diff --git a/configure b/configure
index b14adcc4d1..a183b5be2d 100755
--- a/configure
+++ b/configure
@@ -54,6 +54,8 @@ if test "$E1" != 0 || test "$E2" = 0; then
     exit 1
 fi
 
+test -d /usr/xpg4/bin && PATH=/usr/xpg4/bin:$PATH
+
 show_help(){
     cat <<EOF
 Usage: configure [options]
diff --git a/libavcodec/dcadec.c b/libavcodec/dcadec.c
index 4d5e1152f2..42f1eed6f0 100644
--- a/libavcodec/dcadec.c
+++ b/libavcodec/dcadec.c
@@ -32,6 +32,7 @@
 #include "libavutil/intreadwrite.h"
 #include "libavutil/mathematics.h"
 #include "libavutil/audioconvert.h"
+#include "libavutil/samplefmt.h"
 #include "avcodec.h"
 #include "dsputil.h"
 #include "fft.h"
@@ -420,6 +421,9 @@ typedef struct {
 
     DECLARE_ALIGNED(32, float, subband_samples)[DCA_BLOCKS_MAX][DCA_PRIM_CHANNELS_MAX][DCA_SUBBANDS][8];
     float *samples_chanptr[DCA_PRIM_CHANNELS_MAX + 1];
+    float *extra_channels[DCA_PRIM_CHANNELS_MAX + 1];
+    uint8_t *extra_channels_buffer;
+    unsigned int extra_channels_buffer_size;
 
     uint8_t dca_buffer[DCA_MAX_FRAME_SIZE + DCA_MAX_EXSS_HEADER_SIZE + DCA_BUFFER_PADDING_SIZE];
     int dca_buffer_size;        ///< how much data is in the dca_buffer
@@ -2070,7 +2074,7 @@ static int dca_decode_frame(AVCodecContext *avctx, void *data,
     float *dst_chan;
     DCAContext *s = avctx->priv_data;
     int core_ss_end;
-    int channels;
+    int channels, full_channels;
     float scale;
     int achan;
     int chset;
@@ -2211,7 +2215,7 @@ static int dca_decode_frame(AVCodecContext *avctx, void *data,
 
     avctx->profile = s->profile;
 
-    channels = s->prim_channels + !!s->lfe;
+    full_channels = channels = s->prim_channels + !!s->lfe;
 
     /* If we have XXCH then the channel layout is managed differently */
     /* note that XLL will also have another way to do things */
@@ -2340,12 +2344,35 @@ static int dca_decode_frame(AVCodecContext *avctx, void *data,
     }
     samples_flt = (float  **) s->frame.extended_data;
 
+    /* allocate buffer for extra channels if downmixing */
+    if (avctx->channels < full_channels) {
+        ret = av_samples_get_buffer_size(NULL, full_channels - channels,
+                                         s->frame.nb_samples,
+                                         avctx->sample_fmt, 0);
+        if (ret < 0)
+            return ret;
+
+        av_fast_malloc(&s->extra_channels_buffer,
+                       &s->extra_channels_buffer_size, ret);
+        if (!s->extra_channels_buffer)
+            return AVERROR(ENOMEM);
+
+        ret = av_samples_fill_arrays((uint8_t **)s->extra_channels, NULL,
+                                     s->extra_channels_buffer,
+                                     full_channels - channels,
+                                     s->frame.nb_samples, avctx->sample_fmt, 0);
+        if (ret < 0)
+            return ret;
+    }
+
     /* filter to get final output */
     for (i = 0; i < (s->sample_blocks / 8); i++) {
         int ch;
 
         for (ch = 0; ch < channels; ch++)
             s->samples_chanptr[ch] = samples_flt[ch] + i * 256;
+        for (; ch < full_channels; ch++)
+            s->samples_chanptr[ch] = s->extra_channels[ch - channels] + i * 256;
 
         dca_filter_channels(s, i);
 
@@ -2457,6 +2484,7 @@ static av_cold int dca_decode_end(AVCodecContext *avctx)
 {
     DCAContext *s = avctx->priv_data;
     ff_mdct_end(&s->imdct);
+    av_freep(&s->extra_channels_buffer);
     return 0;
 }
 
diff --git a/libavutil/avstring.c b/libavutil/avstring.c
index 8b258a4971..73ab7aad1b 100644
--- a/libavutil/avstring.c
+++ b/libavutil/avstring.c
@@ -252,10 +252,12 @@ int main(void)
         };
 
         for (i=0; i < FF_ARRAY_ELEMS(strings); i++) {
-            const char *p= strings[i];
+            const char *p = strings[i], *q;
             printf("|%s|", p);
-            printf(" -> |%s|", av_get_token(&p, ":"));
+            q = av_get_token(&p, ":");
+            printf(" -> |%s|", q);
             printf(" + |%s|\n", p);
+            av_free(q);
         }
     }