/* * Copyright (C) 2001-2011 Michael Niedermayer * * This file is part of FFmpeg. * * FFmpeg is free software; you can redistribute it and/or * modify it under the terms of the GNU Lesser General Public * License as published by the Free Software Foundation; either * version 2.1 of the License, or (at your option) any later version. * * FFmpeg is distributed in the hope that it will be useful, * but WITHOUT ANY WARRANTY; without even the implied warranty of * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU * Lesser General Public License for more details. * * You should have received a copy of the GNU Lesser General Public * License along with FFmpeg; if not, write to the Free Software * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA */ #include #include #include #include #include "libavutil/avassert.h" #include "libavutil/avutil.h" #include "libavutil/bswap.h" #include "libavutil/cpu.h" #include "libavutil/imgutils.h" #include "libavutil/intreadwrite.h" #include "libavutil/mathematics.h" #include "libavutil/pixdesc.h" #include "config.h" #include "rgb2rgb.h" #include "swscale_internal.h" #include "swscale.h" DECLARE_ALIGNED(8, const uint8_t, ff_dither_8x8_128)[9][8] = { { 36, 68, 60, 92, 34, 66, 58, 90, }, { 100, 4, 124, 28, 98, 2, 122, 26, }, { 52, 84, 44, 76, 50, 82, 42, 74, }, { 116, 20, 108, 12, 114, 18, 106, 10, }, { 32, 64, 56, 88, 38, 70, 62, 94, }, { 96, 0, 120, 24, 102, 6, 126, 30, }, { 48, 80, 40, 72, 54, 86, 46, 78, }, { 112, 16, 104, 8, 118, 22, 110, 14, }, { 36, 68, 60, 92, 34, 66, 58, 90, }, }; DECLARE_ALIGNED(8, static const uint8_t, sws_pb_64)[8] = { 64, 64, 64, 64, 64, 64, 64, 64 }; static void gamma_convert(uint8_t * src[], int width, uint16_t *gamma) { int i; uint16_t *src1 = (uint16_t*)src[0]; for (i = 0; i < width; ++i) { uint16_t r = AV_RL16(src1 + i*4 + 0); uint16_t g = AV_RL16(src1 + i*4 + 1); uint16_t b = AV_RL16(src1 + i*4 + 2); AV_WL16(src1 + i*4 + 0, gamma[r]); AV_WL16(src1 + i*4 + 1, gamma[g]); AV_WL16(src1 + i*4 + 2, gamma[b]); } } static av_always_inline void fillPlane(uint8_t *plane, int stride, int width, int height, int y, uint8_t val) { int i; uint8_t *ptr = plane + stride * y; for (i = 0; i < height; i++) { memset(ptr, val, width); ptr += stride; } } static void hScale16To19_c(SwsContext *c, int16_t *_dst, int dstW, const uint8_t *_src, const int16_t *filter, const int32_t *filterPos, int filterSize) { const AVPixFmtDescriptor *desc = av_pix_fmt_desc_get(c->srcFormat); int i; int32_t *dst = (int32_t *) _dst; const uint16_t *src = (const uint16_t *) _src; int bits = desc->comp[0].depth - 1; int sh = bits - 4; if((isAnyRGB(c->srcFormat) || c->srcFormat==AV_PIX_FMT_PAL8) && desc->comp[0].depth<16) sh= 9; for (i = 0; i < dstW; i++) { int j; int srcPos = filterPos[i]; int val = 0; for (j = 0; j < filterSize; j++) { val += src[srcPos + j] * filter[filterSize * i + j]; } // filter=14 bit, input=16 bit, output=30 bit, >> 11 makes 19 bit dst[i] = FFMIN(val >> sh, (1 << 19) - 1); } } static void hScale16To15_c(SwsContext *c, int16_t *dst, int dstW, const uint8_t *_src, const int16_t *filter, const int32_t *filterPos, int filterSize) { const AVPixFmtDescriptor *desc = av_pix_fmt_desc_get(c->srcFormat); int i; const uint16_t *src = (const uint16_t *) _src; int sh = desc->comp[0].depth - 1; if(sh<15) sh= isAnyRGB(c->srcFormat) || c->srcFormat==AV_PIX_FMT_PAL8 ? 13 : (desc->comp[0].depth - 1); for (i = 0; i < dstW; i++) { int j; int srcPos = filterPos[i]; int val = 0; for (j = 0; j < filterSize; j++) { val += src[srcPos + j] * filter[filterSize * i + j]; } // filter=14 bit, input=16 bit, output=30 bit, >> 15 makes 15 bit dst[i] = FFMIN(val >> sh, (1 << 15) - 1); } } // bilinear / bicubic scaling static void hScale8To15_c(SwsContext *c, int16_t *dst, int dstW, const uint8_t *src, const int16_t *filter, const int32_t *filterPos, int filterSize) { int i; for (i = 0; i < dstW; i++) { int j; int srcPos = filterPos[i]; int val = 0; for (j = 0; j < filterSize; j++) { val += ((int)src[srcPos + j]) * filter[filterSize * i + j]; } dst[i] = FFMIN(val >> 7, (1 << 15) - 1); // the cubic equation does overflow ... } } static void hScale8To19_c(SwsContext *c, int16_t *_dst, int dstW, const uint8_t *src, const int16_t *filter, const int32_t *filterPos, int filterSize) { int i; int32_t *dst = (int32_t *) _dst; for (i = 0; i < dstW; i++) { int j; int srcPos = filterPos[i]; int val = 0; for (j = 0; j < filterSize; j++) { val += ((int)src[srcPos + j]) * filter[filterSize * i + j]; } dst[i] = FFMIN(val >> 3, (1 << 19) - 1); // the cubic equation does overflow ... } } // FIXME all pal and rgb srcFormats could do this conversion as well // FIXME all scalers more complex than bilinear