Updated the input channel layouts to store the source LFE information as well as the non-LFE layout. This is so muxavi.c can output the correct channel count for AC3 passthru for all AC3 sources. Updated Controller.mm, scan.c and work.c to use these revised layouts.

Added a new property to the work object, to remember the source audio codec for audio work objects.  This enables encfaac to detect an 6-channel AC3 source to apply the QuickTime 6-channel audio mapping (as opposed to a DTS source, which doesn't need it).
Fixed the Dolby Pro Logic I/II downmix mappings in libdca and updated the libdca patch.  Uploaded a new set of pre-built darwin contribs (0014) with this patch applied.

git-svn-id: svn://svn.handbrake.fr/HandBrake/trunk@570 b64f7644-9d1e-0410-96f1-a4d463321fa5

8 files changed, 112 insertions, 85 deletions

diff --git a/MacOsXContribBinariesVersion.txt b/MacOsXContribBinariesVersion.txt
index f582134f6..1ca31086b 100644
--- a/MacOsXContribBinariesVersion.txt
+++ b/MacOsXContribBinariesVersion.txt
@@ -1 +1 @@
-0013
+0014
diff --git a/contrib/patch-libdca.patch b/contrib/patch-libdca.patch
index 92f2cfe2f..cab8db266 100644
--- a/contrib/patch-libdca.patch
+++ b/contrib/patch-libdca.patch
@@ -341,7 +341,7 @@ diff -Naur libdca/libdca/dca_internal.h libdca_patched/libdca/dca_internal.h
  #define MUL(a,b) ((int)(((int64_t)(a) * (b) + (1 << 29)) >> 30))
 diff -Naur libdca/libdca/downmix.c libdca_patched/libdca/downmix.c
 --- libdca/libdca/downmix.c	2007-05-02 10:05:05.000000000 +0100
-+++ libdca_patched/libdca/downmix.c	2007-05-02 10:09:34.000000000 +0100
++++ libdca_patched/libdca/downmix.c	2007-05-06 19:45:54.000000000 +0100
 @@ -33,8 +33,8 @@
  
  #define CONVERT(acmod,output) (((output) << DCA_CHANNEL_BITS) + (acmod))
@@ -470,21 +470,39 @@ diff -Naur libdca/libdca/downmix.c libdca_patched/libdca/downmix.c
  
      for (i = 0; i < 256; i++) {
  	common = BIAS (samples[i] + samples[i + 768]);
-@@ -426,10 +429,10 @@
+@@ -426,23 +429,32 @@
      }
  }
  
 -static void mix31toS (sample_t * samples, sample_t bias)
 +static void mix31toS (dca_sample_t * samples, dca_sample_t bias)
  {
-     int i;
+-    int i;
 -    sample_t common, surround;
-+    dca_sample_t common, surround;
  
-     for (i = 0; i < 256; i++) {
- 	common = BIAS (samples[i]);
-@@ -439,10 +442,10 @@
-     }
+-    for (i = 0; i < 256; i++) {
+-	common = BIAS (samples[i]);
+-	surround = samples[i + 768];
+-	samples[i] = samples[i + 256] + common - surround;
+-	samples[i + 256] = samples[i + 512] + common + surround;
+-    }
++	int i;
++	dca_sample_t cc, surround, Lt, Rt;
++
++	for (i = 0; i < 256; i++) {
++
++		cc = samples[i] * LEVEL_3DB;
++
++		surround = samples[i + 768];
++
++		Lt = samples[i + 256] + cc;
++		Rt = samples[i + 512] + cc;
++
++		samples[i] = Lt - surround;
++		samples[i + 256] = Rt + surround;
++
++	}
++
  }
  
 -static void mix22toS (sample_t * samples, sample_t bias)
@@ -496,7 +514,7 @@ diff -Naur libdca/libdca/downmix.c libdca_patched/libdca/downmix.c
  
      for (i = 0; i < 256; i++) {
  	surround = samples[i + 512] + samples[i + 768];
-@@ -451,10 +454,10 @@
+@@ -451,10 +463,10 @@
      }
  }
  
