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Merge commit '8542f9c4f17125d483c40c0c5723842f1c982f81'

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* commit '8542f9c4f17125d483c40c0c5723842f1c982f81':
  replaygain: correctly parse peak values

Conflicts:
	libavutil/version.h

Merged-by: Michael Niedermayer <michaelni@gmx.at>
This commit is contained in:
Michael Niedermayer 2014-04-04 22:52:12 +02:00
commit c1d053621c
4 changed files with 18 additions and 46 deletions
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4
doc/APIchanges
View File

@ -15,6 +15,10 @@ libavutil: 2012-10-22
API changes, most recent first:
2014-04-xx - xxxxxxx - lavu 53.10.0 - replaygain.h
Full scale for peak values is now 100000 (instead of UINT32_MAX) and values
may overflow.
2014-04-xx - xxxxxxx - lavu 53.09.0 - log.h
Add AV_LOG(c) macro to have 256 color debug messages.

54
libavformat/replaygain.c
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@ -35,7 +35,7 @@
#include "avformat.h"
#include "replaygain.h"
static int32_t parse_gain(const char *gain)
static int32_t parse_value(const char *value, int32_t min)
{
char *fraction;
int scale = 10000;
@ -43,15 +43,15 @@ static int32_t parse_gain(const char *gain)
int sign = 1;
int db;
if (!gain)
return INT32_MIN;
if (!value)
return min;
gain += strspn(gain, " \t");
value += strspn(value, " \t");
if (*gain == '-')
if (*value == '-')
sign = -1;
db = strtol(gain, &fraction, 0);
db = strtol(value, &fraction, 0);
if (*fraction++ == '.') {
while (av_isdigit(*fraction) && scale) {
mb += scale * (*fraction - '0');
@ -61,43 +61,11 @@ static int32_t parse_gain(const char *gain)
}
if (abs(db) > (INT32_MAX - mb) / 100000)
return INT32_MIN;
return min;
return db * 100000 + sign * mb;
}
static uint32_t parse_peak(const uint8_t *peak)
{
int64_t val = 0;
int64_t scale = 1;
if (!peak)
return 0;
peak += strspn(peak, " \t");
if (peak[0] == '1' && peak[1] == '.')
return UINT32_MAX;
else if (!(peak[0] == '0' && peak[1] == '.'))
return 0;
peak += 2;
while (av_isdigit(*peak)) {
int digit = *peak - '0';
if (scale > INT64_MAX / 10)
break;
val = 10 * val + digit;
scale *= 10;
peak++;
}
return av_rescale(val, UINT32_MAX, scale);
}
static int replaygain_export(AVStream *st,
const uint8_t *track_gain, const uint8_t *track_peak,
const uint8_t *album_gain, const uint8_t *album_peak)
@ -107,10 +75,10 @@ static int replaygain_export(AVStream *st,
int32_t tg, ag;
uint32_t tp, ap;
tg = parse_gain(track_gain);
ag = parse_gain(album_gain);
tp = parse_peak(track_peak);
ap = parse_peak(album_peak);
tg = parse_value(track_gain, INT32_MIN);
ag = parse_value(album_gain, INT32_MIN);
tp = parse_value(track_peak, 0);
ap = parse_value(album_peak, 0);
if (tg == INT32_MIN && ag == INT32_MIN)
return 0;

4
libavutil/replaygain.h
View File

@ -34,8 +34,8 @@ typedef struct AVReplayGain {
*/
int32_t track_gain;
/**
* Peak track amplitude, with UINT32_MAX representing full scale. 0 when
* unknown.
* Peak track amplitude, with 100000 representing full scale (but values
* may overflow). 0 when unknown.
*/
uint32_t track_peak;
/**

2
libavutil/version.h
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@ -56,7 +56,7 @@
*/
#define LIBAVUTIL_VERSION_MAJOR 52
#define LIBAVUTIL_VERSION_MINOR 73
#define LIBAVUTIL_VERSION_MINOR 74
#define LIBAVUTIL_VERSION_MICRO 100
#define LIBAVUTIL_VERSION_INT AV_VERSION_INT(LIBAVUTIL_VERSION_MAJOR, \