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/* the Music Player Daemon (MPD)
* 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
*/
#include "output_thread.h"
#include "output_api.h"
#include "output_internal.h"
#include "utils.h"
static void ao_command_finished(struct audio_output *ao)
{
assert(ao->command != AO_COMMAND_NONE);
ao->command = AO_COMMAND_NONE;
notify_signal(&audio_output_client_notify);
}
static void convertAudioFormat(struct audio_output *audioOutput,
const char **chunkArgPtr, size_t *sizeArgPtr)
{
size_t size = pcm_sizeOfConvBuffer(&(audioOutput->inAudioFormat),
*sizeArgPtr,
&(audioOutput->outAudioFormat));
if (size > audioOutput->convBufferLen) {
if (audioOutput->convBuffer != NULL)
free(audioOutput->convBuffer);
audioOutput->convBuffer = xmalloc(size);
audioOutput->convBufferLen = size;
}
*sizeArgPtr = pcm_convertAudioFormat(&(audioOutput->inAudioFormat),
*chunkArgPtr, *sizeArgPtr,
&(audioOutput->outAudioFormat),
audioOutput->convBuffer,
&audioOutput->convState);
*chunkArgPtr = audioOutput->convBuffer;
}
static void ao_play(struct audio_output *ao)
{
const char *data = ao->args.play.data;
size_t size = ao->args.play.size;
if (!audio_format_equals(&ao->inAudioFormat, &ao->outAudioFormat))
convertAudioFormat(ao, &data, &size);
ao->result = ao->plugin->play(ao->data, data, size);
ao_command_finished(ao);
}
static void *audio_output_task(void *arg)
{
struct audio_output *ao = arg;
notify_enter(&ao->notify);
while (1) {
switch (ao->command) {
case AO_COMMAND_NONE:
break;
case AO_COMMAND_OPEN:
assert(!ao->open);
ao->result = ao->plugin->open(ao->data,
&ao->outAudioFormat);
assert(!ao->open);
if (ao->result == 0)
ao->open = 1;
ao_command_finished(ao);
break;
case AO_COMMAND_CLOSE:
assert(ao->open);
ao->plugin->close(ao->data);
ao->open = 0;
ao_command_finished(ao);
break;
case AO_COMMAND_PLAY:
ao_play(ao);
break;
case AO_COMMAND_CANCEL:
ao->plugin->cancel(ao->data);
ao_command_finished(ao);
break;
case AO_COMMAND_SEND_TAG:
ao->plugin->send_tag(ao->data, ao->args.tag);
ao_command_finished(ao);
break;
case AO_COMMAND_KILL:
ao_command_finished(ao);
return NULL;
}
notify_wait(&ao->notify);
}
}
void audio_output_thread_start(struct audio_output *ao)
{
pthread_attr_t attr;
assert(ao->command == AO_COMMAND_NONE);
pthread_attr_init(&attr);
pthread_attr_setdetachstate(&attr, PTHREAD_CREATE_DETACHED);
if (pthread_create(&ao->thread, &attr, audio_output_task, ao))
FATAL("Failed to spawn output task: %s\n", strerror(errno));
}
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