@@ -509,7 +527,7 @@ diff -Naur libdca/libdca/downmix.c libdca_patched/libdca/downmix.c
  
      for (i = 0; i < 256; i++) {
  	common = BIAS (samples[i]);
-@@ -463,20 +466,48 @@
+@@ -463,20 +475,55 @@
      }
  }
  
@@ -527,15 +545,16 @@ diff -Naur libdca/libdca/downmix.c libdca_patched/libdca/downmix.c
 -    }
 -}
 +	if (use_dpl2 == 1) {
-+
+ 
+-static void move2to1 (sample_t * src, sample_t * dest, sample_t bias)
 +		int i;
 +		dca_sample_t cc, Lt, Rt, Ls, Rs, Lss, Rss;
 +	
 +		for (i = 0; i < 256; i++) {
 +	
-+			cc = samples[i + 256] * LEVEL_3DB;
++			cc = samples[i] * LEVEL_3DB;
 +		
-+			Lt = samples[i] + cc;
++			Lt = samples[i + 256] + cc;
 +			Rt = samples[i + 512] + cc;
 +		
 +			Ls = samples[i + 768];
@@ -552,16 +571,22 @@ diff -Naur libdca/libdca/downmix.c libdca_patched/libdca/downmix.c
 +	} else {
 +
 +		int i;
-+		dca_sample_t common, surround;
++		dca_sample_t cc, surround, Lt, Rt;
 +	
 +		for (i = 0; i < 256; i++) {
-+		common = samples[i + 256] + bias;
-+		surround = samples[i + 768] + samples[i + 1024];
-+		samples[i] += common - surround;
-+		samples[i + 256] = samples[i + 512] + common + surround;
++
++			cc = samples[i] * LEVEL_3DB;
++
++			surround = samples[i + 768] + samples[i + 1024];
++
++			Lt = samples[i + 256] + cc;
++			Rt = samples[i + 512] + cc;
++
++			samples[i] = Lt - surround;
++			samples[i + 256] = Rt + surround;
++
 +		}
- 
--static void move2to1 (sample_t * src, sample_t * dest, sample_t bias)
++
 +	}
 +
 +}
@@ -569,7 +594,7 @@ diff -Naur libdca/libdca/downmix.c libdca_patched/libdca/downmix.c
  {
      int i;
  
-@@ -484,7 +515,7 @@
+@@ -484,7 +531,7 @@
  	dest[i] = BIAS (src[i] + src[i + 256]);
  }
  
@@ -578,7 +603,7 @@ diff -Naur libdca/libdca/downmix.c libdca_patched/libdca/downmix.c
  {
      int i;
  
-@@ -492,8 +523,8 @@
+@@ -492,8 +539,8 @@
  	samples[i] = 0;
  }
  
@@ -589,7 +614,7 @@ diff -Naur libdca/libdca/downmix.c libdca_patched/libdca/downmix.c
  {
      (void)clev;
  
-@@ -529,7 +560,7 @@
+@@ -529,7 +576,7 @@
  	break;
  
      case CONVERT (DCA_MONO, DCA_DOLBY):
@@ -598,7 +623,7 @@ diff -Naur libdca/libdca/downmix.c libdca_patched/libdca/downmix.c
  	break;
  
      case CONVERT (DCA_3F, DCA_STEREO):
-@@ -576,7 +607,7 @@
+@@ -576,7 +623,7 @@
  	break;
  
      case CONVERT (DCA_3F2R, DCA_DOLBY):
@@ -607,7 +632,7 @@ diff -Naur libdca/libdca/downmix.c libdca_patched/libdca/downmix.c
  	break;
  
