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Remove YUV blitting functions and LCD modes
None of this is needed now that mpegplayer is gone. Change-Id: I360366db8513e4d988021e8d7b7d8eb09930efb8
This commit is contained in:
Aidan MacDonald
parent
b371ff1f47
commit
fe6aa21e9e
54 changed files with 3 additions and 9638 deletions
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@ -1,287 +0,0 @@
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/***************************************************************************
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* __________ __ ___.
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* Open \______ \ ____ ____ | | _\_ |__ _______ ___
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* Source | _// _ \_/ ___\| |/ /| __ \ / _ \ \/ /
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* Jukebox | | ( <_> ) \___| < | \_\ ( <_> > < <
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* Firmware |____|_ /\____/ \___ >__|_ \|___ /\____/__/\_ \
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* \/ \/ \/ \/ \/
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* $Id:$
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*
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* Copyright (C) 2010-2011 by Andree Buschmann
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*
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* Generic asm helper function used by YUV blitting.
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*
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* This program is free software; you can redistribute it and/or
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* modify it under the terms of the GNU General Public License
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* as published by the Free Software Foundation; either version 2
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* of the License, or (at your option) any later version.
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*
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* This software is distributed on an "AS IS" basis, WITHOUT WARRANTY OF ANY
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* KIND, either express or implied.
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*
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****************************************************************************/
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#include "config.h"
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#include "cpu.h"
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/****************************************************************************
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* #define FORCE_FIFO_WAIT
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*
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* This is not needed in YUV blitting when the LCD IF is fast enough. In this
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* case YUV-to-RGB conversion per pixel needs longer than the transfer of a
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* pixel via the LCD IF.
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****************************************************************************/
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#include "config.h"
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/* Set FIFO wait for both iPod Color and iPod nano1G until we know for which
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* devices we can switch this off. */
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#define FORCE_FIFO_WAIT
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.section .icode, "ax", %progbits
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/****************************************************************************
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* extern void lcd_write_yuv420_lines(unsigned char const * const src[3],
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* const unsigned LCD_BASE,
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* int width,
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* int stride);
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*
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* Conversion from Motion JPEG and MPEG Y'PbPr to RGB is:
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* |R| |1.164 0.000 1.596| |Y' - 16|
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* |G| = |1.164 -0.391 -0.813| |Pb - 128|
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* |B| |1.164 2.018 0.000| |Pr - 128|
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*
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* Scaled, normalized, rounded and tweaked to yield RGB 565:
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* |R| |74 0 101| |Y' - 16| >> 9
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* |G| = |74 -24 -51| |Cb - 128| >> 8
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* |B| |74 128 0| |Cr - 128| >> 9
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*
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* Converts two lines from YUV to RGB565 and writes to LCD at once. First loop
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* loads Cb/Cr, calculates the chroma offset and saves them to buffer. Within
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* the second loop these chroma offset are reloaded from buffer. Within each
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* loop two pixels are calculated and written to LCD.
