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-rw-r--r--noncore/multimedia/opieplayer2/yuv2rgb_arm4l.S21
1 files changed, 21 insertions, 0 deletions
diff --git a/noncore/multimedia/opieplayer2/yuv2rgb_arm4l.S b/noncore/multimedia/opieplayer2/yuv2rgb_arm4l.S
index f4a3395..521bcaa 100644
--- a/noncore/multimedia/opieplayer2/yuv2rgb_arm4l.S
+++ b/noncore/multimedia/opieplayer2/yuv2rgb_arm4l.S
@@ -1,192 +1,213 @@
+/*
+Copyright (c) 2001 Lionel Ulmer (lionel.ulmer@free.fr / bbrox@bbrox.org)
+
+Permission is hereby granted, free of charge, to any person obtaining a copy
+of this software and associated documentation files (the "Software"), to deal
+in the Software without restriction, including without limitation the rights
+to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
+copies of the Software, and to permit persons to whom the Software is
+furnished to do so, subject to the following conditions:
+
+The above copyright notice and this permission notice shall be included in
+all copies or substantial portions of the Software.
+
+THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
+IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
+FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
+COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER
+IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN
+CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.
+*/
+
/* WARNING : this function only works when stride_U == stride_V (I use some hacks to
not have to do too many computations at line's end)...
C-like prototype :
void convert_yuv420_rgb565(AVPicture *picture, unsigned char *results, int w, int h) ;
*/
#ifdef __arm__
.text
.align
.global convert_yuv420_rgb565
convert_yuv420_rgb565:
stmdb sp!, { r4 - r12, lr } @ all callee saved regs
ldr r7, [r0, #0] @ Y ptr
ldr r9, [r0, #4] @ U ptr
ldr r10, [r0, #8] @ V ptr
subs r10, r10, r9 @ V ptr - U ptr
ldr r8, [r0, #12]
add r8, r8, r7 @ Y + stride_Y
ldr r4, [r0, #12] @ Stride_Y
mov r4, r4, lsl #1
sub r4, r4, r2 @ (2 * Stride_Y) - width
ldr r5, [r0, #16] @ Stride_U
sub r5, r5, r2, lsr #1 @ Stride_U - (width / 2)
ldr r6, [r0, #20] @ Stride_V
sub r6, r6, r2, lsr #1 @ Stride_V - (width / 2)
add r0, r1, r2, lsl #1 @ RGB + 1
stmdb sp!, { r0-r10 }
@ Stack description :
@ (sp+ 0) RGB + one line
@ (sp+ 4) RGB
@ (sp+ 8) width (save)
@ (sp+12) height
@ (sp+16) (2 * stride_Y) - width
@ (sp+20) stride_U - (width / 2)
@ (sp+24) stride_V - (width / 2) !!! UNUSED !!!
@ (sp+28) Y ptr
@ (sp+32) Y ptr + one line
@ (sp+36) U ptr
@ (sp+40) V - U
mov lr, r2 @ Initialize the width counter
add r0, pc, #(const_storage-.-8) @ r0 = base pointer to the constants array
ldr r8, [r0, #(4*4)] @ r8 = multy
yuv_loop:
add r0, pc, #(const_storage-.-8) @ r0 = base pointer to the constants array
ldr r10, [sp, #28] @ r10 = Y
ldr r1, [sp, #36] @ r1 = U
ldrb r9, [r10, #0] @ r9 = *Y
ldrb r11, [r1] @ r11 = *U
add r1, r1, #1 @ r1 = U++
ldr r2, [sp, #40] @ r2 = V - U
str r1, [sp, #36] @ store U++
add r2, r1, r2 @ r2 = V+1
ldrb r12, [r2, #-1] @ r12 = *V
sub r11, r11, #128 @ r11 = *U - 128
sub r12, r12, #128 @ r12 = *V - 128
ldr r1, [r0, #(4*0)] @ r1 = crv
mov r7, #32768 @ r7 = 32768 (for additions in MLA)
ldr r2, [r0, #(4*3)] @ r2 = -cgv
mla r6, r1, r12, r7 @ r6 = nonyc_r = crv * (*V - 128) + 32768
ldr r3, [r0, #(4*1)] @ r3 = cbu
mla r4, r2, r12, r7 @ r4 = - cgv * (*V - 128) + 32768
sub r9, r9, #16 @ r9 = *Y - 16
mla r5, r3, r11, r7 @ r5 = nonyc_b = cbu * (*U - 128) + 32768
ldr r0, [r0, #(4*2)] @ r0 = -cgu
mla r7, r8, r9, r6 @ r7 = (*Y - 16) * multy + nonyc_r
add r10, r10, #2 @ r10 = Y + 2
mla r4, r0, r11, r4 @ r4 = nonyc_g = - cgu * (*U - 128) + r4 = - cgu * (*U - 128) - cgv * (*V - 128) + 32768
add r0, pc, #(rb_clip-.-8) @ r0 contains the pointer to the R and B clipping array
mla r12, r8, r9, r5 @ r12 = (*Y - 16) * multy + nonyc_b
ldrb r7, [r0, r7, asr #(16+3)] @ r7 = R composant
mla r1, r8, r9, r4 @ r1 = (*Y - 16) * multy + nonyc_g
ldrb r9, [r10, #-1] @ r9 = *(Y+1)
str r10, [sp, #28] @ save Y + 2
ldrb r12, [r0, r12, asr #(16+3)] @ r12 = B composant (and the start of the RGB word)
add r11, pc, #(g_clip-.-8) @ r11 now contains the pointer to the G clipping array
ldrb r1, [r11, r1, asr #(16+2)] @ r1 contains the G part of the RGB triplet
sub r9, r9, #16 @ r9 = *(Y+1) - 16
mla r10, r8, r9, r6 @ r10 is the Red part of the RGB triplet
add r12, r12, r7, lsl #11 @ r12 = .GB ...
