added first version of regression tests - simply type 'make test' to test every codec and some mux/demuxes - added simple synthetic audio and video bitstreams generators so that no big streams needs to be used

Originally committed as revision 532 to svn://svn.ffmpeg.org/ffmpeg/trunk

5 files changed, 646 insertions, 0 deletions

diff --git a/tests/Makefile b/tests/Makefile
new file mode 100644
index 0000000000..3a7bec0070
--- /dev/null
+++ b/tests/Makefile
@@ -0,0 +1,40 @@
+#
+# Makefile for tests
+# (c) 2002 Gerard Lantau
+#
+include ../config.mak
+
+VPATH=$(SRC_PATH)/tests
+CFLAGS=-O2 -Wall -g
+REFFILE=$(SRC_PATH)/tests/ffmpeg.regression.ref
+
+all: test
+
+# fast regression tests for all codecs
+test mpeg4 mpeg: vsynth1/0.pgm asynth1.sw
+	@$(SRC_PATH)/tests/regression.sh $@ $(REFFILE)
+
+# update the regression test with the current results
+updatetest:
+	cp /tmp/ffmpeg.regression $(REFFILE)
+
+# video generation 
+
+vsynth1/0.pgm: videogen
+	@mkdir -p vsynth1
+	./videogen 'vsynth1/'
+
+videogen: videogen.c
+	$(CC) $(LDFLAGS) $(CFLAGS) -o $@ $<
+
+# audio generation
+
+asynth1.sw: audiogen
+	./audiogen $@
+
+audiogen: audiogen.c
+	$(CC) $(LDFLAGS) $(CFLAGS) -o $@ $<
+
+clean:
+	rm -rf vsynth1
+	rm -f asynth1.sw *~ audiogen videogen
diff --git a/tests/audiogen.c b/tests/audiogen.c
new file mode 100644
index 0000000000..4913a6ced8
--- /dev/null
+++ b/tests/audiogen.c
@@ -0,0 +1,168 @@
+/*
+ * Generates a synthetic stereo sound
+ * NOTE: no floats are used to guaranty a bit exact output.
+ */
+#include <stdlib.h>
+#include <stdio.h>
+
+#define NB_CHANNELS 2
+#define FE 44100
+
+static unsigned int myrnd(unsigned int *seed_ptr, int n)
+{
+    unsigned int seed, val;
+
+    seed = *seed_ptr;
+    seed = (seed * 314159) + 1;
+    if (n == 256) {
+        val = seed >> 24;
+    } else {
+        val = seed % n;
+    }
+    *seed_ptr = seed;
+    return val;
+}
+
+#define FRAC_BITS 16
+#define FRAC_ONE (1 << FRAC_BITS)
+
+#define COS_TABLE_BITS 7
+
+/* integer cosinus */
+static const unsigned short cos_table[(1 << COS_TABLE_BITS) + 2] = {
+ 0x8000, 0x7ffe, 0x7ff6, 0x7fea, 0x7fd9, 0x7fc2, 0x7fa7, 0x7f87,
+ 0x7f62, 0x7f38, 0x7f0a, 0x7ed6, 0x7e9d, 0x7e60, 0x7e1e, 0x7dd6,
+ 0x7d8a, 0x7d3a, 0x7ce4, 0x7c89, 0x7c2a, 0x7bc6, 0x7b5d, 0x7aef,
+ 0x7a7d, 0x7a06, 0x798a, 0x790a, 0x7885, 0x77fb, 0x776c, 0x76d9,
+ 0x7642, 0x75a6, 0x7505, 0x7460, 0x73b6, 0x7308, 0x7255, 0x719e,
+ 0x70e3, 0x7023, 0x6f5f, 0x6e97, 0x6dca, 0x6cf9, 0x6c24, 0x6b4b,
+ 0x6a6e, 0x698c, 0x68a7, 0x67bd, 0x66d0, 0x65de, 0x64e9, 0x63ef,