      case CONVERT (DCA_3F1R, DCA_3F):
-@@ -594,7 +625,7 @@
+@@ -594,7 +641,7 @@
  
      case CONVERT (DCA_3F1R, DCA_2F1R):
  	mix3to2 (samples, bias);
@@ -616,7 +641,7 @@ diff -Naur libdca/libdca/downmix.c libdca_patched/libdca/downmix.c
  	break;
  
      case CONVERT (DCA_2F2R, DCA_2F1R):
-@@ -608,30 +639,52 @@
+@@ -608,30 +655,52 @@
  
      case CONVERT (DCA_3F2R, DCA_3F1R):
  	mix2to1 (samples + 768, samples + 1024, bias);
@@ -675,7 +700,7 @@ diff -Naur libdca/libdca/downmix.c libdca_patched/libdca/downmix.c
  {
      switch (CONVERT (acmod, output & DCA_CHANNEL_MASK)) {
  
-@@ -657,7 +710,7 @@
+@@ -657,7 +726,7 @@
      case CONVERT (DCA_3F, DCA_STEREO):
      case CONVERT (DCA_3F, DCA_DOLBY):
      mix_3to2:
@@ -684,7 +709,7 @@ diff -Naur libdca/libdca/downmix.c libdca_patched/libdca/downmix.c
  	zero (samples + 256);
  	break;
  
-@@ -684,11 +737,11 @@
+@@ -684,11 +753,11 @@
  	zero (samples + 1024);
      case CONVERT (DCA_3F1R, DCA_2F1R):
      mix_31to21:
diff --git a/libhb/common.h b/libhb/common.h
index 151b25b0e..8b09c85c9 100644
--- a/libhb/common.h
+++ b/libhb/common.h
@@ -278,16 +278,6 @@ struct hb_audio_s
     int  codec;
     int  rate;
     int  bitrate;
-	/* src_discrete_front_channels: The # of discrete front channels in the source audio
-	   src_discrete_rear_channels:  The # of discrete rear channels in the source audio
-	   src_discrete_lfe_channels:   The # of discrete lfe channels in the source audio
-	   src_encoded_front_channels:  The # of front channels encoded into the source audio
-	   src_encoded_rear_channels:   The # of rear channels encoded into the source audio */
-    int src_discrete_front_channels;
-    int src_discrete_rear_channels;
-	int src_discrete_lfe_channels;
-    int src_encoded_front_channels;
-    int src_encoded_rear_channels;
     
     /* ac3flags is only set when the source audio format is HB_ACODEC_AC3 */
     int ac3flags;
@@ -296,11 +286,12 @@ struct hb_audio_s
     int dcaflags;
 
 /* define some masks, used to extract the various information from the HB_AMIXDOWN_XXXX values */
-#define HB_INPUT_CH_LAYOUT_DISCRETE_FRONT_MASK 0xF0000
-#define HB_INPUT_CH_LAYOUT_DISCRETE_REAR_MASK  0x0F000
-#define HB_INPUT_CH_LAYOUT_DISCRETE_LFE_MASK   0x00F00
-#define HB_INPUT_CH_LAYOUT_ENCODED_FRONT_MASK  0x000F0
-#define HB_INPUT_CH_LAYOUT_ENCODED_REAR_MASK   0x0000F
+#define HB_INPUT_CH_LAYOUT_DISCRETE_FRONT_MASK  0x00F0000
+#define HB_INPUT_CH_LAYOUT_DISCRETE_REAR_MASK   0x000F000
+#define HB_INPUT_CH_LAYOUT_DISCRETE_LFE_MASK    0x0000F00
+#define HB_INPUT_CH_LAYOUT_DISCRETE_NO_LFE_MASK 0xFFFF0FF
+#define HB_INPUT_CH_LAYOUT_ENCODED_FRONT_MASK   0x00000F0
+#define HB_INPUT_CH_LAYOUT_ENCODED_REAR_MASK    0x000000F
 
