169 lines
6.0 KiB
C++
169 lines
6.0 KiB
C++
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/*
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* Copyright (c) 2011, Code Aurora Forum. All rights reserved.
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*
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* Redistribution and use in source and binary forms, with or without
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* modification, are permitted provided that the following conditions are
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* met:
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* * Redistributions of source code must retain the above copyright
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* notice, this list of conditions and the following disclaimer.
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* * Redistributions in binary form must reproduce the above
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* copyright notice, this list of conditions and the following
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* disclaimer in the documentation and/or other materials provided
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* with the distribution.
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* * Neither the name of Code Aurora Forum, Inc. nor the names of its
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* contributors may be used to endorse or promote products derived
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* from this software without specific prior written permission.
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*
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* THIS SOFTWARE IS PROVIDED "AS IS" AND ANY EXPRESS OR IMPLIED
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* WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF
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* MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND NON-INFRINGEMENT
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* ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT OWNER OR CONTRIBUTORS
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* BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
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* CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
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* SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR
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* BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY,
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* WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE
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* OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN
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* IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
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*/
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#define LOG_TAG "copybit"
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#include <cutils/log.h>
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#include <stdlib.h>
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#include <errno.h>
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#include "software_converter.h"
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#include "gralloc_priv.h"
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/** Convert YV12 to YCrCb_420_SP */
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int convertYV12toYCrCb420SP(const copybit_image_t *src)
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{
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private_handle_t* hnd = (private_handle_t*)src->handle;
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if(hnd == NULL){
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LOGE("Invalid handle");
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return -1;
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}
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// Please refer to the description of YV12 in hardware.h
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// for the formulae used to calculate buffer sizes and offsets
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// In a copybit_image_t, w is the stride and
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// stride - horiz_padding is the actual width
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// vertical stride is the same as height, so not considered
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unsigned int stride = src->w;
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unsigned int width = src->w - src->horiz_padding;
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unsigned int height = src->h;
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unsigned int padding = src->horiz_padding;
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unsigned int y_size = stride * src->h;
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unsigned int c_width = ALIGN(stride/2, 16);
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unsigned int c_size = c_width * src->h/2;
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unsigned char* chroma = (unsigned char *) (hnd->base + y_size);
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unsigned int tempBufSize = c_size * 2;
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unsigned char* tempBuf = (unsigned char*) malloc (tempBufSize);
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if(tempBuf == NULL) {
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LOGE("Failed to allocate temporary buffer");
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return -errno;
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}
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#ifdef __ARM_HAVE_NEON
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/* copy into temp buffer */
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unsigned char * t1 = chroma;
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unsigned char * t2 = tempBuf;
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#ifdef TARGET_7x27A
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// Since the Sparrow core on 7x27A has a performance issue
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// with reading from uncached memory using Neon instructions,
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// use regular ARM instructions to copy the buffer on this
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// target. There is no issue with storing, hence using
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// Neon instructions for interleaving
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for(unsigned int i=0; i < (tempBufSize>>5); i++) {
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__asm__ __volatile__ (
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"LDMIA %0!, {r3 - r10} \n"
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"STMIA %1!, {r3 - r10} \n"
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:"+r"(t1), "+r"(t2)
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:
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:"memory","r3","r4","r5",
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"r6","r7","r8","r9","r10"
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);
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}
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#else
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for(unsigned int i=0; i < (tempBufSize>>5); i++) {
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__asm__ __volatile__ (
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"vld1.u8 {d0-d3}, [%0]! \n"
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"vst1.u8 {d0-d3}, [%1]! \n"
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:"+r"(t1), "+r"(t2)
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:
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:"memory","d0","d1","d2","d3"
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);
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}
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#endif //TARGET_7x27A
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/* interleave */
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if(!padding) {
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t1 = chroma;
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t2 = tempBuf;
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unsigned char * t3 = t2 + tempBufSize/2;
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for(unsigned int i=0; i < (tempBufSize/2)>>3; i++) {
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__asm__ __volatile__ (
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"vld1.u8 d0, [%0]! \n"
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"vld1.u8 d1, [%1]! \n"
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"vst2.u8 {d0, d1}, [%2]! \n"
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:"+r"(t2), "+r"(t3), "+r"(t1)
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:
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:"memory","d0","d1"
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);
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}
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}
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#else //__ARM_HAVE_NEON
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memcpy(tempBuf, chroma, tempBufSize);
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if(!padding) {
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for(unsigned int i = 0; i< tempBufSize/2; i++) {
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chroma[i*2] = tempBuf[i];
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chroma[i*2+1] = tempBuf[i+tempBufSize/2];
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}
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}
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#endif
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// If the image is not aligned to 16 pixels,
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// convert using the C routine below
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// r1 tracks the row of the source buffer
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// r2 tracks the row of the destination buffer
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// The width/2 checks are to avoid copying
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// from the padding
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if(padding) {
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unsigned int r1 = 0, r2 = 0, i = 0, j = 0;
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while(r1 < height/2) {
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if(j == width/2) {
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j = 0;
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r2++;
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continue;
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}
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if (j+1 == width/2) {
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chroma[r2*c_width + j] = tempBuf[r1*c_width+i];
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r2++;
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chroma[r2*c_width] = tempBuf[r1*c_width+i+c_size];
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j = 1;
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} else {
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chroma[r2*c_width + j] = tempBuf[r1*c_width+i];
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chroma[r2*c_width + j + 1] = tempBuf[r1*c_width+i+c_size];
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j+=2;
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}
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i++;
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if (i == width/2 ) {
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i = 0;
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r1++;
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}
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}
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}
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if(tempBuf)
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free(tempBuf);
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return 0;
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}
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