It's now possible to select the crossfading mode: "Off, Crossfade,

Mix". If set to mix, no fading is applied but tracks are mixed up.


git-svn-id: svn://svn.rockbox.org/rockbox/trunk@7224 a1c6a512-1295-4272-9138-f99709370657

apps/lang/english.lang

@@ -3166,3 +3166,15 @@ desc: in set_rating
 eng: "Rating:"
 voice "Rating"
 new:
+
+id: LANG_CROSSFADE_DURATION
+desc: in playback settings
+eng: "Crossfade duration"
+voice: "Crossfade duration"
+new:
+
+id: LANG_MIX
+desc: in playback settings, crossfade option
+eng: "Mix"
+voice: "Mix"
+new:

apps/pcmbuf.c

@@ -69,6 +69,7 @@ static bool boost_mode;
  */
 enum {
     CFM_CROSSFADE,
+    CFM_MIX,
     CFM_FLUSH
 };
 
@@ -221,7 +222,7 @@ bool pcmbuf_is_lowdata(void)
     return false;
 }
 
-bool pcmbuf_crossfade_init(void)
+bool pcmbuf_crossfade_init(int type)
 {
     if (pcmbuf_size - audiobuffer_free < CHUNK_SIZE * 8 || !crossfade_enabled
         || crossfade_active || crossfade_init) {
@@ -230,7 +231,18 @@ bool pcmbuf_crossfade_init(void)
     }
     logf("pcmbuf_crossfade_init");
     pcmbuf_boost(true);
-    crossfade_mode = CFM_CROSSFADE;
+
+    switch (type) {
+    case CROSSFADE_MODE_CROSSFADE:
+        crossfade_mode = CFM_CROSSFADE;
+        break;
+    case CROSSFADE_MODE_MIX:
+        crossfade_mode = CFM_MIX;
+        break;
+    default:
+        return false;
+    }
+        
     crossfade_init = true;
     
     return true;
@@ -330,6 +342,7 @@ static void crossfade_start(void)
     crossfade_pos = audiobuffer_pos;
 
     switch (crossfade_mode) {
+        case CFM_MIX:
         case CFM_CROSSFADE:
             crossfade_amount = (bytesleft - (CHUNK_SIZE * 2))/2;
             crossfade_rem = crossfade_amount;
@@ -354,6 +367,15 @@ int crossfade(short *buf, const short *buf2, int length)
     
     size = MIN(length, crossfade_rem);
     switch (crossfade_mode) {
+        /* Mix two streams. */
+        case CFM_MIX:
+            /* Bias & add & clip. */
+            for (i = 0; i < size; i++) {
+                buf[i] = MIN(MAX(buf[i] + buf2[i], -32768), 32767);
+            }
+            break ;
+
+        /* Fade two streams. */
         case CFM_CROSSFADE:
             val1 = (crossfade_rem<<10)/crossfade_amount;
             val2 = ((crossfade_amount-crossfade_rem)<<10)/crossfade_amount;
@@ -363,6 +385,7 @@ int crossfade(short *buf, const short *buf2, int length)
             }
             break ;
 
+        /* Join two streams. */
         case CFM_FLUSH:
             for (i = 0; i < size; i++) {
                 buf[i] = buf2[i];

apps/pcmbuf.h

@@ -36,7 +36,7 @@ void pcmbuf_set_watermark(int numbytes, void (*callback)(int bytes_left));
 void pcmbuf_set_boost_mode(bool state);
 bool pcmbuf_is_lowdata(void);
 void pcmbuf_flush_audio(void);
-bool pcmbuf_crossfade_init(void);
+bool pcmbuf_crossfade_init(int type);
 void pcmbuf_add_event(void (*event_handler)(void));
 unsigned int pcmbuf_get_latency(void);
 bool pcmbuf_insert_buffer(char *buf, long length);

apps/playback.c

@@ -1175,7 +1175,8 @@ void audio_update_trackinfo(void)
     cur_ti->start_pos = 0;
     ci.taginfo_ready = (bool *)&cur_ti->taginfo_ready;
     if (pcmbuf_is_crossfade_enabled() && !pcmbuf_is_crossfade_active()) {
-        pcmbuf_crossfade_init();
+        pcmbuf_crossfade_init(new_track ? CROSSFADE_MODE_CROSSFADE
+                                : global_settings.crossfade);
         codec_track_changed();
     } else {
         pcmbuf_add_event(codec_track_changed);
@@ -1393,7 +1394,7 @@ void audio_thread(void)
                 ci.stop_codec = true;
                 ci.reload_codec = false;
                 ci.seek_time = 0;
-                pcmbuf_crossfade_init();
+                pcmbuf_crossfade_init(CROSSFADE_MODE_CROSSFADE);
                 while (codec_loaded)
                     yield();
                 audio_play_start((int)ev.data);
@@ -1771,18 +1772,21 @@ void audio_set_buffer_margin(int setting)
     set_filebuf_watermark(buffer_margin);
 }
 
-void audio_set_crossfade_amount(int seconds)
+/* Set crossfade & PCM buffer length. */
+void audio_set_crossfade(int type)
 {
     long size;
     bool was_playing = playing;
     int offset = 0;
+    int lookup[] = {1, 2, 4, 6, 8, 10, 12, 14};
+    int seconds = lookup[global_settings.crossfade_duration];
 
     /* Store the track resume position */
     if (playing)
         offset = cur_ti->id3.offset;
 
