output/alsa, pcm: rename "DSD over USB" to "DoP"

The standard has been renamed since the early draft that was
implemented in MPD.

1 files changed, 0 insertions, 96 deletions

diff --git a/src/pcm/PcmDsdUsb.cxx b/src/pcm/PcmDsdUsb.cxx
deleted file mode 100644
index 9b854ad07..000000000
--- a/src/pcm/PcmDsdUsb.cxx
+++ /dev/null
@@ -1,96 +0,0 @@
-/*
- * Copyright (C) 2003-2014 The Music Player Daemon Project
- * http://www.musicpd.org
- *
- * This program is free software; you can redistribute it and/or modify
- * it under the terms of the GNU General Public License as published by
- * the Free Software Foundation; either version 2 of the License, or
- * (at your option) any later version.
- *
- * This program is distributed in the hope that it will be useful,
- * but WITHOUT ANY WARRANTY; without even the implied warranty of
- * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
- * GNU General Public License for more details.
- *
- * You should have received a copy of the GNU General Public License along
- * with this program; if not, write to the Free Software Foundation, Inc.,
- * 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA.
- */
-
-#include "config.h"
-#include "PcmDsdUsb.hxx"
-#include "PcmBuffer.hxx"
-#include "AudioFormat.hxx"
-#include "util/ConstBuffer.hxx"
-
-#include <assert.h>
-
-constexpr
-static inline uint32_t
-pcm_two_dsd_to_usb_marker1(uint8_t a, uint8_t b)
-{
-	return 0xff050000 | (a << 8) | b;
-}
-
-constexpr
-static inline uint32_t
-pcm_two_dsd_to_usb_marker2(uint8_t a, uint8_t b)
-{
-	return 0xfffa0000 | (a << 8) | b;
-}
-
-ConstBuffer<uint32_t>
-pcm_dsd_to_usb(PcmBuffer &buffer, unsigned channels,
-	       ConstBuffer<uint8_t> _src)
-{
-	assert(audio_valid_channel_count(channels));
-	assert(!_src.IsNull());
-	assert(_src.size > 0);
-	assert(_src.size % channels == 0);
-
-	const unsigned num_src_samples = _src.size;
-	const unsigned 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;
-
-	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 (unsigned c = channels; c > 0; --c) {
-			/* each 24 bit sample has 16 DSD sample bits
-			   plus the magic 0x05 marker */
-
-			*dest++ = pcm_two_dsd_to_usb_marker1(src[0], src[channels]);
-
-			/* seek the source pointer to the next
-			   channel */
-			++src;
-		}
-
-		/* skip the second byte of each channel, because we
-		   have already copied it */
-		src += channels;
-
-		for (unsigned c = channels; c > 0; --c) {
-			/* each 24 bit sample has 16 DSD sample bits
-			   plus the magic 0xfa marker */
-
-			*dest++ = pcm_two_dsd_to_usb_marker2(src[0], src[channels]);
-
-			/* seek the source pointer to the next
-			   channel */
-			++src;
-		}
-
-		/* skip the second byte of each channel, because we
-		   have already copied it */
-		src += channels;
-	}
-
-	return { dest0, num_samples };
-}