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ffmpeg / libswscale / swscale-test.c @ db46be01

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/*
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 * Copyright (C) 2003 Michael Niedermayer <michaelni@gmx.at>
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 *
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 * This file is part of Libav.
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 *
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 * Libav is free software; you can redistribute it and/or
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 * modify it under the terms of the GNU Lesser General Public
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 * License as published by the Free Software Foundation; either
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 * version 2.1 of the License, or (at your option) any later version.
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 *
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 * Libav is distributed in the hope that it will be useful,
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 * but WITHOUT ANY WARRANTY; without even the implied warranty of
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 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
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 * Lesser General Public License for more details.
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 *
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 * You should have received a copy of the GNU Lesser General Public
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 * License along with Libav; if not, write to the Free Software
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 * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA
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 */
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#include <stdio.h>
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#include <stdlib.h>
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#include <string.h>
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#include <inttypes.h>
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#include <stdarg.h>
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#undef HAVE_AV_CONFIG_H
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#include "libavutil/imgutils.h"
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#include "libavutil/mem.h"
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#include "libavutil/avutil.h"
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#include "libavutil/crc.h"
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#include "libavutil/pixdesc.h"
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#include "libavutil/lfg.h"
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#include "swscale.h"
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/* HACK Duplicated from swscale_internal.h.
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 * Should be removed when a cleaner pixel format system exists. */
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#define isGray(x)       (           \
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           (x)==PIX_FMT_GRAY8       \
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        || (x)==PIX_FMT_GRAY16BE    \
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        || (x)==PIX_FMT_GRAY16LE    \
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    )
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#define hasChroma(x)   (!(          \
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            isGray(x)               \
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        || (x)==PIX_FMT_MONOBLACK   \
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        || (x)==PIX_FMT_MONOWHITE   \
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    ))
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#define isALPHA(x)      (           \
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           (x)==PIX_FMT_BGR32       \
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        || (x)==PIX_FMT_BGR32_1     \
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        || (x)==PIX_FMT_RGB32       \
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        || (x)==PIX_FMT_RGB32_1     \
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        || (x)==PIX_FMT_YUVA420P    \
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    )
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static uint64_t getSSD(uint8_t *src1, uint8_t *src2, int stride1, int stride2, int w, int h)
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{
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    int x,y;
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    uint64_t ssd=0;
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//printf("%d %d\n", w, h);
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    for (y=0; y<h; y++) {
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        for (x=0; x<w; x++) {
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            int d= src1[x + y*stride1] - src2[x + y*stride2];
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            ssd+= d*d;
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//printf("%d", abs(src1[x + y*stride1] - src2[x + y*stride2])/26 );
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        }
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//printf("\n");
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    }
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    return ssd;
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}
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struct Results {
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    uint64_t ssdY;
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    uint64_t ssdU;
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    uint64_t ssdV;
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    uint64_t ssdA;
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    uint32_t crc;
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};
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// test by ref -> src -> dst -> out & compare out against ref
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// ref & out are YV12
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static int doTest(uint8_t *ref[4], int refStride[4], int w, int h,
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                  enum PixelFormat srcFormat, enum PixelFormat dstFormat,
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                  int srcW, int srcH, int dstW, int dstH, int flags,
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                  struct Results *r)
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{
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    static enum PixelFormat cur_srcFormat;
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    static int cur_srcW, cur_srcH;
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    static uint8_t *src[4];
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    static int srcStride[4];
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    uint8_t *dst[4] = {0};
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    uint8_t *out[4] = {0};
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    int dstStride[4];
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    int i;
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    uint64_t ssdY, ssdU=0, ssdV=0, ssdA=0;
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    struct SwsContext *dstContext = NULL, *outContext = NULL;
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    uint32_t crc = 0;
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    int res = 0;
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    if (cur_srcFormat != srcFormat || cur_srcW != srcW || cur_srcH != srcH) {
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        struct SwsContext *srcContext = NULL;
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        int p;
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        for (p = 0; p < 4; p++)
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            av_freep(&src[p]);
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        av_image_fill_linesizes(srcStride, srcFormat, srcW);
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        for (p = 0; p < 4; p++) {
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            if (srcStride[p])
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                src[p] = av_mallocz(srcStride[p]*srcH+16);
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            if (srcStride[p] && !src[p]) {
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                perror("Malloc");
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                res = -1;
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                goto end;
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            }