-    /* Multiply by two to get the real value (0s, 2s, 4s, ...) */
+    if (type == CROSSFADE_MODE_OFF)
-    seconds *= 2;
+        seconds = 0;
         
     /* Buffer has to be at least 2s long. */
     seconds += 2;

apps/settings.c

@@ -397,7 +397,7 @@ static const struct bit_entry hd_bits[] =
 #endif
 
 #if CONFIG_HWCODEC == MASNONE
-    {3, S_O(crossfade), 0, "crossfade", "off,2s,4s,6s,8s,10s,12s,14s"},
+    {3, S_O(crossfade_duration), 0, "crossfade duration", "1s,2s,4s,6s,8s,10s,12s,14s"},
 #endif
 
 #if CONFIG_BACKLIGHT == BL_IRIVER
@@ -414,6 +414,10 @@ static const struct bit_entry hd_bits[] =
     {1, S_O(next_folder), false, "move to next folder", off_on },
     {1, S_O(runtimedb), false, "gather runtime data", off_on },
 
+#if CONFIG_HWCODEC == MASNONE
+    {2, S_O(crossfade), 0, "crossfade type", "off,crossfade,mix"},
+#endif
+    
     /* new stuff to be added at the end */
             
     /* Sum of all bit sizes must not grow beyond 0xB8*8 = 1472 */
@@ -851,7 +855,7 @@ void settings_apply(void)
     }
 
 #if CONFIG_HWCODEC == MASNONE
-    audio_set_crossfade_amount(global_settings.crossfade);
+    audio_set_crossfade(global_settings.crossfade);
 #endif
 
 #ifdef HAVE_SPDIF_POWER

apps/settings.h

@@ -106,6 +106,10 @@
 #define TRIG_DURATION_COUNT 13
 extern char *trig_durations[TRIG_DURATION_COUNT];
 
+#define CROSSFADE_MODE_OFF       0
+#define CROSSFADE_MODE_CROSSFADE 1
+#define CROSSFADE_MODE_MIX       2
+
 /* These define "virtual pointers", which could either be a literal string,
    or a mean a string ID if the pointer is in a certain range.
    This helps to save space for menus and options. */
@@ -151,6 +155,7 @@ struct user_settings
 
 #if CONFIG_HWCODEC == MASNONE
     int crossfade;
+    int crossfade_duration;
 #endif
 
     int rec_quality;   /* 0-7 */

apps/settings_menu.c

@@ -1131,6 +1131,22 @@ static bool crossfade(void)
 {
     static const struct opt_items names[] = {
         { STR(LANG_OFF) },
+        { STR(LANG_CROSSFADE) },
+        { STR(LANG_MIX) },
+    };
+    bool ret;
+
+    ret = set_option( str(LANG_CROSSFADE),
+                     &global_settings.crossfade, INT, names, 3, NULL);
+    audio_set_crossfade(global_settings.crossfade);
+
+    return ret;
+}
+
+static bool crossfade_duration(void)
+{
+    static const struct opt_items names[] = {
+        { "1s", TALK_ID(1, UNIT_SEC) },
         { "2s", TALK_ID(2, UNIT_SEC) },
         { "4s", TALK_ID(4, UNIT_SEC) },
         { "6s", TALK_ID(6, UNIT_SEC) },
@@ -1140,13 +1156,12 @@ static bool crossfade(void)
         { "14s", TALK_ID(14, UNIT_SEC) },
     };
     bool ret;
-    ret=set_option( str(LANG_CROSSFADE), &global_settings.crossfade,
+    ret=set_option( str(LANG_CROSSFADE_DURATION),
-                   INT, names, 8, NULL);
+                    &global_settings.crossfade_duration, INT, names, 8, NULL);
-    audio_set_crossfade_amount(global_settings.crossfade);
+    audio_set_crossfade(global_settings.crossfade);
                    
     return ret;
 }
-
 #endif
 
 static bool next_folder(void)
@@ -1187,6 +1202,7 @@ static bool playback_settings_menu(void)
         { ID2P(LANG_FADE_ON_STOP), set_fade_on_stop },
 #if CONFIG_HWCODEC == MASNONE
         { ID2P(LANG_CROSSFADE), crossfade },
+        { ID2P(LANG_CROSSFADE_DURATION), crossfade_duration },
 #endif
 #ifdef HAVE_SPDIF_POWER
         { ID2P(LANG_SPDIF_ENABLE), spdif },

firmware/export/audio.h

@@ -71,7 +71,7 @@ struct mp3entry* audio_current_track(void);
 struct mp3entry* audio_next_track(void);
 bool audio_has_changed_track(void);
 void audio_get_debugdata(struct audio_debug *dbgdata);
-void audio_set_crossfade_amount(int seconds);
+void audio_set_crossfade(int type);
 void audio_set_buffer_margin(int seconds);
 unsigned int audio_error(void);
 void audio_error_clear(void);

firmware/pcm_playback.c

@@ -286,7 +286,7 @@ void DMA0(void)
     /* Stop on error */
     if(res & 0x70)
     {
-       dma_stop();
+       pcm_play_stop();
        logf("DMA Error:0x%04x", res);
     }
     else
@@ -302,7 +302,7 @@ void DMA0(void)
         else
         {
             /* Finished playing */
-            dma_stop();
+            pcm_play_stop();
             logf("DMA No Data:0x%04x", res);
         }
     }