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/*
* Copyright 2003-2018 The Music Player Daemon Project
* http://www.musicpd.org
*
* This program is free software; you can redistribute it and/or modify
* it under the terms of the GNU General Public License as published by
* the Free Software Foundation; either version 2 of the License, or
* (at your option) any later version.
*
* This program is distributed in the hope that it will useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
* GNU General Public License for more details.
*
* You should have received a copy of the GNU General Public License along
* with this program; if not, write to the Free Software Foundation, Inc.,
* 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA.
*/
#include "output/Interface.hxx"
#include "output/Registry.hxx"
#include "output/OutputPlugin.hxx"
#include "config/Param.hxx"
#include "config/Data.hxx"
#include "config/File.hxx"
#include "config/Migrate.hxx"
#include "config/Option.hxx"
#include "config/Block.hxx"
#include "event/Thread.hxx"
#include "fs/Path.hxx"
#include "AudioParser.hxx"
#include "pcm/PcmConvert.hxx"
#include "util/StringBuffer.hxx"
#include "util/RuntimeError.hxx"
#include "util/ScopeExit.hxx"
#include "util/PrintException.hxx"
#include <memory>
#include <assert.h>
#include <string.h>
#include <unistd.h>
#include <stdlib.h>
#include <stdio.h>
static std::unique_ptr<AudioOutput>
LoadAudioOutput(const ConfigData &config, EventLoop &event_loop,
const char *name)
{
const auto *block = config.FindBlock(ConfigBlockOption::AUDIO_OUTPUT,
"name", name);
if (block == nullptr)
throw FormatRuntimeError("No such configured audio output: %s",
name);
const char *plugin_name = block->GetBlockValue("type");
if (plugin_name == nullptr)
throw std::runtime_error("Missing \"type\" configuration");
const auto *plugin = AudioOutputPlugin_get(plugin_name);
if (plugin == nullptr)
throw FormatRuntimeError("No such audio output plugin: %s",
plugin_name);
return std::unique_ptr<AudioOutput>(ao_plugin_init(event_loop, *plugin,
*block));
}
static void
run_output(AudioOutput &ao, AudioFormat audio_format)
{
/* open the audio output */
ao.Enable();
AtScopeExit(&ao) { ao.Disable(); };
ao.Open(audio_format);
AtScopeExit(&ao) { ao.Close(); };
fprintf(stderr, "audio_format=%s\n",
ToString(audio_format).c_str());
size_t frame_size = audio_format.GetFrameSize();
/* play */
size_t length = 0;
char buffer[4096];
while (true) {
if (length < sizeof(buffer)) {
ssize_t nbytes = read(0, buffer + length,
sizeof(buffer) - length);
if (nbytes <= 0)
break;
length += (size_t)nbytes;
}
size_t play_length = (length / frame_size) * frame_size;
if (play_length > 0) {
size_t consumed = ao.Play(buffer, play_length);
assert(consumed <= length);
assert(consumed % frame_size == 0);
length -= consumed;
memmove(buffer, buffer + consumed, length);
}
}
}
int main(int argc, char **argv)
try {
if (argc < 3 || argc > 4) {
fprintf(stderr, "Usage: run_output CONFIG NAME [FORMAT] <IN\n");
return EXIT_FAILURE;
}
const Path config_path = Path::FromFS(argv[1]);
AudioFormat audio_format(44100, SampleFormat::S16, 2);
/* read configuration file (mpd.conf) */
ConfigData config;
ReadConfigFile(config, config_path);
Migrate(config);
EventThread io_thread;
io_thread.Start();
/* initialize the audio output */
auto ao = LoadAudioOutput(config, io_thread.GetEventLoop(), argv[2]);
/* parse the audio format */
if (argc > 3)
audio_format = ParseAudioFormat(argv[3], false);
/* do it */
run_output(*ao, audio_format);
/* cleanup and exit */
return EXIT_SUCCESS;
} catch (...) {
PrintException(std::current_exception());
return EXIT_FAILURE;
}
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