From 5ff119a56ce4dd34a8268fdc9048fc50c881206d Mon Sep 17 00:00:00 2001
From: drowe67 <drowe67@01035d8c-6547-0410-b346-abe4f91aad63>
Date: Tue, 21 Oct 2014 19:54:17 +0000
Subject: [PATCH] patch from Alfred to support floats on demod input for FreeDV
 API

git-svn-id: https://svn.code.sf.net/p/freetel/code@1905 01035d8c-6547-0410-b346-abe4f91aad63
---
 codec2-dev/src/freedv_api.c | 18 +++++++++++++++++-
 codec2-dev/src/freedv_api.h |  1 +
 2 files changed, 18 insertions(+), 1 deletion(-)

diff --git a/codec2-dev/src/freedv_api.c b/codec2-dev/src/freedv_api.c
index c20f5709..db3f72f1 100644
--- a/codec2-dev/src/freedv_api.c
+++ b/codec2-dev/src/freedv_api.c
@@ -284,7 +284,23 @@ int freedv_nin(struct freedv *f) {
 
 \*---------------------------------------------------------------------------*/
 
+// short version
+
 int freedv_rx(struct freedv *f, short speech_out[], short demod_in[]) {
+
+float rxdata[FDMDV_MAX_SAMPLES_PER_FRAME];
+int i;
+
+    for(i=0; i<f->nin; i++)  rxdata[i] = (float)demod_in[i]/FDMDV_SCALE;
+
+    return freedv_floatrx(f, speech_out, rxdata);
+    
+}
+
+
+// float version
+
+int freedv_floatrx(struct freedv *f, short speech_out[], float demod_in[]) {
     COMP                rx_fdm[FDMDV_MAX_SAMPLES_PER_FRAME];
     int                 bits_per_codec_frame, bytes_per_codec_frame, bits_per_fdmdv_frame;
     int                 reliable_sync_bit, i, j, bit, byte, nin_prev, nout;
@@ -297,7 +313,7 @@ int freedv_rx(struct freedv *f, short speech_out[], short demod_in[]) {
     bits_per_fdmdv_frame  = fdmdv_bits_per_frame(f->fdmdv);
 
     for(i=0; i<f->nin; i++) {
-        rx_fdm[i].real = (float)demod_in[i]/FDMDV_SCALE;
+        rx_fdm[i].real = demod_in[i];
         rx_fdm[i].imag = 0;
     }
 
diff --git a/codec2-dev/src/freedv_api.h b/codec2-dev/src/freedv_api.h
index 909340e2..77a5e3d7 100644
--- a/codec2-dev/src/freedv_api.h
+++ b/codec2-dev/src/freedv_api.h
@@ -74,5 +74,6 @@ void freedv_close(struct freedv *freedv);
 void freedv_tx(struct freedv *f, short mod_out[], short speech_in[]);
 int freedv_nin(struct freedv *f);
 int freedv_rx(struct freedv *f, short speech_out[], short demod_in[]);
+int freedv_floatrx(struct freedv *f, short speech_out[], float demod_in[]);
 
 #endif
-- 
2.25.1