SRC: support setting output format to rf64 for huge files

See also:
 - https://github.com/swesterfeld/audiowmark/issues/2
 - https://github.com/swesterfeld/audiowmark/issues/30Signed-off-by: Stefan Westerfeld <stefan@space.twc.de>

src/audiostream.cc

@@ -87,9 +87,16 @@ AudioOutputStream::create (const string& filename, int n_channels, int sample_ra
     }
   else
     {
+      SFOutputStream::OutFormat out_format;
+
+      if (Params::output_format == Format::RF64)
+        out_format = SFOutputStream::OutFormat::RF64;
+      else
+        out_format = SFOutputStream::OutFormat::WAV;
+
       SFOutputStream *sfostream = new SFOutputStream();
       out_stream.reset (sfostream);
-      err = sfostream->open (filename, n_channels, sample_rate, bit_depth);
+      err = sfostream->open (filename, n_channels, sample_rate, bit_depth, out_format);
       if (err)
         return nullptr;
     }

src/audiowmark.cc

@@ -112,6 +112,9 @@ parse_format (const string& str)
     return Format::RAW;
   if (str == "auto")
     return Format::AUTO;
+  if (str == "rf64")
+    return Format::RF64;
+
   error ("audiowmark: unsupported format '%s'\n", str.c_str());
   exit (1);
 }
@@ -657,6 +660,11 @@ parse_add_options (ArgParser& ap)
     {
       Params::test_no_limiter = true;
     }
+  if (Params::input_format == Format::RF64)
+    {
+      error ("audiowmark: using rf64 as input format has no effect\n");
+      exit (1);
+    }
 }
 
 void

src/sfoutputstream.cc

@@ -53,6 +53,8 @@ SFOutputStream::open (std::function<SNDFILE* (SF_INFO *)> open_func, int n_chann
      {
        case OutFormat::WAV:  sfinfo.format = SF_FORMAT_WAV;
                              break;
+       case OutFormat::RF64: sfinfo.format = SF_FORMAT_RF64;
+                             break;
        case OutFormat::FLAC: sfinfo.format = SF_FORMAT_FLAC;
                              break;
        default:              assert (false);

src/sfoutputstream.hh

@@ -28,7 +28,7 @@
 class SFOutputStream : public AudioOutputStream
 {
 public:
-  enum class OutFormat { WAV, FLAC };
+  enum class OutFormat { WAV, RF64, FLAC };
 
 private:
   SFVirtualData m_virtual_data;

src/wmcommon.hh

@@ -28,7 +28,7 @@
 
 #include <assert.h>
 
-enum class Format { AUTO = 1, RAW = 2 };
+enum class Format { AUTO = 1, RAW = 2, RF64 = 3 };
 
 class Params
 {