d32f49a90b
To keep I/O nastiness and latencies away from the core, move the audio output code to a separate thread, one per output. The thread is created on demand, and currently runs until mpd exits.
100 lines
2.4 KiB
C
100 lines
2.4 KiB
C
/* the Music Player Daemon (MPD)
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* Copyright (C) 2003-2007 by Warren Dukes (warren.dukes@gmail.com)
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* Copyright (C) 2008 Max Kellermann <max@duempel.org>
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* This project's homepage is: 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 be 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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* You should have received a copy of the GNU General Public License
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* along with this program; if not, write to the Free Software
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* Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
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*/
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#ifndef OUTPUT_API_H
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#define OUTPUT_API_H
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#include "../config.h"
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#include "pcm_utils.h"
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#include "audio_format.h"
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#include "tag.h"
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#include "conf.h"
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#include "log.h"
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#include "notify.h"
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#include "os_compat.h"
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#define DISABLED_AUDIO_OUTPUT_PLUGIN(plugin) const struct audio_output_plugin plugin;
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struct audio_output;
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struct audio_output_plugin {
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const char *name;
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int (*test_default_device)(void);
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int (*init)(struct audio_output *ao, ConfigParam *param);
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void (*finish)(struct audio_output *ao);
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int (*open)(struct audio_output *ao);
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int (*play)(struct audio_output *ao,
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const char *playChunk, size_t size);
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void (*cancel)(struct audio_output *ao);
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void (*close)(struct audio_output *ao);
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void (*send_tag)(struct audio_output *audioOutput,
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const struct tag *tag);
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};
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enum audio_output_command {
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AO_COMMAND_NONE = 0,
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AO_COMMAND_OPEN,
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AO_COMMAND_CLOSE,
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AO_COMMAND_PLAY,
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AO_COMMAND_CANCEL,
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AO_COMMAND_SEND_TAG,
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AO_COMMAND_KILL
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};
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struct audio_output {
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int open;
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const char *name;
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const struct audio_output_plugin *plugin;
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struct audio_format inAudioFormat;
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struct audio_format outAudioFormat;
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struct audio_format reqAudioFormat;
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ConvState convState;
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char *convBuffer;
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size_t convBufferLen;
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pthread_t thread;
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struct notify notify;
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enum audio_output_command command;
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union {
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struct {
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const char *data;
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size_t size;
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} play;
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const struct tag *tag;
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} args;
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int result;
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void *data;
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};
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extern struct notify audio_output_client_notify;
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#endif
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