avcodec: add libdcadec decoder

Signed-off-by: Michael Niedermayer <michaelni@gmx.at>

configure

@@ -210,6 +210,7 @@ External library support:
   --enable-libcdio         enable audio CD grabbing with libcdio [no]
   --enable-libdc1394       enable IIDC-1394 grabbing using libdc1394
                            and libraw1394 [no]
+  --enable-libdcadec       enable DCA decoding via libdcadec [no]
   --enable-libfaac         enable AAC encoding via libfaac [no]
   --enable-libfdk-aac      enable AAC de/encoding via libfdk-aac [no]
   --enable-libflite        enable flite (voice synthesis) support via libflite [no]
@@ -1353,6 +1354,7 @@ EXTERNAL_LIBRARY_LIST="
     libcdio
     libcelt
     libdc1394
+    libdcadec
     libfaac
     libfdk_aac
     libflite
@@ -2359,6 +2361,7 @@ vc1_parser_select="mpegvideo startcode vc1_decoder"
 # external libraries
 libaacplus_encoder_deps="libaacplus"
 libcelt_decoder_deps="libcelt"
+libdcadec_decoder_deps="libdcadec"
 libfaac_encoder_deps="libfaac"
 libfaac_encoder_select="audio_frame_queue"
 libfdk_aac_decoder_deps="libfdk_aac"
@@ -4922,6 +4925,7 @@ enabled libcelt           && require libcelt celt/celt.h celt_decode -lcelt0 &&
                              { check_lib celt/celt.h celt_decoder_create_custom -lcelt0 ||
                                die "ERROR: libcelt must be installed and version must be >= 0.11.0."; }
 enabled libcaca           && require_pkg_config caca caca.h caca_create_canvas
+enabled libdcadec         && require libdcadec dca_context.h dcadec_context_create -ldcadec
 enabled libfaac           && require2 libfaac "stdint.h faac.h" faacEncGetVersion -lfaac
 enabled libfdk_aac        && require libfdk_aac fdk-aac/aacenc_lib.h aacEncOpen -lfdk-aac
 flite_libs="-lflite_cmu_time_awb -lflite_cmu_us_awb -lflite_cmu_us_kal -lflite_cmu_us_kal16 -lflite_cmu_us_rms -lflite_cmu_us_slt -lflite_usenglish -lflite_cmulex -lflite"