Rename swscale-example to swscale-test, to better reflect the intended

use of the program.

Originally committed as revision 30439 to svn://svn.mplayerhq.hu/mplayer/trunk/libswscale

1 files changed, 260 insertions, 0 deletions

diff --git a/libswscale/swscale-test.c b/libswscale/swscale-test.c
new file mode 100644
index 0000000000..a812ee5963
--- /dev/null
+++ b/libswscale/swscale-test.c
@@ -0,0 +1,260 @@
+/*
+ * 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/mem.h"
+#include "libavutil/avutil.h"
+#include "libavutil/lfg.h"
+#include "swscale.h"
+
+/* HACK Duplicated from swscale_internal.h.
+ * Should be removed when a cleaner pixel format system exists. */
+const char *sws_format_name(enum PixelFormat format);
+#define isGray(x)       (           \
+           (x)==PIX_FMT_GRAY8       \
+        || (x)==PIX_FMT_GRAY16BE    \
+        || (x)==PIX_FMT_GRAY16LE    \
+    )
+#define hasChroma(x)   (!(          \
+            isGray(x)               \
+        || (x)==PIX_FMT_MONOBLACK   \
+        || (x)==PIX_FMT_MONOWHITE   \
+    ))
+#define isALPHA(x)      (           \
+           (x)==PIX_FMT_BGR32       \
+        || (x)==PIX_FMT_BGR32_1     \
+        || (x)==PIX_FMT_RGB32       \
+        || (x)==PIX_FMT_RGB32_1     \
+        || (x)==PIX_FMT_YUVA420P    \
+    )
+
+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,
+                  enum PixelFormat srcFormat, enum PixelFormat 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=0, ssdV=0, 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;
+
+        /* Image buffers passed into libswscale can be allocated any way you
+         * prefer, as long as they're aligned enough for the architecture, and
+         * they're freed appropriately (such as using av_free for buffers
+         * allocated with av_malloc). */
+        src[i]= av_malloc(srcStride[i]*srcH);
+        dst[i]= av_malloc(dstStride[i]*dstH);
+        out[i]= av_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);
+    if (hasChroma(srcFormat) && hasChroma(dstFormat)) {
+        //FIXME check that output is really gray
+        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);
+
+    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++) {
+        av_free(src[i]);
+        av_free(dst[i]);
+        av_free(out[i]);
+    }
+
+    return res;
+}
+
+static void selfTest(uint8_t *ref[4], int refStride[4], int w, int h)
+{
+    const int flags[] = { SWS_FAST_BILINEAR,
+                          SWS_BILINEAR, SWS_BICUBIC,
+                          SWS_X       , SWS_POINT  , SWS_AREA, 0 };
+    const int srcW = w;
+    const int srcH = h;
+    const int dstW[] = { srcW - srcW/3, srcW, srcW + srcW/3, 0 };
+    const int dstH[] = { srcH - srcH/3, srcH, srcH + srcH/3, 0 };
+    enum PixelFormat srcFormat, dstFormat;
+
+    for (srcFormat = 0; srcFormat < PIX_FMT_NB; srcFormat++) {
+        if (!sws_isSupportedInput(srcFormat) || !sws_isSupportedOutput(srcFormat))
+            continue;
+
+        for (dstFormat = 0; dstFormat < PIX_FMT_NB; dstFormat++) {
+            int i, j, k;
+            int res = 0;
+
+            if (!sws_isSupportedInput(dstFormat) || !sws_isSupportedOutput(dstFormat))
+                continue;
+
+            printf("%s -> %s\n",
+                   sws_format_name(srcFormat),
+                   sws_format_name(dstFormat));
+            fflush(stdout);
+
+            for (i = 0; dstW[i] && !res; i++)
+                for (j = 0; dstH[j] && !res; j++)
+                    for (k = 0; flags[k] && !res; k++)
+                        res = doTest(ref, refStride, w, h, srcFormat, dstFormat,
+                                     srcW, srcH, dstW[i], dstH[j], flags[k]);
+        }
+    }
+}
+
+#define W 96
+#define H 96
+
+int main(int argc, char **argv)
+{
+    uint8_t *rgb_data = av_malloc (W*H*4);
+    uint8_t *rgb_src[3]= {rgb_data, NULL, NULL};
+    int rgb_stride[3]={4*W, 0, 0};
+    uint8_t *data = av_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;
+
+    if (!rgb_data || !data)
+        return -1;
+
+    sws= sws_getContext(W/12, H/12, PIX_FMT_RGB32, W, H, PIX_FMT_YUVA420P, SWS_BILINEAR, 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);
+    sws_freeContext(sws);
+    av_free(rgb_data);
+
+    selfTest(src, stride, W, H);
+    av_free(data);
+
+    return 0;
+}