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/* the Music Player Daemon (MPD)
* Copyright (C) 2003-2007 by Warren Dukes (warren.dukes@gmail.com)
* Copyright (C) 2008 Max Kellermann <max@duempel.org>
* This project's homepage is: 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 be 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., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
*/
#ifndef OUTPUT_INTERNAL_H
#define OUTPUT_INTERNAL_H
#include "pcm_utils.h"
#include "notify.h"
struct audio_output {
/**
* The device's configured display name.
*/
const char *name;
/**
* The plugin which implements this output device.
*/
const struct audio_output_plugin *plugin;
/**
* The plugin's internal data. It is passed to every plugin
* method.
*/
void *data;
/**
* Is the device (already) open and functional?
*/
int open;
/**
* The audio_format in which audio data is received from the
* player thread (which in turn receives it from the decoder).
*/
struct audio_format inAudioFormat;
/**
* The audio_format which is really sent to the device. This
* is basically reqAudioFormat (if configured) or
* inAudioFormat, but may have been modified by
* plugin->open().
*/
struct audio_format outAudioFormat;
/**
* The audio_format which was configured. Only set if
* convertAudioFormat is true.
*/
struct audio_format reqAudioFormat;
struct pcm_convert_state convState;
char *convBuffer;
size_t convBufferLen;
/**
* The thread handle, or "0" if the output thread isn't
* running.
*/
pthread_t thread;
/**
* Notify object for the thread.
*/
struct notify notify;
/**
* The next command to be performed by the output thread.
*/
enum audio_output_command command;
/**
* Command arguments, depending on the command.
*/
union {
struct {
const char *data;
size_t size;
} play;
const struct tag *tag;
} args;
/**
* Result value of the command. Generally, "0" means success.
*/
int result;
};
/**
* Notify object used by the thread's client, i.e. we will send a
* notify signal to this object, expecting the caller to wait on it.
*/
extern struct notify audio_output_client_notify;
static inline int
audio_output_is_open(const struct audio_output *ao)
{
return ao->open;
}
static inline int
audio_output_command_is_finished(const struct audio_output *ao)
{
return ao->command == AO_COMMAND_NONE;
}
static inline int
audio_output_get_result(const struct audio_output *ao)
{
return ao->result;
}
#endif
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