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some begging code of abstracting out some simple buffer routine(s) for decoders

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git-svn-id: https://svn.musicpd.org/mpd/trunk@928 09075e82-0dd4-0310-85a5-a0d7c8717e4f
This commit is contained in:
Warren Dukes 2004-05-07 02:42:49 +00:00
parent f5075e1b11
commit 9196023f14
1 changed files with 66 additions and 0 deletions
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src/outputBuffer.c Normal file
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/* the Music Player Daemon (MPD)
* (c)2003-2004 by Warren Dukes (shank@mercury.chem.pitt.edu)
* 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 "outputBuffer.h"
#include "pcm_utils.h"
#include "playerData.h"
#include "log.h"
#include "utils.h"
#include <string.h>
#include <errno.h>
#define OUTPUT_BUFFER_DC_STOP -1
#define OUTPUT_BUFFER_DC_SEEK -2
long sendDataToOutputBuffer(Buffer * cb, DecoderControl * dc, int flushAllData,
char * data, long datalen, float time, mpd_uint16 bitRate)
{
long dataSent = 0;
long dataToSend;
while(datalen >= CHUNK_SIZE || (flushAllData && datalen)) {
dataToSend = datalen > CHUNK_SIZE ? CHUNK_SIZE : datalen;
while(cb->begin==cb->end && cb->wrap && !dc->stop && !dc->seek)
my_usleep(10000);
if(dc->stop) return OUTPUT_BUFFER_DC_STOP;
/* just for now, so it doesn't hang */
if(dc->seek) return OUTPUT_BUFFER_DC_SEEK;
/* be sure to remove this! */
memcpy(cb->chunks+cb->end*CHUNK_SIZE,data,dataToSend);
cb->chunkSize[cb->end] = dataToSend;
cb->bitRate[cb->end] = bitRate;
cb->times[cb->end] = time;
cb->end++;
if(cb->end>=buffered_chunks) {
cb->end = 0;
cb->wrap = 1;
}
datalen-= dataToSend;
dataSent+= dataToSend;
data+= dataToSend;
}
return dataSent;
}
/* vim:set shiftwidth=4 tabstop=8 expandtab: */