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Diffstat (limited to 'ffmpeg/libswscale/utils.c')
| -rw-r--r-- | ffmpeg/libswscale/utils.c | 1882 |
1 files changed, 1882 insertions, 0 deletions
diff --git a/ffmpeg/libswscale/utils.c b/ffmpeg/libswscale/utils.c new file mode 100644 index 0000000..932cf94 --- /dev/null +++ b/ffmpeg/libswscale/utils.c @@ -0,0 +1,1882 @@ +/* + * Copyright (C) 2001-2003 Michael Niedermayer <michaelni@gmx.at> + * + * 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 "config.h" + +#define _SVID_SOURCE // needed for MAP_ANONYMOUS +#define _DARWIN_C_SOURCE // needed for MAP_ANON +#include <inttypes.h> +#include <math.h> +#include <stdio.h> +#include <string.h> +#if HAVE_SYS_MMAN_H +#include <sys/mman.h> +#if defined(MAP_ANON) && !defined(MAP_ANONYMOUS) +#define MAP_ANONYMOUS MAP_ANON +#endif +#endif +#if HAVE_VIRTUALALLOC +#define WIN32_LEAN_AND_MEAN +#include <windows.h> +#endif + +#include "libavutil/attributes.h" +#include "libavutil/avassert.h" +#include "libavutil/avutil.h" +#include "libavutil/bswap.h" +#include "libavutil/cpu.h" +#include "libavutil/intreadwrite.h" +#include "libavutil/mathematics.h" +#include "libavutil/opt.h" +#include "libavutil/pixdesc.h" +#include "libavutil/x86/asm.h" +#include "libavutil/x86/cpu.h" +#include "rgb2rgb.h" +#include "swscale.h" +#include "swscale_internal.h" + +unsigned swscale_version(void) +{ + av_assert0(LIBSWSCALE_VERSION_MICRO >= 100); + return LIBSWSCALE_VERSION_INT; +} + +const char *swscale_configuration(void) +{ + return FFMPEG_CONFIGURATION; +} + +const char *swscale_license(void) +{ +#define LICENSE_PREFIX "libswscale license: " + return LICENSE_PREFIX FFMPEG_LICENSE + sizeof(LICENSE_PREFIX) - 1; +} + +#define RET 0xC3 // near return opcode for x86 + +typedef struct FormatEntry { + int is_supported_in, is_supported_out; +} FormatEntry; + +static const FormatEntry format_entries[AV_PIX_FMT_NB] = { + [AV_PIX_FMT_YUV420P] = { 1, 1 }, + [AV_PIX_FMT_YUYV422] = { 1, 1 }, + [AV_PIX_FMT_RGB24] = { 1, 1 }, + [AV_PIX_FMT_BGR24] = { 1, 1 }, + [AV_PIX_FMT_YUV422P] = { 1, 1 }, + [AV_PIX_FMT_YUV444P] = { 1, 1 }, + [AV_PIX_FMT_YUV410P] = { 1, 1 }, + [AV_PIX_FMT_YUV411P] = { 1, 1 }, + [AV_PIX_FMT_GRAY8] = { 1, 1 }, + [AV_PIX_FMT_MONOWHITE] = { 1, 1 }, + [AV_PIX_FMT_MONOBLACK] = { 1, 1 }, + [AV_PIX_FMT_PAL8] = { 1, 0 }, + [AV_PIX_FMT_YUVJ420P] = { 1, 1 }, + [AV_PIX_FMT_YUVJ422P] = { 1, 1 }, + [AV_PIX_FMT_YUVJ444P] = { 1, 1 }, + [AV_PIX_FMT_UYVY422] = { 1, 1 }, + [AV_PIX_FMT_UYYVYY411] = { 0, 0 }, + [AV_PIX_FMT_BGR8] = { 1, 1 }, + [AV_PIX_FMT_BGR4] = { 0, 1 }, + [AV_PIX_FMT_BGR4_BYTE] = { 1, 1 }, + [AV_PIX_FMT_RGB8] = { 1, 1 }, + [AV_PIX_FMT_RGB4] = { 0, 1 }, + [AV_PIX_FMT_RGB4_BYTE] = { 1, 1 }, + [AV_PIX_FMT_NV12] = { 1, 1 }, + [AV_PIX_FMT_NV21] = { 1, 1 }, + [AV_PIX_FMT_ARGB] = { 1, 1 }, + [AV_PIX_FMT_RGBA] = { 1, 1 }, + [AV_PIX_FMT_ABGR] = { 1, 1 }, + [AV_PIX_FMT_BGRA] = { 1, 1 }, + [AV_PIX_FMT_0RGB] = { 1, 1 }, + [AV_PIX_FMT_RGB0] = { 1, 1 }, + [AV_PIX_FMT_0BGR] = { 1, 1 }, + [AV_PIX_FMT_BGR0] = { 1, 1 }, + [AV_PIX_FMT_GRAY16BE] = { 1, 1 }, + [AV_PIX_FMT_GRAY16LE] = { 1, 1 }, + [AV_PIX_FMT_YUV440P] = { 1, 1 }, + [AV_PIX_FMT_YUVJ440P] = { 1, 1 }, + [AV_PIX_FMT_YUVA420P] = { 1, 1 }, + [AV_PIX_FMT_YUVA422P] = { 1, 1 }, + [AV_PIX_FMT_YUVA444P] = { 1, 1 }, + [AV_PIX_FMT_YUVA420P9BE] = { 1, 1 }, + [AV_PIX_FMT_YUVA420P9LE] = { 1, 1 }, + [AV_PIX_FMT_YUVA422P9BE] = { 1, 1 }, + [AV_PIX_FMT_YUVA422P9LE] = { 1, 1 }, + [AV_PIX_FMT_YUVA444P9BE] = { 1, 1 }, + [AV_PIX_FMT_YUVA444P9LE] = { 1, 1 }, + [AV_PIX_FMT_YUVA420P10BE]= { 1, 1 }, + [AV_PIX_FMT_YUVA420P10LE]= { 1, 1 }, + [AV_PIX_FMT_YUVA422P10BE]= { 1, 1 }, + [AV_PIX_FMT_YUVA422P10LE]= { 1, 1 }, + [AV_PIX_FMT_YUVA444P10BE]= { 1, 1 }, + [AV_PIX_FMT_YUVA444P10LE]= { 1, 1 }, + [AV_PIX_FMT_YUVA420P16BE]= { 1, 1 }, + [AV_PIX_FMT_YUVA420P16LE]= { 1, 1 }, + [AV_PIX_FMT_YUVA422P16BE]= { 1, 1 }, + [AV_PIX_FMT_YUVA422P16LE]= { 1, 1 }, + [AV_PIX_FMT_YUVA444P16BE]= { 1, 1 }, + [AV_PIX_FMT_YUVA444P16LE]= { 1, 1 }, + [AV_PIX_FMT_RGB48BE] = { 1, 1 }, + [AV_PIX_FMT_RGB48LE] = { 1, 1 }, + [AV_PIX_FMT_RGBA64BE] = { 1, 0 }, + [AV_PIX_FMT_RGBA64LE] = { 1, 0 }, + [AV_PIX_FMT_RGB565BE] = { 1, 1 }, + [AV_PIX_FMT_RGB565LE] = { 1, 1 }, + [AV_PIX_FMT_RGB555BE] = { 1, 1 }, + [AV_PIX_FMT_RGB555LE] = { 1, 1 }, + [AV_PIX_FMT_BGR565BE] = { 1, 1 }, + [AV_PIX_FMT_BGR565LE] = { 1, 1 }, + [AV_PIX_FMT_BGR555BE] = { 1, 1 }, + [AV_PIX_FMT_BGR555LE] = { 1, 1 }, + [AV_PIX_FMT_YUV420P16LE] = { 1, 1 }, + [AV_PIX_FMT_YUV420P16BE] = { 1, 1 }, + [AV_PIX_FMT_YUV422P16LE] = { 1, 1 }, + [AV_PIX_FMT_YUV422P16BE] = { 1, 1 }, + [AV_PIX_FMT_YUV444P16LE] = { 1, 1 }, + [AV_PIX_FMT_YUV444P16BE] = { 1, 1 }, + [AV_PIX_FMT_RGB444LE] = { 1, 1 }, + [AV_PIX_FMT_RGB444BE] = { 1, 1 }, + [AV_PIX_FMT_BGR444LE] = { 1, 1 }, + [AV_PIX_FMT_BGR444BE] = { 1, 1 }, + [AV_PIX_FMT_Y400A] = { 1, 0 }, + [AV_PIX_FMT_BGR48BE] = { 1, 1 }, + [AV_PIX_FMT_BGR48LE] = { 1, 1 }, + [AV_PIX_FMT_BGRA64BE] = { 0, 0 }, + [AV_PIX_FMT_BGRA64LE] = { 0, 0 }, + [AV_PIX_FMT_YUV420P9BE] = { 1, 1 }, + [AV_PIX_FMT_YUV420P9LE] = { 1, 1 }, + [AV_PIX_FMT_YUV420P10BE] = { 1, 1 }, + [AV_PIX_FMT_YUV420P10LE] = { 1, 1 }, + [AV_PIX_FMT_YUV420P12BE] = { 1, 1 }, + [AV_PIX_FMT_YUV420P12LE] = { 1, 1 }, + [AV_PIX_FMT_YUV420P14BE] = { 1, 1 }, + [AV_PIX_FMT_YUV420P14LE] = { 1, 1 }, + [AV_PIX_FMT_YUV422P9BE] = { 1, 1 }, + [AV_PIX_FMT_YUV422P9LE] = { 1, 1 }, + [AV_PIX_FMT_YUV422P10BE] = { 1, 1 }, + [AV_PIX_FMT_YUV422P10LE] = { 1, 1 }, + [AV_PIX_FMT_YUV422P12BE] = { 1, 1 }, + [AV_PIX_FMT_YUV422P12LE] = { 1, 1 }, + [AV_PIX_FMT_YUV422P14BE] = { 1, 1 }, + [AV_PIX_FMT_YUV422P14LE] = { 1, 1 }, + [AV_PIX_FMT_YUV444P9BE] = { 1, 1 }, + [AV_PIX_FMT_YUV444P9LE] = { 1, 1 }, + [AV_PIX_FMT_YUV444P10BE] = { 1, 1 }, + [AV_PIX_FMT_YUV444P10LE] = { 1, 1 }, + [AV_PIX_FMT_YUV444P12BE] = { 1, 1 }, + [AV_PIX_FMT_YUV444P12LE] = { 1, 1 }, + [AV_PIX_FMT_YUV444P14BE] = { 1, 1 }, + [AV_PIX_FMT_YUV444P14LE] = { 1, 1 }, + [AV_PIX_FMT_GBRP] = { 1, 1 }, + [AV_PIX_FMT_GBRP9LE] = { 1, 1 }, + [AV_PIX_FMT_GBRP9BE] = { 1, 1 }, + [AV_PIX_FMT_GBRP10LE] = { 1, 1 }, + [AV_PIX_FMT_GBRP10BE] = { 1, 1 }, + [AV_PIX_FMT_GBRP12LE] = { 1, 1 }, + [AV_PIX_FMT_GBRP12BE] = { 1, 1 }, + [AV_PIX_FMT_GBRP14LE] = { 1, 1 }, + [AV_PIX_FMT_GBRP14BE] = { 1, 1 }, + [AV_PIX_FMT_GBRP16LE] = { 1, 0 }, + [AV_PIX_FMT_GBRP16BE] = { 1, 0 }, +}; + +int sws_isSupportedInput(enum AVPixelFormat pix_fmt) +{ + return (unsigned)pix_fmt < AV_PIX_FMT_NB ? + format_entries[pix_fmt].is_supported_in : 0; +} + +int sws_isSupportedOutput(enum AVPixelFormat pix_fmt) +{ + return (unsigned)pix_fmt < AV_PIX_FMT_NB ? + format_entries[pix_fmt].is_supported_out : 0; +} + +extern const int32_t ff_yuv2rgb_coeffs[8][4]; + +#if FF_API_SWS_FORMAT_NAME +const char *sws_format_name(enum AVPixelFormat format) +{ + const AVPixFmtDescriptor *desc = av_pix_fmt_desc_get(format); + if (desc) + return desc->name; + else + return "Unknown format"; +} +#endif + +static double getSplineCoeff(double a, double b, double c, double d, + double dist) +{ + if (dist <= 1.0) + return ((d * dist + c) * dist + b) * dist + a; + else + return getSplineCoeff(0.0, + b + 2.0 * c + 3.0 * d, + c + 3.0 * d, + -b - 3.0 * c - 6.0 * d, + dist - 1.0); +} + +static int initFilter(int16_t **outFilter, int32_t **filterPos, + int *outFilterSize, int xInc, int srcW, int dstW, + int filterAlign, int one, int flags, int cpu_flags, + SwsVector *srcFilter, SwsVector *dstFilter, + double param[2]) +{ + int i; + int filterSize; + int filter2Size; + int minFilterSize; + int64_t *filter = NULL; + int64_t *filter2 = NULL; + const int64_t fone = 1LL << (54 - FFMIN(av_log2(srcW/dstW), 8)); + int ret = -1; + + emms_c(); // FIXME should not be required but IS (even for non-MMX versions) + + // NOTE: the +3 is for the MMX(+1) / SSE(+3) scaler which reads over the end + FF_ALLOC_OR_GOTO(NULL, *filterPos, (dstW + 3) * sizeof(**filterPos), fail); + + if (FFABS(xInc - 0x10000) < 10) { // unscaled + int i; + filterSize = 1; + FF_ALLOCZ_OR_GOTO(NULL, filter, + dstW * sizeof(*filter) * filterSize, fail); + + for (i = 0; i < dstW; i++) { + filter[i * filterSize] = fone; + (*filterPos)[i] = i; + } + } else if (flags & SWS_POINT) { // lame looking point sampling mode + int i; + int64_t xDstInSrc; + filterSize = 1; + FF_ALLOC_OR_GOTO(NULL, filter, + dstW * sizeof(*filter) * filterSize, fail); + + xDstInSrc = xInc / 2 - 0x8000; + for (i = 0; i < dstW; i++) { + int xx = (xDstInSrc - ((filterSize - 1) << 15) + (1 << 15)) >> 16; + + (*filterPos)[i] = xx; + filter[i] = fone; + xDstInSrc += xInc; + } + } else if ((xInc <= (1 << 16) && (flags & SWS_AREA)) || + (flags & SWS_FAST_BILINEAR)) { // bilinear upscale + int i; + int64_t xDstInSrc; + filterSize = 2; + FF_ALLOC_OR_GOTO(NULL, filter, + dstW * sizeof(*filter) * filterSize, fail); + + xDstInSrc = xInc / 2 - 0x8000; + for (i = 0; i < dstW; i++) { + int xx = (xDstInSrc - ((filterSize - 1) << 15) + (1 << 15)) >> 16; + int j; + + (*filterPos)[i] = xx; + // bilinear upscale / linear interpolate / area averaging + for (j = 0; j < filterSize; j++) { + int64_t coeff= fone - FFABS(((int64_t)xx<<16) - xDstInSrc)*(fone>>16); + if (coeff < 0) + coeff = 0; + filter[i * filterSize + j] = coeff; + xx++; + } + xDstInSrc += xInc; + } + } else { + int64_t xDstInSrc; + int sizeFactor; + + if (flags & SWS_BICUBIC) + sizeFactor = 4; + else if (flags & SWS_X) + sizeFactor = 8; + else if (flags & SWS_AREA) + sizeFactor = 1; // downscale only, for upscale it is bilinear + else if (flags & SWS_GAUSS) + sizeFactor = 8; // infinite ;) + else if (flags & SWS_LANCZOS) + sizeFactor = param[0] != SWS_PARAM_DEFAULT ? ceil(2 * param[0]) : 6; + else if (flags & SWS_SINC) + sizeFactor = 20; // infinite ;) + else if (flags & SWS_SPLINE) + sizeFactor = 20; // infinite ;) + else if (flags & SWS_BILINEAR) + sizeFactor = 2; + else { + av_assert0(0); + } + + if (xInc <= 1 << 16) + filterSize = 1 + sizeFactor; // upscale + else + filterSize = 1 + (sizeFactor * srcW + dstW - 1) / dstW; + + filterSize = FFMIN(filterSize, srcW - 2); + filterSize = FFMAX(filterSize, 1); + + FF_ALLOC_OR_GOTO(NULL, filter, + dstW * sizeof(*filter) * filterSize, fail); + + xDstInSrc = xInc - 0x10000; + for (i = 0; i < dstW; i++) { + int xx = (xDstInSrc - ((filterSize - 2) << 16)) / (1 << 17); + int j; + (*filterPos)[i] = xx; + for (j = 0; j < filterSize; j++) { + int64_t d = (FFABS(((int64_t)xx << 17) - xDstInSrc)) << 13; + double floatd; + int64_t coeff; + + if (xInc > 1 << 16) + d = d * dstW / srcW; + floatd = d * (1.0 / (1 << 30)); + + if (flags & SWS_BICUBIC) { + int64_t B = (param[0] != SWS_PARAM_DEFAULT ? param[0] : 0) * (1 << 24); + int64_t C = (param[1] != SWS_PARAM_DEFAULT ? param[1] : 0.6) * (1 << 24); + + if (d >= 1LL << 31) { + coeff = 0.0; + } else { + int64_t dd = (d * d) >> 30; + int64_t ddd = (dd * d) >> 30; + + if (d < 1LL << 30) + coeff = (12 * (1 << 24) - 9 * B - 6 * C) * ddd + + (-18 * (1 << 24) + 12 * B + 6 * C) * dd + + (6 * (1 << 24) - 2 * B) * (1 << 30); + else + coeff = (-B - 6 * C) * ddd + + (6 * B + 30 * C) * dd + + (-12 * B - 48 * C) * d + + (8 * B + 24 * C) * (1 << 30); + } + coeff /= (1LL<<54)/fone; + } +#if 0 + else if (flags & SWS_X) { + double p = param ? param * 0.01 : 0.3; + coeff = d ? sin(d * M_PI) / (d * M_PI) : 1.0; + coeff *= pow(2.0, -p * d * d); + } +#endif + else if (flags & SWS_X) { + double A = param[0] != SWS_PARAM_DEFAULT ? param[0] : 1.0; + double c; + + if (floatd < 1.0) + c = cos(floatd * M_PI); + else + c = -1.0; + if (c < 0.0) + c = -pow(-c, A); + else + c = pow(c, A); + coeff = (c * 0.5 + 0.5) * fone; + } else if (flags & SWS_AREA) { + int64_t d2 = d - (1 << 29); + if (d2 * xInc < -(1LL << (29 + 16))) + coeff = 1.0 * (1LL << (30 + 16)); + else if (d2 * xInc < (1LL << (29 + 16))) + coeff = -d2 * xInc + (1LL << (29 + 16)); + else + coeff = 0.0; + coeff *= fone >> (30 + 16); + } else if (flags & SWS_GAUSS) { + double p = param[0] != SWS_PARAM_DEFAULT ? param[0] : 3.0; + coeff = (pow(2.0, -p * floatd * floatd)) * fone; + } else if (flags & SWS_SINC) { + coeff = (d ? sin(floatd * M_PI) / (floatd * M_PI) : 1.0) * fone; + } else if (flags & SWS_LANCZOS) { + double p = param[0] != SWS_PARAM_DEFAULT ? param[0] : 3.0; + coeff = (d ? sin(floatd * M_PI) * sin(floatd * M_PI / p) / + (floatd * floatd * M_PI * M_PI / p) : 1.0) * fone; + if (floatd > p) + coeff = 0; + } else if (flags & SWS_BILINEAR) { + coeff = (1 << 30) - d; + if (coeff < 0) + coeff = 0; + coeff *= fone >> 30; + } else if (flags & SWS_SPLINE) { + double p = -2.196152422706632; + coeff = getSplineCoeff(1.0, 0.0, p, -p - 1.0, floatd) * fone; + } else { + av_assert0(0); + } + + filter[i * filterSize + j] = coeff; + xx++; + } + xDstInSrc += 2 * xInc; + } + } + + /* apply src & dst Filter to filter -> filter2 + * av_free(filter); + */ + av_assert0(filterSize > 0); + filter2Size = filterSize; + if (srcFilter) + filter2Size += srcFilter->length - 1; + if (dstFilter) + filter2Size += dstFilter->length - 1; + av_assert0(filter2Size > 0); + FF_ALLOCZ_OR_GOTO(NULL, filter2, filter2Size * dstW * sizeof(*filter2), fail); + + for (i = 0; i < dstW; i++) { + int j, k; + + if (srcFilter) { + for (k = 0; k < srcFilter->length; k++) { + for (j = 0; j < filterSize; j++) + filter2[i * filter2Size + k + j] += + srcFilter->coeff[k] * filter[i * filterSize + j]; + } + } else { + for (j = 0; j < filterSize; j++) + filter2[i * filter2Size + j] = filter[i * filterSize + j]; + } + // FIXME dstFilter + + (*filterPos)[i] += (filterSize - 1) / 2 - (filter2Size - 1) / 2; + } + av_freep(&filter); + + /* try to reduce the filter-size (step1 find size and shift left) */ + // Assume it is near normalized (*0.5 or *2.0 is OK but * 0.001 is