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export gcd function as av_gcd() 

Originally committed as revision 16653 to svn://svn.ffmpeg.org/ffmpeg/trunk
This commit is contained in:
Aurelien Jacobs 2009-01-17 11:13:33 +00:00
parent 3194b00479
commit 9ce6c13879
14 changed files with 19 additions and 20 deletions
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2
libavcodec/h263.c
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@ -5156,7 +5156,7 @@ int h263_decode_picture_header(MpegEncContext *s)
av_log(s, AV_LOG_ERROR, "zero framerate\n");
return -1;
}
gcd= ff_gcd(s->avctx->time_base.den, s->avctx->time_base.num);
gcd= av_gcd(s->avctx->time_base.den, s->avctx->time_base.num);
s->avctx->time_base.den /= gcd;
s->avctx->time_base.num /= gcd;
// av_log(s->avctx, AV_LOG_DEBUG, "%d/%d\n", s->avctx->time_base.den, s->avctx->time_base.num);

4
libavcodec/libxvidff.c
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@ -557,7 +557,7 @@ void xvid_correct_framerate(AVCodecContext *avctx) {
frate = avctx->time_base.den;
fbase = avctx->time_base.num;
gcd = ff_gcd(frate, fbase);
gcd = av_gcd(frate, fbase);
if( gcd > 1 ) {
frate /= gcd;
fbase /= gcd;
@ -579,7 +579,7 @@ void xvid_correct_framerate(AVCodecContext *avctx) {
} else
est_fbase = 1;
gcd = ff_gcd(est_frate, est_fbase);
gcd = av_gcd(est_frate, est_fbase);
if( gcd > 1 ) {
est_frate /= gcd;
est_fbase /= gcd;

2
libavcodec/mpegvideo_enc.c
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@ -464,7 +464,7 @@ av_cold int MPV_encode_init(AVCodecContext *avctx)
avctx->b_frame_strategy = 0;
}
i= ff_gcd(avctx->time_base.den, avctx->time_base.num);
i= av_gcd(avctx->time_base.den, avctx->time_base.num);
if(i > 1){
av_log(avctx, AV_LOG_INFO, "removing common factors from framerate\n");
avctx->time_base.den /= i;

2
libavcodec/snow.c
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@ -4773,7 +4773,7 @@ int main(void){
}
error= (int)(sqrt(error)+0.5);
errors[level][orientation]= error;
if(g) g=ff_gcd(g, error);
if(g) g=av_gcd(g, error);
else g= error;
}
}

2
libavcodec/utils.c
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@ -694,7 +694,7 @@ void avcodec_string(char *buf, int buf_size, AVCodecContext *enc, int encode)
display_aspect_ratio.num, display_aspect_ratio.den);
}
if(av_log_get_level() >= AV_LOG_DEBUG){
int g= ff_gcd(enc->time_base.num, enc->time_base.den);
int g= av_gcd(enc->time_base.num, enc->time_base.den);
snprintf(buf + strlen(buf), buf_size - strlen(buf),
", %d/%d",
enc->time_base.num/g, enc->time_base.den/g);

4
libavformat/mov.c
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@ -1172,7 +1172,7 @@ static int mov_read_stts(MOVContext *c, ByteIOContext *pb, MOVAtom atom)
sc->stts_data[i].count= sample_count;
sc->stts_data[i].duration= sample_duration;
sc->time_rate= ff_gcd(sc->time_rate, sample_duration);
sc->time_rate= av_gcd(sc->time_rate, sample_duration);
dprintf(c->fc, "sample_count=%d, sample_duration=%d\n",sample_count,sample_duration);
@ -1215,7 +1215,7 @@ static int mov_read_ctts(MOVContext *c, ByteIOContext *pb, MOVAtom atom)
sc->ctts_data[i].count = count;
sc->ctts_data[i].duration= duration;
sc->time_rate= ff_gcd(sc->time_rate, FFABS(duration));
sc->time_rate= av_gcd(sc->time_rate, FFABS(duration));
}
return 0;
}

2
libavformat/nutdec.c
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@ -206,7 +206,7 @@ static int decode_main_header(NUTContext *nut){
for(i=0; i<nut->time_base_count; i++){
GET_V(nut->time_base[i].num, tmp>0 && tmp<(1ULL<<31))
GET_V(nut->time_base[i].den, tmp>0 && tmp<(1ULL<<31))
if(ff_gcd(nut->time_base[i].num, nut->time_base[i].den) != 1){
if(av_gcd(nut->time_base[i].num, nut->time_base[i].den) != 1){
av_log(s, AV_LOG_ERROR, "time base invalid\n");
return -1;
}