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        }
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        srcContext = sws_getContext(w, h, PIX_FMT_YUVA420P, srcW, srcH,
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                                    srcFormat, SWS_BILINEAR, NULL, NULL, NULL);
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        if (!srcContext) {
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            fprintf(stderr, "Failed to get %s ---> %s\n",
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                    av_pix_fmt_descriptors[PIX_FMT_YUVA420P].name,
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                    av_pix_fmt_descriptors[srcFormat].name);
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            res = -1;
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            goto end;
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        }
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        sws_scale(srcContext, ref, refStride, 0, h, src, srcStride);
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        sws_freeContext(srcContext);
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        cur_srcFormat = srcFormat;
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        cur_srcW = srcW;
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        cur_srcH = srcH;
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    }
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    av_image_fill_linesizes(dstStride, dstFormat, dstW);
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    for (i=0; i<4; i++) {
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        /* Image buffers passed into libswscale can be allocated any way you
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         * prefer, as long as they're aligned enough for the architecture, and
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         * they're freed appropriately (such as using av_free for buffers
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         * allocated with av_malloc). */
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        /* An extra 16 bytes is being allocated because some scalers may write
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         * out of bounds. */
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        if (dstStride[i])
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            dst[i]= av_mallocz(dstStride[i]*dstH+16);
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        if (dstStride[i] && !dst[i]) {
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            perror("Malloc");
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            res = -1;
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            goto end;
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        }
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    }
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    dstContext= sws_getContext(srcW, srcH, srcFormat, dstW, dstH, dstFormat, flags, NULL, NULL, NULL);
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    if (!dstContext) {
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        fprintf(stderr, "Failed to get %s ---> %s\n",
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                av_pix_fmt_descriptors[srcFormat].name,
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                av_pix_fmt_descriptors[dstFormat].name);
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        res = -1;
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        goto end;
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    }
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//    printf("test %X %X %X -> %X %X %X\n", (int)ref[0], (int)ref[1], (int)ref[2],
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//        (int)src[0], (int)src[1], (int)src[2]);
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    printf(" %s %dx%d -> %s %3dx%3d flags=%2d",
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           av_pix_fmt_descriptors[srcFormat].name, srcW, srcH,
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           av_pix_fmt_descriptors[dstFormat].name, dstW, dstH,
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           flags);
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    fflush(stdout);
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    sws_scale(dstContext, src, srcStride, 0, srcH, dst, dstStride);
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    for (i = 0; i < 4 && dstStride[i]; i++) {
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        crc = av_crc(av_crc_get_table(AV_CRC_32_IEEE), crc, dst[i], dstStride[i] * dstH);
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    }
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    if (r && crc == r->crc) {
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        ssdY = r->ssdY;
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        ssdU = r->ssdU;
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        ssdV = r->ssdV;
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        ssdA = r->ssdA;
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    } else {
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        for (i=0; i<4; i++) {
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            if (refStride[i])
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                out[i]= av_mallocz(refStride[i]*h);
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            if (refStride[i] && !out[i]) {
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                perror("Malloc");
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                res = -1;
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                goto end;
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            }
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        }
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        outContext= sws_getContext(dstW, dstH, dstFormat, w, h, PIX_FMT_YUVA420P, SWS_BILINEAR, NULL, NULL, NULL);
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        if (!outContext) {
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            fprintf(stderr, "Failed to get %s ---> %s\n",
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                    av_pix_fmt_descriptors[dstFormat].name,
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                    av_pix_fmt_descriptors[PIX_FMT_YUVA420P].name);
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            res = -1;
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            goto end;
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        }
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        sws_scale(outContext, dst, dstStride, 0, dstH, out, refStride);
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        ssdY= getSSD(ref[0], out[0], refStride[0], refStride[0], w, h);
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        if (hasChroma(srcFormat) && hasChroma(dstFormat)) {
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            //FIXME check that output is really gray
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            ssdU= getSSD(ref[1], out[1], refStride[1], refStride[1], (w+1)>>1, (h+1)>>1);
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            ssdV= getSSD(ref[2], out[2], refStride[2], refStride[2], (w+1)>>1, (h+1)>>1);
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        }
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        if (isALPHA(srcFormat) && isALPHA(dstFormat))
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            ssdA= getSSD(ref[3], out[3], refStride[3], refStride[3], w, h);
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        ssdY/= w*h;
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        ssdU/= w*h/4;
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        ssdV/= w*h/4;
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        ssdA/= w*h;
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        sws_freeContext(outContext);
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        for (i=0; i<4; i++) {
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            if (refStride[i])
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                av_free(out[i]);
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        }
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    }
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    printf(" CRC=%08x SSD=%5"PRId64",%5"PRId64",%5"PRId64",%5"PRId64"\n",
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           crc, ssdY, ssdU, ssdV, ssdA);
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end:
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    sws_freeContext(dstContext);
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236
    for (i=0; i<4; i++) {
237
        if (dstStride[i])
238
            av_free(dst[i]);
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    }
240

