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/* the Music Player Daemon (MPD)
* (c)2003-2006 by Warren Dukes (shank@mercury.chem.pitt.edu)
* This project's homepage is: http://www.musicpd.org
*
* Common data structures and functions used by FLAC and OggFLAC
* (c) 2005 by Eric Wong <normalperson@yhbt.net>
*
* 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 "../inputPlugin.h"
#if defined(HAVE_FLAC) || defined(HAVE_OGGFLAC)
#include "_flac_common.h"
#include "../log.h"
#include "../tag.h"
#include "../inputStream.h"
#include "../outputBuffer.h"
#include "../decode.h"
#include "../replayGain.h"
#include <stdio.h>
#include <string.h>
#include <unistd.h>
#include <FLAC/format.h>
#include <FLAC/metadata.h>
void init_FlacData (FlacData * data, OutputBuffer * cb,
DecoderControl * dc, InputStream * inStream)
{
data->chunk_length = 0;
data->time = 0;
data->position = 0;
data->bitRate = 0;
data->cb = cb;
data->dc = dc;
data->inStream = inStream;
data->replayGainInfo = NULL;
data->tag = NULL;
}
static int flacFindVorbisCommentFloat(const FLAC__StreamMetadata * block,
char * cmnt, float * fl)
{
int offset = FLAC__metadata_object_vorbiscomment_find_entry_from(
block,0,cmnt);
if(offset >= 0) {
size_t pos = strlen(cmnt)+1; /* 1 is for '=' */
int len = block->data.vorbis_comment.comments[offset].length
-pos;
if(len > 0) {
unsigned char tmp;
unsigned char * dup = &(block->data.vorbis_comment.
comments[offset].entry[pos]);
tmp = dup[len];
dup[len] = '\0';
*fl = atof((char *)dup);
dup[len] = tmp;
return 1;
}
}
return 0;
}
/* replaygain stuff by AliasMrJones */
static void flacParseReplayGain(const FLAC__StreamMetadata *block,
FlacData * data) {
unsigned int found = 0;
if (data->replayGainInfo)
freeReplayGainInfo(data->replayGainInfo);
data->replayGainInfo = newReplayGainInfo();
found &= flacFindVorbisCommentFloat(block,"replaygain_album_gain",
&data->replayGainInfo->albumGain);
found &= flacFindVorbisCommentFloat(block,"replaygain_album_peak",
&data->replayGainInfo->albumPeak);
found &= flacFindVorbisCommentFloat(block,"replaygain_track_gain",
&data->replayGainInfo->trackGain);
found &= flacFindVorbisCommentFloat(block,"replaygain_track_peak",
&data->replayGainInfo->trackPeak);
if (!found) {
freeReplayGainInfo(data->replayGainInfo);
data->replayGainInfo = NULL;
}
}
/* tracknumber is used in VCs, MPD uses "track" ..., all the other
* tag names match */
static const char * VORBIS_COMMENT_TRACK_KEY = "tracknumber";
static const char * VORBIS_COMMENT_DISC_KEY = "discnumber";
static unsigned int commentMatchesAddToTag(
const FLAC__StreamMetadata_VorbisComment_Entry * entry,
unsigned int itemType,
MpdTag ** tag)
{
const char * str;
size_t slen;
int vlen;
switch (itemType) {
case TAG_ITEM_TRACK: str = VORBIS_COMMENT_TRACK_KEY; break;
case TAG_ITEM_DISC: str = VORBIS_COMMENT_DISC_KEY; break;
default: str = mpdTagItemKeys[itemType];
}
slen = strlen(str);
vlen = entry->length - slen - 1;
if ((vlen > 0) && (0 == strncasecmp(str,(char *)entry->entry, slen))
&& (*(entry->entry + slen) == '=')) {
if (!*tag)
*tag = newMpdTag();
addItemToMpdTagWithLen(*tag, itemType,
(char *)(entry->entry+slen + 1), vlen);
return 1;
}
return 0;
}
MpdTag * copyVorbisCommentBlockToMpdTag(const FLAC__StreamMetadata * block,
MpdTag * tag)
{
unsigned int i, j;
FLAC__StreamMetadata_VorbisComment_Entry *comments;
comments = block->data.vorbis_comment.comments;
for (i = block->data.vorbis_comment.num_comments; i != 0; --i) {
for (j = TAG_NUM_OF_ITEM_TYPES; j--; ) {
if (commentMatchesAddToTag(comments, j, &tag))
break;
}
comments++;
}
return tag;
}
void flac_metadata_common_cb(const FLAC__StreamMetadata *block, FlacData *data)
{
DecoderControl *dc = data->dc;
const FLAC__StreamMetadata_StreamInfo *si = &(block->data.stream_info);
switch(block->type) {
case FLAC__METADATA_TYPE_STREAMINFO:
dc->audioFormat.bits = si->bits_per_sample;
dc->audioFormat.sampleRate = si->sample_rate;
dc->audioFormat.channels = si->channels;
dc->totalTime = ((float)si->total_samples) / (si->sample_rate);
getOutputAudioFormat(&(dc->audioFormat),
&(data->cb->audioFormat));
break;
case FLAC__METADATA_TYPE_VORBIS_COMMENT:
flacParseReplayGain(block,data);
default:
break;
}
}
void flac_error_common_cb( const char * plugin,
const FLAC__StreamDecoderErrorStatus status,
FlacData *data)
{
if(data->dc->stop) return;
switch(status) {
case FLAC__STREAM_DECODER_ERROR_STATUS_LOST_SYNC:
ERROR("%s lost sync\n", plugin);
break;
case FLAC__STREAM_DECODER_ERROR_STATUS_BAD_HEADER:
ERROR("bad %s header\n", plugin);
break;
case FLAC__STREAM_DECODER_ERROR_STATUS_FRAME_CRC_MISMATCH:
ERROR("%s crc mismatch\n", plugin);
break;
default:
ERROR("unknown %s error\n",plugin);
}
}
#endif /* HAVE_FLAC || HAVE_OGGFLAC */
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