116 lines
2.9 KiB
C++
116 lines
2.9 KiB
C++
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/*
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* Copyright (C) 2003-2013 The Music Player Daemon Project
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* http://www.musicpd.org
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*
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* This program is free software; you can redistribute it and/or modify
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* it under the terms of the GNU General Public License as published by
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* the Free Software Foundation; either version 2 of the License, or
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* (at your option) any later version.
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*
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* This program is distributed in the hope that it will be useful,
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* but WITHOUT ANY WARRANTY; without even the implied warranty of
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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* GNU General Public License for more details.
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*
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* You should have received a copy of the GNU General Public License along
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* with this program; if not, write to the Free Software Foundation, Inc.,
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* 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA.
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*/
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#include "config.h"
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#include "ChannelsConverter.hxx"
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#include "PcmChannels.hxx"
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#include "PcmConvert.hxx"
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#include "util/ConstBuffer.hxx"
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#include "util/Error.hxx"
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#include <assert.h>
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bool
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PcmChannelsConverter::Open(SampleFormat _format,
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unsigned _src_channels, unsigned _dest_channels,
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gcc_unused Error &error)
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{
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assert(_format != SampleFormat::UNDEFINED);
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switch (_format) {
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case SampleFormat::S16:
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case SampleFormat::S24_P32:
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case SampleFormat::S32:
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case SampleFormat::FLOAT:
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break;
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default:
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error.Format(pcm_convert_domain,
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"PCM channel conversion for %s is not implemented",
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sample_format_to_string(format));
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return false;
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}
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format = _format;
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src_channels = _src_channels;
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dest_channels = _dest_channels;
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return true;
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}
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void
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PcmChannelsConverter::Close()
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{
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#ifndef NDEBUG
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format = SampleFormat::UNDEFINED;
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#endif
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}
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ConstBuffer<void>
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PcmChannelsConverter::Convert(ConstBuffer<void> src, Error &error)
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{
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const void *result = nullptr;
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size_t result_size = 0;
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switch (format) {
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case SampleFormat::UNDEFINED:
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case SampleFormat::S8:
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case SampleFormat::DSD:
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assert(false);
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gcc_unreachable();
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case SampleFormat::S16:
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result = pcm_convert_channels_16(buffer, dest_channels,
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src_channels,
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(const int16_t *)src.data,
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src.size, &result_size);
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break;
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case SampleFormat::S24_P32:
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result = pcm_convert_channels_24(buffer, dest_channels,
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src_channels,
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(const int32_t *)src.data,
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src.size, &result_size);
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break;
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case SampleFormat::S32:
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result = pcm_convert_channels_32(buffer, dest_channels,
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src_channels,
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(const int32_t *)src.data,
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src.size, &result_size);
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break;
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case SampleFormat::FLOAT:
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result = pcm_convert_channels_float(buffer, dest_channels,
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src_channels,
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(const float *)src.data,
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src.size, &result_size);
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break;
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}
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if (result == nullptr) {
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error.Format(pcm_convert_domain,
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"Conversion from %u to %u channels "
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"is not implemented",
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src_channels, dest_channels);
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return nullptr;
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}
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return { result, result_size };
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}
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