+ 0x62f2, 0x61f1, 0x60ec, 0x5fe4, 0x5ed7, 0x5dc8, 0x5cb4, 0x5b9d,
+ 0x5a82, 0x5964, 0x5843, 0x571e, 0x55f6, 0x54ca, 0x539b, 0x5269,
+ 0x5134, 0x4ffb, 0x4ec0, 0x4d81, 0x4c40, 0x4afb, 0x49b4, 0x486a,
+ 0x471d, 0x45cd, 0x447b, 0x4326, 0x41ce, 0x4074, 0x3f17, 0x3db8,
+ 0x3c57, 0x3af3, 0x398d, 0x3825, 0x36ba, 0x354e, 0x33df, 0x326e,
+ 0x30fc, 0x2f87, 0x2e11, 0x2c99, 0x2b1f, 0x29a4, 0x2827, 0x26a8,
+ 0x2528, 0x23a7, 0x2224, 0x209f, 0x1f1a, 0x1d93, 0x1c0c, 0x1a83,
+ 0x18f9, 0x176e, 0x15e2, 0x1455, 0x12c8, 0x113a, 0x0fab, 0x0e1c,
+ 0x0c8c, 0x0afb, 0x096b, 0x07d9, 0x0648, 0x04b6, 0x0324, 0x0192,
+ 0x0000, 0x0000,
+};
+
+#define CSHIFT (FRAC_BITS - COS_TABLE_BITS - 2)
+
+static int int_cos(int a)
+{
+    int neg, v, f;
+    const unsigned short *p;
+
+    a = a & (FRAC_ONE - 1); /* modulo 2 * pi */
+    if (a >= (FRAC_ONE / 2))
+        a = FRAC_ONE - a;
+    neg = 0;
+    if (a > (FRAC_ONE / 4)) {
+        neg = -1;
+        a = (FRAC_ONE / 2) - a;
+    }
+    p = cos_table + (a >> CSHIFT);
+    /* linear interpolation */
+    f = a & ((1 << CSHIFT) - 1);
+    v = p[0] + (((p[1] - p[0]) * f + (1 << (CSHIFT - 1))) >> CSHIFT);
+    v = (v ^ neg) - neg;
+    v = v << (FRAC_BITS - 15);
+    return v;
+}
+
+FILE *outfile;
+
+void put_sample(int v)
+{
+    fputc(v & 0xff, outfile);
+    fputc((v >> 8) & 0xff, outfile);
+}
+
+int main(int argc, char **argv)
+{
+    int i, a, v, j, f, amp, ampa;
+    unsigned int seed = 1;
+    int tabf1[NB_CHANNELS], tabf2[NB_CHANNELS];
+    int taba[NB_CHANNELS];
+
+    if (argc != 2) {
+        printf("usage: %s file\n"
+               "generate a test raw 16 bit stereo audio stream\n", argv[0]);
+        exit(1);
+    }
+    
+    outfile = fopen(argv[1], "w");
+    if (!outfile) {
+        perror(argv[1]);
+        return 1;
+    }
+
+    /* 1 second of single freq sinus at 1000 Hz */
+    a = 0;
+    for(i=0;i<1 * FE;i++) {
+        v = (int_cos(a) * 10000) >> FRAC_BITS;
+        for(j=0;j<NB_CHANNELS;j++)
+            put_sample(v);
+        a += (1000 * FRAC_ONE) / FE;
+    }
+
+    /* 1 second of varing frequency between 100 and 10000 Hz */
+    a = 0;
+    for(i=0;i<1 * FE;i++) {
+        v = (int_cos(a) * 10000) >> FRAC_BITS;
+        for(j=0;j<NB_CHANNELS;j++)
+            put_sample(v);
+        f = 100 + (((10000 - 100) * i) / FE);
+        a += (f * FRAC_ONE) / FE;
+    }
+    
+    /* 0.5 second of low amplitude white noise */
+    for(i=0;i<FE / 2;i++) {
+        v = myrnd(&seed, 20000) - 10000;
+        for(j=0;j<NB_CHANNELS;j++)
+            put_sample(v);
