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Code Issues Releases Activity

more usage of av_clip()

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Originally committed as revision 10082 to svn://svn.ffmpeg.org/ffmpeg/trunk
This commit is contained in:
Aurelien Jacobs 2007-08-11 23:29:21 +00:00
parent e4a50e6d2e
commit 88e2d5882b
1 changed files with 2 additions and 14 deletions
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16
libavcodec/adpcm.c
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@ -706,11 +706,7 @@ static inline short adpcm_ct_expand_nibble(ADPCMChannelStatus *c, char nibble)
c->predictor = av_clip_int16(c->predictor); c->predictor = av_clip_int16(c->predictor);
/* calculate new step and clamp it to range 511..32767 */ /* calculate new step and clamp it to range 511..32767 */
new_step = (ct_adpcm_table[nibble & 7] * c->step) >> 8; new_step = (ct_adpcm_table[nibble & 7] * c->step) >> 8;
c->step = new_step; c->step = av_clip(new_step, 511, 32767);
if(c->step < 511)
c->step = 511;
if(c->step > 32767)
c->step = 32767;
return (short)c->predictor; return (short)c->predictor;
} }
@ -723,16 +719,8 @@ static inline short adpcm_sbpro_expand_nibble(ADPCMChannelStatus *c, char nibble
delta = nibble & ((1<<(size-1))-1); delta = nibble & ((1<<(size-1))-1);
diff = delta << (7 + c->step + shift); diff = delta << (7 + c->step + shift);
if (sign)
c->predictor -= diff;
else
c->predictor += diff;
/* clamp result */ /* clamp result */
if (c->predictor > 16256) c->predictor = av_clip(c->predictor + (sign ? -diff : diff), -16384,16256);
c->predictor = 16256;
else if (c->predictor < -16384)
c->predictor = -16384;
/* calculate new step */ /* calculate new step */
if (delta >= (2*size - 3) && c->step < 3) if (delta >= (2*size - 3) && c->step < 3)