From ea7992455a9704e2eb6bd6c9b39fabd111a7b997 Mon Sep 17 00:00:00 2001
From: Magnus Holmgren <magnushol@gmail.com>
Date: Wed, 15 Nov 2006 20:26:33 +0000
Subject: Make the updated %rg tag match playback behaviour (fall back to track
 gain if album gain requested but not available). Share the mode decision
 logic with playback code and simplify the %rg tag handling.

git-svn-id: svn://svn.rockbox.org/rockbox/trunk@11532 a1c6a512-1295-4272-9138-f99709370657
---
 apps/dsp.c             |  7 +++----
 apps/gui/gwps-common.c | 50 ++++++++++++++------------------------------------
 apps/misc.c            | 16 ++++++++++++++++
 apps/misc.h            |  8 ++++++++
 4 files changed, 41 insertions(+), 40 deletions(-)

diff --git a/apps/dsp.c b/apps/dsp.c
index 94e825c532..5627b05bca 100644
--- a/apps/dsp.c
+++ b/apps/dsp.c
@@ -26,6 +26,7 @@
 #include "system.h"
 #include "settings.h"
 #include "replaygain.h"
+#include "misc.h"
 #include "debug.h"
 
 #ifndef SIMULATOR
@@ -1093,10 +1094,8 @@ void dsp_set_replaygain(bool always)
 
         if (global_settings.replaygain || global_settings.replaygain_noclip)
         {
-            bool track_mode
-                = ((global_settings.replaygain_type == REPLAYGAIN_TRACK)
-                    || ((global_settings.replaygain_type == REPLAYGAIN_SHUFFLE)
-                        && global_settings.playlist_shuffle));
+            bool track_mode = get_replaygain_mode(dsp->track_gain != 0,
+                dsp->album_gain != 0) == REPLAYGAIN_TRACK;
             long peak = (track_mode || !dsp->album_peak)
                 ? dsp->track_peak : dsp->album_peak;
 
diff --git a/apps/gui/gwps-common.c b/apps/gui/gwps-common.c
index 2e7b7ef09c..7e795ffd96 100644
--- a/apps/gui/gwps-common.c
+++ b/apps/gui/gwps-common.c
@@ -941,46 +941,24 @@ static char* get_tag(struct wps_data* wps_data,
                         *intval = 1; /* off */
                     else
                     {
-                        switch (global_settings.replaygain_type)
-                        {
-                            case REPLAYGAIN_TRACK: /* track */
-                                if (id3->track_gain_string == NULL)
-                                    *intval = 6; /* no tag */
-                                else
-                                    *intval = 2;
-                                break;
-                            case REPLAYGAIN_ALBUM: /* album */
-                                if (id3->album_gain_string == NULL)
-                                    *intval = 6; /* no tag */
-                                else
-                                    *intval = 3;
-                                break;
-                            case REPLAYGAIN_SHUFFLE: /* shuffle */
-                                if (global_settings.playlist_shuffle)
-                                {
-                                    if (id3->track_gain_string == NULL)
-                                        *intval = 6;  /* no tag */
-                                    else
-                                        *intval = 4; /* shuffle track */
-                                }
-                                else
-                                {
-                                    if (id3->album_gain_string == NULL)
-                                        *intval = 6;  /* no tag */
-                                    else
-                                        *intval = 5; /* shuffle album */
-                                }
-                                break;
-                            default:
-                                *intval = 1; /* shoudn't happen, treat as off */
-                                break;
-                        } /* switch - replay gain type */
-                    }  /* if - replay gain set */
+                        int type = get_replaygain_mode(
+                            id3->track_gain_string != NULL,
+                            id3->album_gain_string != NULL);
+                        
+                        if (type < 0)
+                            *intval = 6;    /* no tag */
+                        else
+                            *intval = type + 2;
+                            
+                        if (global_settings.replaygain_type == REPLAYGAIN_SHUFFLE)
+                            *intval += 2;
+                    }
+
                     switch (*intval)
                     {
                         case 1:
                         case 6:
-                            strncpy(buf, "+0.00 dB", buf_size);
+                            return "+0.00 dB";
                             break;
                         case 2:
                         case 4:
diff --git a/apps/misc.c b/apps/misc.c
index 80c4588f0f..709bc49208 100644
--- a/apps/misc.c
+++ b/apps/misc.c
@@ -802,3 +802,19 @@ int show_logo( void )
 
     return 0;
 }
+
+#if CONFIG_CODEC == SWCODEC
+int get_replaygain_mode(bool have_track_gain, bool have_album_gain)
+{
+    int type;
+
+    bool track = ((global_settings.replaygain_type == REPLAYGAIN_TRACK)
+        || ((global_settings.replaygain_type == REPLAYGAIN_SHUFFLE)
+            && global_settings.playlist_shuffle));
+
+    type = (!track && have_album_gain) ? REPLAYGAIN_ALBUM 
+        : have_track_gain ? REPLAYGAIN_TRACK : -1;
+    
+    return type;
+}
+#endif
diff --git a/apps/misc.h b/apps/misc.h
index 6c660e0a5e..f273631030 100644
--- a/apps/misc.h
+++ b/apps/misc.h
@@ -82,4 +82,12 @@ long default_event_handler(long event);
 void car_adapter_mode_init(void);
 extern int show_logo(void);
 
+#if CONFIG_CODEC == SWCODEC
+/* Return current ReplayGain mode a file should have (REPLAYGAIN_TRACK or
+ * REPLAYGAIN_ALBUM) if ReplayGain processing is enabled, or -1 if no
+ * information present.
+ */
+int get_replaygain_mode(bool have_track_gain, bool have_album_gain);
+#endif
+
 #endif /* MISC_H */
-- 
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