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use ac prediction in mpeg4 encoding (5% smaller intra-blocks/keyframes)

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some minor optimizations
last non zero index cant be 64 bugfix

Originally committed as revision 331 to svn://svn.ffmpeg.org/ffmpeg/trunk
This commit is contained in:
Michael Niedermayer
2002-03-15 04:10:53 +00:00
parent 49c9325f56
commit d6231b9e70
3 changed files with 263 additions and 23 deletions
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5
libavcodec/mpegvideo.h
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@@ -145,7 +145,7 @@ typedef struct MpegEncContext {
int avg_mb_var; /* average MB variance for current frame */
INT64 wanted_bits;
INT64 total_bits;
/* H.263 specific */
int gob_number;
int gob_index;
@@ -313,6 +313,9 @@ static inline int get_rl_index(const RLTable *rl, int last, int run, int level)
void h263_encode_mb(MpegEncContext *s,
DCTELEM block[6][64],
int motion_x, int motion_y);
void mpeg4_encode_mb(MpegEncContext *s,
DCTELEM block[6][64],
int motion_x, int motion_y);
void h263_encode_picture_header(MpegEncContext *s, int picture_number);
int h263_encode_gob_header(MpegEncContext * s, int mb_line);
void h263_dc_scale(MpegEncContext *s);