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authorandreas128 <Andreas>2017-03-16 00:00:30 +0000
committerandreas128 <Andreas>2017-03-16 00:00:30 +0000
commit82b3ca9e4ff05298438226957274ac7cd56f17f9 (patch)
tree352ec6fd6051da3fb597f870bc25947642b00d7d /src/DabMod.cpp
parent0a88998e2e183ac62aa3858a17a28ce0303a9780 (diff)
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Add normalisation for file output
Diffstat (limited to 'src/DabMod.cpp')
-rw-r--r--src/DabMod.cpp14
1 files changed, 14 insertions, 0 deletions
diff --git a/src/DabMod.cpp b/src/DabMod.cpp
index 7fc395e..4fedac4 100644
--- a/src/DabMod.cpp
+++ b/src/DabMod.cpp
@@ -81,6 +81,11 @@
*/
static const float normalise_factor = 50000.0f;
+//Empirical normalisation factors used to normalise the samples to amplitude 1.
+static const float normalise_factor_file_fix = 81000.0f;
+static const float normalise_factor_file_var = 46000.0f;
+static const float normalise_factor_file_max = 46000.0f;
+
typedef std::complex<float> complexf;
using namespace std;
@@ -183,6 +188,15 @@ static shared_ptr<ModOutput> prepare_output(
if (s.fileOutputFormat == "complexf") {
output = make_shared<OutputFile>(s.outputName);
}
+ if (s.fileOutputFormat == "complexf_normalised") {
+ if (s.gainMode == GainMode::GAIN_FIX)
+ s.normalise = 1.0 / normalise_factor_file_fix;
+ else if (s.gainMode == GainMode::GAIN_MAX)
+ s.normalise = 1.0 / normalise_factor_file_max;
+ else if (s.gainMode == GainMode::GAIN_VAR)
+ s.normalise = 1.0 / normalise_factor_file_var;
+ output = make_shared<OutputFile>(s.outputName);
+ }
else if (s.fileOutputFormat == "s8") {
// We must normalise the samples to the interval [-127.0; 127.0]
s.normalise = 127.0f / normalise_factor;