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*/
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.align 2
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.global lcd_write_yuv420_lines
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.type lcd_write_yuv420_lines, %function
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lcd_write_yuv420_lines:
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/* r0 = src = yuv_src */
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/* r1 = dst = LCD_BASE */
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/* r2 = width */
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/* r3 = stride */
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stmfd sp!, { r4-r10, lr } /* save non-scratch */
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ldmia r0, { r9, r10, r12 } /* r9 = yuv_src[0] = Y'_p */
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/* r10 = yuv_src[1] = Cb_p */
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/* r12 = yuv_src[2] = Cr_p */
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add r3, r9, r3 /* r3 = &ysrc[stride] */
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add r4, r2, r2, asr #1 /* chroma buffer lenght = width/2 *3 */
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mov r4, r4, asl #2 /* use words for str/ldm possibility */
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add r4, r4, #19 /* plus room for 4 additional words, */
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bic r4, r4, #3 /* rounded up to multiples of 4 byte */
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sub sp, sp, r4 /* and allocate on stack */
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stmia sp, {r1-r4} /* LCD_BASE, width, &ysrc[stride], stack_alloc */
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mov r7, r2 /* r7 = loop count */
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add r8, sp, #16 /* chroma buffer */
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add lr, r1, #0x100 /* LCD data port = LCD2_BASE + 0x100 */
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/* 1st loop start */
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10: /* loop start */
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ldrb r0, [r10], #1 /* r0 = *usrc++ = *Cb_p++ */
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ldrb r1, [r12], #1 /* r1 = *vsrc++ = *Cr_p++ */
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sub r0, r0, #128 /* r0 = Cb-128 */
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sub r1, r1, #128 /* r1 = Cr-128 */
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add r2, r1, r1, asl #1 /* r2 = Cr*51 + Cb*24 */
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add r2, r2, r2, asl #4
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add r2, r2, r0, asl #3
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add r2, r2, r0, asl #4
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add r4, r1, r1, asl #2 /* r1 = Cr*101 */
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add r4, r4, r1, asl #5
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add r1, r4, r1, asl #6
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add r1, r1, #256 /* r1 = rv = (r1 + 256) >> 9 */
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mov r1, r1, asr #9
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rsb r2, r2, #128 /* r2 = guv = (-r2 + 128) >> 8 */
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mov r2, r2, asr #8
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add r0, r0, #2 /* r0 = bu = (Cb*128 + 256) >> 9 */
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mov r0, r0, asr #2
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stmia r8!, {r0-r2} /* store r0, r1 and r2 to chroma buffer */
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/* 1st loop, first pixel */
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ldrb r5, [r9], #1 /* r5 = *ysrc++ = *Y'_p++ */
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sub r5, r5, #16 /* r5 = (Y'-16) * 74 */
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add r3, r5, r5, asl #2
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add r5, r3, r5, asl #5
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add r6, r1, r5, asr #8 /* r6 = r = (Y >> 9) + rv */
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add r3, r2, r5, asr #7 /* r3 = g = (Y >> 8) + guv */
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add r4, r0, r5, asr #8 /* r4 = b = (Y >> 9) + bu */
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orr r5, r6, r4 /* check if clamping is needed... */
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orr r5, r5, r3, asr #1 /* ...at all */
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cmp r5, #31
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bls 15f /* -> no clamp */
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cmp r6, #31 /* clamp r */
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mvnhi r6, r6, asr #31
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andhi r6, r6, #31
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cmp r3, #63 /* clamp g */
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mvnhi r3, r3, asr #31
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andhi r3, r3, #63
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cmp r4, #31 /* clamp b */
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mvnhi r4, r4, asr #31
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andhi r4, r4, #31
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15: /* no clamp */
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/* calculate pixel_1 and save to r4 for later pixel packing */
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orr r4, r4, r3, lsl #5 /* pixel_1 = r<<11 | g<<5 | b */
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orr r4, r4, r6, lsl #11 /* r4 = pixel_1 */
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/* 1st loop, second pixel */
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ldrb r5, [r9], #1 /* r5 = *ysrc++ = *Y'_p++ */
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sub r5, r5, #16 /* r5 = (Y'-16) * 74 */
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add r3, r5, r5, asl #2
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add r5, r3, r5, asl #5
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add r6, r1, r5, asr #8 /* r6 = r = (Y >> 9) + rv */
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add r3, r2, r5, asr #7 /* r3 = g = (Y >> 8) + guv */
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add r5, r0, r5, asr #8 /* r5 = b = (Y >> 9) + bu */
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orr r0, r6, r5 /* check if clamping is needed... */
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orr r0, r0, r3, asr #1 /* ...at all */
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cmp r0, #31
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bls 15f /* -> no clamp */
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cmp r6, #31 /* clamp r */
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mvnhi r6, r6, asr #31
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andhi r6, r6, #31
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cmp r3, #63 /* clamp g */
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mvnhi r3, r3, asr #31
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andhi r3, r3, #63
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cmp r5, #31 /* clamp b */