+    }
+
+    /* 0.5 second of high amplitude white noise */
+    for(i=0;i<FE / 2;i++) {
+        v = myrnd(&seed, 65535) - 32768;
+        for(j=0;j<NB_CHANNELS;j++)
+            put_sample(v);
+    }
+
+    /* stereo : 2 unrelated ramps */
+    for(j=0;j<NB_CHANNELS;j++) {
+        taba[j] = 0;
+        tabf1[j] = 100 + myrnd(&seed, 5000);
+        tabf2[j] = 100 + myrnd(&seed, 5000);
+    }
+    for(i=0;i<1 * FE;i++) {
+        for(j=0;j<NB_CHANNELS;j++) {
+            v = (int_cos(taba[j]) * 10000) >> FRAC_BITS;
+            put_sample(v);
+            f = tabf1[j] + (((tabf2[j] - tabf1[j]) * i) / FE);
+            taba[j] += (f * FRAC_ONE) / FE;
+        }
+    }
+    
+    /* stereo 500 Hz with varying volume */
+    a = 0;
+    ampa = 0;
+    for(i=0;i<2 * FE;i++) {
+        for(j=0;j<NB_CHANNELS;j++) {
+            amp = ((FRAC_ONE + int_cos(ampa)) * 5000) >> FRAC_BITS;
+            if (j & 1)
+                amp = 10000 - amp;
+            v = (int_cos(a) * amp) >> FRAC_BITS;
+            put_sample(v);
+            a += (500 * FRAC_ONE) / FE;
+            ampa += (2 * FRAC_ONE) / FE;
+        }
+    }
+
+    fclose(outfile);
+    return 0;
+}
diff --git a/tests/ffmpeg.regression.ref b/tests/ffmpeg.regression.ref
new file mode 100644
index 0000000000..d5b1669b8a
--- /dev/null
+++ b/tests/ffmpeg.regression.ref
@@ -0,0 +1,15 @@
+ffmpeg regression test
+5f79a1de94818e085d283612c979209e  /tmp/a-mpeg1.mpg
+ec8038d872249d000ef3ced8a929d852  /tmp/out.yuv
+0d2929a5ca7d59404ae302ceaef34ad0  /tmp/a-msmpeg4.avi
+78f75bae681ad659d8433be5c5be4355  /tmp/out.yuv
+dbdfcaec083cb2ff9484369d51b5dd37  /tmp/a-h263.avi
+dd556b4cab001f91594ed5198c0076e9  /tmp/out.yuv
+fa29e99ad3314a5ef6881f3fcad374e7  /tmp/a-odivx.avi
+42d47bf027f72cba83ea23b9755937bd  /tmp/out.yuv
+ff06a0b59e445d2694185a08e1000801  /tmp/a-mjpeg.avi
+6551ec4dea416fa3e8f3538d206f236f  /tmp/out.yuv
+21f8ff9f1daacd9133683bb4ea0f50a4  /tmp/a-mp2.mp2
+66ba0fcbf3ed6310d54a71611e16a59c  /tmp/out.wav
+048b9c3444c788bac6ce5cc3a8f4db00  /tmp/a-ac3.rm
+ae59a9cf43ee96b3214567ce8a25aa31  /tmp/out.wav
diff --git a/tests/regression.sh b/tests/regression.sh
new file mode 100755
index 0000000000..187aa10b1f
--- /dev/null
+++ b/tests/regression.sh
@@ -0,0 +1,145 @@
+#!/bin/sh
+#
+# automatic regression test for ffmpeg
+#
+#
+#set -x
+set -e
+
+# tests to do
+if [ "$1" = "mpeg4" ] ; then
+    do_mpeg4=y
+elif [ "$1" = "mpeg" ] ; then
+    do_mpeg=y
+else
+    do_mpeg=y
+    do_msmpeg4=y
+    do_h263=y
+    do_mpeg4=y
+    do_mjpeg=y
+    #do_rv10=y #broken!