could do half of this transform static void chrRangeToJpeg_c(int16_t *dstU, int16_t *dstV, int width) { int i; for (i = 0; i < width; i++) { dstU[i] = (FFMIN(dstU[i], 30775) * 4663 - 9289992) >> 12; // -264 dstV[i] = (FFMIN(dstV[i], 30775) * 4663 - 9289992) >> 12; // -264 } } static void chrRangeFromJpeg_c(int16_t *dstU, int16_t *dstV, int width) { int i; for (i = 0; i < width; i++) { dstU[i] = (dstU[i] * 1799 + 4081085) >> 11; // 1469 dstV[i] = (dstV[i] * 1799 + 4081085) >> 11; // 1469 } } static void lumRangeToJpeg_c(int16_t *dst, int width) { int i; for (i = 0; i < width; i++) dst[i] = (FFMIN(dst[i], 30189) * 19077 - 39057361) >> 14; } static void lumRangeFromJpeg_c(int16_t *dst, int width) { int i; for (i = 0; i < width; i++) dst[i] = (dst[i] * 14071 + 33561947) >> 14; } static void chrRangeToJpeg16_c(int16_t *_dstU, int16_t *_dstV, int width) { int i; int32_t *dstU = (int32_t *) _dstU; int32_t *dstV = (int32_t *) _dstV; for (i = 0; i < width; i++) { dstU[i] = (FFMIN(dstU[i], 30775 << 4) * 4663 - (9289992 << 4)) >> 12; // -264 dstV[i] = (FFMIN(dstV[i], 30775 << 4) * 4663 - (9289992 << 4)) >> 12; // -264 } } static void chrRangeFromJpeg16_c(int16_t *_dstU, int16_t *_dstV, int width) { int i; int32_t *dstU = (int32_t *) _dstU; int32_t *dstV = (int32_t *) _dstV; for (i = 0; i < width; i++) { dstU[i] = (dstU[i] * 1799 + (4081085 << 4)) >> 11; // 1469 dstV[i] = (dstV[i] * 1799 + (4081085 << 4)) >> 11; // 1469 } } static void lumRangeToJpeg16_c(int16_t *_dst, int width) { int i; int32_t *dst = (int32_t *) _dst; for (i = 0; i < width; i++) { dst[i] = ((int)(FFMIN(dst[i], 30189 << 4) * 4769U - (39057361 << 2))) >> 12; } } static void lumRangeFromJpeg16_c(int16_t *_dst, int width) { int i; int32_t *dst = (int32_t *) _dst; for (i = 0; i < width; i++) dst[i] = (dst[i]*(14071/4) + (33561947<<4)/4)>>12; } // *** horizontal scale Y line to temp buffer static av_always_inline void hyscale(SwsContext *c, int16_t *dst, int dstWidth, const uint8_t *src_in[4], int srcW, int xInc, const int16_t *hLumFilter, const int32_t *hLumFilterPos, int hLumFilterSize, uint8_t *formatConvBuffer, uint32_t *pal, int isAlpha) { void (*toYV12)(uint8_t *, const uint8_t *, const uint8_t *, const uint8_t *, int, uint32_t *) = isAlpha ? c->alpToYV12 : c->lumToYV12; void (*convertRange)(int16_t *, int) = isAlpha ? NULL : c->lumConvertRange; const uint8_t *src = src_in[isAlpha ? 3 : 0]; if (toYV12) { toYV12(formatConvBuffer, src, src_in[1], src_in[2], srcW, pal); src = formatConvBuffer; } else if (c->readLumPlanar && !isAlpha) { c->readLumPlanar(formatConvBuffer, src_in, srcW, c->input_rgb2yuv_table); src = formatConvBuffer; } else if (c->readAlpPlanar && isAlpha) { c->readAlpPlanar(formatConvBuffer, src_in, srcW, NULL); src = formatConvBuffer; } if (!c->hyscale_fast) { c->hyScale(c, dst, dstWidth, src, hLumFilter, hLumFilterPos, hLumFilterSize); } else { // fast bilinear upscale / crap downscale c->hyscale_fast(c, dst, dstWidth, src, srcW, xInc); } if (convertRange) convertRange(dst, dstWidth); } static av_always_inline void hcscale(SwsContext *c, int16_t *dst1, int16_t *dst2, int dstWidth, const uint8_t *src_in[4], int srcW, int xInc, const int16_t *hChrFilter, const int32_t *hChrFilterPos, int hChrFilterSize, uint8_t *formatConvBuffer, uint32_t *pal) { const uint8_t *src1 = src_in[1], *src2 = src_in[2]; if (c->chrToYV12) { uint8_t *buf2 = formatConvBuffer + FFALIGN(srcW*2+78, 16); c->chrToYV12(formatConvBuffer, buf2, src_in[0], src1, src2, srcW, pal); src1= formatConvBuffer; src2= buf2; } else if (c->readChrPlanar) { uint8_t *buf2 = formatConvBuffer + FFALIGN(srcW*2+78, 16); c->readChrPlanar(formatConvBuffer, buf2, src_in, srcW, c->input_rgb2yuv_table); src1 = formatConvBuffer; src2 = buf2; } if (!c->hcscale_fast) { c->hcScale(c, dst1, dstWidth, src1, hChrFilter, hChrFilterPos, hChrFilterSize); c->hcScale(c, dst2, dstWidth, src2, hChrFilter, hChrFilterPos, hChrFilterSize); } else { // fast bilinear upscale / crap downscale c->hcscale_fast(c, dst1, dst2, dstWidth, src1, src2, srcW, xInc); } if (c->chrConvertRange) c->chrConvertRange(dst1, dst2, dstWidth); } #define DEBUG_SWSCALE_BUFFERS 0 #define DEBUG_BUFFERS(...) \ if (DEBUG_SWSCALE_BUFFERS) \ av_log(c, AV_LOG_DEBUG, __VA_ARGS__) static int swscale(SwsContext *c, const uint8_t *src[], int srcStride[], int srcSliceY, int srcSliceH, uint8_t *dst[], int dstStride[]) { /* load a few things into local vars to make the code more readable? * and faster */ #ifndef NEW_FILTER const int srcW = c->srcW; #endif const int dstW = c->dstW; const int dstH = c->dstH; #ifndef NEW_FILTER const int chrDstW = c->chrDstW; const int chrSrcW = c->chrSrcW; const int lumXInc = c->lumXInc; const int