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mvnhi r5, r5, asr #31
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andhi r5, r5, #31
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15: /* no clamp */
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/* calculate pixel_2 and pack with pixel_1 before writing */
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orr r5, r5, r3, lsl #5 /* pixel_2 = r<<11 | g<<5 | b */
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orr r5, r5, r6, lsl #11 /* r5 = pixel_2 */
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#ifdef FORCE_FIFO_WAIT
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/* wait for FIFO half full */
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.fifo_wait1:
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ldr r3, [lr, #-0xE0] /* while !(LCD2_BLOCK_CTRL & 0x1000000); */
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tst r3, #0x1000000
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beq .fifo_wait1
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#endif
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mov r3, r4, lsl #8 /* swap pixel_1 */
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and r3, r3, #0xff00
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add r4, r3, r4, lsr #8
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orr r4, r4, r5, lsl #24 /* swap pixel_2 and pack with pixel_1 */
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mov r5, r5, lsr #8
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orr r4, r4, r5, lsl #16
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str r4, [lr] /* write pixel_1 and pixel_2 */
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subs r7, r7, #2 /* check for loop end */
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bgt 10b /* back to beginning */
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/* 1st loop end */
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/* Reload several registers for pointer rewinding for next loop */
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add r8, sp, #16 /* chroma buffer */
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ldmia sp, { r1, r7, r9} /* r1 = LCD_BASE */
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/* r7 = loop count */
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/* r9 = &ysrc[stride] */
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/* 2nd loop start */
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20: /* loop start */
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/* restore r0 (bu), r1 (rv) and r2 (guv) from chroma buffer */
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ldmia r8!, {r0-r2}
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/* 2nd loop, first pixel */
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ldrb r5, [r9], #1 /* r5 = *ysrc++ = *Y'_p++ */
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sub r5, r5, #16 /* r5 = (Y'-16) * 74 */
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add r3, r5, r5, asl #2
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add r5, r3, r5, asl #5
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add r6, r1, r5, asr #8 /* r6 = r = (Y >> 9) + rv */
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add r3, r2, r5, asr #7 /* r3 = g = (Y >> 8) + guv */
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add r4, r0, r5, asr #8 /* r4 = b = (Y >> 9) + bu */
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orr r5, r6, r4 /* check if clamping is needed... */
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orr r5, r5, r3, asr #1 /* ...at all */
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cmp r5, #31
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bls 15f /* -> no clamp */
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cmp r6, #31 /* clamp r */
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mvnhi r6, r6, asr #31
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andhi r6, r6, #31
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cmp r3, #63 /* clamp g */
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mvnhi r3, r3, asr #31
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andhi r3, r3, #63
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cmp r4, #31 /* clamp b */
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mvnhi r4, r4, asr #31
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andhi r4, r4, #31
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15: /* no clamp */
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/* calculate pixel_1 and save to r4 for later pixel packing */
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orr r4, r4, r3, lsl #5 /* pixel_1 = r<<11 | g<<5 | b */
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orr r4, r4, r6, lsl #11 /* r4 = pixel_1 */
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/* 2nd loop, second pixel */
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ldrb r5, [r9], #1 /* r5 = *ysrc++ = *Y'_p++ */
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sub r5, r5, #16 /* r5 = (Y'-16) * 74 */
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add r3, r5, r5, asl #2
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add r5, r3, r5, asl #5
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add r6, r1, r5, asr #8 /* r6 = r = (Y >> 9) + rv */
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add r3, r2, r5, asr #7 /* r3 = g = (Y >> 8) + guv */
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add r5, r0, r5, asr #8 /* r5 = b = (Y >> 9) + bu */
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orr r0, r6, r5 /* check if clamping is needed... */
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orr r0, r0, r3, asr #1 /* ...at all */
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cmp r0, #31
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bls 15f /* -> no clamp */
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cmp r6, #31 /* clamp r */
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mvnhi r6, r6, asr #31
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andhi r6, r6, #31
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cmp r3, #63 /* clamp g */
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mvnhi r3, r3, asr #31
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andhi r3, r3, #63
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cmp r5, #31 /* clamp b */
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mvnhi r5, r5, asr #31
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andhi r5, r5, #31
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15: /* no clamp */
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/* calculate pixel_2 and pack with pixel_1 before writing */
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orr r5, r5, r3, lsl #5 /* pixel_2 = r<<11 | g<<5 | b */
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orr r5, r5, r6, lsl #11 /* r5 = pixel_2 */
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#ifdef FORCE_FIFO_WAIT
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/* wait for FIFO half full */
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.fifo_wait2:
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ldr r3, [lr, #-0xE0] /* while !(LCD2_BLOCK_CTRL & 0x1000000); */
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tst r3, #0x1000000
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beq .fifo_wait2
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#endif
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mov r3, r4, lsl #8 /* swap pixel_1 */