mla r7, r8, r9, r5 @ r7 is the Blue part of the RGB triplet
add r12, r12, r1, lsl #5 @ r12 = RGB ... (ie the first pixel (half-word) is done)
mla r2, r8, r9, r4 @ r2 is the Green part of the RGB triplet
ldrb r10, [r0, r10, asr #(16+3)] @ r10 = R composant
ldrb r7, [r0, r7, asr #(16+3)] @ r7 = B composant
ldr r1, [sp, #32] @ r1 = Ynext
ldrb r2, [r11, r2, asr #(16+2)] @ r2 = G composant
ldrb r9, [r1] @ r9 = *Ynext
add r12, r12, r2, lsl #(5+16) @ r12 = RGB .G.
sub r9, r9, #16 @ r9 = *Ynext - 16
mla r2, r8, r9, r4 @ r2 is the Green part of the RGB triplet
add r12, r12, r7, lsl #(0+16) @ r12 = RGB .GB
mla r7, r8, r9, r5 @ r7 is the Blue part of the RGB triplet
add r12, r12, r10, lsl #(11+16) @ r12 = RGB RGB
ldr r3, [sp, #4] @ r3 = RGB
mla r10, r8, r9, r6 @ r10 is the Red part of the RGB triplet
str r12, [r3] @ store the rgb pixel at *RGB
add r3, r3, #4 @ r3 = RGB++ (ie next double-pixel)
str r3, [sp, #4] @ store the RGB pointer
ldrb r9, [r1, #1] @ r9 = *(Ynext+1)
add r1, r1, #2 @ r1 = Ynext + 2
sub r9, r9, #16 @ r9 = *(Ynext+1) - 16
ldrb r12, [r0, r7, asr #(16+3)] @ r12 = ..B ...
ldrb r10, [r0, r10, asr #(16+3)] @ r10 = B composant
mla r7, r8, r9, r5 @ r7 is the Blue part of the RGB triplet
add r12, r12, r10, lsl #11 @ r12 = R.B ...
ldrb r2, [r11, r2, asr #(16+2)] @ r2 = G composant
mla r10, r8, r9, r6 @ r10 is the Red part of the RGB triplet
add r12, r12, r2, lsl #5 @ r12 = RGB ...