    
241
    return res;
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}
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244
static void selfTest(uint8_t *ref[4], int refStride[4], int w, int h,
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                     enum PixelFormat srcFormat_in,
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                     enum PixelFormat dstFormat_in)
247
{
248
    const int flags[] = { SWS_FAST_BILINEAR,
249
                          SWS_BILINEAR, SWS_BICUBIC,
250
                          SWS_X       , SWS_POINT  , SWS_AREA, 0 };
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    const int srcW = w;
252
    const int srcH = h;
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    const int dstW[] = { srcW - srcW/3, srcW, srcW + srcW/3, 0 };
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    const int dstH[] = { srcH - srcH/3, srcH, srcH + srcH/3, 0 };
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    enum PixelFormat srcFormat, dstFormat;
256

    
257
    for (srcFormat = srcFormat_in != PIX_FMT_NONE ? srcFormat_in : 0;
258
         srcFormat < PIX_FMT_NB; srcFormat++) {
259
        if (!sws_isSupportedInput(srcFormat) || !sws_isSupportedOutput(srcFormat))
260
            continue;
261

    
262
        for (dstFormat = dstFormat_in != PIX_FMT_NONE ? dstFormat_in : 0;
263
             dstFormat < PIX_FMT_NB; dstFormat++) {
264
            int i, j, k;
265
            int res = 0;
266

    
267
            if (!sws_isSupportedInput(dstFormat) || !sws_isSupportedOutput(dstFormat))
268
                continue;
269

    
270
            printf("%s -> %s\n",
271
                   av_pix_fmt_descriptors[srcFormat].name,
272
                   av_pix_fmt_descriptors[dstFormat].name);
273
            fflush(stdout);
274

    
275
            for (k = 0; flags[k] && !res; k++) {
276
                for (i = 0; dstW[i] && !res; i++)
277
                    for (j = 0; dstH[j] && !res; j++)
278
                        res = doTest(ref, refStride, w, h,
279
                                     srcFormat, dstFormat,
280
                                     srcW, srcH, dstW[i], dstH[j], flags[k],
281
                                     NULL);
282
            }
283
            if (dstFormat_in != PIX_FMT_NONE)
284
                break;
285
        }
286
        if (srcFormat_in != PIX_FMT_NONE)
287
            break;
288
    }
289
}
290

    
291
static int fileTest(uint8_t *ref[4], int refStride[4], int w, int h, FILE *fp,
292
                    enum PixelFormat srcFormat_in,
293
                    enum PixelFormat dstFormat_in)
294
{
295
    char buf[256];
296

    
297
    while (fgets(buf, sizeof(buf), fp)) {
298
        struct Results r;
299
        enum PixelFormat srcFormat;
300
        char srcStr[12];
301
        int srcW, srcH;
302
        enum PixelFormat dstFormat;
303
        char dstStr[12];
304
        int dstW, dstH;
305
        int flags;
306
        int ret;
307

    
308
        ret = sscanf(buf, " %12s %dx%d -> %12s %dx%d flags=%d CRC=%x"
309
                          " SSD=%"PRId64", %"PRId64", %"PRId64", %"PRId64"\n",
310
                          srcStr, &srcW, &srcH, dstStr, &dstW, &dstH,
311
                          &flags, &r.crc, &r.ssdY, &r.ssdU, &r.ssdV, &r.ssdA);
312
        if (ret != 12) {
313
            srcStr[0] = dstStr[0] = 0;
314
            ret = sscanf(buf, "%12s -> %12s\n", srcStr, dstStr);
315
        }
316

