mpd/test/run_encoder.cxx

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

#include "encoder/EncoderList.hxx"
#include "encoder/EncoderPlugin.hxx"
#include "encoder/EncoderInterface.hxx"
#include "encoder/ToOutputStream.hxx"
#include "pcm/AudioFormat.hxx"
#include "pcm/AudioParser.hxx"
#include "config/Block.hxx"
#include "io/StdioOutputStream.hxx"
#include "util/PrintException.hxx"

#include <exception>
#include <memory>

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

int main(int argc, char **argv)
try {
	const char *encoder_name;

	/* parse command line */

	if (argc > 3) {
		fprintf(stderr,
			"Usage: run_encoder [ENCODER] [FORMAT] <IN >OUT\n");
		return EXIT_FAILURE;
	}

	if (argc > 1)
		encoder_name = argv[1];
	else
		encoder_name = "vorbis";

	/* create the encoder */

	const auto plugin = encoder_plugin_get(encoder_name);
	if (plugin == nullptr) {
		fprintf(stderr, "No such encoder: %s\n", encoder_name);
		return EXIT_FAILURE;
	}

	ConfigBlock block;
	block.AddBlockParam("quality", "5.0", -1);

	std::unique_ptr<PreparedEncoder> p_encoder(encoder_init(*plugin, block));

	/* open the encoder */

	AudioFormat audio_format(44100, SampleFormat::S16, 2);
	if (argc > 2)
		audio_format = ParseAudioFormat(argv[2], false);

	std::unique_ptr<Encoder> encoder(p_encoder->Open(audio_format));

	StdioOutputStream os(stdout);

	EncoderToOutputStream(os, *encoder);

	/* do it */

	static std::byte buffer[32768];
	ssize_t nbytes;
	while ((nbytes = read(0, buffer, sizeof(buffer))) > 0) {
		encoder->Write(std::span{buffer}.first(nbytes));
		EncoderToOutputStream(os, *encoder);
	}

	encoder->End();
	EncoderToOutputStream(os, *encoder);

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