 /* define the input channel layouts used to describe the channel layout of this audio */
 #define HB_INPUT_CH_LAYOUT_MONO    0x0110010
@@ -311,13 +302,14 @@ struct hb_audio_s
 #define HB_INPUT_CH_LAYOUT_3F1R    0x0631031
 #define HB_INPUT_CH_LAYOUT_2F2R    0x0722022
 #define HB_INPUT_CH_LAYOUT_3F2R    0x0832032
-#define HB_INPUT_CH_LAYOUT_3F2RLFE 0x0A32132
 #define HB_INPUT_CH_LAYOUT_4F2R    0x0942042
+#define HB_INPUT_CH_LAYOUT_HAS_LFE 0x0000100
 
 /* define some macros to extract the various information from the HB_AMIXDOWN_XXXX values */
 #define HB_INPUT_CH_LAYOUT_GET_DISCRETE_FRONT_COUNT( a ) ( ( a & HB_INPUT_CH_LAYOUT_DISCRETE_FRONT_MASK ) >> 16 )
 #define HB_INPUT_CH_LAYOUT_GET_DISCRETE_REAR_COUNT( a )  ( ( a & HB_INPUT_CH_LAYOUT_DISCRETE_REAR_MASK ) >> 12 )
 #define HB_INPUT_CH_LAYOUT_GET_DISCRETE_LFE_COUNT( a )   ( ( a & HB_INPUT_CH_LAYOUT_DISCRETE_LFE_MASK ) >> 8 )
+#define HB_INPUT_CH_LAYOUT_GET_DISCRETE_COUNT( a ) ( ( ( a & HB_INPUT_CH_LAYOUT_DISCRETE_FRONT_MASK ) >> 16 ) + ( ( a & HB_INPUT_CH_LAYOUT_DISCRETE_REAR_MASK ) >> 12 ) + ( ( a & HB_INPUT_CH_LAYOUT_DISCRETE_LFE_MASK ) >> 8 ) )
 #define HB_INPUT_CH_LAYOUT_GET_ENCODED_FRONT_COUNT( a )   ( ( a & HB_INPUT_CH_LAYOUT_ENCODED_FRONT_MASK ) >> 4 )
 #define HB_INPUT_CH_LAYOUT_GET_ENCODED_REAR_COUNT( a )   ( ( a & HB_INPUT_CH_LAYOUT_ENCODED_REAR_MASK ) )
 
@@ -481,6 +473,8 @@ struct hb_work_object_s
 
 	/* amixdown is the mixdown format to be used if the work object is an audio track */
    	int               amixdown;
+    /* source_acodec is the source audio codec if the work object is an audio track */
+    int               source_acodec;
 
     hb_work_private_t * private_data;
 
diff --git a/libhb/encfaac.c b/libhb/encfaac.c
index 95a047ac6..5545f9ebf 100644
--- a/libhb/encfaac.c
+++ b/libhb/encfaac.c
@@ -79,17 +79,19 @@ int encfaacInit( hb_work_object_t * w, hb_job_t * job )
     cfg->outputFormat  = 0;
     cfg->inputFormat   =  FAAC_INPUT_FLOAT;
 	
-	if (pv->out_discrete_channels == 6) {
-		/* we are preserving 5.1 audio into 6-channel AAC, and need to
-		re-map the output of deca52 into our own mapping - the mapping
-		below is the default mapping expected by QuickTime */
-		/* This doesn't seem to be correct for VLC on Linux */
-		cfg->channel_map[0] = 2;
-		cfg->channel_map[1] = 1;
-		cfg->channel_map[2] = 3;
-		cfg->channel_map[3] = 4;
-		cfg->channel_map[4] = 5;
-		cfg->channel_map[5] = 0;
+	if (w->amixdown == HB_AMIXDOWN_6CH && w->source_acodec == HB_ACODEC_AC3)
+    {
+        /* we are preserving 5.1 AC-3 audio into 6-channel AAC, and need to
+        re-map the output of deca52 into our own mapping - the mapping
+        below is the default mapping expected by QuickTime */
+        /* DTS output from libdca is already in the right mapping for QuickTime */
+        /* This doesn't seem to be correct for VLC on Linux */
+        cfg->channel_map[0] = 2;
+        cfg->channel_map[1] = 1;
+        cfg->channel_map[2] = 3;
+        cfg->channel_map[3] = 4;
+        cfg->channel_map[4] = 5;
+        cfg->channel_map[5] = 0;
 	}
 	
