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144 lines
3.2 KiB
C++
144 lines
3.2 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 "ConfigGlue.hxx"
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#include "ReadFrames.hxx"
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#include "cmdline/OptionDef.hxx"
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#include "cmdline/OptionParser.hxx"
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#include "lib/fmt/AudioFormatFormatter.hxx"
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#include "lib/fmt/RuntimeError.hxx"
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#include "fs/Path.hxx"
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#include "fs/NarrowPath.hxx"
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#include "filter/LoadOne.hxx"
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#include "filter/Filter.hxx"
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#include "filter/Prepared.hxx"
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#include "pcm/AudioParser.hxx"
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#include "pcm/AudioFormat.hxx"
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#include "pcm/Volume.hxx"
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#include "mixer/Control.hxx"
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#include "system/Error.hxx"
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#include "io/FileDescriptor.hxx"
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#include "util/StringBuffer.hxx"
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#include "util/PrintException.hxx"
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#include "LogBackend.hxx"
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#include <cassert>
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#include <memory>
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#include <stdexcept>
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#include <string.h>
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#include <stdlib.h>
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struct CommandLine {
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FromNarrowPath config_path;
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const char *filter_name = nullptr;
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AudioFormat audio_format{44100, SampleFormat::S16, 2};
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bool verbose = false;
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};
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enum Option {
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OPTION_VERBOSE,
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};
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static constexpr OptionDef option_defs[] = {
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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_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 || args.size() > 3)
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throw std::runtime_error("Usage: run_filter CONFIG NAME [FORMAT] <IN");
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c.config_path = args[0];
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c.filter_name = args[1];
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if (args.size() > 2)
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c.audio_format = ParseAudioFormat(args[2], false);
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return c;
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}
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static std::unique_ptr<PreparedFilter>
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LoadFilter(const ConfigData &config, const char *name)
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{
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const auto *param = config.FindBlock(ConfigBlockOption::AUDIO_FILTER,
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"name", name);
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if (param == nullptr)
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throw FmtRuntimeError("No such configured filter: {}",
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name);
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return filter_configured_new(*param);
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}
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int 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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/* read configuration file (mpd.conf) */
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const auto config = AutoLoadConfigFile(c.config_path);
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auto audio_format = c.audio_format;
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const size_t in_frame_size = audio_format.GetFrameSize();
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/* initialize the filter */
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auto prepared_filter = LoadFilter(config, argv[2]);
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/* open the filter */
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auto filter = prepared_filter->Open(audio_format);
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const AudioFormat out_audio_format = filter->GetOutAudioFormat();
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fmt::print(stderr, "audio_format={}\n", out_audio_format);
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/* play */
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FileDescriptor input_fd(STDIN_FILENO);
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FileDescriptor output_fd(STDOUT_FILENO);
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while (true) {
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std::byte buffer[4096];
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ssize_t nbytes = ReadFrames(input_fd, buffer, sizeof(buffer),
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in_frame_size);
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if (nbytes == 0)
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break;
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for (auto dest = filter->FilterPCM(std::span{buffer}.first(nbytes));
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!dest.empty(); dest = filter->ReadMore())
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output_fd.FullWrite(dest);
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}
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while (true) {
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auto dest = filter->Flush();
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if (dest.empty())
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break;
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output_fd.FullWrite(dest);
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}
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/* cleanup and exit */
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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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