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opusenc: Add gain setting options #73

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9 changes: 9 additions & 0 deletions man/opusenc.1
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Original file line number Diff line number Diff line change
Expand Up @@ -114,6 +114,9 @@ to mono after decoding.
.TP
.BI --max-delay " N"
Set maximum container delay in milliseconds (0\(en1000, default: 1000).
.TP
.BI --output-gain " N"
Set the output gain in LUFS normalized around -23 LUFS
.SS "Metadata options"
.TP
.BI --title " TITLE"
Expand Down Expand Up @@ -286,6 +289,12 @@ Don't propagate metadata tags from the input file.
.TP
.B --discard-pictures
Don't propagate pictures or art from the input file.
.TP
.BI --track-gain " N"
Set the track gain in LUFS.
.TP
.BI --album-gain " N"
Set the album gain in LUFS. If track gain is specified, this option is ignored.
.SS "Input options"
.TP
.B --raw
Expand Down
57 changes: 57 additions & 0 deletions src/opusenc.c
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Expand Up @@ -154,6 +154,7 @@ static void usage(void)
#endif
printf(" --max-delay n Set maximum container delay in milliseconds\n");
printf(" (0-1000, default: 1000)\n");
printf(" --output-gain n.nnn Set the output gain in LUFS\n");
printf("\nMetadata options:\n");
printf(" --title title Set track title\n");
printf(" --artist artist Set artist or author, may be used multiple times\n");
Expand All @@ -168,6 +169,8 @@ static void usage(void)
printf(" --padding n Reserve n extra bytes for metadata (default: 512)\n");
printf(" --discard-comments Don't keep metadata when transcoding\n");
printf(" --discard-pictures Don't keep pictures when transcoding\n");
printf(" --track-gain n.nnn Set the track gain in LUFS\n");
printf(" --album-gain n.nnn Set the album gain in LUFS\n");
printf("\nInput options:\n");
printf(" --raw Interpret input as raw PCM data without headers\n");
printf(" --raw-float Interpret input as raw float data without headers\n");
Expand Down Expand Up @@ -407,6 +410,9 @@ int main(int argc, char **argv)
{"padding", required_argument, NULL, 0},
{"discard-comments", no_argument, NULL, 0},
{"discard-pictures", no_argument, NULL, 0},
{"output-gain", required_argument, NULL, 0},
{"track-gain", required_argument, NULL, 0},
{"album-gain", required_argument, NULL, 0},
{0, 0, 0, 0}
};
int i, ret;
Expand Down Expand Up @@ -452,6 +458,12 @@ int main(int argc, char **argv)
int serialno;
opus_int32 lookahead=0;
int mapping_family;
int set_output_gain=0;
double output_gain=0;
int set_track_gain=0;
double track_gain=0;
int set_album_gain=0;
double album_gain=0;
#ifdef WIN_UNICODE
int argc_utf8;
char **argv_utf8;
Expand Down Expand Up @@ -781,6 +793,30 @@ int main(int argc, char **argv)
inopt.copy_pictures=0;
} else if (strcmp(optname, "discard-pictures")==0) {
inopt.copy_pictures=0;
} else if (strcmp(optname, "output-gain")==0) {
char* end;
output_gain=strtod(optarg, &end);
set_output_gain=1;
if(end==optarg) {
fatal("Error: output gain must be decimal\n");
}
save_cmd=0;
} else if(strcmp(optname, "track-gain")==0) {
char* end;
track_gain=strtod(optarg, &end);
set_track_gain=1;
if(end==optarg) {
fatal("Error: track gain must be decimal\n");
}
save_cmd=0;
} else if(strcmp(optname, "album-gain")==0) {
char* end;
album_gain=strtod(optarg, &end);
set_album_gain=1;
if(end==optarg) {
fatal("Error: album gain must be decimal\n");
}
save_cmd=0;
}
/*Options whose arguments would leak file paths or just end up as
metadata, or that relate only to input file handling or console
Expand Down Expand Up @@ -908,6 +944,27 @@ int main(int argc, char **argv)
mapping_family=chan>8?255:chan>2;
}

if (set_output_gain) {
double gain = output_gain*256+0.5;
inopt.gain=gain<-32768?-32768:gain<32767?(int)floor(gain):32767;
}

if (set_track_gain) {
char track_gain_buf[7];
int track_gain_val;
double gain=256*track_gain+0.5;
track_gain_val=gain<-32768?-32768:gain<32767?(int)floor(gain):32767;
sprintf(track_gain_buf,"%i",track_gain_val);
ope_comments_add(inopt.comments, "R128_TRACK_GAIN",track_gain_buf);
} else if(set_album_gain) {
char album_gain_buf[7];
int album_gain_val;
double gain=256*album_gain+0.5;
album_gain_val=gain<-32768?-32768:gain<32767?(int)floor(gain):32767;
sprintf(album_gain_buf,"%i",album_gain_val);
ope_comments_add(inopt.comments, "R128_ALBUM_GAIN",album_gain_buf);
}

/*Initialize Opus encoder*/
enc = ope_encoder_create_callbacks(&callbacks, &data, inopt.comments, rate,
chan, mapping_family, &ret);
Expand Down