2
libavformat/riff.c
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@ -466,7 +466,7 @@ void ff_parse_specific_params(AVCodecContext *stream, int *au_rate, int *au_ssiz
*au_scale= stream->block_align ? stream->block_align*8 : 8;
*au_rate = stream->bit_rate ? stream->bit_rate : 8*stream->sample_rate;
}
gcd= ff_gcd(*au_scale, *au_rate);
gcd= av_gcd(*au_scale, *au_rate);
*au_scale /= gcd;
*au_rate /= gcd;
}

4
libavformat/utils.c
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@ -2727,7 +2727,7 @@ static void dump_stream_format(AVFormatContext *ic, int i, int index, int is_out
char buf[256];
int flags = (is_output ? ic->oformat->flags : ic->iformat->flags);
AVStream *st = ic->streams[i];
int g = ff_gcd(st->time_base.num, st->time_base.den);
int g = av_gcd(st->time_base.num, st->time_base.den);
avcodec_string(buf, sizeof(buf), st->codec, is_output);
av_log(NULL, AV_LOG_INFO, " Stream #%d.%d", index, i);
/* the pid is an important information, so we display it */
@ -3192,7 +3192,7 @@ char *ff_data_to_hex(char *buff, const uint8_t *src, int s)
void av_set_pts_info(AVStream *s, int pts_wrap_bits,
int pts_num, int pts_den)
{
unsigned int gcd= ff_gcd(pts_num, pts_den);
unsigned int gcd= av_gcd(pts_num, pts_den);
s->pts_wrap_bits = pts_wrap_bits;
s->time_base.num = pts_num/gcd;
s->time_base.den = pts_den/gcd;

2
libavutil/avutil.h
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@ -35,7 +35,7 @@
#define AV_VERSION(a, b, c) AV_VERSION_DOT(a, b, c)
#define LIBAVUTIL_VERSION_MAJOR 49
#define LIBAVUTIL_VERSION_MINOR 12
#define LIBAVUTIL_VERSION_MINOR 13
#define LIBAVUTIL_VERSION_MICRO 0
#define LIBAVUTIL_VERSION_INT AV_VERSION_INT(LIBAVUTIL_VERSION_MAJOR, \

3
libavutil/common.h
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@ -242,9 +242,6 @@ static inline av_const float av_clipf(float a, float amin, float amax)
else return a;
}
/* math */
int64_t av_const ff_gcd(int64_t a, int64_t b);
/**
* converts fourcc string to int
*/

4
libavutil/mathematics.c
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@ -48,8 +48,8 @@ const uint8_t ff_log2_tab[256]={
7,7,7,7,7,7,7,7,7,7,7,7,7,7,7,7,7,7,7,7,7,7,7,7,7,7,7,7,7,7,7,7
};
int64_t ff_gcd(int64_t a, int64_t b){
if(b) return ff_gcd(b, a%b);
int64_t av_gcd(int64_t a, int64_t b){
if(b) return av_gcd(b, a%b);
else return a;
}

2
libavutil/mathematics.h
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@ -49,6 +49,8 @@ enum AVRounding {
AV_ROUND_NEAR_INF = 5, ///< round to nearest and halfway cases away from zero
};
int64_t av_const av_gcd(int64_t a, int64_t b);
/**
* rescale a 64bit integer with rounding to nearest.
* a simple a*b/c isn't possible as it can overflow

4
libavutil/rational.c
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@ -35,7 +35,7 @@
int av_reduce(int *dst_nom, int *dst_den, int64_t nom, int64_t den, int64_t max){
AVRational a0={0,1}, a1={1,0};
int sign= (nom<0) ^ (den<0);
int64_t gcd= ff_gcd(FFABS(nom), FFABS(den));
int64_t gcd= av_gcd(FFABS(nom), FFABS(den));
if(gcd){
nom = FFABS(nom)/gcd;
@ -66,7 +66,7 @@ int av_reduce(int *dst_nom, int *dst_den, int64_t nom, int64_t den, int64_t max)
nom= den;
den= next_den;
}
assert(ff_gcd(a1.num, a1.den) <= 1U);
assert(av_gcd(a1.num, a1.den) <= 1U);
*dst_nom = sign ? -a1.num : a1.num;
*dst_den = a1.den;