#include "libavutil/replaygain.h"
#include "avformat.h"
+#include "internal.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;
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');
}
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)
+int ff_replaygain_export_raw(AVStream *st, int32_t tg, uint32_t tp,
+ int32_t ag, uint32_t ap)
{
- 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)
-{
- AVPacketSideData *sd, *tmp;
AVReplayGain *replaygain;
- uint8_t *data;
- 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);
if (tg == INT32_MIN && ag == INT32_MIN)
return 0;
- replaygain = av_mallocz(sizeof(*replaygain));
+ replaygain = (AVReplayGain*)av_stream_new_side_data(st, AV_PKT_DATA_REPLAYGAIN,
+ sizeof(*replaygain));
if (!replaygain)
return AVERROR(ENOMEM);
- tmp = av_realloc_array(st->side_data, st->nb_side_data + 1, sizeof(*tmp));
- if (!tmp) {
- av_freep(&replaygain);
- return AVERROR(ENOMEM);
- }
- st->side_data = tmp;
- st->nb_side_data++;
-
- sd = &st->side_data[st->nb_side_data - 1];
- sd->type = AV_PKT_DATA_REPLAYGAIN;
- sd->data = (uint8_t*)replaygain;
- sd->size = sizeof(*replaygain);
-
replaygain->track_gain = tg;
replaygain->track_peak = tp;
replaygain->album_gain = ag;
ag = av_dict_get(metadata, "REPLAYGAIN_ALBUM_GAIN", NULL, 0);
ap = av_dict_get(metadata, "REPLAYGAIN_ALBUM_PEAK", NULL, 0);
- return replaygain_export(st,
- tg ? tg->value : NULL,
- tp ? tp->value : NULL,
- ag ? ag->value : NULL,
- ap ? ap->value : NULL);
+ return ff_replaygain_export_raw(st,
+ parse_value(tg ? tg->value : NULL, INT32_MIN),
+ parse_value(tp ? tp->value : NULL, 0),
+ parse_value(ag ? ag->value : NULL, INT32_MIN),
+ parse_value(ap ? ap->value : NULL, 0));
}