pcm/PcmConvert: remove unused attribute "dest_format"

src/pcm/PcmConvert.cxx

@@ -30,8 +30,8 @@ pcm_convert_global_init(const ConfigData &config)
 }
 
 PcmConvert::PcmConvert(const AudioFormat _src_format,
-		       const AudioFormat _dest_format)
-	:src_format(_src_format), dest_format(_dest_format)
+		       const AudioFormat dest_format)
+	:src_format(_src_format)
 {
 	assert(src_format.IsValid());
 	assert(dest_format.IsValid());
@@ -40,19 +40,19 @@ PcmConvert::PcmConvert(const AudioFormat _src_format,
 	if (format.format == SampleFormat::DSD)
 		format.format = SampleFormat::FLOAT;
 
-	enable_resampler = format.sample_rate != _dest_format.sample_rate;
+	enable_resampler = format.sample_rate != dest_format.sample_rate;
 	if (enable_resampler) {
-		resampler.Open(format, _dest_format.sample_rate);
+		resampler.Open(format, dest_format.sample_rate);
 
 		format.format = resampler.GetOutputSampleFormat();
-		format.sample_rate = _dest_format.sample_rate;
+		format.sample_rate = dest_format.sample_rate;
 	}
 
-	enable_format = format.format != _dest_format.format;
+	enable_format = format.format != dest_format.format;
 	if (enable_format) {
 		try {
 			format_converter.Open(format.format,
-					      _dest_format.format);
+					      dest_format.format);
 		} catch (...) {
 			if (enable_resampler)
 				resampler.Close();
@@ -60,13 +60,13 @@ PcmConvert::PcmConvert(const AudioFormat _src_format,
 		}
 	}
 
-	format.format = _dest_format.format;
+	format.format = dest_format.format;
 
-	enable_channels = format.channels != _dest_format.channels;
+	enable_channels = format.channels != dest_format.channels;
 	if (enable_channels) {
 		try {
 			channels_converter.Open(format.format, format.channels,
-						_dest_format.channels);
+						dest_format.channels);
 		} catch (...) {
 			if (enable_format)
 				format_converter.Close();

src/pcm/PcmConvert.hxx

@@ -47,7 +47,7 @@ class PcmConvert {
 	PcmFormatConverter format_converter;
 	PcmChannelsConverter channels_converter;
 
-	const AudioFormat src_format, dest_format;
+	const AudioFormat src_format;
 
 	bool enable_resampler, enable_format, enable_channels;