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and r3, r3, #0xff00
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add r4, r3, r4, lsr #8
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orr r4, r4, r5, lsl #24 /* swap pixel_2 and pack with pixel_1 */
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mov r5, r5, lsr #8
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orr r4, r4, r5, lsl #16
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str r4, [lr] /* write pixel_1 and pixel_2 */
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subs r7, r7, #2 /* check for loop end */
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bgt 20b /* back to beginning */
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/* 2nd loop end */
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ldr r3, [sp, #12]
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add sp, sp, r3 /* deallocate buffer */
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ldmpc regs=r4-r10 /* restore registers */
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.ltorg
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.size lcd_write_yuv420_lines, .-lcd_write_yuv420_lines
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@ -202,62 +202,6 @@ static void lcd_setup_drawing_region(int x, int y, int width, int height)
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}
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}
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/* Line write helper function for lcd_yuv_blit. Writes two lines of yuv420. */
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extern void lcd_write_yuv420_lines(unsigned char const * const src[3],
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const unsigned int lcd_baseadress,
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int width,
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int stride);
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/* Performance function to blit a YUV bitmap directly to the LCD */
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void lcd_blit_yuv(unsigned char * const src[3],
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int src_x, int src_y, int stride,
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int x, int y, int width, int height)
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{
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int z;
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unsigned char const * yuv_src[3];
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width = (width + 1) & ~1; /* ensure width is even */
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height = (height + 1) & ~1; /* ensure height is even */
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lcd_setup_drawing_region(x, y, width, height);
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z = stride * src_y;
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yuv_src[0] = src[0] + z + src_x;
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yuv_src[1] = src[1] + (z >> 2) + (src_x >> 1);
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yuv_src[2] = src[2] + (yuv_src[1] - src[1]);
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while (height > 0) {
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int r, h, pixels_to_write;
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pixels_to_write = (width * height) * 2;
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h = height;
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/* calculate how much we can do in one go */
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if (pixels_to_write > 0x10000) {
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h = ((0x10000/2) / width) & ~1; /* ensure h is even */
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pixels_to_write = (width * h) * 2;
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}
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LCD2_BLOCK_CTRL = 0x10000080;
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LCD2_BLOCK_CONFIG = 0xc0010000 | (pixels_to_write - 1);
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LCD2_BLOCK_CTRL = 0x34000000;
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r = h>>1; /* lcd_write_yuv420_lines writes two lines at once */
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do {
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lcd_write_yuv420_lines(yuv_src, LCD2_BASE, width, stride);
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yuv_src[0] += stride << 1;
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yuv_src[1] += stride >> 1;
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yuv_src[2] += stride >> 1;
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} while (--r > 0);
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/* transfer of pixels_to_write bytes finished */
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while (!(LCD2_BLOCK_CTRL & LCD2_BLOCK_READY));
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LCD2_BLOCK_CONFIG = 0;
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height -= h;
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}
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}
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/* Helper function writes 'count' consecutive pixels from src to LCD IF */
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static void lcd_write_line(int count, unsigned long *src)
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{
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@ -63,240 +63,3 @@ lcd_write_data: /* r1 = pixel count, must be even */
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strne r3, [lr]
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ldmpc regs=r4
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/****************************************************************************
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* extern void lcd_write_yuv420_lines(unsigned char const * const src[3],
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* unsigned bcmaddr
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* int width,
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* int stride);
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*
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* Conversion from Motion JPEG and MPEG Y'PbPr to RGB is:
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* |R| |1.164 0.000 1.596| |Y' - 16|
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* |G| = |1.164 -0.391 -0.813| |Pb - 128|
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* |B| |1.164 2.018 0.000| |Pr - 128|
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*
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* Scaled, normalized, rounded and tweaked to yield RGB 565:
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* |R| |74 0 101| |Y' - 16| >> 9
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* |G| = |74 -24 -51| |Cb - 128| >> 8
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* |B| |74 128 0| |Cr - 128| >> 9
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*
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* Converts two lines from YUV to RGB565 and writes to BCM at once. First loop
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* loads Cb/Cr, calculates the chroma offset and saves them to buffer. Within
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* the second loop these chroma offset are reloaded from buffer.
