From c654c7630aad220a4935c34b076e107b6b0561a5 Mon Sep 17 00:00:00 2001 From: Max Kellermann Date: Tue, 9 Apr 2013 01:24:52 +0200 Subject: pcm_*: move to src/pcm/ --- src/pcm_dsd_usb.c | 97 ------------------------------------------------------- 1 file changed, 97 deletions(-) delete mode 100644 src/pcm_dsd_usb.c (limited to 'src/pcm_dsd_usb.c') diff --git a/src/pcm_dsd_usb.c b/src/pcm_dsd_usb.c deleted file mode 100644 index 4b5e39f39..000000000 --- a/src/pcm_dsd_usb.c +++ /dev/null @@ -1,97 +0,0 @@ -/* - * Copyright (C) 2003-2012 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 "pcm_dsd_usb.h" -#include "pcm_buffer.h" -#include "audio_format.h" - -G_GNUC_CONST -static inline uint32_t -pcm_two_dsd_to_usb_marker1(uint8_t a, uint8_t b) -{ - return 0xff050000 | (a << 8) | b; -} - -G_GNUC_CONST -static inline uint32_t -pcm_two_dsd_to_usb_marker2(uint8_t a, uint8_t b) -{ - return 0xfffa0000 | (a << 8) | b; -} - - -const uint32_t * -pcm_dsd_to_usb(struct pcm_buffer *buffer, unsigned channels, - const uint8_t *src, size_t src_size, - size_t *dest_size_r) -{ - assert(buffer != NULL); - assert(audio_valid_channel_count(channels)); - assert(src != NULL); - 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; - - const size_t dest_size = num_samples * 4; - *dest_size_r = dest_size; - uint32_t *const dest0 = pcm_buffer_get(buffer, dest_size), - *dest = dest0; - - 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; -} -- cgit v1.2.3