PeerStreamer

/*

 * Copyright (C) 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 <stdio.h>

#include <stdlib.h>

#include <string.h>

#include <inttypes.h>

#include <stdarg.h>

#undef HAVE_AV_CONFIG_H

#include "libavutil/avutil.h"

#include "libavutil/lfg.h"

#include "swscale.h"

#include "swscale_internal.h"

static uint64_t getSSD(uint8_t *src1, uint8_t *src2, int stride1, int stride2, int w, int h){

    int x,y;

    uint64_t ssd=0;

//printf("%d %d\n", w, h);

    for (y=0; y<h; y++){

        for (x=0; x<w; x++){

            int d= src1[x + y*stride1] - src2[x + y*stride2];

            ssd+= d*d;

//printf("%d", abs(src1[x + y*stride1] - src2[x + y*stride2])/26 );

        }

//printf("\n");

    }

    return ssd;

}

// test by ref -> src -> dst -> out & compare out against ref

// ref & out are YV12

static int doTest(uint8_t *ref[4], int refStride[4], int w, int h, int srcFormat, int dstFormat,

                  int srcW, int srcH, int dstW, int dstH, int flags){

    uint8_t *src[4] = {0};

    uint8_t *dst[4] = {0};

    uint8_t *out[4] = {0};

    int srcStride[4], dstStride[4];

    int i;

    uint64_t ssdY, ssdU, ssdV, ssdA=0;

    struct SwsContext *srcContext = NULL, *dstContext = NULL,

                      *outContext = NULL;

    int res;

    res = 0;

    for (i=0; i<4; i++){

        // avoid stride % bpp != 0

        if (srcFormat==PIX_FMT_RGB24 || srcFormat==PIX_FMT_BGR24)

            srcStride[i]= srcW*3;

        else if (srcFormat==PIX_FMT_RGB48BE || srcFormat==PIX_FMT_RGB48LE)

            srcStride[i]= srcW*6;

        else

            srcStride[i]= srcW*4;

        if (dstFormat==PIX_FMT_RGB24 || dstFormat==PIX_FMT_BGR24)

            dstStride[i]= dstW*3;

        else if (dstFormat==PIX_FMT_RGB48BE || dstFormat==PIX_FMT_RGB48LE)

            dstStride[i]= dstW*6;

        else

            dstStride[i]= dstW*4;

        src[i]= (uint8_t*) malloc(srcStride[i]*srcH);

        dst[i]= (uint8_t*) malloc(dstStride[i]*dstH);

        out[i]= (uint8_t*) malloc(refStride[i]*h);

        if (!src[i] || !dst[i] || !out[i]) {

            perror("Malloc");

            res = -1;

            goto end;

        }

    }

    srcContext= sws_getContext(w, h, PIX_FMT_YUVA420P, srcW, srcH, srcFormat, flags, NULL, NULL, NULL);

    if (!srcContext) {

        fprintf(stderr, "Failed to get %s ---> %s\n",

                sws_format_name(PIX_FMT_YUVA420P),

                sws_format_name(srcFormat));

        res = -1;

        goto end;

    }

    dstContext= sws_getContext(srcW, srcH, srcFormat, dstW, dstH, dstFormat, flags, NULL, NULL, NULL);

    if (!dstContext) {

        fprintf(stderr, "Failed to get %s ---> %s\n",

                sws_format_name(srcFormat),

                sws_format_name(dstFormat));

        res = -1;

        goto end;

    }

    outContext= sws_getContext(dstW, dstH, dstFormat, w, h, PIX_FMT_YUVA420P, flags, NULL, NULL, NULL);

    if (!outContext) {

        fprintf(stderr, "Failed to get %s ---> %s\n",

                sws_format_name(dstFormat),

                sws_format_name(PIX_FMT_YUVA420P));

        res = -1;

        goto end;

    }

//    printf("test %X %X %X -> %X %X %X\n", (int)ref[0], (int)ref[1], (int)ref[2],