chrXInc = c->chrXInc; #endif const enum AVPixelFormat dstFormat = c->dstFormat; const int flags = c->flags; int32_t *vLumFilterPos = c->vLumFilterPos; int32_t *vChrFilterPos = c->vChrFilterPos; #ifndef NEW_FILTER int32_t *hLumFilterPos = c->hLumFilterPos; int32_t *hChrFilterPos = c->hChrFilterPos; int16_t *hLumFilter = c->hLumFilter; int16_t *hChrFilter = c->hChrFilter; int32_t *lumMmxFilter = c->lumMmxFilter; int32_t *chrMmxFilter = c->chrMmxFilter; #endif const int vLumFilterSize = c->vLumFilterSize; const int vChrFilterSize = c->vChrFilterSize; #ifndef NEW_FILTER const int hLumFilterSize = c->hLumFilterSize; const int hChrFilterSize = c->hChrFilterSize; int16_t **lumPixBuf = c->lumPixBuf; int16_t **chrUPixBuf = c->chrUPixBuf; int16_t **chrVPixBuf = c->chrVPixBuf; #endif int16_t **alpPixBuf = c->alpPixBuf; const int vLumBufSize = c->vLumBufSize; const int vChrBufSize = c->vChrBufSize; #ifndef NEW_FILTER uint8_t *formatConvBuffer = c->formatConvBuffer; uint32_t *pal = c->pal_yuv; int perform_gamma = c->is_internal_gamma; #endif yuv2planar1_fn yuv2plane1 = c->yuv2plane1; yuv2planarX_fn yuv2planeX = c->yuv2planeX; yuv2interleavedX_fn yuv2nv12cX = c->yuv2nv12cX; yuv2packed1_fn yuv2packed1 = c->yuv2packed1; yuv2packed2_fn yuv2packed2 = c->yuv2packed2; yuv2packedX_fn yuv2packedX = c->yuv2packedX; yuv2anyX_fn yuv2anyX = c->yuv2anyX; const int chrSrcSliceY = srcSliceY >> c->chrSrcVSubSample; const int chrSrcSliceH = FF_CEIL_RSHIFT(srcSliceH, c->chrSrcVSubSample); int should_dither = is9_OR_10BPS(c->srcFormat) || is16BPS(c->srcFormat); int lastDstY; /* vars which will change and which we need to store back in the context */ int dstY = c->dstY; int lumBufIndex = c->lumBufIndex; int chrBufIndex = c->chrBufIndex; int lastInLumBuf = c->lastInLumBuf; int lastInChrBuf = c->lastInChrBuf; #ifdef NEW_FILTER int lumStart = 0; int lumEnd = c->descIndex[0]; int chrStart = lumEnd; int chrEnd = c->descIndex[1]; int vStart = chrEnd; int vEnd = c->numDesc; SwsSlice *src_slice = &c->slice[lumStart]; SwsSlice *hout_slice = &c->slice[c->numSlice-2]; SwsSlice *vout_slice = &c->slice[c->numSlice-1]; SwsFilterDescriptor *desc = c->desc; int hasLumHoles = 1; int hasChrHoles = 1; #endif #ifndef NEW_FILTER if (!usePal(c->srcFormat)) { pal = c->input_rgb2yuv_table; } #endif if (isPacked(c->srcFormat)) { src[0] = src[1] = src[2] = src[3] = src[0]; srcStride[0] = srcStride[1] = srcStride[2] = srcStride[3] = srcStride[0]; } srcStride[1] <<= c->vChrDrop; srcStride[2] <<= c->vChrDrop; DEBUG_BUFFERS("swscale() %p[%d] %p[%d] %p[%d] %p[%d] -> %p[%d] %p[%d] %p[%d] %p[%d]\n", src[0], srcStride[0], src[1], srcStride[1], src[2], srcStride[2], src[3], srcStride[3], dst[0], dstStride[0], dst[1], dstStride[1], dst[2], dstStride[2], dst[3], dstStride[3]); DEBUG_BUFFERS("srcSliceY: %d srcSliceH: %d dstY: %d dstH: %d\n", srcSliceY, srcSliceH, dstY, dstH); DEBUG_BUFFERS("vLumFilterSize: %d vLumBufSize: %d vChrFilterSize: %d vChrBufSize: %d\n", vLumFilterSize, vLumBufSize, vChrFilterSize, vChrBufSize); if (dstStride[0]&15 || dstStride[1]&15 || dstStride[2]&15 || dstStride[3]&15) { static int warnedAlready = 0; // FIXME maybe move this into the context if (flags & SWS_PRINT_INFO && !warnedAlready) { av_log(c, AV_LOG_WARNING, "Warning: dstStride is not aligned!\n" " ->cannot do aligned memory accesses anymore\n"); warnedAlready = 1; } } if ( (uintptr_t)dst[0]&15 || (uintptr_t)dst[1]&15 || (uintptr_t)dst[2]&15 || (uintptr_t)src[0]&15 || (uintptr_t)src[1]&15 || (uintptr_t)src[2]&15 || dstStride[0]&15 || dstStride[1]&15 || dstStride[2]&15 || dstStride[3]&15 || srcStride[0]&15 || srcStride[1]&15 || srcStride[2]&15 || srcStride[3]&15 ) { static int warnedAlready=0; int cpu_flags = av_get_cpu_flags(); if (HAVE_MMXEXT && (cpu_flags & AV_CPU_FLAG_SSE2) && !warnedAlready){ av_log(c, AV_LOG_WARNING, "Warning: data is not aligned! This can lead to a speedloss\n"); warnedAlready=1; } } /* Note the user might start scaling the picture in the middle so this * will not get executed. This is not really intended but works * currently, so people might do it. */ if (srcSliceY == 0) { lumBufIndex = -1; chrBufIndex = -1; dstY = 0; lastInLumBuf = -1; lastInChrBuf = -1; } if (!should_dither) { c->chrDither8 = c->lumDither8 = sws_pb_64; } lastDstY = dstY; #ifdef NEW_FILTER ff_init_vscale_pfn(c, yuv2plane1, yuv2planeX, yuv2nv12cX, yuv2packed1, yuv2packed2, yuv2packedX, yuv2anyX, c->use_mmx_vfilter); ff_init_slice_from_src(src_slice, (uint8_t**)src, srcStride, c->srcW, srcSliceY, srcSliceH, chrSrcSliceY, chrSrcSliceH); ff_init_slice_from_src(vout_slice, (uint8_t**)dst, dstStride, c->dstW, dstY, dstH, dstY >> c->chrDstVSubSample, FF_CEIL_RSHIFT(dstH, c->chrDstVSubSample)); hout_slice->plane[0].sliceY = lastInLumBuf + 1; hout_slice->plane[1].sliceY = lastInChrBuf + 1; hout_slice->plane[2].sliceY = lastInChrBuf + 1; hout_slice->plane[3].sliceY = lastInLumBuf + 1; hout_slice->plane[0].sliceH = hout_slice->plane[1].sliceH = hout_slice->plane[2].sliceH = hout_slice->plane[3].sliceH = 0; hout_slice->width = dstW; #endif for (; dstY < dstH; dstY++) { const int chrDstY = dstY >> c->chrDstVSubSample; #ifndef NEW_FILTER uint8_t *dest[4] = { dst[0] + dstStride[0] * dstY, dst[1] + dstStride[1] * chrDstY, dst[2] + dstStride[2] * chrDstY, (CONFIG_SWSCALE_ALPHA && alpPixBuf) ? dst[3] + dstStride[3] * dstY : NULL, }; #endif int use_mmx_vfilter= c->use_mmx_vfilter; // First line needed as input const int firstLumSrcY = FFMAX(1 - vLumFilterSize, vLumFilterPos[dstY]); const int firstLumSrcY2 = FFMAX(1 - vLumFilterSize, vLumFilterPos[FFMIN(dstY | ((1 << c->chrDstVSubSample) - 1), dstH - 1)]); // First line needed as input const int firstChrSrcY = FFMAX(1 - vChrFilterSize, vChrFilterPos[chrDstY]); // Last line needed as input int lastLumSrcY = FFMIN(c->srcH, firstLumSrcY + vLumFilterSize) - 1; int lastLumSrcY2 = FFMIN(c->srcH, firstLumSrcY2 + vLumFilterSize) - 1; int lastChrSrcY = FFMIN(c->chrSrcH, firstChrSrcY + vChrFilterSize) - 1; int enough_lines; #ifdef NEW_FILTER int i; int posY, cPosY, firstPosY, lastPosY, firstCPosY, lastCPosY; #endif // handle holes (FAST_BILINEAR & weird filters) if (firstLumSrcY > lastInLumBuf) { #ifdef NEW_FILTER hasLumHoles = lastInLumBuf != firstLumSrcY - 1; if (hasLumHoles) { hout_slice->plane[0].sliceY = lastInLumBuf + 1; hout_slice->plane[3].sliceY = lastInLumBuf + 1; hout_slice->plane[0].sliceH = hout_slice->plane[3].sliceH = 0; } #endif lastInLumBuf = firstLumSrcY - 1; } if (firstChrSrcY > lastInChrBuf) { #ifdef NEW_FILTER hasChrHoles = lastInChrBuf != firstChrSrcY - 1; if (hasChrHoles) { hout_slice->plane[1].sliceY = lastInChrBuf + 1; hout_slice->plane[2].sliceY = lastInChrBuf + 1; hout_slice->plane[1].sliceH = hout_slice->plane[2].sliceH = 0; } #endif lastInChrBuf = firstChrSrcY - 1; } av_assert0(firstLumSrcY >= lastInLumBuf - vLumBufSize + 1); av_assert0(firstChrSrcY >= lastInChrBuf - vChrBufSize + 1); DEBUG_BUFFERS("dstY: %d\n", dstY); DEBUG_BUFFERS("\tfirstLumSrcY: %d lastLumSrcY: %d lastInLumBuf: %d\n", firstLumSrcY, lastLumSrcY, lastInLumBuf); DEBUG_BUFFERS("\tfirstChrSrcY: %d lastChrSrcY: %d lastInChrBuf: %d\n", firstChrSrcY, lastChrSrcY, lastInChrBuf); // Do we have enough lines in this slice to output the dstY line enough_lines = lastLumSrcY2 < srcSliceY + srcSliceH && lastChrSrcY < FF_CEIL_RSHIFT(srcSliceY + srcSliceH, c->chrSrcVSubSample); if (!enough_lines) { lastLumSrcY = srcSliceY + srcSliceH - 1; lastChrSrcY = chrSrcSliceY + chrSrcSliceH - 1; DEBUG_BUFFERS("buffering slice: lastLumSrcY %d lastChrSrcY %d\n", lastLumSrcY, lastChrSrcY); } #ifdef NEW_FILTER posY = hout_slice->plane[0].sliceY + hout_slice->plane[0].sliceH; if (posY <= lastLumSrcY && !hasLumHoles) { firstPosY = FFMAX(firstLumSrcY, posY); lastPosY = FFMIN(lastLumSrcY + MAX_LINES_AHEAD, srcSliceY + srcSliceH - 1); } else { firstPosY = lastInLumBuf + 1; lastPosY = lastLumSrcY; } cPosY = hout_slice->plane[1].sliceY + hout_slice->plane[1].sliceH; if (cPosY <= lastChrSrcY && !hasChrHoles) { firstCPosY = FFMAX(firstChrSrcY, cPosY); lastCPosY = FFMIN(lastChrSrcY + MAX_LINES_AHEAD, FF_CEIL_RSHIFT(srcSliceY + srcSliceH, c->chrSrcVSubSample) - 1); } else { firstCPosY = lastInChrBuf + 1; lastCPosY = lastChrSrcY; } ff_rotate_slice(hout_slice, lastPosY, lastCPosY); if (posY < lastLumSrcY + 1) { for (i = lumStart; i < lumEnd; ++i) desc[i].process(c, &desc[i], firstPosY, lastPosY - firstPosY + 1); } lumBufIndex += lastLumSrcY - lastInLumBuf; lastInLumBuf = lastLumSrcY; if (cPosY < lastChrSrcY + 1) { for (i = chrStart; i < chrEnd; ++i) desc[i].process(c, &desc[i], firstCPosY, lastCPosY - firstCPosY + 1); } chrBufIndex += lastChrSrcY - lastInChrBuf; lastInChrBuf = lastChrSrcY; #else // Do horizontal scaling while (lastInLumBuf < lastLumSrcY) { const uint8_t *src1[4] = { src[0] + (lastInLumBuf + 1 - srcSliceY) * srcStride[0], src[1] + (lastInLumBuf + 1 - srcSliceY) * srcStride[1], src[2] + (lastInLumBuf + 1 - srcSliceY) * srcStride[2], src[3] + (lastInLumBuf + 1 - srcSliceY) * srcStride[3], }; lumBufIndex++; av_assert0(lumBufIndex < 2 * vLumBufSize); av_assert0(lastInLumBuf + 1 - srcSliceY < srcSliceH); av_assert0(lastInLumBuf + 1 - srcSliceY >= 0); if (perform_gamma) gamma_convert((uint8_t **)src1, srcW, c->inv_gamma); hyscale(c, lumPixBuf[lumBufIndex], dstW, src1, srcW, lumXInc, hLumFilter, hLumFilterPos, hLumFilterSize, formatConvBuffer, pal, 0); if (CONFIG_SWSCALE_ALPHA && alpPixBuf) hyscale(c, alpPixBuf[lumBufIndex], dstW, src1, srcW, lumXInc, hLumFilter, hLumFilterPos, hLumFilterSize, formatConvBuffer, pal, 1); lastInLumBuf++; DEBUG_BUFFERS("\t\tlumBufIndex %d: lastInLumBuf: %d\n", lumBufIndex, lastInLumBuf); } while (lastInChrBuf < lastChrSrcY) { const uint8_t *src1[4] = { src[0] + (lastInChrBuf + 1 - chrSrcSliceY) * srcStride[0], src[1] + (lastInChrBuf + 1 - chrSrcSliceY) * srcStride[1], src[2] + (lastInChrBuf + 1 - chrSrcSliceY) * srcStride[2], src[3] + (lastInChrBuf + 1 - chrSrcSliceY) * srcStride[3], }; chrBufIndex++; av_assert0(chrBufIndex < 2 * vChrBufSize); av_assert0(lastInChrBuf + 1 - chrSrcSliceY < (chrSrcSliceH)); av_assert0(lastInChrBuf + 1 - chrSrcSliceY >= 0); // FIXME replace parameters through context struct (some at least) if (c->needs_hcscale) hcscale(c, chrUPixBuf[chrBufIndex], chrVPixBuf[chrBufIndex], chrDstW, src1, chrSrcW, chrXInc, hChrFilter, hChrFilterPos, hChrFilterSize, formatConvBuffer, pal); lastInChrBuf++; DEBUG_BUFFERS("\t\tchrBufIndex %d: lastInChrBuf: %d\n", chrBufIndex, lastInChrBuf); } #endif // wrap buf index around to stay inside the ring buffer if (lumBufIndex >= vLumBufSize) lumBufIndex -= vLumBufSize; if (chrBufIndex >= vChrBufSize) chrBufIndex -= vChrBufSize; if (!enough_lines) break; // we can't output a dstY line so let's try with the next slice #if HAVE_MMX_INLINE ff_updateMMXDitherTables(c, dstY, lumBufIndex, chrBufIndex, lastInLumBuf, lastInChrBuf); #endif if (should_dither) { c->chrDither8 = ff_dither_8x8_128[chrDstY & 7]; c->lumDither8 = ff_dither_8x8_128[dstY & 7]; } if (dstY >= dstH - 2) { /* hmm looks like we can't use MMX here without overwriting * this array's tail */ ff_sws_init_output_funcs(c, &yuv2plane1, &yuv2planeX, &yuv2nv12cX, &yuv2packed1, &yuv2packed2, &yuv2packedX, &yuv2anyX); use_mmx_vfilter= 0; ff_init_vscale_pfn(c, yuv2plane1, yuv2planeX, yuv2nv12cX, yuv2packed1, yuv2packed2, yuv2packedX, yuv2anyX, use_mmx_vfilter); } { #ifdef NEW_FILTER for (i = vStart; i < vEnd; ++i) desc[i].process(c, &desc[i], dstY, 1); #else const int16_t **lumSrcPtr = (const int16_t **)(void*) lumPixBuf + lumBufIndex + firstLumSrcY - lastInLumBuf + vLumBufSize; const int16_t **chrUSrcPtr = (const int16_t **)(void*) chrUPixBuf + chrBufIndex + firstChrSrcY - lastInChrBuf + vChrBufSize; const int16_t **chrVSrcPtr = (const int16_t **)(void*) chrVPixBuf + chrBufIndex + firstChrSrcY - lastInChrBuf + vChrBufSize; const int16_t **alpSrcPtr = (CONFIG_SWSCALE_ALPHA && alpPixBuf) ? (const int16_t **)(void*) alpPixBuf + lumBufIndex + firstLumSrcY - lastInLumBuf + vLumBufSize : NULL; int16_t *vLumFilter = c->vLumFilter; int16_t *vChrFilter = c->vChrFilter; if (isPlanarYUV(dstFormat) || (isGray(dstFormat) && !isALPHA(dstFormat))) { // YV12 like const int chrSkipMask = (1 << c->chrDstVSubSample) - 1; vLumFilter += dstY * vLumFilterSize; vChrFilter += chrDstY * vChrFilterSize; // av_assert0(use_mmx_vfilter != ( // yuv2planeX == yuv2planeX_10BE_c // || yuv2planeX == yuv2planeX_10LE_c // || yuv2planeX == yuv2planeX_9BE_c // || yuv2planeX == yuv2planeX_9LE_c // || yuv2planeX == yuv2planeX_16BE_c // || yuv2planeX == yuv2planeX_16LE_c // || yuv2planeX == yuv2planeX_8_c) || !ARCH_X86); if(use_mmx_vfilter){ vLumFilter= (int16_t *)c->lumMmxFilter; vChrFilter= (int16_t *)c->chrMmxFilter; } if (vLumFilterSize == 1) { yuv2plane1(lumSrcPtr[0], dest[0], dstW, c->lumDither8, 0); } else { yuv2planeX(vLumFilter, vLumFilterSize, lumSrcPtr, dest[0], dstW, c->lumDither8, 0); } if (!((dstY & chrSkipMask) || isGray(dstFormat))) { if (yuv2nv12cX) { yuv2nv12cX(c, vChrFilter, vChrFilterSize, chrUSrcPtr, chrVSrcPtr, dest[1], chrDstW); } else if (vChrFilterSize == 1) { yuv2plane1(chrUSrcPtr[0], dest[1], chrDstW, c->chrDither8, 0); yuv2plane1(chrVSrcPtr[0], dest[2], chrDstW, c->chrDither8, 3); } else { yuv2planeX(vChrFilter, vChrFilterSize, chrUSrcPtr, dest[1], chrDstW, c->chrDither8, 0); yuv2planeX(vChrFilter, vChrFilterSize, chrVSrcPtr, dest[2], chrDstW, c->chrDither8, use_mmx_vfilter ? (c->uv_offx2 >> 1) : 3); } } if (CONFIG_SWSCALE_ALPHA && alpPixBuf) { if(use_mmx_vfilter){ vLumFilter= (int16_t *)c->alpMmxFilter; } if (vLumFilterSize == 1) { yuv2plane1(alpSrcPtr[0], dest[3], dstW, c->lumDither8, 0); } else { yuv2planeX(vLumFilter, vLumFilterSize, alpSrcPtr, dest[3], dstW, c->lumDither8, 0); } } } else if (yuv2packedX) { av_assert1(lumSrcPtr + vLumFilterSize - 1 < (const int16_t **)lumPixBuf + vLumBufSize * 2); av_assert1(chrUSrcPtr + vChrFilterSize - 1 < (const int16_t **)chrUPixBuf + vChrBufSize * 2); if (c->yuv2packed1 && vLumFilterSize == 1 && vChrFilterSize <= 2) { // unscaled RGB int chrAlpha = vChrFilterSize == 1 ? 