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* Within each loop two pixels are calculated and written to BCM. Before each
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* loop the desired destination address is transmitted to BCM.
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*/
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.align 2
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.global lcd_write_yuv420_lines
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.type lcd_write_yuv420_lines, %function
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lcd_write_yuv420_lines:
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/* r0 = src = yuv_src */
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/* r1 = dst = bcmaddr */
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/* r2 = width */
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/* r3 = stride */
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stmfd sp!, { r4-r10, lr } /* save non-scratch */
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ldmia r0, { r9, r10, r12 } /* r9 = yuv_src[0] = Y'_p */
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/* r10 = yuv_src[1] = Cb_p */
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/* r12 = yuv_src[2] = Cr_p */
|
||||
add r3, r9, r3 /* r3 = &ysrc[stride] */
|
||||
add r4, r2, r2, asr #1 /* chroma buffer lenght = width/2 *3 */
|
||||
mov r4, r4, asl #2 /* use words for str/ldm possibility */
|
||||
add r4, r4, #19 /* plus room for 4 additional words, */
|
||||
bic r4, r4, #3 /* rounded up to multiples of 4 byte */
|
||||
sub sp, sp, r4 /* and allocate on stack */
|
||||
stmia sp, {r1-r4} /* bcmaddr, width, &ysrc[stride], stack_alloc */
|
||||
|
||||
mov r7, r2 /* r7 = loop count */
|
||||
add r8, sp, #16 /* chroma buffer */
|
||||
mov lr, #0x30000000 /* LCD data port */
|
||||
|
||||
/* The following writes dest address to BCM and waits for write ready */
|
||||
orr r2, lr, #0x00010000 /* r2 = BCM_WR_ADDR32 */
|
||||
orr r6, lr, #0x00030000 /* r6 = BCM_CONTROL */
|
||||
str r1, [r2] /* BCM_WR_ADDR32 = bcmaddr */
|
||||
.busy_1:
|
||||
ldrh r1, [r6] /* while (!(BCM_CONTROL & 0x2)) */
|
||||
tst r1, #0x2
|
||||
beq .busy_1
|
||||
|
||||
/* 1st loop start */
|
||||
10: /* loop start */
|
||||
|
||||
ldrb r0, [r10], #1 /* r0 = *usrc++ = *Cb_p++ */
|
||||
ldrb r1, [r12], #1 /* r1 = *vsrc++ = *Cr_p++ */
|
||||
|
||||
sub r0, r0, #128 /* r0 = Cb-128 */
|
||||
sub r1, r1, #128 /* r1 = Cr-128 */
|
||||
|
||||
add r2, r1, r1, asl #1 /* r2 = Cr*51 + Cb*24 */
|
||||
add r2, r2, r2, asl #4
|
||||
add r2, r2, r0, asl #3
|
||||
add r2, r2, r0, asl #4
