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/* the Music Player Daemon (MPD)
* Copyright (C) 2003-2007 by Warren Dukes (warren.dukes@gmail.com)
* 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_control.h"
#include "output_api.h"
#include "pcm_utils.h"
#include "utils.h"
#include "audio.h"
int openAudioOutput(struct audio_output *audioOutput,
const struct audio_format *audioFormat)
{
int ret = 0;
if (audioOutput->open &&
0 == cmpAudioFormat(audioFormat, &audioOutput->inAudioFormat)) {
return 0;
}
copyAudioFormat(&audioOutput->inAudioFormat, audioFormat);
if (audioOutput->convertAudioFormat) {
copyAudioFormat(&audioOutput->outAudioFormat,
&audioOutput->reqAudioFormat);
} else {
copyAudioFormat(&audioOutput->outAudioFormat,
&audioOutput->inAudioFormat);
if (audioOutput->open)
closeAudioOutput(audioOutput);
}
if (!audioOutput->open)
ret = audioOutput->plugin->open(audioOutput);
audioOutput->sameInAndOutFormats =
!cmpAudioFormat(&audioOutput->inAudioFormat,
&audioOutput->outAudioFormat);
return ret;
}
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;
}
int playAudioOutput(struct audio_output *audioOutput,
const char *playChunk, size_t size)
{
int ret;
if (!audioOutput->open)
return -1;
if (!audioOutput->sameInAndOutFormats) {
convertAudioFormat(audioOutput, &playChunk, &size);
}
ret = audioOutput->plugin->play(audioOutput, playChunk, size);
return ret;
}
void dropBufferedAudioOutput(struct audio_output *audioOutput)
{
if (audioOutput->open)
audioOutput->plugin->cancel(audioOutput);
}
void closeAudioOutput(struct audio_output *audioOutput)
{
if (audioOutput->open)
audioOutput->plugin->close(audioOutput);
}
void finishAudioOutput(struct audio_output *audioOutput)
{
closeAudioOutput(audioOutput);
if (audioOutput->plugin->finish)
audioOutput->plugin->finish(audioOutput);
if (audioOutput->convBuffer)
free(audioOutput->convBuffer);
}
void sendMetadataToAudioOutput(struct audio_output *audioOutput,
const struct tag *tag)
{
if (audioOutput->plugin->send_tag)
audioOutput->plugin->send_tag(audioOutput, tag);
}
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