    
317
        srcFormat = av_get_pix_fmt(srcStr);
318
        dstFormat = av_get_pix_fmt(dstStr);
319

    
320
        if (srcFormat == PIX_FMT_NONE || dstFormat == PIX_FMT_NONE) {
321
            fprintf(stderr, "malformed input file\n");
322
            return -1;
323
        }
324
        if ((srcFormat_in != PIX_FMT_NONE && srcFormat_in != srcFormat) ||
325
            (dstFormat_in != PIX_FMT_NONE && dstFormat_in != dstFormat))
326
            continue;
327
        if (ret != 12) {
328
            printf("%s", buf);
329
            continue;
330
        }
331

    
332
        doTest(ref, refStride, w, h,
333
               srcFormat, dstFormat,
334
               srcW, srcH, dstW, dstH, flags,
335
               &r);
336
    }
337

    
338
    return 0;
339
}
340

    
341
#define W 96
342
#define H 96
343

    
344
int main(int argc, char **argv)
345
{
346
    enum PixelFormat srcFormat = PIX_FMT_NONE;
347
    enum PixelFormat dstFormat = PIX_FMT_NONE;
348
    uint8_t *rgb_data = av_malloc (W*H*4);
349
    uint8_t *rgb_src[3]= {rgb_data, NULL, NULL};
350
    int rgb_stride[3]={4*W, 0, 0};
351
    uint8_t *data = av_malloc (4*W*H);
352
    uint8_t *src[4]= {data, data+W*H, data+W*H*2, data+W*H*3};
353
    int stride[4]={W, W, W, W};
354
    int x, y;
355
    struct SwsContext *sws;
356
    AVLFG rand;
357
    int res = -1;
358
    int i;
359

    
360
    if (!rgb_data || !data)
361
        return -1;
362

    
363
    sws= sws_getContext(W/12, H/12, PIX_FMT_RGB32, W, H, PIX_FMT_YUVA420P, SWS_BILINEAR, NULL, NULL, NULL);
364

    
365
    av_lfg_init(&rand, 1);
366

    
367
    for (y=0; y<H; y++) {
368
        for (x=0; x<W*4; x++) {
369
            rgb_data[ x + y*4*W]= av_lfg_get(&rand);
370
        }
371
    }
372
    sws_scale(sws, rgb_src, rgb_stride, 0, H, src, stride);
373
    sws_freeContext(sws);
374
    av_free(rgb_data);
375

    
376
    for (i = 1; i < argc; i += 2) {
377
        if (argv[i][0] != '-' || i+1 == argc)
378
            goto bad_option;
379
        if (!strcmp(argv[i], "-ref")) {
380
            FILE *fp = fopen(argv[i+1], "r");
381
            if (!fp) {
382
                fprintf(stderr, "could not open '%s'\n", argv[i+1]);
383
                goto error;
384
            }
385
            res = fileTest(src, stride, W, H, fp, srcFormat, dstFormat);
386
            fclose(fp);
387
            goto end;
388
        } else if (!strcmp(argv[i], "-src")) {
389
            srcFormat = av_get_pix_fmt(argv[i+1]);
390
            if (srcFormat == PIX_FMT_NONE) {
391
                fprintf(stderr, "invalid pixel format %s\n", argv[i+1]);
392
                return -1;
393
            }
394
        } else if (!strcmp(argv[i], "-dst")) {
395
            dstFormat = av_get_pix_fmt(argv[i+1]);
396
            if (dstFormat == PIX_FMT_NONE) {
397
                fprintf(stderr, "invalid pixel format %s\n", argv[i+1]);
398
                return -1;
399
            }
400
        } else {
401
bad_option:
402
            fprintf(stderr, "bad option or argument missing (%s)\n", argv[i]);
403
            goto error;
404
        }
405
    }
406

    
407
    selfTest(src, stride, W, H, srcFormat, dstFormat);
408
end:
409
    res = 0;
410
error:
411
    av_free(data);
412

    
413
    return res;
414
}