Merge commit '8542f9c4f17125d483c40c0c5723842f1c982f81'

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

Conflicts:
	libavutil/version.h

Merged-by: Michael Niedermayer <michaelni@gmx.at>

doc/APIchanges

@@ -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.
 

libavformat/replaygain.c

@@ -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)
+    if (!value)
-        return INT32_MIN;
+        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);
+    tg = parse_value(track_gain, INT32_MIN);
-    ag = parse_gain(album_gain);
+    ag = parse_value(album_gain, INT32_MIN);
-    tp = parse_peak(track_peak);
+    tp = parse_value(track_peak, 0);
-    ap = parse_peak(album_peak);
+    ap = parse_value(album_peak, 0);
 
     if (tg == INT32_MIN && ag == INT32_MIN)
         return 0;

libavutil/replaygain.h

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

libavutil/version.h

@@ -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, \