not). + minFilterSize = 0; + for (i = dstW - 1; i >= 0; i--) { + int min = filter2Size; + int j; + int64_t cutOff = 0.0; + + /* get rid of near zero elements on the left by shifting left */ + for (j = 0; j < filter2Size; j++) { + int k; + cutOff += FFABS(filter2[i * filter2Size]); + + if (cutOff > SWS_MAX_REDUCE_CUTOFF * fone) + break; + + /* preserve monotonicity because the core can't handle the + * filter otherwise */ + if (i < dstW - 1 && (*filterPos)[i] >= (*filterPos)[i + 1]) + break; + + // move filter coefficients left + for (k = 1; k < filter2Size; k++) + filter2[i * filter2Size + k - 1] = filter2[i * filter2Size + k]; + filter2[i * filter2Size + k - 1] = 0; + (*filterPos)[i]++; + } + + cutOff = 0; + /* count near zeros on the right */ + for (j = filter2Size - 1; j > 0; j--) { + cutOff += FFABS(filter2[i * filter2Size + j]); + + if (cutOff > SWS_MAX_REDUCE_CUTOFF * fone) + break; + min--; + } + + if (min > minFilterSize) + minFilterSize = min; + } + + if (HAVE_ALTIVEC && cpu_flags & AV_CPU_FLAG_ALTIVEC) { + // we can handle the special case 4, so we don't want to go the full 8 + if (minFilterSize < 5) + filterAlign = 4; + + /* We really don't want to waste our time doing useless computation, so + * fall back on the scalar C code for very small filters. + * Vectorizing is worth it only if you have a decent-sized vector. */ + if (minFilterSize < 3) + filterAlign = 1; + } + + if (INLINE_MMX(cpu_flags)) { + // special case for unscaled vertical filtering + if (minFilterSize == 1 && filterAlign == 2) + filterAlign = 1; + } + + av_assert0(minFilterSize > 0); + filterSize = (minFilterSize + (filterAlign - 1)) & (~(filterAlign - 1)); + av_assert0(filterSize > 0); + filter = av_malloc(filterSize * dstW * sizeof(*filter)); + if (filterSize >= MAX_FILTER_SIZE * 16 / + ((flags & SWS_ACCURATE_RND) ? APCK_SIZE : 16) || !filter) { + av_log(NULL, AV_LOG_ERROR, "sws: filterSize %d is too large, try less extreem scaling or increase MAX_FILTER_SIZE and recompile\n", filterSize); + goto fail; + } + *outFilterSize = filterSize; + + if (flags & SWS_PRINT_INFO) + av_log(NULL, AV_LOG_VERBOSE, + "SwScaler: reducing / aligning filtersize %d -> %d\n", + filter2Size, filterSize); + /* try to reduce the filter-size (step2 reduce it) */ + for (i = 0; i < dstW; i++) { + int j; + + for (j = 0; j < filterSize; j++) { + if (j >= filter2Size) + filter[i * filterSize + j] = 0; + else + filter[i * filterSize + j] = filter2[i * filter2Size + j]; + if ((flags & SWS_BITEXACT) && j >= minFilterSize) + filter[i * filterSize + j] = 0; + } + } + + // FIXME try to align filterPos if possible + + // fix borders + for (i = 0; i < dstW; i++) { + int j; + if ((*filterPos)[i] < 0) { + // move filter coefficients left to compensate for filterPos + for (j = 1; j < filterSize; j++) { + int left = FFMAX(j + (*filterPos)[i], 0); + filter[i * filterSize + left] += filter[i * filterSize + j]; + filter[i * filterSize + j] = 0; + } + (*filterPos)[i]= 0; + } + + if ((*filterPos)[i] + filterSize > srcW) { + int shift = (*filterPos)[i] + filterSize - srcW; + // move filter coefficients right to compensate for filterPos + for (j = filterSize - 2; j >= 0; j--) { + int right = FFMIN(j + shift, filterSize - 1); + filter[i * filterSize + right] += filter[i * filterSize + j]; + filter[i * filterSize + j] = 0; + } + (*filterPos)[i]= srcW - filterSize; + } + } + + // Note the +1 is for the MMX scaler which reads over the end + /* align at 16 for AltiVec (needed by hScale_altivec_real) */ + FF_ALLOCZ_OR_GOTO(NULL, *outFilter, + *outFilterSize * (dstW + 3) * sizeof(int16_t), fail); + + /* normalize & store in outFilter */ + for (i = 0; i < dstW; i++) { + int j; + int64_t error = 0; + int64_t sum = 0; + + for (j = 0; j < filterSize; j++) { + sum += filter[i * filterSize + j]; + } + sum = (sum + one / 2) / one; + for (j = 0; j < *outFilterSize; j++) { + int64_t v = filter[i * filterSize + j] + error; + int intV = ROUNDED_DIV(v, sum); + (*outFilter)[i * (*outFilterSize) + j] = intV; + error = v - intV * sum; + } + } + + (*filterPos)[dstW + 0] = + (*filterPos)[dstW + 1] = + (*filterPos)[dstW + 2] = (*filterPos)[dstW - 1]; /* the MMX/SSE scaler will + * read over the end */ + for (i = 0; i < *outFilterSize; i++) { + int k = (dstW - 1) * (*outFilterSize) + i; + (*outFilter)[k + 1 * (*outFilterSize)] = + (*outFilter)[k + 2 * (*outFilterSize)] = + (*outFilter)[k + 3 * (*outFilterSize)] = (*outFilter)[k]; + } + + ret = 0; + +fail: + if(ret < 0) + av_log(NULL, AV_LOG_ERROR, "sws: initFilter failed\n"); + av_free(filter); + av_free(filter2); + return ret; +} + +#if HAVE_MMXEXT_INLINE +static int init_hscaler_mmxext(int dstW, int xInc, uint8_t *filterCode, + int16_t *filter, int32_t *filterPos, + int numSplits) +{ + uint8_t *fragmentA; + x86_reg imm8OfPShufW1A; + x86_reg imm8OfPShufW2A; + x86_reg fragmentLengthA; + uint8_t *fragmentB; + x86_reg imm8OfPShufW1B; + x86_reg imm8OfPShufW2B; + x86_reg fragmentLengthB; + int fragmentPos; + + int xpos, i; + + // create an optimized horizontal scaling routine + /* This scaler is made of runtime-generated MMXEXT code using specially tuned + * pshufw instructions. For every four output pixels, if four input pixels + * are enough for the fast bilinear scaling, then a chunk of fragmentB is + * used. If five input pixels are needed, then a chunk of fragmentA is used. + */ + + // code fragment + + __asm__ volatile ( + "jmp 9f \n\t" + // Begin + "0: \n\t" + "movq (%%"REG_d", %%"REG_a"), %%mm3 \n\t" + "movd (%%"REG_c", %%"REG_S"), %%mm0 \n\t" + "movd 1(%%"REG_c", %%"REG_S"), %%mm1 \n\t" + "punpcklbw %%mm7, %%mm1 \n\t" + "punpcklbw %%mm7, %%mm0 \n\t" + "pshufw $0xFF, %%mm1, %%mm1 \n\t" + "1: \n\t" + "pshufw $0xFF, %%mm0, %%mm0 \n\t" + "2: \n\t" + "psubw %%mm1, %%mm0 \n\t" + "movl 8(%%"REG_b", %%"REG_a"), %%esi \n\t" + "pmullw %%mm3, %%mm0 \n\t" + "psllw $7, %%mm1 \n\t" + "paddw %%mm1, %%mm0 \n\t" + + "movq %%mm0, (%%"REG_D", %%"REG_a") \n\t" + + "add $8, %%"REG_a" \n\t" + // End + "9: \n\t" + // "int $3 \n\t" + "lea " LOCAL_MANGLE(0b) ", %0 \n\t" + "lea " LOCAL_MANGLE(1b) ", %1 \n\t" + "lea " LOCAL_MANGLE(2b) ", %2 \n\t" + "dec %1 \n\t" + "dec %2 \n\t" + "sub %0, %1 \n\t" + "sub %0, %2 \n\t" + "lea " LOCAL_MANGLE(9b) ", %3 \n\t" + "sub %0, %3 \n\t" + + + : "=r" (fragmentA), "=r" (imm8OfPShufW1A), "=r" (imm8OfPShufW2A), + "=r" (fragmentLengthA) + ); + + __asm__ volatile ( + "jmp 9f \n\t" + // Begin + "0: \n\t" + "movq (%%"REG_d", %%"REG_a"), %%mm3 \n\t" + "movd (%%"REG_c", %%"REG_S"), %%mm0 \n\t" + "punpcklbw %%mm7, %%mm0 \n\t" + "pshufw $0xFF, %%mm0, %%mm1 \n\t" + "1: \n\t" + "pshufw $0xFF, %%mm0, %%mm0 \n\t" + "2: \n\t" + "psubw %%mm1, %%mm0 \n\t" + "movl 8(%%"REG_b", %%"REG_a"), %%esi \n\t" + "pmullw %%mm3, %%mm0 \n\t" + "psllw $7, %%mm1 \n\t" + "paddw %%mm1, %%mm0 \n\t" + + "movq %%mm0, (%%"REG_D", %%"REG_a") \n\t" + + "add $8, %%"REG_a" \n\t" + // End + "9: \n\t" + // "int $3 \n\t" + "lea " LOCAL_MANGLE(0b) ", %0 \n\t" + "lea " LOCAL_MANGLE(1b) ", %1 \n\t" + "lea " LOCAL_MANGLE(2b) ", %2 \n\t" + "dec %1 \n\t" + "dec %2 \n\t" + "sub %0, %1 \n\t" + "sub %0, %2 \n\t" + "lea " LOCAL_MANGLE(9b) ", %3 \n\t" + "sub %0, %3 \n\t" + + + : "=r" (fragmentB), "=r" (imm8OfPShufW1B), "=r" (imm8OfPShufW2B), + "=r" (fragmentLengthB) + ); + + xpos = 0; // lumXInc/2 - 0x8000; // difference between pixel centers + fragmentPos = 0; + + for (i = 0; i < dstW / numSplits; i++) { + int xx = xpos >> 16; + + if ((i & 3) == 0) { + int a = 0; + int b = ((xpos + xInc) >> 16) - xx; + int c = ((xpos + xInc * 2) >> 16) - xx; + int d = ((xpos + xInc * 3) >> 16) - xx; + int inc = (d + 1 < 4); + uint8_t *fragment = (d + 1 < 4) ? fragmentB : fragmentA; + x86_reg imm8OfPShufW1 = (d + 1 < 4) ? imm8OfPShufW1B : imm8OfPShufW1A; + x86_reg imm8OfPShufW2 = (d + 1 < 4) ? imm8OfPShufW2B : imm8OfPShufW2A; + x86_reg fragmentLength = (d + 1 < 4) ? fragmentLengthB : fragmentLengthA; + int maxShift = 3 - (d + inc); + int shift = 0; + + if (filterCode) { + filter[i] = ((xpos & 0xFFFF) ^ 0xFFFF) >> 9; + filter[i + 1] = (((xpos + xInc) & 0xFFFF) ^ 0xFFFF) >> 9; + filter[i + 2] = (((xpos + xInc * 2) & 0xFFFF) ^ 0xFFFF) >> 9; + filter[i + 3] = (((xpos + xInc * 3) & 0xFFFF) ^ 0xFFFF) >> 9; + filterPos[i / 2] = xx; + + memcpy(filterCode + fragmentPos, fragment, fragmentLength); + + filterCode[fragmentPos + imm8OfPShufW1] = (a + inc) | + ((b + inc) << 2) | + ((c + inc) << 4) | + ((d + inc) << 6); + filterCode[fragmentPos + imm8OfPShufW2] = a | (b << 2) | + (c << 4) | + (d << 6); + + if (i + 4 - inc >= dstW) + shift = maxShift; // avoid overread + else if ((filterPos[i / 2] & 3) <= maxShift) + shift = filterPos[i / 2] & 3; // align + + if (shift && i >= shift) { + filterCode[fragmentPos + imm8OfPShufW1] += 0x55 * shift; + filterCode[fragmentPos + imm8OfPShufW2] += 0x55 * shift; + filterPos[i / 2] -= shift; + } + } + + fragmentPos += fragmentLength; + + if (filterCode) + filterCode[fragmentPos] = RET; + } + xpos += xInc; + } + if (filterCode) + filterPos[((i / 2) + 1) & (~1)] = xpos >> 16; // needed to jump to the next part + + return fragmentPos + 1; +} +#endif /* HAVE_MMXEXT_INLINE */ + +static void getSubSampleFactors(int *h, int *v, enum AVPixelFormat format) +{ + const AVPixFmtDescriptor *desc = av_pix_fmt_desc_get(format); + *h = desc->log2_chroma_w; + *v = desc->log2_chroma_h; +} + +int sws_setColorspaceDetails(struct SwsContext *c, const int inv_table[4], + int srcRange, const int table[4], int dstRange, + int brightness, int contrast, int saturation) +{ + const AVPixFmtDescriptor *desc_dst = av_pix_fmt_desc_get(c->dstFormat); + const AVPixFmtDescriptor *desc_src = av_pix_fmt_desc_get(c->srcFormat); + memcpy(c->srcColorspaceTable, inv_table, sizeof(int) * 4); + memcpy(c->dstColorspaceTable, table, sizeof(int) * 4); + + if(!isYUV(c->dstFormat) && !isGray(c->dstFormat)) + dstRange = 0; + if(!isYUV(c->srcFormat) && !isGray(c->srcFormat)) + srcRange = 0; + + c->brightness = brightness; + c->contrast = contrast; + c->saturation = saturation; + c->srcRange = srcRange; + c->dstRange = dstRange; + + if (isYUV(c->dstFormat) || isGray(c->dstFormat)) + return -1; + + c->dstFormatBpp = av_get_bits_per_pixel(desc_dst); + c->srcFormatBpp = av_get_bits_per_pixel(desc_src); + + ff_yuv2rgb_c_init_tables(c, inv_table, srcRange, brightness, + contrast, saturation); + // FIXME factorize + + if (HAVE_ALTIVEC && av_get_cpu_flags() & AV_CPU_FLAG_ALTIVEC) + ff_yuv2rgb_init_tables_altivec(c, inv_table, brightness, + contrast, saturation); + return 0; +} + +int sws_getColorspaceDetails(struct SwsContext *c, int **inv_table, + int *srcRange, int **table, int *dstRange, + int *brightness, int *contrast, int *saturation) +{ + if (!c || isYUV(c->dstFormat) || isGray(c->dstFormat)) + return -1; + + *inv_table = c->srcColorspaceTable; + *table = c->dstColorspaceTable; + *srcRange = c->srcRange; + *dstRange = c->dstRange; + *brightness = c->brightness; + *contrast = c->contrast; + *saturation = c->saturation; + + return 0; +} + +static int handle_jpeg(enum AVPixelFormat *format) +{ + switch (*format) { + case AV_PIX_FMT_YUVJ420P: + *format = AV_PIX_FMT_YUV420P; + return 1; + case AV_PIX_FMT_YUVJ422P: + *format = AV_PIX_FMT_YUV422P; + return 1; + case AV_PIX_FMT_YUVJ444P: + *format = AV_PIX_FMT_YUV444P; + return 1; + case AV_PIX_FMT_YUVJ440P: + *format = AV_PIX_FMT_YUV440P; + return 1; + default: + return 0; + } +} + +static int handle_0alpha(enum AVPixelFormat *format) +{ + switch (*format) { + case AV_PIX_FMT_0BGR : *format = AV_PIX_FMT_ABGR ; return 1; + case AV_PIX_FMT_BGR0 : *format = AV_PIX_FMT_BGRA ; return 4; + case AV_PIX_FMT_0RGB : *format = AV_PIX_FMT_ARGB ; return 1; + case AV_PIX_FMT_RGB0 : *format = AV_PIX_FMT_RGBA ; return 4; + default: return 0; + } +} + +SwsContext *sws_alloc_context(void) +{ + SwsContext *c = av_mallocz(sizeof(SwsContext)); + + if (c) { + c->av_class = &sws_context_class; + av_opt_set_defaults(c); + } + + return c; +} + +av_cold int sws_init_context(SwsContext *c, SwsFilter *srcFilter, + SwsFilter *dstFilter) +{ + int i, j; + int usesVFilter, usesHFilter; + int unscaled; + SwsFilter dummyFilter = { NULL, NULL, NULL, NULL }; + int srcW = c->srcW; + int srcH = c->srcH; + int dstW = c->dstW; + int dstH = c->dstH; + int dst_stride = FFALIGN(dstW * sizeof(int16_t) + 66, 16); + int flags, cpu_flags; + enum AVPixelFormat srcFormat = c->srcFormat; + enum AVPixelFormat dstFormat = c->dstFormat; + const AVPixFmtDescriptor *desc_src = av_pix_fmt_desc_get(srcFormat); + const AVPixFmtDescriptor *desc_dst = av_pix_fmt_desc_get(dstFormat); + + cpu_flags = av_get_cpu_flags(); + flags = c->flags; + emms_c(); + if (!rgb15to16) + sws_rgb2rgb_init(); + + unscaled = (srcW == dstW && srcH == dstH); + + handle_jpeg(&srcFormat); + handle_jpeg(&dstFormat); + handle_0alpha(&srcFormat); + handle_0alpha(&dstFormat); + + if(srcFormat!=c->srcFormat || dstFormat!