//        (int)src[0], (int)src[1], (int)src[2]);

    sws_scale(srcContext, ref, refStride, 0, h   , src, srcStride);

    sws_scale(dstContext, src, srcStride, 0, srcH, dst, dstStride);

    sws_scale(outContext, dst, dstStride, 0, dstH, out, refStride);

    ssdY= getSSD(ref[0], out[0], refStride[0], refStride[0], w, h);

    ssdU= getSSD(ref[1], out[1], refStride[1], refStride[1], (w+1)>>1, (h+1)>>1);

    ssdV= getSSD(ref[2], out[2], refStride[2], refStride[2], (w+1)>>1, (h+1)>>1);

    if (isALPHA(srcFormat) && isALPHA(dstFormat))

        ssdA= getSSD(ref[3], out[3], refStride[3], refStride[3], w, h);

    if (srcFormat == PIX_FMT_GRAY8 || dstFormat==PIX_FMT_GRAY8) ssdU=ssdV=0; //FIXME check that output is really gray

    ssdY/= w*h;

    ssdU/= w*h/4;

    ssdV/= w*h/4;

    ssdA/= w*h;

    printf(" %s %dx%d -> %s %4dx%4d flags=%2d SSD=%5"PRId64",%5"PRId64",%5"PRId64",%5"PRId64"\n",

           sws_format_name(srcFormat), srcW, srcH,

           sws_format_name(dstFormat), dstW, dstH,

           flags, ssdY, ssdU, ssdV, ssdA);

    fflush(stdout);

    end:

    sws_freeContext(srcContext);

    sws_freeContext(dstContext);

    sws_freeContext(outContext);

    for (i=0; i<4; i++){

        free(src[i]);

        free(dst[i]);

        free(out[i]);

    }

    return res;

}

static void selfTest(uint8_t *src[4], int stride[4], int w, int h){

    enum PixelFormat srcFormat, dstFormat;

    int srcW, srcH, dstW, dstH;

    int flags;

    for (srcFormat = 0; srcFormat < PIX_FMT_NB; srcFormat++) {

        for (dstFormat = 0; dstFormat < PIX_FMT_NB; dstFormat++) {

            printf("%s -> %s\n",

                   sws_format_name(srcFormat),

                   sws_format_name(dstFormat));

            fflush(stdout);

            srcW= w;

            srcH= h;

            for (dstW=w - w/3; dstW<= 4*w/3; dstW+= w/3){

                for (dstH=h - h/3; dstH<= 4*h/3; dstH+= h/3){

                    for (flags=1; flags<33; flags*=2) {

                        int res;

                        res = doTest(src, stride, w, h, srcFormat, dstFormat,

                                     srcW, srcH, dstW, dstH, flags);

                        if (res < 0) {

                            dstW = 4 * w / 3;

                            dstH = 4 * h / 3;

                            flags = 33;

                        }

                    }

                }

            }

        }

    }

}

#define W 96

#define H 96

int main(int argc, char **argv){

    uint8_t *rgb_data = malloc (W*H*4);

    uint8_t *rgb_src[3]= {rgb_data, NULL, NULL};

    int rgb_stride[3]={4*W, 0, 0};

    uint8_t *data = malloc (4*W*H);

    uint8_t *src[4]= {data, data+W*H, data+W*H*2, data+W*H*3};

    int stride[4]={W, W, W, W};

    int x, y;

    struct SwsContext *sws;

    AVLFG rand;

    sws= sws_getContext(W/12, H/12, PIX_FMT_RGB32, W, H, PIX_FMT_YUVA420P, 2, NULL, NULL, NULL);

    av_lfg_init(&rand, 1);

    for (y=0; y<H; y++){

        for (x=0; x<W*4; x++){

            rgb_data[ x + y*4*W]= av_lfg_get(&rand);

        }

    }

    sws_scale(sws, rgb_src, rgb_stride, 0, H, src, stride);

    selfTest(src, stride, W, H);

    return 123;

}