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Volume for rbspeexenc.

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espeak's output is rather loud, and I used to rely on lame's --scale option.
So here's a simple volume knob (amplitude multiplier) for rbspeexenc. I
use a factor 0.6.


git-svn-id: svn://svn.rockbox.org/rockbox/trunk@15832 a1c6a512-1295-4272-9138-f99709370657
This commit is contained in:
Stéphane Doyon 2007-11-27 03:13:02 +00:00
parent 00d0a3a661
commit a43c5c10c8
1 changed files with 10 additions and 0 deletions
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10
tools/rbspeex/rbspeexenc.c
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@ -30,6 +30,7 @@
" -c x Complexity, increases quality for a given bitrate, but encodes\n"\ " -c x Complexity, increases quality for a given bitrate, but encodes\n"\
" slower, range [0-10], default 3\n"\ " slower, range [0-10], default 3\n"\
" -n Enable narrowband mode, will resample input to 8 kHz\n\n"\ " -n Enable narrowband mode, will resample input to 8 kHz\n\n"\
" -v x Volume, amplitude multiplier, default 1.0.\n"\
"rbspeexenc expects a mono 16 bit WAV file as input. Files will be resampled\n"\ "rbspeexenc expects a mono 16 bit WAV file as input. Files will be resampled\n"\
"to either 16 kHz by default, or 8 kHz if narrowband mode is enabled.\n"\ "to either 16 kHz by default, or 8 kHz if narrowband mode is enabled.\n"\
"WARNING: This tool will create files that are only usable by Rockbox!\n" "WARNING: This tool will create files that are only usable by Rockbox!\n"
@ -124,6 +125,7 @@ int main(int argc, char **argv)
int complexity = 3; int complexity = 3;
float quality = 8.f; float quality = 8.f;
bool narrowband = false; bool narrowband = false;
float volume = 1.0f;
int target_sr; int target_sr;
int numchan, bps, sr, numsamples; int numchan, bps, sr, numsamples;
int frame_size; int frame_size;
@ -140,6 +142,8 @@ int main(int argc, char **argv)
quality = atof(argv[++i]); quality = atof(argv[++i]);
else if (strncmp(argv[i], "-c", 2) == 0) else if (strncmp(argv[i], "-c", 2) == 0)
complexity = atoi(argv[++i]); complexity = atoi(argv[++i]);
else if (strncmp(argv[i], "-v", 2) == 0)
volume = atof(argv[++i]);
else if (strncmp(argv[i], "-n", 2) == 0) else if (strncmp(argv[i], "-n", 2) == 0)
narrowband = true; narrowband = true;
++i; ++i;
@ -193,6 +197,12 @@ int main(int argc, char **argv)
} }
fread(in, 2, numsamples, fin); fread(in, 2, numsamples, fin);
fclose(fin); fclose(fin);
if(volume != 1.0f) {
for(i=0; i<numsamples; i++)
in[i] *= volume;
}
/* There will be 'lookahead' samples of zero at the end of the array, to /* There will be 'lookahead' samples of zero at the end of the array, to
* make sure the Speex encoder is allowed to spit out all its data at clip * make sure the Speex encoder is allowed to spit out all its data at clip
* end */ * end */