ffmpeg | branch: master | Andreas Rheinhardt <andreas.rheinha...@outlook.com> | Sat Jun 14 00:36:31 2025 +0200| [f8c0ac9984e38b2f7221cb8838cddde35d0181de] | committer: Andreas Rheinhardt
avcodec/ituh263enc: Simplify encoding umotion vectors There is no need to use two loops. Signed-off-by: Andreas Rheinhardt <andreas.rheinha...@outlook.com> > http://git.videolan.org/gitweb.cgi/ffmpeg.git/?a=commit;h=f8c0ac9984e38b2f7221cb8838cddde35d0181de --- libavcodec/ituh263enc.c | 38 ++++++++++---------------------------- 1 file changed, 10 insertions(+), 28 deletions(-) diff --git a/libavcodec/ituh263enc.c b/libavcodec/ituh263enc.c index d1d07bc5f8..903bb45fce 100644 --- a/libavcodec/ituh263enc.c +++ b/libavcodec/ituh263enc.c @@ -573,38 +573,20 @@ static void h263_encode_block(MPVEncContext *const s, int16_t block[], int n) /* Encode MV differences on H.263+ with Unrestricted MV mode */ static void h263p_encode_umotion(PutBitContext *pb, int val) { - short sval = 0; - short i = 0; - short n_bits = 0; - short temp_val; - int code = 0; - int tcode; - if ( val == 0) put_bits(pb, 1, 1); - else if (val == 1) - put_bits(pb, 3, 0); - else if (val == -1) - put_bits(pb, 3, 2); else { - - sval = ((val < 0) ? (short)(-val):(short)val); - temp_val = sval; - - while (temp_val != 0) { - temp_val = temp_val >> 1; - n_bits++; - } - - i = n_bits - 1; - while (i > 0) { - tcode = (sval & (1 << (i-1))) >> (i-1); - tcode = (tcode << 1) | 1; - code = (code << 2) | tcode; - i--; + unsigned code = (val < 0) << 1; + unsigned aval = val < 0 ? -val : val; + unsigned n_bits = 2; + + while (aval != 1) { // The leading digit is implicitly coded via length + unsigned tmp = (aval & 1) << 1 | 1; + aval >>= 1; + code |= tmp << n_bits; + n_bits += 2; } - code = ((code << 1) | (val < 0)) << 1; - put_bits(pb, (2*n_bits)+1, code); + put_bits(pb, n_bits + 1, code); } } _______________________________________________ ffmpeg-cvslog mailing list ffmpeg-cvslog@ffmpeg.org https://ffmpeg.org/mailman/listinfo/ffmpeg-cvslog To unsubscribe, visit link above, or email ffmpeg-cvslog-requ...@ffmpeg.org with subject "unsubscribe".
