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79 lines
1.7 KiB
C++
79 lines
1.7 KiB
C++
// SPDX-License-Identifier: GPL-2.0-or-later
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// Copyright The Music Player Daemon Project
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#include "FormatConverter.hxx"
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#include "PcmFormat.hxx"
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#include "lib/fmt/AudioFormatFormatter.hxx"
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#include "lib/fmt/RuntimeError.hxx"
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#include <cassert>
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#include <utility> // for std::unreachable()
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void
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PcmFormatConverter::Open(SampleFormat _src_format, SampleFormat _dest_format)
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{
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assert(_src_format != SampleFormat::UNDEFINED);
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assert(_dest_format != SampleFormat::UNDEFINED);
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switch (_dest_format) {
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case SampleFormat::UNDEFINED:
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std::unreachable();
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case SampleFormat::S8:
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case SampleFormat::DSD:
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throw FmtRuntimeError("PCM conversion from {} to {} is not implemented",
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_src_format, _dest_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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}
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src_format = _src_format;
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dest_format = _dest_format;
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}
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void
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PcmFormatConverter::Close() noexcept
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{
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#ifndef NDEBUG
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src_format = SampleFormat::UNDEFINED;
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dest_format = SampleFormat::UNDEFINED;
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#endif
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}
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std::span<const std::byte>
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PcmFormatConverter::Convert(std::span<const std::byte> src) noexcept
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{
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switch (dest_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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std::unreachable();
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case SampleFormat::S16:
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return std::as_bytes(pcm_convert_to_16(buffer, dither,
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src_format,
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src));
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case SampleFormat::S24_P32:
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return std::as_bytes(pcm_convert_to_24(buffer,
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src_format,
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src));
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case SampleFormat::S32:
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return std::as_bytes(pcm_convert_to_32(buffer,
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src_format,
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src));
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case SampleFormat::FLOAT:
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return std::as_bytes(pcm_convert_to_float(buffer,
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src_format,
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src));
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}
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std::unreachable();
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}
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