=c->dstFormat){ + av_log(c, AV_LOG_WARNING, "deprecated pixel format used, make sure you did set range correctly\n"); + c->srcFormat= srcFormat; + c->dstFormat= dstFormat; + } + + if (!sws_isSupportedInput(srcFormat)) { + av_log(c, AV_LOG_ERROR, "%s is not supported as input pixel format\n", + av_get_pix_fmt_name(srcFormat)); + return AVERROR(EINVAL); + } + if (!sws_isSupportedOutput(dstFormat)) { + av_log(c, AV_LOG_ERROR, "%s is not supported as output pixel format\n", + av_get_pix_fmt_name(dstFormat)); + return AVERROR(EINVAL); + } + + i = flags & (SWS_POINT | + SWS_AREA | + SWS_BILINEAR | + SWS_FAST_BILINEAR | + SWS_BICUBIC | + SWS_X | + SWS_GAUSS | + SWS_LANCZOS | + SWS_SINC | + SWS_SPLINE | + SWS_BICUBLIN); + if (!i || (i & (i - 1))) { + av_log(c, AV_LOG_ERROR, "Exactly one scaler algorithm must be chosen, got %X\n", i); + return AVERROR(EINVAL); + } + /* sanity check */ + if (srcW < 1 || srcH < 1 || dstW < 1 || dstH < 1) { + /* FIXME check if these are enough and try to lower them after + * fixing the relevant parts of the code */ + av_log(c, AV_LOG_ERROR, "%dx%d -> %dx%d is invalid scaling dimension\n", + srcW, srcH, dstW, dstH); + return AVERROR(EINVAL); + } + + if (!dstFilter) + dstFilter = &dummyFilter; + if (!srcFilter) + srcFilter = &dummyFilter; + + c->lumXInc = (((int64_t)srcW << 16) + (dstW >> 1)) / dstW; + c->lumYInc = (((int64_t)srcH << 16) + (dstH >> 1)) / dstH; + c->dstFormatBpp = av_get_bits_per_pixel(desc_dst); + c->srcFormatBpp = av_get_bits_per_pixel(desc_src); + c->vRounder = 4 * 0x0001000100010001ULL; + + usesVFilter = (srcFilter->lumV && srcFilter->lumV->length > 1) || + (srcFilter->chrV && srcFilter->chrV->length > 1) || + (dstFilter->lumV && dstFilter->lumV->length > 1) || + (dstFilter->chrV && dstFilter->chrV->length > 1); + usesHFilter = (srcFilter->lumH && srcFilter->lumH->length > 1) || + (srcFilter->chrH && srcFilter->chrH->length > 1) || + (dstFilter->lumH && dstFilter->lumH->length > 1) || + (dstFilter->chrH && dstFilter->chrH->length > 1); + + getSubSampleFactors(&c->chrSrcHSubSample, &c->chrSrcVSubSample, srcFormat); + getSubSampleFactors(&c->chrDstHSubSample, &c->chrDstVSubSample, dstFormat); + + if (isAnyRGB(dstFormat) && !(flags&SWS_FULL_CHR_H_INT)) { + if (dstW&1) { + av_log(c, AV_LOG_DEBUG, "Forcing full internal H chroma due to odd output size\n"); + flags |= SWS_FULL_CHR_H_INT; + c->flags = flags; + } + } + + if(dstFormat == AV_PIX_FMT_BGR4_BYTE || + dstFormat == AV_PIX_FMT_RGB4_BYTE || + dstFormat == AV_PIX_FMT_BGR8 || + dstFormat == AV_PIX_FMT_RGB8) { + if (flags & SWS_ERROR_DIFFUSION && !(flags & SWS_FULL_CHR_H_INT)) { + av_log(c, AV_LOG_DEBUG, + "Error diffusion dither is only supported in full chroma interpolation for destination format '%s'\n", + av_get_pix_fmt_name(dstFormat)); + flags |= SWS_FULL_CHR_H_INT; + c->flags = flags; + } + if (!(flags & SWS_ERROR_DIFFUSION) && (flags & SWS_FULL_CHR_H_INT)) { + av_log(c, AV_LOG_DEBUG, + "Ordered dither is not supported in full chroma interpolation for destination format '%s'\n", + av_get_pix_fmt_name(dstFormat)); + flags |= SWS_ERROR_DIFFUSION; + c->flags = flags; + } + } + if (isPlanarRGB(dstFormat)) { + if (!(flags & SWS_FULL_CHR_H_INT)) { + av_log(c, AV_LOG_DEBUG, + "%s output is not supported with half chroma resolution, switching to full\n", + av_get_pix_fmt_name(dstFormat)); + flags |= SWS_FULL_CHR_H_INT; + c->flags = flags; + } + } + + /* reuse chroma for 2 pixels RGB/BGR unless user wants full + * chroma interpolation */ + if (flags & SWS_FULL_CHR_H_INT && + isAnyRGB(dstFormat) && + !isPlanarRGB(dstFormat) && + dstFormat != AV_PIX_FMT_RGBA && + dstFormat != AV_PIX_FMT_ARGB && + dstFormat != AV_PIX_FMT_BGRA && + dstFormat != AV_PIX_FMT_ABGR && + dstFormat != AV_PIX_FMT_RGB24 && + dstFormat != AV_PIX_FMT_BGR24 && + dstFormat != AV_PIX_FMT_BGR4_BYTE && + dstFormat != AV_PIX_FMT_RGB4_BYTE && + dstFormat != AV_PIX_FMT_BGR8 && + dstFormat != AV_PIX_FMT_RGB8 + ) { + av_log(c, AV_LOG_WARNING, + "full chroma interpolation for destination format '%s' not yet implemented\n", + av_get_pix_fmt_name(dstFormat)); + flags &= ~SWS_FULL_CHR_H_INT; + c->flags = flags; + } + if (isAnyRGB(dstFormat) && !(flags & SWS_FULL_CHR_H_INT)) + c->chrDstHSubSample = 1; + + // drop some chroma lines if the user wants it + c->vChrDrop = (flags & SWS_SRC_V_CHR_DROP_MASK) >> + SWS_SRC_V_CHR_DROP_SHIFT; + c->chrSrcVSubSample += c->vChrDrop; + + /* drop every other pixel for chroma calculation unless user + * wants full chroma */ + if (isAnyRGB(srcFormat) && !(flags & SWS_FULL_CHR_H_INP) && + srcFormat != AV_PIX_FMT_RGB8 && srcFormat != AV_PIX_FMT_BGR8 && + srcFormat != AV_PIX_FMT_RGB4 && srcFormat != AV_PIX_FMT_BGR4 && + srcFormat != AV_PIX_FMT_RGB4_BYTE && srcFormat != AV_PIX_FMT_BGR4_BYTE && + srcFormat != AV_PIX_FMT_GBRP9BE && srcFormat != AV_PIX_FMT_GBRP9LE && + srcFormat != AV_PIX_FMT_GBRP10BE && srcFormat != AV_PIX_FMT_GBRP10LE && + srcFormat != AV_PIX_FMT_GBRP12BE && srcFormat != AV_PIX_FMT_GBRP12LE && + srcFormat != AV_PIX_FMT_GBRP14BE && srcFormat != AV_PIX_FMT_GBRP14LE && + srcFormat != AV_PIX_FMT_GBRP16BE && srcFormat != AV_PIX_FMT_GBRP16LE && + ((dstW >> c->chrDstHSubSample) <= (srcW >> 1) || + (flags & SWS_FAST_BILINEAR))) + c->chrSrcHSubSample = 1; + + // Note the -((-x)>>y) is so that we always round toward +inf. + c->chrSrcW = -((-srcW) >> c->chrSrcHSubSample); + c->chrSrcH = -((-srcH) >> c->chrSrcVSubSample); + c->chrDstW = -((-dstW) >> c->chrDstHSubSample); + c->chrDstH = -((-dstH) >> c->chrDstVSubSample); + + FF_ALLOC_OR_GOTO(c, c->formatConvBuffer, FFALIGN(srcW*2+78, 16) * 2, fail); + + /* unscaled special cases */ + if (unscaled && !usesHFilter && !usesVFilter && + (c->srcRange == c->dstRange || isAnyRGB(dstFormat))) { + ff_get_unscaled_swscale(c); + + if (c->swScale) { + if (flags & SWS_PRINT_INFO) + av_log(c, AV_LOG_INFO, + "using unscaled %s -> %s special converter\n", + av_get_pix_fmt_name(srcFormat), av_get_pix_fmt_name(dstFormat)); + return 0; + } + } + + c->srcBpc = 1 + desc_src->comp[0].depth_minus1; + if (c->srcBpc < 8) + c->srcBpc = 8; + c->dstBpc = 1 + desc_dst->comp[0].depth_minus1; + if (c->dstBpc < 8) + c->dstBpc = 8; + if (isAnyRGB(srcFormat) || srcFormat == AV_PIX_FMT_PAL8) + c->srcBpc = 16; + if (c->dstBpc == 16) + dst_stride <<= 1; + + if (INLINE_MMXEXT(cpu_flags) && c->srcBpc == 8 && c->dstBpc <= 14) { + c->canMMXEXTBeUsed = (dstW >= srcW && (dstW & 31) == 0 && + (srcW & 15) == 0) ? 1 : 0; + if (!c->canMMXEXTBeUsed && dstW >= srcW && (srcW & 15) == 0 + + && (flags & SWS_FAST_BILINEAR)) { + if (flags & SWS_PRINT_INFO) + av_log(c, AV_LOG_INFO, + "output width is not a multiple of 32 -> no MMXEXT scaler\n"); + } + if (usesHFilter || isNBPS(c->srcFormat) || is16BPS(c->srcFormat) || isAnyRGB(c->srcFormat)) + c->canMMXEXTBeUsed = 0; + } else + c->canMMXEXTBeUsed = 0; + + c->chrXInc = (((int64_t)c->chrSrcW << 16) + (c->chrDstW >> 1)) / c->chrDstW; + c->chrYInc = (((int64_t)c->chrSrcH << 16) + (c->chrDstH >> 1)) / c->chrDstH; + + /* Match pixel 0 of the src to pixel 0 of dst and match pixel n-2 of src + * to pixel n-2 of dst, but only for the FAST_BILINEAR mode otherwise do + * correct scaling. + * n-2 is the last chrominance sample available. + * This is not perfect, but no one should notice the difference, the more + * correct variant would be like the vertical one, but that would require + * some special code for the first and last pixel */ + if (flags & SWS_FAST_BILINEAR) { + if (c->canMMXEXTBeUsed) { + c->lumXInc += 20; + c->chrXInc += 20; + } + // we don't use the x86 asm scaler if MMX is available + else if (INLINE_MMX(cpu_flags) && c->dstBpc <= 14) { + c->lumXInc = ((int64_t)(srcW - 2) << 16) / (dstW - 2) - 20; + c->chrXInc = ((int64_t)(c->chrSrcW - 2) << 16) / (c->chrDstW - 2) - 20; + } + } + +#define USE_MMAP (HAVE_MMAP && HAVE_MPROTECT && defined MAP_ANONYMOUS) + + /* precalculate horizontal scaler filter coefficients */ + { +#if HAVE_MMXEXT_INLINE +// can't downscale !!! + if (c->canMMXEXTBeUsed && (flags & SWS_FAST_BILINEAR)) { + c->lumMmxextFilterCodeSize = init_hscaler_mmxext(dstW, c->lumXInc, NULL, + NULL, NULL, 8); + c->chrMmxextFilterCodeSize = init_hscaler_mmxext(c->chrDstW, c->chrXInc, + NULL, NULL, NULL, 4); + +#if USE_MMAP + c->lumMmxextFilterCode = mmap(NULL, c->lumMmxextFilterCodeSize, + PROT_READ | PROT_WRITE, + MAP_PRIVATE | MAP_ANONYMOUS, + -1, 0); + c->chrMmxextFilterCode = mmap(NULL, c->chrMmxextFilterCodeSize, + PROT_READ | PROT_WRITE, + MAP_PRIVATE | MAP_ANONYMOUS, + -1, 0); +#elif HAVE_VIRTUALALLOC + c->lumMmxextFilterCode = VirtualAlloc(NULL, + c->lumMmxextFilterCodeSize, + MEM_COMMIT, + PAGE_EXECUTE_READWRITE); + c->chrMmxextFilterCode = VirtualAlloc(NULL, + c->chrMmxextFilterCodeSize, + MEM_COMMIT, + PAGE_EXECUTE_READWRITE); +#else + c->lumMmxextFilterCode = av_malloc(c->lumMmxextFilterCodeSize); + c->chrMmxextFilterCode = av_malloc(c->chrMmxextFilterCodeSize); +#endif + +#ifdef MAP_ANONYMOUS + if (c->lumMmxextFilterCode == MAP_FAILED || c->chrMmxextFilterCode == MAP_FAILED) +#else + if (!c->lumMmxextFilterCode || !c->chrMmxextFilterCode) +#endif + { + av_log(c, AV_LOG_ERROR, "Failed to allocate MMX2FilterCode\n"); + return AVERROR(ENOMEM); + } + + FF_ALLOCZ_OR_GOTO(c, c->hLumFilter, (dstW / 8 + 8) * sizeof(int16_t), fail); + FF_ALLOCZ_OR_GOTO(c, c->hChrFilter, (c->chrDstW / 4 + 8) * sizeof(int16_t), fail); + FF_ALLOCZ_OR_GOTO(c, c->hLumFilterPos, (dstW / 2 / 8 + 8) * sizeof(int32_t), fail); + FF_ALLOCZ_OR_GOTO(c, c->hChrFilterPos, (c->chrDstW / 2 / 4 + 8) * sizeof(int32_t), fail); + + init_hscaler_mmxext( dstW, c->lumXInc, c->lumMmxextFilterCode, + c->hLumFilter, (uint32_t*)c->hLumFilterPos, 8); + init_hscaler_mmxext(c->chrDstW, c->chrXInc, c->chrMmxextFilterCode, + c->hChrFilter, (uint32_t*)c->hChrFilterPos, 4); + +#if USE_MMAP + mprotect(c->lumMmxextFilterCode, c->lumMmxextFilterCodeSize, PROT_EXEC | PROT_READ); + mprotect(c->chrMmxextFilterCode, c->chrMmxextFilterCodeSize, PROT_EXEC | PROT_READ); +#endif + } else +#endif /* HAVE_MMXEXT_INLINE */ + { + const int filterAlign = + (HAVE_MMX && cpu_flags & AV_CPU_FLAG_MMX) ? 4 : + (HAVE_ALTIVEC && cpu_flags & AV_CPU_FLAG_ALTIVEC) ? 8 : + 1; + + if (initFilter(&c->hLumFilter, &c->hLumFilterPos, + &c->hLumFilterSize, c->lumXInc, + srcW, dstW, filterAlign, 1 << 14, + (flags & SWS_BICUBLIN) ? (flags | SWS_BICUBIC) : flags, + cpu_flags, srcFilter->lumH, dstFilter->lumH, + c->param) < 0) + goto fail; + if (initFilter(&c->hChrFilter, &c->hChrFilterPos, + &c->hChrFilterSize, c->chrXInc, + c->chrSrcW, c->chrDstW, filterAlign, 1 << 14, + (flags & SWS_BICUBLIN) ? (flags | SWS_BILINEAR) : flags, + cpu_flags, srcFilter->chrH, dstFilter->chrH, + c->param) < 0) + goto fail; + } + } // initialize horizontal stuff + + /* precalculate vertical scaler filter coefficients */ + { + const int filterAlign = + (HAVE_MMX && cpu_flags & AV_CPU_FLAG_MMX) ? 2 : + (HAVE_ALTIVEC && cpu_flags & AV_CPU_FLAG_ALTIVEC) ? 8 : + 1; + + if (initFilter(&c->vLumFilter, &c->vLumFilterPos, &c->vLumFilterSize, + c->lumYInc, srcH, dstH, filterAlign, (1 << 12), + (flags & SWS_BICUBLIN) ? (flags | SWS_BICUBIC) : flags, + cpu_flags, srcFilter->lumV, dstFilter->lumV, + c->param) < 0) + goto fail; + if (initFilter(&c->vChrFilter, &c->vChrFilterPos, &c->vChrFilterSize, + c->chrYInc, c->chrSrcH, c->chrDstH, + filterAlign, (1 << 12), + (flags & SWS_BICUBLIN) ? (flags | SWS_BILINEAR) : flags, + cpu_flags, srcFilter->chrV, dstFilter->chrV, + c->param) < 0) + goto fail; + +#if HAVE_ALTIVEC + FF_ALLOC_OR_GOTO(c, c->vYCoeffsBank, sizeof(vector signed short) * c->vLumFilterSize * c->dstH, fail); + FF_ALLOC_OR_GOTO(c, c->vCCoeffsBank, sizeof(vector signed short) * c->vChrFilterSize * c->chrDstH, fail); + + for (i = 0; i < c->vLumFilterSize * c->dstH; i++) { + int j; + short *p = (short *)&c->vYCoeffsBank[i]; + for (j = 0; j < 8; j++) + p[j] = c->vLumFilter[i]; + } + + for (i = 0; i < c->vChrFilterSize * c->chrDstH; i++) { + int j; + short *p = (short *)&c->vCCoeffsBank[i]; + for (j = 0; j < 8; j++) + p[j] = c->vChrFilter[i]; + } +#endif + } + + // calculate buffer sizes so that they won't run out while handling these damn slices + c->vLumBufSize = c->vLumFilterSize; + c->vChrBufSize = c->vChrFilterSize; + for (i = 0; i < dstH; i++) { + int chrI = (int64_t)i * c->chrDstH / dstH; + int nextSlice = FFMAX(c->vLumFilterPos[i] + c->vLumFilterSize - 1, + ((c->vChrFilterPos[chrI] + c->vChrFilterSize - 1) + << c->chrSrcVSubSample)); + + nextSlice >>= c->chrSrcVSubSample; + nextSlice <<= c->chrSrcVSubSample; + if (c->vLumFilterPos[i] + c->vLumBufSize < nextSlice) + c->vLumBufSize = nextSlice - c->vLumFilterPos[i]; + if (c->vChrFilterPos[chrI] + c->vChrBufSize < + (nextSlice >> c->chrSrcVSubSample)) + c->vChrBufSize = (nextSlice >> c->chrSrcVSubSample) - + c->vChrFilterPos[chrI]; + } + + for (i = 0; i < 4; i++) + FF_ALLOCZ_OR_GOTO(c, c->dither_error[i], (c->dstW+2) * sizeof(int), fail); + + /* Allocate pixbufs (we use dynamic allocation because otherwise we would + * need to allocate several megabytes to handle all possible cases) */ + FF_ALLOC_OR_GOTO(c, c->lumPixBuf, c->vLumBufSize * 3 * sizeof(int16_t *), fail); + FF_ALLOC_OR_GOTO(c, c->chrUPixBuf, c->vChrBufSize * 3 * sizeof(int16_t *), fail); + FF_ALLOC_OR_GOTO(c, c->chrVPixBuf, c->vChrBufSize * 3 * sizeof(int16_t *), fail); + if (CONFIG_SWSCALE_ALPHA && isALPHA(c->srcFormat) && isALPHA(c->dstFormat)) + FF_ALLOCZ_OR_GOTO(c, c->alpPixBuf, c->vLumBufSize * 3 * sizeof(int16_t *), fail); + /* Note we need at least one pixel more at the end because of the MMX code + * (just in case someone wants to replace the 4000/8000). */ + /* align at 16 bytes for AltiVec */ + for (i = 0; i < c->vLumBufSize; i++) { + FF_ALLOCZ_OR_GOTO(c, c->lumPixBuf[i + c->vLumBufSize], + dst_stride + 16, fail); + c->lumPixBuf[i] = c->lumPixBuf[i + c->vLumBufSize]; + } + // 64 / c->scalingBpp is the same as 16 / sizeof(scaling_intermediate) + c->uv_off = (dst_stride>>1) + 64 / (c->dstBpc &~ 7); + c->uv_offx2 = dst_stride + 16; + for (i = 0; i < c->vChrBufSize; i++) { + FF_ALLOC_OR_GOTO(c, c->chrUPixBuf[i + c->vChrBufSize], + dst_stride * 2 + 32, fail); + c->chrUPixBuf[i] = c->chrUPixBuf[i + c->vChrBufSize]; + c->chrVPixBuf[i] = c->chrVPixBuf[i + c->vChrBufSize] + = c->chrUPixBuf[i] + (dst_stride >> 1) + 8; + } + if (CONFIG_SWSCALE_ALPHA && c->alpPixBuf) + for (i = 0; i < c->vLumBufSize; i++) { + FF_ALLOCZ_OR_GOTO(c, c->alpPixBuf[i + c->vLumBufSize], + dst_stride + 16, fail); + c->alpPixBuf[i] = c->alpPixBuf[i + c->vLumBufSize]; + } + + // try to avoid drawing green stuff between the right end and the stride end + for (i = 0; i < c->vChrBufSize; i++) + if(desc_dst->comp[0].depth_minus1 == 15){ + av_assert0(c->dstBpc > 14); + for(j=0; j<dst_stride/2+1; j++) + ((int32_t*)(c->chrUPixBuf[i]))[j] = 1<<18; + } else + for(j=0; j<dst_stride+1; j++) + ((int16_t*)(c->chrUPixBuf[i]))[j] = 1<<14; + + av_assert0(c->chrDstH <= dstH); + + if (flags & SWS_PRINT_INFO) { + if (flags & SWS_FAST_BILINEAR) + av_log(c, AV_LOG_INFO, "FAST_BILINEAR scaler, "); + else if (flags & SWS_BILINEAR) + av_log(c, AV_LOG_INFO, "BILINEAR scaler, "); + else if (flags & SWS_BICUBIC) + av_log(c, AV_LOG_INFO, "BICUBIC scaler, "); + else if (flags & SWS_X) + av_log(c, AV_LOG_INFO, "Experimental scaler, "); + else if (flags & SWS_POINT) + av_log(c, AV_LOG_INFO, "Nearest Neighbor / POINT scaler, "); + else if (flags & SWS_AREA) + av_log(c, AV_LOG_INFO, "Area Averaging scaler, "); + else if (flags & SWS_BICUBLIN) + av_log(c, AV_LOG_INFO, "luma BICUBIC / chroma BILINEAR scaler, "); + else if (flags & SWS_GAUSS) + av_log(c, AV_LOG_INFO, "Gaussian scaler, "); + else if (flags & SWS_SINC) + av_log(c, AV_LOG_INFO, "Sinc scaler, "); + else if (flags & SWS_LANCZOS) + av_log(c, AV_LOG_INFO, "Lanczos scaler, "); + else if (flags & SWS_SPLINE) + av_log(c, AV_LOG_INFO, "Bicubic spline scaler, "); + else + av_log(c, AV_LOG_INFO, "ehh flags invalid?! "); + + av_log(c, AV_LOG_INFO, "from %s to %s%s ", + av_get_pix_fmt_name(srcFormat), +#ifdef DITHER1XBPP + dstFormat == AV_PIX_FMT_BGR555 || dstFormat == AV_PIX_FMT_BGR565 || + dstFormat == AV_PIX_FMT_RGB444BE || dstFormat == AV_PIX_FMT_RGB444LE || + dstFormat == AV_PIX_FMT_BGR444BE || dstFormat == AV_PIX_FMT_BGR444LE ? + "dithered " : "", +#else + "", +#endif + av_get_pix_fmt_name(dstFormat)); + + if (INLINE_MMXEXT(cpu_flags)) + av_log(c, AV_LOG_INFO, "using MMXEXT\n"); + else if (INLINE_AMD3DNOW(cpu_flags)) + av_log(c, AV_LOG_INFO, "using 3DNOW\n"); + else if (INLINE_MMX(cpu_flags)) + av_log(c, AV_LOG_INFO, "using MMX\n"); + else if (HAVE_ALTIVEC && cpu_flags & AV_CPU_FLAG_ALTIVEC) + av_log(c, AV_LOG_INFO, "using AltiVec\n"); + else + av_log(c, AV_LOG_INFO, "using C\n"); + + av_log(c, AV_LOG_VERBOSE, "%dx%d -> %dx%d\n", srcW, srcH, dstW, dstH); + av_log(c, AV_LOG_DEBUG, + "lum srcW=%d srcH=%d dstW=%d dstH=%d xInc=%d yInc=%d\n", + c->srcW, c->srcH, c->dstW, c->dstH, c->lumXInc, c->lumYInc); + av_log(c, AV_LOG_DEBUG, + "chr srcW=%d srcH=%d dstW=%d dstH=%d xInc=%d yInc=%d\n", + c->chrSrcW, c->chrSrcH, c->chrDstW, c->chrDstH, + c->chrXInc, c->chrYInc); + } + + c->swScale = ff_getSwsFunc(c); + return 0; +fail: // FIXME replace things by appropriate error codes + return -1; +} + +#if FF_API_SWS_GETCONTEXT +SwsContext *sws_getContext(int srcW, int srcH, enum AVPixelFormat srcFormat, + int dstW, int dstH, enum AVPixelFormat dstFormat, + int flags, SwsFilter *srcFilter, + SwsFilter *dstFilter, const double *param) +{ + SwsContext *c; + + if (!(c = sws_alloc_context())) + return NULL; + + c->flags = flags; + c->srcW = srcW; + c->srcH = srcH; + c->dstW = dstW; + c->dstH = dstH; + c->srcRange = handle_jpeg(&srcFormat); + c->dstRange = handle_jpeg(&dstFormat); + c->src0Alpha = handle_0alpha(&srcFormat); + c->dst0Alpha = handle_0alpha(&dstFormat); + c->srcFormat = srcFormat; + c->dstFormat = dstFormat; + + if (param) { + c->param[0] = param[0]; + c->param[1] = param[1]; + } + sws_setColorspaceDetails(c, ff_yuv2rgb_coeffs[SWS_CS_DEFAULT], c->srcRange, + ff_yuv2rgb_coeffs[SWS_CS_DEFAULT] /* FIXME*/, + c->dstRange, 0, 1 << 16, 1 << 16); + + if (sws_init_context(c, srcFilter, dstFilter) < 0) { + sws_freeContext(c); + return NULL; + } + + return c; +} +#endif + +SwsFilter *sws_getDefaultFilter(float lumaGBlur, float chromaGBlur, + float lumaSharpen, float chromaSharpen, + float chromaHShift, float chromaVShift, + int verbose) +{ + SwsFilter *filter = av_malloc(sizeof(SwsFilter)); + if (!filter) + return NULL; + + if (lumaGBlur != 0.0) { + filter->lumH = sws_getGaussianVec(lumaGBlur, 3.0); + filter->lumV = sws_getGaussianVec(lumaGBlur, 3.0); + } else { + filter->lumH = sws_getIdentityVec(); + filter->lumV = sws_getIdentityVec(); + } + + if (chromaGBlur != 0.0) { + filter->chrH = sws_getGaussianVec(chromaGBlur, 3.0); + filter->chrV = sws_getGaussianVec(chromaGBlur, 3.0); + } else { + filter->chrH = sws_getIdentityVec(); + filter->chrV = sws_getIdentityVec(); + } + + if (chromaSharpen != 0.0) { + SwsVector *id = sws_getIdentityVec(); + sws_scaleVec(filter->chrH, -chromaSharpen); + sws_scaleVec(filter->chrV, -chromaSharpen); + sws_addVec(filter->chrH, id); + sws_addVec(filter->chrV, id); + sws_freeVec(id); + } + + if (lumaSharpen != 0.0) { + SwsVector *id = sws_getIdentityVec(); + sws_scaleVec(filter->lumH, -lumaSharpen); + sws_scaleVec(filter->lumV, -lumaSharpen); + sws_addVec(filter->lumH, id); + sws_addVec(filter->lumV, id); + sws_freeVec(id); + } + + if (chromaHShift != 0.0) + sws_shiftVec(filter->chrH, (int)(chromaHShift + 0.5)); + + if (chromaVShift != 0.0) + sws_shiftVec(filter->chrV, (int)(chromaVShift + 0.5)); + + sws_normalizeVec(filter->chrH, 1.0); + sws_normalizeVec(filter->chrV, 1.0); + sws_normalizeVec(filter->lumH, 1.0); + sws_normalizeVec(filter->lumV, 1.0); + + if (verbose) + sws_printVec2(filter->chrH, NULL, AV_LOG_DEBUG); + if (verbose) + sws_printVec2(filter->lumH, NULL, AV_LOG_DEBUG); + + return filter; +} + +SwsVector *sws_allocVec(int length) +{ + SwsVector *vec; + + if(length <= 0 || length > INT_MAX/ sizeof(double)) + return NULL; + + vec = av_malloc(sizeof(SwsVector)); + if (!vec) + return NULL; + vec->length = length; + vec->coeff = av_malloc(sizeof(double) * length); + if (!vec->coeff) + av_freep(&vec); + return vec; +} + +SwsVector *sws_getGaussianVec(double variance, double quality) +{ + const int length = (int)(variance * quality + 0.5) | 1; + int i; + double middle = (length - 1) * 0.5; + SwsVector *vec; + + if(variance < 0 || quality < 0) + return NULL; + + vec = sws_allocVec(length); + + if (!vec) + return NULL; + + for (i = 0; i < length; i++) { + double dist = i - middle; + vec->coeff[i] = exp(-dist * dist / (2 * variance * variance)) / + sqrt(2 * variance * M_PI); + } + + sws_normalizeVec(vec, 1.0); + + return vec; +} + +SwsVector *sws_getConstVec(double c, int length) +{ + int i; + SwsVector *vec = sws_allocVec(length); + + if (!vec) + return NULL; + + for (i = 0; i < length; i++) + vec->coeff[i] = c; + + return vec; +} + +SwsVector *sws_getIdentityVec(void) +{ + return sws_getConstVec(1.0, 1); +} + +static double sws_dcVec(SwsVector *a) +{ + int i; + double sum = 0; + + for (i = 0; i < a->length; i++) + sum += a->coeff[i]; + + return sum; +} + +void sws_scaleVec(SwsVector *a, double scalar) +{ + int i; + + for (i = 0; i < a->length; i++) + a->coeff[i] *= scalar; +} + +void