use 16bit agc for freedv and dsd modes, refs #126

csdr/csdr.py

@@ -212,8 +212,11 @@ class dsp(object):
                     chain += ["dsd -fd -i - -o - -u {unvoiced_quality} -g -1 "]
                 elif which == "nxdn":
                     chain += ["dsd -fi -i - -o - -u {unvoiced_quality} -g -1 "]
-                chain += ["CSDR_FIXED_BUFSIZE=32 csdr convert_s16_f"]
-                max_gain = 50
+                chain += [
+                    "digitalvoice_filter",
+                    "CSDR_FIXED_BUFSIZE=32 csdr agc_s16 --max 50 --initial 5",
+                    "sox -t raw -r 8000 -e signed-integer -b 16 -c 1 --buffer 32 - -t raw -r {output_rate} -e signed-integer -b 16 -c 1 - ",
+                ]
             # digiham modes
             else:
                 chain += ["rrc_filter", "gfsk_demodulator"]
@@ -227,7 +230,7 @@ class dsp(object):
                 max_gain = 0.005
                 chain += [
                     "digitalvoice_filter -f",
-                "CSDR_FIXED_BUFSIZE=32 csdr agc_ff --max {max_gain} --initial {initial_gain}".format(max_gain=max_gain, initial_gain=max_gain / 10),
+                    "CSDR_FIXED_BUFSIZE=32 csdr agc_ff --max 0.005 --initial 0.0005",
                     "sox -t raw -r 8000 -e floating-point -b 32 -c 1 --buffer 32 - -t raw -r {output_rate} -e signed-integer -b 16 -c 1 - ",
                 ]
         elif which == "am":
@@ -245,6 +248,7 @@ class dsp(object):
                 "csdr agc_ff",
                 "csdr convert_f_s16",
                 "freedv_rx 1600 - -",
+                "csdr agc_s16",
                 "sox -t raw -r 8000 -e signed-integer -b 16 -c 1 --buffer 32 - -t raw -r {output_rate} -e signed-integer -b 16 -c 1 - ",
             ]
         elif which == "ssb":

docker/scripts/install-dependencies.sh

@@ -54,8 +54,8 @@ cmakebuild itpp bb5c7e95f40e8fdb5c3f3d01a84bcbaf76f3676d
 
 git clone https://github.com/jketterl/csdr.git
 cd csdr
-# develop as of 2020-08-26, includes agc rework
-git checkout a308c6b369d3eb47242e644c0c41dd27c6a4ec47
+# develop as of 2020-08-27
+git checkout 3ebba68e956379c6e906e48777fbdcd950839d80
 autoreconf -i
 ./configure
 make