|
||||
|
||||
add r4, r1, r1, asl #2 /* r1 = Cr*101 */
|
||||
add r4, r4, r1, asl #5
|
||||
add r1, r4, r1, asl #6
|
||||
|
||||
add r1, r1, #256 /* r1 = rv = (r1 + 256) >> 9 */
|
||||
mov r1, r1, asr #9
|
||||
rsb r2, r2, #128 /* r2 = guv = (-r2 + 128) >> 8 */
|
||||
mov r2, r2, asr #8
|
||||
add r0, r0, #2 /* r0 = bu = (Cb*128 + 256) >> 9 */
|
||||
mov r0, r0, asr #2
|
||||
stmia r8!, {r0-r2} /* store r0, r1 and r2 to chroma buffer */
|
||||
|
||||
/* 1st loop, first pixel */
|
||||
ldrb r5, [r9], #1 /* r5 = *ysrc++ = *Y'_p++ */
|
||||
sub r5, r5, #16 /* r5 = (Y'-16) * 74 */
|
||||
add r3, r5, r5, asl #2
|
||||
add r5, r3, r5, asl #5
|
||||
|
||||
add r6, r1, r5, asr #8 /* r6 = r = (Y >> 9) + rv */
|
||||
add r3, r2, r5, asr #7 /* r3 = g = (Y >> 8) + guv */
|
||||
add r4, r0, r5, asr #8 /* r4 = b = (Y >> 9) + bu */
|
||||
|
||||
orr r5, r6, r4 /* check if clamping is needed... */
|
||||
orr r5, r5, r3, asr #1 /* ...at all */
|
||||
cmp r5, #31
|
||||
bls 15f /* -> no clamp */
|
||||
cmp r6, #31 /* clamp r */
|
||||
mvnhi r6, r6, asr #31
|
||||
andhi r6, r6, #31
|
||||
cmp r3, #63 /* clamp g */
|
||||
mvnhi r3, r3, asr #31
|
||||
andhi r3, r3, #63
|
||||
cmp r4, #31 /* clamp b */
|
||||
mvnhi r4, r4, asr #31
|
||||
andhi r4, r4, #31
|
||||
15: /* no clamp */
|
||||
|
||||
/* calculate pixel_1 and save to r5 for later pixel packing */
|
||||
orr r4, r4, r3, lsl #5 /* pixel_1 = r<<11 | g<<5 | b */
|
||||
orr r5, r4, r6, lsl #11 /* r5 = pixel_1 */
|
||||
|
||||
/* 1st loop, second pixel */
|
||||
ldrb r4, [r9], #1 /* r4 = *ysrc++ = *Y'_p++ */
|
||||
sub r4, r4, #16 /* r4 = (Y'-16) * 74 */
|
||||
add r3, r4, r4, asl #2
|
||||
add r4, r3, r4, asl #5
|
||||
|
||||
add r6, r1, r4, asr #8 /* r6 = r = (Y >> 9) + rv */
|
||||
add r3, r2, r4, asr #7 /* r3 = g = (Y >> 8) + guv */
|
||||
add r4, r0, r4, asr #8 /* r4 = b = (Y >> 9) + bu */
|
||||
|
||||
orr r0, r6, r4 /* check if clamping is needed... */
|
||||
orr r0, r0, r3, asr #1 /* ...at all */
|
||||
cmp r0, #31
|
||||
bls 15f /* -> no clamp */
|
||||
cmp r6, #31 /* clamp r */
|
||||
mvnhi r6, r6, asr #31
|
||||
andhi r6, r6, #31
|
||||
cmp r3, #63 /* clamp g */
|
||||
mvnhi r3, r3, asr #31
|
||||
andhi r3, r3, #63
|
||||
cmp r4, #31 /* clamp b */
|
||||
mvnhi r4, r4, asr #31
|
||||
andhi r4, r4, #31
|
||||
15: /* no clamp */
|
||||
|
||||
/* calculate pixel_2 and pack with pixel_1 before writing */
|
||||
orr r4, r4, r3, lsl #5 /* pixel_2 = r<<11 | g<<5 | b */
|
||||
orr r4, r4, r6, lsl #11 /* r4 = pixel_2 */
|
||||
orr r4, r5, r4, lsl #16 /* r4 = pixel_2<<16 | pixel_1 */
|
||||
str r4, [lr] /* write packed pixels */
|
||||
|
||||