+    do_mp2=y
+    do_ac3=y
+fi
+
+
+# various files
+ffmpeg="../ffmpeg"
+outfile="/tmp/a-"
+reffile="$2"
+logfile="/tmp/ffmpeg.regression"
+benchfile="/tmp/ffmpeg.bench"
+raw_src="vsynth1/%d.pgm"
+raw_dst="/tmp/out.yuv"
+pcm_src="asynth1.sw"
+pcm_dst="/tmp/out.wav"
+
+function do_ffmpeg ()
+{
+    f="$1"
+    shift
+    echo $ffmpeg $*
+    $ffmpeg -benchmark $* > /tmp/bench.tmp
+    md5sum $f >> $logfile
+    expr match "`cat /tmp/bench.tmp`" '.*utime=\(.*s\)' > /tmp/bench2.tmp
+    echo `cat /tmp/bench2.tmp` $f >> $benchfile
+}
+
+
+echo "ffmpeg regression test" > $logfile
+echo "ffmpeg benchmarks" > $benchfile
+
+###################################
+if [ -n "$do_mpeg" ] ; then
+# mpeg1 encoding
+file=${outfile}mpeg1.mpg
+do_ffmpeg $file -y -qscale 10 -f pgmyuv -i $raw_src -f mpegvideo $file 
+
+# mpeg1 decoding
+do_ffmpeg $raw_dst -y -f mpegvideo -i $file -f rawvideo $raw_dst
+
+# mpeg2 decoding
+#do_ffmpeg /tmp/out-mpeg2.yuv -y -f mpegvideo -i a.vob \
+#          -f rawvideo /tmp/out-mpeg2.yuv
+fi
+
+###################################
+if [ -n "$do_msmpeg4" ] ; then
+# msmpeg4 encoding
+file=${outfile}msmpeg4.avi
+do_ffmpeg $file -y -qscale 10 -f pgmyuv -i $raw_src -an -vcodec msmpeg4 $file
+
+# msmpeg4 decoding
+do_ffmpeg $raw_dst -y -i $file -f rawvideo $raw_dst 
+fi
+
+###################################
+if [ -n "$do_h263" ] ; then
+# h263 encoding
+file=${outfile}h263.avi
+do_ffmpeg $file -y -qscale 10 -f pgmyuv -i $raw_src -s 352x288 -an -vcodec h263 $file
+
+# h263p decoding
+do_ffmpeg $raw_dst -y -i $file -f rawvideo $raw_dst 
+fi
+
+###################################
+if [ -n "$do_mpeg4" ] ; then
+# mpeg4
+file=${outfile}odivx.avi
+do_ffmpeg $file -y -qscale 10 -f pgmyuv -i $raw_src -an -vcodec mpeg4 $file
+
+# mpeg4 decoding
+do_ffmpeg $raw_dst -y -i $file -f rawvideo $raw_dst 
+fi
+
+###################################
+if [ -n "$do_mjpeg" ] ; then
+# mjpeg
+file=${outfile}mjpeg.avi
+do_ffmpeg $file -y -qscale 10 -f pgmyuv -i $raw_src -an -vcodec mjpeg $file
+
+# mjpeg decoding
+do_ffmpeg $raw_dst -y -i $file -f rawvideo $raw_dst 
+fi
+
+###################################
+if [ -n "$do_rv10" ] ; then
+# rv10 encoding
+file=${outfile}rv10.rm
+do_ffmpeg $file -y -qscale 10 -f pgmyuv -i $raw_src -an $file 
+
+# rv10 decoding
+do_ffmpeg $raw_dst -y -i $file -f rawvideo $raw_dst 
+fi
+
+###################################
+if [ -n "$do_mp2" ] ; then
+# mp2 encoding
+file=${outfile}mp2.mp2
+do_ffmpeg $file -y -ab 128 -ac 2 -ar 44100 -f s16le -i $pcm_src $file 
+
+# mp2 decoding
+do_ffmpeg $pcm_dst -y -i $file -f wav $pcm_dst 
+fi
+
+###################################
+if [ -n "$do_ac3" ] ; then
+# ac3 encoding
+file=${outfile}ac3.rm
+do_ffmpeg $file -y -ab 128 -ac 2 -f s16le  -i $pcm_src -vn $file 
+
+# ac3 decoding
+do_ffmpeg $pcm_dst -y -i $file -f wav $pcm_dst 
+fi
+
+
+if diff -u $logfile $reffile ; then
+    echo 
+    echo Regression test succeeded.
+    exit 0
+else
+    echo 
+    echo Regression test: Error.
+    exit 1
+fi
diff --git a/tests/videogen.c b/tests/videogen.c
new file mode 100644
index 0000000000..396fcdd605
--- /dev/null
+++ b/tests/videogen.c
@@ -0,0 +1,278 @@
+/*
+ * Generates a synthetic YUV video sequence suitable for codec testing.
+ * NOTE: no floats are used to guaranty a bit exact output.
