diff options
Diffstat (limited to 'src/pcm/ChannelsConverter.cxx')
-rw-r--r-- | src/pcm/ChannelsConverter.cxx | 97 |
1 files changed, 97 insertions, 0 deletions
diff --git a/src/pcm/ChannelsConverter.cxx b/src/pcm/ChannelsConverter.cxx new file mode 100644 index 000000000..8ffcbfe41 --- /dev/null +++ b/src/pcm/ChannelsConverter.cxx @@ -0,0 +1,97 @@ +/* + * Copyright (C) 2003-2013 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 "ChannelsConverter.hxx" +#include "PcmChannels.hxx" +#include "Domain.hxx" +#include "util/ConstBuffer.hxx" +#include "util/Error.hxx" + +#include <assert.h> + +bool +PcmChannelsConverter::Open(SampleFormat _format, + unsigned _src_channels, unsigned _dest_channels, + gcc_unused Error &error) +{ + assert(_format != SampleFormat::UNDEFINED); + + switch (_format) { + case SampleFormat::S16: + case SampleFormat::S24_P32: + case SampleFormat::S32: + case SampleFormat::FLOAT: + break; + + default: + error.Format(pcm_domain, + "PCM channel conversion for %s is not implemented", + sample_format_to_string(format)); + return false; + } + + format = _format; + src_channels = _src_channels; + dest_channels = _dest_channels; + return true; +} + +void +PcmChannelsConverter::Close() +{ +#ifndef NDEBUG + format = SampleFormat::UNDEFINED; +#endif +} + +ConstBuffer<void> +PcmChannelsConverter::Convert(ConstBuffer<void> src, gcc_unused Error &error) +{ + switch (format) { + case SampleFormat::UNDEFINED: + case SampleFormat::S8: + case SampleFormat::DSD: + assert(false); + gcc_unreachable(); + + case SampleFormat::S16: + return pcm_convert_channels_16(buffer, dest_channels, + src_channels, + ConstBuffer<int16_t>::FromVoid(src)).ToVoid(); + + case SampleFormat::S24_P32: + return pcm_convert_channels_24(buffer, dest_channels, + src_channels, + ConstBuffer<int32_t>::FromVoid(src)).ToVoid(); + + case SampleFormat::S32: + return pcm_convert_channels_32(buffer, dest_channels, + src_channels, + ConstBuffer<int32_t>::FromVoid(src)).ToVoid(); + + case SampleFormat::FLOAT: + return pcm_convert_channels_float(buffer, dest_channels, + src_channels, + ConstBuffer<float>::FromVoid(src)).ToVoid(); + } + + assert(false); + gcc_unreachable(); +} |