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// SPDX-License-Identifier: GPL-2.0-or-later
// Copyright The Music Player Daemon Project
#include "ConfigGlue.hxx"
#include "ReadFrames.hxx"
#include "cmdline/OptionDef.hxx"
#include "cmdline/OptionParser.hxx"
#include "lib/fmt/AudioFormatFormatter.hxx"
#include "lib/fmt/RuntimeError.hxx"
#include "fs/Path.hxx"
#include "fs/NarrowPath.hxx"
#include "filter/LoadOne.hxx"
#include "filter/Filter.hxx"
#include "filter/Prepared.hxx"
#include "pcm/AudioParser.hxx"
#include "pcm/AudioFormat.hxx"
#include "pcm/Volume.hxx"
#include "mixer/Control.hxx"
#include "system/Error.hxx"
#include "io/FileDescriptor.hxx"
#include "util/StringBuffer.hxx"
#include "util/PrintException.hxx"
#include "LogBackend.hxx"
#include <cassert>
#include <memory>
#include <stdexcept>
#include <string.h>
#include <stdlib.h>
struct CommandLine {
FromNarrowPath config_path;
const char *filter_name = nullptr;
AudioFormat audio_format{44100, SampleFormat::S16, 2};
bool verbose = false;
};
enum Option {
OPTION_VERBOSE,
};
static constexpr OptionDef option_defs[] = {
{"verbose", 'v', false, "Verbose logging"},
};
static CommandLine
ParseCommandLine(int argc, char **argv)
{
CommandLine c;
OptionParser option_parser(option_defs, argc, argv);
while (auto o = option_parser.Next()) {
switch (Option(o.index)) {
case OPTION_VERBOSE:
c.verbose = true;
break;
}
}
auto args = option_parser.GetRemaining();
if (args.size() < 2 || args.size() > 3)
throw std::runtime_error("Usage: run_filter CONFIG NAME [FORMAT] <IN");
c.config_path = args[0];
c.filter_name = args[1];
if (args.size() > 2)
c.audio_format = ParseAudioFormat(args[2], false);
return c;
}
static std::unique_ptr<PreparedFilter>
LoadFilter(const ConfigData &config, const char *name)
{
const auto *param = config.FindBlock(ConfigBlockOption::AUDIO_FILTER,
"name", name);
if (param == nullptr)
throw FmtRuntimeError("No such configured filter: {}",
name);
return filter_configured_new(*param);
}
int main(int argc, char **argv)
try {
const auto c = ParseCommandLine(argc, argv);
SetLogThreshold(c.verbose ? LogLevel::DEBUG : LogLevel::INFO);
/* read configuration file (mpd.conf) */
const auto config = AutoLoadConfigFile(c.config_path);
auto audio_format = c.audio_format;
const size_t in_frame_size = audio_format.GetFrameSize();
/* initialize the filter */
auto prepared_filter = LoadFilter(config, argv[2]);
/* open the filter */
auto filter = prepared_filter->Open(audio_format);
const AudioFormat out_audio_format = filter->GetOutAudioFormat();
fmt::print(stderr, "audio_format={}\n", out_audio_format);
/* play */
FileDescriptor input_fd(STDIN_FILENO);
FileDescriptor output_fd(STDOUT_FILENO);
while (true) {
std::byte buffer[4096];
ssize_t nbytes = ReadFrames(input_fd, buffer, sizeof(buffer),
in_frame_size);
if (nbytes == 0)
break;
for (auto dest = filter->FilterPCM(std::span{buffer}.first(nbytes));
!dest.empty(); dest = filter->ReadMore())
output_fd.FullWrite(dest);
}
while (true) {
auto dest = filter->Flush();
if (dest.empty())
break;
output_fd.FullWrite(dest);
}
/* cleanup and exit */
return EXIT_SUCCESS;
} catch (...) {
PrintException(std::current_exception());
return EXIT_FAILURE;
}
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