AudioFormat: move enum SampleFormat to pcm/SampleFormat.hxx

src/AudioFormat.cxx

@@ -40,37 +40,6 @@ AudioFormat::ApplyMask(AudioFormat mask)
 	assert(IsValid());
 }
 
-const char *
-sample_format_to_string(SampleFormat format)
-{
-	switch (format) {
-	case SampleFormat::UNDEFINED:
-		return "?";
-
-	case SampleFormat::S8:
-		return "8";
-
-	case SampleFormat::S16:
-		return "16";
-
-	case SampleFormat::S24_P32:
-		return "24";
-
-	case SampleFormat::S32:
-		return "32";
-
-	case SampleFormat::FLOAT:
-		return "f";
-
-	case SampleFormat::DSD:
-		return "dsd";
-	}
-
-	/* unreachable */
-	assert(false);
-	gcc_unreachable();
-}
-
 const char *
 audio_format_to_string(const AudioFormat af,
 		       struct audio_format_string *s)