     if( !faacEncSetConfiguration( pv->faac, cfg ) )
diff --git a/libhb/muxavi.c b/libhb/muxavi.c
index 214393d68..de377f692 100644
--- a/libhb/muxavi.c
+++ b/libhb/muxavi.c
@@ -369,7 +369,7 @@ static int AVIInit( hb_mux_object_t * m )
         {
             f.BytesCount     = sizeof( hb_wave_formatex_t ) - 8;
             f.FormatTag      = 0x2000;
-            f.Channels       = 2;
+            f.Channels       = HB_INPUT_CH_LAYOUT_GET_DISCRETE_COUNT(audio->input_channel_layout);
             f.SamplesPerSec  = audio->rate;
         }
         else
@@ -377,7 +377,7 @@ static int AVIInit( hb_mux_object_t * m )
             f.BytesCount     = sizeof( hb_wave_formatex_t ) +
                                sizeof( hb_wave_mp3_t ) - 8;
             f.FormatTag      = 0x55;
-            f.Channels       = 2;
+            f.Channels       = HB_AMIXDOWN_GET_DISCRETE_CHANNEL_COUNT(job->audio_mixdowns[i]);
             f.SamplesPerSec  = job->arate;
         }
         f.AvgBytesPerSec = h.Rate;
diff --git a/libhb/scan.c b/libhb/scan.c
index a93d3015a..45da1b7d1 100644
--- a/libhb/scan.c
+++ b/libhb/scan.c
@@ -506,11 +506,7 @@ static void LookForAC3AndDCA( hb_title_t * title, hb_buffer_t * b )
                         break;
                     /* 3F/2R input */
                     case A52_3F2R:
-                        if (flags & A52_LFE) {
-                            audio->input_channel_layout = HB_INPUT_CH_LAYOUT_3F2RLFE;
-                        } else {
-                            audio->input_channel_layout = HB_INPUT_CH_LAYOUT_3F2R;
-                        }
+                        audio->input_channel_layout = HB_INPUT_CH_LAYOUT_3F2R;
                         break;
                     /* 3F/1R input */
                     case A52_3F1R:
@@ -530,6 +526,12 @@ static void LookForAC3AndDCA( hb_title_t * title, hb_buffer_t * b )
                     default:
                         audio->input_channel_layout = HB_INPUT_CH_LAYOUT_STEREO;
                 }
+                
+                /* add in our own LFE flag if the source has LFE */
+                if (flags & A52_LFE)
+                {
+                    audio->input_channel_layout = audio->input_channel_layout | HB_INPUT_CH_LAYOUT_HAS_LFE;
+                }
 
                 /* store the AC3 flags for future reference
                 This enables us to find out if we had a stereo or Dolby source later on */
@@ -582,11 +584,7 @@ static void LookForAC3AndDCA( hb_title_t * title, hb_buffer_t * b )
                         break;
                     /* 3F/2R input */
                     case DCA_3F2R:
-                        if (flags & DCA_LFE) {
-                            audio->input_channel_layout = HB_INPUT_CH_LAYOUT_3F2RLFE;
-                        } else {
-                            audio->input_channel_layout = HB_INPUT_CH_LAYOUT_3F2R;
-                        }
+                        audio->input_channel_layout = HB_INPUT_CH_LAYOUT_3F2R;
                         break;
                     /* 3F/1R input */
                     case DCA_3F1R:
@@ -610,6 +608,12 @@ static void LookForAC3AndDCA( hb_title_t * title, hb_buffer_t * b )
                         audio->input_channel_layout = HB_INPUT_CH_LAYOUT_STEREO;
                 }
 