subs r7, r7, #2 /* check for loop end */
|
||||
bgt 10b /* back to beginning */
|
||||
/* 1st loop end */
|
||||
|
||||
/* Reload several registers for pointer rewinding for next loop */
|
||||
add r8, sp, #16 /* chroma buffer */
|
||||
ldmia sp, { r1, r7, r9} /* r1 = bcmaddr */
|
||||
/* r7 = loop count */
|
||||
/* r9 = &ysrc[stride] */
|
||||
|
||||
/* The following writes dest address to BCM and waits for write ready */
|
||||
orr r2, lr, #0x00010000 /* r2 = BCM_WR_ADDR32 */
|
||||
orr r6, lr, #0x00030000 /* r6 = BCM_CONTROL */
|
||||
add r1, r1, #640 /* dst += (LCD_WIDTH*2) */
|
||||
str r1, [r2] /* BCM_WR_ADDR32 = dst */
|
||||
.busy_2:
|
||||
ldrh r1, [r6] /* while (!(BCM_CONTROL & 0x2)) */
|
||||
tst r1, #0x2
|
||||
beq .busy_2
|
||||
|
||||
|
||||
/* 2nd loop start */
|
||||
20: /* loop start */
|
||||
/* restore r0 (bu), r1 (rv) and r2 (guv) from chroma buffer */
|
||||
ldmia r8!, {r0-r2}
|
||||
|
||||
/* 2nd loop, first pixel */
|
||||
ldrb r5, [r9], #1 /* r5 = *ysrc++ = *Y'_p++ */
|
||||
sub r5, r5, #16 /* r5 = (Y'-16) * 74 */
|
||||
add r3, r5, r5, asl #2
|
||||
add r5, r3, r5, asl #5
|
||||
|
||||
add r6, r1, r5, asr #8 /* r6 = r = (Y >> 9) + rv */
|
||||
add r3, r2, r5, asr #7 /* r3 = g = (Y >> 8) + guv */
|
||||
add r4, r0, r5, asr #8 /* r4 = b = (Y >> 9) + bu */
|
||||
|
||||
orr r5, r6, r4 /* check if clamping is needed... */
|
||||
orr r5, r5, r3, asr #1 /* ...at all */
|
||||
cmp r5, #31
|
||||
bls 15f /* -> no clamp */
|
||||
cmp r6, #31 /* clamp r */
|
||||
mvnhi r6, r6, asr #31
|
||||
andhi r6, r6, #31
|
||||
cmp r3, #63 /* clamp g */
|
||||
mvnhi r3, r3, asr #31
|
||||
andhi r3, r3, #63
|
||||
cmp r4, #31 /* clamp b */
|
||||
mvnhi r4, r4, asr #31
|
||||
andhi r4, r4, #31
|
||||
15: /* no clamp */
|
||||
/* calculate pixel_1 and save to r5 for later pixel packing */
|
||||
orr r4, r4, r3, lsl #5 /* pixel_1 = r<<11 | g<<5 | b */
|
||||
orr r5, r4, r6, lsl #11 /* r5 = pixel_1 */
|
||||
|
||||
/* 2nd loop, second pixel */
|
||||
ldrb r4, [r9], #1 /* r4 = *ysrc++ = *Y'_p++ */
|
||||
sub r4, r4, #16 /* r4 = (Y'-16) * 74 */
|
||||
add r3, r4, r4, asl #2
|
||||
add r4, r3, r4, asl #5
|
||||
|
||||
add r6, r1, r4, asr #8 /* r6 = r = (Y >> 9) + rv */
|
||||
add r3, r2, r4, asr #7 /* r3 = g = (Y >> 8) + guv */
|
||||
add r4, r0, r4, asr #8 /* r4 = b = (Y >> 9) + bu */
|
||||
|
||||
orr r0, r6, r4 /* check if clamping is needed... */
|
||||
orr r0, r0, r3, asr #1 /* ...at all */
|
||||
cmp r0, #31
|
||||
bls 15f /* -> no clamp */
|
||||
cmp r6, #31 /* clamp r */
|
||||
mvnhi r6, r6, asr #31
|
||||
andhi r6, r6, #31
|
||||
cmp r3, #63 /* clamp g */
|
||||
mvnhi r3, r3, asr #31
