[SCM] libav/experimental: h263 framerate & aspect ratio fixes

[siretart at users.alioth.debian.org]

The following commit has been merged in the experimental branch:
commit e82d912dba14d6d5ee53f84544ef50b79c288925
Author: Michael Niedermayer <michaelni at gmx.at>
Date:   Sat Mar 6 12:33:56 2004 +0000

    h263 framerate & aspect ratio fixes
    
    Originally committed as revision 2854 to svn://svn.ffmpeg.org/ffmpeg/trunk

diff --git a/libavcodec/h263.c b/libavcodec/h263.c
index 3df42aa..89d4c14 100644
--- a/libavcodec/h263.c
+++ b/libavcodec/h263.c
@@ -204,8 +204,8 @@ void h263_encode_picture_header(MpegEncContext * s, int picture_number)
     /* Update the pointer to last GOB */
     s->ptr_lastgob = pbBufPtr(&s->pb);
     put_bits(&s->pb, 22, 0x20); /* PSC */
-    put_bits(&s->pb, 8, (((int64_t)s->picture_number * 30 * s->avctx->frame_rate_base) / 
-                         s->avctx->frame_rate) & 0xff);
+    put_bits(&s->pb, 8, ((s->picture_number * 30000LL * s->avctx->frame_rate_base) / 
+                         (1001LL  *s->avctx->frame_rate)) & 0xff); /* TemporalReference */
 
     put_bits(&s->pb, 1, 1);	/* marker */
     put_bits(&s->pb, 1, 0);	/* h263 id */
@@ -4891,7 +4891,10 @@ int h263_decode_picture_header(MpegEncContext *s)
         return -1;
     }
     /* temporal reference */
-    s->picture_number = get_bits(&s->gb, 8); /* picture timestamp */
+    i = get_bits(&s->gb, 8); /* picture timestamp */
+    if( (s->picture_number&~0xFF)+i < s->picture_number)
+        i+= 256;
+    s->picture_number= (s->picture_number&~0xFF) + i;
 
     /* PTYPE starts here */    
     if (get_bits1(&s->gb) != 1) {
@@ -4943,6 +4946,9 @@ int h263_decode_picture_header(MpegEncContext *s)
 
         s->width = width;
         s->height = height;
+        s->avctx->sample_aspect_ratio= (AVRational){12,11};
+        s->avctx->frame_rate     = 30000;
+        s->avctx->frame_rate_base= 1001;
     } else {
         int ufep;
         
@@ -4955,7 +4961,9 @@ int h263_decode_picture_header(MpegEncContext *s)
             /* OPPTYPE */       
             format = get_bits(&s->gb, 3);
             dprintf("ufep=1, format: %d\n", format);
-            skip_bits(&s->gb,1); /* Custom PCF */
+            if (get_bits1(&s->gb) != 0) {
+                av_log(s->avctx, AV_LOG_ERROR, "Custom PCF not supported\n");
+            }
             s->umvplus = get_bits(&s->gb, 1); /* Unrestricted Motion Vector */
             if (get_bits1(&s->gb) != 0) {
                 av_log(s->avctx, AV_LOG_ERROR, "Syntax-based Arithmetic Coding (SAC) not supported\n");
@@ -5028,9 +5036,12 @@ int h263_decode_picture_header(MpegEncContext *s)
             } else {
                 width = h263_format[format][0];
                 height = h263_format[format][1];
+                s->avctx->sample_aspect_ratio= (AVRational){12,11};
             }
             if ((width == 0) || (height == 0))
                 return -1;
+            s->avctx->frame_rate     = 30000;
+            s->avctx->frame_rate_base= 1001;
             s->width = width;
             s->height = height;
             if (s->umvplus) {
diff --git a/tests/ffmpeg.regression.ref b/tests/ffmpeg.regression.ref
index 0114cb9..4a6b36f 100644
--- a/tests/ffmpeg.regression.ref
+++ b/tests/ffmpeg.regression.ref
@@ -23,10 +23,10 @@ stddev:  8.10 PSNR:29.94 bytes:7602176
 30dcbbe391149d981162a1f4727c43d6 *./data/a-wmv2.avi
 7261e23fd8ad1de6efee022051b936be *./data/out.yuv
 stddev:  8.10 PSNR:29.94 bytes:7602176
-4bf9df20cdeb1aa01115761642b4e80b *./data/a-h263.avi
+48bc3eb55962ebb5a78359727d2bf4d8 *./data/a-h263.avi
 545df74e0aa443499600faedd10a7065 *./data/out.yuv
 stddev:  8.18 PSNR:29.86 bytes:7602176
-920a0a8a0063655d1f34dcaad7857f98 *./data/a-h263p.avi
+a35a0d81d47e4e0c96a18ec67306db32 *./data/a-h263p.avi
 0eb167c9dfcbeeecbf3debed8af8f811 *./data/out.yuv
 stddev:  2.08 PSNR:41.74 bytes:7602176
 1499f43271be5e95880954670620eb1f *./data/a-odivx.mp4
diff --git a/tests/rotozoom.regression.ref b/tests/rotozoom.regression.ref
index 5b32ac0..95f6cfd 100644
--- a/tests/rotozoom.regression.ref
+++ b/tests/rotozoom.regression.ref
@@ -23,10 +23,10 @@ stddev:  5.29 PSNR:33.65 bytes:7602176
 ba4616dc4db0db636a7c26bc8f2de04e *./data/a-wmv2.avi
 407c23671e7c7265c19c91966dbba317 *./data/out.yuv
 stddev:  5.29 PSNR:33.65 bytes:7602176
-f980b5e38c4b919fbe5b660fe12fcf1a *./data/a-h263.avi
+bc321858c3b669ac2c2f47eca275c7d5 *./data/a-h263.avi
 8bcc9f78373ec424e864b40734e124ba *./data/out.yuv
 stddev:  5.41 PSNR:33.45 bytes:7602176
-f7828488c31ccb6787367ef4e4a2ad42 *./data/a-h263p.avi
+d669d8ac80c4f25e2008ce31ea386465 *./data/a-h263p.avi
 7d39d1f272205a6a231d0e0baf32ff9d *./data/out.yuv
 stddev:  1.91 PSNR:42.49 bytes:7602176
 406dd7eaf5d09702d2b7164197a640a9 *./data/a-odivx.mp4

-- 
Libav/FFmpeg packaging