* Move DSP_CALLBACK_* enum to sound.h

 * Add software based volume control for a certain range (SW_VOLUME_MIN -> SW_VOLUME_MAX)
 * Make Onda VX747 use it
 * Don't change volume or frequency in Ingenic Jz4740 codec driver when they're already set


git-svn-id: svn://svn.rockbox.org/rockbox/trunk@22106 a1c6a512-1295-4272-9138-f99709370657

2 files changed, 14 insertions, 8 deletions

diff --git a/apps/dsp.c b/apps/dsp.c
index ec59417621..f9b94e8228 100644
--- a/apps/dsp.c
+++ b/apps/dsp.c
@@ -890,6 +890,15 @@ static void set_gain(struct dsp_config *dsp)
             (long) (((int64_t) dsp->data.gain * eq_precut) >> 24);
     }
 
+#ifdef HAVE_SW_VOLUME_CONTROL
+    if (global_settings.volume < SW_VOLUME_MAX ||
+        global_settings.volume > SW_VOLUME_MIN)
+    {
+        int vol_gain = get_replaygain_int(global_settings.volume * 100);
+        dsp->data.gain = (long) (((int64_t) dsp->data.gain * vol_gain) >> 24);
+    }
+#endif
+
     if (dsp->data.gain == DEFAULT_GAIN)
     {
         dsp->data.gain = 0;
@@ -1149,6 +1158,11 @@ int dsp_callback(int msg, intptr_t param)
     case DSP_CALLBACK_SET_TREBLE:
         treble = param;
         break;
+#ifdef HAVE_SW_VOLUME_CONTROL
+    case DSP_CALLBACK_SET_SW_VOLUME:
+        set_gain(&AUDIO_DSP);
+        break;
+#endif
 #endif
     case DSP_CALLBACK_SET_CHANNEL_CONFIG:
         dsp_set_channel_config(param);
diff --git a/apps/dsp.h b/apps/dsp.h
index 7d1e2b3ddc..58a5edb5e2 100644
--- a/apps/dsp.h
+++ b/apps/dsp.h
@@ -56,14 +56,6 @@ enum
     DSP_CROSSFEED
 };
 
-enum {
-    DSP_CALLBACK_SET_PRESCALE = 0,
-    DSP_CALLBACK_SET_BASS,
-    DSP_CALLBACK_SET_TREBLE,
-    DSP_CALLBACK_SET_CHANNEL_CONFIG,
-    DSP_CALLBACK_SET_STEREO_WIDTH
-};
-
 struct dsp_config;
 
 int dsp_process(struct dsp_config *dsp, char *dest,