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149 lines
3.0 KiB
C++
149 lines
3.0 KiB
C++
// SPDX-License-Identifier: GPL-2.0-or-later
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// Copyright The Music Player Daemon Project
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/*
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* This program is a command line interface to MPD's PCM conversion
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* library (pcm_convert.c).
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*
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*/
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#include "ConfigGlue.hxx"
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#include "pcm/AudioParser.hxx"
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#include "pcm/AudioFormat.hxx"
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#include "pcm/Convert.hxx"
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#include "fs/Path.hxx"
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#include "fs/NarrowPath.hxx"
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#include "io/FileDescriptor.hxx"
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#include "util/StaticFifoBuffer.hxx"
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#include "cmdline/OptionDef.hxx"
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#include "cmdline/OptionParser.hxx"
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#include "util/PrintException.hxx"
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#include "Log.hxx"
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#include "LogBackend.hxx"
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#include <cassert>
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#include <stdexcept>
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#include <stddef.h>
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#include <stdlib.h>
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#include <stdio.h>
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#include <unistd.h>
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struct CommandLine {
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AudioFormat in_audio_format, out_audio_format;
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FromNarrowPath config_path;
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bool verbose = false;
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};
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enum Option {
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OPTION_CONFIG,
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OPTION_VERBOSE,
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};
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static constexpr OptionDef option_defs[] = {
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{"config", 0, true, "Load a MPD configuration file"},
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{"verbose", 'v', false, "Verbose logging"},
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};
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static CommandLine
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ParseCommandLine(int argc, char **argv)
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{
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CommandLine c;
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OptionParser option_parser(option_defs, argc, argv);
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while (auto o = option_parser.Next()) {
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switch (Option(o.index)) {
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case OPTION_CONFIG:
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c.config_path = o.value;
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break;
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case OPTION_VERBOSE:
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c.verbose = true;
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break;
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}
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}
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auto args = option_parser.GetRemaining();
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if (args.size() != 2)
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throw std::runtime_error("Usage: run_convert IN_FORMAT OUT_FORMAT <IN >OUT");
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c.in_audio_format = ParseAudioFormat(args[0], false);
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c.out_audio_format = c.in_audio_format.WithMask(ParseAudioFormat(args[1], false));
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return c;
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}
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class GlobalInit {
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const ConfigData config;
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public:
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explicit GlobalInit(Path config_path)
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:config(AutoLoadConfigFile(config_path))
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{
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pcm_convert_global_init(config);
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}
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};
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static void
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RunConvert(PcmConvert &convert, size_t in_frame_size,
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FileDescriptor in_fd, FileDescriptor out_fd)
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{
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in_fd.SetBinaryMode();
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out_fd.SetBinaryMode();
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StaticFifoBuffer<std::byte, 4096> buffer;
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while (true) {
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{
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const auto dest = buffer.Write();
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assert(!dest.empty());
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ssize_t nbytes = in_fd.Read(dest);
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if (nbytes <= 0)
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break;
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buffer.Append(nbytes);
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}
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auto src = buffer.Read();
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assert(!src.empty());
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src = src.first(src.size() - src.size() % in_frame_size);
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if (src.empty())
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continue;
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buffer.Consume(src.size());
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auto output = convert.Convert(src);
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out_fd.FullWrite(output);
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}
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while (true) {
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auto output = convert.Flush();
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if (output.data() == nullptr)
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break;
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out_fd.FullWrite(output);
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}
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}
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int
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main(int argc, char **argv)
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try {
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const auto c = ParseCommandLine(argc, argv);
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SetLogThreshold(c.verbose ? LogLevel::DEBUG : LogLevel::INFO);
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const GlobalInit init(c.config_path);
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PcmConvert state(c.in_audio_format, c.out_audio_format);
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RunConvert(state, c.in_audio_format.GetFrameSize(),
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FileDescriptor(STDIN_FILENO),
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FileDescriptor(STDOUT_FILENO));
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return EXIT_SUCCESS;
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} catch (...) {
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PrintException(std::current_exception());
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return EXIT_FAILURE;
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}
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