+ */
+#include <stdlib.h>
+#include <stdio.h>
+
+#define SCALEBITS 8
+#define ONE_HALF  (1 << (SCALEBITS - 1))
+#define FIX(x)		((int) ((x) * (1L<<SCALEBITS) + 0.5))
+typedef unsigned char UINT8;
+
+static void rgb24_to_yuv420p(UINT8 *lum, UINT8 *cb, UINT8 *cr,
+                              UINT8 *src, int width, int height)
+{
+    int wrap, wrap3, x, y;
+    int r, g, b, r1, g1, b1;
+    UINT8 *p;
+
+    wrap = width;
+    wrap3 = width * 3;
+    p = src;
+    for(y=0;y<height;y+=2) {
+        for(x=0;x<width;x+=2) {
+            r = p[0];
+            g = p[1];
+            b = p[2];
+            r1 = r;
+            g1 = g;
+            b1 = b;
+            lum[0] = (FIX(0.29900) * r + FIX(0.58700) * g + 
+                      FIX(0.11400) * b + ONE_HALF) >> SCALEBITS;
+            r = p[3];
+            g = p[4];
+            b = p[5];
+            r1 += r;
+            g1 += g;
+            b1 += b;
+            lum[1] = (FIX(0.29900) * r + FIX(0.58700) * g + 
+                      FIX(0.11400) * b + ONE_HALF) >> SCALEBITS;
+            p += wrap3;
+            lum += wrap;
+
+            r = p[0];
+            g = p[1];
+            b = p[2];
+            r1 += r;
+            g1 += g;
+            b1 += b;
+            lum[0] = (FIX(0.29900) * r + FIX(0.58700) * g + 
+                      FIX(0.11400) * b + ONE_HALF) >> SCALEBITS;
+            r = p[3];
+            g = p[4];
+            b = p[5];
+            r1 += r;
+            g1 += g;
+            b1 += b;
+            lum[1] = (FIX(0.29900) * r + FIX(0.58700) * g + 
+                      FIX(0.11400) * b + ONE_HALF) >> SCALEBITS;
+            
+            cb[0] = ((- FIX(0.16874) * r1 - FIX(0.33126) * g1 + 
+                      FIX(0.50000) * b1 + 4 * ONE_HALF - 1) >> (SCALEBITS + 2)) + 128;
+            cr[0] = ((FIX(0.50000) * r1 - FIX(0.41869) * g1 - 
+                     FIX(0.08131) * b1 + 4 * ONE_HALF - 1) >> (SCALEBITS + 2)) + 128;
+
+            cb++;
+            cr++;
+            p += -wrap3 + 2 * 3;
+            lum += -wrap + 2;
+        }
+        p += wrap3;
+        lum += wrap;
+    }
+}
+
+/* cif format */
+#define DEFAULT_WIDTH   352
+#define DEFAULT_HEIGHT  288
+#define DEFAULT_NB_PICT 125 /* 5 seconds */
+
+void pgmyuv_save(const char *filename, int w, int h,
+                 unsigned char *rgb_tab)
+{
+    FILE *f;
+    int i, h2, w2;
+    unsigned char *cb, *cr;
+    unsigned char *lum_tab, *cb_tab, *cr_tab;
+
+    lum_tab = malloc(w * h);
+    cb_tab = malloc((w * h) / 4);
+    cr_tab = malloc((w * h) / 4);
+
+    rgb24_to_yuv420p(lum_tab, cb_tab, cr_tab, rgb_tab, w, h);
+
+    f = fopen(filename,"w");
+    fprintf(f, "P5\n%d %d\n%d\n", w, (h * 3) / 2, 255);
+    fwrite(lum_tab, 1, w * h, f);
+    h2 = h / 2;
+    w2 = w / 2;
+    cb = cb_tab;
+    cr = cr_tab;
+    for(i=0;i<h2;i++) {
+        fwrite(cb, 1, w2, f);
+        fwrite(cr, 1, w2, f);
+        cb += w2;
+        cr += w2;
+    }
+    fclose(f);
+
+    free(lum_tab);
+    free(cb_tab);
+    free(cr_tab);
+}
+
+unsigned char *rgb_tab;
+int width, height, wrap;
+
+void put_pixel(int x, int y, int r, int g, int b)
+{
+    unsigned char *p;
+
+    if (x < 0 || x >= width ||
+        y < 0 || y >= height)
+        return;
+
+    p = rgb_tab + y * wrap + x * 3;
+    p[0] = r;
+    p[1] = g;
+    p[2] = b;
+}
+
+static unsigned int myrnd(unsigned int *seed_ptr, int n)
+{
+    unsigned int seed, val;
+
+    seed = *seed_ptr;