0 : vChrFilter[2 * dstY + 1]; yuv2packed1(c, *lumSrcPtr, chrUSrcPtr, chrVSrcPtr, alpPixBuf ? *alpSrcPtr : NULL, dest[0], dstW, chrAlpha, dstY); } else if (c->yuv2packed2 && vLumFilterSize == 2 && vChrFilterSize == 2) { // bilinear upscale RGB int lumAlpha = vLumFilter[2 * dstY + 1]; int chrAlpha = vChrFilter[2 * dstY + 1]; lumMmxFilter[2] = lumMmxFilter[3] = vLumFilter[2 * dstY] * 0x10001; chrMmxFilter[2] = chrMmxFilter[3] = vChrFilter[2 * chrDstY] * 0x10001; yuv2packed2(c, lumSrcPtr, chrUSrcPtr, chrVSrcPtr, alpPixBuf ? alpSrcPtr : NULL, dest[0], dstW, lumAlpha, chrAlpha, dstY); } else { // general RGB yuv2packedX(c, vLumFilter + dstY * vLumFilterSize, lumSrcPtr, vLumFilterSize, vChrFilter + dstY * vChrFilterSize, chrUSrcPtr, chrVSrcPtr, vChrFilterSize, alpSrcPtr, dest[0], dstW, dstY); } } else { av_assert1(!yuv2packed1 && !yuv2packed2); yuv2anyX(c, vLumFilter + dstY * vLumFilterSize, lumSrcPtr, vLumFilterSize, vChrFilter + dstY * vChrFilterSize, chrUSrcPtr, chrVSrcPtr, vChrFilterSize, alpSrcPtr, dest, dstW, dstY); } if (perform_gamma) gamma_convert(dest, dstW, c->gamma); #endif } } if (isPlanar(dstFormat) && isALPHA(dstFormat) && !alpPixBuf) { int length = dstW; int height = dstY - lastDstY; if (is16BPS(dstFormat) || isNBPS(dstFormat)) { const AVPixFmtDescriptor *desc = av_pix_fmt_desc_get(dstFormat); fillPlane16(dst[3], dstStride[3], length, height, lastDstY, 1, desc->comp[3].depth, isBE(dstFormat)); } else fillPlane(dst[3], dstStride[3], length, height, lastDstY, 255); } #if HAVE_MMXEXT_INLINE if (av_get_cpu_flags() & AV_CPU_FLAG_MMXEXT) __asm__ volatile ("sfence" ::: "memory"); #endif emms_c(); /* store changed local vars back in the context */ c->dstY = dstY; c->lumBufIndex = lumBufIndex; c->chrBufIndex = chrBufIndex; c->lastInLumBuf = lastInLumBuf; c->lastInChrBuf = lastInChrBuf; return dstY - lastDstY; } av_cold void ff_sws_init_range_convert(SwsContext *c) { c->lumConvertRange = NULL; c->chrConvertRange = NULL; if (c->srcRange != c->dstRange && !isAnyRGB(c->dstFormat)) { if (c->dstBpc <= 14) { if (c->srcRange) { c->lumConvertRange = lumRangeFromJpeg_c; c->chrConvertRange = chrRangeFromJpeg_c; } else { c->lumConvertRange = lumRangeToJpeg_c; c->chrConvertRange = chrRangeToJpeg_c; } } else { if (c->srcRange) { c->lumConvertRange = lumRangeFromJpeg16_c; c->chrConvertRange = chrRangeFromJpeg16_c; } else { c->lumConvertRange = lumRangeToJpeg16_c; c->chrConvertRange = chrRangeToJpeg16_c; } } } } static av_cold void sws_init_swscale(SwsContext *c) { enum AVPixelFormat srcFormat = c->srcFormat; ff_sws_init_output_funcs(c, &c->yuv2plane1, &c->yuv2planeX, &c->yuv2nv12cX, &c->yuv2packed1, &c->yuv2packed2, &c->yuv2packedX, &c->yuv2anyX); ff_sws_init_input_funcs(c); if (c->srcBpc == 8) { if (c->dstBpc <= 14) { c->hyScale = c->hcScale = hScale8To15_c; if (c->flags & SWS_FAST_BILINEAR) { c->hyscale_fast = ff_hyscale_fast_c; c->hcscale_fast = ff_hcscale_fast_c; } } else { c->hyScale = c->hcScale = hScale8To19_c; } } else { c->hyScale = c->hcScale = c->dstBpc > 14 ? hScale16To19_c : hScale16To15_c; } ff_sws_init_range_convert(c); if (!(isGray(srcFormat) || isGray(c->dstFormat) || srcFormat == AV_PIX_FMT_MONOBLACK || srcFormat == AV_PIX_FMT_MONOWHITE)) c->needs_hcscale = 1; } SwsFunc ff_getSwsFunc(SwsContext *c) { sws_init_swscale(c); if (ARCH_PPC) ff_sws_init_swscale_ppc(c); if (ARCH_X86) ff_sws_init_swscale_x86(c); return swscale; } static void reset_ptr(const uint8_t *src[], enum AVPixelFormat format) { if (!isALPHA(format)) src[3] = NULL; if (!isPlanar(format)) { src[3] = src[2] = NULL; if (!usePal(format)) src[1] = NULL; } } static int check_image_pointers(const uint8_t * const data[4], enum AVPixelFormat pix_fmt, const int linesizes[4]) { const AVPixFmtDescriptor *desc = av_pix_fmt_desc_get(pix_fmt); int i; av_assert2(desc); for (i = 0; i < 4; i++) { int plane = desc->comp[i].plane; if (!data[plane] || !linesizes[plane]) return 0; } return 1; } static void xyz12Torgb48(struct SwsContext *c, uint16_t *dst, const uint16_t *src, int stride, int h) { int xp,yp; const AVPixFmtDescriptor *desc = av_pix_fmt_desc_get(c->srcFormat); for (yp=0; ypflags & AV_PIX_FMT_FLAG_BE) { x = AV_RB16(src + xp + 0); y = AV_RB16(src + xp + 1); z = AV_RB16(src + xp + 2); } else { x = AV_RL16(src + xp + 0); y = AV_RL16(src + xp + 1); z = AV_RL16(src + xp + 2); } x = c->xyzgamma[x>>4]; y = c->xyzgamma[y>>4]; z = c->xyzgamma[z>>4]; // convert from XYZlinear to sRGBlinear r = c->xyz2rgb_matrix[0][0] * x + c->xyz2rgb_matrix[0][1] * y + c->xyz2rgb_matrix[0][2] * z >> 12; g = c->xyz2rgb_matrix[1][0] * x + c->xyz2rgb_matrix[1][1] * y + c->xyz2rgb_matrix[1][2] * z >> 12; b = c->xyz2rgb_matrix[2][0] * x + c->xyz2rgb_matrix[2][1] * y + c->xyz2rgb_matrix[2][2] * z >> 12; // limit values to 