mpd/test/dump_rva2.cxx

// SPDX-License-Identifier: GPL-2.0-or-later
// Copyright The Music Player Daemon Project

#include "config.h"
#include "tag/Id3Load.hxx"
#include "tag/Rva2.hxx"
#include "tag/ReplayGainInfo.hxx"
#include "thread/Mutex.hxx"
#include "fs/Path.hxx"
#include "fs/NarrowPath.hxx"
#include "input/InputStream.hxx"
#include "input/LocalOpen.hxx"
#include "util/PrintException.hxx"

#include <id3tag.h>

#ifdef HAVE_LOCALE_H
#include <locale.h>
#endif

#include <stdlib.h>
#include <stdio.h>

static void
DumpReplayGainTuple(const char *name, const ReplayGainTuple &tuple)
{
	if (tuple.IsDefined())
		fprintf(stderr, "replay_gain[%s]: gain=%f peak=%f\n",
			name, (double)tuple.gain, (double)tuple.peak);
}

static void
DumpReplayGainInfo(const ReplayGainInfo &info)
{
	DumpReplayGainTuple("album", info.album);
	DumpReplayGainTuple("track", info.track);
}

int main(int argc, char **argv)
try {
#ifdef HAVE_LOCALE_H
	/* initialize locale */
	setlocale(LC_CTYPE,"");
#endif

	if (argc != 2) {
		fprintf(stderr, "Usage: read_rva2 FILE\n");
		return EXIT_FAILURE;
	}

	const FromNarrowPath path = argv[1];

	Mutex mutex;

	auto is = OpenLocalInputStream(path, mutex);

	const auto tag = tag_id3_load(*is);
	if (tag == nullptr) {
		fprintf(stderr, "No ID3 tag found\n");
		return EXIT_FAILURE;
	}

	ReplayGainInfo replay_gain;
	replay_gain.Clear();

	bool success = tag_rva2_parse(tag.get(), replay_gain);
	if (!success) {
		fprintf(stderr, "No RVA2 tag found\n");
		return EXIT_FAILURE;
	}

	DumpReplayGainInfo(replay_gain);

	return EXIT_SUCCESS;
} catch (...) {
	PrintException(std::current_exception());
	return EXIT_FAILURE;
}