* ffmpeg update to 51.28.0

  * Workaround ffmpeg buggy codecs that don't release their DR1 frames.
  * Fix several segfaults and freezing problem with H264 streams that use a lot
    of reference frames (eg. 15)
  * Initial support to enable/disable ffmpeg codecs. Codecs may be disabled in
    groups by --disable-ffmpeg-uncommon-codecs/--disable-ffmpeg-popular-codecs
    Think of "uncommon" codecs what people would never want to play with their
    PDAs (they will save memory by removing them).
    Note: currently both uncommon/popular codecs are _build_ but disabled.
    that is, build system still need some improvements to really save memory.
warning: non-autoconf guru playing with the build system, likely breakage.

CVS patchset: 8499
CVS date: 2007/01/13 21:19:52

1 files changed, 16 insertions, 2 deletions

diff --git a/src/libffmpeg/libavcodec/h263.c b/src/libffmpeg/libavcodec/h263.c
index ba51c245a..af5fa50e6 100644
--- a/src/libffmpeg/libavcodec/h263.c
+++ b/src/libffmpeg/libavcodec/h263.c
@@ -487,12 +487,28 @@ static inline void restore_ac_coeffs(MpegEncContext * s, DCTELEM block[6][64], i
 }
 
 /**
+ * init s->current_picture.qscale_table from s->lambda_table
+ */
+static void ff_init_qscale_tab(MpegEncContext *s){
+    int8_t * const qscale_table= s->current_picture.qscale_table;
+    int i;
+
+    for(i=0; i<s->mb_num; i++){
+        unsigned int lam= s->lambda_table[ s->mb_index2xy[i] ];
+        int qp= (lam*139 + FF_LAMBDA_SCALE*64) >> (FF_LAMBDA_SHIFT + 7);
+        qscale_table[ s->mb_index2xy[i] ]= clip(qp, s->avctx->qmin, s->avctx->qmax);
+    }
+}
+
+/**
  * modify qscale so that encoding is acually possible in h263 (limit difference to -2..2)
  */
 void ff_clean_h263_qscales(MpegEncContext *s){
     int i;
     int8_t * const qscale_table= s->current_picture.qscale_table;
 
+    ff_init_qscale_tab(s);
+
     for(i=1; i<s->mb_num; i++){
         if(qscale_table[ s->mb_index2xy[i] ] - qscale_table[ s->mb_index2xy[i-1] ] >2)
             qscale_table[ s->mb_index2xy[i] ]= qscale_table[ s->mb_index2xy[i-1] ]+2;
@@ -507,7 +523,6 @@ void ff_clean_h263_qscales(MpegEncContext *s){
             int mb_xy= s->mb_index2xy[i];
 
             if(qscale_table[mb_xy] != qscale_table[s->mb_index2xy[i-1]] && (s->mb_type[mb_xy]&CANDIDATE_MB_TYPE_INTER4V)){
-                s->mb_type[mb_xy]&= ~CANDIDATE_MB_TYPE_INTER4V;
                 s->mb_type[mb_xy]|= CANDIDATE_MB_TYPE_INTER;
             }
         }
@@ -546,7 +561,6 @@ void ff_clean_mpeg4_qscales(MpegEncContext *s){
         for(i=1; i<s->mb_num; i++){
             int mb_xy= s->mb_index2xy[i];
             if(qscale_table[mb_xy] != qscale_table[s->mb_index2xy[i-1]] && (s->mb_type[mb_xy]&CANDIDATE_MB_TYPE_DIRECT)){
-                s->mb_type[mb_xy]&= ~CANDIDATE_MB_TYPE_DIRECT;
                 s->mb_type[mb_xy]|= CANDIDATE_MB_TYPE_BIDIR;
             }
         }