, r7, r12 @
|
15: @ no clamp @
|
||||||
orrlo r7, r7, r7, asl #1 @
|
|
||||||
25: @ no clamp @
|
|
||||||
@
|
@
|
||||||
orr r12, r2, r11, lsl #11 @ r4 = b | (r << 11)
|
orr r12, r1, r7, lsl #5 @ r12 = b | (g << 5)
|
||||||
ldrb r2, [r4], #1 @ r2 = Y' = *Y'_p++
|
ldrb r7, [r4, r3] @ r7 = Y' = *(Y'_p + stride)
|
||||||
orr r12, r12, r7, lsl #5 @ r4 |= (g << 5)
|
orr r12, r12, r11, lsl #11 @ r12 |= (r << 11)
|
||||||
strh r12, [r0], #LCD_WIDTH @ store pixel
|
strh r12, [r0] @ store pixel
|
||||||
@
|
@
|
||||||
@ do second pixel
|
sub r7, r7, #16 @ r7 = Y = (Y' - 16)*74
|
||||||
@
|
add r12, r7, r7, asl #2 @
|
||||||
sub r2, r2, #16 @ r2 = Y = (Y' - 16)*74
|
add r7, r12, r7, asl #5 @
|
||||||
mul r7, r2, r14 @
|
|
||||||
@ compute R, G, and B
|
@ compute R, G, and B
|
||||||
add r2, r8, r7, asr #9 @ r2 = b = (Y >> 9) + bu
|
add r1, r8, r7, asr #8 @ r1 = b = (Y >> 9) + bu
|
||||||
add r11, r9, r7, asr #9 @ r11 = r = (Y >> 9) + rv
|
add r11, r9, r7, asr #8 @ r11 = r = (Y >> 9) + rv
|
||||||
add r7, r10, r7, asr #8 @ r7 = g = (Y >> 8) + guv
|
add r7, r10, r7, asr #7 @ r7 = g = (Y >> 8) + guv
|
||||||
@
|
@
|
||||||
orr r12, r2, r11 @ check if clamping is needed...
|
orr r12, r1, r11 @ check if clamping is needed...
|
||||||
orr r12, r12, r7, asr #1 @ ...at all
|
orr r12, r12, r7, asr #1 @ ...at all
|
||||||
cmp r12, #31 @
|
cmp r12, #31 @
|
||||||
bls 25f @ no clamp @
|
bls 15f @ no clamp @
|
||||||
mov r12, #31 @
|
cmp r1, #31 @ clamp b
|
||||||
cmp r12, r2 @ clamp b
|
mvnhi r1, r1, asr #31 @
|
||||||
andlo r2, r12, r2, asr #31 @
|
andhi r1, r1, #31 @
|
||||||
eorlo r2, r2, r12 @
|
cmp r11, #31 @ clamp r
|
||||||
cmp r12, r11 @ clamp r
|
mvnhi r11, r11, asr #31 @
|
||||||
andlo r11, r12, r11, asr #31 @
|
andhi r11, r11, #31 @
|
||||||
eorlo r11, r11, r12 @
|
cmp r7, #63 @ clamp g
|
||||||
cmp r12, r7, asr #1 @ clamp g
|
mvnhi r7, r7, asr #31 @
|
||||||
andlo r7, r12, r7, asr #31 @
|
andhi r7, r7, #63 @
|
||||||
eorlo r7, r7, r12 @
|
15: @ no clamp @
|
||||||
orrlo r7, r7, r7, asl #1 @
|
|
||||||
25: @ no clamp @
|
|
||||||
@
|
@
|
||||||
orr r12, r2, r11, lsl #11 @ r4 = b | (r << 11)
|
orr r12, r1, r11, lsl #11 @ r12 = b | (r << 11)
|
||||||
orr r12, r12, r7, lsl #5 @ r4 |= (g << 5)
|
orr r12, r12, r7, lsl #5 @ r12 |= (g << 5)
|
||||||
strh r12, [r0, #LCD_WIDTH]! @ store pixel
|
strh r12, [r0, #-2] @ store pixel
|
||||||
add r0, r0, #2*LCD_WIDTH @
|
add r0, r0, #2*LCD_WIDTH @
|
||||||
|
add r4, r4, #1 @
|
||||||
@
|
@
|
||||||
subs r3, r3, #2 @
|
subs r2, r2, #2 @ subtract block from width
|
||||||
bgt 20b @ loop line 2 @
|
bgt 10b @ loop line @
|
||||||
@
|
@
|
||||||
ldmfd sp!, { r4-r12, pc } @ restore registers and return
|
ldmfd sp!, { r4-r12 } @ restore registers and return
|
||||||
|
bx lr @
|
||||||
.size lcd_write_yuv420_lines, .-lcd_write_yuv420_lines
|
.size lcd_write_yuv420_lines, .-lcd_write_yuv420_lines
|
||||||
|
|
|
||||||
|
|
@ -627,7 +627,6 @@ void lcd_blit(const fb_data* data, int x, int by, int width,
|
||||||
|
|
||||||
/* Line write helper function for lcd_yuv_blit. Write two lines of yuv420. */
|
/* Line write helper function for lcd_yuv_blit. Write two lines of yuv420. */
|
||||||
extern void lcd_write_yuv420_lines(fb_data *dst,
|
extern void lcd_write_yuv420_lines(fb_data *dst,
|
||||||
unsigned char chroma_buf[LCD_HEIGHT/2*3],
|
|
||||||
unsigned char const * const src[3],
|
unsigned char const * const src[3],
|
||||||
int width,
|
int width,
|
||||||
int stride);
|
int stride);
|
||||||
|
|
@ -638,9 +637,6 @@ void lcd_yuv_blit(unsigned char * const src[3],
|
||||||
int src_x, int src_y, int stride,
|
int src_x, int src_y, int stride,
|
||||||
int x, int y, int width, int height)
|
int x, int y, int width, int height)
|
||||||
{
|
{
|
||||||
/* Caches for chroma data so it only need be recaculated every other
|
|
||||||
line */
|
|
||||||
static unsigned char chroma_buf[LCD_HEIGHT/2*3]; /* 330 bytes */
|
|
||||||
unsigned char const * yuv_src[3];
|
unsigned char const * yuv_src[3];
|
||||||
off_t z;
|
off_t z;
|
||||||
|
|
||||||
|
|
@ -661,8 +657,7 @@ void lcd_yuv_blit(unsigned char * const src[3],
|
||||||
|
|
||||||
do
|
do
|
||||||
{
|
{
|
||||||
lcd_write_yuv420_lines(dst, chroma_buf, yuv_src, width,
|
lcd_write_yuv420_lines(dst, yuv_src, width, stride);
|
||||||
stride);
|
|
||||||
yuv_src[0] += stride << 1; /* Skip down two luma lines */
|
yuv_src[0] += stride << 1; /* Skip down two luma lines */
|
||||||
yuv_src[1] += stride >> 1; /* Skip down one chroma line */
|
yuv_src[1] += stride >> 1; /* Skip down one chroma line */
|
||||||
yuv_src[2] += stride >> 1;
|
yuv_src[2] += stride >> 1;
|
||||||
|
|
|
||||||
Loading…
Add table
Add a link
Reference in a new issue