sws_normalizeVec(SwsVector *a, double height) +{ + sws_scaleVec(a, height / sws_dcVec(a)); +} + +static SwsVector *sws_getConvVec(SwsVector *a, SwsVector *b) +{ + int length = a->length + b->length - 1; + int i, j; + SwsVector *vec = sws_getConstVec(0.0, length); + + if (!vec) + return NULL; + + for (i = 0; i < a->length; i++) { + for (j = 0; j < b->length; j++) { + vec->coeff[i + j] += a->coeff[i] * b->coeff[j]; + } + } + + return vec; +} + +static SwsVector *sws_sumVec(SwsVector *a, SwsVector *b) +{ + int length = FFMAX(a->length, b->length); + int i; + SwsVector *vec = sws_getConstVec(0.0, length); + + if (!vec) + return NULL; + + for (i = 0; i < a->length; i++) + vec->coeff[i + (length - 1) / 2 - (a->length - 1) / 2] += a->coeff[i]; + for (i = 0; i < b->length; i++) + vec->coeff[i + (length - 1) / 2 - (b->length - 1) / 2] += b->coeff[i]; + + return vec; +} + +static SwsVector *sws_diffVec(SwsVector *a, SwsVector *b) +{ + int length = FFMAX(a->length, b->length); + int i; + SwsVector *vec = sws_getConstVec(0.0, length); + + if (!vec) + return NULL; + + for (i = 0; i < a->length; i++) + vec->coeff[i + (length - 1) / 2 - (a->length - 1) / 2] += a->coeff[i]; + for (i = 0; i < b->length; i++) + vec->coeff[i + (length - 1) / 2 - (b->length - 1) / 2] -= b->coeff[i]; + + return vec; +} + +/* shift left / or right if "shift" is negative */ +static SwsVector *sws_getShiftedVec(SwsVector *a, int shift) +{ + int length = a->length + FFABS(shift) * 2; + int i; + SwsVector *vec = sws_getConstVec(0.0, length); + + if (!vec) + return NULL; + + for (i = 0; i < a->length; i++) { + vec->coeff[i + (length - 1) / 2 - + (a->length - 1) / 2 - shift] = a->coeff[i]; + } + + return vec; +} + +void sws_shiftVec(SwsVector *a, int shift) +{ + SwsVector *shifted = sws_getShiftedVec(a, shift); + av_free(a->coeff); + a->coeff = shifted->coeff; + a->length = shifted->length; + av_free(shifted); +} + +void sws_addVec(SwsVector *a, SwsVector *b) +{ + SwsVector *sum = sws_sumVec(a, b); + av_free(a->coeff); + a->coeff = sum->coeff; + a->length = sum->length; + av_free(sum); +} + +void sws_subVec(SwsVector *a, SwsVector *b) +{ + SwsVector *diff = sws_diffVec(a, b); + av_free(a->coeff); + a->coeff = diff->coeff; + a->length = diff->length; + av_free(diff); +} + +void sws_convVec(SwsVector *a, SwsVector *b) +{ + SwsVector *conv = sws_getConvVec(a, b); + av_free(a->coeff); + a->coeff = conv->coeff; + a->length = conv->length; + av_free(conv); +} + +SwsVector *sws_cloneVec(SwsVector *a) +{ + int i; + SwsVector *vec = sws_allocVec(a->length); + + if (!vec) + return NULL; + + for (i = 0; i < a->length; i++) + vec->coeff[i] = a->coeff[i]; + + return vec; +} + +void sws_printVec2(SwsVector *a, AVClass *log_ctx, int log_level) +{ + int i; + double max = 0; + double min = 0; + double range; + + for (i = 0; i < a->length; i++) + if (a->coeff[i] > max) + max = a->coeff[i]; + + for (i = 0; i < a->length; i++) + if (a->coeff[i] < min) + min = a->coeff[i]; + + range = max - min; + + for (i = 0; i < a->length; i++) { + int x = (int)((a->coeff[i] - min) * 60.0 / range + 0.5); + av_log(log_ctx, log_level, "%1.3f ", a->coeff[i]); + for (; x > 0; x--) + av_log(log_ctx, log_level, " "); + av_log(log_ctx, log_level, "|\n"); + } +} + +void sws_freeVec(SwsVector *a) +{ + if (!a) + return; + av_freep(&a->coeff); + a->length = 0; + av_free(a); +} + +void sws_freeFilter(SwsFilter *filter) +{ + if (!filter) + return; + + if (filter->lumH) + sws_freeVec(filter->lumH); + if (filter->lumV) + sws_freeVec(filter->lumV); + if (filter->chrH) + sws_freeVec(filter->chrH); + if (filter->chrV) + sws_freeVec(filter->chrV); + av_free(filter); +} + +void sws_freeContext(SwsContext *c) +{ + int i; + if (!c) + return; + + if (c->lumPixBuf) { + for (i = 0; i < c->vLumBufSize; i++) + av_freep(&c->lumPixBuf[i]); + av_freep(&c->lumPixBuf); + } + + if (c->chrUPixBuf) { + for (i = 0; i < c->vChrBufSize; i++) + av_freep(&c->chrUPixBuf[i]); + av_freep(&c->chrUPixBuf); + av_freep(&c->chrVPixBuf); + } + + if (CONFIG_SWSCALE_ALPHA && c->alpPixBuf) { + for (i = 0; i < c->vLumBufSize; i++) + av_freep(&c->alpPixBuf[i]); + av_freep(&c->alpPixBuf); + } + + for (i = 0; i < 4; i++) + av_freep(&c->dither_error[i]); + + av_freep(&c->vLumFilter); + av_freep(&c->vChrFilter); + av_freep(&c->hLumFilter); + av_freep(&c->hChrFilter); +#if HAVE_ALTIVEC + av_freep(&c->vYCoeffsBank); + av_freep(&c->vCCoeffsBank); +#endif + + av_freep(&c->vLumFilterPos); + av_freep(&c->vChrFilterPos); + av_freep(&c->hLumFilterPos); + av_freep(&c->hChrFilterPos); + +#if HAVE_MMX_INLINE +#if USE_MMAP + if (c->lumMmxextFilterCode) + munmap(c->lumMmxextFilterCode, c->lumMmxextFilterCodeSize); + if (c->chrMmxextFilterCode) + munmap(c->chrMmxextFilterCode, c->chrMmxextFilterCodeSize); +#elif HAVE_VIRTUALALLOC + if (c->lumMmxextFilterCode) + VirtualFree(c->lumMmxextFilterCode, 0, MEM_RELEASE); + if (c->chrMmxextFilterCode) + VirtualFree(c->chrMmxextFilterCode, 0, MEM_RELEASE); +#else + av_free(c->lumMmxextFilterCode); + av_free(c->chrMmxextFilterCode); +#endif + c->lumMmxextFilterCode = NULL; + c->chrMmxextFilterCode = NULL; +#endif /* HAVE_MMX_INLINE */ + + av_freep(&c->yuvTable); + av_freep(&c->formatConvBuffer); + + av_free(c); +} + +struct SwsContext *sws_getCachedContext(struct SwsContext *context, int srcW, + int srcH, enum AVPixelFormat srcFormat, + int dstW, int dstH, + enum AVPixelFormat dstFormat, int flags, + SwsFilter *srcFilter, + SwsFilter *dstFilter, + const double *param) +{ + static const double default_param[2] = { SWS_PARAM_DEFAULT, + SWS_PARAM_DEFAULT }; + + if (!param) + param = default_param; + + if (context && + (context->srcW != srcW || + context->srcH != srcH || + context->srcFormat != srcFormat || + context->dstW != dstW || + context->dstH != dstH || + context->dstFormat != dstFormat || + context->flags != flags || + context->param[0] != param[0] || + context->param[1] != param[1])) { + sws_freeContext(context); + context = NULL; + } + + if (!context) { + if (!(context = sws_alloc_context())) + return NULL; + context->srcW = srcW; + context->srcH = srcH; + context->srcRange = handle_jpeg(&srcFormat); + context->src0Alpha = handle_0alpha(&srcFormat); + context->srcFormat = srcFormat; + context->dstW = dstW; + context->dstH = dstH; + context->dstRange = handle_jpeg(&dstFormat); + context->dst0Alpha = handle_0alpha(&dstFormat); + context->dstFormat = dstFormat; + context->flags = flags; + context->param[0] = param[0]; + context->param[1] = param[1]; + sws_setColorspaceDetails(context, ff_yuv2rgb_coeffs[SWS_CS_DEFAULT], + context->srcRange, + ff_yuv2rgb_coeffs[SWS_CS_DEFAULT] /* FIXME*/, + context->dstRange, 0, 1 << 16, 1 << 16); + if (sws_init_context(context, srcFilter, dstFilter) < 0) { + sws_freeContext(context); + return NULL; + } + } + return context; +} |