From 621bcc22940aed0242ed1795491a400521d2394d Mon Sep 17 00:00:00 2001
From: Linus Nielsen Feltzing <linus@haxx.se>
Date: Sat, 4 Feb 2006 23:15:15 +0000
Subject: The simulator should use the keypad period key, not the regular one

git-svn-id: svn://svn.rockbox.org/rockbox/trunk@8568 a1c6a512-1295-4272-9138-f99709370657
---
 apps/dsp.c | 58 ++++++++++++++++++++++++++++++++++++++++++++++++++++++++--
 1 file changed, 56 insertions(+), 2 deletions(-)

(limited to 'apps/dsp.c')

diff --git a/apps/dsp.c b/apps/dsp.c
index 789cf72b20..f403674ba2 100644
--- a/apps/dsp.c
+++ b/apps/dsp.c
@@ -145,6 +145,7 @@ struct dsp_config
     bool dither_enabled;
     bool new_gain;
     bool crossfeed_enabled;
+    bool eq_enabled;
 };
 
 struct resample_data
@@ -618,6 +619,52 @@ static void apply_crossfeed(long* src[], int count)
 }
 #endif
 
+#define EQ_CUTOFF_USER2REAL(x) (0xffffffff / dsp->frequency * (x))
+#define EQ_Q_USER2REAL(x) (((x) << 16) / 10)
+#define EQ_GAIN_USER2REAL(x) (((x) << 16) / 10)
+
+/* Synchronize the EQ filters with the global settings */
+static void eq_update_data()
+{
+    int i;
+    int *setting;
+    int gain, cutoff, q, maxgain;
+    
+    /* Don't do anything if we're not playing */
+    if (dsp->frequency == 0)
+        return;
+    
+    setting = &global_settings.eq_band0_cutoff;
+    maxgain = 0;
+    
+    /* Iterate over each band and update the appropriate filter */
+    for(i = 0; i < 5; i++) {
+        cutoff = *setting++;
+        q = *setting++;
+        gain = *setting++;
+
+        /* Keep track of maxgain for the pre-amp */
+        if (gain > maxgain)
+            maxgain = gain;
+
+        if (gain == 0) {
+            eq_data.enabled[i] = 0;
+        } else {
+            if (i == 0)
+                eq_ls_coefs(EQ_CUTOFF_USER2REAL(cutoff), EQ_Q_USER2REAL(q),
+                    EQ_GAIN_USER2REAL(gain), eq_data.filters[0].coefs);
+            else if (i == 4)
+                eq_hs_coefs(EQ_CUTOFF_USER2REAL(cutoff), EQ_Q_USER2REAL(q),
+                    EQ_GAIN_USER2REAL(gain), eq_data.filters[4].coefs);
+            else
+                eq_pk_coefs(EQ_CUTOFF_USER2REAL(cutoff), EQ_Q_USER2REAL(q),
+                    EQ_GAIN_USER2REAL(gain), eq_data.filters[i].coefs);
+
+            eq_data.enabled[i] = 1;
+        }
+    }
+}
+
 /* Apply EQ filters to those bands that have got it switched on. */
 static void eq_process(long **x, unsigned num)
 {
@@ -737,6 +784,9 @@ long dsp_process(char* dst, char* src[], long size)
     size /= dsp->sample_bytes * factor;
     dsp_set_replaygain(false);
 
+    if (dsp->eq_enabled)
+        eq_update_data();
+
     while (size > 0)
     {
         samples = convert_to_internal(src, size, tmp);
@@ -745,8 +795,7 @@ long dsp_process(char* dst, char* src[], long size)
         samples = resample(tmp, samples);
         if (dsp->crossfeed_enabled && dsp->stereo_mode != STEREO_MONO)
             apply_crossfeed(tmp, samples);
-        /* TODO: Might want to wrap this with a generic eq_enabled when the
-           settings are in place */
+        if (dsp->eq_enabled)
         eq_process(tmp, samples);
         write_samples((short*) dst, tmp, samples);
         written += samples;
@@ -943,6 +992,11 @@ bool dsp_configure(int setting, void *value)
     return 1;
 }
 
+void dsp_set_eq(bool enable)
+{
+    dsp->eq_enabled = enable;
+}
+
 void dsp_set_crossfeed(bool enable)
 {
     if (enable)
-- 
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