+                /* add in our own LFE flag if the source has LFE */
+                if (flags & DCA_LFE)
+                {
+                    audio->input_channel_layout = audio->input_channel_layout | HB_INPUT_CH_LAYOUT_HAS_LFE;
+                }
+
                 /* store the DCA flags for future reference
                 This enables us to find out if we had a stereo or Dolby source later on */
                 audio->config.dca.dcaflags = flags;
diff --git a/libhb/work.c b/libhb/work.c
index 7cdb09fcc..aa7709719 100644
--- a/libhb/work.c
+++ b/libhb/work.c
@@ -255,7 +255,7 @@ static void do_job( hb_job_t * job, int cpu_count )
             audio->codec == HB_ACODEC_DCA) && job->acodec == HB_ACODEC_FAAC);
 
         /* find out what the format of our source audio is */
-        switch (audio->input_channel_layout) {
+        switch (audio->input_channel_layout & HB_INPUT_CH_LAYOUT_DISCRETE_NO_LFE_MASK) {
         
             /* mono sources */
             case HB_INPUT_CH_LAYOUT_MONO:
@@ -297,14 +297,13 @@ static void do_job( hb_job_t * job, int cpu_count )
 
             /* 3F/2R input */
             case HB_INPUT_CH_LAYOUT_3F2R:
-            case HB_INPUT_CH_LAYOUT_3F2RLFE:
                 /* if we've requested a mono mixdown, and it is supported, then do the mix */
                 /* use dpl2 if not supported */
                 if (job->audio_mixdowns[i] == HB_AMIXDOWN_MONO && audioCodecsSupportMono == 0) {
                     job->audio_mixdowns[i] = HB_AMIXDOWN_DOLBYPLII;
                 } else {
                     /* check if we have 3F2R input and also have an LFE - i.e. we have a 5.1 source) */
-                    if (audio->input_channel_layout == HB_INPUT_CH_LAYOUT_3F2RLFE) {
+                    if (audio->input_channel_layout & HB_INPUT_CH_LAYOUT_HAS_LFE) {
                         /* we have a 5.1 source */
                         /* if we requested 6ch, but our audio format doesn't support it, then mix to DPLII instead */
                         if (job->audio_mixdowns[i] == HB_AMIXDOWN_6CH && audioCodecsSupport6Ch == 0) {
@@ -383,10 +382,11 @@ static void do_job( hb_job_t * job, int cpu_count )
                 w = getWork( WORK_DECLPCM );
                 break;
         }
-        w->fifo_in  = audio->fifo_in;
-        w->fifo_out = audio->fifo_raw;
-        w->config   = &audio->config;
-        w->amixdown = audio->amixdown;
+        w->fifo_in       = audio->fifo_in;
+        w->fifo_out      = audio->fifo_raw;
+        w->config        = &audio->config;
+        w->amixdown      = audio->amixdown;
+        w->source_acodec = audio->codec;
         
         /* FIXME: This feels really hackish, anything better? */
         audio_w = calloc( sizeof( hb_work_object_t ), 1 );
@@ -409,10 +409,11 @@ static void do_job( hb_job_t * job, int cpu_count )
 
         if( job->acodec != HB_ACODEC_AC3 )
         {
-            w->fifo_in  = audio->fifo_sync;
-            w->fifo_out = audio->fifo_out;
-            w->config   = &audio->config;
-            w->amixdown = audio->amixdown;
+            w->fifo_in       = audio->fifo_sync;
+            w->fifo_out      = audio->fifo_out;
+            w->config        = &audio->config;
+            w->amixdown      = audio->amixdown;
+            w->source_acodec = audio->codec;
             