mla r2, r8, r9, r4 @ r2 is the Green part of the RGB triplet
ldrb r7, [r0, r7, asr #(16+3)] @ r7 = B composant
str r1, [sp, #32] @ store the increased Ynext pointer
add r12, r12, r7, lsl #(16+0) @ r12 = RGB ..B
ldrb r10, [r0, r10, asr #(16+3)] @ r10 = R composant
ldr r3, [sp, #0] @ r3 = RGBnext pointer
add r12, r12, r10, lsl #(16+11) @ r12 = RGB R.B
ldrb r2, [r11, r2, asr #(16+2)] @ r2 = G composant
add r3, r3, #4 @ r3 = next pixel on the RGBnext line
add r12, r12, r2, lsl #(16+5) @ r12 = RGB RGB
str r12, [r3, #-4] @ store the next pixel
str r3, [sp, #0] @ store the increased 'next line' pixel pointer
subs lr, lr, #2 @ decrement the line counter
bne yuv_loop @ and restart if not at the end of the line
ldr r0, [sp, #8] @ r0 = saved width
ldr r1, [sp, #0] @ r1 = RGBnext pointer
mov lr, r0 @ lr = saved width (to restart the line counter)
str r1, [sp, #4] @ current RGBnext pointer is next iteration RGB pointer
add r1, r1, r0, lsl #1 @ r1 = update RGBnext to next line
str r1, [sp, #0] @ store updated RGBnext pointer
ldr r3, [sp, #16] @ r3 = (2 * stride_Y) - width
ldr r4, [sp, #28] @ r4 = Y ptr
ldr r5, [sp, #32] @ r5 = Ynext ptr
add r4, r4, r3 @ r4 = Y ptr for the next two lines
add r5, r5, r3 @ r5 = Ynext ptr for the next two lines
str r4, [sp, #28] @ store updated Y pointer
str r5, [sp, #32] @ store update Ynext pointer
ldr r1, [sp, #20] @ r1 = stride_U - (width / 2)
ldr r2, [sp, #36] @ r2 = U ptr
ldr r6, [sp, #12] @ get height counter
add r2, r2, r1 @ update U ptr
str r2, [sp, #36] @ store updated U ptr (and update 'V' at the same time :-) )
subs r6, r6, #2
str r6, [sp, #12]
bne yuv_loop
@ Exit cleanly :-)
add sp, sp, #(11*4) @ remove all custom things from stack
ldmia sp!, { r4 - r12, pc } @ restore callee saved regs and return
const_storage:
@ In order : crv, cbu, - cgu, - cgv, multy
.word 0x00019895, 0x00020469, 0xffff9bb5, 0xffff2fe1, 0x00012A15
rb_clip_dummy:
.byte 0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00
.byte 0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00
.byte 0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00
rb_clip:
.byte 0x00,0x01,0x02,0x03,0x04,0x05,0x06,0x07,0x08,0x09,0x0a,0x0b,0x0c,0x0d,0x0e,0x0f
.byte 0x10,0x11,0x12,0x13,0x14,0x15,0x16,0x17,0x18,0x19,0x1a,0x1b,0x1c,0x1d,0x1e,0x1f
.byte 0x1f,0x1f,0x1f,0x1f,0x1f,0x1f,0x1f,0x1f,0x1f,0x1f,0x1f,0x1f,0x1f,0x1f,0x1f,0x1f
.byte 0x1f,0x1f,0x1f,0x1f,0x1f,0x1f,0x1f,0x1f,0x1f,0x1f,0x1f,0x1f,0x1f,0x1f,0x1f,0x1f
.byte 0x1f,0x1f,0x1f,0x1f,0x1f,0x1f,0x1f,0x1f,0x1f,0x1f,0x1f,0x1f,0x1f,0x1f,0x1f,0x1f
g_clip_dummy:
.byte 0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00
.byte 0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00
.byte 0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00
.byte 0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00
.byte 0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00
.byte 0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00
g_clip:
.byte 0x00,0x01,0x02,0x03,0x04,0x05,0x06,0x07,0x08,0x09,0x0a,0x0b,0x0c,0x0d,0x0e,0x0f
.byte 0x10,0x11,0x12,0x13,0x14,0x15,0x16,0x17,0x18,0x19,0x1a,0x1b,0x1c,0x1d,0x1e,0x1f
.byte 0x20,0x21,0x22,0x23,0x24,0x25,0x26,0x27,0x28,0x29,0x2a,0x2b,0x2c,0x2d,0x2e,0x2f
.byte 0x30,0x31,0x32,0x33,0x34,0x35,0x36,0x37,0x38,0x39,0x3a,0x3b,0x3c,0x3d,0x3e,0x3f
.byte 0x3f,0x3f,0x3f,0x3f,0x3f,0x3f,0x3f,0x3f,0x3f,0x3f,0x3f,0x3f,0x3f,0x3f,0x3f,0x3f
.byte 0x3f,0x3f,0x3f,0x3f,0x3f,0x3f,0x3f,0x3f,0x3f,0x3f,0x3f,0x3f,0x3f,0x3f,0x3f,0x3f
.byte 0x3f,0x3f,0x3f,0x3f,0x3f,0x3f,0x3f,0x3f,0x3f,0x3f,0x3f,0x3f,0x3f,0x3f,0x3f,0x3f
.byte 0x3f,0x3f,0x3f,0x3f,0x3f,0x3f,0x3f,0x3f,0x3f,0x3f,0x3f,0x3f,0x3f,0x3f,0x3f,0x3f
.byte 0x3f,0x3f,0x3f,0x3f,0x3f,0x3f,0x3f,0x3f,0x3f,0x3f,0x3f,0x3f,0x3f,0x3f,0x3f,0x3f
.byte 0x3f,0x3f,0x3f,0x3f,0x3f,0x3f,0x3f,0x3f,0x3f,0x3f,0x3f,0x3f,0x3f,0x3f,0x3f,0x3f
#endif