From fd295a7acf9d05e9b85349bd1dcadc3fdcfa6b5f Mon Sep 17 00:00:00 2001
From: Kuba <132459354+KubaPro010@users.noreply.github.com>
Date: Wed, 15 Nov 2023 17:59:38 +0000
Subject: [PATCH] ima implement some stereo tool function

---
 src/pifmrds/fm_mpx.c      | 4 ++--
 src/pifmrds/fm_mpx.h      | 2 +-
 src/pifmrds/pi_fm_rds.cpp | 2 +-
 3 files changed, 4 insertions(+), 4 deletions(-)

diff --git a/src/pifmrds/fm_mpx.c b/src/pifmrds/fm_mpx.c
index 85a39d8..be6042a 100644
--- a/src/pifmrds/fm_mpx.c
+++ b/src/pifmrds/fm_mpx.c
@@ -193,7 +193,7 @@ int fm_mpx_open(char *filename, size_t len, int raw, double preemphasis, int raw
 
 // samples provided by this function are in 0..10: they need to be divided by
 // 10 after.
-int fm_mpx_get_samples(float *mpx_buffer, int drds, float compressor_decay, float compressor_attack, float compressor_max_gain_recip, int disablestereo, float gain, int enablecompressor, int rds_ct_enabled, float rds_volume, int paused) {
+int fm_mpx_get_samples(float *mpx_buffer, int drds, float compressor_decay, float compressor_attack, float compressor_max_gain_recip, int disablestereo, float gain, int enablecompressor, int rds_ct_enabled, float rds_volume, int paused, float pilot_volume) {
     int stereo_capable = (channels > 1) && (!disablestereo); //chatgpt
     if(!drds) get_rds_samples(mpx_buffer, length, stereo_capable, rds_ct_enabled, rds_volume);
 
@@ -321,7 +321,7 @@ int fm_mpx_get_samples(float *mpx_buffer, int drds, float compressor_decay, floa
             if(!disablestereo) {
                 mpx_buffer[i] +=  4.05*(out_left+out_right) + // Stereo sum signal
                     4.05 * carrier_38[phase_38] * (out_left-out_right) + // Stereo difference signal
-                    .9*carrier_19[phase_19];                  // Stereo pilot tone
+                    (pilot_volume-0.1)*carrier_19[phase_19];                  // Stereo pilot tone (doing 0.1 minus to balance it out, as by default its 0.9, but to make the 1.0 the normal value of the volume)
 
                 phase_19++;
                 phase_38++;
diff --git a/src/pifmrds/fm_mpx.h b/src/pifmrds/fm_mpx.h
index 8407eb8..155f07c 100644
--- a/src/pifmrds/fm_mpx.h
+++ b/src/pifmrds/fm_mpx.h
@@ -22,5 +22,5 @@
 */
 
 extern int fm_mpx_open(char *filename, size_t len, int raw, double preemphasis, int rawSampleRate, int rawChannels, float cutoff_freq);
-extern int fm_mpx_get_samples(float *mpx_buffer, int drds, float compressor_decay, float compressor_attack, float compressor_max_gain_recip, int disablestereo, float gain, int enablecompressor, int rds_ct_enabled, float rds_volume, int paused);
+extern int fm_mpx_get_samples(float *mpx_buffer, int drds, float compressor_decay, float compressor_attack, float compressor_max_gain_recip, int disablestereo, float gain, int enablecompressor, int rds_ct_enabled, float rds_volume, int paused, float pilot_volume);
 extern int fm_mpx_close();
diff --git a/src/pifmrds/pi_fm_rds.cpp b/src/pifmrds/pi_fm_rds.cpp
index 61f3825..c6fcaf2 100644
--- a/src/pifmrds/pi_fm_rds.cpp
+++ b/src/pifmrds/pi_fm_rds.cpp
@@ -226,7 +226,7 @@ int tx(uint32_t carrier_freq, char *audio_file, uint16_t pi, char *ps, char *rt,
             }
         }
 
-			if( fm_mpx_get_samples(data, drds, compressor_decay, compressor_attack, compressor_max_gain_recip, disablestereo, gaim, enablecompressor, rds_ct_enabled, rds_volume, paused) < 0 ) {
+			if( fm_mpx_get_samples(data, drds, compressor_decay, compressor_attack, compressor_max_gain_recip, disablestereo, gaim, enablecompressor, rds_ct_enabled, rds_volume, paused, 1.0) < 0 ) {
                     terminate(0);
                 }
                 data_len = DATA_SIZE;