             /* FIXME: This feels really hackish, anything better? */
             audio_w = calloc( sizeof( hb_work_object_t ), 1 );
diff --git a/macosx/Controller.mm b/macosx/Controller.mm
index c8311f4e3..871dfae31 100644
--- a/macosx/Controller.mm
+++ b/macosx/Controller.mm
@@ -1554,6 +1554,9 @@ return registrationDictionary;
                 /* keep a track of the min and max mixdowns we used, so we can select the best match later */
                 int minMixdownUsed = 0;
                 int maxMixdownUsed = 0;
+                
+                /* get the input channel layout without any lfe channels */
+                int layout = audio->input_channel_layout & HB_INPUT_CH_LAYOUT_DISCRETE_NO_LFE_MASK;
 
                 /* do we want to add a mono option? */
                 if (audioCodecsSupportMono == 1) {
@@ -1568,8 +1571,7 @@ return registrationDictionary;
                 /* do we want to add a stereo option? */
                 /* offer stereo if we have a mono source and non-mono-supporting codecs, as otherwise we won't have a mixdown at all */
                 /* also offer stereo if we have a stereo-or-better source */
-                if ((audio->input_channel_layout == HB_INPUT_CH_LAYOUT_MONO && audioCodecsSupportMono == 0) ||
-                    audio->input_channel_layout >= HB_INPUT_CH_LAYOUT_STEREO) {
+                if ((layout == HB_INPUT_CH_LAYOUT_MONO && audioCodecsSupportMono == 0) || layout >= HB_INPUT_CH_LAYOUT_STEREO) {
                     id<NSMenuItem> menuItem = [[mixdownPopUp menu] addItemWithTitle:
                         [NSString stringWithCString: hb_audio_mixdowns[1].human_readable_name]
                         action: NULL keyEquivalent: @""];
@@ -1579,8 +1581,7 @@ return registrationDictionary;
                 }
 
                 /* do we want to add a dolby surround (DPL1) option? */
-                if (audio->input_channel_layout == HB_INPUT_CH_LAYOUT_3F1R || audio->input_channel_layout == HB_INPUT_CH_LAYOUT_3F2R ||
-                    audio->input_channel_layout == HB_INPUT_CH_LAYOUT_3F2RLFE || audio->input_channel_layout == HB_INPUT_CH_LAYOUT_DOLBY) {
+                if (layout == HB_INPUT_CH_LAYOUT_3F1R || layout == HB_INPUT_CH_LAYOUT_3F2R || layout == HB_INPUT_CH_LAYOUT_DOLBY) {
                     id<NSMenuItem> menuItem = [[mixdownPopUp menu] addItemWithTitle:
                         [NSString stringWithCString: hb_audio_mixdowns[2].human_readable_name]
                         action: NULL keyEquivalent: @""];
@@ -1590,7 +1591,7 @@ return registrationDictionary;
                 }
 
                 /* do we want to add a dolby pro logic 2 (DPL2) option? */
-                if (audio->input_channel_layout == HB_INPUT_CH_LAYOUT_3F2R || audio->input_channel_layout == HB_INPUT_CH_LAYOUT_3F2RLFE) {
+                if (layout == HB_INPUT_CH_LAYOUT_3F2R) {
                     id<NSMenuItem> menuItem = [[mixdownPopUp menu] addItemWithTitle:
                         [NSString stringWithCString: hb_audio_mixdowns[3].human_readable_name]
                         action: NULL keyEquivalent: @""];
@@ -1600,7 +1601,7 @@ return registrationDictionary;
                 }
 
                 /* do we want to add a 6-channel discrete option? */
-                if (audioCodecsSupport6Ch == 1 && audio->input_channel_layout == HB_INPUT_CH_LAYOUT_3F2RLFE) {
+                if (audioCodecsSupport6Ch == 1 && layout == HB_INPUT_CH_LAYOUT_3F2R && (audio->input_channel_layout & HB_INPUT_CH_LAYOUT_HAS_LFE)) {
                     id<NSMenuItem> menuItem = [[mixdownPopUp menu] addItemWithTitle:
                         [NSString stringWithCString: hb_audio_mixdowns[4].human_readable_name]
                         action: NULL keyEquivalent: @""];