145 lines
3.6 KiB
C++
145 lines
3.6 KiB
C++
/*
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* Copyright 2003-2020 The Music Player Daemon Project
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* http://www.musicpd.org
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*
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* This program is free software; you can redistribute it and/or modify
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* it under the terms of the GNU General Public License as published by
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* the Free Software Foundation; either version 2 of the License, or
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* (at your option) any later version.
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*
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* This program is distributed in the hope that it will useful,
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* but WITHOUT ANY WARRANTY; without even the implied warranty of
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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* GNU General Public License for more details.
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*
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* You should have received a copy of the GNU General Public License along
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* with this program; if not, write to the Free Software Foundation, Inc.,
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* 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA.
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*/
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#include "output/Interface.hxx"
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#include "output/Registry.hxx"
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#include "output/OutputPlugin.hxx"
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#include "ConfigGlue.hxx"
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#include "event/Thread.hxx"
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#include "fs/Path.hxx"
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#include "pcm/AudioParser.hxx"
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#include "pcm/AudioFormat.hxx"
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#include "util/StringBuffer.hxx"
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#include "util/RuntimeError.hxx"
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#include "util/ScopeExit.hxx"
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#include "util/PrintException.hxx"
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#include <memory>
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#include <assert.h>
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#include <string.h>
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#include <unistd.h>
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#include <stdlib.h>
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#include <stdio.h>
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static std::unique_ptr<AudioOutput>
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LoadAudioOutput(const ConfigData &config, EventLoop &event_loop,
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const char *name)
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{
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const auto *block = config.FindBlock(ConfigBlockOption::AUDIO_OUTPUT,
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"name", name);
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if (block == nullptr)
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throw FormatRuntimeError("No such configured audio output: %s",
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name);
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const char *plugin_name = block->GetBlockValue("type");
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if (plugin_name == nullptr)
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throw std::runtime_error("Missing \"type\" configuration");
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const auto *plugin = AudioOutputPlugin_get(plugin_name);
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if (plugin == nullptr)
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throw FormatRuntimeError("No such audio output plugin: %s",
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plugin_name);
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return std::unique_ptr<AudioOutput>(ao_plugin_init(event_loop, *plugin,
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*block));
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}
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static void
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run_output(AudioOutput &ao, AudioFormat audio_format)
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{
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/* open the audio output */
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ao.Enable();
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AtScopeExit(&ao) { ao.Disable(); };
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ao.Open(audio_format);
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AtScopeExit(&ao) { ao.Close(); };
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fprintf(stderr, "audio_format=%s\n",
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ToString(audio_format).c_str());
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size_t frame_size = audio_format.GetFrameSize();
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/* play */
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size_t length = 0;
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char buffer[4096];
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while (true) {
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if (length < sizeof(buffer)) {
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ssize_t nbytes = read(0, buffer + length,
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sizeof(buffer) - length);
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if (nbytes <= 0)
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break;
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length += (size_t)nbytes;
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}
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size_t play_length = (length / frame_size) * frame_size;
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if (play_length > 0) {
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size_t consumed = ao.Play(buffer, play_length);
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assert(consumed <= length);
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assert(consumed % frame_size == 0);
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length -= consumed;
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memmove(buffer, buffer + consumed, length);
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}
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}
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}
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int main(int argc, char **argv)
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try {
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if (argc < 3 || argc > 4) {
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fprintf(stderr, "Usage: run_output CONFIG NAME [FORMAT] <IN\n");
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return EXIT_FAILURE;
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}
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const Path config_path = Path::FromFS(argv[1]);
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AudioFormat audio_format(44100, SampleFormat::S16, 2);
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/* read configuration file (mpd.conf) */
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const auto config = AutoLoadConfigFile(config_path);
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EventThread io_thread;
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io_thread.Start();
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/* initialize the audio output */
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auto ao = LoadAudioOutput(config, io_thread.GetEventLoop(), argv[2]);
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/* parse the audio format */
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if (argc > 3)
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audio_format = ParseAudioFormat(argv[3], false);
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/* do it */
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run_output(*ao, audio_format);
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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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