|
||||
andhi r3, r3, #63
|
||||
cmp r4, #31 /* clamp b */
|
||||
mvnhi r4, r4, asr #31
|
||||
andhi r4, r4, #31
|
||||
15: /* no clamp */
|
||||
|
||||
/* calculate pixel_2 and pack with pixel_1 before writing */
|
||||
orr r4, r4, r3, lsl #5 /* pixel_2 = r<<11 | g<<5 | b */
|
||||
orr r4, r4, r6, lsl #11 /* r4 = pixel_2 */
|
||||
orr r4, r5, r4, lsl #16 /* r4 = pixel_2<<16 | pixel_1 */
|
||||
str r4, [lr] /* write packed pixels */
|
||||
|
||||
subs r7, r7, #2 /* check for loop end */
|
||||
bgt 20b /* back to beginning */
|
||||
/* 2nd loop end */
|
||||
|
||||
ldr r3, [sp, #12]
|
||||
add sp, sp, r3 /* deallocate buffer */
|
||||
ldmpc regs=r4-r10 /* restore registers */
|
||||
|
||||
.ltorg
|
||||
.size lcd_write_yuv420_lines, .-lcd_write_yuv420_lines
|
||||
|
|
|
|||
|
|
@ -439,53 +439,6 @@ void lcd_update(void)
|
|||
lcd_update_rect(0, 0, LCD_WIDTH, LCD_HEIGHT);
|
||||
}
|
||||
|
||||
/* Line write helper function for lcd_yuv_blit. Writes two lines of yuv420. */
|
||||
extern void lcd_write_yuv420_lines(unsigned char const * const src[3],
|
||||
unsigned bcmaddr,
|
||||
int width,
|
||||
int stride);
|
||||
|
||||
/* Performance function to blit a YUV bitmap directly to the LCD */
|
||||
void lcd_blit_yuv(unsigned char * const src[3],
|
||||
int src_x, int src_y, int stride,
|
||||
int x, int y, int width, int height)
|
||||
{
|
||||
unsigned bcmaddr;
|
||||
off_t z;
|
||||
unsigned char const * yuv_src[3];
|
||||
|
||||
#ifdef HAVE_LCD_SLEEP
|
||||
if (!lcd_state.display_on)
|
||||
return;
|
||||
#endif
|
||||
|
||||
/* Sorry, but width and height must be >= 2 or else */
|
||||
width &= ~1;
|
||||
|
||||
z = stride * src_y;
|
||||
yuv_src[0] = src[0] + z + src_x;
|
||||
yuv_src[1] = src[1] + (z >> 2) + (src_x >> 1);
|
||||
yuv_src[2] = src[2] + (yuv_src[1] - src[1]);
|
||||
|
||||
/* Prevent the tick from triggering BCM updates while we're writing. */
|
||||
lcd_block_tick();
|
||||
|
||||
bcmaddr = BCMA_CMDPARAM + (LCD_WIDTH*2) * y + (x << 1);
|
||||
height >>= 1;
|
||||
|
||||
do
|
||||
{
|
||||
lcd_write_yuv420_lines(yuv_src, bcmaddr, width, stride);
|
||||
bcmaddr += (LCD_WIDTH*4); /* Skip up two lines */
|
||||
yuv_src[0] += stride << 1;
|
||||
yuv_src[1] += stride >> 1; /* Skip down one chroma line */
|
||||
yuv_src[2] += stride >> 1;
|
||||
}
|
||||
while (--height > 0);
|
||||
|
||||
lcd_unblock_and_update();
|
||||
}
|
||||
|
||||
#ifdef HAVE_LCD_SLEEP
|
||||
/* Executes a BCM command immediately and waits for it to complete.
|
||||
Other BCM commands (eg. LCD updates or lcd_tick) must not interfere.
|
||||
|
|
|
|||
Loading…
Add table
Add a link
Reference in a new issue