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replaygain: fix gain sign decoding

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The gain sign was incorrectly decoded: since the FFSIGN() macro treats 0 as
negative, gain values starting with "0." were always decoded as negative.

Signed-off-by: Anton Khirnov <anton@khirnov.net>
This commit is contained in:
Alessandro Ghedini 2014-04-04 11:50:43 +02:00 committed by Anton Khirnov
parent f37815b1d5
commit 25b6837f7c
1 changed files with 5 additions and 1 deletions
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6
libavformat/replaygain.c
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@ -40,6 +40,7 @@ static int32_t parse_gain(const char *gain)
char *fraction; char *fraction;
int scale = 10000; int scale = 10000;
int32_t mb = 0; int32_t mb = 0;
int sign = 1;
int db; int db;
if (!gain) if (!gain)
@ -47,6 +48,9 @@ static int32_t parse_gain(const char *gain)
gain += strspn(gain, " \t"); gain += strspn(gain, " \t");
if (*gain == '-')
sign = -1;
db = strtol(gain, &fraction, 0); db = strtol(gain, &fraction, 0);
if (*fraction++ == '.') { if (*fraction++ == '.') {
while (av_isdigit(*fraction) && scale) { while (av_isdigit(*fraction) && scale) {
@ -59,7 +63,7 @@ static int32_t parse_gain(const char *gain)
if (abs(db) > (INT32_MAX - mb) / 100000) if (abs(db) > (INT32_MAX - mb) / 100000)
return INT32_MIN; return INT32_MIN;
return db * 100000 + FFSIGN(db) * mb; return db * 100000 + sign * mb;
} }
static uint32_t parse_peak(const uint8_t *peak) static uint32_t parse_peak(const uint8_t *peak)