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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 "outputBuffer.h"
#include "pcm_utils.h"
#include "playerData.h"
#include "utils.h"
#include "log.h"
#include "normalize.h"
#include "conf.h"
#include "os_compat.h"
static mpd_sint16 currentChunk = -1;
void initOutputBuffer(OutputBuffer * cb, char *chunks)
{
memset(&cb->convState, 0, sizeof(ConvState));
cb->chunks = chunks;
cb->chunkSize = (mpd_uint16 *) (((char *)cb->chunks) +
buffered_chunks * CHUNK_SIZE);
cb->bitRate = (mpd_uint16 *) (((char *)cb->chunkSize) +
buffered_chunks * sizeof(mpd_sint16));
cb->times = (float *)(((char *)cb->bitRate) +
buffered_chunks * sizeof(mpd_sint8));
}
void clearOutputBuffer(OutputBuffer * cb)
{
cb->end = cb->begin;
currentChunk = -1;
}
void flushOutputBuffer(OutputBuffer * cb)
{
if (currentChunk == cb->end) {
if (((unsigned)cb->end + 1) >= buffered_chunks) {
cb->end = 0;
}
else cb->end++;
currentChunk = -1;
}
}
int sendDataToOutputBuffer(OutputBuffer * cb, InputStream * inStream,
DecoderControl * dc, int seekable, void *dataIn,
size_t dataInLen, float data_time, mpd_uint16 bitRate,
ReplayGainInfo * replayGainInfo)
{
mpd_uint16 dataToSend;
mpd_uint16 chunkLeft;
char *data;
size_t datalen;
static char *convBuffer;
static size_t convBufferLen;
if (cmpAudioFormat(&(cb->audioFormat), &(dc->audioFormat)) == 0) {
data = dataIn;
datalen = dataInLen;
} else {
datalen = pcm_sizeOfConvBuffer(&(dc->audioFormat), dataInLen,
&(cb->audioFormat));
if (datalen > convBufferLen) {
if (convBuffer != NULL)
free(convBuffer);
convBuffer = xmalloc(datalen);
convBufferLen = datalen;
}
data = convBuffer;
datalen = pcm_convertAudioFormat(&(dc->audioFormat), dataIn,
dataInLen, &(cb->audioFormat),
data, &(cb->convState));
}
if (replayGainInfo && (replayGainState != REPLAYGAIN_OFF))
doReplayGain(replayGainInfo, data, datalen, &cb->audioFormat);
else if (normalizationEnabled)
normalizeData(data, datalen, &cb->audioFormat);
while (datalen) {
if (currentChunk != cb->end) {
unsigned int next = cb->end + 1;
if (next >= buffered_chunks) {
next = 0;
}
while (cb->begin == next && !dc->stop) {
if (dc->seek) {
if (seekable) {
return OUTPUT_BUFFER_DC_SEEK;
} else {
dc->seekError = 1;
dc->seek = 0;
decoder_wakeup_player();
}
}
if (!inStream ||
bufferInputStream(inStream) <= 0) {
decoder_sleep();
}
}
if (dc->stop)
return OUTPUT_BUFFER_DC_STOP;
currentChunk = cb->end;
cb->chunkSize[currentChunk] = 0;
cb->bitRate[currentChunk] = bitRate;
cb->times[currentChunk] = data_time;
}
chunkLeft = CHUNK_SIZE - cb->chunkSize[currentChunk];
dataToSend = datalen > chunkLeft ? chunkLeft : datalen;
memcpy(cb->chunks + currentChunk * CHUNK_SIZE +
cb->chunkSize[currentChunk], data, dataToSend);
cb->chunkSize[currentChunk] += dataToSend;
datalen -= dataToSend;
data += dataToSend;
if (cb->chunkSize[currentChunk] == CHUNK_SIZE) {
flushOutputBuffer(cb);
}
}
decoder_wakeup_player();
return 0;
}
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