constraint_parameter_flag fix

Originally committed as revision 2299 to svn://svn.ffmpeg.org/ffmpeg/trunk

libavcodec/mpeg12.c

@@ -189,6 +189,7 @@ static void mpeg1_encode_sequence_header(MpegEncContext *s)
         uint64_t time_code;
         float best_aspect_error= 1E10;
         float aspect_ratio= s->avctx->aspect_ratio;
+        int constraint_parameter_flag;
         
         if(aspect_ratio==0.0) aspect_ratio= s->width / (float)s->height; //pixel aspect 1:1 (VGA)
         
@@ -245,8 +246,18 @@ static void mpeg1_encode_sequence_header(MpegEncContext *s)
 
             put_bits(&s->pb, 18, v & 0x3FFFF);
             put_bits(&s->pb, 1, 1); /* marker */
-            put_bits(&s->pb, 10, vbv_buffer_size & 0x3FF); 
-            put_bits(&s->pb, 1, 1); /* constrained parameter flag */
+            put_bits(&s->pb, 10, vbv_buffer_size & 0x3FF);
+
+            constraint_parameter_flag= 
+                s->width <= 768 && s->height <= 576 && 
+                s->mb_width * s->mb_height <= 396 &&
+                s->mb_width * s->mb_height * frame_rate_tab[s->frame_rate_index] <= MPEG1_FRAME_RATE_BASE*396*25 &&
+                frame_rate_tab[s->frame_rate_index] <= MPEG1_FRAME_RATE_BASE*30 &&
+                vbv_buffer_size <= 20 &&
+                v <= 1856000/400 &&
+                s->codec_id == CODEC_ID_MPEG1VIDEO;
+                
+            put_bits(&s->pb, 1, constraint_parameter_flag);
             
             ff_write_quant_matrix(&s->pb, s->avctx->intra_matrix);
             ff_write_quant_matrix(&s->pb, s->avctx->inter_matrix);

tests/ffmpeg.regression.ref

 ffmpeg regression test
-b85daef6da4204e2f85376a34d9ada8d *./data/a-mpeg1.mpg
+74e25b401f34321aeb854e264ef62df8 *./data/a-mpeg1.mpg
 6713259d72260740bbddaea30631ea18 *./data/out.yuv
 stddev:  7.58 bytes:7299072
-88114b12ff7d0e0b54639814cf323841 *./data/a-mpeg2.vob
+059aa59cb848fc278b278f816400d2bb *./data/a-mpeg2.vob
 0f3dbc8ee895c7853e06b8dec279c666 *./data/out.yuv
 stddev:  7.62 bytes:7299072
 d0dc46dd831398237a690ebbeff18b64 *./data/a-msmpeg4v2.avi
@@ -35,7 +35,7 @@ stddev: 10.53 bytes:7145472
 2cbab98ebef5fbd229c66fb6435bf9a2 *./data/a-mpeg4-adv.avi
 b54262af56f6681186fa2c44e4ef6ec7 *./data/out.yuv
 stddev:  7.32 bytes:7602176
-fbc13e69385301ae9b8ba34b5baa7881 *./data/a-mpeg1b.mpg
+843225ac495abfcc480296143c26bde3 *./data/a-mpeg1b.mpg
 da8e21c7b78b7a25558dc319524b91d8 *./data/out.yuv
 stddev:  6.32 bytes:6842368
 07042f42b3119c39eb26537a84a451df *./data/a-mjpeg.avi

tests/rotozoom.regression.ref

 ffmpeg regression test
-31334d408162b55725075347e382d313 *./data/a-mpeg1.mpg
+a6ccb5e768c7bed7a08f8e4343d81871 *./data/a-mpeg1.mpg
 0cf790edd0f4c5cf993c2d59211b9de2 *./data/out.yuv
 stddev:  4.91 bytes:7299072
-e75529f50f81fa8d102938d9f3f85471 *./data/a-mpeg2.vob
+37762c54fafba01dd08ce4584b92b850 *./data/a-mpeg2.vob
 e32c521f104a6e11b26a6165bcad33f7 *./data/out.yuv
 stddev:  4.93 bytes:7299072
 14db391f167b52b21a983157b410affc *./data/a-msmpeg4v2.avi
@@ -35,7 +35,7 @@ stddev:  4.32 bytes:7145472
 aeb300900461bdf9e0321934aa6dcc93 *./data/a-mpeg4-adv.avi
 e465df12f2c8a6492a6ec0b1bddc1d0d *./data/out.yuv
 stddev:  4.97 bytes:7602176
-d48038039d4874ebaeeb5fe8346d1350 *./data/a-mpeg1b.mpg
+fd09e45413a6b6e3a19bf9dd77503b17 *./data/a-mpeg1b.mpg
 71e80b8ff8da567f1bbff000cd925627 *./data/out.yuv
 stddev:  4.07 bytes:6842368
 e9218a1db885fe0262e88f9df630307d *./data/a-mjpeg.avi