pcm/PcmDop: use size_t

src/pcm/PcmDop.cxx

@@ -46,19 +46,19 @@ pcm_dsd_to_dop(PcmBuffer &buffer, unsigned channels,
 	assert(audio_valid_channel_count(channels));
 	assert(_src.size % channels == 0);
 
-	const unsigned num_src_samples = _src.size;
-	const unsigned num_src_frames = num_src_samples / channels;
+	const size_t num_src_samples = _src.size;
+	const size_t num_src_frames = num_src_samples / channels;
 
 	/* this rounds down and discards the last odd frame; not
 	   elegant, but good enough for now */
-	const unsigned num_frames = num_src_frames / 2;
-	const unsigned num_samples = num_frames * channels;
+	const size_t num_frames = num_src_frames / 2;
+	const size_t num_samples = num_frames * channels;
 
 	uint32_t *const dest0 = (uint32_t *)buffer.GetT<uint32_t>(num_samples),
 		*dest = dest0;
 
 	auto src = _src.data;
-	for (unsigned i = num_frames / 2; i > 0; --i) {
+	for (size_t i = num_frames / 2; i > 0; --i) {
 		for (unsigned c = channels; c > 0; --c) {
 			/* each 24 bit sample has 16 DSD sample bits
 			   plus the magic 0x05 marker */