Added more capabilities to Audiere sources

sound/source.h

@@ -33,7 +33,8 @@ class SampleSource : public Stream::Stream
 
   bool eof() const { return isEof; }
 
-  // Disabled functions
+  // Disabled functions by default. You can still override them in
+  // subclasses.
   void seek(size_t pos) const { assert(0); }
   size_t tell() const { assert(0); }
   size_t size() const { assert(0); }

sound/sources/audiere_source.cpp

@@ -28,11 +28,14 @@ void AudiereSource::getInfo(int32_t *rate, int32_t *channels, int32_t *bits)
 {
   SampleFormat fmt;
   sample->getFormat(*channels, *rate, fmt);
-  if(fmt == SF_U8)
-    *bits = 8;
-  else if(fmt == SF_S16)
-    *bits = 16;
-  else assert(0);
+  if(bits)
+    {
+      if(fmt == SF_U8)
+        *bits = 8;
+      else if(fmt == SF_S16)
+        *bits = 16;
+      else assert(0);
+    }
 }
 
 /*
@@ -103,7 +106,7 @@ AudiereSource::AudiereSource(const std::string &file)
   if(!sample)
     fail("Couldn't load file " + file);
 
-  getFormat();
+  setup();
 }
 
 AudiereSource::AudiereSource(Stream::Stream *input)
@@ -114,15 +117,15 @@ AudiereSource::AudiereSource(Stream::Stream *input)
   if(!sample)
     fail("Couldn't load stream");
 
-  getFormat();
+  setup();
 }
 
 AudiereSource::AudiereSource(audiere::SampleSourcePtr src)
   : sample(src)
-{ assert(sample); getFormat(); }
+{ assert(sample); setup(); }
 
 // Common function called from all constructors
-AudiereSource::getFormat()
+AudiereSource::setup()
 {
   assert(sample);
 
@@ -136,4 +139,8 @@ AudiereSource::getFormat()
   // Make sure that our pullover hack will work. Increase this size if
   // this doesn't work in all cases.
   assert(frameSize <= PSIZE);
+
+  isSeekable = sample->isSeekable();
+  hasPosition = true;
+  hasSize = true;
 }

sound/sources/audiere_source.h

@@ -40,6 +40,10 @@ class AudiereSource : public SampleSource
 
   void getInfo(int32_t *rate, int32_t *channels, int32_t *bits);
   size_t read(void *data, size_t length);
+
+  void seek(size_t pos) const { sample->setPosition(pos); }
+  size_t tell() const { return sample->getPosition(); }
+  size_t size() const { return sample->getLength(); }
 };
 
 #include "loadertemplate.h"