12-bit depth r = av_clip_uintp2(r, 12); g = av_clip_uintp2(g, 12); b = av_clip_uintp2(b, 12); // convert from sRGBlinear to RGB and scale from 12bit to 16bit if (desc->flags & AV_PIX_FMT_FLAG_BE) { AV_WB16(dst + xp + 0, c->rgbgamma[r] << 4); AV_WB16(dst + xp + 1, c->rgbgamma[g] << 4); AV_WB16(dst + xp + 2, c->rgbgamma[b] << 4); } else { AV_WL16(dst + xp + 0, c->rgbgamma[r] << 4); AV_WL16(dst + xp + 1, c->rgbgamma[g] << 4); AV_WL16(dst + xp + 2, c->rgbgamma[b] << 4); } } src += stride; dst += stride; } } static void rgb48Toxyz12(struct SwsContext *c, uint16_t *dst, const uint16_t *src, int stride, int h) { int xp,yp; const AVPixFmtDescriptor *desc = av_pix_fmt_desc_get(c->dstFormat); for (yp=0; ypflags & AV_PIX_FMT_FLAG_BE) { r = AV_RB16(src + xp + 0); g = AV_RB16(src + xp + 1); b = AV_RB16(src + xp + 2); } else { r = AV_RL16(src + xp + 0); g = AV_RL16(src + xp + 1); b = AV_RL16(src + xp + 2); } r = c->rgbgammainv[r>>4]; g = c->rgbgammainv[g>>4]; b = c->rgbgammainv[b>>4]; // convert from sRGBlinear to XYZlinear x = c->rgb2xyz_matrix[0][0] * r + c->rgb2xyz_matrix[0][1] * g + c->rgb2xyz_matrix[0][2] * b >> 12; y = c->rgb2xyz_matrix[1][0] * r + c->rgb2xyz_matrix[1][1] * g + c->rgb2xyz_matrix[1][2] * b >> 12; z = c->rgb2xyz_matrix[2][0] * r + c->rgb2xyz_matrix[2][1] * g + c->rgb2xyz_matrix[2][2] * b >> 12; // limit values to 12-bit depth x = av_clip_uintp2(x, 12); y = av_clip_uintp2(y, 12); z = av_clip_uintp2(z, 12); // convert from XYZlinear to X'Y'Z' and scale from 12bit to 16bit if (desc->flags & AV_PIX_FMT_FLAG_BE) { AV_WB16(dst + xp + 0, c->xyzgammainv[x] << 4); AV_WB16(dst + xp + 1, c->xyzgammainv[y] << 4); AV_WB16(dst + xp + 2, c->xyzgammainv[z] << 4); } else { AV_WL16(dst + xp + 0, c->xyzgammainv[x] << 4); AV_WL16(dst + xp + 1, c->xyzgammainv[y] << 4); AV_WL16(dst + xp + 2, c->xyzgammainv[z] << 4); } } src += stride; dst += stride; } } /** * swscale wrapper, so we don't need to export the SwsContext. * Assumes planar YUV to be in YUV order instead of YVU. */ int attribute_align_arg sws_scale(struct SwsContext *c, const uint8_t * const srcSlice[], const int srcStride[], int srcSliceY, int srcSliceH, uint8_t *const dst[], const int dstStride[]) { int i, ret; const uint8_t *src2[4]; uint8_t *dst2[4]; uint8_t *rgb0_tmp = NULL; if (!srcStride || !dstStride || !dst || !srcSlice) { av_log(c, AV_LOG_ERROR, "One of the input parameters to sws_scale() is NULL, please check the calling code\n"); return 0; } if (c->gamma_flag && c->cascaded_context[0]) { ret = sws_scale(c->cascaded_context[0], srcSlice, srcStride, srcSliceY, srcSliceH, c->cascaded_tmp, c->cascaded_tmpStride); if (ret < 0) return ret; if (c->cascaded_context[2]) ret = sws_scale(c->cascaded_context[1], (const uint8_t * const *)c->cascaded_tmp, c->cascaded_tmpStride, srcSliceY, srcSliceH, c->cascaded1_tmp, c->cascaded1_tmpStride); else ret = sws_scale(c->cascaded_context[1], (const uint8_t * const *)c->cascaded_tmp, c->cascaded_tmpStride, srcSliceY, srcSliceH, dst, dstStride); if (ret < 0) return ret; if (c->cascaded_context[2]) { ret = sws_scale(c->cascaded_context[2], (const uint8_t * const *)c->cascaded1_tmp, c->cascaded1_tmpStride, c->cascaded_context[1]->dstY - ret, c->cascaded_context[1]->dstY, dst, dstStride); } return ret; } if (c->cascaded_context[0] && srcSliceY == 0 && srcSliceH == c->cascaded_context[0]->srcH) { ret = sws_scale(c->cascaded_context[0], srcSlice, srcStride, srcSliceY, srcSliceH, c->cascaded_tmp, c->cascaded_tmpStride); if (ret < 0) return ret; ret = sws_scale(c->cascaded_context[1], (const uint8_t * const * )c->cascaded_tmp, c->cascaded_tmpStride, 0, c->cascaded_context[0]->dstH, dst, dstStride); return ret; } memcpy(src2, srcSlice, sizeof(src2)); memcpy(dst2, dst, sizeof(dst2)); // do not mess up sliceDir if we have a "trailing" 0-size slice if (srcSliceH == 0) return 0; if (!check_image_pointers(srcSlice, c->srcFormat, srcStride)) { av_log(c, AV_LOG_ERROR, "bad src image pointers\n"); return 0; } if (!check_image_pointers((const uint8_t* const*)dst, c->dstFormat, dstStride)) { av_log(c, AV_LOG_ERROR, "bad dst image pointers\n"); return 0; } if (c->sliceDir == 0 && srcSliceY != 0 && srcSliceY + srcSliceH != c->srcH) { av_log(c, AV_LOG_ERROR, "Slices start in the middle!