try to select w/h from tables

Originally committed as revision 3443 to svn://svn.ffmpeg.org/ffmpeg/trunk

libavcodec/svq1.c

@@ -880,6 +880,8 @@ static int svq1_decode_end(AVCodecContext *avctx)
 
 static void svq1_write_header(SVQ1Context *s, int frame_type)
 {
+    int i;
+
     /* frame code */
     put_bits(&s->pb, 22, 0x20);
 
@@ -898,12 +900,22 @@ static void svq1_write_header(SVQ1Context *s, int frame_type)
         /* output 5 unknown bits (2 + 2 + 1) */
         put_bits(&s->pb, 5, 0);
 
-        /* forget about matching up resolutions, just use the free-form
-         * resolution code (7) for now */
-        put_bits(&s->pb, 3, 7);
-        put_bits(&s->pb, 12, s->frame_width);
-        put_bits(&s->pb, 12, s->frame_height);
-
+	for (i = 0; i < 7; i++)
+	{
+	    if ((svq1_frame_size_table[i].width == s->frame_width) &&
+		(svq1_frame_size_table[i].height == s->frame_height))
+	    {
+		put_bits(&s->pb, 3, i);
+		break;
+	    }
+	}
+	
+	if (i == 7)
+	{
+	    put_bits(&s->pb, 3, 7);
+    	    put_bits(&s->pb, 12, s->frame_width);
+    	    put_bits(&s->pb, 12, s->frame_height);
+	}
     }
 
     /* no checksum or extra data (next 2 bits get 0) */

tests/ffmpeg.regression.ref

@@ -107,8 +107,8 @@ stddev:  8.08 PSNR:29.97 bytes:7602176
 2653690 ./data/a-ffv1.avi
 799d3db687f6cdd7a837ec156efc171f *./data/out.yuv
 stddev:  0.00 PSNR:99.99 bytes:7602176
-c672f70e2176a897b1ba816749574751 *./data/a-svq1.mov
-1384019 ./data/a-svq1.mov
+b92d6d901574ea17e43e96ea97637078 *./data/a-svq1.mov
+1383999 ./data/a-svq1.mov
 ccc201054669e94717022bb4f2aea4ce *./data/out.yuv
 stddev: 10.99 PSNR:27.30 bytes:7602176
 21f8ff9f1daacd9133683bb4ea0f50a4 *./data/a-mp2.mp2