+    seed = (seed * 314159) + 1;
+    if (n == 256) {
+        val = seed >> 24;
+    } else {
+        val = seed % n;
+    }
+    *seed_ptr = seed;
+    return val;
+}
+
+#define NOISE_X  10
+#define NOISE_Y  30
+#define NOISE_W  26
+
+#define FRAC_BITS 8
+#define FRAC_ONE (1 << FRAC_BITS)
+
+/* cosine approximate with 1-x^2 */
+int int_cos(int a)
+{
+    int v, neg;
+    a = a & (FRAC_ONE - 1);
+    if (a >= (FRAC_ONE / 2))
+        a = FRAC_ONE - a;
+    neg = 0;
+    if (a > (FRAC_ONE / 4)) {
+        neg = -1;
+        a = (FRAC_ONE / 2) - a;
+    }
+    v = FRAC_ONE - ((a * a) >> 4);
+    v = (v ^ neg) - neg;
+    return v;
+}
+
+#define NB_OBJS  10
+
+typedef struct VObj {
+    int x, y, w, h;
+    int r, g, b;
+} VObj;
+
+VObj objs[NB_OBJS];
+
+unsigned int seed = 1;
+
+void gen_image(int num, int w, int h)
+{
+    int r, g, b, x, y, i, dx, dy, x1, y1;
+    unsigned int seed1;
+
+    if (num == 0) {
+        for(i=0;i<NB_OBJS;i++) {
+            objs[i].x = myrnd(&seed, w);
+            objs[i].y = myrnd(&seed, h);
+            objs[i].w = myrnd(&seed, w / 4) + 10;
+            objs[i].h = myrnd(&seed, h / 4) + 10;
+            objs[i].r = myrnd(&seed, 256);
+            objs[i].g = myrnd(&seed, 256);
+            objs[i].b = myrnd(&seed, 256);
+        }
+    }
+
+    /* first a moving background with gradients */
+    /* test motion estimation */
+    dx = int_cos(num * FRAC_ONE / 50) * 35;
+    dy = int_cos(num * FRAC_ONE / 50 + FRAC_ONE / 10) * 30;
+    for(y=0;y<h;y++) {
+        for(x=0;x<w;x++) {
+            x1 = (x << FRAC_BITS) + dx;
+            y1 = (y << FRAC_BITS) + dx;
+            r = ((y1 * 7) >> FRAC_BITS) & 0xff;
+            g = (((x1 + y1) * 9) >> FRAC_BITS) & 0xff;
+            b = ((x1 * 5) >> FRAC_BITS) & 0xff;
+            put_pixel(x, y, r, g, b);
+        }
+    }
+
+    /* then some noise with very high intensity to test saturation */
+    seed1 = num;
+    for(y=0;y<NOISE_W;y++) {
+        for(x=0;x<NOISE_W;x++) {
+            r = myrnd(&seed1, 256);
+            g = myrnd(&seed1, 256);
+            b = myrnd(&seed1, 256);
+            put_pixel(x + NOISE_X, y + NOISE_Y, r, g, b);
+        }
+    }
+    
+    /* then moving objects */
+    for(i=0;i<NB_OBJS;i++) {
+        VObj *p = &objs[i];
+        seed1 = i;
+        for(y=0;y<p->h;y++) {
+            for(x=0;x<p->w;x++) {
+                r = p->r;
+                g = p->g;
+                b = p->b;
+                /* add a per object noise */
+                r += myrnd(&seed1, 50);
+                g += myrnd(&seed1, 50);
+                b += myrnd(&seed1, 50);
+                put_pixel(x + p->x, y + p->y, r, g, b);
+            }
+        }
+        p->x += myrnd(&seed, 21) - 10;
+        p->y += myrnd(&seed, 21) - 10;
+    }
+}
+
+int main(int argc, char **argv)
+{
+    int w, h, i;
+    char buf[1024];
+
+    if (argc != 2) {
+        printf("usage: %s file\n"
+               "generate a test video stream\n", argv[0]);
+        exit(1);
+    }
+
+#if 0
+    for(i=0;i<256;i++)
+        printf("cos(%d)=%d\n", i, int_cos(i));
+#endif
+
+    w = DEFAULT_WIDTH;
+    h = DEFAULT_HEIGHT;
+
+    rgb_tab = malloc(w * h * 3);
+    wrap = w * 3;
+    width = w;
+    height = h;
+
+    for(i=0;i<DEFAULT_NB_PICT;i++) {
+        snprintf(buf, sizeof(buf), "%s%d.pgm", argv[1], i);
+        gen_image(i, w, h);
+        pgmyuv_save(buf, w, h, rgb_tab);
+    }
+    
+    free(rgb_tab);
+    return 0;
+}