\n"); return 0; } if (c->sliceDir == 0) { if (srcSliceY == 0) c->sliceDir = 1; else c->sliceDir = -1; } if (usePal(c->srcFormat)) { for (i = 0; i < 256; i++) { int r, g, b, y, u, v, a = 0xff; if (c->srcFormat == AV_PIX_FMT_PAL8) { uint32_t p = ((const uint32_t *)(srcSlice[1]))[i]; a = (p >> 24) & 0xFF; r = (p >> 16) & 0xFF; g = (p >> 8) & 0xFF; b = p & 0xFF; } else if (c->srcFormat == AV_PIX_FMT_RGB8) { r = ( i >> 5 ) * 36; g = ((i >> 2) & 7) * 36; b = ( i & 3) * 85; } else if (c->srcFormat == AV_PIX_FMT_BGR8) { b = ( i >> 6 ) * 85; g = ((i >> 3) & 7) * 36; r = ( i & 7) * 36; } else if (c->srcFormat == AV_PIX_FMT_RGB4_BYTE) { r = ( i >> 3 ) * 255; g = ((i >> 1) & 3) * 85; b = ( i & 1) * 255; } else if (c->srcFormat == AV_PIX_FMT_GRAY8 || c->srcFormat == AV_PIX_FMT_GRAY8A) { r = g = b = i; } else { av_assert1(c->srcFormat == AV_PIX_FMT_BGR4_BYTE); b = ( i >> 3 ) * 255; g = ((i >> 1) & 3) * 85; r = ( i & 1) * 255; } #define RGB2YUV_SHIFT 15 #define BY ( (int) (0.114 * 219 / 255 * (1 << RGB2YUV_SHIFT) + 0.5)) #define BV (-(int) (0.081 * 224 / 255 * (1 << RGB2YUV_SHIFT) + 0.5)) #define BU ( (int) (0.500 * 224 / 255 * (1 << RGB2YUV_SHIFT) + 0.5)) #define GY ( (int) (0.587 * 219 / 255 * (1 << RGB2YUV_SHIFT) + 0.5)) #define GV (-(int) (0.419 * 224 / 255 * (1 << RGB2YUV_SHIFT) + 0.5)) #define GU (-(int) (0.331 * 224 / 255 * (1 << RGB2YUV_SHIFT) + 0.5)) #define RY ( (int) (0.299 * 219 / 255 * (1 << RGB2YUV_SHIFT) + 0.5)) #define RV ( (int) (0.500 * 224 / 255 * (1 << RGB2YUV_SHIFT) + 0.5)) #define RU (-(int) (0.169 * 224 / 255 * (1 << RGB2YUV_SHIFT) + 0.5)) y = av_clip_uint8((RY * r + GY * g + BY * b + ( 33 << (RGB2YUV_SHIFT - 1))) >> RGB2YUV_SHIFT); u = av_clip_uint8((RU * r + GU * g + BU * b + (257 << (RGB2YUV_SHIFT - 1))) >> RGB2YUV_SHIFT); v = av_clip_uint8((RV * r + GV * g + BV * b + (257 << (RGB2YUV_SHIFT - 1))) >> RGB2YUV_SHIFT); c->pal_yuv[i]= y + (u<<8) + (v<<16) + ((unsigned)a<<24); switch (c->dstFormat) { case AV_PIX_FMT_BGR32: #if !HAVE_BIGENDIAN case AV_PIX_FMT_RGB24: #endif c->pal_rgb[i]= r + (g<<8) + (b<<16) + ((unsigned)a<<24); break; case AV_PIX_FMT_BGR32_1: #if HAVE_BIGENDIAN case AV_PIX_FMT_BGR24: #endif c->pal_rgb[i]= a + (r<<8) + (g<<16) + ((unsigned)b<<24); break; case AV_PIX_FMT_RGB32_1: #if HAVE_BIGENDIAN case AV_PIX_FMT_RGB24: #endif c->pal_rgb[i]= a + (b<<8) + (g<<16) + ((unsigned)r<<24); break; case AV_PIX_FMT_RGB32: #if !HAVE_BIGENDIAN case AV_PIX_FMT_BGR24: #endif default: c->pal_rgb[i]= b + (g<<8) + (r<<16) + ((unsigned)a<<24); } } } if (c->src0Alpha && !c->dst0Alpha && isALPHA(c->dstFormat)) { uint8_t *base; int x,y; rgb0_tmp = av_malloc(FFABS(srcStride[0]) * srcSliceH + 32); if (!rgb0_tmp) return AVERROR(ENOMEM); base = srcStride[0] < 0 ? rgb0_tmp - srcStride[0] * (srcSliceH-1) : rgb0_tmp; for (y=0; ysrcW); for (x=c->src0Alpha-1; x<4*c->srcW; x+=4) { base[ srcStride[0]*y + x] = 0xFF; } } src2[0] = base; } if (c->srcXYZ && !(c->dstXYZ && c->srcW==c->dstW && c->srcH==c->dstH)) { uint8_t *base; rgb0_tmp = av_malloc(FFABS(srcStride[0]) * srcSliceH + 32); if (!rgb0_tmp) return AVERROR(ENOMEM); base = srcStride[0] < 0 ? rgb0_tmp - srcStride[0] * (srcSliceH-1) : rgb0_tmp; xyz12Torgb48(c, (uint16_t*)base, (const uint16_t*)src2[0], srcStride[0]/2, srcSliceH); src2[0] = base; } if (!srcSliceY && (c->flags & SWS_BITEXACT) && c->dither == SWS_DITHER_ED && c->dither_error[0]) for (i = 0; i < 4; i++) memset(c->dither_error[i], 0, sizeof(c->dither_error[0][0]) * (c->dstW+2)); // copy strides, so they can safely be modified if (c->sliceDir == 1) { // slices go from top to bottom int srcStride2[4] = { srcStride[0], srcStride[1], srcStride[2], srcStride[3] }; int dstStride2[4] = { dstStride[0], dstStride[1], dstStride[2], dstStride[3] }; reset_ptr(src2, c->srcFormat); reset_ptr((void*)dst2, c->dstFormat); /* reset slice direction at end of frame */ if (srcSliceY + srcSliceH == c->srcH) c->sliceDir = 0; ret = c->swscale(c, src2, srcStride2, srcSliceY, srcSliceH, dst2, dstStride2); } else { // slices go from bottom to top => we flip the image internally int srcStride2[4] = { -srcStride[0], -srcStride[1], -srcStride[2], -srcStride[3] }; int dstStride2[4] = { -dstStride[0], -dstStride[1], -dstStride[2], -dstStride[3] }; src2[0] += (srcSliceH - 1) * srcStride[0]; if (!usePal(c->srcFormat)) src2[1] += ((srcSliceH >> c->chrSrcVSubSample) - 1) * srcStride[1]; src2[2] += ((srcSliceH >> c->chrSrcVSubSample) - 1) * srcStride[2]; src2[3] += (srcSliceH - 1) * srcStride[3]; dst2[0] += ( c->dstH - 1) * dstStride[0]; dst2[1] += ((c->dstH >> c->chrDstVSubSample) - 1) * dstStride[1]; dst2[2] += ((c->dstH >> c->chrDstVSubSample) - 1) * dstStride[2]; dst2[3] += ( c->dstH - 1) * dstStride[3]; reset_ptr(src2, c->srcFormat); reset_ptr((void*)dst2, c->dstFormat); /* reset slice direction at end of frame */ if (!srcSliceY) c->sliceDir = 0; ret = c->swscale(c, src2, srcStride2, c->srcH-srcSliceY-srcSliceH, srcSliceH, dst2, dstStride2); } if (c->dstXYZ && !(c->srcXYZ && c->srcW==c->dstW && c->srcH==c->dstH)) { /* replace on the same data */ rgb48Toxyz12(c, (uint16_t*)dst2[0], (const uint16_t*)dst2[0], dstStride[0]/2, ret); } av_free(rgb0_tmp); return ret; }